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netxen: add defs for new chip/boards
[linux-2.6-block.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>
c9bdd4b5 42#include <net/ip.h>
1494a814 43
3d396eb1
AK		 44MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
45MODULE_LICENSE("GPL");
46MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
47
ceded32f 48char netxen_nic_driver_name[] = "netxen_nic";
3d396eb1 49static char netxen_nic_driver_string[] = "NetXen Network Driver version "
cb8011ad 50 NETXEN_NIC_LINUX_VERSIONID;
3d396eb1
AK		 51
52#define NETXEN_NETDEV_WEIGHT 120
53#define NETXEN_ADAPTER_UP_MAGIC 777
cb8011ad 54#define NETXEN_NIC_PEG_TUNE 0
3d396eb1
AK		 55
56/* Local functions to NetXen NIC driver */
57static int __devinit netxen_nic_probe(struct pci_dev *pdev,
58 const struct pci_device_id *ent);
59static void __devexit netxen_nic_remove(struct pci_dev *pdev);
60static int netxen_nic_open(struct net_device *netdev);
61static int netxen_nic_close(struct net_device *netdev);
62static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
63static void netxen_tx_timeout(struct net_device *netdev);
6d5aefb8 64static void netxen_tx_timeout_task(struct work_struct *work);
3d396eb1 65static void netxen_watchdog(unsigned long);
bea3348e 66static int netxen_nic_poll(struct napi_struct *napi, int budget);
3d396eb1
AK		 67#ifdef CONFIG_NET_POLL_CONTROLLER
68static void netxen_nic_poll_controller(struct net_device *netdev);
69#endif
1494a814 70static irqreturn_t netxen_intr(int irq, void *data);
05aaa02d 71static irqreturn_t netxen_msi_intr(int irq, void *data);
3d396eb1
AK		 72
73/* PCI Device ID Table */
70081ac5
AV		 74#define ENTRY(device) \
75 {PCI_DEVICE(0x4040, (device)), \
76 .class = PCI_CLASS_NETWORK_ETHERNET << 8, .class_mask = ~0}
77
3d396eb1 78static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
70081ac5
AV		 79 ENTRY(0x0001),
80 ENTRY(0x0002),
81 ENTRY(0x0003),
82 ENTRY(0x0004),
83 ENTRY(0x0005),
84 ENTRY(0x0024),
85 ENTRY(0x0025),
e4c93c81 86 ENTRY(0x0100),
3d396eb1
AK		 87 {0,}
88};
89
90MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
91
b1555130
AB		 92/*
93 * In netxen_nic_down(), we must wait for any pending callback requests into
94 * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
95 * reenabled right after it is deleted in netxen_nic_down().
96 * FLUSH_SCHEDULED_WORK() does this synchronization.
97 *
98 * Normally, schedule_work()/flush_scheduled_work() could have worked, but
99 * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
100 * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
101 * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
102 * linkwatch_event() to be executed which also attempts to acquire the rtnl
103 * lock thus causing a deadlock.
104 */
105
106static struct workqueue_struct *netxen_workq;
107#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
108#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
109
ed25ffa1
AK		 110static void netxen_watchdog(unsigned long);
111
7830b22c
DP		 112static uint32_t crb_cmd_producer[4] = {
113 CRB_CMD_PRODUCER_OFFSET, CRB_CMD_PRODUCER_OFFSET_1,
114 CRB_CMD_PRODUCER_OFFSET_2, CRB_CMD_PRODUCER_OFFSET_3
115};
116
993fb90c
AB		 117static void netxen_nic_update_cmd_producer(struct netxen_adapter *adapter,
118 uint32_t crb_producer)
3176ff3e 119{
7830b22c
DP		 120 writel(crb_producer, NETXEN_CRB_NORMALIZE(adapter,
121 adapter->crb_addr_cmd_producer));
3176ff3e
MT		 122}
123
7830b22c
DP		 124static uint32_t crb_cmd_consumer[4] = {
125 CRB_CMD_CONSUMER_OFFSET, CRB_CMD_CONSUMER_OFFSET_1,
126 CRB_CMD_CONSUMER_OFFSET_2, CRB_CMD_CONSUMER_OFFSET_3
127};
128
993fb90c
AB		 129static void netxen_nic_update_cmd_consumer(struct netxen_adapter *adapter,
130 u32 crb_consumer)
3176ff3e 131{
7830b22c
DP		 132 writel(crb_consumer, NETXEN_CRB_NORMALIZE(adapter,
133 adapter->crb_addr_cmd_consumer));
3176ff3e
MT		 134}
135
443be796
DP		 136static uint32_t msi_tgt_status[4] = {
137 ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
138 ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
139};
140
141static uint32_t sw_int_mask[4] = {
142 CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
143 CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
144};
145
4638aef1
SH		 146static void netxen_nic_disable_int(struct netxen_adapter *adapter)
147{
443be796 148 u32 mask = 0x7ff;
4638aef1 149 int retries = 32;
443be796
DP		 150 int port = adapter->portnum;
151 int pci_fn = adapter->ahw.pci_func;
4638aef1 152
f0c88f9c 153 if (adapter->msi_mode != MSI_MODE_MULTIFUNC)
443be796 154 writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 155
156 if (adapter->intr_scheme != -1 &&
157 adapter->intr_scheme != INTR_SCHEME_PERPORT)
158 writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
159
4638aef1
SH		 160 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
161 do {
162 writel(0xffffffff,
163 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_STATUS));
164 mask = readl(pci_base_offset(adapter, ISR_INT_VECTOR));
165 if (!(mask & 0x80))
166 break;
167 udelay(10);
168 } while (--retries);
169
170 if (!retries) {
171 printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
172 netxen_nic_driver_name);
173 }
443be796
DP		 174 } else {
175 if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
176 writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
177 msi_tgt_status[pci_fn]));
178 }
4638aef1 179 }
4638aef1
SH		 180}
181
182static void netxen_nic_enable_int(struct netxen_adapter *adapter)
183{
184 u32 mask;
443be796 185 int port = adapter->portnum;
4638aef1
SH		 186
187 DPRINTK(1, INFO, "Entered ISR Enable \n");
188
189 if (adapter->intr_scheme != -1 &&
190 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
191 switch (adapter->ahw.board_type) {
192 case NETXEN_NIC_GBE:
193 mask = 0x77b;
194 break;
195 case NETXEN_NIC_XGBE:
196 mask = 0x77f;
197 break;
198 default:
199 mask = 0x7ff;
200 break;
201 }
202
203 writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
204 }
205
443be796 206 writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
4638aef1
SH		 207
208 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
209 mask = 0xbff;
210 if (adapter->intr_scheme != -1 &&
211 adapter->intr_scheme != INTR_SCHEME_PERPORT) {
212 writel(0X0, NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
213 }
214 writel(mask,
215 PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_TARGET_MASK));
216 }
217
218 DPRINTK(1, INFO, "Done with enable Int\n");
219}
220
3d396eb1
AK		 221/*
222 * netxen_nic_probe()
223 *
224 * The Linux system will invoke this after identifying the vendor ID and
225 * device Id in the pci_tbl supported by this module.
