Add a function to check tmz capability with kernel parameter and ASIC type.
v2: use a per device tmz variable instead of global amdgpu_tmz. v3: refine the comments for the function. (Luben) v4: add amdgpu_tmz.c/h for future use.
Signed-off-by: Huang Rui ray.huang@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/amd/amdgpu/Makefile | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c | 49 ++++++++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h | 3 ++ 4 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c
diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile index 91369c8..270ce82 100644 --- a/drivers/gpu/drm/amd/amdgpu/Makefile +++ b/drivers/gpu/drm/amd/amdgpu/Makefile @@ -55,7 +55,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \ amdgpu_vf_error.o amdgpu_sched.o amdgpu_debugfs.o amdgpu_ids.o \ amdgpu_gmc.o amdgpu_mmhub.o amdgpu_xgmi.o amdgpu_csa.o amdgpu_ras.o amdgpu_vm_cpu.o \ amdgpu_vm_sdma.o amdgpu_pmu.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \ - amdgpu_umc.o smu_v11_0_i2c.o + amdgpu_umc.o smu_v11_0_i2c.o amdgpu_tmz.o
amdgpu-$(CONFIG_PERF_EVENTS) += amdgpu_pmu.o
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 2535db2..e376fe5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -63,6 +63,7 @@ #include "amdgpu_xgmi.h" #include "amdgpu_ras.h" #include "amdgpu_pmu.h" +#include "amdgpu_tmz.h"
#include <linux/suspend.h>
@@ -1032,6 +1033,8 @@ static int amdgpu_device_check_arguments(struct amdgpu_device *adev)
adev->firmware.load_type = amdgpu_ucode_get_load_type(adev, amdgpu_fw_load_type);
+ adev->tmz.enabled = amdgpu_is_tmz(adev); + return ret; }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c new file mode 100644 index 0000000..14a5500 --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c @@ -0,0 +1,49 @@ +/* + * Copyright 2019 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <drm/drmP.h> +#include "amdgpu.h" +#include "amdgpu_tmz.h" + + +/** + * amdgpu_is_tmz - validate trust memory zone + * + * @adev: amdgpu_device pointer + * + * Return true if @dev supports trusted memory zones (TMZ), and return false if + * @dev does not support TMZ. + */ +bool amdgpu_is_tmz(struct amdgpu_device *adev) +{ + if (!amdgpu_tmz) + return false; + + if (adev->asic_type < CHIP_RAVEN || adev->asic_type == CHIP_ARCTURUS) { + dev_warn(adev->dev, "doesn't support trusted memory zones (TMZ)\n"); + return false; + } + + dev_info(adev->dev, "TMZ feature is enabled\n"); + + return true; +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h index 24bbbc2..28e0517 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h @@ -33,4 +33,7 @@ struct amdgpu_tmz { bool enabled; };
+ +extern bool amdgpu_is_tmz(struct amdgpu_device *adev); + #endif