/** * \file drm_drv.h * Generic driver template * * \author Rickard E. (Rik) Faith * \author Gareth Hughes * * To use this template, you must at least define the following (samples * given for the MGA driver): * * \code * #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 * \endcode */ /* * 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. */ #ifndef DRIVER_IOCTLS #define DRIVER_IOCTLS #endif #ifndef MODULE /** Use an additional macro to avoid preprocessor troubles */ #define DRM_OPTIONS_FUNC DRM(options) /** * Called by the kernel to parse command-line options passed via the * boot-loader (e.g., LILO). It calls the insmod option routine, * parse_options(). */ static int __init DRM(options)( char *str ) { DRM(parse_options)( str ); return 1; } __setup( DRIVER_NAME "=", DRM_OPTIONS_FUNC ); #undef DRM_OPTIONS_FUNC #endif #define MAX_DEVICES 4 static drm_device_t DRM(device)[MAX_DEVICES]; static int DRM(numdevs) = 0; struct file_operations DRM(fops) = { .owner = THIS_MODULE, .open = DRM(open), .flush = DRM(flush), .release = DRM(release), .ioctl = DRM(ioctl), .mmap = DRM(mmap), .fasync = DRM(fasync), .poll = DRM(poll), .read = DRM(read), }; /** Ioctl table */ 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_by_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_VERSION)] = { DRM(setversion), 0, 1 }, [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 }, [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { DRM(setsareactx), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { DRM(getsareactx), 1, 0 }, [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 }, [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 }, #if __OS_HAS_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 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { DRM(sg_alloc), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { DRM(sg_free), 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { DRM(wait_vblank), 0, 0 }, DRIVER_IOCTLS }; #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( DRM(ioctls) ) #ifdef MODULE static char *drm_opts = NULL; #endif MODULE_AUTHOR( DRIVER_AUTHOR ); MODULE_DESCRIPTION( DRIVER_DESC ); MODULE_PARM( drm_opts, "s" ); MODULE_LICENSE("GPL and additional rights"); static int DRM(setup)( drm_device_t *dev ) { int i; int ret; if (dev->fn_tbl.presetup) { ret=dev->fn_tbl.presetup(dev); if (ret!=0) return ret; } atomic_set( &dev->ioctl_count, 0 ); atomic_set( &dev->vma_count, 0 ); dev->buf_use = 0; atomic_set( &dev->buf_alloc, 0 ); if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) { i = DRM(dma_setup)( dev ); if ( i < 0 ) return i; } 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 -ENOMEM; memset(dev->maplist, 0, sizeof(*dev->maplist)); INIT_LIST_HEAD(&dev->maplist->head); dev->ctxlist = DRM(alloc)(sizeof(*dev->ctxlist), DRM_MEM_CTXLIST); if(dev->ctxlist == NULL) return -ENOMEM; memset(dev->ctxlist, 0, sizeof(*dev->ctxlist)); INIT_LIST_HEAD(&dev->ctxlist->head); dev->vmalist = NULL; dev->sigdata.lock = dev->lock.hw_lock = NULL; init_waitqueue_head( &dev->lock.lock_queue ); dev->queue_count = 0; dev->queue_reserved = 0; dev->queue_slots = 0; dev->queuelist = NULL; dev->irq_enabled = 0; dev->context_flag = 0; dev->interrupt_flag = 0; dev->dma_flag = 0; dev->last_context = 0; dev->last_switch = 0; dev->last_checked = 0; init_waitqueue_head( &dev->context_wait ); dev->if_version = 0; dev->ctx_start = 0; dev->lck_start = 0; dev->buf_rp = dev->buf; dev->buf_wp = dev->buf; dev->buf_end = dev->buf + DRM_BSZ; dev->buf_async = NULL; init_waitqueue_head( &dev->buf_readers ); init_waitqueue_head( &dev->buf_writers ); DRM_DEBUG( "\n" ); /* * The kernel's context could be created