Re: [PATCH] drm/amdkfd: Access gpuvm_export_dmabuf() api

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Am 2023-06-20 um 22:11 schrieb Ramesh Errabolu:
Call KFD api to get Dmabuf instead of calling GEM Prime API

Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@xxxxxxx>
---
  drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 8 ++++----
  1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index cf1db0ab3471..c37d82b35372 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1852,13 +1852,13 @@ static uint32_t get_process_num_bos(struct kfd_process *p)
  	return num_of_bos;
  }
-static int criu_get_prime_handle(struct drm_gem_object *gobj, int flags,
+static int criu_get_prime_handle(struct kgd_mem *mem, int flags,
  				      u32 *shared_fd)
  {
  	struct dma_buf *dmabuf;
  	int ret;
- dmabuf = amdgpu_gem_prime_export(gobj, flags);
+	ret = amdgpu_amdkfd_gpuvm_export_dmabuf(mem, &dmabuf);
  	if (IS_ERR(dmabuf)) {

I think you need to check ret here instead of IS_ERR(dmabuf). Please also check with Rajneesh. I think he ran into this before and I discussed this fix with him.

Otherwise the patch looks reasonable to me.

Thanks,
  Felix


  		ret = PTR_ERR(dmabuf);
  		pr_err("dmabuf export failed for the BO\n");
@@ -1940,7 +1940,7 @@ static int criu_checkpoint_bos(struct kfd_process *p,
  			}
  			if (bo_bucket->alloc_flags
  			    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
-				ret = criu_get_prime_handle(&dumper_bo->tbo.base,
+				ret = criu_get_prime_handle(kgd_mem,
  						bo_bucket->alloc_flags &
  						KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE ? DRM_RDWR : 0,
  						&bo_bucket->dmabuf_fd);
@@ -2402,7 +2402,7 @@ static int criu_restore_bo(struct kfd_process *p,
  	/* create the dmabuf object and export the bo */
  	if (bo_bucket->alloc_flags
  	    & (KFD_IOC_ALLOC_MEM_FLAGS_VRAM | KFD_IOC_ALLOC_MEM_FLAGS_GTT)) {
-		ret = criu_get_prime_handle(&kgd_mem->bo->tbo.base, DRM_RDWR,
+		ret = criu_get_prime_handle(kgd_mem, DRM_RDWR,
  					    &bo_bucket->dmabuf_fd);
  		if (ret)
  			return ret;



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