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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
45static const char rocker_driver_name[] = "rocker";
46
47static const struct pci_device_id rocker_pci_id_table[] = {
48 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
49 {0, }
50};
51
52struct rocker_wait {
53 wait_queue_head_t wait;
54 bool done;
55 bool nowait;
56};
57
58static void rocker_wait_reset(struct rocker_wait *wait)
59{
60 wait->done = false;
61 wait->nowait = false;
62}
63
64static void rocker_wait_init(struct rocker_wait *wait)
65{
66 init_waitqueue_head(&wait->wait);
67 rocker_wait_reset(wait);
68}
69
70static 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
80static void rocker_wait_destroy(struct rocker_wait *wait)
81{
82 kfree(wait);
83}
84
85static 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
94static void rocker_wait_wake_up(struct rocker_wait *wait)
95{
96 wait->done = true;
97 wake_up(&wait->wait);
98}
99
100static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
101{
102 return rocker->msix_entries[vector].vector;
103}
104
105static 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
111static 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
130static 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
160static 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
189static 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
240unmap:
241 pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
242 PCI_DMA_BIDIRECTIONAL);
243free_alloc:
244 kfree(alloc);
245
246 return err;
247}
248
249static 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
263static 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
272static 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
305free_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
314static u32 __pos_inc(u32 pos, size_t limit)
315{
316 return ++pos == limit ? 0 : pos;
317}
318
319static 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
347static 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
352static 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
359static void *
360rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
361{
362 return (void *)(uintptr_t)desc_info->desc->cookie;
363}
364
365static 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
371static struct rocker_desc_info *
372rocker_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
384static 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
390static 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
402static struct rocker_desc_info *
403rocker_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
417static 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
425static 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
431static 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
467static 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
478static 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
493static 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
529rollback:
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
540static 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
559static 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
570static void
571rocker_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
578static 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
591rollback:
592 for (i--; i >= 0; i--)
593 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
594 return err;
595}
596
597static 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
606static 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
651err_dma_event_ring_bufs_alloc:
652 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
653err_dma_event_ring_create:
654 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
655 PCI_DMA_BIDIRECTIONAL);
656err_dma_cmd_ring_waits_alloc:
657 rocker_dma_cmd_ring_waits_free(rocker);
658err_dma_cmd_ring_bufs_alloc:
659 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
660 return err;
661}
662
663static 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
674static 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
692tlv_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
698static 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
703static 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
729static 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
744static 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
757static 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
772rollback:
773 for (i--; i >= 0; i--)
774 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
775 return err;
776}
777
778static 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
788static 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
836err_dma_rx_ring_skbs_alloc:
837 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
838 PCI_DMA_BIDIRECTIONAL);
839err_dma_rx_ring_bufs_alloc:
840 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
841err_dma_rx_ring_create:
842 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
843 PCI_DMA_TODEVICE);
844err_dma_tx_ring_bufs_alloc:
845 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
846 return err;
847}
848
849static 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
862static 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
878static 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
901static 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
907static 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
913static 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
943static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
944 const unsigned char *addr,
945 __be16 vlan_id);
946
947static 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
973static 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
998static 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
1026static 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
1034static 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
1046int 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
1095static int
1096rocker_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
1115static int
1116rocker_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
1154static int
1155rocker_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
1181static int
1182rocker_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
1205struct port_name {
1206 char *buf;
1207 size_t len;
1208};
1209
1210static int
1211rocker_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
1251static int
1252rocker_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
1281static int
1282rocker_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
1305static int
1306rocker_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
1329static int
1330rocker_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
1353static int
1354rocker_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
1363static 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
1372static 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
1380static int
1381rocker_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(©_ecmd, ecmd, sizeof(copy_ecmd));
1387
1388 return rocker_cmd_exec(rocker_port, false,
1389 rocker_cmd_set_port_settings_ethtool_prep,
1390 ©_ecmd, NULL, NULL);
1391}
1392
1393static 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
1401static 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
1409int 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
1421static 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
1427static 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
1437static 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
1460static 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
1470static 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
1491static 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
1507static 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
1516static 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
1525static 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
1535static 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
1544static 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
1553static 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
1568static int
1569rocker_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
1585static int
1586rocker_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
1596static int
1597rocker_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
1610static int
1611rocker_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
1628static int
1629rocker_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
1644static int
1645rocker_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
1655static int
1656rocker_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
1667static int
1668rocker_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
1678static 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
1688static 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
1698static 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
1708static 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
1718static 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
1729static 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
1739static 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
1749static 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
1761static 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
1799err_world_port_open:
1800 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1801err_request_rx_irq:
1802 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1803err_request_tx_irq:
1804 rocker_port_dma_rings_fini(rocker_port);
1805 return err;
1806}
1807
1808static 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
1824static 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
1854static 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
1881nest_cancel:
1882 rocker_tlv_nest_cancel(desc_info, frag);
1883unmap_frag:
1884 pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1885 return -EMSGSIZE;
1886}
1887
1888static 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
1939unmap_frags:
1940 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1941nest_cancel:
1942 rocker_tlv_nest_cancel(desc_info, frags);
1943out:
1944 dev_kfree_skb(skb);
1945 dev->stats.tx_dropped++;
1946
1947 return NETDEV_TX_OK;
1948}
1949
1950static 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
1966static 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
1988static 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
2003static 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
2014static 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
2026static 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
2041static 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
2068static 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
2099static 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
2120static 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
2139static 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
2146struct 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
2156static 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() */
2190static 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
2233static int
2234rocker_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
2242static int
2243rocker_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
2251static 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
2258static 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
2275static 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
2291static int
2292rocker_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
2315static int
2316rocker_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
2353static 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
2362static 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
2375static 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
2385static 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
2399static 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
2404static 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
2443static 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
2478static 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
2483static 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
2526static 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
2539static 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
2557static 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
2573static 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
2632err_world_port_init:
2633 rocker->ports[port_number] = NULL;
2634 unregister_netdev(dev);
2635err_register_netdev:
2636 rocker_world_port_post_fini(rocker_port);
2637err_world_port_pre_init:
2638err_world_check_init:
2639 free_netdev(dev);
2640 return err;
2641}
2642
2643static 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
2660remove_ports:
2661 rocker_remove_ports(rocker);
2662 return err;
2663}
2664
2665static 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
2694err_enable_msix:
2695 kfree(rocker->msix_entries);
2696 return err;
2697}
2698
2699static void rocker_msix_fini(const struct rocker *rocker)
2700{
2701 pci_disable_msix(rocker->pdev);
2702 kfree(rocker->msix_entries);
2703}
2704
2705static bool rocker_port_dev_check(const struct net_device *dev)
2706{
2707 return dev->netdev_ops == &rocker_port_netdev_ops;
2708}
2709
2710struct 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
2717static void
2718rocker_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
2729static 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() */
2763static 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
2804static struct notifier_block rocker_switchdev_notifier = {
2805 .notifier_call = rocker_switchdev_event,
2806};
2807
2808static 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
2932err_register_switchdev_notifier:
2933 unregister_fib_notifier(&rocker->fib_nb);
2934err_register_fib_notifier:
2935 rocker_remove_ports(rocker);
2936err_probe_ports:
2937 destroy_workqueue(rocker->rocker_owq);
2938err_alloc_ordered_workqueue:
2939 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2940err_request_event_irq:
2941 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2942err_request_cmd_irq:
