Lines Matching defs:head
379 int head, tail;
638 ring->head = ring_read(ring, _RING_HEAD) & HEAD_ADDR;
642 if (ring->tail == ring->head)
645 full = ring->tail - ring->head;
877 u32 tail, head;
878 head = I915_READ_HEAD(ring) & HEAD_ADDR;
882 DRM_ERROR("HEAD 0x%x TAIL 0x%x", head, tail);
885 if (head == tail)
889 virt = (unsigned int *)((intptr_t)ring->virtual_start + head + (i-180)*4);
890 DRM_ERROR("%s[0x%x]: 0x%x", ring->name, head + (i-180)*4, virt[0]);