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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>
49 #include "rte_vhost.h"
51 /* Used to indicate that the device is running on a data core */
52 #define VIRTIO_DEV_RUNNING 1
53 /* Used to indicate that the device is ready to operate */
54 #define VIRTIO_DEV_READY 2
56 /* Backend value set by guest. */
57 #define VIRTIO_DEV_STOPPED -1
59 #define BUF_VECTOR_MAX 256
62 * Structure contains buffer address, length and descriptor index
63 * from vring to do scatter RX.
72 * A structure to hold some fields needed in zero copy code path,
73 * mainly for associating an mbuf with the right desc_idx.
76 struct rte_mbuf *mbuf;
80 TAILQ_ENTRY(zcopy_mbuf) next;
82 TAILQ_HEAD(zcopy_mbuf_list, zcopy_mbuf);
85 * Structure contains the info for each batched memory copy.
87 struct batch_copy_elem {
95 * Structure contains variables relevant to RX/TX virtqueues.
97 struct vhost_virtqueue {
98 struct vring_desc *desc;
99 struct vring_avail *avail;
100 struct vring_used *used;
103 uint16_t last_avail_idx;
104 uint16_t last_used_idx;
105 #define VIRTIO_INVALID_EVENTFD (-1)
106 #define VIRTIO_UNINITIALIZED_EVENTFD (-2)
108 /* Backend value to determine if device should started/stopped */
110 /* Used to notify the guest (trigger interrupt) */
112 /* Currently unused as polling mode is enabled */
116 /* Physical address of used ring, for logging */
117 uint64_t log_guest_addr;
121 uint16_t last_zmbuf_idx;
122 struct zcopy_mbuf *zmbufs;
123 struct zcopy_mbuf_list zmbuf_list;
125 struct vring_used_elem *shadow_used_ring;
126 uint16_t shadow_used_idx;
128 struct batch_copy_elem *batch_copy_elems;
129 uint16_t batch_copy_nb_elems;
130 } __rte_cache_aligned;
132 /* Old kernels have no such macros defined */
133 #ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
134 #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
137 #ifndef VIRTIO_NET_F_MQ
138 #define VIRTIO_NET_F_MQ 22
141 #define VHOST_MAX_VRING 0x100
142 #define VHOST_MAX_QUEUE_PAIRS 0x80
144 #ifndef VIRTIO_NET_F_MTU
145 #define VIRTIO_NET_F_MTU 3
148 /* Declare IOMMU related bits for older kernels */
149 #ifndef VIRTIO_F_IOMMU_PLATFORM
151 #define VIRTIO_F_IOMMU_PLATFORM 33
153 struct vhost_iotlb_msg {
157 #define VHOST_ACCESS_RO 0x1
158 #define VHOST_ACCESS_WO 0x2
159 #define VHOST_ACCESS_RW 0x3
161 #define VHOST_IOTLB_MISS 1
162 #define VHOST_IOTLB_UPDATE 2
163 #define VHOST_IOTLB_INVALIDATE 3
164 #define VHOST_IOTLB_ACCESS_FAIL 4
168 #define VHOST_IOTLB_MSG 0x1
173 struct vhost_iotlb_msg iotlb;
180 * Define virtio 1.0 for older kernels
182 #ifndef VIRTIO_F_VERSION_1
183 #define VIRTIO_F_VERSION_1 32
186 #define VHOST_USER_F_PROTOCOL_FEATURES 30
188 /* Features supported by this builtin vhost-user net driver. */
189 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
190 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
191 (1ULL << VIRTIO_NET_F_CTRL_RX) | \
192 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
193 (1ULL << VIRTIO_NET_F_MQ) | \
194 (1ULL << VIRTIO_F_VERSION_1) | \
195 (1ULL << VHOST_F_LOG_ALL) | \
196 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
197 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
198 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
199 (1ULL << VIRTIO_NET_F_CSUM) | \
200 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
201 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
202 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
203 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
204 (1ULL << VIRTIO_NET_F_MTU))
208 uint64_t guest_phys_addr;
209 uint64_t host_phys_addr;
214 * Device structure contains all configuration information relating
218 /* Frontend (QEMU) memory and memory region information */
219 struct rte_vhost_memory *mem;
221 uint64_t protocol_features;
225 /* to tell if we need broadcast rarp packet */
226 rte_atomic16_t broadcast_rarp;
228 int dequeue_zero_copy;
229 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
230 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
231 char ifname[IF_NAME_SZ];
235 struct ether_addr mac;
238 struct vhost_device_ops const *notify_ops;
240 uint32_t nr_guest_pages;
241 uint32_t max_guest_pages;
242 struct guest_page *guest_pages;
245 } __rte_cache_aligned;
248 #define VHOST_LOG_PAGE 4096
251 * Atomically set a bit in memory.
