From 142678d429598f5e1c484d84c986f33aaf2263dc Mon Sep 17 00:00:00 2001 From: Jianfeng Tan Date: Fri, 13 Jan 2017 12:18:34 +0000 Subject: [PATCH] net/virtio-user: fix wrongly get/set features Before the commit 86d59b21468a ("net/virtio: support LRO"), features in virtio PMD, is decided and properly set at device initialization and will not be changed. But afterward, features could be changed in virtio_dev_configure(), and will be re-negotiated if it's changed. In virtio-user, device features is obtained at driver probe phase only once, but we did not store it. So the added feature bits in re-negotiation will fail. To fix it, we store it down, and will be used to feature negotiation either at device initialization phase or device configure phase. Fixes: e9efa4d93821 ("net/virtio-user: add new virtual PCI driver") Cc: stable@dpdk.org Signed-off-by: Jianfeng Tan Acked-by: Yuanhan Liu --- drivers/net/virtio/virtio_ethdev.h | 5 +++ .../net/virtio/virtio_user/virtio_user_dev.c | 34 +++++++++---------- .../net/virtio/virtio_user/virtio_user_dev.h | 5 ++- drivers/net/virtio/virtio_user_ethdev.c | 5 +-- 4 files changed, 28 insertions(+), 21 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h index 27d9a190ad..4feccf939b 100644 --- a/drivers/net/virtio/virtio_ethdev.h +++ b/drivers/net/virtio/virtio_ethdev.h @@ -70,6 +70,11 @@ 1ULL << VIRTIO_F_VERSION_1 | \ 1ULL << VIRTIO_F_IOMMU_PLATFORM) +#define VIRTIO_PMD_SUPPORTED_GUEST_FEATURES \ + (VIRTIO_PMD_DEFAULT_GUEST_FEATURES | \ + 1u << VIRTIO_NET_F_GUEST_CSUM | \ + 1u << VIRTIO_NET_F_GUEST_TSO4 | \ + 1u << VIRTIO_NET_F_GUEST_TSO6) /* * CQ function prototype */ diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c index e239e0ebab..0d7e17b296 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c @@ -148,12 +148,13 @@ virtio_user_start_device(struct virtio_user_dev *dev) /* Step 1: set features * Make sure VHOST_USER_F_PROTOCOL_FEATURES is added if mq is enabled, - * and VIRTIO_NET_F_MAC is stripped. + * VIRTIO_NET_F_MAC and VIRTIO_NET_F_CTRL_VQ is stripped. */ features = dev->features; if (dev->max_queue_pairs > 1) features |= VHOST_USER_MQ; features &= ~(1ull << VIRTIO_NET_F_MAC); + features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ); ret = vhost_user_sock(dev->vhostfd, VHOST_USER_SET_FEATURES, &features); if (ret < 0) goto error; @@ -228,29 +229,26 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues, } if (vhost_user_sock(dev->vhostfd, VHOST_USER_GET_FEATURES, - &dev->features) < 0) { + &dev->device_features) < 0) { PMD_INIT_LOG(ERR, "get_features failed: %s", strerror(errno)); return -1; } if (dev->mac_specified) - dev->features |= (1ull << VIRTIO_NET_F_MAC); + dev->device_features |= (1ull << VIRTIO_NET_F_MAC); - if (!cq) { - dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ); - /* Also disable features depends on VIRTIO_NET_F_CTRL_VQ */ - dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_RX); - dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN); - dev->features &= ~(1ull << VIRTIO_NET_F_GUEST_ANNOUNCE); - dev->features &= ~(1ull << VIRTIO_NET_F_MQ); - dev->features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR); - } else { - /* vhost user backend does not need to know ctrl-q, so - * actually we need add this bit into features. However, - * DPDK vhost-user does send features with this bit, so we - * check it instead of OR it for now. + if (cq) { + /* device does not really need to know anything about CQ, + * so if necessary, we just claim to support CQ */ - if (!(dev->features & (1ull << VIRTIO_NET_F_CTRL_VQ))) - PMD_INIT_LOG(INFO, "vhost does not support ctrl-q"); + dev->device_features |= (1ull << VIRTIO_NET_F_CTRL_VQ); + } else { + dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ); + /* Also disable features depends on VIRTIO_NET_F_CTRL_VQ */ + dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_RX); + dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN); + dev->device_features &= ~(1ull << VIRTIO_NET_F_GUEST_ANNOUNCE); + dev->device_features &= ~(1ull << VIRTIO_NET_F_MQ); + dev->device_features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR); } if (dev->max_queue_pairs > 1) { diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.h b/drivers/net/virtio/virtio_user/virtio_user_dev.h index 33690b5c5f..28fc788ec6 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.h +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.h @@ -46,7 +46,10 @@ struct virtio_user_dev { uint32_t max_queue_pairs; uint32_t queue_pairs; uint32_t queue_size; - uint64_t features; + uint64_t features; /* the negotiated features with driver, + * and will be sync with device + */ + uint64_t device_features; /* supported features by device */ uint8_t status; uint8_t mac_addr[ETHER_ADDR_LEN]; char path[PATH_MAX]; diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c index 48a8c4fa25..fbf9df75f9 100644 --- a/drivers/net/virtio/virtio_user_ethdev.c +++ b/drivers/net/virtio/virtio_user_ethdev.c @@ -117,7 +117,8 @@ virtio_user_get_features(struct virtio_hw *hw) { struct virtio_user_dev *dev = virtio_user_get_dev(hw); - return dev->features; + /* unmask feature bits defined in vhost user protocol */ + return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES; } static void @@ -125,7 +126,7 @@ virtio_user_set_features(struct virtio_hw *hw, uint64_t features) { struct virtio_user_dev *dev = virtio_user_get_dev(hw); - dev->features = features; + dev->features = features & dev->device_features; } static uint8_t -- 2.20.1