[PATCH] DRM: fix up classdev interface for drm core
Current drm code doesn't work with userspace programs that listen only to the kernel event netlink socket as it is trying to create its own dev interface. Turns out lots of code can just be deleted as the driver core can do all of this work automatically for you. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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f67d115fe4
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0650fd5824
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@ -980,7 +980,7 @@ extern int drm_put_head(drm_head_t * head);
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extern unsigned int drm_debug;
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extern unsigned int drm_debug;
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extern unsigned int drm_cards_limit;
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extern unsigned int drm_cards_limit;
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extern drm_head_t **drm_heads;
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extern drm_head_t **drm_heads;
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extern struct drm_sysfs_class *drm_class;
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extern struct class *drm_class;
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extern struct proc_dir_entry *drm_proc_root;
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extern struct proc_dir_entry *drm_proc_root;
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/* Proc support (drm_proc.h) */
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/* Proc support (drm_proc.h) */
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@ -1011,11 +1011,9 @@ extern void __drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah);
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extern void drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah);
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extern void drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah);
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/* sysfs support (drm_sysfs.c) */
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/* sysfs support (drm_sysfs.c) */
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struct drm_sysfs_class;
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extern struct class *drm_sysfs_create(struct module *owner, char *name);
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extern struct drm_sysfs_class *drm_sysfs_create(struct module *owner,
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extern void drm_sysfs_destroy(struct class *cs);
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char *name);
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extern struct class_device *drm_sysfs_device_add(struct class *cs,
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extern void drm_sysfs_destroy(struct drm_sysfs_class *cs);
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extern struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
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drm_head_t *head);
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drm_head_t *head);
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extern void drm_sysfs_device_remove(struct class_device *class_dev);
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extern void drm_sysfs_device_remove(struct class_device *class_dev);
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@ -50,7 +50,7 @@ module_param_named(cards_limit, drm_cards_limit, int, 0444);
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module_param_named(debug, drm_debug, int, 0600);
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module_param_named(debug, drm_debug, int, 0600);
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drm_head_t **drm_heads;
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drm_head_t **drm_heads;
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struct drm_sysfs_class *drm_class;
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struct class *drm_class;
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struct proc_dir_entry *drm_proc_root;
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struct proc_dir_entry *drm_proc_root;
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static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
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static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
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@ -1,3 +1,4 @@
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/*
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/*
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* drm_sysfs.c - Modifications to drm_sysfs_class.c to support
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* drm_sysfs.c - Modifications to drm_sysfs_class.c to support
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* extra sysfs attribute from DRM. Normal drm_sysfs_class
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* extra sysfs attribute from DRM. Normal drm_sysfs_class
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@ -19,36 +20,6 @@
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#include "drm_core.h"
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#include "drm_core.h"
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#include "drmP.h"
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#include "drmP.h"
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struct drm_sysfs_class {
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struct class_device_attribute attr;
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struct class class;
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};
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#define to_drm_sysfs_class(d) container_of(d, struct drm_sysfs_class, class)
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struct simple_dev {
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dev_t dev;
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struct class_device class_dev;
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};
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#define to_simple_dev(d) container_of(d, struct simple_dev, class_dev)
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static void release_simple_dev(struct class_device *class_dev)
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{
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struct simple_dev *s_dev = to_simple_dev(class_dev);
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kfree(s_dev);
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}
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static ssize_t show_dev(struct class_device *class_dev, char *buf)
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{
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struct simple_dev *s_dev = to_simple_dev(class_dev);
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return print_dev_t(buf, s_dev->dev);
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}
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static void drm_sysfs_class_release(struct class *class)
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{
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struct drm_sysfs_class *cs = to_drm_sysfs_class(class);
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kfree(cs);
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}
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/* Display the version of drm_core. This doesn't work right in current design */
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/* Display the version of drm_core. This doesn't work right in current design */
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static ssize_t version_show(struct class *dev, char *buf)
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static ssize_t version_show(struct class *dev, char *buf)
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{
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{
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@ -69,38 +40,16 @@ static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
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* Note, the pointer created here is to be destroyed when finished by making a
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* Note, the pointer created here is to be destroyed when finished by making a
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* call to drm_sysfs_destroy().
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* call to drm_sysfs_destroy().
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*/
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*/
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struct drm_sysfs_class *drm_sysfs_create(struct module *owner, char *name)
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struct class *drm_sysfs_create(struct module *owner, char *name)
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{
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{
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struct drm_sysfs_class *cs;
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struct class *class;
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int retval;
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cs = kmalloc(sizeof(*cs), GFP_KERNEL);
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class = class_create(owner, name);
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if (!cs) {
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if (!class)
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retval = -ENOMEM;
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return class;
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goto error;
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}
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memset(cs, 0x00, sizeof(*cs));
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cs->class.name = name;
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class_create_file(class, &class_attr_version);
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cs->class.class_release = drm_sysfs_class_release;
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return class;
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cs->class.release = release_simple_dev;
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cs->attr.attr.name = "dev";
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cs->attr.attr.mode = S_IRUGO;
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cs->attr.attr.owner = owner;
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cs->attr.show = show_dev;
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cs->attr.store = NULL;
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retval = class_register(&cs->class);
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if (retval)
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goto error;
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class_create_file(&cs->class, &class_attr_version);
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return cs;
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error:
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kfree(cs);
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return ERR_PTR(retval);
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}
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}
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/**
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/**
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@ -110,12 +59,13 @@ struct drm_sysfs_class *drm_sysfs_create(struct module *owner, char *name)
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* Note, the pointer to be destroyed must have been created with a call to
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* Note, the pointer to be destroyed must have been created with a call to
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* drm_sysfs_create().
