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ixbge: fix bug when using large pages and jumbo frames
[deliverable/linux.git] / drivers / net / netxen / netxen_nic_main.c
CommitLineData
3d396eb1
AK		 1/*
2 * Copyright (C) 2003 - 2006 NetXen, Inc.
3 * All rights reserved.
80922fbc 4 *
3d396eb1
AK		 5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
80922fbc 9 *
3d396eb1
AK		 10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
80922fbc 14 *
3d396eb1
AK		 15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 * MA 02111-1307, USA.
80922fbc 19 *
3d396eb1
AK		 20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
80922fbc 22 *
3d396eb1
AK		 23 * Contact Information:
24 * info@netxen.com
25 * NetXen,
26 * 3965 Freedom Circle, Fourth floor,
27 * Santa Clara, CA 95054
28 *
29 *
30 * Main source file for NetXen NIC Driver on Linux
31 *
32 */
33
cb8011ad 34#include <linux/vmalloc.h>
ed25ffa1 35#include <linux/highmem.h>
3d396eb1
AK		 36#include "netxen_nic_hw.h"
37
38#include "netxen_nic.h"
3d396eb1 39#include "netxen_nic_phan_reg.h"
3d396eb1 40
1494a814 41#include <linux/dma-mapping.h>
391587c3 42#include <linux/if_vlan.h>
c9bdd4b5 43#include <net/ip.h>
00977784 44#include <linux/ipv6.h>
1494a814 45
3d396eb1
AK		 46MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
47MODULE_LICENSE("GPL");
48MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
49
ceded32f 50char netxen_nic_driver_name[] = "netxen_nic";
3d396eb1 51static char netxen_nic_driver_string[] = "NetXen Network Driver version "
cb8011ad 52 NETXEN_NIC_LINUX_VERSIONID;
3d396eb1 53
2956640d
DP		 54static int port_mode = NETXEN_PORT_MODE_AUTO_NEG;
55
56/* Default to restricted 1G auto-neg mode */
57static int wol_port_mode = 5;
58
59static int use_msi = 1;
60
61static int use_msi_x = 1;
62
3d396eb1
AK		 63/* Local functions to NetXen NIC driver */
64static int __devinit netxen_nic_probe(struct pci_dev *pdev,
2956640d 65 const struct pci_device_id *ent);
3d396eb1
AK		 66static void __devexit netxen_nic_remove(struct pci_dev *pdev);
67static int netxen_nic_open(struct net_device *netdev);
68static int netxen_nic_close(struct net_device *netdev);
69static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
70static void netxen_tx_timeout(struct net_device *netdev);
6d5aefb8 71static void netxen_tx_timeout_task(struct work_struct *work);
3d396eb1 72static void netxen_watchdog(unsigned long);
bea3348e 73static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 74#ifdef CONFIG_NET_POLL_CONTROLLER
75static void netxen_nic_poll_controller(struct net_device *netdev);
76#endif
1494a814 77static irqreturn_t netxen_intr(int irq, void *data);
05aaa02d 78static irqreturn_t netxen_msi_intr(int irq, void *data);
b3df68f8 79static irqreturn_t netxen_msix_intr(int irq, void *data);
3d396eb1
AK		 80
81/* PCI Device ID Table */
70081ac5 82#define ENTRY(device) \
040dec3b 83 {PCI_DEVICE(PCI_VENDOR_ID_NETXEN, (device)), \
70081ac5
AV		 84 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
85
3d396eb1 86static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
040dec3b
DP		 87 ENTRY(PCI_DEVICE_ID_NX2031_10GXSR),
88 ENTRY(PCI_DEVICE_ID_NX2031_10GCX4),
89 ENTRY(PCI_DEVICE_ID_NX2031_4GCU),
90 ENTRY(PCI_DEVICE_ID_NX2031_IMEZ),
91 ENTRY(PCI_DEVICE_ID_NX2031_HMEZ),
92 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT),
93 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT2),
94 ENTRY(PCI_DEVICE_ID_NX3031),
3d396eb1
AK		 95 {0,}
96};
97
98MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
99
b1555130
AB		 100/*
101 * In netxen_nic_down(), we must wait for any pending callback requests into
102 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
103 * reenabled right after it is deleted in netxen_nic_down().
104 * FLUSH_SCHEDULED_WORK() does this synchronization.
105 *
106 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
107 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
108 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
109 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
110 * linkwatch_event() to be executed which also attempts to acquire the rtnl
111 * lock thus causing a deadlock.
112 */
113
114static struct workqueue_struct *netxen_workq;
115#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
116#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
117
ed25ffa1
AK		 118static void netxen_watchdog(unsigned long);
119
7830b22c
DP		 120static uint32_t crb_cmd_producer[4] = {
121 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
122 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
123};
124
c9fc891f 125void
3ce06a32
DP		 126netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
127 uint32_t crb_producer)
3176ff3e 128{
3ce06a32
DP		 129 adapter->pci_write_normalize(adapter,
130 adapter->crb_addr_cmd_producer, crb_producer);
3176ff3e
MT		 131}
132
7830b22c
DP		 133static uint32_t crb_cmd_consumer[4] = {
134 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
135 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
136};
137
3ce06a32
DP		 138static inline void
139netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
140 u32 crb_consumer)
3176ff3e 141{
3ce06a32
DP		 142 adapter->pci_write_normalize(adapter,
143 adapter->crb_addr_cmd_consumer, crb_consumer);
3176ff3e
MT		 144}
145
2956640d 146static uint32_t msi_tgt_status[8] = {
443be796 147 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
2956640d
DP		 148 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
149 ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
150 ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
443be796
DP		 151};
152
2956640d
DP		 153static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
154
092bc571 155static inline void netxen_nic_disable_int(struct netxen_adapter *adapter)
4638aef1 156{
092bc571 157 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0);
4638aef1
SH		 158}
159
092bc571 160static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
4638aef1 161{
48bfd1e0 162 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0x1);
4638aef1 163
092bc571
DP		 164 if (!NETXEN_IS_MSI_FAMILY(adapter))
165 adapter->pci_write_immediate(adapter,
166 adapter->legacy_intr.tgt_mask_reg, 0xfbff);
4638aef1
SH		 167}
168
2956640d
DP		 169static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
170{
171 struct pci_dev *pdev = adapter->pdev;
172 int err;
173 uint64_t mask;
174
175#ifdef CONFIG_IA64
176 adapter->dma_mask = DMA_32BIT_MASK;
177#else
178 if (revision_id >= NX_P3_B0) {
179 /* should go to DMA_64BIT_MASK */
180 adapter->dma_mask = DMA_39BIT_MASK;
181 mask = DMA_39BIT_MASK;
182 } else if (revision_id == NX_P3_A2) {
183 adapter->dma_mask = DMA_39BIT_MASK;
184 mask = DMA_39BIT_MASK;
185 } else if (revision_id == NX_P2_C1) {
186 adapter->dma_mask = DMA_35BIT_MASK;
187 mask = DMA_35BIT_MASK;
188 } else {
189 adapter->dma_mask = DMA_32BIT_MASK;
190 mask = DMA_32BIT_MASK;
191 goto set_32_bit_mask;
192 }
193
194 /*
195 * Consistent DMA mask is set to 32 bit because it cannot be set to
196 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
197 * come off this pool.
