Displaying 20 results from an estimated 373 matches for "vring_desc_f_writ".
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vring_desc_f_write
2018 Dec 07
0
[RFC 3/3] virtio_ring: use new vring flags
...pu(vq->vq.vdev, desc->flags);
- if (flags & VRING_DESC_F_INDIRECT) {
+ if (flags & BIT(VRING_SPLIT_DESC_F_INDIRECT)) {
dma_unmap_single(vring_dma_dev(vq),
virtio64_to_cpu(vq->vq.vdev, desc->addr),
virtio32_to_cpu(vq->vq.vdev, desc->len),
- (flags & VRING_DESC_F_WRITE) ?
+ (flags & BIT(VRING_SPLIT_DESC_F_WRITE)) ?
DMA_FROM_DEVICE : DMA_TO_DEVICE);
} else {
dma_unmap_page(vring_dma_dev(vq),
virtio64_to_cpu(vq->vq.vdev, desc->addr),
virtio32_to_cpu(vq->vq.vdev, desc->len),
- (flags & VRING_DESC_F_W...
2018 Dec 07
7
[RFC 0/3] virtio_ring: define flags as shifts consistently
This is a follow up of the discussion in this thread:
https://patchwork.ozlabs.org/patch/1001015/#2042353
Tiwei Bie (3):
virtio_ring: define flags as shifts consistently
virtio_ring: add VIRTIO_RING_NO_LEGACY
virtio_ring: use new vring flags
drivers/virtio/virtio_ring.c | 100 ++++++++++++++++++-------------
include/uapi/linux/virtio_ring.h | 61 +++++++++++++------
2 files changed,
2018 Dec 07
7
[RFC 0/3] virtio_ring: define flags as shifts consistently
This is a follow up of the discussion in this thread:
https://patchwork.ozlabs.org/patch/1001015/#2042353
Tiwei Bie (3):
virtio_ring: define flags as shifts consistently
virtio_ring: add VIRTIO_RING_NO_LEGACY
virtio_ring: use new vring flags
drivers/virtio/virtio_ring.c | 100 ++++++++++++++++++-------------
include/uapi/linux/virtio_ring.h | 61 +++++++++++++------
2 files changed,
2018 Nov 08
0
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...if (!vring_use_dma_api(vq->vq.vdev))
> > + return;
> > +
> > + flags = state->flags;
> > +
> > + if (flags & VRING_DESC_F_INDIRECT) {
> > + dma_unmap_single(vring_dma_dev(vq),
> > + state->addr, state->len,
> > + (flags & VRING_DESC_F_WRITE) ?
> > + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> > + } else {
> > + dma_unmap_page(vring_dma_dev(vq),
> > + state->addr, state->len,
> > + (flags & VRING_DESC_F_WRITE) ?
> > + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> > + }...
2018 Jul 04
1
[PATCH net-next 6/8] virtio: introduce packed ring defines
...ice support Single Root I/O Virtualization?
> */
> diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h
> index 6d5d5fa..71c7a46 100644
> --- a/include/uapi/linux/virtio_ring.h
> +++ b/include/uapi/linux/virtio_ring.h
> @@ -43,6 +43,8 @@
> #define VRING_DESC_F_WRITE 2
> /* This means the buffer contains a list of buffer descriptors. */
> #define VRING_DESC_F_INDIRECT 4
> +#define VRING_DESC_F_AVAIL 7
It's better to use tab between VRING_DESC_F_AVAIL and 7.
> +#define VRING_DESC_F_USED 15
Maybe it's better to define VRING_DESC_F_A...
2018 Nov 07
2
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...> +{
> + u16 flags;
> +
> + if (!vring_use_dma_api(vq->vq.vdev))
> + return;
> +
> + flags = state->flags;
> +
> + if (flags & VRING_DESC_F_INDIRECT) {
> + dma_unmap_single(vring_dma_dev(vq),
> + state->addr, state->len,
> + (flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + } else {
> + dma_unmap_page(vring_dma_dev(vq),
> + state->addr, state->len,
> + (flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + }
> +}
> +
> +static void vr...
2018 Nov 07
2
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...> +{
> + u16 flags;
> +
> + if (!vring_use_dma_api(vq->vq.vdev))
> + return;
> +
> + flags = state->flags;
> +
> + if (flags & VRING_DESC_F_INDIRECT) {
> + dma_unmap_single(vring_dma_dev(vq),
> + state->addr, state->len,
> + (flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + } else {
> + dma_unmap_page(vring_dma_dev(vq),
> + state->addr, state->len,
> + (flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + }
> +}
> +
> +static void vr...
2014 Oct 22
1
[PATCH RFC 04/11] virtio_ring: implement endian reversal based on VERSION_1 feature.
