1 files changed, 371 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c b/nx-X11/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c
new file mode 100644
index 000000000..6a5c83db2
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c
@@ -0,0 +1,371 @@
+/*
+ * Abstraction of the AGP GART interface.
+ *
+ * This version is for both Linux and FreeBSD.
+ *
+ * Copyright © 2000 VA Linux Systems, Inc.
+ * Copyright © 2001 The XFree86 Project, Inc.
+ */
+
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c,v 3.11 2003/04/03 22:47:42 dawes Exp $ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <X11/X.h>
+#include "xf86.h"
+#include "xf86Priv.h"
+#include "xf86_OSlib.h"
+#include "xf86OSpriv.h"
+
+#if defined(linux)
+#include <asm/ioctl.h>
+#include <linux/agpgart.h>
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#include <sys/ioctl.h>
+#include <sys/agpio.h>
+#endif
+
+#ifndef AGP_DEVICE
+#define AGP_DEVICE		"/dev/agpgart"
+#endif
+/* AGP page size is independent of the host page size. */
+#ifndef AGP_PAGE_SIZE
+#define AGP_PAGE_SIZE		4096
+#endif
+#define AGPGART_MAJOR_VERSION	0
+#define AGPGART_MINOR_VERSION	99
+
+static int gartFd = -1;
+static int acquiredScreen = -1;
+static Bool initDone = FALSE;
+/*
+ * Close /dev/agpgart.  This frees all associated memory allocated during
+ * this server generation.
+ */
+Bool
+xf86GARTCloseScreen(int screenNum)
+{
+	if(gartFd != -1) {
+		close(gartFd);
+		acquiredScreen = -1;
+		gartFd = -1;
+		initDone = FALSE;
+	}
+	return TRUE;
+}
+
+/*
+ * Open /dev/agpgart.  Keep it open until xf86GARTCloseScreen is called.
+ */
+static Bool
+GARTInit(int screenNum)
+{
+	struct _agp_info agpinf;
+
+	if (initDone)
+		return (gartFd != -1);
+
+	initDone = TRUE;
+
+	if (gartFd == -1)
+		gartFd = open(AGP_DEVICE, O_RDWR, 0);
+	else
+		return FALSE;
+
+	if (gartFd == -1) {
+	    xf86DrvMsg(screenNum, X_ERROR,
+		"GARTInit: Unable to open " AGP_DEVICE " (%s)\n",
+		strerror(errno));
+	    return FALSE;
+	}
+
+	xf86AcquireGART(-1);
+	/* Check the kernel driver version. */
+	if (ioctl(gartFd, AGPIOC_INFO, &agpinf) != 0) {
+		xf86DrvMsg(screenNum, X_ERROR,
+			"GARTInit: AGPIOC_INFO failed (%s)\n", strerror(errno));
+		close(gartFd);
+		gartFd = -1;
+		return FALSE;
+	}
+	xf86ReleaseGART(-1);
+
+#if defined(linux)
+	/* Per Dave Jones, every effort will be made to keep the 
+	 * agpgart interface backwards compatible, so allow all 
+	 * future versions.
