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