linux/drivers/ide/ide-proc.c
Bartlomiej Zolnierkiewicz 3b2a5c7149 ide: filter out "default" transfer mode values in set_xfer_rate()
* Filter out "default" transfer mode values (0x00 - default PIO mode,
  0x01 - default PIO mode w/ IORDY disabled) in write handler for obsoleted
  /proc/ide/hd?/settings:current_speed setting.

  Allowing "default" transfer mode values is a dangerous thing to do as
  we don't support programming controller to the "default" transfer mode
  and devices often use different values for the default and maximum PIO
  mode (i.e. PIO2 default and PIO4 maximum) so the controller will stay
  programmed for higher PIO mode while device will use the lower PIO mode.

  There is no functionality loss as by using special IOCTLs device can
  still be programmed to "default" transfer modes (it is only useful for
  debugging/testing purposes anyway).

* Remove no longer needed IDE_HFLAG_ABUSE_SET_DMA_MODE host flag, it was
  previously used by few host drivers to program the controller to PIO0
  timings for "default" transfer mode == 0x01 (although some host drivers
  would program invalid PIO timings instead).

* Cleanup ide_set_xfer_rate() and add BUG_ON().

Suggested-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-23 19:55:56 +02:00

846 lines
22 KiB
C

/*
* Copyright (C) 1997-1998 Mark Lord
* Copyright (C) 2003 Red Hat <alan@redhat.com>
*
* Some code was moved here from ide.c, see it for original copyrights.
*/
/*
* This is the /proc/ide/ filesystem implementation.
*
* Drive/Driver settings can be retrieved by reading the drive's
* "settings" files. e.g. "cat /proc/ide0/hda/settings"
* To write a new value "val" into a specific setting "name", use:
* echo "name:val" >/proc/ide/ide0/hda/settings
*
* Also useful, "cat /proc/ide0/hda/[identify, smart_values,
* smart_thresholds, capabilities]" will issue an IDENTIFY /
* PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
* SENSE CAPABILITIES command to /dev/hda, and then dump out the
* returned data as 256 16-bit words. The "hdparm" utility will
* be updated someday soon to use this mechanism.
*
*/
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/ctype.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <asm/io.h>
static struct proc_dir_entry *proc_ide_root;
static int proc_ide_read_imodel
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_hwif_t *hwif = (ide_hwif_t *) data;
int len;
const char *name;
switch (hwif->chipset) {
case ide_generic: name = "generic"; break;
case ide_pci: name = "pci"; break;
case ide_cmd640: name = "cmd640"; break;
case ide_dtc2278: name = "dtc2278"; break;
case ide_ali14xx: name = "ali14xx"; break;
case ide_qd65xx: name = "qd65xx"; break;
case ide_umc8672: name = "umc8672"; break;
case ide_ht6560b: name = "ht6560b"; break;
case ide_rz1000: name = "rz1000"; break;
case ide_trm290: name = "trm290"; break;
case ide_cmd646: name = "cmd646"; break;
case ide_cy82c693: name = "cy82c693"; break;
case ide_4drives: name = "4drives"; break;
case ide_pmac: name = "mac-io"; break;
case ide_au1xxx: name = "au1xxx"; break;
case ide_palm3710: name = "palm3710"; break;
case ide_acorn: name = "acorn"; break;
default: name = "(unknown)"; break;
}
len = sprintf(page, "%s\n", name);
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static int proc_ide_read_mate
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_hwif_t *hwif = (ide_hwif_t *) data;
int len;
if (hwif && hwif->mate)
len = sprintf(page, "%s\n", hwif->mate->name);
else
len = sprintf(page, "(none)\n");
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static int proc_ide_read_channel
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_hwif_t *hwif = (ide_hwif_t *) data;
int len;
page[0] = hwif->channel ? '1' : '0';
page[1] = '\n';
len = 2;
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static int proc_ide_read_identify
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *)data;
int len = 0, i = 0;
int err = 0;
len = sprintf(page, "\n");
if (drive) {
unsigned short *val = (unsigned short *) page;
err = taskfile_lib_get_identify(drive, page);
if (!err) {
char *out = ((char *)page) + (SECTOR_WORDS * 4);
page = out;
do {
out += sprintf(out, "%04x%c",
le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
val += 1;
} while (i < (SECTOR_WORDS * 2));
len = out - page;
}
}
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
/**
* __ide_add_setting - add an ide setting option
* @drive: drive to use
* @name: setting name
* @rw: true if the function is read write
* @data_type: type of data
* @min: range minimum
* @max: range maximum
* @mul_factor: multiplication scale
* @div_factor: divison scale
* @data: private data field
* @set: setting
* @auto_remove: setting auto removal flag
*
* Removes the setting named from the device if it is present.
