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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / ethernet / rocker / rocker_main.c
blob056cb60936303563ac835a8a450e29566cd2bb86
1 /*
2 * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
3 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
4 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/interrupt.h>
16 #include <linux/sched.h>
17 #include <linux/wait.h>
18 #include <linux/spinlock.h>
19 #include <linux/sort.h>
20 #include <linux/random.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/socket.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/if_bridge.h>
29 #include <linux/bitops.h>
30 #include <linux/ctype.h>
31 #include <linux/workqueue.h>
32 #include <net/switchdev.h>
33 #include <net/rtnetlink.h>
34 #include <net/netevent.h>
35 #include <net/arp.h>
36 #include <net/fib_rules.h>
37 #include <net/fib_notifier.h>
38 #include <linux/io-64-nonatomic-lo-hi.h>
39 #include <generated/utsrelease.h>
40
41 #include "rocker_hw.h"
42 #include "rocker.h"
43 #include "rocker_tlv.h"
44
45 static const char rocker_driver_name[] = "rocker";
46
47 static const struct pci_device_id rocker_pci_id_table[] = {
48 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
49 {0, }
50 };
51
52 struct rocker_wait {
53 wait_queue_head_t wait;
54 bool done;
55 bool nowait;
56 };
57
58 static void rocker_wait_reset(struct rocker_wait *wait)
59 {
60 wait->done = false;
61 wait->nowait = false;
62 }
63
64 static void rocker_wait_init(struct rocker_wait *wait)
65 {
66 init_waitqueue_head(&wait->wait);
67 rocker_wait_reset(wait);
68 }
69
70 static struct rocker_wait *rocker_wait_create(void)
71 {
72 struct rocker_wait *wait;
73
74 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
75 if (!wait)
76 return NULL;
77 return wait;
78 }
79
80 static void rocker_wait_destroy(struct rocker_wait *wait)
81 {
82 kfree(wait);
83 }
84
85 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
86 unsigned long timeout)
87 {
88 wait_event_timeout(wait->wait, wait->done, HZ / 10);
89 if (!wait->done)
90 return false;
91 return true;
92 }
93
94 static void rocker_wait_wake_up(struct rocker_wait *wait)
95 {
96 wait->done = true;
97 wake_up(&wait->wait);
98 }
99
100 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
101 {
102 return rocker->msix_entries[vector].vector;
103 }
104
105 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
106 {
107 return rocker_msix_vector(rocker_port->rocker,
108 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
109 }
110
111 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
112 {
113 return rocker_msix_vector(rocker_port->rocker,
114 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
115 }
116
117 #define rocker_write32(rocker, reg, val) \
118 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119 #define rocker_read32(rocker, reg) \
120 readl((rocker)->hw_addr + (ROCKER_ ## reg))
121 #define rocker_write64(rocker, reg, val) \
122 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
123 #define rocker_read64(rocker, reg) \
124 readq((rocker)->hw_addr + (ROCKER_ ## reg))
125
126 /*****************************
127 * HW basic testing functions
128 *****************************/
129
130 static int rocker_reg_test(const struct rocker *rocker)
131 {
132 const struct pci_dev *pdev = rocker->pdev;
133 u64 test_reg;
134 u64 rnd;
135
136 rnd = prandom_u32();
137 rnd >>= 1;
138 rocker_write32(rocker, TEST_REG, rnd);
139 test_reg = rocker_read32(rocker, TEST_REG);
140 if (test_reg != rnd * 2) {
141 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
142 test_reg, rnd * 2);
143 return -EIO;
144 }
145
146 rnd = prandom_u32();
147 rnd <<= 31;
148 rnd |= prandom_u32();
149 rocker_write64(rocker, TEST_REG64, rnd);
150 test_reg = rocker_read64(rocker, TEST_REG64);
151 if (test_reg != rnd * 2) {
152 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
153 test_reg, rnd * 2);
154 return -EIO;
155 }
156
157 return 0;
158 }
159
160 static int rocker_dma_test_one(const struct rocker *rocker,
161 struct rocker_wait *wait, u32 test_type,
162 dma_addr_t dma_handle, const unsigned char *buf,
163 const unsigned char *expect, size_t size)
164 {
165 const struct pci_dev *pdev = rocker->pdev;
166 int i;
167
168 rocker_wait_reset(wait);
169 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
170
171 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
172 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
173 return -EIO;
174 }
175
176 for (i = 0; i < size; i++) {
177 if (buf[i] != expect[i]) {
178 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
179 buf[i], i, expect[i]);
180 return -EIO;
181 }
182 }
183 return 0;
184 }
185
186 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
187 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
188
189 static int rocker_dma_test_offset(const struct rocker *rocker,
190 struct rocker_wait *wait, int offset)
191 {
192 struct pci_dev *pdev = rocker->pdev;
193 unsigned char *alloc;
194 unsigned char *buf;
195 unsigned char *expect;
196 dma_addr_t dma_handle;
197 int i;
198 int err;
199
200 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
201 GFP_KERNEL | GFP_DMA);
202 if (!alloc)
203 return -ENOMEM;
204 buf = alloc + offset;
205 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
206
207 dma_handle = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
208 PCI_DMA_BIDIRECTIONAL);
209 if (pci_dma_mapping_error(pdev, dma_handle)) {
210 err = -EIO;
211 goto free_alloc;
212 }
213
214 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
215 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
216
217 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
218 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
219 dma_handle, buf, expect,
220 ROCKER_TEST_DMA_BUF_SIZE);
221 if (err)
222 goto unmap;
223
224 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
225 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
226 dma_handle, buf, expect,
227 ROCKER_TEST_DMA_BUF_SIZE);
228 if (err)
229 goto unmap;
230
231 prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
232 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
233 expect[i] = ~buf[i];
234 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
235 dma_handle, buf, expect,
236 ROCKER_TEST_DMA_BUF_SIZE);
237 if (err)
238 goto unmap;
239
240 unmap:
241 pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
242 PCI_DMA_BIDIRECTIONAL);
243 free_alloc:
244 kfree(alloc);
245
246 return err;
247 }
248
249 static int rocker_dma_test(const struct rocker *rocker,
250 struct rocker_wait *wait)
251 {
252 int i;
253 int err;
254
255 for (i = 0; i < 8; i++) {
256 err = rocker_dma_test_offset(rocker, wait, i);
257 if (err)
258 return err;
259 }
260 return 0;
261 }
262
263 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
264 {
265 struct rocker_wait *wait = dev_id;
266
267 rocker_wait_wake_up(wait);
268
269 return IRQ_HANDLED;
270 }
271
272 static int rocker_basic_hw_test(const struct rocker *rocker)
273 {
274 const struct pci_dev *pdev = rocker->pdev;
275 struct rocker_wait wait;
276 int err;
277
278 err = rocker_reg_test(rocker);
279 if (err) {
280 dev_err(&pdev->dev, "reg test failed\n");
281 return err;
282 }
283
284 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
285 rocker_test_irq_handler, 0,
286 rocker_driver_name, &wait);
287 if (err) {
288 dev_err(&pdev->dev, "cannot assign test irq\n");
289 return err;
290 }
291
292 rocker_wait_init(&wait);
293 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
294
295 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
296 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
297 err = -EIO;
298 goto free_irq;
299 }
300
301 err = rocker_dma_test(rocker, &wait);
302 if (err)
303 dev_err(&pdev->dev, "dma test failed\n");
304
305 free_irq:
306 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
307 return err;
308 }
309
310 /******************************************
311 * DMA rings and descriptors manipulations
312 ******************************************/
313
314 static u32 __pos_inc(u32 pos, size_t limit)
315 {
316 return ++pos == limit ? 0 : pos;
317 }
318
319 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
320 {
321 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
322
323 switch (err) {
324 case ROCKER_OK:
325 return 0;
326 case -ROCKER_ENOENT:
327 return -ENOENT;
328 case -ROCKER_ENXIO:
329 return -ENXIO;
330 case -ROCKER_ENOMEM:
331 return -ENOMEM;
332 case -ROCKER_EEXIST:
333 return -EEXIST;
334 case -ROCKER_EINVAL:
335 return -EINVAL;
336 case -ROCKER_EMSGSIZE:
337 return -EMSGSIZE;
338 case -ROCKER_ENOTSUP:
339 return -EOPNOTSUPP;
340 case -ROCKER_ENOBUFS:
341 return -ENOBUFS;
342 }
343
344 return -EINVAL;
345 }
346
347 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
348 {
349 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
350 }
351
352 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
353 {
354 u32 comp_err = desc_info->desc->comp_err;
355
356 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
357 }
358
359 static void *
360 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
361 {
362 return (void *)(uintptr_t)desc_info->desc->cookie;
363 }
364
365 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
366 void *ptr)
367 {
368 desc_info->desc->cookie = (uintptr_t) ptr;
369 }
370
371 static struct rocker_desc_info *
372 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
373 {
374 static struct rocker_desc_info *desc_info;
375 u32 head = __pos_inc(info->head, info->size);
376
377 desc_info = &info->desc_info[info->head];
378 if (head == info->tail)
379 return NULL; /* ring full */
380 desc_info->tlv_size = 0;
381 return desc_info;
382 }
383
384 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
385 {
386 desc_info->desc->buf_size = desc_info->data_size;
387 desc_info->desc->tlv_size = desc_info->tlv_size;
388 }
389
390 static void rocker_desc_head_set(const struct rocker *rocker,
391 struct rocker_dma_ring_info *info,
392 const struct rocker_desc_info *desc_info)
393 {
394 u32 head = __pos_inc(info->head, info->size);
395
396 BUG_ON(head == info->tail);
397 rocker_desc_commit(desc_info);
398 info->head = head;
399 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
400 }
401
402 static struct rocker_desc_info *
403 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
404 {
405 static struct rocker_desc_info *desc_info;
406
407 if (info->tail == info->head)
408 return NULL; /* nothing to be done between head and tail */
409 desc_info = &info->desc_info[info->tail];
410 if (!rocker_desc_gen(desc_info))
411 return NULL; /* gen bit not set, desc is not ready yet */
412 info->tail = __pos_inc(info->tail, info->size);
413 desc_info->tlv_size = desc_info->desc->tlv_size;
414 return desc_info;
415 }
416
417 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
418 const struct rocker_dma_ring_info *info,
419 u32 credits)
420 {
421 if (credits)
422 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
423 }
424
425 static unsigned long rocker_dma_ring_size_fix(size_t size)
426 {
427 return max(ROCKER_DMA_SIZE_MIN,
428 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
429 }
430
431 static int rocker_dma_ring_create(const struct rocker *rocker,
432 unsigned int type,
433 size_t size,
434 struct rocker_dma_ring_info *info)
435 {
436 int i;
437
438 BUG_ON(size != rocker_dma_ring_size_fix(size));
439 info->size = size;
440 info->type = type;
441 info->head = 0;
442 info->tail = 0;
443 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
444 GFP_KERNEL);
445 if (!info->desc_info)
446 return -ENOMEM;
447
448 info->desc = pci_alloc_consistent(rocker->pdev,
449 info->size * sizeof(*info->desc),
450 &info->mapaddr);
451 if (!info->desc) {
452 kfree(info->desc_info);
453 return -ENOMEM;
454 }
455
456 for (i = 0; i < info->size; i++)
457 info->desc_info[i].desc = &info->desc[i];
458
459 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
460 ROCKER_DMA_DESC_CTRL_RESET);
461 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
462 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
463
464 return 0;
465 }
466
467 static void rocker_dma_ring_destroy(const struct rocker *rocker,
468 const struct rocker_dma_ring_info *info)
469 {
470 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
471
472 pci_free_consistent(rocker->pdev,
473 info->size * sizeof(struct rocker_desc),
474 info->desc, info->mapaddr);
475 kfree(info->desc_info);
476 }
477
478 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
479 struct rocker_dma_ring_info *info)
480 {
481 int i;
482
483 BUG_ON(info->head || info->tail);
484
485 /* When ring is consumer, we need to advance head for each desc.
