On Thu, Jul 21, 2022 at 5:52 AM Horace Chen <horace.chen@xxxxxxx> wrote: > > [Why] > Under SR-IOV, if VF is switched out then its doorbell will be disabled, > SDMA rely on WPTR_POLL to get doorbells which was sent during VF > switched-out time. > > [How] > For SR-IOV, set SDMA WPTR_POLL_ENABLE to 1. > > Signed-off-by: Horace Chen <horace.chen@xxxxxxx> Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> > --- > drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c > index 0200cb3a31a4..23b01b121492 100644 > --- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c > +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c > @@ -593,7 +593,10 @@ static int sdma_v6_0_gfx_resume(struct amdgpu_device *adev) > lower_32_bits(ring->rptr_gpu_addr) & 0xFFFFFFFC); > > rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, RPTR_WRITEBACK_ENABLE, 1); > - rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 0); > + if (amdgpu_sriov_vf(adev)) > + rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 1); > + else > + rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, WPTR_POLL_ENABLE, 0); > rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_QUEUE0_RB_CNTL, F32_WPTR_POLL_ENABLE, 1); > > WREG32_SOC15_IP(GC, sdma_v6_0_get_reg_offset(adev, i, regSDMA0_QUEUE0_RB_BASE), ring->gpu_addr >> 8); > -- > 2.25.1 >
