diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c index dcd9b4a8e20b..725a9c73d51f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c @@ -205,3 +205,46 @@ restart_ih: return IRQ_HANDLED; } +/** + * amdgpu_ih_decode_iv_helper - decode an interrupt vector + * + * @adev: amdgpu_device pointer + * + * Decodes the interrupt vector at the current rptr + * position and also advance the position for for Vega10 + * and later GPUs. + */ +void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev, + struct amdgpu_ih_ring *ih, + struct amdgpu_iv_entry *entry) +{ + /* wptr/rptr are in bytes! */ + u32 ring_index = ih->rptr >> 2; + uint32_t dw[8]; + + dw[0] = le32_to_cpu(ih->ring[ring_index + 0]); + dw[1] = le32_to_cpu(ih->ring[ring_index + 1]); + dw[2] = le32_to_cpu(ih->ring[ring_index + 2]); + dw[3] = le32_to_cpu(ih->ring[ring_index + 3]); + dw[4] = le32_to_cpu(ih->ring[ring_index + 4]); + dw[5] = le32_to_cpu(ih->ring[ring_index + 5]); + dw[6] = le32_to_cpu(ih->ring[ring_index + 6]); + dw[7] = le32_to_cpu(ih->ring[ring_index + 7]); + + entry->client_id = dw[0] & 0xff; + entry->src_id = (dw[0] >> 8) & 0xff; + entry->ring_id = (dw[0] >> 16) & 0xff; + entry->vmid = (dw[0] >> 24) & 0xf; + entry->vmid_src = (dw[0] >> 31); + entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32); + entry->timestamp_src = dw[2] >> 31; + entry->pasid = dw[3] & 0xffff; + entry->pasid_src = dw[3] >> 31; + entry->src_data[0] = dw[4]; + entry->src_data[1] = dw[5]; + entry->src_data[2] = dw[6]; + entry->src_data[3] = dw[7]; + + /* wptr/rptr are in bytes! */ + ih->rptr += 32; +} |