drivers/net/ethernet/rocker/rocker_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
   4  * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
   5  * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/sched.h>
  13 #include <linux/wait.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/sort.h>
  16 #include <linux/random.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/socket.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/if_ether.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/if_bridge.h>
  25 #include <linux/bitops.h>
  26 #include <linux/ctype.h>
  27 #include <linux/workqueue.h>
  28 #include <net/switchdev.h>
  29 #include <net/rtnetlink.h>
  30 #include <net/netevent.h>
  31 #include <net/arp.h>
  32 #include <net/fib_rules.h>
  33 #include <net/fib_notifier.h>
  34 #include <linux/io-64-nonatomic-lo-hi.h>
  35 #include <generated/utsrelease.h>
  36
  37 #include "rocker_hw.h"
  38 #include "rocker.h"
  39 #include "rocker_tlv.h"
  40
  41 static const char rocker_driver_name[] = "rocker";
  42
  43 static const struct pci_device_id rocker_pci_id_table[] = {
  44         {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
  45         {0, }
  46 };
  47
  48 struct rocker_wait {
  49         wait_queue_head_t wait;
  50         bool done;
  51         bool nowait;
  52 };
  53
  54 static void rocker_wait_reset(struct rocker_wait *wait)
  55 {
  56         wait->done = false;
  57         wait->nowait = false;
  58 }
  59
  60 static void rocker_wait_init(struct rocker_wait *wait)
  61 {
  62         init_waitqueue_head(&wait->wait);
  63         rocker_wait_reset(wait);
  64 }
  65
  66 static struct rocker_wait *rocker_wait_create(void)
  67 {
  68         struct rocker_wait *wait;
  69
  70         wait = kzalloc(sizeof(*wait), GFP_KERNEL);
  71         if (!wait)
  72                 return NULL;
  73         return wait;
  74 }
  75
  76 static void rocker_wait_destroy(struct rocker_wait *wait)
  77 {
  78         kfree(wait);
  79 }
  80
  81 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
  82                                       unsigned long timeout)
  83 {
  84         wait_event_timeout(wait->wait, wait->done, HZ / 10);
  85         if (!wait->done)
  86                 return false;
  87         return true;
  88 }
  89
  90 static void rocker_wait_wake_up(struct rocker_wait *wait)
  91 {
  92         wait->done = true;
  93         wake_up(&wait->wait);
  94 }
  95
  96 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
  97 {
  98         return rocker->msix_entries[vector].vector;
  99 }
 100
 101 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
 102 {
 103         return rocker_msix_vector(rocker_port->rocker,
 104                                   ROCKER_MSIX_VEC_TX(rocker_port->port_number));
 105 }
 106
 107 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
 108 {
 109         return rocker_msix_vector(rocker_port->rocker,
 110                                   ROCKER_MSIX_VEC_RX(rocker_port->port_number));
 111 }
 112
 113 #define rocker_write32(rocker, reg, val)        \
 114         writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 115 #define rocker_read32(rocker, reg)      \
 116         readl((rocker)->hw_addr + (ROCKER_ ## reg))
 117 #define rocker_write64(rocker, reg, val)        \
 118         writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 119 #define rocker_read64(rocker, reg)      \
 120         readq((rocker)->hw_addr + (ROCKER_ ## reg))
 121
 122 /*****************************
 123  * HW basic testing functions
 124  *****************************/
 125
 126 static int rocker_reg_test(const struct rocker *rocker)
 127 {
 128         const struct pci_dev *pdev = rocker->pdev;
 129         u64 test_reg;
 130         u64 rnd;
 131
 132         rnd = prandom_u32();
 133         rnd >>= 1;
 134         rocker_write32(rocker, TEST_REG, rnd);
 135         test_reg = rocker_read32(rocker, TEST_REG);
 136         if (test_reg != rnd * 2) {
 137                 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
 138                         test_reg, rnd * 2);
 139                 return -EIO;
 140         }
 141
 142         rnd = prandom_u32();
 143         rnd <<= 31;
 144         rnd |= prandom_u32();
 145         rocker_write64(rocker, TEST_REG64, rnd);
 146         test_reg = rocker_read64(rocker, TEST_REG64);
 147         if (test_reg != rnd * 2) {
 148                 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
 149                         test_reg, rnd * 2);
 150                 return -EIO;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static int rocker_dma_test_one(const struct rocker *rocker,
 157                                struct rocker_wait *wait, u32 test_type,
 158                                dma_addr_t dma_handle, const unsigned char *buf,
 159                                const unsigned char *expect, size_t size)
 160 {
 161         const struct pci_dev *pdev = rocker->pdev;
 162         int i;
 163
 164         rocker_wait_reset(wait);
 165         rocker_write32(rocker, TEST_DMA_CTRL, test_type);
 166
 167         if (!rocker_wait_event_timeout(wait, HZ / 10)) {
 168                 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
 169                 return -EIO;
 170         }
 171
 172         for (i = 0; i < size; i++) {
 173                 if (buf[i] != expect[i]) {
 174                         dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
 175                                 buf[i], i, expect[i]);
 176                         return -EIO;
 177                 }
 178         }
 179         return 0;
 180 }
 181
 182 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
 183 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
 184
 185 static int rocker_dma_test_offset(const struct rocker *rocker,
 186                                   struct rocker_wait *wait, int offset)
 187 {
 188         struct pci_dev *pdev = rocker->pdev;
 189         unsigned char *alloc;
 190         unsigned char *buf;
 191         unsigned char *expect;
 192         dma_addr_t dma_handle;
 193         int i;
 194         int err;
 195
 196         alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
 197                         GFP_KERNEL | GFP_DMA);
 198         if (!alloc)
 199                 return -ENOMEM;
 200         buf = alloc + offset;
 201         expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
 202
 203         dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
 204                                     DMA_BIDIRECTIONAL);
 205         if (dma_mapping_error(&pdev->dev, dma_handle)) {
 206                 err = -EIO;
 207                 goto free_alloc;
 208         }
 209
 210         rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
 211         rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
 212
 213         memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
 214         err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
 215                                   dma_handle, buf, expect,
 216                                   ROCKER_TEST_DMA_BUF_SIZE);
 217         if (err)
 218                 goto unmap;
 219
 220         memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
 221         err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
 222                                   dma_handle, buf, expect,
 223                                   ROCKER_TEST_DMA_BUF_SIZE);
 224         if (err)
 225                 goto unmap;
 226
 227         prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
 228         for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
 229                 expect[i] = ~buf[i];
 230         err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
 231                                   dma_handle, buf, expect,
 232                                   ROCKER_TEST_DMA_BUF_SIZE);
 233         if (err)
 234                 goto unmap;
 235
 236 unmap:
 237         dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
 238                          DMA_BIDIRECTIONAL);
 239 free_alloc:
 240         kfree(alloc);
 241
 242         return err;
 243 }
 244
 245 static int rocker_dma_test(const struct rocker *rocker,
 246                            struct rocker_wait *wait)
 247 {
 248         int i;
 249         int err;
 250
 251         for (i = 0; i < 8; i++) {
 252                 err = rocker_dma_test_offset(rocker, wait, i);
 253                 if (err)
 254                         return err;
 255         }
 256         return 0;
 257 }
 258
 259 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
 260 {
 261         struct rocker_wait *wait = dev_id;
 262
 263         rocker_wait_wake_up(wait);
 264
 265         return IRQ_HANDLED;
 266 }
 267
 268 static int rocker_basic_hw_test(const struct rocker *rocker)
 269 {
 270         const struct pci_dev *pdev = rocker->pdev;
 271         struct rocker_wait wait;
 272         int err;
 273
 274         err = rocker_reg_test(rocker);
 275         if (err) {
 276                 dev_err(&pdev->dev, "reg test failed\n");
 277                 return err;
 278         }
 279
 280         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
 281                           rocker_test_irq_handler, 0,
 282                           rocker_driver_name, &wait);
 283         if (err) {
 284                 dev_err(&pdev->dev, "cannot assign test irq\n");
 285                 return err;
 286         }
 287
 288         rocker_wait_init(&wait);
 289         rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
 290
 291         if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
 292                 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
 293                 err = -EIO;
 294                 goto free_irq;
 295         }
 296
 297         err = rocker_dma_test(rocker, &wait);
 298         if (err)
 299                 dev_err(&pdev->dev, "dma test failed\n");
 300
 301 free_irq:
 302         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
 303         return err;
 304 }
 305
 306 /******************************************
 307  * DMA rings and descriptors manipulations
 308  ******************************************/
 309
 310 static u32 __pos_inc(u32 pos, size_t limit)
 311 {
 312         return ++pos == limit ? 0 : pos;
 313 }
 314
 315 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
 316 {
 317         int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 318
 319         switch (err) {
 320         case ROCKER_OK:
 321                 return 0;
 322         case -ROCKER_ENOENT:
 323                 return -ENOENT;
 324         case -ROCKER_ENXIO:
 325                 return -ENXIO;
 326         case -ROCKER_ENOMEM:
 327                 return -ENOMEM;
 328         case -ROCKER_EEXIST:
 329                 return -EEXIST;
 330         case -ROCKER_EINVAL:
 331                 return -EINVAL;
 332         case -ROCKER_EMSGSIZE:
 333                 return -EMSGSIZE;
 334         case -ROCKER_ENOTSUP:
 335                 return -EOPNOTSUPP;
 336         case -ROCKER_ENOBUFS:
 337                 return -ENOBUFS;
 338         }
 339
 340         return -EINVAL;
 341 }
 342
 343 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
 344 {
 345         desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 346 }
 347
 348 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
 349 {
 350         u32 comp_err = desc_info->desc->comp_err;
 351
 352         return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
 353 }
 354
 355 static void *
 356 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
 357 {
 358         return (void *)(uintptr_t)desc_info->desc->cookie;
 359 }
 360
 361 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
 362                                        void *ptr)
 363 {
 364         desc_info->desc->cookie = (uintptr_t) ptr;
 365 }
 366
 367 static struct rocker_desc_info *
 368 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
 369 {
 370         struct rocker_desc_info *desc_info;
 371         u32 head = __pos_inc(info->head, info->size);
 372
 373         desc_info = &info->desc_info[info->head];
 374         if (head == info->tail)
 375                 return NULL; /* ring full */
 376         desc_info->tlv_size = 0;
 377         return desc_info;
 378 }
 379
 380 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
 381 {
 382         desc_info->desc->buf_size = desc_info->data_size;
 383         desc_info->desc->tlv_size = desc_info->tlv_size;
 384 }
 385
 386 static void rocker_desc_head_set(const struct rocker *rocker,
 387                                  struct rocker_dma_ring_info *info,
 388                                  const struct rocker_desc_info *desc_info)
 389 {
 390         u32 head = __pos_inc(info->head, info->size);
 391
 392         BUG_ON(head == info->tail);
 393         rocker_desc_commit(desc_info);
 394         info->head = head;
 395         rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
 396 }
 397
 398 static struct rocker_desc_info *
 399 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
 400 {
 401         struct rocker_desc_info *desc_info;
 402
 403         if (info->tail == info->head)
 404                 return NULL; /* nothing to be done between head and tail */
 405         desc_info = &info->desc_info[info->tail];
 406         if (!rocker_desc_gen(desc_info))
 407                 return NULL; /* gen bit not set, desc is not ready yet */
 408         info->tail = __pos_inc(info->tail, info->size);
 409         desc_info->tlv_size = desc_info->desc->tlv_size;
 410         return desc_info;
 411 }
 412
 413 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
 414                                         const struct rocker_dma_ring_info *info,
 415                                         u32 credits)
 416 {
 417         if (credits)
 418                 rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
 419 }
 420
 421 static unsigned long rocker_dma_ring_size_fix(size_t size)
 422 {
 423         return max(ROCKER_DMA_SIZE_MIN,
 424                    min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
 425 }
 426
 427 static int rocker_dma_ring_create(const struct rocker *rocker,
 428                                   unsigned int type,
 429                                   size_t size,
 430                                   struct rocker_dma_ring_info *info)
 431 {
 432         int i;
 433
 434         BUG_ON(size != rocker_dma_ring_size_fix(size));
 435         info->size = size;
 436         info->type = type;
 437         info->head = 0;
 438         info->tail = 0;
 439         info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
 440                                   GFP_KERNEL);
 441         if (!info->desc_info)
 442                 return -ENOMEM;
 443
 444         info->desc = dma_alloc_coherent(&rocker->pdev->dev,
 445                                         info->size * sizeof(*info->desc),
 446                                         &info->mapaddr, GFP_KERNEL);
 447         if (!info->desc) {
 448                 kfree(info->desc_info);
 449                 return -ENOMEM;
 450         }
 451
 452         for (i = 0; i < info->size; i++)
 453                 info->desc_info[i].desc = &info->desc[i];
 454
 455         rocker_write32(rocker, DMA_DESC_CTRL(info->type),
 456                        ROCKER_DMA_DESC_CTRL_RESET);
 457         rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
 458         rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
 459
 460         return 0;
 461 }
 462
 463 static void rocker_dma_ring_destroy(const struct rocker *rocker,
 464                                     const struct rocker_dma_ring_info *info)
 465 {
 466         rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
 467
 468         dma_free_coherent(&rocker->pdev->dev,
 469                           info->size * sizeof(struct rocker_desc), info->desc,
 470                           info->mapaddr);
 471         kfree(info->desc_info);
 472 }
 473
 474 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
 475                                              struct rocker_dma_ring_info *info)
 476 {
 477         int i;
 478
 479         BUG_ON(info->head || info->tail);
 480
 481         /* When ring is consumer, we need to advance head for each desc.
