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drm/amdgpu: Add sysfs file for PCIe usage v5

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Add a sysfs file that reports the number of bytes transmitted and
received in the last second. This can be used to approximate the PCIe
bandwidth usage over the last second.

v2: Clarify use of mps as estimation of bandwidth
v3: Don't make the file on APUs
v4: Early exit for APUs in the read function, change output to
    display "packets-received packets-sent mps"
v5: fix missing header for si (Alex)

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Kent Russell
2019-01-03 08:12:39 -05:00
committed by Alex Deucher
parent a0bb79e255
commit b45e18acd3
6 changed files with 232 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -542,6 +542,9 @@ struct amdgpu_asic_funcs {
bool (*need_full_reset)(struct amdgpu_device *adev);
/* initialize doorbell layout for specific asic*/
void (*init_doorbell_index)(struct amdgpu_device *adev);
/* PCIe bandwidth usage */
void (*get_pcie_usage)(struct amdgpu_device *adev, uint64_t *count0,
uint64_t *count1);
};
/*
@@ -1042,6 +1045,7 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
#define amdgpu_asic_invalidate_hdp(adev, r) (adev)->asic_funcs->invalidate_hdp((adev), (r))
#define amdgpu_asic_need_full_reset(adev) (adev)->asic_funcs->need_full_reset((adev))
#define amdgpu_asic_init_doorbell_index(adev) (adev)->asic_funcs->init_doorbell_index((adev))
#define amdgpu_asic_get_pcie_usage(adev, cnt0, cnt1) ((adev)->asic_funcs->get_pcie_usage((adev), (cnt0), (cnt1)))
/* Common functions */
bool amdgpu_device_should_recover_gpu(struct amdgpu_device *adev);