drivers/net/ethernet/rocker/rocker_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
   4  * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
   5  * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/sched.h>
  13 #include <linux/wait.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/sort.h>
  16 #include <linux/random.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/socket.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/if_ether.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/if_bridge.h>
  25 #include <linux/bitops.h>
  26 #include <linux/ctype.h>
  27 #include <linux/workqueue.h>
  28 #include <net/switchdev.h>
  29 #include <net/rtnetlink.h>
  30 #include <net/netevent.h>
  31 #include <net/arp.h>
  32 #include <net/fib_rules.h>
  33 #include <net/fib_notifier.h>
  34 #include <linux/io-64-nonatomic-lo-hi.h>
  35 #include <generated/utsrelease.h>
  36
  37 #include "rocker_hw.h"
  38 #include "rocker.h"
  39 #include "rocker_tlv.h"
  40
  41 static const char rocker_driver_name[] = "rocker";
  42
  43 static const struct pci_device_id rocker_pci_id_table[] = {
  44         {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
  45         {0, }
  46 };
  47
  48 struct rocker_wait {
  49         wait_queue_head_t wait;
  50         bool done;
  51         bool nowait;
  52 };
  53
  54 static void rocker_wait_reset(struct rocker_wait *wait)
  55 {
  56         wait->done = false;
  57         wait->nowait = false;
  58 }
  59
  60 static void rocker_wait_init(struct rocker_wait *wait)
  61 {
  62         init_waitqueue_head(&wait->wait);
  63         rocker_wait_reset(wait);
  64 }
  65
  66 static struct rocker_wait *rocker_wait_create(void)
  67 {
  68         struct rocker_wait *wait;
  69
  70         wait = kzalloc(sizeof(*wait), GFP_KERNEL);
  71         if (!wait)
  72                 return NULL;
  73         return wait;
  74 }
  75
  76 static void rocker_wait_destroy(struct rocker_wait *wait)
  77 {
  78         kfree(wait);
  79 }
  80
  81 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
  82                                       unsigned long timeout)
  83 {
  84         wait_event_timeout(wait->wait, wait->done, HZ / 10);
  85         if (!wait->done)
  86                 return false;
  87         return true;
  88 }
  89
  90 static void rocker_wait_wake_up(struct rocker_wait *wait)
  91 {
  92         wait->done = true;
  93         wake_up(&wait->wait);
  94 }
  95
  96 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
  97 {
  98         return rocker->msix_entries[vector].vector;
  99 }
 100
 101 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
 102 {
 103         return rocker_msix_vector(rocker_port->rocker,
 104                                   ROCKER_MSIX_VEC_TX(rocker_port->port_number));
 105 }
 106
 107 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
 108 {
 109         return rocker_msix_vector(rocker_port->rocker,
 110                                   ROCKER_MSIX_VEC_RX(rocker_port->port_number));
 111 }
 112
 113 #define rocker_write32(rocker, reg, val)        \
 114         writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 115 #define rocker_read32(rocker, reg)      \
 116         readl((rocker)->hw_addr + (ROCKER_ ## reg))
 117 #define rocker_write64(rocker, reg, val)        \
 118         writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 119 #define rocker_read64(rocker, reg)      \
 120         readq((rocker)->hw_addr + (ROCKER_ ## reg))
 121
 122 /*****************************
 123  * HW basic testing functions
 124  *****************************/
 125
 126 static int rocker_reg_test(const struct rocker *rocker)
 127 {
 128         const struct pci_dev *pdev = rocker->pdev;
 129         u64 test_reg;
 130         u64 rnd;
 131
 132         rnd = 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
 156 static int rocker_dma_test_one(const struct rocker *rocker,
 157                                struct rocker_wait *wait, u32 test_type,
 158                                dma_addr_t dma_handle, const unsigned char *buf,
 159                                const unsigned char *expect, size_t size)
 160 {
 161         const struct pci_dev *pdev = rocker->pdev;
 162         int i;
 163
 164         rocker_wait_reset(wait);
 165         rocker_write32(rocker, TEST_DMA_CTRL, test_type);
 166
 167         if (!rocker_wait_event_timeout(wait, HZ / 10)) {
 168                 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
 169                 return -EIO;
 170         }
 171
 172         for (i = 0; i < size; i++) {
 173                 if (buf[i] != expect[i]) {
 174                         dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
 175                                 buf[i], i, expect[i]);
 176                         return -EIO;
 177                 }
 178         }
 179         return 0;
 180 }
 181
 182 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
 183 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
 184
 185 static int rocker_dma_test_offset(const struct rocker *rocker,
 186                                   struct rocker_wait *wait, int offset)
 187 {
 188         struct pci_dev *pdev = rocker->pdev;
 189         unsigned char *alloc;
 190         unsigned char *buf;
 191         unsigned char *expect;
 192         dma_addr_t dma_handle;
 193         int i;
 194         int err;
 195
 196         alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
 197                         GFP_KERNEL | GFP_DMA);
 198         if (!alloc)
 199                 return -ENOMEM;
 200         buf = alloc + offset;
 201         expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
 202
 203         dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
 204                                     DMA_BIDIRECTIONAL);
 205         if (dma_mapping_error(&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
 236 unmap:
 237         dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
 238                          DMA_BIDIRECTIONAL);
 239 free_alloc:
 240         kfree(alloc);
 241
 242         return err;
 243 }
 244
 245 static int rocker_dma_test(const struct rocker *rocker,
 246                            struct rocker_wait *wait)
 247 {
 248         int i;
 249         int err;
 250
 251         for (i = 0; i < 8; i++) {
 252                 err = rocker_dma_test_offset(rocker, wait, i);
 253                 if (err)
 254                         return err;
 255         }
 256         return 0;
 257 }
 258
 259 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
 260 {
 261         struct rocker_wait *wait = dev_id;
 262
 263         rocker_wait_wake_up(wait);
 264
 265         return IRQ_HANDLED;
 266 }
 267
 268 static int rocker_basic_hw_test(const struct rocker *rocker)
 269 {
 270         const struct pci_dev *pdev = rocker->pdev;
 271         struct rocker_wait wait;
 272         int err;
 273
 274         err = rocker_reg_test(rocker);
 275         if (err) {
 276                 dev_err(&pdev->dev, "reg test failed\n");
 277                 return err;
 278         }
 279
 280         err = request_irq(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
 301 free_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
 310 static u32 __pos_inc(u32 pos, size_t limit)
 311 {
 312         return ++pos == limit ? 0 : pos;
 313 }
 314
 315 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
 316 {
 317         int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 318
 319         switch (err) {
 320         case ROCKER_OK:
 321                 return 0;
 322         case -ROCKER_ENOENT:
 323                 return -ENOENT;
 324         case -ROCKER_ENXIO:
 325                 return -ENXIO;
 326         case -ROCKER_ENOMEM:
 327                 return -ENOMEM;
 328         case -ROCKER_EEXIST:
 329                 return -EEXIST;
 330         case -ROCKER_EINVAL:
 331                 return -EINVAL;
 332         case -ROCKER_EMSGSIZE:
 333                 return -EMSGSIZE;
 334         case -ROCKER_ENOTSUP:
 335                 return -EOPNOTSUPP;
 336         case -ROCKER_ENOBUFS:
 337                 return -ENOBUFS;
 338         }
 339
 340         return -EINVAL;
 341 }
 342
 343 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
 344 {
 345         desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 346 }
 347
 348 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
 349 {
 350         u32 comp_err = desc_info->desc->comp_err;
 351
 352         return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
 353 }
 354
 355 static void *
 356 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
 357 {
 358         return (void *)(uintptr_t)desc_info->desc->cookie;
 359 }
 360
 361 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
 362                                        void *ptr)
 363 {
 364         desc_info->desc->cookie = (uintptr_t) ptr;
 365 }
 366
 367 static struct rocker_desc_info *
 368 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
 369 {
 370         struct rocker_desc_info *desc_info;
 371         u32 head = __pos_inc(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
 380 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
 381 {
 382         desc_info->desc->buf_size = desc_info->data_size;
 383         desc_info->desc->tlv_size = desc_info->tlv_size;
 384 }
 385
 386 static void rocker_desc_head_set(const struct rocker *rocker,
 387                                  struct rocker_dma_ring_info *info,
 388                                  const struct rocker_desc_info *desc_info)
 389 {
 390         u32 head = __pos_inc(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
 398 static struct rocker_desc_info *
 399 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
 400 {
 401         struct rocker_desc_info *desc_info;
 402
 403         if (info->tail == info->head)
 404                 return NULL; /* nothing to be done between head and tail */
 405         desc_info = &info->desc_info[info->tail];
 406         if (!rocker_desc_gen(desc_info))
 407                 return NULL; /* gen bit not set, desc is not ready yet */
 408         info->tail = __pos_inc(info->tail, info->size);
 409         desc_info->tlv_size = desc_info->desc->tlv_size;
 410         return desc_info;
 411 }
 412
 413 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
 414                                         const struct rocker_dma_ring_info *info,
 415                                         u32 credits)
 416 {
 417         if (credits)
 418                 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
 419 }
 420
 421 static unsigned long rocker_dma_ring_size_fix(size_t size)
 422 {
 423         return max(ROCKER_DMA_SIZE_MIN,
 424                    min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
 425 }
 426
 427 static int rocker_dma_ring_create(const struct rocker *rocker,
 428                                   unsigned int type,
 429                                   size_t size,
 430                                   struct rocker_dma_ring_info *info)
 431 {
 432         int i;
 433
 434         BUG_ON(size != rocker_dma_ring_size_fix(size));
 435         info->size = size;
 436         info->type = type;
 437         info->head = 0;
 438         info->tail = 0;
 439         info->desc_info = kcalloc(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
 463 static void rocker_dma_ring_destroy(const struct rocker *rocker,
 464                                     const struct rocker_dma_ring_info *info)
 465 {
 466         rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
 467
 468         dma_free_coherent(&rocker->pdev->dev,
 469                           info->size * sizeof(struct rocker_desc), info->desc,
 470                           info->mapaddr);
 471         kfree(info->desc_info);
 472 }
 473
 474 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
 475                                              struct rocker_dma_ring_info *info)
 476 {
 477         int i;
 478
 479         BUG_ON(info->head || info->tail);
 480
 481         /* When ring is consumer, we need to advance head for each desc.
