X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Frte_virtio_net.h;h=b9bf3205803cb9094aaf6b07ad8b84ec0547f251;hb=292959c71961acde0cda6e77e737bb0a4df1559c;hp=0c9c716b62bbd7aff81a9b95dd08d69e923ae58b;hpb=a4fff3bba82b79637a25622652481c973fdb3c9f;p=dpdk.git diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h index 0c9c716b62..b9bf320580 100644 --- a/lib/librte_vhost/rte_virtio_net.h +++ b/lib/librte_vhost/rte_virtio_net.h @@ -34,6 +34,25 @@ #ifndef _VIRTIO_NET_H_ #define _VIRTIO_NET_H_ +/** + * @file + * Interface to vhost net + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +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 @@ -46,83 +65,88 @@ 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; + uint64_t buf_addr; + uint32_t buf_len; + uint32_t desc_idx; }; -/* - * Structure contains variables relevant to TX/RX virtqueues. +/** + * 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. */ - eventfd_t callfd; /* Currently unused as polling mode is enabled. */ - eventfd_t kickfd; /* Used to notify the guest (trigger interrupt). */ - /* Used for scatter RX. */ - struct buf_vector buf_vec[BUF_VECTOR_MAX]; +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. */ + eventfd_t callfd; /**< Used to notify the guest (trigger interrupt). */ + eventfd_t kickfd; /**< Currently unused as polling mode is enabled. */ + struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for scatter RX. */ } __rte_cache_aligned; -/* +/** * Device structure contains all configuration information relating to the device. */ -struct virtio_net -{ - struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /* Contains all virtqueue information. */ - struct virtio_memory *mem; /* QEMU memory and memory region information. */ - uint64_t features; /* Negotiated feature set. */ - uint64_t device_fh; /* device identifier. */ - uint32_t flags; /* Device flags. Only used to check if device is running on data core. */ +struct virtio_net { + struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /**< Contains all virtqueue information. */ + struct virtio_memory *mem; /**< QEMU memory and memory region information. */ + uint64_t features; /**< Negotiated 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. */ + void *priv; /**< private context */ } __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. */ + 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. */ - /* Memory region information. */ - struct virtio_memory_regions regions[0]; + 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 operations to add/remove device. + * + * Make sure to set VIRTIO_DEV_RUNNING to the device flags in new_device and + * remove it in destroy_device. + * */ struct virtio_net_device_ops { - int (* new_device) (struct virtio_net *); /* Add device. */ - void (* destroy_device) (volatile struct virtio_net *); /* Remove device. */ + int (*new_device)(struct virtio_net *); /**< Add device. */ + void (*destroy_device)(volatile struct virtio_net *); /**< Remove device. */ }; -int init_virtio_net(struct virtio_net_device_ops const * const); -int deinit_virtio_net(void); - -struct vhost_net_device_ops const * get_virtio_net_callbacks(void); +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]; + return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx_res; +} /** * Function to convert guest physical addresses to vhost virtual addresses. @@ -146,9 +170,29 @@ gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa) return vhost_va; } +/** + * Disable features in feature_mask. Returns 0 on success. + */ +int rte_vhost_feature_disable(uint64_t feature_mask); + +/** + * Enable features in feature_mask. Returns 0 on success. + */ +int rte_vhost_feature_enable(uint64_t feature_mask); + +/* 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); + /* Register vhost driver. dev_name could be different for multiple instance support. */ int rte_vhost_driver_register(const char *dev_name); +/* Unregister vhost driver. This is only meaningful to vhost user. */ +int rte_vhost_driver_unregister(const char *dev_name); + +/* 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); @@ -157,8 +201,14 @@ int rte_vhost_driver_session_start(void); * 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 queue_id * virtio queue index in mq case + * @param pkts + * array to contain packets to be enqueued + * @param count + * packets num to be enqueued * @return * num of packets enqueued */ @@ -169,10 +219,16 @@ uint16_t rte_vhost_enqueue_burst(struct virtio_net *dev, uint16_t queue_id, * 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 + * virtio-net device + * @param queue_id + * virtio queue index in mq case * @param mbuf_pool * mbuf_pool where host mbuf is allocated. - * @param queue_id - * virtio queue index in mq case. + * @param pkts + * array to contain packets to be dequeued + * @param count + * packets num to be dequeued * @return * num of packets dequeued */