pcmcia_ioctl.c 25.4 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>
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#include <linux/smp_lock.h>
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#include <linux/workqueue.h>

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

#include "cs_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;


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#ifdef CONFIG_PCMCIA_DEBUG
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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))
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		return -EINVAL;
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	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) {
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	return 0;
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}

#endif

static int pcmcia_adjust_resource_info(adjust_t *adj)
{
	struct pcmcia_socket *s;
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	int ret = -ENOSYS;
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	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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/** pccard_get_status
 *
 * Get the current socket state bits.  We don't support the latched
 * SocketState yet: I haven't seen any point for it.
 */

static int pccard_get_status(struct pcmcia_socket *s,
			     struct pcmcia_device *p_dev,
			     cs_status_t *status)
{
	config_t *c;
	int val;

	s->ops->get_status(s, &val);
	status->CardState = status->SocketState = 0;
	status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
	status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
	status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
	status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
	if (s->state & SOCKET_SUSPEND)
		status->CardState |= CS_EVENT_PM_SUSPEND;
	if (!(s->state & SOCKET_PRESENT))
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		return -ENODEV;
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	c = (p_dev) ? p_dev->function_config : NULL;

	if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
	    (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
		u_char reg;
		if (c->CardValues & PRESENT_PIN_REPLACE) {
			pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
			status->CardState |=
				(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
			status->CardState |=
				(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
			status->CardState |=
				(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
			status->CardState |=
				(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
		} else {
			/* No PRR?  Then assume we're always ready */
			status->CardState |= CS_EVENT_READY_CHANGE;
		}
		if (c->CardValues & PRESENT_EXT_STATUS) {
			pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
			status->CardState |=
				(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
		}
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		return 0;
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	}
	status->CardState |=
		(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
	status->CardState |=
		(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
	status->CardState |=
		(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
	status->CardState |=
		(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
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	return 0;
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} /* pccard_get_status */
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static int pccard_get_configuration_info(struct pcmcia_socket *s,
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				  struct pcmcia_device *p_dev,
				  config_info_t *config)
{
	config_t *c;

	if (!(s->state & SOCKET_PRESENT))
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		return -ENODEV;
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#ifdef CONFIG_CARDBUS
	if (s->state & SOCKET_CARDBUS) {
		memset(config, 0, sizeof(config_info_t));
		config->Vcc = s->socket.Vcc;
		config->Vpp1 = config->Vpp2 = s->socket.Vpp;
		config->Option = s->cb_dev->subordinate->number;
		if (s->state & SOCKET_CARDBUS_CONFIG) {
			config->Attributes = CONF_VALID_CLIENT;
			config->IntType = INT_CARDBUS;
			config->AssignedIRQ = s->irq.AssignedIRQ;
			if (config->AssignedIRQ)
				config->Attributes |= CONF_ENABLE_IRQ;
			if (s->io[0].res) {
				config->BasePort1 = s->io[0].res->start;
				config->NumPorts1 = s->io[0].res->end -
					config->BasePort1 + 1;
			}
		}
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		return 0;
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	}
#endif

	if (p_dev) {
		c = p_dev->function_config;
		config->Function = p_dev->func;
	} else {
		c = NULL;
		config->Function = 0;
	}

	if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
		config->Attributes = 0;
		config->Vcc = s->socket.Vcc;
		config->Vpp1 = config->Vpp2 = s->socket.Vpp;
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		return 0;
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	}

	config->Attributes = c->Attributes | CONF_VALID_CLIENT;
	config->Vcc = s->socket.Vcc;
	config->Vpp1 = config->Vpp2 = s->socket.Vpp;
	config->IntType = c->IntType;
	config->ConfigBase = c->ConfigBase;
	config->Status = c->Status;
	config->Pin = c->Pin;
	config->Copy = c->Copy;
	config->Option = c->Option;
	config->ExtStatus = c->ExtStatus;
	config->Present = config->CardValues = c->CardValues;
	config->IRQAttributes = c->irq.Attributes;
	config->AssignedIRQ = s->irq.AssignedIRQ;
	config->BasePort1 = c->io.BasePort1;
	config->NumPorts1 = c->io.NumPorts1;
	config->Attributes1 = c->io.Attributes1;
	config->BasePort2 = c->io.BasePort2;
	config->NumPorts2 = c->io.NumPorts2;
	config->Attributes2 = c->io.Attributes2;
	config->IOAddrLines = c->io.IOAddrLines;

