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drm/ttm: allocate/free multiple pages in a single call

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Totally surprisingly this is more efficient than doing it page by page.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2017-09-19 15:20:42 +02:00 committed by Alex Deucher
parent a05502e5cf
commit c6e839a3e2
1 changed files with 14 additions and 15 deletions
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29
drivers/gpu/drm/ttm/ttm_page_alloc.c
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@ -873,15 +873,14 @@ int ttm_pool_populate(struct ttm_tt *ttm)
if (ttm->state != tt_unpopulated)
return 0;
for (i = 0; i < ttm->num_pages; ++i) {
ret = ttm_get_pages(&ttm->pages[i], 1,
ttm->page_flags,
ttm->caching_state);
if (ret != 0) {
ttm_pool_unpopulate(ttm);
return -ENOMEM;
}
ret = ttm_get_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
ttm->caching_state);
if (unlikely(ret != 0)) {
ttm_pool_unpopulate(ttm);
return ret;
}
for (i = 0; i < ttm->num_pages; ++i) {
ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
PAGE_SIZE);
if (unlikely(ret != 0)) {
@ -908,14 +907,14 @@ void ttm_pool_unpopulate(struct ttm_tt *ttm)
unsigned i;
for (i = 0; i < ttm->num_pages; ++i) {
if (ttm->pages[i]) {
ttm_mem_global_free_page(ttm->glob->mem_glob,
ttm->pages[i], PAGE_SIZE);
ttm_put_pages(&ttm->pages[i], 1,
ttm->page_flags,
ttm->caching_state);
}
if (!ttm->pages[i])
continue;
ttm_mem_global_free_page(ttm->glob->mem_glob, ttm->pages[i],
PAGE_SIZE);
}
ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
ttm->caching_state);
ttm->state = tt_unpopulated;
}
EXPORT_SYMBOL(ttm_pool_unpopulate);