 482          * That tells hw that the desc is ready to be used by it.
 483          */
 484         for (i = 0; i < info->size - 1; i++)
 485                 rocker_desc_head_set(rocker, info, &info->desc_info[i]);
 486         rocker_desc_commit(&info->desc_info[i]);
 487 }
 488
 489 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
 490                                       const struct rocker_dma_ring_info *info,
 491                                       int direction, size_t buf_size)
 492 {
 493         struct pci_dev *pdev = rocker->pdev;
 494         int i;
 495         int err;
 496
 497         for (i = 0; i < info->size; i++) {
 498                 struct rocker_desc_info *desc_info = &info->desc_info[i];
 499                 struct rocker_desc *desc = &info->desc[i];
 500                 dma_addr_t dma_handle;
 501                 char *buf;
 502
 503                 buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
 504                 if (!buf) {
 505                         err = -ENOMEM;
 506                         goto rollback;
 507                 }
 508
 509                 dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
 510                                             direction);
 511                 if (dma_mapping_error(&pdev->dev, dma_handle)) {
 512                         kfree(buf);
 513                         err = -EIO;
 514                         goto rollback;
 515                 }
 516
 517                 desc_info->data = buf;
 518                 desc_info->data_size = buf_size;
 519                 dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
 520
 521                 desc->buf_addr = dma_handle;
 522                 desc->buf_size = buf_size;
 523         }
 524         return 0;
 525
 526 rollback:
 527         for (i--; i >= 0; i--) {
 528                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 529
 530                 dma_unmap_single(&pdev->dev,
 531                                  dma_unmap_addr(desc_info, mapaddr),
 532                                  desc_info->data_size, direction);
 533                 kfree(desc_info->data);
 534         }
 535         return err;
 536 }
 537
 538 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
 539                                       const struct rocker_dma_ring_info *info,
 540                                       int direction)
 541 {
 542         struct pci_dev *pdev = rocker->pdev;
 543         int i;
 544
 545         for (i = 0; i < info->size; i++) {
 546                 const struct rocker_desc_info *desc_info = &info->desc_info[i];
 547                 struct rocker_desc *desc = &info->desc[i];
 548
 549                 desc->buf_addr = 0;
 550                 desc->buf_size = 0;
 551                 dma_unmap_single(&pdev->dev,
 552                                  dma_unmap_addr(desc_info, mapaddr),
 553                                  desc_info->data_size, direction);
 554                 kfree(desc_info->data);
 555         }
 556 }
 557
 558 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
 559 {
 560         struct rocker_wait *wait;
 561
 562         wait = rocker_wait_create();
 563         if (!wait)
 564                 return -ENOMEM;
 565         rocker_desc_cookie_ptr_set(desc_info, wait);
 566         return 0;
 567 }
 568
 569 static void
 570 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
 571 {
 572         struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
 573
 574         rocker_wait_destroy(wait);
 575 }
 576
 577 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
 578 {
 579         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 580         int i;
 581         int err;
 582
 583         for (i = 0; i < cmd_ring->size; i++) {
 584                 err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
 585                 if (err)
 586                         goto rollback;
 587         }
 588         return 0;
 589
 590 rollback:
 591         for (i--; i >= 0; i--)
 592                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 593         return err;
 594 }
 595
 596 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
 597 {
 598         const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
 599         int i;
 600
 601         for (i = 0; i < cmd_ring->size; i++)
 602                 rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 603 }
 604
 605 static int rocker_dma_rings_init(struct rocker *rocker)
 606 {
 607         const struct pci_dev *pdev = rocker->pdev;
 608         int err;
 609
 610         err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
 611                                      ROCKER_DMA_CMD_DEFAULT_SIZE,
 612                                      &rocker->cmd_ring);
 613         if (err) {
 614                 dev_err(&pdev->dev, "failed to create command dma ring\n");
 615                 return err;
 616         }
 617
 618         spin_lock_init(&rocker->cmd_ring_lock);
 619
 620         err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
 621                                          DMA_BIDIRECTIONAL, PAGE_SIZE);
 622         if (err) {
 623                 dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
 624                 goto err_dma_cmd_ring_bufs_alloc;
 625         }
 626
 627         err = rocker_dma_cmd_ring_waits_alloc(rocker);
 628         if (err) {
 629                 dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
 630                 goto err_dma_cmd_ring_waits_alloc;
 631         }
 632
 633         err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
 634                                      ROCKER_DMA_EVENT_DEFAULT_SIZE,
 635                                      &rocker->event_ring);
 636         if (err) {
 637                 dev_err(&pdev->dev, "failed to create event dma ring\n");
 638                 goto err_dma_event_ring_create;
 639         }
 640
 641         err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
 642                                          DMA_FROM_DEVICE, PAGE_SIZE);
 643         if (err) {
 644                 dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
 645                 goto err_dma_event_ring_bufs_alloc;
 646         }
 647         rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
 648         return 0;
 649
 650 err_dma_event_ring_bufs_alloc:
 651         rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 652 err_dma_event_ring_create:
 653         rocker_dma_cmd_ring_waits_free(rocker);
 654 err_dma_cmd_ring_waits_alloc:
 655         rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
 656                                   DMA_BIDIRECTIONAL);
 657 err_dma_cmd_ring_bufs_alloc:
 658         rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 659         return err;
 660 }
 661
 662 static void rocker_dma_rings_fini(struct rocker *rocker)
 663 {
 664         rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
 665                                   DMA_BIDIRECTIONAL);
 666         rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 667         rocker_dma_cmd_ring_waits_free(rocker);
 668         rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
 669                                   DMA_BIDIRECTIONAL);
 670         rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 671 }
 672
 673 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
 674                                       struct rocker_desc_info *desc_info,
 675                                       struct sk_buff *skb, size_t buf_len)
 676 {
 677         const struct rocker *rocker = rocker_port->rocker;
 678         struct pci_dev *pdev = rocker->pdev;
 679         dma_addr_t dma_handle;
 680
 681         dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
 682                                     DMA_FROM_DEVICE);
 683         if (dma_mapping_error(&pdev->dev, dma_handle))
 684                 return -EIO;
 685         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
 686                 goto tlv_put_failure;
 687         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
 688                 goto tlv_put_failure;
 689         return 0;
 690
 691 tlv_put_failure:
 692         dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
 693         desc_info->tlv_size = 0;
 694         return -EMSGSIZE;
 695 }
 696
 697 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
 698 {
 699         return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 700 }
 701
 702 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
 703                                         struct rocker_desc_info *desc_info)
 704 {
 705         struct net_device *dev = rocker_port->dev;
 706         struct sk_buff *skb;
 707         size_t buf_len = rocker_port_rx_buf_len(rocker_port);
 708         int err;
 709
 710         /* Ensure that hw will see tlv_size zero in case of an error.
 711          * That tells hw to use another descriptor.
