#include <rte_mempool.h>
#include <rte_ether.h>
-struct rte_mbuf;
-
-#define VHOST_MEMORY_MAX_NREGIONS 8
-
-/* Used to indicate that the device is running on a data core */
-#define VIRTIO_DEV_RUNNING 1
-
-/* Backend value set by guest. */
-#define VIRTIO_DEV_STOPPED -1
-
+#define RTE_VHOST_USER_CLIENT (1ULL << 0)
+#define RTE_VHOST_USER_NO_RECONNECT (1ULL << 1)
/* Enum for virtqueue management. */
enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
-#define BUF_VECTOR_MAX 256
-
-/**
- * Structure contains buffer address, length and descriptor index
- * from vring to do scatter RX.
- */
-struct buf_vector {
- uint64_t buf_addr;
- uint32_t buf_len;
- uint32_t desc_idx;
-};
-
-/**
- * Structure contains variables relevant to RX/TX virtqueues.
- */
-struct vhost_virtqueue {
- struct vring_desc *desc; /**< Virtqueue descriptor ring. */
- struct vring_avail *avail; /**< Virtqueue available ring. */
- struct vring_used *used; /**< Virtqueue used ring. */
- uint32_t size; /**< Size of descriptor ring. */
- uint32_t backend; /**< Backend value to determine if device should started/stopped. */
- uint16_t vhost_hlen; /**< Vhost header length (varies depending on RX merge buffers. */
- volatile uint16_t last_used_idx; /**< Last index used on the available ring */
- volatile uint16_t last_used_idx_res; /**< Used for multiple devices reserving buffers. */
-#define VIRTIO_INVALID_EVENTFD (-1)
-#define VIRTIO_UNINITIALIZED_EVENTFD (-2)
- int callfd; /**< Used to notify the guest (trigger interrupt). */
- int kickfd; /**< Currently unused as polling mode is enabled. */
- int enabled;
- uint64_t log_guest_addr; /**< Physical address of used ring, for logging */
- uint64_t reserved[15]; /**< Reserve some spaces for future extension. */
- struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for scatter RX. */
-} __rte_cache_aligned;
-
-/* Old kernels have no such macro defined */
-#ifndef VIRTIO_NET_F_GUEST_ANNOUNCE
- #define VIRTIO_NET_F_GUEST_ANNOUNCE 21
-#endif
-
-
-/*
- * Make an extra wrapper for VIRTIO_NET_F_MQ and
- * VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX as they are
- * introduced since kernel v3.8. This makes our
- * code buildable for older kernel.
- */
-#ifdef VIRTIO_NET_F_MQ
- #define VHOST_MAX_QUEUE_PAIRS VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX
- #define VHOST_SUPPORTS_MQ (1ULL << VIRTIO_NET_F_MQ)
-#else
- #define VHOST_MAX_QUEUE_PAIRS 1
- #define VHOST_SUPPORTS_MQ 0
-#endif
-
-/*
- * Define virtio 1.0 for older kernels
- */
-#ifndef VIRTIO_F_VERSION_1
- #define VIRTIO_F_VERSION_1 32
-#endif
-
-/**
- * Device structure contains all configuration information relating to the device.
- */
-struct virtio_net {
- struct virtio_memory *mem; /**< QEMU memory and memory region information. */
- uint64_t features; /**< Negotiated feature set. */
- uint64_t protocol_features; /**< Negotiated protocol feature set. */
- uint64_t device_fh; /**< device identifier. */
- uint32_t flags; /**< Device flags. Only used to check if device is running on data core. */
-#define IF_NAME_SZ (PATH_MAX > IFNAMSIZ ? PATH_MAX : IFNAMSIZ)
- char ifname[IF_NAME_SZ]; /**< Name of the tap device or socket path. */
- uint32_t virt_qp_nb; /**< number of queue pair we have allocated */
- void *priv; /**< private context */
- uint64_t log_size; /**< Size of log area */
- uint64_t log_base; /**< Where dirty pages are logged */
- struct ether_addr mac; /**< MAC address */
- rte_atomic16_t broadcast_rarp; /**< A flag to tell if we need broadcast rarp packet */
- uint64_t reserved[61]; /**< Reserve some spaces for future extension. */
- struct vhost_virtqueue *virtqueue[VHOST_MAX_QUEUE_PAIRS * 2]; /**< Contains all virtqueue information. */
-} __rte_cache_aligned;
-
-/**
- * Information relating to memory regions including offsets to addresses in QEMUs memory file.
- */
-struct virtio_memory_regions {
- uint64_t guest_phys_address; /**< Base guest physical address of region. */
- uint64_t guest_phys_address_end; /**< End guest physical address of region. */
- uint64_t memory_size; /**< Size of region. */
- uint64_t userspace_address; /**< Base userspace address of region. */
- uint64_t address_offset; /**< Offset of region for address translation. */
-};
-
-
-/**
- * Memory structure includes region and mapping information.
