| /* |
| * 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 <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/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_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) { |
| __le16 *val = (__le16 *)page; |
| |
| err = taskfile_lib_get_identify(drive, page); |
| if (!err) { |
| char *out = (char *)page + SECTOR_SIZE; |
| |
| page = out; |
| do { |
| out += sprintf(out, "%04x%c", |
| le16_to_cpup(val), (++i & 7) ? ' ' : '\n'); |
| val += 1; |
| } while (i < SECTOR_SIZE / 2); |
| len = out - page; |
| } |
| } |
| PROC_IDE_READ_RETURN(page, start, off, count, eof, len); |
| } |
| |
| /** |
| * 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) |
| { |
| 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 = ATA_CMD_SET_FEATURES; |
| 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_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), |
| { 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) |
| { |
| const struct ide_proc_devset *setting, *g, *d; |
| const struct ide_devset *ds; |
| ide_drive_t *drive = (ide_drive_t *) data; |
| char *out = page; |
| int len, rc, mul_factor, div_factor; |
| |
| proc_ide_settings_warn(); |
| |
| mutex_lock(&ide_setting_mtx); |
| g = ide_generic_settings; |
| d = drive->settings; |
| 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 (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; |
| 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); |
| ds = setting->setting; |
| if (ds->get) |
| out += sprintf(out, "r"); |
| if (ds->set) |
| out += sprintf(out, "w"); |
| out += sprintf(out, "\n"); |
| } |
| 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, 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("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; |
| char *m = (char *)&drive->id[ATA_ID_PROD]; |
| int len; |
| |
| len = sprintf(page, "%.40s\n", m[0] ? m : "(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; |
| struct ide_driver *ide_drv; |
| int len; |
| |
| if (dev->driver) { |
| ide_drv = to_ide_driver(dev->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, 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) |
| { |
| 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->dev_flags & IDE_DFLAG_PRESENT) == 0 || 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) |
| { |
| 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); |
| } |