root/drivers/gpu/drm/msm/msm_ringbuffer.h

INCLUDED FROM

DEFINITIONS

1. OUT_RING

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  */
   6 
   7 #ifndef __MSM_RINGBUFFER_H__
   8 #define __MSM_RINGBUFFER_H__
   9 
  10 #include "msm_drv.h"
  11 
  12 #define rbmemptr(ring, member)  \
  13         ((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member))
  14 
  15 #define rbmemptr_stats(ring, index, member) \
  16         (rbmemptr((ring), stats) + \
  17          ((index) * sizeof(struct msm_gpu_submit_stats)) + \
  18          offsetof(struct msm_gpu_submit_stats, member))
  19 
  20 struct msm_gpu_submit_stats {
  21         u64 cpcycles_start;
  22         u64 cpcycles_end;
  23         u64 alwayson_start;
  24         u64 alwayson_end;
  25 };
  26 
  27 #define MSM_GPU_SUBMIT_STATS_COUNT 64
  28 
  29 struct msm_rbmemptrs {
  30         volatile uint32_t rptr;
  31         volatile uint32_t fence;
  32 
  33         volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
  34 };
  35 
  36 struct msm_ringbuffer {
  37         struct msm_gpu *gpu;
  38         int id;
  39         struct drm_gem_object *bo;
  40         uint32_t *start, *end, *cur, *next;
  41         struct list_head submits;
  42         uint64_t iova;
  43         uint32_t seqno;
  44         uint32_t hangcheck_fence;
  45         struct msm_rbmemptrs *memptrs;
  46         uint64_t memptrs_iova;
  47         struct msm_fence_context *fctx;
  48         spinlock_t lock;
  49 };
  50 
  51 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
  52                 void *memptrs, uint64_t memptrs_iova);
  53 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
  54 
  55 /* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
  56 
  57 static inline void
  58 OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
  59 {
  60         /*
  61          * ring->next points to the current command being written - it won't be
  62          * committed as ring->cur until the flush
  63          */
  64         if (ring->next == ring->end)
  65                 ring->next = ring->start;
  66         *(ring->next++) = data;
  67 }
  68 
  69 #endif /* __MSM_RINGBUFFER_H__ */