projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
netxen: fix race in tx ring acccess
[linux-2.6-block.git] / drivers / net / netxen / netxen_nic_main.c
CommitLineData
3d396eb1 1/*
5d242f1c 2 * Copyright (C) 2003 - 2009 NetXen, Inc.
3d396eb1 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
5d242f1c
DP		 25 * NetXen Inc,
26 * 18922 Forge Drive
27 * Cupertino, CA 95014-0701
3d396eb1
AK		 28 *
29 */
30
cb8011ad 31#include <linux/vmalloc.h>
e98e3350 32#include <linux/interrupt.h>
3d396eb1
AK		 33#include "netxen_nic_hw.h"
34
35#include "netxen_nic.h"
3d396eb1 36#include "netxen_nic_phan_reg.h"
3d396eb1 37
1494a814 38#include <linux/dma-mapping.h>
391587c3 39#include <linux/if_vlan.h>
c9bdd4b5 40#include <net/ip.h>
00977784 41#include <linux/ipv6.h>
1494a814 42
3d396eb1
AK		 43MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
44MODULE_LICENSE("GPL");
45MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
46
ceded32f 47char netxen_nic_driver_name[] = "netxen_nic";
3d396eb1 48static char netxen_nic_driver_string[] = "NetXen Network Driver version "
cb8011ad 49 NETXEN_NIC_LINUX_VERSIONID;
3d396eb1 50
2956640d
DP		 51static int port_mode = NETXEN_PORT_MODE_AUTO_NEG;
52
53/* Default to restricted 1G auto-neg mode */
54static int wol_port_mode = 5;
55
56static int use_msi = 1;
57
58static int use_msi_x = 1;
59
3d396eb1
AK		 60/* Local functions to NetXen NIC driver */
61static int __devinit netxen_nic_probe(struct pci_dev *pdev,
2956640d 62 const struct pci_device_id *ent);
3d396eb1
AK		 63static void __devexit netxen_nic_remove(struct pci_dev *pdev);
64static int netxen_nic_open(struct net_device *netdev);
65static int netxen_nic_close(struct net_device *netdev);
66static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
67static void netxen_tx_timeout(struct net_device *netdev);
6d5aefb8 68static void netxen_tx_timeout_task(struct work_struct *work);
3d396eb1 69static void netxen_watchdog(unsigned long);
bea3348e 70static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 71#ifdef CONFIG_NET_POLL_CONTROLLER
72static void netxen_nic_poll_controller(struct net_device *netdev);
73#endif
1494a814 74static irqreturn_t netxen_intr(int irq, void *data);
05aaa02d 75static irqreturn_t netxen_msi_intr(int irq, void *data);
b3df68f8 76static irqreturn_t netxen_msix_intr(int irq, void *data);
3d396eb1
AK		 77
78/* PCI Device ID Table */
70081ac5 79#define ENTRY(device) \
040dec3b 80 {PCI_DEVICE(PCI_VENDOR_ID_NETXEN, (device)), \
70081ac5
AV		 81 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
82
3d396eb1 83static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
040dec3b
DP		 84 ENTRY(PCI_DEVICE_ID_NX2031_10GXSR),
85 ENTRY(PCI_DEVICE_ID_NX2031_10GCX4),
86 ENTRY(PCI_DEVICE_ID_NX2031_4GCU),
87 ENTRY(PCI_DEVICE_ID_NX2031_IMEZ),
88 ENTRY(PCI_DEVICE_ID_NX2031_HMEZ),
89 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT),
90 ENTRY(PCI_DEVICE_ID_NX2031_XG_MGMT2),
91 ENTRY(PCI_DEVICE_ID_NX3031),
3d396eb1
AK		 92 {0,}
93};
94
95MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
96
b1555130
AB		 97static struct workqueue_struct *netxen_workq;
98#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
99#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
100
ed25ffa1
AK		 101static void netxen_watchdog(unsigned long);
102
7830b22c
DP		 103static uint32_t crb_cmd_producer[4] = {
104 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
105 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
106};
107
c9fc891f 108void
3ce06a32 109netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
d877f1e3 110 struct nx_host_tx_ring *tx_ring, u32 producer)
3176ff3e 111{
f98a9f69 112 NXWR32(adapter, tx_ring->crb_cmd_producer, producer);
3176ff3e
MT		 113}
114
7830b22c
DP		 115static uint32_t crb_cmd_consumer[4] = {
116 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
117 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
118};
119
3ce06a32
DP		 120static inline void
121netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
d877f1e3 122 struct nx_host_tx_ring *tx_ring, u32 consumer)
3176ff3e 123{
f98a9f69 124 NXWR32(adapter, tx_ring->crb_cmd_consumer, consumer);
3176ff3e
MT		 125}
126
2956640d 127static uint32_t msi_tgt_status[8] = {
443be796 128 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
2956640d
DP		 129 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3,
130 ISR_INT_TARGET_STATUS_F4, ISR_INT_TARGET_STATUS_F5,
131 ISR_INT_TARGET_STATUS_F6, ISR_INT_TARGET_STATUS_F7
443be796
DP		 132};
133
2956640d
DP		 134static struct netxen_legacy_intr_set legacy_intr[] = NX_LEGACY_INTR_CONFIG;
135
d8b100c5 136static inline void netxen_nic_disable_int(struct nx_host_sds_ring *sds_ring)
4638aef1 137{
d8b100c5
DP		 138 struct netxen_adapter *adapter = sds_ring->adapter;
139
f98a9f69 140 NXWR32(adapter, sds_ring->crb_intr_mask, 0);
4638aef1
SH		 141}
142
d8b100c5 143static inline void netxen_nic_enable_int(struct nx_host_sds_ring *sds_ring)
4638aef1 144{
d8b100c5
DP		 145 struct netxen_adapter *adapter = sds_ring->adapter;
146
f98a9f69 147 NXWR32(adapter, sds_ring->crb_intr_mask, 0x1);
4638aef1 148
092bc571
DP		 149 if (!NETXEN_IS_MSI_FAMILY(adapter))
150 adapter->pci_write_immediate(adapter,
151 adapter->legacy_intr.tgt_mask_reg, 0xfbff);
4638aef1
SH		 152}
153
71dcddbd
DP		 154static int
155netxen_alloc_sds_rings(struct netxen_recv_context *recv_ctx, int count)
156{
157 int size = sizeof(struct nx_host_sds_ring) * count;
158
159 recv_ctx->sds_rings = kzalloc(size, GFP_KERNEL);
160
161 return (recv_ctx->sds_rings == NULL);
162}
163
d8b100c5 164static void
71dcddbd
DP		 165netxen_free_sds_rings(struct netxen_recv_context *recv_ctx)
166{
167 if (recv_ctx->sds_rings != NULL)
168 kfree(recv_ctx->sds_rings);
169}
170
171static int
d8b100c5
DP		 172netxen_napi_add(struct netxen_adapter *adapter, struct net_device *netdev)
173{
174 int ring;
175 struct nx_host_sds_ring *sds_ring;
176 struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
177
f6d21f44
DP		 178 if ((adapter->flags & NETXEN_NIC_MSIX_ENABLED) &&
179 adapter->rss_supported)
d8b100c5
DP		 180 adapter->max_sds_rings = (num_online_cpus() >= 4) ? 4 : 2;
181 else
182 adapter->max_sds_rings = 1;
183
71dcddbd
DP		 184 if (netxen_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
185 return 1;
186
d8b100c5
DP		 187 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
188 sds_ring = &recv_ctx->sds_rings[ring];
189 netif_napi_add(netdev, &sds_ring->napi,
190 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
191 }
71dcddbd
DP		 192
193 return 0;
d8b100c5
DP		 194}
195
196static void
197netxen_napi_enable(struct netxen_adapter *adapter)
198{
199 int ring;
200 struct nx_host_sds_ring *sds_ring;
201 struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
202
203 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
204 sds_ring = &recv_ctx->sds_rings[ring];
205 napi_enable(&sds_ring->napi);
206 netxen_nic_enable_int(sds_ring);
207 }
208}
209
210static void
211netxen_napi_disable(struct netxen_adapter *adapter)
212{
213 int ring;
214 struct nx_host_sds_ring *sds_ring;
215 struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
216
217 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
218 sds_ring = &recv_ctx->sds_rings[ring];
219 netxen_nic_disable_int(sds_ring);
220 napi_disable(&sds_ring->napi);
221 }
222}
223
2956640d
DP		 224static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
225{
226 struct pci_dev *pdev = adapter->pdev;
1f434f63
DP		 227 uint64_t mask, cmask;
228
229 adapter->pci_using_dac = 0;
2956640d 230
6afd142f 231 mask = DMA_BIT_MASK(32);
2956640d
DP		 232 /*
233 * Consistent DMA mask is set to 32 bit because it cannot be set to
234 * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
235 * come off this pool.
