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Merge tag 'omap-for-v3.13/yet-more-dt-regressions-take2' of git://git.kernel.org...
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2013 Intel Corporation.
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:
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>
35 #include <linux/interrupt.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/sctp.h>
39 #include <linux/pkt_sched.h>
40 #include <linux/ipv6.h>
41 #include <linux/slab.h>
42 #include <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if.h>
46 #include <linux/if_vlan.h>
47 #include <linux/if_macvlan.h>
48 #include <linux/if_bridge.h>
49 #include <linux/prefetch.h>
50 #include <scsi/fc/fc_fcoe.h>
51
52 #include "ixgbe.h"
53 #include "ixgbe_common.h"
54 #include "ixgbe_dcb_82599.h"
55 #include "ixgbe_sriov.h"
56
57 char ixgbe_driver_name[] = "ixgbe";
58 static const char ixgbe_driver_string[] =
59 "Intel(R) 10 Gigabit PCI Express Network Driver";
60 #ifdef IXGBE_FCOE
61 char ixgbe_default_device_descr[] =
62 "Intel(R) 10 Gigabit Network Connection";
63 #else
64 static char ixgbe_default_device_descr[] =
65 "Intel(R) 10 Gigabit Network Connection";
66 #endif
67 #define DRV_VERSION "3.15.1-k"
68 const char ixgbe_driver_version[] = DRV_VERSION;
69 static const char ixgbe_copyright[] =
70 "Copyright (c) 1999-2013 Intel Corporation.";
71
72 static const struct ixgbe_info *ixgbe_info_tbl[] = {
73 [board_82598] = &ixgbe_82598_info,
74 [board_82599] = &ixgbe_82599_info,
75 [board_X540] = &ixgbe_X540_info,
76 };
77
78 /* ixgbe_pci_tbl - PCI Device ID Table
79 *
80 * Wildcard entries (PCI_ANY_ID) should come last
81 * Last entry must be all 0s
82 *
83 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
84 * Class, Class Mask, private data (not used) }
85 */
86 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
117 /* required last entry */
118 {0, }
119 };
120 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
121
122 #ifdef CONFIG_IXGBE_DCA
123 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
124 void *p);
125 static struct notifier_block dca_notifier = {
126 .notifier_call = ixgbe_notify_dca,
127 .next = NULL,
128 .priority = 0
129 };
130 #endif
131
132 #ifdef CONFIG_PCI_IOV
133 static unsigned int max_vfs;
134 module_param(max_vfs, uint, 0);
135 MODULE_PARM_DESC(max_vfs,
136 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
137 #endif /* CONFIG_PCI_IOV */
138
139 static unsigned int allow_unsupported_sfp;
140 module_param(allow_unsupported_sfp, uint, 0);
141 MODULE_PARM_DESC(allow_unsupported_sfp,
142 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
143
144 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
145 static int debug = -1;
146 module_param(debug, int, 0);
147 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
148
149 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
150 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
151 MODULE_LICENSE("GPL");
152 MODULE_VERSION(DRV_VERSION);
153
154 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
155 u32 reg, u16 *value)
156 {
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 if (!pci_is_pcie(parent_dev))
169 return -1;
170
171 pcie_capability_read_word(parent_dev, reg, value);
172 return 0;
173 }
174
175 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
176 {
177 struct ixgbe_hw *hw = &adapter->hw;
178 u16 link_status = 0;
179 int err;
180
181 hw->bus.type = ixgbe_bus_type_pci_express;
182
183 /* Get the negotiated link width and speed from PCI config space of the
184 * parent, as this device is behind a switch
185 */
186 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
187
188 /* assume caller will handle error case */
189 if (err)
190 return err;
191
192 hw->bus.width = ixgbe_convert_bus_width(link_status);
193 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
194
195 return 0;
196 }
197
198 /**
199 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
200 * @hw: hw specific details
201 *
202 * This function is used by probe to determine whether a device's PCI-Express
203 * bandwidth details should be gathered from the parent bus instead of from the
204 * device. Used to ensure that various locations all have the correct device ID
205 * checks.
206 */
207 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
208 {
209 switch (hw->device_id) {
210 case IXGBE_DEV_ID_82599_SFP_SF_QP:
211 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
212 return true;
213 default:
214 return false;
215 }
216 }
217
218 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
219 int expected_gts)
220 {
221 int max_gts = 0;
222 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
223 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
224 struct pci_dev *pdev;
225
226 /* determine whether to use the the parent device
227 */
228 if (ixgbe_pcie_from_parent(&adapter->hw))
229 pdev = adapter->pdev->bus->parent->self;
230 else
231 pdev = adapter->pdev;
232
233 if (pcie_get_minimum_link(pdev, &speed, &width) ||
234 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
235 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
236 return;
237 }
238
239 switch (speed) {
240 case PCIE_SPEED_2_5GT:
241 /* 8b/10b encoding reduces max throughput by 20% */
242 max_gts = 2 * width;
243 break;
244 case PCIE_SPEED_5_0GT:
245 /* 8b/10b encoding reduces max throughput by 20% */
246 max_gts = 4 * width;
247 break;
248 case PCIE_SPEED_8_0GT:
249 /* 128b/130b encoding reduces throughput by less than 2% */
250 max_gts = 8 * width;
251 break;
252 default:
253 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
254 return;
255 }
256
257 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
258 max_gts);
259 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
260 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
261 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
262 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
263 "Unknown"),
264 width,
265 (speed == PCIE_SPEED_2_5GT ? "20%" :
266 speed == PCIE_SPEED_5_0GT ? "20%" :
267 speed == PCIE_SPEED_8_0GT ? "<2%" :
268 "Unknown"));
269
270 if (max_gts < expected_gts) {
271 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
272 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
273 expected_gts);
274 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
275 }
276 }
277
278 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
279 {
280 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
281 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
282 schedule_work(&adapter->service_task);
283 }
284
285 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
286 {
287 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
288
289 /* flush memory to make sure state is correct before next watchdog */
290 smp_mb__before_clear_bit();
291 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
292 }
293
294 struct ixgbe_reg_info {
295 u32 ofs;
296 char *name;
297 };
298
299 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
300
301 /* General Registers */
302 {IXGBE_CTRL, "CTRL"},
303 {IXGBE_STATUS, "STATUS"},
304 {IXGBE_CTRL_EXT, "CTRL_EXT"},
305
306 /* Interrupt Registers */
307 {IXGBE_EICR, "EICR"},
308
309 /* RX Registers */
310 {IXGBE_SRRCTL(0), "SRRCTL"},
311 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
312 {IXGBE_RDLEN(0), "RDLEN"},
313 {IXGBE_RDH(0), "RDH"},
314 {IXGBE_RDT(0), "RDT"},
315 {IXGBE_RXDCTL(0), "RXDCTL"},
316 {IXGBE_RDBAL(0), "RDBAL"},
317 {IXGBE_RDBAH(0), "RDBAH"},
318
319 /* TX Registers */
320 {IXGBE_TDBAL(0), "TDBAL"},
321 {IXGBE_TDBAH(0), "TDBAH"},
322 {IXGBE_TDLEN(0), "TDLEN"},
323 {IXGBE_TDH(0), "TDH"},
324 {IXGBE_TDT(0), "TDT"},
325 {IXGBE_TXDCTL(0), "TXDCTL"},
326
327 /* List Terminator */
328 {}
329 };
330
331
332 /*
333 * ixgbe_regdump - register printout routine
334 */
335 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
336 {
337 int i = 0, j = 0;
338 char rname[16];
339 u32 regs[64];
340
341 switch (reginfo->ofs) {
342 case IXGBE_SRRCTL(0):
343 for (i = 0; i < 64; i++)
344 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
345 break;
346 case IXGBE_DCA_RXCTRL(0):
347 for (i = 0; i < 64; i++)
348 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
349 break;
350 case IXGBE_RDLEN(0):
351 for (i = 0; i < 64; i++)
352 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
353 break;
354 case IXGBE_RDH(0):
355 for (i = 0; i < 64; i++)
356 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
357 break;
358 case IXGBE_RDT(0):
359 for (i = 0; i < 64; i++)
360 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
361 break;
362 case IXGBE_RXDCTL(0):
363 for (i = 0; i < 64; i++)
364 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
365 break;
366 case IXGBE_RDBAL(0):
367 for (i = 0; i < 64; i++)
368 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
369 break;
370 case IXGBE_RDBAH(0):
371 for (i = 0; i < 64; i++)
372 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
373 break;
374 case IXGBE_TDBAL(0):
375 for (i = 0; i < 64; i++)
376 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
377 break;
378 case IXGBE_TDBAH(0):
379 for (i = 0; i < 64; i++)
380 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
381 break;
382 case IXGBE_TDLEN(0):
383 for (i = 0; i < 64; i++)
384 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
385 break;
386 case IXGBE_TDH(0):
387 for (i = 0; i < 64; i++)
388 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
389 break;
390 case IXGBE_TDT(0):
391 for (i = 0; i < 64; i++)
392 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
393 break;
394 case IXGBE_TXDCTL(0):
395 for (i = 0; i < 64; i++)
396 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
397 break;
398 default:
399 pr_info("%-15s %08x\n", reginfo->name,
400 IXGBE_READ_REG(hw, reginfo->ofs));
401 return;
402 }
403
404 for (i = 0; i < 8; i++) {
405 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
406 pr_err("%-15s", rname);
407 for (j = 0; j < 8; j++)
408 pr_cont(" %08x", regs[i*8+j]);
409 pr_cont("\n");
410 }
411
412 }
413
414 /*
415 * ixgbe_dump - Print registers, tx-rings and rx-rings
416 */
417 static void ixgbe_dump(struct ixgbe_adapter *adapter)
418 {
419 struct net_device *netdev = adapter->netdev;
420 struct ixgbe_hw *hw = &adapter->hw;
421 struct ixgbe_reg_info *reginfo;
422 int n = 0;
423 struct ixgbe_ring *tx_ring;
424 struct ixgbe_tx_buffer *tx_buffer;
425 union ixgbe_adv_tx_desc *tx_desc;
426 struct my_u0 { u64 a; u64 b; } *u0;
427 struct ixgbe_ring *rx_ring;
428 union ixgbe_adv_rx_desc *rx_desc;
429 struct ixgbe_rx_buffer *rx_buffer_info;
430 u32 staterr;
431 int i = 0;
432
433 if (!netif_msg_hw(adapter))
434 return;
435
436 /* Print netdevice Info */
437 if (netdev) {
438 dev_info(&adapter->pdev->dev, "Net device Info\n");
439 pr_info("Device Name state "
440 "trans_start last_rx\n");
441 pr_info("%-15s %016lX %016lX %016lX\n",
442 netdev->name,
443 netdev->state,
444 netdev->trans_start,
445 netdev->last_rx);
446 }
447
448 /* Print Registers */
449 dev_info(&adapter->pdev->dev, "Register Dump\n");
450 pr_info(" Register Name Value\n");
451 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
452 reginfo->name; reginfo++) {
453 ixgbe_regdump(hw, reginfo);
454 }
455
456 /* Print TX Ring Summary */
457 if (!netdev || !netif_running(netdev))
458 goto exit;
459
460 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
461 pr_info(" %s %s %s %s\n",
462 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
463 "leng", "ntw", "timestamp");
464 for (n = 0; n < adapter->num_tx_queues; n++) {
465 tx_ring = adapter->tx_ring[n];
466 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
467 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
468 n, tx_ring->next_to_use, tx_ring->next_to_clean,
469 (u64)dma_unmap_addr(tx_buffer, dma),
470 dma_unmap_len(tx_buffer, len),
471 tx_buffer->next_to_watch,
472 (u64)tx_buffer->time_stamp);
473 }
474
475 /* Print TX Rings */
476 if (!netif_msg_tx_done(adapter))
477 goto rx_ring_summary;
478
479 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
480
481 /* Transmit Descriptor Formats
482 *
483 * 82598 Advanced Transmit Descriptor
484 * +--------------------------------------------------------------+
485 * 0 | Buffer Address [63:0] |
486 * +--------------------------------------------------------------+
487 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
488 * +--------------------------------------------------------------+
489 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
490 *
491 * 82598 Advanced Transmit Descriptor (Write-Back Format)
492 * +--------------------------------------------------------------+
493 * 0 | RSV [63:0] |
494 * +--------------------------------------------------------------+
495 * 8 | RSV | STA | NXTSEQ |
496 * +--------------------------------------------------------------+
497 * 63 36 35 32 31 0
498 *
499 * 82599+ Advanced Transmit Descriptor
500 * +--------------------------------------------------------------+
501 * 0 | Buffer Address [63:0] |
502 * +--------------------------------------------------------------+
503 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
504 * +--------------------------------------------------------------+
505 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
506 *
507 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
508 * +--------------------------------------------------------------+
509 * 0 | RSV [63:0] |
510 * +--------------------------------------------------------------+
511 * 8 | RSV | STA | RSV |
512 * +--------------------------------------------------------------+
513 * 63 36 35 32 31 0
514 */
515
516 for (n = 0; n < adapter->num_tx_queues; n++) {
517 tx_ring = adapter->tx_ring[n];
518 pr_info("------------------------------------\n");
519 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
520 pr_info("------------------------------------\n");
521 pr_info("%s%s %s %s %s %s\n",
522 "T [desc] [address 63:0 ] ",
523 "[PlPOIdStDDt Ln] [bi->dma ] ",
524 "leng", "ntw", "timestamp", "bi->skb");
525
526 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
527 tx_desc = IXGBE_TX_DESC(tx_ring, i);
528 tx_buffer = &tx_ring->tx_buffer_info[i];
529 u0 = (struct my_u0 *)tx_desc;
530 if (dma_unmap_len(tx_buffer, len) > 0) {
531 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
532 i,
533 le64_to_cpu(u0->a),
534 le64_to_cpu(u0->b),
535 (u64)dma_unmap_addr(tx_buffer, dma),
536 dma_unmap_len(tx_buffer, len),
537 tx_buffer->next_to_watch,
538 (u64)tx_buffer->time_stamp,
539 tx_buffer->skb);
540 if (i == tx_ring->next_to_use &&
541 i == tx_ring->next_to_clean)
542 pr_cont(" NTC/U\n");
543 else if (i == tx_ring->next_to_use)
544 pr_cont(" NTU\n");
545 else if (i == tx_ring->next_to_clean)
546 pr_cont(" NTC\n");
547 else
548 pr_cont("\n");
549
550 if (netif_msg_pktdata(adapter) &&
551 tx_buffer->skb)
552 print_hex_dump(KERN_INFO, "",
553 DUMP_PREFIX_ADDRESS, 16, 1,
554 tx_buffer->skb->data,
555 dma_unmap_len(tx_buffer, len),
556 true);
557 }
558 }
559 }
560
561 /* Print RX Rings Summary */
562 rx_ring_summary:
563 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
564 pr_info("Queue [NTU] [NTC]\n");
565 for (n = 0; n < adapter->num_rx_queues; n++) {
566 rx_ring = adapter->rx_ring[n];
567 pr_info("%5d %5X %5X\n",
568 n, rx_ring->next_to_use, rx_ring->next_to_clean);
569 }
570
571 /* Print RX Rings */
572 if (!netif_msg_rx_status(adapter))
573 goto exit;
574
575 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
576
577 /* Receive Descriptor Formats
578 *
579 * 82598 Advanced Receive Descriptor (Read) Format
580 * 63 1 0
581 * +-----------------------------------------------------+
582 * 0 | Packet Buffer Address [63:1] |A0/NSE|
583 * +----------------------------------------------+------+
584 * 8 | Header Buffer Address [63:1] | DD |
585 * +-----------------------------------------------------+
586 *
587 *
588 * 82598 Advanced Receive Descriptor (Write-Back) Format
589 *
590 * 63 48 47 32 31 30 21 20 16 15 4 3 0
591 * +------------------------------------------------------+
592 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
593 * | Packet | IP | | | | Type | Type |
594 * | Checksum | Ident | | | | | |
595 * +------------------------------------------------------+
596 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
597 * +------------------------------------------------------+
598 * 63 48 47 32 31 20 19 0
599 *
600 * 82599+ Advanced Receive Descriptor (Read) Format
601 * 63 1 0
602 * +-----------------------------------------------------+
603 * 0 | Packet Buffer Address [63:1] |A0/NSE|
604 * +----------------------------------------------+------+
605 * 8 | Header Buffer Address [63:1] | DD |
606 * +-----------------------------------------------------+
607 *
608 *
609 * 82599+ Advanced Receive Descriptor (Write-Back) Format
610 *
611 * 63 48 47 32 31 30 21 20 17 16 4 3 0
612 * +------------------------------------------------------+
613 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
614 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
615 * |/ Flow Dir Flt ID | | | | | |
616 * +------------------------------------------------------+
617 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
618 * +------------------------------------------------------+
619 * 63 48 47 32 31 20 19 0
620 */
621
622 for (n = 0; n < adapter->num_rx_queues; n++) {
623 rx_ring = adapter->rx_ring[n];
624 pr_info("------------------------------------\n");
625 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
626 pr_info("------------------------------------\n");
627 pr_info("%s%s%s",
628 "R [desc] [ PktBuf A0] ",
629 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
630 "<-- Adv Rx Read format\n");
631 pr_info("%s%s%s",
632 "RWB[desc] [PcsmIpSHl PtRs] ",
633 "[vl er S cks ln] ---------------- [bi->skb ] ",
634 "<-- Adv Rx Write-Back format\n");
635
636 for (i = 0; i < rx_ring->count; i++) {
637 rx_buffer_info = &rx_ring->rx_buffer_info[i];
638 rx_desc = IXGBE_RX_DESC(rx_ring, i);
639 u0 = (struct my_u0 *)rx_desc;
640 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
641 if (staterr & IXGBE_RXD_STAT_DD) {
642 /* Descriptor Done */
643 pr_info("RWB[0x%03X] %016llX "
644 "%016llX ---------------- %p", i,
645 le64_to_cpu(u0->a),
646 le64_to_cpu(u0->b),
647 rx_buffer_info->skb);
648 } else {
649 pr_info("R [0x%03X] %016llX "
650 "%016llX %016llX %p", i,
651 le64_to_cpu(u0->a),
652 le64_to_cpu(u0->b),
653 (u64)rx_buffer_info->dma,
654 rx_buffer_info->skb);
655
656 if (netif_msg_pktdata(adapter) &&
657 rx_buffer_info->dma) {
658 print_hex_dump(KERN_INFO, "",
659 DUMP_PREFIX_ADDRESS, 16, 1,
660 page_address(rx_buffer_info->page) +
661 rx_buffer_info->page_offset,
662 ixgbe_rx_bufsz(rx_ring), true);
663 }
664 }
665
666 if (i == rx_ring->next_to_use)
667 pr_cont(" NTU\n");
668 else if (i == rx_ring->next_to_clean)
669 pr_cont(" NTC\n");
670 else
671 pr_cont("\n");
672
673 }
674 }
675
676 exit:
677 return;
678 }
679
680 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
681 {
682 u32 ctrl_ext;
683
684 /* Let firmware take over control of h/w */
685 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
686 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
687 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
688 }
689
690 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
691 {
692 u32 ctrl_ext;
693
694 /* Let firmware know the driver has taken over */
695 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
696 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
697 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
698 }
699
700 /**
701 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
702 * @adapter: pointer to adapter struct
703 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
704 * @queue: queue to map the corresponding interrupt to
705 * @msix_vector: the vector to map to the corresponding queue
706 *
707 */
708 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
709 u8 queue, u8 msix_vector)
710 {
711 u32 ivar, index;
712 struct ixgbe_hw *hw = &adapter->hw;
713 switch (hw->mac.type) {
714 case ixgbe_mac_82598EB:
715 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
716 if (direction == -1)
717 direction = 0;
718 index = (((direction * 64) + queue) >> 2) & 0x1F;
719 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
720 ivar &= ~(0xFF << (8 * (queue & 0x3)));
721 ivar |= (msix_vector << (8 * (queue & 0x3)));
722 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
723 break;
724 case ixgbe_mac_82599EB:
725 case ixgbe_mac_X540:
726 if (direction == -1) {
727 /* other causes */
728 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
729 index = ((queue & 1) * 8);
730 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
731 ivar &= ~(0xFF << index);
732 ivar |= (msix_vector << index);
733 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
734 break;
735 } else {
736 /* tx or rx causes */
737 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
738 index = ((16 * (queue & 1)) + (8 * direction));
739 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
740 ivar &= ~(0xFF << index);
741 ivar |= (msix_vector << index);
742 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
743 break;
744 }
745 default:
746 break;
747 }
748 }
749
750 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
751 u64 qmask)
752 {
753 u32 mask;
754
755 switch (adapter->hw.mac.type) {
756 case ixgbe_mac_82598EB:
757 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
758 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
759 break;
760 case ixgbe_mac_82599EB:
761 case ixgbe_mac_X540:
762 mask = (qmask & 0xFFFFFFFF);
763 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
764 mask = (qmask >> 32);
765 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
766 break;
767 default:
768 break;
769 }
770 }
771
772 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
773 struct ixgbe_tx_buffer *tx_buffer)
774 {
775 if (tx_buffer->skb) {
776 dev_kfree_skb_any(tx_buffer->skb);
777 if (dma_unmap_len(tx_buffer, len))
778 dma_unmap_single(ring->dev,
779 dma_unmap_addr(tx_buffer, dma),
780 dma_unmap_len(tx_buffer, len),
781 DMA_TO_DEVICE);
782 } else if (dma_unmap_len(tx_buffer, len)) {
783 dma_unmap_page(ring->dev,
784 dma_unmap_addr(tx_buffer, dma),
785 dma_unmap_len(tx_buffer, len),
786 DMA_TO_DEVICE);
787 }
788 tx_buffer->next_to_watch = NULL;
789 tx_buffer->skb = NULL;
790 dma_unmap_len_set(tx_buffer, len, 0);
791 /* tx_buffer must be completely set up in the transmit path */
792 }
793
794 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
795 {
796 struct ixgbe_hw *hw = &adapter->hw;
797 struct ixgbe_hw_stats *hwstats = &adapter->stats;
798 int i;
799 u32 data;
800
801 if ((hw->fc.current_mode != ixgbe_fc_full) &&
802 (hw->fc.current_mode != ixgbe_fc_rx_pause))
803 return;
804
805 switch (hw->mac.type) {
806 case ixgbe_mac_82598EB:
807 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
808 break;
809 default:
810 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
811 }
812 hwstats->lxoffrxc += data;
813
814 /* refill credits (no tx hang) if we received xoff */
815 if (!data)
816 return;
817
818 for (i = 0; i < adapter->num_tx_queues; i++)
819 clear_bit(__IXGBE_HANG_CHECK_ARMED,
820 &adapter->tx_ring[i]->state);
821 }
822
823 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
824 {
825 struct ixgbe_hw *hw = &adapter->hw;
826 struct ixgbe_hw_stats *hwstats = &adapter->stats;
827 u32 xoff[8] = {0};
828 u8 tc;
829 int i;
830 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
831
832 if (adapter->ixgbe_ieee_pfc)
833 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
834
835 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
836 ixgbe_update_xoff_rx_lfc(adapter);
837 return;
838 }
839
840 /* update stats for each tc, only valid with PFC enabled */
841 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
842 u32 pxoffrxc;
843
844 switch (hw->mac.type) {
845 case ixgbe_mac_82598EB:
846 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
847 break;
848 default:
849 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
850 }
851 hwstats->pxoffrxc[i] += pxoffrxc;
852 /* Get the TC for given UP */
853 tc = netdev_get_prio_tc_map(adapter->netdev, i);
854 xoff[tc] += pxoffrxc;
855 }
856
857 /* disarm tx queues that have received xoff frames */
858 for (i = 0; i < adapter->num_tx_queues; i++) {
859 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
860
861 tc = tx_ring->dcb_tc;
862 if (xoff[tc])
863 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
864 }
865 }
866
867 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
868 {
869 return ring->stats.packets;
870 }
871
872 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
873 {
874 struct ixgbe_adapter *adapter;
875 struct ixgbe_hw *hw;
876 u32 head, tail;
877
878 if (ring->l2_accel_priv)
879 adapter = ring->l2_accel_priv->real_adapter;
880 else
881 adapter = netdev_priv(ring->netdev);
882
883 hw = &adapter->hw;
884 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
885 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
886
887 if (head != tail)
888 return (head < tail) ?
889 tail - head : (tail + ring->count - head);
890
891 return 0;
892 }
893
894 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
895 {
896 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
897 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
898 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
899 bool ret = false;
900
901 clear_check_for_tx_hang(tx_ring);
902
903 /*
904 * Check for a hung queue, but be thorough. This verifies
905 * that a transmit has been completed since the previous
906 * check AND there is at least one packet pending. The
907 * ARMED bit is set to indicate a potential hang. The
908 * bit is cleared if a pause frame is received to remove
909 * false hang detection due to PFC or 802.3x frames. By
910 * requiring this to fail twice we avoid races with
911 * pfc clearing the ARMED bit and conditions where we
912 * run the check_tx_hang logic with a transmit completion
913 * pending but without time to complete it yet.
914 */
915 if ((tx_done_old == tx_done) && tx_pending) {
916 /* make sure it is true for two checks in a row */
917 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
918 &tx_ring->state);
919 } else {
920 /* update completed stats and continue */
921 tx_ring->tx_stats.tx_done_old = tx_done;
922 /* reset the countdown */
923 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
924 }
925
926 return ret;
927 }
928
929 /**
930 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
931 * @adapter: driver private struct
932 **/
933 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
934 {
935
936 /* Do the reset outside of interrupt context */
937 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
938 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
939 e_warn(drv, "initiating reset due to tx timeout\n");
940 ixgbe_service_event_schedule(adapter);
941 }
942 }
943
944 /**
945 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
946 * @q_vector: structure containing interrupt and ring information
947 * @tx_ring: tx ring to clean
948 **/
949 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
950 struct ixgbe_ring *tx_ring)
951 {
952 struct ixgbe_adapter *adapter = q_vector->adapter;
953 struct ixgbe_tx_buffer *tx_buffer;
954 union ixgbe_adv_tx_desc *tx_desc;
955 unsigned int total_bytes = 0, total_packets = 0;
956 unsigned int budget = q_vector->tx.work_limit;
957 unsigned int i = tx_ring->next_to_clean;
958
959 if (test_bit(__IXGBE_DOWN, &adapter->state))
960 return true;
961
962 tx_buffer = &tx_ring->tx_buffer_info[i];
963 tx_desc = IXGBE_TX_DESC(tx_ring, i);
964 i -= tx_ring->count;
965
966 do {
967 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
968
969 /* if next_to_watch is not set then there is no work pending */
970 if (!eop_desc)
971 break;
972
973 /* prevent any other reads prior to eop_desc */
974 read_barrier_depends();
975
976 /* if DD is not set pending work has not been completed */
977 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
978 break;
979
980 /* clear next_to_watch to prevent false hangs */
981 tx_buffer->next_to_watch = NULL;
982
983 /* update the statistics for this packet */
984 total_bytes += tx_buffer->bytecount;
985 total_packets += tx_buffer->gso_segs;
986
987 /* free the skb */
988 dev_kfree_skb_any(tx_buffer->skb);
989
990 /* unmap skb header data */
991 dma_unmap_single(tx_ring->dev,
992 dma_unmap_addr(tx_buffer, dma),
993 dma_unmap_len(tx_buffer, len),
994 DMA_TO_DEVICE);
995
996 /* clear tx_buffer data */
997 tx_buffer->skb = NULL;
998 dma_unmap_len_set(tx_buffer, len, 0);
999
1000 /* unmap remaining buffers */
1001 while (tx_desc != eop_desc) {
1002 tx_buffer++;
1003 tx_desc++;
1004 i++;
1005 if (unlikely(!i)) {
1006 i -= tx_ring->count;
1007 tx_buffer = tx_ring->tx_buffer_info;
1008 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1009 }
1010
1011 /* unmap any remaining paged data */
1012 if (dma_unmap_len(tx_buffer, len)) {
1013 dma_unmap_page(tx_ring->dev,
1014 dma_unmap_addr(tx_buffer, dma),
1015 dma_unmap_len(tx_buffer, len),
1016 DMA_TO_DEVICE);
1017 dma_unmap_len_set(tx_buffer, len, 0);
1018 }
1019 }
1020
1021 /* move us one more past the eop_desc for start of next pkt */
1022 tx_buffer++;
1023 tx_desc++;
1024 i++;
1025 if (unlikely(!i)) {
1026 i -= tx_ring->count;
1027 tx_buffer = tx_ring->tx_buffer_info;
1028 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1029 }
1030
1031 /* issue prefetch for next Tx descriptor */
1032 prefetch(tx_desc);
1033
1034 /* update budget accounting */
1035 budget--;
1036 } while (likely(budget));
1037
1038 i += tx_ring->count;
1039 tx_ring->next_to_clean = i;
1040 u64_stats_update_begin(&tx_ring->syncp);
1041 tx_ring->stats.bytes += total_bytes;
1042 tx_ring->stats.packets += total_packets;
1043 u64_stats_update_end(&tx_ring->syncp);
1044 q_vector->tx.total_bytes += total_bytes;
1045 q_vector->tx.total_packets += total_packets;
1046
1047 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1048 /* schedule immediate reset if we believe we hung */
1049 struct ixgbe_hw *hw = &adapter->hw;
1050 e_err(drv, "Detected Tx Unit Hang\n"
1051 " Tx Queue <%d>\n"
1052 " TDH, TDT <%x>, <%x>\n"
1053 " next_to_use <%x>\n"
1054 " next_to_clean <%x>\n"
1055 "tx_buffer_info[next_to_clean]\n"
1056 " time_stamp <%lx>\n"
1057 " jiffies <%lx>\n",
1058 tx_ring->queue_index,
1059 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1060 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1061 tx_ring->next_to_use, i,
1062 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1063
1064 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1065
1066 e_info(probe,
1067 "tx hang %d detected on queue %d, resetting adapter\n",
1068 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1069
1070 /* schedule immediate reset if we believe we hung */
1071 ixgbe_tx_timeout_reset(adapter);
1072
1073 /* the adapter is about to reset, no point in enabling stuff */
1074 return true;
1075 }
1076
1077 netdev_tx_completed_queue(txring_txq(tx_ring),
1078 total_packets, total_bytes);
1079
1080 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1081 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1082 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1083 /* Make sure that anybody stopping the queue after this
1084 * sees the new next_to_clean.
1085 */
1086 smp_mb();
1087 if (__netif_subqueue_stopped(tx_ring->netdev,
1088 tx_ring->queue_index)
1089 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1090 netif_wake_subqueue(tx_ring->netdev,
1091 tx_ring->queue_index);
1092 ++tx_ring->tx_stats.restart_queue;
1093 }
1094 }
1095
1096 return !!budget;
1097 }
1098
1099 #ifdef CONFIG_IXGBE_DCA
1100 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1101 struct ixgbe_ring *tx_ring,
1102 int cpu)
1103 {
1104 struct ixgbe_hw *hw = &adapter->hw;
1105 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1106 u16 reg_offset;
1107
1108 switch (hw->mac.type) {
1109 case ixgbe_mac_82598EB:
1110 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1111 break;
1112 case ixgbe_mac_82599EB:
1113 case ixgbe_mac_X540:
1114 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1115 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1116 break;
1117 default:
1118 /* for unknown hardware do not write register */
1119 return;
1120 }
1121
1122 /*
1123 * We can enable relaxed ordering for reads, but not writes when
1124 * DCA is enabled. This is due to a known issue in some chipsets
1125 * which will cause the DCA tag to be cleared.