486 * That tells hw that the desc is ready to be used by it.
487 */
488 for (i = 0; i < info->size - 1; i++)
489 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
490 rocker_desc_commit(&info->desc_info[i]);
491 }
492
493 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
494 const struct rocker_dma_ring_info *info,
495 int direction, size_t buf_size)
496 {
497 struct pci_dev *pdev = rocker->pdev;
498 int i;
499 int err;
500
501 for (i = 0; i < info->size; i++) {
502 struct rocker_desc_info *desc_info = &info->desc_info[i];
503 struct rocker_desc *desc = &info->desc[i];
504 dma_addr_t dma_handle;
505 char *buf;
506
507 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
508 if (!buf) {
509 err = -ENOMEM;
510 goto rollback;
511 }
512
513 dma_handle = pci_map_single(pdev, buf, buf_size, direction);
514 if (pci_dma_mapping_error(pdev, dma_handle)) {
515 kfree(buf);
516 err = -EIO;
517 goto rollback;
518 }
519
520 desc_info->data = buf;
521 desc_info->data_size = buf_size;
522 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
523
524 desc->buf_addr = dma_handle;
525 desc->buf_size = buf_size;
526 }
527 return 0;
528
529 rollback:
530 for (i--; i >= 0; i--) {
531 const struct rocker_desc_info *desc_info = &info->desc_info[i];
532
533 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
534 desc_info->data_size, direction);
535 kfree(desc_info->data);
536 }
537 return err;
538 }
539
540 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
541 const struct rocker_dma_ring_info *info,
542 int direction)
543 {
544 struct pci_dev *pdev = rocker->pdev;
545 int i;
546
547 for (i = 0; i < info->size; i++) {
548 const struct rocker_desc_info *desc_info = &info->desc_info[i];
549 struct rocker_desc *desc = &info->desc[i];
550
551 desc->buf_addr = 0;
552 desc->buf_size = 0;
553 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
554 desc_info->data_size, direction);
555 kfree(desc_info->data);
556 }
557 }
558
559 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
560 {
561 struct rocker_wait *wait;
562
563 wait = rocker_wait_create();
564 if (!wait)
565 return -ENOMEM;
566 rocker_desc_cookie_ptr_set(desc_info, wait);
567 return 0;
568 }
569
570 static void
571 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
572 {
573 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
574
575 rocker_wait_destroy(wait);
576 }
577
578 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
579 {
580 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
581 int i;
582 int err;
583
584 for (i = 0; i < cmd_ring->size; i++) {
585 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
586 if (err)
587 goto rollback;
588 }
589 return 0;
590
591 rollback:
592 for (i--; i >= 0; i--)
593 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
594 return err;
595 }
596
597 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
598 {
599 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
600 int i;
601
602 for (i = 0; i < cmd_ring->size; i++)
603 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
604 }
605
606 static int rocker_dma_rings_init(struct rocker *rocker)
607 {
608 const struct pci_dev *pdev = rocker->pdev;
609 int err;
610
611 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
612 ROCKER_DMA_CMD_DEFAULT_SIZE,
613 &rocker->cmd_ring);
614 if (err) {
615 dev_err(&pdev->dev, "failed to create command dma ring\n");
616 return err;
617 }
618
619 spin_lock_init(&rocker->cmd_ring_lock);
620
621 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
622 PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
623 if (err) {
624 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
625 goto err_dma_cmd_ring_bufs_alloc;
626 }
627
628 err = rocker_dma_cmd_ring_waits_alloc(rocker);
629 if (err) {
630 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
631 goto err_dma_cmd_ring_waits_alloc;
632 }
633
634 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
635 ROCKER_DMA_EVENT_DEFAULT_SIZE,
636 &rocker->event_ring);
637 if (err) {
638 dev_err(&pdev->dev, "failed to create event dma ring\n");
639 goto err_dma_event_ring_create;
640 }
641
642 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
643 PCI_DMA_FROMDEVICE, PAGE_SIZE);
644 if (err) {
645 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
646 goto err_dma_event_ring_bufs_alloc;
647 }
648 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
649 return 0;
650
651 err_dma_event_ring_bufs_alloc:
652 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
653 err_dma_event_ring_create:
654 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
655 PCI_DMA_BIDIRECTIONAL);
656 err_dma_cmd_ring_waits_alloc:
657 rocker_dma_cmd_ring_waits_free(rocker);
658 err_dma_cmd_ring_bufs_alloc:
659 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
660 return err;
661 }
662
663 static void rocker_dma_rings_fini(struct rocker *rocker)
664 {
665 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
666 PCI_DMA_BIDIRECTIONAL);
667 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
668 rocker_dma_cmd_ring_waits_free(rocker);
669 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
670 PCI_DMA_BIDIRECTIONAL);
671 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
672 }
673
674 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
675 struct rocker_desc_info *desc_info,
676 struct sk_buff *skb, size_t buf_len)
677 {
678 const struct rocker *rocker = rocker_port->rocker;
679 struct pci_dev *pdev = rocker->pdev;
680 dma_addr_t dma_handle;
681
682 dma_handle = pci_map_single(pdev, skb->data, buf_len,
683 PCI_DMA_FROMDEVICE);
684 if (pci_dma_mapping_error(pdev, dma_handle))
685 return -EIO;
686 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
687 goto tlv_put_failure;
688 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
689 goto tlv_put_failure;
690 return 0;
691
692 tlv_put_failure:
693 pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
694 desc_info->tlv_size = 0;
695 return -EMSGSIZE;
696 }
697
698 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
699 {
700 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
701 }
702
703 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
704 struct rocker_desc_info *desc_info)
705 {
706 struct net_device *dev = rocker_port->dev;
707 struct sk_buff *skb;
708 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
709 int err;
710
711 /* Ensure that hw will see tlv_size zero in case of an error.
712 * That tells hw to use another descriptor.
