diff options
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/linux/lnx_video.c')
| -rw-r--r-- | xorg-server/hw/xfree86/os-support/linux/lnx_video.c | 676 |
1 files changed, 0 insertions, 676 deletions
diff --git a/xorg-server/hw/xfree86/os-support/linux/lnx_video.c b/xorg-server/hw/xfree86/os-support/linux/lnx_video.c index ffffc81c5..c09d71947 100644 --- a/xorg-server/hw/xfree86/os-support/linux/lnx_video.c +++ b/xorg-server/hw/xfree86/os-support/linux/lnx_video.c @@ -38,13 +38,6 @@ #include "xf86Priv.h" #include "xf86_OSlib.h" #include "xf86OSpriv.h" -#ifdef __alpha__ -#include "shared/xf86Axp.h" -#endif - -#ifdef HAS_MTRR_SUPPORT -#include <asm/mtrr.h> -#endif static Bool ExtendedEnabled = FALSE; @@ -72,405 +65,16 @@ extern int iopl(int __level); #endif -#ifdef __alpha__ -#define BUS_BASE bus_base -#else -#define BUS_BASE (0) -#endif /* __alpha__ */ - /***************************************************************************/ /* Video Memory Mapping section */ /***************************************************************************/ -static void *mapVidMem(int, unsigned long, unsigned long, int); -static void unmapVidMem(int, void *, unsigned long); - -#if defined (__alpha__) -extern void sethae(unsigned long hae); -extern unsigned long _bus_base __P((void)) __attribute__ ((const)); -extern unsigned long _bus_base_sparse __P((void)) __attribute__ ((const)); - -static void *mapVidMemSparse(int, unsigned long, unsigned long, int); -extern axpDevice lnxGetAXP(void); -static void unmapVidMemSparse(int, void *, unsigned long); -static axpDevice axpSystem = -1; -static Bool needSparse; -static unsigned long hae_thresh; -static unsigned long hae_mask; -static unsigned long bus_base; -#endif - -#ifdef HAS_MTRR_SUPPORT - -#define SPLIT_WC_REGIONS 1 - -static void *setWC(int, unsigned long, unsigned long, Bool, MessageType); -static void undoWC(int, void *); - -/* The file desc for /proc/mtrr. Once opened, left opened, and the mtrr - driver will clean up when we exit. */ -#define MTRR_FD_UNOPENED (-1) /* We have yet to open /proc/mtrr */ -#define MTRR_FD_PROBLEM (-2) /* We tried to open /proc/mtrr, but had - a problem. */ -static int mtrr_fd = MTRR_FD_UNOPENED; - -/* Open /proc/mtrr. FALSE on failure. Will always fail on Linux 2.0, - and will fail on Linux 2.2 with MTRR support configured out, - so verbosity should be chosen appropriately. */ -static Bool -mtrr_open(int verbosity) -{ - /* Only report absence of /proc/mtrr once. */ - static Bool warned = FALSE; - - if (mtrr_fd == MTRR_FD_UNOPENED) { - mtrr_fd = open("/proc/mtrr", O_WRONLY); - - if (mtrr_fd < 0) - mtrr_fd = MTRR_FD_PROBLEM; - } - - if (mtrr_fd == MTRR_FD_PROBLEM) { - /* To make sure we only ever warn once, need to check - verbosity outside xf86MsgVerb */ - if (!warned && verbosity <= xf86GetVerbosity()) { - xf86MsgVerb(X_WARNING, verbosity, - "System lacks support for changing MTRRs\n"); - warned = TRUE; - } - - return FALSE; - } - else - return TRUE; -} - -/* - * We maintain a list of WC regions for each physical mapping so they can - * be undone when unmapping. - */ - -struct mtrr_wc_region { - struct mtrr_sentry sentry; - Bool added; /* added WC or removed it */ - struct mtrr_wc_region *next; -}; - -static struct mtrr_wc_region * -mtrr_cull_wc_region(int screenNum, unsigned long base, unsigned long size, - MessageType from) -{ - /* Some BIOS writers thought that setting wc over the mmio - region of a graphics devices was a good idea. Try to fix - it. */ - - struct mtrr_gentry gent; - struct mtrr_wc_region *wcreturn = NULL, *wcr; - int count, ret = 0; - - /* Linux 2.0 users should not get a warning without -verbose */ - if (!mtrr_open(2)) - return NULL; - - for (gent.regnum = 0; - ioctl(mtrr_fd, MTRRIOC_GET_ENTRY, &gent) >= 