 482          * That tells hw that the desc is ready to be used by it.
 483          */
 484         for (i = 0; i < info->size - 1; i++)
 485                 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
 486         rocker_desc_commit(&info->desc_info[i]);
 487 }
 488
 489 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
 490                                       const struct rocker_dma_ring_info *info,
 491                                       int direction, size_t buf_size)
 492 {
 493         struct pci_dev *pdev = rocker->pdev;
 494         int i;
 495         int err;
 496
 497         for (i = 0; i < info->size; i++) {
 498                 struct rocker_desc_info *desc_info = &info->desc_info[i];
 499                 struct rocker_desc *desc = &info->desc[i];
 500                 dma_addr_t dma_handle;
 501                 char *buf;
 502
 503                 buf = kzalloc(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
 526 rollback:
 527         for (i--; i >= 0; i--) {
 528                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 529
 530                 dma_unmap_single(&pdev->dev,
 531                                  dma_unmap_addr(desc_info, mapaddr),
 532                                  desc_info->data_size, direction);
 533                 kfree(desc_info->data);
 534         }
 535         return err;
 536 }
 537
 538 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
 539                                       const struct rocker_dma_ring_info *info,
 540                                       int direction)
 541 {
 542         struct pci_dev *pdev = rocker->pdev;
 543         int i;
 544
 545         for (i = 0; i < info->size; i++) {
 546                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 547                 struct rocker_desc *desc = &info->desc[i];
 548
 549                 desc->buf_addr = 0;
 550                 desc->buf_size = 0;
 551                 dma_unmap_single(&pdev->dev,
 552                                  dma_unmap_addr(desc_info, mapaddr),
 553                                  desc_info->data_size, direction);
 554                 kfree(desc_info->data);
 555         }
 556 }
 557
 558 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
 559 {
 560         struct rocker_wait *wait;
 561
 562         wait = rocker_wait_create();
 563         if (!wait)
 564                 return -ENOMEM;
 565         rocker_desc_cookie_ptr_set(desc_info, wait);
 566         return 0;
 567 }
 568
 569 static void
 570 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
 571 {
 572         struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
 573
 574         rocker_wait_destroy(wait);
 575 }
 576
 577 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
 578 {
 579         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 580         int i;
 581         int err;
 582
 583         for (i = 0; i < cmd_ring->size; i++) {
 584                 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
 585                 if (err)
 586                         goto rollback;
 587         }
 588         return 0;
 589
 590 rollback:
 591         for (i--; i >= 0; i--)
 592                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 593         return err;
 594 }
 595
 596 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
 597 {
 598         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 599         int i;
 600
 601         for (i = 0; i < cmd_ring->size; i++)
 602                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 603 }
 604
 605 static int rocker_dma_rings_init(struct rocker *rocker)
 606 {
 607         const struct pci_dev *pdev = rocker->pdev;
 608         int err;
 609
 610         err = rocker_dma_ring_create(rocker, 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
 650 err_dma_event_ring_bufs_alloc:
 651         rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 652 err_dma_event_ring_create:
 653         rocker_dma_cmd_ring_waits_free(rocker);
 654 err_dma_cmd_ring_waits_alloc:
 655         rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
 656                                   DMA_BIDIRECTIONAL);
 657 err_dma_cmd_ring_bufs_alloc:
 658         rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 659         return err;
 660 }
 661
 662 static void rocker_dma_rings_fini(struct rocker *rocker)
 663 {
 664         rocker_dma_ring_bufs_free(rocker, &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
 673 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
 674                                       struct rocker_desc_info *desc_info,
 675                                       struct sk_buff *skb, size_t buf_len)
 676 {
 677         const struct rocker *rocker = rocker_port->rocker;
 678         struct pci_dev *pdev = rocker->pdev;
 679         dma_addr_t dma_handle;
 680
 681         dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
 682                                     DMA_FROM_DEVICE);
 683         if (dma_mapping_error(&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
 691 tlv_put_failure:
 692         dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
 693         desc_info->tlv_size = 0;
 694         return -EMSGSIZE;
 695 }
 696
 697 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
 698 {
 699         return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 700 }
 701
 702 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
 703                                         struct rocker_desc_info *desc_info)
 704 {
 705         struct net_device *dev = rocker_port->dev;
 706         struct sk_buff *skb;
 707         size_t buf_len = rocker_port_rx_buf_len(rocker_port);
 708         int err;
 709
 710         /* Ensure that hw will see tlv_size zero in case of an error.
 711          * That tells hw to use another descriptor.
 712          */
 713         rocker_desc_cookie_ptr_set(desc_info, NULL);
 714         desc_info->tlv_size = 0;
 715
 716         skb = netdev_alloc_skb_ip_align(dev, 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
 728 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
 729                                          const struct rocker_tlv **attrs)
 730 {
 731         struct pci_dev *pdev = rocker->pdev;
 732         dma_addr_t dma_handle;
 733         size_t len;
 734
 735         if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
 736             !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
 737                 return;
 738         dma_handle = rocker_tlv_get_u64(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
 743 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
 744                                         const struct rocker_desc_info *desc_info)
 745 {
 746         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
 747         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
 748
 749         if (!skb)
 750                 return;
 751         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
 752         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
 753         dev_kfree_skb_any(skb);
 754 }
 755
 756 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
 757 {
 758         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 759         const struct rocker *rocker = rocker_port->rocker;
 760         int i;
 761         int err;
 762
 763         for (i = 0; i < rx_ring->size; i++) {
 764                 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
 765                                                    &rx_ring->desc_info[i]);
 766                 if (err)
 767                         goto rollback;
 768         }
 769         return 0;
 770
 771 rollback:
 772         for (i--; i >= 0; i--)
 773                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 774         return err;
 775 }
 776
 777 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
 778 {
 779         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 780         const struct rocker *rocker = rocker_port->rocker;
 781         int i;
 782
 783         for (i = 0; i < rx_ring->size; i++)
 784                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 785 }
 786
 787 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
 788 {
 789         struct rocker *rocker = rocker_port->rocker;
 790         int err;
 791
 792         err = rocker_dma_ring_create(rocker,
 793                                      ROCKER_DMA_TX(rocker_port->port_number),
 794                                      ROCKER_DMA_TX_DEFAULT_SIZE,
 795                                      &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
 835 err_dma_rx_ring_skbs_alloc:
 836         rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
 837                                   DMA_BIDIRECTIONAL);
 838 err_dma_rx_ring_bufs_alloc:
 839         rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 840 err_dma_rx_ring_create:
 841         rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
 842                                   DMA_TO_DEVICE);
 843 err_dma_tx_ring_bufs_alloc:
 844         rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 845         return err;
 846 }
 847
 848 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
 849 {
 850         struct rocker *rocker = rocker_port->rocker;
 851
 852         rocker_dma_rx_ring_skbs_free(rocker_port);
 853         rocker_dma_ring_bufs_free(rocker, &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
 861 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
 862                                    bool enable)
 863 {
 864         u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
 865
 866         if (enable)
 867                 val |= 1ULL << rocker_port->pport;
 868         else
 869                 val &= ~(1ULL << rocker_port->pport);
 870         rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
 871 }
 872
 873 /********************************
 874  * Interrupt handler and helpers
 875  ********************************/
 876
 877 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
 878 {
 879         struct rocker *rocker = dev_id;
 880         const struct rocker_desc_info *desc_info;
 881         struct rocker_wait *wait;
 882         u32 credits = 0;
 883
 884         spin_lock(&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
 900 static 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
 906 static 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
 912 static int rocker_event_link_change(const struct rocker *rocker,
 913                                     const struct rocker_tlv *info)
 914 {
 915         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
 916         unsigned int port_number;
 917         bool link_up;
 918         struct rocker_port *rocker_port;
 919
 920         rocker_tlv_parse_nested(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
 942 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
 943                                               const unsigned char *addr,
 944                                               __be16 vlan_id);
 945
 946 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
 947                                       const struct rocker_tlv *info)
 948 {
 949         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
 950         unsigned int port_number;
 951         struct rocker_port *rocker_port;
 952         const unsigned char *addr;
 953         __be16 vlan_id;
 954
 955         rocker_tlv_parse_nested(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
 972 static int rocker_event_process(const struct rocker *rocker,
 973                                 const struct rocker_desc_info *desc_info)
 974 {
 975         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
 976         const struct rocker_tlv *info;
 977         u16 type;
 978
 979         rocker_tlv_parse_desc(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
 997 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
 998 {
 999         struct rocker *rocker = dev_id;
1000         const struct pci_dev *pdev = rocker->pdev;
1001         const struct rocker_desc_info *desc_info;
1002         u32 credits = 0;
1003         int err;
1004
1005         while ((desc_info = rocker_desc_tail_get(&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
1025 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026 {
1027         struct rocker_port *rocker_port = dev_id;
1028
1029         napi_schedule(&rocker_port->napi_tx);
