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633 lines
15 KiB
633 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 1997-1998 Mark Lord |
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* Copyright (C) 2003 Red Hat |
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* |
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* Some code was moved here from ide.c, see it for original copyrights. |
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*/ |
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|
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/* |
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* This is the /proc/ide/ filesystem implementation. |
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* |
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* Drive/Driver settings can be retrieved by reading the drive's |
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* "settings" files. e.g. "cat /proc/ide0/hda/settings" |
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* To write a new value "val" into a specific setting "name", use: |
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* echo "name:val" >/proc/ide/ide0/hda/settings |
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*/ |
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|
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#include <linux/module.h> |
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|
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#include <linux/uaccess.h> |
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#include <linux/errno.h> |
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#include <linux/proc_fs.h> |
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#include <linux/stat.h> |
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#include <linux/mm.h> |
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#include <linux/pci.h> |
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#include <linux/ctype.h> |
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#include <linux/ide.h> |
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#include <linux/seq_file.h> |
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#include <linux/slab.h> |
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#include <asm/io.h> |
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static struct proc_dir_entry *proc_ide_root; |
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static int ide_imodel_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_hwif_t *hwif = (ide_hwif_t *) m->private; |
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const char *name; |
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switch (hwif->chipset) { |
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case ide_generic: name = "generic"; break; |
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case ide_pci: name = "pci"; break; |
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case ide_cmd640: name = "cmd640"; break; |
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case ide_dtc2278: name = "dtc2278"; break; |
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case ide_ali14xx: name = "ali14xx"; break; |
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case ide_qd65xx: name = "qd65xx"; break; |
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case ide_umc8672: name = "umc8672"; break; |
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case ide_ht6560b: name = "ht6560b"; break; |
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case ide_4drives: name = "4drives"; break; |
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case ide_pmac: name = "mac-io"; break; |
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case ide_au1xxx: name = "au1xxx"; break; |
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case ide_palm3710: name = "palm3710"; break; |
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case ide_acorn: name = "acorn"; break; |
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default: name = "(unknown)"; break; |
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} |
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seq_printf(m, "%s\n", name); |
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return 0; |
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} |
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static int ide_mate_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_hwif_t *hwif = (ide_hwif_t *) m->private; |
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|
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if (hwif && hwif->mate) |
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seq_printf(m, "%s\n", hwif->mate->name); |
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else |
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seq_printf(m, "(none)\n"); |
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return 0; |
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} |
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static int ide_channel_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_hwif_t *hwif = (ide_hwif_t *) m->private; |
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seq_printf(m, "%c\n", hwif->channel ? '1' : '0'); |
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return 0; |
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} |
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static int ide_identify_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_drive_t *drive = (ide_drive_t *)m->private; |
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u8 *buf; |
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if (!drive) { |
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seq_putc(m, '\n'); |
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return 0; |
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} |
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buf = kmalloc(SECTOR_SIZE, GFP_KERNEL); |
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if (!buf) |
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return -ENOMEM; |
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if (taskfile_lib_get_identify(drive, buf) == 0) { |
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__le16 *val = (__le16 *)buf; |
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int i; |
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for (i = 0; i < SECTOR_SIZE / 2; i++) { |
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seq_printf(m, "%04x%c", le16_to_cpu(val[i]), |
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(i % 8) == 7 ? '\n' : ' '); |
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} |
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} else |
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seq_putc(m, buf[0]); |
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kfree(buf); |
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return 0; |
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} |
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/** |
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* ide_find_setting - find a specific setting |
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* @st: setting table pointer |
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* @name: setting name |
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* |
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* Scan's the setting table for a matching entry and returns |
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* this or NULL if no entry is found. The caller must hold the |
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* setting semaphore |
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*/ |
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static |
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const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st, |
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char *name) |
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{ |
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while (st->name) { |
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if (strcmp(st->name, name) == 0) |
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break; |
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st++; |
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} |
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return st->name ? st : NULL; |
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} |
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/** |
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* ide_read_setting - read an IDE setting |
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* @drive: drive to read from |
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* @setting: drive setting |
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* |
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* Read a drive setting and return the value. The caller |
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* must hold the ide_setting_mtx when making this call. |
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* |
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* BUGS: the data return and error are the same return value |
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* so an error -EINVAL and true return of the same value cannot |
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* be told apart |
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*/ |
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static int ide_read_setting(ide_drive_t *drive, |
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const struct ide_proc_devset *setting) |
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{ |
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const struct ide_devset *ds = setting->setting; |
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int val = -EINVAL; |
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if (ds->get) |
