| /** |
| * \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_cards_limit = 16; /* Enough for one machine */ |
| 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(cards_limit, "Maximum number of graphics cards"); |
| MODULE_PARM_DESC(debug, "Enable debug output"); |
| |
| module_param_named(cards_limit, drm_cards_limit, int, 0444); |
| module_param_named(debug, drm_debug, int, 0666); |
| |
| drm_head_t **drm_heads; |
| struct drm_sysfs_class *drm_class; |
| struct proc_dir_entry *drm_proc_root; |
| |
| static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver) |
| { |
| int retcode; |
| |
| spin_lock_init(&dev->count_lock); |
| init_timer( &dev->timer ); |
| sema_init( &dev->struct_sem, 1 ); |
| sema_init( &dev->ctxlist_sem, 1 ); |
| |
| 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; |
| |
| /* 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 (dev->driver->preinit) |
| if ((retcode = dev->driver->preinit(dev, ent->driver_data))) |
| goto error_out_unreg; |
| |
| 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 ); |
| } |
| } |
| |
| 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_takedown(dev); |
| return retcode; |
| } |
| |
| /** |
| * File \c open operation. |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * |
| * Puts the dev->fops corresponding to the device minor number into |
| * \p filp, call the \c open method, and restore the file operations. |
| */ |
| int drm_stub_open(struct inode *inode, struct file *filp) |
| { |
| drm_device_t *dev = NULL; |
| int minor = iminor(inode); |
| int err = -ENODEV; |
| struct file_operations *old_fops; |
| |
| DRM_DEBUG("\n"); |
| |
| if (!((minor >= 0) && (minor < drm_cards_limit))) |
| return -ENODEV; |
| |
| if (!drm_heads[minor]) |
| return -ENODEV; |
| |
| if (!(dev = drm_heads[minor]->dev)) |
| return -ENODEV; |
| |
| old_fops = filp->f_op; |
| filp->f_op = fops_get(&dev->driver->fops); |
| if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
| fops_put(filp->f_op); |
| filp->f_op = fops_get(old_fops); |
| } |
| fops_put(old_fops); |
| |
| return err; |
| } |
| |
| /** |
| * 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_head(drm_device_t *dev, drm_head_t *head) |
| { |
| drm_head_t **heads = drm_heads; |
| int ret; |
| int minor; |
| |
| DRM_DEBUG("\n"); |
| |
| for (minor = 0; minor < drm_cards_limit; minor++, heads++) { |
| if (!*heads) { |
| |
| *head = (drm_head_t) { |
| .dev = dev, |
| .device = MKDEV(DRM_MAJOR, minor), |
| .minor = minor, |
| }; |
| |
| if ((ret = drm_proc_init(dev, minor, drm_proc_root, &head->dev_root))) { |
| printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n"); |
| goto err_g1; |
| } |
| |
| |
| head->dev_class = drm_sysfs_device_add(drm_class, |
| MKDEV(DRM_MAJOR, |
| minor), |
| &dev->pdev->dev, |
| "card%d", minor); |
| if (IS_ERR(head->dev_class)) { |
| printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); |
| ret = PTR_ERR(head->dev_class); |
| goto err_g2; |
| } |
| *heads = head; |
| |
| DRM_DEBUG("new minor assigned %d\n", minor); |
| return 0; |
| } |
| } |
| DRM_ERROR("out of minors\n"); |
| return -ENOMEM; |
| err_g2: |
| drm_proc_cleanup(minor, drm_proc_root, head->dev_root); |
| err_g1: |
| *head = (drm_head_t) {.dev = 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) |
| { |
| drm_device_t *dev; |
| int ret; |
| |
| DRM_DEBUG("\n"); |
| |
| dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); |
| if (!dev) |
| return -ENOMEM; |
| |
| pci_enable_device(pdev); |
| |
| if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { |
| printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); |
| goto err_g1; |
| } |
| if ((ret = drm_get_head(dev, &dev->primary))) |
| goto err_g1; |
| |
| /* postinit is a required function to display the signon banner */ |
| /* drivers add secondary heads here if needed */ |
| if ((ret = dev->driver->postinit(dev, ent->driver_data))) |
| goto err_g1; |
| |
| return 0; |
| |
| err_g1: |
| drm_free(dev, sizeof(*dev), DRM_MEM_STUB); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_get_dev); |
| |
| /** |
| * 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(drm_device_t * 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_head(drm_head_t *head) |
| { |
| int minor = head->minor; |
| |
| DRM_DEBUG("release secondary minor %d\n", minor); |
| |
| drm_proc_cleanup(minor, drm_proc_root, head->dev_root); |
| drm_sysfs_device_remove(MKDEV(DRM_MAJOR, head->minor)); |
| |
| *head = (drm_head_t){.dev = NULL}; |
| |
| drm_heads[minor] = NULL; |
| |
| return 0; |
| } |
| |