]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - drivers/net/ethernet/rocker/rocker_main.c
projects / mirror_ubuntu-hirsute-kernel.git / blob
? search:


6213827e3956486a47b8e924a04f410de0dca79c
[mirror_ubuntu-hirsute-kernel.git] / drivers / net / ethernet / rocker / rocker_main.c
1 /*
2 * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
3 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
4 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/interrupt.h>
16 #include <linux/sched.h>
17 #include <linux/wait.h>
18 #include <linux/spinlock.h>
19 #include <linux/sort.h>
20 #include <linux/random.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/socket.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/if_bridge.h>
29 #include <linux/bitops.h>
30 #include <linux/ctype.h>
31 #include <linux/workqueue.h>
32 #include <net/switchdev.h>
33 #include <net/rtnetlink.h>
34 #include <net/netevent.h>
35 #include <net/arp.h>
36 #include <net/fib_rules.h>
37 #include <net/fib_notifier.h>
38 #include <linux/io-64-nonatomic-lo-hi.h>
39 #include <generated/utsrelease.h>
40
41 #include "rocker_hw.h"
42 #include "rocker.h"
43 #include "rocker_tlv.h"
44
45 static const char rocker_driver_name[] = "rocker";
46
47 static const struct pci_device_id rocker_pci_id_table[] = {
48 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
49 {0, }
50 };
51
52 struct rocker_wait {
53 wait_queue_head_t wait;
54 bool done;
55 bool nowait;
56 };
57
58 static void rocker_wait_reset(struct rocker_wait *wait)
59 {
60 wait->done = false;
61 wait->nowait = false;
62 }
63
64 static void rocker_wait_init(struct rocker_wait *wait)
65 {
66 init_waitqueue_head(&wait->wait);
67 rocker_wait_reset(wait);
68 }
69
70 static struct rocker_wait *rocker_wait_create(void)
71 {
72 struct rocker_wait *wait;
73
74 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
75 if (!wait)
76 return NULL;
77 return wait;
78 }
79
80 static void rocker_wait_destroy(struct rocker_wait *wait)
81 {
82 kfree(wait);
83 }
84
85 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
86 unsigned long timeout)
87 {
88 wait_event_timeout(wait->wait, wait->done, HZ / 10);
89 if (!wait->done)
90 return false;
91 return true;
92 }
93
94 static void rocker_wait_wake_up(struct rocker_wait *wait)
95 {
96 wait->done = true;
97 wake_up(&wait->wait);
98 }
99
100 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
101 {
102 return rocker->msix_entries[vector].vector;
103 }
104
105 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
106 {
107 return rocker_msix_vector(rocker_port->rocker,
108 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
109 }
110
111 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
112 {
113 return rocker_msix_vector(rocker_port->rocker,
114 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
115 }
116
117 #define rocker_write32(rocker, reg, val) \
118 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119 #define rocker_read32(rocker, reg) \
120 readl((rocker)->hw_addr + (ROCKER_ ## reg))
121 #define rocker_write64(rocker, reg, val) \
122 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
123 #define rocker_read64(rocker, reg) \
124 readq((rocker)->hw_addr + (ROCKER_ ## reg))
125
126 /*****************************
127 * HW basic testing functions
128 *****************************/
129
130 static int rocker_reg_test(const struct rocker *rocker)
131 {
132 const struct pci_dev *pdev = rocker->pdev;
133 u64 test_reg;
134 u64 rnd;
135
136 rnd = prandom_u32();
137 rnd >>= 1;
138 rocker_write32(rocker, TEST_REG, rnd);
139 test_reg = rocker_read32(rocker, TEST_REG);
140 if (test_reg != rnd * 2) {
141 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
142 test_reg, rnd * 2);
143 return -EIO;
144 }
145
146 rnd = prandom_u32();
147 rnd <<= 31;
148 rnd |= prandom_u32();
149 rocker_write64(rocker, TEST_REG64, rnd);
150 test_reg = rocker_read64(rocker, TEST_REG64);
151 if (test_reg != rnd * 2) {
152 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
153 test_reg, rnd * 2);
154 return -EIO;
155 }
156
157 return 0;
158 }
159
160 static int rocker_dma_test_one(const struct rocker *rocker,
161 struct rocker_wait *wait, u32 test_type,
162 dma_addr_t dma_handle, const unsigned char *buf,
163 const unsigned char *expect, size_t size)
164 {
165 const struct pci_dev *pdev = rocker->pdev;
166 int i;
167
168 rocker_wait_reset(wait);
169 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
170
171 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
172 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
173 return -EIO;
174 }
175
176 for (i = 0; i < size; i++) {
177 if (buf[i] != expect[i]) {
178 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
179 buf[i], i, expect[i]);
180 return -EIO;
181 }
182 }
183 return 0;
184 }
185
186 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
187 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
188
189 static int rocker_dma_test_offset(const struct rocker *rocker,
190 struct rocker_wait *wait, int offset)
191 {
192 struct pci_dev *pdev = rocker->pdev;
193 unsigned char *alloc;
194 unsigned char *buf;
195 unsigned char *expect;
196 dma_addr_t dma_handle;
197 int i;
198 int err;
199
200 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
201 GFP_KERNEL | GFP_DMA);
202 if (!alloc)
203 return -ENOMEM;
204 buf = alloc + offset;
205 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
206
207 dma_handle = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
208 PCI_DMA_BIDIRECTIONAL);
209 if (pci_dma_mapping_error(pdev, dma_handle)) {
210 err = -EIO;
211 goto free_alloc;
212 }
213
214 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
215 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
216
217 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
218 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
219 dma_handle, buf, expect,
220 ROCKER_TEST_DMA_BUF_SIZE);
221 if (err)
222 goto unmap;
223
224 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
225 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
226 dma_handle, buf, expect,
227 ROCKER_TEST_DMA_BUF_SIZE);
228 if (err)
229 goto unmap;
230
231 prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
232 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
233 expect[i] = ~buf[i];
234 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
235 dma_handle, buf, expect,
236 ROCKER_TEST_DMA_BUF_SIZE);
237 if (err)
238 goto unmap;
239
240 unmap:
241 pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
242 PCI_DMA_BIDIRECTIONAL);
243 free_alloc:
244 kfree(alloc);
245
246 return err;
247 }
248
249 static int rocker_dma_test(const struct rocker *rocker,
250 struct rocker_wait *wait)
251 {
252 int i;
253 int err;
254
255 for (i = 0; i < 8; i++) {
256 err = rocker_dma_test_offset(rocker, wait, i);
257 if (err)
258 return err;
259 }
260 return 0;
261 }
262
263 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
264 {
265 struct rocker_wait *wait = dev_id;
266
267 rocker_wait_wake_up(wait);
268
269 return IRQ_HANDLED;
270 }
271
272 static int rocker_basic_hw_test(const struct rocker *rocker)
273 {
274 const struct pci_dev *pdev = rocker->pdev;
275 struct rocker_wait wait;
276 int err;
277
278 err = rocker_reg_test(rocker);
279 if (err) {
280 dev_err(&pdev->dev, "reg test failed\n");
281 return err;
282 }
283
284 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
285 rocker_test_irq_handler, 0,
286 rocker_driver_name, &wait);
287 if (err) {
288 dev_err(&pdev->dev, "cannot assign test irq\n");
289 return err;
290 }
291
292 rocker_wait_init(&wait);
293 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
294
295 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
296 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
297 err = -EIO;
298 goto free_irq;
299 }
300
301 err = rocker_dma_test(rocker, &wait);
302 if (err)
303 dev_err(&pdev->dev, "dma test failed\n");
304
305 free_irq:
306 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
307 return err;
308 }
309
310 /******************************************
311 * DMA rings and descriptors manipulations
312 ******************************************/
313
314 static u32 __pos_inc(u32 pos, size_t limit)
315 {
316 return ++pos == limit ? 0 : pos;
317 }
318
319 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
320 {
321 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
322
323 switch (err) {
324 case ROCKER_OK:
325 return 0;
326 case -ROCKER_ENOENT:
327 return -ENOENT;
328 case -ROCKER_ENXIO:
329 return -ENXIO;
330 case -ROCKER_ENOMEM:
331 return -ENOMEM;
332 case -ROCKER_EEXIST:
333 return -EEXIST;
334 case -ROCKER_EINVAL:
335 return -EINVAL;
336 case -ROCKER_EMSGSIZE:
337 return -EMSGSIZE;
338 case -ROCKER_ENOTSUP:
339 return -EOPNOTSUPP;
340 case -ROCKER_ENOBUFS:
341 return -ENOBUFS;
342 }
343
344 return -EINVAL;
345 }
346
347 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
348 {
349 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
350 }
351
352 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
353 {
354 u32 comp_err = desc_info->desc->comp_err;
355
356 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
357 }
358
359 static void *
360 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
361 {
362 return (void *)(uintptr_t)desc_info->desc->cookie;
363 }
364
365 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
366 void *ptr)
367 {
368 desc_info->desc->cookie = (uintptr_t) ptr;
369 }
370
371 static struct rocker_desc_info *
372 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
373 {
374 struct rocker_desc_info *desc_info;
375 u32 head = __pos_inc(info->head, info->size);
376
377 desc_info = &info->desc_info[info->head];
378 if (head == info->tail)
379 return NULL; /* ring full */
380 desc_info->tlv_size = 0;
381 return desc_info;
382 }
383
384 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
385 {
386 desc_info->desc->buf_size = desc_info->data_size;
387 desc_info->desc->tlv_size = desc_info->tlv_size;
388 }
389
390 static void rocker_desc_head_set(const struct rocker *rocker,
391 struct rocker_dma_ring_info *info,
392 const struct rocker_desc_info *desc_info)
393 {
394 u32 head = __pos_inc(info->head, info->size);
395
396 BUG_ON(head == info->tail);
397 rocker_desc_commit(desc_info);
398 info->head = head;
399 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
400 }
401
402 static struct rocker_desc_info *
403 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
404 {
405 struct rocker_desc_info *desc_info;
406
407 if (info->tail == info->head)
408 return NULL; /* nothing to be done between head and tail */
409 desc_info = &info->desc_info[info->tail];
410 if (!rocker_desc_gen(desc_info))
411 return NULL; /* gen bit not set, desc is not ready yet */
412 info->tail = __pos_inc(info->tail, info->size);
413 desc_info->tlv_size = desc_info->desc->tlv_size;
414 return desc_info;
415 }
416
417 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
418 const struct rocker_dma_ring_info *info,
419 u32 credits)
420 {
421 if (credits)
422 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
423 }
424
425 static unsigned long rocker_dma_ring_size_fix(size_t size)
426 {
427 return max(ROCKER_DMA_SIZE_MIN,
428 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
429 }
430
431 static int rocker_dma_ring_create(const struct rocker *rocker,
432 unsigned int type,
433 size_t size,
434 struct rocker_dma_ring_info *info)
435 {
436 int i;
437
438 BUG_ON(size != rocker_dma_ring_size_fix(size));
439 info->size = size;
440 info->type = type;
441 info->head = 0;
442 info->tail = 0;
443 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
444 GFP_KERNEL);
445 if (!info->desc_info)
446 return -ENOMEM;
447
448 info->desc = pci_alloc_consistent(rocker->pdev,
449 info->size * sizeof(*info->desc),
450 &info->mapaddr);
451 if (!info->desc) {
452 kfree(info->desc_info);
453 return -ENOMEM;
454 }
455
456 for (i = 0; i < info->size; i++)
457 info->desc_info[i].desc = &info->desc[i];
458
459 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
460 ROCKER_DMA_DESC_CTRL_RESET);
461 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
462 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
463
464 return 0;
465 }
466
467 static void rocker_dma_ring_destroy(const struct rocker *rocker,
468 const struct rocker_dma_ring_info *info)
469 {
470 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
471
472 pci_free_consistent(rocker->pdev,
473 info->size * sizeof(struct rocker_desc),
474 info->desc, info->mapaddr);
475 kfree(info->desc_info);
476 }
477
478 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
479 struct rocker_dma_ring_info *info)
480 {
481 int i;
482
483 BUG_ON(info->head || info->tail);
484
485 /* When ring is consumer, we need to advance head for each desc.
