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Add NetXen 1G/10G ethernet driver.
[mirror_ubuntu-artful-kernel.git] / drivers / net / netxen / netxen_nic_main.c
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3d396eb1
AK		 1/*
2 * Copyright (C) 2003 - 2006 NetXen, Inc.
3 * All rights reserved.
4 *
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.
9 *
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.
14 *
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.
19 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
22 *
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
34#include "netxen_nic_hw.h"
35
36#include "netxen_nic.h"
37#define DEFINE_GLOBAL_RECV_CRB
38#include "netxen_nic_phan_reg.h"
39#include "netxen_nic_ioctl.h"
40
41MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
42MODULE_LICENSE("GPL");
43MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID);
44
45char netxen_nic_driver_name[] = "netxen";
46static char netxen_nic_driver_string[] = "NetXen Network Driver version "
47 NETXEN_NIC_LINUX_VERSIONID "-" NETXEN_NIC_BUILD_NO;
48
49#define NETXEN_NETDEV_WEIGHT 120
50#define NETXEN_ADAPTER_UP_MAGIC 777
51
52/* Local functions to NetXen NIC driver */
53static int __devinit netxen_nic_probe(struct pci_dev *pdev,
54 const struct pci_device_id *ent);
55static void __devexit netxen_nic_remove(struct pci_dev *pdev);
56static int netxen_nic_open(struct net_device *netdev);
57static int netxen_nic_close(struct net_device *netdev);
58static int netxen_nic_xmit_frame(struct sk_buff *, struct net_device *);
59static void netxen_tx_timeout(struct net_device *netdev);
60static void netxen_tx_timeout_task(struct net_device *netdev);
61static void netxen_watchdog(unsigned long);
62static int netxen_handle_int(struct netxen_adapter *, struct net_device *);
63static int netxen_nic_ioctl(struct net_device *netdev,
64 struct ifreq *ifr, int cmd);
65static int netxen_nic_poll(struct net_device *dev, int *budget);
66#ifdef CONFIG_NET_POLL_CONTROLLER
67static void netxen_nic_poll_controller(struct net_device *netdev);
68#endif
69static irqreturn_t netxen_intr(int irq, void *data, struct pt_regs *regs);
70
71/* PCI Device ID Table */
72static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
73 {PCI_DEVICE(0x4040, 0x0001)},
74 {PCI_DEVICE(0x4040, 0x0002)},
75 {PCI_DEVICE(0x4040, 0x0003)},
76 {PCI_DEVICE(0x4040, 0x0004)},
77 {PCI_DEVICE(0x4040, 0x0005)},
78 {0,}
79};
80
81MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
82
83/*
84 * netxen_nic_probe()
85 *
86 * The Linux system will invoke this after identifying the vendor ID and
87 * device Id in the pci_tbl supported by this module.
88 *
89 * A quad port card has one operational PCI config space, (function 0),
90 * which is used to access all four ports.
91 *
92 * This routine will initialize the adapter, and setup the global parameters
93 * along with the port's specific structure.
94 */
95static int __devinit
96netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
97{
98 struct net_device *netdev = NULL;
99 struct netxen_adapter *adapter = NULL;
100 struct netxen_port *port = NULL;
101 u8 __iomem *mem_ptr = NULL;
102 unsigned long mem_base, mem_len;
103 int pci_using_dac, i, err;
104 int ring;
105 struct netxen_recv_context *recv_ctx = NULL;
106 struct netxen_rcv_desc_ctx *rcv_desc = NULL;
107 struct netxen_cmd_buffer *cmd_buf_arr = NULL;
108 u64 mac_addr[FLASH_NUM_PORTS + 1];
109 int valid_mac;
110
111 if ((err = pci_enable_device(pdev)))
112 return err;
113 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
114 err = -ENODEV;
115 goto err_out_disable_pdev;
116 }
117
118 if ((err = pci_request_regions(pdev, netxen_nic_driver_name)))
119 goto err_out_disable_pdev;
120
121 pci_set_master(pdev);
122 if ((pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) &&
123 (pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) == 0))
124 pci_using_dac = 1;
125 else {
126 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) ||
127 (err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)))
128 goto err_out_free_res;
129
130 pci_using_dac = 0;
131 }
132
133 /* remap phys address */
134 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
135 mem_len = pci_resource_len(pdev, 0);
136
137 /* 128 Meg of memory */
138 mem_ptr = ioremap(mem_base, NETXEN_PCI_MAPSIZE_BYTES);
139 if (mem_ptr == 0UL) {
140 printk(KERN_ERR "%s: Cannot ioremap adapter memory aborting."
141 ":%p\n", netxen_nic_driver_name, mem_ptr);
142 err = -EIO;
143 goto err_out_free_res;
144 }
145
146/*
147 * Allocate a adapter structure which will manage all the initialization
148 * as well as the common resources for all ports...
149 * all the ports will have pointer to this adapter as well as Adapter
150 * will have pointers of all the ports structures.
