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drm/radeon: only enable swiotlb path when need v2

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swiotlb expands our card accessing range, but its path always is slower
than ttm pool allocation.
So add condition to use it.
v2: move a bit later

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180209024410.1469-3-david1.zhou@amd.com
This commit is contained in:
Chunming Zhou
2018-02-09 10:44:10 +08:00
committed by Alex Deucher
parent fd5fd480dd
commit 1bc3d3cce8
3 changed files with 6 additions and 3 deletions
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6
drivers/gpu/drm/radeon/radeon_ttm.c
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@@ -756,7 +756,7 @@ static int radeon_ttm_tt_populate(struct ttm_tt *ttm,
#endif
#ifdef CONFIG_SWIOTLB
if (swiotlb_nr_tbl()) {
if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
return ttm_dma_populate(&gtt->ttm, rdev->dev, ctx);
}
#endif
@@ -788,7 +788,7 @@ static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
#endif
#ifdef CONFIG_SWIOTLB
if (swiotlb_nr_tbl()) {
if (rdev->need_swiotlb && swiotlb_nr_tbl()) {
ttm_dma_unpopulate(&gtt->ttm, rdev->dev);
return;
}
@@ -1155,7 +1155,7 @@ static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
count = ARRAY_SIZE(radeon_ttm_debugfs_list);
#ifdef CONFIG_SWIOTLB
if (!swiotlb_nr_tbl())
if (!(rdev->need_swiotlb && swiotlb_nr_tbl()))
--count;
#endif