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x86/amd-iommu: Add function to complete a tlb flush
[linux/fpc-iii.git] / drivers / infiniband / hw / amso1100 / c2.c
blobc61fd2b4a5563c62d18393a479f29bd72c3eae8e
1 /*
2 * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
3 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/pci.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/inetdevice.h>
39 #include <linux/delay.h>
40 #include <linux/ethtool.h>
41 #include <linux/mii.h>
42 #include <linux/if_vlan.h>
43 #include <linux/crc32.h>
44 #include <linux/in.h>
45 #include <linux/ip.h>
46 #include <linux/tcp.h>
47 #include <linux/init.h>
48 #include <linux/dma-mapping.h>
49
50 #include <asm/io.h>
51 #include <asm/irq.h>
52 #include <asm/byteorder.h>
53
54 #include <rdma/ib_smi.h>
55 #include "c2.h"
56 #include "c2_provider.h"
57
58 MODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>");
59 MODULE_DESCRIPTION("Ammasso AMSO1100 Low-level iWARP Driver");
60 MODULE_LICENSE("Dual BSD/GPL");
61 MODULE_VERSION(DRV_VERSION);
62
63 static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK
64 | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN;
65
66 static int debug = -1; /* defaults above */
67 module_param(debug, int, 0);
68 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
69
70 static int c2_up(struct net_device *netdev);
71 static int c2_down(struct net_device *netdev);
72 static int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
73 static void c2_tx_interrupt(struct net_device *netdev);
74 static void c2_rx_interrupt(struct net_device *netdev);
75 static irqreturn_t c2_interrupt(int irq, void *dev_id);
76 static void c2_tx_timeout(struct net_device *netdev);
77 static int c2_change_mtu(struct net_device *netdev, int new_mtu);
78 static void c2_reset(struct c2_port *c2_port);
79
80 static struct pci_device_id c2_pci_table[] = {
81 { PCI_DEVICE(0x18b8, 0xb001) },
82 { 0 }
83 };
84
85 MODULE_DEVICE_TABLE(pci, c2_pci_table);
86
87 static void c2_print_macaddr(struct net_device *netdev)
88 {
89 pr_debug("%s: MAC %pM, IRQ %u\n", netdev->name, netdev->dev_addr, netdev->irq);
90 }
91
92 static void c2_set_rxbufsize(struct c2_port *c2_port)
93 {
94 struct net_device *netdev = c2_port->netdev;
95
96 if (netdev->mtu > RX_BUF_SIZE)
97 c2_port->rx_buf_size =
98 netdev->mtu + ETH_HLEN + sizeof(struct c2_rxp_hdr) +
99 NET_IP_ALIGN;
100 else
101 c2_port->rx_buf_size = sizeof(struct c2_rxp_hdr) + RX_BUF_SIZE;
102 }
103
104 /*
105 * Allocate TX ring elements and chain them together.
106 * One-to-one association of adapter descriptors with ring elements.
107 */
108 static int c2_tx_ring_alloc(struct c2_ring *tx_ring, void *vaddr,
109 dma_addr_t base, void __iomem * mmio_txp_ring)
110 {
111 struct c2_tx_desc *tx_desc;
112 struct c2_txp_desc __iomem *txp_desc;
113 struct c2_element *elem;
114 int i;
115
116 tx_ring->start = kmalloc(sizeof(*elem) * tx_ring->count, GFP_KERNEL);
117 if (!tx_ring->start)
118 return -ENOMEM;
119
120 elem = tx_ring->start;
121 tx_desc = vaddr;
122 txp_desc = mmio_txp_ring;
123 for (i = 0; i < tx_ring->count; i++, elem++, tx_desc++, txp_desc++) {
124 tx_desc->len = 0;
125 tx_desc->status = 0;
126
127 /* Set TXP_HTXD_UNINIT */
128 __raw_writeq((__force u64) cpu_to_be64(0x1122334455667788ULL),
129 (void __iomem *) txp_desc + C2_TXP_ADDR);
130 __raw_writew(0, (void __iomem *) txp_desc + C2_TXP_LEN);
131 __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_UNINIT),
132 (void __iomem *) txp_desc + C2_TXP_FLAGS);
133
134 elem->skb = NULL;
135 elem->ht_desc = tx_desc;
136 elem->hw_desc = txp_desc;
137
138 if (i == tx_ring->count - 1) {
139 elem->next = tx_ring->start;
140 tx_desc->next_offset = base;
141 } else {
142 elem->next = elem + 1;
143 tx_desc->next_offset =
144 base + (i + 1) * sizeof(*tx_desc);
145 }
146 }
147
148 tx_ring->to_use = tx_ring->to_clean = tx_ring->start;
149
150 return 0;
151 }
152
153 /*
154 * Allocate RX ring elements and chain them together.
155 * One-to-one association of adapter descriptors with ring elements.
