267 lines
7.1 KiB
C
267 lines
7.1 KiB
C
|
/*
|
||
|
* Copyright 2011 Tilera Corporation. All Rights Reserved.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU General Public License
|
||
|
* as published by the Free Software Foundation, version 2.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful, but
|
||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
||
|
* NON INFRINGEMENT. See the GNU General Public License for
|
||
|
* more details.
|
||
|
*
|
||
|
* /sys entry support.
|
||
|
*/
|
||
|
|
||
|
#include <linux/device.h>
|
||
|
#include <linux/cpu.h>
|
||
|
#include <linux/slab.h>
|
||
|
#include <linux/smp.h>
|
||
|
#include <linux/stat.h>
|
||
|
#include <hv/hypervisor.h>
|
||
|
|
||
|
/* Return a string queried from the hypervisor, truncated to page size. */
|
||
|
static ssize_t get_hv_confstr(char *page, int query)
|
||
|
{
|
||
|
ssize_t n = hv_confstr(query, (unsigned long)page, PAGE_SIZE - 1);
|
||
|
n = n < 0 ? 0 : min(n, (ssize_t)PAGE_SIZE - 1) - 1;
|
||
|
if (n)
|
||
|
page[n++] = '\n';
|
||
|
page[n] = '\0';
|
||
|
return n;
|
||
|
}
|
||
|
|
||
|
static ssize_t chip_width_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
return sprintf(page, "%u\n", smp_width);
|
||
|
}
|
||
|
static DEVICE_ATTR(chip_width, 0444, chip_width_show, NULL);
|
||
|
|
||
|
static ssize_t chip_height_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
return sprintf(page, "%u\n", smp_height);
|
||
|
}
|
||
|
static DEVICE_ATTR(chip_height, 0444, chip_height_show, NULL);
|
||
|
|
||
|
static ssize_t chip_serial_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
return get_hv_confstr(page, HV_CONFSTR_CHIP_SERIAL_NUM);
|
||
|
}
|
||
|
static DEVICE_ATTR(chip_serial, 0444, chip_serial_show, NULL);
|
||
|
|
||
|
static ssize_t chip_revision_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
return get_hv_confstr(page, HV_CONFSTR_CHIP_REV);
|
||
|
}
|
||
|
static DEVICE_ATTR(chip_revision, 0444, chip_revision_show, NULL);
|
||
|
|
||
|
|
||
|
static ssize_t type_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
return sprintf(page, "tilera\n");
|
||
|
}
|
||
|
static DEVICE_ATTR(type, 0444, type_show, NULL);
|
||
|
|
||
|
#define HV_CONF_ATTR(name, conf) \
|
||
|
static ssize_t name ## _show(struct device *dev, \
|
||
|
struct device_attribute *attr, \
|
||
|
char *page) \
|
||
|
{ \
|
||
|
return get_hv_confstr(page, conf); \
|
||
|
} \
|
||
|
static DEVICE_ATTR(name, 0444, name ## _show, NULL);
|
||
|
|
||
|
HV_CONF_ATTR(version, HV_CONFSTR_HV_SW_VER)
|
||
|
HV_CONF_ATTR(config_version, HV_CONFSTR_HV_CONFIG_VER)
|
||
|
|
||
|
HV_CONF_ATTR(board_part, HV_CONFSTR_BOARD_PART_NUM)
|
||
|
HV_CONF_ATTR(board_serial, HV_CONFSTR_BOARD_SERIAL_NUM)
|
||
|
HV_CONF_ATTR(board_revision, HV_CONFSTR_BOARD_REV)
|
||
|
