From 1357b4b36246da9dd36d21754234dc306d51f7b4 Mon Sep 17 00:00:00 2001 From: Ivan Dyukov Date: Mon, 30 Mar 2020 10:58:02 +0300 Subject: [PATCH] net/virtio: support Virtio link speed feature This patch adds a support of VIRTIO_NET_F_SPEED_DUPLEX feature for virtio driver. There are two ways to specify speed of the link: 'speed' devarg negotiate speed from qemu via VIRTIO_NET_F_SPEED_DUPLEX The highest priority is devarg. If devarg is not specified, drivers tries to negotiate it from qemu. Signed-off-by: Ivan Dyukov Reviewed-by: Maxime Coquelin --- drivers/net/virtio/virtio_ethdev.c | 26 +++++++++++++++++++++++--- drivers/net/virtio/virtio_ethdev.h | 3 ++- drivers/net/virtio/virtio_pci.h | 16 ++++++++++++++++ 3 files changed, 41 insertions(+), 4 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index 5058990d12..37766cbb64 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -1662,7 +1662,8 @@ virtio_configure_intr(struct rte_eth_dev *dev) return 0; } - +#define SPEED_UNKNOWN 0xffffffff +#define DUPLEX_UNKNOWN 0xff /* reset device and renegotiate features if needed */ static int virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) @@ -1718,6 +1719,25 @@ virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2], hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]); + if (hw->speed == SPEED_UNKNOWN) { + if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) { + config = &local_config; + vtpci_read_dev_config(hw, + offsetof(struct virtio_net_config, speed), + &config->speed, sizeof(config->speed)); + vtpci_read_dev_config(hw, + offsetof(struct virtio_net_config, duplex), + &config->duplex, sizeof(config->duplex)); + hw->speed = config->speed; + hw->duplex = config->duplex; + } + } + if (hw->speed == SPEED_UNKNOWN) + hw->speed = ETH_SPEED_NUM_10G; + if (hw->duplex == DUPLEX_UNKNOWN) + hw->duplex = ETH_LINK_FULL_DUPLEX; + PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d", + hw->speed, hw->duplex); if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) { config = &local_config; @@ -1865,7 +1885,7 @@ int eth_virtio_dev_init(struct rte_eth_dev *eth_dev) { struct virtio_hw *hw = eth_dev->data->dev_private; - uint32_t speed = ETH_SPEED_NUM_10G; + uint32_t speed = SPEED_UNKNOWN; int ret; if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) { @@ -2450,7 +2470,7 @@ virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complet struct virtio_hw *hw = dev->data->dev_private; memset(&link, 0, sizeof(link)); - link.link_duplex = ETH_LINK_FULL_DUPLEX; + link.link_duplex = hw->duplex; link.link_speed = hw->speed; link.link_autoneg = ETH_LINK_AUTONEG; diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h index cd8947656e..febaf17a81 100644 --- a/drivers/net/virtio/virtio_ethdev.h +++ b/drivers/net/virtio/virtio_ethdev.h @@ -37,7 +37,8 @@ 1ULL << VIRTIO_F_RING_PACKED | \ 1ULL << VIRTIO_F_IOMMU_PLATFORM | \ 1ULL << VIRTIO_F_ORDER_PLATFORM | \ - 1ULL << VIRTIO_F_NOTIFICATION_DATA) + 1ULL << VIRTIO_F_NOTIFICATION_DATA | \ + 1ULL << VIRTIO_NET_F_SPEED_DUPLEX) #define VIRTIO_PMD_SUPPORTED_GUEST_FEATURES \ (VIRTIO_PMD_DEFAULT_GUEST_FEATURES | \ diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h index 9cb7104961..2ac665bea1 100644 --- a/drivers/net/virtio/virtio_pci.h +++ b/drivers/net/virtio/virtio_pci.h @@ -141,6 +141,9 @@ struct virtnet_ctl; */ #define VIRTIO_F_NOTIFICATION_DATA 38 +/* Device set linkspeed and duplex */ +#define VIRTIO_NET_F_SPEED_DUPLEX 63 + /* The Guest publishes the used index for which it expects an interrupt * at the end of the avail ring. Host should ignore the avail->flags field. */ /* The Host publishes the avail index for which it expects a kick @@ -260,6 +263,7 @@ struct virtio_hw { uint8_t mac_addr[RTE_ETHER_ADDR_LEN]; uint32_t notify_off_multiplier; uint32_t speed; /* link speed in MB */ + uint8_t duplex; uint8_t *isr; uint16_t *notify_base; struct virtio_pci_common_cfg *common_cfg; @@ -306,6 +310,18 @@ struct virtio_net_config { uint16_t status; uint16_t max_virtqueue_pairs; uint16_t mtu; + /* + * speed, in units of 1Mb. All values 0 to INT_MAX are legal. + * Any other value stands for unknown. + */ + uint32_t speed; + /* + * 0x00 - half duplex + * 0x01 - full duplex + * Any other value stands for unknown. + */ + uint8_t duplex; + } __rte_packed; /* -- 2.20.1