226 *
227 * A quad port card has one operational PCI config space, (function 0),
228 * which is used to access all four ports.
229 *
230 * This routine will initialize the adapter, and setup the global parameters
231 * along with the port's specific structure.
232 */
233static int __devinit
234netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
235{
236 struct net_device *netdev = NULL;
237 struct netxen_adapter *adapter = NULL;
ed25ffa1
AK		 238 void __iomem *mem_ptr0 = NULL;
239 void __iomem *mem_ptr1 = NULL;
240 void __iomem *mem_ptr2 = NULL;
6c80b18d
MT		 241 unsigned long first_page_group_end;
242 unsigned long first_page_group_start;
243
cb8011ad 244
a608ab9c 245 u8 __iomem *db_ptr = NULL;
ed25ffa1 246 unsigned long mem_base, mem_len, db_base, db_len;
3176ff3e 247 int pci_using_dac, i = 0, err;
3d396eb1
AK		 248 int ring;
249 struct netxen_recv_context *recv_ctx = NULL;
250 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
251 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
f305f789 252 __le64 mac_addr[FLASH_NUM_PORTS + 1];
6c80b18d
MT		 253 int valid_mac = 0;
254 u32 val;
3176ff3e 255 int pci_func_id = PCI_FUNC(pdev->devfn);
0795af57 256 DECLARE_MAC_BUF(mac);
3d396eb1 257
dcd56fdb
DP		 258 if (pci_func_id == 0)
259 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
6c80b18d 260
3176ff3e 261 if (pdev->class != 0x020000) {
dcd56fdb 262 printk(KERN_DEBUG "NetXen function %d, class %x will not "
3176ff3e 263 "be enabled.\n",pci_func_id, pdev->class);
ed25ffa1
AK		 264 return -ENODEV;
265 }
3d396eb1
AK		 266 if ((err = pci_enable_device(pdev)))
267 return err;
268 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
269 err = -ENODEV;
270 goto err_out_disable_pdev;
271 }
272
273 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
274 goto err_out_disable_pdev;
275
276 pci_set_master(pdev);
44c10138 277 if (pdev->revision == NX_P2_C1 &&
ed25ffa1
AK		 278 (pci_set_dma_mask(pdev, DMA_35BIT_MASK) == 0) &&
279 (pci_set_consistent_dma_mask(pdev, DMA_35BIT_MASK) == 0)) {
3d396eb1 280 pci_using_dac = 1;
ed25ffa1 281 } else {
3d396eb1
AK		 282 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
283 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
284 goto err_out_free_res;
285
286 pci_using_dac = 0;
287 }
288
3176ff3e
MT		 289
290 netdev = alloc_etherdev(sizeof(struct netxen_adapter));
291 if(!netdev) {
292 printk(KERN_ERR"%s: Failed to allocate memory for the "
293 "device block.Check system memory resource"
294 " usage.\n", netxen_nic_driver_name);
295 goto err_out_free_res;
296 }
297
3176ff3e
MT		 298 SET_NETDEV_DEV(netdev, &pdev->dev);
299
300 adapter = netdev->priv;
3176ff3e 301
13ba9c77
MT		 302 adapter->ahw.pci_func = pci_func_id;
303
3d396eb1
AK		 304 /* remap phys address */
305 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
306 mem_len = pci_resource_len(pdev, 0);
307
308 /* 128 Meg of memory */
6c80b18d
MT		 309 if (mem_len == NETXEN_PCI_128MB_SIZE) {
310 mem_ptr0 = ioremap(mem_base, FIRST_PAGE_GROUP_SIZE);
311 mem_ptr1 = ioremap(mem_base + SECOND_PAGE_GROUP_START,
312 SECOND_PAGE_GROUP_SIZE);
313 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START,
314 THIRD_PAGE_GROUP_SIZE);
315 first_page_group_start = FIRST_PAGE_GROUP_START;
316 first_page_group_end = FIRST_PAGE_GROUP_END;
317 } else if (mem_len == NETXEN_PCI_32MB_SIZE) {
318 mem_ptr1 = ioremap(mem_base, SECOND_PAGE_GROUP_SIZE);
319 mem_ptr2 = ioremap(mem_base + THIRD_PAGE_GROUP_START -
320 SECOND_PAGE_GROUP_START, THIRD_PAGE_GROUP_SIZE);
321 first_page_group_start = 0;
322 first_page_group_end = 0;
323 } else {
4790654c 324 err = -EIO;
6c80b18d
MT		 325 goto err_out_free_netdev;
326 }
cb8011ad 327
79ea13ce
AV		 328 if ((!mem_ptr0 && mem_len == NETXEN_PCI_128MB_SIZE) ||
329 !mem_ptr1 || !mem_ptr2) {
ed25ffa1 330 DPRINTK(ERR,
cb8011ad
AK		 331 "Cannot remap adapter memory aborting.:"
332 "0 -> %p, 1 -> %p, 2 -> %p\n",
333 mem_ptr0, mem_ptr1, mem_ptr2);
334
3d396eb1 335 err = -EIO;
ed25ffa1
AK		 336 goto err_out_iounmap;
337 }
338 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
339 db_len = pci_resource_len(pdev, 4);
340
341 if (db_len == 0) {
342 printk(KERN_ERR "%s: doorbell is disabled\n",
343 netxen_nic_driver_name);
344 err = -EIO;
345 goto err_out_iounmap;
346 }
347 DPRINTK(INFO, "doorbell ioremap from %lx a size of %lx\n", db_base,
348 db_len);
349
350 db_ptr = ioremap(db_base, NETXEN_DB_MAPSIZE_BYTES);
a608ab9c 351 if (!db_ptr) {
ed25ffa1
AK		 352 printk(KERN_ERR "%s: Failed to allocate doorbell map.",
353 netxen_nic_driver_name);
354 err = -EIO;
355 goto err_out_iounmap;
3d396eb1 356 }
