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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>
42 #include <linux/virtio_net.h>
43 #include <sys/socket.h>
47 #include <rte_ether.h>
48 #include <rte_rwlock.h>
50 #include "rte_vhost.h"
52 /* Used to indicate that the device is running on a data core */
53 #define VIRTIO_DEV_RUNNING 1
54 /* Used to indicate that the device is ready to operate */
55 #define VIRTIO_DEV_READY 2
57 /* Backend value set by guest. */
58 #define VIRTIO_DEV_STOPPED -1
60 #define BUF_VECTOR_MAX 256
63 * Structure contains buffer address, length and descriptor index
64 * from vring to do scatter RX.
73 * A structure to hold some fields needed in zero copy code path,
74 * mainly for associating an mbuf with the right desc_idx.
77 struct rte_mbuf *mbuf;
81 TAILQ_ENTRY(zcopy_mbuf) next;
83 TAILQ_HEAD(zcopy_mbuf_list, zcopy_mbuf);
86 * Structure contains the info for each batched memory copy.
88 struct batch_copy_elem {
96 * Structure contains variables relevant to RX/TX virtqueues.
98 struct vhost_virtqueue {
99 struct vring_desc *desc;
100 struct vring_avail *avail;
101 struct vring_used *used;
104 uint16_t last_avail_idx;
105 uint16_t last_used_idx;
106 #define VIRTIO_INVALID_EVENTFD (-1)
107 #define VIRTIO_UNINITIALIZED_EVENTFD (-2)
109 /* Backend value to determine if device should started/stopped */
111 /* Used to notify the guest (trigger interrupt) */
113 /* Currently unused as polling mode is enabled */
117 /* Physical address of used ring, for logging */
118 uint64_t log_guest_addr;
122 uint16_t last_zmbuf_idx;
123 struct zcopy_mbuf *zmbufs;
124 struct zcopy_mbuf_list zmbuf_list;
126 struct vring_used_elem *shadow_used_ring;
127 uint16_t shadow_used_idx;
129 struct batch_copy_elem *batch_copy_elems;
130 uint16_t batch_copy_nb_elems;
132 rte_rwlock_t iotlb_lock;
133 struct rte_mempool *iotlb_pool;
134 TAILQ_HEAD(, vhost_iotlb_entry) iotlb_list;
136 } __rte_cache_aligned;
138 /* Old kernels have no such macros defined */
139 #ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
140 #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
143 #ifndef VIRTIO_NET_F_MQ
144 #define VIRTIO_NET_F_MQ 22
147 #define VHOST_MAX_VRING 0x100
148 #define VHOST_MAX_QUEUE_PAIRS 0x80
150 #ifndef VIRTIO_NET_F_MTU
151 #define VIRTIO_NET_F_MTU 3
154 /* Declare IOMMU related bits for older kernels */
155 #ifndef VIRTIO_F_IOMMU_PLATFORM
157 #define VIRTIO_F_IOMMU_PLATFORM 33
159 struct vhost_iotlb_msg {
163 #define VHOST_ACCESS_RO 0x1
164 #define VHOST_ACCESS_WO 0x2
165 #define VHOST_ACCESS_RW 0x3
167 #define VHOST_IOTLB_MISS 1
168 #define VHOST_IOTLB_UPDATE 2
169 #define VHOST_IOTLB_INVALIDATE 3
170 #define VHOST_IOTLB_ACCESS_FAIL 4
174 #define VHOST_IOTLB_MSG 0x1
179 struct vhost_iotlb_msg iotlb;
186 * Define virtio 1.0 for older kernels
188 #ifndef VIRTIO_F_VERSION_1
189 #define VIRTIO_F_VERSION_1 32
192 #define VHOST_USER_F_PROTOCOL_FEATURES 30
194 /* Features supported by this builtin vhost-user net driver. */
195 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
196 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
197 (1ULL << VIRTIO_NET_F_CTRL_RX) | \
198 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
199 (1ULL << VIRTIO_NET_F_MQ) | \
200 (1ULL << VIRTIO_F_VERSION_1) | \
201 (1ULL << VHOST_F_LOG_ALL) | \
202 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
203 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
204 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
205 (1ULL << VIRTIO_NET_F_CSUM) | \
206 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
207 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
208 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
209 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
210 (1ULL << VIRTIO_NET_F_MTU))
214 uint64_t guest_phys_addr;
215 uint64_t host_phys_addr;
220 * Device structure contains all configuration information relating
224 /* Frontend (QEMU) memory and memory region information */
225 struct rte_vhost_memory *mem;
227 uint64_t protocol_features;
231 /* to tell if we need broadcast rarp packet */
232 rte_atomic16_t broadcast_rarp;
234 int dequeue_zero_copy;
235 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
236 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
237 char ifname[IF_NAME_SZ];
241 struct ether_addr mac;
244 struct vhost_device_ops const *notify_ops;
246 uint32_t nr_guest_pages;
247 uint32_t max_guest_pages;
248 struct guest_page *guest_pages;
251 } __rte_cache_aligned;
254 #define VHOST_LOG_PAGE 4096
257 * Atomically set a bit in memory.
