1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
5 #ifndef _VHOST_NET_CDEV_H_
6 #define _VHOST_NET_CDEV_H_
10 #include <sys/types.h>
11 #include <sys/queue.h>
13 #include <linux/vhost.h>
14 #include <linux/virtio_net.h>
15 #include <sys/socket.h>
19 #include <rte_ether.h>
20 #include <rte_rwlock.h>
21 #include <rte_malloc.h>
23 #include "rte_vhost.h"
25 #include "rte_vdpa_dev.h"
27 #include "rte_vhost_async.h"
29 /* Used to indicate that the device is running on a data core */
30 #define VIRTIO_DEV_RUNNING 1
31 /* Used to indicate that the device is ready to operate */
32 #define VIRTIO_DEV_READY 2
33 /* Used to indicate that the built-in vhost net device backend is enabled */
34 #define VIRTIO_DEV_BUILTIN_VIRTIO_NET 4
35 /* Used to indicate that the device has its own data path and configured */
36 #define VIRTIO_DEV_VDPA_CONFIGURED 8
37 /* Used to indicate that the feature negotiation failed */
38 #define VIRTIO_DEV_FEATURES_FAILED 16
40 /* Backend value set by guest. */
41 #define VIRTIO_DEV_STOPPED -1
43 #define BUF_VECTOR_MAX 256
45 #define VHOST_LOG_CACHE_NR 32
47 #define MAX_PKT_BURST 32
49 #define VHOST_MAX_ASYNC_IT (MAX_PKT_BURST * 2)
50 #define VHOST_MAX_ASYNC_VEC (BUF_VECTOR_MAX * 2)
52 #define PACKED_DESC_ENQUEUE_USED_FLAG(w) \
53 ((w) ? (VRING_DESC_F_AVAIL | VRING_DESC_F_USED | VRING_DESC_F_WRITE) : \
55 #define PACKED_DESC_DEQUEUE_USED_FLAG(w) \
56 ((w) ? (VRING_DESC_F_AVAIL | VRING_DESC_F_USED) : 0x0)
57 #define PACKED_DESC_SINGLE_DEQUEUE_FLAG (VRING_DESC_F_NEXT | \
58 VRING_DESC_F_INDIRECT)
60 #define PACKED_BATCH_SIZE (RTE_CACHE_LINE_SIZE / \
61 sizeof(struct vring_packed_desc))
62 #define PACKED_BATCH_MASK (PACKED_BATCH_SIZE - 1)
64 #ifdef VHOST_GCC_UNROLL_PRAGMA
65 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("GCC unroll 4") \
66 for (iter = val; iter < size; iter++)
69 #ifdef VHOST_CLANG_UNROLL_PRAGMA
70 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("unroll 4") \
71 for (iter = val; iter < size; iter++)
74 #ifdef VHOST_ICC_UNROLL_PRAGMA
75 #define vhost_for_each_try_unroll(iter, val, size) _Pragma("unroll (4)") \
76 for (iter = val; iter < size; iter++)
79 #ifndef vhost_for_each_try_unroll
80 #define vhost_for_each_try_unroll(iter, val, num) \
81 for (iter = val; iter < num; iter++)
85 * Structure contains buffer address, length and descriptor index
86 * from vring to do scatter RX.
96 * A structure to hold some fields needed in zero copy code path,
97 * mainly for associating an mbuf with the right desc_idx.
100 struct rte_mbuf *mbuf;
105 TAILQ_ENTRY(zcopy_mbuf) next;
107 TAILQ_HEAD(zcopy_mbuf_list, zcopy_mbuf);
110 * Structure contains the info for each batched memory copy.
112 struct batch_copy_elem {
120 * Structure that contains the info for batched dirty logging.
122 struct log_cache_entry {
127 struct vring_used_elem_packed {
135 * Structure contains variables relevant to RX/TX virtqueues.
