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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 uint16_t last_avail_idx;
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 uint64_t guest_phys_addr;
119 uint64_t host_phys_addr;
124 * Device structure contains all configuration information relating
128 /* Frontend (QEMU) memory and memory region information */
129 struct virtio_memory *mem;
131 uint64_t protocol_features;
135 /* to tell if we need broadcast rarp packet */
136 rte_atomic16_t broadcast_rarp;
138 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
139 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
140 char ifname[IF_NAME_SZ];
144 struct ether_addr mac;
146 uint32_t nr_guest_pages;
147 uint32_t max_guest_pages;
148 struct guest_page *guest_pages;
150 } __rte_cache_aligned;
153 * Information relating to memory regions including offsets to
154 * addresses in QEMUs memory file.
156 struct virtio_memory_region {
157 uint64_t guest_phys_addr;
158 uint64_t guest_user_addr;
159 uint64_t host_user_addr;
168 * Memory structure includes region and mapping information.
170 struct virtio_memory {
172 struct virtio_memory_region regions[0];
176 /* Macros for printing using RTE_LOG */
177 #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
178 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1
180 #ifdef RTE_LIBRTE_VHOST_DEBUG
181 #define VHOST_MAX_PRINT_BUFF 6072
182 #define LOG_LEVEL RTE_LOG_DEBUG
183 #define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
184 #define PRINT_PACKET(device, addr, size, header) do { \
185 char *pkt_addr = (char *)(addr); \
186 unsigned int index; \
187 char packet[VHOST_MAX_PRINT_BUFF]; \
190 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
192 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
193 for (index = 0; index < (size); index++) { \
194 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
195 "%02hhx ", pkt_addr[index]); \
197 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
199 LOG_DEBUG(VHOST_DATA, "%s", packet); \
202 #define LOG_LEVEL RTE_LOG_INFO
203 #define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
204 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
207 extern uint64_t VHOST_FEATURES;
208 #define MAX_VHOST_DEVICE 1024
209 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
211 /* Convert guest physical Address to host virtual address */
212 static inline uint64_t __attribute__((always_inline))
213 gpa_to_vva(struct virtio_net *dev, uint64_t gpa)
215 struct virtio_memory_region *reg;
218 for (i = 0; i < dev->mem->nregions; i++) {
219 reg = &dev->mem->regions[i];
220 if (gpa >= reg->guest_phys_addr &&
221 gpa < reg->guest_phys_addr + reg->size) {
222 return gpa - reg->guest_phys_addr +
230 /* Convert guest physical address to host physical address */
231 static inline phys_addr_t __attribute__((always_inline))
232 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
235 struct guest_page *page;
237 for (i = 0; i < dev->nr_guest_pages; i++) {
238 page = &dev->guest_pages[i];
240 if (gpa >= page->guest_phys_addr &&
241 gpa + size < page->guest_phys_addr + page->size) {
242 return gpa - page->guest_phys_addr +
243 page->host_phys_addr;
250 struct virtio_net_device_ops const *notify_ops;
251 struct virtio_net *get_device(int vid);
253 int vhost_new_device(void);
254 void cleanup_device(struct virtio_net *dev, int destroy);
255 void reset_device(struct virtio_net *dev);
256 void vhost_destroy_device(int);
258 int alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx);
260 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
263 * Backend-specific cleanup. Defined by vhost-cuse and vhost-user.
265 void vhost_backend_cleanup(struct virtio_net *dev);
267 #endif /* _VHOST_NET_CDEV_H_ */