1126 */
1127 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1128 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1129 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1130
1131 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1132 }
1133
1134 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1135 struct ixgbe_ring *rx_ring,
1136 int cpu)
1137 {
1138 struct ixgbe_hw *hw = &adapter->hw;
1139 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1140 u8 reg_idx = rx_ring->reg_idx;
1141
1142
1143 switch (hw->mac.type) {
1144 case ixgbe_mac_82599EB:
1145 case ixgbe_mac_X540:
1146 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1147 break;
1148 default:
1149 break;
1150 }
1151
1152 /*
1153 * We can enable relaxed ordering for reads, but not writes when
1154 * DCA is enabled. This is due to a known issue in some chipsets
1155 * which will cause the DCA tag to be cleared.
1156 */
1157 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1158 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1159
1160 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1161 }
1162
1163 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1164 {
1165 struct ixgbe_adapter *adapter = q_vector->adapter;
1166 struct ixgbe_ring *ring;
1167 int cpu = get_cpu();
1168
1169 if (q_vector->cpu == cpu)
1170 goto out_no_update;
1171
1172 ixgbe_for_each_ring(ring, q_vector->tx)
1173 ixgbe_update_tx_dca(adapter, ring, cpu);
1174
1175 ixgbe_for_each_ring(ring, q_vector->rx)
1176 ixgbe_update_rx_dca(adapter, ring, cpu);
1177
1178 q_vector->cpu = cpu;
1179 out_no_update:
1180 put_cpu();
1181 }
1182
1183 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1184 {
1185 int i;
1186
1187 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1188 return;
1189
1190 /* always use CB2 mode, difference is masked in the CB driver */
1191 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1192
1193 for (i = 0; i < adapter->num_q_vectors; i++) {
1194 adapter->q_vector[i]->cpu = -1;
1195 ixgbe_update_dca(adapter->q_vector[i]);
1196 }
1197 }
1198
1199 static int __ixgbe_notify_dca(struct device *dev, void *data)
1200 {
1201 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1202 unsigned long event = *(unsigned long *)data;
1203
1204 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1205 return 0;
1206
1207 switch (event) {
1208 case DCA_PROVIDER_ADD:
1209 /* if we're already enabled, don't do it again */
1210 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1211 break;
1212 if (dca_add_requester(dev) == 0) {
1213 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1214 ixgbe_setup_dca(adapter);
1215 break;
1216 }
1217 /* Fall Through since DCA is disabled. */
1218 case DCA_PROVIDER_REMOVE:
1219 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1220 dca_remove_requester(dev);
1221 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1222 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1223 }
1224 break;
1225 }
1226
1227 return 0;
1228 }
1229
1230 #endif /* CONFIG_IXGBE_DCA */
1231 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1232 union ixgbe_adv_rx_desc *rx_desc,
1233 struct sk_buff *skb)
1234 {
1235 if (ring->netdev->features & NETIF_F_RXHASH)
1236 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
1237 }
1238
1239 #ifdef IXGBE_FCOE
1240 /**
1241 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1242 * @ring: structure containing ring specific data
1243 * @rx_desc: advanced rx descriptor
1244 *
1245 * Returns : true if it is FCoE pkt
1246 */
1247 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1248 union ixgbe_adv_rx_desc *rx_desc)
1249 {
1250 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1251
1252 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1253 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1254 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1255 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1256 }
1257
1258 #endif /* IXGBE_FCOE */
1259 /**
1260 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1261 * @ring: structure containing ring specific data
1262 * @rx_desc: current Rx descriptor being processed
1263 * @skb: skb currently being received and modified
1264 **/
1265 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1266 union ixgbe_adv_rx_desc *rx_desc,
1267 struct sk_buff *skb)
1268 {
1269 skb_checksum_none_assert(skb);
1270
1271 /* Rx csum disabled */
1272 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1273 return;
1274
1275 /* if IP and error */
1276 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1277 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1278 ring->rx_stats.csum_err++;
1279 return;
1280 }
1281
1282 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1283 return;
1284
1285 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1286 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1287
1288 /*
1289 * 82599 errata, UDP frames with a 0 checksum can be marked as
1290 * checksum errors.
1291 */
1292 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1293 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1294 return;
1295
1296 ring->rx_stats.csum_err++;
1297 return;
1298 }
1299
1300 /* It must be a TCP or UDP packet with a valid checksum */
1301 skb->ip_summed = CHECKSUM_UNNECESSARY;
1302 }
1303
1304 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1305 {
1306 rx_ring->next_to_use = val;
1307
1308 /* update next to alloc since we have filled the ring */
1309 rx_ring->next_to_alloc = val;
1310 /*
1311 * Force memory writes to complete before letting h/w
1312 * know there are new descriptors to fetch. (Only
1313 * applicable for weak-ordered memory model archs,
1314 * such as IA-64).
1315 */
1316 wmb();
1317 writel(val, rx_ring->tail);
1318 }
1319
1320 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1321 struct ixgbe_rx_buffer *bi)
1322 {
1323 struct page *page = bi->page;
1324 dma_addr_t dma = bi->dma;
1325
1326 /* since we are recycling buffers we should seldom need to alloc */
1327 if (likely(dma))
1328 return true;
1329
1330 /* alloc new page for storage */
1331 if (likely(!page)) {
1332 page = __skb_alloc_pages(GFP_ATOMIC | __GFP_COLD | __GFP_COMP,
1333 bi->skb, ixgbe_rx_pg_order(rx_ring));
1334 if (unlikely(!page)) {
1335 rx_ring->rx_stats.alloc_rx_page_failed++;
1336 return false;
1337 }
1338 bi->page = page;
1339 }
1340
1341 /* map page for use */
1342 dma = dma_map_page(rx_ring->dev, page, 0,
1343 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1344
1345 /*
1346 * if mapping failed free memory back to system since
1347 * there isn't much point in holding memory we can't use
1348 */
1349 if (dma_mapping_error(rx_ring->dev, dma)) {
1350 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1351 bi->page = NULL;
1352
1353 rx_ring->rx_stats.alloc_rx_page_failed++;
1354 return false;
1355 }
1356
1357 bi->dma = dma;
1358 bi->page_offset = 0;
1359
1360 return true;
1361 }
1362
1363 /**
1364 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1365 * @rx_ring: ring to place buffers on
1366 * @cleaned_count: number of buffers to replace
1367 **/
1368 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1369 {
1370 union ixgbe_adv_rx_desc *rx_desc;
1371 struct ixgbe_rx_buffer *bi;
1372 u16 i = rx_ring->next_to_use;
1373
1374 /* nothing to do */
1375 if (!cleaned_count)
1376 return;
1377
1378 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1379 bi = &rx_ring->rx_buffer_info[i];
1380 i -= rx_ring->count;
1381
1382 do {
1383 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1384 break;
1385
1386 /*
1387 * Refresh the desc even if buffer_addrs didn't change
1388 * because each write-back erases this info.
1389 */
1390 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1391
1392 rx_desc++;
1393 bi++;
1394 i++;
1395 if (unlikely(!i)) {
1396 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1397 bi = rx_ring->rx_buffer_info;
1398 i -= rx_ring->count;
1399 }
1400
1401 /* clear the hdr_addr for the next_to_use descriptor */
1402 rx_desc->read.hdr_addr = 0;
1403
1404 cleaned_count--;
1405 } while (cleaned_count);
1406
1407 i += rx_ring->count;
1408
1409 if (rx_ring->next_to_use != i)
1410 ixgbe_release_rx_desc(rx_ring, i);
1411 }
1412
1413 /**
1414 * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
1415 * @data: pointer to the start of the headers
1416 * @max_len: total length of section to find headers in
1417 *
1418 * This function is meant to determine the length of headers that will
1419 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
1420 * motivation of doing this is to only perform one pull for IPv4 TCP
1421 * packets so that we can do basic things like calculating the gso_size
1422 * based on the average data per packet.
1423 **/
1424 static unsigned int ixgbe_get_headlen(unsigned char *data,
1425 unsigned int max_len)
1426 {
1427 union {
1428 unsigned char *network;
1429 /* l2 headers */
1430 struct ethhdr *eth;
1431 struct vlan_hdr *vlan;
1432 /* l3 headers */
1433 struct iphdr *ipv4;
1434 struct ipv6hdr *ipv6;
1435 } hdr;
1436 __be16 protocol;
1437 u8 nexthdr = 0; /* default to not TCP */
1438 u8 hlen;
1439
1440 /* this should never happen, but better safe than sorry */
1441 if (max_len < ETH_HLEN)
1442 return max_len;
1443
1444 /* initialize network frame pointer */
1445 hdr.network = data;
1446
1447 /* set first protocol and move network header forward */
1448 protocol = hdr.eth->h_proto;
1449 hdr.network += ETH_HLEN;
1450
1451 /* handle any vlan tag if present */
1452 if (protocol == __constant_htons(ETH_P_8021Q)) {
1453 if ((hdr.network - data) > (max_len - VLAN_HLEN))
1454 return max_len;
1455
1456 protocol = hdr.vlan->h_vlan_encapsulated_proto;
1457 hdr.network += VLAN_HLEN;
1458 }
1459
1460 /* handle L3 protocols */
1461 if (protocol == __constant_htons(ETH_P_IP)) {
1462 if ((hdr.network - data) > (max_len - sizeof(struct iphdr)))
1463 return max_len;
1464
1465 /* access ihl as a u8 to avoid unaligned access on ia64 */
1466 hlen = (hdr.network[0] & 0x0F) << 2;
1467
1468 /* verify hlen meets minimum size requirements */
1469 if (hlen < sizeof(struct iphdr))
1470 return hdr.network - data;
1471
1472 /* record next protocol if header is present */
1473 if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
1474 nexthdr = hdr.ipv4->protocol;
1475 } else if (protocol == __constant_htons(ETH_P_IPV6)) {
1476 if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))
1477 return max_len;
1478
1479 /* record next protocol */
1480 nexthdr = hdr.ipv6->nexthdr;
1481 hlen = sizeof(struct ipv6hdr);
1482 #ifdef IXGBE_FCOE
1483 } else if (protocol == __constant_htons(ETH_P_FCOE)) {
1484 if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN))
1485 return max_len;
1486 hlen = FCOE_HEADER_LEN;
1487 #endif
1488 } else {
1489 return hdr.network - data;
1490 }
1491
1492 /* relocate pointer to start of L4 header */
1493 hdr.network += hlen;
1494
1495 /* finally sort out TCP/UDP */
1496 if (nexthdr == IPPROTO_TCP) {
1497 if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
1498 return max_len;
1499
1500 /* access doff as a u8 to avoid unaligned access on ia64 */
1501 hlen = (hdr.network[12] & 0xF0) >> 2;
1502
1503 /* verify hlen meets minimum size requirements */
1504 if (hlen < sizeof(struct tcphdr))
1505 return hdr.network - data;
1506
1507 hdr.network += hlen;
1508 } else if (nexthdr == IPPROTO_UDP) {
1509 if ((hdr.network - data) > (max_len - sizeof(struct udphdr)))
1510 return max_len;
1511
1512 hdr.network += sizeof(struct udphdr);
1513 }
1514
1515 /*
1516 * If everything has gone correctly hdr.network should be the
1517 * data section of the packet and will be the end of the header.
1518 * If not then it probably represents the end of the last recognized
1519 * header.
1520 */
1521 if ((hdr.network - data) < max_len)
1522 return hdr.network - data;
1523 else
1524 return max_len;
1525 }
1526
1527 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1528 struct sk_buff *skb)
1529 {
1530 u16 hdr_len = skb_headlen(skb);
1531
1532 /* set gso_size to avoid messing up TCP MSS */
1533 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1534 IXGBE_CB(skb)->append_cnt);
1535 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1536 }
1537
1538 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1539 struct sk_buff *skb)
1540 {
1541 /* if append_cnt is 0 then frame is not RSC */
1542 if (!IXGBE_CB(skb)->append_cnt)
1543 return;
1544
1545 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1546 rx_ring->rx_stats.rsc_flush++;
1547
1548 ixgbe_set_rsc_gso_size(rx_ring, skb);
1549
1550 /* gso_size is computed using append_cnt so always clear it last */
1551 IXGBE_CB(skb)->append_cnt = 0;
1552 }
1553
1554 /**
1555 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1556 * @rx_ring: rx descriptor ring packet is being transacted on
1557 * @rx_desc: pointer to the EOP Rx descriptor
1558 * @skb: pointer to current skb being populated
1559 *
1560 * This function checks the ring, descriptor, and packet information in
1561 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1562 * other fields within the skb.
1563 **/
1564 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1565 union ixgbe_adv_rx_desc *rx_desc,
1566 struct sk_buff *skb)
1567 {
1568 struct net_device *dev = rx_ring->netdev;
1569
1570 ixgbe_update_rsc_stats(rx_ring, skb);
1571
1572 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1573
1574 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1575
1576 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1577
1578 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1579 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1580 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1581 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1582 }
1583
1584 skb_record_rx_queue(skb, rx_ring->queue_index);
1585
1586 skb->protocol = eth_type_trans(skb, dev);
1587 }
1588
1589 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1590 struct sk_buff *skb)
1591 {
1592 struct ixgbe_adapter *adapter = q_vector->adapter;
1593
1594 if (ixgbe_qv_busy_polling(q_vector))
1595 netif_receive_skb(skb);
1596 else if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1597 napi_gro_receive(&q_vector->napi, skb);
1598 else
1599 netif_rx(skb);
1600 }
1601
1602 /**
1603 * ixgbe_is_non_eop - process handling of non-EOP buffers
1604 * @rx_ring: Rx ring being processed
1605 * @rx_desc: Rx descriptor for current buffer
1606 * @skb: Current socket buffer containing buffer in progress
1607 *
1608 * This function updates next to clean. If the buffer is an EOP buffer
1609 * this function exits returning false, otherwise it will place the
1610 * sk_buff in the next buffer to be chained and return true indicating
1611 * that this is in fact a non-EOP buffer.
1612 **/
1613 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1614 union ixgbe_adv_rx_desc *rx_desc,
1615 struct sk_buff *skb)
1616 {
1617 u32 ntc = rx_ring->next_to_clean + 1;
1618
1619 /* fetch, update, and store next to clean */
1620 ntc = (ntc < rx_ring->count) ? ntc : 0;
1621 rx_ring->next_to_clean = ntc;
1622
1623 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1624
1625 /* update RSC append count if present */
1626 if (ring_is_rsc_enabled(rx_ring)) {
1627 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1628 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1629
1630 if (unlikely(rsc_enabled)) {
1631 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1632
1633 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1634 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1635
1636 /* update ntc based on RSC value */
1637 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1638 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1639 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1640 }
1641 }
1642
1643 /* if we are the last buffer then there is nothing else to do */
1644 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1645 return false;
1646
1647 /* place skb in next buffer to be received */
1648 rx_ring->rx_buffer_info[ntc].skb = skb;
1649 rx_ring->rx_stats.non_eop_descs++;
1650
1651 return true;
1652 }
1653
1654 /**
1655 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1656 * @rx_ring: rx descriptor ring packet is being transacted on
1657 * @skb: pointer to current skb being adjusted
1658 *
1659 * This function is an ixgbe specific version of __pskb_pull_tail. The
1660 * main difference between this version and the original function is that
1661 * this function can make several assumptions about the state of things
1662 * that allow for significant optimizations versus the standard function.
1663 * As a result we can do things like drop a frag and maintain an accurate
1664 * truesize for the skb.
1665 */
1666 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1667 struct sk_buff *skb)
1668 {
1669 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1670 unsigned char *va;
1671 unsigned int pull_len;
1672
1673 /*
1674 * it is valid to use page_address instead of kmap since we are
1675 * working with pages allocated out of the lomem pool per
1676 * alloc_page(GFP_ATOMIC)
1677 */
1678 va = skb_frag_address(frag);
1679
1680 /*
1681 * we need the header to contain the greater of either ETH_HLEN or
1682 * 60 bytes if the skb->len is less than 60 for skb_pad.
1683 */
1684 pull_len = ixgbe_get_headlen(va, IXGBE_RX_HDR_SIZE);
1685
1686 /* align pull length to size of long to optimize memcpy performance */
1687 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1688
1689 /* update all of the pointers */
1690 skb_frag_size_sub(frag, pull_len);
1691 frag->page_offset += pull_len;
1692 skb->data_len -= pull_len;
1693 skb->tail += pull_len;
1694 }
1695
1696 /**
1697 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1698 * @rx_ring: rx descriptor ring packet is being transacted on
1699 * @skb: pointer to current skb being updated
1700 *
1701 * This function provides a basic DMA sync up for the first fragment of an
1702 * skb. The reason for doing this is that the first fragment cannot be
1703 * unmapped until we have reached the end of packet descriptor for a buffer
1704 * chain.
1705 */
1706 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1707 struct sk_buff *skb)
1708 {
1709 /* if the page was released unmap it, else just sync our portion */
1710 if (unlikely(IXGBE_CB(skb)->page_released)) {
1711 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1712 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1713 IXGBE_CB(skb)->page_released = false;
1714 } else {
1715 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1716
1717 dma_sync_single_range_for_cpu(rx_ring->dev,
1718 IXGBE_CB(skb)->dma,
1719 frag->page_offset,
1720 ixgbe_rx_bufsz(rx_ring),
1721 DMA_FROM_DEVICE);
1722 }
1723 IXGBE_CB(skb)->dma = 0;
1724 }
1725
1726 /**
1727 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1728 * @rx_ring: rx descriptor ring packet is being transacted on
1729 * @rx_desc: pointer to the EOP Rx descriptor
1730 * @skb: pointer to current skb being fixed
1731 *
1732 * Check for corrupted packet headers caused by senders on the local L2
1733 * embedded NIC switch not setting up their Tx Descriptors right. These
1734 * should be very rare.
1735 *
1736 * Also address the case where we are pulling data in on pages only
1737 * and as such no data is present in the skb header.
1738 *
1739 * In addition if skb is not at least 60 bytes we need to pad it so that
1740 * it is large enough to qualify as a valid Ethernet frame.
1741 *
1742 * Returns true if an error was encountered and skb was freed.
1743 **/
1744 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1745 union ixgbe_adv_rx_desc *rx_desc,
1746 struct sk_buff *skb)
1747 {
1748 struct net_device *netdev = rx_ring->netdev;
1749
1750 /* verify that the packet does not have any known errors */
1751 if (unlikely(ixgbe_test_staterr(rx_desc,
1752 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1753 !(netdev->features & NETIF_F_RXALL))) {
1754 dev_kfree_skb_any(skb);
1755 return true;
1756 }
1757
1758 /* place header in linear portion of buffer */
1759 if (skb_is_nonlinear(skb))
1760 ixgbe_pull_tail(rx_ring, skb);
1761
1762 #ifdef IXGBE_FCOE
1763 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1764 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1765 return false;
1766
1767 #endif
1768 /* if skb_pad returns an error the skb was freed */
1769 if (unlikely(skb->len < 60)) {
1770 int pad_len = 60 - skb->len;
1771
1772 if (skb_pad(skb, pad_len))
1773 return true;
1774 __skb_put(skb, pad_len);
1775 }
1776
1777 return false;
1778 }
1779
1780 /**
1781 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1782 * @rx_ring: rx descriptor ring to store buffers on
1783 * @old_buff: donor buffer to have page reused
1784 *
1785 * Synchronizes page for reuse by the adapter
1786 **/
1787 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1788 struct ixgbe_rx_buffer *old_buff)
1789 {
1790 struct ixgbe_rx_buffer *new_buff;
1791 u16 nta = rx_ring->next_to_alloc;
1792
1793 new_buff = &rx_ring->rx_buffer_info[nta];
1794
1795 /* update, and store next to alloc */
1796 nta++;
1797 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1798
1799 /* transfer page from old buffer to new buffer */
1800 new_buff->page = old_buff->page;
1801 new_buff->dma = old_buff->dma;
1802 new_buff->page_offset = old_buff->page_offset;
1803
1804 /* sync the buffer for use by the device */
1805 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1806 new_buff->page_offset,
1807 ixgbe_rx_bufsz(rx_ring),
1808 DMA_FROM_DEVICE);
1809 }
1810
1811 /**
1812 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1813 * @rx_ring: rx descriptor ring to transact packets on
1814 * @rx_buffer: buffer containing page to add
1815 * @rx_desc: descriptor containing length of buffer written by hardware
1816 * @skb: sk_buff to place the data into
1817 *
1818 * This function will add the data contained in rx_buffer->page to the skb.
1819 * This is done either through a direct copy if the data in the buffer is
1820 * less than the skb header size, otherwise it will just attach the page as
1821 * a frag to the skb.
1822 *
1823 * The function will then update the page offset if necessary and return
1824 * true if the buffer can be reused by the adapter.
1825 **/
1826 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1827 struct ixgbe_rx_buffer *rx_buffer,
1828 union ixgbe_adv_rx_desc *rx_desc,
1829 struct sk_buff *skb)
1830 {
1831 struct page *page = rx_buffer->page;
1832 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1833 #if (PAGE_SIZE < 8192)
1834 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1835 #else
1836 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1837 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1838 ixgbe_rx_bufsz(rx_ring);
1839 #endif
1840
1841 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1842 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1843
1844 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1845
1846 /* we can reuse buffer as-is, just make sure it is local */
1847 if (likely(page_to_nid(page) == numa_node_id()))
1848 return true;
1849
1850 /* this page cannot be reused so discard it */
1851 put_page(page);
1852 return false;
1853 }
1854
1855 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1856 rx_buffer->page_offset, size, truesize);
1857
1858 /* avoid re-using remote pages */
1859 if (unlikely(page_to_nid(page) != numa_node_id()))
1860 return false;
1861
1862 #if (PAGE_SIZE < 8192)
1863 /* if we are only owner of page we can reuse it */
1864 if (unlikely(page_count(page) != 1))
1865 return false;
1866
1867 /* flip page offset to other buffer */
1868 rx_buffer->page_offset ^= truesize;
1869
1870 /*
1871 * since we are the only owner of the page and we need to
1872 * increment it, just set the value to 2 in order to avoid
1873 * an unecessary locked operation
1874 */
1875 atomic_set(&page->_count, 2);
1876 #else
1877 /* move offset up to the next cache line */
1878 rx_buffer->page_offset += truesize;
1879
1880 if (rx_buffer->page_offset > last_offset)
1881 return false;
1882
1883 /* bump ref count on page before it is given to the stack */
1884 get_page(page);
1885 #endif
1886
1887 return true;
1888 }
1889
1890 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
1891 union ixgbe_adv_rx_desc *rx_desc)
1892 {
1893 struct ixgbe_rx_buffer *rx_buffer;
1894 struct sk_buff *skb;
1895 struct page *page;
1896
1897 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
1898 page = rx_buffer->page;
1899 prefetchw(page);
1900
1901 skb = rx_buffer->skb;
1902
1903 if (likely(!skb)) {
1904 void *page_addr = page_address(page) +
1905 rx_buffer->page_offset;
1906
1907 /* prefetch first cache line of first page */
1908 prefetch(page_addr);
1909 #if L1_CACHE_BYTES < 128
1910 prefetch(page_addr + L1_CACHE_BYTES);
1911 #endif
1912
1913 /* allocate a skb to store the frags */
1914 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1915 IXGBE_RX_HDR_SIZE);
1916 if (unlikely(!skb)) {
1917 rx_ring->rx_stats.alloc_rx_buff_failed++;
1918 return NULL;
1919 }
1920
1921 /*
1922 * we will be copying header into skb->data in
1923 * pskb_may_pull so it is in our interest to prefetch
1924 * it now to avoid a possible cache miss
1925 */
1926 prefetchw(skb->data);
1927
1928 /*
1929 * Delay unmapping of the first packet. It carries the
1930 * header information, HW may still access the header
1931 * after the writeback. Only unmap it when EOP is
1932 * reached
1933 */
1934 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1935 goto dma_sync;
1936
1937 IXGBE_CB(skb)->dma = rx_buffer->dma;
1938 } else {
1939 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
1940 ixgbe_dma_sync_frag(rx_ring, skb);
1941
1942 dma_sync:
1943 /* we are reusing so sync this buffer for CPU use */
1944 dma_sync_single_range_for_cpu(rx_ring->dev,
1945 rx_buffer->dma,
1946 rx_buffer->page_offset,
1947 ixgbe_rx_bufsz(rx_ring),
1948 DMA_FROM_DEVICE);
1949 }
1950
1951 /* pull page into skb */
1952 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
1953 /* hand second half of page back to the ring */
1954 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
1955 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
1956 /* the page has been released from the ring */
1957 IXGBE_CB(skb)->page_released = true;
1958 } else {
1959 /* we are not reusing the buffer so unmap it */
1960 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
1961 ixgbe_rx_pg_size(rx_ring),
1962 DMA_FROM_DEVICE);
1963 }
1964
1965 /* clear contents of buffer_info */
1966 rx_buffer->skb = NULL;
1967 rx_buffer->dma = 0;
1968 rx_buffer->page = NULL;
1969
1970 return skb;
1971 }
1972
1973 /**
1974 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
1975 * @q_vector: structure containing interrupt and ring information
1976 * @rx_ring: rx descriptor ring to transact packets on
1977 * @budget: Total limit on number of packets to process
1978 *
1979 * This function provides a "bounce buffer" approach to Rx interrupt
1980 * processing. The advantage to this is that on systems that have
1981 * expensive overhead for IOMMU access this provides a means of avoiding
1982 * it by maintaining the mapping of the page to the syste.
1983 *
1984 * Returns amount of work completed
1985 **/
1986 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1987 struct ixgbe_ring *rx_ring,
1988 const int budget)
1989 {
1990 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1991 #ifdef IXGBE_FCOE
1992 struct ixgbe_adapter *adapter = q_vector->adapter;
1993 int ddp_bytes;
1994 unsigned int mss = 0;
1995 #endif /* IXGBE_FCOE */
1996 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
1997
1998 do {
1999 union ixgbe_adv_rx_desc *rx_desc;
2000 struct sk_buff *skb;
2001
2002 /* return some buffers to hardware, one at a time is too slow */
2003 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2004 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2005 cleaned_count = 0;
2006 }
2007
2008 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2009
2010 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
2011 break;
2012
2013 /*
2014 * This memory barrier is needed to keep us from reading
2015 * any other fields out of the rx_desc until we know the
2016 * RXD_STAT_DD bit is set
2017 */
2018 rmb();
2019
2020 /* retrieve a buffer from the ring */
2021 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
2022
2023 /* exit if we failed to retrieve a buffer */
2024 if (!skb)
2025 break;
2026
2027 cleaned_count++;
2028
2029 /* place incomplete frames back on ring for completion */
2030 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2031 continue;
2032
2033 /* verify the packet layout is correct */
2034 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2035 continue;
2036
2037 /* probably a little skewed due to removing CRC */
2038 total_rx_bytes += skb->len;
2039
2040 /* populate checksum, timestamp, VLAN, and protocol */
2041 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2042
2043 #ifdef IXGBE_FCOE
2044 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2045 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2046 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2047 /* include DDPed FCoE data */
2048 if (ddp_bytes > 0) {
2049 if (!mss) {
2050 mss = rx_ring->netdev->mtu -
2051 sizeof(struct fcoe_hdr) -
2052 sizeof(struct fc_frame_header) -
2053 sizeof(struct fcoe_crc_eof);
2054 if (mss > 512)
2055 mss &= ~511;
2056 }
2057 total_rx_bytes += ddp_bytes;
2058 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2059 mss);
2060 }
2061 if (!ddp_bytes) {
2062 dev_kfree_skb_any(skb);
2063 continue;
2064 }
2065 }
2066
2067 #endif /* IXGBE_FCOE */
2068 skb_mark_napi_id(skb, &q_vector->napi);
2069 ixgbe_rx_skb(q_vector, skb);
2070
2071 /* update budget accounting */
2072 total_rx_packets++;
2073 } while (likely(total_rx_packets < budget));
2074
2075 u64_stats_update_begin(&rx_ring->syncp);
2076 rx_ring->stats.packets += total_rx_packets;
2077 rx_ring->stats.bytes += total_rx_bytes;
2078 u64_stats_update_end(&rx_ring->syncp);
2079 q_vector->rx.total_packets += total_rx_packets;
2080 q_vector->rx.total_bytes += total_rx_bytes;
2081
2082 if (cleaned_count)
2083 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2084
2085 return total_rx_packets;
2086 }
2087
2088 #ifdef CONFIG_NET_RX_BUSY_POLL
2089 /* must be called with local_bh_disable()d */
2090 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2091 {
2092 struct ixgbe_q_vector *q_vector =
2093 container_of(napi, struct ixgbe_q_vector, napi);
2094 struct ixgbe_adapter *adapter = q_vector->adapter;
2095 struct ixgbe_ring *ring;
2096 int found = 0;
2097
2098 if (test_bit(__IXGBE_DOWN, &adapter->state))
2099 return LL_FLUSH_FAILED;
2100
2101 if (!ixgbe_qv_lock_poll(q_vector))
2102 return LL_FLUSH_BUSY;
2103
2104 ixgbe_for_each_ring(ring, q_vector->rx) {
2105 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2106 #ifdef BP_EXTENDED_STATS
2107 if (found)
2108 ring->stats.cleaned += found;
2109 else
2110 ring->stats.misses++;
2111 #endif
2112 if (found)
2113 break;
2114 }
2115
2116 ixgbe_qv_unlock_poll(q_vector);
2117
2118 return found;
2119 }
2120 #endif /* CONFIG_NET_RX_BUSY_POLL */
2121
2122 /**
2123 * ixgbe_configure_msix - Configure MSI-X hardware
2124 * @adapter: board private structure
2125 *
2126 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2127 * interrupts.
2128 **/
2129 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2130 {
2131 struct ixgbe_q_vector *q_vector;
2132 int v_idx;
2133 u32 mask;
2134
2135 /* Populate MSIX to EITR Select */
2136 if (adapter->num_vfs > 32) {
2137 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2138 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2139 }
2140
2141 /*
2142 * Populate the IVAR table and set the ITR values to the
2143 * corresponding register.
2144 */
2145 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2146 struct ixgbe_ring *ring;
2147 q_vector = adapter->q_vector[v_idx];
2148
2149 ixgbe_for_each_ring(ring, q_vector->rx)
2150 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2151
2152 ixgbe_for_each_ring(ring, q_vector->tx)
2153 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2154
2155 ixgbe_write_eitr(q_vector);
2156 }
2157
2158 switch (adapter->hw.mac.type) {
2159 case ixgbe_mac_82598EB:
2160 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2161 v_idx);
2162 break;
2163 case ixgbe_mac_82599EB:
2164 case ixgbe_mac_X540:
2165 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2166 break;
2167 default:
2168 break;
2169 }
2170 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2171
2172 /* set up to autoclear timer, and the vectors */
2173 mask = IXGBE_EIMS_ENABLE_MASK;
2174 mask &= ~(IXGBE_EIMS_OTHER |
2175 IXGBE_EIMS_MAILBOX |
2176 IXGBE_EIMS_LSC);
2177
2178 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2179 }
2180
2181 enum latency_range {
2182 lowest_latency = 0,
2183 low_latency = 1,
2184 bulk_latency = 2,
2185 latency_invalid = 255
2186 };
2187
2188 /**
2189 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2190 * @q_vector: structure containing interrupt and ring information
2191 * @ring_container: structure containing ring performance data
2192 *
2193 * Stores a new ITR value based on packets and byte
2194 * counts during the last interrupt. The advantage of per interrupt
2195 * computation is faster updates and more accurate ITR for the current
2196 * traffic pattern. Constants in this function were computed
2197 * based on theoretical maximum wire speed and thresholds were set based
2198 * on testing data as well as attempting to minimize response time
2199 * while increasing bulk throughput.