137 struct vhost_virtqueue {
139 struct vring_desc *desc;
140 struct vring_packed_desc *desc_packed;
143 struct vring_avail *avail;
144 struct vring_packed_desc_event *driver_event;
147 struct vring_used *used;
148 struct vring_packed_desc_event *device_event;
152 uint16_t last_avail_idx;
153 uint16_t last_used_idx;
154 /* Last used index we notify to front end. */
155 uint16_t signalled_used;
156 bool signalled_used_valid;
157 #define VIRTIO_INVALID_EVENTFD (-1)
158 #define VIRTIO_UNINITIALIZED_EVENTFD (-2)
160 /* Backend value to determine if device should started/stopped */
165 rte_spinlock_t access_lock;
167 /* Used to notify the guest (trigger interrupt) */
169 /* Currently unused as polling mode is enabled */
172 /* Physical address of used ring, for logging */
173 uint64_t log_guest_addr;
175 /* inflight share memory info */
177 struct rte_vhost_inflight_info_split *inflight_split;
178 struct rte_vhost_inflight_info_packed *inflight_packed;
180 struct rte_vhost_resubmit_info *resubmit_inflight;
181 uint64_t global_counter;
185 uint16_t last_zmbuf_idx;
186 struct zcopy_mbuf *zmbufs;
187 struct zcopy_mbuf_list zmbuf_list;
190 struct vring_used_elem *shadow_used_split;
191 struct vring_used_elem_packed *shadow_used_packed;
193 uint16_t shadow_used_idx;
194 /* Record packed ring enqueue latest desc cache aligned index */
195 uint16_t shadow_aligned_idx;
196 /* Record packed ring first dequeue desc index */
197 uint16_t shadow_last_used_idx;
198 struct vhost_vring_addr ring_addrs;
200 struct batch_copy_elem *batch_copy_elems;
201 uint16_t batch_copy_nb_elems;
202 bool used_wrap_counter;
203 bool avail_wrap_counter;
205 struct log_cache_entry log_cache[VHOST_LOG_CACHE_NR];
206 uint16_t log_cache_nb_elem;
208 rte_rwlock_t iotlb_lock;
209 rte_rwlock_t iotlb_pending_lock;
210 struct rte_mempool *iotlb_pool;
211 TAILQ_HEAD(, vhost_iotlb_entry) iotlb_list;
213 TAILQ_HEAD(, vhost_iotlb_entry) iotlb_pending_list;
215 /* operation callbacks for async dma */
216 struct rte_vhost_async_channel_ops async_ops;
218 struct rte_vhost_iov_iter it_pool[VHOST_MAX_ASYNC_IT];
219 struct iovec vec_pool[VHOST_MAX_ASYNC_VEC];
221 /* async data transfer status */
222 uintptr_t **async_pkts_pending;
223 #define ASYNC_PENDING_INFO_N_MSK 0xFFFF
224 #define ASYNC_PENDING_INFO_N_SFT 16
225 uint64_t *async_pending_info;
226 uint16_t async_pkts_idx;
227 uint16_t async_pkts_inflight_n;
229 /* vq async features */
231 bool async_registered;
232 uint16_t async_threshold;
233 } __rte_cache_aligned;
235 /* Virtio device status as per Virtio specification */
236 #define VIRTIO_DEVICE_STATUS_ACK 0x01
237 #define VIRTIO_DEVICE_STATUS_DRIVER 0x02
238 #define VIRTIO_DEVICE_STATUS_DRIVER_OK 0x04
239 #define VIRTIO_DEVICE_STATUS_FEATURES_OK 0x08
240 #define VIRTIO_DEVICE_STATUS_DEV_NEED_RESET 0x40
241 #define VIRTIO_DEVICE_STATUS_FAILED 0x80
243 #define VHOST_MAX_VRING 0x100
244 #define VHOST_MAX_QUEUE_PAIRS 0x80
246 /* Declare IOMMU related bits for older kernels */
247 #ifndef VIRTIO_F_IOMMU_PLATFORM
249 #define VIRTIO_F_IOMMU_PLATFORM 33
251 struct vhost_iotlb_msg {
255 #define VHOST_ACCESS_RO 0x1
256 #define VHOST_ACCESS_WO 0x2
257 #define VHOST_ACCESS_RW 0x3
259 #define VHOST_IOTLB_MISS 1
260 #define VHOST_IOTLB_UPDATE 2
261 #define VHOST_IOTLB_INVALIDATE 3
262 #define VHOST_IOTLB_ACCESS_FAIL 4
266 #define VHOST_IOTLB_MSG 0x1
271 struct vhost_iotlb_msg iotlb;
278 * Define virtio 1.0 for older kernels
280 #ifndef VIRTIO_F_VERSION_1
281 #define VIRTIO_F_VERSION_1 32
284 /* Declare packed ring related bits for older kernels */
285 #ifndef VIRTIO_F_RING_PACKED
287 #define VIRTIO_F_RING_PACKED 34
289 struct vring_packed_desc {
296 struct vring_packed_desc_event {
303 * Declare below packed ring defines unconditionally
304 * as Kernel header might use different names.
