Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753545AbdLHMtH (ORCPT ); Fri, 8 Dec 2017 07:49:07 -0500 Received: from mail-sn1nam01on0089.outbound.protection.outlook.com ([104.47.32.89]:25130 "EHLO NAM01-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752965AbdLHMsB (ORCPT ); Fri, 8 Dec 2017 07:48:01 -0500 Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=nxp.com; nxp.com; dkim=none (message not signed) header.d=none;nxp.com; dmarc=fail action=none header.from=nxp.com; From: Ioana Radulescu To: CC: , , Subject: [PATCH 4/6] staging: fsl-dpaa2/eth: Don't enable FAS on Tx Date: Fri, 8 Dec 2017 06:47:56 -0600 Message-ID: <20171208124758.2732-5-ruxandra.radulescu@nxp.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171208124758.2732-1-ruxandra.radulescu@nxp.com> References: <20171208124758.2732-1-ruxandra.radulescu@nxp.com> X-EOPAttributedMessage: 0 X-Matching-Connectors: 131572108772733739;(91ab9b29-cfa4-454e-5278-08d120cd25b8);() X-Forefront-Antispam-Report: CIP:192.88.168.50;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(336005)(376002)(39860400002)(39380400002)(346002)(2980300002)(1109001)(1110001)(339900001)(199004)(22813001)(189003)(86362001)(50226002)(2950100002)(6666003)(8936002)(5660300001)(85426001)(8656006)(1076002)(6916009)(2906002)(104016004)(68736007)(50466002)(48376002)(81156014)(33646002)(81166006)(8676002)(51416003)(97736004)(77096006)(76176011)(305945005)(16586007)(2351001)(356003)(316002)(47776003)(53936002)(4326008)(105606002)(54906003)(106466001)(498600001)(36756003);DIR:OUT;SFP:1101;SCL:1;SRVR:SN2PR03MB2366;H:tx30smr01.am.freescale.net;FPR:;SPF:Fail;PTR:InfoDomainNonexistent;A:1;MX:1;LANG:en; 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While useful in initial development stages, it doesn't bring enough added value to justify reserving 64B of headroom for all Tx frames (FAS is only 8B long, but we must reserve chunks of 64B from the hardware annotation area). If we remove the need for FAS field from egress frames, we can renounce hardware annotation completely, since FAS is the only HWA field we currently use. Signed-off-by: Ioana Radulescu --- drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 73 +++++--------------------- drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h | 6 --- 2 files changed, 13 insertions(+), 66 deletions(-) diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c index 6de6cdd..2c12859 100644 --- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c +++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c @@ -348,7 +348,6 @@ static int build_sg_fd(struct dpaa2_eth_priv *priv, int num_sg; int num_dma_bufs; struct dpaa2_eth_swa *swa; - struct dpaa2_fas *fas; /* Create and map scatterlist. * We don't advertise NETIF_F_FRAGLIST, so skb_to_sgvec() will not have @@ -379,15 +378,6 @@ static int build_sg_fd(struct dpaa2_eth_priv *priv, goto sgt_buf_alloc_failed; } sgt_buf = PTR_ALIGN(sgt_buf, DPAA2_ETH_TX_BUF_ALIGN); - - /* PTA from egress side is passed as is to the confirmation side so - * we need to clear some fields here in order to find consistent values - * on TX confirmation. We are clearing FAS (Frame Annotation Status) - * field from the hardware annotation area - */ - fas = dpaa2_get_fas(sgt_buf, true); - memset(fas, 