2943 rocker_dma_rings_fini(rocker);
2944err_dma_rings_init:
2945err_basic_hw_test:
2946 rocker_msix_fini(rocker);
2947err_msix_init:
2948 iounmap(rocker->hw_addr);
2949err_ioremap:
2950err_pci_resource_len_check:
2951err_pci_set_dma_mask:
2952 pci_release_regions(pdev);
2953err_pci_request_regions:
2954 pci_disable_device(pdev);
2955err_pci_enable_device:
2956 kfree(rocker);
2957 return err;
2958}
2959
2960static 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
2979static 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
2990static 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
3005struct rocker_walk_data {
3006 struct rocker *rocker;
3007 struct rocker_port *port;
3008};
3009
3010static 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
3023struct 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
3038static 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 }
3069out:
3070 return NOTIFY_DONE;
3071}
3072
3073static 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
3081static 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
3107static struct notifier_block rocker_netevent_nb __read_mostly = {
3108 .notifier_call = rocker_netevent_event,
3109};
3110
3111/***********************
3112 * Module init and exit
3113 ***********************/
3114
3115static 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
3126err_pci_register_driver:
3127 unregister_netevent_notifier(&rocker_netevent_nb);
3128 unregister_netdevice_notifier(&rocker_netdevice_nb);
3129 return err;
3130}
3131
3132static 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
3139module_init(rocker_module_init);
3140module_exit(rocker_module_exit);
3141
3142MODULE_LICENSE("GPL v2");
3143MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3144MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3145MODULE_DESCRIPTION("Rocker switch device driver");
3146MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
4 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/interrupt.h>
12#include <linux/sched.h>
13#include <linux/wait.h>
14#include <linux/spinlock.h>
15#include <linux/sort.h>
16#include <linux/random.h>
17#include <linux/netdevice.h>
18#include <linux/skbuff.h>
19#include <linux/socket.h>
20#include <linux/etherdevice.h>
21#include <linux/ethtool.h>
22#include <linux/if_ether.h>
23#include <linux/if_vlan.h>
24#include <linux/if_bridge.h>
25#include <linux/bitops.h>
26#include <linux/ctype.h>
27#include <linux/workqueue.h>
28#include <net/switchdev.h>
29#include <net/rtnetlink.h>
30#include <net/netevent.h>
31#include <net/arp.h>
32#include <net/fib_rules.h>
33#include <net/fib_notifier.h>
34#include <linux/io-64-nonatomic-lo-hi.h>
35#include <generated/utsrelease.h>
36
37#include "rocker_hw.h"
38#include "rocker.h"
39#include "rocker_tlv.h"
40
41static const char rocker_driver_name[] = "rocker";
42
43static const struct pci_device_id rocker_pci_id_table[] = {
44 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
45 {0, }
46};
47
48struct rocker_wait {
49 wait_queue_head_t wait;
50 bool done;
51 bool nowait;
52};
53
54static void rocker_wait_reset(struct rocker_wait *wait)
55{
56 wait->done = false;
57 wait->nowait = false;
58}
59
60static void rocker_wait_init(struct rocker_wait *wait)
61{
62 init_waitqueue_head(&wait->wait);
63 rocker_wait_reset(wait);
64}
65
66static struct rocker_wait *rocker_wait_create(void)
67{
68 struct rocker_wait *wait;
69
70 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
71 if (!wait)
72 return NULL;
73 return wait;
74}
75
76static void rocker_wait_destroy(struct rocker_wait *wait)
77{
78 kfree(wait);
79}
80
81static bool rocker_wait_event_timeout(struct rocker_wait *wait,
82 unsigned long timeout)
83{
84 wait_event_timeout(wait->wait, wait->done, HZ / 10);
85 if (!wait->done)
86 return false;
87 return true;
88}
89
90static void rocker_wait_wake_up(struct rocker_wait *wait)
91{
92 wait->done = true;
93 wake_up(&wait->wait);
94}
95
96static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
97{
98 return rocker->msix_entries[vector].vector;
99}
100
101static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
102{
103 return rocker_msix_vector(rocker_port->rocker,
104 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
105}
106
107static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
108{
109 return rocker_msix_vector(rocker_port->rocker,
110 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
111}
112
113#define rocker_write32(rocker, reg, val) \
114 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
115#define rocker_read32(rocker, reg) \
116 readl((rocker)->hw_addr + (ROCKER_ ## reg))
117#define rocker_write64(rocker, reg, val) \
118 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119#define rocker_read64(rocker, reg) \
120 readq((rocker)->hw_addr + (ROCKER_ ## reg))
121
122/*****************************
123 * HW basic testing functions
124 *****************************/
125
126static int rocker_reg_test(const struct rocker *rocker)
127{
128 const struct pci_dev *pdev = rocker->pdev;
129 u64 test_reg;
130 u64 rnd;
131
132 rnd = get_random_u32();
133 rnd >>= 1;
134 rocker_write32(rocker, TEST_REG, rnd);
135 test_reg = rocker_read32(rocker, TEST_REG);
136 if (test_reg != rnd * 2) {
137 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
138 test_reg, rnd * 2);
139 return -EIO;
140 }
141
142 rnd = get_random_u32();
143 rnd <<= 31;
144 rnd |= get_random_u32();
145 rocker_write64(rocker, TEST_REG64, rnd);
146 test_reg = rocker_read64(rocker, TEST_REG64);
147 if (test_reg != rnd * 2) {
148 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
149 test_reg, rnd * 2);
150 return -EIO;
151 }
152
153 return 0;
154}
155
156static int rocker_dma_test_one(const struct rocker *rocker,
157 struct rocker_wait *wait, u32 test_type,
158 dma_addr_t dma_handle, const unsigned char *buf,
159 const unsigned char *expect, size_t size)
160{
161 const struct pci_dev *pdev = rocker->pdev;
162 int i;
163
164 rocker_wait_reset(wait);
165 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
166
167 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
168 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
169 return -EIO;
170 }
171
172 for (i = 0; i < size; i++) {
173 if (buf[i] != expect[i]) {
174 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
175 buf[i], i, expect[i]);
176 return -EIO;
177 }
178 }
179 return 0;
180}
181
182#define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
183#define ROCKER_TEST_DMA_FILL_PATTERN 0x96
184
185static int rocker_dma_test_offset(const struct rocker *rocker,
186 struct rocker_wait *wait, int offset)
187{
188 struct pci_dev *pdev = rocker->pdev;
189 unsigned char *alloc;
190 unsigned char *buf;
191 unsigned char *expect;
192 dma_addr_t dma_handle;
193 int i;
194 int err;
195
196 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
197 GFP_KERNEL | GFP_DMA);
198 if (!alloc)
199 return -ENOMEM;
200 buf = alloc + offset;
201 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
202
203 dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
204 DMA_BIDIRECTIONAL);
205 if (dma_mapping_error(&pdev->dev, dma_handle)) {
206 err = -EIO;
207 goto free_alloc;
208 }
209
210 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
211 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
212
213 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
214 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
215 dma_handle, buf, expect,
216 ROCKER_TEST_DMA_BUF_SIZE);
217 if (err)
218 goto unmap;
219
220 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
221 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
222 dma_handle, buf, expect,
223 ROCKER_TEST_DMA_BUF_SIZE);
224 if (err)
225 goto unmap;
226
227 get_random_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
228 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
229 expect[i] = ~buf[i];
230 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
231 dma_handle, buf, expect,
232 ROCKER_TEST_DMA_BUF_SIZE);
233 if (err)
234 goto unmap;
235
236unmap:
237 dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
238 DMA_BIDIRECTIONAL);
239free_alloc:
240 kfree(alloc);
241
242 return err;
243}
244
245static int rocker_dma_test(const struct rocker *rocker,
246 struct rocker_wait *wait)
247{
248 int i;
249 int err;
250
251 for (i = 0; i < 8; i++) {
252 err = rocker_dma_test_offset(rocker, wait, i);
253 if (err)
254 return err;
255 }
256 return 0;
257}
258
259static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
260{
261 struct rocker_wait *wait = dev_id;
262
263 rocker_wait_wake_up(wait);
264
265 return IRQ_HANDLED;
266}
267
268static int rocker_basic_hw_test(const struct rocker *rocker)
269{
270 const struct pci_dev *pdev = rocker->pdev;
271 struct rocker_wait wait;
272 int err;
273
274 err = rocker_reg_test(rocker);
275 if (err) {
276 dev_err(&pdev->dev, "reg test failed\n");
277 return err;
278 }
279
280 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
281 rocker_test_irq_handler, 0,
282 rocker_driver_name, &wait);
283 if (err) {
284 dev_err(&pdev->dev, "cannot assign test irq\n");
285 return err;
286 }
287
288 rocker_wait_init(&wait);
289 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
290
291 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
292 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
293 err = -EIO;
294 goto free_irq;
295 }
296
297 err = rocker_dma_test(rocker, &wait);
298 if (err)
299 dev_err(&pdev->dev, "dma test failed\n");
300
301free_irq:
302 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
303 return err;
304}
305
306/******************************************
307 * DMA rings and descriptors manipulations
308 ******************************************/
309
310static u32 __pos_inc(u32 pos, size_t limit)
311{
312 return ++pos == limit ? 0 : pos;
313}
314
315static int rocker_desc_err(const struct rocker_desc_info *desc_info)
316{
317 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
318
319 switch (err) {
320 case ROCKER_OK:
321 return 0;
322 case -ROCKER_ENOENT:
323 return -ENOENT;
324 case -ROCKER_ENXIO:
325 return -ENXIO;
326 case -ROCKER_ENOMEM:
327 return -ENOMEM;
328 case -ROCKER_EEXIST:
329 return -EEXIST;
330 case -ROCKER_EINVAL:
331 return -EINVAL;
332 case -ROCKER_EMSGSIZE:
333 return -EMSGSIZE;
334 case -ROCKER_ENOTSUP:
335 return -EOPNOTSUPP;
336 case -ROCKER_ENOBUFS:
337 return -ENOBUFS;
338 }
339
340 return -EINVAL;
341}
342
343static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
344{
345 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
346}
347
348static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
349{
350 u32 comp_err = desc_info->desc->comp_err;
351
352 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
353}
354
355static void *
356rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
357{
358 return (void *)(uintptr_t)desc_info->desc->cookie;
359}
360
361static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
362 void *ptr)
363{
364 desc_info->desc->cookie = (uintptr_t) ptr;
365}
366
367static struct rocker_desc_info *
368rocker_desc_head_get(const struct rocker_dma_ring_info *info)
369{
370 struct rocker_desc_info *desc_info;
371 u32 head = __pos_inc(info->head, info->size);
372
373 desc_info = &info->desc_info[info->head];
374 if (head == info->tail)
375 return NULL; /* ring full */
376 desc_info->tlv_size = 0;
377 return desc_info;
378}
379
380static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
381{
382 desc_info->desc->buf_size = desc_info->data_size;
383 desc_info->desc->tlv_size = desc_info->tlv_size;
384}
385
386static void rocker_desc_head_set(const struct rocker *rocker,
387 struct rocker_dma_ring_info *info,
388 const struct rocker_desc_info *desc_info)
389{
390 u32 head = __pos_inc(info->head, info->size);
391
392 BUG_ON(head == info->tail);
393 rocker_desc_commit(desc_info);
394 info->head = head;
395 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
396}
397
398static struct rocker_desc_info *
399rocker_desc_tail_get(struct rocker_dma_ring_info *info)
400{
401 struct rocker_desc_info *desc_info;
402
403 if (info->tail == info->head)
404 return NULL; /* nothing to be done between head and tail */
405 desc_info = &info->desc_info[info->tail];
406 if (!rocker_desc_gen(desc_info))
407 return NULL; /* gen bit not set, desc is not ready yet */
408 info->tail = __pos_inc(info->tail, info->size);
409 desc_info->tlv_size = desc_info->desc->tlv_size;
410 return desc_info;
411}
412
413static void rocker_dma_ring_credits_set(const struct rocker *rocker,
414 const struct rocker_dma_ring_info *info,
415 u32 credits)
416{
417 if (credits)
418 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
419}
420
421static unsigned long rocker_dma_ring_size_fix(size_t size)
422{
423 return max(ROCKER_DMA_SIZE_MIN,
424 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
425}
426
427static int rocker_dma_ring_create(const struct rocker *rocker,
428 unsigned int type,
429 size_t size,
430 struct rocker_dma_ring_info *info)
431{
432 int i;
433
434 BUG_ON(size != rocker_dma_ring_size_fix(size));
435 info->size = size;
436 info->type = type;
437 info->head = 0;
438 info->tail = 0;
439 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
440 GFP_KERNEL);
441 if (!info->desc_info)
442 return -ENOMEM;
443
444 info->desc = dma_alloc_coherent(&rocker->pdev->dev,
445 info->size * sizeof(*info->desc),
446 &info->mapaddr, GFP_KERNEL);
447 if (!info->desc) {
448 kfree(info->desc_info);
449 return -ENOMEM;
450 }
451
452 for (i = 0; i < info->size; i++)
453 info->desc_info[i].desc = &info->desc[i];
454
455 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
456 ROCKER_DMA_DESC_CTRL_RESET);
457 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
458 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
459
460 return 0;
461}
462
463static void rocker_dma_ring_destroy(const struct rocker *rocker,
464 const struct rocker_dma_ring_info *info)
465{
466 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
467
468 dma_free_coherent(&rocker->pdev->dev,
469 info->size * sizeof(struct rocker_desc), info->desc,
470 info->mapaddr);
471 kfree(info->desc_info);
472}
473
474static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
475 struct rocker_dma_ring_info *info)
476{
477 int i;
478
479 BUG_ON(info->head || info->tail);
480
481 /* When ring is consumer, we need to advance head for each desc.
482 * That tells hw that the desc is ready to be used by it.
