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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b1fc2839d2
Implement preemption for A5XX targets - this allows multiple ringbuffers for different priorities with automatic preemption of a lower priority ringbuffer if a higher one is ready. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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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 "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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struct msm_rbmemptrs {
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volatile uint32_t rptr;
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volatile uint32_t fence;
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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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struct list_head submits;
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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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spinlock_t 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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