projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ixgbe: Cleanup the use of tabs and spaces
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c
CommitLineData
9a799d71
AK		 1/*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
434c5e39 4 Copyright(c) 1999 - 2013 Intel Corporation.
9a799d71
AK		 5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
9a799d71
AK		 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28#include <linux/types.h>
29#include <linux/module.h>
30#include <linux/pci.h>
31#include <linux/netdevice.h>
32#include <linux/vmalloc.h>
33#include <linux/string.h>
34#include <linux/in.h>
a6b7a407 35#include <linux/interrupt.h>
9a799d71
AK		 36#include <linux/ip.h>
37#include <linux/tcp.h>
897ab156 38#include <linux/sctp.h>
60127865 39#include <linux/pkt_sched.h>
9a799d71 40#include <linux/ipv6.h>
5a0e3ad6 41#include <linux/slab.h>
9a799d71
AK		 42#include <net/checksum.h>
43#include <net/ip6_checksum.h>
44#include <linux/ethtool.h>
01789349 45#include <linux/if.h>
9a799d71 46#include <linux/if_vlan.h>
815cccbf 47#include <linux/if_bridge.h>
70c71606 48#include <linux/prefetch.h>
eacd73f7 49#include <scsi/fc/fc_fcoe.h>
9a799d71
AK		 50
51#include "ixgbe.h"
52#include "ixgbe_common.h"
ee5f784a 53#include "ixgbe_dcb_82599.h"
1cdd1ec8 54#include "ixgbe_sriov.h"
9a799d71
AK		 55
56char ixgbe_driver_name[] = "ixgbe";
9c8eb720 57static const char ixgbe_driver_string[] =
e8e9f696 58 "Intel(R) 10 Gigabit PCI Express Network Driver";
8af3c33f 59#ifdef IXGBE_FCOE
ea81875a
NP		 60char ixgbe_default_device_descr[] =
61 "Intel(R) 10 Gigabit Network Connection";
8af3c33f
JK		 62#else
63static char ixgbe_default_device_descr[] =
64 "Intel(R) 10 Gigabit Network Connection";
65#endif
93ac03be 66#define DRV_VERSION "3.15.1-k"
9c8eb720 67const char ixgbe_driver_version[] = DRV_VERSION;
a52055e0 68static const char ixgbe_copyright[] =
434c5e39 69 "Copyright (c) 1999-2013 Intel Corporation.";
9a799d71
AK		 70
71static const struct ixgbe_info *ixgbe_info_tbl[] = {
b4617240 72 [board_82598] = &ixgbe_82598_info,
e8e26350 73 [board_82599] = &ixgbe_82599_info,
fe15e8e1 74 [board_X540] = &ixgbe_X540_info,
9a799d71
AK		 75};
76
77/* ixgbe_pci_tbl - PCI Device ID Table
78 *
79 * Wildcard entries (PCI_ANY_ID) should come last
80 * Last entry must be all 0s
81 *
82 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
83 * Class, Class Mask, private data (not used) }
84 */
a3aa1884 85static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
54239c67
AD		 86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
8f58332b 112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
7d145282 113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
9e791e4a 114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
df376f0d 115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
9a799d71
AK		 116 /* required last entry */
117 {0, }
118};
119MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
120
5dd2d332 121#ifdef CONFIG_IXGBE_DCA
bd0362dd 122static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
e8e9f696 123 void *p);
bd0362dd
JC		 124static struct notifier_block dca_notifier = {
125 .notifier_call = ixgbe_notify_dca,
126 .next = NULL,
127 .priority = 0
128};
129#endif
130
1cdd1ec8
GR		 131#ifdef CONFIG_PCI_IOV
132static unsigned int max_vfs;
133module_param(max_vfs, uint, 0);
e8e9f696 134MODULE_PARM_DESC(max_vfs,
6b42a9c5 135 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63");
1cdd1ec8
GR		 136#endif /* CONFIG_PCI_IOV */
137
8ef78adc
PWJ		 138static unsigned int allow_unsupported_sfp;
139module_param(allow_unsupported_sfp, uint, 0);
140MODULE_PARM_DESC(allow_unsupported_sfp,
141 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
142
b3f4d599 143#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
144static int debug = -1;
145module_param(debug, int, 0);
146MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
147
9a799d71
AK		 148MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
149MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
150MODULE_LICENSE("GPL");
151MODULE_VERSION(DRV_VERSION);
152
b8e82001
JK		 153static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
154 u32 reg, u16 *value)
155{
156 int pos = 0;
157 struct pci_dev *parent_dev;
158 struct pci_bus *parent_bus;
159
160 parent_bus = adapter->pdev->bus->parent;
161 if (!parent_bus)
162 return -1;
163
164 parent_dev = parent_bus->self;
165 if (!parent_dev)
166 return -1;
167
168 pos = pci_find_capability(parent_dev, PCI_CAP_ID_EXP);
169 if (!pos)
170 return -1;
171
172 pci_read_config_word(parent_dev, pos + reg, value);
173 return 0;
174}
175
176static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
177{
178 struct ixgbe_hw *hw = &adapter->hw;
179 u16 link_status = 0;
180 int err;
181
182 hw->bus.type = ixgbe_bus_type_pci_express;
183
184 /* Get the negotiated link width and speed from PCI config space of the
185 * parent, as this device is behind a switch
186 */
187 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
188
189 /* assume caller will handle error case */
190 if (err)
191 return err;
192
193 hw->bus.width = ixgbe_convert_bus_width(link_status);
194 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
195
196 return 0;
197}
198
e027d1ae
JK		 199/**
200 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
201 * @hw: hw specific details
202 *
203 * This function is used by probe to determine whether a device's PCI-Express
204 * bandwidth details should be gathered from the parent bus instead of from the
205 * device. Used to ensure that various locations all have the correct device ID
206 * checks.
207 */
208static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
209{
210 switch (hw->device_id) {
211 case IXGBE_DEV_ID_82599_SFP_SF_QP:
8f58332b 212 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
e027d1ae
JK		 213 return true;
214 default:
215 return false;
216 }
217}
218
219static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
220 int expected_gts)
221{
222 int max_gts = 0;
223 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
224 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
225 struct pci_dev *pdev;
226
227 /* determine whether to use the the parent device
228 */
229 if (ixgbe_pcie_from_parent(&adapter->hw))
230 pdev = adapter->pdev->bus->parent->self;
231 else
232 pdev = adapter->pdev;
233
234 if (pcie_get_minimum_link(pdev, &speed, &width) ||
235 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
236 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
237 return;
238 }
239
240 switch (speed) {
241 case PCIE_SPEED_2_5GT:
242 /* 8b/10b encoding reduces max throughput by 20% */
243 max_gts = 2 * width;
244 break;
245 case PCIE_SPEED_5_0GT:
246 /* 8b/10b encoding reduces max throughput by 20% */
247 max_gts = 4 * width;
248 break;
249 case PCIE_SPEED_8_0GT:
250 /* 128b/130b encoding only reduces throughput by 1% */
251 max_gts = 8 * width;
252 break;
253 default:
254 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
255 return;
256 }
257
258 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
259 max_gts);
260 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
261 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
262 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
263 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
264 "Unknown"),
265 width,
266 (speed == PCIE_SPEED_2_5GT ? "20%" :
267 speed == PCIE_SPEED_5_0GT ? "20%" :
268 speed == PCIE_SPEED_8_0GT ? "N/a" :
269 "Unknown"));
270
271 if (max_gts < expected_gts) {
272 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
273 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
274 expected_gts);
275 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
276 }
277}
278
7086400d
AD		 279static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
280{
281 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
282 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
283 schedule_work(&adapter->service_task);
284}
285
286static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
287{
288 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
289
52f33af8 290 /* flush memory to make sure state is correct before next watchdog */
7086400d
AD		 291 smp_mb__before_clear_bit();
292 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
293}
294
dcd79aeb
TI		 295struct ixgbe_reg_info {
296 u32 ofs;
297 char *name;
298};
299
300static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
301
302 /* General Registers */
303 {IXGBE_CTRL, "CTRL"},
304 {IXGBE_STATUS, "STATUS"},
305 {IXGBE_CTRL_EXT, "CTRL_EXT"},
306
307 /* Interrupt Registers */
308 {IXGBE_EICR, "EICR"},
309
310 /* RX Registers */
311 {IXGBE_SRRCTL(0), "SRRCTL"},
312 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
313 {IXGBE_RDLEN(0), "RDLEN"},
314 {IXGBE_RDH(0), "RDH"},
315 {IXGBE_RDT(0), "RDT"},
316 {IXGBE_RXDCTL(0), "RXDCTL"},
317 {IXGBE_RDBAL(0), "RDBAL"},
318 {IXGBE_RDBAH(0), "RDBAH"},
319
320 /* TX Registers */
321 {IXGBE_TDBAL(0), "TDBAL"},
322 {IXGBE_TDBAH(0), "TDBAH"},
323 {IXGBE_TDLEN(0), "TDLEN"},
324 {IXGBE_TDH(0), "TDH"},
325 {IXGBE_TDT(0), "TDT"},
326 {IXGBE_TXDCTL(0), "TXDCTL"},
327
328 /* List Terminator */
329 {}
330};
331
332
333/*
334 * ixgbe_regdump - register printout routine
335 */
336static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
337{
338 int i = 0, j = 0;
339 char rname[16];
340 u32 regs[64];
341
342 switch (reginfo->ofs) {
343 case IXGBE_SRRCTL(0):
344 for (i = 0; i < 64; i++)
345 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
346 break;
347 case IXGBE_DCA_RXCTRL(0):
348 for (i = 0; i < 64; i++)
349 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
350 break;
351 case IXGBE_RDLEN(0):
352 for (i = 0; i < 64; i++)
353 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
354 break;
355 case IXGBE_RDH(0):
356 for (i = 0; i < 64; i++)
357 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
358 break;
359 case IXGBE_RDT(0):
360 for (i = 0; i < 64; i++)
361 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
362 break;
363 case IXGBE_RXDCTL(0):
364 for (i = 0; i < 64; i++)
365 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
366 break;
367 case IXGBE_RDBAL(0):
368 for (i = 0; i < 64; i++)
369 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
370 break;
371 case IXGBE_RDBAH(0):
372 for (i = 0; i < 64; i++)
373 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
374 break;
375 case IXGBE_TDBAL(0):
376 for (i = 0; i < 64; i++)
377 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
378 break;
379 case IXGBE_TDBAH(0):
380 for (i = 0; i < 64; i++)
381 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
382 break;
383 case IXGBE_TDLEN(0):
384 for (i = 0; i < 64; i++)
385 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
386 break;
387 case IXGBE_TDH(0):
388 for (i = 0; i < 64; i++)
389 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
390 break;
391 case IXGBE_TDT(0):
392 for (i = 0; i < 64; i++)
393 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
394 break;
395 case IXGBE_TXDCTL(0):
396 for (i = 0; i < 64; i++)
397 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
398 break;
399 default:
c7689578 400 pr_info("%-15s %08x\n", reginfo->name,
dcd79aeb
TI		 401 IXGBE_READ_REG(hw, reginfo->ofs));
402 return;
403 }
404
405 for (i = 0; i < 8; i++) {
406 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
c7689578 407 pr_err("%-15s", rname);
dcd79aeb 408 for (j = 0; j < 8; j++)
c7689578
JP		 409 pr_cont(" %08x", regs[i*8+j]);
410 pr_cont("\n");
dcd79aeb
TI		 411 }
412
413}
414
415/*
416 * ixgbe_dump - Print registers, tx-rings and rx-rings
417 */
418static void ixgbe_dump(struct ixgbe_adapter *adapter)
419{
420 struct net_device *netdev = adapter->netdev;
421 struct ixgbe_hw *hw = &adapter->hw;
422 struct ixgbe_reg_info *reginfo;
423 int n = 0;
424 struct ixgbe_ring *tx_ring;
729739b7 425 struct ixgbe_tx_buffer *tx_buffer;
dcd79aeb
TI		 426 union ixgbe_adv_tx_desc *tx_desc;
427 struct my_u0 { u64 a; u64 b; } *u0;
428 struct ixgbe_ring *rx_ring;
429 union ixgbe_adv_rx_desc *rx_desc;
430 struct ixgbe_rx_buffer *rx_buffer_info;
431 u32 staterr;
432 int i = 0;
433
434 if (!netif_msg_hw(adapter))
435 return;
436
437 /* Print netdevice Info */
438 if (netdev) {
439 dev_info(&adapter->pdev->dev, "Net device Info\n");
c7689578 440 pr_info("Device Name state "
dcd79aeb 441 "trans_start last_rx\n");
c7689578
JP		 442 pr_info("%-15s %016lX %016lX %016lX\n",
443 netdev->name,
444 netdev->state,
445 netdev->trans_start,
446 netdev->last_rx);
dcd79aeb
TI		 447 }
448
449 /* Print Registers */
450 dev_info(&adapter->pdev->dev, "Register Dump\n");
c7689578 451 pr_info(" Register Name Value\n");
dcd79aeb
TI		 452 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
453 reginfo->name; reginfo++) {
454 ixgbe_regdump(hw, reginfo);
455 }
456
457 /* Print TX Ring Summary */
458 if (!netdev || !netif_running(netdev))
459 goto exit;
460
461 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
8ad88e37
JH		 462 pr_info(" %s %s %s %s\n",
463 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
464 "leng", "ntw", "timestamp");
dcd79aeb
TI		 465 for (n = 0; n < adapter->num_tx_queues; n++) {
466 tx_ring = adapter->tx_ring[n];
729739b7 467 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
8ad88e37 468 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
dcd79aeb 469 n, tx_ring->next_to_use, tx_ring->next_to_clean,
729739b7
AD		 470 (u64)dma_unmap_addr(tx_buffer, dma),
471 dma_unmap_len(tx_buffer, len),
472 tx_buffer->next_to_watch,
473 (u64)tx_buffer->time_stamp);
dcd79aeb
TI		 474 }
475
476 /* Print TX Rings */
477 if (!netif_msg_tx_done(adapter))
478 goto rx_ring_summary;
479
480 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
481
482 /* Transmit Descriptor Formats
483 *
39ac868a 484 * 82598 Advanced Transmit Descriptor
dcd79aeb
TI		 485 * +--------------------------------------------------------------+
486 * 0 | Buffer Address [63:0] |
487 * +--------------------------------------------------------------+
39ac868a 488 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
dcd79aeb
TI		 489 * +--------------------------------------------------------------+
490 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
39ac868a
JH		 491 *
492 * 82598 Advanced Transmit Descriptor (Write-Back Format)
493 * +--------------------------------------------------------------+
494 * 0 | RSV [63:0] |
495 * +--------------------------------------------------------------+
496 * 8 | RSV | STA | NXTSEQ |
497 * +--------------------------------------------------------------+
498 * 63 36 35 32 31 0
499 *
500 * 82599+ Advanced Transmit Descriptor
501 * +--------------------------------------------------------------+
502 * 0 | Buffer Address [63:0] |
503 * +--------------------------------------------------------------+
504 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
505 * +--------------------------------------------------------------+
506 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
507 *
508 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
509 * +--------------------------------------------------------------+
510 * 0 | RSV [63:0] |
511 * +--------------------------------------------------------------+
512 * 8 | RSV | STA | RSV |
513 * +--------------------------------------------------------------+
514 * 63 36 35 32 31 0
dcd79aeb
TI		 515 */
516
517 for (n = 0; n < adapter->num_tx_queues; n++) {
518 tx_ring = adapter->tx_ring[n];
c7689578
JP		 519 pr_info("------------------------------------\n");
520 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
521 pr_info("------------------------------------\n");
8ad88e37
JH		 522 pr_info("%s%s %s %s %s %s\n",
523 "T [desc] [address 63:0 ] ",
524 "[PlPOIdStDDt Ln] [bi->dma ] ",
525 "leng", "ntw", "timestamp", "bi->skb");
dcd79aeb
TI		 526
527 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
e4f74028 528 tx_desc = IXGBE_TX_DESC(tx_ring, i);
729739b7 529 tx_buffer = &tx_ring->tx_buffer_info[i];
dcd79aeb 530 u0 = (struct my_u0 *)tx_desc;
8ad88e37
JH		 531 if (dma_unmap_len(tx_buffer, len) > 0) {
532 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
533 i,
534 le64_to_cpu(u0->a),
535 le64_to_cpu(u0->b),
536 (u64)dma_unmap_addr(tx_buffer, dma),
729739b7 537 dma_unmap_len(tx_buffer, len),
8ad88e37
JH		 538 tx_buffer->next_to_watch,
539 (u64)tx_buffer->time_stamp,
540 tx_buffer->skb);
541 if (i == tx_ring->next_to_use &&
542 i == tx_ring->next_to_clean)
543 pr_cont(" NTC/U\n");
544 else if (i == tx_ring->next_to_use)
545 pr_cont(" NTU\n");
546 else if (i == tx_ring->next_to_clean)
547 pr_cont(" NTC\n");
548 else
549 pr_cont("\n");
550
551 if (netif_msg_pktdata(adapter) &&
552 tx_buffer->skb)
553 print_hex_dump(KERN_INFO, "",
554 DUMP_PREFIX_ADDRESS, 16, 1,
555 tx_buffer->skb->data,
556 dma_unmap_len(tx_buffer, len),
557 true);
558 }
dcd79aeb
TI		 559 }
560 }
561
562 /* Print RX Rings Summary */
563rx_ring_summary:
564 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
c7689578 565 pr_info("Queue [NTU] [NTC]\n");
dcd79aeb
TI		 566 for (n = 0; n < adapter->num_rx_queues; n++) {
567 rx_ring = adapter->rx_ring[n];
c7689578
JP		 568 pr_info("%5d %5X %5X\n",
569 n, rx_ring->next_to_use, rx_ring->next_to_clean);
dcd79aeb
TI		 570 }
571
572 /* Print RX Rings */
573 if (!netif_msg_rx_status(adapter))
574 goto exit;
575
576 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
577
39ac868a
JH		 578 /* Receive Descriptor Formats
579 *
580 * 82598 Advanced Receive Descriptor (Read) Format
dcd79aeb
TI		 581 * 63 1 0
582 * +-----------------------------------------------------+
583 * 0 | Packet Buffer Address [63:1] |A0/NSE|
584 * +----------------------------------------------+------+
585 * 8 | Header Buffer Address [63:1] | DD |
586 * +-----------------------------------------------------+
587 *
588 *
39ac868a 589 * 82598 Advanced Receive Descriptor (Write-Back) Format
dcd79aeb
TI		 590 *
591 * 63 48 47 32 31 30 21 20 16 15 4 3 0
592 * +------------------------------------------------------+
39ac868a
JH		 593 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
594 * | Packet | IP | | | | Type | Type |
595 * | Checksum | Ident | | | | | |
dcd79aeb
TI		 596 * +------------------------------------------------------+
597 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
598 * +------------------------------------------------------+
599 * 63 48 47 32 31 20 19 0
39ac868a
JH		 600 *
601 * 82599+ Advanced Receive Descriptor (Read) Format
602 * 63 1 0
603 * +-----------------------------------------------------+
604 * 0 | Packet Buffer Address [63:1] |A0/NSE|
605 * +----------------------------------------------+------+
606 * 8 | Header Buffer Address [63:1] | DD |
607 * +-----------------------------------------------------+
608 *
609 *
610 * 82599+ Advanced Receive Descriptor (Write-Back) Format
611 *
612 * 63 48 47 32 31 30 21 20 17 16 4 3 0
613 * +------------------------------------------------------+
614 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
615 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
616 * |/ Flow Dir Flt ID | | | | | |
617 * +------------------------------------------------------+
618 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
619 * +------------------------------------------------------+
620 * 63 48 47 32 31 20 19 0
dcd79aeb 621 */
39ac868a 622
dcd79aeb
TI		 623 for (n = 0; n < adapter->num_rx_queues; n++) {
624 rx_ring = adapter->rx_ring[n];
c7689578
JP		 625 pr_info("------------------------------------\n");
626 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
627 pr_info("------------------------------------\n");
8ad88e37
JH		 628 pr_info("%s%s%s",
629 "R [desc] [ PktBuf A0] ",
630 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
dcd79aeb 631 "<-- Adv Rx Read format\n");
8ad88e37
JH		 632 pr_info("%s%s%s",
633 "RWB[desc] [PcsmIpSHl PtRs] ",
634 "[vl er S cks ln] ---------------- [bi->skb ] ",
dcd79aeb
TI		 635 "<-- Adv Rx Write-Back format\n");
636
637 for (i = 0; i < rx_ring->count; i++) {
638 rx_buffer_info = &rx_ring->rx_buffer_info[i];
e4f74028 639 rx_desc = IXGBE_RX_DESC(rx_ring, i);
dcd79aeb
TI		 640 u0 = (struct my_u0 *)rx_desc;
641 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
642 if (staterr & IXGBE_RXD_STAT_DD) {
643 /* Descriptor Done */
c7689578 644 pr_info("RWB[0x%03X] %016llX "
dcd79aeb
TI		 645 "%016llX ---------------- %p", i,
646 le64_to_cpu(u0->a),
647 le64_to_cpu(u0->b),
648 rx_buffer_info->skb);
649 } else {
c7689578 650 pr_info("R [0x%03X] %016llX "
dcd79aeb
TI		 651 "%016llX %016llX %p", i,
652 le64_to_cpu(u0->a),
653 le64_to_cpu(u0->b),
654 (u64)rx_buffer_info->dma,
655 rx_buffer_info->skb);
656
9c50c035
ET		 657 if (netif_msg_pktdata(adapter) &&
658 rx_buffer_info->dma) {
dcd79aeb
TI		 659 print_hex_dump(KERN_INFO, "",
660 DUMP_PREFIX_ADDRESS, 16, 1,
9c50c035
ET		 661 page_address(rx_buffer_info->page) +
662 rx_buffer_info->page_offset,
f800326d 663 ixgbe_rx_bufsz(rx_ring), true);
dcd79aeb
TI		 664 }
665 }
666
667 if (i == rx_ring->next_to_use)
c7689578 668 pr_cont(" NTU\n");
dcd79aeb 669 else if (i == rx_ring->next_to_clean)
c7689578 670 pr_cont(" NTC\n");
dcd79aeb 671 else
c7689578 672 pr_cont("\n");
dcd79aeb
TI		 673
674 }
675 }
676
677exit:
678 return;
679}
680
5eba3699
AV		 681static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
682{
683 u32 ctrl_ext;
684
685 /* Let firmware take over control of h/w */
686 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
687 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
e8e9f696 688 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
5eba3699
AV		 689}
690
691static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
692{
693 u32 ctrl_ext;
694
695 /* Let firmware know the driver has taken over */
696 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
697 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
e8e9f696 698 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
5eba3699 699}
9a799d71 700
49ce9c2c 701/**
e8e26350
PW		 702 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
703 * @adapter: pointer to adapter struct
704 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
705 * @queue: queue to map the corresponding interrupt to
706 * @msix_vector: the vector to map to the corresponding queue
707 *
708 */
709static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
e8e9f696 710 u8 queue, u8 msix_vector)
9a799d71
AK		 711{
712 u32 ivar, index;
e8e26350
PW		 713 struct ixgbe_hw *hw = &adapter->hw;
714 switch (hw->mac.type) {
715 case ixgbe_mac_82598EB:
716 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
717 if (direction == -1)
718 direction = 0;
719 index = (((direction * 64) + queue) >> 2) & 0x1F;
720 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
721 ivar &= ~(0xFF << (8 * (queue & 0x3)));
722 ivar |= (msix_vector << (8 * (queue & 0x3)));
723 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
724 break;
725 case ixgbe_mac_82599EB:
b93a2226 726 case ixgbe_mac_X540:
e8e26350
PW		 727 if (direction == -1) {
728 /* other causes */
729 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
730 index = ((queue & 1) * 8);
731 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
732 ivar &= ~(0xFF << index);
733 ivar |= (msix_vector << index);
734 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
735 break;
736 } else {
737 /* tx or rx causes */
738 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
739 index = ((16 * (queue & 1)) + (8 * direction));
740 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
741 ivar &= ~(0xFF << index);
742 ivar |= (msix_vector << index);
743 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
744 break;
745 }
746 default:
747 break;
748 }
9a799d71
AK		 749}
750
fe49f04a 751static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
e8e9f696 752 u64 qmask)
fe49f04a
AD		 753{
754 u32 mask;
755
bd508178
AD		 756 switch (adapter->hw.mac.type) {
757 case ixgbe_mac_82598EB:
fe49f04a
AD		 758 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
759 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
bd508178
AD		 760 break;
761 case ixgbe_mac_82599EB:
b93a2226 762 case ixgbe_mac_X540:
fe49f04a
AD		 763 mask = (qmask & 0xFFFFFFFF);
764 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
765 mask = (qmask >> 32);
766 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
bd508178
AD		 767 break;
768 default:
769 break;
fe49f04a
AD		 770 }
771}
772
729739b7
AD		 773void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
774 struct ixgbe_tx_buffer *tx_buffer)
9a799d71 775{
729739b7
AD		 776 if (tx_buffer->skb) {
777 dev_kfree_skb_any(tx_buffer->skb);
778 if (dma_unmap_len(tx_buffer, len))
d3d00239 779 dma_unmap_single(ring->dev,
729739b7
AD		 780 dma_unmap_addr(tx_buffer, dma),
781 dma_unmap_len(tx_buffer, len),
782 DMA_TO_DEVICE);
783 } else if (dma_unmap_len(tx_buffer, len)) {
784 dma_unmap_page(ring->dev,
785 dma_unmap_addr(tx_buffer, dma),
786 dma_unmap_len(tx_buffer, len),
787 DMA_TO_DEVICE);
e5a43549 788 }
729739b7
AD		 789 tx_buffer->next_to_watch = NULL;
790 tx_buffer->skb = NULL;
791 dma_unmap_len_set(tx_buffer, len, 0);
792 /* tx_buffer must be completely set up in the transmit path */
9a799d71
AK		 793}
794
943561d3 795static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
c84d324c
JF		 796{
797 struct ixgbe_hw *hw = &adapter->hw;
798 struct ixgbe_hw_stats *hwstats = &adapter->stats;
c84d324c 799 int i;
943561d3 800 u32 data;
c84d324c 801
943561d3
AD		 802 if ((hw->fc.current_mode != ixgbe_fc_full) &&
803 (hw->fc.current_mode != ixgbe_fc_rx_pause))
804 return;
c84d324c 805
943561d3
AD		 806 switch (hw->mac.type) {
807 case ixgbe_mac_82598EB:
808 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
809 break;
810 default:
811 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
812 }
813 hwstats->lxoffrxc += data;
c84d324c 814
943561d3
AD		 815 /* refill credits (no tx hang) if we received xoff */
816 if (!data)
c84d324c 817 return;
943561d3
AD		 818
819 for (i = 0; i < adapter->num_tx_queues; i++)
820 clear_bit(__IXGBE_HANG_CHECK_ARMED,
821 &adapter->tx_ring[i]->state);
822}
823
824static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
825{
826 struct ixgbe_hw *hw = &adapter->hw;
827 struct ixgbe_hw_stats *hwstats = &adapter->stats;
828 u32 xoff[8] = {0};
2afaa00d 829 u8 tc;
943561d3
AD		 830 int i;
831 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
832
833 if (adapter->ixgbe_ieee_pfc)
834 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
835
836 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
837 ixgbe_update_xoff_rx_lfc(adapter);
c84d324c 838 return;
943561d3 839 }
c84d324c
JF		 840
841 /* update stats for each tc, only valid with PFC enabled */
842 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
2afaa00d
PN		 843 u32 pxoffrxc;
844
c84d324c
JF		 845 switch (hw->mac.type) {
846 case ixgbe_mac_82598EB:
2afaa00d 847 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
bd508178 848 break;
c84d324c 849 default:
2afaa00d 850 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
26f23d82 851 }
2afaa00d
PN		 852 hwstats->pxoffrxc[i] += pxoffrxc;
853 /* Get the TC for given UP */
854 tc = netdev_get_prio_tc_map(adapter->netdev, i);
855 xoff[tc] += pxoffrxc;
c84d324c
JF		 856 }
857
858 /* disarm tx queues that have received xoff frames */
859 for (i = 0; i < adapter->num_tx_queues; i++) {
860 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
c84d324c 861
2afaa00d 862 tc = tx_ring->dcb_tc;
c84d324c
JF		 863 if (xoff[tc])
864 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
26f23d82 865 }
26f23d82
YZ		 866}
867
c84d324c 868static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
9a799d71 869{
7d7ce682 870 return ring->stats.packets;
c84d324c
JF		 871}
872
873static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
874{
875 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
e01c31a5 876 struct ixgbe_hw *hw = &adapter->hw;
e01c31a5 877
c84d324c
JF		 878 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
879 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
880
881 if (head != tail)
882 return (head < tail) ?
883 tail - head : (tail + ring->count - head);
884
885 return 0;
886}
887
888static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
889{
890 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
891 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
892 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
893 bool ret = false;
894
7d637bcc 895 clear_check_for_tx_hang(tx_ring);
c84d324c
JF		 896
897 /*
898 * Check for a hung queue, but be thorough. This verifies
899 * that a transmit has been completed since the previous
900 * check AND there is at least one packet pending. The
901 * ARMED bit is set to indicate a potential hang. The
902 * bit is cleared if a pause frame is received to remove
903 * false hang detection due to PFC or 802.3x frames. By
904 * requiring this to fail twice we avoid races with
905 * pfc clearing the ARMED bit and conditions where we
906 * run the check_tx_hang logic with a transmit completion
907 * pending but without time to complete it yet.
908 */
909 if ((tx_done_old == tx_done) && tx_pending) {
910 /* make sure it is true for two checks in a row */
911 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
912 &tx_ring->state);
913 } else {
914 /* update completed stats and continue */
915 tx_ring->tx_stats.tx_done_old = tx_done;
916 /* reset the countdown */
917 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
9a799d71
AK		 918 }
919
c84d324c 920 return ret;
9a799d71
AK		 921}
922
c83c6cbd
AD		 923/**
924 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
925 * @adapter: driver private struct
926 **/
927static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
928{
929
930 /* Do the reset outside of interrupt context */
931 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
932 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
12ff3f3b 933 e_warn(drv, "initiating reset due to tx timeout\n");
c83c6cbd
AD		 934 ixgbe_service_event_schedule(adapter);
935 }
936}
e01c31a5 937
9a799d71
AK		 938/**
939 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
fe49f04a 940 * @q_vector: structure containing interrupt and ring information
e01c31a5 941 * @tx_ring: tx ring to clean
9a799d71 942 **/
fe49f04a 943static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
e8e9f696 944 struct ixgbe_ring *tx_ring)
9a799d71 945{
fe49f04a 946 struct ixgbe_adapter *adapter = q_vector->adapter;
d3d00239
AD		 947 struct ixgbe_tx_buffer *tx_buffer;
948 union ixgbe_adv_tx_desc *tx_desc;
e01c31a5 949 unsigned int total_bytes = 0, total_packets = 0;
59224555 950 unsigned int budget = q_vector->tx.work_limit;
729739b7
AD		 951 unsigned int i = tx_ring->next_to_clean;
952
953 if (test_bit(__IXGBE_DOWN, &adapter->state))
954 return true;
9a799d71 955
d3d00239 956 tx_buffer = &tx_ring->tx_buffer_info[i];
e4f74028 957 tx_desc = IXGBE_TX_DESC(tx_ring, i);
729739b7 958 i -= tx_ring->count;
12207e49 959
729739b7 960 do {
d3d00239
AD		 961 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
962
963 /* if next_to_watch is not set then there is no work pending */
964 if (!eop_desc)
965 break;
966
7f83a9e6 967 /* prevent any other reads prior to eop_desc */
7e63bf49 968 read_barrier_depends();
7f83a9e6 969
d3d00239
AD		 970 /* if DD is not set pending work has not been completed */
971 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
972 break;
8ad494b0 973
d3d00239
AD		 974 /* clear next_to_watch to prevent false hangs */
975 tx_buffer->next_to_watch = NULL;
8ad494b0 976
091a6246
AD		 977 /* update the statistics for this packet */
978 total_bytes += tx_buffer->bytecount;
979 total_packets += tx_buffer->gso_segs;
980
fd0db0ed
AD		 981 /* free the skb */
982 dev_kfree_skb_any(tx_buffer->skb);
983
729739b7
AD		 984 /* unmap skb header data */
985 dma_unmap_single(tx_ring->dev,
986 dma_unmap_addr(tx_buffer, dma),
987 dma_unmap_len(tx_buffer, len),
988 DMA_TO_DEVICE);
989
fd0db0ed
AD		 990 /* clear tx_buffer data */
991 tx_buffer->skb = NULL;
729739b7 992 dma_unmap_len_set(tx_buffer, len, 0);
fd0db0ed 993
729739b7
AD		 994 /* unmap remaining buffers */
995 while (tx_desc != eop_desc) {
d3d00239
AD		 996 tx_buffer++;
997 tx_desc++;
8ad494b0 998 i++;
729739b7
AD		 999 if (unlikely(!i)) {
1000 i -= tx_ring->count;
d3d00239 1001 tx_buffer = tx_ring->tx_buffer_info;
e4f74028 1002 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
e092be60 1003 }
e01c31a5 1004
729739b7
AD		 1005 /* unmap any remaining paged data */
1006 if (dma_unmap_len(tx_buffer, len)) {
1007 dma_unmap_page(tx_ring->dev,
1008 dma_unmap_addr(tx_buffer, dma),
1009 dma_unmap_len(tx_buffer, len),
1010 DMA_TO_DEVICE);
1011 dma_unmap_len_set(tx_buffer, len, 0);
1012 }
1013 }
1014
1015 /* move us one more past the eop_desc for start of next pkt */
1016 tx_buffer++;
1017 tx_desc++;
1018 i++;
1019 if (unlikely(!i)) {
1020 i -= tx_ring->count;
1021 tx_buffer = tx_ring->tx_buffer_info;
1022 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1023 }
1024
1025 /* issue prefetch for next Tx descriptor */
1026 prefetch(tx_desc);
12207e49 1027
729739b7
AD		 1028 /* update budget accounting */
1029 budget--;
1030 } while (likely(budget));
1031
1032 i += tx_ring->count;
9a799d71 1033 tx_ring->next_to_clean = i;
d3d00239 1034 u64_stats_update_begin(&tx_ring->syncp);
b953799e 1035 tx_ring->stats.bytes += total_bytes;
bd198058 1036 tx_ring->stats.packets += total_packets;
d3d00239 1037 u64_stats_update_end(&tx_ring->syncp);
bd198058
AD		 1038 q_vector->tx.total_bytes += total_bytes;
1039 q_vector->tx.total_packets += total_packets;
b953799e 1040
c84d324c
JF		 1041 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1042 /* schedule immediate reset if we believe we hung */
1043 struct ixgbe_hw *hw = &adapter->hw;
c84d324c
JF		 1044 e_err(drv, "Detected Tx Unit Hang\n"
1045 " Tx Queue <%d>\n"
1046 " TDH, TDT <%x>, <%x>\n"
1047 " next_to_use <%x>\n"
1048 " next_to_clean <%x>\n"
1049 "tx_buffer_info[next_to_clean]\n"
1050 " time_stamp <%lx>\n"
1051 " jiffies <%lx>\n",
1052 tx_ring->queue_index,
1053 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1054 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
d3d00239
AD		 1055 tx_ring->next_to_use, i,
1056 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
c84d324c
JF		 1057
1058 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1059
1060 e_info(probe,
1061 "tx hang %d detected on queue %d, resetting adapter\n",
1062 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1063
b953799e 1064 /* schedule immediate reset if we believe we hung */
c83c6cbd 1065 ixgbe_tx_timeout_reset(adapter);
b953799e
AD		 1066
1067 /* the adapter is about to reset, no point in enabling stuff */
59224555 1068 return true;
b953799e 1069 }
9a799d71 1070
b2d96e0a
AD		 1071 netdev_tx_completed_queue(txring_txq(tx_ring),
1072 total_packets, total_bytes);
1073
e092be60 1074#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
30065e63 1075 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
7d4987de 1076 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
e092be60
AV		 1077 /* Make sure that anybody stopping the queue after this
1078 * sees the new next_to_clean.
1079 */
1080 smp_mb();
729739b7
AD		 1081 if (__netif_subqueue_stopped(tx_ring->netdev,
1082 tx_ring->queue_index)
1083 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1084 netif_wake_subqueue(tx_ring->netdev,
1085 tx_ring->queue_index);
5b7da515 1086 ++tx_ring->tx_stats.restart_queue;
30eba97a 1087 }
e092be60 1088 }
9a799d71 1089
59224555 1090 return !!budget;
9a799d71
AK		 1091}
1092
5dd2d332 1093#ifdef CONFIG_IXGBE_DCA
bdda1a61
AD		 1094static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1095 struct ixgbe_ring *tx_ring,
33cf09c9 1096 int cpu)
bd0362dd 1097{
33cf09c9 1098 struct ixgbe_hw *hw = &adapter->hw;
bdda1a61
AD		 1099 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1100 u16 reg_offset;
33cf09c9 1101
33cf09c9
AD		 1102 switch (hw->mac.type) {
1103 case ixgbe_mac_82598EB:
bdda1a61 1104 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
33cf09c9
AD		 1105 break;
1106 case ixgbe_mac_82599EB:
b93a2226 1107 case ixgbe_mac_X540:
bdda1a61
AD		 1108 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1109 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
33cf09c9
AD		 1110 break;
1111 default:
bdda1a61
AD		 1112 /* for unknown hardware do not write register */
1113 return;
bd0362dd 1114 }
bdda1a61
AD		 1115
1116 /*
1117 * We can enable relaxed ordering for reads, but not writes when
1118 * DCA is enabled. This is due to a known issue in some chipsets
1119 * which will cause the DCA tag to be cleared.
