?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / ethernet / rocker / rocker_main.c
blobdd0bc7f0aaeeeddeefe8bdead667ea67e9a480ca
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
4 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/pci.h>
11 #include <linux/interrupt.h>
12 #include <linux/sched.h>
13 #include <linux/wait.h>
14 #include <linux/spinlock.h>
15 #include <linux/sort.h>
16 #include <linux/random.h>
17 #include <linux/netdevice.h>
18 #include <linux/skbuff.h>
19 #include <linux/socket.h>
20 #include <linux/etherdevice.h>
21 #include <linux/ethtool.h>
22 #include <linux/if_ether.h>
23 #include <linux/if_vlan.h>
24 #include <linux/if_bridge.h>
25 #include <linux/bitops.h>
26 #include <linux/ctype.h>
27 #include <linux/workqueue.h>
28 #include <net/switchdev.h>
29 #include <net/rtnetlink.h>
30 #include <net/netevent.h>
31 #include <net/arp.h>
32 #include <net/fib_rules.h>
33 #include <net/fib_notifier.h>
34 #include <linux/io-64-nonatomic-lo-hi.h>
35 #include <generated/utsrelease.h>
36
37 #include "rocker_hw.h"
38 #include "rocker.h"
39 #include "rocker_tlv.h"
40
41 static const char rocker_driver_name[] = "rocker";
42
43 static const struct pci_device_id rocker_pci_id_table[] = {
44 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
45 {0, }
46 };
47
48 struct rocker_wait {
49 wait_queue_head_t wait;
50 bool done;
51 bool nowait;
52 };
53
54 static void rocker_wait_reset(struct rocker_wait *wait)
55 {
56 wait->done = false;
57 wait->nowait = false;
58 }
59
60 static void rocker_wait_init(struct rocker_wait *wait)
61 {
62 init_waitqueue_head(&wait->wait);
63 rocker_wait_reset(wait);
64 }
65
66 static struct rocker_wait *rocker_wait_create(void)
67 {
68 struct rocker_wait *wait;
69
70 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
71 if (!wait)
72 return NULL;
73 return wait;
74 }
75
76 static void rocker_wait_destroy(struct rocker_wait *wait)
77 {
78 kfree(wait);
79 }
80
81 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
82 unsigned long timeout)
83 {
84 wait_event_timeout(wait->wait, wait->done, HZ / 10);
85 if (!wait->done)
86 return false;
87 return true;
88 }
89
90 static void rocker_wait_wake_up(struct rocker_wait *wait)
91 {
92 wait->done = true;
93 wake_up(&wait->wait);
94 }
95
96 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
97 {
98 return rocker->msix_entries[vector].vector;
99 }
100
101 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
102 {
103 return rocker_msix_vector(rocker_port->rocker,
104 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
105 }
106
107 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
108 {
109 return rocker_msix_vector(rocker_port->rocker,
110 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
111 }
112
113 #define rocker_write32(rocker, reg, val) \
114 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
115 #define rocker_read32(rocker, reg) \
116 readl((rocker)->hw_addr + (ROCKER_ ## reg))
117 #define rocker_write64(rocker, reg, val) \
118 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119 #define rocker_read64(rocker, reg) \
120 readq((rocker)->hw_addr + (ROCKER_ ## reg))
121
122 /*****************************
123 * HW basic testing functions
124 *****************************/
125
126 static int rocker_reg_test(const struct rocker *rocker)
127 {
128 const struct pci_dev *pdev = rocker->pdev;
129 u64 test_reg;
130 u64 rnd;
131
132 rnd = prandom_u32();
133 rnd >>= 1;
134 rocker_write32(rocker, TEST_REG, rnd);
135 test_reg = rocker_read32(rocker, TEST_REG);
136 if (test_reg != rnd * 2) {
137 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
138 test_reg, rnd * 2);
139 return -EIO;
140 }
141
142 rnd = prandom_u32();
143 rnd <<= 31;
144 rnd |= prandom_u32();
145 rocker_write64(rocker, TEST_REG64, rnd);
146 test_reg = rocker_read64(rocker, TEST_REG64);
147 if (test_reg != rnd * 2) {
148 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
149 test_reg, rnd * 2);
150 return -EIO;
151 }
152
153 return 0;
154 }
155
156 static int rocker_dma_test_one(const struct rocker *rocker,
157 struct rocker_wait *wait, u32 test_type,
158 dma_addr_t dma_handle, const unsigned char *buf,
159 const unsigned char *expect, size_t size)
160 {
161 const struct pci_dev *pdev = rocker->pdev;
162 int i;
163
164 rocker_wait_reset(wait);
165 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
166
167 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
168 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
169 return -EIO;
170 }
171
172 for (i = 0; i < size; i++) {
173 if (buf[i] != expect[i]) {
174 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
175 buf[i], i, expect[i]);
176 return -EIO;
177 }
178 }
179 return 0;
180 }
181
182 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
183 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
184
185 static int rocker_dma_test_offset(const struct rocker *rocker,
186 struct rocker_wait *wait, int offset)
187 {
188 struct pci_dev *pdev = rocker->pdev;
189 unsigned char *alloc;
190 unsigned char *buf;
191 unsigned char *expect;
192 dma_addr_t dma_handle;
193 int i;
194 int err;
195
196 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
197 GFP_KERNEL | GFP_DMA);
198 if (!alloc)
199 return -ENOMEM;
200 buf = alloc + offset;
201 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
202
203 dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
204 DMA_BIDIRECTIONAL);
205 if (dma_mapping_error(&pdev->dev, dma_handle)) {
206 err = -EIO;
207 goto free_alloc;
208 }
209
210 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
211 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
212
213 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
214 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
215 dma_handle, buf, expect,
216 ROCKER_TEST_DMA_BUF_SIZE);
217 if (err)
218 goto unmap;
219
220 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
221 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
222 dma_handle, buf, expect,
223 ROCKER_TEST_DMA_BUF_SIZE);
224 if (err)
225 goto unmap;
226
227 prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
228 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
229 expect[i] = ~buf[i];
230 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
231 dma_handle, buf, expect,
232 ROCKER_TEST_DMA_BUF_SIZE);
233 if (err)
234 goto unmap;
235
236 unmap:
237 dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
238 DMA_BIDIRECTIONAL);
239 free_alloc:
240 kfree(alloc);
241
242 return err;
243 }
244
245 static int rocker_dma_test(const struct rocker *rocker,
246 struct rocker_wait *wait)
247 {
248 int i;
249 int err;
250
251 for (i = 0; i < 8; i++) {
252 err = rocker_dma_test_offset(rocker, wait, i);
253 if (err)
254 return err;
255 }
256 return 0;
257 }
258
259 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
260 {
261 struct rocker_wait *wait = dev_id;
262
263 rocker_wait_wake_up(wait);
264
265 return IRQ_HANDLED;
266 }
267
268 static int rocker_basic_hw_test(const struct rocker *rocker)
269 {
270 const struct pci_dev *pdev = rocker->pdev;
271 struct rocker_wait wait;
272 int err;
273
274 err = rocker_reg_test(rocker);
275 if (err) {
276 dev_err(&pdev->dev, "reg test failed\n");
277 return err;
278 }
279
280 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
281 rocker_test_irq_handler, 0,
282 rocker_driver_name, &wait);
283 if (err) {
284 dev_err(&pdev->dev, "cannot assign test irq\n");
285 return err;
286 }
287
288 rocker_wait_init(&wait);
289 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
290
291 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
292 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
293 err = -EIO;
294 goto free_irq;
295 }
296
297 err = rocker_dma_test(rocker, &wait);
298 if (err)
299 dev_err(&pdev->dev, "dma test failed\n");
300
301 free_irq:
302 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
303 return err;
304 }
305
306 /******************************************
307 * DMA rings and descriptors manipulations
308 ******************************************/
309
310 static u32 __pos_inc(u32 pos, size_t limit)
311 {
312 return ++pos == limit ? 0 : pos;
313 }
314
315 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
316 {
317 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
318
319 switch (err) {
320 case ROCKER_OK:
321 return 0;
322 case -ROCKER_ENOENT:
323 return -ENOENT;
324 case -ROCKER_ENXIO:
325 return -ENXIO;
326 case -ROCKER_ENOMEM:
327 return -ENOMEM;
328 case -ROCKER_EEXIST:
329 return -EEXIST;
330 case -ROCKER_EINVAL:
331 return -EINVAL;
332 case -ROCKER_EMSGSIZE:
333 return -EMSGSIZE;
334 case -ROCKER_ENOTSUP:
335 return -EOPNOTSUPP;
336 case -ROCKER_ENOBUFS:
337 return -ENOBUFS;
338 }
339
340 return -EINVAL;
341 }
342
343 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
344 {
345 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
346 }
347
348 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
349 {
350 u32 comp_err = desc_info->desc->comp_err;
351
352 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
353 }
354
355 static void *
356 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
357 {
358 return (void *)(uintptr_t)desc_info->desc->cookie;
359 }
360
361 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
362 void *ptr)
363 {
364 desc_info->desc->cookie = (uintptr_t) ptr;
365 }
366
367 static struct rocker_desc_info *
368 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
369 {
370 struct rocker_desc_info *desc_info;
371 u32 head = __pos_inc(info->head, info->size);
372
373 desc_info = &info->desc_info[info->head];
374 if (head == info->tail)
375 return NULL; /* ring full */
376 desc_info->tlv_size = 0;
377 return desc_info;
378 }
379
380 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
381 {
382 desc_info->desc->buf_size = desc_info->data_size;
383 desc_info->desc->tlv_size = desc_info->tlv_size;
384 }
385
386 static void rocker_desc_head_set(const struct rocker *rocker,
387 struct rocker_dma_ring_info *info,
388 const struct rocker_desc_info *desc_info)
389 {
390 u32 head = __pos_inc(info->head, info->size);
391
392 BUG_ON(head == info->tail);
393 rocker_desc_commit(desc_info);
394 info->head = head;
395 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
396 }
397
398 static struct rocker_desc_info *
399 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
400 {
401 struct rocker_desc_info *desc_info;
402
403 if (info->tail == info->head)
404 return NULL; /* nothing to be done between head and tail */
405 desc_info = &info->desc_info[info->tail];
406 if (!rocker_desc_gen(desc_info))
407 return NULL; /* gen bit not set, desc is not ready yet */
408 info->tail = __pos_inc(info->tail, info->size);
409 desc_info->tlv_size = desc_info->desc->tlv_size;
410 return desc_info;
411 }
412
413 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
414 const struct rocker_dma_ring_info *info,
415 u32 credits)
416 {
417 if (credits)
418 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
419 }
420
421 static unsigned long rocker_dma_ring_size_fix(size_t size)
422 {
423 return max(ROCKER_DMA_SIZE_MIN,
424 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
425 }
426
427 static int rocker_dma_ring_create(const struct rocker *rocker,
428 unsigned int type,
429 size_t size,
430 struct rocker_dma_ring_info *info)
431 {
432 int i;
433
434 BUG_ON(size != rocker_dma_ring_size_fix(size));
435 info->size = size;
436 info->type = type;
437 info->head = 0;
438 info->tail = 0;
439 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
440 GFP_KERNEL);
441 if (!info->desc_info)
442 return -ENOMEM;
443
444 info->desc = dma_alloc_coherent(&rocker->pdev->dev,
445 info->size * sizeof(*info->desc),
446 &info->mapaddr, GFP_KERNEL);
447 if (!info->desc) {
448 kfree(info->desc_info);
449 return -ENOMEM;
450 }
451
452 for (i = 0; i < info->size; i++)
453 info->desc_info[i].desc = &info->desc[i];
454
455 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
456 ROCKER_DMA_DESC_CTRL_RESET);
457 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
458 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
459
460 return 0;
461 }
462
463 static void rocker_dma_ring_destroy(const struct rocker *rocker,
464 const struct rocker_dma_ring_info *info)
465 {
466 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
467
468 dma_free_coherent(&rocker->pdev->dev,
469 info->size * sizeof(struct rocker_desc), info->desc,
470 info->mapaddr);
471 kfree(info->desc_info);
472 }
473
474 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
475 struct rocker_dma_ring_info *info)
476 {
477 int i;
478
479 BUG_ON(info->head || info->tail);
480
481 /* When ring is consumer, we need to advance head for each desc.
