drivers/net/ethernet/rocker/rocker_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
   4  * Copyright (c) 2014-2016 Jiri Pirko <[email protected]>
   5  * Copyright (c) 2014 Scott Feldman <[email protected]>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/sched.h>
  13 #include <linux/wait.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/sort.h>
  16 #include <linux/random.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/socket.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/if_ether.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/if_bridge.h>
  25 #include <linux/bitops.h>
  26 #include <linux/ctype.h>
  27 #include <linux/workqueue.h>
  28 #include <net/switchdev.h>
  29 #include <net/rtnetlink.h>
  30 #include <net/netevent.h>
  31 #include <net/arp.h>
  32 #include <net/fib_rules.h>
  33 #include <net/fib_notifier.h>
  34 #include <linux/io-64-nonatomic-lo-hi.h>
  35 #include <generated/utsrelease.h>
  36
  37 #include "rocker_hw.h"
  38 #include "rocker.h"
  39 #include "rocker_tlv.h"
  40
  41 static const char rocker_driver_name[] = "rocker";
  42
  43 static const struct pci_device_id rocker_pci_id_table[] = {
  44         {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
  45         {0, }
  46 };
  47
  48 struct rocker_wait {
  49         wait_queue_head_t wait;
  50         bool done;
  51         bool nowait;
  52 };
  53
  54 static void rocker_wait_reset(struct rocker_wait *wait)
  55 {
  56         wait->done = false;
  57         wait->nowait = false;
  58 }
  59
  60 static void rocker_wait_init(struct rocker_wait *wait)
  61 {
  62         init_waitqueue_head(&wait->wait);
  63         rocker_wait_reset(wait);
  64 }
  65
  66 static struct rocker_wait *rocker_wait_create(void)
  67 {
  68         struct rocker_wait *wait;
  69
  70         wait = kzalloc(sizeof(*wait), GFP_KERNEL);
  71         if (!wait)
  72                 return NULL;
  73         return wait;
  74 }
  75
  76 static void rocker_wait_destroy(struct rocker_wait *wait)
  77 {
  78         kfree(wait);
  79 }
  80
  81 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
  82                                       unsigned long timeout)
  83 {
  84         wait_event_timeout(wait->wait, wait->done, HZ / 10);
  85         if (!wait->done)
  86                 return false;
  87         return true;
  88 }
  89
  90 static void rocker_wait_wake_up(struct rocker_wait *wait)
  91 {
  92         wait->done = true;
  93         wake_up(&wait->wait);
  94 }
  95
  96 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
  97 {
  98         return rocker->msix_entries[vector].vector;
  99 }
 100
 101 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
 102 {
 103         return rocker_msix_vector(rocker_port->rocker,
 104                                   ROCKER_MSIX_VEC_TX(rocker_port->port_number));
 105 }
 106
 107 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
 108 {
 109         return rocker_msix_vector(rocker_port->rocker,
 110                                   ROCKER_MSIX_VEC_RX(rocker_port->port_number));
 111 }
 112
 113 #define rocker_write32(rocker, reg, val)        \
 114         writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 115 #define rocker_read32(rocker, reg)      \
 116         readl((rocker)->hw_addr + (ROCKER_ ## reg))
 117 #define rocker_write64(rocker, reg, val)        \
 118         writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 119 #define rocker_read64(rocker, reg)      \
 120         readq((rocker)->hw_addr + (ROCKER_ ## reg))
 121
 122 /*****************************
 123  * HW basic testing functions
 124  *****************************/
 125
 126 static int rocker_reg_test(const struct rocker *rocker)
 127 {
 128         const struct pci_dev *pdev = rocker->pdev;
 129         u64 test_reg;
 130         u64 rnd;
 131
 132         rnd = prandom_u32();
 133         rnd >>= 1;
 134         rocker_write32(rocker, TEST_REG, rnd);
 135         test_reg = rocker_read32(rocker, TEST_REG);
 136         if (test_reg != rnd * 2) {
 137                 dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
 138                         test_reg, rnd * 2);
 139                 return -EIO;
 140         }
 141
 142         rnd = prandom_u32();
 143         rnd <<= 31;
 144         rnd |= prandom_u32();
 145         rocker_write64(rocker, TEST_REG64, rnd);
 146         test_reg = rocker_read64(rocker, TEST_REG64);
 147         if (test_reg != rnd * 2) {
 148                 dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
 149                         test_reg, rnd * 2);
 150                 return -EIO;
 151         }
 152
 153         return 0;
 154 }
 155
 156 static int rocker_dma_test_one(const struct rocker *rocker,
 157                                struct rocker_wait *wait, u32 test_type,
 158                                dma_addr_t dma_handle, const unsigned char *buf,
 159                                const unsigned char *expect, size_t size)
 160 {
 161         const struct pci_dev *pdev = rocker->pdev;
 162         int i;
 163
 164         rocker_wait_reset(wait);
 165         rocker_write32(rocker, TEST_DMA_CTRL, test_type);
 166
 167         if (!rocker_wait_event_timeout(wait, HZ / 10)) {
 168                 dev_err(&pdev->dev, "no interrupt received within a timeout\n");
 169                 return -EIO;
 170         }
 171
 172         for (i = 0; i < size; i++) {
 173                 if (buf[i] != expect[i]) {
 174                         dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
 175                                 buf[i], i, expect[i]);
 176                         return -EIO;
 177                 }
 178         }
 179         return 0;
 180 }
 181
 182 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
 183 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
 184
 185 static int rocker_dma_test_offset(const struct rocker *rocker,
 186                                   struct rocker_wait *wait, int offset)
 187 {
 188         struct pci_dev *pdev = rocker->pdev;
 189         unsigned char *alloc;
 190         unsigned char *buf;
 191         unsigned char *expect;
 192         dma_addr_t dma_handle;
 193         int i;
 194         int err;
 195
 196         alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
 197                         GFP_KERNEL | GFP_DMA);
 198         if (!alloc)
 199                 return -ENOMEM;
 200         buf = alloc + offset;
 201         expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
 202
 203         dma_handle = 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                                            struct netlink_ext_ack *extack)
1675 {
1676         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1677
1678         if (!wops->port_master_linked)
1679                 return -EOPNOTSUPP;
1680         return wops->port_master_linked(rocker_port, master, extack);
1681 }
1682
1683 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
1684                                              struct net_device *master)
1685 {
1686         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1687
1688         if (!wops->port_master_unlinked)
1689                 return -EOPNOTSUPP;
1690         return wops->port_master_unlinked(rocker_port, master);
1691 }
1692
1693 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
1694                                           struct neighbour *n)
1695 {
1696         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1697
1698         if (!wops->port_neigh_update)
1699                 return -EOPNOTSUPP;
1700         return wops->port_neigh_update(rocker_port, n);
1701 }
1702
1703 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
1704                                            struct neighbour *n)
1705 {
1706         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1707
1708         if (!wops->port_neigh_destroy)
1709                 return -EOPNOTSUPP;
