Differential D27856 Diff 81516 sys/dev/virtio/virtqueue.c

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sys/dev/virtio/virtqueue.c

Show First 20 Lines • Show All 58 Lines • ▼ Show 20 Lines	struct virtqueue {
device_t vq_dev;		device_t vq_dev;
char vq_name[VIRTQUEUE_MAX_NAME_SZ];		char vq_name[VIRTQUEUE_MAX_NAME_SZ];
uint16_t vq_queue_index;		uint16_t vq_queue_index;
uint16_t vq_nentries;		uint16_t vq_nentries;
uint32_t vq_flags;		uint32_t vq_flags;
#define VIRTQUEUE_FLAG_INDIRECT 0x0001		#define VIRTQUEUE_FLAG_INDIRECT 0x0001
#define VIRTQUEUE_FLAG_EVENT_IDX 0x0002		#define VIRTQUEUE_FLAG_EVENT_IDX 0x0002

		bus_size_t vq_notify_offset;
int vq_alignment;		int vq_alignment;
int vq_ring_size;		int vq_ring_size;
void *vq_ring_mem;		void *vq_ring_mem;
int vq_max_indirect_size;		int vq_max_indirect_size;
int vq_indirect_mem_size;		int vq_indirect_mem_size;
virtqueue_intr_t *vq_intrhand;		virtqueue_intr_t *vq_intrhand;
void *vq_intrhand_arg;		void *vq_intrhand_arg;

▲ Show 20 Lines • Show All 67 Lines • ▼ Show 20 Lines	virtqueue_filter_features(uint64_t features)
mask = (1 << VIRTIO_TRANSPORT_F_START) - 1;		mask = (1 << VIRTIO_TRANSPORT_F_START) - 1;
mask \|= VIRTIO_RING_F_INDIRECT_DESC;		mask \|= VIRTIO_RING_F_INDIRECT_DESC;
mask \|= VIRTIO_RING_F_EVENT_IDX;		mask \|= VIRTIO_RING_F_EVENT_IDX;

return (features & mask);		return (features & mask);
}		}

int		int
virtqueue_alloc(device_t dev, uint16_t queue, uint16_t size, int align,		virtqueue_alloc(device_t dev, uint16_t queue, uint16_t size,
vm_paddr_t highaddr, struct vq_alloc_info info, struct virtqueue *vqp)		bus_size_t notify_offset, int align, vm_paddr_t highaddr,
		struct vq_alloc_info info, struct virtqueue *vqp)
{		{
struct virtqueue *vq;		struct virtqueue *vq;
int error;		int error;

*vqp = NULL;		*vqp = NULL;
error = 0;		error = 0;

if (size == 0) {		if (size == 0) {
Show All 19 Lines	virtqueue_alloc(device_t dev, uint16_t queue, uint16_t size,
if (vq == NULL) {		if (vq == NULL) {
device_printf(dev, "cannot allocate virtqueue\n");		device_printf(dev, "cannot allocate virtqueue\n");
return (ENOMEM);		return (ENOMEM);
}		}

vq->vq_dev = dev;		vq->vq_dev = dev;
strlcpy(vq->vq_name, info->vqai_name, sizeof(vq->vq_name));		strlcpy(vq->vq_name, info->vqai_name, sizeof(vq->vq_name));
vq->vq_queue_index = queue;		vq->vq_queue_index = queue;
		vq->vq_notify_offset = notify_offset;
vq->vq_alignment = align;		vq->vq_alignment = align;
vq->vq_nentries = size;		vq->vq_nentries = size;
vq->vq_free_cnt = size;		vq->vq_free_cnt = size;
vq->vq_intrhand = info->vqai_intr;		vq->vq_intrhand = info->vqai_intr;
vq->vq_intrhand_arg = info->vqai_intr_arg;		vq->vq_intrhand_arg = info->vqai_intr_arg;

if (VIRTIO_BUS_WITH_FEATURE(dev, VIRTIO_RING_F_EVENT_IDX) != 0)		if (VIRTIO_BUS_WITH_FEATURE(dev, VIRTIO_RING_F_EVENT_IDX) != 0)
vq->vq_flags \|= VIRTQUEUE_FLAG_EVENT_IDX;		vq->vq_flags \|= VIRTQUEUE_FLAG_EVENT_IDX;
▲ Show 20 Lines • Show All 620 Lines • ▼ Show 20 Lines	vq_ring_must_notify_host(struct virtqueue *vq)

return ((vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY) == 0);		return ((vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY) == 0);
}		}

static void		static void
vq_ring_notify_host(struct virtqueue *vq)		vq_ring_notify_host(struct virtqueue *vq)
{		{

VIRTIO_BUS_NOTIFY_VQ(vq->vq_dev, vq->vq_queue_index);		VIRTIO_BUS_NOTIFY_VQ(vq->vq_dev, vq->vq_queue_index,
		vq->vq_notify_offset);
}		}

static void		static void
vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)		vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
{		{
struct vring_desc *dp;		struct vring_desc *dp;
struct vq_desc_extra *dxp;		struct vq_desc_extra *dxp;

Show All 29 Lines