drivers/net/ethernet/rocker/rocker_main.c

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