1710         return wops->port_neigh_destroy(rocker_port, n);
1711 }
1712
1713 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
1714                                               const unsigned char *addr,
1715                                               __be16 vlan_id)
1716 {
1717         struct rocker_world_ops *wops = rocker_port->rocker->wops;
1718
1719         if (!wops->port_ev_mac_vlan_seen)
1720                 return -EOPNOTSUPP;
1721         return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
1722 }
1723
1724 static int rocker_world_fib4_add(struct rocker *rocker,
1725                                  const struct fib_entry_notifier_info *fen_info)
1726 {
1727         struct rocker_world_ops *wops = rocker->wops;
1728
1729         if (!wops->fib4_add)
1730                 return 0;
1731         return wops->fib4_add(rocker, fen_info);
1732 }
1733
1734 static int rocker_world_fib4_del(struct rocker *rocker,
1735                                  const struct fib_entry_notifier_info *fen_info)
1736 {
1737         struct rocker_world_ops *wops = rocker->wops;
1738
1739         if (!wops->fib4_del)
1740                 return 0;
1741         return wops->fib4_del(rocker, fen_info);
1742 }
1743
1744 static void rocker_world_fib4_abort(struct rocker *rocker)
1745 {
1746         struct rocker_world_ops *wops = rocker->wops;
1747
1748         if (wops->fib4_abort)
1749                 wops->fib4_abort(rocker);
1750 }
1751
1752 /*****************
1753  * Net device ops
1754  *****************/
1755
1756 static int rocker_port_open(struct net_device *dev)
1757 {
1758         struct rocker_port *rocker_port = netdev_priv(dev);
1759         int err;
1760
1761         err = rocker_port_dma_rings_init(rocker_port);
1762         if (err)
1763                 return err;
1764
1765         err = request_irq(rocker_msix_tx_vector(rocker_port),
1766                           rocker_tx_irq_handler, 0,
1767                           rocker_driver_name, rocker_port);
1768         if (err) {
1769                 netdev_err(rocker_port->dev, "cannot assign tx irq\n");
1770                 goto err_request_tx_irq;
1771         }
1772
1773         err = request_irq(rocker_msix_rx_vector(rocker_port),
1774                           rocker_rx_irq_handler, 0,
1775                           rocker_driver_name, rocker_port);
1776         if (err) {
1777                 netdev_err(rocker_port->dev, "cannot assign rx irq\n");
1778                 goto err_request_rx_irq;
1779         }
1780
1781         err = rocker_world_port_open(rocker_port);
1782         if (err) {
1783                 netdev_err(rocker_port->dev, "cannot open port in world\n");
1784                 goto err_world_port_open;
1785         }
1786
1787         napi_enable(&rocker_port->napi_tx);
1788         napi_enable(&rocker_port->napi_rx);
1789         if (!dev->proto_down)
1790                 rocker_port_set_enable(rocker_port, true);
1791         netif_start_queue(dev);
1792         return 0;
1793
1794 err_world_port_open:
1795         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1796 err_request_rx_irq:
1797         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1798 err_request_tx_irq:
1799         rocker_port_dma_rings_fini(rocker_port);
1800         return err;
1801 }
1802
1803 static int rocker_port_stop(struct net_device *dev)
1804 {
1805         struct rocker_port *rocker_port = netdev_priv(dev);
1806
1807         netif_stop_queue(dev);
1808         rocker_port_set_enable(rocker_port, false);
1809         napi_disable(&rocker_port->napi_rx);
1810         napi_disable(&rocker_port->napi_tx);
1811         rocker_world_port_stop(rocker_port);
1812         free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
1813         free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
1814         rocker_port_dma_rings_fini(rocker_port);
1815
1816         return 0;
1817 }
1818
1819 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
1820                                        const struct rocker_desc_info *desc_info)
1821 {
1822         const struct rocker *rocker = rocker_port->rocker;
1823         struct pci_dev *pdev = rocker->pdev;
1824         const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
1825         struct rocker_tlv *attr;
1826         int rem;
1827
1828         rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
1829         if (!attrs[ROCKER_TLV_TX_FRAGS])
1830                 return;
1831         rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
1832                 const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
1833                 dma_addr_t dma_handle;
1834                 size_t len;
1835
1836                 if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
1837                         continue;
1838                 rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
1839                                         attr);
1840                 if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
1841                     !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
1842                         continue;
1843                 dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
1844                 len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
1845                 dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
1846         }
1847 }
1848
1849 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
1850                                        struct rocker_desc_info *desc_info,
1851                                        char *buf, size_t buf_len)
1852 {
1853         const struct rocker *rocker = rocker_port->rocker;
1854         struct pci_dev *pdev = rocker->pdev;
1855         dma_addr_t dma_handle;
1856         struct rocker_tlv *frag;
1857
1858         dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
1859         if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
1860                 if (net_ratelimit())
1861                         netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
1862                 return -EIO;
1863         }
1864         frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
1865         if (!frag)
1866                 goto unmap_frag;
1867         if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
1868                                dma_handle))
1869                 goto nest_cancel;
1870         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
1871                                buf_len))
1872                 goto nest_cancel;
1873         rocker_tlv_nest_end(desc_info, frag);
1874         return 0;
1875
1876 nest_cancel:
1877         rocker_tlv_nest_cancel(desc_info, frag);
1878 unmap_frag:
1879         dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
1880         return -EMSGSIZE;
1881 }
1882
1883 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
1884 {
1885         struct rocker_port *rocker_port = netdev_priv(dev);
1886         struct rocker *rocker = rocker_port->rocker;
1887         struct rocker_desc_info *desc_info;
1888         struct rocker_tlv *frags;
1889         int i;
1890         int err;
1891
1892         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1893         if (unlikely(!desc_info)) {
1894                 if (net_ratelimit())
1895                         netdev_err(dev, "tx ring full when queue awake\n");
1896                 return NETDEV_TX_BUSY;
1897         }
1898
1899         rocker_desc_cookie_ptr_set(desc_info, skb);
1900
1901         frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
1902         if (!frags)
1903                 goto out;
1904         err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1905                                           skb->data, skb_headlen(skb));
1906         if (err)
1907                 goto nest_cancel;
1908         if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
1909                 err = skb_linearize(skb);
1910                 if (err)
1911                         goto unmap_frags;