236 */
6afd142f 237 cmask = DMA_BIT_MASK(32);
1f434f63
DP		 238
239#ifndef CONFIG_IA64
240 if (revision_id >= NX_P3_B0)
6afd142f 241 mask = DMA_BIT_MASK(39);
1f434f63 242 else if (revision_id == NX_P2_C1)
6afd142f 243 mask = DMA_BIT_MASK(35);
1f434f63 244#endif
2956640d 245 if (pci_set_dma_mask(pdev, mask) == 0 &&
1f434f63 246 pci_set_consistent_dma_mask(pdev, cmask) == 0) {
2956640d
DP		 247 adapter->pci_using_dac = 1;
248 return 0;
249 }
2956640d 250
1f434f63
DP		 251 return -EIO;
252}
253
254/* Update addressable range if firmware supports it */
255static int
256nx_update_dma_mask(struct netxen_adapter *adapter)
257{
258 int change, shift, err;
259 uint64_t mask, old_mask;
260 struct pci_dev *pdev = adapter->pdev;
261
262 change = 0;
263
f98a9f69 264 shift = NXRD32(adapter, CRB_DMA_SHIFT);
1f434f63
DP		 265 if (shift >= 32)
266 return 0;
267
268 if (NX_IS_REVISION_P3(adapter->ahw.revision_id) && (shift > 9))
269 change = 1;
270 else if ((adapter->ahw.revision_id == NX_P2_C1) && (shift <= 4))
271 change = 1;
272
273 if (change) {
274 old_mask = pdev->dma_mask;
275 mask = (1ULL<<(32+shift)) - 1;
276
277 err = pci_set_dma_mask(pdev, mask);
278 if (err)
279 return pci_set_dma_mask(pdev, old_mask);
2956640d
DP		 280 }
281
2956640d
DP		 282 return 0;
283}
284
285static void netxen_check_options(struct netxen_adapter *adapter)
286{
438627c7
DP		 287 if (adapter->ahw.port_type == NETXEN_NIC_XGBE)
288 adapter->num_rxd = MAX_RCV_DESCRIPTORS_10G;
289 else if (adapter->ahw.port_type == NETXEN_NIC_GBE)
290 adapter->num_rxd = MAX_RCV_DESCRIPTORS_1G;
2956640d 291
f6d21f44
DP		 292 adapter->msix_supported = 0;
293 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
c7860a2a 294 adapter->msix_supported = !!use_msi_x;
f6d21f44
DP		 295 adapter->rss_supported = !!use_msi_x;
296 } else if (adapter->fw_version >= NETXEN_VERSION_CODE(3, 4, 336)) {
297 switch (adapter->ahw.board_type) {
298 case NETXEN_BRDTYPE_P2_SB31_10G:
299 case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
300 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
301 adapter->msix_supported = !!use_msi_x;
302 adapter->rss_supported = !!use_msi_x;
303 break;
304 default:
305 break;
306 }
307 }
2956640d 308
438627c7
DP		 309 adapter->num_txd = MAX_CMD_DESCRIPTORS_HOST;
310 adapter->num_jumbo_rxd = MAX_JUMBO_RCV_DESCRIPTORS;
311 adapter->num_lro_rxd = MAX_LRO_RCV_DESCRIPTORS;
2956640d 312
2956640d
DP		 313 return;
314}
315
316static int
317netxen_check_hw_init(struct netxen_adapter *adapter, int first_boot)
318{
27c915a4 319 u32 val, timeout;
2956640d
DP		 320
321 if (first_boot == 0x55555555) {
322 /* This is the first boot after power up */
f98a9f69 323 NXWR32(adapter, NETXEN_CAM_RAM(0x1fc), NETXEN_BDINFO_MAGIC);
27c915a4
DP		 324
325 if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
326 return 0;
2956640d
DP		 327
328 /* PCI bus master workaround */
f98a9f69 329 first_boot = NXRD32(adapter, NETXEN_PCIE_REG(0x4));
2956640d
DP		 330 if (!(first_boot & 0x4)) {
331 first_boot |= 0x4;
f98a9f69
DP		 332 NXWR32(adapter, NETXEN_PCIE_REG(0x4), first_boot);
333 first_boot = NXRD32(adapter, NETXEN_PCIE_REG(0x4));
2956640d
DP		 334 }
335
336 /* This is the first boot after power up */
f98a9f69 337 first_boot = NXRD32(adapter, NETXEN_ROMUSB_GLB_SW_RESET);
2956640d
DP		 338 if (first_boot != 0x80000f) {
339 /* clear the register for future unloads/loads */
f98a9f69 340 NXWR32(adapter, NETXEN_CAM_RAM(0x1fc), 0);
27c915a4 341 return -EIO;
2956640d
DP		 342 }
343
27c915a4 344 /* Start P2 boot loader */
f98a9f69
DP		 345 val = NXRD32(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE);
346 NXWR32(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE, val | 0x1);
27c915a4
DP		 347 timeout = 0;
348 do {
349 msleep(1);
f98a9f69 350 val = NXRD32(adapter, NETXEN_CAM_RAM(0x1fc));
27c915a4
DP		 351
352 if (++timeout > 5000)
353 return -EIO;
354
355 } while (val == NETXEN_BDINFO_MAGIC);
2956640d 356 }
27c915a4 357 return 0;
2956640d
DP		 358}
359
360static void netxen_set_port_mode(struct netxen_adapter *adapter)
361{
362 u32 val, data;
363
1e2d0059 364 val = adapter->ahw.board_type;
2956640d
DP		 365 if ((val == NETXEN_BRDTYPE_P3_HMEZ) ||
366 (val == NETXEN_BRDTYPE_P3_XG_LOM)) {
367 if (port_mode == NETXEN_PORT_MODE_802_3_AP) {
368 data = NETXEN_PORT_MODE_802_3_AP;
f98a9f69 369 NXWR32(adapter, NETXEN_PORT_MODE_ADDR, data);
2956640d
DP		 370 } else if (port_mode == NETXEN_PORT_MODE_XG) {
371 data = NETXEN_PORT_MODE_XG;
f98a9f69 372 NXWR32(adapter, NETXEN_PORT_MODE_ADDR, data);
2956640d
DP		 373 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_1G) {
374 data = NETXEN_PORT_MODE_AUTO_NEG_1G;
f98a9f69 375 NXWR32(adapter, NETXEN_PORT_MODE_ADDR, data);
2956640d
DP		 376 } else if (port_mode == NETXEN_PORT_MODE_AUTO_NEG_XG) {
377 data = NETXEN_PORT_MODE_AUTO_NEG_XG;
f98a9f69 378 NXWR32(adapter, NETXEN_PORT_MODE_ADDR, data);
2956640d
DP		 379 } else {
380 data = NETXEN_PORT_MODE_AUTO_NEG;
f98a9f69 381 NXWR32(adapter, NETXEN_PORT_MODE_ADDR, data);
2956640d
DP		 382 }
383
384 if ((wol_port_mode != NETXEN_PORT_MODE_802_3_AP) &&
385 (wol_port_mode != NETXEN_PORT_MODE_XG) &&
386 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_1G) &&
387 (wol_port_mode != NETXEN_PORT_MODE_AUTO_NEG_XG)) {
388 wol_port_mode = NETXEN_PORT_MODE_AUTO_NEG;
389 }
f98a9f69 390 NXWR32(adapter, NETXEN_WOL_PORT_MODE, wol_port_mode);
2956640d
DP		 391 }
392}
393
2956640d
DP		 394static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
395{
396 u32 control;
397 int pos;
398
399 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
400 if (pos) {
401 pci_read_config_dword(pdev, pos, &control);
402 if (enable)
403 control |= PCI_MSIX_FLAGS_ENABLE;
404 else
405 control = 0;
406 pci_write_config_dword(pdev, pos, control);
407 }
408}
409
410static void netxen_init_msix_entries(struct netxen_adapter *adapter)
411{
412 int i;
413
414 for (i = 0; i < MSIX_ENTRIES_PER_ADAPTER; i++)
415 adapter->msix_entries[i].entry = i;
416}
417
9dc28efe
DP		 418static int
419netxen_read_mac_addr(struct netxen_adapter *adapter)
420{
421 int i;
422 unsigned char *p;
423 __le64 mac_addr;
9dc28efe
DP		 424 struct net_device *netdev = adapter->netdev;
425 struct pci_dev *pdev = adapter->pdev;
426
9dc28efe
DP		 427 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
428 if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
429 return -EIO;
430 } else {
431 if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
432 return -EIO;
433 }
434
435 p = (unsigned char *)&mac_addr;
436 for (i = 0; i < 6; i++)
437 netdev->dev_addr[i] = *(p + 5 - i);
438
439 memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
440
441 /* set station address */
442
e174961c
JB		 443 if (!is_valid_ether_addr(netdev->perm_addr))
444 dev_warn(&pdev->dev, "Bad MAC address %pM.\n", netdev->dev_addr);
445 else
9dc28efe
DP		 446 adapter->macaddr_set(adapter, netdev->dev_addr);
447
448 return 0;
449}
450
1abd266f
SH		 451static void netxen_set_multicast_list(struct net_device *dev)
452{
453 struct netxen_adapter *adapter = netdev_priv(dev);
454
455 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
456 netxen_p3_nic_set_multi(dev);
457 else
458 netxen_p2_nic_set_multi(dev);
459}
460
461static const struct net_device_ops netxen_netdev_ops = {
462 .ndo_open = netxen_nic_open,
463 .ndo_stop = netxen_nic_close,
464 .ndo_start_xmit = netxen_nic_xmit_frame,
465 .ndo_get_stats = netxen_nic_get_stats,
466 .ndo_validate_addr = eth_validate_addr,
467 .ndo_set_multicast_list = netxen_set_multicast_list,
468 .ndo_set_mac_address = netxen_nic_set_mac,
469 .ndo_change_mtu = netxen_nic_change_mtu,
470 .ndo_tx_timeout = netxen_tx_timeout,
471#ifdef CONFIG_NET_POLL_CONTROLLER