1120 */
1121 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1122 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1123 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1124
1125 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
bd0362dd
JC		 1126}
1127
bdda1a61
AD		 1128static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1129 struct ixgbe_ring *rx_ring,
33cf09c9 1130 int cpu)
bd0362dd 1131{
33cf09c9 1132 struct ixgbe_hw *hw = &adapter->hw;
bdda1a61
AD		 1133 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1134 u8 reg_idx = rx_ring->reg_idx;
1135
33cf09c9
AD		 1136
1137 switch (hw->mac.type) {
33cf09c9 1138 case ixgbe_mac_82599EB:
b93a2226 1139 case ixgbe_mac_X540:
bdda1a61 1140 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
33cf09c9
AD		 1141 break;
1142 default:
1143 break;
1144 }
bdda1a61
AD		 1145
1146 /*
1147 * We can enable relaxed ordering for reads, but not writes when
1148 * DCA is enabled. This is due to a known issue in some chipsets
1149 * which will cause the DCA tag to be cleared.
1150 */
1151 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
bdda1a61
AD		 1152 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1153
1154 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
33cf09c9
AD		 1155}
1156
1157static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1158{
1159 struct ixgbe_adapter *adapter = q_vector->adapter;
efe3d3c8 1160 struct ixgbe_ring *ring;
bd0362dd 1161 int cpu = get_cpu();
bd0362dd 1162
33cf09c9
AD		 1163 if (q_vector->cpu == cpu)
1164 goto out_no_update;
1165
a557928e 1166 ixgbe_for_each_ring(ring, q_vector->tx)
efe3d3c8 1167 ixgbe_update_tx_dca(adapter, ring, cpu);
33cf09c9 1168
a557928e 1169 ixgbe_for_each_ring(ring, q_vector->rx)
efe3d3c8 1170 ixgbe_update_rx_dca(adapter, ring, cpu);
33cf09c9
AD		 1171
1172 q_vector->cpu = cpu;
1173out_no_update:
bd0362dd
JC		 1174 put_cpu();
1175}
1176
1177static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1178{
1179 int i;
1180
1181 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1182 return;
1183
e35ec126
AD		 1184 /* always use CB2 mode, difference is masked in the CB driver */
1185 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1186
49c7ffbe 1187 for (i = 0; i < adapter->num_q_vectors; i++) {
33cf09c9
AD		 1188 adapter->q_vector[i]->cpu = -1;
1189 ixgbe_update_dca(adapter->q_vector[i]);
bd0362dd
JC		 1190 }
1191}
1192
1193static int __ixgbe_notify_dca(struct device *dev, void *data)
1194{
c60fbb00 1195 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
bd0362dd
JC		 1196 unsigned long event = *(unsigned long *)data;
1197
2a72c31e 1198 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
33cf09c9
AD		 1199 return 0;
1200
bd0362dd
JC		 1201 switch (event) {
1202 case DCA_PROVIDER_ADD:
96b0e0f6
JB		 1203 /* if we're already enabled, don't do it again */
1204 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1205 break;
652f093f 1206 if (dca_add_requester(dev) == 0) {
96b0e0f6 1207 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
bd0362dd
JC		 1208 ixgbe_setup_dca(adapter);
1209 break;
1210 }
1211 /* Fall Through since DCA is disabled. */
1212 case DCA_PROVIDER_REMOVE:
1213 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1214 dca_remove_requester(dev);
1215 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1216 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1217 }
1218 break;
1219 }
1220
652f093f 1221 return 0;
bd0362dd 1222}
67a74ee2 1223
bdda1a61 1224#endif /* CONFIG_IXGBE_DCA */
8a0da21b
AD		 1225static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1226 union ixgbe_adv_rx_desc *rx_desc,
67a74ee2
ET		 1227 struct sk_buff *skb)
1228{
8a0da21b
AD		 1229 if (ring->netdev->features & NETIF_F_RXHASH)
1230 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
67a74ee2
ET		 1231}
1232
f800326d 1233#ifdef IXGBE_FCOE
ff886dfc
AD		 1234/**
1235 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
57efd44c 1236 * @ring: structure containing ring specific data
ff886dfc
AD		 1237 * @rx_desc: advanced rx descriptor
1238 *
1239 * Returns : true if it is FCoE pkt
1240 */
57efd44c 1241static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
ff886dfc
AD		 1242 union ixgbe_adv_rx_desc *rx_desc)
1243{
1244 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1245
57efd44c 1246 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
ff886dfc
AD		 1247 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1248 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1249 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1250}
1251
f800326d 1252#endif /* IXGBE_FCOE */
e59bd25d
AV		 1253/**
1254 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
8a0da21b
AD		 1255 * @ring: structure containing ring specific data
1256 * @rx_desc: current Rx descriptor being processed
e59bd25d
AV		 1257 * @skb: skb currently being received and modified
1258 **/
8a0da21b 1259static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
8bae1b2b 1260 union ixgbe_adv_rx_desc *rx_desc,
f56e0cb1 1261 struct sk_buff *skb)
9a799d71 1262{
8a0da21b 1263 skb_checksum_none_assert(skb);
9a799d71 1264
712744be 1265 /* Rx csum disabled */
8a0da21b 1266 if (!(ring->netdev->features & NETIF_F_RXCSUM))
9a799d71 1267 return;
e59bd25d
AV		 1268
1269 /* if IP and error */
f56e0cb1
AD		 1270 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1271 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
8a0da21b 1272 ring->rx_stats.csum_err++;
9a799d71
AK		 1273 return;
1274 }
e59bd25d 1275
f56e0cb1 1276 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
e59bd25d
AV		 1277 return;
1278
f56e0cb1 1279 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
f800326d 1280 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
8bae1b2b
DS		 1281
1282 /*
1283 * 82599 errata, UDP frames with a 0 checksum can be marked as
1284 * checksum errors.
1285 */
8a0da21b
AD		 1286 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1287 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
8bae1b2b
DS		 1288 return;
1289
8a0da21b 1290 ring->rx_stats.csum_err++;
e59bd25d
AV		 1291 return;
1292 }
1293
9a799d71 1294 /* It must be a TCP or UDP packet with a valid checksum */
e59bd25d 1295 skb->ip_summed = CHECKSUM_UNNECESSARY;
9a799d71
AK		 1296}
1297
84ea2591 1298static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
e8e26350 1299{
f56e0cb1 1300 rx_ring->next_to_use = val;
f800326d
AD		 1301
1302 /* update next to alloc since we have filled the ring */
1303 rx_ring->next_to_alloc = val;
e8e26350
PW		 1304 /*
1305 * Force memory writes to complete before letting h/w
1306 * know there are new descriptors to fetch. (Only
1307 * applicable for weak-ordered memory model archs,
1308 * such as IA-64).
1309 */
1310 wmb();
84ea2591 1311 writel(val, rx_ring->tail);
e8e26350
PW		 1312}
1313
f990b79b
AD		 1314static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1315 struct ixgbe_rx_buffer *bi)
1316{
1317 struct page *page = bi->page;
f800326d 1318 dma_addr_t dma = bi->dma;
f990b79b 1319
f800326d
AD		 1320 /* since we are recycling buffers we should seldom need to alloc */
1321 if (likely(dma))
f990b79b
AD		 1322 return true;
1323
f800326d
AD		 1324 /* alloc new page for storage */
1325 if (likely(!page)) {
0614002b
MG		 1326 page = __skb_alloc_pages(GFP_ATOMIC | __GFP_COLD | __GFP_COMP,
1327 bi->skb, ixgbe_rx_pg_order(rx_ring));
f990b79b
AD		 1328 if (unlikely(!page)) {
1329 rx_ring->rx_stats.alloc_rx_page_failed++;
1330 return false;
1331 }
f800326d 1332 bi->page = page;
f990b79b
AD		 1333 }
1334
f800326d
AD		 1335 /* map page for use */
1336 dma = dma_map_page(rx_ring->dev, page, 0,
1337 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1338
1339 /*
1340 * if mapping failed free memory back to system since
1341 * there isn't much point in holding memory we can't use
1342 */
1343 if (dma_mapping_error(rx_ring->dev, dma)) {
dd411ec4 1344 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
f800326d 1345 bi->page = NULL;
f990b79b 1346
f990b79b
AD		 1347 rx_ring->rx_stats.alloc_rx_page_failed++;
1348 return false;
1349 }
1350
f800326d 1351 bi->dma = dma;
afaa9459 1352 bi->page_offset = 0;
f800326d 1353
f990b79b
AD		 1354 return true;
1355}
1356
9a799d71 1357/**
f990b79b 1358 * ixgbe_alloc_rx_buffers - Replace used receive buffers
fc77dc3c
AD		 1359 * @rx_ring: ring to place buffers on
1360 * @cleaned_count: number of buffers to replace
9a799d71 1361 **/
fc77dc3c 1362void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
9a799d71 1363{
9a799d71 1364 union ixgbe_adv_rx_desc *rx_desc;
3a581073 1365 struct ixgbe_rx_buffer *bi;
d5f398ed 1366 u16 i = rx_ring->next_to_use;
9a799d71 1367
f800326d
AD		 1368 /* nothing to do */
1369 if (!cleaned_count)
fc77dc3c
AD		 1370 return;
1371
e4f74028 1372 rx_desc = IXGBE_RX_DESC(rx_ring, i);
f990b79b
AD		 1373 bi = &rx_ring->rx_buffer_info[i];
1374 i -= rx_ring->count;
9a799d71 1375
f800326d
AD		 1376 do {
1377 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
f990b79b 1378 break;
d5f398ed 1379
f800326d
AD		 1380 /*
1381 * Refresh the desc even if buffer_addrs didn't change
1382 * because each write-back erases this info.
1383 */
1384 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
9a799d71 1385
f990b79b
AD		 1386 rx_desc++;
1387 bi++;
9a799d71 1388 i++;
f990b79b 1389 if (unlikely(!i)) {
e4f74028 1390 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
f990b79b
AD		 1391 bi = rx_ring->rx_buffer_info;
1392 i -= rx_ring->count;
1393 }
1394
1395 /* clear the hdr_addr for the next_to_use descriptor */
1396 rx_desc->read.hdr_addr = 0;
f800326d
AD		 1397
1398 cleaned_count--;
1399 } while (cleaned_count);
7c6e0a43 1400
f990b79b
AD		 1401 i += rx_ring->count;
1402
f56e0cb1 1403 if (rx_ring->next_to_use != i)
84ea2591 1404 ixgbe_release_rx_desc(rx_ring, i);
9a799d71
AK		 1405}
1406
1d2024f6
AD		 1407/**
1408 * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
1409 * @data: pointer to the start of the headers
1410 * @max_len: total length of section to find headers in
1411 *
1412 * This function is meant to determine the length of headers that will
1413 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
1414 * motivation of doing this is to only perform one pull for IPv4 TCP
1415 * packets so that we can do basic things like calculating the gso_size
1416 * based on the average data per packet.
1417 **/
1418static unsigned int ixgbe_get_headlen(unsigned char *data,
1419 unsigned int max_len)
1420{
1421 union {
1422 unsigned char *network;
1423 /* l2 headers */
1424 struct ethhdr *eth;
1425 struct vlan_hdr *vlan;
1426 /* l3 headers */
1427 struct iphdr *ipv4;
a048b40e 1428 struct ipv6hdr *ipv6;
1d2024f6
AD		 1429 } hdr;
1430 __be16 protocol;
1431 u8 nexthdr = 0; /* default to not TCP */
1432 u8 hlen;
1433
1434 /* this should never happen, but better safe than sorry */
1435 if (max_len < ETH_HLEN)
1436 return max_len;
1437
1438 /* initialize network frame pointer */
1439 hdr.network = data;
1440
1441 /* set first protocol and move network header forward */
1442 protocol = hdr.eth->h_proto;
1443 hdr.network += ETH_HLEN;
1444
1445 /* handle any vlan tag if present */
1446 if (protocol == __constant_htons(ETH_P_8021Q)) {
1447 if ((hdr.network - data) > (max_len - VLAN_HLEN))
1448 return max_len;
1449
1450 protocol = hdr.vlan->h_vlan_encapsulated_proto;
1451 hdr.network += VLAN_HLEN;
1452 }
1453
1454 /* handle L3 protocols */
1455 if (protocol == __constant_htons(ETH_P_IP)) {
1456 if ((hdr.network - data) > (max_len - sizeof(struct iphdr)))
1457 return max_len;
1458
1459 /* access ihl as a u8 to avoid unaligned access on ia64 */
1460 hlen = (hdr.network[0] & 0x0F) << 2;
1461
1462 /* verify hlen meets minimum size requirements */
1463 if (hlen < sizeof(struct iphdr))
1464 return hdr.network - data;
1465
ed83da12 1466 /* record next protocol if header is present */
20967f42 1467 if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
ed83da12 1468 nexthdr = hdr.ipv4->protocol;
a048b40e
AD		 1469 } else if (protocol == __constant_htons(ETH_P_IPV6)) {
1470 if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))
1471 return max_len;
1472
1473 /* record next protocol */
1474 nexthdr = hdr.ipv6->nexthdr;
ed83da12 1475 hlen = sizeof(struct ipv6hdr);
f800326d 1476#ifdef IXGBE_FCOE
1d2024f6
AD		 1477 } else if (protocol == __constant_htons(ETH_P_FCOE)) {
1478 if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN))
1479 return max_len;
ed83da12 1480 hlen = FCOE_HEADER_LEN;
1d2024f6
AD		 1481#endif
1482 } else {
1483 return hdr.network - data;
1484 }
1485
ed83da12
AD		 1486 /* relocate pointer to start of L4 header */
1487 hdr.network += hlen;
1488
a048b40e 1489 /* finally sort out TCP/UDP */
1d2024f6
AD		 1490 if (nexthdr == IPPROTO_TCP) {
1491 if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
1492 return max_len;
1493
1494 /* access doff as a u8 to avoid unaligned access on ia64 */
1495 hlen = (hdr.network[12] & 0xF0) >> 2;
1496
1497 /* verify hlen meets minimum size requirements */
1498 if (hlen < sizeof(struct tcphdr))
1499 return hdr.network - data;
1500
1501 hdr.network += hlen;
a048b40e
AD		 1502 } else if (nexthdr == IPPROTO_UDP) {
1503 if ((hdr.network - data) > (max_len - sizeof(struct udphdr)))
1504 return max_len;
1505
1506 hdr.network += sizeof(struct udphdr);
1d2024f6
AD		 1507 }
1508
1509 /*
1510 * If everything has gone correctly hdr.network should be the
1511 * data section of the packet and will be the end of the header.
1512 * If not then it probably represents the end of the last recognized
1513 * header.
1514 */
1515 if ((hdr.network - data) < max_len)
1516 return hdr.network - data;
1517 else
1518 return max_len;
1519}
1520
1d2024f6
AD		 1521static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1522 struct sk_buff *skb)
1523{
f800326d 1524 u16 hdr_len = skb_headlen(skb);
1d2024f6
AD		 1525
1526 /* set gso_size to avoid messing up TCP MSS */
1527 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1528 IXGBE_CB(skb)->append_cnt);
96be80ab 1529 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1d2024f6
AD		 1530}
1531
1532static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1533 struct sk_buff *skb)
1534{
1535 /* if append_cnt is 0 then frame is not RSC */
1536 if (!IXGBE_CB(skb)->append_cnt)
1537 return;
1538
1539 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1540 rx_ring->rx_stats.rsc_flush++;
1541
1542 ixgbe_set_rsc_gso_size(rx_ring, skb);
1543
1544 /* gso_size is computed using append_cnt so always clear it last */
1545 IXGBE_CB(skb)->append_cnt = 0;
1546}
1547
8a0da21b
AD		 1548/**
1549 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1550 * @rx_ring: rx descriptor ring packet is being transacted on
1551 * @rx_desc: pointer to the EOP Rx descriptor
1552 * @skb: pointer to current skb being populated
f8212f97 1553 *
8a0da21b
AD		 1554 * This function checks the ring, descriptor, and packet information in
1555 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1556 * other fields within the skb.
f8212f97 1557 **/
8a0da21b
AD		 1558static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1559 union ixgbe_adv_rx_desc *rx_desc,
1560 struct sk_buff *skb)
f8212f97 1561{
43e95f11
JF		 1562 struct net_device *dev = rx_ring->netdev;
1563
8a0da21b
AD		 1564 ixgbe_update_rsc_stats(rx_ring, skb);
1565
1566 ixgbe_rx_hash(rx_ring, rx_desc, skb);
f8212f97 1567
8a0da21b
AD		 1568 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1569
6cb562d6 1570 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
3a6a4eda 1571
f646968f 1572 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
43e95f11 1573 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
8a0da21b 1574 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
86a9bad3 1575 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
f8212f97
AD		 1576 }
1577
8a0da21b 1578 skb_record_rx_queue(skb, rx_ring->queue_index);
aa80175a 1579
43e95f11 1580 skb->protocol = eth_type_trans(skb, dev);
f8212f97
AD		 1581}
1582
8a0da21b
AD		 1583static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1584 struct sk_buff *skb)
aa80175a 1585{
8a0da21b
AD		 1586 struct ixgbe_adapter *adapter = q_vector->adapter;
1587
5a85e737
ET		 1588 if (ixgbe_qv_ll_polling(q_vector))
1589 netif_receive_skb(skb);
1590 else if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
8a0da21b
AD		 1591 napi_gro_receive(&q_vector->napi, skb);
1592 else
1593 netif_rx(skb);
aa80175a 1594}
43634e82 1595
f800326d
AD		 1596/**
1597 * ixgbe_is_non_eop - process handling of non-EOP buffers
1598 * @rx_ring: Rx ring being processed
1599 * @rx_desc: Rx descriptor for current buffer
1600 * @skb: Current socket buffer containing buffer in progress
1601 *
1602 * This function updates next to clean. If the buffer is an EOP buffer
1603 * this function exits returning false, otherwise it will place the
1604 * sk_buff in the next buffer to be chained and return true indicating
1605 * that this is in fact a non-EOP buffer.
1606 **/
1607static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1608 union ixgbe_adv_rx_desc *rx_desc,
1609 struct sk_buff *skb)
1610{
1611 u32 ntc = rx_ring->next_to_clean + 1;
1612
1613 /* fetch, update, and store next to clean */
1614 ntc = (ntc < rx_ring->count) ? ntc : 0;
1615 rx_ring->next_to_clean = ntc;
1616
1617 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1618
5a02cbd1
AD		 1619 /* update RSC append count if present */
1620 if (ring_is_rsc_enabled(rx_ring)) {
1621 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1622 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1623
1624 if (unlikely(rsc_enabled)) {
1625 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1626
1627 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1628 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
f800326d 1629
5a02cbd1
AD		 1630 /* update ntc based on RSC value */
1631 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1632 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1633 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1634 }
f800326d
AD		 1635 }
1636
5a02cbd1
AD		 1637 /* if we are the last buffer then there is nothing else to do */
1638 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1639 return false;
1640
f800326d
AD		 1641 /* place skb in next buffer to be received */
1642 rx_ring->rx_buffer_info[ntc].skb = skb;
1643 rx_ring->rx_stats.non_eop_descs++;
1644
1645 return true;
1646}
1647
19861ce2
AD		 1648/**
1649 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1650 * @rx_ring: rx descriptor ring packet is being transacted on
1651 * @skb: pointer to current skb being adjusted
1652 *
1653 * This function is an ixgbe specific version of __pskb_pull_tail. The
1654 * main difference between this version and the original function is that
1655 * this function can make several assumptions about the state of things
1656 * that allow for significant optimizations versus the standard function.
1657 * As a result we can do things like drop a frag and maintain an accurate
1658 * truesize for the skb.
1659 */
1660static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1661 struct sk_buff *skb)
1662{
1663 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1664 unsigned char *va;
1665 unsigned int pull_len;
1666
1667 /*
1668 * it is valid to use page_address instead of kmap since we are
1669 * working with pages allocated out of the lomem pool per
1670 * alloc_page(GFP_ATOMIC)
1671 */
1672 va = skb_frag_address(frag);
1673
1674 /*
1675 * we need the header to contain the greater of either ETH_HLEN or
1676 * 60 bytes if the skb->len is less than 60 for skb_pad.
1677 */
cf3fe7ac 1678 pull_len = ixgbe_get_headlen(va, IXGBE_RX_HDR_SIZE);
19861ce2
AD		 1679
1680 /* align pull length to size of long to optimize memcpy performance */
1681 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1682
1683 /* update all of the pointers */
1684 skb_frag_size_sub(frag, pull_len);
1685 frag->page_offset += pull_len;
1686 skb->data_len -= pull_len;
1687 skb->tail += pull_len;
19861ce2
AD		 1688}
1689
42073d91
AD		 1690/**
1691 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1692 * @rx_ring: rx descriptor ring packet is being transacted on
1693 * @skb: pointer to current skb being updated
1694 *
1695 * This function provides a basic DMA sync up for the first fragment of an
1696 * skb. The reason for doing this is that the first fragment cannot be
1697 * unmapped until we have reached the end of packet descriptor for a buffer
1698 * chain.
1699 */
1700static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1701 struct sk_buff *skb)
1702{
1703 /* if the page was released unmap it, else just sync our portion */
1704 if (unlikely(IXGBE_CB(skb)->page_released)) {
1705 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1706 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1707 IXGBE_CB(skb)->page_released = false;
1708 } else {
1709 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1710
1711 dma_sync_single_range_for_cpu(rx_ring->dev,
1712 IXGBE_CB(skb)->dma,
1713 frag->page_offset,
1714 ixgbe_rx_bufsz(rx_ring),
1715 DMA_FROM_DEVICE);
1716 }
1717 IXGBE_CB(skb)->dma = 0;
1718}
1719
f800326d
AD		 1720/**
1721 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1722 * @rx_ring: rx descriptor ring packet is being transacted on
1723 * @rx_desc: pointer to the EOP Rx descriptor
1724 * @skb: pointer to current skb being fixed
1725 *
1726 * Check for corrupted packet headers caused by senders on the local L2
1727 * embedded NIC switch not setting up their Tx Descriptors right. These
1728 * should be very rare.
1729 *
1730 * Also address the case where we are pulling data in on pages only
1731 * and as such no data is present in the skb header.
1732 *
1733 * In addition if skb is not at least 60 bytes we need to pad it so that
1734 * it is large enough to qualify as a valid Ethernet frame.
1735 *
1736 * Returns true if an error was encountered and skb was freed.
1737 **/
1738static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1739 union ixgbe_adv_rx_desc *rx_desc,
1740 struct sk_buff *skb)
1741{
f800326d 1742 struct net_device *netdev = rx_ring->netdev;
f800326d
AD		 1743
1744 /* verify that the packet does not have any known errors */
1745 if (unlikely(ixgbe_test_staterr(rx_desc,
1746 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1747 !(netdev->features & NETIF_F_RXALL))) {
1748 dev_kfree_skb_any(skb);
1749 return true;
1750 }
1751
19861ce2 1752 /* place header in linear portion of buffer */
cf3fe7ac
AD		 1753 if (skb_is_nonlinear(skb))
1754 ixgbe_pull_tail(rx_ring, skb);
f800326d 1755
57efd44c
AD		 1756#ifdef IXGBE_FCOE
1757 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1758 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1759 return false;
1760
1761#endif
f800326d
AD		 1762 /* if skb_pad returns an error the skb was freed */
1763 if (unlikely(skb->len < 60)) {
1764 int pad_len = 60 - skb->len;
1765
1766 if (skb_pad(skb, pad_len))
1767 return true;
1768 __skb_put(skb, pad_len);
1769 }
1770
1771 return false;
1772}
1773
f800326d
AD		 1774/**
1775 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1776 * @rx_ring: rx descriptor ring to store buffers on
1777 * @old_buff: donor buffer to have page reused
1778 *
0549ae20 1779 * Synchronizes page for reuse by the adapter
f800326d
AD		 1780 **/
1781static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1782 struct ixgbe_rx_buffer *old_buff)
1783{
1784 struct ixgbe_rx_buffer *new_buff;
1785 u16 nta = rx_ring->next_to_alloc;
f800326d
AD		 1786
1787 new_buff = &rx_ring->rx_buffer_info[nta];
1788
1789 /* update, and store next to alloc */
1790 nta++;
1791 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1792
1793 /* transfer page from old buffer to new buffer */
1794 new_buff->page = old_buff->page;
1795 new_buff->dma = old_buff->dma;
0549ae20 1796 new_buff->page_offset = old_buff->page_offset;
f800326d
AD		 1797
1798 /* sync the buffer for use by the device */
1799 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
0549ae20
AD		 1800 new_buff->page_offset,
1801 ixgbe_rx_bufsz(rx_ring),
f800326d 1802 DMA_FROM_DEVICE);
f800326d
AD		 1803}
1804
1805/**
1806 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1807 * @rx_ring: rx descriptor ring to transact packets on
1808 * @rx_buffer: buffer containing page to add
1809 * @rx_desc: descriptor containing length of buffer written by hardware
1810 * @skb: sk_buff to place the data into
1811 *
0549ae20
AD		 1812 * This function will add the data contained in rx_buffer->page to the skb.
1813 * This is done either through a direct copy if the data in the buffer is
1814 * less than the skb header size, otherwise it will just attach the page as
1815 * a frag to the skb.
1816 *
1817 * The function will then update the page offset if necessary and return
1818 * true if the buffer can be reused by the adapter.
f800326d 1819 **/
0549ae20 1820static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
f800326d 1821 struct ixgbe_rx_buffer *rx_buffer,
0549ae20
AD		 1822 union ixgbe_adv_rx_desc *rx_desc,
1823 struct sk_buff *skb)
f800326d 1824{
0549ae20
AD		 1825 struct page *page = rx_buffer->page;
1826 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
09816fbe 1827#if (PAGE_SIZE < 8192)
0549ae20 1828 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
09816fbe
AD		 1829#else
1830 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1831 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1832 ixgbe_rx_bufsz(rx_ring);
1833#endif
0549ae20 1834
cf3fe7ac
AD		 1835 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1836 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1837
1838 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1839
1840 /* we can reuse buffer as-is, just make sure it is local */
1841 if (likely(page_to_nid(page) == numa_node_id()))
1842 return true;
1843
1844 /* this page cannot be reused so discard it */
1845 put_page(page);
1846 return false;
1847 }
1848
0549ae20
AD		 1849 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1850 rx_buffer->page_offset, size, truesize);
1851
09816fbe
AD		 1852 /* avoid re-using remote pages */
1853 if (unlikely(page_to_nid(page) != numa_node_id()))
1854 return false;
1855
1856#if (PAGE_SIZE < 8192)
1857 /* if we are only owner of page we can reuse it */
1858 if (unlikely(page_count(page) != 1))
0549ae20
AD		 1859 return false;
1860
1861 /* flip page offset to other buffer */
1862 rx_buffer->page_offset ^= truesize;
1863
09816fbe
AD		 1864 /*
1865 * since we are the only owner of the page and we need to
1866 * increment it, just set the value to 2 in order to avoid
1867 * an unecessary locked operation
1868 */
1869 atomic_set(&page->_count, 2);
1870#else
1871 /* move offset up to the next cache line */
1872 rx_buffer->page_offset += truesize;
1873
1874 if (rx_buffer->page_offset > last_offset)
1875 return false;
1876
0549ae20
AD		 1877 /* bump ref count on page before it is given to the stack */
1878 get_page(page);
09816fbe 1879#endif
0549ae20
AD		 1880
1881 return true;
f800326d
AD		 1882}
1883
18806c9e
AD		 1884static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
1885 union ixgbe_adv_rx_desc *rx_desc)
1886{
1887 struct ixgbe_rx_buffer *rx_buffer;
1888 struct sk_buff *skb;
1889 struct page *page;
1890
1891 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
1892 page = rx_buffer->page;
1893 prefetchw(page);
1894
1895 skb = rx_buffer->skb;
1896
1897 if (likely(!skb)) {
1898 void *page_addr = page_address(page) +
1899 rx_buffer->page_offset;
1900
1901 /* prefetch first cache line of first page */
1902 prefetch(page_addr);
1903#if L1_CACHE_BYTES < 128
1904 prefetch(page_addr + L1_CACHE_BYTES);
1905#endif
1906
1907 /* allocate a skb to store the frags */
1908 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1909 IXGBE_RX_HDR_SIZE);
1910 if (unlikely(!skb)) {
1911 rx_ring->rx_stats.alloc_rx_buff_failed++;
1912 return NULL;
1913 }
1914
1915 /*
1916 * we will be copying header into skb->data in
1917 * pskb_may_pull so it is in our interest to prefetch
1918 * it now to avoid a possible cache miss
1919 */
1920 prefetchw(skb->data);
1921
1922 /*
1923 * Delay unmapping of the first packet. It carries the
1924 * header information, HW may still access the header
1925 * after the writeback. Only unmap it when EOP is
1926 * reached
1927 */
1928 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1929 goto dma_sync;
1930
1931 IXGBE_CB(skb)->dma = rx_buffer->dma;
1932 } else {
1933 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
1934 ixgbe_dma_sync_frag(rx_ring, skb);
1935
1936dma_sync:
1937 /* we are reusing so sync this buffer for CPU use */
1938 dma_sync_single_range_for_cpu(rx_ring->dev,
1939 rx_buffer->dma,
1940 rx_buffer->page_offset,
1941 ixgbe_rx_bufsz(rx_ring),
1942 DMA_FROM_DEVICE);
1943 }
1944
1945 /* pull page into skb */
1946 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
1947 /* hand second half of page back to the ring */
1948 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
1949 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
1950 /* the page has been released from the ring */
1951 IXGBE_CB(skb)->page_released = true;
1952 } else {
1953 /* we are not reusing the buffer so unmap it */
1954 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
1955 ixgbe_rx_pg_size(rx_ring),
1956 DMA_FROM_DEVICE);
1957 }
1958
1959 /* clear contents of buffer_info */
1960 rx_buffer->skb = NULL;
1961 rx_buffer->dma = 0;
1962 rx_buffer->page = NULL;
1963
1964 return skb;
f800326d
AD		 1965}
1966
1967/**
1968 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
1969 * @q_vector: structure containing interrupt and ring information
1970 * @rx_ring: rx descriptor ring to transact packets on
1971 * @budget: Total limit on number of packets to process
1972 *
1973 * This function provides a "bounce buffer" approach to Rx interrupt
1974 * processing. The advantage to this is that on systems that have
1975 * expensive overhead for IOMMU access this provides a means of avoiding
1976 * it by maintaining the mapping of the page to the syste.
1977 *
5a85e737 1978 * Returns amount of work completed
f800326d 1979 **/
5a85e737 1980static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
e8e9f696 1981 struct ixgbe_ring *rx_ring,
f4de00ed 1982 const int budget)
9a799d71 1983{
d2f4fbe2 1984 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
3f2d1c0f 1985#ifdef IXGBE_FCOE
f800326d 1986 struct ixgbe_adapter *adapter = q_vector->adapter;
4ffdf91a
MR		 1987 int ddp_bytes;
1988 unsigned int mss = 0;
3d8fd385 1989#endif /* IXGBE_FCOE */
f800326d 1990 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
9a799d71 1991
f800326d 1992 do {
f800326d
AD		 1993 union ixgbe_adv_rx_desc *rx_desc;
1994 struct sk_buff *skb;
f800326d
AD		 1995
1996 /* return some buffers to hardware, one at a time is too slow */
1997 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1998 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1999 cleaned_count = 0;
2000 }
2001
18806c9e 2002 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
f800326d
AD		 2003
2004 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
2005 break;
9a799d71 2006
f800326d
AD		 2007 /*
2008 * This memory barrier is needed to keep us from reading
2009 * any other fields out of the rx_desc until we know the
2010 * RXD_STAT_DD bit is set
2011 */
2012 rmb();
9a799d71 2013
18806c9e
AD		 2014 /* retrieve a buffer from the ring */
2015 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
f800326d 2016
18806c9e
AD		 2017 /* exit if we failed to retrieve a buffer */
2018 if (!skb)
2019 break;
9a799d71 2020
9a799d71 2021 cleaned_count++;
f8212f97 2022
f800326d
AD		 2023 /* place incomplete frames back on ring for completion */
2024 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2025 continue;
c267fc16 2026
f800326d
AD		 2027 /* verify the packet layout is correct */
2028 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2029 continue;
9a799d71 2030
d2f4fbe2
AV		 2031 /* probably a little skewed due to removing CRC */
2032 total_rx_bytes += skb->len;
d2f4fbe2 2033
8a0da21b
AD		 2034 /* populate checksum, timestamp, VLAN, and protocol */
2035 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2036
332d4a7d
YZ		 2037#ifdef IXGBE_FCOE
2038 /* if ddp, not passing to ULD unless for FCP_RSP or error */
57efd44c 2039 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
f56e0cb1 2040 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
4ffdf91a
MR		 2041 /* include DDPed FCoE data */
2042 if (ddp_bytes > 0) {
2043 if (!mss) {
2044 mss = rx_ring->netdev->mtu -
2045 sizeof(struct fcoe_hdr) -
2046 sizeof(struct fc_frame_header) -
2047 sizeof(struct fcoe_crc_eof);
2048 if (mss > 512)
2049 mss &= ~511;
2050 }
2051 total_rx_bytes += ddp_bytes;
2052 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2053 mss);
2054 }
63d635b2
AD		 2055 if (!ddp_bytes) {
2056 dev_kfree_skb_any(skb);
f800326d 2057 continue;
63d635b2 2058 }
3d8fd385 2059 }
f800326d 2060
332d4a7d 2061#endif /* IXGBE_FCOE */
8b80cda5 2062 skb_mark_napi_id(skb, &q_vector->napi);
8a0da21b 2063 ixgbe_rx_skb(q_vector, skb);
9a799d71 2064
f800326d 2065 /* update budget accounting */
f4de00ed
AD		 2066 total_rx_packets++;
2067 } while (likely(total_rx_packets < budget));
9a799d71 2068
c267fc16
AD		 2069 u64_stats_update_begin(&rx_ring->syncp);
2070 rx_ring->stats.packets += total_rx_packets;
2071 rx_ring->stats.bytes += total_rx_bytes;
2072 u64_stats_update_end(&rx_ring->syncp);
bd198058
AD		 2073 q_vector->rx.total_packets += total_rx_packets;
2074 q_vector->rx.total_bytes += total_rx_bytes;
4ff7fb12 2075
f800326d
AD		 2076 if (cleaned_count)
2077 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2078
5a85e737 2079 return total_rx_packets;
9a799d71
AK		 2080}
2081
e0d1095a 2082#ifdef CONFIG_NET_RX_BUSY_POLL
5a85e737
ET		 2083/* must be called with local_bh_disable()d */
2084static int ixgbe_low_latency_recv(struct napi_struct *napi)
2085{
2086 struct ixgbe_q_vector *q_vector =
2087 container_of(napi, struct ixgbe_q_vector, napi);
2088 struct ixgbe_adapter *adapter = q_vector->adapter;
2089 struct ixgbe_ring *ring;
2090 int found = 0;
2091
2092 if (test_bit(__IXGBE_DOWN, &adapter->state))
2093 return LL_FLUSH_FAILED;
2094
2095 if (!ixgbe_qv_lock_poll(q_vector))
2096 return LL_FLUSH_BUSY;
2097
2098 ixgbe_for_each_ring(ring, q_vector->rx) {
2099 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
7e15b90f
ET		 2100#ifdef LL_EXTENDED_STATS
2101 if (found)
2102 ring->stats.cleaned += found;
2103 else
2104 ring->stats.misses++;
2105#endif
5a85e737
ET		 2106 if (found)
2107 break;
2108 }
2109
2110 ixgbe_qv_unlock_poll(q_vector);
2111
2112 return found;
2113}
e0d1095a 2114#endif /* CONFIG_NET_RX_BUSY_POLL */
5a85e737 2115
9a799d71
AK		 2116/**
2117 * ixgbe_configure_msix - Configure MSI-X hardware
2118 * @adapter: board private structure
2119 *
2120 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2121 * interrupts.
2122 **/
2123static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2124{
021230d4 2125 struct ixgbe_q_vector *q_vector;
49c7ffbe 2126 int v_idx;
021230d4 2127 u32 mask;
9a799d71 2128
8e34d1aa
AD		 2129 /* Populate MSIX to EITR Select */
2130 if (adapter->num_vfs > 32) {
2131 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2132 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2133 }
2134
4df10466
JB		 2135 /*
2136 * Populate the IVAR table and set the ITR values to the
021230d4
AV		 2137 * corresponding register.
