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| author | Chengzhe Liu <ChengZhe.Liu@amd.com> | 2021-07-20 15:18:12 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-23 10:09:40 -0400 |
| commit | 1bece222eabeb3d8b10c5f2dadb03b6fb780b050 (patch) | |
| tree | 9504670a7f981c878e732e03ea2dc8fd1c2c6806 /drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c | |
| parent | 5810323ba692895b045e3f1b3e107605c3717dab (diff) | |
| download | linux-1bece222eabeb3d8b10c5f2dadb03b6fb780b050.tar.gz linux-1bece222eabeb3d8b10c5f2dadb03b6fb780b050.tar.bz2 linux-1bece222eabeb3d8b10c5f2dadb03b6fb780b050.zip | |
drm/amdgpu: Clear doorbell interrupt status for Sienna Cichlid
On Sienna Cichlid, in pass-through mode, if we unload the driver in BACO
mode(RTPM), then the kernel would receive thousands of interrupts.
That's because there is doorbell monitor interrupt on BIF, so KVM keeps
injecting interrupts to the guest VM. So we should clear the doorbell
interrupt status after BACO exit.
v2: Modify coding style and commit message
Signed-off-by: Chengzhe Liu <ChengZhe.Liu@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c index 7b79eeaa88aa..b184b656b9b6 100644 --- a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c @@ -508,6 +508,26 @@ static void nbio_v2_3_apply_l1_link_width_reconfig_wa(struct amdgpu_device *adev WREG32_PCIE(smnPCIE_LC_LINK_WIDTH_CNTL, reg_data); } +static void nbio_v2_3_clear_doorbell_interrupt(struct amdgpu_device *adev) +{ + uint32_t reg, reg_data; + + if (adev->asic_type != CHIP_SIENNA_CICHLID) + return; + + reg = RREG32_SOC15(NBIO, 0, mmBIF_RB_CNTL); + + /* Clear Interrupt Status + */ + if ((reg & BIF_RB_CNTL__RB_ENABLE_MASK) == 0) { + reg = RREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL); + if (reg & BIF_DOORBELL_INT_CNTL__DOORBELL_INTERRUPT_STATUS_MASK) { + reg_data = 1 << BIF_DOORBELL_INT_CNTL__DOORBELL_INTERRUPT_CLEAR__SHIFT; + WREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL, reg_data); + } + } +} + const struct amdgpu_nbio_funcs nbio_v2_3_funcs = { .get_hdp_flush_req_offset = nbio_v2_3_get_hdp_flush_req_offset, .get_hdp_flush_done_offset = nbio_v2_3_get_hdp_flush_done_offset, @@ -531,4 +551,5 @@ const struct amdgpu_nbio_funcs nbio_v2_3_funcs = { .program_aspm = nbio_v2_3_program_aspm, .apply_lc_spc_mode_wa = nbio_v2_3_apply_lc_spc_mode_wa, .apply_l1_link_width_reconfig_wa = nbio_v2_3_apply_l1_link_width_reconfig_wa, + .clear_doorbell_interrupt = nbio_v2_3_clear_doorbell_interrupt, }; |