1 /*
2  * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
3  * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
4  * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/interrupt.h>
16 #include <linux/sched.h>
17 #include <linux/wait.h>
18 #include <linux/spinlock.h>
19 #include <linux/sort.h>
20 #include <linux/random.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/socket.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/if_bridge.h>
29 #include <linux/bitops.h>
30 #include <linux/ctype.h>
31 #include <linux/workqueue.h>
32 #include <net/switchdev.h>
33 #include <net/rtnetlink.h>
34 #include <net/netevent.h>
35 #include <net/arp.h>
36 #include <net/fib_rules.h>
37 #include <net/fib_notifier.h>
38 #include <linux/io-64-nonatomic-lo-hi.h>
39 #include <generated/utsrelease.h>
40 
41 #include "rocker_hw.h"
42 #include "rocker.h"
43 #include "rocker_tlv.h"
44 
45 static const char rocker_driver_name[] = "rocker";
46 
47 static const struct pci_device_id rocker_pci_id_table[] = {
48 	{PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
49 	{0, }
50 };
51 
52 struct rocker_wait {
53 	wait_queue_head_t wait;
54 	bool done;
55 	bool nowait;
56 };
57 
58 static void rocker_wait_reset(struct rocker_wait *wait)
59 {
60 	wait->done = false;
61 	wait->nowait = false;
62 }
63 
64 static void rocker_wait_init(struct rocker_wait *wait)
65 {
66 	init_waitqueue_head(&wait->wait);
67 	rocker_wait_reset(wait);
68 }
69 
70 static struct rocker_wait *rocker_wait_create(void)
71 {
72 	struct rocker_wait *wait;
73 
74 	wait = kzalloc(sizeof(*wait), GFP_KERNEL);
75 	if (!wait)
76 		return NULL;
77 	return wait;
78 }
79 
80 static void rocker_wait_destroy(struct rocker_wait *wait)
81 {
82 	kfree(wait);
83 }
84 
85 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
86 				      unsigned long timeout)
87 {
88 	wait_event_timeout(wait->wait, wait->done, HZ / 10);
89 	if (!wait->done)
90 		return false;
91 	return true;
92 }
93 
94 static void rocker_wait_wake_up(struct rocker_wait *wait)
95 {
96 	wait->done = true;
97 	wake_up(&wait->wait);
98 }
99 
100 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
101 {
102 	return rocker->msix_entries[vector].vector;
103 }
104 
105 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
106 {
107 	return rocker_msix_vector(rocker_port->rocker,
108 				  ROCKER_MSIX_VEC_TX(rocker_port->port_number));
109 }
110 
111 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
112 {
113 	return rocker_msix_vector(rocker_port->rocker,
114 				  ROCKER_MSIX_VEC_RX(rocker_port->port_number));
115 }
116 
117 #define rocker_write32(rocker, reg, val)	\
118 	writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119 #define rocker_read32(rocker, reg)	\
120 	readl((rocker)->hw_addr + (ROCKER_ ## reg))
121 #define rocker_write64(rocker, reg, val)	\
122 	writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
123 #define rocker_read64(rocker, reg)	\
124 	readq((rocker)->hw_addr + (ROCKER_ ## reg))
125 
126 /*****************************
127  * HW basic testing functions
128  *****************************/
129 
130 static int rocker_reg_test(const struct rocker *rocker)
131 {
132 	const struct pci_dev *pdev = rocker->pdev;
133 	u64 test_reg;
134 	u64 rnd;
135 
136 	rnd = prandom_u32();
137 	rnd >>= 1;
138 	rocker_write32(rocker, TEST_REG, rnd);
139 	test_reg = rocker_read32(rocker, TEST_REG);
140 	if (test_reg != rnd * 2) {
141 		dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
142 			test_reg, rnd * 2);
143 		return -EIO;
144 	}
145 
146 	rnd = prandom_u32();
147 	rnd <<= 31;
148 	rnd |= prandom_u32();
149 	rocker_write64(rocker, TEST_REG64, rnd);
150 	test_reg = rocker_read64(rocker, TEST_REG64);
151 	if (test_reg != rnd * 2) {
152 		dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
153 			test_reg, rnd * 2);
154 		return -EIO;
155 	}
156 
157 	return 0;
158 }
159 
160 static int rocker_dma_test_one(const struct rocker *rocker,
161 			       struct rocker_wait *wait, u32 test_type,
162 			       dma_addr_t dma_handle, const unsigned char *buf,
163 			       const unsigned char *expect, size_t size)
164 {
165 	const struct pci_dev *pdev = rocker->pdev;
166 	int i;
167 
168 	rocker_wait_reset(wait);
169 	rocker_write32(rocker, TEST_DMA_CTRL, test_type);
170 
171 	if (!rocker_wait_event_timeout(wait, HZ / 10)) {
172 		dev_err(&pdev->dev, "no interrupt received within a timeout\n");
173 		return -EIO;
174 	}
175 
176 	for (i = 0; i < size; i++) {
177 		if (buf[i] != expect[i]) {
178 			dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
179 				buf[i], i, expect[i]);
180 			return -EIO;
181 		}
182 	}
183 	return 0;
184 }
185 
186 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
187 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
188 
189 static int rocker_dma_test_offset(const struct rocker *rocker,
190 				  struct rocker_wait *wait, int offset)
191 {
192 	struct pci_dev *pdev = rocker->pdev;
193 	unsigned char *alloc;
194 	unsigned char *buf;
195 	unsigned char *expect;
196 	dma_addr_t dma_handle;
197 	int i;
198 	int err;
199 
200 	alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
201 			GFP_KERNEL | GFP_DMA);
202 	if (!alloc)
203 		return -ENOMEM;
204 	buf = alloc + offset;
205 	expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
206 
207 	dma_handle = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
208 				    PCI_DMA_BIDIRECTIONAL);
209 	if (pci_dma_mapping_error(pdev, dma_handle)) {
210 		err = -EIO;
211 		goto free_alloc;
212 	}
213 
214 	rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
215 	rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
216 
217 	memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
218 	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
219 				  dma_handle, buf, expect,
220 				  ROCKER_TEST_DMA_BUF_SIZE);
221 	if (err)
222 		goto unmap;
223 
224 	memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
225 	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
226 				  dma_handle, buf, expect,
227 				  ROCKER_TEST_DMA_BUF_SIZE);
228 	if (err)
229 		goto unmap;
230 
231 	prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
232 	for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
233 		expect[i] = ~buf[i];
234 	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
235 				  dma_handle, buf, expect,
236 				  ROCKER_TEST_DMA_BUF_SIZE);
237 	if (err)
238 		goto unmap;
239 
240 unmap:
241 	pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
242 			 PCI_DMA_BIDIRECTIONAL);
243 free_alloc:
244 	kfree(alloc);
245 
246 	return err;
247 }
248 
249 static int rocker_dma_test(const struct rocker *rocker,
250 			   struct rocker_wait *wait)
251 {
252 	int i;
253 	int err;
254 
255 	for (i = 0; i < 8; i++) {
256 		err = rocker_dma_test_offset(rocker, wait, i);
257 		if (err)
258 			return err;
259 	}
260 	return 0;
261 }
262 
263 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
264 {
265 	struct rocker_wait *wait = dev_id;
266 
267 	rocker_wait_wake_up(wait);
268 
269 	return IRQ_HANDLED;
270 }
271 
272 static int rocker_basic_hw_test(const struct rocker *rocker)
273 {
274 	const struct pci_dev *pdev = rocker->pdev;
275 	struct rocker_wait wait;
276 	int err;
277 
278 	err = rocker_reg_test(rocker);
279 	if (err) {
280 		dev_err(&pdev->dev, "reg test failed\n");
281 		return err;
282 	}
283 
284 	err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
285 			  rocker_test_irq_handler, 0,
286 			  rocker_driver_name, &wait);
287 	if (err) {
288 		dev_err(&pdev->dev, "cannot assign test irq\n");
289 		return err;
290 	}
291 
292 	rocker_wait_init(&wait);
293 	rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
294 
295 	if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
296 		dev_err(&pdev->dev, "no interrupt received within a timeout\n");
297 		err = -EIO;
298 		goto free_irq;
299 	}
300 
301 	err = rocker_dma_test(rocker, &wait);
302 	if (err)
303 		dev_err(&pdev->dev, "dma test failed\n");
304 
305 free_irq:
306 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
307 	return err;
308 }
309 
310 /******************************************
311  * DMA rings and descriptors manipulations
312  ******************************************/
313 
314 static u32 __pos_inc(u32 pos, size_t limit)
315 {
316 	return ++pos == limit ? 0 : pos;
317 }
318 
319 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
320 {
321 	int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
322 
323 	switch (err) {
324 	case ROCKER_OK:
325 		return 0;
326 	case -ROCKER_ENOENT:
327 		return -ENOENT;
328 	case -ROCKER_ENXIO:
329 		return -ENXIO;
330 	case -ROCKER_ENOMEM:
331 		return -ENOMEM;
332 	case -ROCKER_EEXIST:
333 		return -EEXIST;
334 	case -ROCKER_EINVAL:
335 		return -EINVAL;
336 	case -ROCKER_EMSGSIZE:
337 		return -EMSGSIZE;
338 	case -ROCKER_ENOTSUP:
339 		return -EOPNOTSUPP;
340 	case -ROCKER_ENOBUFS:
341 		return -ENOBUFS;
342 	}
343 
344 	return -EINVAL;
345 }
346 
347 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
348 {
349 	desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
350 }
351 
352 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
353 {
354 	u32 comp_err = desc_info->desc->comp_err;
355 
356 	return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
357 }
358 
359 static void *
360 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
361 {
362 	return (void *)(uintptr_t)desc_info->desc->cookie;
363 }
364 
365 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
366 				       void *ptr)
367 {
368 	desc_info->desc->cookie = (uintptr_t) ptr;
369 }
370 
371 static struct rocker_desc_info *
372 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
373 {
374 	struct rocker_desc_info *desc_info;
375 	u32 head = __pos_inc(info->head, info->size);
376 
377 	desc_info = &info->desc_info[info->head];
378 	if (head == info->tail)
379 		return NULL; /* ring full */
380 	desc_info->tlv_size = 0;
381 	return desc_info;
382 }
383 
384 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
385 {
386 	desc_info->desc->buf_size = desc_info->data_size;
387 	desc_info->desc->tlv_size = desc_info->tlv_size;
388 }
389 
390 static void rocker_desc_head_set(const struct rocker *rocker,
391 				 struct rocker_dma_ring_info *info,
392 				 const struct rocker_desc_info *desc_info)
393 {
394 	u32 head = __pos_inc(info->head, info->size);
395 
396 	BUG_ON(head == info->tail);
397 	rocker_desc_commit(desc_info);
398 	info->head = head;
399 	rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
400 }
401 
402 static struct rocker_desc_info *
403 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
404 {
405 	struct rocker_desc_info *desc_info;
406 
407 	if (info->tail == info->head)
408 		return NULL; /* nothing to be done between head and tail */
409 	desc_info = &info->desc_info[info->tail];
410 	if (!rocker_desc_gen(desc_info))
411 		return NULL; /* gen bit not set, desc is not ready yet */
412 	info->tail = __pos_inc(info->tail, info->size);
413 	desc_info->tlv_size = desc_info->desc->tlv_size;
414 	return desc_info;
415 }
416 
417 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
418 					const struct rocker_dma_ring_info *info,
419 					u32 credits)
420 {
421 	if (credits)
422 		rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
423 }
424 
425 static unsigned long rocker_dma_ring_size_fix(size_t size)
426 {
427 	return max(ROCKER_DMA_SIZE_MIN,
428 		   min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
429 }
430 
431 static int rocker_dma_ring_create(const struct rocker *rocker,
432 				  unsigned int type,
433 				  size_t size,
434 				  struct rocker_dma_ring_info *info)
435 {
436 	int i;
437 
438 	BUG_ON(size != rocker_dma_ring_size_fix(size));
439 	info->size = size;
440 	info->type = type;
441 	info->head = 0;
442 	info->tail = 0;
443 	info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
444 				  GFP_KERNEL);
445 	if (!info->desc_info)
446 		return -ENOMEM;
447 
448 	info->desc = pci_alloc_consistent(rocker->pdev,
449 					  info->size * sizeof(*info->desc),
450 					  &info->mapaddr);
451 	if (!info->desc) {
452 		kfree(info->desc_info);
453 		return -ENOMEM;
454 	}
455 
456 	for (i = 0; i < info->size; i++)
457 		info->desc_info[i].desc = &info->desc[i];
458 
459 	rocker_write32(rocker, DMA_DESC_CTRL(info->type),
460 		       ROCKER_DMA_DESC_CTRL_RESET);
461 	rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
462 	rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
463 
464 	return 0;
465 }
466 
467 static void rocker_dma_ring_destroy(const struct rocker *rocker,
468 				    const struct rocker_dma_ring_info *info)
469 {
470 	rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
471 
472 	pci_free_consistent(rocker->pdev,
473 			    info->size * sizeof(struct rocker_desc),
474 			    info->desc, info->mapaddr);
475 	kfree(info->desc_info);
476 }
477 
478 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
479 					     struct rocker_dma_ring_info *info)
480 {
481 	int i;
482 
483 	BUG_ON(info->head || info->tail);
484 
485 	/* When ring is consumer, we need to advance head for each desc.
