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34 #ifndef _VHOST_NET_CDEV_H_
35 #define _VHOST_NET_CDEV_H_
38 #include <sys/types.h>
40 #include <linux/vhost.h>
44 #include "rte_virtio_net.h"
46 /* Used to indicate that the device is running on a data core */
47 #define VIRTIO_DEV_RUNNING 1
49 /* Backend value set by guest. */
50 #define VIRTIO_DEV_STOPPED -1
52 #define BUF_VECTOR_MAX 256
55 * Structure contains buffer address, length and descriptor index
56 * from vring to do scatter RX.
65 * Structure contains variables relevant to RX/TX virtqueues.
67 struct vhost_virtqueue {
68 struct vring_desc *desc;
69 struct vring_avail *avail;
70 struct vring_used *used;
73 /* Last index used on the available ring */
74 volatile uint16_t last_used_idx;
75 #define VIRTIO_INVALID_EVENTFD (-1)
76 #define VIRTIO_UNINITIALIZED_EVENTFD (-2)
78 /* Backend value to determine if device should started/stopped */
80 /* Used to notify the guest (trigger interrupt) */
82 /* Currently unused as polling mode is enabled */
86 /* Physical address of used ring, for logging */
87 uint64_t log_guest_addr;
88 } __rte_cache_aligned;
90 /* Old kernels have no such macro defined */
91 #ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
92 #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
97 * Make an extra wrapper for VIRTIO_NET_F_MQ and
98 * VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX as they are
99 * introduced since kernel v3.8. This makes our
100 * code buildable for older kernel.
102 #ifdef VIRTIO_NET_F_MQ
103 #define VHOST_MAX_QUEUE_PAIRS VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX
104 #define VHOST_SUPPORTS_MQ (1ULL << VIRTIO_NET_F_MQ)
106 #define VHOST_MAX_QUEUE_PAIRS 1
107 #define VHOST_SUPPORTS_MQ 0
111 * Define virtio 1.0 for older kernels
113 #ifndef VIRTIO_F_VERSION_1
114 #define VIRTIO_F_VERSION_1 32
118 * Device structure contains all configuration information relating
122 /* Frontend (QEMU) memory and memory region information */
123 struct virtio_memory *mem;
125 uint64_t protocol_features;
129 /* to tell if we need broadcast rarp packet */
130 rte_atomic16_t broadcast_rarp;
132 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
133 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
134 char ifname[IF_NAME_SZ];
138 struct ether_addr mac;
140 } __rte_cache_aligned;
143 * Information relating to memory regions including offsets to
144 * addresses in QEMUs memory file.
146 struct virtio_memory_region {
147 uint64_t guest_phys_addr;
148 uint64_t guest_user_addr;
149 uint64_t host_user_addr;
158 * Memory structure includes region and mapping information.
160 struct virtio_memory {
162 struct virtio_memory_region regions[0];
166 /* Macros for printing using RTE_LOG */
167 #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
168 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1
170 #ifdef RTE_LIBRTE_VHOST_DEBUG
171 #define VHOST_MAX_PRINT_BUFF 6072
172 #define LOG_LEVEL RTE_LOG_DEBUG
173 #define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
174 #define PRINT_PACKET(device, addr, size, header) do { \
175 char *pkt_addr = (char *)(addr); \
176 unsigned int index; \
177 char packet[VHOST_MAX_PRINT_BUFF]; \
180 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
182 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
183 for (index = 0; index < (size); index++) { \
184 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
185 "%02hhx ", pkt_addr[index]); \
187 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
189 LOG_DEBUG(VHOST_DATA, "%s", packet); \
192 #define LOG_LEVEL RTE_LOG_INFO
193 #define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
194 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
197 extern uint64_t VHOST_FEATURES;
198 #define MAX_VHOST_DEVICE 1024
199 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
201 /* Convert guest physical Address to host virtual address */
202 static inline uint64_t __attribute__((always_inline))
203 gpa_to_vva(struct virtio_net *dev, uint64_t gpa)
205 struct virtio_memory_region *reg;
208 for (i = 0; i < dev->mem->nregions; i++) {
209 reg = &dev->mem->regions[i];
210 if (gpa >= reg->guest_phys_addr &&
211 gpa < reg->guest_phys_addr + reg->size) {
212 return gpa - reg->guest_phys_addr +
220 struct virtio_net_device_ops const *notify_ops;
221 struct virtio_net *get_device(int vid);
223 int vhost_new_device(void);
224 void cleanup_device(struct virtio_net *dev, int destroy);
225 void reset_device(struct virtio_net *dev);
226 void vhost_destroy_device(int);
228 int alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx);
230 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
233 * Backend-specific cleanup. Defined by vhost-cuse and vhost-user.
235 void vhost_backend_cleanup(struct virtio_net *dev);
237 #endif /* _VHOST_NET_CDEV_H_ */