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 <[email protected]>
   5  * Copyright (c) 2014 Scott Feldman <[email protected]>
   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 = pci_map_single(pdev, buf, ROCKER_TEST_DMA_BUF_SIZE,
 204                                     PCI_DMA_BIDIRECTIONAL);
 205         if (pci_dma_mapping_error(pdev, 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         pci_unmap_single(pdev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
 238                          PCI_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 = pci_alloc_consistent(rocker->pdev,
 445                                           info->size * sizeof(*info->desc),
 446                                           &info->mapaddr);
 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         pci_free_consistent(rocker->pdev,
 469                             info->size * sizeof(struct rocker_desc),
 470                             info->desc, 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 = pci_map_single(pdev, buf, buf_size, direction);
 510                 if (pci_dma_mapping_error(pdev, dma_handle)) {
 511                         kfree(buf);
 512                         err = -EIO;
 513                         goto rollback;
 514                 }
 515
 516                 desc_info->data = buf;
 517                 desc_info->data_size = buf_size;
 518                 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
 519
 520                 desc->buf_addr = dma_handle;
 521                 desc->buf_size = buf_size;
 522         }
 523         return 0;
 524
 525 rollback:
 526         for (i--; i >= 0; i--) {
 527                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 528
 529                 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
 530                                  desc_info->data_size, direction);
 531                 kfree(desc_info->data);
 532         }
 533         return err;
 534 }
 535
 536 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
 537                                       const struct rocker_dma_ring_info *info,
 538                                       int direction)
 539 {
 540         struct pci_dev *pdev = rocker->pdev;
 541         int i;
 542
 543         for (i = 0; i < info->size; i++) {
 544                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 545                 struct rocker_desc *desc = &info->desc[i];
 546
 547                 desc->buf_addr = 0;
 548                 desc->buf_size = 0;
 549                 pci_unmap_single(pdev, dma_unmap_addr(desc_info, mapaddr),
 550                                  desc_info->data_size, direction);
 551                 kfree(desc_info->data);
 552         }
 553 }
 554
 555 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
 556 {
 557         struct rocker_wait *wait;
 558
 559         wait = rocker_wait_create();
 560         if (!wait)
 561                 return -ENOMEM;
 562         rocker_desc_cookie_ptr_set(desc_info, wait);
 563         return 0;
 564 }
 565
 566 static void
 567 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
 568 {
 569         struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
 570
 571         rocker_wait_destroy(wait);
 572 }
 573
 574 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
 575 {
 576         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 577         int i;
 578         int err;
 579
 580         for (i = 0; i < cmd_ring->size; i++) {
 581                 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
 582                 if (err)
 583                         goto rollback;
 584         }
 585         return 0;
 586
 587 rollback:
 588         for (i--; i >= 0; i--)
 589                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 590         return err;
 591 }
 592
 593 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
 594 {
 595         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 596         int i;
 597
 598         for (i = 0; i < cmd_ring->size; i++)
 599                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 600 }
 601
 602 static int rocker_dma_rings_init(struct rocker *rocker)
 603 {
 604         const struct pci_dev *pdev = rocker->pdev;
 605         int err;
 606
 607         err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
 608                                      ROCKER_DMA_CMD_DEFAULT_SIZE,
 609                                      &rocker->cmd_ring);
 610         if (err) {
 611                 dev_err(&pdev->dev, "failed to create command dma ring\n");
 612                 return err;
 613         }
 614
 615         spin_lock_init(&rocker->cmd_ring_lock);
 616
 617         err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
 618                                          PCI_DMA_BIDIRECTIONAL, PAGE_SIZE);
 619         if (err) {
 620                 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
 621                 goto err_dma_cmd_ring_bufs_alloc;
 622         }
 623
 624         err = rocker_dma_cmd_ring_waits_alloc(rocker);
 625         if (err) {
 626                 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
 627                 goto err_dma_cmd_ring_waits_alloc;
 628         }
 629
 630         err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
 631                                      ROCKER_DMA_EVENT_DEFAULT_SIZE,
 632                                      &rocker->event_ring);
 633         if (err) {
 634                 dev_err(&pdev->dev, "failed to create event dma ring\n");
 635                 goto err_dma_event_ring_create;
 636         }
 637
 638         err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
 639                                          PCI_DMA_FROMDEVICE, PAGE_SIZE);
 640         if (err) {
 641                 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
 642                 goto err_dma_event_ring_bufs_alloc;
 643         }
 644         rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
 645         return 0;
 646
 647 err_dma_event_ring_bufs_alloc:
 648         rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 649 err_dma_event_ring_create:
 650         rocker_dma_cmd_ring_waits_free(rocker);
 651 err_dma_cmd_ring_waits_alloc:
 652         rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
 653                                   PCI_DMA_BIDIRECTIONAL);
 654 err_dma_cmd_ring_bufs_alloc:
 655         rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 656         return err;
 657 }
 658
 659 static void rocker_dma_rings_fini(struct rocker *rocker)
 660 {
 661         rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
 662                                   PCI_DMA_BIDIRECTIONAL);
 663         rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 664         rocker_dma_cmd_ring_waits_free(rocker);
 665         rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
 666                                   PCI_DMA_BIDIRECTIONAL);
 667         rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 668 }
 669
 670 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
 671                                       struct rocker_desc_info *desc_info,
 672                                       struct sk_buff *skb, size_t buf_len)
 673 {
 674         const struct rocker *rocker = rocker_port->rocker;
 675         struct pci_dev *pdev = rocker->pdev;
 676         dma_addr_t dma_handle;
 677
 678         dma_handle = pci_map_single(pdev, skb->data, buf_len,
 679                                     PCI_DMA_FROMDEVICE);
 680         if (pci_dma_mapping_error(pdev, dma_handle))
 681                 return -EIO;
 682         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
 683                 goto tlv_put_failure;
 684         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
 685                 goto tlv_put_failure;
 686         return 0;
 687
 688 tlv_put_failure:
 689         pci_unmap_single(pdev, dma_handle, buf_len, PCI_DMA_FROMDEVICE);
 690         desc_info->tlv_size = 0;
 691         return -EMSGSIZE;
 692 }
 693
 694 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
 695 {
 696         return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 697 }
 698
 699 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
 700                                         struct rocker_desc_info *desc_info)
 701 {
 702         struct net_device *dev = rocker_port->dev;
 703         struct sk_buff *skb;
 704         size_t buf_len = rocker_port_rx_buf_len(rocker_port);
 705         int err;
 706
 707         /* Ensure that hw will see tlv_size zero in case of an error.
 708          * That tells hw to use another descriptor.
 709          */
 710         rocker_desc_cookie_ptr_set(desc_info, NULL);
 711         desc_info->tlv_size = 0;
 712
 713         skb = netdev_alloc_skb_ip_align(dev, buf_len);
 714         if (!skb)
 715                 return -ENOMEM;
 716         err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
 717         if (err) {
 718                 dev_kfree_skb_any(skb);
 719                 return err;
 720         }
 721         rocker_desc_cookie_ptr_set(desc_info, skb);
 722         return 0;
 723 }
 724
 725 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
 726                                          const struct rocker_tlv **attrs)
 727 {
 728         struct pci_dev *pdev = rocker->pdev;
 729         dma_addr_t dma_handle;
 730         size_t len;
 731
 732         if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
 733             !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
 734                 return;
 735         dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
 736         len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
 737         pci_unmap_single(pdev, dma_handle, len, PCI_DMA_FROMDEVICE);
 738 }
 739
 740 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
 741                                         const struct rocker_desc_info *desc_info)
 742 {
 743         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
 744         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
 745
 746         if (!skb)
 747                 return;
 748         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
 749         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
 750         dev_kfree_skb_any(skb);
 751 }
 752
 753 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
 754 {
 755         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 756         const struct rocker *rocker = rocker_port->rocker;
 757         int i;
 758         int err;
 759
 760         for (i = 0; i < rx_ring->size; i++) {
 761                 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
 762                                                    &rx_ring->desc_info[i]);
 763                 if (err)
 764                         goto rollback;
 765         }
 766         return 0;
 767
 768 rollback:
 769         for (i--; i >= 0; i--)
 770                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 771         return err;
 772 }
 773
 774 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
 775 {
 776         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 777         const struct rocker *rocker = rocker_port->rocker;
 778         int i;
 779
 780         for (i = 0; i < rx_ring->size; i++)
 781                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 782 }
 783
 784 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
 785 {
 786         struct rocker *rocker = rocker_port->rocker;
 787         int err;
 788
 789         err = rocker_dma_ring_create(rocker,
 790                                      ROCKER_DMA_TX(rocker_port->port_number),
 791                                      ROCKER_DMA_TX_DEFAULT_SIZE,
 792                                      &rocker_port->tx_ring);
 793         if (err) {
 794                 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
 795                 return err;
 796         }
 797
 798         err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
 799                                          PCI_DMA_TODEVICE,
 800                                          ROCKER_DMA_TX_DESC_SIZE);
 801         if (err) {
 802                 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
 803                 goto err_dma_tx_ring_bufs_alloc;
 804         }
 805
 806         err = rocker_dma_ring_create(rocker,
 807                                      ROCKER_DMA_RX(rocker_port->port_number),
 808                                      ROCKER_DMA_RX_DEFAULT_SIZE,
 809                                      &rocker_port->rx_ring);
 810         if (err) {
 811                 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
 812                 goto err_dma_rx_ring_create;
 813         }
 814
 815         err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
 816                                          PCI_DMA_BIDIRECTIONAL,
 817                                          ROCKER_DMA_RX_DESC_SIZE);
 818         if (err) {
 819                 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
 820                 goto err_dma_rx_ring_bufs_alloc;
 821         }
 822
 823         err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
 824         if (err) {
 825                 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