713 */
714 rocker_desc_cookie_ptr_set(desc_info, NULL);
715 desc_info->tlv_size = 0;
716
717 skb = netdev_alloc_skb_ip_align(dev, buf_len);
718 if (!skb)
719 return -ENOMEM;
720 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
721 if (err) {
722 dev_kfree_skb_any(skb);
723 return err;
724 }
725 rocker_desc_cookie_ptr_set(desc_info, skb);
726 return 0;
727 }
728
729 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
730 const struct rocker_tlv **attrs)
731 {
732 struct pci_dev *pdev = rocker->pdev;
733 dma_addr_t dma_handle;
734 size_t len;
735
736 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
737 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
738 return;
739 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
740 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
741 pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
742 }
743
744 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
745 const struct rocker_desc_info *desc_info)
746 {
747 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
748 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
749
750 if (!skb)
751 return;
752 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
753 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
754 dev_kfree_skb_any(skb);
755 }
756
757 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
758 {
759 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
760 const struct rocker *rocker = rocker_port->rocker;
761 int i;
762 int err;
763
764 for (i = 0; i < rx_ring->size; i++) {
765 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
766 &rx_ring->desc_info[i]);
767 if (err)
768 goto rollback;
769 }
770 return 0;
771
772 rollback:
773 for (i--; i >= 0; i--)
774 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
775 return err;
776 }
777
778 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
779 {
780 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
781 const struct rocker *rocker = rocker_port->rocker;
782 int i;
783
784 for (i = 0; i < rx_ring->size; i++)
785 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
786 }
787
788 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
789 {
790 struct rocker *rocker = rocker_port->rocker;
791 int err;
792
793 err = rocker_dma_ring_create(rocker,
794 ROCKER_DMA_TX(rocker_port->port_number),
795 ROCKER_DMA_TX_DEFAULT_SIZE,
796 &rocker_port->tx_ring);
797 if (err) {
798 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
799 return err;
800 }
801
802 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
803 PCI_DMA_TODEVICE,
804 ROCKER_DMA_TX_DESC_SIZE);
805 if (err) {
806 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
807 goto err_dma_tx_ring_bufs_alloc;
808 }
809
810 err = rocker_dma_ring_create(rocker,
811 ROCKER_DMA_RX(rocker_port->port_number),
812 ROCKER_DMA_RX_DEFAULT_SIZE,
813 &rocker_port->rx_ring);
814 if (err) {
815 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
816 goto err_dma_rx_ring_create;
817 }
818
819 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
820 PCI_DMA_BIDIRECTIONAL,
821 ROCKER_DMA_RX_DESC_SIZE);
822 if (err) {
823 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
824 goto err_dma_rx_ring_bufs_alloc;
825 }
826
827 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
828 if (err) {
829 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
830 goto err_dma_rx_ring_skbs_alloc;
831 }
832 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
833
834 return 0;
835
836 err_dma_rx_ring_skbs_alloc:
837 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
838 PCI_DMA_BIDIRECTIONAL);
839 err_dma_rx_ring_bufs_alloc:
840 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
841 err_dma_rx_ring_create:
842 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
843 PCI_DMA_TODEVICE);
844 err_dma_tx_ring_bufs_alloc:
845 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
846 return err;
847 }
848
849 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
850 {
851 struct rocker *rocker = rocker_port->rocker;
852
853 rocker_dma_rx_ring_skbs_free(rocker_port);
854 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
855 PCI_DMA_BIDIRECTIONAL);
856 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
857 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
858 PCI_DMA_TODEVICE);
859 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
860 }
861
862 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
863 bool enable)
864 {
865 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
866
867 if (enable)
868 val |= 1ULL << rocker_port->pport;
869 else
870 val &= ~(1ULL << rocker_port->pport);
871 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
872 }
873
874 /********************************
875 * Interrupt handler and helpers
876 ********************************/
877
878 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
879 {
880 struct rocker *rocker = dev_id;
881 const struct rocker_desc_info *desc_info;
882 struct rocker_wait *wait;
883 u32 credits = 0;
884
885 spin_lock(&rocker->cmd_ring_lock);
886 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
887 wait = rocker_desc_cookie_ptr_get(desc_info);
888 if (wait->nowait) {
889 rocker_desc_gen_clear(desc_info);
890 } else {
891 rocker_wait_wake_up(wait);
892 }
893 credits++;
894 }
895 spin_unlock(&rocker->cmd_ring_lock);
896 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
897
898 return IRQ_HANDLED;
899 }
900
901 static void rocker_port_link_up(const struct rocker_port *rocker_port)
902 {
903 netif_carrier_on(rocker_port->dev);
904 netdev_info(rocker_port->dev, "Link is up\n");
905 }
906
907 static void rocker_port_link_down(const struct rocker_port *rocker_port)
908 {
909 netif_carrier_off(rocker_port->dev);
910 netdev_info(rocker_port->dev, "Link is down\n");
911 }
912
913 static int rocker_event_link_change(const struct rocker *rocker,
914 const struct rocker_tlv *info)
915 {
916 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
917 unsigned int port_number;
918 bool link_up;
919 struct rocker_port *rocker_port;
920
921 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
922 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
923 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
924 return -EIO;
925 port_number =
926 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
927 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
928
929 if (port_number >= rocker->port_count)
930 return -EINVAL;
931
932 rocker_port = rocker->ports[port_number];
933 if (netif_carrier_ok(rocker_port->dev) != link_up) {
934 if (link_up)
935 rocker_port_link_up(rocker_port);
936 else
937 rocker_port_link_down(rocker_port);
938 }
939
940 return 0;
941 }
942
943 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
944 const unsigned char *addr,
945 __be16 vlan_id);
946
947 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
948 const struct rocker_tlv *info)
949 {
950 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
951 unsigned int port_number;
952 struct rocker_port *rocker_port;
953 const unsigned char *addr;
954 __be16 vlan_id;
955
956 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
957 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
958 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
959 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
960 return -EIO;
961 port_number =
962 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
963 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
964 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
965
966 if (port_number >= rocker->port_count)
967 return -EINVAL;
968
969 rocker_port = rocker->ports[port_number];
970 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
971 }
972
973 static int rocker_event_process(const struct rocker *rocker,
974 const struct rocker_desc_info *desc_info)
975 {
976 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
977 const struct rocker_tlv *info;
978 u16 type;
979
980 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
981 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
982 !attrs[ROCKER_TLV_EVENT_INFO])
983 return -EIO;
984
985 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
986 info = attrs[ROCKER_TLV_EVENT_INFO];
987
988 switch (type) {
989 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
990 return rocker_event_link_change(rocker, info);
991 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
992 return rocker_event_mac_vlan_seen(rocker, info);
993 }
994
995 return -EOPNOTSUPP;
996 }
997
998 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
999 {
1000 struct rocker *rocker = dev_id;
1001 const struct pci_dev *pdev = rocker->pdev;
1002 const struct rocker_desc_info *desc_info;
1003 u32 credits = 0;
1004 int err;
1005
1006 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1007 err = rocker_desc_err(desc_info);
1008 if (err) {
1009 dev_err(&pdev->dev, "event desc received with err %d\n",
1010 err);
1011 } else {
1012 err = rocker_event_process(rocker, desc_info);
1013 if (err)
1014 dev_err(&pdev->dev, "event processing failed with err %d\n",
1015 err);
1016 }
1017 rocker_desc_gen_clear(desc_info);
1018 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1019 credits++;
1020 }
1021 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1022
1023 return IRQ_HANDLED;
1024 }
1025
1026 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1027 {
1028 struct rocker_port *rocker_port = dev_id;
1029
1030 napi_schedule(&rocker_port->napi_tx);
1031 return IRQ_HANDLED;
1032 }
1033
1034 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1035 {
1036 struct rocker_port *rocker_port = dev_id;
1037
1038 napi_schedule(&rocker_port->napi_rx);
1039 return IRQ_HANDLED;
1040 }
1041
1042 /********************
1043 * Command interface
1044 ********************/
1045
1046 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1047 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1048 rocker_cmd_proc_cb_t process, void *process_priv)
1049 {
1050 struct rocker *rocker = rocker_port->rocker;
1051 struct rocker_desc_info *desc_info;
1052 struct rocker_wait *wait;
1053 unsigned long lock_flags;
1054 int err;
1055
1056 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1057
1058 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1059 if (!desc_info) {
1060 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1061 return -EAGAIN;
1062 }
1063
1064 wait = rocker_desc_cookie_ptr_get(desc_info);
1065 rocker_wait_init(wait);
1066 wait->nowait = nowait;
1067
1068 err = prepare(rocker_port, desc_info, prepare_priv);
1069 if (err) {
1070 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1071 return err;
1072 }
1073
1074 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1075
1076 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1077
1078 if (nowait)
1079 return 0;
1080
1081 if (!rocker_wait_event_timeout(wait, HZ / 10))
1082 return -EIO;
1083
1084 err = rocker_desc_err(desc_info);
1085 if (err)
1086 return err;
1087
1088 if (process)
1089 err = process(rocker_port, desc_info, process_priv);
1090
1091 rocker_desc_gen_clear(desc_info);
1092 return err;
1093 }
1094
1095 static int
1096 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1097 struct rocker_desc_info *desc_info,
1098 void *priv)
1099 {
1100 struct rocker_tlv *cmd_info;
1101
1102 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1103 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1104 return -EMSGSIZE;
1105 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1106 if (!cmd_info)
1107 return -EMSGSIZE;
1108 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1109 rocker_port->pport))