1030         return IRQ_HANDLED;
1031 }
1032
1033 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034 {
1035         struct rocker_port *rocker_port = dev_id;
1036
1037         napi_schedule(&rocker_port->napi_rx);
1038         return IRQ_HANDLED;
1039 }
1040
1041 /********************
1042  * Command interface
1043  ********************/
1044
1045 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046                     rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047                     rocker_cmd_proc_cb_t process, void *process_priv)
1048 {
1049         struct rocker *rocker = rocker_port->rocker;
1050         struct rocker_desc_info *desc_info;
1051         struct rocker_wait *wait;
1052         unsigned long lock_flags;
1053         int err;
1054
1055         spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057         desc_info = rocker_desc_head_get(&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
1094 static int
1095 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096                                   struct rocker_desc_info *desc_info,
1097                                   void *priv)
1098 {
1099         struct rocker_tlv *cmd_info;
1100
1101         if (rocker_tlv_put_u16(desc_info, 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
1114 static int
1115 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116                                           const struct rocker_desc_info *desc_info,
1117                                           void *priv)
1118 {
1119         struct ethtool_link_ksettings *ecmd = priv;
1120         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122         u32 speed;
1123         u8 duplex;
1124         u8 autoneg;
1125
1126         rocker_tlv_parse_desc(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
1153 static int
1154 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155                                           const struct rocker_desc_info *desc_info,
1156                                           void *priv)
1157 {
1158         unsigned char *macaddr = priv;
1159         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161         const struct rocker_tlv *attr;
1162
1163         rocker_tlv_parse_desc(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
1180 static int
1181 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182                                        const struct rocker_desc_info *desc_info,
1183                                        void *priv)
1184 {
1185         u8 *p_mode = priv;
1186         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188         const struct rocker_tlv *attr;
1189
1190         rocker_tlv_parse_desc(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
1204 struct port_name {
1205         char *buf;
1206         size_t len;
1207 };
1208
1209 static int
1210 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211                                             const struct rocker_desc_info *desc_info,
1212                                             void *priv)
1213 {
1214         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216         struct port_name *name = priv;
1217         const struct rocker_tlv *attr;
1218         size_t i, j, len;
1219         const char *str;
1220
1221         rocker_tlv_parse_desc(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
1250 static int
1251 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252                                           struct rocker_desc_info *desc_info,
1253                                           void *priv)
1254 {
1255         struct ethtool_link_ksettings *ecmd = priv;
1256         struct rocker_tlv *cmd_info;
1257
1258         if (rocker_tlv_put_u16(desc_info, 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
1280 static int
1281 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282                                           struct rocker_desc_info *desc_info,
1283                                           void *priv)
1284 {
1285         const unsigned char *macaddr = priv;
1286         struct rocker_tlv *cmd_info;
1287
1288         if (rocker_tlv_put_u16(desc_info, 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
1304 static int
1305 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306                                       struct rocker_desc_info *desc_info,
1307                                       void *priv)
1308 {
1309         int mtu = *(int *)priv;
1310         struct rocker_tlv *cmd_info;
1311
1312         if (rocker_tlv_put_u16(desc_info, 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
1328 static int
1329 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330                                   struct rocker_desc_info *desc_info,
1331                                   void *priv)
1332 {
1333         bool learning = *(bool *)priv;
1334         struct rocker_tlv *cmd_info;
1335
1336         if (rocker_tlv_put_u16(desc_info, 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
1352 static int
1353 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354                                      struct ethtool_link_ksettings *ecmd)
1355 {
1356         return rocker_cmd_exec(rocker_port, false,
1357                                rocker_cmd_get_port_settings_prep, NULL,
1358                                rocker_cmd_get_port_settings_ethtool_proc,
1359                                ecmd);
1360 }
1361
1362 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363                                                 unsigned char *macaddr)
1364 {
1365         return rocker_cmd_exec(rocker_port, false,
1366                                rocker_cmd_get_port_settings_prep, NULL,
1367                                rocker_cmd_get_port_settings_macaddr_proc,
1368                                macaddr);
1369 }
1370
1371 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372                                              u8 *p_mode)
1373 {
1374         return rocker_cmd_exec(rocker_port, false,
1375                                rocker_cmd_get_port_settings_prep, NULL,
1376                                rocker_cmd_get_port_settings_mode_proc, p_mode);
1377 }
1378
1379 static int
1380 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381                                      const struct ethtool_link_ksettings *ecmd)
1382 {
1383         struct ethtool_link_ksettings copy_ecmd;
1384
1385         memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387         return rocker_cmd_exec(rocker_port, false,
1388                                rocker_cmd_set_port_settings_ethtool_prep,
1389                                &copy_ecmd, NULL, NULL);
1390 }
1391
1392 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393                                                 unsigned char *macaddr)
1394 {
1395         return rocker_cmd_exec(rocker_port, false,
1396                                rocker_cmd_set_port_settings_macaddr_prep,
1397                                macaddr, NULL, NULL);
1398 }
1399
1400 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401                                             int mtu)
1402 {
1403         return rocker_cmd_exec(rocker_port, false,
1404                                rocker_cmd_set_port_settings_mtu_prep,
1405                                &mtu, NULL, NULL);
1406 }
1407
1408 int rocker_port_set_learning(struct rocker_port *rocker_port,
1409                              bool learning)
1410 {
1411         return rocker_cmd_exec(rocker_port, false,
1412                                rocker_cmd_set_port_learning_prep,
1413                                &learning, NULL, NULL);
1414 }
1415
1416 /**********************
1417  * Worlds manipulation
1418  **********************/
1419
1420 static struct rocker_world_ops *rocker_world_ops[] = {
1421         &rocker_ofdpa_ops,
1422 };
1423
1424 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427 {
1428         int i;
1429
1430         for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431                 if (rocker_world_ops[i]->mode == mode)
1432                         return rocker_world_ops[i];
1433         return NULL;
1434 }
1435
1436 static int rocker_world_init(struct rocker *rocker, u8 mode)
1437 {
1438         struct rocker_world_ops *wops;
1439         int err;
1440
1441         wops = rocker_world_ops_find(mode);
1442         if (!wops) {
1443                 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444                         mode);
1445                 return -EINVAL;
1446         }
1447         rocker->wops = wops;
1448         rocker->wpriv = kzalloc(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
1459 static void rocker_world_fini(struct rocker *rocker)
1460 {
1461         struct rocker_world_ops *wops = rocker->wops;
1462
1463         if (!wops || !wops->fini)
1464                 return;
1465         wops->fini(rocker);
1466         kfree(rocker->wpriv);
1467 }
1468
1469 static int rocker_world_check_init(struct rocker_port *rocker_port)
1470 {
1471         struct rocker *rocker = rocker_port->rocker;
1472         u8 mode;
1473         int err;
1474
1475         err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1476         if (err) {
1477                 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478                 return err;
1479         }
1480         if (rocker->wops) {
1481                 if (rocker->wops->mode != mode) {
1482                         dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483                         return -EINVAL;
1484                 }
1485                 return 0;
1486         }
1487         return rocker_world_init(rocker, mode);
1488 }
1489
1490 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491 {
1492         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493         int err;
1494
1495         rocker_port->wpriv = kzalloc(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
1506 static int rocker_world_port_init(struct rocker_port *rocker_port)
1507 {
1508         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510         if (!wops->port_init)
1511                 return 0;
1512         return wops->port_init(rocker_port);
1513 }
1514
1515 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516 {
1517         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519         if (!wops->port_fini)
1520                 return;
1521         wops->port_fini(rocker_port);
1522 }
1523
1524 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525 {
1526         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528         if (!wops->port_post_fini)
1529                 return;
1530         wops->port_post_fini(rocker_port);
1531         kfree(rocker_port->wpriv);
1532 }
1533
1534 static int rocker_world_port_open(struct rocker_port *rocker_port)
1535 {
1536         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538         if (!wops->port_open)
1539                 return 0;
1540         return wops->port_open(rocker_port);
1541 }
1542
1543 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544 {
1545         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547         if (!wops->port_stop)
1548                 return;
1549         wops->port_stop(rocker_port);
1550 }
1551
1552 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553                                                 u8 state,
1554                                                 struct switchdev_trans *trans)
1555 {
1556         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1557
1558         if (!wops->port_attr_stp_state_set)
1559                 return -EOPNOTSUPP;
1560
1561         if (switchdev_trans_ph_prepare(trans))
1562                 return 0;
1563
1564         return wops->port_attr_stp_state_set(rocker_port, state);
1565 }
1566
1567 static int
1568 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1569                                                 rocker_port,
1570                                                 unsigned long *
1571                                                 p_brport_flags_support)
1572 {
1573         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1574
1575         if (!wops->port_attr_bridge_flags_support_get)
1576                 return -EOPNOTSUPP;
1577         return wops->port_attr_bridge_flags_support_get(rocker_port,
1578                                                         p_brport_flags_support);
1579 }
1580
1581 static int
