linux/drivers/net/ethernet/rocker/rocker_main.c
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   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 = prandom_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 = prandom_u32();
 143        rnd <<= 31;
 144        rnd |= prandom_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        prandom_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{
1675        struct rocker_world_ops *wops = rocker_port->rocker->wops;
1676
1677        if (!wops->port_master_linked)
1678                return -EOPNOTSUPP;
1679        return wops->port_master_linked(rocker_port, master);
1680}
1681
1682static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1683                                             struct net_device *master)
1684{
1685        struct rocker_world_ops *wops = rocker_port->rocker->wops;
1686
1687        if (!wops->port_master_unlinked)
1688                return -EOPNOTSUPP;
1689        return wops->port_master_unlinked(rocker_port, master);
1690}
1691
1692static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1693                                          struct neighbour *n)
1694{
1695        struct rocker_world_ops *wops = rocker_port->rocker->wops;
1696
1697        if (!wops->port_neigh_update)
1698                return -EOPNOTSUPP;
1699        return wops->port_neigh_update(rocker_port, n);
1700}
1701
1702static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1703                                           struct neighbour *n)
1704{
1705        struct rocker_world_ops *wops = rocker_port->rocker->wops;
1706
1707        if (!wops->port_neigh_destroy)
1708                return -EOPNOTSUPP;
1709        return wops->port_neigh_destroy(rocker_port, n);
1710}
1711
1712static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1713                                              const unsigned char *addr,
1714                                              __be16 vlan_id)
1715{
1716        struct rocker_world_ops *wops = rocker_port->rocker->wops;
1717
1718        if (!wops->port_ev_mac_vlan_seen)
1719                return -EOPNOTSUPP;
1720        return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1721}
1722
1723static int rocker_world_fib4_add(struct rocker *rocker,
1724                                 const struct fib_entry_notifier_info *fen_info)
1725{
1726        struct rocker_world_ops *wops = rocker->wops;
1727
1728        if (!wops->fib4_add)
1729                return 0;
1730        return wops->fib4_add(rocker, fen_info);
1731}
1732
1733static int rocker_world_fib4_del(struct rocker *rocker,
1734                                 const struct fib_entry_notifier_info *fen_info)
1735{
1736        struct rocker_world_ops *wops = rocker->wops;
1737
1738        if (!wops->fib4_del)
1739                return 0;
1740        return wops->fib4_del(rocker, fen_info);
1741}
1742
1743static void rocker_world_fib4_abort(struct rocker *rocker)
1744{
1745        struct rocker_world_ops *wops = rocker->wops;
1746
1747        if (wops->fib4_abort)
1748                wops->fib4_abort(rocker);
1749}
1750
1751/*****************
1752 * Net device ops
1753 *****************/
1754
1755static int rocker_port_open(struct net_device *dev)
1756{
1757        struct rocker_port *rocker_port = netdev_priv(dev);
1758        int err;
1759
1760        err = rocker_port_dma_rings_init(rocker_port);
1761        if (err)
1762                return err;
1763
1764        err = request_irq(rocker_msix_tx_vector(rocker_port),
1765                          rocker_tx_irq_handler, 0,
1766                          rocker_driver_name, rocker_port);
1767        if (err) {
1768                netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1769                goto err_request_tx_irq;
1770        }
1771
1772        err = request_irq(rocker_msix_rx_vector(rocker_port),
1773                          rocker_rx_irq_handler, 0,
1774                          rocker_driver_name, rocker_port);
1775        if (err) {
1776                netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1777                goto err_request_rx_irq;
1778        }
1779
1780        err = rocker_world_port_open(rocker_port);
1781        if (err) {
1782                netdev_err(rocker_port->dev, "cannot open port in world\n");
1783                goto err_world_port_open;
1784        }
1785
1786        napi_enable(&rocker_port->napi_tx);
1787        napi_enable(&rocker_port->napi_rx);
1788        if (!dev->proto_down)
1789                rocker_port_set_enable(rocker_port, true);
1790        netif_start_queue(dev);
1791        return 0;
1792
1793err_world_port_open:
1794        free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1795err_request_rx_irq:
1796        free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1797err_request_tx_irq:
1798        rocker_port_dma_rings_fini(rocker_port);
1799        return err;
1800}
1801
1802static int rocker_port_stop(struct net_device *dev)
1803{
1804        struct rocker_port *rocker_port = netdev_priv(dev);
1805
1806        netif_stop_queue(dev);
1807        rocker_port_set_enable(rocker_port, false);
1808        napi_disable(&rocker_port->napi_rx);
1809        napi_disable(&rocker_port->napi_tx);
1810        rocker_world_port_stop(rocker_port);
1811        free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1812        free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1813        rocker_port_dma_rings_fini(rocker_port);
1814
1815        return 0;
1816}
1817
1818static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1819                                       const struct rocker_desc_info *desc_info)
1820{
1821        const struct rocker *rocker = rocker_port->rocker;
1822        struct pci_dev *pdev = rocker->pdev;
1823        const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1824        struct rocker_tlv *attr;
1825        int rem;
1826
1827        rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1828        if (!attrs[ROCKER_TLV_TX_FRAGS])
1829                return;
1830        rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1831                const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1832                dma_addr_t dma_handle;
1833                size_t len;
1834
1835                if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1836                        continue;
1837                rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1838                                        attr);
1839                if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1840                    !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1841                        continue;
1842                dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1843                len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1844                dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1845        }