151 */
152
153 /* One adapter structure for all 4 ports.... */
154 adapter = kzalloc(sizeof(struct netxen_adapter), GFP_KERNEL);
155 if (adapter == NULL) {
156 printk(KERN_ERR "%s: Could not allocate adapter memory:%d\n",
157 netxen_nic_driver_name,
158 (int)sizeof(struct netxen_adapter));
159 err = -ENOMEM;
160 goto err_out_iounmap;
161 }
162
163 adapter->max_tx_desc_count = MAX_CMD_DESCRIPTORS;
164 adapter->max_rx_desc_count = MAX_RCV_DESCRIPTORS;
165 adapter->max_jumbo_rx_desc_count = MAX_JUMBO_RCV_DESCRIPTORS;
166
167 pci_set_drvdata(pdev, adapter);
168
169 cmd_buf_arr = (struct netxen_cmd_buffer *)vmalloc(TX_RINGSIZE);
170 if (cmd_buf_arr == NULL) {
171 err = -ENOMEM;
172 goto err_out_free_adapter;
173 }
174 memset(cmd_buf_arr, 0, TX_RINGSIZE);
175
176 for (i = 0; i < MAX_RCV_CTX; ++i) {
177 recv_ctx = &adapter->recv_ctx[i];
178 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
179 rcv_desc = &recv_ctx->rcv_desc[ring];
180 switch (RCV_DESC_TYPE(ring)) {
181 case RCV_DESC_NORMAL:
182 rcv_desc->max_rx_desc_count =
183 adapter->max_rx_desc_count;
184 rcv_desc->flags = RCV_DESC_NORMAL;
185 rcv_desc->dma_size = RX_DMA_MAP_LEN;
186 rcv_desc->skb_size = MAX_RX_BUFFER_LENGTH;
187 break;
188
189 case RCV_DESC_JUMBO:
190 rcv_desc->max_rx_desc_count =
191 adapter->max_jumbo_rx_desc_count;
192 rcv_desc->flags = RCV_DESC_JUMBO;
193 rcv_desc->dma_size = RX_JUMBO_DMA_MAP_LEN;
194 rcv_desc->skb_size = MAX_RX_JUMBO_BUFFER_LENGTH;
195 break;
196
197 }
198 rcv_desc->rx_buf_arr = (struct netxen_rx_buffer *)
199 vmalloc(RCV_BUFFSIZE);
200
201 if (rcv_desc->rx_buf_arr == NULL) {
202 err = -ENOMEM;
203 goto err_out_free_rx_buffer;
204 }
205 memset(rcv_desc->rx_buf_arr, 0, RCV_BUFFSIZE);
206 }
207
208 }
209
210 adapter->ops = kzalloc(sizeof(struct netxen_drvops), GFP_KERNEL);
211 if (adapter->ops == NULL) {
212 printk(KERN_ERR
213 "%s: Could not allocate memory for adapter->ops:%d\n",
214 netxen_nic_driver_name,
215 (int)sizeof(struct netxen_adapter));
216 err = -ENOMEM;
217 goto err_out_free_rx_buffer;
218 }
219
220 adapter->cmd_buf_arr = cmd_buf_arr;
221 adapter->ahw.pci_base = mem_ptr;
222 spin_lock_init(&adapter->tx_lock);
223 spin_lock_init(&adapter->lock);
224 /* initialize the buffers in adapter */
225 netxen_initialize_adapter_sw(adapter);
226 /*
227 * Set the CRB window to invalid. If any register in window 0 is
228 * accessed it should set the window to 0 and then reset it to 1.
229 */
230 adapter->curr_window = 255;
231 /*
232 * Adapter in our case is quad port so initialize it before
233 * initializing the ports
234 */
235 netxen_initialize_adapter_hw(adapter); /* initialize the adapter */
236
237 netxen_initialize_adapter_ops(adapter);
238
239 init_timer(&adapter->watchdog_timer);
240 adapter->ahw.xg_linkup = 0;
241 adapter->watchdog_timer.function = &netxen_watchdog;
242 adapter->watchdog_timer.data = (unsigned long)adapter;
243 INIT_WORK(&adapter->watchdog_task,
244 (void (*)(void *))netxen_watchdog_task, adapter);
245 adapter->ahw.pdev = pdev;
246 adapter->proc_cmd_buf_counter = 0;
247 pci_read_config_byte(pdev, PCI_REVISION_ID, &adapter->ahw.revision_id);
248
249 if (pci_enable_msi(pdev)) {
250 adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
251 printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
252 " error\n", netxen_nic_driver_name);
253 } else
