1	// SPDX-License-Identifier: GPL-2.0-or-later
2	/*
3	* drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
4	* Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
5	* Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
6	*/
7
8	#include <linux/kernel.h>
9	#include <linux/module.h>
10	#include <linux/pci.h>
11	#include <linux/interrupt.h>
12	#include <linux/sched.h>
13	#include <linux/wait.h>
14	#include <linux/spinlock.h>
15	#include <linux/sort.h>
16	#include <linux/random.h>
17	#include <linux/netdevice.h>
18	#include <linux/skbuff.h>
19	#include <linux/socket.h>
20	#include <linux/etherdevice.h>
21	#include <linux/ethtool.h>
22	#include <linux/if_ether.h>
23	#include <linux/if_vlan.h>
24	#include <linux/if_bridge.h>
25	#include <linux/bitops.h>
26	#include <linux/ctype.h>
27	#include <linux/workqueue.h>
28	#include <net/switchdev.h>
29	#include <net/rtnetlink.h>
30	#include <net/netevent.h>
31	#include <net/arp.h>
32	#include <net/fib_rules.h>
33	#include <net/fib_notifier.h>
34	#include <linux/io-64-nonatomic-lo-hi.h>
35	#include <generated/utsrelease.h>
36
37	#include "rocker_hw.h"
38	#include "rocker.h"
39	#include "rocker_tlv.h"
40
41	static const char rocker_driver_name[] = "rocker";
42
43	static const struct pci_device_id rocker_pci_id_table[] = {
44	{PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
45	{0, }
46	};
47
48	struct rocker_wait {
49	wait_queue_head_t wait;
50	bool done;
51	bool nowait;
52	};
53
54	static void rocker_wait_reset(struct rocker_wait *wait)
55	{
56	wait->done = false;
57	wait->nowait = false;
58	}
59
60	static void rocker_wait_init(struct rocker_wait *wait)
61	{
62	init_waitqueue_head(&wait->wait);
63	rocker_wait_reset(wait);
64	}
65
66	static struct rocker_wait *rocker_wait_create(void)
67	{
68	struct rocker_wait *wait;
69
70	wait = kzalloc(size: sizeof(*wait), GFP_KERNEL);
71	if (!wait)
72	return NULL;
73	return wait;
74	}
75
76	static void rocker_wait_destroy(struct rocker_wait *wait)
77	{
78	kfree(objp: wait);
79	}
80
81	static bool rocker_wait_event_timeout(struct rocker_wait *wait,
82	unsigned long timeout)
83	{
84	wait_event_timeout(wait->wait, wait->done, HZ / 10);
85	if (!wait->done)
86	return false;
87	return true;
88	}
89
90	static void rocker_wait_wake_up(struct rocker_wait *wait)
91	{
92	wait->done = true;
93	wake_up(&wait->wait);
94	}
95
96	static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
97	{
98	return rocker->msix_entries[vector].vector;
99	}
100
101	static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
102	{
103	return rocker_msix_vector(rocker: rocker_port->rocker,
104	ROCKER_MSIX_VEC_TX(rocker_port->port_number));
105	}
106
107	static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
108	{
109	return rocker_msix_vector(rocker: rocker_port->rocker,
110	ROCKER_MSIX_VEC_RX(rocker_port->port_number));
111	}
112
113	#define rocker_write32(rocker, reg, val) \
114	writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
115	#define rocker_read32(rocker, reg) \
116	readl((rocker)->hw_addr + (ROCKER_ ## reg))
117	#define rocker_write64(rocker, reg, val) \
118	writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
119	#define rocker_read64(rocker, reg) \
120	readq((rocker)->hw_addr + (ROCKER_ ## reg))
121
122	/*****************************
123	* HW basic testing functions
124	*****************************/
125
126	static int rocker_reg_test(const struct rocker *rocker)
127	{
128	const struct pci_dev *pdev = rocker->pdev;
129	u64 test_reg;
130	u64 rnd;
131
132	rnd = get_random_u32();
133	rnd >>= 1;
134	rocker_write32(rocker, TEST_REG, rnd);
135	test_reg = rocker_read32(rocker, TEST_REG);
136	if (test_reg != rnd * 2) {
137	dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
138	test_reg, rnd * 2);
139	return -EIO;
140	}
141
142	rnd = get_random_u32();
143	rnd <<= 31;
144	rnd |= get_random_u32();
145	rocker_write64(rocker, TEST_REG64, rnd);
146	test_reg = rocker_read64(rocker, TEST_REG64);
147	if (test_reg != rnd * 2) {
148	dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
149	test_reg, rnd * 2);
150	return -EIO;
151	}
152
153	return 0;
154	}
155
156	static int rocker_dma_test_one(const struct rocker *rocker,
157	struct rocker_wait *wait, u32 test_type,
158	dma_addr_t dma_handle, const unsigned char *buf,
159	const unsigned char *expect, size_t size)
160	{
161	const struct pci_dev *pdev = rocker->pdev;
162	int i;
163
164	rocker_wait_reset(wait);
165	rocker_write32(rocker, TEST_DMA_CTRL, test_type);
166
167	if (!rocker_wait_event_timeout(wait, HZ / 10)) {
168	dev_err(&pdev->dev, "no interrupt received within a timeout\n");
169	return -EIO;
170	}
171
172	for (i = 0; i < size; i++) {
173	if (buf[i] != expect[i]) {
174	dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
175	buf[i], i, expect[i]);
176	return -EIO;
177	}
178	}
179	return 0;
180	}
181
182	#define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
183	#define ROCKER_TEST_DMA_FILL_PATTERN 0x96
184
185	static int rocker_dma_test_offset(const struct rocker *rocker,
186	struct rocker_wait *wait, int offset)
187	{
188	struct pci_dev *pdev = rocker->pdev;
189	unsigned char *alloc;
190	unsigned char *buf;
191	unsigned char *expect;
192	dma_addr_t dma_handle;
193	int i;
194	int err;
195
196	alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
197	GFP_KERNEL | GFP_DMA);
198	if (!alloc)
199	return -ENOMEM;
200	buf = alloc + offset;
201	expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
202
203	dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
204	DMA_BIDIRECTIONAL);
205	if (dma_mapping_error(dev: &pdev->dev, dma_addr: dma_handle)) {
206	err = -EIO;
207	goto free_alloc;
208	}
209
210	rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
211	rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
212
213	memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
214	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
215	dma_handle, buf, expect,
216	ROCKER_TEST_DMA_BUF_SIZE);
217	if (err)
218	goto unmap;
219
220	memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
221	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
222	dma_handle, buf, expect,
223	ROCKER_TEST_DMA_BUF_SIZE);
224	if (err)
225	goto unmap;
226
227	get_random_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
228	for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
229	expect[i] = ~buf[i];
230	err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
231	dma_handle, buf, expect,
232	ROCKER_TEST_DMA_BUF_SIZE);
233	if (err)
234	goto unmap;
235
236	unmap:
237	dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
238	DMA_BIDIRECTIONAL);
239	free_alloc:
240	kfree(objp: alloc);
241
242	return err;
243	}
244
245	static int rocker_dma_test(const struct rocker *rocker,
246	struct rocker_wait *wait)
247	{
248	int i;
249	int err;
250
251	for (i = 0; i < 8; i++) {
252	err = rocker_dma_test_offset(rocker, wait, offset: i);
253	if (err)
254	return err;
255	}
256	return 0;
257	}
258
259	static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
260	{
261	struct rocker_wait *wait = dev_id;
262
263	rocker_wait_wake_up(wait);
264
265	return IRQ_HANDLED;
266	}
267
268	static int rocker_basic_hw_test(const struct rocker *rocker)
269	{
270	const struct pci_dev *pdev = rocker->pdev;
271	struct rocker_wait wait;
272	int err;
273
274	err = rocker_reg_test(rocker);
275	if (err) {
276	dev_err(&pdev->dev, "reg test failed\n");
277	return err;
278	}
279
280	err = request_irq(irq: rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_TEST),
281	handler: rocker_test_irq_handler, flags: 0,
282	name: rocker_driver_name, dev: &wait);
283	if (err) {
284	dev_err(&pdev->dev, "cannot assign test irq\n");
285	return err;
286	}
287
288	rocker_wait_init(wait: &wait);
289	rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
290
291	if (!rocker_wait_event_timeout(wait: &wait, HZ / 10)) {
292	dev_err(&pdev->dev, "no interrupt received within a timeout\n");
293	err = -EIO;
294	goto free_irq;
295	}
296
297	err = rocker_dma_test(rocker, wait: &wait);
298	if (err)
299	dev_err(&pdev->dev, "dma test failed\n");
300
301	free_irq:
302	free_irq(rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_TEST), &wait);
303	return err;
304	}
305
306	/******************************************
307	* DMA rings and descriptors manipulations
308	******************************************/
309
310	static u32 __pos_inc(u32 pos, size_t limit)
311	{
312	return ++pos == limit ? 0 : pos;
313	}
314
315	static int rocker_desc_err(const struct rocker_desc_info *desc_info)
316	{
317	int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
318
319	switch (err) {
320	case ROCKER_OK:
321	return 0;
322	case -ROCKER_ENOENT:
323	return -ENOENT;
324	case -ROCKER_ENXIO:
325	return -ENXIO;
326	case -ROCKER_ENOMEM:
327	return -ENOMEM;
328	case -ROCKER_EEXIST:
329	return -EEXIST;
330	case -ROCKER_EINVAL:
331	return -EINVAL;
332	case -ROCKER_EMSGSIZE:
333	return -EMSGSIZE;
334	case -ROCKER_ENOTSUP:
335	return -EOPNOTSUPP;
336	case -ROCKER_ENOBUFS:
337	return -ENOBUFS;
338	}
339
340	return -EINVAL;
341	}
342
343	static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
344	{
345	desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
346	}
347
348	static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
349	{
350	u32 comp_err = desc_info->desc->comp_err;
351
352	return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
353	}
354
355	static void *
356	rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
357	{
358	return (void *)(uintptr_t)desc_info->desc->cookie;
359	}
360
361	static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
362	void *ptr)
363	{
364	desc_info->desc->cookie = (uintptr_t) ptr;
365	}
366
367	static struct rocker_desc_info *
368	rocker_desc_head_get(const struct rocker_dma_ring_info *info)
369	{
370	struct rocker_desc_info *desc_info;
371	u32 head = __pos_inc(pos: info->head, limit: info->size);
372
373	desc_info = &info->desc_info[info->head];
374	if (head == info->tail)
375	return NULL; /* ring full */
376	desc_info->tlv_size = 0;
377	return desc_info;
378	}
379
380	static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
381	{
382	desc_info->desc->buf_size = desc_info->data_size;
383	desc_info->desc->tlv_size = desc_info->tlv_size;
384	}
385
386	static void rocker_desc_head_set(const struct rocker *rocker,
387	struct rocker_dma_ring_info *info,
388	const struct rocker_desc_info *desc_info)
389	{
390	u32 head = __pos_inc(pos: info->head, limit: info->size);
391
392	BUG_ON(head == info->tail);
393	rocker_desc_commit(desc_info);
394	info->head = head;
395	rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
396	}
397
398	static struct rocker_desc_info *
399	rocker_desc_tail_get(struct rocker_dma_ring_info *info)
400	{
401	struct rocker_desc_info *desc_info;
402
403	if (info->tail == info->head)
404	return NULL; /* nothing to be done between head and tail */
405	desc_info = &info->desc_info[info->tail];
406	if (!rocker_desc_gen(desc_info))
407	return NULL; /* gen bit not set, desc is not ready yet */
408	info->tail = __pos_inc(pos: info->tail, limit: info->size);
409	desc_info->tlv_size = desc_info->desc->tlv_size;
410	return desc_info;
411	}
412
413	static void rocker_dma_ring_credits_set(const struct rocker *rocker,
414	const struct rocker_dma_ring_info *info,
415	u32 credits)
416	{
417	if (credits)
418	rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
419	}
420
421	static unsigned long rocker_dma_ring_size_fix(size_t size)
422	{
423	return max(ROCKER_DMA_SIZE_MIN,
424	min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
425	}
426
427	static int rocker_dma_ring_create(const struct rocker *rocker,
428	unsigned int type,
429	size_t size,
430	struct rocker_dma_ring_info *info)
431	{
432	int i;
433
434	BUG_ON(size != rocker_dma_ring_size_fix(size));
435	info->size = size;
436	info->type = type;
437	info->head = 0;
438	info->tail = 0;
439	info->desc_info = kcalloc(n: info->size, size: sizeof(*info->desc_info),
440	GFP_KERNEL);
441	if (!info->desc_info)
442	return -ENOMEM;
443
444	info->desc = dma_alloc_coherent(dev: &rocker->pdev->dev,
445	size: info->size * sizeof(*info->desc),
446	dma_handle: &info->mapaddr, GFP_KERNEL);
447	if (!info->desc) {
448	kfree(objp: info->desc_info);
449	return -ENOMEM;
450	}
451
452	for (i = 0; i < info->size; i++)
453	info->desc_info[i].desc = &info->desc[i];
454
455	rocker_write32(rocker, DMA_DESC_CTRL(info->type),
456	ROCKER_DMA_DESC_CTRL_RESET);
457	rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
458	rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
459
460	return 0;
461	}
462
463	static void rocker_dma_ring_destroy(const struct rocker *rocker,
464	const struct rocker_dma_ring_info *info)
465	{
466	rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
467
468	dma_free_coherent(dev: &rocker->pdev->dev,
469	size: info->size * sizeof(struct rocker_desc), cpu_addr: info->desc,
470	dma_handle: info->mapaddr);
471	kfree(objp: info->desc_info);
472	}
473
474	static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
475	struct rocker_dma_ring_info *info)
476	{
477	int i;
478
479	BUG_ON(info->head || info->tail);
480
481	/* When ring is consumer, we need to advance head for each desc.