156 */
157 static int c2_rx_ring_alloc(struct c2_ring *rx_ring, void *vaddr,
158 dma_addr_t base, void __iomem * mmio_rxp_ring)
159 {
160 struct c2_rx_desc *rx_desc;
161 struct c2_rxp_desc __iomem *rxp_desc;
162 struct c2_element *elem;
163 int i;
164
165 rx_ring->start = kmalloc(sizeof(*elem) * rx_ring->count, GFP_KERNEL);
166 if (!rx_ring->start)
167 return -ENOMEM;
168
169 elem = rx_ring->start;
170 rx_desc = vaddr;
171 rxp_desc = mmio_rxp_ring;
172 for (i = 0; i < rx_ring->count; i++, elem++, rx_desc++, rxp_desc++) {
173 rx_desc->len = 0;
174 rx_desc->status = 0;
175
176 /* Set RXP_HRXD_UNINIT */
177 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_OK),
178 (void __iomem *) rxp_desc + C2_RXP_STATUS);
179 __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_COUNT);
180 __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_LEN);
181 __raw_writeq((__force u64) cpu_to_be64(0x99aabbccddeeffULL),
182 (void __iomem *) rxp_desc + C2_RXP_ADDR);
183 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_UNINIT),
184 (void __iomem *) rxp_desc + C2_RXP_FLAGS);
185
186 elem->skb = NULL;
187 elem->ht_desc = rx_desc;
188 elem->hw_desc = rxp_desc;
189
190 if (i == rx_ring->count - 1) {
191 elem->next = rx_ring->start;
192 rx_desc->next_offset = base;
193 } else {
194 elem->next = elem + 1;
195 rx_desc->next_offset =
196 base + (i + 1) * sizeof(*rx_desc);
197 }
198 }
199
200 rx_ring->to_use = rx_ring->to_clean = rx_ring->start;
201
202 return 0;
203 }
204
205 /* Setup buffer for receiving */
206 static inline int c2_rx_alloc(struct c2_port *c2_port, struct c2_element *elem)
207 {
208 struct c2_dev *c2dev = c2_port->c2dev;
209 struct c2_rx_desc *rx_desc = elem->ht_desc;
210 struct sk_buff *skb;
211 dma_addr_t mapaddr;
212 u32 maplen;
213 struct c2_rxp_hdr *rxp_hdr;
214
215 skb = dev_alloc_skb(c2_port->rx_buf_size);
216 if (unlikely(!skb)) {
217 pr_debug("%s: out of memory for receive\n",
218 c2_port->netdev->name);
219 return -ENOMEM;
220 }
221
222 /* Zero out the rxp hdr in the sk_buff */
223 memset(skb->data, 0, sizeof(*rxp_hdr));
224
225 skb->dev = c2_port->netdev;
226
227 maplen = c2_port->rx_buf_size;
228 mapaddr =
229 pci_map_single(c2dev->pcidev, skb->data, maplen,
230 PCI_DMA_FROMDEVICE);
231
232 /* Set the sk_buff RXP_header to RXP_HRXD_READY */
233 rxp_hdr = (struct c2_rxp_hdr *) skb->data;
234 rxp_hdr->flags = RXP_HRXD_READY;
235
236 __raw_writew(0, elem->hw_desc + C2_RXP_STATUS);
237 __raw_writew((__force u16) cpu_to_be16((u16) maplen - sizeof(*rxp_hdr)),
238 elem->hw_desc + C2_RXP_LEN);
239 __raw_writeq((__force u64) cpu_to_be64(mapaddr), elem->hw_desc + C2_RXP_ADDR);
240 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY),
241 elem->hw_desc + C2_RXP_FLAGS);
242
243 elem->skb = skb;
244 elem->mapaddr = mapaddr;
245 elem->maplen = maplen;
246 rx_desc->len = maplen;
247
248 return 0;
249 }
250
251 /*
252 * Allocate buffers for the Rx ring
253 * For receive: rx_ring.to_clean is next received frame
254 */
255 static int c2_rx_fill(struct c2_port *c2_port)
256 {
257 struct c2_ring *rx_ring = &c2_port->rx_ring;
258 struct c2_element *elem;
259 int ret = 0;
260
261 elem = rx_ring->start;
262 do {
263 if (c2_rx_alloc(c2_port, elem)) {
264 ret = 1;
265 break;
266 }
267 } while ((elem = elem->next) != rx_ring->start);
268
269 rx_ring->to_clean = rx_ring->start;
270 return ret;
271 }
272
273 /* Free all buffers in RX ring, assumes receiver stopped */
274 static void c2_rx_clean(struct c2_port *c2_port)
275 {
276 struct c2_dev *c2dev = c2_port->c2dev;
277 struct c2_ring *rx_ring = &c2_port->rx_ring;
278 struct c2_element *elem;
279 struct c2_rx_desc *rx_desc;
280
281 elem = rx_ring->start;
282 do {
283 rx_desc = elem->ht_desc;
284 rx_desc->len = 0;
285
286 __raw_writew(0, elem->hw_desc + C2_RXP_STATUS);
287 __raw_writew(0, elem->hw_desc + C2_RXP_COUNT);
288 __raw_writew(0, elem->hw_desc + C2_RXP_LEN);
289 __raw_writeq((__force u64) cpu_to_be64(0x99aabbccddeeffULL),
290 elem->hw_desc + C2_RXP_ADDR);
291 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_UNINIT),
292 elem->hw_desc + C2_RXP_FLAGS);
293
294 if (elem->skb) {
295 pci_unmap_single(c2dev->pcidev, elem->mapaddr,
296 elem->maplen, PCI_DMA_FROMDEVICE);
297 dev_kfree_skb(elem->skb);
298 elem->skb = NULL;
299 }
300 } while ((elem = elem->next) != rx_ring->start);
301 }
302
303 static inline int c2_tx_free(struct c2_dev *c2dev, struct c2_element *elem)
304 {
305 struct c2_tx_desc *tx_desc = elem->ht_desc;
306
307 tx_desc->len = 0;
308