+	 */
+	if (
+#if (AGPGART_MAJOR_VERSION > 0) /* quiet compiler */
+	    agpinf.version.major < AGPGART_MAJOR_VERSION ||
+#endif
+	    (agpinf.version.major == AGPGART_MAJOR_VERSION &&
+	     agpinf.version.minor < AGPGART_MINOR_VERSION)) {
+		xf86DrvMsg(screenNum, X_ERROR,
+			"GARTInit: Kernel agpgart driver version is not current"
+			" (%d.%d vs %d.%d)\n",
+			agpinf.version.major, agpinf.version.minor,
+			AGPGART_MAJOR_VERSION, AGPGART_MINOR_VERSION);
+		close(gartFd);
+		gartFd = -1;
+		return FALSE;
+	}
+#endif
+	
+	return TRUE;
+}
+
+Bool
+xf86AgpGARTSupported()
+{
+	return GARTInit(-1);
+}
+
+AgpInfoPtr
+xf86GetAGPInfo(int screenNum)
+{
+	struct _agp_info agpinf;
+	AgpInfoPtr info;
+
+	if (!GARTInit(screenNum))
+		return NULL;
+
+
+	if ((info = xcalloc(sizeof(AgpInfo), 1)) == NULL) {
+		xf86DrvMsg(screenNum, X_ERROR,
+			   "xf86GetAGPInfo: Failed to allocate AgpInfo\n");
+		return NULL;
+	}
+
+	memset((char*)&agpinf, 0, sizeof(agpinf));
+
+	if (ioctl(gartFd, AGPIOC_INFO, &agpinf) != 0) {
+		xf86DrvMsg(screenNum, X_ERROR,
+			   "xf86GetAGPInfo: AGPIOC_INFO failed (%s)\n",
+			   strerror(errno));
+		return NULL;
+	}
+
+	info->bridgeId = agpinf.bridge_id;
+	info->agpMode = agpinf.agp_mode;
+	info->base = agpinf.aper_base;
+	info->size = agpinf.aper_size;
+	info->totalPages = agpinf.pg_total;
+	info->systemPages = agpinf.pg_system;
+	info->usedPages = agpinf.pg_used;
+
+	xf86DrvMsg(screenNum, X_INFO, "Kernel reported %d total, %d used\n", agpinf.pg_total, agpinf.pg_used);
+
+	return info;
+}
+
+/*
+ * XXX If multiple screens can acquire the GART, should we have a reference
+ * count instead of using acquiredScreen?
+ */
+
+Bool
+xf86AcquireGART(int screenNum)
+{
+	if (screenNum != -1 && !GARTInit(screenNum))
+		return FALSE;
+
+	if (screenNum == -1 || acquiredScreen != screenNum) {
+		if (ioctl(gartFd, AGPIOC_ACQUIRE, 0) != 0) {
+			xf86DrvMsg(screenNum, X_WARNING,
+				"xf86AcquireGART: AGPIOC_ACQUIRE failed (%s)\n",
+				strerror(errno));
+			return FALSE;
+		}
+		acquiredScreen = screenNum;
+	}
+	return TRUE;
+}
+
+Bool
+xf86ReleaseGART(int screenNum)
+{
+	if (screenNum != -1 && !GARTInit(screenNum))
+		return FALSE;
+
+	if (acquiredScreen == screenNum) {
+		/*
+		 * The FreeBSD agp driver removes allocations on release.
+		 * The Linux driver doesn't.  xf86ReleaseGART() is expected
+		 * to give up access to the GART, but not to remove any
+		 * allocations.
+		 */
+#if !defined(linux)
+	    if (screenNum == -1)
+#endif
+	    {
+		if (ioctl(gartFd, AGPIOC_RELEASE, 0) != 0) {
+			xf86DrvMsg(screenNum, X_WARNING,
+				"xf86ReleaseGART: AGPIOC_RELEASE failed (%s)\n",
+				strerror(errno));
+			return FALSE;
+		}
+		acquiredScreen = -1;
+	    }
+	    return TRUE;
+	}
+	return FALSE;
+}
+
+int
+xf86AllocateGARTMemory(int screenNum, unsigned long size, int type,
+			unsigned long *physical)
+{
+	struct _agp_allocate alloc;
+	int pages;
+
+	/*
+	 * Allocates "size" bytes of GART memory (rounds up to the next
+	 * page multiple) or type "type".  A handle (key) for the allocated
+	 * memory is returned.  On error, the return value is -1.