254 adapter->flags |= NETXEN_NIC_MSI_ENABLED;
255
256 if (netxen_is_flash_supported(adapter) == 0 &&
257 netxen_get_flash_mac_addr(adapter, mac_addr) == 0)
258 valid_mac = 1;
259 else
260 valid_mac = 0;
261
262 /* initialize the all the ports */
263
264 for (i = 0; i < adapter->ahw.max_ports; i++) {
265 netdev = alloc_etherdev(sizeof(struct netxen_port));
266 if (!netdev) {
267 printk(KERN_ERR "%s: could not allocate netdev for port"
268 " %d\n", netxen_nic_driver_name, i + 1);
269 goto err_out_free_dev;
270 }
271
272 SET_MODULE_OWNER(netdev);
273
274 port = netdev_priv(netdev);
275 port->netdev = netdev;
276 port->pdev = pdev;
277 port->adapter = adapter;
278 port->portnum = i; /* Gigabit port number from 0-3 */
279
280 netdev->open = netxen_nic_open;
281 netdev->stop = netxen_nic_close;
282 netdev->hard_start_xmit = netxen_nic_xmit_frame;
283 netdev->get_stats = netxen_nic_get_stats;
284 netdev->set_multicast_list = netxen_nic_set_multi;
285 netdev->set_mac_address = netxen_nic_set_mac;
286 netdev->change_mtu = netxen_nic_change_mtu;
287 netdev->do_ioctl = netxen_nic_ioctl;
288 netdev->tx_timeout = netxen_tx_timeout;
289 netdev->watchdog_timeo = HZ;
290
291 SET_ETHTOOL_OPS(netdev, &netxen_nic_ethtool_ops);
292 netdev->poll = netxen_nic_poll;
293 netdev->weight = NETXEN_NETDEV_WEIGHT;
294#ifdef CONFIG_NET_POLL_CONTROLLER
295 netdev->poll_controller = netxen_nic_poll_controller;
296#endif
297 /* ScatterGather support */
298 netdev->features = NETIF_F_SG;
299 netdev->features |= NETIF_F_IP_CSUM;
300 netdev->features |= NETIF_F_TSO;
301
302 if (pci_using_dac)
303 netdev->features |= NETIF_F_HIGHDMA;
304
305 if (valid_mac) {
306 unsigned char *p = (unsigned char *)&mac_addr[i];
307 netdev->dev_addr[0] = *(p + 5);
308 netdev->dev_addr[1] = *(p + 4);
309 netdev->dev_addr[2] = *(p + 3);
310 netdev->dev_addr[3] = *(p + 2);
311 netdev->dev_addr[4] = *(p + 1);
312 netdev->dev_addr[5] = *(p + 0);
313
314 memcpy(netdev->perm_addr, netdev->dev_addr,
315 netdev->addr_len);
316 if (!is_valid_ether_addr(netdev->perm_addr)) {
317 printk(KERN_ERR "%s: Bad MAC address "
318 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
319 netxen_nic_driver_name,
320 netdev->dev_addr[0],
321 netdev->dev_addr[1],
322 netdev->dev_addr[2],
323 netdev->dev_addr[3],
324 netdev->dev_addr[4],
325 netdev->dev_addr[5]);
326 } else {
327 if (adapter->ops->macaddr_set)
328 adapter->ops->macaddr_set(port,
329 netdev->
330 dev_addr);
331 }
332 }
333 INIT_WORK(&adapter->tx_timeout_task,
334 (void (*)(void *))netxen_tx_timeout_task, netdev);
335 netif_carrier_off(netdev);
336 netif_stop_queue(netdev);
337
338 if ((err = register_netdev(netdev))) {
339 printk(KERN_ERR "%s: register_netdev failed port #%d"
340 " aborting\n", netxen_nic_driver_name, i + 1);
341 err = -EIO;
342 free_netdev(netdev);
343 goto err_out_free_dev;
344 }
345 adapter->port_count++;
346 adapter->active_ports = 0;
347 adapter->port[i] = port;
348 }
349
350 /*
351 * Initialize all the CRB registers here.
352 */
353 /* Window = 1 */
354 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
355 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
356 writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_HOST_CMD_ADDR_LO));
357
358 netxen_phantom_init(adapter);
359 /*
360 * delay a while to ensure that the Pegs are up & running.
361 * Otherwise, we might see some flaky behaviour.