* The function takes the settings_lock to protect against
* parallel changes. This function must not be called from IRQ
* context. Returns 0 on success or -1 on failure.
*
* BUGS: This code is seriously over-engineered. There is also
* magic about how the driver specific features are setup. If
* a driver is attached we assume the driver settings are auto
* remove.
*/
static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
{
ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
mutex_lock(&ide_setting_mtx);
while ((*p) && strcmp((*p)->name, name) < 0)
p = &((*p)->next);
if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
goto abort;
if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
goto abort;
strcpy(setting->name, name);
setting->rw = rw;
setting->data_type = data_type;
setting->min = min;
setting->max = max;
setting->mul_factor = mul_factor;
setting->div_factor = div_factor;
setting->data = data;
setting->set = set;
setting->next = *p;
if (auto_remove)
setting->auto_remove = 1;
*p = setting;
mutex_unlock(&ide_setting_mtx);
return 0;
abort:
mutex_unlock(&ide_setting_mtx);
kfree(setting);
return -1;
}
int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
{
return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
}
EXPORT_SYMBOL(ide_add_setting);
/**
* __ide_remove_setting - remove an ide setting option
* @drive: drive to use
* @name: setting name
*
* Removes the setting named from the device if it is present.
* The caller must hold the setting semaphore.
*/
static void __ide_remove_setting(ide_drive_t *drive, char *name)
{
ide_settings_t **p, *setting;
p = (ide_settings_t **) &drive->settings;
while ((*p) && strcmp((*p)->name, name))
p = &((*p)->next);
setting = (*p);
if (setting == NULL)
return;
(*p) = setting->next;
kfree(setting->name);
kfree(setting);
}
/**
* auto_remove_settings - remove driver specific settings
* @drive: drive
*
* Automatically remove all the driver specific settings for this
* drive. This function may not be called from IRQ context. The
* caller must hold ide_setting_mtx.
*/
static void auto_remove_settings(ide_drive_t *drive)
{
ide_settings_t *setting;
repeat:
setting = drive->settings;
while (setting) {
if (setting->auto_remove) {
__ide_remove_setting(drive, setting->name);
goto repeat;
}
setting = setting->next;
}
}
/**
* ide_find_setting_by_name - find a drive specific setting
* @drive: drive to scan
* @name: setting name
*
* Scan's the device setting table for a matching entry and returns
* this or NULL if no entry is found. The caller must hold the
* setting semaphore
*/
static ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name)
{
ide_settings_t *setting = drive->settings;
while (setting) {
if (strcmp(setting->name, name) == 0)
break;
setting = setting->next;
}
return setting;
}
/**
* ide_read_setting - read an IDE setting
* @drive: drive to read from
* @setting: drive setting
*
* Read a drive setting and return the value. The caller
* must hold the ide_setting_mtx when making this call.
*
* BUGS: the data return and error are the same return value
* so an error -EINVAL and true return of the same value cannot
* be told apart
*/
static int ide_read_setting(ide_drive_t *drive, ide_settings_t *setting)
{
int val = -EINVAL;
unsigned long flags;
if ((setting->rw & SETTING_READ)) {
spin_lock_irqsave(&ide_lock, flags);
switch (setting->data_type) {
case TYPE_BYTE:
val = *((u8 *) setting->data);
break;
case TYPE_SHORT:
val = *((u16 *) setting->data);
break;
case TYPE_INT:
val = *((u32 *) setting->data);
break;
}
spin_unlock_irqrestore(&ide_lock, flags);
}
return val;
}
/**
* ide_write_setting - read an IDE setting
* @drive: drive to read from
* @setting: drive setting
* @val: value
*
* Write a drive setting if it is possible. The caller
* must hold the ide_setting_mtx when making this call.
