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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
4 * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/interrupt.h>
12#include <linux/sched.h>
13#include <linux/wait.h>
14#include <linux/spinlock.h>
15#include <linux/sort.h>
16#include <linux/random.h>
17#include <linux/netdevice.h>
18#include <linux/skbuff.h>
19#include <linux/socket.h>
20#include <linux/etherdevice.h>
21#include <linux/ethtool.h>
22#include <linux/if_ether.h>
23#include <linux/if_vlan.h>
24#include <linux/if_bridge.h>
25#include <linux/bitops.h>
26#include <linux/ctype.h>
27#include <linux/workqueue.h>
28#include <net/switchdev.h>
29#include <net/rtnetlink.h>
30#include <net/netevent.h>
31#include <net/arp.h>
32#include <net/fib_rules.h>
33#include <net/fib_notifier.h>
34#include <linux/io-64-nonatomic-lo-hi.h>
35#include <generated/utsrelease.h>
36
37#include "rocker_hw.h"
38#include "rocker.h"
39#include "rocker_tlv.h"
40
41static const char rocker_driver_name[] = "rocker";
42
43static const struct pci_device_id rocker_pci_id_table[] = {
44 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
45 {0, }
46};
47
48struct rocker_wait {
49 wait_queue_head_t wait;
50 bool done;
51 bool nowait;
52};
53
54static void rocker_wait_reset(struct rocker_wait *wait)
55{
56 wait->done = false;
57 wait->nowait = false;
58}
59
60static void rocker_wait_init(struct rocker_wait *wait)
61{
62 init_waitqueue_head(&wait->wait);
63 rocker_wait_reset(wait);
64}
65
66static struct rocker_wait *rocker_wait_create(void)
67{
68 struct rocker_wait *wait;
69
70 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
71 if (!wait)
72 return NULL;
73 return wait;
74}
75
76static void rocker_wait_destroy(struct rocker_wait *wait)
77{
78 kfree(wait);
79}
80
81static bool rocker_wait_event_timeout(struct rocker_wait *wait,
82 unsigned long timeout)
83{
84 wait_event_timeout(wait->wait, wait->done, HZ / 10);
85 if (!wait->done)
86 return false;
87 return true;
88}
89
90static void rocker_wait_wake_up(struct rocker_wait *wait)
91{
92 wait->done = true;
93 wake_up(&wait->wait);
94}
95
96static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
97{
98 return rocker->msix_entries[vector].vector;
99}
100
101static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
102{
103 return rocker_msix_vector(rocker_port->rocker,
104 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
105}
106
107static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
108{
109 return rocker_msix_vector(rocker_port->rocker,
110 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
111}
112
113#define rocker_write32(rocker, reg, val) \
114 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
115#define rocker_read32(rocker, reg) \
116 readl((rocker)->hw_addr + (ROCKER_ ## reg))
117#define rocker_write64(rocker, reg, val) \
118 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119#define rocker_read64(rocker, reg) \
120 readq((rocker)->hw_addr + (ROCKER_ ## reg))
121
122/*****************************
123 * HW basic testing functions
124 *****************************/
125
126static int rocker_reg_test(const struct rocker *rocker)
127{
128 const struct pci_dev *pdev = rocker->pdev;
129 u64 test_reg;
130 u64 rnd;
131
132 rnd = get_random_u32();
133 rnd >>= 1;
134 rocker_write32(rocker, TEST_REG, rnd);
135 test_reg = rocker_read32(rocker, TEST_REG);
136 if (test_reg != rnd * 2) {
137 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
138 test_reg, rnd * 2);
139 return -EIO;
140 }
141
142 rnd = get_random_u32();
143 rnd <<= 31;
144 rnd |= get_random_u32();
145 rocker_write64(rocker, TEST_REG64, rnd);
146 test_reg = rocker_read64(rocker, TEST_REG64);
147 if (test_reg != rnd * 2) {
148 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
149 test_reg, rnd * 2);
150 return -EIO;
151 }
152
153 return 0;
154}
155
156static int rocker_dma_test_one(const struct rocker *rocker,
157 struct rocker_wait *wait, u32 test_type,
158 dma_addr_t dma_handle, const unsigned char *buf,
159 const unsigned char *expect, size_t size)
160{
161 const struct pci_dev *pdev = rocker->pdev;
162 int i;
163
164 rocker_wait_reset(wait);
165 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
166
167 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
168 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
169 return -EIO;
170 }
171
172 for (i = 0; i < size; i++) {
173 if (buf[i] != expect[i]) {
174 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
175 buf[i], i, expect[i]);
176 return -EIO;
177 }
178 }
179 return 0;
180}
181
182#define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
183#define ROCKER_TEST_DMA_FILL_PATTERN 0x96
184
185static int rocker_dma_test_offset(const struct rocker *rocker,
186 struct rocker_wait *wait, int offset)
187{
188 struct pci_dev *pdev = rocker->pdev;
189 unsigned char *alloc;
190 unsigned char *buf;
191 unsigned char *expect;
192 dma_addr_t dma_handle;
193 int i;
194 int err;
195
196 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
197 GFP_KERNEL | GFP_DMA);
198 if (!alloc)
199 return -ENOMEM;
200 buf = alloc + offset;
201 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
202
203 dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
204 DMA_BIDIRECTIONAL);
205 if (dma_mapping_error(&pdev->dev, dma_handle)) {
206 err = -EIO;
207 goto free_alloc;
208 }
209
210 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
211 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
212
213 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
214 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
215 dma_handle, buf, expect,
216 ROCKER_TEST_DMA_BUF_SIZE);
217 if (err)
218 goto unmap;
219
220 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
221 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
222 dma_handle, buf, expect,
223 ROCKER_TEST_DMA_BUF_SIZE);
224 if (err)
225 goto unmap;
226
227 get_random_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
228 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
229 expect[i] = ~buf[i];
230 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
231 dma_handle, buf, expect,
232 ROCKER_TEST_DMA_BUF_SIZE);
233 if (err)
234 goto unmap;
235
236unmap:
237 dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
238 DMA_BIDIRECTIONAL);
239free_alloc:
240 kfree(alloc);
241
242 return err;
243}
244
245static int rocker_dma_test(const struct rocker *rocker,
246 struct rocker_wait *wait)
247{
248 int i;
249 int err;
250
251 for (i = 0; i < 8; i++) {
252 err = rocker_dma_test_offset(rocker, wait, i);
253 if (err)
254 return err;
255 }
256 return 0;
257}
258
259static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
260{
261 struct rocker_wait *wait = dev_id;
262
263 rocker_wait_wake_up(wait);
264
265 return IRQ_HANDLED;
266}
267
268static int rocker_basic_hw_test(const struct rocker *rocker)
269{
270 const struct pci_dev *pdev = rocker->pdev;
271 struct rocker_wait wait;
272 int err;
273
274 err = rocker_reg_test(rocker);
275 if (err) {
276 dev_err(&pdev->dev, "reg test failed\n");
277 return err;
278 }
279
280 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
281 rocker_test_irq_handler, 0,
282 rocker_driver_name, &wait);
283 if (err) {
284 dev_err(&pdev->dev, "cannot assign test irq\n");
285 return err;
286 }
287
288 rocker_wait_init(&wait);
289 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
290
291 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
292 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
293 err = -EIO;
294 goto free_irq;
295 }
296
297 err = rocker_dma_test(rocker, &wait);
298 if (err)
299 dev_err(&pdev->dev, "dma test failed\n");
300
301free_irq:
302 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
303 return err;
304}
305
306/******************************************
307 * DMA rings and descriptors manipulations
308 ******************************************/
309
310static u32 __pos_inc(u32 pos, size_t limit)
311{
312 return ++pos == limit ? 0 : pos;
313}
314
315static int rocker_desc_err(const struct rocker_desc_info *desc_info)
316{
317 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
318
319 switch (err) {
320 case ROCKER_OK:
321 return 0;
322 case -ROCKER_ENOENT:
323 return -ENOENT;
324 case -ROCKER_ENXIO:
325 return -ENXIO;
326 case -ROCKER_ENOMEM:
327 return -ENOMEM;
328 case -ROCKER_EEXIST:
329 return -EEXIST;
330 case -ROCKER_EINVAL:
331 return -EINVAL;
332 case -ROCKER_EMSGSIZE:
333 return -EMSGSIZE;
334 case -ROCKER_ENOTSUP:
335 return -EOPNOTSUPP;
336 case -ROCKER_ENOBUFS:
337 return -ENOBUFS;
338 }
339
340 return -EINVAL;
341}
342
343static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
344{
345 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
346}
347
348static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
349{
350 u32 comp_err = desc_info->desc->comp_err;
351
352 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
353}
354
355static void *
356rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
357{
358 return (void *)(uintptr_t)desc_info->desc->cookie;
359}
360
361static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
362 void *ptr)
363{
364 desc_info->desc->cookie = (uintptr_t) ptr;
365}
366
367static struct rocker_desc_info *
368rocker_desc_head_get(const struct rocker_dma_ring_info *info)
369{
370 struct rocker_desc_info *desc_info;
371 u32 head = __pos_inc(info->head, info->size);
372
373 desc_info = &info->desc_info[info->head];
374 if (head == info->tail)
375 return NULL; /* ring full */
376 desc_info->tlv_size = 0;
377 return desc_info;
378}
379
380static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
381{
382 desc_info->desc->buf_size = desc_info->data_size;
383 desc_info->desc->tlv_size = desc_info->tlv_size;
384}
385
386static void rocker_desc_head_set(const struct rocker *rocker,
387 struct rocker_dma_ring_info *info,
388 const struct rocker_desc_info *desc_info)
389{
390 u32 head = __pos_inc(info->head, info->size);
391
392 BUG_ON(head == info->tail);
393 rocker_desc_commit(desc_info);
394 info->head = head;
395 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
396}
397
398static struct rocker_desc_info *
399rocker_desc_tail_get(struct rocker_dma_ring_info *info)
400{
401 struct rocker_desc_info *desc_info;
402
403 if (info->tail == info->head)
404 return NULL; /* nothing to be done between head and tail */
405 desc_info = &info->desc_info[info->tail];
406 if (!rocker_desc_gen(desc_info))
407 return NULL; /* gen bit not set, desc is not ready yet */
408 info->tail = __pos_inc(info->tail, info->size);
409 desc_info->tlv_size = desc_info->desc->tlv_size;
410 return desc_info;
411}
412
413static void rocker_dma_ring_credits_set(const struct rocker *rocker,
414 const struct rocker_dma_ring_info *info,
415 u32 credits)
416{
417 if (credits)
418 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
419}
420
421static unsigned long rocker_dma_ring_size_fix(size_t size)
422{
423 return max(ROCKER_DMA_SIZE_MIN,
424 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
425}
426
427static int rocker_dma_ring_create(const struct rocker *rocker,
428 unsigned int type,
429 size_t size,
430 struct rocker_dma_ring_info *info)
431{
432 int i;
433
434 BUG_ON(size != rocker_dma_ring_size_fix(size));
435 info->size = size;
436 info->type = type;
437 info->head = 0;
438 info->tail = 0;
439 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
440 GFP_KERNEL);
441 if (!info->desc_info)
442 return -ENOMEM;
443
444 info->desc = dma_alloc_coherent(&rocker->pdev->dev,
445 info->size * sizeof(*info->desc),
446 &info->mapaddr, GFP_KERNEL);
447 if (!info->desc) {
448 kfree(info->desc_info);
449 return -ENOMEM;
450 }
451
452 for (i = 0; i < info->size; i++)
453 info->desc_info[i].desc = &info->desc[i];
454
455 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
456 ROCKER_DMA_DESC_CTRL_RESET);
457 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
458 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
459
460 return 0;
461}
462
463static void rocker_dma_ring_destroy(const struct rocker *rocker,
464 const struct rocker_dma_ring_info *info)
465{
466 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
467
468 dma_free_coherent(&rocker->pdev->dev,
469 info->size * sizeof(struct rocker_desc), info->desc,
470 info->mapaddr);
471 kfree(info->desc_info);
472}
473
474static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
475 struct rocker_dma_ring_info *info)
476{
477 int i;
478
479 BUG_ON(info->head || info->tail);
480
481 /* When ring is consumer, we need to advance head for each desc.
482 * That tells hw that the desc is ready to be used by it.
483 */
484 for (i = 0; i < info->size - 1; i++)
485 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
486 rocker_desc_commit(&info->desc_info[i]);
487}
488
489static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
490 const struct rocker_dma_ring_info *info,
491 int direction, size_t buf_size)
492{
493 struct pci_dev *pdev = rocker->pdev;
494 int i;
495 int err;
496
497 for (i = 0; i < info->size; i++) {
498 struct rocker_desc_info *desc_info = &info->desc_info[i];
499 struct rocker_desc *desc = &info->desc[i];
500 dma_addr_t dma_handle;
501 char *buf;
502
503 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
504 if (!buf) {
505 err = -ENOMEM;
506 goto rollback;
507 }
508
509 dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
510 direction);
511 if (dma_mapping_error(&pdev->dev, dma_handle)) {
512 kfree(buf);
513 err = -EIO;
514 goto rollback;
515 }
516
517 desc_info->data = buf;
518 desc_info->data_size = buf_size;
519 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
520
521 desc->buf_addr = dma_handle;
522 desc->buf_size = buf_size;
523 }
524 return 0;
525
526rollback:
527 for (i--; i >= 0; i--) {
528 const struct rocker_desc_info *desc_info = &info->desc_info[i];
529
530 dma_unmap_single(&pdev->dev,
531 dma_unmap_addr(desc_info, mapaddr),
532 desc_info->data_size, direction);
533 kfree(desc_info->data);
534 }
535 return err;
536}
537
538static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
539 const struct rocker_dma_ring_info *info,
540 int direction)
541{
542 struct pci_dev *pdev = rocker->pdev;
543 int i;
544
545 for (i = 0; i < info->size; i++) {
546 const struct rocker_desc_info *desc_info = &info->desc_info[i];
547 struct rocker_desc *desc = &info->desc[i];
548
549 desc->buf_addr = 0;
550 desc->buf_size = 0;
551 dma_unmap_single(&pdev->dev,
552 dma_unmap_addr(desc_info, mapaddr),
553 desc_info->data_size, direction);
554 kfree(desc_info->data);
555 }
556}
557
558static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
559{
560 struct rocker_wait *wait;
561
562 wait = rocker_wait_create();
563 if (!wait)
564 return -ENOMEM;
565 rocker_desc_cookie_ptr_set(desc_info, wait);
566 return 0;
567}
568
569static void
570rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
571{
572 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
573
574 rocker_wait_destroy(wait);
575}
576
577static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
578{
579 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
580 int i;
581 int err;
582
583 for (i = 0; i < cmd_ring->size; i++) {
584 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
585 if (err)
586 goto rollback;
587 }
588 return 0;
589
590rollback:
591 for (i--; i >= 0; i--)
592 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
593 return err;
594}
595
596static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
597{
598 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
599 int i;
600
601 for (i = 0; i < cmd_ring->size; i++)
602 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
603}
604
605static int rocker_dma_rings_init(struct rocker *rocker)
606{
607 const struct pci_dev *pdev = rocker->pdev;
608 int err;
609
610 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
611 ROCKER_DMA_CMD_DEFAULT_SIZE,
612 &rocker->cmd_ring);
613 if (err) {
614 dev_err(&pdev->dev, "failed to create command dma ring\n");
615 return err;
616 }
617
618 spin_lock_init(&rocker->cmd_ring_lock);
619
620 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
621 DMA_BIDIRECTIONAL, PAGE_SIZE);
622 if (err) {
623 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
624 goto err_dma_cmd_ring_bufs_alloc;
625 }
626
627 err = rocker_dma_cmd_ring_waits_alloc(rocker);
628 if (err) {
629 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
630 goto err_dma_cmd_ring_waits_alloc;
631 }
632
633 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
634 ROCKER_DMA_EVENT_DEFAULT_SIZE,
635 &rocker->event_ring);
636 if (err) {
637 dev_err(&pdev->dev, "failed to create event dma ring\n");
638 goto err_dma_event_ring_create;
639 }
640
641 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
642 DMA_FROM_DEVICE, PAGE_SIZE);
643 if (err) {
644 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
645 goto err_dma_event_ring_bufs_alloc;
646 }
647 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
648 return 0;
649
650err_dma_event_ring_bufs_alloc:
651 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
652err_dma_event_ring_create:
653 rocker_dma_cmd_ring_waits_free(rocker);
654err_dma_cmd_ring_waits_alloc:
655 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
656 DMA_BIDIRECTIONAL);
657err_dma_cmd_ring_bufs_alloc:
658 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
659 return err;
660}
661
662static void rocker_dma_rings_fini(struct rocker *rocker)
663{
664 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
665 DMA_BIDIRECTIONAL);
666 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
667 rocker_dma_cmd_ring_waits_free(rocker);
668 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
669 DMA_BIDIRECTIONAL);
670 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
671}
672
673static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
674 struct rocker_desc_info *desc_info,
675 struct sk_buff *skb, size_t buf_len)
676{
677 const struct rocker *rocker = rocker_port->rocker;
678 struct pci_dev *pdev = rocker->pdev;
679 dma_addr_t dma_handle;
680
681 dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
682 DMA_FROM_DEVICE);
683 if (dma_mapping_error(&pdev->dev, dma_handle))
684 return -EIO;
685 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
686 goto tlv_put_failure;
687 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
688 goto tlv_put_failure;
689 return 0;
690
691tlv_put_failure:
692 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
693 desc_info->tlv_size = 0;
694 return -EMSGSIZE;
695}
696
697static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
698{
699 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
700}
701
702static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
703 struct rocker_desc_info *desc_info)
704{
705 struct net_device *dev = rocker_port->dev;
706 struct sk_buff *skb;
707 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
708 int err;
709
710 /* Ensure that hw will see tlv_size zero in case of an error.
711 * That tells hw to use another descriptor.