1110 return -EMSGSIZE;
1111 rocker_tlv_nest_end(desc_info, cmd_info);
1112 return 0;
1113 }
1114
1115 static int
1116 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1117 const struct rocker_desc_info *desc_info,
1118 void *priv)
1119 {
1120 struct ethtool_link_ksettings *ecmd = priv;
1121 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1122 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1123 u32 speed;
1124 u8 duplex;
1125 u8 autoneg;
1126
1127 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1128 if (!attrs[ROCKER_TLV_CMD_INFO])
1129 return -EIO;
1130
1131 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1132 attrs[ROCKER_TLV_CMD_INFO]);
1133 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1134 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1135 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1136 return -EIO;
1137
1138 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1139 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1140 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1141
1142 ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1143 ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1144
1145 ecmd->base.phy_address = 0xff;
1146 ecmd->base.port = PORT_TP;
1147 ecmd->base.speed = speed;
1148 ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1149 ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1150
1151 return 0;
1152 }
1153
1154 static int
1155 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1156 const struct rocker_desc_info *desc_info,
1157 void *priv)
1158 {
1159 unsigned char *macaddr = priv;
1160 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1161 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1162 const struct rocker_tlv *attr;
1163
1164 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1165 if (!attrs[ROCKER_TLV_CMD_INFO])
1166 return -EIO;
1167
1168 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1169 attrs[ROCKER_TLV_CMD_INFO]);
1170 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1171 if (!attr)
1172 return -EIO;
1173
1174 if (rocker_tlv_len(attr) != ETH_ALEN)
1175 return -EINVAL;
1176
1177 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1178 return 0;
1179 }
1180
1181 static int
1182 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1183 const struct rocker_desc_info *desc_info,
1184 void *priv)
1185 {
1186 u8 *p_mode = priv;
1187 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1188 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1189 const struct rocker_tlv *attr;
1190
1191 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1192 if (!attrs[ROCKER_TLV_CMD_INFO])
1193 return -EIO;
1194
1195 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1196 attrs[ROCKER_TLV_CMD_INFO]);
1197 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1198 if (!attr)
1199 return -EIO;
1200
1201 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1202 return 0;
1203 }
1204
1205 struct port_name {
1206 char *buf;
1207 size_t len;
1208 };
1209
1210 static int
1211 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1212 const struct rocker_desc_info *desc_info,
1213 void *priv)
1214 {
1215 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1216 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1217 struct port_name *name = priv;
1218 const struct rocker_tlv *attr;
1219 size_t i, j, len;
1220 const char *str;
1221
1222 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1223 if (!attrs[ROCKER_TLV_CMD_INFO])
1224 return -EIO;
1225
1226 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1227 attrs[ROCKER_TLV_CMD_INFO]);
1228 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1229 if (!attr)
1230 return -EIO;
1231
1232 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1233 str = rocker_tlv_data(attr);
1234
1235 /* make sure name only contains alphanumeric characters */
1236 for (i = j = 0; i < len; ++i) {
1237 if (isalnum(str[i])) {
1238 name->buf[j] = str[i];
1239 j++;
1240 }
1241 }
1242
1243 if (j == 0)
1244 return -EIO;
1245
1246 name->buf[j] = '\0';
1247
1248 return 0;
1249 }
1250
1251 static int
1252 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1253 struct rocker_desc_info *desc_info,
1254 void *priv)
1255 {
1256 struct ethtool_link_ksettings *ecmd = priv;
1257 struct rocker_tlv *cmd_info;
1258
1259 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1260 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1261 return -EMSGSIZE;
1262 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1263 if (!cmd_info)
1264 return -EMSGSIZE;
1265 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1266 rocker_port->pport))
1267 return -EMSGSIZE;
1268 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1269 ecmd->base.speed))
1270 return -EMSGSIZE;
1271 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1272 ecmd->base.duplex))
1273 return -EMSGSIZE;
1274 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1275 ecmd->base.autoneg))
1276 return -EMSGSIZE;
1277 rocker_tlv_nest_end(desc_info, cmd_info);
1278 return 0;
1279 }
1280
1281 static int
1282 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1283 struct rocker_desc_info *desc_info,
1284 void *priv)
1285 {
1286 const unsigned char *macaddr = priv;
1287 struct rocker_tlv *cmd_info;
1288
1289 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1290 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1291 return -EMSGSIZE;
1292 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1293 if (!cmd_info)
1294 return -EMSGSIZE;
1295 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1296 rocker_port->pport))
1297 return -EMSGSIZE;
1298 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1299 ETH_ALEN, macaddr))
1300 return -EMSGSIZE;
1301 rocker_tlv_nest_end(desc_info, cmd_info);
1302 return 0;
1303 }
1304
1305 static int
1306 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1307 struct rocker_desc_info *desc_info,
1308 void *priv)
1309 {
1310 int mtu = *(int *)priv;
1311 struct rocker_tlv *cmd_info;
1312
1313 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1314 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1315 return -EMSGSIZE;
1316 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1317 if (!cmd_info)
1318 return -EMSGSIZE;
1319 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1320 rocker_port->pport))
1321 return -EMSGSIZE;
1322 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1323 mtu))
1324 return -EMSGSIZE;
1325 rocker_tlv_nest_end(desc_info, cmd_info);
1326 return 0;
1327 }
1328
1329 static int
1330 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1331 struct rocker_desc_info *desc_info,
1332 void *priv)
1333 {
1334 bool learning = *(bool *)priv;
1335 struct rocker_tlv *cmd_info;
1336
1337 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1338 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1339 return -EMSGSIZE;
1340 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1341 if (!cmd_info)
1342 return -EMSGSIZE;
1343 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1344 rocker_port->pport))
1345 return -EMSGSIZE;
1346 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1347 learning))
1348 return -EMSGSIZE;
1349 rocker_tlv_nest_end(desc_info, cmd_info);
1350 return 0;
1351 }
1352
1353 static int
1354 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1355 struct ethtool_link_ksettings *ecmd)
1356 {
1357 return rocker_cmd_exec(rocker_port, false,
1358 rocker_cmd_get_port_settings_prep, NULL,
1359 rocker_cmd_get_port_settings_ethtool_proc,
1360 ecmd);
1361 }
1362
1363 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1364 unsigned char *macaddr)
1365 {
1366 return rocker_cmd_exec(rocker_port, false,
1367 rocker_cmd_get_port_settings_prep, NULL,
1368 rocker_cmd_get_port_settings_macaddr_proc,
1369 macaddr);
1370 }
1371
1372 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1373 u8 *p_mode)
1374 {
1375 return rocker_cmd_exec(rocker_port, false,
1376 rocker_cmd_get_port_settings_prep, NULL,
1377 rocker_cmd_get_port_settings_mode_proc, p_mode);
1378 }
1379
1380 static int
1381 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1382 const struct ethtool_link_ksettings *ecmd)
1383 {
1384 struct ethtool_link_ksettings copy_ecmd;
1385
1386 memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1387
1388 return rocker_cmd_exec(rocker_port, false,
1389 rocker_cmd_set_port_settings_ethtool_prep,
1390 &copy_ecmd, NULL, NULL);
1391 }
1392
1393 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1394 unsigned char *macaddr)
1395 {
1396 return rocker_cmd_exec(rocker_port, false,
1397 rocker_cmd_set_port_settings_macaddr_prep,
1398 macaddr, NULL, NULL);
1399 }
1400
1401 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1402 int mtu)
1403 {
1404 return rocker_cmd_exec(rocker_port, false,
1405 rocker_cmd_set_port_settings_mtu_prep,
1406 &mtu, NULL, NULL);
1407 }
1408
1409 int rocker_port_set_learning(struct rocker_port *rocker_port,
1410 bool learning)
1411 {
1412 return rocker_cmd_exec(rocker_port, false,
1413 rocker_cmd_set_port_learning_prep,
1414 &learning, NULL, NULL);
1415 }
1416
1417 /**********************
1418 * Worlds manipulation
1419 **********************/
1420
1421 static struct rocker_world_ops *rocker_world_ops[] = {
1422 &rocker_ofdpa_ops,
1423 };
1424
1425 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1426
1427 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1428 {
1429 int i;
1430
1431 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1432 if (rocker_world_ops[i]->mode == mode)
1433 return rocker_world_ops[i];
1434 return NULL;
1435 }
1436
1437 static int rocker_world_init(struct rocker *rocker, u8 mode)
1438 {
1439 struct rocker_world_ops *wops;
1440 int err;
1441
1442 wops = rocker_world_ops_find(mode);
1443 if (!wops) {
1444 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1445 mode);
1446 return -EINVAL;
1447 }
1448 rocker->wops = wops;
1449 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1450 if (!rocker->wpriv)
1451 return -ENOMEM;
1452 if (!wops->init)
1453 return 0;
1454 err = wops->init(rocker);
1455 if (err)
1456 kfree(rocker->wpriv);
1457 return err;
1458 }
1459
1460 static void rocker_world_fini(struct rocker *rocker)
1461 {
1462 struct rocker_world_ops *wops = rocker->wops;
1463
1464 if (!wops || !wops->fini)
1465 return;
1466 wops->fini(rocker);
1467 kfree(rocker->wpriv);
1468 }
1469
1470 static int rocker_world_check_init(struct rocker_port *rocker_port)
1471 {
1472 struct rocker *rocker = rocker_port->rocker;
1473 u8 mode;
1474 int err;
1475
1476 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1477 if (err) {
1478 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1479 return err;
1480 }
1481 if (rocker->wops) {
1482 if (rocker->wops->mode != mode) {
1483 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1484 return -EINVAL;
1485 }
1486 return 0;
1487 }
1488 return rocker_world_init(rocker, mode);
1489 }
1490
1491 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1492 {
1493 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1494 int err;
1495
1496 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1497 if (!rocker_port->wpriv)
1498 return -ENOMEM;
1499 if (!wops->port_pre_init)
1500 return 0;
1501 err = wops->port_pre_init(rocker_port);
1502 if (err)
1503 kfree(rocker_port->wpriv);
1504 return 0;
1505 }
1506
1507 static int rocker_world_port_init(struct rocker_port *rocker_port)
1508 {
1509 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1510
1511 if (!wops->port_init)
1512 return 0;
1513 return wops->port_init(rocker_port);
1514 }
1515
