2 * Copyright 2011 Tilera Corporation. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
17 #include <linux/sysdev.h>
18 #include <linux/cpu.h>
19 #include <linux/slab.h>
20 #include <linux/smp.h>
21 #include <hv/hypervisor.h>
23 /* Return a string queried from the hypervisor, truncated to page size. */
24 static ssize_t
get_hv_confstr(char *page
, int query
)
26 ssize_t n
= hv_confstr(query
, (unsigned long)page
, PAGE_SIZE
- 1);
27 n
= n
< 0 ? 0 : min(n
, (ssize_t
)PAGE_SIZE
- 1) - 1;
34 static ssize_t
chip_width_show(struct sysdev_class
*dev
,
35 struct sysdev_class_attribute
*attr
,
38 return sprintf(page
, "%u\n", smp_width
);
40 static SYSDEV_CLASS_ATTR(chip_width
, 0444, chip_width_show
, NULL
);
42 static ssize_t
chip_height_show(struct sysdev_class
*dev
,
43 struct sysdev_class_attribute
*attr
,
46 return sprintf(page
, "%u\n", smp_height
);
48 static SYSDEV_CLASS_ATTR(chip_height
, 0444, chip_height_show
, NULL
);
50 static ssize_t
chip_serial_show(struct sysdev_class
*dev
,
51 struct sysdev_class_attribute
*attr
,
54 return get_hv_confstr(page
, HV_CONFSTR_CHIP_SERIAL_NUM
);
56 static SYSDEV_CLASS_ATTR(chip_serial
, 0444, chip_serial_show
, NULL
);
58 static ssize_t
chip_revision_show(struct sysdev_class
*dev
,
59 struct sysdev_class_attribute
*attr
,
62 return get_hv_confstr(page
, HV_CONFSTR_CHIP_REV
);
64 static SYSDEV_CLASS_ATTR(chip_revision
, 0444, chip_revision_show
, NULL
);
67 static ssize_t
type_show(struct sysdev_class
*dev
,
68 struct sysdev_class_attribute
*attr
,
71 return sprintf(page
, "tilera\n");
73 static SYSDEV_CLASS_ATTR(type
, 0444, type_show
, NULL
);
75 #define HV_CONF_ATTR(name, conf) \
76 static ssize_t name ## _show(struct sysdev_class *dev, \
77 struct sysdev_class_attribute *attr, \
80 return get_hv_confstr(page, conf); \
82 static SYSDEV_CLASS_ATTR(name, 0444, name ## _show, NULL);
84 HV_CONF_ATTR(version
, HV_CONFSTR_HV_SW_VER
)
85 HV_CONF_ATTR(config_version
, HV_CONFSTR_HV_CONFIG_VER
)
87 HV_CONF_ATTR(board_part
, HV_CONFSTR_BOARD_PART_NUM
)
88 HV_CONF_ATTR(board_serial
, HV_CONFSTR_BOARD_SERIAL_NUM
)
89 HV_CONF_ATTR(board_revision
, HV_CONFSTR_BOARD_REV
)
90 HV_CONF_ATTR(board_description
, HV_CONFSTR_BOARD_DESC
)
91 HV_CONF_ATTR(mezz_part
, HV_CONFSTR_MEZZ_PART_NUM
)
92 HV_CONF_ATTR(mezz_serial
, HV_CONFSTR_MEZZ_SERIAL_NUM
)
93 HV_CONF_ATTR(mezz_revision
, HV_CONFSTR_MEZZ_REV
)
94 HV_CONF_ATTR(mezz_description
, HV_CONFSTR_MEZZ_DESC
)
95 HV_CONF_ATTR(switch_control
, HV_CONFSTR_SWITCH_CONTROL
)
97 static struct attribute
*board_attrs
[] = {
98 &attr_board_part
.attr
,
99 &attr_board_serial
.attr
,
100 &attr_board_revision
.attr
,
101 &attr_board_description
.attr
,
102 &attr_mezz_part
.attr
,
103 &attr_mezz_serial
.attr
,
104 &attr_mezz_revision
.attr
,
105 &attr_mezz_description
.attr
,
106 &attr_switch_control
.attr
,
110 static struct attribute_group board_attr_group
= {
112 .attrs
= board_attrs
,
116 static struct bin_attribute hvconfig_bin
;
119 hvconfig_bin_read(struct file
*filp
, struct kobject
*kobj
,
120 struct bin_attribute
*bin_attr
,
121 char *buf
, loff_t off
, size_t count
)
125 /* Lazily learn the true size (minus the trailing NUL). */
127 size
= hv_confstr(HV_CONFSTR_HV_CONFIG
, 0, 0) - 1;
129 /* Check and adjust input parameters. */
132 if (count
> size
- off
)
136 /* Get a copy of the hvc and copy out the relevant portion. */
140 hvc
= kmalloc(size
, GFP_KERNEL
);
143 hv_confstr(HV_CONFSTR_HV_CONFIG
, (unsigned long)hvc
, size
);
144 memcpy(buf
, hvc
+ off
, count
);
151 static int __init
create_sysfs_entries(void)
153 struct sysdev_class
*cls
= &cpu_sysdev_class
;
156 #define create_cpu_attr(name) \
158 err = sysfs_create_file(&cls->kset.kobj, &attr_##name.attr);
159 create_cpu_attr(chip_width
);
160 create_cpu_attr(chip_height
);
161 create_cpu_attr(chip_serial
);
162 create_cpu_attr(chip_revision
);
164 #define create_hv_attr(name) \
166 err = sysfs_create_file(hypervisor_kobj, &attr_##name.attr);
167 create_hv_attr(type
);
168 create_hv_attr(version
);
169 create_hv_attr(config_version
);
172 err
= sysfs_create_group(hypervisor_kobj
, &board_attr_group
);
175 sysfs_bin_attr_init(&hvconfig_bin
);
176 hvconfig_bin
.attr
.name
= "hvconfig";
177 hvconfig_bin
.attr
.mode
= S_IRUGO
;
178 hvconfig_bin
.read
= hvconfig_bin_read
;
179 hvconfig_bin
.size
= PAGE_SIZE
;
180 err
= sysfs_create_bin_file(hypervisor_kobj
, &hvconfig_bin
);
185 subsys_initcall(create_sysfs_entries
);