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
 10static 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
 26static 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
 44static 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
 55static 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
 63static 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
 86static 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
 91static 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
 96ide_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
105ide_devset_rw_field(bios_cyl, bios_cyl);
106ide_devset_rw_field(bios_head, bios_head);
107ide_devset_rw_field(bios_sect, bios_sect);
108ide_devset_rw_field(failures, failures);
109ide_devset_rw_field(lun, lun);
110ide_devset_rw_field(max_failures, max_failures);
111
112const 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};