1516 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1517 {
1518 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1519
1520 if (!wops->port_fini)
1521 return;
1522 wops->port_fini(rocker_port);
1523 }
1524
1525 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1526 {
1527 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1528
1529 if (!wops->port_post_fini)
1530 return;
1531 wops->port_post_fini(rocker_port);
1532 kfree(rocker_port->wpriv);
1533 }
1534
1535 static int rocker_world_port_open(struct rocker_port *rocker_port)
1536 {
1537 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1538
1539 if (!wops->port_open)
1540 return 0;
1541 return wops->port_open(rocker_port);
1542 }
1543
1544 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1545 {
1546 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1547
1548 if (!wops->port_stop)
1549 return;
1550 wops->port_stop(rocker_port);
1551 }
1552
1553 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1554 u8 state,
1555 struct switchdev_trans *trans)
1556 {
1557 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1558
1559 if (!wops->port_attr_stp_state_set)
1560 return -EOPNOTSUPP;
1561
1562 if (switchdev_trans_ph_prepare(trans))
1563 return 0;
1564
1565 return wops->port_attr_stp_state_set(rocker_port, state);
1566 }
1567
1568 static int
1569 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1570 unsigned long brport_flags,
1571 struct switchdev_trans *trans)
1572 {
1573 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1574
1575 if (!wops->port_attr_bridge_flags_set)
1576 return -EOPNOTSUPP;
1577
1578 if (switchdev_trans_ph_prepare(trans))
1579 return 0;
1580
1581 return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1582 trans);
1583 }
1584
1585 static int
1586 rocker_world_port_attr_bridge_flags_get(const struct rocker_port *rocker_port,
1587 unsigned long *p_brport_flags)
1588 {
1589 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1590
1591 if (!wops->port_attr_bridge_flags_get)
1592 return -EOPNOTSUPP;
1593 return wops->port_attr_bridge_flags_get(rocker_port, p_brport_flags);
1594 }
1595
1596 static int
1597 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1598 rocker_port,
1599 unsigned long *
1600 p_brport_flags_support)
1601 {
1602 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1603
1604 if (!wops->port_attr_bridge_flags_support_get)
1605 return -EOPNOTSUPP;
1606 return wops->port_attr_bridge_flags_support_get(rocker_port,
1607 p_brport_flags_support);
1608 }
1609
1610 static int
1611 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1612 u32 ageing_time,
1613 struct switchdev_trans *trans)
1614
1615 {
1616 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1617
1618 if (!wops->port_attr_bridge_ageing_time_set)
1619 return -EOPNOTSUPP;
1620
1621 if (switchdev_trans_ph_prepare(trans))
1622 return 0;
1623
1624 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1625 trans);
1626 }
1627
1628 static int
1629 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1630 const struct switchdev_obj_port_vlan *vlan,
1631 struct switchdev_trans *trans)
1632 {
1633 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1634
1635 if (!wops->port_obj_vlan_add)
1636 return -EOPNOTSUPP;
1637
1638 if (switchdev_trans_ph_prepare(trans))
1639 return 0;
1640
1641 return wops->port_obj_vlan_add(rocker_port, vlan);
1642 }
1643
1644 static int
1645 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1646 const struct switchdev_obj_port_vlan *vlan)
1647 {
1648 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1649
1650 if (!wops->port_obj_vlan_del)
1651 return -EOPNOTSUPP;
1652 return wops->port_obj_vlan_del(rocker_port, vlan);
1653 }
1654
1655 static int
1656 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1657 struct switchdev_notifier_fdb_info *info)
1658 {
1659 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1660
1661 if (!wops->port_obj_fdb_add)
1662 return -EOPNOTSUPP;
1663
1664 return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1665 }
1666
1667 static int
1668 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1669 struct switchdev_notifier_fdb_info *info)
1670 {
1671 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1672
1673 if (!wops->port_obj_fdb_del)
1674 return -EOPNOTSUPP;
1675 return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1676 }
1677
1678 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1679 struct net_device *master)
1680 {
1681 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1682
1683 if (!wops->port_master_linked)
1684 return -EOPNOTSUPP;
1685 return wops->port_master_linked(rocker_port, master);
1686 }
1687
1688 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1689 struct net_device *master)
1690 {
1691 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1692
1693 if (!wops->port_master_unlinked)
1694 return -EOPNOTSUPP;
1695 return wops->port_master_unlinked(rocker_port, master);
1696 }
1697
1698 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1699 struct neighbour *n)
1700 {
1701 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1702
1703 if (!wops->port_neigh_update)
1704 return -EOPNOTSUPP;
1705 return wops->port_neigh_update(rocker_port, n);
1706 }
1707
1708 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1709 struct neighbour *n)
1710 {
1711 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1712
1713 if (!wops->port_neigh_destroy)
1714 return -EOPNOTSUPP;
1715 return wops->port_neigh_destroy(rocker_port, n);
1716 }
1717
1718 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1719 const unsigned char *addr,
1720 __be16 vlan_id)
1721 {
1722 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1723
1724 if (!wops->port_ev_mac_vlan_seen)
1725 return -EOPNOTSUPP;
1726 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1727 }
1728
1729 static int rocker_world_fib4_add(struct rocker *rocker,
1730 const struct fib_entry_notifier_info *fen_info)
1731 {
1732 struct rocker_world_ops *wops = rocker->wops;
1733
1734 if (!wops->fib4_add)
1735 return 0;
1736 return wops->fib4_add(rocker, fen_info);
1737 }
1738
1739 static int rocker_world_fib4_del(struct rocker *rocker,
1740 const struct fib_entry_notifier_info *fen_info)
1741 {
1742 struct rocker_world_ops *wops = rocker->wops;
1743
1744 if (!wops->fib4_del)
1745 return 0;
1746 return wops->fib4_del(rocker, fen_info);
1747 }
1748
1749 static void rocker_world_fib4_abort(struct rocker *rocker)
1750 {
1751 struct rocker_world_ops *wops = rocker->wops;
1752
1753 if (wops->fib4_abort)
1754 wops->fib4_abort(rocker);
1755 }
1756
1757 /*****************
1758 * Net device ops
1759 *****************/
1760
1761 static int rocker_port_open(struct net_device *dev)
1762 {
1763 struct rocker_port *rocker_port = netdev_priv(dev);
1764 int err;
1765
1766 err = rocker_port_dma_rings_init(rocker_port);
1767 if (err)
1768 return err;
1769
1770 err = request_irq(rocker_msix_tx_vector(rocker_port),
1771 rocker_tx_irq_handler, 0,
1772 rocker_driver_name, rocker_port);
1773 if (err) {
1774 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1775 goto err_request_tx_irq;
1776 }
1777
1778 err = request_irq(rocker_msix_rx_vector(rocker_port),
1779 rocker_rx_irq_handler, 0,
1780 rocker_driver_name, rocker_port);
1781 if (err) {
1782 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1783 goto err_request_rx_irq;
1784 }
1785
1786 err = rocker_world_port_open(rocker_port);
1787 if (err) {
1788 netdev_err(rocker_port->dev, "cannot open port in world\n");
1789 goto err_world_port_open;
1790 }
1791
1792 napi_enable(&rocker_port->napi_tx);
1793 napi_enable(&rocker_port->napi_rx);
1794 if (!dev->proto_down)
1795 rocker_port_set_enable(rocker_port, true);
1796 netif_start_queue(dev);
1797 return 0;
1798
1799 err_world_port_open:
1800 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1801 err_request_rx_irq:
1802 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1803 err_request_tx_irq:
1804 rocker_port_dma_rings_fini(rocker_port);
1805 return err;
1806 }
1807
1808 static int rocker_port_stop(struct net_device *dev)
1809 {
1810 struct rocker_port *rocker_port = netdev_priv(dev);
1811
1812 netif_stop_queue(dev);
1813 rocker_port_set_enable(rocker_port, false);
1814 napi_disable(&rocker_port->napi_rx);
1815 napi_disable(&rocker_port->napi_tx);
1816 rocker_world_port_stop(rocker_port);
1817 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1818 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1819 rocker_port_dma_rings_fini(rocker_port);
1820
1821 return 0;
1822 }
1823
1824 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1825 const struct rocker_desc_info *desc_info)
1826 {
1827 const struct rocker *rocker = rocker_port->rocker;
1828 struct pci_dev *pdev = rocker->pdev;
1829 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1830 struct rocker_tlv *attr;
1831 int rem;
1832
1833 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1834 if (!attrs[ROCKER_TLV_TX_FRAGS])
1835 return;
1836 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1837 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1838 dma_addr_t dma_handle;
1839 size_t len;
1840
1841 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1842 continue;
1843 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1844 attr);
1845 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1846 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1847 continue;
1848 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1849 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1850 pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
1851 }
1852 }
1853
1854 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1855 struct rocker_desc_info *desc_info,
1856 char *buf, size_t buf_len)
1857 {
1858 const struct rocker *rocker = rocker_port->rocker;
1859 struct pci_dev *pdev = rocker->pdev;
1860 dma_addr_t dma_handle;
1861 struct rocker_tlv *frag;
1862
1863 dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
1864 if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
1865 if (net_ratelimit())
1866 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1867 return -EIO;
1868 }
1869 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1870 if (!frag)
1871 goto unmap_frag;
1872 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1873 dma_handle))
1874 goto nest_cancel;
1875 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1876 buf_len))
1877 goto nest_cancel;
1878 rocker_tlv_nest_end(desc_info, frag);
1879 return 0;
1880
1881 nest_cancel:
1882 rocker_tlv_nest_cancel(desc_info, frag);
1883 unmap_frag:
1884 pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1885 return -EMSGSIZE;
1886 }
1887
1888 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1889 {
1890 struct rocker_port *rocker_port = netdev_priv(dev);
1891 struct rocker *rocker = rocker_port->rocker;
1892 struct rocker_desc_info *desc_info;
1893 struct rocker_tlv *frags;
1894 int i;
1895 int err;
1896
1897 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1898 if (unlikely(!desc_info)) {
1899 if (net_ratelimit())
1900 netdev_err(dev, "tx ring full when queue awake\n");
1901 return NETDEV_TX_BUSY;
1902 }
1903
1904 rocker_desc_cookie_ptr_set(desc_info, skb);
1905
1906 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1907 if (!frags)
1908 goto out;
1909 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1910 skb->data, skb_headlen(skb));
1911 if (err)
1912 goto nest_cancel;
1913 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1914 err = skb_linearize(skb);
1915 if (err)
1916 goto unmap_frags;
1917 }
1918