198 */
199 if (pci_set_dma_mask(pdev, mask) == 0 &&
200 pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
201 adapter->pci_using_dac = 1;
202 return 0;
203 }
354b45ff 204set_32_bit_mask:
2956640d
DP		 205#endif /* CONFIG_IA64 */
206
2956640d
DP		 207 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
208 if (!err)
209 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
210 if (err) {
211 DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
212 return err;
213 }
214
215 adapter->pci_using_dac = 0;
216 return 0;
217}
218
219static void netxen_check_options(struct netxen_adapter *adapter)
220{
221 switch (adapter->ahw.boardcfg.board_type) {
222 case NETXEN_BRDTYPE_P3_HMEZ:
223 case NETXEN_BRDTYPE_P3_XG_LOM:
224 case NETXEN_BRDTYPE_P3_10G_CX4:
225 case NETXEN_BRDTYPE_P3_10G_CX4_LP:
226 case NETXEN_BRDTYPE_P3_IMEZ:
227 case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
a70f9393
DP		 228 case NETXEN_BRDTYPE_P3_10G_SFP_QT:
229 case NETXEN_BRDTYPE_P3_10G_SFP_CT:
2956640d
DP		 230 case NETXEN_BRDTYPE_P3_10G_XFP:
231 case NETXEN_BRDTYPE_P3_10000_BASE_T:
232 adapter->msix_supported = !!use_msi_x;
233 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
234 break;
235
236 case NETXEN_BRDTYPE_P2_SB31_10G:
237 case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
238 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
239 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
240 adapter->msix_supported = 0;
241 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
242 break;
243
244 case NETXEN_BRDTYPE_P3_REF_QG:
245 case NETXEN_BRDTYPE_P3_4_GB:
246 case NETXEN_BRDTYPE_P3_4_GB_MM:
ec68db69 247 adapter->msix_supported = !!use_msi_x;
c7860a2a 248 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
a70f9393
DP		 249 break;
250
2956640d
DP		 251 case NETXEN_BRDTYPE_P2_SB35_4G:
252 case NETXEN_BRDTYPE_P2_SB31_2G:
253 adapter->msix_supported = 0;
254 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
255 break;
256
c7860a2a
DP		 257 case NETXEN_BRDTYPE_P3_10G_TP:
258 adapter->msix_supported = !!use_msi_x;
259 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
260 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
261 else
262 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
263 break;
264
2956640d
DP		 265 default:
266 adapter->msix_supported = 0;
267 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
268
269 printk(KERN_WARNING "Unknown board type(0x%x)\n",
270 adapter->ahw.boardcfg.board_type);
271 break;
272 }
273
274 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
275 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
276 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
277
278 adapter->max_possible_rss_rings = 1;
279 return;
280}
281
282static int
283netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
284{
27c915a4 285 u32 val, timeout;
2956640d
DP		 286
287 if (first_boot == 0x55555555) {
288 /* This is the first boot after power up */
27c915a4
DP		 289 adapter->pci_write_normalize(adapter,
290 NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
291
292 if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
293 return 0;
2956640d
DP		 294
295 /* PCI bus master workaround */
296 adapter->hw_read_wx(adapter,
297 NETXEN_PCIE_REG(0x4), &first_boot, 4);
298 if (!(first_boot & 0x4)) {
299 first_boot |= 0x4;
300 adapter->hw_write_wx(adapter,
301 NETXEN_PCIE_REG(0x4), &first_boot, 4);
302 adapter->hw_read_wx(adapter,
303 NETXEN_PCIE_REG(0x4), &first_boot, 4);
304 }
305
306 /* This is the first boot after power up */
307 adapter->hw_read_wx(adapter,
308 NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
309 if (first_boot != 0x80000f) {
310 /* clear the register for future unloads/loads */
311 adapter->pci_write_normalize(adapter,
312 NETXEN_CAM_RAM(0x1fc), 0);
27c915a4 313 return -EIO;
2956640d
DP		 314 }
315
27c915a4
DP		 316 /* Start P2 boot loader */
317 val = adapter->pci_read_normalize(adapter,
318 NETXEN_ROMUSB_GLB_PEGTUNE_DONE);
319 adapter->pci_write_normalize(adapter,
320 NETXEN_ROMUSB_GLB_PEGTUNE_DONE, val | 0x1);
321 timeout = 0;
322 do {
323 msleep(1);
324 val = adapter->pci_read_normalize(adapter,
325 NETXEN_CAM_RAM(0x1fc));
326
327 if (++timeout > 5000)
328 return -EIO;
329
330 } while (val == NETXEN_BDINFO_MAGIC);
2956640d 331 }
27c915a4 332 return 0;
2956640d
DP		 333}
334
335static void netxen_set_port_mode(struct netxen_adapter *adapter)
336{
337 u32 val, data;
338
339 val = adapter->ahw.boardcfg.board_type;
340 if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
341 (val == NETXEN_BRDTYPE_P3_XG_LOM)) {
342 if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
343 data = NETXEN_PORT_MODE_802_3_AP;
344 adapter->hw_write_wx(adapter,
345 NETXEN_PORT_MODE_ADDR, &data, 4);
346 } else if (port_mode == NETXEN_PORT_MODE_XG) {
347 data = NETXEN_PORT_MODE_XG;
348 adapter->hw_write_wx(adapter,
349 NETXEN_PORT_MODE_ADDR, &data, 4);
350 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
351 data = NETXEN_PORT_MODE_AUTO_NEG_1G;
352 adapter->hw_write_wx(adapter,
353 NETXEN_PORT_MODE_ADDR, &data, 4);
354 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
355 data = NETXEN_PORT_MODE_AUTO_NEG_XG;
356 adapter->hw_write_wx(adapter,
357 NETXEN_PORT_MODE_ADDR, &data, 4);
358 } else {
359 data = NETXEN_PORT_MODE_AUTO_NEG;
360 adapter->hw_write_wx(adapter,
361 NETXEN_PORT_MODE_ADDR, &data, 4);
362 }
363
364 if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
365 (wol_port_mode != NETXEN_PORT_MODE_XG) &&
366 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
367 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
368 wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
369 }
370 adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
371 &wol_port_mode, 4);
372 }
373}
374
2956640d
DP		 375static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
376{
377 u32 control;
378 int pos;
379
380 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
381 if (pos) {
382 pci_read_config_dword(pdev, pos, &control);
383 if (enable)
384 control |= PCI_MSIX_FLAGS_ENABLE;
385 else
386 control = 0;
387 pci_write_config_dword(pdev, pos, control);
388 }
389}
390
391static void netxen_init_msix_entries(struct netxen_adapter *adapter)
392{
393 int i;
394
395 for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
396 adapter->msix_entries[i].entry = i;
397}
398
9dc28efe
DP		 399static int
400netxen_read_mac_addr(struct netxen_adapter *adapter)
401{
402 int i;
403 unsigned char *p;
404 __le64 mac_addr;
9dc28efe
DP		 405 struct net_device *netdev = adapter->netdev;
406 struct pci_dev *pdev = adapter->pdev;
407
408 if (netxen_is_flash_supported(adapter) != 0)
409 return -EIO;
410
411 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
412 if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
413 return -EIO;
414 } else {
415 if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
416 return -EIO;
417 }
418
419 p = (unsigned char *)&mac_addr;
420 for (i = 0; i < 6; i++)
421 netdev->dev_addr[i] = *(p + 5 - i);
422
423 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
424
425 /* set station address */
426
e174961c
JB		 427 if (!is_valid_ether_addr(netdev->perm_addr))
428 dev_warn(&pdev->dev, "Bad MAC address %pM.\n", netdev->dev_addr);
429 else
9dc28efe
DP		 430 adapter->macaddr_set(adapter, netdev->dev_addr);
431
432 return 0;
433}
434
1abd266f
SH		 435static void netxen_set_multicast_list(struct net_device *dev)
436{
437 struct netxen_adapter *adapter = netdev_priv(dev);
438
439 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
440 netxen_p3_nic_set_multi(dev);
441 else
442 netxen_p2_nic_set_multi(dev);
443}
444
445static const struct net_device_ops netxen_netdev_ops = {
446 .ndo_open = netxen_nic_open,
447 .ndo_stop = netxen_nic_close,
448 .ndo_start_xmit = netxen_nic_xmit_frame,
449 .ndo_get_stats = netxen_nic_get_stats,
450 .ndo_validate_addr = eth_validate_addr,
451 .ndo_set_multicast_list = netxen_set_multicast_list,
452 .ndo_set_mac_address = netxen_nic_set_mac,
453 .ndo_change_mtu = netxen_nic_change_mtu,
454 .ndo_tx_timeout = netxen_tx_timeout,
455#ifdef CONFIG_NET_POLL_CONTROLLER
456 .ndo_poll_controller = netxen_nic_poll_controller,
457#endif
458};
459
3d396eb1
AK		 460/*
461 * netxen_nic_probe()
462 *
463 * The Linux system will invoke this after identifying the vendor ID and
464 * device Id in the pci_tbl supported by this module.