...t; > + desc[i].next = cpu_to_virtio16(vq->vq.vdev,
> > + i+1);
> > i++;
> > }
> > }
> > for (; n < (out_sgs + in_sgs); n++) {
> > for (sg = sgs[n]; sg; sg = next(sg, &total_in)) {
> > - desc[i].flags = VRING_DESC_F_NEXT|VRING_DESC_F_WRITE;
> > - desc[i].addr = sg_phys(sg);
> > - desc[i].len = sg->length;
> > - desc[i].next = i+1;
> > + desc[i].flags = cpu_to_virtio16(vq->vq.vdev,
> > + VRING_DESC_F_NEXT|
> > + VRING_DESC_F_WRITE);
> > + desc[i].addr = cpu_to_...
2014 Oct 22
1
[PATCH RFC 04/11] virtio_ring: implement endian reversal based on VERSION_1 feature.
...t; > + desc[i].next = cpu_to_virtio16(vq->vq.vdev,
> > + i+1);
> > i++;
> > }
> > }
> > for (; n < (out_sgs + in_sgs); n++) {
> > for (sg = sgs[n]; sg; sg = next(sg, &total_in)) {
> > - desc[i].flags = VRING_DESC_F_NEXT|VRING_DESC_F_WRITE;
> > - desc[i].addr = sg_phys(sg);
> > - desc[i].len = sg->length;
> > - desc[i].next = i+1;
> > + desc[i].flags = cpu_to_virtio16(vq->vq.vdev,
> > + VRING_DESC_F_NEXT|
> > + VRING_DESC_F_WRITE);
> > + desc[i].addr = cpu_to_...
2014 Nov 24
2
[PATCH v3 26/41] vhost: virtio 1.0 endian-ness support
...e - iov_count);
if (unlikely(ret < 0)) {
vq_err(vq, "Translation failure %d indirect idx %d\n",
@@ -1172,11 +1181,11 @@ static int get_indirect(struct vhost_virtqueue *vq,
return ret;
}
/* If this is an input descriptor, increment that count. */
- if (desc.flags & VRING_DESC_F_WRITE) {
+ if (desc.flags & cpu_to_vhost16(vq, VRING_DESC_F_WRITE)) {
*in_num += ret;
if (unlikely(log)) {
- log[*log_num].addr = desc.addr;
- log[*log_num].len = desc.len;
+ log[*log_num].addr = vhost64_to_cpu(vq, desc.addr);
+ log[*log_num].len = vhost32_to_cpu(vq, desc.len);...
2014 Nov 24
2
[PATCH v3 26/41] vhost: virtio 1.0 endian-ness support
...e - iov_count);
if (unlikely(ret < 0)) {
vq_err(vq, "Translation failure %d indirect idx %d\n",
@@ -1172,11 +1181,11 @@ static int get_indirect(struct vhost_virtqueue *vq,
return ret;
}
/* If this is an input descriptor, increment that count. */
- if (desc.flags & VRING_DESC_F_WRITE) {
+ if (desc.flags & cpu_to_vhost16(vq, VRING_DESC_F_WRITE)) {
*in_num += ret;
if (unlikely(log)) {
- log[*log_num].addr = desc.addr;
- log[*log_num].len = desc.len;
+ log[*log_num].addr = vhost64_to_cpu(vq, desc.addr);
+ log[*log_num].len = vhost32_to_cpu(vq, desc.len);...
2014 Aug 27
2
[PATCH 2/3] virtio_ring: Use DMA APIs
...rection);
> +}
> +
> +static void unmap_one(struct vring_virtqueue *vq, struct vring_desc *desc)
> +{
> + if (desc->flags & VRING_DESC_F_INDIRECT) {
> + dma_unmap_single(vq->vq.vdev->dev.parent,
> + desc->addr, desc->len,
> + (desc->flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + } else {
> + dma_unmap_page(vq->vq.vdev->dev.parent,
> + desc->addr, desc->len,
> + (desc->flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + }
> +}
> +
&...
2014 Aug 27
2
[PATCH 2/3] virtio_ring: Use DMA APIs
...rection);
> +}
> +
> +static void unmap_one(struct vring_virtqueue *vq, struct vring_desc *desc)
> +{
> + if (desc->flags & VRING_DESC_F_INDIRECT) {
> + dma_unmap_single(vq->vq.vdev->dev.parent,
> + desc->addr, desc->len,
> + (desc->flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + } else {
> + dma_unmap_page(vq->vq.vdev->dev.parent,
> + desc->addr, desc->len,
> + (desc->flags & VRING_DESC_F_WRITE) ?
> + DMA_FROM_DEVICE : DMA_TO_DEVICE);
> + }
> +}
> +
&...
2014 Oct 07
1
[PATCH RFC 04/11] virtio_ring: implement endian reversal based on VERSION_1 feature.
...+ desc[i].len = cpu_to_virtio_u32(vq->vq.vdev,
+ sg->length);
+ desc[i].next = cpu_to_virtio_u16(vq->vq.vdev,
+ i+1);
i++;
}
}
for (; n < (out_sgs + in_sgs); n++) {
for (sg = sgs[n]; sg; sg = next(sg, &total_in)) {
- desc[i].flags = VRING_DESC_F_NEXT|VRING_DESC_F_WRITE;
- desc[i].addr = sg_phys(sg);
- desc[i].len = sg->length;
- desc[i].next = i+1;
+ desc[i].flags = cpu_to_virtio_u16(vq->vq.vdev,
+ VRING_DESC_F_NEXT|
+ VRING_DESC_F_WRITE);
+ desc[i].addr = cpu_to_virtio_u64(vq->vq.vdev,
+ sg_phys(sg));
+ desc[i].len =...
