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| author | Samuel Zhang <guoqing.zhang@amd.com> | 2025-07-10 14:23:09 +0800 |
|---|---|---|
| committer | Mario Limonciello <mario.limonciello@amd.com> | 2025-07-10 10:49:44 -0500 |
| commit | 40b6a946d21ee7b2b6d394bb2f1cdd3973aa9da5 (patch) | |
| tree | 07132ce21a22465ae8349660fdecda59ba019785 /drivers/gpu | |
| parent | drm/nouveau: Remove waitque for sched teardown (diff) | |
| download | linux-40b6a946d21ee7b2b6d394bb2f1cdd3973aa9da5.tar.gz linux-40b6a946d21ee7b2b6d394bb2f1cdd3973aa9da5.zip | |
drm/ttm: add new api ttm_device_prepare_hibernation()
This new api is used for hibernation to move GTT BOs to shmem after
VRAM eviction. shmem will be flushed to swap disk later to reduce
the system memory usage for hibernation.
Signed-off-by: Samuel Zhang <guoqing.zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250710062313.3226149-2-guoqing.zhang@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_device.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c index 816e2cba6016..c3e2fcbdd2cc 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -125,6 +125,28 @@ out: return ret; } +/** + * ttm_device_prepare_hibernation - move GTT BOs to shmem for hibernation. + * + * @bdev: A pointer to a struct ttm_device to prepare hibernation for. + * + * Return: 0 on success, negative number on failure. + */ +int ttm_device_prepare_hibernation(struct ttm_device *bdev) +{ + struct ttm_operation_ctx ctx = { + .interruptible = false, + .no_wait_gpu = false, + }; + int ret; + + do { + ret = ttm_device_swapout(bdev, &ctx, GFP_KERNEL); + } while (ret > 0); + return ret; +} +EXPORT_SYMBOL(ttm_device_prepare_hibernation); + /* * A buffer object shrink method that tries to swap out the first * buffer object on the global::swap_lru list. |