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Message-Id: <20230328205623.142075-5-saeed@kernel.org> Date: Tue, 28 Mar 2023 13:56:12 -0700 From: Saeed Mahameed <saeed@...nel.org> To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com> Cc: Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org, Tariq Toukan <tariqt@...dia.com>, Jesper Dangaard Brouer <brouer@...hat.com>, Matthew Wilcox <willy@...radead.org>, Toke Høiland-Jørgensen <toke@...hat.com>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, Dragos Tatulea <dtatulea@...dia.com> Subject: [net-next 04/15] net/mlx5e: RX, Store SHAMPO header pages in array From: Dragos Tatulea <dtatulea@...dia.com> Save allocated SHAMPO header pages to an array to which the mlx5e_dma_info page will point to. This change is a preparation for introducing mlx5e_frag_page structure in a downstream patch. There's no new functionality introduced. Signed-off-by: Dragos Tatulea <dtatulea@...dia.com> Reviewed-by: Tariq Toukan <tariqt@...dia.com> Signed-off-by: Saeed Mahameed <saeedm@...dia.com> --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 8 +++- .../net/ethernet/mellanox/mlx5/core/en_main.c | 21 ++++++---- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 42 +++++++++++-------- 3 files changed, 45 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h index ad4ad14853bf..b38fbacbb4d1 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h @@ -670,13 +670,17 @@ struct mlx5e_rq_frags_info { struct mlx5e_dma_info { dma_addr_t addr; - struct page *page; + union { + struct page **pagep; + struct page *page; + }; }; struct mlx5e_shampo_hd { u32 mkey; struct mlx5e_dma_info *info; - struct page *last_page; + struct page **pages; + u16 curr_page_index; u16 hd_per_wq; u16 hd_per_wqe; unsigned long *bitmap; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 0ed3f67f7dfc..77f81d74ff30 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -262,23 +262,30 @@ static int mlx5e_rq_shampo_hd_info_alloc(struct mlx5e_rq *rq, int node) shampo->bitmap = bitmap_zalloc_node(shampo->hd_per_wq, GFP_KERNEL, node); - if (!shampo->bitmap) - return -ENOMEM; - shampo->info = kvzalloc_node(array_size(shampo->hd_per_wq, sizeof(*shampo->info)), GFP_KERNEL, node); - if (!shampo->info) { - kvfree(shampo->bitmap); - return -ENOMEM; - } + shampo->pages = kvzalloc_node(array_size(shampo->hd_per_wq, + sizeof(*shampo->pages)), + GFP_KERNEL, node); + if (!shampo->bitmap || !shampo->info || !shampo->pages) + goto err_nomem; + return 0; + +err_nomem: + kvfree(shampo->info); + kvfree(shampo->bitmap); + kvfree(shampo->pages); + + return -ENOMEM; } static void mlx5e_rq_shampo_hd_info_free(struct mlx5e_rq *rq) { kvfree(rq->mpwqe.shampo->bitmap); kvfree(rq->mpwqe.shampo->info); + kvfree(rq->mpwqe.shampo->pages); } static int mlx5e_rq_alloc_mpwqe_info(struct mlx5e_rq *rq, int node) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index d02f2f2af4ec..7057db954f6f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -586,10 +586,11 @@ static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq, struct mlx5e_shampo_hd *shampo = rq->mpwqe.shampo; u16 entries, pi, header_offset, err, wqe_bbs, new_entries; u32 lkey = rq->mdev->mlx5e_res.hw_objs.mkey; - struct page *page = shampo->last_page; + u16 page_index = shampo->curr_page_index; u64 addr = shampo->last_addr; struct mlx5e_dma_info *dma_info; struct mlx5e_umr_wqe *umr_wqe; + struct page **pagep; int headroom, i; headroom = rq->buff.headroom; @@ -600,6 +601,8 @@ static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq, umr_wqe = mlx5_wq_cyc_get_wqe(&sq->wq, pi); build_klm_umr(sq, umr_wqe, shampo->key, index, entries, wqe_bbs); + pagep = &shampo->pages[page_index]; + for (i = 0; i < entries; i++, index++) { dma_info = &shampo->info[index]; if (i >= klm_entries || (index < shampo->pi && shampo->pi - index < @@ -608,17 +611,20 @@ static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq, header_offset = (index & (MLX5E_SHAMPO_WQ_HEADER_PER_PAGE - 1)) << MLX5E_SHAMPO_LOG_MAX_HEADER_ENTRY_SIZE; if (!