Re: [PATCH 1/7] accel/qaic: Deprecate ->size field from attach slice IOCTL structure

[Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>]

Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>

On 08.12.2023 17:34, Jeffrey Hugo wrote:
> From: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
> 
> ->size in struct qaic_attach_slice_hdr is redundant since we have BO handle
> and its size can be retrieved from base BO structure.
> 
> Signed-off-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
> Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
> ---
>  drivers/accel/qaic/qaic_data.c | 17 ++++-------------
>  include/uapi/drm/qaic_accel.h  | 13 +------------
>  2 files changed, 5 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/accel/qaic/qaic_data.c b/drivers/accel/qaic/qaic_data.c
> index cf2898eda7ae..0c6f1328df68 100644
> --- a/drivers/accel/qaic/qaic_data.c
> +++ b/drivers/accel/qaic/qaic_data.c
> @@ -830,9 +830,6 @@ static int qaic_prepare_import_bo(struct qaic_bo *bo, struct qaic_attach_slice_h
>  	struct sg_table *sgt;
>  	int ret;
>  
> -	if (obj->import_attach->dmabuf->size < hdr->size)
> -		return -EINVAL;
> -
>  	sgt = dma_buf_map_attachment(obj->import_attach, hdr->dir);
>  	if (IS_ERR(sgt)) {
>  		ret = PTR_ERR(sgt);
> @@ -849,9 +846,6 @@ static int qaic_prepare_export_bo(struct qaic_device *qdev, struct qaic_bo *bo,
>  {
>  	int ret;
>  
> -	if (bo->base.size < hdr->size)
> -		return -EINVAL;
> -
>  	ret = dma_map_sgtable(&qdev->pdev->dev, bo->sgt, hdr->dir, 0);
>  	if (ret)
>  		return -EFAULT;
> @@ -952,9 +946,6 @@ int qaic_attach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_fi
>  	if (arg_size / args->hdr.count != sizeof(*slice_ent))
>  		return -EINVAL;
>  
> -	if (args->hdr.size == 0)
> -		return -EINVAL;
> -
>  	if (!(args->hdr.dir == DMA_TO_DEVICE || args->hdr.dir == DMA_FROM_DEVICE))
>  		return -EINVAL;
>  
> @@ -994,16 +985,16 @@ int qaic_attach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_fi
>  		goto free_slice_ent;
>  	}
>  
> -	ret = qaic_validate_req(qdev, slice_ent, args->hdr.count, args->hdr.size);
> -	if (ret)
> -		goto free_slice_ent;
> -
>  	obj = drm_gem_object_lookup(file_priv, args->hdr.handle);
>  	if (!obj) {
>  		ret = -ENOENT;
>  		goto free_slice_ent;
>  	}
>  
> +	ret = qaic_validate_req(qdev, slice_ent, args->hdr.count, obj->size);
> +	if (ret)
> +		goto put_bo;
> +
>  	bo = to_qaic_bo(obj);
>  	ret = mutex_lock_interruptible(&bo->lock);
>  	if (ret)
> diff --git a/include/uapi/drm/qaic_accel.h b/include/uapi/drm/qaic_accel.h
> index 9dab32316aee..d3ca876a08e9 100644
> --- a/include/uapi/drm/qaic_accel.h
> +++ b/include/uapi/drm/qaic_accel.h
> @@ -242,18 +242,7 @@ struct qaic_attach_slice_entry {
>   * @dbc_id: In. Associate the sliced BO with this DBC.
>   * @handle: In. GEM handle of the BO to slice.
>   * @dir: In. Direction of data flow. 1 = DMA_TO_DEVICE, 2 = DMA_FROM_DEVICE
> - * @size: In. Total length of BO being used. This should not exceed base
> - *	  size of BO (struct drm_gem_object.base)
> - *	  For BOs being allocated using DRM_IOCTL_QAIC_CREATE_BO, size of
> - *	  BO requested is PAGE_SIZE aligned then allocated hence allocated
> - *	  BO size maybe bigger. This size should not exceed the new
> - *	  PAGE_SIZE aligned BO size.
> - * @dev_addr: In. Device address this slice pushes to or pulls from.
> - * @db_addr: In. Address of the doorbell to ring.
> - * @db_data: In. Data to write to the doorbell.
> - * @db_len: In. Size of the doorbell data in bits - 32, 16, or 8.  0 is for
> - *	    inactive doorbells.
> - * @offset: In. Start of this slice as an offset from the start of the BO.
> + * @size: Deprecated. This value is ignored and size of @handle is used instead.
>   */
>  struct qaic_attach_slice_hdr {
>  	__u32 count;