2200 * this functionality is controlled by the InterruptThrottleRate module
2201 * parameter (see ixgbe_param.c)
2202 **/
2203 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2204 struct ixgbe_ring_container *ring_container)
2205 {
2206 int bytes = ring_container->total_bytes;
2207 int packets = ring_container->total_packets;
2208 u32 timepassed_us;
2209 u64 bytes_perint;
2210 u8 itr_setting = ring_container->itr;
2211
2212 if (packets == 0)
2213 return;
2214
2215 /* simple throttlerate management
2216 * 0-10MB/s lowest (100000 ints/s)
2217 * 10-20MB/s low (20000 ints/s)
2218 * 20-1249MB/s bulk (8000 ints/s)
2219 */
2220 /* what was last interrupt timeslice? */
2221 timepassed_us = q_vector->itr >> 2;
2222 if (timepassed_us == 0)
2223 return;
2224
2225 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2226
2227 switch (itr_setting) {
2228 case lowest_latency:
2229 if (bytes_perint > 10)
2230 itr_setting = low_latency;
2231 break;
2232 case low_latency:
2233 if (bytes_perint > 20)
2234 itr_setting = bulk_latency;
2235 else if (bytes_perint <= 10)
2236 itr_setting = lowest_latency;
2237 break;
2238 case bulk_latency:
2239 if (bytes_perint <= 20)
2240 itr_setting = low_latency;
2241 break;
2242 }
2243
2244 /* clear work counters since we have the values we need */
2245 ring_container->total_bytes = 0;
2246 ring_container->total_packets = 0;
2247
2248 /* write updated itr to ring container */
2249 ring_container->itr = itr_setting;
2250 }
2251
2252 /**
2253 * ixgbe_write_eitr - write EITR register in hardware specific way
2254 * @q_vector: structure containing interrupt and ring information
2255 *
2256 * This function is made to be called by ethtool and by the driver
2257 * when it needs to update EITR registers at runtime. Hardware
2258 * specific quirks/differences are taken care of here.
2259 */
2260 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2261 {
2262 struct ixgbe_adapter *adapter = q_vector->adapter;
2263 struct ixgbe_hw *hw = &adapter->hw;
2264 int v_idx = q_vector->v_idx;
2265 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2266
2267 switch (adapter->hw.mac.type) {
2268 case ixgbe_mac_82598EB:
2269 /* must write high and low 16 bits to reset counter */
2270 itr_reg |= (itr_reg << 16);
2271 break;
2272 case ixgbe_mac_82599EB:
2273 case ixgbe_mac_X540:
2274 /*
2275 * set the WDIS bit to not clear the timer bits and cause an
2276 * immediate assertion of the interrupt
2277 */
2278 itr_reg |= IXGBE_EITR_CNT_WDIS;
2279 break;
2280 default:
2281 break;
2282 }
2283 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2284 }
2285
2286 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2287 {
2288 u32 new_itr = q_vector->itr;
2289 u8 current_itr;
2290
2291 ixgbe_update_itr(q_vector, &q_vector->tx);
2292 ixgbe_update_itr(q_vector, &q_vector->rx);
2293
2294 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2295
2296 switch (current_itr) {
2297 /* counts and packets in update_itr are dependent on these numbers */
2298 case lowest_latency:
2299 new_itr = IXGBE_100K_ITR;
2300 break;
2301 case low_latency:
2302 new_itr = IXGBE_20K_ITR;
2303 break;
2304 case bulk_latency:
2305 new_itr = IXGBE_8K_ITR;
2306 break;
2307 default:
2308 break;
2309 }
2310
2311 if (new_itr != q_vector->itr) {
2312 /* do an exponential smoothing */
2313 new_itr = (10 * new_itr * q_vector->itr) /
2314 ((9 * new_itr) + q_vector->itr);
2315
2316 /* save the algorithm value here */
2317 q_vector->itr = new_itr;
2318
2319 ixgbe_write_eitr(q_vector);
2320 }
2321 }
2322
2323 /**
2324 * ixgbe_check_overtemp_subtask - check for over temperature
2325 * @adapter: pointer to adapter
2326 **/
2327 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2328 {
2329 struct ixgbe_hw *hw = &adapter->hw;
2330 u32 eicr = adapter->interrupt_event;
2331
2332 if (test_bit(__IXGBE_DOWN, &adapter->state))
2333 return;
2334
2335 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2336 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2337 return;
2338
2339 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2340
2341 switch (hw->device_id) {
2342 case IXGBE_DEV_ID_82599_T3_LOM:
2343 /*
2344 * Since the warning interrupt is for both ports
2345 * we don't have to check if:
2346 * - This interrupt wasn't for our port.
2347 * - We may have missed the interrupt so always have to
2348 * check if we got a LSC
2349 */
2350 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
2351 !(eicr & IXGBE_EICR_LSC))
2352 return;
2353
2354 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2355 u32 speed;
2356 bool link_up = false;
2357
2358 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2359
2360 if (link_up)
2361 return;
2362 }
2363
2364 /* Check if this is not due to overtemp */
2365 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2366 return;
2367
2368 break;
2369 default:
2370 if (!(eicr & IXGBE_EICR_GPI_SDP0))
2371 return;
2372 break;
2373 }
2374 e_crit(drv,
2375 "Network adapter has been stopped because it has over heated. "
2376 "Restart the computer. If the problem persists, "
2377 "power off the system and replace the adapter\n");
2378
2379 adapter->interrupt_event = 0;
2380 }
2381
2382 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2383 {
2384 struct ixgbe_hw *hw = &adapter->hw;
2385
2386 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2387 (eicr & IXGBE_EICR_GPI_SDP1)) {
2388 e_crit(probe, "Fan has stopped, replace the adapter\n");
2389 /* write to clear the interrupt */
2390 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2391 }
2392 }
2393
2394 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2395 {
2396 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2397 return;
2398
2399 switch (adapter->hw.mac.type) {
2400 case ixgbe_mac_82599EB:
2401 /*
2402 * Need to check link state so complete overtemp check
2403 * on service task
2404 */
2405 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
2406 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2407 adapter->interrupt_event = eicr;
2408 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2409 ixgbe_service_event_schedule(adapter);
2410 return;
2411 }
2412 return;
2413 case ixgbe_mac_X540:
2414 if (!(eicr & IXGBE_EICR_TS))
2415 return;
2416 break;
2417 default:
2418 return;
2419 }
2420
2421 e_crit(drv,
2422 "Network adapter has been stopped because it has over heated. "
2423 "Restart the computer. If the problem persists, "
2424 "power off the system and replace the adapter\n");
2425 }
2426
2427 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2428 {
2429 struct ixgbe_hw *hw = &adapter->hw;
2430
2431 if (eicr & IXGBE_EICR_GPI_SDP2) {
2432 /* Clear the interrupt */
2433 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
2434 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2435 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2436 ixgbe_service_event_schedule(adapter);
2437 }
2438 }
2439
2440 if (eicr & IXGBE_EICR_GPI_SDP1) {
2441 /* Clear the interrupt */
2442 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2443 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2444 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2445 ixgbe_service_event_schedule(adapter);
2446 }
2447 }
2448 }
2449
2450 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2451 {
2452 struct ixgbe_hw *hw = &adapter->hw;
2453
2454 adapter->lsc_int++;
2455 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2456 adapter->link_check_timeout = jiffies;
2457 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2458 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2459 IXGBE_WRITE_FLUSH(hw);
2460 ixgbe_service_event_schedule(adapter);
2461 }
2462 }
2463
2464 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2465 u64 qmask)
2466 {
2467 u32 mask;
2468 struct ixgbe_hw *hw = &adapter->hw;
2469
2470 switch (hw->mac.type) {
2471 case ixgbe_mac_82598EB:
2472 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2473 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2474 break;
2475 case ixgbe_mac_82599EB:
2476 case ixgbe_mac_X540:
2477 mask = (qmask & 0xFFFFFFFF);
2478 if (mask)
2479 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2480 mask = (qmask >> 32);
2481 if (mask)
2482 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2483 break;
2484 default:
2485 break;
2486 }
2487 /* skip the flush */
2488 }
2489
2490 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2491 u64 qmask)
2492 {
2493 u32 mask;
2494 struct ixgbe_hw *hw = &adapter->hw;
2495
2496 switch (hw->mac.type) {
2497 case ixgbe_mac_82598EB:
2498 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2499 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2500 break;
2501 case ixgbe_mac_82599EB:
2502 case ixgbe_mac_X540:
2503 mask = (qmask & 0xFFFFFFFF);
2504 if (mask)
2505 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2506 mask = (qmask >> 32);
2507 if (mask)
2508 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2509 break;
2510 default:
2511 break;
2512 }
2513 /* skip the flush */
2514 }
2515
2516 /**
2517 * ixgbe_irq_enable - Enable default interrupt generation settings
2518 * @adapter: board private structure
2519 **/
2520 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2521 bool flush)
2522 {
2523 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2524
2525 /* don't reenable LSC while waiting for link */
2526 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2527 mask &= ~IXGBE_EIMS_LSC;
2528
2529 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2530 switch (adapter->hw.mac.type) {
2531 case ixgbe_mac_82599EB:
2532 mask |= IXGBE_EIMS_GPI_SDP0;
2533 break;
2534 case ixgbe_mac_X540:
2535 mask |= IXGBE_EIMS_TS;
2536 break;
2537 default:
2538 break;
2539 }
2540 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2541 mask |= IXGBE_EIMS_GPI_SDP1;
2542 switch (adapter->hw.mac.type) {
2543 case ixgbe_mac_82599EB:
2544 mask |= IXGBE_EIMS_GPI_SDP1;
2545 mask |= IXGBE_EIMS_GPI_SDP2;
2546 case ixgbe_mac_X540:
2547 mask |= IXGBE_EIMS_ECC;
2548 mask |= IXGBE_EIMS_MAILBOX;
2549 break;
2550 default:
2551 break;
2552 }
2553
2554 if (adapter->hw.mac.type == ixgbe_mac_X540)
2555 mask |= IXGBE_EIMS_TIMESYNC;
2556
2557 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2558 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2559 mask |= IXGBE_EIMS_FLOW_DIR;
2560
2561 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2562 if (queues)
2563 ixgbe_irq_enable_queues(adapter, ~0);
2564 if (flush)
2565 IXGBE_WRITE_FLUSH(&adapter->hw);
2566 }
2567
2568 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2569 {
2570 struct ixgbe_adapter *adapter = data;
2571 struct ixgbe_hw *hw = &adapter->hw;
2572 u32 eicr;
2573
2574 /*
2575 * Workaround for Silicon errata. Use clear-by-write instead
2576 * of clear-by-read. Reading with EICS will return the
2577 * interrupt causes without clearing, which later be done
2578 * with the write to EICR.
2579 */
2580 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2581
2582 /* The lower 16bits of the EICR register are for the queue interrupts
2583 * which should be masked here in order to not accidently clear them if
2584 * the bits are high when ixgbe_msix_other is called. There is a race
2585 * condition otherwise which results in possible performance loss
2586 * especially if the ixgbe_msix_other interrupt is triggering
2587 * consistently (as it would when PPS is turned on for the X540 device)
2588 */
2589 eicr &= 0xFFFF0000;
2590
2591 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2592
2593 if (eicr & IXGBE_EICR_LSC)
2594 ixgbe_check_lsc(adapter);
2595
2596 if (eicr & IXGBE_EICR_MAILBOX)
2597 ixgbe_msg_task(adapter);
2598
2599 switch (hw->mac.type) {
2600 case ixgbe_mac_82599EB:
2601 case ixgbe_mac_X540:
2602 if (eicr & IXGBE_EICR_ECC)
2603 e_info(link, "Received unrecoverable ECC Err, please "
2604 "reboot\n");
2605 /* Handle Flow Director Full threshold interrupt */
2606 if (eicr & IXGBE_EICR_FLOW_DIR) {
2607 int reinit_count = 0;
2608 int i;
2609 for (i = 0; i < adapter->num_tx_queues; i++) {
2610 struct ixgbe_ring *ring = adapter->tx_ring[i];
2611 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2612 &ring->state))
2613 reinit_count++;
2614 }
2615 if (reinit_count) {
2616 /* no more flow director interrupts until after init */
2617 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2618 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2619 ixgbe_service_event_schedule(adapter);
2620 }
2621 }
2622 ixgbe_check_sfp_event(adapter, eicr);
2623 ixgbe_check_overtemp_event(adapter, eicr);
2624 break;
2625 default:
2626 break;
2627 }
2628
2629 ixgbe_check_fan_failure(adapter, eicr);
2630
2631 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2632 ixgbe_ptp_check_pps_event(adapter, eicr);
2633
2634 /* re-enable the original interrupt state, no lsc, no queues */
2635 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2636 ixgbe_irq_enable(adapter, false, false);
2637
2638 return IRQ_HANDLED;
2639 }
2640
2641 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2642 {
2643 struct ixgbe_q_vector *q_vector = data;
2644
2645 /* EIAM disabled interrupts (on this vector) for us */
2646
2647 if (q_vector->rx.ring || q_vector->tx.ring)
2648 napi_schedule(&q_vector->napi);
2649
2650 return IRQ_HANDLED;
2651 }
2652
2653 /**
2654 * ixgbe_poll - NAPI Rx polling callback
2655 * @napi: structure for representing this polling device
2656 * @budget: how many packets driver is allowed to clean
2657 *
2658 * This function is used for legacy and MSI, NAPI mode
2659 **/
2660 int ixgbe_poll(struct napi_struct *napi, int budget)
2661 {
2662 struct ixgbe_q_vector *q_vector =
2663 container_of(napi, struct ixgbe_q_vector, napi);
2664 struct ixgbe_adapter *adapter = q_vector->adapter;
2665 struct ixgbe_ring *ring;
2666 int per_ring_budget;
2667 bool clean_complete = true;
2668
2669 #ifdef CONFIG_IXGBE_DCA
2670 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2671 ixgbe_update_dca(q_vector);
2672 #endif
2673
2674 ixgbe_for_each_ring(ring, q_vector->tx)
2675 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
2676
2677 if (!ixgbe_qv_lock_napi(q_vector))
2678 return budget;
2679
2680 /* attempt to distribute budget to each queue fairly, but don't allow
2681 * the budget to go below 1 because we'll exit polling */
2682 if (q_vector->rx.count > 1)
2683 per_ring_budget = max(budget/q_vector->rx.count, 1);
2684 else
2685 per_ring_budget = budget;
2686
2687 ixgbe_for_each_ring(ring, q_vector->rx)
2688 clean_complete &= (ixgbe_clean_rx_irq(q_vector, ring,
2689 per_ring_budget) < per_ring_budget);
2690
2691 ixgbe_qv_unlock_napi(q_vector);
2692 /* If all work not completed, return budget and keep polling */
2693 if (!clean_complete)
2694 return budget;
2695
2696 /* all work done, exit the polling mode */
2697 napi_complete(napi);
2698 if (adapter->rx_itr_setting & 1)
2699 ixgbe_set_itr(q_vector);
2700 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2701 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2702
2703 return 0;
2704 }
2705
2706 /**
2707 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2708 * @adapter: board private structure
2709 *
2710 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2711 * interrupts from the kernel.
2712 **/
2713 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2714 {
2715 struct net_device *netdev = adapter->netdev;
2716 int vector, err;
2717 int ri = 0, ti = 0;
2718
2719 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2720 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2721 struct msix_entry *entry = &adapter->msix_entries[vector];
2722
2723 if (q_vector->tx.ring && q_vector->rx.ring) {
2724 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2725 "%s-%s-%d", netdev->name, "TxRx", ri++);
2726 ti++;
2727 } else if (q_vector->rx.ring) {
2728 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2729 "%s-%s-%d", netdev->name, "rx", ri++);
2730 } else if (q_vector->tx.ring) {
2731 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2732 "%s-%s-%d", netdev->name, "tx", ti++);
2733 } else {
2734 /* skip this unused q_vector */
2735 continue;
2736 }
2737 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2738 q_vector->name, q_vector);
2739 if (err) {
2740 e_err(probe, "request_irq failed for MSIX interrupt "
2741 "Error: %d\n", err);
2742 goto free_queue_irqs;
2743 }
2744 /* If Flow Director is enabled, set interrupt affinity */
2745 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2746 /* assign the mask for this irq */
2747 irq_set_affinity_hint(entry->vector,
2748 &q_vector->affinity_mask);
2749 }
2750 }
2751
2752 err = request_irq(adapter->msix_entries[vector].vector,
2753 ixgbe_msix_other, 0, netdev->name, adapter);
2754 if (err) {
2755 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2756 goto free_queue_irqs;
2757 }
2758
2759 return 0;
2760
2761 free_queue_irqs:
2762 while (vector) {
2763 vector--;
2764 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2765 NULL);
2766 free_irq(adapter->msix_entries[vector].vector,
2767 adapter->q_vector[vector]);
2768 }
2769 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2770 pci_disable_msix(adapter->pdev);
2771 kfree(adapter->msix_entries);
2772 adapter->msix_entries = NULL;
2773 return err;
2774 }
2775
2776 /**
2777 * ixgbe_intr - legacy mode Interrupt Handler
2778 * @irq: interrupt number
2779 * @data: pointer to a network interface device structure
2780 **/
2781 static irqreturn_t ixgbe_intr(int irq, void *data)
2782 {
2783 struct ixgbe_adapter *adapter = data;
2784 struct ixgbe_hw *hw = &adapter->hw;
2785 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2786 u32 eicr;
2787
2788 /*
2789 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2790 * before the read of EICR.
2791 */
2792 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2793
2794 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2795 * therefore no explicit interrupt disable is necessary */
2796 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2797 if (!eicr) {
2798 /*
2799 * shared interrupt alert!
2800 * make sure interrupts are enabled because the read will
2801 * have disabled interrupts due to EIAM
2802 * finish the workaround of silicon errata on 82598. Unmask
2803 * the interrupt that we masked before the EICR read.
2804 */
2805 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2806 ixgbe_irq_enable(adapter, true, true);
2807 return IRQ_NONE; /* Not our interrupt */
2808 }
2809
2810 if (eicr & IXGBE_EICR_LSC)
2811 ixgbe_check_lsc(adapter);
2812
2813 switch (hw->mac.type) {
2814 case ixgbe_mac_82599EB:
2815 ixgbe_check_sfp_event(adapter, eicr);
2816 /* Fall through */
2817 case ixgbe_mac_X540:
2818 if (eicr & IXGBE_EICR_ECC)
2819 e_info(link, "Received unrecoverable ECC err, please "
2820 "reboot\n");
2821 ixgbe_check_overtemp_event(adapter, eicr);
2822 break;
2823 default:
2824 break;
2825 }
2826
2827 ixgbe_check_fan_failure(adapter, eicr);
2828 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2829 ixgbe_ptp_check_pps_event(adapter, eicr);
2830
2831 /* would disable interrupts here but EIAM disabled it */
2832 napi_schedule(&q_vector->napi);
2833
2834 /*
2835 * re-enable link(maybe) and non-queue interrupts, no flush.
2836 * ixgbe_poll will re-enable the queue interrupts
2837 */
2838 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2839 ixgbe_irq_enable(adapter, false, false);
2840
2841 return IRQ_HANDLED;
2842 }
2843
2844 /**
2845 * ixgbe_request_irq - initialize interrupts
2846 * @adapter: board private structure
2847 *
2848 * Attempts to configure interrupts using the best available
2849 * capabilities of the hardware and kernel.
2850 **/
2851 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2852 {
2853 struct net_device *netdev = adapter->netdev;
2854 int err;
2855
2856 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2857 err = ixgbe_request_msix_irqs(adapter);
2858 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2859 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2860 netdev->name, adapter);
2861 else
2862 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2863 netdev->name, adapter);
2864
2865 if (err)
2866 e_err(probe, "request_irq failed, Error %d\n", err);
2867
2868 return err;
2869 }
2870
2871 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2872 {
2873 int vector;
2874
2875 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2876 free_irq(adapter->pdev->irq, adapter);
2877 return;
2878 }
2879
2880 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2881 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2882 struct msix_entry *entry = &adapter->msix_entries[vector];
2883
2884 /* free only the irqs that were actually requested */
2885 if (!q_vector->rx.ring && !q_vector->tx.ring)
2886 continue;
2887
2888 /* clear the affinity_mask in the IRQ descriptor */
2889 irq_set_affinity_hint(entry->vector, NULL);
2890
2891 free_irq(entry->vector, q_vector);
2892 }
2893
2894 free_irq(adapter->msix_entries[vector++].vector, adapter);
2895 }
2896
2897 /**
2898 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2899 * @adapter: board private structure
2900 **/
2901 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2902 {
2903 switch (adapter->hw.mac.type) {
2904 case ixgbe_mac_82598EB:
2905 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2906 break;
2907 case ixgbe_mac_82599EB:
2908 case ixgbe_mac_X540:
2909 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2910 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2911 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2912 break;
2913 default:
2914 break;
2915 }
2916 IXGBE_WRITE_FLUSH(&adapter->hw);
2917 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2918 int vector;
2919
2920 for (vector = 0; vector < adapter->num_q_vectors; vector++)
2921 synchronize_irq(adapter->msix_entries[vector].vector);
2922
2923 synchronize_irq(adapter->msix_entries[vector++].vector);
2924 } else {
2925 synchronize_irq(adapter->pdev->irq);
2926 }
2927 }
2928
2929 /**
2930 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2931 *
2932 **/
2933 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2934 {
2935 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2936
2937 ixgbe_write_eitr(q_vector);
2938
2939 ixgbe_set_ivar(adapter, 0, 0, 0);
2940 ixgbe_set_ivar(adapter, 1, 0, 0);
2941
2942 e_info(hw, "Legacy interrupt IVAR setup done\n");
2943 }
2944
2945 /**
2946 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2947 * @adapter: board private structure
2948 * @ring: structure containing ring specific data
2949 *
2950 * Configure the Tx descriptor ring after a reset.
2951 **/
2952 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2953 struct ixgbe_ring *ring)
2954 {
2955 struct ixgbe_hw *hw = &adapter->hw;
2956 u64 tdba = ring->dma;
2957 int wait_loop = 10;
2958 u32 txdctl = IXGBE_TXDCTL_ENABLE;
2959 u8 reg_idx = ring->reg_idx;
2960
2961 /* disable queue to avoid issues while updating state */
2962 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2963 IXGBE_WRITE_FLUSH(hw);
2964
2965 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2966 (tdba & DMA_BIT_MASK(32)));
2967 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2968 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2969 ring->count * sizeof(union ixgbe_adv_tx_desc));
2970 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2971 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2972 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2973
2974 /*
2975 * set WTHRESH to encourage burst writeback, it should not be set
2976 * higher than 1 when:
2977 * - ITR is 0 as it could cause false TX hangs
2978 * - ITR is set to > 100k int/sec and BQL is enabled
2979 *
2980 * In order to avoid issues WTHRESH + PTHRESH should always be equal
2981 * to or less than the number of on chip descriptors, which is
2982 * currently 40.
2983 */
2984 #if IS_ENABLED(CONFIG_BQL)
2985 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
2986 #else
2987 if (!ring->q_vector || (ring->q_vector->itr < 8))
2988 #endif
2989 txdctl |= (1 << 16); /* WTHRESH = 1 */
2990 else
2991 txdctl |= (8 << 16); /* WTHRESH = 8 */
2992
2993 /*
2994 * Setting PTHRESH to 32 both improves performance
2995 * and avoids a TX hang with DFP enabled
2996 */
2997 txdctl |= (1 << 8) | /* HTHRESH = 1 */
2998 32; /* PTHRESH = 32 */
2999
3000 /* reinitialize flowdirector state */
3001 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3002 ring->atr_sample_rate = adapter->atr_sample_rate;
3003 ring->atr_count = 0;
3004 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3005 } else {
3006 ring->atr_sample_rate = 0;
3007 }
3008
3009 /* initialize XPS */
3010 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3011 struct ixgbe_q_vector *q_vector = ring->q_vector;
3012
3013 if (q_vector)
3014 netif_set_xps_queue(ring->netdev,
3015 &q_vector->affinity_mask,
3016 ring->queue_index);
3017 }
3018
3019 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3020
3021 /* enable queue */
3022 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3023
3024 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3025 if (hw->mac.type == ixgbe_mac_82598EB &&
3026 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3027 return;
3028
3029 /* poll to verify queue is enabled */
3030 do {
3031 usleep_range(1000, 2000);
3032 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3033 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3034 if (!wait_loop)
3035 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
3036 }
3037
3038 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3039 {
3040 struct ixgbe_hw *hw = &adapter->hw;
3041 u32 rttdcs, mtqc;
3042 u8 tcs = netdev_get_num_tc(adapter->netdev);
3043
3044 if (hw->mac.type == ixgbe_mac_82598EB)
3045 return;
3046
3047 /* disable the arbiter while setting MTQC */
3048 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3049 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3050 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3051
3052 /* set transmit pool layout */
3053 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3054 mtqc = IXGBE_MTQC_VT_ENA;
3055 if (tcs > 4)
3056 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3057 else if (tcs > 1)
3058 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3059 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3060 mtqc |= IXGBE_MTQC_32VF;
3061 else
3062 mtqc |= IXGBE_MTQC_64VF;
3063 } else {
3064 if (tcs > 4)
3065 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3066 else if (tcs > 1)
3067 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3068 else
3069 mtqc = IXGBE_MTQC_64Q_1PB;
3070 }
3071
3072 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3073
3074 /* Enable Security TX Buffer IFG for multiple pb */
3075 if (tcs) {
3076 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3077 sectx |= IXGBE_SECTX_DCB;
3078 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3079 }
3080
3081 /* re-enable the arbiter */
3082 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3083 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3084 }
3085
3086 /**
3087 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3088 * @adapter: board private structure
3089 *
3090 * Configure the Tx unit of the MAC after a reset.
3091 **/
3092 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3093 {
3094 struct ixgbe_hw *hw = &adapter->hw;
3095 u32 dmatxctl;
3096 u32 i;
3097
3098 ixgbe_setup_mtqc(adapter);
3099
3100 if (hw->mac.type != ixgbe_mac_82598EB) {
3101 /* DMATXCTL.EN must be before Tx queues are enabled */
3102 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3103 dmatxctl |= IXGBE_DMATXCTL_TE;
3104 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3105 }
3106
3107 /* Setup the HW Tx Head and Tail descriptor pointers */
3108 for (i = 0; i < adapter->num_tx_queues; i++)
3109 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3110 }
3111
3112 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3113 struct ixgbe_ring *ring)
3114 {
3115 struct ixgbe_hw *hw = &adapter->hw;
3116 u8 reg_idx = ring->reg_idx;
3117 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3118
3119 srrctl |= IXGBE_SRRCTL_DROP_EN;
3120
3121 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3122 }
3123
3124 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3125 struct ixgbe_ring *ring)
3126 {
3127 struct ixgbe_hw *hw = &adapter->hw;
3128 u8 reg_idx = ring->reg_idx;
3129 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3130
3131 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3132
3133 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3134 }
3135
3136 #ifdef CONFIG_IXGBE_DCB
3137 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3138 #else
3139 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3140 #endif
3141 {
3142 int i;
3143 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3144
3145 if (adapter->ixgbe_ieee_pfc)
3146 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3147
3148 /*
3149 * We should set the drop enable bit if:
3150 * SR-IOV is enabled
3151 * or
3152 * Number of Rx queues > 1 and flow control is disabled
3153 *
3154 * This allows us to avoid head of line blocking for security
3155 * and performance reasons.
3156 */
3157 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3158 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3159 for (i = 0; i < adapter->num_rx_queues; i++)
3160 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3161 } else {
3162 for (i = 0; i < adapter->num_rx_queues; i++)
3163 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3164 }
3165 }
3166
3167 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3168
3169 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3170 struct ixgbe_ring *rx_ring)
3171 {
3172 struct ixgbe_hw *hw = &adapter->hw;
3173 u32 srrctl;
3174 u8 reg_idx = rx_ring->reg_idx;
3175
3176 if (hw->mac.type == ixgbe_mac_82598EB) {
3177 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3178
3179 /*
3180 * if VMDq is not active we must program one srrctl register
3181 * per RSS queue since we have enabled RDRXCTL.MVMEN
3182 */
3183 reg_idx &= mask;
3184 }
3185
3186 /* configure header buffer length, needed for RSC */
3187 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3188
3189 /* configure the packet buffer length */
3190 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3191
3192 /* configure descriptor type */
3193 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3194
3195 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3196 }
3197
3198 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3199 {
3200 struct ixgbe_hw *hw = &adapter->hw;
3201 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
3202 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
3203 0x6A3E67EA, 0x14364D17, 0x3BED200D};
3204 u32 mrqc = 0, reta = 0;
3205 u32 rxcsum;
3206 int i, j;
3207 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3208
3209 /*
3210 * Program table for at least 2 queues w/ SR-IOV so that VFs can
3211 * make full use of any rings they may have. We will use the
3212 * PSRTYPE register to control how many rings we use within the PF.