306 #define VRING_DESC_F_AVAIL (1ULL << 7)
307 #define VRING_DESC_F_USED (1ULL << 15)
309 #define VRING_EVENT_F_ENABLE 0x0
310 #define VRING_EVENT_F_DISABLE 0x1
311 #define VRING_EVENT_F_DESC 0x2
314 * Available and used descs are in same order
316 #ifndef VIRTIO_F_IN_ORDER
317 #define VIRTIO_F_IN_ORDER 35
320 /* Features supported by this builtin vhost-user net driver. */
321 #define VIRTIO_NET_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
322 (1ULL << VIRTIO_F_ANY_LAYOUT) | \
323 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
324 (1ULL << VIRTIO_NET_F_CTRL_RX) | \
325 (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
326 (1ULL << VIRTIO_NET_F_MQ) | \
327 (1ULL << VIRTIO_F_VERSION_1) | \
328 (1ULL << VHOST_F_LOG_ALL) | \
329 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
330 (1ULL << VIRTIO_NET_F_GSO) | \
331 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
332 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
333 (1ULL << VIRTIO_NET_F_HOST_UFO) | \
334 (1ULL << VIRTIO_NET_F_HOST_ECN) | \
335 (1ULL << VIRTIO_NET_F_CSUM) | \
336 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
337 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
338 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
339 (1ULL << VIRTIO_NET_F_GUEST_UFO) | \
340 (1ULL << VIRTIO_NET_F_GUEST_ECN) | \
341 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
342 (1ULL << VIRTIO_RING_F_EVENT_IDX) | \
343 (1ULL << VIRTIO_NET_F_MTU) | \
344 (1ULL << VIRTIO_F_IN_ORDER) | \
345 (1ULL << VIRTIO_F_IOMMU_PLATFORM) | \
346 (1ULL << VIRTIO_F_RING_PACKED))
350 uint64_t guest_phys_addr;
351 uint64_t host_phys_addr;
355 struct inflight_mem_info {
362 * Device structure contains all configuration information relating
366 /* Frontend (QEMU) memory and memory region information */
367 struct rte_vhost_memory *mem;
369 uint64_t protocol_features;
373 /* to tell if we need broadcast rarp packet */
374 int16_t broadcast_rarp;
376 int dequeue_zero_copy;
380 struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
381 struct inflight_mem_info *inflight_info;
382 #define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
383 char ifname[IF_NAME_SZ];
387 struct rte_ether_addr mac;
391 struct vhost_device_ops const *notify_ops;
393 uint32_t nr_guest_pages;
394 uint32_t max_guest_pages;
395 struct guest_page *guest_pages;
398 rte_spinlock_t slave_req_lock;
401 int postcopy_listening;
403 struct rte_vdpa_device *vdpa_dev;
405 /* context data for the external message handlers */
407 /* pre and post vhost user message handlers for the device */
408 struct rte_vhost_user_extern_ops extern_ops;
409 } __rte_cache_aligned;
411 static __rte_always_inline bool
412 vq_is_packed(struct virtio_net *dev)
414 return dev->features & (1ull << VIRTIO_F_RING_PACKED);
418 desc_is_avail(struct vring_packed_desc *desc, bool wrap_counter)
420 uint16_t flags = __atomic_load_n(&desc->flags, __ATOMIC_ACQUIRE);
422 return wrap_counter == !!(flags & VRING_DESC_F_AVAIL) &&
423 wrap_counter != !!(flags & VRING_DESC_F_USED);
427 vq_inc_last_used_packed(struct vhost_virtqueue *vq, uint16_t num)
429 vq->last_used_idx += num;
430 if (vq->last_used_idx >= vq->size) {
431 vq->used_wrap_counter ^= 1;
432 vq->last_used_idx -= vq->size;
437 vq_inc_last_avail_packed(struct vhost_virtqueue *vq, uint16_t num)
439 vq->last_avail_idx += num;
440 if (vq->last_avail_idx >= vq->size) {
441 vq->avail_wrap_counter ^= 1;
442 vq->last_avail_idx -= vq->size;
446 void __vhost_log_cache_write(struct virtio_net *dev,
447 struct vhost_virtqueue *vq,
448 uint64_t addr, uint64_t len);
449 void __vhost_log_cache_write_iova(struct virtio_net *dev,
450 struct vhost_virtqueue *vq,
451 uint64_t iova, uint64_t len);
