From patchwork Wed Oct 10 12:07:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurentiu Tudor X-Patchwork-Id: 10634455 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D53A93CF1 for ; Wed, 10 Oct 2018 12:13:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 39F8C1FF65 for ; Wed, 10 Oct 2018 12:13:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2C7FA1FE8A; Wed, 10 Oct 2018 12:13:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A06731FE8A for ; Wed, 10 Oct 2018 12:13:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=AiymOG28NKo13p/S8ev+I5IkubanTdCxZavPPdko1yk=; b=LJd5lRpTnmc5z8E2hQCtsZ+9qo It0E+b5x2xSlCoh8WQzo29VgKy6R9S0QscnxYWH/Wa90YL3AKWEElNgQ26mGeAZqV84DSuLNUVtAf Nfb3mxkB37S8rX4mMec3Y5Wq7KAyRcfpqUeu7xg1ET3hSQveu/pFz8ocL/L+qzupGQjOGCAX6BXVP /Ar0vbkrI8EXQd3rGK4+dPgupPIf+eZRAmETgblHc2iaIef1zcNYgnkfqPPI2NnaEIUlbhAjXSGFd /oahKDU9iLJe2TaxlHtD/SXaGubG3Av7fC9Cb5EAKi/8IDLcpieMLofJOUgBtiBxwDuhzlHK9j6tj eIv+FkRg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gADMd-00022o-Q3; Wed, 10 Oct 2018 12:13:19 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gADHX-0006uq-AE for linux-arm-kernel@lists.infradead.org; Wed, 10 Oct 2018 12:08:16 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 500C2200162; Wed, 10 Oct 2018 14:07:56 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 4335C20009C; Wed, 10 Oct 2018 14:07:56 +0200 (CEST) Received: from fsr-ub1864-101.ea.freescale.net (fsr-ub1864-101.ea.freescale.net [10.171.82.46]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 8BC2420604; Wed, 10 Oct 2018 14:07:55 +0200 (CEST) From: laurentiu.tudor@nxp.com To: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm@kernel.org Subject: [PATCH v3 13/22] dpaa_eth: fix iova handling for contiguous frames Date: Wed, 10 Oct 2018 15:07:28 +0300 Message-Id: <20181010120737.30300-11-laurentiu.tudor@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181010120737.30300-1-laurentiu.tudor@nxp.com> References: <20181010120737.30300-1-laurentiu.tudor@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181010_050803_633201_6FD7DF67 X-CRM114-Status: GOOD ( 14.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: arnd@arndb.de, bharat.bhushan@nxp.com, madalin.bucur@nxp.com, shawnguo@kernel.org, roy.pledge@nxp.com, leoyang.li@nxp.com, robin.murphy@arm.com, davem@davemloft.net, Laurentiu Tudor MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Laurentiu Tudor The driver relies on the no longer valid assumption that dma addresses (iovas) are identical to physical addressees and uses phys_to_virt() to make iova -> vaddr conversions. Fix this by adding a function that does proper iova -> phys conversions using the iommu api and update the code to use it. Also, a dma_unmap_single() call had to be moved further down the code because iova -> vaddr conversions were required before the unmap. For now only the contiguous frame case is handled and the SG case is split in a following patch. While at it, clean-up a redundant dpaa_bpid2pool() and pass the bp as parameter. Signed-off-by: Laurentiu Tudor Acked-by: Madalin Bucur --- .../net/ethernet/freescale/dpaa/dpaa_eth.c | 44 ++++++++++--------- 1 file changed, 24 insertions(+), 20 deletions(-) diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c index 0dc0267844ca..a9227456f67e 100644 --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c @@ -50,6 +50,7 @@ #include #include #include +#include #include #include #include @@ -1595,6 +1596,17 @@ static int dpaa_eth_refill_bpools(struct dpaa_priv *priv) return 0; } +static phys_addr_t dpaa_iova_to_phys(struct device *dev, dma_addr_t addr) +{ + struct iommu_domain *domain; + + domain = iommu_get_domain_for_dev(dev); + if (domain) + return iommu_iova_to_phys(domain, addr); + else + return addr; +} + /* Cleanup function for outgoing frame descriptors that were built on Tx path, * either contiguous frames or scatter/gather ones. * Skb freeing is not handled here. @@ -1617,7 +1629,7 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv, int nr_frags, i; u64 ns; - skbh = (struct sk_buff **)phys_to_virt(addr); + skbh = (struct sk_buff **)phys_to_virt(dpaa_iova_to_phys(dev, addr)); skb = *skbh; if (priv->tx_tstamp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { @@ -1687,25 +1699,21 @@ static u8 rx_csum_offload(const struct dpaa_priv *priv, const struct qm_fd *fd) * accommodate the shared info area of the skb. */ static struct sk_buff *contig_fd_to_skb(const struct dpaa_priv *priv, - const struct qm_fd *fd) + const struct qm_fd *fd, + struct dpaa_bp *dpaa_bp, + void *vaddr) { ssize_t fd_off = qm_fd_get_offset(fd); - dma_addr_t addr = qm_fd_addr(fd); - struct dpaa_bp *dpaa_bp; struct sk_buff *skb; - void *vaddr; - vaddr = phys_to_virt(addr); WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES)); - dpaa_bp = dpaa_bpid2pool(fd->bpid); - if (!dpaa_bp) - goto free_buffer; - skb = build_skb(vaddr, dpaa_bp->size + SKB_DATA_ALIGN(sizeof(struct skb_shared_info))); - if (WARN_ONCE(!skb, "Build skb failure on Rx\n")) - goto free_buffer; + if (WARN_ONCE(!skb, "Build skb failure on Rx\n")) { + skb_free_frag(vaddr); + return NULL; + } WARN_ON(fd_off != priv->rx_headroom); skb_reserve(skb, fd_off); skb_put(skb, qm_fd_get_length(fd)); @@ -1713,10 +1721,6 @@ static struct sk_buff *contig_fd_to_skb(const struct dpaa_priv *priv, skb->ip_summed = rx_csum_offload(priv, fd); return skb; - -free_buffer: - skb_free_frag(vaddr); - return NULL; } /* Build an skb with the data of the first S/G entry in the linear portion and @@ -2303,12 +2307,12 @@ static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal, if (!dpaa_bp) return qman_cb_dqrr_consume; - dma_unmap_single(dpaa_bp->dev, addr, dpaa_bp->size, DMA_FROM_DEVICE); - /* prefetch the first 64 bytes of the frame or the SGT start */ - vaddr = phys_to_virt(addr); + vaddr = phys_to_virt(dpaa_iova_to_phys(dpaa_bp->dev, addr)); prefetch(vaddr + qm_fd_get_offset(fd)); + dma_unmap_single(dpaa_bp->dev, addr, dpaa_bp->size, DMA_FROM_DEVICE); + /* The only FD types that we may receive are contig and S/G */ WARN_ON((fd_format != qm_fd_contig) && (fd_format != qm_fd_sg)); @@ -2319,7 +2323,7 @@ static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal, (*count_ptr)--; if (likely(fd_format == qm_fd_contig)) - skb = contig_fd_to_skb(priv, fd); + skb = contig_fd_to_skb(priv, fd, dpaa_bp, vaddr); else skb = sg_fd_to_skb(priv, fd); if (!skb)