 826                 goto err_dma_rx_ring_skbs_alloc;
 827         }
 828         rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
 829
 830         return 0;
 831
 832 err_dma_rx_ring_skbs_alloc:
 833         rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
 834                                   PCI_DMA_BIDIRECTIONAL);
 835 err_dma_rx_ring_bufs_alloc:
 836         rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 837 err_dma_rx_ring_create:
 838         rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
 839                                   PCI_DMA_TODEVICE);
 840 err_dma_tx_ring_bufs_alloc:
 841         rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 842         return err;
 843 }
 844
 845 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
 846 {
 847         struct rocker *rocker = rocker_port->rocker;
 848
 849         rocker_dma_rx_ring_skbs_free(rocker_port);
 850         rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
 851                                   PCI_DMA_BIDIRECTIONAL);
 852         rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 853         rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
 854                                   PCI_DMA_TODEVICE);
 855         rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 856 }
 857
 858 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
 859                                    bool enable)
 860 {
 861         u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
 862
 863         if (enable)
 864                 val |= 1ULL << rocker_port->pport;
 865         else
 866                 val &= ~(1ULL << rocker_port->pport);
 867         rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
 868 }
 869
 870 /********************************
 871  * Interrupt handler and helpers
 872  ********************************/
 873
 874 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
 875 {
 876         struct rocker *rocker = dev_id;
 877         const struct rocker_desc_info *desc_info;
 878         struct rocker_wait *wait;
 879         u32 credits = 0;
 880
 881         spin_lock(&rocker->cmd_ring_lock);
 882         while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
 883                 wait = rocker_desc_cookie_ptr_get(desc_info);
 884                 if (wait->nowait) {
 885                         rocker_desc_gen_clear(desc_info);
 886                 } else {
 887                         rocker_wait_wake_up(wait);
 888                 }
 889                 credits++;
 890         }
 891         spin_unlock(&rocker->cmd_ring_lock);
 892         rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
 893
 894         return IRQ_HANDLED;
 895 }
 896
 897 static void rocker_port_link_up(const struct rocker_port *rocker_port)
 898 {
 899         netif_carrier_on(rocker_port->dev);
 900         netdev_info(rocker_port->dev, "Link is up\n");
 901 }
 902
 903 static void rocker_port_link_down(const struct rocker_port *rocker_port)
 904 {
 905         netif_carrier_off(rocker_port->dev);
 906         netdev_info(rocker_port->dev, "Link is down\n");
 907 }
 908
 909 static int rocker_event_link_change(const struct rocker *rocker,
 910                                     const struct rocker_tlv *info)
 911 {
 912         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
 913         unsigned int port_number;
 914         bool link_up;
 915         struct rocker_port *rocker_port;
 916
 917         rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
 918         if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
 919             !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
 920                 return -EIO;
 921         port_number =
 922                 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
 923         link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
 924
 925         if (port_number >= rocker->port_count)
 926                 return -EINVAL;
 927
 928         rocker_port = rocker->ports[port_number];
 929         if (netif_carrier_ok(rocker_port->dev) != link_up) {
 930                 if (link_up)
 931                         rocker_port_link_up(rocker_port);
 932                 else
 933                         rocker_port_link_down(rocker_port);
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
 940                                               const unsigned char *addr,
 941                                               __be16 vlan_id);
 942
 943 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
 944                                       const struct rocker_tlv *info)
 945 {
 946         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
 947         unsigned int port_number;
 948         struct rocker_port *rocker_port;
 949         const unsigned char *addr;
 950         __be16 vlan_id;
 951
 952         rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
 953         if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
 954             !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
 955             !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
 956                 return -EIO;
 957         port_number =
 958                 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
 959         addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
 960         vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
 961
 962         if (port_number >= rocker->port_count)
 963                 return -EINVAL;
 964
 965         rocker_port = rocker->ports[port_number];
 966         return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
 967 }
 968
 969 static int rocker_event_process(const struct rocker *rocker,
 970                                 const struct rocker_desc_info *desc_info)
 971 {
 972         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
 973         const struct rocker_tlv *info;
 974         u16 type;
 975
 976         rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
 977         if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
 978             !attrs[ROCKER_TLV_EVENT_INFO])
 979                 return -EIO;
 980
 981         type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
 982         info = attrs[ROCKER_TLV_EVENT_INFO];
 983
 984         switch (type) {
 985         case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
 986                 return rocker_event_link_change(rocker, info);
 987         case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
 988                 return rocker_event_mac_vlan_seen(rocker, info);
 989         }
 990
 991         return -EOPNOTSUPP;
 992 }
 993
 994 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
 995 {
 996         struct rocker *rocker = dev_id;
 997         const struct pci_dev *pdev = rocker->pdev;
 998         const struct rocker_desc_info *desc_info;
 999         u32 credits = 0;
1000         int err;
1001
1002         while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1003                 err = rocker_desc_err(desc_info);
1004                 if (err) {
1005                         dev_err(&pdev->dev, "event desc received with err %d\n",
1006                                 err);
1007                 } else {
1008                         err = rocker_event_process(rocker, desc_info);
1009                         if (err)
1010                                 dev_err(&pdev->dev, "event processing failed with err %d\n",
1011                                         err);
1012                 }
1013                 rocker_desc_gen_clear(desc_info);
1014                 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1015                 credits++;
1016         }
1017         rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1018
1019         return IRQ_HANDLED;
1020 }
1021
1022 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1023 {
1024         struct rocker_port *rocker_port = dev_id;
1025
1026         napi_schedule(&rocker_port->napi_tx);
1027         return IRQ_HANDLED;
1028 }
1029
1030 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1031 {
1032         struct rocker_port *rocker_port = dev_id;
1033
1034         napi_schedule(&rocker_port->napi_rx);
1035         return IRQ_HANDLED;
1036 }
1037
1038 /********************
1039  * Command interface
1040  ********************/
1041
1042 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1043                     rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1044                     rocker_cmd_proc_cb_t process, void *process_priv)
1045 {
1046         struct rocker *rocker = rocker_port->rocker;
1047         struct rocker_desc_info *desc_info;
1048         struct rocker_wait *wait;
1049         unsigned long lock_flags;
1050         int err;
1051
1052         spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1053
1054         desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1055         if (!desc_info) {
1056                 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1057                 return -EAGAIN;
1058         }
1059
1060         wait = rocker_desc_cookie_ptr_get(desc_info);
1061         rocker_wait_init(wait);
1062         wait->nowait = nowait;
1063
1064         err = prepare(rocker_port, desc_info, prepare_priv);
1065         if (err) {
1066                 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1067                 return err;
1068         }
1069
1070         rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1071
1072         spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1073
1074         if (nowait)
1075                 return 0;
1076
1077         if (!rocker_wait_event_timeout(wait, HZ / 10))
1078                 return -EIO;
1079
1080         err = rocker_desc_err(desc_info);
1081         if (err)
1082                 return err;
1083
1084         if (process)
1085                 err = process(rocker_port, desc_info, process_priv);
1086
1087         rocker_desc_gen_clear(desc_info);
1088         return err;
1089 }
1090
1091 static int
1092 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1093                                   struct rocker_desc_info *desc_info,
1094                                   void *priv)
1095 {
1096         struct rocker_tlv *cmd_info;
1097
1098         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1099                                ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1100                 return -EMSGSIZE;
1101         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1102         if (!cmd_info)
1103                 return -EMSGSIZE;
1104         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1105                                rocker_port->pport))
1106                 return -EMSGSIZE;
1107         rocker_tlv_nest_end(desc_info, cmd_info);
1108         return 0;
1109 }
1110
1111 static int
1112 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1113                                           const struct rocker_desc_info *desc_info,
1114                                           void *priv)
1115 {
1116         struct ethtool_link_ksettings *ecmd = priv;
1117         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1118         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1119         u32 speed;
1120         u8 duplex;
1121         u8 autoneg;
1122
1123         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1124         if (!attrs[ROCKER_TLV_CMD_INFO])
1125                 return -EIO;
1126
1127         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1128                                 attrs[ROCKER_TLV_CMD_INFO]);
1129         if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1130             !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1131             !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1132                 return -EIO;
1133
1134         speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1135         duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1136         autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1137
1138         ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1139         ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1140
1141         ecmd->base.phy_address = 0xff;
1142         ecmd->base.port = PORT_TP;
1143         ecmd->base.speed = speed;
1144         ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1145         ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1146
1147         return 0;
1148 }
1149
1150 static int
1151 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1152                                           const struct rocker_desc_info *desc_info,
1153                                           void *priv)
1154 {
1155         unsigned char *macaddr = priv;
1156         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1157         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1158         const struct rocker_tlv *attr;
1159
1160         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1161         if (!attrs[ROCKER_TLV_CMD_INFO])
1162                 return -EIO;
1163
1164         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1165                                 attrs[ROCKER_TLV_CMD_INFO]);
1166         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1167         if (!attr)
1168                 return -EIO;
1169
1170         if (rocker_tlv_len(attr) != ETH_ALEN)