0, DPAA2_FAS_SIZE); - sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset); /* Fill in the HW SGT structure. @@ -424,8 +414,7 @@ static int build_sg_fd(struct dpaa2_eth_priv *priv, dpaa2_fd_set_format(fd, dpaa2_fd_sg); dpaa2_fd_set_addr(fd, addr); dpaa2_fd_set_len(fd, skb->len); - dpaa2_fd_set_ctrl(fd, DPAA2_FD_CTRL_ASAL | DPAA2_FD_CTRL_PTA | - DPAA2_FD_CTRL_PTV1); + dpaa2_fd_set_ctrl(fd, DPAA2_FD_CTRL_PTA | DPAA2_FD_CTRL_PTV1); return 0; @@ -445,21 +434,12 @@ static int build_single_fd(struct dpaa2_eth_priv *priv, { struct device *dev = priv->net_dev->dev.parent; u8 *buffer_start; - struct dpaa2_fas *fas; struct sk_buff **skbh; dma_addr_t addr; buffer_start = PTR_ALIGN(skb->data - dpaa2_eth_needed_headroom(priv), DPAA2_ETH_TX_BUF_ALIGN); - /* PTA from egress side is passed as is to the confirmation side so - * we need to clear some fields here in order to find consistent values - * on TX confirmation. We are clearing FAS (Frame Annotation Status) - * field from the hardware annotation area - */ - fas = dpaa2_get_fas(buffer_start, true); - memset(fas, 0, DPAA2_FAS_SIZE); - /* Store a backpointer to the skb at the beginning of the buffer * (in the private data area) such that we can release it * on Tx confirm @@ -477,8 +457,7 @@ static int build_single_fd(struct dpaa2_eth_priv *priv, dpaa2_fd_set_offset(fd, (u16)(skb->data - buffer_start)); dpaa2_fd_set_len(fd, skb->len); dpaa2_fd_set_format(fd, dpaa2_fd_single); - dpaa2_fd_set_ctrl(fd, DPAA2_FD_CTRL_ASAL | DPAA2_FD_CTRL_PTA | - DPAA2_FD_CTRL_PTV1); + dpaa2_fd_set_ctrl(fd, DPAA2_FD_CTRL_PTA | DPAA2_FD_CTRL_PTV1); return 0; } @@ -493,8 +472,7 @@ static int build_single_fd(struct dpaa2_eth_priv *priv, * to be checked if we're on the confirmation path. */ static void free_tx_fd(const struct dpaa2_eth_priv *priv, - const struct dpaa2_fd *fd, - u32 *status) + const struct dpaa2_fd *fd) { struct device *dev = priv->net_dev->dev.parent; dma_addr_t fd_addr; @@ -505,11 +483,9 @@ static void free_tx_fd(const struct dpaa2_eth_priv *priv, int num_sg, num_dma_bufs; struct dpaa2_eth_swa *swa; u8 fd_format = dpaa2_fd_get_format(fd); - struct dpaa2_fas *fas; fd_addr = dpaa2_fd_get_addr(fd); skbh = dpaa2_iova_to_virt(priv->iommu_domain, fd_addr); - fas = dpaa2_get_fas(skbh, true); if (fd_format == dpaa2_fd_single) { skb = *skbh; @@ -536,19 +512,10 @@ static void free_tx_fd(const struct dpaa2_eth_priv *priv, sizeof(struct dpaa2_sg_entry) * (1 + num_dma_bufs); dma_unmap_single(dev, fd_addr, unmap_size, DMA_BIDIRECTIONAL); } else { - /* Unsupported format, mark it as errored and give up */ - if (status) - *status = ~0; + netdev_dbg(priv->net_dev, "Invalid FD format\n"); return; } - /* Read the status from the Frame Annotation after we unmap the first - * buffer but before we free it. The caller function is responsible - * for checking the status value. - */ - if (status) - *status = le32_to_cpu(fas->status); - /* Free SGT buffer kmalloc'ed on tx */ if (fd_format != dpaa2_fd_single) kfree(skbh); @@ -627,7 +594,7 @@ static netdev_tx_t dpaa2_eth_tx(struct sk_buff *skb, struct net_device *net_dev) if (unlikely(err < 0)) { percpu_stats->tx_errors++; /* Clean up everything, including freeing the skb */ - free_tx_fd(priv, &fd, NULL); + free_tx_fd(priv, &fd); } else { percpu_stats->tx_packets++; percpu_stats->tx_bytes += dpaa2_fd_get_len(&fd); @@ -650,9 +617,7 @@ static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv, { struct rtnl_link_stats64 *percpu_stats; struct dpaa2_eth_drv_stats *percpu_extras; - u32 status = 0; u32 fd_errors; - bool has_fas_errors = false; /* Tracing point */ trace_dpaa2_tx_conf_fd(priv->net_dev, fd); @@ -663,29 +628,18 @@ static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv, /* Check frame errors in the FD field */ fd_errors = dpaa2_fd_get_ctrl(fd) & DPAA2_FD_TX_ERR_MASK; - if (unlikely(fd_errors)) { - /* We only check error bits in the FAS field if corresponding - * FAERR bit is set in FD and the FAS field is marked as valid - */ - has_fas_errors = (fd_errors & DPAA2_FD_CTRL_FAERR) && - !!(dpaa2_fd_get_frc(fd) & DPAA2_FD_FRC_FASV); - if (net_ratelimit()) - netdev_dbg(priv->net_dev, "TX frame FD error: 0x%08x\n", - fd_errors); - } - - free_tx_fd(priv, fd, has_fas_errors ? &status : NULL); + free_tx_fd(priv, fd); if (likely(!fd_errors)) return; + if (net_ratelimit()) + netdev_dbg(priv->net_dev, "TX frame FD error: 0x%08x\n", + fd_errors); + percpu_stats = this_cpu_ptr(priv->percpu_stats); /* Tx-conf logically pertains to the egress path. */ percpu_stats->tx_errors++; - - if (has_fas_errors && net_ratelimit()) - netdev_dbg(priv->net_dev, "TX frame FAS error: 0x%08x\n", - status & DPAA2_FAS_TX_ERR_MASK); } static int set_rx_csum(struct dpaa2_eth_priv *priv, bool enable) @@ -1791,10 +1745,8 @@ static int set_buffer_layout(struct dpaa2_eth_priv *priv) priv->rx_buf_align = DPAA2_ETH_RX_BUF_ALIGN; /* tx buffer */ - buf_layout.pass_frame_status = true; buf_layout.private_data_size = DPAA2_ETH_SWA_SIZE; - buf_layout.options = DPNI_BUF_LAYOUT_OPT_FRAME_STATUS | - DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE; + buf_layout.options = DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE; err = dpni_set_buffer_layout(priv->mc_io, 0, priv->mc_token, DPNI_QUEUE_TX, &buf_layout); if (err) { @@ -1803,7 +1755,7 @@ static int set_buffer_layout(struct dpaa2_eth_priv *priv) } /* tx-confirm buffer */ - buf_layout.options = DPNI_BUF_LAYOUT_OPT_FRAME_STATUS; + buf_layout.options = 0; err = dpni_set_buffer_layout(priv->mc_io, 0, priv->mc_token, DPNI_QUEUE_TX_CONFIRM, &buf_layout); if (err) { @@ -1826,6 +1778,7 @@ static int set_buffer_layout(struct dpaa2_eth_priv *priv) priv->tx_data_offset); /* rx buffer */ + buf_layout.pass_frame_status = true; buf_layout.pass_parser_result = true; buf_layout.data_align = priv->rx_buf_align; buf_layout.data_head_room = dpaa2_eth_rx_head_room(priv); diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h index 6940a98..546a862 100644 --- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h +++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h @@ -134,7 +134,6 @@ struct dpaa2_eth_swa { DPAA2_FD_CTRL_FAERR) /* Annotation bits in FD CTRL */ -#define DPAA2_FD_CTRL_ASAL 0x00010000 /* ASAL = 64 */ #define DPAA2_FD_CTRL_PTA 0x00800000 #define DPAA2_FD_CTRL_PTV1 0x00400000 @@ -208,11 +207,6 @@ static inline struct dpaa2_fas *dpaa2_get_fas(void *buf_addr, bool swa) DPAA2_FAS_BLE | \ DPAA2_FAS_L3CE | \ DPAA2_FAS_L4CE) -/* Tx errors */ -#define DPAA2_FAS_TX_ERR_MASK (DPAA2_FAS_KSE | \ - DPAA2_FAS_EOFHE | \ - DPAA2_FAS_MNLE | \ - DPAA2_FAS_TIDE) /* Time in milliseconds between link state updates */ #define DPAA2_ETH_LINK_STATE_REFRESH 1000 -- 2.7.4