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