486 * That tells hw that the desc is ready to be used by it.
487 */
488 for (i = 0; i < info->size - 1; i++)
489 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
490 rocker_desc_commit(&info->desc_info[i]);
491 }
492
493 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
494 const struct rocker_dma_ring_info *info,
495 int direction, size_t buf_size)
496 {
497 struct pci_dev *pdev = rocker->pdev;
498 int i;
499 int err;
500
501 for (i = 0; i < info->size; i++) {
502 struct rocker_desc_info *desc_info = &info->desc_info[i];
503 struct rocker_desc *desc = &info->desc[i];
504 dma_addr_t dma_handle;
505 char *buf;
506
507 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
508 if (!buf) {
509 err = -ENOMEM;
510 goto rollback;
511 }
512
513 dma_handle = pci_map_single(pdev, buf, buf_size, direction);
514 if (pci_dma_mapping_error(pdev, dma_handle)) {
515 kfree(buf);
516 err = -EIO;
517 goto rollback;
518 }
519
520 desc_info->data = buf;
521 desc_info->data_size = buf_size;
522 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
523
524 desc->buf_addr = dma_handle;
525 desc->buf_size = buf_size;
526 }
527 return 0;
528
529 rollback:
530 for (i--; i >= 0; i--) {
531 const struct rocker_desc_info *desc_info = &info->desc_info[i];
532
533 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
534 desc_info->data_size, direction);
535 kfree(desc_info->data);
536 }
537 return err;
538 }
539
540 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
541 const struct rocker_dma_ring_info *info,
542 int direction)
543 {
544 struct pci_dev *pdev = rocker->pdev;
545 int i;
546
547 for (i = 0; i < info->size; i++) {
548 const struct rocker_desc_info *desc_info = &info->desc_info[i];
549 struct rocker_desc *desc = &info->desc[i];
550
551 desc->buf_addr = 0;
552 desc->buf_size = 0;
553 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
554 desc_info->data_size, direction);
555 kfree(desc_info->data);
556 }
557 }
558
559 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
560 {
561 struct rocker_wait *wait;
562
563 wait = rocker_wait_create();
564 if (!wait)
565 return -ENOMEM;
566 rocker_desc_cookie_ptr_set(desc_info, wait);
567 return 0;
568 }
569
570 static void
571 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
572 {
573 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
574
575 rocker_wait_destroy(wait);
576 }
577
578 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
579 {
580 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
581 int i;
582 int err;
583
584 for (i = 0; i < cmd_ring->size; i++) {
585 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
586 if (err)
587 goto rollback;
588 }
589 return 0;
590
591 rollback:
592 for (i--; i >= 0; i--)
593 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
594 return err;
595 }
596
597 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
598 {
599 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
600 int i;
601
602 for (i = 0; i < cmd_ring->size; i++)
603 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
604 }
605
606 static int rocker_dma_rings_init(struct rocker *rocker)
607 {
608 const struct pci_dev *pdev = rocker->pdev;
609 int err;
610
611 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
612 ROCKER_DMA_CMD_DEFAULT_SIZE,
613 &rocker->cmd_ring);
614 if (err) {
615 dev_err(&pdev->dev, "failed to create command dma ring\n");
616 return err;
617 }
618
619 spin_lock_init(&rocker->cmd_ring_lock);
620
621 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
622 PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
623 if (err) {
624 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
625 goto err_dma_cmd_ring_bufs_alloc;
626 }
627
628 err = rocker_dma_cmd_ring_waits_alloc(rocker);
629 if (err) {
630 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
631 goto err_dma_cmd_ring_waits_alloc;
632 }
633
634 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
635 ROCKER_DMA_EVENT_DEFAULT_SIZE,
636 &rocker->event_ring);
637 if (err) {
638 dev_err(&pdev->dev, "failed to create event dma ring\n");
639 goto err_dma_event_ring_create;
640 }
641
642 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
643 PCI_DMA_FROMDEVICE, PAGE_SIZE);
644 if (err) {
645 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
646 goto err_dma_event_ring_bufs_alloc;
647 }
648 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
649 return 0;
650
651 err_dma_event_ring_bufs_alloc:
652 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
653 err_dma_event_ring_create:
654 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
655 PCI_DMA_BIDIRECTIONAL);
656 err_dma_cmd_ring_waits_alloc:
657 rocker_dma_cmd_ring_waits_free(rocker);
658 err_dma_cmd_ring_bufs_alloc:
659 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
660 return err;
661 }
662
663 static void rocker_dma_rings_fini(struct rocker *rocker)
664 {
665 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
666 PCI_DMA_BIDIRECTIONAL);
667 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
668 rocker_dma_cmd_ring_waits_free(rocker);
669 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
670 PCI_DMA_BIDIRECTIONAL);
671 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
672 }
673
674 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
675 struct rocker_desc_info *desc_info,
676 struct sk_buff *skb, size_t buf_len)
677 {
678 const struct rocker *rocker = rocker_port->rocker;
679 struct pci_dev *pdev = rocker->pdev;
680 dma_addr_t dma_handle;
681
682 dma_handle = pci_map_single(pdev, skb->data, buf_len,
683 PCI_DMA_FROMDEVICE);
684 if (pci_dma_mapping_error(pdev, dma_handle))
685 return -EIO;
686 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
687 goto tlv_put_failure;
688 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
689 goto tlv_put_failure;
690 return 0;
691
692 tlv_put_failure:
693 pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
694 desc_info->tlv_size = 0;
695 return -EMSGSIZE;
696 }
697
698 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
699 {
700 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
701 }
702
703 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
704 struct rocker_desc_info *desc_info)
705 {
706 struct net_device *dev = rocker_port->dev;
707 struct sk_buff *skb;
708 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
709 int err;
710
711 /* Ensure that hw will see tlv_size zero in case of an error.
712 * That tells hw to use another descriptor.
713 */
714 rocker_desc_cookie_ptr_set(desc_info, NULL);
715 desc_info->tlv_size = 0;
716
717 skb = netdev_alloc_skb_ip_align(dev, buf_len);
718 if (!skb)
719 return -ENOMEM;
720 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
721 if (err) {
722 dev_kfree_skb_any(skb);
723 return err;
724 }
725 rocker_desc_cookie_ptr_set(desc_info, skb);
726 return 0;
727 }
728
729 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
730 const struct rocker_tlv **attrs)
731 {
732 struct pci_dev *pdev = rocker->pdev;
733 dma_addr_t dma_handle;
734 size_t len;
735
736 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
737 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
738 return;
739 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
740 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
741 pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
742 }
743
744 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
745 const struct rocker_desc_info *desc_info)
746 {
747 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
748 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
749
750 if (!skb)
751 return;
752 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
753 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
754 dev_kfree_skb_any(skb);
755 }
756
757 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
758 {
759 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
760 const struct rocker *rocker = rocker_port->rocker;
761 int i;
762 int err;
763
764 for (i = 0; i < rx_ring->size; i++) {
765 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
766 &rx_ring->desc_info[i]);
767 if (err)
768 goto rollback;
769 }
770 return 0;
771
772 rollback:
773 for (i--; i >= 0; i--)
774 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
775 return err;
776 }
777
778 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
779 {
780 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
781 const struct rocker *rocker = rocker_port->rocker;
782 int i;
783
784 for (i = 0; i < rx_ring->size; i++)
785 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
786 }
787
788 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
789 {
790 struct rocker *rocker = rocker_port->rocker;
791 int err;
792
793 err = rocker_dma_ring_create(rocker,
794 ROCKER_DMA_TX(rocker_port->port_number),
795 ROCKER_DMA_TX_DEFAULT_SIZE,
796 &rocker_port->tx_ring);
797 if (err) {
798 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
799 return err;
800 }
801
802 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
803 PCI_DMA_TODEVICE,
804 ROCKER_DMA_TX_DESC_SIZE);
805 if (err) {
806 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
807 goto err_dma_tx_ring_bufs_alloc;
808 }
809
810 err = rocker_dma_ring_create(rocker,
811 ROCKER_DMA_RX(rocker_port->port_number),
812 ROCKER_DMA_RX_DEFAULT_SIZE,
813 &rocker_port->rx_ring);
814 if (err) {
815 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
816 goto err_dma_rx_ring_create;
817 }
818
819 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
820 PCI_DMA_BIDIRECTIONAL,
821 ROCKER_DMA_RX_DESC_SIZE);
822 if (err) {
823 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
824 goto err_dma_rx_ring_bufs_alloc;
825 }
826
827 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
828 if (err) {
829 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
830 goto err_dma_rx_ring_skbs_alloc;
831 }
832 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
833
834 return 0;
835
836 err_dma_rx_ring_skbs_alloc:
837 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
838 PCI_DMA_BIDIRECTIONAL);
839 err_dma_rx_ring_bufs_alloc:
840 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
841 err_dma_rx_ring_create:
842 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
843 PCI_DMA_TODEVICE);
844 err_dma_tx_ring_bufs_alloc:
845 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
846 return err;
847 }
848
849 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
850 {
851 struct rocker *rocker = rocker_port->rocker;
852
853 rocker_dma_rx_ring_skbs_free(rocker_port);
854 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
855 PCI_DMA_BIDIRECTIONAL);
856 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
857 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
858 PCI_DMA_TODEVICE);
859 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
860 }
861
862 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
863 bool enable)
864 {
865 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
866
867 if (enable)
868 val |= 1ULL << rocker_port->pport;
869 else
870 val &= ~(1ULL << rocker_port->pport);
871 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
872 }
873
874 /********************************
875 * Interrupt handler and helpers
876 ********************************/
877
878 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
879 {
880 struct rocker *rocker = dev_id;
881 const struct rocker_desc_info *desc_info;
882 struct rocker_wait *wait;
883 u32 credits = 0;
884
885 spin_lock(&rocker->cmd_ring_lock);
886 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
887 wait = rocker_desc_cookie_ptr_get(desc_info);
888 if (wait->nowait) {
889 rocker_desc_gen_clear(desc_info);
890 } else {
891 rocker_wait_wake_up(wait);
892 }
893 credits++;
894 }
895 spin_unlock(&rocker->cmd_ring_lock);
896 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
897
