[PATCH libdrm] amdgpu: add amdgpu_bo_handle_type_kms_noimport

[Marek Olšák]

Christian,

Would you please give me an Rb if the patch is OK with you? I have
spoken with Michel and he would be OK with me pushing it as long as it
gets an Rb from either you or Alex.

Thanks,
Marek

On Wed, Jul 11, 2018 at 8:47 PM, Marek Olšák <maraeo at gmail.com> wrote:
> From: Marek Olšák <marek.olsak at amd.com>
>
> ---
>  amdgpu/amdgpu.h    | 7 ++++++-
>  amdgpu/amdgpu_bo.c | 4 ++++
>  2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
> index 36f91058..be83b457 100644
> --- a/amdgpu/amdgpu.h
> +++ b/amdgpu/amdgpu.h
> @@ -77,21 +77,26 @@ struct drm_amdgpu_info_hw_ip;
>   *
>  */
>  enum amdgpu_bo_handle_type {
>         /** GEM flink name (needs DRM authentication, used by DRI2) */
>         amdgpu_bo_handle_type_gem_flink_name = 0,
>
>         /** KMS handle which is used by all driver ioctls */
>         amdgpu_bo_handle_type_kms = 1,
>
>         /** DMA-buf fd handle */
> -       amdgpu_bo_handle_type_dma_buf_fd = 2
> +       amdgpu_bo_handle_type_dma_buf_fd = 2,
> +
> +       /** KMS handle, but re-importing as a DMABUF handle through
> +        *  drmPrimeHandleToFD is forbidden. (Glamor does that)
> +        */
> +       amdgpu_bo_handle_type_kms_noimport = 3,
>  };
>
>  /** Define known types of GPU VM VA ranges */
>  enum amdgpu_gpu_va_range
>  {
>         /** Allocate from "normal"/general range */
>         amdgpu_gpu_va_range_general = 0
>  };
>
>  enum amdgpu_sw_info {
> diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
> index 9e37b149..d29be244 100644
> --- a/amdgpu/amdgpu_bo.c
> +++ b/amdgpu/amdgpu_bo.c
> @@ -234,20 +234,22 @@ int amdgpu_bo_export(amdgpu_bo_handle bo,
>         case amdgpu_bo_handle_type_gem_flink_name:
>                 r = amdgpu_bo_export_flink(bo);
>                 if (r)
>                         return r;
>
>                 *shared_handle = bo->flink_name;
>                 return 0;
>
>         case amdgpu_bo_handle_type_kms:
>                 amdgpu_add_handle_to_table(bo);
> +               /* fall through */
> +       case amdgpu_bo_handle_type_kms_noimport:
>                 *shared_handle = bo->handle;
>                 return 0;
>
>         case amdgpu_bo_handle_type_dma_buf_fd:
>                 amdgpu_add_handle_to_table(bo);
>                 return drmPrimeHandleToFD(bo->dev->fd, bo->handle,
>                                           DRM_CLOEXEC | DRM_RDWR,
>                                           (int*)shared_handle);
>         }
>         return -EINVAL;
> @@ -299,20 +301,21 @@ int amdgpu_bo_import(amdgpu_device_handle dev,
>                 bo = util_hash_table_get(dev->bo_flink_names,
>                                          (void*)(uintptr_t)shared_handle);
>                 break;
>
>         case amdgpu_bo_handle_type_dma_buf_fd:
>                 bo = util_hash_table_get(dev->bo_handles,
>                                          (void*)(uintptr_t)shared_handle);
>                 break;
>
>         case amdgpu_bo_handle_type_kms:
> +       case amdgpu_bo_handle_type_kms_noimport:
>                 /* Importing a KMS handle in not allowed. */
>                 pthread_mutex_unlock(&dev->bo_table_mutex);
>                 return -EPERM;
>
>         default:
>                 pthread_mutex_unlock(&dev->bo_table_mutex);
>                 return -EINVAL;
>         }
>
>         if (bo) {
> @@ -368,20 +371,21 @@ int amdgpu_bo_import(amdgpu_device_handle dev,
>                 util_hash_table_set(dev->bo_flink_names,
>                                     (void*)(uintptr_t)bo->flink_name, bo);
>                 break;
>
>         case amdgpu_bo_handle_type_dma_buf_fd:
>                 bo->handle = shared_handle;
>                 bo->alloc_size = dma_buf_size;
>                 break;
>
>         case amdgpu_bo_handle_type_kms:
> +       case amdgpu_bo_handle_type_kms_noimport:
>                 assert(0); /* unreachable */
>         }
>
>         /* Initialize it. */
>         atomic_set(&bo->refcount, 1);
>         bo->dev = dev;
>         pthread_mutex_init(&bo->cpu_access_mutex, NULL);
>
>         util_hash_table_set(dev->bo_handles, (void*)(uintptr_t)bo->handle, bo);
>         pthread_mutex_unlock(&dev->bo_table_mutex);
> --
> 2.17.1
>