diff options
Diffstat (limited to 'drivers/gpu/drm/drm_stub.c')
| -rw-r--r-- | drivers/gpu/drm/drm_stub.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c new file mode 100644 index 0000000..c2f584f --- /dev/null +++ b/drivers/gpu/drm/drm_stub.c @@ -0,0 +1,331 @@ +/** + * \file drm_stub.h + * Stub support + * + * \author Rickard E. (Rik) Faith <faith@valinux.com> + */ + +/* + * 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 <linux/module.h> +#include <linux/moduleparam.h> +#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; +} |