898 return IRQ_HANDLED;
899 }
900
901 static void rocker_port_link_up(const struct rocker_port *rocker_port)
902 {
903 netif_carrier_on(rocker_port->dev);
904 netdev_info(rocker_port->dev, "Link is up\n");
905 }
906
907 static void rocker_port_link_down(const struct rocker_port *rocker_port)
908 {
909 netif_carrier_off(rocker_port->dev);
910 netdev_info(rocker_port->dev, "Link is down\n");
911 }
912
913 static int rocker_event_link_change(const struct rocker *rocker,
914 const struct rocker_tlv *info)
915 {
916 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
917 unsigned int port_number;
918 bool link_up;
919 struct rocker_port *rocker_port;
920
921 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
922 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
923 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
924 return -EIO;
925 port_number =
926 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
927 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
928
929 if (port_number >= rocker->port_count)
930 return -EINVAL;
931
932 rocker_port = rocker->ports[port_number];
933 if (netif_carrier_ok(rocker_port->dev) != link_up) {
934 if (link_up)
935 rocker_port_link_up(rocker_port);
936 else
937 rocker_port_link_down(rocker_port);
938 }
939
940 return 0;
941 }
942
943 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
944 const unsigned char *addr,
945 __be16 vlan_id);
946
947 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
948 const struct rocker_tlv *info)
949 {
950 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
951 unsigned int port_number;
952 struct rocker_port *rocker_port;
953 const unsigned char *addr;
954 __be16 vlan_id;
955
956 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
957 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
958 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
959 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
960 return -EIO;
961 port_number =
962 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
963 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
964 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
965
966 if (port_number >= rocker->port_count)
967 return -EINVAL;
968
969 rocker_port = rocker->ports[port_number];
970 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
971 }
972
973 static int rocker_event_process(const struct rocker *rocker,
974 const struct rocker_desc_info *desc_info)
975 {
976 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
977 const struct rocker_tlv *info;
978 u16 type;
979
980 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
981 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
982 !attrs[ROCKER_TLV_EVENT_INFO])
983 return -EIO;
984
985 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
986 info = attrs[ROCKER_TLV_EVENT_INFO];
987
988 switch (type) {
989 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
990 return rocker_event_link_change(rocker, info);
991 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
992 return rocker_event_mac_vlan_seen(rocker, info);
993 }
994
995 return -EOPNOTSUPP;
996 }
997
998 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
999 {
1000 struct rocker *rocker = dev_id;
1001 const struct pci_dev *pdev = rocker->pdev;
1002 const struct rocker_desc_info *desc_info;
1003 u32 credits = 0;
1004 int err;
1005
1006 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1007 err = rocker_desc_err(desc_info);
1008 if (err) {
1009 dev_err(&pdev->dev, "event desc received with err %d\n",
1010 err);
1011 } else {
1012 err = rocker_event_process(rocker, desc_info);
1013 if (err)
1014 dev_err(&pdev->dev, "event processing failed with err %d\n",
1015 err);
1016 }
1017 rocker_desc_gen_clear(desc_info);
1018 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1019 credits++;
1020 }
1021 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1022
1023 return IRQ_HANDLED;
1024 }
1025
1026 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1027 {
1028 struct rocker_port *rocker_port = dev_id;
1029
1030 napi_schedule(&rocker_port->napi_tx);
1031 return IRQ_HANDLED;
1032 }
1033
1034 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1035 {
1036 struct rocker_port *rocker_port = dev_id;
1037
1038 napi_schedule(&rocker_port->napi_rx);
1039 return IRQ_HANDLED;
1040 }
1041
1042 /********************
1043 * Command interface
1044 ********************/
1045
1046 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1047 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1048 rocker_cmd_proc_cb_t process, void *process_priv)
1049 {
1050 struct rocker *rocker = rocker_port->rocker;
1051 struct rocker_desc_info *desc_info;
1052 struct rocker_wait *wait;
1053 unsigned long lock_flags;
1054 int err;
1055
1056 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1057
1058 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1059 if (!desc_info) {
1060 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1061 return -EAGAIN;
1062 }
1063
1064 wait = rocker_desc_cookie_ptr_get(desc_info);
1065 rocker_wait_init(wait);
1066 wait->nowait = nowait;
1067
1068 err = prepare(rocker_port, desc_info, prepare_priv);
1069 if (err) {
1070 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1071 return err;
1072 }
1073
1074 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1075
1076 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1077
1078 if (nowait)
1079 return 0;
1080
1081 if (!rocker_wait_event_timeout(wait, HZ / 10))
1082 return -EIO;
1083
1084 err = rocker_desc_err(desc_info);
1085 if (err)
1086 return err;
1087
1088 if (process)
1089 err = process(rocker_port, desc_info, process_priv);
1090
1091 rocker_desc_gen_clear(desc_info);
1092 return err;
1093 }
1094
1095 static int
1096 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1097 struct rocker_desc_info *desc_info,
1098 void *priv)
1099 {
1100 struct rocker_tlv *cmd_info;
1101
1102 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1103 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1104 return -EMSGSIZE;
1105 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1106 if (!cmd_info)
1107 return -EMSGSIZE;
1108 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1109 rocker_port->pport))
1110 return -EMSGSIZE;
1111 rocker_tlv_nest_end(desc_info, cmd_info);
1112 return 0;
1113 }
1114
1115 static int
1116 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1117 const struct rocker_desc_info *desc_info,
1118 void *priv)
1119 {
1120 struct ethtool_link_ksettings *ecmd = priv;
1121 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1122 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1123 u32 speed;
1124 u8 duplex;
1125 u8 autoneg;
1126
1127 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1128 if (!attrs[ROCKER_TLV_CMD_INFO])
1129 return -EIO;
1130
1131 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1132 attrs[ROCKER_TLV_CMD_INFO]);
1133 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1134 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1135 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1136 return -EIO;
1137
1138 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1139 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1140 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1141
1142 ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1143 ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1144
1145 ecmd->base.phy_address = 0xff;
1146 ecmd->base.port = PORT_TP;
1147 ecmd->base.speed = speed;
1148 ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1149 ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1150
1151 return 0;
1152 }
1153
1154 static int
1155 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1156 const struct rocker_desc_info *desc_info,
1157 void *priv)
1158 {
1159 unsigned char *macaddr = priv;
1160 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1161 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1162 const struct rocker_tlv *attr;
1163
1164 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1165 if (!attrs[ROCKER_TLV_CMD_INFO])
1166 return -EIO;
1167
1168 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1169 attrs[ROCKER_TLV_CMD_INFO]);
1170 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1171 if (!attr)
1172 return -EIO;
1173
1174 if (rocker_tlv_len(attr) != ETH_ALEN)
1175 return -EINVAL;
1176
1177 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1178 return 0;
1179 }
1180
1181 static int
1182 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1183 const struct rocker_desc_info *desc_info,
1184 void *priv)
1185 {
1186 u8 *p_mode = priv;
1187 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1188 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1189 const struct rocker_tlv *attr;
1190
1191 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1192 if (!attrs[ROCKER_TLV_CMD_INFO])
1193 return -EIO;
1194
1195 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1196 attrs[ROCKER_TLV_CMD_INFO]);
1197 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1198 if (!attr)
1199 return -EIO;
1200
1201 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1202 return 0;
1203 }
1204
1205 struct port_name {
1206 char *buf;
1207 size_t len;
1208 };
1209
1210 static int
1211 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1212 const struct rocker_desc_info *desc_info,
1213 void *priv)
1214 {
1215 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1216 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1217 struct port_name *name = priv;
1218 const struct rocker_tlv *attr;
1219 size_t i, j, len;
1220 const char *str;
1221
1222 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1223 if (!attrs[ROCKER_TLV_CMD_INFO])
1224 return -EIO;
1225
1226 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1227 attrs[ROCKER_TLV_CMD_INFO]);
1228 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1229 if (!attr)
1230 return -EIO;
1231
1232 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1233 str = rocker_tlv_data(attr);
1234
1235 /* make sure name only contains alphanumeric characters */
1236 for (i = j = 0; i < len; ++i) {
1237 if (isalnum(str[i])) {
1238 name->buf[j] = str[i];
1239 j++;
1240 }
1241 }
1242
1243 if (j == 0)
1244 return -EIO;
1245
1246 name->buf[j] = '\0';
1247
1248 return 0;
1249 }
1250
1251 static int
1252 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1253 struct rocker_desc_info *desc_info,
1254 void *priv)
1255 {
1256 struct ethtool_link_ksettings *ecmd = priv;
1257 struct rocker_tlv *cmd_info;
1258
1259 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1260 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1261 return -EMSGSIZE;
1262 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1263 if (!cmd_info)
1264 return -EMSGSIZE;
1265 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1266 rocker_port->pport))
1267 return -EMSGSIZE;
1268 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1269 ecmd->base.speed))
1270 return -EMSGSIZE;
1271 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1272 ecmd->base.duplex))
1273 return -EMSGSIZE;
1274 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1275 ecmd->base.autoneg))
1276 return -EMSGSIZE;
1277 rocker_tlv_nest_end(desc_info, cmd_info);
1278 return 0;
1279 }
1280
1281 static int
1282 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1283 struct rocker_desc_info *desc_info,
1284 void *priv)
1285 {
1286 const unsigned char *macaddr = priv;
1287 struct rocker_tlv *cmd_info;
1288
1289 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1290 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1291 return -EMSGSIZE;
1292 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1293 if (!cmd_info)
1294 return -EMSGSIZE;
1295 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1296 rocker_port->pport))
1297 return -EMSGSIZE;
