diff options
Diffstat (limited to 'drivers/ide/ide-proc.c')
| -rw-r--r-- | drivers/ide/ide-proc.c | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c new file mode 100644 index 000000000000..bdff5ac58053 --- /dev/null +++ b/drivers/ide/ide-proc.c @@ -0,0 +1,521 @@ +/* + * 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; + + 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) +{ + 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; + ide_driver_t *driver = drive->driver; + int len; + + if (driver) { + len = sprintf(page, "%s version %s\n", + driver->name, driver->version); + } else + len = sprintf(page, "ide-default version 0.9.newide\n"); + 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) +{ + 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, 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); +} |