- */
-struct virtio_memory {
- uint64_t base_address; /**< Base QEMU userspace address of the memory file. */
- uint64_t mapped_address; /**< Mapped address of memory file base in our applications memory space. */
- uint64_t mapped_size; /**< Total size of memory file. */
- uint32_t nregions; /**< Number of memory regions. */
- struct virtio_memory_regions regions[0]; /**< Memory region information. */
-};
-
/**
* Device and vring operations.
*
*
*/
struct virtio_net_device_ops {
- int (*new_device)(struct virtio_net *); /**< Add device. */
- void (*destroy_device)(volatile struct virtio_net *); /**< Remove device. */
-
- int (*vring_state_changed)(struct virtio_net *dev, uint16_t queue_id, int enable); /**< triggered when a vring is enabled or disabled */
-};
-
-static inline uint16_t __attribute__((always_inline))
-rte_vring_available_entries(struct virtio_net *dev, uint16_t queue_id)
-{
- struct vhost_virtqueue *vq = dev->virtqueue[queue_id];
-
- if (!vq->enabled)
- return 0;
+ int (*new_device)(int vid); /**< Add device. */
+ void (*destroy_device)(int vid); /**< Remove device. */
- return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx_res;
-}
-
-/**
- * Function to convert guest physical addresses to vhost virtual addresses.
- * This is used to convert guest virtio buffer addresses.
- */
-static inline uint64_t __attribute__((always_inline))
-gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa)
-{
- struct virtio_memory_regions *region;
- uint32_t regionidx;
- uint64_t vhost_va = 0;
-
- for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- region = &dev->mem->regions[regionidx];
- if ((guest_pa >= region->guest_phys_address) &&
- (guest_pa <= region->guest_phys_address_end)) {
- vhost_va = region->address_offset + guest_pa;
- break;
- }
- }
- return vhost_va;
-}
+ int (*vring_state_changed)(int vid, uint16_t queue_id, int enable); /**< triggered when a vring is enabled or disabled */
+ void *reserved[5]; /**< Reserved for future extension */
+};
/**
* Disable features in feature_mask. Returns 0 on success.
/* Returns currently supported vhost features */
uint64_t rte_vhost_feature_get(void);
-int rte_vhost_enable_guest_notification(struct virtio_net *dev, uint16_t queue_id, int enable);
+int rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable);
-/* Register vhost driver. dev_name could be different for multiple instance support. */
-int rte_vhost_driver_register(const char *dev_name);
+/**
+ * Register vhost driver. path could be different for multiple
+ * instance support.
+ */
+int rte_vhost_driver_register(const char *path, uint64_t flags);
/* Unregister vhost driver. This is only meaningful to vhost user. */
-int rte_vhost_driver_unregister(const char *dev_name);
+int rte_vhost_driver_unregister(const char *path);
/* Register callbacks. */
int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const);
/* Start vhost driver session blocking loop. */
int rte_vhost_driver_session_start(void);
+/**
+ * Get the numa node from which the virtio net device's memory
+ * is allocated.
+ *
+ * @param vid
+ * virtio-net device ID
+ *
+ * @return
+ * The numa node, -1 on failure
+ */
+int rte_vhost_get_numa_node(int vid);
+
+/**
+ * Get the number of queues the device supports.
+ *
+ * @param vid
+ * virtio-net device ID
+ *
+ * @return
+ * The number of queues, 0 on failure
+ */
+uint32_t rte_vhost_get_queue_num(int vid);
+
+/**
+ * Get the virtio net device's ifname. For vhost-cuse, ifname is the
+ * path of the char device. For vhost-user, ifname is the vhost-user
+ * socket file path.
+ *
+ * @param vid
+ * virtio-net device ID
+ * @param buf
+ * The buffer to stored the queried ifname
+ * @param len
+ * The length of buf
+ *
+ * @return
+ * 0 on success, -1 on failure
+ */
+int rte_vhost_get_ifname(int vid, char *buf, size_t len);
+
+/**
+ * Get how many avail entries are left in the queue
+ *
+ * @param vid
+ * virtio-net device ID
+ * @param queue_id
+ * virtio queue index
+ *
+ * @return
+ * num of avail entires left
+ */
+uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
+
/**
* This function adds buffers to the virtio devices RX virtqueue. Buffers can
* be received from the physical port or from another virtual device. A packet
* count is returned to indicate the number of packets that were succesfully
* added to the RX queue.
- * @param dev
- * virtio-net device
+ * @param vid
+ * virtio-net device ID
* @param queue_id
* virtio queue index in mq case
* @param pkts
* @return
* num of packets enqueued
*/
-uint16_t rte_vhost_enqueue_burst(struct virtio_net *dev, uint16_t queue_id,
+uint16_t rte_vhost_enqueue_burst(int vid, uint16_t queue_id,
struct rte_mbuf **pkts, uint16_t count);
/**
* This function gets guest buffers from the virtio device TX virtqueue,
* construct host mbufs, copies guest buffer content to host mbufs and
* store them in pkts to be processed.
- * @param dev
+ * @param vid
* virtio-net device
* @param queue_id
* virtio queue index in mq case
* @return
* num of packets dequeued
*/
-uint16_t rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
+uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count);
#endif /* _VIRTIO_NET_H_ */
Code Review / deb_dpdk.git / blobdiff