From 1bc3d3cce8c3b44c2b5ac6cee98c830bb40e6b0f Mon Sep 17 00:00:00 2001 From: Chunming Zhou Date: Fri, 9 Feb 2018 10:44:10 +0800 Subject: [PATCH] drm/radeon: only enable swiotlb path when need v2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Monk Liu Reviewed-by: Christian König Signed-off-by: Alex Deucher Link: https://patchwork.freedesktop.org/patch/msgid/20180209024410.1469-3-david1.zhou@amd.com --- drivers/gpu/drm/radeon/radeon.h | 1 + drivers/gpu/drm/radeon/radeon_device.c | 2 ++ drivers/gpu/drm/radeon/radeon_ttm.c | 6 +++--- 3 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index d348878..4a2eb40 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -2387,6 +2387,7 @@ struct radeon_device { struct radeon_dummy_page dummy_page; bool shutdown; bool need_dma32; + bool need_swiotlb; bool accel_working; bool fastfb_working; /* IGP feature*/ bool needs_reset, in_reset; diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 8d3e3d2..7f40c6f 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -1378,6 +1379,7 @@ int radeon_device_init(struct radeon_device *rdev, pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(32)); pr_warn("radeon: No coherent DMA available\n"); } + rdev->need_swiotlb = drm_get_max_iomem() > ((u64)1 << dma_bits); /* Registers mapping */ /* TODO: block userspace mapping of io register */ diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index a0a839b..c1e3862 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -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(>t->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(>t->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 -- 2.7.4