From ec9c8933b3c01936b6e4e4dbfcd72847d58df14b Mon Sep 17 00:00:00 2001 From: Huang Rui Date: Tue, 16 Jan 2018 10:42:58 +0800 Subject: [PATCH 0641/2940] drm/amdgpu: fix the VM fault while write at the top of the invisible vram Raven2 has a HW issue that it is unable to use the vram which is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the workaround that increase system aperture high address to get rid of the VM fault and hardware hang. Signed-off-by: Huang Rui Reviewed-by: Alex Deucher Reviewed-by: Hawking Zhang Signed-off-by: Alex Deucher Signed-off-by: Chaudhary Amit Kumar --- drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c | 25 ++++++++++++------------ drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c | 25 ++++++++++++------------ 2 files changed, 24 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c index ceb7847b504f..a4b76a4297f1 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c @@ -74,19 +74,18 @@ static void gfxhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev) WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR, min(adev->gmc.vram_start, adev->gmc.agp_start) >> 18); - if (adev->asic_type == CHIP_RAVEN && adev->rev_id >= 0x8) - /* - * Raven2 has a HW issue that it is unable to use the vram which - * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the - * workaround that increase system aperture high address (add 1) - * to get rid of the VM fault and hardware hang. - */ - WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, - max((adev->gmc.vram_end >> 18) + 0x1, - adev->gmc.agp_end >> 18)); - else - WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, - max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18); + if (adev->asic_type == CHIP_RAVEN && adev->rev_id >= 0x8) + /* + * Raven2 has a HW issue that it is unable to use the vram which + * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the + * workaround that increase system aperture high address (add 1) + * to get rid of the VM fault and hardware hang. + */ + WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, + (max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18) + 0x1); + else + WREG32_SOC15(GC, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, + max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18); /* Set default page address. */ value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c index 14649f8475f3..017f1a638373 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c @@ -92,19 +92,18 @@ static void mmhub_v1_0_init_system_aperture_regs(struct amdgpu_device *adev) WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_LOW_ADDR, min(adev->gmc.vram_start, adev->gmc.agp_start) >> 18); - if (adev->asic_type == CHIP_RAVEN && adev->rev_id >= 0x8) - /* - * Raven2 has a HW issue that it is unable to use the vram which - * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the - * workaround that increase system aperture high address (add 1) - * to get rid of the VM fault and hardware hang. - */ - WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, - max((adev->gmc.vram_end >> 18) + 0x1, - adev->gmc.agp_end >> 18)); - else - WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, - max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18); + if (adev->asic_type == CHIP_RAVEN && adev->rev_id >= 0x8) + /* + * Raven2 has a HW issue that it is unable to use the vram which + * is out of MC_VM_SYSTEM_APERTURE_HIGH_ADDR. So here is the + * workaround that increase system aperture high address (add 1) + * to get rid of the VM fault and hardware hang. + */ + WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, + (max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18) + 0x1); + else + WREG32_SOC15(MMHUB, 0, mmMC_VM_SYSTEM_APERTURE_HIGH_ADDR, + max(adev->gmc.vram_end, adev->gmc.agp_end) >> 18); /* Set default page address. */ value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start + -- 2.17.1