Displaying 20 results from an estimated 108 matches for "descs_us".
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descs_used
2023 Mar 02
1
[PATCH vhost v1 01/12] virtio_ring: split: refactor virtqueue_add_split() for premapped
...get_desc_split(struct vring_virtqueue *vq,
+ unsigned int total_sg,
+ unsigned int out_sgs,
+ void *data,
+ void *ctx,
+ gfp_t gfp)
{
- struct vring_virtqueue *vq = to_vvq(_vq);
- struct scatterlist *sg;
struct vring_desc *desc;
- unsigned int i, n, avail, descs_used, prev, err_idx;
- int head;
- bool indirect;
-
- START_USE(vq);
+ unsigned int descs_used;
BUG_ON(data == NULL);
BUG_ON(ctx && vq->indirect);
- if (unlikely(vq->broken)) {
- END_USE(vq);
- return -EIO;
- }
+ if (unlikely(vq->broken))
+ return ERR_PTR(-EIO);
LAST_AD...
2023 Feb 20
2
[PATCH vhost 01/10] virtio_ring: split: refactor virtqueue_add_split() for premapped
...t total_sg,
> + unsigned int out_sgs,
> + unsigned int in_sgs)
> {
> - struct vring_virtqueue *vq = to_vvq(_vq);
> struct scatterlist *sg;
> - struct vring_desc *desc;
> - unsigned int i, n, avail, descs_used, prev, err_idx;
> - int head;
> - bool indirect;
> + unsigned int n;
>
> - START_USE(vq);
> + for (n = 0; n < out_sgs; n++) {
> + for (sg = sgs[n]; sg; sg = sg_next(sg)) {
> + dma_addr_t addr = vring_map_...
2014 Sep 04
1
[PATCH 3/3] virtio_ring: unify direct/indirect code paths.
On Tue, Sep 2, 2014 at 9:29 PM, Rusty Russell <rusty at rustcorp.com.au> wrote:
> virtqueue_add() populates the virtqueue descriptor table from the sgs
> given. If it uses an indirect descriptor table, then it puts a single
> descriptor in the descriptor table pointing to the kmalloc'ed indirect
> table where the sg is populated.
>
> Previously vring_add_indirect() did
2014 Sep 04
1
[PATCH 3/3] virtio_ring: unify direct/indirect code paths.
On Tue, Sep 2, 2014 at 9:29 PM, Rusty Russell <rusty at rustcorp.com.au> wrote:
> virtqueue_add() populates the virtqueue descriptor table from the sgs
> given. If it uses an indirect descriptor table, then it puts a single
> descriptor in the descriptor table pointing to the kmalloc'ed indirect
> table where the sg is populated.
>
> Previously vring_add_indirect() did
2018 Nov 07
2
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...> @@ -766,47 +840,449 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
> void *ctx,
> gfp_t gfp)
> {
> + struct vring_virtqueue *vq = to_vvq(_vq);
> + struct vring_packed_desc *desc;
> + struct scatterlist *sg;
> + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> + __virtio16 uninitialized_var(head_flags), flags;
> + u16 head, avail_wrap_counter, id, curr;
> + bool indirect;
> +
> + START_USE(vq);
> +
> + BUG_ON(data == NULL);
> + BUG_ON(ctx && vq->indirect);
> +
> + if (unlikel...
2018 Nov 07
2
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...> @@ -766,47 +840,449 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
> void *ctx,
> gfp_t gfp)
> {
> + struct vring_virtqueue *vq = to_vvq(_vq);
> + struct vring_packed_desc *desc;
> + struct scatterlist *sg;
> + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> + __virtio16 uninitialized_var(head_flags), flags;
> + u16 head, avail_wrap_counter, id, curr;
> + bool indirect;
> +
> + START_USE(vq);
> +
> + BUG_ON(data == NULL);
> + BUG_ON(ctx && vq->indirect);
> +
> + if (unlikel...
2023 Mar 02
12
[PATCH vhost v1 00/12] virtio core prepares for AF_XDP
XDP socket(AF_XDP) is an excellent bypass kernel network framework. The zero
copy feature of xsk (XDP socket) needs to be supported by the driver. The
performance of zero copy is very good.