1582 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1583                                             unsigned long brport_flags,
1584                                             struct switchdev_trans *trans)
1585 {
1586         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1587         unsigned long brport_flags_s;
1588         int err;
1589
1590         if (!wops->port_attr_bridge_flags_set)
1591                 return -EOPNOTSUPP;
1592
1593         err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1594                                                               &brport_flags_s);
1595         if (err)
1596                 return err;
1597
1598         if (brport_flags & ~brport_flags_s)
1599                 return -EINVAL;
1600
1601         return 0;
1602 }
1603
1604 static int
1605 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1606                                         unsigned long brport_flags,
1607                                         struct switchdev_trans *trans)
1608 {
1609         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1610
1611         if (!wops->port_attr_bridge_flags_set)
1612                 return -EOPNOTSUPP;
1613
1614         if (switchdev_trans_ph_prepare(trans))
1615                 return 0;
1616
1617         return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1618                                                 trans);
1619 }
1620
1621 static int
1622 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1623                                               u32 ageing_time,
1624                                               struct switchdev_trans *trans)
1625
1626 {
1627         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629         if (!wops->port_attr_bridge_ageing_time_set)
1630                 return -EOPNOTSUPP;
1631
1632         if (switchdev_trans_ph_prepare(trans))
1633                 return 0;
1634
1635         return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1636                                                       trans);
1637 }
1638
1639 static int
1640 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1641                                const struct switchdev_obj_port_vlan *vlan,
1642                                struct switchdev_trans *trans)
1643 {
1644         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1645
1646         if (!wops->port_obj_vlan_add)
1647                 return -EOPNOTSUPP;
1648
1649         if (switchdev_trans_ph_prepare(trans))
1650                 return 0;
1651
1652         return wops->port_obj_vlan_add(rocker_port, vlan);
1653 }
1654
1655 static int
1656 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1657                                const struct switchdev_obj_port_vlan *vlan)
1658 {
1659         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1660
1661         if (netif_is_bridge_master(vlan->obj.orig_dev))
1662                 return -EOPNOTSUPP;
1663
1664         if (!wops->port_obj_vlan_del)
1665                 return -EOPNOTSUPP;
1666         return wops->port_obj_vlan_del(rocker_port, vlan);
1667 }
1668
1669 static int
1670 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1671                           struct switchdev_notifier_fdb_info *info)
1672 {
1673         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1674
1675         if (!wops->port_obj_fdb_add)
1676                 return -EOPNOTSUPP;
1677
1678         return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1679 }
1680
1681 static int
1682 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1683                           struct switchdev_notifier_fdb_info *info)
1684 {
1685         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1686
1687         if (!wops->port_obj_fdb_del)
1688                 return -EOPNOTSUPP;
1689         return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1690 }
1691
1692 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1693                                            struct net_device *master)
1694 {
1695         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1696
1697         if (!wops->port_master_linked)
1698                 return -EOPNOTSUPP;
1699         return wops->port_master_linked(rocker_port, master);
1700 }
1701
1702 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1703                                              struct net_device *master)
1704 {
1705         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1706
1707         if (!wops->port_master_unlinked)
1708                 return -EOPNOTSUPP;
1709         return wops->port_master_unlinked(rocker_port, master);
1710 }
1711
1712 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1713                                           struct neighbour *n)
1714 {
1715         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1716
1717         if (!wops->port_neigh_update)
1718                 return -EOPNOTSUPP;
1719         return wops->port_neigh_update(rocker_port, n);
1720 }
1721
1722 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1723                                            struct neighbour *n)
1724 {
1725         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1726
1727         if (!wops->port_neigh_destroy)
1728                 return -EOPNOTSUPP;
1729         return wops->port_neigh_destroy(rocker_port, n);
1730 }
1731
1732 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1733                                               const unsigned char *addr,
1734                                               __be16 vlan_id)
1735 {
1736         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1737
1738         if (!wops->port_ev_mac_vlan_seen)
1739                 return -EOPNOTSUPP;
1740         return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1741 }
1742
1743 static int rocker_world_fib4_add(struct rocker *rocker,
1744                                  const struct fib_entry_notifier_info *fen_info)
1745 {
1746         struct rocker_world_ops *wops = rocker->wops;
1747
1748         if (!wops->fib4_add)
1749                 return 0;
1750         return wops->fib4_add(rocker, fen_info);
1751 }
1752
1753 static int rocker_world_fib4_del(struct rocker *rocker,
1754                                  const struct fib_entry_notifier_info *fen_info)
1755 {
1756         struct rocker_world_ops *wops = rocker->wops;
1757
1758         if (!wops->fib4_del)
1759                 return 0;
1760         return wops->fib4_del(rocker, fen_info);
1761 }
1762
1763 static void rocker_world_fib4_abort(struct rocker *rocker)
1764 {
1765         struct rocker_world_ops *wops = rocker->wops;
1766
1767         if (wops->fib4_abort)
1768                 wops->fib4_abort(rocker);
1769 }
1770
1771 /*****************
1772  * Net device ops
1773  *****************/
1774
1775 static int rocker_port_open(struct net_device *dev)
1776 {
1777         struct rocker_port *rocker_port = netdev_priv(dev);
1778         int err;
1779
1780         err = rocker_port_dma_rings_init(rocker_port);
1781         if (err)
1782                 return err;
1783
1784         err = request_irq(rocker_msix_tx_vector(rocker_port),
1785                           rocker_tx_irq_handler, 0,
1786                           rocker_driver_name, rocker_port);
1787         if (err) {
1788                 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1789                 goto err_request_tx_irq;
1790         }
1791
1792         err = request_irq(rocker_msix_rx_vector(rocker_port),
1793                           rocker_rx_irq_handler, 0,
1794                           rocker_driver_name, rocker_port);
1795         if (err) {
1796                 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1797                 goto err_request_rx_irq;
1798         }
1799
1800         err = rocker_world_port_open(rocker_port);
1801         if (err) {
1802                 netdev_err(rocker_port->dev, "cannot open port in world\n");
1803                 goto err_world_port_open;
1804         }
1805
1806         napi_enable(&rocker_port->napi_tx);
1807         napi_enable(&rocker_port->napi_rx);
1808         if (!dev->proto_down)
1809                 rocker_port_set_enable(rocker_port, true);
1810         netif_start_queue(dev);
1811         return 0;
1812
1813 err_world_port_open:
1814         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1815 err_request_rx_irq:
1816         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1817 err_request_tx_irq:
1818         rocker_port_dma_rings_fini(rocker_port);
1819         return err;
1820 }
1821
1822 static int rocker_port_stop(struct net_device *dev)
1823 {
1824         struct rocker_port *rocker_port = netdev_priv(dev);
1825
1826         netif_stop_queue(dev);
1827         rocker_port_set_enable(rocker_port, false);
1828         napi_disable(&rocker_port->napi_rx);
1829         napi_disable(&rocker_port->napi_tx);
1830         rocker_world_port_stop(rocker_port);
1831         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1832         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1833         rocker_port_dma_rings_fini(rocker_port);
1834
1835         return 0;
1836 }
1837
1838 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1839                                        const struct rocker_desc_info *desc_info)
1840 {
1841         const struct rocker *rocker = rocker_port->rocker;
1842         struct pci_dev *pdev = rocker->pdev;
1843         const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1844         struct rocker_tlv *attr;
1845         int rem;
1846
1847         rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1848         if (!attrs[ROCKER_TLV_TX_FRAGS])
1849                 return;
1850         rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1851                 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1852                 dma_addr_t dma_handle;
1853                 size_t len;
1854
1855                 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1856                         continue;
1857                 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1858                                         attr);
1859                 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1860                     !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1861                         continue;
1862                 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1863                 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1864                 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1865         }
1866 }
1867
1868 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1869                                        struct rocker_desc_info *desc_info,
1870                                        char *buf, size_t buf_len)
1871 {
1872         const struct rocker *rocker = rocker_port->rocker;
1873         struct pci_dev *pdev = rocker->pdev;
1874         dma_addr_t dma_handle;
1875         struct rocker_tlv *frag;
1876
1877         dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1878         if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1879                 if (net_ratelimit())
1880                         netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1881                 return -EIO;
1882         }
1883         frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1884         if (!frag)
1885                 goto unmap_frag;
1886         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1887                                dma_handle))
1888                 goto nest_cancel;
1889         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1890                                buf_len))
1891                 goto nest_cancel;
1892         rocker_tlv_nest_end(desc_info, frag);
1893         return 0;
1894
1895 nest_cancel:
1896         rocker_tlv_nest_cancel(desc_info, frag);
1897 unmap_frag:
1898         dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1899         return -EMSGSIZE;
1900 }
1901
1902 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1903 {
1904         struct rocker_port *rocker_port = netdev_priv(dev);
1905         struct rocker *rocker = rocker_port->rocker;
1906         struct rocker_desc_info *desc_info;
1907         struct rocker_tlv *frags;
1908         int i;
1909         int err;
1910
1911         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1912         if (unlikely(!desc_info)) {
1913                 if (net_ratelimit())