362 */
363 udelay(100);
364
365 switch (adapter->ahw.board_type) {
366 case NETXEN_NIC_GBE:
367 printk("%s: QUAD GbE board initialized\n",
368 netxen_nic_driver_name);
369 break;
370
371 case NETXEN_NIC_XGBE:
372 printk("%s: XGbE board initialized\n", netxen_nic_driver_name);
373 break;
374 }
375
376 adapter->driver_mismatch = 0;
377
378 return 0;
379
380 err_out_free_dev:
381 if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
382 pci_disable_msi(pdev);
383 for (i = 0; i < adapter->port_count; i++) {
384 port = adapter->port[i];
385 if ((port) && (port->netdev)) {
386 unregister_netdev(port->netdev);
387 free_netdev(port->netdev);
388 }
389 }
390 kfree(adapter->ops);
391
392 err_out_free_rx_buffer:
393 for (i = 0; i < MAX_RCV_CTX; ++i) {
394 recv_ctx = &adapter->recv_ctx[i];
395 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
396 rcv_desc = &recv_ctx->rcv_desc[ring];
397 if (rcv_desc->rx_buf_arr != NULL) {
398 vfree(rcv_desc->rx_buf_arr);
399 rcv_desc->rx_buf_arr = NULL;
400 }
401 }
402 }
403
404 vfree(cmd_buf_arr);
405
406 kfree(adapter->port);
407
408 err_out_free_adapter:
409 pci_set_drvdata(pdev, NULL);
410 kfree(adapter);
411
412 err_out_iounmap:
413 iounmap(mem_ptr);
414 err_out_free_res:
415 pci_release_regions(pdev);
416 err_out_disable_pdev:
417 pci_disable_device(pdev);
418 return err;
419}
420
421static void __devexit netxen_nic_remove(struct pci_dev *pdev)
422{
423 struct netxen_adapter *adapter;
424 struct netxen_port *port;
425 struct netxen_rx_buffer *buffer;
426 struct netxen_recv_context *recv_ctx;
427 struct netxen_rcv_desc_ctx *rcv_desc;
428 int i;
429 int ctxid, ring;
430
431 adapter = pci_get_drvdata(pdev);
432 if (adapter == NULL)
433 return;
434
435 netxen_nic_stop_all_ports(adapter);
436 /* leave the hw in the same state as reboot */
437 netxen_pinit_from_rom(adapter, 0);
438 udelay(500);
439 netxen_load_firmware(adapter);
440
441 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
442 netxen_nic_disable_int(adapter);
443
444 udelay(500); /* Delay for a while to drain the DMA engines */
445 for (i = 0; i < adapter->port_count; i++) {
446 port = adapter->port[i];
447 if ((port) && (port->netdev)) {
448 unregister_netdev(port->netdev);
449 free_netdev(port->netdev);
450 }
451 }
452
453 if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
454 pci_disable_msi(pdev);
455 pci_set_drvdata(pdev, NULL);
456 if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
457 netxen_free_hw_resources(adapter);
458
459 iounmap(adapter->ahw.pci_base);
460
461 pci_release_regions(pdev);
462 pci_disable_device(pdev);
463
464 for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
465 recv_ctx = &adapter->recv_ctx[ctxid];
466 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
467 rcv_desc = &recv_ctx->rcv_desc[ring];
468 for (i = 0; i < rcv_desc->max_rx_desc_count; ++i) {
469 buffer = &(rcv_desc->rx_buf_arr[i]);
470 if (buffer->state == NETXEN_BUFFER_FREE)
471 continue;
472 pci_unmap_single(pdev, buffer->dma,
473 rcv_desc->dma_size,
474 PCI_DMA_FROMDEVICE);
475 if (buffer->skb != NULL)
476 dev_kfree_skb_any(buffer->skb);
477 }
478 vfree(rcv_desc->rx_buf_arr);
479 }
480 }
481
482 vfree(adapter->cmd_buf_arr);
483 kfree(adapter->ops);
484 kfree(adapter);
485}
486
487/*
488 * Called when a network interface is made active
489 * @returns 0 on success, negative value on failure
490 */
491static int netxen_nic_open(struct net_device *netdev)
492{
493 struct netxen_port *port = netdev_priv(netdev);
494 struct netxen_adapter *adapter = port->adapter;
495 struct netxen_rcv_desc_ctx *rcv_desc;
496 int err = 0;
497 int ctx, ring;
498
499 if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
500 err = netxen_init_firmware(adapter);
501 if (err != 0) {
502 printk(KERN_ERR "Failed to init firmware\n");
503 return -EIO;
504 }
505 netxen_nic_flash_print(adapter);
506
507 /* setup all the resources for the Phantom... */
508 /* this include the descriptors for rcv, tx, and status */
509 netxen_nic_clear_stats(adapter);
510 err = netxen_nic_hw_resources(adapter);
511 if (err) {
512 printk(KERN_ERR "Error in setting hw resources:%d\n",
513 err);
514 return err;
515 }
516 if (adapter->ops->init_port
517 && adapter->ops->init_port(adapter, port->portnum) != 0) {
518 printk(KERN_ERR "%s: Failed to initialize port %d\n",
519 netxen_nic_driver_name, port->portnum);
