Re: [PATCH v2] [PATCH] drm/amdgpu: Initialise drm_gem_object_funcs for imported BOs

[Alex Deucher <alexdeucher@gmail.com>]

On Tue, Dec 8, 2020 at 3:16 PM Andrey Grodzovsky
<andrey.grodzovsky@amd.com> wrote:
>
> For BOs imported from outside of amdgpu, setting of amdgpu_gem_object_funcs
> was missing in amdgpu_dma_buf_create_obj. Fix by refactoring BO creation
> and amdgpu_gem_object_funcs setting into single function called
> from both code paths.
>
> Fixes: d693def4fd1c ("drm: Remove obsolete GEM and PRIME callbacks
> from struct drm_driver")
>
> v2: Use use amdgpu_gem_object_create() directly
>
> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c |  8 ++++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c     | 41 ++++++++++++++++-------------
>  2 files changed, 29 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> index e5919ef..e42175e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
> @@ -424,6 +424,7 @@ amdgpu_dma_buf_create_obj(struct drm_device *dev, struct dma_buf *dma_buf)
>         struct amdgpu_device *adev = drm_to_adev(dev);
>         struct amdgpu_bo *bo;
>         struct amdgpu_bo_param bp;
> +       struct drm_gem_object *gobj;
>         int ret;
>
>         memset(&bp, 0, sizeof(bp));
> @@ -434,17 +435,20 @@ amdgpu_dma_buf_create_obj(struct drm_device *dev, struct dma_buf *dma_buf)
>         bp.type = ttm_bo_type_sg;
>         bp.resv = resv;
>         dma_resv_lock(resv, NULL);
> -       ret = amdgpu_bo_create(adev, &bp, &bo);
> +       ret = amdgpu_gem_object_create(adev, dma_buf->size, PAGE_SIZE,
> +                       AMDGPU_GEM_DOMAIN_CPU,
> +                       0, ttm_bo_type_sg, resv, &gobj);
>         if (ret)
>                 goto error;
>
> +       bo = gem_to_amdgpu_bo(gobj);
>         bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
>         bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT;
>         if (dma_buf->ops != &amdgpu_dmabuf_ops)
>                 bo->prime_shared_count = 1;
>
>         dma_resv_unlock(resv);
> -       return &bo->tbo.base;
> +       return gobj;
>
>  error:
>         dma_resv_unlock(resv);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index c9f94fb..ccf4d80 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -70,26 +70,12 @@ int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
>         bp.type = type;
>         bp.resv = resv;
>         bp.preferred_domain = initial_domain;
> -retry:
>         bp.flags = flags;
>         bp.domain = initial_domain;
>         r = amdgpu_bo_create(adev, &bp, &bo);
> -       if (r) {
> -               if (r != -ERESTARTSYS) {
> -                       if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
> -                               flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
> -                               goto retry;
> -                       }
> -
> -                       if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
> -                               initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
> -                               goto retry;
> -                       }
> -                       DRM_DEBUG("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
> -                                 size, initial_domain, alignment, r);
> -               }
> +       if (r)
>                 return r;
> -       }
> +
>         *obj = &bo->tbo.base;
>         (*obj)->funcs = &amdgpu_gem_object_funcs;
>
> @@ -239,7 +225,7 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
>         uint64_t size = args->in.bo_size;
>         struct dma_resv *resv = NULL;
>         struct drm_gem_object *gobj;
> -       uint32_t handle;
> +       uint32_t handle, initial_domain;
>         int r;
>
>         /* reject invalid gem flags */
> @@ -283,9 +269,28 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
>                 resv = vm->root.base.bo->tbo.base.resv;
>         }
>
> +retry:
> +       initial_domain = (u32)(0xffffffff & args->in.domains);
>         r = amdgpu_gem_object_create(adev, size, args->in.alignment,
> -                                    (u32)(0xffffffff & args->in.domains),
> +                                    initial_domain,
>                                      flags, ttm_bo_type_device, resv, &gobj);
> +       if (r) {
> +               if (r != -ERESTARTSYS) {
> +                       if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
> +                               flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
> +                               goto retry;
> +                       }
> +
> +                       if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
> +                               initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
> +                               goto retry;
> +                       }
> +                       DRM_DEBUG("Failed to allocate GEM object (%ld, %d, %u, %d)\n",
> +                                 size, initial_domain, args->in.alignment, r);
> +               }
> +               return r;
> +       }
> +
>         if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
>                 if (!r) {
>                         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
> --
> 2.7.4
>
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