1919 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1920 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1921
1922 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1923 skb_frag_address(frag),
1924 skb_frag_size(frag));
1925 if (err)
1926 goto unmap_frags;
1927 }
1928 rocker_tlv_nest_end(desc_info, frags);
1929
1930 rocker_desc_gen_clear(desc_info);
1931 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1932
1933 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1934 if (!desc_info)
1935 netif_stop_queue(dev);
1936
1937 return NETDEV_TX_OK;
1938
1939 unmap_frags:
1940 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1941 nest_cancel:
1942 rocker_tlv_nest_cancel(desc_info, frags);
1943 out:
1944 dev_kfree_skb(skb);
1945 dev->stats.tx_dropped++;
1946
1947 return NETDEV_TX_OK;
1948 }
1949
1950 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1951 {
1952 struct sockaddr *addr = p;
1953 struct rocker_port *rocker_port = netdev_priv(dev);
1954 int err;
1955
1956 if (!is_valid_ether_addr(addr->sa_data))
1957 return -EADDRNOTAVAIL;
1958
1959 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1960 if (err)
1961 return err;
1962 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1963 return 0;
1964 }
1965
1966 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1967 {
1968 struct rocker_port *rocker_port = netdev_priv(dev);
1969 int running = netif_running(dev);
1970 int err;
1971
1972 if (running)
1973 rocker_port_stop(dev);
1974
1975 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1976 dev->mtu = new_mtu;
1977
1978 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1979 if (err)
1980 return err;
1981
1982 if (running)
1983 err = rocker_port_open(dev);
1984
1985 return err;
1986 }
1987
1988 static int rocker_port_get_phys_port_name(struct net_device *dev,
1989 char *buf, size_t len)
1990 {
1991 struct rocker_port *rocker_port = netdev_priv(dev);
1992 struct port_name name = { .buf = buf, .len = len };
1993 int err;
1994
1995 err = rocker_cmd_exec(rocker_port, false,
1996 rocker_cmd_get_port_settings_prep, NULL,
1997 rocker_cmd_get_port_settings_phys_name_proc,
1998 &name);
1999
2000 return err ? -EOPNOTSUPP : 0;
2001 }
2002
2003 static int rocker_port_change_proto_down(struct net_device *dev,
2004 bool proto_down)
2005 {
2006 struct rocker_port *rocker_port = netdev_priv(dev);
2007
2008 if (rocker_port->dev->flags & IFF_UP)
2009 rocker_port_set_enable(rocker_port, !proto_down);
2010 rocker_port->dev->proto_down = proto_down;
2011 return 0;
2012 }
2013
2014 static void rocker_port_neigh_destroy(struct net_device *dev,
2015 struct neighbour *n)
2016 {
2017 struct rocker_port *rocker_port = netdev_priv(n->dev);
2018 int err;
2019
2020 err = rocker_world_port_neigh_destroy(rocker_port, n);
2021 if (err)
2022 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2023 err);
2024 }
2025
2026 static const struct net_device_ops rocker_port_netdev_ops = {
2027 .ndo_open = rocker_port_open,
2028 .ndo_stop = rocker_port_stop,
2029 .ndo_start_xmit = rocker_port_xmit,
2030 .ndo_set_mac_address = rocker_port_set_mac_address,
2031 .ndo_change_mtu = rocker_port_change_mtu,
2032 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2033 .ndo_change_proto_down = rocker_port_change_proto_down,
2034 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2035 };
2036
2037 /********************
2038 * swdev interface
2039 ********************/
2040
2041 static int rocker_port_attr_get(struct net_device *dev,
2042 struct switchdev_attr *attr)
2043 {
2044 const struct rocker_port *rocker_port = netdev_priv(dev);
2045 const struct rocker *rocker = rocker_port->rocker;
2046 int err = 0;
2047
2048 switch (attr->id) {
2049 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
2050 attr->u.ppid.id_len = sizeof(rocker->hw.id);
2051 memcpy(&attr->u.ppid.id, &rocker->hw.id, attr->u.ppid.id_len);
2052 break;
2053 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2054 err = rocker_world_port_attr_bridge_flags_get(rocker_port,
2055 &attr->u.brport_flags);
2056 break;
2057 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
2058 err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
2059 &attr->u.brport_flags_support);
2060 break;
2061 default:
2062 return -EOPNOTSUPP;
2063 }
2064
2065 return err;
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_BRIDGE_FLAGS:
2082 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2083 attr->u.brport_flags,
2084 trans);
2085 break;
2086 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2087 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2088 attr->u.ageing_time,
2089 trans);
2090 break;
2091 default:
2092 err = -EOPNOTSUPP;
2093 break;
2094 }
2095
2096 return err;
2097 }
2098
2099 static int rocker_port_obj_add(struct net_device *dev,
2100 const struct switchdev_obj *obj,
2101 struct switchdev_trans *trans)
2102 {
2103 struct rocker_port *rocker_port = netdev_priv(dev);
2104 int err = 0;
2105
2106 switch (obj->id) {
2107 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2108 err = rocker_world_port_obj_vlan_add(rocker_port,
2109 SWITCHDEV_OBJ_PORT_VLAN(obj),
2110 trans);
2111 break;
2112 default:
2113 err = -EOPNOTSUPP;
2114 break;
2115 }
2116
2117 return err;
2118 }
2119
2120 static int rocker_port_obj_del(struct net_device *dev,
2121 const struct switchdev_obj *obj)
2122 {
2123 struct rocker_port *rocker_port = netdev_priv(dev);
2124 int err = 0;
2125
2126 switch (obj->id) {
2127 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2128 err = rocker_world_port_obj_vlan_del(rocker_port,
2129 SWITCHDEV_OBJ_PORT_VLAN(obj));
2130 break;
2131 default:
2132 err = -EOPNOTSUPP;
2133 break;
2134 }
2135
2136 return err;
2137 }
2138
2139 static const struct switchdev_ops rocker_port_switchdev_ops = {
2140 .switchdev_port_attr_get = rocker_port_attr_get,
2141 .switchdev_port_attr_set = rocker_port_attr_set,
2142 .switchdev_port_obj_add = rocker_port_obj_add,
2143 .switchdev_port_obj_del = rocker_port_obj_del,
2144 };
2145
2146 struct rocker_fib_event_work {
2147 struct work_struct work;
2148 union {
2149 struct fib_entry_notifier_info fen_info;
2150 struct fib_rule_notifier_info fr_info;
2151 };
2152 struct rocker *rocker;
2153 unsigned long event;
2154 };
2155
2156 static void rocker_router_fib_event_work(struct work_struct *work)
2157 {
2158 struct rocker_fib_event_work *fib_work =
2159 container_of(work, struct rocker_fib_event_work, work);
2160 struct rocker *rocker = fib_work->rocker;
2161 struct fib_rule *rule;
2162 int err;
2163
2164 /* Protect internal structures from changes */
2165 rtnl_lock();
2166 switch (fib_work->event) {
2167 case FIB_EVENT_ENTRY_ADD:
2168 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2169 if (err)
2170 rocker_world_fib4_abort(rocker);
2171 fib_info_put(fib_work->fen_info.fi);
2172 break;
2173 case FIB_EVENT_ENTRY_DEL:
2174 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2175 fib_info_put(fib_work->fen_info.fi);
2176 break;
2177 case FIB_EVENT_RULE_ADD: /* fall through */
2178 case FIB_EVENT_RULE_DEL:
2179 rule = fib_work->fr_info.rule;
2180 if (!fib4_rule_default(rule))
2181 rocker_world_fib4_abort(rocker);
2182 fib_rule_put(rule);
2183 break;
2184 }
2185 rtnl_unlock();
2186 kfree(fib_work);
2187 }
2188
2189 /* Called with rcu_read_lock() */
2190 static int rocker_router_fib_event(struct notifier_block *nb,
2191 unsigned long event, void *ptr)
2192 {
2193 struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2194 struct rocker_fib_event_work *fib_work;
2195 struct fib_notifier_info *info = ptr;
2196
2197 if (info->family != AF_INET)
2198 return NOTIFY_DONE;
2199
2200 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2201 if (WARN_ON(!fib_work))
2202 return NOTIFY_BAD;
2203
2204 INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2205 fib_work->rocker = rocker;
2206 fib_work->event = event;
2207
2208 switch (event) {
2209 case FIB_EVENT_ENTRY_ADD: /* fall through */
2210 case FIB_EVENT_ENTRY_DEL:
2211 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2212 /* Take referece on fib_info to prevent it from being
2213 * freed while work is queued. Release it afterwards.
2214 */
2215 fib_info_hold(fib_work->fen_info.fi);
2216 break;
2217 case FIB_EVENT_RULE_ADD: /* fall through */
2218 case FIB_EVENT_RULE_DEL:
2219 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2220 fib_rule_get(fib_work->fr_info.rule);
2221 break;
2222 }
2223
2224 queue_work(rocker->rocker_owq, &fib_work->work);
2225
2226 return NOTIFY_DONE;
2227 }
2228
2229 /********************
2230 * ethtool interface
2231 ********************/
2232
2233 static int
2234 rocker_port_get_link_ksettings(struct net_device *dev,
2235 struct ethtool_link_ksettings *ecmd)
2236 {
2237 struct rocker_port *rocker_port = netdev_priv(dev);
2238
2239 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2240 }
2241
2242 static int
2243 rocker_port_set_link_ksettings(struct net_device *dev,
2244 const struct ethtool_link_ksettings *ecmd)
2245 {
2246 struct rocker_port *rocker_port = netdev_priv(dev);
2247
2248 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2249 }
2250
2251 static void rocker_port_get_drvinfo(struct net_device *dev,
2252 struct ethtool_drvinfo *drvinfo)
2253 {
2254 strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2255 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2256 }
2257
2258 static struct rocker_port_stats {
2259 char str[ETH_GSTRING_LEN];
2260 int type;
2261 } rocker_port_stats[] = {
2262 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2263 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2264 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2265 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2266
2267 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2268 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2269 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2270 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2271 };
2272
2273 #define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2274
2275 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2276 u8 *data)
2277 {
2278 u8 *p = data;
2279 int i;
2280
2281 switch (stringset) {
2282 case ETH_SS_STATS:
2283 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2284 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2285 p += ETH_GSTRING_LEN;
2286 }
2287 break;
2288 }
2289 }
2290
2291 static int
2292 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2293 struct rocker_desc_info *desc_info,
2294 void *priv)
2295 {
2296 struct rocker_tlv *cmd_stats;
2297
2298 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2299 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2300 return -EMSGSIZE;
2301
2302 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2303 if (!cmd_stats)
2304 return -EMSGSIZE;
2305
2306 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2307 rocker_port->pport))
2308 return -EMSGSIZE;
2309
2310 rocker_tlv_nest_end(desc_info, cmd_stats);
2311
2312 return 0;
2313 }
2314
2315 static int
2316 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2317 const struct rocker_desc_info *desc_info,
2318 void *priv)
2319 {
2320 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2321 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2322 const struct rocker_tlv *pattr;
2323 u32 pport;
2324 u64 *data = priv;
2325 int i;
2326
2327 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2328
2329 if (!attrs[ROCKER_TLV_CMD_INFO])
2330 return -EIO;
2331
2332 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2333 attrs[ROCKER_TLV_CMD_INFO]);
2334
2335 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2336 return -EIO;
2337
