b2229bd24f
Add vhost_user.c and vhost_user.h that define the functions needed to implement vhost-user backend. Signed-off-by: Laurent Vivier <lvivier@redhat.com>
139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* some parts from subprojects/libvhost-user/libvhost-user.h */
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#ifndef VHOST_USER_H
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#define VHOST_USER_H
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#include "virtio.h"
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#include "iov.h"
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#define VHOST_USER_F_PROTOCOL_FEATURES 30
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#define VHOST_MEMORY_BASELINE_NREGIONS 8
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enum vhost_user_protocol_feature {
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VHOST_USER_PROTOCOL_F_MQ = 0,
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VHOST_USER_PROTOCOL_F_LOG_SHMFD = 1,
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VHOST_USER_PROTOCOL_F_RARP = 2,
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VHOST_USER_PROTOCOL_F_REPLY_ACK = 3,
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VHOST_USER_PROTOCOL_F_NET_MTU = 4,
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VHOST_USER_PROTOCOL_F_BACKEND_REQ = 5,
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VHOST_USER_PROTOCOL_F_CROSS_ENDIAN = 6,
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VHOST_USER_PROTOCOL_F_CRYPTO_SESSION = 7,
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VHOST_USER_PROTOCOL_F_PAGEFAULT = 8,
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VHOST_USER_PROTOCOL_F_CONFIG = 9,
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VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD = 10,
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VHOST_USER_PROTOCOL_F_HOST_NOTIFIER = 11,
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VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12,
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VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS = 14,
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VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS = 15,
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VHOST_USER_PROTOCOL_F_MAX
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};
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enum vhost_user_request {
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VHOST_USER_NONE = 0,
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VHOST_USER_GET_FEATURES = 1,
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VHOST_USER_SET_FEATURES = 2,
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VHOST_USER_SET_OWNER = 3,
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VHOST_USER_RESET_OWNER = 4,
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VHOST_USER_SET_MEM_TABLE = 5,
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VHOST_USER_SET_LOG_BASE = 6,
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VHOST_USER_SET_LOG_FD = 7,
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VHOST_USER_SET_VRING_NUM = 8,
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VHOST_USER_SET_VRING_ADDR = 9,
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VHOST_USER_SET_VRING_BASE = 10,
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VHOST_USER_GET_VRING_BASE = 11,
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VHOST_USER_SET_VRING_KICK = 12,
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VHOST_USER_SET_VRING_CALL = 13,
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VHOST_USER_SET_VRING_ERR = 14,
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VHOST_USER_GET_PROTOCOL_FEATURES = 15,
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VHOST_USER_SET_PROTOCOL_FEATURES = 16,
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VHOST_USER_GET_QUEUE_NUM = 17,
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VHOST_USER_SET_VRING_ENABLE = 18,
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VHOST_USER_SEND_RARP = 19,
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VHOST_USER_NET_SET_MTU = 20,
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VHOST_USER_SET_BACKEND_REQ_FD = 21,
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VHOST_USER_IOTLB_MSG = 22,
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VHOST_USER_SET_VRING_ENDIAN = 23,
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VHOST_USER_GET_CONFIG = 24,
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VHOST_USER_SET_CONFIG = 25,
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VHOST_USER_CREATE_CRYPTO_SESSION = 26,
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VHOST_USER_CLOSE_CRYPTO_SESSION = 27,
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VHOST_USER_POSTCOPY_ADVISE = 28,
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VHOST_USER_POSTCOPY_LISTEN = 29,
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VHOST_USER_POSTCOPY_END = 30,
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VHOST_USER_GET_INFLIGHT_FD = 31,
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VHOST_USER_SET_INFLIGHT_FD = 32,
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VHOST_USER_GPU_SET_SOCKET = 33,
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VHOST_USER_VRING_KICK = 35,
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VHOST_USER_GET_MAX_MEM_SLOTS = 36,
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VHOST_USER_ADD_MEM_REG = 37,
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VHOST_USER_REM_MEM_REG = 38,
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VHOST_USER_MAX
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};
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typedef struct {
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enum vhost_user_request request;
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#define VHOST_USER_VERSION_MASK 0x3
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#define VHOST_USER_REPLY_MASK (0x1 << 2)
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#define VHOST_USER_NEED_REPLY_MASK (0x1 << 3)
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uint32_t flags;
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uint32_t size; /* the following payload size */
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} __attribute__ ((__packed__)) vhost_user_header;
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typedef struct VhostUserMemory_region {
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uint64_t guest_phys_addr;
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uint64_t memory_size;
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uint64_t userspace_addr;
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uint64_t mmap_offset;
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} VhostUserMemory_region;
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struct VhostUserMemory {
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uint32_t nregions;
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uint32_t padding;
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struct VhostUserMemory_region regions[VHOST_MEMORY_BASELINE_NREGIONS];
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};
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typedef union {
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#define VHOST_USER_VRING_IDX_MASK 0xff
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#define VHOST_USER_VRING_NOFD_MASK (0x1 << 8)
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uint64_t u64;
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struct vhost_vring_state state;
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struct vhost_vring_addr addr;
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struct VhostUserMemory memory;
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} vhost_user_payload;
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typedef struct VhostUserMsg {
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vhost_user_header hdr;
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vhost_user_payload payload;
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int fds[VHOST_MEMORY_BASELINE_NREGIONS];
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int fd_num;
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uint8_t *data;
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} __attribute__ ((__packed__)) VhostUserMsg;
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#define VHOST_USER_HDR_SIZE sizeof(vhost_user_header)
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#define VHOST_USER_RX_QUEUE 0
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#define VHOST_USER_TX_QUEUE 1
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static inline bool vu_queue_enabled(VuVirtq *vq)
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{
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return vq->enable;
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}
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static inline bool vu_queue_started(const VuVirtq *vq)
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{
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return vq->started;
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}
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size_t tap_send_frames_vu(const struct ctx *c, const struct iovec *iov,
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size_t n);
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int vu_send(const struct ctx *c, const void *data, size_t len);
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void vu_print_capabilities(void);
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void vu_init(struct ctx *c);
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void vu_kick_cb(struct ctx *c, union epoll_ref ref);
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void tap_handler_vu(struct ctx *c, uint32_t events);
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#endif /* VHOST_USER_H */
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