483 */
484 for (i = 0; i < info->size - 1; i++)
485 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
486 rocker_desc_commit(&info->desc_info[i]);
487}
488
489static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
490 const struct rocker_dma_ring_info *info,
491 int direction, size_t buf_size)
492{
493 struct pci_dev *pdev = rocker->pdev;
494 int i;
495 int err;
496
497 for (i = 0; i < info->size; i++) {
498 struct rocker_desc_info *desc_info = &info->desc_info[i];
499 struct rocker_desc *desc = &info->desc[i];
500 dma_addr_t dma_handle;
501 char *buf;
502
503 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
504 if (!buf) {
505 err = -ENOMEM;
506 goto rollback;
507 }
508
509 dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
510 direction);
511 if (dma_mapping_error(&pdev->dev, dma_handle)) {
512 kfree(buf);
513 err = -EIO;
514 goto rollback;
515 }
516
517 desc_info->data = buf;
518 desc_info->data_size = buf_size;
519 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
520
521 desc->buf_addr = dma_handle;
522 desc->buf_size = buf_size;
523 }
524 return 0;
525
526rollback:
527 for (i--; i >= 0; i--) {
528 const struct rocker_desc_info *desc_info = &info->desc_info[i];
529
530 dma_unmap_single(&pdev->dev,
531 dma_unmap_addr(desc_info, mapaddr),
532 desc_info->data_size, direction);
533 kfree(desc_info->data);
534 }
535 return err;
536}
537
538static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
539 const struct rocker_dma_ring_info *info,
540 int direction)
541{
542 struct pci_dev *pdev = rocker->pdev;
543 int i;
544
545 for (i = 0; i < info->size; i++) {
546 const struct rocker_desc_info *desc_info = &info->desc_info[i];
547 struct rocker_desc *desc = &info->desc[i];
548
549 desc->buf_addr = 0;
550 desc->buf_size = 0;
551 dma_unmap_single(&pdev->dev,
552 dma_unmap_addr(desc_info, mapaddr),
553 desc_info->data_size, direction);
554 kfree(desc_info->data);
555 }
556}
557
558static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
559{
560 struct rocker_wait *wait;
561
562 wait = rocker_wait_create();
563 if (!wait)
564 return -ENOMEM;
565 rocker_desc_cookie_ptr_set(desc_info, wait);
566 return 0;
567}
568
569static void
570rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
571{
572 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
573
574 rocker_wait_destroy(wait);
575}
576
577static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
578{
579 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
580 int i;
581 int err;
582
583 for (i = 0; i < cmd_ring->size; i++) {
584 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
585 if (err)
586 goto rollback;
587 }
588 return 0;
589
590rollback:
591 for (i--; i >= 0; i--)
592 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
593 return err;
594}
595
596static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
597{
598 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
599 int i;
600
601 for (i = 0; i < cmd_ring->size; i++)
602 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
603}
604
605static int rocker_dma_rings_init(struct rocker *rocker)
606{
607 const struct pci_dev *pdev = rocker->pdev;
608 int err;
609
610 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
611 ROCKER_DMA_CMD_DEFAULT_SIZE,
612 &rocker->cmd_ring);
613 if (err) {
614 dev_err(&pdev->dev, "failed to create command dma ring\n");
615 return err;
616 }
617
618 spin_lock_init(&rocker->cmd_ring_lock);
619
620 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
621 DMA_BIDIRECTIONAL, PAGE_SIZE);
622 if (err) {
623 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
624 goto err_dma_cmd_ring_bufs_alloc;
625 }
626
627 err = rocker_dma_cmd_ring_waits_alloc(rocker);
628 if (err) {
629 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
630 goto err_dma_cmd_ring_waits_alloc;
631 }
632
633 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
634 ROCKER_DMA_EVENT_DEFAULT_SIZE,
635 &rocker->event_ring);
636 if (err) {
637 dev_err(&pdev->dev, "failed to create event dma ring\n");
638 goto err_dma_event_ring_create;
639 }
640
641 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
642 DMA_FROM_DEVICE, PAGE_SIZE);
643 if (err) {
644 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
645 goto err_dma_event_ring_bufs_alloc;
646 }
647 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
648 return 0;
649
650err_dma_event_ring_bufs_alloc:
651 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
652err_dma_event_ring_create:
653 rocker_dma_cmd_ring_waits_free(rocker);
654err_dma_cmd_ring_waits_alloc:
655 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
656 DMA_BIDIRECTIONAL);
657err_dma_cmd_ring_bufs_alloc:
658 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
659 return err;
660}
661
662static void rocker_dma_rings_fini(struct rocker *rocker)
663{
664 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
665 DMA_BIDIRECTIONAL);
666 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
667 rocker_dma_cmd_ring_waits_free(rocker);
668 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
669 DMA_BIDIRECTIONAL);
670 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
671}
672
673static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
674 struct rocker_desc_info *desc_info,
675 struct sk_buff *skb, size_t buf_len)
676{
677 const struct rocker *rocker = rocker_port->rocker;
678 struct pci_dev *pdev = rocker->pdev;
679 dma_addr_t dma_handle;
680
681 dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
682 DMA_FROM_DEVICE);
683 if (dma_mapping_error(&pdev->dev, dma_handle))
684 return -EIO;
685 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
686 goto tlv_put_failure;
687 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
688 goto tlv_put_failure;
689 return 0;
690
691tlv_put_failure:
692 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
693 desc_info->tlv_size = 0;
694 return -EMSGSIZE;
695}
696
697static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
698{
699 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
700}
701
702static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
703 struct rocker_desc_info *desc_info)
704{
705 struct net_device *dev = rocker_port->dev;
706 struct sk_buff *skb;
707 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
708 int err;
709
710 /* Ensure that hw will see tlv_size zero in case of an error.
711 * That tells hw to use another descriptor.
712 */
713 rocker_desc_cookie_ptr_set(desc_info, NULL);
714 desc_info->tlv_size = 0;
715
716 skb = netdev_alloc_skb_ip_align(dev, buf_len);
717 if (!skb)
718 return -ENOMEM;
719 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
720 if (err) {
721 dev_kfree_skb_any(skb);
722 return err;
723 }
724 rocker_desc_cookie_ptr_set(desc_info, skb);
725 return 0;
726}
727
728static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
729 const struct rocker_tlv **attrs)
730{
731 struct pci_dev *pdev = rocker->pdev;
732 dma_addr_t dma_handle;
733 size_t len;
734
735 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
736 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
737 return;
738 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
739 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
740 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
741}
742
743static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
744 const struct rocker_desc_info *desc_info)
745{
746 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
747 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
748
749 if (!skb)
750 return;
751 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
752 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
753 dev_kfree_skb_any(skb);
754}
755
756static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
757{
758 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
759 const struct rocker *rocker = rocker_port->rocker;
760 int i;
761 int err;
762
763 for (i = 0; i < rx_ring->size; i++) {
764 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
765 &rx_ring->desc_info[i]);
766 if (err)
767 goto rollback;
768 }
769 return 0;
770
771rollback:
772 for (i--; i >= 0; i--)
773 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
774 return err;
775}
776
777static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
778{
779 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
780 const struct rocker *rocker = rocker_port->rocker;
781 int i;
782
783 for (i = 0; i < rx_ring->size; i++)
784 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
785}
786
787static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
788{
789 struct rocker *rocker = rocker_port->rocker;
790 int err;
791
792 err = rocker_dma_ring_create(rocker,
793 ROCKER_DMA_TX(rocker_port->port_number),
794 ROCKER_DMA_TX_DEFAULT_SIZE,
795 &rocker_port->tx_ring);
796 if (err) {
797 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
798 return err;
799 }
800
801 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
802 DMA_TO_DEVICE,
803 ROCKER_DMA_TX_DESC_SIZE);
804 if (err) {
805 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
806 goto err_dma_tx_ring_bufs_alloc;
807 }
808
809 err = rocker_dma_ring_create(rocker,
810 ROCKER_DMA_RX(rocker_port->port_number),
811 ROCKER_DMA_RX_DEFAULT_SIZE,
812 &rocker_port->rx_ring);
813 if (err) {
814 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
815 goto err_dma_rx_ring_create;
816 }
817
818 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
819 DMA_BIDIRECTIONAL,
820 ROCKER_DMA_RX_DESC_SIZE);
821 if (err) {
822 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
823 goto err_dma_rx_ring_bufs_alloc;
824 }
825
826 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
827 if (err) {
828 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
829 goto err_dma_rx_ring_skbs_alloc;
830 }
831 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
832
833 return 0;
834
835err_dma_rx_ring_skbs_alloc:
836 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
837 DMA_BIDIRECTIONAL);
838err_dma_rx_ring_bufs_alloc:
839 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
840err_dma_rx_ring_create:
841 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
842 DMA_TO_DEVICE);
843err_dma_tx_ring_bufs_alloc:
844 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
845 return err;
846}
847
848static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
849{
850 struct rocker *rocker = rocker_port->rocker;
851
852 rocker_dma_rx_ring_skbs_free(rocker_port);
853 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
854 DMA_BIDIRECTIONAL);
855 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
856 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
857 DMA_TO_DEVICE);
858 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
859}
860
861static void rocker_port_set_enable(const struct rocker_port *rocker_port,
862 bool enable)
863{
864 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
865
866 if (enable)
867 val |= 1ULL << rocker_port->pport;
868 else
869 val &= ~(1ULL << rocker_port->pport);
870 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
871}
872
873/********************************
874 * Interrupt handler and helpers
875 ********************************/
876
877static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
878{
879 struct rocker *rocker = dev_id;
880 const struct rocker_desc_info *desc_info;
881 struct rocker_wait *wait;
882 u32 credits = 0;
883
884 spin_lock(&rocker->cmd_ring_lock);
885 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
886 wait = rocker_desc_cookie_ptr_get(desc_info);
887 if (wait->nowait) {
888 rocker_desc_gen_clear(desc_info);
889 } else {
890 rocker_wait_wake_up(wait);
891 }
892 credits++;
893 }
894 spin_unlock(&rocker->cmd_ring_lock);
895 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
896
897 return IRQ_HANDLED;
898}
899
900static void rocker_port_link_up(const struct rocker_port *rocker_port)
901{
902 netif_carrier_on(rocker_port->dev);
903 netdev_info(rocker_port->dev, "Link is up\n");
904}
905
906static void rocker_port_link_down(const struct rocker_port *rocker_port)
907{
908 netif_carrier_off(rocker_port->dev);
909 netdev_info(rocker_port->dev, "Link is down\n");
910}
911
912static int rocker_event_link_change(const struct rocker *rocker,
913 const struct rocker_tlv *info)
914{
915 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
916 unsigned int port_number;
917 bool link_up;
918 struct rocker_port *rocker_port;
919
920 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
921 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
922 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
923 return -EIO;
924 port_number =
925 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
926 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
927
928 if (port_number >= rocker->port_count)
929 return -EINVAL;
930
931 rocker_port = rocker->ports[port_number];