452 void __vhost_log_cache_sync(struct virtio_net *dev,
453 struct vhost_virtqueue *vq);
454 void __vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len);
455 void __vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq,
456 uint64_t iova, uint64_t len);
458 static __rte_always_inline void
459 vhost_log_write(struct virtio_net *dev, uint64_t addr, uint64_t len)
461 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL)))
462 __vhost_log_write(dev, addr, len);
465 static __rte_always_inline void
466 vhost_log_cache_sync(struct virtio_net *dev, struct vhost_virtqueue *vq)
468 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL)))
469 __vhost_log_cache_sync(dev, vq);
472 static __rte_always_inline void
473 vhost_log_cache_write(struct virtio_net *dev, struct vhost_virtqueue *vq,
474 uint64_t addr, uint64_t len)
476 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL)))
477 __vhost_log_cache_write(dev, vq, addr, len);
480 static __rte_always_inline void
481 vhost_log_cache_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq,
482 uint64_t offset, uint64_t len)
484 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) {
485 if (unlikely(vq->log_guest_addr == 0))
487 __vhost_log_cache_write(dev, vq, vq->log_guest_addr + offset,
492 static __rte_always_inline void
493 vhost_log_used_vring(struct virtio_net *dev, struct vhost_virtqueue *vq,
494 uint64_t offset, uint64_t len)
496 if (unlikely(dev->features & (1ULL << VHOST_F_LOG_ALL))) {
497 if (unlikely(vq->log_guest_addr == 0))
499 __vhost_log_write(dev, vq->log_guest_addr + offset, len);
503 static __rte_always_inline void
504 vhost_log_cache_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq,
505 uint64_t iova, uint64_t len)
507 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL))))
510 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
511 __vhost_log_cache_write_iova(dev, vq, iova, len);
513 __vhost_log_cache_write(dev, vq, iova, len);
516 static __rte_always_inline void
517 vhost_log_write_iova(struct virtio_net *dev, struct vhost_virtqueue *vq,
518 uint64_t iova, uint64_t len)
520 if (likely(!(dev->features & (1ULL << VHOST_F_LOG_ALL))))
523 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
524 __vhost_log_write_iova(dev, vq, iova, len);
526 __vhost_log_write(dev, iova, len);
529 extern int vhost_config_log_level;
530 extern int vhost_data_log_level;
532 #define VHOST_LOG_CONFIG(level, fmt, args...) \
533 rte_log(RTE_LOG_ ## level, vhost_config_log_level, \
534 "VHOST_CONFIG: " fmt, ##args)
536 #define VHOST_LOG_DATA(level, fmt, args...) \
537 (void)((RTE_LOG_ ## level <= RTE_LOG_DP_LEVEL) ? \
538 rte_log(RTE_LOG_ ## level, vhost_data_log_level, \
539 "VHOST_DATA : " fmt, ##args) : \
542 #ifdef RTE_LIBRTE_VHOST_DEBUG
543 #define VHOST_MAX_PRINT_BUFF 6072
544 #define PRINT_PACKET(device, addr, size, header) do { \
545 char *pkt_addr = (char *)(addr); \
546 unsigned int index; \
547 char packet[VHOST_MAX_PRINT_BUFF]; \
550 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Header size %d: ", (device->vid), (size)); \
552 snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%d) Packet size %d: ", (device->vid), (size)); \
553 for (index = 0; index < (size); index++) { \
554 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \
555 "%02hhx ", pkt_addr[index]); \
557 snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \
559 VHOST_LOG_DATA(DEBUG, "%s", packet); \
562 #define PRINT_PACKET(device, addr, size, header) do {} while (0)
565 #define MAX_VHOST_DEVICE 1024
566 extern struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
568 #define VHOST_BINARY_SEARCH_THRESH 256
570 static __rte_always_inline int guest_page_addrcmp(const void *p1,