+	 */
+
+	if (!GARTInit(screenNum) || acquiredScreen != screenNum)
+		return -1;
+
+	pages = (size / AGP_PAGE_SIZE);
+	if (size % AGP_PAGE_SIZE != 0)
+		pages++;
+
+	/* XXX check for pages == 0? */
+
+	alloc.pg_count = pages;
+	alloc.type = type;
+
+	if (ioctl(gartFd, AGPIOC_ALLOCATE, &alloc) != 0) {
+		xf86DrvMsg(screenNum, X_WARNING, "xf86AllocateGARTMemory: "
+			   "allocation of %d pages failed\n\t(%s)\n", pages,
+			   strerror(errno));
+		return -1;
+	}
+
+	if (physical)
+		*physical = alloc.physical;
+
+	return alloc.key;
+}
+
+Bool
+xf86DeallocateGARTMemory(int screenNum, int key)
+{
+	if (!GARTInit(screenNum) || acquiredScreen != screenNum)
+		return FALSE;
+
+	if (acquiredScreen != screenNum) {
+		xf86DrvMsg(screenNum, X_ERROR,
+                   "xf86UnbindGARTMemory: AGP not acquired by this screen\n");
+		return FALSE;
+	}
+
+	if (ioctl(gartFd, AGPIOC_DEALLOCATE, (int *)key) != 0) {
+		xf86DrvMsg(screenNum, X_WARNING,"xf86DeAllocateGARTMemory: "
+                   "deallocation gart memory with key %d failed\n\t(%s)\n",
+                   key, strerror(errno));
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+/* Bind GART memory with "key" at "offset" */
+Bool
+xf86BindGARTMemory(int screenNum, int key, unsigned long offset)
+{
+	struct _agp_bind bind;
+	int pageOffset;
+
+	if (!GARTInit(screenNum) || acquiredScreen != screenNum)
+		return FALSE;
+
+	if (acquiredScreen != screenNum) {
+		xf86DrvMsg(screenNum, X_ERROR,
+		      "xf86BindGARTMemory: AGP not acquired by this screen\n");
+		return FALSE;
+	}
+
+	if (offset % AGP_PAGE_SIZE != 0) {
+		xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: "
+			   "offset (0x%lx) is not page-aligned (%d)\n",
+			   offset, AGP_PAGE_SIZE);
+		return FALSE;
+	}
+	pageOffset = offset / AGP_PAGE_SIZE;
+
+	xf86DrvMsgVerb(screenNum, X_INFO, 3,
+		       "xf86BindGARTMemory: bind key %d at 0x%08lx "
+		       "(pgoffset %d)\n", key, offset, pageOffset);
+
+	bind.pg_start = pageOffset;
+	bind.key = key;
+
+	if (ioctl(gartFd, AGPIOC_BIND, &bind) != 0) {
+		xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: "
+			   "binding of gart memory with key %d\n"
+			   "\tat offset 0x%lx failed (%s)\n",
+			   key, offset, strerror(errno));
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+
+/* Unbind GART memory with "key" */
+Bool
+xf86UnbindGARTMemory(int screenNum, int key)
+{
+	struct _agp_unbind unbind;
+
+	if (!GARTInit(screenNum) || acquiredScreen != screenNum)
+		return FALSE;
+
+	if (acquiredScreen != screenNum) {
+		xf86DrvMsg(screenNum, X_ERROR,
+		    "xf86UnbindGARTMemory: AGP not acquired by this screen\n");
+		return FALSE;
+	}
+
+	unbind.priority = 0;
+	unbind.key = key;
+
+	if (ioctl(gartFd, AGPIOC_UNBIND, &unbind) != 0) {
+		xf86DrvMsg(screenNum, X_WARNING, "xf86UnbindGARTMemory: "
+			   "unbinding of gart memory with key %d "
+			   "failed (%s)\n", key, strerror(errno));
+		return FALSE;
+	}
+
+	xf86DrvMsgVerb(screenNum, X_INFO, 3,
+		       "xf86UnbindGARTMemory: unbind key %d\n", key);
+
+	return TRUE;
+}
+
+
+/* XXX Interface may change. */
+Bool
+xf86EnableAGP(int screenNum, CARD32 mode)
+{
+	agp_setup setup;
+
+	if (!GARTInit(screenNum) || acquiredScreen != screenNum)
+		return FALSE;
+
+	setup.agp_mode = mode;
+	if (ioctl(gartFd, AGPIOC_SETUP, &setup) != 0) {
+		xf86DrvMsg(screenNum, X_WARNING, "xf86EnableAGP: "
+			   "AGPIOC_SETUP with mode %ld failed (%s)\n",
+			   (unsigned long)mode, strerror(errno));
+		return FALSE;
+	}
+
+	return TRUE;
+}
+