2338 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2339 if (pport != rocker_port->pport)
2340 return -EIO;
2341
2342 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2343 pattr = stats_attrs[rocker_port_stats[i].type];
2344 if (!pattr)
2345 continue;
2346
2347 data[i] = rocker_tlv_get_u64(pattr);
2348 }
2349
2350 return 0;
2351 }
2352
2353 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2354 void *priv)
2355 {
2356 return rocker_cmd_exec(rocker_port, false,
2357 rocker_cmd_get_port_stats_prep, NULL,
2358 rocker_cmd_get_port_stats_ethtool_proc,
2359 priv);
2360 }
2361
2362 static void rocker_port_get_stats(struct net_device *dev,
2363 struct ethtool_stats *stats, u64 *data)
2364 {
2365 struct rocker_port *rocker_port = netdev_priv(dev);
2366
2367 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2368 int i;
2369
2370 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2371 data[i] = 0;
2372 }
2373 }
2374
2375 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2376 {
2377 switch (sset) {
2378 case ETH_SS_STATS:
2379 return ROCKER_PORT_STATS_LEN;
2380 default:
2381 return -EOPNOTSUPP;
2382 }
2383 }
2384
2385 static const struct ethtool_ops rocker_port_ethtool_ops = {
2386 .get_drvinfo = rocker_port_get_drvinfo,
2387 .get_link = ethtool_op_get_link,
2388 .get_strings = rocker_port_get_strings,
2389 .get_ethtool_stats = rocker_port_get_stats,
2390 .get_sset_count = rocker_port_get_sset_count,
2391 .get_link_ksettings = rocker_port_get_link_ksettings,
2392 .set_link_ksettings = rocker_port_set_link_ksettings,
2393 };
2394
2395 /*****************
2396 * NAPI interface
2397 *****************/
2398
2399 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2400 {
2401 return container_of(napi, struct rocker_port, napi_tx);
2402 }
2403
2404 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2405 {
2406 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2407 const struct rocker *rocker = rocker_port->rocker;
2408 const struct rocker_desc_info *desc_info;
2409 u32 credits = 0;
2410 int err;
2411
2412 /* Cleanup tx descriptors */
2413 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2414 struct sk_buff *skb;
2415
2416 err = rocker_desc_err(desc_info);
2417 if (err && net_ratelimit())
2418 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2419 err);
2420 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2421
2422 skb = rocker_desc_cookie_ptr_get(desc_info);
2423 if (err == 0) {
2424 rocker_port->dev->stats.tx_packets++;
2425 rocker_port->dev->stats.tx_bytes += skb->len;
2426 } else {
2427 rocker_port->dev->stats.tx_errors++;
2428 }
2429
2430 dev_kfree_skb_any(skb);
2431 credits++;
2432 }
2433
2434 if (credits && netif_queue_stopped(rocker_port->dev))
2435 netif_wake_queue(rocker_port->dev);
2436
2437 napi_complete(napi);
2438 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2439
2440 return 0;
2441 }
2442
2443 static int rocker_port_rx_proc(const struct rocker *rocker,
2444 const struct rocker_port *rocker_port,
2445 struct rocker_desc_info *desc_info)
2446 {
2447 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2448 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2449 size_t rx_len;
2450 u16 rx_flags = 0;
2451
2452 if (!skb)
2453 return -ENOENT;
2454
2455 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2456 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2457 return -EINVAL;
2458 if (attrs[ROCKER_TLV_RX_FLAGS])
2459 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2460
2461 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2462
2463 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2464 skb_put(skb, rx_len);
2465 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2466
2467 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2468 skb->offload_fwd_mark = 1;
2469
2470 rocker_port->dev->stats.rx_packets++;
2471 rocker_port->dev->stats.rx_bytes += skb->len;
2472
2473 netif_receive_skb(skb);
2474
2475 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2476 }
2477
2478 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2479 {
2480 return container_of(napi, struct rocker_port, napi_rx);
2481 }
2482
2483 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2484 {
2485 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2486 const struct rocker *rocker = rocker_port->rocker;
2487 struct rocker_desc_info *desc_info;
2488 u32 credits = 0;
2489 int err;
2490
2491 /* Process rx descriptors */
2492 while (credits < budget &&
2493 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2494 err = rocker_desc_err(desc_info);
2495 if (err) {
2496 if (net_ratelimit())
2497 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2498 err);
2499 } else {
2500 err = rocker_port_rx_proc(rocker, rocker_port,
2501 desc_info);
2502 if (err && net_ratelimit())
2503 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2504 err);
2505 }
2506 if (err)
2507 rocker_port->dev->stats.rx_errors++;
2508
2509 rocker_desc_gen_clear(desc_info);
2510 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2511 credits++;
2512 }
2513
2514 if (credits < budget)
2515 napi_complete_done(napi, credits);
2516
2517 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2518
2519 return credits;
2520 }
2521
2522 /*****************
2523 * PCI driver ops
2524 *****************/
2525
2526 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2527 {
2528 const struct rocker *rocker = rocker_port->rocker;
2529 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2530 bool link_up;
2531
2532 link_up = link_status & (1 << rocker_port->pport);
2533 if (link_up)
2534 netif_carrier_on(rocker_port->dev);
2535 else
2536 netif_carrier_off(rocker_port->dev);
2537 }
2538
2539 static void rocker_remove_ports(struct rocker *rocker)
2540 {
2541 struct rocker_port *rocker_port;
2542 int i;
2543
2544 for (i = 0; i < rocker->port_count; i++) {
2545 rocker_port = rocker->ports[i];
2546 if (!rocker_port)
2547 continue;
2548 rocker_world_port_fini(rocker_port);
2549 unregister_netdev(rocker_port->dev);
2550 rocker_world_port_post_fini(rocker_port);
2551 free_netdev(rocker_port->dev);
2552 }
2553 rocker_world_fini(rocker);
2554 kfree(rocker->ports);
2555 }
2556
2557 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2558 {
2559 const struct rocker *rocker = rocker_port->rocker;
2560 const struct pci_dev *pdev = rocker->pdev;
2561 int err;
2562
2563 err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2564 rocker_port->dev->dev_addr);
2565 if (err) {
2566 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2567 eth_hw_addr_random(rocker_port->dev);
2568 }
2569 }
2570
2571 #define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2572 #define ROCKER_PORT_MAX_MTU 9000
2573 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2574 {
2575 struct pci_dev *pdev = rocker->pdev;
2576 struct rocker_port *rocker_port;
2577 struct net_device *dev;
2578 int err;
2579
2580 dev = alloc_etherdev(sizeof(struct rocker_port));
2581 if (!dev)
2582 return -ENOMEM;
2583 SET_NETDEV_DEV(dev, &pdev->dev);
2584 rocker_port = netdev_priv(dev);
2585 rocker_port->dev = dev;
2586 rocker_port->rocker = rocker;
2587 rocker_port->port_number = port_number;
2588 rocker_port->pport = port_number + 1;
2589
2590 err = rocker_world_check_init(rocker_port);
2591 if (err) {
2592 dev_err(&pdev->dev, "world init failed\n");
2593 goto err_world_check_init;
2594 }
2595
2596 rocker_port_dev_addr_init(rocker_port);
2597 dev->netdev_ops = &rocker_port_netdev_ops;
2598 dev->ethtool_ops = &rocker_port_ethtool_ops;
2599 dev->switchdev_ops = &rocker_port_switchdev_ops;
2600 netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2601 NAPI_POLL_WEIGHT);
2602 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2603 NAPI_POLL_WEIGHT);
2604 rocker_carrier_init(rocker_port);
2605
2606 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2607
2608 /* MTU range: 68 - 9000 */
2609 dev->min_mtu = ROCKER_PORT_MIN_MTU;
2610 dev->max_mtu = ROCKER_PORT_MAX_MTU;
2611
2612 err = rocker_world_port_pre_init(rocker_port);
2613 if (err) {
2614 dev_err(&pdev->dev, "port world pre-init failed\n");
2615 goto err_world_port_pre_init;
2616 }
2617 err = register_netdev(dev);
2618 if (err) {
2619 dev_err(&pdev->dev, "register_netdev failed\n");
2620 goto err_register_netdev;
2621 }
2622 rocker->ports[port_number] = rocker_port;
2623
2624 err = rocker_world_port_init(rocker_port);
2625 if (err) {
2626 dev_err(&pdev->dev, "port world init failed\n");
2627 goto err_world_port_init;
2628 }
2629
2630 return 0;
2631
2632 err_world_port_init:
2633 rocker->ports[port_number] = NULL;
2634 unregister_netdev(dev);
2635 err_register_netdev:
2636 rocker_world_port_post_fini(rocker_port);
2637 err_world_port_pre_init:
2638 err_world_check_init:
2639 free_netdev(dev);
2640 return err;
2641 }
2642
2643 static int rocker_probe_ports(struct rocker *rocker)
2644 {
2645 int i;
2646 size_t alloc_size;
2647 int err;
2648
2649 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2650 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2651 if (!rocker->ports)
2652 return -ENOMEM;
2653 for (i = 0; i < rocker->port_count; i++) {
2654 err = rocker_probe_port(rocker, i);
2655 if (err)
2656 goto remove_ports;
2657 }
2658 return 0;
2659
2660 remove_ports:
2661 rocker_remove_ports(rocker);
2662 return err;
2663 }
2664
2665 static int rocker_msix_init(struct rocker *rocker)
2666 {
2667 struct pci_dev *pdev = rocker->pdev;
2668 int msix_entries;
2669 int i;
2670 int err;
2671
2672 msix_entries = pci_msix_vec_count(pdev);
2673 if (msix_entries < 0)
2674 return msix_entries;
2675
2676 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2677 return -EINVAL;
2678
2679 rocker->msix_entries = kmalloc_array(msix_entries,
2680 sizeof(struct msix_entry),
2681 GFP_KERNEL);
2682 if (!rocker->msix_entries)
2683 return -ENOMEM;
2684
2685 for (i = 0; i < msix_entries; i++)
2686 rocker->msix_entries[i].entry = i;
2687
2688 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2689 if (err < 0)
2690 goto err_enable_msix;
2691
2692 return 0;
2693
2694 err_enable_msix:
2695 kfree(rocker->msix_entries);
2696 return err;
2697 }
2698
2699 static void rocker_msix_fini(const struct rocker *rocker)
2700 {
2701 pci_disable_msix(rocker->pdev);
2702 kfree(rocker->msix_entries);
2703 }
2704
2705 static bool rocker_port_dev_check(const struct net_device *dev)
2706 {
2707 return dev->netdev_ops == &rocker_port_netdev_ops;
2708 }
2709
2710 struct rocker_switchdev_event_work {
2711 struct work_struct work;
2712 struct switchdev_notifier_fdb_info fdb_info;
2713 struct rocker_port *rocker_port;
2714 unsigned long event;
2715 };
2716
2717 static void
2718 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2719 struct switchdev_notifier_fdb_info *recv_info)
2720 {
2721 struct switchdev_notifier_fdb_info info;
2722
2723 info.addr = recv_info->addr;
2724 info.vid = recv_info->vid;
2725 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2726 rocker_port->dev, &info.info);
2727 }
2728
2729 static void rocker_switchdev_event_work(struct work_struct *work)
2730 {
2731 struct rocker_switchdev_event_work *switchdev_work =
2732 container_of(work, struct rocker_switchdev_event_work, work);
2733 struct rocker_port *rocker_port = switchdev_work->rocker_port;
2734 struct switchdev_notifier_fdb_info *fdb_info;
2735 int err;
2736
2737 rtnl_lock();
2738 switch (switchdev_work->event) {
2739 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2740 fdb_info = &switchdev_work->fdb_info;
2741 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2742 if (err) {
2743 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744 break;
2745 }