465 *
466 * A quad port card has one operational PCI config space, (function 0),
467 * which is used to access all four ports.
468 *
469 * This routine will initialize the adapter, and setup the global parameters
470 * along with the port's specific structure.
471 */
472static int __devinit
473netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
474{
475 struct net_device *netdev = NULL;
476 struct netxen_adapter *adapter = NULL;
ed25ffa1
AK		 477 void __iomem *mem_ptr0 = NULL;
478 void __iomem *mem_ptr1 = NULL;
479 void __iomem *mem_ptr2 = NULL;
6c80b18d
MT		 480 unsigned long first_page_group_end;
481 unsigned long first_page_group_start;
482
cb8011ad 483
a608ab9c 484 u8 __iomem *db_ptr = NULL;
ef38fa77 485 unsigned long mem_base, mem_len, db_base, db_len = 0, pci_len0 = 0;
2956640d
DP		 486 int i = 0, err;
487 int first_driver, first_boot;
6c80b18d 488 u32 val;
3176ff3e 489 int pci_func_id = PCI_FUNC(pdev->devfn);
2956640d
DP		 490 struct netxen_legacy_intr_set *legacy_intrp;
491 uint8_t revision_id;
3d396eb1 492
dcd56fdb 493 if (pci_func_id == 0)
2956640d 494 printk(KERN_INFO "%s\n", netxen_nic_driver_string);
6c80b18d 495
3176ff3e 496 if (pdev->class != 0x020000) {
dcd56fdb 497 printk(KERN_DEBUG "NetXen function %d, class %x will not "
3176ff3e 498 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 499 return -ENODEV;
500 }
2956640d 501
11d89d63
DP		 502 if (pdev->revision >= NX_P3_A0 && pdev->revision < NX_P3_B1) {
503 printk(KERN_WARNING "NetXen chip revisions between 0x%x-0x%x"
504 "will not be enabled.\n",
505 NX_P3_A0, NX_P3_B1);
506 return -ENODEV;
507 }
508
3d396eb1
AK		 509 if ((err = pci_enable_device(pdev)))
510 return err;
2956640d 511
3d396eb1
AK		 512 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
513 err = -ENODEV;
514 goto err_out_disable_pdev;
515 }
516
517 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
518 goto err_out_disable_pdev;
519
520 pci_set_master(pdev);
3176ff3e
MT		 521
522 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
523 if(!netdev) {
524 printk(KERN_ERR"%s: Failed to allocate memory for the "
525 "device block.Check system memory resource"
526 " usage.\n", netxen_nic_driver_name);
527 goto err_out_free_res;
528 }
529
3176ff3e
MT		 530 SET_NETDEV_DEV(netdev, &pdev->dev);
531
4cf1653a 532 adapter = netdev_priv(netdev);
2956640d
DP		 533 adapter->netdev = netdev;
534 adapter->pdev = pdev;
13ba9c77 535 adapter->ahw.pci_func = pci_func_id;
2956640d
DP		 536
537 revision_id = pdev->revision;
538 adapter->ahw.revision_id = revision_id;
539
540 err = nx_set_dma_mask(adapter, revision_id);
541 if (err)
542 goto err_out_free_netdev;
543
3ce06a32
DP		 544 rwlock_init(&adapter->adapter_lock);
545 adapter->ahw.qdr_sn_window = -1;
546 adapter->ahw.ddr_mn_window = -1;
13ba9c77 547
3d396eb1
AK		 548 /* remap phys address */
549 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
550 mem_len = pci_resource_len(pdev, 0);
3ce06a32
DP		 551 pci_len0 = 0;
552
553 adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
554 adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
555 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
556 adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
557 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
558 adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
559 adapter->pci_set_window = netxen_nic_pci_set_window_128M;
560 adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
561 adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
3d396eb1
AK		 562
563 /* 128 Meg of memory */
6c80b18d
MT		 564 if (mem_len == NETXEN_PCI_128MB_SIZE) {
565 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
566 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
567 SECOND_PAGE_GROUP_SIZE);
568 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
569 THIRD_PAGE_GROUP_SIZE);
570 first_page_group_start = FIRST_PAGE_GROUP_START;
571 first_page_group_end = FIRST_PAGE_GROUP_END;
572 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
573 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
574 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
575 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
576 first_page_group_start = 0;
577 first_page_group_end = 0;
3ce06a32
DP		 578 } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
579 adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
580 adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
581 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
582 adapter->pci_write_immediate =
583 netxen_nic_pci_write_immediate_2M;
584 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
585 adapter->pci_write_normalize =
586 netxen_nic_pci_write_normalize_2M;
587 adapter->pci_set_window = netxen_nic_pci_set_window_2M;
588 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
589 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
590
028e1415
DP		 591 mem_ptr0 = pci_ioremap_bar(pdev, 0);
592 if (mem_ptr0 == NULL) {
593 dev_err(&pdev->dev, "failed to map PCI bar 0\n");
594 return -EIO;
595 }
596
3ce06a32
DP		 597 pci_len0 = mem_len;
598 first_page_group_start = 0;
599 first_page_group_end = 0;
600
601 adapter->ahw.ddr_mn_window = 0;
602 adapter->ahw.qdr_sn_window = 0;
603
604 adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
605 (pci_func_id * 0x20);
606 adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
607 if (pci_func_id < 4)
608 adapter->ahw.ms_win_crb += (pci_func_id * 0x20);
609 else
610 adapter->ahw.ms_win_crb +=
611 0xA0 + ((pci_func_id - 4) * 0x10);
6c80b18d 612 } else {
4790654c 613 err = -EIO;
6c80b18d
MT		 614 goto err_out_free_netdev;
615 }
cb8011ad 616
3ce06a32 617 dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
cb8011ad 618
ef38fa77
DP		 619 if (NX_IS_REVISION_P3(revision_id))
620 goto skip_doorbell;
621
ed25ffa1
AK		 622 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
623 db_len = pci_resource_len(pdev, 4);
624
625 if (db_len == 0) {
626 printk(KERN_ERR "%s: doorbell is disabled\n",
2956640d 627 netxen_nic_driver_name);
ed25ffa1
AK		 628 err = -EIO;
629 goto err_out_iounmap;
630 }
ed25ffa1
AK		 631
632 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
