Change-Id: Ib9105e5f0e1183ae92e647db64244077a86642a4
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index e9983fb..b8523f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1599,6 +1599,37 @@ static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
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 (ring->count_dw < count_dw) {
+ DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
+ } else {
+ occupied = ring->wptr & ring->ptr_mask;
+ dst = (void *)&ring->ring[occupied];
+ chunk1 = ring->ptr_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;
+ }
+}
+
static inline struct amdgpu_sdma_instance *
amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
{
--
2.7.4