1914                         netdev_err(dev, "tx ring full when queue awake\n");
1915                 return NETDEV_TX_BUSY;
1916         }
1917
1918         rocker_desc_cookie_ptr_set(desc_info, skb);
1919
1920         frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1921         if (!frags)
1922                 goto out;
1923         err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1924                                           skb->data, skb_headlen(skb));
1925         if (err)
1926                 goto nest_cancel;
1927         if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1928                 err = skb_linearize(skb);
1929                 if (err)
1930                         goto unmap_frags;
1931         }
1932
1933         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1934                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1935
1936                 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1937                                                   skb_frag_address(frag),
1938                                                   skb_frag_size(frag));
1939                 if (err)
1940                         goto unmap_frags;
1941         }
1942         rocker_tlv_nest_end(desc_info, frags);
1943
1944         rocker_desc_gen_clear(desc_info);
1945         rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1946
1947         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1948         if (!desc_info)
1949                 netif_stop_queue(dev);
1950
1951         return NETDEV_TX_OK;
1952
1953 unmap_frags:
1954         rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1955 nest_cancel:
1956         rocker_tlv_nest_cancel(desc_info, frags);
1957 out:
1958         dev_kfree_skb(skb);
1959         dev->stats.tx_dropped++;
1960
1961         return NETDEV_TX_OK;
1962 }
1963
1964 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1965 {
1966         struct sockaddr *addr = p;
1967         struct rocker_port *rocker_port = netdev_priv(dev);
1968         int err;
1969
1970         if (!is_valid_ether_addr(addr->sa_data))
1971                 return -EADDRNOTAVAIL;
1972
1973         err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1974         if (err)
1975                 return err;
1976         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1977         return 0;
1978 }
1979
1980 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1981 {
1982         struct rocker_port *rocker_port = netdev_priv(dev);
1983         int running = netif_running(dev);
1984         int err;
1985
1986         if (running)
1987                 rocker_port_stop(dev);
1988
1989         netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1990         dev->mtu = new_mtu;
1991
1992         err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1993         if (err)
1994                 return err;
1995
1996         if (running)
1997                 err = rocker_port_open(dev);
1998
1999         return err;
2000 }
2001
2002 static int rocker_port_get_phys_port_name(struct net_device *dev,
2003                                           char *buf, size_t len)
2004 {
2005         struct rocker_port *rocker_port = netdev_priv(dev);
2006         struct port_name name = { .buf = buf, .len = len };
2007         int err;
2008
2009         err = rocker_cmd_exec(rocker_port, false,
2010                               rocker_cmd_get_port_settings_prep, NULL,
2011                               rocker_cmd_get_port_settings_phys_name_proc,
2012                               &name);
2013
2014         return err ? -EOPNOTSUPP : 0;
2015 }
2016
2017 static int rocker_port_change_proto_down(struct net_device *dev,
2018                                          bool proto_down)
2019 {
2020         struct rocker_port *rocker_port = netdev_priv(dev);
2021
2022         if (rocker_port->dev->flags & IFF_UP)
2023                 rocker_port_set_enable(rocker_port, !proto_down);
2024         rocker_port->dev->proto_down = proto_down;
2025         return 0;
2026 }
2027
2028 static void rocker_port_neigh_destroy(struct net_device *dev,
2029                                       struct neighbour *n)
2030 {
2031         struct rocker_port *rocker_port = netdev_priv(n->dev);
2032         int err;
2033
2034         err = rocker_world_port_neigh_destroy(rocker_port, n);
2035         if (err)
2036                 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2037                             err);
2038 }
2039
2040 static int rocker_port_get_port_parent_id(struct net_device *dev,
2041                                           struct netdev_phys_item_id *ppid)
2042 {
2043         const struct rocker_port *rocker_port = netdev_priv(dev);
2044         const struct rocker *rocker = rocker_port->rocker;
2045
2046         ppid->id_len = sizeof(rocker->hw.id);
2047         memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2048
2049         return 0;
2050 }
2051
2052 static const struct net_device_ops rocker_port_netdev_ops = {
2053         .ndo_open                       = rocker_port_open,
2054         .ndo_stop                       = rocker_port_stop,
2055         .ndo_start_xmit                 = rocker_port_xmit,
2056         .ndo_set_mac_address            = rocker_port_set_mac_address,
2057         .ndo_change_mtu                 = rocker_port_change_mtu,
2058         .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
2059         .ndo_change_proto_down          = rocker_port_change_proto_down,
2060         .ndo_neigh_destroy              = rocker_port_neigh_destroy,
2061         .ndo_get_port_parent_id         = rocker_port_get_port_parent_id,
2062 };
2063
2064 /********************
2065  * swdev interface
2066  ********************/
2067
2068 static int rocker_port_attr_set(struct net_device *dev,
2069                                 const struct switchdev_attr *attr,
2070                                 struct switchdev_trans *trans)
2071 {
2072         struct rocker_port *rocker_port = netdev_priv(dev);
2073         int err = 0;
2074
2075         switch (attr->id) {
2076         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2077                 err = rocker_world_port_attr_stp_state_set(rocker_port,
2078                                                            attr->u.stp_state,
2079                                                            trans);
2080                 break;
2081         case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2082                 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2083                                                               attr->u.brport_flags,
2084                                                               trans);
2085                 break;
2086         case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2087                 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2088                                                               attr->u.brport_flags,
2089                                                               trans);
2090                 break;
2091         case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2092                 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2093                                                                     attr->u.ageing_time,
2094                                                                     trans);
2095                 break;
2096         default:
2097                 err = -EOPNOTSUPP;
2098                 break;
2099         }
2100
2101         return err;
2102 }
2103
2104 static int rocker_port_obj_add(struct net_device *dev,
2105                                const struct switchdev_obj *obj,
2106                                struct switchdev_trans *trans)
2107 {
2108         struct rocker_port *rocker_port = netdev_priv(dev);
2109         int err = 0;
2110
2111         switch (obj->id) {
2112         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2113                 err = rocker_world_port_obj_vlan_add(rocker_port,
2114                                                      SWITCHDEV_OBJ_PORT_VLAN(obj),
2115                                                      trans);
2116                 break;
2117         default:
2118                 err = -EOPNOTSUPP;
2119                 break;
2120         }
2121
2122         return err;
2123 }
2124
2125 static int rocker_port_obj_del(struct net_device *dev,
2126                                const struct switchdev_obj *obj)
2127 {
2128         struct rocker_port *rocker_port = netdev_priv(dev);
2129         int err = 0;
2130
2131         switch (obj->id) {
2132         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2133                 err = rocker_world_port_obj_vlan_del(rocker_port,
2134                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2135                 break;
2136         default:
2137                 err = -EOPNOTSUPP;
2138                 break;
2139         }
2140
2141         return err;
2142 }
2143
2144 struct rocker_fib_event_work {
2145         struct work_struct work;
2146         union {
2147                 struct fib_entry_notifier_info fen_info;
2148                 struct fib_rule_notifier_info fr_info;
2149         };
2150         struct rocker *rocker;
2151         unsigned long event;
2152 };
2153
2154 static void rocker_router_fib_event_work(struct work_struct *work)
2155 {
2156         struct rocker_fib_event_work *fib_work =
2157                 container_of(work, struct rocker_fib_event_work, work);
2158         struct rocker *rocker = fib_work->rocker;
2159         struct fib_rule *rule;
2160         int err;
2161
2162         /* Protect internal structures from changes */
2163         rtnl_lock();
2164         switch (fib_work->event) {
2165         case FIB_EVENT_ENTRY_REPLACE:
2166                 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2167                 if (err)
2168                         rocker_world_fib4_abort(rocker);
2169                 fib_info_put(fib_work->fen_info.fi);
2170                 break;
2171         case FIB_EVENT_ENTRY_DEL:
2172                 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2173                 fib_info_put(fib_work->fen_info.fi);
2174                 break;
2175         case FIB_EVENT_RULE_ADD:
2176         case FIB_EVENT_RULE_DEL:
2177                 rule = fib_work->fr_info.rule;
2178                 if (!fib4_rule_default(rule))
2179                         rocker_world_fib4_abort(rocker);
2180                 fib_rule_put(rule);
2181                 break;
2182         }
2183         rtnl_unlock();
2184         kfree(fib_work);
2185 }
2186
2187 /* Called with rcu_read_lock() */
2188 static int rocker_router_fib_event(struct notifier_block *nb,
2189                                    unsigned long event, void *ptr)
2190 {
2191         struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2192         struct rocker_fib_event_work *fib_work;
2193         struct fib_notifier_info *info = ptr;
2194
2195         if (info->family != AF_INET)
2196                 return NOTIFY_DONE;
2197
2198         fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2199         if (WARN_ON(!fib_work))
2200                 return NOTIFY_BAD;
2201
2202         INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2203         fib_work->rocker = rocker;
2204         fib_work->event = event;
2205
2206         switch (event) {
2207         case FIB_EVENT_ENTRY_REPLACE:
2208         case FIB_EVENT_ENTRY_DEL:
2209                 if (info->family == AF_INET) {
2210                         struct fib_entry_notifier_info *fen_info = ptr;
2211
2212                         if (fen_info->fi->fib_nh_is_v6) {
2213                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2214                                 kfree(fib_work);
2215                                 return notifier_from_errno(-EINVAL);
2216                         }
2217                         if (fen_info->fi->nh) {
2218                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2219                                 kfree(fib_work);
2220                                 return notifier_from_errno(-EINVAL);
2221                         }
2222                 }
2223
2224                 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2225                 /* Take referece on fib_info to prevent it from being
2226                  * freed while work is queued. Release it afterwards.