a608ab9c 633 if (!db_ptr) {
ed25ffa1 634 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
2956640d 635 netxen_nic_driver_name);
ed25ffa1
AK		 636 err = -EIO;
637 goto err_out_iounmap;
3d396eb1
AK		 638 }
639
ef38fa77 640skip_doorbell:
6c80b18d 641 adapter->ahw.pci_base0 = mem_ptr0;
3ce06a32 642 adapter->ahw.pci_len0 = pci_len0;
6c80b18d
MT		 643 adapter->ahw.first_page_group_start = first_page_group_start;
644 adapter->ahw.first_page_group_end = first_page_group_end;
645 adapter->ahw.pci_base1 = mem_ptr1;
646 adapter->ahw.pci_base2 = mem_ptr2;
647 adapter->ahw.db_base = db_ptr;
648 adapter->ahw.db_len = db_len;
3d396eb1 649
bea3348e 650 netif_napi_add(netdev, &adapter->napi,
2956640d
DP		 651 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
652
653 if (revision_id >= NX_P3_B0)
654 legacy_intrp = &legacy_intr[pci_func_id];
655 else
656 legacy_intrp = &legacy_intr[0];
657
658 adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
659 adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
660 adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
661 adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
bea3348e 662
2d1a3bbd 663 /* this will be read from FW later */
664 adapter->intr_scheme = -1;
443be796 665 adapter->msi_mode = -1;
2d1a3bbd 666
667 /* This will be reset for mezz cards */
3176ff3e 668 adapter->portnum = pci_func_id;
2d1a3bbd 669 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 670 adapter->rx_csum = 1;
623621b0 671 adapter->mc_enabled = 0;
83821a07 672 if (NX_IS_REVISION_P3(revision_id))
2956640d 673 adapter->max_mc_count = 38;
83821a07 674 else
2956640d 675 adapter->max_mc_count = 16;
3176ff3e 676
1abd266f 677 netdev->netdev_ops = &netxen_netdev_ops;
05aaa02d 678 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 679
680 netxen_nic_change_mtu(netdev, netdev->mtu);
681
682 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
1abd266f 683
cdff1036
DP		 684 netdev->features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
685 netdev->vlan_features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
686
cd1f8160 687 if (NX_IS_REVISION_P3(revision_id)) {
cdff1036
DP		 688 netdev->features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
689 netdev->vlan_features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
cd1f8160 690 }
3176ff3e 691
cdff1036 692 if (adapter->pci_using_dac) {
3176ff3e 693 netdev->features |= NETIF_F_HIGHDMA;
cdff1036
DP		 694 netdev->vlan_features |= NETIF_F_HIGHDMA;
695 }
3176ff3e 696
6c80b18d
MT		 697 /*
698 * Set the CRB window to invalid. If any register in window 0 is
699 * accessed it should set the window to 0 and then reset it to 1.
700 */
701 adapter->curr_window = 255;
702
dcd56fdb
DP		 703 if (netxen_nic_get_board_info(adapter) != 0) {
704 printk("%s: Error getting board config info.\n",
2956640d 705 netxen_nic_driver_name);
dcd56fdb
DP		 706 err = -EIO;
707 goto err_out_iounmap;
708 }
6c80b18d 709
6c80b18d
MT		 710 netxen_initialize_adapter_ops(adapter);
711
13ba9c77 712 /* Mezz cards have PCI function 0,2,3 enabled */
dc515f2e
DP		 713 switch (adapter->ahw.boardcfg.board_type) {
714 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
715 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
716 if (pci_func_id >= 2)
13ba9c77 717 adapter->portnum = pci_func_id - 2;
dc515f2e
DP		 718 break;
719 default:
720 break;
721 }
13ba9c77 722
2956640d
DP		 723 /*
724 * This call will setup various max rx/tx counts.
725 * It must be done before any buffer/ring allocations.
726 */
727 netxen_check_options(adapter);
3d396eb1 728
2956640d
DP		 729 first_driver = 0;
730 if (NX_IS_REVISION_P3(revision_id)) {
731 if (adapter->ahw.pci_func == 0)
732 first_driver = 1;
733 } else {
734 if (adapter->portnum == 0)
735 first_driver = 1;
736 }
3d396eb1 737
2956640d
DP		 738 if (first_driver) {
739 first_boot = adapter->pci_read_normalize(adapter,
740 NETXEN_CAM_RAM(0x1fc));
3176ff3e 741
2956640d
DP		 742 err = netxen_check_hw_init(adapter, first_boot);
743 if (err) {
744 printk(KERN_ERR "%s: error in init HW init sequence\n",
745 netxen_nic_driver_name);
746 goto err_out_iounmap;
3176ff3e 747 }
3176ff3e 748
2956640d
DP		 749 if (NX_IS_REVISION_P3(revision_id))
750 netxen_set_port_mode(adapter);
751
752 if (first_boot != 0x55555555) {
3ce06a32
DP		 753 adapter->pci_write_normalize(adapter,
754 CRB_CMDPEG_STATE, 0);
439b454e
DP		 755 netxen_pinit_from_rom(adapter, 0);
756 msleep(1);
2956640d 757 }
27c915a4 758 netxen_load_firmware(adapter);
2956640d 759
2956640d 760 if (NX_IS_REVISION_P2(revision_id)) {
623621b0
DP		 761
762 /* Initialize multicast addr pool owners */
763 val = 0x7654;
764 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
765 val |= 0x0f000000;
766 netxen_crb_writelit_adapter(adapter,
767 NETXEN_MAC_ADDR_CNTL_REG, val);
768
6c80b18d 769 }
96acb6eb 770
2956640d
DP		 771 err = netxen_initialize_adapter_offload(adapter);
772 if (err)
773 goto err_out_iounmap;
6c80b18d
MT		 774
775 /*
776 * Tell the hardware our version number.
777 */
4790654c 778 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
6c80b18d
MT		 779 | ((_NETXEN_NIC_LINUX_MINOR << 8))
780 | (_NETXEN_NIC_LINUX_SUBVERSION);
3ce06a32 781 adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, i);
3d396eb1 782
3176ff3e 783 /* Handshake with the card before we register the devices. */
27c915a4
DP		 784 err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
785 if (err)
786 goto err_out_free_offload;
2956640d 787
2956640d
DP		 788 } /* first_driver */
789
790 netxen_nic_flash_print(adapter);
3d396eb1 791
d9e651bc
DP		 792 if (NX_IS_REVISION_P3(revision_id)) {
793 adapter->hw_read_wx(adapter,
794 NETXEN_MIU_MN_CONTROL, &val, 4);
795 adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
796 dev_info(&pdev->dev, "firmware running in %s mode\n",
797 adapter->ahw.cut_through ? "cut through" : "legacy");
798 }
799
3d396eb1 800 /*
6c80b18d 801 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 802 */
dcd56fdb 803 adapter->physical_port = adapter->portnum;
044fad0d
DP		 804 if (adapter->fw_major < 4) {
805 i = adapter->pci_read_normalize(adapter,