482	* That tells hw that the desc is ready to be used by it.
483	*/
484	for (i = 0; i < info->size - 1; i++)
485	rocker_desc_head_set(rocker, info, desc_info: &info->desc_info[i]);
486	rocker_desc_commit(desc_info: &info->desc_info[i]);
487	}
488
489	static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
490	const struct rocker_dma_ring_info *info,
491	int direction, size_t buf_size)
492	{
493	struct pci_dev *pdev = rocker->pdev;
494	int i;
495	int err;
496
497	for (i = 0; i < info->size; i++) {
498	struct rocker_desc_info *desc_info = &info->desc_info[i];
499	struct rocker_desc *desc = &info->desc[i];
500	dma_addr_t dma_handle;
501	char *buf;
502
503	buf = kzalloc(size: buf_size, GFP_KERNEL | GFP_DMA);
504	if (!buf) {
505	err = -ENOMEM;
506	goto rollback;
507	}
508
509	dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
510	direction);
511	if (dma_mapping_error(dev: &pdev->dev, dma_addr: dma_handle)) {
512	kfree(objp: 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	dma_unmap_single(&pdev->dev,
531	dma_unmap_addr(desc_info, mapaddr),
532	desc_info->data_size, direction);
533	kfree(objp: desc_info->data);
534	}
535	return err;
536	}
537
538	static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
539	const struct rocker_dma_ring_info *info,
540	int direction)
541	{
542	struct pci_dev *pdev = rocker->pdev;
543	int i;
544
545	for (i = 0; i < info->size; i++) {
546	const struct rocker_desc_info *desc_info = &info->desc_info[i];
547	struct rocker_desc *desc = &info->desc[i];
548
549	desc->buf_addr = 0;
550	desc->buf_size = 0;
551	dma_unmap_single(&pdev->dev,
552	dma_unmap_addr(desc_info, mapaddr),
553	desc_info->data_size, direction);
554	kfree(objp: desc_info->data);
555	}
556	}
557
558	static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
559	{
560	struct rocker_wait *wait;
561
562	wait = rocker_wait_create();
563	if (!wait)
564	return -ENOMEM;
565	rocker_desc_cookie_ptr_set(desc_info, ptr: wait);
566	return 0;
567	}
568
569	static void
570	rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
571	{
572	struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
573
574	rocker_wait_destroy(wait);
575	}
576
577	static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
578	{
579	const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
580	int i;
581	int err;
582
583	for (i = 0; i < cmd_ring->size; i++) {
584	err = rocker_dma_cmd_ring_wait_alloc(desc_info: &cmd_ring->desc_info[i]);
585	if (err)
586	goto rollback;
587	}
588	return 0;
589
590	rollback:
591	for (i--; i >= 0; i--)
592	rocker_dma_cmd_ring_wait_free(desc_info: &cmd_ring->desc_info[i]);
593	return err;
594	}
595
596	static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
597	{
598	const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
599	int i;
600
601	for (i = 0; i < cmd_ring->size; i++)
602	rocker_dma_cmd_ring_wait_free(desc_info: &cmd_ring->desc_info[i]);
603	}
604
605	static int rocker_dma_rings_init(struct rocker *rocker)
606	{
607	const struct pci_dev *pdev = rocker->pdev;
608	int err;
609
610	err = rocker_dma_ring_create(rocker, type: ROCKER_DMA_CMD,
611	ROCKER_DMA_CMD_DEFAULT_SIZE,
612	info: &rocker->cmd_ring);
613	if (err) {
614	dev_err(&pdev->dev, "failed to create command dma ring\n");
615	return err;
616	}
617
618	spin_lock_init(&rocker->cmd_ring_lock);
619
620	err = rocker_dma_ring_bufs_alloc(rocker, info: &rocker->cmd_ring,
621	direction: DMA_BIDIRECTIONAL, PAGE_SIZE);
622	if (err) {
623	dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
624	goto err_dma_cmd_ring_bufs_alloc;
625	}
626
627	err = rocker_dma_cmd_ring_waits_alloc(rocker);
628	if (err) {
629	dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
630	goto err_dma_cmd_ring_waits_alloc;
631	}
632
633	err = rocker_dma_ring_create(rocker, type: ROCKER_DMA_EVENT,
634	ROCKER_DMA_EVENT_DEFAULT_SIZE,
635	info: &rocker->event_ring);
636	if (err) {
637	dev_err(&pdev->dev, "failed to create event dma ring\n");
638	goto err_dma_event_ring_create;
639	}
640
641	err = rocker_dma_ring_bufs_alloc(rocker, info: &rocker->event_ring,
642	direction: DMA_FROM_DEVICE, PAGE_SIZE);
643	if (err) {
644	dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
645	goto err_dma_event_ring_bufs_alloc;
646	}
647	rocker_dma_ring_pass_to_producer(rocker, info: &rocker->event_ring);
648	return 0;
649
650	err_dma_event_ring_bufs_alloc:
651	rocker_dma_ring_destroy(rocker, info: &rocker->event_ring);
652	err_dma_event_ring_create:
653	rocker_dma_cmd_ring_waits_free(rocker);
654	err_dma_cmd_ring_waits_alloc:
655	rocker_dma_ring_bufs_free(rocker, info: &rocker->cmd_ring,
656	direction: DMA_BIDIRECTIONAL);
657	err_dma_cmd_ring_bufs_alloc:
658	rocker_dma_ring_destroy(rocker, info: &rocker->cmd_ring);
659	return err;
660	}
661
662	static void rocker_dma_rings_fini(struct rocker *rocker)
663	{
664	rocker_dma_ring_bufs_free(rocker, info: &rocker->event_ring,
665	direction: DMA_BIDIRECTIONAL);
666	rocker_dma_ring_destroy(rocker, info: &rocker->event_ring);
667	rocker_dma_cmd_ring_waits_free(rocker);
668	rocker_dma_ring_bufs_free(rocker, info: &rocker->cmd_ring,
669	direction: DMA_BIDIRECTIONAL);
670	rocker_dma_ring_destroy(rocker, info: &rocker->cmd_ring);
671	}
672
673	static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
674	struct rocker_desc_info *desc_info,
675	struct sk_buff *skb, size_t buf_len)
676	{
677	const struct rocker *rocker = rocker_port->rocker;
678	struct pci_dev *pdev = rocker->pdev;
679	dma_addr_t dma_handle;
680
681	dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
682	DMA_FROM_DEVICE);
683	if (dma_mapping_error(dev: &pdev->dev, dma_addr: dma_handle))
684	return -EIO;
685	if (rocker_tlv_put_u64(desc_info, attrtype: ROCKER_TLV_RX_FRAG_ADDR, value: dma_handle))
686	goto tlv_put_failure;
687	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_RX_FRAG_MAX_LEN, value: buf_len))
688	goto tlv_put_failure;
689	return 0;
690
691	tlv_put_failure:
692	dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
693	desc_info->tlv_size = 0;
694	return -EMSGSIZE;
695	}
696
697	static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
698	{
699	return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
700	}
701
702	static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
703	struct rocker_desc_info *desc_info)
704	{
705	struct net_device *dev = rocker_port->dev;
706	struct sk_buff *skb;
707	size_t buf_len = rocker_port_rx_buf_len(rocker_port);
708	int err;
709
710	/* Ensure that hw will see tlv_size zero in case of an error.
711	* That tells hw to use another descriptor.
712	*/
713	rocker_desc_cookie_ptr_set(desc_info, NULL);
714	desc_info->tlv_size = 0;
715
716	skb = netdev_alloc_skb_ip_align(dev, length: buf_len);
717	if (!skb)
718	return -ENOMEM;
719	err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
720	if (err) {
721	dev_kfree_skb_any(skb);
722	return err;
723	}
724	rocker_desc_cookie_ptr_set(desc_info, ptr: skb);
725	return 0;
726	}
727
728	static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
729	const struct rocker_tlv **attrs)
730	{
731	struct pci_dev *pdev = rocker->pdev;
732	dma_addr_t dma_handle;
733	size_t len;
734
735	if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
736	!attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
737	return;
738	dma_handle = rocker_tlv_get_u64(tlv: attrs[ROCKER_TLV_RX_FRAG_ADDR]);
739	len = rocker_tlv_get_u16(tlv: attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
740	dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
741	}
742
743	static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
744	const struct rocker_desc_info *desc_info)
745	{
746	const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
747	struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
748
749	if (!skb)
750	return;
751	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_RX_MAX, desc_info);
752	rocker_dma_rx_ring_skb_unmap(rocker, attrs);
753	dev_kfree_skb_any(skb);
754	}
755
756	static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
757	{
758	const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
759	const struct rocker *rocker = rocker_port->rocker;
760	int i;
761	int err;
762
763	for (i = 0; i < rx_ring->size; i++) {
764	err = rocker_dma_rx_ring_skb_alloc(rocker_port,
765	desc_info: &rx_ring->desc_info[i]);
766	if (err)
767	goto rollback;
768	}
769	return 0;
770
771	rollback:
772	for (i--; i >= 0; i--)
773	rocker_dma_rx_ring_skb_free(rocker, desc_info: &rx_ring->desc_info[i]);
774	return err;
775	}
776
777	static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
778	{
779	const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
780	const struct rocker *rocker = rocker_port->rocker;
781	int i;
782
783	for (i = 0; i < rx_ring->size; i++)
784	rocker_dma_rx_ring_skb_free(rocker, desc_info: &rx_ring->desc_info[i]);
785	}
786
787	static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
788	{
789	struct rocker *rocker = rocker_port->rocker;
790	int err;
791
792	err = rocker_dma_ring_create(rocker,
793	ROCKER_DMA_TX(rocker_port->port_number),
794	ROCKER_DMA_TX_DEFAULT_SIZE,
795	info: &rocker_port->tx_ring);
796	if (err) {
797	netdev_err(dev: rocker_port->dev, format: "failed to create tx dma ring\n");
798	return err;
799	}
800
801	err = rocker_dma_ring_bufs_alloc(rocker, info: &rocker_port->tx_ring,
802	direction: DMA_TO_DEVICE,
803	ROCKER_DMA_TX_DESC_SIZE);
804	if (err) {
805	netdev_err(dev: rocker_port->dev, format: "failed to alloc tx dma ring buffers\n");
806	goto err_dma_tx_ring_bufs_alloc;
807	}
808
809	err = rocker_dma_ring_create(rocker,
810	ROCKER_DMA_RX(rocker_port->port_number),
811	ROCKER_DMA_RX_DEFAULT_SIZE,
812	info: &rocker_port->rx_ring);
813	if (err) {
814	netdev_err(dev: rocker_port->dev, format: "failed to create rx dma ring\n");
815	goto err_dma_rx_ring_create;
816	}
817
818	err = rocker_dma_ring_bufs_alloc(rocker, info: &rocker_port->rx_ring,
819	direction: DMA_BIDIRECTIONAL,
820	ROCKER_DMA_RX_DESC_SIZE);
821	if (err) {
822	netdev_err(dev: rocker_port->dev, format: "failed to alloc rx dma ring buffers\n");
823	goto err_dma_rx_ring_bufs_alloc;
824	}
825
826	err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
827	if (err) {
828	netdev_err(dev: rocker_port->dev, format: "failed to alloc rx dma ring skbs\n");
829	goto err_dma_rx_ring_skbs_alloc;
830	}
831	rocker_dma_ring_pass_to_producer(rocker, info: &rocker_port->rx_ring);
832
833	return 0;
834
835	err_dma_rx_ring_skbs_alloc:
836	rocker_dma_ring_bufs_free(rocker, info: &rocker_port->rx_ring,
837	direction: DMA_BIDIRECTIONAL);
838	err_dma_rx_ring_bufs_alloc:
839	rocker_dma_ring_destroy(rocker, info: &rocker_port->rx_ring);
840	err_dma_rx_ring_create:
841	rocker_dma_ring_bufs_free(rocker, info: &rocker_port->tx_ring,
842	direction: DMA_TO_DEVICE);
843	err_dma_tx_ring_bufs_alloc:
844	rocker_dma_ring_destroy(rocker, info: &rocker_port->tx_ring);
845	return err;
846	}
847
848	static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
849	{
850	struct rocker *rocker = rocker_port->rocker;
851
852	rocker_dma_rx_ring_skbs_free(rocker_port);
853	rocker_dma_ring_bufs_free(rocker, info: &rocker_port->rx_ring,
854	direction: DMA_BIDIRECTIONAL);
855	rocker_dma_ring_destroy(rocker, info: &rocker_port->rx_ring);
856	rocker_dma_ring_bufs_free(rocker, info: &rocker_port->tx_ring,
857	direction: DMA_TO_DEVICE);
858	rocker_dma_ring_destroy(rocker, info: &rocker_port->tx_ring);
859	}
860
861	static void rocker_port_set_enable(const struct rocker_port *rocker_port,
862	bool enable)
863	{
864	u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
865
866	if (enable)
867	val |= 1ULL << rocker_port->pport;
868	else
869	val &= ~(1ULL << rocker_port->pport);
870	rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
871	}
872
873	/********************************
874	* Interrupt handler and helpers
875	********************************/
876
877	static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
878	{
879	struct rocker *rocker = dev_id;
880	const struct rocker_desc_info *desc_info;
881	struct rocker_wait *wait;
882	u32 credits = 0;
883
884	spin_lock(lock: &rocker->cmd_ring_lock);
885	while ((desc_info = rocker_desc_tail_get(info: &rocker->cmd_ring))) {
886	wait = rocker_desc_cookie_ptr_get(desc_info);
887	if (wait->nowait) {
888	rocker_desc_gen_clear(desc_info);
889	} else {
890	rocker_wait_wake_up(wait);
891	}
892	credits++;
893	}
894	spin_unlock(lock: &rocker->cmd_ring_lock);
895	rocker_dma_ring_credits_set(rocker, info: &rocker->cmd_ring, credits);
896
897	return IRQ_HANDLED;
898	}
899
900	static void rocker_port_link_up(const struct rocker_port *rocker_port)
901	{
902	netif_carrier_on(dev: rocker_port->dev);
903	netdev_info(dev: rocker_port->dev, format: "Link is up\n");
904	}
905
906	static void rocker_port_link_down(const struct rocker_port *rocker_port)
907	{
908	netif_carrier_off(dev: rocker_port->dev);
909	netdev_info(dev: rocker_port->dev, format: "Link is down\n");
910	}
911
912	static int rocker_event_link_change(const struct rocker *rocker,
