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drm/ttm: re-add debugfs tt_shrink file 

That got lost when we moved back to a static limit.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210409130113.1459-2-christian.koenig@amd.com
This commit is contained in:
Christian König 2021-04-09 15:00:10 +02:00
parent a28e10ed99
commit b057f37bb2
1 changed files with 20 additions and 0 deletions
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20
drivers/gpu/drm/ttm/ttm_tt.c
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@ -389,6 +389,21 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
}
#ifdef CONFIG_DEBUG_FS
/* Test the shrinker functions and dump the result */
static int ttm_tt_debugfs_shrink_show(struct seq_file *m, void *data)
{
struct ttm_operation_ctx ctx = { false, false };
seq_printf(m, "%d\n", ttm_global_swapout(&ctx, GFP_KERNEL));
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ttm_tt_debugfs_shrink);
#endif
/**
* ttm_tt_mgr_init - register with the MM shrinker
*
@ -396,6 +411,11 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
*/
void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages)
{
#ifdef CONFIG_DEBUG_FS
debugfs_create_file("tt_shrink", 0400, ttm_debugfs_root, NULL,
&ttm_tt_debugfs_shrink_fops);
#endif
if (!ttm_pages_limit)
ttm_pages_limit = num_pages;