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[net-next-2.6.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);
3d396eb1
AK		 79
80/* PCI Device ID Table */
70081ac5 81#define ENTRY(device) \
040dec3b 82 {PCI_DEVICE(PCI_VENDOR_ID_NETXEN, (device)), \
70081ac5
AV		 83 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
84
3d396eb1 85static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
040dec3b
DP		 86 ENTRY(PCI_DEVICE_ID_NX2031_10GXSR),
87 ENTRY(PCI_DEVICE_ID_NX2031_10GCX4),
88 ENTRY(PCI_DEVICE_ID_NX2031_4GCU),
89 ENTRY(PCI_DEVICE_ID_NX2031_IMEZ),
90 ENTRY(PCI_DEVICE_ID_NX2031_HMEZ),
91 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT),
92 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT2),
93 ENTRY(PCI_DEVICE_ID_NX3031),
3d396eb1
AK		 94 {0,}
95};
96
97MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
98
b1555130
AB		 99/*
100 * In netxen_nic_down(), we must wait for any pending callback requests into
101 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
102 * reenabled right after it is deleted in netxen_nic_down().
103 * FLUSH_SCHEDULED_WORK() does this synchronization.
104 *
105 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
106 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
107 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
108 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
109 * linkwatch_event() to be executed which also attempts to acquire the rtnl
110 * lock thus causing a deadlock.
111 */
112
113static struct workqueue_struct *netxen_workq;
114#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
115#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
116
ed25ffa1
AK		 117static void netxen_watchdog(unsigned long);
118
7830b22c
DP		 119static uint32_t crb_cmd_producer[4] = {
120 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
121 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
122};
123
c9fc891f 124void
3ce06a32
DP		 125netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
126 uint32_t crb_producer)
3176ff3e 127{
3ce06a32
DP		 128 adapter->pci_write_normalize(adapter,
129 adapter->crb_addr_cmd_producer, crb_producer);
3176ff3e
MT		 130}
131
7830b22c
DP		 132static uint32_t crb_cmd_consumer[4] = {
133 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
134 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
135};
136
3ce06a32
DP		 137static inline void
138netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
139 u32 crb_consumer)
3176ff3e 140{
3ce06a32
DP		 141 adapter->pci_write_normalize(adapter,
142 adapter->crb_addr_cmd_consumer, crb_consumer);
3176ff3e
MT		 143}
144
2956640d 145static uint32_t msi_tgt_status[8] = {
443be796 146 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
2956640d
DP		 147 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
148 ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
149 ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
443be796
DP		 150};
151
2956640d
DP		 152static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
153
092bc571 154static inline void netxen_nic_disable_int(struct netxen_adapter *adapter)
4638aef1 155{
092bc571 156 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0);
4638aef1
SH		 157}
158
092bc571 159static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
4638aef1 160{
48bfd1e0 161 adapter->pci_write_normalize(adapter, adapter->crb_intr_mask, 0x1);
4638aef1 162
092bc571
DP		 163 if (!NETXEN_IS_MSI_FAMILY(adapter))
164 adapter->pci_write_immediate(adapter,
165 adapter->legacy_intr.tgt_mask_reg, 0xfbff);
4638aef1
SH		 166}
167
2956640d
DP		 168static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
169{
170 struct pci_dev *pdev = adapter->pdev;
171 int err;
172 uint64_t mask;
173
174#ifdef CONFIG_IA64
175 adapter->dma_mask = DMA_32BIT_MASK;
176#else
177 if (revision_id >= NX_P3_B0) {
178 /* should go to DMA_64BIT_MASK */
179 adapter->dma_mask = DMA_39BIT_MASK;
180 mask = DMA_39BIT_MASK;
181 } else if (revision_id == NX_P3_A2) {
182 adapter->dma_mask = DMA_39BIT_MASK;
183 mask = DMA_39BIT_MASK;
184 } else if (revision_id == NX_P2_C1) {
185 adapter->dma_mask = DMA_35BIT_MASK;
186 mask = DMA_35BIT_MASK;
187 } else {
188 adapter->dma_mask = DMA_32BIT_MASK;
189 mask = DMA_32BIT_MASK;
190 goto set_32_bit_mask;
191 }
192
193 /*
194 * Consistent DMA mask is set to 32 bit because it cannot be set to
195 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
196 * come off this pool.
197 */
198 if (pci_set_dma_mask(pdev, mask) == 0 &&
199 pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
200 adapter->pci_using_dac = 1;
201 return 0;
202 }
203#endif /* CONFIG_IA64 */
204
205set_32_bit_mask:
206 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
207 if (!err)
208 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
209 if (err) {
210 DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
211 return err;
212 }
213
214 adapter->pci_using_dac = 0;
215 return 0;
216}
217
218static void netxen_check_options(struct netxen_adapter *adapter)
219{
220 switch (adapter->ahw.boardcfg.board_type) {
221 case NETXEN_BRDTYPE_P3_HMEZ:
222 case NETXEN_BRDTYPE_P3_XG_LOM:
223 case NETXEN_BRDTYPE_P3_10G_CX4:
224 case NETXEN_BRDTYPE_P3_10G_CX4_LP:
225 case NETXEN_BRDTYPE_P3_IMEZ:
226 case NETXEN_BRDTYPE_P3_10G_SFP_PLUS:
a70f9393
DP		 227 case NETXEN_BRDTYPE_P3_10G_SFP_QT:
228 case NETXEN_BRDTYPE_P3_10G_SFP_CT:
2956640d
DP		 229 case NETXEN_BRDTYPE_P3_10G_XFP:
230 case NETXEN_BRDTYPE_P3_10000_BASE_T:
231 adapter->msix_supported = !!use_msi_x;
232 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
233 break;
234
235 case NETXEN_BRDTYPE_P2_SB31_10G:
236 case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
237 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
238 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
239 adapter->msix_supported = 0;
240 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
241 break;
242
243 case NETXEN_BRDTYPE_P3_REF_QG:
244 case NETXEN_BRDTYPE_P3_4_GB:
245 case NETXEN_BRDTYPE_P3_4_GB_MM:
ec68db69 246 adapter->msix_supported = !!use_msi_x;
c7860a2a 247 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
a70f9393
DP		 248 break;
249
2956640d
DP		 250 case NETXEN_BRDTYPE_P2_SB35_4G:
251 case NETXEN_BRDTYPE_P2_SB31_2G:
252 adapter->msix_supported = 0;
253 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
254 break;
255
c7860a2a
DP		 256 case NETXEN_BRDTYPE_P3_10G_TP:
257 adapter->msix_supported = !!use_msi_x;
258 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
259 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_10G;
260 else
261 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
262 break;
263
2956640d
DP		 264 default:
265 adapter->msix_supported = 0;
266 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
267
268 printk(KERN_WARNING "Unknown board type(0x%x)\n",
269 adapter->ahw.boardcfg.board_type);
270 break;
271 }
272
273 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
274 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
275 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
276
277 adapter->max_possible_rss_rings = 1;
278 return;
279}
280
281static int
282netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
