327 lines
8.7 KiB
C
327 lines
8.7 KiB
C
/*
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* Abstraction of the AGP GART interface.
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*
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* This version is for Solaris.
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*
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* Copyright © 2000 VA Linux Systems, Inc.
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* Copyright © 2001 The XFree86 Project, Inc.
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*/
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/* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include "xf86_OSproc.h"
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#include <unistd.h>
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#include <sys/ioccom.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/agpgart.h>
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/* AGP page size is independent of the host page size. */
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#ifndef AGP_PAGE_SIZE
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#define AGP_PAGE_SIZE 4096
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#endif
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static int gartFd = -1;
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static int acquiredScreen = -1;
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static Bool initDone = FALSE;
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/*
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* Close /dev/agpgart. This frees all associated memory allocated during
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* this server generation.
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*/
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Bool
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xf86GARTCloseScreen(int screenNum)
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{
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if (gartFd != -1) {
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close(gartFd);
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acquiredScreen = -1;
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gartFd = -1;
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initDone = FALSE;
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xf86DrvMsg(screenNum, X_INFO,
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"xf86GARTCloseScreen: device closed successfully\n");
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}
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return TRUE;
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}
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/*
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* Open /dev/agpgart. Keep it open until xf86GARTCloseScreen is called.
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*/
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static Bool
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GARTInit(int screenNum)
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{
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if (initDone)
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return gartFd != -1;
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if (gartFd == -1)
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gartFd = open(AGP_DEVICE, O_RDWR);
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else
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return FALSE;
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if (gartFd == -1) {
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xf86DrvMsg(screenNum, X_ERROR,
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"GARTInit: Unable to open " AGP_DEVICE " (%s)\n",
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strerror(errno));
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return FALSE;
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}
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initDone = TRUE;
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xf86DrvMsg(screenNum, X_INFO,
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"GARTInit: " AGP_DEVICE " opened successfully\n");
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return TRUE;
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}
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Bool
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xf86AgpGARTSupported(void)
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{
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return (GARTInit(-1));
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}
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AgpInfoPtr
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xf86GetAGPInfo(int screenNum)
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{
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agp_info_t agpinf;
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AgpInfoPtr info;
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if (!GARTInit(screenNum))
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return NULL;
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if (ioctl(gartFd, AGPIOC_INFO, &agpinf) != 0) {
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xf86DrvMsg(screenNum, X_ERROR,
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"xf86GetAGPInfo: AGPIOC_INFO failed (%s)\n",
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strerror(errno));
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return NULL;
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}
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if ((info = calloc(sizeof(AgpInfo), 1)) == NULL) {
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xf86DrvMsg(screenNum, X_ERROR,
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"xf86GetAGPInfo: Failed to allocate AgpInfo\n");
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return NULL;
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}
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info->bridgeId = agpinf.agpi_devid;
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info->agpMode = agpinf.agpi_mode;
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info->base = agpinf.agpi_aperbase;
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info->size = agpinf.agpi_apersize;
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info->totalPages = (unsigned long) agpinf.agpi_pgtotal;
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info->systemPages = (unsigned long) agpinf.agpi_pgsystem;
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info->usedPages = (unsigned long) agpinf.agpi_pgused;
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return info;
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}
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Bool
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xf86AcquireGART(int screenNum)
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{
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if (!GARTInit(screenNum))
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return FALSE;
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if (acquiredScreen != screenNum) {
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if (ioctl(gartFd, AGPIOC_ACQUIRE, 0) != 0) {
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xf86DrvMsg(screenNum, X_WARNING,
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"xf86AcquireGART: AGPIOC_ACQUIRE failed (%s)\n",
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strerror(errno));
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return FALSE;
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}
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acquiredScreen = screenNum;
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xf86DrvMsg(screenNum, X_INFO,
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"xf86AcquireGART: AGPIOC_ACQUIRE succeeded\n");
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}
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return TRUE;
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}
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Bool
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xf86ReleaseGART(int screenNum)
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{
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if (!GARTInit(screenNum))
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return FALSE;
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if (acquiredScreen == screenNum) {
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/*
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* The FreeBSD agp driver removes allocations on release.
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* The Solaris driver doesn't. xf86ReleaseGART() is expected
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* to give up access to the GART, but not to remove any
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* allocations.