1912         }
1913
1914         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1915                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1916
1917                 err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
1918                                                   skb_frag_address(frag),
1919                                                   skb_frag_size(frag));
1920                 if (err)
1921                         goto unmap_frags;
1922         }
1923         rocker_tlv_nest_end(desc_info, frags);
1924
1925         rocker_desc_gen_clear(desc_info);
1926         rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
1927
1928         desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
1929         if (!desc_info)
1930                 netif_stop_queue(dev);
1931
1932         return NETDEV_TX_OK;
1933
1934 unmap_frags:
1935         rocker_tx_desc_frags_unmap(rocker_port, desc_info);
1936 nest_cancel:
1937         rocker_tlv_nest_cancel(desc_info, frags);
1938 out:
1939         dev_kfree_skb(skb);
1940         dev->stats.tx_dropped++;
1941
1942         return NETDEV_TX_OK;
1943 }
1944
1945 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
1946 {
1947         struct sockaddr *addr = p;
1948         struct rocker_port *rocker_port = netdev_priv(dev);
1949         int err;
1950
1951         if (!is_valid_ether_addr(addr->sa_data))
1952                 return -EADDRNOTAVAIL;
1953
1954         err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
1955         if (err)
1956                 return err;
1957         eth_hw_addr_set(dev, addr->sa_data);
1958         return 0;
1959 }
1960
1961 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
1962 {
1963         struct rocker_port *rocker_port = netdev_priv(dev);
1964         int running = netif_running(dev);
1965         int err;
1966
1967         if (running)
1968                 rocker_port_stop(dev);
1969
1970         netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
1971         dev->mtu = new_mtu;
1972
1973         err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
1974         if (err)
1975                 return err;
1976
1977         if (running)
1978                 err = rocker_port_open(dev);
1979
1980         return err;
1981 }
1982
1983 static int rocker_port_get_phys_port_name(struct net_device *dev,
1984                                           char *buf, size_t len)
1985 {
1986         struct rocker_port *rocker_port = netdev_priv(dev);
1987         struct port_name name = { .buf = buf, .len = len };
1988         int err;
1989
1990         err = rocker_cmd_exec(rocker_port, false,
1991                               rocker_cmd_get_port_settings_prep, NULL,
1992                               rocker_cmd_get_port_settings_phys_name_proc,
1993                               &name);
1994
1995         return err ? -EOPNOTSUPP : 0;
1996 }
1997
1998 static int rocker_port_change_proto_down(struct net_device *dev,
1999                                          bool proto_down)
2000 {
2001         struct rocker_port *rocker_port = netdev_priv(dev);
2002
2003         if (rocker_port->dev->flags & IFF_UP)
2004                 rocker_port_set_enable(rocker_port, !proto_down);
2005         rocker_port->dev->proto_down = proto_down;
2006         return 0;
2007 }
2008
2009 static void rocker_port_neigh_destroy(struct net_device *dev,
2010                                       struct neighbour *n)
2011 {
2012         struct rocker_port *rocker_port = netdev_priv(n->dev);
2013         int err;
2014
2015         err = rocker_world_port_neigh_destroy(rocker_port, n);
2016         if (err)
2017                 netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
2018                             err);
2019 }
2020
2021 static int rocker_port_get_port_parent_id(struct net_device *dev,
2022                                           struct netdev_phys_item_id *ppid)
2023 {
2024         const struct rocker_port *rocker_port = netdev_priv(dev);
2025         const struct rocker *rocker = rocker_port->rocker;
2026
2027         ppid->id_len = sizeof(rocker->hw.id);
2028         memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
2029
2030         return 0;
2031 }
2032
2033 static const struct net_device_ops rocker_port_netdev_ops = {
2034         .ndo_open                       = rocker_port_open,
2035         .ndo_stop                       = rocker_port_stop,
2036         .ndo_start_xmit                 = rocker_port_xmit,
2037         .ndo_set_mac_address            = rocker_port_set_mac_address,
2038         .ndo_change_mtu                 = rocker_port_change_mtu,
2039         .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
2040         .ndo_change_proto_down          = rocker_port_change_proto_down,
2041         .ndo_neigh_destroy              = rocker_port_neigh_destroy,
2042         .ndo_get_port_parent_id         = rocker_port_get_port_parent_id,
2043 };
2044
2045 /********************
2046  * swdev interface
2047  ********************/
2048
2049 static int rocker_port_attr_set(struct net_device *dev,
2050                                 const struct switchdev_attr *attr)
2051 {
2052         struct rocker_port *rocker_port = netdev_priv(dev);
2053         int err = 0;
2054
2055         switch (attr->id) {
2056         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
2057                 err = rocker_world_port_attr_stp_state_set(rocker_port,
2058                                                            attr->u.stp_state);
2059                 break;
2060         case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
2061                 err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
2062                                                                   attr->u.brport_flags);
2063                 break;
2064         case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
2065                 err = rocker_world_port_attr_bridge_flags_set(rocker_port,
2066                                                               attr->u.brport_flags);
2067                 break;
2068         case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
2069                 err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
2070                                                                     attr->u.ageing_time);
2071                 break;
2072         default:
2073                 err = -EOPNOTSUPP;
2074                 break;
2075         }
2076
2077         return err;
2078 }
2079
2080 static int rocker_port_obj_add(struct net_device *dev,
2081                                const struct switchdev_obj *obj)
2082 {
2083         struct rocker_port *rocker_port = netdev_priv(dev);
2084         int err = 0;
2085
2086         switch (obj->id) {
2087         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2088                 err = rocker_world_port_obj_vlan_add(rocker_port,
2089                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2090                 break;
2091         default:
2092                 err = -EOPNOTSUPP;
2093                 break;
2094         }
2095
2096         return err;
2097 }
2098
2099 static int rocker_port_obj_del(struct net_device *dev,
2100                                const struct switchdev_obj *obj)
2101 {
2102         struct rocker_port *rocker_port = netdev_priv(dev);
2103         int err = 0;
2104
2105         switch (obj->id) {
2106         case SWITCHDEV_OBJ_ID_PORT_VLAN:
2107                 err = rocker_world_port_obj_vlan_del(rocker_port,
2108                                                      SWITCHDEV_OBJ_PORT_VLAN(obj));
2109                 break;
2110         default:
2111                 err = -EOPNOTSUPP;
2112                 break;
2113         }
2114
2115         return err;
2116 }
2117
2118 struct rocker_fib_event_work {
2119         struct work_struct work;
2120         union {
2121                 struct fib_entry_notifier_info fen_info;
2122                 struct fib_rule_notifier_info fr_info;