0; gent.regnum++) { - if (gent.type != MTRR_TYPE_WRCOMB - || gent.base + gent.size <= base || base + size <= gent.base) - continue; - - /* Found an overlapping region. Delete it. */ - - wcr = malloc(sizeof(*wcr)); - if (!wcr) - return NULL; - wcr->sentry.base = gent.base; - wcr->sentry.size = gent.size; - wcr->sentry.type = MTRR_TYPE_WRCOMB; - wcr->added = FALSE; - - count = 3; - while (count-- && - (ret = ioctl(mtrr_fd, MTRRIOC_KILL_ENTRY, &(wcr->sentry))) < 0); - - if (ret >= 0) { - xf86DrvMsg(screenNum, from, - "Removed MMIO write-combining range " - "(0x%lx,0x%lx)\n", - (unsigned long) gent.base, (unsigned long) gent.size); - wcr->next = wcreturn; - wcreturn = wcr; - gent.regnum--; - } - else { - free(wcr); - xf86DrvMsgVerb(screenNum, X_WARNING, 0, - "Failed to remove MMIO " - "write-combining range (0x%lx,0x%lx)\n", - (unsigned long)gent.base, (unsigned long) gent.size); - } - } - return wcreturn; -} - -static struct mtrr_wc_region * -mtrr_remove_offending(int screenNum, unsigned long base, unsigned long size, - MessageType from) -{ - struct mtrr_gentry gent; - struct mtrr_wc_region *wcreturn = NULL, **wcr; - - if (!mtrr_open(2)) - return NULL; - - wcr = &wcreturn; - for (gent.regnum = 0; - ioctl(mtrr_fd, MTRRIOC_GET_ENTRY, &gent) >= 0; gent.regnum++) { - if (gent.type == MTRR_TYPE_WRCOMB - && ((gent.base >= base && gent.base + gent.size < base + size) || - (gent.base > base && gent.base + gent.size <= base + size))) { - *wcr = mtrr_cull_wc_region(screenNum, gent.base, gent.size, from); - if (*wcr) - gent.regnum--; - while (*wcr) { - wcr = &((*wcr)->next); - } - } - } - return wcreturn; -} - -static struct mtrr_wc_region * -mtrr_add_wc_region(int screenNum, unsigned long base, unsigned long size, - MessageType from) -{ - struct mtrr_wc_region **wcr, *wcreturn, *curwcr; - - /* - * There can be only one.... - */ - - wcreturn = mtrr_remove_offending(screenNum, base, size, from); - wcr = &wcreturn; - while (*wcr) { - wcr = &((*wcr)->next); - } - - /* Linux 2.0 should not warn, unless the user explicitly asks for - WC. */ - - if (!mtrr_open(from == X_CONFIG ? 0 : 2)) - return wcreturn; - - *wcr = curwcr = malloc(sizeof(**wcr)); - if (!curwcr) - return wcreturn; - - curwcr->sentry.base = base; - curwcr->sentry.size = size; - curwcr->sentry.type = MTRR_TYPE_WRCOMB; - curwcr->added = TRUE; - curwcr->next = NULL; - -#if SPLIT_WC_REGIONS - /* - * Splits up the write-combining region if it is not aligned on a - * size boundary. - */ - - { - unsigned long lbase, d_size = 1; - unsigned long n_size = size; - unsigned long n_base = base; - - for (lbase = n_base, d_size = 1; !(lbase & 1); - lbase = lbase >> 1, d_size <<= 1); - while (d_size > n_size) - d_size = d_size >> 1; - DebugF("WC_BASE: 0x%lx WC_END: 0x%lx\n", base, base + d_size - 1); - n_base += d_size; - n_size -= d_size; - if (n_size) { - xf86DrvMsgVerb(screenNum, X_INFO, 3, "Splitting WC range: " - "base: 0x%lx, size: 0x%lx\n", base, size); - curwcr->next = mtrr_add_wc_region(screenNum, n_base, n_size, from); - } - curwcr->sentry.size = d_size; - } - - /*****************************************************************/ -#endif /* SPLIT_WC_REGIONS */ - - if (ioctl(mtrr_fd, MTRRIOC_ADD_ENTRY, &curwcr->sentry) >= 0) { - /* Avoid printing on every VT switch */ - if (xf86ServerIsInitialising()) { - xf86DrvMsg(screenNum, from, - "Write-combining range (0x%lx,0x%lx)\n", base, size); - } - return wcreturn; - } - else { - *wcr = curwcr->next; - free(curwcr); - - /* Don't complain about the VGA region: MTRR fixed - regions aren't currently supported, but might be in - the future. */ - if ((unsigned long) base >= 0x100000) { - xf86DrvMsgVerb(screenNum, X_WARNING, 0, - "Failed to set up write-combining range " - "(0x%lx,0x%lx)\n", base, size); - } - return