pcmcia_ioctl.c 21.7 KB
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/*
 * pcmcia_ioctl.c -- ioctl interface for cardmgr and cardctl
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 * (C) 1999		David A. Hinds
 * (C) 2003 - 2004	Dominik Brodowski
 */

/*
 * This file will go away soon.
 */


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#include <linux/kernel.h>
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#include <linux/module.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/ioctl.h>
#include <linux/proc_fs.h>
#include <linux/poll.h>
#include <linux/pci.h>
#include <linux/workqueue.h>

#define IN_CARD_SERVICES
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ss.h>

#include "cs_internal.h"
#include "ds_internal.h"

static int major_dev = -1;


/* Device user information */
#define MAX_EVENTS	32
#define USER_MAGIC	0x7ea4
#define CHECK_USER(u) \
    (((u) == NULL) || ((u)->user_magic != USER_MAGIC))

typedef struct user_info_t {
	u_int			user_magic;
	int			event_head, event_tail;
	event_t			event[MAX_EVENTS];
	struct user_info_t	*next;
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	struct pcmcia_socket	*socket;
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} user_info_t;


#ifdef DEBUG
extern int ds_pc_debug;

#define ds_dbg(lvl, fmt, arg...) do {		\
	if (ds_pc_debug >= lvl)				\
		printk(KERN_DEBUG "ds: " fmt , ## arg);		\
} while (0)
#else
#define ds_dbg(lvl, fmt, arg...) do { } while (0)
#endif

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static struct pcmcia_device *get_pcmcia_device(struct pcmcia_socket *s,
						unsigned int function)
{
	struct pcmcia_device *p_dev = NULL;
	unsigned long flags;

	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
		if (p_dev->func == function) {
			spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
			return pcmcia_get_dev(p_dev);
		}
	}
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
	return NULL;
}
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/* backwards-compatible accessing of driver --- by name! */

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static struct pcmcia_driver *get_pcmcia_driver(dev_info_t *dev_info)
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{
	struct device_driver *drv;
	struct pcmcia_driver *p_drv;

	drv = driver_find((char *) dev_info, &pcmcia_bus_type);
	if (!drv)
		return NULL;

	p_drv = container_of(drv, struct pcmcia_driver, drv);

	return (p_drv);
}


#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_pccard = NULL;

static int proc_read_drivers_callback(struct device_driver *driver, void *d)
{
	char **p = d;
	struct pcmcia_driver *p_drv = container_of(driver,
						   struct pcmcia_driver, drv);

	*p += sprintf(*p, "%-24.24s 1 %d\n", p_drv->drv.name,
#ifdef CONFIG_MODULE_UNLOAD
		      (p_drv->owner) ? module_refcount(p_drv->owner) : 1
#else
		      1
#endif
	);
	d = (void *) p;

	return 0;
}

static int proc_read_drivers(char *buf, char **start, off_t pos,
			     int count, int *eof, void *data)
{
	char *p = buf;
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	int rc;
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	rc = bus_for_each_drv(&pcmcia_bus_type, NULL,
			      (void *) &p, proc_read_drivers_callback);
	if (rc < 0)
		return rc;
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	return (p - buf);
}
#endif

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#ifdef CONFIG_PCMCIA_PROBE

static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
{
	int irq;
	u32 mask;

	irq = adj->resource.irq.IRQ;
	if ((irq < 0) || (irq > 15))
		return CS_BAD_IRQ;

	if (adj->Action != REMOVE_MANAGED_RESOURCE)
		return 0;

	mask = 1 << irq;

	if (!(s->irq_mask & mask))
		return 0;

	s->irq_mask &= ~mask;

	return 0;
}

#else

static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
	return CS_SUCCESS;
}

#endif

static int pcmcia_adjust_resource_info(adjust_t *adj)
{
	struct pcmcia_socket *s;
	int ret = CS_UNSUPPORTED_FUNCTION;
	unsigned long flags;

	down_read(&pcmcia_socket_list_rwsem);
	list_for_each_entry(s, &pcmcia_socket_list, socket_list) {

		if (adj->Resource == RES_IRQ)
			ret = adjust_irq(s, adj);

		else if (s->resource_ops->add_io) {
			unsigned long begin, end;

