[PATCH] drm/amdgpu: Add GDS clearing workaround in later init for gfx9

[Christian König]

Yeah, that would be a good idea as well.

Additional to that I suggest to update GDS_VMID0_BASE/_SIZE with direct 
register writes instead of PM4 packets.

Christian.

Am 07.06.19 um 22:16 schrieb Shamis, Leonid:
> James,
>
> Do you set GDS_VMID0_BASE to 0?.. I don't see it in your patch.
>
> Regards,
> Leonid
>
> On 2019-06-07, 15:42, "Zhu, James" <James.Zhu at amd.com> wrote:
>
>      
>      On 2019-06-07 3:12 p.m., Zhu, James wrote:
>      > On 2019-06-07 2:16 p.m., Alex Deucher wrote:
>      >> On Fri, Jun 7, 2019 at 12:38 PM Zhu, James <James.Zhu at amd.com> wrote:
>      >>> Since Hardware bug, GDS exist ECC error after cold boot up,
>      >>> adding GDS clearing workaround in later init for gfx9.
>      >>>
>      >>> Signed-off-by: James Zhu <James.Zhu at amd.com>
>      >>> ---
>      >>>    drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 48 +++++++++++++++++++++++++++++++++++
>      >>>    1 file changed, 48 insertions(+)
>      >>>
>      >>> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>      >>> index 76722fc..81f6ba8 100644
>      >>> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>      >>> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
>      >>> @@ -3634,6 +3634,50 @@ static const struct soc15_reg_entry sec_ded_counter_registers[] = {
>      >>>       { SOC15_REG_ENTRY(GC, 0, mmSQC_EDC_CNT3), 0, 4, 6},
>      >>>    };
>      >>>
>      >>> +
>      >>> +static int gfx_v9_0_do_edc_gds_workarounds(struct amdgpu_device *adev)
>      >>> +{
>      >>> +       struct amdgpu_ring *ring = &adev->gfx.compute_ring[0];
>      >>> +       int r;
>      >>> +
>      >>> +       r = amdgpu_ring_alloc(ring, 17);
>      >>> +       if (r) {
>      >>> +               DRM_ERROR("amdgpu: GDS workarounds failed to lock ring %s (%d).\n",
>      >>> +                       ring->name, r);
>      >>> +               return r;
>      >>> +       }
>      >>> +
>      >>> +       amdgpu_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
>      >>> +       amdgpu_ring_write(ring, WRITE_DATA_ENGINE_SEL(0) |
>      >>> +                          WRITE_DATA_DST_SEL(0));
>      >>> +       amdgpu_ring_write(ring, SOC15_REG_OFFSET(GC, 0, mmGDS_VMID0_SIZE));
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, 0x10000);
>      >> hardcoded size, please use the size from the driver.
>      >>
>      >>> +
>      >>> +       amdgpu_ring_write(ring, PACKET3(PACKET3_DMA_DATA, 5));
>      >>> +       amdgpu_ring_write(ring, (PACKET3_DMA_DATA_CP_SYNC |
>      >>> +                               PACKET3_DMA_DATA_DST_SEL(1) |
>      >>> +                               PACKET3_DMA_DATA_SRC_SEL(2) |
>      >>> +                               PACKET3_DMA_DATA_ENGINE(0)));
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, PACKET3_DMA_DATA_CMD_RAW_WAIT | 0x10000);
>      >> Instead of hardcoding the size, can you use the gds size from the
>      >> driver (adev->gds.gds_size).
>      > Hi Alex,
>      >
>      > Do you mean adev->gds.mem.total_size?
>      >
>      > But I see below operation in gfx_v9_0_ngg_init.
>      >
>      > adev->gds.mem.total_size -= ....
>      >
>      > Or you want me to add gds_size in struct amdgpu_gds?
>      >
>      > James
>      
>      Yeah, The amd-staging-drm-next branch has adev->gds.gds_size.
>      
>      James
>      
>      >
>      >> With that fixed:
>      >> Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
>      >>
>      >>> +
>      >>> +       amdgpu_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
>      >>> +       amdgpu_ring_write(ring, WRITE_DATA_ENGINE_SEL(0) |
>      >>> +                               WRITE_DATA_DST_SEL(0));
>      >>> +       amdgpu_ring_write(ring, SOC15_REG_OFFSET(GC, 0, mmGDS_VMID0_SIZE));
>      >>> +       amdgpu_ring_write(ring, 0);
>      >>> +       amdgpu_ring_write(ring, 0x0);
>      >>> +
>      >>> +       amdgpu_ring_commit(ring);
>      >>> +
>      >>> +       return 0;
>      >>> +}
>      >>> +
>      >>> +
>      >>>    static int gfx_v9_0_do_edc_gpr_workarounds(struct amdgpu_device *adev)
>      >>>    {
>      >>>           struct amdgpu_ring *ring = &adev->gfx.compute_ring[0];
>      >>> @@ -3810,6 +3854,10 @@ static int gfx_v9_0_ecc_late_init(void *handle)
>      >>>                   return 0;
>      >>>           }
>      >>>
>      >>> +       r = gfx_v9_0_do_edc_gds_workarounds(adev);
>      >>> +       if (r)
>      >>> +               return r;
>      >>> +
>      >>>           /* requires IBs so do in late init after IB pool is initialized */
>      >>>           r = gfx_v9_0_do_edc_gpr_workarounds(adev);
>      >>>           if (r)
>      >>> --
>      >>> 2.7.4
>      >>>
>      >>> _______________________________________________
>      >>> amd-gfx mailing list
>      >>> amd-gfx at lists.freedesktop.org
>      >>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>      
>
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