309 pci_unmap_single(c2dev->pcidev, elem->mapaddr, elem->maplen,
310 PCI_DMA_TODEVICE);
311
312 if (elem->skb) {
313 dev_kfree_skb_any(elem->skb);
314 elem->skb = NULL;
315 }
316
317 return 0;
318 }
319
320 /* Free all buffers in TX ring, assumes transmitter stopped */
321 static void c2_tx_clean(struct c2_port *c2_port)
322 {
323 struct c2_ring *tx_ring = &c2_port->tx_ring;
324 struct c2_element *elem;
325 struct c2_txp_desc txp_htxd;
326 int retry;
327 unsigned long flags;
328
329 spin_lock_irqsave(&c2_port->tx_lock, flags);
330
331 elem = tx_ring->start;
332
333 do {
334 retry = 0;
335 do {
336 txp_htxd.flags =
337 readw(elem->hw_desc + C2_TXP_FLAGS);
338
339 if (txp_htxd.flags == TXP_HTXD_READY) {
340 retry = 1;
341 __raw_writew(0,
342 elem->hw_desc + C2_TXP_LEN);
343 __raw_writeq(0,
344 elem->hw_desc + C2_TXP_ADDR);
345 __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_DONE),
346 elem->hw_desc + C2_TXP_FLAGS);
347 c2_port->netdev->stats.tx_dropped++;
348 break;
349 } else {
350 __raw_writew(0,
351 elem->hw_desc + C2_TXP_LEN);
352 __raw_writeq((__force u64) cpu_to_be64(0x1122334455667788ULL),
353 elem->hw_desc + C2_TXP_ADDR);
354 __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_UNINIT),
355 elem->hw_desc + C2_TXP_FLAGS);
356 }
357
358 c2_tx_free(c2_port->c2dev, elem);
359
360 } while ((elem = elem->next) != tx_ring->start);
361 } while (retry);
362
363 c2_port->tx_avail = c2_port->tx_ring.count - 1;
364 c2_port->c2dev->cur_tx = tx_ring->to_use - tx_ring->start;
365
366 if (c2_port->tx_avail > MAX_SKB_FRAGS + 1)
367 netif_wake_queue(c2_port->netdev);
368
369 spin_unlock_irqrestore(&c2_port->tx_lock, flags);
370 }
371
372 /*
373 * Process transmit descriptors marked 'DONE' by the firmware,
374 * freeing up their unneeded sk_buffs.
375 */
376 static void c2_tx_interrupt(struct net_device *netdev)
377 {
378 struct c2_port *c2_port = netdev_priv(netdev);
379 struct c2_dev *c2dev = c2_port->c2dev;
380 struct c2_ring *tx_ring = &c2_port->tx_ring;
381 struct c2_element *elem;
382 struct c2_txp_desc txp_htxd;
383
384 spin_lock(&c2_port->tx_lock);
385
386 for (elem = tx_ring->to_clean; elem != tx_ring->to_use;
387 elem = elem->next) {
388 txp_htxd.flags =
389 be16_to_cpu((__force __be16) readw(elem->hw_desc + C2_TXP_FLAGS));
390
391 if (txp_htxd.flags != TXP_HTXD_DONE)
392 break;
393
394 if (netif_msg_tx_done(c2_port)) {
395 /* PCI reads are expensive in fast path */
396 txp_htxd.len =
397 be16_to_cpu((__force __be16) readw(elem->hw_desc + C2_TXP_LEN));
398 pr_debug("%s: tx done slot %3Zu status 0x%x len "
399 "%5u bytes\n",
400 netdev->name, elem - tx_ring->start,
401 txp_htxd.flags, txp_htxd.len);
402 }
403
404 c2_tx_free(c2dev, elem);
405 ++(c2_port->tx_avail);
406 }
407
408 tx_ring->to_clean = elem;
409
410 if (netif_queue_stopped(netdev)
411 && c2_port->tx_avail > MAX_SKB_FRAGS + 1)
412 netif_wake_queue(netdev);
413
414 spin_unlock(&c2_port->tx_lock);
415 }
416
417 static void c2_rx_error(struct c2_port *c2_port, struct c2_element *elem)
418 {
419 struct c2_rx_desc *rx_desc = elem->ht_desc;
420 struct c2_rxp_hdr *rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data;
421
422 if (rxp_hdr->status != RXP_HRXD_OK ||
423 rxp_hdr->len > (rx_desc->len - sizeof(*rxp_hdr))) {
424 pr_debug("BAD RXP_HRXD\n");
425 pr_debug(" rx_desc : %p\n", rx_desc);
426 pr_debug(" index : %Zu\n",
427 elem - c2_port->rx_ring.start);
428 pr_debug(" len : %u\n", rx_desc->len);
429 pr_debug(" rxp_hdr : %p [PA %p]\n", rxp_hdr,
430 (void *) __pa((unsigned long) rxp_hdr));
431 pr_debug(" flags : 0x%x\n", rxp_hdr->flags);
432 pr_debug(" status: 0x%x\n", rxp_hdr->status);
433 pr_debug(" len : %u\n", rxp_hdr->len);
434 pr_debug(" rsvd : 0x%x\n", rxp_hdr->rsvd);
435 }
436
437 /* Setup the skb for reuse since we're dropping this pkt */
438 elem->skb->data = elem->skb->head;
439 skb_reset_tail_pointer(elem->skb);
440
441 /* Zero out the rxp hdr in the sk_buff */
442 memset(elem->skb->data, 0, sizeof(*rxp_hdr));
443
444 /* Write the descriptor to the adapter's rx ring */
445 __raw_writew(0, elem->hw_desc + C2_RXP_STATUS);
446 __raw_writew(0, elem->hw_desc + C2_RXP_COUNT);
447 __raw_writew((__force u16) cpu_to_be16((u16) elem->maplen - sizeof(*rxp_hdr)),
448 elem->hw_desc + C2_RXP_LEN);
449 __raw_writeq((__force u64) cpu_to_be64(elem->mapaddr),
450 elem->hw_desc + C2_RXP_ADDR);
451 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY),
452 elem->hw_desc + C2_RXP_FLAGS);
453
454 pr_debug("packet dropped\n");
455 c2_port->netdev->stats.rx_dropped++;
