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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / net / ethernet / rocker / rocker_main.c
blobf0b09b05ed3f1eb0461fc52ebfee26dea8e2dda2
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
42 static const char rocker_driver_name[] = "rocker";
43
44 static const struct pci_device_id rocker_pci_id_table[] = {
45 {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
46 {0, }
47 };
48
49 struct rocker_wait {
50 wait_queue_head_t wait;
51 bool done;
52 bool nowait;
53 };
54
55 static void rocker_wait_reset(struct rocker_wait *wait)
56 {
57 wait->done = false;
58 wait->nowait = false;
59 }
60
61 static void rocker_wait_init(struct rocker_wait *wait)
62 {
63 init_waitqueue_head(&wait->wait);
64 rocker_wait_reset(wait);
65 }
66
67 static 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
77 static void rocker_wait_destroy(struct rocker_wait *wait)
78 {
79 kfree(wait);
80 }
81
82 static 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
91 static void rocker_wait_wake_up(struct rocker_wait *wait)
92 {
93 wait->done = true;
94 wake_up(&wait->wait);
95 }
96
97 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
98 {
99 return rocker->msix_entries[vector].vector;
100 }
101
102 static 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
108 static 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
127 static 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
157 static 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
186 static 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
237 unmap:
238 pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
239 PCI_DMA_BIDIRECTIONAL);
240 free_alloc:
241 kfree(alloc);
242
243 return err;
244 }
245
246 static 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
260 static 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
269 static 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
302 free_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
311 static u32 __pos_inc(u32 pos, size_t limit)
312 {
313 return ++pos == limit ? 0 : pos;
314 }
315
316 static 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
344 static 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
349 static 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
356 static void *
357 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
358 {
359 return (void *)(uintptr_t)desc_info->desc->cookie;
360 }
361
362 static 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
368 static struct rocker_desc_info *
369 rocker_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
381 static 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
387 static 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
399 static struct rocker_desc_info *
400 rocker_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
414 static 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
422 static 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
428 static 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
464 static 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
475 static 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
490 static 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
526 rollback:
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
537 static 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
556 static 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
567 static void
568 rocker_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
575 static 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
588 rollback:
589 for (i--; i >= 0; i--)
590 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
591 return err;
592 }
593
594 static 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
603 static 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
648 err_dma_event_ring_bufs_alloc:
649 rocker_dma_ring_destroy(rocker, &rocker->event_ring);
650 err_dma_event_ring_create:
651 rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
652 PCI_DMA_BIDIRECTIONAL);
653 err_dma_cmd_ring_waits_alloc:
654 rocker_dma_cmd_ring_waits_free(rocker);
655 err_dma_cmd_ring_bufs_alloc:
656 rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
657 return err;
658 }
659
660 static 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
671 static 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
689 tlv_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
695 static 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
700 static 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
726 static 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
