diff options
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/sco/sco_video.c')
| -rw-r--r-- | xorg-server/hw/xfree86/os-support/sco/sco_video.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/sco/sco_video.c b/xorg-server/hw/xfree86/os-support/sco/sco_video.c new file mode 100644 index 000000000..7edf71db3 --- /dev/null +++ b/xorg-server/hw/xfree86/os-support/sco/sco_video.c @@ -0,0 +1,294 @@ +/* + * Copyright 2001 by J. Kean Johnston <jkj@sco.com> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name J. Kean Johnston not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. J. Kean Johnston makes no + * representations about the suitability of this software for any purpose. + * It is provided "as is" without express or implied warranty. + * + * J. KEAN JOHNSTON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL J. KEAN JOHNSTON BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF + * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* Re-written May 2001 to represent the current state of reality */ + +/* + * This file contains the completely re-written SCO OpenServer video + * routines for XFree86 4.x. Much of this is based on the SCO X server + * code (which is an X11R5 server) and will probably only work on + * OpenServer versions 5.0.5, 5.0.6 and later. Please send me (jkj@sco.com) + * email if you have any questions. + * + * Ideally, you should use OSR5.0.6A or later, with the updated console + * driver for 5.0.6A (its the default driver in 5.0.7 and later). + * However, if you are running on an older system, this code will detect + * that and adjust accordingly. + */ + +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include <X11/X.h> +#include "input.h" +#include "scrnintstr.h" + +#define _NEED_SYSI86 +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86OSpriv.h" +#include "xf86_OSlib.h" + +#include <sys/ci/ciioctl.h> +#define MPXNAME "/dev/atp1" +#define BASECPU 1 + +Bool mpxLock = TRUE; + +#define USE_VASMETHOD 1 + +/***************************************************************************/ +/* Video Memory Mapping section */ +/***************************************************************************/ + +static int sco_mcdone = 0, sco_ismc = 0; + +/***************************************************************************/ +/* + * To map the video memory, we first need to see if we are on a multi-console + * system. If we are, we need to try to use an existing video class in the + * kernel. We do this by retrieving the list of currently defined classes + * (via the new CONS_GETCLASS ioctl()) to see if we have a class that will + * match the range of memory we desire. If we can't find one, we have an + * error and we abort. + * + * If we are not using a multi-console, we can simply use mmap() to map in + * the frame buffer, using the classs-access method as a fall-back only if + * the mmap() fails (it shouldn't). We always set the appropriate pointers + * in the config structure to point ot the right function to map and unmap + * the video memory. An alternative to using mmap() is to use the new + * CONS_ADDVAS call, which will use vasmalloc() and vasbind() in the kernel + * to map the physical address to a virtual one, which it then returns. + * I am not 100% sure if this is faster or not, but it may prove easier to + * debug things. Just to be on the safe side, I have included both methods + * here, and the mmap() method can be used by setting USE_VASMETHOD to 0 + * above. + */ + +#if !defined(CONS_ADDVAS) +# undef USE_VASMETHOD +# define USE_VASMETHOD 0 +#endif + +static int +scoIsMultiConsole (void) +{ + int x; + + if (sco_mcdone) + return sco_ismc; + x = access ("/usr/lib/vidconf/.multiconsole", F_OK); + if (x == 0) + sco_ismc = 1; + sco_mcdone = 1; + return sco_ismc; +} + +/* + * This maps memory using mmap() + */ +static pointer +mapVidMemMMAP(int ScreenNum, unsigned long Base, unsigned long Size, int flags) +{ + int fd; + unsigned long realBase, alignOff; + pointer base; + + fd = open (DEV_MEM, (flags & VIDMEM_READONLY) ? O_RDONLY : O_RDWR); + if (fd < 0) { + FatalError("xf86MapVidMem: failed to open %s (%s)\n", DEV_MEM, + strerror(errno)); + return 0; /* NOTREACHED */ + } + + realBase = Base & ~(getpagesize() - 1); + alignOff = Base - realBase; + +#ifdef DEBUG + ErrorF("base: %lx, realBase: %lx, alignOff: %lx\n", Base,realBase,alignOff); +#endif + + base = mmap((caddr_t)0, Size + alignOff, + (flags & VIDMEM_READONLY) ? PROT_READ : (PROT_READ | PROT_WRITE), + MAP_SHARED, fd, (off_t)realBase); + close(fd); + if (base == MAP_FAILED) { + FatalError("xf86MapVidMem: Could not mmap framebuffer (0x%08x,0x%x) (%s)\n", + Base, Size, strerror(errno)); + return 0; /* NOTREACHED */ + } + +#ifdef DEBUG + ErrorF("base: %lx aligned base: %lx\n",base, base + alignOff); +#endif + return (pointer)((char *)base + alignOff); +} + +#if (USE_VASMETHOD) +/* + * This maps memory using the virtual address space (VAS) console calls. + */ +static pointer +mapVidMemVAS(int ScreenNum, unsigned long Base, unsigned long Size, int flags) +{ + struct vidvasmem vas; + pointer base; + + vas.base = (long)Base; + vas.size = (long)Size; + + base = (pointer)ioctl (xf86Info.consoleFd, CONS_ADDVAS, &vas); + if (base == (pointer)-1) { + return mapVidMemMMAP(ScreenNum, Base, Size, flags); + } + return base; +} +#endif /* USE_VASMETHOD */ + +struct vidclass vidclasslist[] = { + { "VBE", "", 0xf0000000, 0x2000000, 0 }, + { "P9000", "", 0xc0000000, 0x400000, 0 }, + { "TULIP", "", 0x80000000, 0x400000, 0 }, + { "VIPER", "", 0xa0000000, 0x400000, 0 }, + { "S3T", "", 0xa0000000, 0x200000, 0 }, + { "S3DT", "", 0x4000000, 0x400000, 0 }, + { "MGA", "", 0x2200000, 0x4000, 0 }, + { "CLVGA", "", 0xa0000, 0x20000, 0 }, + { "OLIVE", "", 0xd8000000, 0x400000, 0 }, + { "S3C", "", 0xa0000, 0x10000, 0 }, + { "MGAVLB", "", 0xac000, 0x34000, 0 }, + { "ATI8514", "", 0xFF000, 0x1000, 0 }, + { "GXREGS", "", 0xb0000, 0x10000, 0 }, + { "GX", "", 0xa0000, 0x10000, 0 }, + { "CT64300", "", 0xa0000000, 0x400000, 0 }, + { "SVGA", "", 0xa0000, 0x20000, 0 }, + { "S3V", "", 0xa0000000, 0x400000, 0 }, + { "8514A", "", 0xFF000, 0x1000, 0 }, + { "VGA", "", 0xa0000, 0x10000, 0 }, + { 0 } +}; + +static pointer +mapVidMemVC(int ScreenNum, unsigned long Base, unsigned long Size, int flags) +{ + struct vidclass *vcp; + char *class = NULL; + pointer base; + + for (vcp = vidclasslist; vcp->name; vcp++) { + if ((vcp->base == Base) && (vcp->size == Size)) { + class = vcp->name; + break; + } + } + + if (class == NULL) { + /* + * As a fall-back, we will try and use the mmap() approach. This may + * prove to be the wrong thing to do, but time and testing will tell. + */ + ErrorF("xf86MapVidMem: No class map defined for (0x%08x,0x%08x)\n", Base, Size); +#if USE_VASMETHOD + return mapVidMemVAS(ScreenNum, Base, Size, flags); +#else /* !USE_VASMETHOD */ + return mapVidMemMMAP(ScreenNum, Base, Size, flags); +#endif + } + + /* + * We found a suitable class. Try and use it. + */ + base = (pointer)ioctl(xf86Info.consoleFd, MAP_CLASS, class); + if ((int)base == -1) { + FatalError("xf86MapVidMem: Failed to map video memory class `%s'\n", class); + return 0; /* NOTREACHED */ + } + + return base; +} + +/* + * Unmapping the video memory is easy. We always call munmap(), as it is + * safe to do so even if we haven't actually mapped in any pages via mmap(). + * In the case where we used the video class, we don't need to do anything + * as the kernel will clean up the TSS when we exit, and will undo the + * vasbind() that was done when the class was originally mapped. If we used + * vasmap, we simply undo the map. Again, it is benign to call vasunmap + * even if we got the frame buffer via some other mechanism (like mmap). + */ + +static void +unmapVidMem(int ScreenNum, pointer Base, unsigned long Size) +{ +#if USE_VASMETHOD + struct vidvasmem vas; + int x; + + vas.base = (long)Base; + vas.size = (long)Size; + + x = ioctl (xf86Info.consoleFd, CONS_DELVAS, &vas); + if (x == 0) + return; +#endif /* USE_VASMETHOD */ + + munmap(Base, Size); +} + +/* + * Set things up to point to our local functions. When the kernel gets + * MTRR support, we will need to add the required functions for that + * here too. MTRR support will most likely appear in 5.0.8 or 5.1.0. + * + * We also want to lock the X server process to the base CPU in an MPX + * system, since we will be going to IOPL 3. Most engine drivers can cope + * with I/O access on any CPU but there are a few (AST Manhattan I believe) + * that can't, so the server needs to be locked to CPU0. + */ +void +xf86OSInitVidMem(VidMemInfoPtr pVidMem) +{ + int mpx_fd; + + if (scoIsMultiConsole ()) { + pVidMem->mapMem = mapVidMemVC; + } else { +#if USE_VASMETHOD + pVidMem->mapMem = mapVidMemVAS; +#else + pVidMem->mapMem = mapVidMemMMAP; +#endif + } + + pVidMem->unmapMem = unmapVidMem; + pVidMem->linearSupported = TRUE; + pVidMem->initialised = TRUE; + + if (mpxLock && (mpx_fd = open (MPXNAME, O_RDONLY)) > 0) { + if (ioctl (mpx_fd, ACPU_XLOCK, BASECPU) < 0) + ErrorF ("xf86OSInitVidMem: Can not bind to CPU 0 (%s)\n", + strerror(errno)); + close (mpx_fd); + } +} + |