1846}
1847
1848static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1849                                       struct rocker_desc_info *desc_info,
1850                                       char *buf, size_t buf_len)
1851{
1852        const struct rocker *rocker = rocker_port->rocker;
1853        struct pci_dev *pdev = rocker->pdev;
1854        dma_addr_t dma_handle;
1855        struct rocker_tlv *frag;
1856
1857        dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1858        if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1859                if (net_ratelimit())
1860                        netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1861                return -EIO;
1862        }
1863        frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1864        if (!frag)
1865                goto unmap_frag;
1866        if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1867                               dma_handle))
1868                goto nest_cancel;
1869        if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1870                               buf_len))
1871                goto nest_cancel;
1872        rocker_tlv_nest_end(desc_info, frag);
1873        return 0;
1874
1875nest_cancel:
1876        rocker_tlv_nest_cancel(desc_info, frag);
1877unmap_frag:
1878        dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1879        return -EMSGSIZE;
1880}
1881
1882static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1883{
1884        struct rocker_port *rocker_port = netdev_priv(dev);
1885        struct rocker *rocker = rocker_port->rocker;
1886        struct rocker_desc_info *desc_info;
1887        struct rocker_tlv *frags;
1888        int i;
1889        int err;
1890
1891        desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1892        if (unlikely(!desc_info)) {
1893                if (net_ratelimit())
1894                        netdev_err(dev, "tx ring full when queue awake\n");
1895                return NETDEV_TX_BUSY;
1896        }
1897
1898        rocker_desc_cookie_ptr_set(desc_info, skb);
1899
1900        frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1901        if (!frags)
1902                goto out;
1903        err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1904                                          skb->data, skb_headlen(skb));
1905        if (err)
1906                goto nest_cancel;
1907        if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1908                err = skb_linearize(skb);
1909                if (err)
1910                        goto unmap_frags;
1911        }
1912
1913        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1914                const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1915
1916                err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1917                                                  skb_frag_address(frag),
1918                                                  skb_frag_size(frag));
1919                if (err)
1920                        goto unmap_frags;
1921        }
1922        rocker_tlv_nest_end(desc_info, frags);
1923
1924        rocker_desc_gen_clear(desc_info);
1925        rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1926
1927        desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1928        if (!desc_info)
1929                netif_stop_queue(dev);
1930
1931        return NETDEV_TX_OK;
1932
1933unmap_frags:
1934        rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1935nest_cancel:
1936        rocker_tlv_nest_cancel(desc_info, frags);
1937out:
1938        dev_kfree_skb(skb);
1939        dev->stats.tx_dropped++;
1940
1941        return NETDEV_TX_OK;
1942}
1943
1944static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1945{
1946        struct sockaddr *addr = p;
1947        struct rocker_port *rocker_port = netdev_priv(dev);
1948        int err;
1949
1950        if (!is_valid_ether_addr(addr->sa_data))
1951                return -EADDRNOTAVAIL;
1952
1953        err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1954        if (err)
1955                return err;
1956        memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1957        return 0;
1958}
1959
1960static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1961{
1962        struct rocker_port *rocker_port = netdev_priv(dev);
1963        int running = netif_running(dev);
1964        int err;
1965
1966        if (running)
1967                rocker_port_stop(dev);
1968
1969        netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1970        dev->mtu = new_mtu;
1971
1972        err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1973        if (err)
1974                return err;
1975
1976        if (running)
1977                err = rocker_port_open(dev);
1978
1979        return err;
1980}
1981
1982static int rocker_port_get_phys_port_name(struct net_device *dev,
1983                                          char *buf, size_t len)
1984{
1985        struct rocker_port *rocker_port = netdev_priv(dev);
1986        struct port_name name = { .buf = buf, .len = len };
1987        int err;
1988
1989        err = rocker_cmd_exec(rocker_port, false,
1990                              rocker_cmd_get_port_settings_prep, NULL,
1991                              rocker_cmd_get_port_settings_phys_name_proc,
1992                              &name);
1993
1994        return err ? -EOPNOTSUPP : 0;
1995}
1996
1997static int rocker_port_change_proto_down(struct net_device *dev,
1998                                         bool proto_down)
1999{
2000        struct rocker_port *rocker_port = netdev_priv(dev);
2001
2002        if (rocker_port->dev->flags & IFF_UP)
2003                rocker_port_set_enable(rocker_port, !proto_down);
2004        rocker_port->dev->proto_down = proto_down;
2005        return 0;
2006}
2007
2008static void rocker_port_neigh_destroy(struct net_device *dev,
2009                                      struct neighbour *n)
2010{
2011        struct rocker_port *rocker_port = netdev_priv(n->dev);
2012        int err;
2013
2014        err = rocker_world_port_neigh_destroy(rocker_port, n);
2015        if (err)
2016                netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2017                            err);
2018}
2019
2020static int rocker_port_get_port_parent_id(struct net_device *dev,
2021                                          struct netdev_phys_item_id *ppid)
2022{
2023        const struct rocker_port *rocker_port = netdev_priv(dev);
2024        const struct rocker *rocker = rocker_port->rocker;
2025
2026        ppid->id_len = sizeof(rocker->hw.id);
2027        memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2028
2029        return 0;
2030}
2031
2032static const struct net_device_ops rocker_port_netdev_ops = {