here, but is now created * in drm_dma_enqueue. This is more resource-efficient for * hardware that does not do DMA, but may mean that * drm_select_queue fails between the time the interrupt is * initialized and the time the queues are initialized. */ if (dev->fn_tbl.postsetup) dev->fn_tbl.postsetup(dev); return 0; } /** * Take down the DRM device. * * \param dev DRM device structure. * * Frees every resource in \p dev. * * \sa drm_device and setup(). */ static int DRM(takedown)( drm_device_t *dev ) { drm_magic_entry_t *pt, *next; drm_map_t *map; drm_map_list_t *r_list; struct list_head *list, *list_next; drm_vma_entry_t *vma, *vma_next; int i; DRM_DEBUG( "\n" ); if (dev->fn_tbl.pretakedown) dev->fn_tbl.pretakedown(dev); if ( dev->irq_enabled ) DRM(irq_uninstall)( dev ); down( &dev->struct_sem ); del_timer( &dev->timer ); if ( dev->devname ) { DRM(free)( dev->devname, strlen( dev->devname ) + 1, DRM_MEM_DRIVER ); dev->devname = NULL; } if ( dev->unique ) { DRM(free)( dev->unique, strlen( dev->unique ) + 1, DRM_MEM_DRIVER ); dev->unique = NULL; dev->unique_len = 0; } /* Clear pid list */ for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) { for ( pt = dev->magiclist[i].head ; pt ; pt = next ) { next = pt->next; DRM(free)( pt, sizeof(*pt), DRM_MEM_MAGIC ); } dev->magiclist[i].head = dev->magiclist[i].tail = NULL; } /* Clear AGP information */ if (drm_core_has_AGP(dev) && dev->agp) { drm_agp_mem_t *entry; drm_agp_mem_t *nexte; /* Remove AGP resources, but leave dev->agp intact until drv_cleanup is called. */ for ( entry = dev->agp->memory ; entry ; entry = nexte ) { nexte = entry->next; if ( entry->bound ) DRM(unbind_agp)( entry->memory ); DRM(free_agp)( entry->memory, entry->pages ); DRM(free)( entry, sizeof(*entry), DRM_MEM_AGPLISTS ); } dev->agp->memory = NULL; if ( dev->agp->acquired ) DRM(agp_do_release)(); dev->agp->acquired = 0; dev->agp->enabled = 0; } /* Clear vma list (only built for debugging) */ if ( dev->vmalist ) { for ( vma = dev->vmalist ; vma ; vma = vma_next ) { vma_next = vma->next; DRM(free)( vma, sizeof(*vma), DRM_MEM_VMAS ); } dev->vmalist = NULL; } if( dev->maplist ) { list_for_each_safe( list, list_next, &dev->maplist->head ) { r_list = (drm_map_list_t *)list; if ( ( map = r_list->map ) ) { switch ( map->type ) { case _DRM_REGISTERS: case _DRM_FRAME_BUFFER: if (drm_core_has_MTRR(dev)) { if ( map->mtrr >= 0 ) { int retcode; retcode = mtrr_del( map->mtrr, map->offset, map->size ); DRM_DEBUG( "mtrr_del=%d\n", retcode ); } } DRM(ioremapfree)( map->handle, map->size, dev ); break; case _DRM_SHM: vfree(map->handle); break; case _DRM_AGP: /* Do nothing here, because this is all * handled in the AGP/GART driver. */ break; case _DRM_SCATTER_GATHER: /* Handle it */ if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { DRM(sg_cleanup)(dev->sg); dev->sg = NULL; } break; } DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); } list_del( list ); DRM(free)(r_list, sizeof(*r_list), DRM_MEM_MAPS); } DRM(free)(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS); dev->maplist = NULL; } if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) { for ( i = 0 ; i < dev->queue_count ; i++ ) { if ( dev->queuelist[i] ) { DRM(free)( dev->queuelist[i], sizeof(*dev->queuelist[0]), DRM_MEM_QUEUES ); dev->queuelist[i] = NULL; } } DRM(free)( dev->queuelist, dev->queue_slots * sizeof(*dev->queuelist), DRM_MEM_QUEUES ); dev->queuelist = NULL; } dev->queue_count = 0; if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) DRM(dma_takedown)( dev ); if ( dev->lock.hw_lock ) { dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */ dev->lock.filp = NULL; wake_up_interruptible( &dev->lock.lock_queue ); } up( &dev->struct_sem ); return 0; } static void DRM(init_fn_table)(struct drm_device *dev) { dev->fn_tbl.reclaim_buffers = DRM(core_reclaim_buffers); dev->fn_tbl.get_map_ofs = DRM(core_get_map_ofs); dev->fn_tbl.get_reg_ofs = DRM(core_get_reg_ofs); } #include "drm_pciids.h" static struct pci_device_id DRM(pciidlist)[] = { DRM(PCI_IDS) }; static int DRM(probe)(struct pci_dev *pdev) { drm_device_t *dev; int retcode; int i; int is_compat = 0; DRM_DEBUG( "\n" ); for (i = 0; DRM(pciidlist)[i].vendor != 0; i++) { if ((DRM(pciidlist)[i].vendor == pdev->vendor) && (DRM(pciidlist)[i].device == pdev->device)) { is_compat = 1; } } if (is_compat == 0) return -ENODEV; if (DRM(numdevs) >= MAX_DEVICES) return -ENODEV; if ((retcode=pci_enable_device(pdev))) return retcode; dev = &(DRM(device)[DRM(numdevs)]); memset( (void *)dev, 0, sizeof(*dev) ); dev->count_lock = SPIN_LOCK_UNLOCKED; init_timer( &dev->timer ); sema_init( &dev->struct_sem, 1 ); sema_init( &dev->ctxlist_sem, 1 ); if ((dev->minor = DRM(stub_register)(DRIVER_NAME, &DRM(fops),dev)) < 0) return -EPERM; dev->device = MKDEV(DRM_MAJOR, dev->minor ); dev->name = DRIVER_NAME; dev->pdev = pdev; #ifdef __alpha__ dev->hose = pdev->sysdata; dev->pci_domain = dev->hose->bus->number; #else dev->pci_domain = 0; #endif dev->pci_bus = pdev->bus->number; dev->pci_slot = PCI_SLOT(pdev->devfn); dev->pci_func = PCI_FUNC(pdev->devfn); dev->irq = pdev->irq; /* dev_priv_size can be changed by a driver in driver_register_fns */ dev->dev_priv_size = sizeof(u32); /* the DRM has 6 basic counters - drivers add theirs in register_fns */ dev->counters = 6; 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; DRM(init_fn_table)(dev); DRM(driver_register_fns)(dev); if (dev->fn_tbl.preinit) dev->fn_tbl.preinit(dev); if (drm_core_has_AGP(dev)) { dev->agp = DRM(agp_init)(); if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) { DRM_ERROR( "Cannot initialize the agpgart module.\n" ); DRM(stub_unregister)(dev->minor); DRM(takedown)( dev ); return -EINVAL; } if (drm_core_has_MTRR(dev)) { if (dev->agp) dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base, dev->agp->agp_info.aper_size*1024*1024, MTRR_TYPE_WRCOMB, 1 ); } } retcode = DRM(ctxbitmap_init)( dev ); if( retcode ) { DRM_ERROR( "Cannot allocate memory for context bitmap.\n" ); DRM(stub_unregister)(dev->minor); DRM(takedown)( dev ); return retcode; } DRM(numdevs)++; /* no errors, mark it reserved */ DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d: %s\n", DRIVER_NAME, DRIVER_MAJOR, DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE, dev->minor, pci_pretty_name(pdev)); if (dev->fn_tbl.postinit) dev->fn_tbl.postinit(dev); return 0; } /** * Module initialization. Called via init_module at module load time, or via * linux/init/main.c (this is not currently supported). * * \return zero on success or a negative number on failure. * * Initializes an array of drm_device structures, and attempts to * initialize all available devices, using consecutive minors, registering the * stubs and initializing the AGP device. * * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and * after the initialization for driver customization. */ static int __init drm_init( void ) { struct pci_dev *pdev = NULL; DRM_DEBUG( "\n" ); #ifdef MODULE DRM(parse_options)( drm_opts ); #endif DRM(mem_init)(); while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) { DRM(probe)(pdev); } return 0; } /** * Called via cleanup_module() at module unload time. * * Cleans up all DRM device, calling takedown(). * * \sa drm_init(). */ static void __exit drm_cleanup( void ) { drm_device_t *dev; int i; DRM_DEBUG( "\n" ); for (i = DRM(numdevs) - 1; i >= 