/* * 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_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) { __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) { unsigned long flags; spin_lock_irqsave(&ide_lock, flags); val = ds->get(drive); 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, 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; 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) { 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 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_entries(drive)); 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. */ drive->settings = NULL; 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->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) { 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); }