diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/ide/ide-proc.c | 644 |
1 files changed, 644 insertions, 0 deletions
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c new file mode 100644 index 000000000..0e51803de --- /dev/null +++ b/drivers/ide/ide-proc.c @@ -0,0 +1,644 @@ +/* + * Copyright (C) 1997-1998 Mark Lord + * Copyright (C) 2003 Red Hat + * + * 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 + */ + +#include <linux/module.h> + +#include <linux/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/ide.h> +#include <linux/seq_file.h> +#include <linux/slab.h> + +#include <asm/io.h> + +static struct proc_dir_entry *proc_ide_root; + +static int ide_imodel_proc_show(struct seq_file *m, void *v) +{ + ide_hwif_t *hwif = (ide_hwif_t *) m->private; + 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_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; + } + seq_printf(m, "%s\n", name); + return 0; +} + +static int ide_mate_proc_show(struct seq_file *m, void *v) +{ + ide_hwif_t *hwif = (ide_hwif_t *) m->private; + + if (hwif && hwif->mate) + seq_printf(m, "%s\n", hwif->mate->name); + else + seq_printf(m, "(none)\n"); + return 0; +} + +static int ide_channel_proc_show(struct seq_file *m, void *v) +{ + ide_hwif_t *hwif = (ide_hwif_t *) m->private; + + seq_printf(m, "%c\n", hwif->channel ? '1' : '0'); + return 0; +} + +static int ide_identify_proc_show(struct seq_file *m, void *v) +{ + ide_drive_t *drive = (ide_drive_t *)m->private; + u8 *buf; + + if (!drive) { + seq_putc(m, '\n'); + return 0; + } + + buf = kmalloc(SECTOR_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + if (taskfile_lib_get_identify(drive, buf) == 0) { + __le16 *val = (__le16 *)buf; + int i; + + for (i = 0; i < SECTOR_SIZE / 2; i++) { + seq_printf(m, "%04x%c", le16_to_cpu(val[i]), + (i % 8) == 7 ? '\n' : ' '); + } + } else + seq_putc(m, buf[0]); + kfree(buf); + return 0; +} + +/** + * ide_find_setting - find a specific setting + * @st: setting table pointer + * @name: setting name + * + * Scan's the setting table for a matching entry and returns + * this or NULL if no entry is found. The caller must hold the + * setting semaphore + */ + +static +const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st, + char *name) +{ + while (st->name) { + if (strcmp(st->name, name) == 0) + break; + st++; + } + return st->name ? st : NULL; +} + +/** + * 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, + const struct ide_proc_devset *setting) +{ + const struct ide_devset *ds = setting->setting; + int val = -EINVAL; + + if (ds->get) + val = ds->get(drive); + + 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, + const struct ide_proc_devset *setting, int val) +{ + const struct ide_devset *ds = setting->setting; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + if (!ds->set) + return -EPERM; + if ((ds->flags & DS_SYNC) + && (val < setting->min || val > setting->max)) + return -EINVAL; + return ide_devset_execute(drive, ds, val); +} + +ide_devset_get(xfer_rate, current_speed); + +static int set_xfer_rate (ide_drive_t *drive, int arg) +{ + struct ide_cmd cmd; + + if (arg < XFER_PIO_0 || arg > XFER_UDMA_6) + return -EINVAL; + + memset(&cmd, 0, sizeof(cmd)); + cmd.tf.command = ATA_CMD_SET_FEATURES; + cmd.tf.feature = SETFEATURES_XFER; + cmd.tf.nsect = (u8)arg; + cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT; + cmd.valid.in.tf = IDE_VALID_NSECT; + cmd.tf_flags = IDE_TFLAG_SET_XFER; + + return ide_no_data_taskfile(drive, &cmd); +} + +ide_devset_rw(current_speed, xfer_rate); +ide_devset_rw_field(init_speed, init_speed); +ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1); +ide_devset_rw_field(number, dn); + +static const struct ide_proc_devset ide_generic_settings[] = { + IDE_PROC_DEVSET(current_speed, 0, 70), + IDE_PROC_DEVSET(init_speed, 0, 70), + IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)), + IDE_PROC_DEVSET(keepsettings, 0, 1), + IDE_PROC_DEVSET(nice1, 0, 1), + IDE_PROC_DEVSET(number, 0, 3), + IDE_PROC_DEVSET(pio_mode, 0, 255), + IDE_PROC_DEVSET(unmaskirq, 0, 1), + IDE_PROC_DEVSET(using_dma, 0, 1), + { NULL }, +}; + +static void proc_ide_settings_warn(void) +{ + printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " + "obsolete, and will be removed soon!\n"); +} + +static int ide_settings_proc_show(struct seq_file *m, void *v) +{ + const struct ide_proc_devset *setting, *g, *d; + const struct ide_devset *ds; + ide_drive_t *drive = (ide_drive_t *) m->private; + int rc, mul_factor, div_factor; + + proc_ide_settings_warn(); + + mutex_lock(&ide_setting_mtx); + g = ide_generic_settings; + d = drive->settings; + seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); + seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); + while (g->name || (d && d->name)) { + /* read settings in the alphabetical order */ + if (g->name && d && d->name) { + if (strcmp(d->name, g->name) < 0) + setting = d++; + else + setting = g++; + } else if (d && d->name) { + setting = d++; + } else + setting = g++; + mul_factor = setting->mulf ? setting->mulf(drive) : 1; + div_factor = setting->divf ? setting->divf(drive) : 1; + seq_printf(m, "%-24s", setting->name); + rc = ide_read_setting(drive, setting); + if (rc >= 0) + seq_printf(m, "%-16d", rc * mul_factor / div_factor); + else + seq_printf(m, "%-16s", "write-only"); + seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); + ds = setting->setting; + if (ds->get) + seq_printf(m, "r"); + if (ds->set) + seq_printf(m, "w"); + seq_printf(m, "\n"); + } + mutex_unlock(&ide_setting_mtx); + return 0; +} + +static int ide_settings_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, ide_settings_proc_show, PDE_DATA(inode)); +} + +#define MAX_LEN 30 + +static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *pos) +{ + ide_drive_t *drive = PDE_DATA(file_inode(file)); + char name[MAX_LEN + 1]; + int for_real = 0, mul_factor, div_factor; + unsigned long n; + + const struct ide_proc_devset *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); + /* generic settings first, then driver specific ones */ + setting = ide_find_setting(ide_generic_settings, name); + if (!setting) { + if (drive->settings) + setting = ide_find_setting(drive->settings, name); + if (!setting) { + mutex_unlock(&ide_setting_mtx); + goto parse_error; + } + } + if (for_real) { + mul_factor = setting->mulf ? setting->mulf(drive) : 1; + div_factor = setting->divf ? setting->divf(drive) : 1; + ide_write_setting(drive, setting, val * div_factor / 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("%s(): parse error\n", __func__); + return -EINVAL; +} + +static const struct file_operations ide_settings_proc_fops = { + .owner = THIS_MODULE, + .open = ide_settings_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = ide_settings_proc_write, +}; + +int ide_capacity_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%llu\n", (long long)0x7fffffff); + return 0; +} +EXPORT_SYMBOL_GPL(ide_capacity_proc_show); + +int ide_geometry_proc_show(struct seq_file *m, void *v) +{ + ide_drive_t *drive = (ide_drive_t *) m->private; + + seq_printf(m, "physical %d/%d/%d\n", + drive->cyl, drive->head, drive->sect); + seq_printf(m, "logical %d/%d/%d\n", + drive->bios_cyl, drive->bios_head, drive->bios_sect); + return 0; +} +EXPORT_SYMBOL(ide_geometry_proc_show); + +static int ide_dmodel_proc_show(struct seq_file *seq, void *v) +{ + ide_drive_t *drive = (ide_drive_t *) seq->private; + char *m = (char *)&drive->id[ATA_ID_PROD]; + + seq_printf(seq, "%.40s\n", m[0] ? m : "(none)"); + return 0; +} + +static int ide_driver_proc_show(struct seq_file *m, void *v) +{ + ide_drive_t *drive = (ide_drive_t *)m->private; + struct device *dev = &drive->gendev; + struct ide_driver *ide_drv; + + if (dev->driver) { + ide_drv = to_ide_driver(dev->driver); + seq_printf(m, "%s version %s\n", + dev->driver->name, ide_drv->version); + } else + seq_printf(m, "ide-default version 0.9.newide\n"); + return 0; +} + +static int ide_media_proc_show(struct seq_file *m, void *v) +{ + ide_drive_t *drive = (ide_drive_t *) m->private; + const char *media; + + 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; + } + seq_puts(m, media); + return 0; +} + +static int ide_media_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, ide_media_proc_show, PDE_DATA(inode)); +} + +static const struct file_operations ide_media_proc_fops = { + .owner = THIS_MODULE, + .open = ide_media_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static ide_proc_entry_t generic_drive_entries[] = { + { "driver", S_IFREG|S_IRUGO, ide_driver_proc_show }, + { "identify", S_IFREG|S_IRUSR, ide_identify_proc_show }, + { "media", S_IFREG|S_IRUGO, ide_media_proc_show }, + { "model", S_IFREG|S_IRUGO, ide_dmodel_proc_show }, + {} +}; + +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 = proc_create_single_data(p->name, p->mode, dir, p->show, data); + if (!ent) return; + 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, struct ide_driver *driver) +{ + mutex_lock(&ide_setting_mtx); + drive->settings = driver->proc_devsets(drive); + mutex_unlock(&ide_setting_mtx); + + ide_add_proc_entries(drive->proc, driver->proc_entries(drive), 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. + */ + +void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver) +{ + ide_remove_proc_entries(drive->proc, driver->proc_entries(drive)); + + mutex_lock(&ide_setting_mtx); + /* + * ide_setting_mtx protects both the settings list and the use + * of settings (we cannot take a setting out that is being used). + */ + drive->settings = NULL; + mutex_unlock(&ide_setting_mtx); +} +EXPORT_SYMBOL(ide_proc_unregister_driver); + +void ide_proc_port_register_devices(ide_hwif_t *hwif) +{ + struct proc_dir_entry *ent; + struct proc_dir_entry *parent = hwif->proc; + ide_drive_t *drive; + char name[64]; + int i; + + ide_port_for_each_dev(i, drive, hwif) { + if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) + continue; + + drive->proc = proc_mkdir(drive->name, parent); + if (drive->proc) { + ide_add_proc_entries(drive->proc, generic_drive_entries, drive); + proc_create_data("settings", S_IFREG|S_IRUSR|S_IWUSR, + drive->proc, &ide_settings_proc_fops, + 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) { + remove_proc_entry("settings", 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, ide_channel_proc_show }, + { "mate", S_IFREG|S_IRUGO, ide_mate_proc_show }, + { "model", S_IFREG|S_IRUGO, ide_imodel_proc_show }, + {} +}; + +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) +{ + struct ide_driver *ide_drv = to_ide_driver(drv); + 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); +} |