renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Collapse)	Author
2006-07-19	.cvsignore -> .gitignore	Michel Dänzer
	Sort the merged file, remove the redundant explicit .ko lines and add some generated symlinks.
2005-04-26	Convert NOMAN to the new preferred spelling NO_MAN to quiet warnings.	Eric Anholt

2004-05-09	Add .cvsignore files.	Eric Anholt

2002-10-30	Kernel support for vblank syncing on Rage 128 and Matrox.	Eric Anholt

2002-08-30	Remove some extra symlinking for kernel module building that hasn't been	Eric Anholt
	needed since 2000.
2002-07-05	merged bsd-3-0-0-branch	Alan Hourihane

2002-01-27	Import of XFree86 4.2.0	David Dawes

2000-06-13	Merged bsd-1-0-1	Doug Rabson

/** * \file drm_drv.c * Generic driver template * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.com> * * 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 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 void drm_cleanup(struct drm_device * dev); int drm_fb_loaded = 0; static int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv); /** Ioctl table */ static struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0), DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0), DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0), DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0), DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #if __OS_HAS_AGP DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #endif DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0), DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MM_INIT, drm_mm_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MM_TAKEDOWN, drm_mm_takedown_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MM_LOCK, drm_mm_lock_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MM_UNLOCK, drm_mm_unlock_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_CREATE, drm_fence_create_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_REFERENCE, drm_fence_reference_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_UNREFERENCE, drm_fence_unreference_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_SIGNALED, drm_fence_signaled_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_FLUSH, drm_fence_flush_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_WAIT, drm_fence_wait_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_EMIT, drm_fence_emit_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FENCE_BUFFERS, drm_fence_buffers_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_CREATE, drm_bo_create_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_MAP, drm_bo_map_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_UNMAP, drm_bo_unmap_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_REFERENCE, drm_bo_reference_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_UNREFERENCE, drm_bo_unreference_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_SETSTATUS, drm_bo_setstatus_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_INFO, drm_bo_info_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_WAIT_IDLE, drm_bo_wait_idle_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_BO_VERSION, drm_bo_version_ioctl, 0), DRM_IOCTL_DEF(DRM_IOCTL_MM_INFO, drm_mm_info_ioctl, 0), DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0), DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH), }; #define DRM_CORE_IOCTL_COUNT 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_lastclose(struct drm_device * dev) { struct drm_magic_entry *pt, *next; struct drm_map_list *r_list, *list_t; struct drm_vma_entry *vma, *vma_temp; int i; DRM_DEBUG("\n"); /* * We can't do much about this function failing. */ drm_bo_driver_finish(dev); if (dev->driver->lastclose) dev->driver->lastclose(dev); DRM_DEBUG("driver lastclose completed\n"); 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); /* Free drawable information memory */ mutex_lock(&dev->struct_mutex); drm_drawable_free_all(dev); del_timer(&dev->timer); if (dev->unique) { drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); dev->unique = NULL; dev->unique_len = 0; } if (dev->magicfree.next) { list_for_each_entry_safe(pt, next, &dev->magicfree, head) { list_del(&pt->head); drm_ht_remove_item(&dev->magiclist, &pt->hash_item); drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); } drm_ht_remove(&dev->magiclist); } /* Clear