806 CRB_V2P(adapter->portnum));
807 if (i != 0x55555555)
808 adapter->physical_port = i;
809 }
6c80b18d 810
2956640d
DP		 811 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
812
813 netxen_set_msix_bit(pdev, 0);
814
815 if (NX_IS_REVISION_P3(revision_id)) {
816 if ((mem_len != NETXEN_PCI_128MB_SIZE) &&
817 mem_len != NETXEN_PCI_2MB_SIZE)
818 adapter->msix_supported = 0;
819 }
820
821 if (adapter->msix_supported) {
822
823 netxen_init_msix_entries(adapter);
824
825 if (pci_enable_msix(pdev, adapter->msix_entries,
826 MSIX_ENTRIES_PER_ADAPTER))
827 goto request_msi;
828
829 adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
830 netxen_set_msix_bit(pdev, 1);
831 dev_info(&pdev->dev, "using msi-x interrupts\n");
832
833 } else {
834request_msi:
835 if (use_msi && !pci_enable_msi(pdev)) {
836 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
837 dev_info(&pdev->dev, "using msi interrupts\n");
838 } else
839 dev_info(&pdev->dev, "using legacy interrupts\n");
840 }
841
842 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
843 netdev->irq = adapter->msix_entries[0].vector;
844 else
845 netdev->irq = pdev->irq;
846
847 err = netxen_receive_peg_ready(adapter);
848 if (err)
849 goto err_out_disable_msi;
850
851 init_timer(&adapter->watchdog_timer);
2956640d
DP		 852 adapter->watchdog_timer.function = &netxen_watchdog;
853 adapter->watchdog_timer.data = (unsigned long)adapter;
854 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
855 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
856
9dc28efe
DP		 857 err = netxen_read_mac_addr(adapter);
858 if (err)
859 dev_warn(&pdev->dev, "failed to read mac addr\n");
2956640d 860
3176ff3e
MT		 861 netif_carrier_off(netdev);
862 netif_stop_queue(netdev);
863
6c80b18d
MT		 864 if ((err = register_netdev(netdev))) {
865 printk(KERN_ERR "%s: register_netdev failed port #%d"
866 " aborting\n", netxen_nic_driver_name,
867 adapter->portnum);
868 err = -EIO;
2956640d 869 goto err_out_disable_msi;
6c80b18d
MT		 870 }
871
872 pci_set_drvdata(pdev, adapter);
3d396eb1 873
2956640d
DP		 874 switch (adapter->ahw.board_type) {
875 case NETXEN_NIC_GBE:
876 dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
877 adapter->netdev->name);
878 break;
879 case NETXEN_NIC_XGBE:
880 dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
881 adapter->netdev->name);
882 break;
3d396eb1 883 }
3d396eb1 884
2956640d
DP		 885 return 0;
886
887err_out_disable_msi:
888 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
889 pci_disable_msix(pdev);
6c80b18d
MT		 890 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
891 pci_disable_msi(pdev);
892
27c915a4 893err_out_free_offload:
2956640d
DP		 894 if (first_driver)
895 netxen_free_adapter_offload(adapter);
3d396eb1 896
2956640d 897err_out_iounmap:
ed25ffa1
AK		 898 if (db_ptr)
899 iounmap(db_ptr);
900
ed25ffa1
AK		 901 if (mem_ptr0)
902 iounmap(mem_ptr0);
903 if (mem_ptr1)
904 iounmap(mem_ptr1);
905 if (mem_ptr2)
906 iounmap(mem_ptr2);
cb8011ad 907
6c80b18d
MT		 908err_out_free_netdev:
909 free_netdev(netdev);
910
911err_out_free_res:
3d396eb1 912 pci_release_regions(pdev);
6c80b18d
MT		 913
914err_out_disable_pdev:
2956640d 915 pci_set_drvdata(pdev, NULL);
3d396eb1
AK		 916 pci_disable_device(pdev);
917 return err;
918}
919
920static void __devexit netxen_nic_remove(struct pci_dev *pdev)
921{
922 struct netxen_adapter *adapter;
3176ff3e 923 struct net_device *netdev;
3d396eb1 924
6c80b18d 925 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 926 if (adapter == NULL)
927 return;
928
6c80b18d
MT		 929 netdev = adapter->netdev;
930
96acb6eb
DP		 931 unregister_netdev(netdev);
932
96acb6eb 933 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
3d396eb1 934 netxen_free_hw_resources(adapter);
9e410778 935 netxen_release_rx_buffers(adapter);
2956640d 936 netxen_free_sw_resources(adapter);
06e9d9f9
DP		 937
938 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
939 netxen_p3_free_mac_list(adapter);
96acb6eb 940 }
3d396eb1 941
439b454e
DP		 942 if (adapter->portnum == 0)
943 netxen_free_adapter_offload(adapter);
96acb6eb 944
3052246c 945 if (adapter->irq)
946 free_irq(adapter->irq, adapter);
947
2956640d
DP		 948 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
949 pci_disable_msix(pdev);
3052246c 950 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
951 pci_disable_msi(pdev);
952
6c80b18d 953 iounmap(adapter->ahw.pci_base0);
ef38fa77
DP		 954 if (adapter->ahw.db_base != NULL)
955 iounmap(adapter->ahw.db_base);
3bfafd6b
DP		 956 if (adapter->ahw.pci_base1 != NULL)
957 iounmap(adapter->ahw.pci_base1);
958 if (adapter->ahw.pci_base2 != NULL)
959 iounmap(adapter->ahw.pci_base2);
595e3fb8
MT		 960
961 pci_release_regions(pdev);
3052246c 962 pci_disable_device(pdev);
595e3fb8
MT		 963 pci_set_drvdata(pdev, NULL);
964
6c80b18d 965 free_netdev(netdev);
3d396eb1
AK		 966}
967
968/*
969 * Called when a network interface is made active
970 * @returns 0 on success, negative value on failure
971 */
972static int netxen_nic_open(struct net_device *netdev)
973{
4cf1653a 974 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 975 int err = 0;
976 int ctx, ring;
05aaa02d
DP		 977 irq_handler_t handler;
978 unsigned long flags = IRQF_SAMPLE_RANDOM;
3d396eb1 979
dcd56fdb
DP		 980 if (adapter->driver_mismatch)
981 return -EIO;
982
3d396eb1
AK		 983 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
984 err = netxen_init_firmware(adapter);
985 if (err != 0) {
986 printk(KERN_ERR "Failed to init firmware\n");
987 return -EIO;
988 }
3d396eb1 989
83821a07
DP		 990 if (adapter->fw_major < 4)
991 adapter->max_rds_rings = 3;
992 else
993 adapter->max_rds_rings = 2;
994
2956640d 995 err = netxen_alloc_sw_resources(adapter);
3d396eb1 996 if (err) {
2956640d
DP		 997 printk(KERN_ERR "%s: Error in setting sw resources\n",
998 netdev->name);
3d396eb1
AK		 999 return err;
1000 }
2956640d
DP		 1001
1002 netxen_nic_clear_stats(adapter);
1003
1004 err = netxen_alloc_hw_resources(adapter);
1005 if (err) {
1006 printk(KERN_ERR "%s: Error in setting hw resources\n",
1007 netdev->name);
1008 goto err_out_free_sw;
1009 }
1010
092bc571