2033        .ndo_open                       = rocker_port_open,
2034        .ndo_stop                       = rocker_port_stop,
2035        .ndo_start_xmit                 = rocker_port_xmit,
2036        .ndo_set_mac_address            = rocker_port_set_mac_address,
2037        .ndo_change_mtu                 = rocker_port_change_mtu,
2038        .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
2039        .ndo_change_proto_down          = rocker_port_change_proto_down,
2040        .ndo_neigh_destroy              = rocker_port_neigh_destroy,
2041        .ndo_get_port_parent_id         = rocker_port_get_port_parent_id,
2042};
2043
2044/********************
2045 * swdev interface
2046 ********************/
2047
2048static int rocker_port_attr_set(struct net_device *dev,
2049                                const struct switchdev_attr *attr)
2050{
2051        struct rocker_port *rocker_port = netdev_priv(dev);
2052        int err = 0;
2053
2054        switch (attr->id) {
2055        case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2056                err = rocker_world_port_attr_stp_state_set(rocker_port,
2057                                                           attr->u.stp_state);
2058                break;
2059        case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2060                err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2061                                                                  attr->u.brport_flags);
2062                break;
2063        case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2064                err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2065                                                              attr->u.brport_flags);
2066                break;
2067        case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2068                err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2069                                                                    attr->u.ageing_time);
2070                break;
2071        default:
2072                err = -EOPNOTSUPP;
2073                break;
2074        }
2075
2076        return err;
2077}
2078
2079static int rocker_port_obj_add(struct net_device *dev,
2080                               const struct switchdev_obj *obj)
2081{
2082        struct rocker_port *rocker_port = netdev_priv(dev);
2083        int err = 0;
2084
2085        switch (obj->id) {
2086        case SWITCHDEV_OBJ_ID_PORT_VLAN:
2087                err = rocker_world_port_obj_vlan_add(rocker_port,
2088                                                     SWITCHDEV_OBJ_PORT_VLAN(obj));
2089                break;
2090        default:
2091                err = -EOPNOTSUPP;
2092                break;
2093        }
2094
2095        return err;
2096}
2097
2098static int rocker_port_obj_del(struct net_device *dev,
2099                               const struct switchdev_obj *obj)
2100{
2101        struct rocker_port *rocker_port = netdev_priv(dev);
2102        int err = 0;
2103
2104        switch (obj->id) {
2105        case SWITCHDEV_OBJ_ID_PORT_VLAN:
2106                err = rocker_world_port_obj_vlan_del(rocker_port,
2107                                                     SWITCHDEV_OBJ_PORT_VLAN(obj));
2108                break;
2109        default:
2110                err = -EOPNOTSUPP;
2111                break;
2112        }
2113
2114        return err;
2115}
2116
2117struct rocker_fib_event_work {
2118        struct work_struct work;
2119        union {
2120                struct fib_entry_notifier_info fen_info;
2121                struct fib_rule_notifier_info fr_info;
2122        };
2123        struct rocker *rocker;
2124        unsigned long event;
2125};
2126
2127static void rocker_router_fib_event_work(struct work_struct *work)
2128{
2129        struct rocker_fib_event_work *fib_work =
2130                container_of(work, struct rocker_fib_event_work, work);
2131        struct rocker *rocker = fib_work->rocker;
2132        struct fib_rule *rule;
2133        int err;
2134
2135        /* Protect internal structures from changes */
2136        rtnl_lock();
2137        switch (fib_work->event) {
2138        case FIB_EVENT_ENTRY_REPLACE:
2139                err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2140                if (err)
2141                        rocker_world_fib4_abort(rocker);
2142                fib_info_put(fib_work->fen_info.fi);
2143                break;
2144        case FIB_EVENT_ENTRY_DEL:
2145                rocker_world_fib4_del(rocker, &fib_work->fen_info);
2146                fib_info_put(fib_work->fen_info.fi);
2147                break;
2148        case FIB_EVENT_RULE_ADD:
2149        case FIB_EVENT_RULE_DEL:
2150                rule = fib_work->fr_info.rule;
2151                if (!fib4_rule_default(rule))
2152                        rocker_world_fib4_abort(rocker);
2153                fib_rule_put(rule);
2154                break;
2155        }
2156        rtnl_unlock();
2157        kfree(fib_work);
2158}
2159
2160/* Called with rcu_read_lock() */
2161static int rocker_router_fib_event(struct notifier_block *nb,
2162                                   unsigned long event, void *ptr)
2163{
2164        struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2165        struct rocker_fib_event_work *fib_work;
2166        struct fib_notifier_info *info = ptr;
2167
2168        if (info->family != AF_INET)
2169                return NOTIFY_DONE;
2170
2171        fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2172        if (WARN_ON(!fib_work))
2173                return NOTIFY_BAD;
2174
2175        INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2176        fib_work->rocker = rocker;
2177        fib_work->event = event;
2178
2179        switch (event) {
2180        case FIB_EVENT_ENTRY_REPLACE:
2181        case FIB_EVENT_ENTRY_DEL:
2182                if (info->family == AF_INET) {
2183                        struct fib_entry_notifier_info *fen_info = ptr;
2184
2185                        if (fen_info->fi->fib_nh_is_v6) {
2186                                NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2187                                kfree(fib_work);
2188                                return notifier_from_errno(-EINVAL);
2189                        }
2190                        if (fen_info->fi->nh) {
2191                                NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2192                                kfree(fib_work);
2193                                return notifier_from_errno(-EINVAL);
2194                        }
2195                }
2196
2197                memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2198                /* Take referece on fib_info to prevent it from being
2199                 * freed while work is queued. Release it afterwards.