2138 */
49c7ffbe 2139 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
efe3d3c8 2140 struct ixgbe_ring *ring;
7a921c93 2141 q_vector = adapter->q_vector[v_idx];
021230d4 2142
a557928e 2143 ixgbe_for_each_ring(ring, q_vector->rx)
efe3d3c8
AD		 2144 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2145
a557928e 2146 ixgbe_for_each_ring(ring, q_vector->tx)
efe3d3c8
AD		 2147 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2148
fe49f04a 2149 ixgbe_write_eitr(q_vector);
9a799d71
AK		 2150 }
2151
bd508178
AD		 2152 switch (adapter->hw.mac.type) {
2153 case ixgbe_mac_82598EB:
e8e26350 2154 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
e8e9f696 2155 v_idx);
bd508178
AD		 2156 break;
2157 case ixgbe_mac_82599EB:
b93a2226 2158 case ixgbe_mac_X540:
e8e26350 2159 ixgbe_set_ivar(adapter, -1, 1, v_idx);
bd508178 2160 break;
bd508178
AD		 2161 default:
2162 break;
2163 }
021230d4
AV		 2164 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2165
41fb9248 2166 /* set up to autoclear timer, and the vectors */
021230d4 2167 mask = IXGBE_EIMS_ENABLE_MASK;
d5bf4f67
ET		 2168 mask &= ~(IXGBE_EIMS_OTHER |
2169 IXGBE_EIMS_MAILBOX |
2170 IXGBE_EIMS_LSC);
2171
021230d4 2172 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
9a799d71
AK		 2173}
2174
f494e8fa
AV		 2175enum latency_range {
2176 lowest_latency = 0,
2177 low_latency = 1,
2178 bulk_latency = 2,
2179 latency_invalid = 255
2180};
2181
2182/**
2183 * ixgbe_update_itr - update the dynamic ITR value based on statistics
bd198058
AD		 2184 * @q_vector: structure containing interrupt and ring information
2185 * @ring_container: structure containing ring performance data
f494e8fa
AV		 2186 *
2187 * Stores a new ITR value based on packets and byte
2188 * counts during the last interrupt. The advantage of per interrupt
2189 * computation is faster updates and more accurate ITR for the current
2190 * traffic pattern. Constants in this function were computed
2191 * based on theoretical maximum wire speed and thresholds were set based
2192 * on testing data as well as attempting to minimize response time
2193 * while increasing bulk throughput.
2194 * this functionality is controlled by the InterruptThrottleRate module
2195 * parameter (see ixgbe_param.c)
2196 **/
bd198058
AD		 2197static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2198 struct ixgbe_ring_container *ring_container)
f494e8fa 2199{
bd198058
AD		 2200 int bytes = ring_container->total_bytes;
2201 int packets = ring_container->total_packets;
2202 u32 timepassed_us;
621bd70e 2203 u64 bytes_perint;
bd198058 2204 u8 itr_setting = ring_container->itr;
f494e8fa
AV		 2205
2206 if (packets == 0)
bd198058 2207 return;
f494e8fa
AV		 2208
2209 /* simple throttlerate management
621bd70e
AD		 2210 * 0-10MB/s lowest (100000 ints/s)
2211 * 10-20MB/s low (20000 ints/s)
2212 * 20-1249MB/s bulk (8000 ints/s)
f494e8fa
AV		 2213 */
2214 /* what was last interrupt timeslice? */
d5bf4f67 2215 timepassed_us = q_vector->itr >> 2;
bdbeefe8
DS		 2216 if (timepassed_us == 0)
2217 return;
2218
f494e8fa
AV		 2219 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2220
2221 switch (itr_setting) {
2222 case lowest_latency:
621bd70e 2223 if (bytes_perint > 10)
bd198058 2224 itr_setting = low_latency;
f494e8fa
AV		 2225 break;
2226 case low_latency:
621bd70e 2227 if (bytes_perint > 20)
bd198058 2228 itr_setting = bulk_latency;
621bd70e 2229 else if (bytes_perint <= 10)
bd198058 2230 itr_setting = lowest_latency;
f494e8fa
AV		 2231 break;
2232 case bulk_latency:
621bd70e 2233 if (bytes_perint <= 20)
bd198058 2234 itr_setting = low_latency;
f494e8fa
AV		 2235 break;
2236 }
2237
bd198058
AD		 2238 /* clear work counters since we have the values we need */
2239 ring_container->total_bytes = 0;
2240 ring_container->total_packets = 0;
2241
2242 /* write updated itr to ring container */
2243 ring_container->itr = itr_setting;
f494e8fa
AV		 2244}
2245
509ee935
JB		 2246/**
2247 * ixgbe_write_eitr - write EITR register in hardware specific way
fe49f04a 2248 * @q_vector: structure containing interrupt and ring information
509ee935
JB		 2249 *
2250 * This function is made to be called by ethtool and by the driver
2251 * when it needs to update EITR registers at runtime. Hardware
2252 * specific quirks/differences are taken care of here.
2253 */
fe49f04a 2254void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
509ee935 2255{
fe49f04a 2256 struct ixgbe_adapter *adapter = q_vector->adapter;
509ee935 2257 struct ixgbe_hw *hw = &adapter->hw;
fe49f04a 2258 int v_idx = q_vector->v_idx;
5d967eb7 2259 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
fe49f04a 2260
bd508178
AD		 2261 switch (adapter->hw.mac.type) {
2262 case ixgbe_mac_82598EB:
509ee935
JB		 2263 /* must write high and low 16 bits to reset counter */
2264 itr_reg |= (itr_reg << 16);
bd508178
AD		 2265 break;
2266 case ixgbe_mac_82599EB:
b93a2226 2267 case ixgbe_mac_X540:
509ee935
JB		 2268 /*
2269 * set the WDIS bit to not clear the timer bits and cause an
2270 * immediate assertion of the interrupt
2271 */
2272 itr_reg |= IXGBE_EITR_CNT_WDIS;
bd508178
AD		 2273 break;
2274 default:
2275 break;
509ee935
JB		 2276 }
2277 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2278}
2279
bd198058 2280static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
f494e8fa 2281{
d5bf4f67 2282 u32 new_itr = q_vector->itr;
bd198058 2283 u8 current_itr;
f494e8fa 2284
bd198058
AD		 2285 ixgbe_update_itr(q_vector, &q_vector->tx);
2286 ixgbe_update_itr(q_vector, &q_vector->rx);
f494e8fa 2287
08c8833b 2288 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
f494e8fa
AV		 2289
2290 switch (current_itr) {
2291 /* counts and packets in update_itr are dependent on these numbers */
2292 case lowest_latency:
d5bf4f67 2293 new_itr = IXGBE_100K_ITR;
f494e8fa
AV		 2294 break;
2295 case low_latency:
d5bf4f67 2296 new_itr = IXGBE_20K_ITR;
f494e8fa
AV		 2297 break;
2298 case bulk_latency:
d5bf4f67 2299 new_itr = IXGBE_8K_ITR;
f494e8fa 2300 break;
bd198058
AD		 2301 default:
2302 break;
f494e8fa
AV		 2303 }
2304
d5bf4f67 2305 if (new_itr != q_vector->itr) {
fe49f04a 2306 /* do an exponential smoothing */
d5bf4f67
ET		 2307 new_itr = (10 * new_itr * q_vector->itr) /
2308 ((9 * new_itr) + q_vector->itr);
509ee935 2309
bd198058 2310 /* save the algorithm value here */
5d967eb7 2311 q_vector->itr = new_itr;
fe49f04a
AD		 2312
2313 ixgbe_write_eitr(q_vector);
f494e8fa 2314 }
f494e8fa
AV		 2315}
2316
119fc60a 2317/**
de88eeeb 2318 * ixgbe_check_overtemp_subtask - check for over temperature
f0f9778d 2319 * @adapter: pointer to adapter
119fc60a 2320 **/
f0f9778d 2321static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
119fc60a 2322{
119fc60a
MC		 2323 struct ixgbe_hw *hw = &adapter->hw;
2324 u32 eicr = adapter->interrupt_event;
2325
f0f9778d 2326 if (test_bit(__IXGBE_DOWN, &adapter->state))
7ca647bd
JP		 2327 return;
2328
f0f9778d
AD		 2329 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2330 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2331 return;
2332
2333 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2334
7ca647bd 2335 switch (hw->device_id) {
f0f9778d
AD		 2336 case IXGBE_DEV_ID_82599_T3_LOM:
2337 /*
2338 * Since the warning interrupt is for both ports
2339 * we don't have to check if:
2340 * - This interrupt wasn't for our port.
2341 * - We may have missed the interrupt so always have to
2342 * check if we got a LSC
2343 */
2344 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
2345 !(eicr & IXGBE_EICR_LSC))
2346 return;
2347
2348 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
3d292265 2349 u32 speed;
f0f9778d 2350 bool link_up = false;
7ca647bd 2351
3d292265 2352 hw->mac.ops.check_link(hw, &speed, &link_up, false);
7ca647bd 2353
f0f9778d
AD		 2354 if (link_up)
2355 return;
2356 }
2357
2358 /* Check if this is not due to overtemp */
2359 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2360 return;
2361
2362 break;
7ca647bd
JP		 2363 default:
2364 if (!(eicr & IXGBE_EICR_GPI_SDP0))
119fc60a 2365 return;
7ca647bd 2366 break;
119fc60a 2367 }
7ca647bd
JP		 2368 e_crit(drv,
2369 "Network adapter has been stopped because it has over heated. "
2370 "Restart the computer. If the problem persists, "
2371 "power off the system and replace the adapter\n");
f0f9778d
AD		 2372
2373 adapter->interrupt_event = 0;
119fc60a
MC		 2374}
2375
0befdb3e
JB		 2376static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2377{
2378 struct ixgbe_hw *hw = &adapter->hw;
2379
2380 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2381 (eicr & IXGBE_EICR_GPI_SDP1)) {
396e799c 2382 e_crit(probe, "Fan has stopped, replace the adapter\n");
0befdb3e
JB		 2383 /* write to clear the interrupt */
2384 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2385 }
2386}
cf8280ee 2387
4f51bf70
JK		 2388static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2389{
2390 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2391 return;
2392
2393 switch (adapter->hw.mac.type) {
2394 case ixgbe_mac_82599EB:
2395 /*
2396 * Need to check link state so complete overtemp check
2397 * on service task
2398 */
2399 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
2400 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2401 adapter->interrupt_event = eicr;
2402 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2403 ixgbe_service_event_schedule(adapter);
2404 return;
2405 }
2406 return;
2407 case ixgbe_mac_X540:
2408 if (!(eicr & IXGBE_EICR_TS))
2409 return;
2410 break;
2411 default:
2412 return;
2413 }
2414
2415 e_crit(drv,
2416 "Network adapter has been stopped because it has over heated. "
2417 "Restart the computer. If the problem persists, "
2418 "power off the system and replace the adapter\n");
2419}
2420
e8e26350
PW		 2421static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2422{
2423 struct ixgbe_hw *hw = &adapter->hw;
2424
73c4b7cd
AD		 2425 if (eicr & IXGBE_EICR_GPI_SDP2) {
2426 /* Clear the interrupt */
2427 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
7086400d
AD		 2428 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2429 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2430 ixgbe_service_event_schedule(adapter);
2431 }
73c4b7cd
AD		 2432 }
2433
e8e26350
PW		 2434 if (eicr & IXGBE_EICR_GPI_SDP1) {
2435 /* Clear the interrupt */
2436 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
7086400d
AD		 2437 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2438 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2439 ixgbe_service_event_schedule(adapter);
2440 }
e8e26350
PW		 2441 }
2442}
2443
cf8280ee
JB		 2444static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2445{
2446 struct ixgbe_hw *hw = &adapter->hw;
2447
2448 adapter->lsc_int++;
2449 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2450 adapter->link_check_timeout = jiffies;
2451 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2452 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
8a0717f3 2453 IXGBE_WRITE_FLUSH(hw);
93c52dd0 2454 ixgbe_service_event_schedule(adapter);
cf8280ee
JB		 2455 }
2456}
2457
fe49f04a
AD		 2458static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2459 u64 qmask)
2460{
2461 u32 mask;
bd508178 2462 struct ixgbe_hw *hw = &adapter->hw;
fe49f04a 2463
bd508178
AD		 2464 switch (hw->mac.type) {
2465 case ixgbe_mac_82598EB:
fe49f04a 2466 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
bd508178
AD		 2467 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2468 break;
2469 case ixgbe_mac_82599EB:
b93a2226 2470 case ixgbe_mac_X540:
fe49f04a 2471 mask = (qmask & 0xFFFFFFFF);
bd508178
AD		 2472 if (mask)
2473 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
fe49f04a 2474 mask = (qmask >> 32);
bd508178
AD		 2475 if (mask)
2476 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2477 break;
2478 default:
2479 break;
fe49f04a
AD		 2480 }
2481 /* skip the flush */
2482}
2483
2484static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
e8e9f696 2485 u64 qmask)
fe49f04a
AD		 2486{
2487 u32 mask;
bd508178 2488 struct ixgbe_hw *hw = &adapter->hw;
fe49f04a 2489
bd508178
AD		 2490 switch (hw->mac.type) {
2491 case ixgbe_mac_82598EB:
fe49f04a 2492 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
bd508178
AD		 2493 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2494 break;
2495 case ixgbe_mac_82599EB:
b93a2226 2496 case ixgbe_mac_X540:
fe49f04a 2497 mask = (qmask & 0xFFFFFFFF);
bd508178
AD		 2498 if (mask)
2499 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
fe49f04a 2500 mask = (qmask >> 32);
bd508178
AD		 2501 if (mask)
2502 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2503 break;
2504 default:
2505 break;
fe49f04a
AD		 2506 }
2507 /* skip the flush */
2508}
2509
021230d4 2510/**
2c4af694
AD		 2511 * ixgbe_irq_enable - Enable default interrupt generation settings
2512 * @adapter: board private structure
021230d4 2513 **/
2c4af694
AD		 2514static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2515 bool flush)
9a799d71 2516{
2c4af694 2517 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
9a799d71 2518
2c4af694
AD		 2519 /* don't reenable LSC while waiting for link */
2520 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2521 mask &= ~IXGBE_EIMS_LSC;
9a799d71 2522
2c4af694 2523 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
4f51bf70
JK		 2524 switch (adapter->hw.mac.type) {
2525 case ixgbe_mac_82599EB:
2526 mask |= IXGBE_EIMS_GPI_SDP0;
2527 break;
2528 case ixgbe_mac_X540:
2529 mask |= IXGBE_EIMS_TS;
2530 break;
2531 default:
2532 break;
2533 }
2c4af694
AD		 2534 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2535 mask |= IXGBE_EIMS_GPI_SDP1;
2536 switch (adapter->hw.mac.type) {
2537 case ixgbe_mac_82599EB:
2c4af694
AD		 2538 mask |= IXGBE_EIMS_GPI_SDP1;
2539 mask |= IXGBE_EIMS_GPI_SDP2;
858bc081
DS		 2540 case ixgbe_mac_X540:
2541 mask |= IXGBE_EIMS_ECC;
2c4af694
AD		 2542 mask |= IXGBE_EIMS_MAILBOX;
2543 break;
2544 default:
2545 break;
9a799d71 2546 }
db0677fa 2547
db0677fa
JK		 2548 if (adapter->hw.mac.type == ixgbe_mac_X540)
2549 mask |= IXGBE_EIMS_TIMESYNC;
db0677fa 2550
2c4af694
AD		 2551 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2552 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2553 mask |= IXGBE_EIMS_FLOW_DIR;
9a799d71 2554
2c4af694
AD		 2555 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2556 if (queues)
2557 ixgbe_irq_enable_queues(adapter, ~0);
2558 if (flush)
2559 IXGBE_WRITE_FLUSH(&adapter->hw);
9a799d71
AK		 2560}
2561
2c4af694 2562static irqreturn_t ixgbe_msix_other(int irq, void *data)
f0848276 2563{
a65151ba 2564 struct ixgbe_adapter *adapter = data;
9a799d71 2565 struct ixgbe_hw *hw = &adapter->hw;
54037505 2566 u32 eicr;
91281fd3 2567
54037505
DS		 2568 /*
2569 * Workaround for Silicon errata. Use clear-by-write instead
2570 * of clear-by-read. Reading with EICS will return the
2571 * interrupt causes without clearing, which later be done
2572 * with the write to EICR.
2573 */
2574 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
d87d8307
JK		 2575
2576 /* The lower 16bits of the EICR register are for the queue interrupts
2577 * which should be masked here in order to not accidently clear them if
2578 * the bits are high when ixgbe_msix_other is called. There is a race
2579 * condition otherwise which results in possible performance loss
2580 * especially if the ixgbe_msix_other interrupt is triggering
2581 * consistently (as it would when PPS is turned on for the X540 device)
2582 */
2583 eicr &= 0xFFFF0000;
2584
54037505 2585 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
33cf09c9 2586
cf8280ee
JB		 2587 if (eicr & IXGBE_EICR_LSC)
2588 ixgbe_check_lsc(adapter);
f0848276 2589
1cdd1ec8
GR		 2590 if (eicr & IXGBE_EICR_MAILBOX)
2591 ixgbe_msg_task(adapter);
efe3d3c8 2592
bd508178
AD		 2593 switch (hw->mac.type) {
2594 case ixgbe_mac_82599EB:
b93a2226 2595 case ixgbe_mac_X540:
2c4af694
AD		 2596 if (eicr & IXGBE_EICR_ECC)
2597 e_info(link, "Received unrecoverable ECC Err, please "
2598 "reboot\n");
c4cf55e5
PWJ		 2599 /* Handle Flow Director Full threshold interrupt */
2600 if (eicr & IXGBE_EICR_FLOW_DIR) {
d034acf1 2601 int reinit_count = 0;
c4cf55e5 2602 int i;
c4cf55e5 2603 for (i = 0; i < adapter->num_tx_queues; i++) {
d034acf1 2604 struct ixgbe_ring *ring = adapter->tx_ring[i];
7d637bcc 2605 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
d034acf1
AD		 2606 &ring->state))
2607 reinit_count++;
2608 }
2609 if (reinit_count) {
2610 /* no more flow director interrupts until after init */
2611 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
d034acf1
AD		 2612 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2613 ixgbe_service_event_schedule(adapter);
c4cf55e5
PWJ		 2614 }
2615 }
f0f9778d 2616 ixgbe_check_sfp_event(adapter, eicr);
4f51bf70 2617 ixgbe_check_overtemp_event(adapter, eicr);
bd508178
AD		 2618 break;
2619 default:
2620 break;
c4cf55e5 2621 }
f0848276 2622
bd508178 2623 ixgbe_check_fan_failure(adapter, eicr);
db0677fa 2624
db0677fa
JK		 2625 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2626 ixgbe_ptp_check_pps_event(adapter, eicr);
efe3d3c8 2627
7086400d 2628 /* re-enable the original interrupt state, no lsc, no queues */
d4f80882 2629 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2c4af694 2630 ixgbe_irq_enable(adapter, false, false);
f0848276 2631
9a799d71 2632 return IRQ_HANDLED;
f0848276 2633}
91281fd3 2634
4ff7fb12 2635static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
91281fd3 2636{
021230d4 2637 struct ixgbe_q_vector *q_vector = data;
91281fd3 2638
9b471446 2639 /* EIAM disabled interrupts (on this vector) for us */
91281fd3 2640
4ff7fb12
AD		 2641 if (q_vector->rx.ring || q_vector->tx.ring)
2642 napi_schedule(&q_vector->napi);
91281fd3 2643
9a799d71 2644 return IRQ_HANDLED;
91281fd3
AD		 2645}
2646
eb01b975
AD		 2647/**
2648 * ixgbe_poll - NAPI Rx polling callback
2649 * @napi: structure for representing this polling device
2650 * @budget: how many packets driver is allowed to clean
2651 *
2652 * This function is used for legacy and MSI, NAPI mode
2653 **/
8af3c33f 2654int ixgbe_poll(struct napi_struct *napi, int budget)
eb01b975
AD		 2655{
2656 struct ixgbe_q_vector *q_vector =
2657 container_of(napi, struct ixgbe_q_vector, napi);
2658 struct ixgbe_adapter *adapter = q_vector->adapter;
2659 struct ixgbe_ring *ring;
2660 int per_ring_budget;
2661 bool clean_complete = true;
2662
2663#ifdef CONFIG_IXGBE_DCA
2664 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2665 ixgbe_update_dca(q_vector);
2666#endif
2667
2668 ixgbe_for_each_ring(ring, q_vector->tx)
2669 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
2670
5a85e737
ET		 2671 if (!ixgbe_qv_lock_napi(q_vector))
2672 return budget;
2673
eb01b975
AD		 2674 /* attempt to distribute budget to each queue fairly, but don't allow
2675 * the budget to go below 1 because we'll exit polling */
2676 if (q_vector->rx.count > 1)
2677 per_ring_budget = max(budget/q_vector->rx.count, 1);
2678 else
2679 per_ring_budget = budget;
2680
2681 ixgbe_for_each_ring(ring, q_vector->rx)
5a85e737
ET		 2682 clean_complete &= (ixgbe_clean_rx_irq(q_vector, ring,
2683 per_ring_budget) < per_ring_budget);
eb01b975 2684
5a85e737 2685 ixgbe_qv_unlock_napi(q_vector);
eb01b975
AD		 2686 /* If all work not completed, return budget and keep polling */
2687 if (!clean_complete)
2688 return budget;
2689
2690 /* all work done, exit the polling mode */
2691 napi_complete(napi);
2692 if (adapter->rx_itr_setting & 1)
2693 ixgbe_set_itr(q_vector);
2694 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2695 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2696
2697 return 0;
2698}
2699
021230d4
AV		 2700/**
2701 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2702 * @adapter: board private structure
2703 *
2704 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2705 * interrupts from the kernel.
2706 **/
2707static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2708{
2709 struct net_device *netdev = adapter->netdev;
207867f5 2710 int vector, err;
e8e9f696 2711 int ri = 0, ti = 0;
021230d4 2712
49c7ffbe 2713 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
d0759ebb 2714 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
207867f5 2715 struct msix_entry *entry = &adapter->msix_entries[vector];
cb13fc20 2716
4ff7fb12 2717 if (q_vector->tx.ring && q_vector->rx.ring) {
9fe93afd 2718 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
4ff7fb12
AD		 2719 "%s-%s-%d", netdev->name, "TxRx", ri++);
2720 ti++;
2721 } else if (q_vector->rx.ring) {
9fe93afd 2722 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
4ff7fb12
AD		 2723 "%s-%s-%d", netdev->name, "rx", ri++);
2724 } else if (q_vector->tx.ring) {
9fe93afd 2725 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
4ff7fb12 2726 "%s-%s-%d", netdev->name, "tx", ti++);
d0759ebb
AD		 2727 } else {
2728 /* skip this unused q_vector */
2729 continue;
32aa77a4 2730 }
207867f5
AD		 2731 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2732 q_vector->name, q_vector);
9a799d71 2733 if (err) {
396e799c 2734 e_err(probe, "request_irq failed for MSIX interrupt "
849c4542 2735 "Error: %d\n", err);
021230d4 2736 goto free_queue_irqs;
9a799d71 2737 }
207867f5
AD		 2738 /* If Flow Director is enabled, set interrupt affinity */
2739 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2740 /* assign the mask for this irq */
2741 irq_set_affinity_hint(entry->vector,
de88eeeb 2742 &q_vector->affinity_mask);
207867f5 2743 }
9a799d71
AK		 2744 }
2745
021230d4 2746 err = request_irq(adapter->msix_entries[vector].vector,
2c4af694 2747 ixgbe_msix_other, 0, netdev->name, adapter);
9a799d71 2748 if (err) {
de88eeeb 2749 e_err(probe, "request_irq for msix_other failed: %d\n", err);
021230d4 2750 goto free_queue_irqs;
9a799d71
AK		 2751 }
2752
9a799d71
AK		 2753 return 0;
2754
021230d4 2755free_queue_irqs:
207867f5
AD		 2756 while (vector) {
2757 vector--;
2758 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2759 NULL);
2760 free_irq(adapter->msix_entries[vector].vector,
2761 adapter->q_vector[vector]);
2762 }
021230d4
AV		 2763 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2764 pci_disable_msix(adapter->pdev);
9a799d71
AK		 2765 kfree(adapter->msix_entries);
2766 adapter->msix_entries = NULL;
9a799d71
AK		 2767 return err;
2768}
2769
2770/**
021230d4 2771 * ixgbe_intr - legacy mode Interrupt Handler
9a799d71
AK		 2772 * @irq: interrupt number
2773 * @data: pointer to a network interface device structure
9a799d71
AK		 2774 **/
2775static irqreturn_t ixgbe_intr(int irq, void *data)
2776{
a65151ba 2777 struct ixgbe_adapter *adapter = data;
9a799d71 2778 struct ixgbe_hw *hw = &adapter->hw;
7a921c93 2779 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
9a799d71
AK		 2780 u32 eicr;
2781
54037505 2782 /*
24ddd967 2783 * Workaround for silicon errata #26 on 82598. Mask the interrupt
54037505
DS		 2784 * before the read of EICR.
2785 */
2786 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2787
021230d4 2788 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
52f33af8 2789 * therefore no explicit interrupt disable is necessary */
021230d4 2790 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
f47cf66e 2791 if (!eicr) {
6af3b9eb
ET		 2792 /*
2793 * shared interrupt alert!
f47cf66e 2794 * make sure interrupts are enabled because the read will
6af3b9eb
ET		 2795 * have disabled interrupts due to EIAM
2796 * finish the workaround of silicon errata on 82598. Unmask
2797 * the interrupt that we masked before the EICR read.
2798 */
2799 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2800 ixgbe_irq_enable(adapter, true, true);
9a799d71 2801 return IRQ_NONE; /* Not our interrupt */
f47cf66e 2802 }
9a799d71 2803
cf8280ee
JB		 2804 if (eicr & IXGBE_EICR_LSC)
2805 ixgbe_check_lsc(adapter);
021230d4 2806
bd508178
AD		 2807 switch (hw->mac.type) {
2808 case ixgbe_mac_82599EB:
e8e26350 2809 ixgbe_check_sfp_event(adapter, eicr);
0ccb974d
DS		 2810 /* Fall through */
2811 case ixgbe_mac_X540:
2812 if (eicr & IXGBE_EICR_ECC)
2813 e_info(link, "Received unrecoverable ECC err, please "
2814 "reboot\n");
4f51bf70 2815 ixgbe_check_overtemp_event(adapter, eicr);
bd508178
AD		 2816 break;
2817 default:
2818 break;
2819 }
e8e26350 2820
0befdb3e 2821 ixgbe_check_fan_failure(adapter, eicr);
db0677fa
JK		 2822 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2823 ixgbe_ptp_check_pps_event(adapter, eicr);
0befdb3e 2824
b9f6ed2b
AD		 2825 /* would disable interrupts here but EIAM disabled it */
2826 napi_schedule(&q_vector->napi);
9a799d71 2827
6af3b9eb
ET		 2828 /*
2829 * re-enable link(maybe) and non-queue interrupts, no flush.
2830 * ixgbe_poll will re-enable the queue interrupts
2831 */
6af3b9eb
ET		 2832 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2833 ixgbe_irq_enable(adapter, false, false);
2834
9a799d71
AK		 2835 return IRQ_HANDLED;
2836}
2837
2838/**
2839 * ixgbe_request_irq - initialize interrupts
2840 * @adapter: board private structure
2841 *
2842 * Attempts to configure interrupts using the best available
2843 * capabilities of the hardware and kernel.
2844 **/
021230d4 2845static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
9a799d71
AK		 2846{
2847 struct net_device *netdev = adapter->netdev;
021230d4 2848 int err;
9a799d71 2849
4cc6df29 2850 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
021230d4 2851 err = ixgbe_request_msix_irqs(adapter);
4cc6df29 2852 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
a0607fd3 2853 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
a65151ba 2854 netdev->name, adapter);
4cc6df29 2855 else
a0607fd3 2856 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
a65151ba 2857 netdev->name, adapter);
9a799d71 2858
de88eeeb 2859 if (err)
396e799c 2860 e_err(probe, "request_irq failed, Error %d\n", err);
9a799d71 2861
9a799d71
AK		 2862 return err;
2863}
2864
2865static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2866{
49c7ffbe 2867 int vector;
9a799d71 2868
49c7ffbe
AD		 2869 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2870 free_irq(adapter->pdev->irq, adapter);
2871 return;
2872 }
4cc6df29 2873
49c7ffbe
AD		 2874 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2875 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2876 struct msix_entry *entry = &adapter->msix_entries[vector];
894ff7cf 2877
49c7ffbe
AD		 2878 /* free only the irqs that were actually requested */
2879 if (!q_vector->rx.ring && !q_vector->tx.ring)
2880 continue;
207867f5 2881
49c7ffbe
AD		 2882 /* clear the affinity_mask in the IRQ descriptor */
2883 irq_set_affinity_hint(entry->vector, NULL);
2884
2885 free_irq(entry->vector, q_vector);
9a799d71 2886 }
49c7ffbe
AD		 2887
2888 free_irq(adapter->msix_entries[vector++].vector, adapter);
9a799d71
AK		 2889}
2890
22d5a71b
JB		 2891/**
2892 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2893 * @adapter: board private structure
2894 **/
2895static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2896{
bd508178
AD		 2897 switch (adapter->hw.mac.type) {
2898 case ixgbe_mac_82598EB:
835462fc 2899 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
bd508178
AD		 2900 break;
2901 case ixgbe_mac_82599EB:
b93a2226 2902 case ixgbe_mac_X540:
835462fc
NS		 2903 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2904 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
22d5a71b 2905 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
bd508178
AD		 2906 break;
2907 default:
2908 break;
22d5a71b
JB		 2909 }
2910 IXGBE_WRITE_FLUSH(&adapter->hw);
2911 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
49c7ffbe
AD		 2912 int vector;
2913
2914 for (vector = 0; vector < adapter->num_q_vectors; vector++)
2915 synchronize_irq(adapter->msix_entries[vector].vector);
2916
2917 synchronize_irq(adapter->msix_entries[vector++].vector);
22d5a71b
JB		 2918 } else {
2919 synchronize_irq(adapter->pdev->irq);
2920 }
2921}
2922
9a799d71
AK		 2923/**
2924 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2925 *
2926 **/
2927static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2928{
d5bf4f67 2929 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
9a799d71 2930
d5bf4f67 2931 ixgbe_write_eitr(q_vector);
9a799d71 2932
e8e26350
PW		 2933 ixgbe_set_ivar(adapter, 0, 0, 0);
2934 ixgbe_set_ivar(adapter, 1, 0, 0);
021230d4 2935
396e799c 2936 e_info(hw, "Legacy interrupt IVAR setup done\n");
9a799d71
AK		 2937}
2938
43e69bf0
AD		 2939/**
2940 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2941 * @adapter: board private structure
2942 * @ring: structure containing ring specific data
2943 *
2944 * Configure the Tx descriptor ring after a reset.
2945 **/
84418e3b
AD		 2946void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2947 struct ixgbe_ring *ring)
43e69bf0
AD		 2948{
2949 struct ixgbe_hw *hw = &adapter->hw;
2950 u64 tdba = ring->dma;
2f1860b8 2951 int wait_loop = 10;
b88c6de2 2952 u32 txdctl = IXGBE_TXDCTL_ENABLE;
bf29ee6c 2953 u8 reg_idx = ring->reg_idx;
43e69bf0 2954
2f1860b8 2955 /* disable queue to avoid issues while updating state */
b88c6de2 2956 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2f1860b8
AD		 2957 IXGBE_WRITE_FLUSH(hw);
2958
43e69bf0 2959 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
e8e9f696 2960 (tdba & DMA_BIT_MASK(32)));
43e69bf0
AD		 2961 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2962 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2963 ring->count * sizeof(union ixgbe_adv_tx_desc));
2964 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2965 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
84ea2591 2966 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
43e69bf0 2967
b88c6de2
AD		 2968 /*
2969 * set WTHRESH to encourage burst writeback, it should not be set
67da097e
ET		 2970 * higher than 1 when:
2971 * - ITR is 0 as it could cause false TX hangs
2972 * - ITR is set to > 100k int/sec and BQL is enabled
b88c6de2
AD		 2973 *
2974 * In order to avoid issues WTHRESH + PTHRESH should always be equal
2975 * to or less than the number of on chip descriptors, which is
2976 * currently 40.
2977 */
67da097e
ET		 2978#if IS_ENABLED(CONFIG_BQL)
2979 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
2980#else
e954b374 2981 if (!ring->q_vector || (ring->q_vector->itr < 8))
67da097e 2982#endif
b88c6de2
AD		 2983 txdctl |= (1 << 16); /* WTHRESH = 1 */
2984 else
2985 txdctl |= (8 << 16); /* WTHRESH = 8 */
2986
e954b374
AD		 2987 /*
2988 * Setting PTHRESH to 32 both improves performance
2989 * and avoids a TX hang with DFP enabled
2990 */
b88c6de2
AD		 2991 txdctl |= (1 << 8) | /* HTHRESH = 1 */
2992 32; /* PTHRESH = 32 */
2f1860b8
AD		 2993
2994 /* reinitialize flowdirector state */
39cb681b 2995 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
ee9e0f0b
AD		 2996 ring->atr_sample_rate = adapter->atr_sample_rate;
2997 ring->atr_count = 0;
2998 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2999 } else {
3000 ring->atr_sample_rate = 0;
3001 }
2f1860b8 3002
fd786b7b
AD		 3003 /* initialize XPS */
3004 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3005 struct ixgbe_q_vector *q_vector = ring->q_vector;
3006
3007 if (q_vector)
3008 netif_set_xps_queue(adapter->netdev,
3009 &q_vector->affinity_mask,
3010 ring->queue_index);
3011 }
3012
c84d324c
JF		 3013 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3014
2f1860b8 3015 /* enable queue */
2f1860b8
AD		 3016 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3017
3018 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3019 if (hw->mac.type == ixgbe_mac_82598EB &&
3020 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3021 return;
3022
3023 /* poll to verify queue is enabled */
3024 do {
032b4325 3025 usleep_range(1000, 2000);
2f1860b8
AD		 3026 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3027 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3028 if (!wait_loop)
3029 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
43e69bf0
AD		 3030}
3031
120ff942
AD		 3032static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3033{
3034 struct ixgbe_hw *hw = &adapter->hw;
671c0adb 3035 u32 rttdcs, mtqc;
8b1c0b24 3036 u8 tcs = netdev_get_num_tc(adapter->netdev);
120ff942
AD		 3037
3038 if (hw->mac.type == ixgbe_mac_82598EB)
3039 return;
3040
3041 /* disable the arbiter while setting MTQC */
3042 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3043 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3044 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3045
3046 /* set transmit pool layout */
671c0adb
AD		 3047 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3048 mtqc = IXGBE_MTQC_VT_ENA;
3049 if (tcs > 4)
3050 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3051 else if (tcs > 1)
3052 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3053 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3054 mtqc |= IXGBE_MTQC_32VF;
3055 else
3056 mtqc |= IXGBE_MTQC_64VF;
3057 } else {
3058 if (tcs > 4)
3059 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3060 else if (tcs > 1)
3061 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
8b1c0b24 3062 else
671c0adb
AD		 3063 mtqc = IXGBE_MTQC_64Q_1PB;
3064 }
120ff942 3065
671c0adb 3066 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
120ff942 3067
671c0adb
AD		 3068 /* Enable Security TX Buffer IFG for multiple pb */
3069 if (tcs) {
3070 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3071 sectx |= IXGBE_SECTX_DCB;
3072 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
120ff942
AD		 3073 }
3074
3075 /* re-enable the arbiter */
3076 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3077 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3078}
3079
9a799d71 3080/**
3a581073 3081 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
9a799d71
AK		 3082 * @adapter: board private structure
3083 *
3084 * Configure the Tx unit of the MAC after a reset.
3085 **/
3086static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3087{
2f1860b8
AD		 3088 struct ixgbe_hw *hw = &adapter->hw;
3089 u32 dmatxctl;
43e69bf0 3090 u32 i;
9a799d71 3091
2f1860b8
AD		 3092 ixgbe_setup_mtqc(adapter);
3093
3094 if (hw->mac.type != ixgbe_mac_82598EB) {
3095 /* DMATXCTL.EN must be before Tx queues are enabled */
3096 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3097 dmatxctl |= IXGBE_DMATXCTL_TE;
3098 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3099 }
3100
9a799d71 3101 /* Setup the HW Tx Head and Tail descriptor pointers */
43e69bf0
AD		 3102 for (i = 0; i < adapter->num_tx_queues; i++)
3103 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
9a799d71
AK		 3104}
3105
3ebe8fde
AD		 3106static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3107 struct ixgbe_ring *ring)
3108{
3109 struct ixgbe_hw *hw = &adapter->hw;
3110 u8 reg_idx = ring->reg_idx;
3111 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3112
3113 srrctl |= IXGBE_SRRCTL_DROP_EN;
3114
3115 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3116}
3117
3118static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3119 struct ixgbe_ring *ring)
3120{
3121 struct ixgbe_hw *hw = &adapter->hw;
3122 u8 reg_idx = ring->reg_idx;
3123 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3124
3125 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3126
3127 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3128}
3129
3130#ifdef CONFIG_IXGBE_DCB
3131void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3132#else
3133static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3134#endif
3135{
3136 int i;
3137 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3138
3139 if (adapter->ixgbe_ieee_pfc)
3140 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3141
3142 /*
3143 * We should set the drop enable bit if:
3144 * SR-IOV is enabled
3145 * or
3146 * Number of Rx queues > 1 and flow control is disabled
3147 *
3148 * This allows us to avoid head of line blocking for security
3149 * and performance reasons.
