From 8e320f67d49d6bb28eba9c8bded66ad04b0acf0b Mon Sep 17 00:00:00 2001 From: Shane Xiao Date: Thu, 24 Apr 2025 13:15:01 +0800 Subject: [PATCH 3530/5403] drm/amdgpu: Add debug bit for userptr usage MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In VM debug mode, it is desirable to notify the application to correct the freeing sequence by unmapping the memory before destroying the userptr in the old userptr path. Add a bitmask to decide whether to send gpu vm fault to the applition. Signed-off-by: Shane Xiao Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index f59ba0960a77..836ea081088a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1281,6 +1281,7 @@ struct amdgpu_device { bool debug_enable_ras_aca; bool debug_exp_resets; bool debug_disable_gpu_ring_reset; + bool debug_vm_userptr; /* Protection for the following isolation structure */ struct mutex enforce_isolation_mutex; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 7f437aea3d06..4ddd08ce8885 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -143,6 +143,7 @@ enum AMDGPU_DEBUG_MASK { AMDGPU_DEBUG_ENABLE_EXP_RESETS = BIT(5), AMDGPU_DEBUG_DISABLE_GPU_RING_RESET = BIT(6), AMDGPU_DEBUG_SMU_POOL = BIT(7), + AMDGPU_DEBUG_VM_USERPTR = BIT(8), }; unsigned int amdgpu_vram_limit = UINT_MAX; @@ -2273,6 +2274,10 @@ static void amdgpu_init_debug_options(struct amdgpu_device *adev) pr_info("debug: use vram for smu pool\n"); adev->pm.smu_debug_mask |= SMU_DEBUG_POOL_USE_VRAM; } + if (amdgpu_debug_mask & AMDGPU_DEBUG_VM_USERPTR) { + pr_info("debug: VM mode debug for userptr is enabled\n"); + adev->debug_vm_userptr = true; + } } static unsigned long amdgpu_fix_asic_type(struct pci_dev *pdev, unsigned long flags) -- 2.54.0