3213 */
3214 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3215 rss_i = 2;
3216
3217 /* Fill out hash function seeds */
3218 for (i = 0; i < 10; i++)
3219 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
3220
3221 /* Fill out redirection table */
3222 for (i = 0, j = 0; i < 128; i++, j++) {
3223 if (j == rss_i)
3224 j = 0;
3225 /* reta = 4-byte sliding window of
3226 * 0x00..(indices-1)(indices-1)00..etc. */
3227 reta = (reta << 8) | (j * 0x11);
3228 if ((i & 3) == 3)
3229 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3230 }
3231
3232 /* Disable indicating checksum in descriptor, enables RSS hash */
3233 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3234 rxcsum |= IXGBE_RXCSUM_PCSD;
3235 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3236
3237 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3238 if (adapter->ring_feature[RING_F_RSS].mask)
3239 mrqc = IXGBE_MRQC_RSSEN;
3240 } else {
3241 u8 tcs = netdev_get_num_tc(adapter->netdev);
3242
3243 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3244 if (tcs > 4)
3245 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3246 else if (tcs > 1)
3247 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3248 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3249 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3250 else
3251 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3252 } else {
3253 if (tcs > 4)
3254 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3255 else if (tcs > 1)
3256 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3257 else
3258 mrqc = IXGBE_MRQC_RSSEN;
3259 }
3260 }
3261
3262 /* Perform hash on these packet types */
3263 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3264 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3265 IXGBE_MRQC_RSS_FIELD_IPV6 |
3266 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3267
3268 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3269 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3270 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3271 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3272
3273 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3274 }
3275
3276 /**
3277 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3278 * @adapter: address of board private structure
3279 * @index: index of ring to set
3280 **/
3281 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3282 struct ixgbe_ring *ring)
3283 {
3284 struct ixgbe_hw *hw = &adapter->hw;
3285 u32 rscctrl;
3286 u8 reg_idx = ring->reg_idx;
3287
3288 if (!ring_is_rsc_enabled(ring))
3289 return;
3290
3291 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3292 rscctrl |= IXGBE_RSCCTL_RSCEN;
3293 /*
3294 * we must limit the number of descriptors so that the
3295 * total size of max desc * buf_len is not greater
3296 * than 65536
3297 */
3298 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3299 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3300 }
3301
3302 #define IXGBE_MAX_RX_DESC_POLL 10
3303 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3304 struct ixgbe_ring *ring)
3305 {
3306 struct ixgbe_hw *hw = &adapter->hw;
3307 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3308 u32 rxdctl;
3309 u8 reg_idx = ring->reg_idx;
3310
3311 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3312 if (hw->mac.type == ixgbe_mac_82598EB &&
3313 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3314 return;
3315
3316 do {
3317 usleep_range(1000, 2000);
3318 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3319 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3320
3321 if (!wait_loop) {
3322 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3323 "the polling period\n", reg_idx);
3324 }
3325 }
3326
3327 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3328 struct ixgbe_ring *ring)
3329 {
3330 struct ixgbe_hw *hw = &adapter->hw;
3331 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3332 u32 rxdctl;
3333 u8 reg_idx = ring->reg_idx;
3334
3335 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3336 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3337
3338 /* write value back with RXDCTL.ENABLE bit cleared */
3339 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3340
3341 if (hw->mac.type == ixgbe_mac_82598EB &&
3342 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3343 return;
3344
3345 /* the hardware may take up to 100us to really disable the rx queue */
3346 do {
3347 udelay(10);
3348 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3349 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3350
3351 if (!wait_loop) {
3352 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3353 "the polling period\n", reg_idx);
3354 }
3355 }
3356
3357 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3358 struct ixgbe_ring *ring)
3359 {
3360 struct ixgbe_hw *hw = &adapter->hw;
3361 u64 rdba = ring->dma;
3362 u32 rxdctl;
3363 u8 reg_idx = ring->reg_idx;
3364
3365 /* disable queue to avoid issues while updating state */
3366 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3367 ixgbe_disable_rx_queue(adapter, ring);
3368
3369 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3370 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3371 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3372 ring->count * sizeof(union ixgbe_adv_rx_desc));
3373 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3374 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3375 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3376
3377 ixgbe_configure_srrctl(adapter, ring);
3378 ixgbe_configure_rscctl(adapter, ring);
3379
3380 if (hw->mac.type == ixgbe_mac_82598EB) {
3381 /*
3382 * enable cache line friendly hardware writes:
3383 * PTHRESH=32 descriptors (half the internal cache),
3384 * this also removes ugly rx_no_buffer_count increment
3385 * HTHRESH=4 descriptors (to minimize latency on fetch)
3386 * WTHRESH=8 burst writeback up to two cache lines
3387 */
3388 rxdctl &= ~0x3FFFFF;
3389 rxdctl |= 0x080420;
3390 }
3391
3392 /* enable receive descriptor ring */
3393 rxdctl |= IXGBE_RXDCTL_ENABLE;
3394 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3395
3396 ixgbe_rx_desc_queue_enable(adapter, ring);
3397 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3398 }
3399
3400 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3401 {
3402 struct ixgbe_hw *hw = &adapter->hw;
3403 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3404 u16 pool;
3405
3406 /* PSRTYPE must be initialized in non 82598 adapters */
3407 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3408 IXGBE_PSRTYPE_UDPHDR |
3409 IXGBE_PSRTYPE_IPV4HDR |
3410 IXGBE_PSRTYPE_L2HDR |
3411 IXGBE_PSRTYPE_IPV6HDR;
3412
3413 if (hw->mac.type == ixgbe_mac_82598EB)
3414 return;
3415
3416 if (rss_i > 3)
3417 psrtype |= 2 << 29;
3418 else if (rss_i > 1)
3419 psrtype |= 1 << 29;
3420
3421 for_each_set_bit(pool, &adapter->fwd_bitmask, 32)
3422 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
3423 }
3424
3425 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3426 {
3427 struct ixgbe_hw *hw = &adapter->hw;
3428 u32 reg_offset, vf_shift;
3429 u32 gcr_ext, vmdctl;
3430 int i;
3431
3432 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3433 return;
3434
3435 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3436 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3437 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3438 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3439 vmdctl |= IXGBE_VT_CTL_REPLEN;
3440 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3441
3442 vf_shift = VMDQ_P(0) % 32;
3443 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3444
3445 /* Enable only the PF's pool for Tx/Rx */
3446 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3447 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3448 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3449 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3450 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
3451 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3452
3453 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3454 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3455
3456 /*
3457 * Set up VF register offsets for selected VT Mode,
3458 * i.e. 32 or 64 VFs for SR-IOV
3459 */
3460 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3461 case IXGBE_82599_VMDQ_8Q_MASK:
3462 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3463 break;
3464 case IXGBE_82599_VMDQ_4Q_MASK:
3465 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3466 break;
3467 default:
3468 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3469 break;
3470 }
3471
3472 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3473
3474
3475 /* Enable MAC Anti-Spoofing */
3476 hw->mac.ops.set_mac_anti_spoofing(hw, (adapter->num_vfs != 0),
3477 adapter->num_vfs);
3478 /* For VFs that have spoof checking turned off */
3479 for (i = 0; i < adapter->num_vfs; i++) {
3480 if (!adapter->vfinfo[i].spoofchk_enabled)
3481 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3482 }
3483 }
3484
3485 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3486 {
3487 struct ixgbe_hw *hw = &adapter->hw;
3488 struct net_device *netdev = adapter->netdev;
3489 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3490 struct ixgbe_ring *rx_ring;
3491 int i;
3492 u32 mhadd, hlreg0;
3493
3494 #ifdef IXGBE_FCOE
3495 /* adjust max frame to be able to do baby jumbo for FCoE */
3496 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3497 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3498 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3499
3500 #endif /* IXGBE_FCOE */
3501
3502 /* adjust max frame to be at least the size of a standard frame */
3503 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3504 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3505
3506 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3507 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3508 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3509 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3510
3511 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3512 }
3513
3514 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3515 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3516 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3517 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3518
3519 /*
3520 * Setup the HW Rx Head and Tail Descriptor Pointers and
3521 * the Base and Length of the Rx Descriptor Ring
3522 */
3523 for (i = 0; i < adapter->num_rx_queues; i++) {
3524 rx_ring = adapter->rx_ring[i];
3525 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3526 set_ring_rsc_enabled(rx_ring);
3527 else
3528 clear_ring_rsc_enabled(rx_ring);
3529 }
3530 }
3531
3532 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3533 {
3534 struct ixgbe_hw *hw = &adapter->hw;
3535 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3536
3537 switch (hw->mac.type) {
3538 case ixgbe_mac_82598EB:
3539 /*
3540 * For VMDq support of different descriptor types or
3541 * buffer sizes through the use of multiple SRRCTL
3542 * registers, RDRXCTL.MVMEN must be set to 1
3543 *
3544 * also, the manual doesn't mention it clearly but DCA hints
3545 * will only use queue 0's tags unless this bit is set. Side
3546 * effects of setting this bit are only that SRRCTL must be
3547 * fully programmed [0..15]
3548 */
3549 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3550 break;
3551 case ixgbe_mac_82599EB:
3552 case ixgbe_mac_X540:
3553 /* Disable RSC for ACK packets */
3554 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3555 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3556 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3557 /* hardware requires some bits to be set by default */
3558 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3559 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3560 break;
3561 default:
3562 /* We should do nothing since we don't know this hardware */
3563 return;
3564 }
3565
3566 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3567 }
3568
3569 /**
3570 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3571 * @adapter: board private structure
3572 *
3573 * Configure the Rx unit of the MAC after a reset.
3574 **/
3575 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3576 {
3577 struct ixgbe_hw *hw = &adapter->hw;
3578 int i;
3579 u32 rxctrl, rfctl;
3580
3581 /* disable receives while setting up the descriptors */
3582 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3583 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3584
3585 ixgbe_setup_psrtype(adapter);
3586 ixgbe_setup_rdrxctl(adapter);
3587
3588 /* RSC Setup */
3589 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3590 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3591 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3592 rfctl |= IXGBE_RFCTL_RSC_DIS;
3593 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3594
3595 /* Program registers for the distribution of queues */
3596 ixgbe_setup_mrqc(adapter);
3597
3598 /* set_rx_buffer_len must be called before ring initialization */
3599 ixgbe_set_rx_buffer_len(adapter);
3600
3601 /*
3602 * Setup the HW Rx Head and Tail Descriptor Pointers and
3603 * the Base and Length of the Rx Descriptor Ring
3604 */
3605 for (i = 0; i < adapter->num_rx_queues; i++)
3606 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3607
3608 /* disable drop enable for 82598 parts */
3609 if (hw->mac.type == ixgbe_mac_82598EB)
3610 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3611
3612 /* enable all receives */
3613 rxctrl |= IXGBE_RXCTRL_RXEN;
3614 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3615 }
3616
3617 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3618 __be16 proto, u16 vid)
3619 {
3620 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3621 struct ixgbe_hw *hw = &adapter->hw;
3622
3623 /* add VID to filter table */
3624 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true);
3625 set_bit(vid, adapter->active_vlans);
3626
3627 return 0;
3628 }
3629
3630 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
3631 __be16 proto, u16 vid)
3632 {
3633 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3634 struct ixgbe_hw *hw = &adapter->hw;
3635
3636 /* remove VID from filter table */
3637 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), false);
3638 clear_bit(vid, adapter->active_vlans);
3639
3640 return 0;
3641 }
3642
3643 /**
3644 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3645 * @adapter: driver data
3646 */
3647 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3648 {
3649 struct ixgbe_hw *hw = &adapter->hw;
3650 u32 vlnctrl;
3651
3652 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3653 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3654 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3655 }
3656
3657 /**
3658 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3659 * @adapter: driver data
3660 */
3661 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3662 {
3663 struct ixgbe_hw *hw = &adapter->hw;
3664 u32 vlnctrl;
3665
3666 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3667 vlnctrl |= IXGBE_VLNCTRL_VFE;
3668 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3669 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3670 }
3671
3672 /**
3673 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3674 * @adapter: driver data
3675 */
3676 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3677 {
3678 struct ixgbe_hw *hw = &adapter->hw;
3679 u32 vlnctrl;
3680 int i, j;
3681
3682 switch (hw->mac.type) {
3683 case ixgbe_mac_82598EB:
3684 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3685 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3686 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3687 break;
3688 case ixgbe_mac_82599EB:
3689 case ixgbe_mac_X540:
3690 for (i = 0; i < adapter->num_rx_queues; i++) {
3691 struct ixgbe_ring *ring = adapter->rx_ring[i];
3692
3693 if (ring->l2_accel_priv)
3694 continue;
3695 j = ring->reg_idx;
3696 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3697 vlnctrl &= ~IXGBE_RXDCTL_VME;
3698 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3699 }
3700 break;
3701 default:
3702 break;
3703 }
3704 }
3705
3706 /**
3707 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3708 * @adapter: driver data
3709 */
3710 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3711 {
3712 struct ixgbe_hw *hw = &adapter->hw;
3713 u32 vlnctrl;
3714 int i, j;
3715
3716 switch (hw->mac.type) {
3717 case ixgbe_mac_82598EB:
3718 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3719 vlnctrl |= IXGBE_VLNCTRL_VME;
3720 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3721 break;
3722 case ixgbe_mac_82599EB:
3723 case ixgbe_mac_X540:
3724 for (i = 0; i < adapter->num_rx_queues; i++) {
3725 struct ixgbe_ring *ring = adapter->rx_ring[i];
3726
3727 if (ring->l2_accel_priv)
3728 continue;
3729 j = ring->reg_idx;
3730 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3731 vlnctrl |= IXGBE_RXDCTL_VME;
3732 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3733 }
3734 break;
3735 default:
3736 break;
3737 }
3738 }
3739
3740 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3741 {
3742 u16 vid;
3743
3744 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
3745
3746 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3747 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
3748 }
3749
3750 /**
3751 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3752 * @netdev: network interface device structure
3753 *
3754 * Writes unicast address list to the RAR table.
3755 * Returns: -ENOMEM on failure/insufficient address space
3756 * 0 on no addresses written
3757 * X on writing X addresses to the RAR table
3758 **/
3759 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3760 {
3761 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3762 struct ixgbe_hw *hw = &adapter->hw;
3763 unsigned int rar_entries = hw->mac.num_rar_entries - 1;
3764 int count = 0;
3765
3766 /* In SR-IOV/VMDQ modes significantly less RAR entries are available */
3767 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3768 rar_entries = IXGBE_MAX_PF_MACVLANS - 1;
3769
3770 /* return ENOMEM indicating insufficient memory for addresses */
3771 if (netdev_uc_count(netdev) > rar_entries)
3772 return -ENOMEM;
3773
3774 if (!netdev_uc_empty(netdev)) {
3775 struct netdev_hw_addr *ha;
3776 /* return error if we do not support writing to RAR table */
3777 if (!hw->mac.ops.set_rar)
3778 return -ENOMEM;
3779
3780 netdev_for_each_uc_addr(ha, netdev) {
3781 if (!rar_entries)
3782 break;
3783 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3784 VMDQ_P(0), IXGBE_RAH_AV);
3785 count++;
3786 }
3787 }
3788 /* write the addresses in reverse order to avoid write combining */
3789 for (; rar_entries > 0 ; rar_entries--)
3790 hw->mac.ops.clear_rar(hw, rar_entries);
3791
3792 return count;
3793 }
3794
3795 /**
3796 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3797 * @netdev: network interface device structure
3798 *
3799 * The set_rx_method entry point is called whenever the unicast/multicast
3800 * address list or the network interface flags are updated. This routine is
3801 * responsible for configuring the hardware for proper unicast, multicast and
3802 * promiscuous mode.
3803 **/
3804 void ixgbe_set_rx_mode(struct net_device *netdev)
3805 {
3806 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3807 struct ixgbe_hw *hw = &adapter->hw;
3808 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3809 int count;
3810
3811 /* Check for Promiscuous and All Multicast modes */
3812
3813 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3814
3815 /* set all bits that we expect to always be set */
3816 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
3817 fctrl |= IXGBE_FCTRL_BAM;
3818 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3819 fctrl |= IXGBE_FCTRL_PMCF;
3820
3821 /* clear the bits we are changing the status of */
3822 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3823
3824 if (netdev->flags & IFF_PROMISC) {
3825 hw->addr_ctrl.user_set_promisc = true;
3826 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3827 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3828 /* Only disable hardware filter vlans in promiscuous mode
3829 * if SR-IOV and VMDQ are disabled - otherwise ensure
3830 * that hardware VLAN filters remain enabled.
3831 */
3832 if (!(adapter->flags & (IXGBE_FLAG_VMDQ_ENABLED |
3833 IXGBE_FLAG_SRIOV_ENABLED)))
3834 ixgbe_vlan_filter_disable(adapter);
3835 else
3836 ixgbe_vlan_filter_enable(adapter);
3837 } else {
3838 if (netdev->flags & IFF_ALLMULTI) {
3839 fctrl |= IXGBE_FCTRL_MPE;
3840 vmolr |= IXGBE_VMOLR_MPE;
3841 }
3842 ixgbe_vlan_filter_enable(adapter);
3843 hw->addr_ctrl.user_set_promisc = false;
3844 }
3845
3846 /*
3847 * Write addresses to available RAR registers, if there is not
3848 * sufficient space to store all the addresses then enable
3849 * unicast promiscuous mode
3850 */
3851 count = ixgbe_write_uc_addr_list(netdev);
3852 if (count < 0) {
3853 fctrl |= IXGBE_FCTRL_UPE;
3854 vmolr |= IXGBE_VMOLR_ROPE;
3855 }
3856
3857 /* Write addresses to the MTA, if the attempt fails
3858 * then we should just turn on promiscuous mode so
3859 * that we can at least receive multicast traffic
3860 */
3861 hw->mac.ops.update_mc_addr_list(hw, netdev);
3862 vmolr |= IXGBE_VMOLR_ROMPE;
3863
3864 if (adapter->num_vfs)
3865 ixgbe_restore_vf_multicasts(adapter);
3866
3867 if (hw->mac.type != ixgbe_mac_82598EB) {
3868 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
3869 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3870 IXGBE_VMOLR_ROPE);
3871 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
3872 }
3873
3874 /* This is useful for sniffing bad packets. */
3875 if (adapter->netdev->features & NETIF_F_RXALL) {
3876 /* UPE and MPE will be handled by normal PROMISC logic
3877 * in e1000e_set_rx_mode */
3878 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
3879 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
3880 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
3881
3882 fctrl &= ~(IXGBE_FCTRL_DPF);
3883 /* NOTE: VLAN filtering is disabled by setting PROMISC */
3884 }
3885
3886 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3887
3888 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
3889 ixgbe_vlan_strip_enable(adapter);
3890 else
3891 ixgbe_vlan_strip_disable(adapter);
3892 }
3893
3894 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3895 {
3896 int q_idx;
3897
3898 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
3899 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
3900 napi_enable(&adapter->q_vector[q_idx]->napi);
3901 }
3902 }
3903
3904 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3905 {
3906 int q_idx;
3907
3908 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
3909 napi_disable(&adapter->q_vector[q_idx]->napi);
3910 while (!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
3911 pr_info("QV %d locked\n", q_idx);
3912 usleep_range(1000, 20000);
3913 }
3914 }
3915 }
3916
3917 #ifdef CONFIG_IXGBE_DCB
3918 /**
3919 * ixgbe_configure_dcb - Configure DCB hardware
3920 * @adapter: ixgbe adapter struct
3921 *
3922 * This is called by the driver on open to configure the DCB hardware.
3923 * This is also called by the gennetlink interface when reconfiguring
3924 * the DCB state.
3925 */
3926 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3927 {
3928 struct ixgbe_hw *hw = &adapter->hw;
3929 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3930
3931 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3932 if (hw->mac.type == ixgbe_mac_82598EB)
3933 netif_set_gso_max_size(adapter->netdev, 65536);
3934 return;
3935 }
3936
3937 if (hw->mac.type == ixgbe_mac_82598EB)
3938 netif_set_gso_max_size(adapter->netdev, 32768);
3939
3940 #ifdef IXGBE_FCOE
3941 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3942 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3943 #endif
3944
3945 /* reconfigure the hardware */
3946 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3947 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3948 DCB_TX_CONFIG);
3949 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3950 DCB_RX_CONFIG);
3951 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3952 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
3953 ixgbe_dcb_hw_ets(&adapter->hw,
3954 adapter->ixgbe_ieee_ets,
3955 max_frame);
3956 ixgbe_dcb_hw_pfc_config(&adapter->hw,
3957 adapter->ixgbe_ieee_pfc->pfc_en,
3958 adapter->ixgbe_ieee_ets->prio_tc);
3959 }
3960
3961 /* Enable RSS Hash per TC */
3962 if (hw->mac.type != ixgbe_mac_82598EB) {
3963 u32 msb = 0;
3964 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
3965
3966 while (rss_i) {
3967 msb++;
3968 rss_i >>= 1;
3969 }
3970
3971 /* write msb to all 8 TCs in one write */
3972 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
3973 }
3974 }
3975 #endif
3976
3977 /* Additional bittime to account for IXGBE framing */
3978 #define IXGBE_ETH_FRAMING 20
3979
3980 /**
3981 * ixgbe_hpbthresh - calculate high water mark for flow control
3982 *
3983 * @adapter: board private structure to calculate for
3984 * @pb: packet buffer to calculate
3985 */
3986 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3987 {
3988 struct ixgbe_hw *hw = &adapter->hw;
3989 struct net_device *dev = adapter->netdev;
3990 int link, tc, kb, marker;
3991 u32 dv_id, rx_pba;
3992
3993 /* Calculate max LAN frame size */
3994 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3995
3996 #ifdef IXGBE_FCOE
3997 /* FCoE traffic class uses FCOE jumbo frames */
3998 if ((dev->features & NETIF_F_FCOE_MTU) &&
3999 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4000 (pb == ixgbe_fcoe_get_tc(adapter)))
4001 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4002
4003 #endif
4004 /* Calculate delay value for device */
4005 switch (hw->mac.type) {
4006 case ixgbe_mac_X540:
4007 dv_id = IXGBE_DV_X540(link, tc);
4008 break;
4009 default:
4010 dv_id = IXGBE_DV(link, tc);
4011 break;
4012 }
4013
4014 /* Loopback switch introduces additional latency */
4015 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4016 dv_id += IXGBE_B2BT(tc);
4017
4018 /* Delay value is calculated in bit times convert to KB */
4019 kb = IXGBE_BT2KB(dv_id);
4020 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4021
4022 marker = rx_pba - kb;
4023
4024 /* It is possible that the packet buffer is not large enough
4025 * to provide required headroom. In this case throw an error
4026 * to user and a do the best we can.
4027 */
4028 if (marker < 0) {
4029 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4030 "headroom to support flow control."
4031 "Decrease MTU or number of traffic classes\n", pb);
4032 marker = tc + 1;
4033 }
4034
4035 return marker;
4036 }
4037
4038 /**
4039 * ixgbe_lpbthresh - calculate low water mark for for flow control
4040 *
4041 * @adapter: board private structure to calculate for
4042 * @pb: packet buffer to calculate
4043 */
4044 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
4045 {
4046 struct ixgbe_hw *hw = &adapter->hw;
4047 struct net_device *dev = adapter->netdev;
4048 int tc;
4049 u32 dv_id;
4050
4051 /* Calculate max LAN frame size */
4052 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4053
4054 /* Calculate delay value for device */
4055 switch (hw->mac.type) {
4056 case ixgbe_mac_X540:
4057 dv_id = IXGBE_LOW_DV_X540(tc);
4058 break;
4059 default:
4060 dv_id = IXGBE_LOW_DV(tc);
4061 break;
4062 }
4063
4064 /* Delay value is calculated in bit times convert to KB */
4065 return IXGBE_BT2KB(dv_id);
4066 }
4067
4068 /*
4069 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4070 */
4071 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4072 {
4073 struct ixgbe_hw *hw = &adapter->hw;
4074 int num_tc = netdev_get_num_tc(adapter->netdev);
4075 int i;
4076
4077 if (!num_tc)
4078 num_tc = 1;
4079
4080 hw->fc.low_water = ixgbe_lpbthresh(adapter);
4081
4082 for (i = 0; i < num_tc; i++) {
4083 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4084
4085 /* Low water marks must not be larger than high water marks */
4086 if (hw->fc.low_water > hw->fc.high_water[i])
4087 hw->fc.low_water = 0;
4088 }
4089 }
4090
4091 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4092 {
4093 struct ixgbe_hw *hw = &adapter->hw;
4094 int hdrm;
4095 u8 tc = netdev_get_num_tc(adapter->netdev);
4096
4097 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4098 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4099 hdrm = 32 << adapter->fdir_pballoc;
4100 else
4101 hdrm = 0;
4102
4103 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
4104 ixgbe_pbthresh_setup(adapter);
4105 }
4106
4107 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4108 {
4109 struct ixgbe_hw *hw = &adapter->hw;
4110 struct hlist_node *node2;
4111 struct ixgbe_fdir_filter *filter;
4112
4113 spin_lock(&adapter->fdir_perfect_lock);
4114
4115 if (!hlist_empty(&adapter->fdir_filter_list))
4116 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4117
4118 hlist_for_each_entry_safe(filter, node2,
4119 &adapter->fdir_filter_list, fdir_node) {
4120 ixgbe_fdir_write_perfect_filter_82599(hw,
4121 &filter->filter,
4122 filter->sw_idx,
4123 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4124 IXGBE_FDIR_DROP_QUEUE :
4125 adapter->rx_ring[filter->action]->reg_idx);
4126 }
4127
4128 spin_unlock(&adapter->fdir_perfect_lock);
4129 }
4130
4131 static void ixgbe_macvlan_set_rx_mode(struct net_device *dev, unsigned int pool,
4132 struct ixgbe_adapter *adapter)
4133 {
4134 struct ixgbe_hw *hw = &adapter->hw;
4135 u32 vmolr;
4136
4137 /* No unicast promiscuous support for VMDQ devices. */
4138 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
4139 vmolr |= (IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
4140
4141 /* clear the affected bit */
4142 vmolr &= ~IXGBE_VMOLR_MPE;
4143
4144 if (dev->flags & IFF_ALLMULTI) {
4145 vmolr |= IXGBE_VMOLR_MPE;
4146 } else {
4147 vmolr |= IXGBE_VMOLR_ROMPE;
4148 hw->mac.ops.update_mc_addr_list(hw, dev);
4149 }
4150 ixgbe_write_uc_addr_list(adapter->netdev);
4151 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
4152 }
4153
4154 static void ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
4155 u8 *addr, u16 pool)
4156 {
4157 struct ixgbe_hw *hw = &adapter->hw;
4158 unsigned int entry;
4159
4160 entry = hw->mac.num_rar_entries - pool;
4161 hw->mac.ops.set_rar(hw, entry, addr, VMDQ_P(pool), IXGBE_RAH_AV);
4162 }
4163
4164 static void ixgbe_fwd_psrtype(struct ixgbe_fwd_adapter *vadapter)
4165 {
4166 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4167 int rss_i = adapter->num_rx_queues_per_pool;
4168 struct ixgbe_hw *hw = &adapter->hw;
4169 u16 pool = vadapter->pool;
4170 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4171 IXGBE_PSRTYPE_UDPHDR |
4172 IXGBE_PSRTYPE_IPV4HDR |
4173 IXGBE_PSRTYPE_L2HDR |
4174 IXGBE_PSRTYPE_IPV6HDR;
4175
4176 if (hw->mac.type == ixgbe_mac_82598EB)
4177 return;
4178
4179 if (rss_i > 3)
4180 psrtype |= 2 << 29;
4181 else if (rss_i > 1)
4182 psrtype |= 1 << 29;
4183
4184 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4185 }
4186
4187 /**
4188 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4189 * @rx_ring: ring to free buffers from
4190 **/
4191 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4192 {
4193 struct device *dev = rx_ring->dev;
4194 unsigned long size;
4195 u16 i;
4196
4197 /* ring already cleared, nothing to do */
4198 if (!rx_ring->rx_buffer_info)
4199 return;
4200
4201 /* Free all the Rx ring sk_buffs */
4202 for (i = 0; i < rx_ring->count; i++) {
4203 struct ixgbe_rx_buffer *rx_buffer;
4204
4205 rx_buffer = &rx_ring->rx_buffer_info[i];
4206 if (rx_buffer->skb) {
4207 struct sk_buff *skb = rx_buffer->skb;
4208 if (IXGBE_CB(skb)->page_released) {
4209 dma_unmap_page(dev,
4210 IXGBE_CB(skb)->dma,
4211 ixgbe_rx_bufsz(rx_ring),
4212 DMA_FROM_DEVICE);
4213 IXGBE_CB(skb)->page_released = false;
4214 }
4215 dev_kfree_skb(skb);
4216 }
4217 rx_buffer->skb = NULL;
4218 if (rx_buffer->dma)
4219 dma_unmap_page(dev, rx_buffer->dma,
4220 ixgbe_rx_pg_size(rx_ring),
4221 DMA_FROM_DEVICE);
4222 rx_buffer->dma = 0;
4223 if (rx_buffer->page)
4224 __free_pages(rx_buffer->page,
4225 ixgbe_rx_pg_order(rx_ring));
4226 rx_buffer->page = NULL;
4227 }
4228
4229 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4230 memset(rx_ring->rx_buffer_info, 0, size);
4231
4232 /* Zero out the descriptor ring */
4233 memset(rx_ring->desc, 0, rx_ring->size);
4234
4235 rx_ring->next_to_alloc = 0;
4236 rx_ring->next_to_clean = 0;
4237 rx_ring->next_to_use = 0;
4238 }
4239
4240 static void ixgbe_disable_fwd_ring(struct ixgbe_fwd_adapter *vadapter,
4241 struct ixgbe_ring *rx_ring)
4242 {
4243 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4244 int index = rx_ring->queue_index + vadapter->rx_base_queue;
4245
4246 /* shutdown specific queue receive and wait for dma to settle */
4247 ixgbe_disable_rx_queue(adapter, rx_ring);
4248 usleep_range(10000, 20000);
4249 ixgbe_irq_disable_queues(adapter, ((u64)1 << index));
4250 ixgbe_clean_rx_ring(rx_ring);
4251 rx_ring->l2_accel_priv = NULL;
4252 }
4253
4254 static int ixgbe_fwd_ring_down(struct net_device *vdev,
4255 struct ixgbe_fwd_adapter *accel)
4256 {
4257 struct ixgbe_adapter *adapter = accel->real_adapter;
4258 unsigned int rxbase = accel->rx_base_queue;
4259 unsigned int txbase = accel->tx_base_queue;
4260 int i;
4261
4262 netif_tx_stop_all_queues(vdev);
4263
4264 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4265 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4266 adapter->rx_ring[rxbase + i]->netdev = adapter->netdev;
4267 }
4268
4269 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4270 adapter->tx_ring[txbase + i]->l2_accel_priv = NULL;
4271 adapter->tx_ring[txbase + i]->netdev = adapter->netdev;
4272 }
4273
4274
4275 return 0;
4276 }
4277
4278 static int ixgbe_fwd_ring_up(struct net_device *vdev,
4279 struct ixgbe_fwd_adapter *accel)
4280 {
4281 struct ixgbe_adapter *adapter = accel->real_adapter;
4282 unsigned int rxbase, txbase, queues;
4283 int i, baseq, err = 0;
4284
4285 if (!test_bit(accel->pool, &adapter->fwd_bitmask))
4286 return 0;
4287
4288 baseq = accel->pool * adapter->num_rx_queues_per_pool;
4289 netdev_dbg(vdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
4290 accel->pool, adapter->num_rx_pools,
4291 baseq, baseq + adapter->num_rx_queues_per_pool,
4292 adapter->fwd_bitmask);
4293
4294 accel->netdev = vdev;
4295 accel->rx_base_queue = rxbase = baseq;
4296 accel->tx_base_queue = txbase = baseq;
4297
4298 for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
4299 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4300
4301 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4302 adapter->rx_ring[rxbase + i]->netdev = vdev;
4303 adapter->rx_ring[rxbase + i]->l2_accel_priv = accel;
4304 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[rxbase + i]);
4305 }
4306
4307 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4308 adapter->tx_ring[txbase + i]->netdev = vdev;
4309 adapter->tx_ring[txbase + i]->l2_accel_priv = accel;
4310 }
4311
4312 queues = min_t(unsigned int,
4313 adapter->num_rx_queues_per_pool, vdev->num_tx_queues);
4314 err = netif_set_real_num_tx_queues(vdev, queues);
4315 if (err)
4316 goto fwd_queue_err;
4317
4318 err = netif_set_real_num_rx_queues(vdev, queues);
4319 if (err)
4320 goto fwd_queue_err;
4321
4322 if (is_valid_ether_addr(vdev->dev_addr))
4323 ixgbe_add_mac_filter(adapter, vdev->dev_addr, accel->pool);
4324
4325 ixgbe_fwd_psrtype(accel);
4326 ixgbe_macvlan_set_rx_mode(vdev, accel->pool, adapter);
4327 return err;
4328 fwd_queue_err:
4329 ixgbe_fwd_ring_down(vdev, accel);
4330 return err;
4331 }
4332
4333 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
4334 {
4335 struct net_device *upper;
4336 struct list_head *iter;
4337 int err;
4338
4339 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
4340 if (netif_is_macvlan(upper)) {
4341 struct macvlan_dev *dfwd = netdev_priv(upper);
4342 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
4343
4344 if (dfwd->fwd_priv) {
4345 err = ixgbe_fwd_ring_up(upper, vadapter);
4346 if (err)
4347 continue;
4348 }
4349 }
4350 }
4351 }
4352
4353 static void ixgbe_configure(struct ixgbe_adapter *adapter)
4354 {
4355 struct ixgbe_hw *hw = &adapter->hw;
4356
4357 ixgbe_configure_pb(adapter);
4358 #ifdef CONFIG_IXGBE_DCB
4359 ixgbe_configure_dcb(adapter);
4360 #endif
4361 /*
4362 * We must restore virtualization before VLANs or else
4363 * the VLVF registers will not be populated
4364 */
4365 ixgbe_configure_virtualization(adapter);
4366
4367 ixgbe_set_rx_mode(adapter->netdev);
4368 ixgbe_restore_vlan(adapter);
4369
4370 switch (hw->mac.type) {
4371 case ixgbe_mac_82599EB:
4372 case ixgbe_mac_X540:
4373 hw->mac.ops.disable_rx_buff(hw);
4374 break;
4375 default:
4376 break;
4377 }
4378
4379 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4380 ixgbe_init_fdir_signature_82599(&adapter->hw,
4381 adapter->fdir_pballoc);
4382 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
4383 ixgbe_init_fdir_perfect_82599(&adapter->hw,
4384 adapter->fdir_pballoc);
4385 ixgbe_fdir_filter_restore(adapter);
4386 }
4387
4388 switch (hw->mac.type) {
4389 case ixgbe_mac_82599EB:
4390 case ixgbe_mac_X540:
4391 hw->mac.ops.enable_rx_buff(hw);
4392 break;
4393 default:
4394 break;
4395 }
4396
4397 #ifdef IXGBE_FCOE
4398 /* configure FCoE L2 filters, redirection table, and Rx control */
4399 ixgbe_configure_fcoe(adapter);
4400
4401 #endif /* IXGBE_FCOE */
4402 ixgbe_configure_tx(adapter);
4403 ixgbe_configure_rx(adapter);
4404 ixgbe_configure_dfwd(adapter);
4405 }
4406
4407 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
4408 {
4409 switch (hw->phy.type) {
4410 case ixgbe_phy_sfp_avago:
4411 case ixgbe_phy_sfp_ftl:
4412 case ixgbe_phy_sfp_intel:
4413 case ixgbe_phy_sfp_unknown:
4414 case ixgbe_phy_sfp_passive_tyco:
4415 case ixgbe_phy_sfp_passive_unknown:
4416 case ixgbe_phy_sfp_active_unknown:
4417 case ixgbe_phy_sfp_ftl_active:
4418 case ixgbe_phy_qsfp_passive_unknown:
4419 case ixgbe_phy_qsfp_active_unknown:
4420 case ixgbe_phy_qsfp_intel:
4421 case ixgbe_phy_qsfp_unknown:
4422 return true;
4423 case ixgbe_phy_nl:
4424 if (hw->mac.type == ixgbe_mac_82598EB)
4425 return true;
4426 default:
4427 return false;
4428 }
4429 }
4430
4431 /**
4432 * ixgbe_sfp_link_config - set up SFP+ link
4433 * @adapter: pointer to private adapter struct
4434 **/
4435 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
4436 {
4437 /*
4438 * We are assuming the worst case scenario here, and that
4439 * is that an SFP was inserted/removed after the reset
4440 * but before SFP detection was enabled. As such the best
4441 * solution is to just start searching as soon as we start
4442 */
4443 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
4444 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
4445
4446 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
4447 }
4448
4449 /**
4450 * ixgbe_non_sfp_link_config - set up non-SFP+ link
4451 * @hw: pointer to private hardware struct
4452 *
4453 * Returns 0 on success, negative on failure
4454 **/
4455 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
4456 {
4457 u32 speed;
4458 bool autoneg, link_up = false;
4459 u32 ret = IXGBE_ERR_LINK_SETUP;
4460
4461 if (hw->mac.ops.check_link)
4462 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
4463
4464 if (ret)
4465 goto link_cfg_out;
4466
4467 speed = hw->phy.autoneg_advertised;
4468 if ((!speed) && (hw->mac.ops.get_link_capabilities))
4469 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
4470 &autoneg);
4471 if (ret)
4472 goto link_cfg_out;
4473
4474 if (hw->mac.ops.setup_link)
4475 ret = hw->mac.ops.setup_link(hw, speed, link_up);
4476 link_cfg_out:
4477 return ret;
4478 }
4479
4480 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
4481 {
4482 struct ixgbe_hw *hw = &adapter->hw;
4483 u32 gpie = 0;
4484
4485 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4486 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
4487 IXGBE_GPIE_OCD;
4488 gpie |= IXGBE_GPIE_EIAME;
4489 /*
4490 * use EIAM to auto-mask when MSI-X interrupt is asserted
4491 * this saves a register write for every interrupt
4492 */
4493 switch (hw->mac.type) {
4494 case ixgbe_mac_82598EB:
4495 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4496 break;
4497 case ixgbe_mac_82599EB:
4498 case ixgbe_mac_X540:
4499 default:
4500 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
4501 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
4502 break;
4503 }
4504 } else {
4505 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
4506 * specifically only auto mask tx and rx interrupts */
4507 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4508 }
4509
4510 /* XXX: to interrupt immediately for EICS writes, enable this */
4511 /* gpie |= IXGBE_GPIE_EIMEN; */
4512
4513 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
4514 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
4515
4516 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
4517 case IXGBE_82599_VMDQ_8Q_MASK:
4518 gpie |= IXGBE_GPIE_VTMODE_16;
4519 break;
4520 case IXGBE_82599_VMDQ_4Q_MASK:
4521 gpie |= IXGBE_GPIE_VTMODE_32;
4522 break;
4523 default:
4524 gpie |= IXGBE_GPIE_VTMODE_64;
4525 break;
4526 }
4527 }
4528
4529 /* Enable Thermal over heat sensor interrupt */
4530 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
4531 switch (adapter->hw.mac.type) {
4532 case ixgbe_mac_82599EB:
4533 gpie |= IXGBE_SDP0_GPIEN;
4534 break;
4535 case ixgbe_mac_X540:
4536 gpie |= IXGBE_EIMS_TS;
4537 break;
4538 default:
4539 break;
4540 }
4541 }
4542
4543 /* Enable fan failure interrupt */
4544 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
4545 gpie |= IXGBE_SDP1_GPIEN;
4546
4547 if (hw->mac.type == ixgbe_mac_82599EB) {
4548 gpie |= IXGBE_SDP1_GPIEN;
4549 gpie |= IXGBE_SDP2_GPIEN;
4550 }
4551
4552 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
4553 }
4554
4555 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
4556 {
4557 struct ixgbe_hw *hw = &adapter->hw;
4558 struct net_device *upper;
4559 struct list_head *iter;
4560 int err;
4561 u32 ctrl_ext;
4562
4563 ixgbe_get_hw_control(adapter);
4564 ixgbe_setup_gpie(adapter);
4565
4566 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4567 ixgbe_configure_msix(adapter);
4568 else
4569 ixgbe_configure_msi_and_legacy(adapter);
4570
4571 /* enable the optics for 82599 SFP+ fiber */
4572 if (hw->mac.ops.enable_tx_laser)
4573 hw->mac.ops.enable_tx_laser(hw);
4574
4575 clear_bit(__IXGBE_DOWN, &adapter->state);
4576 ixgbe_napi_enable_all(adapter);
4577
4578 if (ixgbe_is_sfp(hw)) {
4579 ixgbe_sfp_link_config(adapter);
4580 } else {
4581 err = ixgbe_non_sfp_link_config(hw);
4582 if (err)
4583 e_err(probe, "link_config FAILED %d\n", err);
4584 }
4585
4586 /* clear any pending interrupts, may auto mask */
4587 IXGBE_READ_REG(hw, IXGBE_EICR);
4588 ixgbe_irq_enable(adapter, true, true);
4589
4590 /*
4591 * If this adapter has a fan, check to see if we had a failure
4592 * before we enabled the interrupt.