712 */
713 rocker_desc_cookie_ptr_set(desc_info, NULL);
714 desc_info->tlv_size = 0;
715
716 skb = netdev_alloc_skb_ip_align(dev, buf_len);
717 if (!skb)
718 return -ENOMEM;
719 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
720 if (err) {
721 dev_kfree_skb_any(skb);
722 return err;
723 }
724 rocker_desc_cookie_ptr_set(desc_info, skb);
725 return 0;
726}
727
728static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
729 const struct rocker_tlv **attrs)
730{
731 struct pci_dev *pdev = rocker->pdev;
732 dma_addr_t dma_handle;
733 size_t len;
734
735 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
736 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
737 return;
738 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
739 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
740 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
741}
742
743static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
744 const struct rocker_desc_info *desc_info)
745{
746 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
747 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
748
749 if (!skb)
750 return;
751 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
752 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
753 dev_kfree_skb_any(skb);
754}
755
756static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
757{
758 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
759 const struct rocker *rocker = rocker_port->rocker;
760 int i;
761 int err;
762
763 for (i = 0; i < rx_ring->size; i++) {
764 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
765 &rx_ring->desc_info[i]);
766 if (err)
767 goto rollback;
768 }
769 return 0;
770
771rollback:
772 for (i--; i >= 0; i--)
773 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
774 return err;
775}
776
777static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
778{
779 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
780 const struct rocker *rocker = rocker_port->rocker;
781 int i;
782
783 for (i = 0; i < rx_ring->size; i++)
784 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
785}
786
787static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
788{
789 struct rocker *rocker = rocker_port->rocker;
790 int err;
791
792 err = rocker_dma_ring_create(rocker,
793 ROCKER_DMA_TX(rocker_port->port_number),
794 ROCKER_DMA_TX_DEFAULT_SIZE,
795 &rocker_port->tx_ring);
796 if (err) {
797 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
798 return err;
799 }
800
801 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
802 DMA_TO_DEVICE,
803 ROCKER_DMA_TX_DESC_SIZE);
804 if (err) {
805 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
806 goto err_dma_tx_ring_bufs_alloc;
807 }
808
809 err = rocker_dma_ring_create(rocker,
810 ROCKER_DMA_RX(rocker_port->port_number),
811 ROCKER_DMA_RX_DEFAULT_SIZE,
812 &rocker_port->rx_ring);
813 if (err) {
814 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
815 goto err_dma_rx_ring_create;
816 }
817
818 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
819 DMA_BIDIRECTIONAL,
820 ROCKER_DMA_RX_DESC_SIZE);
821 if (err) {
822 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
823 goto err_dma_rx_ring_bufs_alloc;
824 }
825
826 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
827 if (err) {
828 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
829 goto err_dma_rx_ring_skbs_alloc;
830 }
831 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
832
833 return 0;
834
835err_dma_rx_ring_skbs_alloc:
836 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
837 DMA_BIDIRECTIONAL);
838err_dma_rx_ring_bufs_alloc:
839 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
840err_dma_rx_ring_create:
841 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
842 DMA_TO_DEVICE);
843err_dma_tx_ring_bufs_alloc:
844 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
845 return err;
846}
847
848static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
849{
850 struct rocker *rocker = rocker_port->rocker;
851
852 rocker_dma_rx_ring_skbs_free(rocker_port);
853 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
854 DMA_BIDIRECTIONAL);
855 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
856 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
857 DMA_TO_DEVICE);
858 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
859}
860
861static void rocker_port_set_enable(const struct rocker_port *rocker_port,
862 bool enable)
863{
864 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
865
866 if (enable)
867 val |= 1ULL << rocker_port->pport;
868 else
869 val &= ~(1ULL << rocker_port->pport);
870 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
871}
872
873/********************************
874 * Interrupt handler and helpers
875 ********************************/
876
877static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
878{
879 struct rocker *rocker = dev_id;
880 const struct rocker_desc_info *desc_info;
881 struct rocker_wait *wait;
882 u32 credits = 0;
883
884 spin_lock(&rocker->cmd_ring_lock);
885 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
886 wait = rocker_desc_cookie_ptr_get(desc_info);
887 if (wait->nowait) {
888 rocker_desc_gen_clear(desc_info);
889 } else {
890 rocker_wait_wake_up(wait);
891 }
892 credits++;
893 }
894 spin_unlock(&rocker->cmd_ring_lock);
895 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
896
897 return IRQ_HANDLED;
898}
899
900static void rocker_port_link_up(const struct rocker_port *rocker_port)
901{
902 netif_carrier_on(rocker_port->dev);
903 netdev_info(rocker_port->dev, "Link is up\n");
904}
905
906static void rocker_port_link_down(const struct rocker_port *rocker_port)
907{
908 netif_carrier_off(rocker_port->dev);
909 netdev_info(rocker_port->dev, "Link is down\n");
910}
911
912static int rocker_event_link_change(const struct rocker *rocker,
913 const struct rocker_tlv *info)
914{
915 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
916 unsigned int port_number;
917 bool link_up;
918 struct rocker_port *rocker_port;
919
920 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
921 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
922 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
923 return -EIO;
924 port_number =
925 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
926 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
927
928 if (port_number >= rocker->port_count)
929 return -EINVAL;
930
931 rocker_port = rocker->ports[port_number];
932 if (netif_carrier_ok(rocker_port->dev) != link_up) {
933 if (link_up)
934 rocker_port_link_up(rocker_port);
935 else
936 rocker_port_link_down(rocker_port);
937 }
938
939 return 0;
940}
941
942static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
943 const unsigned char *addr,
944 __be16 vlan_id);
945
946static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
947 const struct rocker_tlv *info)
948{
949 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
950 unsigned int port_number;
951 struct rocker_port *rocker_port;
952 const unsigned char *addr;
953 __be16 vlan_id;
954
955 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
956 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
957 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
958 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
959 return -EIO;
960 port_number =
961 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
962 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
963 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
964
965 if (port_number >= rocker->port_count)
966 return -EINVAL;
967
968 rocker_port = rocker->ports[port_number];
969 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
970}
971
972static int rocker_event_process(const struct rocker *rocker,
973 const struct rocker_desc_info *desc_info)
974{
975 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
976 const struct rocker_tlv *info;
977 u16 type;
978
979 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
980 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
981 !attrs[ROCKER_TLV_EVENT_INFO])
982 return -EIO;
983
984 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
985 info = attrs[ROCKER_TLV_EVENT_INFO];
986
987 switch (type) {
988 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
989 return rocker_event_link_change(rocker, info);
990 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
991 return rocker_event_mac_vlan_seen(rocker, info);
992 }
993
994 return -EOPNOTSUPP;
995}
996
997static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
998{
999 struct rocker *rocker = dev_id;
1000 const struct pci_dev *pdev = rocker->pdev;
1001 const struct rocker_desc_info *desc_info;
1002 u32 credits = 0;
1003 int err;
1004
1005 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1006 err = rocker_desc_err(desc_info);
1007 if (err) {
1008 dev_err(&pdev->dev, "event desc received with err %d\n",
1009 err);
1010 } else {
1011 err = rocker_event_process(rocker, desc_info);
1012 if (err)
1013 dev_err(&pdev->dev, "event processing failed with err %d\n",
1014 err);
1015 }
1016 rocker_desc_gen_clear(desc_info);
1017 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1018 credits++;
1019 }
1020 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1021
1022 return IRQ_HANDLED;
1023}
1024
1025static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026{
1027 struct rocker_port *rocker_port = dev_id;
1028
1029 napi_schedule(&rocker_port->napi_tx);
1030 return IRQ_HANDLED;
1031}
1032
1033static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034{
1035 struct rocker_port *rocker_port = dev_id;
1036
1037 napi_schedule(&rocker_port->napi_rx);
1038 return IRQ_HANDLED;
1039}
1040
1041/********************
1042 * Command interface
1043 ********************/
1044
1045int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047 rocker_cmd_proc_cb_t process, void *process_priv)
1048{
1049 struct rocker *rocker = rocker_port->rocker;
1050 struct rocker_desc_info *desc_info;
1051 struct rocker_wait *wait;
1052 unsigned long lock_flags;
1053 int err;
1054
1055 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1058 if (!desc_info) {
1059 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1060 return -EAGAIN;
1061 }
1062
1063 wait = rocker_desc_cookie_ptr_get(desc_info);
1064 rocker_wait_init(wait);
1065 wait->nowait = nowait;
1066
1067 err = prepare(rocker_port, desc_info, prepare_priv);
1068 if (err) {
1069 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1070 return err;
1071 }
1072
1073 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1074
1075 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1076
1077 if (nowait)
1078 return 0;
1079
1080 if (!rocker_wait_event_timeout(wait, HZ / 10))
1081 return -EIO;
1082
1083 err = rocker_desc_err(desc_info);
1084 if (err)
1085 return err;
1086
1087 if (process)
1088 err = process(rocker_port, desc_info, process_priv);
1089
1090 rocker_desc_gen_clear(desc_info);
1091 return err;
1092}
1093
1094static int
1095rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096 struct rocker_desc_info *desc_info,
1097 void *priv)
1098{
1099 struct rocker_tlv *cmd_info;
1100
1101 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1102 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1103 return -EMSGSIZE;
1104 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1105 if (!cmd_info)
1106 return -EMSGSIZE;
1107 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1108 rocker_port->pport))
1109 return -EMSGSIZE;
1110 rocker_tlv_nest_end(desc_info, cmd_info);
1111 return 0;
1112}
1113
1114static int
1115rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116 const struct rocker_desc_info *desc_info,
1117 void *priv)
1118{
1119 struct ethtool_link_ksettings *ecmd = priv;
1120 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122 u32 speed;
1123 u8 duplex;
1124 u8 autoneg;
1125
1126 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1127 if (!attrs[ROCKER_TLV_CMD_INFO])
1128 return -EIO;
1129
1130 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1131 attrs[ROCKER_TLV_CMD_INFO]);
1132 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1133 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1134 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1135 return -EIO;
1136
1137 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1138 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1139 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1140
1141 ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1142 ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1143
1144 ecmd->base.phy_address = 0xff;
1145 ecmd->base.port = PORT_TP;
1146 ecmd->base.speed = speed;
1147 ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1148 ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1149
1150 return 0;
1151}
1152
1153static int
1154rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155 const struct rocker_desc_info *desc_info,
1156 void *priv)
1157{
1158 unsigned char *macaddr = priv;
1159 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161 const struct rocker_tlv *attr;
1162
1163 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1164 if (!attrs[ROCKER_TLV_CMD_INFO])
1165 return -EIO;
1166
1167 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1168 attrs[ROCKER_TLV_CMD_INFO]);
1169 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1170 if (!attr)
1171 return -EIO;
1172
1173 if (rocker_tlv_len(attr) != ETH_ALEN)
1174 return -EINVAL;
1175
1176 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1177 return 0;
1178}
1179
1180static int
1181rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182 const struct rocker_desc_info *desc_info,
1183 void *priv)
1184{
1185 u8 *p_mode = priv;
1186 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188 const struct rocker_tlv *attr;
1189
1190 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1191 if (!attrs[ROCKER_TLV_CMD_INFO])
1192 return -EIO;
1193
1194 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1195 attrs[ROCKER_TLV_CMD_INFO]);
1196 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1197 if (!attr)
1198 return -EIO;
1199
1200 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1201 return 0;
1202}
1203
1204struct port_name {
1205 char *buf;
1206 size_t len;
1207};
1208
1209static int
1210rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211 const struct rocker_desc_info *desc_info,
1212 void *priv)
1213{
1214 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216 struct port_name *name = priv;
1217 const struct rocker_tlv *attr;
1218 size_t i, j, len;
1219 const char *str;
1220
1221 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1222 if (!attrs[ROCKER_TLV_CMD_INFO])
1223 return -EIO;
1224
1225 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1226 attrs[ROCKER_TLV_CMD_INFO]);
1227 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1228 if (!attr)
1229 return -EIO;
1230
1231 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1232 str = rocker_tlv_data(attr);
1233
1234 /* make sure name only contains alphanumeric characters */
1235 for (i = j = 0; i < len; ++i) {
1236 if (isalnum(str[i])) {
1237 name->buf[j] = str[i];
1238 j++;
1239 }
1240 }
1241
1242 if (j == 0)
1243 return -EIO;
1244
1245 name->buf[j] = '\0';
1246
1247 return 0;
1248}
1249
1250static int
1251rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252 struct rocker_desc_info *desc_info,
1253 void *priv)
1254{
1255 struct ethtool_link_ksettings *ecmd = priv;
1256 struct rocker_tlv *cmd_info;
1257
1258 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1259 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1260 return -EMSGSIZE;
1261 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1262 if (!cmd_info)
1263 return -EMSGSIZE;
1264 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1265 rocker_port->pport))
1266 return -EMSGSIZE;
1267 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1268 ecmd->base.speed))
1269 return -EMSGSIZE;
1270 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1271 ecmd->base.duplex))
1272 return -EMSGSIZE;
1273 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1274 ecmd->base.autoneg))
1275 return -EMSGSIZE;
1276 rocker_tlv_nest_end(desc_info, cmd_info);
1277 return 0;
1278}
1279
1280static int
1281rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282 struct rocker_desc_info *desc_info,
1283 void *priv)
1284{
1285 const unsigned char *macaddr = priv;
1286 struct rocker_tlv *cmd_info;
1287
1288 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1289 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1290 return -EMSGSIZE;
1291 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1292 if (!cmd_info)
1293 return -EMSGSIZE;
1294 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1295 rocker_port->pport))
1296 return -EMSGSIZE;
1297 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1298 ETH_ALEN, macaddr))
1299 return -EMSGSIZE;
1300 rocker_tlv_nest_end(desc_info, cmd_info);
1301 return 0;
1302}
1303
1304static int
1305rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306 struct rocker_desc_info *desc_info,
1307 void *priv)
1308{
1309 int mtu = *(int *)priv;
1310 struct rocker_tlv *cmd_info;
1311
1312 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1313 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1314 return -EMSGSIZE;
1315 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1316 if (!cmd_info)
1317 return -EMSGSIZE;
1318 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1319 rocker_port->pport))
1320 return -EMSGSIZE;
1321 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1322 mtu))
1323 return -EMSGSIZE;
1324 rocker_tlv_nest_end(desc_info, cmd_info);
1325 return 0;
1326}
1327
1328static int
1329rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330 struct rocker_desc_info *desc_info,
1331 void *priv)
1332{
1333 bool learning = *(bool *)priv;
1334 struct rocker_tlv *cmd_info;
1335
1336 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1337 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1338 return -EMSGSIZE;
1339 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1340 if (!cmd_info)
1341 return -EMSGSIZE;
1342 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1343 rocker_port->pport))
1344 return -EMSGSIZE;
1345 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1346 learning))
1347 return -EMSGSIZE;
1348 rocker_tlv_nest_end(desc_info, cmd_info);
1349 return 0;
1350}
1351
1352static int
1353rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354 struct ethtool_link_ksettings *ecmd)
1355{
1356 return rocker_cmd_exec(rocker_port, false,
1357 rocker_cmd_get_port_settings_prep, NULL,
1358 rocker_cmd_get_port_settings_ethtool_proc,
1359 ecmd);
1360}
1361
1362static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363 unsigned char *macaddr)
1364{
1365 return rocker_cmd_exec(rocker_port, false,
1366 rocker_cmd_get_port_settings_prep, NULL,
1367 rocker_cmd_get_port_settings_macaddr_proc,
1368 macaddr);
1369}
1370
1371static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372 u8 *p_mode)
1373{
1374 return rocker_cmd_exec(rocker_port, false,
1375 rocker_cmd_get_port_settings_prep, NULL,
1376 rocker_cmd_get_port_settings_mode_proc, p_mode);
1377}
1378
1379static int
1380rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381 const struct ethtool_link_ksettings *ecmd)
1382{
1383 struct ethtool_link_ksettings copy_ecmd;
1384
1385 memcpy(©_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387 return rocker_cmd_exec(rocker_port, false,
1388 rocker_cmd_set_port_settings_ethtool_prep,
1389 ©_ecmd, NULL, NULL);
1390}
1391
1392static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393 unsigned char *macaddr)
1394{
1395 return rocker_cmd_exec(rocker_port, false,
1396 rocker_cmd_set_port_settings_macaddr_prep,
1397 macaddr, NULL, NULL);
1398}
1399
1400static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401 int mtu)
1402{
1403 return rocker_cmd_exec(rocker_port, false,
1404 rocker_cmd_set_port_settings_mtu_prep,
1405 &mtu, NULL, NULL);
1406}
1407
1408int rocker_port_set_learning(struct rocker_port *rocker_port,
1409 bool learning)
1410{
1411 return rocker_cmd_exec(rocker_port, false,
1412 rocker_cmd_set_port_learning_prep,
1413 &learning, NULL, NULL);
1414}
1415
1416/**********************
1417 * Worlds manipulation
1418 **********************/
1419
1420static struct rocker_world_ops *rocker_world_ops[] = {
1421 &rocker_ofdpa_ops,
1422};
1423
1424#define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427{
1428 int i;
1429
1430 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431 if (rocker_world_ops[i]->mode == mode)
1432 return rocker_world_ops[i];
1433 return NULL;
1434}
1435
1436static int rocker_world_init(struct rocker *rocker, u8 mode)
1437{
1438 struct rocker_world_ops *wops;
1439 int err;
1440
1441 wops = rocker_world_ops_find(mode);
1442 if (!wops) {
1443 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444 mode);
