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i7300_idle driver v1.55

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The Intel 7300 Memory Controller supports dynamic throttling of memory which can
be used to save power when system is idle. This driver does the memory
throttling when all CPUs are idle on such a system.

Refer to "Intel 7300 Memory Controller Hub (MCH)" datasheet
for the config space description.

Signed-off-by: Andy Henroid <andrew.d.henroid@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
This commit is contained in:
Andy Henroid
2008-10-09 11:45:22 -07:00
committed by Len Brown
parent c7d87d79d1
commit 27471fdb32
9 changed files with 706 additions and 0 deletions
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MAINTAINERS
+6
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@@ -2078,6 +2078,12 @@ L: linux-ide@vger.kernel.org
L: linux-scsi@vger.kernel.org
S: Orphan
IDLE-I7300
P: Andy Henroid
M: andrew.d.henroid@intel.com
L: linux-pm@lists.linux-foundation.org
S: Supported
IEEE 1394 SUBSYSTEM (drivers/ieee1394)
P: Ben Collins
M: ben.collins@ubuntu.com
arch/x86/Kconfig
+2
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@@ -1536,6 +1536,8 @@ source "arch/x86/kernel/cpu/cpufreq/Kconfig"
source "drivers/cpuidle/Kconfig"
source "drivers/idle/Kconfig"
endmenu
drivers/Makefile
+1
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@@ -82,6 +82,7 @@ obj-$(CONFIG_EISA) += eisa/
obj-y += lguest/
obj-$(CONFIG_CPU_FREQ) += cpufreq/
obj-$(CONFIG_CPU_IDLE) += cpuidle/
obj-y += idle/
obj-$(CONFIG_MMC) += mmc/
obj-$(CONFIG_MEMSTICK) += memstick/
obj-$(CONFIG_NEW_LEDS) += leds/
drivers/dma/ioat_dma.c
+3
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@@ -171,6 +171,9 @@ static int ioat_dma_enumerate_channels(struct ioatdma_device *device)
xfercap_scale = readb(device->reg_base + IOAT_XFERCAP_OFFSET);
xfercap = (xfercap_scale == 0 ? -1 : (1UL << xfercap_scale));
#if CONFIG_I7300_IDLE_IOAT_CHANNEL
device->common.chancnt--;
#endif
for (i = 0; i < device->common.chancnt; i++) {
ioat_chan = kzalloc(sizeof(*ioat_chan), GFP_KERNEL);
if (!ioat_chan) {
drivers/idle/Kconfig
+16
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@@ -0,0 +1,16 @@
menu "Memory power savings"
config I7300_IDLE_IOAT_CHANNEL
bool
config I7300_IDLE
tristate "Intel chipset idle power saving driver"
select I7300_IDLE_IOAT_CHANNEL
depends on X86_64
help
Enable idle power savings with certain Intel server chipsets.
The chipset must have I/O AT support, such as the Intel 7300.
The power savings depends on the type and quantity of DRAM devices.
endmenu
drivers/idle/Makefile
+2
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@@ -0,0 +1,2 @@
obj-$(CONFIG_I7300_IDLE) += i7300_idle.o
drivers/idle/i7300_idle.c
+674
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File diff suppressed because it is too large Load Diff
include/asm-x86/idle.h
+1
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@@ -6,6 +6,7 @@
struct notifier_block;
void idle_notifier_register(struct notifier_block *n);
void idle_notifier_unregister(struct notifier_block *n);
void enter_idle(void);
void exit_idle(void);
include/linux/pci_ids.h
+1
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@@ -2422,6 +2422,7 @@
#define PCI_DEVICE_ID_INTEL_MCH_PC1 0x359a
#define PCI_DEVICE_ID_INTEL_E7525_MCH 0x359e
#define PCI_DEVICE_ID_INTEL_IOAT_CNB 0x360b
#define PCI_DEVICE_ID_INTEL_FBD_CNB 0x360c
#define PCI_DEVICE_ID_INTEL_ICH10_0 0x3a14
#define PCI_DEVICE_ID_INTEL_ICH10_1 0x3a16
#define PCI_DEVICE_ID_INTEL_ICH10_2 0x3a18