ed25ffa1 357 DPRINTK(INFO, "doorbell ioremaped at %p\n", db_ptr);
3d396eb1 358
6c80b18d
MT		 359 adapter->ahw.pci_base0 = mem_ptr0;
360 adapter->ahw.first_page_group_start = first_page_group_start;
361 adapter->ahw.first_page_group_end = first_page_group_end;
362 adapter->ahw.pci_base1 = mem_ptr1;
363 adapter->ahw.pci_base2 = mem_ptr2;
364 adapter->ahw.db_base = db_ptr;
365 adapter->ahw.db_len = db_len;
3d396eb1 366
3176ff3e
MT		 367 adapter->netdev = netdev;
368 adapter->pdev = pdev;
2d1a3bbd 369
bea3348e
SH		 370 netif_napi_add(netdev, &adapter->napi,
371 netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
372
2d1a3bbd 373 /* this will be read from FW later */
374 adapter->intr_scheme = -1;
443be796 375 adapter->msi_mode = -1;
2d1a3bbd 376
377 /* This will be reset for mezz cards */
3176ff3e 378 adapter->portnum = pci_func_id;
2d1a3bbd 379 adapter->status &= ~NETXEN_NETDEV_STATUS;
200eef20 380 adapter->rx_csum = 1;
623621b0
DP		 381 adapter->max_mc_count = 16;
382 adapter->mc_enabled = 0;
3176ff3e
MT		 383
384 netdev->open = netxen_nic_open;
385 netdev->stop = netxen_nic_close;
386 netdev->hard_start_xmit = netxen_nic_xmit_frame;
4790654c 387 netdev->get_stats = netxen_nic_get_stats;
3176ff3e
MT		 388 netdev->set_multicast_list = netxen_nic_set_multi;
389 netdev->set_mac_address = netxen_nic_set_mac;
390 netdev->change_mtu = netxen_nic_change_mtu;
391 netdev->tx_timeout = netxen_tx_timeout;
05aaa02d 392 netdev->watchdog_timeo = 2*HZ;
3176ff3e
MT		 393
394 netxen_nic_change_mtu(netdev, netdev->mtu);
395
396 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
3176ff3e
MT		 397#ifdef CONFIG_NET_POLL_CONTROLLER
398 netdev->poll_controller = netxen_nic_poll_controller;
399#endif
400 /* ScatterGather support */
401 netdev->features = NETIF_F_SG;
402 netdev->features |= NETIF_F_IP_CSUM;
403 netdev->features |= NETIF_F_TSO;
404
405 if (pci_using_dac)
406 netdev->features |= NETIF_F_HIGHDMA;
407
644caeef 408 if (pci_enable_msi(pdev))
3176ff3e 409 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
644caeef 410 else
3176ff3e
MT		 411 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
412
6c80b18d
MT		 413 netdev->irq = pdev->irq;
414 INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
415
416 /*
417 * Set the CRB window to invalid. If any register in window 0 is
418 * accessed it should set the window to 0 and then reset it to 1.
419 */
420 adapter->curr_window = 255;
421
dcd56fdb
DP		 422 if (netxen_nic_get_board_info(adapter) != 0) {
423 printk("%s: Error getting board config info.\n",
424 netxen_nic_driver_name);
425 err = -EIO;
426 goto err_out_iounmap;
427 }
6c80b18d 428
6c80b18d
MT		 429 /*
430 * Adapter in our case is quad port so initialize it before
431 * initializing the ports
432 */
433
434 netxen_initialize_adapter_ops(adapter);
435
436 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS_HOST;
437 if ((adapter->ahw.boardcfg.board_type == NETXEN_BRDTYPE_P2_SB35_4G) ||
4790654c
JG		 438 (adapter->ahw.boardcfg.board_type ==
439 NETXEN_BRDTYPE_P2_SB31_2G))
6c80b18d
MT		 440 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS_1G;
441 else
442 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
443 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
444 adapter->max_lro_rx_desc_count = MAX_LRO_RCV_DESCRIPTORS;
445
3d396eb1
AK		 446 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
447 if (cmd_buf_arr == NULL) {
ed25ffa1
AK		 448 printk(KERN_ERR
449 "%s: Could not allocate cmd_buf_arr memory:%d\n",
450 netxen_nic_driver_name, (int)TX_RINGSIZE);
3d396eb1
AK		 451 err = -ENOMEM;
452 goto err_out_free_adapter;
453 }
454 memset(cmd_buf_arr, 0, TX_RINGSIZE);
6c80b18d 455 adapter->cmd_buf_arr = cmd_buf_arr;
3d396eb1
AK		 456
457 for (i = 0; i < MAX_RCV_CTX; ++i) {
458 recv_ctx = &adapter->recv_ctx[i];
459 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
460 rcv_desc = &recv_ctx->rcv_desc[ring];
461 switch (RCV_DESC_TYPE(ring)) {
462 case RCV_DESC_NORMAL:
463 rcv_desc->max_rx_desc_count =
464 adapter->max_rx_desc_count;
465 rcv_desc->flags = RCV_DESC_NORMAL;
466 rcv_desc->dma_size = RX_DMA_MAP_LEN;
467 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
468 break;
469
470 case RCV_DESC_JUMBO:
471 rcv_desc->max_rx_desc_count =
472 adapter->max_jumbo_rx_desc_count;
473 rcv_desc->flags = RCV_DESC_JUMBO;
474 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
475 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
476 break;
477
ed25ffa1
AK		 478 case RCV_RING_LRO:
479 rcv_desc->max_rx_desc_count =
480 adapter->max_lro_rx_desc_count;
481 rcv_desc->flags = RCV_DESC_LRO;
