From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D147CD98E2 for ; Wed, 17 Jun 2026 08:16:56 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A103440EE2; Wed, 17 Jun 2026 10:15:31 +0200 (CEST) Received: from smtpbguseast2.qq.com (smtpbguseast2.qq.com [54.204.34.130]) by mails.dpdk.org (Postfix) with ESMTP id E035C40E2C; Wed, 17 Jun 2026 10:15:27 +0200 (CEST) X-QQ-mid: zesmtpgz4t1781684124t8029babb X-QQ-Originating-IP: WYRSIjN/hE6A3GDJztroLuhx6W/zIK77JVPG0zJtvuI= Received: from DSK-zaiyuwang.trustnetic.com ( [183.157.22.210]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 17 Jun 2026 16:15:22 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 11873334079782392255 EX-QQ-RecipientCnt: 4 From: Zaiyu Wang To: dev@dpdk.org Cc: Zaiyu Wang , stable@dpdk.org, Jiawen Wu Subject: [PATCH v8 19/21] net/txgbe: fix to reset Tx write-back pointer Date: Wed, 17 Jun 2026 16:13:06 +0800 Message-Id: <20260617081309.19124-20-zaiyuwang@trustnetic.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20260617081309.19124-1-zaiyuwang@trustnetic.com> References: <20260423034024.14404-1-zaiyuwang@trustnetic.com> <20260617081309.19124-1-zaiyuwang@trustnetic.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:trustnetic.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: MKvWxcusrT3QAppMdenq8Xpm78Kx2ChjhS7qmAto3C12njdMCo/qzwi+ FHaMLB5qLm8eiIrjWuXYNyuJqhLzoqptB9HGD0qf8zp8ChcbqWhuDzU1XxkFlHoqwK8NX5E YRjPUexYiHsLFKfK3St5AMiJ+Lg4ScKIvAxaRFGKHBfm6avCBm+/55y5KsV9hZxIQkMBpj/ /savpFoQ7gTRSVymC0GQfhvarfm+V2ir4M+XnF4rBO702+EbpboeGTrTIeQkRd6Xflpe71m zldPRk0Tk6EK5FgX64+rlZJjw2eQaXyMy6GR8eG9FPXF7JuncKX0lYsIZo/8dMIEK9UPGbT wCy7rWU2l2Vv4KCXxEn58qDgL+Oalog+6Ma98VJgcrhnyZYwVLXwOojQquirgmP51i4Y0XF 2vntD04E3ejlOxo/GjxoNK/pUeYygcqJRD/XXMyZ6ejKeOA4NT+n5/uJOplg0qDyPTzewxZ jATgqSF/wifjGCI4wYSG1DVVp0lpS6bnPY5HDkncrELN+5Zrzu8Hzz9u+aUhe57XC1zKJxs 1D3BfuS+iSEnxtR+N8D09OQm30hexer0MCZihixF2RhNXlxRIYylTwXQmYhgwEjJND9mSiN NyL7aI08sOHvIynSlTeiM04FFMy++UZRbQ3v+Fi3j0XzoMBdi7IwomAfsfhYdB7W9EtybyF j0BfmddKFQfWm/oDKkkD+RPSmRHe1uu82mpckI31ZIkyskPsYe9ZybtdRqupfjsR2mZPrr0 VEK5B2GfmUUaq1vaClNwQLPFDMhhrHVFzkbWVnLWt57wtoCC1NKvFXVcerz66LKm4xLiCob qER8+W3lFgTnhQPiV1lpweV/ZhDopKlSI9yj3A8xl7UnKBa45cLlFkdfXJukVowJnwU8sOP 2Hh+lx/CDGmwmFe663/T1j+0/zC+749zaPoQiHGKVykpyNufqAVA1tAMlywIy9p6s7NSvTn 3+u6C4RANUuxh7uZsI1jV85NIuVo3NLcXhsarIxIh/SOs0+2Rn2qBpnRlLLEPtd7GSWZUqh vbJt8wo5ayPpWxGx4q10pDlBhWGeyfX3lc9H41Txy8diU2rqPjStGazIG4xOfX3Kx+DQnng 5VJFSnfz7Z/UmXlNf0QVc7e4lzIGxkv2sEZzd2IQ4bQTBB/8hiePpW+vVSH2q6OP0vCp3/H uL4E X-QQ-XMRINFO: OWPUhxQsoeAVwkVaQIEGSKwwgKCxK/fD5g== X-QQ-RECHKSPAM: 0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The write-back pointer was not reset when the Tx queue was reset. This leads to the wrong Tx desc free logic. Move the resetting of pointer into txq->ops->reset(txq). Fixes: 8ada71d0bb7f ("net/txgbe: add Tx head write-back mode for Amber-Lite") Cc: stable@dpdk.org Signed-off-by: Zaiyu Wang --- drivers/net/txgbe/txgbe_rxtx.c | 45 +++++++++++++---------- drivers/net/txgbe/txgbe_rxtx.h | 1 + drivers/net/txgbe/txgbe_rxtx_vec_common.h | 7 ++++ 3 files changed, 33 insertions(+), 20 deletions(-) diff --git a/drivers/net/txgbe/txgbe_rxtx.c b/drivers/net/txgbe/txgbe_rxtx.c index 3525b708f8..0a9fc3ddfd 100644 --- a/drivers/net/txgbe/txgbe_rxtx.c +++ b/drivers/net/txgbe/txgbe_rxtx.c @@ -2313,6 +2313,12 @@ txgbe_reset_tx_queue(struct txgbe_tx_queue *txq) txq->tx_next_dd = (uint16_t)(txq->tx_free_thresh - 1); txq->tx_tail = 0; + /* Zero out headwb_mem memory */ + if (txq->headwb_mem) { + for (i = 0; i < txq->headwb_size; i++) + txq->headwb_mem[i] = 0; + } + /* * Always allow 1 descriptor to be un-allocated to avoid * a H/W race condition @@ -2412,7 +2418,7 @@ txgbe_get_tx_port_offloads(struct rte_eth_dev *dev) return tx_offload_capa; } -static int +static void txgbe_setup_headwb_resources(struct rte_eth_dev *dev, void *tx_queue, unsigned int socket_id) @@ -2420,33 +2426,33 @@ txgbe_setup_headwb_resources(struct rte_eth_dev *dev, struct txgbe_hw *hw = TXGBE_DEV_HW(dev); const struct rte_memzone *headwb; struct txgbe_tx_queue *txq = tx_queue; - u8 i, headwb_size = 0; + u8 headwb_size = 0; - if (hw->mac.type != txgbe_mac_aml && hw->mac.type != txgbe_mac_aml40) { - txq->headwb_mem = NULL; - return 0; - } + if (hw->mac.type != txgbe_mac_aml && hw->mac.type != txgbe_mac_aml40) + goto out; + + if (!hw->devarg.tx_headwb) + goto out; - headwb_size = hw->devarg.tx_headwb_size; + headwb_size = txq->headwb_size; headwb = rte_eth_dma_zone_reserve(dev, "tx_headwb_mem", txq->queue_id, sizeof(u32) * headwb_size, TXGBE_ALIGN, socket_id); if (headwb == NULL) { - DEBUGOUT("Fail to setup headwb resources: no mem"); - txgbe_tx_queue_release(txq); - return -ENOMEM; + PMD_DRV_LOG(INFO, + "Failed to allocate headwb memory for Tx queue %u, change to SP mode", + txq->queue_id); + goto out; } txq->headwb = headwb; txq->headwb_dma = TMZ_PADDR(headwb); txq->headwb_mem = (uint32_t *)TMZ_VADDR(headwb); + return; - /* Zero out headwb_mem memory */ - for (i = 0; i < headwb_size; i++) - txq->headwb_mem[i] = 0; - - return 0; +out: + txq->headwb_mem = NULL; } int __rte_cold @@ -2542,6 +2548,7 @@ txgbe_dev_tx_queue_setup(struct rte_eth_dev *dev, txq->offloads = offloads; txq->ops = &def_txq_ops; txq->tx_deferred_start = tx_conf->tx_deferred_start; + txq->headwb_size = hw->devarg.tx_headwb_size; #ifdef RTE_LIB_SECURITY txq->using_ipsec = !!(dev->data->dev_conf.txmode.offloads & RTE_ETH_TX_OFFLOAD_SECURITY); @@ -2577,8 +2584,7 @@ txgbe_dev_tx_queue_setup(struct rte_eth_dev *dev, /* set up scalar TX function as appropriate */ txgbe_set_tx_function(dev, txq); - if (hw->devarg.tx_headwb) - err = txgbe_setup_headwb_resources(dev, txq, socket_id); + txgbe_setup_headwb_resources(dev, txq, socket_id); txq->ops->reset(txq); txq->desc_error = 0; @@ -4755,15 +4761,14 @@ txgbe_dev_tx_init(struct rte_eth_dev *dev) wr32(hw, TXGBE_TXRP(txq->reg_idx), 0); wr32(hw, TXGBE_TXWP(txq->reg_idx), 0); - if ((hw->mac.type == txgbe_mac_aml || hw->mac.type == txgbe_mac_aml40) && - hw->devarg.tx_headwb) { + if (txq->headwb_mem) { uint32_t txdctl; wr32(hw, TXGBE_PX_TR_HEAD_ADDRL(txq->reg_idx), (uint32_t)(txq->headwb_dma & BIT_MASK32)); wr32(hw, TXGBE_PX_TR_HEAD_ADDRH(txq->reg_idx), (uint32_t)(txq->headwb_dma >> 32)); - if (hw->devarg.tx_headwb_size == 16) + if (txq->headwb_size == 16) txdctl = TXGBE_PX_TR_CFG_HEAD_WB | TXGBE_PX_TR_CFG_HEAD_WB_64BYTE; else diff --git a/drivers/net/txgbe/txgbe_rxtx.h b/drivers/net/txgbe/txgbe_rxtx.h index 43c818cfbf..5d2e33a8d4 100644 --- a/drivers/net/txgbe/txgbe_rxtx.h +++ b/drivers/net/txgbe/txgbe_rxtx.h @@ -416,6 +416,7 @@ struct txgbe_tx_queue { uint64_t desc_error; bool resetting; const struct rte_memzone *headwb; + uint16_t headwb_size; uint64_t headwb_dma; volatile uint32_t *headwb_mem; }; diff --git a/drivers/net/txgbe/txgbe_rxtx_vec_common.h b/drivers/net/txgbe/txgbe_rxtx_vec_common.h index 77d7ff785b..6e561aff30 100644 --- a/drivers/net/txgbe/txgbe_rxtx_vec_common.h +++ b/drivers/net/txgbe/txgbe_rxtx_vec_common.h @@ -252,6 +252,13 @@ _txgbe_reset_tx_queue_vec(struct txgbe_tx_queue *txq) txq->tx_next_dd = (uint16_t)(txq->tx_free_thresh - 1); txq->tx_tail = 0; + + /* Zero out headwb_mem memory */ + if (txq->headwb_mem) { + for (i = 0; i < txq->headwb_size; i++) + txq->headwb_mem[i] = 0; + } + /* * Always allow 1 descriptor to be un-allocated to avoid * a H/W race condition -- 2.21.0.windows.1