2123         };
2124         struct rocker *rocker;
2125         unsigned long event;
2126 };
2127
2128 static void rocker_router_fib_event_work(struct work_struct *work)
2129 {
2130         struct rocker_fib_event_work *fib_work =
2131                 container_of(work, struct rocker_fib_event_work, work);
2132         struct rocker *rocker = fib_work->rocker;
2133         struct fib_rule *rule;
2134         int err;
2135
2136         /* Protect internal structures from changes */
2137         rtnl_lock();
2138         switch (fib_work->event) {
2139         case FIB_EVENT_ENTRY_REPLACE:
2140                 err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
2141                 if (err)
2142                         rocker_world_fib4_abort(rocker);
2143                 fib_info_put(fib_work->fen_info.fi);
2144                 break;
2145         case FIB_EVENT_ENTRY_DEL:
2146                 rocker_world_fib4_del(rocker, &fib_work->fen_info);
2147                 fib_info_put(fib_work->fen_info.fi);
2148                 break;
2149         case FIB_EVENT_RULE_ADD:
2150         case FIB_EVENT_RULE_DEL:
2151                 rule = fib_work->fr_info.rule;
2152                 if (!fib4_rule_default(rule))
2153                         rocker_world_fib4_abort(rocker);
2154                 fib_rule_put(rule);
2155                 break;
2156         }
2157         rtnl_unlock();
2158         kfree(fib_work);
2159 }
2160
2161 /* Called with rcu_read_lock() */
2162 static int rocker_router_fib_event(struct notifier_block *nb,
2163                                    unsigned long event, void *ptr)
2164 {
2165         struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
2166         struct rocker_fib_event_work *fib_work;
2167         struct fib_notifier_info *info = ptr;
2168
2169         if (info->family != AF_INET)
2170                 return NOTIFY_DONE;
2171
2172         fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
2173         if (WARN_ON(!fib_work))
2174                 return NOTIFY_BAD;
2175
2176         INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
2177         fib_work->rocker = rocker;
2178         fib_work->event = event;
2179
2180         switch (event) {
2181         case FIB_EVENT_ENTRY_REPLACE:
2182         case FIB_EVENT_ENTRY_DEL:
2183                 if (info->family == AF_INET) {
2184                         struct fib_entry_notifier_info *fen_info = ptr;
2185
2186                         if (fen_info->fi->fib_nh_is_v6) {
2187                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
2188                                 kfree(fib_work);
2189                                 return notifier_from_errno(-EINVAL);
2190                         }
2191                         if (fen_info->fi->nh) {
2192                                 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
2193                                 kfree(fib_work);
2194                                 return notifier_from_errno(-EINVAL);
2195                         }
2196                 }
2197
2198                 memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
2199                 /* Take referece on fib_info to prevent it from being
2200                  * freed while work is queued. Release it afterwards.
2201                  */
2202                 fib_info_hold(fib_work->fen_info.fi);
2203                 break;
2204         case FIB_EVENT_RULE_ADD:
2205         case FIB_EVENT_RULE_DEL:
2206                 memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
2207                 fib_rule_get(fib_work->fr_info.rule);
2208                 break;
2209         }
2210
2211         queue_work(rocker->rocker_owq, &fib_work->work);
2212
2213         return NOTIFY_DONE;
2214 }
2215
2216 /********************
2217  * ethtool interface
2218  ********************/
2219
2220 static int
2221 rocker_port_get_link_ksettings(struct net_device *dev,
2222                                struct ethtool_link_ksettings *ecmd)
2223 {
2224         struct rocker_port *rocker_port = netdev_priv(dev);
2225
2226         return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
2227 }
2228
2229 static int
2230 rocker_port_set_link_ksettings(struct net_device *dev,
2231                                const struct ethtool_link_ksettings *ecmd)
2232 {
2233         struct rocker_port *rocker_port = netdev_priv(dev);
2234
2235         return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
2236 }
2237
2238 static void rocker_port_get_drvinfo(struct net_device *dev,
2239                                     struct ethtool_drvinfo *drvinfo)
2240 {
2241         strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
2242         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2243 }
2244
2245 static struct rocker_port_stats {
2246         char str[ETH_GSTRING_LEN];
2247         int type;
2248 } rocker_port_stats[] = {
2249         { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
2250         { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
2251         { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
2252         { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
2253
2254         { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
2255         { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
2256         { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
2257         { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
2258 };
2259
2260 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
2261
2262 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
2263                                     u8 *data)
2264 {
2265         u8 *p = data;
2266         int i;
2267
2268         switch (stringset) {
2269         case ETH_SS_STATS:
2270                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2271                         memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
2272                         p += ETH_GSTRING_LEN;
2273                 }
2274                 break;
2275         }
2276 }
2277
2278 static int
2279 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
2280                                struct rocker_desc_info *desc_info,
2281                                void *priv)
2282 {
2283         struct rocker_tlv *cmd_stats;
2284
2285         if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
2286                                ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
2287                 return -EMSGSIZE;
2288
2289         cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
2290         if (!cmd_stats)
2291                 return -EMSGSIZE;
2292
2293         if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
2294                                rocker_port->pport))
2295                 return -EMSGSIZE;
2296
2297         rocker_tlv_nest_end(desc_info, cmd_stats);
2298
2299         return 0;
2300 }
2301
2302 static int
2303 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
2304                                        const struct rocker_desc_info *desc_info,
2305                                        void *priv)
2306 {
2307         const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
2308         const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
2309         const struct rocker_tlv *pattr;
2310         u32 pport;
2311         u64 *data = priv;
2312         int i;
2313
2314         rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
2315
2316         if (!attrs[ROCKER_TLV_CMD_INFO])
2317                 return -EIO;
2318
2319         rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
2320                                 attrs[ROCKER_TLV_CMD_INFO]);
2321
2322         if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
2323                 return -EIO;
2324
2325         pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
2326         if (pport != rocker_port->pport)
2327                 return -EIO;
2328