253 static __rte_always_inline void
254 vhost_set_bit(unsigned int nr, volatile uint8_t *addr)
256 __sync_fetch_and_or_8(addr, (1U << nr));
259 static __rte_always_inline void
260 vhost_log_page(uint8_t *log_base, uint64_t page)
262 vhost_set_bit(page % 8, &log_base[page / 8]);
265 static __rte_always_inline void
266 vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len)
270 if (likely(((dev->features & (1ULL << VHOST_F_LOG_ALL)) == 0) ||
271 !dev->log_base || !len))
274 if (unlikely(dev->log_size <= ((addr + len - 1) / VHOST_LOG_PAGE / 8)))
277 /* To make sure guest memory updates are committed before logging */
280 page = addr / VHOST_LOG_PAGE;
281 while (page * VHOST_LOG_PAGE < addr + len) {
282 vhost_log_page((uint8_t *)(uintptr_t)dev->log_base, page);
287 static __rte_always_inline void
288 vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq,
289 uint64_t offset, uint64_t len)
291 vhost_log_write(dev, vq->log_guest_addr + offset, len);
294 /* Macros for printing using RTE_LOG */
295 #define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
296 #define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1
298 #ifdef RTE_LIBRTE_VHOST_DEBUG
299 #define VHOST_MAX_PRINT_BUFF 6072
300 #define LOG_LEVEL RTE_LOG_DEBUG
301 #define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
302 #define PRINT_PACKET(device, addr, size, header) do { \
303 char *pkt_addr = (char *)(addr); \
304 unsigned int index; \
305 char packet[VHOST_MAX_PRINT_BUFF]; \
308 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
310 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
311 for (index = 0; index < (size); index++) { \
312 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
313 "%02hhx ", pkt_addr[index]); \
315 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
317 LOG_DEBUG(VHOST_DATA, "%s", packet); \
320 #define LOG_LEVEL RTE_LOG_INFO
321 #define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
322 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
325 extern uint64_t VHOST_FEATURES;
326 #define MAX_VHOST_DEVICE 1024
327 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
329 /* Convert guest physical address to host physical address */
330 static __rte_always_inline phys_addr_t
331 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
334 struct guest_page *page;
336 for (i = 0; i < dev->nr_guest_pages; i++) {
337 page = &dev->guest_pages[i];
339 if (gpa >= page->guest_phys_addr &&
340 gpa + size < page->guest_phys_addr + page->size) {
341 return gpa - page->guest_phys_addr +
342 page->host_phys_addr;
349 struct virtio_net *get_device(int vid);
351 int vhost_new_device(void);
352 void cleanup_device(struct virtio_net *dev, int destroy);
353 void reset_device(struct virtio_net *dev);
354 void vhost_destroy_device(int);
356 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
358 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
359 void vhost_enable_dequeue_zero_copy(int vid);
361 struct vhost_device_ops const *vhost_driver_callback_get(const char *path);
364 * Backend-specific cleanup.
366 * TODO: fix it; we have one backend now
368 void vhost_backend_cleanup(struct virtio_net *dev);
370 #endif /* _VHOST_NET_CDEV_H_ */