932 if (netif_carrier_ok(rocker_port->dev) != link_up) {
933 if (link_up)
934 rocker_port_link_up(rocker_port);
935 else
936 rocker_port_link_down(rocker_port);
937 }
938
939 return 0;
940}
941
942static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
943 const unsigned char *addr,
944 __be16 vlan_id);
945
946static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
947 const struct rocker_tlv *info)
948{
949 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
950 unsigned int port_number;
951 struct rocker_port *rocker_port;
952 const unsigned char *addr;
953 __be16 vlan_id;
954
955 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
956 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
957 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
958 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
959 return -EIO;
960 port_number =
961 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
962 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
963 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
964
965 if (port_number >= rocker->port_count)
966 return -EINVAL;
967
968 rocker_port = rocker->ports[port_number];
969 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
970}
971
972static int rocker_event_process(const struct rocker *rocker,
973 const struct rocker_desc_info *desc_info)
974{
975 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
976 const struct rocker_tlv *info;
977 u16 type;
978
979 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
980 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
981 !attrs[ROCKER_TLV_EVENT_INFO])
982 return -EIO;
983
984 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
985 info = attrs[ROCKER_TLV_EVENT_INFO];
986
987 switch (type) {
988 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
989 return rocker_event_link_change(rocker, info);
990 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
991 return rocker_event_mac_vlan_seen(rocker, info);
992 }
993
994 return -EOPNOTSUPP;
995}
996
997static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
998{
999 struct rocker *rocker = dev_id;
1000 const struct pci_dev *pdev = rocker->pdev;
1001 const struct rocker_desc_info *desc_info;
1002 u32 credits = 0;
1003 int err;
1004
1005 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1006 err = rocker_desc_err(desc_info);
1007 if (err) {
1008 dev_err(&pdev->dev, "event desc received with err %d\n",
1009 err);
1010 } else {
1011 err = rocker_event_process(rocker, desc_info);
1012 if (err)
1013 dev_err(&pdev->dev, "event processing failed with err %d\n",
1014 err);
1015 }
1016 rocker_desc_gen_clear(desc_info);
1017 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1018 credits++;
1019 }
1020 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1021
1022 return IRQ_HANDLED;
1023}
1024
1025static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026{
1027 struct rocker_port *rocker_port = dev_id;
1028
1029 napi_schedule(&rocker_port->napi_tx);
1030 return IRQ_HANDLED;
1031}
1032
1033static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034{
1035 struct rocker_port *rocker_port = dev_id;
1036
1037 napi_schedule(&rocker_port->napi_rx);
1038 return IRQ_HANDLED;
1039}
1040
1041/********************
1042 * Command interface
1043 ********************/
1044
1045int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047 rocker_cmd_proc_cb_t process, void *process_priv)
1048{
1049 struct rocker *rocker = rocker_port->rocker;
1050 struct rocker_desc_info *desc_info;
1051 struct rocker_wait *wait;
1052 unsigned long lock_flags;
1053 int err;
1054
1055 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1058 if (!desc_info) {
1059 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1060 return -EAGAIN;
1061 }
1062
1063 wait = rocker_desc_cookie_ptr_get(desc_info);
1064 rocker_wait_init(wait);
1065 wait->nowait = nowait;
1066
1067 err = prepare(rocker_port, desc_info, prepare_priv);
1068 if (err) {
1069 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1070 return err;
1071 }
1072
1073 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1074
1075 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1076
1077 if (nowait)
1078 return 0;
1079
1080 if (!rocker_wait_event_timeout(wait, HZ / 10))
1081 return -EIO;
1082
1083 err = rocker_desc_err(desc_info);
1084 if (err)
1085 return err;
1086
1087 if (process)
1088 err = process(rocker_port, desc_info, process_priv);
1089
1090 rocker_desc_gen_clear(desc_info);
1091 return err;
1092}
1093
1094static int
1095rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096 struct rocker_desc_info *desc_info,
1097 void *priv)
1098{
1099 struct rocker_tlv *cmd_info;
1100
1101 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1102 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1103 return -EMSGSIZE;
1104 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1105 if (!cmd_info)
1106 return -EMSGSIZE;
1107 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1108 rocker_port->pport))
1109 return -EMSGSIZE;
1110 rocker_tlv_nest_end(desc_info, cmd_info);
1111 return 0;
1112}
1113
1114static int
1115rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116 const struct rocker_desc_info *desc_info,
1117 void *priv)
1118{
1119 struct ethtool_link_ksettings *ecmd = priv;
1120 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122 u32 speed;
1123 u8 duplex;
1124 u8 autoneg;
1125
1126 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1127 if (!attrs[ROCKER_TLV_CMD_INFO])
1128 return -EIO;
1129
1130 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1131 attrs[ROCKER_TLV_CMD_INFO]);
1132 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1133 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1134 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1135 return -EIO;
1136
1137 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1138 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1139 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1140
1141 ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1142 ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1143
1144 ecmd->base.phy_address = 0xff;
1145 ecmd->base.port = PORT_TP;
1146 ecmd->base.speed = speed;
1147 ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1148 ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1149
1150 return 0;
1151}
1152
1153static int
1154rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155 const struct rocker_desc_info *desc_info,
1156 void *priv)
1157{
1158 unsigned char *macaddr = priv;
1159 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161 const struct rocker_tlv *attr;
1162
1163 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1164 if (!attrs[ROCKER_TLV_CMD_INFO])
1165 return -EIO;
1166
1167 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1168 attrs[ROCKER_TLV_CMD_INFO]);
1169 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1170 if (!attr)
1171 return -EIO;
1172
1173 if (rocker_tlv_len(attr) != ETH_ALEN)
1174 return -EINVAL;
1175
1176 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1177 return 0;
1178}
1179
1180static int
1181rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182 const struct rocker_desc_info *desc_info,
1183 void *priv)
1184{
1185 u8 *p_mode = priv;
1186 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188 const struct rocker_tlv *attr;
1189
1190 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1191 if (!attrs[ROCKER_TLV_CMD_INFO])
1192 return -EIO;
1193
1194 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1195 attrs[ROCKER_TLV_CMD_INFO]);
1196 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1197 if (!attr)
1198 return -EIO;
1199
1200 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1201 return 0;
1202}
1203
1204struct port_name {
1205 char *buf;
1206 size_t len;
1207};
1208
1209static int
1210rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211 const struct rocker_desc_info *desc_info,
1212 void *priv)
1213{
1214 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216 struct port_name *name = priv;
1217 const struct rocker_tlv *attr;
1218 size_t i, j, len;
1219 const char *str;
1220
1221 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1222 if (!attrs[ROCKER_TLV_CMD_INFO])
1223 return -EIO;
1224
1225 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1226 attrs[ROCKER_TLV_CMD_INFO]);
1227 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1228 if (!attr)
1229 return -EIO;
1230
1231 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1232 str = rocker_tlv_data(attr);
1233
1234 /* make sure name only contains alphanumeric characters */
1235 for (i = j = 0; i < len; ++i) {
1236 if (isalnum(str[i])) {
1237 name->buf[j] = str[i];
1238 j++;
1239 }
1240 }
1241
1242 if (j == 0)
1243 return -EIO;
1244
1245 name->buf[j] = '\0';
1246
1247 return 0;
1248}
1249
1250static int
1251rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252 struct rocker_desc_info *desc_info,
1253 void *priv)
1254{
1255 struct ethtool_link_ksettings *ecmd = priv;
1256 struct rocker_tlv *cmd_info;
1257
1258 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1259 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1260 return -EMSGSIZE;
1261 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1262 if (!cmd_info)
1263 return -EMSGSIZE;
1264 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1265 rocker_port->pport))
1266 return -EMSGSIZE;
1267 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1268 ecmd->base.speed))
1269 return -EMSGSIZE;
1270 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1271 ecmd->base.duplex))
1272 return -EMSGSIZE;
1273 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1274 ecmd->base.autoneg))
1275 return -EMSGSIZE;
1276 rocker_tlv_nest_end(desc_info, cmd_info);
1277 return 0;
1278}
1279
1280static int
1281rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282 struct rocker_desc_info *desc_info,
1283 void *priv)
1284{
1285 const unsigned char *macaddr = priv;
1286 struct rocker_tlv *cmd_info;
1287
1288 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1289 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1290 return -EMSGSIZE;
1291 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1292 if (!cmd_info)
1293 return -EMSGSIZE;
1294 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1295 rocker_port->pport))
1296 return -EMSGSIZE;
1297 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1298 ETH_ALEN, macaddr))
1299 return -EMSGSIZE;
1300 rocker_tlv_nest_end(desc_info, cmd_info);
1301 return 0;
1302}
1303
1304static int
1305rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306 struct rocker_desc_info *desc_info,
1307 void *priv)
1308{
1309 int mtu = *(int *)priv;
1310 struct rocker_tlv *cmd_info;
1311
1312 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1313 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1314 return -EMSGSIZE;
1315 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1316 if (!cmd_info)
1317 return -EMSGSIZE;
1318 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1319 rocker_port->pport))
1320 return -EMSGSIZE;
1321 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1322 mtu))
1323 return -EMSGSIZE;
1324 rocker_tlv_nest_end(desc_info, cmd_info);
1325 return 0;
1326}
1327
1328static int
1329rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330 struct rocker_desc_info *desc_info,
1331 void *priv)
1332{
1333 bool learning = *(bool *)priv;
1334 struct rocker_tlv *cmd_info;
1335
1336 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1337 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1338 return -EMSGSIZE;
1339 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1340 if (!cmd_info)
1341 return -EMSGSIZE;
1342 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1343 rocker_port->pport))
1344 return -EMSGSIZE;
1345 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1346 learning))
1347 return -EMSGSIZE;
1348 rocker_tlv_nest_end(desc_info, cmd_info);
1349 return 0;
1350}
1351
1352static int
1353rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354 struct ethtool_link_ksettings *ecmd)
1355{
1356 return rocker_cmd_exec(rocker_port, false,
1357 rocker_cmd_get_port_settings_prep, NULL,
1358 rocker_cmd_get_port_settings_ethtool_proc,
1359 ecmd);
1360}
1361
1362static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363 unsigned char *macaddr)
1364{
1365 return rocker_cmd_exec(rocker_port, false,
1366 rocker_cmd_get_port_settings_prep, NULL,
1367 rocker_cmd_get_port_settings_macaddr_proc,
1368 macaddr);
1369}
1370
1371static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372 u8 *p_mode)
1373{
1374 return rocker_cmd_exec(rocker_port, false,
1375 rocker_cmd_get_port_settings_prep, NULL,
1376 rocker_cmd_get_port_settings_mode_proc, p_mode);
1377}
1378
1379static int
1380rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381 const struct ethtool_link_ksettings *ecmd)