472 .ndo_poll_controller = netxen_nic_poll_controller,
473#endif
474};
475
97daee83
DP		 476static void
477netxen_setup_intr(struct netxen_adapter *adapter)
478{
479 struct netxen_legacy_intr_set *legacy_intrp;
480 struct pci_dev *pdev = adapter->pdev;
481
482 adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);
97daee83
DP		 483
484 if (adapter->ahw.revision_id >= NX_P3_B0)
485 legacy_intrp = &legacy_intr[adapter->ahw.pci_func];
486 else
487 legacy_intrp = &legacy_intr[0];
488 adapter->legacy_intr.int_vec_bit = legacy_intrp->int_vec_bit;
489 adapter->legacy_intr.tgt_status_reg = legacy_intrp->tgt_status_reg;
490 adapter->legacy_intr.tgt_mask_reg = legacy_intrp->tgt_mask_reg;
491 adapter->legacy_intr.pci_int_reg = legacy_intrp->pci_int_reg;
492
493 netxen_set_msix_bit(pdev, 0);
494
495 if (adapter->msix_supported) {
496
497 netxen_init_msix_entries(adapter);
498 if (pci_enable_msix(pdev, adapter->msix_entries,
499 MSIX_ENTRIES_PER_ADAPTER))
500 goto request_msi;
501
502 adapter->flags |= NETXEN_NIC_MSIX_ENABLED;
503 netxen_set_msix_bit(pdev, 1);
504 dev_info(&pdev->dev, "using msi-x interrupts\n");
505
506 } else {
507request_msi:
508 if (use_msi && !pci_enable_msi(pdev)) {
509 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
510 dev_info(&pdev->dev, "using msi interrupts\n");
511 } else
512 dev_info(&pdev->dev, "using legacy interrupts\n");
d8b100c5 513 adapter->msix_entries[0].vector = pdev->irq;
97daee83
DP		 514 }
515}
516
517static void
518netxen_teardown_intr(struct netxen_adapter *adapter)
519{
520 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
521 pci_disable_msix(adapter->pdev);
522 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
523 pci_disable_msi(adapter->pdev);
524}
525
526static void
527netxen_cleanup_pci_map(struct netxen_adapter *adapter)
528{
529 if (adapter->ahw.db_base != NULL)
530 iounmap(adapter->ahw.db_base);
531 if (adapter->ahw.pci_base0 != NULL)
532 iounmap(adapter->ahw.pci_base0);
533 if (adapter->ahw.pci_base1 != NULL)
534 iounmap(adapter->ahw.pci_base1);
535 if (adapter->ahw.pci_base2 != NULL)
536 iounmap(adapter->ahw.pci_base2);
537}
538
539static int
540netxen_setup_pci_map(struct netxen_adapter *adapter)
541{
542 void __iomem *mem_ptr0 = NULL;
543 void __iomem *mem_ptr1 = NULL;
544 void __iomem *mem_ptr2 = NULL;
545 void __iomem *db_ptr = NULL;
546
97daee83
DP		 547 unsigned long mem_base, mem_len, db_base, db_len = 0, pci_len0 = 0;
548
549 struct pci_dev *pdev = adapter->pdev;
550 int pci_func = adapter->ahw.pci_func;
551
552 int err = 0;
553
554 /*
555 * Set the CRB window to invalid. If any register in window 0 is
556 * accessed it should set the window to 0 and then reset it to 1.
557 */
558 adapter->curr_window = 255;
559 adapter->ahw.qdr_sn_window = -1;
560 adapter->ahw.ddr_mn_window = -1;
561
562 /* remap phys address */
563 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
564 mem_len = pci_resource_len(pdev, 0);
565 pci_len0 = 0;
566
567 adapter->hw_write_wx = netxen_nic_hw_write_wx_128M;
568 adapter->hw_read_wx = netxen_nic_hw_read_wx_128M;
569 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_128M;
570 adapter->pci_write_immediate = netxen_nic_pci_write_immediate_128M;
97daee83
DP		 571 adapter->pci_set_window = netxen_nic_pci_set_window_128M;
572 adapter->pci_mem_read = netxen_nic_pci_mem_read_128M;
573 adapter->pci_mem_write = netxen_nic_pci_mem_write_128M;
574
575 /* 128 Meg of memory */
576 if (mem_len == NETXEN_PCI_128MB_SIZE) {
577 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
578 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
579 SECOND_PAGE_GROUP_SIZE);
580 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
581 THIRD_PAGE_GROUP_SIZE);
97daee83
DP		 582 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
583 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
584 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
585 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
97daee83
DP		 586 } else if (mem_len == NETXEN_PCI_2MB_SIZE) {
587 adapter->hw_write_wx = netxen_nic_hw_write_wx_2M;
588 adapter->hw_read_wx = netxen_nic_hw_read_wx_2M;
589 adapter->pci_read_immediate = netxen_nic_pci_read_immediate_2M;
590 adapter->pci_write_immediate =
591 netxen_nic_pci_write_immediate_2M;
97daee83
DP		 592 adapter->pci_set_window = netxen_nic_pci_set_window_2M;
593 adapter->pci_mem_read = netxen_nic_pci_mem_read_2M;
594 adapter->pci_mem_write = netxen_nic_pci_mem_write_2M;
595
596 mem_ptr0 = pci_ioremap_bar(pdev, 0);
597 if (mem_ptr0 == NULL) {
598 dev_err(&pdev->dev, "failed to map PCI bar 0\n");
599 return -EIO;
600 }
601 pci_len0 = mem_len;
97daee83
DP		 602
603 adapter->ahw.ddr_mn_window = 0;
604 adapter->ahw.qdr_sn_window = 0;
605
606 adapter->ahw.mn_win_crb = 0x100000 + PCIX_MN_WINDOW +
607 (pci_func * 0x20);
608 adapter->ahw.ms_win_crb = 0x100000 + PCIX_SN_WINDOW;
609 if (pci_func < 4)
610 adapter->ahw.ms_win_crb += (pci_func * 0x20);
611 else
612 adapter->ahw.ms_win_crb +=
613 0xA0 + ((pci_func - 4) * 0x10);
614 } else {
615 return -EIO;
616 }
617
618 dev_info(&pdev->dev, "%dMB memory map\n", (int)(mem_len>>20));
619
620 adapter->ahw.pci_base0 = mem_ptr0;
621 adapter->ahw.pci_len0 = pci_len0;
97daee83
DP		 622 adapter->ahw.pci_base1 = mem_ptr1;
623 adapter->ahw.pci_base2 = mem_ptr2;
624
625 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
626 goto skip_doorbell;
627
628 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
629 db_len = pci_resource_len(pdev, 4);
630
631 if (db_len == 0) {
632 printk(KERN_ERR "%s: doorbell is disabled\n",
633 netxen_nic_driver_name);
634 err = -EIO;
635 goto err_out;
636 }
637
638 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
639 if (!db_ptr) {
640 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
641 netxen_nic_driver_name);
642 err = -EIO;
643 goto err_out;
644 }
645
646skip_doorbell:
647 adapter->ahw.db_base = db_ptr;
648 adapter->ahw.db_len = db_len;
649 return 0;
650
651err_out:
652 netxen_cleanup_pci_map(adapter);
653 return err;
654}
655
ba599d4f 656static int
f7185c71 657netxen_start_firmware(struct netxen_adapter *adapter, int request_fw)
ba599d4f
DP		 658{
659 int val, err, first_boot;
660 struct pci_dev *pdev = adapter->pdev;
661
0b72e659 662 int first_driver = 0;
f7185c71
DP		 663
664 if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
665 first_driver = (adapter->portnum == 0);
666 else
667 first_driver = (adapter->ahw.pci_func == 0);
0b72e659
DP		 668
669 if (!first_driver)
670 return 0;
671
f98a9f69 672 first_boot = NXRD32(adapter, NETXEN_CAM_RAM(0x1fc));
ba599d4f
DP		 673
674 err = netxen_check_hw_init(adapter, first_boot);
675 if (err) {
676 dev_err(&pdev->dev, "error in init HW init sequence\n");
677 return err;
678 }
679
f7185c71
DP		 680 if (request_fw)
681 netxen_request_firmware(adapter);
682
ba599d4f 683 if (first_boot != 0x55555555) {
f98a9f69 684 NXWR32(adapter, CRB_CMDPEG_STATE, 0);
ba599d4f
DP		 685 netxen_pinit_from_rom(adapter, 0);
686 msleep(1);
687 }
567c6c4e 688
f98a9f69 689 NXWR32(adapter, CRB_DMA_SHIFT, 0x55555555);
567c6c4e
DP		 690 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
691 netxen_set_port_mode(adapter);
692
ba599d4f
DP		 693 netxen_load_firmware(adapter);
694
695 if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
696
697 /* Initialize multicast addr pool owners */
698 val = 0x7654;
1e2d0059 699 if (adapter->ahw.port_type == NETXEN_NIC_XGBE)
ba599d4f 700 val |= 0x0f000000;
f98a9f69 701 NXWR32(adapter, NETXEN_MAC_ADDR_CNTL_REG, val);
ba599d4f
DP		 702
703 }
704
705 err = netxen_initialize_adapter_offload(adapter);
706 if (err)
707 return err;
708
709 /*
710 * Tell the hardware our version number.
