mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 10:57:46 +00:00
[POWERPC] cell: add temperature to SPU and CPU sysfs entries
This patch adds a module that registers sysfs attributes to CPU and SPU containing the temperature of the CBE. They can be found under /sys/devices/system/spu/cpuX/thermal/temperature[0|1] /sys/devices/system/spu/spuX/thermal/temperature The temperature is read from the on-chip temperature sensors. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
parent
0344c6c538
commit
b3d7dc1967
4 changed files with 233 additions and 0 deletions
|
@ -149,6 +149,7 @@ CONFIG_MMIO_NVRAM=y
|
|||
CONFIG_SPU_FS=m
|
||||
CONFIG_SPU_BASE=y
|
||||
CONFIG_CBE_RAS=y
|
||||
CONFIG_CBE_THERM=m
|
||||
|
||||
#
|
||||
# Kernel options
|
||||
|
|
|
@ -20,4 +20,9 @@ config CBE_RAS
|
|||
bool "RAS features for bare metal Cell BE"
|
||||
default y
|
||||
|
||||
config CBE_THERM
|
||||
tristate "CBE thermal support"
|
||||
default m
|
||||
depends on CBE_RAS
|
||||
|
||||
endmenu
|
||||
|
|
|
@ -3,6 +3,8 @@ obj-$(CONFIG_PPC_CELL_NATIVE) += interrupt.o iommu.o setup.o \
|
|||
pmu.o
|
||||
obj-$(CONFIG_CBE_RAS) += ras.o
|
||||
|
||||
obj-$(CONFIG_CBE_THERM) += cbe_thermal.o
|
||||
|
||||
ifeq ($(CONFIG_SMP),y)
|
||||
obj-$(CONFIG_PPC_CELL_NATIVE) += smp.o
|
||||
endif
|
||||
|
|
225
arch/powerpc/platforms/cell/cbe_thermal.c
Normal file
225
arch/powerpc/platforms/cell/cbe_thermal.c
Normal file
|
@ -0,0 +1,225 @@
|
|||
/*
|
||||
* thermal support for the cell processor
|
||||
*
|
||||
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
|
||||
*
|
||||
* Author: Christian Krafft <krafft@de.ibm.com>
|
||||
*
|
||||
* 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; either version 2, or (at your option)
|
||||
* any later version.
|
||||
*
|
||||
* 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. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/sysdev.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/cpu.h>
|
||||
#include <asm/spu.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/prom.h>
|
||||
|
||||
#include "cbe_regs.h"
|
||||
|
||||
static struct cbe_pmd_regs __iomem *get_pmd_regs(struct sys_device *sysdev)
|
||||
{
|
||||
struct spu *spu;
|
||||
|
||||
spu = container_of(sysdev, struct spu, sysdev);
|
||||
|
||||
return cbe_get_pmd_regs(spu->devnode);
|
||||
}
|
||||
|
||||
/* returns the value for a given spu in a given register */
|
||||
static u8 spu_read_register_value(struct sys_device *sysdev, union spe_reg __iomem *reg)
|
||||
{
|
||||
unsigned int *id;
|
||||
union spe_reg value;
|
||||
struct spu *spu;
|
||||
|
||||
/* getting the id from the reg attribute will not work on future device-tree layouts
|
||||
* in future we should store the id to the spu struct and use it here */
|
||||
spu = container_of(sysdev, struct spu, sysdev);
|
||||
id = (unsigned int *)get_property(spu->devnode, "reg", NULL);
|
||||
value.val = in_be64(®->val);
|
||||
|
||||
return value.spe[*id];
|
||||
}
|
||||
|
||||
static ssize_t spu_show_temp(struct sys_device *sysdev, char *buf)
|
||||
{
|
||||
int value;
|
||||
struct cbe_pmd_regs __iomem *pmd_regs;
|
||||
|
||||
pmd_regs = get_pmd_regs(sysdev);
|
||||
|
||||
value = spu_read_register_value(sysdev, &pmd_regs->ts_ctsr1);
|
||||
/* clear all other bits */
|
||||
value &= 0x3F;
|
||||
/* temp is stored in steps of 2 degrees */
|
||||
value *= 2;
|
||||
/* base temp is 65 degrees */
|
||||
value += 65;
|
||||
|
||||
return sprintf(buf, "%d\n", (int) value);
|
||||
}
|
||||
|
||||
static ssize_t ppe_show_temp(struct sys_device *sysdev, char *buf, int pos)
|
||||
{
|
||||
struct cbe_pmd_regs __iomem *pmd_regs;
|
||||
u64 value;
|
||||
|
||||
pmd_regs = cbe_get_cpu_pmd_regs(sysdev->id);
|
||||
value = in_be64(&pmd_regs->ts_ctsr2);
|
||||
|
||||
/* access the corresponding byte */
|
||||
value >>= pos;
|
||||
/* clear all other bits */
|
||||
value &= 0x3F;
|
||||