913	const struct rocker_tlv *info)
914	{
915	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
916	unsigned int port_number;
917	bool link_up;
918	struct rocker_port *rocker_port;
919
920	rocker_tlv_parse_nested(tb: attrs, maxtype: ROCKER_TLV_EVENT_LINK_CHANGED_MAX, tlv: info);
921	if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
922	!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
923	return -EIO;
924	port_number =
925	rocker_tlv_get_u32(tlv: attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
926	link_up = rocker_tlv_get_u8(tlv: attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
927
928	if (port_number >= rocker->port_count)
929	return -EINVAL;
930
931	rocker_port = rocker->ports[port_number];
932	if (netif_carrier_ok(dev: rocker_port->dev) != link_up) {
933	if (link_up)
934	rocker_port_link_up(rocker_port);
935	else
936	rocker_port_link_down(rocker_port);
937	}
938
939	return 0;
940	}
941
942	static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
943	const unsigned char *addr,
944	__be16 vlan_id);
945
946	static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
947	const struct rocker_tlv *info)
948	{
949	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
950	unsigned int port_number;
951	struct rocker_port *rocker_port;
952	const unsigned char *addr;
953	__be16 vlan_id;
954
955	rocker_tlv_parse_nested(tb: attrs, maxtype: ROCKER_TLV_EVENT_MAC_VLAN_MAX, tlv: info);
956	if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
957	!attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
958	!attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
959	return -EIO;
960	port_number =
961	rocker_tlv_get_u32(tlv: attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
962	addr = rocker_tlv_data(tlv: attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
963	vlan_id = rocker_tlv_get_be16(tlv: attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
964
965	if (port_number >= rocker->port_count)
966	return -EINVAL;
967
968	rocker_port = rocker->ports[port_number];
969	return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
970	}
971
972	static int rocker_event_process(const struct rocker *rocker,
973	const struct rocker_desc_info *desc_info)
974	{
975	const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
976	const struct rocker_tlv *info;
977	u16 type;
978
979	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_EVENT_MAX, desc_info);
980	if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
981	!attrs[ROCKER_TLV_EVENT_INFO])
982	return -EIO;
983
984	type = rocker_tlv_get_u16(tlv: attrs[ROCKER_TLV_EVENT_TYPE]);
985	info = attrs[ROCKER_TLV_EVENT_INFO];
986
987	switch (type) {
988	case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
989	return rocker_event_link_change(rocker, info);
990	case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
991	return rocker_event_mac_vlan_seen(rocker, info);
992	}
993
994	return -EOPNOTSUPP;
995	}
996
997	static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
998	{
999	struct rocker *rocker = dev_id;
1000	const struct pci_dev *pdev = rocker->pdev;
1001	const struct rocker_desc_info *desc_info;
1002	u32 credits = 0;
1003	int err;
1004
1005	while ((desc_info = rocker_desc_tail_get(info: &rocker->event_ring))) {
1006	err = rocker_desc_err(desc_info);
1007	if (err) {
1008	dev_err(&pdev->dev, "event desc received with err %d\n",
1009	err);
1010	} else {
1011	err = rocker_event_process(rocker, desc_info);
1012	if (err)
1013	dev_err(&pdev->dev, "event processing failed with err %d\n",
1014	err);
1015	}
1016	rocker_desc_gen_clear(desc_info);
1017	rocker_desc_head_set(rocker, info: &rocker->event_ring, desc_info);
1018	credits++;
1019	}
1020	rocker_dma_ring_credits_set(rocker, info: &rocker->event_ring, credits);
1021
1022	return IRQ_HANDLED;
1023	}
1024
1025	static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026	{
1027	struct rocker_port *rocker_port = dev_id;
1028
1029	napi_schedule(n: &rocker_port->napi_tx);
1030	return IRQ_HANDLED;
1031	}
1032
1033	static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034	{
1035	struct rocker_port *rocker_port = dev_id;
1036
1037	napi_schedule(n: &rocker_port->napi_rx);
1038	return IRQ_HANDLED;
1039	}
1040
1041	/********************
1042	* Command interface
1043	********************/
1044
1045	int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046	rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047	rocker_cmd_proc_cb_t process, void *process_priv)
1048	{
1049	struct rocker *rocker = rocker_port->rocker;
1050	struct rocker_desc_info *desc_info;
1051	struct rocker_wait *wait;
1052	unsigned long lock_flags;
1053	int err;
1054
1055	spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057	desc_info = rocker_desc_head_get(info: &rocker->cmd_ring);
1058	if (!desc_info) {
1059	spin_unlock_irqrestore(lock: &rocker->cmd_ring_lock, flags: lock_flags);
1060	return -EAGAIN;
1061	}
1062
1063	wait = rocker_desc_cookie_ptr_get(desc_info);
1064	rocker_wait_init(wait);
1065	wait->nowait = nowait;
1066
1067	err = prepare(rocker_port, desc_info, prepare_priv);
1068	if (err) {
1069	spin_unlock_irqrestore(lock: &rocker->cmd_ring_lock, flags: lock_flags);
1070	return err;
1071	}
1072
1073	rocker_desc_head_set(rocker, info: &rocker->cmd_ring, desc_info);
1074
1075	spin_unlock_irqrestore(lock: &rocker->cmd_ring_lock, flags: lock_flags);
1076
1077	if (nowait)
1078	return 0;
1079
1080	if (!rocker_wait_event_timeout(wait, HZ / 10))
1081	return -EIO;
1082
1083	err = rocker_desc_err(desc_info);
1084	if (err)
1085	return err;
1086
1087	if (process)
1088	err = process(rocker_port, desc_info, process_priv);
1089
1090	rocker_desc_gen_clear(desc_info);
1091	return err;
1092	}
1093
1094	static int
1095	rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096	struct rocker_desc_info *desc_info,
1097	void *priv)
1098	{
1099	struct rocker_tlv *cmd_info;
1100
1101	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
1102	value: ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1103	return -EMSGSIZE;
1104	cmd_info = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
1105	if (!cmd_info)
1106	return -EMSGSIZE;
1107	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1108	value: rocker_port->pport))
1109	return -EMSGSIZE;
1110	rocker_tlv_nest_end(desc_info, start: cmd_info);
1111	return 0;
1112	}
1113
1114	static int
1115	rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116	const struct rocker_desc_info *desc_info,
1117	void *priv)
1118	{
1119	struct ethtool_link_ksettings *ecmd = priv;
1120	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122	u32 speed;
1123	u8 duplex;
1124	u8 autoneg;
1125
1126	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_CMD_MAX, desc_info);
1127	if (!attrs[ROCKER_TLV_CMD_INFO])
1128	return -EIO;
1129
1130	rocker_tlv_parse_nested(tb: info_attrs, maxtype: ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1131	tlv: attrs[ROCKER_TLV_CMD_INFO]);
1132	if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1133	!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1134	!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1135	return -EIO;
1136
1137	speed = rocker_tlv_get_u32(tlv: info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1138	duplex = rocker_tlv_get_u8(tlv: info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1139	autoneg = rocker_tlv_get_u8(tlv: info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1140
1141	ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1142	ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1143
1144	ecmd->base.phy_address = 0xff;
1145	ecmd->base.port = PORT_TP;
1146	ecmd->base.speed = speed;
1147	ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1148	ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1149
1150	return 0;
1151	}
1152
1153	static int
1154	rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155	const struct rocker_desc_info *desc_info,
1156	void *priv)
1157	{
1158	unsigned char *macaddr = priv;
1159	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161	const struct rocker_tlv *attr;
1162
1163	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_CMD_MAX, desc_info);
1164	if (!attrs[ROCKER_TLV_CMD_INFO])
1165	return -EIO;
1166
1167	rocker_tlv_parse_nested(tb: info_attrs, maxtype: ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1168	tlv: attrs[ROCKER_TLV_CMD_INFO]);
1169	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1170	if (!attr)
1171	return -EIO;
1172
1173	if (rocker_tlv_len(tlv: attr) != ETH_ALEN)
1174	return -EINVAL;
1175
1176	ether_addr_copy(dst: macaddr, src: rocker_tlv_data(tlv: attr));
1177	return 0;
1178	}
1179
1180	static int
1181	rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182	const struct rocker_desc_info *desc_info,
1183	void *priv)
1184	{
1185	u8 *p_mode = priv;
1186	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188	const struct rocker_tlv *attr;
1189
1190	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_CMD_MAX, desc_info);
1191	if (!attrs[ROCKER_TLV_CMD_INFO])
1192	return -EIO;
1193
1194	rocker_tlv_parse_nested(tb: info_attrs, maxtype: ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1195	tlv: attrs[ROCKER_TLV_CMD_INFO]);
1196	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1197	if (!attr)
1198	return -EIO;
1199
1200	*p_mode = rocker_tlv_get_u8(tlv: info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1201	return 0;
1202	}
1203
1204	struct port_name {
1205	char *buf;
1206	size_t len;
1207	};
1208
1209	static int
1210	rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211	const struct rocker_desc_info *desc_info,
1212	void *priv)
1213	{
1214	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216	struct port_name *name = priv;
1217	const struct rocker_tlv *attr;
1218	size_t i, j, len;
1219	const char *str;
1220
1221	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_CMD_MAX, desc_info);
1222	if (!attrs[ROCKER_TLV_CMD_INFO])
1223	return -EIO;
1224
1225	rocker_tlv_parse_nested(tb: info_attrs, maxtype: ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1226	tlv: attrs[ROCKER_TLV_CMD_INFO]);
1227	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1228	if (!attr)
1229	return -EIO;
1230
1231	len = min_t(size_t, rocker_tlv_len(attr), name->len);
1232	str = rocker_tlv_data(tlv: attr);
1233
1234	/* make sure name only contains alphanumeric characters */
1235	for (i = j = 0; i < len; ++i) {
1236	if (isalnum(str[i])) {
1237	name->buf[j] = str[i];
1238	j++;
1239	}
1240	}
1241
1242	if (j == 0)
1243	return -EIO;
1244
1245	name->buf[j] = '\0';
1246
1247	return 0;
1248	}
1249
1250	static int
1251	rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252	struct rocker_desc_info *desc_info,
1253	void *priv)
1254	{
1255	struct ethtool_link_ksettings *ecmd = priv;
1256	struct rocker_tlv *cmd_info;
1257
1258	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
1259	value: ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1260	return -EMSGSIZE;
1261	cmd_info = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
1262	if (!cmd_info)
1263	return -EMSGSIZE;
1264	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1265	value: rocker_port->pport))
1266	return -EMSGSIZE;
1267	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1268	value: ecmd->base.speed))
1269	return -EMSGSIZE;
1270	if (rocker_tlv_put_u8(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1271	value: ecmd->base.duplex))
1272	return -EMSGSIZE;
1273	if (rocker_tlv_put_u8(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1274	value: ecmd->base.autoneg))
1275	return -EMSGSIZE;
1276	rocker_tlv_nest_end(desc_info, start: cmd_info);
1277	return 0;
1278	}
1279
1280	static int
1281	rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282	struct rocker_desc_info *desc_info,
1283	void *priv)
1284	{
1285	const unsigned char *macaddr = priv;
1286	struct rocker_tlv *cmd_info;
1287
1288	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
1289	value: ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1290	return -EMSGSIZE;
1291	cmd_info = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
1292	if (!cmd_info)
1293	return -EMSGSIZE;
1294	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1295	value: rocker_port->pport))
1296	return -EMSGSIZE;
1297	if (rocker_tlv_put(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1298	ETH_ALEN, data: macaddr))
1299	return -EMSGSIZE;
1300	rocker_tlv_nest_end(desc_info, start: cmd_info);
1301	return 0;
1302	}
1303
1304	static int
1305	rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306	struct rocker_desc_info *desc_info,
1307	void *priv)
1308	{
1309	int mtu = *(int *)priv;
1310	struct rocker_tlv *cmd_info;
1311
1312	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
1313	value: ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1314	return -EMSGSIZE;
1315	cmd_info = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
1316	if (!cmd_info)
1317	return -EMSGSIZE;