573 const struct guest_page *page1 = (const struct guest_page *)p1;
574 const struct guest_page *page2 = (const struct guest_page *)p2;
576 if (page1->guest_phys_addr > page2->guest_phys_addr)
578 if (page1->guest_phys_addr < page2->guest_phys_addr)
584 /* Convert guest physical address to host physical address */
585 static __rte_always_inline rte_iova_t
586 gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
589 struct guest_page *page;
590 struct guest_page key;
592 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
593 key.guest_phys_addr = gpa;
594 page = bsearch(&key, dev->guest_pages, dev->nr_guest_pages,
595 sizeof(struct guest_page), guest_page_addrcmp);
597 if (gpa + size < page->guest_phys_addr + page->size)
598 return gpa - page->guest_phys_addr +
599 page->host_phys_addr;
602 for (i = 0; i < dev->nr_guest_pages; i++) {
603 page = &dev->guest_pages[i];
605 if (gpa >= page->guest_phys_addr &&
606 gpa + size < page->guest_phys_addr +
608 return gpa - page->guest_phys_addr +
609 page->host_phys_addr;
616 static __rte_always_inline uint64_t
617 hva_to_gpa(struct virtio_net *dev, uint64_t vva, uint64_t len)
619 struct rte_vhost_mem_region *r;
622 if (unlikely(!dev || !dev->mem))
625 for (i = 0; i < dev->mem->nregions; i++) {
626 r = &dev->mem->regions[i];
628 if (vva >= r->host_user_addr &&
629 vva + len < r->host_user_addr + r->size) {
630 return r->guest_phys_addr + vva - r->host_user_addr;
636 static __rte_always_inline struct virtio_net *
639 struct virtio_net *dev = vhost_devices[vid];
641 if (unlikely(!dev)) {
642 VHOST_LOG_CONFIG(ERR,
643 "(%d) device not found.\n", vid);
649 int vhost_new_device(void);
650 void cleanup_device(struct virtio_net *dev, int destroy);
651 void reset_device(struct virtio_net *dev);
652 void vhost_destroy_device(int);
653 void vhost_destroy_device_notify(struct virtio_net *dev);
655 void cleanup_vq(struct vhost_virtqueue *vq, int destroy);
656 void cleanup_vq_inflight(struct virtio_net *dev, struct vhost_virtqueue *vq);
657 void free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq);
659 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
661 void vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *dev);
663 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
664 void vhost_enable_dequeue_zero_copy(int vid);
665 void vhost_set_builtin_virtio_net(int vid, bool enable);
666 void vhost_enable_extbuf(int vid);
667 void vhost_enable_linearbuf(int vid);
669 struct vhost_device_ops const *vhost_driver_callback_get(const char *path);
672 * Backend-specific cleanup.
674 * TODO: fix it; we have one backend now
676 void vhost_backend_cleanup(struct virtio_net *dev);
678 uint64_t __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
679 uint64_t iova, uint64_t *len, uint8_t perm);
680 void *vhost_alloc_copy_ind_table(struct virtio_net *dev,
681 struct vhost_virtqueue *vq,
682 uint64_t desc_addr, uint64_t desc_len);
683 int vring_translate(struct virtio_net *dev, struct vhost_virtqueue *vq);
684 uint64_t translate_log_addr(struct virtio_net *dev, struct vhost_virtqueue *vq,
686 void vring_invalidate(struct virtio_net *dev, struct vhost_virtqueue *vq);
688 static __rte_always_inline uint64_t
689 vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
690 uint64_t iova, uint64_t *len, uint8_t perm)
692 if (!(dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
693 return rte_vhost_va_from_guest_pa(dev->mem, iova, len);
695 return __vhost_iova_to_vva(dev, vq, iova, len, perm);
698 #define vhost_avail_event(vr) \
699 (*(volatile uint16_t*)&(vr)->used->ring[(vr)->size])
700 #define vhost_used_event(vr) \
701 (*(volatile uint16_t*)&(vr)->avail->ring[(vr)->size])
704 * The following is used with VIRTIO_RING_F_EVENT_IDX.