2329         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
2330                 pattr = stats_attrs[rocker_port_stats[i].type];
2331                 if (!pattr)
2332                         continue;
2333
2334                 data[i] = rocker_tlv_get_u64(pattr);
2335         }
2336
2337         return 0;
2338 }
2339
2340 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
2341                                              void *priv)
2342 {
2343         return rocker_cmd_exec(rocker_port, false,
2344                                rocker_cmd_get_port_stats_prep, NULL,
2345                                rocker_cmd_get_port_stats_ethtool_proc,
2346                                priv);
2347 }
2348
2349 static void rocker_port_get_stats(struct net_device *dev,
2350                                   struct ethtool_stats *stats, u64 *data)
2351 {
2352         struct rocker_port *rocker_port = netdev_priv(dev);
2353
2354         if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
2355                 int i;
2356
2357                 for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
2358                         data[i] = 0;
2359         }
2360 }
2361
2362 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
2363 {
2364         switch (sset) {
2365         case ETH_SS_STATS:
2366                 return ROCKER_PORT_STATS_LEN;
2367         default:
2368                 return -EOPNOTSUPP;
2369         }
2370 }
2371
2372 static const struct ethtool_ops rocker_port_ethtool_ops = {
2373         .get_drvinfo            = rocker_port_get_drvinfo,
2374         .get_link               = ethtool_op_get_link,
2375         .get_strings            = rocker_port_get_strings,
2376         .get_ethtool_stats      = rocker_port_get_stats,
2377         .get_sset_count         = rocker_port_get_sset_count,
2378         .get_link_ksettings     = rocker_port_get_link_ksettings,
2379         .set_link_ksettings     = rocker_port_set_link_ksettings,
2380 };
2381
2382 /*****************
2383  * NAPI interface
2384  *****************/
2385
2386 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
2387 {
2388         return container_of(napi, struct rocker_port, napi_tx);
2389 }
2390
2391 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
2392 {
2393         struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
2394         const struct rocker *rocker = rocker_port->rocker;
2395         const struct rocker_desc_info *desc_info;
2396         u32 credits = 0;
2397         int err;
2398
2399         /* Cleanup tx descriptors */
2400         while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
2401                 struct sk_buff *skb;
2402
2403                 err = rocker_desc_err(desc_info);
2404                 if (err && net_ratelimit())
2405                         netdev_err(rocker_port->dev, "tx desc received with err %d\n",
2406                                    err);
2407                 rocker_tx_desc_frags_unmap(rocker_port, desc_info);
2408
2409                 skb = rocker_desc_cookie_ptr_get(desc_info);
2410                 if (err == 0) {
2411                         rocker_port->dev->stats.tx_packets++;
2412                         rocker_port->dev->stats.tx_bytes += skb->len;
2413                 } else {
2414                         rocker_port->dev->stats.tx_errors++;
2415                 }
2416
2417                 dev_kfree_skb_any(skb);
2418                 credits++;
2419         }
2420
2421         if (credits && netif_queue_stopped(rocker_port->dev))
2422                 netif_wake_queue(rocker_port->dev);
2423
2424         napi_complete(napi);
2425         rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
2426
2427         return 0;
2428 }
2429
2430 static int rocker_port_rx_proc(const struct rocker *rocker,
2431                                const struct rocker_port *rocker_port,
2432                                struct rocker_desc_info *desc_info)
2433 {
2434         const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
2435         struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
2436         size_t rx_len;
2437         u16 rx_flags = 0;
2438
2439         if (!skb)
2440                 return -ENOENT;
2441
2442         rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
2443         if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
2444                 return -EINVAL;
2445         if (attrs[ROCKER_TLV_RX_FLAGS])
2446                 rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
2447
2448         rocker_dma_rx_ring_skb_unmap(rocker, attrs);
2449
2450         rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
2451         skb_put(skb, rx_len);
2452         skb->protocol = eth_type_trans(skb, rocker_port->dev);
2453
2454         if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
2455                 skb->offload_fwd_mark = 1;
2456
2457         rocker_port->dev->stats.rx_packets++;
2458         rocker_port->dev->stats.rx_bytes += skb->len;
2459
2460         netif_receive_skb(skb);
2461
2462         return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
2463 }
2464
2465 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
2466 {
2467         return container_of(napi, struct rocker_port, napi_rx);
2468 }
2469
2470 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
2471 {
2472         struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
2473         const struct rocker *rocker = rocker_port->rocker;
2474         struct rocker_desc_info *desc_info;
2475         u32 credits = 0;
2476         int err;
2477
2478         /* Process rx descriptors */
2479         while (credits < budget &&
2480                (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
2481                 err = rocker_desc_err(desc_info);
2482                 if (err) {
2483                         if (net_ratelimit())
2484                                 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
2485                                            err);
2486                 } else {
2487                         err = rocker_port_rx_proc(rocker, rocker_port,
2488                                                   desc_info);
2489                         if (err && net_ratelimit())
2490                                 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
2491                                            err);
2492                 }
2493                 if (err)
2494                         rocker_port->dev->stats.rx_errors++;
2495
2496                 rocker_desc_gen_clear(desc_info);
2497                 rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
2498                 credits++;
2499         }
2500
2501         if (credits < budget)
2502                 napi_complete_done(napi, credits);
2503
2504         rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
2505
2506         return credits;
2507 }
2508
2509 /*****************
2510  * PCI driver ops
2511  *****************/
2512
2513 static void rocker_carrier_init(const struct rocker_port *rocker_port)
2514 {
2515         const struct rocker *rocker = rocker_port->rocker;
2516         u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
2517         bool link_up;
2518
2519         link_up = link_status & (1 << rocker_port->pport);
2520         if (link_up)
2521                 netif_carrier_on(rocker_port->dev);
2522         else
2523                 netif_carrier_off(rocker_port->dev);
2524 }
2525
2526 static void rocker_remove_ports(struct rocker *rocker)
2527 {
2528         struct rocker_port *rocker_port;
2529         int i;
2530
2531         for (i = 0; i < rocker->port_count; i++) {
2532                 rocker_port = rocker->ports[i];
2533                 if (!rocker_port)
2534                         continue;
2535                 rocker_world_port_fini(rocker_port);
2536                 unregister_netdev(rocker_port->dev);
2537                 rocker_world_port_post_fini(rocker_port);
2538                 free_netdev(rocker_port->dev);
2539         }