1445 return -EINVAL;
1446 }
1447 rocker->wops = wops;
1448 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1449 if (!rocker->wpriv)
1450 return -ENOMEM;
1451 if (!wops->init)
1452 return 0;
1453 err = wops->init(rocker);
1454 if (err)
1455 kfree(rocker->wpriv);
1456 return err;
1457}
1458
1459static void rocker_world_fini(struct rocker *rocker)
1460{
1461 struct rocker_world_ops *wops = rocker->wops;
1462
1463 if (!wops || !wops->fini)
1464 return;
1465 wops->fini(rocker);
1466 kfree(rocker->wpriv);
1467}
1468
1469static int rocker_world_check_init(struct rocker_port *rocker_port)
1470{
1471 struct rocker *rocker = rocker_port->rocker;
1472 u8 mode;
1473 int err;
1474
1475 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1476 if (err) {
1477 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478 return err;
1479 }
1480 if (rocker->wops) {
1481 if (rocker->wops->mode != mode) {
1482 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483 return -EINVAL;
1484 }
1485 return 0;
1486 }
1487 return rocker_world_init(rocker, mode);
1488}
1489
1490static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491{
1492 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493 int err;
1494
1495 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1496 if (!rocker_port->wpriv)
1497 return -ENOMEM;
1498 if (!wops->port_pre_init)
1499 return 0;
1500 err = wops->port_pre_init(rocker_port);
1501 if (err)
1502 kfree(rocker_port->wpriv);
1503 return 0;
1504}
1505
1506static int rocker_world_port_init(struct rocker_port *rocker_port)
1507{
1508 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510 if (!wops->port_init)
1511 return 0;
1512 return wops->port_init(rocker_port);
1513}
1514
1515static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516{
1517 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519 if (!wops->port_fini)
1520 return;
1521 wops->port_fini(rocker_port);
1522}
1523
1524static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525{
1526 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528 if (!wops->port_post_fini)
1529 return;
1530 wops->port_post_fini(rocker_port);
1531 kfree(rocker_port->wpriv);
1532}
1533
1534static int rocker_world_port_open(struct rocker_port *rocker_port)
1535{
1536 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538 if (!wops->port_open)
1539 return 0;
1540 return wops->port_open(rocker_port);
1541}
1542
1543static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544{
1545 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547 if (!wops->port_stop)
1548 return;
1549 wops->port_stop(rocker_port);
1550}
1551
1552static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553 u8 state)
1554{
1555 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1556
1557 if (!wops->port_attr_stp_state_set)
1558 return -EOPNOTSUPP;
1559
1560 return wops->port_attr_stp_state_set(rocker_port, state);
1561}
1562
1563static int
1564rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1565 rocker_port,
1566 unsigned long *
1567 p_brport_flags_support)
1568{
1569 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1570
1571 if (!wops->port_attr_bridge_flags_support_get)
1572 return -EOPNOTSUPP;
1573 return wops->port_attr_bridge_flags_support_get(rocker_port,
1574 p_brport_flags_support);
1575}
1576
1577static int
1578rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1579 struct switchdev_brport_flags flags)
1580{
1581 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1582 unsigned long brport_flags_s;
1583 int err;
1584
1585 if (!wops->port_attr_bridge_flags_set)
1586 return -EOPNOTSUPP;
1587
1588 err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1589 &brport_flags_s);
1590 if (err)
1591 return err;
1592
1593 if (flags.mask & ~brport_flags_s)
1594 return -EINVAL;
1595
1596 return 0;
1597}
1598
1599static int
1600rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1601 struct switchdev_brport_flags flags)
1602{
1603 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1604
1605 if (!wops->port_attr_bridge_flags_set)
1606 return -EOPNOTSUPP;
1607
1608 return wops->port_attr_bridge_flags_set(rocker_port, flags.val);
1609}
1610
1611static int
1612rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1613 u32 ageing_time)
1614{
1615 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1616
1617 if (!wops->port_attr_bridge_ageing_time_set)
1618 return -EOPNOTSUPP;
1619
1620 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time);
1621}
1622
1623static int
1624rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1625 const struct switchdev_obj_port_vlan *vlan)
1626{
1627 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629 if (!wops->port_obj_vlan_add)
1630 return -EOPNOTSUPP;
1631
1632 return wops->port_obj_vlan_add(rocker_port, vlan);
1633}
1634
1635static int
1636rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1637 const struct switchdev_obj_port_vlan *vlan)
1638{
1639 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1640
1641 if (netif_is_bridge_master(vlan->obj.orig_dev))
1642 return -EOPNOTSUPP;
1643
1644 if (!wops->port_obj_vlan_del)
1645 return -EOPNOTSUPP;
1646 return wops->port_obj_vlan_del(rocker_port, vlan);
1647}
1648
1649static int
1650rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1651 struct switchdev_notifier_fdb_info *info)
1652{
1653 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1654
1655 if (!wops->port_obj_fdb_add)
1656 return -EOPNOTSUPP;
1657
1658 return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1659}
1660
1661static int
1662rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1663 struct switchdev_notifier_fdb_info *info)
1664{
1665 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1666
1667 if (!wops->port_obj_fdb_del)
1668 return -EOPNOTSUPP;
1669 return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1670}
1671
1672static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1673 struct net_device *master,
1674 struct netlink_ext_ack *extack)
1675{
1676 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1677
1678 if (!wops->port_master_linked)
1679 return -EOPNOTSUPP;
1680 return wops->port_master_linked(rocker_port, master, extack);
1681}
1682
1683static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1684 struct net_device *master)
1685{
1686 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1687
1688 if (!wops->port_master_unlinked)
1689 return -EOPNOTSUPP;
1690 return wops->port_master_unlinked(rocker_port, master);
1691}
1692
1693static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1694 struct neighbour *n)
1695{
1696 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1697
1698 if (!wops->port_neigh_update)
1699 return -EOPNOTSUPP;
1700 return wops->port_neigh_update(rocker_port, n);
1701}
1702
1703static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1704 struct neighbour *n)
1705{
1706 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1707
1708 if (!wops->port_neigh_destroy)
1709 return -EOPNOTSUPP;
1710 return wops->port_neigh_destroy(rocker_port, n);
1711}
1712
1713static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1714 const unsigned char *addr,
1715 __be16 vlan_id)
1716{
1717 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1718
1719 if (!wops->port_ev_mac_vlan_seen)
1720 return -EOPNOTSUPP;
1721 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1722}
1723
1724static int rocker_world_fib4_add(struct rocker *rocker,
1725 const struct fib_entry_notifier_info *fen_info)
1726{
1727 struct rocker_world_ops *wops = rocker->wops;
1728
1729 if (!wops->fib4_add)
1730 return 0;
1731 return wops->fib4_add(rocker, fen_info);
1732}
1733
1734static int rocker_world_fib4_del(struct rocker *rocker,
1735 const struct fib_entry_notifier_info *fen_info)
1736{
1737 struct rocker_world_ops *wops = rocker->wops;
1738
1739 if (!wops->fib4_del)
1740 return 0;
1741 return wops->fib4_del(rocker, fen_info);
1742}
1743
1744static void rocker_world_fib4_abort(struct rocker *rocker)
1745{
1746 struct rocker_world_ops *wops = rocker->wops;
1747
1748 if (wops->fib4_abort)
1749 wops->fib4_abort(rocker);
1750}
1751
1752/*****************
1753 * Net device ops
1754 *****************/
1755
1756static int rocker_port_open(struct net_device *dev)
1757{
1758 struct rocker_port *rocker_port = netdev_priv(dev);
1759 int err;
1760
1761 err = rocker_port_dma_rings_init(rocker_port);
1762 if (err)
1763 return err;
1764
1765 err = request_irq(rocker_msix_tx_vector(rocker_port),
1766 rocker_tx_irq_handler, 0,
1767 rocker_driver_name, rocker_port);
1768 if (err) {
1769 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1770 goto err_request_tx_irq;
1771 }
1772
1773 err = request_irq(rocker_msix_rx_vector(rocker_port),
1774 rocker_rx_irq_handler, 0,
1775 rocker_driver_name, rocker_port);
1776 if (err) {
1777 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1778 goto err_request_rx_irq;
1779 }
1780
1781 err = rocker_world_port_open(rocker_port);
1782 if (err) {
1783 netdev_err(rocker_port->dev, "cannot open port in world\n");
1784 goto err_world_port_open;
1785 }
1786
1787 napi_enable(&rocker_port->napi_tx);
1788 napi_enable(&rocker_port->napi_rx);
1789 if (!dev->proto_down)
1790 rocker_port_set_enable(rocker_port, true);
1791 netif_start_queue(dev);
1792 return 0;
1793
1794err_world_port_open:
1795 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1796err_request_rx_irq:
1797 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1798err_request_tx_irq:
1799 rocker_port_dma_rings_fini(rocker_port);
1800 return err;
1801}
1802
1803static int rocker_port_stop(struct net_device *dev)
1804{
1805 struct rocker_port *rocker_port = netdev_priv(dev);
1806
1807 netif_stop_queue(dev);
1808 rocker_port_set_enable(rocker_port, false);
1809 napi_disable(&rocker_port->napi_rx);
1810 napi_disable(&rocker_port->napi_tx);
1811 rocker_world_port_stop(rocker_port);
1812 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1813 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1814 rocker_port_dma_rings_fini(rocker_port);
1815
1816 return 0;
1817}
1818
1819static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1820 const struct rocker_desc_info *desc_info)
1821{
1822 const struct rocker *rocker = rocker_port->rocker;
1823 struct pci_dev *pdev = rocker->pdev;
1824 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1825 struct rocker_tlv *attr;
1826 int rem;
1827
1828 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1829 if (!attrs[ROCKER_TLV_TX_FRAGS])
1830 return;
1831 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1832 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1833 dma_addr_t dma_handle;
1834 size_t len;
1835
1836 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1837 continue;
1838 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1839 attr);
1840 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1841 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1842 continue;
1843 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1844 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1845 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1846 }
1847}
1848
1849static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1850 struct rocker_desc_info *desc_info,
1851 char *buf, size_t buf_len)
1852{
1853 const struct rocker *rocker = rocker_port->rocker;
1854 struct pci_dev *pdev = rocker->pdev;
1855 dma_addr_t dma_handle;
1856 struct rocker_tlv *frag;
1857
1858 dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1859 if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1860 if (net_ratelimit())
1861 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1862 return -EIO;
1863 }
1864 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1865 if (!frag)
1866 goto unmap_frag;
1867 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1868 dma_handle))
1869 goto nest_cancel;
1870 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1871 buf_len))
1872 goto nest_cancel;
1873 rocker_tlv_nest_end(desc_info, frag);
1874 return 0;
1875
1876nest_cancel:
1877 rocker_tlv_nest_cancel(desc_info, frag);
1878unmap_frag:
1879 dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1880 return -EMSGSIZE;
1881}
1882
1883static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1884{
1885 struct rocker_port *rocker_port = netdev_priv(dev);
1886 struct rocker *rocker = rocker_port->rocker;
1887 struct rocker_desc_info *desc_info;
1888 struct rocker_tlv *frags;
1889 int i;
1890 int err;
1891
1892 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1893 if (unlikely(!desc_info)) {
1894 if (net_ratelimit())
1895 netdev_err(dev, "tx ring full when queue awake\n");
1896 return NETDEV_TX_BUSY;
1897 }
1898
1899 rocker_desc_cookie_ptr_set(desc_info, skb);
1900
1901 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1902 if (!frags)
1903 goto out;
1904 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1905 skb->data, skb_headlen(skb));
1906 if (err)
1907 goto nest_cancel;
1908 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1909 err = skb_linearize(skb);
1910 if (err)
1911 goto unmap_frags;
1912 }
1913
1914 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1915 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1916
1917 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1918 skb_frag_address(frag),
1919 skb_frag_size(frag));
1920 if (err)
1921 goto unmap_frags;
1922 }
1923 rocker_tlv_nest_end(desc_info, frags);
1924
1925 rocker_desc_gen_clear(desc_info);
1926 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1927
1928 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1929 if (!desc_info)
1930 netif_stop_queue(dev);
1931
1932 return NETDEV_TX_OK;
1933
1934unmap_frags:
1935 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1936nest_cancel:
1937 rocker_tlv_nest_cancel(desc_info, frags);
1938out:
1939 dev_kfree_skb(skb);
1940 dev->stats.tx_dropped++;
1941
1942 return NETDEV_TX_OK;
1943}
1944
1945static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1946{
1947 struct sockaddr *addr = p;
1948 struct rocker_port *rocker_port = netdev_priv(dev);
1949 int err;
1950
1951 if (!is_valid_ether_addr(addr->sa_data))
1952 return -EADDRNOTAVAIL;
1953
1954 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1955 if (err)
1956 return err;
1957 eth_hw_addr_set(dev, addr->sa_data);
1958 return 0;
1959}
1960
1961static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1962{
1963 struct rocker_port *rocker_port = netdev_priv(dev);
1964 int running = netif_running(dev);
1965 int err;
1966
1967 if (running)
1968 rocker_port_stop(dev);
1969
1970 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1971 dev->mtu = new_mtu;
1972
1973 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1974 if (err)
1975 return err;
1976
1977 if (running)
1978 err = rocker_port_open(dev);
1979
1980 return err;
1981}
1982
1983static int rocker_port_get_phys_port_name(struct net_device *dev,
1984 char *buf, size_t len)
1985{
1986 struct rocker_port *rocker_port = netdev_priv(dev);
1987 struct port_name name = { .buf = buf, .len = len };
1988 int err;
1989
1990 err = rocker_cmd_exec(rocker_port, false,
1991 rocker_cmd_get_port_settings_prep, NULL,
1992 rocker_cmd_get_port_settings_phys_name_proc,
1993 &name);
1994
1995 return err ? -EOPNOTSUPP : 0;
1996}
1997
1998static void rocker_port_neigh_destroy(struct net_device *dev,
1999 struct neighbour *n)
2000{
2001 struct rocker_port *rocker_port = netdev_priv(n->dev);
2002 int err;
2003
2004 err = rocker_world_port_neigh_destroy(rocker_port, n);
2005 if (err)
2006 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2007 err);
2008}
2009
2010static int rocker_port_get_port_parent_id(struct net_device *dev,
2011 struct netdev_phys_item_id *ppid)
2012{
2013 const struct rocker_port *rocker_port = netdev_priv(dev);
2014 const struct rocker *rocker = rocker_port->rocker;
2015
2016 ppid->id_len = sizeof(rocker->hw.id);
2017 memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2018
2019 return 0;
2020}
2021
2022static const struct net_device_ops rocker_port_netdev_ops = {
2023 .ndo_open = rocker_port_open,
2024 .ndo_stop = rocker_port_stop,
2025 .ndo_start_xmit = rocker_port_xmit,
2026 .ndo_set_mac_address = rocker_port_set_mac_address,
2027 .ndo_change_mtu = rocker_port_change_mtu,
2028 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2029 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2030 .ndo_get_port_parent_id = rocker_port_get_port_parent_id,
2031};
2032
2033/********************
2034 * swdev interface
2035 ********************/
2036
2037static int rocker_port_attr_set(struct net_device *dev,
2038 const struct switchdev_attr *attr)
2039{
2040 struct rocker_port *rocker_port = netdev_priv(dev);
2041 int err = 0;
2042
2043 switch (attr->id) {
2044 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2045 err = rocker_world_port_attr_stp_state_set(rocker_port,
2046 attr->u.stp_state);
2047 break;
2048 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2049 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2050 attr->u.brport_flags);
2051 break;
2052 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2053 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2054 attr->u.brport_flags);
2055 break;
2056 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2057 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2058 attr->u.ageing_time);
2059 break;
2060 default:
2061 err = -EOPNOTSUPP;
2062 break;
2063 }
2064
2065 return err;
2066}
2067
2068static int rocker_port_obj_add(struct net_device *dev,
2069 const struct switchdev_obj *obj)
2070{
2071 struct rocker_port *rocker_port = netdev_priv(dev);
2072 int err = 0;
2073
2074 switch (obj->id) {
2075 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2076 err = rocker_world_port_obj_vlan_add(rocker_port,
2077 SWITCHDEV_OBJ_PORT_VLAN(obj));
2078 break;
2079 default:
2080 err = -EOPNOTSUPP;
2081 break;
2082 }
2083
2084 return err;
2085}
2086
2087static int rocker_port_obj_del(struct net_device *dev,
2088 const struct switchdev_obj *obj)
2089{
2090 struct rocker_port *rocker_port = netdev_priv(dev);
2091 int err = 0;
2092
2093 switch (obj->id) {
2094 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2095 err = rocker_world_port_obj_vlan_del(rocker_port,
2096 SWITCHDEV_OBJ_PORT_VLAN(obj));
2097 break;
2098 default:
2099 err = -EOPNOTSUPP;
2100 break;
2101 }
2102
2103 return err;
2104}
2105
2106struct rocker_fib_event_work {
2107 struct work_struct work;
2108 union {
2109 struct fib_entry_notifier_info fen_info;
2110 struct fib_rule_notifier_info fr_info;
2111 };
2112 struct rocker *rocker;
2113 unsigned long event;
2114};
2115
2116static void rocker_router_fib_event_work(struct work_struct *work)
2117{
2118 struct rocker_fib_event_work *fib_work =
2119 container_of(work, struct rocker_fib_event_work, work);
2120 struct rocker *rocker = fib_work->rocker;
2121 struct fib_rule *rule;
2122 int err;
2123
2124 /* Protect internal structures from changes */
2125 rtnl_lock();
2126 switch (fib_work->event) {
2127 case FIB_EVENT_ENTRY_REPLACE:
2128 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2129 if (err)
2130 rocker_world_fib4_abort(rocker);
2131 fib_info_put(fib_work->fen_info.fi);
2132 break;
2133 case FIB_EVENT_ENTRY_DEL:
2134 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2135 fib_info_put(fib_work->fen_info.fi);
2136 break;
2137 case FIB_EVENT_RULE_ADD:
2138 case FIB_EVENT_RULE_DEL:
2139 rule = fib_work->fr_info.rule;
2140 if (!fib4_rule_default(rule))
2141 rocker_world_fib4_abort(rocker);
2142 fib_rule_put(rule);
2143 break;
2144 }
2145 rtnl_unlock();
2146 kfree(fib_work);
2147}
2148
2149/* Called with rcu_read_lock() */
2150static int rocker_router_fib_event(struct notifier_block *nb,
2151 unsigned long event, void *ptr)
2152{
2153 struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2154 struct rocker_fib_event_work *fib_work;
2155 struct fib_notifier_info *info = ptr;
2156
2157 if (info->family != AF_INET)
2158 return NOTIFY_DONE;
2159
2160 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2161 if (WARN_ON(!fib_work))
2162 return NOTIFY_BAD;
2163
2164 INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2165 fib_work->rocker = rocker;
2166 fib_work->event = event;
2167
2168 switch (event) {
2169 case FIB_EVENT_ENTRY_REPLACE:
2170 case FIB_EVENT_ENTRY_DEL:
2171 if (info->family == AF_INET) {
2172 struct fib_entry_notifier_info *fen_info = ptr;
2173
2174 if (fen_info->fi->fib_nh_is_v6) {
2175 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2176 kfree(fib_work);
2177 return notifier_from_errno(-EINVAL);
2178 }
2179 if (fen_info->fi->nh) {
2180 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2181 kfree(fib_work);
2182 return notifier_from_errno(-EINVAL);
2183 }
2184 }
2185
2186 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2187 /* Take referece on fib_info to prevent it from being
2188 * freed while work is queued. Release it afterwards.
