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34 #ifndef _VHOST_NET_CDEV_H_
35 #define _VHOST_NET_CDEV_H_
38 #include <sys/types.h>
39 #include <sys/queue.h>
41 #include <linux/vhost.h>
45 #include "rte_virtio_net.h"
47 /* Used to indicate that the device is running on a data core */
48 #define VIRTIO_DEV_RUNNING 1
49 /* Used to indicate that the device is ready to operate */
50 #define VIRTIO_DEV_READY 2
52 /* Backend value set by guest. */
53 #define VIRTIO_DEV_STOPPED -1
55 #define BUF_VECTOR_MAX 256
58 * Structure contains buffer address, length and descriptor index
59 * from vring to do scatter RX.
68 * A structure to hold some fields needed in zero copy code path,
69 * mainly for associating an mbuf with the right desc_idx.
72 struct rte_mbuf *mbuf;
76 TAILQ_ENTRY(zcopy_mbuf) next;
78 TAILQ_HEAD(zcopy_mbuf_list, zcopy_mbuf);
81 * Structure contains variables relevant to RX/TX virtqueues.
83 struct vhost_virtqueue {
84 struct vring_desc *desc;
85 struct vring_avail *avail;
86 struct vring_used *used;
89 uint16_t last_avail_idx;
90 uint16_t last_used_idx;
91 #define VIRTIO_INVALID_EVENTFD (-1)
92 #define VIRTIO_UNINITIALIZED_EVENTFD (-2)
94 /* Backend value to determine if device should started/stopped */
96 /* Used to notify the guest (trigger interrupt) */
98 /* Currently unused as polling mode is enabled */
102 /* Physical address of used ring, for logging */
103 uint64_t log_guest_addr;
107 uint16_t last_zmbuf_idx;
108 struct zcopy_mbuf *zmbufs;
109 struct zcopy_mbuf_list zmbuf_list;
111 struct vring_used_elem *shadow_used_ring;
112 uint16_t shadow_used_idx;
113 } __rte_cache_aligned;
115 /* Old kernels have no such macros defined */
116 #ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
117 #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
120 #ifndef VIRTIO_NET_F_MQ
121 #define VIRTIO_NET_F_MQ 22
124 #define VHOST_MAX_VRING 0x100
125 #define VHOST_MAX_QUEUE_PAIRS 0x80
127 #ifndef VIRTIO_NET_F_MTU
128 #define VIRTIO_NET_F_MTU 3
132 * Define virtio 1.0 for older kernels
134 #ifndef VIRTIO_F_VERSION_1
135 #define VIRTIO_F_VERSION_1 32
138 #define VHOST_USER_F_PROTOCOL_FEATURES 30
140 /* Features supported by this builtin vhost-user net driver. */
141 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
142 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
143 (1ULL << VIRTIO_NET_F_CTRL_RX) | \
144 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
145 (1ULL << VIRTIO_NET_F_MQ) | \
146 (1ULL << VIRTIO_F_VERSION_1) | \
147 (1ULL << VHOST_F_LOG_ALL) | \
148 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
149 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
150 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
151 (1ULL << VIRTIO_NET_F_CSUM) | \
152 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
153 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
154 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
155 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
156 (1ULL << VIRTIO_NET_F_MTU))
160 uint64_t guest_phys_addr;
161 uint64_t host_phys_addr;
166 * Device structure contains all configuration information relating
170 /* Frontend (QEMU) memory and memory region information */
171 struct rte_vhost_memory *mem;
173 uint64_t protocol_features;
177 /* to tell if we need broadcast rarp packet */
178 rte_atomic16_t broadcast_rarp;
180 int dequeue_zero_copy;
181 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
182 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
183 char ifname[IF_NAME_SZ];
187 struct ether_addr mac;
190 struct virtio_net_device_ops const *notify_ops;
192 uint32_t nr_guest_pages;
193 uint32_t max_guest_pages;
194 struct guest_page *guest_pages;
195 } __rte_cache_aligned;
197 /* Macros for printing using RTE_LOG */
198 #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
199 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1
201 #ifdef RTE_LIBRTE_VHOST_DEBUG
202 #define VHOST_MAX_PRINT_BUFF 6072
203 #define LOG_LEVEL RTE_LOG_DEBUG
204 #define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
205 #define PRINT_PACKET(device, addr, size, header) do { \
206 char *pkt_addr = (char *)(addr); \
207 unsigned int index; \
208 char packet[VHOST_MAX_PRINT_BUFF]; \
211 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
213 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
214 for (index = 0; index < (size); index++) { \
215 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
216 "%02hhx ", pkt_addr[index]); \
218 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
220 LOG_DEBUG(VHOST_DATA, "%s", packet); \
223 #define LOG_LEVEL RTE_LOG_INFO
224 #define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
225 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
228 extern uint64_t VHOST_FEATURES;
229 #define MAX_VHOST_DEVICE 1024
230 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
232 /* Convert guest physical address to host physical address */
233 static inline phys_addr_t __attribute__((always_inline))
234 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
237 struct guest_page *page;
239 for (i = 0; i < dev->nr_guest_pages; i++) {
240 page = &dev->guest_pages[i];
242 if (gpa >= page->guest_phys_addr &&
243 gpa + size < page->guest_phys_addr + page->size) {
244 return gpa - page->guest_phys_addr +
245 page->host_phys_addr;
252 struct virtio_net *get_device(int vid);
254 int vhost_new_device(void);
255 void cleanup_device(struct virtio_net *dev, int destroy);
256 void reset_device(struct virtio_net *dev);
257 void vhost_destroy_device(int);
259 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
261 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
262 void vhost_enable_dequeue_zero_copy(int vid);
264 struct virtio_net_device_ops const *vhost_driver_callback_get(const char *path);
267 * Backend-specific cleanup.
269 * TODO: fix it; we have one backend now
271 void vhost_backend_cleanup(struct virtio_net *dev);
273 #endif /* _VHOST_NET_CDEV_H_ */