711 */
712 val = (_NETXEN_NIC_LINUX_MAJOR << 16)
713 | ((_NETXEN_NIC_LINUX_MINOR << 8))
714 | (_NETXEN_NIC_LINUX_SUBVERSION);
f98a9f69 715 NXWR32(adapter, CRB_DRIVER_VERSION, val);
ba599d4f
DP		 716
717 /* Handshake with the card before we register the devices. */
718 err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
719 if (err) {
720 netxen_free_adapter_offload(adapter);
721 return err;
722 }
723
724 return 0;
725}
726
9f5bc7f1
DP		 727static int
728netxen_nic_request_irq(struct netxen_adapter *adapter)
729{
730 irq_handler_t handler;
d8b100c5
DP		 731 struct nx_host_sds_ring *sds_ring;
732 int err, ring;
733
9f5bc7f1
DP		 734 unsigned long flags = IRQF_SAMPLE_RANDOM;
735 struct net_device *netdev = adapter->netdev;
d8b100c5 736 struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
9f5bc7f1 737
9f5bc7f1
DP		 738 if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
739 handler = netxen_msix_intr;
740 else if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
741 handler = netxen_msi_intr;
742 else {
743 flags |= IRQF_SHARED;
744 handler = netxen_intr;
745 }
746 adapter->irq = netdev->irq;
747
d8b100c5
DP		 748 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
749 sds_ring = &recv_ctx->sds_rings[ring];
750 sprintf(sds_ring->name, "%16s[%d]", netdev->name, ring);
751 err = request_irq(sds_ring->irq, handler,
752 flags, sds_ring->name, sds_ring);
753 if (err)
754 return err;
755 }
756
757 return 0;
758}
759
760static void
761netxen_nic_free_irq(struct netxen_adapter *adapter)
762{
763 int ring;
764 struct nx_host_sds_ring *sds_ring;
765
766 struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
767
768 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
769 sds_ring = &recv_ctx->sds_rings[ring];
770 free_irq(sds_ring->irq, sds_ring);
771 }
9f5bc7f1
DP		 772}
773
774static int
775netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev)
776{
777 int err;
778
779 err = adapter->init_port(adapter, adapter->physical_port);
780 if (err) {
781 printk(KERN_ERR "%s: Failed to initialize port %d\n",
782 netxen_nic_driver_name, adapter->portnum);
783 return err;
784 }
785 adapter->macaddr_set(adapter, netdev->dev_addr);
786
787 netxen_nic_set_link_parameters(adapter);
788
789 netxen_set_multicast_list(netdev);
790 if (adapter->set_mtu)
791 adapter->set_mtu(adapter, netdev->mtu);
792
793 adapter->ahw.linkup = 0;
794 mod_timer(&adapter->watchdog_timer, jiffies);
795
d8b100c5
DP		 796 netxen_napi_enable(adapter);
797
798 if (adapter->max_sds_rings > 1)
799 netxen_config_rss(adapter, 1);
9f5bc7f1 800
5103c9f7 801 if (adapter->capabilities & NX_FW_CAPABILITY_LINK_NOTIFICATION)
3bf26ce3
DP		 802 netxen_linkevent_request(adapter, 1);
803
9f5bc7f1
DP		 804 return 0;
805}
806
807static void
808netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev)
809{
810 netif_carrier_off(netdev);
811 netif_stop_queue(netdev);
22527864 812 smp_mb();
d8b100c5 813 netxen_napi_disable(adapter);
9f5bc7f1
DP		 814
815 if (adapter->stop_port)
816 adapter->stop_port(adapter);
817
9f5bc7f1
DP		 818 netxen_release_tx_buffers(adapter);
819
820 FLUSH_SCHEDULED_WORK();
821 del_timer_sync(&adapter->watchdog_timer);
822}
823
824
825static int
826netxen_nic_attach(struct netxen_adapter *adapter)
827{
828 struct net_device *netdev = adapter->netdev;
829 struct pci_dev *pdev = adapter->pdev;
becf46a0 830 int err, ring;
d8b100c5 831 struct nx_host_rds_ring *rds_ring;
d877f1e3 832 struct nx_host_tx_ring *tx_ring;
9f5bc7f1
DP		 833
834 err = netxen_init_firmware(adapter);
835 if (err != 0) {
836 printk(KERN_ERR "Failed to init firmware\n");
837 return -EIO;
838 }
839
840 if (adapter->fw_major < 4)
841 adapter->max_rds_rings = 3;
842 else
843 adapter->max_rds_rings = 2;
844
845 err = netxen_alloc_sw_resources(adapter);
846 if (err) {
847 printk(KERN_ERR "%s: Error in setting sw resources\n",
848 netdev->name);
849 return err;
850 }
851
852 netxen_nic_clear_stats(adapter);
853
854 err = netxen_alloc_hw_resources(adapter);
855 if (err) {
856 printk(KERN_ERR "%s: Error in setting hw resources\n",
857 netdev->name);
858 goto err_out_free_sw;
859 }
860
861 if (adapter->fw_major < 4) {
4ea528a1 862 tx_ring = adapter->tx_ring;
d877f1e3
DP		 863 tx_ring->crb_cmd_producer = crb_cmd_producer[adapter->portnum];
864 tx_ring->crb_cmd_consumer = crb_cmd_consumer[adapter->portnum];
9f5bc7f1 865
d877f1e3
DP		 866 netxen_nic_update_cmd_producer(adapter, tx_ring, 0);
867 netxen_nic_update_cmd_consumer(adapter, tx_ring, 0);
9f5bc7f1
DP		 868 }
869
d8b100c5
DP		 870 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
871 rds_ring = &adapter->recv_ctx.rds_rings[ring];
872 netxen_post_rx_buffers(adapter, ring, rds_ring);
873 }
9f5bc7f1
DP		 874
875 err = netxen_nic_request_irq(adapter);
876 if (err) {
877 dev_err(&pdev->dev, "%s: failed to setup interrupt\n",
878 netdev->name);
879 goto err_out_free_rxbuf;
880 }
881
882 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
883 return 0;
884
885err_out_free_rxbuf:
886 netxen_release_rx_buffers(adapter);
887 netxen_free_hw_resources(adapter);
888err_out_free_sw:
889 netxen_free_sw_resources(adapter);
890 return err;
891}
892
893static void
894netxen_nic_detach(struct netxen_adapter *adapter)
895{
d8b100c5 896 netxen_nic_free_irq(adapter);
9f5bc7f1
DP		 897
898 netxen_release_rx_buffers(adapter);
899 netxen_free_hw_resources(adapter);
900 netxen_free_sw_resources(adapter);
901
902 adapter->is_up = 0;
903}
904
3d396eb1
AK		 905static int __devinit
906netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
907{
908 struct net_device *netdev = NULL;
909 struct netxen_adapter *adapter = NULL;
2956640d 910 int i = 0, err;
3176ff3e 911 int pci_func_id = PCI_FUNC(pdev->devfn);
2956640d 912 uint8_t revision_id;
3d396eb1 913
3176ff3e 914 if (pdev->class != 0x020000) {
dcd56fdb 915 printk(KERN_DEBUG "NetXen function %d, class %x will not "
3176ff3e 916 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 917 return -ENODEV;
918 }
2956640d 919
11d89d63
DP		 920 if (pdev->revision >= NX_P3_A0 && pdev->revision < NX_P3_B1) {
921 printk(KERN_WARNING "NetXen chip revisions between 0x%x-0x%x"
922 "will not be enabled.\n",
923 NX_P3_A0, NX_P3_B1);
