When hypervisor triggering FLR for one of VFs, need to enable sdma wptr polling to avoid missing wptr update if enabling doorbell.
Signed-off-by: Xiangliang.Yu <[email protected]> --- drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c index b1de44f..b7d69ab 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c @@ -641,10 +641,11 @@ static void sdma_v3_0_enable(struct amdgpu_device *adev, bool enable) static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev) { struct amdgpu_ring *ring; - u32 rb_cntl, ib_cntl; + u32 rb_cntl, ib_cntl, wptr_poll_cntl; u32 rb_bufsz; u32 wb_offset; u32 doorbell; + u64 wptr_gpu_addr; int i, j, r; for (i = 0; i < adev->sdma.num_instances; i++) { @@ -707,6 +708,20 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev) } WREG32(mmSDMA0_GFX_DOORBELL + sdma_offsets[i], doorbell); + /* setup the wptr shadow polling */ + wptr_gpu_addr = adev->wb.gpu_addr + (ring->wptr_offs * 4); + + WREG32(mmSDMA0_GFX_RB_WPTR_POLL_ADDR_LO + sdma_offsets[i], + lower_32_bits(wptr_gpu_addr)); + WREG32(mmSDMA0_GFX_RB_WPTR_POLL_ADDR_HI + sdma_offsets[i], + upper_32_bits(wptr_gpu_addr)); + wptr_poll_cntl = RREG32(mmSDMA0_GFX_RB_WPTR_POLL_CNTL + sdma_offsets[i]); + if (amdgpu_sriov_vf(adev)) + wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl, SDMA0_GFX_RB_WPTR_POLL_CNTL, F32_POLL_ENABLE, 1); + else + wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl, SDMA0_GFX_RB_WPTR_POLL_CNTL, F32_POLL_ENABLE, 0); + WREG32(mmSDMA0_GFX_RB_WPTR_POLL_CNTL + sdma_offsets[i], wptr_poll_cntl); + /* enable DMA RB */ rb_cntl = REG_SET_FIELD(rb_cntl, SDMA0_GFX_RB_CNTL, RB_ENABLE, 1); WREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i], rb_cntl); -- 2.7.4 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