705 * Assuming a given event_idx value from the other size, if we have
706 * just incremented index from old to new_idx, should we trigger an
709 static __rte_always_inline int
710 vhost_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old)
712 return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old);
715 static __rte_always_inline void
716 vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
718 /* Flush used->idx update before we read avail->flags. */
721 /* Don't kick guest if we don't reach index specified by guest. */
722 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) {
723 uint16_t old = vq->signalled_used;
724 uint16_t new = vq->async_pkts_inflight_n ?
725 vq->used->idx:vq->last_used_idx;
726 bool signalled_used_valid = vq->signalled_used_valid;
728 vq->signalled_used = new;
729 vq->signalled_used_valid = true;
731 VHOST_LOG_DATA(DEBUG, "%s: used_event_idx=%d, old=%d, new=%d\n",
733 vhost_used_event(vq),
736 if ((vhost_need_event(vhost_used_event(vq), new, old) &&
737 (vq->callfd >= 0)) ||
738 unlikely(!signalled_used_valid)) {
739 eventfd_write(vq->callfd, (eventfd_t) 1);
740 if (dev->notify_ops->guest_notified)
741 dev->notify_ops->guest_notified(dev->vid);
744 /* Kick the guest if necessary. */
745 if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)
746 && (vq->callfd >= 0)) {
747 eventfd_write(vq->callfd, (eventfd_t)1);
748 if (dev->notify_ops->guest_notified)
749 dev->notify_ops->guest_notified(dev->vid);
754 static __rte_always_inline void
755 vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
757 uint16_t old, new, off, off_wrap;
758 bool signalled_used_valid, kick = false;
760 /* Flush used desc update. */
763 if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) {
764 if (vq->driver_event->flags !=
765 VRING_EVENT_F_DISABLE)
770 old = vq->signalled_used;
771 new = vq->last_used_idx;
772 vq->signalled_used = new;
773 signalled_used_valid = vq->signalled_used_valid;
774 vq->signalled_used_valid = true;
776 if (vq->driver_event->flags != VRING_EVENT_F_DESC) {
777 if (vq->driver_event->flags != VRING_EVENT_F_DISABLE)
782 if (unlikely(!signalled_used_valid)) {
789 off_wrap = vq->driver_event->off_wrap;
790 off = off_wrap & ~(1 << 15);
795 if (vq->used_wrap_counter != off_wrap >> 15)
798 if (vhost_need_event(off, new, old))
802 eventfd_write(vq->callfd, (eventfd_t)1);
803 if (dev->notify_ops->guest_notified)
804 dev->notify_ops->guest_notified(dev->vid);
808 static __rte_always_inline void
809 free_ind_table(void *idesc)
814 static __rte_always_inline void
815 restore_mbuf(struct rte_mbuf *m)
817 uint32_t mbuf_size, priv_size;
820 priv_size = rte_pktmbuf_priv_size(m->pool);
821 mbuf_size = sizeof(struct rte_mbuf) + priv_size;
822 /* start of buffer is after mbuf structure and priv data */
824 m->buf_addr = (char *)m + mbuf_size;
825 m->buf_iova = rte_mempool_virt2iova(m) + mbuf_size;
830 static __rte_always_inline bool
831 mbuf_is_consumed(struct rte_mbuf *m)
834 if (rte_mbuf_refcnt_read(m) > 1)
842 static __rte_always_inline void
843 put_zmbuf(struct zcopy_mbuf *zmbuf)
848 #endif /* _VHOST_NET_CDEV_H_ */