 712          */
 713         rocker_desc_cookie_ptr_set(desc_info, NULL);
 714         desc_info->tlv_size = 0;
 715
 716         skb = netdev_alloc_skb_ip_align(dev, buf_len);
 717         if (!skb)
 718                 return -ENOMEM;
 719         err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
 720         if (err) {
 721                 dev_kfree_skb_any(skb);
 722                 return err;
 723         }
 724         rocker_desc_cookie_ptr_set(desc_info, skb);
 725         return 0;
 726 }
 727
 728 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
 729                                          const struct rocker_tlv **attrs)
 730 {
 731         struct pci_dev *pdev = rocker->pdev;
 732         dma_addr_t dma_handle;
 733         size_t len;
 734
 735         if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
 736             !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
 737                 return;
 738         dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
 739         len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
 740         dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
 741 }
 742
 743 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
 744                                         const struct rocker_desc_info *desc_info)
 745 {
 746         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
 747         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
 748
 749         if (!skb)
 750                 return;
 751         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
 752         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
 753         dev_kfree_skb_any(skb);
 754 }
 755
 756 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
 757 {
 758         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 759         const struct rocker *rocker = rocker_port->rocker;
 760         int i;
 761         int err;
 762
 763         for (i = 0; i < rx_ring->size; i++) {
 764                 err = rocker_dma_rx_ring_skb_alloc(rocker_port,
 765                                                    &rx_ring->desc_info[i]);
 766                 if (err)
 767                         goto rollback;
 768         }
 769         return 0;
 770
 771 rollback:
 772         for (i--; i >= 0; i--)
 773                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 774         return err;
 775 }
 776
 777 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
 778 {
 779         const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
 780         const struct rocker *rocker = rocker_port->rocker;
 781         int i;
 782
 783         for (i = 0; i < rx_ring->size; i++)
 784                 rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 785 }
 786
 787 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
 788 {
 789         struct rocker *rocker = rocker_port->rocker;
 790         int err;
 791
 792         err = rocker_dma_ring_create(rocker,
 793                                      ROCKER_DMA_TX(rocker_port->port_number),
 794                                      ROCKER_DMA_TX_DEFAULT_SIZE,
 795                                      &rocker_port->tx_ring);
 796         if (err) {
 797                 netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
 798                 return err;
 799         }
 800
 801         err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
 802                                          DMA_TO_DEVICE,
 803                                          ROCKER_DMA_TX_DESC_SIZE);
 804         if (err) {
 805                 netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
 806                 goto err_dma_tx_ring_bufs_alloc;
 807         }
 808
 809         err = rocker_dma_ring_create(rocker,
 810                                      ROCKER_DMA_RX(rocker_port->port_number),
 811                                      ROCKER_DMA_RX_DEFAULT_SIZE,
 812                                      &rocker_port->rx_ring);
 813         if (err) {
 814                 netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
 815                 goto err_dma_rx_ring_create;
 816         }
 817
 818         err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
 819                                          DMA_BIDIRECTIONAL,
 820                                          ROCKER_DMA_RX_DESC_SIZE);
 821         if (err) {
 822                 netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
 823                 goto err_dma_rx_ring_bufs_alloc;
 824         }
 825
 826         err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
 827         if (err) {
 828                 netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
 829                 goto err_dma_rx_ring_skbs_alloc;
 830         }
 831         rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
 832
 833         return 0;
 834
 835 err_dma_rx_ring_skbs_alloc:
 836         rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
 837                                   DMA_BIDIRECTIONAL);
 838 err_dma_rx_ring_bufs_alloc:
 839         rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 840 err_dma_rx_ring_create:
 841         rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
 842                                   DMA_TO_DEVICE);
 843 err_dma_tx_ring_bufs_alloc:
 844         rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 845         return err;
 846 }
 847
 848 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
 849 {
 850         struct rocker *rocker = rocker_port->rocker;
 851
 852         rocker_dma_rx_ring_skbs_free(rocker_port);
 853         rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
 854                                   DMA_BIDIRECTIONAL);
 855         rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 856         rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
 857                                   DMA_TO_DEVICE);
 858         rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 859 }
 860
 861 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
 862                                    bool enable)
 863 {
 864         u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
 865
 866         if (enable)
 867                 val |= 1ULL << rocker_port->pport;
 868         else
 869                 val &= ~(1ULL << rocker_port->pport);
 870         rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
 871 }
 872
 873 /********************************
 874  * Interrupt handler and helpers
 875  ********************************/
 876
 877 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
 878 {
 879         struct rocker *rocker = dev_id;
 880         const struct rocker_desc_info *desc_info;
 881         struct rocker_wait *wait;
 882         u32 credits = 0;
 883
 884         spin_lock(&rocker->cmd_ring_lock);
 885         while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
 886                 wait = rocker_desc_cookie_ptr_get(desc_info);
 887                 if (wait->nowait) {
 888                         rocker_desc_gen_clear(desc_info);
 889                 } else {
 890                         rocker_wait_wake_up(wait);
 891                 }
 892                 credits++;
 893         }
 894         spin_unlock(&rocker->cmd_ring_lock);
 895         rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
 896
 897         return IRQ_HANDLED;
 898 }
 899
 900 static void rocker_port_link_up(const struct rocker_port *rocker_port)
 901 {
 902         netif_carrier_on(rocker_port->dev);
 903         netdev_info(rocker_port->dev, "Link is up\n");
 904 }
 905
 906 static void rocker_port_link_down(const struct rocker_port *rocker_port)
 907 {
 908         netif_carrier_off(rocker_port->dev);
 909         netdev_info(rocker_port->dev, "Link is down\n");
 910 }
 911
 912 static int rocker_event_link_change(const struct rocker *rocker,
 913                                     const struct rocker_tlv *info)
 914 {
 915         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
 916         unsigned int port_number;
 917         bool link_up;
 918         struct rocker_port *rocker_port;
 919
 920         rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
 921         if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
 922             !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
 923                 return -EIO;
 924         port_number =
 925                 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
 926         link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
 927
 928         if (port_number >= rocker->port_count)
 929                 return -EINVAL;
 930
 931         rocker_port = rocker->ports[port_number];
 932         if (netif_carrier_ok(rocker_port->dev) != link_up) {
 933                 if (link_up)
 934                         rocker_port_link_up(rocker_port);
 935                 else
 936                         rocker_port_link_down(rocker_port);
 937         }
 938
 939         return 0;
 940 }
 941
 942 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
 943                                               const unsigned char *addr,
 944                                               __be16 vlan_id);
 945
 946 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
 947                                       const struct rocker_tlv *info)
 948 {
 949         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
 950         unsigned int port_number;
 951         struct rocker_port *rocker_port;
 952         const unsigned char *addr;
 953         __be16 vlan_id;
 954
 955         rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
 956         if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
 957             !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
 958             !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
 959                 return -EIO;
 960         port_number =
 961                 rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
 962         addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
 963         vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
 964
 965         if (port_number >= rocker->port_count)
 966                 return -EINVAL;
 967
 968         rocker_port = rocker->ports[port_number];
 969         return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
 970 }
 971
 972 static int rocker_event_process(const struct rocker *rocker,
 973                                 const struct rocker_desc_info *desc_info)
 974 {
 975         const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
 976         const struct rocker_tlv *info;
 977         u16 type;
 978
 979         rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
 980         if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
 981             !attrs[ROCKER_TLV_EVENT_INFO])
 982                 return -EIO;
 983
 984         type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
 985         info = attrs[ROCKER_TLV_EVENT_INFO];
 986
 987         switch (type) {
 988         case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
 989                 return rocker_event_link_change(rocker, info);
 990         case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
 991                 return rocker_event_mac_vlan_seen(rocker, info);
 992         }
 993
 994         return -EOPNOTSUPP;
 995 }
 996
 997 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
 998 {
 999         struct rocker *rocker = dev_id;
1000         const struct pci_dev *pdev = rocker->pdev;
1001         const struct rocker_desc_info *desc_info;
1002         u32 credits = 0;
1003         int err;
1004
1005         while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
1006                 err = rocker_desc_err(desc_info);
1007                 if (err) {
1008                         dev_err(&pdev->dev, "event desc received with err %d\n",
1009                                 err);
1010                 } else {
1011                         err = rocker_event_process(rocker, desc_info);
1012                         if (err)
1013                                 dev_err(&pdev->dev, "event processing failed with err %d\n",
1014                                         err);
1015                 }
1016                 rocker_desc_gen_clear(desc_info);
1017                 rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
1018                 credits++;
1019         }
1020         rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
1021
1022         return IRQ_HANDLED;
1023 }
1024
1025 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
1026 {
1027         struct rocker_port *rocker_port = dev_id;
1028
1029         napi_schedule(&rocker_port->napi_tx);
1030         return IRQ_HANDLED;
1031 }
1032
1033 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
1034 {
1035         struct rocker_port *rocker_port = dev_id;
1036
1037         napi_schedule(&rocker_port->napi_rx);
1038         return IRQ_HANDLED;
1039 }
1040
1041 /********************
1042  * Command interface
1043  ********************/
1044
1045 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
1046                     rocker_cmd_prep_cb_t prepare, void *prepare_priv,
1047                     rocker_cmd_proc_cb_t process, void *process_priv)
1048 {
1049         struct rocker *rocker = rocker_port->rocker;
1050         struct rocker_desc_info *desc_info;
1051         struct rocker_wait *wait;
1052         unsigned long lock_flags;
1053         int err;
1054
1055         spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
1056
1057         desc_info = rocker_desc_head_get(&rocker->cmd_ring);
1058         if (!desc_info) {
1059                 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1060                 return -EAGAIN;
1061         }
1062
1063         wait = rocker_desc_cookie_ptr_get(desc_info);
1064         rocker_wait_init(wait);
1065         wait->nowait = nowait;
1066
1067         err = prepare(rocker_port, desc_info, prepare_priv);
1068         if (err) {
1069                 spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1070                 return err;
1071         }
1072
1073         rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
1074
1075         spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
1076
1077         if (nowait)
1078                 return 0;
1079
1080         if (!rocker_wait_event_timeout(wait, HZ / 10))
1081                 return -EIO;
1082
1083         err = rocker_desc_err(desc_info);
1084         if (err)
1085                 return err;
1086
1087         if (process)
1088                 err = process(rocker_port, desc_info, process_priv);
1089
1090         rocker_desc_gen_clear(desc_info);
1091         return err;
1092 }
1093
1094 static int
1095 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
1096                                   struct rocker_desc_info *desc_info,
1097                                   void *priv)
1098 {
1099         struct rocker_tlv *cmd_info;
1100
1101         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1102                                ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
1103                 return -EMSGSIZE;
1104         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1105         if (!cmd_info)
1106                 return -EMSGSIZE;
1107         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1108                                rocker_port->pport))
1109                 return -EMSGSIZE;
1110         rocker_tlv_nest_end(desc_info, cmd_info);
1111         return 0;
1112 }
1113
1114 static int
1115 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
1116                                           const struct rocker_desc_info *desc_info,
