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/*
* Copyright ( C ) 2013 Red Hat
* Author : Rob Clark < robdclark @ gmail . com >
*
* This program is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation .
*
* This program is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License for
* more details .
*
* You should have received a copy of the GNU General Public License along with
* this program . If not , see < http : //www.gnu.org/licenses/>.
*/
# ifndef __MSM_RINGBUFFER_H__
# define __MSM_RINGBUFFER_H__
# include "msm_drv.h"
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# define rbmemptr(ring, member) \
( ( ring ) - > memptrs_iova + offsetof ( struct msm_rbmemptrs , member ) )
struct msm_rbmemptrs {
volatile uint32_t rptr ;
volatile uint32_t fence ;
} ;
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struct msm_ringbuffer {
struct msm_gpu * gpu ;
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int id ;
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struct drm_gem_object * bo ;
uint32_t * start , * end , * cur ;
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struct list_head submits ;
uint64_t iova ;
uint32_t seqno ;
uint32_t hangcheck_fence ;
struct msm_rbmemptrs * memptrs ;
uint64_t memptrs_iova ;
struct msm_fence_context * fctx ;
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} ;
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struct msm_ringbuffer * msm_ringbuffer_new ( struct msm_gpu * gpu , int id ,
void * memptrs , uint64_t memptrs_iova ) ;
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void msm_ringbuffer_destroy ( struct msm_ringbuffer * ring ) ;
/* ringbuffer helpers (the parts that are same for a3xx/a2xx/z180..) */
static inline void
OUT_RING ( struct msm_ringbuffer * ring , uint32_t data )
{
if ( ring - > cur = = ring - > end )
ring - > cur = ring - > start ;
* ( ring - > cur + + ) = data ;
}
# endif /* __MSM_RINGBUFFER_H__ */