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virtio-gpu: factor out restore mapping

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The same function is going to be used next to restore "blob" resources.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Marc-André Lureau 2023-09-07 17:00:53 +04:00
parent 9c549ab689
commit e92ffae6ba
1 changed files with 33 additions and 27 deletions
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60
hw/display/virtio-gpu.c
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@ -1233,6 +1233,35 @@ static int virtio_gpu_save(QEMUFile *f, void *opaque, size_t size,
return vmstate_save_state(f, &vmstate_virtio_gpu_scanouts, g, NULL);
}
static bool virtio_gpu_load_restore_mapping(VirtIOGPU *g,
struct virtio_gpu_simple_resource *res)
{
int i;
for (i = 0; i < res->iov_cnt; i++) {
hwaddr len = res->iov[i].iov_len;
res->iov[i].iov_base =
dma_memory_map(VIRTIO_DEVICE(g)->dma_as, res->addrs[i], &len,
DMA_DIRECTION_TO_DEVICE, MEMTXATTRS_UNSPECIFIED);
if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
/* Clean up the half-a-mapping we just created... */
if (res->iov[i].iov_base) {
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as, res->iov[i].iov_base,
len, DMA_DIRECTION_TO_DEVICE, 0);
}
/* ...and the mappings for previous loop iterations */
res->iov_cnt = i;
virtio_gpu_cleanup_mapping(g, res);
return false;
}
}
QTAILQ_INSERT_HEAD(&g->reslist, res, next);
g->hostmem += res->hostmem;
return true;
}
static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
const VMStateField *field)
{
@ -1297,35 +1326,12 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
pixman_image_get_stride(res->image) * res->height);
/* restore mapping */
for (i = 0; i < res->iov_cnt; i++) {
hwaddr len = res->iov[i].iov_len;
res->iov[i].iov_base =
dma_memory_map(VIRTIO_DEVICE(g)->dma_as, res->addrs[i], &len,
DMA_DIRECTION_TO_DEVICE,
MEMTXATTRS_UNSPECIFIED);
if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
/* Clean up the half-a-mapping we just created... */
if (res->iov[i].iov_base) {
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
res->iov[i].iov_base,
len,
DMA_DIRECTION_TO_DEVICE,
0);
}
/* ...and the mappings for previous loop iterations */
res->iov_cnt = i;
virtio_gpu_cleanup_mapping(g, res);
pixman_image_unref(res->image);
g_free(res);
return -EINVAL;
}
if (!virtio_gpu_load_restore_mapping(g, res)) {
pixman_image_unref(res->image);
g_free(res);
return -EINVAL;
}
QTAILQ_INSERT_HEAD(&g->reslist, res, next);
g->hostmem += res->hostmem;
resource_id = qemu_get_be32(f);
}