Hi Xuan, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] [also build test ERROR on mst-vhost/linux-next linus/master v6.2-rc6 next-20230203] [cannot apply to net/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Xuan-Zhuo/virtio_ring-virtqueue_add-support-premapped/20230202-190707 patch link: https://lore.kernel.org/r/20230202110058.130695-11-xuanzhuo%40linux.alibaba.com patch subject: [PATCH 10/33] xsk: support virtio DMA map config: i386-debian-10.3-kvm (https://download.01.org/0day-ci/archive/20230206/202302060542.IxBGSiKh-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/370aefebcea755f7c4c14e16f8dcb5540769fd26 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Xuan-Zhuo/virtio_ring-virtqueue_add-support-premapped/20230202-190707 git checkout 370aefebcea755f7c4c14e16f8dcb5540769fd26 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 olddefconfig make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): ld: net/xdp/xsk_buff_pool.o: in function `xp_alloc': >> net/xdp/xsk_buff_pool.c:575: undefined reference to `is_virtio_device' >> ld: net/xdp/xsk_buff_pool.c:576: undefined reference to `virtio_dma_sync_signle_range_for_device' ld: net/xdp/xsk_buff_pool.o: in function `__xp_dma_unmap': net/xdp/xsk_buff_pool.c:338: undefined reference to `is_virtio_device' >> ld: net/xdp/xsk_buff_pool.c:339: undefined reference to `virtio_dma_unmap' ld: net/xdp/xsk_buff_pool.o: in function `xp_dma_map': net/xdp/xsk_buff_pool.c:443: undefined reference to `is_virtio_device' ld: net/xdp/xsk_buff_pool.c:443: undefined reference to `virtio_dma_sync_signle_range_for_device' >> ld: net/xdp/xsk_buff_pool.c:443: undefined reference to `virtio_dma_sync_signle_range_for_cpu' >> ld: net/xdp/xsk_buff_pool.c:458: undefined reference to `virtio_dma_map_page' >> ld: net/xdp/xsk_buff_pool.c:461: undefined reference to `virtio_dma_mapping_error' >> ld: net/xdp/xsk_buff_pool.c:464: undefined reference to `virtio_dma_need_sync' >> ld: net/xdp/xsk_buff_pool.c:457: undefined reference to `is_virtio_device' vim +575 net/xdp/xsk_buff_pool.c 424 425 int xp_dma_map(struct xsk_buff_pool *pool, struct device *dev, 426 unsigned long attrs, struct page **pages, u32 nr_pages) 427 { 428 struct xsk_dma_map *dma_map; 429 dma_addr_t dma; 430 int err; 431 u32 i; 432 433 dma_map = xp_find_dma_map(pool); 434 if (dma_map) { 435 err = xp_init_dma_info(pool, dma_map); 436 if (err) 437 return err; 438 439 refcount_inc(&dma_map->users); 440 return 0; 441 } 442 > 443 if (is_virtio_device(dev)) { 444 pool->dma_sync_for_cpu = virtio_dma_sync_signle_range_for_cpu; 445 pool->dma_sync_for_device = virtio_dma_sync_signle_range_for_device; 446 447 } else { 448 pool->dma_sync_for_cpu = dma_sync_for_cpu; 449 pool->dma_sync_for_device = dma_sync_for_device; 450 } 451 452 dma_map = xp_create_dma_map(dev, pool->netdev, nr_pages, pool->umem); 453 if (!dma_map) 454 return -ENOMEM; 455 456 for (i = 0; i < dma_map->dma_pages_cnt; i++) { > 457 if (is_virtio_device(dev)) { > 458 dma = virtio_dma_map_page(dev, pages[i], 0, PAGE_SIZE, 459 DMA_BIDIRECTIONAL); 460 > 461 if (virtio_dma_mapping_error(dev, dma)) 462 goto err; 463 > 464 