2189 */
2190 fib_info_hold(fib_work->fen_info.fi);
2191 break;
2192 case FIB_EVENT_RULE_ADD:
2193 case FIB_EVENT_RULE_DEL:
2194 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2195 fib_rule_get(fib_work->fr_info.rule);
2196 break;
2197 }
2198
2199 queue_work(rocker->rocker_owq, &fib_work->work);
2200
2201 return NOTIFY_DONE;
2202}
2203
2204/********************
2205 * ethtool interface
2206 ********************/
2207
2208static int
2209rocker_port_get_link_ksettings(struct net_device *dev,
2210 struct ethtool_link_ksettings *ecmd)
2211{
2212 struct rocker_port *rocker_port = netdev_priv(dev);
2213
2214 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2215}
2216
2217static int
2218rocker_port_set_link_ksettings(struct net_device *dev,
2219 const struct ethtool_link_ksettings *ecmd)
2220{
2221 struct rocker_port *rocker_port = netdev_priv(dev);
2222
2223 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2224}
2225
2226static void rocker_port_get_drvinfo(struct net_device *dev,
2227 struct ethtool_drvinfo *drvinfo)
2228{
2229 strscpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2230 strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2231}
2232
2233static struct rocker_port_stats {
2234 char str[ETH_GSTRING_LEN];
2235 int type;
2236} rocker_port_stats[] = {
2237 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2238 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2239 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2240 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2241
2242 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2243 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2244 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2245 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2246};
2247
2248#define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2249
2250static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2251 u8 *data)
2252{
2253 u8 *p = data;
2254 int i;
2255
2256 switch (stringset) {
2257 case ETH_SS_STATS:
2258 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2259 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2260 p += ETH_GSTRING_LEN;
2261 }
2262 break;
2263 }
2264}
2265
2266static int
2267rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2268 struct rocker_desc_info *desc_info,
2269 void *priv)
2270{
2271 struct rocker_tlv *cmd_stats;
2272
2273 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2274 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2275 return -EMSGSIZE;
2276
2277 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2278 if (!cmd_stats)
2279 return -EMSGSIZE;
2280
2281 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2282 rocker_port->pport))
2283 return -EMSGSIZE;
2284
2285 rocker_tlv_nest_end(desc_info, cmd_stats);
2286
2287 return 0;
2288}
2289
2290static int
2291rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2292 const struct rocker_desc_info *desc_info,
2293 void *priv)
2294{
2295 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2296 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2297 const struct rocker_tlv *pattr;
2298 u32 pport;
2299 u64 *data = priv;
2300 int i;
2301
2302 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2303
2304 if (!attrs[ROCKER_TLV_CMD_INFO])
2305 return -EIO;
2306
2307 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2308 attrs[ROCKER_TLV_CMD_INFO]);
2309
2310 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2311 return -EIO;
2312
2313 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2314 if (pport != rocker_port->pport)
2315 return -EIO;
2316
2317 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2318 pattr = stats_attrs[rocker_port_stats[i].type];
2319 if (!pattr)
2320 continue;
2321
2322 data[i] = rocker_tlv_get_u64(pattr);
2323 }
2324
2325 return 0;
2326}
2327
2328static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2329 void *priv)
2330{
2331 return rocker_cmd_exec(rocker_port, false,
2332 rocker_cmd_get_port_stats_prep, NULL,
2333 rocker_cmd_get_port_stats_ethtool_proc,
2334 priv);
2335}
2336
2337static void rocker_port_get_stats(struct net_device *dev,
2338 struct ethtool_stats *stats, u64 *data)
2339{
2340 struct rocker_port *rocker_port = netdev_priv(dev);
2341
2342 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2343 int i;
2344
2345 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2346 data[i] = 0;
2347 }
2348}
2349
2350static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2351{
2352 switch (sset) {
2353 case ETH_SS_STATS:
2354 return ROCKER_PORT_STATS_LEN;
2355 default:
2356 return -EOPNOTSUPP;
2357 }
2358}
2359
2360static const struct ethtool_ops rocker_port_ethtool_ops = {
2361 .get_drvinfo = rocker_port_get_drvinfo,
2362 .get_link = ethtool_op_get_link,
2363 .get_strings = rocker_port_get_strings,
2364 .get_ethtool_stats = rocker_port_get_stats,
2365 .get_sset_count = rocker_port_get_sset_count,
2366 .get_link_ksettings = rocker_port_get_link_ksettings,
2367 .set_link_ksettings = rocker_port_set_link_ksettings,
2368};
2369
2370/*****************
2371 * NAPI interface
2372 *****************/
2373
2374static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2375{
2376 return container_of(napi, struct rocker_port, napi_tx);
2377}
2378
2379static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2380{
2381 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2382 const struct rocker *rocker = rocker_port->rocker;
2383 const struct rocker_desc_info *desc_info;
2384 u32 credits = 0;
2385 int err;
2386
2387 /* Cleanup tx descriptors */
2388 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2389 struct sk_buff *skb;
2390
2391 err = rocker_desc_err(desc_info);
2392 if (err && net_ratelimit())
2393 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2394 err);
2395 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2396
2397 skb = rocker_desc_cookie_ptr_get(desc_info);
2398 if (err == 0) {
2399 rocker_port->dev->stats.tx_packets++;
2400 rocker_port->dev->stats.tx_bytes += skb->len;
2401 } else {
2402 rocker_port->dev->stats.tx_errors++;
2403 }
2404
2405 dev_kfree_skb_any(skb);
2406 credits++;
2407 }
2408
2409 if (credits && netif_queue_stopped(rocker_port->dev))
2410 netif_wake_queue(rocker_port->dev);
2411
2412 napi_complete(napi);
2413 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2414
2415 return 0;
2416}
2417
2418static int rocker_port_rx_proc(const struct rocker *rocker,
2419 const struct rocker_port *rocker_port,
2420 struct rocker_desc_info *desc_info)
2421{
2422 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2423 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2424 size_t rx_len;
2425 u16 rx_flags = 0;
2426
2427 if (!skb)
2428 return -ENOENT;
2429
2430 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2431 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2432 return -EINVAL;
2433 if (attrs[ROCKER_TLV_RX_FLAGS])
2434 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2435
2436 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2437
2438 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2439 skb_put(skb, rx_len);
2440 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2441
2442 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2443 skb->offload_fwd_mark = 1;
2444
2445 rocker_port->dev->stats.rx_packets++;
2446 rocker_port->dev->stats.rx_bytes += skb->len;
2447
2448 netif_receive_skb(skb);
2449
2450 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2451}
2452
2453static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2454{
2455 return container_of(napi, struct rocker_port, napi_rx);
2456}
2457
2458static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2459{
2460 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2461 const struct rocker *rocker = rocker_port->rocker;
2462 struct rocker_desc_info *desc_info;
2463 u32 credits = 0;
2464 int err;
2465
2466 /* Process rx descriptors */
2467 while (credits < budget &&
2468 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2469 err = rocker_desc_err(desc_info);
2470 if (err) {
2471 if (net_ratelimit())
2472 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2473 err);
2474 } else {
2475 err = rocker_port_rx_proc(rocker, rocker_port,
2476 desc_info);
2477 if (err && net_ratelimit())
2478 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2479 err);
2480 }
2481 if (err)
2482 rocker_port->dev->stats.rx_errors++;
2483
2484 rocker_desc_gen_clear(desc_info);
2485 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2486 credits++;
2487 }
2488
2489 if (credits < budget)
2490 napi_complete_done(napi, credits);
2491
2492 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2493
2494 return credits;
2495}
2496
2497/*****************
2498 * PCI driver ops
2499 *****************/
2500
2501static void rocker_carrier_init(const struct rocker_port *rocker_port)
2502{
2503 const struct rocker *rocker = rocker_port->rocker;
2504 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2505 bool link_up;
2506
2507 link_up = link_status & (1 << rocker_port->pport);
2508 if (link_up)
2509 netif_carrier_on(rocker_port->dev);
2510 else
2511 netif_carrier_off(rocker_port->dev);
2512}
2513
2514static void rocker_remove_ports(struct rocker *rocker)
2515{
2516 struct rocker_port *rocker_port;
2517 int i;
2518
2519 for (i = 0; i < rocker->port_count; i++) {
2520 rocker_port = rocker->ports[i];
2521 if (!rocker_port)
2522 continue;
2523 rocker_world_port_fini(rocker_port);
2524 unregister_netdev(rocker_port->dev);
2525 rocker_world_port_post_fini(rocker_port);
2526 free_netdev(rocker_port->dev);
2527 }
2528 rocker_world_fini(rocker);
2529 kfree(rocker->ports);
2530}
2531
2532static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2533{
2534 const struct rocker *rocker = rocker_port->rocker;
2535 const struct pci_dev *pdev = rocker->pdev;
2536 u8 addr[ETH_ALEN];
2537 int err;
2538
2539 err = rocker_cmd_get_port_settings_macaddr(rocker_port, addr);
2540 if (!err) {
2541 eth_hw_addr_set(rocker_port->dev, addr);
2542 } else {
2543 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2544 eth_hw_addr_random(rocker_port->dev);
2545 }
2546}
2547
2548#define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2549#define ROCKER_PORT_MAX_MTU 9000
2550static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2551{
2552 struct pci_dev *pdev = rocker->pdev;
2553 struct rocker_port *rocker_port;
2554 struct net_device *dev;
2555 int err;
2556
2557 dev = alloc_etherdev(sizeof(struct rocker_port));
2558 if (!dev)
2559 return -ENOMEM;
2560 SET_NETDEV_DEV(dev, &pdev->dev);
2561 rocker_port = netdev_priv(dev);
2562 rocker_port->dev = dev;
2563 rocker_port->rocker = rocker;
2564 rocker_port->port_number = port_number;
2565 rocker_port->pport = port_number + 1;
2566
2567 err = rocker_world_check_init(rocker_port);
2568 if (err) {
2569 dev_err(&pdev->dev, "world init failed\n");
2570 goto err_world_check_init;
2571 }
2572
2573 rocker_port_dev_addr_init(rocker_port);
2574 dev->netdev_ops = &rocker_port_netdev_ops;
2575 dev->ethtool_ops = &rocker_port_ethtool_ops;
2576 netif_napi_add_tx(dev, &rocker_port->napi_tx, rocker_port_poll_tx);
2577 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx);
2578 rocker_carrier_init(rocker_port);
2579
2580 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2581
2582 /* MTU range: 68 - 9000 */
2583 dev->min_mtu = ROCKER_PORT_MIN_MTU;
2584 dev->max_mtu = ROCKER_PORT_MAX_MTU;
2585
2586 err = rocker_world_port_pre_init(rocker_port);
2587 if (err) {
2588 dev_err(&pdev->dev, "port world pre-init failed\n");
2589 goto err_world_port_pre_init;
2590 }
2591 err = register_netdev(dev);
2592 if (err) {
2593 dev_err(&pdev->dev, "register_netdev failed\n");
2594 goto err_register_netdev;
2595 }
2596 rocker->ports[port_number] = rocker_port;
2597
2598 err = rocker_world_port_init(rocker_port);
2599 if (err) {
2600 dev_err(&pdev->dev, "port world init failed\n");
2601 goto err_world_port_init;
2602 }
2603
2604 return 0;
2605
2606err_world_port_init:
2607 rocker->ports[port_number] = NULL;
2608 unregister_netdev(dev);
2609err_register_netdev:
2610 rocker_world_port_post_fini(rocker_port);
2611err_world_port_pre_init:
2612err_world_check_init:
2613 free_netdev(dev);
2614 return err;
2615}
2616
2617static int rocker_probe_ports(struct rocker *rocker)
2618{
2619 int i;
2620 size_t alloc_size;
2621 int err;
2622
2623 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2624 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2625 if (!rocker->ports)
2626 return -ENOMEM;
2627 for (i = 0; i < rocker->port_count; i++) {
2628 err = rocker_probe_port(rocker, i);
2629 if (err)
2630 goto remove_ports;
2631 }
2632 return 0;
2633
2634remove_ports:
2635 rocker_remove_ports(rocker);
2636 return err;
2637}
2638
2639static int rocker_msix_init(struct rocker *rocker)
2640{
2641 struct pci_dev *pdev = rocker->pdev;
2642 int msix_entries;
2643 int i;
2644 int err;
2645
2646 msix_entries = pci_msix_vec_count(pdev);
2647 if (msix_entries < 0)
2648 return msix_entries;
2649
2650 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2651 return -EINVAL;
2652
2653 rocker->msix_entries = kmalloc_array(msix_entries,
2654 sizeof(struct msix_entry),
2655 GFP_KERNEL);
2656 if (!rocker->msix_entries)
2657 return -ENOMEM;
2658
2659 for (i = 0; i < msix_entries; i++)
2660 rocker->msix_entries[i].entry = i;
2661
2662 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2663 if (err < 0)
2664 goto err_enable_msix;
2665
2666 return 0;
2667
2668err_enable_msix:
2669 kfree(rocker->msix_entries);
2670 return err;
2671}
2672
2673static void rocker_msix_fini(const struct rocker *rocker)
2674{
2675 pci_disable_msix(rocker->pdev);
2676 kfree(rocker->msix_entries);
2677}
2678
2679static bool rocker_port_dev_check(const struct net_device *dev)
2680{
2681 return dev->netdev_ops == &rocker_port_netdev_ops;
2682}
2683
2684static int
2685rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2686 struct switchdev_notifier_port_attr_info *port_attr_info)
2687{
2688 int err;
2689
2690 err = rocker_port_attr_set(netdev, port_attr_info->attr);
2691
2692 port_attr_info->handled = true;
2693 return notifier_from_errno(err);
2694}
2695
2696struct rocker_switchdev_event_work {
2697 struct work_struct work;
2698 struct switchdev_notifier_fdb_info fdb_info;
2699 struct rocker_port *rocker_port;
2700 unsigned long event;
2701};
2702
2703static void
2704rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2705 struct switchdev_notifier_fdb_info *recv_info)
2706{
2707 struct switchdev_notifier_fdb_info info = {};
2708
2709 info.addr = recv_info->addr;
2710 info.vid = recv_info->vid;
2711 info.offloaded = true;
2712 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2713 rocker_port->dev, &info.info, NULL);
2714}
2715
2716static void rocker_switchdev_event_work(struct work_struct *work)
2717{
2718 struct rocker_switchdev_event_work *switchdev_work =
2719 container_of(work, struct rocker_switchdev_event_work, work);
2720 struct rocker_port *rocker_port = switchdev_work->rocker_port;
2721 struct switchdev_notifier_fdb_info *fdb_info;
2722 int err;
2723
2724 rtnl_lock();
2725 switch (switchdev_work->event) {
2726 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2727 fdb_info = &switchdev_work->fdb_info;
2728 if (!fdb_info->added_by_user || fdb_info->is_local)
2729 break;
2730 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2731 if (err) {
2732 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2733 break;
2734 }
2735 rocker_fdb_offload_notify(rocker_port, fdb_info);
2736 break;
2737 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2738 fdb_info = &switchdev_work->fdb_info;
2739 if (!fdb_info->added_by_user || fdb_info->is_local)
2740 break;
2741 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2742 if (err)
2743 netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744 break;
2745 }
2746 rtnl_unlock();
2747
2748 kfree(switchdev_work->fdb_info.addr);
2749 kfree(switchdev_work);
2750 dev_put(rocker_port->dev);
2751}
2752
2753/* called under rcu_read_lock() */
2754static int rocker_switchdev_event(struct notifier_block *unused,
2755 unsigned long event, void *ptr)
2756{
2757 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2758 struct rocker_switchdev_event_work *switchdev_work;
2759 struct switchdev_notifier_fdb_info *fdb_info = ptr;
2760 struct rocker_port *rocker_port;
2761
2762 if (!rocker_port_dev_check(dev))
2763 return NOTIFY_DONE;
2764
2765 if (event == SWITCHDEV_PORT_ATTR_SET)
2766 return rocker_switchdev_port_attr_set_event(dev, ptr);
2767
2768 rocker_port = netdev_priv(dev);
2769 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2770 if (WARN_ON(!switchdev_work))
2771 return NOTIFY_BAD;
2772
2773 INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2774 switchdev_work->rocker_port = rocker_port;
2775 switchdev_work->event = event;
2776
2777 switch (event) {
2778 case SWITCHDEV_FDB_ADD_TO_DEVICE:
2779 case SWITCHDEV_FDB_DEL_TO_DEVICE:
2780 memcpy(&switchdev_work->fdb_info, ptr,
2781 sizeof(switchdev_work->fdb_info));
2782 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2783 if (unlikely(!switchdev_work->fdb_info.addr)) {
2784 kfree(switchdev_work);
2785 return NOTIFY_BAD;
2786 }
2787
2788 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2789 fdb_info->addr);
2790 /* Take a reference on the rocker device */
2791 dev_hold(dev);
2792 break;
2793 default:
2794 kfree(switchdev_work);
2795 return NOTIFY_DONE;
2796 }
2797
2798 queue_work(rocker_port->rocker->rocker_owq,
2799 &switchdev_work->work);
2800 return NOTIFY_DONE;
2801}
2802
2803static int
2804rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2805 struct switchdev_notifier_port_obj_info *port_obj_info)
2806{
2807 int err = -EOPNOTSUPP;
2808
2809 switch (event) {
2810 case SWITCHDEV_PORT_OBJ_ADD:
2811 err = rocker_port_obj_add(netdev, port_obj_info->obj);
2812 break;
2813 case SWITCHDEV_PORT_OBJ_DEL:
2814 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2815 break;
2816 }
2817
2818 port_obj_info->handled = true;
2819 return notifier_from_errno(err);
2820}
2821
2822static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2823 unsigned long event, void *ptr)
2824{
2825 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2826
2827 if (!rocker_port_dev_check(dev))
2828 return NOTIFY_DONE;
2829
2830 switch (event) {
2831 case SWITCHDEV_PORT_OBJ_ADD:
2832 case SWITCHDEV_PORT_OBJ_DEL:
2833 return rocker_switchdev_port_obj_event(event, dev, ptr);
2834 case SWITCHDEV_PORT_ATTR_SET:
2835 return rocker_switchdev_port_attr_set_event(dev, ptr);
2836 }
2837
2838 return NOTIFY_DONE;
2839}
2840
2841static struct notifier_block rocker_switchdev_notifier = {
2842 .notifier_call = rocker_switchdev_event,
2843};
2844
2845static struct notifier_block rocker_switchdev_blocking_notifier = {
2846 .notifier_call = rocker_switchdev_blocking_event,
2847};
2848
2849static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2850{
2851 struct notifier_block *nb;
2852 struct rocker *rocker;
2853 int err;
2854
2855 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2856 if (!rocker)
2857 return -ENOMEM;
2858
2859 err = pci_enable_device(pdev);
2860 if (err) {
2861 dev_err(&pdev->dev, "pci_enable_device failed\n");
2862 goto err_pci_enable_device;
2863 }
2864
2865 err = pci_request_regions(pdev, rocker_driver_name);
2866 if (err) {
2867 dev_err(&pdev->dev, "pci_request_regions failed\n");
2868 goto err_pci_request_regions;
2869 }
2870
2871 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2872 if (err) {
2873 dev_err(&pdev->dev, "dma_set_mask failed\n");
2874 goto err_pci_set_dma_mask;
2875 }
2876
2877 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2878 dev_err(&pdev->dev, "invalid PCI region size\n");
2879 err = -EINVAL;
2880 goto err_pci_resource_len_check;
2881 }
2882
2883 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2884 pci_resource_len(pdev, 0));
2885 if (!rocker->hw_addr) {
2886 dev_err(&pdev->dev, "ioremap failed\n");
2887 err = -EIO;
2888 goto err_ioremap;
2889 }
2890 pci_set_master(pdev);
2891
2892 rocker->pdev = pdev;
2893 pci_set_drvdata(pdev, rocker);
2894
2895 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2896
2897 err = rocker_msix_init(rocker);
2898 if (err) {
2899 dev_err(&pdev->dev, "MSI-X init failed\n");
2900 goto err_msix_init;
2901 }
2902
2903 err = rocker_basic_hw_test(rocker);
2904 if (err) {
2905 dev_err(&pdev->dev, "basic hw test failed\n");
2906 goto err_basic_hw_test;
2907 }
2908
2909 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2910
2911 err = rocker_dma_rings_init(rocker);
2912 if (err)
2913 goto err_dma_rings_init;
2914
2915 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2916 rocker_cmd_irq_handler, 0,
2917 rocker_driver_name, rocker);
2918 if (err) {
2919 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2920 goto err_request_cmd_irq;
2921 }
2922
2923 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2924 rocker_event_irq_handler, 0,
2925 rocker_driver_name, rocker);
2926 if (err) {
2927 dev_err(&pdev->dev, "cannot assign event irq\n");
2928 goto err_request_event_irq;
2929 }
2930
2931 rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2932 WQ_MEM_RECLAIM);
2933 if (!rocker->rocker_owq) {
2934 err = -ENOMEM;
2935 goto err_alloc_ordered_workqueue;
2936 }
2937
2938 err = rocker_probe_ports(rocker);
2939 if (err) {
2940 dev_err(&pdev->dev, "failed to probe ports\n");
2941 goto err_probe_ports;
2942 }
2943
2944 /* Only FIBs pointing to our own netdevs are programmed into
2945 * the device, so no need to pass a callback.