4593 */
4594 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
4595 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
4596 if (esdp & IXGBE_ESDP_SDP1)
4597 e_crit(drv, "Fan has stopped, replace the adapter\n");
4598 }
4599
4600 /* enable transmits */
4601 netif_tx_start_all_queues(adapter->netdev);
4602
4603 /* enable any upper devices */
4604 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
4605 if (netif_is_macvlan(upper)) {
4606 struct macvlan_dev *vlan = netdev_priv(upper);
4607
4608 if (vlan->fwd_priv)
4609 netif_tx_start_all_queues(upper);
4610 }
4611 }
4612
4613 /* bring the link up in the watchdog, this could race with our first
4614 * link up interrupt but shouldn't be a problem */
4615 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4616 adapter->link_check_timeout = jiffies;
4617 mod_timer(&adapter->service_timer, jiffies);
4618
4619 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4620 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4621 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4622 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
4623 }
4624
4625 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4626 {
4627 WARN_ON(in_interrupt());
4628 /* put off any impending NetWatchDogTimeout */
4629 adapter->netdev->trans_start = jiffies;
4630
4631 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
4632 usleep_range(1000, 2000);
4633 ixgbe_down(adapter);
4634 /*
4635 * If SR-IOV enabled then wait a bit before bringing the adapter
4636 * back up to give the VFs time to respond to the reset. The
4637 * two second wait is based upon the watchdog timer cycle in
4638 * the VF driver.
4639 */
4640 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4641 msleep(2000);
4642 ixgbe_up(adapter);
4643 clear_bit(__IXGBE_RESETTING, &adapter->state);
4644 }
4645
4646 void ixgbe_up(struct ixgbe_adapter *adapter)
4647 {
4648 /* hardware has been reset, we need to reload some things */
4649 ixgbe_configure(adapter);
4650
4651 ixgbe_up_complete(adapter);
4652 }
4653
4654 void ixgbe_reset(struct ixgbe_adapter *adapter)
4655 {
4656 struct ixgbe_hw *hw = &adapter->hw;
4657 int err;
4658
4659 /* lock SFP init bit to prevent race conditions with the watchdog */
4660 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4661 usleep_range(1000, 2000);
4662
4663 /* clear all SFP and link config related flags while holding SFP_INIT */
4664 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4665 IXGBE_FLAG2_SFP_NEEDS_RESET);
4666 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4667
4668 err = hw->mac.ops.init_hw(hw);
4669 switch (err) {
4670 case 0:
4671 case IXGBE_ERR_SFP_NOT_PRESENT:
4672 case IXGBE_ERR_SFP_NOT_SUPPORTED:
4673 break;
4674 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
4675 e_dev_err("master disable timed out\n");
4676 break;
4677 case IXGBE_ERR_EEPROM_VERSION:
4678 /* We are running on a pre-production device, log a warning */
4679 e_dev_warn("This device is a pre-production adapter/LOM. "
4680 "Please be aware there may be issues associated with "
4681 "your hardware. If you are experiencing problems "
4682 "please contact your Intel or hardware "
4683 "representative who provided you with this "
4684 "hardware.\n");
4685 break;
4686 default:
4687 e_dev_err("Hardware Error: %d\n", err);
4688 }
4689
4690 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4691
4692 /* reprogram the RAR[0] in case user changed it. */
4693 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
4694
4695 /* update SAN MAC vmdq pool selection */
4696 if (hw->mac.san_mac_rar_index)
4697 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
4698
4699 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
4700 ixgbe_ptp_reset(adapter);
4701 }
4702
4703 /**
4704 * ixgbe_clean_tx_ring - Free Tx Buffers
4705 * @tx_ring: ring to be cleaned
4706 **/
4707 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4708 {
4709 struct ixgbe_tx_buffer *tx_buffer_info;
4710 unsigned long size;
4711 u16 i;
4712
4713 /* ring already cleared, nothing to do */
4714 if (!tx_ring->tx_buffer_info)
4715 return;
4716
4717 /* Free all the Tx ring sk_buffs */
4718 for (i = 0; i < tx_ring->count; i++) {
4719 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4720 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4721 }
4722
4723 netdev_tx_reset_queue(txring_txq(tx_ring));
4724
4725 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4726 memset(tx_ring->tx_buffer_info, 0, size);
4727
4728 /* Zero out the descriptor ring */
4729 memset(tx_ring->desc, 0, tx_ring->size);
4730
4731 tx_ring->next_to_use = 0;
4732 tx_ring->next_to_clean = 0;
4733 }
4734
4735 /**
4736 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4737 * @adapter: board private structure
4738 **/
4739 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4740 {
4741 int i;
4742
4743 for (i = 0; i < adapter->num_rx_queues; i++)
4744 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4745 }
4746
4747 /**
4748 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4749 * @adapter: board private structure
4750 **/
4751 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4752 {
4753 int i;
4754
4755 for (i = 0; i < adapter->num_tx_queues; i++)
4756 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4757 }
4758
4759 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4760 {
4761 struct hlist_node *node2;
4762 struct ixgbe_fdir_filter *filter;
4763
4764 spin_lock(&adapter->fdir_perfect_lock);
4765
4766 hlist_for_each_entry_safe(filter, node2,
4767 &adapter->fdir_filter_list, fdir_node) {
4768 hlist_del(&filter->fdir_node);
4769 kfree(filter);
4770 }
4771 adapter->fdir_filter_count = 0;
4772
4773 spin_unlock(&adapter->fdir_perfect_lock);
4774 }
4775
4776 void ixgbe_down(struct ixgbe_adapter *adapter)
4777 {
4778 struct net_device *netdev = adapter->netdev;
4779 struct ixgbe_hw *hw = &adapter->hw;
4780 struct net_device *upper;
4781 struct list_head *iter;
4782 u32 rxctrl;
4783 int i;
4784
4785 /* signal that we are down to the interrupt handler */
4786 set_bit(__IXGBE_DOWN, &adapter->state);
4787
4788 /* disable receives */
4789 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4790 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4791
4792 /* disable all enabled rx queues */
4793 for (i = 0; i < adapter->num_rx_queues; i++)
4794 /* this call also flushes the previous write */
4795 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4796
4797 usleep_range(10000, 20000);
4798
4799 netif_tx_stop_all_queues(netdev);
4800
4801 /* call carrier off first to avoid false dev_watchdog timeouts */
4802 netif_carrier_off(netdev);
4803 netif_tx_disable(netdev);
4804
4805 /* disable any upper devices */
4806 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
4807 if (netif_is_macvlan(upper)) {
4808 struct macvlan_dev *vlan = netdev_priv(upper);
4809
4810 if (vlan->fwd_priv) {
4811 netif_tx_stop_all_queues(upper);
4812 netif_carrier_off(upper);
4813 netif_tx_disable(upper);
4814 }
4815 }
4816 }
4817
4818 ixgbe_irq_disable(adapter);
4819
4820 ixgbe_napi_disable_all(adapter);
4821
4822 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4823 IXGBE_FLAG2_RESET_REQUESTED);
4824 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4825
4826 del_timer_sync(&adapter->service_timer);
4827
4828 if (adapter->num_vfs) {
4829 /* Clear EITR Select mapping */
4830 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
4831
4832 /* Mark all the VFs as inactive */
4833 for (i = 0 ; i < adapter->num_vfs; i++)
4834 adapter->vfinfo[i].clear_to_send = false;
4835
4836 /* ping all the active vfs to let them know we are going down */
4837 ixgbe_ping_all_vfs(adapter);
4838
4839 /* Disable all VFTE/VFRE TX/RX */
4840 ixgbe_disable_tx_rx(adapter);
4841 }
4842
4843 /* disable transmits in the hardware now that interrupts are off */
4844 for (i = 0; i < adapter->num_tx_queues; i++) {
4845 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4846 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4847 }
4848
4849 /* Disable the Tx DMA engine on 82599 and X540 */
4850 switch (hw->mac.type) {
4851 case ixgbe_mac_82599EB:
4852 case ixgbe_mac_X540:
4853 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4854 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4855 ~IXGBE_DMATXCTL_TE));
4856 break;
4857 default:
4858 break;
4859 }
4860
4861 if (!pci_channel_offline(adapter->pdev))
4862 ixgbe_reset(adapter);
4863
4864 /* power down the optics for 82599 SFP+ fiber */
4865 if (hw->mac.ops.disable_tx_laser)
4866 hw->mac.ops.disable_tx_laser(hw);
4867
4868 ixgbe_clean_all_tx_rings(adapter);
4869 ixgbe_clean_all_rx_rings(adapter);
4870
4871 #ifdef CONFIG_IXGBE_DCA
4872 /* since we reset the hardware DCA settings were cleared */
4873 ixgbe_setup_dca(adapter);
4874 #endif
4875 }
4876
4877 /**
4878 * ixgbe_tx_timeout - Respond to a Tx Hang
4879 * @netdev: network interface device structure
4880 **/
4881 static void ixgbe_tx_timeout(struct net_device *netdev)
4882 {
4883 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4884
4885 /* Do the reset outside of interrupt context */
4886 ixgbe_tx_timeout_reset(adapter);
4887 }
4888
4889 /**
4890 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4891 * @adapter: board private structure to initialize
4892 *
4893 * ixgbe_sw_init initializes the Adapter private data structure.
4894 * Fields are initialized based on PCI device information and
4895 * OS network device settings (MTU size).
4896 **/
4897 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
4898 {
4899 struct ixgbe_hw *hw = &adapter->hw;
4900 struct pci_dev *pdev = adapter->pdev;
4901 unsigned int rss, fdir;
4902 u32 fwsm;
4903 #ifdef CONFIG_IXGBE_DCB
4904 int j;
4905 struct tc_configuration *tc;
4906 #endif
4907
4908 /* PCI config space info */
4909
4910 hw->vendor_id = pdev->vendor;
4911 hw->device_id = pdev->device;
4912 hw->revision_id = pdev->revision;
4913 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4914 hw->subsystem_device_id = pdev->subsystem_device;
4915
4916 /* Set common capability flags and settings */
4917 rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus());
4918 adapter->ring_feature[RING_F_RSS].limit = rss;
4919 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4920 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4921 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
4922 adapter->atr_sample_rate = 20;
4923 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
4924 adapter->ring_feature[RING_F_FDIR].limit = fdir;
4925 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4926 #ifdef CONFIG_IXGBE_DCA
4927 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
4928 #endif
4929 #ifdef IXGBE_FCOE
4930 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4931 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4932 #ifdef CONFIG_IXGBE_DCB
4933 /* Default traffic class to use for FCoE */
4934 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4935 #endif /* CONFIG_IXGBE_DCB */
4936 #endif /* IXGBE_FCOE */
4937
4938 /* Set MAC specific capability flags and exceptions */
4939 switch (hw->mac.type) {
4940 case ixgbe_mac_82598EB:
4941 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
4942 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
4943
4944 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4945 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4946
4947 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
4948 adapter->ring_feature[RING_F_FDIR].limit = 0;
4949 adapter->atr_sample_rate = 0;
4950 adapter->fdir_pballoc = 0;
4951 #ifdef IXGBE_FCOE
4952 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
4953 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4954 #ifdef CONFIG_IXGBE_DCB
4955 adapter->fcoe.up = 0;
4956 #endif /* IXGBE_DCB */
4957 #endif /* IXGBE_FCOE */
4958 break;
4959 case ixgbe_mac_82599EB:
4960 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4961 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4962 break;
4963 case ixgbe_mac_X540:
4964 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
4965 if (fwsm & IXGBE_FWSM_TS_ENABLED)
4966 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4967 break;
4968 default:
4969 break;
4970 }
4971
4972 #ifdef IXGBE_FCOE
4973 /* FCoE support exists, always init the FCoE lock */
4974 spin_lock_init(&adapter->fcoe.lock);
4975
4976 #endif
4977 /* n-tuple support exists, always init our spinlock */
4978 spin_lock_init(&adapter->fdir_perfect_lock);
4979
4980 #ifdef CONFIG_IXGBE_DCB
4981 switch (hw->mac.type) {
4982 case ixgbe_mac_X540:
4983 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
4984 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
4985 break;
4986 default:
4987 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
4988 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
4989 break;
4990 }
4991
4992 /* Configure DCB traffic classes */
4993 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4994 tc = &adapter->dcb_cfg.tc_config[j];
4995 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4996 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4997 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4998 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4999 tc->dcb_pfc = pfc_disabled;
5000 }
5001
5002 /* Initialize default user to priority mapping, UPx->TC0 */
5003 tc = &adapter->dcb_cfg.tc_config[0];
5004 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5005 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5006
5007 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5008 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5009 adapter->dcb_cfg.pfc_mode_enable = false;
5010 adapter->dcb_set_bitmap = 0x00;
5011 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5012 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
5013 sizeof(adapter->temp_dcb_cfg));
5014
5015 #endif
5016
5017 /* default flow control settings */
5018 hw->fc.requested_mode = ixgbe_fc_full;
5019 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5020 ixgbe_pbthresh_setup(adapter);
5021 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5022 hw->fc.send_xon = true;
5023 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
5024
5025 #ifdef CONFIG_PCI_IOV
5026 if (max_vfs > 0)
5027 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
5028
5029 /* assign number of SR-IOV VFs */
5030 if (hw->mac.type != ixgbe_mac_82598EB) {
5031 if (max_vfs > 63) {
5032 adapter->num_vfs = 0;
5033 e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
5034 } else {
5035 adapter->num_vfs = max_vfs;
5036 }
5037 }
5038 #endif /* CONFIG_PCI_IOV */
5039
5040 /* enable itr by default in dynamic mode */
5041 adapter->rx_itr_setting = 1;
5042 adapter->tx_itr_setting = 1;
5043
5044 /* set default ring sizes */
5045 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5046 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5047
5048 /* set default work limits */
5049 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5050
5051 /* initialize eeprom parameters */
5052 if (ixgbe_init_eeprom_params_generic(hw)) {
5053 e_dev_err("EEPROM initialization failed\n");
5054 return -EIO;
5055 }
5056
5057 /* PF holds first pool slot */
5058 set_bit(0, &adapter->fwd_bitmask);
5059 set_bit(__IXGBE_DOWN, &adapter->state);
5060
5061 return 0;
5062 }
5063
5064 /**
5065 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5066 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5067 *
5068 * Return 0 on success, negative on failure
5069 **/
5070 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5071 {
5072 struct device *dev = tx_ring->dev;
5073 int orig_node = dev_to_node(dev);
5074 int numa_node = -1;
5075 int size;
5076
5077 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5078
5079 if (tx_ring->q_vector)
5080 numa_node = tx_ring->q_vector->numa_node;
5081
5082 tx_ring->tx_buffer_info = vzalloc_node(size, numa_node);
5083 if (!tx_ring->tx_buffer_info)
5084 tx_ring->tx_buffer_info = vzalloc(size);
5085 if (!tx_ring->tx_buffer_info)
5086 goto err;
5087
5088 u64_stats_init(&tx_ring->syncp);
5089
5090 /* round up to nearest 4K */
5091 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5092 tx_ring->size = ALIGN(tx_ring->size, 4096);
5093
5094 set_dev_node(dev, numa_node);
5095 tx_ring->desc = dma_alloc_coherent(dev,
5096 tx_ring->size,
5097 &tx_ring->dma,
5098 GFP_KERNEL);
5099 set_dev_node(dev, orig_node);
5100 if (!tx_ring->desc)
5101 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5102 &tx_ring->dma, GFP_KERNEL);
5103 if (!tx_ring->desc)
5104 goto err;
5105
5106 tx_ring->next_to_use = 0;
5107 tx_ring->next_to_clean = 0;
5108 return 0;
5109
5110 err:
5111 vfree(tx_ring->tx_buffer_info);
5112 tx_ring->tx_buffer_info = NULL;
5113 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5114 return -ENOMEM;
5115 }
5116
5117 /**
5118 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5119 * @adapter: board private structure
5120 *
5121 * If this function returns with an error, then it's possible one or
5122 * more of the rings is populated (while the rest are not). It is the
5123 * callers duty to clean those orphaned rings.
5124 *
5125 * Return 0 on success, negative on failure
5126 **/
5127 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5128 {
5129 int i, err = 0;
5130
5131 for (i = 0; i < adapter->num_tx_queues; i++) {
5132 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5133 if (!err)
5134 continue;
5135
5136 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5137 goto err_setup_tx;
5138 }
5139
5140 return 0;
5141 err_setup_tx:
5142 /* rewind the index freeing the rings as we go */
5143 while (i--)
5144 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5145 return err;
5146 }
5147
5148 /**
5149 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5150 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5151 *
5152 * Returns 0 on success, negative on failure
5153 **/
5154 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5155 {
5156 struct device *dev = rx_ring->dev;
5157 int orig_node = dev_to_node(dev);
5158 int numa_node = -1;
5159 int size;
5160
5161 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5162
5163 if (rx_ring->q_vector)
5164 numa_node = rx_ring->q_vector->numa_node;
5165
5166 rx_ring->rx_buffer_info = vzalloc_node(size, numa_node);
5167 if (!rx_ring->rx_buffer_info)
5168 rx_ring->rx_buffer_info = vzalloc(size);
5169 if (!rx_ring->rx_buffer_info)
5170 goto err;
5171
5172 u64_stats_init(&rx_ring->syncp);
5173
5174 /* Round up to nearest 4K */
5175 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5176 rx_ring->size = ALIGN(rx_ring->size, 4096);
5177
5178 set_dev_node(dev, numa_node);
5179 rx_ring->desc = dma_alloc_coherent(dev,
5180 rx_ring->size,
5181 &rx_ring->dma,
5182 GFP_KERNEL);
5183 set_dev_node(dev, orig_node);
5184 if (!rx_ring->desc)
5185 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5186 &rx_ring->dma, GFP_KERNEL);
5187 if (!rx_ring->desc)
5188 goto err;
5189
5190 rx_ring->next_to_clean = 0;
5191 rx_ring->next_to_use = 0;
5192
5193 return 0;
5194 err:
5195 vfree(rx_ring->rx_buffer_info);
5196 rx_ring->rx_buffer_info = NULL;
5197 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5198 return -ENOMEM;
5199 }
5200
5201 /**
5202 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5203 * @adapter: board private structure
5204 *
5205 * If this function returns with an error, then it's possible one or
5206 * more of the rings is populated (while the rest are not). It is the
5207 * callers duty to clean those orphaned rings.
5208 *
5209 * Return 0 on success, negative on failure
5210 **/
5211 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5212 {
5213 int i, err = 0;
5214
5215 for (i = 0; i < adapter->num_rx_queues; i++) {
5216 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5217 if (!err)
5218 continue;
5219
5220 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5221 goto err_setup_rx;
5222 }
5223
5224 #ifdef IXGBE_FCOE
5225 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5226 if (!err)
5227 #endif
5228 return 0;
5229 err_setup_rx:
5230 /* rewind the index freeing the rings as we go */
5231 while (i--)
5232 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5233 return err;
5234 }
5235
5236 /**
5237 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5238 * @tx_ring: Tx descriptor ring for a specific queue
5239 *
5240 * Free all transmit software resources
5241 **/
5242 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5243 {
5244 ixgbe_clean_tx_ring(tx_ring);
5245
5246 vfree(tx_ring->tx_buffer_info);
5247 tx_ring->tx_buffer_info = NULL;
5248
5249 /* if not set, then don't free */
5250 if (!tx_ring->desc)
5251 return;
5252
5253 dma_free_coherent(tx_ring->dev, tx_ring->size,
5254 tx_ring->desc, tx_ring->dma);
5255
5256 tx_ring->desc = NULL;
5257 }
5258
5259 /**
5260 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5261 * @adapter: board private structure
5262 *
5263 * Free all transmit software resources
5264 **/
5265 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5266 {
5267 int i;
5268
5269 for (i = 0; i < adapter->num_tx_queues; i++)
5270 if (adapter->tx_ring[i]->desc)
5271 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5272 }
5273
5274 /**
5275 * ixgbe_free_rx_resources - Free Rx Resources
5276 * @rx_ring: ring to clean the resources from
5277 *
5278 * Free all receive software resources
5279 **/
5280 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5281 {
5282 ixgbe_clean_rx_ring(rx_ring);
5283
5284 vfree(rx_ring->rx_buffer_info);
5285 rx_ring->rx_buffer_info = NULL;
5286
5287 /* if not set, then don't free */
5288 if (!rx_ring->desc)
5289 return;
5290
5291 dma_free_coherent(rx_ring->dev, rx_ring->size,
5292 rx_ring->desc, rx_ring->dma);
5293
5294 rx_ring->desc = NULL;
5295 }
5296
5297 /**
5298 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5299 * @adapter: board private structure
5300 *
5301 * Free all receive software resources
5302 **/
5303 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5304 {
5305 int i;
5306
5307 #ifdef IXGBE_FCOE
5308 ixgbe_free_fcoe_ddp_resources(adapter);
5309
5310 #endif
5311 for (i = 0; i < adapter->num_rx_queues; i++)
5312 if (adapter->rx_ring[i]->desc)
5313 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5314 }
5315
5316 /**
5317 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5318 * @netdev: network interface device structure
5319 * @new_mtu: new value for maximum frame size
5320 *
5321 * Returns 0 on success, negative on failure
5322 **/
5323 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5324 {
5325 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5326 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5327
5328 /* MTU < 68 is an error and causes problems on some kernels */
5329 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5330 return -EINVAL;
5331
5332 /*
5333 * For 82599EB we cannot allow legacy VFs to enable their receive
5334 * paths when MTU greater than 1500 is configured. So display a
5335 * warning that legacy VFs will be disabled.
5336 */
5337 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
5338 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
5339 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
5340 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
5341
5342 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5343
5344 /* must set new MTU before calling down or up */
5345 netdev->mtu = new_mtu;
5346
5347 if (netif_running(netdev))
5348 ixgbe_reinit_locked(adapter);
5349
5350 return 0;
5351 }
5352
5353 /**
5354 * ixgbe_open - Called when a network interface is made active
5355 * @netdev: network interface device structure
5356 *
5357 * Returns 0 on success, negative value on failure
5358 *
5359 * The open entry point is called when a network interface is made
5360 * active by the system (IFF_UP). At this point all resources needed
5361 * for transmit and receive operations are allocated, the interrupt
5362 * handler is registered with the OS, the watchdog timer is started,
5363 * and the stack is notified that the interface is ready.