*
* BUGS: the data return and error are the same return value
* so an error -EINVAL and true return of the same value cannot
* be told apart
*
* FIXME: This should be changed to enqueue a special request
* to the driver to change settings, and then wait on a sema for completion.
* The current scheme of polling is kludgy, though safe enough.
*/
static int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val)
{
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (setting->set)
return setting->set(drive, val);
if (!(setting->rw & SETTING_WRITE))
return -EPERM;
if (val < setting->min || val > setting->max)
return -EINVAL;
if (ide_spin_wait_hwgroup(drive))
return -EBUSY;
switch (setting->data_type) {
case TYPE_BYTE:
*((u8 *) setting->data) = val;
break;
case TYPE_SHORT:
*((u16 *) setting->data) = val;
break;
case TYPE_INT:
*((u32 *) setting->data) = val;
break;
}
spin_unlock_irq(&ide_lock);
return 0;
}
static int set_xfer_rate (ide_drive_t *drive, int arg)
{
ide_task_t task;
int err;
if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
return -EINVAL;
memset(&task, 0, sizeof(task));
task.tf.command = WIN_SETFEATURES;
task.tf.feature = SETFEATURES_XFER;
task.tf.nsect = (u8)arg;
task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT |
IDE_TFLAG_IN_NSECT;
err = ide_no_data_taskfile(drive, &task);
if (!err) {
ide_set_xfer_rate(drive, (u8) arg);
ide_driveid_update(drive);
}
return err;
}
/**
* ide_add_generic_settings - generic ide settings
* @drive: drive being configured
*
* Add the generic parts of the system settings to the /proc files.
* The caller must not be holding the ide_setting_mtx.
*/
void ide_add_generic_settings (ide_drive_t *drive)
{
/*
* drive setting name read/write access data type min max mul_factor div_factor data pointer set function
*/
__ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0);
__ide_add_setting(drive, "keepsettings", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
__ide_add_setting(drive, "nice1", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
__ide_add_setting(drive, "pio_mode", SETTING_WRITE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
__ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0);
__ide_add_setting(drive, "using_dma", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0);
__ide_add_setting(drive, "init_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
__ide_add_setting(drive, "current_speed", SETTING_RW, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
__ide_add_setting(drive, "number", SETTING_RW, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
}
static void proc_ide_settings_warn(void)
{
static int warned;
if (warned)
return;
printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
"obsolete, and will be removed soon!\n");
warned = 1;
}
static int proc_ide_read_settings
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
ide_settings_t *setting = (ide_settings_t *) drive->settings;
char *out = page;
int len, rc, mul_factor, div_factor;
proc_ide_settings_warn();
mutex_lock(&ide_setting_mtx);
out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
while (setting) {
mul_factor = setting->mul_factor;
div_factor = setting->div_factor;
out += sprintf(out, "%-24s", setting->name);
rc = ide_read_setting(drive, setting);
if (rc >= 0)
out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
else
out += sprintf(out, "%-16s", "write-only");
out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
if (setting->rw & SETTING_READ)
out += sprintf(out, "r");
if (setting->rw & SETTING_WRITE)
out += sprintf(out, "w");
out += sprintf(out, "\n");
setting = setting->next;
}
len = out - page;
mutex_unlock(&ide_setting_mtx);
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
#define MAX_LEN 30
static int proc_ide_write_settings(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
char name[MAX_LEN + 1];
int for_real = 0;
unsigned long n;
ide_settings_t *setting;
char *buf, *s;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
proc_ide_settings_warn();
if (count >= PAGE_SIZE)
return -EINVAL;
s = buf = (char *)__get_free_page(GFP_USER);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, buffer, count)) {
free_page((unsigned long)buf);
return -EFAULT;
}
buf[count] = '\0';
/*
* Skip over leading whitespace
*/
while (count && isspace(*s)) {
--count;
++s;
}
/*
* Do one full pass to verify all parameters,
* then do another to actually write the new settings.
