Re: [PATCH v5 06/11] net/virtio-user: add option to use packed queues
From: Maxime Coquelin <hidden>
Date: 2018-09-12 09:25:11
On 09/06/2018 08:19 PM, Jens Freimann wrote:
From: Yuanhan Liu <redacted> Add option to enable packed queue support for virtio-user devices. Signed-off-by: Yuanhan Liu <redacted> --- drivers/net/virtio/virtio_user/virtio_user_dev.c | 10 ++++++++-- drivers/net/virtio/virtio_user/virtio_user_dev.h | 2 +- drivers/net/virtio/virtio_user_ethdev.c | 14 +++++++++++++- 3 files changed, 22 insertions(+), 4 deletions(-)
Shouldn't this patch be better placed at the end of the series to avoid negotiating packed ring feature while the datapaths aren't implemented?
quoted hunk ↗ jump to hunk
diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c index 7df600b02..9979bea0d 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c@@ -372,12 +372,13 @@ virtio_user_dev_setup(struct virtio_user_dev *dev) 1ULL << VIRTIO_NET_F_GUEST_TSO4 | \ 1ULL << VIRTIO_NET_F_GUEST_TSO6 | \ 1ULL << VIRTIO_F_IN_ORDER | \ - 1ULL << VIRTIO_F_VERSION_1) + 1ULL << VIRTIO_F_VERSION_1 | \ + 1ULL << VIRTIO_F_RING_PACKED) int virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, int cq, int queue_size, const char *mac, char **ifname, - int mrg_rxbuf, int in_order) + int mrg_rxbuf, int in_order, int packed_vq) { pthread_mutex_init(&dev->mutex, NULL); snprintf(dev->path, PATH_MAX, "%s", path);@@ -432,6 +433,11 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, dev->unsupported_features |= (1ull << VIRTIO_F_IN_ORDER); } + if (packed_vq) + dev->device_features |= (1ull << VIRTIO_F_RING_PACKED); + else + dev->device_features &= ~(1ull << VIRTIO_F_RING_PACKED); + if (dev->mac_specified) { dev->device_features |= (1ull << VIRTIO_NET_F_MAC); } else {diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h b/drivers/net/virtio/virtio_user/virtio_user_dev.h index d6e0e137b..7f46ba1d9 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h@@ -49,7 +49,7 @@ int virtio_user_start_device(struct virtio_user_dev *dev); int virtio_user_stop_device(struct virtio_user_dev *dev); int virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, int cq, int queue_size, const char *mac, char **ifname, - int mrg_rxbuf, int in_order); + int mrg_rxbuf, int in_order, int packed_vq); void virtio_user_dev_uninit(struct virtio_user_dev *dev); void virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t queue_idx); uint8_t virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs);diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c index 525d16cab..72ac86186 100644 --- a/drivers/net/virtio/virtio_user_ethdev.c +++ b/drivers/net/virtio/virtio_user_ethdev.c@@ -364,6 +364,8 @@ static const char *valid_args[] = { VIRTIO_USER_ARG_MRG_RXBUF, #define VIRTIO_USER_ARG_IN_ORDER "in_order" VIRTIO_USER_ARG_IN_ORDER, +#define VIRTIO_USER_ARG_PACKED_VQ "packed_vq" + VIRTIO_USER_ARG_PACKED_VQ, NULL };@@ -473,6 +475,7 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev) char *ifname = NULL; char *mac_addr = NULL; int ret = -1; + uint64_t packed_vq = 0; kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args); if (!kvlist) {@@ -556,6 +559,15 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev) cq = 1; } + if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) { + if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ, + &get_integer_arg, &packed_vq) < 0) { + PMD_INIT_LOG(ERR, "error to parse %s", + VIRTIO_USER_ARG_PACKED_VQ); + goto end; + } + } + if (queues > 1 && cq == 0) { PMD_INIT_LOG(ERR, "multi-q requires ctrl-q"); goto end;@@ -603,7 +615,7 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev) vu_dev->is_server = false; if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq, queue_size, mac_addr, &ifname, mrg_rxbuf, - in_order) < 0) { + in_order, packed_vq) < 0) { PMD_INIT_LOG(ERR, "virtio_user_dev_init fails"); virtio_user_eth_dev_free(eth_dev); goto end;