5364 **/
5365 static int ixgbe_open(struct net_device *netdev)
5366 {
5367 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5368 int err, queues;
5369
5370 /* disallow open during test */
5371 if (test_bit(__IXGBE_TESTING, &adapter->state))
5372 return -EBUSY;
5373
5374 netif_carrier_off(netdev);
5375
5376 /* allocate transmit descriptors */
5377 err = ixgbe_setup_all_tx_resources(adapter);
5378 if (err)
5379 goto err_setup_tx;
5380
5381 /* allocate receive descriptors */
5382 err = ixgbe_setup_all_rx_resources(adapter);
5383 if (err)
5384 goto err_setup_rx;
5385
5386 ixgbe_configure(adapter);
5387
5388 err = ixgbe_request_irq(adapter);
5389 if (err)
5390 goto err_req_irq;
5391
5392 /* Notify the stack of the actual queue counts. */
5393 if (adapter->num_rx_pools > 1)
5394 queues = adapter->num_rx_queues_per_pool;
5395 else
5396 queues = adapter->num_tx_queues;
5397
5398 err = netif_set_real_num_tx_queues(netdev, queues);
5399 if (err)
5400 goto err_set_queues;
5401
5402 if (adapter->num_rx_pools > 1 &&
5403 adapter->num_rx_queues > IXGBE_MAX_L2A_QUEUES)
5404 queues = IXGBE_MAX_L2A_QUEUES;
5405 else
5406 queues = adapter->num_rx_queues;
5407 err = netif_set_real_num_rx_queues(netdev, queues);
5408 if (err)
5409 goto err_set_queues;
5410
5411 ixgbe_ptp_init(adapter);
5412
5413 ixgbe_up_complete(adapter);
5414
5415 return 0;
5416
5417 err_set_queues:
5418 ixgbe_free_irq(adapter);
5419 err_req_irq:
5420 ixgbe_free_all_rx_resources(adapter);
5421 err_setup_rx:
5422 ixgbe_free_all_tx_resources(adapter);
5423 err_setup_tx:
5424 ixgbe_reset(adapter);
5425
5426 return err;
5427 }
5428
5429 /**
5430 * ixgbe_close - Disables a network interface
5431 * @netdev: network interface device structure
5432 *
5433 * Returns 0, this is not allowed to fail
5434 *
5435 * The close entry point is called when an interface is de-activated
5436 * by the OS. The hardware is still under the drivers control, but
5437 * needs to be disabled. A global MAC reset is issued to stop the
5438 * hardware, and all transmit and receive resources are freed.
5439 **/
5440 static int ixgbe_close(struct net_device *netdev)
5441 {
5442 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5443
5444 ixgbe_ptp_stop(adapter);
5445
5446 ixgbe_down(adapter);
5447 ixgbe_free_irq(adapter);
5448
5449 ixgbe_fdir_filter_exit(adapter);
5450
5451 ixgbe_free_all_tx_resources(adapter);
5452 ixgbe_free_all_rx_resources(adapter);
5453
5454 ixgbe_release_hw_control(adapter);
5455
5456 return 0;
5457 }
5458
5459 #ifdef CONFIG_PM
5460 static int ixgbe_resume(struct pci_dev *pdev)
5461 {
5462 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5463 struct net_device *netdev = adapter->netdev;
5464 u32 err;
5465
5466 pci_set_power_state(pdev, PCI_D0);
5467 pci_restore_state(pdev);
5468 /*
5469 * pci_restore_state clears dev->state_saved so call
5470 * pci_save_state to restore it.
5471 */
5472 pci_save_state(pdev);
5473
5474 err = pci_enable_device_mem(pdev);
5475 if (err) {
5476 e_dev_err("Cannot enable PCI device from suspend\n");
5477 return err;
5478 }
5479 pci_set_master(pdev);
5480
5481 pci_wake_from_d3(pdev, false);
5482
5483 ixgbe_reset(adapter);
5484
5485 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5486
5487 rtnl_lock();
5488 err = ixgbe_init_interrupt_scheme(adapter);
5489 if (!err && netif_running(netdev))
5490 err = ixgbe_open(netdev);
5491
5492 rtnl_unlock();
5493
5494 if (err)
5495 return err;
5496
5497 netif_device_attach(netdev);
5498
5499 return 0;
5500 }
5501 #endif /* CONFIG_PM */
5502
5503 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5504 {
5505 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5506 struct net_device *netdev = adapter->netdev;
5507 struct ixgbe_hw *hw = &adapter->hw;
5508 u32 ctrl, fctrl;
5509 u32 wufc = adapter->wol;
5510 #ifdef CONFIG_PM
5511 int retval = 0;
5512 #endif
5513
5514 netif_device_detach(netdev);
5515
5516 rtnl_lock();
5517 if (netif_running(netdev)) {
5518 ixgbe_down(adapter);
5519 ixgbe_free_irq(adapter);
5520 ixgbe_free_all_tx_resources(adapter);
5521 ixgbe_free_all_rx_resources(adapter);
5522 }
5523 rtnl_unlock();
5524
5525 ixgbe_clear_interrupt_scheme(adapter);
5526
5527 #ifdef CONFIG_PM
5528 retval = pci_save_state(pdev);
5529 if (retval)
5530 return retval;
5531
5532 #endif
5533 if (hw->mac.ops.stop_link_on_d3)
5534 hw->mac.ops.stop_link_on_d3(hw);
5535
5536 if (wufc) {
5537 ixgbe_set_rx_mode(netdev);
5538
5539 /* enable the optics for 82599 SFP+ fiber as we can WoL */
5540 if (hw->mac.ops.enable_tx_laser)
5541 hw->mac.ops.enable_tx_laser(hw);
5542
5543 /* turn on all-multi mode if wake on multicast is enabled */
5544 if (wufc & IXGBE_WUFC_MC) {
5545 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5546 fctrl |= IXGBE_FCTRL_MPE;
5547 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5548 }
5549
5550 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5551 ctrl |= IXGBE_CTRL_GIO_DIS;
5552 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5553
5554 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5555 } else {
5556 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5557 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5558 }
5559
5560 switch (hw->mac.type) {
5561 case ixgbe_mac_82598EB:
5562 pci_wake_from_d3(pdev, false);
5563 break;
5564 case ixgbe_mac_82599EB:
5565 case ixgbe_mac_X540:
5566 pci_wake_from_d3(pdev, !!wufc);
5567 break;
5568 default:
5569 break;
5570 }
5571
5572 *enable_wake = !!wufc;
5573
5574 ixgbe_release_hw_control(adapter);
5575
5576 pci_disable_device(pdev);
5577
5578 return 0;
5579 }
5580
5581 #ifdef CONFIG_PM
5582 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5583 {
5584 int retval;
5585 bool wake;
5586
5587 retval = __ixgbe_shutdown(pdev, &wake);
5588 if (retval)
5589 return retval;
5590
5591 if (wake) {
5592 pci_prepare_to_sleep(pdev);
5593 } else {
5594 pci_wake_from_d3(pdev, false);
5595 pci_set_power_state(pdev, PCI_D3hot);
5596 }
5597
5598 return 0;
5599 }
5600 #endif /* CONFIG_PM */
5601
5602 static void ixgbe_shutdown(struct pci_dev *pdev)
5603 {
5604 bool wake;
5605
5606 __ixgbe_shutdown(pdev, &wake);
5607
5608 if (system_state == SYSTEM_POWER_OFF) {
5609 pci_wake_from_d3(pdev, wake);
5610 pci_set_power_state(pdev, PCI_D3hot);
5611 }
5612 }
5613
5614 /**
5615 * ixgbe_update_stats - Update the board statistics counters.
5616 * @adapter: board private structure
5617 **/
5618 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5619 {
5620 struct net_device *netdev = adapter->netdev;
5621 struct ixgbe_hw *hw = &adapter->hw;
5622 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5623 u64 total_mpc = 0;
5624 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5625 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5626 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5627 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
5628
5629 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5630 test_bit(__IXGBE_RESETTING, &adapter->state))
5631 return;
5632
5633 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5634 u64 rsc_count = 0;
5635 u64 rsc_flush = 0;
5636 for (i = 0; i < adapter->num_rx_queues; i++) {
5637 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5638 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5639 }
5640 adapter->rsc_total_count = rsc_count;
5641 adapter->rsc_total_flush = rsc_flush;
5642 }
5643
5644 for (i = 0; i < adapter->num_rx_queues; i++) {
5645 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5646 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5647 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5648 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5649 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
5650 bytes += rx_ring->stats.bytes;
5651 packets += rx_ring->stats.packets;
5652 }
5653 adapter->non_eop_descs = non_eop_descs;
5654 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5655 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5656 adapter->hw_csum_rx_error = hw_csum_rx_error;
5657 netdev->stats.rx_bytes = bytes;
5658 netdev->stats.rx_packets = packets;
5659
5660 bytes = 0;
5661 packets = 0;
5662 /* gather some stats to the adapter struct that are per queue */
5663 for (i = 0; i < adapter->num_tx_queues; i++) {
5664 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5665 restart_queue += tx_ring->tx_stats.restart_queue;
5666 tx_busy += tx_ring->tx_stats.tx_busy;
5667 bytes += tx_ring->stats.bytes;
5668 packets += tx_ring->stats.packets;
5669 }
5670 adapter->restart_queue = restart_queue;
5671 adapter->tx_busy = tx_busy;
5672 netdev->stats.tx_bytes = bytes;
5673 netdev->stats.tx_packets = packets;
5674
5675 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5676
5677 /* 8 register reads */
5678 for (i = 0; i < 8; i++) {
5679 /* for packet buffers not used, the register should read 0 */
5680 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5681 missed_rx += mpc;
5682 hwstats->mpc[i] += mpc;
5683 total_mpc += hwstats->mpc[i];
5684 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5685 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5686 switch (hw->mac.type) {
5687 case ixgbe_mac_82598EB:
5688 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5689 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5690 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5691 hwstats->pxonrxc[i] +=
5692 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5693 break;
5694 case ixgbe_mac_82599EB:
5695 case ixgbe_mac_X540:
5696 hwstats->pxonrxc[i] +=
5697 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5698 break;
5699 default:
5700 break;
5701 }
5702 }
5703
5704 /*16 register reads */
5705 for (i = 0; i < 16; i++) {
5706 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5707 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5708 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5709 (hw->mac.type == ixgbe_mac_X540)) {
5710 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5711 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5712 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5713 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5714 }
5715 }
5716
5717 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5718 /* work around hardware counting issue */
5719 hwstats->gprc -= missed_rx;
5720
5721 ixgbe_update_xoff_received(adapter);
5722
5723 /* 82598 hardware only has a 32 bit counter in the high register */
5724 switch (hw->mac.type) {
5725 case ixgbe_mac_82598EB:
5726 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5727 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5728 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5729 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5730 break;
5731 case ixgbe_mac_X540:
5732 /* OS2BMC stats are X540 only*/
5733 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5734 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5735 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5736 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5737 case ixgbe_mac_82599EB:
5738 for (i = 0; i < 16; i++)
5739 adapter->hw_rx_no_dma_resources +=
5740 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5741 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5742 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5743 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5744 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5745 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5746 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5747 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5748 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5749 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5750 #ifdef IXGBE_FCOE
5751 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5752 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5753 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5754 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5755 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5756 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5757 /* Add up per cpu counters for total ddp aloc fail */
5758 if (adapter->fcoe.ddp_pool) {
5759 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5760 struct ixgbe_fcoe_ddp_pool *ddp_pool;
5761 unsigned int cpu;
5762 u64 noddp = 0, noddp_ext_buff = 0;
5763 for_each_possible_cpu(cpu) {
5764 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
5765 noddp += ddp_pool->noddp;
5766 noddp_ext_buff += ddp_pool->noddp_ext_buff;
5767 }
5768 hwstats->fcoe_noddp = noddp;
5769 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
5770 }
5771 #endif /* IXGBE_FCOE */
5772 break;
5773 default:
5774 break;
5775 }
5776 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5777 hwstats->bprc += bprc;
5778 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5779 if (hw->mac.type == ixgbe_mac_82598EB)
5780 hwstats->mprc -= bprc;
5781 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5782 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5783 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5784 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5785 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5786 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5787 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5788 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5789 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5790 hwstats->lxontxc += lxon;
5791 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5792 hwstats->lxofftxc += lxoff;
5793 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5794 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5795 /*
5796 * 82598 errata - tx of flow control packets is included in tx counters
5797 */
5798 xon_off_tot = lxon + lxoff;
5799 hwstats->gptc -= xon_off_tot;
5800 hwstats->mptc -= xon_off_tot;
5801 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5802 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5803 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5804 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5805 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5806 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5807 hwstats->ptc64 -= xon_off_tot;
5808 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5809 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5810 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5811 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5812 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5813 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5814
5815 /* Fill out the OS statistics structure */
5816 netdev->stats.multicast = hwstats->mprc;
5817
5818 /* Rx Errors */
5819 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5820 netdev->stats.rx_dropped = 0;
5821 netdev->stats.rx_length_errors = hwstats->rlec;
5822 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5823 netdev->stats.rx_missed_errors = total_mpc;
5824 }
5825
5826 /**
5827 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5828 * @adapter: pointer to the device adapter structure
5829 **/
5830 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5831 {
5832 struct ixgbe_hw *hw = &adapter->hw;
5833 int i;
5834
5835 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5836 return;
5837
5838 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5839
5840 /* if interface is down do nothing */
5841 if (test_bit(__IXGBE_DOWN, &adapter->state))
5842 return;
5843
5844 /* do nothing if we are not using signature filters */
5845 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5846 return;
5847
5848 adapter->fdir_overflow++;
5849
5850 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5851 for (i = 0; i < adapter->num_tx_queues; i++)
5852 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5853 &(adapter->tx_ring[i]->state));
5854 /* re-enable flow director interrupts */
5855 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5856 } else {
5857 e_err(probe, "failed to finish FDIR re-initialization, "
5858 "ignored adding FDIR ATR filters\n");
5859 }
5860 }
5861
5862 /**
5863 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5864 * @adapter: pointer to the device adapter structure
5865 *
5866 * This function serves two purposes. First it strobes the interrupt lines
5867 * in order to make certain interrupts are occurring. Secondly it sets the
5868 * bits needed to check for TX hangs. As a result we should immediately
5869 * determine if a hang has occurred.
5870 */
5871 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5872 {
5873 struct ixgbe_hw *hw = &adapter->hw;
5874 u64 eics = 0;
5875 int i;
5876
5877 /* If we're down or resetting, just bail */
5878 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5879 test_bit(__IXGBE_RESETTING, &adapter->state))
5880 return;
5881
5882 /* Force detection of hung controller */
5883 if (netif_carrier_ok(adapter->netdev)) {
5884 for (i = 0; i < adapter->num_tx_queues; i++)
5885 set_check_for_tx_hang(adapter->tx_ring[i]);
5886 }
5887
5888 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5889 /*
5890 * for legacy and MSI interrupts don't set any bits
5891 * that are enabled for EIAM, because this operation
5892 * would set *both* EIMS and EICS for any bit in EIAM
5893 */
5894 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5895 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5896 } else {
5897 /* get one bit for every active tx/rx interrupt vector */
5898 for (i = 0; i < adapter->num_q_vectors; i++) {
5899 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5900 if (qv->rx.ring || qv->tx.ring)
5901 eics |= ((u64)1 << i);
5902 }
5903 }
5904
5905 /* Cause software interrupt to ensure rings are cleaned */
5906 ixgbe_irq_rearm_queues(adapter, eics);
5907
5908 }
5909
5910 /**
5911 * ixgbe_watchdog_update_link - update the link status
5912 * @adapter: pointer to the device adapter structure
5913 * @link_speed: pointer to a u32 to store the link_speed
5914 **/
5915 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5916 {
5917 struct ixgbe_hw *hw = &adapter->hw;
5918 u32 link_speed = adapter->link_speed;
5919 bool link_up = adapter->link_up;
5920 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
5921
5922 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5923 return;
5924
5925 if (hw->mac.ops.check_link) {
5926 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5927 } else {
5928 /* always assume link is up, if no check link function */
5929 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5930 link_up = true;
5931 }
5932
5933 if (adapter->ixgbe_ieee_pfc)
5934 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
5935
5936 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
5937 hw->mac.ops.fc_enable(hw);
5938 ixgbe_set_rx_drop_en(adapter);
5939 }
5940
5941 if (link_up ||
5942 time_after(jiffies, (adapter->link_check_timeout +
5943 IXGBE_TRY_LINK_TIMEOUT))) {
5944 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5945 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5946 IXGBE_WRITE_FLUSH(hw);
5947 }
5948
5949 adapter->link_up = link_up;
5950 adapter->link_speed = link_speed;
5951 }
5952
5953 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
5954 {
5955 #ifdef CONFIG_IXGBE_DCB
5956 struct net_device *netdev = adapter->netdev;
5957 struct dcb_app app = {
5958 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
5959 .protocol = 0,
5960 };
5961 u8 up = 0;
5962
5963 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
5964 up = dcb_ieee_getapp_mask(netdev, &app);
5965
5966 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
5967 #endif
5968 }
5969
5970 /**
5971 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5972 * print link up message
5973 * @adapter: pointer to the device adapter structure
5974 **/
5975 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5976 {
5977 struct net_device *netdev = adapter->netdev;
5978 struct ixgbe_hw *hw = &adapter->hw;
5979 u32 link_speed = adapter->link_speed;
5980 bool flow_rx, flow_tx;
5981
5982 /* only continue if link was previously down */
5983 if (netif_carrier_ok(netdev))
5984 return;
5985
5986 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5987
5988 switch (hw->mac.type) {
5989 case ixgbe_mac_82598EB: {
5990 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5991 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5992 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5993 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5994 }
5995 break;
5996 case ixgbe_mac_X540:
5997 case ixgbe_mac_82599EB: {
5998 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5999 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6000 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6001 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6002 }
6003 break;
6004 default:
6005 flow_tx = false;
6006 flow_rx = false;
6007 break;
6008 }
6009
6010 adapter->last_rx_ptp_check = jiffies;
6011
6012 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6013 ixgbe_ptp_start_cyclecounter(adapter);
6014
6015 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
6016 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
6017 "10 Gbps" :
6018 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
6019 "1 Gbps" :
6020 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
6021 "100 Mbps" :
6022 "unknown speed"))),
6023 ((flow_rx && flow_tx) ? "RX/TX" :
6024 (flow_rx ? "RX" :
6025 (flow_tx ? "TX" : "None"))));
6026
6027 netif_carrier_on(netdev);
6028 ixgbe_check_vf_rate_limit(adapter);
6029
6030 /* update the default user priority for VFs */
6031 ixgbe_update_default_up(adapter);
6032
6033 /* ping all the active vfs to let them know link has changed */
6034 ixgbe_ping_all_vfs(adapter);
6035 }
6036
6037 /**
6038 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6039 * print link down message
6040 * @adapter: pointer to the adapter structure
6041 **/
6042 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
6043 {
6044 struct net_device *netdev = adapter->netdev;
6045 struct ixgbe_hw *hw = &adapter->hw;
6046
6047 adapter->link_up = false;
6048 adapter->link_speed = 0;
6049
6050 /* only continue if link was up previously */
6051 if (!netif_carrier_ok(netdev))
6052 return;
6053
6054 /* poll for SFP+ cable when link is down */
6055 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6056 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6057
6058 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6059 ixgbe_ptp_start_cyclecounter(adapter);
6060
6061 e_info(drv, "NIC Link is Down\n");
6062 netif_carrier_off(netdev);
6063
6064 /* ping all the active vfs to let them know link has changed */
6065 ixgbe_ping_all_vfs(adapter);
6066 }
6067
6068 /**
6069 * ixgbe_watchdog_flush_tx - flush queues on link down
6070 * @adapter: pointer to the device adapter structure
6071 **/
6072 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6073 {
6074 int i;
6075 int some_tx_pending = 0;
6076
6077 if (!netif_carrier_ok(adapter->netdev)) {
6078 for (i = 0; i < adapter->num_tx_queues; i++) {
6079 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6080 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
6081 some_tx_pending = 1;
6082 break;
6083 }
6084 }
6085
6086 if (some_tx_pending) {
6087 /* We've lost link, so the controller stops DMA,
6088 * but we've got queued Tx work that's never going
6089 * to get done, so reset controller to flush Tx.
6090 * (Do the reset outside of interrupt context).
6091 */
6092 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
6093 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6094 }
6095 }
6096 }
6097
6098 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6099 {
6100 u32 ssvpc;
6101
6102 /* Do not perform spoof check for 82598 or if not in IOV mode */
6103 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
6104 adapter->num_vfs == 0)
6105 return;
6106
6107 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6108
6109 /*
6110 * ssvpc register is cleared on read, if zero then no
6111 * spoofed packets in the last interval.
6112 */
6113 if (!ssvpc)
6114 return;
6115
6116 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
6117 }
6118
6119 /**
6120 * ixgbe_watchdog_subtask - check and bring link up
6121 * @adapter: pointer to the device adapter structure
6122 **/
6123 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6124 {
6125 /* if interface is down do nothing */
6126 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6127 test_bit(__IXGBE_RESETTING, &adapter->state))
6128 return;
6129
6130 ixgbe_watchdog_update_link(adapter);
6131
6132 if (adapter->link_up)
6133 ixgbe_watchdog_link_is_up(adapter);
6134 else
6135 ixgbe_watchdog_link_is_down(adapter);
6136
6137 ixgbe_spoof_check(adapter);
6138 ixgbe_update_stats(adapter);
6139
6140 ixgbe_watchdog_flush_tx(adapter);
6141 }
6142
6143 /**
6144 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6145 * @adapter: the ixgbe adapter structure
6146 **/
6147 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6148 {
6149 struct ixgbe_hw *hw = &adapter->hw;
6150 s32 err;
6151
6152 /* not searching for SFP so there is nothing to do here */
6153 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6154 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6155 return;
6156
6157 /* someone else is in init, wait until next service event */
6158 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6159 return;
6160
6161 err = hw->phy.ops.identify_sfp(hw);
6162 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6163 goto sfp_out;
6164
6165 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6166 /* If no cable is present, then we need to reset
6167 * the next time we find a good cable. */
6168 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6169 }
6170
6171 /* exit on error */
6172 if (err)
6173 goto sfp_out;
6174
6175 /* exit if reset not needed */
6176 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6177 goto sfp_out;
6178
6179 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6180
6181 /*
6182 * A module may be identified correctly, but the EEPROM may not have
6183 * support for that module. setup_sfp() will fail in that case, so
6184 * we should not allow that module to load.
6185 */
6186 if (hw->mac.type == ixgbe_mac_82598EB)
6187 err = hw->phy.ops.reset(hw);
6188 else
6189 err = hw->mac.ops.setup_sfp(hw);
6190
6191 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6192 goto sfp_out;
6193
6194 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6195 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6196
6197 sfp_out:
6198 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6199
6200 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6201 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6202 e_dev_err("failed to initialize because an unsupported "
6203 "SFP+ module type was detected.\n");
6204 e_dev_err("Reload the driver after installing a "
6205 "supported module.\n");
6206 unregister_netdev(adapter->netdev);
6207 }
6208 }
6209
6210 /**
6211 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6212 * @adapter: the ixgbe adapter structure
6213 **/
6214 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6215 {
6216 struct ixgbe_hw *hw = &adapter->hw;
6217 u32 speed;
6218 bool autoneg = false;
6219
6220 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6221 return;
6222
6223 /* someone else is in init, wait until next service event */
6224 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6225 return;
6226
6227 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6228
6229 speed = hw->phy.autoneg_advertised;
6230 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
6231 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
6232
6233 /* setup the highest link when no autoneg */
6234 if (!autoneg) {
6235 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
6236 speed = IXGBE_LINK_SPEED_10GB_FULL;
6237 }
6238 }
6239
6240 if (hw->mac.ops.setup_link)
6241 hw->mac.ops.setup_link(hw, speed, true);
6242
6243 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6244 adapter->link_check_timeout = jiffies;
6245 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6246 }
6247
6248 #ifdef CONFIG_PCI_IOV
6249 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6250 {
6251 int vf;
6252 struct ixgbe_hw *hw = &adapter->hw;
6253 struct net_device *netdev = adapter->netdev;
6254 u32 gpc;
6255 u32 ciaa, ciad;
6256
6257 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6258 if (gpc) /* If incrementing then no need for the check below */
6259 return;
6260 /*
6261 * Check to see if a bad DMA write target from an errant or
6262 * malicious VF has caused a PCIe error. If so then we can
6263 * issue a VFLR to the offending VF(s) and then resume without
6264 * requesting a full slot reset.
6265 */
6266
6267 for (vf = 0; vf < adapter->num_vfs; vf++) {
6268 ciaa = (vf << 16) | 0x80000000;
6269 /* 32 bit read so align, we really want status at offset 6 */
6270 ciaa |= PCI_COMMAND;
6271 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6272 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
6273 ciaa &= 0x7FFFFFFF;
6274 /* disable debug mode asap after reading data */
6275 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6276 /* Get the upper 16 bits which will be the PCI status reg */
6277 ciad >>= 16;
6278 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
6279 netdev_err(netdev, "VF %d Hung DMA\n", vf);
6280 /* Issue VFLR */
6281 ciaa = (vf << 16) | 0x80000000;
6282 ciaa |= 0xA8;
6283 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6284 ciad = 0x00008000; /* VFLR */
6285 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
6286 ciaa &= 0x7FFFFFFF;
6287 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6288 }
6289 }
6290 }
6291
6292 #endif
6293 /**
6294 * ixgbe_service_timer - Timer Call-back
6295 * @data: pointer to adapter cast into an unsigned long
6296 **/
6297 static void ixgbe_service_timer(unsigned long data)
6298 {
6299 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6300 unsigned long next_event_offset;
6301 bool ready = true;
6302
6303 /* poll faster when waiting for link */
6304 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6305 next_event_offset = HZ / 10;
6306 else
6307 next_event_offset = HZ * 2;
6308
6309 #ifdef CONFIG_PCI_IOV
6310 /*
6311 * don't bother with SR-IOV VF DMA hang check if there are
6312 * no VFs or the link is down
6313 */
6314 if (!adapter->num_vfs ||
6315 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6316 goto normal_timer_service;
6317
6318 /* If we have VFs allocated then we must check for DMA hangs */
6319 ixgbe_check_for_bad_vf(adapter);
6320 next_event_offset = HZ / 50;
6321 adapter->timer_event_accumulator++;
6322
6323 if (adapter->timer_event_accumulator >= 100)
6324 adapter->timer_event_accumulator = 0;
6325 else
6326 ready = false;
6327
6328 normal_timer_service:
6329 #endif
6330 /* Reset the timer */
6331 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6332
6333 if (ready)
6334 ixgbe_service_event_schedule(adapter);
6335 }
6336
6337 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6338 {
6339 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6340 return;
6341
6342 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6343
6344 /* If we're already down or resetting, just bail */
6345 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6346 test_bit(__IXGBE_RESETTING, &adapter->state))
6347 return;
6348
6349 ixgbe_dump(adapter);
6350 netdev_err(adapter->netdev, "Reset adapter\n");
6351 adapter->tx_timeout_count++;
6352
6353 ixgbe_reinit_locked(adapter);
6354 }
6355
6356 /**
6357 * ixgbe_service_task - manages and runs subtasks
6358 * @work: pointer to work_struct containing our data
6359 **/
6360 static void ixgbe_service_task(struct work_struct *work)
6361 {
6362 struct ixgbe_adapter *adapter = container_of(work,
6363 struct ixgbe_adapter,
6364 service_task);
6365 ixgbe_reset_subtask(adapter);
6366 ixgbe_sfp_detection_subtask(adapter);
6367 ixgbe_sfp_link_config_subtask(adapter);
6368 ixgbe_check_overtemp_subtask(adapter);
6369 ixgbe_watchdog_subtask(adapter);
6370 ixgbe_fdir_reinit_subtask(adapter);
6371 ixgbe_check_hang_subtask(adapter);
6372
6373 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
6374 ixgbe_ptp_overflow_check(adapter);
6375 ixgbe_ptp_rx_hang(adapter);
6376 }
6377
6378 ixgbe_service_event_complete(adapter);
6379 }
6380
6381 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
6382 struct ixgbe_tx_buffer *first,
6383 u8 *hdr_len)
6384 {
6385 struct sk_buff *skb = first->skb;
6386 u32 vlan_macip_lens, type_tucmd;
6387 u32 mss_l4len_idx, l4len;
6388
6389 if (skb->ip_summed != CHECKSUM_PARTIAL)
6390 return 0;
6391
6392 if (!skb_is_gso(skb))
6393 return 0;
6394
6395 if (skb_header_cloned(skb)) {
6396 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6397 if (err)
6398 return err;
6399 }
6400
6401 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6402 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6403
6404 if (first->protocol == __constant_htons(ETH_P_IP)) {
6405 struct iphdr *iph = ip_hdr(skb);
6406 iph->tot_len = 0;
6407 iph->check = 0;
6408 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6409 iph->daddr, 0,
6410 IPPROTO_TCP,
6411 0);
6412 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6413 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6414 IXGBE_TX_FLAGS_CSUM |
6415 IXGBE_TX_FLAGS_IPV4;
6416 } else if (skb_is_gso_v6(skb)) {
6417 ipv6_hdr(skb)->payload_len = 0;
6418 tcp_hdr(skb)->check =
6419 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6420 &ipv6_hdr(skb)->daddr,
6421 0, IPPROTO_TCP, 0);
6422 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6423 IXGBE_TX_FLAGS_CSUM;
6424 }
6425
6426 /* compute header lengths */
6427 l4len = tcp_hdrlen(skb);
6428 *hdr_len = skb_transport_offset(skb) + l4len;
6429
6430 /* update gso size and bytecount with header size */
6431 first->gso_segs = skb_shinfo(skb)->gso_segs;
6432 first->bytecount += (first->gso_segs - 1) * *hdr_len;
6433
6434 /* mss_l4len_id: use 0 as index for TSO */
6435 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6436 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6437
6438 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6439 vlan_macip_lens = skb_network_header_len(skb);
6440 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6441 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6442
6443 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6444 mss_l4len_idx);
6445
6446 return 1;
6447 }
6448
6449 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6450 struct ixgbe_tx_buffer *first)
6451 {
6452 struct sk_buff *skb = first->skb;
6453 u32 vlan_macip_lens = 0;
6454 u32 mss_l4len_idx = 0;
6455 u32 type_tucmd = 0;
6456
6457 if (skb->ip_summed != CHECKSUM_PARTIAL) {
6458 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6459 !(first->tx_flags & IXGBE_TX_FLAGS_CC))
6460 return;
6461 } else {
6462 u8 l4_hdr = 0;
6463 switch (first->protocol) {
6464 case __constant_htons(ETH_P_IP):
6465 vlan_macip_lens |= skb_network_header_len(skb);
6466 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6467 l4_hdr = ip_hdr(skb)->protocol;
6468 break;
6469 case __constant_htons(ETH_P_IPV6):
6470 vlan_macip_lens |= skb_network_header_len(skb);
6471 l4_hdr = ipv6_hdr(skb)->nexthdr;
6472 break;
6473 default:
6474 if (unlikely(net_ratelimit())) {
6475 dev_warn(tx_ring->dev,
6476 "partial checksum but proto=%x!\n",
6477 first->protocol);
6478 }
6479 break;
6480 }
6481
6482 switch (l4_hdr) {
6483 case IPPROTO_TCP:
6484 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6485 mss_l4len_idx = tcp_hdrlen(skb) <<
6486 IXGBE_ADVTXD_L4LEN_SHIFT;
6487 break;
6488 case IPPROTO_SCTP:
6489 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6490 mss_l4len_idx = sizeof(struct sctphdr) <<
6491 IXGBE_ADVTXD_L4LEN_SHIFT;
6492 break;
6493 case IPPROTO_UDP:
6494 mss_l4len_idx = sizeof(struct udphdr) <<
6495 IXGBE_ADVTXD_L4LEN_SHIFT;
6496 break;
6497 default:
6498 if (unlikely(net_ratelimit())) {
6499 dev_warn(tx_ring->dev,
6500 "partial checksum but l4 proto=%x!\n",
6501 l4_hdr);
6502 }
6503 break;
6504 }
6505
6506 /* update TX checksum flag */
6507 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
6508 }
6509
6510 /* vlan_macip_lens: MACLEN, VLAN tag */
6511 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6512 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6513
6514 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6515 type_tucmd, mss_l4len_idx);
6516 }
6517
6518 #define IXGBE_SET_FLAG(_input, _flag, _result) \
6519 ((_flag <= _result) ? \
6520 ((u32)(_input & _flag) * (_result / _flag)) : \
6521 ((u32)(_input & _flag) / (_flag / _result)))
6522
6523 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
6524 {
6525 /* set type for advanced descriptor with frame checksum insertion */
6526 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
6527 IXGBE_ADVTXD_DCMD_DEXT |
6528 IXGBE_ADVTXD_DCMD_IFCS;
6529
6530 /* set HW vlan bit if vlan is present */
6531 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
6532 IXGBE_ADVTXD_DCMD_VLE);
6533
6534 /* set segmentation enable bits for TSO/FSO */
6535 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
6536 IXGBE_ADVTXD_DCMD_TSE);
6537
6538 /* set timestamp bit if present */
6539 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
6540 IXGBE_ADVTXD_MAC_TSTAMP);
6541
6542 /* insert frame checksum */
6543 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
6544
6545 return cmd_type;
6546 }
6547
6548 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
6549 u32 tx_flags, unsigned int paylen)
6550 {
6551 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
6552
6553 /* enable L4 checksum for TSO and TX checksum offload */
6554 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6555 IXGBE_TX_FLAGS_CSUM,
6556 IXGBE_ADVTXD_POPTS_TXSM);
6557
6558 /* enble IPv4 checksum for TSO */
6559 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6560 IXGBE_TX_FLAGS_IPV4,
6561 IXGBE_ADVTXD_POPTS_IXSM);
6562
6563 /*
6564 * Check Context must be set if Tx switch is enabled, which it
6565 * always is for case where virtual functions are running
6566 */
6567 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6568 IXGBE_TX_FLAGS_CC,
6569 IXGBE_ADVTXD_CC);
6570
6571 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6572 }
6573
6574 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6575 IXGBE_TXD_CMD_RS)
6576
6577 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
6578 struct ixgbe_tx_buffer *first,
6579 const u8 hdr_len)
6580 {
6581 struct sk_buff *skb = first->skb;
6582 struct ixgbe_tx_buffer *tx_buffer;
6583 union ixgbe_adv_tx_desc *tx_desc;
6584 struct skb_frag_struct *frag;
6585 dma_addr_t dma;
6586 unsigned int data_len, size;
6587 u32 tx_flags = first->tx_flags;
6588 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
6589 u16 i = tx_ring->next_to_use;
6590
6591 tx_desc = IXGBE_TX_DESC(tx_ring, i);
6592
6593 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
6594
6595 size = skb_headlen(skb);
6596 data_len = skb->data_len;
6597
6598 #ifdef IXGBE_FCOE
6599 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6600 if (data_len < sizeof(struct fcoe_crc_eof)) {
6601 size -= sizeof(struct fcoe_crc_eof) - data_len;
6602 data_len = 0;
6603 } else {
6604 data_len -= sizeof(struct fcoe_crc_eof);
6605 }
6606 }
6607
6608 #endif
6609 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
6610
6611 tx_buffer = first;
6612
6613 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
6614 if (dma_mapping_error(tx_ring->dev, dma))
6615 goto dma_error;
6616
6617 /* record length, and DMA address */
6618 dma_unmap_len_set(tx_buffer, len, size);
6619 dma_unmap_addr_set(tx_buffer, dma, dma);
6620
6621 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6622
6623 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
6624 tx_desc->read.cmd_type_len =
6625 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
6626
6627 i++;
6628 tx_desc++;
6629 if (i == tx_ring->count) {
6630 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6631 i = 0;
6632 }
6633 tx_desc->read.olinfo_status = 0;
6634
6635 dma += IXGBE_MAX_DATA_PER_TXD;
6636 size -= IXGBE_MAX_DATA_PER_TXD;
6637
6638 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6639 }
6640
6641 if (likely(!data_len))
6642 break;
6643
6644 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
6645
6646 i++;
6647 tx_desc++;
6648 if (i == tx_ring->count) {
6649 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6650 i = 0;
6651 }
6652 tx_desc->read.olinfo_status = 0;
6653
6654 #ifdef IXGBE_FCOE
6655 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6656 #else
6657 size = skb_frag_size(frag);
6658 #endif
6659 data_len -= size;
6660
6661 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
6662 DMA_TO_DEVICE);
6663
6664 tx_buffer = &tx_ring->tx_buffer_info[i];
6665 }
6666
6667 /* write last descriptor with RS and EOP bits */
6668 cmd_type |= size | IXGBE_TXD_CMD;
6669 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
6670
6671 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
6672
6673 /* set the timestamp */
6674 first->time_stamp = jiffies;
6675
6676 /*
6677 * Force memory writes to complete before letting h/w know there
6678 * are new descriptors to fetch. (Only applicable for weak-ordered
6679 * memory model archs, such as IA-64).