(header_offset & (PAGE_SIZE - 1))) { + page_index = (page_index + 1) & (shampo->hd_per_wq - 1); + pagep = &shampo->pages[page_index]; - err = mlx5e_page_alloc_pool(rq, &page); + err = mlx5e_page_alloc_pool(rq, pagep); if (unlikely(err)) goto err_unmap; - addr = page_pool_get_dma_addr(page); + addr = page_pool_get_dma_addr(*pagep); + dma_info->addr = addr; - dma_info->page = page; + dma_info->pagep = pagep; } else { dma_info->addr = addr + header_offset; - dma_info->page = page; + dma_info->pagep = pagep; } update_klm: @@ -636,7 +642,7 @@ static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq, }; shampo->pi = (shampo->pi + new_entries) & (shampo->hd_per_wq - 1); - shampo->last_page = page; + shampo->curr_page_index = page_index; shampo->last_addr = addr; sq->pc += wqe_bbs; sq->doorbell_cseg = &umr_wqe->ctrl; @@ -648,7 +654,7 @@ static int mlx5e_build_shampo_hd_umr(struct mlx5e_rq *rq, dma_info = &shampo->info[--index]; if (!(i & (MLX5E_SHAMPO_WQ_HEADER_PER_PAGE - 1))) { dma_info->addr = ALIGN_DOWN(dma_info->addr, PAGE_SIZE); - mlx5e_page_release_dynamic(rq, dma_info->page, true); + mlx5e_page_release_dynamic(rq, *dma_info->pagep, true); } } rq->stats->buff_alloc_err++; @@ -783,7 +789,7 @@ void mlx5e_shampo_dealloc_hd(struct mlx5e_rq *rq, u16 len, u16 start, bool close { struct mlx5e_shampo_hd *shampo = rq->mpwqe.shampo; int hd_per_wq = shampo->hd_per_wq; - struct page *deleted_page = NULL; + struct page **deleted_page = NULL; struct mlx5e_dma_info *hd_info; int i, index = start; @@ -796,9 +802,9 @@ void mlx5e_shampo_dealloc_hd(struct mlx5e_rq *rq, u16 len, u16 start, bool close hd_info = &shampo->info[index]; hd_info->addr = ALIGN_DOWN(hd_info->addr, PAGE_SIZE); - if (hd_info->page != deleted_page) { - deleted_page = hd_info->page; - mlx5e_page_release_dynamic(rq, hd_info->page, false); + if (hd_info->pagep != deleted_page) { + deleted_page = hd_info->pagep; + mlx5e_page_release_dynamic(rq, *hd_info->pagep, false); } } @@ -1137,7 +1143,7 @@ static void *mlx5e_shampo_get_packet_hd(struct mlx5e_rq *rq, u16 header_index) struct mlx5e_dma_info *last_head = &rq->mpwqe.shampo->info[header_index]; u16 head_offset = (last_head->addr & (PAGE_SIZE - 1)) + rq->buff.headroom; - return page_address(last_head->page) + head_offset; + return page_address(*last_head->pagep) + head_offset; } static void mlx5e_shampo_update_ipv4_udp_hdr(struct mlx5e_rq *rq, struct iphdr *ipv4) @@ -2048,7 +2054,7 @@ mlx5e_skb_from_cqe_shampo(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, void *hdr, *data; u32 frag_size; - hdr = page_address(head->page) + head_offset; + hdr = page_address(*head->pagep) + head_offset; data = hdr + rx_headroom; frag_size = MLX5_SKB_FRAG_SZ(rx_headroom + head_size); @@ -2063,7 +2069,7 @@ mlx5e_skb_from_cqe_shampo(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, return NULL; /* queue up for recycling/reuse */ - page_ref_inc(head->page); + page_ref_inc(*head->pagep); } else { /* allocate SKB and copy header for large header */ @@ -2076,7 +2082,7 @@ mlx5e_skb_from_cqe_shampo(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, } prefetchw(skb->data); - mlx5e_copy_skb_header(rq, skb, head->page, head->addr, + mlx5e_copy_skb_header(rq, skb, *head->pagep, head->addr, head_offset + rx_headroom, rx_headroom, head_size); /* skb linear part was allocated with headlen and aligned to long */ @@ -2127,8 +2133,10 @@ mlx5e_free_rx_shampo_hd_entry(struct mlx5e_rq *rq, u16 header_index) u64 addr = shampo->info[header_index].addr; if (((header_index + 1) & (MLX5E_SHAMPO_WQ_HEADER_PER_PAGE - 1)) == 0) { - shampo->info[header_index].addr = ALIGN_DOWN(addr, PAGE_SIZE); - mlx5e_page_release_dynamic(rq, shampo->info[header_index].page, true); + struct mlx5e_dma_info *dma_info = &shampo->info[header_index]; + + dma_info->addr = ALIGN_DOWN(addr, PAGE_SIZE); + mlx5e_page_release_dynamic(rq, *dma_info->pagep, true); } bitmap_clear(shampo->bitmap, header_index, 1); } -- 2.39.2
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