			/* you can't use the old interface if the new
			 * one was used before */
			spin_lock_irqsave(&s->lock, flags);
			if ((s->resource_setup_new) &&
			    !(s->resource_setup_old)) {
				spin_unlock_irqrestore(&s->lock, flags);
				continue;
			} else if (!(s->resource_setup_old))
				s->resource_setup_old = 1;
			spin_unlock_irqrestore(&s->lock, flags);

			switch (adj->Resource) {
			case RES_MEMORY_RANGE:
				begin = adj->resource.memory.Base;
				end = adj->resource.memory.Base + adj->resource.memory.Size - 1;
				if (s->resource_ops->add_mem)
					ret =s->resource_ops->add_mem(s, adj->Action, begin, end);
			case RES_IO_RANGE:
				begin = adj->resource.io.BasePort;
				end = adj->resource.io.BasePort + adj->resource.io.NumPorts - 1;
				if (s->resource_ops->add_io)
					ret = s->resource_ops->add_io(s, adj->Action, begin, end);
			}
			if (!ret) {
				/* as there's no way we know this is the
				 * last call to adjust_resource_info, we
				 * always need to assume this is the latest
				 * one... */
				spin_lock_irqsave(&s->lock, flags);
				s->resource_setup_done = 1;
				spin_unlock_irqrestore(&s->lock, flags);
			}
		}
	}
	up_read(&pcmcia_socket_list_rwsem);

	return (ret);
}


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/*======================================================================

    These manage a ring buffer of events pending for one user process

======================================================================*/


static int queue_empty(user_info_t *user)
{
    return (user->event_head == user->event_tail);
}

static event_t get_queued_event(user_info_t *user)
{
    user->event_tail = (user->event_tail+1) % MAX_EVENTS;
    return user->event[user->event_tail];
}

static void queue_event(user_info_t *user, event_t event)
{
    user->event_head = (user->event_head+1) % MAX_EVENTS;
    if (user->event_head == user->event_tail)
	user->event_tail = (user->event_tail+1) % MAX_EVENTS;
    user->event[user->event_head] = event;
}

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void handle_event(struct pcmcia_socket *s, event_t event)
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{
    user_info_t *user;
    for (user = s->user; user; user = user->next)
	queue_event(user, event);
    wake_up_interruptible(&s->queue);
}


/*======================================================================

    bind_request() and bind_device() are merged by now. Register_client()
    is called right at the end of bind_request(), during the driver's
    ->attach() call. Individual descriptions:

    bind_request() connects a socket to a particular client driver.
    It looks up the specified device ID in the list of registered
    drivers, binds it to the socket, and tries to create an instance
    of the device.  unbind_request() deletes a driver instance.

    Bind_device() associates a device driver with a particular socket.
    It is normally called by Driver Services after it has identified
    a newly inserted card.  An instance of that driver will then be
    eligible to register as a client of this socket.

    Register_client() uses the dev_info_t handle to match the
    caller with a socket.  The driver must have already been bound
    to a socket with bind_device() -- in fact, bind_device()
    allocates the client structure that will be used.

======================================================================*/

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static int bind_request(struct pcmcia_socket *s, bind_info_t *bind_info)
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{
	struct pcmcia_driver *p_drv;
	struct pcmcia_device *p_dev;
	int ret = 0;
	unsigned long flags;

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	s = pcmcia_get_socket(s);
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	if (!s)
		return -EINVAL;

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	ds_dbg(2, "bind_request(%d, '%s')\n", s->sock,
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	       (char *)bind_info->dev_info);

	p_drv = get_pcmcia_driver(&bind_info->dev_info);
	if (!p_drv) {
		ret = -EINVAL;
		goto err_put;
	}

	if (!try_module_get(p_drv->owner)) {
		ret = -EINVAL;
		goto err_put_driver;
	}

	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
        list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
		if (p_dev->func == bind_info->function) {
			if ((p_dev->dev.driver == &p_drv->drv)) {
				if (p_dev->cardmgr) {
					/* if there's already a device
					 * registered, and it was registered
					 * by userspace before, we need to
					 * return the "instance". */
					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
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					bind_info->instance = p_dev;
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					ret = -EBUSY;
					goto err_put_module;
				} else {
					/* the correct driver managed to bind
					 * itself magically to the correct
					 * device. */
					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
					p_dev->cardmgr = p_drv;
					ret = 0;
					goto err_put_module;
				}
			} else if (!p_dev->dev.driver) {
				/* there's already a device available where
				 * no device has been bound to yet. So we don't
				 * need to register a device! */
				spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
				goto rescan;
			}
		}
	}
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

	p_dev = pcmcia_device_add(s, bind_info->function);
	if (!p_dev) {
		ret = -EIO;
		goto err_put_module;
	}

rescan:
	p_dev->cardmgr = p_drv;