741 static 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
754 static 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
769 rollback:
770 for (i--; i >= 0; i--)
771 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
772 return err;
773 }
774
775 static 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
785 static 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
833 err_dma_rx_ring_skbs_alloc:
834 rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
835 PCI_DMA_BIDIRECTIONAL);
836 err_dma_rx_ring_bufs_alloc:
837 rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
838 err_dma_rx_ring_create:
839 rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
840 PCI_DMA_TODEVICE);
841 err_dma_tx_ring_bufs_alloc:
842 rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
843 return err;
844 }
845
846 static 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
859 static 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
875 static 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
898 static 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
904 static 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
910 static 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
940 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
941 const unsigned char *addr,
942 __be16 vlan_id);
943
944 static 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
970 static 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
995 static 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
1023 static 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
1031 static 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
1043 int 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
1092 static int
1093 rocker_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
1112 static int
1113 rocker_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
1150 static int
1151 rocker_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
1177 static int
1178 rocker_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
1201 struct port_name {
1202 char *buf;
1203 size_t len;
1204 };
1205
1206 static int
1207 rocker_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
1247 static int
1248 rocker_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
1277 static int
1278 rocker_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
1301 static int
1302 rocker_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
1325 static int
1326 rocker_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
1349 static 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
1358 static 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
1367 static 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
1375 static 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
1383 static 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
1391 static 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
1399 int 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
1411 static 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
1417 static 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
1427 static 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
1450 static 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
1460 static 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
1481 static 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
1497 static 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
1506 static 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
1515 static 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
1525 static 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
1534 static 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
1543 static 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
1554 static int
1555 rocker_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
1567 static int
1568 rocker_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
1578 static int
1579 rocker_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
1592 static int
1593 rocker_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
1604 static int
1605 rocker_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
1615 static int
1616 rocker_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
1627 static int
1628 rocker_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
1639 static int
1640 rocker_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
1650 static int
1651 rocker_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
1662 static int
1663 rocker_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
