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_cache_proc_open(struct inode *inode, struct file *file)
 56{
 57	return single_open(file, idedisk_cache_proc_show, PDE_DATA(inode));
 58}
 59
 60static 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
 68static 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
 76static 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
 81static 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
 89static 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
112static 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
117static 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
122static 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
130static 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
135static 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
140static 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
148ide_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
157ide_devset_rw_field(bios_cyl, bios_cyl);
158ide_devset_rw_field(bios_head, bios_head);
159ide_devset_rw_field(bios_sect, bios_sect);
160ide_devset_rw_field(failures, failures);
161ide_devset_rw_field(lun, lun);
162ide_devset_rw_field(max_failures, max_failures);
163
164const 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};