	/* if a driver is already running, we can abort */
	if (p_dev->dev.driver)
		goto err_put_module;

	/*
	 * Prevent this racing with a card insertion.
	 */
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	mutex_lock(&s->skt_mutex);
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	ret = bus_rescan_devices(&pcmcia_bus_type);
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	mutex_unlock(&s->skt_mutex);
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	if (ret)
		goto err_put_module;
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	/* check whether the driver indeed matched. I don't care if this
	 * is racy or not, because it can only happen on cardmgr access
	 * paths...
	 */
	if (!(p_dev->dev.driver == &p_drv->drv))
		p_dev->cardmgr = NULL;

 err_put_module:
	module_put(p_drv->owner);
 err_put_driver:
	put_driver(&p_drv->drv);
 err_put:
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	pcmcia_put_socket(s);
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	return (ret);
} /* bind_request */

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#ifdef CONFIG_CARDBUS

static struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s)
{
	if (!s || !(s->state & SOCKET_CARDBUS))
		return NULL;
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	return s->cb_dev->subordinate;
}
#endif
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static int get_device_info(struct pcmcia_socket *s, bind_info_t *bind_info, int first)
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{
	dev_node_t *node;
	struct pcmcia_device *p_dev;
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	struct pcmcia_driver *p_drv;
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	unsigned long flags;
	int ret = 0;

#ifdef CONFIG_CARDBUS
	/*
	 * Some unbelievably ugly code to associate the PCI cardbus
	 * device and its driver with the PCMCIA "bind" information.
	 */
	{
		struct pci_bus *bus;

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		bus = pcmcia_lookup_bus(s);
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		if (bus) {
			struct list_head *list;
			struct pci_dev *dev = NULL;

			list = bus->devices.next;
			while (list != &bus->devices) {
				struct pci_dev *pdev = pci_dev_b(list);
				list = list->next;

				if (first) {
					dev = pdev;
					break;
				}

				/* Try to handle "next" here some way? */
			}
			if (dev && dev->driver) {
				strlcpy(bind_info->name, dev->driver->name, DEV_NAME_LEN);
				bind_info->major = 0;
				bind_info->minor = 0;
				bind_info->next = NULL;
				return 0;
			}
		}
	}
#endif

	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
		if (p_dev->func == bind_info->function) {
			p_dev = pcmcia_get_dev(p_dev);
			if (!p_dev)
				continue;
			goto found;
		}
	}
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
	return -ENODEV;

 found:
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

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	p_drv = to_pcmcia_drv(p_dev->dev.driver);
	if (p_drv && !p_dev->_locked) {
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		ret = -EAGAIN;
		goto err_put;
	}

	if (first)
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		node = p_dev->dev_node;
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	else
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		for (node = p_dev->dev_node; node; node = node->next)
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			if (node == bind_info->next)
				break;
	if (!node) {
		ret = -ENODEV;
		goto err_put;
	}

	strlcpy(bind_info->name, node->dev_name, DEV_NAME_LEN);
	bind_info->major = node->major;
	bind_info->minor = node->minor;
	bind_info->next = node->next;

 err_put:
	pcmcia_put_dev(p_dev);
	return (ret);
} /* get_device_info */


static int ds_open(struct inode *inode, struct file *file)
{
    socket_t i = iminor(inode);
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    struct pcmcia_socket *s;
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    user_info_t *user;
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    static int warning_printed = 0;
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    ds_dbg(0, "ds_open(socket %d)\n", i);

