Displaying 20 results from an estimated 113 matches for "err_idx".
2023 Mar 02
1
[PATCH vhost v1 06/12] virtio_ring: packed: separate DMA codes
...io_ring.c
index 6796cbee0207..81a9c0692fec 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1350,7 +1350,7 @@ static int virtqueue_add_indirect_packed(struct vring_virtqueue *vq,
struct vring_packed_desc *desc)
{
struct scatterlist *sg;
- unsigned int i, n, err_idx;
+ unsigned int i, n;
u16 head, id;
dma_addr_t addr;
@@ -1362,14 +1362,9 @@ static int virtqueue_add_indirect_packed(struct vring_virtqueue *vq,
for (n = 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 ?
-...
2023 Mar 22
1
[PATCH vhost v4 02/11] virtio_ring: packed: separate dma codes
...00644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1430,9 +1430,9 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
struct vring_virtqueue *vq = to_vvq(_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;
int err;
START_USE(vq);
@@ -1461,7 +1461,6 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
}
head = vq->packed.next_avail_idx;
-...
2023 Mar 21
1
[PATCH vhost v3 01/11] virtio_ring: split: separate dma codes
...vq,
struct scatterlist *sgs[],
unsigned int total_sg,
@@ -532,9 +614,9 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
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;
+ unsigned int i, n, avail, descs_used, prev;
bool indirect;
+ int head;
START_USE(vq);
@@ -586,32 +668,30 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
return -ENOSPC;
}
+ if (virtqueue_map_sgs(vq, sgs, total_sg, out_sgs, in_sgs))
+ return -ENOMEM;
+...
2023 Mar 02
1
[PATCH vhost v1 02/12] virtio_ring: split: separate DMA codes
...esc *virtqueue_get_desc_split(struct vring_virtqueue *vq,
unsigned int total_sg,
@@ -577,7 +644,7 @@ static inline int virtqueue_add_vring_split(struct vring_virtqueue *vq,
{
struct virtqueue *_vq = &vq->vq;
struct scatterlist *sg;
- unsigned int i, n, avail, descs_used, prev, err_idx;
+ unsigned int i, n, avail, descs_used, prev;
int head;
bool indirect;
@@ -598,30 +665,25 @@ static inline int virtqueue_add_vring_split(struct vring_virtqueue *vq,
for (n = 0; n < out_sgs; n++) {
for (sg = sgs[n]; sg; sg = sg_next(sg)) {
- dma_addr_t addr = vring_map_one_sg(vq,...
2023 Feb 20
2
[PATCH vhost 01/10] virtio_ring: split: refactor virtqueue_add_split() for premapped
...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_one_sg(vq, sg, DM...
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%
2023 Mar 22
1
[PATCH vhost v4 01/11] virtio_ring: split: separate dma codes
...vq,
struct scatterlist *sgs[],
unsigned int total_sg,
@@ -532,9 +614,9 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
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;
+ unsigned int i, n, avail, descs_used, prev;
bool indirect;
+ int head;
START_USE(vq);
@@ -586,32 +668,30 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
return -ENOSPC;
}
+ if (virtqueue_map_sgs(vq, sgs, total_sg, out_sgs, in_sgs))
+ return -ENOMEM;
+...
2023 Apr 25
1
[PATCH vhost v7 01/11] virtio_ring: split: separate dma codes
...vq,
struct scatterlist *sgs[],
unsigned int total_sg,
@@ -532,9 +614,9 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
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;
+ unsigned int i, n, avail, descs_used, prev;
bool indirect;
+ int head;
START_USE(vq);
@@ -586,32 +668,30 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
return -ENOSPC;
}
+ if (virtqueue_map_sgs(vq, sgs, total_sg, out_sgs, in_sgs))
+ goto err_map;
+...
2023 Mar 21
11
[PATCH vhost v3 00/11] 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%
2023 Mar 22
11
[PATCH vhost v4 00/11] 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%
2023 Mar 24
11
[PATCH vhost v5 00/11] 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%
2023 Mar 27
11
[PATCH vhost v6 00/11] 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%
2023 Mar 02
1
[PATCH vhost v1 01/12] virtio_ring: split: refactor virtqueue_add_split() for premapped
...uct 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_ADD_TIME_UPDATE(vq)...
2023 May 09
12
[PATCH vhost v8 00/12] virtio core prepares for AF_XDP
## About DMA APIs
Now, virtio may can not work with DMA APIs when virtio features do not have
VIRTIO_F_ACCESS_PLATFORM.
1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just
work with the "real" devices.
2. I tried to let xsk support callballs to get phy address from virtio-net
driver as the dma address. But the maintainers of xsk may want to use
2016 Nov 22
2
[PATCH 2/2] virtio_ring: fix complaint by sparse
...(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 489bfc6..d2863c3 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -420,7 +420,7 @@ static inline int virtqueue_add(struct virtqueue *_vq,
> if (i == err_idx)
> break;
> vring_unmap_one(vq, &desc[i]);
> - i = vq->vring.desc[i].next;
> + i = virtio16_to_cpu(_vq->vdev, vq->vring.desc[i].next);
> }
>
> vq->vq.num_free += total_sg;
> @@ -601,7 +601,7 @@ bool virtqueue_kick(struct virtqueue *vq)
> st...
2016 Nov 22
2
[PATCH 2/2] virtio_ring: fix complaint by sparse
...(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 489bfc6..d2863c3 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -420,7 +420,7 @@ static inline int virtqueue_add(struct virtqueue *_vq,
> if (i == err_idx)
> break;
> vring_unmap_one(vq, &desc[i]);
> - i = vq->vring.desc[i].next;
> + i = virtio16_to_cpu(_vq->vdev, vq->vring.desc[i].next);
> }
>
> vq->vq.num_free += total_sg;
> @@ -601,7 +601,7 @@ bool virtqueue_kick(struct virtqueue *vq)
> st...
2019 Sep 06
0
[PATCH] virtio_ring: fix unmap of indirect descriptors
...virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index c8be1c4f5b55..d2e001f92e6e 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -566,13 +566,17 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
>
> unmap_release:
> err_idx = i;
> - i = head;
> +
> + if (indirect)
> + i = 0;
> + else
> + i = head;
>
> for (n = 0; n < total_sg; n++) {
> if (i == err_idx)
> break;
> vring_unmap_one_split(vq, &desc[i]);
> - i = virtio16_to_cpu(_vq->vdev, vq->split.vring.de...
2023 Apr 25
12
[PATCH vhost v7 00/11] virtio core prepares for AF_XDP
## About DMA APIs
Now, virtio may can not work with DMA APIs when virtio features do not have
VIRTIO_F_ACCESS_PLATFORM.
1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just
work with the "real" devices.
2. I tried to let xsk support callballs to get phy address from virtio-net
driver as the dma address. But the maintainers of xsk may want to use
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%
2023 May 26
1
[PATCH] virtio_ring: validate used buffer length
...in buffer length, NULL means no used validation */
+ u32 *buflen;
+
/* DMA address and size information */
dma_addr_t ring_dma_addr;
dma_addr_t driver_event_dma_addr;
@@ -552,6 +561,7 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
unsigned int i, n, avail, descs_used, prev, err_idx;
int head;
bool indirect;
+ u32 buflen = 0;
START_USE(vq);
@@ -635,6 +645,7 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
VRING_DESC_F_NEXT |
VRING_DESC_F_WRITE,
indirect);
+ buflen += sg->length;
}
}
/* Last one doesn'...