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val = ds->get(drive); |
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return val; |
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} |
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/** |
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* ide_write_setting - read an IDE setting |
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* @drive: drive to read from |
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* @setting: drive setting |
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* @val: value |
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* |
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* Write a drive setting if it is possible. The caller |
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* must hold the ide_setting_mtx when making this call. |
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* |
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* BUGS: the data return and error are the same return value |
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* so an error -EINVAL and true return of the same value cannot |
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* be told apart |
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* |
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* FIXME: This should be changed to enqueue a special request |
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* to the driver to change settings, and then wait on a sema for completion. |
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* The current scheme of polling is kludgy, though safe enough. |
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*/ |
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static int ide_write_setting(ide_drive_t *drive, |
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const struct ide_proc_devset *setting, int val) |
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{ |
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const struct ide_devset *ds = setting->setting; |
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if (!capable(CAP_SYS_ADMIN)) |
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return -EACCES; |
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if (!ds->set) |
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return -EPERM; |
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if ((ds->flags & DS_SYNC) |
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&& (val < setting->min || val > setting->max)) |
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return -EINVAL; |
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return ide_devset_execute(drive, ds, val); |
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} |
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ide_devset_get(xfer_rate, current_speed); |
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static int set_xfer_rate (ide_drive_t *drive, int arg) |
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{ |
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struct ide_cmd cmd; |
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if (arg < XFER_PIO_0 || arg > XFER_UDMA_6) |
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return -EINVAL; |
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memset(&cmd, 0, sizeof(cmd)); |
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cmd.tf.command = ATA_CMD_SET_FEATURES; |
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cmd.tf.feature = SETFEATURES_XFER; |
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cmd.tf.nsect = (u8)arg; |
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cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT; |
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cmd.valid.in.tf = IDE_VALID_NSECT; |
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cmd.tf_flags = IDE_TFLAG_SET_XFER; |
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return ide_no_data_taskfile(drive, &cmd); |
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} |
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ide_devset_rw(current_speed, xfer_rate); |
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ide_devset_rw_field(init_speed, init_speed); |
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ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1); |
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ide_devset_ro_field(number, dn); |
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static const struct ide_proc_devset ide_generic_settings[] = { |
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IDE_PROC_DEVSET(current_speed, 0, 70), |
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IDE_PROC_DEVSET(init_speed, 0, 70), |
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IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)), |
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IDE_PROC_DEVSET(keepsettings, 0, 1), |
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IDE_PROC_DEVSET(nice1, 0, 1), |
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IDE_PROC_DEVSET(number, 0, 3), |
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IDE_PROC_DEVSET(pio_mode, 0, 255), |
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IDE_PROC_DEVSET(unmaskirq, 0, 1), |
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IDE_PROC_DEVSET(using_dma, 0, 1), |
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{ NULL }, |
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}; |
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static void proc_ide_settings_warn(void) |
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{ |
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printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is " |
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"obsolete, and will be removed soon!\n"); |
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} |
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static int ide_settings_proc_show(struct seq_file *m, void *v) |
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{ |
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const struct ide_proc_devset *setting, *g, *d; |
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const struct ide_devset *ds; |
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ide_drive_t *drive = (ide_drive_t *) m->private; |
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int rc, mul_factor, div_factor; |
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proc_ide_settings_warn(); |
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mutex_lock(&ide_setting_mtx); |
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g = ide_generic_settings; |
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d = drive->settings; |
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seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n"); |
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seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n"); |
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while (g->name || (d && d->name)) { |
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/* read settings in the alphabetical order */ |
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if (g->name && d && d->name) { |
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if (strcmp(d->name, g->name) < 0) |
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setting = d++; |
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else |
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setting = g++; |
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} else if (d && d->name) { |
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setting = d++; |
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} else |
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setting = g++; |
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mul_factor = setting->mulf ? setting->mulf(drive) : 1; |
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div_factor = setting->divf ? setting->divf(drive) : 1; |
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seq_printf(m, "%-24s", setting->name); |
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rc = ide_read_setting(drive, setting); |
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if (rc >= 0) |
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seq_printf(m, "%-16d", rc * mul_factor / div_factor); |
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else |
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seq_printf(m, "%-16s", "write-only"); |
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seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor); |
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ds = setting->setting; |
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if (ds->get) |
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seq_printf(m, "r"); |
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if (ds->set) |
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seq_printf(m, "w"); |
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seq_printf(m, "\n"); |
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} |
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mutex_unlock(&ide_setting_mtx); |
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return 0; |
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} |
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static int ide_settings_proc_open(struct inode *inode, struct file *file) |
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{ |
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return single_open(file, ide_settings_proc_show, PDE_DATA(inode)); |
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} |
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#define MAX_LEN 30 |
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static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer, |
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size_t count, loff_t *pos) |
