Re: [PATCH libdrm] libdrm_amdgpu: add kernel semaphore support

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Chrstian,

you are probably the best person to ack this, I'd like to get the radv
code landed
and allow the GL code to get going.

Dave.

> This adds kernel semaphore support to the command submission
> interface in what should be a backwards compatible manner,
> it adds a new command submission API.
>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
> ---
>  amdgpu/amdgpu.h    |  29 ++++++++++++-
>  amdgpu/amdgpu_cs.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++----
>  2 files changed, 138 insertions(+), 9 deletions(-)
>
> diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
> index 1901fa8..649b66e 100644
> --- a/amdgpu/amdgpu.h
> +++ b/amdgpu/amdgpu.h
> @@ -369,6 +369,16 @@ struct amdgpu_cs_request {
>         struct amdgpu_cs_fence_info fence_info;
>  };
>
> +struct amdgpu_cs_request_syncobj {
> +       /*
> +        *
> +        */
> +       uint32_t number_in_syncobj;
> +       uint32_t number_out_syncobj;
> +       uint32_t *in_syncobj;
> +       uint32_t *out_syncobj;
> +};
> +
>  /**
>   * Structure which provide information about GPU VM MC Address space
>   * alignments requirements
> @@ -886,6 +896,12 @@ int amdgpu_cs_submit(amdgpu_context_handle context,
>                      struct amdgpu_cs_request *ibs_request,
>                      uint32_t number_of_requests);
>
> +int amdgpu_cs_submit_syncobj(amdgpu_context_handle context,
> +                            uint64_t flags,
> +                            struct amdgpu_cs_request *ibs_request,
> +                            struct amdgpu_cs_request_syncobj *ibs_syncobj,
> +                            uint32_t number_of_requests);
> +
>  /**
>   *  Query status of Command Buffer Submission
>   *
> @@ -1328,8 +1344,19 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem);
>  */
>  const char *amdgpu_get_marketing_name(amdgpu_device_handle dev);
>
> +
> +int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
> +                            uint32_t *syncobj);
> +int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
> +                            uint32_t syncobj,
> +                            int *shared_fd);
> +int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
> +                            int shared_fd,
> +                            uint32_t *syncobj);
> +int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
> +                             uint32_t syncobj);
> +
>  #ifdef __cplusplus
>  }
>  #endif
> -
>  #endif /* #ifdef _AMDGPU_H_ */
> diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
> index 868eb7b..339c5f9 100644
> --- a/amdgpu/amdgpu_cs.c
> +++ b/amdgpu/amdgpu_cs.c
> @@ -168,7 +168,8 @@ int amdgpu_cs_query_reset_state(amdgpu_context_handle context,
>   * \sa amdgpu_cs_submit()
>  */
>  static int amdgpu_cs_submit_one(amdgpu_context_handle context,
> -                               struct amdgpu_cs_request *ibs_request)
> +                               struct amdgpu_cs_request *ibs_request,
> +                               struct amdgpu_cs_request_syncobj *syncobj_request)
>  {
>         union drm_amdgpu_cs cs;
>         uint64_t *chunk_array;
> @@ -176,10 +177,13 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>         struct drm_amdgpu_cs_chunk_data *chunk_data;
>         struct drm_amdgpu_cs_chunk_dep *dependencies = NULL;
>         struct drm_amdgpu_cs_chunk_dep *sem_dependencies = NULL;
> +       struct drm_amdgpu_cs_chunk_sem *in_syncobj_dependencies = NULL;
> +       struct drm_amdgpu_cs_chunk_sem *out_syncobj_dependencies = NULL;
>         struct list_head *sem_list;
>         amdgpu_semaphore_handle sem, tmp;
> -       uint32_t i, size, sem_count = 0;
> +       uint32_t i, j, size, sem_count = 0;
>         bool user_fence;
> +       uint32_t sem_size = 0;
>         int r = 0;
>
>         if (ibs_request->ip_type >= AMDGPU_HW_IP_NUM)
> @@ -194,7 +198,11 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>         }
>         user_fence = (ibs_request->fence_info.handle != NULL);
>
> -       size = ibs_request->number_of_ibs + (user_fence ? 2 : 1) + 1;
> +       if (syncobj_request) {
> +               sem_size += syncobj_request->number_in_syncobj ? 1 : 0;
> +               sem_size += syncobj_request->number_out_syncobj ? 1 : 0;
> +       }
> +       size = ibs_request->number_of_ibs + (user_fence ? 2 : 1) + 1 + sem_size;
>
>         chunk_array = alloca(sizeof(uint64_t) * size);
>         chunks = alloca(sizeof(struct drm_amdgpu_cs_chunk) * size);
> @@ -306,6 +314,45 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
>                 chunks[i].chunk_data = (uint64_t)(uintptr_t)sem_dependencies;
>         }
>
> +       if (syncobj_request) {
> +               if (syncobj_request->number_in_syncobj) {
> +                       in_syncobj_dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_sem) * syncobj_request->number_in_syncobj);
> +                       if (!in_syncobj_dependencies) {
> +                               r = -ENOMEM;
> +                               goto error_unlock;
> +                       }
> +                       for (j = 0; j < syncobj_request->number_in_syncobj; j++) {
> +                               struct drm_amdgpu_cs_chunk_sem *dep = &in_syncobj_dependencies[j];
