lib/virtio/virtqueue.c

16 #include <virtio/virtqueue.h>
46 struct virtqueue
98  * \param vq        virtqueue to enable the interrupts
104 static bool virtqueue_interrupt_enable(struct virtqueue *vq,
124  * \brief initializes the vring structure of the virtqueue
126  * \param vq virtqueue of the vring to initialize
128 static void virtqueue_init_vring(struct virtqueue *vq)
157  * \param vq the virtqueue to initialize the indirect descriptors
162 static errval_t virtqueue_init_indirect(struct virtqueue *vq,
180 static bool virtqueue_should_notify_host(struct virtqueue *vq)
207  * \brief allocates and initiates a new virtqueue structure
210  * \param vq     pointer where to store the new virtqueue pointer
215                                 struct virtqueue **vq)
266  * \brief allocates and initiates a new virtqueue structure
270  * \param vq        pointer where to store the new virtqueue pointer
276                                           struct virtqueue **ret_vq)
328     struct virtqueue *vq;
331                 sizeof(struct virtqueue) + (setup->vring_ndesc
397  * \param vq pointer to the virtqueue memory to be freed
401 errval_t virtio_virtqueue_free(struct virtqueue *vq)
416  * \param vq pointer to the virtqueue structure
420 lpaddr_t virtio_virtqueue_get_vring_paddr(struct virtqueue *vq)
428  * \param the virtqueue to get the alignment from
432 lvaddr_t virtio_virtqueue_get_vring_align(struct virtqueue *vq)
440  * \param vq        pointer to the virtqueue structure
443 void virtio_virtqueue_get_vring_cap(struct virtqueue *vq,
455  * \param vq the virtqueue
460 uint8_t virtio_virtqueue_has_buffers(struct virtqueue *vq)
471  * \param vq the virtqueue
476 lvaddr_t virtio_virtqueue_buffer_vbase(struct virtqueue *vq)
489  *        this virtqueue
491  * \param vq pointer to the virtqueue structure
495 uint16_t virtio_virtqueue_get_num_desc(struct virtqueue *vq)
501  * \brief Returns the queue index of the virtqueue of the device
503  * \param vq pointer to the virtqueue structure
507 uint16_t virtio_virtqueue_get_queue_index(struct virtqueue *vq)
513  * \brief Checks if the virtqueue is empty
515  * \param vq pointer to the virtqueue structure
520 bool virtio_virtqueue_is_empty(struct virtqueue *vq)
526  * \brief Checks if the virtqueue is full
528  * \param vq pointer to the virtqueue structure
533 bool virtio_virtqueue_is_full(struct virtqueue *vq)
541  * \param vq pointer to the virtqueue structure
545 uint16_t virtio_virtqueue_get_num_used(struct virtqueue *vq)
571 bool virtio_virtqueue_intr_filter(struct virtqueue *vq)
583  * \brief calls the interrupt handler for this virtqueue
585  * \param vq virtqueue to call the intr handler for
587 void virtio_virtqueue_intr_handle(struct virtqueue *vq)
599  * \param vq the virtqueue to enable the interrupts
604 bool virtio_virtqueue_intr_enable(struct virtqueue *vq)
612  * \param vq the virtqueue to enable the interrupts
618 bool virtio_virtqueue_intr_postpone(struct virtqueue *vq,
638  * \brief disables the interrupts for the given virtqueue
640  * \param vq        virtqueue to disable the interrupts
642 void virtio_virtqueue_intr_disable(struct virtqueue *vq)
655  * \param vq virtqueue to notify the host
657 void virtio_virtqueue_notify_host(struct virtqueue *vq)
805  * \brief updates the available ring of the virtqueue by placing the descriptor
808  * \param vq    the virtqueue to update
811 static void virtqueue_update_available(struct virtqueue *vq,
831  * \param vq        virtqueue to insert in
841 static errval_t virtqueue_enqueue_bufs(struct virtqueue *vq,
923  * \brief Enqueues a new descriptor chain into the virtqueue
925  * \param vq     the virtqueue the descriptor chain gets enqueued in
926  * \param bl     list of buffers to enqueue into the virtqueue
934 errval_t virtio_virtqueue_desc_enqueue(struct virtqueue *vq,
979 static errval_t virtqueue_free_desc_chain(struct virtqueue *vq,
1013  * \brief dequeues a descriptor chain form the virtqueue
1015  * \param vq     the virtqueue to dequeue descriptors from
1023 errval_t virtio_virtqueue_desc_dequeue(struct virtqueue *vq,
1081  * \brief polls the virtqueue
1083  * \param vq         the virtqueue to dequeue descriptors from
1091 errval_t virtio_virtqueue_poll(struct virtqueue *vq,
1119  * \brief returns a buffer allocator based on the buffers with the virtqueue
1122  * \param vq the virtqueue to get the buffer allocator
1128 errval_t virtio_virtqueue_get_buf_alloc(struct virtqueue *vq,