486 	 * That tells hw that the desc is ready to be used by it.
487 	 */
488 	for (i = 0; i < info->size - 1; i++)
489 		rocker_desc_head_set(rocker, info, &info->desc_info[i]);
490 	rocker_desc_commit(&info->desc_info[i]);
491 }
492 
493 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
494 				      const struct rocker_dma_ring_info *info,
495 				      int direction, size_t buf_size)
496 {
497 	struct pci_dev *pdev = rocker->pdev;
498 	int i;
499 	int err;
500 
501 	for (i = 0; i < info->size; i++) {
502 		struct rocker_desc_info *desc_info = &info->desc_info[i];
503 		struct rocker_desc *desc = &info->desc[i];
504 		dma_addr_t dma_handle;
505 		char *buf;
506 
507 		buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
508 		if (!buf) {
509 			err = -ENOMEM;
510 			goto rollback;
511 		}
512 
513 		dma_handle = pci_map_single(pdev, buf, buf_size, direction);
514 		if (pci_dma_mapping_error(pdev, dma_handle)) {
515 			kfree(buf);
516 			err = -EIO;
517 			goto rollback;
518 		}
519 
520 		desc_info->data = buf;
521 		desc_info->data_size = buf_size;
522 		dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
523 
524 		desc->buf_addr = dma_handle;
525 		desc->buf_size = buf_size;
526 	}
527 	return 0;
528 
529 rollback:
530 	for (i--; i >= 0; i--) {
531 		const struct rocker_desc_info *desc_info = &info->desc_info[i];
532 
533 		pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
534 				 desc_info->data_size, direction);
535 		kfree(desc_info->data);
536 	}
537 	return err;
538 }
539 
540 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
541 				      const struct rocker_dma_ring_info *info,
542 				      int direction)
543 {
544 	struct pci_dev *pdev = rocker->pdev;
545 	int i;
546 
547 	for (i = 0; i < info->size; i++) {
548 		const struct rocker_desc_info *desc_info = &info->desc_info[i];
549 		struct rocker_desc *desc = &info->desc[i];
550 
551 		desc->buf_addr = 0;
552 		desc->buf_size = 0;
553 		pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
554 				 desc_info->data_size, direction);
555 		kfree(desc_info->data);
556 	}
557 }
558 
559 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
560 {
561 	struct rocker_wait *wait;
562 
563 	wait = rocker_wait_create();
564 	if (!wait)
565 		return -ENOMEM;
566 	rocker_desc_cookie_ptr_set(desc_info, wait);
567 	return 0;
568 }
569 
570 static void
571 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
572 {
573 	struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
574 
575 	rocker_wait_destroy(wait);
576 }
577 
578 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
579 {
580 	const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
581 	int i;
582 	int err;
583 
584 	for (i = 0; i < cmd_ring->size; i++) {
585 		err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
586 		if (err)
587 			goto rollback;
588 	}
589 	return 0;
590 
591 rollback:
592 	for (i--; i >= 0; i--)
593 		rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
594 	return err;
595 }
596 
597 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
598 {
599 	const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
600 	int i;
601 
602 	for (i = 0; i < cmd_ring->size; i++)
603 		rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
604 }
605 
606 static int rocker_dma_rings_init(struct rocker *rocker)
607 {
608 	const struct pci_dev *pdev = rocker->pdev;
609 	int err;
610 
611 	err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
612 				     ROCKER_DMA_CMD_DEFAULT_SIZE,
613 				     &rocker->cmd_ring);
614 	if (err) {
615 		dev_err(&pdev->dev, "failed to create command dma ring\n");
616 		return err;
617 	}
618 
619 	spin_lock_init(&rocker->cmd_ring_lock);
620 
621 	err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
622 					 PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
623 	if (err) {
624 		dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
625 		goto err_dma_cmd_ring_bufs_alloc;
626 	}
627 
628 	err = rocker_dma_cmd_ring_waits_alloc(rocker);
629 	if (err) {
630 		dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
631 		goto err_dma_cmd_ring_waits_alloc;
632 	}
633 
634 	err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
635 				     ROCKER_DMA_EVENT_DEFAULT_SIZE,
636 				     &rocker->event_ring);
637 	if (err) {
638 		dev_err(&pdev->dev, "failed to create event dma ring\n");
639 		goto err_dma_event_ring_create;
640 	}
641 
642 	err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
643 					 PCI_DMA_FROMDEVICE, PAGE_SIZE);
644 	if (err) {
645 		dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
646 		goto err_dma_event_ring_bufs_alloc;
647 	}
648 	rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
649 	return 0;
650 
651 err_dma_event_ring_bufs_alloc:
652 	rocker_dma_ring_destroy(rocker, &rocker->event_ring);
653 err_dma_event_ring_create:
654 	rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
655 				  PCI_DMA_BIDIRECTIONAL);
656 err_dma_cmd_ring_waits_alloc:
657 	rocker_dma_cmd_ring_waits_free(rocker);
658 err_dma_cmd_ring_bufs_alloc:
659 	rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
660 	return err;
661 }
662 
663 static void rocker_dma_rings_fini(struct rocker *rocker)
664 {
665 	rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
666 				  PCI_DMA_BIDIRECTIONAL);
667 	rocker_dma_ring_destroy(rocker, &rocker->event_ring);
668 	rocker_dma_cmd_ring_waits_free(rocker);
669 	rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
670 				  PCI_DMA_BIDIRECTIONAL);
671 	rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
672 }
673 
674 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
675 				      struct rocker_desc_info *desc_info,
676 				      struct sk_buff *skb, size_t buf_len)
677 {
678 	const struct rocker *rocker = rocker_port->rocker;
679 	struct pci_dev *pdev = rocker->pdev;
680 	dma_addr_t dma_handle;
681 
682 	dma_handle = pci_map_single(pdev, skb->data, buf_len,
683 				    PCI_DMA_FROMDEVICE);
684 	if (pci_dma_mapping_error(pdev, dma_handle))
685 		return -EIO;
686 	if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
687 		goto tlv_put_failure;
688 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
689 		goto tlv_put_failure;
690 	return 0;
691 
692 tlv_put_failure:
693 	pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
694 	desc_info->tlv_size = 0;
695 	return -EMSGSIZE;
696 }
697 
698 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
699 {
700 	return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
701 }
702 
703 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
704 					struct rocker_desc_info *desc_info)
705 {
706 	struct net_device *dev = rocker_port->dev;
707 	struct sk_buff *skb;
708 	size_t buf_len = rocker_port_rx_buf_len(rocker_port);
709 	int err;
710 
711 	/* Ensure that hw will see tlv_size zero in case of an error.
712 	 * That tells hw to use another descriptor.
713 	 */
714 	rocker_desc_cookie_ptr_set(desc_info, NULL);
715 	desc_info->tlv_size = 0;
716 
717 	skb = netdev_alloc_skb_ip_align(dev, buf_len);
718 	if (!skb)
719 		return -ENOMEM;
720 	err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
721 	if (err) {
722 		dev_kfree_skb_any(skb);
723 		return err;
724 	}
725 	rocker_desc_cookie_ptr_set(desc_info, skb);
726 	return 0;
727 }
728 
729 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
730 					 const struct rocker_tlv **attrs)
731 {
732 	struct pci_dev *pdev = rocker->pdev;
733 	dma_addr_t dma_handle;
734 	size_t len;
735 
736 	if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
737 	    !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
738 		return;
739 	dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
740 	len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
741 	pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
742 }
743 
744 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
745 					const struct rocker_desc_info *desc_info)
746 {
747 	const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
748 	struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
749 
750 	if (!skb)
751 		return;
752 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
753 	rocker_dma_rx_ring_skb_unmap(rocker, attrs);
754 	dev_kfree_skb_any(skb);
755 }
756 
757 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
758 {
759 	const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
760 	const struct rocker *rocker = rocker_port->rocker;
761 	int i;
762 	int err;
763 
764 	for (i = 0; i < rx_ring->size; i++) {
765 		err = rocker_dma_rx_ring_skb_alloc(rocker_port,
766 						   &rx_ring->desc_info[i]);
767 		if (err)
768 			goto rollback;
769 	}
770 	return 0;
771 
772 rollback:
773 	for (i--; i >= 0; i--)
774 		rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
775 	return err;
776 }
777 
778 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
779 {
780 	const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
781 	const struct rocker *rocker = rocker_port->rocker;
782 	int i;
783 
784 	for (i = 0; i < rx_ring->size; i++)
785 		rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
786 }
787 
788 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
789 {
790 	struct rocker *rocker = rocker_port->rocker;
791 	int err;
792 
793 	err = rocker_dma_ring_create(rocker,
794 				     ROCKER_DMA_TX(rocker_port->port_number),
795 				     ROCKER_DMA_TX_DEFAULT_SIZE,
796 				     &rocker_port->tx_ring);
797 	if (err) {
798 		netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
799 		return err;
800 	}
801 
802 	err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
803 					 PCI_DMA_TODEVICE,
804 					 ROCKER_DMA_TX_DESC_SIZE);
805 	if (err) {
806 		netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
807 		goto err_dma_tx_ring_bufs_alloc;
808 	}
809 
810 	err = rocker_dma_ring_create(rocker,
811 				     ROCKER_DMA_RX(rocker_port->port_number),
812 				     ROCKER_DMA_RX_DEFAULT_SIZE,
813 				     &rocker_port->rx_ring);
814 	if (err) {
815 		netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
816 		goto err_dma_rx_ring_create;
817 	}
818 
819 	err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
820 					 PCI_DMA_BIDIRECTIONAL,
821 					 ROCKER_DMA_RX_DESC_SIZE);
822 	if (err) {
823 		netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
824 		goto err_dma_rx_ring_bufs_alloc;
825 	}
826 
827 	err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
828 	if (err) {
829 		netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
830 		goto err_dma_rx_ring_skbs_alloc;
831 	}
832 	rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
833 
834 	return 0;
835 
836 err_dma_rx_ring_skbs_alloc:
837 	rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
838 				  PCI_DMA_BIDIRECTIONAL);
839 err_dma_rx_ring_bufs_alloc:
840 	rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
841 err_dma_rx_ring_create:
842 	rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
843 				  PCI_DMA_TODEVICE);
844 err_dma_tx_ring_bufs_alloc:
845 	rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
846 	return err;
847 }
848 
849 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
850 {
851 	struct rocker *rocker = rocker_port->rocker;
852 
853 	rocker_dma_rx_ring_skbs_free(rocker_port);
854 	rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
855 				  PCI_DMA_BIDIRECTIONAL);
856 	rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
857 	rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
858 				  PCI_DMA_TODEVICE);
859 	rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
860 }
861 
862 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
863 				   bool enable)
864 {
865 	u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
866 
867 	if (enable)
868 		val |= 1ULL << rocker_port->pport;
869 	else
870 		val &= ~(1ULL << rocker_port->pport);
871 	rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
872 }
873 
874 /********************************
875  * Interrupt handler and helpers