1673 static int
1674 rocker_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
1685 static 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
1695 static 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
1705 static 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
1715 static 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
1725 static 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
1740 static 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
1778 err_world_port_open:
1779 free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1780 err_request_rx_irq:
1781 free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1782 err_request_tx_irq:
1783 rocker_port_dma_rings_fini(rocker_port);
1784 return err;
1785 }
1786
1787 static 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
1803 static 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
1833 static 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
1860 nest_cancel:
1861 rocker_tlv_nest_cancel(desc_info, frag);
1862 unmap_frag:
1863 pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1864 return -EMSGSIZE;
1865 }
1866
1867 static 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
1918 unmap_frags:
1919 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1920 nest_cancel:
1921 rocker_tlv_nest_cancel(desc_info, frags);
1922 out:
1923 dev_kfree_skb(skb);
1924 dev->stats.tx_dropped++;
1925
1926 return NETDEV_TX_OK;
1927 }
1928
1929 static 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
1945 static 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
1973 static 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
1988 static 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
1999 static void rocker_port_neigh_destroy(struct net_device *dev,
2000 struct neighbour *n)
2001 {
2002 struct rocker_port *rocker_port = netdev_priv(n->dev);
2003 int err;
2004
2005 err = rocker_world_port_neigh_destroy(rocker_port, n);
2006 if (err)
2007 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2008 err);
2009 }
2010
2011 static const struct net_device_ops rocker_port_netdev_ops = {
2012 .ndo_open = rocker_port_open,
2013 .ndo_stop = rocker_port_stop,
2014 .ndo_start_xmit = rocker_port_xmit,
2015 .ndo_set_mac_address = rocker_port_set_mac_address,
2016 .ndo_change_mtu = rocker_port_change_mtu,
2017 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2018 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2019 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2020 .ndo_fdb_add = switchdev_port_fdb_add,
2021 .ndo_fdb_del = switchdev_port_fdb_del,
2022 .ndo_fdb_dump = switchdev_port_fdb_dump,
2023 .ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2024 .ndo_change_proto_down = rocker_port_change_proto_down,
2025 .ndo_neigh_destroy = rocker_port_neigh_destroy,
2026 };
2027
2028 /********************
2029 * swdev interface
2030 ********************/
2031
2032 static int rocker_port_attr_get(struct net_device *dev,
2033 struct switchdev_attr *attr)
2034 {
2035 const struct rocker_port *rocker_port = netdev_priv(dev);
2036 const struct rocker *rocker = rocker_port->rocker;
2037 int err = 0;
2038
2039 switch (attr->id) {
2040 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
2041 attr->u.ppid.id_len = sizeof(rocker->hw.id);
2042 memcpy(&attr->u.ppid.id, &rocker->hw.id, attr->u.ppid.id_len);
2043 break;
2044 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2045 err = rocker_world_port_attr_bridge_flags_get(rocker_port,
2046 &attr->u.brport_flags);
2047 break;
2048 default:
2049 return -EOPNOTSUPP;
2050 }
2051
2052 return err;
2053 }
2054
2055 static int rocker_port_attr_set(struct net_device *dev,
2056 const struct switchdev_attr *attr,
2057 struct switchdev_trans *trans)
2058 {
2059 struct rocker_port *rocker_port = netdev_priv(dev);
2060 int err = 0;
2061
2062 switch (attr->id) {
2063 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2064 err = rocker_world_port_attr_stp_state_set(rocker_port,
2065 attr->u.stp_state,
2066 trans);
2067 break;
2068 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2069 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2070 attr->u.brport_flags,
2071 trans);
2072 break;
2073 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2074 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2075 attr->u.ageing_time,
2076 trans);
2077 break;
2078 default:
2079 err = -EOPNOTSUPP;
2080 break;
2081 }
2082
2083 return err;
2084 }
2085
2086 static int rocker_port_obj_add(struct net_device *dev,
2087 const struct switchdev_obj *obj,
2088 struct switchdev_trans *trans)