2200                 */
2201                fib_info_hold(fib_work->fen_info.fi);
2202                break;
2203        case FIB_EVENT_RULE_ADD:
2204        case FIB_EVENT_RULE_DEL:
2205                memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2206                fib_rule_get(fib_work->fr_info.rule);
2207                break;
2208        }
2209
2210        queue_work(rocker->rocker_owq, &fib_work->work);
2211
2212        return NOTIFY_DONE;
2213}
2214
2215/********************
2216 * ethtool interface
2217 ********************/
2218
2219static int
2220rocker_port_get_link_ksettings(struct net_device *dev,
2221                               struct ethtool_link_ksettings *ecmd)
2222{
2223        struct rocker_port *rocker_port = netdev_priv(dev);
2224
2225        return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2226}
2227
2228static int
2229rocker_port_set_link_ksettings(struct net_device *dev,
2230                               const struct ethtool_link_ksettings *ecmd)
2231{
2232        struct rocker_port *rocker_port = netdev_priv(dev);
2233
2234        return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2235}
2236
2237static void rocker_port_get_drvinfo(struct net_device *dev,
2238                                    struct ethtool_drvinfo *drvinfo)
2239{
2240        strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2241        strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2242}
2243
2244static struct rocker_port_stats {
2245        char str[ETH_GSTRING_LEN];
2246        int type;
2247} rocker_port_stats[] = {
2248        { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2249        { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2250        { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2251        { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2252
2253        { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2254        { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2255        { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2256        { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2257};
2258
2259#define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2260
2261static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2262                                    u8 *data)
2263{
2264        u8 *p = data;
2265        int i;
2266
2267        switch (stringset) {
2268        case ETH_SS_STATS:
2269                for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2270                        memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2271                        p += ETH_GSTRING_LEN;
2272                }
2273                break;
2274        }
2275}
2276
2277static int
2278rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2279                               struct rocker_desc_info *desc_info,
2280                               void *priv)
2281{
2282        struct rocker_tlv *cmd_stats;
2283
2284        if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2285                               ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2286                return -EMSGSIZE;
2287
2288        cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2289        if (!cmd_stats)
2290                return -EMSGSIZE;
2291
2292        if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2293                               rocker_port->pport))
2294                return -EMSGSIZE;
2295
2296        rocker_tlv_nest_end(desc_info, cmd_stats);
2297
2298        return 0;
2299}
2300
2301static int
2302rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2303                                       const struct rocker_desc_info *desc_info,
2304                                       void *priv)
2305{
2306        const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2307        const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2308        const struct rocker_tlv *pattr;
2309        u32 pport;
2310        u64 *data = priv;
2311        int i;
2312
2313        rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2314
2315        if (!attrs[ROCKER_TLV_CMD_INFO])
2316                return -EIO;
2317
2318        rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2319                                attrs[ROCKER_TLV_CMD_INFO]);
2320
2321        if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2322                return -EIO;
2323
2324        pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2325        if (pport != rocker_port->pport)
2326                return -EIO;
2327
2328        for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2329                pattr = stats_attrs[rocker_port_stats[i].type];
2330                if (!pattr)
2331                        continue;
2332
2333                data[i] = rocker_tlv_get_u64(pattr);
2334        }
2335
2336        return 0;
2337}
2338
2339static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2340                                             void *priv)
2341{
2342        return rocker_cmd_exec(rocker_port, false,
2343                               rocker_cmd_get_port_stats_prep, NULL,
2344                               rocker_cmd_get_port_stats_ethtool_proc,
2345                               priv);
2346}
2347
2348static void rocker_port_get_stats(struct net_device *dev,
2349                                  struct ethtool_stats *stats, u64 *data)
2350{
2351        struct rocker_port *rocker_port = netdev_priv(dev);
2352
2353        if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2354                int i;
2355
2356                for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2357                        data[i] = 0;
2358        }
2359}
2360
2361static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2362{
2363        switch (sset) {
2364        case ETH_SS_STATS:
2365                return ROCKER_PORT_STATS_LEN;
2366        default:
2367                return -EOPNOTSUPP;
2368        }
2369}
2370
2371static const struct ethtool_ops rocker_port_ethtool_ops = {
2372        .get_drvinfo            = rocker_port_get_drvinfo,
2373        .get_link               = ethtool_op_get_link,
2374        .get_strings            = rocker_port_get_strings,
2375        .get_ethtool_stats      = rocker_port_get_stats,
2376        .get_sset_count         = rocker_port_get_sset_count,
2377        .get_link_ksettings     = rocker_port_get_link_ksettings,
2378        .set_link_ksettings     = rocker_port_set_link_ksettings,
2379};
2380
2381/*****************
2382 * NAPI interface
2383 *****************/
2384
2385static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2386{
2387        return container_of(napi, struct rocker_port, napi_tx);
2388}
2389
2390static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2391{
2392        struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2393        const struct rocker *rocker = rocker_port->rocker;
2394        const struct rocker_desc_info *desc_info;
2395        u32 credits = 0;
2396        int err;
2397
2398        /* Cleanup tx descriptors */
2399        while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2400                struct sk_buff *skb;
2401
2402                err = rocker_desc_err(desc_info);
2403                if (err && net_ratelimit())
2404                        netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2405                                   err);