876  ********************************/
877 
878 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
879 {
880 	struct rocker *rocker = dev_id;
881 	const struct rocker_desc_info *desc_info;
882 	struct rocker_wait *wait;
883 	u32 credits = 0;
884 
885 	spin_lock(&rocker->cmd_ring_lock);
886 	while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
887 		wait = rocker_desc_cookie_ptr_get(desc_info);
888 		if (wait->nowait) {
889 			rocker_desc_gen_clear(desc_info);
890 		} else {
891 			rocker_wait_wake_up(wait);
892 		}
893 		credits++;
894 	}
895 	spin_unlock(&rocker->cmd_ring_lock);
896 	rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
897 
898 	return IRQ_HANDLED;
899 }
900 
901 static void rocker_port_link_up(const struct rocker_port *rocker_port)
902 {
903 	netif_carrier_on(rocker_port->dev);
904 	netdev_info(rocker_port->dev, "Link is up\n");
905 }
906 
907 static void rocker_port_link_down(const struct rocker_port *rocker_port)
908 {
909 	netif_carrier_off(rocker_port->dev);
910 	netdev_info(rocker_port->dev, "Link is down\n");
911 }
912 
913 static int rocker_event_link_change(const struct rocker *rocker,
914 				    const struct rocker_tlv *info)
915 {
916 	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
917 	unsigned int port_number;
918 	bool link_up;
919 	struct rocker_port *rocker_port;
920 
921 	rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
922 	if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
923 	    !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
924 		return -EIO;
925 	port_number =
926 		rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
927 	link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
928 
929 	if (port_number >= rocker->port_count)
930 		return -EINVAL;
931 
932 	rocker_port = rocker->ports[port_number];
933 	if (netif_carrier_ok(rocker_port->dev) != link_up) {
934 		if (link_up)
935 			rocker_port_link_up(rocker_port);
936 		else
937 			rocker_port_link_down(rocker_port);
938 	}
939 
940 	return 0;
941 }
942 
943 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
944 					      const unsigned char *addr,
945 					      __be16 vlan_id);
946 
947 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
948 				      const struct rocker_tlv *info)
949 {
950 	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
951 	unsigned int port_number;
952 	struct rocker_port *rocker_port;
953 	const unsigned char *addr;
954 	__be16 vlan_id;
955 
956 	rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
957 	if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
958 	    !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
959 	    !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
960 		return -EIO;
961 	port_number =
962 		rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
963 	addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
964 	vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
965 
966 	if (port_number >= rocker->port_count)
967 		return -EINVAL;
968 
969 	rocker_port = rocker->ports[port_number];
970 	return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
971 }
972 
973 static int rocker_event_process(const struct rocker *rocker,
974 				const struct rocker_desc_info *desc_info)
975 {
976 	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
977 	const struct rocker_tlv *info;
978 	u16 type;
979 
980 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
981 	if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
982 	    !attrs[ROCKER_TLV_EVENT_INFO])
983 		return -EIO;
984 
985 	type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
986 	info = attrs[ROCKER_TLV_EVENT_INFO];
987 
988 	switch (type) {
989 	case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
990 		return rocker_event_link_change(rocker, info);
991 	case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
992 		return rocker_event_mac_vlan_seen(rocker, info);
993 	}
994 
995 	return -EOPNOTSUPP;
996 }
997 
998 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
999 {
1000 	struct rocker *rocker = dev_id;
1001 	const struct pci_dev *pdev = rocker->pdev;
1002 	const struct rocker_desc_info *desc_info;
1003 	u32 credits = 0;
1004 	int err;
1005 
1006 	while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1007 		err = rocker_desc_err(desc_info);
1008 		if (err) {
1009 			dev_err(&pdev->dev, "event desc received with err %d\n",
1010 				err);
1011 		} else {
1012 			err = rocker_event_process(rocker, desc_info);
1013 			if (err)
1014 				dev_err(&pdev->dev, "event processing failed with err %d\n",
1015 					err);
1016 		}
1017 		rocker_desc_gen_clear(desc_info);
1018 		rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1019 		credits++;
1020 	}
1021 	rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1022 
1023 	return IRQ_HANDLED;
1024 }
1025 
1026 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1027 {
1028 	struct rocker_port *rocker_port = dev_id;
1029 
1030 	napi_schedule(&rocker_port->napi_tx);
1031 	return IRQ_HANDLED;
1032 }
1033 
1034 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1035 {
1036 	struct rocker_port *rocker_port = dev_id;
1037 
1038 	napi_schedule(&rocker_port->napi_rx);
1039 	return IRQ_HANDLED;
1040 }
1041 
1042 /********************
1043  * Command interface
1044  ********************/
1045 
1046 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1047 		    rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1048 		    rocker_cmd_proc_cb_t process, void *process_priv)
1049 {
1050 	struct rocker *rocker = rocker_port->rocker;
1051 	struct rocker_desc_info *desc_info;
1052 	struct rocker_wait *wait;
1053 	unsigned long lock_flags;
1054 	int err;
1055 
1056 	spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1057 
1058 	desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1059 	if (!desc_info) {
1060 		spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1061 		return -EAGAIN;
1062 	}
1063 
1064 	wait = rocker_desc_cookie_ptr_get(desc_info);
1065 	rocker_wait_init(wait);
1066 	wait->nowait = nowait;
1067 
1068 	err = prepare(rocker_port, desc_info, prepare_priv);
1069 	if (err) {
1070 		spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1071 		return err;
1072 	}
1073 
1074 	rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1075 
1076 	spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1077 
1078 	if (nowait)
1079 		return 0;
1080 
1081 	if (!rocker_wait_event_timeout(wait, HZ / 10))
1082 		return -EIO;
1083 
1084 	err = rocker_desc_err(desc_info);
1085 	if (err)
1086 		return err;
1087 
1088 	if (process)
1089 		err = process(rocker_port, desc_info, process_priv);
1090 
1091 	rocker_desc_gen_clear(desc_info);
1092 	return err;
1093 }
1094 
1095 static int
1096 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1097 				  struct rocker_desc_info *desc_info,
1098 				  void *priv)
1099 {
1100 	struct rocker_tlv *cmd_info;
1101 
1102 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1103 			       ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1104 		return -EMSGSIZE;
1105 	cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1106 	if (!cmd_info)
1107 		return -EMSGSIZE;
1108 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1109 			       rocker_port->pport))
1110 		return -EMSGSIZE;
1111 	rocker_tlv_nest_end(desc_info, cmd_info);
1112 	return 0;
1113 }
1114 
1115 static int
1116 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1117 					  const struct rocker_desc_info *desc_info,
1118 					  void *priv)
1119 {
1120 	struct ethtool_link_ksettings *ecmd = priv;
1121 	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1122 	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1123 	u32 speed;
1124 	u8 duplex;
1125 	u8 autoneg;
1126 
1127 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1128 	if (!attrs[ROCKER_TLV_CMD_INFO])
1129 		return -EIO;
1130 
1131 	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1132 				attrs[ROCKER_TLV_CMD_INFO]);
1133 	if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1134 	    !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1135 	    !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1136 		return -EIO;
1137 
1138 	speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1139 	duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1140 	autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1141 
1142 	ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1143 	ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1144 
1145 	ecmd->base.phy_address = 0xff;
1146 	ecmd->base.port = PORT_TP;
1147 	ecmd->base.speed = speed;
1148 	ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1149 	ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1150 
1151 	return 0;
1152 }
1153 
1154 static int
1155 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1156 					  const struct rocker_desc_info *desc_info,
1157 					  void *priv)
1158 {
1159 	unsigned char *macaddr = priv;
1160 	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1161 	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1162 	const struct rocker_tlv *attr;
1163 
1164 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1165 	if (!attrs[ROCKER_TLV_CMD_INFO])
1166 		return -EIO;
1167 
1168 	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1169 				attrs[ROCKER_TLV_CMD_INFO]);
1170 	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1171 	if (!attr)
1172 		return -EIO;
1173 
1174 	if (rocker_tlv_len(attr) != ETH_ALEN)
1175 		return -EINVAL;
1176 
1177 	ether_addr_copy(macaddr, rocker_tlv_data(attr));
1178 	return 0;
1179 }
1180 
1181 static int
1182 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1183 				       const struct rocker_desc_info *desc_info,
1184 				       void *priv)
1185 {
1186 	u8 *p_mode = priv;
1187 	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1188 	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1189 	const struct rocker_tlv *attr;
1190 
1191 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1192 	if (!attrs[ROCKER_TLV_CMD_INFO])
1193 		return -EIO;
1194 
1195 	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1196 				attrs[ROCKER_TLV_CMD_INFO]);
1197 	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1198 	if (!attr)
1199 		return -EIO;
1200 
1201 	*p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1202 	return 0;
1203 }
1204 
1205 struct port_name {
1206 	char *buf;
1207 	size_t len;
1208 };
1209 
1210 static int
1211 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1212 					    const struct rocker_desc_info *desc_info,
1213 					    void *priv)
1214 {
1215 	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1216 	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1217 	struct port_name *name = priv;
1218 	const struct rocker_tlv *attr;
1219 	size_t i, j, len;
1220 	const char *str;
1221 
1222 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1223 	if (!attrs[ROCKER_TLV_CMD_INFO])
1224 		return -EIO;
1225 
1226 	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1227 				attrs[ROCKER_TLV_CMD_INFO]);
1228 	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1229 	if (!attr)
1230 		return -EIO;
1231 
1232 	len = min_t(size_t, rocker_tlv_len(attr), name->len);
1233 	str = rocker_tlv_data(attr);
1234 
1235 	/* make sure name only contains alphanumeric characters */
1236 	for (i = j = 0; i < len; ++i) {
1237 		if (isalnum(str[i])) {
1238 			name->buf[j] = str[i];
1239 			j++;
1240 		}
1241 	}
1242 
1243 	if (j == 0)
1244 		return -EIO;
1245 
1246 	name->buf[j] = '\0';
1247 
1248 	return 0;
1249 }
1250 
1251 static int
1252 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1253 					  struct rocker_desc_info *desc_info,
1254 					  void *priv)
1255 {
1256 	struct ethtool_link_ksettings *ecmd = priv;
1257 	struct rocker_tlv *cmd_info;
1258 
1259 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1260 			       ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1261 		return -EMSGSIZE;