1298 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1299 ETH_ALEN, macaddr))
1300 return -EMSGSIZE;
1301 rocker_tlv_nest_end(desc_info, cmd_info);
1302 return 0;
1303 }
1304
1305 static int
1306 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1307 struct rocker_desc_info *desc_info,
1308 void *priv)
1309 {
1310 int mtu = *(int *)priv;
1311 struct rocker_tlv *cmd_info;
1312
1313 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1314 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1315 return -EMSGSIZE;
1316 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1317 if (!cmd_info)
1318 return -EMSGSIZE;
1319 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1320 rocker_port->pport))
1321 return -EMSGSIZE;
1322 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1323 mtu))
1324 return -EMSGSIZE;
1325 rocker_tlv_nest_end(desc_info, cmd_info);
1326 return 0;
1327 }
1328
1329 static int
1330 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1331 struct rocker_desc_info *desc_info,
1332 void *priv)
1333 {
1334 bool learning = *(bool *)priv;
1335 struct rocker_tlv *cmd_info;
1336
1337 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1338 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1339 return -EMSGSIZE;
1340 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1341 if (!cmd_info)
1342 return -EMSGSIZE;
1343 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1344 rocker_port->pport))
1345 return -EMSGSIZE;
1346 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1347 learning))
1348 return -EMSGSIZE;
1349 rocker_tlv_nest_end(desc_info, cmd_info);
1350 return 0;
1351 }
1352
1353 static int
1354 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1355 struct ethtool_link_ksettings *ecmd)
1356 {
1357 return rocker_cmd_exec(rocker_port, false,
1358 rocker_cmd_get_port_settings_prep, NULL,
1359 rocker_cmd_get_port_settings_ethtool_proc,
1360 ecmd);
1361 }
1362
1363 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1364 unsigned char *macaddr)
1365 {
1366 return rocker_cmd_exec(rocker_port, false,
1367 rocker_cmd_get_port_settings_prep, NULL,
1368 rocker_cmd_get_port_settings_macaddr_proc,
1369 macaddr);
1370 }
1371
1372 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1373 u8 *p_mode)
1374 {
1375 return rocker_cmd_exec(rocker_port, false,
1376 rocker_cmd_get_port_settings_prep, NULL,
1377 rocker_cmd_get_port_settings_mode_proc, p_mode);
1378 }
1379
1380 static int
1381 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1382 const struct ethtool_link_ksettings *ecmd)
1383 {
1384 struct ethtool_link_ksettings copy_ecmd;
1385
1386 memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1387
1388 return rocker_cmd_exec(rocker_port, false,
1389 rocker_cmd_set_port_settings_ethtool_prep,
1390 &copy_ecmd, NULL, NULL);
1391 }
1392
1393 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1394 unsigned char *macaddr)
1395 {
1396 return rocker_cmd_exec(rocker_port, false,
1397 rocker_cmd_set_port_settings_macaddr_prep,
1398 macaddr, NULL, NULL);
1399 }
1400
1401 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1402 int mtu)
1403 {
1404 return rocker_cmd_exec(rocker_port, false,
1405 rocker_cmd_set_port_settings_mtu_prep,
1406 &mtu, NULL, NULL);
1407 }
1408
1409 int rocker_port_set_learning(struct rocker_port *rocker_port,
1410 bool learning)
1411 {
1412 return rocker_cmd_exec(rocker_port, false,
1413 rocker_cmd_set_port_learning_prep,
1414 &learning, NULL, NULL);
1415 }
1416
1417 /**********************
1418 * Worlds manipulation
1419 **********************/
1420
1421 static struct rocker_world_ops *rocker_world_ops[] = {
1422 &rocker_ofdpa_ops,
1423 };
1424
1425 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1426
1427 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1428 {
1429 int i;
1430
1431 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1432 if (rocker_world_ops[i]->mode == mode)
1433 return rocker_world_ops[i];
1434 return NULL;
1435 }
1436
1437 static int rocker_world_init(struct rocker *rocker, u8 mode)
1438 {
1439 struct rocker_world_ops *wops;
1440 int err;
1441
1442 wops = rocker_world_ops_find(mode);
1443 if (!wops) {
1444 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1445 mode);
1446 return -EINVAL;
1447 }
1448 rocker->wops = wops;
1449 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1450 if (!rocker->wpriv)
1451 return -ENOMEM;
1452 if (!wops->init)
1453 return 0;
1454 err = wops->init(rocker);
1455 if (err)
1456 kfree(rocker->wpriv);
1457 return err;
1458 }
1459
1460 static void rocker_world_fini(struct rocker *rocker)
1461 {
1462 struct rocker_world_ops *wops = rocker->wops;
1463
1464 if (!wops || !wops->fini)
1465 return;
1466 wops->fini(rocker);
1467 kfree(rocker->wpriv);
1468 }
1469
1470 static int rocker_world_check_init(struct rocker_port *rocker_port)
1471 {
1472 struct rocker *rocker = rocker_port->rocker;
1473 u8 mode;
1474 int err;
1475
1476 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1477 if (err) {
1478 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1479 return err;
1480 }
1481 if (rocker->wops) {
1482 if (rocker->wops->mode != mode) {
1483 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1484 return -EINVAL;
1485 }
1486 return 0;
1487 }
1488 return rocker_world_init(rocker, mode);
1489 }
1490
1491 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1492 {
1493 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1494 int err;
1495
1496 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1497 if (!rocker_port->wpriv)
1498 return -ENOMEM;
1499 if (!wops->port_pre_init)
1500 return 0;
1501 err = wops->port_pre_init(rocker_port);
1502 if (err)
1503 kfree(rocker_port->wpriv);
1504 return 0;
1505 }
1506
1507 static int rocker_world_port_init(struct rocker_port *rocker_port)
1508 {
1509 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1510
1511 if (!wops->port_init)
1512 return 0;
1513 return wops->port_init(rocker_port);
1514 }
1515
1516 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1517 {
1518 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1519
1520 if (!wops->port_fini)
1521 return;
1522 wops->port_fini(rocker_port);
1523 }
1524
1525 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1526 {
1527 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1528
1529 if (!wops->port_post_fini)
1530 return;
1531 wops->port_post_fini(rocker_port);
1532 kfree(rocker_port->wpriv);
1533 }
1534
1535 static int rocker_world_port_open(struct rocker_port *rocker_port)
1536 {
1537 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1538
1539 if (!wops->port_open)
1540 return 0;
1541 return wops->port_open(rocker_port);
1542 }
1543
1544 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1545 {
1546 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1547
1548 if (!wops->port_stop)
1549 return;
1550 wops->port_stop(rocker_port);
1551 }
1552
1553 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1554 u8 state,
1555 struct switchdev_trans *trans)
1556 {
1557 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1558
1559 if (!wops->port_attr_stp_state_set)
1560 return -EOPNOTSUPP;
1561
1562 if (switchdev_trans_ph_prepare(trans))
1563 return 0;
1564
1565 return wops->port_attr_stp_state_set(rocker_port, state);
1566 }
1567
1568 static int
1569 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1570 unsigned long brport_flags,
1571 struct switchdev_trans *trans)
1572 {
1573 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1574
1575 if (!wops->port_attr_bridge_flags_set)
1576 return -EOPNOTSUPP;
1577
1578 if (switchdev_trans_ph_prepare(trans))
1579 return 0;
1580
1581 return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1582 trans);
1583 }
1584
1585 static int
1586 rocker_world_port_attr_bridge_flags_get(const struct rocker_port *rocker_port,
1587 unsigned long *p_brport_flags)
1588 {
1589 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1590
1591 if (!wops->port_attr_bridge_flags_get)
1592 return -EOPNOTSUPP;
1593 return wops->port_attr_bridge_flags_get(rocker_port, p_brport_flags);
1594 }
1595
1596 static int
1597 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1598 rocker_port,
1599 unsigned long *
1600 p_brport_flags_support)
1601 {
1602 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1603
1604 if (!wops->port_attr_bridge_flags_support_get)
1605 return -EOPNOTSUPP;
1606 return wops->port_attr_bridge_flags_support_get(rocker_port,
1607 p_brport_flags_support);
1608 }
1609
1610 static int
1611 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1612 u32 ageing_time,
1613 struct switchdev_trans *trans)
1614
1615 {
1616 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1617
1618 if (!wops->port_attr_bridge_ageing_time_set)
1619 return -EOPNOTSUPP;
1620
1621 if (switchdev_trans_ph_prepare(trans))
1622 return 0;
1623
1624 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1625 trans);
1626 }
1627
1628 static int
1629 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1630 const struct switchdev_obj_port_vlan *vlan,
1631 struct switchdev_trans *trans)
1632 {
1633 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1634
1635 if (!wops->port_obj_vlan_add)
1636 return -EOPNOTSUPP;
1637
1638 if (switchdev_trans_ph_prepare(trans))
1639 return 0;
1640
1641 return wops->port_obj_vlan_add(rocker_port, vlan);
1642 }
1643
1644 static int
1645 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1646 const struct switchdev_obj_port_vlan *vlan)
1647 {
1648 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1649
1650 if (netif_is_bridge_master(vlan->obj.orig_dev))
1651 return -EOPNOTSUPP;
1652
1653 if (!wops->port_obj_vlan_del)
1654 return -EOPNOTSUPP;
1655 return wops->port_obj_vlan_del(rocker_port, vlan);
1656 }
1657
1658 static int
1659 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1660 struct switchdev_notifier_fdb_info *info)
1661 {
1662 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1663
1664 if (!wops->port_obj_fdb_add)
1665 return -EOPNOTSUPP;
1666
1667 return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1668 }
1669
1670 static int
1671 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1672 struct switchdev_notifier_fdb_info *info)
1673 {
1674 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1675
1676 if (!wops->port_obj_fdb_del)
1677 return -EOPNOTSUPP;
1678 return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1679 }
1680
1681 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1682 struct net_device *master)
1683 {
1684 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1685
1686 if (!wops->port_master_linked)
1687 return -EOPNOTSUPP;
1688 return wops->port_master_linked(rocker_port, master);
1689 }
1690
1691 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1692 struct net_device *master)
1693 {
1694 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1695
1696 if (!wops->port_master_unlinked)
1697 return -EOPNOTSUPP;
1698 return wops->port_master_unlinked(rocker_port, master);
1699 }
1700
1701 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1702 struct neighbour *n)
1703 {
1704 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1705
1706 if (!wops->port_neigh_update)
1707 return -EOPNOTSUPP;
1708 return wops->port_neigh_update(rocker_port, n);
1709 }
1710
1711 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1712 struct neighbour *n)
1713 {
1714 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1715
1716 if (!wops->port_neigh_destroy)
1717 return -EOPNOTSUPP;
1718 return wops->port_neigh_destroy(rocker_port, n);
1719 }
1720
1721 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1722 const unsigned char *addr,
1723 __be16 vlan_id)
1724 {
1725 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1726
1727 if (!wops->port_ev_mac_vlan_seen)
1728 return -EOPNOTSUPP;
1729 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1730 }
