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_cache_proc_open(struct inode *inode, struct file *file)
  56 {
  57         return single_open(file, idedisk_cache_proc_show, PDE_DATA(inode));
  58 }
  59
  60 static const struct file_operations idedisk_cache_proc_fops = {
  61         .owner          = THIS_MODULE,
  62         .open           = idedisk_cache_proc_open,
  63         .read           = seq_read,
  64         .llseek         = seq_lseek,
  65         .release        = single_release,
  66 };
  67
  68 static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
  69 {
  70         ide_drive_t*drive = (ide_drive_t *)m->private;
  71
  72         seq_printf(m, "%llu\n", (long long)ide_gd_capacity(drive));
  73         return 0;
  74 }
  75
  76 static int idedisk_capacity_proc_open(struct inode *inode, struct file *file)
  77 {
  78         return single_open(file, idedisk_capacity_proc_show, PDE_DATA(inode));
  79 }
  80
  81 static const struct file_operations idedisk_capacity_proc_fops = {
  82         .owner          = THIS_MODULE,
  83         .open           = idedisk_capacity_proc_open,
  84         .read           = seq_read,
  85         .llseek         = seq_lseek,
  86         .release        = single_release,
  87 };
  88
  89 static int __idedisk_proc_show(struct seq_file *m, ide_drive_t *drive, u8 sub_cmd)
  90 {
  91         u8 *buf;
  92
  93         buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
  94         if (!buf)
  95                 return -ENOMEM;
  96
  97         (void)smart_enable(drive);
  98
  99         if (get_smart_data(drive, buf, sub_cmd) == 0) {
 100                 __le16 *val = (__le16 *)buf;
 101                 int i;
 102
 103                 for (i = 0; i < SECTOR_SIZE / 2; i++) {
 104                         seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
 105                                         (i % 8) == 7 ? '\n' : ' ');
 106                 }
 107         }
 108         kfree(buf);
 109         return 0;
 110 }
 111
 112 static int idedisk_sv_proc_show(struct seq_file *m, void *v)
 113 {
 114         return __idedisk_proc_show(m, m->private, ATA_SMART_READ_VALUES);
 115 }
 116
 117 static int idedisk_sv_proc_open(struct inode *inode, struct file *file)
 118 {
 119         return single_open(file, idedisk_sv_proc_show, PDE_DATA(inode));
 120 }
 121
 122 static const struct file_operations idedisk_sv_proc_fops = {
 123         .owner          = THIS_MODULE,
 124         .open           = idedisk_sv_proc_open,
 125         .read           = seq_read,
 126         .llseek         = seq_lseek,
 127         .release        = single_release,
 128 };
 129
 130 static int idedisk_st_proc_show(struct seq_file *m, void *v)
 131 {
 132         return __idedisk_proc_show(m, m->private, ATA_SMART_READ_THRESHOLDS);
 133 }
 134
 135 static int idedisk_st_proc_open(struct inode *inode, struct file *file)
 136 {
 137         return single_open(file, idedisk_st_proc_show, PDE_DATA(inode));
 138 }
 139
 140 static const struct file_operations idedisk_st_proc_fops = {
 141         .owner          = THIS_MODULE,
 142         .open           = idedisk_st_proc_open,
 143         .read           = seq_read,
 144         .llseek         = seq_lseek,
 145         .release        = single_release,
 146 };
 147
 148 ide_proc_entry_t ide_disk_proc[] = {
 149         { "cache",        S_IFREG|S_IRUGO, &idedisk_cache_proc_fops     },
 150         { "capacity",     S_IFREG|S_IRUGO, &idedisk_capacity_proc_fops  },
 151         { "geometry",     S_IFREG|S_IRUGO, &ide_geometry_proc_fops      },
 152         { "smart_values", S_IFREG|S_IRUSR, &idedisk_sv_proc_fops        },
 153         { "smart_thresholds", S_IFREG|S_IRUSR, &idedisk_st_proc_fops    },
 154         {}
 155 };
 156
 157 ide_devset_rw_field(bios_cyl, bios_cyl);
 158 ide_devset_rw_field(bios_head, bios_head);
 159 ide_devset_rw_field(bios_sect, bios_sect);
 160 ide_devset_rw_field(failures, failures);
 161 ide_devset_rw_field(lun, lun);
 162 ide_devset_rw_field(max_failures, max_failures);
 163
 164 const struct ide_proc_devset ide_disk_settings[] = {
 165         IDE_PROC_DEVSET(acoustic,       0,   254),
 166         IDE_PROC_DEVSET(address,        0,     2),
 167         IDE_PROC_DEVSET(bios_cyl,       0, 65535),
 168         IDE_PROC_DEVSET(bios_head,      0,   255),
 169         IDE_PROC_DEVSET(bios_sect,      0,    63),
 170         IDE_PROC_DEVSET(failures,       0, 65535),
 171         IDE_PROC_DEVSET(lun,            0,     7),
 172         IDE_PROC_DEVSET(max_failures,   0, 65535),
 173         IDE_PROC_DEVSET(multcount,      0,    16),
 174         IDE_PROC_DEVSET(nowerr,         0,     1),
 175         IDE_PROC_DEVSET(wcache,         0,     1),
 176         { NULL },
 177 };