520 netxen_free_hw_resources(adapter);
521 return -EIO;
522 }
523 if (adapter->ops->init_niu)
524 adapter->ops->init_niu(adapter);
525 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
526 for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
527 rcv_desc =
528 &adapter->recv_ctx[ctx].rcv_desc[ring];
529 netxen_post_rx_buffers(adapter, ctx, ring);
530 }
531 }
532 adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
533 }
534 adapter->active_ports++;
535 if (adapter->active_ports == 1) {
536 err = request_irq(adapter->ahw.pdev->irq, &netxen_intr,
537 SA_SHIRQ | SA_SAMPLE_RANDOM, netdev->name,
538 adapter);
539 if (err) {
540 printk(KERN_ERR "request_irq failed with: %d\n", err);
541 adapter->active_ports--;
542 return err;
543 }
544 adapter->irq = adapter->ahw.pdev->irq;
545 if (!adapter->driver_mismatch)
546 mod_timer(&adapter->watchdog_timer, jiffies);
547
548 netxen_nic_enable_int(adapter);
549 }
550
551 /* Done here again so that even if phantom sw overwrote it,
552 * we set it */
553 if (adapter->ops->macaddr_set)
554 adapter->ops->macaddr_set(port, netdev->dev_addr);
555 netxen_nic_set_link_parameters(port);
556
557 netxen_nic_set_multi(netdev);
558 if (!adapter->driver_mismatch)
559 netif_start_queue(netdev);
560
561 return 0;
562}
563
564/*
565 * netxen_nic_close - Disables a network interface entry point
566 */
567static int netxen_nic_close(struct net_device *netdev)
568{
569 struct netxen_port *port = netdev_priv(netdev);
570 struct netxen_adapter *adapter = port->adapter;
571 int i, j;
572 struct netxen_cmd_buffer *cmd_buff;
573 struct netxen_skb_frag *buffrag;
574
575 netif_carrier_off(netdev);
576 netif_stop_queue(netdev);
577
578 /* disable phy_ints */
579 if (adapter->ops->disable_phy_interrupts)
580 adapter->ops->disable_phy_interrupts(adapter, port->portnum);
581
582 adapter->active_ports--;
583
584 if (!adapter->active_ports) {
585 netxen_nic_disable_int(adapter);
586 if (adapter->irq)
587 free_irq(adapter->irq, adapter);
588 cmd_buff = adapter->cmd_buf_arr;
589 for (i = 0; i < adapter->max_tx_desc_count; i++) {
590 buffrag = cmd_buff->frag_array;
591 if (buffrag->dma) {
592 pci_unmap_single(port->pdev, buffrag->dma,
593 buffrag->length,
594 PCI_DMA_TODEVICE);
595 buffrag->dma = (u64) NULL;
596 }
597 for (j = 0; j < cmd_buff->frag_count; j++) {
598 buffrag++;
599 if (buffrag->dma) {
600 pci_unmap_page(port->pdev,
601 buffrag->dma,
602 buffrag->length,
603 PCI_DMA_TODEVICE);
604 buffrag->dma = (u64) NULL;
605 }
606 }
607 /* Free the skb we received in netxen_nic_xmit_frame */
608 if (cmd_buff->skb) {
609 dev_kfree_skb_any(cmd_buff->skb);
610 cmd_buff->skb = NULL;
611 }
612 cmd_buff++;
613 }
614 del_timer_sync(&adapter->watchdog_timer);
615 }
616
617 return 0;
618}
619
620static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
621{
622 struct netxen_port *port = netdev_priv(netdev);
623 struct netxen_adapter *adapter = port->adapter;
624 struct netxen_hardware_context *hw = &adapter->ahw;
625 unsigned int first_seg_len = skb->len - skb->data_len;
626 struct netxen_skb_frag *buffrag;
627 unsigned int i;
628
629 u32 producer = 0;
630 u32 saved_producer = 0;
631 struct cmd_desc_type0 *hwdesc;
632 int k;
633 struct netxen_cmd_buffer *pbuf = NULL;
634 unsigned int tries = 0;
635 static int dropped_packet = 0;
636 int frag_count;
637 u32 local_producer = 0;
638 u32 max_tx_desc_count = 0;
639 u32 last_cmd_consumer = 0;
640 int no_of_desc;
641
642 port->stats.xmitcalled++;
643 frag_count = skb_shinfo(skb)->nr_frags + 1;
644
645 if (unlikely(skb->len <= 0)) {
646 dev_kfree_skb_any(skb);
647 port->stats.badskblen++;
648 return NETDEV_TX_OK;
649 }
650
651 if (frag_count > MAX_BUFFERS_PER_CMD) {
652 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
653 "too large, can handle only %d frags\n",
654 netxen_nic_driver_name, netdev->name,
655 frag_count, MAX_BUFFERS_PER_CMD);
656 port->stats.txdropped++;
657 if ((++dropped_packet & 0xff) == 0xff)
658 printk("%s: %s droppped packets = %d\n",
659 netxen_nic_driver_name, netdev->name,
660 dropped_packet);
661
662 return NETDEV_TX_OK;
663 }
664
665 /*
666 * Everything is set up. Now, we just need to transmit it out.
667 * Note that we have to copy the contents of buffer over to
668 * right place. Later on, this can be optimized out by de-coupling the
669 * producer index from the buffer index.
