drm/ttm: allocate/free multiple pages in a single call
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>
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@ -873,15 +873,14 @@ int ttm_pool_populate(struct ttm_tt *ttm)
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if (ttm->state != tt_unpopulated)
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return 0;
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for (i = 0; i < ttm->num_pages; ++i) {
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ret = ttm_get_pages(&ttm->pages[i], 1,
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ttm->page_flags,
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ttm->caching_state);
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if (ret != 0) {
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ttm_pool_unpopulate(ttm);
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return -ENOMEM;
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}
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ret = ttm_get_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
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ttm->caching_state);
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if (unlikely(ret != 0)) {
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ttm_pool_unpopulate(ttm);
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return ret;
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}
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for (i = 0; i < ttm->num_pages; ++i) {
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ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
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PAGE_SIZE);
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if (unlikely(ret != 0)) {
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@ -908,14 +907,14 @@ void ttm_pool_unpopulate(struct ttm_tt *ttm)
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unsigned i;
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for (i = 0; i < ttm->num_pages; ++i) {
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if (ttm->pages[i]) {
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ttm_mem_global_free_page(ttm->glob->mem_glob,
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ttm->pages[i], PAGE_SIZE);
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ttm_put_pages(&ttm->pages[i], 1,
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ttm->page_flags,
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ttm->caching_state);
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}
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if (!ttm->pages[i])
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continue;
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ttm_mem_global_free_page(ttm->glob->mem_glob, ttm->pages[i],
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PAGE_SIZE);
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}
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ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
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ttm->caching_state);
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ttm->state = tt_unpopulated;
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}
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EXPORT_SYMBOL(ttm_pool_unpopulate);
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