482 * That tells hw that the desc is ready to be used by it.
483 */
484 for (i = 0; i < info->size - 1; i++)
485 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
486 rocker_desc_commit(&info->desc_info[i]);
487 }
488
489 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
490 const struct rocker_dma_ring_info *info,
491 int direction, size_t buf_size)
492 {
493 struct pci_dev *pdev = rocker->pdev;
494 int i;
495 int err;
496
497 for (i = 0; i < info->size; i++) {
498 struct rocker_desc_info *desc_info = &info->desc_info[i];
499 struct rocker_desc *desc = &info->desc[i];
500 dma_addr_t dma_handle;
501 char *buf;
502
503 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
504 if (!buf) {
505 err = -ENOMEM;
506 goto rollback;
507 }
508
509 dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
510 direction);
511 if (dma_mapping_error(&pdev->dev, dma_handle)) {
512 kfree(buf);
513 err = -EIO;
514 goto rollback;
515 }
516
517 desc_info->data = buf;
518 desc_info->data_size = buf_size;
519 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
520
521 desc->buf_addr = dma_handle;
522 desc->buf_size = buf_size;
523 }
524 return 0;
525
526 rollback:
527 for (i--; i >= 0; i--) {
528 const struct rocker_desc_info *desc_info = &info->desc_info[i];
529
530 dma_unmap_single(&pdev->dev,
531 dma_unmap_addr(desc_info, mapaddr),
532 desc_info->data_size, direction);
533 kfree(desc_info->data);
534 }
535 return err;
536 }
537
538 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
539 const struct rocker_dma_ring_info *info,
540 int direction)
541 {
542 struct pci_dev *pdev = rocker->pdev;
543 int i;
544
545 for (i = 0; i < info->size; i++) {
546 const struct rocker_desc_info *desc_info = &info->desc_info[i];
547 struct rocker_desc *desc = &info->desc[i];
548
549 desc->buf_addr = 0;
550 desc->buf_size = 0;
551 dma_unmap_single(&pdev->dev,
552 dma_unmap_addr(desc_info, mapaddr),
553 desc_info->data_size, direction);
554 kfree(desc_info->data);
555 }
556 }
557
558 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
559 {
560 struct rocker_wait *wait;
561
562 wait = rocker_wait_create();
563 if (!wait)
564 return -ENOMEM;
565 rocker_desc_cookie_ptr_set(desc_info, wait);
566 return 0;
567 }
568
569 static void
570 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
571 {
572 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
573
574 rocker_wait_destroy(wait);
575 }
576
577 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
578 {
579 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
580 int i;
581 int err;
582
583 for (i = 0; i < cmd_ring->size; i++) {
584 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
585 if (err)
586 goto rollback;
587 }
588 return 0;
589
590 rollback:
591 for (i--; i >= 0; i--)
592 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
593 return err;
594 }
595
596 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
597 {
598 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
599 int i;
600
601 for (i = 0; i < cmd_ring->size; i++)
602 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
603 }
604
605 static int rocker_dma_rings_init(struct rocker *rocker)
606 {
607 const struct pci_dev *pdev = rocker->pdev;
608 int err;
609
610 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
611 ROCKER_DMA_CMD_DEFAULT_SIZE,
612 &rocker->cmd_ring);
613 if (err) {
614 dev_err(&pdev->dev, "failed to create command dma ring\n");
615 return err;
616 }
617
618 spin_lock_init(&rocker->cmd_ring_lock);
619
620 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
621 DMA_BIDIRECTIONAL, PAGE_SIZE);
622 if (err) {
623 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
624 goto err_dma_cmd_ring_bufs_alloc;
625 }
626
627 err = rocker_dma_cmd_ring_waits_alloc(rocker);
628 if (err) {
629 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
630 goto err_dma_cmd_ring_waits_alloc;
631 }
632
633 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
634 ROCKER_DMA_EVENT_DEFAULT_SIZE,
635 &rocker->event_ring);
636 if (err) {
637 dev_err(&pdev->dev, "failed to create event dma ring\n");
638 goto err_dma_event_ring_create;
639 }
640
641 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
642 DMA_FROM_DEVICE, PAGE_SIZE);
643 if (err) {
644 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
645 goto err_dma_event_ring_bufs_alloc;
646 }
647 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
648 return 0;
649
650 err_dma_event_ring_bufs_alloc:
651 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
652 err_dma_event_ring_create:
653 rocker_dma_cmd_ring_waits_free(rocker);
654 err_dma_cmd_ring_waits_alloc:
655 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
656 DMA_BIDIRECTIONAL);
657 err_dma_cmd_ring_bufs_alloc:
658 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
659 return err;
660 }
661
662 static void rocker_dma_rings_fini(struct rocker *rocker)
663 {
664 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
665 DMA_BIDIRECTIONAL);
666 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
667 rocker_dma_cmd_ring_waits_free(rocker);
668 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
669 DMA_BIDIRECTIONAL);
670 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
671 }
672
673 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
674 struct rocker_desc_info *desc_info,
675 struct sk_buff *skb, size_t buf_len)
676 {
677 const struct rocker *rocker = rocker_port->rocker;
678 struct pci_dev *pdev = rocker->pdev;
679 dma_addr_t dma_handle;
680
681 dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
682 DMA_FROM_DEVICE);
683 if (dma_mapping_error(&pdev->dev, dma_handle))
684 return -EIO;
685 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
686 goto tlv_put_failure;
687 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
688 goto tlv_put_failure;
689 return 0;
690
691 tlv_put_failure:
692 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
693 desc_info->tlv_size = 0;
694 return -EMSGSIZE;
695 }
696
697 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
698 {
699 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
700 }
701
702 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
703 struct rocker_desc_info *desc_info)
704 {
705 struct net_device *dev = rocker_port->dev;
706 struct sk_buff *skb;
707 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
708 int err;
709
710 /* Ensure that hw will see tlv_size zero in case of an error.
711 * That tells hw to use another descriptor.
712 */
713 rocker_desc_cookie_ptr_set(desc_info, NULL);
714 desc_info->tlv_size = 0;
715
716 skb = netdev_alloc_skb_ip_align(dev, buf_len);
717 if (!skb)
718 return -ENOMEM;
719 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
720 if (err) {
721 dev_kfree_skb_any(skb);
722 return err;
723 }
724 rocker_desc_cookie_ptr_set(desc_info, skb);
725 return 0;
726 }
727
728 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
729 const struct rocker_tlv **attrs)
730 {
731 struct pci_dev *pdev = rocker->pdev;
732 dma_addr_t dma_handle;
733 size_t len;
734
735 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
736 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
737 return;
738 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
739 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
740 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
741 }
742
743 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
744 const struct rocker_desc_info *desc_info)
745 {
746 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
747 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
748
749 if (!skb)
750 return;
751 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
752 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
753 dev_kfree_skb_any(skb);
754 }
755
756 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
757 {
758 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
759 const struct rocker *rocker = rocker_port->rocker;
760 int i;
761 int err;
762
763 for (i = 0; i < rx_ring->size; i++) {
764 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
765 &rx_ring->desc_info[i]);
766 if (err)
767 goto rollback;
768 }
769 return 0;
770
771 rollback:
772 for (i--; i >= 0; i--)
773 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
774 return err;
775 }
776
777 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
778 {
779 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
780 const struct rocker *rocker = rocker_port->rocker;
781 int i;
782
783 for (i = 0; i < rx_ring->size; i++)
784 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
785 }
786
787 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
788 {
789 struct rocker *rocker = rocker_port->rocker;
790 int err;
791
792 err = rocker_dma_ring_create(rocker,
793 ROCKER_DMA_TX(rocker_port->port_number),
794 ROCKER_DMA_TX_DEFAULT_SIZE,
795 &rocker_port->tx_ring);
796 if (err) {
797 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
798 return err;
799 }
800
801 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
802 DMA_TO_DEVICE,
803 ROCKER_DMA_TX_DESC_SIZE);
804 if (err) {
805 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
806 goto err_dma_tx_ring_bufs_alloc;
807 }
808
809 err = rocker_dma_ring_create(rocker,
810 ROCKER_DMA_RX(rocker_port->port_number),
811 ROCKER_DMA_RX_DEFAULT_SIZE,
812 &rocker_port->rx_ring);
813 if (err) {
814 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
815 goto err_dma_rx_ring_create;
816 }
817
818 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
819 DMA_BIDIRECTIONAL,
820 ROCKER_DMA_RX_DESC_SIZE);
821 if (err) {
822 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
823 goto err_dma_rx_ring_bufs_alloc;
824 }
825
826 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
827 if (err) {
828 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
829 goto err_dma_rx_ring_skbs_alloc;
830 }
831 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
832
833 return 0;
834
835 err_dma_rx_ring_skbs_alloc:
836 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
837 DMA_BIDIRECTIONAL);
838 err_dma_rx_ring_bufs_alloc:
839 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
840 err_dma_rx_ring_create:
841 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
842 DMA_TO_DEVICE);
843 err_dma_tx_ring_bufs_alloc:
844 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
845 return err;
846 }
847
848 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
849 {
850 struct rocker *rocker = rocker_port->rocker;
851
852 rocker_dma_rx_ring_skbs_free(rocker_port);
853 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
854 DMA_BIDIRECTIONAL);
855 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
856 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
857 DMA_TO_DEVICE);
858 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
859 }
860
861 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
862 bool enable)
863 {
864 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
865
866 if (enable)
867 val |= 1ULL << rocker_port->pport;
868 else
869 val &= ~(1ULL << rocker_port->pport);
870 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
871 }
872
873 /********************************
874 * Interrupt handler and helpers
875 ********************************/
876
877 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
878 {
879 struct rocker *rocker = dev_id;
880 const struct rocker_desc_info *desc_info;
881 struct rocker_wait *wait;
882 u32 credits = 0;
883
884 spin_lock(&rocker->cmd_ring_lock);
885 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
886 wait = rocker_desc_cookie_ptr_get(desc_info);
887 if (wait->nowait) {
888 rocker_desc_gen_clear(desc_info);
889 } else {
890 rocker_wait_wake_up(wait);
891 }
892 credits++;
893 }
894 spin_unlock(&rocker->cmd_ring_lock);
895 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
896
897 return IRQ_HANDLED;
898 }
899
900 static void rocker_port_link_up(const struct rocker_port *rocker_port)
901 {
902 netif_carrier_on(rocker_port->dev);
903 netdev_info(rocker_port->dev, "Link is up\n");
904 }
905
906 static void rocker_port_link_down(const struct rocker_port *rocker_port)
907 {
908 netif_carrier_off(rocker_port->dev);
909 netdev_info(rocker_port->dev, "Link is down\n");
910 }
911
912 static int rocker_event_link_change(const struct rocker *rocker,
913 const struct rocker_tlv *info)
914 {
