/* $XFree86: xc/lib/Xxf86dga/XF86DGA.c,v 3.23tsi Exp $ */ /* Copyright (c) 1995 Jon Tombs Copyright (c) 1995,1996 The XFree86 Project, Inc */ /* THIS IS NOT AN X CONSORTIUM STANDARD */ #ifdef __UNIXOS2__ /* needed here to override certain constants in X headers */ #define INCL_DOS #define INCL_DOSIOCTL #define I_NEED_OS2_H #include #endif #if defined(linux) #define HAS_MMAP_ANON #include #include /* kernel header doesn't work with -ansi */ /* #include */ /* PAGE_SIZE */ #define HAS_SC_PAGESIZE /* _SC_PAGESIZE may be an enum for Linux */ #define HAS_GETPAGESIZE #endif /* linux */ #if defined(CSRG_BASED) #define HAS_MMAP_ANON #define HAS_GETPAGESIZE #include #include #endif /* CSRG_BASED */ #if defined(DGUX) #define HAS_GETPAGESIZE #define MMAP_DEV_ZERO #include #include #include #endif /* DGUX */ #if defined(SVR4) && !defined(DGUX) #define MMAP_DEV_ZERO #include #include #include #endif /* SVR4 && !DGUX */ #if defined(sun) && !defined(SVR4) /* SunOS */ #define MMAP_DEV_ZERO /* doesn't SunOS have MAP_ANON ?? */ #define HAS_GETPAGESIZE #include #include #endif /* sun && !SVR4 */ #ifdef XNO_SYSCONF #undef _SC_PAGESIZE #endif #define NEED_EVENTS #define NEED_REPLIES #include #include #include #include #include extern XExtDisplayInfo* xdga_find_display(Display*); extern char *xdga_extension_name; #define XF86DGACheckExtension(dpy,i,val) \ XextCheckExtension (dpy, i, xdga_extension_name, val) /***************************************************************************** * * * public XFree86-DGA Extension routines * * * *****************************************************************************/ Bool XF86DGAQueryExtension ( Display *dpy, int *event_basep, int *error_basep ){ return XDGAQueryExtension(dpy, event_basep, error_basep); } Bool XF86DGAQueryVersion( Display* dpy, int* majorVersion, int* minorVersion ){ return XDGAQueryVersion(dpy, majorVersion, minorVersion); } Bool XF86DGAGetVideoLL( Display* dpy, int screen, unsigned int *offset, int *width, int *bank_size, int *ram_size ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAGetVideoLLReply rep; xXF86DGAGetVideoLLReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAGetVideoLL, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAGetVideoLL; req->screen = screen; if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { UnlockDisplay(dpy); SyncHandle(); return False; } *offset = rep.offset; *width = rep.width; *bank_size = rep.bank_size; *ram_size = rep.ram_size; UnlockDisplay(dpy); SyncHandle(); return True; } Bool XF86DGADirectVideoLL( Display* dpy, int screen, int enable ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGADirectVideoReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGADirectVideo, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGADirectVideo; req->screen = screen; req->enable = enable; UnlockDisplay(dpy); SyncHandle(); XSync(dpy,False); return True; } Bool XF86DGAGetViewPortSize( Display* dpy, int screen, int *width, int *height ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAGetViewPortSizeReply rep; xXF86DGAGetViewPortSizeReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAGetViewPortSize, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAGetViewPortSize; req->screen = screen; if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { UnlockDisplay(dpy); SyncHandle(); return False; } *width = rep.width; *height = rep.height; UnlockDisplay(dpy); SyncHandle(); return True; } Bool XF86DGASetViewPort( Display* dpy, int screen, int x, int y ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGASetViewPortReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGASetViewPort, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGASetViewPort; req->screen = screen; req->x = x; req->y = y; UnlockDisplay(dpy); SyncHandle(); XSync(dpy,False); return True; } Bool XF86DGAGetVidPage( Display* dpy, int screen, int *vpage ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAGetVidPageReply rep; xXF86DGAGetVidPageReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAGetVidPage, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAGetVidPage; req->screen = screen; if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { UnlockDisplay(dpy); SyncHandle(); return False; } *vpage = rep.vpage; UnlockDisplay(dpy); SyncHandle(); return True; } Bool XF86DGASetVidPage( Display* dpy, int screen, int vpage ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGASetVidPageReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGASetVidPage, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGASetVidPage; req->screen = screen; req->vpage = vpage; UnlockDisplay(dpy); SyncHandle(); XSync(dpy,False); return True; } Bool XF86DGAInstallColormap( Display* dpy, int screen, Colormap cmap ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAInstallColormapReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAInstallColormap, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAInstallColormap; req->screen = screen; req->id = cmap; UnlockDisplay(dpy); SyncHandle(); XSync(dpy,False); return True; } Bool XF86DGAQueryDirectVideo( Display *dpy, int screen, int *flags ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAQueryDirectVideoReply rep; xXF86DGAQueryDirectVideoReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAQueryDirectVideo, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAQueryDirectVideo; req->screen = screen; if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { UnlockDisplay(dpy); SyncHandle(); return False; } *flags = rep.flags; UnlockDisplay(dpy); SyncHandle(); return True; } Bool XF86DGAViewPortChanged( Display *dpy, int screen, int n ){ XExtDisplayInfo *info = xdga_find_display (dpy); xXF86DGAViewPortChangedReply rep; xXF86DGAViewPortChangedReq *req; XF86DGACheckExtension (dpy, info, False); LockDisplay(dpy); GetReq(XF86DGAViewPortChanged, req); req->reqType = info->codes->major_opcode; req->dgaReqType = X_XF86DGAViewPortChanged; req->screen = screen; req->n = n; if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { UnlockDisplay(dpy); SyncHandle(); return False; } UnlockDisplay(dpy); SyncHandle(); return rep.result; } /* Helper functions */ #include #include #include #include #if defined(ISC) # define HAS_SVR3_MMAP # include # include # include # include # include # include # include # include #else # if defined(Lynx) && defined(NO_MMAP) # include # include # include # else # if !defined(__UNIXOS2__) # include # endif # endif #endif #include #include #include #if defined(SVR4) && !defined(sun) #define DEV_MEM "/dev/pmem" #elif defined(SVR4) && defined(sun) #define DEV_MEM "/dev/xsvc" #elif defined(HAS_APERTURE_DRV) #define DEV_MEM "/dev/xf86" #else #define DEV_MEM "/dev/mem" #endif typedef struct { unsigned long physaddr; /* actual requested physical address */ unsigned long size; /* actual requested map size */ unsigned long delta; /* delta to account for page alignment */ void * vaddr; /* mapped address, without the delta */ int refcount; /* reference count */ } MapRec, *MapPtr; typedef struct { Display * display; int screen; MapPtr map; } ScrRec, *ScrPtr; static int mapFd = -1; static int numMaps = 0; static int numScrs = 0; static MapPtr *mapList = NULL; static ScrPtr *scrList = NULL; static MapPtr AddMap(void) { MapPtr *old; old = mapList; mapList = realloc(mapList, sizeof(MapPtr) * (numMaps + 1)); if (!mapList) { mapList = old; return NULL; } mapList[numMaps] = malloc(sizeof(MapRec)); if (!mapList[numMaps]) return NULL; return mapList[numMaps++]; } static ScrPtr AddScr(void) { ScrPtr *old; old = scrList; scrList = realloc(scrList, sizeof(ScrPtr) * (numScrs + 1)); if (!scrList) { scrList = old; return NULL; } scrList[numScrs] = malloc(sizeof(ScrRec)); if (!scrList[numScrs]) return NULL; return scrList[numScrs++]; } static MapPtr FindMap(unsigned long address, unsigned long size) { int i; for (i = 0; i < numMaps; i++) { if (mapList[i]->physaddr == address && mapList[i]->size == size) return mapList[i]; } return NULL; } static ScrPtr FindScr(Display *display, int screen) { int i; for (i = 0; i < numScrs; i++) { if (scrList[i]->display == display && scrList[i]->screen == screen) return scrList[i]; } return NULL; } static void * MapPhysAddress(unsigned long address, unsigned long size) { unsigned long offset, delta; int pagesize = -1; void *vaddr; MapPtr mp; #if defined(ISC) && defined(HAS_SVR3_MMAP) struct kd_memloc mloc; #elif defined(__UNIXOS2__) APIRET rc; ULONG action; HFILE hfd; #endif if ((mp = FindMap(address, size))) { mp->refcount++; return (void *)((unsigned long)mp->vaddr + mp->delta); } #if defined(_SC_PAGESIZE) && defined(HAS_SC_PAGESIZE) pagesize = sysconf(_SC_PAGESIZE); #endif #ifdef _SC_PAGE_SIZE if (pagesize == -1) pagesize = sysconf(_SC_PAGE_SIZE); #endif #ifdef HAS_GETPAGESIZE if (pagesize == -1) pagesize = getpagesize(); #endif #ifdef PAGE_SIZE if (pagesize == -1) pagesize = PAGE_SIZE; #endif if (pagesize == -1) pagesize = 4096; delta = address % pagesize; offset = address - delta; #if defined(ISC) && defined(HAS_SVR3_MMAP) if (mapFd < 0) { if ((mapFd = open("/dev/mmap", O_RDWR)) < 0) return NULL; } mloc.vaddr = (char *)0; mloc.physaddr = (char *)offset; mloc.length = size + delta; mloc.ioflg=1; if ((vaddr = (void *)ioctl(mapFd, MAP, &mloc)) == (void *)-1) return NULL; #elif defined (__UNIXOS2__) /* * Dragon warning here! /dev/pmap$ is never closed, except on progam exit. * Consecutive calling of this routine will make PMAP$ driver run out * of memory handles. Some umap/close mechanism should be provided */ rc = DosOpen("/dev/pmap$", &hfd, &action, 0, FILE_NORMAL, FILE_OPEN, OPEN_ACCESS_READWRITE | OPEN_SHARE_DENYNONE, (PEAOP2)NULL); if (rc != 0) return NULL; { struct map_ioctl { union { ULONG phys; void* user; } a; ULONG size; } pmap,dmap; ULONG plen,dlen; #define XFREE86_PMAP 0x76 #define PMAP_MAP 0x44 pmap.a.phys = offset; pmap.size = size + delta; rc = DosDevIOCtl(hfd, XFREE86_PMAP, PMAP_MAP, (PULONG)&pmap, sizeof(pmap), &plen, (PULONG)&dmap, sizeof(dmap), &dlen); if (rc == 0) { vaddr = dmap.a.user; } } if (rc != 0) return NULL; #elif defined(Lynx) && defined(NO_MMAP) vaddr = (void *)smem_create("XF86DGA", (char *)offset, size + delta, SM_READ|SM_WRITE); #else #ifndef MAP_FILE #define MAP_FILE 0 #endif if (mapFd < 0) { if ((mapFd = open(DEV_MEM, O_RDWR)) < 0) return NULL; } vaddr = (void *)mmap(NULL, size + delta, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, mapFd, (off_t)offset); if (vaddr == (void *)-1) return NULL; #endif if (!vaddr) { if (!(mp = AddMap())) return NULL; mp->physaddr = address; mp->size = size; mp->delta = delta; mp->vaddr = vaddr; mp->refcount = 1; } return (void *)((unsigned long)vaddr + delta); } /* * Still need to find a clean way of detecting the death of a DGA app * and returning things to normal - Jon * This is here to help debugging without rebooting... Also C-A-BS * should restore text mode. */ int XF86DGAForkApp(int screen) { pid_t pid; int status; int i; /* fork the app, parent hangs around to clean up */ if ((pid = fork()) > 0) { ScrPtr sp; waitpid(pid, &status, 0); for (i = 0; i < numScrs; i++) { sp = scrList[i]; XF86DGADirectVideoLL(sp->display, sp->screen, 0); XSync(sp->display, False); } if (WIFEXITED(status)) _exit(0); else _exit(-1); } return pid; } Bool XF86DGADirectVideo( Display *dis, int screen, int enable ){ ScrPtr sp; MapPtr mp = NULL; if ((sp = FindScr(dis, screen))) mp = sp->map; if (enable & XF86DGADirectGraphics) { #if !defined(ISC) && !defined(HAS_SVR3_MMAP) \ && !(defined(Lynx) && defined(NO_MMAP)) \ && !defined(__UNIXOS2__) if (mp && mp->vaddr) mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ | PROT_WRITE); #endif } else { #if !defined(ISC) && !defined(HAS_SVR3_MMAP) \ && !(defined(Lynx) && defined(NO_MMAP)) \ && !defined(__UNIXOS2__) if (mp && mp->vaddr) mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ); #elif defined(Lynx) && defined(NO_MMAP) /* XXX this doesn't allow enable after disable */ smem_create(NULL, mp->vaddr, mp->size + mp->delta, SM_DETACH); smem_remove("XF86DGA"); #endif } XF86DGADirectVideoLL(dis, screen, enable); return 1; } static void XF86cleanup(int sig) { ScrPtr sp; int i; static char beenhere = 0; if (beenhere) _exit(3); beenhere = 1; for (i = 0; i < numScrs; i++) { sp = scrList[i]; XF86DGADirectVideo(sp->display, sp->screen, 0); XSync(sp->display, False); } _exit(3); } Bool XF86DGAGetVideo( Display *dis, int screen, char **addr, int *width, int *bank, int *ram ){ unsigned int offset; static int beenHere = 0; ScrPtr sp; MapPtr mp; if (!(sp = FindScr(dis, screen))) { if (!(sp = AddScr())) { fprintf(stderr, "XF86DGAGetVideo: malloc failure\n"); exit(-2); } sp->display = dis; sp->screen = screen; sp->map = NULL; } XF86DGAGetVideoLL(dis, screen , &offset, width, bank, ram); *addr = MapPhysAddress(offset, *bank); if (*addr == NULL) { fprintf(stderr, "XF86DGAGetVideo: failed to map video memory (%s)\n", strerror(errno)); exit(-2); } if ((mp = FindMap(offset, *bank))) sp->map = mp; if (!beenHere) { beenHere = 1; atexit((void(*)(void))XF86cleanup); /* one shot XF86cleanup attempts */ signal(SIGSEGV, XF86cleanup); #ifdef SIGBUS signal(SIGBUS, XF86cleanup); #endif signal(SIGHUP, XF86cleanup); signal(SIGFPE, XF86cleanup); } return 1; }