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