> +                               dep->handle = syncobj_request->in_syncobj[j];
> +                       }
> +                       i = cs.in.num_chunks++;
> +
> +                       /* dependencies chunk */
> +                       chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
> +                       chunks[i].chunk_id = AMDGPU_CHUNK_ID_SYNCOBJ_IN;
> +                       chunks[i].length_dw = sizeof(struct drm_amdgpu_cs_chunk_sem) / 4 * syncobj_request->number_in_syncobj;
> +                       chunks[i].chunk_data = (uint64_t)(uintptr_t)in_syncobj_dependencies;
> +               }
> +               if (syncobj_request->number_out_syncobj) {
> +                       out_syncobj_dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_sem) * syncobj_request->number_out_syncobj);
> +                       if (!out_syncobj_dependencies) {
> +                               r = -ENOMEM;
> +                               goto error_unlock;
> +                       }
> +                       for (j = 0; j < syncobj_request->number_out_syncobj; j++) {
> +                               struct drm_amdgpu_cs_chunk_sem *dep = &out_syncobj_dependencies[j];
> +                               dep->handle = syncobj_request->out_syncobj[j];
> +                       }
> +                       i = cs.in.num_chunks++;
> +
> +                       /* dependencies chunk */
> +                       chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
> +                       chunks[i].chunk_id = AMDGPU_CHUNK_ID_SYNCOBJ_OUT;
> +                       chunks[i].length_dw = sizeof(struct drm_amdgpu_cs_chunk_sem) / 4 * syncobj_request->number_out_syncobj;
> +                       chunks[i].chunk_data = (uint64_t)(uintptr_t)out_syncobj_dependencies;
> +               }
> +       }
> +
>         r = drmCommandWriteRead(context->dev->fd, DRM_AMDGPU_CS,
>                                 &cs, sizeof(cs));
>         if (r)
> @@ -317,31 +364,48 @@ error_unlock:
>         pthread_mutex_unlock(&context->sequence_mutex);
>         free(dependencies);
>         free(sem_dependencies);
> +       free(in_syncobj_dependencies);
> +       free(out_syncobj_dependencies);
>         return r;
>  }
>
> -int amdgpu_cs_submit(amdgpu_context_handle context,
> -                    uint64_t flags,
> -                    struct amdgpu_cs_request *ibs_request,
> -                    uint32_t number_of_requests)
> +int amdgpu_cs_submit_syncobj(amdgpu_context_handle context,
> +                            uint64_t flags,
> +                            struct amdgpu_cs_request *ibs_request,
> +                            struct amdgpu_cs_request_syncobj *ibs_syncobj,
> +                            uint32_t number_of_requests)
>  {
>         uint32_t i;
>         int r;
> +       bool has_syncobj = ibs_syncobj ? true : false;
>
>         if (!context || !ibs_request)
>                 return -EINVAL;
>
>         r = 0;
>         for (i = 0; i < number_of_requests; i++) {
> -               r = amdgpu_cs_submit_one(context, ibs_request);
> +               r = amdgpu_cs_submit_one(context, ibs_request, has_syncobj ? ibs_syncobj : NULL);
>                 if (r)
>                         break;
>                 ibs_request++;
> +               if (has_syncobj)
> +                       ibs_syncobj++;
>         }
>
>         return r;
>  }
>
> +int amdgpu_cs_submit(amdgpu_context_handle context,
> +                    uint64_t flags,
> +                    struct amdgpu_cs_request *ibs_request,
> +                    uint32_t number_of_requests)
> +{
> +       return amdgpu_cs_submit_syncobj(context, flags,
> +                                       ibs_request, NULL,
> +                                       number_of_requests);
> +}
> +
> +
>  /**
>   * Calculate absolute timeout.
>   *
> @@ -596,3 +660,41 @@ int amdgpu_cs_destroy_semaphore(amdgpu_semaphore_handle sem)
>  {
>         return amdgpu_cs_unreference_sem(sem);
>  }
> +
> +int amdgpu_cs_create_syncobj(amdgpu_device_handle dev,
> +                            uint32_t *handle)
> +{
> +       if (NULL == dev)
> +               return -EINVAL;
> +
> +       return drmSyncobjCreate(dev->fd, 0, handle);
> +}
> +
> +int amdgpu_cs_destroy_syncobj(amdgpu_device_handle dev,
> +                             uint32_t handle)
> +{
> +       if (NULL == dev)
> +               return -EINVAL;
> +
> +       return drmSyncobjDestroy(dev->fd, handle);
> +}
> +
> +int amdgpu_cs_export_syncobj(amdgpu_device_handle dev,
> +                            uint32_t handle,
> +                            int *shared_fd)
> +{
> +       if (NULL == dev)
> +               return -EINVAL;
> +
> +       return drmSyncobjHandleToFD(dev->fd, handle, shared_fd);
> +}
> +
> +int amdgpu_cs_import_syncobj(amdgpu_device_handle dev,
> +                            int shared_fd,
> +                            uint32_t *handle)
> +{
> +       if (NULL == dev)
> +               return -EINVAL;
> +
> +       return drmSyncobjFDToHandle(dev->fd, shared_fd, handle);
> +}
> --
> 2.9.4
>
> _______________________________________________
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> amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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