94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#ifndef __MSM_RINGBUFFER_H__
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#define __MSM_RINGBUFFER_H__
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#include "drm/gpu_scheduler.h"
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#include "msm_drv.h"
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#define rbmemptr(ring, member) \
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((ring)->memptrs_iova + offsetof(struct msm_rbmemptrs, member))
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#define rbmemptr_stats(ring, index, member) \
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(rbmemptr((ring), stats) + \
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((index) * sizeof(struct msm_gpu_submit_stats)) + \
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offsetof(struct msm_gpu_submit_stats, member))
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struct msm_gpu_submit_stats {
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u64 cpcycles_start;
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u64 cpcycles_end;
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u64 alwayson_start;
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u64 alwayson_end;
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};
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#define MSM_GPU_SUBMIT_STATS_COUNT 64
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struct msm_rbmemptrs {
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volatile uint32_t rptr;
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volatile uint32_t fence;
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volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
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volatile u64 ttbr0;
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};
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struct msm_ringbuffer {
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struct msm_gpu *gpu;
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int id;
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struct drm_gem_object *bo;
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uint32_t *start, *end, *cur, *next;
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/*
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* The job scheduler for this ring.
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*/
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struct drm_gpu_scheduler sched;
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/*
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* List of in-flight submits on this ring. Protected by submit_lock.
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*
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* Currently just submits that are already written into the ring, not
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* submits that are still in drm_gpu_scheduler's queues. At a later
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* step we could probably move to letting drm_gpu_scheduler manage
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* hangcheck detection and keep track of submit jobs that are in-
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* flight.
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*/
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struct list_head submits;
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spinlock_t submit_lock;
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uint64_t iova;
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uint32_t seqno;
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uint32_t hangcheck_fence;
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struct msm_rbmemptrs *memptrs;
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uint64_t memptrs_iova;
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struct msm_fence_context *fctx;
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/*
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* preempt_lock protects preemption and serializes wptr updates against
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* preemption. Can be aquired from irq context.
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*/
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spinlock_t preempt_lock;
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};
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struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
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void *memptrs, uint64_t memptrs_iova);
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void msm_ringbuffer_destroy(struct msm_ringbuffer *ring);
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/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
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static inline void
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OUT_RING(struct msm_ringbuffer *ring, uint32_t data)
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{
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/*
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* ring->next points to the current command being written - it won't be
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* committed as ring->cur until the flush
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*/
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if (ring->next == ring->end)
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ring->next = ring->start;
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*(ring->next++) = data;
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}
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#endif /* __MSM_RINGBUFFER_H__ */
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