1731
1732 static int rocker_world_fib4_add(struct rocker *rocker,
1733 const struct fib_entry_notifier_info *fen_info)
1734 {
1735 struct rocker_world_ops *wops = rocker->wops;
1736
1737 if (!wops->fib4_add)
1738 return 0;
1739 return wops->fib4_add(rocker, fen_info);
1740 }
1741
1742 static int rocker_world_fib4_del(struct rocker *rocker,
1743 const struct fib_entry_notifier_info *fen_info)
1744 {
1745 struct rocker_world_ops *wops = rocker->wops;
1746
1747 if (!wops->fib4_del)
1748 return 0;
1749 return wops->fib4_del(rocker, fen_info);
1750 }
1751
1752 static void rocker_world_fib4_abort(struct rocker *rocker)
1753 {
1754 struct rocker_world_ops *wops = rocker->wops;
1755
1756 if (wops->fib4_abort)
1757 wops->fib4_abort(rocker);
1758 }
1759
1760 /*****************
1761 * Net device ops
1762 *****************/
1763
1764 static int rocker_port_open(struct net_device *dev)
1765 {
1766 struct rocker_port *rocker_port = netdev_priv(dev);
1767 int err;
1768
1769 err = rocker_port_dma_rings_init(rocker_port);
1770 if (err)
1771 return err;
1772
1773 err = request_irq(rocker_msix_tx_vector(rocker_port),
1774 rocker_tx_irq_handler, 0,
1775 rocker_driver_name, rocker_port);
1776 if (err) {
1777 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1778 goto err_request_tx_irq;
1779 }
1780
1781 err = request_irq(rocker_msix_rx_vector(rocker_port),
1782 rocker_rx_irq_handler, 0,
1783 rocker_driver_name, rocker_port);
1784 if (err) {
1785 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1786 goto err_request_rx_irq;
1787 }
1788
1789 err = rocker_world_port_open(rocker_port);
1790 if (err) {
1791 netdev_err(rocker_port->dev, "cannot open port in world\n");
1792 goto err_world_port_open;
1793 }
1794
1795 napi_enable(&rocker_port->napi_tx);
1796 napi_enable(&rocker_port->napi_rx);
1797 if (!dev->proto_down)
1798 rocker_port_set_enable(rocker_port, true);
1799 netif_start_queue(dev);
1800 return 0;
1801
1802 err_world_port_open:
1803 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1804 err_request_rx_irq:
1805 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1806 err_request_tx_irq:
1807 rocker_port_dma_rings_fini(rocker_port);
1808 return err;
1809 }
1810
1811 static int rocker_port_stop(struct net_device *dev)
1812 {
1813 struct rocker_port *rocker_port = netdev_priv(dev);
1814
1815 netif_stop_queue(dev);
1816 rocker_port_set_enable(rocker_port, false);
1817 napi_disable(&rocker_port->napi_rx);
1818 napi_disable(&rocker_port->napi_tx);
1819 rocker_world_port_stop(rocker_port);
1820 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1821 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1822 rocker_port_dma_rings_fini(rocker_port);
1823
1824 return 0;
1825 }
1826
1827 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1828 const struct rocker_desc_info *desc_info)
1829 {
1830 const struct rocker *rocker = rocker_port->rocker;
1831 struct pci_dev *pdev = rocker->pdev;
1832 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1833 struct rocker_tlv *attr;
1834 int rem;
1835
1836 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1837 if (!attrs[ROCKER_TLV_TX_FRAGS])
1838 return;
1839 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1840 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1841 dma_addr_t dma_handle;
1842 size_t len;
1843
1844 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1845 continue;
1846 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1847 attr);
1848 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1849 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1850 continue;
1851 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1852 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1853 pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
1854 }
1855 }
1856
1857 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1858 struct rocker_desc_info *desc_info,
1859 char *buf, size_t buf_len)
1860 {
1861 const struct rocker *rocker = rocker_port->rocker;
1862 struct pci_dev *pdev = rocker->pdev;
1863 dma_addr_t dma_handle;
1864 struct rocker_tlv *frag;
1865
1866 dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
1867 if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
1868 if (net_ratelimit())
1869 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1870 return -EIO;
1871 }
1872 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1873 if (!frag)
1874 goto unmap_frag;
1875 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1876 dma_handle))
1877 goto nest_cancel;
1878 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1879 buf_len))
1880 goto nest_cancel;
1881 rocker_tlv_nest_end(desc_info, frag);
1882 return 0;
1883
1884 nest_cancel:
1885 rocker_tlv_nest_cancel(desc_info, frag);
1886 unmap_frag:
1887 pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1888 return -EMSGSIZE;
1889 }
1890
1891 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1892 {
1893 struct rocker_port *rocker_port = netdev_priv(dev);
1894 struct rocker *rocker = rocker_port->rocker;
1895 struct rocker_desc_info *desc_info;
1896 struct rocker_tlv *frags;
1897 int i;
1898 int err;
1899
1900 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1901 if (unlikely(!desc_info)) {
1902 if (net_ratelimit())
1903 netdev_err(dev, "tx ring full when queue awake\n");
1904 return NETDEV_TX_BUSY;
1905 }
1906
1907 rocker_desc_cookie_ptr_set(desc_info, skb);
1908
1909 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1910 if (!frags)
1911 goto out;
1912 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1913 skb->data, skb_headlen(skb));
1914 if (err)
1915 goto nest_cancel;
1916 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1917 err = skb_linearize(skb);
1918 if (err)
1919 goto unmap_frags;
1920 }
1921
1922 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1923 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1924
1925 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1926 skb_frag_address(frag),
1927 skb_frag_size(frag));
1928 if (err)
1929 goto unmap_frags;
1930 }
1931 rocker_tlv_nest_end(desc_info, frags);
1932
1933 rocker_desc_gen_clear(desc_info);
1934 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1935
1936 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1937 if (!desc_info)
1938 netif_stop_queue(dev);
1939
1940 return NETDEV_TX_OK;
1941
1942 unmap_frags:
1943 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1944 nest_cancel:
1945 rocker_tlv_nest_cancel(desc_info, frags);
1946 out:
1947 dev_kfree_skb(skb);
1948 dev->stats.tx_dropped++;
1949
1950 return NETDEV_TX_OK;
1951 }
1952
1953 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1954 {
1955 struct sockaddr *addr = p;
1956 struct rocker_port *rocker_port = netdev_priv(dev);
1957 int err;
1958
1959 if (!is_valid_ether_addr(addr->sa_data))
1960 return -EADDRNOTAVAIL;
1961
1962 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1963 if (err)
1964 return err;
1965 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1966 return 0;
1967 }
1968
1969 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1970 {
1971 struct rocker_port *rocker_port = netdev_priv(dev);
1972 int running = netif_running(dev);
1973 int err;
1974
1975 if (running)
1976 rocker_port_stop(dev);
1977
1978 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1979 dev->mtu = new_mtu;
1980
1981 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1982 if (err)
1983 return err;
1984
1985 if (running)
1986 err = rocker_port_open(dev);
1987
1988 return err;
1989 }
1990
1991 static int rocker_port_get_phys_port_name(struct net_device *dev,
1992 char *buf, size_t len)
1993 {
1994 struct rocker_port *rocker_port = netdev_priv(dev);
1995 struct port_name name = { .buf = buf, .len = len };
1996 int err;
1997
1998 err = rocker_cmd_exec(rocker_port, false,
1999 rocker_cmd_get_port_settings_prep, NULL,
2000 rocker_cmd_get_port_settings_phys_name_proc,
2001 &name);
2002
2003 return err ? -EOPNOTSUPP : 0;
2004 }
2005
2006 static int rocker_port_change_proto_down(struct net_device *dev,
2007 bool proto_down)
2008 {
2009 struct rocker_port *rocker_port = netdev_priv(dev);
2010
2011 if (rocker_port->dev->flags & IFF_UP)
2012 rocker_port_set_enable(rocker_port, !proto_down);
2013 rocker_port->dev->proto_down = proto_down;
2014 return 0;
2015 }
2016
2017 static void rocker_port_neigh_destroy(struct net_device *dev,
2018 struct neighbour *n)
2019 {
2020 struct rocker_port *rocker_port = netdev_priv(n->dev);
2021 int err;
2022
2023 err = rocker_world_port_neigh_destroy(rocker_port, n);
2024 if (err)
2025 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2026 err);
2027 }
2028
2029 static const struct net_device_ops rocker_port_netdev_ops = {
2030 .ndo_open = rocker_port_open,
2031 .ndo_stop = rocker_port_stop,
2032 .ndo_start_xmit = rocker_port_xmit,
2033 .ndo_set_mac_address = rocker_port_set_mac_address,
2034 .ndo_change_mtu = rocker_port_change_mtu,
2035 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2036 .ndo_change_proto_down = rocker_port_change_proto_down,
2037 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2038 };
2039
2040 /********************
2041 * swdev interface
2042 ********************/
2043
2044 static int rocker_port_attr_get(struct net_device *dev,
2045 struct switchdev_attr *attr)
2046 {
2047 const struct rocker_port *rocker_port = netdev_priv(dev);
2048 const struct rocker *rocker = rocker_port->rocker;
2049 int err = 0;
2050
2051 switch (attr->id) {
2052 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
2053 attr->u.ppid.id_len = sizeof(rocker->hw.id);
2054 memcpy(&attr->u.ppid.id, &rocker->hw.id, attr->u.ppid.id_len);
2055 break;
2056 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2057 err = rocker_world_port_attr_bridge_flags_get(rocker_port,
2058 &attr->u.brport_flags);
2059 break;
2060 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
2061 err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
2062 &attr->u.brport_flags_support);
2063 break;
2064 default:
2065 return -EOPNOTSUPP;
2066 }
2067
2068 return err;
2069 }
2070
2071 static int rocker_port_attr_set(struct net_device *dev,
2072 const struct switchdev_attr *attr,
2073 struct switchdev_trans *trans)
2074 {
2075 struct rocker_port *rocker_port = netdev_priv(dev);
2076 int err = 0;
2077
2078 switch (attr->id) {
2079 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2080 err = rocker_world_port_attr_stp_state_set(rocker_port,
2081 attr->u.stp_state,
2082 trans);
2083 break;
2084 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2085 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2086 attr->u.brport_flags,
2087 trans);
2088 break;
2089 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2090 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2091 attr->u.ageing_time,
2092 trans);
2093 break;
2094 default:
2095 err = -EOPNOTSUPP;
2096 break;
2097 }
2098
2099 return err;
2100 }
2101
2102 static int rocker_port_obj_add(struct net_device *dev,
2103 const struct switchdev_obj *obj,
2104 struct switchdev_trans *trans)
2105 {
2106 struct rocker_port *rocker_port = netdev_priv(dev);
2107 int err = 0;
2108
2109 switch (obj->id) {
2110 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2111 err = rocker_world_port_obj_vlan_add(rocker_port,
2112 SWITCHDEV_OBJ_PORT_VLAN(obj),
2113 trans);
2114 break;
2115 default:
2116 err = -EOPNOTSUPP;
2117 break;
2118 }
2119
2120 return err;
2121 }
2122
2123 static int rocker_port_obj_del(struct net_device *dev,
2124 const struct switchdev_obj *obj)
2125 {
2126 struct rocker_port *rocker_port = netdev_priv(dev);
2127 int err = 0;
2128
2129 switch (obj->id) {
2130 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2131 err = rocker_world_port_obj_vlan_del(rocker_port,
2132 SWITCHDEV_OBJ_PORT_VLAN(obj));
2133 break;
2134 default:
2135 err = -EOPNOTSUPP;
