diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index bc8dec992f73..322d25299a00 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -212,4 +212,44 @@ static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring) } +static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v) +{ + if (ring->count_dw <= 0) + DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n"); + ring->ring[ring->wptr++ & ring->buf_mask] = v; + ring->wptr &= ring->ptr_mask; + ring->count_dw--; +} + +static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring, + void *src, int count_dw) +{ + unsigned occupied, chunk1, chunk2; + void *dst; + + if (unlikely(ring->count_dw < count_dw)) + DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n"); + + occupied = ring->wptr & ring->buf_mask; + dst = (void *)&ring->ring[occupied]; + chunk1 = ring->buf_mask + 1 - occupied; + chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1; + chunk2 = count_dw - chunk1; + chunk1 <<= 2; + chunk2 <<= 2; + + if (chunk1) + memcpy(dst, src, chunk1); + + if (chunk2) { + src += chunk1; + dst = (void *)ring->ring; + memcpy(dst, src, chunk2); + } + + ring->wptr += count_dw; + ring->wptr &= ring->ptr_mask; + ring->count_dw -= count_dw; +} + #endif |