drivers/ide/ide-disk_proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/ide.h>
   4 #include <linux/slab.h>
   5 #include <linux/export.h>
   6 #include <linux/seq_file.h>
   7
   8 #include "ide-disk.h"
   9
  10 static int smart_enable(ide_drive_t *drive)
  11 {
  12         struct ide_cmd cmd;
  13         struct ide_taskfile *tf = &cmd.tf;
  14
  15         memset(&cmd, 0, sizeof(cmd));
  16         tf->feature = ATA_SMART_ENABLE;
  17         tf->lbam    = ATA_SMART_LBAM_PASS;
  18         tf->lbah    = ATA_SMART_LBAH_PASS;
  19         tf->command = ATA_CMD_SMART;
  20         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  21         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  22
  23         return ide_no_data_taskfile(drive, &cmd);
  24 }
  25
  26 static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
  27 {
  28         struct ide_cmd cmd;
  29         struct ide_taskfile *tf = &cmd.tf;
  30
  31         memset(&cmd, 0, sizeof(cmd));
  32         tf->feature = sub_cmd;
  33         tf->nsect   = 0x01;
  34         tf->lbam    = ATA_SMART_LBAM_PASS;
  35         tf->lbah    = ATA_SMART_LBAH_PASS;
  36         tf->command = ATA_CMD_SMART;
  37         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  38         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  39         cmd.protocol = ATA_PROT_PIO;
  40
  41         return ide_raw_taskfile(drive, &cmd, buf, 1);
  42 }
  43
  44 static int idedisk_cache_proc_show(struct seq_file *m, void *v)
  45 {
  46         ide_drive_t     *drive = (ide_drive_t *) m->private;
  47
  48         if (drive->dev_flags & IDE_DFLAG_ID_READ)
  49                 seq_printf(m, "%i\n", drive->id[ATA_ID_BUF_SIZE] / 2);
  50         else
  51                 seq_printf(m, "(none)\n");
  52         return 0;
  53 }
  54
  55 static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
  56 {
  57         ide_drive_t*drive = (ide_drive_t *)m->private;
  58
  59         seq_printf(m, "%llu\n", (long long)ide_gd_capacity(drive));
  60         return 0;
  61 }
  62
  63 static int __idedisk_proc_show(struct seq_file *m, ide_drive_t *drive, u8 sub_cmd)
  64 {
  65         u8 *buf;
  66
  67         buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
  68         if (!buf)
  69                 return -ENOMEM;
  70
  71         (void)smart_enable(drive);
  72
  73         if (get_smart_data(drive, buf, sub_cmd) == 0) {
  74                 __le16 *val = (__le16 *)buf;
  75                 int i;
  76
  77                 for (i = 0; i < SECTOR_SIZE / 2; i++) {
  78                         seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
  79                                         (i % 8) == 7 ? '\n' : ' ');
  80                 }
  81         }
  82         kfree(buf);
  83         return 0;
  84 }
  85
  86 static int idedisk_sv_proc_show(struct seq_file *m, void *v)
  87 {
  88         return __idedisk_proc_show(m, m->private, ATA_SMART_READ_VALUES);
  89 }
  90
  91 static int idedisk_st_proc_show(struct seq_file *m, void *v)
  92 {
  93         return __idedisk_proc_show(m, m->private, ATA_SMART_READ_THRESHOLDS);
  94 }
  95
  96 ide_proc_entry_t ide_disk_proc[] = {
  97         { "cache",        S_IFREG|S_IRUGO, idedisk_cache_proc_show      },
  98         { "capacity",     S_IFREG|S_IRUGO, idedisk_capacity_proc_show   },
  99         { "geometry",     S_IFREG|S_IRUGO, ide_geometry_proc_show       },
 100         { "smart_values", S_IFREG|S_IRUSR, idedisk_sv_proc_show         },
 101         { "smart_thresholds", S_IFREG|S_IRUSR, idedisk_st_proc_show     },
 102         {}
 103 };
 104
 105 ide_devset_rw_field(bios_cyl, bios_cyl);
 106 ide_devset_rw_field(bios_head, bios_head);
 107 ide_devset_rw_field(bios_sect, bios_sect);
 108 ide_devset_rw_field(failures, failures);
 109 ide_devset_rw_field(lun, lun);
 110 ide_devset_rw_field(max_failures, max_failures);
 111
 112 const struct ide_proc_devset ide_disk_settings[] = {
 113         IDE_PROC_DEVSET(acoustic,       0,   254),
 114         IDE_PROC_DEVSET(address,        0,     2),
 115         IDE_PROC_DEVSET(bios_cyl,       0, 65535),
 116         IDE_PROC_DEVSET(bios_head,      0,   255),
 117         IDE_PROC_DEVSET(bios_sect,      0,    63),
 118         IDE_PROC_DEVSET(failures,       0, 65535),
 119         IDE_PROC_DEVSET(lun,            0,     7),
 120         IDE_PROC_DEVSET(max_failures,   0, 65535),
 121         IDE_PROC_DEVSET(multcount,      0,    16),
 122         IDE_PROC_DEVSET(nowerr,         0,     1),
 123         IDE_PROC_DEVSET(wcache,         0,     1),
 124         { NULL },
 125 };