/* drm_drv.h -- Generic driver template -*- linux-c -*- * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com * * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Rickard E. (Rik) Faith * Gareth Hughes * * $FreeBSD: src/sys/dev/drm/drm_drv.h,v 1.13 2003/04/25 01:18:46 anholt Exp $ */ /* * To use this template, you must at least define the following (samples * given for the MGA driver): * * #define DRIVER_AUTHOR "VA Linux Systems, Inc." * * #define DRIVER_NAME "mga" * #define DRIVER_DESC "Matrox G200/G400" * #define DRIVER_DATE "20001127" * * #define DRIVER_MAJOR 2 * #define DRIVER_MINOR 0 * #define DRIVER_PATCHLEVEL 2 * * #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls ) * * #define DRM(x) mga_##x */ #ifndef __MUST_HAVE_AGP #define __MUST_HAVE_AGP 0 #endif #ifndef __HAVE_CTX_BITMAP #define __HAVE_CTX_BITMAP 0 #endif #ifndef __HAVE_DMA_IRQ #define __HAVE_DMA_IRQ 0 #endif #ifndef __HAVE_DMA_QUEUE #define __HAVE_DMA_QUEUE 0 #endif #ifndef __HAVE_DMA_SCHEDULE #define __HAVE_DMA_SCHEDULE 0 #endif #ifndef __HAVE_DMA_QUIESCENT #define __HAVE_DMA_QUIESCENT 0 #endif #ifndef __HAVE_RELEASE #define __HAVE_RELEASE 0 #endif #ifndef __HAVE_COUNTERS #define __HAVE_COUNTERS 0 #endif #ifndef __HAVE_SG #define __HAVE_SG 0 #endif #ifndef DRIVER_PREINIT #define DRIVER_PREINIT() #endif #ifndef DRIVER_POSTINIT #define DRIVER_POSTINIT() #endif #ifndef DRIVER_PRERELEASE #define DRIVER_PRERELEASE() #endif #ifndef DRIVER_PRETAKEDOWN #define DRIVER_PRETAKEDOWN() #endif #ifndef DRIVER_POSTCLEANUP #define DRIVER_POSTCLEANUP() #endif #ifndef DRIVER_PRESETUP #define DRIVER_PRESETUP() #endif #ifndef DRIVER_POSTSETUP #define DRIVER_POSTSETUP() #endif #ifndef DRIVER_IOCTLS #define DRIVER_IOCTLS #endif #ifndef DRIVER_FOPS #endif #if 1 && DRM_DEBUG_CODE int DRM(flags) = DRM_FLAG_DEBUG; #else int DRM(flags) = 0; #endif static int DRM(init)(device_t nbdev); static void DRM(cleanup)(device_t nbdev); #ifdef __FreeBSD__ #define DRIVER_SOFTC(unit) \ ((drm_device_t *) devclass_get_softc(DRM(devclass), unit)) #if __REALLY_HAVE_AGP MODULE_DEPEND(DRIVER_NAME, agp, 1, 1, 1); #endif #endif /* __FreeBSD__ */ #ifdef __NetBSD__ #define DRIVER_SOFTC(unit) \ ((drm_device_t *) device_lookup(&DRM(cd), unit)) #endif /* __NetBSD__ */ static drm_ioctl_desc_t DRM(ioctls)[] = { [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { DRM(version), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { DRM(getunique), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { DRM(getmagic), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { DRM(irq_busid), 0, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { DRM(getmap), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { DRM(getclient), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { DRM(getstats), 0, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { DRM(setunique), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { DRM(noop), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { DRM(noop), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { DRM(authmagic), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { DRM(addmap), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { DRM(rmmap), 1, 0 }, #if __HAVE_CTX_BITMAP [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { DRM(setsareactx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { DRM(getsareactx), 1, 0 }, #endif [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { DRM(addctx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { DRM(rmctx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { DRM(modctx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { DRM(getctx), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { DRM(switchctx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { DRM(newctx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { DRM(resctx), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { DRM(adddraw), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { DRM(rmdraw), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { DRM(lock), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { DRM(unlock), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { DRM(noop), 1, 0 }, #if __HAVE_DMA [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { DRM(addbufs), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { DRM(markbufs), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { DRM(infobufs), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { DRM(mapbufs), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { DRM(freebufs), 1, 0 }, /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { DRM(control), 1, 1 }, #endif #if __REALLY_HAVE_AGP [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { DRM(agp_acquire), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { DRM(agp_release), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { DRM(agp_enable), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { DRM(agp_info), 1, 0 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { DRM(agp_alloc), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { DRM(agp_free), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { DRM(agp_bind), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { DRM(agp_unbind), 1, 1 }, #endif #if __HAVE_SG [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { DRM(sg_alloc), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { DRM(sg_free), 1, 1 }, #endif #if __HAVE_VBL_IRQ [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { DRM(wait_vblank), 0, 0 }, #endif DRIVER_IOCTLS }; #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( DRM(ioctls) ) const char *DRM(find_description)(int vendor, int device); #ifdef __FreeBSD__ static struct cdevsw DRM(cdevsw) = { .d_open = DRM( open ), .d_close = DRM( close ), .d_read = DRM( read ), .d_ioctl = DRM( ioctl ), .d_poll = DRM( poll ), .d_mmap = DRM( mmap ), .d_name = DRIVER_NAME, .d_maj = CDEV_MAJOR, .d_flags = D_TTY | D_TRACKCLOSE, #if __FreeBSD_version < 500000 .d_bmaj = -1 #endif }; static int DRM(probe)(device_t dev) { const char *s = NULL; int pciid=pci_get_devid(dev); int vendor = (pciid & 0x0000ffff); int device = (pciid & 0xffff0000) >> 16; s = DRM(find_description)(vendor, device); if (s) { device_set_desc(dev, s); return 0; } return ENXIO; } static int DRM(attach)(device_t dev) { return DRM(init)(dev); } static int DRM(detach)(device_t dev) { DRM(cleanup)(dev); return 0; } static device_method_t DRM(methods)[] = { /* Device interface */ DEVMETHOD(device_probe, DRM( probe)), DEVMETHOD(device_attach, DRM( attach)), DEVMETHOD(device_detach, DRM( detach)), { 0, 0 } }; static driver_t DRM(driver) = { "drm", DRM(methods), sizeof(drm_device_t), }; static devclass_t DRM(devclass); #elif defined(__NetBSD__) static struct cdevsw DRM(cdevsw) = { DRM(open), DRM(close), DRM(read), nowrite, DRM(ioctl), nostop, notty, DRM(poll), DRM(mmap), nokqfilter, D_TTY }; int DRM(refcnt) = 0; #if __NetBSD_Version__ >= 106080000 MOD_DEV( DRIVER_NAME, DRIVER_NAME, NULL, -1, &DRM(cdevsw), CDEV_MAJOR); #else MOD_DEV( DRIVER_NAME, LM_DT_CHAR, CDEV_MAJOR, &DRM(cdevsw) ); #endif int DRM(lkmentry)(struct lkm_table *lkmtp, int cmd, int ver); static int DRM(lkmhandle)(struct lkm_table *lkmtp, int cmd); int DRM(modprobe)(); int