1318	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1319	value: rocker_port->pport))
1320	return -EMSGSIZE;
1321	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1322	value: mtu))
1323	return -EMSGSIZE;
1324	rocker_tlv_nest_end(desc_info, start: cmd_info);
1325	return 0;
1326	}
1327
1328	static int
1329	rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330	struct rocker_desc_info *desc_info,
1331	void *priv)
1332	{
1333	bool learning = *(bool *)priv;
1334	struct rocker_tlv *cmd_info;
1335
1336	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
1337	value: ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1338	return -EMSGSIZE;
1339	cmd_info = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
1340	if (!cmd_info)
1341	return -EMSGSIZE;
1342	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1343	value: rocker_port->pport))
1344	return -EMSGSIZE;
1345	if (rocker_tlv_put_u8(desc_info, attrtype: ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1346	value: learning))
1347	return -EMSGSIZE;
1348	rocker_tlv_nest_end(desc_info, start: cmd_info);
1349	return 0;
1350	}
1351
1352	static int
1353	rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354	struct ethtool_link_ksettings *ecmd)
1355	{
1356	return rocker_cmd_exec(rocker_port, nowait: false,
1357	prepare: rocker_cmd_get_port_settings_prep, NULL,
1358	process: rocker_cmd_get_port_settings_ethtool_proc,
1359	process_priv: ecmd);
1360	}
1361
1362	static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363	unsigned char *macaddr)
1364	{
1365	return rocker_cmd_exec(rocker_port, nowait: false,
1366	prepare: rocker_cmd_get_port_settings_prep, NULL,
1367	process: rocker_cmd_get_port_settings_macaddr_proc,
1368	process_priv: macaddr);
1369	}
1370
1371	static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372	u8 *p_mode)
1373	{
1374	return rocker_cmd_exec(rocker_port, nowait: false,
1375	prepare: rocker_cmd_get_port_settings_prep, NULL,
1376	process: rocker_cmd_get_port_settings_mode_proc, process_priv: p_mode);
1377	}
1378
1379	static int
1380	rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381	const struct ethtool_link_ksettings *ecmd)
1382	{
1383	struct ethtool_link_ksettings copy_ecmd;
1384
1385	memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387	return rocker_cmd_exec(rocker_port, nowait: false,
1388	prepare: rocker_cmd_set_port_settings_ethtool_prep,
1389	prepare_priv: &copy_ecmd, NULL, NULL);
1390	}
1391
1392	static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393	unsigned char *macaddr)
1394	{
1395	return rocker_cmd_exec(rocker_port, nowait: false,
1396	prepare: rocker_cmd_set_port_settings_macaddr_prep,
1397	prepare_priv: macaddr, NULL, NULL);
1398	}
1399
1400	static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401	int mtu)
1402	{
1403	return rocker_cmd_exec(rocker_port, nowait: false,
1404	prepare: rocker_cmd_set_port_settings_mtu_prep,
1405	prepare_priv: &mtu, NULL, NULL);
1406	}
1407
1408	int rocker_port_set_learning(struct rocker_port *rocker_port,
1409	bool learning)
1410	{
1411	return rocker_cmd_exec(rocker_port, nowait: false,
1412	prepare: rocker_cmd_set_port_learning_prep,
1413	prepare_priv: &learning, NULL, NULL);
1414	}
1415
1416	/**********************
1417	* Worlds manipulation
1418	**********************/
1419
1420	static struct rocker_world_ops *rocker_world_ops[] = {
1421	&rocker_ofdpa_ops,
1422	};
1423
1424	#define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426	static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427	{
1428	int i;
1429
1430	for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431	if (rocker_world_ops[i]->mode == mode)
1432	return rocker_world_ops[i];
1433	return NULL;
1434	}
1435
1436	static int rocker_world_init(struct rocker *rocker, u8 mode)
1437	{
1438	struct rocker_world_ops *wops;
1439	int err;
1440
1441	wops = rocker_world_ops_find(mode);
1442	if (!wops) {
1443	dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444	mode);
1445	return -EINVAL;
1446	}
1447	rocker->wops = wops;
1448	rocker->wpriv = kzalloc(size: wops->priv_size, GFP_KERNEL);
1449	if (!rocker->wpriv)
1450	return -ENOMEM;
1451	if (!wops->init)
1452	return 0;
1453	err = wops->init(rocker);
1454	if (err)
1455	kfree(objp: rocker->wpriv);
1456	return err;
1457	}
1458
1459	static void rocker_world_fini(struct rocker *rocker)
1460	{
1461	struct rocker_world_ops *wops = rocker->wops;
1462
1463	if (!wops || !wops->fini)
1464	return;
1465	wops->fini(rocker);
1466	kfree(objp: rocker->wpriv);
1467	}
1468
1469	static int rocker_world_check_init(struct rocker_port *rocker_port)
1470	{
1471	struct rocker *rocker = rocker_port->rocker;
1472	u8 mode;
1473	int err;
1474
1475	err = rocker_cmd_get_port_settings_mode(rocker_port, p_mode: &mode);
1476	if (err) {
1477	dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478	return err;
1479	}
1480	if (rocker->wops) {
1481	if (rocker->wops->mode != mode) {
1482	dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483	return -EINVAL;
1484	}
1485	return 0;
1486	}
1487	return rocker_world_init(rocker, mode);
1488	}
1489
1490	static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491	{
1492	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493	int err;
1494
1495	rocker_port->wpriv = kzalloc(size: wops->port_priv_size, GFP_KERNEL);
1496	if (!rocker_port->wpriv)
1497	return -ENOMEM;
1498	if (!wops->port_pre_init)
1499	return 0;
1500	err = wops->port_pre_init(rocker_port);
1501	if (err)
1502	kfree(objp: rocker_port->wpriv);
1503	return 0;
1504	}
1505
1506	static int rocker_world_port_init(struct rocker_port *rocker_port)
1507	{
1508	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510	if (!wops->port_init)
1511	return 0;
1512	return wops->port_init(rocker_port);
1513	}
1514
1515	static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516	{
1517	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519	if (!wops->port_fini)
1520	return;
1521	wops->port_fini(rocker_port);
1522	}
1523
1524	static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525	{
1526	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528	if (!wops->port_post_fini)
1529	return;
1530	wops->port_post_fini(rocker_port);
1531	kfree(objp: rocker_port->wpriv);
1532	}
1533
1534	static int rocker_world_port_open(struct rocker_port *rocker_port)
1535	{
1536	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538	if (!wops->port_open)
1539	return 0;
1540	return wops->port_open(rocker_port);
1541	}
1542
1543	static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544	{
1545	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547	if (!wops->port_stop)
1548	return;
1549	wops->port_stop(rocker_port);
1550	}
1551
1552	static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553	u8 state)
1554	{
1555	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1556
1557	if (!wops->port_attr_stp_state_set)
1558	return -EOPNOTSUPP;
1559
1560	return wops->port_attr_stp_state_set(rocker_port, state);
1561	}
1562
1563	static int
1564	rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1565	rocker_port,
1566	unsigned long *
1567	p_brport_flags_support)
1568	{
1569	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1570
1571	if (!wops->port_attr_bridge_flags_support_get)
1572	return -EOPNOTSUPP;
1573	return wops->port_attr_bridge_flags_support_get(rocker_port,
1574	p_brport_flags_support);
1575	}
1576
1577	static int
1578	rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1579	struct switchdev_brport_flags flags)
1580	{
1581	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1582	unsigned long brport_flags_s;
1583	int err;
1584
1585	if (!wops->port_attr_bridge_flags_set)
1586	return -EOPNOTSUPP;
1587
1588	err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1589	p_brport_flags_support: &brport_flags_s);
1590	if (err)
1591	return err;
1592
1593	if (flags.mask & ~brport_flags_s)
1594	return -EINVAL;
1595
1596	return 0;
1597	}
1598
1599	static int
1600	rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1601	struct switchdev_brport_flags flags)
1602	{
1603	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1604
1605	if (!wops->port_attr_bridge_flags_set)
1606	return -EOPNOTSUPP;
1607
1608	return wops->port_attr_bridge_flags_set(rocker_port, flags.val);
1609	}
1610
1611	static int
1612	rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1613	u32 ageing_time)
1614	{
1615	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1616
1617	if (!wops->port_attr_bridge_ageing_time_set)
1618	return -EOPNOTSUPP;
1619
1620	return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time);
1621	}
1622
1623	static int
1624	rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1625	const struct switchdev_obj_port_vlan *vlan)
1626	{
1627	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629	if (!wops->port_obj_vlan_add)
1630	return -EOPNOTSUPP;
1631
1632	return wops->port_obj_vlan_add(rocker_port, vlan);
1633	}
1634
1635	static int
1636	rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1637	const struct switchdev_obj_port_vlan *vlan)
1638	{
1639	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1640
1641	if (netif_is_bridge_master(dev: vlan->obj.orig_dev))
1642	return -EOPNOTSUPP;
1643
1644	if (!wops->port_obj_vlan_del)
1645	return -EOPNOTSUPP;
1646	return wops->port_obj_vlan_del(rocker_port, vlan);
1647	}
1648
1649	static int
1650	rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1651	struct switchdev_notifier_fdb_info *info)
1652	{
1653	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1654
1655	if (!wops->port_obj_fdb_add)
1656	return -EOPNOTSUPP;
1657
1658	return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1659	}
1660
1661	static int
1662	rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1663	struct switchdev_notifier_fdb_info *info)
1664	{
1665	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1666
1667	if (!wops->port_obj_fdb_del)
1668	return -EOPNOTSUPP;
1669	return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1670	}
1671
1672	static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1673	struct net_device *master,
1674	struct netlink_ext_ack *extack)
1675	{
1676	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1677
1678	if (!wops->port_master_linked)
1679	return -EOPNOTSUPP;
1680	return wops->port_master_linked(rocker_port, master, extack);
1681	}
1682
1683	static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1684	struct net_device *master)
1685	{
1686	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1687
1688	if (!wops->port_master_unlinked)
1689	return -EOPNOTSUPP;
1690	return wops->port_master_unlinked(rocker_port, master);
1691	}
1692
1693	static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1694	struct neighbour *n)
1695	{
1696	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1697
1698	if (!wops->port_neigh_update)
1699	return -EOPNOTSUPP;
1700	return wops->port_neigh_update(rocker_port, n);
1701	}
1702
1703	static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1704	struct neighbour *n)
1705	{
1706	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1707
1708	if (!wops->port_neigh_destroy)
1709	return -EOPNOTSUPP;
1710	return wops->port_neigh_destroy(rocker_port, n);
1711	}
1712
1713	static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1714	const unsigned char *addr,
1715	__be16 vlan_id)
1716	{
1717	struct rocker_world_ops *wops = rocker_port->rocker->wops;
1718
1719	if (!wops->port_ev_mac_vlan_seen)
1720	return -EOPNOTSUPP;
1721	return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1722	}
1723
1724	static int rocker_world_fib4_add(struct rocker *rocker,
1725	const struct fib_entry_notifier_info *fen_info)
1726	{
1727	struct rocker_world_ops *wops = rocker->wops;
1728
1729	if (!wops->fib4_add)
1730	return 0;
1731	return wops->fib4_add(rocker, fen_info);
1732	}
1733
1734	static int rocker_world_fib4_del(struct rocker *rocker,
1735	const struct fib_entry_notifier_info *fen_info)
1736	{
1737	struct rocker_world_ops *wops = rocker->wops;
1738
1739	if (!wops->fib4_del)
1740	return 0;
1741	return wops->fib4_del(rocker, fen_info);
1742	}
1743
1744	static void rocker_world_fib4_abort(struct rocker *rocker)
1745	{
1746	struct rocker_world_ops *wops = rocker->wops;
1747
1748	if (wops->fib4_abort)
1749	wops->fib4_abort(rocker);
1750	}
1751
1752	/*****************
1753	* Net device ops
1754	*****************/
1755
1756	static int rocker_port_open(struct net_device *dev)
1757	{
1758	struct rocker_port *rocker_port = netdev_priv(dev);
1759	int err;
1760
1761	err = rocker_port_dma_rings_init(rocker_port);
1762	if (err)
1763	return err;
1764
1765	err = request_irq(irq: rocker_msix_tx_vector(rocker_port),
1766	handler: rocker_tx_irq_handler, flags: 0,
1767	name: rocker_driver_name, dev: rocker_port);
1768	if (err) {
1769	netdev_err(dev: rocker_port->dev, format: "cannot assign tx irq\n");
1770	goto err_request_tx_irq;
1771	}
1772
1773	err = request_irq(irq: rocker_msix_rx_vector(rocker_port),
