Commit 35916ace authored by Dave Airlie's avatar Dave Airlie
Browse files

nouveau: add vmap support to nouveau prime support



Tested sharing to udl.
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e8aa1d1e
......@@ -123,6 +123,9 @@ struct nouveau_bo {
struct drm_gem_object *gem;
int pin_refcnt;
struct ttm_bo_kmap_obj dma_buf_vmap;
int vmapping_count;
};
#define nouveau_bo_tile_layout(nvbo) \
......
......@@ -66,6 +66,43 @@ static int nouveau_gem_prime_mmap(struct dma_buf *dma_buf, struct vm_area_struct
return -EINVAL;
}
static void *nouveau_gem_prime_vmap(struct dma_buf *dma_buf)
{
struct nouveau_bo *nvbo = dma_buf->priv;
struct drm_device *dev = nvbo->gem->dev;
int ret;
mutex_lock(&dev->struct_mutex);
if (nvbo->vmapping_count) {
nvbo->vmapping_count++;
goto out_unlock;
}
ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
&nvbo->dma_buf_vmap);
if (ret) {
mutex_unlock(&dev->struct_mutex);
return ERR_PTR(ret);
}
nvbo->vmapping_count = 1;
out_unlock:
mutex_unlock(&dev->struct_mutex);
return nvbo->dma_buf_vmap.virtual;
}
static void nouveau_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr)
{
struct nouveau_bo *nvbo = dma_buf->priv;
struct drm_device *dev = nvbo->gem->dev;
mutex_lock(&dev->struct_mutex);
nvbo->vmapping_count--;
if (nvbo->vmapping_count == 0) {
ttm_bo_kunmap(&nvbo->dma_buf_vmap);
}
mutex_unlock(&dev->struct_mutex);
}
static const struct dma_buf_ops nouveau_dmabuf_ops = {
.map_dma_buf = nouveau_gem_map_dma_buf,
.unmap_dma_buf = nouveau_gem_unmap_dma_buf,
......@@ -75,6 +112,8 @@ static const struct dma_buf_ops nouveau_dmabuf_ops = {
.kunmap = nouveau_gem_kunmap,
.kunmap_atomic = nouveau_gem_kunmap_atomic,
.mmap = nouveau_gem_prime_mmap,
.vmap = nouveau_gem_prime_vmap,
.vunmap = nouveau_gem_prime_vunmap,
};
static int
......
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