/** * \file drm_stub.h * Stub support * * \author Rickard E. (Rik) Faith */ /* * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org * * Copyright 2001 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 * 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. */ #include #include #include "drmP.h" #include "drm_core.h" unsigned int drm_debug = 0; /* 1 to enable debug output */ EXPORT_SYMBOL(drm_debug); MODULE_AUTHOR(CORE_AUTHOR); MODULE_DESCRIPTION(CORE_DESC); MODULE_LICENSE("GPL and additional rights"); MODULE_PARM_DESC(debug, "Enable debug output"); module_param_named(debug, drm_debug, int, 0600); struct idr drm_minors_idr; struct class *drm_class; struct proc_dir_entry *drm_proc_root; static int drm_minor_get_id(struct drm_device *dev, int type) { int new_id; int ret; int base = 0, limit = 63; again: if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) { DRM_ERROR("Out of memory expanding drawable idr\n"); return -ENOMEM; } mutex_lock(&dev->struct_mutex); ret = idr_get_new_above(&drm_minors_idr, NULL, base, &new_id); mutex_unlock(&dev->struct_mutex); if (ret == -EAGAIN) { goto again; } else if (ret) { return ret; } if (new_id >= limit) { idr_remove(&drm_minors_idr, new_id); return -EINVAL; } return new_id; } static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver) { int retcode; INIT_LIST_HEAD(&dev->filelist); INIT_LIST_HEAD(&dev->ctxlist); INIT_LIST_HEAD(&dev->vmalist); INIT_LIST_HEAD(&dev->maplist); spin_lock_init(&dev->count_lock); spin_lock_init(&dev->drw_lock); spin_lock_init(&dev->tasklet_lock); spin_lock_init(&dev->lock.spinlock); init_timer(&dev->timer); mutex_init(&dev->struct_mutex); mutex_init(&dev->ctxlist_mutex); idr_init(&dev->drw_idr); dev->pdev = pdev; dev->pci_device = pdev->device; dev->pci_vendor = pdev->vendor; #ifdef __alpha__ dev->hose = pdev->sysdata; #endif dev->irq = pdev->irq; if (drm_ht_create(&dev->map_hash, 12)) { return -ENOMEM; } /* the DRM has 6 basic counters */ 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; dev->driver = driver; if (drm_core_has_AGP(dev)) { if (drm_device_is_agp(dev)) dev->agp = drm_agp_init(dev); if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) { DRM_ERROR("Cannot initialize the agpgart module.\n"); retcode = -EINVAL; goto error_out_unreg; } 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); } } if (dev->driver->load) if ((retcode = dev->driver->load(dev, ent->driver_data))) goto error_out_unreg; retcode = drm_ctxbitmap_init(dev); if (retcode) { DRM_ERROR("Cannot allocate memory for context bitmap.\n"); goto error_out_unreg; } return 0; error_out_unreg: drm_lastclose(dev); return retcode; } /** * Get a secondary minor number. * * \param dev device data structure * \param sec-minor structure to hold the assigned minor * \return negative number on failure. * * Search an empty entry and initialize it to the given parameters, and * create the proc init entry via proc_init(). This routines assigns * minor numbers to secondary heads of multi-headed cards */ static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) { struct drm_minor *new_minor; int ret; int minor_id; DRM_DEBUG("\n"); minor_id = drm_minor_get_id(dev, type); if (minor_id < 0) return minor_id; new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL); if (!new_minor) { ret = -ENOMEM; goto err_idr; } new_minor->type = type; new_minor->device = MKDEV(DRM_MAJOR, minor_id); new_minor->dev = dev; new_minor->index = minor_id; idr_replace(&drm_minors_idr, new_minor, minor_id); if (type == DRM_MINOR_LEGACY) { ret = drm_proc_init(new_minor, minor_id, drm_proc_root); if (ret) { DRM_ERROR("DRM: Failed to initialize /proc/dri.\n"); goto err_mem; } } else new_minor->dev_root = NULL; ret = drm_sysfs_device_add(new_minor); if (ret) { printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); goto err_g2; } *minor = new_minor; DRM_DEBUG("new minor assigned %d\n", minor_id); return 0; err_g2: if (new_minor->type == DRM_MINOR_LEGACY) drm_proc_cleanup(new_minor, drm_proc_root); err_mem: kfree(new_minor); err_idr: idr_remove(&drm_minors_idr, minor_id); *minor = NULL; return ret; } /** * Register. * * \param pdev - PCI device structure * \param ent entry from the PCI ID table with device type flags * \return zero on success or a negative number on failure. * * Attempt to gets inter module "drm" information. If we are first * then register the character device and inter module information. * Try and register, if we fail to register, backout previous work. */ int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver) { struct drm_device *dev; int ret; DRM_DEBUG("\n"); dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); if (!dev) return -ENOMEM; ret = pci_enable_device(pdev); if (ret) goto err_g1; pci_set_master(pdev); if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); goto err_g2; } if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY))) goto err_g2; DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name, driver->major, driver->minor, driver->patchlevel, driver->date, dev->primary->index); return 0; err_g2: pci_disable_device(pdev); err_g1: drm_free(dev, sizeof(*dev), DRM_MEM_STUB); return ret; } /** * Put a device minor number. * * \param dev device data structure * \return always zero * * Cleans up the proc resources. If it is the last minor then release the foreign * "drm" data, otherwise unregisters the "drm" data, frees the dev list and * unregisters the character device. */ int drm_put_dev(struct drm_device * dev) { DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name); if (dev->unique) { drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); dev->unique = NULL; dev->unique_len = 0; } if (dev->devname) { drm_free(dev->devname, strlen(dev->devname) + 1, DRM_MEM_DRIVER); dev->devname = NULL; } drm_free(dev, sizeof(*dev), DRM_MEM_STUB); return 0; } /** * Put a secondary minor number. * * \param sec_minor - structure to be released * \return always zero * * Cleans up the proc resources. Not legal for this to be the * last minor released. * */ int drm_put_minor(struct drm_minor **minor_p) { struct drm_minor *minor = *minor_p; DRM_DEBUG("release secondary minor %d\n", minor->index); if (minor->type == DRM_MINOR_LEGACY) drm_proc_cleanup(minor, drm_proc_root); drm_sysfs_device_remove(minor); idr_remove(&drm_minors_idr, minor->index); kfree(minor); *minor_p = NULL; return 0; }