915 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
916 unsigned int port_number;
917 bool link_up;
918 struct rocker_port *rocker_port;
919
920 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
921 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
922 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
923 return -EIO;
924 port_number =
925 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
926 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
927
928 if (port_number >= rocker->port_count)
929 return -EINVAL;
930
931 rocker_port = rocker->ports[port_number];
932 if (netif_carrier_ok(rocker_port->dev) != link_up) {
933 if (link_up)
934 rocker_port_link_up(rocker_port);
935 else
936 rocker_port_link_down(rocker_port);
937 }
938
939 return 0;
940 }
941
942 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
943 const unsigned char *addr,
944 __be16 vlan_id);
945
946 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
947 const struct rocker_tlv *info)
948 {
949 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
950 unsigned int port_number;
951 struct rocker_port *rocker_port;
952 const unsigned char *addr;
953 __be16 vlan_id;
954
955 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
956 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
957 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
958 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
959 return -EIO;
960 port_number =
961 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
962 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
963 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
964
965 if (port_number >= rocker->port_count)
966 return -EINVAL;
967
968 rocker_port = rocker->ports[port_number];
969 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
970 }
971
972 static int rocker_event_process(const struct rocker *rocker,
973 const struct rocker_desc_info *desc_info)
974 {
975 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
976 const struct rocker_tlv *info;
977 u16 type;
978
979 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
980 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
981 !attrs[ROCKER_TLV_EVENT_INFO])
982 return -EIO;
983
984 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
985 info = attrs[ROCKER_TLV_EVENT_INFO];
986
987 switch (type) {
988 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
989 return rocker_event_link_change(rocker, info);
990 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
991 return rocker_event_mac_vlan_seen(rocker, info);
992 }
993
994 return -EOPNOTSUPP;
995 }
996
997 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
998 {
999 struct rocker *rocker = dev_id;
1000 const struct pci_dev *pdev = rocker->pdev;
1001 const struct rocker_desc_info *desc_info;
1002 u32 credits = 0;
1003 int err;
1004
1005 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1006 err = rocker_desc_err(desc_info);
1007 if (err) {
1008 dev_err(&pdev->dev, "event desc received with err %d\n",
1009 err);
1010 } else {
1011 err = rocker_event_process(rocker, desc_info);
1012 if (err)
1013 dev_err(&pdev->dev, "event processing failed with err %d\n",
1014 err);
1015 }
1016 rocker_desc_gen_clear(desc_info);
1017 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1018 credits++;
1019 }
1020 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1021
1022 return IRQ_HANDLED;
1023 }
1024
1025 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026 {
1027 struct rocker_port *rocker_port = dev_id;
1028
1029 napi_schedule(&rocker_port->napi_tx);
1030 return IRQ_HANDLED;
1031 }
1032
1033 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034 {
1035 struct rocker_port *rocker_port = dev_id;
1036
1037 napi_schedule(&rocker_port->napi_rx);
1038 return IRQ_HANDLED;
1039 }
1040
1041 /********************
1042 * Command interface
1043 ********************/
1044
1045 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047 rocker_cmd_proc_cb_t process, void *process_priv)
1048 {
1049 struct rocker *rocker = rocker_port->rocker;
1050 struct rocker_desc_info *desc_info;
1051 struct rocker_wait *wait;
1052 unsigned long lock_flags;
1053 int err;
1054
1055 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1058 if (!desc_info) {
1059 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1060 return -EAGAIN;
1061 }
1062
1063 wait = rocker_desc_cookie_ptr_get(desc_info);
1064 rocker_wait_init(wait);
1065 wait->nowait = nowait;
1066
1067 err = prepare(rocker_port, desc_info, prepare_priv);
1068 if (err) {
1069 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1070 return err;
1071 }
1072
1073 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1074
1075 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1076
1077 if (nowait)
1078 return 0;
1079
1080 if (!rocker_wait_event_timeout(wait, HZ / 10))
1081 return -EIO;
1082
1083 err = rocker_desc_err(desc_info);
1084 if (err)
1085 return err;
1086
1087 if (process)
1088 err = process(rocker_port, desc_info, process_priv);
1089
1090 rocker_desc_gen_clear(desc_info);
1091 return err;
1092 }
1093
1094 static int
1095 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096 struct rocker_desc_info *desc_info,
1097 void *priv)
1098 {
1099 struct rocker_tlv *cmd_info;
1100
1101 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1102 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1103 return -EMSGSIZE;
1104 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1105 if (!cmd_info)
1106 return -EMSGSIZE;
1107 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1108 rocker_port->pport))
1109 return -EMSGSIZE;
1110 rocker_tlv_nest_end(desc_info, cmd_info);
1111 return 0;
1112 }
1113
1114 static int
1115 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116 const struct rocker_desc_info *desc_info,
1117 void *priv)
1118 {
1119 struct ethtool_link_ksettings *ecmd = priv;
1120 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122 u32 speed;
1123 u8 duplex;
1124 u8 autoneg;
1125
1126 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1127 if (!attrs[ROCKER_TLV_CMD_INFO])
1128 return -EIO;
1129
1130 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1131 attrs[ROCKER_TLV_CMD_INFO]);
1132 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1133 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1134 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1135 return -EIO;
1136
1137 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1138 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1139 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1140
1141 ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1142 ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1143
1144 ecmd->base.phy_address = 0xff;
1145 ecmd->base.port = PORT_TP;
1146 ecmd->base.speed = speed;
1147 ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1148 ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1149
1150 return 0;
1151 }
1152
1153 static int
1154 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155 const struct rocker_desc_info *desc_info,
1156 void *priv)
1157 {
1158 unsigned char *macaddr = priv;
1159 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161 const struct rocker_tlv *attr;
1162
1163 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1164 if (!attrs[ROCKER_TLV_CMD_INFO])
1165 return -EIO;
1166
1167 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1168 attrs[ROCKER_TLV_CMD_INFO]);
1169 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1170 if (!attr)
1171 return -EIO;
1172
1173 if (rocker_tlv_len(attr) != ETH_ALEN)
1174 return -EINVAL;
1175
1176 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1177 return 0;
1178 }
1179
1180 static int
1181 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182 const struct rocker_desc_info *desc_info,
1183 void *priv)
1184 {
1185 u8 *p_mode = priv;
1186 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188 const struct rocker_tlv *attr;
1189
1190 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1191 if (!attrs[ROCKER_TLV_CMD_INFO])
1192 return -EIO;
1193
1194 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1195 attrs[ROCKER_TLV_CMD_INFO]);
1196 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1197 if (!attr)
1198 return -EIO;
1199
1200 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1201 return 0;
1202 }
1203
1204 struct port_name {
1205 char *buf;
1206 size_t len;
1207 };
1208
1209 static int
1210 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211 const struct rocker_desc_info *desc_info,
1212 void *priv)
1213 {
1214 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216 struct port_name *name = priv;
1217 const struct rocker_tlv *attr;
1218 size_t i, j, len;
1219 const char *str;
1220
1221 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1222 if (!attrs[ROCKER_TLV_CMD_INFO])
1223 return -EIO;
1224
1225 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1226 attrs[ROCKER_TLV_CMD_INFO]);
1227 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1228 if (!attr)
1229 return -EIO;
1230
1231 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1232 str = rocker_tlv_data(attr);
1233
1234 /* make sure name only contains alphanumeric characters */
1235 for (i = j = 0; i < len; ++i) {
1236 if (isalnum(str[i])) {
1237 name->buf[j] = str[i];
1238 j++;
1239 }
1240 }
1241
1242 if (j == 0)
1243 return -EIO;
1244
1245 name->buf[j] = '\0';
1246
1247 return 0;
1248 }
1249
1250 static int
1251 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252 struct rocker_desc_info *desc_info,
1253 void *priv)
1254 {
1255 struct ethtool_link_ksettings *ecmd = priv;
1256 struct rocker_tlv *cmd_info;
1257
1258 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1259 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1260 return -EMSGSIZE;
1261 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1262 if (!cmd_info)
1263 return -EMSGSIZE;
1264 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1265 rocker_port->pport))
1266 return -EMSGSIZE;
1267 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1268 ecmd->base.speed))
1269 return -EMSGSIZE;
1270 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1271 ecmd->base.duplex))
1272 return -EMSGSIZE;
1273 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1274 ecmd->base.autoneg))
1275 return -EMSGSIZE;
1276 rocker_tlv_nest_end(desc_info, cmd_info);
1277 return 0;
1278 }
1279
1280 static int
1281 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282 struct rocker_desc_info *desc_info,
1283 void *priv)
1284 {
1285 const unsigned char *macaddr = priv;
1286 struct rocker_tlv *cmd_info;
1287
1288 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1289 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1290 return -EMSGSIZE;
1291 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1292 if (!cmd_info)
1293 return -EMSGSIZE;
1294 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1295 rocker_port->pport))
1296 return -EMSGSIZE;
1297 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1298 ETH_ALEN, macaddr))
1299 return -EMSGSIZE;
1300 rocker_tlv_nest_end(desc_info, cmd_info);
1301 return 0;
1302 }
1303
1304 static int
1305 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306 struct rocker_desc_info *desc_info,
1307 void *priv)
1308 {
1309 int mtu = *(int *)priv;
1310 struct rocker_tlv *cmd_info;
1311
1312 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1313 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1314 return -EMSGSIZE;
1315 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1316 if (!cmd_info)
1317 return -EMSGSIZE;
1318 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1319 rocker_port->pport))
1320 return -EMSGSIZE;
1321 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1322 mtu))
1323 return -EMSGSIZE;
1324 rocker_tlv_nest_end(desc_info, cmd_info);
1325 return 0;
1326 }
1327
1328 static int
1329 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330 struct rocker_desc_info *desc_info,
1331 void *priv)
1332 {
1333 bool learning = *(bool *)priv;
1334 struct rocker_tlv *cmd_info;
1335
1336 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1337 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1338 return -EMSGSIZE;
1339 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1340 if (!cmd_info)
1341 return -EMSGSIZE;