2946 */
2947 rocker->fib_nb.notifier_call = rocker_router_fib_event;
2948 err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2949 if (err)
2950 goto err_register_fib_notifier;
2951
2952 err = register_switchdev_notifier(&rocker_switchdev_notifier);
2953 if (err) {
2954 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2955 goto err_register_switchdev_notifier;
2956 }
2957
2958 nb = &rocker_switchdev_blocking_notifier;
2959 err = register_switchdev_blocking_notifier(nb);
2960 if (err) {
2961 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2962 goto err_register_switchdev_blocking_notifier;
2963 }
2964
2965 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2966
2967 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2968 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2969
2970 return 0;
2971
2972err_register_switchdev_blocking_notifier:
2973 unregister_switchdev_notifier(&rocker_switchdev_notifier);
2974err_register_switchdev_notifier:
2975 unregister_fib_notifier(&init_net, &rocker->fib_nb);
2976err_register_fib_notifier:
2977 rocker_remove_ports(rocker);
2978err_probe_ports:
2979 destroy_workqueue(rocker->rocker_owq);
2980err_alloc_ordered_workqueue:
2981 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2982err_request_event_irq:
2983 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2984err_request_cmd_irq:
2985 rocker_dma_rings_fini(rocker);
2986err_dma_rings_init:
2987err_basic_hw_test:
2988 rocker_msix_fini(rocker);
2989err_msix_init:
2990 iounmap(rocker->hw_addr);
2991err_ioremap:
2992err_pci_resource_len_check:
2993err_pci_set_dma_mask:
2994 pci_release_regions(pdev);
2995err_pci_request_regions:
2996 pci_disable_device(pdev);
2997err_pci_enable_device:
2998 kfree(rocker);
2999 return err;
3000}
3001
3002static void rocker_remove(struct pci_dev *pdev)
3003{
3004 struct rocker *rocker = pci_get_drvdata(pdev);
3005 struct notifier_block *nb;
3006
3007 nb = &rocker_switchdev_blocking_notifier;
3008 unregister_switchdev_blocking_notifier(nb);
3009
3010 unregister_switchdev_notifier(&rocker_switchdev_notifier);
3011 unregister_fib_notifier(&init_net, &rocker->fib_nb);
3012 rocker_remove_ports(rocker);
3013 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3014 destroy_workqueue(rocker->rocker_owq);
3015 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3016 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3017 rocker_dma_rings_fini(rocker);
3018 rocker_msix_fini(rocker);
3019 iounmap(rocker->hw_addr);
3020 pci_release_regions(rocker->pdev);
3021 pci_disable_device(rocker->pdev);
3022 kfree(rocker);
3023}
3024
3025static struct pci_driver rocker_pci_driver = {
3026 .name = rocker_driver_name,
3027 .id_table = rocker_pci_id_table,
3028 .probe = rocker_probe,
3029 .remove = rocker_remove,
3030};
3031
3032/************************************
3033 * Net device notifier event handler
3034 ************************************/
3035
3036static bool rocker_port_dev_check_under(const struct net_device *dev,
3037 struct rocker *rocker)
3038{
3039 struct rocker_port *rocker_port;
3040
3041 if (!rocker_port_dev_check(dev))
3042 return false;
3043
3044 rocker_port = netdev_priv(dev);
3045 if (rocker_port->rocker != rocker)
3046 return false;
3047
3048 return true;
3049}
3050
3051struct rocker_walk_data {
3052 struct rocker *rocker;
3053 struct rocker_port *port;
3054};
3055
3056static int rocker_lower_dev_walk(struct net_device *lower_dev,
3057 struct netdev_nested_priv *priv)
3058{
3059 struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3060 int ret = 0;
3061
3062 if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3063 data->port = netdev_priv(lower_dev);
3064 ret = 1;
3065 }
3066
3067 return ret;
3068}
3069
3070struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3071 struct rocker *rocker)
3072{
3073 struct netdev_nested_priv priv;
3074 struct rocker_walk_data data;
3075
3076 if (rocker_port_dev_check_under(dev, rocker))
3077 return netdev_priv(dev);
3078
3079 data.rocker = rocker;
3080 data.port = NULL;
3081 priv.data = (void *)&data;
3082 netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3083
3084 return data.port;
3085}
3086
3087static int rocker_netdevice_event(struct notifier_block *unused,
3088 unsigned long event, void *ptr)
3089{
3090 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
3091 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3092 struct netdev_notifier_changeupper_info *info;
3093 struct rocker_port *rocker_port;
3094 int err;
3095
3096 if (!rocker_port_dev_check(dev))
3097 return NOTIFY_DONE;
3098
3099 switch (event) {
3100 case NETDEV_CHANGEUPPER:
3101 info = ptr;
3102 if (!info->master)
3103 goto out;
3104 rocker_port = netdev_priv(dev);
3105 if (info->linking) {
3106 err = rocker_world_port_master_linked(rocker_port,
3107 info->upper_dev,
3108 extack);
3109 if (err)
3110 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3111 err);
3112 } else {
3113 err = rocker_world_port_master_unlinked(rocker_port,
3114 info->upper_dev);
3115 if (err)
3116 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3117 err);
3118 }
3119 }
3120out:
3121 return NOTIFY_DONE;
3122}
3123
3124static struct notifier_block rocker_netdevice_nb __read_mostly = {
3125 .notifier_call = rocker_netdevice_event,
3126};
3127
3128/************************************
3129 * Net event notifier event handler
3130 ************************************/
3131
3132static int rocker_netevent_event(struct notifier_block *unused,
3133 unsigned long event, void *ptr)
3134{
3135 struct rocker_port *rocker_port;
3136 struct net_device *dev;
3137 struct neighbour *n = ptr;
3138 int err;
3139
3140 switch (event) {
3141 case NETEVENT_NEIGH_UPDATE:
3142 if (n->tbl != &arp_tbl)
3143 return NOTIFY_DONE;
3144 dev = n->dev;
3145 if (!rocker_port_dev_check(dev))
3146 return NOTIFY_DONE;
3147 rocker_port = netdev_priv(dev);
3148 err = rocker_world_port_neigh_update(rocker_port, n);
3149 if (err)
3150 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3151 err);
3152 break;
3153 }
3154
3155 return NOTIFY_DONE;
3156}
3157
3158static struct notifier_block rocker_netevent_nb __read_mostly = {
3159 .notifier_call = rocker_netevent_event,
3160};
3161
3162/***********************
3163 * Module init and exit
3164 ***********************/
3165
3166static int __init rocker_module_init(void)
3167{
3168 int err;
3169
3170 register_netdevice_notifier(&rocker_netdevice_nb);
3171 register_netevent_notifier(&rocker_netevent_nb);
3172 err = pci_register_driver(&rocker_pci_driver);
3173 if (err)
3174 goto err_pci_register_driver;
3175 return 0;
3176
3177err_pci_register_driver:
3178 unregister_netevent_notifier(&rocker_netevent_nb);
3179 unregister_netdevice_notifier(&rocker_netdevice_nb);
3180 return err;
3181}
3182
3183static void __exit rocker_module_exit(void)
3184{
3185 unregister_netevent_notifier(&rocker_netevent_nb);
3186 unregister_netdevice_notifier(&rocker_netdevice_nb);
3187 pci_unregister_driver(&rocker_pci_driver);
3188}
3189
3190module_init(rocker_module_init);
3191module_exit(rocker_module_exit);
3192
3193MODULE_LICENSE("GPL v2");
3194MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3195MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3196MODULE_DESCRIPTION("Rocker switch device driver");
3197MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
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 <net/switchdev.h>
32#include <net/rtnetlink.h>
33#include <net/netevent.h>
34#include <net/arp.h>
35#include <linux/io-64-nonatomic-lo-hi.h>
36#include <generated/utsrelease.h>
37
38#include "rocker_hw.h"
39#include "rocker.h"
40#include "rocker_tlv.h"
41
42static const char rocker_driver_name[] = "rocker";
43
44static const struct pci_device_id rocker_pci_id_table[] = {
45 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
46 {0, }
47};
48
49struct rocker_wait {
50 wait_queue_head_t wait;
51 bool done;
52 bool nowait;
53};
54
55static void rocker_wait_reset(struct rocker_wait *wait)
56{
57 wait->done = false;
58 wait->nowait = false;
59}
60
61static void rocker_wait_init(struct rocker_wait *wait)
62{
63 init_waitqueue_head(&wait->wait);
64 rocker_wait_reset(wait);
65}
66
67static struct rocker_wait *rocker_wait_create(void)
68{
69 struct rocker_wait *wait;
70
71 wait = kzalloc(sizeof(*wait), GFP_KERNEL);
72 if (!wait)
73 return NULL;
74 return wait;
75}
76
77static void rocker_wait_destroy(struct rocker_wait *wait)
78{
79 kfree(wait);
80}
81
82static bool rocker_wait_event_timeout(struct rocker_wait *wait,
83 unsigned long timeout)
84{
85 wait_event_timeout(wait->wait, wait->done, HZ / 10);
86 if (!wait->done)
87 return false;
88 return true;
89}
90
91static void rocker_wait_wake_up(struct rocker_wait *wait)
92{
93 wait->done = true;
94 wake_up(&wait->wait);
95}
96
97static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
98{
99 return rocker->msix_entries[vector].vector;
100}
101
102static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
103{
104 return rocker_msix_vector(rocker_port->rocker,
105 ROCKER_MSIX_VEC_TX(rocker_port->port_number));
106}
107
108static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
109{
110 return rocker_msix_vector(rocker_port->rocker,
111 ROCKER_MSIX_VEC_RX(rocker_port->port_number));
112}
113
114#define rocker_write32(rocker, reg, val) \
115 writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
116#define rocker_read32(rocker, reg) \
117 readl((rocker)->hw_addr + (ROCKER_ ## reg))
118#define rocker_write64(rocker, reg, val) \
119 writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
120#define rocker_read64(rocker, reg) \
121 readq((rocker)->hw_addr + (ROCKER_ ## reg))
122
123/*****************************
124 * HW basic testing functions
125 *****************************/
126
127static int rocker_reg_test(const struct rocker *rocker)
128{
129 const struct pci_dev *pdev = rocker->pdev;
130 u64 test_reg;
131 u64 rnd;
132
133 rnd = prandom_u32();
134 rnd >>= 1;
135 rocker_write32(rocker, TEST_REG, rnd);
136 test_reg = rocker_read32(rocker, TEST_REG);
137 if (test_reg != rnd * 2) {
138 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
139 test_reg, rnd * 2);
140 return -EIO;
141 }
142
143 rnd = prandom_u32();
144 rnd <<= 31;
145 rnd |= prandom_u32();
146 rocker_write64(rocker, TEST_REG64, rnd);
147 test_reg = rocker_read64(rocker, TEST_REG64);
148 if (test_reg != rnd * 2) {
149 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
150 test_reg, rnd * 2);
151 return -EIO;
152 }
153
154 return 0;
155}
156
157static int rocker_dma_test_one(const struct rocker *rocker,
158 struct rocker_wait *wait, u32 test_type,
159 dma_addr_t dma_handle, const unsigned char *buf,
160 const unsigned char *expect, size_t size)
161{
162 const struct pci_dev *pdev = rocker->pdev;
163 int i;
164
165 rocker_wait_reset(wait);
166 rocker_write32(rocker, TEST_DMA_CTRL, test_type);
167
168 if (!rocker_wait_event_timeout(wait, HZ / 10)) {
169 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
170 return -EIO;
171 }
172
173 for (i = 0; i < size; i++) {
174 if (buf[i] != expect[i]) {
175 dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
176 buf[i], i, expect[i]);
177 return -EIO;
178 }
179 }
180 return 0;
181}
182
183#define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
184#define ROCKER_TEST_DMA_FILL_PATTERN 0x96
185
186static int rocker_dma_test_offset(const struct rocker *rocker,
187 struct rocker_wait *wait, int offset)
188{
189 struct pci_dev *pdev = rocker->pdev;
190 unsigned char *alloc;
191 unsigned char *buf;
192 unsigned char *expect;
193 dma_addr_t dma_handle;
194 int i;
195 int err;
196
197 alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
198 GFP_KERNEL | GFP_DMA);
199 if (!alloc)
200 return -ENOMEM;
201 buf = alloc + offset;
202 expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
203
204 dma_handle = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
205 PCI_DMA_BIDIRECTIONAL);
206 if (pci_dma_mapping_error(pdev, dma_handle)) {
207 err = -EIO;
208 goto free_alloc;
209 }
210
211 rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
212 rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
213
214 memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
215 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
216 dma_handle, buf, expect,
217 ROCKER_TEST_DMA_BUF_SIZE);
218 if (err)
219 goto unmap;
220
221 memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
222 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
223 dma_handle, buf, expect,
224 ROCKER_TEST_DMA_BUF_SIZE);
225 if (err)
226 goto unmap;
227
228 prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
229 for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
230 expect[i] = ~buf[i];
231 err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
232 dma_handle, buf, expect,
233 ROCKER_TEST_DMA_BUF_SIZE);
234 if (err)
235 goto unmap;
236
237unmap:
238 pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
239 PCI_DMA_BIDIRECTIONAL);
240free_alloc:
241 kfree(alloc);
242
243 return err;
244}
245
246static int rocker_dma_test(const struct rocker *rocker,
247 struct rocker_wait *wait)
248{
249 int i;
250 int err;
251
252 for (i = 0; i < 8; i++) {
253 err = rocker_dma_test_offset(rocker, wait, i);
254 if (err)
255 return err;
256 }
257 return 0;
258}
259
260static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
261{
262 struct rocker_wait *wait = dev_id;
263
264 rocker_wait_wake_up(wait);
265
266 return IRQ_HANDLED;
267}
268
269static int rocker_basic_hw_test(const struct rocker *rocker)
270{
271 const struct pci_dev *pdev = rocker->pdev;
272 struct rocker_wait wait;
273 int err;
274
275 err = rocker_reg_test(rocker);
276 if (err) {
277 dev_err(&pdev->dev, "reg test failed\n");
278 return err;
279 }
280
281 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
282 rocker_test_irq_handler, 0,
283 rocker_driver_name, &wait);
284 if (err) {
285 dev_err(&pdev->dev, "cannot assign test irq\n");
286 return err;
287 }
288
289 rocker_wait_init(&wait);
290 rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
291
292 if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
293 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
294 err = -EIO;
295 goto free_irq;
296 }
297
298 err = rocker_dma_test(rocker, &wait);
299 if (err)
300 dev_err(&pdev->dev, "dma test failed\n");
301
302free_irq:
303 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
304 return err;
305}
306
307/******************************************
308 * DMA rings and descriptors manipulations
309 ******************************************/
310
311static u32 __pos_inc(u32 pos, size_t limit)
312{
313 return ++pos == limit ? 0 : pos;
314}
315
316static int rocker_desc_err(const struct rocker_desc_info *desc_info)
317{
318 int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
319
320 switch (err) {
321 case ROCKER_OK:
322 return 0;
323 case -ROCKER_ENOENT:
324 return -ENOENT;
325 case -ROCKER_ENXIO:
326 return -ENXIO;
327 case -ROCKER_ENOMEM:
328 return -ENOMEM;
329 case -ROCKER_EEXIST:
330 return -EEXIST;
331 case -ROCKER_EINVAL:
332 return -EINVAL;
333 case -ROCKER_EMSGSIZE:
334 return -EMSGSIZE;
335 case -ROCKER_ENOTSUP:
336 return -EOPNOTSUPP;
337 case -ROCKER_ENOBUFS:
338 return -ENOBUFS;
339 }
340
341 return -EINVAL;
342}
343
344static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
345{
346 desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
347}
348
349static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
350{
351 u32 comp_err = desc_info->desc->comp_err;
352
353 return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
354}
355
356static void *
357rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
358{
359 return (void *)(uintptr_t)desc_info->desc->cookie;
360}
361
362static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
363 void *ptr)
364{
365 desc_info->desc->cookie = (uintptr_t) ptr;
366}
367
368static struct rocker_desc_info *
369rocker_desc_head_get(const struct rocker_dma_ring_info *info)
370{
371 static struct rocker_desc_info *desc_info;
372 u32 head = __pos_inc(info->head, info->size);
373
374 desc_info = &info->desc_info[info->head];
375 if (head == info->tail)
376 return NULL; /* ring full */
377 desc_info->tlv_size = 0;
378 return desc_info;
379}
380
381static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
382{
383 desc_info->desc->buf_size = desc_info->data_size;
384 desc_info->desc->tlv_size = desc_info->tlv_size;
385}
386
387static void rocker_desc_head_set(const struct rocker *rocker,
388 struct rocker_dma_ring_info *info,
389 const struct rocker_desc_info *desc_info)
390{
391 u32 head = __pos_inc(info->head, info->size);
392
393 BUG_ON(head == info->tail);
394 rocker_desc_commit(desc_info);
395 info->head = head;
396 rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
397}
398
399static struct rocker_desc_info *
400rocker_desc_tail_get(struct rocker_dma_ring_info *info)
401{
402 static struct rocker_desc_info *desc_info;
403
404 if (info->tail == info->head)
405 return NULL; /* nothing to be done between head and tail */
406 desc_info = &info->desc_info[info->tail];
407 if (!rocker_desc_gen(desc_info))
408 return NULL; /* gen bit not set, desc is not ready yet */
409 info->tail = __pos_inc(info->tail, info->size);
410 desc_info->tlv_size = desc_info->desc->tlv_size;
411 return desc_info;
412}
413
414static void rocker_dma_ring_credits_set(const struct rocker *rocker,
415 const struct rocker_dma_ring_info *info,
416 u32 credits)
417{
418 if (credits)
419 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
420}
421
422static unsigned long rocker_dma_ring_size_fix(size_t size)
423{
424 return max(ROCKER_DMA_SIZE_MIN,
425 min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
426}
427
428static int rocker_dma_ring_create(const struct rocker *rocker,
429 unsigned int type,
430 size_t size,
431 struct rocker_dma_ring_info *info)
432{
433 int i;
434
435 BUG_ON(size != rocker_dma_ring_size_fix(size));
436 info->size = size;
437 info->type = type;
438 info->head = 0;
439 info->tail = 0;
440 info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
441 GFP_KERNEL);
442 if (!info->desc_info)
443 return -ENOMEM;
444
445 info->desc = pci_alloc_consistent(rocker->pdev,
446 info->size * sizeof(*info->desc),
447 &info->mapaddr);
448 if (!info->desc) {
449 kfree(info->desc_info);
450 return -ENOMEM;
451 }
452
453 for (i = 0; i < info->size; i++)
454 info->desc_info[i].desc = &info->desc[i];
455
456 rocker_write32(rocker, DMA_DESC_CTRL(info->type),
457 ROCKER_DMA_DESC_CTRL_RESET);
458 rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
459 rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
460
461 return 0;
462}
463
464static void rocker_dma_ring_destroy(const struct rocker *rocker,
465 const struct rocker_dma_ring_info *info)
466{
467 rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
468
469 pci_free_consistent(rocker->pdev,
470 info->size * sizeof(struct rocker_desc),
471 info->desc, info->mapaddr);
472 kfree(info->desc_info);
473}
474
475static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
476 struct rocker_dma_ring_info *info)
477{
478 int i;
479
480 BUG_ON(info->head || info->tail);
481
482 /* When ring is consumer, we need to advance head for each desc.
483 * That tells hw that the desc is ready to be used by it.
484 */
485 for (i = 0; i < info->size - 1; i++)
486 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
487 rocker_desc_commit(&info->desc_info[i]);
488}
489
490static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
491 const struct rocker_dma_ring_info *info,
492 int direction, size_t buf_size)
493{
494 struct pci_dev *pdev = rocker->pdev;
495 int i;
496 int err;
497
498 for (i = 0; i < info->size; i++) {
499 struct rocker_desc_info *desc_info = &info->desc_info[i];
500 struct rocker_desc *desc = &info->desc[i];
501 dma_addr_t dma_handle;
502 char *buf;
503
504 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
505 if (!buf) {
506 err = -ENOMEM;
507 goto rollback;
508 }
509
510 dma_handle = pci_map_single(pdev, buf, buf_size, direction);
511 if (pci_dma_mapping_error(pdev, dma_handle)) {
512 kfree(buf);
513 err = -EIO;
514 goto rollback;
515 }
516
517 desc_info->data = buf;
518 desc_info->data_size = buf_size;
519 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
520
521 desc->buf_addr = dma_handle;
522 desc->buf_size = buf_size;
523 }
524 return 0;
525
526rollback:
527 for (i--; i >= 0; i--) {
528 const struct rocker_desc_info *desc_info = &info->desc_info[i];
529
530 pci_unmap_single(pdev, 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 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
551 desc_info->data_size, direction);
552 kfree(desc_info->data);
553 }
554}
555
556static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
557{
558 struct rocker_wait *wait;
559
560 wait = rocker_wait_create();
561 if (!wait)
562 return -ENOMEM;
563 rocker_desc_cookie_ptr_set(desc_info, wait);
564 return 0;
565}
566
567static void
568rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
569{
570 struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
571
572 rocker_wait_destroy(wait);
573}
574
575static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
576{
577 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
578 int i;
579 int err;
580
581 for (i = 0; i < cmd_ring->size; i++) {
582 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
583 if (err)
584 goto rollback;
585 }
586 return 0;
587
588rollback:
589 for (i--; i >= 0; i--)
590 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
591 return err;
592}
593
594static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
595{
596 const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
597 int i;
598
599 for (i = 0; i < cmd_ring->size; i++)
600 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
601}
602
603static int rocker_dma_rings_init(struct rocker *rocker)
604{
605 const struct pci_dev *pdev = rocker->pdev;
606 int err;
607
608 err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
609 ROCKER_DMA_CMD_DEFAULT_SIZE,
610 &rocker->cmd_ring);
611 if (err) {
612 dev_err(&pdev->dev, "failed to create command dma ring\n");
613 return err;
614 }
615
616 spin_lock_init(&rocker->cmd_ring_lock);
617
618 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
619 PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
620 if (err) {
621 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
622 goto err_dma_cmd_ring_bufs_alloc;
623 }
624
625 err = rocker_dma_cmd_ring_waits_alloc(rocker);
626 if (err) {
627 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
628 goto err_dma_cmd_ring_waits_alloc;
629 }
630
631 err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
632 ROCKER_DMA_EVENT_DEFAULT_SIZE,
633 &rocker->event_ring);
634 if (err) {
635 dev_err(&pdev->dev, "failed to create event dma ring\n");
636 goto err_dma_event_ring_create;
637 }
638
639 err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
640 PCI_DMA_FROMDEVICE, PAGE_SIZE);
641 if (err) {
642 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
643 goto err_dma_event_ring_bufs_alloc;
644 }
645 rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
646 return 0;
647
648err_dma_event_ring_bufs_alloc:
649 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
650err_dma_event_ring_create:
651 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
652 PCI_DMA_BIDIRECTIONAL);
653err_dma_cmd_ring_waits_alloc:
654 rocker_dma_cmd_ring_waits_free(rocker);
655err_dma_cmd_ring_bufs_alloc:
656 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
657 return err;
658}
659
660static void rocker_dma_rings_fini(struct rocker *rocker)
661{
662 rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
663 PCI_DMA_BIDIRECTIONAL);
664 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
665 rocker_dma_cmd_ring_waits_free(rocker);
666 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
667 PCI_DMA_BIDIRECTIONAL);
668 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
669}
670
671static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
672 struct rocker_desc_info *desc_info,
673 struct sk_buff *skb, size_t buf_len)
674{
675 const struct rocker *rocker = rocker_port->rocker;
676 struct pci_dev *pdev = rocker->pdev;
677 dma_addr_t dma_handle;
678
679 dma_handle = pci_map_single(pdev, skb->data, buf_len,
680 PCI_DMA_FROMDEVICE);
681 if (pci_dma_mapping_error(pdev, dma_handle))
682 return -EIO;
683 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
684 goto tlv_put_failure;
685 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
686 goto tlv_put_failure;
687 return 0;
688
689tlv_put_failure:
690 pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
691 desc_info->tlv_size = 0;
692 return -EMSGSIZE;
693}
694
695static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
696{
697 return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
698}
699
700static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
701 struct rocker_desc_info *desc_info)
702{
703 struct net_device *dev = rocker_port->dev;
704 struct sk_buff *skb;
705 size_t buf_len = rocker_port_rx_buf_len(rocker_port);
706 int err;
707
708 /* Ensure that hw will see tlv_size zero in case of an error.