456 }
457
458 static void c2_rx_interrupt(struct net_device *netdev)
459 {
460 struct c2_port *c2_port = netdev_priv(netdev);
461 struct c2_dev *c2dev = c2_port->c2dev;
462 struct c2_ring *rx_ring = &c2_port->rx_ring;
463 struct c2_element *elem;
464 struct c2_rx_desc *rx_desc;
465 struct c2_rxp_hdr *rxp_hdr;
466 struct sk_buff *skb;
467 dma_addr_t mapaddr;
468 u32 maplen, buflen;
469 unsigned long flags;
470
471 spin_lock_irqsave(&c2dev->lock, flags);
472
473 /* Begin where we left off */
474 rx_ring->to_clean = rx_ring->start + c2dev->cur_rx;
475
476 for (elem = rx_ring->to_clean; elem->next != rx_ring->to_clean;
477 elem = elem->next) {
478 rx_desc = elem->ht_desc;
479 mapaddr = elem->mapaddr;
480 maplen = elem->maplen;
481 skb = elem->skb;
482 rxp_hdr = (struct c2_rxp_hdr *) skb->data;
483
484 if (rxp_hdr->flags != RXP_HRXD_DONE)
485 break;
486 buflen = rxp_hdr->len;
487
488 /* Sanity check the RXP header */
489 if (rxp_hdr->status != RXP_HRXD_OK ||
490 buflen > (rx_desc->len - sizeof(*rxp_hdr))) {
491 c2_rx_error(c2_port, elem);
492 continue;
493 }
494
495 /*
496 * Allocate and map a new skb for replenishing the host
497 * RX desc
498 */
499 if (c2_rx_alloc(c2_port, elem)) {
500 c2_rx_error(c2_port, elem);
501 continue;
502 }
503
504 /* Unmap the old skb */
505 pci_unmap_single(c2dev->pcidev, mapaddr, maplen,
506 PCI_DMA_FROMDEVICE);
507
508 prefetch(skb->data);
509
510 /*
511 * Skip past the leading 8 bytes comprising of the
512 * "struct c2_rxp_hdr", prepended by the adapter
513 * to the usual Ethernet header ("struct ethhdr"),
514 * to the start of the raw Ethernet packet.
515 *
516 * Fix up the various fields in the sk_buff before
517 * passing it up to netif_rx(). The transfer size
518 * (in bytes) specified by the adapter len field of
519 * the "struct rxp_hdr_t" does NOT include the
520 * "sizeof(struct c2_rxp_hdr)".
521 */
522 skb->data += sizeof(*rxp_hdr);
523 skb_set_tail_pointer(skb, buflen);
524 skb->len = buflen;
525 skb->protocol = eth_type_trans(skb, netdev);
526
527 netif_rx(skb);
528
529 netdev->stats.rx_packets++;
530 netdev->stats.rx_bytes += buflen;
531 }
532
533 /* Save where we left off */
534 rx_ring->to_clean = elem;
535 c2dev->cur_rx = elem - rx_ring->start;
536 C2_SET_CUR_RX(c2dev, c2dev->cur_rx);
537
538 spin_unlock_irqrestore(&c2dev->lock, flags);
539 }
540
541 /*
542 * Handle netisr0 TX & RX interrupts.
543 */
544 static irqreturn_t c2_interrupt(int irq, void *dev_id)
545 {
546 unsigned int netisr0, dmaisr;
547 int handled = 0;
548 struct c2_dev *c2dev = (struct c2_dev *) dev_id;
549
550 /* Process CCILNET interrupts */
551 netisr0 = readl(c2dev->regs + C2_NISR0);
552 if (netisr0) {
553
554 /*
555 * There is an issue with the firmware that always
556 * provides the status of RX for both TX & RX
557 * interrupts. So process both queues here.
558 */
559 c2_rx_interrupt(c2dev->netdev);
560 c2_tx_interrupt(c2dev->netdev);
561
562 /* Clear the interrupt */
563 writel(netisr0, c2dev->regs + C2_NISR0);
564 handled++;
565 }
566
567 /* Process RNIC interrupts */
568 dmaisr = readl(c2dev->regs + C2_DISR);
569 if (dmaisr) {
570 writel(dmaisr, c2dev->regs + C2_DISR);
571 c2_rnic_interrupt(c2dev);
572 handled++;
573 }
574
575 if (handled) {
576 return IRQ_HANDLED;
577 } else {
578 return IRQ_NONE;
579 }
580 }
581
582 static int c2_up(struct net_device *netdev)
583 {
584 struct c2_port *c2_port = netdev_priv(netdev);
585 struct c2_dev *c2dev = c2_port->c2dev;
586 struct c2_element *elem;
587 struct c2_rxp_hdr *rxp_hdr;
588 struct in_device *in_dev;
589 size_t rx_size, tx_size;
590 int ret, i;
591 unsigned int netimr0;
592
593 if (netif_msg_ifup(c2_port))
594 pr_debug("%s: enabling interface\n", netdev->name);
595
596 /* Set the Rx buffer size based on MTU */
597 c2_set_rxbufsize(c2_port);
598
599 /* Allocate DMA'able memory for Tx/Rx host descriptor rings */
600 rx_size = c2_port->rx_ring.count * sizeof(struct c2_rx_desc);
601 tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc);
602
603 c2_port->mem_size = tx_size + rx_size;
604 c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size,
605 &c2_port->dma);
606 if (c2_port->mem == NULL) {
607 pr_debug("Unable to allocate memory for "
608 "host descriptor rings\n");
609 return -ENOMEM;
610 }
611
612 memset(c2_port->mem, 0, c2_port->mem_size);
613
614 /* Create the Rx host descriptor ring */
615 if ((ret =
616 c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma,
617 c2dev->mmio_rxp_ring))) {
618 pr_debug("Unable to create RX ring\n");