HV_CONF_ATTR(board_description, HV_CONFSTR_BOARD_DESC)
|
||
|
HV_CONF_ATTR(mezz_part, HV_CONFSTR_MEZZ_PART_NUM)
|
||
|
HV_CONF_ATTR(mezz_serial, HV_CONFSTR_MEZZ_SERIAL_NUM)
|
||
|
HV_CONF_ATTR(mezz_revision, HV_CONFSTR_MEZZ_REV)
|
||
|
HV_CONF_ATTR(mezz_description, HV_CONFSTR_MEZZ_DESC)
|
||
|
HV_CONF_ATTR(cpumod_part, HV_CONFSTR_CPUMOD_PART_NUM)
|
||
|
HV_CONF_ATTR(cpumod_serial, HV_CONFSTR_CPUMOD_SERIAL_NUM)
|
||
|
HV_CONF_ATTR(cpumod_revision, HV_CONFSTR_CPUMOD_REV)
|
||
|
HV_CONF_ATTR(cpumod_description,HV_CONFSTR_CPUMOD_DESC)
|
||
|
HV_CONF_ATTR(switch_control, HV_CONFSTR_SWITCH_CONTROL)
|
||
|
|
||
|
static struct attribute *board_attrs[] = {
|
||
|
&dev_attr_board_part.attr,
|
||
|
&dev_attr_board_serial.attr,
|
||
|
&dev_attr_board_revision.attr,
|
||
|
&dev_attr_board_description.attr,
|
||
|
&dev_attr_mezz_part.attr,
|
||
|
&dev_attr_mezz_serial.attr,
|
||
|
&dev_attr_mezz_revision.attr,
|
||
|
&dev_attr_mezz_description.attr,
|
||
|
&dev_attr_cpumod_part.attr,
|
||
|
&dev_attr_cpumod_serial.attr,
|
||
|
&dev_attr_cpumod_revision.attr,
|
||
|
&dev_attr_cpumod_description.attr,
|
||
|
&dev_attr_switch_control.attr,
|
||
|
NULL
|
||
|
};
|
||
|
|
||
|
static struct attribute_group board_attr_group = {
|
||
|
.name = "board",
|
||
|
.attrs = board_attrs,
|
||
|
};
|
||
|
|
||
|
|
||
|
static struct bin_attribute hvconfig_bin;
|
||
|
|
||
|
static ssize_t
|
||
|
hvconfig_bin_read(struct file *filp, struct kobject *kobj,
|
||
|
struct bin_attribute *bin_attr,
|
||
|
char *buf, loff_t off, size_t count)
|
||
|
{
|
||
|
static size_t size;
|
||
|
|
||
|
/* Lazily learn the true size (minus the trailing NUL). */
|
||
|
if (size == 0)
|
||
|
size = hv_confstr(HV_CONFSTR_HV_CONFIG, 0, 0) - 1;
|
||
|
|
||
|
/* Check and adjust input parameters. */
|
||
|
if (off > size)
|
||
|
return -EINVAL;
|
||
|
if (count > size - off)
|
||
|
count = size - off;
|
||
|
|
||
|
if (count) {
|
||
|
/* Get a copy of the hvc and copy out the relevant portion. */
|
||
|
char *hvc;
|
||
|
|
||
|
size = off + count;
|
||
|
hvc = kmalloc(size, GFP_KERNEL);
|
||
|
if (hvc == NULL)
|
||
|
return -ENOMEM;
|
||
|
hv_confstr(HV_CONFSTR_HV_CONFIG, (unsigned long)hvc, size);
|
||
|
memcpy(buf, hvc + off, count);
|
||
|
kfree(hvc);
|
||
|
}
|
||
|
|
||
|
return count;
|
||
|
}
|
||
|
|
||
|
static ssize_t hv_stats_show(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
char *page)
|
||
|
{
|
||
|
int cpu = dev->id;
|
||
|
long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
|
||
|
|
||
|
ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS,
|
||
|
(unsigned long)page, PAGE_SIZE - 1,
|
||
|
lotar, 0);
|
||
|
n = n < 0 ? 0 : min(n, (ssize_t)PAGE_SIZE - 1);
|
||
|
page[n] = '\0';
|
||
|
return n;
|
||
|
}
|
||
|
|
||
|
static ssize_t hv_stats_store(struct device *dev,
