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