259 static __rte_always_inline void
260 vhost_set_bit(unsigned int nr, volatile uint8_t *addr)
262 __sync_fetch_and_or_8(addr, (1U << nr));
265 static __rte_always_inline void
266 vhost_log_page(uint8_t *log_base, uint64_t page)
268 vhost_set_bit(page % 8, &log_base[page / 8]);
271 static __rte_always_inline void
272 vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len)
276 if (likely(((dev->features & (1ULL << VHOST_F_LOG_ALL)) == 0) ||
277 !dev->log_base || !len))
280 if (unlikely(dev->log_size <= ((addr + len - 1) / VHOST_LOG_PAGE / 8)))
283 /* To make sure guest memory updates are committed before logging */
286 page = addr / VHOST_LOG_PAGE;
287 while (page * VHOST_LOG_PAGE < addr + len) {
288 vhost_log_page((uint8_t *)(uintptr_t)dev->log_base, page);
293 static __rte_always_inline void
294 vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq,
295 uint64_t offset, uint64_t len)
297 vhost_log_write(dev, vq->log_guest_addr + offset, len);
300 /* Macros for printing using RTE_LOG */
301 #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
302 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1
304 #ifdef RTE_LIBRTE_VHOST_DEBUG
305 #define VHOST_MAX_PRINT_BUFF 6072
306 #define LOG_LEVEL RTE_LOG_DEBUG
307 #define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
308 #define PRINT_PACKET(device, addr, size, header) do { \
309 char *pkt_addr = (char *)(addr); \
310 unsigned int index; \
311 char packet[VHOST_MAX_PRINT_BUFF]; \
314 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
316 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
317 for (index = 0; index < (size); index++) { \
318 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
319 "%02hhx ", pkt_addr[index]); \
321 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
323 LOG_DEBUG(VHOST_DATA, "%s", packet); \
326 #define LOG_LEVEL RTE_LOG_INFO
327 #define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
328 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
331 extern uint64_t VHOST_FEATURES;
332 #define MAX_VHOST_DEVICE 1024
333 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
335 /* Convert guest physical address to host physical address */
336 static __rte_always_inline phys_addr_t
337 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
340 struct guest_page *page;
342 for (i = 0; i < dev->nr_guest_pages; i++) {
343 page = &dev->guest_pages[i];
345 if (gpa >= page->guest_phys_addr &&
346 gpa + size < page->guest_phys_addr + page->size) {
347 return gpa - page->guest_phys_addr +
348 page->host_phys_addr;
355 struct virtio_net *get_device(int vid);
357 int vhost_new_device(void);
358 void cleanup_device(struct virtio_net *dev, int destroy);
359 void reset_device(struct virtio_net *dev);
360 void vhost_destroy_device(int);
362 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
364 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
365 void vhost_enable_dequeue_zero_copy(int vid);
367 struct vhost_device_ops const *vhost_driver_callback_get(const char *path);
370 * Backend-specific cleanup.
372 * TODO: fix it; we have one backend now
374 void vhost_backend_cleanup(struct virtio_net *dev);
376 #endif /* _VHOST_NET_CDEV_H_ */