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drm/ttm: add page order in page pool 

to indicate page order for each element in the pool

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Roger He <Hongbo.He@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roger He 2017-11-21 09:37:52 +08:00 committed by Alex Deucher
parent 1ee0d3d778
commit 6d5e4e3213
1 changed files with 27 additions and 11 deletions
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38
drivers/gpu/drm/ttm/ttm_page_alloc.c
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@ -81,6 +81,7 @@ struct ttm_page_pool {
char *name;
unsigned long nfrees;
unsigned long nrefills;
unsigned int order;
};
/**
@ -412,6 +413,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
struct ttm_page_pool *pool;
int shrink_pages = sc->nr_to_scan;
unsigned long freed = 0;
unsigned int nr_free_pool;
if (!mutex_trylock(&lock))
return SHRINK_STOP;
@ -421,10 +423,15 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
unsigned nr_free = shrink_pages;
if (shrink_pages == 0)
break;
pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
/* OK to use static buffer since global mutex is held. */
shrink_pages = ttm_page_pool_free(pool, nr_free, true);
freed += nr_free - shrink_pages;
nr_free_pool = (nr_free >> pool->order);
if (nr_free_pool == 0)
continue;
shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
freed += ((nr_free_pool - shrink_pages) << pool->order);
}
mutex_unlock(&lock);
return freed;
@ -436,9 +443,12 @@ ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
unsigned i;
unsigned long count = 0;
struct ttm_page_pool *pool;
for (i = 0; i < NUM_POOLS; ++i)
count += _manager->pools[i].npages;
for (i = 0; i < NUM_POOLS; ++i) {
pool = &_manager->pools[i];
count += (pool->npages << pool->order);
}
return count;
}
@ -936,7 +946,7 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
}
static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
char *name)
char *name, unsigned int order)
{
spin_lock_init(&pool->lock);
pool->fill_lock = false;
@ -944,11 +954,17 @@ static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
pool->npages = pool->nfrees = 0;
pool->gfp_flags = flags;
pool->name = name;
pool->order = order;
}
int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
{
int ret;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
unsigned order = HPAGE_PMD_ORDER;
#else
unsigned order = 0;
#endif
WARN_ON(_manager);
@ -956,23 +972,23 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
GFP_USER | GFP_DMA32, "wc dma");
GFP_USER | GFP_DMA32, "wc dma", 0);
ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
GFP_USER | GFP_DMA32, "uc dma");
GFP_USER | GFP_DMA32, "uc dma", 0);
ttm_page_pool_init_locked(&_manager->wc_pool_huge,
GFP_TRANSHUGE & ~(__GFP_MOVABLE | __GFP_COMP),
"wc huge");
"wc huge", order);
ttm_page_pool_init_locked(&_manager->uc_pool_huge,
GFP_TRANSHUGE & ~(__GFP_MOVABLE | __GFP_COMP)
, "uc huge");
, "uc huge", order);
_manager->options.max_size = max_pages;
_manager->options.small = SMALL_ALLOCATION;