6680 *
6681 * We also need this memory barrier to make certain all of the
6682 * status bits have been updated before next_to_watch is written.
6683 */
6684 wmb();
6685
6686 /* set next_to_watch value indicating a packet is present */
6687 first->next_to_watch = tx_desc;
6688
6689 i++;
6690 if (i == tx_ring->count)
6691 i = 0;
6692
6693 tx_ring->next_to_use = i;
6694
6695 /* notify HW of packet */
6696 writel(i, tx_ring->tail);
6697
6698 return;
6699 dma_error:
6700 dev_err(tx_ring->dev, "TX DMA map failed\n");
6701
6702 /* clear dma mappings for failed tx_buffer_info map */
6703 for (;;) {
6704 tx_buffer = &tx_ring->tx_buffer_info[i];
6705 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
6706 if (tx_buffer == first)
6707 break;
6708 if (i == 0)
6709 i = tx_ring->count;
6710 i--;
6711 }
6712
6713 tx_ring->next_to_use = i;
6714 }
6715
6716 static void ixgbe_atr(struct ixgbe_ring *ring,
6717 struct ixgbe_tx_buffer *first)
6718 {
6719 struct ixgbe_q_vector *q_vector = ring->q_vector;
6720 union ixgbe_atr_hash_dword input = { .dword = 0 };
6721 union ixgbe_atr_hash_dword common = { .dword = 0 };
6722 union {
6723 unsigned char *network;
6724 struct iphdr *ipv4;
6725 struct ipv6hdr *ipv6;
6726 } hdr;
6727 struct tcphdr *th;
6728 __be16 vlan_id;
6729
6730 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6731 if (!q_vector)
6732 return;
6733
6734 /* do nothing if sampling is disabled */
6735 if (!ring->atr_sample_rate)
6736 return;
6737
6738 ring->atr_count++;
6739
6740 /* snag network header to get L4 type and address */
6741 hdr.network = skb_network_header(first->skb);
6742
6743 /* Currently only IPv4/IPv6 with TCP is supported */
6744 if ((first->protocol != __constant_htons(ETH_P_IPV6) ||
6745 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6746 (first->protocol != __constant_htons(ETH_P_IP) ||
6747 hdr.ipv4->protocol != IPPROTO_TCP))
6748 return;
6749
6750 th = tcp_hdr(first->skb);
6751
6752 /* skip this packet since it is invalid or the socket is closing */
6753 if (!th || th->fin)
6754 return;
6755
6756 /* sample on all syn packets or once every atr sample count */
6757 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6758 return;
6759
6760 /* reset sample count */
6761 ring->atr_count = 0;
6762
6763 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6764
6765 /*
6766 * src and dst are inverted, think how the receiver sees them
6767 *
6768 * The input is broken into two sections, a non-compressed section
6769 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6770 * is XORed together and stored in the compressed dword.
6771 */
6772 input.formatted.vlan_id = vlan_id;
6773
6774 /*
6775 * since src port and flex bytes occupy the same word XOR them together
6776 * and write the value to source port portion of compressed dword
6777 */
6778 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
6779 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6780 else
6781 common.port.src ^= th->dest ^ first->protocol;
6782 common.port.dst ^= th->source;
6783
6784 if (first->protocol == __constant_htons(ETH_P_IP)) {
6785 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6786 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6787 } else {
6788 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6789 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6790 hdr.ipv6->saddr.s6_addr32[1] ^
6791 hdr.ipv6->saddr.s6_addr32[2] ^
6792 hdr.ipv6->saddr.s6_addr32[3] ^
6793 hdr.ipv6->daddr.s6_addr32[0] ^
6794 hdr.ipv6->daddr.s6_addr32[1] ^
6795 hdr.ipv6->daddr.s6_addr32[2] ^
6796 hdr.ipv6->daddr.s6_addr32[3];
6797 }
6798
6799 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6800 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6801 input, common, ring->queue_index);
6802 }
6803
6804 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6805 {
6806 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6807 /* Herbert's original patch had:
6808 * smp_mb__after_netif_stop_queue();
6809 * but since that doesn't exist yet, just open code it. */
6810 smp_mb();
6811
6812 /* We need to check again in a case another CPU has just
6813 * made room available. */
6814 if (likely(ixgbe_desc_unused(tx_ring) < size))
6815 return -EBUSY;
6816
6817 /* A reprieve! - use start_queue because it doesn't call schedule */
6818 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6819 ++tx_ring->tx_stats.restart_queue;
6820 return 0;
6821 }
6822
6823 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6824 {
6825 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6826 return 0;
6827 return __ixgbe_maybe_stop_tx(tx_ring, size);
6828 }
6829
6830 #ifdef IXGBE_FCOE
6831 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6832 {
6833 struct ixgbe_adapter *adapter;
6834 struct ixgbe_ring_feature *f;
6835 int txq;
6836
6837 /*
6838 * only execute the code below if protocol is FCoE
6839 * or FIP and we have FCoE enabled on the adapter
6840 */
6841 switch (vlan_get_protocol(skb)) {
6842 case __constant_htons(ETH_P_FCOE):
6843 case __constant_htons(ETH_P_FIP):
6844 adapter = netdev_priv(dev);
6845
6846 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6847 break;
6848 default:
6849 return __netdev_pick_tx(dev, skb);
6850 }
6851
6852 f = &adapter->ring_feature[RING_F_FCOE];
6853
6854 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6855 smp_processor_id();
6856
6857 while (txq >= f->indices)
6858 txq -= f->indices;
6859
6860 return txq + f->offset;
6861 }
6862
6863 #endif
6864 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6865 struct ixgbe_adapter *adapter,
6866 struct ixgbe_ring *tx_ring)
6867 {
6868 struct ixgbe_tx_buffer *first;
6869 int tso;
6870 u32 tx_flags = 0;
6871 unsigned short f;
6872 u16 count = TXD_USE_COUNT(skb_headlen(skb));
6873 __be16 protocol = skb->protocol;
6874 u8 hdr_len = 0;
6875
6876 /*
6877 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6878 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
6879 * + 2 desc gap to keep tail from touching head,
6880 * + 1 desc for context descriptor,
6881 * otherwise try next time
6882 */
6883 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6884 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6885
6886 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6887 tx_ring->tx_stats.tx_busy++;
6888 return NETDEV_TX_BUSY;
6889 }
6890
6891 /* record the location of the first descriptor for this packet */
6892 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6893 first->skb = skb;
6894 first->bytecount = skb->len;
6895 first->gso_segs = 1;
6896
6897 /* if we have a HW VLAN tag being added default to the HW one */
6898 if (vlan_tx_tag_present(skb)) {
6899 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6900 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6901 /* else if it is a SW VLAN check the next protocol and store the tag */
6902 } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6903 struct vlan_hdr *vhdr, _vhdr;
6904 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6905 if (!vhdr)
6906 goto out_drop;
6907
6908 protocol = vhdr->h_vlan_encapsulated_proto;
6909 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
6910 IXGBE_TX_FLAGS_VLAN_SHIFT;
6911 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6912 }
6913
6914 skb_tx_timestamp(skb);
6915
6916 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
6917 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
6918 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
6919
6920 /* schedule check for Tx timestamp */
6921 adapter->ptp_tx_skb = skb_get(skb);
6922 adapter->ptp_tx_start = jiffies;
6923 schedule_work(&adapter->ptp_tx_work);
6924 }
6925
6926 #ifdef CONFIG_PCI_IOV
6927 /*
6928 * Use the l2switch_enable flag - would be false if the DMA
6929 * Tx switch had been disabled.
6930 */
6931 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6932 tx_flags |= IXGBE_TX_FLAGS_CC;
6933
6934 #endif
6935 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
6936 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
6937 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6938 (skb->priority != TC_PRIO_CONTROL))) {
6939 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6940 tx_flags |= (skb->priority & 0x7) <<
6941 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
6942 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6943 struct vlan_ethhdr *vhdr;
6944 if (skb_header_cloned(skb) &&
6945 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6946 goto out_drop;
6947 vhdr = (struct vlan_ethhdr *)skb->data;
6948 vhdr->h_vlan_TCI = htons(tx_flags >>
6949 IXGBE_TX_FLAGS_VLAN_SHIFT);
6950 } else {
6951 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6952 }
6953 }
6954
6955 /* record initial flags and protocol */
6956 first->tx_flags = tx_flags;
6957 first->protocol = protocol;
6958
6959 #ifdef IXGBE_FCOE
6960 /* setup tx offload for FCoE */
6961 if ((protocol == __constant_htons(ETH_P_FCOE)) &&
6962 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
6963 tso = ixgbe_fso(tx_ring, first, &hdr_len);
6964 if (tso < 0)
6965 goto out_drop;
6966
6967 goto xmit_fcoe;
6968 }
6969
6970 #endif /* IXGBE_FCOE */
6971 tso = ixgbe_tso(tx_ring, first, &hdr_len);
6972 if (tso < 0)
6973 goto out_drop;
6974 else if (!tso)
6975 ixgbe_tx_csum(tx_ring, first);
6976
6977 /* add the ATR filter if ATR is on */
6978 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6979 ixgbe_atr(tx_ring, first);
6980
6981 #ifdef IXGBE_FCOE
6982 xmit_fcoe:
6983 #endif /* IXGBE_FCOE */
6984 ixgbe_tx_map(tx_ring, first, hdr_len);
6985
6986 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6987
6988 return NETDEV_TX_OK;
6989
6990 out_drop:
6991 dev_kfree_skb_any(first->skb);
6992 first->skb = NULL;
6993
6994 return NETDEV_TX_OK;
6995 }
6996
6997 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
6998 struct net_device *netdev,
6999 struct ixgbe_ring *ring)
7000 {
7001 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7002 struct ixgbe_ring *tx_ring;
7003
7004 /*
7005 * The minimum packet size for olinfo paylen is 17 so pad the skb
7006 * in order to meet this minimum size requirement.
7007 */
7008 if (unlikely(skb->len < 17)) {
7009 if (skb_pad(skb, 17 - skb->len))
7010 return NETDEV_TX_OK;
7011 skb->len = 17;
7012 skb_set_tail_pointer(skb, 17);
7013 }
7014
7015 tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
7016
7017 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
7018 }
7019
7020 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
7021 struct net_device *netdev)
7022 {
7023 return __ixgbe_xmit_frame(skb, netdev, NULL);
7024 }
7025
7026 /**
7027 * ixgbe_set_mac - Change the Ethernet Address of the NIC
7028 * @netdev: network interface device structure
7029 * @p: pointer to an address structure
7030 *
7031 * Returns 0 on success, negative on failure
7032 **/
7033 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7034 {
7035 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7036 struct ixgbe_hw *hw = &adapter->hw;
7037 struct sockaddr *addr = p;
7038
7039 if (!is_valid_ether_addr(addr->sa_data))
7040 return -EADDRNOTAVAIL;
7041
7042 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7043 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7044
7045 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
7046
7047 return 0;
7048 }
7049
7050 static int
7051 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7052 {
7053 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7054 struct ixgbe_hw *hw = &adapter->hw;
7055 u16 value;
7056 int rc;
7057
7058 if (prtad != hw->phy.mdio.prtad)
7059 return -EINVAL;
7060 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7061 if (!rc)
7062 rc = value;
7063 return rc;
7064 }
7065
7066 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
7067 u16 addr, u16 value)
7068 {
7069 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7070 struct ixgbe_hw *hw = &adapter->hw;
7071
7072 if (prtad != hw->phy.mdio.prtad)
7073 return -EINVAL;
7074 return hw->phy.ops.write_reg(hw, addr, devad, value);
7075 }
7076
7077 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
7078 {
7079 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7080
7081 switch (cmd) {
7082 case SIOCSHWTSTAMP:
7083 return ixgbe_ptp_hwtstamp_ioctl(adapter, req, cmd);
7084 default:
7085 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
7086 }
7087 }
7088
7089 /**
7090 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
7091 * netdev->dev_addrs
7092 * @netdev: network interface device structure
7093 *
7094 * Returns non-zero on failure
7095 **/
7096 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
7097 {
7098 int err = 0;
7099 struct ixgbe_adapter *adapter = netdev_priv(dev);
7100 struct ixgbe_hw *hw = &adapter->hw;
7101
7102 if (is_valid_ether_addr(hw->mac.san_addr)) {
7103 rtnl_lock();
7104 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
7105 rtnl_unlock();
7106
7107 /* update SAN MAC vmdq pool selection */
7108 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
7109 }
7110 return err;
7111 }
7112
7113 /**
7114 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
7115 * netdev->dev_addrs
7116 * @netdev: network interface device structure
7117 *
7118 * Returns non-zero on failure
7119 **/
7120 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
7121 {
7122 int err = 0;
7123 struct ixgbe_adapter *adapter = netdev_priv(dev);
7124 struct ixgbe_mac_info *mac = &adapter->hw.mac;
7125
7126 if (is_valid_ether_addr(mac->san_addr)) {
7127 rtnl_lock();
7128 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
7129 rtnl_unlock();
7130 }
7131 return err;
7132 }
7133
7134 #ifdef CONFIG_NET_POLL_CONTROLLER
7135 /*
7136 * Polling 'interrupt' - used by things like netconsole to send skbs
7137 * without having to re-enable interrupts. It's not called while
7138 * the interrupt routine is executing.
7139 */
7140 static void ixgbe_netpoll(struct net_device *netdev)
7141 {
7142 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7143 int i;
7144
7145 /* if interface is down do nothing */
7146 if (test_bit(__IXGBE_DOWN, &adapter->state))
7147 return;
7148
7149 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
7150 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
7151 for (i = 0; i < adapter->num_q_vectors; i++)
7152 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
7153 } else {
7154 ixgbe_intr(adapter->pdev->irq, netdev);
7155 }
7156 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
7157 }
7158
7159 #endif
7160 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
7161 struct rtnl_link_stats64 *stats)
7162 {
7163 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7164 int i;
7165
7166 rcu_read_lock();
7167 for (i = 0; i < adapter->num_rx_queues; i++) {
7168 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
7169 u64 bytes, packets;
7170 unsigned int start;
7171
7172 if (ring) {
7173 do {
7174 start = u64_stats_fetch_begin_bh(&ring->syncp);
7175 packets = ring->stats.packets;
7176 bytes = ring->stats.bytes;
7177 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7178 stats->rx_packets += packets;
7179 stats->rx_bytes += bytes;
7180 }
7181 }
7182
7183 for (i = 0; i < adapter->num_tx_queues; i++) {
7184 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7185 u64 bytes, packets;
7186 unsigned int start;
7187
7188 if (ring) {
7189 do {
7190 start = u64_stats_fetch_begin_bh(&ring->syncp);
7191 packets = ring->stats.packets;
7192 bytes = ring->stats.bytes;
7193 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7194 stats->tx_packets += packets;
7195 stats->tx_bytes += bytes;
7196 }
7197 }
7198 rcu_read_unlock();
7199 /* following stats updated by ixgbe_watchdog_task() */
7200 stats->multicast = netdev->stats.multicast;
7201 stats->rx_errors = netdev->stats.rx_errors;
7202 stats->rx_length_errors = netdev->stats.rx_length_errors;
7203 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
7204 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7205 return stats;
7206 }
7207
7208 #ifdef CONFIG_IXGBE_DCB
7209 /**
7210 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7211 * @adapter: pointer to ixgbe_adapter
7212 * @tc: number of traffic classes currently enabled
7213 *
7214 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7215 * 802.1Q priority maps to a packet buffer that exists.
7216 */
7217 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7218 {
7219 struct ixgbe_hw *hw = &adapter->hw;
7220 u32 reg, rsave;
7221 int i;
7222
7223 /* 82598 have a static priority to TC mapping that can not
7224 * be changed so no validation is needed.
7225 */
7226 if (hw->mac.type == ixgbe_mac_82598EB)
7227 return;
7228
7229 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7230 rsave = reg;
7231
7232 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7233 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7234
7235 /* If up2tc is out of bounds default to zero */
7236 if (up2tc > tc)
7237 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7238 }
7239
7240 if (reg != rsave)
7241 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7242
7243 return;
7244 }
7245
7246 /**
7247 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
7248 * @adapter: Pointer to adapter struct
7249 *
7250 * Populate the netdev user priority to tc map
7251 */
7252 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
7253 {
7254 struct net_device *dev = adapter->netdev;
7255 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
7256 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
7257 u8 prio;
7258
7259 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
7260 u8 tc = 0;
7261
7262 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
7263 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
7264 else if (ets)
7265 tc = ets->prio_tc[prio];
7266
7267 netdev_set_prio_tc_map(dev, prio, tc);
7268 }
7269 }
7270
7271 #endif /* CONFIG_IXGBE_DCB */
7272 /**
7273 * ixgbe_setup_tc - configure net_device for multiple traffic classes
7274 *
7275 * @netdev: net device to configure
7276 * @tc: number of traffic classes to enable
7277 */
7278 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7279 {
7280 struct ixgbe_adapter *adapter = netdev_priv(dev);
7281 struct ixgbe_hw *hw = &adapter->hw;
7282 bool pools;
7283
7284 /* Hardware supports up to 8 traffic classes */
7285 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
7286 (hw->mac.type == ixgbe_mac_82598EB &&
7287 tc < MAX_TRAFFIC_CLASS))
7288 return -EINVAL;
7289
7290 pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
7291 if (tc && pools && adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS)
7292 return -EBUSY;
7293
7294 /* Hardware has to reinitialize queues and interrupts to
7295 * match packet buffer alignment. Unfortunately, the
7296 * hardware is not flexible enough to do this dynamically.
7297 */
7298 if (netif_running(dev))
7299 ixgbe_close(dev);
7300 ixgbe_clear_interrupt_scheme(adapter);
7301
7302 #ifdef CONFIG_IXGBE_DCB
7303 if (tc) {
7304 netdev_set_num_tc(dev, tc);
7305 ixgbe_set_prio_tc_map(adapter);
7306
7307 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
7308
7309 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
7310 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
7311 adapter->hw.fc.requested_mode = ixgbe_fc_none;
7312 }
7313 } else {
7314 netdev_reset_tc(dev);
7315
7316 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7317 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
7318
7319 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
7320
7321 adapter->temp_dcb_cfg.pfc_mode_enable = false;
7322 adapter->dcb_cfg.pfc_mode_enable = false;
7323 }
7324
7325 ixgbe_validate_rtr(adapter, tc);
7326
7327 #endif /* CONFIG_IXGBE_DCB */
7328 ixgbe_init_interrupt_scheme(adapter);
7329
7330 if (netif_running(dev))
7331 return ixgbe_open(dev);
7332
7333 return 0;
7334 }
7335
7336 #ifdef CONFIG_PCI_IOV
7337 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
7338 {
7339 struct net_device *netdev = adapter->netdev;
7340
7341 rtnl_lock();
7342 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
7343 rtnl_unlock();
7344 }
7345
7346 #endif
7347 void ixgbe_do_reset(struct net_device *netdev)
7348 {
7349 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7350
7351 if (netif_running(netdev))
7352 ixgbe_reinit_locked(adapter);
7353 else
7354 ixgbe_reset(adapter);
7355 }
7356
7357 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
7358 netdev_features_t features)
7359 {
7360 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7361
7362 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7363 if (!(features & NETIF_F_RXCSUM))
7364 features &= ~NETIF_F_LRO;
7365
7366 /* Turn off LRO if not RSC capable */
7367 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
7368 features &= ~NETIF_F_LRO;
7369
7370 return features;
7371 }
7372
7373 static int ixgbe_set_features(struct net_device *netdev,
7374 netdev_features_t features)
7375 {
7376 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7377 netdev_features_t changed = netdev->features ^ features;
7378 bool need_reset = false;
7379
7380 /* Make sure RSC matches LRO, reset if change */
7381 if (!(features & NETIF_F_LRO)) {
7382 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7383 need_reset = true;
7384 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
7385 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
7386 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7387 if (adapter->rx_itr_setting == 1 ||
7388 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
7389 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
7390 need_reset = true;
7391 } else if ((changed ^ features) & NETIF_F_LRO) {
7392 e_info(probe, "rx-usecs set too low, "
7393 "disabling RSC\n");
7394 }
7395 }
7396
7397 /*
7398 * Check if Flow Director n-tuple support was enabled or disabled. If
7399 * the state changed, we need to reset.
7400 */
7401 switch (features & NETIF_F_NTUPLE) {
7402 case NETIF_F_NTUPLE:
7403 /* turn off ATR, enable perfect filters and reset */
7404 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
7405 need_reset = true;
7406
7407 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7408 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7409 break;
7410 default:
7411 /* turn off perfect filters, enable ATR and reset */
7412 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7413 need_reset = true;
7414
7415 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7416
7417 /* We cannot enable ATR if SR-IOV is enabled */
7418 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7419 break;
7420
7421 /* We cannot enable ATR if we have 2 or more traffic classes */
7422 if (netdev_get_num_tc(netdev) > 1)
7423 break;
7424
7425 /* We cannot enable ATR if RSS is disabled */
7426 if (adapter->ring_feature[RING_F_RSS].limit <= 1)
7427 break;
7428
7429 /* A sample rate of 0 indicates ATR disabled */
7430 if (!adapter->atr_sample_rate)
7431 break;
7432
7433 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7434 break;
7435 }
7436
7437 if (features & NETIF_F_HW_VLAN_CTAG_RX)
7438 ixgbe_vlan_strip_enable(adapter);
7439 else
7440 ixgbe_vlan_strip_disable(adapter);
7441
7442 if (changed & NETIF_F_RXALL)
7443 need_reset = true;
7444
7445 netdev->features = features;
7446 if (need_reset)
7447 ixgbe_do_reset(netdev);
7448
7449 return 0;
7450 }
7451
7452 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
7453 struct net_device *dev,
7454 const unsigned char *addr,
7455 u16 flags)
7456 {
7457 struct ixgbe_adapter *adapter = netdev_priv(dev);
7458 int err;
7459
7460 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7461 return ndo_dflt_fdb_add(ndm, tb, dev, addr, flags);
7462
7463 /* Hardware does not support aging addresses so if a
7464 * ndm_state is given only allow permanent addresses
7465 */
7466 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
7467 pr_info("%s: FDB only supports static addresses\n",
7468 ixgbe_driver_name);
7469 return -EINVAL;
7470 }
7471
7472 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
7473 u32 rar_uc_entries = IXGBE_MAX_PF_MACVLANS;
7474
7475 if (netdev_uc_count(dev) < rar_uc_entries)
7476 err = dev_uc_add_excl(dev, addr);
7477 else
7478 err = -ENOMEM;
7479 } else if (is_multicast_ether_addr(addr)) {
7480 err = dev_mc_add_excl(dev, addr);
7481 } else {
7482 err = -EINVAL;
7483 }
7484
7485 /* Only return duplicate errors if NLM_F_EXCL is set */
7486 if (err == -EEXIST && !(flags & NLM_F_EXCL))
7487 err = 0;
7488
7489 return err;
7490 }
7491
7492 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
7493 struct nlmsghdr *nlh)
7494 {
7495 struct ixgbe_adapter *adapter = netdev_priv(dev);
7496 struct nlattr *attr, *br_spec;
7497 int rem;
7498
7499 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7500 return -EOPNOTSUPP;
7501
7502 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
7503
7504 nla_for_each_nested(attr, br_spec, rem) {
7505 __u16 mode;
7506 u32 reg = 0;
7507
7508 if (nla_type(attr) != IFLA_BRIDGE_MODE)
7509 continue;
7510
7511 mode = nla_get_u16(attr);
7512 if (mode == BRIDGE_MODE_VEPA) {
7513 reg = 0;
7514 adapter->flags2 &= ~IXGBE_FLAG2_BRIDGE_MODE_VEB;
7515 } else if (mode == BRIDGE_MODE_VEB) {
7516 reg = IXGBE_PFDTXGSWC_VT_LBEN;
7517 adapter->flags2 |= IXGBE_FLAG2_BRIDGE_MODE_VEB;
7518 } else
7519 return -EINVAL;
7520
7521 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, reg);
7522
7523 e_info(drv, "enabling bridge mode: %s\n",
7524 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
7525 }
7526
7527 return 0;
7528 }
7529
7530 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
7531 struct net_device *dev,
7532 u32 filter_mask)
7533 {
7534 struct ixgbe_adapter *adapter = netdev_priv(dev);
7535 u16 mode;
7536
7537 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7538 return 0;
7539
7540 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
7541 mode = BRIDGE_MODE_VEB;
7542 else
7543 mode = BRIDGE_MODE_VEPA;
7544
7545 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
7546 }
7547
7548 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
7549 {
7550 struct ixgbe_fwd_adapter *fwd_adapter = NULL;
7551 struct ixgbe_adapter *adapter = netdev_priv(pdev);
7552 unsigned int limit;
7553 int pool, err;
7554
7555 #ifdef CONFIG_RPS
7556 if (vdev->num_rx_queues != vdev->num_tx_queues) {
7557 netdev_info(pdev, "%s: Only supports a single queue count for TX and RX\n",
7558 vdev->name);
7559 return ERR_PTR(-EINVAL);
7560 }
7561 #endif
7562 /* Check for hardware restriction on number of rx/tx queues */
7563 if (vdev->num_tx_queues > IXGBE_MAX_L2A_QUEUES ||
7564 vdev->num_tx_queues == IXGBE_BAD_L2A_QUEUE) {
7565 netdev_info(pdev,
7566 "%s: Supports RX/TX Queue counts 1,2, and 4\n",
7567 pdev->name);
7568 return ERR_PTR(-EINVAL);
7569 }
7570
7571 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7572 adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS - 1) ||
7573 (adapter->num_rx_pools > IXGBE_MAX_MACVLANS))
7574 return ERR_PTR(-EBUSY);
7575
7576 fwd_adapter = kcalloc(1, sizeof(struct ixgbe_fwd_adapter), GFP_KERNEL);
7577 if (!fwd_adapter)
7578 return ERR_PTR(-ENOMEM);
7579
7580 pool = find_first_zero_bit(&adapter->fwd_bitmask, 32);
7581 adapter->num_rx_pools++;
7582 set_bit(pool, &adapter->fwd_bitmask);
7583 limit = find_last_bit(&adapter->fwd_bitmask, 32);
7584
7585 /* Enable VMDq flag so device will be set in VM mode */
7586 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED;
7587 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
7588 adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues;
7589
7590 /* Force reinit of ring allocation with VMDQ enabled */
7591 err = ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
7592 if (err)
7593 goto fwd_add_err;
7594 fwd_adapter->pool = pool;
7595 fwd_adapter->real_adapter = adapter;
7596 err = ixgbe_fwd_ring_up(vdev, fwd_adapter);
7597 if (err)
7598 goto fwd_add_err;
7599 netif_tx_start_all_queues(vdev);
7600 return fwd_adapter;
7601 fwd_add_err:
7602 /* unwind counter and free adapter struct */
7603 netdev_info(pdev,
7604 "%s: dfwd hardware acceleration failed\n", vdev->name);
7605 clear_bit(pool, &adapter->fwd_bitmask);
7606 adapter->num_rx_pools--;
7607 kfree(fwd_adapter);
7608 return ERR_PTR(err);
7609 }
7610
7611 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
7612 {
7613 struct ixgbe_fwd_adapter *fwd_adapter = priv;
7614 struct ixgbe_adapter *adapter = fwd_adapter->real_adapter;
7615 unsigned int limit;
7616
7617 clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask);
7618 adapter->num_rx_pools--;
7619
7620 limit = find_last_bit(&adapter->fwd_bitmask, 32);
7621 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
7622 ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter);
7623 ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
7624 netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
7625 fwd_adapter->pool, adapter->num_rx_pools,
7626 fwd_adapter->rx_base_queue,
7627 fwd_adapter->rx_base_queue + adapter->num_rx_queues_per_pool,
7628 adapter->fwd_bitmask);
7629 kfree(fwd_adapter);
7630 }
7631
7632 static netdev_tx_t ixgbe_fwd_xmit(struct sk_buff *skb,
7633 struct net_device *dev,
7634 void *priv)
7635 {
7636 struct ixgbe_fwd_adapter *fwd_adapter = priv;
7637 unsigned int queue;
7638 struct ixgbe_ring *tx_ring;
7639
7640 queue = skb->queue_mapping + fwd_adapter->tx_base_queue;
7641 tx_ring = fwd_adapter->real_adapter->tx_ring[queue];
7642
7643 return __ixgbe_xmit_frame(skb, dev, tx_ring);
7644 }
7645
7646 static const struct net_device_ops ixgbe_netdev_ops = {
7647 .ndo_open = ixgbe_open,
7648 .ndo_stop = ixgbe_close,
7649 .ndo_start_xmit = ixgbe_xmit_frame,
7650 #ifdef IXGBE_FCOE
7651 .ndo_select_queue = ixgbe_select_queue,
7652 #endif
7653 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7654 .ndo_validate_addr = eth_validate_addr,
7655 .ndo_set_mac_address = ixgbe_set_mac,
7656 .ndo_change_mtu = ixgbe_change_mtu,
7657 .ndo_tx_timeout = ixgbe_tx_timeout,
7658 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7659 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7660 .ndo_do_ioctl = ixgbe_ioctl,
7661 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7662 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7663 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
7664 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
7665 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7666 .ndo_get_stats64 = ixgbe_get_stats64,
7667 #ifdef CONFIG_IXGBE_DCB
7668 .ndo_setup_tc = ixgbe_setup_tc,
7669 #endif
7670 #ifdef CONFIG_NET_POLL_CONTROLLER
7671 .ndo_poll_controller = ixgbe_netpoll,
7672 #endif
7673 #ifdef CONFIG_NET_RX_BUSY_POLL
7674 .ndo_busy_poll = ixgbe_low_latency_recv,
7675 #endif
7676 #ifdef IXGBE_FCOE
7677 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7678 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7679 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7680 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7681 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7682 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7683 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
7684 #endif /* IXGBE_FCOE */
7685 .ndo_set_features = ixgbe_set_features,
7686 .ndo_fix_features = ixgbe_fix_features,
7687 .ndo_fdb_add = ixgbe_ndo_fdb_add,
7688 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
7689 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
7690 .ndo_dfwd_add_station = ixgbe_fwd_add,
7691 .ndo_dfwd_del_station = ixgbe_fwd_del,
7692 .ndo_dfwd_start_xmit = ixgbe_fwd_xmit,
7693 };
7694
7695 /**
7696 * ixgbe_enumerate_functions - Get the number of ports this device has
7697 * @adapter: adapter structure
7698 *
7699 * This function enumerates the phsyical functions co-located on a single slot,
7700 * in order to determine how many ports a device has. This is most useful in
7701 * determining the required GT/s of PCIe bandwidth necessary for optimal
7702 * performance.