1774	handler: rocker_rx_irq_handler, flags: 0,
1775	name: rocker_driver_name, dev: rocker_port);
1776	if (err) {
1777	netdev_err(dev: rocker_port->dev, format: "cannot assign rx irq\n");
1778	goto err_request_rx_irq;
1779	}
1780
1781	err = rocker_world_port_open(rocker_port);
1782	if (err) {
1783	netdev_err(dev: rocker_port->dev, format: "cannot open port in world\n");
1784	goto err_world_port_open;
1785	}
1786
1787	napi_enable(n: &rocker_port->napi_tx);
1788	napi_enable(n: &rocker_port->napi_rx);
1789	if (!dev->proto_down)
1790	rocker_port_set_enable(rocker_port, enable: true);
1791	netif_start_queue(dev);
1792	return 0;
1793
1794	err_world_port_open:
1795	free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1796	err_request_rx_irq:
1797	free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1798	err_request_tx_irq:
1799	rocker_port_dma_rings_fini(rocker_port);
1800	return err;
1801	}
1802
1803	static int rocker_port_stop(struct net_device *dev)
1804	{
1805	struct rocker_port *rocker_port = netdev_priv(dev);
1806
1807	netif_stop_queue(dev);
1808	rocker_port_set_enable(rocker_port, enable: false);
1809	napi_disable(n: &rocker_port->napi_rx);
1810	napi_disable(n: &rocker_port->napi_tx);
1811	rocker_world_port_stop(rocker_port);
1812	free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1813	free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1814	rocker_port_dma_rings_fini(rocker_port);
1815
1816	return 0;
1817	}
1818
1819	static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1820	const struct rocker_desc_info *desc_info)
1821	{
1822	const struct rocker *rocker = rocker_port->rocker;
1823	struct pci_dev *pdev = rocker->pdev;
1824	const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1825	struct rocker_tlv *attr;
1826	int rem;
1827
1828	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_TX_MAX, desc_info);
1829	if (!attrs[ROCKER_TLV_TX_FRAGS])
1830	return;
1831	rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1832	const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1833	dma_addr_t dma_handle;
1834	size_t len;
1835
1836	if (rocker_tlv_type(tlv: attr) != ROCKER_TLV_TX_FRAG)
1837	continue;
1838	rocker_tlv_parse_nested(tb: frag_attrs, maxtype: ROCKER_TLV_TX_FRAG_ATTR_MAX,
1839	tlv: attr);
1840	if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1841	!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1842	continue;
1843	dma_handle = rocker_tlv_get_u64(tlv: frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1844	len = rocker_tlv_get_u16(tlv: frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1845	dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1846	}
1847	}
1848
1849	static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1850	struct rocker_desc_info *desc_info,
1851	char *buf, size_t buf_len)
1852	{
1853	const struct rocker *rocker = rocker_port->rocker;
1854	struct pci_dev *pdev = rocker->pdev;
1855	dma_addr_t dma_handle;
1856	struct rocker_tlv *frag;
1857
1858	dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1859	if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1860	if (net_ratelimit())
1861	netdev_err(dev: rocker_port->dev, format: "failed to dma map tx frag\n");
1862	return -EIO;
1863	}
1864	frag = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_TX_FRAG);
1865	if (!frag)
1866	goto unmap_frag;
1867	if (rocker_tlv_put_u64(desc_info, attrtype: ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1868	value: dma_handle))
1869	goto nest_cancel;
1870	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_TX_FRAG_ATTR_LEN,
1871	value: buf_len))
1872	goto nest_cancel;
1873	rocker_tlv_nest_end(desc_info, start: frag);
1874	return 0;
1875
1876	nest_cancel:
1877	rocker_tlv_nest_cancel(desc_info, start: frag);
1878	unmap_frag:
1879	dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1880	return -EMSGSIZE;
1881	}
1882
1883	static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1884	{
1885	struct rocker_port *rocker_port = netdev_priv(dev);
1886	struct rocker *rocker = rocker_port->rocker;
1887	struct rocker_desc_info *desc_info;
1888	struct rocker_tlv *frags;
1889	int i;
1890	int err;
1891
1892	desc_info = rocker_desc_head_get(info: &rocker_port->tx_ring);
1893	if (unlikely(!desc_info)) {
1894	if (net_ratelimit())
1895	netdev_err(dev, format: "tx ring full when queue awake\n");
1896	return NETDEV_TX_BUSY;
1897	}
1898
1899	rocker_desc_cookie_ptr_set(desc_info, ptr: skb);
1900
1901	frags = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_TX_FRAGS);
1902	if (!frags)
1903	goto out;
1904	err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1905	buf: skb->data, buf_len: skb_headlen(skb));
1906	if (err)
1907	goto nest_cancel;
1908	if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1909	err = skb_linearize(skb);
1910	if (err)
1911	goto unmap_frags;
1912	}
1913
1914	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1915	const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1916
1917	err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1918	buf: skb_frag_address(frag),
1919	buf_len: skb_frag_size(frag));
1920	if (err)
1921	goto unmap_frags;
1922	}
1923	rocker_tlv_nest_end(desc_info, start: frags);
1924
1925	rocker_desc_gen_clear(desc_info);
1926	rocker_desc_head_set(rocker, info: &rocker_port->tx_ring, desc_info);
1927
1928	desc_info = rocker_desc_head_get(info: &rocker_port->tx_ring);
1929	if (!desc_info)
1930	netif_stop_queue(dev);
1931
1932	return NETDEV_TX_OK;
1933
1934	unmap_frags:
1935	rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1936	nest_cancel:
1937	rocker_tlv_nest_cancel(desc_info, start: frags);
1938	out:
1939	dev_kfree_skb(skb);
1940	dev->stats.tx_dropped++;
1941
1942	return NETDEV_TX_OK;
1943	}
1944
1945	static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1946	{
1947	struct sockaddr *addr = p;
1948	struct rocker_port *rocker_port = netdev_priv(dev);
1949	int err;
1950
1951	if (!is_valid_ether_addr(addr: addr->sa_data))
1952	return -EADDRNOTAVAIL;
1953
1954	err = rocker_cmd_set_port_settings_macaddr(rocker_port, macaddr: addr->sa_data);
1955	if (err)
1956	return err;
1957	eth_hw_addr_set(dev, addr: addr->sa_data);
1958	return 0;
1959	}
1960
1961	static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1962	{
1963	struct rocker_port *rocker_port = netdev_priv(dev);
1964	int running = netif_running(dev);
1965	int err;
1966
1967	if (running)
1968	rocker_port_stop(dev);
1969
1970	netdev_info(dev, format: "MTU change from %d to %d\n", dev->mtu, new_mtu);
1971	dev->mtu = new_mtu;
1972
1973	err = rocker_cmd_set_port_settings_mtu(rocker_port, mtu: new_mtu);
1974	if (err)
1975	return err;
1976
1977	if (running)
1978	err = rocker_port_open(dev);
1979
1980	return err;
1981	}
1982
1983	static int rocker_port_get_phys_port_name(struct net_device *dev,
1984	char *buf, size_t len)
1985	{
1986	struct rocker_port *rocker_port = netdev_priv(dev);
1987	struct port_name name = { .buf = buf, .len = len };
1988	int err;
1989
1990	err = rocker_cmd_exec(rocker_port, nowait: false,
1991	prepare: rocker_cmd_get_port_settings_prep, NULL,
1992	process: rocker_cmd_get_port_settings_phys_name_proc,
1993	process_priv: &name);
1994
1995	return err ? -EOPNOTSUPP : 0;
1996	}
1997
1998	static void rocker_port_neigh_destroy(struct net_device *dev,
1999	struct neighbour *n)
2000	{
2001	struct rocker_port *rocker_port = netdev_priv(dev: n->dev);
2002	int err;
2003
2004	err = rocker_world_port_neigh_destroy(rocker_port, n);
2005	if (err)
2006	netdev_warn(dev: rocker_port->dev, format: "failed to handle neigh destroy (err %d)\n",
2007	err);
2008	}
2009
2010	static int rocker_port_get_port_parent_id(struct net_device *dev,
2011	struct netdev_phys_item_id *ppid)
2012	{
2013	const struct rocker_port *rocker_port = netdev_priv(dev);
2014	const struct rocker *rocker = rocker_port->rocker;
2015
2016	ppid->id_len = sizeof(rocker->hw.id);
2017	memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2018
2019	return 0;
2020	}
2021
2022	static const struct net_device_ops rocker_port_netdev_ops = {
2023	.ndo_open = rocker_port_open,
2024	.ndo_stop = rocker_port_stop,
2025	.ndo_start_xmit = rocker_port_xmit,
2026	.ndo_set_mac_address = rocker_port_set_mac_address,
2027	.ndo_change_mtu = rocker_port_change_mtu,
2028	.ndo_get_phys_port_name = rocker_port_get_phys_port_name,
2029	.ndo_neigh_destroy = rocker_port_neigh_destroy,
2030	.ndo_get_port_parent_id = rocker_port_get_port_parent_id,
2031	};
2032
2033	/********************
2034	* swdev interface
2035	********************/
2036
2037	static int rocker_port_attr_set(struct net_device *dev,
2038	const struct switchdev_attr *attr)
2039	{
2040	struct rocker_port *rocker_port = netdev_priv(dev);
2041	int err = 0;
2042
2043	switch (attr->id) {
2044	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2045	err = rocker_world_port_attr_stp_state_set(rocker_port,
2046	state: attr->u.stp_state);
2047	break;
2048	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2049	err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2050	flags: attr->u.brport_flags);
2051	break;
2052	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2053	err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2054	flags: attr->u.brport_flags);
2055	break;
2056	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2057	err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2058	ageing_time: attr->u.ageing_time);
2059	break;
2060	default:
2061	err = -EOPNOTSUPP;
2062	break;
2063	}
2064
2065	return err;
2066	}
2067
2068	static int rocker_port_obj_add(struct net_device *dev,
2069	const struct switchdev_obj *obj)
2070	{
2071	struct rocker_port *rocker_port = netdev_priv(dev);
2072	int err = 0;
2073
2074	switch (obj->id) {
2075	case SWITCHDEV_OBJ_ID_PORT_VLAN:
2076	err = rocker_world_port_obj_vlan_add(rocker_port,
2077	SWITCHDEV_OBJ_PORT_VLAN(obj));
2078	break;
2079	default:
2080	err = -EOPNOTSUPP;
2081	break;
2082	}
2083
2084	return err;
2085	}
2086
2087	static int rocker_port_obj_del(struct net_device *dev,
2088	const struct switchdev_obj *obj)
2089	{
2090	struct rocker_port *rocker_port = netdev_priv(dev);
2091	int err = 0;
2092
2093	switch (obj->id) {
2094	case SWITCHDEV_OBJ_ID_PORT_VLAN:
2095	err = rocker_world_port_obj_vlan_del(rocker_port,
2096	SWITCHDEV_OBJ_PORT_VLAN(obj));
2097	break;
2098	default:
2099	err = -EOPNOTSUPP;
2100	break;
2101	}
2102
2103	return err;
2104	}
2105
2106	struct rocker_fib_event_work {
2107	struct work_struct work;
2108	union {
2109	struct fib_entry_notifier_info fen_info;
2110	struct fib_rule_notifier_info fr_info;
2111	};
2112	struct rocker *rocker;
2113	unsigned long event;
2114	};
2115
2116	static void rocker_router_fib_event_work(struct work_struct *work)
2117	{
2118	struct rocker_fib_event_work *fib_work =
2119	container_of(work, struct rocker_fib_event_work, work);
2120	struct rocker *rocker = fib_work->rocker;
2121	struct fib_rule *rule;
2122	int err;
2123
2124	/* Protect internal structures from changes */
2125	rtnl_lock();
2126	switch (fib_work->event) {
2127	case FIB_EVENT_ENTRY_REPLACE:
2128	err = rocker_world_fib4_add(rocker, fen_info: &fib_work->fen_info);
2129	if (err)
2130	rocker_world_fib4_abort(rocker);
2131	fib_info_put(fi: fib_work->fen_info.fi);
2132	break;
2133	case FIB_EVENT_ENTRY_DEL:
2134	rocker_world_fib4_del(rocker, fen_info: &fib_work->fen_info);
2135	fib_info_put(fi: fib_work->fen_info.fi);
2136	break;
2137	case FIB_EVENT_RULE_ADD:
2138	case FIB_EVENT_RULE_DEL:
2139	rule = fib_work->fr_info.rule;
2140	if (!fib4_rule_default(rule))
2141	rocker_world_fib4_abort(rocker);
2142	fib_rule_put(rule);
2143	break;
2144	}
2145	rtnl_unlock();
2146	kfree(objp: fib_work);
2147	}
2148
2149	/* Called with rcu_read_lock() */
2150	static int rocker_router_fib_event(struct notifier_block *nb,
2151	unsigned long event, void *ptr)
2152	{
2153	struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2154	struct rocker_fib_event_work *fib_work;
2155	struct fib_notifier_info *info = ptr;
2156
2157	if (info->family != AF_INET)
2158	return NOTIFY_DONE;
2159
2160	fib_work = kzalloc(size: sizeof(*fib_work), GFP_ATOMIC);
2161	if (WARN_ON(!fib_work))
2162	return NOTIFY_BAD;
2163
2164	INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2165	fib_work->rocker = rocker;
2166	fib_work->event = event;
2167
2168	switch (event) {
2169	case FIB_EVENT_ENTRY_REPLACE:
2170	case FIB_EVENT_ENTRY_DEL:
2171	if (info->family == AF_INET) {
2172	struct fib_entry_notifier_info *fen_info = ptr;
2173
2174	if (fen_info->fi->fib_nh_is_v6) {
2175	NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2176	kfree(objp: fib_work);
2177	return notifier_from_errno(err: -EINVAL);
2178	}
2179	if (fen_info->fi->nh) {
2180	NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2181	kfree(objp: fib_work);
2182	return notifier_from_errno(err: -EINVAL);
2183	}
2184	}
2185
2186	memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2187	/* Take referece on fib_info to prevent it from being
2188	* freed while work is queued. Release it afterwards.