if (virtio_dma_need_sync(dev, dma)) 465 dma_map->dma_need_sync = true; 466 467 } else { 468 dma = dma_map_page_attrs(dev, pages[i], 0, PAGE_SIZE, 469 DMA_BIDIRECTIONAL, attrs); 470 471 if (dma_mapping_error(dev, dma)) 472 goto err; 473 474 if (dma_need_sync(dev, dma)) 475 dma_map->dma_need_sync = true; 476 } 477 dma_map->dma_pages[i] = dma; 478 } 479 480 if (pool->unaligned) 481 xp_check_dma_contiguity(dma_map); 482 483 err = xp_init_dma_info(pool, dma_map); 484 if (err) { 485 __xp_dma_unmap(dma_map, attrs); 486 return err; 487 } 488 489 return 0; 490 err: 491 __xp_dma_unmap(dma_map, attrs); 492 return -ENOMEM; 493 } 494 EXPORT_SYMBOL(xp_dma_map); 495 496 static bool xp_addr_crosses_non_contig_pg(struct xsk_buff_pool *pool, 497 u64 addr) 498 { 499 return xp_desc_crosses_non_contig_pg(pool, addr, pool->chunk_size); 500 } 501 502 static bool xp_check_unaligned(struct xsk_buff_pool *pool, u64 *addr) 503 { 504 *addr = xp_unaligned_extract_addr(*addr); 505 if (*addr >= pool->addrs_cnt || 506 *addr + pool->chunk_size > pool->addrs_cnt || 507 xp_addr_crosses_non_contig_pg(pool, *addr)) 508 return false; 509 return true; 510 } 511 512 static bool xp_check_aligned(struct xsk_buff_pool *pool, u64 *addr) 513 { 514 *addr = xp_aligned_extract_addr(pool, *addr); 515 return *addr < pool->addrs_cnt; 516 } 517 518 static struct xdp_buff_xsk *__xp_alloc(struct xsk_buff_pool *pool) 519 { 520 struct xdp_buff_xsk *xskb; 521 u64 addr; 522 bool ok; 523 524 if (pool->free_heads_cnt == 0) 525 return NULL; 526 527 for (;;) { 528 if (!xskq_cons_peek_addr_unchecked(pool->fq, &addr)) { 529 pool->fq->queue_empty_descs++; 530 return NULL; 531 } 532 533 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) : 534 xp_check_aligned(pool, &addr); 535 if (!ok) { 536 pool->fq->invalid_descs++; 537 xskq_cons_release(pool->fq); 538 continue; 539 } 540 break; 541 } 542 543 if (pool->unaligned) { 544 xskb = pool->free_heads[--pool->free_heads_cnt]; 545 xp_init_xskb_addr(xskb, pool, addr); 546 if (pool->dma_pages_cnt) 547 xp_init_xskb_dma(xskb, pool, pool->dma_pages, addr); 548 } else { 549 xskb = &pool->heads[xp_aligned_extract_idx(pool, addr)]; 550 } 551 552 xskq_cons_release(pool->fq); 553 return xskb; 554 } 555 556 struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool) 557 { 558 struct xdp_buff_xsk *xskb; 559 560 if (!pool->free_list_cnt) { 561 xskb = __xp_alloc(pool); 562 if (!xskb) 563 return NULL; 564 } else { 565 pool->free_list_cnt--; 566 xskb = list_first_entry(&pool->free_list, struct xdp_buff_xsk, 567 free_list_node); 568 list_del_init(&xskb->free_list_node); 569 } 570 571 xskb->xdp.data = xskb->xdp.data_hard_start + XDP_PACKET_HEADROOM; 572 xskb->xdp.data_meta = xskb->xdp.data; 573 574 if (pool->dma_need_sync) { > 575 if (is_virtio_device(pool->dev)) > 576 virtio_dma_sync_signle_range_for_device(pool->dev, xskb->dma, 0, 577 pool->frame_len, 578 DMA_BIDIRECTIONAL); 579 else 580 dma_sync_single_range_for_device(pool->dev, xskb->dma, 0, 581 pool->frame_len, 582 DMA_BIDIRECTIONAL); 583 } 584 return &xskb->xdp; 585 } 586 EXPORT_SYMBOL(xp_alloc); 587 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
