1 /* 2 * Copyright (C) 2013 Red Hat 3 * Author: Rob Clark <robdclark@gmail.com> 4 * 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. 8 * 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 12 * more details. 13 * 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/>. 16 */ 17 18 #ifndef __MSM_RINGBUFFER_H__ 19 #define __MSM_RINGBUFFER_H__ 20 21 #include "msm_drv.h" 22 23 #define rbmemptr(ring, member) \ 24 ((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member)) 25 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)) 30 31 struct msm_gpu_submit_stats { 32 u64 cpcycles_start; 33 u64 cpcycles_end; 34 u64 alwayson_start; 35 u64 alwayson_end; 36 }; 37 38 #define MSM_GPU_SUBMIT_STATS_COUNT 64 39 40 struct msm_rbmemptrs { 41 volatile uint32_t rptr; 42 volatile uint32_t fence; 43 44 volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT]; 45 }; 46 47 struct msm_ringbuffer { 48 struct msm_gpu *gpu; 49 int id; 50 struct drm_gem_object *bo; 51 uint32_t *start, *end, *cur, *next; 52 struct list_head submits; 53 uint64_t iova; 54 uint32_t seqno; 55 uint32_t hangcheck_fence; 56 struct msm_rbmemptrs *memptrs; 57 uint64_t memptrs_iova; 58 struct msm_fence_context *fctx; 59 spinlock_t lock; 60 }; 61 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); 65 66 /* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */ 67 68 static inline void 69 OUT_RING(struct msm_ringbuffer *ring, uint32_t data) 70 { 71 /* 72 * ring->next points to the current command being written - it won't be 73 * committed as ring->cur until the flush 74 */ 75 if (ring->next == ring->end) 76 ring->next = ring->start; 77 *(ring->next++) = data; 78 } 79 80 #endif /* __MSM_RINGBUFFER_H__ */ 81