diff options
Diffstat (limited to 'lib/librte_vhost/vhost-net.h')
| -rw-r--r-- | lib/librte_vhost/vhost-net.h | 200 |
1 files changed, 168 insertions, 32 deletions
diff --git a/lib/librte_vhost/vhost-net.h b/lib/librte_vhost/vhost-net.h index f193a1f6..38593a29 100644 --- a/lib/librte_vhost/vhost-net.h +++ b/lib/librte_vhost/vhost-net.h @@ -43,6 +43,128 @@ #include "rte_virtio_net.h" +/* Used to indicate that the device is running on a data core */ +#define VIRTIO_DEV_RUNNING 1 + +/* Backend value set by guest. */ +#define VIRTIO_DEV_STOPPED -1 + +#define BUF_VECTOR_MAX 256 + +/** + * Structure contains buffer address, length and descriptor index + * from vring to do scatter RX. + */ +struct buf_vector { + uint64_t buf_addr; + uint32_t buf_len; + uint32_t desc_idx; +}; + +/** + * Structure contains variables relevant to RX/TX virtqueues. + */ +struct vhost_virtqueue { + struct vring_desc *desc; + struct vring_avail *avail; + struct vring_used *used; + uint32_t size; + + /* Last index used on the available ring */ + volatile uint16_t last_used_idx; +#define VIRTIO_INVALID_EVENTFD (-1) +#define VIRTIO_UNINITIALIZED_EVENTFD (-2) + + /* Backend value to determine if device should started/stopped */ + int backend; + /* Used to notify the guest (trigger interrupt) */ + int callfd; + /* Currently unused as polling mode is enabled */ + int kickfd; + int enabled; + + /* Physical address of used ring, for logging */ + uint64_t log_guest_addr; +} __rte_cache_aligned; + +/* Old kernels have no such macro defined */ +#ifndef VIRTIO_NET_F_GUEST_ANNOUNCE + #define VIRTIO_NET_F_GUEST_ANNOUNCE 21 +#endif + + +/* + * Make an extra wrapper for VIRTIO_NET_F_MQ and + * VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX as they are + * introduced since kernel v3.8. This makes our + * code buildable for older kernel. + */ +#ifdef VIRTIO_NET_F_MQ + #define VHOST_MAX_QUEUE_PAIRS VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX + #define VHOST_SUPPORTS_MQ (1ULL << VIRTIO_NET_F_MQ) +#else + #define VHOST_MAX_QUEUE_PAIRS 1 + #define VHOST_SUPPORTS_MQ 0 +#endif + +/* + * Define virtio 1.0 for older kernels + */ +#ifndef VIRTIO_F_VERSION_1 + #define VIRTIO_F_VERSION_1 32 +#endif + +/** + * Device structure contains all configuration information relating + * to the device. + */ +struct virtio_net { + /* Frontend (QEMU) memory and memory region information */ + struct virtio_memory *mem; + uint64_t features; + uint64_t protocol_features; + int vid; + uint32_t flags; + uint16_t vhost_hlen; + /* to tell if we need broadcast rarp packet */ + rte_atomic16_t broadcast_rarp; + uint32_t virt_qp_nb; + struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2]; +#define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ) + char ifname[IF_NAME_SZ]; + uint64_t log_size; + uint64_t log_base; + uint64_t log_addr; + struct ether_addr mac; + +} __rte_cache_aligned; + +/** + * Information relating to memory regions including offsets to + * addresses in QEMUs memory file. + */ +struct virtio_memory_regions { + uint64_t guest_phys_address; + uint64_t guest_phys_address_end; + uint64_t memory_size; + uint64_t userspace_address; + uint64_t address_offset; +}; + + +/** + * Memory structure includes region and mapping information. + */ +struct virtio_memory { + /* Base QEMU userspace address of the memory file. */ + uint64_t base_address; + uint64_t mapped_address; + uint64_t mapped_size; + uint32_t nregions; + struct virtio_memory_regions regions[0]; +}; + + /* Macros for printing using RTE_LOG */ #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1 @@ -57,9 +179,9 @@ char packet[VHOST_MAX_PRINT_BUFF]; \ \ if ((header)) \ - snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%" PRIu64 ") Header size %d: ", (device->device_fh), (size)); \ + snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \ else \ - snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%" PRIu64 ") Packet size %d: ", (device->device_fh), (size)); \ + snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \ for (index = 0; index < (size); index++) { \ snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \ "%02hhx ", pkt_addr[index]); \ @@ -74,37 +196,51 @@ #define PRINT_PACKET(device, addr, size, header) do {} while (0) #endif - -/* - * Structure used to identify device context. +/** + * Function to convert guest physical addresses to vhost virtual addresses. + * This is used to convert guest virtio buffer addresses. */ -struct vhost_device_ctx { - pid_t pid; /* PID of process calling the IOCTL. */ - uint64_t fh; /* Populated with fi->fh to track the device index. */ -}; - -int vhost_new_device(struct vhost_device_ctx); -void vhost_destroy_device(struct vhost_device_ctx); - -void vhost_set_ifname(struct vhost_device_ctx, - const char *if_name, unsigned int if_len); - -int vhost_get_features(struct vhost_device_ctx, uint64_t *); -int vhost_set_features(struct vhost_device_ctx, uint64_t *); - -int vhost_set_vring_num(struct vhost_device_ctx, struct vhost_vring_state *); -int vhost_set_vring_addr(struct vhost_device_ctx, struct vhost_vring_addr *); -int vhost_set_vring_base(struct vhost_device_ctx, struct vhost_vring_state *); -int vhost_get_vring_base(struct vhost_device_ctx, - uint32_t, struct vhost_vring_state *); - -int vhost_set_vring_kick(struct vhost_device_ctx, struct vhost_vring_file *); -int vhost_set_vring_call(struct vhost_device_ctx, struct vhost_vring_file *); - -int vhost_set_backend(struct vhost_device_ctx, struct vhost_vring_file *); - -int vhost_set_owner(struct vhost_device_ctx); -int vhost_reset_owner(struct vhost_device_ctx); +static inline uint64_t __attribute__((always_inline)) +gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa) +{ + struct virtio_memory_regions *region; + uint32_t regionidx; + uint64_t vhost_va = 0; + + for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) { + region = &dev->mem->regions[regionidx]; + if ((guest_pa >= region->guest_phys_address) && + (guest_pa <= region->guest_phys_address_end)) { + vhost_va = region->address_offset + guest_pa; + break; + } + } + return vhost_va; +} + +struct virtio_net_device_ops const *notify_ops; +struct virtio_net *get_device(int vid); + +int vhost_new_device(void); +void vhost_destroy_device(int); + +void vhost_set_ifname(int, const char *if_name, unsigned int if_len); + +int vhost_get_features(int, uint64_t *); +int vhost_set_features(int, uint64_t *); + +int vhost_set_vring_num(int, struct vhost_vring_state *); +int vhost_set_vring_addr(int, struct vhost_vring_addr *); +int vhost_set_vring_base(int, struct vhost_vring_state *); +int vhost_get_vring_base(int, uint32_t, struct vhost_vring_state *); + +int vhost_set_vring_kick(int, struct vhost_vring_file *); +int vhost_set_vring_call(int, struct vhost_vring_file *); + +int vhost_set_backend(int, struct vhost_vring_file *); + +int vhost_set_owner(int); +int vhost_reset_owner(int); /* * Backend-specific cleanup. Defined by vhost-cuse and vhost-user. |