diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c index cd1a02d30420..1d1ab188ef15 100644 --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c @@ -32,6 +32,9 @@ #define NPS_MODE_MASK 0x000000FFL +/* Core 0 Port 0 counter */ +#define smnPCIEP_NAK_COUNTER 0x1A340218 + static void nbio_v7_9_remap_hdp_registers(struct amdgpu_device *adev) { WREG32_SOC15(NBIO, 0, regBIF_BX0_REMAP_HDP_MEM_FLUSH_CNTL, @@ -427,6 +430,22 @@ static void nbio_v7_9_init_registers(struct amdgpu_device *adev) } } +static u64 nbio_v7_9_get_pcie_replay_count(struct amdgpu_device *adev) +{ + u32 val, nak_r, nak_g; + + if (adev->flags & AMD_IS_APU) + return 0; + + /* Get the number of NAKs received and generated */ + val = RREG32_PCIE(smnPCIEP_NAK_COUNTER); + nak_r = val & 0xFFFF; + nak_g = val >> 16; + + /* Add the total number of NAKs, i.e the number of replays */ + return (nak_r + nak_g); +} + const struct amdgpu_nbio_funcs nbio_v7_9_funcs = { .get_hdp_flush_req_offset = nbio_v7_9_get_hdp_flush_req_offset, .get_hdp_flush_done_offset = nbio_v7_9_get_hdp_flush_done_offset, @@ -450,4 +469,5 @@ const struct amdgpu_nbio_funcs nbio_v7_9_funcs = { .get_compute_partition_mode = nbio_v7_9_get_compute_partition_mode, .get_memory_partition_mode = nbio_v7_9_get_memory_partition_mode, .init_registers = nbio_v7_9_init_registers, + .get_pcie_replay_count = nbio_v7_9_get_pcie_replay_count, }; |