283{
27c915a4 284 u32 val, timeout;
2956640d
DP		 285
286 if (first_boot == 0x55555555) {
287 /* This is the first boot after power up */
27c915a4
DP		 288 adapter->pci_write_normalize(adapter,
289 NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
290
291 if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
292 return 0;
2956640d
DP		 293
294 /* PCI bus master workaround */
295 adapter->hw_read_wx(adapter,
296 NETXEN_PCIE_REG(0x4), &first_boot, 4);
297 if (!(first_boot & 0x4)) {
298 first_boot |= 0x4;
299 adapter->hw_write_wx(adapter,
300 NETXEN_PCIE_REG(0x4), &first_boot, 4);
301 adapter->hw_read_wx(adapter,
302 NETXEN_PCIE_REG(0x4), &first_boot, 4);
303 }
304
305 /* This is the first boot after power up */
306 adapter->hw_read_wx(adapter,
307 NETXEN_ROMUSB_GLB_SW_RESET, &first_boot, 4);
308 if (first_boot != 0x80000f) {
309 /* clear the register for future unloads/loads */
310 adapter->pci_write_normalize(adapter,
311 NETXEN_CAM_RAM(0x1fc), 0);
27c915a4 312 return -EIO;
2956640d
DP		 313 }
314
27c915a4
DP		 315 /* Start P2 boot loader */
316 val = adapter->pci_read_normalize(adapter,
317 NETXEN_ROMUSB_GLB_PEGTUNE_DONE);
318 adapter->pci_write_normalize(adapter,
319 NETXEN_ROMUSB_GLB_PEGTUNE_DONE, val | 0x1);
320 timeout = 0;
321 do {
322 msleep(1);
323 val = adapter->pci_read_normalize(adapter,
324 NETXEN_CAM_RAM(0x1fc));
325
326 if (++timeout > 5000)
327 return -EIO;
328
329 } while (val == NETXEN_BDINFO_MAGIC);
2956640d 330 }
27c915a4 331 return 0;
2956640d
DP		 332}
333
334static void netxen_set_port_mode(struct netxen_adapter *adapter)
335{
336 u32 val, data;
337
338 val = adapter->ahw.boardcfg.board_type;
339 if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
340 (val == NETXEN_BRDTYPE_P3_XG_LOM)) {
341 if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
342 data = NETXEN_PORT_MODE_802_3_AP;
343 adapter->hw_write_wx(adapter,
344 NETXEN_PORT_MODE_ADDR, &data, 4);
345 } else if (port_mode == NETXEN_PORT_MODE_XG) {
346 data = NETXEN_PORT_MODE_XG;
347 adapter->hw_write_wx(adapter,
348 NETXEN_PORT_MODE_ADDR, &data, 4);
349 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
350 data = NETXEN_PORT_MODE_AUTO_NEG_1G;
351 adapter->hw_write_wx(adapter,
352 NETXEN_PORT_MODE_ADDR, &data, 4);
353 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
354 data = NETXEN_PORT_MODE_AUTO_NEG_XG;
355 adapter->hw_write_wx(adapter,
356 NETXEN_PORT_MODE_ADDR, &data, 4);
357 } else {
358 data = NETXEN_PORT_MODE_AUTO_NEG;
359 adapter->hw_write_wx(adapter,
360 NETXEN_PORT_MODE_ADDR, &data, 4);
361 }
362
363 if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
364 (wol_port_mode != NETXEN_PORT_MODE_XG) &&
365 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
366 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
367 wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
368 }
369 adapter->hw_write_wx(adapter, NETXEN_WOL_PORT_MODE,
370 &wol_port_mode, 4);
371 }
372}
373
374#define PCI_CAP_ID_GEN 0x10
375
376static void netxen_pcie_strap_init(struct netxen_adapter *adapter)
377{
378 u32 pdevfuncsave;
379 u32 c8c9value = 0;
380 u32 chicken = 0;
381 u32 control = 0;
382 int i, pos;
383 struct pci_dev *pdev;
384
2956640d
DP		 385 pdev = adapter->pdev;
386
387 adapter->hw_read_wx(adapter,
388 NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
389 /* clear chicken3.25:24 */
390 chicken &= 0xFCFFFFFF;
391 /*
392 * if gen1 and B0, set F1020 - if gen 2, do nothing
393 * if gen2 set to F1000
394 */
395 pos = pci_find_capability(pdev, PCI_CAP_ID_GEN);
396 if (pos == 0xC0) {
397 pci_read_config_dword(pdev, pos + 0x10, &control);
398 if ((control & 0x000F0000) != 0x00020000) {
399 /* set chicken3.24 if gen1 */
400 chicken |= 0x01000000;
401 }
402 printk(KERN_INFO "%s Gen2 strapping detected\n",
403 netxen_nic_driver_name);
404 c8c9value = 0xF1000;
405 } else {
406 /* set chicken3.24 if gen1 */
407 chicken |= 0x01000000;
408 printk(KERN_INFO "%s Gen1 strapping detected\n",
409 netxen_nic_driver_name);
410 if (adapter->ahw.revision_id == NX_P3_B0)
411 c8c9value = 0xF1020;
412 else
413 c8c9value = 0;
414
415 }
416 adapter->hw_write_wx(adapter,
417 NETXEN_PCIE_REG(PCIE_CHICKEN3), &chicken, 4);
418
419 if (!c8c9value)
420 return;
421
422 pdevfuncsave = pdev->devfn;
423 if (pdevfuncsave & 0x07)
424 return;
425
426 for (i = 0; i < 8; i++) {
427 pci_read_config_dword(pdev, pos + 8, &control);
428 pci_read_config_dword(pdev, pos + 8, &control);
429 pci_write_config_dword(pdev, pos + 8, c8c9value);
430 pdev->devfn++;
431 }
432 pdev->devfn = pdevfuncsave;
433}
434
435static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
436{
437 u32 control;
438 int pos;
439
440 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
441 if (pos) {
442 pci_read_config_dword(pdev, pos, &control);
443 if (enable)
444 control |= PCI_MSIX_FLAGS_ENABLE;
445 else
446 control = 0;
447 pci_write_config_dword(pdev, pos, control);
448 }
449}
450
451static void netxen_init_msix_entries(struct netxen_adapter *adapter)
452{
453 int i;
454
455 for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
456 adapter->msix_entries[i].entry = i;
457}
458
9dc28efe
DP		 459static int
460netxen_read_mac_addr(struct netxen_adapter *adapter)
461{
462 int i;
463 unsigned char *p;
464 __le64 mac_addr;
9dc28efe
DP		 465 struct net_device *netdev = adapter->netdev;
466 struct pci_dev *pdev = adapter->pdev;
467
468 if (netxen_is_flash_supported(adapter) != 0)
469 return -EIO;
470
471 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
472 if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
473 return -EIO;
474 } else {
475 if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
476 return -EIO;
477 }
478
479 p = (unsigned char *)&mac_addr;
480 for (i = 0; i < 6; i++)
481 netdev->dev_addr[i] = *(p + 5 - i);
482
483 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
484
485 /* set station address */
486
e174961c
JB		 487 if (!is_valid_ether_addr(netdev->perm_addr))
488 dev_warn(&pdev->dev, "Bad MAC address %pM.\n", netdev->dev_addr);
489 else
9dc28efe
DP		 490 adapter->macaddr_set(adapter, netdev->dev_addr);
491
492 return 0;
493}
494
1abd266f
SH		 495static void netxen_set_multicast_list(struct net_device *dev)
496{
497 struct netxen_adapter *adapter = netdev_priv(dev);
498
499 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
500 netxen_p3_nic_set_multi(dev);
501 else
502 netxen_p2_nic_set_multi(dev);
503}
504
505static const struct net_device_ops netxen_netdev_ops = {
506 .ndo_open = netxen_nic_open,
507 .ndo_stop = netxen_nic_close,
508 .ndo_start_xmit = netxen_nic_xmit_frame,
509 .ndo_get_stats = netxen_nic_get_stats,
510 .ndo_validate_addr = eth_validate_addr,
511 .ndo_set_multicast_list = netxen_set_multicast_list,
512 .ndo_set_mac_address = netxen_nic_set_mac,
513 .ndo_change_mtu = netxen_nic_change_mtu,
514 .ndo_tx_timeout = netxen_tx_timeout,
515#ifdef CONFIG_NET_POLL_CONTROLLER
516 .ndo_poll_controller = netxen_nic_poll_controller,
517#endif
518};
519
3d396eb1
AK		 520/*
521 * netxen_nic_probe()
522 *
523 * The Linux system will invoke this after identifying the vendor ID and
524 * device Id in the pci_tbl supported by this module.
