linux/drivers/pcmcia/pcmcia_ioctl.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

1076 lines
26 KiB
C

/*
* 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.
*/
#include <linux/kernel.h>
#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/slab.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <linux/workqueue.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#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;
struct pcmcia_socket *socket;
} user_info_t;
static struct pcmcia_device *get_pcmcia_device(struct pcmcia_socket *s,
unsigned int function)
{
struct pcmcia_device *p_dev = NULL;
mutex_lock(&s->ops_mutex);
list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
if (p_dev->func == function) {
mutex_unlock(&s->ops_mutex);
return pcmcia_get_dev(p_dev);
}
}
mutex_unlock(&s->ops_mutex);
return NULL;
}
/* backwards-compatible accessing of driver --- by name! */
static struct pcmcia_driver *get_pcmcia_driver(dev_info_t *dev_info)
{
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;
static int proc_read_drivers_callback(struct device_driver *driver, void *_m)
{
struct seq_file *m = _m;
struct pcmcia_driver *p_drv = container_of(driver,
struct pcmcia_driver, drv);
seq_printf(m, "%-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
);
return 0;
}
static int pccard_drivers_proc_show(struct seq_file *m, void *v)
{
return bus_for_each_drv(&pcmcia_bus_type, NULL,
m, proc_read_drivers_callback);
}
static int pccard_drivers_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, pccard_drivers_proc_show, NULL);
}
static const struct file_operations pccard_drivers_proc_fops = {
.owner = THIS_MODULE,
.open = pccard_drivers_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
#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 -EINVAL;
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 0;
}
#endif
static int pcmcia_adjust_resource_info(adjust_t *adj)
{
struct pcmcia_socket *s;
int ret = -ENOSYS;
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 */
mutex_lock(&s->ops_mutex);
if ((s->resource_setup_new) &&
!(s->resource_setup_old)) {
mutex_unlock(&s->ops_mutex);
continue;
} else if (!(s->resource_setup_old))
s->resource_setup_old = 1;
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... */
s->resource_setup_done = 1;
}
mutex_unlock(&s->ops_mutex);
}
}
up_read(&pcmcia_socket_list_rwsem);
return ret;
}
/** pcmcia_get_window
*/
static int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *wh_out,
window_handle_t wh, win_req_t *req)
{
pccard_mem_map *win;
window_handle_t w;
wh--;
if (!s || !(s->state & SOCKET_PRESENT))
return -ENODEV;
if (wh >= MAX_WIN)
return -EINVAL;
for (w = wh; w < MAX_WIN; w++)
if (s->state & SOCKET_WIN_REQ(w))
break;
if (w == MAX_WIN)
return -EINVAL;
win = &s->win[w];
req->Base = win->res->start;
req->Size = win->res->end - win->res->start + 1;
req->AccessSpeed = win->speed;
req->Attributes = 0;
if (win->flags & MAP_ATTRIB)
req->Attributes |= WIN_MEMORY_TYPE_AM;
if (win->flags & MAP_ACTIVE)
req->Attributes |= WIN_ENABLE;
if (win->flags & MAP_16BIT)
req->Attributes |= WIN_DATA_WIDTH_16;
if (win->flags & MAP_USE_WAIT)
req->Attributes |= WIN_USE_WAIT;
*wh_out = w + 1;
return 0;
} /* pcmcia_get_window */
/** pcmcia_get_mem_page
*
* Change the card address of an already open memory window.
*/
static int pcmcia_get_mem_page(struct pcmcia_socket *skt, window_handle_t wh,
memreq_t *req)
{
wh--;
if (wh >= MAX_WIN)
return -EINVAL;
req->Page = 0;
req->CardOffset = skt->win[wh].card_start;
return 0;
} /* pcmcia_get_mem_page */
/** 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))
return -ENODEV;
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;
}
return 0;
}
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;
return 0;
} /* pccard_get_status */
static int pccard_get_configuration_info(struct pcmcia_socket *s,
struct pcmcia_device *p_dev,
config_info_t *config)
{
config_t *c;
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
#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;
}
}
return 0;
}
#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;
return 0;
}
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;
return 0;
} /* pccard_get_configuration_info */
/*======================================================================
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;
}
void handle_event(struct pcmcia_socket *s, event_t event)
{
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.