1262 	cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1263 	if (!cmd_info)
1264 		return -EMSGSIZE;
1265 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1266 			       rocker_port->pport))
1267 		return -EMSGSIZE;
1268 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1269 			       ecmd->base.speed))
1270 		return -EMSGSIZE;
1271 	if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1272 			      ecmd->base.duplex))
1273 		return -EMSGSIZE;
1274 	if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1275 			      ecmd->base.autoneg))
1276 		return -EMSGSIZE;
1277 	rocker_tlv_nest_end(desc_info, cmd_info);
1278 	return 0;
1279 }
1280 
1281 static int
1282 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1283 					  struct rocker_desc_info *desc_info,
1284 					  void *priv)
1285 {
1286 	const unsigned char *macaddr = priv;
1287 	struct rocker_tlv *cmd_info;
1288 
1289 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1290 			       ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1291 		return -EMSGSIZE;
1292 	cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1293 	if (!cmd_info)
1294 		return -EMSGSIZE;
1295 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1296 			       rocker_port->pport))
1297 		return -EMSGSIZE;
1298 	if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1299 			   ETH_ALEN, macaddr))
1300 		return -EMSGSIZE;
1301 	rocker_tlv_nest_end(desc_info, cmd_info);
1302 	return 0;
1303 }
1304 
1305 static int
1306 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1307 				      struct rocker_desc_info *desc_info,
1308 				      void *priv)
1309 {
1310 	int mtu = *(int *)priv;
1311 	struct rocker_tlv *cmd_info;
1312 
1313 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1314 			       ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1315 		return -EMSGSIZE;
1316 	cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1317 	if (!cmd_info)
1318 		return -EMSGSIZE;
1319 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1320 			       rocker_port->pport))
1321 		return -EMSGSIZE;
1322 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1323 			       mtu))
1324 		return -EMSGSIZE;
1325 	rocker_tlv_nest_end(desc_info, cmd_info);
1326 	return 0;
1327 }
1328 
1329 static int
1330 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1331 				  struct rocker_desc_info *desc_info,
1332 				  void *priv)
1333 {
1334 	bool learning = *(bool *)priv;
1335 	struct rocker_tlv *cmd_info;
1336 
1337 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1338 			       ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1339 		return -EMSGSIZE;
1340 	cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1341 	if (!cmd_info)
1342 		return -EMSGSIZE;
1343 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1344 			       rocker_port->pport))
1345 		return -EMSGSIZE;
1346 	if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1347 			      learning))
1348 		return -EMSGSIZE;
1349 	rocker_tlv_nest_end(desc_info, cmd_info);
1350 	return 0;
1351 }
1352 
1353 static int
1354 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1355 				     struct ethtool_link_ksettings *ecmd)
1356 {
1357 	return rocker_cmd_exec(rocker_port, false,
1358 			       rocker_cmd_get_port_settings_prep, NULL,
1359 			       rocker_cmd_get_port_settings_ethtool_proc,
1360 			       ecmd);
1361 }
1362 
1363 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1364 						unsigned char *macaddr)
1365 {
1366 	return rocker_cmd_exec(rocker_port, false,
1367 			       rocker_cmd_get_port_settings_prep, NULL,
1368 			       rocker_cmd_get_port_settings_macaddr_proc,
1369 			       macaddr);
1370 }
1371 
1372 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1373 					     u8 *p_mode)
1374 {
1375 	return rocker_cmd_exec(rocker_port, false,
1376 			       rocker_cmd_get_port_settings_prep, NULL,
1377 			       rocker_cmd_get_port_settings_mode_proc, p_mode);
1378 }
1379 
1380 static int
1381 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1382 				     const struct ethtool_link_ksettings *ecmd)
1383 {
1384 	struct ethtool_link_ksettings copy_ecmd;
1385 
1386 	memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1387 
1388 	return rocker_cmd_exec(rocker_port, false,
1389 			       rocker_cmd_set_port_settings_ethtool_prep,
1390 			       &copy_ecmd, NULL, NULL);
1391 }
1392 
1393 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1394 						unsigned char *macaddr)
1395 {
1396 	return rocker_cmd_exec(rocker_port, false,
1397 			       rocker_cmd_set_port_settings_macaddr_prep,
1398 			       macaddr, NULL, NULL);
1399 }
1400 
1401 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1402 					    int mtu)
1403 {
1404 	return rocker_cmd_exec(rocker_port, false,
1405 			       rocker_cmd_set_port_settings_mtu_prep,
1406 			       &mtu, NULL, NULL);
1407 }
1408 
1409 int rocker_port_set_learning(struct rocker_port *rocker_port,
1410 			     bool learning)
1411 {
1412 	return rocker_cmd_exec(rocker_port, false,
1413 			       rocker_cmd_set_port_learning_prep,
1414 			       &learning, NULL, NULL);
1415 }
1416 
1417 /**********************
1418  * Worlds manipulation
1419  **********************/
1420 
1421 static struct rocker_world_ops *rocker_world_ops[] = {
1422 	&rocker_ofdpa_ops,
1423 };
1424 
1425 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1426 
1427 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1428 {
1429 	int i;
1430 
1431 	for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1432 		if (rocker_world_ops[i]->mode == mode)
1433 			return rocker_world_ops[i];
1434 	return NULL;
1435 }
1436 
1437 static int rocker_world_init(struct rocker *rocker, u8 mode)
1438 {
1439 	struct rocker_world_ops *wops;
1440 	int err;
1441 
1442 	wops = rocker_world_ops_find(mode);
1443 	if (!wops) {
1444 		dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1445 			mode);
1446 		return -EINVAL;
1447 	}
1448 	rocker->wops = wops;
1449 	rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1450 	if (!rocker->wpriv)
1451 		return -ENOMEM;
1452 	if (!wops->init)
1453 		return 0;
1454 	err = wops->init(rocker);
1455 	if (err)
1456 		kfree(rocker->wpriv);
1457 	return err;
1458 }
1459 
1460 static void rocker_world_fini(struct rocker *rocker)
1461 {
1462 	struct rocker_world_ops *wops = rocker->wops;
1463 
1464 	if (!wops || !wops->fini)
1465 		return;
1466 	wops->fini(rocker);
1467 	kfree(rocker->wpriv);
1468 }
1469 
1470 static int rocker_world_check_init(struct rocker_port *rocker_port)
1471 {
1472 	struct rocker *rocker = rocker_port->rocker;
1473 	u8 mode;
1474 	int err;
1475 
1476 	err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1477 	if (err) {
1478 		dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1479 		return err;
1480 	}
1481 	if (rocker->wops) {
1482 		if (rocker->wops->mode != mode) {
1483 			dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1484 			return -EINVAL;
1485 		}
1486 		return 0;
1487 	}
1488 	return rocker_world_init(rocker, mode);
1489 }
1490 
1491 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1492 {
1493 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1494 	int err;
1495 
1496 	rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1497 	if (!rocker_port->wpriv)
1498 		return -ENOMEM;
1499 	if (!wops->port_pre_init)
1500 		return 0;
1501 	err = wops->port_pre_init(rocker_port);
1502 	if (err)
1503 		kfree(rocker_port->wpriv);
1504 	return 0;
1505 }
1506 
1507 static int rocker_world_port_init(struct rocker_port *rocker_port)
1508 {
1509 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1510 
1511 	if (!wops->port_init)
1512 		return 0;
1513 	return wops->port_init(rocker_port);
1514 }
1515 
1516 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1517 {
1518 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1519 
1520 	if (!wops->port_fini)
1521 		return;
1522 	wops->port_fini(rocker_port);
1523 }
1524 
1525 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1526 {
1527 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1528 
1529 	if (!wops->port_post_fini)
1530 		return;
1531 	wops->port_post_fini(rocker_port);
1532 	kfree(rocker_port->wpriv);
1533 }
1534 
1535 static int rocker_world_port_open(struct rocker_port *rocker_port)
1536 {
1537 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1538 
1539 	if (!wops->port_open)
1540 		return 0;
1541 	return wops->port_open(rocker_port);
1542 }
1543 
1544 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1545 {
1546 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1547 
1548 	if (!wops->port_stop)
1549 		return;
1550 	wops->port_stop(rocker_port);
1551 }
1552 
1553 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1554 						u8 state,
1555 						struct switchdev_trans *trans)
1556 {
1557 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1558 
1559 	if (!wops->port_attr_stp_state_set)
1560 		return -EOPNOTSUPP;
1561 
1562 	if (switchdev_trans_ph_prepare(trans))
1563 		return 0;
1564 
1565 	return wops->port_attr_stp_state_set(rocker_port, state);
1566 }
1567 
1568 static int
1569 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1570 						rocker_port,
1571 						unsigned long *
1572 						p_brport_flags_support)
1573 {
1574 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1575 
1576 	if (!wops->port_attr_bridge_flags_support_get)
1577 		return -EOPNOTSUPP;
1578 	return wops->port_attr_bridge_flags_support_get(rocker_port,
1579 							p_brport_flags_support);
1580 }
1581 
1582 static int
1583 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1584 					    unsigned long brport_flags,
1585 					    struct switchdev_trans *trans)
1586 {
1587 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1588 	unsigned long brport_flags_s;
1589 	int err;
1590 
1591 	if (!wops->port_attr_bridge_flags_set)
1592 		return -EOPNOTSUPP;
1593 
1594 	err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1595 							      &brport_flags_s);
1596 	if (err)
1597 		return err;
1598 
1599 	if (brport_flags & ~brport_flags_s)
1600 		return -EINVAL;
1601 
1602 	return 0;
1603 }
1604 
1605 static int
1606 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1607 					unsigned long brport_flags,
1608 					struct switchdev_trans *trans)
1609 {
1610 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1611 
1612 	if (!wops->port_attr_bridge_flags_set)
1613 		return -EOPNOTSUPP;
1614 
1615 	if (switchdev_trans_ph_prepare(trans))
1616 		return 0;
1617 
1618 	return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1619 						trans);
1620 }
1621 
1622 static int
1623 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1624 					      u32 ageing_time,
1625 					      struct switchdev_trans *trans)
1626 
1627 {
1628 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1629 
1630 	if (!wops->port_attr_bridge_ageing_time_set)
1631 		return -EOPNOTSUPP;
1632 
1633 	if (switchdev_trans_ph_prepare(trans))
1634 		return 0;
1635 
1636 	return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1637 						      trans);
1638 }
1639 
1640 static int
1641 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1642 			       const struct switchdev_obj_port_vlan *vlan,
1643 			       struct switchdev_trans *trans)
1644 {
1645 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1646 
1647 	if (!wops->port_obj_vlan_add)
1648 		return -EOPNOTSUPP;
1649 
1650 	if (switchdev_trans_ph_prepare(trans))
1651 		return 0;
1652 
1653 	return wops->port_obj_vlan_add(rocker_port, vlan);
1654 }
1655 
1656 static int
1657 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1658 			       const struct switchdev_obj_port_vlan *vlan)
1659 {
1660 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1661 
1662 	if (netif_is_bridge_master(vlan->obj.orig_dev))
1663 		return -EOPNOTSUPP;
1664 
1665 	if (!wops->port_obj_vlan_del)
1666 		return -EOPNOTSUPP;
1667 	return wops->port_obj_vlan_del(rocker_port, vlan);
1668 }