525 *
526 * A quad port card has one operational PCI config space, (function 0),
527 * which is used to access all four ports.
528 *
529 * This routine will initialize the adapter, and setup the global parameters
530 * along with the port's specific structure.
531 */
532static int __devinit
533netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
534{
535 struct net_device *netdev = NULL;
536 struct netxen_adapter *adapter = NULL;
ed25ffa1
AK		 537 void __iomem *mem_ptr0 = NULL;
538 void __iomem *mem_ptr1 = NULL;
539 void __iomem *mem_ptr2 = NULL;
6c80b18d
MT		 540 unsigned long first_page_group_end;
541 unsigned long first_page_group_start;
542
cb8011ad 543
a608ab9c 544 u8 __iomem *db_ptr = NULL;
2956640d
DP		 545 unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
546 int i = 0, err;
547 int first_driver, first_boot;
6c80b18d 548 u32 val;
3176ff3e 549 int pci_func_id = PCI_FUNC(pdev->devfn);
2956640d
DP		 550 struct netxen_legacy_intr_set *legacy_intrp;
551 uint8_t revision_id;
3d396eb1 552
dcd56fdb 553 if (pci_func_id == 0)
2956640d 554 printk(KERN_INFO "%s\n", netxen_nic_driver_string);
6c80b18d 555
3176ff3e 556 if (pdev->class != 0x020000) {
dcd56fdb 557 printk(KERN_DEBUG "NetXen function %d, class %x will not "
3176ff3e 558 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 559 return -ENODEV;
560 }
2956640d 561
11d89d63
DP		 562 if (pdev->revision >= NX_P3_A0 && pdev->revision < NX_P3_B1) {
563 printk(KERN_WARNING "NetXen chip revisions between 0x%x-0x%x"
564 "will not be enabled.\n",
565 NX_P3_A0, NX_P3_B1);
566 return -ENODEV;
567 }
568
3d396eb1
AK		 569 if ((err = pci_enable_device(pdev)))
570 return err;
2956640d 571
3d396eb1
AK		 572 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
573 err = -ENODEV;
574 goto err_out_disable_pdev;
575 }
576
577 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
578 goto err_out_disable_pdev;
579
580 pci_set_master(pdev);
3176ff3e
MT		 581
582 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
583 if(!netdev) {
584 printk(KERN_ERR"%s: Failed to allocate memory for the "
585 "device block.Check system memory resource"
586 " usage.\n", netxen_nic_driver_name);
587 goto err_out_free_res;
588 }
589
3176ff3e
MT		 590 SET_NETDEV_DEV(netdev, &pdev->dev);
591
4cf1653a 592 adapter = netdev_priv(netdev);
2956640d
DP		 593 adapter->netdev = netdev;
594 adapter->pdev = pdev;
13ba9c77 595 adapter->ahw.pci_func = pci_func_id;
2956640d
DP		 596
597 revision_id = pdev->revision;
598 adapter->ahw.revision_id = revision_id;
599
600 err = nx_set_dma_mask(adapter, revision_id);
601 if (err)
602 goto err_out_free_netdev;
603
3ce06a32
DP		 604 rwlock_init(&adapter->adapter_lock);
605 adapter->ahw.qdr_sn_window = -1;
606 adapter->ahw.ddr_mn_window = -1;
13ba9c77 607
3d396eb1
AK		 608 /* remap phys address */
609 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
610 mem_len = pci_resource_len(pdev, 0);
3ce06a32
DP		 611 pci_len0 = 0;
612
613 adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
614 adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
615 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
616 adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
617 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_128M;
618 adapter->pci_write_normalize = netxen_nic_pci_write_normalize_128M;
619 adapter->pci_set_window = netxen_nic_pci_set_window_128M;
620 adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
621 adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
3d396eb1
AK		 622
623 /* 128 Meg of memory */
6c80b18d
MT		 624 if (mem_len == NETXEN_PCI_128MB_SIZE) {
625 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
626 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
627 SECOND_PAGE_GROUP_SIZE);
628 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
629 THIRD_PAGE_GROUP_SIZE);
630 first_page_group_start = FIRST_PAGE_GROUP_START;
631 first_page_group_end = FIRST_PAGE_GROUP_END;
632 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
633 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
634 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
635 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
636 first_page_group_start = 0;
637 first_page_group_end = 0;
3ce06a32
DP		 638 } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
639 adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
640 adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
641 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
642 adapter->pci_write_immediate =
643 netxen_nic_pci_write_immediate_2M;
644 adapter->pci_read_normalize = netxen_nic_pci_read_normalize_2M;
645 adapter->pci_write_normalize =
646 netxen_nic_pci_write_normalize_2M;
647 adapter->pci_set_window = netxen_nic_pci_set_window_2M;
648 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
649 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
650
651 mem_ptr0 = ioremap(mem_base, mem_len);
652 pci_len0 = mem_len;
653 first_page_group_start = 0;
654 first_page_group_end = 0;
655
656 adapter->ahw.ddr_mn_window = 0;
657 adapter->ahw.qdr_sn_window = 0;
658
659 adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
660 (pci_func_id * 0x20);
661 adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
662 if (pci_func_id < 4)
663 adapter->ahw.ms_win_crb += (pci_func_id * 0x20);
664 else
665 adapter->ahw.ms_win_crb +=
666 0xA0 + ((pci_func_id - 4) * 0x10);
6c80b18d 667 } else {
4790654c 668 err = -EIO;
6c80b18d
MT		 669 goto err_out_free_netdev;
670 }
cb8011ad 671
3ce06a32 672 dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
cb8011ad 673
ed25ffa1
AK		 674 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
675 db_len = pci_resource_len(pdev, 4);
676
677 if (db_len == 0) {
678 printk(KERN_ERR "%s: doorbell is disabled\n",
2956640d 679 netxen_nic_driver_name);
ed25ffa1
AK		 680 err = -EIO;
681 goto err_out_iounmap;
682 }
683 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
684 db_len);
685
686 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
a608ab9c 687 if (!db_ptr) {
ed25ffa1 688 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
2956640d 689 netxen_nic_driver_name);
ed25ffa1
AK		 690 err = -EIO;
691 goto err_out_iounmap;
3d396eb1 692 }
ed25ffa1 693 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
3d396eb1 694
6c80b18d 695 adapter->ahw.pci_base0 = mem_ptr0;
3ce06a32 696 adapter->ahw.pci_len0 = pci_len0;
6c80b18d
MT		 697 adapter->ahw.first_page_group_start = first_page_group_start;
698 adapter->ahw.first_page_group_end = first_page_group_end;
699 adapter->ahw.pci_base1 = mem_ptr1;
700 adapter->ahw.pci_base2 = mem_ptr2;
701 adapter->ahw.db_base = db_ptr;
702 adapter->ahw.db_len = db_len;
3d396eb1 703
bea3348e 704 netif_napi_add(netdev, &adapter->napi,
2956640d
DP		 705 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
706
707 if (revision_id >= NX_P3_B0)
708 legacy_intrp = &legacy_intr[pci_func_id];
709 else
710 legacy_intrp = &legacy_intr[0];
711
712 adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
713 adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
714 adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
715 adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
bea3348e 716
2d1a3bbd 717 /* this will be read from FW later */
718 adapter->intr_scheme = -1;
443be796 719 adapter->msi_mode = -1;
2d1a3bbd 720
721 /* This will be reset for mezz cards */
3176ff3e 722 adapter->portnum = pci_func_id;
2d1a3bbd 723 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 724 adapter->rx_csum = 1;
623621b0 725 adapter->mc_enabled = 0;
83821a07 726 if (NX_IS_REVISION_P3(revision_id))
2956640d 727 adapter->max_mc_count = 38;
83821a07 728 else
2956640d 729 adapter->max_mc_count = 16;
3176ff3e 730
1abd266f 731 netdev->netdev_ops = &netxen_netdev_ops;
05aaa02d 732 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 733
734 netxen_nic_change_mtu(netdev, netdev->mtu);
735
736 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
1abd266f 737
cdff1036
DP		 738 netdev->features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
739 netdev->vlan_features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
740
cd1f8160 741 if (NX_IS_REVISION_P3(revision_id)) {
cdff1036
DP		 742 netdev->features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
743 netdev->vlan_features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
cd1f8160 744 }
3176ff3e 745
cdff1036 746 if (adapter->pci_using_dac) {
3176ff3e 747 netdev->features |= NETIF_F_HIGHDMA;
cdff1036
DP		 748 netdev->vlan_features |= NETIF_F_HIGHDMA;
749 }
3176ff3e 750
6c80b18d
MT		 751 /*
752 * Set the CRB window to invalid. If any register in window 0 is
753 * accessed it should set the window to 0 and then reset it to 1.