1117                                           void *priv)
1118 {
1119         struct ethtool_link_ksettings *ecmd = priv;
1120         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1121         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1122         u32 speed;
1123         u8 duplex;
1124         u8 autoneg;
1125
1126         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1127         if (!attrs[ROCKER_TLV_CMD_INFO])
1128                 return -EIO;
1129
1130         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1131                                 attrs[ROCKER_TLV_CMD_INFO]);
1132         if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
1133             !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
1134             !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
1135                 return -EIO;
1136
1137         speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
1138         duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
1139         autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
1140
1141         ethtool_link_ksettings_zero_link_mode(ecmd, supported);
1142         ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
1143
1144         ecmd->base.phy_address = 0xff;
1145         ecmd->base.port = PORT_TP;
1146         ecmd->base.speed = speed;
1147         ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
1148         ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1149
1150         return 0;
1151 }
1152
1153 static int
1154 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
1155                                           const struct rocker_desc_info *desc_info,
1156                                           void *priv)
1157 {
1158         unsigned char *macaddr = priv;
1159         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1160         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1161         const struct rocker_tlv *attr;
1162
1163         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1164         if (!attrs[ROCKER_TLV_CMD_INFO])
1165                 return -EIO;
1166
1167         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1168                                 attrs[ROCKER_TLV_CMD_INFO]);
1169         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
1170         if (!attr)
1171                 return -EIO;
1172
1173         if (rocker_tlv_len(attr) != ETH_ALEN)
1174                 return -EINVAL;
1175
1176         ether_addr_copy(macaddr, rocker_tlv_data(attr));
1177         return 0;
1178 }
1179
1180 static int
1181 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
1182                                        const struct rocker_desc_info *desc_info,
1183                                        void *priv)
1184 {
1185         u8 *p_mode = priv;
1186         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1187         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1188         const struct rocker_tlv *attr;
1189
1190         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1191         if (!attrs[ROCKER_TLV_CMD_INFO])
1192                 return -EIO;
1193
1194         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1195                                 attrs[ROCKER_TLV_CMD_INFO]);
1196         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
1197         if (!attr)
1198                 return -EIO;
1199
1200         *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
1201         return 0;
1202 }
1203
1204 struct port_name {
1205         char *buf;
1206         size_t len;
1207 };
1208
1209 static int
1210 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
1211                                             const struct rocker_desc_info *desc_info,
1212                                             void *priv)
1213 {
1214         const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
1215         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
1216         struct port_name *name = priv;
1217         const struct rocker_tlv *attr;
1218         size_t i, j, len;
1219         const char *str;
1220
1221         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
1222         if (!attrs[ROCKER_TLV_CMD_INFO])
1223                 return -EIO;
1224
1225         rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
1226                                 attrs[ROCKER_TLV_CMD_INFO]);
1227         attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
1228         if (!attr)
1229                 return -EIO;
1230
1231         len = min_t(size_t, rocker_tlv_len(attr), name->len);
1232         str = rocker_tlv_data(attr);
1233
1234         /* make sure name only contains alphanumeric characters */
1235         for (i = j = 0; i < len; ++i) {
1236                 if (isalnum(str[i])) {
1237                         name->buf[j] = str[i];
1238                         j++;
1239                 }
1240         }
1241
1242         if (j == 0)
1243                 return -EIO;
1244
1245         name->buf[j] = '\0';
1246
1247         return 0;
1248 }
1249
1250 static int
1251 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
1252                                           struct rocker_desc_info *desc_info,
1253                                           void *priv)
1254 {
1255         struct ethtool_link_ksettings *ecmd = priv;
1256         struct rocker_tlv *cmd_info;
1257
1258         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1259                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1260                 return -EMSGSIZE;
1261         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1262         if (!cmd_info)
1263                 return -EMSGSIZE;
1264         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1265                                rocker_port->pport))
1266                 return -EMSGSIZE;
1267         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
1268                                ecmd->base.speed))
1269                 return -EMSGSIZE;
1270         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
1271                               ecmd->base.duplex))
1272                 return -EMSGSIZE;
1273         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
1274                               ecmd->base.autoneg))
1275                 return -EMSGSIZE;
1276         rocker_tlv_nest_end(desc_info, cmd_info);
1277         return 0;
1278 }
1279
1280 static int
1281 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
1282                                           struct rocker_desc_info *desc_info,
1283                                           void *priv)
1284 {
1285         const unsigned char *macaddr = priv;
1286         struct rocker_tlv *cmd_info;
1287
1288         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1289                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1290                 return -EMSGSIZE;
1291         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1292         if (!cmd_info)
1293                 return -EMSGSIZE;
1294         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1295                                rocker_port->pport))
1296                 return -EMSGSIZE;
1297         if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
1298                            ETH_ALEN, macaddr))
1299                 return -EMSGSIZE;
1300         rocker_tlv_nest_end(desc_info, cmd_info);
1301         return 0;
1302 }
1303
1304 static int
1305 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
1306                                       struct rocker_desc_info *desc_info,
1307                                       void *priv)
1308 {
1309         int mtu = *(int *)priv;
1310         struct rocker_tlv *cmd_info;
1311
1312         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1313                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1314                 return -EMSGSIZE;
1315         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1316         if (!cmd_info)
1317                 return -EMSGSIZE;
1318         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1319                                rocker_port->pport))
1320                 return -EMSGSIZE;
1321         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
1322                                mtu))
1323                 return -EMSGSIZE;
1324         rocker_tlv_nest_end(desc_info, cmd_info);
1325         return 0;
1326 }
1327
1328 static int
1329 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
1330                                   struct rocker_desc_info *desc_info,
1331                                   void *priv)
1332 {
1333         bool learning = *(bool *)priv;
1334         struct rocker_tlv *cmd_info;
1335
1336         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
1337                                ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
1338                 return -EMSGSIZE;
1339         cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
1340         if (!cmd_info)
1341                 return -EMSGSIZE;
1342         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
1343                                rocker_port->pport))
1344                 return -EMSGSIZE;
1345         if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
1346                               learning))
1347                 return -EMSGSIZE;
1348         rocker_tlv_nest_end(desc_info, cmd_info);
1349         return 0;
1350 }
1351
1352 static int
1353 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
1354                                      struct ethtool_link_ksettings *ecmd)
1355 {
1356         return rocker_cmd_exec(rocker_port, false,
1357                                rocker_cmd_get_port_settings_prep, NULL,
1358                                rocker_cmd_get_port_settings_ethtool_proc,
1359                                ecmd);
1360 }
1361
1362 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
1363                                                 unsigned char *macaddr)
1364 {
1365         return rocker_cmd_exec(rocker_port, false,
1366                                rocker_cmd_get_port_settings_prep, NULL,
1367                                rocker_cmd_get_port_settings_macaddr_proc,
1368                                macaddr);
1369 }
1370
1371 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
1372                                              u8 *p_mode)
1373 {
1374         return rocker_cmd_exec(rocker_port, false,
1375                                rocker_cmd_get_port_settings_prep, NULL,
1376                                rocker_cmd_get_port_settings_mode_proc, p_mode);
1377 }
1378
1379 static int
1380 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
1381                                      const struct ethtool_link_ksettings *ecmd)
1382 {
1383         struct ethtool_link_ksettings copy_ecmd;
1384
1385         memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
1386
1387         return rocker_cmd_exec(rocker_port, false,
1388                                rocker_cmd_set_port_settings_ethtool_prep,
1389                                &copy_ecmd, NULL, NULL);
1390 }
1391
1392 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
1393                                                 unsigned char *macaddr)
1394 {
1395         return rocker_cmd_exec(rocker_port, false,
1396                                rocker_cmd_set_port_settings_macaddr_prep,
1397                                macaddr, NULL, NULL);
1398 }
1399
1400 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
1401                                             int mtu)
1402 {
1403         return rocker_cmd_exec(rocker_port, false,
1404                                rocker_cmd_set_port_settings_mtu_prep,
1405                                &mtu, NULL, NULL);
1406 }
1407
1408 int rocker_port_set_learning(struct rocker_port *rocker_port,
1409                              bool learning)
1410 {
1411         return rocker_cmd_exec(rocker_port, false,
1412                                rocker_cmd_set_port_learning_prep,
1413                                &learning, NULL, NULL);
1414 }
1415
1416 /**********************
1417  * Worlds manipulation
1418  **********************/
1419
1420 static struct rocker_world_ops *rocker_world_ops[] = {
1421         &rocker_ofdpa_ops,
1422 };
1423
1424 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
1425
1426 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
1427 {
1428         int i;
1429
1430         for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
1431                 if (rocker_world_ops[i]->mode == mode)
1432                         return rocker_world_ops[i];
1433         return NULL;
1434 }
1435
1436 static int rocker_world_init(struct rocker *rocker, u8 mode)
1437 {
1438         struct rocker_world_ops *wops;
1439         int err;
1440
1441         wops = rocker_world_ops_find(mode);
1442         if (!wops) {
1443                 dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
1444                         mode);
1445                 return -EINVAL;
1446         }
1447         rocker->wops = wops;
1448         rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
1449         if (!rocker->wpriv)
1450                 return -ENOMEM;
1451         if (!wops->init)
1452                 return 0;
1453         err = wops->init(rocker);
1454         if (err)
1455                 kfree(rocker->wpriv);
1456         return err;
1457 }
1458
1459 static void rocker_world_fini(struct rocker *rocker)
1460 {
1461         struct rocker_world_ops *wops = rocker->wops;
1462
1463         if (!wops || !wops->fini)
1464                 return;
1465         wops->fini(rocker);
1466         kfree(rocker->wpriv);
1467 }
1468
1469 static int rocker_world_check_init(struct rocker_port *rocker_port)
1470 {
1471         struct rocker *rocker = rocker_port->rocker;
1472         u8 mode;
1473         int err;
1474
1475         err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
1476         if (err) {
1477                 dev_err(&rocker->pdev->dev, "failed to get port mode\n");
1478                 return err;
1479         }
1480         if (rocker->wops) {
1481                 if (rocker->wops->mode != mode) {
1482                         dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
1483                         return -EINVAL;
1484                 }
1485                 return 0;
1486         }
1487         return rocker_world_init(rocker, mode);
1488 }
1489
1490 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
1491 {
1492         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1493         int err;
1494
1495         rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
1496         if (!rocker_port->wpriv)
1497                 return -ENOMEM;
1498         if (!wops->port_pre_init)
1499                 return 0;
1500         err = wops->port_pre_init(rocker_port);
1501         if (err)
1502                 kfree(rocker_port->wpriv);
1503         return 0;
1504 }
1505
1506 static int rocker_world_port_init(struct rocker_port *rocker_port)
1507 {
1508         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1509
1510         if (!wops->port_init)
1511                 return 0;
1512         return wops->port_init(rocker_port);
1513 }
1514
1515 static void rocker_world_port_fini(struct rocker_port *rocker_port)
1516 {
1517         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1518
1519         if (!wops->port_fini)
1520                 return;
1521         wops->port_fini(rocker_port);
1522 }
1523
1524 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
1525 {
1526         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1527
1528         if (!wops->port_post_fini)
