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};
126