source: rtems-libbsd/rtemsbsd/powerpc/include/linux/device.h @ 28ee86a

/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */
#ifndef _LINUX_DEVICE_H_
#define _LINUX_DEVICE_H_

#include <linux/types.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/sysfs.h>
#include <linux/kdev_t.h>
#include <linux/slab.h>
#include <asm/atomic.h>

#include <sys/bus.h>

enum irqreturn  { IRQ_NONE = 0, IRQ_HANDLED, IRQ_WAKE_THREAD, };
typedef enum irqreturn  irqreturn_t;

#include <stdio.h>

#include <linux/ioport.h>
#include <linux/of.h>

struct device {
        struct device_node *of_node;
        uintptr_t base;
        void *driver_data;
};

static inline void *
devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
{

        (void)dev;
        return (kmalloc(size, gfp));
}

static inline void *
devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
{

        (void)dev;
        return (kzalloc(size, gfp));
}

static inline void __iomem *
devm_ioremap(struct device *dev, resource_size_t offset, resource_size_t size)
{

        return (void __iomem *)(dev->base + (uintptr_t)offset);
}

#define devm_alloc_percpu(dev, type) \
    devm_kzalloc(dev, sizeof(type) * rtems_get_processor_count(), GFP_KERNEL)

#define dev_err(dev, fmt, ...) \
    do { (void)dev; fprintf(stderr, fmt, ##__VA_ARGS__); } while (0)

#define dev_warn(dev, fmt, ...) \
    do { (void)dev; fprintf(stderr, fmt, ##__VA_ARGS__); } while (0)

#define dev_info(dev, fmt, ...) \
    do { (void)dev; fprintf(stderr, fmt, ##__VA_ARGS__); } while (0)

static inline struct device *
get_device(struct device *dev)
{

        return (dev);
}

static inline void
put_device(struct device *dev)
{

        (void)dev;
}

static inline void *
dev_get_drvdata(const struct device *dev)
{

        return (dev->driver_data);
}

static inline void
dev_set_drvdata(struct device *dev, void *drvdata)
{

        dev->driver_data = drvdata;
}

#ifndef __rtems__
struct class {
        const char      *name;
        struct module   *owner;
        struct kobject  kobj;
        devclass_t      bsdclass;
        void            (*class_release)(struct class *class);
        void            (*dev_release)(struct device *dev);
        char *          (*devnode)(struct device *dev, umode_t *mode);
};

struct device {
        struct device   *parent;
        struct list_head irqents;
        device_t        bsddev;
        dev_t           devt;
        struct class    *class;
        void            (*release)(struct device *dev);
        struct kobject  kobj;
        uint64_t        *dma_mask;
        void            *driver_data;
        unsigned int    irq;
        unsigned int    msix;
        unsigned int    msix_max;
};

extern struct device linux_rootdev;
extern struct kobject class_root;

struct class_attribute {
        struct attribute attr;
        ssize_t (*show)(struct class *, struct class_attribute *, char *);
        ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t);
        const void *(*namespace)(struct class *, const struct class_attribute *);
};

#define CLASS_ATTR(_name, _mode, _show, _store)                         \
        struct class_attribute class_attr_##_name =                     \
            { { #_name, NULL, _mode }, _show, _store }

struct device_attribute {
        struct attribute        attr;
        ssize_t                 (*show)(struct device *,
                                        struct device_attribute *, char *);
        ssize_t                 (*store)(struct device *,
                                        struct device_attribute *, const char *,
                                        size_t);
};

#define DEVICE_ATTR(_name, _mode, _show, _store)                        \
        struct device_attribute dev_attr_##_name =                      \
            { { #_name, NULL, _mode }, _show, _store }

/* Simple class attribute that is just a static string */
struct class_attribute_string {
        struct class_attribute attr;
        char *str;
};

static inline ssize_t
show_class_attr_string(struct class *class,
                                struct class_attribute *attr, char *buf)
{
        struct class_attribute_string *cs;
        cs = container_of(attr, struct class_attribute_string, attr);
        return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
}

/* Currently read-only only */
#define _CLASS_ATTR_STRING(_name, _mode, _str) \
        { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
#define CLASS_ATTR_STRING(_name, _mode, _str) \
        struct class_attribute_string class_attr_##_name = \
                _CLASS_ATTR_STRING(_name, _mode, _str)

#define dev_err(dev, fmt, ...)  device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
#define dev_warn(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
#define dev_info(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
#define dev_printk(lvl, dev, fmt, ...)                                  \
            device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)

static inline void *
dev_get_drvdata(struct device *dev)
{

        return dev->driver_data;
}

static inline void
dev_set_drvdata(struct device *dev, void *data)
{

        dev->driver_data = data;
}

static inline struct device *
get_device(struct device *dev)
{

        if (dev)
                kobject_get(&dev->kobj);

        return (dev);
}

static inline char *
dev_name(const struct device *dev)
{

        return kobject_name(&dev->kobj);
}

#define dev_set_name(_dev, _fmt, ...)                                   \
        kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__)

static inline void
put_device(struct device *dev)
{

        if (dev)
                kobject_put(&dev->kobj);
}

static inline ssize_t
class_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
        struct class_attribute *dattr;
        ssize_t error;

        dattr = container_of(attr, struct class_attribute, attr);
        error = -EIO;
        if (dattr->show)
                error = dattr->show(container_of(kobj, struct class, kobj),
                    dattr, buf);
        return (error);
}

