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/*
* Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
*
* 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, sub license,
* 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 (including the
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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.
*/
#include <X11/Xlibint.h>
#include <stdio.h>
#include "savageioctl.h"
#include "savagedma.h"
#include "savage_bci.h"
#include <time.h>
#include <unistd.h>
#if 0
/* flag =
0 return -1 if no available page
1 wait until a page be available */
static GLuint getDMAPage (savageContextPtr imesa, int flag) {
DMABufferPtr dmaBuff = &imesa->DMABuf;
GLuint page;
GLuint eventTag1;
if (dmaBuff->kickFlag == GL_FALSE)
return dmaBuff->usingPage;
page = dmaBuff->usingPage + 1;
/* overflow */
if (page >= (dmaBuff->buf->size * dmaBuff->buf->type)/DMA_PAGE_SIZE)
page = 0;
eventTag1 = GET_EVENTTAG;
if ( eventTag1 == page) { /* is kicking off */
if (flag == 1)
while (GET_EVENTTAG == page); /* FIXME: add a max loop count? */
else
return -1;
}
/* ok, that's it */
dmaBuff->usingPage = page;
dmaBuff->start = dmaBuff->end = dmaBuff->allocEnd =
(dmaBuff->buf->linear + DMA_PAGE_SIZE * page);
dmaBuff->kickFlag = GL_FALSE;
return page;
}
/* Allocate space in a real DMA buffer */
void *savageDMAAlloc (savageContextPtr imesa, GLuint size) {
DMABufferPtr dmaBuff = &imesa->DMABuf;
/* make sure that everything has been filled in and committed */
assert (dmaBuff->end == dmaBuff->allocEnd);
size *= sizeof (u_int32_t); /* size in bytes */
if (dmaBuff->kickFlag == GL_TRUE) {
if (size > DMA_PAGE_SIZE)
return NULL;
getDMAPage (imesa, 1);
} else if (dmaBuff->end + size >=
dmaBuff->buf->linear + DMA_PAGE_SIZE*(dmaBuff->usingPage+1)) {
/* need kick off */
savageDMAFlush (imesa);
getDMAPage (imesa, 1);
}
dmaBuff->allocEnd = dmaBuff->end + size;
return (void *)dmaBuff->end;
}
/* Flush DMA buffer via DMA */
void savageDMAFlush (savageContextPtr imesa) {
volatile u_int32_t* BCIbase;
DMABufferPtr dmaBuff = &imesa->DMABuf;
u_int32_t phyAddress;
GLuint dmaCount, dmaCount1, remain;
int i;
/* make sure that everything has been filled in and committed */
assert (dmaBuff->allocEnd == dmaBuff->end);
if (dmaBuff->kickFlag == GL_TRUE) /* has been kicked off? */
return;
if (dmaBuff->start == dmaBuff->end) /* no command? */
return;
/* get bci base */
BCIbase = (volatile u_int32_t *)SAVAGE_GET_BCI_POINTER(imesa,4);
/* set the eventtag */
*BCIbase = (dmaBuff->usingPage & 0xffffL) | (CMD_UpdateShadowStat << 27)
| (1 << 22);
*BCIbase = 0x96010051; /* set register x51*/
/* set the DMA buffer address */
phyAddress = (dmaBuff->buf->phyaddress + dmaBuff->usingPage*DMA_PAGE_SIZE)
& MDT_SRCADD_ALIGMENT;
if (dmaBuff->buf->location == DRM_SAVAGE_MEM_LOCATION_AGP)
*BCIbase = (phyAddress) | MDT_SRC_AGP;
else
*BCIbase = (phyAddress) | MDT_SRC_PCI;
/* pad with noops to multiple of 32 bytes */
dmaCount = (GLuint)(dmaBuff->end - dmaBuff->start);
dmaCount1 = (dmaCount + 31UL) & ~31UL;
remain = (dmaCount1 - dmaCount) >> 2;
for (i = 0; i < remain; i++) {
*((u_int32_t *)dmaBuff->end) = 0x40000000L;
dmaBuff->end+=4;
}
dmaCount = (dmaCount1 >> 3) - 1;
dmaBuff->allocEnd = dmaBuff->end;
/* kick off */
*BCIbase = (0xA8000000L)|dmaCount;
dmaBuff->kickFlag = GL_TRUE;
}
/* Init real DMA */
int savageDMAInit (savageContextPtr imesa)
{
DMABufferPtr dmaBuff = &imesa->DMABuf;
drm_savage_alloc_cont_mem_t * req;
int i;
long ret;
req = (drm_savage_alloc_cont_mem_t *)
malloc (sizeof(drm_savage_alloc_cont_mem_t));
if (!req)
return GL_FALSE;
req->type = DRM_SAVAGE_MEM_PAGE;
req->linear = 0;
/* try agp first */
req->phyaddress = imesa->sarea->agp_offset;
if (req->phyaddress) {
if (drmMap (imesa->driFd,
req->phyaddress,
DRM_SAVAGE_DMA_AGP_SIZE,
(drmAddressPtr)&req->linear) < 0) {
fprintf (stderr, "AGP map error.\n");
goto dma;
}
if (0) fprintf (stderr,"Using AGP dma|\n");
req->location = DRM_SAVAGE_MEM_LOCATION_AGP;
req->size = DRM_SAVAGE_DMA_AGP_SIZE/DRM_SAVAGE_MEM_PAGE;
}
dma:
if (!req->linear) {
req->size = DMA_BUFFER_SIZE/DRM_SAVAGE_MEM_PAGE;
for (i = 0; i < DMA_TRY_COUNT; i++) {
if ((ret = savageAllocDMABuffer (imesa, req)) != 0)
break;
req->size = req->size/2;
}
if (ret <= 0) {
fprintf(stderr, "Can't alloc DMA memory(system and agp)\n");
return GL_FALSE;
}
req->location = DRM_SAVAGE_MEM_LOCATION_PCI;
}
dmaBuff->buf = req;
dmaBuff->start = dmaBuff->end = dmaBuff->allocEnd = req->linear;
dmaBuff->usingPage = 0;
dmaBuff->kickFlag = GL_FALSE;
return GL_TRUE;
}
/* Close real DMA */
int savageDMAClose (savageContextPtr imesa)
{
DMABufferPtr dmaBuff = &imesa->DMABuf;
drm_savage_alloc_cont_mem_t * req = dmaBuff->buf;
if(req->location == DRM_SAVAGE_MEM_LOCATION_PCI)
savageFreeDMABuffer (imesa, req);
else { /* AGP memory */
drmUnmap ((drmAddress)req->linear, req->size*req->type);
drmRmMap (imesa->driFd, req->phyaddress);
}
free (req);
return GL_TRUE;
}
#endif
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