709 * That tells hw to use another descriptor.
710 */
711 rocker_desc_cookie_ptr_set(desc_info, NULL);
712 desc_info->tlv_size = 0;
713
714 skb = netdev_alloc_skb_ip_align(dev, buf_len);
715 if (!skb)
716 return -ENOMEM;
717 err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
718 if (err) {
719 dev_kfree_skb_any(skb);
720 return err;
721 }
722 rocker_desc_cookie_ptr_set(desc_info, skb);
723 return 0;
724}
725
726static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
727 const struct rocker_tlv **attrs)
728{
729 struct pci_dev *pdev = rocker->pdev;
730 dma_addr_t dma_handle;
731 size_t len;
732
733 if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
734 !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
735 return;
736 dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
737 len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
738 pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
739}
740
741static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
742 const struct rocker_desc_info *desc_info)
743{
744 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
745 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
746
747 if (!skb)
748 return;
749 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
750 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
751 dev_kfree_skb_any(skb);
752}
753
754static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
755{
756 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
757 const struct rocker *rocker = rocker_port->rocker;
758 int i;
759 int err;
760
761 for (i = 0; i < rx_ring->size; i++) {
762 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
763 &rx_ring->desc_info[i]);
764 if (err)
765 goto rollback;
766 }
767 return 0;
768
769rollback:
770 for (i--; i >= 0; i--)
771 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
772 return err;
773}
774
775static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
776{
777 const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
778 const struct rocker *rocker = rocker_port->rocker;
779 int i;
780
781 for (i = 0; i < rx_ring->size; i++)
782 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
783}
784
785static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
786{
787 struct rocker *rocker = rocker_port->rocker;
788 int err;
789
790 err = rocker_dma_ring_create(rocker,
791 ROCKER_DMA_TX(rocker_port->port_number),
792 ROCKER_DMA_TX_DEFAULT_SIZE,
793 &rocker_port->tx_ring);
794 if (err) {
795 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
796 return err;
797 }
798
799 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
800 PCI_DMA_TODEVICE,
801 ROCKER_DMA_TX_DESC_SIZE);
802 if (err) {
803 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
804 goto err_dma_tx_ring_bufs_alloc;
805 }
806
807 err = rocker_dma_ring_create(rocker,
808 ROCKER_DMA_RX(rocker_port->port_number),
809 ROCKER_DMA_RX_DEFAULT_SIZE,
810 &rocker_port->rx_ring);
811 if (err) {
812 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
813 goto err_dma_rx_ring_create;
814 }
815
816 err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
817 PCI_DMA_BIDIRECTIONAL,
818 ROCKER_DMA_RX_DESC_SIZE);
819 if (err) {
820 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
821 goto err_dma_rx_ring_bufs_alloc;
822 }
823
824 err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
825 if (err) {
826 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
827 goto err_dma_rx_ring_skbs_alloc;
828 }
829 rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
830
831 return 0;
832
833err_dma_rx_ring_skbs_alloc:
834 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
835 PCI_DMA_BIDIRECTIONAL);
836err_dma_rx_ring_bufs_alloc:
837 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
838err_dma_rx_ring_create:
839 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
840 PCI_DMA_TODEVICE);
841err_dma_tx_ring_bufs_alloc:
842 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
843 return err;
844}
845
846static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
847{
848 struct rocker *rocker = rocker_port->rocker;
849
850 rocker_dma_rx_ring_skbs_free(rocker_port);
851 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
852 PCI_DMA_BIDIRECTIONAL);
853 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
854 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
855 PCI_DMA_TODEVICE);
856 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
857}
858
859static void rocker_port_set_enable(const struct rocker_port *rocker_port,
860 bool enable)
861{
862 u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
863
864 if (enable)
865 val |= 1ULL << rocker_port->pport;
866 else
867 val &= ~(1ULL << rocker_port->pport);
868 rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
869}
870
871/********************************
872 * Interrupt handler and helpers
873 ********************************/
874
875static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
876{
877 struct rocker *rocker = dev_id;
878 const struct rocker_desc_info *desc_info;
879 struct rocker_wait *wait;
880 u32 credits = 0;
881
882 spin_lock(&rocker->cmd_ring_lock);
883 while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
884 wait = rocker_desc_cookie_ptr_get(desc_info);
885 if (wait->nowait) {
886 rocker_desc_gen_clear(desc_info);
887 } else {
888 rocker_wait_wake_up(wait);
889 }
890 credits++;
891 }
892 spin_unlock(&rocker->cmd_ring_lock);
893 rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
894
895 return IRQ_HANDLED;
896}
897
898static void rocker_port_link_up(const struct rocker_port *rocker_port)
899{
900 netif_carrier_on(rocker_port->dev);
901 netdev_info(rocker_port->dev, "Link is up\n");
902}
903
904static void rocker_port_link_down(const struct rocker_port *rocker_port)
905{
906 netif_carrier_off(rocker_port->dev);
907 netdev_info(rocker_port->dev, "Link is down\n");
908}
909
910static int rocker_event_link_change(const struct rocker *rocker,
911 const struct rocker_tlv *info)
912{
913 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
914 unsigned int port_number;
915 bool link_up;
916 struct rocker_port *rocker_port;
917
918 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
919 if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
920 !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
921 return -EIO;
922 port_number =
923 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
924 link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
925
926 if (port_number >= rocker->port_count)
927 return -EINVAL;
928
929 rocker_port = rocker->ports[port_number];
930 if (netif_carrier_ok(rocker_port->dev) != link_up) {
931 if (link_up)
932 rocker_port_link_up(rocker_port);
933 else
934 rocker_port_link_down(rocker_port);
935 }
936
937 return 0;
938}
939
940static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
941 const unsigned char *addr,
942 __be16 vlan_id);
943
944static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
945 const struct rocker_tlv *info)
946{
947 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
948 unsigned int port_number;
949 struct rocker_port *rocker_port;
950 const unsigned char *addr;
951 __be16 vlan_id;
952
953 rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
954 if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
955 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
956 !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
957 return -EIO;
958 port_number =
959 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
960 addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
961 vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
962
963 if (port_number >= rocker->port_count)
964 return -EINVAL;
965
966 rocker_port = rocker->ports[port_number];
967 return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
968}
969
970static int rocker_event_process(const struct rocker *rocker,
971 const struct rocker_desc_info *desc_info)
972{
973 const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
974 const struct rocker_tlv *info;
975 u16 type;
976
977 rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
978 if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
979 !attrs[ROCKER_TLV_EVENT_INFO])
980 return -EIO;
981
982 type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
983 info = attrs[ROCKER_TLV_EVENT_INFO];
984
985 switch (type) {
986 case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
987 return rocker_event_link_change(rocker, info);
988 case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
989 return rocker_event_mac_vlan_seen(rocker, info);
990 }
991
992 return -EOPNOTSUPP;
993}
994
995static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
996{
997 struct rocker *rocker = dev_id;
998 const struct pci_dev *pdev = rocker->pdev;
999 const struct rocker_desc_info *desc_info;
1000 u32 credits = 0;
1001 int err;
1002
1003 while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1004 err = rocker_desc_err(desc_info);
1005 if (err) {
1006 dev_err(&pdev->dev, "event desc received with err %d\n",
1007 err);
1008 } else {
1009 err = rocker_event_process(rocker, desc_info);
1010 if (err)
1011 dev_err(&pdev->dev, "event processing failed with err %d\n",
1012 err);
1013 }
1014 rocker_desc_gen_clear(desc_info);
1015 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1016 credits++;
1017 }
1018 rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1019
1020 return IRQ_HANDLED;
1021}
1022
1023static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1024{
1025 struct rocker_port *rocker_port = dev_id;
1026
1027 napi_schedule(&rocker_port->napi_tx);
1028 return IRQ_HANDLED;
1029}
1030
1031static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1032{
1033 struct rocker_port *rocker_port = dev_id;
1034
1035 napi_schedule(&rocker_port->napi_rx);
1036 return IRQ_HANDLED;
1037}
1038
1039/********************
1040 * Command interface
1041 ********************/
1042
1043int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1044 rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1045 rocker_cmd_proc_cb_t process, void *process_priv)
1046{
1047 struct rocker *rocker = rocker_port->rocker;
1048 struct rocker_desc_info *desc_info;
1049 struct rocker_wait *wait;
1050 unsigned long lock_flags;
1051 int err;
1052
1053 spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1054
1055 desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1056 if (!desc_info) {
1057 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1058 return -EAGAIN;
1059 }
1060
1061 wait = rocker_desc_cookie_ptr_get(desc_info);
1062 rocker_wait_init(wait);
1063 wait->nowait = nowait;
1064
1065 err = prepare(rocker_port, desc_info, prepare_priv);
1066 if (err) {
1067 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1068 return err;
1069 }
1070
1071 rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1072
1073 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1074
1075 if (nowait)
1076 return 0;
1077
1078 if (!rocker_wait_event_timeout(wait, HZ / 10))
1079 return -EIO;
1080
1081 err = rocker_desc_err(desc_info);
1082 if (err)
1083 return err;
1084
1085 if (process)
1086 err = process(rocker_port, desc_info, process_priv);
1087
1088 rocker_desc_gen_clear(desc_info);
1089 return err;
1090}
1091
1092static int
1093rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1094 struct rocker_desc_info *desc_info,
1095 void *priv)
1096{
1097 struct rocker_tlv *cmd_info;
1098
1099 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1100 ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1101 return -EMSGSIZE;
1102 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1103 if (!cmd_info)
1104 return -EMSGSIZE;
1105 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1106 rocker_port->pport))
1107 return -EMSGSIZE;
1108 rocker_tlv_nest_end(desc_info, cmd_info);
1109 return 0;
1110}
1111
1112static int
1113rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1114 const struct rocker_desc_info *desc_info,
1115 void *priv)
1116{
1117 struct ethtool_cmd *ecmd = priv;
1118 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1119 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1120 u32 speed;
1121 u8 duplex;
1122 u8 autoneg;
1123
1124 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1125 if (!attrs[ROCKER_TLV_CMD_INFO])
1126 return -EIO;
1127
1128 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1129 attrs[ROCKER_TLV_CMD_INFO]);
1130 if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1131 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1132 !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1133 return -EIO;
1134
1135 speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1136 duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1137 autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1138
1139 ecmd->transceiver = XCVR_INTERNAL;
1140 ecmd->supported = SUPPORTED_TP;
1141 ecmd->phy_address = 0xff;
1142 ecmd->port = PORT_TP;
1143 ethtool_cmd_speed_set(ecmd, speed);
1144 ecmd->duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1145 ecmd->autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1146
1147 return 0;
1148}
1149
1150static int
1151rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1152 const struct rocker_desc_info *desc_info,
1153 void *priv)
1154{
1155 unsigned char *macaddr = priv;
1156 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1157 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1158 const struct rocker_tlv *attr;
1159
1160 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1161 if (!attrs[ROCKER_TLV_CMD_INFO])
1162 return -EIO;
1163
1164 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1165 attrs[ROCKER_TLV_CMD_INFO]);
1166 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1167 if (!attr)
1168 return -EIO;
1169
1170 if (rocker_tlv_len(attr) != ETH_ALEN)
1171 return -EINVAL;
1172
1173 ether_addr_copy(macaddr, rocker_tlv_data(attr));
1174 return 0;
1175}
1176
1177static int
1178rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1179 const struct rocker_desc_info *desc_info,
1180 void *priv)
1181{
1182 u8 *p_mode = priv;
1183 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1184 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1185 const struct rocker_tlv *attr;
1186
1187 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1188 if (!attrs[ROCKER_TLV_CMD_INFO])
1189 return -EIO;
1190
1191 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1192 attrs[ROCKER_TLV_CMD_INFO]);
1193 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1194 if (!attr)
1195 return -EIO;
1196
1197 *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1198 return 0;
1199}
1200
1201struct port_name {
1202 char *buf;
1203 size_t len;
1204};
1205
1206static int
1207rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1208 const struct rocker_desc_info *desc_info,
1209 void *priv)
1210{
1211 const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1212 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1213 struct port_name *name = priv;
1214 const struct rocker_tlv *attr;
1215 size_t i, j, len;
1216 const char *str;
1217
1218 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1219 if (!attrs[ROCKER_TLV_CMD_INFO])
1220 return -EIO;
1221
1222 rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1223 attrs[ROCKER_TLV_CMD_INFO]);
1224 attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1225 if (!attr)
1226 return -EIO;
1227
1228 len = min_t(size_t, rocker_tlv_len(attr), name->len);
1229 str = rocker_tlv_data(attr);
1230
1231 /* make sure name only contains alphanumeric characters */
1232 for (i = j = 0; i < len; ++i) {
1233 if (isalnum(str[i])) {
1234 name->buf[j] = str[i];
1235 j++;
1236 }
1237 }
1238
1239 if (j == 0)
1240 return -EIO;
1241
1242 name->buf[j] = '\0';
1243
1244 return 0;
1245}
1246
1247static int
1248rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1249 struct rocker_desc_info *desc_info,
1250 void *priv)
1251{
1252 struct ethtool_cmd *ecmd = priv;
1253 struct rocker_tlv *cmd_info;
1254
1255 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1256 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1257 return -EMSGSIZE;
1258 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1259 if (!cmd_info)
1260 return -EMSGSIZE;
1261 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1262 rocker_port->pport))
1263 return -EMSGSIZE;
1264 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1265 ethtool_cmd_speed(ecmd)))
1266 return -EMSGSIZE;
1267 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1268 ecmd->duplex))
1269 return -EMSGSIZE;
1270 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1271 ecmd->autoneg))
1272 return -EMSGSIZE;
1273 rocker_tlv_nest_end(desc_info, cmd_info);
1274 return 0;
1275}
1276
1277static int
1278rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1279 struct rocker_desc_info *desc_info,
1280 void *priv)
1281{
1282 const unsigned char *macaddr = priv;
1283 struct rocker_tlv *cmd_info;
1284
1285 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1286 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1287 return -EMSGSIZE;
1288 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1289 if (!cmd_info)
1290 return -EMSGSIZE;
1291 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1292 rocker_port->pport))
1293 return -EMSGSIZE;
1294 if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1295 ETH_ALEN, macaddr))
1296 return -EMSGSIZE;
1297 rocker_tlv_nest_end(desc_info, cmd_info);
1298 return 0;
1299}
1300
1301static int
1302rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1303 struct rocker_desc_info *desc_info,
1304 void *priv)
1305{
1306 int mtu = *(int *)priv;
1307 struct rocker_tlv *cmd_info;
1308
1309 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1310 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1311 return -EMSGSIZE;
1312 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1313 if (!cmd_info)
1314 return -EMSGSIZE;
1315 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1316 rocker_port->pport))
1317 return -EMSGSIZE;
1318 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1319 mtu))
1320 return -EMSGSIZE;
1321 rocker_tlv_nest_end(desc_info, cmd_info);
1322 return 0;
1323}
1324
1325static int
1326rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1327 struct rocker_desc_info *desc_info,
1328 void *priv)
1329{
1330 bool learning = *(bool *)priv;
1331 struct rocker_tlv *cmd_info;
1332
1333 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1334 ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1335 return -EMSGSIZE;
1336 cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1337 if (!cmd_info)
1338 return -EMSGSIZE;
1339 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1340 rocker_port->pport))
1341 return -EMSGSIZE;
1342 if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1343 learning))
1344 return -EMSGSIZE;
1345 rocker_tlv_nest_end(desc_info, cmd_info);
1346 return 0;
1347}
1348
1349static int rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1350 struct ethtool_cmd *ecmd)
1351{
1352 return rocker_cmd_exec(rocker_port, false,
1353 rocker_cmd_get_port_settings_prep, NULL,
1354 rocker_cmd_get_port_settings_ethtool_proc,
1355 ecmd);
1356}
1357
1358static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1359 unsigned char *macaddr)
1360{
1361 return rocker_cmd_exec(rocker_port, false,
1362 rocker_cmd_get_port_settings_prep, NULL,
1363 rocker_cmd_get_port_settings_macaddr_proc,
1364 macaddr);
1365}
1366
1367static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1368 u8 *p_mode)
1369{
1370 return rocker_cmd_exec(rocker_port, false,
1371 rocker_cmd_get_port_settings_prep, NULL,
1372 rocker_cmd_get_port_settings_mode_proc, p_mode);
1373}
1374
1375static int rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1376 struct ethtool_cmd *ecmd)
1377{
1378 return rocker_cmd_exec(rocker_port, false,
1379 rocker_cmd_set_port_settings_ethtool_prep,
1380 ecmd, NULL, NULL);
1381}
1382
1383static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1384 unsigned char *macaddr)
1385{
1386 return rocker_cmd_exec(rocker_port, false,
1387 rocker_cmd_set_port_settings_macaddr_prep,
1388 macaddr, NULL, NULL);
1389}
1390
1391static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1392 int mtu)
1393{
1394 return rocker_cmd_exec(rocker_port, false,
1395 rocker_cmd_set_port_settings_mtu_prep,
1396 &mtu, NULL, NULL);
1397}
1398
1399int rocker_port_set_learning(struct rocker_port *rocker_port,
1400 bool learning)
1401{
1402 return rocker_cmd_exec(rocker_port, false,
1403 rocker_cmd_set_port_learning_prep,
1404 &learning, NULL, NULL);
1405}
1406
1407/**********************
1408 * Worlds manipulation
1409 **********************/
1410
1411static struct rocker_world_ops *rocker_world_ops[] = {
1412 &rocker_ofdpa_ops,
1413};
1414
1415#define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1416
1417static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1418{
1419 int i;
1420
1421 for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1422 if (rocker_world_ops[i]->mode == mode)