*/
do {
char *p = s;
n = count;
while (n > 0) {
unsigned val;
char *q = p;
while (n > 0 && *p != ':') {
--n;
p++;
}
if (*p != ':')
goto parse_error;
if (p - q > MAX_LEN)
goto parse_error;
memcpy(name, q, p - q);
name[p - q] = 0;
if (n > 0) {
--n;
p++;
} else
goto parse_error;
val = simple_strtoul(p, &q, 10);
n -= q - p;
p = q;
if (n > 0 && !isspace(*p))
goto parse_error;
while (n > 0 && isspace(*p)) {
--n;
++p;
}
mutex_lock(&ide_setting_mtx);
setting = ide_find_setting_by_name(drive, name);
if (!setting) {
mutex_unlock(&ide_setting_mtx);
goto parse_error;
}
if (for_real)
ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
mutex_unlock(&ide_setting_mtx);
}
} while (!for_real++);
free_page((unsigned long)buf);
return count;
parse_error:
free_page((unsigned long)buf);
printk("proc_ide_write_settings(): parse error\n");
return -EINVAL;
}
int proc_ide_read_capacity
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
int proc_ide_read_geometry
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
char *out = page;
int len;
out += sprintf(out, "physical %d/%d/%d\n",
drive->cyl, drive->head, drive->sect);
out += sprintf(out, "logical %d/%d/%d\n",
drive->bios_cyl, drive->bios_head, drive->bios_sect);
len = out - page;
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
EXPORT_SYMBOL(proc_ide_read_geometry);
static int proc_ide_read_dmodel
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
struct hd_driveid *id = drive->id;
int len;
len = sprintf(page, "%.40s\n",
(id && id->model[0]) ? (char *)id->model : "(none)");
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static int proc_ide_read_driver
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
struct device *dev = &drive->gendev;
ide_driver_t *ide_drv;
int len;
if (dev->driver) {
ide_drv = container_of(dev->driver, ide_driver_t, gen_driver);
len = sprintf(page, "%s version %s\n",
dev->driver->name, ide_drv->version);
} else
len = sprintf(page, "ide-default version 0.9.newide\n");
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
{
struct device *dev = &drive->gendev;
int ret = 1;
int err;
device_release_driver(dev);
/* FIXME: device can still be in use by previous driver */
strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
__func__, err);
drive->driver_req[0] = 0;
if (dev->driver == NULL) {
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING
"IDE: %s: device_attach(2) error: %d\n",
__func__, err);
}
if (dev->driver && !strcmp(dev->driver->name, driver))
ret = 0;
return ret;
}
static int proc_ide_write_driver
(struct file *file, const char __user *buffer, unsigned long count, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
char name[32];
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (count > 31)
count = 31;
if (copy_from_user(name, buffer, count))
return -EFAULT;
name[count] = '\0';
if (ide_replace_subdriver(drive, name))
return -EINVAL;
return count;
}
static int proc_ide_read_media
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
const char *media;
int len;
switch (drive->media) {
case ide_disk: media = "disk\n"; break;
case ide_cdrom: media = "cdrom\n"; break;
case ide_tape: media = "tape\n"; break;
case ide_floppy: media = "floppy\n"; break;
case ide_optical: media = "optical\n"; break;
default: media = "UNKNOWN\n"; break;
}
strcpy(page, media);
len = strlen(media);
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static ide_proc_entry_t generic_drive_entries[] = {
{ "driver", S_IFREG|S_IRUGO, proc_ide_read_driver,
proc_ide_write_driver },
{ "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL },
{ "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL },
{ "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL },
{ "settings", S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
proc_ide_write_settings },
{ NULL, 0, NULL, NULL }
};
static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
{
struct proc_dir_entry *ent;
if (!dir || !p)
return;
while (p->name != NULL) {
ent = create_proc_entry(p->name, p->mode, dir);
if (!ent) return;
ent->data = data;
ent->read_proc = p->read_proc;
ent->write_proc = p->write_proc;
p++;
}
}
static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
{
if (!dir || !p)
return;
while (p->name != NULL) {
remove_proc_entry(p->name, dir);
p++;
}
}
void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver)
{
ide_add_proc_entries(drive->proc, driver->proc, drive);
}
EXPORT_SYMBOL(ide_proc_register_driver);
/**
* ide_proc_unregister_driver - remove driver specific data
* @drive: drive
* @driver: driver
*
* Clean up the driver specific /proc files and IDE settings
* for a given drive.