754 */
755 adapter->curr_window = 255;
756
dcd56fdb
DP		 757 if (netxen_nic_get_board_info(adapter) != 0) {
758 printk("%s: Error getting board config info.\n",
2956640d 759 netxen_nic_driver_name);
dcd56fdb
DP		 760 err = -EIO;
761 goto err_out_iounmap;
762 }
6c80b18d 763
6c80b18d
MT		 764 netxen_initialize_adapter_ops(adapter);
765
13ba9c77 766 /* Mezz cards have PCI function 0,2,3 enabled */
dc515f2e
DP		 767 switch (adapter->ahw.boardcfg.board_type) {
768 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
769 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
770 if (pci_func_id >= 2)
13ba9c77 771 adapter->portnum = pci_func_id - 2;
dc515f2e
DP		 772 break;
773 default:
774 break;
775 }
13ba9c77 776
2956640d
DP		 777 /*
778 * This call will setup various max rx/tx counts.
779 * It must be done before any buffer/ring allocations.
780 */
781 netxen_check_options(adapter);
3d396eb1 782
2956640d
DP		 783 first_driver = 0;
784 if (NX_IS_REVISION_P3(revision_id)) {
785 if (adapter->ahw.pci_func == 0)
786 first_driver = 1;
787 } else {
788 if (adapter->portnum == 0)
789 first_driver = 1;
790 }
3d396eb1 791
2956640d
DP		 792 if (first_driver) {
793 first_boot = adapter->pci_read_normalize(adapter,
794 NETXEN_CAM_RAM(0x1fc));
3176ff3e 795
2956640d
DP		 796 err = netxen_check_hw_init(adapter, first_boot);
797 if (err) {
798 printk(KERN_ERR "%s: error in init HW init sequence\n",
799 netxen_nic_driver_name);
800 goto err_out_iounmap;
3176ff3e 801 }
3176ff3e 802
2956640d
DP		 803 if (NX_IS_REVISION_P3(revision_id))
804 netxen_set_port_mode(adapter);
805
806 if (first_boot != 0x55555555) {
3ce06a32
DP		 807 adapter->pci_write_normalize(adapter,
808 CRB_CMDPEG_STATE, 0);
439b454e
DP		 809 netxen_pinit_from_rom(adapter, 0);
810 msleep(1);
2956640d 811 }
27c915a4 812 netxen_load_firmware(adapter);
2956640d
DP		 813
814 if (NX_IS_REVISION_P3(revision_id))
815 netxen_pcie_strap_init(adapter);
816
817 if (NX_IS_REVISION_P2(revision_id)) {
623621b0
DP		 818
819 /* Initialize multicast addr pool owners */
820 val = 0x7654;
821 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
822 val |= 0x0f000000;
823 netxen_crb_writelit_adapter(adapter,
824 NETXEN_MAC_ADDR_CNTL_REG, val);
825
6c80b18d 826 }
96acb6eb 827
2956640d
DP		 828 err = netxen_initialize_adapter_offload(adapter);
829 if (err)
830 goto err_out_iounmap;
6c80b18d
MT		 831
832 /*
833 * Tell the hardware our version number.
834 */
4790654c 835 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
6c80b18d
MT		 836 | ((_NETXEN_NIC_LINUX_MINOR << 8))
837 | (_NETXEN_NIC_LINUX_SUBVERSION);
3ce06a32 838 adapter->pci_write_normalize(adapter, CRB_DRIVER_VERSION, i);
3d396eb1 839
3176ff3e 840 /* Handshake with the card before we register the devices. */
27c915a4
DP		 841 err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
842 if (err)
843 goto err_out_free_offload;
2956640d 844
2956640d
DP		 845 } /* first_driver */
846
847 netxen_nic_flash_print(adapter);
3d396eb1 848
d9e651bc
DP		 849 if (NX_IS_REVISION_P3(revision_id)) {
850 adapter->hw_read_wx(adapter,
851 NETXEN_MIU_MN_CONTROL, &val, 4);
852 adapter->ahw.cut_through = (val & 0x4) ? 1 : 0;
853 dev_info(&pdev->dev, "firmware running in %s mode\n",
854 adapter->ahw.cut_through ? "cut through" : "legacy");
855 }
856
3d396eb1 857 /*
6c80b18d 858 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 859 */
dcd56fdb 860 adapter->physical_port = adapter->portnum;
3ce06a32 861 i = adapter->pci_read_normalize(adapter, CRB_V2P(adapter->portnum));
6c80b18d 862 if (i != 0x55555555)
3276fbad 863 adapter->physical_port = i;
6c80b18d 864
2956640d
DP		 865 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
866
867 netxen_set_msix_bit(pdev, 0);
868
869 if (NX_IS_REVISION_P3(revision_id)) {
870 if ((mem_len != NETXEN_PCI_128MB_SIZE) &&
871 mem_len != NETXEN_PCI_2MB_SIZE)
872 adapter->msix_supported = 0;
873 }
874
875 if (adapter->msix_supported) {
876
877 netxen_init_msix_entries(adapter);
878
879 if (pci_enable_msix(pdev, adapter->msix_entries,
880 MSIX_ENTRIES_PER_ADAPTER))
881 goto request_msi;
882
883 adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
884 netxen_set_msix_bit(pdev, 1);
885 dev_info(&pdev->dev, "using msi-x interrupts\n");
886
887 } else {
888request_msi:
889 if (use_msi && !pci_enable_msi(pdev)) {
890 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
891 dev_info(&pdev->dev, "using msi interrupts\n");
892 } else
893 dev_info(&pdev->dev, "using legacy interrupts\n");
894 }
895
896 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
897 netdev->irq = adapter->msix_entries[0].vector;
898 else
899 netdev->irq = pdev->irq;
900
901 err = netxen_receive_peg_ready(adapter);
902 if (err)
903 goto err_out_disable_msi;
904
905 init_timer(&adapter->watchdog_timer);
2956640d
DP		 906 adapter->watchdog_timer.function = &netxen_watchdog;
907 adapter->watchdog_timer.data = (unsigned long)adapter;
908 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
909 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
910
9dc28efe
DP		 911 err = netxen_read_mac_addr(adapter);
912 if (err)
913 dev_warn(&pdev->dev, "failed to read mac addr\n");
2956640d 914
3176ff3e
MT		 915 netif_carrier_off(netdev);
916 netif_stop_queue(netdev);
917
6c80b18d
MT		 918 if ((err = register_netdev(netdev))) {
919 printk(KERN_ERR "%s: register_netdev failed port #%d"
920 " aborting\n", netxen_nic_driver_name,
921 adapter->portnum);
922 err = -EIO;