AGP information */ if (drm_core_has_AGP(dev) && dev->agp) { struct drm_agp_mem *entry, *tempe; /* Remove AGP resources, but leave dev->agp intact until drv_cleanup is called. */ list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { if (entry->bound) drm_unbind_agp(entry->memory); drm_free_agp(entry->memory, entry->pages); drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); } INIT_LIST_HEAD(&dev->agp->memory); if (dev->agp->acquired) drm_agp_release(dev); dev->agp->acquired = 0; dev->agp->enabled = 0; } if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { drm_sg_cleanup(dev->sg); dev->sg = NULL; } /* Clear vma list (only built for debugging) */ list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { list_del(&vma->head); drm_ctl_free(vma, sizeof(*vma), DRM_MEM_VMAS); } list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { if (!(r_list->map->flags & _DRM_DRIVER)) { drm_rmmap_locked(dev, r_list->map); r_list = 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.file_priv = NULL; wake_up_interruptible(&dev->lock.lock_queue); } dev->dev_mapping = NULL; mutex_unlock(&dev->struct_mutex); DRM_DEBUG("lastclose completed\n"); return 0; } void drm_cleanup_pci(struct pci_dev *pdev) { struct drm_device *dev = pci_get_drvdata(pdev); pci_set_drvdata(pdev, NULL); pci_release_regions(pdev); if (dev) drm_cleanup(dev); } EXPORT_SYMBOL(drm_cleanup_pci); /** * 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_device_id *pciidlist) { struct pci_dev *pdev; struct pci_device_id *pid; int rc, i; DRM_DEBUG("\n"); for (i = 0; (pciidlist[i].vendor != 0) && !drm_fb_loaded; i++) { pid = &pciidlist[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))) { /* Are there device class requirements? */ if ((pid->class != 0) && ((pdev->class & pid->class_mask) != pid->class)) { continue; } /* is there already a driver loaded, or (short circuit saves work) */ /* does something like VesaFB have control of the memory region? */ if (pci_dev_driver(pdev) || pci_request_regions(pdev, "DRM scan")) { /* go into stealth mode */ drm_fb_loaded = 1; pci_dev_put(pdev); break; } /* no fbdev or vesadev, put things back and wait for normal probe */ pci_release_regions(pdev); } } if (!drm_fb_loaded) return pci_register_driver(&driver->pci_driver); else { for (i = 0; pciidlist[i].vendor != 0; i++) { pid = &pciidlist[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))) { /* Are there device class requirements? */ if ((pid->class != 0) && ((pdev->class & pid->class_mask) != pid->class)) { continue; } /* stealth mode requires a manual probe */ pci_dev_get(pdev); if ((rc = drm_get_dev(pdev, &pciidlist[i], driver))) { pci_dev_put(pdev); return rc; } } } DRM_INFO("Used old pci detect: framebuffer loaded\n"); } return 0; } EXPORT_SYMBOL(drm_init); /** * Called via cleanup_module() at module unload time. * * Cleans up all DRM device, calling drm_lastclose(). * * \sa drm_init */ static void drm_cleanup(struct drm_device * dev) { DRM_DEBUG("\n"); if (!dev) { DRM_ERROR("cleanup called no dev\n"); return; } drm_lastclose(dev); drm_fence_manager_takedown(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->unload) dev->driver->unload(dev); if (!drm_fb_loaded) pci_disable_device(dev->pdev); drm_ctxbitmap_cleanup(dev); drm_ht_remove(&dev->map_hash); drm_memrange_takedown(&dev->offset_manager); drm_ht_remove(&dev->object_hash); drm_put_minor(dev); if (drm_put_dev(dev)) DRM_ERROR("Cannot unload module\n"); } int drm_minors_cleanup(int id, void *ptr, void *data) { struct drm_minor *minor = ptr; struct drm_device *dev; struct drm_driver *driver = data; dev = minor->dev; if (minor->dev->driver != driver) return 0; if (minor->type != DRM_MINOR_LEGACY) return 0; if (dev) pci_dev_put(dev->pdev); drm_cleanup(dev); return 1; } void drm_exit(struct drm_driver *driver) { DRM_DEBUG("\n"); if (drm_fb_loaded) { idr_for_each(&drm_minors_idr, &drm_minors_cleanup, driver); } else pci_unregister_driver(&driver->pci_driver); #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)) free_nopage_retry(); #endif DRM_INFO("Module unloaded\n"); } EXPORT_SYMBOL(drm_exit); /** File operations structure */ static const struct file_operations drm_stub_fops = { .owner = THIS_MODULE, .open = drm_stub_open }; static