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    s = pcmcia_get_socket_by_nr(i);
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    if (!s)
	    return -ENODEV;
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    s = pcmcia_get_socket(s);
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    if (!s)
	    return -ENODEV;

    if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
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	    if (s->pcmcia_state.busy) {
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		    pcmcia_put_socket(s);
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		    return -EBUSY;
	    }
	else
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	    s->pcmcia_state.busy = 1;
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    }

    user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
    if (!user) {
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	    pcmcia_put_socket(s);
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	    return -ENOMEM;
    }
    user->event_tail = user->event_head = 0;
    user->next = s->user;
    user->user_magic = USER_MAGIC;
    user->socket = s;
    s->user = user;
    file->private_data = user;

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    if (!warning_printed) {
	    printk(KERN_INFO "pcmcia: Detected deprecated PCMCIA ioctl "
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			"usage from process: %s.\n", current->comm);
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	    printk(KERN_INFO "pcmcia: This interface will soon be removed from "
			"the kernel; please expect breakage unless you upgrade "
			"to new tools.\n");
	    printk(KERN_INFO "pcmcia: see http://www.kernel.org/pub/linux/"
			"utils/kernel/pcmcia/pcmcia.html for details.\n");
	    warning_printed = 1;
    }

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    if (s->pcmcia_state.present)
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	queue_event(user, CS_EVENT_CARD_INSERTION);
    return 0;
} /* ds_open */

/*====================================================================*/

static int ds_release(struct inode *inode, struct file *file)
{
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    struct pcmcia_socket *s;
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    user_info_t *user, **link;

    ds_dbg(0, "ds_release(socket %d)\n", iminor(inode));

    user = file->private_data;
    if (CHECK_USER(user))
	goto out;

    s = user->socket;

    /* Unlink user data structure */
    if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
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	s->pcmcia_state.busy = 0;
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    }
    file->private_data = NULL;
    for (link = &s->user; *link; link = &(*link)->next)
	if (*link == user) break;
    if (link == NULL)
	goto out;
    *link = user->next;
    user->user_magic = 0;
    kfree(user);
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    pcmcia_put_socket(s);
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out:
    return 0;
} /* ds_release */

/*====================================================================*/

static ssize_t ds_read(struct file *file, char __user *buf,
		       size_t count, loff_t *ppos)
{
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    struct pcmcia_socket *s;
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    user_info_t *user;
    int ret;

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    ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_path.dentry->d_inode));
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    if (count < 4)
	return -EINVAL;

    user = file->private_data;
    if (CHECK_USER(user))
	return -EIO;

    s = user->socket;
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    if (s->pcmcia_state.dead)
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        return -EIO;

    ret = wait_event_interruptible(s->queue, !queue_empty(user));
    if (ret == 0)
	ret = put_user(get_queued_event(user), (int __user *)buf) ? -EFAULT : 4;

    return ret;
} /* ds_read */

/*====================================================================*/

static ssize_t ds_write(struct file *file, const char __user *buf,
			size_t count, loff_t *ppos)
{
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    ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_path.dentry->d_inode));
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    if (count != 4)
	return -EINVAL;
    if ((file->f_flags & O_ACCMODE) == O_RDONLY)
	return -EBADF;

    return -EIO;
} /* ds_write */

/*====================================================================*/

/* No kernel lock - fine */
static u_int ds_poll(struct file *file, poll_table *wait)
{
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    struct pcmcia_socket *s;
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    user_info_t *user;

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    ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_path.dentry->d_inode));
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    user = file->private_data;
    if (CHECK_USER(user))
	return POLLERR;
    s = user->socket;
    /*
     * We don't check for a dead socket here since that
     * will send cardmgr into an endless spin.
     */
    poll_wait(file, &s->queue, wait);
    if (!queue_empty(user))
	return POLLIN | POLLRDNORM;
    return 0;
} /* ds_poll */

/*====================================================================*/

static int ds_ioctl(struct inode * inode, struct file * file,
		    u_int cmd, u_long arg)
{
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    struct pcmcia_socket *s;
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    void __user *uarg = (char __user *)arg;
    u_int size;
    int ret, err;
    ds_ioctl_arg_t *buf;
    user_info_t *user;

    ds_dbg(2, "ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg);

    user = file->private_data;
    if (CHECK_USER(user))
	return -EIO;

    s = user->socket;
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    if (s->pcmcia_state.dead)
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        return -EIO;

    size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
    if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL;