2540         rocker_world_fini(rocker);
2541         kfree(rocker->ports);
2542 }
2543
2544 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
2545 {
2546         const struct rocker *rocker = rocker_port->rocker;
2547         const struct pci_dev *pdev = rocker->pdev;
2548         u8 addr[ETH_ALEN];
2549         int err;
2550
2551         err = rocker_cmd_get_port_settings_macaddr(rocker_port, addr);
2552         if (!err) {
2553                 eth_hw_addr_set(rocker_port->dev, addr);
2554         } else {
2555                 dev_warn(&pdev->dev, "failed to get mac address, using random\n");
2556                 eth_hw_addr_random(rocker_port->dev);
2557         }
2558 }
2559
2560 #define ROCKER_PORT_MIN_MTU     ETH_MIN_MTU
2561 #define ROCKER_PORT_MAX_MTU     9000
2562 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
2563 {
2564         struct pci_dev *pdev = rocker->pdev;
2565         struct rocker_port *rocker_port;
2566         struct net_device *dev;
2567         int err;
2568
2569         dev = alloc_etherdev(sizeof(struct rocker_port));
2570         if (!dev)
2571                 return -ENOMEM;
2572         SET_NETDEV_DEV(dev, &pdev->dev);
2573         rocker_port = netdev_priv(dev);
2574         rocker_port->dev = dev;
2575         rocker_port->rocker = rocker;
2576         rocker_port->port_number = port_number;
2577         rocker_port->pport = port_number + 1;
2578
2579         err = rocker_world_check_init(rocker_port);
2580         if (err) {
2581                 dev_err(&pdev->dev, "world init failed\n");
2582                 goto err_world_check_init;
2583         }
2584
2585         rocker_port_dev_addr_init(rocker_port);
2586         dev->netdev_ops = &rocker_port_netdev_ops;
2587         dev->ethtool_ops = &rocker_port_ethtool_ops;
2588         netif_tx_napi_add(dev, &rocker_port->napi_tx, rocker_port_poll_tx,
2589                           NAPI_POLL_WEIGHT);
2590         netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
2591                        NAPI_POLL_WEIGHT);
2592         rocker_carrier_init(rocker_port);
2593
2594         dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
2595
2596         /* MTU range: 68 - 9000 */
2597         dev->min_mtu = ROCKER_PORT_MIN_MTU;
2598         dev->max_mtu = ROCKER_PORT_MAX_MTU;
2599
2600         err = rocker_world_port_pre_init(rocker_port);
2601         if (err) {
2602                 dev_err(&pdev->dev, "port world pre-init failed\n");
2603                 goto err_world_port_pre_init;
2604         }
2605         err = register_netdev(dev);
2606         if (err) {
2607                 dev_err(&pdev->dev, "register_netdev failed\n");
2608                 goto err_register_netdev;
2609         }
2610         rocker->ports[port_number] = rocker_port;
2611
2612         err = rocker_world_port_init(rocker_port);
2613         if (err) {
2614                 dev_err(&pdev->dev, "port world init failed\n");
2615                 goto err_world_port_init;
2616         }
2617
2618         return 0;
2619
2620 err_world_port_init:
2621         rocker->ports[port_number] = NULL;
2622         unregister_netdev(dev);
2623 err_register_netdev:
2624         rocker_world_port_post_fini(rocker_port);
2625 err_world_port_pre_init:
2626 err_world_check_init:
2627         free_netdev(dev);
2628         return err;
2629 }
2630
2631 static int rocker_probe_ports(struct rocker *rocker)
2632 {
2633         int i;
2634         size_t alloc_size;
2635         int err;
2636
2637         alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
2638         rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
2639         if (!rocker->ports)
2640                 return -ENOMEM;
2641         for (i = 0; i < rocker->port_count; i++) {
2642                 err = rocker_probe_port(rocker, i);
2643                 if (err)
2644                         goto remove_ports;
2645         }
2646         return 0;
2647
2648 remove_ports:
2649         rocker_remove_ports(rocker);
2650         return err;
2651 }
2652
2653 static int rocker_msix_init(struct rocker *rocker)
2654 {
2655         struct pci_dev *pdev = rocker->pdev;
2656         int msix_entries;
2657         int i;
2658         int err;
2659
2660         msix_entries = pci_msix_vec_count(pdev);
2661         if (msix_entries < 0)
2662                 return msix_entries;
2663
2664         if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
2665                 return -EINVAL;
2666
2667         rocker->msix_entries = kmalloc_array(msix_entries,
2668                                              sizeof(struct msix_entry),
2669                                              GFP_KERNEL);
2670         if (!rocker->msix_entries)
2671                 return -ENOMEM;
2672
2673         for (i = 0; i < msix_entries; i++)
2674                 rocker->msix_entries[i].entry = i;
2675
2676         err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
2677         if (err < 0)
2678                 goto err_enable_msix;
2679
2680         return 0;
2681
2682 err_enable_msix:
2683         kfree(rocker->msix_entries);
2684         return err;
2685 }
2686
2687 static void rocker_msix_fini(const struct rocker *rocker)
2688 {
2689         pci_disable_msix(rocker->pdev);
2690         kfree(rocker->msix_entries);
2691 }
2692
2693 static bool rocker_port_dev_check(const struct net_device *dev)
2694 {
2695         return dev->netdev_ops == &rocker_port_netdev_ops;
2696 }
2697
2698 static int
2699 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
2700                 struct switchdev_notifier_port_attr_info *port_attr_info)
2701 {
2702         int err;
2703
2704         err = rocker_port_attr_set(netdev, port_attr_info->attr);
2705
2706         port_attr_info->handled = true;
2707         return notifier_from_errno(err);
2708 }
2709
2710 struct rocker_switchdev_event_work {
2711         struct work_struct work;
2712         struct switchdev_notifier_fdb_info fdb_info;
2713         struct rocker_port *rocker_port;
2714         unsigned long event;
2715 };
2716
2717 static void
2718 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
2719                           struct switchdev_notifier_fdb_info *recv_info)
2720 {
2721         struct switchdev_notifier_fdb_info info = {};
2722
2723         info.addr = recv_info->addr;
2724         info.vid = recv_info->vid;
2725         info.offloaded = true;
2726         call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
2727                                  rocker_port->dev, &info.info, NULL);
2728 }
2729
2730 static void rocker_switchdev_event_work(struct work_struct *work)
2731 {
2732         struct rocker_switchdev_event_work *switchdev_work =
2733                 container_of(work, struct rocker_switchdev_event_work, work);
2734         struct rocker_port *rocker_port = switchdev_work->rocker_port;
2735         struct switchdev_notifier_fdb_info *fdb_info;
2736         int err;
2737
2738         rtnl_lock();
2739         switch (switchdev_work->event) {
2740         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2741                 fdb_info = &switchdev_work->fdb_info;
2742                 if (!fdb_info->added_by_user || fdb_info->is_local)
2743                         break;
2744                 err = rocker_world_port_fdb_add(rocker_port, fdb_info);
2745                 if (err) {
2746                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2747                         break;
2748                 }
2749                 rocker_fdb_offload_notify(rocker_port, fdb_info);
2750                 break;
2751         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2752                 fdb_info = &switchdev_work->fdb_info;
2753                 if (!fdb_info->added_by_user || fdb_info->is_local)
2754                         break;
2755                 err = rocker_world_port_fdb_del(rocker_port, fdb_info);
2756                 if (err)
2757                         netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
