/** * \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_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. */ #include "drmP.h" #include "drm_core.h" static int drm_version(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /** Ioctl table */ 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_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_ioctl,1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap_ioctl, 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_ioctl, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release_ioctl, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable_ioctl, 1, 1 }, [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info_ioctl, 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 }, }; #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls ) /** * Take down the DRM device. * * \param dev DRM device structure. * * Frees every resource in \p dev. * * \sa drm_device */ 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->driver->pretakedown) dev->driver->pretakedown(dev); if (dev->unique) { drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); dev->unique = NULL; dev->unique_len = 0; } if ( dev->irq_enabled ) drm_irq_uninstall( dev ); down( &dev->struct_sem ); del_timer( &dev->timer ); /* 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_release(dev); 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 ) ) { drm_dma_handle_t dmah; 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; case _DRM_CONSISTENT: dmah.vaddr = map->handle; dmah.busaddr = map->offset; dmah.size = map->size; __drm_pci_free(dev, &dmah); 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; } /** * 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. */ int drm_init( struct drm_driver *driver ) { struct pci_dev *pdev = NULL; struct pci_device_id *pid; int i; DRM_DEBUG( "\n" ); drm_mem_init(); for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) { pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; pdev=NULL; /* pass back in pdev to account for multiple identical cards */ while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) { /* stealth mode requires a manual probe */ pci_dev_get(pdev); drm_get_dev(pdev, pid, driver); } } return 0; } EXPORT_SYMBOL(drm_init); /** * Called via cleanup_module() at module unload time. * * Cleans up all DRM device, calling takedown(). * * \sa drm_init */ static void drm_cleanup( drm_device_t *dev ) { DRM_DEBUG( "\n" ); if (!dev) { DRM_ERROR("cleanup called no dev\n"); return; } drm_takedown( dev ); 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 ); } if (drm_core_has_AGP(dev) && dev->agp ) { drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS ); dev->agp = NULL; } if (dev->driver->postcleanup) dev->driver->postcleanup(dev); drm_put_head(&dev->primary); if ( drm_put_dev(dev) ) DRM_ERROR( "Cannot unload module\n" ); } void drm_exit (struct drm_driver *driver) { int i; drm_device_t *dev = NULL; drm_head_t *head; DRM_DEBUG( "\n" ); for (i = 0; i < drm_cards_limit; i++) { head = drm_heads[i]; if (!head) continue; if (!head->dev) continue; if (head->dev->driver!=driver) continue; dev=head->dev; } if (dev) { /* release the pci driver */ if (dev->pdev) pci_dev_put(dev->pdev); drm_cleanup(dev); } DRM_INFO( "Module unloaded\n" ); } EXPORT_SYMBOL(drm_exit); /** File operations structure */ static struct file_operations drm_stub_fops = { .owner = THIS_MODULE, .open = drm_stub_open }; static int __init drm_core_init(void) { int ret = -ENOMEM; drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1); drm_heads = drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB); if(!drm_heads) goto err_p1; if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) goto err_p1; drm_class = drm_sysfs_create(THIS_MODULE, "drm"); if (IS_ERR(drm_class)) { printk (KERN_ERR "DRM: Error creating drm class.\n"); ret = PTR_ERR(drm_class); goto err_p2; } drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL); if (!drm_proc_root) { DRM_ERROR("Cannot create /proc/dri\n"); ret = -1; goto err_p3; } DRM_INFO( "Initialized %s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); return 0; err_p3: drm_sysfs_destroy(drm_class); err_p2: unregister_chrdev(DRM_MAJOR, "drm"); drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); err_p1: return ret; } static void __exit drm_core_exit (void) { remove_proc_entry("dri", NULL); drm_sysfs_destroy(drm_class); unregister_chrdev(DRM_MAJOR, "drm"); drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); } module_init( drm_core_init ); module_exit( drm_core_exit ); /** * 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. */ static int drm_version( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->head->dev; drm_version_t __user *argp = (void __user *)arg; drm_version_t version; int ret; if ( copy_from_user( &version, argp, sizeof(version) ) ) return -EFAULT; /* version is a required function to return the personality module version */ if ((ret = dev->driver->version(&version))) return ret; if ( copy_to_user( argp, &version, sizeof(version) ) ) return -EFAULT; return 0; } /** * 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->head->dev; drm_ioctl_desc_t *ioctl; drm_ioctl_t *func; unsigned int nr = DRM_IOCTL_NR(cmd); int retcode = -EINVAL; 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(priv->head->device), priv->authenticated ); if (nr < DRIVER_IOCTL_COUNT) ioctl = &drm_ioctls[nr]; else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; else goto err_i1; func = ioctl->func; /* is there a local override? */ if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) func = dev->driver->dma_ioctl; 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 ); } err_i1: atomic_dec( &dev->ioctl_count ); if (retcode) DRM_DEBUG( "ret = %x\n", retcode); return retcode; } EXPORT_SYMBOL(drm_ioctl);