482 rcv_desc->dma_size = RX_LRO_DMA_MAP_LEN;
483 rcv_desc->skb_size = MAX_RX_LRO_BUFFER_LENGTH;
484 break;
485
3d396eb1
AK		 486 }
487 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
488 vmalloc(RCV_BUFFSIZE);
489
490 if (rcv_desc->rx_buf_arr == NULL) {
5bc51424 491 printk(KERN_ERR "%s: Could not allocate "
ed25ffa1
AK		 492 "rcv_desc->rx_buf_arr memory:%d\n",
493 netxen_nic_driver_name,
494 (int)RCV_BUFFSIZE);
3d396eb1
AK		 495 err = -ENOMEM;
496 goto err_out_free_rx_buffer;
497 }
498 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
499 }
500
501 }
502
ed25ffa1 503 netxen_initialize_adapter_sw(adapter); /* initialize the buffers in adapter */
6c80b18d 504
13ba9c77 505 /* Mezz cards have PCI function 0,2,3 enabled */
dc515f2e
DP		 506 switch (adapter->ahw.boardcfg.board_type) {
507 case NETXEN_BRDTYPE_P2_SB31_10G_IMEZ:
508 case NETXEN_BRDTYPE_P2_SB31_10G_HMEZ:
509 if (pci_func_id >= 2)
13ba9c77 510 adapter->portnum = pci_func_id - 2;
dc515f2e
DP		 511 break;
512 default:
513 break;
514 }
13ba9c77 515
3d396eb1
AK		 516 init_timer(&adapter->watchdog_timer);
517 adapter->ahw.xg_linkup = 0;
518 adapter->watchdog_timer.function = &netxen_watchdog;
519 adapter->watchdog_timer.data = (unsigned long)adapter;
6d5aefb8 520 INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
44c10138 521 adapter->ahw.revision_id = pdev->revision;
3d396eb1 522
6c80b18d
MT		 523 /* make sure Window == 1 */
524 netxen_nic_pci_change_crbwindow(adapter, 1);
525
7830b22c
DP		 526 adapter->crb_addr_cmd_producer = crb_cmd_producer[adapter->portnum];
527 adapter->crb_addr_cmd_consumer = crb_cmd_consumer[adapter->portnum];
3176ff3e
MT		 528 netxen_nic_update_cmd_producer(adapter, 0);
529 netxen_nic_update_cmd_consumer(adapter, 0);
3d396eb1
AK		 530
531 if (netxen_is_flash_supported(adapter) == 0 &&
532 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
533 valid_mac = 1;
534 else
535 valid_mac = 0;
536
3176ff3e 537 if (valid_mac) {
13ba9c77 538 unsigned char *p = (unsigned char *)&mac_addr[adapter->portnum];
3176ff3e
MT		 539 netdev->dev_addr[0] = *(p + 5);
540 netdev->dev_addr[1] = *(p + 4);
541 netdev->dev_addr[2] = *(p + 3);
542 netdev->dev_addr[3] = *(p + 2);
543 netdev->dev_addr[4] = *(p + 1);
544 netdev->dev_addr[5] = *(p + 0);
545
546 memcpy(netdev->perm_addr, netdev->dev_addr,
547 netdev->addr_len);
548 if (!is_valid_ether_addr(netdev->perm_addr)) {
0795af57
JP		 549 printk(KERN_ERR "%s: Bad MAC address %s.\n",
550 netxen_nic_driver_name,
551 print_mac(mac, netdev->dev_addr));
3176ff3e
MT		 552 } else {
553 if (adapter->macaddr_set)
554 adapter->macaddr_set(adapter,
555 netdev->dev_addr);
556 }
557 }
558
6c80b18d 559 if (adapter->portnum == 0) {
13ba9c77 560 err = netxen_initialize_adapter_offload(adapter);
4790654c 561 if (err)
6c80b18d 562 goto err_out_free_rx_buffer;
4790654c 563 val = readl(NETXEN_CRB_NORMALIZE(adapter,
6c80b18d
MT		 564 NETXEN_CAM_RAM(0x1fc)));
565 if (val == 0x55555555) {
566 /* This is the first boot after power up */
644caeef 567 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
96acb6eb
DP		 568 if (!(val & 0x4)) {
569 val |= 0x4;
570 netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
571 netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
572 if (!(val & 0x4))
573 printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
574 netxen_nic_driver_name);
575 }
6c80b18d
MT		 576 val = readl(NETXEN_CRB_NORMALIZE(adapter,
577 NETXEN_ROMUSB_GLB_SW_RESET));
578 printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
579 if (val != 0x80000f) {
580 /* clear the register for future unloads/loads */
644caeef 581 writel(0, NETXEN_CRB_NORMALIZE(adapter,
582 NETXEN_CAM_RAM(0x1fc)));
583 printk(KERN_ERR "ERROR in NetXen HW init sequence.\n");
584 err = -ENODEV;
585 goto err_out_free_dev;
6c80b18d 586 }
439b454e
DP		 587 } else {
588 writel(0, NETXEN_CRB_NORMALIZE(adapter,
589 CRB_CMDPEG_STATE));
590 netxen_pinit_from_rom(adapter, 0);
591 msleep(1);
592 netxen_load_firmware(adapter);
593 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
623621b0
DP		 594
595 /* Initialize multicast addr pool owners */
596 val = 0x7654;
597 if (adapter->ahw.board_type == NETXEN_NIC_XGBE)
598 val |= 0x0f000000;
599 netxen_crb_writelit_adapter(adapter,
600 NETXEN_MAC_ADDR_CNTL_REG, val);
601
6c80b18d 602 }
96acb6eb
DP		 603
604 /* clear the register for future unloads/loads */
605 writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
439b454e 606 dev_info(&pdev->dev, "cmdpeg state: 0x%0x\n",
6c80b18d
MT		 607 readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
608
609 /*
610 * Tell the hardware our version number.