1171                 return -EINVAL;
1172
1173         ether_addr_copy(macaddr, rocker_tlv_data(attr));
1174         return 0;
1175 }
1176
1177 static int
1178 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1179                                        const struct rocker_desc_info *desc_info,
1180                                        void *priv)
1181 {
1182         u8 *p_mode = priv;
1183         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1184         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1185         const struct rocker_tlv *attr;
1186
1187         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1188         if (!attrs[ROCKER_TLV_CMD_INFO])
1189                 return -EIO;
1190
1191         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1192                                 attrs[ROCKER_TLV_CMD_INFO]);
1193         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1194         if (!attr)
1195                 return -EIO;
1196
1197         *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1198         return 0;
1199 }
1200
1201 struct port_name {
1202         char *buf;
1203         size_t len;
1204 };
1205
1206 static int
1207 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1208                                             const struct rocker_desc_info *desc_info,
1209                                             void *priv)
1210 {
1211         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1212         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1213         struct port_name *name = priv;
1214         const struct rocker_tlv *attr;
1215         size_t i, j, len;
1216         const char *str;
1217
1218         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1219         if (!attrs[ROCKER_TLV_CMD_INFO])
1220                 return -EIO;
1221
1222         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1223                                 attrs[ROCKER_TLV_CMD_INFO]);
1224         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1225         if (!attr)
1226                 return -EIO;
1227
1228         len = min_t(size_t, rocker_tlv_len(attr), name->len);
1229         str = rocker_tlv_data(attr);
1230
1231         /* make sure name only contains alphanumeric characters */
1232         for (i = j = 0; i < len; ++i) {
1233                 if (isalnum(str[i])) {
1234                         name->buf[j] = str[i];
1235                         j++;
1236                 }
1237         }
1238
1239         if (j == 0)
1240                 return -EIO;
1241
1242         name->buf[j] = '\0';
1243
1244         return 0;
1245 }
1246
1247 static int
1248 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1249                                           struct rocker_desc_info *desc_info,
1250                                           void *priv)
1251 {
1252         struct ethtool_link_ksettings *ecmd = priv;
1253         struct rocker_tlv *cmd_info;
1254
1255         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1256                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1257                 return -EMSGSIZE;
1258         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1259         if (!cmd_info)
1260                 return -EMSGSIZE;
1261         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1262                                rocker_port->pport))
1263                 return -EMSGSIZE;
1264         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1265                                ecmd->base.speed))
1266                 return -EMSGSIZE;
1267         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1268                               ecmd->base.duplex))
1269                 return -EMSGSIZE;
1270         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1271                               ecmd->base.autoneg))
1272                 return -EMSGSIZE;
1273         rocker_tlv_nest_end(desc_info, cmd_info);
1274         return 0;
1275 }
1276
1277 static int
1278 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1279                                           struct rocker_desc_info *desc_info,
1280                                           void *priv)
1281 {
1282         const unsigned char *macaddr = priv;
1283         struct rocker_tlv *cmd_info;
1284
1285         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1286                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1287                 return -EMSGSIZE;
1288         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1289         if (!cmd_info)
1290                 return -EMSGSIZE;
1291         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1292                                rocker_port->pport))
1293                 return -EMSGSIZE;
1294         if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1295                            ETH_ALEN, macaddr))
1296                 return -EMSGSIZE;
1297         rocker_tlv_nest_end(desc_info, cmd_info);
1298         return 0;
1299 }
1300
1301 static int
1302 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1303                                       struct rocker_desc_info *desc_info,
1304                                       void *priv)
1305 {
1306         int mtu = *(int *)priv;
1307         struct rocker_tlv *cmd_info;
1308
1309         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1310                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1311                 return -EMSGSIZE;
1312         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1313         if (!cmd_info)
1314                 return -EMSGSIZE;
1315         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1316                                rocker_port->pport))
1317                 return -EMSGSIZE;
1318         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1319                                mtu))
1320                 return -EMSGSIZE;
1321         rocker_tlv_nest_end(desc_info, cmd_info);
1322         return 0;
1323 }
1324
1325 static int
1326 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1327                                   struct rocker_desc_info *desc_info,
1328                                   void *priv)
1329 {
1330         bool learning = *(bool *)priv;
1331         struct rocker_tlv *cmd_info;
1332
1333         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1334                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1335                 return -EMSGSIZE;
1336         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1337         if (!cmd_info)
1338                 return -EMSGSIZE;
1339         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1340                                rocker_port->pport))
1341                 return -EMSGSIZE;
1342         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1343                               learning))
1344                 return -EMSGSIZE;
1345         rocker_tlv_nest_end(desc_info, cmd_info);
1346         return 0;
1347 }
1348
1349 static int
1350 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1351                                      struct ethtool_link_ksettings *ecmd)
1352 {
1353         return rocker_cmd_exec(rocker_port, false,
1354                                rocker_cmd_get_port_settings_prep, NULL,
1355                                rocker_cmd_get_port_settings_ethtool_proc,
1356                                ecmd);
1357 }
1358
1359 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1360                                                 unsigned char *macaddr)
1361 {
1362         return rocker_cmd_exec(rocker_port, false,
1363                                rocker_cmd_get_port_settings_prep, NULL,
1364                                rocker_cmd_get_port_settings_macaddr_proc,
1365                                macaddr);
1366 }
1367
1368 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1369                                              u8 *p_mode)
1370 {
1371         return rocker_cmd_exec(rocker_port, false,
1372                                rocker_cmd_get_port_settings_prep, NULL,
1373                                rocker_cmd_get_port_settings_mode_proc, p_mode);
1374 }
1375
1376 static int
1377 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1378                                      const struct ethtool_link_ksettings *ecmd)
1379 {
1380         struct ethtool_link_ksettings copy_ecmd;
1381
1382         memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1383
1384         return rocker_cmd_exec(rocker_port, false,
1385                                rocker_cmd_set_port_settings_ethtool_prep,
1386                                &copy_ecmd, NULL, NULL);
1387 }
1388
1389 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1390                                                 unsigned char *macaddr)
1391 {
1392         return rocker_cmd_exec(rocker_port, false,
1393                                rocker_cmd_set_port_settings_macaddr_prep,
1394                                macaddr, NULL, NULL);
1395 }
1396
1397 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1398                                             int mtu)
1399 {
1400         return rocker_cmd_exec(rocker_port, false,
1401                                rocker_cmd_set_port_settings_mtu_prep,
1402                                &mtu, NULL, NULL);
1403 }
1404
1405 int rocker_port_set_learning(struct rocker_port *rocker_port,
1406                              bool learning)
1407 {
1408         return rocker_cmd_exec(rocker_port, false,
1409                                rocker_cmd_set_port_learning_prep,
1410                                &learning, NULL, NULL);
1411 }
1412
1413 /**********************
1414  * Worlds manipulation
1415  **********************/
1416
1417 static struct rocker_world_ops *rocker_world_ops[] = {
1418         &rocker_ofdpa_ops,
1419 };
1420
1421 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1422
1423 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1424 {
1425         int i;
1426
1427         for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1428                 if (rocker_world_ops[i]->mode == mode)
1429                         return rocker_world_ops[i];
1430         return NULL;
1431 }
1432
1433 static int rocker_world_init(struct rocker *rocker, u8 mode)
1434 {
1435         struct rocker_world_ops *wops;
1436         int err;
1437
1438         wops = rocker_world_ops_find(mode);
1439         if (!wops) {
1440                 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1441                         mode);
1442                 return -EINVAL;
1443         }
1444         rocker->wops = wops;
1445         rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1446         if (!rocker->wpriv)
1447                 return -ENOMEM;
1448         if (!wops->init)
1449                 return 0;
1450         err = wops->init(rocker);
1451         if (err)
1452                 kfree(rocker->wpriv);
1453         return err;
1454 }
1455
1456 static void rocker_world_fini(struct rocker *rocker)
1457 {
1458         struct rocker_world_ops *wops = rocker->wops;
1459
1460         if (!wops || !wops->fini)
1461                 return;
1462         wops->fini(rocker);
1463         kfree(rocker->wpriv);
1464 }
1465
1466 static int rocker_world_check_init(struct rocker_port *rocker_port)
1467 {
1468         struct rocker *rocker = rocker_port->rocker;
1469         u8 mode;
1470         int err;
1471
1472         err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1473         if (err) {
1474                 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1475                 return err;
1476         }
1477         if (rocker->wops) {
1478                 if (rocker->wops->mode != mode) {
1479                         dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1480                         return -EINVAL;
1481                 }
1482                 return 0;
1483         }
1484         return rocker_world_init(rocker, mode);
1485 }
1486
1487 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1488 {
1489         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1490         int err;
1491
1492         rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1493         if (!rocker_port->wpriv)
1494                 return -ENOMEM;
1495         if (!wops->port_pre_init)
1496                 return 0;
1497         err = wops->port_pre_init(rocker_port);
1498         if (err)
1499                 kfree(rocker_port->wpriv);
1500         return 0;
1501 }
1502
1503 static int rocker_world_port_init(struct rocker_port *rocker_port)
1504 {
1505         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1506
1507         if (!wops->port_init)
1508                 return 0;
1509         return wops->port_init(rocker_port);
1510 }
1511
1512 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1513 {
1514         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1515
1516         if (!wops->port_fini)
1517                 return;
1518         wops->port_fini(rocker_port);
1519 }
1520
1521 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1522 {
1523         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1524
1525         if (!wops->port_post_fini)
1526                 return;
1527         wops->port_post_fini(rocker_port);
1528         kfree(rocker_port->wpriv);