    /* Permission check */
    if (!(cmd & IOC_OUT) && !capable(CAP_SYS_ADMIN))
	return -EPERM;

    if (cmd & IOC_IN) {
	if (!access_ok(VERIFY_READ, uarg, size)) {
	    ds_dbg(3, "ds_ioctl(): verify_read = %d\n", -EFAULT);
	    return -EFAULT;
	}
    }
    if (cmd & IOC_OUT) {
	if (!access_ok(VERIFY_WRITE, uarg, size)) {
	    ds_dbg(3, "ds_ioctl(): verify_write = %d\n", -EFAULT);
	    return -EFAULT;
	}
    }
    buf = kmalloc(sizeof(ds_ioctl_arg_t), GFP_KERNEL);
    if (!buf)
	return -ENOMEM;

    err = ret = 0;

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    if (cmd & IOC_IN) {
	if (__copy_from_user((char *)buf, uarg, size)) {
	    err = -EFAULT;
	    goto free_out;
	}
    }
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    switch (cmd) {
    case DS_ADJUST_RESOURCE_INFO:
	ret = pcmcia_adjust_resource_info(&buf->adjust);
	break;
    case DS_GET_CONFIGURATION_INFO:
	if (buf->config.Function &&
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	   (buf->config.Function >= s->functions))
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	    ret = CS_BAD_ARGS;
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	else {
	    struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->config.Function);
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	    ret = pccard_get_configuration_info(s, p_dev, &buf->config);
	    pcmcia_put_dev(p_dev);
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	}
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	break;
    case DS_GET_FIRST_TUPLE:
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	mutex_lock(&s->skt_mutex);
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	pcmcia_validate_mem(s);
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	mutex_unlock(&s->skt_mutex);
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	ret = pccard_get_first_tuple(s, BIND_FN_ALL, &buf->tuple);
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	break;
    case DS_GET_NEXT_TUPLE:
710
	ret = pccard_get_next_tuple(s, BIND_FN_ALL, &buf->tuple);
711 712 713 714
	break;
    case DS_GET_TUPLE_DATA:
	buf->tuple.TupleData = buf->tuple_parse.data;
	buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data);
715
	ret = pccard_get_tuple_data(s, &buf->tuple);
716 717 718 719 720 721
	break;
    case DS_PARSE_TUPLE:
	buf->tuple.TupleData = buf->tuple_parse.data;
	ret = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse);
	break;
    case DS_RESET_CARD:
722
	ret = pccard_reset_card(s);
723 724
	break;
    case DS_GET_STATUS:
725 726 727 728 729
	    if (buf->status.Function &&
		(buf->status.Function >= s->functions))
		    ret = CS_BAD_ARGS;
	    else {
		    struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->status.Function);
730 731
		    ret = pccard_get_status(s, p_dev, &buf->status);
		    pcmcia_put_dev(p_dev);
732 733
	    }
	    break;
734
    case DS_VALIDATE_CIS:
735
	mutex_lock(&s->skt_mutex);
736
	pcmcia_validate_mem(s);
737
	mutex_unlock(&s->skt_mutex);
738
	ret = pccard_validate_cis(s, BIND_FN_ALL, &buf->cisinfo);
739 740
	break;
    case DS_SUSPEND_CARD:
741
	ret = pcmcia_suspend_card(s);
742 743
	break;
    case DS_RESUME_CARD:
744
	ret = pcmcia_resume_card(s);
745 746
	break;
    case DS_EJECT_CARD:
747
	err = pcmcia_eject_card(s);
748 749
	break;
    case DS_INSERT_CARD:
750
	err = pcmcia_insert_card(s);
751 752 753 754 755 756
	break;
    case DS_ACCESS_CONFIGURATION_REGISTER:
	if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) {
	    err = -EPERM;
	    goto free_out;
	}
757 758 759 760 761 762

	ret = CS_BAD_ARGS;