619 goto bail0;
620 }
621
622 /* Allocate Rx buffers for the host descriptor ring */
623 if (c2_rx_fill(c2_port)) {
624 pr_debug("Unable to fill RX ring\n");
625 goto bail1;
626 }
627
628 /* Create the Tx host descriptor ring */
629 if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size,
630 c2_port->dma + rx_size,
631 c2dev->mmio_txp_ring))) {
632 pr_debug("Unable to create TX ring\n");
633 goto bail1;
634 }
635
636 /* Set the TX pointer to where we left off */
637 c2_port->tx_avail = c2_port->tx_ring.count - 1;
638 c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean =
639 c2_port->tx_ring.start + c2dev->cur_tx;
640
641 /* missing: Initialize MAC */
642
643 BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean);
644
645 /* Reset the adapter, ensures the driver is in sync with the RXP */
646 c2_reset(c2_port);
647
648 /* Reset the READY bit in the sk_buff RXP headers & adapter HRXDQ */
649 for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count;
650 i++, elem++) {
651 rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data;
652 rxp_hdr->flags = 0;
653 __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY),
654 elem->hw_desc + C2_RXP_FLAGS);
655 }
656
657 /* Enable network packets */
658 netif_start_queue(netdev);
659
660 /* Enable IRQ */
661 writel(0, c2dev->regs + C2_IDIS);
662 netimr0 = readl(c2dev->regs + C2_NIMR0);
663 netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT);
664 writel(netimr0, c2dev->regs + C2_NIMR0);
665
666 /* Tell the stack to ignore arp requests for ipaddrs bound to
667 * other interfaces. This is needed to prevent the host stack
668 * from responding to arp requests to the ipaddr bound on the
669 * rdma interface.
670 */
671 in_dev = in_dev_get(netdev);
672 IN_DEV_CONF_SET(in_dev, ARP_IGNORE, 1);
673 in_dev_put(in_dev);
674
675 return 0;
676
677 bail1:
678 c2_rx_clean(c2_port);
679 kfree(c2_port->rx_ring.start);
680
681 bail0:
682 pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
683 c2_port->dma);
684
685 return ret;
686 }
687
688 static int c2_down(struct net_device *netdev)
689 {
690 struct c2_port *c2_port = netdev_priv(netdev);
691 struct c2_dev *c2dev = c2_port->c2dev;
692
693 if (netif_msg_ifdown(c2_port))
694 pr_debug("%s: disabling interface\n",
695 netdev->name);
696
697 /* Wait for all the queued packets to get sent */
698 c2_tx_interrupt(netdev);
699
700 /* Disable network packets */
701 netif_stop_queue(netdev);
702
703 /* Disable IRQs by clearing the interrupt mask */
704 writel(1, c2dev->regs + C2_IDIS);
705 writel(0, c2dev->regs + C2_NIMR0);
706
707 /* missing: Stop transmitter */
708
709 /* missing: Stop receiver */
710
711 /* Reset the adapter, ensures the driver is in sync with the RXP */
712 c2_reset(c2_port);
713
714 /* missing: Turn off LEDs here */
715
716 /* Free all buffers in the host descriptor rings */
717 c2_tx_clean(c2_port);
718 c2_rx_clean(c2_port);
719
720 /* Free the host descriptor rings */
721 kfree(c2_port->rx_ring.start);
722 kfree(c2_port->tx_ring.start);
723 pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem,
724 c2_port->dma);
725
726 return 0;
727 }
728
729 static void c2_reset(struct c2_port *c2_port)
730 {
731 struct c2_dev *c2dev = c2_port->c2dev;
732 unsigned int cur_rx = c2dev->cur_rx;
733
734 /* Tell the hardware to quiesce */
735 C2_SET_CUR_RX(c2dev, cur_rx | C2_PCI_HRX_QUI);
736
737 /*
738 * The hardware will reset the C2_PCI_HRX_QUI bit once
739 * the RXP is quiesced. Wait 2 seconds for this.
740 */
741 ssleep(2);
742
743 cur_rx = C2_GET_CUR_RX(c2dev);
744
745 if (cur_rx & C2_PCI_HRX_QUI)
746 pr_debug("c2_reset: failed to quiesce the hardware!\n");
747
748 cur_rx &= ~C2_PCI_HRX_QUI;
749
750 c2dev->cur_rx = cur_rx;
751
752 pr_debug("Current RX: %u\n", c2dev->cur_rx);
753 }
754
755 static int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
756 {
757 struct c2_port *c2_port = netdev_priv(netdev);
758 struct c2_dev *c2dev = c2_port->c2dev;
759 struct c2_ring *tx_ring = &c2_port->tx_ring;
760 struct c2_element *elem;
761 dma_addr_t mapaddr;
762 u32 maplen;
763 unsigned long flags;
764 unsigned int i;
765
766 spin_lock_irqsave(&c2_port->tx_lock, flags);
767
768 if (unlikely(c2_port->tx_avail < (skb_shinfo(skb)->nr_frags + 1))) {
769 netif_stop_queue(netdev);
770 spin_unlock_irqrestore(&c2_port->tx_lock, flags);
771
772 pr_debug("%s: Tx ring full when queue awake!\n",
773 netdev->name);
774 return NETDEV_TX_BUSY;
775 }
776
777 maplen = skb_headlen(skb);
778 mapaddr =
