X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fvhost.h;h=658f6fc287e27a525d73d862b9b4bec1aae5a974;hb=1b7b24389cee5baa421d334048782e3e99e7dec5;hp=df98d15de679b4a6bca625363a6860c21427dffa;hpb=faa9867c4da2faa77141082cab82f458033f2b79;p=dpdk.git

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index df98d15de6..658f6fc287 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -22,6 +22,9 @@
 
 #include "rte_vhost.h"
 #include "rte_vdpa.h"
+#include "rte_vdpa_dev.h"
+
+#include "rte_vhost_async.h"
 
 /* Used to indicate that the device is running on a data core */
 #define VIRTIO_DEV_RUNNING 1
@@ -31,6 +34,8 @@
 #define VIRTIO_DEV_BUILTIN_VIRTIO_NET 4
 /* Used to indicate that the device has its own data path and configured */
 #define VIRTIO_DEV_VDPA_CONFIGURED 8
+/* Used to indicate that the feature negotiation failed */
+#define VIRTIO_DEV_FEATURES_FAILED 16
 
 /* Backend value set by guest. */
 #define VIRTIO_DEV_STOPPED -1
@@ -39,6 +44,11 @@
 
 #define VHOST_LOG_CACHE_NR 32
 
+#define MAX_PKT_BURST 32
+
+#define VHOST_MAX_ASYNC_IT (MAX_PKT_BURST * 2)
+#define VHOST_MAX_ASYNC_VEC (BUF_VECTOR_MAX * 4)
+
 #define PACKED_DESC_ENQUEUE_USED_FLAG(w)	\
 	((w) ? (VRING_DESC_F_AVAIL | VRING_DESC_F_USED | VRING_DESC_F_WRITE) : \
 		VRING_DESC_F_WRITE)
@@ -82,20 +92,6 @@ struct buf_vector {
 	uint32_t desc_idx;
 };
 
-/*
- * A structure to hold some fields needed in zero copy code path,
- * mainly for associating an mbuf with the right desc_idx.
- */
-struct zcopy_mbuf {
-	struct rte_mbuf *mbuf;
-	uint32_t desc_idx;
-	uint16_t desc_count;
-	uint16_t in_use;
-
-	TAILQ_ENTRY(zcopy_mbuf) next;
-};
-TAILQ_HEAD(zcopy_mbuf_list, zcopy_mbuf);
-
 /*
  * Structure contains the info for each batched memory copy.
  */
@@ -151,6 +147,10 @@ struct vhost_virtqueue {
 	int			backend;
 	int			enabled;
 	int			access_ok;
+	int			ready;
+	int			notif_enable;
+#define VIRTIO_UNINITIALIZED_NOTIF	(-1)
+
 	rte_spinlock_t		access_lock;
 
 	/* Used to notify the guest (trigger interrupt) */
@@ -169,12 +169,6 @@ struct vhost_virtqueue {
 	struct rte_vhost_resubmit_info *resubmit_inflight;
 	uint64_t		global_counter;
 
-	uint16_t		nr_zmbuf;
-	uint16_t		zmbuf_size;
-	uint16_t		last_zmbuf_idx;
-	struct zcopy_mbuf	*zmbufs;
-	struct zcopy_mbuf_list	zmbuf_list;
-
 	union {
 		struct vring_used_elem  *shadow_used_split;
 		struct vring_used_elem_packed *shadow_used_packed;
@@ -200,28 +194,40 @@ struct vhost_virtqueue {
 	TAILQ_HEAD(, vhost_iotlb_entry) iotlb_list;
 	int				iotlb_cache_nr;
 	TAILQ_HEAD(, vhost_iotlb_entry) iotlb_pending_list;
+
+	/* operation callbacks for async dma */
+	struct rte_vhost_async_channel_ops	async_ops;
+
+	struct rte_vhost_iov_iter *it_pool;
+	struct iovec *vec_pool;
+
+	/* async data transfer status */
+	struct async_inflight_info *async_pkts_info;
+	uint16_t	async_pkts_idx;
+	uint16_t	async_pkts_inflight_n;
+	uint16_t	async_last_pkts_n;
+	struct vring_used_elem  *async_descs_split;
+	uint16_t async_desc_idx;
+	uint16_t last_async_desc_idx;
+
+	/* vq async features */
+	bool		async_inorder;
+	bool		async_registered;
+	uint16_t	async_threshold;
 } __rte_cache_aligned;
 
-/* Old kernels have no such macros defined */
-#ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
- #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
-#endif
-
-#ifndef VIRTIO_NET_F_MQ
- #define VIRTIO_NET_F_MQ		22
-#endif
+/* Virtio device status as per Virtio specification */
+#define VIRTIO_DEVICE_STATUS_RESET		0x00
+#define VIRTIO_DEVICE_STATUS_ACK		0x01
+#define VIRTIO_DEVICE_STATUS_DRIVER		0x02
+#define VIRTIO_DEVICE_STATUS_DRIVER_OK		0x04
+#define VIRTIO_DEVICE_STATUS_FEATURES_OK	0x08
+#define VIRTIO_DEVICE_STATUS_DEV_NEED_RESET	0x40
+#define VIRTIO_DEVICE_STATUS_FAILED		0x80
 
 #define VHOST_MAX_VRING			0x100
 #define VHOST_MAX_QUEUE_PAIRS		0x80
 
-#ifndef VIRTIO_NET_F_MTU
- #define VIRTIO_NET_F_MTU 3
-#endif
-
-#ifndef VIRTIO_F_ANY_LAYOUT
- #define VIRTIO_F_ANY_LAYOUT		27
-#endif
-
 /* Declare IOMMU related bits for older kernels */
 #ifndef VIRTIO_F_IOMMU_PLATFORM
 
