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/*
* Copyright 2007 Nouveau Project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __NOUVEAU_DMA_H__
#define __NOUVEAU_DMA_H__
#include <string.h>
#include "nouveau_private.h"
//#define NOUVEAU_DMA_DEBUG
//#define NOUVEAU_DMA_TRACE
//#define NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF
#if defined(__amd64__)
#define NOUVEAU_DMA_BARRIER asm volatile("lock; addl $0,0(%%rsp)" ::: "memory")
#elif defined(__i386__)
#define NOUVEAU_DMA_BARRIER asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
#else
#define NOUVEAU_DMA_BARRIER
#endif
#define NOUVEAU_DMA_TIMEOUT 2000
#define NOUVEAU_TIME_MSEC() 0
#define RING_SKIPS 8
extern int nouveau_dma_wait(struct nouveau_channel *chan, unsigned size);
extern void nouveau_dma_subc_bind(struct nouveau_grobj *);
extern void nouveau_dma_channel_init(struct nouveau_channel *);
extern void nouveau_dma_kickoff(struct nouveau_channel *);
#ifdef NOUVEAU_DMA_DEBUG
static char faulty[1024];
#endif
static inline void
nouveau_dma_out(struct nouveau_channel *chan, uint32_t data)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_dma_priv *dma = nvchan->dma;
#ifdef NOUVEAU_DMA_DEBUG
if (dma->push_free == 0) {
printf("No space left in packet at %s\n", faulty);
return;
}
dma->push_free--;
#endif
#ifdef NOUVEAU_DMA_TRACE
{
uint32_t offset = (dma->cur << 2) + dma->base;
printf("\tOUT_RING %d/0x%08x -> 0x%08x\n",
nvchan->drm.channel, offset, data);
}
#endif
nvchan->pushbuf[dma->cur + (dma->base - nvchan->drm.put_base)/4] = data;
dma->cur++;
}
static inline void
nouveau_dma_outp(struct nouveau_channel *chan, uint32_t *ptr, int size)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_dma_priv *dma = nvchan->dma;
(void)dma;
#ifdef NOUVEAU_DMA_DEBUG
if (dma->push_free < size) {
printf("Packet too small. Free=%d, Need=%d\n",
dma->push_free, size);
return;
}
#endif
#ifdef NOUVEAU_DMA_TRACE
while (size--) {
nouveau_dma_out(chan, *ptr);
ptr++;
}
#else
memcpy(&nvchan->pushbuf[dma->cur], ptr, size << 2);
#ifdef NOUVEAU_DMA_DEBUG
dma->push_free -= size;
#endif
dma->cur += size;
#endif
}
static inline void
nouveau_dma_space(struct nouveau_channel *chan, unsigned size)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_dma_priv *dma = nvchan->dma;
if (dma->free < size) {
if (nouveau_dma_wait(chan, size) && chan->hang_notify)
chan->hang_notify(chan);
}
dma->free -= size;
#ifdef NOUVEAU_DMA_DEBUG
dma->push_free = size;
#endif
}
static inline void
nouveau_dma_begin(struct nouveau_channel *chan, struct nouveau_grobj *grobj,
int method, int size, const char* file, int line)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_dma_priv *dma = nvchan->dma;
(void)dma;
#ifdef NOUVEAU_DMA_TRACE
printf("BEGIN_RING %d/%08x/%d/0x%04x/%d\n", nvchan->drm.channel,
grobj->handle, grobj->subc, method, size);
#endif
#ifdef NOUVEAU_DMA_DEBUG
if (dma->push_free) {
printf("Previous packet incomplete: %d left at %s\n",
dma->push_free, faulty);
return;
}
sprintf(faulty,"%s:%d",file,line);
#endif
nouveau_dma_space(chan, (size + 1));
nouveau_dma_out(chan, (size << 18) | (grobj->subc << 13) | method);
}
#define RING_SPACE_CH(ch,sz) nouveau_dma_space((ch), (sz))
#define BEGIN_RING_CH(ch,gr,m,sz) nouveau_dma_begin((ch), (gr), (m), (sz), __FUNCTION__, __LINE__ )
#define OUT_RING_CH(ch, data) nouveau_dma_out((ch), (data))
#define OUT_RINGp_CH(ch,ptr,dwords) nouveau_dma_outp((ch), (void*)(ptr), \
(dwords))
#define FIRE_RING_CH(ch) nouveau_dma_kickoff((ch))
#define WAIT_RING_CH(ch,sz) nouveau_dma_wait((ch), (sz))
#endif
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