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	return 0;
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} /* pccard_get_configuration_info */


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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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    int ret = 0;
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    ds_dbg(0, "ds_open(socket %d)\n", i);

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    lock_kernel();
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    s = pcmcia_get_socket_by_nr(i);
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    if (!s) {
	    ret = -ENODEV;
	    goto out;
    }
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    s = pcmcia_get_socket(s);
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    if (!s) {
	    ret = -ENODEV;
	    goto out;
    }
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    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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		    ret = -EBUSY;
		    goto out;
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	    }
	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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	    ret = -ENOMEM;
	    goto out;
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    }
    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;
    }

670
    if (s->pcmcia_state.present)
671
	queue_event(user, CS_EVENT_CARD_INSERTION);
672 673 674
out:
    unlock_kernel();
    return ret;
675 676 677 678 679 680
} /* ds_open */

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

static int ds_release(struct inode *inode, struct file *file)
{
681
    struct pcmcia_socket *s;
682 683 684 685 686 687 688 689 690 691 692 693
    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) {
694
	s->pcmcia_state.busy = 0;
695 696 697 698 699 700 701 702 703
    }
    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);
704
    pcmcia_put_socket(s);
705 706 707 708 709 710 711 712 713
out:
    return 0;
} /* ds_release */

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

static ssize_t ds_read(struct file *file, char __user *buf,
		       size_t count, loff_t *ppos)
{
714
    struct pcmcia_socket *s;
715 716 717
    user_info_t *user;
    int ret;

J
Josef Sipek 已提交
718
    ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_path.dentry->d_inode));
719 720 721 722 723 724 725 726 727

    if (count < 4)
	return -EINVAL;

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

    s = user->socket;
728
    if (s->pcmcia_state.dead)
729 730 731 732 733 734 735 736 737 738 739 740 741 742
        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)
{
J
Josef Sipek 已提交
743
    ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_path.dentry->d_inode));
744 745 746 747 748 749 750 751 752 753 754 755 756 757

    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)
{
758
    struct pcmcia_socket *s;
759 760
    user_info_t *user;

J
Josef Sipek 已提交
761
    ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_path.dentry->d_inode));
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781

    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)
{
782
    struct pcmcia_socket *s;
783 784 785 786 787 788 789 790 791 792 793 794 795
    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;
796
    if (s->pcmcia_state.dead)
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823
        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;

824 825 826 827 828 829
    if (cmd & IOC_IN) {
	if (__copy_from_user((char *)buf, uarg, size)) {
	    err = -EFAULT;
	    goto free_out;
	}
    }
830 831 832 833 834 835 836

