accel/qaic: Deprecate ->size field from attach slice IOCTL structure

->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>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231208163457.1295993-2-quic_jhugo@quicinc.com

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)

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;