1382{
1383 struct ethtool_link_ksettings copy_ecmd;
1384
1385 memcpy(©_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387 return rocker_cmd_exec(rocker_port, false,
1388 rocker_cmd_set_port_settings_ethtool_prep,
1389 ©_ecmd, NULL, NULL);
1390}
1391
1392static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393 unsigned char *macaddr)
1394{
1395 return rocker_cmd_exec(rocker_port, false,
1396 rocker_cmd_set_port_settings_macaddr_prep,
1397 macaddr, NULL, NULL);
1398}
1399
1400static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401 int mtu)
1402{
1403 return rocker_cmd_exec(rocker_port, false,
1404 rocker_cmd_set_port_settings_mtu_prep,
1405 &mtu, NULL, NULL);
1406}
1407
1408int rocker_port_set_learning(struct rocker_port *rocker_port,
1409 bool learning)
1410{
1411 return rocker_cmd_exec(rocker_port, false,
1412 rocker_cmd_set_port_learning_prep,
1413 &learning, NULL, NULL);
1414}
1415
1416/**********************
1417 * Worlds manipulation
1418 **********************/
1419
1420static struct rocker_world_ops *rocker_world_ops[] = {
1421 &rocker_ofdpa_ops,
1422};
1423
1424#define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427{
1428 int i;
1429
1430 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431 if (rocker_world_ops[i]->mode == mode)
1432 return rocker_world_ops[i];
1433 return NULL;
1434}
1435
1436static int rocker_world_init(struct rocker *rocker, u8 mode)
1437{
1438 struct rocker_world_ops *wops;
1439 int err;
1440
1441 wops = rocker_world_ops_find(mode);
1442 if (!wops) {
1443 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444 mode);
1445 return -EINVAL;
1446 }
1447 rocker->wops = wops;
1448 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1449 if (!rocker->wpriv)
1450 return -ENOMEM;
1451 if (!wops->init)
1452 return 0;
1453 err = wops->init(rocker);
1454 if (err)
1455 kfree(rocker->wpriv);
1456 return err;
1457}
1458
1459static void rocker_world_fini(struct rocker *rocker)
1460{
1461 struct rocker_world_ops *wops = rocker->wops;
1462
1463 if (!wops || !wops->fini)
1464 return;
1465 wops->fini(rocker);
1466 kfree(rocker->wpriv);
1467}
1468
1469static int rocker_world_check_init(struct rocker_port *rocker_port)
1470{
1471 struct rocker *rocker = rocker_port->rocker;
1472 u8 mode;
1473 int err;
1474
1475 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1476 if (err) {
1477 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478 return err;
1479 }
1480 if (rocker->wops) {
1481 if (rocker->wops->mode != mode) {
1482 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483 return -EINVAL;
1484 }
1485 return 0;
1486 }
1487 return rocker_world_init(rocker, mode);
1488}
1489
1490static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491{
1492 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493 int err;
1494
1495 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1496 if (!rocker_port->wpriv)
1497 return -ENOMEM;
1498 if (!wops->port_pre_init)
1499 return 0;
1500 err = wops->port_pre_init(rocker_port);
1501 if (err)
1502 kfree(rocker_port->wpriv);
1503 return 0;
1504}
1505
1506static int rocker_world_port_init(struct rocker_port *rocker_port)
1507{
1508 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510 if (!wops->port_init)
1511 return 0;
1512 return wops->port_init(rocker_port);
1513}
1514
1515static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516{
1517 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519 if (!wops->port_fini)
1520 return;
1521 wops->port_fini(rocker_port);
1522}
1523
1524static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525{
1526 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528 if (!wops->port_post_fini)
1529 return;
1530 wops->port_post_fini(rocker_port);
1531 kfree(rocker_port->wpriv);
1532}
1533
1534static int rocker_world_port_open(struct rocker_port *rocker_port)
1535{
1536 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538 if (!wops->port_open)
1539 return 0;
1540 return wops->port_open(rocker_port);
1541}
1542
1543static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544{
1545 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547 if (!wops->port_stop)
1548 return;
1549 wops->port_stop(rocker_port);
1550}
1551
1552static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553 u8 state)
1554{
1555 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1556
1557 if (!wops->port_attr_stp_state_set)
1558 return -EOPNOTSUPP;
1559
1560 return wops->port_attr_stp_state_set(rocker_port, state);
1561}
1562
1563static int
1564rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1565 rocker_port,
1566 unsigned long *
1567 p_brport_flags_support)
1568{
1569 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1570
1571 if (!wops->port_attr_bridge_flags_support_get)
1572 return -EOPNOTSUPP;
1573 return wops->port_attr_bridge_flags_support_get(rocker_port,
1574 p_brport_flags_support);
1575}
1576
1577static int
1578rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1579 struct switchdev_brport_flags flags)
1580{
1581 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1582 unsigned long brport_flags_s;
1583 int err;
1584
1585 if (!wops->port_attr_bridge_flags_set)
1586 return -EOPNOTSUPP;
1587
1588 err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1589 &brport_flags_s);
1590 if (err)
1591 return err;
1592
1593 if (flags.mask & ~brport_flags_s)
1594 return -EINVAL;
1595
1596 return 0;
1597}
1598
1599static int
1600rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1601 struct switchdev_brport_flags flags)
1602{
1603 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1604
1605 if (!wops->port_attr_bridge_flags_set)
1606 return -EOPNOTSUPP;
1607
1608 return wops->port_attr_bridge_flags_set(rocker_port, flags.val);
1609}
1610
1611static int
1612rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1613 u32 ageing_time)
1614{
1615 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1616
1617 if (!wops->port_attr_bridge_ageing_time_set)
1618 return -EOPNOTSUPP;
1619
1620 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time);
1621}
1622
1623static int
1624rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1625 const struct switchdev_obj_port_vlan *vlan)
1626{
1627 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629 if (!wops->port_obj_vlan_add)
1630 return -EOPNOTSUPP;
1631
1632 return wops->port_obj_vlan_add(rocker_port, vlan);
1633}
1634
1635static int
1636rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1637 const struct switchdev_obj_port_vlan *vlan)
1638{
1639 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1640
1641 if (netif_is_bridge_master(vlan->obj.orig_dev))
1642 return -EOPNOTSUPP;
1643
1644 if (!wops->port_obj_vlan_del)
1645 return -EOPNOTSUPP;
1646 return wops->port_obj_vlan_del(rocker_port, vlan);
1647}
1648
1649static int
1650rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1651 struct switchdev_notifier_fdb_info *info)
1652{
1653 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1654
1655 if (!wops->port_obj_fdb_add)
1656 return -EOPNOTSUPP;
1657
1658 return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1659}
1660
1661static int
1662rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1663 struct switchdev_notifier_fdb_info *info)
1664{
1665 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1666
1667 if (!wops->port_obj_fdb_del)
1668 return -EOPNOTSUPP;
1669 return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1670}
1671
1672static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1673 struct net_device *master,
1674 struct netlink_ext_ack *extack)
1675{
1676 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1677
1678 if (!wops->port_master_linked)
1679 return -EOPNOTSUPP;
1680 return wops->port_master_linked(rocker_port, master, extack);
1681}
1682
1683static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1684 struct net_device *master)
1685{
1686 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1687
1688 if (!wops->port_master_unlinked)
1689 return -EOPNOTSUPP;
1690 return wops->port_master_unlinked(rocker_port, master);
1691}
1692
1693static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1694 struct neighbour *n)
1695{
1696 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1697
1698 if (!wops->port_neigh_update)
1699 return -EOPNOTSUPP;
1700 return wops->port_neigh_update(rocker_port, n);
1701}
1702
1703static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1704 struct neighbour *n)
1705{
1706 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1707
1708 if (!wops->port_neigh_destroy)
1709 return -EOPNOTSUPP;
1710 return wops->port_neigh_destroy(rocker_port, n);
1711}
1712
1713static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1714 const unsigned char *addr,
1715 __be16 vlan_id)
1716{
1717 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1718
1719 if (!wops->port_ev_mac_vlan_seen)
1720 return -EOPNOTSUPP;
1721 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1722}
1723
1724static int rocker_world_fib4_add(struct rocker *rocker,
1725 const struct fib_entry_notifier_info *fen_info)
1726{
1727 struct rocker_world_ops *wops = rocker->wops;
1728
1729 if (!wops->fib4_add)
1730 return 0;
1731 return wops->fib4_add(rocker, fen_info);
1732}
1733
1734static int rocker_world_fib4_del(struct rocker *rocker,
1735 const struct fib_entry_notifier_info *fen_info)
1736{
1737 struct rocker_world_ops *wops = rocker->wops;
1738
1739 if (!wops->fib4_del)
1740 return 0;
1741 return wops->fib4_del(rocker, fen_info);
1742}
1743
1744static void rocker_world_fib4_abort(struct rocker *rocker)
1745{
1746 struct rocker_world_ops *wops = rocker->wops;
1747
1748 if (wops->fib4_abort)
1749 wops->fib4_abort(rocker);
1750}
1751
1752/*****************
1753 * Net device ops
1754 *****************/
1755
1756static int rocker_port_open(struct net_device *dev)
1757{
1758 struct rocker_port *rocker_port = netdev_priv(dev);
1759 int err;
1760
1761 err = rocker_port_dma_rings_init(rocker_port);
1762 if (err)
1763 return err;
1764
1765 err = request_irq(rocker_msix_tx_vector(rocker_port),
1766 rocker_tx_irq_handler, 0,
1767 rocker_driver_name, rocker_port);
1768 if (err) {
1769 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1770 goto err_request_tx_irq;
1771 }
1772
1773 err = request_irq(rocker_msix_rx_vector(rocker_port),
1774 rocker_rx_irq_handler, 0,
1775 rocker_driver_name, rocker_port);
1776 if (err) {
1777 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1778 goto err_request_rx_irq;
1779 }
1780
1781 err = rocker_world_port_open(rocker_port);
1782 if (err) {
1783 netdev_err(rocker_port->dev, "cannot open port in world\n");
1784 goto err_world_port_open;
1785 }
1786
1787 napi_enable(&rocker_port->napi_tx);
1788 napi_enable(&rocker_port->napi_rx);
1789 if (!dev->proto_down)
1790 rocker_port_set_enable(rocker_port, true);
1791 netif_start_queue(dev);
1792 return 0;
1793
1794err_world_port_open:
1795 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1796err_request_rx_irq:
1797 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1798err_request_tx_irq:
1799 rocker_port_dma_rings_fini(rocker_port);
1800 return err;
1801}
1802
1803static int rocker_port_stop(struct net_device *dev)
1804{
1805 struct rocker_port *rocker_port = netdev_priv(dev);
1806
1807 netif_stop_queue(dev);
1808 rocker_port_set_enable(rocker_port, false);
1809 napi_disable(&rocker_port->napi_rx);
1810 napi_disable(&rocker_port->napi_tx);
1811 rocker_world_port_stop(rocker_port);
1812 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1813 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1814 rocker_port_dma_rings_fini(rocker_port);
1815
1816 return 0;
1817}
1818
1819static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1820 const struct rocker_desc_info *desc_info)
1821{
1822 const struct rocker *rocker = rocker_port->rocker;
1823 struct pci_dev *pdev = rocker->pdev;
1824 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1825 struct rocker_tlv *attr;
1826 int rem;
1827
1828 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1829 if (!attrs[ROCKER_TLV_TX_FRAGS])
1830 return;
1831 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1832 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1833 dma_addr_t dma_handle;
1834 size_t len;
1835
1836 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1837 continue;
1838 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1839 attr);
1840 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1841 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1842 continue;
1843 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1844 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1845 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1846 }
1847}
1848
1849static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1850 struct rocker_desc_info *desc_info,