1669 
1670 static int
1671 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1672 			  struct switchdev_notifier_fdb_info *info)
1673 {
1674 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1675 
1676 	if (!wops->port_obj_fdb_add)
1677 		return -EOPNOTSUPP;
1678 
1679 	return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1680 }
1681 
1682 static int
1683 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1684 			  struct switchdev_notifier_fdb_info *info)
1685 {
1686 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1687 
1688 	if (!wops->port_obj_fdb_del)
1689 		return -EOPNOTSUPP;
1690 	return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1691 }
1692 
1693 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1694 					   struct net_device *master)
1695 {
1696 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1697 
1698 	if (!wops->port_master_linked)
1699 		return -EOPNOTSUPP;
1700 	return wops->port_master_linked(rocker_port, master);
1701 }
1702 
1703 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1704 					     struct net_device *master)
1705 {
1706 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1707 
1708 	if (!wops->port_master_unlinked)
1709 		return -EOPNOTSUPP;
1710 	return wops->port_master_unlinked(rocker_port, master);
1711 }
1712 
1713 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1714 					  struct neighbour *n)
1715 {
1716 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1717 
1718 	if (!wops->port_neigh_update)
1719 		return -EOPNOTSUPP;
1720 	return wops->port_neigh_update(rocker_port, n);
1721 }
1722 
1723 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1724 					   struct neighbour *n)
1725 {
1726 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1727 
1728 	if (!wops->port_neigh_destroy)
1729 		return -EOPNOTSUPP;
1730 	return wops->port_neigh_destroy(rocker_port, n);
1731 }
1732 
1733 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1734 					      const unsigned char *addr,
1735 					      __be16 vlan_id)
1736 {
1737 	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1738 
1739 	if (!wops->port_ev_mac_vlan_seen)
1740 		return -EOPNOTSUPP;
1741 	return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1742 }
1743 
1744 static int rocker_world_fib4_add(struct rocker *rocker,
1745 				 const struct fib_entry_notifier_info *fen_info)
1746 {
1747 	struct rocker_world_ops *wops = rocker->wops;
1748 
1749 	if (!wops->fib4_add)
1750 		return 0;
1751 	return wops->fib4_add(rocker, fen_info);
1752 }
1753 
1754 static int rocker_world_fib4_del(struct rocker *rocker,
1755 				 const struct fib_entry_notifier_info *fen_info)
1756 {
1757 	struct rocker_world_ops *wops = rocker->wops;
1758 
1759 	if (!wops->fib4_del)
1760 		return 0;
1761 	return wops->fib4_del(rocker, fen_info);
1762 }
1763 
1764 static void rocker_world_fib4_abort(struct rocker *rocker)
1765 {
1766 	struct rocker_world_ops *wops = rocker->wops;
1767 
1768 	if (wops->fib4_abort)
1769 		wops->fib4_abort(rocker);
1770 }
1771 
1772 /*****************
1773  * Net device ops
1774  *****************/
1775 
1776 static int rocker_port_open(struct net_device *dev)
1777 {
1778 	struct rocker_port *rocker_port = netdev_priv(dev);
1779 	int err;
1780 
1781 	err = rocker_port_dma_rings_init(rocker_port);
1782 	if (err)
1783 		return err;
1784 
1785 	err = request_irq(rocker_msix_tx_vector(rocker_port),
1786 			  rocker_tx_irq_handler, 0,
1787 			  rocker_driver_name, rocker_port);
1788 	if (err) {
1789 		netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1790 		goto err_request_tx_irq;
1791 	}
1792 
1793 	err = request_irq(rocker_msix_rx_vector(rocker_port),
1794 			  rocker_rx_irq_handler, 0,
1795 			  rocker_driver_name, rocker_port);
1796 	if (err) {
1797 		netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1798 		goto err_request_rx_irq;
1799 	}
1800 
1801 	err = rocker_world_port_open(rocker_port);
1802 	if (err) {
1803 		netdev_err(rocker_port->dev, "cannot open port in world\n");
1804 		goto err_world_port_open;
1805 	}
1806 
1807 	napi_enable(&rocker_port->napi_tx);
1808 	napi_enable(&rocker_port->napi_rx);
1809 	if (!dev->proto_down)
1810 		rocker_port_set_enable(rocker_port, true);
1811 	netif_start_queue(dev);
1812 	return 0;
1813 
1814 err_world_port_open:
1815 	free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1816 err_request_rx_irq:
1817 	free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1818 err_request_tx_irq:
1819 	rocker_port_dma_rings_fini(rocker_port);
1820 	return err;
1821 }
1822 
1823 static int rocker_port_stop(struct net_device *dev)
1824 {
1825 	struct rocker_port *rocker_port = netdev_priv(dev);
1826 
1827 	netif_stop_queue(dev);
1828 	rocker_port_set_enable(rocker_port, false);
1829 	napi_disable(&rocker_port->napi_rx);
1830 	napi_disable(&rocker_port->napi_tx);
1831 	rocker_world_port_stop(rocker_port);
1832 	free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1833 	free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1834 	rocker_port_dma_rings_fini(rocker_port);
1835 
1836 	return 0;
1837 }
1838 
1839 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1840 				       const struct rocker_desc_info *desc_info)
1841 {
1842 	const struct rocker *rocker = rocker_port->rocker;
1843 	struct pci_dev *pdev = rocker->pdev;
1844 	const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1845 	struct rocker_tlv *attr;
1846 	int rem;
1847 
1848 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1849 	if (!attrs[ROCKER_TLV_TX_FRAGS])
1850 		return;
1851 	rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1852 		const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1853 		dma_addr_t dma_handle;
1854 		size_t len;
1855 
1856 		if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1857 			continue;
1858 		rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1859 					attr);
1860 		if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1861 		    !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1862 			continue;
1863 		dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1864 		len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1865 		pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
1866 	}
1867 }
1868 
1869 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1870 				       struct rocker_desc_info *desc_info,
1871 				       char *buf, size_t buf_len)
1872 {
1873 	const struct rocker *rocker = rocker_port->rocker;
1874 	struct pci_dev *pdev = rocker->pdev;
1875 	dma_addr_t dma_handle;
1876 	struct rocker_tlv *frag;
1877 
1878 	dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
1879 	if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
1880 		if (net_ratelimit())
1881 			netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1882 		return -EIO;
1883 	}
1884 	frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1885 	if (!frag)
1886 		goto unmap_frag;
1887 	if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1888 			       dma_handle))
1889 		goto nest_cancel;
1890 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1891 			       buf_len))
1892 		goto nest_cancel;
1893 	rocker_tlv_nest_end(desc_info, frag);
1894 	return 0;
1895 
1896 nest_cancel:
1897 	rocker_tlv_nest_cancel(desc_info, frag);
1898 unmap_frag:
1899 	pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1900 	return -EMSGSIZE;
1901 }
1902 
1903 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1904 {
1905 	struct rocker_port *rocker_port = netdev_priv(dev);
1906 	struct rocker *rocker = rocker_port->rocker;
1907 	struct rocker_desc_info *desc_info;
1908 	struct rocker_tlv *frags;
1909 	int i;
1910 	int err;
1911 
1912 	desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1913 	if (unlikely(!desc_info)) {
1914 		if (net_ratelimit())
1915 			netdev_err(dev, "tx ring full when queue awake\n");
1916 		return NETDEV_TX_BUSY;
1917 	}
1918 
1919 	rocker_desc_cookie_ptr_set(desc_info, skb);
1920 
1921 	frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1922 	if (!frags)
1923 		goto out;
1924 	err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1925 					  skb->data, skb_headlen(skb));
1926 	if (err)
1927 		goto nest_cancel;
1928 	if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1929 		err = skb_linearize(skb);
1930 		if (err)
1931 			goto unmap_frags;
1932 	}
1933 
1934 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1935 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1936 
1937 		err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1938 						  skb_frag_address(frag),
1939 						  skb_frag_size(frag));
1940 		if (err)
1941 			goto unmap_frags;
1942 	}
1943 	rocker_tlv_nest_end(desc_info, frags);
1944 
1945 	rocker_desc_gen_clear(desc_info);
1946 	rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1947 
1948 	desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1949 	if (!desc_info)
1950 		netif_stop_queue(dev);
1951 
1952 	return NETDEV_TX_OK;
1953 
1954 unmap_frags:
1955 	rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1956 nest_cancel:
1957 	rocker_tlv_nest_cancel(desc_info, frags);
1958 out:
1959 	dev_kfree_skb(skb);
1960 	dev->stats.tx_dropped++;
1961 
1962 	return NETDEV_TX_OK;
1963 }
1964 
1965 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1966 {
1967 	struct sockaddr *addr = p;
1968 	struct rocker_port *rocker_port = netdev_priv(dev);
1969 	int err;
1970 
1971 	if (!is_valid_ether_addr(addr->sa_data))
1972 		return -EADDRNOTAVAIL;
1973 
1974 	err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1975 	if (err)
1976 		return err;
1977 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1978 	return 0;
1979 }
1980 
1981 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1982 {
1983 	struct rocker_port *rocker_port = netdev_priv(dev);
1984 	int running = netif_running(dev);
1985 	int err;
1986 
1987 	if (running)
1988 		rocker_port_stop(dev);
1989 
1990 	netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1991 	dev->mtu = new_mtu;
1992 
1993 	err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1994 	if (err)
1995 		return err;
1996 
1997 	if (running)
1998 		err = rocker_port_open(dev);
1999 
2000 	return err;
2001 }
2002 
2003 static int rocker_port_get_phys_port_name(struct net_device *dev,
2004 					  char *buf, size_t len)
2005 {
2006 	struct rocker_port *rocker_port = netdev_priv(dev);
2007 	struct port_name name = { .buf = buf, .len = len };
2008 	int err;
2009 
2010 	err = rocker_cmd_exec(rocker_port, false,
2011 			      rocker_cmd_get_port_settings_prep, NULL,
2012 			      rocker_cmd_get_port_settings_phys_name_proc,
2013 			      &name);
2014 
2015 	return err ? -EOPNOTSUPP : 0;
2016 }
2017 
2018 static int rocker_port_change_proto_down(struct net_device *dev,
2019 					 bool proto_down)
2020 {
2021 	struct rocker_port *rocker_port = netdev_priv(dev);
2022 
2023 	if (rocker_port->dev->flags & IFF_UP)
2024 		rocker_port_set_enable(rocker_port, !proto_down);
2025 	rocker_port->dev->proto_down = proto_down;
2026 	return 0;
2027 }
2028 
2029 static void rocker_port_neigh_destroy(struct net_device *dev,
2030 				      struct neighbour *n)
2031 {
2032 	struct rocker_port *rocker_port = netdev_priv(n->dev);
2033 	int err;
2034 
2035 	err = rocker_world_port_neigh_destroy(rocker_port, n);
2036 	if (err)
2037 		netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2038 			    err);
2039 }
2040 
2041 static int rocker_port_get_port_parent_id(struct net_device *dev,
2042 					  struct netdev_phys_item_id *ppid)
2043 {
2044 	const struct rocker_port *rocker_port = netdev_priv(dev);
2045 	const struct rocker *rocker = rocker_port->rocker;
2046 
2047 	ppid->id_len = sizeof(rocker->hw.id);
2048 	memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2049 
2050 	return 0;
2051 }
2052 
2053 static const struct net_device_ops rocker_port_netdev_ops = {
2054 	.ndo_open			= rocker_port_open,
2055 	.ndo_stop			= rocker_port_stop,
2056 	.ndo_start_xmit			= rocker_port_xmit,
