diff options
| author | Kent Russell <kent.russell@amd.com> | 2019-04-30 06:43:33 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-05-24 12:20:48 -0500 |
| commit | dcea6e65d41f4696571d5d391d3a760cfbb8ee00 (patch) | |
| tree | 156db83858b303fc6ee3a02dd1fbb398b48259c7 /drivers/gpu/drm/amd/amdgpu/vi.c | |
| parent | 673b366b41e216309c830d86d628e08736172067 (diff) | |
drm/amdgpu: Add PCIe replay count sysfs file
Add a sysfs file for reporting the number of PCIe replays (NAKs). This
returns the sum of NAKs received and NAKs generated
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/vi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/vi.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c index 5e5b42a0744a..b8adf3808de2 100644 --- a/drivers/gpu/drm/amd/amdgpu/vi.c +++ b/drivers/gpu/drm/amd/amdgpu/vi.c @@ -987,6 +987,18 @@ static void vi_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0, *count1 = RREG32_PCIE(ixPCIE_PERF_COUNT1_TXCLK) | (cnt1_of << 32); } +static uint64_t vi_get_pcie_replay_count(struct amdgpu_device *adev) +{ + uint64_t nak_r, nak_g; + + /* Get the number of NAKs received and generated */ + nak_r = RREG32_PCIE(ixPCIE_RX_NUM_NAK); + nak_g = RREG32_PCIE(ixPCIE_RX_NUM_NAK_GENERATED); + + /* Add the total number of NAKs, i.e the number of replays */ + return (nak_r + nak_g); +} + static bool vi_need_reset_on_init(struct amdgpu_device *adev) { u32 clock_cntl, pc; @@ -1021,6 +1033,7 @@ static const struct amdgpu_asic_funcs vi_asic_funcs = .init_doorbell_index = &legacy_doorbell_index_init, .get_pcie_usage = &vi_get_pcie_usage, .need_reset_on_init = &vi_need_reset_on_init, + .get_pcie_replay_count = &vi_get_pcie_replay_count, }; #define CZ_REV_BRISTOL(rev) \ |