1342 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1343 rocker_port->pport))
1344 return -EMSGSIZE;
1345 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1346 learning))
1347 return -EMSGSIZE;
1348 rocker_tlv_nest_end(desc_info, cmd_info);
1349 return 0;
1350 }
1351
1352 static int
1353 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354 struct ethtool_link_ksettings *ecmd)
1355 {
1356 return rocker_cmd_exec(rocker_port, false,
1357 rocker_cmd_get_port_settings_prep, NULL,
1358 rocker_cmd_get_port_settings_ethtool_proc,
1359 ecmd);
1360 }
1361
1362 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363 unsigned char *macaddr)
1364 {
1365 return rocker_cmd_exec(rocker_port, false,
1366 rocker_cmd_get_port_settings_prep, NULL,
1367 rocker_cmd_get_port_settings_macaddr_proc,
1368 macaddr);
1369 }
1370
1371 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372 u8 *p_mode)
1373 {
1374 return rocker_cmd_exec(rocker_port, false,
1375 rocker_cmd_get_port_settings_prep, NULL,
1376 rocker_cmd_get_port_settings_mode_proc, p_mode);
1377 }
1378
1379 static int
1380 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381 const struct ethtool_link_ksettings *ecmd)
1382 {
1383 struct ethtool_link_ksettings copy_ecmd;
1384
1385 memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387 return rocker_cmd_exec(rocker_port, false,
1388 rocker_cmd_set_port_settings_ethtool_prep,
1389 &copy_ecmd, NULL, NULL);
1390 }
1391
1392 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393 unsigned char *macaddr)
1394 {
1395 return rocker_cmd_exec(rocker_port, false,
1396 rocker_cmd_set_port_settings_macaddr_prep,
1397 macaddr, NULL, NULL);
1398 }
1399
1400 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401 int mtu)
1402 {
1403 return rocker_cmd_exec(rocker_port, false,
1404 rocker_cmd_set_port_settings_mtu_prep,
1405 &mtu, NULL, NULL);
1406 }
1407
1408 int rocker_port_set_learning(struct rocker_port *rocker_port,
1409 bool learning)
1410 {
1411 return rocker_cmd_exec(rocker_port, false,
1412 rocker_cmd_set_port_learning_prep,
1413 &learning, NULL, NULL);
1414 }
1415
1416 /**********************
1417 * Worlds manipulation
1418 **********************/
1419
1420 static struct rocker_world_ops *rocker_world_ops[] = {
1421 &rocker_ofdpa_ops,
1422 };
1423
1424 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427 {
1428 int i;
1429
1430 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431 if (rocker_world_ops[i]->mode == mode)
1432 return rocker_world_ops[i];
1433 return NULL;
1434 }
1435
1436 static int rocker_world_init(struct rocker *rocker, u8 mode)
1437 {
1438 struct rocker_world_ops *wops;
1439 int err;
1440
1441 wops = rocker_world_ops_find(mode);
1442 if (!wops) {
1443 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444 mode);
1445 return -EINVAL;
1446 }
1447 rocker->wops = wops;
1448 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1449 if (!rocker->wpriv)
1450 return -ENOMEM;
1451 if (!wops->init)
1452 return 0;
1453 err = wops->init(rocker);
1454 if (err)
1455 kfree(rocker->wpriv);
1456 return err;
1457 }
1458
1459 static void rocker_world_fini(struct rocker *rocker)
1460 {
1461 struct rocker_world_ops *wops = rocker->wops;
1462
1463 if (!wops || !wops->fini)
1464 return;
1465 wops->fini(rocker);
1466 kfree(rocker->wpriv);
1467 }
1468
1469 static int rocker_world_check_init(struct rocker_port *rocker_port)
1470 {
1471 struct rocker *rocker = rocker_port->rocker;
1472 u8 mode;
1473 int err;
1474
1475 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1476 if (err) {
1477 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478 return err;
1479 }
1480 if (rocker->wops) {
1481 if (rocker->wops->mode != mode) {
1482 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483 return -EINVAL;
1484 }
1485 return 0;
1486 }
1487 return rocker_world_init(rocker, mode);
1488 }
1489
1490 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491 {
1492 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493 int err;
1494
1495 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1496 if (!rocker_port->wpriv)
1497 return -ENOMEM;
1498 if (!wops->port_pre_init)
1499 return 0;
1500 err = wops->port_pre_init(rocker_port);
1501 if (err)
1502 kfree(rocker_port->wpriv);
1503 return 0;
1504 }
1505
1506 static int rocker_world_port_init(struct rocker_port *rocker_port)
1507 {
1508 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510 if (!wops->port_init)
1511 return 0;
1512 return wops->port_init(rocker_port);
1513 }
1514
1515 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516 {
1517 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519 if (!wops->port_fini)
1520 return;
1521 wops->port_fini(rocker_port);
1522 }
1523
1524 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525 {
1526 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528 if (!wops->port_post_fini)
1529 return;
1530 wops->port_post_fini(rocker_port);
1531 kfree(rocker_port->wpriv);
1532 }
1533
1534 static int rocker_world_port_open(struct rocker_port *rocker_port)
1535 {
1536 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538 if (!wops->port_open)
1539 return 0;
1540 return wops->port_open(rocker_port);
1541 }
1542
1543 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544 {
1545 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547 if (!wops->port_stop)
1548 return;
1549 wops->port_stop(rocker_port);
1550 }
1551
1552 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553 u8 state,
1554 struct switchdev_trans *trans)
1555 {
1556 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1557
1558 if (!wops->port_attr_stp_state_set)
1559 return -EOPNOTSUPP;
1560
1561 if (switchdev_trans_ph_prepare(trans))
1562 return 0;
1563
1564 return wops->port_attr_stp_state_set(rocker_port, state);
1565 }
1566
1567 static int
1568 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1569 rocker_port,
1570 unsigned long *
1571 p_brport_flags_support)
1572 {
1573 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1574
1575 if (!wops->port_attr_bridge_flags_support_get)
1576 return -EOPNOTSUPP;
1577 return wops->port_attr_bridge_flags_support_get(rocker_port,
1578 p_brport_flags_support);
1579 }
1580
1581 static int
1582 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1583 unsigned long brport_flags,
1584 struct switchdev_trans *trans)
1585 {
1586 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1587 unsigned long brport_flags_s;
1588 int err;
1589
1590 if (!wops->port_attr_bridge_flags_set)
1591 return -EOPNOTSUPP;
1592
1593 err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1594 &brport_flags_s);
1595 if (err)
1596 return err;
1597
1598 if (brport_flags & ~brport_flags_s)
1599 return -EINVAL;
1600
1601 return 0;
1602 }
1603
1604 static int
1605 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1606 unsigned long brport_flags,
1607 struct switchdev_trans *trans)
1608 {
1609 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1610
1611 if (!wops->port_attr_bridge_flags_set)
1612 return -EOPNOTSUPP;
1613
1614 if (switchdev_trans_ph_prepare(trans))
1615 return 0;
1616
1617 return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1618 trans);
1619 }
1620
1621 static int
1622 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1623 u32 ageing_time,
1624 struct switchdev_trans *trans)
1625
1626 {
1627 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629 if (!wops->port_attr_bridge_ageing_time_set)
1630 return -EOPNOTSUPP;
1631
1632 if (switchdev_trans_ph_prepare(trans))
1633 return 0;
1634
1635 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1636 trans);
1637 }
1638
1639 static int
1640 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1641 const struct switchdev_obj_port_vlan *vlan,
1642 struct switchdev_trans *trans)
1643 {
1644 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1645
1646 if (!wops->port_obj_vlan_add)
1647 return -EOPNOTSUPP;
1648
1649 if (switchdev_trans_ph_prepare(trans))
1650 return 0;
1651
1652 return wops->port_obj_vlan_add(rocker_port, vlan);
1653 }
1654
1655 static int
1656 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1657 const struct switchdev_obj_port_vlan *vlan)
1658 {
1659 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1660
1661 if (netif_is_bridge_master(vlan->obj.orig_dev))
1662 return -EOPNOTSUPP;
1663
1664 if (!wops->port_obj_vlan_del)
1665 return -EOPNOTSUPP;
1666 return wops->port_obj_vlan_del(rocker_port, vlan);
1667 }
1668
1669 static int
1670 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1671 struct switchdev_notifier_fdb_info *info)
1672 {
1673 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1674
1675 if (!wops->port_obj_fdb_add)
1676 return -EOPNOTSUPP;
1677
1678 return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1679 }
1680
1681 static int
1682 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1683 struct switchdev_notifier_fdb_info *info)
1684 {
1685 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1686
1687 if (!wops->port_obj_fdb_del)
1688 return -EOPNOTSUPP;
1689 return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1690 }
1691
1692 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1693 struct net_device *master)
1694 {
1695 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1696
1697 if (!wops->port_master_linked)
1698 return -EOPNOTSUPP;
1699 return wops->port_master_linked(rocker_port, master);
1700 }
1701
1702 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1703 struct net_device *master)
1704 {
1705 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1706
1707 if (!wops->port_master_unlinked)
1708 return -EOPNOTSUPP;
1709 return wops->port_master_unlinked(rocker_port, master);
1710 }
1711
1712 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1713 struct neighbour *n)
1714 {
1715 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1716
1717 if (!wops->port_neigh_update)
1718 return -EOPNOTSUPP;
1719 return wops->port_neigh_update(rocker_port, n);
1720 }
1721
1722 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1723 struct neighbour *n)
1724 {
1725 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1726
1727 if (!wops->port_neigh_destroy)
1728 return -EOPNOTSUPP;
1729 return wops->port_neigh_destroy(rocker_port, n);
1730 }
1731
1732 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1733 const unsigned char *addr,
1734 __be16 vlan_id)
1735 {
1736 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1737
1738 if (!wops->port_ev_mac_vlan_seen)
1739 return -EOPNOTSUPP;
1740 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1741 }
1742
1743 static int rocker_world_fib4_add(struct rocker *rocker,
1744 const struct fib_entry_notifier_info *fen_info)
1745 {
1746 struct rocker_world_ops *wops = rocker->wops;
1747
1748 if (!wops->fib4_add)
1749 return 0;
1750 return wops->fib4_add(rocker, fen_info);
1751 }
1752
1753 static int rocker_world_fib4_del(struct rocker *rocker,
1754 const struct fib_entry_notifier_info *fen_info)
1755 {
1756 struct rocker_world_ops *wops = rocker->wops;
1757
1758 if (!wops->fib4_del)
1759 return 0;
1760 return wops->fib4_del(rocker, fen_info);
1761 }
1762
1763 static void rocker_world_fib4_abort(struct rocker *rocker)
1764 {
1765 struct rocker_world_ops *wops = rocker->wops;
1766
1767 if (wops->fib4_abort)
1768 wops->fib4_abort(rocker);
1769 }
1770
1771 /*****************
1772 * Net device ops
1773 *****************/
1774
1775 static int rocker_port_open(struct net_device *dev)
1776 {
1777 struct rocker_port *rocker_port = netdev_priv(dev);
1778 int err;
1779
1780 err = rocker_port_dma_rings_init(rocker_port);
1781 if (err)
1782 return err;
1783
1784 err = request_irq(rocker_msix_tx_vector(rocker_port),
1785 rocker_tx_irq_handler, 0,
1786 rocker_driver_name, rocker_port);
1787 if (err) {
1788 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1789 goto err_request_tx_irq;
1790 }
1791
1792 err = request_irq(rocker_msix_rx_vector(rocker_port),
1793 rocker_rx_irq_handler, 0,
1794 rocker_driver_name, rocker_port);
1795 if (err) {
1796 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1797 goto err_request_rx_irq;
1798 }
1799
1800 err = rocker_world_port_open(rocker_port);
1801 if (err) {
1802 netdev_err(rocker_port->dev, "cannot open port in world\n");
1803 goto err_world_port_open;
1804 }
1805
1806 napi_enable(&rocker_port->napi_tx);
1807 napi_enable(&rocker_port->napi_rx);
