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drm/ttm: return ENOSPC from ttm_bo_mem_space v3

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Only convert it to ENOMEM in ttm_bo_validate.

This allows ttm_bo_validate to distinguish between an out of memory
situation and just out of space in a placement domain.

v2: improve commit message
v3: fix kerneldoc typos

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240112125158.2748-3-christian.koenig@amd.com
This commit is contained in:
Christian König 2023-12-05 16:40:40 +01:00
parent bc77bde2d3
commit 28e5126718
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/ttm/ttm_bo.c
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@ -770,7 +770,7 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
* -ENOMEM: Could not allocate memory for the buffer object, either due to
* -ENOSPC: Could not allocate space for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
@ -830,7 +830,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
goto error;
}
ret = -ENOMEM;
ret = -ENOSPC;
if (!type_found) {
pr_err(TTM_PFX "No compatible memory type found\n");
ret = -EINVAL;
@ -916,6 +916,9 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
return -EINVAL;
ret = ttm_bo_move_buffer(bo, placement, ctx);
/* For backward compatibility with userspace */
if (ret == -ENOSPC)
return -ENOMEM;
if (ret)
return ret;