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_add(rocker_port,
2096 SWITCHDEV_OBJ_PORT_VLAN(obj),
2097 trans);
2098 break;
2099 case SWITCHDEV_OBJ_ID_IPV4_FIB:
2100 err = rocker_world_port_obj_fib4_add(rocker_port,
2101 SWITCHDEV_OBJ_IPV4_FIB(obj),
2102 trans);
2103 break;
2104 case SWITCHDEV_OBJ_ID_PORT_FDB:
2105 err = rocker_world_port_obj_fdb_add(rocker_port,
2106 SWITCHDEV_OBJ_PORT_FDB(obj),
2107 trans);
2108 break;
2109 default:
2110 err = -EOPNOTSUPP;
2111 break;
2112 }
2113
2114 return err;
2115 }
2116
2117 static int rocker_port_obj_del(struct net_device *dev,
2118 const struct switchdev_obj *obj)
2119 {
2120 struct rocker_port *rocker_port = netdev_priv(dev);
2121 int err = 0;
2122
2123 switch (obj->id) {
2124 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2125 err = rocker_world_port_obj_vlan_del(rocker_port,
2126 SWITCHDEV_OBJ_PORT_VLAN(obj));
2127 break;
2128 case SWITCHDEV_OBJ_ID_IPV4_FIB:
2129 err = rocker_world_port_obj_fib4_del(rocker_port,
2130 SWITCHDEV_OBJ_IPV4_FIB(obj));
2131 break;
2132 case SWITCHDEV_OBJ_ID_PORT_FDB:
2133 err = rocker_world_port_obj_fdb_del(rocker_port,
2134 SWITCHDEV_OBJ_PORT_FDB(obj));
2135 break;
2136 default:
2137 err = -EOPNOTSUPP;
2138 break;
2139 }
2140
2141 return err;
2142 }
2143
2144 static int rocker_port_obj_dump(struct net_device *dev,
2145 struct switchdev_obj *obj,
2146 switchdev_obj_dump_cb_t *cb)
2147 {
2148 const struct rocker_port *rocker_port = netdev_priv(dev);
2149 int err = 0;
2150
2151 switch (obj->id) {
2152 case SWITCHDEV_OBJ_ID_PORT_FDB:
2153 err = rocker_world_port_obj_fdb_dump(rocker_port,
2154 SWITCHDEV_OBJ_PORT_FDB(obj),
2155 cb);
2156 break;
2157 case SWITCHDEV_OBJ_ID_PORT_VLAN:
2158 err = rocker_world_port_obj_vlan_dump(rocker_port,
2159 SWITCHDEV_OBJ_PORT_VLAN(obj),
2160 cb);
2161 break;
2162 default:
2163 err = -EOPNOTSUPP;
2164 break;
2165 }
2166
2167 return err;
2168 }
2169
2170 static const struct switchdev_ops rocker_port_switchdev_ops = {
2171 .switchdev_port_attr_get = rocker_port_attr_get,
2172 .switchdev_port_attr_set = rocker_port_attr_set,
2173 .switchdev_port_obj_add = rocker_port_obj_add,
2174 .switchdev_port_obj_del = rocker_port_obj_del,
2175 .switchdev_port_obj_dump = rocker_port_obj_dump,
2176 };
2177
2178 /********************
2179 * ethtool interface
2180 ********************/
2181
2182 static int rocker_port_get_settings(struct net_device *dev,
2183 struct ethtool_cmd *ecmd)
2184 {
2185 struct rocker_port *rocker_port = netdev_priv(dev);
2186
2187 return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2188 }
2189
2190 static int rocker_port_set_settings(struct net_device *dev,
2191 struct ethtool_cmd *ecmd)
2192 {
2193 struct rocker_port *rocker_port = netdev_priv(dev);
2194
2195 return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2196 }
2197
2198 static void rocker_port_get_drvinfo(struct net_device *dev,
2199 struct ethtool_drvinfo *drvinfo)
2200 {
2201 strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2202 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2203 }
2204
2205 static struct rocker_port_stats {
2206 char str[ETH_GSTRING_LEN];
2207 int type;
2208 } rocker_port_stats[] = {
2209 { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2210 { "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2211 { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2212 { "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2213
2214 { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2215 { "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2216 { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2217 { "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2218 };
2219
2220 #define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2221
2222 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2223 u8 *data)
2224 {
2225 u8 *p = data;
2226 int i;
2227
2228 switch (stringset) {
2229 case ETH_SS_STATS:
2230 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2231 memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2232 p += ETH_GSTRING_LEN;
2233 }
2234 break;
2235 }
2236 }
2237
2238 static int
2239 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2240 struct rocker_desc_info *desc_info,
2241 void *priv)
2242 {
2243 struct rocker_tlv *cmd_stats;
2244
2245 if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2246 ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2247 return -EMSGSIZE;
2248
2249 cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2250 if (!cmd_stats)
2251 return -EMSGSIZE;
2252
2253 if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2254 rocker_port->pport))
2255 return -EMSGSIZE;