2189	*/
2190	fib_info_hold(fi: fib_work->fen_info.fi);
2191	break;
2192	case FIB_EVENT_RULE_ADD:
2193	case FIB_EVENT_RULE_DEL:
2194	memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2195	fib_rule_get(rule: fib_work->fr_info.rule);
2196	break;
2197	}
2198
2199	queue_work(wq: rocker->rocker_owq, work: &fib_work->work);
2200
2201	return NOTIFY_DONE;
2202	}
2203
2204	/********************
2205	* ethtool interface
2206	********************/
2207
2208	static int
2209	rocker_port_get_link_ksettings(struct net_device *dev,
2210	struct ethtool_link_ksettings *ecmd)
2211	{
2212	struct rocker_port *rocker_port = netdev_priv(dev);
2213
2214	return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2215	}
2216
2217	static int
2218	rocker_port_set_link_ksettings(struct net_device *dev,
2219	const struct ethtool_link_ksettings *ecmd)
2220	{
2221	struct rocker_port *rocker_port = netdev_priv(dev);
2222
2223	return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2224	}
2225
2226	static void rocker_port_get_drvinfo(struct net_device *dev,
2227	struct ethtool_drvinfo *drvinfo)
2228	{
2229	strscpy(p: drvinfo->driver, q: rocker_driver_name, size: sizeof(drvinfo->driver));
2230	strscpy(p: drvinfo->version, UTS_RELEASE, size: sizeof(drvinfo->version));
2231	}
2232
2233	static struct rocker_port_stats {
2234	char str[ETH_GSTRING_LEN];
2235	int type;
2236	} rocker_port_stats[] = {
2237	{ "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS, },
2238	{ "rx_bytes", ROCKER_TLV_CMD_PORT_STATS_RX_BYTES, },
2239	{ "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2240	{ "rx_errors", ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS, },
2241
2242	{ "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS, },
2243	{ "tx_bytes", ROCKER_TLV_CMD_PORT_STATS_TX_BYTES, },
2244	{ "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2245	{ "tx_errors", ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS, },
2246	};
2247
2248	#define ROCKER_PORT_STATS_LEN ARRAY_SIZE(rocker_port_stats)
2249
2250	static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2251	u8 *data)
2252	{
2253	u8 *p = data;
2254	int i;
2255
2256	switch (stringset) {
2257	case ETH_SS_STATS:
2258	for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2259	memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2260	p += ETH_GSTRING_LEN;
2261	}
2262	break;
2263	}
2264	}
2265
2266	static int
2267	rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2268	struct rocker_desc_info *desc_info,
2269	void *priv)
2270	{
2271	struct rocker_tlv *cmd_stats;
2272
2273	if (rocker_tlv_put_u16(desc_info, attrtype: ROCKER_TLV_CMD_TYPE,
2274	value: ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2275	return -EMSGSIZE;
2276
2277	cmd_stats = rocker_tlv_nest_start(desc_info, attrtype: ROCKER_TLV_CMD_INFO);
2278	if (!cmd_stats)
2279	return -EMSGSIZE;
2280
2281	if (rocker_tlv_put_u32(desc_info, attrtype: ROCKER_TLV_CMD_PORT_STATS_PPORT,
2282	value: rocker_port->pport))
2283	return -EMSGSIZE;
2284
2285	rocker_tlv_nest_end(desc_info, start: cmd_stats);
2286
2287	return 0;
2288	}
2289
2290	static int
2291	rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2292	const struct rocker_desc_info *desc_info,
2293	void *priv)
2294	{
2295	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2296	const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2297	const struct rocker_tlv *pattr;
2298	u32 pport;
2299	u64 *data = priv;
2300	int i;
2301
2302	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_CMD_MAX, desc_info);
2303
2304	if (!attrs[ROCKER_TLV_CMD_INFO])
2305	return -EIO;
2306
2307	rocker_tlv_parse_nested(tb: stats_attrs, maxtype: ROCKER_TLV_CMD_PORT_STATS_MAX,
2308	tlv: attrs[ROCKER_TLV_CMD_INFO]);
2309
2310	if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2311	return -EIO;
2312
2313	pport = rocker_tlv_get_u32(tlv: stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2314	if (pport != rocker_port->pport)
2315	return -EIO;
2316
2317	for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2318	pattr = stats_attrs[rocker_port_stats[i].type];
2319	if (!pattr)
2320	continue;
2321
2322	data[i] = rocker_tlv_get_u64(tlv: pattr);
2323	}
2324
2325	return 0;
2326	}
2327
2328	static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2329	void *priv)
2330	{
2331	return rocker_cmd_exec(rocker_port, nowait: false,
2332	prepare: rocker_cmd_get_port_stats_prep, NULL,
2333	process: rocker_cmd_get_port_stats_ethtool_proc,
2334	process_priv: priv);
2335	}
2336
2337	static void rocker_port_get_stats(struct net_device *dev,
2338	struct ethtool_stats *stats, u64 *data)
2339	{
2340	struct rocker_port *rocker_port = netdev_priv(dev);
2341
2342	if (rocker_cmd_get_port_stats_ethtool(rocker_port, priv: data) != 0) {
2343	int i;
2344
2345	for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2346	data[i] = 0;
2347	}
2348	}
2349
2350	static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2351	{
2352	switch (sset) {
2353	case ETH_SS_STATS:
2354	return ROCKER_PORT_STATS_LEN;
2355	default:
2356	return -EOPNOTSUPP;
2357	}
2358	}
2359
2360	static const struct ethtool_ops rocker_port_ethtool_ops = {
2361	.get_drvinfo = rocker_port_get_drvinfo,
2362	.get_link = ethtool_op_get_link,
2363	.get_strings = rocker_port_get_strings,
2364	.get_ethtool_stats = rocker_port_get_stats,
2365	.get_sset_count = rocker_port_get_sset_count,
2366	.get_link_ksettings = rocker_port_get_link_ksettings,
2367	.set_link_ksettings = rocker_port_set_link_ksettings,
2368	};
2369
2370	/*****************
2371	* NAPI interface
2372	*****************/
2373
2374	static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2375	{
2376	return container_of(napi, struct rocker_port, napi_tx);
2377	}
2378
2379	static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2380	{
2381	struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2382	const struct rocker *rocker = rocker_port->rocker;
2383	const struct rocker_desc_info *desc_info;
2384	u32 credits = 0;
2385	int err;
2386
2387	/* Cleanup tx descriptors */
2388	while ((desc_info = rocker_desc_tail_get(info: &rocker_port->tx_ring))) {
2389	struct sk_buff *skb;
2390
2391	err = rocker_desc_err(desc_info);
2392	if (err && net_ratelimit())
2393	netdev_err(dev: rocker_port->dev, format: "tx desc received with err %d\n",
2394	err);
2395	rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2396
2397	skb = rocker_desc_cookie_ptr_get(desc_info);
2398	if (err == 0) {
2399	rocker_port->dev->stats.tx_packets++;
2400	rocker_port->dev->stats.tx_bytes += skb->len;
2401	} else {
2402	rocker_port->dev->stats.tx_errors++;
2403	}
2404
2405	dev_kfree_skb_any(skb);
2406	credits++;
2407	}
2408
2409	if (credits && netif_queue_stopped(dev: rocker_port->dev))
2410	netif_wake_queue(dev: rocker_port->dev);
2411
2412	napi_complete(n: napi);
2413	rocker_dma_ring_credits_set(rocker, info: &rocker_port->tx_ring, credits);
2414
2415	return 0;
2416	}
2417
2418	static int rocker_port_rx_proc(const struct rocker *rocker,
2419	const struct rocker_port *rocker_port,
2420	struct rocker_desc_info *desc_info)
2421	{
2422	const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2423	struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2424	size_t rx_len;
2425	u16 rx_flags = 0;
2426
2427	if (!skb)
2428	return -ENOENT;
2429
2430	rocker_tlv_parse_desc(tb: attrs, maxtype: ROCKER_TLV_RX_MAX, desc_info);
2431	if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2432	return -EINVAL;
2433	if (attrs[ROCKER_TLV_RX_FLAGS])
2434	rx_flags = rocker_tlv_get_u16(tlv: attrs[ROCKER_TLV_RX_FLAGS]);
2435
2436	rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2437
2438	rx_len = rocker_tlv_get_u16(tlv: attrs[ROCKER_TLV_RX_FRAG_LEN]);
2439	skb_put(skb, len: rx_len);
2440	skb->protocol = eth_type_trans(skb, dev: rocker_port->dev);
2441
2442	if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2443	skb->offload_fwd_mark = 1;
2444
2445	rocker_port->dev->stats.rx_packets++;
2446	rocker_port->dev->stats.rx_bytes += skb->len;
2447
2448	netif_receive_skb(skb);
2449
2450	return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2451	}
2452
2453	static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2454	{
2455	return container_of(napi, struct rocker_port, napi_rx);
2456	}
2457
2458	static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2459	{
2460	struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2461	const struct rocker *rocker = rocker_port->rocker;
2462	struct rocker_desc_info *desc_info;
2463	u32 credits = 0;
2464	int err;
2465
2466	/* Process rx descriptors */
2467	while (credits < budget &&
2468	(desc_info = rocker_desc_tail_get(info: &rocker_port->rx_ring))) {
2469	err = rocker_desc_err(desc_info);
2470	if (err) {
2471	if (net_ratelimit())
2472	netdev_err(dev: rocker_port->dev, format: "rx desc received with err %d\n",
2473	err);
2474	} else {
2475	err = rocker_port_rx_proc(rocker, rocker_port,
2476	desc_info);
2477	if (err && net_ratelimit())
2478	netdev_err(dev: rocker_port->dev, format: "rx processing failed with err %d\n",
2479	err);
2480	}
2481	if (err)
2482	rocker_port->dev->stats.rx_errors++;
2483
2484	rocker_desc_gen_clear(desc_info);
2485	rocker_desc_head_set(rocker, info: &rocker_port->rx_ring, desc_info);
2486	credits++;
2487	}
2488
2489	if (credits < budget)
2490	napi_complete_done(n: napi, work_done: credits);
2491
2492	rocker_dma_ring_credits_set(rocker, info: &rocker_port->rx_ring, credits);
2493
2494	return credits;
2495	}
2496
2497	/*****************
2498	* PCI driver ops
2499	*****************/
2500
2501	static void rocker_carrier_init(const struct rocker_port *rocker_port)
2502	{
2503	const struct rocker *rocker = rocker_port->rocker;
2504	u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2505	bool link_up;
2506
2507	link_up = link_status & (1 << rocker_port->pport);
2508	if (link_up)
2509	netif_carrier_on(dev: rocker_port->dev);
2510	else
2511	netif_carrier_off(dev: rocker_port->dev);
2512	}
2513
2514	static void rocker_remove_ports(struct rocker *rocker)
2515	{
2516	struct rocker_port *rocker_port;
2517	int i;
2518
2519	for (i = 0; i < rocker->port_count; i++) {
2520	rocker_port = rocker->ports[i];
2521	if (!rocker_port)
2522	continue;
2523	rocker_world_port_fini(rocker_port);