DP		 1011 if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) ||
1012 (adapter->intr_scheme != INTR_SCHEME_PERPORT)) {
1013 printk(KERN_ERR "%s: Firmware interrupt scheme is "
1014 "incompatible with driver\n",
1015 netdev->name);
1016 adapter->driver_mismatch = 1;
1017 goto err_out_free_hw;
1018 }
1019
2956640d
DP		 1020 if (adapter->fw_major < 4) {
1021 adapter->crb_addr_cmd_producer =
1022 crb_cmd_producer[adapter->portnum];
1023 adapter->crb_addr_cmd_consumer =
1024 crb_cmd_consumer[adapter->portnum];
2956640d 1025
83821a07
DP		 1026 netxen_nic_update_cmd_producer(adapter, 0);
1027 netxen_nic_update_cmd_consumer(adapter, 0);
1028 }
2956640d 1029
3d396eb1 1030 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
48bfd1e0 1031 for (ring = 0; ring < adapter->max_rds_rings; ring++)
3d396eb1 1032 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 1033 }
b3df68f8
DP		 1034 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
1035 handler = netxen_msix_intr;
1036 else if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
05aaa02d
DP		 1037 handler = netxen_msi_intr;
1038 else {
1039 flags |= IRQF_SHARED;
1040 handler = netxen_intr;
1041 }
2956640d 1042 adapter->irq = netdev->irq;
05aaa02d
DP		 1043 err = request_irq(adapter->irq, handler,
1044 flags, netdev->name, adapter);
3d396eb1
AK		 1045 if (err) {
1046 printk(KERN_ERR "request_irq failed with: %d\n", err);
9e410778 1047 goto err_out_free_rxbuf;
3d396eb1 1048 }
ed25ffa1
AK		 1049
1050 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
1051 }
2956640d 1052
3d396eb1
AK		 1053 /* Done here again so that even if phantom sw overwrote it,
1054 * we set it */
c9fc891f 1055 err = adapter->init_port(adapter, adapter->physical_port);
2956640d 1056 if (err) {
595e3fb8
MT		 1057 printk(KERN_ERR "%s: Failed to initialize port %d\n",
1058 netxen_nic_driver_name, adapter->portnum);
2956640d 1059 goto err_out_free_irq;
595e3fb8 1060 }
2956640d 1061 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 1062
3176ff3e 1063 netxen_nic_set_link_parameters(adapter);
3d396eb1 1064
1abd266f 1065 netxen_set_multicast_list(netdev);
9ad27643 1066 if (adapter->set_mtu)
c9fc891f 1067 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 1068
922c4f2c 1069 adapter->ahw.linkup = 0;
dcd56fdb 1070 mod_timer(&adapter->watchdog_timer, jiffies);
05aaa02d
DP		 1071
1072 napi_enable(&adapter->napi);
1073 netxen_nic_enable_int(adapter);
1074
dcd56fdb 1075 netif_start_queue(netdev);
3d396eb1
AK		 1076
1077 return 0;
2956640d
DP		 1078
1079err_out_free_irq:
1080 free_irq(adapter->irq, adapter);
9e410778
DP		 1081err_out_free_rxbuf:
1082 netxen_release_rx_buffers(adapter);
092bc571 1083err_out_free_hw:
2956640d
DP		 1084 netxen_free_hw_resources(adapter);
1085err_out_free_sw:
1086 netxen_free_sw_resources(adapter);
1087 return err;
3d396eb1
AK		 1088}
1089
1090/*
1091 * netxen_nic_close - Disables a network interface entry point
1092 */
1093static int netxen_nic_close(struct net_device *netdev)
1094{
3176ff3e 1095 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1096
1097 netif_carrier_off(netdev);
1098 netif_stop_queue(netdev);
bea3348e 1099 napi_disable(&adapter->napi);
3d396eb1 1100
72b0a7a8 1101 if (adapter->stop_port)
1102 adapter->stop_port(adapter);
1103
e01872af 1104 netxen_nic_disable_int(adapter);
1105
2956640d
DP		 1106 netxen_release_tx_buffers(adapter);
1107
922c4f2c
DP		 1108 FLUSH_SCHEDULED_WORK();
1109 del_timer_sync(&adapter->watchdog_timer);
3d396eb1
AK		 1110
1111 return 0;
1112}
1113
391587c3 1114static bool netxen_tso_check(struct net_device *netdev,
cd1f8160
DP		 1115 struct cmd_desc_type0 *desc, struct sk_buff *skb)
1116{
391587c3
DP		 1117 bool tso = false;
1118 u8 opcode = TX_ETHER_PKT;
cdff1036
DP		 1119 __be16 protocol = skb->protocol;
1120 u16 flags = 0;
1121
09640e63 1122 if (protocol == cpu_to_be16(ETH_P_8021Q)) {
cdff1036
DP		 1123 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)skb->data;
1124 protocol = vh->h_vlan_encapsulated_proto;
1125 flags = FLAGS_VLAN_TAGGED;
1126 }
cd1f8160 1127
391587c3
DP		 1128 if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
1129 skb_shinfo(skb)->gso_size > 0) {
1130
1131 desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1132 desc->total_hdr_length =
1133 skb_transport_offset(skb) + tcp_hdrlen(skb);
1134
09640e63 1135 opcode = (protocol == cpu_to_be16(ETH_P_IPV6)) ?
391587c3
DP		 1136 TX_TCP_LSO6 : TX_TCP_LSO;
1137 tso = true;
cd1f8160
DP		 1138
1139 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
391587c3
DP		 1140 u8 l4proto;
1141
09640e63 1142 if (protocol == cpu_to_be16(ETH_P_IP)) {
391587c3
DP		 1143 l4proto = ip_hdr(skb)->protocol;
1144
1145 if (l4proto == IPPROTO_TCP)
1146 opcode = TX_TCP_PKT;
1147 else if(l4proto == IPPROTO_UDP)
1148 opcode = TX_UDP_PKT;
09640e63 1149 } else if (protocol == cpu_to_be16(ETH_P_IPV6)) {
391587c3
DP		 1150 l4proto = ipv6_hdr(skb)->nexthdr;
1151
1152 if (l4proto == IPPROTO_TCP)
1153 opcode = TX_TCPV6_PKT;
1154 else if(l4proto == IPPROTO_UDP)
1155 opcode = TX_UDPV6_PKT;
1156 }
cd1f8160
DP		 1157 }
1158 desc->tcp_hdr_offset = skb_transport_offset(skb);
1159 desc->ip_hdr_offset = skb_network_offset(skb);
cdff1036 1160 netxen_set_tx_flags_opcode(desc, flags, opcode);
391587c3 1161 return tso;
cd1f8160
DP		 1162}
1163
6f703406
DP		 1164static void
1165netxen_clean_tx_dma_mapping(struct pci_dev *pdev,
1166 struct netxen_cmd_buffer *pbuf, int last)
1167{
1168 int k;
1169 struct netxen_skb_frag *buffrag;
1170
1171 buffrag = &pbuf->frag_array[0];
1172 pci_unmap_single(pdev, buffrag->dma,
1173 buffrag->length, PCI_DMA_TODEVICE);
1174
1175 for (k = 1; k < last; k++) {
1176 buffrag = &pbuf->frag_array[k];
1177 pci_unmap_page(pdev, buffrag->dma,
1178 buffrag->length, PCI_DMA_TODEVICE);
1179 }
1180}
1181
3d396eb1
AK		 1182static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1183{
3176ff3e 1184 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1185 struct netxen_hardware_context *hw = &adapter->ahw;
1186 unsigned int first_seg_len = skb->len - skb->data_len;
391587c3 1187 struct netxen_cmd_buffer *pbuf;
3d396eb1 1188 struct netxen_skb_frag *buffrag;
391587c3 1189 struct cmd_desc_type0 *hwdesc;