2256
2257 rocker_tlv_nest_end(desc_info, cmd_stats);
2258
2259 return 0;
2260 }
2261
2262 static int
2263 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2264 const struct rocker_desc_info *desc_info,
2265 void *priv)
2266 {
2267 const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2268 const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2269 const struct rocker_tlv *pattr;
2270 u32 pport;
2271 u64 *data = priv;
2272 int i;
2273
2274 rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2275
2276 if (!attrs[ROCKER_TLV_CMD_INFO])
2277 return -EIO;
2278
2279 rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2280 attrs[ROCKER_TLV_CMD_INFO]);
2281
2282 if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2283 return -EIO;
2284
2285 pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2286 if (pport != rocker_port->pport)
2287 return -EIO;
2288
2289 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2290 pattr = stats_attrs[rocker_port_stats[i].type];
2291 if (!pattr)
2292 continue;
2293
2294 data[i] = rocker_tlv_get_u64(pattr);
2295 }
2296
2297 return 0;
2298 }
2299
2300 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2301 void *priv)
2302 {
2303 return rocker_cmd_exec(rocker_port, false,
2304 rocker_cmd_get_port_stats_prep, NULL,
2305 rocker_cmd_get_port_stats_ethtool_proc,
2306 priv);
2307 }
2308
2309 static void rocker_port_get_stats(struct net_device *dev,
2310 struct ethtool_stats *stats, u64 *data)
2311 {
2312 struct rocker_port *rocker_port = netdev_priv(dev);
2313
2314 if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2315 int i;
2316
2317 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2318 data[i] = 0;
2319 }
2320 }
2321
2322 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2323 {
2324 switch (sset) {
2325 case ETH_SS_STATS:
2326 return ROCKER_PORT_STATS_LEN;
2327 default:
2328 return -EOPNOTSUPP;
2329 }
2330 }
2331
2332 static const struct ethtool_ops rocker_port_ethtool_ops = {
2333 .get_settings = rocker_port_get_settings,
2334 .set_settings = rocker_port_set_settings,
2335 .get_drvinfo = rocker_port_get_drvinfo,
2336 .get_link = ethtool_op_get_link,
2337 .get_strings = rocker_port_get_strings,
2338 .get_ethtool_stats = rocker_port_get_stats,
2339 .get_sset_count = rocker_port_get_sset_count,
2340 };
2341
2342 /*****************
2343 * NAPI interface
2344 *****************/
2345
2346 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2347 {
2348 return container_of(napi, struct rocker_port, napi_tx);
2349 }
2350
2351 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2352 {
2353 struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2354 const struct rocker *rocker = rocker_port->rocker;
2355 const struct rocker_desc_info *desc_info;
2356 u32 credits = 0;
2357 int err;
2358
2359 /* Cleanup tx descriptors */
2360 while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2361 struct sk_buff *skb;
2362
2363 err = rocker_desc_err(desc_info);
2364 if (err && net_ratelimit())
2365 netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2366 err);
2367 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2368
2369 skb = rocker_desc_cookie_ptr_get(desc_info);
2370 if (err == 0) {
2371 rocker_port->dev->stats.tx_packets++;
2372 rocker_port->dev->stats.tx_bytes += skb->len;
2373 } else {
2374 rocker_port->dev->stats.tx_errors++;
2375 }
2376
2377 dev_kfree_skb_any(skb);
2378 credits++;
2379 }
2380
2381 if (credits && netif_queue_stopped(rocker_port->dev))
2382 netif_wake_queue(rocker_port->dev);
2383
2384 napi_complete(napi);
2385 rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2386
2387 return 0;
2388 }
2389
2390 static int rocker_port_rx_proc(const struct rocker *rocker,
2391 const struct rocker_port *rocker_port,
2392 struct rocker_desc_info *desc_info)
2393 {
2394 const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2395 struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2396 size_t rx_len;
2397 u16 rx_flags = 0;
2398
2399 if (!skb)
2400 return -ENOENT;
2401
2402 rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2403 if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2404 return -EINVAL;
2405 if (attrs[ROCKER_TLV_RX_FLAGS])
2406 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2407
2408 rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2409
2410 rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2411 skb_put(skb, rx_len);
2412 skb->protocol = eth_type_trans(skb, rocker_port->dev);
2413
2414 if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2415 skb->offload_fwd_mark = rocker_port->dev->offload_fwd_mark;
2416