1529 }
1530
1531 static int rocker_world_port_open(struct rocker_port *rocker_port)
1532 {
1533         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1534
1535         if (!wops->port_open)
1536                 return 0;
1537         return wops->port_open(rocker_port);
1538 }
1539
1540 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1541 {
1542         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1543
1544         if (!wops->port_stop)
1545                 return;
1546         wops->port_stop(rocker_port);
1547 }
1548
1549 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1550                                                 u8 state,
1551                                                 struct switchdev_trans *trans)
1552 {
1553         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1554
1555         if (!wops->port_attr_stp_state_set)
1556                 return -EOPNOTSUPP;
1557
1558         if (switchdev_trans_ph_prepare(trans))
1559                 return 0;
1560
1561         return wops->port_attr_stp_state_set(rocker_port, state);
1562 }
1563
1564 static int
1565 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1566                                                 rocker_port,
1567                                                 unsigned long *
1568                                                 p_brport_flags_support)
1569 {
1570         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1571
1572         if (!wops->port_attr_bridge_flags_support_get)
1573                 return -EOPNOTSUPP;
1574         return wops->port_attr_bridge_flags_support_get(rocker_port,
1575                                                         p_brport_flags_support);
1576 }
1577
1578 static int
1579 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1580                                             unsigned long brport_flags,
1581                                             struct switchdev_trans *trans)
1582 {
1583         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1584         unsigned long brport_flags_s;
1585         int err;
1586
1587         if (!wops->port_attr_bridge_flags_set)
1588                 return -EOPNOTSUPP;
1589
1590         err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1591                                                               &brport_flags_s);
1592         if (err)
1593                 return err;
1594
1595         if (brport_flags & ~brport_flags_s)
1596                 return -EINVAL;
1597
1598         return 0;
1599 }
1600
1601 static int
1602 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1603                                         unsigned long brport_flags,
1604                                         struct switchdev_trans *trans)
1605 {
1606         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1607
1608         if (!wops->port_attr_bridge_flags_set)
1609                 return -EOPNOTSUPP;
1610
1611         if (switchdev_trans_ph_prepare(trans))
1612                 return 0;
1613
1614         return wops->port_attr_bridge_flags_set(rocker_port, brport_flags,
1615                                                 trans);
1616 }
1617
1618 static int
1619 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1620                                               u32 ageing_time,
1621                                               struct switchdev_trans *trans)
1622
1623 {
1624         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1625
1626         if (!wops->port_attr_bridge_ageing_time_set)
1627                 return -EOPNOTSUPP;
1628
1629         if (switchdev_trans_ph_prepare(trans))
1630                 return 0;
1631
1632         return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time,
1633                                                       trans);
1634 }
1635
1636 static int
1637 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1638                                const struct switchdev_obj_port_vlan *vlan,
1639                                struct switchdev_trans *trans)
1640 {
1641         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1642
1643         if (!wops->port_obj_vlan_add)
1644                 return -EOPNOTSUPP;
1645
1646         if (switchdev_trans_ph_prepare(trans))
1647                 return 0;
1648
1649         return wops->port_obj_vlan_add(rocker_port, vlan);
1650 }
1651
1652 static int
1653 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1654                                const struct switchdev_obj_port_vlan *vlan)
1655 {
1656         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1657
1658         if (netif_is_bridge_master(vlan->obj.orig_dev))
1659                 return -EOPNOTSUPP;
1660
1661         if (!wops->port_obj_vlan_del)
1662                 return -EOPNOTSUPP;
1663         return wops->port_obj_vlan_del(rocker_port, vlan);
1664 }
1665
1666 static int
1667 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1668                           struct switchdev_notifier_fdb_info *info)
1669 {
1670         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1671
1672         if (!wops->port_obj_fdb_add)
1673                 return -EOPNOTSUPP;
1674
1675         return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1676 }
1677
1678 static int
1679 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1680                           struct switchdev_notifier_fdb_info *info)
1681 {
1682         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1683
1684         if (!wops->port_obj_fdb_del)
1685                 return -EOPNOTSUPP;
1686         return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1687 }
1688
1689 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1690                                            struct net_device *master)
1691 {
1692         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1693
1694         if (!wops->port_master_linked)
1695                 return -EOPNOTSUPP;
1696         return wops->port_master_linked(rocker_port, master);
1697 }
1698
1699 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1700                                              struct net_device *master)
1701 {
1702         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1703
1704         if (!wops->port_master_unlinked)
1705                 return -EOPNOTSUPP;
1706         return wops->port_master_unlinked(rocker_port, master);
1707 }
1708
1709 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1710                                           struct neighbour *n)
1711 {
1712         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1713
1714         if (!wops->port_neigh_update)
1715                 return -EOPNOTSUPP;
1716         return wops->port_neigh_update(rocker_port, n);
1717 }
1718
1719 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1720                                            struct neighbour *n)
1721 {
1722         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1723
1724         if (!wops->port_neigh_destroy)
1725                 return -EOPNOTSUPP;
1726         return wops->port_neigh_destroy(rocker_port, n);
1727 }
1728
1729 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1730                                               const unsigned char *addr,
1731                                               __be16 vlan_id)
1732 {
1733         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1734
1735         if (!wops->port_ev_mac_vlan_seen)
1736                 return -EOPNOTSUPP;
1737         return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1738 }
1739
1740 static int rocker_world_fib4_add(struct rocker *rocker,
1741                                  const struct fib_entry_notifier_info *fen_info)
1742 {
1743         struct rocker_world_ops *wops = rocker->wops;
1744
1745         if (!wops->fib4_add)
1746                 return 0;
1747         return wops->fib4_add(rocker, fen_info);
1748 }
1749
1750 static int rocker_world_fib4_del(struct rocker *rocker,
1751                                  const struct fib_entry_notifier_info *fen_info)
1752 {
1753         struct rocker_world_ops *wops = rocker->wops;
1754
1755         if (!wops->fib4_del)
1756                 return 0;
1757         return wops->fib4_del(rocker, fen_info);
1758 }
1759
1760 static void rocker_world_fib4_abort(struct rocker *rocker)
1761 {
1762         struct rocker_world_ops *wops = rocker->wops;
1763
1764         if (wops->fib4_abort)
1765                 wops->fib4_abort(rocker);
1766 }
1767
1768 /*****************
1769  * Net device ops
1770  *****************/
1771
1772 static int rocker_port_open(struct net_device *dev)
1773 {
1774         struct rocker_port *rocker_port = netdev_priv(dev);
1775         int err;
1776
1777         err = rocker_port_dma_rings_init(rocker_port);
1778         if (err)
1779                 return err;
1780
1781         err = request_irq(rocker_msix_tx_vector(rocker_port),
1782                           rocker_tx_irq_handler, 0,
1783                           rocker_driver_name, rocker_port);
1784         if (err) {
1785                 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1786                 goto err_request_tx_irq;
1787         }
1788
1789         err = request_irq(rocker_msix_rx_vector(rocker_port),
1790                           rocker_rx_irq_handler, 0,
1791                           rocker_driver_name, rocker_port);
1792         if (err) {
1793                 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1794                 goto err_request_rx_irq;
1795         }
1796
1797         err = rocker_world_port_open(rocker_port);
1798         if (err) {
1799                 netdev_err(rocker_port->dev, "cannot open port in world\n");
1800                 goto err_world_port_open;
1801         }
1802
1803         napi_enable(&rocker_port->napi_tx);
1804         napi_enable(&rocker_port->napi_rx);
1805         if (!dev->proto_down)
1806                 rocker_port_set_enable(rocker_port, true);
1807         netif_start_queue(dev);
1808         return 0;
1809
1810 err_world_port_open:
1811         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1812 err_request_rx_irq:
1813         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1814 err_request_tx_irq:
1815         rocker_port_dma_rings_fini(rocker_port);
1816         return err;
1817 }
1818
1819 static int rocker_port_stop(struct net_device *dev)
1820 {
1821         struct rocker_port *rocker_port = netdev_priv(dev);
1822
1823         netif_stop_queue(dev);
1824         rocker_port_set_enable(rocker_port, false);
1825         napi_disable(&rocker_port->napi_rx);
1826         napi_disable(&rocker_port->napi_tx);
1827         rocker_world_port_stop(rocker_port);
1828         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1829         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1830         rocker_port_dma_rings_fini(rocker_port);
1831
1832         return 0;
1833 }
1834
1835 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1836                                        const struct rocker_desc_info *desc_info)
1837 {
1838         const struct rocker *rocker = rocker_port->rocker;
1839         struct pci_dev *pdev = rocker->pdev;
1840         const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1841         struct rocker_tlv *attr;
1842         int rem;
1843
1844         rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1845         if (!attrs[ROCKER_TLV_TX_FRAGS])
1846                 return;
1847         rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1848                 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1849                 dma_addr_t dma_handle;
1850                 size_t len;
1851
1852                 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1853                         continue;
1854                 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1855                                         attr);
1856                 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1857                     !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1858                         continue;
1859                 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1860                 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1861                 pci_unmap_single(pdev, dma_handle, len, DMA_TO_DEVICE);
1862         }
1863 }
1864
1865 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1866                                        struct rocker_desc_info *desc_info,
1867                                        char *buf, size_t buf_len)
1868 {
1869         const struct rocker *rocker = rocker_port->rocker;
1870         struct pci_dev *pdev = rocker->pdev;
1871         dma_addr_t dma_handle;
1872         struct rocker_tlv *frag;
1873
1874         dma_handle = pci_map_single(pdev, buf, buf_len, DMA_TO_DEVICE);
1875         if (unlikely(pci_dma_mapping_error(pdev, dma_handle))) {
1876                 if (net_ratelimit())
1877                         netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1878                 return -EIO;
1879         }
1880         frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1881         if (!frag)
1882                 goto unmap_frag;
1883         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1884                                dma_handle))
1885                 goto nest_cancel;