670 */
671 retry_getting_window:
672 spin_lock_bh(&adapter->tx_lock);
673 if (adapter->total_threads == MAX_XMIT_PRODUCERS) {
674 spin_unlock_bh(&adapter->tx_lock);
675 /*
676 * Yield CPU
677 */
678 if (!in_atomic())
679 schedule();
680 else {
681 for (i = 0; i < 20; i++)
682 cpu_relax(); /*This a nop instr on i386 */
683 }
684 goto retry_getting_window;
685 }
686 local_producer = adapter->cmd_producer;
687 /* There 4 fragments per descriptor */
688 no_of_desc = (frag_count + 3) >> 2;
689 if (skb_shinfo(skb)->gso_size > 0) {
690 no_of_desc++;
691 if (((skb->nh.iph)->ihl * sizeof(u32)) +
692 ((skb->h.th)->doff * sizeof(u32)) +
693 sizeof(struct ethhdr) >
694 (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
695 no_of_desc++;
696 }
697 }
698 k = adapter->cmd_producer;
699 max_tx_desc_count = adapter->max_tx_desc_count;
700 last_cmd_consumer = adapter->last_cmd_consumer;
701 if ((k + no_of_desc) >=
702 ((last_cmd_consumer <= k) ? last_cmd_consumer + max_tx_desc_count :
703 last_cmd_consumer)) {
704 spin_unlock_bh(&adapter->tx_lock);
705 if (tries == 0) {
706 local_bh_disable();
707 netxen_process_cmd_ring((unsigned long)adapter);
708 local_bh_enable();
709 ++tries;
710 goto retry_getting_window;
711 } else {
712 port->stats.nocmddescriptor++;
713 DPRINTK(ERR, "No command descriptors available,"
714 " producer = %d, consumer = %d count=%llu,"
715 " dropping packet\n", producer,
716 adapter->last_cmd_consumer,
717 port->stats.nocmddescriptor);
718
719 spin_lock_bh(&adapter->tx_lock);
720 netif_stop_queue(netdev);
721 port->flags |= NETXEN_NETDEV_STATUS;
722 spin_unlock_bh(&adapter->tx_lock);
723 return NETDEV_TX_BUSY;
724 }
725 }
726 k = get_index_range(k, max_tx_desc_count, no_of_desc);
727 adapter->cmd_producer = k;
728 adapter->total_threads++;
729 adapter->num_threads++;
730
731 spin_unlock_bh(&adapter->tx_lock);
732 /* Copy the descriptors into the hardware */
733 producer = local_producer;
734 saved_producer = producer;
735 hwdesc = &hw->cmd_desc_head[producer];
736 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
737 /* Take skb->data itself */
738 pbuf = &adapter->cmd_buf_arr[producer];
739 if (skb_shinfo(skb)->gso_size > 0) {
740 pbuf->mss = skb_shinfo(skb)->gso_size;
741 hwdesc->mss = skb_shinfo(skb)->gso_size;
742 } else {
743 pbuf->mss = 0;
744 hwdesc->mss = 0;
745 }
746 pbuf->no_of_descriptors = no_of_desc;
747 pbuf->total_length = skb->len;
748 pbuf->skb = skb;
749 pbuf->cmd = TX_ETHER_PKT;
750 pbuf->frag_count = frag_count;
751 pbuf->port = port->portnum;
752 buffrag = &pbuf->frag_array[0];
753 buffrag->dma = pci_map_single(port->pdev, skb->data, first_seg_len,
754 PCI_DMA_TODEVICE);
755 buffrag->length = first_seg_len;
756 CMD_DESC_TOTAL_LENGTH_WRT(hwdesc, skb->len);
757 hwdesc->num_of_buffers = frag_count;
758 hwdesc->opcode = TX_ETHER_PKT;
759
760 CMD_DESC_PORT_WRT(hwdesc, port->portnum);
761 hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
762 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
763
764 for (i = 1, k = 1; i < frag_count; i++, k++) {
765 struct skb_frag_struct *frag;
766 int len, temp_len;
767 unsigned long offset;
768 dma_addr_t temp_dma;
769
770 /* move to next desc. if there is a need */
771 if ((i & 0x3) == 0) {
772 k = 0;
773 producer = get_next_index(producer,
774 adapter->max_tx_desc_count);
775 hwdesc = &hw->cmd_desc_head[producer];
776 memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
777 }
778 frag = &skb_shinfo(skb)->frags[i - 1];
779 len = frag->size;
780 offset = frag->page_offset;
781
782 temp_len = len;
783 temp_dma = pci_map_page(port->pdev, frag->page, offset,
784 len, PCI_DMA_TODEVICE);
785
786 buffrag++;
787 buffrag->dma = temp_dma;
788 buffrag->length = temp_len;
789
790 DPRINTK(INFO, "for loop. i=%d k=%d\n", i, k);
791 switch (k) {
792 case 0:
793 hwdesc->buffer1_length = cpu_to_le16(temp_len);
794 hwdesc->addr_buffer1 = cpu_to_le64(temp_dma);
795 break;
796 case 1:
797 hwdesc->buffer2_length = cpu_to_le16(temp_len);
798 hwdesc->addr_buffer2 = cpu_to_le64(temp_dma);
799 break;
800 case 2:
801 hwdesc->buffer3_length = cpu_to_le16(temp_len);
802 hwdesc->addr_buffer3 = cpu_to_le64(temp_dma);
803 break;
804 case 3:
805 hwdesc->buffer4_length = temp_len;
