radeon: add radeon prime vmap support.
This is the same as the nouveau code pretty much.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 492654f..2e24022 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -346,6 +346,9 @@
/* Constant after initialization */
struct radeon_device *rdev;
struct drm_gem_object gem_base;
+
+ struct ttm_bo_kmap_obj dma_buf_vmap;
+ int vmapping_count;
};
#define gem_to_radeon_bo(gobj) container_of((gobj), struct radeon_bo, gem_base)
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index 37ff6bf..8ddab4c7 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -90,6 +90,42 @@
return -EINVAL;
}
+static void *radeon_gem_prime_vmap(struct dma_buf *dma_buf)
+{
+ struct radeon_bo *bo = dma_buf->priv;
+ struct drm_device *dev = bo->rdev->ddev;
+ int ret;
+
+ mutex_lock(&dev->struct_mutex);
+ if (bo->vmapping_count) {
+ bo->vmapping_count++;
+ goto out_unlock;
+ }
+
+ ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
+ &bo->dma_buf_vmap);
+ if (ret) {
+ mutex_unlock(&dev->struct_mutex);
+ return ERR_PTR(ret);
+ }
+ bo->vmapping_count = 1;
+out_unlock:
+ mutex_unlock(&dev->struct_mutex);
+ return bo->dma_buf_vmap.virtual;
+}
+
+static void radeon_gem_prime_vunmap(struct dma_buf *dma_buf, void *vaddr)
+{
+ struct radeon_bo *bo = dma_buf->priv;
+ struct drm_device *dev = bo->rdev->ddev;
+
+ mutex_lock(&dev->struct_mutex);
+ bo->vmapping_count--;
+ if (bo->vmapping_count == 0) {
+ ttm_bo_kunmap(&bo->dma_buf_vmap);
+ }
+ mutex_unlock(&dev->struct_mutex);
+}
const static struct dma_buf_ops radeon_dmabuf_ops = {
.map_dma_buf = radeon_gem_map_dma_buf,
.unmap_dma_buf = radeon_gem_unmap_dma_buf,
@@ -99,6 +135,8 @@
.kunmap = radeon_gem_kunmap,
.kunmap_atomic = radeon_gem_kunmap_atomic,
.mmap = radeon_gem_prime_mmap,
+ .vmap = radeon_gem_prime_vmap,
+ .vunmap = radeon_gem_prime_vunmap,
};
static int radeon_prime_create(struct drm_device *dev,