2406                rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2407
2408                skb = rocker_desc_cookie_ptr_get(desc_info);
2409                if (err == 0) {
2410                        rocker_port->dev->stats.tx_packets++;
2411                        rocker_port->dev->stats.tx_bytes += skb->len;
2412                } else {
2413                        rocker_port->dev->stats.tx_errors++;
2414                }
2415
2416                dev_kfree_skb_any(skb);
2417                credits++;
2418        }
2419
2420        if (credits && netif_queue_stopped(rocker_port->dev))
2421                netif_wake_queue(rocker_port->dev);
2422
2423        napi_complete(napi);
2424        rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2425
2426        return 0;
2427}
2428
2429static int rocker_port_rx_proc(const struct rocker *rocker,
2430                               const struct rocker_port *rocker_port,
2431                               struct rocker_desc_info *desc_info)
2432{
2433        const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2434        struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2435        size_t rx_len;
2436        u16 rx_flags = 0;
2437
2438        if (!skb)
2439                return -ENOENT;
2440
2441        rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2442        if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2443                return -EINVAL;
2444        if (attrs[ROCKER_TLV_RX_FLAGS])
2445                rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2446
2447        rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2448
2449        rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2450        skb_put(skb, rx_len);
2451        skb->protocol = eth_type_trans(skb, rocker_port->dev);
2452
2453        if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2454                skb->offload_fwd_mark = 1;
2455
2456        rocker_port->dev->stats.rx_packets++;
2457        rocker_port->dev->stats.rx_bytes += skb->len;
2458
2459        netif_receive_skb(skb);
2460
2461        return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2462}
2463
2464static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2465{
2466        return container_of(napi, struct rocker_port, napi_rx);
2467}
2468
2469static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2470{
2471        struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2472        const struct rocker *rocker = rocker_port->rocker;
2473        struct rocker_desc_info *desc_info;
2474        u32 credits = 0;
2475        int err;
2476
2477        /* Process rx descriptors */
2478        while (credits < budget &&
2479               (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2480                err = rocker_desc_err(desc_info);
2481                if (err) {
2482                        if (net_ratelimit())
2483                                netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2484                                           err);
2485                } else {
2486                        err = rocker_port_rx_proc(rocker, rocker_port,
2487                                                  desc_info);
2488                        if (err && net_ratelimit())
2489                                netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2490                                           err);
2491                }
2492                if (err)
2493                        rocker_port->dev->stats.rx_errors++;
2494
2495                rocker_desc_gen_clear(desc_info);
2496                rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2497                credits++;
2498        }
2499
2500        if (credits < budget)
2501                napi_complete_done(napi, credits);
2502
2503        rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2504
2505        return credits;
2506}
2507
2508/*****************
2509 * PCI driver ops
2510 *****************/
2511
2512static void rocker_carrier_init(const struct rocker_port *rocker_port)
2513{
2514        const struct rocker *rocker = rocker_port->rocker;
2515        u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2516        bool link_up;
2517
2518        link_up = link_status & (1 << rocker_port->pport);
2519        if (link_up)
2520                netif_carrier_on(rocker_port->dev);
2521        else
2522                netif_carrier_off(rocker_port->dev);
2523}
2524
2525static void rocker_remove_ports(struct rocker *rocker)
2526{
2527        struct rocker_port *rocker_port;
2528        int i;
2529
2530        for (i = 0; i < rocker->port_count; i++) {
2531                rocker_port = rocker->ports[i];
2532                if (!rocker_port)
2533                        continue;
2534                rocker_world_port_fini(rocker_port);
2535                unregister_netdev(rocker_port->dev);
2536                rocker_world_port_post_fini(rocker_port);
2537                free_netdev(rocker_port->dev);
2538        }
2539        rocker_world_fini(rocker);
2540        kfree(rocker->ports);
2541}
2542
2543static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2544{
2545        const struct rocker *rocker = rocker_port->rocker;
2546        const struct pci_dev *pdev = rocker->pdev;
2547        int err;
2548
2549        err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2550                                                   rocker_port->dev->dev_addr);
2551        if (err) {
2552                dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2553                eth_hw_addr_random(rocker_port->dev);
2554        }
2555}
2556
2557#define ROCKER_PORT_MIN_MTU     ETH_MIN_MTU
2558#define ROCKER_PORT_MAX_MTU     9000
2559static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2560{
2561        struct pci_dev *pdev = rocker->pdev;
2562        struct rocker_port *rocker_port;
2563        struct net_device *dev;
2564        int err;
2565
2566        dev = alloc_etherdev(sizeof(struct rocker_port));
2567        if (!dev)
2568                return -ENOMEM;
2569        SET_NETDEV_DEV(dev, &pdev->dev);
2570        rocker_port = netdev_priv(dev);
2571        rocker_port->dev = dev;
2572        rocker_port->rocker = rocker;
2573        rocker_port->port_number = port_number;
2574        rocker_port->pport = port_number + 1;
2575
2576        err = rocker_world_check_init(rocker_port);
2577        if (err) {
2578                dev_err(&pdev->dev, "world init failed\n");
2579                goto err_world_check_init;
2580        }
2581
2582        rocker_port_dev_addr_init(rocker_port);
2583        dev->netdev_ops = &rocker_port_netdev_ops;
2584        dev->ethtool_ops = &rocker_port_ethtool_ops;
2585        netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2586                          NAPI_POLL_WEIGHT);
2587        netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2588                       NAPI_POLL_WEIGHT);
2589        rocker_carrier_init(rocker_port);
2590
2591        dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2592
2593        /* MTU range: 68 - 9000 */
2594        dev->min_mtu = ROCKER_PORT_MIN_MTU;
2595        dev->max_mtu = ROCKER_PORT_MAX_MTU;
2596
2597        err = rocker_world_port_pre_init(rocker_port);
2598        if (err) {