1529                 return;
1530         wops->port_post_fini(rocker_port);
1531         kfree(rocker_port->wpriv);
1532 }
1533
1534 static int rocker_world_port_open(struct rocker_port *rocker_port)
1535 {
1536         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1537
1538         if (!wops->port_open)
1539                 return 0;
1540         return wops->port_open(rocker_port);
1541 }
1542
1543 static void rocker_world_port_stop(struct rocker_port *rocker_port)
1544 {
1545         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1546
1547         if (!wops->port_stop)
1548                 return;
1549         wops->port_stop(rocker_port);
1550 }
1551
1552 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
1553                                                 u8 state)
1554 {
1555         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1556
1557         if (!wops->port_attr_stp_state_set)
1558                 return -EOPNOTSUPP;
1559
1560         return wops->port_attr_stp_state_set(rocker_port, state);
1561 }
1562
1563 static int
1564 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
1565                                                 rocker_port,
1566                                                 unsigned long *
1567                                                 p_brport_flags_support)
1568 {
1569         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1570
1571         if (!wops->port_attr_bridge_flags_support_get)
1572                 return -EOPNOTSUPP;
1573         return wops->port_attr_bridge_flags_support_get(rocker_port,
1574                                                         p_brport_flags_support);
1575 }
1576
1577 static int
1578 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
1579                                             struct switchdev_brport_flags flags)
1580 {
1581         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1582         unsigned long brport_flags_s;
1583         int err;
1584
1585         if (!wops->port_attr_bridge_flags_set)
1586                 return -EOPNOTSUPP;
1587
1588         err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
1589                                                               &brport_flags_s);
1590         if (err)
1591                 return err;
1592
1593         if (flags.mask & ~brport_flags_s)
1594                 return -EINVAL;
1595
1596         return 0;
1597 }
1598
1599 static int
1600 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
1601                                         struct switchdev_brport_flags flags)
1602 {
1603         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1604
1605         if (!wops->port_attr_bridge_flags_set)
1606                 return -EOPNOTSUPP;
1607
1608         return wops->port_attr_bridge_flags_set(rocker_port, flags.val);
1609 }
1610
1611 static int
1612 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
1613                                               u32 ageing_time)
1614 {
1615         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1616
1617         if (!wops->port_attr_bridge_ageing_time_set)
1618                 return -EOPNOTSUPP;
1619
1620         return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time);
1621 }
1622
1623 static int
1624 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
1625                                const struct switchdev_obj_port_vlan *vlan)
1626 {
1627         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1628
1629         if (!wops->port_obj_vlan_add)
1630                 return -EOPNOTSUPP;
1631
1632         return wops->port_obj_vlan_add(rocker_port, vlan);
1633 }
1634
1635 static int
1636 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
1637                                const struct switchdev_obj_port_vlan *vlan)
1638 {
1639         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1640
1641         if (netif_is_bridge_master(vlan->obj.orig_dev))
1642                 return -EOPNOTSUPP;
1643
1644         if (!wops->port_obj_vlan_del)
1645                 return -EOPNOTSUPP;
1646         return wops->port_obj_vlan_del(rocker_port, vlan);
1647 }
1648
1649 static int
1650 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
1651                           struct switchdev_notifier_fdb_info *info)
1652 {
1653         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1654
1655         if (!wops->port_obj_fdb_add)
1656                 return -EOPNOTSUPP;
1657
1658         return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
1659 }
1660
1661 static int
1662 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
1663                           struct switchdev_notifier_fdb_info *info)
1664 {
1665         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1666
1667         if (!wops->port_obj_fdb_del)
1668                 return -EOPNOTSUPP;
1669         return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
1670 }
1671
1672 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
1673                                            struct net_device *master)
1674 {
1675         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1676
1677         if (!wops->port_master_linked)
1678                 return -EOPNOTSUPP;
1679         return wops->port_master_linked(rocker_port, master);
1680 }
1681
1682 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1683                                              struct net_device *master)
1684 {
1685         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1686
1687         if (!wops->port_master_unlinked)
1688                 return -EOPNOTSUPP;
1689         return wops->port_master_unlinked(rocker_port, master);
1690 }
1691
1692 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1693                                           struct neighbour *n)
1694 {
1695         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1696
1697         if (!wops->port_neigh_update)
1698                 return -EOPNOTSUPP;
1699         return wops->port_neigh_update(rocker_port, n);
1700 }
1701
1702 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1703                                            struct neighbour *n)
1704 {
1705         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1706
1707         if (!wops->port_neigh_destroy)
1708                 return -EOPNOTSUPP;
1709         return wops->port_neigh_destroy(rocker_port, n);
1710 }
1711
1712 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1713                                               const unsigned char *addr,
1714                                               __be16 vlan_id)
1715 {
1716         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1717
1718         if (!wops->port_ev_mac_vlan_seen)
1719                 return -EOPNOTSUPP;
1720         return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1721 }
1722
1723 static int rocker_world_fib4_add(struct rocker *rocker,
1724                                  const struct fib_entry_notifier_info *fen_info)
1725 {
1726         struct rocker_world_ops *wops = rocker->wops;
1727
1728         if (!wops->fib4_add)
1729                 return 0;
1730         return wops->fib4_add(rocker, fen_info);
1731 }
1732
1733 static int rocker_world_fib4_del(struct rocker *rocker,
1734                                  const struct fib_entry_notifier_info *fen_info)
1735 {
1736         struct rocker_world_ops *wops = rocker->wops;
1737
1738         if (!wops->fib4_del)
1739                 return 0;
1740         return wops->fib4_del(rocker, fen_info);
1741 }
1742
1743 static void rocker_world_fib4_abort(struct rocker *rocker)
1744 {
1745         struct rocker_world_ops *wops = rocker->wops;
1746
1747         if (wops->fib4_abort)
1748                 wops->fib4_abort(rocker);
1749 }
1750
1751 /*****************
1752  * Net device ops
1753  *****************/
1754
1755 static int rocker_port_open(struct net_device *dev)
1756 {
1757         struct rocker_port *rocker_port = netdev_priv(dev);
1758         int err;
1759
1760         err = rocker_port_dma_rings_init(rocker_port);
1761         if (err)
1762                 return err;
1763
1764         err = request_irq(rocker_msix_tx_vector(rocker_port),
1765                           rocker_tx_irq_handler, 0,
1766                           rocker_driver_name, rocker_port);
1767         if (err) {
1768                 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1769                 goto err_request_tx_irq;
1770         }
1771
1772         err = request_irq(rocker_msix_rx_vector(rocker_port),
1773                           rocker_rx_irq_handler, 0,
1774                           rocker_driver_name, rocker_port);
1775         if (err) {
1776                 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1777                 goto err_request_rx_irq;
1778         }
1779
1780         err = rocker_world_port_open(rocker_port);
1781         if (err) {
1782                 netdev_err(rocker_port->dev, "cannot open port in world\n");
1783                 goto err_world_port_open;
1784         }
1785
1786         napi_enable(&rocker_port->napi_tx);
1787         napi_enable(&rocker_port->napi_rx);
1788         if (!dev->proto_down)
1789                 rocker_port_set_enable(rocker_port, true);
1790         netif_start_queue(dev);
1791         return 0;
1792
1793 err_world_port_open:
1794         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1795 err_request_rx_irq:
1796         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1797 err_request_tx_irq:
1798         rocker_port_dma_rings_fini(rocker_port);
1799         return err;
1800 }
1801
1802 static int rocker_port_stop(struct net_device *dev)
1803 {
1804         struct rocker_port *rocker_port = netdev_priv(dev);
1805
1806         netif_stop_queue(dev);
1807         rocker_port_set_enable(rocker_port, false);
1808         napi_disable(&rocker_port->napi_rx);
1809         napi_disable(&rocker_port->napi_tx);
1810         rocker_world_port_stop(rocker_port);
1811         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1812         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1813         rocker_port_dma_rings_fini(rocker_port);
1814
1815         return 0;
1816 }
1817
1818 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1819                                        const struct rocker_desc_info *desc_info)
1820 {
1821         const struct rocker *rocker = rocker_port->rocker;
1822         struct pci_dev *pdev = rocker->pdev;
1823         const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1824         struct rocker_tlv *attr;
1825         int rem;
1826
1827         rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1828         if (!attrs[ROCKER_TLV_TX_FRAGS])
1829                 return;
1830         rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1831                 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1832                 dma_addr_t dma_handle;
1833                 size_t len;
1834
1835                 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1836                         continue;
1837                 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1838                                         attr);
1839                 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1840                     !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1841                         continue;
1842                 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1843                 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1844                 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1845         }
1846 }
1847
1848 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1849                                        struct rocker_desc_info *desc_info,
1850                                        char *buf, size_t buf_len)
1851 {
1852         const struct rocker *rocker = rocker_port->rocker;
1853         struct pci_dev *pdev = rocker->pdev;
1854         dma_addr_t dma_handle;
1855         struct rocker_tlv *frag;
1856
1857         dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1858         if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1859                 if (net_ratelimit())
1860                         netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1861                 return -EIO;
1862         }
1863         frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1864         if (!frag)
1865                 goto unmap_frag;
1866         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1867                                dma_handle))
1868                 goto nest_cancel;
1869         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1870                                buf_len))
1871                 goto nest_cancel;
1872         rocker_tlv_nest_end(desc_info, frag);
1873         return 0;
1874
1875 nest_cancel:
1876         rocker_tlv_nest_cancel(desc_info, frag);
1877 unmap_frag:
1878         dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1879         return -EMSGSIZE;
1880 }
1881
1882 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1883 {
1884         struct rocker_port *rocker_port = netdev_priv(dev);
1885         struct rocker *rocker = rocker_port->rocker;
1886         struct rocker_desc_info *desc_info;
1887         struct rocker_tlv *frags;
1888         int i;
1889         int err;
1890
1891         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1892         if (unlikely(!desc_info)) {
1893                 if (net_ratelimit())
1894                         netdev_err(dev, "tx ring full when queue awake\n");
1895                 return NETDEV_TX_BUSY;
1896         }
1897
1898         rocker_desc_cookie_ptr_set(desc_info, skb);
1899
1900         frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1901         if (!frags)
1902                 goto out;
1903         err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1904                                           skb->data, skb_headlen(skb));
1905         if (err)
1906                 goto nest_cancel;
1907         if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1908                 err = skb_linearize(skb);
1909                 if (err)
1910                         goto unmap_frags;
1911         }
1912
1913         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1914                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1915
1916                 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1917                                                   skb_frag_address(frag),
1918                                                   skb_frag_size(frag));
1919                 if (err)
1920                         goto unmap_frags;
1921         }
1922         rocker_tlv_nest_end(desc_info, frags);
1923
1924         rocker_desc_gen_clear(desc_info);
1925         rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1926
1927         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1928         if (!desc_info)
1929                 netif_stop_queue(dev);
1930
1931         return NETDEV_TX_OK;
1932
1933 unmap_frags:
1934         rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1935 nest_cancel:
1936         rocker_tlv_nest_cancel(desc_info, frags);
1937 out:
1938         dev_kfree_skb(skb);
1939         dev->stats.tx_dropped++;
1940
1941         return NETDEV_TX_OK;
1942 }
1943
1944 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1945 {
1946         struct sockaddr *addr = p;
1947         struct rocker_port *rocker_port = netdev_priv(dev);
1948         int err;
1949
1950         if (!is_valid_ether_addr(addr->sa_data))
1951                 return -EADDRNOTAVAIL;
1952
1953         err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1954         if (err)