DRM(probe)(struct pci_attach_args *pa); void DRM(attach)(struct pci_attach_args *pa, dev_t kdev); int DRM(lkmentry)(struct lkm_table *lkmtp, int cmd, int ver) { DISPATCH(lkmtp, cmd, ver, DRM(lkmhandle), DRM(lkmhandle), DRM(lkmhandle)); } static int DRM(lkmhandle)(struct lkm_table *lkmtp, int cmd) { int j, error = 0; #if defined(__NetBSD__) && (__NetBSD_Version__ > 106080000) struct lkm_dev *args = lkmtp->private.lkm_dev; #endif switch(cmd) { case LKM_E_LOAD: if (lkmexists(lkmtp)) return EEXIST; if(DRM(modprobe)()) return 0; return 1; case LKM_E_UNLOAD: if (DRM(refcnt) > 0) return (EBUSY); break; case LKM_E_STAT: break; default: error = EIO; break; } return error; } int DRM(modprobe)() { struct pci_attach_args pa; int error = 0; if((error = pci_find_device(&pa, DRM(probe))) != 0) DRM(attach)(&pa, 0); return error; } int DRM(probe)(struct pci_attach_args *pa) { const char *desc; desc = DRM(find_description)(PCI_VENDOR(pa->pa_id), PCI_PRODUCT(pa->pa_id)); if (desc != NULL) { return 1; } return 0; } void DRM(attach)(struct pci_attach_args *pa, dev_t kdev) { int i; drm_device_t *dev; config_makeroom(kdev, &DRM(cd)); DRM(cd).cd_devs[(kdev)] = DRM(alloc)(sizeof(drm_device_t), DRM_MEM_DRIVER); dev = DRIVER_SOFTC(kdev); memset(dev, 0, sizeof(drm_device_t)); memcpy(&dev->pa, pa, sizeof(dev->pa)); DRM_INFO("%s", DRM(find_description)(PCI_VENDOR(pa->pa_id), PCI_PRODUCT(pa->pa_id))); DRM(init)(dev); } int DRM(detach)(struct device *self, int flags) { DRM(cleanup)((drm_device_t *)self); return 0; } int DRM(activate)(struct device *self, enum devact act) { switch (act) { case DVACT_ACTIVATE: return (EOPNOTSUPP); break; case DVACT_DEACTIVATE: /* FIXME */ break; } return (0); } #endif /* __NetBSD__ */ const char *DRM(find_description)(int vendor, int device) { const char *s = NULL; int i=0, done=0; while ( !done && (DRM(devicelist)[i].vendor != 0 ) ) { if ( (DRM(devicelist)[i].vendor == vendor) && (DRM(devicelist)[i].device == device) ) { done=1; if ( DRM(devicelist)[i].supported ) s = DRM(devicelist)[i].name; else DRM_INFO("%s not supported\n", DRM(devicelist)[i].name); } i++; } return s; } static int DRM(setup)( drm_device_t *dev ) { int i; DRIVER_PRESETUP(); dev->buf_use = 0; dev->buf_alloc = 0; #if __HAVE_DMA i = DRM(dma_setup)( dev ); if ( i < 0 ) return i; #endif dev->counters = 6 + __HAVE_COUNTERS; dev->types[0] = _DRM_STAT_LOCK; dev->types[1] = _DRM_STAT_OPENS; dev->types[2] = _DRM_STAT_CLOSES; dev->types[3] = _DRM_STAT_IOCTLS; dev->types[4] = _DRM_STAT_LOCKS; dev->types[5] = _DRM_STAT_UNLOCKS; #ifdef __HAVE_COUNTER6 dev->types[6] = __HAVE_COUNTER6; #endif #ifdef __HAVE_COUNTER7 dev->types[7] = __HAVE_COUNTER7; #endif #ifdef __HAVE_COUNTER8 dev->types[8] = __HAVE_COUNTER8; #endif #ifdef __HAVE_COUNTER9 dev->types[9] = __HAVE_COUNTER9; #endif #ifdef __HAVE_COUNTER10 dev->types[10] = __HAVE_COUNTER10; #endif #ifdef __HAVE_COUNTER11 dev->types[11] = __HAVE_COUNTER11; #endif #ifdef __HAVE_COUNTER12 dev->types[12] = __HAVE_COUNTER12; #endif #ifdef __HAVE_COUNTER13 dev->types[13] = __HAVE_COUNTER13; #endif #ifdef __HAVE_COUNTER14 dev->types[14] = __HAVE_COUNTER14; #endif #ifdef __HAVE_COUNTER15 dev->types[14] = __HAVE_COUNTER14; #endif for ( i = 0 ; i < DRM_ARRAY_SIZE(dev->counts) ; i++ ) atomic_set( &dev->counts[i], 0 ); for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) { dev->magiclist[i].head = NULL; dev->magiclist[i].tail = NULL; } dev->maplist = DRM(alloc)(sizeof(*dev->maplist), DRM_MEM_MAPS); if(dev->maplist == NULL) return DRM_ERR(ENOMEM); memset(dev->maplist, 0, sizeof(*dev->maplist)); TAILQ_INIT(dev->maplist); dev->lock.hw_lock = NULL; dev->lock.lock_queue = 0; dev->irq = 0; dev->context_flag = 0; dev->last_context = 0; #if __FreeBSD_version >= 500000 callout_init( &dev->timer, 1 ); #else callout_init( &dev->timer ); #endif #ifdef __FreeBSD__ dev->buf_sigio = NULL; #elif defined(__NetBSD__) dev->buf_pgid = 0; #endif DRM_DEBUG( "\n" ); DRIVER_POSTSETUP(); return 0; } static int DRM(takedown)( drm_device_t /* vm.c -- Memory mapping for DRM -*- linux-c -*- * Created: Mon Jan 4 08:58:31 1999 by faith@precisioninsight.com * Revised: Mon Dec 6 16:54:35 1999 by faith@precisioninsight.