7703 **/
7704 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
7705 {
7706 struct list_head *entry;
7707 int physfns = 0;
7708
7709 /* Some cards can not use the generic count PCIe functions method,
7710 * because they are behind a parent switch, so we hardcode these with
7711 * the correct number of functions.
7712 */
7713 if (ixgbe_pcie_from_parent(&adapter->hw)) {
7714 physfns = 4;
7715 } else {
7716 list_for_each(entry, &adapter->pdev->bus_list) {
7717 struct pci_dev *pdev =
7718 list_entry(entry, struct pci_dev, bus_list);
7719 /* don't count virtual functions */
7720 if (!pdev->is_virtfn)
7721 physfns++;
7722 }
7723 }
7724
7725 return physfns;
7726 }
7727
7728 /**
7729 * ixgbe_wol_supported - Check whether device supports WoL
7730 * @hw: hw specific details
7731 * @device_id: the device ID
7732 * @subdev_id: the subsystem device ID
7733 *
7734 * This function is used by probe and ethtool to determine
7735 * which devices have WoL support
7736 *
7737 **/
7738 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
7739 u16 subdevice_id)
7740 {
7741 struct ixgbe_hw *hw = &adapter->hw;
7742 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
7743 int is_wol_supported = 0;
7744
7745 switch (device_id) {
7746 case IXGBE_DEV_ID_82599_SFP:
7747 /* Only these subdevices could supports WOL */
7748 switch (subdevice_id) {
7749 case IXGBE_SUBDEV_ID_82599_560FLR:
7750 /* only support first port */
7751 if (hw->bus.func != 0)
7752 break;
7753 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
7754 case IXGBE_SUBDEV_ID_82599_SFP:
7755 case IXGBE_SUBDEV_ID_82599_RNDC:
7756 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
7757 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
7758 is_wol_supported = 1;
7759 break;
7760 }
7761 break;
7762 case IXGBE_DEV_ID_82599EN_SFP:
7763 /* Only this subdevice supports WOL */
7764 switch (subdevice_id) {
7765 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
7766 is_wol_supported = 1;
7767 break;
7768 }
7769 break;
7770 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7771 /* All except this subdevice support WOL */
7772 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7773 is_wol_supported = 1;
7774 break;
7775 case IXGBE_DEV_ID_82599_KX4:
7776 is_wol_supported = 1;
7777 break;
7778 case IXGBE_DEV_ID_X540T:
7779 case IXGBE_DEV_ID_X540T1:
7780 /* check eeprom to see if enabled wol */
7781 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
7782 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
7783 (hw->bus.func == 0))) {
7784 is_wol_supported = 1;
7785 }
7786 break;
7787 }
7788
7789 return is_wol_supported;
7790 }
7791
7792 /**
7793 * ixgbe_probe - Device Initialization Routine
7794 * @pdev: PCI device information struct
7795 * @ent: entry in ixgbe_pci_tbl
7796 *
7797 * Returns 0 on success, negative on failure
7798 *
7799 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7800 * The OS initialization, configuring of the adapter private structure,
7801 * and a hardware reset occur.
7802 **/
7803 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7804 {
7805 struct net_device *netdev;
7806 struct ixgbe_adapter *adapter = NULL;
7807 struct ixgbe_hw *hw;
7808 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7809 static int cards_found;
7810 int i, err, pci_using_dac, expected_gts;
7811 unsigned int indices = MAX_TX_QUEUES;
7812 u8 part_str[IXGBE_PBANUM_LENGTH];
7813 #ifdef IXGBE_FCOE
7814 u16 device_caps;
7815 #endif
7816 u32 eec;
7817
7818 /* Catch broken hardware that put the wrong VF device ID in
7819 * the PCIe SR-IOV capability.
7820 */
7821 if (pdev->is_virtfn) {
7822 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7823 pci_name(pdev), pdev->vendor, pdev->device);
7824 return -EINVAL;
7825 }
7826
7827 err = pci_enable_device_mem(pdev);
7828 if (err)
7829 return err;
7830
7831 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
7832 pci_using_dac = 1;
7833 } else {
7834 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
7835 if (err) {
7836 dev_err(&pdev->dev,
7837 "No usable DMA configuration, aborting\n");
7838 goto err_dma;
7839 }
7840 pci_using_dac = 0;
7841 }
7842
7843 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7844 IORESOURCE_MEM), ixgbe_driver_name);
7845 if (err) {
7846 dev_err(&pdev->dev,
7847 "pci_request_selected_regions failed 0x%x\n", err);
7848 goto err_pci_reg;
7849 }
7850
7851 pci_enable_pcie_error_reporting(pdev);
7852
7853 pci_set_master(pdev);
7854 pci_save_state(pdev);
7855
7856 if (ii->mac == ixgbe_mac_82598EB) {
7857 #ifdef CONFIG_IXGBE_DCB
7858 /* 8 TC w/ 4 queues per TC */
7859 indices = 4 * MAX_TRAFFIC_CLASS;
7860 #else
7861 indices = IXGBE_MAX_RSS_INDICES;
7862 #endif
7863 }
7864
7865 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7866 if (!netdev) {
7867 err = -ENOMEM;
7868 goto err_alloc_etherdev;
7869 }
7870
7871 SET_NETDEV_DEV(netdev, &pdev->dev);
7872
7873 adapter = netdev_priv(netdev);
7874 pci_set_drvdata(pdev, adapter);
7875
7876 adapter->netdev = netdev;
7877 adapter->pdev = pdev;
7878 hw = &adapter->hw;
7879 hw->back = adapter;
7880 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
7881
7882 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7883 pci_resource_len(pdev, 0));
7884 if (!hw->hw_addr) {
7885 err = -EIO;
7886 goto err_ioremap;
7887 }
7888
7889 netdev->netdev_ops = &ixgbe_netdev_ops;
7890 ixgbe_set_ethtool_ops(netdev);
7891 netdev->watchdog_timeo = 5 * HZ;
7892 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7893
7894 adapter->bd_number = cards_found;
7895
7896 /* Setup hw api */
7897 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7898 hw->mac.type = ii->mac;
7899
7900 /* EEPROM */
7901 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7902 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7903 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7904 if (!(eec & (1 << 8)))
7905 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7906
7907 /* PHY */
7908 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7909 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7910 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7911 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7912 hw->phy.mdio.mmds = 0;
7913 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7914 hw->phy.mdio.dev = netdev;
7915 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7916 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7917
7918 ii->get_invariants(hw);
7919
7920 /* setup the private structure */
7921 err = ixgbe_sw_init(adapter);
7922 if (err)
7923 goto err_sw_init;
7924
7925 /* Cache if MNG FW is up so we don't have to read the REG later */
7926 if (hw->mac.ops.mng_fw_enabled)
7927 hw->mng_fw_enabled = hw->mac.ops.mng_fw_enabled(hw);
7928
7929 /* Make it possible the adapter to be woken up via WOL */
7930 switch (adapter->hw.mac.type) {
7931 case ixgbe_mac_82599EB:
7932 case ixgbe_mac_X540:
7933 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7934 break;
7935 default:
7936 break;
7937 }
7938
7939 /*
7940 * If there is a fan on this device and it has failed log the
7941 * failure.
7942 */
7943 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7944 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7945 if (esdp & IXGBE_ESDP_SDP1)
7946 e_crit(probe, "Fan has stopped, replace the adapter\n");
7947 }
7948
7949 if (allow_unsupported_sfp)
7950 hw->allow_unsupported_sfp = allow_unsupported_sfp;
7951
7952 /* reset_hw fills in the perm_addr as well */
7953 hw->phy.reset_if_overtemp = true;
7954 err = hw->mac.ops.reset_hw(hw);
7955 hw->phy.reset_if_overtemp = false;
7956 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7957 hw->mac.type == ixgbe_mac_82598EB) {
7958 err = 0;
7959 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7960 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
7961 e_dev_err("Reload the driver after installing a supported module.\n");
7962 goto err_sw_init;
7963 } else if (err) {
7964 e_dev_err("HW Init failed: %d\n", err);
7965 goto err_sw_init;
7966 }
7967
7968 #ifdef CONFIG_PCI_IOV
7969 /* SR-IOV not supported on the 82598 */
7970 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7971 goto skip_sriov;
7972 /* Mailbox */
7973 ixgbe_init_mbx_params_pf(hw);
7974 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
7975 ixgbe_enable_sriov(adapter);
7976 pci_sriov_set_totalvfs(pdev, 63);
7977 skip_sriov:
7978
7979 #endif
7980 netdev->features = NETIF_F_SG |
7981 NETIF_F_IP_CSUM |
7982 NETIF_F_IPV6_CSUM |
7983 NETIF_F_HW_VLAN_CTAG_TX |
7984 NETIF_F_HW_VLAN_CTAG_RX |
7985 NETIF_F_HW_VLAN_CTAG_FILTER |
7986 NETIF_F_TSO |
7987 NETIF_F_TSO6 |
7988 NETIF_F_RXHASH |
7989 NETIF_F_RXCSUM;
7990
7991 netdev->hw_features = netdev->features | NETIF_F_HW_L2FW_DOFFLOAD;
7992
7993 switch (adapter->hw.mac.type) {
7994 case ixgbe_mac_82599EB:
7995 case ixgbe_mac_X540:
7996 netdev->features |= NETIF_F_SCTP_CSUM;
7997 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7998 NETIF_F_NTUPLE;
7999 break;
8000 default:
8001 break;
8002 }
8003
8004 netdev->hw_features |= NETIF_F_RXALL;
8005
8006 netdev->vlan_features |= NETIF_F_TSO;
8007 netdev->vlan_features |= NETIF_F_TSO6;
8008 netdev->vlan_features |= NETIF_F_IP_CSUM;
8009 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
8010 netdev->vlan_features |= NETIF_F_SG;
8011
8012 netdev->priv_flags |= IFF_UNICAST_FLT;
8013 netdev->priv_flags |= IFF_SUPP_NOFCS;
8014
8015 #ifdef CONFIG_IXGBE_DCB
8016 netdev->dcbnl_ops = &dcbnl_ops;
8017 #endif
8018
8019 #ifdef IXGBE_FCOE
8020 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
8021 unsigned int fcoe_l;
8022
8023 if (hw->mac.ops.get_device_caps) {
8024 hw->mac.ops.get_device_caps(hw, &device_caps);
8025 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
8026 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
8027 }
8028
8029
8030 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
8031 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
8032
8033 netdev->features |= NETIF_F_FSO |
8034 NETIF_F_FCOE_CRC;
8035
8036 netdev->vlan_features |= NETIF_F_FSO |
8037 NETIF_F_FCOE_CRC |
8038 NETIF_F_FCOE_MTU;
8039 }
8040 #endif /* IXGBE_FCOE */
8041 if (pci_using_dac) {
8042 netdev->features |= NETIF_F_HIGHDMA;
8043 netdev->vlan_features |= NETIF_F_HIGHDMA;
8044 }
8045
8046 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
8047 netdev->hw_features |= NETIF_F_LRO;
8048 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
8049 netdev->features |= NETIF_F_LRO;
8050
8051 /* make sure the EEPROM is good */
8052 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
8053 e_dev_err("The EEPROM Checksum Is Not Valid\n");
8054 err = -EIO;
8055 goto err_sw_init;
8056 }
8057
8058 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
8059
8060 if (!is_valid_ether_addr(netdev->dev_addr)) {
8061 e_dev_err("invalid MAC address\n");
8062 err = -EIO;
8063 goto err_sw_init;
8064 }
8065
8066 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
8067 (unsigned long) adapter);
8068
8069 INIT_WORK(&adapter->service_task, ixgbe_service_task);
8070 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
8071
8072 err = ixgbe_init_interrupt_scheme(adapter);
8073 if (err)
8074 goto err_sw_init;
8075
8076 /* WOL not supported for all devices */
8077 adapter->wol = 0;
8078 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
8079 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
8080 pdev->subsystem_device);
8081 if (hw->wol_enabled)
8082 adapter->wol = IXGBE_WUFC_MAG;
8083
8084 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
8085
8086 /* save off EEPROM version number */
8087 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
8088 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
8089
8090 /* pick up the PCI bus settings for reporting later */
8091 hw->mac.ops.get_bus_info(hw);
8092 if (ixgbe_pcie_from_parent(hw))
8093 ixgbe_get_parent_bus_info(adapter);
8094
8095 /* calculate the expected PCIe bandwidth required for optimal
8096 * performance. Note that some older parts will never have enough
8097 * bandwidth due to being older generation PCIe parts. We clamp these
8098 * parts to ensure no warning is displayed if it can't be fixed.
8099 */
8100 switch (hw->mac.type) {
8101 case ixgbe_mac_82598EB:
8102 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
8103 break;
8104 default:
8105 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
8106 break;
8107 }
8108 ixgbe_check_minimum_link(adapter, expected_gts);
8109
8110 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
8111 if (err)
8112 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
8113 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
8114 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
8115 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
8116 part_str);
8117 else
8118 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
8119 hw->mac.type, hw->phy.type, part_str);
8120
8121 e_dev_info("%pM\n", netdev->dev_addr);
8122
8123 /* reset the hardware with the new settings */
8124 err = hw->mac.ops.start_hw(hw);
8125 if (err == IXGBE_ERR_EEPROM_VERSION) {
8126 /* We are running on a pre-production device, log a warning */
8127 e_dev_warn("This device is a pre-production adapter/LOM. "
8128 "Please be aware there may be issues associated "
8129 "with your hardware. If you are experiencing "
8130 "problems please contact your Intel or hardware "
8131 "representative who provided you with this "
8132 "hardware.\n");
8133 }
8134 strcpy(netdev->name, "eth%d");
8135 err = register_netdev(netdev);
8136 if (err)
8137 goto err_register;
8138
8139 /* power down the optics for 82599 SFP+ fiber */
8140 if (hw->mac.ops.disable_tx_laser)
8141 hw->mac.ops.disable_tx_laser(hw);
8142
8143 /* carrier off reporting is important to ethtool even BEFORE open */
8144 netif_carrier_off(netdev);
8145
8146 #ifdef CONFIG_IXGBE_DCA
8147 if (dca_add_requester(&pdev->dev) == 0) {
8148 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
8149 ixgbe_setup_dca(adapter);
8150 }
8151 #endif
8152 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
8153 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
8154 for (i = 0; i < adapter->num_vfs; i++)
8155 ixgbe_vf_configuration(pdev, (i | 0x10000000));
8156 }
8157
8158 /* firmware requires driver version to be 0xFFFFFFFF
8159 * since os does not support feature
8160 */
8161 if (hw->mac.ops.set_fw_drv_ver)
8162 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
8163 0xFF);
8164
8165 /* add san mac addr to netdev */
8166 ixgbe_add_sanmac_netdev(netdev);
8167
8168 e_dev_info("%s\n", ixgbe_default_device_descr);
8169 cards_found++;
8170
8171 #ifdef CONFIG_IXGBE_HWMON
8172 if (ixgbe_sysfs_init(adapter))
8173 e_err(probe, "failed to allocate sysfs resources\n");
8174 #endif /* CONFIG_IXGBE_HWMON */
8175
8176 ixgbe_dbg_adapter_init(adapter);
8177
8178 /* Need link setup for MNG FW, else wait for IXGBE_UP */
8179 if (hw->mng_fw_enabled && hw->mac.ops.setup_link)
8180 hw->mac.ops.setup_link(hw,
8181 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
8182 true);
8183
8184 return 0;
8185
8186 err_register:
8187 ixgbe_release_hw_control(adapter);
8188 ixgbe_clear_interrupt_scheme(adapter);
8189 err_sw_init:
8190 ixgbe_disable_sriov(adapter);
8191 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
8192 iounmap(hw->hw_addr);
8193 err_ioremap:
8194 free_netdev(netdev);
8195 err_alloc_etherdev:
8196 pci_release_selected_regions(pdev,
8197 pci_select_bars(pdev, IORESOURCE_MEM));
8198 err_pci_reg:
8199 err_dma:
8200 pci_disable_device(pdev);
8201 return err;
8202 }
8203
8204 /**
8205 * ixgbe_remove - Device Removal Routine
8206 * @pdev: PCI device information struct
8207 *
8208 * ixgbe_remove is called by the PCI subsystem to alert the driver
8209 * that it should release a PCI device. The could be caused by a
8210 * Hot-Plug event, or because the driver is going to be removed from
8211 * memory.
8212 **/
8213 static void ixgbe_remove(struct pci_dev *pdev)
8214 {
8215 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8216 struct net_device *netdev = adapter->netdev;
8217
8218 ixgbe_dbg_adapter_exit(adapter);
8219
8220 set_bit(__IXGBE_DOWN, &adapter->state);
8221 cancel_work_sync(&adapter->service_task);
8222
8223
8224 #ifdef CONFIG_IXGBE_DCA
8225 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
8226 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
8227 dca_remove_requester(&pdev->dev);
8228 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
8229 }
8230
8231 #endif
8232 #ifdef CONFIG_IXGBE_HWMON
8233 ixgbe_sysfs_exit(adapter);
8234 #endif /* CONFIG_IXGBE_HWMON */
8235
8236 /* remove the added san mac */
8237 ixgbe_del_sanmac_netdev(netdev);
8238
8239 if (netdev->reg_state == NETREG_REGISTERED)
8240 unregister_netdev(netdev);
8241
8242 #ifdef CONFIG_PCI_IOV
8243 /*
8244 * Only disable SR-IOV on unload if the user specified the now
8245 * deprecated max_vfs module parameter.
8246 */
8247 if (max_vfs)
8248 ixgbe_disable_sriov(adapter);
8249 #endif
8250 ixgbe_clear_interrupt_scheme(adapter);
8251
8252 ixgbe_release_hw_control(adapter);
8253
8254 #ifdef CONFIG_DCB
8255 kfree(adapter->ixgbe_ieee_pfc);
8256 kfree(adapter->ixgbe_ieee_ets);
8257
8258 #endif
8259 iounmap(adapter->hw.hw_addr);
8260 pci_release_selected_regions(pdev, pci_select_bars(pdev,
8261 IORESOURCE_MEM));
8262
8263 e_dev_info("complete\n");
8264
8265 free_netdev(netdev);
8266
8267 pci_disable_pcie_error_reporting(pdev);
8268
8269 pci_disable_device(pdev);
8270 }
8271
8272 /**
8273 * ixgbe_io_error_detected - called when PCI error is detected
8274 * @pdev: Pointer to PCI device
8275 * @state: The current pci connection state
8276 *
8277 * This function is called after a PCI bus error affecting
8278 * this device has been detected.
8279 */
8280 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
8281 pci_channel_state_t state)
8282 {
8283 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8284 struct net_device *netdev = adapter->netdev;
8285
8286 #ifdef CONFIG_PCI_IOV
8287 struct pci_dev *bdev, *vfdev;
8288 u32 dw0, dw1, dw2, dw3;
8289 int vf, pos;
8290 u16 req_id, pf_func;
8291
8292 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
8293 adapter->num_vfs == 0)
8294 goto skip_bad_vf_detection;
8295
8296 bdev = pdev->bus->self;
8297 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
8298 bdev = bdev->bus->self;
8299
8300 if (!bdev)
8301 goto skip_bad_vf_detection;
8302
8303 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
8304 if (!pos)
8305 goto skip_bad_vf_detection;
8306
8307 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
8308 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
8309 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
8310 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
8311
8312 req_id = dw1 >> 16;
8313 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
8314 if (!(req_id & 0x0080))
8315 goto skip_bad_vf_detection;
8316
8317 pf_func = req_id & 0x01;
8318 if ((pf_func & 1) == (pdev->devfn & 1)) {
8319 unsigned int device_id;
8320
8321 vf = (req_id & 0x7F) >> 1;
8322 e_dev_err("VF %d has caused a PCIe error\n", vf);
8323 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
8324 "%8.8x\tdw3: %8.8x\n",
8325 dw0, dw1, dw2, dw3);
8326 switch (adapter->hw.mac.type) {
8327 case ixgbe_mac_82599EB:
8328 device_id = IXGBE_82599_VF_DEVICE_ID;
8329 break;
8330 case ixgbe_mac_X540:
8331 device_id = IXGBE_X540_VF_DEVICE_ID;
8332 break;
8333 default:
8334 device_id = 0;
8335 break;
8336 }
8337
8338 /* Find the pci device of the offending VF */
8339 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
8340 while (vfdev) {
8341 if (vfdev->devfn == (req_id & 0xFF))
8342 break;
8343 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
8344 device_id, vfdev);
8345 }
8346 /*
8347 * There's a slim chance the VF could have been hot plugged,
8348 * so if it is no longer present we don't need to issue the
8349 * VFLR. Just clean up the AER in that case.
8350 */
8351 if (vfdev) {
8352 e_dev_err("Issuing VFLR to VF %d\n", vf);
8353 pci_write_config_dword(vfdev, 0xA8, 0x00008000);
8354 /* Free device reference count */
8355 pci_dev_put(vfdev);
8356 }
8357
8358 pci_cleanup_aer_uncorrect_error_status(pdev);
8359 }
8360
8361 /*
8362 * Even though the error may have occurred on the other port
8363 * we still need to increment the vf error reference count for
8364 * both ports because the I/O resume function will be called
8365 * for both of them.
8366 */
8367 adapter->vferr_refcount++;
8368
8369 return PCI_ERS_RESULT_RECOVERED;
8370
8371 skip_bad_vf_detection:
8372 #endif /* CONFIG_PCI_IOV */
8373 netif_device_detach(netdev);
8374
8375 if (state == pci_channel_io_perm_failure)
8376 return PCI_ERS_RESULT_DISCONNECT;
8377
8378 if (netif_running(netdev))
8379 ixgbe_down(adapter);
8380 pci_disable_device(pdev);
8381
8382 /* Request a slot reset. */
8383 return PCI_ERS_RESULT_NEED_RESET;
8384 }
8385
8386 /**
8387 * ixgbe_io_slot_reset - called after the pci bus has been reset.
8388 * @pdev: Pointer to PCI device
8389 *
8390 * Restart the card from scratch, as if from a cold-boot.
8391 */
8392 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
8393 {
8394 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8395 pci_ers_result_t result;
8396 int err;
8397
8398 if (pci_enable_device_mem(pdev)) {
8399 e_err(probe, "Cannot re-enable PCI device after reset.\n");
8400 result = PCI_ERS_RESULT_DISCONNECT;
8401 } else {
8402 pci_set_master(pdev);
8403 pci_restore_state(pdev);
8404 pci_save_state(pdev);
8405
8406 pci_wake_from_d3(pdev, false);
8407
8408 ixgbe_reset(adapter);
8409 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
8410 result = PCI_ERS_RESULT_RECOVERED;
8411 }
8412
8413 err = pci_cleanup_aer_uncorrect_error_status(pdev);
8414 if (err) {
8415 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
8416 "failed 0x%0x\n", err);
8417 /* non-fatal, continue */
8418 }
8419
8420 return result;
8421 }
8422
8423 /**
8424 * ixgbe_io_resume - called when traffic can start flowing again.
8425 * @pdev: Pointer to PCI device
8426 *
8427 * This callback is called when the error recovery driver tells us that
8428 * its OK to resume normal operation.
8429 */
8430 static void ixgbe_io_resume(struct pci_dev *pdev)
8431 {
8432 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8433 struct net_device *netdev = adapter->netdev;
8434
8435 #ifdef CONFIG_PCI_IOV
8436 if (adapter->vferr_refcount) {
8437 e_info(drv, "Resuming after VF err\n");
8438 adapter->vferr_refcount--;
8439 return;
8440 }
8441
8442 #endif
8443 if (netif_running(netdev))
8444 ixgbe_up(adapter);
8445
8446 netif_device_attach(netdev);
8447 }
8448
8449 static const struct pci_error_handlers ixgbe_err_handler = {
8450 .error_detected = ixgbe_io_error_detected,
8451 .slot_reset = ixgbe_io_slot_reset,
8452 .resume = ixgbe_io_resume,
8453 };
8454
8455 static struct pci_driver ixgbe_driver = {
8456 .name = ixgbe_driver_name,
8457 .id_table = ixgbe_pci_tbl,
8458 .probe = ixgbe_probe,
8459 .remove = ixgbe_remove,
8460 #ifdef CONFIG_PM
8461 .suspend = ixgbe_suspend,
8462 .resume = ixgbe_resume,
8463 #endif
8464 .shutdown = ixgbe_shutdown,
8465 .sriov_configure = ixgbe_pci_sriov_configure,
8466 .err_handler = &ixgbe_err_handler
8467 };
8468
8469 /**
8470 * ixgbe_init_module - Driver Registration Routine
8471 *
8472 * ixgbe_init_module is the first routine called when the driver is
8473 * loaded. All it does is register with the PCI subsystem.
8474 **/
8475 static int __init ixgbe_init_module(void)
8476 {
8477 int ret;
8478 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
8479 pr_info("%s\n", ixgbe_copyright);
8480
8481 ixgbe_dbg_init();
8482
8483 ret = pci_register_driver(&ixgbe_driver);
8484 if (ret) {
8485 ixgbe_dbg_exit();
8486 return ret;
8487 }
8488
8489 #ifdef CONFIG_IXGBE_DCA
8490 dca_register_notify(&dca_notifier);
8491 #endif
8492
8493 return 0;
8494 }
8495
8496 module_init(ixgbe_init_module);
8497
8498 /**
8499 * ixgbe_exit_module - Driver Exit Cleanup Routine
8500 *
8501 * ixgbe_exit_module is called just before the driver is removed
8502 * from memory.
8503 **/
8504 static void __exit ixgbe_exit_module(void)
8505 {
8506 #ifdef CONFIG_IXGBE_DCA
8507 dca_unregister_notify(&dca_notifier);
8508 #endif
8509 pci_unregister_driver(&ixgbe_driver);
8510
8511 ixgbe_dbg_exit();
8512
8513 rcu_barrier(); /* Wait for completion of call_rcu()'s */
8514 }
8515
8516 #ifdef CONFIG_IXGBE_DCA
8517 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
8518 void *p)
8519 {
8520 int ret_val;
8521
8522 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
8523 __ixgbe_notify_dca);
8524
8525 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8526 }
8527
8528 #endif /* CONFIG_IXGBE_DCA */
8529
8530 module_exit(ixgbe_exit_module);
8531
8532 /* ixgbe_main.c */
Linux kernel - Deliverables
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