*
* Takes ide_setting_mtx and ide_lock.
* Caller must hold none of the locks.
*/
void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
{
unsigned long flags;
ide_remove_proc_entries(drive->proc, driver->proc);
mutex_lock(&ide_setting_mtx);
spin_lock_irqsave(&ide_lock, flags);
/*
* ide_setting_mtx protects the settings list
* ide_lock protects the use of settings
*
* so we need to hold both, ide_settings_sem because we want to
* modify the settings list, and ide_lock because we cannot take
* a setting out that is being used.
*
* OTOH both ide_{read,write}_setting are only ever used under
* ide_setting_mtx.
*/
auto_remove_settings(drive);
spin_unlock_irqrestore(&ide_lock, flags);
mutex_unlock(&ide_setting_mtx);
}
EXPORT_SYMBOL(ide_proc_unregister_driver);
void ide_proc_port_register_devices(ide_hwif_t *hwif)
{
int d;
struct proc_dir_entry *ent;
struct proc_dir_entry *parent = hwif->proc;
char name[64];
for (d = 0; d < MAX_DRIVES; d++) {
ide_drive_t *drive = &hwif->drives[d];
if (!drive->present)
continue;
if (drive->proc)
continue;
drive->proc = proc_mkdir(drive->name, parent);
if (drive->proc)
ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
ent = proc_symlink(drive->name, proc_ide_root, name);
if (!ent) return;
}
}
void ide_proc_unregister_device(ide_drive_t *drive)
{
if (drive->proc) {
ide_remove_proc_entries(drive->proc, generic_drive_entries);
remove_proc_entry(drive->name, proc_ide_root);
remove_proc_entry(drive->name, drive->hwif->proc);
drive->proc = NULL;
}
}
static ide_proc_entry_t hwif_entries[] = {
{ "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL },
{ "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL },
{ "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL },
{ NULL, 0, NULL, NULL }
};
void ide_proc_register_port(ide_hwif_t *hwif)
{
if (!hwif->proc) {
hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
if (!hwif->proc)
return;
ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
}
}
void ide_proc_unregister_port(ide_hwif_t *hwif)
{
if (hwif->proc) {
ide_remove_proc_entries(hwif->proc, hwif_entries);
remove_proc_entry(hwif->name, proc_ide_root);
hwif->proc = NULL;
}
}
static int proc_print_driver(struct device_driver *drv, void *data)
{
ide_driver_t *ide_drv = container_of(drv, ide_driver_t, gen_driver);
struct seq_file *s = data;
seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
return 0;
}
static int ide_drivers_show(struct seq_file *s, void *p)
{
int err;
err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
if (err < 0)
printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
__func__, err);
return 0;
}
static int ide_drivers_open(struct inode *inode, struct file *file)
{
return single_open(file, &ide_drivers_show, NULL);
}
static const struct file_operations ide_drivers_operations = {
.owner = THIS_MODULE,
.open = ide_drivers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void proc_ide_create(void)
{
proc_ide_root = proc_mkdir("ide", NULL);
if (!proc_ide_root)
return;
proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
}
void proc_ide_destroy(void)
{
remove_proc_entry("drivers", proc_ide_root);
remove_proc_entry("ide", NULL);
}