int __init drm_core_init(void) { int ret; struct sysinfo si; unsigned long avail_memctl_mem; unsigned long max_memctl_mem; idr_init(&drm_minors_idr); si_meminfo(&si); /* * AGP only allows low / DMA32 memory ATM. */ avail_memctl_mem = si.totalram - si.totalhigh; /* * Avoid overflows */ max_memctl_mem = 1UL << (32 - PAGE_SHIFT); max_memctl_mem = (max_memctl_mem / si.mem_unit) * PAGE_SIZE; if (avail_memctl_mem >= max_memctl_mem) avail_memctl_mem = max_memctl_mem; drm_init_memctl(avail_memctl_mem/2, avail_memctl_mem*3/4, si.mem_unit); ret = -ENOMEM; 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 = proc_mkdir("dri", NULL); if (!drm_proc_root) { DRM_ERROR("Cannot create /proc/dri\n"); ret = -1; goto err_p3; } drm_mem_init(); 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(); err_p2: unregister_chrdev(DRM_MAJOR, "drm"); idr_destroy(&drm_minors_idr); err_p1: return ret; } static void __exit drm_core_exit(void) { remove_proc_entry("dri", NULL); drm_sysfs_destroy(); unregister_chrdev(DRM_MAJOR, "drm"); idr_destroy(&drm_minors_idr); } module_init(drm_core_init); module_exit(drm_core_exit); /** * Get version information * * \param inode device inode. * \param file_priv DRM file private. * \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 drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_version *version = data; int len; version->version_major = dev->driver->major; version->version_minor = dev->driver->minor; version->version_patchlevel = dev->driver->patchlevel; DRM_COPY(version->name, dev->driver->name); DRM_COPY(version->date, dev->driver->date); DRM_COPY(version->desc, dev->driver->desc); return 0; } /** * Called whenever a process performs an ioctl on /dev/drm. * * \param inode device inode. * \param file_priv DRM file private. * \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. * * Copies data in and out according to the size and direction given in cmd, * which must match the ioctl cmd known by the kernel. The kernel uses a 512 * byte stack buffer to store the ioctl arguments in kernel space. Should we * ever need much larger ioctl arguments, we may need to allocate memory. */ int drm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { return drm_unlocked_ioctl(filp, cmd, arg); } EXPORT_SYMBOL(drm_ioctl); long drm_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct drm_file *file_priv = filp->private_data; struct drm_device *dev = file_priv->minor->dev; struct drm_ioctl_desc *ioctl; drm_ioctl_t *func; unsigned int nr = DRM_IOCTL_NR(cmd); int retcode = -EINVAL; char kdata[512]; atomic_inc(&dev->ioctl_count); atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); ++file_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(file_priv->minor->device), file_priv->authenticated); if ((nr >= DRM_CORE_IOCTL_COUNT) && ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) goto err_i1; if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) ioctl = &drm_ioctls[nr]; else { retcode = -EINVAL; goto err_i1; } #if 0 /* * This check is disabled, because driver private ioctl->cmd * are not the ioctl commands with size and direction bits but * just the indices. The DRM core ioctl->cmd are the proper ioctl * commands. The drivers' ioctl tables need to be fixed. */ if (ioctl->cmd != cmd) { retcode = -EINVAL; goto err_i1; } #endif 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 (cmd & IOC_IN) { if (copy_from_user(kdata, (void __user *)arg, _IOC_SIZE(cmd)) != 0) { retcode = -EACCES; goto err_i1; } } if (!func) { DRM_DEBUG("no function\n"); retcode = -EINVAL; } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || ((ioctl->flags & DRM_MASTER) && !file_priv->master)) { retcode = -EACCES; } else { retcode = func(dev, kdata, file_priv); } if ((retcode == 0) && (cmd & IOC_OUT)) { if (copy_to_user((void __user *)arg, kdata, _IOC_SIZE(cmd)) != 0) retcode = -EACCES; } err_i1: atomic_dec(&dev->ioctl_count); if (retcode) DRM_DEBUG("ret = %d\n", retcode); return retcode; } EXPORT_SYMBOL(drm_unlocked_ioctl); drm_local_map_t *drm_getsarea(struct drm_device *dev) { struct drm_map_list *entry; list_for_each_entry(entry, &dev->maplist, head) { if (entry->map && entry->map->type == _DRM_SHM && (entry->map->flags & _DRM_CONTAINS_LOCK)) { return entry->map; } } return NULL; } EXPORT_SYMBOL(drm_getsarea);