drm/amdkfd: Add DMABuf import functionality

This is used for interoperability between ROCm compute and graphics
APIs. It allows importing graphics driver BOs into the ROCm SVM
address space for zero-copy GPU access.

The API is split into two steps (query and import) to allow user mode
to manage the virtual address space allocation for the imported buffer.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 3e44d889f7af..71913a18d142 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -39,8 +39,6 @@
 #include <drm/amdgpu_drm.h>
 #include <linux/dma-buf.h>
 
-static const struct dma_buf_ops amdgpu_dmabuf_ops;
-
 /**
  * amdgpu_gem_prime_get_sg_table - &drm_driver.gem_prime_get_sg_table
  * implementation
@@ -332,7 +330,7 @@ static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf,
         return ret;
 }
 
-static const struct dma_buf_ops amdgpu_dmabuf_ops = {
+const struct dma_buf_ops amdgpu_dmabuf_ops = {
         .attach = amdgpu_gem_map_attach,
         .detach = amdgpu_gem_map_detach,
         .map_dma_buf = drm_gem_map_dma_buf,