Userspace is the one in charge of flush CPU by wrapping mmap with
begin{,end}_cpu_access.
v2: Remove LLC check cause we have dma-buf sync providers now. Also, fix return
before transferring ownership when mmap fails.
Signed-off-by: Tiago Vignatti <tiago.vignatti at intel.com>
---
drivers/gpu/drm/i915/i915_gem_dmabuf.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index e9c2bfd..b608f67 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -193,7 +193,23 @@ static void i915_gem_dmabuf_kunmap(struct dma_buf
*dma_buf, unsigned long page_n
static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct
*vma)
{
- return -EINVAL;
+ struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
+ int ret;
+
+ if (obj->base.size < vma->vm_end - vma->vm_start)
+ return -EINVAL;
+
+ if (WARN_ON(!obj->base.filp))
+ return -EINVAL;
+
+ ret = obj->base.filp->f_op->mmap(obj->base.filp, vma);
+ if (IS_ERR_VALUE(ret))
+ return -EINVAL;
+
+ fput(vma->vm_file);
+ vma->vm_file = get_file(obj->base.filp);
+
+ return ret;
}
static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, size_t start,
size_t length, enum dma_data_direction direction)
--
2.1.0