1886         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1887                                buf_len))
1888                 goto nest_cancel;
1889         rocker_tlv_nest_end(desc_info, frag);
1890         return 0;
1891
1892 nest_cancel:
1893         rocker_tlv_nest_cancel(desc_info, frag);
1894 unmap_frag:
1895         pci_unmap_single(pdev, dma_handle, buf_len, DMA_TO_DEVICE);
1896         return -EMSGSIZE;
1897 }
1898
1899 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1900 {
1901         struct rocker_port *rocker_port = netdev_priv(dev);
1902         struct rocker *rocker = rocker_port->rocker;
1903         struct rocker_desc_info *desc_info;
1904         struct rocker_tlv *frags;
1905         int i;
1906         int err;
1907
1908         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1909         if (unlikely(!desc_info)) {
1910                 if (net_ratelimit())
1911                         netdev_err(dev, "tx ring full when queue awake\n");
1912                 return NETDEV_TX_BUSY;
1913         }
1914
1915         rocker_desc_cookie_ptr_set(desc_info, skb);
1916
1917         frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1918         if (!frags)
1919                 goto out;
1920         err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1921                                           skb->data, skb_headlen(skb));
1922         if (err)
1923                 goto nest_cancel;
1924         if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1925                 err = skb_linearize(skb);
1926                 if (err)
1927                         goto unmap_frags;
1928         }
1929
1930         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1931                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1932
1933                 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1934                                                   skb_frag_address(frag),
1935                                                   skb_frag_size(frag));
1936                 if (err)
1937                         goto unmap_frags;
1938         }
1939         rocker_tlv_nest_end(desc_info, frags);
1940
1941         rocker_desc_gen_clear(desc_info);
1942         rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1943
1944         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1945         if (!desc_info)
1946                 netif_stop_queue(dev);
1947
1948         return NETDEV_TX_OK;
1949
1950 unmap_frags:
1951         rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1952 nest_cancel:
1953         rocker_tlv_nest_cancel(desc_info, frags);
1954 out:
1955         dev_kfree_skb(skb);
1956         dev->stats.tx_dropped++;
1957
1958         return NETDEV_TX_OK;
1959 }
1960
1961 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1962 {
1963         struct sockaddr *addr = p;
1964         struct rocker_port *rocker_port = netdev_priv(dev);
1965         int err;
1966
1967         if (!is_valid_ether_addr(addr->sa_data))
1968                 return -EADDRNOTAVAIL;
1969
1970         err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1971         if (err)
1972                 return err;
1973         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1974         return 0;
1975 }
1976
1977 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1978 {
1979         struct rocker_port *rocker_port = netdev_priv(dev);
1980         int running = netif_running(dev);
1981         int err;
1982
1983         if (running)
1984                 rocker_port_stop(dev);
1985
1986         netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1987         dev->mtu = new_mtu;
1988
1989         err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1990         if (err)
1991                 return err;
1992
1993         if (running)
1994                 err = rocker_port_open(dev);
1995
1996         return err;
1997 }
1998
1999 static int rocker_port_get_phys_port_name(struct net_device *dev,
2000                                           char *buf, size_t len)
2001 {
2002         struct rocker_port *rocker_port = netdev_priv(dev);
2003         struct port_name name = { .buf = buf, .len = len };
2004         int err;
2005
2006         err = rocker_cmd_exec(rocker_port, false,
2007                               rocker_cmd_get_port_settings_prep, NULL,
2008                               rocker_cmd_get_port_settings_phys_name_proc,
2009                               &name);
2010
2011         return err ? -EOPNOTSUPP : 0;
2012 }
2013
2014 static int rocker_port_change_proto_down(struct net_device *dev,
2015                                          bool proto_down)
2016 {
2017         struct rocker_port *rocker_port = netdev_priv(dev);
2018
2019         if (rocker_port->dev->flags & IFF_UP)
2020                 rocker_port_set_enable(rocker_port, !proto_down);
2021         rocker_port->dev->proto_down = proto_down;
2022         return 0;
2023 }
2024
2025 static void rocker_port_neigh_destroy(struct net_device *dev,
2026                                       struct neighbour *n)
2027 {
2028         struct rocker_port *rocker_port = netdev_priv(n->dev);
2029         int err;
2030
2031         err = rocker_world_port_neigh_destroy(rocker_port, n);
2032         if (err)
2033                 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2034                             err);
2035 }
2036
2037 static int rocker_port_get_port_parent_id(struct net_device *dev,
2038                                           struct netdev_phys_item_id *ppid)
2039 {
2040         const struct rocker_port *rocker_port = netdev_priv(dev);
2041         const struct rocker *rocker = rocker_port->rocker;
2042
2043         ppid->id_len = sizeof(rocker->hw.id);
2044         memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2045
2046         return 0;
2047 }
2048
2049 static const struct net_device_ops rocker_port_netdev_ops = {
2050         .ndo_open                       = rocker_port_open,
2051         .ndo_stop                       = rocker_port_stop,
2052         .ndo_start_xmit                 = rocker_port_xmit,
2053         .ndo_set_mac_address            = rocker_port_set_mac_address,
2054         .ndo_change_mtu                 = rocker_port_change_mtu,
2055         .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
2056         .ndo_change_proto_down          = rocker_port_change_proto_down,
2057         .ndo_neigh_destroy              = rocker_port_neigh_destroy,
2058         .ndo_get_port_parent_id         = rocker_port_get_port_parent_id,
2059 };
2060
2061 /********************
2062  * swdev interface
2063  ********************/
2064
2065 static int rocker_port_attr_set(struct net_device *dev,
2066                                 const struct switchdev_attr *attr,
2067                                 struct switchdev_trans *trans)
2068 {
2069         struct rocker_port *rocker_port = netdev_priv(dev);
2070         int err = 0;
2071
2072         switch (attr->id) {
2073         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2074                 err = rocker_world_port_attr_stp_state_set(rocker_port,
2075                                                            attr->u.stp_state,
2076                                                            trans);
2077                 break;
2078         case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2079                 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2080                                                               attr->u.brport_flags,
2081                                                               trans);
2082                 break;
2083         case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2084                 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2085                                                               attr->u.brport_flags,
2086                                                               trans);
2087                 break;
2088         case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2089                 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2090                                                                     attr->u.ageing_time,
2091                                                                     trans);
2092                 break;
2093         default:
2094                 err = -EOPNOTSUPP;
2095                 break;
2096         }
2097
2098         return err;
2099 }
2100
2101 static int rocker_port_obj_add(struct net_device *dev,
2102                                const struct switchdev_obj *obj,
2103                                struct switchdev_trans *trans)
2104 {
2105         struct rocker_port *rocker_port = netdev_priv(dev);
2106         int err = 0;
2107
2108         switch (obj->id) {
2109         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2110                 err = rocker_world_port_obj_vlan_add(rocker_port,
2111                                                      SWITCHDEV_OBJ_PORT_VLAN(obj),
2112                                                      trans);
2113                 break;
2114         default:
2115                 err = -EOPNOTSUPP;
2116                 break;
2117         }
2118
2119         return err;
2120 }
2121
2122 static int rocker_port_obj_del(struct net_device *dev,
2123                                const struct switchdev_obj *obj)
2124 {
2125         struct rocker_port *rocker_port = netdev_priv(dev);
2126         int err = 0;
2127
2128         switch (obj->id) {
2129         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2130                 err = rocker_world_port_obj_vlan_del(rocker_port,
2131                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2132                 break;
2133         default:
2134                 err = -EOPNOTSUPP;
2135                 break;
2136         }
2137
2138         return err;
2139 }
2140
2141 struct rocker_fib_event_work {
2142         struct work_struct work;
2143         union {
2144                 struct fib_entry_notifier_info fen_info;
2145                 struct fib_rule_notifier_info fr_info;
2146         };
2147         struct rocker *rocker;
2148         unsigned long event;
2149 };
2150
2151 static void rocker_router_fib_event_work(struct work_struct *work)
2152 {
2153         struct rocker_fib_event_work *fib_work =
2154                 container_of(work, struct rocker_fib_event_work, work);
2155         struct rocker *rocker = fib_work->rocker;
2156         struct fib_rule *rule;
2157         int err;
2158
2159         /* Protect internal structures from changes */
2160         rtnl_lock();
2161         switch (fib_work->event) {
2162         case FIB_EVENT_ENTRY_REPLACE:
2163                 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2164                 if (err)
2165                         rocker_world_fib4_abort(rocker);
2166                 fib_info_put(fib_work->fen_info.fi);
2167                 break;
2168         case FIB_EVENT_ENTRY_DEL:
2169                 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2170                 fib_info_put(fib_work->fen_info.fi);
2171                 break;
2172         case FIB_EVENT_RULE_ADD: /* fall through */
2173         case FIB_EVENT_RULE_DEL:
2174                 rule = fib_work->fr_info.rule;
2175                 if (!fib4_rule_default(rule))
2176                         rocker_world_fib4_abort(rocker);
2177                 fib_rule_put(rule);
2178                 break;
2179         }
2180         rtnl_unlock();
2181         kfree(fib_work);
2182 }
2183
2184 /* Called with rcu_read_lock() */
2185 static int rocker_router_fib_event(struct notifier_block *nb,
2186                                    unsigned long event, void *ptr)
2187 {
2188         struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2189         struct rocker_fib_event_work *fib_work;
2190         struct fib_notifier_info *info = ptr;
2191
2192         if (info->family != AF_INET)
2193                 return NOTIFY_DONE;
2194
2195         fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2196         if (WARN_ON(!fib_work))
2197                 return NOTIFY_BAD;
2198
2199         INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2200         fib_work->rocker = rocker;
2201         fib_work->event = event;
2202
2203         switch (event) {
2204         case FIB_EVENT_ENTRY_REPLACE: /* fall through */
2205         case FIB_EVENT_ENTRY_DEL:
2206                 if (info->family == AF_INET) {
2207                         struct fib_entry_notifier_info *fen_info = ptr;
2208
2209                         if (fen_info->fi->fib_nh_is_v6) {
2210                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2211                                 kfree(fib_work);
2212                                 return notifier_from_errno(-EINVAL);
2213                         }
2214                         if (fen_info->fi->nh) {
2215                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2216                                 kfree(fib_work);
2217                                 return notifier_from_errno(-EINVAL);
2218                         }
2219                 }
2220
2221                 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2222                 /* Take referece on fib_info to prevent it from being
2223                  * freed while work is queued. Release it afterwards.
