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[72.74.133.40]) by smtp.gmail.com with ESMTPSA id s4sm2132497qtn.34.2020.08.27.09.11.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Aug 2020 09:11:41 -0700 (PDT) From: Ed Czeck To: dev@dpdk.org, ferruh.yigit@intel.com, bruce.richardson@intel.com Cc: shepard.siegel@atomicrules.com, john.miller@atomicrules.com, Ed Czeck Date: Thu, 27 Aug 2020 12:11:30 -0400 Message-Id: <20200827161130.14978-2-ed.czeck@atomicrules.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200827161130.14978-1-ed.czeck@atomicrules.com> References: <20200819153539.32698-1-ed.czeck@atomicrules.com> <20200827161130.14978-1-ed.czeck@atomicrules.com> Subject: [dpdk-dev] [PATCH 2/2] net/ark: remove RTE_LIBRTE_ARK_PAD_TX configuration macro X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Replace behavior with RTE_LIBRTE_ARK_MIN_TX_PKTLEN with a default value of 0. Update documentation as needed. Signed-off-by: Ed Czeck --- doc/guides/nics/ark.rst | 16 ++++++++---- drivers/net/ark/ark_ethdev_tx.c | 43 ++++++++++++++++++--------------- drivers/net/ark/ark_logs.h | 8 ------ 3 files changed, 35 insertions(+), 32 deletions(-) diff --git a/doc/guides/nics/ark.rst b/doc/guides/nics/ark.rst index c3ffcbbc2..c7ed4095f 100644 --- a/doc/guides/nics/ark.rst +++ b/doc/guides/nics/ark.rst @@ -126,11 +126,10 @@ Configuration Information The following configuration options are available for the ARK PMD: - * **CONFIG_RTE_LIBRTE_ARK_PMD** (default y): Enables or disables inclusion - of the ARK PMD driver in the DPDK compilation. - - * **CONFIG_RTE_LIBRTE_ARK_PAD_TX** (default y): When enabled TX - packets are padded to 60 bytes to support downstream MACS. + * **RTE_LIBRTE_ARK_MIN_TX_PKTLEN** (default 0): Sets the minimum + packet length for tx packets to the FPGA. Packets less than this + length are padded to meet the requirement. This allows padding to + be offloaded or remain in host software. Building DPDK @@ -144,6 +143,13 @@ By default the ARK PMD library will be built into the DPDK library. For configuring and using UIO and VFIO frameworks, please also refer :ref:`the documentation that comes with DPDK suite `. +To build with a non-zero minimum tx packet length, set the above macro in your +CFLAGS environment prior to the meson build step. I.e., + + export CFLAGS="-DRTE_LIBRTE_ARK_MIN_TX_PKTLEN=60" + meson build + + Supported ARK RTL PCIe Instances -------------------------------- diff --git a/drivers/net/ark/ark_ethdev_tx.c b/drivers/net/ark/ark_ethdev_tx.c index 72624deb3..52ce2ed41 100644 --- a/drivers/net/ark/ark_ethdev_tx.c +++ b/drivers/net/ark/ark_ethdev_tx.c @@ -14,6 +14,11 @@ #define ARK_TX_META_OFFSET (RTE_PKTMBUF_HEADROOM - ARK_TX_META_SIZE) #define ARK_TX_MAX_NOCHAIN (RTE_MBUF_DEFAULT_DATAROOM) +#ifndef RTE_LIBRTE_ARK_MIN_TX_PKTLEN +#define ARK_MIN_TX_PKTLEN 0 +#else +#define ARK_MIN_TX_PKTLEN RTE_LIBRTE_ARK_MIN_TX_PKTLEN +#endif /* ************************************************************************* */ struct ark_tx_queue { @@ -104,28 +109,28 @@ eth_ark_xmit_pkts(void *vtxq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) ++nb) { mbuf = tx_pkts[nb]; - if (ARK_TX_PAD_TO_60) { - if (unlikely(rte_pktmbuf_pkt_len(mbuf) < 60)) { - /* this packet even if it is small can be split, - * be sure to add to the end mbuf +#if ARK_MIN_TX_PKTLEN != 0 + if (unlikely(rte_pktmbuf_pkt_len(mbuf) < ARK_MIN_TX_PKTLEN)) { + /* this packet even if it is small can be split, + * be sure to add to the end mbuf + */ + uint16_t to_add = ARK_MIN_TX_PKTLEN - + rte_pktmbuf_pkt_len(mbuf); + char *appended = + rte_pktmbuf_append(mbuf, to_add); + + if (appended == 0) { + /* This packet is in error, + * we cannot send it so just + * count it and delete it. */ - uint16_t to_add = - 60 - rte_pktmbuf_pkt_len(mbuf); - char *appended = - rte_pktmbuf_append(mbuf, to_add); - - if (appended == 0) { - /* This packet is in error, - * we cannot send it so just - * count it and delete it. - */ - queue->tx_errors += 1; - rte_pktmbuf_free(mbuf); - continue; - } - memset(appended, 0, to_add); + queue->tx_errors += 1; + rte_pktmbuf_free(mbuf); + continue; } + memset(appended, 0, to_add); } +#endif if (unlikely(mbuf->nb_segs != 1)) { stat = eth_ark_tx_jumbo(queue, mbuf); diff --git a/drivers/net/ark/ark_logs.h b/drivers/net/ark/ark_logs.h index c3d7e7d39..ca46d86c9 100644 --- a/drivers/net/ark/ark_logs.h +++ b/drivers/net/ark/ark_logs.h @@ -8,14 +8,6 @@ #include #include - -/* Configuration option to pad TX packets to 60 bytes */ -#ifdef RTE_LIBRTE_ARK_PAD_TX -#define ARK_TX_PAD_TO_60 1 -#else -#define ARK_TX_PAD_TO_60 0 -#endif - /* system camel case definition changed to upper case */ #define PRIU32 PRIu32 #define PRIU64 PRIu64