1808 if (!dev->proto_down)
1809 rocker_port_set_enable(rocker_port, true);
1810 netif_start_queue(dev);
1811 return 0;
1812
1813 err_world_port_open:
1814 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1815 err_request_rx_irq:
1816 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1817 err_request_tx_irq:
1818 rocker_port_dma_rings_fini(rocker_port);
1819 return err;
1820 }
1821
1822 static int rocker_port_stop(struct net_device *dev)
1823 {
1824 struct rocker_port *rocker_port = netdev_priv(dev);
1825
1826 netif_stop_queue(dev);
1827 rocker_port_set_enable(rocker_port, false);
1828 napi_disable(&rocker_port->napi_rx);
1829 napi_disable(&rocker_port->napi_tx);
1830 rocker_world_port_stop(rocker_port);
1831 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1832 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1833 rocker_port_dma_rings_fini(rocker_port);
1834
1835 return 0;
1836 }
1837
1838 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1839 const struct rocker_desc_info *desc_info)
1840 {
1841 const struct rocker *rocker = rocker_port->rocker;
1842 struct pci_dev *pdev = rocker->pdev;
1843 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1844 struct rocker_tlv *attr;
1845 int rem;
1846
1847 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1848 if (!attrs[ROCKER_TLV_TX_FRAGS])
1849 return;
1850 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1851 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1852 dma_addr_t dma_handle;
1853 size_t len;
1854
1855 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1856 continue;
1857 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1858 attr);
1859 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1860 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1861 continue;
1862 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1863 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1864 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1865 }
1866 }
1867
1868 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1869 struct rocker_desc_info *desc_info,
1870 char *buf, size_t buf_len)
1871 {
1872 const struct rocker *rocker = rocker_port->rocker;
1873 struct pci_dev *pdev = rocker->pdev;
1874 dma_addr_t dma_handle;
1875 struct rocker_tlv *frag;
1876
1877 dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1878 if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1879 if (net_ratelimit())
1880 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1881 return -EIO;
1882 }
1883 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1884 if (!frag)
1885 goto unmap_frag;
1886 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1887 dma_handle))
1888 goto nest_cancel;
1889 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1890 buf_len))
1891 goto nest_cancel;
1892 rocker_tlv_nest_end(desc_info, frag);
1893 return 0;
1894
1895 nest_cancel:
1896 rocker_tlv_nest_cancel(desc_info, frag);
1897 unmap_frag:
1898 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1899 return -EMSGSIZE;
1900 }
1901
1902 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1903 {
1904 struct rocker_port *rocker_port = netdev_priv(dev);
1905 struct rocker *rocker = rocker_port->rocker;
1906 struct rocker_desc_info *desc_info;
1907 struct rocker_tlv *frags;
1908 int i;
1909 int err;
1910
1911 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1912 if (unlikely(!desc_info)) {
1913 if (net_ratelimit())
1914 netdev_err(dev, "tx ring full when queue awake\n");
1915 return NETDEV_TX_BUSY;
1916 }
1917
1918 rocker_desc_cookie_ptr_set(desc_info, skb);
1919
1920 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1921 if (!frags)
1922 goto out;
1923 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1924 skb->data, skb_headlen(skb));
1925 if (err)
1926 goto nest_cancel;
1927 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1928 err = skb_linearize(skb);
1929 if (err)
1930 goto unmap_frags;
1931 }
1932
1933 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1934 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1935
1936 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1937 skb_frag_address(frag),
1938 skb_frag_size(frag));
1939 if (err)
1940 goto unmap_frags;
1941 }
1942 rocker_tlv_nest_end(desc_info, frags);
1943
1944 rocker_desc_gen_clear(desc_info);
1945 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1946
1947 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1948 if (!desc_info)
1949 netif_stop_queue(dev);
1950
1951 return NETDEV_TX_OK;
1952
1953 unmap_frags:
1954 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1955 nest_cancel:
1956 rocker_tlv_nest_cancel(desc_info, frags);
1957 out:
1958 dev_kfree_skb(skb);
1959 dev->stats.tx_dropped++;
1960
1961 return NETDEV_TX_OK;
1962 }
1963
1964 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1965 {
1966 struct sockaddr *addr = p;
1967 struct rocker_port *rocker_port = netdev_priv(dev);
1968 int err;
1969
1970 if (!is_valid_ether_addr(addr->sa_data))
1971 return -EADDRNOTAVAIL;
1972
1973 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1974 if (err)
1975 return err;
1976 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1977 return 0;
1978 }
1979
1980 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1981 {
1982 struct rocker_port *rocker_port = netdev_priv(dev);
1983 int running = netif_running(dev);
1984 int err;
1985
1986 if (running)
1987 rocker_port_stop(dev);
1988
1989 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1990 dev->mtu = new_mtu;
1991
1992 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1993 if (err)
1994 return err;
1995
1996 if (running)
1997 err = rocker_port_open(dev);
1998
1999 return err;
2000 }
2001
2002 static int rocker_port_get_phys_port_name(struct net_device *dev,
2003 char *buf, size_t len)
2004 {
2005 struct rocker_port *rocker_port = netdev_priv(dev);
2006 struct port_name name = { .buf = buf, .len = len };
2007 int err;
2008
2009 err = rocker_cmd_exec(rocker_port, false,
2010 rocker_cmd_get_port_settings_prep, NULL,
2011 rocker_cmd_get_port_settings_phys_name_proc,
2012 &name);
2013
2014 return err ? -EOPNOTSUPP : 0;
2015 }
2016
2017 static int rocker_port_change_proto_down(struct net_device *dev,
2018 bool proto_down)
2019 {
2020 struct rocker_port *rocker_port = netdev_priv(dev);
2021
2022 if (rocker_port->dev->flags & IFF_UP)
2023 rocker_port_set_enable(rocker_port, !proto_down);
2024 rocker_port->dev->proto_down = proto_down;
2025 return 0;
2026 }
2027
2028 static void rocker_port_neigh_destroy(struct net_device *dev,
2029 struct neighbour *n)
2030 {
2031 struct rocker_port *rocker_port = netdev_priv(n->dev);
2032 int err;
2033
2034 err = rocker_world_port_neigh_destroy(rocker_port, n);
2035 if (err)
2036 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2037 err);
2038 }
2039
2040 static int rocker_port_get_port_parent_id(struct net_device *dev,
2041 struct netdev_phys_item_id *ppid)
2042 {
2043 const struct rocker_port *rocker_port = netdev_priv(dev);
2044 const struct rocker *rocker = rocker_port->rocker;
2045
2046 ppid->id_len = sizeof(rocker->hw.id);
2047 memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2048
2049 return 0;
2050 }
2051
2052 static const struct net_device_ops rocker_port_netdev_ops = {
2053 .ndo_open = rocker_port_open,
2054 .ndo_stop = rocker_port_stop,
2055 .ndo_start_xmit = rocker_port_xmit,
2056 .ndo_set_mac_address = rocker_port_set_mac_address,
2057 .ndo_change_mtu = rocker_port_change_mtu,
2058 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2059 .ndo_change_proto_down = rocker_port_change_proto_down,
2060 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2061 .ndo_get_port_parent_id = rocker_port_get_port_parent_id,
2062 };
2063
2064 /********************
2065 * swdev interface
2066 ********************/
2067
2068 static int rocker_port_attr_set(struct net_device *dev,
2069 const struct switchdev_attr *attr,
2070 struct switchdev_trans *trans)
2071 {
2072 struct rocker_port *rocker_port = netdev_priv(dev);
2073 int err = 0;
2074
2075 switch (attr->id) {
2076 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2077 err = rocker_world_port_attr_stp_state_set(rocker_port,
2078 attr->u.stp_state,
2079 trans);
2080 break;
2081 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2082 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2083 attr->u.brport_flags,
2084 trans);
2085 break;
2086 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2087 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2088 attr->u.brport_flags,
2089 trans);
2090 break;
2091 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2092 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2093 attr->u.ageing_time,
2094 trans);
2095 break;
2096 default:
2097 err = -EOPNOTSUPP;
2098 break;
2099 }
2100
2101 return err;
2102 }
2103
2104 static int rocker_port_obj_add(struct net_device *dev,
2105 const struct switchdev_obj *obj,
2106 struct switchdev_trans *trans)
2107 {
2108 struct rocker_port *rocker_port = netdev_priv(dev);
2109 int err = 0;
2110
2111 switch (obj->id) {
2112 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2113 err = rocker_world_port_obj_vlan_add(rocker_port,
2114 SWITCHDEV_OBJ_PORT_VLAN(obj),
2115 trans);
2116 break;
2117 default:
2118 err = -EOPNOTSUPP;
2119 break;
2120 }
2121
2122 return err;
2123 }
2124
2125 static int rocker_port_obj_del(struct net_device *dev,
2126 const struct switchdev_obj *obj)
2127 {
2128 struct rocker_port *rocker_port = netdev_priv(dev);
2129 int err = 0;
2130
2131 switch (obj->id) {
2132 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2133 err = rocker_world_port_obj_vlan_del(rocker_port,
2134 SWITCHDEV_OBJ_PORT_VLAN(obj));
2135 break;
2136 default:
2137 err = -EOPNOTSUPP;
2138 break;
2139 }
2140
2141 return err;
2142 }
2143
2144 struct rocker_fib_event_work {
2145 struct work_struct work;
2146 union {
2147 struct fib_entry_notifier_info fen_info;
2148 struct fib_rule_notifier_info fr_info;
2149 };
2150 struct rocker *rocker;
2151 unsigned long event;
2152 };
2153
2154 static void rocker_router_fib_event_work(struct work_struct *work)
2155 {
2156 struct rocker_fib_event_work *fib_work =
2157 container_of(work, struct rocker_fib_event_work, work);
2158 struct rocker *rocker = fib_work->rocker;
2159 struct fib_rule *rule;
2160 int err;
2161
2162 /* Protect internal structures from changes */
2163 rtnl_lock();
2164 switch (fib_work->event) {
2165 case FIB_EVENT_ENTRY_REPLACE:
2166 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2167 if (err)
2168 rocker_world_fib4_abort(rocker);
2169 fib_info_put(fib_work->fen_info.fi);
2170 break;
2171 case FIB_EVENT_ENTRY_DEL:
2172 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2173 fib_info_put(fib_work->fen_info.fi);
2174 break;
2175 case FIB_EVENT_RULE_ADD:
2176 case FIB_EVENT_RULE_DEL:
2177 rule = fib_work->fr_info.rule;
2178 if (!fib4_rule_default(rule))
2179 rocker_world_fib4_abort(rocker);
2180 fib_rule_put(rule);
2181 break;
2182 }
2183 rtnl_unlock();
2184 kfree(fib_work);
2185 }
2186
2187 /* Called with rcu_read_lock() */
2188 static int rocker_router_fib_event(struct notifier_block *nb,
2189 unsigned long event, void *ptr)
2190 {
2191 struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2192 struct rocker_fib_event_work *fib_work;
2193 struct fib_notifier_info *info = ptr;
2194
2195 if (info->family != AF_INET)
2196 return NOTIFY_DONE;
2197
2198 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2199 if (WARN_ON(!fib_work))
2200 return NOTIFY_BAD;
2201
2202 INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2203 fib_work->rocker = rocker;
2204 fib_work->event = event;
2205
2206 switch (event) {
2207 case FIB_EVENT_ENTRY_REPLACE:
2208 case FIB_EVENT_ENTRY_DEL:
2209 if (info->family == AF_INET) {
2210 struct fib_entry_notifier_info *fen_info = ptr;
2211
2212 if (fen_info->fi->fib_nh_is_v6) {
2213 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2214 kfree(fib_work);
2215 return notifier_from_errno(-EINVAL);
2216 }
2217 if (fen_info->fi->nh) {
2218 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2219 kfree(fib_work);
2220 return notifier_from_errno(-EINVAL);
2221 }
2222 }
2223
2224 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2225 /* Take referece on fib_info to prevent it from being
2226 * freed while work is queued. Release it afterwards.