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* drm_sysfs_create().
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*/
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*/
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void drm_sysfs_destroy(struct drm_sysfs_class *cs)
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void drm_sysfs_destroy(struct class *class)
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{
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{
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if ((cs == NULL) || (IS_ERR(cs)))
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if ((class == NULL) || (IS_ERR(class)))
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return;
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return;
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class_unregister(&cs->class);
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class_remove_file(class, &class_attr_version);
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class_destroy(class);
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}
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}
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static ssize_t show_dri(struct class_device *class_device, char *buf)
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static ssize_t show_dri(struct class_device *class_device, char *buf)
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@ -132,7 +82,7 @@ static struct class_device_attribute class_device_attrs[] = {
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/**
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/**
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* drm_sysfs_device_add - adds a class device to sysfs for a character driver
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* drm_sysfs_device_add - adds a class device to sysfs for a character driver
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* @cs: pointer to the struct drm_sysfs_class that this device should be registered to.
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* @cs: pointer to the struct class that this device should be registered to.
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* @dev: the dev_t for the device to be added.
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* @dev: the dev_t for the device to be added.
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* @device: a pointer to a struct device that is assiociated with this class device.
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* @device: a pointer to a struct device that is assiociated with this class device.
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* @fmt: string for the class device's name
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* @fmt: string for the class device's name
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@ -141,46 +91,26 @@ static struct class_device_attribute class_device_attrs[] = {
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* class. A "dev" file will be created, showing the dev_t for the device. The
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* class. A "dev" file will be created, showing the dev_t for the device. The
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* pointer to the struct class_device will be returned from the call. Any further
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* pointer to the struct class_device will be returned from the call. Any further
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* sysfs files that might be required can be created using this pointer.
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* sysfs files that might be required can be created using this pointer.
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* Note: the struct drm_sysfs_class passed to this function must have previously been
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* Note: the struct class passed to this function must have previously been
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* created with a call to drm_sysfs_create().
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* created with a call to drm_sysfs_create().
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*/
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*/
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struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
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struct class_device *drm_sysfs_device_add(struct class *cs, drm_head_t *head)
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drm_head_t *head)
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{
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{
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struct simple_dev *s_dev = NULL;
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struct class_device *class_dev;
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int i, retval;
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int i;
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if ((cs == NULL) || (IS_ERR(cs))) {
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class_dev = class_device_create(cs, NULL,
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retval = -ENODEV;
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MKDEV(DRM_MAJOR, head->minor),
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goto error;
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&(head->dev->pdev)->dev,
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}
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"card%d", head->minor);
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if (!class_dev)
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return NULL;
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s_dev = kmalloc(sizeof(*s_dev), GFP_KERNEL);
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class_set_devdata(class_dev, head);
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if (!s_dev) {
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retval = -ENOMEM;
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goto error;
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}
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memset(s_dev, 0x00, sizeof(*s_dev));
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s_dev->dev = MKDEV(DRM_MAJOR, head->minor);
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s_dev->class_dev.dev = &(head->dev->pdev)->dev;
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s_dev->class_dev.class = &cs->class;
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snprintf(s_dev->class_dev.class_id, BUS_ID_SIZE, "card%d", head->minor);
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retval = class_device_register(&s_dev->class_dev);
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if (retval)
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goto error;
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class_device_create_file(&s_dev->class_dev, &cs->attr);
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class_set_devdata(&s_dev->class_dev, head);
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for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
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for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
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class_device_create_file(&s_dev->class_dev, &class_device_attrs[i]);
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class_device_create_file(class_dev, &class_device_attrs[i]);
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return &s_dev->class_dev;
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return class_dev;
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error:
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kfree(s_dev);
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return ERR_PTR(retval);
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}
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}
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/**
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/**
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@ -192,10 +122,9 @@ error:
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*/
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*/
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void drm_sysfs_device_remove(struct class_device *class_dev)
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void drm_sysfs_device_remove(struct class_device *class_dev)
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{
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{
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struct simple_dev *s_dev = to_simple_dev(class_dev);
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int i;
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int i;
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for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
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for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
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class_device_remove_file(&s_dev->class_dev, &class_device_attrs[i]);
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class_device_remove_file(class_dev, &class_device_attrs[i]);
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class_device_unregister(&s_dev->class_dev);
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class_device_unregister(class_dev);
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}
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}
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