2057 	.ndo_set_mac_address		= rocker_port_set_mac_address,
2058 	.ndo_change_mtu			= rocker_port_change_mtu,
2059 	.ndo_get_phys_port_name		= rocker_port_get_phys_port_name,
2060 	.ndo_change_proto_down		= rocker_port_change_proto_down,
2061 	.ndo_neigh_destroy		= rocker_port_neigh_destroy,
2062 	.ndo_get_port_parent_id		= rocker_port_get_port_parent_id,
2063 };
2064 
2065 /********************
2066  * swdev interface
2067  ********************/
2068 
2069 static int rocker_port_attr_set(struct net_device *dev,
2070 				const struct switchdev_attr *attr,
2071 				struct switchdev_trans *trans)
2072 {
2073 	struct rocker_port *rocker_port = netdev_priv(dev);
2074 	int err = 0;
2075 
2076 	switch (attr->id) {
2077 	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2078 		err = rocker_world_port_attr_stp_state_set(rocker_port,
2079 							   attr->u.stp_state,
2080 							   trans);
2081 		break;
2082 	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2083 		err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2084 							      attr->u.brport_flags,
2085 							      trans);
2086 		break;
2087 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2088 		err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2089 							      attr->u.brport_flags,
2090 							      trans);
2091 		break;
2092 	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2093 		err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2094 								    attr->u.ageing_time,
2095 								    trans);
2096 		break;
2097 	default:
2098 		err = -EOPNOTSUPP;
2099 		break;
2100 	}
2101 
2102 	return err;
2103 }
2104 
2105 static int rocker_port_obj_add(struct net_device *dev,
2106 			       const struct switchdev_obj *obj,
2107 			       struct switchdev_trans *trans)
2108 {
2109 	struct rocker_port *rocker_port = netdev_priv(dev);
2110 	int err = 0;
2111 
2112 	switch (obj->id) {
2113 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
2114 		err = rocker_world_port_obj_vlan_add(rocker_port,
2115 						     SWITCHDEV_OBJ_PORT_VLAN(obj),
2116 						     trans);
2117 		break;
2118 	default:
2119 		err = -EOPNOTSUPP;
2120 		break;
2121 	}
2122 
2123 	return err;
2124 }
2125 
2126 static int rocker_port_obj_del(struct net_device *dev,
2127 			       const struct switchdev_obj *obj)
2128 {
2129 	struct rocker_port *rocker_port = netdev_priv(dev);
2130 	int err = 0;
2131 
2132 	switch (obj->id) {
2133 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
2134 		err = rocker_world_port_obj_vlan_del(rocker_port,
2135 						     SWITCHDEV_OBJ_PORT_VLAN(obj));
2136 		break;
2137 	default:
2138 		err = -EOPNOTSUPP;
2139 		break;
2140 	}
2141 
2142 	return err;
2143 }
2144 
2145 struct rocker_fib_event_work {
2146 	struct work_struct work;
2147 	union {
2148 		struct fib_entry_notifier_info fen_info;
2149 		struct fib_rule_notifier_info fr_info;
2150 	};
2151 	struct rocker *rocker;
2152 	unsigned long event;
2153 };
2154 
2155 static void rocker_router_fib_event_work(struct work_struct *work)
2156 {
2157 	struct rocker_fib_event_work *fib_work =
2158 		container_of(work, struct rocker_fib_event_work, work);
2159 	struct rocker *rocker = fib_work->rocker;
2160 	struct fib_rule *rule;
2161 	int err;
2162 
2163 	/* Protect internal structures from changes */
2164 	rtnl_lock();
2165 	switch (fib_work->event) {
2166 	case FIB_EVENT_ENTRY_ADD:
2167 		err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2168 		if (err)
2169 			rocker_world_fib4_abort(rocker);
2170 		fib_info_put(fib_work->fen_info.fi);
2171 		break;
2172 	case FIB_EVENT_ENTRY_DEL:
2173 		rocker_world_fib4_del(rocker, &fib_work->fen_info);
2174 		fib_info_put(fib_work->fen_info.fi);
2175 		break;
2176 	case FIB_EVENT_RULE_ADD: /* fall through */
2177 	case FIB_EVENT_RULE_DEL:
2178 		rule = fib_work->fr_info.rule;
2179 		if (!fib4_rule_default(rule))
2180 			rocker_world_fib4_abort(rocker);
2181 		fib_rule_put(rule);
2182 		break;
2183 	}
2184 	rtnl_unlock();
2185 	kfree(fib_work);
2186 }
2187 
2188 /* Called with rcu_read_lock() */
2189 static int rocker_router_fib_event(struct notifier_block *nb,
2190 				   unsigned long event, void *ptr)
2191 {
2192 	struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2193 	struct rocker_fib_event_work *fib_work;
2194 	struct fib_notifier_info *info = ptr;
2195 
2196 	if (info->family != AF_INET)
2197 		return NOTIFY_DONE;
2198 
2199 	fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2200 	if (WARN_ON(!fib_work))
2201 		return NOTIFY_BAD;
2202 
2203 	INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2204 	fib_work->rocker = rocker;
2205 	fib_work->event = event;
2206 
2207 	switch (event) {
2208 	case FIB_EVENT_ENTRY_ADD: /* fall through */
2209 	case FIB_EVENT_ENTRY_DEL:
2210 		if (info->family == AF_INET) {
2211 			struct fib_entry_notifier_info *fen_info = ptr;
2212 
2213 			if (fen_info->fi->fib_nh_is_v6) {
2214 				NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2215 				return notifier_from_errno(-EINVAL);
2216 			}
2217 		}
2218 
2219 		memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2220 		/* Take referece on fib_info to prevent it from being
2221 		 * freed while work is queued. Release it afterwards.
2222 		 */
2223 		fib_info_hold(fib_work->fen_info.fi);
2224 		break;
2225 	case FIB_EVENT_RULE_ADD: /* fall through */
2226 	case FIB_EVENT_RULE_DEL:
2227 		memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2228 		fib_rule_get(fib_work->fr_info.rule);
2229 		break;
2230 	}
2231 
2232 	queue_work(rocker->rocker_owq, &fib_work->work);
2233 
2234 	return NOTIFY_DONE;
2235 }
2236 
2237 /********************
2238  * ethtool interface
2239  ********************/
2240 
2241 static int
2242 rocker_port_get_link_ksettings(struct net_device *dev,
2243 			       struct ethtool_link_ksettings *ecmd)
2244 {
2245 	struct rocker_port *rocker_port = netdev_priv(dev);
2246 
2247 	return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2248 }
2249 
2250 static int
2251 rocker_port_set_link_ksettings(struct net_device *dev,
2252 			       const struct ethtool_link_ksettings *ecmd)
2253 {
2254 	struct rocker_port *rocker_port = netdev_priv(dev);
2255 
2256 	return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2257 }
2258 
2259 static void rocker_port_get_drvinfo(struct net_device *dev,
2260 				    struct ethtool_drvinfo *drvinfo)
2261 {
2262 	strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2263 	strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2264 }
2265 
2266 static struct rocker_port_stats {
2267 	char str[ETH_GSTRING_LEN];
2268 	int type;
2269 } rocker_port_stats[] = {
2270 	{ "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2271 	{ "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2272 	{ "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2273 	{ "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2274 
2275 	{ "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2276 	{ "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2277 	{ "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2278 	{ "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2279 };
2280 
2281 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2282 
2283 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2284 				    u8 *data)
2285 {
2286 	u8 *p = data;
2287 	int i;
2288 
2289 	switch (stringset) {
2290 	case ETH_SS_STATS:
2291 		for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2292 			memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2293 			p += ETH_GSTRING_LEN;
2294 		}
2295 		break;
2296 	}
2297 }
2298 
2299 static int
2300 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2301 			       struct rocker_desc_info *desc_info,
2302 			       void *priv)
2303 {
2304 	struct rocker_tlv *cmd_stats;
2305 
2306 	if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2307 			       ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2308 		return -EMSGSIZE;
2309 
2310 	cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2311 	if (!cmd_stats)
2312 		return -EMSGSIZE;
2313 
2314 	if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2315 			       rocker_port->pport))
2316 		return -EMSGSIZE;
2317 
2318 	rocker_tlv_nest_end(desc_info, cmd_stats);
2319 
2320 	return 0;
2321 }
2322 
2323 static int
2324 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2325 				       const struct rocker_desc_info *desc_info,
2326 				       void *priv)
2327 {
2328 	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2329 	const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2330 	const struct rocker_tlv *pattr;
2331 	u32 pport;
2332 	u64 *data = priv;
2333 	int i;
2334 
2335 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2336 
2337 	if (!attrs[ROCKER_TLV_CMD_INFO])
2338 		return -EIO;
2339 
2340 	rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2341 				attrs[ROCKER_TLV_CMD_INFO]);
2342 
2343 	if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2344 		return -EIO;
2345 
2346 	pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2347 	if (pport != rocker_port->pport)
2348 		return -EIO;
2349 
2350 	for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2351 		pattr = stats_attrs[rocker_port_stats[i].type];
2352 		if (!pattr)
2353 			continue;
2354 
2355 		data[i] = rocker_tlv_get_u64(pattr);
2356 	}
2357 
2358 	return 0;
2359 }
2360 
2361 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2362 					     void *priv)
2363 {
2364 	return rocker_cmd_exec(rocker_port, false,
2365 			       rocker_cmd_get_port_stats_prep, NULL,
2366 			       rocker_cmd_get_port_stats_ethtool_proc,
2367 			       priv);
2368 }
2369 
2370 static void rocker_port_get_stats(struct net_device *dev,
2371 				  struct ethtool_stats *stats, u64 *data)
2372 {
2373 	struct rocker_port *rocker_port = netdev_priv(dev);
2374 
2375 	if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2376 		int i;
2377 
2378 		for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2379 			data[i] = 0;
2380 	}
2381 }
2382 
2383 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2384 {
2385 	switch (sset) {
2386 	case ETH_SS_STATS:
2387 		return ROCKER_PORT_STATS_LEN;
2388 	default:
2389 		return -EOPNOTSUPP;
2390 	}
2391 }
2392 
2393 static const struct ethtool_ops rocker_port_ethtool_ops = {
2394 	.get_drvinfo		= rocker_port_get_drvinfo,
2395 	.get_link		= ethtool_op_get_link,
2396 	.get_strings		= rocker_port_get_strings,
2397 	.get_ethtool_stats	= rocker_port_get_stats,
2398 	.get_sset_count		= rocker_port_get_sset_count,
2399 	.get_link_ksettings	= rocker_port_get_link_ksettings,
2400 	.set_link_ksettings	= rocker_port_set_link_ksettings,
2401 };
2402 
2403 /*****************
2404  * NAPI interface
2405  *****************/
2406 
2407 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2408 {
2409 	return container_of(napi, struct rocker_port, napi_tx);
2410 }
2411 
2412 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2413 {
2414 	struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2415 	const struct rocker *rocker = rocker_port->rocker;
2416 	const struct rocker_desc_info *desc_info;
2417 	u32 credits = 0;
2418 	int err;
2419 
2420 	/* Cleanup tx descriptors */
2421 	while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2422 		struct sk_buff *skb;
2423 
2424 		err = rocker_desc_err(desc_info);
2425 		if (err && net_ratelimit())
2426 			netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2427 				   err);
2428 		rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2429 
2430 		skb = rocker_desc_cookie_ptr_get(desc_info);
2431 		if (err == 0) {
2432 			rocker_port->dev->stats.tx_packets++;
2433 			rocker_port->dev->stats.tx_bytes += skb->len;
2434 		} else {
2435 			rocker_port->dev->stats.tx_errors++;
2436 		}
2437 
2438 		dev_kfree_skb_any(skb);
2439 		credits++;
2440 	}
2441 
2442 	if (credits && netif_queue_stopped(rocker_port->dev))
2443 		netif_wake_queue(rocker_port->dev);
2444 
2445 	napi_complete(napi);