611 */
4790654c 612 i = (_NETXEN_NIC_LINUX_MAJOR << 16)
6c80b18d
MT		 613 | ((_NETXEN_NIC_LINUX_MINOR << 8))
614 | (_NETXEN_NIC_LINUX_SUBVERSION);
615 writel(i, NETXEN_CRB_NORMALIZE(adapter, CRB_DRIVER_VERSION));
3d396eb1 616
3176ff3e
MT		 617 /* Unlock the HW, prompting the boot sequence */
618 writel(1,
619 NETXEN_CRB_NORMALIZE(adapter,
620 NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
621 /* Handshake with the card before we register the devices. */
622 netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
623 }
3d396eb1 624
3d396eb1 625 /*
6c80b18d 626 * See if the firmware gave us a virtual-physical port mapping.
3d396eb1 627 */
dcd56fdb 628 adapter->physical_port = adapter->portnum;
6c80b18d
MT		 629 i = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_V2P(adapter->portnum)));
630 if (i != 0x55555555)
3276fbad 631 adapter->physical_port = i;
6c80b18d 632
3176ff3e
MT		 633 netif_carrier_off(netdev);
634 netif_stop_queue(netdev);
635
6c80b18d
MT		 636 if ((err = register_netdev(netdev))) {
637 printk(KERN_ERR "%s: register_netdev failed port #%d"
638 " aborting\n", netxen_nic_driver_name,
639 adapter->portnum);
640 err = -EIO;
641 goto err_out_free_dev;
642 }
643
dcd56fdb 644 netxen_nic_flash_print(adapter);
6c80b18d 645 pci_set_drvdata(pdev, adapter);
3d396eb1 646
3d396eb1
AK		 647 return 0;
648
6c80b18d
MT		 649err_out_free_dev:
650 if (adapter->portnum == 0)
651 netxen_free_adapter_offload(adapter);
ed25ffa1 652
6c80b18d 653err_out_free_rx_buffer:
3d396eb1
AK		 654 for (i = 0; i < MAX_RCV_CTX; ++i) {
655 recv_ctx = &adapter->recv_ctx[i];
656 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
657 rcv_desc = &recv_ctx->rcv_desc[ring];
658 if (rcv_desc->rx_buf_arr != NULL) {
659 vfree(rcv_desc->rx_buf_arr);
660 rcv_desc->rx_buf_arr = NULL;
661 }
662 }
663 }
3d396eb1
AK		 664 vfree(cmd_buf_arr);
665
6c80b18d
MT		 666err_out_free_adapter:
667 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
668 pci_disable_msi(pdev);
669
3d396eb1 670 pci_set_drvdata(pdev, NULL);
3d396eb1 671
ed25ffa1
AK		 672 if (db_ptr)
673 iounmap(db_ptr);
674
6c80b18d 675err_out_iounmap:
ed25ffa1
AK		 676 if (mem_ptr0)
677 iounmap(mem_ptr0);
678 if (mem_ptr1)
679 iounmap(mem_ptr1);
680 if (mem_ptr2)
681 iounmap(mem_ptr2);
cb8011ad 682
6c80b18d
MT		 683err_out_free_netdev:
684 free_netdev(netdev);
685
686err_out_free_res:
3d396eb1 687 pci_release_regions(pdev);
6c80b18d
MT		 688
689err_out_disable_pdev:
3d396eb1
AK		 690 pci_disable_device(pdev);
691 return err;
692}
693
694static void __devexit netxen_nic_remove(struct pci_dev *pdev)
695{
696 struct netxen_adapter *adapter;
3176ff3e 697 struct net_device *netdev;
3d396eb1
AK		 698 struct netxen_rx_buffer *buffer;
699 struct netxen_recv_context *recv_ctx;
700 struct netxen_rcv_desc_ctx *rcv_desc;
96acb6eb
DP		 701 int i, ctxid, ring;
702 static int init_firmware_done = 0;
3d396eb1 703
6c80b18d 704 adapter = pci_get_drvdata(pdev);
3d396eb1
AK		 705 if (adapter == NULL)
706 return;
707
6c80b18d
MT		 708 netdev = adapter->netdev;
709
96acb6eb
DP		 710 unregister_netdev(netdev);
711
96acb6eb
DP		 712 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
713 init_firmware_done++;
3d396eb1 714 netxen_free_hw_resources(adapter);
96acb6eb 715 }
3d396eb1 716
3d396eb1
AK		 717 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
718 recv_ctx = &adapter->recv_ctx[ctxid];
719 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
720 rcv_desc = &recv_ctx->rcv_desc[ring];
721 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
722 buffer = &(rcv_desc->rx_buf_arr[i]);
723 if (buffer->state == NETXEN_BUFFER_FREE)
724 continue;
725 pci_unmap_single(pdev, buffer->dma,
726 rcv_desc->dma_size,
727 PCI_DMA_FROMDEVICE);
728 if (buffer->skb != NULL)
729 dev_kfree_skb_any(buffer->skb);
730 }
731 vfree(rcv_desc->rx_buf_arr);
732 }
733 }
734
6c80b18d
MT		 735 vfree(adapter->cmd_buf_arr);
736
439b454e
DP		 737 if (adapter->portnum == 0)
738 netxen_free_adapter_offload(adapter);
96acb6eb 739
3052246c 740 if (adapter->irq)
741 free_irq(adapter->irq, adapter);
742
743 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
744 pci_disable_msi(pdev);
745
6c80b18d
MT		 746 iounmap(adapter->ahw.db_base);
747 iounmap(adapter->ahw.pci_base0);
748 iounmap(adapter->ahw.pci_base1);
749 iounmap(adapter->ahw.pci_base2);
595e3fb8
MT		 750
751 pci_release_regions(pdev);
3052246c 752 pci_disable_device(pdev);
595e3fb8
MT		 753 pci_set_drvdata(pdev, NULL);
754
6c80b18d 755 free_netdev(netdev);
3d396eb1
AK		 756}
757
758/*
759 * Called when a network interface is made active
760 * @returns 0 on success, negative value on failure
761 */
762static int netxen_nic_open(struct net_device *netdev)
763{
3176ff3e 764 struct netxen_adapter *adapter = (struct netxen_adapter *)netdev->priv;
3d396eb1
AK		 765 int err = 0;
766 int ctx, ring;
05aaa02d
DP		 767 irq_handler_t handler;
768 unsigned long flags = IRQF_SAMPLE_RANDOM;
