Add new sysfs support files
Jon Smirl
parent
c158a36c4c
commit
55c5e24089
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@ -0,0 +1,44 @@
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/*
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* Copyright 2004 Jon Smirl <jonsmirl@gmail.com>
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* Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
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* Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "drm_auth.h"
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#include "drm_agpsupport.h"
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#include "drm_bufs.h"
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#include "drm_context.h"
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#include "drm_dma.h"
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#include "drm_irq.h"
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#include "drm_drawable.h"
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#include "drm_drv.h"
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#include "drm_fops.h"
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#include "drm_init.h"
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#include "drm_ioctl.h"
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#include "drm_lock.h"
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#include "drm_memory.h"
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#include "drm_pci.h"
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#include "drm_proc.h"
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#include "drm_vm.h"
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#include "drm_sysfs.h"
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#include "drm_stub.h"
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#include "drm_scatter.h"
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@ -0,0 +1,44 @@
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/*
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* Copyright 2004 Jon Smirl <jonsmirl@gmail.com>
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* Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
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* Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "drm_auth.h"
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#include "drm_agpsupport.h"
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#include "drm_bufs.h"
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#include "drm_context.h"
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#include "drm_dma.h"
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#include "drm_irq.h"
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#include "drm_drawable.h"
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#include "drm_drv.h"
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#include "drm_fops.h"
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#include "drm_init.h"
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#include "drm_ioctl.h"
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#include "drm_lock.h"
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#include "drm_memory.h"
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#include "drm_pci.h"
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#include "drm_proc.h"
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#include "drm_vm.h"
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#include "drm_sysfs.h"
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#include "drm_stub.h"
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#include "drm_scatter.h"
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
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/*
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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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* does not allow adding attributes.
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*
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* Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com>
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* Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (c) 2003-2004 IBM Corp.
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*
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* This file is released under the GPLv2
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*
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*/
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#include <linux/config.h>
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#include <linux/device.h>
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#include <linux/kdev_t.h>
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#include <linux/err.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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struct list_head node;
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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 LIST_HEAD(simple_dev_list);
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static spinlock_t simple_dev_list_lock = SPIN_LOCK_UNLOCKED;
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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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static ssize_t version_show(struct class *dev, char *buf)
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{
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return sprintf(buf, "fixme for drm_core %s %d.%d.%d %s\n", DRIVER_NAME, DRIVER_MAJOR,
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DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE);
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}
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static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
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/**
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* DRM(sysfs_create) - create a struct drm_sysfs_class structure
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* @owner: pointer to the module that is to "own" this struct drm_sysfs_class
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* @name: pointer to a string for the name of this class.
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*
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* This is used to create a struct drm_sysfs_class pointer that can then be used
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* in calls to DRM(sysfs_device_add)().
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*
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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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*/
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struct drm_sysfs_class *DRM(sysfs_create)(struct module *owner, char *name)
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{
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struct drm_sysfs_class *cs;
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int retval;
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cs = kmalloc(sizeof(*cs), GFP_KERNEL);
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if (!cs) {
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retval = -ENOMEM;
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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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cs->class.class_release = drm_sysfs_class_release;
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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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* DRM(sysfs_destroy) - destroys a struct drm_sysfs_class structure
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* @cs: pointer to the struct drm_sysfs_class that is to be destroyed
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*
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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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*/
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void DRM(sysfs_destroy)(struct drm_sysfs_class *cs)
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{
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if ((cs == NULL) || (IS_ERR(cs)))
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return;
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class_unregister(&cs->class);
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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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* @cs: pointer to the struct drm_sysfs_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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* @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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*
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* A struct class_device will be created in sysfs, registered to the specified
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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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* 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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* created with a call to DRM(sysfs_create)().
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*/
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struct class_device *DRM(sysfs_device_add)(struct drm_sysfs_class *cs, dev_t dev, struct device *device, const char *fmt, ...)
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{
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va_list args;
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struct simple_dev *s_dev = NULL;
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int retval;
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if ((cs == NULL) || (IS_ERR(cs))) {
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retval = -ENODEV;
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goto error;
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}
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s_dev = kmalloc(sizeof(*s_dev), GFP_KERNEL);
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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 = dev;
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s_dev->class_dev.dev = device;
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s_dev->class_dev.class = &cs->class;
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va_start(args, fmt);
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vsnprintf(s_dev->class_dev.class_id, BUS_ID_SIZE, fmt, args);
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va_end(args);
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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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spin_lock(&simple_dev_list_lock);
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list_add(&s_dev->node, &simple_dev_list);
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spin_unlock(&simple_dev_list_lock);
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return &s_dev->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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* DRM(sysfs_device_remove) - removes a class device that was created with DRM(sysfs_device_add)()
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* @dev: the dev_t of the device that was previously registered.
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*
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* This call unregisters and cleans up a class device that was created with a
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* call to DRM(sysfs_device_add)()
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*/
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void DRM(sysfs_device_remove)(dev_t dev)
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{
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struct simple_dev *s_dev = NULL;
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int found = 0;
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spin_lock(&simple_dev_list_lock);
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list_for_each_entry(s_dev, &simple_dev_list, node) {
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if (s_dev->dev == dev) {
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found = 1;
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break;
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}
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}
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if (found) {
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list_del(&s_dev->node);
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spin_unlock(&simple_dev_list_lock);
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class_device_unregister(&s_dev->class_dev);
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} else {
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spin_unlock(&simple_dev_list_lock);
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}
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}
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#endif
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