2446 	rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2447 
2448 	return 0;
2449 }
2450 
2451 static int rocker_port_rx_proc(const struct rocker *rocker,
2452 			       const struct rocker_port *rocker_port,
2453 			       struct rocker_desc_info *desc_info)
2454 {
2455 	const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2456 	struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2457 	size_t rx_len;
2458 	u16 rx_flags = 0;
2459 
2460 	if (!skb)
2461 		return -ENOENT;
2462 
2463 	rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2464 	if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2465 		return -EINVAL;
2466 	if (attrs[ROCKER_TLV_RX_FLAGS])
2467 		rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2468 
2469 	rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2470 
2471 	rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2472 	skb_put(skb, rx_len);
2473 	skb->protocol = eth_type_trans(skb, rocker_port->dev);
2474 
2475 	if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2476 		skb->offload_fwd_mark = 1;
2477 
2478 	rocker_port->dev->stats.rx_packets++;
2479 	rocker_port->dev->stats.rx_bytes += skb->len;
2480 
2481 	netif_receive_skb(skb);
2482 
2483 	return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2484 }
2485 
2486 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2487 {
2488 	return container_of(napi, struct rocker_port, napi_rx);
2489 }
2490 
2491 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2492 {
2493 	struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2494 	const struct rocker *rocker = rocker_port->rocker;
2495 	struct rocker_desc_info *desc_info;
2496 	u32 credits = 0;
2497 	int err;
2498 
2499 	/* Process rx descriptors */
2500 	while (credits < budget &&
2501 	       (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2502 		err = rocker_desc_err(desc_info);
2503 		if (err) {
2504 			if (net_ratelimit())
2505 				netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2506 					   err);
2507 		} else {
2508 			err = rocker_port_rx_proc(rocker, rocker_port,
2509 						  desc_info);
2510 			if (err && net_ratelimit())
2511 				netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2512 					   err);
2513 		}
2514 		if (err)
2515 			rocker_port->dev->stats.rx_errors++;
2516 
2517 		rocker_desc_gen_clear(desc_info);
2518 		rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2519 		credits++;
2520 	}
2521 
2522 	if (credits < budget)
2523 		napi_complete_done(napi, credits);
2524 
2525 	rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2526 
2527 	return credits;
2528 }
2529 
2530 /*****************
2531  * PCI driver ops
2532  *****************/
2533 
2534 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2535 {
2536 	const struct rocker *rocker = rocker_port->rocker;
2537 	u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2538 	bool link_up;
2539 
2540 	link_up = link_status & (1 << rocker_port->pport);
2541 	if (link_up)
2542 		netif_carrier_on(rocker_port->dev);
2543 	else
2544 		netif_carrier_off(rocker_port->dev);
2545 }
2546 
2547 static void rocker_remove_ports(struct rocker *rocker)
2548 {
2549 	struct rocker_port *rocker_port;
2550 	int i;
2551 
2552 	for (i = 0; i < rocker->port_count; i++) {
2553 		rocker_port = rocker->ports[i];
2554 		if (!rocker_port)
2555 			continue;
2556 		rocker_world_port_fini(rocker_port);
2557 		unregister_netdev(rocker_port->dev);
2558 		rocker_world_port_post_fini(rocker_port);
2559 		free_netdev(rocker_port->dev);
2560 	}
2561 	rocker_world_fini(rocker);
2562 	kfree(rocker->ports);
2563 }
2564 
2565 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2566 {
2567 	const struct rocker *rocker = rocker_port->rocker;
2568 	const struct pci_dev *pdev = rocker->pdev;
2569 	int err;
2570 
2571 	err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2572 						   rocker_port->dev->dev_addr);
2573 	if (err) {
2574 		dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2575 		eth_hw_addr_random(rocker_port->dev);
2576 	}
2577 }
2578 
2579 #define ROCKER_PORT_MIN_MTU	ETH_MIN_MTU
2580 #define ROCKER_PORT_MAX_MTU	9000
2581 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2582 {
2583 	struct pci_dev *pdev = rocker->pdev;
2584 	struct rocker_port *rocker_port;
2585 	struct net_device *dev;
2586 	int err;
2587 
2588 	dev = alloc_etherdev(sizeof(struct rocker_port));
2589 	if (!dev)
2590 		return -ENOMEM;
2591 	SET_NETDEV_DEV(dev, &pdev->dev);
2592 	rocker_port = netdev_priv(dev);
2593 	rocker_port->dev = dev;
2594 	rocker_port->rocker = rocker;
2595 	rocker_port->port_number = port_number;
2596 	rocker_port->pport = port_number + 1;
2597 
2598 	err = rocker_world_check_init(rocker_port);
2599 	if (err) {
2600 		dev_err(&pdev->dev, "world init failed\n");
2601 		goto err_world_check_init;
2602 	}
2603 
2604 	rocker_port_dev_addr_init(rocker_port);
2605 	dev->netdev_ops = &rocker_port_netdev_ops;
2606 	dev->ethtool_ops = &rocker_port_ethtool_ops;
2607 	netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2608 			  NAPI_POLL_WEIGHT);
2609 	netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2610 		       NAPI_POLL_WEIGHT);
2611 	rocker_carrier_init(rocker_port);
2612 
2613 	dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2614 
2615 	/* MTU range: 68 - 9000 */
2616 	dev->min_mtu = ROCKER_PORT_MIN_MTU;
2617 	dev->max_mtu = ROCKER_PORT_MAX_MTU;
2618 
2619 	err = rocker_world_port_pre_init(rocker_port);
2620 	if (err) {
2621 		dev_err(&pdev->dev, "port world pre-init failed\n");
2622 		goto err_world_port_pre_init;
2623 	}
2624 	err = register_netdev(dev);
2625 	if (err) {
2626 		dev_err(&pdev->dev, "register_netdev failed\n");
2627 		goto err_register_netdev;
2628 	}
2629 	rocker->ports[port_number] = rocker_port;
2630 
2631 	err = rocker_world_port_init(rocker_port);
2632 	if (err) {
2633 		dev_err(&pdev->dev, "port world init failed\n");
2634 		goto err_world_port_init;
2635 	}
2636 
2637 	return 0;
2638 
2639 err_world_port_init:
2640 	rocker->ports[port_number] = NULL;
2641 	unregister_netdev(dev);
2642 err_register_netdev:
2643 	rocker_world_port_post_fini(rocker_port);
2644 err_world_port_pre_init:
2645 err_world_check_init:
2646 	free_netdev(dev);
2647 	return err;
2648 }
2649 
2650 static int rocker_probe_ports(struct rocker *rocker)
2651 {
2652 	int i;
2653 	size_t alloc_size;
2654 	int err;
2655 
2656 	alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2657 	rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2658 	if (!rocker->ports)
2659 		return -ENOMEM;
2660 	for (i = 0; i < rocker->port_count; i++) {
2661 		err = rocker_probe_port(rocker, i);
2662 		if (err)
2663 			goto remove_ports;
2664 	}
2665 	return 0;
2666 
2667 remove_ports:
2668 	rocker_remove_ports(rocker);
2669 	return err;
2670 }
2671 
2672 static int rocker_msix_init(struct rocker *rocker)
2673 {
2674 	struct pci_dev *pdev = rocker->pdev;
2675 	int msix_entries;
2676 	int i;
2677 	int err;
2678 
2679 	msix_entries = pci_msix_vec_count(pdev);
2680 	if (msix_entries < 0)
2681 		return msix_entries;
2682 
2683 	if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2684 		return -EINVAL;
2685 
2686 	rocker->msix_entries = kmalloc_array(msix_entries,
2687 					     sizeof(struct msix_entry),
2688 					     GFP_KERNEL);
2689 	if (!rocker->msix_entries)
2690 		return -ENOMEM;
2691 
2692 	for (i = 0; i < msix_entries; i++)
2693 		rocker->msix_entries[i].entry = i;
2694 
2695 	err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2696 	if (err < 0)
2697 		goto err_enable_msix;
2698 
2699 	return 0;
2700 
2701 err_enable_msix:
2702 	kfree(rocker->msix_entries);
2703 	return err;
2704 }
2705 
2706 static void rocker_msix_fini(const struct rocker *rocker)
2707 {
2708 	pci_disable_msix(rocker->pdev);
2709 	kfree(rocker->msix_entries);
2710 }
2711 
2712 static bool rocker_port_dev_check(const struct net_device *dev)
2713 {
2714 	return dev->netdev_ops == &rocker_port_netdev_ops;
2715 }
2716 
2717 static int
2718 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2719 		struct switchdev_notifier_port_attr_info *port_attr_info)
2720 {
2721 	int err;
2722 
2723 	err = rocker_port_attr_set(netdev, port_attr_info->attr,
2724 				   port_attr_info->trans);
2725 
2726 	port_attr_info->handled = true;
2727 	return notifier_from_errno(err);
2728 }
2729 
2730 struct rocker_switchdev_event_work {
2731 	struct work_struct work;
2732 	struct switchdev_notifier_fdb_info fdb_info;
2733 	struct rocker_port *rocker_port;
2734 	unsigned long event;
2735 };
2736 
2737 static void
2738 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2739 			  struct switchdev_notifier_fdb_info *recv_info)
2740 {
2741 	struct switchdev_notifier_fdb_info info;
2742 
2743 	info.addr = recv_info->addr;
2744 	info.vid = recv_info->vid;
2745 	info.offloaded = true;
2746 	call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2747 				 rocker_port->dev, &info.info, NULL);
2748 }
2749 
2750 static void rocker_switchdev_event_work(struct work_struct *work)
2751 {
2752 	struct rocker_switchdev_event_work *switchdev_work =
2753 		container_of(work, struct rocker_switchdev_event_work, work);
2754 	struct rocker_port *rocker_port = switchdev_work->rocker_port;
2755 	struct switchdev_notifier_fdb_info *fdb_info;
2756 	int err;
2757 
2758 	rtnl_lock();
2759 	switch (switchdev_work->event) {
2760 	case SWITCHDEV_FDB_ADD_TO_DEVICE:
2761 		fdb_info = &switchdev_work->fdb_info;
2762 		if (!fdb_info->added_by_user)
2763 			break;
2764 		err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2765 		if (err) {
2766 			netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2767 			break;
2768 		}
2769 		rocker_fdb_offload_notify(rocker_port, fdb_info);
2770 		break;
2771 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
2772 		fdb_info = &switchdev_work->fdb_info;
2773 		if (!fdb_info->added_by_user)
2774 			break;
2775 		err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2776 		if (err)
2777 			netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2778 		break;
2779 	}
2780 	rtnl_unlock();
2781 
2782 	kfree(switchdev_work->fdb_info.addr);
2783 	kfree(switchdev_work);
2784 	dev_put(rocker_port->dev);
2785 }
2786 
2787 /* called under rcu_read_lock() */
2788 static int rocker_switchdev_event(struct notifier_block *unused,
2789 				  unsigned long event, void *ptr)
2790 {
2791 	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2792 	struct rocker_switchdev_event_work *switchdev_work;
2793 	struct switchdev_notifier_fdb_info *fdb_info = ptr;
2794 	struct rocker_port *rocker_port;
2795 
2796 	if (!rocker_port_dev_check(dev))
2797 		return NOTIFY_DONE;
2798 
2799 	if (event == SWITCHDEV_PORT_ATTR_SET)
2800 		return rocker_switchdev_port_attr_set_event(dev, ptr);
2801 
2802 	rocker_port = netdev_priv(dev);
2803 	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2804 	if (WARN_ON(!switchdev_work))
2805 		return NOTIFY_BAD;
2806 
2807 	INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2808 	switchdev_work->rocker_port = rocker_port;
2809 	switchdev_work->event = event;
2810 
2811 	switch (event) {
2812 	case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
2813 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
2814 		memcpy(&switchdev_work->fdb_info, ptr,
2815 		       sizeof(switchdev_work->fdb_info));
2816 		switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2817 		if (unlikely(!switchdev_work->fdb_info.addr)) {
2818 			kfree(switchdev_work);
2819 			return NOTIFY_BAD;
2820 		}
2821 
2822 		ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2823 				fdb_info->addr);
2824 		/* Take a reference on the rocker device */
2825 		dev_hold(dev);
2826 		break;
2827 	default:
2828 		kfree(switchdev_work);
2829 		return NOTIFY_DONE;
2830 	}
2831 
2832 	queue_work(rocker_port->rocker->rocker_owq,
2833 		   &switchdev_work->work);
2834 	return NOTIFY_DONE;
2835 }
2836 
2837 static int
