diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index 61e30de1977b..49df2c4745a1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -488,6 +488,25 @@ static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring) memset32(ring->ring, ring->funcs->nop, ring->buf_mask + 1); } +static inline void amdgpu_ring_clear_ring_and_ptrs(struct amdgpu_ring *ring) +{ + /* Clear the contents of the ring. */ + amdgpu_ring_clear_ring(ring); + + /* Clear the ring pointers on the CPU. */ + ring->wptr = 0; + + /* + * Clear the ring pointers allocated in writeback. + * + * Note: we always allocate 64 bits for these pointers, + * but older HW generations only use the lower 32 bits. + * Use 64-bit atomics for simplicity. + */ + atomic64_set((atomic64_t *)ring->wptr_cpu_addr, 0); + atomic64_set((atomic64_t *)ring->rptr_cpu_addr, 0); +} + static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v) { ring->ring[ring->wptr++ & ring->buf_mask] = v; |