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 struct msm_rbmemptrs { 27 volatile uint32_t rptr; 28 volatile uint32_t fence; 29 }; 30 31 struct msm_ringbuffer { 32 struct msm_gpu *gpu; 33 int id; 34 struct drm_gem_object *bo; 35 uint32_t *start, *end, *cur, *next; 36 struct list_head submits; 37 uint64_t iova; 38 uint32_t seqno; 39 uint32_t hangcheck_fence; 40 struct msm_rbmemptrs *memptrs; 41 uint64_t memptrs_iova; 42 struct msm_fence_context *fctx; 43 spinlock_t lock; 44 }; 45 46 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, 47 void *memptrs, uint64_t memptrs_iova); 48 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring); 49 50 /* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */ 51 52 static inline void 53 OUT_RING(struct msm_ringbuffer *ring, uint32_t data) 54 { 55 /* 56 * ring->next points to the current command being written - it won't be 57 * committed as ring->cur until the flush 58 */ 59 if (ring->next == ring->end) 60 ring->next = ring->start; 61 *(ring->next++) = data; 62 } 63 64 #endif /* __MSM_RINGBUFFER_H__ */ 65