3d396eb1 769
dcd56fdb
DP		 770 if (adapter->driver_mismatch)
771 return -EIO;
772
3d396eb1
AK		 773 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
774 err = netxen_init_firmware(adapter);
775 if (err != 0) {
776 printk(KERN_ERR "Failed to init firmware\n");
777 return -EIO;
778 }
3d396eb1
AK		 779
780 /* setup all the resources for the Phantom... */
781 /* this include the descriptors for rcv, tx, and status */
782 netxen_nic_clear_stats(adapter);
783 err = netxen_nic_hw_resources(adapter);
784 if (err) {
785 printk(KERN_ERR "Error in setting hw resources:%d\n",
786 err);
787 return err;
788 }
3d396eb1 789 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
cb8011ad 790 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++)
3d396eb1 791 netxen_post_rx_buffers(adapter, ctx, ring);
3d396eb1 792 }
7830b22c 793 adapter->irq = adapter->pdev->irq;
05aaa02d
DP		 794 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
795 handler = netxen_msi_intr;
796 else {
797 flags |= IRQF_SHARED;
798 handler = netxen_intr;
799 }
800 err = request_irq(adapter->irq, handler,
801 flags, netdev->name, adapter);
3d396eb1
AK		 802 if (err) {
803 printk(KERN_ERR "request_irq failed with: %d\n", err);
ed25ffa1 804 netxen_free_hw_resources(adapter);
3d396eb1
AK		 805 return err;
806 }
ed25ffa1
AK		 807
808 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
809 }
3d396eb1
AK		 810 /* Done here again so that even if phantom sw overwrote it,
811 * we set it */
595e3fb8
MT		 812 if (adapter->init_port
813 && adapter->init_port(adapter, adapter->portnum) != 0) {
814 printk(KERN_ERR "%s: Failed to initialize port %d\n",
815 netxen_nic_driver_name, adapter->portnum);
595e3fb8
MT		 816 return -EIO;
817 }
7eec517c 818 if (adapter->macaddr_set)
819 adapter->macaddr_set(adapter, netdev->dev_addr);
595e3fb8 820
3176ff3e 821 netxen_nic_set_link_parameters(adapter);
3d396eb1
AK		 822
823 netxen_nic_set_multi(netdev);
ed25ffa1 824 if (adapter->set_mtu)
3176ff3e 825 adapter->set_mtu(adapter, netdev->mtu);
ed25ffa1 826
dcd56fdb 827 mod_timer(&adapter->watchdog_timer, jiffies);
05aaa02d
DP		 828
829 napi_enable(&adapter->napi);
830 netxen_nic_enable_int(adapter);
831
dcd56fdb 832 netif_start_queue(netdev);
3d396eb1
AK		 833
834 return 0;
835}
836
837/*
838 * netxen_nic_close - Disables a network interface entry point
839 */
840static int netxen_nic_close(struct net_device *netdev)
841{
3176ff3e 842 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 843 int i, j;
844 struct netxen_cmd_buffer *cmd_buff;
845 struct netxen_skb_frag *buffrag;
846
847 netif_carrier_off(netdev);
848 netif_stop_queue(netdev);
bea3348e 849 napi_disable(&adapter->napi);
3d396eb1 850
72b0a7a8 851 if (adapter->stop_port)
852 adapter->stop_port(adapter);
853
e01872af 854 netxen_nic_disable_int(adapter);
855
3176ff3e
MT		 856 cmd_buff = adapter->cmd_buf_arr;
857 for (i = 0; i < adapter->max_tx_desc_count; i++) {
858 buffrag = cmd_buff->frag_array;
859 if (buffrag->dma) {
860 pci_unmap_single(adapter->pdev, buffrag->dma,
861 buffrag->length, PCI_DMA_TODEVICE);
96acb6eb 862 buffrag->dma = 0ULL;
3176ff3e
MT		 863 }
864 for (j = 0; j < cmd_buff->frag_count; j++) {
865 buffrag++;
3d396eb1 866 if (buffrag->dma) {
3176ff3e 867 pci_unmap_page(adapter->pdev, buffrag->dma,
4790654c 868 buffrag->length,
3176ff3e 869 PCI_DMA_TODEVICE);
96acb6eb 870 buffrag->dma = 0ULL;
3d396eb1 871 }
3d396eb1 872 }
3176ff3e
MT		 873 /* Free the skb we received in netxen_nic_xmit_frame */
874 if (cmd_buff->skb) {
875 dev_kfree_skb_any(cmd_buff->skb);
876 cmd_buff->skb = NULL;
877 }
878 cmd_buff++;
3d396eb1 879 }
96acb6eb
DP		 880 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
881 FLUSH_SCHEDULED_WORK();
882 del_timer_sync(&adapter->watchdog_timer);
883 }
3d396eb1
AK		 884
885 return 0;
886}
887
888static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
889{
3176ff3e 890 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1
AK		 891 struct netxen_hardware_context *hw = &adapter->ahw;
892 unsigned int first_seg_len = skb->len - skb->data_len;
893 struct netxen_skb_frag *buffrag;
894 unsigned int i;
895
ba53e6b4 896 u32 producer, consumer;
3d396eb1
AK		 897 u32 saved_producer = 0;
898 struct cmd_desc_type0 *hwdesc;
899 int k;
900 struct netxen_cmd_buffer *pbuf = NULL;
3d396eb1 901 int frag_count;
3d396eb1 902 int no_of_desc;
ba53e6b4 903 u32 num_txd = adapter->max_tx_desc_count;
3d396eb1 904
3d396eb1
AK		 905 frag_count = skb_shinfo(skb)->nr_frags + 1;
906
3d396eb1
AK		 907 /* There 4 fragments per descriptor */
908 no_of_desc = (frag_count + 3) >> 2;
cb8011ad
AK		 909 if (netdev->features & NETIF_F_TSO) {
910 if (skb_shinfo(skb)->gso_size > 0) {
911
3d396eb1 912 no_of_desc++;
ab6a5bb6 913 if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
c9bdd4b5 914 sizeof(struct ethhdr)) >
ed25ffa1 915 (sizeof(struct cmd_desc_type0) - 2)) {
cb8011ad
AK		 916 no_of_desc++;
917 }