2224                  */
2225                 fib_info_hold(fib_work->fen_info.fi);
2226                 break;
2227         case FIB_EVENT_RULE_ADD: /* fall through */
2228         case FIB_EVENT_RULE_DEL:
2229                 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2230                 fib_rule_get(fib_work->fr_info.rule);
2231                 break;
2232         }
2233
2234         queue_work(rocker->rocker_owq, &fib_work->work);
2235
2236         return NOTIFY_DONE;
2237 }
2238
2239 /********************
2240  * ethtool interface
2241  ********************/
2242
2243 static int
2244 rocker_port_get_link_ksettings(struct net_device *dev,
2245                                struct ethtool_link_ksettings *ecmd)
2246 {
2247         struct rocker_port *rocker_port = netdev_priv(dev);
2248
2249         return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2250 }
2251
2252 static int
2253 rocker_port_set_link_ksettings(struct net_device *dev,
2254                                const struct ethtool_link_ksettings *ecmd)
2255 {
2256         struct rocker_port *rocker_port = netdev_priv(dev);
2257
2258         return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2259 }
2260
2261 static void rocker_port_get_drvinfo(struct net_device *dev,
2262                                     struct ethtool_drvinfo *drvinfo)
2263 {
2264         strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2265         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2266 }
2267
2268 static struct rocker_port_stats {
2269         char str[ETH_GSTRING_LEN];
2270         int type;
2271 } rocker_port_stats[] = {
2272         { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2273         { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2274         { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2275         { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2276
2277         { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2278         { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2279         { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2280         { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2281 };
2282
2283 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2284
2285 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2286                                     u8 *data)
2287 {
2288         u8 *p = data;
2289         int i;
2290
2291         switch (stringset) {
2292         case ETH_SS_STATS:
2293                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2294                         memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2295                         p += ETH_GSTRING_LEN;
2296                 }
2297                 break;
2298         }
2299 }
2300
2301 static int
2302 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2303                                struct rocker_desc_info *desc_info,
2304                                void *priv)
2305 {
2306         struct rocker_tlv *cmd_stats;
2307
2308         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2309                                ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2310                 return -EMSGSIZE;
2311
2312         cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2313         if (!cmd_stats)
2314                 return -EMSGSIZE;
2315
2316         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2317                                rocker_port->pport))
2318                 return -EMSGSIZE;
2319
2320         rocker_tlv_nest_end(desc_info, cmd_stats);
2321
2322         return 0;
2323 }
2324
2325 static int
2326 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2327                                        const struct rocker_desc_info *desc_info,
2328                                        void *priv)
2329 {
2330         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2331         const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2332         const struct rocker_tlv *pattr;
2333         u32 pport;
2334         u64 *data = priv;
2335         int i;
2336
2337         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2338
2339         if (!attrs[ROCKER_TLV_CMD_INFO])
2340                 return -EIO;
2341
2342         rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2343                                 attrs[ROCKER_TLV_CMD_INFO]);
2344
2345         if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2346                 return -EIO;
2347
2348         pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2349         if (pport != rocker_port->pport)
2350                 return -EIO;
2351
2352         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2353                 pattr = stats_attrs[rocker_port_stats[i].type];
2354                 if (!pattr)
2355                         continue;
2356
2357                 data[i] = rocker_tlv_get_u64(pattr);
2358         }
2359
2360         return 0;
2361 }
2362
2363 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2364                                              void *priv)
2365 {
2366         return rocker_cmd_exec(rocker_port, false,
2367                                rocker_cmd_get_port_stats_prep, NULL,
2368                                rocker_cmd_get_port_stats_ethtool_proc,
2369                                priv);
2370 }
2371
2372 static void rocker_port_get_stats(struct net_device *dev,
2373                                   struct ethtool_stats *stats, u64 *data)
2374 {
2375         struct rocker_port *rocker_port = netdev_priv(dev);
2376
2377         if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2378                 int i;
2379
2380                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2381                         data[i] = 0;
2382         }
2383 }
2384
2385 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2386 {
2387         switch (sset) {
2388         case ETH_SS_STATS:
2389                 return ROCKER_PORT_STATS_LEN;
2390         default:
2391                 return -EOPNOTSUPP;
2392         }
2393 }
2394
2395 static const struct ethtool_ops rocker_port_ethtool_ops = {
2396         .get_drvinfo            = rocker_port_get_drvinfo,
2397         .get_link               = ethtool_op_get_link,
2398         .get_strings            = rocker_port_get_strings,
2399         .get_ethtool_stats      = rocker_port_get_stats,
2400         .get_sset_count         = rocker_port_get_sset_count,
2401         .get_link_ksettings     = rocker_port_get_link_ksettings,
2402         .set_link_ksettings     = rocker_port_set_link_ksettings,
2403 };
2404
2405 /*****************
2406  * NAPI interface
2407  *****************/
2408
2409 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2410 {
2411         return container_of(napi, struct rocker_port, napi_tx);
2412 }
2413
2414 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2415 {
2416         struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2417         const struct rocker *rocker = rocker_port->rocker;
2418         const struct rocker_desc_info *desc_info;
2419         u32 credits = 0;
2420         int err;
2421
2422         /* Cleanup tx descriptors */
2423         while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2424                 struct sk_buff *skb;
2425
2426                 err = rocker_desc_err(desc_info);
2427                 if (err && net_ratelimit())
2428                         netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2429                                    err);
2430                 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2431
2432                 skb = rocker_desc_cookie_ptr_get(desc_info);
2433                 if (err == 0) {
2434                         rocker_port->dev->stats.tx_packets++;
2435                         rocker_port->dev->stats.tx_bytes += skb->len;
2436                 } else {
2437                         rocker_port->dev->stats.tx_errors++;
2438                 }
2439
2440                 dev_kfree_skb_any(skb);
2441                 credits++;
2442         }
2443
2444         if (credits && netif_queue_stopped(rocker_port->dev))
2445                 netif_wake_queue(rocker_port->dev);
2446
2447         napi_complete(napi);
2448         rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2449
2450         return 0;
2451 }
2452
2453 static int rocker_port_rx_proc(const struct rocker *rocker,
2454                                const struct rocker_port *rocker_port,
2455                                struct rocker_desc_info *desc_info)
2456 {
2457         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2458         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2459         size_t rx_len;
2460         u16 rx_flags = 0;
2461
2462         if (!skb)
2463                 return -ENOENT;
2464
2465         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2466         if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2467                 return -EINVAL;
2468         if (attrs[ROCKER_TLV_RX_FLAGS])
2469                 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2470
2471         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2472
2473         rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2474         skb_put(skb, rx_len);
2475         skb->protocol = eth_type_trans(skb, rocker_port->dev);
2476
2477         if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2478                 skb->offload_fwd_mark = 1;
2479
2480         rocker_port->dev->stats.rx_packets++;
2481         rocker_port->dev->stats.rx_bytes += skb->len;
2482
2483         netif_receive_skb(skb);
2484
2485         return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2486 }
2487
2488 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2489 {
2490         return container_of(napi, struct rocker_port, napi_rx);
2491 }
2492
2493 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2494 {
2495         struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2496         const struct rocker *rocker = rocker_port->rocker;
2497         struct rocker_desc_info *desc_info;
2498         u32 credits = 0;
2499         int err;
2500
2501         /* Process rx descriptors */
2502         while (credits < budget &&
2503                (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2504                 err = rocker_desc_err(desc_info);
2505                 if (err) {
2506                         if (net_ratelimit())
2507                                 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2508                                            err);
2509                 } else {
2510                         err = rocker_port_rx_proc(rocker, rocker_port,
2511                                                   desc_info);
2512                         if (err && net_ratelimit())
2513                                 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2514                                            err);
2515                 }
2516                 if (err)
2517                         rocker_port->dev->stats.rx_errors++;
2518
2519                 rocker_desc_gen_clear(desc_info);
2520                 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2521                 credits++;
2522         }
2523
2524         if (credits < budget)
2525                 napi_complete_done(napi, credits);
2526
2527         rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2528
2529         return credits;
2530 }
2531
2532 /*****************
2533  * PCI driver ops
2534  *****************/
2535
2536 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2537 {
2538         const struct rocker *rocker = rocker_port->rocker;
2539         u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2540         bool link_up;
2541
2542         link_up = link_status & (1 << rocker_port->pport);
2543         if (link_up)
2544                 netif_carrier_on(rocker_port->dev);
2545         else
2546                 netif_carrier_off(rocker_port->dev);
2547 }
2548
2549 static void rocker_remove_ports(struct rocker *rocker)
2550 {
2551         struct rocker_port *rocker_port;
2552         int i;
2553
2554         for (i = 0; i < rocker->port_count; i++) {
2555                 rocker_port = rocker->ports[i];
2556                 if (!rocker_port)
2557                         continue;
2558                 rocker_world_port_fini(rocker_port);
2559                 unregister_netdev(rocker_port->dev);
2560                 rocker_world_port_post_fini(rocker_port);
2561                 free_netdev(rocker_port->dev);
2562         }
2563         rocker_world_fini(rocker);
2564         kfree(rocker->ports);
2565 }
2566
2567 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2568 {
2569         const struct rocker *rocker = rocker_port->rocker;
2570         const struct pci_dev *pdev = rocker->pdev;
2571         int err;
2572
2573         err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2574                                                    rocker_port->dev->dev_addr);
2575         if (err) {
2576                 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2577                 eth_hw_addr_random(rocker_port->dev);
2578         }
2579 }
2580
2581 #define ROCKER_PORT_MIN_MTU     ETH_MIN_MTU
2582 #define ROCKER_PORT_MAX_MTU     9000
2583 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2584 {
2585         struct pci_dev *pdev = rocker->pdev;
2586         struct rocker_port *rocker_port;
2587         struct net_device *dev;
2588         int err;
2589
2590         dev = alloc_etherdev(sizeof(struct rocker_port));
2591         if (!dev)
2592                 return -ENOMEM;
2593         SET_NETDEV_DEV(dev, &pdev->dev);
2594         rocker_port = netdev_priv(dev);
2595         rocker_port->dev = dev;
2596         rocker_port->rocker = rocker;
2597         rocker_port->port_number = port_number;
2598         rocker_port->pport = port_number + 1;
2599
2600         err = rocker_world_check_init(rocker_port);
2601         if (err) {
2602                 dev_err(&pdev->dev, "world init failed\n");
2603                 goto err_world_check_init;
2604         }
2605
2606         rocker_port_dev_addr_init(rocker_port);
2607         dev->netdev_ops = &rocker_port_netdev_ops;