wcreturn; - } -} - -static void -mtrr_undo_wc_region(int screenNum, struct mtrr_wc_region *wcr) -{ - struct mtrr_wc_region *p, *prev; - - if (mtrr_fd >= 0) { - p = wcr; - while (p) { - if (p->added) - ioctl(mtrr_fd, MTRRIOC_DEL_ENTRY, &p->sentry); - prev = p; - p = p->next; - free(prev); - } - } -} - -static void * -setWC(int screenNum, unsigned long base, unsigned long size, Bool enable, - MessageType from) -{ - if (enable) - return mtrr_add_wc_region(screenNum, base, size, from); - else - return mtrr_cull_wc_region(screenNum, base, size, from); -} - -static void -undoWC(int screenNum, void *regioninfo) -{ - mtrr_undo_wc_region(screenNum, regioninfo); -} - -#endif /* HAS_MTRR_SUPPORT */ - void xf86OSInitVidMem(VidMemInfoPtr pVidMem) { - pVidMem->linearSupported = TRUE; -#ifdef __alpha__ - if (axpSystem == -1) { - axpSystem = lnxGetAXP(); - if ((needSparse = (_bus_base_sparse() > 0))) { - hae_thresh = xf86AXPParams[axpSystem].hae_thresh; - hae_mask = xf86AXPParams[axpSystem].hae_mask; - } - bus_base = _bus_base(); - } - if (needSparse) { - xf86Msg(X_INFO, "Machine needs sparse mapping\n"); - pVidMem->mapMem = mapVidMemSparse; - pVidMem->unmapMem = unmapVidMemSparse; - } - else { - xf86Msg(X_INFO, "Machine type has 8/16 bit access\n"); - pVidMem->mapMem = mapVidMem; - pVidMem->unmapMem = unmapVidMem; - } -#else - pVidMem->mapMem = mapVidMem; - pVidMem->unmapMem = unmapVidMem; -#endif /* __alpha__ */ - -#ifdef HAS_MTRR_SUPPORT - pVidMem->setWC = setWC; - pVidMem->undoWC = undoWC; -#endif pVidMem->initialised = TRUE; } -#ifdef __sparc__ -/* Basically, you simply cannot do this on Sparc. You have to do something portable - * like use /dev/fb* or mmap() on /proc/bus/pci/X/Y nodes. -DaveM - */ -static void * -mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags) -{ - return NULL; -} -#else -static void * -mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags) -{ - void *base; - int fd; - int mapflags = MAP_SHARED; - int prot; - memType realBase, alignOff; - - realBase = Base & ~(getpagesize() - 1); - alignOff = Base - realBase; - DebugF("base: %lx, realBase: %lx, alignOff: %lx \n", - Base, realBase, alignOff); - -#if defined(__ia64__) || defined(__arm__) || defined(__s390__) -#ifndef MAP_WRITECOMBINED -#define MAP_WRITECOMBINED 0x00010000 -#endif -#ifndef MAP_NONCACHED -#define MAP_NONCACHED 0x00020000 -#endif - if (flags & VIDMEM_FRAMEBUFFER) - mapflags |= MAP_WRITECOMBINED; - else - mapflags |= MAP_NONCACHED; -#endif - -#if 0 - /* this will disappear when people upgrade their kernels */ - fd = open(DEV_MEM, - ((flags & VIDMEM_READONLY) ? O_RDONLY : O_RDWR) | O_SYNC); -#else - fd = open(DEV_MEM, (flags & VIDMEM_READONLY) ? O_RDONLY : O_RDWR); -#endif - if (fd < 0) { - FatalError("xf86MapVidMem: failed to open " DEV_MEM " (%s)\n", - strerror(errno)); - } - - if (flags & VIDMEM_READONLY) - prot = PROT_READ; - else - prot = PROT_READ | PROT_WRITE; - - /* This requires linux-0.99.pl10 or above */ - base = mmap((caddr_t) 0, Size + alignOff, prot, mapflags, fd, - (off_t) realBase + BUS_BASE); - close(fd); - if (base == MAP_FAILED) { - FatalError("xf86MapVidMem: Could not mmap framebuffer" - " (0x%08lx,0x%lx) (%s)\n", Base, Size, strerror(errno)); - } - DebugF("base: %lx aligned base: %lx\n", base, (char *) base + alignOff); - return (char *) base + alignOff; -} -#endif /* !