924 return -ENODEV;
925 }
926
3d396eb1
AK		 927 if ((err = pci_enable_device(pdev)))
928 return err;
2956640d 929
3d396eb1
AK		 930 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
931 err = -ENODEV;
932 goto err_out_disable_pdev;
933 }
934
935 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
936 goto err_out_disable_pdev;
937
938 pci_set_master(pdev);
3176ff3e
MT		 939
940 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
941 if(!netdev) {
942 printk(KERN_ERR"%s: Failed to allocate memory for the "
943 "device block.Check system memory resource"
944 " usage.\n", netxen_nic_driver_name);
945 goto err_out_free_res;
946 }
947
3176ff3e
MT		 948 SET_NETDEV_DEV(netdev, &pdev->dev);
949
4cf1653a 950 adapter = netdev_priv(netdev);
2956640d
DP		 951 adapter->netdev = netdev;
952 adapter->pdev = pdev;
13ba9c77 953 adapter->ahw.pci_func = pci_func_id;
2956640d
DP		 954
955 revision_id = pdev->revision;
956 adapter->ahw.revision_id = revision_id;
957
958 err = nx_set_dma_mask(adapter, revision_id);
959 if (err)
960 goto err_out_free_netdev;
961
3ce06a32 962 rwlock_init(&adapter->adapter_lock);
d8b100c5 963 spin_lock_init(&adapter->tx_clean_lock);
3ce06a32 964
97daee83
DP		 965 err = netxen_setup_pci_map(adapter);
966 if (err)
6c80b18d 967 goto err_out_free_netdev;
3d396eb1 968
2d1a3bbd 969 /* This will be reset for mezz cards */
3176ff3e 970 adapter->portnum = pci_func_id;
200eef20 971 adapter->rx_csum = 1;
623621b0 972 adapter->mc_enabled = 0;
83821a07 973 if (NX_IS_REVISION_P3(revision_id))
2956640d 974 adapter->max_mc_count = 38;
83821a07 975 else
2956640d 976 adapter->max_mc_count = 16;
3176ff3e 977
1abd266f 978 netdev->netdev_ops = &netxen_netdev_ops;
05aaa02d 979 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 980
981 netxen_nic_change_mtu(netdev, netdev->mtu);
982
983 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
1abd266f 984
cdff1036 985 netdev->features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
a92e9e65 986 netdev->features |= (NETIF_F_GRO);
cdff1036
DP		 987 netdev->vlan_features |= (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO);
988
cd1f8160 989 if (NX_IS_REVISION_P3(revision_id)) {
cdff1036
DP		 990 netdev->features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
991 netdev->vlan_features |= (NETIF_F_IPV6_CSUM | NETIF_F_TSO6);
cd1f8160 992 }
3176ff3e 993
cdff1036 994 if (adapter->pci_using_dac) {
3176ff3e 995 netdev->features |= NETIF_F_HIGHDMA;
cdff1036
DP		 996 netdev->vlan_features |= NETIF_F_HIGHDMA;
997 }
3176ff3e 998
dcd56fdb
DP		 999 if (netxen_nic_get_board_info(adapter) != 0) {
1000 printk("%s: Error getting board config info.\n",
2956640d 1001 netxen_nic_driver_name);
dcd56fdb
DP		 1002 err = -EIO;
1003 goto err_out_iounmap;
1004 }
6c80b18d 1005
6c80b18d
MT		 1006 netxen_initialize_adapter_ops(adapter);
1007
13ba9c77 1008 /* Mezz cards have PCI function 0,2,3 enabled */
1e2d0059 1009 switch (adapter->ahw.board_type) {
dc515f2e
DP		 1010 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
1011 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
1012 if (pci_func_id >= 2)
13ba9c77 1013 adapter->portnum = pci_func_id - 2;
dc515f2e
DP		 1014 break;
1015 default:
1016 break;
1017 }
13ba9c77 1018
f7185c71 1019 err = netxen_start_firmware(adapter, 1);
0b72e659
DP		 1020 if (err)
1021 goto err_out_iounmap;
2956640d 1022
1f434f63
DP		 1023 nx_update_dma_mask(adapter);
1024
1e2d0059 1025 netxen_nic_get_firmware_info(adapter);
d9e651bc 1026
3d396eb1 1027 /*
6c80b18d 1028 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 1029 */
dcd56fdb 1030 adapter->physical_port = adapter->portnum;
044fad0d 1031 if (adapter->fw_major < 4) {
f98a9f69 1032 i = NXRD32(adapter, CRB_V2P(adapter->portnum));
044fad0d
DP		 1033 if (i != 0x55555555)
1034 adapter->physical_port = i;
1035 }
6c80b18d 1036
438627c7 1037 netxen_check_options(adapter);
2956640d 1038
97daee83 1039 netxen_setup_intr(adapter);
2956640d 1040
d8b100c5
DP		 1041 netdev->irq = adapter->msix_entries[0].vector;
1042
71dcddbd
DP		 1043 if (netxen_napi_add(adapter, netdev))
1044 goto err_out_disable_msi;
2956640d 1045
2956640d 1046 init_timer(&adapter->watchdog_timer);
2956640d
DP		 1047 adapter->watchdog_timer.function = &netxen_watchdog;
1048 adapter->watchdog_timer.data = (unsigned long)adapter;
1049 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
1050 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
1051
9dc28efe
DP		 1052 err = netxen_read_mac_addr(adapter);
1053 if (err)
1054 dev_warn(&pdev->dev, "failed to read mac addr\n");
2956640d 1055
3176ff3e
MT		 1056 netif_carrier_off(netdev);
1057 netif_stop_queue(netdev);
1058
6c80b18d
MT		 1059 if ((err = register_netdev(netdev))) {
1060 printk(KERN_ERR "%s: register_netdev failed port #%d"
1061 " aborting\n", netxen_nic_driver_name,
1062 adapter->portnum);
1063 err = -EIO;
2956640d 1064 goto err_out_disable_msi;
6c80b18d
MT		 1065 }
1066
1067 pci_set_drvdata(pdev, adapter);
3d396eb1 1068
1e2d0059 1069 switch (adapter->ahw.port_type) {
2956640d
DP		 1070 case NETXEN_NIC_GBE:
1071 dev_info(&adapter->pdev->dev, "%s: GbE port initialized\n",
1072 adapter->netdev->name);
1073 break;
1074 case NETXEN_NIC_XGBE:
1075 dev_info(&adapter->pdev->dev, "%s: XGbE port initialized\n",
1076 adapter->netdev->name);
1077 break;
3d396eb1 1078 }
3d396eb1 1079
2956640d
DP		 1080 return 0;
1081
1082err_out_disable_msi:
97daee83 1083 netxen_teardown_intr(adapter);
6c80b18d 1084
0b72e659 1085 netxen_free_adapter_offload(adapter);
3d396eb1 1086
2956640d 1087err_out_iounmap:
97daee83 1088 netxen_cleanup_pci_map(adapter);
cb8011ad 1089
6c80b18d
MT		 1090err_out_free_netdev:
1091 free_netdev(netdev);
1092
1093err_out_free_res:
3d396eb1 1094 pci_release_regions(pdev);
6c80b18d
MT		 1095
1096err_out_disable_pdev:
2956640d 1097 pci_set_drvdata(pdev, NULL);
3d396eb1
AK		 1098 pci_disable_device(pdev);
1099 return err;
1100}
1101
1102static void __devexit netxen_nic_remove(struct pci_dev *pdev)
1103{
1104 struct netxen_adapter *adapter;
3176ff3e 1105 struct net_device *netdev;
3d396eb1 1106
6c80b18d 1107 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 1108 if (adapter == NULL)
1109 return;
1110