2608         dev->ethtool_ops = &rocker_port_ethtool_ops;
2609         netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2610                           NAPI_POLL_WEIGHT);
2611         netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2612                        NAPI_POLL_WEIGHT);
2613         rocker_carrier_init(rocker_port);
2614
2615         dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2616
2617         /* MTU range: 68 - 9000 */
2618         dev->min_mtu = ROCKER_PORT_MIN_MTU;
2619         dev->max_mtu = ROCKER_PORT_MAX_MTU;
2620
2621         err = rocker_world_port_pre_init(rocker_port);
2622         if (err) {
2623                 dev_err(&pdev->dev, "port world pre-init failed\n");
2624                 goto err_world_port_pre_init;
2625         }
2626         err = register_netdev(dev);
2627         if (err) {
2628                 dev_err(&pdev->dev, "register_netdev failed\n");
2629                 goto err_register_netdev;
2630         }
2631         rocker->ports[port_number] = rocker_port;
2632
2633         err = rocker_world_port_init(rocker_port);
2634         if (err) {
2635                 dev_err(&pdev->dev, "port world init failed\n");
2636                 goto err_world_port_init;
2637         }
2638
2639         return 0;
2640
2641 err_world_port_init:
2642         rocker->ports[port_number] = NULL;
2643         unregister_netdev(dev);
2644 err_register_netdev:
2645         rocker_world_port_post_fini(rocker_port);
2646 err_world_port_pre_init:
2647 err_world_check_init:
2648         free_netdev(dev);
2649         return err;
2650 }
2651
2652 static int rocker_probe_ports(struct rocker *rocker)
2653 {
2654         int i;
2655         size_t alloc_size;
2656         int err;
2657
2658         alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2659         rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2660         if (!rocker->ports)
2661                 return -ENOMEM;
2662         for (i = 0; i < rocker->port_count; i++) {
2663                 err = rocker_probe_port(rocker, i);
2664                 if (err)
2665                         goto remove_ports;
2666         }
2667         return 0;
2668
2669 remove_ports:
2670         rocker_remove_ports(rocker);
2671         return err;
2672 }
2673
2674 static int rocker_msix_init(struct rocker *rocker)
2675 {
2676         struct pci_dev *pdev = rocker->pdev;
2677         int msix_entries;
2678         int i;
2679         int err;
2680
2681         msix_entries = pci_msix_vec_count(pdev);
2682         if (msix_entries < 0)
2683                 return msix_entries;
2684
2685         if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2686                 return -EINVAL;
2687
2688         rocker->msix_entries = kmalloc_array(msix_entries,
2689                                              sizeof(struct msix_entry),
2690                                              GFP_KERNEL);
2691         if (!rocker->msix_entries)
2692                 return -ENOMEM;
2693
2694         for (i = 0; i < msix_entries; i++)
2695                 rocker->msix_entries[i].entry = i;
2696
2697         err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2698         if (err < 0)
2699                 goto err_enable_msix;
2700
2701         return 0;
2702
2703 err_enable_msix:
2704         kfree(rocker->msix_entries);
2705         return err;
2706 }
2707
2708 static void rocker_msix_fini(const struct rocker *rocker)
2709 {
2710         pci_disable_msix(rocker->pdev);
2711         kfree(rocker->msix_entries);
2712 }
2713
2714 static bool rocker_port_dev_check(const struct net_device *dev)
2715 {
2716         return dev->netdev_ops == &rocker_port_netdev_ops;
2717 }
2718
2719 static int
2720 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2721                 struct switchdev_notifier_port_attr_info *port_attr_info)
2722 {
2723         int err;
2724
2725         err = rocker_port_attr_set(netdev, port_attr_info->attr,
2726                                    port_attr_info->trans);
2727
2728         port_attr_info->handled = true;
2729         return notifier_from_errno(err);
2730 }
2731
2732 struct rocker_switchdev_event_work {
2733         struct work_struct work;
2734         struct switchdev_notifier_fdb_info fdb_info;
2735         struct rocker_port *rocker_port;
2736         unsigned long event;
2737 };
2738
2739 static void
2740 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2741                           struct switchdev_notifier_fdb_info *recv_info)
2742 {
2743         struct switchdev_notifier_fdb_info info;
2744
2745         info.addr = recv_info->addr;
2746         info.vid = recv_info->vid;
2747         info.offloaded = true;
2748         call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2749                                  rocker_port->dev, &info.info, NULL);
2750 }
2751
2752 static void rocker_switchdev_event_work(struct work_struct *work)
2753 {
2754         struct rocker_switchdev_event_work *switchdev_work =
2755                 container_of(work, struct rocker_switchdev_event_work, work);
2756         struct rocker_port *rocker_port = switchdev_work->rocker_port;
2757         struct switchdev_notifier_fdb_info *fdb_info;
2758         int err;
2759
2760         rtnl_lock();
2761         switch (switchdev_work->event) {
2762         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2763                 fdb_info = &switchdev_work->fdb_info;
2764                 if (!fdb_info->added_by_user)
2765                         break;
2766                 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2767                 if (err) {
2768                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2769                         break;
2770                 }
2771                 rocker_fdb_offload_notify(rocker_port, fdb_info);
2772                 break;
2773         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2774                 fdb_info = &switchdev_work->fdb_info;
2775                 if (!fdb_info->added_by_user)
2776                         break;
2777                 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2778                 if (err)
2779                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2780                 break;
2781         }
2782         rtnl_unlock();
2783
2784         kfree(switchdev_work->fdb_info.addr);
2785         kfree(switchdev_work);
2786         dev_put(rocker_port->dev);
2787 }
2788
2789 /* called under rcu_read_lock() */
2790 static int rocker_switchdev_event(struct notifier_block *unused,
2791                                   unsigned long event, void *ptr)
2792 {
2793         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2794         struct rocker_switchdev_event_work *switchdev_work;
2795         struct switchdev_notifier_fdb_info *fdb_info = ptr;
2796         struct rocker_port *rocker_port;
2797
2798         if (!rocker_port_dev_check(dev))
2799                 return NOTIFY_DONE;
2800
2801         if (event == SWITCHDEV_PORT_ATTR_SET)
2802                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2803
2804         rocker_port = netdev_priv(dev);
2805         switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2806         if (WARN_ON(!switchdev_work))
2807                 return NOTIFY_BAD;
2808
2809         INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2810         switchdev_work->rocker_port = rocker_port;
2811         switchdev_work->event = event;
2812
2813         switch (event) {
2814         case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
2815         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2816                 memcpy(&switchdev_work->fdb_info, ptr,
2817                        sizeof(switchdev_work->fdb_info));
2818                 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2819                 if (unlikely(!switchdev_work->fdb_info.addr)) {
2820                         kfree(switchdev_work);
2821                         return NOTIFY_BAD;
2822                 }
2823
2824                 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2825                                 fdb_info->addr);
2826                 /* Take a reference on the rocker device */
2827                 dev_hold(dev);
2828                 break;
2829         default:
2830                 kfree(switchdev_work);
2831                 return NOTIFY_DONE;
2832         }
2833
2834         queue_work(rocker_port->rocker->rocker_owq,
2835                    &switchdev_work->work);
2836         return NOTIFY_DONE;
2837 }
2838
2839 static int
2840 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2841                         struct switchdev_notifier_port_obj_info *port_obj_info)
2842 {
2843         int err = -EOPNOTSUPP;
2844
2845         switch (event) {
2846         case SWITCHDEV_PORT_OBJ_ADD:
2847                 err = rocker_port_obj_add(netdev, port_obj_info->obj,
2848                                           port_obj_info->trans);
2849                 break;
2850         case SWITCHDEV_PORT_OBJ_DEL:
2851                 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2852                 break;
2853         }
2854
2855         port_obj_info->handled = true;
2856         return notifier_from_errno(err);
2857 }
2858
2859 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2860                                            unsigned long event, void *ptr)
2861 {
2862         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2863
2864         if (!rocker_port_dev_check(dev))
2865                 return NOTIFY_DONE;
2866
2867         switch (event) {
2868         case SWITCHDEV_PORT_OBJ_ADD:
2869         case SWITCHDEV_PORT_OBJ_DEL:
2870                 return rocker_switchdev_port_obj_event(event, dev, ptr);
2871         case SWITCHDEV_PORT_ATTR_SET:
2872                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2873         }
2874
2875         return NOTIFY_DONE;
2876 }
2877
2878 static struct notifier_block rocker_switchdev_notifier = {
2879         .notifier_call = rocker_switchdev_event,
2880 };
2881
2882 static struct notifier_block rocker_switchdev_blocking_notifier = {
2883         .notifier_call = rocker_switchdev_blocking_event,
2884 };
2885
2886 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2887 {
2888         struct notifier_block *nb;
2889         struct rocker *rocker;
2890         int err;
2891
2892         rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2893         if (!rocker)
2894                 return -ENOMEM;
2895
2896         err = pci_enable_device(pdev);
2897         if (err) {
2898                 dev_err(&pdev->dev, "pci_enable_device failed\n");
2899                 goto err_pci_enable_device;
2900         }
2901
2902         err = pci_request_regions(pdev, rocker_driver_name);
2903         if (err) {
2904                 dev_err(&pdev->dev, "pci_request_regions failed\n");
2905                 goto err_pci_request_regions;
2906         }
2907
2908         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2909         if (!err) {
2910                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2911                 if (err) {
2912                         dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
2913                         goto err_pci_set_dma_mask;
2914                 }
2915         } else {
2916                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2917                 if (err) {
2918                         dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
2919                         goto err_pci_set_dma_mask;
2920                 }
2921         }
2922
2923         if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2924                 dev_err(&pdev->dev, "invalid PCI region size\n");
2925                 err = -EINVAL;
2926                 goto err_pci_resource_len_check;
2927         }
2928
2929         rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2930                                   pci_resource_len(pdev, 0));
2931         if (!rocker->hw_addr) {
2932                 dev_err(&pdev->dev, "ioremap failed\n");
2933                 err = -EIO;
2934                 goto err_ioremap;
2935         }
2936         pci_set_master(pdev);
2937
2938         rocker->pdev = pdev;
2939         pci_set_drvdata(pdev, rocker);
2940
2941         rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2942
2943         err = rocker_msix_init(rocker);
2944         if (err) {
2945                 dev_err(&pdev->dev, "MSI-X init failed\n");
2946                 goto err_msix_init;
2947         }
2948
2949         err = rocker_basic_hw_test(rocker);
2950         if (err) {
2951                 dev_err(&pdev->dev, "basic hw test failed\n");
2952                 goto err_basic_hw_test;
2953         }
2954
2955         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2956
2957         err = rocker_dma_rings_init(rocker);
2958         if (err)
2959                 goto err_dma_rings_init;
2960
2961         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2962                           rocker_cmd_irq_handler, 0,
2963                           rocker_driver_name, rocker);
2964         if (err) {
2965                 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2966                 goto err_request_cmd_irq;
2967         }
2968
2969         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2970                           rocker_event_irq_handler, 0,
2971                           rocker_driver_name, rocker);
2972         if (err) {
2973                 dev_err(&pdev->dev, "cannot assign event irq\n");
2974                 goto err_request_event_irq;
2975         }
2976
2977         rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2978                                                      WQ_MEM_RECLAIM);
2979         if (!rocker->rocker_owq) {
2980                 err = -ENOMEM;
2981                 goto err_alloc_ordered_workqueue;
2982         }
2983
2984         err = rocker_probe_ports(rocker);
2985         if (err) {
2986                 dev_err(&pdev->dev, "failed to probe ports\n");
2987                 goto err_probe_ports;
2988         }
2989
2990         /* Only FIBs pointing to our own netdevs are programmed into
2991          * the device, so no need to pass a callback.