806 hwdesc->addr_buffer4 = cpu_to_le64(temp_dma);
807 break;
808 }
809 frag++;
810 }
811 producer = get_next_index(producer, adapter->max_tx_desc_count);
812
813 /* might change opcode to TX_TCP_LSO */
814 netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
815
816 /* For LSO, we need to copy the MAC/IP/TCP headers into
817 * the descriptor ring
818 */
819 if (hw->cmd_desc_head[saved_producer].opcode == TX_TCP_LSO) {
820 int hdr_len, first_hdr_len, more_hdr;
821 hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
822 if (hdr_len > (sizeof(struct cmd_desc_type0) - NET_IP_ALIGN)) {
823 first_hdr_len =
824 sizeof(struct cmd_desc_type0) - NET_IP_ALIGN;
825 more_hdr = 1;
826 } else {
827 first_hdr_len = hdr_len;
828 more_hdr = 0;
829 }
830 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
831 hwdesc = &hw->cmd_desc_head[producer];
832
833 /* copy the first 64 bytes */
834 memcpy(((void *)hwdesc) + NET_IP_ALIGN,
835 (void *)(skb->data), first_hdr_len);
836 producer = get_next_index(producer, max_tx_desc_count);
837
838 if (more_hdr) {
839 hwdesc = &hw->cmd_desc_head[producer];
840 /* copy the next 64 bytes - should be enough except
841 * for pathological case
842 */
843 memcpy((void *)hwdesc, (void *)(skb->data) +
844 first_hdr_len, hdr_len - first_hdr_len);
845 producer = get_next_index(producer, max_tx_desc_count);
846 }
847 }
848 spin_lock_bh(&adapter->tx_lock);
849 port->stats.txbytes +=
850 CMD_DESC_TOTAL_LENGTH(&hw->cmd_desc_head[saved_producer]);
851 /* Code to update the adapter considering how many producer threads
852 are currently working */
853 if ((--adapter->num_threads) == 0) {
854 /* This is the last thread */
855 u32 crb_producer = adapter->cmd_producer;
856 writel(crb_producer,
857 NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_PRODUCER_OFFSET));
858 wmb();
859 adapter->total_threads = 0;
860 } else {
861 u32 crb_producer = 0;
862 crb_producer =
863 readl(NETXEN_CRB_NORMALIZE
864 (adapter, CRB_CMD_PRODUCER_OFFSET));
865 if (crb_producer == local_producer) {
866 crb_producer = get_index_range(crb_producer,
867 max_tx_desc_count,
868 no_of_desc);
869 writel(crb_producer,
870 NETXEN_CRB_NORMALIZE(adapter,
871 CRB_CMD_PRODUCER_OFFSET));
872 wmb();
873 }
874 }
875
876 port->stats.xmitfinished++;
877 spin_unlock_bh(&adapter->tx_lock);
878
879 netdev->trans_start = jiffies;
880
881 DPRINTK(INFO, "wrote CMD producer %x to phantom\n", producer);
882
883 DPRINTK(INFO, "Done. Send\n");
884 return NETDEV_TX_OK;
885}
886
887static void netxen_watchdog(unsigned long v)
888{
889 struct netxen_adapter *adapter = (struct netxen_adapter *)v;
890 schedule_work(&adapter->watchdog_task);
891}
892
893static void netxen_tx_timeout(struct net_device *netdev)
894{
895 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
896 struct netxen_adapter *adapter = port->adapter;
897
898 schedule_work(&adapter->tx_timeout_task);
899}
900
901static void netxen_tx_timeout_task(struct net_device *netdev)
902{
903 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
904 unsigned long flags;
905
906 printk(KERN_ERR "%s %s: transmit timeout, resetting.\n",
907 netxen_nic_driver_name, netdev->name);
908
909 spin_lock_irqsave(&port->adapter->lock, flags);
910 netxen_nic_close(netdev);
911 netxen_nic_open(netdev);
912 spin_unlock_irqrestore(&port->adapter->lock, flags);
913 netdev->trans_start = jiffies;
914 netif_wake_queue(netdev);
915}
916
917static int
918netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
919{
920 u32 ret = 0;
921
922 DPRINTK(INFO, "Entered handle ISR\n");
923
924 adapter->stats.ints++;
925
926 if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
927 int count = 0;
928 u32 mask;
929 netxen_nic_disable_int(adapter);
930 /* Window = 0 or 1 */
931 do {
932 writel(0xffffffff, (void __iomem *)
933 (adapter->ahw.pci_base + ISR_INT_TARGET_STATUS));
934 mask = readl((void __iomem *)
935 (adapter->ahw.pci_base + ISR_INT_VECTOR));
936 } while (((mask & 0x80) != 0) && (++count < 32));
937 if ((mask & 0x80) != 0)
938 printk("Could not disable interrupt completely\n");
939
940 }
941 adapter->stats.hostints++;
942
943 if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
944 if (netif_rx_schedule_prep(netdev)) {
945 /*
946 * Interrupts are already disabled.