2014 Oct 07
1
[PATCH RFC 04/11] virtio_ring: implement endian reversal based on VERSION_1 feature.
...+ desc[i].len = cpu_to_virtio_u32(vq->vq.vdev,
+ sg->length);
+ desc[i].next = cpu_to_virtio_u16(vq->vq.vdev,
+ i+1);
i++;
}
}
for (; n < (out_sgs + in_sgs); n++) {
for (sg = sgs[n]; sg; sg = next(sg, &total_in)) {
- desc[i].flags = VRING_DESC_F_NEXT|VRING_DESC_F_WRITE;
- desc[i].addr = sg_phys(sg);
- desc[i].len = sg->length;
- desc[i].next = i+1;
+ desc[i].flags = cpu_to_virtio_u16(vq->vq.vdev,
+ VRING_DESC_F_NEXT|
+ VRING_DESC_F_WRITE);
+ desc[i].addr = cpu_to_virtio_u64(vq->vq.vdev,
+ sg_phys(sg));
+ desc[i].len =...
2018 May 22
0
[RFC v5 3/5] virtio_ring: add packed ring support
...queue *vq,
+ struct vring_desc_state_packed *state)
+{
+ u16 flags;
+
+ if (!vring_use_dma_api(vq->vq.vdev))
+ return;
+
+ flags = state->flags;
+
+ if (flags & VRING_DESC_F_INDIRECT) {
+ dma_unmap_single(vring_dma_dev(vq),
+ state->addr, state->len,
+ (flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ } else {
+ dma_unmap_page(vring_dma_dev(vq),
+ state->addr, state->len,
+ (flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
+}
+
+static void vring_unmap_desc_packed(const struct vring_virtqueue...
2018 Nov 21
1
[PATCH net-next v3 00/13] virtio: support packed ring
...ead = vq->packed.next_avail_idx;
desc = alloc_indirect_packed(total_sg, gfp);
@@ -1001,8 +1002,9 @@ static int virtqueue_add_indirect_packed(struct vring_virtqueue *vq,
if (vring_mapping_error(vq, addr))
goto unmap_release;
- desc[i].flags = cpu_to_le16(n < out_sgs ?
- 0 : VRING_DESC_F_WRITE);
+ desc[i].flags = cpu_to_le16((n < out_sgs ?
+ 0 : VRING_DESC_F_WRITE) |
+ (++c == total_sg ? 0 : VRING_DESC_F_NEXT));
desc[i].addr = cpu_to_le64(addr);
desc[i].len = cpu_to_le32(sg->length);
i++;
--
2.14.1
>
> > v2 -> v3:
> > - Use leXX inste...
2014 Aug 26
0
[PATCH 2/3] virtio_ring: Use DMA APIs
...ge(sg), sg->offset, sg->length, direction);
+}
+
+static void unmap_one(struct vring_virtqueue *vq, struct vring_desc *desc)
+{
+ if (desc->flags & VRING_DESC_F_INDIRECT) {
+ dma_unmap_single(vq->vq.vdev->dev.parent,
+ desc->addr, desc->len,
+ (desc->flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ } else {
+ dma_unmap_page(vq->vq.vdev->dev.parent,
+ desc->addr, desc->len,
+ (desc->flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
+}
+
+static void unmap_indirect(struct vring_virtq...
2018 Jul 11
0
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...queue *vq,
+ struct vring_desc_state_packed *state)
+{
+ u16 flags;
+
+ if (!vring_use_dma_api(vq->vq.vdev))
+ return;
+
+ flags = state->flags;
+
+ if (flags & VRING_DESC_F_INDIRECT) {
+ dma_unmap_single(vring_dma_dev(vq),
+ state->addr, state->len,
+ (flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ } else {
+ dma_unmap_page(vring_dma_dev(vq),
+ state->addr, state->len,
+ (flags & VRING_DESC_F_WRITE) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
+}
+
+static void vring_unmap_desc_packed(const struct vring_virtqueue...
2023 Mar 02
1
[PATCH vhost v1 06/12] virtio_ring: packed: separate DMA codes
...0; n < out_sgs + in_sgs; n++) {
for (sg = sgs[n]; sg; sg = sg_next(sg)) {
- addr = vring_map_one_sg(vq, sg, n < out_sgs ?
- DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (vring_mapping_error(vq, addr))
- goto unmap_release;
-
desc[i].flags = cpu_to_le16(n < out_sgs ?
0 : VRING_DESC_F_WRITE);
- desc[i].addr = cpu_to_le64(addr);
+ desc[i].addr = cpu_to_le64(sg->dma_address);
desc[i].len = cpu_to_le32(sg->length);
i++;
}
@@ -1380,7 +1375,7 @@ static int virtqueue_add_indirect_packed(struct vring_virtqueue *vq,
total_sg * sizeof(struct vring_packed_desc),
DM...