/** * \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_cards_limit = 16; /* Enough for one machine */ unsigned int drm_debug = 0; /* 1 to enable debug output */ EXPORT_SYMBOL(drm_debug); MODULE_AUTHOR( DRIVER_AUTHOR ); MODULE_DESCRIPTION( DRIVER_DESC ); MODULE_LICENSE("GPL and additional rights"); MODULE_PARM_DESC(drm_cards_limit, "Maximum number of graphics cards"); MODULE_PARM_DESC(drm_debug, "Enable debug output"); module_param_named(cards_limit, drm_cards_limit, int, 0444); module_param_named(debug, drm_debug, int, 0666); drm_minor_t *drm_minors; 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)) { dev->agp = drm_agp_init(); 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; } dev->device = MKDEV(DRM_MAJOR, dev->minor ); /* postinit is a required function to display the signon banner */ if ((retcode = dev->driver->postinit(dev, ent->driver_data))) 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; dev = drm_minors[minor].dev; if (!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 device minor number. * * \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_probe(struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver *driver) { struct class_device *dev_class; drm_device_t *dev; int ret; int minor; drm_minor_t *minors = &drm_minors[0]; DRM_DEBUG("\n"); for (minor = 0; minor < drm_cards_limit; minor++, minors++) { if (minors->type == DRM_MINOR_FREE) { DRM_DEBUG("assigning minor %d\n", minor); dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); if (!dev) return -ENOMEM; *minors = (drm_minor_t){.dev = dev, .type=DRM_MINOR_PRIMARY}; dev->minor = minor; 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_proc_init(dev, minor, drm_proc_root, &minors->dev_root))) { printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n"); goto err_g1; } dev_class = drm_sysfs_device_add(drm_class, MKDEV(DRM_MAJOR, minor), &pdev->dev, "card%d", minor); if (IS_ERR(dev_class)) { printk(KERN_ERR "DRM: Error sysfs_device_add.\n"); ret = PTR_ERR(dev_class); goto err_g2; } 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, minors->dev_root); err_g1: *minors = (drm_minor_t){.dev = NULL, .type = DRM_MINOR_FREE}; drm_free(dev, sizeof(*dev), DRM_MEM_STUB); return ret; } EXPORT_SYMBOL(drm_probe); /** * Put a device minor number. * * \param minor minor number. * \return always zero. * * Cleans up the proc resources. If a minor is zero then release the foreign * "drm" data, otherwise unregisters the "drm" data, frees the stub list and * unregisters the character device. */ int drm_put_minor(drm_device_t *dev) { drm_minor_t *minors = &drm_minors[dev->minor]; DRM_DEBUG("release minor %d\n", dev->minor); drm_proc_cleanup(dev->minor, drm_proc_root, minors->dev_root); drm_sysfs_device_remove(MKDEV(DRM_MAJOR, dev->minor)); *minors = (drm_minor_t){.dev = NULL, .type = DRM_MINOR_FREE}; drm_free(dev, sizeof(*dev), DRM_MEM_STUB); return 0; }