2227                  */
2228                 fib_info_hold(fib_work->fen_info.fi);
2229                 break;
2230         case FIB_EVENT_RULE_ADD:
2231         case FIB_EVENT_RULE_DEL:
2232                 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2233                 fib_rule_get(fib_work->fr_info.rule);
2234                 break;
2235         }
2236
2237         queue_work(rocker->rocker_owq, &fib_work->work);
2238
2239         return NOTIFY_DONE;
2240 }
2241
2242 /********************
2243  * ethtool interface
2244  ********************/
2245
2246 static int
2247 rocker_port_get_link_ksettings(struct net_device *dev,
2248                                struct ethtool_link_ksettings *ecmd)
2249 {
2250         struct rocker_port *rocker_port = netdev_priv(dev);
2251
2252         return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2253 }
2254
2255 static int
2256 rocker_port_set_link_ksettings(struct net_device *dev,
2257                                const struct ethtool_link_ksettings *ecmd)
2258 {
2259         struct rocker_port *rocker_port = netdev_priv(dev);
2260
2261         return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2262 }
2263
2264 static void rocker_port_get_drvinfo(struct net_device *dev,
2265                                     struct ethtool_drvinfo *drvinfo)
2266 {
2267         strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2268         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2269 }
2270
2271 static struct rocker_port_stats {
2272         char str[ETH_GSTRING_LEN];
2273         int type;
2274 } rocker_port_stats[] = {
2275         { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2276         { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2277         { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2278         { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2279
2280         { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2281         { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2282         { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2283         { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2284 };
2285
2286 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2287
2288 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2289                                     u8 *data)
2290 {
2291         u8 *p = data;
2292         int i;
2293
2294         switch (stringset) {
2295         case ETH_SS_STATS:
2296                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2297                         memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2298                         p += ETH_GSTRING_LEN;
2299                 }
2300                 break;
2301         }
2302 }
2303
2304 static int
2305 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2306                                struct rocker_desc_info *desc_info,
2307                                void *priv)
2308 {
2309         struct rocker_tlv *cmd_stats;
2310
2311         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2312                                ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2313                 return -EMSGSIZE;
2314
2315         cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2316         if (!cmd_stats)
2317                 return -EMSGSIZE;
2318
2319         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2320                                rocker_port->pport))
2321                 return -EMSGSIZE;
2322
2323         rocker_tlv_nest_end(desc_info, cmd_stats);
2324
2325         return 0;
2326 }
2327
2328 static int
2329 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2330                                        const struct rocker_desc_info *desc_info,
2331                                        void *priv)
2332 {
2333         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2334         const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2335         const struct rocker_tlv *pattr;
2336         u32 pport;
2337         u64 *data = priv;
2338         int i;
2339
2340         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2341
2342         if (!attrs[ROCKER_TLV_CMD_INFO])
2343                 return -EIO;
2344
2345         rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2346                                 attrs[ROCKER_TLV_CMD_INFO]);
2347
2348         if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2349                 return -EIO;
2350
2351         pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2352         if (pport != rocker_port->pport)
2353                 return -EIO;
2354
2355         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2356                 pattr = stats_attrs[rocker_port_stats[i].type];
2357                 if (!pattr)
2358                         continue;
2359
2360                 data[i] = rocker_tlv_get_u64(pattr);
2361         }
2362
2363         return 0;
2364 }
2365
2366 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2367                                              void *priv)
2368 {
2369         return rocker_cmd_exec(rocker_port, false,
2370                                rocker_cmd_get_port_stats_prep, NULL,
2371                                rocker_cmd_get_port_stats_ethtool_proc,
2372                                priv);
2373 }
2374
2375 static void rocker_port_get_stats(struct net_device *dev,
2376                                   struct ethtool_stats *stats, u64 *data)
2377 {
2378         struct rocker_port *rocker_port = netdev_priv(dev);
2379
2380         if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2381                 int i;
2382
2383                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2384                         data[i] = 0;
2385         }
2386 }
2387
2388 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2389 {
2390         switch (sset) {
2391         case ETH_SS_STATS:
2392                 return ROCKER_PORT_STATS_LEN;
2393         default:
2394                 return -EOPNOTSUPP;
2395         }
2396 }
2397
2398 static const struct ethtool_ops rocker_port_ethtool_ops = {
2399         .get_drvinfo            = rocker_port_get_drvinfo,
2400         .get_link               = ethtool_op_get_link,
2401         .get_strings            = rocker_port_get_strings,
2402         .get_ethtool_stats      = rocker_port_get_stats,
2403         .get_sset_count         = rocker_port_get_sset_count,
2404         .get_link_ksettings     = rocker_port_get_link_ksettings,
2405         .set_link_ksettings     = rocker_port_set_link_ksettings,
2406 };
2407
2408 /*****************
2409  * NAPI interface
2410  *****************/
2411
2412 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2413 {
2414         return container_of(napi, struct rocker_port, napi_tx);
2415 }
2416
2417 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2418 {
2419         struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2420         const struct rocker *rocker = rocker_port->rocker;
2421         const struct rocker_desc_info *desc_info;
2422         u32 credits = 0;
2423         int err;
2424
2425         /* Cleanup tx descriptors */
2426         while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2427                 struct sk_buff *skb;
2428
2429                 err = rocker_desc_err(desc_info);
2430                 if (err && net_ratelimit())
2431                         netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2432                                    err);
2433                 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2434
2435                 skb = rocker_desc_cookie_ptr_get(desc_info);
2436                 if (err == 0) {
2437                         rocker_port->dev->stats.tx_packets++;
2438                         rocker_port->dev->stats.tx_bytes += skb->len;
2439                 } else {
2440                         rocker_port->dev->stats.tx_errors++;
2441                 }
2442
2443                 dev_kfree_skb_any(skb);
2444                 credits++;
2445         }
2446
2447         if (credits && netif_queue_stopped(rocker_port->dev))
2448                 netif_wake_queue(rocker_port->dev);
2449
2450         napi_complete(napi);
2451         rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2452
2453         return 0;
2454 }
2455
2456 static int rocker_port_rx_proc(const struct rocker *rocker,
2457                                const struct rocker_port *rocker_port,
2458                                struct rocker_desc_info *desc_info)
2459 {
2460         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2461         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2462         size_t rx_len;
2463         u16 rx_flags = 0;
2464
2465         if (!skb)
2466                 return -ENOENT;
2467
2468         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2469         if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2470                 return -EINVAL;
2471         if (attrs[ROCKER_TLV_RX_FLAGS])
2472                 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2473
2474         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2475
2476         rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2477         skb_put(skb, rx_len);
2478         skb->protocol = eth_type_trans(skb, rocker_port->dev);
2479
2480         if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2481                 skb->offload_fwd_mark = 1;
2482
2483         rocker_port->dev->stats.rx_packets++;
2484         rocker_port->dev->stats.rx_bytes += skb->len;
2485
2486         netif_receive_skb(skb);
2487
2488         return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2489 }
2490
2491 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2492 {
2493         return container_of(napi, struct rocker_port, napi_rx);
2494 }
2495
2496 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2497 {
2498         struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2499         const struct rocker *rocker = rocker_port->rocker;
2500         struct rocker_desc_info *desc_info;
2501         u32 credits = 0;
2502         int err;
2503
2504         /* Process rx descriptors */
2505         while (credits < budget &&
2506                (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2507                 err = rocker_desc_err(desc_info);
2508                 if (err) {
2509                         if (net_ratelimit())
2510                                 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2511                                            err);
2512                 } else {
2513                         err = rocker_port_rx_proc(rocker, rocker_port,
2514                                                   desc_info);
2515                         if (err && net_ratelimit())
2516                                 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2517                                            err);
2518                 }
2519                 if (err)
2520                         rocker_port->dev->stats.rx_errors++;
2521
2522                 rocker_desc_gen_clear(desc_info);
2523                 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2524                 credits++;
2525         }
2526
2527         if (credits < budget)
2528                 napi_complete_done(napi, credits);
2529
2530         rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2531
2532         return credits;
2533 }
2534
2535 /*****************
2536  * PCI driver ops
2537  *****************/
2538
2539 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2540 {
2541         const struct rocker *rocker = rocker_port->rocker;
2542         u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2543         bool link_up;
2544
2545         link_up = link_status & (1 << rocker_port->pport);
2546         if (link_up)
2547                 netif_carrier_on(rocker_port->dev);
2548         else
2549                 netif_carrier_off(rocker_port->dev);
2550 }
2551
2552 static void rocker_remove_ports(struct rocker *rocker)
2553 {
2554         struct rocker_port *rocker_port;
2555         int i;
2556
2557         for (i = 0; i < rocker->port_count; i++) {
2558                 rocker_port = rocker->ports[i];
2559                 if (!rocker_port)
2560                         continue;
2561                 rocker_world_port_fini(rocker_port);
2562                 unregister_netdev(rocker_port->dev);
2563                 rocker_world_port_post_fini(rocker_port);
2564                 free_netdev(rocker_port->dev);
2565         }
2566         rocker_world_fini(rocker);
2567         kfree(rocker->ports);
2568 }
2569
2570 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2571 {
2572         const struct rocker *rocker = rocker_port->rocker;
2573         const struct pci_dev *pdev = rocker->pdev;
2574         int err;
2575
2576         err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2577                                                    rocker_port->dev->dev_addr);
2578         if (err) {
2579                 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2580                 eth_hw_addr_random(rocker_port->dev);
2581         }
2582 }
2583
2584 #define ROCKER_PORT_MIN_MTU     ETH_MIN_MTU
2585 #define ROCKER_PORT_MAX_MTU     9000
2586 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2587 {
2588         struct pci_dev *pdev = rocker->pdev;
2589         struct rocker_port *rocker_port;
2590         struct net_device *dev;
2591         int err;
2592
2593         dev = alloc_etherdev(sizeof(struct rocker_port));
2594         if (!dev)
2595                 return -ENOMEM;
2596         SET_NETDEV_DEV(dev, &pdev->dev);
2597         rocker_port = netdev_priv(dev);
2598         rocker_port->dev = dev;
2599         rocker_port->rocker = rocker;
2600         rocker_port->port_number = port_number;
2601         rocker_port->pport = port_number + 1;
2602
2603         err = rocker_world_check_init(rocker_port);
2604         if (err) {
2605                 dev_err(&pdev->dev, "world init failed\n");
2606                 goto err_world_check_init;
2607         }
2608
2609         rocker_port_dev_addr_init(rocker_port);
2610         dev->netdev_ops = &rocker_port_netdev_ops;