1955                 return err;
1956         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1957         return 0;
1958 }
1959
1960 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1961 {
1962         struct rocker_port *rocker_port = netdev_priv(dev);
1963         int running = netif_running(dev);
1964         int err;
1965
1966         if (running)
1967                 rocker_port_stop(dev);
1968
1969         netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1970         dev->mtu = new_mtu;
1971
1972         err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1973         if (err)
1974                 return err;
1975
1976         if (running)
1977                 err = rocker_port_open(dev);
1978
1979         return err;
1980 }
1981
1982 static int rocker_port_get_phys_port_name(struct net_device *dev,
1983                                           char *buf, size_t len)
1984 {
1985         struct rocker_port *rocker_port = netdev_priv(dev);
1986         struct port_name name = { .buf = buf, .len = len };
1987         int err;
1988
1989         err = rocker_cmd_exec(rocker_port, false,
1990                               rocker_cmd_get_port_settings_prep, NULL,
1991                               rocker_cmd_get_port_settings_phys_name_proc,
1992                               &name);
1993
1994         return err ? -EOPNOTSUPP : 0;
1995 }
1996
1997 static int rocker_port_change_proto_down(struct net_device *dev,
1998                                          bool proto_down)
1999 {
2000         struct rocker_port *rocker_port = netdev_priv(dev);
2001
2002         if (rocker_port->dev->flags & IFF_UP)
2003                 rocker_port_set_enable(rocker_port, !proto_down);
2004         rocker_port->dev->proto_down = proto_down;
2005         return 0;
2006 }
2007
2008 static void rocker_port_neigh_destroy(struct net_device *dev,
2009                                       struct neighbour *n)
2010 {
2011         struct rocker_port *rocker_port = netdev_priv(n->dev);
2012         int err;
2013
2014         err = rocker_world_port_neigh_destroy(rocker_port, n);
2015         if (err)
2016                 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2017                             err);
2018 }
2019
2020 static int rocker_port_get_port_parent_id(struct net_device *dev,
2021                                           struct netdev_phys_item_id *ppid)
2022 {
2023         const struct rocker_port *rocker_port = netdev_priv(dev);
2024         const struct rocker *rocker = rocker_port->rocker;
2025
2026         ppid->id_len = sizeof(rocker->hw.id);
2027         memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2028
2029         return 0;
2030 }
2031
2032 static const struct net_device_ops rocker_port_netdev_ops = {
2033         .ndo_open                       = rocker_port_open,
2034         .ndo_stop                       = rocker_port_stop,
2035         .ndo_start_xmit                 = rocker_port_xmit,
2036         .ndo_set_mac_address            = rocker_port_set_mac_address,
2037         .ndo_change_mtu                 = rocker_port_change_mtu,
2038         .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
2039         .ndo_change_proto_down          = rocker_port_change_proto_down,
2040         .ndo_neigh_destroy              = rocker_port_neigh_destroy,
2041         .ndo_get_port_parent_id         = rocker_port_get_port_parent_id,
2042 };
2043
2044 /********************
2045  * swdev interface
2046  ********************/
2047
2048 static int rocker_port_attr_set(struct net_device *dev,
2049                                 const struct switchdev_attr *attr)
2050 {
2051         struct rocker_port *rocker_port = netdev_priv(dev);
2052         int err = 0;
2053
2054         switch (attr->id) {
2055         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2056                 err = rocker_world_port_attr_stp_state_set(rocker_port,
2057                                                            attr->u.stp_state);
2058                 break;
2059         case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2060                 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2061                                                                   attr->u.brport_flags);
2062                 break;
2063         case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2064                 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2065                                                               attr->u.brport_flags);
2066                 break;
2067         case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2068                 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2069                                                                     attr->u.ageing_time);
2070                 break;
2071         default:
2072                 err = -EOPNOTSUPP;
2073                 break;
2074         }
2075
2076         return err;
2077 }
2078
2079 static int rocker_port_obj_add(struct net_device *dev,
2080                                const struct switchdev_obj *obj)
2081 {
2082         struct rocker_port *rocker_port = netdev_priv(dev);
2083         int err = 0;
2084
2085         switch (obj->id) {
2086         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2087                 err = rocker_world_port_obj_vlan_add(rocker_port,
2088                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2089                 break;
2090         default:
2091                 err = -EOPNOTSUPP;
2092                 break;
2093         }
2094
2095         return err;
2096 }
2097
2098 static int rocker_port_obj_del(struct net_device *dev,
2099                                const struct switchdev_obj *obj)
2100 {
2101         struct rocker_port *rocker_port = netdev_priv(dev);
2102         int err = 0;
2103
2104         switch (obj->id) {
2105         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2106                 err = rocker_world_port_obj_vlan_del(rocker_port,
2107                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2108                 break;
2109         default:
2110                 err = -EOPNOTSUPP;
2111                 break;
2112         }
2113
2114         return err;
2115 }
2116
2117 struct rocker_fib_event_work {
2118         struct work_struct work;
2119         union {
2120                 struct fib_entry_notifier_info fen_info;
2121                 struct fib_rule_notifier_info fr_info;
2122         };
2123         struct rocker *rocker;
2124         unsigned long event;
2125 };
2126
2127 static void rocker_router_fib_event_work(struct work_struct *work)
2128 {
2129         struct rocker_fib_event_work *fib_work =
2130                 container_of(work, struct rocker_fib_event_work, work);
2131         struct rocker *rocker = fib_work->rocker;
2132         struct fib_rule *rule;
2133         int err;
2134
2135         /* Protect internal structures from changes */
2136         rtnl_lock();
2137         switch (fib_work->event) {
2138         case FIB_EVENT_ENTRY_REPLACE:
2139                 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2140                 if (err)
2141                         rocker_world_fib4_abort(rocker);
2142                 fib_info_put(fib_work->fen_info.fi);
2143                 break;
2144         case FIB_EVENT_ENTRY_DEL:
2145                 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2146                 fib_info_put(fib_work->fen_info.fi);
2147                 break;
2148         case FIB_EVENT_RULE_ADD:
2149         case FIB_EVENT_RULE_DEL:
2150                 rule = fib_work->fr_info.rule;
2151                 if (!fib4_rule_default(rule))
2152                         rocker_world_fib4_abort(rocker);
2153                 fib_rule_put(rule);
2154                 break;
2155         }
2156         rtnl_unlock();
2157         kfree(fib_work);
2158 }
2159
2160 /* Called with rcu_read_lock() */
2161 static int rocker_router_fib_event(struct notifier_block *nb,
2162                                    unsigned long event, void *ptr)
2163 {
2164         struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2165         struct rocker_fib_event_work *fib_work;
2166         struct fib_notifier_info *info = ptr;
2167
2168         if (info->family != AF_INET)
2169                 return NOTIFY_DONE;
2170
2171         fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2172         if (WARN_ON(!fib_work))
2173                 return NOTIFY_BAD;
2174
2175         INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2176         fib_work->rocker = rocker;
2177         fib_work->event = event;
2178
2179         switch (event) {
2180         case FIB_EVENT_ENTRY_REPLACE:
2181         case FIB_EVENT_ENTRY_DEL:
2182                 if (info->family == AF_INET) {
2183                         struct fib_entry_notifier_info *fen_info = ptr;
2184
2185                         if (fen_info->fi->fib_nh_is_v6) {
2186                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2187                                 kfree(fib_work);
2188                                 return notifier_from_errno(-EINVAL);
2189                         }
2190                         if (fen_info->fi->nh) {
2191                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2192                                 kfree(fib_work);
2193                                 return notifier_from_errno(-EINVAL);
2194                         }
2195                 }
2196
2197                 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2198                 /* Take referece on fib_info to prevent it from being
2199                  * freed while work is queued. Release it afterwards.
2200                  */
2201                 fib_info_hold(fib_work->fen_info.fi);
2202                 break;
2203         case FIB_EVENT_RULE_ADD:
2204         case FIB_EVENT_RULE_DEL:
2205                 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2206                 fib_rule_get(fib_work->fr_info.rule);
2207                 break;
2208         }
2209
2210         queue_work(rocker->rocker_owq, &fib_work->work);
2211
2212         return NOTIFY_DONE;
2213 }
2214
2215 /********************
2216  * ethtool interface
2217  ********************/
2218
2219 static int
2220 rocker_port_get_link_ksettings(struct net_device *dev,
2221                                struct ethtool_link_ksettings *ecmd)
2222 {
2223         struct rocker_port *rocker_port = netdev_priv(dev);
2224
2225         return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2226 }
2227
2228 static int
2229 rocker_port_set_link_ksettings(struct net_device *dev,
2230                                const struct ethtool_link_ksettings *ecmd)
2231 {
2232         struct rocker_port *rocker_port = netdev_priv(dev);
2233
2234         return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2235 }
2236
2237 static void rocker_port_get_drvinfo(struct net_device *dev,
2238                                     struct ethtool_drvinfo *drvinfo)
2239 {
2240         strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2241         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2242 }
2243
2244 static struct rocker_port_stats {
2245         char str[ETH_GSTRING_LEN];
2246         int type;
2247 } rocker_port_stats[] = {
2248         { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2249         { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2250         { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2251         { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2252
2253         { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2254         { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2255         { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2256         { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2257 };
2258
2259 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2260
2261 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2262                                     u8 *data)
2263 {
2264         u8 *p = data;
2265         int i;
2266
2267         switch (stringset) {
2268         case ETH_SS_STATS:
2269                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2270                         memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2271                         p += ETH_GSTRING_LEN;
2272                 }
2273                 break;
2274         }
2275 }
2276
2277 static int
2278 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2279                                struct rocker_desc_info *desc_info,
2280                                void *priv)
2281 {
2282         struct rocker_tlv *cmd_stats;
2283
2284         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2285                                ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2286                 return -EMSGSIZE;
2287
2288         cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2289         if (!cmd_stats)
2290                 return -EMSGSIZE;
2291
2292         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2293                                rocker_port->pport))
2294                 return -EMSGSIZE;
2295
2296         rocker_tlv_nest_end(desc_info, cmd_stats);
2297
2298         return 0;
2299 }
2300
2301 static int
2302 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2303                                        const struct rocker_desc_info *desc_info,
2304                                        void *priv)
2305 {
2306         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2307         const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2308         const struct rocker_tlv *pattr;
2309         u32 pport;
2310         u64 *data = priv;
2311         int i;
2312
2313         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2314
2315         if (!attrs[ROCKER_TLV_CMD_INFO])
2316                 return -EIO;
2317
2318         rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2319                                 attrs[ROCKER_TLV_CMD_INFO]);
2320
2321         if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2322                 return -EIO;
2323
2324         pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2325         if (pport != rocker_port->pport)
2326                 return -EIO;
2327
2328         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2329                 pattr = stats_attrs[rocker_port_stats[i].type];
2330                 if (!pattr)
2331                         continue;
2332
2333                 data[i] = rocker_tlv_get_u64(pattr);
2334         }
2335
2336         return 0;
2337 }
2338
2339 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2340                                              void *priv)
2341 {
2342         return rocker_cmd_exec(rocker_port, false,
2343                                rocker_cmd_get_port_stats_prep, NULL,
2344                                rocker_cmd_get_port_stats_ethtool_proc,
2345                                priv);
2346 }
2347
2348 static void rocker_port_get_stats(struct net_device *dev,
2349                                   struct ethtool_stats *stats, u64 *data)
2350 {
2351         struct rocker_port *rocker_port = netdev_priv(dev);
2352
2353         if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2354                 int i;
2355
2356                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2357                         data[i] = 0;
2358         }
2359 }
2360
2361 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2362 {
2363         switch (sset) {
2364         case ETH_SS_STATS:
2365                 return ROCKER_PORT_STATS_LEN;
2366         default:
2367                 return -EOPNOTSUPP;
2368         }
2369 }
2370