    switch (cmd) {
    case DS_ADJUST_RESOURCE_INFO:
	ret = pcmcia_adjust_resource_info(&buf->adjust);
	break;
    case DS_GET_CONFIGURATION_INFO:
	if (buf->config.Function &&
837
	   (buf->config.Function >= s->functions))
838
	    ret = -EINVAL;
839 840
	else {
	    struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->config.Function);
841 842
	    ret = pccard_get_configuration_info(s, p_dev, &buf->config);
	    pcmcia_put_dev(p_dev);
843
	}
844 845
	break;
    case DS_GET_FIRST_TUPLE:
846
	mutex_lock(&s->skt_mutex);
847
	pcmcia_validate_mem(s);
848
	mutex_unlock(&s->skt_mutex);
849
	ret = pccard_get_first_tuple(s, BIND_FN_ALL, &buf->tuple);
850 851
	break;
    case DS_GET_NEXT_TUPLE:
852
	ret = pccard_get_next_tuple(s, BIND_FN_ALL, &buf->tuple);
853 854 855 856
	break;
    case DS_GET_TUPLE_DATA:
	buf->tuple.TupleData = buf->tuple_parse.data;
	buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data);
857
	ret = pccard_get_tuple_data(s, &buf->tuple);
858 859 860
	break;
    case DS_PARSE_TUPLE:
	buf->tuple.TupleData = buf->tuple_parse.data;
861
	ret = pcmcia_parse_tuple(&buf->tuple, &buf->tuple_parse.parse);
862 863
	break;
    case DS_RESET_CARD:
864
	ret = pcmcia_reset_card(s);
865 866
	break;
    case DS_GET_STATUS:
867 868
	    if (buf->status.Function &&
		(buf->status.Function >= s->functions))
869
		    ret = -EINVAL;
870 871
	    else {
		    struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->status.Function);
872 873
		    ret = pccard_get_status(s, p_dev, &buf->status);
		    pcmcia_put_dev(p_dev);
874 875
	    }
	    break;
876
    case DS_VALIDATE_CIS:
877
	mutex_lock(&s->skt_mutex);
878
	pcmcia_validate_mem(s);
879
	mutex_unlock(&s->skt_mutex);
880
	ret = pccard_validate_cis(s, BIND_FN_ALL, &buf->cisinfo.Chains);
881 882
	break;
    case DS_SUSPEND_CARD:
883
	ret = pcmcia_suspend_card(s);
884 885
	break;
    case DS_RESUME_CARD:
886
	ret = pcmcia_resume_card(s);
887 888
	break;
    case DS_EJECT_CARD:
889
	err = pcmcia_eject_card(s);
890 891
	break;
    case DS_INSERT_CARD:
892
	err = pcmcia_insert_card(s);
893 894 895 896 897 898
	break;
    case DS_ACCESS_CONFIGURATION_REGISTER:
	if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) {
	    err = -EPERM;
	    goto free_out;
	}
899

900
	ret = -EINVAL;
901 902 903 904

	if (!(buf->conf_reg.Function &&
	     (buf->conf_reg.Function >= s->functions))) {
		struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->conf_reg.Function);
905
		if (p_dev) {
906
			ret = pcmcia_access_configuration_register(p_dev, &buf->conf_reg);
907 908
			pcmcia_put_dev(p_dev);
		}
909
	}
910 911 912 913 914 915 916 917
	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 {
918 919 920
			printk_once(KERN_WARNING
				"2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n");
			printk_once(KERN_WARNING "MTD handling any more.\n");
921 922 923 924 925
	}
	err = -EINVAL;
	goto free_out;
	break;
    case DS_GET_FIRST_WINDOW:
926
	ret = pcmcia_get_window(s, &buf->win_info.handle, 0,
927 928 929
			&buf->win_info.window);
	break;
    case DS_GET_NEXT_WINDOW:
930
	ret = pcmcia_get_window(s, &buf->win_info.handle,
931 932 933 934 935 936 937
			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:
938
	ret = pcmcia_replace_cis(s, buf->cisdump.Data, buf->cisdump.Length);
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959
	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;
    }

D
Dominik Brodowski 已提交
960
    if ((err == 0) && (ret != 0)) {
961 962
	ds_dbg(2, "ds_ioctl: ret = %d\n", ret);
	switch (ret) {
963 964 965 966 967 968 969
	case -ENODEV:
	case -EINVAL:
	case -EBUSY:
	case -ENOSYS:
	    err = ret;
	    break;
	case -ENOMEM:
970
	    err = -ENOSPC; break;
971
	case -ENOSPC:
972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989
	    err = -ENODATA; 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 */

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

990
static const struct file_operations ds_fops = {
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
	.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);
1005
	if (i < 0)
1006
		printk(KERN_NOTICE "unable to find a free device # for "
1007
		       "Driver Services (error=%d)\n", i);
1008 1009 1010 1011
	else
		major_dev = i;

#ifdef CONFIG_PROC_FS
1012
	proc_pccard = proc_mkdir("bus/pccard", NULL);
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
	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);
1023
		remove_proc_entry("bus/pccard", NULL);
1024 1025 1026 1027 1028
	}
#endif
	if (major_dev != -1)
		unregister_chrdev(major_dev, "pcmcia");
}