2992          */
2993         rocker->fib_nb.notifier_call = rocker_router_fib_event;
2994         err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2995         if (err)
2996                 goto err_register_fib_notifier;
2997
2998         err = register_switchdev_notifier(&rocker_switchdev_notifier);
2999         if (err) {
3000                 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
3001                 goto err_register_switchdev_notifier;
3002         }
3003
3004         nb = &rocker_switchdev_blocking_notifier;
3005         err = register_switchdev_blocking_notifier(nb);
3006         if (err) {
3007                 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
3008                 goto err_register_switchdev_blocking_notifier;
3009         }
3010
3011         rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
3012
3013         dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
3014                  (int)sizeof(rocker->hw.id), &rocker->hw.id);
3015
3016         return 0;
3017
3018 err_register_switchdev_blocking_notifier:
3019         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3020 err_register_switchdev_notifier:
3021         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3022 err_register_fib_notifier:
3023         rocker_remove_ports(rocker);
3024 err_probe_ports:
3025         destroy_workqueue(rocker->rocker_owq);
3026 err_alloc_ordered_workqueue:
3027         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3028 err_request_event_irq:
3029         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3030 err_request_cmd_irq:
3031         rocker_dma_rings_fini(rocker);
3032 err_dma_rings_init:
3033 err_basic_hw_test:
3034         rocker_msix_fini(rocker);
3035 err_msix_init:
3036         iounmap(rocker->hw_addr);
3037 err_ioremap:
3038 err_pci_resource_len_check:
3039 err_pci_set_dma_mask:
3040         pci_release_regions(pdev);
3041 err_pci_request_regions:
3042         pci_disable_device(pdev);
3043 err_pci_enable_device:
3044         kfree(rocker);
3045         return err;
3046 }
3047
3048 static void rocker_remove(struct pci_dev *pdev)
3049 {
3050         struct rocker *rocker = pci_get_drvdata(pdev);
3051         struct notifier_block *nb;
3052
3053         nb = &rocker_switchdev_blocking_notifier;
3054         unregister_switchdev_blocking_notifier(nb);
3055
3056         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3057         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3058         rocker_remove_ports(rocker);
3059         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3060         destroy_workqueue(rocker->rocker_owq);
3061         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3062         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3063         rocker_dma_rings_fini(rocker);
3064         rocker_msix_fini(rocker);
3065         iounmap(rocker->hw_addr);
3066         pci_release_regions(rocker->pdev);
3067         pci_disable_device(rocker->pdev);
3068         kfree(rocker);
3069 }
3070
3071 static struct pci_driver rocker_pci_driver = {
3072         .name           = rocker_driver_name,
3073         .id_table       = rocker_pci_id_table,
3074         .probe          = rocker_probe,
3075         .remove         = rocker_remove,
3076 };
3077
3078 /************************************
3079  * Net device notifier event handler
3080  ************************************/
3081
3082 static bool rocker_port_dev_check_under(const struct net_device *dev,
3083                                         struct rocker *rocker)
3084 {
3085         struct rocker_port *rocker_port;
3086
3087         if (!rocker_port_dev_check(dev))
3088                 return false;
3089
3090         rocker_port = netdev_priv(dev);
3091         if (rocker_port->rocker != rocker)
3092                 return false;
3093
3094         return true;
3095 }
3096
3097 struct rocker_walk_data {
3098         struct rocker *rocker;
3099         struct rocker_port *port;
3100 };
3101
3102 static int rocker_lower_dev_walk(struct net_device *lower_dev, void *_data)
3103 {
3104         struct rocker_walk_data *data = _data;
3105         int ret = 0;
3106
3107         if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3108                 data->port = netdev_priv(lower_dev);
3109                 ret = 1;
3110         }
3111
3112         return ret;
3113 }
3114
3115 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3116                                                struct rocker *rocker)
3117 {
3118         struct rocker_walk_data data;
3119
3120         if (rocker_port_dev_check_under(dev, rocker))
3121                 return netdev_priv(dev);
3122
3123         data.rocker = rocker;
3124         data.port = NULL;
3125         netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &data);
3126
3127         return data.port;
3128 }
3129
3130 static int rocker_netdevice_event(struct notifier_block *unused,
3131                                   unsigned long event, void *ptr)
3132 {
3133         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3134         struct netdev_notifier_changeupper_info *info;
3135         struct rocker_port *rocker_port;
3136         int err;
3137
3138         if (!rocker_port_dev_check(dev))
3139                 return NOTIFY_DONE;
3140
3141         switch (event) {
3142         case NETDEV_CHANGEUPPER:
3143                 info = ptr;
3144                 if (!info->master)
3145                         goto out;
3146                 rocker_port = netdev_priv(dev);
3147                 if (info->linking) {
3148                         err = rocker_world_port_master_linked(rocker_port,
3149                                                               info->upper_dev);
3150                         if (err)
3151                                 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3152                                             err);
3153                 } else {
3154                         err = rocker_world_port_master_unlinked(rocker_port,
3155                                                                 info->upper_dev);
3156                         if (err)
3157                                 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3158                                             err);
3159                 }
3160         }
3161 out:
3162         return NOTIFY_DONE;
3163 }
3164
3165 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3166         .notifier_call = rocker_netdevice_event,
3167 };
3168
3169 /************************************
3170  * Net event notifier event handler
3171  ************************************/
3172
3173 static int rocker_netevent_event(struct notifier_block *unused,
3174                                  unsigned long event, void *ptr)
3175 {
3176         struct rocker_port *rocker_port;
3177         struct net_device *dev;
3178         struct neighbour *n = ptr;
3179         int err;
3180
3181         switch (event) {
3182         case NETEVENT_NEIGH_UPDATE:
3183                 if (n->tbl != &arp_tbl)
3184                         return NOTIFY_DONE;
3185                 dev = n->dev;
3186                 if (!rocker_port_dev_check(dev))
3187                         return NOTIFY_DONE;
3188                 rocker_port = netdev_priv(dev);
3189                 err = rocker_world_port_neigh_update(rocker_port, n);
3190                 if (err)
3191                         netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3192                                     err);
3193                 break;
3194         }
3195
3196         return NOTIFY_DONE;
3197 }
3198
3199 static struct notifier_block rocker_netevent_nb __read_mostly = {
3200         .notifier_call = rocker_netevent_event,
3201 };
3202
3203 /***********************
3204  * Module init and exit
3205  ***********************/
3206
3207 static int __init rocker_module_init(void)
3208 {
3209         int err;
3210
3211         register_netdevice_notifier(&rocker_netdevice_nb);
3212         register_netevent_notifier(&rocker_netevent_nb);
3213         err = pci_register_driver(&rocker_pci_driver);
3214         if (err)
3215                 goto err_pci_register_driver;
3216         return 0;
3217
3218 err_pci_register_driver:
3219         unregister_netevent_notifier(&rocker_netevent_nb);
3220         unregister_netdevice_notifier(&rocker_netdevice_nb);
3221         return err;
3222 }
3223
3224 static void __exit rocker_module_exit(void)
3225 {
3226         unregister_netevent_notifier(&rocker_netevent_nb);
3227         unregister_netdevice_notifier(&rocker_netdevice_nb);
3228         pci_unregister_driver(&rocker_pci_driver);
3229 }
3230
3231 module_init(rocker_module_init);
3232 module_exit(rocker_module_exit);
3233
3234 MODULE_LICENSE("GPL v2");
3235 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3236 MODULE_AUTHOR("Scott Feldman <[email protected]>");
3237 MODULE_DESCRIPTION("Rocker switch device driver");
3238 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);