3150 */
3151 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3152 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3153 for (i = 0; i < adapter->num_rx_queues; i++)
3154 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3155 } else {
3156 for (i = 0; i < adapter->num_rx_queues; i++)
3157 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3158 }
3159}
3160
e8e26350 3161#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
cc41ac7c 3162
a6616b42 3163static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
e8e9f696 3164 struct ixgbe_ring *rx_ring)
cc41ac7c 3165{
45e9baa5 3166 struct ixgbe_hw *hw = &adapter->hw;
cc41ac7c 3167 u32 srrctl;
bf29ee6c 3168 u8 reg_idx = rx_ring->reg_idx;
3be1adfb 3169
45e9baa5
AD		 3170 if (hw->mac.type == ixgbe_mac_82598EB) {
3171 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
cc41ac7c 3172
45e9baa5
AD		 3173 /*
3174 * if VMDq is not active we must program one srrctl register
3175 * per RSS queue since we have enabled RDRXCTL.MVMEN
3176 */
3177 reg_idx &= mask;
3178 }
cc41ac7c 3179
45e9baa5
AD		 3180 /* configure header buffer length, needed for RSC */
3181 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
afafd5b0 3182
45e9baa5 3183 /* configure the packet buffer length */
f800326d 3184 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
45e9baa5
AD		 3185
3186 /* configure descriptor type */
f800326d 3187 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
e8e26350 3188
45e9baa5 3189 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
cc41ac7c 3190}
9a799d71 3191
05abb126 3192static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
0cefafad 3193{
05abb126
AD		 3194 struct ixgbe_hw *hw = &adapter->hw;
3195 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
e8e9f696
JP		 3196 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
3197 0x6A3E67EA, 0x14364D17, 0x3BED200D};
05abb126
AD		 3198 u32 mrqc = 0, reta = 0;
3199 u32 rxcsum;
3200 int i, j;
671c0adb
AD		 3201 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3202
671c0adb
AD		 3203 /*
3204 * Program table for at least 2 queues w/ SR-IOV so that VFs can
3205 * make full use of any rings they may have. We will use the
3206 * PSRTYPE register to control how many rings we use within the PF.
3207 */
3208 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3209 rss_i = 2;
0cefafad 3210
05abb126
AD		 3211 /* Fill out hash function seeds */
3212 for (i = 0; i < 10; i++)
3213 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
3214
3215 /* Fill out redirection table */
3216 for (i = 0, j = 0; i < 128; i++, j++) {
671c0adb 3217 if (j == rss_i)
05abb126
AD		 3218 j = 0;
3219 /* reta = 4-byte sliding window of
3220 * 0x00..(indices-1)(indices-1)00..etc. */
3221 reta = (reta << 8) | (j * 0x11);
3222 if ((i & 3) == 3)
3223 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3224 }
0cefafad 3225
05abb126
AD		 3226 /* Disable indicating checksum in descriptor, enables RSS hash */
3227 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3228 rxcsum |= IXGBE_RXCSUM_PCSD;
3229 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3230
671c0adb 3231 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
fbe7ca7f 3232 if (adapter->ring_feature[RING_F_RSS].mask)
671c0adb 3233 mrqc = IXGBE_MRQC_RSSEN;
8b1c0b24 3234 } else {
671c0adb
AD		 3235 u8 tcs = netdev_get_num_tc(adapter->netdev);
3236
3237 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3238 if (tcs > 4)
3239 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3240 else if (tcs > 1)
3241 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3242 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3243 mrqc = IXGBE_MRQC_VMDQRSS32EN;
8b1c0b24 3244 else
671c0adb
AD		 3245 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3246 } else {
3247 if (tcs > 4)
8b1c0b24 3248 mrqc = IXGBE_MRQC_RTRSS8TCEN;
671c0adb
AD		 3249 else if (tcs > 1)
3250 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3251 else
3252 mrqc = IXGBE_MRQC_RSSEN;
8b1c0b24 3253 }
0cefafad
JB		 3254 }
3255
05abb126 3256 /* Perform hash on these packet types */
671c0adb
AD		 3257 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3258 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3259 IXGBE_MRQC_RSS_FIELD_IPV6 |
3260 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
05abb126 3261
ef6afc0c
AD		 3262 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3263 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3264 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3265 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3266
05abb126 3267 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
0cefafad
JB		 3268}
3269
bb5a9ad2
NS		 3270/**
3271 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3272 * @adapter: address of board private structure
3273 * @index: index of ring to set
bb5a9ad2 3274 **/
082757af 3275static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
7367096a 3276 struct ixgbe_ring *ring)
bb5a9ad2 3277{
bb5a9ad2 3278 struct ixgbe_hw *hw = &adapter->hw;
bb5a9ad2 3279 u32 rscctrl;
bf29ee6c 3280 u8 reg_idx = ring->reg_idx;
7367096a 3281
7d637bcc 3282 if (!ring_is_rsc_enabled(ring))
7367096a 3283 return;
bb5a9ad2 3284
7367096a 3285 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
bb5a9ad2
NS		 3286 rscctrl |= IXGBE_RSCCTL_RSCEN;
3287 /*
3288 * we must limit the number of descriptors so that the
3289 * total size of max desc * buf_len is not greater
642c680e 3290 * than 65536
bb5a9ad2 3291 */
f800326d 3292 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
7367096a 3293 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
bb5a9ad2
NS		 3294}
3295
9e10e045
AD		 3296#define IXGBE_MAX_RX_DESC_POLL 10
3297static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3298 struct ixgbe_ring *ring)
3299{
3300 struct ixgbe_hw *hw = &adapter->hw;
9e10e045
AD		 3301 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3302 u32 rxdctl;
bf29ee6c 3303 u8 reg_idx = ring->reg_idx;
9e10e045
AD		 3304
3305 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3306 if (hw->mac.type == ixgbe_mac_82598EB &&
3307 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3308 return;
3309
3310 do {
032b4325 3311 usleep_range(1000, 2000);
9e10e045
AD		 3312 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3313 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3314
3315 if (!wait_loop) {
3316 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3317 "the polling period\n", reg_idx);
3318 }
3319}
3320
2d39d576
YZ		 3321void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3322 struct ixgbe_ring *ring)
3323{
3324 struct ixgbe_hw *hw = &adapter->hw;
3325 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3326 u32 rxdctl;
3327 u8 reg_idx = ring->reg_idx;
3328
3329 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3330 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3331
3332 /* write value back with RXDCTL.ENABLE bit cleared */
3333 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3334
3335 if (hw->mac.type == ixgbe_mac_82598EB &&
3336 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3337 return;
3338
3339 /* the hardware may take up to 100us to really disable the rx queue */
3340 do {
3341 udelay(10);
3342 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3343 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3344
3345 if (!wait_loop) {
3346 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3347 "the polling period\n", reg_idx);
3348 }
3349}
3350
84418e3b
AD		 3351void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3352 struct ixgbe_ring *ring)
acd37177
AD		 3353{
3354 struct ixgbe_hw *hw = &adapter->hw;
3355 u64 rdba = ring->dma;
9e10e045 3356 u32 rxdctl;
bf29ee6c 3357 u8 reg_idx = ring->reg_idx;
acd37177 3358
9e10e045
AD		 3359 /* disable queue to avoid issues while updating state */
3360 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2d39d576 3361 ixgbe_disable_rx_queue(adapter, ring);
9e10e045 3362
acd37177
AD		 3363 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3364 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3365 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3366 ring->count * sizeof(union ixgbe_adv_rx_desc));
3367 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3368 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
84ea2591 3369 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
9e10e045
AD		 3370
3371 ixgbe_configure_srrctl(adapter, ring);
3372 ixgbe_configure_rscctl(adapter, ring);
3373
3374 if (hw->mac.type == ixgbe_mac_82598EB) {
3375 /*
3376 * enable cache line friendly hardware writes:
3377 * PTHRESH=32 descriptors (half the internal cache),
3378 * this also removes ugly rx_no_buffer_count increment
3379 * HTHRESH=4 descriptors (to minimize latency on fetch)
3380 * WTHRESH=8 burst writeback up to two cache lines
3381 */
3382 rxdctl &= ~0x3FFFFF;
3383 rxdctl |= 0x080420;
3384 }
3385
3386 /* enable receive descriptor ring */
3387 rxdctl |= IXGBE_RXDCTL_ENABLE;
3388 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3389
3390 ixgbe_rx_desc_queue_enable(adapter, ring);
7d4987de 3391 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
acd37177
AD		 3392}
3393
48654521
AD		 3394static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3395{
3396 struct ixgbe_hw *hw = &adapter->hw;
fbe7ca7f 3397 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
48654521
AD		 3398 int p;
3399
3400 /* PSRTYPE must be initialized in non 82598 adapters */
3401 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
e8e9f696
JP		 3402 IXGBE_PSRTYPE_UDPHDR |
3403 IXGBE_PSRTYPE_IPV4HDR |
48654521 3404 IXGBE_PSRTYPE_L2HDR |
e8e9f696 3405 IXGBE_PSRTYPE_IPV6HDR;
48654521
AD		 3406
3407 if (hw->mac.type == ixgbe_mac_82598EB)
3408 return;
3409
fbe7ca7f
AD		 3410 if (rss_i > 3)
3411 psrtype |= 2 << 29;
3412 else if (rss_i > 1)
3413 psrtype |= 1 << 29;
48654521
AD		 3414
3415 for (p = 0; p < adapter->num_rx_pools; p++)
1d9c0bfd 3416 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(p)),
48654521
AD		 3417 psrtype);
3418}
3419
f5b4a52e
AD		 3420static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3421{
3422 struct ixgbe_hw *hw = &adapter->hw;
f5b4a52e 3423 u32 reg_offset, vf_shift;
435b19f6 3424 u32 gcr_ext, vmdctl;
de4c7f65 3425 int i;
f5b4a52e
AD		 3426
3427 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3428 return;
3429
3430 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
435b19f6
AD		 3431 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3432 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
1d9c0bfd 3433 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
435b19f6
AD		 3434 vmdctl |= IXGBE_VT_CTL_REPLEN;
3435 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
f5b4a52e 3436
1d9c0bfd
AD		 3437 vf_shift = VMDQ_P(0) % 32;
3438 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
f5b4a52e
AD		 3439
3440 /* Enable only the PF's pool for Tx/Rx */
435b19f6
AD		 3441 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3442 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3443 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3444 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
9b735984
GR		 3445 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
3446 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
f5b4a52e
AD		 3447
3448 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
1d9c0bfd 3449 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
f5b4a52e
AD		 3450
3451 /*
3452 * Set up VF register offsets for selected VT Mode,
3453 * i.e. 32 or 64 VFs for SR-IOV
3454 */
73079ea0
AD		 3455 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3456 case IXGBE_82599_VMDQ_8Q_MASK:
3457 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3458 break;
3459 case IXGBE_82599_VMDQ_4Q_MASK:
3460 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3461 break;
3462 default:
3463 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3464 break;
3465 }
3466
f5b4a52e
AD		 3467 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3468
435b19f6 3469
a985b6c3 3470 /* Enable MAC Anti-Spoofing */
435b19f6 3471 hw->mac.ops.set_mac_anti_spoofing(hw, (adapter->num_vfs != 0),
a985b6c3 3472 adapter->num_vfs);
de4c7f65
GR		 3473 /* For VFs that have spoof checking turned off */
3474 for (i = 0; i < adapter->num_vfs; i++) {
3475 if (!adapter->vfinfo[i].spoofchk_enabled)
3476 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3477 }
f5b4a52e
AD		 3478}
3479
477de6ed 3480static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
9a799d71 3481{
9a799d71
AK		 3482 struct ixgbe_hw *hw = &adapter->hw;
3483 struct net_device *netdev = adapter->netdev;
3484 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
477de6ed
AD		 3485 struct ixgbe_ring *rx_ring;
3486 int i;
3487 u32 mhadd, hlreg0;
48654521 3488
63f39bd1 3489#ifdef IXGBE_FCOE
477de6ed
AD		 3490 /* adjust max frame to be able to do baby jumbo for FCoE */
3491 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3492 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3493 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
9a799d71 3494
477de6ed 3495#endif /* IXGBE_FCOE */
872844dd
AD		 3496
3497 /* adjust max frame to be at least the size of a standard frame */
3498 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3499 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3500
477de6ed
AD		 3501 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3502 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3503 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3504 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3505
3506 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3507 }
3508
3509 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3510 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3511 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3512 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
9a799d71 3513
0cefafad
JB		 3514 /*
3515 * Setup the HW Rx Head and Tail Descriptor Pointers and
3516 * the Base and Length of the Rx Descriptor Ring
3517 */
9a799d71 3518 for (i = 0; i < adapter->num_rx_queues; i++) {
4a0b9ca0 3519 rx_ring = adapter->rx_ring[i];
7d637bcc
AD		 3520 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3521 set_ring_rsc_enabled(rx_ring);
1b3ff02e 3522 else
7d637bcc 3523 clear_ring_rsc_enabled(rx_ring);
477de6ed 3524 }
477de6ed
AD		 3525}
3526
7367096a
AD		 3527static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3528{
3529 struct ixgbe_hw *hw = &adapter->hw;
3530 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3531
3532 switch (hw->mac.type) {
3533 case ixgbe_mac_82598EB:
3534 /*
3535 * For VMDq support of different descriptor types or
3536 * buffer sizes through the use of multiple SRRCTL
3537 * registers, RDRXCTL.MVMEN must be set to 1
3538 *
3539 * also, the manual doesn't mention it clearly but DCA hints
3540 * will only use queue 0's tags unless this bit is set. Side
3541 * effects of setting this bit are only that SRRCTL must be
3542 * fully programmed [0..15]
3543 */
3544 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3545 break;
3546 case ixgbe_mac_82599EB:
b93a2226 3547 case ixgbe_mac_X540:
7367096a
AD		 3548 /* Disable RSC for ACK packets */
3549 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3550 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3551 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3552 /* hardware requires some bits to be set by default */
3553 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3554 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3555 break;
3556 default:
3557 /* We should do nothing since we don't know this hardware */
3558 return;
3559 }
3560
3561 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3562}
3563
477de6ed
AD		 3564/**
3565 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3566 * @adapter: board private structure
3567 *
3568 * Configure the Rx unit of the MAC after a reset.
3569 **/
3570static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3571{
3572 struct ixgbe_hw *hw = &adapter->hw;
477de6ed 3573 int i;
6dcc28b9 3574 u32 rxctrl, rfctl;
477de6ed
AD		 3575
3576 /* disable receives while setting up the descriptors */
3577 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3578 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3579
3580 ixgbe_setup_psrtype(adapter);
7367096a 3581 ixgbe_setup_rdrxctl(adapter);
477de6ed 3582
6dcc28b9
JK		 3583 /* RSC Setup */
3584 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3585 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3586 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3587 rfctl |= IXGBE_RFCTL_RSC_DIS;
3588 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3589
9e10e045 3590 /* Program registers for the distribution of queues */
f5b4a52e 3591 ixgbe_setup_mrqc(adapter);
f5b4a52e 3592
477de6ed
AD		 3593 /* set_rx_buffer_len must be called before ring initialization */
3594 ixgbe_set_rx_buffer_len(adapter);
3595
3596 /*
3597 * Setup the HW Rx Head and Tail Descriptor Pointers and
3598 * the Base and Length of the Rx Descriptor Ring
3599 */
9e10e045
AD		 3600 for (i = 0; i < adapter->num_rx_queues; i++)
3601 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
177db6ff 3602
9e10e045
AD		 3603 /* disable drop enable for 82598 parts */
3604 if (hw->mac.type == ixgbe_mac_82598EB)
3605 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3606
3607 /* enable all receives */
3608 rxctrl |= IXGBE_RXCTRL_RXEN;
3609 hw->mac.ops.enable_rx_dma(hw, rxctrl);
9a799d71
AK		 3610}
3611
80d5c368
PM		 3612static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3613 __be16 proto, u16 vid)
068c89b0
DS		 3614{
3615 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3616 struct ixgbe_hw *hw = &adapter->hw;
3617
3618 /* add VID to filter table */
1d9c0bfd 3619 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true);
f62bbb5e 3620 set_bit(vid, adapter->active_vlans);
8e586137
JP		 3621
3622 return 0;
068c89b0
DS		 3623}
3624
80d5c368
PM		 3625static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
3626 __be16 proto, u16 vid)
068c89b0
DS		 3627{
3628 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3629 struct ixgbe_hw *hw = &adapter->hw;
3630
068c89b0 3631 /* remove VID from filter table */
1d9c0bfd 3632 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), false);
f62bbb5e 3633 clear_bit(vid, adapter->active_vlans);
8e586137
JP		 3634
3635 return 0;
068c89b0
DS		 3636}
3637
5f6c0181
JB		 3638/**
3639 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3640 * @adapter: driver data
3641 */
3642static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3643{
3644 struct ixgbe_hw *hw = &adapter->hw;
f62bbb5e
JG		 3645 u32 vlnctrl;
3646
3647 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3648 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3649 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3650}
3651
3652/**
3653 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3654 * @adapter: driver data
3655 */
3656static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3657{
3658 struct ixgbe_hw *hw = &adapter->hw;
3659 u32 vlnctrl;
3660
3661 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3662 vlnctrl |= IXGBE_VLNCTRL_VFE;
3663 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3664 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3665}
3666
3667/**
3668 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3669 * @adapter: driver data
3670 */
3671static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3672{
3673 struct ixgbe_hw *hw = &adapter->hw;
3674 u32 vlnctrl;
5f6c0181
JB		 3675 int i, j;
3676
3677 switch (hw->mac.type) {
3678 case ixgbe_mac_82598EB:
f62bbb5e
JG		 3679 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3680 vlnctrl &= ~IXGBE_VLNCTRL_VME;
5f6c0181
JB		 3681 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3682 break;
3683 case ixgbe_mac_82599EB:
b93a2226 3684 case ixgbe_mac_X540:
5f6c0181
JB		 3685 for (i = 0; i < adapter->num_rx_queues; i++) {
3686 j = adapter->rx_ring[i]->reg_idx;
3687 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3688 vlnctrl &= ~IXGBE_RXDCTL_VME;
3689 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3690 }
3691 break;
3692 default:
3693 break;
3694 }
3695}
3696
3697/**
f62bbb5e 3698 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
5f6c0181
JB		 3699 * @adapter: driver data
3700 */
f62bbb5e 3701static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
5f6c0181
JB		 3702{
3703 struct ixgbe_hw *hw = &adapter->hw;
f62bbb5e 3704 u32 vlnctrl;
5f6c0181
JB		 3705 int i, j;
3706
3707 switch (hw->mac.type) {
3708 case ixgbe_mac_82598EB:
f62bbb5e
JG		 3709 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3710 vlnctrl |= IXGBE_VLNCTRL_VME;
5f6c0181
JB		 3711 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3712 break;
3713 case ixgbe_mac_82599EB:
b93a2226 3714 case ixgbe_mac_X540:
5f6c0181
JB		 3715 for (i = 0; i < adapter->num_rx_queues; i++) {
3716 j = adapter->rx_ring[i]->reg_idx;
3717 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3718 vlnctrl |= IXGBE_RXDCTL_VME;
3719 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3720 }
3721 break;
3722 default:
3723 break;
3724 }
3725}
3726
9a799d71
AK		 3727static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3728{
f62bbb5e 3729 u16 vid;
9a799d71 3730
80d5c368 3731 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
f62bbb5e
JG		 3732
3733 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
80d5c368 3734 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
9a799d71
AK		 3735}
3736
2850062a
AD		 3737/**
3738 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3739 * @netdev: network interface device structure
3740 *
3741 * Writes unicast address list to the RAR table.
3742 * Returns: -ENOMEM on failure/insufficient address space
3743 * 0 on no addresses written
3744 * X on writing X addresses to the RAR table
3745 **/
3746static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3747{
3748 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3749 struct ixgbe_hw *hw = &adapter->hw;
95447461 3750 unsigned int rar_entries = hw->mac.num_rar_entries - 1;
2850062a
AD		 3751 int count = 0;
3752
95447461
JF		 3753 /* In SR-IOV mode significantly less RAR entries are available */
3754 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3755 rar_entries = IXGBE_MAX_PF_MACVLANS - 1;
3756
2850062a
AD		 3757 /* return ENOMEM indicating insufficient memory for addresses */
3758 if (netdev_uc_count(netdev) > rar_entries)
3759 return -ENOMEM;
3760
95447461 3761 if (!netdev_uc_empty(netdev)) {
2850062a
AD		 3762 struct netdev_hw_addr *ha;
3763 /* return error if we do not support writing to RAR table */
3764 if (!hw->mac.ops.set_rar)
3765 return -ENOMEM;
3766
3767 netdev_for_each_uc_addr(ha, netdev) {
3768 if (!rar_entries)
3769 break;
3770 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
1d9c0bfd 3771 VMDQ_P(0), IXGBE_RAH_AV);
2850062a
AD		 3772 count++;
3773 }
3774 }
3775 /* write the addresses in reverse order to avoid write combining */
3776 for (; rar_entries > 0 ; rar_entries--)
3777 hw->mac.ops.clear_rar(hw, rar_entries);
3778
3779 return count;
3780}
3781
9a799d71 3782/**
2c5645cf 3783 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
9a799d71
AK		 3784 * @netdev: network interface device structure
3785 *
2c5645cf
CL		 3786 * The set_rx_method entry point is called whenever the unicast/multicast
3787 * address list or the network interface flags are updated. This routine is
3788 * responsible for configuring the hardware for proper unicast, multicast and
3789 * promiscuous mode.
9a799d71 3790 **/
7f870475 3791void ixgbe_set_rx_mode(struct net_device *netdev)
9a799d71
AK		 3792{
3793 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3794 struct ixgbe_hw *hw = &adapter->hw;
2850062a
AD		 3795 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3796 int count;
9a799d71
AK		 3797
3798 /* Check for Promiscuous and All Multicast modes */
3799
3800 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3801
f5dc442b 3802 /* set all bits that we expect to always be set */
3f2d1c0f 3803 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
f5dc442b
AD		 3804 fctrl |= IXGBE_FCTRL_BAM;
3805 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3806 fctrl |= IXGBE_FCTRL_PMCF;
3807
2850062a
AD		 3808 /* clear the bits we are changing the status of */
3809 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3810
9a799d71 3811 if (netdev->flags & IFF_PROMISC) {
e433ea1f 3812 hw->addr_ctrl.user_set_promisc = true;
9a799d71 3813 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2850062a 3814 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
670224f1
GR		 3815 /* Only disable hardware filter vlans in promiscuous mode
3816 * if SR-IOV and VMDQ are disabled - otherwise ensure
3817 * that hardware VLAN filters remain enabled.
3818 */
3819 if (!(adapter->flags & (IXGBE_FLAG_VMDQ_ENABLED |
3820 IXGBE_FLAG_SRIOV_ENABLED)))
3821 ixgbe_vlan_filter_disable(adapter);
3822 else
3823 ixgbe_vlan_filter_enable(adapter);
9a799d71 3824 } else {
746b9f02
PM		 3825 if (netdev->flags & IFF_ALLMULTI) {
3826 fctrl |= IXGBE_FCTRL_MPE;
2850062a
AD		 3827 vmolr |= IXGBE_VMOLR_MPE;
3828 } else {
3829 /*
3830 * Write addresses to the MTA, if the attempt fails
25985edc 3831 * then we should just turn on promiscuous mode so
2850062a
AD		 3832 * that we can at least receive multicast traffic
3833 */
3834 hw->mac.ops.update_mc_addr_list(hw, netdev);
3835 vmolr |= IXGBE_VMOLR_ROMPE;
746b9f02 3836 }
5f6c0181 3837 ixgbe_vlan_filter_enable(adapter);
e433ea1f 3838 hw->addr_ctrl.user_set_promisc = false;
9dcb373c
JF		 3839 }
3840
3841 /*
3842 * Write addresses to available RAR registers, if there is not
3843 * sufficient space to store all the addresses then enable
3844 * unicast promiscuous mode
3845 */
3846 count = ixgbe_write_uc_addr_list(netdev);
3847 if (count < 0) {
3848 fctrl |= IXGBE_FCTRL_UPE;
3849 vmolr |= IXGBE_VMOLR_ROPE;
9a799d71
AK		 3850 }
3851
1d9c0bfd 3852 if (adapter->num_vfs)
1cdd1ec8 3853 ixgbe_restore_vf_multicasts(adapter);
1d9c0bfd
AD		 3854
3855 if (hw->mac.type != ixgbe_mac_82598EB) {
3856 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
2850062a
AD		 3857 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3858 IXGBE_VMOLR_ROPE);
1d9c0bfd 3859 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
2850062a
AD		 3860 }
3861
3f2d1c0f
BG		 3862 /* This is useful for sniffing bad packets. */
3863 if (adapter->netdev->features & NETIF_F_RXALL) {
3864 /* UPE and MPE will be handled by normal PROMISC logic
3865 * in e1000e_set_rx_mode */
3866 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
3867 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
3868 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
3869
3870 fctrl &= ~(IXGBE_FCTRL_DPF);
3871 /* NOTE: VLAN filtering is disabled by setting PROMISC */
3872 }
3873
2850062a 3874 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
f62bbb5e 3875
f646968f 3876 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
f62bbb5e
JG		 3877 ixgbe_vlan_strip_enable(adapter);
3878 else
3879 ixgbe_vlan_strip_disable(adapter);
9a799d71
AK		 3880}
3881
021230d4
AV		 3882static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3883{
3884 int q_idx;
021230d4 3885
5a85e737
ET		 3886 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
3887 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
49c7ffbe 3888 napi_enable(&adapter->q_vector[q_idx]->napi);
5a85e737 3889 }
021230d4
AV		 3890}
3891
3892static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3893{
3894 int q_idx;
021230d4 3895
5a85e737
ET		 3896 local_bh_disable(); /* for ixgbe_qv_lock_napi() */
3897 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
49c7ffbe 3898 napi_disable(&adapter->q_vector[q_idx]->napi);
5a85e737
ET		 3899 while (!ixgbe_qv_lock_napi(adapter->q_vector[q_idx])) {
3900 pr_info("QV %d locked\n", q_idx);
3901 mdelay(1);
3902 }
3903 }
3904 local_bh_enable();
021230d4
AV		 3905}
3906
7a6b6f51 3907#ifdef CONFIG_IXGBE_DCB
49ce9c2c 3908/**
2f90b865
AD		 3909 * ixgbe_configure_dcb - Configure DCB hardware
3910 * @adapter: ixgbe adapter struct
3911 *
3912 * This is called by the driver on open to configure the DCB hardware.
3913 * This is also called by the gennetlink interface when reconfiguring
3914 * the DCB state.
3915 */
3916static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3917{
3918 struct ixgbe_hw *hw = &adapter->hw;
9806307a 3919 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2f90b865 3920
67ebd791
AD		 3921 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3922 if (hw->mac.type == ixgbe_mac_82598EB)
3923 netif_set_gso_max_size(adapter->netdev, 65536);
3924 return;
3925 }
3926
3927 if (hw->mac.type == ixgbe_mac_82598EB)
3928 netif_set_gso_max_size(adapter->netdev, 32768);
3929
971060b1 3930#ifdef IXGBE_FCOE
b120818e
JF		 3931 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3932 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
c27931da 3933#endif
b120818e
JF		 3934
3935 /* reconfigure the hardware */
3936 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
c27931da
JF		 3937 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3938 DCB_TX_CONFIG);
3939 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3940 DCB_RX_CONFIG);
3941 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
b120818e
JF		 3942 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
3943 ixgbe_dcb_hw_ets(&adapter->hw,
3944 adapter->ixgbe_ieee_ets,
3945 max_frame);
3946 ixgbe_dcb_hw_pfc_config(&adapter->hw,
3947 adapter->ixgbe_ieee_pfc->pfc_en,
3948 adapter->ixgbe_ieee_ets->prio_tc);
c27931da 3949 }
8187cd48
JF		 3950
3951 /* Enable RSS Hash per TC */
3952 if (hw->mac.type != ixgbe_mac_82598EB) {
4ae63730
AD		 3953 u32 msb = 0;
3954 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
8187cd48 3955
d411a936
AD		 3956 while (rss_i) {
3957 msb++;
3958 rss_i >>= 1;
3959 }
8187cd48 3960
4ae63730
AD		 3961 /* write msb to all 8 TCs in one write */
3962 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
8187cd48 3963 }
2f90b865 3964}
9da712d2
JF		 3965#endif
3966
3967/* Additional bittime to account for IXGBE framing */
3968#define IXGBE_ETH_FRAMING 20
3969
49ce9c2c 3970/**
9da712d2
JF		 3971 * ixgbe_hpbthresh - calculate high water mark for flow control
3972 *
3973 * @adapter: board private structure to calculate for
49ce9c2c 3974 * @pb: packet buffer to calculate
9da712d2
JF		 3975 */
3976static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3977{
3978 struct ixgbe_hw *hw = &adapter->hw;
3979 struct net_device *dev = adapter->netdev;
3980 int link, tc, kb, marker;
3981 u32 dv_id, rx_pba;
3982
3983 /* Calculate max LAN frame size */
3984 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3985
3986#ifdef IXGBE_FCOE
3987 /* FCoE traffic class uses FCOE jumbo frames */
800bd607
AD		 3988 if ((dev->features & NETIF_F_FCOE_MTU) &&
3989 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
3990 (pb == ixgbe_fcoe_get_tc(adapter)))
3991 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
9da712d2
JF		 3992
3993#endif
9da712d2
JF		 3994 /* Calculate delay value for device */
3995 switch (hw->mac.type) {
3996 case ixgbe_mac_X540:
3997 dv_id = IXGBE_DV_X540(link, tc);
3998 break;
3999 default:
4000 dv_id = IXGBE_DV(link, tc);
4001 break;
4002 }
4003
4004 /* Loopback switch introduces additional latency */
4005 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4006 dv_id += IXGBE_B2BT(tc);
4007
4008 /* Delay value is calculated in bit times convert to KB */
4009 kb = IXGBE_BT2KB(dv_id);
4010 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4011
4012 marker = rx_pba - kb;
4013
4014 /* It is possible that the packet buffer is not large enough
4015 * to provide required headroom. In this case throw an error
4016 * to user and a do the best we can.
4017 */
4018 if (marker < 0) {
4019 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4020 "headroom to support flow control."
4021 "Decrease MTU or number of traffic classes\n", pb);
4022 marker = tc + 1;
4023 }
4024
4025 return marker;
4026}
4027
49ce9c2c 4028/**
9da712d2
JF		 4029 * ixgbe_lpbthresh - calculate low water mark for for flow control
4030 *
4031 * @adapter: board private structure to calculate for
49ce9c2c 4032 * @pb: packet buffer to calculate
9da712d2
JF		 4033 */
4034static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
4035{
4036 struct ixgbe_hw *hw = &adapter->hw;
4037 struct net_device *dev = adapter->netdev;
4038 int tc;
4039 u32 dv_id;
4040
4041 /* Calculate max LAN frame size */
4042 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4043
4044 /* Calculate delay value for device */
4045 switch (hw->mac.type) {
4046 case ixgbe_mac_X540:
4047 dv_id = IXGBE_LOW_DV_X540(tc);
4048 break;
4049 default:
4050 dv_id = IXGBE_LOW_DV(tc);
4051 break;
4052 }
4053
4054 /* Delay value is calculated in bit times convert to KB */
4055 return IXGBE_BT2KB(dv_id);
4056}
4057
4058/*
4059 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4060 */
4061static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4062{
4063 struct ixgbe_hw *hw = &adapter->hw;
4064 int num_tc = netdev_get_num_tc(adapter->netdev);
4065 int i;
4066
4067 if (!num_tc)
4068 num_tc = 1;
4069
4070 hw->fc.low_water = ixgbe_lpbthresh(adapter);
4071
4072 for (i = 0; i < num_tc; i++) {
4073 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4074
4075 /* Low water marks must not be larger than high water marks */
4076 if (hw->fc.low_water > hw->fc.high_water[i])
4077 hw->fc.low_water = 0;
4078 }
4079}
4080
80605c65
JF		 4081static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4082{
80605c65 4083 struct ixgbe_hw *hw = &adapter->hw;
f7e1027f
AD		 4084 int hdrm;
4085 u8 tc = netdev_get_num_tc(adapter->netdev);
80605c65
JF		 4086
4087 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4088 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
f7e1027f
AD		 4089 hdrm = 32 << adapter->fdir_pballoc;
4090 else
4091 hdrm = 0;
80605c65 4092
f7e1027f 4093 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
9da712d2 4094 ixgbe_pbthresh_setup(adapter);
80605c65
JF		 4095}
4096
e4911d57
AD		 4097static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4098{
4099 struct ixgbe_hw *hw = &adapter->hw;
b67bfe0d 4100 struct hlist_node *node2;
e4911d57
AD		 4101 struct ixgbe_fdir_filter *filter;
4102
4103 spin_lock(&adapter->fdir_perfect_lock);
4104
4105 if (!hlist_empty(&adapter->fdir_filter_list))
4106 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4107
b67bfe0d 4108 hlist_for_each_entry_safe(filter, node2,
e4911d57
AD		 4109 &adapter->fdir_filter_list, fdir_node) {
4110 ixgbe_fdir_write_perfect_filter_82599(hw,
1f4d5183
AD		 4111 &filter->filter,
4112 filter->sw_idx,
4113 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4114 IXGBE_FDIR_DROP_QUEUE :
4115 adapter->rx_ring[filter->action]->reg_idx);
e4911d57
AD		 4116 }
4117
4118 spin_unlock(&adapter->fdir_perfect_lock);
4119}
4120
9a799d71
AK		 4121static void ixgbe_configure(struct ixgbe_adapter *adapter)
4122{
d2f5e7f3
AS		 4123 struct ixgbe_hw *hw = &adapter->hw;
4124
80605c65 4125 ixgbe_configure_pb(adapter);
7a6b6f51 4126#ifdef CONFIG_IXGBE_DCB
67ebd791 4127 ixgbe_configure_dcb(adapter);
2f90b865 4128#endif
b35d4d42
AD		 4129 /*
4130 * We must restore virtualization before VLANs or else
4131 * the VLVF registers will not be populated
4132 */
4133 ixgbe_configure_virtualization(adapter);
9a799d71 4134
4c1d7b4b 4135 ixgbe_set_rx_mode(adapter->netdev);
f62bbb5e
JG		 4136 ixgbe_restore_vlan(adapter);
4137
d2f5e7f3
AS		 4138 switch (hw->mac.type) {
4139 case ixgbe_mac_82599EB:
4140 case ixgbe_mac_X540:
4141 hw->mac.ops.disable_rx_buff(hw);
4142 break;
4143 default:
4144 break;
4145 }
4146
c4cf55e5 4147 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4c1d7b4b
AD		 4148 ixgbe_init_fdir_signature_82599(&adapter->hw,
4149 adapter->fdir_pballoc);
e4911d57
AD		 4150 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
4151 ixgbe_init_fdir_perfect_82599(&adapter->hw,
4152 adapter->fdir_pballoc);
4153 ixgbe_fdir_filter_restore(adapter);
c4cf55e5 4154 }
4c1d7b4b 4155
d2f5e7f3
AS		 4156 switch (hw->mac.type) {
4157 case ixgbe_mac_82599EB:
4158 case ixgbe_mac_X540:
4159 hw->mac.ops.enable_rx_buff(hw);
4160 break;
4161 default:
4162 break;
4163 }
4164
7c8ae65a
AD		 4165#ifdef IXGBE_FCOE
4166 /* configure FCoE L2 filters, redirection table, and Rx control */
4167 ixgbe_configure_fcoe(adapter);
4168
4169#endif /* IXGBE_FCOE */
9a799d71
AK		 4170 ixgbe_configure_tx(adapter);
4171 ixgbe_configure_rx(adapter);
9a799d71
AK		 4172}
4173
e8e26350
PW		 4174static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
4175{
4176 switch (hw->phy.type) {
4177 case ixgbe_phy_sfp_avago:
4178 case ixgbe_phy_sfp_ftl:
4179 case ixgbe_phy_sfp_intel:
4180 case ixgbe_phy_sfp_unknown:
ea0a04df
DS		 4181 case ixgbe_phy_sfp_passive_tyco:
4182 case ixgbe_phy_sfp_passive_unknown:
4183 case ixgbe_phy_sfp_active_unknown:
4184 case ixgbe_phy_sfp_ftl_active:
987e1d56
ET		 4185 case ixgbe_phy_qsfp_passive_unknown:
4186 case ixgbe_phy_qsfp_active_unknown:
4187 case ixgbe_phy_qsfp_intel:
4188 case ixgbe_phy_qsfp_unknown:
e8e26350 4189 return true;
8917b447
AD		 4190 case ixgbe_phy_nl:
4191 if (hw->mac.type == ixgbe_mac_82598EB)
4192 return true;
e8e26350
PW		 4193 default:
4194 return false;
4195 }
4196}
4197
0ecc061d 4198/**
e8e26350
PW		 4199 * ixgbe_sfp_link_config - set up SFP+ link
4200 * @adapter: pointer to private adapter struct
4201 **/
4202static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
4203{
7086400d 4204 /*
52f33af8 4205 * We are assuming the worst case scenario here, and that
7086400d
AD		 4206 * is that an SFP was inserted/removed after the reset
4207 * but before SFP detection was enabled. As such the best
4208 * solution is to just start searching as soon as we start
4209 */
4210 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
4211 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
e8e26350 4212
7086400d 4213 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
e8e26350
PW		 4214}
4215
4216/**
4217 * ixgbe_non_sfp_link_config - set up non-SFP+ link
0ecc061d
PWJ		 4218 * @hw: pointer to private hardware struct
4219 *
4220 * Returns 0 on success, negative on failure
4221 **/
e8e26350 4222static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
0ecc061d 4223{
3d292265
JH		 4224 u32 speed;
4225 bool autoneg, link_up = false;
0ecc061d
PWJ		 4226 u32 ret = IXGBE_ERR_LINK_SETUP;
4227
4228 if (hw->mac.ops.check_link)
3d292265 4229 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
0ecc061d
PWJ		 4230
4231 if (ret)
4232 goto link_cfg_out;
4233
3d292265
JH		 4234 speed = hw->phy.autoneg_advertised;
4235 if ((!speed) && (hw->mac.ops.get_link_capabilities))
4236 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
4237 &autoneg);
0ecc061d
PWJ		 4238 if (ret)
4239 goto link_cfg_out;
4240
8620a103 4241 if (hw->mac.ops.setup_link)
fd0326f2 4242 ret = hw->mac.ops.setup_link(hw, speed, link_up);
0ecc061d
PWJ		 4243link_cfg_out:
4244 return ret;
4245}
4246
a34bcfff 4247static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
9a799d71 4248{
9a799d71 4249 struct ixgbe_hw *hw = &adapter->hw;
a34bcfff 4250 u32 gpie = 0;
9a799d71 4251
9b471446 4252 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
a34bcfff
AD		 4253 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
4254 IXGBE_GPIE_OCD;
4255 gpie |= IXGBE_GPIE_EIAME;
9b471446
JB		 4256 /*
4257 * use EIAM to auto-mask when MSI-X interrupt is asserted
4258 * this saves a register write for every interrupt
4259 */
4260 switch (hw->mac.type) {
4261 case ixgbe_mac_82598EB:
4262 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4263 break;
9b471446 4264 case ixgbe_mac_82599EB:
b93a2226
DS		 4265 case ixgbe_mac_X540:
4266 default:
9b471446
JB		 4267 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
4268 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
4269 break;
4270 }
4271 } else {
021230d4
AV		 4272 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
4273 * specifically only auto mask tx and rx interrupts */
4274 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4275 }
9a799d71 4276
a34bcfff
AD		 4277 /* XXX: to interrupt immediately for EICS writes, enable this */
4278 /* gpie |= IXGBE_GPIE_EIMEN; */
4279
4280 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
4281 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
73079ea0
AD		 4282
4283 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
4284 case IXGBE_82599_VMDQ_8Q_MASK:
4285 gpie |= IXGBE_GPIE_VTMODE_16;
4286 break;
4287 case IXGBE_82599_VMDQ_4Q_MASK:
4288 gpie |= IXGBE_GPIE_VTMODE_32;
4289 break;
4290 default:
4291 gpie |= IXGBE_GPIE_VTMODE_64;
4292 break;
4293 }
119fc60a
MC		 4294 }
4295
5fdd31f9 4296 /* Enable Thermal over heat sensor interrupt */
f3df98ec
DS		 4297 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
4298 switch (adapter->hw.mac.type) {
4299 case ixgbe_mac_82599EB:
4300 gpie |= IXGBE_SDP0_GPIEN;
4301 break;
4302 case ixgbe_mac_X540:
4303 gpie |= IXGBE_EIMS_TS;
4304 break;
4305 default:
4306 break;
4307 }
4308 }
5fdd31f9 4309
a34bcfff
AD		 4310 /* Enable fan failure interrupt */
4311 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
0befdb3e 4312 gpie |= IXGBE_SDP1_GPIEN;
0befdb3e 4313
2698b208 4314 if (hw->mac.type == ixgbe_mac_82599EB) {
e8e26350
PW		 4315 gpie |= IXGBE_SDP1_GPIEN;
4316 gpie |= IXGBE_SDP2_GPIEN;
2698b208 4317 }
a34bcfff
AD		 4318
4319 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
4320}
4321
c7ccde0f 4322static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
a34bcfff
AD		 4323{
4324 struct ixgbe_hw *hw = &adapter->hw;
a34bcfff 4325 int err;
a34bcfff
AD		 4326 u32 ctrl_ext;
4327
4328 ixgbe_get_hw_control(adapter);
4329 ixgbe_setup_gpie(adapter);
e8e26350 4330
9a799d71
AK		 4331 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4332 ixgbe_configure_msix(adapter);
4333 else
4334 ixgbe_configure_msi_and_legacy(adapter);
4335
ec74a471
ET		 4336 /* enable the optics for 82599 SFP+ fiber */
4337 if (hw->mac.ops.enable_tx_laser)
61fac744
PW		 4338 hw->mac.ops.enable_tx_laser(hw);
4339
9a799d71 4340 clear_bit(__IXGBE_DOWN, &adapter->state);
021230d4
AV		 4341 ixgbe_napi_enable_all(adapter);
4342
73c4b7cd
AD		 4343 if (ixgbe_is_sfp(hw)) {
4344 ixgbe_sfp_link_config(adapter);
4345 } else {
4346 err = ixgbe_non_sfp_link_config(hw);
4347 if (err)
4348 e_err(probe, "link_config FAILED %d\n", err);
4349 }
4350
021230d4
AV		 4351 /* clear any pending interrupts, may auto mask */
4352 IXGBE_READ_REG(hw, IXGBE_EICR);
6af3b9eb 4353 ixgbe_irq_enable(adapter, true, true);
9a799d71 4354
bf069c97
DS		 4355 /*
4356 * If this adapter has a fan, check to see if we had a failure
4357 * before we enabled the interrupt.
