From e8110b1c9bdd3d76610a9783724233a570964d3c Mon Sep 17 00:00:00 2001 From: Christian König Date: Wed, 28 Jun 2017 13:43:48 +0200 Subject: drm/amdgpu: move ring helpers to amdgpu_ring.h MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Keep them where they belong. Signed-off-by: Christian König Reviewed-by: Alex Deucher Acked-by: Felix Kuehling --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 42 ++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index bc8dec992f73..04cbc3a4d4bf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -212,4 +212,46 @@ 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"); + return; + } + + 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 -- cgit v1.2.3-70-g09d2