ENV: Qemu with vhost.
vhost cpu | Guest APP CPU |Guest Softirq CPU | PPS
-----------------------------|---------------|------------------|------------
xmit by sockperf: 90% | 100%
2018 Nov 08
4
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
On 2018/11/8 ??9:38, Tiwei Bie wrote:
>>> +
>>> + if (vq->vq.num_free < descs_used) {
>>> + pr_debug("Can't add buf len %i - avail = %i\n",
>>> + descs_used, vq->vq.num_free);
>>> + /* FIXME: for historical reasons, we force a notify here if
>>> + * there are outgoing parts to the buffer. Presumably the
>>> +...
2018 Nov 08
4
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
On 2018/11/8 ??9:38, Tiwei Bie wrote:
>>> +
>>> + if (vq->vq.num_free < descs_used) {
>>> + pr_debug("Can't add buf len %i - avail = %i\n",
>>> + descs_used, vq->vq.num_free);
>>> + /* FIXME: for historical reasons, we force a notify here if
>>> + * there are outgoing parts to the buffer. Presumably the
>>> +...
2018 Apr 25
0
[RFC v3 3/5] virtio_ring: add packed ring support
...gs[],
unsigned int total_sg,
@@ -750,47 +802,419 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
void *ctx,
gfp_t gfp)
{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+ struct vring_packed_desc *desc;
+ struct scatterlist *sg;
+ unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
+ __virtio16 uninitialized_var(head_flags), flags;
+ int head, wrap_counter;
+ bool indirect;
+
+ START_USE(vq);
+
+ BUG_ON(data == NULL);
+ BUG_ON(ctx && vq->indirect);
+
+ if (unlikely(vq->broken)) {
+ END_USE(vq);
+ return -EIO;
+ }
+
+#ifdef...
2018 May 22
0
[RFC v5 3/5] virtio_ring: add packed ring support
...gs[],
unsigned int total_sg,
@@ -767,47 +839,437 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
void *ctx,
gfp_t gfp)
{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+ struct vring_packed_desc *desc;
+ struct scatterlist *sg;
+ unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
+ __virtio16 uninitialized_var(head_flags), flags;
+ u16 head, avail_wrap_counter, id, cur;
+ bool indirect;
+
+ START_USE(vq);
+
+ BUG_ON(data == NULL);
+ BUG_ON(ctx && vq->indirect);
+
+ if (unlikely(vq->broken)) {
+ END_USE(vq);
+ return -EIO;...
2018 Nov 08
0
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...inline int virtqueue_add_packed(struct virtqueue *_vq,
> > void *ctx,
> > gfp_t gfp)
> > {
> > + struct vring_virtqueue *vq = to_vvq(_vq);
> > + struct vring_packed_desc *desc;
> > + struct scatterlist *sg;
> > + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> > + __virtio16 uninitialized_var(head_flags), flags;
> > + u16 head, avail_wrap_counter, id, curr;
> > + bool indirect;
> > +
> > + START_USE(vq);
> > +
> > + BUG_ON(data == NULL);
> > + BUG_ON(ctx && vq-...
2018 Jul 11
0
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...gs[],
unsigned int total_sg,
@@ -766,47 +840,449 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
void *ctx,
gfp_t gfp)
{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+ struct vring_packed_desc *desc;
+ struct scatterlist *sg;
+ unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
+ __virtio16 uninitialized_var(head_flags), flags;
+ u16 head, avail_wrap_counter, id, curr;
+ bool indirect;
+
+ START_USE(vq);
+
+ BUG_ON(data == NULL);
+ BUG_ON(ctx && vq->indirect);
+
+ if (unlikely(vq->broken)) {
+ END_USE(vq);
+ return -EIO...
2018 May 16
0
[RFC v4 3/5] virtio_ring: add packed ring support
...gs[],
unsigned int total_sg,
@@ -750,47 +819,446 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
void *ctx,
gfp_t gfp)
{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+ struct vring_packed_desc *desc;
+ struct scatterlist *sg;
+ unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
+ __virtio16 uninitialized_var(head_flags), flags;
+ u16 head, wrap_counter, id;
+ bool indirect;
+
+ START_USE(vq);
+
+ BUG_ON(data == NULL);
+ BUG_ON(ctx && vq->indirect);
+
+ if (unlikely(vq->broken)) {
+ END_USE(vq);
+ return -EIO;
+ }
+
+#if...