2227 */
2228 fib_info_hold(fib_work->fen_info.fi);
2229 break;
2230 case FIB_EVENT_RULE_ADD:
2231 case FIB_EVENT_RULE_DEL:
2232 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2233 fib_rule_get(fib_work->fr_info.rule);
2234 break;
2235 }
2236
2237 queue_work(rocker->rocker_owq, &fib_work->work);
2238
2239 return NOTIFY_DONE;
2240 }
2241
2242 /********************
2243 * ethtool interface
2244 ********************/
2245
2246 static int
2247 rocker_port_get_link_ksettings(struct net_device *dev,
2248 struct ethtool_link_ksettings *ecmd)
2249 {
2250 struct rocker_port *rocker_port = netdev_priv(dev);
2251
2252 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2253 }
2254
2255 static int
2256 rocker_port_set_link_ksettings(struct net_device *dev,
2257 const struct ethtool_link_ksettings *ecmd)
2258 {
2259 struct rocker_port *rocker_port = netdev_priv(dev);
2260
2261 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2262 }
2263
2264 static void rocker_port_get_drvinfo(struct net_device *dev,
2265 struct ethtool_drvinfo *drvinfo)
2266 {
2267 strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2268 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2269 }
2270
2271 static struct rocker_port_stats {
2272 char str[ETH_GSTRING_LEN];
2273 int type;
2274 } rocker_port_stats[] = {
2275 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2276 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2277 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2278 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2279
2280 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2281 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2282 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2283 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2284 };
2285
2286 #define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2287
2288 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2289 u8 *data)
2290 {
2291 u8 *p = data;
2292 int i;
2293
2294 switch (stringset) {
2295 case ETH_SS_STATS:
2296 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2297 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2298 p += ETH_GSTRING_LEN;
2299 }
2300 break;
2301 }
2302 }
2303
2304 static int
2305 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2306 struct rocker_desc_info *desc_info,
2307 void *priv)
2308 {
2309 struct rocker_tlv *cmd_stats;
2310
2311 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2312 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2313 return -EMSGSIZE;
2314
2315 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2316 if (!cmd_stats)
2317 return -EMSGSIZE;
2318
2319 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2320 rocker_port->pport))
2321 return -EMSGSIZE;
2322
2323 rocker_tlv_nest_end(desc_info, cmd_stats);
2324
2325 return 0;
2326 }
2327
2328 static int
2329 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2330 const struct rocker_desc_info *desc_info,
2331 void *priv)
2332 {
2333 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2334 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2335 const struct rocker_tlv *pattr;
2336 u32 pport;
2337 u64 *data = priv;
2338 int i;
2339
2340 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2341
2342 if (!attrs[ROCKER_TLV_CMD_INFO])
2343 return -EIO;
2344
2345 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2346 attrs[ROCKER_TLV_CMD_INFO]);
2347
2348 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2349 return -EIO;
2350
2351 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2352 if (pport != rocker_port->pport)
2353 return -EIO;
2354
2355 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2356 pattr = stats_attrs[rocker_port_stats[i].type];
2357 if (!pattr)
2358 continue;
2359
2360 data[i] = rocker_tlv_get_u64(pattr);
2361 }
2362
2363 return 0;
2364 }
2365
2366 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2367 void *priv)
2368 {
2369 return rocker_cmd_exec(rocker_port, false,
2370 rocker_cmd_get_port_stats_prep, NULL,
2371 rocker_cmd_get_port_stats_ethtool_proc,
2372 priv);
2373 }
2374
2375 static void rocker_port_get_stats(struct net_device *dev,
2376 struct ethtool_stats *stats, u64 *data)
2377 {
2378 struct rocker_port *rocker_port = netdev_priv(dev);
2379
2380 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2381 int i;
2382
2383 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2384 data[i] = 0;
2385 }
2386 }
2387
2388 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2389 {
2390 switch (sset) {
2391 case ETH_SS_STATS:
2392 return ROCKER_PORT_STATS_LEN;
2393 default:
2394 return -EOPNOTSUPP;
2395 }
2396 }
2397
2398 static const struct ethtool_ops rocker_port_ethtool_ops = {
2399 .get_drvinfo = rocker_port_get_drvinfo,
2400 .get_link = ethtool_op_get_link,
2401 .get_strings = rocker_port_get_strings,
2402 .get_ethtool_stats = rocker_port_get_stats,
2403 .get_sset_count = rocker_port_get_sset_count,
2404 .get_link_ksettings = rocker_port_get_link_ksettings,
2405 .set_link_ksettings = rocker_port_set_link_ksettings,
2406 };
2407
2408 /*****************
2409 * NAPI interface
2410 *****************/
2411
2412 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2413 {
2414 return container_of(napi, struct rocker_port, napi_tx);
2415 }
2416
2417 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2418 {
2419 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2420 const struct rocker *rocker = rocker_port->rocker;
2421 const struct rocker_desc_info *desc_info;
2422 u32 credits = 0;
2423 int err;
2424
2425 /* Cleanup tx descriptors */
2426 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2427 struct sk_buff *skb;
2428
2429 err = rocker_desc_err(desc_info);
2430 if (err && net_ratelimit())
2431 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2432 err);
2433 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2434
2435 skb = rocker_desc_cookie_ptr_get(desc_info);
2436 if (err == 0) {
2437 rocker_port->dev->stats.tx_packets++;
2438 rocker_port->dev->stats.tx_bytes += skb->len;
2439 } else {
2440 rocker_port->dev->stats.tx_errors++;
2441 }
2442
2443 dev_kfree_skb_any(skb);
2444 credits++;
2445 }
2446
2447 if (credits && netif_queue_stopped(rocker_port->dev))
2448 netif_wake_queue(rocker_port->dev);
2449
2450 napi_complete(napi);
2451 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2452
2453 return 0;
2454 }
2455
2456 static int rocker_port_rx_proc(const struct rocker *rocker,
2457 const struct rocker_port *rocker_port,
2458 struct rocker_desc_info *desc_info)
2459 {
2460 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2461 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2462 size_t rx_len;
2463 u16 rx_flags = 0;
2464
2465 if (!skb)
2466 return -ENOENT;
2467
2468 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2469 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2470 return -EINVAL;
2471 if (attrs[ROCKER_TLV_RX_FLAGS])
2472 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2473
2474 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2475
2476 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2477 skb_put(skb, rx_len);
2478 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2479
2480 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2481 skb->offload_fwd_mark = 1;
2482
2483 rocker_port->dev->stats.rx_packets++;
2484 rocker_port->dev->stats.rx_bytes += skb->len;
2485
2486 netif_receive_skb(skb);
2487
2488 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2489 }
2490
2491 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2492 {
2493 return container_of(napi, struct rocker_port, napi_rx);
2494 }
2495
2496 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2497 {
2498 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2499 const struct rocker *rocker = rocker_port->rocker;
2500 struct rocker_desc_info *desc_info;
2501 u32 credits = 0;
2502 int err;
2503
2504 /* Process rx descriptors */
2505 while (credits < budget &&
2506 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2507 err = rocker_desc_err(desc_info);
2508 if (err) {
2509 if (net_ratelimit())
2510 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2511 err);
2512 } else {
2513 err = rocker_port_rx_proc(rocker, rocker_port,
2514 desc_info);
2515 if (err && net_ratelimit())
2516 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2517 err);
2518 }
2519 if (err)
2520 rocker_port->dev->stats.rx_errors++;
2521
2522 rocker_desc_gen_clear(desc_info);
2523 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2524 credits++;
2525 }
2526
2527 if (credits < budget)
2528 napi_complete_done(napi, credits);
2529
2530 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2531
2532 return credits;
2533 }
2534
2535 /*****************
2536 * PCI driver ops
2537 *****************/
2538
2539 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2540 {
2541 const struct rocker *rocker = rocker_port->rocker;
2542 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2543 bool link_up;
2544
2545 link_up = link_status & (1 << rocker_port->pport);
2546 if (link_up)
2547 netif_carrier_on(rocker_port->dev);
2548 else
2549 netif_carrier_off(rocker_port->dev);
2550 }
2551
2552 static void rocker_remove_ports(struct rocker *rocker)
2553 {
2554 struct rocker_port *rocker_port;
2555 int i;
2556
2557 for (i = 0; i < rocker->port_count; i++) {
2558 rocker_port = rocker->ports[i];
2559 if (!rocker_port)
2560 continue;
2561 rocker_world_port_fini(rocker_port);
2562 unregister_netdev(rocker_port->dev);
2563 rocker_world_port_post_fini(rocker_port);
2564 free_netdev(rocker_port->dev);
2565 }
2566 rocker_world_fini(rocker);
2567 kfree(rocker->ports);
2568 }
2569
2570 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2571 {
2572 const struct rocker *rocker = rocker_port->rocker;
2573 const struct pci_dev *pdev = rocker->pdev;
2574 int err;
2575
2576 err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2577 rocker_port->dev->dev_addr);
2578 if (err) {
2579 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2580 eth_hw_addr_random(rocker_port->dev);
2581 }
2582 }
2583
2584 #define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2585 #define ROCKER_PORT_MAX_MTU 9000
2586 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2587 {
2588 struct pci_dev *pdev = rocker->pdev;
2589 struct rocker_port *rocker_port;
2590 struct net_device *dev;
2591 int err;
2592
2593 dev = alloc_etherdev(sizeof(struct rocker_port));
2594 if (!dev)
2595 return -ENOMEM;
2596 SET_NETDEV_DEV(dev, &pdev->dev);
2597 rocker_port = netdev_priv(dev);
2598 rocker_port->dev = dev;
2599 rocker_port->rocker = rocker;
2600 rocker_port->port_number = port_number;
2601 rocker_port->pport = port_number + 1;
2602
2603 err = rocker_world_check_init(rocker_port);
2604 if (err) {
2605 dev_err(&pdev->dev, "world init failed\n");
2606 goto err_world_check_init;
2607 }
2608
2609 rocker_port_dev_addr_init(rocker_port);
2610 dev->netdev_ops = &rocker_port_netdev_ops;
