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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23c845b7467sm138525475ad.230.2025.07.09.10.36.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Jul 2025 10:36:17 -0700 (PDT) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger , Bruce Richardson Subject: [RFC v2 03/12] net/ring: allow lockfree transmit if ring supports it Date: Wed, 9 Jul 2025 10:33:29 -0700 Message-ID: <20250709173611.6390-4-stephen@networkplumber.org> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250709173611.6390-1-stephen@networkplumber.org> References: <0250411234927.114568-1-stephen@networkplumber.org> <20250709173611.6390-1-stephen@networkplumber.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Need to be able have multiple threads all using same transmit queue when using SPAN. Signed-off-by: Stephen Hemminger --- drivers/net/ring/rte_eth_ring.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c index b1085bf390..966c64d9a5 100644 --- a/drivers/net/ring/rte_eth_ring.c +++ b/drivers/net/ring/rte_eth_ring.c @@ -177,6 +177,19 @@ eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id, return 0; } +static bool +eth_tx_queue_lockfree(const struct pmd_internals *internals) +{ + unsigned int i; + + for (i = 0; i < internals->max_tx_queues; i++) { + const struct ring_queue *r = &internals->tx_ring_queues[i]; + + if (r->rng->flags & RING_F_SP_ENQ) + return false; + } + return true; +} static int eth_dev_info(struct rte_eth_dev *dev, @@ -189,6 +202,10 @@ eth_dev_info(struct rte_eth_dev *dev, dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues; dev_info->rx_offload_capa = RTE_ETH_RX_OFFLOAD_SCATTER; dev_info->tx_offload_capa = RTE_ETH_TX_OFFLOAD_MULTI_SEGS; + + if (eth_tx_queue_lockfree(internals)) + dev_info->tx_offload_capa |= RTE_ETH_TX_OFFLOAD_MT_LOCKFREE; + dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues; dev_info->min_rx_bufsize = 0; -- 2.47.2