779 pci_map_single(c2dev->pcidev, skb->data, maplen, PCI_DMA_TODEVICE);
780
781 elem = tx_ring->to_use;
782 elem->skb = skb;
783 elem->mapaddr = mapaddr;
784 elem->maplen = maplen;
785
786 /* Tell HW to xmit */
787 __raw_writeq((__force u64) cpu_to_be64(mapaddr),
788 elem->hw_desc + C2_TXP_ADDR);
789 __raw_writew((__force u16) cpu_to_be16(maplen),
790 elem->hw_desc + C2_TXP_LEN);
791 __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_READY),
792 elem->hw_desc + C2_TXP_FLAGS);
793
794 netdev->stats.tx_packets++;
795 netdev->stats.tx_bytes += maplen;
796
797 /* Loop thru additional data fragments and queue them */
798 if (skb_shinfo(skb)->nr_frags) {
799 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
800 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
801 maplen = frag->size;
802 mapaddr =
803 pci_map_page(c2dev->pcidev, frag->page,
804 frag->page_offset, maplen,
805 PCI_DMA_TODEVICE);
806
807 elem = elem->next;
808 elem->skb = NULL;
809 elem->mapaddr = mapaddr;
810 elem->maplen = maplen;
811
812 /* Tell HW to xmit */
813 __raw_writeq((__force u64) cpu_to_be64(mapaddr),
814 elem->hw_desc + C2_TXP_ADDR);
815 __raw_writew((__force u16) cpu_to_be16(maplen),
816 elem->hw_desc + C2_TXP_LEN);
817 __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_READY),
818 elem->hw_desc + C2_TXP_FLAGS);
819
820 netdev->stats.tx_packets++;
821 netdev->stats.tx_bytes += maplen;
822 }
823 }
824
825 tx_ring->to_use = elem->next;
826 c2_port->tx_avail -= (skb_shinfo(skb)->nr_frags + 1);
827
828 if (c2_port->tx_avail <= MAX_SKB_FRAGS + 1) {
829 netif_stop_queue(netdev);
830 if (netif_msg_tx_queued(c2_port))
831 pr_debug("%s: transmit queue full\n",
832 netdev->name);
833 }
834
835 spin_unlock_irqrestore(&c2_port->tx_lock, flags);
836
837 netdev->trans_start = jiffies;
838
839 return NETDEV_TX_OK;
840 }
841
842 static void c2_tx_timeout(struct net_device *netdev)
843 {
844 struct c2_port *c2_port = netdev_priv(netdev);
845
846 if (netif_msg_timer(c2_port))
847 pr_debug("%s: tx timeout\n", netdev->name);
848
849 c2_tx_clean(c2_port);
850 }
851
852 static int c2_change_mtu(struct net_device *netdev, int new_mtu)
853 {
854 int ret = 0;
855
856 if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
857 return -EINVAL;
858
859 netdev->mtu = new_mtu;
860
861 if (netif_running(netdev)) {
862 c2_down(netdev);
863
864 c2_up(netdev);
865 }
866
867 return ret;
868 }
869
870 static const struct net_device_ops c2_netdev = {
871 .ndo_open = c2_up,
872 .ndo_stop = c2_down,
873 .ndo_start_xmit = c2_xmit_frame,
874 .ndo_tx_timeout = c2_tx_timeout,
875 .ndo_change_mtu = c2_change_mtu,
876 .ndo_set_mac_address = eth_mac_addr,
877 .ndo_validate_addr = eth_validate_addr,
878 };
879
880 /* Initialize network device */
881 static struct net_device *c2_devinit(struct c2_dev *c2dev,
882 void __iomem * mmio_addr)
883 {
884 struct c2_port *c2_port = NULL;
885 struct net_device *netdev = alloc_etherdev(sizeof(*c2_port));
886
887 if (!netdev) {
888 pr_debug("c2_port etherdev alloc failed");
889 return NULL;
890 }
891
892 SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev);
893
894 netdev->netdev_ops = &c2_netdev;
895 netdev->watchdog_timeo = C2_TX_TIMEOUT;
896 netdev->irq = c2dev->pcidev->irq;
897
898 c2_port = netdev_priv(netdev);
899 c2_port->netdev = netdev;
900 c2_port->c2dev = c2dev;
901 c2_port->msg_enable = netif_msg_init(debug, default_msg);
902 c2_port->tx_ring.count = C2_NUM_TX_DESC;
903 c2_port->rx_ring.count = C2_NUM_RX_DESC;
904
905 spin_lock_init(&c2_port->tx_lock);
906
907 /* Copy our 48-bit ethernet hardware address */
908 memcpy_fromio(netdev->dev_addr, mmio_addr + C2_REGS_ENADDR, 6);
909
910 /* Validate the MAC address */
911 if (!is_valid_ether_addr(netdev->dev_addr)) {
912 pr_debug("Invalid MAC Address\n");
913 c2_print_macaddr(netdev);
914 free_netdev(netdev);
915 return NULL;
916 }
917
918 c2dev->netdev = netdev;
919
920 return netdev;
921 }
922
923 static int __devinit c2_probe(struct pci_dev *pcidev,
924 const struct pci_device_id *ent)
925 {
926 int ret = 0, i;
927 unsigned long reg0_start, reg0_flags, reg0_len;
928 unsigned long reg2_start, reg2_flags, reg2_len;
929 unsigned long reg4_start, reg4_flags, reg4_len;
930 unsigned kva_map_size;
931 struct net_device *netdev = NULL;
932 struct c2_dev *c2dev = NULL;
933 void __iomem *mmio_regs = NULL;
934
935 printk(KERN_INFO PFX "AMSO1100 Gigabit Ethernet driver v%s loaded\n",
936 DRV_VERSION);
937
938 /* Enable PCI device */
939 ret = pci_enable_device(pcidev);
940 if (ret) {
