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| 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/soc15.c | |
| parent | 673b366b41e216309c830d86d628e08736172067 (diff) | |
| download | linux-dcea6e65d41f4696571d5d391d3a760cfbb8ee00.tar.gz | |
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/soc15.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/soc15.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c index 78bd00a0142f..78b27c03b8c2 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc15.c +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c @@ -745,6 +745,18 @@ static bool soc15_need_reset_on_init(struct amdgpu_device *adev) return false; } +static uint64_t soc15_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(smnPCIE_RX_NUM_NAK); + nak_g = RREG32_PCIE(smnPCIE_RX_NUM_NAK_GENERATED); + + /* Add the total number of NAKs, i.e the number of replays */ + return (nak_r + nak_g); +} + static const struct amdgpu_asic_funcs soc15_asic_funcs = { .read_disabled_bios = &soc15_read_disabled_bios, @@ -762,6 +774,7 @@ static const struct amdgpu_asic_funcs soc15_asic_funcs = .init_doorbell_index = &vega10_doorbell_index_init, .get_pcie_usage = &soc15_get_pcie_usage, .need_reset_on_init = &soc15_need_reset_on_init, + .get_pcie_replay_count = &soc15_get_pcie_replay_count, }; static const struct amdgpu_asic_funcs vega20_asic_funcs = @@ -781,6 +794,7 @@ static const struct amdgpu_asic_funcs vega20_asic_funcs = .init_doorbell_index = &vega20_doorbell_index_init, .get_pcie_usage = &soc15_get_pcie_usage, .need_reset_on_init = &soc15_need_reset_on_init, + .get_pcie_replay_count = &soc15_get_pcie_replay_count, }; static int soc15_common_early_init(void *handle) |