2371 static const struct ethtool_ops rocker_port_ethtool_ops = {
2372         .get_drvinfo            = rocker_port_get_drvinfo,
2373         .get_link               = ethtool_op_get_link,
2374         .get_strings            = rocker_port_get_strings,
2375         .get_ethtool_stats      = rocker_port_get_stats,
2376         .get_sset_count         = rocker_port_get_sset_count,
2377         .get_link_ksettings     = rocker_port_get_link_ksettings,
2378         .set_link_ksettings     = rocker_port_set_link_ksettings,
2379 };
2380
2381 /*****************
2382  * NAPI interface
2383  *****************/
2384
2385 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2386 {
2387         return container_of(napi, struct rocker_port, napi_tx);
2388 }
2389
2390 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2391 {
2392         struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2393         const struct rocker *rocker = rocker_port->rocker;
2394         const struct rocker_desc_info *desc_info;
2395         u32 credits = 0;
2396         int err;
2397
2398         /* Cleanup tx descriptors */
2399         while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2400                 struct sk_buff *skb;
2401
2402                 err = rocker_desc_err(desc_info);
2403                 if (err && net_ratelimit())
2404                         netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2405                                    err);
2406                 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2407
2408                 skb = rocker_desc_cookie_ptr_get(desc_info);
2409                 if (err == 0) {
2410                         rocker_port->dev->stats.tx_packets++;
2411                         rocker_port->dev->stats.tx_bytes += skb->len;
2412                 } else {
2413                         rocker_port->dev->stats.tx_errors++;
2414                 }
2415
2416                 dev_kfree_skb_any(skb);
2417                 credits++;
2418         }
2419
2420         if (credits && netif_queue_stopped(rocker_port->dev))
2421                 netif_wake_queue(rocker_port->dev);
2422
2423         napi_complete(napi);
2424         rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2425
2426         return 0;
2427 }
2428
2429 static int rocker_port_rx_proc(const struct rocker *rocker,
2430                                const struct rocker_port *rocker_port,
2431                                struct rocker_desc_info *desc_info)
2432 {
2433         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2434         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2435         size_t rx_len;
2436         u16 rx_flags = 0;
2437
2438         if (!skb)
2439                 return -ENOENT;
2440
2441         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2442         if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2443                 return -EINVAL;
2444         if (attrs[ROCKER_TLV_RX_FLAGS])
2445                 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2446
2447         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2448
2449         rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2450         skb_put(skb, rx_len);
2451         skb->protocol = eth_type_trans(skb, rocker_port->dev);
2452
2453         if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2454                 skb->offload_fwd_mark = 1;
2455
2456         rocker_port->dev->stats.rx_packets++;
2457         rocker_port->dev->stats.rx_bytes += skb->len;
2458
2459         netif_receive_skb(skb);
2460
2461         return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2462 }
2463
2464 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2465 {
2466         return container_of(napi, struct rocker_port, napi_rx);
2467 }
2468
2469 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2470 {
2471         struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2472         const struct rocker *rocker = rocker_port->rocker;
2473         struct rocker_desc_info *desc_info;
2474         u32 credits = 0;
2475         int err;
2476
2477         /* Process rx descriptors */
2478         while (credits < budget &&
2479                (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2480                 err = rocker_desc_err(desc_info);
2481                 if (err) {
2482                         if (net_ratelimit())
2483                                 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2484                                            err);
2485                 } else {
2486                         err = rocker_port_rx_proc(rocker, rocker_port,
2487                                                   desc_info);
2488                         if (err && net_ratelimit())
2489                                 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2490                                            err);
2491                 }
2492                 if (err)
2493                         rocker_port->dev->stats.rx_errors++;
2494
2495                 rocker_desc_gen_clear(desc_info);
2496                 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2497                 credits++;
2498         }
2499
2500         if (credits < budget)
2501                 napi_complete_done(napi, credits);
2502
2503         rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2504
2505         return credits;
2506 }
2507
2508 /*****************
2509  * PCI driver ops
2510  *****************/
2511
2512 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2513 {
2514         const struct rocker *rocker = rocker_port->rocker;
2515         u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2516         bool link_up;
2517
2518         link_up = link_status & (1 << rocker_port->pport);
2519         if (link_up)
2520                 netif_carrier_on(rocker_port->dev);
2521         else
2522                 netif_carrier_off(rocker_port->dev);
2523 }
2524
2525 static void rocker_remove_ports(struct rocker *rocker)
2526 {
2527         struct rocker_port *rocker_port;
2528         int i;
2529
2530         for (i = 0; i < rocker->port_count; i++) {
2531                 rocker_port = rocker->ports[i];
2532                 if (!rocker_port)
2533                         continue;
2534                 rocker_world_port_fini(rocker_port);
2535                 unregister_netdev(rocker_port->dev);
2536                 rocker_world_port_post_fini(rocker_port);
2537                 free_netdev(rocker_port->dev);
2538         }
2539         rocker_world_fini(rocker);
2540         kfree(rocker->ports);
2541 }
2542
2543 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2544 {
2545         const struct rocker *rocker = rocker_port->rocker;
2546         const struct pci_dev *pdev = rocker->pdev;
2547         int err;
2548
2549         err = rocker_cmd_get_port_settings_macaddr(rocker_port,
2550                                                    rocker_port->dev->dev_addr);
2551         if (err) {
2552                 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2553                 eth_hw_addr_random(rocker_port->dev);
2554         }
2555 }
2556
2557 #define ROCKER_PORT_MIN_MTU     ETH_MIN_MTU
2558 #define ROCKER_PORT_MAX_MTU     9000
2559 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2560 {
2561         struct pci_dev *pdev = rocker->pdev;
2562         struct rocker_port *rocker_port;
2563         struct net_device *dev;
2564         int err;
2565
2566         dev = alloc_etherdev(sizeof(struct rocker_port));
2567         if (!dev)
2568                 return -ENOMEM;
2569         SET_NETDEV_DEV(dev, &pdev->dev);
2570         rocker_port = netdev_priv(dev);
2571         rocker_port->dev = dev;
2572         rocker_port->rocker = rocker;
2573         rocker_port->port_number = port_number;
2574         rocker_port->pport = port_number + 1;
2575
2576         err = rocker_world_check_init(rocker_port);
2577         if (err) {
2578                 dev_err(&pdev->dev, "world init failed\n");
2579                 goto err_world_check_init;
2580         }
2581
2582         rocker_port_dev_addr_init(rocker_port);
2583         dev->netdev_ops = &rocker_port_netdev_ops;
2584         dev->ethtool_ops = &rocker_port_ethtool_ops;
2585         netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2586                           NAPI_POLL_WEIGHT);
2587         netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2588                        NAPI_POLL_WEIGHT);
2589         rocker_carrier_init(rocker_port);
2590
2591         dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2592
2593         /* MTU range: 68 - 9000 */
2594         dev->min_mtu = ROCKER_PORT_MIN_MTU;
2595         dev->max_mtu = ROCKER_PORT_MAX_MTU;
2596
2597         err = rocker_world_port_pre_init(rocker_port);
2598         if (err) {
2599                 dev_err(&pdev->dev, "port world pre-init failed\n");
2600                 goto err_world_port_pre_init;
2601         }
2602         err = register_netdev(dev);
2603         if (err) {
2604                 dev_err(&pdev->dev, "register_netdev failed\n");
2605                 goto err_register_netdev;
2606         }
2607         rocker->ports[port_number] = rocker_port;
2608
2609         err = rocker_world_port_init(rocker_port);
2610         if (err) {
2611                 dev_err(&pdev->dev, "port world init failed\n");
2612                 goto err_world_port_init;
2613         }
2614
2615         return 0;
2616
2617 err_world_port_init:
2618         rocker->ports[port_number] = NULL;
2619         unregister_netdev(dev);
2620 err_register_netdev:
2621         rocker_world_port_post_fini(rocker_port);
2622 err_world_port_pre_init:
2623 err_world_check_init:
2624         free_netdev(dev);
2625         return err;
2626 }
2627
2628 static int rocker_probe_ports(struct rocker *rocker)
2629 {
2630         int i;
2631         size_t alloc_size;
2632         int err;
2633
2634         alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2635         rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2636         if (!rocker->ports)
2637                 return -ENOMEM;
2638         for (i = 0; i < rocker->port_count; i++) {
2639                 err = rocker_probe_port(rocker, i);
2640                 if (err)
2641                         goto remove_ports;
2642         }
2643         return 0;
2644
2645 remove_ports:
2646         rocker_remove_ports(rocker);
2647         return err;
2648 }
2649
2650 static int rocker_msix_init(struct rocker *rocker)
2651 {
2652         struct pci_dev *pdev = rocker->pdev;
2653         int msix_entries;
2654         int i;
2655         int err;
2656
2657         msix_entries = pci_msix_vec_count(pdev);
2658         if (msix_entries < 0)
2659                 return msix_entries;
2660
2661         if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2662                 return -EINVAL;
2663
2664         rocker->msix_entries = kmalloc_array(msix_entries,
2665                                              sizeof(struct msix_entry),
2666                                              GFP_KERNEL);
2667         if (!rocker->msix_entries)
2668                 return -ENOMEM;
2669
2670         for (i = 0; i < msix_entries; i++)
2671                 rocker->msix_entries[i].entry = i;
2672
2673         err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2674         if (err < 0)
2675                 goto err_enable_msix;
2676
2677         return 0;
2678
2679 err_enable_msix:
2680         kfree(rocker->msix_entries);
2681         return err;
2682 }
2683
2684 static void rocker_msix_fini(const struct rocker *rocker)
2685 {
2686         pci_disable_msix(rocker->pdev);
2687         kfree(rocker->msix_entries);
2688 }
2689
2690 static bool rocker_port_dev_check(const struct net_device *dev)
2691 {
2692         return dev->netdev_ops == &rocker_port_netdev_ops;
2693 }
2694
2695 static int
2696 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2697                 struct switchdev_notifier_port_attr_info *port_attr_info)
2698 {
2699         int err;
2700
2701         err = rocker_port_attr_set(netdev, port_attr_info->attr);
2702
2703         port_attr_info->handled = true;
2704         return notifier_from_errno(err);
2705 }
2706
2707 struct rocker_switchdev_event_work {
2708         struct work_struct work;
2709         struct switchdev_notifier_fdb_info fdb_info;
2710         struct rocker_port *rocker_port;
2711         unsigned long event;
2712 };
2713
2714 static void
2715 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2716                           struct switchdev_notifier_fdb_info *recv_info)
2717 {
2718         struct switchdev_notifier_fdb_info info = {};
2719
2720         info.addr = recv_info->addr;
2721         info.vid = recv_info->vid;
2722         info.offloaded = true;
2723         call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2724                                  rocker_port->dev, &info.info, NULL);
2725 }
2726
2727 static void rocker_switchdev_event_work(struct work_struct *work)
2728 {
2729         struct rocker_switchdev_event_work *switchdev_work =
2730                 container_of(work, struct rocker_switchdev_event_work, work);
2731         struct rocker_port *rocker_port = switchdev_work->rocker_port;
2732         struct switchdev_notifier_fdb_info *fdb_info;
2733         int err;
2734
2735         rtnl_lock();
2736         switch (switchdev_work->event) {
2737         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2738                 fdb_info = &switchdev_work->fdb_info;
2739                 if (!fdb_info->added_by_user || fdb_info->is_local)
2740                         break;
2741                 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2742                 if (err) {
2743                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2744                         break;
2745                 }
2746                 rocker_fdb_offload_notify(rocker_port, fdb_info);
2747                 break;
2748         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2749                 fdb_info = &switchdev_work->fdb_info;
2750                 if (!fdb_info->added_by_user || fdb_info->is_local)
2751                         break;
2752                 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2753                 if (err)
2754                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2755                 break;
2756         }
2757         rtnl_unlock();
2758
2759         kfree(switchdev_work->fdb_info.addr);
2760         kfree(switchdev_work);
2761         dev_put(rocker_port->dev);
2762 }
2763
2764 /* called under rcu_read_lock() */
2765 static int rocker_switchdev_event(struct notifier_block *unused,
2766                                   unsigned long event, void *ptr)
2767 {
2768         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2769         struct rocker_switchdev_event_work *switchdev_work;
2770         struct switchdev_notifier_fdb_info *fdb_info = ptr;
2771         struct rocker_port *rocker_port;
2772
2773         if (!rocker_port_dev_check(dev))
2774                 return NOTIFY_DONE;
2775
2776         if (event == SWITCHDEV_PORT_ATTR_SET)
2777                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2778
2779         rocker_port = netdev_priv(dev);
2780         switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2781         if (WARN_ON(!switchdev_work))
2782                 return NOTIFY_BAD;
2783
2784         INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2785         switchdev_work->rocker_port = rocker_port;
2786         switchdev_work->event = event;
2787
2788         switch (event) {
2789         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2790         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2791                 memcpy(&switchdev_work->fdb_info, ptr,