2611 dev->ethtool_ops = &rocker_port_ethtool_ops;
2612 netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2613 NAPI_POLL_WEIGHT);
2614 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2615 NAPI_POLL_WEIGHT);
2616 rocker_carrier_init(rocker_port);
2617
2618 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2619
2620 /* MTU range: 68 - 9000 */
2621 dev->min_mtu = ROCKER_PORT_MIN_MTU;
2622 dev->max_mtu = ROCKER_PORT_MAX_MTU;
2623
2624 err = rocker_world_port_pre_init(rocker_port);
2625 if (err) {
2626 dev_err(&pdev->dev, "port world pre-init failed\n");
2627 goto err_world_port_pre_init;
2628 }
2629 err = register_netdev(dev);
2630 if (err) {
2631 dev_err(&pdev->dev, "register_netdev failed\n");
2632 goto err_register_netdev;
2633 }
2634 rocker->ports[port_number] = rocker_port;
2635
2636 err = rocker_world_port_init(rocker_port);
2637 if (err) {
2638 dev_err(&pdev->dev, "port world init failed\n");
2639 goto err_world_port_init;
2640 }
2641
2642 return 0;
2643
2644 err_world_port_init:
2645 rocker->ports[port_number] = NULL;
2646 unregister_netdev(dev);
2647 err_register_netdev:
2648 rocker_world_port_post_fini(rocker_port);
2649 err_world_port_pre_init:
2650 err_world_check_init:
2651 free_netdev(dev);
2652 return err;
2653 }
2654
2655 static int rocker_probe_ports(struct rocker *rocker)
2656 {
2657 int i;
2658 size_t alloc_size;
2659 int err;
2660
2661 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2662 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2663 if (!rocker->ports)
2664 return -ENOMEM;
2665 for (i = 0; i < rocker->port_count; i++) {
2666 err = rocker_probe_port(rocker, i);
2667 if (err)
2668 goto remove_ports;
2669 }
2670 return 0;
2671
2672 remove_ports:
2673 rocker_remove_ports(rocker);
2674 return err;
2675 }
2676
2677 static int rocker_msix_init(struct rocker *rocker)
2678 {
2679 struct pci_dev *pdev = rocker->pdev;
2680 int msix_entries;
2681 int i;
2682 int err;
2683
2684 msix_entries = pci_msix_vec_count(pdev);
2685 if (msix_entries < 0)
2686 return msix_entries;
2687
2688 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2689 return -EINVAL;
2690
2691 rocker->msix_entries = kmalloc_array(msix_entries,
2692 sizeof(struct msix_entry),
2693 GFP_KERNEL);
2694 if (!rocker->msix_entries)
2695 return -ENOMEM;
2696
2697 for (i = 0; i < msix_entries; i++)
2698 rocker->msix_entries[i].entry = i;
2699
2700 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2701 if (err < 0)
2702 goto err_enable_msix;
2703
2704 return 0;
2705
2706 err_enable_msix:
2707 kfree(rocker->msix_entries);
2708 return err;
2709 }
2710
2711 static void rocker_msix_fini(const struct rocker *rocker)
2712 {
2713 pci_disable_msix(rocker->pdev);
2714 kfree(rocker->msix_entries);
2715 }
2716
2717 static bool rocker_port_dev_check(const struct net_device *dev)
2718 {
2719 return dev->netdev_ops == &rocker_port_netdev_ops;
2720 }
2721
2722 static int
2723 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2724 struct switchdev_notifier_port_attr_info *port_attr_info)
2725 {
2726 int err;
2727
2728 err = rocker_port_attr_set(netdev, port_attr_info->attr,
2729 port_attr_info->trans);
2730
2731 port_attr_info->handled = true;
2732 return notifier_from_errno(err);
2733 }
2734
2735 struct rocker_switchdev_event_work {
2736 struct work_struct work;
2737 struct switchdev_notifier_fdb_info fdb_info;
2738 struct rocker_port *rocker_port;
2739 unsigned long event;
2740 };
2741
2742 static void
2743 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2744 struct switchdev_notifier_fdb_info *recv_info)
2745 {
2746 struct switchdev_notifier_fdb_info info;
2747
2748 info.addr = recv_info->addr;
2749 info.vid = recv_info->vid;
2750 info.offloaded = true;
2751 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2752 rocker_port->dev, &info.info, NULL);
2753 }
2754
2755 static void rocker_switchdev_event_work(struct work_struct *work)
2756 {
2757 struct rocker_switchdev_event_work *switchdev_work =
2758 container_of(work, struct rocker_switchdev_event_work, work);
2759 struct rocker_port *rocker_port = switchdev_work->rocker_port;
2760 struct switchdev_notifier_fdb_info *fdb_info;
2761 int err;
2762
2763 rtnl_lock();
2764 switch (switchdev_work->event) {
2765 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2766 fdb_info = &switchdev_work->fdb_info;
2767 if (!fdb_info->added_by_user)
2768 break;
2769 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2770 if (err) {
2771 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2772 break;
2773 }
2774 rocker_fdb_offload_notify(rocker_port, fdb_info);
2775 break;
2776 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2777 fdb_info = &switchdev_work->fdb_info;
2778 if (!fdb_info->added_by_user)
2779 break;
2780 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2781 if (err)
2782 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2783 break;
2784 }
2785 rtnl_unlock();
2786
2787 kfree(switchdev_work->fdb_info.addr);
2788 kfree(switchdev_work);
2789 dev_put(rocker_port->dev);
2790 }
2791
2792 /* called under rcu_read_lock() */
2793 static int rocker_switchdev_event(struct notifier_block *unused,
2794 unsigned long event, void *ptr)
2795 {
2796 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2797 struct rocker_switchdev_event_work *switchdev_work;
2798 struct switchdev_notifier_fdb_info *fdb_info = ptr;
2799 struct rocker_port *rocker_port;
2800
2801 if (!rocker_port_dev_check(dev))
2802 return NOTIFY_DONE;
2803
2804 if (event == SWITCHDEV_PORT_ATTR_SET)
2805 return rocker_switchdev_port_attr_set_event(dev, ptr);
2806
2807 rocker_port = netdev_priv(dev);
2808 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2809 if (WARN_ON(!switchdev_work))
2810 return NOTIFY_BAD;
2811
2812 INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2813 switchdev_work->rocker_port = rocker_port;
2814 switchdev_work->event = event;
2815
2816 switch (event) {
2817 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2818 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2819 memcpy(&switchdev_work->fdb_info, ptr,
2820 sizeof(switchdev_work->fdb_info));
2821 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2822 if (unlikely(!switchdev_work->fdb_info.addr)) {
2823 kfree(switchdev_work);
2824 return NOTIFY_BAD;
2825 }
2826
2827 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2828 fdb_info->addr);
2829 /* Take a reference on the rocker device */
2830 dev_hold(dev);
2831 break;
2832 default:
2833 kfree(switchdev_work);
2834 return NOTIFY_DONE;
2835 }
2836
2837 queue_work(rocker_port->rocker->rocker_owq,
2838 &switchdev_work->work);
2839 return NOTIFY_DONE;
2840 }
2841
2842 static int
2843 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2844 struct switchdev_notifier_port_obj_info *port_obj_info)
2845 {
2846 int err = -EOPNOTSUPP;
2847
2848 switch (event) {
2849 case SWITCHDEV_PORT_OBJ_ADD:
2850 err = rocker_port_obj_add(netdev, port_obj_info->obj,
2851 port_obj_info->trans);
2852 break;
2853 case SWITCHDEV_PORT_OBJ_DEL:
2854 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2855 break;
2856 }
2857
2858 port_obj_info->handled = true;
2859 return notifier_from_errno(err);
2860 }
2861
2862 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2863 unsigned long event, void *ptr)
2864 {
2865 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2866
2867 if (!rocker_port_dev_check(dev))
2868 return NOTIFY_DONE;
2869
2870 switch (event) {
2871 case SWITCHDEV_PORT_OBJ_ADD:
2872 case SWITCHDEV_PORT_OBJ_DEL:
2873 return rocker_switchdev_port_obj_event(event, dev, ptr);
2874 case SWITCHDEV_PORT_ATTR_SET:
2875 return rocker_switchdev_port_attr_set_event(dev, ptr);
2876 }
2877
2878 return NOTIFY_DONE;
2879 }
2880
2881 static struct notifier_block rocker_switchdev_notifier = {
2882 .notifier_call = rocker_switchdev_event,
2883 };
2884
2885 static struct notifier_block rocker_switchdev_blocking_notifier = {
2886 .notifier_call = rocker_switchdev_blocking_event,
2887 };
2888
2889 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2890 {
2891 struct notifier_block *nb;
2892 struct rocker *rocker;
2893 int err;
2894
2895 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2896 if (!rocker)
2897 return -ENOMEM;
2898
2899 err = pci_enable_device(pdev);
2900 if (err) {
2901 dev_err(&pdev->dev, "pci_enable_device failed\n");
2902 goto err_pci_enable_device;
2903 }
2904
2905 err = pci_request_regions(pdev, rocker_driver_name);
2906 if (err) {
2907 dev_err(&pdev->dev, "pci_request_regions failed\n");
2908 goto err_pci_request_regions;
2909 }
2910
2911 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2912 if (!err) {
2913 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2914 if (err) {
2915 dev_err(&pdev->dev, "dma_set_coherent_mask failed\n");
2916 goto err_pci_set_dma_mask;
2917 }
2918 } else {
2919 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2920 if (err) {
2921 dev_err(&pdev->dev, "dma_set_mask failed\n");
2922 goto err_pci_set_dma_mask;
2923 }
2924 }
2925
2926 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2927 dev_err(&pdev->dev, "invalid PCI region size\n");
2928 err = -EINVAL;
2929 goto err_pci_resource_len_check;
2930 }
2931
2932 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2933 pci_resource_len(pdev, 0));
2934 if (!rocker->hw_addr) {
2935 dev_err(&pdev->dev, "ioremap failed\n");
2936 err = -EIO;
2937 goto err_ioremap;
2938 }
2939 pci_set_master(pdev);
2940
2941 rocker->pdev = pdev;
2942 pci_set_drvdata(pdev, rocker);
2943
2944 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2945
2946 err = rocker_msix_init(rocker);
2947 if (err) {
2948 dev_err(&pdev->dev, "MSI-X init failed\n");
2949 goto err_msix_init;
2950 }
2951
2952 err = rocker_basic_hw_test(rocker);
2953 if (err) {
2954 dev_err(&pdev->dev, "basic hw test failed\n");
2955 goto err_basic_hw_test;
2956 }
2957
2958 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2959
2960 err = rocker_dma_rings_init(rocker);
2961 if (err)
2962 goto err_dma_rings_init;
2963
2964 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2965 rocker_cmd_irq_handler, 0,
2966 rocker_driver_name, rocker);
2967 if (err) {
2968 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2969 goto err_request_cmd_irq;
2970 }
2971
2972 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2973 rocker_event_irq_handler, 0,
2974 rocker_driver_name, rocker);
2975 if (err) {
2976 dev_err(&pdev->dev, "cannot assign event irq\n");
2977 goto err_request_event_irq;
2978 }
2979
2980 rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2981 WQ_MEM_RECLAIM);
2982 if (!rocker->rocker_owq) {
2983 err = -ENOMEM;
2984 goto err_alloc_ordered_workqueue;
2985 }
2986
2987 err = rocker_probe_ports(rocker);
2988 if (err) {
2989 dev_err(&pdev->dev, "failed to probe ports\n");
2990 goto err_probe_ports;
2991 }
2992
2993 /* Only FIBs pointing to our own netdevs are programmed into
2994 * the device, so no need to pass a callback.
