From 5eeae247d227c448d4db8f60ce184ddb0e0feca0 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 10 Apr 2018 10:15:26 -0500 Subject: [PATCH] drm/amdgpu/gfx9: cache DB_DEBUG2 and make it available to userspace MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Userspace needs to query this value to work around a hw bug in certain cases. Acked-by: Nicolai Hähnle Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++ drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 1 + drivers/gpu/drm/amd/amdgpu/soc15.c | 3 +++ 3 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 7e5defbfc3b9..7eb0e4846a76 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -867,6 +867,8 @@ struct amdgpu_gfx_config { /* gfx configure feature */ uint32_t double_offchip_lds_buf; + /* cached value of DB_DEBUG2 */ + uint32_t db_debug2; }; struct amdgpu_cu_info { diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 9d39fd5b1822..66bd6c1c82c0 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -1600,6 +1600,7 @@ static void gfx_v9_0_gpu_init(struct amdgpu_device *adev) gfx_v9_0_setup_rb(adev); gfx_v9_0_get_cu_info(adev, &adev->gfx.cu_info); + adev->gfx.config.db_debug2 = RREG32_SOC15(GC, 0, mmDB_DEBUG2); /* XXX SH_MEM regs */ /* where to put LDS, scratch, GPUVM in FSA64 space */ diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c index 2e9ebe8db5cc..65e781f05c24 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc15.c +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c @@ -287,6 +287,7 @@ static struct soc15_allowed_register_entry soc15_allowed_read_registers[] = { { SOC15_REG_ENTRY(GC, 0, mmCP_CPC_STALLED_STAT1)}, { SOC15_REG_ENTRY(GC, 0, mmCP_CPC_STATUS)}, { SOC15_REG_ENTRY(GC, 0, mmGB_ADDR_CONFIG)}, + { SOC15_REG_ENTRY(GC, 0, mmDB_DEBUG2)}, }; static uint32_t soc15_read_indexed_register(struct amdgpu_device *adev, u32 se_num, @@ -315,6 +316,8 @@ static uint32_t soc15_get_register_value(struct amdgpu_device *adev, } else { if (reg_offset == SOC15_REG_OFFSET(GC, 0, mmGB_ADDR_CONFIG)) return adev->gfx.config.gb_addr_config; + else if (reg_offset == SOC15_REG_OFFSET(GC, 0, mmDB_DEBUG2)) + return adev->gfx.config.db_debug2; return RREG32(reg_offset); } } -- 2.11.0