2136 break;
2137 }
2138
2139 return err;
2140 }
2141
2142 static const struct switchdev_ops rocker_port_switchdev_ops = {
2143 .switchdev_port_attr_get = rocker_port_attr_get,
2144 .switchdev_port_attr_set = rocker_port_attr_set,
2145 };
2146
2147 struct rocker_fib_event_work {
2148 struct work_struct work;
2149 union {
2150 struct fib_entry_notifier_info fen_info;
2151 struct fib_rule_notifier_info fr_info;
2152 };
2153 struct rocker *rocker;
2154 unsigned long event;
2155 };
2156
2157 static void rocker_router_fib_event_work(struct work_struct *work)
2158 {
2159 struct rocker_fib_event_work *fib_work =
2160 container_of(work, struct rocker_fib_event_work, work);
2161 struct rocker *rocker = fib_work->rocker;
2162 struct fib_rule *rule;
2163 int err;
2164
2165 /* Protect internal structures from changes */
2166 rtnl_lock();
2167 switch (fib_work->event) {
2168 case FIB_EVENT_ENTRY_ADD:
2169 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2170 if (err)
2171 rocker_world_fib4_abort(rocker);
2172 fib_info_put(fib_work->fen_info.fi);
2173 break;
2174 case FIB_EVENT_ENTRY_DEL:
2175 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2176 fib_info_put(fib_work->fen_info.fi);
2177 break;
2178 case FIB_EVENT_RULE_ADD: /* fall through */
2179 case FIB_EVENT_RULE_DEL:
2180 rule = fib_work->fr_info.rule;
2181 if (!fib4_rule_default(rule))
2182 rocker_world_fib4_abort(rocker);
2183 fib_rule_put(rule);
2184 break;
2185 }
2186 rtnl_unlock();
2187 kfree(fib_work);
2188 }
2189
2190 /* Called with rcu_read_lock() */
2191 static int rocker_router_fib_event(struct notifier_block *nb,
2192 unsigned long event, void *ptr)
2193 {
2194 struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2195 struct rocker_fib_event_work *fib_work;
2196 struct fib_notifier_info *info = ptr;
2197
2198 if (info->family != AF_INET)
2199 return NOTIFY_DONE;
2200
2201 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2202 if (WARN_ON(!fib_work))
2203 return NOTIFY_BAD;
2204
2205 INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2206 fib_work->rocker = rocker;
2207 fib_work->event = event;
2208
2209 switch (event) {
2210 case FIB_EVENT_ENTRY_ADD: /* fall through */
2211 case FIB_EVENT_ENTRY_DEL:
2212 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2213 /* Take referece on fib_info to prevent it from being
2214 * freed while work is queued. Release it afterwards.
2215 */
2216 fib_info_hold(fib_work->fen_info.fi);
2217 break;
2218 case FIB_EVENT_RULE_ADD: /* fall through */
2219 case FIB_EVENT_RULE_DEL:
2220 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2221 fib_rule_get(fib_work->fr_info.rule);
2222 break;
2223 }
2224
2225 queue_work(rocker->rocker_owq, &fib_work->work);
2226
2227 return NOTIFY_DONE;
2228 }
2229
2230 /********************
2231 * ethtool interface
2232 ********************/
2233
2234 static int
2235 rocker_port_get_link_ksettings(struct net_device *dev,
2236 struct ethtool_link_ksettings *ecmd)
2237 {
2238 struct rocker_port *rocker_port = netdev_priv(dev);
2239
2240 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2241 }
2242
2243 static int
2244 rocker_port_set_link_ksettings(struct net_device *dev,
2245 const struct ethtool_link_ksettings *ecmd)
2246 {
2247 struct rocker_port *rocker_port = netdev_priv(dev);
2248
2249 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2250 }
2251
2252 static void rocker_port_get_drvinfo(struct net_device *dev,
2253 struct ethtool_drvinfo *drvinfo)
2254 {
2255 strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2256 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2257 }
2258
2259 static struct rocker_port_stats {
2260 char str[ETH_GSTRING_LEN];
2261 int type;
2262 } rocker_port_stats[] = {
2263 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2264 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2265 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2266 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2267
2268 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2269 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2270 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2271 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2272 };
2273
2274 #define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2275
2276 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2277 u8 *data)
2278 {
2279 u8 *p = data;
2280 int i;
2281
2282 switch (stringset) {
2283 case ETH_SS_STATS:
2284 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2285 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2286 p += ETH_GSTRING_LEN;
2287 }
2288 break;
2289 }
2290 }
2291
2292 static int
2293 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2294 struct rocker_desc_info *desc_info,
2295 void *priv)
2296 {
2297 struct rocker_tlv *cmd_stats;
2298
2299 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2300 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2301 return -EMSGSIZE;
2302
2303 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2304 if (!cmd_stats)
2305 return -EMSGSIZE;
2306
2307 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2308 rocker_port->pport))
2309 return -EMSGSIZE;
2310
2311 rocker_tlv_nest_end(desc_info, cmd_stats);
2312
2313 return 0;
2314 }
2315
2316 static int
2317 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2318 const struct rocker_desc_info *desc_info,
2319 void *priv)
2320 {
2321 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2322 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2323 const struct rocker_tlv *pattr;
2324 u32 pport;
2325 u64 *data = priv;
2326 int i;
2327
2328 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2329
2330 if (!attrs[ROCKER_TLV_CMD_INFO])
2331 return -EIO;
2332
2333 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2334 attrs[ROCKER_TLV_CMD_INFO]);
2335
2336 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2337 return -EIO;
2338
2339 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2340 if (pport != rocker_port->pport)
2341 return -EIO;
2342
2343 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2344 pattr = stats_attrs[rocker_port_stats[i].type];
2345 if (!pattr)
2346 continue;
2347
2348 data[i] = rocker_tlv_get_u64(pattr);
2349 }
2350
2351 return 0;
2352 }
2353
2354 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2355 void *priv)
2356 {
2357 return rocker_cmd_exec(rocker_port, false,
2358 rocker_cmd_get_port_stats_prep, NULL,
2359 rocker_cmd_get_port_stats_ethtool_proc,
2360 priv);
2361 }
2362
2363 static void rocker_port_get_stats(struct net_device *dev,
2364 struct ethtool_stats *stats, u64 *data)
2365 {
2366 struct rocker_port *rocker_port = netdev_priv(dev);
2367
2368 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2369 int i;
2370
2371 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2372 data[i] = 0;
2373 }
2374 }
2375
2376 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2377 {
2378 switch (sset) {
2379 case ETH_SS_STATS:
2380 return ROCKER_PORT_STATS_LEN;
2381 default:
2382 return -EOPNOTSUPP;
2383 }
2384 }
2385
2386 static const struct ethtool_ops rocker_port_ethtool_ops = {
2387 .get_drvinfo = rocker_port_get_drvinfo,
2388 .get_link = ethtool_op_get_link,
2389 .get_strings = rocker_port_get_strings,
2390 .get_ethtool_stats = rocker_port_get_stats,
2391 .get_sset_count = rocker_port_get_sset_count,
2392 .get_link_ksettings = rocker_port_get_link_ksettings,
2393 .set_link_ksettings = rocker_port_set_link_ksettings,
2394 };
2395
2396 /*****************
2397 * NAPI interface
2398 *****************/
2399
2400 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2401 {
2402 return container_of(napi, struct rocker_port, napi_tx);
2403 }
2404
2405 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2406 {
2407 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2408 const struct rocker *rocker = rocker_port->rocker;
2409 const struct rocker_desc_info *desc_info;
2410 u32 credits = 0;
2411 int err;
2412
2413 /* Cleanup tx descriptors */
2414 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2415 struct sk_buff *skb;
2416
2417 err = rocker_desc_err(desc_info);
2418 if (err && net_ratelimit())
2419 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2420 err);
2421 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2422
2423 skb = rocker_desc_cookie_ptr_get(desc_info);
2424 if (err == 0) {
2425 rocker_port->dev->stats.tx_packets++;
2426 rocker_port->dev->stats.tx_bytes += skb->len;
2427 } else {
2428 rocker_port->dev->stats.tx_errors++;
2429 }
2430
2431 dev_kfree_skb_any(skb);
2432 credits++;
2433 }
2434
2435 if (credits && netif_queue_stopped(rocker_port->dev))
2436 netif_wake_queue(rocker_port->dev);
2437
2438 napi_complete(napi);
2439 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2440
2441 return 0;
2442 }
2443
2444 static int rocker_port_rx_proc(const struct rocker *rocker,
2445 const struct rocker_port *rocker_port,
2446 struct rocker_desc_info *desc_info)
2447 {
2448 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2449 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2450 size_t rx_len;
2451 u16 rx_flags = 0;
2452
2453 if (!skb)
2454 return -ENOENT;
2455
2456 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2457 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2458 return -EINVAL;
2459 if (attrs[ROCKER_TLV_RX_FLAGS])
2460 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2461
2462 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2463
2464 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2465 skb_put(skb, rx_len);
2466 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2467
2468 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2469 skb->offload_fwd_mark = 1;
2470
2471 rocker_port->dev->stats.rx_packets++;
2472 rocker_port->dev->stats.rx_bytes += skb->len;
2473
2474 netif_receive_skb(skb);
2475
2476 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2477 }
2478
2479 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2480 {
2481 return container_of(napi, struct rocker_port, napi_rx);
2482 }
2483
2484 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2485 {
2486 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2487 const struct rocker *rocker = rocker_port->rocker;
2488 struct rocker_desc_info *desc_info;
2489 u32 credits = 0;
2490 int err;
2491
2492 /* Process rx descriptors */
2493 while (credits < budget &&
2494 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2495 err = rocker_desc_err(desc_info);
2496 if (err) {
2497 if (net_ratelimit())
2498 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2499 err);
2500 } else {
2501 err = rocker_port_rx_proc(rocker, rocker_port,
2502 desc_info);
2503 if (err && net_ratelimit())
2504 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2505 err);
2506 }
2507 if (err)
2508 rocker_port->dev->stats.rx_errors++;
2509
2510 rocker_desc_gen_clear(desc_info);
2511 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2512 credits++;
2513 }
2514
2515 if (credits < budget)
2516 napi_complete_done(napi, credits);
2517
2518 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2519
2520 return credits;
2521 }
2522
2523 /*****************
2524 * PCI driver ops
2525 *****************/
2526
2527 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2528 {
2529 const struct rocker *rocker = rocker_port->rocker;
2530 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2531 bool link_up;
2532
2533 link_up = link_status & (1 << rocker_port->pport);
2534 if (link_up)
2535 netif_carrier_on(rocker_port->dev);
2536 else
2537 netif_carrier_off(rocker_port->dev);
2538 }
2539
2540 static void rocker_remove_ports(struct rocker *rocker)
2541 {
2542 struct rocker_port *rocker_port;
2543 int i;
2544
2545 for (i = 0; i < rocker->port_count; i++) {
2546 rocker_port = rocker->ports[i];
2547 if (!rocker_port)
2548 continue;