2758                 break;
2759         }
2760         rtnl_unlock();
2761
2762         kfree(switchdev_work->fdb_info.addr);
2763         kfree(switchdev_work);
2764         dev_put(rocker_port->dev);
2765 }
2766
2767 /* called under rcu_read_lock() */
2768 static int rocker_switchdev_event(struct notifier_block *unused,
2769                                   unsigned long event, void *ptr)
2770 {
2771         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2772         struct rocker_switchdev_event_work *switchdev_work;
2773         struct switchdev_notifier_fdb_info *fdb_info = ptr;
2774         struct rocker_port *rocker_port;
2775
2776         if (!rocker_port_dev_check(dev))
2777                 return NOTIFY_DONE;
2778
2779         if (event == SWITCHDEV_PORT_ATTR_SET)
2780                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2781
2782         rocker_port = netdev_priv(dev);
2783         switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
2784         if (WARN_ON(!switchdev_work))
2785                 return NOTIFY_BAD;
2786
2787         INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
2788         switchdev_work->rocker_port = rocker_port;
2789         switchdev_work->event = event;
2790
2791         switch (event) {
2792         case SWITCHDEV_FDB_ADD_TO_DEVICE:
2793         case SWITCHDEV_FDB_DEL_TO_DEVICE:
2794                 memcpy(&switchdev_work->fdb_info, ptr,
2795                        sizeof(switchdev_work->fdb_info));
2796                 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
2797                 if (unlikely(!switchdev_work->fdb_info.addr)) {
2798                         kfree(switchdev_work);
2799                         return NOTIFY_BAD;
2800                 }
2801
2802                 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
2803                                 fdb_info->addr);
2804                 /* Take a reference on the rocker device */
2805                 dev_hold(dev);
2806                 break;
2807         default:
2808                 kfree(switchdev_work);
2809                 return NOTIFY_DONE;
2810         }
2811
2812         queue_work(rocker_port->rocker->rocker_owq,
2813                    &switchdev_work->work);
2814         return NOTIFY_DONE;
2815 }
2816
2817 static int
2818 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
2819                         struct switchdev_notifier_port_obj_info *port_obj_info)
2820 {
2821         int err = -EOPNOTSUPP;
2822
2823         switch (event) {
2824         case SWITCHDEV_PORT_OBJ_ADD:
2825                 err = rocker_port_obj_add(netdev, port_obj_info->obj);
2826                 break;
2827         case SWITCHDEV_PORT_OBJ_DEL:
2828                 err = rocker_port_obj_del(netdev, port_obj_info->obj);
2829                 break;
2830         }
2831
2832         port_obj_info->handled = true;
2833         return notifier_from_errno(err);
2834 }
2835
2836 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
2837                                            unsigned long event, void *ptr)
2838 {
2839         struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
2840
2841         if (!rocker_port_dev_check(dev))
2842                 return NOTIFY_DONE;
2843
2844         switch (event) {
2845         case SWITCHDEV_PORT_OBJ_ADD:
2846         case SWITCHDEV_PORT_OBJ_DEL:
2847                 return rocker_switchdev_port_obj_event(event, dev, ptr);
2848         case SWITCHDEV_PORT_ATTR_SET:
2849                 return rocker_switchdev_port_attr_set_event(dev, ptr);
2850         }
2851
2852         return NOTIFY_DONE;
2853 }
2854
2855 static struct notifier_block rocker_switchdev_notifier = {
2856         .notifier_call = rocker_switchdev_event,
2857 };
2858
2859 static struct notifier_block rocker_switchdev_blocking_notifier = {
2860         .notifier_call = rocker_switchdev_blocking_event,
2861 };
2862
2863 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2864 {
2865         struct notifier_block *nb;
2866         struct rocker *rocker;
2867         int err;
2868
2869         rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
2870         if (!rocker)
2871                 return -ENOMEM;
2872
2873         err = pci_enable_device(pdev);
2874         if (err) {
2875                 dev_err(&pdev->dev, "pci_enable_device failed\n");
2876                 goto err_pci_enable_device;
2877         }
2878
2879         err = pci_request_regions(pdev, rocker_driver_name);
2880         if (err) {
2881                 dev_err(&pdev->dev, "pci_request_regions failed\n");
2882                 goto err_pci_request_regions;
2883         }
2884
2885         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
2886         if (!err) {
2887                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2888                 if (err) {
2889                         dev_err(&pdev->dev, "dma_set_coherent_mask failed\n");
2890                         goto err_pci_set_dma_mask;
2891                 }
2892         } else {
2893                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2894                 if (err) {
2895                         dev_err(&pdev->dev, "dma_set_mask failed\n");
2896                         goto err_pci_set_dma_mask;
2897                 }
2898         }
2899
2900         if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
2901                 dev_err(&pdev->dev, "invalid PCI region size\n");
2902                 err = -EINVAL;
2903                 goto err_pci_resource_len_check;
2904         }
2905
2906         rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
2907                                   pci_resource_len(pdev, 0));
2908         if (!rocker->hw_addr) {
2909                 dev_err(&pdev->dev, "ioremap failed\n");
2910                 err = -EIO;
2911                 goto err_ioremap;
2912         }
2913         pci_set_master(pdev);
2914
2915         rocker->pdev = pdev;
2916         pci_set_drvdata(pdev, rocker);
2917
2918         rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
2919
2920         err = rocker_msix_init(rocker);
2921         if (err) {
2922                 dev_err(&pdev->dev, "MSI-X init failed\n");
2923                 goto err_msix_init;
2924         }
2925
2926         err = rocker_basic_hw_test(rocker);
2927         if (err) {
2928                 dev_err(&pdev->dev, "basic hw test failed\n");
2929                 goto err_basic_hw_test;
2930         }
2931
2932         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
2933
2934         err = rocker_dma_rings_init(rocker);
2935         if (err)
2936                 goto err_dma_rings_init;
2937
2938         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
2939                           rocker_cmd_irq_handler, 0,
2940                           rocker_driver_name, rocker);
2941         if (err) {
2942                 dev_err(&pdev->dev, "cannot assign cmd irq\n");
2943                 goto err_request_cmd_irq;
2944         }
2945
2946         err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
2947                           rocker_event_irq_handler, 0,
2948                           rocker_driver_name, rocker);
2949         if (err) {
2950                 dev_err(&pdev->dev, "cannot assign event irq\n");
2951                 goto err_request_event_irq;
2952         }
2953
2954         rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
2955                                                      WQ_MEM_RECLAIM);
2956         if (!rocker->rocker_owq) {
2957                 err = -ENOMEM;
2958                 goto err_alloc_ordered_workqueue;
2959         }
2960
2961         err = rocker_probe_ports(rocker);
2962         if (err) {
2963                 dev_err(&pdev->dev, "failed to probe ports\n");
2964                 goto err_probe_ports;
2965         }
2966
2967         /* Only FIBs pointing to our own netdevs are programmed into
2968          * the device, so no need to pass a callback.