2417 rocker_port->dev->stats.rx_packets++;
2418 rocker_port->dev->stats.rx_bytes += skb->len;
2419
2420 netif_receive_skb(skb);
2421
2422 return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2423 }
2424
2425 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2426 {
2427 return container_of(napi, struct rocker_port, napi_rx);
2428 }
2429
2430 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2431 {
2432 struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2433 const struct rocker *rocker = rocker_port->rocker;
2434 struct rocker_desc_info *desc_info;
2435 u32 credits = 0;
2436 int err;
2437
2438 /* Process rx descriptors */
2439 while (credits < budget &&
2440 (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2441 err = rocker_desc_err(desc_info);
2442 if (err) {
2443 if (net_ratelimit())
2444 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2445 err);
2446 } else {
2447 err = rocker_port_rx_proc(rocker, rocker_port,
2448 desc_info);
2449 if (err && net_ratelimit())
2450 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2451 err);
2452 }
2453 if (err)
2454 rocker_port->dev->stats.rx_errors++;
2455
2456 rocker_desc_gen_clear(desc_info);
2457 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2458 credits++;
2459 }
2460
2461 if (credits < budget)
2462 napi_complete(napi);
2463
2464 rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2465
2466 return credits;
2467 }
2468
2469 /*****************
2470 * PCI driver ops
2471 *****************/
2472
2473 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2474 {
2475 const struct rocker *rocker = rocker_port->rocker;
2476 u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2477 bool link_up;
2478
2479 link_up = link_status & (1 << rocker_port->pport);
2480 if (link_up)
2481 netif_carrier_on(rocker_port->dev);
2482 else
2483 netif_carrier_off(rocker_port->dev);
2484 }
2485
2486 static void rocker_remove_ports(struct rocker *rocker)
2487 {
2488 struct rocker_port *rocker_port;
2489 int i;
2490
2491 for (i = 0; i < rocker->port_count; i++) {
2492 rocker_port = rocker->ports[i];
2493 if (!rocker_port)
2494 continue;
2495 rocker_world_port_fini(rocker_port);
2496 unregister_netdev(rocker_port->dev);
2497 rocker_world_port_post_fini(rocker_port);
2498 free_netdev(rocker_port->dev);
2499 }
2500 rocker_world_fini(rocker);
2501 kfree(rocker->ports);
2502 }
2503
2504 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2505 {
2506 const struct rocker *rocker = rocker_port->rocker;
2507 const struct pci_dev *pdev = rocker->pdev;
2508 int err;
2509
2510 err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2511 rocker_port->dev->dev_addr);
2512 if (err) {
2513 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2514 eth_hw_addr_random(rocker_port->dev);
2515 }
2516 }
2517
2518 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2519 {
2520 const struct pci_dev *pdev = rocker->pdev;
2521 struct rocker_port *rocker_port;
2522 struct net_device *dev;
2523 int err;
2524
2525 dev = alloc_etherdev(sizeof(struct rocker_port));
2526 if (!dev)
2527 return -ENOMEM;
2528 rocker_port = netdev_priv(dev);
2529 rocker_port->dev = dev;
2530 rocker_port->rocker = rocker;
2531 rocker_port->port_number = port_number;
2532 rocker_port->pport = port_number + 1;
2533
2534 err = rocker_world_check_init(rocker_port);
2535 if (err) {
2536 dev_err(&pdev->dev, "world init failed\n");
2537 goto err_world_check_init;
2538 }
2539
2540 rocker_port_dev_addr_init(rocker_port);
2541 dev->netdev_ops = &rocker_port_netdev_ops;
2542 dev->ethtool_ops = &rocker_port_ethtool_ops;
2543 dev->switchdev_ops = &rocker_port_switchdev_ops;
2544 netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2545 NAPI_POLL_WEIGHT);
2546 netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2547 NAPI_POLL_WEIGHT);
2548 rocker_carrier_init(rocker_port);
2549
2550 dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2551
2552 err = rocker_world_port_pre_init(rocker_port);
2553 if (err) {
2554 dev_err(&pdev->dev, "port world pre-init failed\n");
2555 goto err_world_port_pre_init;
2556 }
2557 err = register_netdev(dev);
2558 if (err) {
2559 dev_err(&pdev->dev, "register_netdev failed\n");
2560 goto err_register_netdev;
2561 }
2562 rocker->ports[port_number] = rocker_port;
2563
2564 err = rocker_world_port_init(rocker_port);
2565 if (err) {
2566 dev_err(&pdev->dev, "port world init failed\n");
2567 goto err_world_port_init;
2568 }
2569
2570 return 0;
2571
2572 err_world_port_init:
2573 rocker->ports[port_number] = NULL;
2574 unregister_netdev(dev);
2575 err_register_netdev:
2576 rocker_world_port_post_fini(rocker_port);