2549 rocker_world_port_fini(rocker_port);
2550 unregister_netdev(rocker_port->dev);
2551 rocker_world_port_post_fini(rocker_port);
2552 free_netdev(rocker_port->dev);
2553 }
2554 rocker_world_fini(rocker);
2555 kfree(rocker->ports);
2556 }
2557
2558 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2559 {
2560 const struct rocker *rocker = rocker_port->rocker;
2561 const struct pci_dev *pdev = rocker->pdev;
2562 int err;
2563
2564 err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2565 rocker_port->dev->dev_addr);
2566 if (err) {
2567 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2568 eth_hw_addr_random(rocker_port->dev);
2569 }
2570 }
2571
2572 #define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2573 #define ROCKER_PORT_MAX_MTU 9000
2574 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2575 {
2576 struct pci_dev *pdev = rocker->pdev;
2577 struct rocker_port *rocker_port;
2578 struct net_device *dev;
2579 int err;
2580
2581 dev = alloc_etherdev(sizeof(struct rocker_port));
2582 if (!dev)
2583 return -ENOMEM;
2584 SET_NETDEV_DEV(dev, &pdev->dev);
2585 rocker_port = netdev_priv(dev);
2586 rocker_port->dev = dev;
2587 rocker_port->rocker = rocker;
2588 rocker_port->port_number = port_number;
2589 rocker_port->pport = port_number + 1;
2590
2591 err = rocker_world_check_init(rocker_port);
2592 if (err) {
2593 dev_err(&pdev->dev, "world init failed\n");
2594 goto err_world_check_init;
2595 }
2596
2597 rocker_port_dev_addr_init(rocker_port);
2598 dev->netdev_ops = &rocker_port_netdev_ops;
2599 dev->ethtool_ops = &rocker_port_ethtool_ops;
2600 dev->switchdev_ops = &rocker_port_switchdev_ops;
2601 netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2602 NAPI_POLL_WEIGHT);
2603 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2604 NAPI_POLL_WEIGHT);
2605 rocker_carrier_init(rocker_port);
2606
2607 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2608
2609 /* MTU range: 68 - 9000 */
2610 dev->min_mtu = ROCKER_PORT_MIN_MTU;
2611 dev->max_mtu = ROCKER_PORT_MAX_MTU;
2612
2613 err = rocker_world_port_pre_init(rocker_port);
2614 if (err) {
2615 dev_err(&pdev->dev, "port world pre-init failed\n");
2616 goto err_world_port_pre_init;
2617 }
2618 err = register_netdev(dev);
2619 if (err) {
2620 dev_err(&pdev->dev, "register_netdev failed\n");
2621 goto err_register_netdev;
2622 }
2623 rocker->ports[port_number] = rocker_port;
2624
2625 err = rocker_world_port_init(rocker_port);
2626 if (err) {
2627 dev_err(&pdev->dev, "port world init failed\n");
2628 goto err_world_port_init;
2629 }
2630
2631 return 0;
2632
2633 err_world_port_init:
2634 rocker->ports[port_number] = NULL;
2635 unregister_netdev(dev);
2636 err_register_netdev:
2637 rocker_world_port_post_fini(rocker_port);
2638 err_world_port_pre_init:
2639 err_world_check_init:
2640 free_netdev(dev);
2641 return err;
2642 }
2643
2644 static int rocker_probe_ports(struct rocker *rocker)
2645 {
2646 int i;
2647 size_t alloc_size;
2648 int err;
2649
2650 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2651 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2652 if (!rocker->ports)
2653 return -ENOMEM;
2654 for (i = 0; i < rocker->port_count; i++) {
2655 err = rocker_probe_port(rocker, i);
2656 if (err)
2657 goto remove_ports;
2658 }
2659 return 0;
2660
2661 remove_ports:
2662 rocker_remove_ports(rocker);
2663 return err;
2664 }
2665
2666 static int rocker_msix_init(struct rocker *rocker)
2667 {
2668 struct pci_dev *pdev = rocker->pdev;
2669 int msix_entries;
2670 int i;
2671 int err;
2672
2673 msix_entries = pci_msix_vec_count(pdev);
2674 if (msix_entries < 0)
2675 return msix_entries;
2676
2677 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2678 return -EINVAL;
2679
2680 rocker->msix_entries = kmalloc_array(msix_entries,
2681 sizeof(struct msix_entry),
2682 GFP_KERNEL);
2683 if (!rocker->msix_entries)
2684 return -ENOMEM;
2685
2686 for (i = 0; i < msix_entries; i++)
2687 rocker->msix_entries[i].entry = i;
2688
2689 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2690 if (err < 0)
2691 goto err_enable_msix;
2692
2693 return 0;
2694
2695 err_enable_msix:
2696 kfree(rocker->msix_entries);
2697 return err;
2698 }
2699
2700 static void rocker_msix_fini(const struct rocker *rocker)
2701 {
2702 pci_disable_msix(rocker->pdev);
2703 kfree(rocker->msix_entries);
2704 }
2705
2706 static bool rocker_port_dev_check(const struct net_device *dev)
2707 {
2708 return dev->netdev_ops == &rocker_port_netdev_ops;
2709 }
2710
2711 struct rocker_switchdev_event_work {
2712 struct work_struct work;
2713 struct switchdev_notifier_fdb_info fdb_info;
2714 struct rocker_port *rocker_port;
2715 unsigned long event;
2716 };
2717
2718 static void
2719 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2720 struct switchdev_notifier_fdb_info *recv_info)
2721 {
2722 struct switchdev_notifier_fdb_info info;
2723
2724 info.addr = recv_info->addr;
2725 info.vid = recv_info->vid;
2726 info.offloaded = true;
2727 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2728 rocker_port->dev, &info.info);
2729 }
2730
2731 static void rocker_switchdev_event_work(struct work_struct *work)
2732 {
2733 struct rocker_switchdev_event_work *switchdev_work =
2734 container_of(work, struct rocker_switchdev_event_work, work);
2735 struct rocker_port *rocker_port = switchdev_work->rocker_port;
2736 struct switchdev_notifier_fdb_info *fdb_info;
2737 int err;
2738
2739 rtnl_lock();
2740 switch (switchdev_work->event) {
2741 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2742 fdb_info = &switchdev_work->fdb_info;
2743 if (!fdb_info->added_by_user)
2744 break;
2745 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2746 if (err) {
2747 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2748 break;
2749 }
2750 rocker_fdb_offload_notify(rocker_port, fdb_info);
2751 break;
2752 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2753 fdb_info = &switchdev_work->fdb_info;
2754 if (!fdb_info->added_by_user)
2755 break;
2756 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2757 if (err)
2758 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2759 break;
2760 }
2761 rtnl_unlock();
2762
2763 kfree(switchdev_work->fdb_info.addr);
2764 kfree(switchdev_work);
2765 dev_put(rocker_port->dev);
2766 }
2767
2768 /* called under rcu_read_lock() */
2769 static int rocker_switchdev_event(struct notifier_block *unused,
2770 unsigned long event, void *ptr)
2771 {
2772 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2773 struct rocker_switchdev_event_work *switchdev_work;
2774 struct switchdev_notifier_fdb_info *fdb_info = ptr;
2775 struct rocker_port *rocker_port;
2776
2777 if (!rocker_port_dev_check(dev))
2778 return NOTIFY_DONE;
2779
2780 rocker_port = netdev_priv(dev);
2781 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2782 if (WARN_ON(!switchdev_work))
2783 return NOTIFY_BAD;
2784
2785 INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2786 switchdev_work->rocker_port = rocker_port;
2787 switchdev_work->event = event;
2788
2789 switch (event) {
2790 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
2791 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2792 memcpy(&switchdev_work->fdb_info, ptr,
2793 sizeof(switchdev_work->fdb_info));
2794 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2795 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2796 fdb_info->addr);
2797 /* Take a reference on the rocker device */
2798 dev_hold(dev);
2799 break;
2800 default:
2801 kfree(switchdev_work);
2802 return NOTIFY_DONE;
2803 }
2804
2805 queue_work(rocker_port->rocker->rocker_owq,
2806 &switchdev_work->work);
2807 return NOTIFY_DONE;
2808 }
2809
2810 static int
2811 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2812 struct switchdev_notifier_port_obj_info *port_obj_info)
2813 {
2814 int err = -EOPNOTSUPP;
2815
2816 switch (event) {
2817 case SWITCHDEV_PORT_OBJ_ADD:
2818 err = rocker_port_obj_add(netdev, port_obj_info->obj,
2819 port_obj_info->trans);
2820 break;
2821 case SWITCHDEV_PORT_OBJ_DEL:
2822 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2823 break;
2824 }
2825
2826 port_obj_info->handled = true;
2827 return notifier_from_errno(err);
2828 }
2829
2830 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2831 unsigned long event, void *ptr)
2832 {
2833 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2834
2835 if (!rocker_port_dev_check(dev))
2836 return NOTIFY_DONE;
2837
2838 switch (event) {
2839 case SWITCHDEV_PORT_OBJ_ADD:
2840 case SWITCHDEV_PORT_OBJ_DEL:
2841 return rocker_switchdev_port_obj_event(event, dev, ptr);
2842 }
2843
2844 return NOTIFY_DONE;
2845 }
2846
2847 static struct notifier_block rocker_switchdev_notifier = {
2848 .notifier_call = rocker_switchdev_event,
2849 };
2850
2851 static struct notifier_block rocker_switchdev_blocking_notifier = {
2852 .notifier_call = rocker_switchdev_blocking_event,
2853 };
2854
2855 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2856 {
2857 struct notifier_block *nb;
2858 struct rocker *rocker;
2859 int err;
2860
2861 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2862 if (!rocker)
2863 return -ENOMEM;
2864
2865 err = pci_enable_device(pdev);
2866 if (err) {
2867 dev_err(&pdev->dev, "pci_enable_device failed\n");
2868 goto err_pci_enable_device;
2869 }
2870
2871 err = pci_request_regions(pdev, rocker_driver_name);
2872 if (err) {
2873 dev_err(&pdev->dev, "pci_request_regions failed\n");
2874 goto err_pci_request_regions;
2875 }
2876
2877 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2878 if (!err) {
2879 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2880 if (err) {
2881 dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2882 goto err_pci_set_dma_mask;
2883 }
2884 } else {
2885 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2886 if (err) {
2887 dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2888 goto err_pci_set_dma_mask;
2889 }
2890 }
2891
2892 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2893 dev_err(&pdev->dev, "invalid PCI region size\n");
2894 err = -EINVAL;
2895 goto err_pci_resource_len_check;
2896 }
2897
2898 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2899 pci_resource_len(pdev, 0));
2900 if (!rocker->hw_addr) {
2901 dev_err(&pdev->dev, "ioremap failed\n");
2902 err = -EIO;
2903 goto err_ioremap;
2904 }
2905 pci_set_master(pdev);
2906
2907 rocker->pdev = pdev;
2908 pci_set_drvdata(pdev, rocker);
2909
2910 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2911
2912 err = rocker_msix_init(rocker);
2913 if (err) {
2914 dev_err(&pdev->dev, "MSI-X init failed\n");
2915 goto err_msix_init;
2916 }
2917
2918 err = rocker_basic_hw_test(rocker);
2919 if (err) {
2920 dev_err(&pdev->dev, "basic hw test failed\n");
2921 goto err_basic_hw_test;
2922 }
2923
2924 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2925
2926 err = rocker_dma_rings_init(rocker);
2927 if (err)
2928 goto err_dma_rings_init;
2929
2930 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2931 rocker_cmd_irq_handler, 0,
2932 rocker_driver_name, rocker);
2933 if (err) {
2934 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2935 goto err_request_cmd_irq;
2936 }
2937
2938 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2939 rocker_event_irq_handler, 0,
2940 rocker_driver_name, rocker);
2941 if (err) {
2942 dev_err(&pdev->dev, "cannot assign event irq\n");
2943 goto err_request_event_irq;
2944 }
2945
2946 rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2947 WQ_MEM_RECLAIM);
2948 if (!rocker->rocker_owq) {
2949 err = -ENOMEM;
2950 goto err_alloc_ordered_workqueue;
2951 }
2952
2953 err = rocker_probe_ports(rocker);
2954 if (err) {
2955 dev_err(&pdev->dev, "failed to probe ports\n");
2956 goto err_probe_ports;
2957 }
2958
2959 /* Only FIBs pointing to our own netdevs are programmed into
2960 * the device, so no need to pass a callback.