4358 */
4359 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
4360 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
4361 if (esdp & IXGBE_ESDP_SDP1)
396e799c 4362 e_crit(drv, "Fan has stopped, replace the adapter\n");
bf069c97
DS		 4363 }
4364
1da100bb 4365 /* enable transmits */
477de6ed 4366 netif_tx_start_all_queues(adapter->netdev);
1da100bb 4367
9a799d71
AK		 4368 /* bring the link up in the watchdog, this could race with our first
4369 * link up interrupt but shouldn't be a problem */
cf8280ee
JB		 4370 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4371 adapter->link_check_timeout = jiffies;
7086400d 4372 mod_timer(&adapter->service_timer, jiffies);
c9205697
GR		 4373
4374 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4375 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4376 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4377 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
9a799d71
AK		 4378}
4379
d4f80882
AV		 4380void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4381{
4382 WARN_ON(in_interrupt());
7086400d
AD		 4383 /* put off any impending NetWatchDogTimeout */
4384 adapter->netdev->trans_start = jiffies;
4385
d4f80882 4386 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
032b4325 4387 usleep_range(1000, 2000);
d4f80882 4388 ixgbe_down(adapter);
5809a1ae
GR		 4389 /*
4390 * If SR-IOV enabled then wait a bit before bringing the adapter
4391 * back up to give the VFs time to respond to the reset. The
4392 * two second wait is based upon the watchdog timer cycle in
4393 * the VF driver.
4394 */
4395 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4396 msleep(2000);
d4f80882
AV		 4397 ixgbe_up(adapter);
4398 clear_bit(__IXGBE_RESETTING, &adapter->state);
4399}
4400
c7ccde0f 4401void ixgbe_up(struct ixgbe_adapter *adapter)
9a799d71
AK		 4402{
4403 /* hardware has been reset, we need to reload some things */
4404 ixgbe_configure(adapter);
4405
c7ccde0f 4406 ixgbe_up_complete(adapter);
9a799d71
AK		 4407}
4408
4409void ixgbe_reset(struct ixgbe_adapter *adapter)
4410{
c44ade9e 4411 struct ixgbe_hw *hw = &adapter->hw;
8ca783ab
DS		 4412 int err;
4413
7086400d
AD		 4414 /* lock SFP init bit to prevent race conditions with the watchdog */
4415 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4416 usleep_range(1000, 2000);
4417
4418 /* clear all SFP and link config related flags while holding SFP_INIT */
4419 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4420 IXGBE_FLAG2_SFP_NEEDS_RESET);
4421 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4422
8ca783ab 4423 err = hw->mac.ops.init_hw(hw);
da4dd0f7
PWJ		 4424 switch (err) {
4425 case 0:
4426 case IXGBE_ERR_SFP_NOT_PRESENT:
7086400d 4427 case IXGBE_ERR_SFP_NOT_SUPPORTED:
da4dd0f7
PWJ		 4428 break;
4429 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
849c4542 4430 e_dev_err("master disable timed out\n");
da4dd0f7 4431 break;
794caeb2
PWJ		 4432 case IXGBE_ERR_EEPROM_VERSION:
4433 /* We are running on a pre-production device, log a warning */
849c4542 4434 e_dev_warn("This device is a pre-production adapter/LOM. "
52f33af8 4435 "Please be aware there may be issues associated with "
849c4542
ET		 4436 "your hardware. If you are experiencing problems "
4437 "please contact your Intel or hardware "
4438 "representative who provided you with this "
4439 "hardware.\n");
794caeb2 4440 break;
da4dd0f7 4441 default:
849c4542 4442 e_dev_err("Hardware Error: %d\n", err);
da4dd0f7 4443 }
9a799d71 4444
7086400d
AD		 4445 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4446
9a799d71 4447 /* reprogram the RAR[0] in case user changed it. */
1d9c0bfd 4448 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
7fa7c9dc
AD		 4449
4450 /* update SAN MAC vmdq pool selection */
4451 if (hw->mac.san_mac_rar_index)
4452 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
1a71ab24 4453
8fecf67c 4454 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
1a71ab24 4455 ixgbe_ptp_reset(adapter);
9a799d71
AK		 4456}
4457
9a799d71
AK		 4458/**
4459 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
9a799d71
AK		 4460 * @rx_ring: ring to free buffers from
4461 **/
b6ec895e 4462static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
9a799d71 4463{
b6ec895e 4464 struct device *dev = rx_ring->dev;
9a799d71 4465 unsigned long size;
b6ec895e 4466 u16 i;
9a799d71 4467
84418e3b
AD		 4468 /* ring already cleared, nothing to do */
4469 if (!rx_ring->rx_buffer_info)
4470 return;
9a799d71 4471
84418e3b 4472 /* Free all the Rx ring sk_buffs */
9a799d71 4473 for (i = 0; i < rx_ring->count; i++) {
f800326d
AD		 4474 struct ixgbe_rx_buffer *rx_buffer;
4475
4476 rx_buffer = &rx_ring->rx_buffer_info[i];
4477 if (rx_buffer->skb) {
4478 struct sk_buff *skb = rx_buffer->skb;
4479 if (IXGBE_CB(skb)->page_released) {
4480 dma_unmap_page(dev,
4481 IXGBE_CB(skb)->dma,
4482 ixgbe_rx_bufsz(rx_ring),
4483 DMA_FROM_DEVICE);
4484 IXGBE_CB(skb)->page_released = false;
4c1975d7
AD		 4485 }
4486 dev_kfree_skb(skb);
9a799d71 4487 }
f800326d
AD		 4488 rx_buffer->skb = NULL;
4489 if (rx_buffer->dma)
4490 dma_unmap_page(dev, rx_buffer->dma,
4491 ixgbe_rx_pg_size(rx_ring),
4492 DMA_FROM_DEVICE);
4493 rx_buffer->dma = 0;
4494 if (rx_buffer->page)
dd411ec4
AD		 4495 __free_pages(rx_buffer->page,
4496 ixgbe_rx_pg_order(rx_ring));
f800326d 4497 rx_buffer->page = NULL;
9a799d71
AK		 4498 }
4499
4500 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4501 memset(rx_ring->rx_buffer_info, 0, size);
4502
4503 /* Zero out the descriptor ring */
4504 memset(rx_ring->desc, 0, rx_ring->size);
4505
f800326d 4506 rx_ring->next_to_alloc = 0;
9a799d71
AK		 4507 rx_ring->next_to_clean = 0;
4508 rx_ring->next_to_use = 0;
9a799d71
AK		 4509}
4510
4511/**
4512 * ixgbe_clean_tx_ring - Free Tx Buffers
9a799d71
AK		 4513 * @tx_ring: ring to be cleaned
4514 **/
b6ec895e 4515static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
9a799d71
AK		 4516{
4517 struct ixgbe_tx_buffer *tx_buffer_info;
4518 unsigned long size;
b6ec895e 4519 u16 i;
9a799d71 4520
84418e3b
AD		 4521 /* ring already cleared, nothing to do */
4522 if (!tx_ring->tx_buffer_info)
4523 return;
9a799d71 4524
84418e3b 4525 /* Free all the Tx ring sk_buffs */
9a799d71
AK		 4526 for (i = 0; i < tx_ring->count; i++) {
4527 tx_buffer_info = &tx_ring->tx_buffer_info[i];
b6ec895e 4528 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
9a799d71
AK		 4529 }
4530
dad8a3b3
JF		 4531 netdev_tx_reset_queue(txring_txq(tx_ring));
4532
9a799d71
AK		 4533 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4534 memset(tx_ring->tx_buffer_info, 0, size);
4535
4536 /* Zero out the descriptor ring */
4537 memset(tx_ring->desc, 0, tx_ring->size);
4538
4539 tx_ring->next_to_use = 0;
4540 tx_ring->next_to_clean = 0;
9a799d71
AK		 4541}
4542
4543/**
021230d4 4544 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
9a799d71
AK		 4545 * @adapter: board private structure
4546 **/
021230d4 4547static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
9a799d71
AK		 4548{
4549 int i;
4550
021230d4 4551 for (i = 0; i < adapter->num_rx_queues; i++)
b6ec895e 4552 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
9a799d71
AK		 4553}
4554
4555/**
021230d4 4556 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
9a799d71
AK		 4557 * @adapter: board private structure
4558 **/
021230d4 4559static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
9a799d71
AK		 4560{
4561 int i;
4562
021230d4 4563 for (i = 0; i < adapter->num_tx_queues; i++)
b6ec895e 4564 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
9a799d71
AK		 4565}
4566
e4911d57
AD		 4567static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4568{
b67bfe0d 4569 struct hlist_node *node2;
e4911d57
AD		 4570 struct ixgbe_fdir_filter *filter;
4571
4572 spin_lock(&adapter->fdir_perfect_lock);
4573
b67bfe0d 4574 hlist_for_each_entry_safe(filter, node2,
e4911d57
AD		 4575 &adapter->fdir_filter_list, fdir_node) {
4576 hlist_del(&filter->fdir_node);
4577 kfree(filter);
4578 }
4579 adapter->fdir_filter_count = 0;
4580
4581 spin_unlock(&adapter->fdir_perfect_lock);
4582}
4583
9a799d71
AK		 4584void ixgbe_down(struct ixgbe_adapter *adapter)
4585{
4586 struct net_device *netdev = adapter->netdev;
7f821875 4587 struct ixgbe_hw *hw = &adapter->hw;
9a799d71 4588 u32 rxctrl;
bf29ee6c 4589 int i;
9a799d71
AK		 4590
4591 /* signal that we are down to the interrupt handler */
4592 set_bit(__IXGBE_DOWN, &adapter->state);
4593
4594 /* disable receives */
7f821875
JB		 4595 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4596 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
9a799d71 4597
2d39d576
YZ		 4598 /* disable all enabled rx queues */
4599 for (i = 0; i < adapter->num_rx_queues; i++)
4600 /* this call also flushes the previous write */
4601 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4602
032b4325 4603 usleep_range(10000, 20000);
9a799d71 4604
7f821875
JB		 4605 netif_tx_stop_all_queues(netdev);
4606
7086400d 4607 /* call carrier off first to avoid false dev_watchdog timeouts */
c0dfb90e
JF		 4608 netif_carrier_off(netdev);
4609 netif_tx_disable(netdev);
4610
4611 ixgbe_irq_disable(adapter);
4612
4613 ixgbe_napi_disable_all(adapter);
4614
d034acf1
AD		 4615 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4616 IXGBE_FLAG2_RESET_REQUESTED);
7086400d
AD		 4617 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4618
4619 del_timer_sync(&adapter->service_timer);
4620
34cecbbf 4621 if (adapter->num_vfs) {
8e34d1aa
AD		 4622 /* Clear EITR Select mapping */
4623 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
34cecbbf
AD		 4624
4625 /* Mark all the VFs as inactive */
4626 for (i = 0 ; i < adapter->num_vfs; i++)
3db1cd5c 4627 adapter->vfinfo[i].clear_to_send = false;
34cecbbf 4628
34cecbbf
AD		 4629 /* ping all the active vfs to let them know we are going down */
4630 ixgbe_ping_all_vfs(adapter);
4631
4632 /* Disable all VFTE/VFRE TX/RX */
4633 ixgbe_disable_tx_rx(adapter);
b25ebfd2
PW		 4634 }
4635
7f821875
JB		 4636 /* disable transmits in the hardware now that interrupts are off */
4637 for (i = 0; i < adapter->num_tx_queues; i++) {
bf29ee6c 4638 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
34cecbbf 4639 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
7f821875 4640 }
34cecbbf
AD		 4641
4642 /* Disable the Tx DMA engine on 82599 and X540 */
bd508178
AD		 4643 switch (hw->mac.type) {
4644 case ixgbe_mac_82599EB:
b93a2226 4645 case ixgbe_mac_X540:
88512539 4646 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
e8e9f696
JP		 4647 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4648 ~IXGBE_DMATXCTL_TE));
bd508178
AD		 4649 break;
4650 default:
4651 break;
4652 }
7f821875 4653
6f4a0e45
PL		 4654 if (!pci_channel_offline(adapter->pdev))
4655 ixgbe_reset(adapter);
c6ecf39a 4656
ec74a471
ET		 4657 /* power down the optics for 82599 SFP+ fiber */
4658 if (hw->mac.ops.disable_tx_laser)
c6ecf39a
DS		 4659 hw->mac.ops.disable_tx_laser(hw);
4660
9a799d71
AK		 4661 ixgbe_clean_all_tx_rings(adapter);
4662 ixgbe_clean_all_rx_rings(adapter);
4663
5dd2d332 4664#ifdef CONFIG_IXGBE_DCA
96b0e0f6 4665 /* since we reset the hardware DCA settings were cleared */
e35ec126 4666 ixgbe_setup_dca(adapter);
96b0e0f6 4667#endif
9a799d71
AK		 4668}
4669
9a799d71
AK		 4670/**
4671 * ixgbe_tx_timeout - Respond to a Tx Hang
4672 * @netdev: network interface device structure
4673 **/
4674static void ixgbe_tx_timeout(struct net_device *netdev)
4675{
4676 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4677
4678 /* Do the reset outside of interrupt context */
c83c6cbd 4679 ixgbe_tx_timeout_reset(adapter);
9a799d71
AK		 4680}
4681
9a799d71
AK		 4682/**
4683 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4684 * @adapter: board private structure to initialize
4685 *
4686 * ixgbe_sw_init initializes the Adapter private data structure.
4687 * Fields are initialized based on PCI device information and
4688 * OS network device settings (MTU size).
4689 **/
9f9a12f8 4690static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
9a799d71
AK		 4691{
4692 struct ixgbe_hw *hw = &adapter->hw;
4693 struct pci_dev *pdev = adapter->pdev;
d3cb9869 4694 unsigned int rss, fdir;
cb6d0f5e 4695 u32 fwsm;
7a6b6f51 4696#ifdef CONFIG_IXGBE_DCB
2f90b865
AD		 4697 int j;
4698 struct tc_configuration *tc;
4699#endif
021230d4 4700
c44ade9e
JB		 4701 /* PCI config space info */
4702
4703 hw->vendor_id = pdev->vendor;
4704 hw->device_id = pdev->device;
4705 hw->revision_id = pdev->revision;
4706 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4707 hw->subsystem_device_id = pdev->subsystem_device;
4708
8fc3bb6d 4709 /* Set common capability flags and settings */
3ed69d7e 4710 rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus());
c087663e 4711 adapter->ring_feature[RING_F_RSS].limit = rss;
8fc3bb6d
ET		 4712 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4713 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
8fc3bb6d
ET		 4714 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
4715 adapter->atr_sample_rate = 20;
d3cb9869
AD		 4716 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
4717 adapter->ring_feature[RING_F_FDIR].limit = fdir;
8fc3bb6d
ET		 4718 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4719#ifdef CONFIG_IXGBE_DCA
4720 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
4721#endif
4722#ifdef IXGBE_FCOE
4723 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4724 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4725#ifdef CONFIG_IXGBE_DCB
4726 /* Default traffic class to use for FCoE */
4727 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4728#endif /* CONFIG_IXGBE_DCB */
4729#endif /* IXGBE_FCOE */
4730
4731 /* Set MAC specific capability flags and exceptions */
bd508178
AD		 4732 switch (hw->mac.type) {
4733 case ixgbe_mac_82598EB:
8fc3bb6d
ET		 4734 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
4735 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
4736
bf069c97
DS		 4737 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4738 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
8fc3bb6d 4739
49c7ffbe 4740 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
8fc3bb6d
ET		 4741 adapter->ring_feature[RING_F_FDIR].limit = 0;
4742 adapter->atr_sample_rate = 0;
4743 adapter->fdir_pballoc = 0;
4744#ifdef IXGBE_FCOE
4745 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
4746 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4747#ifdef CONFIG_IXGBE_DCB
4748 adapter->fcoe.up = 0;
4749#endif /* IXGBE_DCB */
4750#endif /* IXGBE_FCOE */
4751 break;
4752 case ixgbe_mac_82599EB:
4753 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4754 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
bd508178 4755 break;
b93a2226 4756 case ixgbe_mac_X540:
cb6d0f5e
JK		 4757 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
4758 if (fwsm & IXGBE_FWSM_TS_ENABLED)
4759 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
bd508178
AD		 4760 break;
4761 default:
4762 break;
f8212f97 4763 }
2f90b865 4764
7c8ae65a
AD		 4765#ifdef IXGBE_FCOE
4766 /* FCoE support exists, always init the FCoE lock */
4767 spin_lock_init(&adapter->fcoe.lock);
4768
4769#endif
1fc5f038
AD		 4770 /* n-tuple support exists, always init our spinlock */
4771 spin_lock_init(&adapter->fdir_perfect_lock);
4772
7a6b6f51 4773#ifdef CONFIG_IXGBE_DCB
4de2a022
JF		 4774 switch (hw->mac.type) {
4775 case ixgbe_mac_X540:
4776 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
4777 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
4778 break;
4779 default:
4780 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
4781 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
4782 break;
4783 }
4784
2f90b865
AD		 4785 /* Configure DCB traffic classes */
4786 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4787 tc = &adapter->dcb_cfg.tc_config[j];
4788 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4789 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4790 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4791 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4792 tc->dcb_pfc = pfc_disabled;
4793 }
4de2a022
JF		 4794
4795 /* Initialize default user to priority mapping, UPx->TC0 */
4796 tc = &adapter->dcb_cfg.tc_config[0];
4797 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
4798 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
4799
2f90b865
AD		 4800 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4801 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
264857b8 4802 adapter->dcb_cfg.pfc_mode_enable = false;
2f90b865 4803 adapter->dcb_set_bitmap = 0x00;
3032309b 4804 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
f525c6d2
JF		 4805 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
4806 sizeof(adapter->temp_dcb_cfg));
2f90b865
AD		 4807
4808#endif
9a799d71
AK		 4809
4810 /* default flow control settings */
cd7664f6 4811 hw->fc.requested_mode = ixgbe_fc_full;
71fd570b 4812 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
9da712d2 4813 ixgbe_pbthresh_setup(adapter);
2b9ade93
JB		 4814 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4815 hw->fc.send_xon = true;
73d80953 4816 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
9a799d71 4817
99d74487
AD		 4818#ifdef CONFIG_PCI_IOV
4819 /* assign number of SR-IOV VFs */
4820 if (hw->mac.type != ixgbe_mac_82598EB)
4821 adapter->num_vfs = (max_vfs > 63) ? 0 : max_vfs;
4822
4823#endif
30efa5a3 4824 /* enable itr by default in dynamic mode */
f7554a2b 4825 adapter->rx_itr_setting = 1;
f7554a2b 4826 adapter->tx_itr_setting = 1;
30efa5a3 4827
30efa5a3
JB		 4828 /* set default ring sizes */
4829 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4830 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4831
bd198058 4832 /* set default work limits */
59224555 4833 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
bd198058 4834
9a799d71 4835 /* initialize eeprom parameters */
c44ade9e 4836 if (ixgbe_init_eeprom_params_generic(hw)) {
849c4542 4837 e_dev_err("EEPROM initialization failed\n");
9a799d71
AK		 4838 return -EIO;
4839 }
4840
9a799d71
AK		 4841 set_bit(__IXGBE_DOWN, &adapter->state);
4842
4843 return 0;
4844}
4845
4846/**
4847 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3a581073 4848 * @tx_ring: tx descriptor ring (for a specific queue) to setup
9a799d71
AK		 4849 *
4850 * Return 0 on success, negative on failure
4851 **/
b6ec895e 4852int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
9a799d71 4853{
b6ec895e 4854 struct device *dev = tx_ring->dev;
de88eeeb
AD		 4855 int orig_node = dev_to_node(dev);
4856 int numa_node = -1;
9a799d71
AK		 4857 int size;
4858
3a581073 4859 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
de88eeeb
AD		 4860
4861 if (tx_ring->q_vector)
4862 numa_node = tx_ring->q_vector->numa_node;
4863
4864 tx_ring->tx_buffer_info = vzalloc_node(size, numa_node);
1a6c14a2 4865 if (!tx_ring->tx_buffer_info)
89bf67f1 4866 tx_ring->tx_buffer_info = vzalloc(size);
e01c31a5
JB		 4867 if (!tx_ring->tx_buffer_info)
4868 goto err;
9a799d71
AK		 4869
4870 /* round up to nearest 4K */
12207e49 4871 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3a581073 4872 tx_ring->size = ALIGN(tx_ring->size, 4096);
9a799d71 4873
de88eeeb
AD		 4874 set_dev_node(dev, numa_node);
4875 tx_ring->desc = dma_alloc_coherent(dev,
4876 tx_ring->size,
4877 &tx_ring->dma,
4878 GFP_KERNEL);
4879 set_dev_node(dev, orig_node);
4880 if (!tx_ring->desc)
4881 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
4882 &tx_ring->dma, GFP_KERNEL);
e01c31a5
JB		 4883 if (!tx_ring->desc)
4884 goto err;
9a799d71 4885
3a581073
JB		 4886 tx_ring->next_to_use = 0;
4887 tx_ring->next_to_clean = 0;
9a799d71 4888 return 0;
e01c31a5
JB		 4889
4890err:
4891 vfree(tx_ring->tx_buffer_info);
4892 tx_ring->tx_buffer_info = NULL;
b6ec895e 4893 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
e01c31a5 4894 return -ENOMEM;
9a799d71
AK		 4895}
4896
69888674
AD		 4897/**
4898 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4899 * @adapter: board private structure
4900 *
4901 * If this function returns with an error, then it's possible one or
4902 * more of the rings is populated (while the rest are not). It is the
4903 * callers duty to clean those orphaned rings.
4904 *
4905 * Return 0 on success, negative on failure
4906 **/
4907static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4908{
4909 int i, err = 0;
4910
4911 for (i = 0; i < adapter->num_tx_queues; i++) {
b6ec895e 4912 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
69888674
AD		 4913 if (!err)
4914 continue;
de3d5b94 4915
396e799c 4916 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
de3d5b94 4917 goto err_setup_tx;
69888674
AD		 4918 }
4919
de3d5b94
AD		 4920 return 0;
4921err_setup_tx:
4922 /* rewind the index freeing the rings as we go */
4923 while (i--)
4924 ixgbe_free_tx_resources(adapter->tx_ring[i]);
69888674
AD		 4925 return err;
4926}
4927
9a799d71
AK		 4928/**
4929 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3a581073 4930 * @rx_ring: rx descriptor ring (for a specific queue) to setup
9a799d71
AK		 4931 *
4932 * Returns 0 on success, negative on failure
4933 **/
b6ec895e 4934int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
9a799d71 4935{
b6ec895e 4936 struct device *dev = rx_ring->dev;
de88eeeb
AD		 4937 int orig_node = dev_to_node(dev);
4938 int numa_node = -1;
021230d4 4939 int size;
9a799d71 4940
3a581073 4941 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
de88eeeb
AD		 4942
4943 if (rx_ring->q_vector)
4944 numa_node = rx_ring->q_vector->numa_node;
4945
4946 rx_ring->rx_buffer_info = vzalloc_node(size, numa_node);
1a6c14a2 4947 if (!rx_ring->rx_buffer_info)
89bf67f1 4948 rx_ring->rx_buffer_info = vzalloc(size);
b6ec895e
AD		 4949 if (!rx_ring->rx_buffer_info)
4950 goto err;
9a799d71 4951
9a799d71 4952 /* Round up to nearest 4K */
3a581073
JB		 4953 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4954 rx_ring->size = ALIGN(rx_ring->size, 4096);
9a799d71 4955
de88eeeb
AD		 4956 set_dev_node(dev, numa_node);
4957 rx_ring->desc = dma_alloc_coherent(dev,
4958 rx_ring->size,
4959 &rx_ring->dma,
4960 GFP_KERNEL);
4961 set_dev_node(dev, orig_node);
4962 if (!rx_ring->desc)
4963 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
4964 &rx_ring->dma, GFP_KERNEL);
b6ec895e
AD		 4965 if (!rx_ring->desc)
4966 goto err;
9a799d71 4967
3a581073
JB		 4968 rx_ring->next_to_clean = 0;
4969 rx_ring->next_to_use = 0;
9a799d71
AK		 4970
4971 return 0;
b6ec895e
AD		 4972err:
4973 vfree(rx_ring->rx_buffer_info);
4974 rx_ring->rx_buffer_info = NULL;
4975 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
177db6ff 4976 return -ENOMEM;
9a799d71
AK		 4977}
4978
69888674
AD		 4979/**
4980 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4981 * @adapter: board private structure
4982 *
4983 * If this function returns with an error, then it's possible one or
4984 * more of the rings is populated (while the rest are not). It is the
4985 * callers duty to clean those orphaned rings.
4986 *
4987 * Return 0 on success, negative on failure
4988 **/
69888674
AD		 4989static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4990{
4991 int i, err = 0;
4992
4993 for (i = 0; i < adapter->num_rx_queues; i++) {
b6ec895e 4994 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
69888674
AD		 4995 if (!err)
4996 continue;
de3d5b94 4997
396e799c 4998 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
de3d5b94 4999 goto err_setup_rx;
69888674
AD		 5000 }
5001
7c8ae65a
AD		 5002#ifdef IXGBE_FCOE
5003 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5004 if (!err)
5005#endif
5006 return 0;
de3d5b94
AD		 5007err_setup_rx:
5008 /* rewind the index freeing the rings as we go */
5009 while (i--)
5010 ixgbe_free_rx_resources(adapter->rx_ring[i]);
69888674
AD		 5011 return err;
5012}
5013
9a799d71
AK		 5014/**
5015 * ixgbe_free_tx_resources - Free Tx Resources per Queue
9a799d71
AK		 5016 * @tx_ring: Tx descriptor ring for a specific queue
5017 *
5018 * Free all transmit software resources
5019 **/
b6ec895e 5020void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
9a799d71 5021{
b6ec895e 5022 ixgbe_clean_tx_ring(tx_ring);
9a799d71
AK		 5023
5024 vfree(tx_ring->tx_buffer_info);
5025 tx_ring->tx_buffer_info = NULL;
5026
b6ec895e
AD		 5027 /* if not set, then don't free */
5028 if (!tx_ring->desc)
5029 return;
5030
5031 dma_free_coherent(tx_ring->dev, tx_ring->size,
5032 tx_ring->desc, tx_ring->dma);
9a799d71
AK		 5033
5034 tx_ring->desc = NULL;
5035}
5036
5037/**
5038 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5039 * @adapter: board private structure
5040 *
5041 * Free all transmit software resources
5042 **/
5043static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5044{
5045 int i;
5046
5047 for (i = 0; i < adapter->num_tx_queues; i++)
4a0b9ca0 5048 if (adapter->tx_ring[i]->desc)
b6ec895e 5049 ixgbe_free_tx_resources(adapter->tx_ring[i]);
9a799d71
AK		 5050}
5051
5052/**
b4617240 5053 * ixgbe_free_rx_resources - Free Rx Resources
9a799d71
AK		 5054 * @rx_ring: ring to clean the resources from
5055 *
5056 * Free all receive software resources
5057 **/
b6ec895e 5058void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
9a799d71 5059{
b6ec895e 5060 ixgbe_clean_rx_ring(rx_ring);
9a799d71
AK		 5061
5062 vfree(rx_ring->rx_buffer_info);
5063 rx_ring->rx_buffer_info = NULL;
5064
b6ec895e
AD		 5065 /* if not set, then don't free */
5066 if (!rx_ring->desc)
5067 return;
5068
5069 dma_free_coherent(rx_ring->dev, rx_ring->size,
5070 rx_ring->desc, rx_ring->dma);
9a799d71
AK		 5071
5072 rx_ring->desc = NULL;
5073}
5074
5075/**
5076 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5077 * @adapter: board private structure
5078 *
5079 * Free all receive software resources
5080 **/
5081static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5082{
5083 int i;
5084
7c8ae65a
AD		 5085#ifdef IXGBE_FCOE
5086 ixgbe_free_fcoe_ddp_resources(adapter);
5087
5088#endif
9a799d71 5089 for (i = 0; i < adapter->num_rx_queues; i++)
4a0b9ca0 5090 if (adapter->rx_ring[i]->desc)
b6ec895e 5091 ixgbe_free_rx_resources(adapter->rx_ring[i]);
9a799d71
AK		 5092}
5093
9a799d71
AK		 5094/**
5095 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5096 * @netdev: network interface device structure
5097 * @new_mtu: new value for maximum frame size
5098 *
5099 * Returns 0 on success, negative on failure
5100 **/
5101static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5102{
5103 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5104 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5105
42c783c5 5106 /* MTU < 68 is an error and causes problems on some kernels */
655309e9
AD		 5107 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5108 return -EINVAL;
5109
5110 /*
872844dd
AD		 5111 * For 82599EB we cannot allow legacy VFs to enable their receive
5112 * paths when MTU greater than 1500 is configured. So display a
5113 * warning that legacy VFs will be disabled.
655309e9
AD		 5114 */
5115 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
5116 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
c560451c 5117 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
872844dd 5118 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
9a799d71 5119
396e799c 5120 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
655309e9 5121
021230d4 5122 /* must set new MTU before calling down or up */
9a799d71
AK		 5123 netdev->mtu = new_mtu;
5124
d4f80882
AV		 5125 if (netif_running(netdev))
5126 ixgbe_reinit_locked(adapter);
9a799d71
AK		 5127
5128 return 0;
5129}
5130
5131/**
5132 * ixgbe_open - Called when a network interface is made active
5133 * @netdev: network interface device structure
5134 *
5135 * Returns 0 on success, negative value on failure
5136 *
5137 * The open entry point is called when a network interface is made
5138 * active by the system (IFF_UP). At this point all resources needed
5139 * for transmit and receive operations are allocated, the interrupt
5140 * handler is registered with the OS, the watchdog timer is started,
5141 * and the stack is notified that the interface is ready.
5142 **/
5143static int ixgbe_open(struct net_device *netdev)
5144{
5145 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5146 int err;
4bebfaa5
AK		 5147
5148 /* disallow open during test */
5149 if (test_bit(__IXGBE_TESTING, &adapter->state))
5150 return -EBUSY;
9a799d71 5151
54386467
JB		 5152 netif_carrier_off(netdev);
5153
9a799d71
AK		 5154 /* allocate transmit descriptors */
5155 err = ixgbe_setup_all_tx_resources(adapter);
5156 if (err)
5157 goto err_setup_tx;
5158
9a799d71
AK		 5159 /* allocate receive descriptors */
5160 err = ixgbe_setup_all_rx_resources(adapter);
5161 if (err)
5162 goto err_setup_rx;
5163
5164 ixgbe_configure(adapter);
5165
021230d4 5166 err = ixgbe_request_irq(adapter);
9a799d71
AK		 5167 if (err)
5168 goto err_req_irq;
5169
ac802f5d
AD		 5170 /* Notify the stack of the actual queue counts. */
5171 err = netif_set_real_num_tx_queues(netdev,
5172 adapter->num_rx_pools > 1 ? 1 :
5173 adapter->num_tx_queues);
5174 if (err)
5175 goto err_set_queues;
5176
5177
5178 err = netif_set_real_num_rx_queues(netdev,
5179 adapter->num_rx_pools > 1 ? 1 :
5180 adapter->num_rx_queues);
5181 if (err)
5182 goto err_set_queues;
5183
1a71ab24 5184 ixgbe_ptp_init(adapter);
1a71ab24 5185
c7ccde0f 5186 ixgbe_up_complete(adapter);
9a799d71
AK		 5187
5188 return 0;
5189
ac802f5d
AD		 5190err_set_queues:
5191 ixgbe_free_irq(adapter);
9a799d71 5192err_req_irq:
a20a1199 5193 ixgbe_free_all_rx_resources(adapter);
de3d5b94 5194err_setup_rx:
a20a1199 5195 ixgbe_free_all_tx_resources(adapter);
de3d5b94 5196err_setup_tx:
9a799d71
AK		 5197 ixgbe_reset(adapter);
5198
5199 return err;
5200}
5201
5202/**
5203 * ixgbe_close - Disables a network interface
5204 * @netdev: network interface device structure
5205 *
5206 * Returns 0, this is not allowed to fail
5207 *
5208 * The close entry point is called when an interface is de-activated
5209 * by the OS. The hardware is still under the drivers control, but
5210 * needs to be disabled. A global MAC reset is issued to stop the
5211 * hardware, and all transmit and receive resources are freed.
