ide-disk_proc.c

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#include <linux/kernel.h>
#include <linux/ide.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/seq_file.h>

#include "ide-disk.h"

static int smart_enable(ide_drive_t *drive)
{
    struct ide_cmd cmd;
    struct ide_taskfile *tf = &cmd.tf;

    memset(&cmd, 0, sizeof(cmd));
    tf->feature = ATA_SMART_ENABLE;
    tf->lbam    = ATA_SMART_LBAM_PASS;
    tf->lbah    = ATA_SMART_LBAH_PASS;
    tf->command = ATA_CMD_SMART;
    cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
    cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;

    return ide_no_data_taskfile(drive, &cmd);
}

static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
{
    struct ide_cmd cmd;
    struct ide_taskfile *tf = &cmd.tf;

    memset(&cmd, 0, sizeof(cmd));
    tf->feature = sub_cmd;
    tf->nsect   = 0x01;
    tf->lbam    = ATA_SMART_LBAM_PASS;
    tf->lbah    = ATA_SMART_LBAH_PASS;
    tf->command = ATA_CMD_SMART;
    cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
    cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
    cmd.protocol = ATA_PROT_PIO;

    return ide_raw_taskfile(drive, &cmd, buf, 1);
}

static int idedisk_cache_proc_show(struct seq_file *m, void *v)
{
    ide_drive_t *drive = (ide_drive_t *) m->private;

    if (drive->dev_flags & IDE_DFLAG_ID_READ)
        seq_printf(m, "%i\n", drive->id[ATA_ID_BUF_SIZE] / 2);
    else
        seq_printf(m, "(none)\n");
    return 0;
}

static int idedisk_cache_proc_open(struct inode *inode, struct file *file)
{
    return single_open(file, idedisk_cache_proc_show, PDE(inode)->data);
}

static const struct file_operations idedisk_cache_proc_fops = {
    .owner      = THIS_MODULE,
    .open       = idedisk_cache_proc_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = single_release,
};

static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
{
    ide_drive_t*drive = (ide_drive_t *)m->private;

    seq_printf(m, "%llu\n", (long long)ide_gd_capacity(drive));
    return 0;
}

static int idedisk_capacity_proc_open(struct inode *inode, struct file *file)
{
    return single_open(file, idedisk_capacity_proc_show, PDE(inode)->data);
}

static const struct file_operations idedisk_capacity_proc_fops = {
    .owner      = THIS_MODULE,
    .open       = idedisk_capacity_proc_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = single_release,
};

static int __idedisk_proc_show(struct seq_file *m, ide_drive_t *drive, u8 sub_cmd)
{
    u8 *buf;

    buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
    if (!buf)
        return -ENOMEM;

    (void)smart_enable(drive);

    if (get_smart_data(drive, buf, sub_cmd) == 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' : ' ');
        }
    }
    kfree(buf);
    return 0;
}

static int idedisk_sv_proc_show(struct seq_file *m, void *v)
{
    return __idedisk_proc_show(m, m->private, ATA_SMART_READ_VALUES);
}

static int idedisk_sv_proc_open(struct inode *inode, struct file *file)
{
    return single_open(file, idedisk_sv_proc_show, PDE(inode)->data);
}

static const struct file_operations idedisk_sv_proc_fops = {
    .owner      = THIS_MODULE,
    .open       = idedisk_sv_proc_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = single_release,
};

static int idedisk_st_proc_show(struct seq_file *m, void *v)
{
    return __idedisk_proc_show(m, m->private, ATA_SMART_READ_THRESHOLDS);
}

static int idedisk_st_proc_open(struct inode *inode, struct file *file)
{
    return single_open(file, idedisk_st_proc_show, PDE(inode)->data);
}

static const struct file_operations idedisk_st_proc_fops = {
    .owner      = THIS_MODULE,
    .open       = idedisk_st_proc_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = single_release,
};

ide_proc_entry_t ide_disk_proc[] = {
    { "cache",    S_IFREG|S_IRUGO, &idedisk_cache_proc_fops },
    { "capacity",     S_IFREG|S_IRUGO, &idedisk_capacity_proc_fops  },
    { "geometry",     S_IFREG|S_IRUGO, &ide_geometry_proc_fops  },
    { "smart_values", S_IFREG|S_IRUSR, &idedisk_sv_proc_fops    },
    { "smart_thresholds", S_IFREG|S_IRUSR, &idedisk_st_proc_fops    },
    {}
};

ide_devset_rw_field(bios_cyl, bios_cyl);
ide_devset_rw_field(bios_head, bios_head);
ide_devset_rw_field(bios_sect, bios_sect);
ide_devset_rw_field(failures, failures);
ide_devset_rw_field(lun, lun);
ide_devset_rw_field(max_failures, max_failures);

const struct ide_proc_devset ide_disk_settings[] = {
    IDE_PROC_DEVSET(acoustic,   0,   254),
    IDE_PROC_DEVSET(address,    0,     2),
    IDE_PROC_DEVSET(bios_cyl,   0, 65535),
    IDE_PROC_DEVSET(bios_head,  0,   255),
    IDE_PROC_DEVSET(bios_sect,  0,    63),
    IDE_PROC_DEVSET(failures,   0, 65535),
    IDE_PROC_DEVSET(lun,        0,     7),
    IDE_PROC_DEVSET(max_failures,   0, 65535),
    IDE_PROC_DEVSET(multcount,  0,    16),
    IDE_PROC_DEVSET(nowerr,     0,     1),
    IDE_PROC_DEVSET(wcache,     0,     1),
    { NULL },
};