From: "Xiangliang.Yu" <Xiangliang.Yu@amd.com>
Date: Tue, 12 Sep 2017 17:31:46 +0800
Subject: drm/amdgpu/sdma3: Enable sdma wptr polling for SRIOV
Git-commit: e33dac39bcf9978061df95f1510b2ec6bfab07fc
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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 <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
--- 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 amdg
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 a
}
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);