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*/
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if (ioctl(gartFd, AGPIOC_RELEASE, 0) != 0) {
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xf86DrvMsg(screenNum, X_WARNING,
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"xf86ReleaseGART: AGPIOC_RELEASE failed (%s)\n",
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strerror(errno));
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return FALSE;
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}
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acquiredScreen = -1;
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xf86DrvMsg(screenNum, X_INFO,
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"xf86ReleaseGART: AGPIOC_RELEASE succeeded\n");
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return TRUE;
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}
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return FALSE;
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}
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int
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xf86AllocateGARTMemory(int screenNum, unsigned long size, int type,
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unsigned long *physical)
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{
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agp_allocate_t alloc;
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int pages;
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/*
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* Allocates "size" bytes of GART memory (rounds up to the next
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* page multiple) or type "type". A handle (key) for the allocated
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* memory is returned. On error, the return value is -1.
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* "size" should be larger than 0, or AGPIOC_ALLOCATE ioctl will
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* return error.
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*/
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if (!GARTInit(screenNum) || (acquiredScreen != screenNum))
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return -1;
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pages = (size / AGP_PAGE_SIZE);
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if (size % AGP_PAGE_SIZE != 0)
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pages++;
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alloc.agpa_pgcount = pages;
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alloc.agpa_type = type;
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if (ioctl(gartFd, AGPIOC_ALLOCATE, &alloc) != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86AllocateGARTMemory: "
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"allocation of %d pages failed\n\t(%s)\n", pages,
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strerror(errno));
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return -1;
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}
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if (physical)
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*physical = (unsigned long) alloc.agpa_physical;
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return alloc.agpa_key;
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}
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Bool
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xf86DeallocateGARTMemory(int screenNum, int key)
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{
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if (!GARTInit(screenNum) || (acquiredScreen != screenNum))
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return FALSE;
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if (ioctl(gartFd, AGPIOC_DEALLOCATE, (int *) (uintptr_t) key) != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86DeAllocateGARTMemory: "
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"deallocation of gart memory with key %d failed\n"
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"\t(%s)\n", key, strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/* Bind GART memory with "key" at "offset" */
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Bool
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xf86BindGARTMemory(int screenNum, int key, unsigned long offset)
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{
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agp_bind_t bind;
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int pageOffset;
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if (!GARTInit(screenNum) || (acquiredScreen != screenNum))
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return FALSE;
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if (offset % AGP_PAGE_SIZE != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: "
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"offset (0x%lx) is not page-aligned (%d)\n",
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offset, AGP_PAGE_SIZE);
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return FALSE;
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}
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pageOffset = offset / AGP_PAGE_SIZE;
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xf86DrvMsgVerb(screenNum, X_INFO, 3,
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"xf86BindGARTMemory: bind key %d at 0x%08lx "
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"(pgoffset %d)\n", key, offset, pageOffset);
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bind.agpb_pgstart = pageOffset;
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bind.agpb_key = key;
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if (ioctl(gartFd, AGPIOC_BIND, &bind) != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: "
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"binding of gart memory with key %d\n"
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"\tat offset 0x%lx failed (%s)\n",
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key, offset, strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/* Unbind GART memory with "key" */
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Bool
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xf86UnbindGARTMemory(int screenNum, int key)
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{
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agp_unbind_t unbind;
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if (!GARTInit(screenNum) || (acquiredScreen != screenNum))
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return FALSE;
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unbind.agpu_pri = 0;
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unbind.agpu_key = key;
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if (ioctl(gartFd, AGPIOC_UNBIND, &unbind) != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86UnbindGARTMemory: "
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"unbinding of gart memory with key %d "
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"failed (%s)\n", key, strerror(errno));
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return FALSE;
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}
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xf86DrvMsgVerb(screenNum, X_INFO, 3,
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"xf86UnbindGARTMemory: unbind key %d\n", key);
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return TRUE;
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}
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/* XXX Interface may change. */
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Bool
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xf86EnableAGP(int screenNum, CARD32 mode)
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{
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agp_setup_t setup;
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if (!GARTInit(screenNum) || (acquiredScreen != screenNum))
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return FALSE;
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setup.agps_mode = mode;
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if (ioctl(gartFd, AGPIOC_SETUP, &setup) != 0) {
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xf86DrvMsg(screenNum, X_WARNING, "xf86EnableAGP: "
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"AGPIOC_SETUP with mode %x failed (%s)\n",
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(unsigned int) mode, strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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