1851 char *buf, size_t buf_len)
1852{
1853 const struct rocker *rocker = rocker_port->rocker;
1854 struct pci_dev *pdev = rocker->pdev;
1855 dma_addr_t dma_handle;
1856 struct rocker_tlv *frag;
1857
1858 dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1859 if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1860 if (net_ratelimit())
1861 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1862 return -EIO;
1863 }
1864 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1865 if (!frag)
1866 goto unmap_frag;
1867 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1868 dma_handle))
1869 goto nest_cancel;
1870 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1871 buf_len))
1872 goto nest_cancel;
1873 rocker_tlv_nest_end(desc_info, frag);
1874 return 0;
1875
1876nest_cancel:
1877 rocker_tlv_nest_cancel(desc_info, frag);
1878unmap_frag:
1879 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1880 return -EMSGSIZE;
1881}
1882
1883static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1884{
1885 struct rocker_port *rocker_port = netdev_priv(dev);
1886 struct rocker *rocker = rocker_port->rocker;
1887 struct rocker_desc_info *desc_info;
1888 struct rocker_tlv *frags;
1889 int i;
1890 int err;
1891
1892 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1893 if (unlikely(!desc_info)) {
1894 if (net_ratelimit())
1895 netdev_err(dev, "tx ring full when queue awake\n");
1896 return NETDEV_TX_BUSY;
1897 }
1898
1899 rocker_desc_cookie_ptr_set(desc_info, skb);
1900
1901 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1902 if (!frags)
1903 goto out;
1904 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1905 skb->data, skb_headlen(skb));
1906 if (err)
1907 goto nest_cancel;
1908 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1909 err = skb_linearize(skb);
1910 if (err)
1911 goto unmap_frags;
1912 }
1913
1914 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1915 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1916
1917 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1918 skb_frag_address(frag),
1919 skb_frag_size(frag));
1920 if (err)
1921 goto unmap_frags;
1922 }
1923 rocker_tlv_nest_end(desc_info, frags);
1924
1925 rocker_desc_gen_clear(desc_info);
1926 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1927
1928 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1929 if (!desc_info)
1930 netif_stop_queue(dev);
1931
1932 return NETDEV_TX_OK;
1933
1934unmap_frags:
1935 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1936nest_cancel:
1937 rocker_tlv_nest_cancel(desc_info, frags);
1938out:
1939 dev_kfree_skb(skb);
1940 dev->stats.tx_dropped++;
1941
1942 return NETDEV_TX_OK;
1943}
1944
1945static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1946{
1947 struct sockaddr *addr = p;
1948 struct rocker_port *rocker_port = netdev_priv(dev);
1949 int err;
1950
1951 if (!is_valid_ether_addr(addr->sa_data))
1952 return -EADDRNOTAVAIL;
1953
1954 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1955 if (err)
1956 return err;
1957 eth_hw_addr_set(dev, addr->sa_data);
1958 return 0;
1959}
1960
1961static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1962{
1963 struct rocker_port *rocker_port = netdev_priv(dev);
1964 int running = netif_running(dev);
1965 int err;
1966
1967 if (running)
1968 rocker_port_stop(dev);
1969
1970 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1971 dev->mtu = new_mtu;
1972
1973 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1974 if (err)
1975 return err;
1976
1977 if (running)
1978 err = rocker_port_open(dev);
1979
1980 return err;
1981}
1982
1983static int rocker_port_get_phys_port_name(struct net_device *dev,
1984 char *buf, size_t len)
1985{
1986 struct rocker_port *rocker_port = netdev_priv(dev);
1987 struct port_name name = { .buf = buf, .len = len };
1988 int err;
1989
1990 err = rocker_cmd_exec(rocker_port, false,
1991 rocker_cmd_get_port_settings_prep, NULL,
1992 rocker_cmd_get_port_settings_phys_name_proc,
1993 &name);
1994
1995 return err ? -EOPNOTSUPP : 0;
1996}
1997
1998static void rocker_port_neigh_destroy(struct net_device *dev,
1999 struct neighbour *n)
2000{
2001 struct rocker_port *rocker_port = netdev_priv(n->dev);
2002 int err;
2003
2004 err = rocker_world_port_neigh_destroy(rocker_port, n);
2005 if (err)
2006 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2007 err);
2008}
2009
2010static int rocker_port_get_port_parent_id(struct net_device *dev,
2011 struct netdev_phys_item_id *ppid)
2012{
2013 const struct rocker_port *rocker_port = netdev_priv(dev);
2014 const struct rocker *rocker = rocker_port->rocker;
2015
2016 ppid->id_len = sizeof(rocker->hw.id);
2017 memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2018
2019 return 0;
2020}
2021
2022static const struct net_device_ops rocker_port_netdev_ops = {
2023 .ndo_open = rocker_port_open,
2024 .ndo_stop = rocker_port_stop,
2025 .ndo_start_xmit = rocker_port_xmit,
2026 .ndo_set_mac_address = rocker_port_set_mac_address,
2027 .ndo_change_mtu = rocker_port_change_mtu,
2028 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2029 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2030 .ndo_get_port_parent_id = rocker_port_get_port_parent_id,
2031};
2032
2033/********************
2034 * swdev interface
2035 ********************/
2036
2037static int rocker_port_attr_set(struct net_device *dev,
2038 const struct switchdev_attr *attr)
2039{
2040 struct rocker_port *rocker_port = netdev_priv(dev);
2041 int err = 0;
2042
2043 switch (attr->id) {
2044 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2045 err = rocker_world_port_attr_stp_state_set(rocker_port,
2046 attr->u.stp_state);
2047 break;
2048 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2049 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2050 attr->u.brport_flags);
2051 break;
2052 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2053 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2054 attr->u.brport_flags);
2055 break;
2056 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2057 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2058 attr->u.ageing_time);
2059 break;
2060 default:
2061 err = -EOPNOTSUPP;
2062 break;
2063 }
2064
2065 return err;
2066}
2067
2068static int rocker_port_obj_add(struct net_device *dev,
2069 const struct switchdev_obj *obj)
2070{
2071 struct rocker_port *rocker_port = netdev_priv(dev);
2072 int err = 0;
2073
2074 switch (obj->id) {
2075 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2076 err = rocker_world_port_obj_vlan_add(rocker_port,
2077 SWITCHDEV_OBJ_PORT_VLAN(obj));
2078 break;
2079 default:
2080 err = -EOPNOTSUPP;
2081 break;
2082 }
2083
2084 return err;
2085}
2086
2087static int rocker_port_obj_del(struct net_device *dev,
2088 const struct switchdev_obj *obj)
2089{
2090 struct rocker_port *rocker_port = netdev_priv(dev);
2091 int err = 0;
2092
2093 switch (obj->id) {
2094 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2095 err = rocker_world_port_obj_vlan_del(rocker_port,
2096 SWITCHDEV_OBJ_PORT_VLAN(obj));
2097 break;
2098 default:
2099 err = -EOPNOTSUPP;
2100 break;
2101 }
2102
2103 return err;
2104}
2105
2106struct rocker_fib_event_work {
2107 struct work_struct work;
2108 union {
2109 struct fib_entry_notifier_info fen_info;
2110 struct fib_rule_notifier_info fr_info;
2111 };
2112 struct rocker *rocker;
2113 unsigned long event;
2114};
2115
2116static void rocker_router_fib_event_work(struct work_struct *work)
2117{
2118 struct rocker_fib_event_work *fib_work =
2119 container_of(work, struct rocker_fib_event_work, work);
2120 struct rocker *rocker = fib_work->rocker;
2121 struct fib_rule *rule;
2122 int err;
2123
2124 /* Protect internal structures from changes */
2125 rtnl_lock();
2126 switch (fib_work->event) {
2127 case FIB_EVENT_ENTRY_REPLACE:
2128 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2129 if (err)
2130 rocker_world_fib4_abort(rocker);
2131 fib_info_put(fib_work->fen_info.fi);
2132 break;
2133 case FIB_EVENT_ENTRY_DEL:
2134 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2135 fib_info_put(fib_work->fen_info.fi);
2136 break;
2137 case FIB_EVENT_RULE_ADD:
2138 case FIB_EVENT_RULE_DEL:
2139 rule = fib_work->fr_info.rule;
2140 if (!fib4_rule_default(rule))
2141 rocker_world_fib4_abort(rocker);
2142 fib_rule_put(rule);
2143 break;
2144 }
2145 rtnl_unlock();
2146 kfree(fib_work);
2147}
2148
2149/* Called with rcu_read_lock() */
2150static int rocker_router_fib_event(struct notifier_block *nb,
2151 unsigned long event, void *ptr)
2152{
2153 struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2154 struct rocker_fib_event_work *fib_work;
2155 struct fib_notifier_info *info = ptr;
2156
2157 if (info->family != AF_INET)
2158 return NOTIFY_DONE;
2159
2160 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2161 if (WARN_ON(!fib_work))
2162 return NOTIFY_BAD;
2163
2164 INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2165 fib_work->rocker = rocker;
2166 fib_work->event = event;
2167
2168 switch (event) {
2169 case FIB_EVENT_ENTRY_REPLACE:
2170 case FIB_EVENT_ENTRY_DEL:
2171 if (info->family == AF_INET) {
2172 struct fib_entry_notifier_info *fen_info = ptr;
2173
2174 if (fen_info->fi->fib_nh_is_v6) {
2175 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2176 kfree(fib_work);
2177 return notifier_from_errno(-EINVAL);
2178 }
2179 if (fen_info->fi->nh) {
2180 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2181 kfree(fib_work);
2182 return notifier_from_errno(-EINVAL);
2183 }
2184 }
2185
2186 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2187 /* Take referece on fib_info to prevent it from being
2188 * freed while work is queued. Release it afterwards.
2189 */
2190 fib_info_hold(fib_work->fen_info.fi);
2191 break;
2192 case FIB_EVENT_RULE_ADD:
2193 case FIB_EVENT_RULE_DEL:
2194 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2195 fib_rule_get(fib_work->fr_info.rule);
2196 break;
2197 }
2198
2199 queue_work(rocker->rocker_owq, &fib_work->work);
2200
2201 return NOTIFY_DONE;
2202}
2203
2204/********************
2205 * ethtool interface
2206 ********************/
2207
2208static int
2209rocker_port_get_link_ksettings(struct net_device *dev,
2210 struct ethtool_link_ksettings *ecmd)
2211{
2212 struct rocker_port *rocker_port = netdev_priv(dev);
2213
2214 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2215}
2216
2217static int
2218rocker_port_set_link_ksettings(struct net_device *dev,
2219 const struct ethtool_link_ksettings *ecmd)
2220{
2221 struct rocker_port *rocker_port = netdev_priv(dev);
2222
2223 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2224}
2225
2226static void rocker_port_get_drvinfo(struct net_device *dev,
2227 struct ethtool_drvinfo *drvinfo)
2228{
2229 strscpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2230 strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2231}
2232
2233static struct rocker_port_stats {
2234 char str[ETH_GSTRING_LEN];
2235 int type;
2236} rocker_port_stats[] = {
2237 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2238 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2239 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2240 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2241
2242 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2243 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2244 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2245 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2246};
2247
2248#define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2249
2250static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2251 u8 *data)
2252{
2253 u8 *p = data;
2254 int i;
2255
2256 switch (stringset) {
2257 case ETH_SS_STATS:
2258 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2259 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2260 p += ETH_GSTRING_LEN;
2261 }
2262 break;
2263 }
2264}
2265
2266static int
2267rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2268 struct rocker_desc_info *desc_info,
2269 void *priv)
2270{
2271 struct rocker_tlv *cmd_stats;
2272
2273 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2274 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2275 return -EMSGSIZE;
2276
2277 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2278 if (!cmd_stats)
2279 return -EMSGSIZE;
2280
2281 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2282 rocker_port->pport))
2283 return -EMSGSIZE;
2284
2285 rocker_tlv_nest_end(desc_info, cmd_stats);
2286
2287 return 0;
2288}
2289
2290static int
2291rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2292 const struct rocker_desc_info *desc_info,
2293 void *priv)
2294{
2295 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2296 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2297 const struct rocker_tlv *pattr;
2298 u32 pport;
2299 u64 *data = priv;
2300 int i;
2301
