blob: 0344ce8f6ef46d131aeea5e28c237bb818463e7d [file] [log] [blame]
/*
* linux/drivers/ide/ide-proc.c Version 1.05 Mar 05, 2003
*
* Copyright (C) 1997-1998 Mark Lord
* Copyright (C) 2003 Red Hat <alan@redhat.com>
*/
/*
* 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/config.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/sched.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 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;
/*
* Neither ide_unknown nor ide_forced should be set at this point.
*/
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;
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 && hwif->mate->present)
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;
BUG_ON(!drive->driver);
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);
}
static void proc_ide_settings_warn(void)
{
static int warned = 0;
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();
down(&ide_setting_sem);
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);
if ((rc = ide_read_setting(drive, setting)) >= 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;
up(&ide_setting_sem);
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;
}
down(&ide_setting_sem);
setting = ide_find_setting_by_name(drive, name);
if (!setting)
{
up(&ide_setting_sem);
goto parse_error;
}
if (for_real)
ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
up(&ide_setting_sem);
}
} 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)
{
ide_drive_t *drive = (ide_drive_t *) data;
int len;
len = sprintf(page,"%llu\n",
(long long) (DRIVER(drive)->capacity(drive)));
PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}
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;
ide_driver_t *driver = drive->driver;
int len;
len = sprintf(page, "%s version %s\n",
driver->name, driver->version);
PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}
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;
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 }
};
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->nlink = 1;
ent->data = data;
ent->read_proc = p->read_proc;
ent->write_proc = p->write_proc;
p++;
}
}
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++;
}
}
static void create_proc_ide_drives(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;
}
}
static void destroy_proc_ide_device(ide_hwif_t *hwif, ide_drive_t *drive)
{
ide_driver_t *driver = drive->driver;
if (drive->proc) {
ide_remove_proc_entries(drive->proc, driver->proc);
ide_remove_proc_entries(drive->proc, generic_drive_entries);
remove_proc_entry(drive->name, proc_ide_root);
remove_proc_entry(drive->name, hwif->proc);
drive->proc = NULL;
}
}
static void destroy_proc_ide_drives(ide_hwif_t *hwif)
{
int d;
for (d = 0; d < MAX_DRIVES; d++) {
ide_drive_t *drive = &hwif->drives[d];
if (drive->proc)
destroy_proc_ide_device(hwif, drive);
}
}
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 create_proc_ide_interfaces(void)
{
int h;
for (h = 0; h < MAX_HWIFS; h++) {
ide_hwif_t *hwif = &ide_hwifs[h];
if (!hwif->present)
continue;
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);
}
create_proc_ide_drives(hwif);
}
}
EXPORT_SYMBOL(create_proc_ide_interfaces);
#ifdef CONFIG_BLK_DEV_IDEPCI
void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
{
create_proc_info_entry(name, 0, proc_ide_root, get_info);
}
EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
#endif
void destroy_proc_ide_interface(ide_hwif_t *hwif)
{
if (hwif->proc) {
destroy_proc_ide_drives(hwif);
ide_remove_proc_entries(hwif->proc, hwif_entries);
remove_proc_entry(hwif->name, proc_ide_root);
hwif->proc = NULL;
}
}
extern struct seq_operations ide_drivers_op;
static int ide_drivers_open(struct inode *inode, struct file *file)
{
return seq_open(file, &ide_drivers_op);
}
static struct file_operations ide_drivers_operations = {
.open = ide_drivers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
void proc_ide_create(void)
{
struct proc_dir_entry *entry;
if (!proc_ide_root)
return;
create_proc_ide_interfaces();
entry = create_proc_entry("drivers", 0, proc_ide_root);
if (entry)
entry->proc_fops = &ide_drivers_operations;
}
void proc_ide_destroy(void)
{
remove_proc_entry("ide/drivers", proc_ide_root);
remove_proc_entry("ide", NULL);
}