diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0182-drm-vc4-Verify-at-boot-that-CMA-doesn-t-cross-a-256M.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0182-drm-vc4-Verify-at-boot-that-CMA-doesn-t-cross-a-256M.patch | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0182-drm-vc4-Verify-at-boot-that-CMA-doesn-t-cross-a-256M.patch b/target/linux/brcm2708/patches-4.9/950-0182-drm-vc4-Verify-at-boot-that-CMA-doesn-t-cross-a-256M.patch deleted file mode 100644 index f17293ce71..0000000000 --- a/target/linux/brcm2708/patches-4.9/950-0182-drm-vc4-Verify-at-boot-that-CMA-doesn-t-cross-a-256M.patch +++ /dev/null @@ -1,79 +0,0 @@ -From b280acf3c32746106c81419390f5b1869d644f66 Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Mon, 12 Oct 2015 08:58:08 -0700 -Subject: [PATCH] drm/vc4: Verify at boot that CMA doesn't cross a 256MB - boundary. - -I've seen lots of users cranking CMA up higher, so throw an error if -they do. - -Signed-off-by: Eric Anholt <eric@anholt.net> ---- - drivers/base/dma-contiguous.c | 1 + - drivers/gpu/drm/vc4/vc4_v3d.c | 18 ++++++++++++++++++ - mm/cma.c | 2 ++ - 3 files changed, 21 insertions(+) - ---- a/drivers/base/dma-contiguous.c -+++ b/drivers/base/dma-contiguous.c -@@ -35,6 +35,7 @@ - #endif - - struct cma *dma_contiguous_default_area; -+EXPORT_SYMBOL(dma_contiguous_default_area); - - /* - * Default global CMA area size can be defined in kernel's .config. ---- a/drivers/gpu/drm/vc4/vc4_v3d.c -+++ b/drivers/gpu/drm/vc4/vc4_v3d.c -@@ -16,7 +16,10 @@ - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -+#include "linux/init.h" -+#include "linux/cma.h" - #include "linux/component.h" -+#include "linux/dma-contiguous.h" - #include "linux/pm_runtime.h" - #include "vc4_drv.h" - #include "vc4_regs.h" -@@ -188,8 +191,23 @@ static int vc4_v3d_bind(struct device *d - struct drm_device *drm = dev_get_drvdata(master); - struct vc4_dev *vc4 = to_vc4_dev(drm); - struct vc4_v3d *v3d = NULL; -+ struct cma *cma; - int ret; - -+ cma = dev_get_cma_area(dev); -+ if (!cma) -+ return -EINVAL; -+ -+ if ((cma_get_base(cma) & 0xf0000000) != -+ ((cma_get_base(cma) + cma_get_size(cma) - 1) & 0xf0000000)) { -+ DRM_ERROR("V3D requires that the CMA area (0x%08lx - 0x%08lx) " -+ "not span a 256MB boundary, or memory corruption " -+ "would happen.\n", -+ (long)cma_get_base(cma), -+ cma_get_base(cma) + cma_get_size(cma)); -+ return -EINVAL; -+ } -+ - v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL); - if (!v3d) - return -ENOMEM; ---- a/mm/cma.c -+++ b/mm/cma.c -@@ -47,11 +47,13 @@ phys_addr_t cma_get_base(const struct cm - { - return PFN_PHYS(cma->base_pfn); - } -+EXPORT_SYMBOL(cma_get_base); - - unsigned long cma_get_size(const struct cma *cma) - { - return cma->count << PAGE_SHIFT; - } -+EXPORT_SYMBOL(cma_get_size); - - static unsigned long cma_bitmap_aligned_mask(const struct cma *cma, - unsigned int align_order) |