|
||
|
struct device_attribute *attr,
|
||
|
const char *page,
|
||
|
size_t count)
|
||
|
{
|
||
|
int cpu = dev->id;
|
||
|
long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
|
||
|
|
||
|
ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS, 0, 0, lotar, 1);
|
||
|
return n < 0 ? n : count;
|
||
|
}
|
||
|
|
||
|
static DEVICE_ATTR(hv_stats, 0644, hv_stats_show, hv_stats_store);
|
||
|
|
||
|
static int hv_stats_device_add(struct device *dev, struct subsys_interface *sif)
|
||
|
{
|
||
|
int err, cpu = dev->id;
|
||
|
|
||
|
if (!cpu_online(cpu))
|
||
|
return 0;
|
||
|
|
||
|
err = sysfs_create_file(&dev->kobj, &dev_attr_hv_stats.attr);
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static void hv_stats_device_remove(struct device *dev,
|
||
|
struct subsys_interface *sif)
|
||
|
{
|
||
|
int cpu = dev->id;
|
||
|
|
||
|
if (cpu_online(cpu))
|
||
|
sysfs_remove_file(&dev->kobj, &dev_attr_hv_stats.attr);
|
||
|
}
|
||
|
|
||
|
|
||
|
static struct subsys_interface hv_stats_interface = {
|
||
|
.name = "hv_stats",
|
||
|
.subsys = &cpu_subsys,
|
||
|
.add_dev = hv_stats_device_add,
|
||
|
.remove_dev = hv_stats_device_remove,
|
||
|
};
|
||
|
|
||
|
static int __init create_sysfs_entries(void)
|
||
|
{
|
||
|
int err = 0;
|
||
|
|
||
|
#define create_cpu_attr(name) \
|
||
|
if (!err) \
|
||
|
err = device_create_file(cpu_subsys.dev_root, &dev_attr_##name);
|
||
|
create_cpu_attr(chip_width);
|
||
|
create_cpu_attr(chip_height);
|
||
|
create_cpu_attr(chip_serial);
|
||
|
create_cpu_attr(chip_revision);
|
||
|
|
||
|
#define create_hv_attr(name) \
|
||
|
if (!err) \
|
||
|
err = sysfs_create_file(hypervisor_kobj, &dev_attr_##name.attr);
|
||
|
create_hv_attr(type);
|
||
|
create_hv_attr(version);
|
||
|
create_hv_attr(config_version);
|
||
|
|
||
|
if (!err)
|
||
|
err = sysfs_create_group(hypervisor_kobj, &board_attr_group);
|
||
|
|
||
|
if (!err) {
|
||
|
sysfs_bin_attr_init(&hvconfig_bin);
|
||
|
hvconfig_bin.attr.name = "hvconfig";
|
||
|
hvconfig_bin.attr.mode = S_IRUGO;
|
||
|
hvconfig_bin.read = hvconfig_bin_read;
|
||
|
hvconfig_bin.size = PAGE_SIZE;
|
||
|
err = sysfs_create_bin_file(hypervisor_kobj, &hvconfig_bin);
|
||
|
}
|
||
|
|
||
|
if (!err) {
|
||
|
/*
|
||
|
* Don't bother adding the hv_stats files on each CPU if
|
||
|
* our hypervisor doesn't supply statistics.
|
||
|
*/
|
||
|
int cpu = raw_smp_processor_id();
|
||
|
long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
|
||
|
char dummy;
|
||
|
ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS,
|
||
|
(unsigned long) &dummy, 1,
|
||
|
lotar, 0);
|
||
|
if (n >= 0)
|
||
|
err = subsys_interface_register(&hv_stats_interface);
|
||
|
}
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
subsys_initcall(create_sysfs_entries);
|