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/vm.c,v 1.7 1999/08/21 02:48:34 faith Exp $ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/vm.c,v 1.1 1999/09/25 14:38:02 dawes Exp $ * */ #define __NO_VERSION__ #include "drmP.h" struct vm_operations_struct drm_vm_ops = { nopage: drm_vm_nopage, open: drm_vm_open, close: drm_vm_close, }; struct vm_operations_struct drm_vm_shm_ops = { nopage: drm_vm_shm_nopage, open: drm_vm_open, close: drm_vm_close, }; struct vm_operations_struct drm_vm_dma_ops = { nopage: drm_vm_dma_nopage, open: drm_vm_open, close: drm_vm_close, }; #if LINUX_VERSION_CODE < 0x020317 unsigned long drm_vm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #else /* Return type changed in 2.3.23 */ struct page *drm_vm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #endif { DRM_DEBUG("0x%08lx, %d\n", address, write_access); return NOPAGE_SIGBUS; /* Disallow mremap */ } #if LINUX_VERSION_CODE < 0x020317 unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #else /* Return type changed in 2.3.23 */ struct page *drm_vm_shm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #endif { drm_file_t *priv = vma->vm_file->private_data; drm_device_t *dev = priv->dev; unsigned long physical; unsigned long offset; unsigned long page; if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */ if (!dev->lock.hw_lock) return NOPAGE_OOM; /* Nothing allocated */ offset = address - vma->vm_start; page = offset >> PAGE_SHIFT; physical = (unsigned long)dev->lock.hw_lock + (offset & (~PAGE_MASK)); atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */ DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical); #if LINUX_VERSION_CODE < 0x020317 return physical; #else return mem_map + MAP_NR(physical); #endif } #if LINUX_VERSION_CODE < 0x020317 unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #else /* Return type changed in 2.3.23 */ struct page *drm_vm_dma_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) #endif { drm_file_t *priv = vma->vm_file->private_data; drm_device_t *dev = priv->dev; drm_device_dma_t *dma = dev->dma; unsigned long physical; unsigned long offset; unsigned long page; if (!dma) return NOPAGE_SIGBUS; /* Error */ if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */ if (!dma->pagelist) return NOPAGE_OOM ; /* Nothing allocated */ offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ page = offset >> PAGE_SHIFT; physical = dma->pagelist[page] + (offset & (~PAGE_MASK)); atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */ DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical); #if LINUX_VERSION_CODE < 0x020317 return physical; #else return mem_map + MAP_NR(physical); #endif } void drm_vm_open(struct vm_area_struct *vma) { drm_file_t *priv = vma->vm_file->private_data; drm_device_t *dev = priv->dev; #if DRM_DEBUG_CODE drm_vma_entry_t *vma_entry; #endif DRM_DEBUG("0x%08lx,0x%08lx\n", vma->vm_start, vma->vm_end - vma->vm_start); atomic_inc(&dev->vma_count); MOD_INC_USE_COUNT; #if DRM_DEBUG_CODE vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS); if (vma_entry) { down(&dev->struct_sem); vma_entry->vma = vma; vma_entry->next = dev->vmalist; vma_entry->pid = current->pid; dev->vmalist = vma_entry; up(&dev->struct_sem); } #endif } void drm_vm_close(struct vm_area_struct *vma) { drm_file_t *priv = vma->vm_file->private_data; drm_device_t *dev = priv->dev; #if DRM_DEBUG_CODE drm_vma_entry_t *pt, *prev; #endif DRM_DEBUG("0x%08lx,0x%08lx\n", vma->vm_start, vma->vm_end - vma->vm_start); MOD_DEC_USE_COUNT; atomic_dec(&dev->vma_count); #if DRM_DEBUG_CODE down(&dev->struct_sem); for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) { if (pt->vma == vma) { if (prev) { prev->next = pt->next; } else { dev->vmalist = pt->next; } drm_free(pt, sizeof(*pt), DRM_MEM_VMAS); break; } } up(&dev->struct_sem); #endif } int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_device_dma_t *dma = dev->dma; unsigned long length = vma->vm_end - vma->vm_start; DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n", vma->vm_start, vma->vm_end, VM_OFFSET(vma)); /* Length must match exact page count */ if ((length >> PAGE_SHIFT) != dma->page_count) return -EINVAL; vma->vm_ops = &drm_vm_dma_ops; vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */ #if LINUX_VERSION_CODE < 0x020203 /* KERNEL_VERSION(2,2,3) */ /* In Linux 2.2.3 and above, this is handled in do_mmap() in mm/mmap.c. */ ++filp->f_count; #endif vma->vm_file = filp; /* Needed for drm_vm_open() */ drm_vm_open(vma); return 0; } int drm_mmap(struct file *filp, struct vm_area_struct *vma) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_map_t *map = NULL; int i; DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n", vma->vm_start, vma->vm_end, VM_OFFSET(vma)); if (!VM_OFFSET(vma)) return drm_mmap_dma(filp, vma); /* A sequential search of a linked list is fine here because: 1) there will only be about 5-10 entries in the list and, 2) a DRI client only has to do this mapping once, so it doesn't have to be optimized for performance, even if the list was a bit longer. */ for (i = 0; i < dev->map_count; i++) { map = dev->maplist[i]; if (map->offset == VM_OFFSET(vma)) break; } if (i >= dev->map_count) return -EINVAL; if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) return -EPERM; /* Check for valid size. */ if (map->size != vma->vm_end - vma->vm_start) return -EINVAL; switch (map->type) { case _DRM_FRAME_BUFFER: case _DRM_REGISTERS: if (VM_OFFSET(vma) >= __pa(high_memory)) { #if defined(__i386__) if (boot_cpu_data.x86 > 3) { pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT; } #endif vma->vm_flags |= VM_IO; /* not in core dump */ } if (remap_page_range(vma->vm_start, VM_OFFSET(vma), vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; vma->vm_ops = &drm_vm_ops; break; case _DRM_SHM: vma->vm_ops = &drm_vm_shm_ops; /* Don't let this area swap. Change when DRM_KERNEL advisory is supported. */ vma->vm_flags |= VM_LOCKED; break; default: return -EINVAL; /* This should never happen. */ } vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */ if (map->flags & _DRM_READ_ONLY) { #if defined(__i386__) pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; #else /* Ye gads this is ugly. With more thought we could move this up higher and use `protection_map' instead. */ vma->vm_page_prot = __pgprot(pte_val(pte_wrprotect( __pte(pgprot_val(vma->vm_page_prot))))); #endif } #if LINUX_VERSION_CODE < 0x020203 /* KERNEL_VERSION(2,2,3) */ /* In Linux 2.2.3 and above, this is handled in do_mmap() in mm/mmap.c. */ ++filp->f_count; #endif vma->vm_file = filp; /* Needed for drm_vm_open() */ drm_vm_open(vma); return 0; }
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