2577 err_world_port_pre_init:
2578 err_world_check_init:
2579 free_netdev(dev);
2580 return err;
2581 }
2582
2583 static int rocker_probe_ports(struct rocker *rocker)
2584 {
2585 int i;
2586 size_t alloc_size;
2587 int err;
2588
2589 alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2590 rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2591 if (!rocker->ports)
2592 return -ENOMEM;
2593 for (i = 0; i < rocker->port_count; i++) {
2594 err = rocker_probe_port(rocker, i);
2595 if (err)
2596 goto remove_ports;
2597 }
2598 return 0;
2599
2600 remove_ports:
2601 rocker_remove_ports(rocker);
2602 return err;
2603 }
2604
2605 static int rocker_msix_init(struct rocker *rocker)
2606 {
2607 struct pci_dev *pdev = rocker->pdev;
2608 int msix_entries;
2609 int i;
2610 int err;
2611
2612 msix_entries = pci_msix_vec_count(pdev);
2613 if (msix_entries < 0)
2614 return msix_entries;
2615
2616 if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2617 return -EINVAL;
2618
2619 rocker->msix_entries = kmalloc_array(msix_entries,
2620 sizeof(struct msix_entry),
2621 GFP_KERNEL);
2622 if (!rocker->msix_entries)
2623 return -ENOMEM;
2624
2625 for (i = 0; i < msix_entries; i++)
2626 rocker->msix_entries[i].entry = i;
2627
2628 err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2629 if (err < 0)
2630 goto err_enable_msix;
2631
2632 return 0;
2633
2634 err_enable_msix:
2635 kfree(rocker->msix_entries);
2636 return err;
2637 }
2638
2639 static void rocker_msix_fini(const struct rocker *rocker)
2640 {
2641 pci_disable_msix(rocker->pdev);
2642 kfree(rocker->msix_entries);
2643 }
2644
2645 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2646 {
2647 struct rocker *rocker;
2648 int err;
2649
2650 rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2651 if (!rocker)
2652 return -ENOMEM;
2653
2654 err = pci_enable_device(pdev);
2655 if (err) {
2656 dev_err(&pdev->dev, "pci_enable_device failed\n");
2657 goto err_pci_enable_device;
2658 }
2659
2660 err = pci_request_regions(pdev, rocker_driver_name);
2661 if (err) {
2662 dev_err(&pdev->dev, "pci_request_regions failed\n");
2663 goto err_pci_request_regions;
2664 }
2665
2666 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2667 if (!err) {
2668 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2669 if (err) {
2670 dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2671 goto err_pci_set_dma_mask;
2672 }
2673 } else {
2674 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2675 if (err) {
2676 dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2677 goto err_pci_set_dma_mask;
2678 }
2679 }
2680
2681 if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2682 dev_err(&pdev->dev, "invalid PCI region size\n");
2683 err = -EINVAL;
2684 goto err_pci_resource_len_check;
2685 }
2686
2687 rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2688 pci_resource_len(pdev, 0));
2689 if (!rocker->hw_addr) {
2690 dev_err(&pdev->dev, "ioremap failed\n");
2691 err = -EIO;
2692 goto err_ioremap;
2693 }
2694 pci_set_master(pdev);
2695
2696 rocker->pdev = pdev;
2697 pci_set_drvdata(pdev, rocker);
2698
2699 rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2700
2701 err = rocker_msix_init(rocker);
2702 if (err) {
2703 dev_err(&pdev->dev, "MSI-X init failed\n");
2704 goto err_msix_init;
2705 }
2706
2707 err = rocker_basic_hw_test(rocker);
2708 if (err) {
2709 dev_err(&pdev->dev, "basic hw test failed\n");
2710 goto err_basic_hw_test;
2711 }
2712
2713 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2714
2715 err = rocker_dma_rings_init(rocker);
2716 if (err)
2717 goto err_dma_rings_init;
2718
2719 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2720 rocker_cmd_irq_handler, 0,
2721 rocker_driver_name, rocker);
2722 if (err) {
2723 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2724 goto err_request_cmd_irq;
2725 }
2726
2727 err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2728 rocker_event_irq_handler, 0,
2729 rocker_driver_name, rocker);
2730 if (err) {
2731 dev_err(&pdev->dev, "cannot assign event irq\n");
2732 goto err_request_event_irq;
2733 }
2734
2735 rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2736
2737 err = rocker_probe_ports(rocker);
2738 if (err) {
2739 dev_err(&pdev->dev, "failed to probe ports\n");
2740 goto err_probe_ports;
2741 }
2742
2743 dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2744 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2745
2746 return 0;
2747
2748 err_probe_ports:
2749 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2750 err_request_event_irq:
2751 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2752 err_request_cmd_irq:
