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/* $XFree86$ */
/* $XdotOrg: driver/xf86-video-sisusb/src/sisusb_accel.c,v 1.6 2005/07/11 02:30:00 ajax Exp $ */
/*
* 2D Acceleration for SiS 315/USB - not functional!
*
* Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3) The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* Author: Thomas Winischhofer <thomas@winischhofer.net>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "sisusb.h"
#include "sisusb_regs.h"
#include "sisusb_accel.h"
/* VRAM queue acceleration specific */
#define SIS_WQINDEX(i) sis_accel_cmd_buffer[i]
#define SIS_RQINDEX(i) ((ULong)tt + 1) /* Bullshit, but we don't flush anyway */
static void
SiSUSBInitializeAccelerator(ScrnInfoPtr pScrn)
{
#ifndef SISVRAMQ
SISUSBPtr pSiSUSB = SISUSBPTR(pScrn);
if(pSiSUSB->ChipFlags & SiSCF_Integrated) {
CmdQueLen = 0;
} else {
CmdQueLen = ((128 * 1024) / 4) - 64;
}
#endif
}
Bool
SiSUSBAccelInit(ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
SISUSBPtr pSiSUSB = SISUSBPTR(pScrn);
int topFB, reservedFbSize, usableFbSize;
BoxRec Avail;
pSiSUSB->ColorExpandBufferNumber = 0;
pSiSUSB->PerColorExpandBufferSize = 0;
if((pScrn->bitsPerPixel != 8) &&
(pScrn->bitsPerPixel != 16) &&
(pScrn->bitsPerPixel != 32)) {
pSiSUSB->NoAccel = TRUE;
}
if(!pSiSUSB->NoAccel) {
SiSUSBInitializeAccelerator(pScrn);
}
/* Init framebuffer memory manager */
topFB = pSiSUSB->maxxfbmem;
reservedFbSize = pSiSUSB->ColorExpandBufferNumber * pSiSUSB->PerColorExpandBufferSize;
usableFbSize = topFB - reservedFbSize;
/* Layout:
* |--------------++++++++++++++++++++^************==========~~~~~~~~~~~~|
* UsableFbSize ColorExpandBuffers | DRI-Heap HWCursor CommandQueue
* topFB
*/
Avail.x1 = 0;
Avail.y1 = 0;
Avail.x2 = pScrn->displayWidth;
Avail.y2 = (usableFbSize / (pScrn->displayWidth * pScrn->bitsPerPixel/8)) - 1;
if(Avail.y2 < 0) Avail.y2 = 32767;
if(Avail.y2 < pScrn->currentMode->VDisplay) {
xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
"Not enough video RAM for accelerator. At least "
"%dKB needed, %ldKB available\n",
((((pScrn->displayWidth * pScrn->bitsPerPixel/8) /* +8 for make it sure */
* pScrn->currentMode->VDisplay) + reservedFbSize) / 1024) + 8,
pSiSUSB->maxxfbmem/1024);
pSiSUSB->NoAccel = TRUE;
pSiSUSB->NoXvideo = TRUE;
return FALSE; /* Don't even init fb manager */
}
xf86DrvMsg(pScrn->scrnIndex, X_INFO,
"Framebuffer from (%d,%d) to (%d,%d)\n",
Avail.x1, Avail.y1, Avail.x2 - 1, Avail.y2 - 1);
xf86InitFBManager(pScreen, &Avail);
return TRUE;
}
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