2 * Copyright (C) 2013 Red Hat
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #ifndef __MSM_RINGBUFFER_H__
19 #define __MSM_RINGBUFFER_H__
23 #define rbmemptr(ring, member) \
24 ((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member))
26 #define rbmemptr_stats(ring, index, member) \
27 (rbmemptr((ring), stats) + \
28 ((index) * sizeof(struct msm_gpu_submit_stats)) + \
29 offsetof(struct msm_gpu_submit_stats, member))
31 struct msm_gpu_submit_stats {
38 #define MSM_GPU_SUBMIT_STATS_COUNT 64
40 struct msm_rbmemptrs {
41 volatile uint32_t rptr;
42 volatile uint32_t fence;
44 volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
47 struct msm_ringbuffer {
50 struct drm_gem_object *bo;
51 uint32_t *start, *end, *cur, *next;
52 struct list_head submits;
55 uint32_t hangcheck_fence;
56 struct msm_rbmemptrs *memptrs;
57 uint64_t memptrs_iova;
58 struct msm_fence_context *fctx;
62 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
63 void *memptrs, uint64_t memptrs_iova);
64 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
66 /* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
69 OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
72 * ring->next points to the current command being written - it won't be
73 * committed as ring->cur until the flush
75 if (ring->next == ring->end)
76 ring->next = ring->start;
77 *(ring->next++) = data;
80 #endif /* __MSM_RINGBUFFER_H__ */