2956640d 923 goto err_out_disable_msi;
6c80b18d
MT		 924 }
925
926 pci_set_drvdata(pdev, adapter);
3d396eb1 927
2956640d
DP		 928 switch (adapter->ahw.board_type) {
929 case NETXEN_NIC_GBE:
930 dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
931 adapter->netdev->name);
932 break;
933 case NETXEN_NIC_XGBE:
934 dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
935 adapter->netdev->name);
936 break;
3d396eb1 937 }
3d396eb1 938
2956640d
DP		 939 return 0;
940
941err_out_disable_msi:
942 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
943 pci_disable_msix(pdev);
6c80b18d
MT		 944 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
945 pci_disable_msi(pdev);
946
27c915a4 947err_out_free_offload:
2956640d
DP		 948 if (first_driver)
949 netxen_free_adapter_offload(adapter);
3d396eb1 950
2956640d 951err_out_iounmap:
ed25ffa1
AK		 952 if (db_ptr)
953 iounmap(db_ptr);
954
ed25ffa1
AK		 955 if (mem_ptr0)
956 iounmap(mem_ptr0);
957 if (mem_ptr1)
958 iounmap(mem_ptr1);
959 if (mem_ptr2)
960 iounmap(mem_ptr2);
cb8011ad 961
6c80b18d
MT		 962err_out_free_netdev:
963 free_netdev(netdev);
964
965err_out_free_res:
3d396eb1 966 pci_release_regions(pdev);
6c80b18d
MT		 967
968err_out_disable_pdev:
2956640d 969 pci_set_drvdata(pdev, NULL);
3d396eb1
AK		 970 pci_disable_device(pdev);
971 return err;
972}
973
974static void __devexit netxen_nic_remove(struct pci_dev *pdev)
975{
976 struct netxen_adapter *adapter;
3176ff3e 977 struct net_device *netdev;
3d396eb1 978
6c80b18d 979 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 980 if (adapter == NULL)
981 return;
982
6c80b18d
MT		 983 netdev = adapter->netdev;
984
96acb6eb
DP		 985 unregister_netdev(netdev);
986
96acb6eb 987 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
3d396eb1 988 netxen_free_hw_resources(adapter);
9e410778 989 netxen_release_rx_buffers(adapter);
2956640d 990 netxen_free_sw_resources(adapter);
06e9d9f9
DP		 991
992 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
993 netxen_p3_free_mac_list(adapter);
96acb6eb 994 }
3d396eb1 995
439b454e
DP		 996 if (adapter->portnum == 0)
997 netxen_free_adapter_offload(adapter);
96acb6eb 998
3052246c 999 if (adapter->irq)
1000 free_irq(adapter->irq, adapter);
1001
2956640d
DP		 1002 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
1003 pci_disable_msix(pdev);
3052246c 1004 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
1005 pci_disable_msi(pdev);
1006
6c80b18d
MT		 1007 iounmap(adapter->ahw.db_base);
1008 iounmap(adapter->ahw.pci_base0);
3bfafd6b
DP		 1009 if (adapter->ahw.pci_base1 != NULL)
1010 iounmap(adapter->ahw.pci_base1);
1011 if (adapter->ahw.pci_base2 != NULL)
1012 iounmap(adapter->ahw.pci_base2);
595e3fb8
MT		 1013
1014 pci_release_regions(pdev);
3052246c 1015 pci_disable_device(pdev);
595e3fb8
MT		 1016 pci_set_drvdata(pdev, NULL);
1017
6c80b18d 1018 free_netdev(netdev);
3d396eb1
AK		 1019}
1020
1021/*
1022 * Called when a network interface is made active
1023 * @returns 0 on success, negative value on failure
1024 */
1025static int netxen_nic_open(struct net_device *netdev)
1026{
4cf1653a 1027 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1028 int err = 0;
1029 int ctx, ring;
05aaa02d
DP		 1030 irq_handler_t handler;
1031 unsigned long flags = IRQF_SAMPLE_RANDOM;
3d396eb1 1032
dcd56fdb
DP		 1033 if (adapter->driver_mismatch)
1034 return -EIO;
1035
3d396eb1
AK		 1036 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
1037 err = netxen_init_firmware(adapter);
1038 if (err != 0) {
1039 printk(KERN_ERR "Failed to init firmware\n");
1040 return -EIO;
1041 }
3d396eb1 1042
83821a07
DP		 1043 if (adapter->fw_major < 4)
1044 adapter->max_rds_rings = 3;
1045 else
1046 adapter->max_rds_rings = 2;
1047
2956640d 1048 err = netxen_alloc_sw_resources(adapter);
3d396eb1 1049 if (err) {
2956640d
DP		 1050 printk(KERN_ERR "%s: Error in setting sw resources\n",
1051 netdev->name);
3d396eb1
AK		 1052 return err;
1053 }
2956640d
DP		 1054
1055 netxen_nic_clear_stats(adapter);
1056
1057 err = netxen_alloc_hw_resources(adapter);
1058 if (err) {
1059 printk(KERN_ERR "%s: Error in setting hw resources\n",
1060 netdev->name);
1061 goto err_out_free_sw;
1062 }
1063
092bc571
DP		 1064 if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) ||
1065 (adapter->intr_scheme != INTR_SCHEME_PERPORT)) {
1066 printk(KERN_ERR "%s: Firmware interrupt scheme is "
1067 "incompatible with driver\n",
1068 netdev->name);
1069 adapter->driver_mismatch = 1;
1070 goto err_out_free_hw;
1071 }
1072
2956640d
DP		 1073 if (adapter->fw_major < 4) {
1074 adapter->crb_addr_cmd_producer =
1075 crb_cmd_producer[adapter->portnum];
1076 adapter->crb_addr_cmd_consumer =
1077 crb_cmd_consumer[adapter->portnum];
2956640d 1078
83821a07
DP		 1079 netxen_nic_update_cmd_producer(adapter, 0);
1080 netxen_nic_update_cmd_consumer(adapter, 0);
1081 }
2956640d 1082
3d396eb1 1083 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
48bfd1e0 1084 for (ring = 0; ring < adapter->max_rds_rings; ring++)
3d396eb1 1085 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 1086 }
2956640d 1087 if (NETXEN_IS_MSI_FAMILY(adapter))
05aaa02d
DP		 1088 handler = netxen_msi_intr;
1089 else {
1090 flags |= IRQF_SHARED;
1091 handler = netxen_intr;
1092 }
2956640d 1093 adapter->irq = netdev->irq;
05aaa02d
DP		 1094 err = request_irq(adapter->irq, handler,
1095 flags, netdev->name, adapter);
3d396eb1
AK		 1096 if (err) {
1097 printk(KERN_ERR "request_irq failed with: %d\n", err);