(__sparc__) */ - -static void -unmapVidMem(int ScreenNum, void *Base, unsigned long Size) -{ - uintptr_t alignOff = (uintptr_t) Base - - ((uintptr_t) Base & ~(getpagesize() - 1)); - - DebugF("alignment offset: %lx\n", (unsigned long) alignOff); - munmap((void *) ((uintptr_t) Base - alignOff), (Size + alignOff)); -} - /***************************************************************************/ /* I/O Permissions section */ /***************************************************************************/ @@ -565,8 +169,6 @@ xf86DisableIO(void) #if defined (__alpha__) -#define vuip volatile unsigned int * - extern int readDense8(void *Base, register unsigned long Offset); extern int readDense16(void *Base, register unsigned long Offset); extern int readDense32(void *Base, register unsigned long Offset); @@ -577,284 +179,6 @@ extern void extern void writeDense32(int Value, void *Base, register unsigned long Offset); -static int readSparse8(void *Base, register unsigned long Offset); -static int readSparse16(void *Base, register unsigned long Offset); -static int readSparse32(void *Base, register unsigned long Offset); -static void - writeSparseNB8(int Value, void *Base, register unsigned long Offset); -static void - writeSparseNB16(int Value, void *Base, register unsigned long Offset); -static void - writeSparseNB32(int Value, void *Base, register unsigned long Offset); -static void - writeSparse8(int Value, void *Base, register unsigned long Offset); -static void - writeSparse16(int Value, void *Base, register unsigned long Offset); -static void - writeSparse32(int Value, void *Base, register unsigned long Offset); - -#define DENSE_BASE 0x2ff00000000UL -#define SPARSE_BASE 0x30000000000UL - -static unsigned long msb_set = 0; - -static void * -mapVidMemSparse(int ScreenNum, unsigned long Base, unsigned long Size, - int flags) -{ - int fd, prot; - unsigned long ret, rets = 0; - - static Bool was_here = FALSE; - - if (!was_here) { - was_here = TRUE; - - xf86WriteMmio8 = writeSparse8; - xf86WriteMmio16 = writeSparse16; - xf86WriteMmio32 = writeSparse32; - xf86WriteMmioNB8 = writeSparseNB8; - xf86WriteMmioNB16 = writeSparseNB16; - xf86WriteMmioNB32 = writeSparseNB32; - xf86ReadMmio8 = readSparse8; - xf86ReadMmio16 = readSparse16; - xf86ReadMmio32 = readSparse32; - } - - fd = open(DEV_MEM, (flags & VIDMEM_READONLY) ? O_RDONLY : O_RDWR); - if (fd < 0) { - FatalError("xf86MapVidMem: failed to open " DEV_MEM " (%s)\n", - strerror(errno)); - } - -#if 0 - xf86Msg(X_INFO, "mapVidMemSparse: try Base 0x%lx size 0x%lx flags 0x%x\n", - Base, Size, flags); -#endif - - if (flags & VIDMEM_READONLY) - prot = PROT_READ; - else - prot = PROT_READ | PROT_WRITE; - - /* This requirers linux-0.99.pl10 or above */ - - /* - * Always do DENSE mmap, since read32/write32 currently require it. - */ - ret = (unsigned long) mmap((caddr_t) (DENSE_BASE + Base), Size, - prot, MAP_SHARED, fd, (off_t) (bus_base + Base)); - - /* - * Do SPARSE mmap only when MMIO and not MMIO_32BIT, or FRAMEBUFFER - * and SPARSE (which should require the use of read/write macros). - * - * By not SPARSE mmapping an 8MB framebuffer, we can save approx. 256K - * bytes worth of pagetable (32 pages). - */ - if (((flags & VIDMEM_MMIO) && !(flags & VIDMEM_MMIO_32BIT)) || - ((flags & VIDMEM_FRAMEBUFFER) && (flags & VIDMEM_SPARSE))) { - rets = (unsigned long) mmap((caddr_t) (SPARSE_BASE + (Base << 5)), - Size << 5, prot, MAP_SHARED, fd, - (off_t) _bus_base_sparse() + (Base << 5)); - } - - close(fd); - - if (ret == (unsigned long) MAP_FAILED) { - FatalError("xf86MapVidMemSparse: Could not (dense) mmap fb (%s)\n", - strerror(errno)); - } - - if (((flags & VIDMEM_MMIO) && !