941 printk(KERN_ERR PFX "%s: Unable to enable PCI device\n",
942 pci_name(pcidev));
943 goto bail0;
944 }
945
946 reg0_start = pci_resource_start(pcidev, BAR_0);
947 reg0_len = pci_resource_len(pcidev, BAR_0);
948 reg0_flags = pci_resource_flags(pcidev, BAR_0);
949
950 reg2_start = pci_resource_start(pcidev, BAR_2);
951 reg2_len = pci_resource_len(pcidev, BAR_2);
952 reg2_flags = pci_resource_flags(pcidev, BAR_2);
953
954 reg4_start = pci_resource_start(pcidev, BAR_4);
955 reg4_len = pci_resource_len(pcidev, BAR_4);
956 reg4_flags = pci_resource_flags(pcidev, BAR_4);
957
958 pr_debug("BAR0 size = 0x%lX bytes\n", reg0_len);
959 pr_debug("BAR2 size = 0x%lX bytes\n", reg2_len);
960 pr_debug("BAR4 size = 0x%lX bytes\n", reg4_len);
961
962 /* Make sure PCI base addr are MMIO */
963 if (!(reg0_flags & IORESOURCE_MEM) ||
964 !(reg2_flags & IORESOURCE_MEM) || !(reg4_flags & IORESOURCE_MEM)) {
965 printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
966 ret = -ENODEV;
967 goto bail1;
968 }
969
970 /* Check for weird/broken PCI region reporting */
971 if ((reg0_len < C2_REG0_SIZE) ||
972 (reg2_len < C2_REG2_SIZE) || (reg4_len < C2_REG4_SIZE)) {
973 printk(KERN_ERR PFX "Invalid PCI region sizes\n");
974 ret = -ENODEV;
975 goto bail1;
976 }
977
978 /* Reserve PCI I/O and memory resources */
979 ret = pci_request_regions(pcidev, DRV_NAME);
980 if (ret) {
981 printk(KERN_ERR PFX "%s: Unable to request regions\n",
982 pci_name(pcidev));
983 goto bail1;
984 }
985
986 if ((sizeof(dma_addr_t) > 4)) {
987 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64));
988 if (ret < 0) {
989 printk(KERN_ERR PFX "64b DMA configuration failed\n");
990 goto bail2;
991 }
992 } else {
993 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
994 if (ret < 0) {
995 printk(KERN_ERR PFX "32b DMA configuration failed\n");
996 goto bail2;
997 }
998 }
999
1000 /* Enables bus-mastering on the device */
1001 pci_set_master(pcidev);
1002
1003 /* Remap the adapter PCI registers in BAR4 */
1004 mmio_regs = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET,
1005 sizeof(struct c2_adapter_pci_regs));
1006 if (!mmio_regs) {
1007 printk(KERN_ERR PFX
1008 "Unable to remap adapter PCI registers in BAR4\n");
1009 ret = -EIO;
1010 goto bail2;
1011 }
1012
1013 /* Validate PCI regs magic */
1014 for (i = 0; i < sizeof(c2_magic); i++) {
1015 if (c2_magic[i] != readb(mmio_regs + C2_REGS_MAGIC + i)) {
1016 printk(KERN_ERR PFX "Downlevel Firmware boot loader "
1017 "[%d/%Zd: got 0x%x, exp 0x%x]. Use the cc_flash "
1018 "utility to update your boot loader\n",
1019 i + 1, sizeof(c2_magic),
1020 readb(mmio_regs + C2_REGS_MAGIC + i),
1021 c2_magic[i]);
1022 printk(KERN_ERR PFX "Adapter not claimed\n");
1023 iounmap(mmio_regs);
1024 ret = -EIO;
1025 goto bail2;
1026 }
1027 }
1028
1029 /* Validate the adapter version */
1030 if (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_VERS)) != C2_VERSION) {
1031 printk(KERN_ERR PFX "Version mismatch "
1032 "[fw=%u, c2=%u], Adapter not claimed\n",
1033 be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_VERS)),
1034 C2_VERSION);
1035 ret = -EINVAL;
1036 iounmap(mmio_regs);
1037 goto bail2;
1038 }
1039
1040 /* Validate the adapter IVN */
1041 if (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_IVN)) != C2_IVN) {
1042 printk(KERN_ERR PFX "Downlevel FIrmware level. You should be using "
1043 "the OpenIB device support kit. "
1044 "[fw=0x%x, c2=0x%x], Adapter not claimed\n",
1045 be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_IVN)),
1046 C2_IVN);
1047 ret = -EINVAL;
1048 iounmap(mmio_regs);
1049 goto bail2;
1050 }
1051
1052 /* Allocate hardware structure */
1053 c2dev = (struct c2_dev *) ib_alloc_device(sizeof(*c2dev));
1054 if (!c2dev) {
1055 printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n",
1056 pci_name(pcidev));
1057 ret = -ENOMEM;
1058 iounmap(mmio_regs);
1059 goto bail2;
1060 }
1061
1062 memset(c2dev, 0, sizeof(*c2dev));
1063 spin_lock_init(&c2dev->lock);
1064 c2dev->pcidev = pcidev;
1065 c2dev->cur_tx = 0;
1066
1067 /* Get the last RX index */
1068 c2dev->cur_rx =
1069 (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_HRX_CUR)) -
1070 0xffffc000) / sizeof(struct c2_rxp_desc);
1071
1072 /* Request an interrupt line for the driver */
1073 ret = request_irq(pcidev->irq, c2_interrupt, IRQF_SHARED, DRV_NAME, c2dev);
1074 if (ret) {
1075 printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
1076 pci_name(pcidev), pcidev->irq);
1077 iounmap(mmio_regs);
1078 goto bail3;