2524	unregister_netdev(dev: rocker_port->dev);
2525	rocker_world_port_post_fini(rocker_port);
2526	free_netdev(dev: rocker_port->dev);
2527	}
2528	rocker_world_fini(rocker);
2529	kfree(objp: rocker->ports);
2530	}
2531
2532	static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2533	{
2534	const struct rocker *rocker = rocker_port->rocker;
2535	const struct pci_dev *pdev = rocker->pdev;
2536	u8 addr[ETH_ALEN];
2537	int err;
2538
2539	err = rocker_cmd_get_port_settings_macaddr(rocker_port, macaddr: addr);
2540	if (!err) {
2541	eth_hw_addr_set(dev: rocker_port->dev, addr);
2542	} else {
2543	dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2544	eth_hw_addr_random(dev: rocker_port->dev);
2545	}
2546	}
2547
2548	#define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
2549	#define ROCKER_PORT_MAX_MTU 9000
2550	static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2551	{
2552	struct pci_dev *pdev = rocker->pdev;
2553	struct rocker_port *rocker_port;
2554	struct net_device *dev;
2555	int err;
2556
2557	dev = alloc_etherdev(sizeof(struct rocker_port));
2558	if (!dev)
2559	return -ENOMEM;
2560	SET_NETDEV_DEV(dev, &pdev->dev);
2561	rocker_port = netdev_priv(dev);
2562	rocker_port->dev = dev;
2563	rocker_port->rocker = rocker;
2564	rocker_port->port_number = port_number;
2565	rocker_port->pport = port_number + 1;
2566
2567	err = rocker_world_check_init(rocker_port);
2568	if (err) {
2569	dev_err(&pdev->dev, "world init failed\n");
2570	goto err_world_check_init;
2571	}
2572
2573	rocker_port_dev_addr_init(rocker_port);
2574	dev->netdev_ops = &rocker_port_netdev_ops;
2575	dev->ethtool_ops = &rocker_port_ethtool_ops;
2576	netif_napi_add_tx(dev, napi: &rocker_port->napi_tx, poll: rocker_port_poll_tx);
2577	netif_napi_add(dev, napi: &rocker_port->napi_rx, poll: rocker_port_poll_rx);
2578	rocker_carrier_init(rocker_port);
2579
2580	dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2581
2582	/* MTU range: 68 - 9000 */
2583	dev->min_mtu = ROCKER_PORT_MIN_MTU;
2584	dev->max_mtu = ROCKER_PORT_MAX_MTU;
2585
2586	err = rocker_world_port_pre_init(rocker_port);
2587	if (err) {
2588	dev_err(&pdev->dev, "port world pre-init failed\n");
2589	goto err_world_port_pre_init;
2590	}
2591	err = register_netdev(dev);
2592	if (err) {
2593	dev_err(&pdev->dev, "register_netdev failed\n");
2594	goto err_register_netdev;
2595	}
2596	rocker->ports[port_number] = rocker_port;
2597
2598	err = rocker_world_port_init(rocker_port);
2599	if (err) {
2600	dev_err(&pdev->dev, "port world init failed\n");
2601	goto err_world_port_init;
2602	}
2603
2604	return 0;
2605
2606	err_world_port_init:
2607	rocker->ports[port_number] = NULL;
2608	unregister_netdev(dev);
2609	err_register_netdev:
2610	rocker_world_port_post_fini(rocker_port);
2611	err_world_port_pre_init:
2612	err_world_check_init:
2613	free_netdev(dev);
2614	return err;
2615	}
2616
2617	static int rocker_probe_ports(struct rocker *rocker)
2618	{
2619	int i;
2620	size_t alloc_size;
2621	int err;
2622
2623	alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2624	rocker->ports = kzalloc(size: alloc_size, GFP_KERNEL);
2625	if (!rocker->ports)
2626	return -ENOMEM;
2627	for (i = 0; i < rocker->port_count; i++) {
2628	err = rocker_probe_port(rocker, port_number: i);
2629	if (err)
2630	goto remove_ports;
2631	}
2632	return 0;
2633
2634	remove_ports:
2635	rocker_remove_ports(rocker);
2636	return err;
2637	}
2638
2639	static int rocker_msix_init(struct rocker *rocker)
2640	{
2641	struct pci_dev *pdev = rocker->pdev;
2642	int msix_entries;
2643	int i;
2644	int err;
2645
2646	msix_entries = pci_msix_vec_count(dev: pdev);
2647	if (msix_entries < 0)
2648	return msix_entries;
2649
2650	if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2651	return -EINVAL;
2652
2653	rocker->msix_entries = kmalloc_array(n: msix_entries,
2654	size: sizeof(struct msix_entry),
2655	GFP_KERNEL);
2656	if (!rocker->msix_entries)
2657	return -ENOMEM;
2658
2659	for (i = 0; i < msix_entries; i++)
2660	rocker->msix_entries[i].entry = i;
2661
2662	err = pci_enable_msix_exact(dev: pdev, entries: rocker->msix_entries, nvec: msix_entries);
2663	if (err < 0)
2664	goto err_enable_msix;
2665
2666	return 0;
2667
2668	err_enable_msix:
2669	kfree(objp: rocker->msix_entries);
2670	return err;
2671	}
2672
2673	static void rocker_msix_fini(const struct rocker *rocker)
2674	{
2675	pci_disable_msix(dev: rocker->pdev);
2676	kfree(objp: rocker->msix_entries);
2677	}
2678
2679	static bool rocker_port_dev_check(const struct net_device *dev)
2680	{
2681	return dev->netdev_ops == &rocker_port_netdev_ops;
2682	}
2683
2684	static int
2685	rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2686	struct switchdev_notifier_port_attr_info *port_attr_info)
2687	{
2688	int err;
2689
2690	err = rocker_port_attr_set(dev: netdev, attr: port_attr_info->attr);
2691
2692	port_attr_info->handled = true;
2693	return notifier_from_errno(err);
2694	}
2695
2696	struct rocker_switchdev_event_work {
2697	struct work_struct work;
2698	struct switchdev_notifier_fdb_info fdb_info;
2699	struct rocker_port *rocker_port;
2700	unsigned long event;
2701	};
2702
2703	static void
2704	rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2705	struct switchdev_notifier_fdb_info *recv_info)
2706	{
2707	struct switchdev_notifier_fdb_info info = {};
2708
2709	info.addr = recv_info->addr;
2710	info.vid = recv_info->vid;
2711	info.offloaded = true;
2712	call_switchdev_notifiers(val: SWITCHDEV_FDB_OFFLOADED,
2713	dev: rocker_port->dev, info: &info.info, NULL);
2714	}
2715
2716	static void rocker_switchdev_event_work(struct work_struct *work)
2717	{
2718	struct rocker_switchdev_event_work *switchdev_work =
2719	container_of(work, struct rocker_switchdev_event_work, work);
2720	struct rocker_port *rocker_port = switchdev_work->rocker_port;
2721	struct switchdev_notifier_fdb_info *fdb_info;
2722	int err;
2723
2724	rtnl_lock();
2725	switch (switchdev_work->event) {
2726	case SWITCHDEV_FDB_ADD_TO_DEVICE:
2727	fdb_info = &switchdev_work->fdb_info;
2728	if (!fdb_info->added_by_user || fdb_info->is_local)
2729	break;
2730	err = rocker_world_port_fdb_add(rocker_port, info: fdb_info);
2731	if (err) {
2732	netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2733	break;
2734	}
2735	rocker_fdb_offload_notify(rocker_port, recv_info: fdb_info);
2736	break;
2737	case SWITCHDEV_FDB_DEL_TO_DEVICE:
2738	fdb_info = &switchdev_work->fdb_info;
2739	if (!fdb_info->added_by_user || fdb_info->is_local)
2740	break;
2741	err = rocker_world_port_fdb_del(rocker_port, info: fdb_info);
2742	if (err)
2743	netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744	break;
2745	}
2746	rtnl_unlock();
2747
2748	kfree(objp: switchdev_work->fdb_info.addr);
2749	kfree(objp: switchdev_work);
2750	dev_put(dev: rocker_port->dev);
2751	}
2752
2753	/* called under rcu_read_lock() */
2754	static int rocker_switchdev_event(struct notifier_block *unused,
2755	unsigned long event, void *ptr)
2756	{
2757	struct net_device *dev = switchdev_notifier_info_to_dev(info: ptr);
2758	struct rocker_switchdev_event_work *switchdev_work;
2759	struct switchdev_notifier_fdb_info *fdb_info = ptr;
2760	struct rocker_port *rocker_port;
2761
2762	if (!rocker_port_dev_check(dev))
2763	return NOTIFY_DONE;
2764
2765	if (event == SWITCHDEV_PORT_ATTR_SET)
2766	return rocker_switchdev_port_attr_set_event(netdev: dev, port_attr_info: ptr);
2767
2768	rocker_port = netdev_priv(dev);
2769	switchdev_work = kzalloc(size: sizeof(*switchdev_work), GFP_ATOMIC);
2770	if (WARN_ON(!switchdev_work))
2771	return NOTIFY_BAD;
2772
2773	INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2774	switchdev_work->rocker_port = rocker_port;
2775	switchdev_work->event = event;
2776
2777	switch (event) {
2778	case SWITCHDEV_FDB_ADD_TO_DEVICE:
2779	case SWITCHDEV_FDB_DEL_TO_DEVICE:
2780	memcpy(&switchdev_work->fdb_info, ptr,
2781	sizeof(switchdev_work->fdb_info));
2782	switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2783	if (unlikely(!switchdev_work->fdb_info.addr)) {
2784	kfree(objp: switchdev_work);
2785	return NOTIFY_BAD;
2786	}
2787
2788	ether_addr_copy(dst: (u8 *)switchdev_work->fdb_info.addr,
2789	src: fdb_info->addr);
2790	/* Take a reference on the rocker device */
2791	dev_hold(dev);
2792	break;
2793	default:
2794	kfree(objp: switchdev_work);
2795	return NOTIFY_DONE;
2796	}
2797
2798	queue_work(wq: rocker_port->rocker->rocker_owq,
2799	work: &switchdev_work->work);
2800	return NOTIFY_DONE;
2801	}
2802
2803	static int
2804	rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2805	struct switchdev_notifier_port_obj_info *port_obj_info)
2806	{
2807	int err = -EOPNOTSUPP;
2808
2809	switch (event) {
2810	case SWITCHDEV_PORT_OBJ_ADD:
2811	err = rocker_port_obj_add(dev: netdev, obj: port_obj_info->obj);
2812	break;
2813	case SWITCHDEV_PORT_OBJ_DEL:
2814	err = rocker_port_obj_del(dev: netdev, obj: port_obj_info->obj);
2815	break;
2816	}
2817
2818	port_obj_info->handled = true;
2819	return notifier_from_errno(err);
2820	}
2821
2822	static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2823	unsigned long event, void *ptr)
2824	{
2825	struct net_device *dev = switchdev_notifier_info_to_dev(info: ptr);
2826
2827	if (!rocker_port_dev_check(dev))
2828	return NOTIFY_DONE;
2829
2830	switch (event) {
2831	case SWITCHDEV_PORT_OBJ_ADD:
2832	case SWITCHDEV_PORT_OBJ_DEL:
2833	return rocker_switchdev_port_obj_event(event, netdev: dev, port_obj_info: ptr);
2834	case SWITCHDEV_PORT_ATTR_SET:
2835	return rocker_switchdev_port_attr_set_event(netdev: dev, port_attr_info: ptr);
2836	}
2837
2838	return NOTIFY_DONE;
2839	}
2840
2841	static struct notifier_block rocker_switchdev_notifier = {
2842	.notifier_call = rocker_switchdev_event,
2843	};
2844
2845	static struct notifier_block rocker_switchdev_blocking_notifier = {
2846	.notifier_call = rocker_switchdev_blocking_event,
2847	};
2848
2849	static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2850	{
2851	struct notifier_block *nb;
2852	struct rocker *rocker;
2853	int err;
2854
2855	rocker = kzalloc(size: sizeof(*rocker), GFP_KERNEL);
2856	if (!rocker)
2857	return -ENOMEM;
2858
2859	err = pci_enable_device(dev: pdev);
2860	if (err) {
2861	dev_err(&pdev->dev, "pci_enable_device failed\n");
2862	goto err_pci_enable_device;