2599                dev_err(&pdev->dev, "port world pre-init failed\n");
2600                goto err_world_port_pre_init;
2601        }
2602        err = register_netdev(dev);
2603        if (err) {
2604                dev_err(&pdev->dev, "register_netdev failed\n");
2605                goto err_register_netdev;
2606        }
2607        rocker->ports[port_number] = rocker_port;
2608
2609        err = rocker_world_port_init(rocker_port);
2610        if (err) {
2611                dev_err(&pdev->dev, "port world init failed\n");
2612                goto err_world_port_init;
2613        }
2614
2615        return 0;
2616
2617err_world_port_init:
2618        rocker->ports[port_number] = NULL;
2619        unregister_netdev(dev);
2620err_register_netdev:
2621        rocker_world_port_post_fini(rocker_port);
2622err_world_port_pre_init:
2623err_world_check_init:
2624        free_netdev(dev);
2625        return err;
2626}
2627
2628static int rocker_probe_ports(struct rocker *rocker)
2629{
2630        int i;
2631        size_t alloc_size;
2632        int err;
2633
2634        alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2635        rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2636        if (!rocker->ports)
2637                return -ENOMEM;
2638        for (i = 0; i < rocker->port_count; i++) {
2639                err = rocker_probe_port(rocker, i);
2640                if (err)
2641                        goto remove_ports;
2642        }
2643        return 0;
2644
2645remove_ports:
2646        rocker_remove_ports(rocker);
2647        return err;
2648}
2649
2650static int rocker_msix_init(struct rocker *rocker)
2651{
2652        struct pci_dev *pdev = rocker->pdev;
2653        int msix_entries;
2654        int i;
2655        int err;
2656
2657        msix_entries = pci_msix_vec_count(pdev);
2658        if (msix_entries < 0)
2659                return msix_entries;
2660
2661        if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2662                return -EINVAL;
2663
2664        rocker->msix_entries = kmalloc_array(msix_entries,
2665                                             sizeof(struct msix_entry),
2666                                             GFP_KERNEL);
2667        if (!rocker->msix_entries)
2668                return -ENOMEM;
2669
2670        for (i = 0; i < msix_entries; i++)
2671                rocker->msix_entries[i].entry = i;
2672
2673        err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2674        if (err < 0)
2675                goto err_enable_msix;
2676
2677        return 0;
2678
2679err_enable_msix:
2680        kfree(rocker->msix_entries);
2681        return err;
2682}
2683
2684static void rocker_msix_fini(const struct rocker *rocker)
2685{
2686        pci_disable_msix(rocker->pdev);
2687        kfree(rocker->msix_entries);
2688}
2689
2690static bool rocker_port_dev_check(const struct net_device *dev)
2691{
2692        return dev->netdev_ops == &rocker_port_netdev_ops;
2693}
2694
2695static int
2696rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2697                struct switchdev_notifier_port_attr_info *port_attr_info)
2698{
2699        int err;
2700
2701        err = rocker_port_attr_set(netdev, port_attr_info->attr);
2702
2703        port_attr_info->handled = true;
2704        return notifier_from_errno(err);
2705}
2706
2707struct rocker_switchdev_event_work {
2708        struct work_struct work;
2709        struct switchdev_notifier_fdb_info fdb_info;
2710        struct rocker_port *rocker_port;
2711        unsigned long event;
2712};
2713
2714static void
2715rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2716                          struct switchdev_notifier_fdb_info *recv_info)
2717{
2718        struct switchdev_notifier_fdb_info info = {};
2719
2720        info.addr = recv_info->addr;
2721        info.vid = recv_info->vid;
2722        info.offloaded = true;
2723        call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2724                                 rocker_port->dev, &info.info, NULL);
2725}
2726
2727static void rocker_switchdev_event_work(struct work_struct *work)
2728{
2729        struct rocker_switchdev_event_work *switchdev_work =
2730                container_of(work, struct rocker_switchdev_event_work, work);
2731        struct rocker_port *rocker_port = switchdev_work->rocker_port;
2732        struct switchdev_notifier_fdb_info *fdb_info;
2733        int err;
2734
2735        rtnl_lock();
2736        switch (switchdev_work->event) {
2737        case SWITCHDEV_FDB_ADD_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_add(rocker_port, fdb_info);
2742                if (err) {
2743                        netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744                        break;
2745                }
2746                rocker_fdb_offload_notify(rocker_port, fdb_info);
2747                break;
2748        case SWITCHDEV_FDB_DEL_TO_DEVICE:
2749                fdb_info = &switchdev_work->fdb_info;
2750                if (!fdb_info->added_by_user || fdb_info->is_local)
2751                        break;
2752                err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2753                if (err)
2754                        netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2755                break;
2756        }
2757        rtnl_unlock();
2758
2759        kfree(switchdev_work->fdb_info.addr);
2760        kfree(switchdev_work);
2761        dev_put(rocker_port->dev);
2762}
2763
2764/* called under rcu_read_lock() */
2765static int rocker_switchdev_event(struct notifier_block *unused,
2766                                  unsigned long event, void *ptr)
2767{
2768        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2769        struct rocker_switchdev_event_work *switchdev_work;
2770        struct switchdev_notifier_fdb_info *fdb_info = ptr;
2771        struct rocker_port *rocker_port;
2772
2773        if (!rocker_port_dev_check(dev))
2774                return NOTIFY_DONE;
2775
2776        if (event == SWITCHDEV_PORT_ATTR_SET)
2777                return rocker_switchdev_port_attr_set_event(dev, ptr);
2778
2779        rocker_port = netdev_priv(dev);
2780        switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2781        if (WARN_ON(!switchdev_work))
2782                return NOTIFY_BAD;
2783
2784        INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2785        switchdev_work->rocker_port = rocker_port;
2786        switchdev_work->event = event;
2787
2788        switch (event) {
2789        case SWITCHDEV_FDB_ADD_TO_DEVICE:
2790        case SWITCHDEV_FDB_DEL_TO_DEVICE:
2791                memcpy(&switchdev_work->fdb_info, ptr,
2792                       sizeof(switchdev_work->fdb_info));
2793                switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2794                if (unlikely(!switchdev_work->fdb_info.addr)) {
2795                        kfree(switchdev_work);
2796                        return NOTIFY_BAD;
2797                }
2798
2799                ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2800                                fdb_info->addr);
2801                /* Take a reference on the rocker device */
2802                dev_hold(dev);
2803                break;
2804        default:
2805                kfree(switchdev_work);
2806                return NOTIFY_DONE;
2807        }
2808