1423 return rocker_world_ops[i];
1424 return NULL;
1425}
1426
1427static int rocker_world_init(struct rocker *rocker, u8 mode)
1428{
1429 struct rocker_world_ops *wops;
1430 int err;
1431
1432 wops = rocker_world_ops_find(mode);
1433 if (!wops) {
1434 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1435 mode);
1436 return -EINVAL;
1437 }
1438 rocker->wops = wops;
1439 rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1440 if (!rocker->wpriv)
1441 return -ENOMEM;
1442 if (!wops->init)
1443 return 0;
1444 err = wops->init(rocker);
1445 if (err)
1446 kfree(rocker->wpriv);
1447 return err;
1448}
1449
1450static void rocker_world_fini(struct rocker *rocker)
1451{
1452 struct rocker_world_ops *wops = rocker->wops;
1453
1454 if (!wops || !wops->fini)
1455 return;
1456 wops->fini(rocker);
1457 kfree(rocker->wpriv);
1458}
1459
1460static int rocker_world_check_init(struct rocker_port *rocker_port)
1461{
1462 struct rocker *rocker = rocker_port->rocker;
1463 u8 mode;
1464 int err;
1465
1466 err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1467 if (err) {
1468 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1469 return err;
1470 }
1471 if (rocker->wops) {
1472 if (rocker->wops->mode != mode) {
1473 dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1474 return err;
1475 }
1476 return 0;
1477 }
1478 return rocker_world_init(rocker, mode);
1479}
1480
1481static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1482{
1483 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1484 int err;
1485
1486 rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1487 if (!rocker_port->wpriv)
1488 return -ENOMEM;
1489 if (!wops->port_pre_init)
1490 return 0;
1491 err = wops->port_pre_init(rocker_port);
1492 if (err)
1493 kfree(rocker_port->wpriv);
1494 return 0;
1495}
1496
1497static int rocker_world_port_init(struct rocker_port *rocker_port)
1498{
1499 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1500
1501 if (!wops->port_init)
1502 return 0;
1503 return wops->port_init(rocker_port);
1504}
1505
1506static void rocker_world_port_fini(struct rocker_port *rocker_port)
1507{
1508 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510 if (!wops->port_fini)
1511 return;
1512 wops->port_fini(rocker_port);
1513}
1514
1515static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1516{
1517 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519 if (!wops->port_post_fini)
1520 return;
1521 wops->port_post_fini(rocker_port);
1522 kfree(rocker_port->wpriv);
1523}
1524
1525static int rocker_world_port_open(struct rocker_port *rocker_port)
1526{
1527 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1528
1529 if (!wops->port_open)
1530 return 0;
1531 return wops->port_open(rocker_port);
1532}
1533
1534static void rocker_world_port_stop(struct rocker_port *rocker_port)
1535{
1536 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538 if (!wops->port_stop)
1539 return;
1540 wops->port_stop(rocker_port);
1541}
1542
1543static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1544 u8 state,
1545 struct switchdev_trans *trans)
1546{
1547 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1548
1549 if (!wops->port_attr_stp_state_set)
1550 return -EOPNOTSUPP;
1551 return wops->port_attr_stp_state_set(rocker_port, state, trans);
1552}
1553
1554static int
1555rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1556 unsigned long brport_flags,
1557 struct switchdev_trans *trans)
1558{
1559 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1560
1561 if (!wops->port_attr_bridge_flags_set)
1562 return -EOPNOTSUPP;
1563 return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1564 trans);
1565}
1566
1567static int
1568rocker_world_port_attr_bridge_flags_get(const struct rocker_port *rocker_port,
1569 unsigned long *p_brport_flags)
1570{
1571 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1572
1573 if (!wops->port_attr_bridge_flags_get)
1574 return -EOPNOTSUPP;
1575 return wops->port_attr_bridge_flags_get(rocker_port, p_brport_flags);
1576}
1577
1578static int
1579rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1580 u32 ageing_time,
1581 struct switchdev_trans *trans)
1582
1583{
1584 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1585
1586 if (!wops->port_attr_bridge_ageing_time_set)
1587 return -EOPNOTSUPP;
1588 return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1589 trans);
1590}
1591
1592static int
1593rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1594 const struct switchdev_obj_port_vlan *vlan,
1595 struct switchdev_trans *trans)
1596{
1597 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1598
1599 if (!wops->port_obj_vlan_add)
1600 return -EOPNOTSUPP;
1601 return wops->port_obj_vlan_add(rocker_port, vlan, trans);
1602}
1603
1604static int
1605rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1606 const struct switchdev_obj_port_vlan *vlan)
1607{
1608 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1609
1610 if (!wops->port_obj_vlan_del)
1611 return -EOPNOTSUPP;
1612 return wops->port_obj_vlan_del(rocker_port, vlan);
1613}
1614
1615static int
1616rocker_world_port_obj_vlan_dump(const struct rocker_port *rocker_port,
1617 struct switchdev_obj_port_vlan *vlan,
1618 switchdev_obj_dump_cb_t *cb)
1619{
1620 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1621
1622 if (!wops->port_obj_vlan_dump)
1623 return -EOPNOTSUPP;
1624 return wops->port_obj_vlan_dump(rocker_port, vlan, cb);
1625}
1626
1627static int
1628rocker_world_port_obj_fib4_add(struct rocker_port *rocker_port,
1629 const struct switchdev_obj_ipv4_fib *fib4,
1630 struct switchdev_trans *trans)
1631{
1632 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1633
1634 if (!wops->port_obj_fib4_add)
1635 return -EOPNOTSUPP;
1636 return wops->port_obj_fib4_add(rocker_port, fib4, trans);
1637}
1638
1639static int
1640rocker_world_port_obj_fib4_del(struct rocker_port *rocker_port,
1641 const struct switchdev_obj_ipv4_fib *fib4)
1642{
1643 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1644
1645 if (!wops->port_obj_fib4_del)
1646 return -EOPNOTSUPP;
1647 return wops->port_obj_fib4_del(rocker_port, fib4);
1648}
1649
1650static int
1651rocker_world_port_obj_fdb_add(struct rocker_port *rocker_port,
1652 const struct switchdev_obj_port_fdb *fdb,
1653 struct switchdev_trans *trans)
1654{
1655 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1656
1657 if (!wops->port_obj_fdb_add)
1658 return -EOPNOTSUPP;
1659 return wops->port_obj_fdb_add(rocker_port, fdb, trans);
1660}
1661
1662static int
1663rocker_world_port_obj_fdb_del(struct rocker_port *rocker_port,
1664 const struct switchdev_obj_port_fdb *fdb)
1665{
1666 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1667
1668 if (!wops->port_obj_fdb_del)
1669 return -EOPNOTSUPP;
1670 return wops->port_obj_fdb_del(rocker_port, fdb);
1671}
1672
1673static int
1674rocker_world_port_obj_fdb_dump(const struct rocker_port *rocker_port,
1675 struct switchdev_obj_port_fdb *fdb,
1676 switchdev_obj_dump_cb_t *cb)
1677{
1678 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1679
1680 if (!wops->port_obj_fdb_dump)
1681 return -EOPNOTSUPP;
1682 return wops->port_obj_fdb_dump(rocker_port, fdb, cb);
1683}
1684
1685static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1686 struct net_device *master)
1687{
1688 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1689
1690 if (!wops->port_master_linked)
1691 return -EOPNOTSUPP;
1692 return wops->port_master_linked(rocker_port, master);
1693}
1694
1695static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1696 struct net_device *master)
1697{
1698 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1699
1700 if (!wops->port_master_unlinked)
1701 return -EOPNOTSUPP;
1702 return wops->port_master_unlinked(rocker_port, master);
1703}
1704
1705static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1706 struct neighbour *n)
1707{
1708 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1709
1710 if (!wops->port_neigh_update)
1711 return -EOPNOTSUPP;
1712 return wops->port_neigh_update(rocker_port, n);
1713}
1714
1715static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1716 struct neighbour *n)
1717{
1718 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1719
1720 if (!wops->port_neigh_destroy)
1721 return -EOPNOTSUPP;
1722 return wops->port_neigh_destroy(rocker_port, n);
1723}
1724
1725static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1726 const unsigned char *addr,
1727 __be16 vlan_id)
1728{
1729 struct rocker_world_ops *wops = rocker_port->rocker->wops;
1730
1731 if (!wops->port_ev_mac_vlan_seen)
1732 return -EOPNOTSUPP;
1733 return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1734}
1735
1736/*****************
1737 * Net device ops
1738 *****************/
1739
1740static int rocker_port_open(struct net_device *dev)
1741{
1742 struct rocker_port *rocker_port = netdev_priv(dev);
1743 int err;
1744
1745 err = rocker_port_dma_rings_init(rocker_port);
1746 if (err)
1747 return err;
1748
1749 err = request_irq(rocker_msix_tx_vector(rocker_port),
1750 rocker_tx_irq_handler, 0,
1751 rocker_driver_name, rocker_port);
1752 if (err) {
1753 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1754 goto err_request_tx_irq;
1755 }
1756
1757 err = request_irq(rocker_msix_rx_vector(rocker_port),
1758 rocker_rx_irq_handler, 0,
1759 rocker_driver_name, rocker_port);
1760 if (err) {
1761 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1762 goto err_request_rx_irq;
1763 }
1764
1765 err = rocker_world_port_open(rocker_port);
1766 if (err) {
1767 netdev_err(rocker_port->dev, "cannot open port in world\n");
1768 goto err_world_port_open;
1769 }
1770
1771 napi_enable(&rocker_port->napi_tx);
1772 napi_enable(&rocker_port->napi_rx);
1773 if (!dev->proto_down)
1774 rocker_port_set_enable(rocker_port, true);
1775 netif_start_queue(dev);
1776 return 0;
1777
1778err_world_port_open:
1779 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1780err_request_rx_irq:
1781 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1782err_request_tx_irq:
1783 rocker_port_dma_rings_fini(rocker_port);
1784 return err;
1785}
1786
1787static int rocker_port_stop(struct net_device *dev)
1788{
1789 struct rocker_port *rocker_port = netdev_priv(dev);
1790
1791 netif_stop_queue(dev);
1792 rocker_port_set_enable(rocker_port, false);
1793 napi_disable(&rocker_port->napi_rx);
1794 napi_disable(&rocker_port->napi_tx);
1795 rocker_world_port_stop(rocker_port);
1796 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1797 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1798 rocker_port_dma_rings_fini(rocker_port);
1799
1800 return 0;
1801}
1802
1803static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1804 const struct rocker_desc_info *desc_info)
1805{
1806 const struct rocker *rocker = rocker_port->rocker;
1807 struct pci_dev *pdev = rocker->pdev;
1808 const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1809 struct rocker_tlv *attr;
1810 int rem;
1811
1812 rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1813 if (!attrs[ROCKER_TLV_TX_FRAGS])
1814 return;
1815 rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1816 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1817 dma_addr_t dma_handle;
1818 size_t len;
1819
1820 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1821 continue;
1822 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1823 attr);
1824 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1825 !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1826 continue;
1827 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1828 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1829 pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
1830 }
1831}
1832
1833static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1834 struct rocker_desc_info *desc_info,
1835 char *buf, size_t buf_len)
1836{
1837 const struct rocker *rocker = rocker_port->rocker;
1838 struct pci_dev *pdev = rocker->pdev;
1839 dma_addr_t dma_handle;
1840 struct rocker_tlv *frag;
1841
1842 dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
1843 if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
1844 if (net_ratelimit())
1845 netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1846 return -EIO;
1847 }
1848 frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1849 if (!frag)
1850 goto unmap_frag;
1851 if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1852 dma_handle))
1853 goto nest_cancel;
1854 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1855 buf_len))
1856 goto nest_cancel;
1857 rocker_tlv_nest_end(desc_info, frag);
1858 return 0;
1859
1860nest_cancel:
1861 rocker_tlv_nest_cancel(desc_info, frag);
1862unmap_frag:
1863 pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1864 return -EMSGSIZE;
1865}
1866
1867static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1868{
1869 struct rocker_port *rocker_port = netdev_priv(dev);
1870 struct rocker *rocker = rocker_port->rocker;
1871 struct rocker_desc_info *desc_info;
1872 struct rocker_tlv *frags;
1873 int i;
1874 int err;
1875
1876 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1877 if (unlikely(!desc_info)) {
1878 if (net_ratelimit())
1879 netdev_err(dev, "tx ring full when queue awake\n");
1880 return NETDEV_TX_BUSY;
1881 }
1882
1883 rocker_desc_cookie_ptr_set(desc_info, skb);
1884
1885 frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1886 if (!frags)
1887 goto out;
1888 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1889 skb->data, skb_headlen(skb));
1890 if (err)
1891 goto nest_cancel;
1892 if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1893 err = skb_linearize(skb);
1894 if (err)
1895 goto unmap_frags;
1896 }
1897
1898 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1899 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1900
1901 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1902 skb_frag_address(frag),
1903 skb_frag_size(frag));
1904 if (err)
1905 goto unmap_frags;
1906 }
1907 rocker_tlv_nest_end(desc_info, frags);
1908
1909 rocker_desc_gen_clear(desc_info);
1910 rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1911
1912 desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1913 if (!desc_info)
1914 netif_stop_queue(dev);
1915
1916 return NETDEV_TX_OK;
1917
1918unmap_frags:
1919 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1920nest_cancel:
1921 rocker_tlv_nest_cancel(desc_info, frags);
1922out:
1923 dev_kfree_skb(skb);
1924 dev->stats.tx_dropped++;
1925
1926 return NETDEV_TX_OK;
1927}
1928
1929static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1930{
1931 struct sockaddr *addr = p;
1932 struct rocker_port *rocker_port = netdev_priv(dev);
1933 int err;
1934
1935 if (!is_valid_ether_addr(addr->sa_data))
1936 return -EADDRNOTAVAIL;
1937
1938 err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1939 if (err)
1940 return err;
1941 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1942 return 0;
1943}
1944
1945static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1946{
1947 struct rocker_port *rocker_port = netdev_priv(dev);
1948 int running = netif_running(dev);
1949 int err;
1950
1951#define ROCKER_PORT_MIN_MTU 68
1952#define ROCKER_PORT_MAX_MTU 9000
1953
1954 if (new_mtu < ROCKER_PORT_MIN_MTU || new_mtu > ROCKER_PORT_MAX_MTU)
1955 return -EINVAL;
1956
1957 if (running)
1958 rocker_port_stop(dev);
1959
1960 netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1961 dev->mtu = new_mtu;
1962
1963 err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1964 if (err)
1965 return err;
1966
1967 if (running)
1968 err = rocker_port_open(dev);
1969
1970 return err;
1971}
1972
1973static int rocker_port_get_phys_port_name(struct net_device *dev,
1974 char *buf, size_t len)
1975{
1976 struct rocker_port *rocker_port = netdev_priv(dev);
1977 struct port_name name = { .buf = buf, .len = len };
1978 int err;
1979
1980 err = rocker_cmd_exec(rocker_port, false,
1981 rocker_cmd_get_port_settings_prep, NULL,
1982 rocker_cmd_get_port_settings_phys_name_proc,
1983 &name);
1984
1985 return err ? -EOPNOTSUPP : 0;
1986}
1987
1988static int rocker_port_change_proto_down(struct net_device *dev,
1989 bool proto_down)
1990{
1991 struct rocker_port *rocker_port = netdev_priv(dev);
1992
1993 if (rocker_port->dev->flags & IFF_UP)
1994 rocker_port_set_enable(rocker_port, !proto_down);
1995 rocker_port->dev->proto_down = proto_down;
1996 return 0;
1997}
1998
1999static void rocker_port_neigh_destroy(struct neighbour *n)
2000{
2001 struct rocker_port *rocker_port = netdev_priv(n->dev);
2002 int err;
2003
2004 err = rocker_world_port_neigh_destroy(rocker_port, n);
2005 if (err)
2006 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2007 err);
2008}
2009
2010static const struct net_device_ops rocker_port_netdev_ops = {
2011 .ndo_open = rocker_port_open,
2012 .ndo_stop = rocker_port_stop,
2013 .ndo_start_xmit = rocker_port_xmit,
2014 .ndo_set_mac_address = rocker_port_set_mac_address,
2015 .ndo_change_mtu = rocker_port_change_mtu,
2016 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2017 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2018 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2019 .ndo_fdb_add = switchdev_port_fdb_add,
2020 .ndo_fdb_del = switchdev_port_fdb_del,
2021 .ndo_fdb_dump = switchdev_port_fdb_dump,
2022 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2023 .ndo_change_proto_down = rocker_port_change_proto_down,
2024 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2025};
2026
2027/********************
2028 * swdev interface
2029 ********************/
2030
2031static int rocker_port_attr_get(struct net_device *dev,
2032 struct switchdev_attr *attr)
2033{
2034 const struct rocker_port *rocker_port = netdev_priv(dev);
2035 const struct rocker *rocker = rocker_port->rocker;
2036 int err = 0;
2037
2038 switch (attr->id) {
2039 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
2040 attr->u.ppid.id_len = sizeof(rocker->hw.id);
2041 memcpy(&attr->u.ppid.id, &rocker->hw.id, attr->u.ppid.id_len);
2042 break;
2043 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2044 err = rocker_world_port_attr_bridge_flags_get(rocker_port,
2045 &attr->u.brport_flags);
2046 break;
2047 default:
2048 return -EOPNOTSUPP;
2049 }
2050
2051 return err;
2052}
2053
2054static int rocker_port_attr_set(struct net_device *dev,
2055 const struct switchdev_attr *attr,
2056 struct switchdev_trans *trans)
2057{
2058 struct rocker_port *rocker_port = netdev_priv(dev);
2059 int err = 0;
2060
2061 switch (attr->id) {
2062 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2063 err = rocker_world_port_attr_stp_state_set(rocker_port,
2064 attr->u.stp_state,
2065 trans);
2066 break;
2067 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2068 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2069 attr->u.brport_flags,
2070 trans);
2071 break;
2072 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2073 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2074 attr->u.ageing_time,
2075 trans);
2076 break;
2077 default:
2078 err = -EOPNOTSUPP;
2079 break;
2080 }
2081
2082 return err;
2083}
2084
2085static int rocker_port_obj_add(struct net_device *dev,
2086 const struct switchdev_obj *obj,
2087 struct switchdev_trans *trans)
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_add(rocker_port,
2095 SWITCHDEV_OBJ_PORT_VLAN(obj),
2096 trans);
2097 break;
2098 case SWITCHDEV_OBJ_ID_IPV4_FIB:
2099 err = rocker_world_port_obj_fib4_add(rocker_port,
2100 SWITCHDEV_OBJ_IPV4_FIB(obj),
2101 trans);
2102 break;
2103 case SWITCHDEV_OBJ_ID_PORT_FDB:
2104 err = rocker_world_port_obj_fdb_add(rocker_port,
2105 SWITCHDEV_OBJ_PORT_FDB(obj),
2106 trans);
2107 break;
2108 default:
2109 err = -EOPNOTSUPP;
2110 break;
2111 }
2112
2113 return err;
2114}
2115
2116static int rocker_port_obj_del(struct net_device *dev,
2117 const struct switchdev_obj *obj)
2118{
2119 struct rocker_port *rocker_port = netdev_priv(dev);
2120 int err = 0;
2121
2122 switch (obj->id) {
2123 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2124 err = rocker_world_port_obj_vlan_del(rocker_port,
2125 SWITCHDEV_OBJ_PORT_VLAN(obj));
2126 break;
2127 case SWITCHDEV_OBJ_ID_IPV4_FIB:
2128 err = rocker_world_port_obj_fib4_del(rocker_port,
2129 SWITCHDEV_OBJ_IPV4_FIB(obj));
2130 break;
2131 case SWITCHDEV_OBJ_ID_PORT_FDB:
2132 err = rocker_world_port_obj_fdb_del(rocker_port,
2133 SWITCHDEV_OBJ_PORT_FDB(obj));
2134 break;
2135 default:
2136 err = -EOPNOTSUPP;
2137 break;
2138 }
2139
2140 return err;
2141}
2142
2143static int rocker_port_obj_dump(struct net_device *dev,
2144 struct switchdev_obj *obj,
2145 switchdev_obj_dump_cb_t *cb)
2146{
2147 const struct rocker_port *rocker_port = netdev_priv(dev);
2148 int err = 0;
2149
2150 switch (obj->id) {
2151 case SWITCHDEV_OBJ_ID_PORT_FDB:
2152 err = rocker_world_port_obj_fdb_dump(rocker_port,
2153 SWITCHDEV_OBJ_PORT_FDB(obj),
2154 cb);
2155 break;
2156 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2157 err = rocker_world_port_obj_vlan_dump(rocker_port,
2158 SWITCHDEV_OBJ_PORT_VLAN(obj),
2159 cb);
