From patchwork Wed Sep 19 12:36:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurentiu Tudor X-Patchwork-Id: 10605817 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 9DCEC14BD for ; Wed, 19 Sep 2018 12:49:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8DA5C2C073 for ; Wed, 19 Sep 2018 12:49:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7FE512C089; Wed, 19 Sep 2018 12:49:50 +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 C7F262C073 for ; Wed, 19 Sep 2018 12:49:49 +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=vxtWOyJcdneI925I+aWjSORGD3Sc7brc50ugELIpa4Q=; b=m+tWrmnpt+h7ur3H/I/I0lH0Y+ Dzccd+ynqZVNJOYjKt8TwzPQrvYWOiagdbdW9vkT2fP/dRaDHf27kIZ74SdzQNv3hh+O2x6/zBZLV b1V3vYOhWytnVk+wDaSmZ55yc38OS7bdDu5rDi+oUjEPv6VPWiapQTw6uu2S3mduiuZAZ7+wMIreN hzm2p0mExsGni7DMtmSGKYSxy+nfdk9IHRmmgd7NkUPJqS7cJx9lN2nrFV64YxbvPLo5oC4vn7wrF +JA4H+fWDK1hmp8uoKj9o+Ptf0SNv8i4OpTid2CvLBbUx4ANoZfPIY70VMDwzof+g704epMbRShJy tOpaUnMw==; 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 1g2bvF-0006C6-8C; Wed, 19 Sep 2018 12:49:37 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g2bj2-0006q2-Gz for linux-arm-kernel@lists.infradead.org; Wed, 19 Sep 2018 12:37:40 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 915A91A0200; Wed, 19 Sep 2018 14:36:41 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 842DB1A01FA; Wed, 19 Sep 2018 14:36:41 +0200 (CEST) Received: from fsr-ub1864-101.ea.freescale.net (fsr-ub1864-101.ea.freescale.net [10.171.82.97]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 4378F20618; Wed, 19 Sep 2018 14:36:40 +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 Subject: [PATCH 14/21] dpaa_eth: fix iova handling for sg frames Date: Wed, 19 Sep 2018 15:36:06 +0300 Message-Id: <20180919123613.15092-15-laurentiu.tudor@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180919123613.15092-1-laurentiu.tudor@nxp.com> References: <20180919123613.15092-1-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-20180919_053700_927569_25663CBB X-CRM114-Status: GOOD ( 12.83 ) 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: madalin.bucur@nxp.com, roy.pledge@nxp.com, leoyang.li@nxp.com, shawnguo@kernel.org, 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 also for scatter-gather frames using the iova -> phys conversion function added in the previous patch. While at it, clean-up a redundant dpaa_bpid2pool() and pass the bp as parameter. Signed-off-by: Laurentiu Tudor --- .../net/ethernet/freescale/dpaa/dpaa_eth.c | 41 +++++++++++-------- 1 file changed, 24 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c index e9e081c3f8cc..8db861f281a0 100644 --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c @@ -1646,14 +1646,17 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv, if (unlikely(qm_fd_get_format(fd) == qm_fd_sg)) { nr_frags = skb_shinfo(skb)->nr_frags; - dma_unmap_single(dev, addr, - qm_fd_get_offset(fd) + DPAA_SGT_SIZE, - dma_dir); /* The sgt buffer has been allocated with netdev_alloc_frag(), * it's from lowmem. */ - sgt = phys_to_virt(addr + qm_fd_get_offset(fd)); + sgt = phys_to_virt(dpaa_iova_to_phys(dev, + addr + + qm_fd_get_offset(fd))); + + dma_unmap_single(dev, addr, + qm_fd_get_offset(fd) + DPAA_SGT_SIZE, + dma_dir); /* sgt[0] is from lowmem, was dma_map_single()-ed */ dma_unmap_single(dev, qm_sg_addr(&sgt[0]), @@ -1668,7 +1671,7 @@ static struct sk_buff *dpaa_cleanup_tx_fd(const struct dpaa_priv *priv, } /* Free the page frag that we allocated on Tx */ - skb_free_frag(phys_to_virt(addr)); + skb_free_frag(skbh); } else { dma_unmap_single(dev, addr, skb_tail_pointer(skb) - (u8 *)skbh, dma_dir); @@ -1729,14 +1732,14 @@ static struct sk_buff *contig_fd_to_skb(const struct dpaa_priv *priv, * The page fragment holding the S/G Table is recycled here. */ static struct sk_buff *sg_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); const struct qm_sg_entry *sgt; struct page *page, *head_page; - struct dpaa_bp *dpaa_bp; - void *vaddr, *sg_vaddr; + void *sg_vaddr; int frag_off, frag_len; struct sk_buff *skb; dma_addr_t sg_addr; @@ -1745,7 +1748,6 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, int *count_ptr; int i; - vaddr = phys_to_virt(addr); WARN_ON(!IS_ALIGNED((unsigned long)vaddr, SMP_CACHE_BYTES)); /* Iterate through the SGT entries and add data buffers to the skb */ @@ -1756,14 +1758,18 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, WARN_ON(qm_sg_entry_is_ext(&sgt[i])); sg_addr = qm_sg_addr(&sgt[i]); - sg_vaddr = phys_to_virt(sg_addr); - WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr, - SMP_CACHE_BYTES)); /* We may use multiple Rx pools */ dpaa_bp = dpaa_bpid2pool(sgt[i].bpid); - if (!dpaa_bp) + if (!dpaa_bp) { + pr_info("%s: fail to get dpaa_bp for sg bpid %d\n", + __func__, sgt[i].bpid); goto free_buffers; + } + sg_vaddr = phys_to_virt(dpaa_iova_to_phys(dpaa_bp->dev, + sg_addr)); + WARN_ON(!IS_ALIGNED((unsigned long)sg_vaddr, + SMP_CACHE_BYTES)); count_ptr = this_cpu_ptr(dpaa_bp->percpu_count); dma_unmap_single(dpaa_bp->dev, sg_addr, dpaa_bp->size, @@ -1835,10 +1841,11 @@ static struct sk_buff *sg_fd_to_skb(const struct dpaa_priv *priv, /* free all the SG entries */ for (i = 0; i < DPAA_SGT_MAX_ENTRIES ; i++) { sg_addr = qm_sg_addr(&sgt[i]); - sg_vaddr = phys_to_virt(sg_addr); - skb_free_frag(sg_vaddr); dpaa_bp = dpaa_bpid2pool(sgt[i].bpid); if (dpaa_bp) { + sg_addr = dpaa_iova_to_phys(dpaa_bp->dev, sg_addr); + sg_vaddr = phys_to_virt(sg_addr); + skb_free_frag(sg_vaddr); count_ptr = this_cpu_ptr(dpaa_bp->percpu_count); (*count_ptr)--; } @@ -2324,7 +2331,7 @@ static enum qman_cb_dqrr_result rx_default_dqrr(struct qman_portal *portal, if (likely(fd_format == qm_fd_contig)) skb = contig_fd_to_skb(priv, fd, dpaa_bp, vaddr); else - skb = sg_fd_to_skb(priv, fd); + skb = sg_fd_to_skb(priv, fd, dpaa_bp, vaddr); if (!skb) return qman_cb_dqrr_consume;