@@ -352,7 +358,7 @@ struct virtio_net {
 	/* to tell if we need broadcast rarp packet */
 	int16_t			broadcast_rarp;
 	uint32_t		nr_vring;
-	int			dequeue_zero_copy;
+	int			async_copy;
 	int			extbuf;
 	int			linearbuf;
 	struct vhost_virtqueue	*virtqueue[VHOST_MAX_QUEUE_PAIRS * 2];
@@ -364,6 +370,7 @@ struct virtio_net {
 	uint64_t		log_addr;
 	struct rte_ether_addr	mac;
 	uint16_t		mtu;
+	uint8_t			status;
 
 	struct vhost_device_ops const *notify_ops;
 
@@ -377,11 +384,7 @@ struct virtio_net {
 	int			postcopy_ufd;
 	int			postcopy_listening;
 
-	/*
-	 * Device id to identify a specific backend device.
-	 * It's set to -1 for the default software implementation.
-	 */
-	int			vdpa_dev_id;
+	struct rte_vdpa_device *vdpa_dev;
 
 	/* context data for the external message handlers */
 	void			*extern_data;
@@ -562,38 +565,67 @@ static __rte_always_inline int guest_page_addrcmp(const void *p1,
 	return 0;
 }
 
-/* Convert guest physical address to host physical address */
 static __rte_always_inline rte_iova_t
-gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
+gpa_to_first_hpa(struct virtio_net *dev, uint64_t gpa,
+	uint64_t gpa_size, uint64_t *hpa_size)
 {
 	uint32_t i;
 	struct guest_page *page;
 	struct guest_page key;
 
+	*hpa_size = gpa_size;
 	if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
-		key.guest_phys_addr = gpa;
+		key.guest_phys_addr = gpa & ~(dev->guest_pages[0].size - 1);
 		page = bsearch(&key, dev->guest_pages, dev->nr_guest_pages,
 			       sizeof(struct guest_page), guest_page_addrcmp);
 		if (page) {
-			if (gpa + size < page->guest_phys_addr + page->size)
+			if (gpa + gpa_size <=
+					page->guest_phys_addr + page->size) {
+				return gpa - page->guest_phys_addr +
+					page->host_phys_addr;
+			} else if (gpa < page->guest_phys_addr +
+						page->size) {
+				*hpa_size = page->guest_phys_addr +
+					page->size - gpa;
 				return gpa - page->guest_phys_addr +
 					page->host_phys_addr;
+			}
 		}
 	} else {
 		for (i = 0; i < dev->nr_guest_pages; i++) {
 			page = &dev->guest_pages[i];
 
-			if (gpa >= page->guest_phys_addr &&
-			    gpa + size < page->guest_phys_addr +
-			    page->size)
-				return gpa - page->guest_phys_addr +
-				       page->host_phys_addr;
+			if (gpa >= page->guest_phys_addr) {
+				if (gpa + gpa_size <=
+					page->guest_phys_addr + page->size) {
+					return gpa - page->guest_phys_addr +
+						page->host_phys_addr;
+				} else if (gpa < page->guest_phys_addr +
+							page->size) {
+					*hpa_size = page->guest_phys_addr +
+						page->size - gpa;
+					return gpa - page->guest_phys_addr +
+						page->host_phys_addr;
+				}
+			}
 		}
 	}
 
+	*hpa_size = 0;
 	return 0;
 }
 
+/* Convert guest physical address to host physical address */
+static __rte_always_inline rte_iova_t
+gpa_to_hpa(struct virtio_net *dev, uint64_t gpa, uint64_t size)
+{
+	rte_iova_t hpa;
+	uint64_t hpa_size;
+
+	hpa = gpa_to_first_hpa(dev, gpa, size, &hpa_size);
+	return hpa_size == size ? hpa : 0;
+}
+
 static __rte_always_inline uint64_t
 hva_to_gpa(struct virtio_net *dev, uint64_t vva, uint64_t len)
 {
@@ -639,13 +671,14 @@ void free_vq(struct virtio_net *dev, struct vhost_virtqueue *vq);
 
 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
 
-void vhost_attach_vdpa_device(int vid, int did);
+void vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *dev);
 
 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
-void vhost_enable_dequeue_zero_copy(int vid);
 void vhost_set_builtin_virtio_net(int vid, bool enable);
 void vhost_enable_extbuf(int vid);
 void vhost_enable_linearbuf(int vid);
+int vhost_enable_guest_notification(struct virtio_net *dev,
+		struct vhost_virtqueue *vq, int enable);
 
 struct vhost_device_ops const *vhost_driver_callback_get(const char *path);
 
@@ -697,7 +730,7 @@ static __rte_always_inline void
 vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
 {
 	/* Flush used->idx update before we read avail->flags. */
-	rte_smp_mb();
+	rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
 
 	/* Don't kick guest if we don't reach index specified by guest. */
 	if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) {
@@ -738,7 +771,7 @@ vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
 	bool signalled_used_valid, kick = false;
 
 	/* Flush used desc update. */
-	rte_smp_mb();
+	rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
 
 	if (!(dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))) {
 		if (vq->driver_event->flags !=
@@ -764,7 +797,7 @@ vhost_vring_call_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
 		goto kick;
 	}
 
-	rte_smp_rmb();
+	rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
 
 	off_wrap = vq->driver_event->off_wrap;
 	off = off_wrap & ~(1 << 15);
@@ -819,10 +852,4 @@ mbuf_is_consumed(struct rte_mbuf *m)
 	return true;
 }
 
-static __rte_always_inline void
-put_zmbuf(struct zcopy_mbuf *zmbuf)
-{
-	zmbuf->in_use = 0;
-}
-
 #endif /* _VHOST_NET_CDEV_H_ */