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

Age	Commit message (Expand)	Author
2006-12-01	Track linux-core symlinks in git.	Michel Dänzer

/* * drm_sysfs.c - Modifications to drm_sysfs_class.c to support * extra sysfs attribute from DRM. Normal drm_sysfs_class * does not allow adding attributes. * * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com> * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> * Copyright (c) 2003-2004 IBM Corp. * * This file is released under the GPLv2 * */ #include <linux/device.h> #include <linux/kdev_t.h> #include <linux/err.h> #include "drm_core.h" #include "drmP.h" #define to_drm_device(d) container_of(d, struct drm_device, dev) /** * drm_sysfs_suspend - DRM class suspend hook * @dev: Linux device to suspend * @state: power state to enter * * Just figures out what the actual struct drm_device associated with * @dev is and calls its suspend hook, if present. */ static int drm_sysfs_suspend(struct device *dev, pm_message_t state) { struct drm_device *drm_dev = to_drm_device(dev); printk(KERN_ERR "%s\n", __FUNCTION__); if (drm_dev->driver->suspend) return drm_dev->driver->suspend(drm_dev); return 0; } /** * drm_sysfs_resume - DRM class resume hook * @dev: Linux device to resume * * Just figures out what the actual struct drm_device associated with * @dev is and calls its resume hook, if present. */ static int drm_sysfs_resume(struct device *dev) { struct drm_device *drm_dev = to_drm_device(dev); if (drm_dev->driver->resume) return drm_dev->driver->resume(drm_dev); return 0; } /* Display the version of drm_core. This doesn't work right in current design */ static ssize_t version_show(struct class *dev, char *buf) { return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); } static CLASS_ATTR(version, S_IRUGO, version_show, NULL); /** * drm_sysfs_create - create a struct drm_sysfs_class structure * @owner: pointer to the module that is to "own" this struct drm_sysfs_class * @name: pointer to a string for the name of this class. * * This is used to create DRM class pointer that can then be used * in calls to drm_sysfs_device_add(). * * Note, the pointer created here is to be destroyed when finished by making a * call to drm_sysfs_destroy(). */ struct class *drm_sysfs_create(struct module *owner, char *name) { struct class *class; int err; class = class_create(owner, name); if (IS_ERR(class)) { err = PTR_ERR(class); goto err_out; } #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)) class->suspend = drm_sysfs_suspend; class->resume = drm_sysfs_resume; #endif err = class_create_file(class, &class_attr_version); if (err) goto err_out_class; return class; err_out_class: class_destroy(class); err_out: return ERR_PTR(err); } /** * drm_sysfs_destroy - destroys DRM class * * Destroy the DRM device class. */ void drm_sysfs_destroy(void) { if ((drm_class == NULL) || (IS_ERR(drm_class))) return; class_remove_file(drm_class, &class_attr_version); class_destroy(drm_class); } static ssize_t show_dri(struct device *device, struct device_attribute *attr, char *buf) { struct drm_device *dev = to_drm_device(device); if (dev->driver->dri_library_name) return dev->driver->dri_library_name(dev, buf); return snprintf(buf, PAGE_SIZE, "%s\n", dev->driver->pci_driver.name); } static struct device_attribute device_attrs[] = { __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), }; /** * drm_sysfs_device_release - do nothing * @dev: Linux device * * Normally, this would free the DRM device associated with @dev, along * with cleaning up any other stuff. But we do that in the DRM core, so * this function can just return and hope that the core does its job. */ static void drm_sysfs_device_release(struct device *dev) { return; } /** * drm_sysfs_device_add - adds a class device to sysfs for a character driver * @dev: DRM device to be added * @head: DRM head in question * * Add a DRM device to the DRM's device model class. We use @dev's PCI device * as the parent for the Linux device, and make sure it has a file containing * the driver we're using (for userspace compatibility). */ int drm_sysfs_device_add(struct drm_device *dev, struct drm_head *head) { int err; int i, j; dev->dev.parent = &dev->pdev->dev; dev->dev.class = drm_class; dev->dev.release = drm_sysfs_device_release; /* * This will actually add the major:minor file so that udev * will create the device node. We don't want to do that just * yet... */ /* dev->dev.devt = head->device; */ snprintf(dev->dev.bus_id, BUS_ID_SIZE, "card%d", head->minor); err = device_register(&dev->dev); if (err) { DRM_ERROR("device add failed: %d\n", err); goto err_out; } for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { err = device_create_file(&dev->dev, &device_attrs[i]); if (err) goto err_out_files; } return 0; err_out_files: if (i > 0) for (j = 0; j < i; j++) device_remove_file(&dev->dev, &device_attrs[i]); device_unregister(&dev->dev); err_out: return err; } /** * drm_sysfs_device_remove - remove DRM device * @dev: DRM device to remove * * This call unregisters and cleans up a class device that was created with a * call to drm_sysfs_device_add() */ void drm_sysfs_device_remove(struct drm_device *dev) { int i; for (i = 0; i < ARRAY_SIZE(device_attrs); i++) device_remove_file(&dev->dev, &device_attrs[i]); device_unregister(&dev->dev); }