======================================================================*/
static int bind_request(struct pcmcia_socket *s, bind_info_t *bind_info)
{
struct pcmcia_driver *p_drv;
struct pcmcia_device *p_dev;
int ret = 0;
s = pcmcia_get_socket(s);
if (!s)
return -EINVAL;
pr_debug("bind_request(%d, '%s')\n", s->sock,
(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;
}
mutex_lock(&s->ops_mutex);
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". */
mutex_unlock(&s->ops_mutex);
bind_info->instance = p_dev;
ret = -EBUSY;
goto err_put_module;
} else {
/* the correct driver managed to bind
* itself magically to the correct
* device. */
mutex_unlock(&s->ops_mutex);
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! */
mutex_unlock(&s->ops_mutex);
goto rescan;
}
}
}
mutex_unlock(&s->ops_mutex);
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.
*/
mutex_lock(&s->skt_mutex);
ret = bus_rescan_devices(&pcmcia_bus_type);
mutex_unlock(&s->skt_mutex);
if (ret)
goto err_put_module;
/* 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:
pcmcia_put_socket(s);
return ret;
} /* bind_request */
#ifdef CONFIG_CARDBUS
static struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s)
{
if (!s || !(s->state & SOCKET_CARDBUS))
return NULL;
return s->cb_dev->subordinate;
}
#endif
static int get_device_info(struct pcmcia_socket *s, bind_info_t *bind_info, int first)
{
dev_node_t *node;
struct pcmcia_device *p_dev;
struct pcmcia_driver *p_drv;
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;
bus = pcmcia_lookup_bus(s);
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
mutex_lock(&s->ops_mutex);
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;
}
}
mutex_unlock(&s->ops_mutex);
return -ENODEV;
found:
mutex_unlock(&s->ops_mutex);
p_drv = to_pcmcia_drv(p_dev->dev.driver);
if (p_drv && !p_dev->_locked) {
ret = -EAGAIN;
goto err_put;
}
if (first)
node = p_dev->dev_node;
else
for (node = p_dev->dev_node; node; node = node->next)
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);
struct pcmcia_socket *s;
user_info_t *user;
static int warning_printed;
int ret = 0;
pr_debug("ds_open(socket %d)\n", i);
lock_kernel();
s = pcmcia_get_socket_by_nr(i);
if (!s) {
ret = -ENODEV;
goto out;
}
s = pcmcia_get_socket(s);
if (!s) {
ret = -ENODEV;
goto out;
}
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
if (s->pcmcia_state.busy) {
pcmcia_put_socket(s);
ret = -EBUSY;
goto out;
}
else
s->pcmcia_state.busy = 1;
}
user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
if (!user) {
pcmcia_put_socket(s);
ret = -ENOMEM;
goto out;
}
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;
if (!warning_printed) {
printk(KERN_INFO "pcmcia: Detected deprecated PCMCIA ioctl "
"usage from process: %s.\n", current->comm);
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;
}
if (s->pcmcia_state.present)
queue_event(user, CS_EVENT_CARD_INSERTION);
out:
unlock_kernel();
return ret;
} /* ds_open */
/*====================================================================*/
static int ds_release(struct inode *inode, struct file *file)
{
struct pcmcia_socket *s;
user_info_t *user, **link;
pr_debug("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)
s->pcmcia_state.busy = 0;
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);
pcmcia_put_socket(s);
out:
return 0;
} /* ds_release */
/*====================================================================*/
static ssize_t ds_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct pcmcia_socket *s;
user_info_t *user;
int ret;
pr_debug("ds_read(socket %d)\n", iminor(file->f_path.dentry->d_inode));
if (count < 4)
return -EINVAL;
user = file->private_data;
if (CHECK_USER(user))
return -EIO;
s = user->socket;
if (s->pcmcia_state.dead)
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)
{
pr_debug("ds_write(socket %d)\n", iminor(file->f_path.dentry->d_inode));
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)
{
struct pcmcia_socket *s;
user_info_t *user;
pr_debug("ds_poll(socket %d)\n", iminor(file->f_path.dentry->d_inode));
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)
{
struct pcmcia_socket *s;
void __user *uarg = (char __user *)arg;
u_int size;
int ret, err;
ds_ioctl_arg_t *buf;
user_info_t *user;
pr_debug("ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg);