5212 **/
5213static int ixgbe_close(struct net_device *netdev)
5214{
5215 struct ixgbe_adapter *adapter = netdev_priv(netdev);
9a799d71 5216
1a71ab24 5217 ixgbe_ptp_stop(adapter);
1a71ab24 5218
9a799d71
AK		 5219 ixgbe_down(adapter);
5220 ixgbe_free_irq(adapter);
5221
e4911d57
AD		 5222 ixgbe_fdir_filter_exit(adapter);
5223
9a799d71
AK		 5224 ixgbe_free_all_tx_resources(adapter);
5225 ixgbe_free_all_rx_resources(adapter);
5226
5eba3699 5227 ixgbe_release_hw_control(adapter);
9a799d71
AK		 5228
5229 return 0;
5230}
5231
b3c8b4ba
AD		 5232#ifdef CONFIG_PM
5233static int ixgbe_resume(struct pci_dev *pdev)
5234{
c60fbb00
AD		 5235 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5236 struct net_device *netdev = adapter->netdev;
b3c8b4ba
AD		 5237 u32 err;
5238
5239 pci_set_power_state(pdev, PCI_D0);
5240 pci_restore_state(pdev);
656ab817
DS		 5241 /*
5242 * pci_restore_state clears dev->state_saved so call
5243 * pci_save_state to restore it.
5244 */
5245 pci_save_state(pdev);
9ce77666 5246
5247 err = pci_enable_device_mem(pdev);
b3c8b4ba 5248 if (err) {
849c4542 5249 e_dev_err("Cannot enable PCI device from suspend\n");
b3c8b4ba
AD		 5250 return err;
5251 }
5252 pci_set_master(pdev);
5253
dd4d8ca6 5254 pci_wake_from_d3(pdev, false);
b3c8b4ba 5255
b3c8b4ba
AD		 5256 ixgbe_reset(adapter);
5257
495dce12
WJP		 5258 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5259
ac802f5d
AD		 5260 rtnl_lock();
5261 err = ixgbe_init_interrupt_scheme(adapter);
5262 if (!err && netif_running(netdev))
c60fbb00 5263 err = ixgbe_open(netdev);
ac802f5d
AD		 5264
5265 rtnl_unlock();
5266
5267 if (err)
5268 return err;
b3c8b4ba
AD		 5269
5270 netif_device_attach(netdev);
5271
5272 return 0;
5273}
b3c8b4ba 5274#endif /* CONFIG_PM */
9d8d05ae
RW		 5275
5276static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
b3c8b4ba 5277{
c60fbb00
AD		 5278 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5279 struct net_device *netdev = adapter->netdev;
e8e26350
PW		 5280 struct ixgbe_hw *hw = &adapter->hw;
5281 u32 ctrl, fctrl;
5282 u32 wufc = adapter->wol;
b3c8b4ba
AD		 5283#ifdef CONFIG_PM
5284 int retval = 0;
5285#endif
5286
5287 netif_device_detach(netdev);
5288
499ab5cc 5289 rtnl_lock();
b3c8b4ba
AD		 5290 if (netif_running(netdev)) {
5291 ixgbe_down(adapter);
5292 ixgbe_free_irq(adapter);
5293 ixgbe_free_all_tx_resources(adapter);
5294 ixgbe_free_all_rx_resources(adapter);
5295 }
499ab5cc 5296 rtnl_unlock();
b3c8b4ba 5297
5f5ae6fc
AD		 5298 ixgbe_clear_interrupt_scheme(adapter);
5299
b3c8b4ba
AD		 5300#ifdef CONFIG_PM
5301 retval = pci_save_state(pdev);
5302 if (retval)
5303 return retval;
4df10466 5304
b3c8b4ba 5305#endif
f4f1040a
JK		 5306 if (hw->mac.ops.stop_link_on_d3)
5307 hw->mac.ops.stop_link_on_d3(hw);
5308
e8e26350
PW		 5309 if (wufc) {
5310 ixgbe_set_rx_mode(netdev);
b3c8b4ba 5311
ec74a471
ET		 5312 /* enable the optics for 82599 SFP+ fiber as we can WoL */
5313 if (hw->mac.ops.enable_tx_laser)
c509e754
DS		 5314 hw->mac.ops.enable_tx_laser(hw);
5315
e8e26350
PW		 5316 /* turn on all-multi mode if wake on multicast is enabled */
5317 if (wufc & IXGBE_WUFC_MC) {
5318 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5319 fctrl |= IXGBE_FCTRL_MPE;
5320 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5321 }
5322
5323 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5324 ctrl |= IXGBE_CTRL_GIO_DIS;
5325 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5326
5327 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5328 } else {
5329 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5330 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5331 }
5332
bd508178
AD		 5333 switch (hw->mac.type) {
5334 case ixgbe_mac_82598EB:
dd4d8ca6 5335 pci_wake_from_d3(pdev, false);
bd508178
AD		 5336 break;
5337 case ixgbe_mac_82599EB:
b93a2226 5338 case ixgbe_mac_X540:
bd508178
AD		 5339 pci_wake_from_d3(pdev, !!wufc);
5340 break;
5341 default:
5342 break;
5343 }
b3c8b4ba 5344
9d8d05ae
RW		 5345 *enable_wake = !!wufc;
5346
b3c8b4ba
AD		 5347 ixgbe_release_hw_control(adapter);
5348
5349 pci_disable_device(pdev);
5350
9d8d05ae
RW		 5351 return 0;
5352}
5353
5354#ifdef CONFIG_PM
5355static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5356{
5357 int retval;
5358 bool wake;
5359
5360 retval = __ixgbe_shutdown(pdev, &wake);
5361 if (retval)
5362 return retval;
5363
5364 if (wake) {
5365 pci_prepare_to_sleep(pdev);
5366 } else {
5367 pci_wake_from_d3(pdev, false);
5368 pci_set_power_state(pdev, PCI_D3hot);
5369 }
b3c8b4ba
AD		 5370
5371 return 0;
5372}
9d8d05ae 5373#endif /* CONFIG_PM */
b3c8b4ba
AD		 5374
5375static void ixgbe_shutdown(struct pci_dev *pdev)
5376{
9d8d05ae
RW		 5377 bool wake;
5378
5379 __ixgbe_shutdown(pdev, &wake);
5380
5381 if (system_state == SYSTEM_POWER_OFF) {
5382 pci_wake_from_d3(pdev, wake);
5383 pci_set_power_state(pdev, PCI_D3hot);
5384 }
b3c8b4ba
AD		 5385}
5386
9a799d71
AK		 5387/**
5388 * ixgbe_update_stats - Update the board statistics counters.
5389 * @adapter: board private structure
5390 **/
5391void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5392{
2d86f139 5393 struct net_device *netdev = adapter->netdev;
9a799d71 5394 struct ixgbe_hw *hw = &adapter->hw;
5b7da515 5395 struct ixgbe_hw_stats *hwstats = &adapter->stats;
6f11eef7
AV		 5396 u64 total_mpc = 0;
5397 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5b7da515
AD		 5398 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5399 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
8a0da21b 5400 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
9a799d71 5401
d08935c2
DS		 5402 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5403 test_bit(__IXGBE_RESETTING, &adapter->state))
5404 return;
5405
94b982b2 5406 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
f8212f97 5407 u64 rsc_count = 0;
94b982b2 5408 u64 rsc_flush = 0;
94b982b2 5409 for (i = 0; i < adapter->num_rx_queues; i++) {
5b7da515
AD		 5410 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5411 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
94b982b2
MC		 5412 }
5413 adapter->rsc_total_count = rsc_count;
5414 adapter->rsc_total_flush = rsc_flush;
d51019a4
PW		 5415 }
5416
5b7da515
AD		 5417 for (i = 0; i < adapter->num_rx_queues; i++) {
5418 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5419 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5420 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5421 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
8a0da21b 5422 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
5b7da515
AD		 5423 bytes += rx_ring->stats.bytes;
5424 packets += rx_ring->stats.packets;
5425 }
5426 adapter->non_eop_descs = non_eop_descs;
5427 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5428 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
8a0da21b 5429 adapter->hw_csum_rx_error = hw_csum_rx_error;
5b7da515
AD		 5430 netdev->stats.rx_bytes = bytes;
5431 netdev->stats.rx_packets = packets;
5432
5433 bytes = 0;
5434 packets = 0;
7ca3bc58 5435 /* gather some stats to the adapter struct that are per queue */
5b7da515
AD		 5436 for (i = 0; i < adapter->num_tx_queues; i++) {
5437 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5438 restart_queue += tx_ring->tx_stats.restart_queue;
5439 tx_busy += tx_ring->tx_stats.tx_busy;
5440 bytes += tx_ring->stats.bytes;
5441 packets += tx_ring->stats.packets;
5442 }
eb985f09 5443 adapter->restart_queue = restart_queue;
5b7da515
AD		 5444 adapter->tx_busy = tx_busy;
5445 netdev->stats.tx_bytes = bytes;
5446 netdev->stats.tx_packets = packets;
7ca3bc58 5447
7ca647bd 5448 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
1a70db4b
ET		 5449
5450 /* 8 register reads */
6f11eef7
AV		 5451 for (i = 0; i < 8; i++) {
5452 /* for packet buffers not used, the register should read 0 */
5453 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5454 missed_rx += mpc;
7ca647bd
JP		 5455 hwstats->mpc[i] += mpc;
5456 total_mpc += hwstats->mpc[i];
1a70db4b
ET		 5457 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5458 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
bd508178
AD		 5459 switch (hw->mac.type) {
5460 case ixgbe_mac_82598EB:
1a70db4b
ET		 5461 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5462 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5463 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
7ca647bd
JP		 5464 hwstats->pxonrxc[i] +=
5465 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
bd508178
AD		 5466 break;
5467 case ixgbe_mac_82599EB:
b93a2226 5468 case ixgbe_mac_X540:
bd508178
AD		 5469 hwstats->pxonrxc[i] +=
5470 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
bd508178
AD		 5471 break;
5472 default:
5473 break;
e8e26350 5474 }
6f11eef7 5475 }
1a70db4b
ET		 5476
5477 /*16 register reads */
5478 for (i = 0; i < 16; i++) {
5479 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5480 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5481 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5482 (hw->mac.type == ixgbe_mac_X540)) {
5483 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5484 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5485 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5486 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5487 }
5488 }
5489
7ca647bd 5490 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
6f11eef7 5491 /* work around hardware counting issue */
7ca647bd 5492 hwstats->gprc -= missed_rx;
6f11eef7 5493
c84d324c
JF		 5494 ixgbe_update_xoff_received(adapter);
5495
6f11eef7 5496 /* 82598 hardware only has a 32 bit counter in the high register */
bd508178
AD		 5497 switch (hw->mac.type) {
5498 case ixgbe_mac_82598EB:
5499 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
bd508178
AD		 5500 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5501 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5502 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5503 break;
b93a2226 5504 case ixgbe_mac_X540:
58f6bcf9
ET		 5505 /* OS2BMC stats are X540 only*/
5506 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5507 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5508 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5509 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5510 case ixgbe_mac_82599EB:
a4d4f629
AD		 5511 for (i = 0; i < 16; i++)
5512 adapter->hw_rx_no_dma_resources +=
5513 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
7ca647bd 5514 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
bd508178 5515 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
7ca647bd 5516 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
bd508178 5517 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
7ca647bd 5518 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
bd508178 5519 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
7ca647bd 5520 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
7ca647bd
JP		 5521 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5522 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
6d45522c 5523#ifdef IXGBE_FCOE
7ca647bd
JP		 5524 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5525 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5526 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5527 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5528 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5529 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
7b859ebc 5530 /* Add up per cpu counters for total ddp aloc fail */
5a1ee270
AD		 5531 if (adapter->fcoe.ddp_pool) {
5532 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5533 struct ixgbe_fcoe_ddp_pool *ddp_pool;
5534 unsigned int cpu;
5535 u64 noddp = 0, noddp_ext_buff = 0;
7b859ebc 5536 for_each_possible_cpu(cpu) {
5a1ee270
AD		 5537 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
5538 noddp += ddp_pool->noddp;
5539 noddp_ext_buff += ddp_pool->noddp_ext_buff;
7b859ebc 5540 }
5a1ee270
AD		 5541 hwstats->fcoe_noddp = noddp;
5542 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
7b859ebc 5543 }
6d45522c 5544#endif /* IXGBE_FCOE */
bd508178
AD		 5545 break;
5546 default:
5547 break;
e8e26350 5548 }
9a799d71 5549 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
7ca647bd
JP		 5550 hwstats->bprc += bprc;
5551 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
e8e26350 5552 if (hw->mac.type == ixgbe_mac_82598EB)
7ca647bd
JP		 5553 hwstats->mprc -= bprc;
5554 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5555 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5556 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5557 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5558 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5559 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5560 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5561 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
6f11eef7 5562 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
7ca647bd 5563 hwstats->lxontxc += lxon;
6f11eef7 5564 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
7ca647bd 5565 hwstats->lxofftxc += lxoff;
7ca647bd
JP		 5566 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5567 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
6f11eef7
AV		 5568 /*
5569 * 82598 errata - tx of flow control packets is included in tx counters
5570 */
5571 xon_off_tot = lxon + lxoff;
7ca647bd
JP		 5572 hwstats->gptc -= xon_off_tot;
5573 hwstats->mptc -= xon_off_tot;
5574 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5575 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5576 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5577 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5578 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5579 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5580 hwstats->ptc64 -= xon_off_tot;
5581 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5582 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5583 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5584 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5585 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5586 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
9a799d71
AK		 5587
5588 /* Fill out the OS statistics structure */
7ca647bd 5589 netdev->stats.multicast = hwstats->mprc;
9a799d71
AK		 5590
5591 /* Rx Errors */
7ca647bd 5592 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
2d86f139 5593 netdev->stats.rx_dropped = 0;
7ca647bd
JP		 5594 netdev->stats.rx_length_errors = hwstats->rlec;
5595 netdev->stats.rx_crc_errors = hwstats->crcerrs;
2d86f139 5596 netdev->stats.rx_missed_errors = total_mpc;
9a799d71
AK		 5597}
5598
5599/**
d034acf1 5600 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
49ce9c2c 5601 * @adapter: pointer to the device adapter structure
9a799d71 5602 **/
d034acf1 5603static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
9a799d71 5604{
cf8280ee 5605 struct ixgbe_hw *hw = &adapter->hw;
fe49f04a 5606 int i;
cf8280ee 5607
d034acf1
AD		 5608 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5609 return;
5610
5611 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
22d5a71b 5612
d034acf1 5613 /* if interface is down do nothing */
fe49f04a 5614 if (test_bit(__IXGBE_DOWN, &adapter->state))
d034acf1
AD		 5615 return;
5616
5617 /* do nothing if we are not using signature filters */
5618 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5619 return;
5620
5621 adapter->fdir_overflow++;
5622
93c52dd0
AD		 5623 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5624 for (i = 0; i < adapter->num_tx_queues; i++)
5625 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
f0f9778d 5626 &(adapter->tx_ring[i]->state));
d034acf1
AD		 5627 /* re-enable flow director interrupts */
5628 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
93c52dd0
AD		 5629 } else {
5630 e_err(probe, "failed to finish FDIR re-initialization, "
5631 "ignored adding FDIR ATR filters\n");
5632 }
93c52dd0
AD		 5633}
5634
5635/**
5636 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
49ce9c2c 5637 * @adapter: pointer to the device adapter structure
93c52dd0
AD		 5638 *
5639 * This function serves two purposes. First it strobes the interrupt lines
52f33af8 5640 * in order to make certain interrupts are occurring. Secondly it sets the
93c52dd0 5641 * bits needed to check for TX hangs. As a result we should immediately
52f33af8 5642 * determine if a hang has occurred.
93c52dd0
AD		 5643 */
5644static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
9a799d71 5645{
cf8280ee 5646 struct ixgbe_hw *hw = &adapter->hw;
fe49f04a
AD		 5647 u64 eics = 0;
5648 int i;
cf8280ee 5649
93c52dd0
AD		 5650 /* If we're down or resetting, just bail */
5651 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5652 test_bit(__IXGBE_RESETTING, &adapter->state))
5653 return;
22d5a71b 5654
93c52dd0
AD		 5655 /* Force detection of hung controller */
5656 if (netif_carrier_ok(adapter->netdev)) {
5657 for (i = 0; i < adapter->num_tx_queues; i++)
5658 set_check_for_tx_hang(adapter->tx_ring[i]);
5659 }
22d5a71b 5660
fe49f04a
AD		 5661 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5662 /*
5663 * for legacy and MSI interrupts don't set any bits
5664 * that are enabled for EIAM, because this operation
5665 * would set *both* EIMS and EICS for any bit in EIAM
5666 */
5667 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5668 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
93c52dd0
AD		 5669 } else {
5670 /* get one bit for every active tx/rx interrupt vector */
49c7ffbe 5671 for (i = 0; i < adapter->num_q_vectors; i++) {
93c52dd0 5672 struct ixgbe_q_vector *qv = adapter->q_vector[i];
efe3d3c8 5673 if (qv->rx.ring || qv->tx.ring)
93c52dd0
AD		 5674 eics |= ((u64)1 << i);
5675 }
cf8280ee 5676 }
9a799d71 5677
93c52dd0 5678 /* Cause software interrupt to ensure rings are cleaned */
fe49f04a
AD		 5679 ixgbe_irq_rearm_queues(adapter, eics);
5680
cf8280ee
JB		 5681}
5682
e8e26350 5683/**
93c52dd0 5684 * ixgbe_watchdog_update_link - update the link status
49ce9c2c
BH		 5685 * @adapter: pointer to the device adapter structure
5686 * @link_speed: pointer to a u32 to store the link_speed
e8e26350 5687 **/
93c52dd0 5688static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
e8e26350 5689{
e8e26350 5690 struct ixgbe_hw *hw = &adapter->hw;
93c52dd0
AD		 5691 u32 link_speed = adapter->link_speed;
5692 bool link_up = adapter->link_up;
041441d0 5693 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
e8e26350 5694
93c52dd0
AD		 5695 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5696 return;
5697
5698 if (hw->mac.ops.check_link) {
5699 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
c4cf55e5 5700 } else {
93c52dd0
AD		 5701 /* always assume link is up, if no check link function */
5702 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5703 link_up = true;
c4cf55e5 5704 }
041441d0
AD		 5705
5706 if (adapter->ixgbe_ieee_pfc)
5707 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
5708
3ebe8fde 5709 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
041441d0 5710 hw->mac.ops.fc_enable(hw);
3ebe8fde
AD		 5711 ixgbe_set_rx_drop_en(adapter);
5712 }
93c52dd0
AD		 5713
5714 if (link_up ||
5715 time_after(jiffies, (adapter->link_check_timeout +
5716 IXGBE_TRY_LINK_TIMEOUT))) {
5717 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5718 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5719 IXGBE_WRITE_FLUSH(hw);
5720 }
5721
5722 adapter->link_up = link_up;
5723 adapter->link_speed = link_speed;
e8e26350
PW		 5724}
5725
107d3018
AD		 5726static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
5727{
5728#ifdef CONFIG_IXGBE_DCB
5729 struct net_device *netdev = adapter->netdev;
5730 struct dcb_app app = {
5731 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
5732 .protocol = 0,
5733 };
5734 u8 up = 0;
5735
5736 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
5737 up = dcb_ieee_getapp_mask(netdev, &app);
5738
5739 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
5740#endif
5741}
5742
e8e26350 5743/**
93c52dd0
AD		 5744 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5745 * print link up message
49ce9c2c 5746 * @adapter: pointer to the device adapter structure
e8e26350 5747 **/
93c52dd0 5748static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
e8e26350 5749{
93c52dd0 5750 struct net_device *netdev = adapter->netdev;
e8e26350 5751 struct ixgbe_hw *hw = &adapter->hw;
93c52dd0
AD		 5752 u32 link_speed = adapter->link_speed;
5753 bool flow_rx, flow_tx;
e8e26350 5754
93c52dd0
AD		 5755 /* only continue if link was previously down */
5756 if (netif_carrier_ok(netdev))
a985b6c3 5757 return;
63d6e1d8 5758
93c52dd0 5759 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
63d6e1d8 5760
93c52dd0
AD		 5761 switch (hw->mac.type) {
5762 case ixgbe_mac_82598EB: {
5763 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5764 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5765 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5766 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5767 }
5768 break;
5769 case ixgbe_mac_X540:
5770 case ixgbe_mac_82599EB: {
5771 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5772 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5773 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5774 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5775 }
5776 break;
5777 default:
5778 flow_tx = false;
5779 flow_rx = false;
5780 break;
e8e26350 5781 }
3a6a4eda 5782
6cb562d6
JK		 5783 adapter->last_rx_ptp_check = jiffies;
5784
8fecf67c 5785 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
1a71ab24 5786 ixgbe_ptp_start_cyclecounter(adapter);
3a6a4eda 5787
93c52dd0
AD		 5788 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5789 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5790 "10 Gbps" :
5791 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5792 "1 Gbps" :
5793 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
5794 "100 Mbps" :
5795 "unknown speed"))),
5796 ((flow_rx && flow_tx) ? "RX/TX" :
5797 (flow_rx ? "RX" :
5798 (flow_tx ? "TX" : "None"))));
e8e26350 5799
93c52dd0 5800 netif_carrier_on(netdev);
93c52dd0 5801 ixgbe_check_vf_rate_limit(adapter);
befa2af7 5802
107d3018
AD		 5803 /* update the default user priority for VFs */
5804 ixgbe_update_default_up(adapter);
5805
befa2af7
AD		 5806 /* ping all the active vfs to let them know link has changed */
5807 ixgbe_ping_all_vfs(adapter);
e8e26350
PW		 5808}
5809
c4cf55e5 5810/**
93c52dd0
AD		 5811 * ixgbe_watchdog_link_is_down - update netif_carrier status and
5812 * print link down message
49ce9c2c 5813 * @adapter: pointer to the adapter structure
c4cf55e5 5814 **/
581330ba 5815static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
c4cf55e5 5816{
cf8280ee 5817 struct net_device *netdev = adapter->netdev;
c4cf55e5 5818 struct ixgbe_hw *hw = &adapter->hw;
10eec955 5819
93c52dd0
AD		 5820 adapter->link_up = false;
5821 adapter->link_speed = 0;
cf8280ee 5822
93c52dd0
AD		 5823 /* only continue if link was up previously */
5824 if (!netif_carrier_ok(netdev))
5825 return;
264857b8 5826
93c52dd0
AD		 5827 /* poll for SFP+ cable when link is down */
5828 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
5829 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
9a799d71 5830
8fecf67c 5831 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
1a71ab24 5832 ixgbe_ptp_start_cyclecounter(adapter);
3a6a4eda 5833
93c52dd0
AD		 5834 e_info(drv, "NIC Link is Down\n");
5835 netif_carrier_off(netdev);
befa2af7
AD		 5836
5837 /* ping all the active vfs to let them know link has changed */
5838 ixgbe_ping_all_vfs(adapter);
93c52dd0 5839}
e8e26350 5840
93c52dd0
AD		 5841/**
5842 * ixgbe_watchdog_flush_tx - flush queues on link down
49ce9c2c 5843 * @adapter: pointer to the device adapter structure
93c52dd0
AD		 5844 **/
5845static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
5846{
c4cf55e5 5847 int i;
93c52dd0 5848 int some_tx_pending = 0;
c4cf55e5 5849
93c52dd0 5850 if (!netif_carrier_ok(adapter->netdev)) {
bc59fcda 5851 for (i = 0; i < adapter->num_tx_queues; i++) {
93c52dd0 5852 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
bc59fcda
NS		 5853 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5854 some_tx_pending = 1;
5855 break;
5856 }
5857 }
5858
5859 if (some_tx_pending) {
5860 /* We've lost link, so the controller stops DMA,
5861 * but we've got queued Tx work that's never going
5862 * to get done, so reset controller to flush Tx.
5863 * (Do the reset outside of interrupt context).
5864 */
12ff3f3b 5865 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
c83c6cbd 5866 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
bc59fcda 5867 }
c4cf55e5 5868 }
c4cf55e5
PWJ		 5869}
5870
a985b6c3
GR		 5871static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
5872{
5873 u32 ssvpc;
5874
0584d999
GR		 5875 /* Do not perform spoof check for 82598 or if not in IOV mode */
5876 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
5877 adapter->num_vfs == 0)
a985b6c3
GR		 5878 return;
5879
5880 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
5881
5882 /*
5883 * ssvpc register is cleared on read, if zero then no
5884 * spoofed packets in the last interval.
5885 */
5886 if (!ssvpc)
5887 return;
5888
d6ea0754 5889 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
a985b6c3
GR		 5890}
5891
93c52dd0
AD		 5892/**
5893 * ixgbe_watchdog_subtask - check and bring link up
49ce9c2c 5894 * @adapter: pointer to the device adapter structure
93c52dd0
AD		 5895 **/
5896static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
5897{
5898 /* if interface is down do nothing */
7edebf9a
ET		 5899 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5900 test_bit(__IXGBE_RESETTING, &adapter->state))
93c52dd0
AD		 5901 return;
5902
5903 ixgbe_watchdog_update_link(adapter);
5904
5905 if (adapter->link_up)
5906 ixgbe_watchdog_link_is_up(adapter);
5907 else
5908 ixgbe_watchdog_link_is_down(adapter);
bc59fcda 5909
a985b6c3 5910 ixgbe_spoof_check(adapter);
9a799d71 5911 ixgbe_update_stats(adapter);
93c52dd0
AD		 5912
5913 ixgbe_watchdog_flush_tx(adapter);
9a799d71 5914}
10eec955 5915
cf8280ee 5916/**
7086400d 5917 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
49ce9c2c 5918 * @adapter: the ixgbe adapter structure
cf8280ee 5919 **/
7086400d 5920static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
cf8280ee 5921{
cf8280ee 5922 struct ixgbe_hw *hw = &adapter->hw;
7086400d 5923 s32 err;
cf8280ee 5924
7086400d
AD		 5925 /* not searching for SFP so there is nothing to do here */
5926 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
5927 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5928 return;
10eec955 5929
7086400d
AD		 5930 /* someone else is in init, wait until next service event */
5931 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5932 return;
cf8280ee 5933
7086400d
AD		 5934 err = hw->phy.ops.identify_sfp(hw);
5935 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5936 goto sfp_out;
264857b8 5937
7086400d
AD		 5938 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
5939 /* If no cable is present, then we need to reset
5940 * the next time we find a good cable. */
5941 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
cf8280ee 5942 }
9a799d71 5943
7086400d
AD		 5944 /* exit on error */
5945 if (err)
5946 goto sfp_out;
e8e26350 5947
7086400d
AD		 5948 /* exit if reset not needed */
5949 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5950 goto sfp_out;
9a799d71 5951
7086400d 5952 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
bc59fcda 5953
7086400d
AD		 5954 /*
5955 * A module may be identified correctly, but the EEPROM may not have
5956 * support for that module. setup_sfp() will fail in that case, so
5957 * we should not allow that module to load.
5958 */
5959 if (hw->mac.type == ixgbe_mac_82598EB)
5960 err = hw->phy.ops.reset(hw);
5961 else
5962 err = hw->mac.ops.setup_sfp(hw);
5963
5964 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5965 goto sfp_out;
5966
5967 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
5968 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
5969
5970sfp_out:
5971 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5972
5973 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
5974 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
5975 e_dev_err("failed to initialize because an unsupported "
5976 "SFP+ module type was detected.\n");
5977 e_dev_err("Reload the driver after installing a "
5978 "supported module.\n");
5979 unregister_netdev(adapter->netdev);
bc59fcda 5980 }
7086400d 5981}
bc59fcda 5982
7086400d
AD		 5983/**
5984 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
49ce9c2c 5985 * @adapter: the ixgbe adapter structure
7086400d
AD		 5986 **/
5987static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
5988{
5989 struct ixgbe_hw *hw = &adapter->hw;
3d292265
JH		 5990 u32 speed;
5991 bool autoneg = false;
7086400d
AD		 5992
5993 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
5994 return;
5995
5996 /* someone else is in init, wait until next service event */
5997 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5998 return;
5999
6000 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6001
3d292265 6002 speed = hw->phy.autoneg_advertised;
ed33ff66 6003 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
3d292265 6004 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
ed33ff66
ET		 6005
6006 /* setup the highest link when no autoneg */
6007 if (!autoneg) {
6008 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
6009 speed = IXGBE_LINK_SPEED_10GB_FULL;
6010 }
6011 }
6012
7086400d 6013 if (hw->mac.ops.setup_link)
fd0326f2 6014 hw->mac.ops.setup_link(hw, speed, true);
7086400d
AD		 6015
6016 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6017 adapter->link_check_timeout = jiffies;
6018 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6019}
6020
83c61fa9
GR		 6021#ifdef CONFIG_PCI_IOV
6022static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6023{
6024 int vf;
6025 struct ixgbe_hw *hw = &adapter->hw;
6026 struct net_device *netdev = adapter->netdev;
6027 u32 gpc;
6028 u32 ciaa, ciad;
6029
6030 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6031 if (gpc) /* If incrementing then no need for the check below */
6032 return;
6033 /*
6034 * Check to see if a bad DMA write target from an errant or
6035 * malicious VF has caused a PCIe error. If so then we can
6036 * issue a VFLR to the offending VF(s) and then resume without
6037 * requesting a full slot reset.