9e410778 1098 goto err_out_free_rxbuf;
3d396eb1 1099 }
ed25ffa1
AK		 1100
1101 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
1102 }
2956640d 1103
3d396eb1
AK		 1104 /* Done here again so that even if phantom sw overwrote it,
1105 * we set it */
c9fc891f 1106 err = adapter->init_port(adapter, adapter->physical_port);
2956640d 1107 if (err) {
595e3fb8
MT		 1108 printk(KERN_ERR "%s: Failed to initialize port %d\n",
1109 netxen_nic_driver_name, adapter->portnum);
2956640d 1110 goto err_out_free_irq;
595e3fb8 1111 }
2956640d 1112 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 1113
3176ff3e 1114 netxen_nic_set_link_parameters(adapter);
3d396eb1 1115
1abd266f 1116 netxen_set_multicast_list(netdev);
9ad27643 1117 if (adapter->set_mtu)
c9fc891f 1118 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 1119
922c4f2c 1120 adapter->ahw.linkup = 0;
dcd56fdb 1121 mod_timer(&adapter->watchdog_timer, jiffies);
05aaa02d
DP		 1122
1123 napi_enable(&adapter->napi);
1124 netxen_nic_enable_int(adapter);
1125
dcd56fdb 1126 netif_start_queue(netdev);
3d396eb1
AK		 1127
1128 return 0;
2956640d
DP		 1129
1130err_out_free_irq:
1131 free_irq(adapter->irq, adapter);
9e410778
DP		 1132err_out_free_rxbuf:
1133 netxen_release_rx_buffers(adapter);
092bc571 1134err_out_free_hw:
2956640d
DP		 1135 netxen_free_hw_resources(adapter);
1136err_out_free_sw:
1137 netxen_free_sw_resources(adapter);
1138 return err;
3d396eb1
AK		 1139}
1140
1141/*
1142 * netxen_nic_close - Disables a network interface entry point
1143 */
1144static int netxen_nic_close(struct net_device *netdev)
1145{
3176ff3e 1146 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1147
1148 netif_carrier_off(netdev);
1149 netif_stop_queue(netdev);
bea3348e 1150 napi_disable(&adapter->napi);
3d396eb1 1151
72b0a7a8 1152 if (adapter->stop_port)
1153 adapter->stop_port(adapter);
1154
e01872af 1155 netxen_nic_disable_int(adapter);
1156
2956640d
DP		 1157 netxen_release_tx_buffers(adapter);
1158
922c4f2c
DP		 1159 FLUSH_SCHEDULED_WORK();
1160 del_timer_sync(&adapter->watchdog_timer);
3d396eb1
AK		 1161
1162 return 0;
1163}
1164
391587c3 1165static bool netxen_tso_check(struct net_device *netdev,
cd1f8160
DP		 1166 struct cmd_desc_type0 *desc, struct sk_buff *skb)
1167{
391587c3
DP		 1168 bool tso = false;
1169 u8 opcode = TX_ETHER_PKT;
cdff1036
DP		 1170 __be16 protocol = skb->protocol;
1171 u16 flags = 0;
1172
09640e63 1173 if (protocol == cpu_to_be16(ETH_P_8021Q)) {
cdff1036
DP		 1174 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)skb->data;
1175 protocol = vh->h_vlan_encapsulated_proto;
1176 flags = FLAGS_VLAN_TAGGED;
1177 }
cd1f8160 1178
391587c3
DP		 1179 if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
1180 skb_shinfo(skb)->gso_size > 0) {
1181
1182 desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1183 desc->total_hdr_length =
1184 skb_transport_offset(skb) + tcp_hdrlen(skb);
1185
09640e63 1186 opcode = (protocol == cpu_to_be16(ETH_P_IPV6)) ?
391587c3
DP		 1187 TX_TCP_LSO6 : TX_TCP_LSO;
1188 tso = true;
cd1f8160
DP		 1189
1190 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
391587c3
DP		 1191 u8 l4proto;
1192
09640e63 1193 if (protocol == cpu_to_be16(ETH_P_IP)) {
391587c3
DP		 1194 l4proto = ip_hdr(skb)->protocol;
1195
1196 if (l4proto == IPPROTO_TCP)
1197 opcode = TX_TCP_PKT;
1198 else if(l4proto == IPPROTO_UDP)
1199 opcode = TX_UDP_PKT;
09640e63 1200 } else if (protocol == cpu_to_be16(ETH_P_IPV6)) {
391587c3
DP		 1201 l4proto = ipv6_hdr(skb)->nexthdr;
1202
1203 if (l4proto == IPPROTO_TCP)
1204 opcode = TX_TCPV6_PKT;
1205 else if(l4proto == IPPROTO_UDP)
1206 opcode = TX_UDPV6_PKT;
1207 }
cd1f8160
DP		 1208 }
1209 desc->tcp_hdr_offset = skb_transport_offset(skb);
1210 desc->ip_hdr_offset = skb_network_offset(skb);
cdff1036 1211 netxen_set_tx_flags_opcode(desc, flags, opcode);
391587c3 1212 return tso;
cd1f8160
DP		 1213}
1214
6f703406
DP		 1215static void
1216netxen_clean_tx_dma_mapping(struct pci_dev *pdev,
1217 struct netxen_cmd_buffer *pbuf, int last)
1218{
1219 int k;
1220 struct netxen_skb_frag *buffrag;
1221
1222 buffrag = &pbuf->frag_array[0];
1223 pci_unmap_single(pdev, buffrag->dma,
1224 buffrag->length, PCI_DMA_TODEVICE);
1225
1226 for (k = 1; k < last; k++) {
1227 buffrag = &pbuf->frag_array[k];
1228 pci_unmap_page(pdev, buffrag->dma,
1229 buffrag->length, PCI_DMA_TODEVICE);
1230 }
1231}
1232
3d396eb1
AK		 1233static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1234{
3176ff3e 1235 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 1236 struct netxen_hardware_context *hw = &adapter->ahw;
1237 unsigned int first_seg_len = skb->len - skb->data_len;
391587c3 1238 struct netxen_cmd_buffer *pbuf;
3d396eb1 1239 struct netxen_skb_frag *buffrag;
391587c3 1240 struct cmd_desc_type0 *hwdesc;
6f703406
DP		 1241 struct pci_dev *pdev = adapter->pdev;
1242 dma_addr_t temp_dma;
391587c3 1243 int i, k;
3d396eb1 1244
ba53e6b4 1245 u32 producer, consumer;
391587c3 1246 int frag_count, no_of_desc;
ba53e6b4 1247 u32 num_txd = adapter->max_tx_desc_count;
391587c3 1248 bool is_tso = false;
3d396eb1 1249
3d396eb1
AK		 1250 frag_count = skb_shinfo(skb)->nr_frags + 1;
1251
3d396eb1
AK		 1252 /* There 4 fragments per descriptor */
1253 no_of_desc = (frag_count + 3) >> 2;
53a01e00 1254
ba53e6b4
DP		 1255 producer = adapter->cmd_producer;
1256 smp_mb();
1257 consumer = adapter->last_cmd_consumer;
1258 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