2809        queue_work(rocker_port->rocker->rocker_owq,
2810                   &switchdev_work->work);
2811        return NOTIFY_DONE;
2812}
2813
2814static int
2815rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2816                        struct switchdev_notifier_port_obj_info *port_obj_info)
2817{
2818        int err = -EOPNOTSUPP;
2819
2820        switch (event) {
2821        case SWITCHDEV_PORT_OBJ_ADD:
2822                err = rocker_port_obj_add(netdev, port_obj_info->obj);
2823                break;
2824        case SWITCHDEV_PORT_OBJ_DEL:
2825                err = rocker_port_obj_del(netdev, port_obj_info->obj);
2826                break;
2827        }
2828
2829        port_obj_info->handled = true;
2830        return notifier_from_errno(err);
2831}
2832
2833static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2834                                           unsigned long event, void *ptr)
2835{
2836        struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2837
2838        if (!rocker_port_dev_check(dev))
2839                return NOTIFY_DONE;
2840
2841        switch (event) {
2842        case SWITCHDEV_PORT_OBJ_ADD:
2843        case SWITCHDEV_PORT_OBJ_DEL:
2844                return rocker_switchdev_port_obj_event(event, dev, ptr);
2845        case SWITCHDEV_PORT_ATTR_SET:
2846                return rocker_switchdev_port_attr_set_event(dev, ptr);
2847        }
2848
2849        return NOTIFY_DONE;
2850}
2851
2852static struct notifier_block rocker_switchdev_notifier = {
2853        .notifier_call = rocker_switchdev_event,
2854};
2855
2856static struct notifier_block rocker_switchdev_blocking_notifier = {
2857        .notifier_call = rocker_switchdev_blocking_event,
2858};
2859
2860static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2861{
2862        struct notifier_block *nb;
2863        struct rocker *rocker;
2864        int err;
2865
2866        rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2867        if (!rocker)
2868                return -ENOMEM;
2869
2870        err = pci_enable_device(pdev);
2871        if (err) {
2872                dev_err(&pdev->dev, "pci_enable_device failed\n");
2873                goto err_pci_enable_device;
2874        }
2875
2876        err = pci_request_regions(pdev, rocker_driver_name);
2877        if (err) {
2878                dev_err(&pdev->dev, "pci_request_regions failed\n");
2879                goto err_pci_request_regions;
2880        }
2881
2882        err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2883        if (!err) {
2884                err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2885                if (err) {
2886                        dev_err(&pdev->dev, "dma_set_coherent_mask failed\n");
2887                        goto err_pci_set_dma_mask;
2888                }
2889        } else {
2890                err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2891                if (err) {
2892                        dev_err(&pdev->dev, "dma_set_mask failed\n");
2893                        goto err_pci_set_dma_mask;
2894                }
2895        }
2896
2897        if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2898                dev_err(&pdev->dev, "invalid PCI region size\n");
2899                err = -EINVAL;
2900                goto err_pci_resource_len_check;
2901        }
2902
2903        rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2904                                  pci_resource_len(pdev, 0));
2905        if (!rocker->hw_addr) {
2906                dev_err(&pdev->dev, "ioremap failed\n");
2907                err = -EIO;
2908                goto err_ioremap;
2909        }
2910        pci_set_master(pdev);
2911
2912        rocker->pdev = pdev;
2913        pci_set_drvdata(pdev, rocker);
2914
2915        rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2916
2917        err = rocker_msix_init(rocker);
2918        if (err) {
2919                dev_err(&pdev->dev, "MSI-X init failed\n");
2920                goto err_msix_init;
2921        }
2922
2923        err = rocker_basic_hw_test(rocker);
2924        if (err) {
2925                dev_err(&pdev->dev, "basic hw test failed\n");
2926                goto err_basic_hw_test;
2927        }
2928
2929        rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2930
2931        err = rocker_dma_rings_init(rocker);
2932        if (err)
2933                goto err_dma_rings_init;
2934
2935        err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2936                          rocker_cmd_irq_handler, 0,
2937                          rocker_driver_name, rocker);
2938        if (err) {
2939                dev_err(&pdev->dev, "cannot assign cmd irq\n");
2940                goto err_request_cmd_irq;
2941        }
2942
2943        err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2944                          rocker_event_irq_handler, 0,
2945                          rocker_driver_name, rocker);
2946        if (err) {
2947                dev_err(&pdev->dev, "cannot assign event irq\n");
2948                goto err_request_event_irq;
2949        }
2950
2951        rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2952                                                     WQ_MEM_RECLAIM);
2953        if (!rocker->rocker_owq) {
2954                err = -ENOMEM;
2955                goto err_alloc_ordered_workqueue;
2956        }
2957
2958        err = rocker_probe_ports(rocker);
2959        if (err) {
2960                dev_err(&pdev->dev, "failed to probe ports\n");
2961                goto err_probe_ports;
2962        }
2963
2964        /* Only FIBs pointing to our own netdevs are programmed into
2965         * the device, so no need to pass a callback.
2966         */
2967        rocker->fib_nb.notifier_call = rocker_router_fib_event;
2968        err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2969        if (err)
2970                goto err_register_fib_notifier;
2971
2972        err = register_switchdev_notifier(&rocker_switchdev_notifier);
2973        if (err) {
2974                dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2975                goto err_register_switchdev_notifier;
2976        }
2977
2978        nb = &rocker_switchdev_blocking_notifier;
2979        err = register_switchdev_blocking_notifier(nb);
2980        if (err) {
2981                dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2982                goto err_register_switchdev_blocking_notifier;
2983        }
2984
2985        rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2986
2987        dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2988                 (int)sizeof(rocker->hw.id), &rocker->hw.id);
2989
2990        return 0;
2991
2992err_register_switchdev_blocking_notifier:
2993        unregister_switchdev_notifier(&rocker_switchdev_notifier);
2994err_register_switchdev_notifier:
2995        unregister_fib_notifier(&init_net, &rocker->fib_nb);
2996err_register_fib_notifier:
2997        rocker_remove_ports(rocker);
2998err_probe_ports:
2999        destroy_workqueue(rocker->rocker_owq);
3000err_alloc_ordered_workqueue:
3001        free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3002err_request_event_irq:
3003        free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3004err_request_cmd_irq:
3005        rocker_dma_rings_fini(rocker);
3006err_dma_rings_init:
3007err_basic_hw_test:
3008        rocker_msix_fini(rocker);
3009err_msix_init:
3010        iounmap(rocker->hw_addr);
3011err_ioremap:
3012err_pci_resource_len_check:
3013err_pci_set_dma_mask:
3014        pci_release_regions(pdev);
3015err_pci_request_regions:
3016        pci_disable_device(pdev);
3017err_pci_enable_device:
3018        kfree(rocker);
3019        return err;
3020}
3021
3022static void rocker_remove(struct pci_dev *pdev)
3023{
3024        struct rocker *rocker = pci_get_drvdata(pdev);
3025        struct notifier_block *nb;
3026
3027        nb = &rocker_switchdev_blocking_notifier;
3028        unregister_switchdev_blocking_notifier(nb);
3029
3030        unregister_switchdev_notifier(&rocker_switchdev_notifier);
3031        unregister_fib_notifier(&init_net, &rocker->fib_nb);
3032        rocker_remove_ports(rocker);
3033        rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3034        destroy_workqueue(rocker->rocker_owq);
3035        free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3036        free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3037        rocker_dma_rings_fini(rocker);
3038        rocker_msix_fini(rocker);
3039        iounmap(rocker->hw_addr);
3040        pci_release_regions(rocker->pdev);
3041        pci_disable_device(rocker->pdev);
3042        kfree(rocker);
3043}
3044
3045static struct pci_driver rocker_pci_driver = {
3046        .name           = rocker_driver_name,
3047        .id_table       = rocker_pci_id_table,
3048        .probe          = rocker_probe,
3049        .remove         = rocker_remove,
3050};
3051
3052/************************************
3053 * Net device notifier event handler
3054 ************************************/
3055
3056static bool rocker_port_dev_check_under(const struct net_device *dev,
3057                                        struct rocker *rocker)
3058{
3059        struct rocker_port *rocker_port;
3060
3061        if (!rocker_port_dev_check(dev))
3062                return false;
3063
3064        rocker_port = netdev_priv(dev);
3065        if (rocker_port->rocker != rocker)
3066                return false;
3067
3068        return true;
3069}
3070
3071struct rocker_walk_data {
3072        struct rocker *rocker;
3073        struct rocker_port *port;
3074};
3075
3076static int rocker_lower_dev_walk(struct net_device *lower_dev,
3077                                 struct netdev_nested_priv *priv)
3078{
3079        struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3080        int ret = 0;
3081
3082        if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3083                data->port = netdev_priv(lower_dev);
3084                ret = 1;
3085        }
3086
3087        return ret;
3088}
3089
3090struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3091                                               struct rocker *rocker)
3092{
3093        struct netdev_nested_priv priv;
3094        struct rocker_walk_data data;
3095
3096        if (rocker_port_dev_check_under(dev, rocker))
3097                return netdev_priv(dev);
3098
3099        data.rocker = rocker;
3100        data.port = NULL;
3101        priv.data = (void *)&data;
3102        netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3103
3104        return data.port;
3105}
3106
3107static int rocker_netdevice_event(struct notifier_block *unused,
3108                                  unsigned long event, void *ptr)
3109{
3110        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3111        struct netdev_notifier_changeupper_info *info;
3112        struct rocker_port *rocker_port;
3113        int err;
3114
3115        if (!rocker_port_dev_check(dev))
3116                return NOTIFY_DONE;
3117
3118        switch (event) {
3119        case NETDEV_CHANGEUPPER:
3120                info = ptr;
3121                if (!info->master)
3122                        goto out;
3123                rocker_port = netdev_priv(dev);
3124                if (info->linking) {
3125                        err = rocker_world_port_master_linked(rocker_port,
3126                                                              info->upper_dev);
3127                        if (err)
3128                                netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3129                                            err);
3130                } else {
3131                        err = rocker_world_port_master_unlinked(rocker_port,
3132                                                                info->upper_dev);
3133                        if (err)
3134                                netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3135                                            err);
3136                }
3137        }
3138out:
3139        return NOTIFY_DONE;
3140}
3141
3142static struct notifier_block rocker_netdevice_nb __read_mostly = {
3143        .notifier_call = rocker_netdevice_event,
3144};
3145
3146/************************************
3147 * Net event notifier event handler
3148 ************************************/
3149
3150static int rocker_netevent_event(struct notifier_block *unused,
3151                                 unsigned long event, void *ptr)
3152{
3153        struct rocker_port *rocker_port;
3154        struct net_device *dev;
3155        struct neighbour *n = ptr;
3156        int err;
3157
3158        switch (event) {
3159        case NETEVENT_NEIGH_UPDATE:
3160                if (n->tbl != &arp_tbl)
3161                        return NOTIFY_DONE;
3162                dev = n->dev;
3163                if (!rocker_port_dev_check(dev))
3164                        return NOTIFY_DONE;
3165                rocker_port = netdev_priv(dev);
3166                err = rocker_world_port_neigh_update(rocker_port, n);
3167                if (err)
3168                        netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3169                                    err);
3170                break;
3171        }
3172
3173        return NOTIFY_DONE;
3174}
3175
3176static struct notifier_block rocker_netevent_nb __read_mostly = {
3177        .notifier_call = rocker_netevent_event,
3178};
3179
3180/***********************
3181 * Module init and exit
3182 ***********************/
3183
3184static int __init rocker_module_init(void)
3185{
3186        int err;
3187
3188        register_netdevice_notifier(&rocker_netdevice_nb);
3189        register_netevent_notifier(&rocker_netevent_nb);
3190        err = pci_register_driver(&rocker_pci_driver);
3191        if (err)
3192                goto err_pci_register_driver;
3193        return 0;
3194
3195err_pci_register_driver:
3196        unregister_netevent_notifier(&rocker_netevent_nb);
3197        unregister_netdevice_notifier(&rocker_netdevice_nb);
3198        return err;
3199}
3200
3201static void __exit rocker_module_exit(void)
3202{
3203        unregister_netevent_notifier(&rocker_netevent_nb);
3204        unregister_netdevice_notifier(&rocker_netdevice_nb);
3205        pci_unregister_driver(&rocker_pci_driver);
3206}
3207
3208module_init(rocker_module_init);
3209module_exit(rocker_module_exit);
3210
3211MODULE_LICENSE("GPL v2");
3212MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3213MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3214MODULE_DESCRIPTION("Rocker switch device driver");
3215MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);
3216