2995 */
2996 rocker->fib_nb.notifier_call = rocker_router_fib_event;
2997 err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2998 if (err)
2999 goto err_register_fib_notifier;
3000
3001 err = register_switchdev_notifier(&rocker_switchdev_notifier);
3002 if (err) {
3003 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
3004 goto err_register_switchdev_notifier;
3005 }
3006
3007 nb = &rocker_switchdev_blocking_notifier;
3008 err = register_switchdev_blocking_notifier(nb);
3009 if (err) {
3010 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
3011 goto err_register_switchdev_blocking_notifier;
3012 }
3013
3014 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
3015
3016 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
3017 (int)sizeof(rocker->hw.id), &rocker->hw.id);
3018
3019 return 0;
3020
3021 err_register_switchdev_blocking_notifier:
3022 unregister_switchdev_notifier(&rocker_switchdev_notifier);
3023 err_register_switchdev_notifier:
3024 unregister_fib_notifier(&init_net, &rocker->fib_nb);
3025 err_register_fib_notifier:
3026 rocker_remove_ports(rocker);
3027 err_probe_ports:
3028 destroy_workqueue(rocker->rocker_owq);
3029 err_alloc_ordered_workqueue:
3030 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3031 err_request_event_irq:
3032 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3033 err_request_cmd_irq:
3034 rocker_dma_rings_fini(rocker);
3035 err_dma_rings_init:
3036 err_basic_hw_test:
3037 rocker_msix_fini(rocker);
3038 err_msix_init:
3039 iounmap(rocker->hw_addr);
3040 err_ioremap:
3041 err_pci_resource_len_check:
3042 err_pci_set_dma_mask:
3043 pci_release_regions(pdev);
3044 err_pci_request_regions:
3045 pci_disable_device(pdev);
3046 err_pci_enable_device:
3047 kfree(rocker);
3048 return err;
3049 }
3050
3051 static void rocker_remove(struct pci_dev *pdev)
3052 {
3053 struct rocker *rocker = pci_get_drvdata(pdev);
3054 struct notifier_block *nb;
3055
3056 nb = &rocker_switchdev_blocking_notifier;
3057 unregister_switchdev_blocking_notifier(nb);
3058
3059 unregister_switchdev_notifier(&rocker_switchdev_notifier);
3060 unregister_fib_notifier(&init_net, &rocker->fib_nb);
3061 rocker_remove_ports(rocker);
3062 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3063 destroy_workqueue(rocker->rocker_owq);
3064 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3065 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3066 rocker_dma_rings_fini(rocker);
3067 rocker_msix_fini(rocker);
3068 iounmap(rocker->hw_addr);
3069 pci_release_regions(rocker->pdev);
3070 pci_disable_device(rocker->pdev);
3071 kfree(rocker);
3072 }
3073
3074 static struct pci_driver rocker_pci_driver = {
3075 .name = rocker_driver_name,
3076 .id_table = rocker_pci_id_table,
3077 .probe = rocker_probe,
3078 .remove = rocker_remove,
3079 };
3080
3081 /************************************
3082 * Net device notifier event handler
3083 ************************************/
3084
3085 static bool rocker_port_dev_check_under(const struct net_device *dev,
3086 struct rocker *rocker)
3087 {
3088 struct rocker_port *rocker_port;
3089
3090 if (!rocker_port_dev_check(dev))
3091 return false;
3092
3093 rocker_port = netdev_priv(dev);
3094 if (rocker_port->rocker != rocker)
3095 return false;
3096
3097 return true;
3098 }
3099
3100 struct rocker_walk_data {
3101 struct rocker *rocker;
3102 struct rocker_port *port;
3103 };
3104
3105 static int rocker_lower_dev_walk(struct net_device *lower_dev,
3106 struct netdev_nested_priv *priv)
3107 {
3108 struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3109 int ret = 0;
3110
3111 if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3112 data->port = netdev_priv(lower_dev);
3113 ret = 1;
3114 }
3115
3116 return ret;
3117 }
3118
3119 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3120 struct rocker *rocker)
3121 {
3122 struct netdev_nested_priv priv;
3123 struct rocker_walk_data data;
3124
3125 if (rocker_port_dev_check_under(dev, rocker))
3126 return netdev_priv(dev);
3127
3128 data.rocker = rocker;
3129 data.port = NULL;
3130 priv.data = (void *)&data;
3131 netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3132
3133 return data.port;
3134 }
3135
3136 static int rocker_netdevice_event(struct notifier_block *unused,
3137 unsigned long event, void *ptr)
3138 {
3139 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3140 struct netdev_notifier_changeupper_info *info;
3141 struct rocker_port *rocker_port;
3142 int err;
3143
3144 if (!rocker_port_dev_check(dev))
3145 return NOTIFY_DONE;
3146
3147 switch (event) {
3148 case NETDEV_CHANGEUPPER:
3149 info = ptr;
3150 if (!info->master)
3151 goto out;
3152 rocker_port = netdev_priv(dev);
3153 if (info->linking) {
3154 err = rocker_world_port_master_linked(rocker_port,
3155 info->upper_dev);
3156 if (err)
3157 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3158 err);
3159 } else {
3160 err = rocker_world_port_master_unlinked(rocker_port,
3161 info->upper_dev);
3162 if (err)
3163 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3164 err);
3165 }
3166 }
3167 out:
3168 return NOTIFY_DONE;
3169 }
3170
3171 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3172 .notifier_call = rocker_netdevice_event,
3173 };
3174
3175 /************************************
3176 * Net event notifier event handler
3177 ************************************/
3178
3179 static int rocker_netevent_event(struct notifier_block *unused,
3180 unsigned long event, void *ptr)
3181 {
3182 struct rocker_port *rocker_port;
3183 struct net_device *dev;
3184 struct neighbour *n = ptr;
3185 int err;
3186
3187 switch (event) {
3188 case NETEVENT_NEIGH_UPDATE:
3189 if (n->tbl != &arp_tbl)
3190 return NOTIFY_DONE;
3191 dev = n->dev;
3192 if (!rocker_port_dev_check(dev))
3193 return NOTIFY_DONE;
3194 rocker_port = netdev_priv(dev);
3195 err = rocker_world_port_neigh_update(rocker_port, n);
3196 if (err)
3197 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3198 err);
3199 break;
3200 }
3201
3202 return NOTIFY_DONE;
3203 }
3204
3205 static struct notifier_block rocker_netevent_nb __read_mostly = {
3206 .notifier_call = rocker_netevent_event,
3207 };
3208
3209 /***********************
3210 * Module init and exit
3211 ***********************/
3212
3213 static int __init rocker_module_init(void)
3214 {
3215 int err;
3216
3217 register_netdevice_notifier(&rocker_netdevice_nb);
3218 register_netevent_notifier(&rocker_netevent_nb);
3219 err = pci_register_driver(&rocker_pci_driver);
3220 if (err)
3221 goto err_pci_register_driver;
3222 return 0;
3223
3224 err_pci_register_driver:
3225 unregister_netevent_notifier(&rocker_netevent_nb);
3226 unregister_netdevice_notifier(&rocker_netdevice_nb);
3227 return err;
3228 }
3229
3230 static void __exit rocker_module_exit(void)
3231 {
3232 unregister_netevent_notifier(&rocker_netevent_nb);
3233 unregister_netdevice_notifier(&rocker_netdevice_nb);
3234 pci_unregister_driver(&rocker_pci_driver);
3235 }
3236
3237 module_init(rocker_module_init);
3238 module_exit(rocker_module_exit);
3239
3240 MODULE_LICENSE("GPL v2");
3241 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3242 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3243 MODULE_DESCRIPTION("Rocker switch device driver");
3244 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
Linux with added FPC-III support