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{ |
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ide_drive_t *drive = PDE_DATA(file_inode(file)); |
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char name[MAX_LEN + 1]; |
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int for_real = 0, mul_factor, div_factor; |
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unsigned long n; |
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const struct ide_proc_devset *setting; |
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char *buf, *s; |
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if (!capable(CAP_SYS_ADMIN)) |
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return -EACCES; |
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proc_ide_settings_warn(); |
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if (count >= PAGE_SIZE) |
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return -EINVAL; |
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s = buf = (char *)__get_free_page(GFP_USER); |
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if (!buf) |
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return -ENOMEM; |
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if (copy_from_user(buf, buffer, count)) { |
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free_page((unsigned long)buf); |
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return -EFAULT; |
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} |
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buf[count] = '\0'; |
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/* |
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* Skip over leading whitespace |
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*/ |
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while (count && isspace(*s)) { |
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--count; |
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++s; |
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} |
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/* |
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* Do one full pass to verify all parameters, |
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* then do another to actually write the new settings. |
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*/ |
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do { |
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char *p = s; |
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n = count; |
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while (n > 0) { |
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unsigned val; |
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char *q = p; |
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while (n > 0 && *p != ':') { |
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--n; |
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p++; |
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} |
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if (*p != ':') |
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goto parse_error; |
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if (p - q > MAX_LEN) |
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goto parse_error; |
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memcpy(name, q, p - q); |
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name[p - q] = 0; |
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if (n > 0) { |
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--n; |
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p++; |
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} else |
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goto parse_error; |
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val = simple_strtoul(p, &q, 10); |
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n -= q - p; |
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p = q; |
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if (n > 0 && !isspace(*p)) |
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goto parse_error; |
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while (n > 0 && isspace(*p)) { |
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--n; |
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++p; |
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} |
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mutex_lock(&ide_setting_mtx); |
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/* generic settings first, then driver specific ones */ |
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setting = ide_find_setting(ide_generic_settings, name); |
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if (!setting) { |
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if (drive->settings) |
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setting = ide_find_setting(drive->settings, name); |
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if (!setting) { |
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mutex_unlock(&ide_setting_mtx); |
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goto parse_error; |
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} |
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} |
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if (for_real) { |
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mul_factor = setting->mulf ? setting->mulf(drive) : 1; |
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div_factor = setting->divf ? setting->divf(drive) : 1; |
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ide_write_setting(drive, setting, val * div_factor / mul_factor); |
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} |
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mutex_unlock(&ide_setting_mtx); |
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} |
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} while (!for_real++); |
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free_page((unsigned long)buf); |
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return count; |
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parse_error: |
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free_page((unsigned long)buf); |
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printk("%s(): parse error\n", __func__); |
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return -EINVAL; |
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} |
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static const struct proc_ops ide_settings_proc_ops = { |
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.proc_open = ide_settings_proc_open, |
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.proc_read = seq_read, |
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.proc_lseek = seq_lseek, |
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.proc_release = single_release, |
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.proc_write = ide_settings_proc_write, |
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}; |
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int ide_capacity_proc_show(struct seq_file *m, void *v) |
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{ |
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seq_printf(m, "%llu\n", (long long)0x7fffffff); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(ide_capacity_proc_show); |
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int ide_geometry_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_drive_t *drive = (ide_drive_t *) m->private; |
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seq_printf(m, "physical %d/%d/%d\n", |
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drive->cyl, drive->head, drive->sect); |
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seq_printf(m, "logical %d/%d/%d\n", |
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drive->bios_cyl, drive->bios_head, drive->bios_sect); |
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return 0; |
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} |
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EXPORT_SYMBOL(ide_geometry_proc_show); |
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static int ide_dmodel_proc_show(struct seq_file *seq, void *v) |
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{ |
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ide_drive_t *drive = (ide_drive_t *) seq->private; |
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char *m = (char *)&drive->id[ATA_ID_PROD]; |
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seq_printf(seq, "%.40s\n", m[0] ? m : "(none)"); |
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return 0; |
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} |
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static int ide_driver_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_drive_t *drive = (ide_drive_t *)m->private; |
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struct device *dev = &drive->gendev; |
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struct ide_driver *ide_drv; |
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if (dev->driver) { |
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ide_drv = to_ide_driver(dev->driver); |
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seq_printf(m, "%s version %s\n", |
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dev->driver->name, ide_drv->version); |
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} else |
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seq_printf(m, "ide-default version 0.9.newide\n"); |
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return 0; |
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} |
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static int ide_media_proc_show(struct seq_file *m, void *v) |
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{ |