1259 netif_stop_queue(netdev);
1260 smp_mb();
1261 return NETDEV_TX_BUSY;
53a01e00 1262 }
3d396eb1 1263
3d396eb1 1264 /* Copy the descriptors into the hardware */
3d396eb1
AK		 1265 hwdesc = &hw->cmd_desc_head[producer];
1266 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
1267 /* Take skb->data itself */
1268 pbuf = &adapter->cmd_buf_arr[producer];
391587c3
DP		 1269
1270 is_tso = netxen_tso_check(netdev, hwdesc, skb);
1271
3d396eb1 1272 pbuf->skb = skb;
3d396eb1 1273 pbuf->frag_count = frag_count;
3d396eb1 1274 buffrag = &pbuf->frag_array[0];
6f703406 1275 temp_dma = pci_map_single(pdev, skb->data, first_seg_len,
3d396eb1 1276 PCI_DMA_TODEVICE);
6f703406
DP		 1277 if (pci_dma_mapping_error(pdev, temp_dma))
1278 goto drop_packet;
1279
1280 buffrag->dma = temp_dma;
3d396eb1 1281 buffrag->length = first_seg_len;
391587c3
DP		 1282 netxen_set_tx_frags_len(hwdesc, frag_count, skb->len);
1283 netxen_set_tx_port(hwdesc, adapter->portnum);
3d396eb1 1284
3d396eb1
AK		 1285 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
1286 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1287
1288 for (i = 1, k = 1; i < frag_count; i++, k++) {
1289 struct skb_frag_struct *frag;
1290 int len, temp_len;
1291 unsigned long offset;
3d396eb1
AK		 1292
1293 /* move to next desc. if there is a need */
1294 if ((i & 0x3) == 0) {
1295 k = 0;
ba53e6b4 1296 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1297 hwdesc = &hw->cmd_desc_head[producer];
1298 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 1299 pbuf = &adapter->cmd_buf_arr[producer];
1300 pbuf->skb = NULL;
3d396eb1
AK		 1301 }
1302 frag = &skb_shinfo(skb)->frags[i - 1];
1303 len = frag->size;
1304 offset = frag->page_offset;
1305
1306 temp_len = len;
6f703406 1307 temp_dma = pci_map_page(pdev, frag->page, offset,
3d396eb1 1308 len, PCI_DMA_TODEVICE);
6f703406
DP		 1309 if (pci_dma_mapping_error(pdev, temp_dma)) {
1310 netxen_clean_tx_dma_mapping(pdev, pbuf, i);
1311 goto drop_packet;
1312 }
3d396eb1
AK		 1313
1314 buffrag++;
1315 buffrag->dma = temp_dma;
1316 buffrag->length = temp_len;
1317
3d396eb1
AK		 1318 switch (k) {
1319 case 0:
1320 hwdesc->buffer1_length = cpu_to_le16(temp_len);
1321 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1322 break;
1323 case 1:
1324 hwdesc->buffer2_length = cpu_to_le16(temp_len);
1325 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1326 break;
1327 case 2:
1328 hwdesc->buffer3_length = cpu_to_le16(temp_len);
1329 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1330 break;
1331 case 3:
a608ab9c 1332 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1333 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1334 break;
1335 }
1336 frag++;
1337 }
ba53e6b4 1338 producer = get_next_index(producer, num_txd);
3d396eb1 1339
3d396eb1
AK		 1340 /* For LSO, we need to copy the MAC/IP/TCP headers into
1341 * the descriptor ring
1342 */
391587c3 1343 if (is_tso) {
3d396eb1 1344 int hdr_len, first_hdr_len, more_hdr;
391587c3 1345 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ed25ffa1
AK		 1346 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1347 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1348 more_hdr = 1;
1349 } else {
1350 first_hdr_len = hdr_len;
1351 more_hdr = 0;
1352 }
1353 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1354 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1355 pbuf = &adapter->cmd_buf_arr[producer];
1356 pbuf->skb = NULL;
3d396eb1
AK		 1357
1358 /* copy the first 64 bytes */
ed25ffa1 1359 memcpy(((void *)hwdesc) + 2,
3d396eb1 1360 (void *)(skb->data), first_hdr_len);
ba53e6b4 1361 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1362
1363 if (more_hdr) {
1364 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1365 pbuf = &adapter->cmd_buf_arr[producer];
1366 pbuf->skb = NULL;
3d396eb1
AK		 1367 /* copy the next 64 bytes - should be enough except
1368 * for pathological case
1369 */
d626f62b
ACM		 1370 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1371 hwdesc,
1372 (hdr_len -
1373 first_hdr_len));
ba53e6b4 1374 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1375 }
1376 }
6c80b18d 1377
ba53e6b4 1378 adapter->cmd_producer = producer;
5dc16268 1379 adapter->stats.txbytes += skb->len;
6c80b18d 1380
ba53e6b4 1381 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
3d396eb1 1382
ba53e6b4 1383 adapter->stats.xmitcalled++;
3d396eb1
AK		 1384 netdev->trans_start = jiffies;
1385
3d396eb1 1386 return NETDEV_TX_OK;
6f703406
DP		 1387
1388drop_packet:
1389 adapter->stats.txdropped++;
1390 dev_kfree_skb_any(skb);
1391 return NETDEV_TX_OK;
3d396eb1
AK		 1392}
1393
a97342f9
DP		 1394static int netxen_nic_check_temp(struct netxen_adapter *adapter)
1395{
1396 struct net_device *netdev = adapter->netdev;
1397 uint32_t temp, temp_state, temp_val;
1398 int rv = 0;
1399
1400 temp = adapter->pci_read_normalize(adapter, CRB_TEMP_STATE);
1401
1402 temp_state = nx_get_temp_state(temp);
1403 temp_val = nx_get_temp_val(temp);
1404
1405 if (temp_state == NX_TEMP_PANIC) {
1406 printk(KERN_ALERT
1407 "%s: Device temperature %d degrees C exceeds"
1408 " maximum allowed. Hardware has been shut down.\n",
1409 netxen_nic_driver_name, temp_val);
1410
1411 netif_carrier_off(netdev);
1412 netif_stop_queue(netdev);
1413 rv = 1;
1414 } else if (temp_state == NX_TEMP_WARN) {
1415 if (adapter->temp == NX_TEMP_NORMAL) {
1416 printk(KERN_ALERT
1417 "%s: Device temperature %d degrees C "
1418 "exceeds operating range."