6c80b18d
MT		 1111 netdev = adapter->netdev;
1112
96acb6eb
DP		 1113 unregister_netdev(netdev);
1114
96acb6eb 1115 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
9f5bc7f1 1116 netxen_nic_detach(adapter);
06e9d9f9
DP		 1117
1118 if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
1119 netxen_p3_free_mac_list(adapter);
96acb6eb 1120 }
3d396eb1 1121
439b454e
DP		 1122 if (adapter->portnum == 0)
1123 netxen_free_adapter_offload(adapter);
96acb6eb 1124
97daee83 1125 netxen_teardown_intr(adapter);
71dcddbd 1126 netxen_free_sds_rings(&adapter->recv_ctx);
3052246c 1127
97daee83 1128 netxen_cleanup_pci_map(adapter);
595e3fb8 1129
f7185c71
DP		 1130 netxen_release_firmware(adapter);
1131
595e3fb8 1132 pci_release_regions(pdev);
3052246c 1133 pci_disable_device(pdev);
595e3fb8
MT		 1134 pci_set_drvdata(pdev, NULL);
1135
6c80b18d 1136 free_netdev(netdev);
3d396eb1
AK		 1137}
1138
0b72e659
DP		 1139static int
1140netxen_nic_suspend(struct pci_dev *pdev, pm_message_t state)
1141{
1142
1143 struct netxen_adapter *adapter = pci_get_drvdata(pdev);
1144 struct net_device *netdev = adapter->netdev;
1145
1146 netif_device_detach(netdev);
1147
1148 if (netif_running(netdev))
1149 netxen_nic_down(adapter, netdev);
1150
1151 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
1152 netxen_nic_detach(adapter);
1153
1154 pci_save_state(pdev);
1155
1156 if (netxen_nic_wol_supported(adapter)) {
1157 pci_enable_wake(pdev, PCI_D3cold, 1);
1158 pci_enable_wake(pdev, PCI_D3hot, 1);
1159 }
1160
1161 pci_disable_device(pdev);
1162 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1163
1164 return 0;
1165}
1166
1167static int
1168netxen_nic_resume(struct pci_dev *pdev)
1169{
1170 struct netxen_adapter *adapter = pci_get_drvdata(pdev);
1171 struct net_device *netdev = adapter->netdev;
1172 int err;
1173
1174 pci_set_power_state(pdev, PCI_D0);
1175 pci_restore_state(pdev);
1176
1177 err = pci_enable_device(pdev);
1178 if (err)
1179 return err;
1180
1181 adapter->curr_window = 255;
1182
f7185c71 1183 err = netxen_start_firmware(adapter, 0);
0b72e659
DP		 1184 if (err) {
1185 dev_err(&pdev->dev, "failed to start firmware\n");
1186 return err;
1187 }
1188
1189 if (netif_running(netdev)) {
1190 err = netxen_nic_attach(adapter);
1191 if (err)
1192 return err;
1193
1194 err = netxen_nic_up(adapter, netdev);
1195 if (err)
1196 return err;
1197
1198 netif_device_attach(netdev);
1199 }
1200
1201 return 0;
1202}
1203
3d396eb1
AK		 1204static int netxen_nic_open(struct net_device *netdev)
1205{
4cf1653a 1206 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1207 int err = 0;
3d396eb1 1208
dcd56fdb
DP		 1209 if (adapter->driver_mismatch)
1210 return -EIO;
1211
3d396eb1 1212 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
9f5bc7f1
DP		 1213 err = netxen_nic_attach(adapter);
1214 if (err)
3d396eb1 1215 return err;
ed25ffa1 1216 }
2956640d 1217
9f5bc7f1
DP		 1218 err = netxen_nic_up(adapter, netdev);
1219 if (err)
1220 goto err_out;
05aaa02d 1221
dcd56fdb 1222 netif_start_queue(netdev);
3d396eb1
AK		 1223
1224 return 0;
2956640d 1225
9f5bc7f1
DP		 1226err_out:
1227 netxen_nic_detach(adapter);
2956640d 1228 return err;
3d396eb1
AK		 1229}
1230
1231/*
1232 * netxen_nic_close - Disables a network interface entry point
1233 */
1234static int netxen_nic_close(struct net_device *netdev)
1235{
3176ff3e 1236 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1237
9f5bc7f1 1238 netxen_nic_down(adapter, netdev);
3d396eb1
AK		 1239 return 0;
1240}
1241
391587c3 1242static bool netxen_tso_check(struct net_device *netdev,
cd1f8160
DP		 1243 struct cmd_desc_type0 *desc, struct sk_buff *skb)
1244{
391587c3
DP		 1245 bool tso = false;
1246 u8 opcode = TX_ETHER_PKT;
cdff1036
DP		 1247 __be16 protocol = skb->protocol;
1248 u16 flags = 0;
1249
09640e63 1250 if (protocol == cpu_to_be16(ETH_P_8021Q)) {
cdff1036
DP		 1251 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)skb->data;
1252 protocol = vh->h_vlan_encapsulated_proto;
1253 flags = FLAGS_VLAN_TAGGED;
1254 }
cd1f8160 1255
391587c3
DP		 1256 if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
1257 skb_shinfo(skb)->gso_size > 0) {
1258
1259 desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
1260 desc->total_hdr_length =
1261 skb_transport_offset(skb) + tcp_hdrlen(skb);
1262
09640e63 1263 opcode = (protocol == cpu_to_be16(ETH_P_IPV6)) ?
391587c3
DP		 1264 TX_TCP_LSO6 : TX_TCP_LSO;
1265 tso = true;
cd1f8160
DP		 1266
1267 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
391587c3
DP		 1268 u8 l4proto;
1269
09640e63 1270 if (protocol == cpu_to_be16(ETH_P_IP)) {
391587c3
DP		 1271 l4proto = ip_hdr(skb)->protocol;
1272
1273 if (l4proto == IPPROTO_TCP)
1274 opcode = TX_TCP_PKT;
1275 else if(l4proto == IPPROTO_UDP)
1276 opcode = TX_UDP_PKT;
09640e63 1277 } else if (protocol == cpu_to_be16(ETH_P_IPV6)) {
391587c3
DP		 1278 l4proto = ipv6_hdr(skb)->nexthdr;
1279
1280 if (l4proto == IPPROTO_TCP)
1281 opcode = TX_TCPV6_PKT;
1282 else if(l4proto == IPPROTO_UDP)
1283 opcode = TX_UDPV6_PKT;
1284 }
cd1f8160
DP		 1285 }
1286 desc->tcp_hdr_offset = skb_transport_offset(skb);
1287 desc->ip_hdr_offset = skb_network_offset(skb);
cdff1036 1288 netxen_set_tx_flags_opcode(desc, flags, opcode);
391587c3 1289 return tso;
cd1f8160
DP		 1290}
1291
6f703406
DP		 1292static void
1293netxen_clean_tx_dma_mapping(struct pci_dev *pdev,
1294 struct netxen_cmd_buffer *pbuf, int last)
1295{
1296 int k;
1297 struct netxen_skb_frag *buffrag;
1298
1299 buffrag = &pbuf->frag_array[0];
1300 pci_unmap_single(pdev, buffrag->dma,
1301 buffrag->length, PCI_DMA_TODEVICE);
1302
1303 for (k = 1; k < last; k++) {
1304 buffrag = &pbuf->frag_array[k];
1305 pci_unmap_page(pdev, buffrag->dma,
1306 buffrag->length, PCI_DMA_TODEVICE);
1307 }
1308}
1309
d32cc3d2
DP		 1310static inline void
1311netxen_clear_cmddesc(u64 *desc)
1312{
1313 int i;
1314 for (i = 0; i < 8; i++)
1315 desc[i] = 0ULL;
1316}
1317
1318static int
1319netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3d396eb1 1320{
3176ff3e 1321 struct netxen_adapter *adapter = netdev_priv(netdev);
4ea528a1 1322 struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
3d396eb1 1323 unsigned int first_seg_len = skb->len - skb->data_len;