3d396eb1
AK		 918 }
919 }
53a01e00 920
ba53e6b4
DP		 921 producer = adapter->cmd_producer;
922 smp_mb();
923 consumer = adapter->last_cmd_consumer;
924 if ((no_of_desc+2) > find_diff_among(producer, consumer, num_txd)) {
925 netif_stop_queue(netdev);
926 smp_mb();
927 return NETDEV_TX_BUSY;
53a01e00 928 }
3d396eb1 929
3d396eb1 930 /* Copy the descriptors into the hardware */
3d396eb1
AK		 931 saved_producer = producer;
932 hwdesc = &hw->cmd_desc_head[producer];
933 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
934 /* Take skb->data itself */
935 pbuf = &adapter->cmd_buf_arr[producer];
cb8011ad 936 if ((netdev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size > 0) {
a608ab9c 937 pbuf->mss = skb_shinfo(skb)->gso_size;
ed33ebe4 938 hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
3d396eb1
AK		 939 } else {
940 pbuf->mss = 0;
941 hwdesc->mss = 0;
942 }
3d396eb1
AK		 943 pbuf->total_length = skb->len;
944 pbuf->skb = skb;
945 pbuf->cmd = TX_ETHER_PKT;
946 pbuf->frag_count = frag_count;
3176ff3e 947 pbuf->port = adapter->portnum;
3d396eb1 948 buffrag = &pbuf->frag_array[0];
3176ff3e 949 buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
3d396eb1
AK		 950 PCI_DMA_TODEVICE);
951 buffrag->length = first_seg_len;
ed25ffa1
AK		 952 netxen_set_cmd_desc_totallength(hwdesc, skb->len);
953 netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
954 netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
3d396eb1 955
3176ff3e 956 netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
6c80b18d 957 netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
3d396eb1
AK		 958 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
959 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
960
961 for (i = 1, k = 1; i < frag_count; i++, k++) {
962 struct skb_frag_struct *frag;
963 int len, temp_len;
964 unsigned long offset;
965 dma_addr_t temp_dma;
966
967 /* move to next desc. if there is a need */
968 if ((i & 0x3) == 0) {
969 k = 0;
ba53e6b4 970 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 971 hwdesc = &hw->cmd_desc_head[producer];
972 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
53a01e00 973 pbuf = &adapter->cmd_buf_arr[producer];
974 pbuf->skb = NULL;
3d396eb1
AK		 975 }
976 frag = &skb_shinfo(skb)->frags[i - 1];
977 len = frag->size;
978 offset = frag->page_offset;
979
980 temp_len = len;
3176ff3e 981 temp_dma = pci_map_page(adapter->pdev, frag->page, offset,
3d396eb1
AK		 982 len, PCI_DMA_TODEVICE);
983
984 buffrag++;
985 buffrag->dma = temp_dma;
986 buffrag->length = temp_len;
987
3d396eb1
AK		 988 switch (k) {
989 case 0:
990 hwdesc->buffer1_length = cpu_to_le16(temp_len);
991 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
992 break;
993 case 1:
994 hwdesc->buffer2_length = cpu_to_le16(temp_len);
995 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
996 break;
997 case 2:
998 hwdesc->buffer3_length = cpu_to_le16(temp_len);
999 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
1000 break;
1001 case 3:
a608ab9c 1002 hwdesc->buffer4_length = cpu_to_le16(temp_len);
3d396eb1
AK		 1003 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
1004 break;
1005 }
1006 frag++;
1007 }
ba53e6b4 1008 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1009
1010 /* might change opcode to TX_TCP_LSO */
1011 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
1012
1013 /* For LSO, we need to copy the MAC/IP/TCP headers into
1014 * the descriptor ring
1015 */
ed25ffa1
AK		 1016 if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
1017 == TX_TCP_LSO) {
3d396eb1
AK		 1018 int hdr_len, first_hdr_len, more_hdr;
1019 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
ed25ffa1
AK		 1020 if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
1021 first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
3d396eb1
AK		 1022 more_hdr = 1;
1023 } else {
1024 first_hdr_len = hdr_len;
1025 more_hdr = 0;
1026 }
1027 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1028 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1029 pbuf = &adapter->cmd_buf_arr[producer];
1030 pbuf->skb = NULL;
3d396eb1
AK		 1031
1032 /* copy the first 64 bytes */
ed25ffa1 1033 memcpy(((void *)hwdesc) + 2,
3d396eb1 1034 (void *)(skb->data), first_hdr_len);
ba53e6b4 1035 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1036
1037 if (more_hdr) {
1038 hwdesc = &hw->cmd_desc_head[producer];
53a01e00 1039 pbuf = &adapter->cmd_buf_arr[producer];
1040 pbuf->skb = NULL;
3d396eb1
AK		 1041 /* copy the next 64 bytes - should be enough except
1042 * for pathological case
1043 */
d626f62b
ACM		 1044 skb_copy_from_linear_data_offset(skb, first_hdr_len,
1045 hwdesc,
1046 (hdr_len -
1047 first_hdr_len));
ba53e6b4 1048 producer = get_next_index(producer, num_txd);
3d396eb1
AK		 1049 }
1050 }
6c80b18d 1051
ba53e6b4 1052 adapter->cmd_producer = producer;
5dc16268 1053 adapter->stats.txbytes += skb->len;
6c80b18d 1054