2863	}
2864
2865	err = pci_request_regions(pdev, rocker_driver_name);
2866	if (err) {
2867	dev_err(&pdev->dev, "pci_request_regions failed\n");
2868	goto err_pci_request_regions;
2869	}
2870
2871	err = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(64));
2872	if (err) {
2873	dev_err(&pdev->dev, "dma_set_mask failed\n");
2874	goto err_pci_set_dma_mask;
2875	}
2876
2877	if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2878	dev_err(&pdev->dev, "invalid PCI region size\n");
2879	err = -EINVAL;
2880	goto err_pci_resource_len_check;
2881	}
2882
2883	rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2884	pci_resource_len(pdev, 0));
2885	if (!rocker->hw_addr) {
2886	dev_err(&pdev->dev, "ioremap failed\n");
2887	err = -EIO;
2888	goto err_ioremap;
2889	}
2890	pci_set_master(dev: pdev);
2891
2892	rocker->pdev = pdev;
2893	pci_set_drvdata(pdev, data: rocker);
2894
2895	rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2896
2897	err = rocker_msix_init(rocker);
2898	if (err) {
2899	dev_err(&pdev->dev, "MSI-X init failed\n");
2900	goto err_msix_init;
2901	}
2902
2903	err = rocker_basic_hw_test(rocker);
2904	if (err) {
2905	dev_err(&pdev->dev, "basic hw test failed\n");
2906	goto err_basic_hw_test;
2907	}
2908
2909	rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2910
2911	err = rocker_dma_rings_init(rocker);
2912	if (err)
2913	goto err_dma_rings_init;
2914
2915	err = request_irq(irq: rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_CMD),
2916	handler: rocker_cmd_irq_handler, flags: 0,
2917	name: rocker_driver_name, dev: rocker);
2918	if (err) {
2919	dev_err(&pdev->dev, "cannot assign cmd irq\n");
2920	goto err_request_cmd_irq;
2921	}
2922
2923	err = request_irq(irq: rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_EVENT),
2924	handler: rocker_event_irq_handler, flags: 0,
2925	name: rocker_driver_name, dev: rocker);
2926	if (err) {
2927	dev_err(&pdev->dev, "cannot assign event irq\n");
2928	goto err_request_event_irq;
2929	}
2930
2931	rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2932	WQ_MEM_RECLAIM);
2933	if (!rocker->rocker_owq) {
2934	err = -ENOMEM;
2935	goto err_alloc_ordered_workqueue;
2936	}
2937
2938	err = rocker_probe_ports(rocker);
2939	if (err) {
2940	dev_err(&pdev->dev, "failed to probe ports\n");
2941	goto err_probe_ports;
2942	}
2943
2944	/* Only FIBs pointing to our own netdevs are programmed into
2945	* the device, so no need to pass a callback.
2946	*/
2947	rocker->fib_nb.notifier_call = rocker_router_fib_event;
2948	err = register_fib_notifier(net: &init_net, nb: &rocker->fib_nb, NULL, NULL);
2949	if (err)
2950	goto err_register_fib_notifier;
2951
2952	err = register_switchdev_notifier(nb: &rocker_switchdev_notifier);
2953	if (err) {
2954	dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2955	goto err_register_switchdev_notifier;
2956	}
2957
2958	nb = &rocker_switchdev_blocking_notifier;
2959	err = register_switchdev_blocking_notifier(nb);
2960	if (err) {
2961	dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2962	goto err_register_switchdev_blocking_notifier;
2963	}
2964
2965	rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2966
2967	dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2968	(int)sizeof(rocker->hw.id), &rocker->hw.id);
2969
2970	return 0;
2971
2972	err_register_switchdev_blocking_notifier:
2973	unregister_switchdev_notifier(nb: &rocker_switchdev_notifier);
2974	err_register_switchdev_notifier:
2975	unregister_fib_notifier(net: &init_net, nb: &rocker->fib_nb);
2976	err_register_fib_notifier:
2977	rocker_remove_ports(rocker);
2978	err_probe_ports:
2979	destroy_workqueue(wq: rocker->rocker_owq);
2980	err_alloc_ordered_workqueue:
2981	free_irq(rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_EVENT), rocker);
2982	err_request_event_irq:
2983	free_irq(rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_CMD), rocker);
2984	err_request_cmd_irq:
2985	rocker_dma_rings_fini(rocker);
2986	err_dma_rings_init:
2987	err_basic_hw_test:
2988	rocker_msix_fini(rocker);
2989	err_msix_init:
2990	iounmap(addr: rocker->hw_addr);
2991	err_ioremap:
2992	err_pci_resource_len_check:
2993	err_pci_set_dma_mask:
2994	pci_release_regions(pdev);
2995	err_pci_request_regions:
2996	pci_disable_device(dev: pdev);
2997	err_pci_enable_device:
2998	kfree(objp: rocker);
2999	return err;
3000	}
3001
3002	static void rocker_remove(struct pci_dev *pdev)
3003	{
3004	struct rocker *rocker = pci_get_drvdata(pdev);
3005	struct notifier_block *nb;
3006
3007	nb = &rocker_switchdev_blocking_notifier;
3008	unregister_switchdev_blocking_notifier(nb);
3009
3010	unregister_switchdev_notifier(nb: &rocker_switchdev_notifier);
3011	unregister_fib_notifier(net: &init_net, nb: &rocker->fib_nb);
3012	rocker_remove_ports(rocker);
3013	rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3014	destroy_workqueue(wq: rocker->rocker_owq);
3015	free_irq(rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_EVENT), rocker);
3016	free_irq(rocker_msix_vector(rocker, vector: ROCKER_MSIX_VEC_CMD), rocker);
3017	rocker_dma_rings_fini(rocker);
3018	rocker_msix_fini(rocker);
3019	iounmap(addr: rocker->hw_addr);
3020	pci_release_regions(rocker->pdev);
3021	pci_disable_device(dev: rocker->pdev);
3022	kfree(objp: rocker);
3023	}
3024
3025	static struct pci_driver rocker_pci_driver = {
3026	.name = rocker_driver_name,
3027	.id_table = rocker_pci_id_table,
3028	.probe = rocker_probe,
3029	.remove = rocker_remove,
3030	};
3031
3032	/************************************
3033	* Net device notifier event handler
3034	************************************/
3035
3036	static bool rocker_port_dev_check_under(const struct net_device *dev,
3037	struct rocker *rocker)
3038	{
3039	struct rocker_port *rocker_port;
3040
3041	if (!rocker_port_dev_check(dev))
3042	return false;
3043
3044	rocker_port = netdev_priv(dev);
3045	if (rocker_port->rocker != rocker)
3046	return false;
3047
3048	return true;
3049	}
3050
3051	struct rocker_walk_data {
3052	struct rocker *rocker;
3053	struct rocker_port *port;
3054	};
3055
3056	static int rocker_lower_dev_walk(struct net_device *lower_dev,
3057	struct netdev_nested_priv *priv)
3058	{
3059	struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3060	int ret = 0;
3061
3062	if (rocker_port_dev_check_under(dev: lower_dev, rocker: data->rocker)) {
3063	data->port = netdev_priv(dev: lower_dev);
3064	ret = 1;
3065	}
3066
3067	return ret;
3068	}
3069
3070	struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3071	struct rocker *rocker)
3072	{
3073	struct netdev_nested_priv priv;
3074	struct rocker_walk_data data;
3075
3076	if (rocker_port_dev_check_under(dev, rocker))
3077	return netdev_priv(dev);
3078
3079	data.rocker = rocker;
3080	data.port = NULL;
3081	priv.data = (void *)&data;
3082	netdev_walk_all_lower_dev(dev, fn: rocker_lower_dev_walk, priv: &priv);
3083
3084	return data.port;
3085	}
3086
3087	static int rocker_netdevice_event(struct notifier_block *unused,
3088	unsigned long event, void *ptr)
3089	{
3090	struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(info: ptr);
3091	struct net_device *dev = netdev_notifier_info_to_dev(info: ptr);
3092	struct netdev_notifier_changeupper_info *info;
3093	struct rocker_port *rocker_port;
3094	int err;
3095
3096	if (!rocker_port_dev_check(dev))
3097	return NOTIFY_DONE;
3098
3099	switch (event) {
3100	case NETDEV_CHANGEUPPER:
3101	info = ptr;
3102	if (!info->master)
3103	goto out;
3104	rocker_port = netdev_priv(dev);
3105	if (info->linking) {
3106	err = rocker_world_port_master_linked(rocker_port,
3107	master: info->upper_dev,
3108	extack);
3109	if (err)
3110	netdev_warn(dev, format: "failed to reflect master linked (err %d)\n",
3111	err);
3112	} else {
3113	err = rocker_world_port_master_unlinked(rocker_port,
3114	master: info->upper_dev);
3115	if (err)
3116	netdev_warn(dev, format: "failed to reflect master unlinked (err %d)\n",
3117	err);
3118	}
3119	}
3120	out:
3121	return NOTIFY_DONE;
3122	}
3123
3124	static struct notifier_block rocker_netdevice_nb __read_mostly = {
3125	.notifier_call = rocker_netdevice_event,
3126	};
3127
3128	/************************************
3129	* Net event notifier event handler
3130	************************************/
3131
3132	static int rocker_netevent_event(struct notifier_block *unused,
3133	unsigned long event, void *ptr)
3134	{
3135	struct rocker_port *rocker_port;
3136	struct net_device *dev;
3137	struct neighbour *n = ptr;
3138	int err;
3139
3140	switch (event) {
3141	case NETEVENT_NEIGH_UPDATE:
3142	if (n->tbl != &arp_tbl)
3143	return NOTIFY_DONE;
3144	dev = n->dev;
3145	if (!rocker_port_dev_check(dev))
3146	return NOTIFY_DONE;
3147	rocker_port = netdev_priv(dev);
3148	err = rocker_world_port_neigh_update(rocker_port, n);
3149	if (err)
3150	netdev_warn(dev, format: "failed to handle neigh update (err %d)\n",
3151	err);
3152	break;
3153	}
3154
3155	return NOTIFY_DONE;
3156	}
3157
3158	static struct notifier_block rocker_netevent_nb __read_mostly = {
3159	.notifier_call = rocker_netevent_event,
3160	};
3161
3162	/***********************
3163	* Module init and exit
3164	***********************/
3165
3166	static int __init rocker_module_init(void)
3167	{
3168	int err;
3169
3170	register_netdevice_notifier(nb: &rocker_netdevice_nb);
3171	register_netevent_notifier(nb: &rocker_netevent_nb);
3172	err = pci_register_driver(&rocker_pci_driver);
3173	if (err)
3174	goto err_pci_register_driver;
3175	return 0;
3176
3177	err_pci_register_driver:
3178	unregister_netevent_notifier(nb: &rocker_netevent_nb);
3179	unregister_netdevice_notifier(nb: &rocker_netdevice_nb);
3180	return err;
3181	}
3182
3183	static void __exit rocker_module_exit(void)
3184	{
3185	unregister_netevent_notifier(nb: &rocker_netevent_nb);
3186	unregister_netdevice_notifier(nb: &rocker_netdevice_nb);
3187	pci_unregister_driver(dev: &rocker_pci_driver);
3188	}
3189
3190	module_init(rocker_module_init);
3191	module_exit(rocker_module_exit);
3192
3193	MODULE_LICENSE("GPL v2");
3194	MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3195	MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3196	MODULE_DESCRIPTION("Rocker switch device driver");
3197	MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
3198