2302 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2303
2304 if (!attrs[ROCKER_TLV_CMD_INFO])
2305 return -EIO;
2306
2307 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2308 attrs[ROCKER_TLV_CMD_INFO]);
2309
2310 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2311 return -EIO;
2312
2313 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2314 if (pport != rocker_port->pport)
2315 return -EIO;
2316
2317 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2318 pattr = stats_attrs[rocker_port_stats[i].type];
2319 if (!pattr)
2320 continue;
2321
2322 data[i] = rocker_tlv_get_u64(pattr);
2323 }
2324
2325 return 0;
2326}
2327
2328static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2329 void *priv)
2330{
2331 return rocker_cmd_exec(rocker_port, false,
2332 rocker_cmd_get_port_stats_prep, NULL,
2333 rocker_cmd_get_port_stats_ethtool_proc,
2334 priv);
2335}
2336
2337static void rocker_port_get_stats(struct net_device *dev,
2338 struct ethtool_stats *stats, u64 *data)
2339{
2340 struct rocker_port *rocker_port = netdev_priv(dev);
2341
2342 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2343 int i;
2344
2345 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2346 data[i] = 0;
2347 }
2348}
2349
2350static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2351{
2352 switch (sset) {
2353 case ETH_SS_STATS:
2354 return ROCKER_PORT_STATS_LEN;
2355 default:
2356 return -EOPNOTSUPP;
2357 }
2358}
2359
2360static const struct ethtool_ops rocker_port_ethtool_ops = {
2361 .get_drvinfo = rocker_port_get_drvinfo,
2362 .get_link = ethtool_op_get_link,
2363 .get_strings = rocker_port_get_strings,
2364 .get_ethtool_stats = rocker_port_get_stats,
2365 .get_sset_count = rocker_port_get_sset_count,
2366 .get_link_ksettings = rocker_port_get_link_ksettings,
2367 .set_link_ksettings = rocker_port_set_link_ksettings,
2368};
2369
2370/*****************
2371 * NAPI interface
2372 *****************/
2373
2374static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2375{
2376 return container_of(napi, struct rocker_port, napi_tx);
2377}
2378
2379static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2380{
2381 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2382 const struct rocker *rocker = rocker_port->rocker;
2383 const struct rocker_desc_info *desc_info;
2384 u32 credits = 0;
2385 int err;
2386
2387 /* Cleanup tx descriptors */
2388 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2389 struct sk_buff *skb;
2390
2391 err = rocker_desc_err(desc_info);
2392 if (err && net_ratelimit())
2393 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2394 err);
2395 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2396
2397 skb = rocker_desc_cookie_ptr_get(desc_info);
2398 if (err == 0) {
2399 rocker_port->dev->stats.tx_packets++;
2400 rocker_port->dev->stats.tx_bytes += skb->len;
2401 } else {
2402 rocker_port->dev->stats.tx_errors++;
2403 }
2404
2405 dev_kfree_skb_any(skb);
2406 credits++;
2407 }
2408
2409 if (credits && netif_queue_stopped(rocker_port->dev))
2410 netif_wake_queue(rocker_port->dev);
2411
2412 napi_complete(napi);
2413 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2414
2415 return 0;
2416}
2417
2418static int rocker_port_rx_proc(const struct rocker *rocker,
2419 const struct rocker_port *rocker_port,
2420 struct rocker_desc_info *desc_info)
2421{
2422 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2423 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2424 size_t rx_len;
2425 u16 rx_flags = 0;
2426
2427 if (!skb)
2428 return -ENOENT;
2429
2430 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2431 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2432 return -EINVAL;
2433 if (attrs[ROCKER_TLV_RX_FLAGS])
2434 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2435
2436 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2437
2438 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2439 skb_put(skb, rx_len);
2440 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2441
2442 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2443 skb->offload_fwd_mark = 1;
2444
2445 rocker_port->dev->stats.rx_packets++;
2446 rocker_port->dev->stats.rx_bytes += skb->len;
2447
2448 netif_receive_skb(skb);
2449
2450 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2451}
2452
2453static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2454{
2455 return container_of(napi, struct rocker_port, napi_rx);
2456}
2457
2458static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2459{
2460 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2461 const struct rocker *rocker = rocker_port->rocker;
2462 struct rocker_desc_info *desc_info;
2463 u32 credits = 0;
2464 int err;
2465
2466 /* Process rx descriptors */
2467 while (credits < budget &&
2468 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2469 err = rocker_desc_err(desc_info);
2470 if (err) {
2471 if (net_ratelimit())
2472 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2473 err);
2474 } else {
2475 err = rocker_port_rx_proc(rocker, rocker_port,
2476 desc_info);
2477 if (err && net_ratelimit())
2478 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2479 err);
2480 }
2481 if (err)
2482 rocker_port->dev->stats.rx_errors++;
2483
2484 rocker_desc_gen_clear(desc_info);
2485 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2486 credits++;
2487 }
2488
2489 if (credits < budget)
2490 napi_complete_done(napi, credits);
2491
2492 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2493
2494 return credits;
2495}
2496
2497/*****************
2498 * PCI driver ops
2499 *****************/
2500
2501static void rocker_carrier_init(const struct rocker_port *rocker_port)
2502{
2503 const struct rocker *rocker = rocker_port->rocker;
2504 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2505 bool link_up;
2506
2507 link_up = link_status & (1 << rocker_port->pport);
2508 if (link_up)
2509 netif_carrier_on(rocker_port->dev);
2510 else
2511 netif_carrier_off(rocker_port->dev);
2512}
2513
2514static void rocker_remove_ports(struct rocker *rocker)
2515{
2516 struct rocker_port *rocker_port;
2517 int i;
2518
2519 for (i = 0; i < rocker->port_count; i++) {
2520 rocker_port = rocker->ports[i];
2521 if (!rocker_port)
2522 continue;
2523 rocker_world_port_fini(rocker_port);
2524 unregister_netdev(rocker_port->dev);
2525 rocker_world_port_post_fini(rocker_port);
2526 free_netdev(rocker_port->dev);
2527 }
2528 rocker_world_fini(rocker);
2529 kfree(rocker->ports);
2530}
2531
2532static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2533{
2534 const struct rocker *rocker = rocker_port->rocker;
2535 const struct pci_dev *pdev = rocker->pdev;
2536 u8 addr[ETH_ALEN];
2537 int err;
2538
2539 err = rocker_cmd_get_port_settings_macaddr(rocker_port, addr);
2540 if (!err) {
2541 eth_hw_addr_set(rocker_port->dev, addr);
2542 } else {
2543 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2544 eth_hw_addr_random(rocker_port->dev);
2545 }
2546}
2547
2548#define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2549#define ROCKER_PORT_MAX_MTU 9000
2550static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2551{
2552 struct pci_dev *pdev = rocker->pdev;
2553 struct rocker_port *rocker_port;
2554 struct net_device *dev;
2555 int err;
2556
2557 dev = alloc_etherdev(sizeof(struct rocker_port));
2558 if (!dev)
2559 return -ENOMEM;
2560 SET_NETDEV_DEV(dev, &pdev->dev);
2561 rocker_port = netdev_priv(dev);
2562 rocker_port->dev = dev;
2563 rocker_port->rocker = rocker;
2564 rocker_port->port_number = port_number;
2565 rocker_port->pport = port_number + 1;
2566
2567 err = rocker_world_check_init(rocker_port);
2568 if (err) {
2569 dev_err(&pdev->dev, "world init failed\n");
2570 goto err_world_check_init;
2571 }
2572
2573 rocker_port_dev_addr_init(rocker_port);
2574 dev->netdev_ops = &rocker_port_netdev_ops;
2575 dev->ethtool_ops = &rocker_port_ethtool_ops;
2576 netif_napi_add_tx(dev, &rocker_port->napi_tx, rocker_port_poll_tx);
2577 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx);
2578 rocker_carrier_init(rocker_port);
2579
2580 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2581
2582 /* MTU range: 68 - 9000 */
2583 dev->min_mtu = ROCKER_PORT_MIN_MTU;
2584 dev->max_mtu = ROCKER_PORT_MAX_MTU;
2585
2586 err = rocker_world_port_pre_init(rocker_port);
2587 if (err) {
2588 dev_err(&pdev->dev, "port world pre-init failed\n");
2589 goto err_world_port_pre_init;
2590 }
2591 err = register_netdev(dev);
2592 if (err) {
2593 dev_err(&pdev->dev, "register_netdev failed\n");
2594 goto err_register_netdev;
2595 }
2596 rocker->ports[port_number] = rocker_port;
2597
2598 err = rocker_world_port_init(rocker_port);
2599 if (err) {
2600 dev_err(&pdev->dev, "port world init failed\n");
2601 goto err_world_port_init;
2602 }
2603
2604 return 0;
2605
2606err_world_port_init:
2607 rocker->ports[port_number] = NULL;
2608 unregister_netdev(dev);
2609err_register_netdev:
2610 rocker_world_port_post_fini(rocker_port);
2611err_world_port_pre_init:
2612err_world_check_init:
2613 free_netdev(dev);
2614 return err;
2615}
2616
2617static int rocker_probe_ports(struct rocker *rocker)
2618{
2619 int i;
2620 size_t alloc_size;
2621 int err;
2622
2623 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2624 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2625 if (!rocker->ports)
2626 return -ENOMEM;
2627 for (i = 0; i < rocker->port_count; i++) {
2628 err = rocker_probe_port(rocker, i);
2629 if (err)
2630 goto remove_ports;
2631 }
2632 return 0;
2633
2634remove_ports:
2635 rocker_remove_ports(rocker);
2636 return err;
2637}
2638
2639static int rocker_msix_init(struct rocker *rocker)
2640{
2641 struct pci_dev *pdev = rocker->pdev;
2642 int msix_entries;
2643 int i;
2644 int err;
2645
2646 msix_entries = pci_msix_vec_count(pdev);
2647 if (msix_entries < 0)
2648 return msix_entries;
2649
2650 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2651 return -EINVAL;
2652
2653 rocker->msix_entries = kmalloc_array(msix_entries,
2654 sizeof(struct msix_entry),
2655 GFP_KERNEL);
2656 if (!rocker->msix_entries)
2657 return -ENOMEM;
2658
2659 for (i = 0; i < msix_entries; i++)
2660 rocker->msix_entries[i].entry = i;
2661
2662 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2663 if (err < 0)
2664 goto err_enable_msix;
2665
2666 return 0;
2667
2668err_enable_msix:
2669 kfree(rocker->msix_entries);
2670 return err;
2671}
2672
2673static void rocker_msix_fini(const struct rocker *rocker)
2674{
2675 pci_disable_msix(rocker->pdev);
2676 kfree(rocker->msix_entries);
2677}
2678
2679static bool rocker_port_dev_check(const struct net_device *dev)
2680{
2681 return dev->netdev_ops == &rocker_port_netdev_ops;
2682}
2683
2684static int
2685rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2686 struct switchdev_notifier_port_attr_info *port_attr_info)
2687{
2688 int err;
2689
2690 err = rocker_port_attr_set(netdev, port_attr_info->attr);
2691
2692 port_attr_info->handled = true;
2693 return notifier_from_errno(err);
2694}
2695
2696struct rocker_switchdev_event_work {
2697 struct work_struct work;
2698 struct switchdev_notifier_fdb_info fdb_info;
2699 struct rocker_port *rocker_port;
2700 unsigned long event;
2701};
2702
2703static void
2704rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2705 struct switchdev_notifier_fdb_info *recv_info)
2706{
2707 struct switchdev_notifier_fdb_info info = {};
2708
2709 info.addr = recv_info->addr;
2710 info.vid = recv_info->vid;
2711 info.offloaded = true;
2712 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2713 rocker_port->dev, &info.info, NULL);
2714}
2715
2716static void rocker_switchdev_event_work(struct work_struct *work)
2717{
2718 struct rocker_switchdev_event_work *switchdev_work =
2719 container_of(work, struct rocker_switchdev_event_work, work);
2720 struct rocker_port *rocker_port = switchdev_work->rocker_port;
2721 struct switchdev_notifier_fdb_info *fdb_info;
2722 int err;
2723
2724 rtnl_lock();
2725 switch (switchdev_work->event) {
2726 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2727 fdb_info = &switchdev_work->fdb_info;
2728 if (!fdb_info->added_by_user || fdb_info->is_local)
2729 break;
2730 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2731 if (err) {
2732 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2733 break;
2734 }
2735 rocker_fdb_offload_notify(rocker_port, fdb_info);
2736 break;
2737 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2738 fdb_info = &switchdev_work->fdb_info;
2739 if (!fdb_info->added_by_user || fdb_info->is_local)
2740 break;
2741 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2742 if (err)
2743 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744 break;
2745 }
2746 rtnl_unlock();
2747
2748 kfree(switchdev_work->fdb_info.addr);
2749 kfree(switchdev_work);
2750 dev_put(rocker_port->dev);
2751}
2752
2753/* called under rcu_read_lock() */