391587c3 1324 struct netxen_cmd_buffer *pbuf;
3d396eb1 1325 struct netxen_skb_frag *buffrag;
391587c3 1326 struct cmd_desc_type0 *hwdesc;
6f703406
DP		 1327 struct pci_dev *pdev = adapter->pdev;
1328 dma_addr_t temp_dma;
391587c3 1329 int i, k;
3d396eb1 1330
ba53e6b4 1331 u32 producer, consumer;
391587c3 1332 int frag_count, no_of_desc;
d877f1e3 1333 u32 num_txd = tx_ring->num_desc;
391587c3 1334 bool is_tso = false;
3d396eb1 1335
3d396eb1
AK		 1336 frag_count = skb_shinfo(skb)->nr_frags + 1;
1337
d877f1e3 1338 /* 4 fragments per cmd des */
3d396eb1 1339 no_of_desc = (frag_count + 3) >> 2;
53a01e00 1340
d877f1e3 1341 producer = tx_ring->producer;
ba53e6b4 1342 smp_mb();
d877f1e3 1343 consumer = tx_ring->sw_consumer;
22527864 1344 if ((no_of_desc+2) >= find_diff_among(producer, consumer, num_txd)) {
ba53e6b4
DP		 1345 netif_stop_queue(netdev);
1346 smp_mb();
1347 return NETDEV_TX_BUSY;
53a01e00 1348 }
3d396eb1 1349
d877f1e3 1350 hwdesc = &tx_ring->desc_head[producer];
d32cc3d2 1351 netxen_clear_cmddesc((u64 *)hwdesc);
d877f1e3 1352 pbuf = &tx_ring->cmd_buf_arr[producer];
391587c3
DP		 1353
1354 is_tso = netxen_tso_check(netdev, hwdesc, skb);
1355
3d396eb1 1356 pbuf->skb = skb;
3d396eb1 1357 pbuf->frag_count = frag_count;
3d396eb1 1358 buffrag = &pbuf->frag_array[0];
6f703406 1359 temp_dma = pci_map_single(pdev, skb->data, first_seg_len,
3d396eb1 1360 PCI_DMA_TODEVICE);
6f703406
DP		 1361 if (pci_dma_mapping_error(pdev, temp_dma))
1362 goto drop_packet;
1363
1364 buffrag->dma = temp_dma;
3d396eb1 1365 buffrag->length = first_seg_len;
391587c3
DP		 1366 netxen_set_tx_frags_len(hwdesc, frag_count, skb->len);
1367 netxen_set_tx_port(hwdesc, adapter->portnum);
3d396eb1 1368
d32cc3d2 1369 hwdesc->buffer_length[0] = cpu_to_le16(first_seg_len);
3d396eb1
AK		 1370 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
1371
1372 for (i = 1, k = 1; i < frag_count; i++, k++) {
1373 struct skb_frag_struct *frag;
1374 int len, temp_len;
1375 unsigned long offset;
3d396eb1
AK		 1376
1377 /* move to next desc. if there is a need */
1378 if ((i & 0x3) == 0) {
1379 k = 0;
ba53e6b4 1380 producer = get_next_index(producer, num_txd);
d877f1e3 1381 hwdesc = &tx_ring->desc_head[producer];
d32cc3d2 1382 netxen_clear_cmddesc((u64 *)hwdesc);
d877f1e3 1383 pbuf = &tx_ring->cmd_buf_arr[producer];
53a01e00 1384 pbuf->skb = NULL;
3d396eb1
AK		 1385 }
1386 frag = &skb_shinfo(skb)->frags[i - 1];
1387 len = frag->size;
1388 offset = frag->page_offset;
1389
1390 temp_len = len;
6f703406 1391 temp_dma = pci_map_page(pdev, frag->page, offset,
3d396eb1 1392 len, PCI_DMA_TODEVICE);
6f703406
DP		 1393 if (pci_dma_mapping_error(pdev, temp_dma)) {
1394 netxen_clean_tx_dma_mapping(pdev, pbuf, i);
1395 goto drop_packet;
1396 }
3d396eb1
AK		 1397
1398 buffrag++;
1399 buffrag->dma = temp_dma;
1400 buffrag->length = temp_len;
1401
d32cc3d2 1402 hwdesc->buffer_length[k] = cpu_to_le16(temp_len);
3d396eb1
AK		 1403 switch (k) {
1404 case 0:
3d396eb1
AK		 1405 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
1406 break;
1407 case 1:
3d396eb1
AK		 1408 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
1409 break;
1410 case 2:
3d396eb1
AK		 1411 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1412 break;
1413 case 3:
3d396eb1
AK		 1414 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1415 break;
1416 }
1417 frag++;
1418 }
ba53e6b4 1419 producer = get_next_index(producer, num_txd);
3d396eb1 1420
3d396eb1
AK		 1421 /* For LSO, we need to copy the MAC/IP/TCP headers into
1422 * the descriptor ring
1423 */
391587c3 1424 if (is_tso) {
3d396eb1 1425 int hdr_len, first_hdr_len, more_hdr;
391587c3 1426 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
ed25ffa1
AK		 1427 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1428 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1429 more_hdr = 1;
1430 } else {
1431 first_hdr_len = hdr_len;
1432 more_hdr = 0;
1433 }
1434 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
d877f1e3
DP		 1435 hwdesc = &tx_ring->desc_head[producer];
1436 pbuf = &tx_ring->cmd_buf_arr[producer];
53a01e00 1437 pbuf->skb = NULL;
3d396eb1
AK		 1438
1439 /* copy the first 64 bytes */
ed25ffa1 1440 memcpy(((void *)hwdesc) + 2,
3d396eb1 1441 (void *)(skb->data), first_hdr_len);
ba53e6b4 1442 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1443
1444 if (more_hdr) {
d877f1e3
DP		 1445 hwdesc = &tx_ring->desc_head[producer];
1446 pbuf = &tx_ring->cmd_buf_arr[producer];
53a01e00 1447 pbuf->skb = NULL;
3d396eb1
AK		 1448 /* copy the next 64 bytes - should be enough except
1449 * for pathological case
1450 */
d626f62b
ACM		 1451 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1452 hwdesc,
1453 (hdr_len -
1454 first_hdr_len));
ba53e6b4 1455 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1456 }
1457 }
6c80b18d 1458
d877f1e3 1459 tx_ring->producer = producer;
5dc16268 1460 adapter->stats.txbytes += skb->len;
6c80b18d 1461
d877f1e3 1462 netxen_nic_update_cmd_producer(adapter, tx_ring, producer);
3d396eb1 1463
ba53e6b4 1464 adapter->stats.xmitcalled++;
3d396eb1
AK		 1465 netdev->trans_start = jiffies;
1466
3d396eb1 1467 return NETDEV_TX_OK;
6f703406
DP		 1468
1469drop_packet:
1470 adapter->stats.txdropped++;
1471 dev_kfree_skb_any(skb);
1472 return NETDEV_TX_OK;
3d396eb1
AK		 1473}
1474
a97342f9
DP		 1475static int netxen_nic_check_temp(struct netxen_adapter *adapter)
1476{
1477 struct net_device *netdev = adapter->netdev;
1478 uint32_t temp, temp_state, temp_val;
1479 int rv = 0;
1480
f98a9f69 1481 temp = NXRD32(adapter, CRB_TEMP_STATE);
a97342f9
DP		 1482
1483 temp_state = nx_get_temp_state(temp);
1484 temp_val = nx_get_temp_val(temp);
1485
1486 if (temp_state == NX_TEMP_PANIC) {
1487 printk(KERN_ALERT
1488 "%s: Device temperature %d degrees C exceeds"
1489 " maximum allowed. Hardware has been shut down.\n",
1490 netxen_nic_driver_name, temp_val);
1491
1492 netif_carrier_off(netdev);
1493 netif_stop_queue(netdev);
1494 rv = 1;
1495 } else if (temp_state == NX_TEMP_WARN) {
1496 if (adapter->temp == NX_TEMP_NORMAL) {
1497 printk(KERN_ALERT
1498 "%s: Device temperature %d degrees C "
1499 "exceeds operating range."