ba53e6b4 1055 netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
3d396eb1 1056
ba53e6b4 1057 adapter->stats.xmitcalled++;
3d396eb1
AK		 1058 netdev->trans_start = jiffies;
1059
3d396eb1
AK		 1060 return NETDEV_TX_OK;
1061}
1062
1063static void netxen_watchdog(unsigned long v)
1064{
1065 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
ed25ffa1
AK		 1066
1067 SCHEDULE_WORK(&adapter->watchdog_task);
3d396eb1
AK		 1068}
1069
1070static void netxen_tx_timeout(struct net_device *netdev)
1071{
3176ff3e
MT		 1072 struct netxen_adapter *adapter = (struct netxen_adapter *)
1073 netdev_priv(netdev);
1074 SCHEDULE_WORK(&adapter->tx_timeout_task);
3d396eb1
AK		 1075}
1076
6d5aefb8 1077static void netxen_tx_timeout_task(struct work_struct *work)
3d396eb1 1078{
4790654c 1079 struct netxen_adapter *adapter =
3176ff3e 1080 container_of(work, struct netxen_adapter, tx_timeout_task);
3d396eb1
AK		 1081
1082 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
6c80b18d 1083 netxen_nic_driver_name, adapter->netdev->name);
3d396eb1 1084
ba53e6b4
DP		 1085 netxen_nic_disable_int(adapter);
1086 napi_disable(&adapter->napi);
1087
6c80b18d 1088 adapter->netdev->trans_start = jiffies;
ba53e6b4
DP		 1089
1090 napi_enable(&adapter->napi);
1091 netxen_nic_enable_int(adapter);
6c80b18d 1092 netif_wake_queue(adapter->netdev);
3d396eb1
AK		 1093}
1094
05aaa02d
DP		 1095static inline void
1096netxen_handle_int(struct netxen_adapter *adapter)
3d396eb1 1097{
2d1a3bbd 1098 netxen_nic_disable_int(adapter);
05aaa02d 1099 napi_schedule(&adapter->napi);
3d396eb1
AK		 1100}
1101
e4c93c81 1102static irqreturn_t netxen_intr(int irq, void *data)
3d396eb1 1103{
1daec86a 1104 struct netxen_adapter *adapter = data;
e01872af 1105 u32 our_int = 0;
3d396eb1 1106
05aaa02d
DP		 1107 our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
1108 /* not our interrupt */
1109 if ((our_int & (0x80 << adapter->portnum)) == 0)
1110 return IRQ_NONE;
e01872af 1111
1112 if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
1113 /* claim interrupt */
05aaa02d 1114 writel(our_int & ~((u32)(0x80 << adapter->portnum)),
e01872af 1115 NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
e01872af 1116 }
1117
05aaa02d 1118 netxen_handle_int(adapter);
3d396eb1
AK		 1119
1120 return IRQ_HANDLED;
1121}
1122
e4c93c81 1123static irqreturn_t netxen_msi_intr(int irq, void *data)
05aaa02d
DP		 1124{
1125 struct netxen_adapter *adapter = data;
1126
1127 netxen_handle_int(adapter);
1128 return IRQ_HANDLED;
1129}
1130
bea3348e 1131static int netxen_nic_poll(struct napi_struct *napi, int budget)
3d396eb1 1132{
bea3348e 1133 struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);
05aaa02d 1134 int tx_complete;
3d396eb1 1135 int ctx;
bea3348e 1136 int work_done;
3d396eb1 1137
05aaa02d 1138 tx_complete = netxen_process_cmd_ring(adapter);
3d396eb1 1139
80922fbc 1140 work_done = 0;
3d396eb1
AK		 1141 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1142 /*
1143 * Fairness issue. This will give undue weight to the
1144 * receive context 0.
1145 */
1146
1147 /*
1148 * To avoid starvation, we give each of our receivers,
1149 * a fraction of the quota. Sometimes, it might happen that we
1150 * have enough quota to process every packet, but since all the
1151 * packets are on one context, it gets only half of the quota,
1152 * and ends up not processing it.
1153 */
bea3348e
SH		 1154 work_done += netxen_process_rcv_ring(adapter, ctx,
1155 budget / MAX_RCV_CTX);
3d396eb1
AK		 1156 }
1157
05aaa02d
DP		 1158 if ((work_done < budget) && tx_complete) {
1159 netif_rx_complete(adapter->netdev, &adapter->napi);
3d396eb1
AK		 1160 netxen_nic_enable_int(adapter);
1161 }
1162
bea3348e 1163 return work_done;
3d396eb1
AK		 1164}
1165
1166#ifdef CONFIG_NET_POLL_CONTROLLER
1167static void netxen_nic_poll_controller(struct net_device *netdev)
1168{
3176ff3e 1169 struct netxen_adapter *adapter = netdev_priv(netdev);
3d396eb1 1170 disable_irq(adapter->irq);
1494a814 1171 netxen_intr(adapter->irq, adapter);
3d396eb1
AK		 1172 enable_irq(adapter->irq);
1173}
1174#endif
3d396eb1
AK		 1175
1176static struct pci_driver netxen_driver = {
1177 .name = netxen_nic_driver_name,
1178 .id_table = netxen_pci_tbl,
1179 .probe = netxen_nic_probe,
1180 .remove = __devexit_p(netxen_nic_remove)
1181};
1182
1183/* Driver Registration on NetXen card */
1184
1185static int __init netxen_init_module(void)
1186{
79ea13ce 1187 if ((netxen_workq = create_singlethread_workqueue("netxen")) == NULL)
ed25ffa1
AK		 1188 return -ENOMEM;
1189
184231bd 1190 return pci_register_driver(&netxen_driver);
3d396eb1
AK		 1191}
1192
1193module_init(netxen_init_module);
1194
1195static void __exit netxen_exit_module(void)
1196{
3d396eb1 1197 pci_unregister_driver(&netxen_driver);
9de06610 1198 destroy_workqueue(netxen_workq);
3d396eb1
AK		 1199}
1200
1201module_exit(netxen_exit_module);
Linux 6.x block layer and io_uring tree(s)