v4.19.13 snapshot.
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
new file mode 100644
index 0000000..45c9974
--- /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("setting", 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);
+}