6038 */
6039
6040 for (vf = 0; vf < adapter->num_vfs; vf++) {
6041 ciaa = (vf << 16) | 0x80000000;
6042 /* 32 bit read so align, we really want status at offset 6 */
6043 ciaa |= PCI_COMMAND;
6044 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6045 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
6046 ciaa &= 0x7FFFFFFF;
6047 /* disable debug mode asap after reading data */
6048 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6049 /* Get the upper 16 bits which will be the PCI status reg */
6050 ciad >>= 16;
6051 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
6052 netdev_err(netdev, "VF %d Hung DMA\n", vf);
6053 /* Issue VFLR */
6054 ciaa = (vf << 16) | 0x80000000;
6055 ciaa |= 0xA8;
6056 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6057 ciad = 0x00008000; /* VFLR */
6058 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
6059 ciaa &= 0x7FFFFFFF;
6060 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6061 }
6062 }
6063}
6064
6065#endif
7086400d
AD		 6066/**
6067 * ixgbe_service_timer - Timer Call-back
6068 * @data: pointer to adapter cast into an unsigned long
6069 **/
6070static void ixgbe_service_timer(unsigned long data)
6071{
6072 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6073 unsigned long next_event_offset;
83c61fa9 6074 bool ready = true;
7086400d 6075
6bb78cfb
AD		 6076 /* poll faster when waiting for link */
6077 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6078 next_event_offset = HZ / 10;
6079 else
6080 next_event_offset = HZ * 2;
83c61fa9 6081
6bb78cfb 6082#ifdef CONFIG_PCI_IOV
83c61fa9
GR		 6083 /*
6084 * don't bother with SR-IOV VF DMA hang check if there are
6085 * no VFs or the link is down
6086 */
6087 if (!adapter->num_vfs ||
6bb78cfb 6088 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
83c61fa9 6089 goto normal_timer_service;
83c61fa9
GR		 6090
6091 /* If we have VFs allocated then we must check for DMA hangs */
6092 ixgbe_check_for_bad_vf(adapter);
6093 next_event_offset = HZ / 50;
6094 adapter->timer_event_accumulator++;
6095
6bb78cfb 6096 if (adapter->timer_event_accumulator >= 100)
83c61fa9 6097 adapter->timer_event_accumulator = 0;
7086400d 6098 else
6bb78cfb 6099 ready = false;
7086400d 6100
6bb78cfb 6101normal_timer_service:
83c61fa9 6102#endif
7086400d
AD		 6103 /* Reset the timer */
6104 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6105
83c61fa9
GR		 6106 if (ready)
6107 ixgbe_service_event_schedule(adapter);
7086400d
AD		 6108}
6109
c83c6cbd
AD		 6110static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6111{
6112 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6113 return;
6114
6115 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6116
6117 /* If we're already down or resetting, just bail */
6118 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6119 test_bit(__IXGBE_RESETTING, &adapter->state))
6120 return;
6121
6122 ixgbe_dump(adapter);
6123 netdev_err(adapter->netdev, "Reset adapter\n");
6124 adapter->tx_timeout_count++;
6125
6126 ixgbe_reinit_locked(adapter);
6127}
6128
7086400d
AD		 6129/**
6130 * ixgbe_service_task - manages and runs subtasks
6131 * @work: pointer to work_struct containing our data
6132 **/
6133static void ixgbe_service_task(struct work_struct *work)
6134{
6135 struct ixgbe_adapter *adapter = container_of(work,
6136 struct ixgbe_adapter,
6137 service_task);
c83c6cbd 6138 ixgbe_reset_subtask(adapter);
7086400d
AD		 6139 ixgbe_sfp_detection_subtask(adapter);
6140 ixgbe_sfp_link_config_subtask(adapter);
f0f9778d 6141 ixgbe_check_overtemp_subtask(adapter);
93c52dd0 6142 ixgbe_watchdog_subtask(adapter);
d034acf1 6143 ixgbe_fdir_reinit_subtask(adapter);
93c52dd0 6144 ixgbe_check_hang_subtask(adapter);
891dc082 6145
8fecf67c 6146 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
891dc082
JK		 6147 ixgbe_ptp_overflow_check(adapter);
6148 ixgbe_ptp_rx_hang(adapter);
6149 }
7086400d
AD		 6150
6151 ixgbe_service_event_complete(adapter);
9a799d71
AK		 6152}
6153
fd0db0ed
AD		 6154static int ixgbe_tso(struct ixgbe_ring *tx_ring,
6155 struct ixgbe_tx_buffer *first,
244e27ad 6156 u8 *hdr_len)
897ab156 6157{
fd0db0ed 6158 struct sk_buff *skb = first->skb;
897ab156
AD		 6159 u32 vlan_macip_lens, type_tucmd;
6160 u32 mss_l4len_idx, l4len;
9a799d71 6161
8f4fbb9b
AD		 6162 if (skb->ip_summed != CHECKSUM_PARTIAL)
6163 return 0;
6164
897ab156
AD		 6165 if (!skb_is_gso(skb))
6166 return 0;
9a799d71 6167
897ab156 6168 if (skb_header_cloned(skb)) {
244e27ad 6169 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
897ab156
AD		 6170 if (err)
6171 return err;
9a799d71 6172 }
9a799d71 6173
897ab156
AD		 6174 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6175 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6176
244e27ad 6177 if (first->protocol == __constant_htons(ETH_P_IP)) {
897ab156
AD		 6178 struct iphdr *iph = ip_hdr(skb);
6179 iph->tot_len = 0;
6180 iph->check = 0;
6181 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6182 iph->daddr, 0,
6183 IPPROTO_TCP,
6184 0);
6185 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
244e27ad
AD		 6186 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6187 IXGBE_TX_FLAGS_CSUM |
6188 IXGBE_TX_FLAGS_IPV4;
897ab156
AD		 6189 } else if (skb_is_gso_v6(skb)) {
6190 ipv6_hdr(skb)->payload_len = 0;
6191 tcp_hdr(skb)->check =
6192 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6193 &ipv6_hdr(skb)->daddr,
6194 0, IPPROTO_TCP, 0);
244e27ad
AD		 6195 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6196 IXGBE_TX_FLAGS_CSUM;
897ab156
AD		 6197 }
6198
091a6246 6199 /* compute header lengths */
897ab156
AD		 6200 l4len = tcp_hdrlen(skb);
6201 *hdr_len = skb_transport_offset(skb) + l4len;
6202
091a6246
AD		 6203 /* update gso size and bytecount with header size */
6204 first->gso_segs = skb_shinfo(skb)->gso_segs;
6205 first->bytecount += (first->gso_segs - 1) * *hdr_len;
6206
c44f5f51 6207 /* mss_l4len_id: use 0 as index for TSO */
897ab156
AD		 6208 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6209 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
897ab156
AD		 6210
6211 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6212 vlan_macip_lens = skb_network_header_len(skb);
6213 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
244e27ad 6214 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
897ab156
AD		 6215
6216 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
244e27ad 6217 mss_l4len_idx);
897ab156
AD		 6218
6219 return 1;
6220}
6221
244e27ad
AD		 6222static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6223 struct ixgbe_tx_buffer *first)
7ca647bd 6224{
fd0db0ed 6225 struct sk_buff *skb = first->skb;
897ab156
AD		 6226 u32 vlan_macip_lens = 0;
6227 u32 mss_l4len_idx = 0;
6228 u32 type_tucmd = 0;
7ca647bd 6229
897ab156 6230 if (skb->ip_summed != CHECKSUM_PARTIAL) {
472148c3
AD		 6231 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6232 !(first->tx_flags & IXGBE_TX_FLAGS_CC))
6233 return;
897ab156
AD		 6234 } else {
6235 u8 l4_hdr = 0;
244e27ad 6236 switch (first->protocol) {
897ab156
AD		 6237 case __constant_htons(ETH_P_IP):
6238 vlan_macip_lens |= skb_network_header_len(skb);
6239 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6240 l4_hdr = ip_hdr(skb)->protocol;
7ca647bd 6241 break;
897ab156
AD		 6242 case __constant_htons(ETH_P_IPV6):
6243 vlan_macip_lens |= skb_network_header_len(skb);
6244 l4_hdr = ipv6_hdr(skb)->nexthdr;
6245 break;
6246 default:
6247 if (unlikely(net_ratelimit())) {
6248 dev_warn(tx_ring->dev,
6249 "partial checksum but proto=%x!\n",
244e27ad 6250 first->protocol);
897ab156 6251 }
7ca647bd
JP		 6252 break;
6253 }
897ab156
AD		 6254
6255 switch (l4_hdr) {
7ca647bd 6256 case IPPROTO_TCP:
897ab156
AD		 6257 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6258 mss_l4len_idx = tcp_hdrlen(skb) <<
6259 IXGBE_ADVTXD_L4LEN_SHIFT;
7ca647bd
JP		 6260 break;
6261 case IPPROTO_SCTP:
897ab156
AD		 6262 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6263 mss_l4len_idx = sizeof(struct sctphdr) <<
6264 IXGBE_ADVTXD_L4LEN_SHIFT;
6265 break;
6266 case IPPROTO_UDP:
6267 mss_l4len_idx = sizeof(struct udphdr) <<
6268 IXGBE_ADVTXD_L4LEN_SHIFT;
6269 break;
6270 default:
6271 if (unlikely(net_ratelimit())) {
6272 dev_warn(tx_ring->dev,
6273 "partial checksum but l4 proto=%x!\n",
244e27ad 6274 l4_hdr);
897ab156 6275 }
7ca647bd
JP		 6276 break;
6277 }
244e27ad
AD		 6278
6279 /* update TX checksum flag */
6280 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
7ca647bd
JP		 6281 }
6282
244e27ad 6283 /* vlan_macip_lens: MACLEN, VLAN tag */
897ab156 6284 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
244e27ad 6285 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
9a799d71 6286
897ab156
AD		 6287 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6288 type_tucmd, mss_l4len_idx);
9a799d71
AK		 6289}
6290
472148c3
AD		 6291#define IXGBE_SET_FLAG(_input, _flag, _result) \
6292 ((_flag <= _result) ? \
6293 ((u32)(_input & _flag) * (_result / _flag)) : \
6294 ((u32)(_input & _flag) / (_flag / _result)))
6295
6296static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
9a799d71 6297{
d3d00239 6298 /* set type for advanced descriptor with frame checksum insertion */
472148c3
AD		 6299 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
6300 IXGBE_ADVTXD_DCMD_DEXT |
6301 IXGBE_ADVTXD_DCMD_IFCS;
9a799d71 6302
d3d00239 6303 /* set HW vlan bit if vlan is present */
472148c3
AD		 6304 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
6305 IXGBE_ADVTXD_DCMD_VLE);
3a6a4eda 6306
d3d00239 6307 /* set segmentation enable bits for TSO/FSO */
472148c3
AD		 6308 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
6309 IXGBE_ADVTXD_DCMD_TSE);
6310
6311 /* set timestamp bit if present */
6312 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
6313 IXGBE_ADVTXD_MAC_TSTAMP);
eacd73f7 6314
62748b7b 6315 /* insert frame checksum */
472148c3 6316 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
62748b7b 6317
d3d00239
AD		 6318 return cmd_type;
6319}
9a799d71 6320
729739b7
AD		 6321static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
6322 u32 tx_flags, unsigned int paylen)
d3d00239 6323{
472148c3 6324 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
9a799d71 6325
d3d00239 6326 /* enable L4 checksum for TSO and TX checksum offload */
472148c3
AD		 6327 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6328 IXGBE_TX_FLAGS_CSUM,
6329 IXGBE_ADVTXD_POPTS_TXSM);
9a799d71 6330
93f5b3c1 6331 /* enble IPv4 checksum for TSO */
472148c3
AD		 6332 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6333 IXGBE_TX_FLAGS_IPV4,
6334 IXGBE_ADVTXD_POPTS_IXSM);
9a799d71 6335
7f9643fd
AD		 6336 /*
6337 * Check Context must be set if Tx switch is enabled, which it
6338 * always is for case where virtual functions are running
6339 */
472148c3
AD		 6340 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6341 IXGBE_TX_FLAGS_CC,
6342 IXGBE_ADVTXD_CC);
7f9643fd 6343
472148c3 6344 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
d3d00239 6345}
44df32c5 6346
d3d00239
AD		 6347#define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6348 IXGBE_TXD_CMD_RS)
6349
6350static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
d3d00239 6351 struct ixgbe_tx_buffer *first,
d3d00239
AD		 6352 const u8 hdr_len)
6353{
fd0db0ed 6354 struct sk_buff *skb = first->skb;
729739b7 6355 struct ixgbe_tx_buffer *tx_buffer;
d3d00239 6356 union ixgbe_adv_tx_desc *tx_desc;
ec718254
AD		 6357 struct skb_frag_struct *frag;
6358 dma_addr_t dma;
6359 unsigned int data_len, size;
244e27ad 6360 u32 tx_flags = first->tx_flags;
472148c3 6361 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
d3d00239 6362 u16 i = tx_ring->next_to_use;
d3d00239 6363
729739b7
AD		 6364 tx_desc = IXGBE_TX_DESC(tx_ring, i);
6365
ec718254
AD		 6366 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
6367
6368 size = skb_headlen(skb);
6369 data_len = skb->data_len;
729739b7 6370
d3d00239
AD		 6371#ifdef IXGBE_FCOE
6372 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
729739b7 6373 if (data_len < sizeof(struct fcoe_crc_eof)) {
d3d00239
AD		 6374 size -= sizeof(struct fcoe_crc_eof) - data_len;
6375 data_len = 0;
729739b7
AD		 6376 } else {
6377 data_len -= sizeof(struct fcoe_crc_eof);
9a799d71
AK		 6378 }
6379 }
44df32c5 6380
d3d00239 6381#endif
729739b7 6382 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
8ad494b0 6383
ec718254 6384 tx_buffer = first;
9a799d71 6385
ec718254
AD		 6386 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
6387 if (dma_mapping_error(tx_ring->dev, dma))
6388 goto dma_error;
6389
6390 /* record length, and DMA address */
6391 dma_unmap_len_set(tx_buffer, len, size);
6392 dma_unmap_addr_set(tx_buffer, dma, dma);
6393
6394 tx_desc->read.buffer_addr = cpu_to_le64(dma);
e5a43549 6395
729739b7 6396 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
d3d00239 6397 tx_desc->read.cmd_type_len =
472148c3 6398 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
e5a43549 6399
d3d00239 6400 i++;
729739b7 6401 tx_desc++;
d3d00239 6402 if (i == tx_ring->count) {
e4f74028 6403 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
d3d00239
AD		 6404 i = 0;
6405 }
ec718254 6406 tx_desc->read.olinfo_status = 0;
729739b7
AD		 6407
6408 dma += IXGBE_MAX_DATA_PER_TXD;
6409 size -= IXGBE_MAX_DATA_PER_TXD;
6410
6411 tx_desc->read.buffer_addr = cpu_to_le64(dma);
d3d00239 6412 }
e5a43549 6413
729739b7
AD		 6414 if (likely(!data_len))
6415 break;
9a799d71 6416
472148c3 6417 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
9a799d71 6418
729739b7
AD		 6419 i++;
6420 tx_desc++;
6421 if (i == tx_ring->count) {
6422 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6423 i = 0;
6424 }
ec718254 6425 tx_desc->read.olinfo_status = 0;
9a799d71 6426
d3d00239 6427#ifdef IXGBE_FCOE
9e903e08 6428 size = min_t(unsigned int, data_len, skb_frag_size(frag));
d3d00239 6429#else
9e903e08 6430 size = skb_frag_size(frag);
d3d00239
AD		 6431#endif
6432 data_len -= size;
9a799d71 6433
729739b7
AD		 6434 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
6435 DMA_TO_DEVICE);
9a799d71 6436
729739b7 6437 tx_buffer = &tx_ring->tx_buffer_info[i];
729739b7 6438 }
9a799d71 6439
729739b7 6440 /* write last descriptor with RS and EOP bits */
472148c3
AD		 6441 cmd_type |= size | IXGBE_TXD_CMD;
6442 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
eacd73f7 6443
091a6246 6444 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
b2d96e0a 6445
d3d00239
AD		 6446 /* set the timestamp */
6447 first->time_stamp = jiffies;
9a799d71
AK		 6448
6449 /*
729739b7
AD		 6450 * Force memory writes to complete before letting h/w know there
6451 * are new descriptors to fetch. (Only applicable for weak-ordered
6452 * memory model archs, such as IA-64).
6453 *
6454 * We also need this memory barrier to make certain all of the
6455 * status bits have been updated before next_to_watch is written.
9a799d71
AK		 6456 */
6457 wmb();
6458
d3d00239
AD		 6459 /* set next_to_watch value indicating a packet is present */
6460 first->next_to_watch = tx_desc;
6461
729739b7
AD		 6462 i++;
6463 if (i == tx_ring->count)
6464 i = 0;
6465
6466 tx_ring->next_to_use = i;
6467
d3d00239 6468 /* notify HW of packet */
84ea2591 6469 writel(i, tx_ring->tail);
d3d00239
AD		 6470
6471 return;
6472dma_error:
729739b7 6473 dev_err(tx_ring->dev, "TX DMA map failed\n");
d3d00239
AD		 6474
6475 /* clear dma mappings for failed tx_buffer_info map */
6476 for (;;) {
729739b7
AD		 6477 tx_buffer = &tx_ring->tx_buffer_info[i];
6478 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
6479 if (tx_buffer == first)
d3d00239
AD		 6480 break;
6481 if (i == 0)
6482 i = tx_ring->count;
6483 i--;
6484 }
6485
d3d00239 6486 tx_ring->next_to_use = i;
9a799d71
AK		 6487}
6488
fd0db0ed 6489static void ixgbe_atr(struct ixgbe_ring *ring,
244e27ad 6490 struct ixgbe_tx_buffer *first)
69830529
AD		 6491{
6492 struct ixgbe_q_vector *q_vector = ring->q_vector;
6493 union ixgbe_atr_hash_dword input = { .dword = 0 };
6494 union ixgbe_atr_hash_dword common = { .dword = 0 };
6495 union {
6496 unsigned char *network;
6497 struct iphdr *ipv4;
6498 struct ipv6hdr *ipv6;
6499 } hdr;
ee9e0f0b 6500 struct tcphdr *th;
905e4a41 6501 __be16 vlan_id;
c4cf55e5 6502
69830529
AD		 6503 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6504 if (!q_vector)
6505 return;
6506
6507 /* do nothing if sampling is disabled */
6508 if (!ring->atr_sample_rate)
d3ead241 6509 return;
c4cf55e5 6510
69830529 6511 ring->atr_count++;
c4cf55e5 6512
69830529 6513 /* snag network header to get L4 type and address */
fd0db0ed 6514 hdr.network = skb_network_header(first->skb);
69830529
AD		 6515
6516 /* Currently only IPv4/IPv6 with TCP is supported */
244e27ad 6517 if ((first->protocol != __constant_htons(ETH_P_IPV6) ||
69830529 6518 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
244e27ad 6519 (first->protocol != __constant_htons(ETH_P_IP) ||
69830529
AD		 6520 hdr.ipv4->protocol != IPPROTO_TCP))
6521 return;
ee9e0f0b 6522
fd0db0ed 6523 th = tcp_hdr(first->skb);
c4cf55e5 6524
66f32a8b
AD		 6525 /* skip this packet since it is invalid or the socket is closing */
6526 if (!th || th->fin)
69830529
AD		 6527 return;
6528
6529 /* sample on all syn packets or once every atr sample count */
6530 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6531 return;
6532
6533 /* reset sample count */
6534 ring->atr_count = 0;
6535
244e27ad 6536 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
69830529
AD		 6537
6538 /*
6539 * src and dst are inverted, think how the receiver sees them
6540 *
6541 * The input is broken into two sections, a non-compressed section
6542 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6543 * is XORed together and stored in the compressed dword.
6544 */
6545 input.formatted.vlan_id = vlan_id;
6546
6547 /*
6548 * since src port and flex bytes occupy the same word XOR them together
6549 * and write the value to source port portion of compressed dword
6550 */
244e27ad 6551 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
69830529
AD		 6552 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6553 else
244e27ad 6554 common.port.src ^= th->dest ^ first->protocol;
69830529
AD		 6555 common.port.dst ^= th->source;
6556
244e27ad 6557 if (first->protocol == __constant_htons(ETH_P_IP)) {
69830529
AD		 6558 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6559 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6560 } else {
6561 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6562 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6563 hdr.ipv6->saddr.s6_addr32[1] ^
6564 hdr.ipv6->saddr.s6_addr32[2] ^
6565 hdr.ipv6->saddr.s6_addr32[3] ^
6566 hdr.ipv6->daddr.s6_addr32[0] ^
6567 hdr.ipv6->daddr.s6_addr32[1] ^
6568 hdr.ipv6->daddr.s6_addr32[2] ^
6569 hdr.ipv6->daddr.s6_addr32[3];
6570 }
c4cf55e5
PWJ		 6571
6572 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
69830529
AD		 6573 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6574 input, common, ring->queue_index);
c4cf55e5
PWJ		 6575}
6576
63544e9c 6577static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
e092be60 6578{
fc77dc3c 6579 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
e092be60
AV		 6580 /* Herbert's original patch had:
6581 * smp_mb__after_netif_stop_queue();
6582 * but since that doesn't exist yet, just open code it. */
6583 smp_mb();
6584
6585 /* We need to check again in a case another CPU has just
6586 * made room available. */
7d4987de 6587 if (likely(ixgbe_desc_unused(tx_ring) < size))
e092be60
AV		 6588 return -EBUSY;
6589
6590 /* A reprieve! - use start_queue because it doesn't call schedule */
fc77dc3c 6591 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
5b7da515 6592 ++tx_ring->tx_stats.restart_queue;
e092be60
AV		 6593 return 0;
6594}
6595
82d4e46e 6596static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
e092be60 6597{
7d4987de 6598 if (likely(ixgbe_desc_unused(tx_ring) >= size))
e092be60 6599 return 0;
fc77dc3c 6600 return __ixgbe_maybe_stop_tx(tx_ring, size);
e092be60
AV		 6601}
6602
97488bd1 6603#ifdef IXGBE_FCOE
09a3b1f8
SH		 6604static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6605{
97488bd1
AD		 6606 struct ixgbe_adapter *adapter;
6607 struct ixgbe_ring_feature *f;
6608 int txq;
5e09a105 6609
97488bd1
AD		 6610 /*
6611 * only execute the code below if protocol is FCoE
6612 * or FIP and we have FCoE enabled on the adapter
6613 */
6614 switch (vlan_get_protocol(skb)) {
6615 case __constant_htons(ETH_P_FCOE):
6616 case __constant_htons(ETH_P_FIP):
6617 adapter = netdev_priv(dev);
c087663e 6618
97488bd1
AD		 6619 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6620 break;
6621 default:
6622 return __netdev_pick_tx(dev, skb);
6623 }
c087663e 6624
97488bd1 6625 f = &adapter->ring_feature[RING_F_FCOE];
c087663e 6626
97488bd1
AD		 6627 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6628 smp_processor_id();
56075a98 6629
97488bd1
AD		 6630 while (txq >= f->indices)
6631 txq -= f->indices;
c4cf55e5 6632
97488bd1 6633 return txq + f->offset;
09a3b1f8
SH		 6634}
6635
97488bd1 6636#endif
fc77dc3c 6637netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
84418e3b
AD		 6638 struct ixgbe_adapter *adapter,
6639 struct ixgbe_ring *tx_ring)
9a799d71 6640{
d3d00239 6641 struct ixgbe_tx_buffer *first;
5f715823 6642 int tso;
d3d00239 6643 u32 tx_flags = 0;
a535c30e 6644 unsigned short f;
a535c30e 6645 u16 count = TXD_USE_COUNT(skb_headlen(skb));
66f32a8b 6646 __be16 protocol = skb->protocol;
63544e9c 6647 u8 hdr_len = 0;
5e09a105 6648
a535c30e
AD		 6649 /*
6650 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
24ddd967 6651 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
a535c30e
AD		 6652 * + 2 desc gap to keep tail from touching head,
6653 * + 1 desc for context descriptor,
6654 * otherwise try next time
6655 */
a535c30e
AD		 6656 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6657 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
7f66162b 6658
a535c30e
AD		 6659 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6660 tx_ring->tx_stats.tx_busy++;
6661 return NETDEV_TX_BUSY;
6662 }
6663
fd0db0ed
AD		 6664 /* record the location of the first descriptor for this packet */
6665 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6666 first->skb = skb;
091a6246
AD		 6667 first->bytecount = skb->len;
6668 first->gso_segs = 1;
fd0db0ed 6669
66f32a8b 6670 /* if we have a HW VLAN tag being added default to the HW one */
eab6d18d 6671 if (vlan_tx_tag_present(skb)) {
66f32a8b
AD		 6672 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6673 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6674 /* else if it is a SW VLAN check the next protocol and store the tag */
6675 } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6676 struct vlan_hdr *vhdr, _vhdr;
6677 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6678 if (!vhdr)
6679 goto out_drop;
6680
6681 protocol = vhdr->h_vlan_encapsulated_proto;
9e0c5648
AD		 6682 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
6683 IXGBE_TX_FLAGS_VLAN_SHIFT;
66f32a8b
AD		 6684 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6685 }
6686
aa7bd467
JK		 6687 skb_tx_timestamp(skb);
6688
3a6a4eda
JK		 6689 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
6690 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
6691 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
891dc082
JK		 6692
6693 /* schedule check for Tx timestamp */
6694 adapter->ptp_tx_skb = skb_get(skb);
6695 adapter->ptp_tx_start = jiffies;
6696 schedule_work(&adapter->ptp_tx_work);
3a6a4eda 6697 }
3a6a4eda 6698
9e0c5648
AD		 6699#ifdef CONFIG_PCI_IOV
6700 /*
6701 * Use the l2switch_enable flag - would be false if the DMA
6702 * Tx switch had been disabled.
6703 */
6704 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
472148c3 6705 tx_flags |= IXGBE_TX_FLAGS_CC;
9e0c5648
AD		 6706
6707#endif
32701dc2 6708 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
66f32a8b 6709 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
09dca476
AD		 6710 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6711 (skb->priority != TC_PRIO_CONTROL))) {
66f32a8b 6712 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
32701dc2
JF		 6713 tx_flags |= (skb->priority & 0x7) <<
6714 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
66f32a8b
AD		 6715 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6716 struct vlan_ethhdr *vhdr;
6717 if (skb_header_cloned(skb) &&
6718 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6719 goto out_drop;
6720 vhdr = (struct vlan_ethhdr *)skb->data;
6721 vhdr->h_vlan_TCI = htons(tx_flags >>
6722 IXGBE_TX_FLAGS_VLAN_SHIFT);
6723 } else {
6724 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
2f90b865 6725 }
9a799d71 6726 }
eacd73f7 6727
244e27ad
AD		 6728 /* record initial flags and protocol */
6729 first->tx_flags = tx_flags;
6730 first->protocol = protocol;
6731
eacd73f7 6732#ifdef IXGBE_FCOE
66f32a8b
AD		 6733 /* setup tx offload for FCoE */
6734 if ((protocol == __constant_htons(ETH_P_FCOE)) &&
a58915c7 6735 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
244e27ad 6736 tso = ixgbe_fso(tx_ring, first, &hdr_len);
897ab156
AD		 6737 if (tso < 0)
6738 goto out_drop;
9a799d71 6739
66f32a8b 6740 goto xmit_fcoe;
eacd73f7 6741 }
9a799d71 6742
66f32a8b 6743#endif /* IXGBE_FCOE */
244e27ad 6744 tso = ixgbe_tso(tx_ring, first, &hdr_len);
66f32a8b 6745 if (tso < 0)
897ab156 6746 goto out_drop;
244e27ad
AD		 6747 else if (!tso)
6748 ixgbe_tx_csum(tx_ring, first);
66f32a8b
AD		 6749
6750 /* add the ATR filter if ATR is on */
6751 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
244e27ad 6752 ixgbe_atr(tx_ring, first);
66f32a8b
AD		 6753
6754#ifdef IXGBE_FCOE
6755xmit_fcoe:
6756#endif /* IXGBE_FCOE */
244e27ad 6757 ixgbe_tx_map(tx_ring, first, hdr_len);
d3d00239
AD		 6758
6759 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
9a799d71
AK		 6760
6761 return NETDEV_TX_OK;
897ab156
AD		 6762
6763out_drop:
fd0db0ed
AD		 6764 dev_kfree_skb_any(first->skb);
6765 first->skb = NULL;
6766
897ab156 6767 return NETDEV_TX_OK;
9a799d71
AK		 6768}
6769
a50c29dd
AD		 6770static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6771 struct net_device *netdev)
84418e3b
AD		 6772{
6773 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6774 struct ixgbe_ring *tx_ring;
6775
a50c29dd
AD		 6776 /*
6777 * The minimum packet size for olinfo paylen is 17 so pad the skb
6778 * in order to meet this minimum size requirement.
6779 */
f73332fc
SH		 6780 if (unlikely(skb->len < 17)) {
6781 if (skb_pad(skb, 17 - skb->len))
a50c29dd
AD		 6782 return NETDEV_TX_OK;
6783 skb->len = 17;
71a49f77 6784 skb_set_tail_pointer(skb, 17);
a50c29dd
AD		 6785 }
6786
84418e3b 6787 tx_ring = adapter->tx_ring[skb->queue_mapping];
fc77dc3c 6788 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
84418e3b
AD		 6789}
6790
9a799d71
AK		 6791/**
6792 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6793 * @netdev: network interface device structure
6794 * @p: pointer to an address structure
6795 *
6796 * Returns 0 on success, negative on failure
6797 **/
6798static int ixgbe_set_mac(struct net_device *netdev, void *p)
6799{
6800 struct ixgbe_adapter *adapter = netdev_priv(netdev);
b4617240 6801 struct ixgbe_hw *hw = &adapter->hw;
9a799d71
AK		 6802 struct sockaddr *addr = p;
6803
6804 if (!is_valid_ether_addr(addr->sa_data))
6805 return -EADDRNOTAVAIL;
6806
6807 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
b4617240 6808 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
9a799d71 6809
1d9c0bfd 6810 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
9a799d71
AK		 6811
6812 return 0;
6813}
6814
6b73e10d
BH		 6815static int
6816ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6817{
6818 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6819 struct ixgbe_hw *hw = &adapter->hw;
6820 u16 value;
6821 int rc;
6822
6823 if (prtad != hw->phy.mdio.prtad)
6824 return -EINVAL;
6825 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6826 if (!rc)
6827 rc = value;
6828 return rc;
6829}
6830
6831static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6832 u16 addr, u16 value)
6833{
6834 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6835 struct ixgbe_hw *hw = &adapter->hw;
6836
6837 if (prtad != hw->phy.mdio.prtad)
6838 return -EINVAL;
6839 return hw->phy.ops.write_reg(hw, addr, devad, value);
6840}
6841
6842static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6843{
6844 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6845
3a6a4eda 6846 switch (cmd) {
3a6a4eda
JK		 6847 case SIOCSHWTSTAMP:
6848 return ixgbe_ptp_hwtstamp_ioctl(adapter, req, cmd);
3a6a4eda
JK		 6849 default:
6850 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6851 }
6b73e10d
BH		 6852}
6853
0365e6e4
PW		 6854/**
6855 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
31278e71 6856 * netdev->dev_addrs
0365e6e4
PW		 6857 * @netdev: network interface device structure
6858 *
6859 * Returns non-zero on failure
6860 **/
6861static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6862{
6863 int err = 0;
6864 struct ixgbe_adapter *adapter = netdev_priv(dev);
7fa7c9dc 6865 struct ixgbe_hw *hw = &adapter->hw;
0365e6e4 6866
7fa7c9dc 6867 if (is_valid_ether_addr(hw->mac.san_addr)) {
0365e6e4 6868 rtnl_lock();
7fa7c9dc 6869 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
0365e6e4 6870 rtnl_unlock();
7fa7c9dc
AD		 6871
6872 /* update SAN MAC vmdq pool selection */
6873 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
0365e6e4
PW		 6874 }
6875 return err;
6876}
6877
6878/**
6879 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
31278e71 6880 * netdev->dev_addrs
0365e6e4
PW		 6881 * @netdev: network interface device structure
6882 *
6883 * Returns non-zero on failure
6884 **/
6885static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6886{
6887 int err = 0;
6888 struct ixgbe_adapter *adapter = netdev_priv(dev);
6889 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6890
6891 if (is_valid_ether_addr(mac->san_addr)) {
6892 rtnl_lock();
6893 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6894 rtnl_unlock();
6895 }
6896 return err;
6897}
6898
9a799d71
AK		 6899#ifdef CONFIG_NET_POLL_CONTROLLER
6900/*
6901 * Polling 'interrupt' - used by things like netconsole to send skbs
6902 * without having to re-enable interrupts. It's not called while
6903 * the interrupt routine is executing.
6904 */
6905static void ixgbe_netpoll(struct net_device *netdev)
6906{
6907 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8f9a7167 6908 int i;
9a799d71 6909
1a647bd2
AD		 6910 /* if interface is down do nothing */
6911 if (test_bit(__IXGBE_DOWN, &adapter->state))
6912 return;
6913
9a799d71 6914 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
8f9a7167 6915 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
49c7ffbe
AD		 6916 for (i = 0; i < adapter->num_q_vectors; i++)
6917 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
8f9a7167
PWJ		 6918 } else {
6919 ixgbe_intr(adapter->pdev->irq, netdev);
6920 }
9a799d71 6921 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
9a799d71 6922}
9a799d71 6923
581330ba 6924#endif
de1036b1
ED		 6925static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6926 struct rtnl_link_stats64 *stats)
6927{
6928 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6929 int i;
6930
1a51502b 6931 rcu_read_lock();
de1036b1 6932 for (i = 0; i < adapter->num_rx_queues; i++) {
1a51502b 6933 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
de1036b1
ED		 6934 u64 bytes, packets;
6935 unsigned int start;
6936
1a51502b
ED		 6937 if (ring) {
6938 do {
6939 start = u64_stats_fetch_begin_bh(&ring->syncp);
6940 packets = ring->stats.packets;
6941 bytes = ring->stats.bytes;
6942 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6943 stats->rx_packets += packets;
6944 stats->rx_bytes += bytes;
6945 }
de1036b1 6946 }
1ac9ad13
ED		 6947
6948 for (i = 0; i < adapter->num_tx_queues; i++) {
6949 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
6950 u64 bytes, packets;
6951 unsigned int start;
6952
6953 if (ring) {
6954 do {
6955 start = u64_stats_fetch_begin_bh(&ring->syncp);
6956 packets = ring->stats.packets;
6957 bytes = ring->stats.bytes;
6958 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6959 stats->tx_packets += packets;
6960 stats->tx_bytes += bytes;
6961 }
6962 }
1a51502b 6963 rcu_read_unlock();
de1036b1
ED		 6964 /* following stats updated by ixgbe_watchdog_task() */
6965 stats->multicast = netdev->stats.multicast;
6966 stats->rx_errors = netdev->stats.rx_errors;
6967 stats->rx_length_errors = netdev->stats.rx_length_errors;
6968 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6969 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6970 return stats;
6971}
6972
8af3c33f 6973#ifdef CONFIG_IXGBE_DCB
49ce9c2c
BH		 6974/**
6975 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
6976 * @adapter: pointer to ixgbe_adapter
8b1c0b24
JF		 6977 * @tc: number of traffic classes currently enabled
6978 *
6979 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
6980 * 802.1Q priority maps to a packet buffer that exists.
6981 */
6982static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
6983{
6984 struct ixgbe_hw *hw = &adapter->hw;
6985 u32 reg, rsave;
6986 int i;
6987
6988 /* 82598 have a static priority to TC mapping that can not
6989 * be changed so no validation is needed.
6990 */
6991 if (hw->mac.type == ixgbe_mac_82598EB)
6992 return;
6993
6994 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
6995 rsave = reg;
6996
6997 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
6998 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
6999
7000 /* If up2tc is out of bounds default to zero */
7001 if (up2tc > tc)
7002 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7003 }
7004
7005 if (reg != rsave)
7006 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7007
7008 return;
7009}
7010
02debdc9
AD		 7011/**
7012 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
7013 * @adapter: Pointer to adapter struct
7014 *
7015 * Populate the netdev user priority to tc map
7016 */
7017static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
7018{
7019 struct net_device *dev = adapter->netdev;
7020 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
7021 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
7022 u8 prio;
7023
7024 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
7025 u8 tc = 0;
7026
7027 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
7028 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
7029 else if (ets)
7030 tc = ets->prio_tc[prio];
7031
7032 netdev_set_prio_tc_map(dev, prio, tc);
7033 }
7034}
7035
cca73c59 7036#endif /* CONFIG_IXGBE_DCB */
49ce9c2c
BH		 7037/**
7038 * ixgbe_setup_tc - configure net_device for multiple traffic classes
8b1c0b24
JF		 7039 *
7040 * @netdev: net device to configure
7041 * @tc: number of traffic classes to enable
7042 */
7043int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7044{
8b1c0b24
JF		 7045 struct ixgbe_adapter *adapter = netdev_priv(dev);
7046 struct ixgbe_hw *hw = &adapter->hw;
8b1c0b24 7047
8b1c0b24 7048 /* Hardware supports up to 8 traffic classes */
4de2a022 7049 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
581330ba
AD		 7050 (hw->mac.type == ixgbe_mac_82598EB &&
7051 tc < MAX_TRAFFIC_CLASS))
8b1c0b24
JF		 7052 return -EINVAL;
7053
7054 /* Hardware has to reinitialize queues and interrupts to
52f33af8 7055 * match packet buffer alignment. Unfortunately, the
8b1c0b24
JF		 7056 * hardware is not flexible enough to do this dynamically.
7057 */
7058 if (netif_running(dev))
7059 ixgbe_close(dev);
7060 ixgbe_clear_interrupt_scheme(adapter);
7061
cca73c59 7062#ifdef CONFIG_IXGBE_DCB
e7589eab 7063 if (tc) {
8b1c0b24 7064 netdev_set_num_tc(dev, tc);
02debdc9
AD		 7065 ixgbe_set_prio_tc_map(adapter);
7066
e7589eab 7067 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
e7589eab 7068
943561d3
AD		 7069 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
7070 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
e7589eab 7071 adapter->hw.fc.requested_mode = ixgbe_fc_none;
943561d3 7072 }
e7589eab 7073 } else {
8b1c0b24 7074 netdev_reset_tc(dev);
02debdc9 7075
943561d3
AD		 7076 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7077 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
e7589eab
JF		 7078
7079 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
e7589eab
JF		 7080
7081 adapter->temp_dcb_cfg.pfc_mode_enable = false;
7082 adapter->dcb_cfg.pfc_mode_enable = false;
7083 }
7084
8b1c0b24 7085 ixgbe_validate_rtr(adapter, tc);
cca73c59
AD		 7086
7087#endif /* CONFIG_IXGBE_DCB */
7088 ixgbe_init_interrupt_scheme(adapter);
7089
8b1c0b24 7090 if (netif_running(dev))
cca73c59 7091 return ixgbe_open(dev);
8b1c0b24
JF		 7092
7093 return 0;
7094}
de1036b1 7095
da36b647
GR		 7096#ifdef CONFIG_PCI_IOV
7097void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
7098{
7099 struct net_device *netdev = adapter->netdev;
7100
7101 rtnl_lock();
da36b647 7102 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
da36b647
GR		 7103 rtnl_unlock();
7104}
7105
7106#endif
082757af
DS		 7107void ixgbe_do_reset(struct net_device *netdev)
7108{
7109 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7110
7111 if (netif_running(netdev))
7112 ixgbe_reinit_locked(adapter);
7113 else
7114 ixgbe_reset(adapter);
7115}
7116
c8f44aff 7117static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
567d2de2 7118 netdev_features_t features)
082757af
DS		 7119{
7120 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7121
082757af 7122 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
567d2de2
AD		 7123 if (!(features & NETIF_F_RXCSUM))
7124 features &= ~NETIF_F_LRO;
082757af 7125
567d2de2
AD		 7126 /* Turn off LRO if not RSC capable */
7127 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
7128 features &= ~NETIF_F_LRO;
8e2813f5 7129
567d2de2 7130 return features;
082757af
DS		 7131}
7132
c8f44aff 7133static int ixgbe_set_features(struct net_device *netdev,
567d2de2 7134 netdev_features_t features)
082757af
DS		 7135{
7136 struct ixgbe_adapter *adapter = netdev_priv(netdev);
567d2de2 7137 netdev_features_t changed = netdev->features ^ features;
082757af
DS		 7138 bool need_reset = false;
7139
082757af 7140 /* Make sure RSC matches LRO, reset if change */
567d2de2
AD		 7141 if (!(features & NETIF_F_LRO)) {
7142 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
082757af 7143 need_reset = true;
567d2de2
AD		 7144 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
7145 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
7146 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7147 if (adapter->rx_itr_setting == 1 ||
7148 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
7149 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
7150 need_reset = true;
7151 } else if ((changed ^ features) & NETIF_F_LRO) {
7152 e_info(probe, "rx-usecs set too low, "
7153 "disabling RSC\n");
082757af
DS		 7154 }
7155 }
7156
7157 /*
7158 * Check if Flow Director n-tuple support was enabled or disabled. If
7159 * the state changed, we need to reset.
