Ping....
Hi all,
Please help review this, the regression introduced by the commit
2ffe31deb27579e2f2c9444e01f4d8abf385d145 is gating the sriov sanity test.
Best Wishes,
Emily Deng
> -----Original Message-----
> From: Emily Deng [mailto:emily.d...@amd.com]
> Sent: Friday, March 02, 2018 11:32 AM
> To: amd-gfx@lists.freedesktop.org
> Cc: Deng, Emily <emily.d...@amd.com>
> Subject: [PATCH] Revert "drm/amdgpu: use polling mem to set SDMA3 wptr
> for VF"
>
> This reverts commit 2ffe31deb27579e2f2c9444e01f4d8abf385d145.
> The sdma wptr poll memomy doesn't have the same efficiency as doorbell,
> and it will make sdma hang when running tests.
>
> Change-Id: I6e334430b309b0c21aa18a08764320c7ff51e353
> Signed-off-by: Emily Deng <emily.d...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 -
> drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 27 ++++++++-------------------
> 2 files changed, 8 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> index 102dad3..5dcf98b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> @@ -186,7 +186,6 @@ struct amdgpu_ring {
> uint64_t eop_gpu_addr;
> u32 doorbell_index;
> bool use_doorbell;
> - bool use_pollmem;
> unsigned wptr_offs;
> unsigned fence_offs;
> uint64_t current_ctx;
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> index 521978c..d3fb3ca 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
> @@ -355,7 +355,7 @@ static uint64_t sdma_v3_0_ring_get_wptr(struct
> amdgpu_ring *ring)
> struct amdgpu_device *adev = ring->adev;
> u32 wptr;
>
> - if (ring->use_doorbell || ring->use_pollmem) {
> + if (ring->use_doorbell) {
> /* XXX check if swapping is necessary on BE */
> wptr = ring->adev->wb.wb[ring->wptr_offs] >> 2;
> } else {
> @@ -380,13 +380,10 @@ static void sdma_v3_0_ring_set_wptr(struct
> amdgpu_ring *ring)
>
> if (ring->use_doorbell) {
> u32 *wb = (u32 *)&adev->wb.wb[ring->wptr_offs];
> +
> /* XXX check if swapping is necessary on BE */
> WRITE_ONCE(*wb, (lower_32_bits(ring->wptr) << 2));
> WDOORBELL32(ring->doorbell_index, lower_32_bits(ring-
> >wptr) << 2);
> - } else if (ring->use_pollmem) {
> - u32 *wb = (u32 *)&adev->wb.wb[ring->wptr_offs];
> -
> - WRITE_ONCE(*wb, (lower_32_bits(ring->wptr) << 2));
> } else {
> int me = (ring == &ring->adev->sdma.instance[0].ring) ? 0 : 1;
>
> @@ -719,14 +716,10 @@ static int sdma_v3_0_gfx_resume(struct
> amdgpu_device *adev)
> 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 (ring->use_pollmem)
> - wptr_poll_cntl = REG_SET_FIELD(wptr_poll_cntl,
> -
> SDMA0_GFX_RB_WPTR_POLL_CNTL,
> - ENABLE, 1);
> + 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,
> - ENABLE, 0);
> + 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 */
> @@ -1208,13 +1201,9 @@ static int sdma_v3_0_sw_init(void *handle)
> for (i = 0; i < adev->sdma.num_instances; i++) {
> ring = &adev->sdma.instance[i].ring;
> ring->ring_obj = NULL;
> - if (!amdgpu_sriov_vf(adev)) {
> - ring->use_doorbell = true;
> - ring->doorbell_index = (i == 0) ?
> - AMDGPU_DOORBELL_sDMA_ENGINE0 :
> AMDGPU_DOORBELL_sDMA_ENGINE1;
> - } else {
> - ring->use_pollmem = true;
> - }
> + ring->use_doorbell = true;
> + ring->doorbell_index = (i == 0) ?
> + AMDGPU_DOORBELL_sDMA_ENGINE0 :
> AMDGPU_DOORBELL_sDMA_ENGINE1;
>
> sprintf(ring->name, "sdma%d", i);
> r = amdgpu_ring_init(adev, ring, 1024,
> --
> 2.7.4
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