2754static int rocker_switchdev_event(struct notifier_block *unused,
2755 unsigned long event, void *ptr)
2756{
2757 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2758 struct rocker_switchdev_event_work *switchdev_work;
2759 struct switchdev_notifier_fdb_info *fdb_info = ptr;
2760 struct rocker_port *rocker_port;
2761
2762 if (!rocker_port_dev_check(dev))
2763 return NOTIFY_DONE;
2764
2765 if (event == SWITCHDEV_PORT_ATTR_SET)
2766 return rocker_switchdev_port_attr_set_event(dev, ptr);
2767
2768 rocker_port = netdev_priv(dev);
2769 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2770 if (WARN_ON(!switchdev_work))
2771 return NOTIFY_BAD;
2772
2773 INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2774 switchdev_work->rocker_port = rocker_port;
2775 switchdev_work->event = event;
2776
2777 switch (event) {
2778 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2779 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2780 memcpy(&switchdev_work->fdb_info, ptr,
2781 sizeof(switchdev_work->fdb_info));
2782 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2783 if (unlikely(!switchdev_work->fdb_info.addr)) {
2784 kfree(switchdev_work);
2785 return NOTIFY_BAD;
2786 }
2787
2788 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2789 fdb_info->addr);
2790 /* Take a reference on the rocker device */
2791 dev_hold(dev);
2792 break;
2793 default:
2794 kfree(switchdev_work);
2795 return NOTIFY_DONE;
2796 }
2797
2798 queue_work(rocker_port->rocker->rocker_owq,
2799 &switchdev_work->work);
2800 return NOTIFY_DONE;
2801}
2802
2803static int
2804rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2805 struct switchdev_notifier_port_obj_info *port_obj_info)
2806{
2807 int err = -EOPNOTSUPP;
2808
2809 switch (event) {
2810 case SWITCHDEV_PORT_OBJ_ADD:
2811 err = rocker_port_obj_add(netdev, port_obj_info->obj);
2812 break;
2813 case SWITCHDEV_PORT_OBJ_DEL:
2814 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2815 break;
2816 }
2817
2818 port_obj_info->handled = true;
2819 return notifier_from_errno(err);
2820}
2821
2822static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2823 unsigned long event, void *ptr)
2824{
2825 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2826
2827 if (!rocker_port_dev_check(dev))
2828 return NOTIFY_DONE;
2829
2830 switch (event) {
2831 case SWITCHDEV_PORT_OBJ_ADD:
2832 case SWITCHDEV_PORT_OBJ_DEL:
2833 return rocker_switchdev_port_obj_event(event, dev, ptr);
2834 case SWITCHDEV_PORT_ATTR_SET:
2835 return rocker_switchdev_port_attr_set_event(dev, ptr);
2836 }
2837
2838 return NOTIFY_DONE;
2839}
2840
2841static struct notifier_block rocker_switchdev_notifier = {
2842 .notifier_call = rocker_switchdev_event,
2843};
2844
2845static struct notifier_block rocker_switchdev_blocking_notifier = {
2846 .notifier_call = rocker_switchdev_blocking_event,
2847};
2848
2849static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2850{
2851 struct notifier_block *nb;
2852 struct rocker *rocker;
2853 int err;
2854
2855 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2856 if (!rocker)
2857 return -ENOMEM;
2858
2859 err = pci_enable_device(pdev);
2860 if (err) {
2861 dev_err(&pdev->dev, "pci_enable_device failed\n");
2862 goto err_pci_enable_device;
2863 }
2864
2865 err = pci_request_regions(pdev, rocker_driver_name);
2866 if (err) {
2867 dev_err(&pdev->dev, "pci_request_regions failed\n");
2868 goto err_pci_request_regions;
2869 }
2870
2871 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2872 if (err) {
2873 dev_err(&pdev->dev, "dma_set_mask failed\n");
2874 goto err_pci_set_dma_mask;
2875 }
2876
2877 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2878 dev_err(&pdev->dev, "invalid PCI region size\n");
2879 err = -EINVAL;
2880 goto err_pci_resource_len_check;
2881 }
2882
2883 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2884 pci_resource_len(pdev, 0));
2885 if (!rocker->hw_addr) {
2886 dev_err(&pdev->dev, "ioremap failed\n");
2887 err = -EIO;
2888 goto err_ioremap;
2889 }
2890 pci_set_master(pdev);
2891
2892 rocker->pdev = pdev;
2893 pci_set_drvdata(pdev, rocker);
2894
2895 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2896
2897 err = rocker_msix_init(rocker);
2898 if (err) {
2899 dev_err(&pdev->dev, "MSI-X init failed\n");
2900 goto err_msix_init;
2901 }
2902
2903 err = rocker_basic_hw_test(rocker);
2904 if (err) {
2905 dev_err(&pdev->dev, "basic hw test failed\n");
2906 goto err_basic_hw_test;
2907 }
2908
2909 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2910
2911 err = rocker_dma_rings_init(rocker);
2912 if (err)
2913 goto err_dma_rings_init;
2914
2915 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2916 rocker_cmd_irq_handler, 0,
2917 rocker_driver_name, rocker);
2918 if (err) {
2919 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2920 goto err_request_cmd_irq;
2921 }
2922
2923 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2924 rocker_event_irq_handler, 0,
2925 rocker_driver_name, rocker);
2926 if (err) {
2927 dev_err(&pdev->dev, "cannot assign event irq\n");
2928 goto err_request_event_irq;
2929 }
2930
2931 rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2932 WQ_MEM_RECLAIM);
2933 if (!rocker->rocker_owq) {
2934 err = -ENOMEM;
2935 goto err_alloc_ordered_workqueue;
2936 }
2937
2938 err = rocker_probe_ports(rocker);
2939 if (err) {
2940 dev_err(&pdev->dev, "failed to probe ports\n");
2941 goto err_probe_ports;
2942 }
2943
2944 /* Only FIBs pointing to our own netdevs are programmed into
2945 * the device, so no need to pass a callback.
2946 */
2947 rocker->fib_nb.notifier_call = rocker_router_fib_event;
2948 err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2949 if (err)
2950 goto err_register_fib_notifier;
2951
2952 err = register_switchdev_notifier(&rocker_switchdev_notifier);
2953 if (err) {
2954 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2955 goto err_register_switchdev_notifier;
2956 }
2957
2958 nb = &rocker_switchdev_blocking_notifier;
2959 err = register_switchdev_blocking_notifier(nb);
2960 if (err) {
2961 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2962 goto err_register_switchdev_blocking_notifier;
2963 }
2964
2965 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2966
2967 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2968 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2969
2970 return 0;
2971
2972err_register_switchdev_blocking_notifier:
2973 unregister_switchdev_notifier(&rocker_switchdev_notifier);
2974err_register_switchdev_notifier:
2975 unregister_fib_notifier(&init_net, &rocker->fib_nb);
2976err_register_fib_notifier:
2977 rocker_remove_ports(rocker);
2978err_probe_ports:
2979 destroy_workqueue(rocker->rocker_owq);
2980err_alloc_ordered_workqueue:
2981 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2982err_request_event_irq:
2983 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2984err_request_cmd_irq:
2985 rocker_dma_rings_fini(rocker);
2986err_dma_rings_init:
2987err_basic_hw_test:
2988 rocker_msix_fini(rocker);
2989err_msix_init:
2990 iounmap(rocker->hw_addr);
2991err_ioremap:
2992err_pci_resource_len_check:
2993err_pci_set_dma_mask:
2994 pci_release_regions(pdev);
2995err_pci_request_regions:
2996 pci_disable_device(pdev);
2997err_pci_enable_device:
2998 kfree(rocker);
2999 return err;
3000}
3001
3002static void rocker_remove(struct pci_dev *pdev)
3003{
3004 struct rocker *rocker = pci_get_drvdata(pdev);
3005 struct notifier_block *nb;
3006
3007 nb = &rocker_switchdev_blocking_notifier;
3008 unregister_switchdev_blocking_notifier(nb);
3009
3010 unregister_switchdev_notifier(&rocker_switchdev_notifier);
3011 unregister_fib_notifier(&init_net, &rocker->fib_nb);
3012 rocker_remove_ports(rocker);
3013 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3014 destroy_workqueue(rocker->rocker_owq);
3015 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3016 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3017 rocker_dma_rings_fini(rocker);
3018 rocker_msix_fini(rocker);
3019 iounmap(rocker->hw_addr);
3020 pci_release_regions(rocker->pdev);
3021 pci_disable_device(rocker->pdev);
3022 kfree(rocker);
3023}
3024
3025static struct pci_driver rocker_pci_driver = {
3026 .name = rocker_driver_name,
3027 .id_table = rocker_pci_id_table,
3028 .probe = rocker_probe,
3029 .remove = rocker_remove,
3030};
3031
3032/************************************
3033 * Net device notifier event handler
3034 ************************************/
3035
3036static bool rocker_port_dev_check_under(const struct net_device *dev,
3037 struct rocker *rocker)
3038{
3039 struct rocker_port *rocker_port;
3040
3041 if (!rocker_port_dev_check(dev))
3042 return false;
3043
3044 rocker_port = netdev_priv(dev);
3045 if (rocker_port->rocker != rocker)
3046 return false;
3047
3048 return true;
3049}
3050
3051struct rocker_walk_data {
3052 struct rocker *rocker;
3053 struct rocker_port *port;
3054};
3055
3056static int rocker_lower_dev_walk(struct net_device *lower_dev,
3057 struct netdev_nested_priv *priv)
3058{
3059 struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3060 int ret = 0;
3061
3062 if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3063 data->port = netdev_priv(lower_dev);
3064 ret = 1;
3065 }
3066
3067 return ret;
3068}
3069
3070struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3071 struct rocker *rocker)
3072{
3073 struct netdev_nested_priv priv;
3074 struct rocker_walk_data data;
3075
3076 if (rocker_port_dev_check_under(dev, rocker))
3077 return netdev_priv(dev);
3078
3079 data.rocker = rocker;
3080 data.port = NULL;
3081 priv.data = (void *)&data;
3082 netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3083
3084 return data.port;
3085}
3086
3087static int rocker_netdevice_event(struct notifier_block *unused,
3088 unsigned long event, void *ptr)
3089{
3090 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
3091 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3092 struct netdev_notifier_changeupper_info *info;
3093 struct rocker_port *rocker_port;
3094 int err;
3095
3096 if (!rocker_port_dev_check(dev))
3097 return NOTIFY_DONE;
3098
3099 switch (event) {
3100 case NETDEV_CHANGEUPPER:
3101 info = ptr;
3102 if (!info->master)
3103 goto out;
3104 rocker_port = netdev_priv(dev);
3105 if (info->linking) {
3106 err = rocker_world_port_master_linked(rocker_port,
3107 info->upper_dev,
3108 extack);
3109 if (err)
3110 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3111 err);
3112 } else {
3113 err = rocker_world_port_master_unlinked(rocker_port,
3114 info->upper_dev);
3115 if (err)
3116 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3117 err);
3118 }
3119 }
3120out:
3121 return NOTIFY_DONE;
3122}
3123
3124static struct notifier_block rocker_netdevice_nb __read_mostly = {
3125 .notifier_call = rocker_netdevice_event,
3126};
3127
3128/************************************
3129 * Net event notifier event handler
3130 ************************************/
3131
3132static int rocker_netevent_event(struct notifier_block *unused,
3133 unsigned long event, void *ptr)
3134{
3135 struct rocker_port *rocker_port;
3136 struct net_device *dev;
3137 struct neighbour *n = ptr;
3138 int err;
3139
3140 switch (event) {
3141 case NETEVENT_NEIGH_UPDATE:
3142 if (n->tbl != &arp_tbl)
3143 return NOTIFY_DONE;
3144 dev = n->dev;
3145 if (!rocker_port_dev_check(dev))
3146 return NOTIFY_DONE;
3147 rocker_port = netdev_priv(dev);
3148 err = rocker_world_port_neigh_update(rocker_port, n);
3149 if (err)
3150 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3151 err);
3152 break;
3153 }
3154
3155 return NOTIFY_DONE;
3156}
3157
3158static struct notifier_block rocker_netevent_nb __read_mostly = {
3159 .notifier_call = rocker_netevent_event,
3160};
3161
3162/***********************
3163 * Module init and exit
3164 ***********************/
3165
3166static int __init rocker_module_init(void)
3167{
3168 int err;
3169
3170 register_netdevice_notifier(&rocker_netdevice_nb);
3171 register_netevent_notifier(&rocker_netevent_nb);
3172 err = pci_register_driver(&rocker_pci_driver);
3173 if (err)
3174 goto err_pci_register_driver;
3175 return 0;
3176
3177err_pci_register_driver:
3178 unregister_netevent_notifier(&rocker_netevent_nb);
3179 unregister_netdevice_notifier(&rocker_netdevice_nb);
3180 return err;
3181}
3182
3183static void __exit rocker_module_exit(void)
3184{
3185 unregister_netevent_notifier(&rocker_netevent_nb);
3186 unregister_netdevice_notifier(&rocker_netdevice_nb);
3187 pci_unregister_driver(&rocker_pci_driver);
3188}
3189
3190module_init(rocker_module_init);
3191module_exit(rocker_module_exit);
3192
3193MODULE_LICENSE("GPL v2");
3194MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3195MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3196MODULE_DESCRIPTION("Rocker switch device driver");
3197MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);