2611         dev->ethtool_ops = &rocker_port_ethtool_ops;
2612         netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2613                           NAPI_POLL_WEIGHT);
2614         netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2615                        NAPI_POLL_WEIGHT);
2616         rocker_carrier_init(rocker_port);
2617
2618         dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2619
2620         /* MTU range: 68 - 9000 */
2621         dev->min_mtu = ROCKER_PORT_MIN_MTU;
2622         dev->max_mtu = ROCKER_PORT_MAX_MTU;
2623
2624         err = rocker_world_port_pre_init(rocker_port);
2625         if (err) {
2626                 dev_err(&pdev->dev, "port world pre-init failed\n");
2627                 goto err_world_port_pre_init;
2628         }
2629         err = register_netdev(dev);
2630         if (err) {
2631                 dev_err(&pdev->dev, "register_netdev failed\n");
2632                 goto err_register_netdev;
2633         }
2634         rocker->ports[port_number] = rocker_port;
2635
2636         err = rocker_world_port_init(rocker_port);
2637         if (err) {
2638                 dev_err(&pdev->dev, "port world init failed\n");
2639                 goto err_world_port_init;
2640         }
2641
2642         return 0;
2643
2644 err_world_port_init:
2645         rocker->ports[port_number] = NULL;
2646         unregister_netdev(dev);
2647 err_register_netdev:
2648         rocker_world_port_post_fini(rocker_port);
2649 err_world_port_pre_init:
2650 err_world_check_init:
2651         free_netdev(dev);
2652         return err;
2653 }
2654
2655 static int rocker_probe_ports(struct rocker *rocker)
2656 {
2657         int i;
2658         size_t alloc_size;
2659         int err;
2660
2661         alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2662         rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2663         if (!rocker->ports)
2664                 return -ENOMEM;
2665         for (i = 0; i < rocker->port_count; i++) {
2666                 err = rocker_probe_port(rocker, i);
2667                 if (err)
2668                         goto remove_ports;
2669         }
2670         return 0;
2671
2672 remove_ports:
2673         rocker_remove_ports(rocker);
2674         return err;
2675 }
2676
2677 static int rocker_msix_init(struct rocker *rocker)
2678 {
2679         struct pci_dev *pdev = rocker->pdev;
2680         int msix_entries;
2681         int i;
2682         int err;
2683
2684         msix_entries = pci_msix_vec_count(pdev);
2685         if (msix_entries < 0)
2686                 return msix_entries;
2687
2688         if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2689                 return -EINVAL;
2690
2691         rocker->msix_entries = kmalloc_array(msix_entries,
2692                                              sizeof(struct msix_entry),
2693                                              GFP_KERNEL);
2694         if (!rocker->msix_entries)
2695                 return -ENOMEM;
2696
2697         for (i = 0; i < msix_entries; i++)
2698                 rocker->msix_entries[i].entry = i;
2699
2700         err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2701         if (err < 0)
2702                 goto err_enable_msix;
2703
2704         return 0;
2705
2706 err_enable_msix:
2707         kfree(rocker->msix_entries);
2708         return err;
2709 }
2710
2711 static void rocker_msix_fini(const struct rocker *rocker)
2712 {
2713         pci_disable_msix(rocker->pdev);
2714         kfree(rocker->msix_entries);
2715 }
2716
2717 static bool rocker_port_dev_check(const struct net_device *dev)
2718 {
2719         return dev->netdev_ops == &rocker_port_netdev_ops;
2720 }
2721
2722 static int
2723 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2724                 struct switchdev_notifier_port_attr_info *port_attr_info)
2725 {
2726         int err;
2727
2728         err = rocker_port_attr_set(netdev, port_attr_info->attr,
2729                                    port_attr_info->trans);
2730
2731         port_attr_info->handled = true;
2732         return notifier_from_errno(err);
2733 }
2734
2735 struct rocker_switchdev_event_work {
2736         struct work_struct work;
2737         struct switchdev_notifier_fdb_info fdb_info;
2738         struct rocker_port *rocker_port;
2739         unsigned long event;
2740 };
2741
2742 static void
2743 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2744                           struct switchdev_notifier_fdb_info *recv_info)
2745 {
2746         struct switchdev_notifier_fdb_info info;
2747
2748         info.addr = recv_info->addr;
2749         info.vid = recv_info->vid;
2750         info.offloaded = true;
2751         call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2752                                  rocker_port->dev, &info.info, NULL);
2753 }
2754
2755 static void rocker_switchdev_event_work(struct work_struct *work)
2756 {
2757         struct rocker_switchdev_event_work *switchdev_work =
2758                 container_of(work, struct rocker_switchdev_event_work, work);
2759         struct rocker_port *rocker_port = switchdev_work->rocker_port;
2760         struct switchdev_notifier_fdb_info *fdb_info;
2761         int err;
2762
2763         rtnl_lock();
2764         switch (switchdev_work->event) {
2765         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2766                 fdb_info = &switchdev_work->fdb_info;
2767                 if (!fdb_info->added_by_user)
2768                         break;
2769                 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2770                 if (err) {
2771                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2772                         break;
2773                 }
2774                 rocker_fdb_offload_notify(rocker_port, fdb_info);
2775                 break;
2776         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2777                 fdb_info = &switchdev_work->fdb_info;
2778                 if (!fdb_info->added_by_user)
2779                         break;
2780                 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2781                 if (err)
2782                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2783                 break;
2784         }
2785         rtnl_unlock();
2786
2787         kfree(switchdev_work->fdb_info.addr);
2788         kfree(switchdev_work);
2789         dev_put(rocker_port->dev);
2790 }
2791
2792 /* called under rcu_read_lock() */
2793 static int rocker_switchdev_event(struct notifier_block *unused,
2794                                   unsigned long event, void *ptr)
2795 {
2796         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2797         struct rocker_switchdev_event_work *switchdev_work;
2798         struct switchdev_notifier_fdb_info *fdb_info = ptr;
2799         struct rocker_port *rocker_port;
2800
2801         if (!rocker_port_dev_check(dev))
2802                 return NOTIFY_DONE;
2803
2804         if (event == SWITCHDEV_PORT_ATTR_SET)
2805                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2806
2807         rocker_port = netdev_priv(dev);
2808         switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2809         if (WARN_ON(!switchdev_work))
2810                 return NOTIFY_BAD;
2811
2812         INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2813         switchdev_work->rocker_port = rocker_port;
2814         switchdev_work->event = event;
2815
2816         switch (event) {
2817         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2818         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2819                 memcpy(&switchdev_work->fdb_info, ptr,
2820                        sizeof(switchdev_work->fdb_info));
2821                 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2822                 if (unlikely(!switchdev_work->fdb_info.addr)) {
2823                         kfree(switchdev_work);
2824                         return NOTIFY_BAD;
2825                 }
2826
2827                 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2828                                 fdb_info->addr);
2829                 /* Take a reference on the rocker device */
2830                 dev_hold(dev);
2831                 break;
2832         default:
2833                 kfree(switchdev_work);
2834                 return NOTIFY_DONE;
2835         }
2836
2837         queue_work(rocker_port->rocker->rocker_owq,
2838                    &switchdev_work->work);
2839         return NOTIFY_DONE;
2840 }
2841
2842 static int
2843 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2844                         struct switchdev_notifier_port_obj_info *port_obj_info)
2845 {
2846         int err = -EOPNOTSUPP;
2847
2848         switch (event) {
2849         case SWITCHDEV_PORT_OBJ_ADD:
2850                 err = rocker_port_obj_add(netdev, port_obj_info->obj,
2851                                           port_obj_info->trans);
2852                 break;
2853         case SWITCHDEV_PORT_OBJ_DEL:
2854                 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2855                 break;
2856         }
2857
2858         port_obj_info->handled = true;
2859         return notifier_from_errno(err);
2860 }
2861
2862 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2863                                            unsigned long event, void *ptr)
2864 {
2865         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2866
2867         if (!rocker_port_dev_check(dev))
2868                 return NOTIFY_DONE;
2869
2870         switch (event) {
2871         case SWITCHDEV_PORT_OBJ_ADD:
2872         case SWITCHDEV_PORT_OBJ_DEL:
2873                 return rocker_switchdev_port_obj_event(event, dev, ptr);
2874         case SWITCHDEV_PORT_ATTR_SET:
2875                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2876         }
2877
2878         return NOTIFY_DONE;
2879 }
2880
2881 static struct notifier_block rocker_switchdev_notifier = {
2882         .notifier_call = rocker_switchdev_event,
2883 };
2884
2885 static struct notifier_block rocker_switchdev_blocking_notifier = {
2886         .notifier_call = rocker_switchdev_blocking_event,
2887 };
2888
2889 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2890 {
2891         struct notifier_block *nb;
2892         struct rocker *rocker;
2893         int err;
2894
2895         rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2896         if (!rocker)
2897                 return -ENOMEM;
2898
2899         err = pci_enable_device(pdev);
2900         if (err) {
2901                 dev_err(&pdev->dev, "pci_enable_device failed\n");
2902                 goto err_pci_enable_device;
2903         }
2904
2905         err = pci_request_regions(pdev, rocker_driver_name);
2906         if (err) {
2907                 dev_err(&pdev->dev, "pci_request_regions failed\n");
2908                 goto err_pci_request_regions;
2909         }
2910
2911         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2912         if (!err) {
2913                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2914                 if (err) {
2915                         dev_err(&pdev->dev, "dma_set_coherent_mask failed\n");
2916                         goto err_pci_set_dma_mask;
2917                 }
2918         } else {
2919                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2920                 if (err) {
2921                         dev_err(&pdev->dev, "dma_set_mask failed\n");
2922                         goto err_pci_set_dma_mask;
2923                 }
2924         }
2925
2926         if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2927                 dev_err(&pdev->dev, "invalid PCI region size\n");
2928                 err = -EINVAL;
2929                 goto err_pci_resource_len_check;
2930         }
2931
2932         rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2933                                   pci_resource_len(pdev, 0));
2934         if (!rocker->hw_addr) {
2935                 dev_err(&pdev->dev, "ioremap failed\n");
2936                 err = -EIO;
2937                 goto err_ioremap;
2938         }
2939         pci_set_master(pdev);
2940
2941         rocker->pdev = pdev;
2942         pci_set_drvdata(pdev, rocker);
2943
2944         rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2945
2946         err = rocker_msix_init(rocker);
2947         if (err) {
2948                 dev_err(&pdev->dev, "MSI-X init failed\n");
2949                 goto err_msix_init;
2950         }
2951
2952         err = rocker_basic_hw_test(rocker);
2953         if (err) {
2954                 dev_err(&pdev->dev, "basic hw test failed\n");
2955                 goto err_basic_hw_test;
2956         }
2957
2958         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2959
2960         err = rocker_dma_rings_init(rocker);
2961         if (err)
2962                 goto err_dma_rings_init;
2963
2964         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2965                           rocker_cmd_irq_handler, 0,
2966                           rocker_driver_name, rocker);
2967         if (err) {
2968                 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2969                 goto err_request_cmd_irq;
2970         }
2971
2972         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2973                           rocker_event_irq_handler, 0,
2974                           rocker_driver_name, rocker);
2975         if (err) {
2976                 dev_err(&pdev->dev, "cannot assign event irq\n");
2977                 goto err_request_event_irq;
2978         }
2979
2980         rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2981                                                      WQ_MEM_RECLAIM);
2982         if (!rocker->rocker_owq) {
2983                 err = -ENOMEM;
2984                 goto err_alloc_ordered_workqueue;
2985         }
2986
2987         err = rocker_probe_ports(rocker);
2988         if (err) {
2989                 dev_err(&pdev->dev, "failed to probe ports\n");
2990                 goto err_probe_ports;
2991         }
2992
2993         /* Only FIBs pointing to our own netdevs are programmed into
2994          * the device, so no need to pass a callback.