2160 break;
2161 default:
2162 err = -EOPNOTSUPP;
2163 break;
2164 }
2165
2166 return err;
2167}
2168
2169static const struct switchdev_ops rocker_port_switchdev_ops = {
2170 .switchdev_port_attr_get = rocker_port_attr_get,
2171 .switchdev_port_attr_set = rocker_port_attr_set,
2172 .switchdev_port_obj_add = rocker_port_obj_add,
2173 .switchdev_port_obj_del = rocker_port_obj_del,
2174 .switchdev_port_obj_dump = rocker_port_obj_dump,
2175};
2176
2177/********************
2178 * ethtool interface
2179 ********************/
2180
2181static int rocker_port_get_settings(struct net_device *dev,
2182 struct ethtool_cmd *ecmd)
2183{
2184 struct rocker_port *rocker_port = netdev_priv(dev);
2185
2186 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2187}
2188
2189static int rocker_port_set_settings(struct net_device *dev,
2190 struct ethtool_cmd *ecmd)
2191{
2192 struct rocker_port *rocker_port = netdev_priv(dev);
2193
2194 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2195}
2196
2197static void rocker_port_get_drvinfo(struct net_device *dev,
2198 struct ethtool_drvinfo *drvinfo)
2199{
2200 strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2201 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2202}
2203
2204static struct rocker_port_stats {
2205 char str[ETH_GSTRING_LEN];
2206 int type;
2207} rocker_port_stats[] = {
2208 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2209 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2210 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2211 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2212
2213 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2214 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2215 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2216 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2217};
2218
2219#define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2220
2221static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2222 u8 *data)
2223{
2224 u8 *p = data;
2225 int i;
2226
2227 switch (stringset) {
2228 case ETH_SS_STATS:
2229 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2230 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2231 p += ETH_GSTRING_LEN;
2232 }
2233 break;
2234 }
2235}
2236
2237static int
2238rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2239 struct rocker_desc_info *desc_info,
2240 void *priv)
2241{
2242 struct rocker_tlv *cmd_stats;
2243
2244 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2245 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2246 return -EMSGSIZE;
2247
2248 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2249 if (!cmd_stats)
2250 return -EMSGSIZE;
2251
2252 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2253 rocker_port->pport))
2254 return -EMSGSIZE;
2255
2256 rocker_tlv_nest_end(desc_info, cmd_stats);
2257
2258 return 0;
2259}
2260
2261static int
2262rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2263 const struct rocker_desc_info *desc_info,
2264 void *priv)
2265{
2266 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2267 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2268 const struct rocker_tlv *pattr;
2269 u32 pport;
2270 u64 *data = priv;
2271 int i;
2272
2273 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2274
2275 if (!attrs[ROCKER_TLV_CMD_INFO])
2276 return -EIO;
2277
2278 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2279 attrs[ROCKER_TLV_CMD_INFO]);
2280
2281 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2282 return -EIO;
2283
2284 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2285 if (pport != rocker_port->pport)
2286 return -EIO;
2287
2288 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2289 pattr = stats_attrs[rocker_port_stats[i].type];
2290 if (!pattr)
2291 continue;
2292
2293 data[i] = rocker_tlv_get_u64(pattr);
2294 }
2295
2296 return 0;
2297}
2298
2299static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2300 void *priv)
2301{
2302 return rocker_cmd_exec(rocker_port, false,
2303 rocker_cmd_get_port_stats_prep, NULL,
2304 rocker_cmd_get_port_stats_ethtool_proc,
2305 priv);
2306}
2307
2308static void rocker_port_get_stats(struct net_device *dev,
2309 struct ethtool_stats *stats, u64 *data)
2310{
2311 struct rocker_port *rocker_port = netdev_priv(dev);
2312
2313 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2314 int i;
2315
2316 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2317 data[i] = 0;
2318 }
2319}
2320
2321static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2322{
2323 switch (sset) {
2324 case ETH_SS_STATS:
2325 return ROCKER_PORT_STATS_LEN;
2326 default:
2327 return -EOPNOTSUPP;
2328 }
2329}
2330
2331static const struct ethtool_ops rocker_port_ethtool_ops = {
2332 .get_settings = rocker_port_get_settings,
2333 .set_settings = rocker_port_set_settings,
2334 .get_drvinfo = rocker_port_get_drvinfo,
2335 .get_link = ethtool_op_get_link,
2336 .get_strings = rocker_port_get_strings,
2337 .get_ethtool_stats = rocker_port_get_stats,
2338 .get_sset_count = rocker_port_get_sset_count,
2339};
2340
2341/*****************
2342 * NAPI interface
2343 *****************/
2344
2345static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2346{
2347 return container_of(napi, struct rocker_port, napi_tx);
2348}
2349
2350static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2351{
2352 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2353 const struct rocker *rocker = rocker_port->rocker;
2354 const struct rocker_desc_info *desc_info;
2355 u32 credits = 0;
2356 int err;
2357
2358 /* Cleanup tx descriptors */
2359 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2360 struct sk_buff *skb;
2361
2362 err = rocker_desc_err(desc_info);
2363 if (err && net_ratelimit())
2364 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2365 err);
2366 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2367
2368 skb = rocker_desc_cookie_ptr_get(desc_info);
2369 if (err == 0) {
2370 rocker_port->dev->stats.tx_packets++;
2371 rocker_port->dev->stats.tx_bytes += skb->len;
2372 } else {
2373 rocker_port->dev->stats.tx_errors++;
2374 }
2375
2376 dev_kfree_skb_any(skb);
2377 credits++;
2378 }
2379
2380 if (credits && netif_queue_stopped(rocker_port->dev))
2381 netif_wake_queue(rocker_port->dev);
2382
2383 napi_complete(napi);
2384 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2385
2386 return 0;
2387}
2388
2389static int rocker_port_rx_proc(const struct rocker *rocker,
2390 const struct rocker_port *rocker_port,
2391 struct rocker_desc_info *desc_info)
2392{
2393 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2394 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2395 size_t rx_len;
2396 u16 rx_flags = 0;
2397
2398 if (!skb)
2399 return -ENOENT;
2400
2401 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2402 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2403 return -EINVAL;
2404 if (attrs[ROCKER_TLV_RX_FLAGS])
2405 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2406
2407 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2408
2409 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2410 skb_put(skb, rx_len);
2411 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2412
2413 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2414 skb->offload_fwd_mark = rocker_port->dev->offload_fwd_mark;
2415
2416 rocker_port->dev->stats.rx_packets++;
2417 rocker_port->dev->stats.rx_bytes += skb->len;
2418
2419 netif_receive_skb(skb);
2420
2421 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2422}
2423
2424static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2425{
2426 return container_of(napi, struct rocker_port, napi_rx);
2427}
2428
2429static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2430{
2431 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2432 const struct rocker *rocker = rocker_port->rocker;
2433 struct rocker_desc_info *desc_info;
2434 u32 credits = 0;
2435 int err;
2436
2437 /* Process rx descriptors */
2438 while (credits < budget &&
2439 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2440 err = rocker_desc_err(desc_info);
2441 if (err) {
2442 if (net_ratelimit())
2443 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2444 err);
2445 } else {
2446 err = rocker_port_rx_proc(rocker, rocker_port,
2447 desc_info);
2448 if (err && net_ratelimit())
2449 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2450 err);
2451 }
2452 if (err)
2453 rocker_port->dev->stats.rx_errors++;
2454
2455 rocker_desc_gen_clear(desc_info);
2456 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2457 credits++;
2458 }
2459
2460 if (credits < budget)
2461 napi_complete(napi);
2462
2463 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2464
2465 return credits;
2466}
2467
2468/*****************
2469 * PCI driver ops
2470 *****************/
2471
2472static void rocker_carrier_init(const struct rocker_port *rocker_port)
2473{
2474 const struct rocker *rocker = rocker_port->rocker;
2475 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2476 bool link_up;
2477
2478 link_up = link_status & (1 << rocker_port->pport);
2479 if (link_up)
2480 netif_carrier_on(rocker_port->dev);
2481 else
2482 netif_carrier_off(rocker_port->dev);
2483}
2484
2485static void rocker_remove_ports(struct rocker *rocker)
2486{
2487 struct rocker_port *rocker_port;
2488 int i;
2489
2490 for (i = 0; i < rocker->port_count; i++) {
2491 rocker_port = rocker->ports[i];
2492 if (!rocker_port)
2493 continue;
2494 rocker_world_port_fini(rocker_port);
2495 unregister_netdev(rocker_port->dev);
2496 rocker_world_port_post_fini(rocker_port);
2497 free_netdev(rocker_port->dev);
2498 }
2499 rocker_world_fini(rocker);
2500 kfree(rocker->ports);
2501}
2502
2503static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2504{
2505 const struct rocker *rocker = rocker_port->rocker;
2506 const struct pci_dev *pdev = rocker->pdev;
2507 int err;
2508
2509 err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2510 rocker_port->dev->dev_addr);
2511 if (err) {
2512 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2513 eth_hw_addr_random(rocker_port->dev);
2514 }
2515}
2516
2517static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2518{
2519 const struct pci_dev *pdev = rocker->pdev;
2520 struct rocker_port *rocker_port;
2521 struct net_device *dev;
2522 int err;
2523
2524 dev = alloc_etherdev(sizeof(struct rocker_port));
2525 if (!dev)
2526 return -ENOMEM;
2527 rocker_port = netdev_priv(dev);
2528 rocker_port->dev = dev;
2529 rocker_port->rocker = rocker;
2530 rocker_port->port_number = port_number;
2531 rocker_port->pport = port_number + 1;
2532
2533 err = rocker_world_check_init(rocker_port);
2534 if (err) {
2535 dev_err(&pdev->dev, "world init failed\n");
2536 goto err_world_check_init;
2537 }
2538
2539 rocker_port_dev_addr_init(rocker_port);
2540 dev->netdev_ops = &rocker_port_netdev_ops;
2541 dev->ethtool_ops = &rocker_port_ethtool_ops;
2542 dev->switchdev_ops = &rocker_port_switchdev_ops;
2543 netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2544 NAPI_POLL_WEIGHT);
2545 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2546 NAPI_POLL_WEIGHT);
2547 rocker_carrier_init(rocker_port);
2548
2549 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2550
2551 err = rocker_world_port_pre_init(rocker_port);
2552 if (err) {
2553 dev_err(&pdev->dev, "port world pre-init failed\n");
2554 goto err_world_port_pre_init;
2555 }
2556 err = register_netdev(dev);
2557 if (err) {
2558 dev_err(&pdev->dev, "register_netdev failed\n");
2559 goto err_register_netdev;
2560 }
2561 rocker->ports[port_number] = rocker_port;
2562
2563 err = rocker_world_port_init(rocker_port);
2564 if (err) {
2565 dev_err(&pdev->dev, "port world init failed\n");
2566 goto err_world_port_init;
2567 }
2568
2569 return 0;
2570
2571err_world_port_init:
2572 rocker->ports[port_number] = NULL;
2573 unregister_netdev(dev);
2574err_register_netdev:
2575 rocker_world_port_post_fini(rocker_port);
2576err_world_port_pre_init:
2577err_world_check_init:
2578 free_netdev(dev);
2579 return err;
2580}
2581
2582static int rocker_probe_ports(struct rocker *rocker)
2583{
2584 int i;
2585 size_t alloc_size;
2586 int err;
2587
2588 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2589 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2590 if (!rocker->ports)
2591 return -ENOMEM;
2592 for (i = 0; i < rocker->port_count; i++) {
2593 err = rocker_probe_port(rocker, i);
2594 if (err)
2595 goto remove_ports;
2596 }
2597 return 0;
2598
2599remove_ports:
2600 rocker_remove_ports(rocker);
2601 return err;
2602}
2603
2604static int rocker_msix_init(struct rocker *rocker)
2605{
2606 struct pci_dev *pdev = rocker->pdev;
2607 int msix_entries;
2608 int i;
2609 int err;
2610
2611 msix_entries = pci_msix_vec_count(pdev);
2612 if (msix_entries < 0)
2613 return msix_entries;
2614
2615 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2616 return -EINVAL;
2617
2618 rocker->msix_entries = kmalloc_array(msix_entries,
2619 sizeof(struct msix_entry),
2620 GFP_KERNEL);
2621 if (!rocker->msix_entries)
2622 return -ENOMEM;
2623
2624 for (i = 0; i < msix_entries; i++)
2625 rocker->msix_entries[i].entry = i;
2626
2627 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2628 if (err < 0)
2629 goto err_enable_msix;
2630
2631 return 0;
2632
2633err_enable_msix:
2634 kfree(rocker->msix_entries);
2635 return err;
2636}
2637
2638static void rocker_msix_fini(const struct rocker *rocker)
2639{
2640 pci_disable_msix(rocker->pdev);
2641 kfree(rocker->msix_entries);
2642}
2643
2644static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2645{
2646 struct rocker *rocker;
2647 int err;
2648
2649 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2650 if (!rocker)
2651 return -ENOMEM;
2652
2653 err = pci_enable_device(pdev);
2654 if (err) {
2655 dev_err(&pdev->dev, "pci_enable_device failed\n");
2656 goto err_pci_enable_device;
2657 }
2658
2659 err = pci_request_regions(pdev, rocker_driver_name);
2660 if (err) {
2661 dev_err(&pdev->dev, "pci_request_regions failed\n");
2662 goto err_pci_request_regions;
2663 }
2664
2665 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2666 if (!err) {
2667 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2668 if (err) {
2669 dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2670 goto err_pci_set_dma_mask;
2671 }
2672 } else {
2673 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2674 if (err) {
2675 dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2676 goto err_pci_set_dma_mask;
2677 }
2678 }
2679
2680 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2681 dev_err(&pdev->dev, "invalid PCI region size\n");
2682 err = -EINVAL;
2683 goto err_pci_resource_len_check;
2684 }
2685
2686 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2687 pci_resource_len(pdev, 0));
2688 if (!rocker->hw_addr) {
2689 dev_err(&pdev->dev, "ioremap failed\n");
2690 err = -EIO;
2691 goto err_ioremap;
2692 }
2693 pci_set_master(pdev);
2694
2695 rocker->pdev = pdev;
2696 pci_set_drvdata(pdev, rocker);
2697
2698 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2699
2700 err = rocker_msix_init(rocker);
2701 if (err) {
2702 dev_err(&pdev->dev, "MSI-X init failed\n");
2703 goto err_msix_init;
2704 }
2705
2706 err = rocker_basic_hw_test(rocker);
2707 if (err) {
2708 dev_err(&pdev->dev, "basic hw test failed\n");
2709 goto err_basic_hw_test;
2710 }
2711
2712 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2713
2714 err = rocker_dma_rings_init(rocker);
2715 if (err)
2716 goto err_dma_rings_init;
2717
2718 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2719 rocker_cmd_irq_handler, 0,
2720 rocker_driver_name, rocker);
2721 if (err) {
2722 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2723 goto err_request_cmd_irq;
2724 }
2725
2726 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2727 rocker_event_irq_handler, 0,
2728 rocker_driver_name, rocker);
2729 if (err) {
2730 dev_err(&pdev->dev, "cannot assign event irq\n");
2731 goto err_request_event_irq;
2732 }
2733
2734 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2735
2736 err = rocker_probe_ports(rocker);
2737 if (err) {
2738 dev_err(&pdev->dev, "failed to probe ports\n");
2739 goto err_probe_ports;
2740 }
2741
2742 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2743 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2744
2745 return 0;
2746
2747err_probe_ports:
2748 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2749err_request_event_irq:
2750 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2751err_request_cmd_irq:
2752 rocker_dma_rings_fini(rocker);
2753err_dma_rings_init:
2754err_basic_hw_test:
2755 rocker_msix_fini(rocker);
2756err_msix_init:
2757 iounmap(rocker->hw_addr);
2758err_ioremap:
2759err_pci_resource_len_check:
2760err_pci_set_dma_mask:
2761 pci_release_regions(pdev);
2762err_pci_request_regions:
2763 pci_disable_device(pdev);
2764err_pci_enable_device:
2765 kfree(rocker);
2766 return err;
2767}
2768
2769static void rocker_remove(struct pci_dev *pdev)
2770{
2771 struct rocker *rocker = pci_get_drvdata(pdev);
2772
2773 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2774 rocker_remove_ports(rocker);
2775 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2776 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2777 rocker_dma_rings_fini(rocker);
2778 rocker_msix_fini(rocker);
2779 iounmap(rocker->hw_addr);
2780 pci_release_regions(rocker->pdev);
2781 pci_disable_device(rocker->pdev);
2782 kfree(rocker);
2783}
2784
2785static struct pci_driver rocker_pci_driver = {
2786 .name = rocker_driver_name,
2787 .id_table = rocker_pci_id_table,
2788 .probe = rocker_probe,
2789 .remove = rocker_remove,
2790};
2791
2792/************************************
2793 * Net device notifier event handler
2794 ************************************/
2795
2796static bool rocker_port_dev_check(const struct net_device *dev)
2797{
2798 return dev->netdev_ops == &rocker_port_netdev_ops;
2799}
2800
2801static int rocker_netdevice_event(struct notifier_block *unused,
2802 unsigned long event, void *ptr)
2803{
2804 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2805 struct netdev_notifier_changeupper_info *info;
2806 struct rocker_port *rocker_port;
2807 int err;
2808
2809 if (!rocker_port_dev_check(dev))
2810 return NOTIFY_DONE;
2811
2812 switch (event) {
2813 case NETDEV_CHANGEUPPER:
2814 info = ptr;
2815 if (!info->master)
2816 goto out;
2817 rocker_port = netdev_priv(dev);
2818 if (info->linking) {
2819 err = rocker_world_port_master_linked(rocker_port,
2820 info->upper_dev);
2821 if (err)
2822 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
2823 err);
2824 } else {
2825 err = rocker_world_port_master_unlinked(rocker_port,
2826 info->upper_dev);
2827 if (err)
2828 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
2829 err);
2830 }
2831 }
2832out:
2833 return NOTIFY_DONE;
2834}
2835
2836static struct notifier_block rocker_netdevice_nb __read_mostly = {
2837 .notifier_call = rocker_netdevice_event,
2838};
2839
2840/************************************
2841 * Net event notifier event handler
2842 ************************************/
2843
2844static int rocker_netevent_event(struct notifier_block *unused,
2845 unsigned long event, void *ptr)
2846{
2847 struct rocker_port *rocker_port;
2848 struct net_device *dev;
2849 struct neighbour *n = ptr;
2850 int err;
2851
2852 switch (event) {
2853 case NETEVENT_NEIGH_UPDATE:
2854 if (n->tbl != &arp_tbl)
2855 return NOTIFY_DONE;
2856 dev = n->dev;
2857 if (!rocker_port_dev_check(dev))
2858 return NOTIFY_DONE;
2859 rocker_port = netdev_priv(dev);
2860 err = rocker_world_port_neigh_update(rocker_port, n);
2861 if (err)
2862 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
2863 err);
2864 break;
2865 }
2866
2867 return NOTIFY_DONE;
2868}
2869
2870static struct notifier_block rocker_netevent_nb __read_mostly = {
2871 .notifier_call = rocker_netevent_event,
2872};
2873
2874/***********************
2875 * Module init and exit
2876 ***********************/
2877
2878static int __init rocker_module_init(void)
2879{
2880 int err;
2881
2882 register_netdevice_notifier(&rocker_netdevice_nb);
2883 register_netevent_notifier(&rocker_netevent_nb);
2884 err = pci_register_driver(&rocker_pci_driver);
2885 if (err)
2886 goto err_pci_register_driver;
2887 return 0;
2888
2889err_pci_register_driver:
2890 unregister_netevent_notifier(&rocker_netevent_nb);
2891 unregister_netdevice_notifier(&rocker_netdevice_nb);
2892 return err;
2893}
2894
2895static void __exit rocker_module_exit(void)
2896{
2897 unregister_netevent_notifier(&rocker_netevent_nb);
2898 unregister_netdevice_notifier(&rocker_netdevice_nb);
2899 pci_unregister_driver(&rocker_pci_driver);
2900}
2901
2902module_init(rocker_module_init);
2903module_exit(rocker_module_exit);
2904
2905MODULE_LICENSE("GPL v2");
2906MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2907MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
2908MODULE_DESCRIPTION("Rocker switch device driver");
2909MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);