947 */
948 __netif_rx_schedule(netdev);
949 } else {
950 static unsigned int intcount = 0;
951 if ((++intcount & 0xfff) == 0xfff)
952 printk(KERN_ERR
953 "%s: %s interrupt %d while in poll\n",
954 netxen_nic_driver_name, netdev->name,
955 intcount);
956 }
957 ret = 1;
958 }
959
960 if (ret == 0) {
961 netxen_nic_enable_int(adapter);
962 }
963
964 return ret;
965}
966
967/*
968 * netxen_intr - Interrupt Handler
969 * @irq: interrupt number
970 * data points to adapter stucture (which may be handling more than 1 port
971 */
972irqreturn_t netxen_intr(int irq, void *data, struct pt_regs * regs)
973{
974 struct netxen_adapter *adapter;
975 struct netxen_port *port;
976 struct net_device *netdev;
977 int i;
978
979 if (unlikely(!irq)) {
980 return IRQ_NONE; /* Not our interrupt */
981 }
982
983 adapter = (struct netxen_adapter *)data;
984 for (i = 0; i < adapter->ahw.max_ports; i++) {
985 port = adapter->port[i];
986 netdev = port->netdev;
987
988 /* process our status queue (for all 4 ports) */
989 netxen_handle_int(adapter, netdev);
990 }
991
992 return IRQ_HANDLED;
993}
994
995static int netxen_nic_poll(struct net_device *netdev, int *budget)
996{
997 struct netxen_port *port = (struct netxen_port *)netdev_priv(netdev);
998 struct netxen_adapter *adapter = port->adapter;
999 int work_to_do = min(*budget, netdev->quota);
1000 int done = 1;
1001 int ctx;
1002 int this_work_done;
1003
1004 DPRINTK(INFO, "polling for %d descriptors\n", *budget);
1005 port->stats.polled++;
1006
1007 adapter->work_done = 0;
1008 for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
1009 /*
1010 * Fairness issue. This will give undue weight to the
1011 * receive context 0.
1012 */
1013
1014 /*
1015 * To avoid starvation, we give each of our receivers,
1016 * a fraction of the quota. Sometimes, it might happen that we
1017 * have enough quota to process every packet, but since all the
1018 * packets are on one context, it gets only half of the quota,
1019 * and ends up not processing it.
1020 */
1021 this_work_done = netxen_process_rcv_ring(adapter, ctx,
1022 work_to_do /
1023 MAX_RCV_CTX);
1024 adapter->work_done += this_work_done;
1025 }
1026
1027 netdev->quota -= adapter->work_done;
1028 *budget -= adapter->work_done;
1029
1030 if (adapter->work_done >= work_to_do
1031 && netxen_nic_rx_has_work(adapter) != 0)
1032 done = 0;
1033
1034 netxen_process_cmd_ring((unsigned long)adapter);
1035
1036 DPRINTK(INFO, "new work_done: %d work_to_do: %d\n",
1037 adapter->work_done, work_to_do);
1038 if (done) {
1039 netif_rx_complete(netdev);
1040 netxen_nic_enable_int(adapter);
1041 }
1042
1043 return (done ? 0 : 1);
1044}
1045
1046#ifdef CONFIG_NET_POLL_CONTROLLER
1047static void netxen_nic_poll_controller(struct net_device *netdev)
1048{
1049 struct netxen_port *port = netdev_priv(netdev);
1050 struct netxen_adapter *adapter = port->adapter;
1051 disable_irq(adapter->irq);
1052 netxen_intr(adapter->irq, adapter, NULL);
1053 enable_irq(adapter->irq);
1054}
1055#endif
1056/*
1057 * netxen_nic_ioctl () We provide the tcl/phanmon support through these
1058 * ioctls.
1059 */
1060static int
1061netxen_nic_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1062{
1063 int err = 0;
1064 struct netxen_port *port = netdev_priv(netdev);
1065 struct netxen_adapter *adapter = port->adapter;
1066
1067 DPRINTK(INFO, "doing ioctl for %s\n", netdev->name);
1068 switch (cmd) {
1069 case NETXEN_NIC_CMD:
1070 err = netxen_nic_do_ioctl(adapter, (void *)ifr->ifr_data, port);
1071 break;
1072
1073 case NETXEN_NIC_NAME:
1074 DPRINTK(INFO, "ioctl cmd for NetXen\n");
1075 if (ifr->ifr_data) {
1076 put_user(port->portnum, (u16 __user *) ifr->ifr_data);
1077 }
1078 break;
1079
1080 default:
1081 DPRINTK(INFO, "ioctl cmd %x not supported\n", cmd);
1082 err = -EOPNOTSUPP;
1083 break;
1084 }
1085
1086 return err;
1087}
1088
1089static struct pci_driver netxen_driver = {
1090 .name = netxen_nic_driver_name,
1091 .id_table = netxen_pci_tbl,
1092 .probe = netxen_nic_probe,
1093 .remove = __devexit_p(netxen_nic_remove)
1094};
1095
1096/* Driver Registration on NetXen card */
1097
1098static int __init netxen_init_module(void)
1099{
1100 printk(KERN_INFO "%s \n", netxen_nic_driver_string);
1101
1102 return pci_module_init(&netxen_driver);
1103}
1104
1105module_init(netxen_init_module);
1106
1107static void __exit netxen_exit_module(void)
1108{
1109 /*
1110 * Wait for some time to allow the dma to drain, if any.
1111 */
1112 mdelay(5);
1113 pci_unregister_driver(&netxen_driver);
1114}
1115
1116module_exit(netxen_exit_module);
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