2995          */
2996         rocker->fib_nb.notifier_call = rocker_router_fib_event;
2997         err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2998         if (err)
2999                 goto err_register_fib_notifier;
3000
3001         err = register_switchdev_notifier(&rocker_switchdev_notifier);
3002         if (err) {
3003                 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
3004                 goto err_register_switchdev_notifier;
3005         }
3006
3007         nb = &rocker_switchdev_blocking_notifier;
3008         err = register_switchdev_blocking_notifier(nb);
3009         if (err) {
3010                 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
3011                 goto err_register_switchdev_blocking_notifier;
3012         }
3013
3014         rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
3015
3016         dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
3017                  (int)sizeof(rocker->hw.id), &rocker->hw.id);
3018
3019         return 0;
3020
3021 err_register_switchdev_blocking_notifier:
3022         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3023 err_register_switchdev_notifier:
3024         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3025 err_register_fib_notifier:
3026         rocker_remove_ports(rocker);
3027 err_probe_ports:
3028         destroy_workqueue(rocker->rocker_owq);
3029 err_alloc_ordered_workqueue:
3030         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3031 err_request_event_irq:
3032         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3033 err_request_cmd_irq:
3034         rocker_dma_rings_fini(rocker);
3035 err_dma_rings_init:
3036 err_basic_hw_test:
3037         rocker_msix_fini(rocker);
3038 err_msix_init:
3039         iounmap(rocker->hw_addr);
3040 err_ioremap:
3041 err_pci_resource_len_check:
3042 err_pci_set_dma_mask:
3043         pci_release_regions(pdev);
3044 err_pci_request_regions:
3045         pci_disable_device(pdev);
3046 err_pci_enable_device:
3047         kfree(rocker);
3048         return err;
3049 }
3050
3051 static void rocker_remove(struct pci_dev *pdev)
3052 {
3053         struct rocker *rocker = pci_get_drvdata(pdev);
3054         struct notifier_block *nb;
3055
3056         nb = &rocker_switchdev_blocking_notifier;
3057         unregister_switchdev_blocking_notifier(nb);
3058
3059         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3060         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3061         rocker_remove_ports(rocker);
3062         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3063         destroy_workqueue(rocker->rocker_owq);
3064         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3065         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3066         rocker_dma_rings_fini(rocker);
3067         rocker_msix_fini(rocker);
3068         iounmap(rocker->hw_addr);
3069         pci_release_regions(rocker->pdev);
3070         pci_disable_device(rocker->pdev);
3071         kfree(rocker);
3072 }
3073
3074 static struct pci_driver rocker_pci_driver = {
3075         .name           = rocker_driver_name,
3076         .id_table       = rocker_pci_id_table,
3077         .probe          = rocker_probe,
3078         .remove         = rocker_remove,
3079 };
3080
3081 /************************************
3082  * Net device notifier event handler
3083  ************************************/
3084
3085 static bool rocker_port_dev_check_under(const struct net_device *dev,
3086                                         struct rocker *rocker)
3087 {
3088         struct rocker_port *rocker_port;
3089
3090         if (!rocker_port_dev_check(dev))
3091                 return false;
3092
3093         rocker_port = netdev_priv(dev);
3094         if (rocker_port->rocker != rocker)
3095                 return false;
3096
3097         return true;
3098 }
3099
3100 struct rocker_walk_data {
3101         struct rocker *rocker;
3102         struct rocker_port *port;
3103 };
3104
3105 static int rocker_lower_dev_walk(struct net_device *lower_dev,
3106                                  struct netdev_nested_priv *priv)
3107 {
3108         struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3109         int ret = 0;
3110
3111         if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3112                 data->port = netdev_priv(lower_dev);
3113                 ret = 1;
3114         }
3115
3116         return ret;
3117 }
3118
3119 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3120                                                struct rocker *rocker)
3121 {
3122         struct netdev_nested_priv priv;
3123         struct rocker_walk_data data;
3124
3125         if (rocker_port_dev_check_under(dev, rocker))
3126                 return netdev_priv(dev);
3127
3128         data.rocker = rocker;
3129         data.port = NULL;
3130         priv.data = (void *)&data;
3131         netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3132
3133         return data.port;
3134 }
3135
3136 static int rocker_netdevice_event(struct notifier_block *unused,
3137                                   unsigned long event, void *ptr)
3138 {
3139         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3140         struct netdev_notifier_changeupper_info *info;
3141         struct rocker_port *rocker_port;
3142         int err;
3143
3144         if (!rocker_port_dev_check(dev))
3145                 return NOTIFY_DONE;
3146
3147         switch (event) {
3148         case NETDEV_CHANGEUPPER:
3149                 info = ptr;
3150                 if (!info->master)
3151                         goto out;
3152                 rocker_port = netdev_priv(dev);
3153                 if (info->linking) {
3154                         err = rocker_world_port_master_linked(rocker_port,
3155                                                               info->upper_dev);
3156                         if (err)
3157                                 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3158                                             err);
3159                 } else {
3160                         err = rocker_world_port_master_unlinked(rocker_port,
3161                                                                 info->upper_dev);
3162                         if (err)
3163                                 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3164                                             err);
3165                 }
3166         }
3167 out:
3168         return NOTIFY_DONE;
3169 }
3170
3171 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3172         .notifier_call = rocker_netdevice_event,
3173 };
3174
3175 /************************************
3176  * Net event notifier event handler
3177  ************************************/
3178
3179 static int rocker_netevent_event(struct notifier_block *unused,
3180                                  unsigned long event, void *ptr)
3181 {
3182         struct rocker_port *rocker_port;
3183         struct net_device *dev;
3184         struct neighbour *n = ptr;
3185         int err;
3186
3187         switch (event) {
3188         case NETEVENT_NEIGH_UPDATE:
3189                 if (n->tbl != &arp_tbl)
3190                         return NOTIFY_DONE;
3191                 dev = n->dev;
3192                 if (!rocker_port_dev_check(dev))
3193                         return NOTIFY_DONE;
3194                 rocker_port = netdev_priv(dev);
3195                 err = rocker_world_port_neigh_update(rocker_port, n);
3196                 if (err)
3197                         netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3198                                     err);
3199                 break;
3200         }
3201
3202         return NOTIFY_DONE;
3203 }
3204
3205 static struct notifier_block rocker_netevent_nb __read_mostly = {
3206         .notifier_call = rocker_netevent_event,
3207 };
3208
3209 /***********************
3210  * Module init and exit
3211  ***********************/
3212
3213 static int __init rocker_module_init(void)
3214 {
3215         int err;
3216
3217         register_netdevice_notifier(&rocker_netdevice_nb);
3218         register_netevent_notifier(&rocker_netevent_nb);
3219         err = pci_register_driver(&rocker_pci_driver);
3220         if (err)
3221                 goto err_pci_register_driver;
3222         return 0;
3223
3224 err_pci_register_driver:
3225         unregister_netevent_notifier(&rocker_netevent_nb);
3226         unregister_netdevice_notifier(&rocker_netdevice_nb);
3227         return err;
3228 }
3229
3230 static void __exit rocker_module_exit(void)
3231 {
3232         unregister_netevent_notifier(&rocker_netevent_nb);
3233         unregister_netdevice_notifier(&rocker_netdevice_nb);
3234         pci_unregister_driver(&rocker_pci_driver);
3235 }
3236
3237 module_init(rocker_module_init);
3238 module_exit(rocker_module_exit);
3239
3240 MODULE_LICENSE("GPL v2");
3241 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3242 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3243 MODULE_DESCRIPTION("Rocker switch device driver");
3244 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);