2746 rocker_fdb_offload_notify(rocker_port, fdb_info);
2747 break;
2748 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2749 fdb_info = &switchdev_work->fdb_info;
2750 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2751 if (err)
2752 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2753 break;
2754 }
2755 rtnl_unlock();
2756
2757 kfree(switchdev_work->fdb_info.addr);
2758 kfree(switchdev_work);
2759 dev_put(rocker_port->dev);
2760 }
2761
2762 /* called under rcu_read_lock() */
2763 static int rocker_switchdev_event(struct notifier_block *unused,
2764 unsigned long event, void *ptr)
2765 {
2766 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2767 struct rocker_switchdev_event_work *switchdev_work;
2768 struct switchdev_notifier_fdb_info *fdb_info = ptr;
2769 struct rocker_port *rocker_port;
2770
2771 if (!rocker_port_dev_check(dev))
2772 return NOTIFY_DONE;
2773
2774 rocker_port = netdev_priv(dev);
2775 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2776 if (WARN_ON(!switchdev_work))
2777 return NOTIFY_BAD;
2778
2779 INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2780 switchdev_work->rocker_port = rocker_port;
2781 switchdev_work->event = event;
2782
2783 switch (event) {
2784 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
2785 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2786 memcpy(&switchdev_work->fdb_info, ptr,
2787 sizeof(switchdev_work->fdb_info));
2788 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2789 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2790 fdb_info->addr);
2791 /* Take a reference on the rocker device */
2792 dev_hold(dev);
2793 break;
2794 default:
2795 kfree(switchdev_work);
2796 return NOTIFY_DONE;
2797 }
2798
2799 queue_work(rocker_port->rocker->rocker_owq,
2800 &switchdev_work->work);
2801 return NOTIFY_DONE;
2802 }
2803
2804 static struct notifier_block rocker_switchdev_notifier = {
2805 .notifier_call = rocker_switchdev_event,
2806 };
2807
2808 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2809 {
2810 struct rocker *rocker;
2811 int err;
2812
2813 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2814 if (!rocker)
2815 return -ENOMEM;
2816
2817 err = pci_enable_device(pdev);
2818 if (err) {
2819 dev_err(&pdev->dev, "pci_enable_device failed\n");
2820 goto err_pci_enable_device;
2821 }
2822
2823 err = pci_request_regions(pdev, rocker_driver_name);
2824 if (err) {
2825 dev_err(&pdev->dev, "pci_request_regions failed\n");
2826 goto err_pci_request_regions;
2827 }
2828
2829 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2830 if (!err) {
2831 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2832 if (err) {
2833 dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2834 goto err_pci_set_dma_mask;
2835 }
2836 } else {
2837 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2838 if (err) {
2839 dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2840 goto err_pci_set_dma_mask;
2841 }
2842 }
2843
2844 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2845 dev_err(&pdev->dev, "invalid PCI region size\n");
2846 err = -EINVAL;
2847 goto err_pci_resource_len_check;
2848 }
2849
2850 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2851 pci_resource_len(pdev, 0));
2852 if (!rocker->hw_addr) {
2853 dev_err(&pdev->dev, "ioremap failed\n");
2854 err = -EIO;
2855 goto err_ioremap;
2856 }
2857 pci_set_master(pdev);
2858
2859 rocker->pdev = pdev;
2860 pci_set_drvdata(pdev, rocker);
2861
2862 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2863
2864 err = rocker_msix_init(rocker);
2865 if (err) {
2866 dev_err(&pdev->dev, "MSI-X init failed\n");
2867 goto err_msix_init;
2868 }
2869
2870 err = rocker_basic_hw_test(rocker);
2871 if (err) {
2872 dev_err(&pdev->dev, "basic hw test failed\n");
2873 goto err_basic_hw_test;
2874 }
2875
2876 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2877
2878 err = rocker_dma_rings_init(rocker);
2879 if (err)
2880 goto err_dma_rings_init;
2881
2882 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2883 rocker_cmd_irq_handler, 0,
2884 rocker_driver_name, rocker);
2885 if (err) {
2886 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2887 goto err_request_cmd_irq;
2888 }
2889
2890 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2891 rocker_event_irq_handler, 0,
2892 rocker_driver_name, rocker);
2893 if (err) {
2894 dev_err(&pdev->dev, "cannot assign event irq\n");
2895 goto err_request_event_irq;
2896 }
2897
2898 rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2899 WQ_MEM_RECLAIM);
2900 if (!rocker->rocker_owq) {
2901 err = -ENOMEM;
2902 goto err_alloc_ordered_workqueue;
2903 }
2904
2905 err = rocker_probe_ports(rocker);
2906 if (err) {
2907 dev_err(&pdev->dev, "failed to probe ports\n");
2908 goto err_probe_ports;
2909 }
2910
2911 /* Only FIBs pointing to our own netdevs are programmed into
2912 * the device, so no need to pass a callback.
2913 */
2914 rocker->fib_nb.notifier_call = rocker_router_fib_event;
2915 err = register_fib_notifier(&rocker->fib_nb, NULL);
2916 if (err)
2917 goto err_register_fib_notifier;
2918
2919 err = register_switchdev_notifier(&rocker_switchdev_notifier);
2920 if (err) {
2921 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2922 goto err_register_switchdev_notifier;
2923 }
2924
2925 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2926
2927 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2928 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2929
2930 return 0;
2931
2932 err_register_switchdev_notifier:
2933 unregister_fib_notifier(&rocker->fib_nb);
2934 err_register_fib_notifier:
2935 rocker_remove_ports(rocker);
2936 err_probe_ports:
2937 destroy_workqueue(rocker->rocker_owq);
2938 err_alloc_ordered_workqueue:
2939 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2940 err_request_event_irq:
2941 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2942 err_request_cmd_irq:
2943 rocker_dma_rings_fini(rocker);
2944 err_dma_rings_init:
2945 err_basic_hw_test:
2946 rocker_msix_fini(rocker);
2947 err_msix_init:
2948 iounmap(rocker->hw_addr);
2949 err_ioremap:
2950 err_pci_resource_len_check:
2951 err_pci_set_dma_mask:
2952 pci_release_regions(pdev);
2953 err_pci_request_regions:
2954 pci_disable_device(pdev);
2955 err_pci_enable_device:
2956 kfree(rocker);
2957 return err;
2958 }
2959
2960 static void rocker_remove(struct pci_dev *pdev)
2961 {
2962 struct rocker *rocker = pci_get_drvdata(pdev);
2963
2964 unregister_switchdev_notifier(&rocker_switchdev_notifier);
2965 unregister_fib_notifier(&rocker->fib_nb);
2966 rocker_remove_ports(rocker);
2967 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2968 destroy_workqueue(rocker->rocker_owq);
2969 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2970 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2971 rocker_dma_rings_fini(rocker);
2972 rocker_msix_fini(rocker);
2973 iounmap(rocker->hw_addr);
2974 pci_release_regions(rocker->pdev);
2975 pci_disable_device(rocker->pdev);
2976 kfree(rocker);
2977 }
2978
2979 static struct pci_driver rocker_pci_driver = {
2980 .name = rocker_driver_name,
2981 .id_table = rocker_pci_id_table,
2982 .probe = rocker_probe,
2983 .remove = rocker_remove,
2984 };
2985
2986 /************************************
2987 * Net device notifier event handler
2988 ************************************/
2989
2990 static bool rocker_port_dev_check_under(const struct net_device *dev,
2991 struct rocker *rocker)
2992 {
2993 struct rocker_port *rocker_port;
2994
2995 if (!rocker_port_dev_check(dev))
2996 return false;
2997
2998 rocker_port = netdev_priv(dev);
2999 if (rocker_port->rocker != rocker)
3000 return false;
3001
3002 return true;
3003 }
3004
3005 struct rocker_walk_data {
3006 struct rocker *rocker;
3007 struct rocker_port *port;
3008 };
3009
3010 static int rocker_lower_dev_walk(struct net_device *lower_dev, void *_data)
3011 {
3012 struct rocker_walk_data *data = _data;
3013 int ret = 0;
3014
3015 if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3016 data->port = netdev_priv(lower_dev);
3017 ret = 1;
3018 }
3019
3020 return ret;
3021 }
3022
3023 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3024 struct rocker *rocker)
3025 {
3026 struct rocker_walk_data data;
3027
3028 if (rocker_port_dev_check_under(dev, rocker))
3029 return netdev_priv(dev);
3030
3031 data.rocker = rocker;
3032 data.port = NULL;
3033 netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &data);
3034
3035 return data.port;
3036 }
3037
3038 static int rocker_netdevice_event(struct notifier_block *unused,
3039 unsigned long event, void *ptr)
3040 {
3041 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3042 struct netdev_notifier_changeupper_info *info;
3043 struct rocker_port *rocker_port;
3044 int err;
3045
3046 if (!rocker_port_dev_check(dev))
3047 return NOTIFY_DONE;
3048
3049 switch (event) {
3050 case NETDEV_CHANGEUPPER:
3051 info = ptr;
3052 if (!info->master)
3053 goto out;
3054 rocker_port = netdev_priv(dev);
3055 if (info->linking) {
3056 err = rocker_world_port_master_linked(rocker_port,
3057 info->upper_dev);
3058 if (err)
3059 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3060 err);
3061 } else {
3062 err = rocker_world_port_master_unlinked(rocker_port,
3063 info->upper_dev);
3064 if (err)
3065 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3066 err);
3067 }
3068 }
3069 out:
3070 return NOTIFY_DONE;
3071 }
3072
3073 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3074 .notifier_call = rocker_netdevice_event,
3075 };
3076
3077 /************************************
3078 * Net event notifier event handler
3079 ************************************/
3080
3081 static int rocker_netevent_event(struct notifier_block *unused,
3082 unsigned long event, void *ptr)
3083 {
3084 struct rocker_port *rocker_port;
3085 struct net_device *dev;
3086 struct neighbour *n = ptr;
3087 int err;
3088
3089 switch (event) {
3090 case NETEVENT_NEIGH_UPDATE:
3091 if (n->tbl != &arp_tbl)
3092 return NOTIFY_DONE;
3093 dev = n->dev;
3094 if (!rocker_port_dev_check(dev))
3095 return NOTIFY_DONE;
3096 rocker_port = netdev_priv(dev);
3097 err = rocker_world_port_neigh_update(rocker_port, n);
3098 if (err)
3099 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3100 err);
3101 break;
3102 }
3103
3104 return NOTIFY_DONE;
3105 }
3106
3107 static struct notifier_block rocker_netevent_nb __read_mostly = {
3108 .notifier_call = rocker_netevent_event,
3109 };
3110
3111 /***********************
3112 * Module init and exit
3113 ***********************/
3114
3115 static int __init rocker_module_init(void)
3116 {
3117 int err;
3118
3119 register_netdevice_notifier(&rocker_netdevice_nb);
3120 register_netevent_notifier(&rocker_netevent_nb);
3121 err = pci_register_driver(&rocker_pci_driver);
3122 if (err)
3123 goto err_pci_register_driver;
3124 return 0;
3125
3126 err_pci_register_driver:
3127 unregister_netevent_notifier(&rocker_netevent_nb);
3128 unregister_netdevice_notifier(&rocker_netdevice_nb);
3129 return err;
3130 }
3131
3132 static void __exit rocker_module_exit(void)
3133 {
3134 unregister_netevent_notifier(&rocker_netevent_nb);
3135 unregister_netdevice_notifier(&rocker_netdevice_nb);
3136 pci_unregister_driver(&rocker_pci_driver);
3137 }
3138
3139 module_init(rocker_module_init);
3140 module_exit(rocker_module_exit);
3141
3142 MODULE_LICENSE("GPL v2");
3143 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3144 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3145 MODULE_DESCRIPTION("Rocker switch device driver");
3146 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
CRIS linux kernel tree