6f703406
DP		 1190 struct pci_dev *pdev = adapter->pdev;
1191 dma_addr_t temp_dma;
391587c3 1192 int i, k;
3d396eb1 1193
ba53e6b4 1194 u32 producer, consumer;
391587c3 1195 int frag_count, no_of_desc;
ba53e6b4 1196 u32 num_txd = adapter->max_tx_desc_count;
391587c3 1197 bool is_tso = false;
3d396eb1 1198
3d396eb1
AK		 1199 frag_count = skb_shinfo(skb)->nr_frags + 1;
1200
3d396eb1
AK		 1201 /* There 4 fragments per descriptor */
1202 no_of_desc = (frag_count + 3) >> 2;
53a01e00 1203
ba53e6b4
DP		 1204 producer = adapter->cmd_producer;
1205 smp_mb();
1206 consumer = adapter->last_cmd_consumer;
1207 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
1208 netif_stop_queue(netdev);
1209 smp_mb();
1210 return NETDEV_TX_BUSY;
53a01e00 1211 }
3d396eb1 1212
3d396eb1 1213 /* Copy the descriptors into the hardware */
3d396eb1
AK		 1214 hwdesc = &hw->cmd_desc_head[producer];
1215 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1216 /* Take skb->data itself */
1217 pbuf = &adapter->cmd_buf_arr[producer];
391587c3
DP		 1218
1219 is_tso = netxen_tso_check(netdev, hwdesc, skb);
1220
3d396eb1 1221 pbuf->skb = skb;
3d396eb1 1222 pbuf->frag_count = frag_count;
3d396eb1 1223 buffrag = &pbuf->frag_array[0];
6f703406 1224 temp_dma = pci_map_single(pdev, skb->data, first_seg_len,
3d396eb1 1225 PCI_DMA_TODEVICE);
6f703406
DP		 1226 if (pci_dma_mapping_error(pdev, temp_dma))
1227 goto drop_packet;
1228
1229 buffrag->dma = temp_dma;
3d396eb1 1230 buffrag->length = first_seg_len;
391587c3
DP		 1231 netxen_set_tx_frags_len(hwdesc, frag_count, skb->len);
1232 netxen_set_tx_port(hwdesc, adapter->portnum);
3d396eb1 1233
3d396eb1
AK		 1234 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1235 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1236
1237 for (i = 1, k = 1; i < frag_count; i++, k++) {
1238 struct skb_frag_struct *frag;
1239 int len, temp_len;
1240 unsigned long offset;
3d396eb1
AK		 1241
1242 /* move to next desc. if there is a need */
1243 if ((i & 0x3) == 0) {
1244 k = 0;
ba53e6b4 1245 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1246 hwdesc = &hw->cmd_desc_head[producer];
1247 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 1248 pbuf = &adapter->cmd_buf_arr[producer];
1249 pbuf->skb = NULL;
3d396eb1
AK		 1250 }
1251 frag = &skb_shinfo(skb)->frags[i - 1];
1252 len = frag->size;
1253 offset = frag->page_offset;
1254
1255 temp_len = len;
6f703406 1256 temp_dma = pci_map_page(pdev, frag->page, offset,
3d396eb1 1257 len, PCI_DMA_TODEVICE);
6f703406
DP		 1258 if (pci_dma_mapping_error(pdev, temp_dma)) {
1259 netxen_clean_tx_dma_mapping(pdev, pbuf, i);
1260 goto drop_packet;
1261 }
3d396eb1
AK		 1262
1263 buffrag++;
1264 buffrag->dma = temp_dma;
1265 buffrag->length = temp_len;
1266
3d396eb1
AK		 1267 switch (k) {
1268 case 0:
1269 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1270 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1271 break;
1272 case 1:
1273 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1274 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1275 break;
1276 case 2:
1277 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1278 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1279 break;
1280 case 3:
a608ab9c 1281 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1282 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1283 break;
1284 }
1285 frag++;
1286 }
ba53e6b4 1287 producer = get_next_index(producer, num_txd);
3d396eb1 1288
3d396eb1
AK		 1289 /* For LSO, we need to copy the MAC/IP/TCP headers into
1290 * the descriptor ring
1291 */
391587c3 1292 if (is_tso) {
3d396eb1 1293 int hdr_len, first_hdr_len, more_hdr;
391587c3 1294 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ed25ffa1
AK		 1295 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1296 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1297 more_hdr = 1;
1298 } else {
1299 first_hdr_len = hdr_len;
1300 more_hdr = 0;
1301 }
1302 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1303 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1304 pbuf = &adapter->cmd_buf_arr[producer];
1305 pbuf->skb = NULL;
3d396eb1
AK		 1306
1307 /* copy the first 64 bytes */
ed25ffa1 1308 memcpy(((void *)hwdesc) + 2,
3d396eb1 1309 (void *)(skb->data), first_hdr_len);
ba53e6b4 1310 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1311
1312 if (more_hdr) {
1313 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1314 pbuf = &adapter->cmd_buf_arr[producer];
1315 pbuf->skb = NULL;
3d396eb1
AK		 1316 /* copy the next 64 bytes - should be enough except
1317 * for pathological case
1318 */
d626f62b
ACM		 1319 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1320 hwdesc,
1321 (hdr_len -
1322 first_hdr_len));
ba53e6b4 1323 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1324 }
1325 }
6c80b18d 1326
ba53e6b4 1327 adapter->cmd_producer = producer;
5dc16268 1328 adapter->stats.txbytes += skb->len;
6c80b18d 1329
ba53e6b4 1330 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
3d396eb1 1331
ba53e6b4 1332 adapter->stats.xmitcalled++;
3d396eb1
AK		 1333 netdev->trans_start = jiffies;
1334
3d396eb1 1335 return NETDEV_TX_OK;
6f703406
DP		 1336
1337drop_packet:
1338 adapter->stats.txdropped++;
1339 dev_kfree_skb_any(skb);
1340 return NETDEV_TX_OK;
3d396eb1
AK		 1341}
1342
a97342f9
DP		 1343static int netxen_nic_check_temp(struct netxen_adapter *adapter)
1344{
1345 struct net_device *netdev = adapter->netdev;
1346 uint32_t temp, temp_state, temp_val;
1347 int rv = 0;
1348
1349 temp = adapter->pci_read_normalize(adapter, CRB_TEMP_STATE);
1350
1351 temp_state = nx_get_temp_state(temp);
1352 temp_val = nx_get_temp_val(temp);
1353
1354 if (temp_state == NX_TEMP_PANIC) {
1355 printk(KERN_ALERT
1356 "%s: Device temperature %d degrees C exceeds"
1357 " maximum allowed. Hardware has been shut down.\n",
1358 netxen_nic_driver_name, temp_val);
1359
1360 netif_carrier_off(netdev);
1361 netif_stop_queue(netdev);
1362 rv = 1;
1363 } else if (temp_state == NX_TEMP_WARN) {
1364 if (adapter->temp == NX_TEMP_NORMAL) {
1365 printk(KERN_ALERT
1366 "%s: Device temperature %d degrees C "
1367 "exceeds operating range."
