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| author | Dave Airlie <airlied@redhat.com> | 2020-12-10 07:55:41 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2020-12-10 07:55:53 +0100 |
| commit | b10733527bfd864605c33ab2e9a886eec317ec39 (patch) | |
| tree | d7d671d2fa69e628e2ac898ba8e9ab10c6481c3c /drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | |
| parent | Merge tag 'drm-msm-next-2020-12-07' of https://gitlab.freedesktop.org/drm/msm... (diff) | |
| parent | drm/amdgpu: Initialise drm_gem_object_funcs for imported BOs (diff) | |
| download | linux-b10733527bfd864605c33ab2e9a886eec317ec39.tar.xz linux-b10733527bfd864605c33ab2e9a886eec317ec39.zip | |
Merge tag 'amd-drm-next-5.11-2020-12-09' of git://people.freedesktop.org/~agd5f/linux into drm-next
amd-drm-next-5.11-2020-12-09:
amdgpu:
- SR-IOV fixes
- Navy Flounder updates
- Sienna Cichlid updates
- Dimgrey Cavefish updates
- Vangogh updates
- Misc SMU fixes
- Misc display fixes
- Last big hunk of W=1 warning fixes
- Cursor validation fixes
- CI BACO updates
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201210045344.21566-1-alexander.deucher@amd.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c index 111a301ce878..dcd9b4a8e20b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c @@ -132,6 +132,35 @@ void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) } /** + * amdgpu_ih_ring_write - write IV to the ring buffer + * + * @ih: ih ring to write to + * @iv: the iv to write + * @num_dw: size of the iv in dw + * + * Writes an IV to the ring buffer using the CPU and increment the wptr. + * Used for testing and delegating IVs to a software ring. + */ +void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv, + unsigned int num_dw) +{ + uint32_t wptr = le32_to_cpu(*ih->wptr_cpu) >> 2; + unsigned int i; + + for (i = 0; i < num_dw; ++i) + ih->ring[wptr++] = cpu_to_le32(iv[i]); + + wptr <<= 2; + wptr &= ih->ptr_mask; + + /* Only commit the new wptr if we don't overflow */ + if (wptr != READ_ONCE(ih->rptr)) { + wmb(); + WRITE_ONCE(*ih->wptr_cpu, cpu_to_le32(wptr)); + } +} + +/** * amdgpu_ih_process - interrupt handler * * @adev: amdgpu_device pointer |