0; i--) { dev = &(DRM(device)[i]); if ( DRM(stub_unregister)(dev->minor) ) { DRM_ERROR( "Cannot unload module\n" ); } else { DRM_DEBUG("minor %d unregistered\n", dev->minor); if (i == 0) { DRM_INFO( "Module unloaded\n" ); } } DRM(ctxbitmap_cleanup)( dev ); if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && dev->agp && dev->agp->agp_mtrr >= 0) { int retval; retval = mtrr_del( dev->agp->agp_mtrr, dev->agp->agp_info.aper_base, dev->agp->agp_info.aper_size*1024*1024 ); DRM_DEBUG( "mtrr_del=%d\n", retval ); } DRM(takedown)( dev ); if (drm_core_has_AGP(dev) && dev->agp ) { DRM(agp_uninit)(); DRM(free)( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS ); dev->agp = NULL; } if (dev->fn_tbl.postcleanup) dev->fn_tbl.postcleanup(dev); } DRM(numdevs) = 0; } module_init( drm_init ); module_exit( drm_cleanup ); /** * Get version information * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_version structure. * \return zero on success or negative number on failure. * * Fills in the version information in \p arg. */ int DRM(version)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_version_t __user *argp = (void __user *)arg; drm_version_t version; int len; if ( copy_from_user( &version, argp, sizeof(version) ) ) return -EFAULT; #define DRM_COPY( name, value ) \ len = strlen( value ); \ if ( len > name##_len ) len = name##_len; \ name##_len = strlen( value ); \ if ( len && name ) { \ if ( copy_to_user( name, value, len ) ) \ return -EFAULT; \ } version.version_major = DRIVER_MAJOR; version.version_minor = DRIVER_MINOR; version.version_patchlevel = DRIVER_PATCHLEVEL; DRM_COPY( version.name, DRIVER_NAME ); DRM_COPY( version.date, DRIVER_DATE ); DRM_COPY( version.desc, DRIVER_DESC ); if ( copy_to_user( argp, &version, sizeof(version) ) ) return -EFAULT; return 0; } /** * Open file. * * \param inode device inode * \param filp file pointer. * \return zero on success or a negative number on failure. * * Searches the DRM device with the same minor number, calls open_helper(), and * increments the device open count. If the open count was previous at zero, * i.e., it's the first that the device is open, then calls setup(). */ int DRM(open)( struct inode *inode, struct file *filp ) { drm_device_t *dev = NULL; int retcode = 0; int i; for (i = 0; i < DRM(numdevs); i++) { if (iminor(inode) == DRM(device)[i].minor) { dev = &(DRM(device)[i]); break; } } if (!dev) { return -ENODEV; } retcode = DRM(open_helper)( inode, filp, dev ); if ( !retcode ) { atomic_inc( &dev->counts[_DRM_STAT_OPENS] ); spin_lock( &dev->count_lock ); if ( !dev->open_count++ ) { spin_unlock( &dev->count_lock ); return DRM(setup)( dev ); } spin_unlock( &dev->count_lock ); } return retcode; } /** * Release file. * * \param inode device inode * \param filp file pointer. * \return zero on success or a negative number on failure. * * If the hardware lock is held then free it, and take it again for the kernel * context since it's necessary to reclaim buffers. Unlink the file private * data from its list and free it. Decreases the open count and if it reaches * zero calls takedown(). */ int DRM(release)( struct inode *inode, struct file *filp ) { drm_file_t *priv = filp->private_data; drm_device_t *dev; int retcode = 0; lock_kernel(); dev = priv->dev; DRM_DEBUG( "open_count = %d\n", dev->open_count ); if (dev->fn_tbl.prerelease) dev->fn_tbl.prerelease(dev, filp); /* ======================================================== * Begin inline drm_release */ DRM_DEBUG( "pid = %d, device = 0x%lx, open_count = %d\n", current->pid, (long)old_encode_dev(dev->device), dev->open_count ); if ( priv->lock_count && dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.filp == filp ) { DRM_DEBUG( "File %p released, freeing lock for context %d\n", filp, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) ); if (dev->fn_tbl.release) dev->fn_tbl.release(dev, filp); DRM(lock_free)( dev, &dev->lock.hw_lock->lock, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) ); /* FIXME: may require heavy-handed reset of hardware at this point, possibly processed via a callback to the X server. */ } else if ( dev->fn_tbl.release && priv->lock_count && dev->lock.hw_lock ) { /* The lock is required to reclaim buffers */ DECLARE_WAITQUEUE( entry, current ); add_wait_queue( &dev->lock.lock_queue, &entry ); for (;;) { __set_current_state(TASK_INTERRUPTIBLE); if ( !dev->lock.hw_lock ) { /* Device has been unregistered */ retcode = -EINTR; break; } if ( DRM(lock_take)( &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT ) ) { dev->lock.filp = filp; dev->lock.lock_time = jiffies; atomic_inc( &dev->counts[_DRM_STAT_LOCKS] ); break; /* Got lock */ } /* Contention */ schedule(); if ( signal_pending( current ) ) { retcode = -ERESTARTSYS; break; } } __set_current_state(TASK_RUNNING); remove_wait_queue( &dev->lock.lock_queue, &entry ); if( !retcode ) { if (dev->fn_tbl.release) dev->fn_tbl.release(dev, filp); DRM(lock_free)( dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT ); } } if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) { dev->fn_tbl.reclaim_buffers(filp); } DRM(fasync)( -1, filp, 0 ); down( &dev->ctxlist_sem ); if ( !list_empty( &dev->ctxlist->head ) ) { drm_ctx_list_t *pos, *n; list_for_each_entry_safe( pos, n, &dev->ctxlist->head, head ) { if ( pos->tag == priv && pos->handle != DRM_KERNEL_CONTEXT ) { if (dev->fn_tbl.context_dtor) dev->fn_tbl.context_dtor(dev, pos->handle); DRM(ctxbitmap_free)( dev, pos->handle ); list_del( &pos->head ); DRM(free)( pos, sizeof(*pos), DRM_MEM_CTXLIST ); --dev->ctx_count; } } } up( &dev->ctxlist_sem ); down( &dev->struct_sem ); if ( priv->remove_auth_on_close == 1 ) { drm_file_t *temp = dev->file_first; while ( temp ) { temp->authenticated = 0; temp = temp->next; } } if ( priv->prev ) { priv->prev->next = priv->next; } else { dev->file_first = priv->next; } if ( priv->next ) { priv->next->prev = priv->prev; } else { dev->file_last = priv->prev; } up( &dev->struct_sem ); if (dev->fn_tbl.free_filp_priv) dev->fn_tbl.free_filp_priv(dev, priv); DRM(free)( priv, sizeof(*priv), DRM_MEM_FILES ); /* ======================================================== * End inline drm_release */ atomic_inc( &dev->counts[_DRM_STAT_CLOSES] ); spin_lock( &dev->count_lock ); if ( !--dev->open_count ) { if ( atomic_read( &dev->ioctl_count ) || dev->blocked ) { DRM_ERROR( "Device busy: %d %d\n", atomic_read( &dev->ioctl_count ), dev->blocked ); spin_unlock( &dev->count_lock ); unlock_kernel(); return -EBUSY; } spin_unlock( &dev->count_lock ); unlock_kernel(); return DRM(takedown)( dev ); } spin_unlock( &dev->count_lock ); unlock_kernel(); return retcode; } /** * Called whenever a process performs an ioctl on /dev/drm. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument. * \return zero on success or negative number on failure. * * Looks up the ioctl function in the ::ioctls table, checking for root * previleges if so required, and dispatches to the respective function. */ int DRM(ioctl)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_ioctl_desc_t *ioctl; drm_ioctl_t *func; int nr = DRM_IOCTL_NR(cmd); int retcode = 0; atomic_inc( &dev->ioctl_count ); atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] ); ++priv->ioctl_count; DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", current->pid, cmd, nr, (long)old_encode_dev(dev->device), priv->authenticated ); if ( nr >= DRIVER_IOCTL_COUNT ) { retcode = -EINVAL; } else { ioctl = &DRM(ioctls)[nr]; func = ioctl->func; if ( !func ) { DRM_DEBUG( "no function\n" ); retcode = -EINVAL; } else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )|| ( ioctl->auth_needed && !priv->authenticated ) ) { retcode = -EACCES; } else { retcode = func( inode, filp, cmd, arg ); } } atomic_dec( &dev->ioctl_count ); return retcode; } /** * Lock ioctl. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_lock structure. * \return zero on success or negative number on failure. * * Add the current task to the lock wait queue, and attempt to take to lock. */ int DRM(lock)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; DECLARE_WAITQUEUE( entry, current ); drm_lock_t lock; int ret = 0; ++priv->lock_count; if ( copy_from_user( &lock, (drm_lock_t __user *)arg, sizeof(lock) ) ) return -EFAULT; if ( lock.context == DRM_KERNEL_CONTEXT ) { DRM_ERROR( "Process %d using kernel context %d\n", current->pid, lock.context ); return -EINVAL; } DRM_DEBUG( "%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", lock.context, current->pid, dev->lock.hw_lock->lock, lock.flags ); if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE)) if ( lock.context < 0 ) return -EINVAL; add_wait_queue( &dev->lock.lock_queue, &entry ); for (;;) { __set_current_state(TASK_INTERRUPTIBLE); if ( !dev->lock.hw_lock ) { /* Device has been unregistered */ ret = -EINTR; break; } if ( DRM(lock_take)( &dev->lock.hw_lock->lock, lock.context ) ) { dev->lock.filp = filp; dev->lock.lock_time = jiffies; atomic_inc( &dev->counts[_DRM_STAT_LOCKS] ); break; /* Got lock */ } /* Contention */ schedule(); if ( signal_pending( current ) ) { ret = -ERESTARTSYS; break; } } __set_current_state(TASK_RUNNING); remove_wait_queue( &dev->lock.lock_queue, &entry ); sigemptyset( &dev->sigmask ); sigaddset( &dev->sigmask, SIGSTOP ); sigaddset( &dev->sigmask, SIGTSTP ); sigaddset( &dev->sigmask, SIGTTIN ); sigaddset( &dev->sigmask, SIGTTOU ); dev->sigdata.context = lock.context; dev->sigdata.lock = dev->lock.hw_lock; block_all_signals( DRM(notifier), &dev->sigdata, &dev->sigmask ); if (dev->fn_tbl.dma_ready && (lock.flags & _DRM_LOCK_READY)) dev->fn_tbl.dma_ready(dev); if ( dev->fn_tbl.dma_quiescent && (lock.flags & _DRM_LOCK_QUIESCENT )) return dev->fn_tbl.dma_quiescent(dev); /* dev->fn_tbl.kernel_context_switch isn't used by any of the x86 * drivers but is used by the Sparc driver. */ if (dev->fn_tbl.kernel_context_switch && dev->last_context != lock.context) { dev->fn_tbl.kernel_context_switch(dev, dev->last_context, lock.context); } DRM_DEBUG( "%d %s\n", lock.context, ret ? "interrupted" : "has lock" ); return ret; } /** * Unlock ioctl. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_lock structure. * \return zero on success or negative number on failure. * * Transfer and free the lock. */ int DRM(unlock)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_lock_t lock; if ( copy_from_user( &lock, (drm_lock_t __user *)arg, sizeof(lock) ) ) return -EFAULT; if ( lock.context == DRM_KERNEL_CONTEXT ) { DRM_ERROR( "Process %d using kernel context %d\n", current->pid, lock.context ); return -EINVAL; } atomic_inc( &dev->counts[_DRM_STAT_UNLOCKS] ); /* kernel_context_switch isn't used by any of the x86 drm * modules but is required by the Sparc driver. */ if (dev->fn_tbl.kernel_context_switch_unlock) dev->fn_tbl.kernel_context_switch_unlock(dev, &lock); else { DRM(lock_transfer)( dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT ); if ( DRM(lock_free)( dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT ) ) { DRM_ERROR( "\n" ); } } unblock_all_signals(); return 0; }