2838 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2839 			struct switchdev_notifier_port_obj_info *port_obj_info)
2840 {
2841 	int err = -EOPNOTSUPP;
2842 
2843 	switch (event) {
2844 	case SWITCHDEV_PORT_OBJ_ADD:
2845 		err = rocker_port_obj_add(netdev, port_obj_info->obj,
2846 					  port_obj_info->trans);
2847 		break;
2848 	case SWITCHDEV_PORT_OBJ_DEL:
2849 		err = rocker_port_obj_del(netdev, port_obj_info->obj);
2850 		break;
2851 	}
2852 
2853 	port_obj_info->handled = true;
2854 	return notifier_from_errno(err);
2855 }
2856 
2857 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2858 					   unsigned long event, void *ptr)
2859 {
2860 	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2861 
2862 	if (!rocker_port_dev_check(dev))
2863 		return NOTIFY_DONE;
2864 
2865 	switch (event) {
2866 	case SWITCHDEV_PORT_OBJ_ADD:
2867 	case SWITCHDEV_PORT_OBJ_DEL:
2868 		return rocker_switchdev_port_obj_event(event, dev, ptr);
2869 	case SWITCHDEV_PORT_ATTR_SET:
2870 		return rocker_switchdev_port_attr_set_event(dev, ptr);
2871 	}
2872 
2873 	return NOTIFY_DONE;
2874 }
2875 
2876 static struct notifier_block rocker_switchdev_notifier = {
2877 	.notifier_call = rocker_switchdev_event,
2878 };
2879 
2880 static struct notifier_block rocker_switchdev_blocking_notifier = {
2881 	.notifier_call = rocker_switchdev_blocking_event,
2882 };
2883 
2884 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2885 {
2886 	struct notifier_block *nb;
2887 	struct rocker *rocker;
2888 	int err;
2889 
2890 	rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2891 	if (!rocker)
2892 		return -ENOMEM;
2893 
2894 	err = pci_enable_device(pdev);
2895 	if (err) {
2896 		dev_err(&pdev->dev, "pci_enable_device failed\n");
2897 		goto err_pci_enable_device;
2898 	}
2899 
2900 	err = pci_request_regions(pdev, rocker_driver_name);
2901 	if (err) {
2902 		dev_err(&pdev->dev, "pci_request_regions failed\n");
2903 		goto err_pci_request_regions;
2904 	}
2905 
2906 	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2907 	if (!err) {
2908 		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2909 		if (err) {
2910 			dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2911 			goto err_pci_set_dma_mask;
2912 		}
2913 	} else {
2914 		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2915 		if (err) {
2916 			dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2917 			goto err_pci_set_dma_mask;
2918 		}
2919 	}
2920 
2921 	if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2922 		dev_err(&pdev->dev, "invalid PCI region size\n");
2923 		err = -EINVAL;
2924 		goto err_pci_resource_len_check;
2925 	}
2926 
2927 	rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2928 				  pci_resource_len(pdev, 0));
2929 	if (!rocker->hw_addr) {
2930 		dev_err(&pdev->dev, "ioremap failed\n");
2931 		err = -EIO;
2932 		goto err_ioremap;
2933 	}
2934 	pci_set_master(pdev);
2935 
2936 	rocker->pdev = pdev;
2937 	pci_set_drvdata(pdev, rocker);
2938 
2939 	rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2940 
2941 	err = rocker_msix_init(rocker);
2942 	if (err) {
2943 		dev_err(&pdev->dev, "MSI-X init failed\n");
2944 		goto err_msix_init;
2945 	}
2946 
2947 	err = rocker_basic_hw_test(rocker);
2948 	if (err) {
2949 		dev_err(&pdev->dev, "basic hw test failed\n");
2950 		goto err_basic_hw_test;
2951 	}
2952 
2953 	rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2954 
2955 	err = rocker_dma_rings_init(rocker);
2956 	if (err)
2957 		goto err_dma_rings_init;
2958 
2959 	err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2960 			  rocker_cmd_irq_handler, 0,
2961 			  rocker_driver_name, rocker);
2962 	if (err) {
2963 		dev_err(&pdev->dev, "cannot assign cmd irq\n");
2964 		goto err_request_cmd_irq;
2965 	}
2966 
2967 	err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2968 			  rocker_event_irq_handler, 0,
2969 			  rocker_driver_name, rocker);
2970 	if (err) {
2971 		dev_err(&pdev->dev, "cannot assign event irq\n");
2972 		goto err_request_event_irq;
2973 	}
2974 
2975 	rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2976 						     WQ_MEM_RECLAIM);
2977 	if (!rocker->rocker_owq) {
2978 		err = -ENOMEM;
2979 		goto err_alloc_ordered_workqueue;
2980 	}
2981 
2982 	err = rocker_probe_ports(rocker);
2983 	if (err) {
2984 		dev_err(&pdev->dev, "failed to probe ports\n");
2985 		goto err_probe_ports;
2986 	}
2987 
2988 	/* Only FIBs pointing to our own netdevs are programmed into
2989 	 * the device, so no need to pass a callback.
2990 	 */
2991 	rocker->fib_nb.notifier_call = rocker_router_fib_event;
2992 	err = register_fib_notifier(&rocker->fib_nb, NULL);
2993 	if (err)
2994 		goto err_register_fib_notifier;
2995 
2996 	err = register_switchdev_notifier(&rocker_switchdev_notifier);
2997 	if (err) {
2998 		dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2999 		goto err_register_switchdev_notifier;
3000 	}
3001 
3002 	nb = &rocker_switchdev_blocking_notifier;
3003 	err = register_switchdev_blocking_notifier(nb);
3004 	if (err) {
3005 		dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
3006 		goto err_register_switchdev_blocking_notifier;
3007 	}
3008 
3009 	rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
3010 
3011 	dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
3012 		 (int)sizeof(rocker->hw.id), &rocker->hw.id);
3013 
3014 	return 0;
3015 
3016 err_register_switchdev_blocking_notifier:
3017 	unregister_switchdev_notifier(&rocker_switchdev_notifier);
3018 err_register_switchdev_notifier:
3019 	unregister_fib_notifier(&rocker->fib_nb);
3020 err_register_fib_notifier:
3021 	rocker_remove_ports(rocker);
3022 err_probe_ports:
3023 	destroy_workqueue(rocker->rocker_owq);
3024 err_alloc_ordered_workqueue:
3025 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3026 err_request_event_irq:
3027 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3028 err_request_cmd_irq:
3029 	rocker_dma_rings_fini(rocker);
3030 err_dma_rings_init:
3031 err_basic_hw_test:
3032 	rocker_msix_fini(rocker);
3033 err_msix_init:
3034 	iounmap(rocker->hw_addr);
3035 err_ioremap:
3036 err_pci_resource_len_check:
3037 err_pci_set_dma_mask:
3038 	pci_release_regions(pdev);
3039 err_pci_request_regions:
3040 	pci_disable_device(pdev);
3041 err_pci_enable_device:
3042 	kfree(rocker);
3043 	return err;
3044 }
3045 
3046 static void rocker_remove(struct pci_dev *pdev)
3047 {
3048 	struct rocker *rocker = pci_get_drvdata(pdev);
3049 	struct notifier_block *nb;
3050 
3051 	nb = &rocker_switchdev_blocking_notifier;
3052 	unregister_switchdev_blocking_notifier(nb);
3053 
3054 	unregister_switchdev_notifier(&rocker_switchdev_notifier);
3055 	unregister_fib_notifier(&rocker->fib_nb);
3056 	rocker_remove_ports(rocker);
3057 	rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3058 	destroy_workqueue(rocker->rocker_owq);
3059 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3060 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3061 	rocker_dma_rings_fini(rocker);
3062 	rocker_msix_fini(rocker);
3063 	iounmap(rocker->hw_addr);
3064 	pci_release_regions(rocker->pdev);
3065 	pci_disable_device(rocker->pdev);
3066 	kfree(rocker);
3067 }
3068 
3069 static struct pci_driver rocker_pci_driver = {
3070 	.name		= rocker_driver_name,
3071 	.id_table	= rocker_pci_id_table,
3072 	.probe		= rocker_probe,
3073 	.remove		= rocker_remove,
3074 };
3075 
3076 /************************************
3077  * Net device notifier event handler
3078  ************************************/
3079 
3080 static bool rocker_port_dev_check_under(const struct net_device *dev,
3081 					struct rocker *rocker)
3082 {
3083 	struct rocker_port *rocker_port;
3084 
3085 	if (!rocker_port_dev_check(dev))
3086 		return false;
3087 
3088 	rocker_port = netdev_priv(dev);
3089 	if (rocker_port->rocker != rocker)
3090 		return false;
3091 
3092 	return true;
3093 }
3094 
3095 struct rocker_walk_data {
3096 	struct rocker *rocker;
3097 	struct rocker_port *port;
3098 };
3099 
3100 static int rocker_lower_dev_walk(struct net_device *lower_dev, void *_data)
3101 {
3102 	struct rocker_walk_data *data = _data;
3103 	int ret = 0;
3104 
3105 	if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3106 		data->port = netdev_priv(lower_dev);
3107 		ret = 1;
3108 	}
3109 
3110 	return ret;
3111 }
3112 
3113 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3114 					       struct rocker *rocker)
3115 {
3116 	struct rocker_walk_data data;
3117 
3118 	if (rocker_port_dev_check_under(dev, rocker))
3119 		return netdev_priv(dev);
3120 
3121 	data.rocker = rocker;
3122 	data.port = NULL;
3123 	netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &data);
3124 
3125 	return data.port;
3126 }
3127 
3128 static int rocker_netdevice_event(struct notifier_block *unused,
3129 				  unsigned long event, void *ptr)
3130 {
3131 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3132 	struct netdev_notifier_changeupper_info *info;
3133 	struct rocker_port *rocker_port;
3134 	int err;
3135 
3136 	if (!rocker_port_dev_check(dev))
3137 		return NOTIFY_DONE;
3138 
3139 	switch (event) {
3140 	case NETDEV_CHANGEUPPER:
3141 		info = ptr;
3142 		if (!info->master)
3143 			goto out;
3144 		rocker_port = netdev_priv(dev);
3145 		if (info->linking) {
3146 			err = rocker_world_port_master_linked(rocker_port,
3147 							      info->upper_dev);
3148 			if (err)
3149 				netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3150 					    err);
3151 		} else {
3152 			err = rocker_world_port_master_unlinked(rocker_port,
3153 								info->upper_dev);
3154 			if (err)
3155 				netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3156 					    err);
3157 		}
3158 	}
3159 out:
3160 	return NOTIFY_DONE;
3161 }
3162 
3163 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3164 	.notifier_call = rocker_netdevice_event,
3165 };
3166 
3167 /************************************
3168  * Net event notifier event handler
3169  ************************************/
3170 
3171 static int rocker_netevent_event(struct notifier_block *unused,
3172 				 unsigned long event, void *ptr)
3173 {
3174 	struct rocker_port *rocker_port;
3175 	struct net_device *dev;
3176 	struct neighbour *n = ptr;
3177 	int err;
3178 
3179 	switch (event) {
3180 	case NETEVENT_NEIGH_UPDATE:
3181 		if (n->tbl != &arp_tbl)
3182 			return NOTIFY_DONE;
3183 		dev = n->dev;
3184 		if (!rocker_port_dev_check(dev))
3185 			return NOTIFY_DONE;
3186 		rocker_port = netdev_priv(dev);
3187 		err = rocker_world_port_neigh_update(rocker_port, n);
3188 		if (err)
3189 			netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3190 				    err);
3191 		break;
3192 	}
3193 
3194 	return NOTIFY_DONE;
3195 }
3196 
3197 static struct notifier_block rocker_netevent_nb __read_mostly = {
3198 	.notifier_call = rocker_netevent_event,
3199 };
3200 
3201 /***********************
3202  * Module init and exit
3203  ***********************/
3204 
3205 static int __init rocker_module_init(void)
3206 {
3207 	int err;
3208 
3209 	register_netdevice_notifier(&rocker_netdevice_nb);
3210 	register_netevent_notifier(&rocker_netevent_nb);
3211 	err = pci_register_driver(&rocker_pci_driver);
3212 	if (err)
3213 		goto err_pci_register_driver;
3214 	return 0;
3215 
3216 err_pci_register_driver:
3217 	unregister_netevent_notifier(&rocker_netevent_nb);
3218 	unregister_netdevice_notifier(&rocker_netdevice_nb);
3219 	return err;
3220 }
3221 
3222 static void __exit rocker_module_exit(void)
3223 {
3224 	unregister_netevent_notifier(&rocker_netevent_nb);
3225 	unregister_netdevice_notifier(&rocker_netdevice_nb);
3226 	pci_unregister_driver(&rocker_pci_driver);
3227 }
3228 
3229 module_init(rocker_module_init);
3230 module_exit(rocker_module_exit);
3231 
3232 MODULE_LICENSE("GPL v2");
3233 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3234 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3235 MODULE_DESCRIPTION("Rocker switch device driver");
3236 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
3237