user = file->private_data;
if (CHECK_USER(user))
return -EIO;
s = user->socket;
if (s->pcmcia_state.dead)
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)) {
pr_debug("ds_ioctl(): verify_read = %d\n", -EFAULT);
return -EFAULT;
}
}
if (cmd & IOC_OUT) {
if (!access_ok(VERIFY_WRITE, uarg, size)) {
pr_debug("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;
if (cmd & IOC_IN) {
if (__copy_from_user((char *)buf, uarg, size)) {
err = -EFAULT;
goto free_out;
}
}
switch (cmd) {
case DS_ADJUST_RESOURCE_INFO:
ret = pcmcia_adjust_resource_info(&buf->adjust);
break;
case DS_GET_CONFIGURATION_INFO:
if (buf->config.Function &&
(buf->config.Function >= s->functions))
ret = -EINVAL;
else {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->config.Function);
ret = pccard_get_configuration_info(s, p_dev, &buf->config);
pcmcia_put_dev(p_dev);
}
break;
case DS_GET_FIRST_TUPLE:
mutex_lock(&s->skt_mutex);
pcmcia_validate_mem(s);
mutex_unlock(&s->skt_mutex);
ret = pccard_get_first_tuple(s, BIND_FN_ALL, &buf->tuple);
break;
case DS_GET_NEXT_TUPLE:
ret = pccard_get_next_tuple(s, BIND_FN_ALL, &buf->tuple);
break;
case DS_GET_TUPLE_DATA:
buf->tuple.TupleData = buf->tuple_parse.data;
buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data);
ret = pccard_get_tuple_data(s, &buf->tuple);
break;
case DS_PARSE_TUPLE:
buf->tuple.TupleData = buf->tuple_parse.data;
ret = pcmcia_parse_tuple(&buf->tuple, &buf->tuple_parse.parse);
break;
case DS_RESET_CARD:
ret = pcmcia_reset_card(s);
break;
case DS_GET_STATUS:
if (buf->status.Function &&
(buf->status.Function >= s->functions))
ret = -EINVAL;
else {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->status.Function);
ret = pccard_get_status(s, p_dev, &buf->status);
pcmcia_put_dev(p_dev);
}
break;
case DS_VALIDATE_CIS:
mutex_lock(&s->skt_mutex);
pcmcia_validate_mem(s);
mutex_unlock(&s->skt_mutex);
ret = pccard_validate_cis(s, &buf->cisinfo.Chains);
break;
case DS_SUSPEND_CARD:
pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
break;
case DS_RESUME_CARD:
pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
break;
case DS_EJECT_CARD:
pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
break;
case DS_INSERT_CARD:
pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
break;
case DS_ACCESS_CONFIGURATION_REGISTER:
if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) {
err = -EPERM;
goto free_out;
}
ret = -EINVAL;
if (!(buf->conf_reg.Function &&
(buf->conf_reg.Function >= s->functions))) {
struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->conf_reg.Function);
if (p_dev) {
ret = pcmcia_access_configuration_register(p_dev, &buf->conf_reg);
pcmcia_put_dev(p_dev);
}
}
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 {
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");
}
err = -EINVAL;
goto free_out;
break;
case DS_GET_FIRST_WINDOW:
ret = pcmcia_get_window(s, &buf->win_info.handle, 1,
&buf->win_info.window);
break;
case DS_GET_NEXT_WINDOW:
ret = pcmcia_get_window(s, &buf->win_info.handle,
buf->win_info.handle + 1, &buf->win_info.window);
break;
case DS_GET_MEM_PAGE:
ret = pcmcia_get_mem_page(s, buf->win_info.handle,
&buf->win_info.map);
break;
case DS_REPLACE_CIS:
ret = pcmcia_replace_cis(s, buf->cisdump.Data, buf->cisdump.Length);
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 != 0)) {
pr_debug("ds_ioctl: ret = %d\n", ret);
switch (ret) {
case -ENODEV:
case -EINVAL:
case -EBUSY:
case -ENOSYS:
err = ret;
break;
case -ENOMEM:
err = -ENOSPC; break;
case -ENOSPC:
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 */
/*====================================================================*/
static const struct file_operations ds_fops = {
.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);
if (i < 0)
printk(KERN_NOTICE "unable to find a free device # for "
"Driver Services (error=%d)\n", i);
else
major_dev = i;
#ifdef CONFIG_PROC_FS
proc_pccard = proc_mkdir("bus/pccard", NULL);
if (proc_pccard)
proc_create("drivers", 0, proc_pccard, &pccard_drivers_proc_fops);
#endif
}
void __exit pcmcia_cleanup_ioctl(void)
{
#ifdef CONFIG_PROC_FS
if (proc_pccard) {
remove_proc_entry("drivers", proc_pccard);
remove_proc_entry("bus/pccard", NULL);
}
#endif
if (major_dev != -1)
unregister_chrdev(major_dev, "pcmcia");
}