	if (!(buf->conf_reg.Function &&
	     (buf->conf_reg.Function >= s->functions))) {
		struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->conf_reg.Function);
763
		if (p_dev) {
764
			ret = pcmcia_access_configuration_register(p_dev, &buf->conf_reg);
765 766
			pcmcia_put_dev(p_dev);
		}
767
	}
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
	break;
    case DS_GET_FIRST_REGION:
    case DS_GET_NEXT_REGION:
    case DS_BIND_MTD:
	if (!capable(CAP_SYS_ADMIN)) {
		err = -EPERM;
		goto free_out;
	} else {
		static int printed = 0;
		if (!printed) {
			printk(KERN_WARNING "2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n");
			printk(KERN_WARNING "MTD handling any more.\n");
			printed++;
		}
	}
	err = -EINVAL;
	goto free_out;
	break;
    case DS_GET_FIRST_WINDOW:
787
	ret = pcmcia_get_window(s, &buf->win_info.handle, 0,
788 789 790
			&buf->win_info.window);
	break;
    case DS_GET_NEXT_WINDOW:
791
	ret = pcmcia_get_window(s, &buf->win_info.handle,
792 793 794 795 796 797 798
			buf->win_info.handle->index + 1, &buf->win_info.window);
	break;
    case DS_GET_MEM_PAGE:
	ret = pcmcia_get_mem_page(buf->win_info.handle,
			   &buf->win_info.map);
	break;
    case DS_REPLACE_CIS:
799
	ret = pcmcia_replace_cis(s, &buf->cisdump);
800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853
	break;
    case DS_BIND_REQUEST:
	if (!capable(CAP_SYS_ADMIN)) {
		err = -EPERM;
		goto free_out;
	}
	err = bind_request(s, &buf->bind_info);
	break;
    case DS_GET_DEVICE_INFO:
	err = get_device_info(s, &buf->bind_info, 1);
	break;
    case DS_GET_NEXT_DEVICE:
	err = get_device_info(s, &buf->bind_info, 0);
	break;
    case DS_UNBIND_REQUEST:
	err = 0;
	break;
    default:
	err = -EINVAL;
    }

    if ((err == 0) && (ret != CS_SUCCESS)) {
	ds_dbg(2, "ds_ioctl: ret = %d\n", ret);
	switch (ret) {
	case CS_BAD_SOCKET: case CS_NO_CARD:
	    err = -ENODEV; break;
	case CS_BAD_ARGS: case CS_BAD_ATTRIBUTE: case CS_BAD_IRQ:
	case CS_BAD_TUPLE:
	    err = -EINVAL; break;
	case CS_IN_USE:
	    err = -EBUSY; break;
	case CS_OUT_OF_RESOURCE:
	    err = -ENOSPC; break;
	case CS_NO_MORE_ITEMS:
	    err = -ENODATA; break;
	case CS_UNSUPPORTED_FUNCTION:
	    err = -ENOSYS; break;
	default:
	    err = -EIO; break;
	}
    }

    if (cmd & IOC_OUT) {
        if (__copy_to_user(uarg, (char *)buf, size))
            err = -EFAULT;
    }

free_out:
    kfree(buf);
    return err;
} /* ds_ioctl */

/*====================================================================*/

854
static const struct file_operations ds_fops = {
855 856 857 858 859 860 861 862 863 864 865 866 867 868
	.owner		= THIS_MODULE,
	.open		= ds_open,
	.release	= ds_release,
	.ioctl		= ds_ioctl,
	.read		= ds_read,
	.write		= ds_write,
	.poll		= ds_poll,
};

void __init pcmcia_setup_ioctl(void) {
	int i;

	/* Set up character device for user mode clients */
	i = register_chrdev(0, "pcmcia", &ds_fops);
869
	if (i < 0)
870
		printk(KERN_NOTICE "unable to find a free device # for "
871
		       "Driver Services (error=%d)\n", i);
872 873 874 875
	else
		major_dev = i;

#ifdef CONFIG_PROC_FS
876
	proc_pccard = proc_mkdir("bus/pccard", NULL);
877 878 879 880 881 882 883 884 885 886
	if (proc_pccard)
		create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL);
#endif
}


void __exit pcmcia_cleanup_ioctl(void) {
#ifdef CONFIG_PROC_FS
	if (proc_pccard) {
		remove_proc_entry("drivers", proc_pccard);
887
		remove_proc_entry("bus/pccard", NULL);
888 889 890 891 892
	}
#endif
	if (major_dev != -1)
		unregister_chrdev(major_dev, "pcmcia");
}