2792                        sizeof(switchdev_work->fdb_info));
2793                 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2794                 if (unlikely(!switchdev_work->fdb_info.addr)) {
2795                         kfree(switchdev_work);
2796                         return NOTIFY_BAD;
2797                 }
2798
2799                 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2800                                 fdb_info->addr);
2801                 /* Take a reference on the rocker device */
2802                 dev_hold(dev);
2803                 break;
2804         default:
2805                 kfree(switchdev_work);
2806                 return NOTIFY_DONE;
2807         }
2808
2809         queue_work(rocker_port->rocker->rocker_owq,
2810                    &switchdev_work->work);
2811         return NOTIFY_DONE;
2812 }
2813
2814 static int
2815 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2816                         struct switchdev_notifier_port_obj_info *port_obj_info)
2817 {
2818         int err = -EOPNOTSUPP;
2819
2820         switch (event) {
2821         case SWITCHDEV_PORT_OBJ_ADD:
2822                 err = rocker_port_obj_add(netdev, port_obj_info->obj);
2823                 break;
2824         case SWITCHDEV_PORT_OBJ_DEL:
2825                 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2826                 break;
2827         }
2828
2829         port_obj_info->handled = true;
2830         return notifier_from_errno(err);
2831 }
2832
2833 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2834                                            unsigned long event, void *ptr)
2835 {
2836         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2837
2838         if (!rocker_port_dev_check(dev))
2839                 return NOTIFY_DONE;
2840
2841         switch (event) {
2842         case SWITCHDEV_PORT_OBJ_ADD:
2843         case SWITCHDEV_PORT_OBJ_DEL:
2844                 return rocker_switchdev_port_obj_event(event, dev, ptr);
2845         case SWITCHDEV_PORT_ATTR_SET:
2846                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2847         }
2848
2849         return NOTIFY_DONE;
2850 }
2851
2852 static struct notifier_block rocker_switchdev_notifier = {
2853         .notifier_call = rocker_switchdev_event,
2854 };
2855
2856 static struct notifier_block rocker_switchdev_blocking_notifier = {
2857         .notifier_call = rocker_switchdev_blocking_event,
2858 };
2859
2860 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2861 {
2862         struct notifier_block *nb;
2863         struct rocker *rocker;
2864         int err;
2865
2866         rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2867         if (!rocker)
2868                 return -ENOMEM;
2869
2870         err = pci_enable_device(pdev);
2871         if (err) {
2872                 dev_err(&pdev->dev, "pci_enable_device failed\n");
2873                 goto err_pci_enable_device;
2874         }
2875
2876         err = pci_request_regions(pdev, rocker_driver_name);
2877         if (err) {
2878                 dev_err(&pdev->dev, "pci_request_regions failed\n");
2879                 goto err_pci_request_regions;
2880         }
2881
2882         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2883         if (!err) {
2884                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2885                 if (err) {
2886                         dev_err(&pdev->dev, "dma_set_coherent_mask failed\n");
2887                         goto err_pci_set_dma_mask;
2888                 }
2889         } else {
2890                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2891                 if (err) {
2892                         dev_err(&pdev->dev, "dma_set_mask failed\n");
2893                         goto err_pci_set_dma_mask;
2894                 }
2895         }
2896
2897         if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2898                 dev_err(&pdev->dev, "invalid PCI region size\n");
2899                 err = -EINVAL;
2900                 goto err_pci_resource_len_check;
2901         }
2902
2903         rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2904                                   pci_resource_len(pdev, 0));
2905         if (!rocker->hw_addr) {
2906                 dev_err(&pdev->dev, "ioremap failed\n");
2907                 err = -EIO;
2908                 goto err_ioremap;
2909         }
2910         pci_set_master(pdev);
2911
2912         rocker->pdev = pdev;
2913         pci_set_drvdata(pdev, rocker);
2914
2915         rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2916
2917         err = rocker_msix_init(rocker);
2918         if (err) {
2919                 dev_err(&pdev->dev, "MSI-X init failed\n");
2920                 goto err_msix_init;
2921         }
2922
2923         err = rocker_basic_hw_test(rocker);
2924         if (err) {
2925                 dev_err(&pdev->dev, "basic hw test failed\n");
2926                 goto err_basic_hw_test;
2927         }
2928
2929         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2930
2931         err = rocker_dma_rings_init(rocker);
2932         if (err)
2933                 goto err_dma_rings_init;
2934
2935         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2936                           rocker_cmd_irq_handler, 0,
2937                           rocker_driver_name, rocker);
2938         if (err) {
2939                 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2940                 goto err_request_cmd_irq;
2941         }
2942
2943         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2944                           rocker_event_irq_handler, 0,
2945                           rocker_driver_name, rocker);
2946         if (err) {
2947                 dev_err(&pdev->dev, "cannot assign event irq\n");
2948                 goto err_request_event_irq;
2949         }
2950
2951         rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2952                                                      WQ_MEM_RECLAIM);
2953         if (!rocker->rocker_owq) {
2954                 err = -ENOMEM;
2955                 goto err_alloc_ordered_workqueue;
2956         }
2957
2958         err = rocker_probe_ports(rocker);
2959         if (err) {
2960                 dev_err(&pdev->dev, "failed to probe ports\n");
2961                 goto err_probe_ports;
2962         }
2963
2964         /* Only FIBs pointing to our own netdevs are programmed into
2965          * the device, so no need to pass a callback.
2966          */
2967         rocker->fib_nb.notifier_call = rocker_router_fib_event;
2968         err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2969         if (err)
2970                 goto err_register_fib_notifier;
2971
2972         err = register_switchdev_notifier(&rocker_switchdev_notifier);
2973         if (err) {
2974                 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2975                 goto err_register_switchdev_notifier;
2976         }
2977
2978         nb = &rocker_switchdev_blocking_notifier;
2979         err = register_switchdev_blocking_notifier(nb);
2980         if (err) {
2981                 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2982                 goto err_register_switchdev_blocking_notifier;
2983         }
2984
2985         rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2986
2987         dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2988                  (int)sizeof(rocker->hw.id), &rocker->hw.id);
2989
2990         return 0;
2991
2992 err_register_switchdev_blocking_notifier:
2993         unregister_switchdev_notifier(&rocker_switchdev_notifier);
2994 err_register_switchdev_notifier:
2995         unregister_fib_notifier(&init_net, &rocker->fib_nb);
2996 err_register_fib_notifier:
2997         rocker_remove_ports(rocker);
2998 err_probe_ports:
2999         destroy_workqueue(rocker->rocker_owq);
3000 err_alloc_ordered_workqueue:
3001         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3002 err_request_event_irq:
3003         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3004 err_request_cmd_irq:
3005         rocker_dma_rings_fini(rocker);
3006 err_dma_rings_init:
3007 err_basic_hw_test:
3008         rocker_msix_fini(rocker);
3009 err_msix_init:
3010         iounmap(rocker->hw_addr);
3011 err_ioremap:
3012 err_pci_resource_len_check:
3013 err_pci_set_dma_mask:
3014         pci_release_regions(pdev);
3015 err_pci_request_regions:
3016         pci_disable_device(pdev);
3017 err_pci_enable_device:
3018         kfree(rocker);
3019         return err;
3020 }
3021
3022 static void rocker_remove(struct pci_dev *pdev)
3023 {
3024         struct rocker *rocker = pci_get_drvdata(pdev);
3025         struct notifier_block *nb;
3026
3027         nb = &rocker_switchdev_blocking_notifier;
3028         unregister_switchdev_blocking_notifier(nb);
3029
3030         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3031         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3032         rocker_remove_ports(rocker);
3033         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3034         destroy_workqueue(rocker->rocker_owq);
3035         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3036         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3037         rocker_dma_rings_fini(rocker);
3038         rocker_msix_fini(rocker);
3039         iounmap(rocker->hw_addr);
3040         pci_release_regions(rocker->pdev);
3041         pci_disable_device(rocker->pdev);
3042         kfree(rocker);
3043 }
3044
3045 static struct pci_driver rocker_pci_driver = {
3046         .name           = rocker_driver_name,
3047         .id_table       = rocker_pci_id_table,
3048         .probe          = rocker_probe,
3049         .remove         = rocker_remove,
3050 };
3051
3052 /************************************
3053  * Net device notifier event handler
3054  ************************************/
3055
3056 static bool rocker_port_dev_check_under(const struct net_device *dev,
3057                                         struct rocker *rocker)
3058 {
3059         struct rocker_port *rocker_port;
3060
3061         if (!rocker_port_dev_check(dev))
3062                 return false;
3063
3064         rocker_port = netdev_priv(dev);
3065         if (rocker_port->rocker != rocker)
3066                 return false;
3067
3068         return true;
3069 }
3070
3071 struct rocker_walk_data {
3072         struct rocker *rocker;
3073         struct rocker_port *port;
3074 };
3075
3076 static int rocker_lower_dev_walk(struct net_device *lower_dev,
3077                                  struct netdev_nested_priv *priv)
3078 {
3079         struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3080         int ret = 0;
3081
3082         if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3083                 data->port = netdev_priv(lower_dev);
3084                 ret = 1;
3085         }
3086
3087         return ret;
3088 }
3089
3090 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3091                                                struct rocker *rocker)
3092 {
3093         struct netdev_nested_priv priv;
3094         struct rocker_walk_data data;
3095
3096         if (rocker_port_dev_check_under(dev, rocker))
3097                 return netdev_priv(dev);
3098
3099         data.rocker = rocker;
3100         data.port = NULL;
3101         priv.data = (void *)&data;
3102         netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3103
3104         return data.port;
3105 }
3106
3107 static int rocker_netdevice_event(struct notifier_block *unused,
3108                                   unsigned long event, void *ptr)
3109 {
3110         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3111         struct netdev_notifier_changeupper_info *info;
3112         struct rocker_port *rocker_port;
3113         int err;
3114
3115         if (!rocker_port_dev_check(dev))
3116                 return NOTIFY_DONE;
3117
3118         switch (event) {
3119         case NETDEV_CHANGEUPPER:
3120                 info = ptr;
3121                 if (!info->master)
3122                         goto out;
3123                 rocker_port = netdev_priv(dev);
3124                 if (info->linking) {
3125                         err = rocker_world_port_master_linked(rocker_port,
3126                                                               info->upper_dev);
3127                         if (err)
3128                                 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3129                                             err);
3130                 } else {
3131                         err = rocker_world_port_master_unlinked(rocker_port,
3132                                                                 info->upper_dev);
3133                         if (err)
3134                                 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3135                                             err);
3136                 }
3137         }
3138 out:
3139         return NOTIFY_DONE;
3140 }
3141
3142 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3143         .notifier_call = rocker_netdevice_event,
3144 };
3145
3146 /************************************
3147  * Net event notifier event handler
3148  ************************************/
3149
3150 static int rocker_netevent_event(struct notifier_block *unused,
3151                                  unsigned long event, void *ptr)
3152 {
3153         struct rocker_port *rocker_port;
3154         struct net_device *dev;
3155         struct neighbour *n = ptr;
3156         int err;
3157
3158         switch (event) {
3159         case NETEVENT_NEIGH_UPDATE:
3160                 if (n->tbl != &arp_tbl)
3161                         return NOTIFY_DONE;
3162                 dev = n->dev;
3163                 if (!rocker_port_dev_check(dev))
3164                         return NOTIFY_DONE;
3165                 rocker_port = netdev_priv(dev);
3166                 err = rocker_world_port_neigh_update(rocker_port, n);
3167                 if (err)
3168                         netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3169                                     err);
3170                 break;
3171         }
3172
3173         return NOTIFY_DONE;
3174 }
3175
3176 static struct notifier_block rocker_netevent_nb __read_mostly = {
3177         .notifier_call = rocker_netevent_event,
3178 };
3179
3180 /***********************
3181  * Module init and exit
3182  ***********************/
3183
3184 static int __init rocker_module_init(void)
3185 {
3186         int err;
3187
3188         register_netdevice_notifier(&rocker_netdevice_nb);
3189         register_netevent_notifier(&rocker_netevent_nb);
3190         err = pci_register_driver(&rocker_pci_driver);
3191         if (err)
3192                 goto err_pci_register_driver;
3193         return 0;
3194
3195 err_pci_register_driver:
3196         unregister_netevent_notifier(&rocker_netevent_nb);
3197         unregister_netdevice_notifier(&rocker_netdevice_nb);
3198         return err;
3199 }
3200
3201 static void __exit rocker_module_exit(void)
3202 {
3203         unregister_netevent_notifier(&rocker_netevent_nb);
3204         unregister_netdevice_notifier(&rocker_netdevice_nb);
3205         pci_unregister_driver(&rocker_pci_driver);
3206 }
3207
3208 module_init(rocker_module_init);
3209 module_exit(rocker_module_exit);
3210
3211 MODULE_LICENSE("GPL v2");
3212 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3213 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
3214 MODULE_DESCRIPTION("Rocker switch device driver");
3215 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);