From 4ce97c6f6b4fc17383266f33f2f74b5f5ea0f8f0 Mon Sep 17 00:00:00 2001 From: Yuanhan Liu Date: Sun, 9 Oct 2016 15:28:00 +0800 Subject: [PATCH] net/vhost: add an option to enable dequeue zero copy Add an option, dequeue-zero-copy, to enable this feature in vhost-pmd. Signed-off-by: Yuanhan Liu Reviewed-by: Maxime Coquelin Tested-by: Qian Xu --- drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index c1d09a0230..86c7a4d41b 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -51,6 +51,7 @@ #define ETH_VHOST_IFACE_ARG "iface" #define ETH_VHOST_QUEUES_ARG "queues" #define ETH_VHOST_CLIENT_ARG "client" +#define ETH_VHOST_DEQUEUE_ZERO_COPY "dequeue-zero-copy" static const char *drivername = "VHOST PMD"; @@ -58,6 +59,7 @@ static const char *valid_arguments[] = { ETH_VHOST_IFACE_ARG, ETH_VHOST_QUEUES_ARG, ETH_VHOST_CLIENT_ARG, + ETH_VHOST_DEQUEUE_ZERO_COPY, NULL }; @@ -1132,6 +1134,7 @@ rte_pmd_vhost_probe(const char *name, const char *params) uint16_t queues; uint64_t flags = 0; int client_mode = 0; + int dequeue_zero_copy = 0; RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name); @@ -1168,6 +1171,16 @@ rte_pmd_vhost_probe(const char *name, const char *params) flags |= RTE_VHOST_USER_CLIENT; } + if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) { + ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY, + &open_int, &dequeue_zero_copy); + if (ret < 0) + goto out_free; + + if (dequeue_zero_copy) + flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY; + } + eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags); out_free: -- 2.20.1