1368 " Immediate action needed.\n",
1369 netxen_nic_driver_name, temp_val);
1370 }
1371 } else {
1372 if (adapter->temp == NX_TEMP_WARN) {
1373 printk(KERN_INFO
1374 "%s: Device temperature is now %d degrees C"
1375 " in normal range.\n", netxen_nic_driver_name,
1376 temp_val);
1377 }
1378 }
1379 adapter->temp = temp_state;
1380 return rv;
1381}
1382
1383static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
1384{
1385 struct net_device *netdev = adapter->netdev;
1386 u32 val, port, linkup;
1387
1388 port = adapter->physical_port;
1389
24a7a455
DP		 1390 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1391 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE_P3);
1392 val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
1393 linkup = (val == XG_LINK_UP_P3);
c9fc891f 1394 } else {
24a7a455
DP		 1395 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE);
1396 if (adapter->ahw.board_type == NETXEN_NIC_GBE)
1397 linkup = (val >> port) & 1;
1398 else {
c9fc891f
DP		 1399 val = (val >> port*8) & 0xff;
1400 linkup = (val == XG_LINK_UP);
c9fc891f 1401 }
a97342f9
DP		 1402 }
1403
1404 if (adapter->ahw.linkup && !linkup) {
1405 printk(KERN_INFO "%s: %s NIC Link is down\n",
1406 netxen_nic_driver_name, netdev->name);
1407 adapter->ahw.linkup = 0;
1408 if (netif_running(netdev)) {
1409 netif_carrier_off(netdev);
1410 netif_stop_queue(netdev);
1411 }
c7860a2a
DP		 1412
1413 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1414 } else if (!adapter->ahw.linkup && linkup) {
1415 printk(KERN_INFO "%s: %s NIC Link is up\n",
1416 netxen_nic_driver_name, netdev->name);
1417 adapter->ahw.linkup = 1;
1418 if (netif_running(netdev)) {
1419 netif_carrier_on(netdev);
1420 netif_wake_queue(netdev);
1421 }
c7860a2a
DP		 1422
1423 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1424 }
1425}
1426
3d396eb1
AK		 1427static void netxen_watchdog(unsigned long v)
1428{
1429 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1430
1431 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1432}
1433
a97342f9
DP		 1434void netxen_watchdog_task(struct work_struct *work)
1435{
1436 struct netxen_adapter *adapter =
1437 container_of(work, struct netxen_adapter, watchdog_task);
1438
1439 if ((adapter->portnum == 0) && netxen_nic_check_temp(adapter))
1440 return;
1441
1442 netxen_nic_handle_phy_intr(adapter);
1443
922c4f2c
DP		 1444 if (netif_running(adapter->netdev))
1445 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
a97342f9
DP		 1446}
1447
3d396eb1
AK		 1448static void netxen_tx_timeout(struct net_device *netdev)
1449{
3176ff3e
MT		 1450 struct netxen_adapter *adapter = (struct netxen_adapter *)
1451 netdev_priv(netdev);
1452 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1453}
1454
6d5aefb8 1455static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1456{
4790654c 1457 struct netxen_adapter *adapter =
3176ff3e 1458 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1459
1460 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1461 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1462
ba53e6b4
DP		 1463 netxen_nic_disable_int(adapter);
1464 napi_disable(&adapter->napi);
1465
6c80b18d 1466 adapter->netdev->trans_start = jiffies;
ba53e6b4
DP		 1467
1468 napi_enable(&adapter->napi);
1469 netxen_nic_enable_int(adapter);
6c80b18d 1470 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1471}
1472
a97342f9
DP		 1473/*
1474 * netxen_nic_get_stats - Get System Network Statistics
1475 * @netdev: network interface device structure
1476 */
1477struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
1478{
1479 struct netxen_adapter *adapter = netdev_priv(netdev);
1480 struct net_device_stats *stats = &adapter->net_stats;
1481
1482 memset(stats, 0, sizeof(*stats));
1483
1484 /* total packets received */
1485 stats->rx_packets = adapter->stats.no_rcv;
1486 /* total packets transmitted */
1487 stats->tx_packets = adapter->stats.xmitedframes +
1488 adapter->stats.xmitfinished;
1489 /* total bytes received */
1490 stats->rx_bytes = adapter->stats.rxbytes;
1491 /* total bytes transmitted */
1492 stats->tx_bytes = adapter->stats.txbytes;
1493 /* bad packets received */
1494 stats->rx_errors = adapter->stats.rcvdbadskb;
1495 /* packet transmit problems */
1496 stats->tx_errors = adapter->stats.nocmddescriptor;
1497 /* no space in linux buffers */
1498 stats->rx_dropped = adapter->stats.rxdropped;
1499 /* no space available in linux */
1500 stats->tx_dropped = adapter->stats.txdropped;
1501
1502 return stats;
1503}
1504
e4c93c81 1505static irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1506{
1daec86a 1507 struct netxen_adapter *adapter = data;
d71e1be8
DP		 1508 u32 status = 0;
1509
1510 status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1511
1512 if (!(status & adapter->legacy_intr.int_vec_bit))
05aaa02d 1513 return IRQ_NONE;
e01872af 1514
d71e1be8
DP		 1515 if (adapter->ahw.revision_id >= NX_P3_B1) {
1516 /* check interrupt state machine, to be sure */
1517 status = adapter->pci_read_immediate(adapter,
1518 ISR_INT_STATE_REG);
1519 if (!ISR_LEGACY_INT_TRIGGERED(status))
1520 return IRQ_NONE;
1521
092bc571
DP		 1522 } else {
1523 unsigned long our_int = 0;
d71e1be8
DP		 1524
1525 our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
092bc571 1526
d71e1be8 1527 /* not our interrupt */
092bc571 1528 if (!test_and_clear_bit((7 + adapter->portnum), &our_int))
d71e1be8
DP		 1529 return IRQ_NONE;
1530
092bc571
DP		 1531 /* claim interrupt */
1532 adapter->pci_write_normalize(adapter,
1533 CRB_INT_VECTOR, (our_int & 0xffffffff));
e01872af 1534 }
1535
092bc571
DP		 1536 /* clear interrupt */
1537 if (adapter->fw_major < 4)
1538 netxen_nic_disable_int(adapter);
1539
1540 adapter->pci_write_immediate(adapter,
1541 adapter->legacy_intr.tgt_status_reg,
1542 0xffffffff);
1543 /* read twice to ensure write is flushed */
1544 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1545 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1546
1547 napi_schedule(&adapter->napi);
3d396eb1
AK		 1548
1549 return IRQ_HANDLED;
1550}
1551
e4c93c81 1552static irqreturn_t netxen_msi_intr(int irq, void *data)
05aaa02d
DP		 1553{
1554 struct netxen_adapter *adapter = data;
1555
092bc571
DP		 1556 /* clear interrupt */
1557 adapter->pci_write_immediate(adapter,
1558 msi_tgt_status[adapter->ahw.pci_func], 0xffffffff);
1559
1560 napi_schedule(&adapter->napi);
05aaa02d
DP		 1561 return IRQ_HANDLED;
1562}
1563
b3df68f8
DP		 1564static irqreturn_t netxen_msix_intr(int irq, void *data)
1565{
1566 struct netxen_adapter *adapter = data;
1567
1568 napi_schedule(&adapter->napi);
1569 return IRQ_HANDLED;
1570}
1571
bea3348e 1572static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1573{
bea3348e 1574 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
05aaa02d 1575 int tx_complete;
3d396eb1 1576 int ctx;
bea3348e 1577 int work_done;
3d396eb1 1578
05aaa02d 1579 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1580
80922fbc 1581 work_done = 0;
3d396eb1
AK		 1582 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1583 /*
1584 * Fairness issue. This will give undue weight to the
1585 * receive context 0.
1586 */
1587
1588 /*
1589 * To avoid starvation, we give each of our receivers,
1590 * a fraction of the quota. Sometimes, it might happen that we
1591 * have enough quota to process every packet, but since all the
1592 * packets are on one context, it gets only half of the quota,
1593 * and ends up not processing it.
1594 */
bea3348e
SH		 1595 work_done += netxen_process_rcv_ring(adapter, ctx,
1596 budget / MAX_RCV_CTX);
3d396eb1
AK		 1597 }
1598
05aaa02d 1599 if ((work_done < budget) && tx_complete) {
288379f0 1600 napi_complete(&adapter->napi);
3d396eb1
AK		 1601 netxen_nic_enable_int(adapter);
1602 }
1603
bea3348e 1604 return work_done;
3d396eb1
AK		 1605}
1606
1607#ifdef CONFIG_NET_POLL_CONTROLLER
1608static void netxen_nic_poll_controller(struct net_device *netdev)
1609{
3176ff3e 1610 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1611 disable_irq(adapter->irq);
1494a814 1612 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1613 enable_irq(adapter->irq);
1614}
1615#endif
3d396eb1
AK		 1616
1617static struct pci_driver netxen_driver = {
1618 .name = netxen_nic_driver_name,
1619 .id_table = netxen_pci_tbl,
1620 .probe = netxen_nic_probe,
1621 .remove = __devexit_p(netxen_nic_remove)
1622};
1623
1624/* Driver Registration on NetXen card */
1625
1626static int __init netxen_init_module(void)
1627{
79ea13ce 1628 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1629 return -ENOMEM;
1630
184231bd 1631 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1632}
1633
1634module_init(netxen_init_module);
1635
1636static void __exit netxen_exit_module(void)
1637{
3d396eb1 1638 pci_unregister_driver(&netxen_driver);
9de06610 1639 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1640}
1641
1642module_exit(netxen_exit_module);
Linux kernel - Deliverables
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