diff options
| author | Will Deacon | 2023-03-29 22:24:59 +0800 |
|---|---|---|
| committer | Tom Rini | 2023-04-25 11:53:15 -0400 |
| commit | 37e53db38bdbeb58732e36d1efcdf58f6ce3a138 (patch) | |
| tree | 002470ae9aa56f198e0ab28dfceb4929f9b155b7 /include | |
| parent | a15d67e01abee6f091a4bcde22fd5e0649590944 (diff) | |
virtio: Allocate bounce buffers for devices with VIRTIO_F_IOMMU_PLATFORM
In preparation for bouncing virtio data for devices advertising the
VIRTIO_F_IOMMU_PLATFORM feature, allocate an array of bounce buffer
structures in the vring, one per descriptor.
Signed-off-by: Will Deacon <willdeacon@google.com>
[ Paul: pick from the Android tree. Rebase to the upstream ]
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Link: https://android.googlesource.com/platform/external/u-boot/+/3e052749e7c50c4c1a6014e645ae3b9be3710c07
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/virtio_ring.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/virtio_ring.h b/include/virtio_ring.h index 8f8a55c7bd3..e8e91044a27 100644 --- a/include/virtio_ring.h +++ b/include/virtio_ring.h @@ -87,6 +87,7 @@ struct vring_used { struct vring { unsigned int num; size_t size; + struct bounce_buffer *bouncebufs; struct vring_desc *desc; struct vring_avail *avail; struct vring_used *used; @@ -146,10 +147,12 @@ static inline unsigned int vring_size(unsigned int num, unsigned long align) } static inline void vring_init(struct vring *vr, unsigned int num, void *p, - unsigned long align) + unsigned long align, + struct bounce_buffer *bouncebufs) { vr->num = num; vr->size = vring_size(num, align); + vr->bouncebufs = bouncebufs; vr->desc = p; vr->avail = p + num * sizeof(struct vring_desc); vr->used = (void *)(((uintptr_t)&vr->avail->ring[num] + |