1419 " Immediate action needed.\n",
1420 netxen_nic_driver_name, temp_val);
1421 }
1422 } else {
1423 if (adapter->temp == NX_TEMP_WARN) {
1424 printk(KERN_INFO
1425 "%s: Device temperature is now %d degrees C"
1426 " in normal range.\n", netxen_nic_driver_name,
1427 temp_val);
1428 }
1429 }
1430 adapter->temp = temp_state;
1431 return rv;
1432}
1433
1434static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
1435{
1436 struct net_device *netdev = adapter->netdev;
1437 u32 val, port, linkup;
1438
1439 port = adapter->physical_port;
1440
24a7a455
DP		 1441 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
1442 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE_P3);
1443 val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
1444 linkup = (val == XG_LINK_UP_P3);
c9fc891f 1445 } else {
24a7a455
DP		 1446 val = adapter->pci_read_normalize(adapter, CRB_XG_STATE);
1447 if (adapter->ahw.board_type == NETXEN_NIC_GBE)
1448 linkup = (val >> port) & 1;
1449 else {
c9fc891f
DP		 1450 val = (val >> port*8) & 0xff;
1451 linkup = (val == XG_LINK_UP);
c9fc891f 1452 }
a97342f9
DP		 1453 }
1454
1455 if (adapter->ahw.linkup && !linkup) {
1456 printk(KERN_INFO "%s: %s NIC Link is down\n",
1457 netxen_nic_driver_name, netdev->name);
1458 adapter->ahw.linkup = 0;
1459 if (netif_running(netdev)) {
1460 netif_carrier_off(netdev);
1461 netif_stop_queue(netdev);
1462 }
c7860a2a
DP		 1463
1464 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1465 } else if (!adapter->ahw.linkup && linkup) {
1466 printk(KERN_INFO "%s: %s NIC Link is up\n",
1467 netxen_nic_driver_name, netdev->name);
1468 adapter->ahw.linkup = 1;
1469 if (netif_running(netdev)) {
1470 netif_carrier_on(netdev);
1471 netif_wake_queue(netdev);
1472 }
c7860a2a
DP		 1473
1474 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1475 }
1476}
1477
3d396eb1
AK		 1478static void netxen_watchdog(unsigned long v)
1479{
1480 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1481
1482 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1483}
1484
a97342f9
DP		 1485void netxen_watchdog_task(struct work_struct *work)
1486{
1487 struct netxen_adapter *adapter =
1488 container_of(work, struct netxen_adapter, watchdog_task);
1489
1490 if ((adapter->portnum == 0) && netxen_nic_check_temp(adapter))
1491 return;
1492
1493 netxen_nic_handle_phy_intr(adapter);
1494
922c4f2c
DP		 1495 if (netif_running(adapter->netdev))
1496 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
a97342f9
DP		 1497}
1498
3d396eb1
AK		 1499static void netxen_tx_timeout(struct net_device *netdev)
1500{
3176ff3e
MT		 1501 struct netxen_adapter *adapter = (struct netxen_adapter *)
1502 netdev_priv(netdev);
1503 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1504}
1505
6d5aefb8 1506static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1507{
4790654c 1508 struct netxen_adapter *adapter =
3176ff3e 1509 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1510
1511 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1512 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1513
ba53e6b4
DP		 1514 netxen_nic_disable_int(adapter);
1515 napi_disable(&adapter->napi);
1516
6c80b18d 1517 adapter->netdev->trans_start = jiffies;
ba53e6b4
DP		 1518
1519 napi_enable(&adapter->napi);
1520 netxen_nic_enable_int(adapter);
6c80b18d 1521 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1522}
1523
a97342f9
DP		 1524/*
1525 * netxen_nic_get_stats - Get System Network Statistics
1526 * @netdev: network interface device structure
1527 */
1528struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
1529{
1530 struct netxen_adapter *adapter = netdev_priv(netdev);
1531 struct net_device_stats *stats = &adapter->net_stats;
1532
1533 memset(stats, 0, sizeof(*stats));
1534
1535 /* total packets received */
1536 stats->rx_packets = adapter->stats.no_rcv;
1537 /* total packets transmitted */
1538 stats->tx_packets = adapter->stats.xmitedframes +
1539 adapter->stats.xmitfinished;
1540 /* total bytes received */
1541 stats->rx_bytes = adapter->stats.rxbytes;
1542 /* total bytes transmitted */
1543 stats->tx_bytes = adapter->stats.txbytes;
1544 /* bad packets received */
1545 stats->rx_errors = adapter->stats.rcvdbadskb;
1546 /* packet transmit problems */
1547 stats->tx_errors = adapter->stats.nocmddescriptor;
1548 /* no space in linux buffers */
1549 stats->rx_dropped = adapter->stats.rxdropped;
1550 /* no space available in linux */
1551 stats->tx_dropped = adapter->stats.txdropped;
1552
1553 return stats;
1554}
1555
e4c93c81 1556static irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1557{
1daec86a 1558 struct netxen_adapter *adapter = data;
d71e1be8
DP		 1559 u32 status = 0;
1560
1561 status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1562
1563 if (!(status & adapter->legacy_intr.int_vec_bit))
05aaa02d 1564 return IRQ_NONE;
e01872af 1565
d71e1be8
DP		 1566 if (adapter->ahw.revision_id >= NX_P3_B1) {
1567 /* check interrupt state machine, to be sure */
1568 status = adapter->pci_read_immediate(adapter,
1569 ISR_INT_STATE_REG);
1570 if (!ISR_LEGACY_INT_TRIGGERED(status))
1571 return IRQ_NONE;
1572
092bc571
DP		 1573 } else {
1574 unsigned long our_int = 0;
d71e1be8
DP		 1575
1576 our_int = adapter->pci_read_normalize(adapter, CRB_INT_VECTOR);
092bc571 1577
d71e1be8 1578 /* not our interrupt */
092bc571 1579 if (!test_and_clear_bit((7 + adapter->portnum), &our_int))
d71e1be8
DP		 1580 return IRQ_NONE;
1581
092bc571
DP		 1582 /* claim interrupt */
1583 adapter->pci_write_normalize(adapter,
1584 CRB_INT_VECTOR, (our_int & 0xffffffff));
e01872af 1585 }
1586
092bc571
DP		 1587 /* clear interrupt */
1588 if (adapter->fw_major < 4)
1589 netxen_nic_disable_int(adapter);
1590
1591 adapter->pci_write_immediate(adapter,
1592 adapter->legacy_intr.tgt_status_reg,
1593 0xffffffff);
1594 /* read twice to ensure write is flushed */
1595 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1596 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1597
1598 napi_schedule(&adapter->napi);
3d396eb1
AK		 1599
1600 return IRQ_HANDLED;
1601}
1602
e4c93c81 1603static irqreturn_t netxen_msi_intr(int irq, void *data)
05aaa02d
DP		 1604{
1605 struct netxen_adapter *adapter = data;
1606
092bc571
DP		 1607 /* clear interrupt */
1608 adapter->pci_write_immediate(adapter,
1609 msi_tgt_status[adapter->ahw.pci_func], 0xffffffff);
1610
1611 napi_schedule(&adapter->napi);
05aaa02d
DP		 1612 return IRQ_HANDLED;
1613}
1614
bea3348e 1615static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1616{
bea3348e 1617 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
05aaa02d 1618 int tx_complete;
3d396eb1 1619 int ctx;
bea3348e 1620 int work_done;
3d396eb1 1621
05aaa02d 1622 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1623
80922fbc 1624 work_done = 0;
3d396eb1
AK		 1625 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1626 /*
1627 * Fairness issue. This will give undue weight to the
1628 * receive context 0.
1629 */
1630
1631 /*
1632 * To avoid starvation, we give each of our receivers,
1633 * a fraction of the quota. Sometimes, it might happen that we
1634 * have enough quota to process every packet, but since all the
1635 * packets are on one context, it gets only half of the quota,
1636 * and ends up not processing it.
1637 */
bea3348e
SH		 1638 work_done += netxen_process_rcv_ring(adapter, ctx,
1639 budget / MAX_RCV_CTX);
3d396eb1
AK		 1640 }
1641
05aaa02d 1642 if ((work_done < budget) && tx_complete) {
288379f0 1643 napi_complete(&adapter->napi);
3d396eb1
AK		 1644 netxen_nic_enable_int(adapter);
1645 }
1646
bea3348e 1647 return work_done;
3d396eb1
AK		 1648}
1649
1650#ifdef CONFIG_NET_POLL_CONTROLLER
1651static void netxen_nic_poll_controller(struct net_device *netdev)
1652{
3176ff3e 1653 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1654 disable_irq(adapter->irq);
1494a814 1655 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1656 enable_irq(adapter->irq);
1657}
1658#endif
3d396eb1
AK		 1659
1660static struct pci_driver netxen_driver = {
1661 .name = netxen_nic_driver_name,
1662 .id_table = netxen_pci_tbl,
1663 .probe = netxen_nic_probe,
1664 .remove = __devexit_p(netxen_nic_remove)
1665};
1666
1667/* Driver Registration on NetXen card */
1668
1669static int __init netxen_init_module(void)
1670{
79ea13ce 1671 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1672 return -ENOMEM;
1673
184231bd 1674 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1675}
1676
1677module_init(netxen_init_module);
1678
1679static void __exit netxen_exit_module(void)
1680{
3d396eb1 1681 pci_unregister_driver(&netxen_driver);
9de06610 1682 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1683}
1684
1685module_exit(netxen_exit_module);
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