1079 }
1080
1081 /* Set driver specific data */
1082 pci_set_drvdata(pcidev, c2dev);
1083
1084 /* Initialize network device */
1085 if ((netdev = c2_devinit(c2dev, mmio_regs)) == NULL) {
1086 iounmap(mmio_regs);
1087 goto bail4;
1088 }
1089
1090 /* Save off the actual size prior to unmapping mmio_regs */
1091 kva_map_size = be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_PCI_WINSIZE));
1092
1093 /* Unmap the adapter PCI registers in BAR4 */
1094 iounmap(mmio_regs);
1095
1096 /* Register network device */
1097 ret = register_netdev(netdev);
1098 if (ret) {
1099 printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n",
1100 ret);
1101 goto bail5;
1102 }
1103
1104 /* Disable network packets */
1105 netif_stop_queue(netdev);
1106
1107 /* Remap the adapter HRXDQ PA space to kernel VA space */
1108 c2dev->mmio_rxp_ring = ioremap_nocache(reg4_start + C2_RXP_HRXDQ_OFFSET,
1109 C2_RXP_HRXDQ_SIZE);
1110 if (!c2dev->mmio_rxp_ring) {
1111 printk(KERN_ERR PFX "Unable to remap MMIO HRXDQ region\n");
1112 ret = -EIO;
1113 goto bail6;
1114 }
1115
1116 /* Remap the adapter HTXDQ PA space to kernel VA space */
1117 c2dev->mmio_txp_ring = ioremap_nocache(reg4_start + C2_TXP_HTXDQ_OFFSET,
1118 C2_TXP_HTXDQ_SIZE);
1119 if (!c2dev->mmio_txp_ring) {
1120 printk(KERN_ERR PFX "Unable to remap MMIO HTXDQ region\n");
1121 ret = -EIO;
1122 goto bail7;
1123 }
1124
1125 /* Save off the current RX index in the last 4 bytes of the TXP Ring */
1126 C2_SET_CUR_RX(c2dev, c2dev->cur_rx);
1127
1128 /* Remap the PCI registers in adapter BAR0 to kernel VA space */
1129 c2dev->regs = ioremap_nocache(reg0_start, reg0_len);
1130 if (!c2dev->regs) {
1131 printk(KERN_ERR PFX "Unable to remap BAR0\n");
1132 ret = -EIO;
1133 goto bail8;
1134 }
1135
1136 /* Remap the PCI registers in adapter BAR4 to kernel VA space */
1137 c2dev->pa = reg4_start + C2_PCI_REGS_OFFSET;
1138 c2dev->kva = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET,
1139 kva_map_size);
1140 if (!c2dev->kva) {
1141 printk(KERN_ERR PFX "Unable to remap BAR4\n");
1142 ret = -EIO;
1143 goto bail9;
1144 }
1145
1146 /* Print out the MAC address */
1147 c2_print_macaddr(netdev);
1148
1149 ret = c2_rnic_init(c2dev);
1150 if (ret) {
1151 printk(KERN_ERR PFX "c2_rnic_init failed: %d\n", ret);
1152 goto bail10;
1153 }
1154
1155 if (c2_register_device(c2dev))
1156 goto bail10;
1157
1158 return 0;
1159
1160 bail10:
1161 iounmap(c2dev->kva);
1162
1163 bail9:
1164 iounmap(c2dev->regs);
1165
1166 bail8:
1167 iounmap(c2dev->mmio_txp_ring);
1168
1169 bail7:
1170 iounmap(c2dev->mmio_rxp_ring);
1171
1172 bail6:
1173 unregister_netdev(netdev);
1174
1175 bail5:
1176 free_netdev(netdev);
1177
1178 bail4:
1179 free_irq(pcidev->irq, c2dev);
1180
1181 bail3:
1182 ib_dealloc_device(&c2dev->ibdev);
1183
1184 bail2:
1185 pci_release_regions(pcidev);
1186
1187 bail1:
1188 pci_disable_device(pcidev);
1189
1190 bail0:
1191 return ret;
1192 }
1193
1194 static void __devexit c2_remove(struct pci_dev *pcidev)
1195 {
1196 struct c2_dev *c2dev = pci_get_drvdata(pcidev);
1197 struct net_device *netdev = c2dev->netdev;
1198
1199 /* Unregister with OpenIB */
1200 c2_unregister_device(c2dev);
1201
1202 /* Clean up the RNIC resources */
1203 c2_rnic_term(c2dev);
1204
1205 /* Remove network device from the kernel */
1206 unregister_netdev(netdev);
1207
1208 /* Free network device */
1209 free_netdev(netdev);
1210
1211 /* Free the interrupt line */
1212 free_irq(pcidev->irq, c2dev);
1213
1214 /* missing: Turn LEDs off here */
1215
1216 /* Unmap adapter PA space */
1217 iounmap(c2dev->kva);
1218 iounmap(c2dev->regs);
1219 iounmap(c2dev->mmio_txp_ring);
1220 iounmap(c2dev->mmio_rxp_ring);
1221
1222 /* Free the hardware structure */
1223 ib_dealloc_device(&c2dev->ibdev);
1224
1225 /* Release reserved PCI I/O and memory resources */
1226 pci_release_regions(pcidev);
1227
1228 /* Disable PCI device */
1229 pci_disable_device(pcidev);
1230
1231 /* Clear driver specific data */
1232 pci_set_drvdata(pcidev, NULL);
1233 }
1234
1235 static struct pci_driver c2_pci_driver = {
1236 .name = DRV_NAME,
1237 .id_table = c2_pci_table,
1238 .probe = c2_probe,
1239 .remove = __devexit_p(c2_remove),
1240 };
1241
1242 static int __init c2_init_module(void)
1243 {
1244 return pci_register_driver(&c2_pci_driver);
1245 }
1246
1247 static void __exit c2_exit_module(void)
1248 {
1249 pci_unregister_driver(&c2_pci_driver);
1250 }
1251
1252 module_init(c2_init_module);
1253 module_exit(c2_exit_module);
Linux with added FPC-III support