1500 " Immediate action needed.\n",
1501 netxen_nic_driver_name, temp_val);
1502 }
1503 } else {
1504 if (adapter->temp == NX_TEMP_WARN) {
1505 printk(KERN_INFO
1506 "%s: Device temperature is now %d degrees C"
1507 " in normal range.\n", netxen_nic_driver_name,
1508 temp_val);
1509 }
1510 }
1511 adapter->temp = temp_state;
1512 return rv;
1513}
1514
3bf26ce3 1515void netxen_advert_link_change(struct netxen_adapter *adapter, int linkup)
a97342f9
DP		 1516{
1517 struct net_device *netdev = adapter->netdev;
a97342f9
DP		 1518
1519 if (adapter->ahw.linkup && !linkup) {
1520 printk(KERN_INFO "%s: %s NIC Link is down\n",
1521 netxen_nic_driver_name, netdev->name);
1522 adapter->ahw.linkup = 0;
1523 if (netif_running(netdev)) {
1524 netif_carrier_off(netdev);
1525 netif_stop_queue(netdev);
1526 }
c7860a2a 1527
3bf26ce3
DP		 1528 if (!adapter->has_link_events)
1529 netxen_nic_set_link_parameters(adapter);
1530
a97342f9
DP		 1531 } else if (!adapter->ahw.linkup && linkup) {
1532 printk(KERN_INFO "%s: %s NIC Link is up\n",
1533 netxen_nic_driver_name, netdev->name);
1534 adapter->ahw.linkup = 1;
1535 if (netif_running(netdev)) {
1536 netif_carrier_on(netdev);
1537 netif_wake_queue(netdev);
1538 }
c7860a2a 1539
3bf26ce3
DP		 1540 if (!adapter->has_link_events)
1541 netxen_nic_set_link_parameters(adapter);
a97342f9
DP		 1542 }
1543}
1544
3bf26ce3
DP		 1545static void netxen_nic_handle_phy_intr(struct netxen_adapter *adapter)
1546{
1547 u32 val, port, linkup;
1548
1549 port = adapter->physical_port;
1550
1551 if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
f98a9f69 1552 val = NXRD32(adapter, CRB_XG_STATE_P3);
3bf26ce3
DP		 1553 val = XG_LINK_STATE_P3(adapter->ahw.pci_func, val);
1554 linkup = (val == XG_LINK_UP_P3);
1555 } else {
f98a9f69 1556 val = NXRD32(adapter, CRB_XG_STATE);
3bf26ce3
DP		 1557 if (adapter->ahw.port_type == NETXEN_NIC_GBE)
1558 linkup = (val >> port) & 1;
1559 else {
1560 val = (val >> port*8) & 0xff;
1561 linkup = (val == XG_LINK_UP);
1562 }
1563 }
1564
1565 netxen_advert_link_change(adapter, linkup);
1566}
1567
3d396eb1
AK		 1568static void netxen_watchdog(unsigned long v)
1569{
1570 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1571
1572 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1573}
1574
a97342f9
DP		 1575void netxen_watchdog_task(struct work_struct *work)
1576{
1577 struct netxen_adapter *adapter =
1578 container_of(work, struct netxen_adapter, watchdog_task);
1579
1580 if ((adapter->portnum == 0) && netxen_nic_check_temp(adapter))
1581 return;
1582
3bf26ce3
DP		 1583 if (!adapter->has_link_events)
1584 netxen_nic_handle_phy_intr(adapter);
a97342f9 1585
922c4f2c
DP		 1586 if (netif_running(adapter->netdev))
1587 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
a97342f9
DP		 1588}
1589
3d396eb1
AK		 1590static void netxen_tx_timeout(struct net_device *netdev)
1591{
3176ff3e
MT		 1592 struct netxen_adapter *adapter = (struct netxen_adapter *)
1593 netdev_priv(netdev);
1594 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1595}
1596
6d5aefb8 1597static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1598{
4790654c 1599 struct netxen_adapter *adapter =
3176ff3e 1600 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1601
1602 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1603 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1604
d8b100c5 1605 netxen_napi_disable(adapter);
ba53e6b4 1606
6c80b18d 1607 adapter->netdev->trans_start = jiffies;
ba53e6b4 1608
d8b100c5 1609 netxen_napi_enable(adapter);
6c80b18d 1610 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1611}
1612
a97342f9
DP		 1613struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
1614{
1615 struct netxen_adapter *adapter = netdev_priv(netdev);
1616 struct net_device_stats *stats = &adapter->net_stats;
1617
1618 memset(stats, 0, sizeof(*stats));
1619
a97342f9 1620 stats->rx_packets = adapter->stats.no_rcv;
e98e3350 1621 stats->tx_packets = adapter->stats.xmitfinished;
a97342f9 1622 stats->rx_bytes = adapter->stats.rxbytes;
a97342f9 1623 stats->tx_bytes = adapter->stats.txbytes;
a97342f9 1624 stats->rx_dropped = adapter->stats.rxdropped;
a97342f9
DP		 1625 stats->tx_dropped = adapter->stats.txdropped;
1626
1627 return stats;
1628}
1629
e4c93c81 1630static irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1631{
d8b100c5
DP		 1632 struct nx_host_sds_ring *sds_ring = data;
1633 struct netxen_adapter *adapter = sds_ring->adapter;
d71e1be8
DP		 1634 u32 status = 0;
1635
1636 status = adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1637
1638 if (!(status & adapter->legacy_intr.int_vec_bit))
05aaa02d 1639 return IRQ_NONE;
e01872af 1640
d71e1be8
DP		 1641 if (adapter->ahw.revision_id >= NX_P3_B1) {
1642 /* check interrupt state machine, to be sure */
1643 status = adapter->pci_read_immediate(adapter,
1644 ISR_INT_STATE_REG);
1645 if (!ISR_LEGACY_INT_TRIGGERED(status))
1646 return IRQ_NONE;
1647
092bc571
DP		 1648 } else {
1649 unsigned long our_int = 0;
d71e1be8 1650
f98a9f69 1651 our_int = NXRD32(adapter, CRB_INT_VECTOR);
092bc571 1652
d71e1be8 1653 /* not our interrupt */
092bc571 1654 if (!test_and_clear_bit((7 + adapter->portnum), &our_int))
d71e1be8
DP		 1655 return IRQ_NONE;
1656
092bc571 1657 /* claim interrupt */
f98a9f69 1658 NXWR32(adapter, CRB_INT_VECTOR, (our_int & 0xffffffff));
e01872af 1659 }
1660
092bc571
DP		 1661 /* clear interrupt */
1662 if (adapter->fw_major < 4)
d8b100c5 1663 netxen_nic_disable_int(sds_ring);
092bc571
DP		 1664
1665 adapter->pci_write_immediate(adapter,
1666 adapter->legacy_intr.tgt_status_reg,
1667 0xffffffff);
1668 /* read twice to ensure write is flushed */
1669 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1670 adapter->pci_read_immediate(adapter, ISR_INT_VECTOR);
1671
d8b100c5 1672 napi_schedule(&sds_ring->napi);
3d396eb1
AK		 1673
1674 return IRQ_HANDLED;
1675}
1676
e4c93c81 1677static irqreturn_t netxen_msi_intr(int irq, void *data)
05aaa02d 1678{
d8b100c5
DP		 1679 struct nx_host_sds_ring *sds_ring = data;
1680 struct netxen_adapter *adapter = sds_ring->adapter;
05aaa02d 1681
092bc571
DP		 1682 /* clear interrupt */
1683 adapter->pci_write_immediate(adapter,
1684 msi_tgt_status[adapter->ahw.pci_func], 0xffffffff);
1685
d8b100c5 1686 napi_schedule(&sds_ring->napi);
05aaa02d
DP		 1687 return IRQ_HANDLED;
1688}
1689
b3df68f8
DP		 1690static irqreturn_t netxen_msix_intr(int irq, void *data)
1691{
d8b100c5 1692 struct nx_host_sds_ring *sds_ring = data;
b3df68f8 1693
d8b100c5 1694 napi_schedule(&sds_ring->napi);
b3df68f8
DP		 1695 return IRQ_HANDLED;
1696}
1697
bea3348e 1698static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1699{
d8b100c5
DP		 1700 struct nx_host_sds_ring *sds_ring =
1701 container_of(napi, struct nx_host_sds_ring, napi);
1702
1703 struct netxen_adapter *adapter = sds_ring->adapter;
1704
05aaa02d 1705 int tx_complete;
bea3348e 1706 int work_done;
3d396eb1 1707
05aaa02d 1708 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1709
d8b100c5 1710 work_done = netxen_process_rcv_ring(sds_ring, budget);
3d396eb1 1711
05aaa02d 1712 if ((work_done < budget) && tx_complete) {
d8b100c5
DP		 1713 napi_complete(&sds_ring->napi);
1714 netxen_nic_enable_int(sds_ring);
3d396eb1
AK		 1715 }
1716
bea3348e 1717 return work_done;
3d396eb1
AK		 1718}
1719
1720#ifdef CONFIG_NET_POLL_CONTROLLER
1721static void netxen_nic_poll_controller(struct net_device *netdev)
1722{
3176ff3e 1723 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1724 disable_irq(adapter->irq);
1494a814 1725 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1726 enable_irq(adapter->irq);
1727}
1728#endif
3d396eb1
AK		 1729
1730static struct pci_driver netxen_driver = {
1731 .name = netxen_nic_driver_name,
1732 .id_table = netxen_pci_tbl,
1733 .probe = netxen_nic_probe,
0b72e659
DP		 1734 .remove = __devexit_p(netxen_nic_remove),
1735 .suspend = netxen_nic_suspend,
1736 .resume = netxen_nic_resume
3d396eb1
AK		 1737};
1738
1739/* Driver Registration on NetXen card */
1740
1741static int __init netxen_init_module(void)
1742{
ff4fbd43
DP		 1743 printk(KERN_INFO "%s\n", netxen_nic_driver_string);
1744
79ea13ce 1745 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1746 return -ENOMEM;
1747
184231bd 1748 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1749}
1750
1751module_init(netxen_init_module);
1752
1753static void __exit netxen_exit_module(void)
1754{
3d396eb1 1755 pci_unregister_driver(&netxen_driver);
9de06610 1756 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1757}
1758
1759module_exit(netxen_exit_module);
Linux 6.x block layer and io_uring tree(s)