7160 */
39cb681b
AD		 7161 switch (features & NETIF_F_NTUPLE) {
7162 case NETIF_F_NTUPLE:
567d2de2 7163 /* turn off ATR, enable perfect filters and reset */
39cb681b
AD		 7164 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
7165 need_reset = true;
7166
567d2de2
AD		 7167 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7168 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
39cb681b
AD		 7169 break;
7170 default:
7171 /* turn off perfect filters, enable ATR and reset */
7172 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7173 need_reset = true;
7174
7175 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7176
7177 /* We cannot enable ATR if SR-IOV is enabled */
7178 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7179 break;
7180
7181 /* We cannot enable ATR if we have 2 or more traffic classes */
7182 if (netdev_get_num_tc(netdev) > 1)
7183 break;
7184
7185 /* We cannot enable ATR if RSS is disabled */
7186 if (adapter->ring_feature[RING_F_RSS].limit <= 1)
7187 break;
7188
7189 /* A sample rate of 0 indicates ATR disabled */
7190 if (!adapter->atr_sample_rate)
7191 break;
7192
7193 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7194 break;
082757af
DS		 7195 }
7196
f646968f 7197 if (features & NETIF_F_HW_VLAN_CTAG_RX)
146d4cc9
JF		 7198 ixgbe_vlan_strip_enable(adapter);
7199 else
7200 ixgbe_vlan_strip_disable(adapter);
7201
3f2d1c0f
BG		 7202 if (changed & NETIF_F_RXALL)
7203 need_reset = true;
7204
567d2de2 7205 netdev->features = features;
082757af
DS		 7206 if (need_reset)
7207 ixgbe_do_reset(netdev);
7208
7209 return 0;
082757af
DS		 7210}
7211
edc7d573 7212static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
0f4b0add 7213 struct net_device *dev,
6b6e2725 7214 const unsigned char *addr,
0f4b0add
JF		 7215 u16 flags)
7216{
7217 struct ixgbe_adapter *adapter = netdev_priv(dev);
95447461
JF		 7218 int err;
7219
7220 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
faaf02d2 7221 return ndo_dflt_fdb_add(ndm, tb, dev, addr, flags);
0f4b0add 7222
b1ac1ef7
JF		 7223 /* Hardware does not support aging addresses so if a
7224 * ndm_state is given only allow permanent addresses
7225 */
7226 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
0f4b0add
JF		 7227 pr_info("%s: FDB only supports static addresses\n",
7228 ixgbe_driver_name);
7229 return -EINVAL;
7230 }
7231
46acc460 7232 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
95447461
JF		 7233 u32 rar_uc_entries = IXGBE_MAX_PF_MACVLANS;
7234
7235 if (netdev_uc_count(dev) < rar_uc_entries)
0f4b0add 7236 err = dev_uc_add_excl(dev, addr);
0f4b0add 7237 else
95447461
JF		 7238 err = -ENOMEM;
7239 } else if (is_multicast_ether_addr(addr)) {
7240 err = dev_mc_add_excl(dev, addr);
7241 } else {
7242 err = -EINVAL;
0f4b0add
JF		 7243 }
7244
7245 /* Only return duplicate errors if NLM_F_EXCL is set */
7246 if (err == -EEXIST && !(flags & NLM_F_EXCL))
7247 err = 0;
7248
7249 return err;
7250}
7251
815cccbf
JF		 7252static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
7253 struct nlmsghdr *nlh)
7254{
7255 struct ixgbe_adapter *adapter = netdev_priv(dev);
7256 struct nlattr *attr, *br_spec;
7257 int rem;
7258
7259 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7260 return -EOPNOTSUPP;
7261
7262 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
7263
7264 nla_for_each_nested(attr, br_spec, rem) {
7265 __u16 mode;
7266 u32 reg = 0;
7267
7268 if (nla_type(attr) != IFLA_BRIDGE_MODE)
7269 continue;
7270
7271 mode = nla_get_u16(attr);
9b735984 7272 if (mode == BRIDGE_MODE_VEPA) {
815cccbf 7273 reg = 0;
9b735984
GR		 7274 adapter->flags2 &= ~IXGBE_FLAG2_BRIDGE_MODE_VEB;
7275 } else if (mode == BRIDGE_MODE_VEB) {
815cccbf 7276 reg = IXGBE_PFDTXGSWC_VT_LBEN;
9b735984
GR		 7277 adapter->flags2 |= IXGBE_FLAG2_BRIDGE_MODE_VEB;
7278 } else
815cccbf
JF		 7279 return -EINVAL;
7280
7281 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, reg);
7282
7283 e_info(drv, "enabling bridge mode: %s\n",
7284 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
7285 }
7286
7287 return 0;
7288}
7289
7290static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
6cbdceeb
VY		 7291 struct net_device *dev,
7292 u32 filter_mask)
815cccbf
JF		 7293{
7294 struct ixgbe_adapter *adapter = netdev_priv(dev);
7295 u16 mode;
7296
7297 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7298 return 0;
7299
9b735984 7300 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
815cccbf
JF		 7301 mode = BRIDGE_MODE_VEB;
7302 else
7303 mode = BRIDGE_MODE_VEPA;
7304
7305 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
7306}
7307
0edc3527 7308static const struct net_device_ops ixgbe_netdev_ops = {
e8e9f696 7309 .ndo_open = ixgbe_open,
0edc3527 7310 .ndo_stop = ixgbe_close,
00829823 7311 .ndo_start_xmit = ixgbe_xmit_frame,
97488bd1 7312#ifdef IXGBE_FCOE
09a3b1f8 7313 .ndo_select_queue = ixgbe_select_queue,
97488bd1 7314#endif
581330ba 7315 .ndo_set_rx_mode = ixgbe_set_rx_mode,
0edc3527
SH		 7316 .ndo_validate_addr = eth_validate_addr,
7317 .ndo_set_mac_address = ixgbe_set_mac,
7318 .ndo_change_mtu = ixgbe_change_mtu,
7319 .ndo_tx_timeout = ixgbe_tx_timeout,
0edc3527
SH		 7320 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7321 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6b73e10d 7322 .ndo_do_ioctl = ixgbe_ioctl,
7f01648a
GR		 7323 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7324 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7325 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
581330ba 7326 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
7f01648a 7327 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
de1036b1 7328 .ndo_get_stats64 = ixgbe_get_stats64,
8af3c33f 7329#ifdef CONFIG_IXGBE_DCB
24095aa3 7330 .ndo_setup_tc = ixgbe_setup_tc,
8af3c33f 7331#endif
0edc3527
SH		 7332#ifdef CONFIG_NET_POLL_CONTROLLER
7333 .ndo_poll_controller = ixgbe_netpoll,
7334#endif
e0d1095a 7335#ifdef CONFIG_NET_RX_BUSY_POLL
8b80cda5 7336 .ndo_busy_poll = ixgbe_low_latency_recv,
5a85e737 7337#endif
332d4a7d
YZ		 7338#ifdef IXGBE_FCOE
7339 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
68a683cf 7340 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
332d4a7d 7341 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
8450ff8c
YZ		 7342 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7343 .ndo_fcoe_disable = ixgbe_fcoe_disable,
61a1fa10 7344 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
ea81875a 7345 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
332d4a7d 7346#endif /* IXGBE_FCOE */
082757af
DS		 7347 .ndo_set_features = ixgbe_set_features,
7348 .ndo_fix_features = ixgbe_fix_features,
0f4b0add 7349 .ndo_fdb_add = ixgbe_ndo_fdb_add,
815cccbf
JF		 7350 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
7351 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
0edc3527
SH		 7352};
7353
e027d1ae
JK		 7354/**
7355 * ixgbe_enumerate_functions - Get the number of ports this device has
7356 * @adapter: adapter structure
7357 *
7358 * This function enumerates the phsyical functions co-located on a single slot,
7359 * in order to determine how many ports a device has. This is most useful in
7360 * determining the required GT/s of PCIe bandwidth necessary for optimal
7361 * performance.
7362 **/
7363static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
7364{
7365 struct ixgbe_hw *hw = &adapter->hw;
7366 struct list_head *entry;
7367 int physfns = 0;
7368
7369 /* Some cards can not use the generic count PCIe functions method, and
7370 * so must be hardcoded to the correct value.
7371 */
7372 switch (hw->device_id) {
7373 case IXGBE_DEV_ID_82599_SFP_SF_QP:
8f58332b 7374 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
e027d1ae
JK		 7375 physfns = 4;
7376 break;
7377 default:
7378 list_for_each(entry, &adapter->pdev->bus_list) {
7379 struct pci_dev *pdev =
7380 list_entry(entry, struct pci_dev, bus_list);
7381 /* don't count virtual functions */
7382 if (!pdev->is_virtfn)
7383 physfns++;
7384 }
7385 }
7386
7387 return physfns;
7388}
7389
8e2813f5
JK		 7390/**
7391 * ixgbe_wol_supported - Check whether device supports WoL
7392 * @hw: hw specific details
7393 * @device_id: the device ID
7394 * @subdev_id: the subsystem device ID
7395 *
7396 * This function is used by probe and ethtool to determine
7397 * which devices have WoL support
7398 *
7399 **/
7400int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
7401 u16 subdevice_id)
7402{
7403 struct ixgbe_hw *hw = &adapter->hw;
7404 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
7405 int is_wol_supported = 0;
7406
7407 switch (device_id) {
7408 case IXGBE_DEV_ID_82599_SFP:
7409 /* Only these subdevices could supports WOL */
7410 switch (subdevice_id) {
7411 case IXGBE_SUBDEV_ID_82599_560FLR:
7412 /* only support first port */
7413 if (hw->bus.func != 0)
7414 break;
5700ff26 7415 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
8e2813f5 7416 case IXGBE_SUBDEV_ID_82599_SFP:
b6dfd939 7417 case IXGBE_SUBDEV_ID_82599_RNDC:
f8a06c2c 7418 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
979fe5f7 7419 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
8e2813f5
JK		 7420 is_wol_supported = 1;
7421 break;
7422 }
7423 break;
5daebbb0
DS		 7424 case IXGBE_DEV_ID_82599EN_SFP:
7425 /* Only this subdevice supports WOL */
7426 switch (subdevice_id) {
7427 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
7428 is_wol_supported = 1;
7429 break;
7430 }
7431 break;
8e2813f5
JK		 7432 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7433 /* All except this subdevice support WOL */
7434 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7435 is_wol_supported = 1;
7436 break;
7437 case IXGBE_DEV_ID_82599_KX4:
7438 is_wol_supported = 1;
7439 break;
7440 case IXGBE_DEV_ID_X540T:
df376f0d 7441 case IXGBE_DEV_ID_X540T1:
8e2813f5
JK		 7442 /* check eeprom to see if enabled wol */
7443 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
7444 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
7445 (hw->bus.func == 0))) {
7446 is_wol_supported = 1;
7447 }
7448 break;
7449 }
7450
7451 return is_wol_supported;
7452}
7453
9a799d71
AK		 7454/**
7455 * ixgbe_probe - Device Initialization Routine
7456 * @pdev: PCI device information struct
7457 * @ent: entry in ixgbe_pci_tbl
7458 *
7459 * Returns 0 on success, negative on failure
7460 *
7461 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7462 * The OS initialization, configuring of the adapter private structure,
7463 * and a hardware reset occur.
7464 **/
1dd06ae8 7465static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9a799d71
AK		 7466{
7467 struct net_device *netdev;
7468 struct ixgbe_adapter *adapter = NULL;
7469 struct ixgbe_hw *hw;
7470 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
9a799d71 7471 static int cards_found;
e027d1ae 7472 int i, err, pci_using_dac, expected_gts;
d3cb9869 7473 unsigned int indices = MAX_TX_QUEUES;
289700db 7474 u8 part_str[IXGBE_PBANUM_LENGTH];
eacd73f7
YZ		 7475#ifdef IXGBE_FCOE
7476 u16 device_caps;
7477#endif
289700db 7478 u32 eec;
9a799d71 7479
bded64a7
AG		 7480 /* Catch broken hardware that put the wrong VF device ID in
7481 * the PCIe SR-IOV capability.
7482 */
7483 if (pdev->is_virtfn) {
7484 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7485 pci_name(pdev), pdev->vendor, pdev->device);
7486 return -EINVAL;
7487 }
7488
9ce77666 7489 err = pci_enable_device_mem(pdev);
9a799d71
AK		 7490 if (err)
7491 return err;
7492
1b507730
NN		 7493 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7494 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
9a799d71
AK		 7495 pci_using_dac = 1;
7496 } else {
1b507730 7497 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
9a799d71 7498 if (err) {
1b507730
NN		 7499 err = dma_set_coherent_mask(&pdev->dev,
7500 DMA_BIT_MASK(32));
9a799d71 7501 if (err) {
b8bc0421
DC		 7502 dev_err(&pdev->dev,
7503 "No usable DMA configuration, aborting\n");
9a799d71
AK		 7504 goto err_dma;
7505 }
7506 }
7507 pci_using_dac = 0;
7508 }
7509
9ce77666 7510 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
e8e9f696 7511 IORESOURCE_MEM), ixgbe_driver_name);
9a799d71 7512 if (err) {
b8bc0421
DC		 7513 dev_err(&pdev->dev,
7514 "pci_request_selected_regions failed 0x%x\n", err);
9a799d71
AK		 7515 goto err_pci_reg;
7516 }
7517
19d5afd4 7518 pci_enable_pcie_error_reporting(pdev);
6fabd715 7519
9a799d71 7520 pci_set_master(pdev);
fb3b27bc 7521 pci_save_state(pdev);
9a799d71 7522
d3cb9869 7523 if (ii->mac == ixgbe_mac_82598EB) {
e901acd6 7524#ifdef CONFIG_IXGBE_DCB
d3cb9869
AD		 7525 /* 8 TC w/ 4 queues per TC */
7526 indices = 4 * MAX_TRAFFIC_CLASS;
7527#else
7528 indices = IXGBE_MAX_RSS_INDICES;
e901acd6 7529#endif
d3cb9869 7530 }
e901acd6 7531
c85a2618 7532 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
9a799d71
AK		 7533 if (!netdev) {
7534 err = -ENOMEM;
7535 goto err_alloc_etherdev;
7536 }
7537
9a799d71
AK		 7538 SET_NETDEV_DEV(netdev, &pdev->dev);
7539
9a799d71 7540 adapter = netdev_priv(netdev);
c60fbb00 7541 pci_set_drvdata(pdev, adapter);
9a799d71
AK		 7542
7543 adapter->netdev = netdev;
7544 adapter->pdev = pdev;
7545 hw = &adapter->hw;
7546 hw->back = adapter;
b3f4d599 7547 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
9a799d71 7548
05857980 7549 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
e8e9f696 7550 pci_resource_len(pdev, 0));
9a799d71
AK		 7551 if (!hw->hw_addr) {
7552 err = -EIO;
7553 goto err_ioremap;
7554 }
7555
0edc3527 7556 netdev->netdev_ops = &ixgbe_netdev_ops;
9a799d71 7557 ixgbe_set_ethtool_ops(netdev);
9a799d71 7558 netdev->watchdog_timeo = 5 * HZ;
9fe93afd 7559 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
9a799d71 7560
9a799d71
AK		 7561 adapter->bd_number = cards_found;
7562
9a799d71
AK		 7563 /* Setup hw api */
7564 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
021230d4 7565 hw->mac.type = ii->mac;
9a799d71 7566
c44ade9e
JB		 7567 /* EEPROM */
7568 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7569 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7570 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7571 if (!(eec & (1 << 8)))
7572 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7573
7574 /* PHY */
7575 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
c4900be0 7576 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6b73e10d
BH		 7577 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7578 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7579 hw->phy.mdio.mmds = 0;
7580 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7581 hw->phy.mdio.dev = netdev;
7582 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7583 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
c4900be0 7584
8ca783ab 7585 ii->get_invariants(hw);
9a799d71
AK		 7586
7587 /* setup the private structure */
7588 err = ixgbe_sw_init(adapter);
7589 if (err)
7590 goto err_sw_init;
7591
0b2679d6
DS		 7592 /* Cache if MNG FW is up so we don't have to read the REG later */
7593 if (hw->mac.ops.mng_fw_enabled)
7594 hw->mng_fw_enabled = hw->mac.ops.mng_fw_enabled(hw);
7595
e86bff0e 7596 /* Make it possible the adapter to be woken up via WOL */
b93a2226
DS		 7597 switch (adapter->hw.mac.type) {
7598 case ixgbe_mac_82599EB:
7599 case ixgbe_mac_X540:
e86bff0e 7600 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
b93a2226
DS		 7601 break;
7602 default:
7603 break;
7604 }
e86bff0e 7605
bf069c97
DS		 7606 /*
7607 * If there is a fan on this device and it has failed log the
7608 * failure.
7609 */
7610 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7611 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7612 if (esdp & IXGBE_ESDP_SDP1)
396e799c 7613 e_crit(probe, "Fan has stopped, replace the adapter\n");
bf069c97
DS		 7614 }
7615
8ef78adc
PWJ		 7616 if (allow_unsupported_sfp)
7617 hw->allow_unsupported_sfp = allow_unsupported_sfp;
7618
c44ade9e 7619 /* reset_hw fills in the perm_addr as well */
119fc60a 7620 hw->phy.reset_if_overtemp = true;
c44ade9e 7621 err = hw->mac.ops.reset_hw(hw);
119fc60a 7622 hw->phy.reset_if_overtemp = false;
8ca783ab
DS		 7623 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7624 hw->mac.type == ixgbe_mac_82598EB) {
8ca783ab
DS		 7625 err = 0;
7626 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
1b1bf31a
DS		 7627 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
7628 e_dev_err("Reload the driver after installing a supported module.\n");
04f165ef
PW		 7629 goto err_sw_init;
7630 } else if (err) {
849c4542 7631 e_dev_err("HW Init failed: %d\n", err);
c44ade9e
JB		 7632 goto err_sw_init;
7633 }
7634
99d74487 7635#ifdef CONFIG_PCI_IOV
60a1a680
GR		 7636 /* SR-IOV not supported on the 82598 */
7637 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7638 goto skip_sriov;
7639 /* Mailbox */
7640 ixgbe_init_mbx_params_pf(hw);
7641 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
7642 ixgbe_enable_sriov(adapter);
43dc4e01 7643 pci_sriov_set_totalvfs(pdev, 63);
60a1a680 7644skip_sriov:
1cdd1ec8 7645
99d74487 7646#endif
396e799c 7647 netdev->features = NETIF_F_SG |
e8e9f696 7648 NETIF_F_IP_CSUM |
082757af 7649 NETIF_F_IPV6_CSUM |
f646968f
PM		 7650 NETIF_F_HW_VLAN_CTAG_TX |
7651 NETIF_F_HW_VLAN_CTAG_RX |
7652 NETIF_F_HW_VLAN_CTAG_FILTER |
082757af
DS		 7653 NETIF_F_TSO |
7654 NETIF_F_TSO6 |
082757af
DS		 7655 NETIF_F_RXHASH |
7656 NETIF_F_RXCSUM;
9a799d71 7657
082757af 7658 netdev->hw_features = netdev->features;
ad31c402 7659
58be7666
DS		 7660 switch (adapter->hw.mac.type) {
7661 case ixgbe_mac_82599EB:
7662 case ixgbe_mac_X540:
45a5ead0 7663 netdev->features |= NETIF_F_SCTP_CSUM;
082757af
DS		 7664 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7665 NETIF_F_NTUPLE;
58be7666
DS		 7666 break;
7667 default:
7668 break;
7669 }
45a5ead0 7670
3f2d1c0f
BG		 7671 netdev->hw_features |= NETIF_F_RXALL;
7672
ad31c402
JK		 7673 netdev->vlan_features |= NETIF_F_TSO;
7674 netdev->vlan_features |= NETIF_F_TSO6;
22f32b7a 7675 netdev->vlan_features |= NETIF_F_IP_CSUM;
cd1da503 7676 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
ad31c402
JK		 7677 netdev->vlan_features |= NETIF_F_SG;
7678
01789349 7679 netdev->priv_flags |= IFF_UNICAST_FLT;
f43f313e 7680 netdev->priv_flags |= IFF_SUPP_NOFCS;
01789349 7681
7a6b6f51 7682#ifdef CONFIG_IXGBE_DCB
2f90b865
AD		 7683 netdev->dcbnl_ops = &dcbnl_ops;
7684#endif
7685
eacd73f7 7686#ifdef IXGBE_FCOE
0d551589 7687 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
d3cb9869
AD		 7688 unsigned int fcoe_l;
7689
eacd73f7
YZ		 7690 if (hw->mac.ops.get_device_caps) {
7691 hw->mac.ops.get_device_caps(hw, &device_caps);
0d551589
YZ		 7692 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7693 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
eacd73f7 7694 }
7c8ae65a 7695
d3cb9869
AD		 7696
7697 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
7698 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
7c8ae65a 7699
a58915c7
AD		 7700 netdev->features |= NETIF_F_FSO |
7701 NETIF_F_FCOE_CRC;
7702
7c8ae65a
AD		 7703 netdev->vlan_features |= NETIF_F_FSO |
7704 NETIF_F_FCOE_CRC |
7705 NETIF_F_FCOE_MTU;
5e09d7f6 7706 }
eacd73f7 7707#endif /* IXGBE_FCOE */
7b872a55 7708 if (pci_using_dac) {
9a799d71 7709 netdev->features |= NETIF_F_HIGHDMA;
7b872a55
YZ		 7710 netdev->vlan_features |= NETIF_F_HIGHDMA;
7711 }
9a799d71 7712
082757af
DS		 7713 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7714 netdev->hw_features |= NETIF_F_LRO;
0c19d6af 7715 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
f8212f97
AD		 7716 netdev->features |= NETIF_F_LRO;
7717
9a799d71 7718 /* make sure the EEPROM is good */
c44ade9e 7719 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
849c4542 7720 e_dev_err("The EEPROM Checksum Is Not Valid\n");
9a799d71 7721 err = -EIO;
35937c05 7722 goto err_sw_init;
9a799d71
AK		 7723 }
7724
7725 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
9a799d71 7726
aaeb6cdf 7727 if (!is_valid_ether_addr(netdev->dev_addr)) {
849c4542 7728 e_dev_err("invalid MAC address\n");
9a799d71 7729 err = -EIO;
35937c05 7730 goto err_sw_init;
9a799d71
AK		 7731 }
7732
7086400d 7733 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
581330ba 7734 (unsigned long) adapter);
9a799d71 7735
7086400d
AD		 7736 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7737 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
9a799d71 7738
021230d4
AV		 7739 err = ixgbe_init_interrupt_scheme(adapter);
7740 if (err)
7741 goto err_sw_init;
9a799d71 7742
8e2813f5 7743 /* WOL not supported for all devices */
c23f5b6b 7744 adapter->wol = 0;
8e2813f5 7745 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
6b92b0ba 7746 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
b8f83638 7747 pdev->subsystem_device);
6b92b0ba 7748 if (hw->wol_enabled)
9417c464 7749 adapter->wol = IXGBE_WUFC_MAG;
c23f5b6b 7750
e8e26350
PW		 7751 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7752
15e5209f
ET		 7753 /* save off EEPROM version number */
7754 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
7755 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
7756
04f165ef
PW		 7757 /* pick up the PCI bus settings for reporting later */
7758 hw->mac.ops.get_bus_info(hw);
e027d1ae 7759 if (ixgbe_pcie_from_parent(hw))
b8e82001 7760 ixgbe_get_parent_bus_info(adapter);
04f165ef 7761
9a799d71 7762 /* print bus type/speed/width info */
849c4542 7763 e_dev_info("(PCI Express:%s:%s) %pM\n",
e8710a5f
JK		 7764 (hw->bus.speed == ixgbe_bus_speed_8000 ? "8.0GT/s" :
7765 hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
6716344c 7766 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
e8e9f696
JP		 7767 "Unknown"),
7768 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7769 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7770 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7771 "Unknown"),
7772 netdev->dev_addr);
289700db
DS		 7773
7774 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7775 if (err)
9fe93afd 7776 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
e8e26350 7777 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
289700db 7778 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
849c4542 7779 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
289700db 7780 part_str);
e8e26350 7781 else
289700db
DS		 7782 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7783 hw->mac.type, hw->phy.type, part_str);
9a799d71 7784
e027d1ae
JK		 7785 /* calculate the expected PCIe bandwidth required for optimal
7786 * performance. Note that some older parts will never have enough
7787 * bandwidth due to being older generation PCIe parts. We clamp these
7788 * parts to ensure no warning is displayed if it can't be fixed.
7789 */
7790 switch (hw->mac.type) {
7791 case ixgbe_mac_82598EB:
7792 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
7793 break;
7794 default:
7795 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
7796 break;
0c254d86 7797 }
e027d1ae 7798 ixgbe_check_minimum_link(adapter, expected_gts);
0c254d86 7799
9a799d71 7800 /* reset the hardware with the new settings */
794caeb2 7801 err = hw->mac.ops.start_hw(hw);
794caeb2
PWJ		 7802 if (err == IXGBE_ERR_EEPROM_VERSION) {
7803 /* We are running on a pre-production device, log a warning */
849c4542
ET		 7804 e_dev_warn("This device is a pre-production adapter/LOM. "
7805 "Please be aware there may be issues associated "
7806 "with your hardware. If you are experiencing "
7807 "problems please contact your Intel or hardware "
7808 "representative who provided you with this "
7809 "hardware.\n");
794caeb2 7810 }
9a799d71
AK		 7811 strcpy(netdev->name, "eth%d");
7812 err = register_netdev(netdev);
7813 if (err)
7814 goto err_register;
7815
ec74a471
ET		 7816 /* power down the optics for 82599 SFP+ fiber */
7817 if (hw->mac.ops.disable_tx_laser)
93d3ce8f
ET		 7818 hw->mac.ops.disable_tx_laser(hw);
7819
54386467
JB		 7820 /* carrier off reporting is important to ethtool even BEFORE open */
7821 netif_carrier_off(netdev);
7822
5dd2d332 7823#ifdef CONFIG_IXGBE_DCA
652f093f 7824 if (dca_add_requester(&pdev->dev) == 0) {
bd0362dd 7825 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
bd0362dd
JC		 7826 ixgbe_setup_dca(adapter);
7827 }
7828#endif
1cdd1ec8 7829 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
396e799c 7830 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
1cdd1ec8
GR		 7831 for (i = 0; i < adapter->num_vfs; i++)
7832 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7833 }
7834
2466dd9c
JK		 7835 /* firmware requires driver version to be 0xFFFFFFFF
7836 * since os does not support feature
7837 */
9612de92 7838 if (hw->mac.ops.set_fw_drv_ver)
2466dd9c
JK		 7839 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
7840 0xFF);
9612de92 7841
0365e6e4
PW		 7842 /* add san mac addr to netdev */
7843 ixgbe_add_sanmac_netdev(netdev);
9a799d71 7844
ea81875a 7845 e_dev_info("%s\n", ixgbe_default_device_descr);
9a799d71 7846 cards_found++;
3ca8bc6d 7847
1210982b 7848#ifdef CONFIG_IXGBE_HWMON
3ca8bc6d
DS		 7849 if (ixgbe_sysfs_init(adapter))
7850 e_err(probe, "failed to allocate sysfs resources\n");
1210982b 7851#endif /* CONFIG_IXGBE_HWMON */
3ca8bc6d 7852
00949167 7853 ixgbe_dbg_adapter_init(adapter);
00949167 7854
0b2679d6
DS		 7855 /* Need link setup for MNG FW, else wait for IXGBE_UP */
7856 if (hw->mng_fw_enabled && hw->mac.ops.setup_link)
7857 hw->mac.ops.setup_link(hw,
7858 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
7859 true);
7860
9a799d71
AK		 7861 return 0;
7862
7863err_register:
5eba3699 7864 ixgbe_release_hw_control(adapter);
7a921c93 7865 ixgbe_clear_interrupt_scheme(adapter);
9a799d71 7866err_sw_init:
99d74487 7867 ixgbe_disable_sriov(adapter);
7086400d 7868 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
9a799d71
AK		 7869 iounmap(hw->hw_addr);
7870err_ioremap:
7871 free_netdev(netdev);
7872err_alloc_etherdev:
e8e9f696
JP		 7873 pci_release_selected_regions(pdev,
7874 pci_select_bars(pdev, IORESOURCE_MEM));
9a799d71
AK		 7875err_pci_reg:
7876err_dma:
7877 pci_disable_device(pdev);
7878 return err;
7879}
7880
7881/**
7882 * ixgbe_remove - Device Removal Routine
7883 * @pdev: PCI device information struct
7884 *
7885 * ixgbe_remove is called by the PCI subsystem to alert the driver
7886 * that it should release a PCI device. The could be caused by a
7887 * Hot-Plug event, or because the driver is going to be removed from
7888 * memory.
7889 **/
9f9a12f8 7890static void ixgbe_remove(struct pci_dev *pdev)
9a799d71 7891{
c60fbb00
AD		 7892 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7893 struct net_device *netdev = adapter->netdev;
9a799d71 7894
00949167 7895 ixgbe_dbg_adapter_exit(adapter);
00949167 7896
9a799d71 7897 set_bit(__IXGBE_DOWN, &adapter->state);
7086400d 7898 cancel_work_sync(&adapter->service_task);
9a799d71 7899
3a6a4eda 7900
5dd2d332 7901#ifdef CONFIG_IXGBE_DCA
bd0362dd
JC		 7902 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7903 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7904 dca_remove_requester(&pdev->dev);
7905 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7906 }
7907
7908#endif
1210982b 7909#ifdef CONFIG_IXGBE_HWMON
3ca8bc6d 7910 ixgbe_sysfs_exit(adapter);
1210982b 7911#endif /* CONFIG_IXGBE_HWMON */
3ca8bc6d 7912
0365e6e4
PW		 7913 /* remove the added san mac */
7914 ixgbe_del_sanmac_netdev(netdev);
7915
c4900be0
DS		 7916 if (netdev->reg_state == NETREG_REGISTERED)
7917 unregister_netdev(netdev);
9a799d71 7918
da36b647
GR		 7919#ifdef CONFIG_PCI_IOV
7920 /*
7921 * Only disable SR-IOV on unload if the user specified the now
7922 * deprecated max_vfs module parameter.
7923 */
7924 if (max_vfs)
7925 ixgbe_disable_sriov(adapter);
7926#endif
7a921c93 7927 ixgbe_clear_interrupt_scheme(adapter);
5eba3699 7928
021230d4 7929 ixgbe_release_hw_control(adapter);
9a799d71 7930
2b1588c3
AD		 7931#ifdef CONFIG_DCB
7932 kfree(adapter->ixgbe_ieee_pfc);
7933 kfree(adapter->ixgbe_ieee_ets);
7934
7935#endif
9a799d71 7936 iounmap(adapter->hw.hw_addr);
9ce77666 7937 pci_release_selected_regions(pdev, pci_select_bars(pdev,
e8e9f696 7938 IORESOURCE_MEM));
9a799d71 7939
849c4542 7940 e_dev_info("complete\n");
021230d4 7941
9a799d71
AK		 7942 free_netdev(netdev);
7943
19d5afd4 7944 pci_disable_pcie_error_reporting(pdev);
6fabd715 7945
9a799d71
AK		 7946 pci_disable_device(pdev);
7947}
7948
7949/**
7950 * ixgbe_io_error_detected - called when PCI error is detected
7951 * @pdev: Pointer to PCI device
7952 * @state: The current pci connection state
7953 *
7954 * This function is called after a PCI bus error affecting
7955 * this device has been detected.
7956 */
7957static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
e8e9f696 7958 pci_channel_state_t state)
9a799d71 7959{
c60fbb00
AD		 7960 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7961 struct net_device *netdev = adapter->netdev;
9a799d71 7962
83c61fa9
GR		 7963#ifdef CONFIG_PCI_IOV
7964 struct pci_dev *bdev, *vfdev;
7965 u32 dw0, dw1, dw2, dw3;
7966 int vf, pos;
7967 u16 req_id, pf_func;
7968
7969 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7970 adapter->num_vfs == 0)
7971 goto skip_bad_vf_detection;
7972
7973 bdev = pdev->bus->self;
62f87c0e 7974 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
83c61fa9
GR		 7975 bdev = bdev->bus->self;
7976
7977 if (!bdev)
7978 goto skip_bad_vf_detection;
7979
7980 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
7981 if (!pos)
7982 goto skip_bad_vf_detection;
7983
7984 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
7985 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
7986 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
7987 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
7988
7989 req_id = dw1 >> 16;
7990 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
7991 if (!(req_id & 0x0080))
7992 goto skip_bad_vf_detection;
7993
7994 pf_func = req_id & 0x01;
7995 if ((pf_func & 1) == (pdev->devfn & 1)) {
7996 unsigned int device_id;
7997
7998 vf = (req_id & 0x7F) >> 1;
7999 e_dev_err("VF %d has caused a PCIe error\n", vf);
8000 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
8001 "%8.8x\tdw3: %8.8x\n",
8002 dw0, dw1, dw2, dw3);
8003 switch (adapter->hw.mac.type) {
8004 case ixgbe_mac_82599EB:
8005 device_id = IXGBE_82599_VF_DEVICE_ID;
8006 break;
8007 case ixgbe_mac_X540:
8008 device_id = IXGBE_X540_VF_DEVICE_ID;
8009 break;
8010 default:
8011 device_id = 0;
8012 break;
8013 }
8014
8015 /* Find the pci device of the offending VF */
36e90319 8016 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
83c61fa9
GR		 8017 while (vfdev) {
8018 if (vfdev->devfn == (req_id & 0xFF))
8019 break;
36e90319 8020 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
83c61fa9
GR		 8021 device_id, vfdev);
8022 }
8023 /*
8024 * There's a slim chance the VF could have been hot plugged,
8025 * so if it is no longer present we don't need to issue the
8026 * VFLR. Just clean up the AER in that case.
8027 */
8028 if (vfdev) {
8029 e_dev_err("Issuing VFLR to VF %d\n", vf);
8030 pci_write_config_dword(vfdev, 0xA8, 0x00008000);
b4fafbe9
GR		 8031 /* Free device reference count */
8032 pci_dev_put(vfdev);
83c61fa9
GR		 8033 }
8034
8035 pci_cleanup_aer_uncorrect_error_status(pdev);
8036 }
8037
8038 /*
8039 * Even though the error may have occurred on the other port
8040 * we still need to increment the vf error reference count for
8041 * both ports because the I/O resume function will be called
8042 * for both of them.
8043 */
8044 adapter->vferr_refcount++;
8045
8046 return PCI_ERS_RESULT_RECOVERED;
8047
8048skip_bad_vf_detection:
8049#endif /* CONFIG_PCI_IOV */
9a799d71
AK		 8050 netif_device_detach(netdev);
8051
3044b8d1
BL		 8052 if (state == pci_channel_io_perm_failure)
8053 return PCI_ERS_RESULT_DISCONNECT;
8054
9a799d71
AK		 8055 if (netif_running(netdev))
8056 ixgbe_down(adapter);
8057 pci_disable_device(pdev);
8058
b4617240 8059 /* Request a slot reset. */
9a799d71
AK		 8060 return PCI_ERS_RESULT_NEED_RESET;
8061}
8062
8063/**
8064 * ixgbe_io_slot_reset - called after the pci bus has been reset.
8065 * @pdev: Pointer to PCI device
8066 *
8067 * Restart the card from scratch, as if from a cold-boot.
8068 */
8069static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
8070{
c60fbb00 8071 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6fabd715
PWJ		 8072 pci_ers_result_t result;
8073 int err;
9a799d71 8074
9ce77666 8075 if (pci_enable_device_mem(pdev)) {
396e799c 8076 e_err(probe, "Cannot re-enable PCI device after reset.\n");
6fabd715
PWJ		 8077 result = PCI_ERS_RESULT_DISCONNECT;
8078 } else {
8079 pci_set_master(pdev);
8080 pci_restore_state(pdev);
c0e1f68b 8081 pci_save_state(pdev);
9a799d71 8082
dd4d8ca6 8083 pci_wake_from_d3(pdev, false);
9a799d71 8084
6fabd715 8085 ixgbe_reset(adapter);
88512539 8086 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6fabd715
PWJ		 8087 result = PCI_ERS_RESULT_RECOVERED;
8088 }
8089
8090 err = pci_cleanup_aer_uncorrect_error_status(pdev);
8091 if (err) {
849c4542
ET		 8092 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
8093 "failed 0x%0x\n", err);
6fabd715
PWJ		 8094 /* non-fatal, continue */
8095 }
9a799d71 8096
6fabd715 8097 return result;
9a799d71
AK		 8098}
8099
8100/**
8101 * ixgbe_io_resume - called when traffic can start flowing again.
8102 * @pdev: Pointer to PCI device
8103 *
8104 * This callback is called when the error recovery driver tells us that
8105 * its OK to resume normal operation.
8106 */
8107static void ixgbe_io_resume(struct pci_dev *pdev)
8108{
c60fbb00
AD		 8109 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8110 struct net_device *netdev = adapter->netdev;
9a799d71 8111
83c61fa9
GR		 8112#ifdef CONFIG_PCI_IOV
8113 if (adapter->vferr_refcount) {
8114 e_info(drv, "Resuming after VF err\n");
8115 adapter->vferr_refcount--;
8116 return;
8117 }
8118
8119#endif
c7ccde0f
AD		 8120 if (netif_running(netdev))
8121 ixgbe_up(adapter);
9a799d71
AK		 8122
8123 netif_device_attach(netdev);
9a799d71
AK		 8124}
8125
3646f0e5 8126static const struct pci_error_handlers ixgbe_err_handler = {
9a799d71
AK		 8127 .error_detected = ixgbe_io_error_detected,
8128 .slot_reset = ixgbe_io_slot_reset,
8129 .resume = ixgbe_io_resume,
8130};
8131
8132static struct pci_driver ixgbe_driver = {
8133 .name = ixgbe_driver_name,
8134 .id_table = ixgbe_pci_tbl,
8135 .probe = ixgbe_probe,
9f9a12f8 8136 .remove = ixgbe_remove,
9a799d71
AK		 8137#ifdef CONFIG_PM
8138 .suspend = ixgbe_suspend,
8139 .resume = ixgbe_resume,
8140#endif
8141 .shutdown = ixgbe_shutdown,
da36b647 8142 .sriov_configure = ixgbe_pci_sriov_configure,
9a799d71
AK		 8143 .err_handler = &ixgbe_err_handler
8144};
8145
8146/**
8147 * ixgbe_init_module - Driver Registration Routine
8148 *
8149 * ixgbe_init_module is the first routine called when the driver is
8150 * loaded. All it does is register with the PCI subsystem.
8151 **/
8152static int __init ixgbe_init_module(void)
8153{
8154 int ret;
c7689578 8155 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
849c4542 8156 pr_info("%s\n", ixgbe_copyright);
9a799d71 8157
00949167 8158 ixgbe_dbg_init();
00949167 8159
f01fc1a8
JK		 8160 ret = pci_register_driver(&ixgbe_driver);
8161 if (ret) {
f01fc1a8 8162 ixgbe_dbg_exit();
f01fc1a8
JK		 8163 return ret;
8164 }
8165
5dd2d332 8166#ifdef CONFIG_IXGBE_DCA
bd0362dd 8167 dca_register_notify(&dca_notifier);
bd0362dd 8168#endif
5dd2d332 8169
f01fc1a8 8170 return 0;
9a799d71 8171}
b4617240 8172
9a799d71
AK		 8173module_init(ixgbe_init_module);
8174
8175/**
8176 * ixgbe_exit_module - Driver Exit Cleanup Routine
8177 *
8178 * ixgbe_exit_module is called just before the driver is removed
8179 * from memory.
8180 **/
8181static void __exit ixgbe_exit_module(void)
8182{
5dd2d332 8183#ifdef CONFIG_IXGBE_DCA
bd0362dd
JC		 8184 dca_unregister_notify(&dca_notifier);
8185#endif
9a799d71 8186 pci_unregister_driver(&ixgbe_driver);
00949167 8187
00949167 8188 ixgbe_dbg_exit();
00949167 8189
1a51502b 8190 rcu_barrier(); /* Wait for completion of call_rcu()'s */
9a799d71 8191}
bd0362dd 8192
5dd2d332 8193#ifdef CONFIG_IXGBE_DCA
bd0362dd 8194static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
e8e9f696 8195 void *p)
bd0362dd
JC		 8196{
8197 int ret_val;
8198
8199 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
e8e9f696 8200 __ixgbe_notify_dca);
bd0362dd
JC		 8201
8202 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8203}
b453368d 8204
5dd2d332 8205#endif /* CONFIG_IXGBE_DCA */
849c4542 8206
9a799d71
AK		 8207module_exit(ixgbe_exit_module);
8208
8209/* ixgbe_main.c */
Linux kernel - Deliverables
This page took 2.299069 seconds and 5 git commands to generate.