/* temp is stored in steps of 2 degrees */
|
||||
value *= 2;
|
||||
/* base temp is 65 degrees */
|
||||
value += 65;
|
||||
|
||||
return sprintf(buf, "%d\n", (int) value);
|
||||
}
|
||||
|
||||
|
||||
/* shows the temperature of the DTS on the PPE,
|
||||
* located near the linear thermal sensor */
|
||||
static ssize_t ppe_show_temp0(struct sys_device *sysdev, char *buf)
|
||||
{
|
||||
return ppe_show_temp(sysdev, buf, 32);
|
||||
}
|
||||
|
||||
/* shows the temperature of the second DTS on the PPE */
|
||||
static ssize_t ppe_show_temp1(struct sys_device *sysdev, char *buf)
|
||||
{
|
||||
return ppe_show_temp(sysdev, buf, 0);
|
||||
}
|
||||
|
||||
static struct sysdev_attribute attr_spu_temperature = {
|
||||
.attr = {.name = "temperature", .mode = 0400 },
|
||||
.show = spu_show_temp,
|
||||
};
|
||||
|
||||
static struct attribute *spu_attributes[] = {
|
||||
&attr_spu_temperature.attr,
|
||||
};
|
||||
|
||||
static struct attribute_group spu_attribute_group = {
|
||||
.name = "thermal",
|
||||
.attrs = spu_attributes,
|
||||
};
|
||||
|
||||
static struct sysdev_attribute attr_ppe_temperature0 = {
|
||||
.attr = {.name = "temperature0", .mode = 0400 },
|
||||
.show = ppe_show_temp0,
|
||||
};
|
||||
|
||||
static struct sysdev_attribute attr_ppe_temperature1 = {
|
||||
.attr = {.name = "temperature1", .mode = 0400 },
|
||||
.show = ppe_show_temp1,
|
||||
};
|
||||
|
||||
static struct attribute *ppe_attributes[] = {
|
||||
&attr_ppe_temperature0.attr,
|
||||
&attr_ppe_temperature1.attr,
|
||||
};
|
||||
|
||||
static struct attribute_group ppe_attribute_group = {
|
||||
.name = "thermal",
|
||||
.attrs = ppe_attributes,
|
||||
};
|
||||
|
||||
/*
|
||||
* initialize throttling with default values
|
||||
*/
|
||||
static void __init init_default_values(void)
|
||||
{
|
||||
int cpu;
|
||||
struct cbe_pmd_regs __iomem *pmd_regs;
|
||||
struct sys_device *sysdev;
|
||||
union ppe_spe_reg tpr;
|
||||
union spe_reg str1;
|
||||
u64 str2;
|
||||
union spe_reg cr1;
|
||||
u64 cr2;
|
||||
|
||||
/* TPR defaults */
|
||||
/* ppe
|
||||
* 1F - no full stop
|
||||
* 08 - dynamic throttling starts if over 80 degrees
|
||||
* 03 - dynamic throttling ceases if below 70 degrees */
|
||||
tpr.ppe = 0x1F0803;
|
||||
/* spe
|
||||
* 10 - full stopped when over 96 degrees
|
||||
* 08 - dynamic throttling starts if over 80 degrees
|
||||
* 03 - dynamic throttling ceases if below 70 degrees
|
||||
*/
|
||||
tpr.spe = 0x100803;
|
||||
|
||||
/* STR defaults */
|
||||
/* str1
|
||||
* 10 - stop 16 of 32 cycles
|
||||
*/
|
||||
str1.val = 0x1010101010101010ull;
|
||||
/* str2
|
||||
* 10 - stop 16 of 32 cycles
|
||||
*/
|
||||
str2 = 0x10;
|
||||
|
||||
/* CR defaults */
|
||||
/* cr1
|
||||
* 4 - normal operation
|
||||
*/
|
||||
cr1.val = 0x0404040404040404ull;
|
||||
/* cr2
|
||||
* 4 - normal operation
|
||||
*/
|
||||
cr2 = 0x04;
|
||||
|
||||
for_each_possible_cpu (cpu) {
|
||||
pr_debug("processing cpu %d\n", cpu);
|
||||
sysdev = get_cpu_sysdev(cpu);
|
||||
pmd_regs = cbe_get_cpu_pmd_regs(sysdev->id);
|
||||
|
||||
out_be64(&pmd_regs->tm_str2, str2);
|
||||
out_be64(&pmd_regs->tm_str1.val, str1.val);
|
||||
out_be64(&pmd_regs->tm_tpr.val, tpr.val);
|
||||
out_be64(&pmd_regs->tm_cr1.val, cr1.val);
|
||||
out_be64(&pmd_regs->tm_cr2, cr2);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int __init thermal_init(void)
|
||||
{
|
||||
init_default_values();
|
||||
|
||||
spu_add_sysdev_attr_group(&spu_attribute_group);
|
||||
cpu_add_sysdev_attr_group(&ppe_attribute_group);
|
||||
|
||||
return 0;
|
||||
}
|
||||
module_init(thermal_init);
|
||||
|
||||
static void __exit thermal_exit(void)
|
||||
{
|
||||
spu_remove_sysdev_attr_group(&spu_attribute_group);
|
||||
cpu_remove_sysdev_attr_group(&ppe_attribute_group);
|
||||
}
|
||||
module_exit(thermal_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
|
||||
|
Loading…
Reference in a new issue