(flags & VIDMEM_MMIO_32BIT)) || - ((flags & VIDMEM_FRAMEBUFFER) && (flags & VIDMEM_SPARSE))) { - if (rets == (unsigned long) MAP_FAILED || - rets != (SPARSE_BASE + (Base << 5))) { - FatalError("mapVidMemSparse: Could not (sparse) mmap fb (%s)\n", - strerror(errno)); - } - } - -#if 1 - if (rets) - xf86Msg(X_INFO, "mapVidMemSparse: mapped Base 0x%lx size 0x%lx" - " to DENSE at 0x%lx and SPARSE at 0x%lx\n", - Base, Size, ret, rets); - else - xf86Msg(X_INFO, "mapVidMemSparse: mapped Base 0x%lx size 0x%lx" - " to DENSE only at 0x%lx\n", Base, Size, ret); - -#endif - return (void *) ret; -} - -static void -unmapVidMemSparse(int ScreenNum, void *Base, unsigned long Size) -{ - unsigned long Offset = (unsigned long) Base - DENSE_BASE; - -#if 1 - xf86Msg(X_INFO, "unmapVidMemSparse: unmapping Base 0x%lx Size 0x%lx\n", - Base, Size); -#endif - /* Unmap DENSE always. */ - munmap((caddr_t) Base, Size); - - /* Unmap SPARSE always, and ignore error in case we did not map it. */ - munmap((caddr_t) (SPARSE_BASE + (Offset << 5)), Size << 5); -} - -static int -readSparse8(void *Base, register unsigned long Offset) -{ - register unsigned long result, shift; - register unsigned long msb; - - mem_barrier(); - Offset += (unsigned long) Base - DENSE_BASE; - shift = (Offset & 0x3) << 3; - if (Offset >= (hae_thresh)) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - - mem_barrier(); - result = *(vuip) (SPARSE_BASE + (Offset << 5)); - result >>= shift; - return 0xffUL & result; -} - -static int -readSparse16(void *Base, register unsigned long Offset) -{ - register unsigned long result, shift; - register unsigned long msb; - - mem_barrier(); - Offset += (unsigned long) Base - DENSE_BASE; - shift = (Offset & 0x2) << 3; - if (Offset >= hae_thresh) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - - mem_barrier(); - result = *(vuip) (SPARSE_BASE + (Offset << 5) + (1 << (5 - 2))); - result >>= shift; - return 0xffffUL & result; -} - -static int -readSparse32(void *Base, register unsigned long Offset) -{ - /* NOTE: this is really using DENSE. */ - mem_barrier(); - return *(vuip) ((unsigned long) Base + (Offset)); -} - -static void -writeSparse8(int Value, void *Base, register unsigned long Offset) -{ - register unsigned long msb; - register unsigned int b = Value & 0xffU; - - write_mem_barrier(); - Offset += (unsigned long) Base - DENSE_BASE; - if (Offset >= hae_thresh) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - - write_mem_barrier(); - *(vuip) (SPARSE_BASE + (Offset << 5)) = b * 0x01010101; -} - -static void -writeSparse16(int Value, void *Base, register unsigned long Offset) -{ - register unsigned long msb; - register unsigned int w = Value & 0xffffU; - - write_mem_barrier(); - Offset += (unsigned long) Base - DENSE_BASE; - if (Offset >= hae_thresh) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - - write_mem_barrier(); - *(vuip) (SPARSE_BASE + (Offset << 5) + (1 << (5 - 2))) = w * 0x00010001; -} - -static void -writeSparse32(int Value, void *Base, register unsigned long Offset) -{ - /* NOTE: this is really using DENSE. */ - write_mem_barrier(); - *(vuip) ((unsigned long) Base + (Offset)) = Value; - return; -} - -static void -writeSparseNB8(int Value, void *Base, register unsigned long Offset) -{ - register unsigned long msb; - register unsigned int b = Value & 0xffU; - - Offset += (unsigned long) Base - DENSE_BASE; - if (Offset >= hae_thresh) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - *(vuip) (SPARSE_BASE + (Offset << 5)) = b * 0x01010101; -} - -static void -writeSparseNB16(int Value, void *Base, register unsigned long Offset) -{ - register unsigned long msb; - register unsigned int w = Value & 0xffffU; - - Offset += (unsigned long) Base - DENSE_BASE; - if (Offset >= hae_thresh) { - msb = Offset & hae_mask; - Offset -= msb; - if (msb_set != msb) { - sethae(msb); - msb_set = msb; - } - } - *(vuip) (SPARSE_BASE + (Offset << 5) + (1 << (5 - 2))) = w * 0x00010001; -} - -static void -writeSparseNB32(int Value, void *Base, register unsigned long Offset) -{ - /* NOTE: this is really using DENSE. */ - *(vuip) ((unsigned long) Base + (Offset)) = Value; - return; -} - void (*xf86WriteMmio8) (int Value, void *Base, unsigned long Offset) = writeDense8; void (*xf86WriteMmio16) (int Value, void *Base, unsigned long Offset) |