2016 Feb 03
0
[PATCH v7 5/9] virtio_ring: Support DMA APIs
...truct vring_desc *alloc_indirect(struct virtqueue *_vq,
unsigned int total_sg, gfp_t gfp)
{
@@ -161,7 +240,7 @@ static inline int virtqueue_add(struct virtqueue *_vq,
struct vring_virtqueue *vq = to_vvq(_vq);
struct scatterlist *sg;
struct vring_desc *desc;
- unsigned int i, n, avail, descs_used, uninitialized_var(prev);
+ unsigned int i, n, avail, descs_used, uninitialized_var(prev), err_idx;
int head;
bool indirect;
@@ -201,21 +280,15 @@ static inline int virtqueue_add(struct virtqueue *_vq,
if (desc) {
/* Use a single buffer which doesn't continue */
- vq->vring.d...
2023 Mar 02
1
[PATCH vhost v1 06/12] virtio_ring: packed: separate DMA codes
...return -ENOMEM;
}
static inline struct vring_packed_desc *virtqueue_get_desc_packed(struct vring_virtqueue *vq,
@@ -1498,15 +1483,14 @@ static inline int virtqueue_add_vring_packed(struct vring_virtqueue *vq,
{
struct vring_packed_desc *desc;
struct scatterlist *sg;
- unsigned int i, n, c, descs_used, err_idx;
+ unsigned int i, n, c, descs_used;
__le16 head_flags, flags;
- u16 head, id, prev, curr, avail_used_flags;
+ u16 head, id, prev, curr;
desc = vq->packed.vring.desc;
head = vq->packed.next_avail_idx;
i = head;
descs_used = total_sg;
- avail_used_flags = vq->packed.a...
2018 Apr 13
3
[RFC v2] virtio: support packed ring
...unsigned int in_sgs,
> > + void *data,
> > + void *ctx,
> > + gfp_t gfp)
> > +{
> > + struct vring_virtqueue *vq = to_vvq(_vq);
> > + struct vring_packed_desc *desc;
> > + struct scatterlist *sg;
> > + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> > + __virtio16 uninitialized_var(head_flags), flags;
> > + int head, wrap_counter;
> > + bool indirect;
> > +
> > + START_USE(vq);
> > +
> > + BUG_ON(data == NULL);
> > + BUG_ON(ctx && vq->indirect);
&...
2018 Apr 13
3
[RFC v2] virtio: support packed ring
...unsigned int in_sgs,
> > + void *data,
> > + void *ctx,
> > + gfp_t gfp)
> > +{
> > + struct vring_virtqueue *vq = to_vvq(_vq);
> > + struct vring_packed_desc *desc;
> > + struct scatterlist *sg;
> > + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> > + __virtio16 uninitialized_var(head_flags), flags;
> > + int head, wrap_counter;
> > + bool indirect;
> > +
> > + START_USE(vq);
> > +
> > + BUG_ON(data == NULL);
> > + BUG_ON(ctx && vq->indirect);
&...
2023 Feb 14
11
[PATCH vhost 00/10] virtio core prepares for AF_XDP
XDP socket(AF_XDP) is an excellent bypass kernel network framework. The zero
copy feature of xsk (XDP socket) needs to be supported by the driver. The
performance of zero copy is very good.
ENV: Qemu with vhost.
vhost cpu | Guest APP CPU |Guest Softirq CPU | PPS
-----------------------------|---------------|------------------|------------
xmit by sockperf: 90% | 100%
2018 Sep 07
1
[PATCH net-next v2 3/5] virtio_ring: add packed ring support
...> @@ -766,47 +840,449 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
> void *ctx,
> gfp_t gfp)
> {
> + struct vring_virtqueue *vq = to_vvq(_vq);
> + struct vring_packed_desc *desc;
> + struct scatterlist *sg;
> + unsigned int i, n, descs_used, uninitialized_var(prev), err_idx;
> + __virtio16 uninitialized_var(head_flags), flags;
> + u16 head, avail_wrap_counter, id, curr;
> + bool indirect;
> +
> + START_USE(vq);
> +
> + BUG_ON(data == NULL);
> + BUG_ON(ctx && vq->indirect);
> +
> + if (unlikel...