2969          */
2970         rocker->fib_nb.notifier_call = rocker_router_fib_event;
2971         err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
2972         if (err)
2973                 goto err_register_fib_notifier;
2974
2975         err = register_switchdev_notifier(&rocker_switchdev_notifier);
2976         if (err) {
2977                 dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
2978                 goto err_register_switchdev_notifier;
2979         }
2980
2981         nb = &rocker_switchdev_blocking_notifier;
2982         err = register_switchdev_blocking_notifier(nb);
2983         if (err) {
2984                 dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
2985                 goto err_register_switchdev_blocking_notifier;
2986         }
2987
2988         rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
2989
2990         dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
2991                  (int)sizeof(rocker->hw.id), &rocker->hw.id);
2992
2993         return 0;
2994
2995 err_register_switchdev_blocking_notifier:
2996         unregister_switchdev_notifier(&rocker_switchdev_notifier);
2997 err_register_switchdev_notifier:
2998         unregister_fib_notifier(&init_net, &rocker->fib_nb);
2999 err_register_fib_notifier:
3000         rocker_remove_ports(rocker);
3001 err_probe_ports:
3002         destroy_workqueue(rocker->rocker_owq);
3003 err_alloc_ordered_workqueue:
3004         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3005 err_request_event_irq:
3006         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3007 err_request_cmd_irq:
3008         rocker_dma_rings_fini(rocker);
3009 err_dma_rings_init:
3010 err_basic_hw_test:
3011         rocker_msix_fini(rocker);
3012 err_msix_init:
3013         iounmap(rocker->hw_addr);
3014 err_ioremap:
3015 err_pci_resource_len_check:
3016 err_pci_set_dma_mask:
3017         pci_release_regions(pdev);
3018 err_pci_request_regions:
3019         pci_disable_device(pdev);
3020 err_pci_enable_device:
3021         kfree(rocker);
3022         return err;
3023 }
3024
3025 static void rocker_remove(struct pci_dev *pdev)
3026 {
3027         struct rocker *rocker = pci_get_drvdata(pdev);
3028         struct notifier_block *nb;
3029
3030         nb = &rocker_switchdev_blocking_notifier;
3031         unregister_switchdev_blocking_notifier(nb);
3032
3033         unregister_switchdev_notifier(&rocker_switchdev_notifier);
3034         unregister_fib_notifier(&init_net, &rocker->fib_nb);
3035         rocker_remove_ports(rocker);
3036         rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
3037         destroy_workqueue(rocker->rocker_owq);
3038         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
3039         free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
3040         rocker_dma_rings_fini(rocker);
3041         rocker_msix_fini(rocker);
3042         iounmap(rocker->hw_addr);
3043         pci_release_regions(rocker->pdev);
3044         pci_disable_device(rocker->pdev);
3045         kfree(rocker);
3046 }
3047
3048 static struct pci_driver rocker_pci_driver = {
3049         .name           = rocker_driver_name,
3050         .id_table       = rocker_pci_id_table,
3051         .probe          = rocker_probe,
3052         .remove         = rocker_remove,
3053 };
3054
3055 /************************************
3056  * Net device notifier event handler
3057  ************************************/
3058
3059 static bool rocker_port_dev_check_under(const struct net_device *dev,
3060                                         struct rocker *rocker)
3061 {
3062         struct rocker_port *rocker_port;
3063
3064         if (!rocker_port_dev_check(dev))
3065                 return false;
3066
3067         rocker_port = netdev_priv(dev);
3068         if (rocker_port->rocker != rocker)
3069                 return false;
3070
3071         return true;
3072 }
3073
3074 struct rocker_walk_data {
3075         struct rocker *rocker;
3076         struct rocker_port *port;
3077 };
3078
3079 static int rocker_lower_dev_walk(struct net_device *lower_dev,
3080                                  struct netdev_nested_priv *priv)
3081 {
3082         struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
3083         int ret = 0;
3084
3085         if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
3086                 data->port = netdev_priv(lower_dev);
3087                 ret = 1;
3088         }
3089
3090         return ret;
3091 }
3092
3093 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
3094                                                struct rocker *rocker)
3095 {
3096         struct netdev_nested_priv priv;
3097         struct rocker_walk_data data;
3098
3099         if (rocker_port_dev_check_under(dev, rocker))
3100                 return netdev_priv(dev);
3101
3102         data.rocker = rocker;
3103         data.port = NULL;
3104         priv.data = (void *)&data;
3105         netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
3106
3107         return data.port;
3108 }
3109
3110 static int rocker_netdevice_event(struct notifier_block *unused,
3111                                   unsigned long event, void *ptr)
3112 {
3113         struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
3114         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3115         struct netdev_notifier_changeupper_info *info;
3116         struct rocker_port *rocker_port;
3117         int err;
3118
3119         if (!rocker_port_dev_check(dev))
3120                 return NOTIFY_DONE;
3121
3122         switch (event) {
3123         case NETDEV_CHANGEUPPER:
3124                 info = ptr;
3125                 if (!info->master)
3126                         goto out;
3127                 rocker_port = netdev_priv(dev);
3128                 if (info->linking) {
3129                         err = rocker_world_port_master_linked(rocker_port,
3130                                                               info->upper_dev,
3131                                                               extack);
3132                         if (err)
3133                                 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
3134                                             err);
3135                 } else {
3136                         err = rocker_world_port_master_unlinked(rocker_port,
3137                                                                 info->upper_dev);
3138                         if (err)
3139                                 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
3140                                             err);
3141                 }
3142         }
3143 out:
3144         return NOTIFY_DONE;
3145 }
3146
3147 static struct notifier_block rocker_netdevice_nb __read_mostly = {
3148         .notifier_call = rocker_netdevice_event,
3149 };
3150
3151 /************************************
3152  * Net event notifier event handler
3153  ************************************/
3154
3155 static int rocker_netevent_event(struct notifier_block *unused,
3156                                  unsigned long event, void *ptr)
3157 {
3158         struct rocker_port *rocker_port;
3159         struct net_device *dev;
3160         struct neighbour *n = ptr;
3161         int err;
3162
3163         switch (event) {
3164         case NETEVENT_NEIGH_UPDATE:
3165                 if (n->tbl != &arp_tbl)
3166                         return NOTIFY_DONE;
3167                 dev = n->dev;
3168                 if (!rocker_port_dev_check(dev))
3169                         return NOTIFY_DONE;
3170                 rocker_port = netdev_priv(dev);
3171                 err = rocker_world_port_neigh_update(rocker_port, n);
3172                 if (err)
3173                         netdev_warn(dev, "failed to handle neigh update (err %d)\n",
3174                                     err);
3175                 break;
3176         }
3177
3178         return NOTIFY_DONE;
3179 }
3180
3181 static struct notifier_block rocker_netevent_nb __read_mostly = {
3182         .notifier_call = rocker_netevent_event,
3183 };
3184
3185 /***********************
3186  * Module init and exit
3187  ***********************/
3188
3189 static int __init rocker_module_init(void)
3190 {
3191         int err;
3192
3193         register_netdevice_notifier(&rocker_netdevice_nb);
3194         register_netevent_notifier(&rocker_netevent_nb);
3195         err = pci_register_driver(&rocker_pci_driver);
3196         if (err)
3197                 goto err_pci_register_driver;
3198         return 0;
3199
3200 err_pci_register_driver:
3201         unregister_netevent_notifier(&rocker_netevent_nb);
3202         unregister_netdevice_notifier(&rocker_netdevice_nb);
3203         return err;
3204 }
3205
3206 static void __exit rocker_module_exit(void)
3207 {
3208         unregister_netevent_notifier(&rocker_netevent_nb);
3209         unregister_netdevice_notifier(&rocker_netdevice_nb);
3210         pci_unregister_driver(&rocker_pci_driver);
3211 }
3212
3213 module_init(rocker_module_init);
3214 module_exit(rocker_module_exit);
3215
3216 MODULE_LICENSE("GPL v2");
3217 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3218 MODULE_AUTHOR("Scott Feldman <[email protected]>");
3219 MODULE_DESCRIPTION("Rocker switch device driver");
3220 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);