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ide_drive_t *drive = (ide_drive_t *) m->private; |
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const char *media; |
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switch (drive->media) { |
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case ide_disk: media = "disk\n"; break; |
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case ide_cdrom: media = "cdrom\n"; break; |
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case ide_tape: media = "tape\n"; break; |
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case ide_floppy: media = "floppy\n"; break; |
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case ide_optical: media = "optical\n"; break; |
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default: media = "UNKNOWN\n"; break; |
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} |
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seq_puts(m, media); |
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return 0; |
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} |
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static int ide_media_proc_open(struct inode *inode, struct file *file) |
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{ |
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return single_open(file, ide_media_proc_show, PDE_DATA(inode)); |
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} |
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static const struct file_operations ide_media_proc_fops = { |
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.owner = THIS_MODULE, |
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.open = ide_media_proc_open, |
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.read = seq_read, |
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.llseek = seq_lseek, |
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.release = single_release, |
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}; |
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static ide_proc_entry_t generic_drive_entries[] = { |
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{ "driver", S_IFREG|S_IRUGO, ide_driver_proc_show }, |
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{ "identify", S_IFREG|S_IRUSR, ide_identify_proc_show }, |
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{ "media", S_IFREG|S_IRUGO, ide_media_proc_show }, |
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{ "model", S_IFREG|S_IRUGO, ide_dmodel_proc_show }, |
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{} |
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}; |
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static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data) |
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{ |
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struct proc_dir_entry *ent; |
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|
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if (!dir || !p) |
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return; |
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while (p->name != NULL) { |
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ent = proc_create_single_data(p->name, p->mode, dir, p->show, data); |
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if (!ent) return; |
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p++; |
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} |
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} |
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static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p) |
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{ |
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if (!dir || !p) |
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return; |
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while (p->name != NULL) { |
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remove_proc_entry(p->name, dir); |
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p++; |
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} |
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} |
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void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver) |
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{ |
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mutex_lock(&ide_setting_mtx); |
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drive->settings = driver->proc_devsets(drive); |
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mutex_unlock(&ide_setting_mtx); |
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ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive); |
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} |
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EXPORT_SYMBOL(ide_proc_register_driver); |
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|
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/** |
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* ide_proc_unregister_driver - remove driver specific data |
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* @drive: drive |
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* @driver: driver |
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* |
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* Clean up the driver specific /proc files and IDE settings |
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* for a given drive. |
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* |
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* Takes ide_setting_mtx. |
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*/ |
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void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver) |
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{ |
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ide_remove_proc_entries(drive->proc, driver->proc_entries(drive)); |
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mutex_lock(&ide_setting_mtx); |
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/* |
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* ide_setting_mtx protects both the settings list and the use |
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* of settings (we cannot take a setting out that is being used). |
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*/ |
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drive->settings = NULL; |
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mutex_unlock(&ide_setting_mtx); |
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} |
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EXPORT_SYMBOL(ide_proc_unregister_driver); |
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|
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void ide_proc_port_register_devices(ide_hwif_t *hwif) |
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{ |
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struct proc_dir_entry *ent; |
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struct proc_dir_entry *parent = hwif->proc; |
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ide_drive_t *drive; |
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char name[64]; |
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int i; |
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|
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ide_port_for_each_dev(i, drive, hwif) { |
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if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
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continue; |
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|
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drive->proc = proc_mkdir(drive->name, parent); |
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if (drive->proc) { |
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ide_add_proc_entries(drive->proc, generic_drive_entries, drive); |
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proc_create_data("settings", S_IFREG|S_IRUSR|S_IWUSR, |
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drive->proc, &ide_settings_proc_ops, |
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drive); |
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} |
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sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name); |
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ent = proc_symlink(drive->name, proc_ide_root, name); |
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if (!ent) return; |
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} |
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} |
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|
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void ide_proc_unregister_device(ide_drive_t *drive) |
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{ |
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if (drive->proc) { |
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remove_proc_entry("settings", drive->proc); |
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ide_remove_proc_entries(drive->proc, generic_drive_entries); |
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remove_proc_entry(drive->name, proc_ide_root); |
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remove_proc_entry(drive->name, drive->hwif->proc); |
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drive->proc = NULL; |
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} |
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} |
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|
|
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; |
|
} |
|
|
|
DEFINE_PROC_SHOW_ATTRIBUTE(ide_drivers); |
|
|
|
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_proc_ops); |
|
} |
|
|
|
void proc_ide_destroy(void) |
|
{ |
|
remove_proc_entry("drivers", proc_ide_root); |
|
remove_proc_entry("ide", NULL); |
|
}
|
|
|