diff options
Diffstat (limited to 'drivers/pcmcia/pcmcia_ioctl.c')
| -rw-r--r-- | drivers/pcmcia/pcmcia_ioctl.c | 759 |
1 files changed, 759 insertions, 0 deletions
diff --git a/drivers/pcmcia/pcmcia_ioctl.c b/drivers/pcmcia/pcmcia_ioctl.c new file mode 100644 index 0000000..39ba640 --- /dev/null +++ b/drivers/pcmcia/pcmcia_ioctl.c @@ -0,0 +1,759 @@ +/* + * 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/config.h> +#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/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; + struct pcmcia_socket *socket; +} user_info_t; + + +#ifdef DEBUG +extern int ds_pc_debug; +#define cs_socket_name(skt) ((skt)->dev.class_id) + +#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 + + +/* 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 = 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; + + bus_for_each_drv(&pcmcia_bus_type, NULL, + (void *) &p, proc_read_drivers_callback); + + return (p - buf); +} +#endif + +/*====================================================================== + + 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; + unsigned long flags; + + s = pcmcia_get_socket(s); + if (!s) + return -EINVAL; + + ds_dbg(2, "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; + } + + 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); + bind_info->instance = p_dev->instance; + 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. + */ + down(&s->skt_sem); + bus_rescan_devices(&pcmcia_bus_type); + up(&s->skt_sem); + + /* 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; + 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; + + 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 + + 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); + + if ((!p_dev->instance) || + (p_dev->instance->state & DEV_CONFIG_PENDING)) { + ret = -EAGAIN; + goto err_put; + } + + if (first) + node = p_dev->instance->dev; + else + for (node = p_dev->instance->dev; 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; + + ds_dbg(0, "ds_open(socket %d)\n", i); + + s = pcmcia_get_socket_by_nr(i); + if (!s) + return -ENODEV; + s = pcmcia_get_socket(s); + if (!s) + return -ENODEV; + + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { + if (s->pcmcia_state.busy) { + pcmcia_put_socket(s); + return -EBUSY; + } + else + s->pcmcia_state.busy = 1; + } + + user = kmalloc(sizeof(user_info_t), GFP_KERNEL); + if (!user) { + pcmcia_put_socket(s); + 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; + + if (s->pcmcia_state.present) + queue_event(user, CS_EVENT_CARD_INSERTION); + return 0; +} /* ds_open */ + +/*====================================================================*/ + +static int ds_release(struct inode *inode, struct file *file) +{ + struct pcmcia_socket *s; + 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) { + 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; + + ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_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) +{ + ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_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; + + ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_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 */ + +/*====================================================================*/ + +extern int pcmcia_adjust_resource_info(adjust_t *adj); + +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; + + 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; + 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)) { + 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; + + if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size); + + 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 = CS_BAD_ARGS; + else + ret = pccard_get_configuration_info(s, + buf->config.Function, &buf->config); + break; + case DS_GET_FIRST_TUPLE: + down(&s->skt_sem); + pcmcia_validate_mem(s); + up(&s->skt_sem); + 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 = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse); + break; + case DS_RESET_CARD: + ret = pccard_reset_card(s); + break; + case DS_GET_STATUS: + if (buf->status.Function && + (buf->status.Function >= s->functions)) + ret = CS_BAD_ARGS; + else + ret = pccard_get_status(s, buf->status.Function, &buf->status); + break; + case DS_VALIDATE_CIS: + down(&s->skt_sem); + pcmcia_validate_mem(s); + up(&s->skt_sem); + ret = pccard_validate_cis(s, BIND_FN_ALL, &buf->cisinfo); + break; + case DS_SUSPEND_CARD: + ret = pcmcia_suspend_card(s); + break; + case DS_RESUME_CARD: + ret = pcmcia_resume_card(s); + break; + case DS_EJECT_CARD: + err = pcmcia_eject_card(s); + break; + case DS_INSERT_CARD: + err = pcmcia_insert_card(s); + break; + case DS_ACCESS_CONFIGURATION_REGISTER: + if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) { + err = -EPERM; + goto free_out; + } + if (buf->conf_reg.Function && + (buf->conf_reg.Function >= s->functions)) + ret = CS_BAD_ARGS; + else + ret = pccard_access_configuration_register(s, + buf->conf_reg.Function, &buf->conf_reg); + 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: + ret = pcmcia_get_window(s, &buf->win_info.handle, 0, + &buf->win_info.window); + break; + case DS_GET_NEXT_WINDOW: + ret = pcmcia_get_window(s, &buf->win_info.handle, + 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: + ret = pcmcia_replace_cis(s, &buf->cisdump); + 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 */ + +/*====================================================================*/ + +static 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("pccard", proc_bus); + 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); + remove_proc_entry("pccard", proc_bus); + } +#endif + if (major_dev != -1) + unregister_chrdev(major_dev, "pcmcia"); +} |