2961 */
2962 rocker->fib_nb.notifier_call = rocker_router_fib_event;
2963 err = register_fib_notifier(&rocker->fib_nb, NULL);
2964 if (err)
2965 goto err_register_fib_notifier;
2966
2967 err = register_switchdev_notifier(&rocker_switchdev_notifier);
2968 if (err) {
2969 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2970 goto err_register_switchdev_notifier;
2971 }
2972
2973 nb = &rocker_switchdev_blocking_notifier;
2974 err = register_switchdev_blocking_notifier(nb);
2975 if (err) {
2976 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2977 goto err_register_switchdev_blocking_notifier;
2978 }
2979
2980 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2981
2982 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2983 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2984
2985 return 0;
2986
2987 err_register_switchdev_blocking_notifier:
2988 unregister_switchdev_notifier(&rocker_switchdev_notifier);
2989 err_register_switchdev_notifier:
2990 unregister_fib_notifier(&rocker->fib_nb);
2991 err_register_fib_notifier:
2992 rocker_remove_ports(rocker);
2993 err_probe_ports:
2994 destroy_workqueue(rocker->rocker_owq);
2995 err_alloc_ordered_workqueue:
2996 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2997 err_request_event_irq:
2998 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2999 err_request_cmd_irq:
3000 rocker_dma_rings_fini(rocker);
3001 err_dma_rings_init:
3002 err_basic_hw_test:
3003 rocker_msix_fini(rocker);
3004 err_msix_init:
3005 iounmap(rocker->hw_addr);
3006 err_ioremap:
3007 err_pci_resource_len_check:
3008 err_pci_set_dma_mask:
3009 pci_release_regions(pdev);
3010 err_pci_request_regions:
3011 pci_disable_device(pdev);
3012 err_pci_enable_device:
3013 kfree(rocker);
3014 return err;
3015 }
3016
3017 static void rocker_remove(struct pci_dev *pdev)
3018 {
3019 struct rocker *rocker = pci_get_drvdata(pdev);
3020 struct notifier_block *nb;
3021
3022 nb = &rocker_switchdev_blocking_notifier;
3023 unregister_switchdev_blocking_notifier(nb);
3024
3025 unregister_switchdev_notifier(&rocker_switchdev_notifier);
3026 unregister_fib_notifier(&rocker->fib_nb);
3027 rocker_remove_ports(rocker);
3028 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3029 destroy_workqueue(rocker->rocker_owq);
3030 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3031 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3032 rocker_dma_rings_fini(rocker);
3033 rocker_msix_fini(rocker);
3034 iounmap(rocker->hw_addr);
3035 pci_release_regions(rocker->pdev);
3036 pci_disable_device(rocker->pdev);
3037 kfree(rocker);
3038 }
3039
3040 static struct pci_driver rocker_pci_driver = {
3041 .name = rocker_driver_name,
3042 .id_table = rocker_pci_id_table,
3043 .probe = rocker_probe,
3044 .remove = rocker_remove,
3045 };
3046
3047 /************************************
3048 * Net device notifier event handler
3049 ************************************/
3050
3051 static bool rocker_port_dev_check_under(const struct net_device *dev,
3052 struct rocker *rocker)
3053 {
3054 struct rocker_port *rocker_port;
3055
3056 if (!rocker_port_dev_check(dev))
3057 return false;
3058
3059 rocker_port = netdev_priv(dev);
3060 if (rocker_port->rocker != rocker)
3061 return false;
3062
3063 return true;
3064 }
3065
3066 struct rocker_walk_data {
3067 struct rocker *rocker;
3068 struct rocker_port *port;
3069 };
3070
3071 static int rocker_lower_dev_walk(struct net_device *lower_dev, void *_data)
3072 {
3073 struct rocker_walk_data *data = _data;
3074 int ret = 0;
3075
3076 if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3077 data->port = netdev_priv(lower_dev);
3078 ret = 1;
3079 }
3080
3081 return ret;
3082 }
3083
3084 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3085 struct rocker *rocker)
3086 {
3087 struct rocker_walk_data data;
3088
3089 if (rocker_port_dev_check_under(dev, rocker))
3090 return netdev_priv(dev);
3091
3092 data.rocker = rocker;
3093 data.port = NULL;
3094 netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &data);
3095
3096 return data.port;
3097 }
3098
3099 static int rocker_netdevice_event(struct notifier_block *unused,
3100 unsigned long event, void *ptr)
3101 {
3102 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3103 struct netdev_notifier_changeupper_info *info;
3104 struct rocker_port *rocker_port;
3105 int err;
3106
3107 if (!rocker_port_dev_check(dev))
3108 return NOTIFY_DONE;
3109
3110 switch (event) {
3111 case NETDEV_CHANGEUPPER:
3112 info = ptr;
3113 if (!info->master)
3114 goto out;
3115 rocker_port = netdev_priv(dev);
3116 if (info->linking) {
3117 err = rocker_world_port_master_linked(rocker_port,
3118 info->upper_dev);
3119 if (err)
3120 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3121 err);
3122 } else {
3123 err = rocker_world_port_master_unlinked(rocker_port,
3124 info->upper_dev);
3125 if (err)
3126 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3127 err);
3128 }
3129 }
3130 out:
3131 return NOTIFY_DONE;
3132 }
3133
3134 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3135 .notifier_call = rocker_netdevice_event,
3136 };
3137
3138 /************************************
3139 * Net event notifier event handler
3140 ************************************/
3141
3142 static int rocker_netevent_event(struct notifier_block *unused,
3143 unsigned long event, void *ptr)
3144 {
3145 struct rocker_port *rocker_port;
3146 struct net_device *dev;
3147 struct neighbour *n = ptr;
3148 int err;
3149
3150 switch (event) {
3151 case NETEVENT_NEIGH_UPDATE:
3152 if (n->tbl != &arp_tbl)
3153 return NOTIFY_DONE;
3154 dev = n->dev;
3155 if (!rocker_port_dev_check(dev))
3156 return NOTIFY_DONE;
3157 rocker_port = netdev_priv(dev);
3158 err = rocker_world_port_neigh_update(rocker_port, n);
3159 if (err)
3160 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3161 err);
3162 break;
3163 }
3164
3165 return NOTIFY_DONE;
3166 }
3167
3168 static struct notifier_block rocker_netevent_nb __read_mostly = {
3169 .notifier_call = rocker_netevent_event,
3170 };
3171
3172 /***********************
3173 * Module init and exit
3174 ***********************/
3175
3176 static int __init rocker_module_init(void)
3177 {
3178 int err;
3179
3180 register_netdevice_notifier(&rocker_netdevice_nb);
3181 register_netevent_notifier(&rocker_netevent_nb);
3182 err = pci_register_driver(&rocker_pci_driver);
3183 if (err)
3184 goto err_pci_register_driver;
3185 return 0;
3186
3187 err_pci_register_driver:
3188 unregister_netevent_notifier(&rocker_netevent_nb);
3189 unregister_netdevice_notifier(&rocker_netdevice_nb);
3190 return err;
3191 }
3192
3193 static void __exit rocker_module_exit(void)
3194 {
3195 unregister_netevent_notifier(&rocker_netevent_nb);
3196 unregister_netdevice_notifier(&rocker_netdevice_nb);
3197 pci_unregister_driver(&rocker_pci_driver);
3198 }
3199
3200 module_init(rocker_module_init);
3201 module_exit(rocker_module_exit);
3202
3203 MODULE_LICENSE("GPL v2");
3204 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3205 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3206 MODULE_DESCRIPTION("Rocker switch device driver");
3207 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
Ubuntu Hirsute Linux kernel mirror