From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BE90918C09 for ; Mon, 31 Jul 2023 14:21:17 +0000 (UTC) Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05B1CB3 for ; Mon, 31 Jul 2023 07:21:16 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id d2e1a72fcca58-686efa1804eso3199815b3a.3 for ; Mon, 31 Jul 2023 07:21:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1690813275; x=1691418075; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=qb+UofH4ZA/Hg1FUv3Yuc6s26yCrwMyhAhKosqSojLk=; b=WvCsNQPQREb73SeTsy2U2ZlQcxu1scD9kyl4jVXsK6jv/gvy2cQbhLD9OQdE3j9ki6 eykuUopj+NmnO4CwYA9nnAHcxctxzxRoxqHbstNAuj1CztcwB3vXnvUAC/wZSE7Q3A2J dDv6RYBbETldlTKLwlGkVG1og6Eqe265Wsqks= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690813275; x=1691418075; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=qb+UofH4ZA/Hg1FUv3Yuc6s26yCrwMyhAhKosqSojLk=; b=k/nKxdPFDcaxbcpGIbK/Lmnh1VkBH4H2Z5z4vhXUKCwoSx6BuSB5CEPQ6W5EJDqMkl QHglrx6xK03YH6/QZ7zH6BimXzB7imk/1RyB/POzectvJlhYCYUNADr7SGI0wn2dqBZp BPhH3hTwHuTo7ubwsvKlG1djCI1o8Q/FSIuW+o7EwwKYAVUrHz51oTgznv4jZLn2H7B/ LBvG0nudCwJ5yKP9do+RAFBWE6UJ7bIbHwoo2hwKWDFmTFDRJDFfYM1/KaTTVQIukrv+ J1F7U4gFtc/RisOzQURzX+HKj41kTKlBnKx71Hs35PCsA+jGh6NGIooKaeGzNJJeZZC5 WlvQ== X-Gm-Message-State: ABy/qLZwBuDFNZHGPit8QL72cmOXITxNuyyz7AIfttx62YJVHebpSBVU XGS+Z/kkOYJXd/BY8k0cEPYunQ== X-Google-Smtp-Source: APBJJlG16Wo/MGvRwPgSvHy+/AwOjJxcpigjRG4GcdDpDJ1lOW0Ob45vuH+pR1d3+TUMCHcEVwc6Rg== X-Received: by 2002:a05:6a00:240a:b0:682:b6c8:2eb with SMTP id z10-20020a056a00240a00b00682b6c802ebmr11184039pfh.1.1690813274749; Mon, 31 Jul 2023 07:21:14 -0700 (PDT) Received: from lvnvda5233.lvn.broadcom.net ([192.19.161.250]) by smtp.gmail.com with ESMTPSA id k12-20020aa790cc000000b00682c1db7551sm5509924pfk.49.2023.07.31.07.21.13 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 31 Jul 2023 07:21:13 -0700 (PDT) From: Michael Chan To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, gospo@broadcom.com, bpf@vger.kernel.org, somnath.kotur@broadcom.com, Andy Gospodarek Subject: [PATCH net 1/2] bnxt_en: Fix page pool logic for page size >= 64K Date: Mon, 31 Jul 2023 07:20:42 -0700 Message-Id: <20230731142043.58855-2-michael.chan@broadcom.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20230731142043.58855-1-michael.chan@broadcom.com> References: <20230731142043.58855-1-michael.chan@broadcom.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000aef4760601c92407" X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net --000000000000aef4760601c92407 Content-Transfer-Encoding: 8bit From: Somnath Kotur The RXBD length field on all bnxt chips is 16-bit and so we cannot support a full page when the native page size is 64K or greater. The non-XDP (non page pool) code path has logic to handle this but the XDP page pool code path does not handle this. Add the missing logic to use page_pool_dev_alloc_frag() to allocate 32K chunks if the page size is 64K or greater. Fixes: 9f4b28301ce6 ("bnxt: XDP multibuffer enablement") Link: https://lore.kernel.org/netdev/20230728231829.235716-2-michael.chan@broadcom.com/ Reviewed-by: Andy Gospodarek Signed-off-by: Somnath Kotur Signed-off-by: Michael Chan --- v2: - Resubmit to net since it is a bug fix - Fix some lines > 80 characters - Fix reverse xmas tree style --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 42 ++++++++++++------- drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 6 +-- 2 files changed, 29 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index e5b54e6025be..13662b114f90 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -697,17 +697,24 @@ static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts) static struct page *__bnxt_alloc_rx_page(struct bnxt *bp, dma_addr_t *mapping, struct bnxt_rx_ring_info *rxr, + unsigned int *offset, gfp_t gfp) { struct device *dev = &bp->pdev->dev; struct page *page; - page = page_pool_dev_alloc_pages(rxr->page_pool); + if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) { + page = page_pool_dev_alloc_frag(rxr->page_pool, offset, + BNXT_RX_PAGE_SIZE); + } else { + page = page_pool_dev_alloc_pages(rxr->page_pool); + *offset = 0; + } if (!page) return NULL; - *mapping = dma_map_page_attrs(dev, page, 0, PAGE_SIZE, bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); + *mapping = dma_map_page_attrs(dev, page, *offset, BNXT_RX_PAGE_SIZE, + bp->rx_dir, DMA_ATTR_WEAK_ORDERING); if (dma_mapping_error(dev, *mapping)) { page_pool_recycle_direct(rxr->page_pool, page); return NULL; @@ -747,15 +754,16 @@ int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, dma_addr_t mapping; if (BNXT_RX_PAGE_MODE(bp)) { + unsigned int offset; struct page *page = - __bnxt_alloc_rx_page(bp, &mapping, rxr, gfp); + __bnxt_alloc_rx_page(bp, &mapping, rxr, &offset, gfp); if (!page) return -ENOMEM; mapping += bp->rx_dma_offset; rx_buf->data = page; - rx_buf->data_ptr = page_address(page) + bp->rx_offset; + rx_buf->data_ptr = page_address(page) + offset + bp->rx_offset; } else { u8 *data = __bnxt_alloc_rx_frag(bp, &mapping, gfp); @@ -815,7 +823,7 @@ static inline int bnxt_alloc_rx_page(struct bnxt *bp, unsigned int offset = 0; if (BNXT_RX_PAGE_MODE(bp)) { - page = __bnxt_alloc_rx_page(bp, &mapping, rxr, gfp); + page = __bnxt_alloc_rx_page(bp, &mapping, rxr, &offset, gfp); if (!page) return -ENOMEM; @@ -962,15 +970,15 @@ static struct sk_buff *bnxt_rx_multi_page_skb(struct bnxt *bp, return NULL; } dma_addr -= bp->rx_dma_offset; - dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, PAGE_SIZE, bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); - skb = build_skb(page_address(page), PAGE_SIZE); + dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, + bp->rx_dir, DMA_ATTR_WEAK_ORDERING); + skb = build_skb(data_ptr - bp->rx_offset, BNXT_RX_PAGE_SIZE); if (!skb) { page_pool_recycle_direct(rxr->page_pool, page); return NULL; } skb_mark_for_recycle(skb); - skb_reserve(skb, bp->rx_dma_offset); + skb_reserve(skb, bp->rx_offset); __skb_put(skb, len); return skb; @@ -996,8 +1004,8 @@ static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, return NULL; } dma_addr -= bp->rx_dma_offset; - dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, PAGE_SIZE, bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); + dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, + bp->rx_dir, DMA_ATTR_WEAK_ORDERING); if (unlikely(!payload)) payload = eth_get_headlen(bp->dev, data_ptr, len); @@ -1010,7 +1018,7 @@ static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, skb_mark_for_recycle(skb); off = (void *)data_ptr - page_address(page); - skb_add_rx_frag(skb, 0, page, off, len, PAGE_SIZE); + skb_add_rx_frag(skb, 0, page, off, len, BNXT_RX_PAGE_SIZE); memcpy(skb->data - NET_IP_ALIGN, data_ptr - NET_IP_ALIGN, payload + NET_IP_ALIGN); @@ -1141,7 +1149,7 @@ static struct sk_buff *bnxt_rx_agg_pages_skb(struct bnxt *bp, skb->data_len += total_frag_len; skb->len += total_frag_len; - skb->truesize += PAGE_SIZE * agg_bufs; + skb->truesize += BNXT_RX_PAGE_SIZE * agg_bufs; return skb; } @@ -2943,8 +2951,8 @@ static void bnxt_free_one_rx_ring_skbs(struct bnxt *bp, int ring_nr) rx_buf->data = NULL; if (BNXT_RX_PAGE_MODE(bp)) { mapping -= bp->rx_dma_offset; - dma_unmap_page_attrs(&pdev->dev, mapping, PAGE_SIZE, - bp->rx_dir, + dma_unmap_page_attrs(&pdev->dev, mapping, + BNXT_RX_PAGE_SIZE, bp->rx_dir, DMA_ATTR_WEAK_ORDERING); page_pool_recycle_direct(rxr->page_pool, data); } else { @@ -3213,6 +3221,8 @@ static int bnxt_alloc_rx_page_pool(struct bnxt *bp, pp.napi = &rxr->bnapi->napi; pp.dev = &bp->pdev->dev; pp.dma_dir = DMA_BIDIRECTIONAL; + if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) + pp.flags |= PP_FLAG_PAGE_FRAG; rxr->page_pool = page_pool_create(&pp); if (IS_ERR(rxr->page_pool)) { diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c index 4efa5fe6972b..902b36a99b2e 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c @@ -180,8 +180,8 @@ void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons, u8 *data_ptr, unsigned int len, struct xdp_buff *xdp) { + u32 buflen = BNXT_RX_PAGE_SIZE; struct bnxt_sw_rx_bd *rx_buf; - u32 buflen = PAGE_SIZE; struct pci_dev *pdev; dma_addr_t mapping; u32 offset; @@ -297,7 +297,7 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons, rx_buf = &rxr->rx_buf_ring[cons]; mapping = rx_buf->mapping - bp->rx_dma_offset; dma_unmap_page_attrs(&pdev->dev, mapping, - PAGE_SIZE, bp->rx_dir, + BNXT_RX_PAGE_SIZE, bp->rx_dir, DMA_ATTR_WEAK_ORDERING); /* if we are unable to allocate a new buffer, abort and reuse */ @@ -480,7 +480,7 @@ bnxt_xdp_build_skb(struct bnxt *bp, struct sk_buff *skb, u8 num_frags, } xdp_update_skb_shared_info(skb, num_frags, sinfo->xdp_frags_size, - PAGE_SIZE * sinfo->nr_frags, + BNXT_RX_PAGE_SIZE * sinfo->nr_frags, 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