2753 rocker_dma_rings_fini(rocker);
2754 err_dma_rings_init:
2755 err_basic_hw_test:
2756 rocker_msix_fini(rocker);
2757 err_msix_init:
2758 iounmap(rocker->hw_addr);
2759 err_ioremap:
2760 err_pci_resource_len_check:
2761 err_pci_set_dma_mask:
2762 pci_release_regions(pdev);
2763 err_pci_request_regions:
2764 pci_disable_device(pdev);
2765 err_pci_enable_device:
2766 kfree(rocker);
2767 return err;
2768 }
2769
2770 static void rocker_remove(struct pci_dev *pdev)
2771 {
2772 struct rocker *rocker = pci_get_drvdata(pdev);
2773
2774 rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2775 rocker_remove_ports(rocker);
2776 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
2777 free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
2778 rocker_dma_rings_fini(rocker);
2779 rocker_msix_fini(rocker);
2780 iounmap(rocker->hw_addr);
2781 pci_release_regions(rocker->pdev);
2782 pci_disable_device(rocker->pdev);
2783 kfree(rocker);
2784 }
2785
2786 static struct pci_driver rocker_pci_driver = {
2787 .name = rocker_driver_name,
2788 .id_table = rocker_pci_id_table,
2789 .probe = rocker_probe,
2790 .remove = rocker_remove,
2791 };
2792
2793 /************************************
2794 * Net device notifier event handler
2795 ************************************/
2796
2797 static bool rocker_port_dev_check(const struct net_device *dev)
2798 {
2799 return dev->netdev_ops == &rocker_port_netdev_ops;
2800 }
2801
2802 static int rocker_netdevice_event(struct notifier_block *unused,
2803 unsigned long event, void *ptr)
2804 {
2805 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2806 struct netdev_notifier_changeupper_info *info;
2807 struct rocker_port *rocker_port;
2808 int err;
2809
2810 if (!rocker_port_dev_check(dev))
2811 return NOTIFY_DONE;
2812
2813 switch (event) {
2814 case NETDEV_CHANGEUPPER:
2815 info = ptr;
2816 if (!info->master)
2817 goto out;
2818 rocker_port = netdev_priv(dev);
2819 if (info->linking) {
2820 err = rocker_world_port_master_linked(rocker_port,
2821 info->upper_dev);
2822 if (err)
2823 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
2824 err);
2825 } else {
2826 err = rocker_world_port_master_unlinked(rocker_port,
2827 info->upper_dev);
2828 if (err)
2829 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
2830 err);
2831 }
2832 }
2833 out:
2834 return NOTIFY_DONE;
2835 }
2836
2837 static struct notifier_block rocker_netdevice_nb __read_mostly = {
2838 .notifier_call = rocker_netdevice_event,
2839 };
2840
2841 /************************************
2842 * Net event notifier event handler
2843 ************************************/
2844
2845 static int rocker_netevent_event(struct notifier_block *unused,
2846 unsigned long event, void *ptr)
2847 {
2848 struct rocker_port *rocker_port;
2849 struct net_device *dev;
2850 struct neighbour *n = ptr;
2851 int err;
2852
2853 switch (event) {
2854 case NETEVENT_NEIGH_UPDATE:
2855 if (n->tbl != &arp_tbl)
2856 return NOTIFY_DONE;
2857 dev = n->dev;
2858 if (!rocker_port_dev_check(dev))
2859 return NOTIFY_DONE;
2860 rocker_port = netdev_priv(dev);
2861 err = rocker_world_port_neigh_update(rocker_port, n);
2862 if (err)
2863 netdev_warn(dev, "failed to handle neigh update (err %d)\n",
2864 err);
2865 break;
2866 }
2867
2868 return NOTIFY_DONE;
2869 }
2870
2871 static struct notifier_block rocker_netevent_nb __read_mostly = {
2872 .notifier_call = rocker_netevent_event,
2873 };
2874
2875 /***********************
2876 * Module init and exit
2877 ***********************/
2878
2879 static int __init rocker_module_init(void)
2880 {
2881 int err;
2882
2883 register_netdevice_notifier(&rocker_netdevice_nb);
2884 register_netevent_notifier(&rocker_netevent_nb);
2885 err = pci_register_driver(&rocker_pci_driver);
2886 if (err)
2887 goto err_pci_register_driver;
2888 return 0;
2889
2890 err_pci_register_driver:
2891 unregister_netevent_notifier(&rocker_netevent_nb);
2892 unregister_netdevice_notifier(&rocker_netdevice_nb);
2893 return err;
2894 }
2895
2896 static void __exit rocker_module_exit(void)
2897 {
2898 unregister_netevent_notifier(&rocker_netevent_nb);
2899 unregister_netdevice_notifier(&rocker_netdevice_nb);
2900 pci_unregister_driver(&rocker_pci_driver);
2901 }
2902
2903 module_init(rocker_module_init);
2904 module_exit(rocker_module_exit);
2905
2906 MODULE_LICENSE("GPL v2");
2907 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2908 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
2909 MODULE_DESCRIPTION("Rocker switch device driver");
2910 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
CRIS linux kernel tree