static inline ssize_t
class_store(struct kobject *kobj, struct attribute *attr, const char *buf,
    size_t count)
{
        struct class_attribute *dattr;
        ssize_t error;

        dattr = container_of(attr, struct class_attribute, attr);
        error = -EIO;
        if (dattr->store)
                error = dattr->store(container_of(kobj, struct class, kobj),
                    dattr, buf, count);
        return (error);
}

static inline void
class_release(struct kobject *kobj)
{
        struct class *class;

        class = container_of(kobj, struct class, kobj);
        if (class->class_release)
                class->class_release(class);
}

static struct sysfs_ops class_sysfs = {
        .show  = class_show,
        .store = class_store,
};
static struct kobj_type class_ktype = {
        .release = class_release,
        .sysfs_ops = &class_sysfs
};

static inline int
class_register(struct class *class)
{

        class->bsdclass = devclass_create(class->name);
        kobject_init(&class->kobj, &class_ktype);
        kobject_set_name(&class->kobj, class->name);
        kobject_add(&class->kobj, &class_root, class->name);

        return (0);
}

static inline void
class_unregister(struct class *class)
{

        kobject_put(&class->kobj);
}

static inline void
device_release(struct kobject *kobj)
{
        struct device *dev;

        dev = container_of(kobj, struct device, kobj);
        /* This is the precedence defined by linux. */
        if (dev->release)
                dev->release(dev);
        else if (dev->class && dev->class->dev_release)
                dev->class->dev_release(dev);
}

static inline ssize_t
dev_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
        struct device_attribute *dattr;
        ssize_t error;

        dattr = container_of(attr, struct device_attribute, attr);
        error = -EIO;
        if (dattr->show)
                error = dattr->show(container_of(kobj, struct device, kobj),
                    dattr, buf);
        return (error);
}

static inline ssize_t
dev_store(struct kobject *kobj, struct attribute *attr, const char *buf,
    size_t count)
{
        struct device_attribute *dattr;
        ssize_t error;

        dattr = container_of(attr, struct device_attribute, attr);
        error = -EIO;
        if (dattr->store)
                error = dattr->store(container_of(kobj, struct device, kobj),
                    dattr, buf, count);
        return (error);
}

static struct sysfs_ops dev_sysfs = { .show  = dev_show, .store = dev_store, };
static struct kobj_type dev_ktype = {
        .release = device_release,
        .sysfs_ops = &dev_sysfs
};

/*
 * Devices are registered and created for exporting to sysfs.  create
 * implies register and register assumes the device fields have been
 * setup appropriately before being called.
 */
static inline int
device_register(struct device *dev)
{
        device_t bsddev;
        int unit;

        bsddev = NULL;
        if (dev->devt) {
                unit = MINOR(dev->devt);
                bsddev = devclass_get_device(dev->class->bsdclass, unit);
        } else
                unit = -1;
        if (bsddev == NULL)
                bsddev = device_add_child(dev->parent->bsddev,
                    dev->class->kobj.name, unit);
        if (bsddev) {
                if (dev->devt == 0)
                        dev->devt = makedev(0, device_get_unit(bsddev));
                device_set_softc(bsddev, dev);
        }
        dev->bsddev = bsddev;
        kobject_init(&dev->kobj, &dev_ktype);
        kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));

        return (0);
}

static inline void
device_unregister(struct device *dev)
{
        device_t bsddev;

        bsddev = dev->bsddev;
        mtx_lock(&Giant);
        if (bsddev)
                device_delete_child(device_get_parent(bsddev), bsddev);
        mtx_unlock(&Giant);
        put_device(dev);
}

struct device *device_create(struct class *class, struct device *parent,
            dev_t devt, void *drvdata, const char *fmt, ...);

static inline void
device_destroy(struct class *class, dev_t devt)
{
        device_t bsddev;
        int unit;

        unit = MINOR(devt);
        bsddev = devclass_get_device(class->bsdclass, unit);
        if (bsddev)
                device_unregister(device_get_softc(bsddev));
}

static inline void
class_kfree(struct class *class)
{

        kfree(class);
}

static inline struct class *
class_create(struct module *owner, const char *name)
{
        struct class *class;
        int error;

        class = kzalloc(sizeof(*class), M_WAITOK);
        class->owner = owner;
        class->name= name;
        class->class_release = class_kfree;
        error = class_register(class);
        if (error) {
                kfree(class);
                return (NULL);
        }

        return (class);
}

static inline void
class_destroy(struct class *class)
{

        if (class == NULL)
                return;
        class_unregister(class);
}

static inline int
device_create_file(struct device *dev, const struct device_attribute *attr)
{

        if (dev)
                return sysfs_create_file(&dev->kobj, &attr->attr);
        return -EINVAL;
}

static inline void
device_remove_file(struct device *dev, const struct device_attribute *attr)
{

        if (dev)
                sysfs_remove_file(&dev->kobj, &attr->attr);
}

static inline int
class_create_file(struct class *class, const struct class_attribute *attr)
{

        if (class)
                return sysfs_create_file(&class->kobj, &attr->attr);
        return -EINVAL;
}

static inline void
class_remove_file(struct class *class, const struct class_attribute *attr)
{

        if (class)
                sysfs_remove_file(&class->kobj, &attr->attr);
}

static inline int dev_to_node(struct device *dev)
{
                return -1;
}

char *kvasprintf(gfp_t, const char *, va_list);
char *kasprintf(gfp_t, const char *, ...);
#endif /* __rtems__ */

#endif  /* _LINUX_DEVICE_H_ */