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-rw-r--r--Documentation/ibm-acpi.txt75
-rw-r--r--arch/i386/kernel/acpi/cstate.c122
-rw-r--r--arch/i386/kernel/process.c22
-rw-r--r--arch/x86_64/kernel/process.c22
-rw-r--r--drivers/acpi/asus_acpi.c67
-rw-r--r--drivers/acpi/battery.c14
-rw-r--r--drivers/acpi/events/evrgnini.c13
-rw-r--r--drivers/acpi/ibm_acpi.c2
-rw-r--r--drivers/acpi/processor_idle.c101
-rw-r--r--drivers/acpi/sbs.c20
-rw-r--r--include/acpi/pdc_intel.h9
-rw-r--r--include/acpi/processor.h18
-rw-r--r--include/asm-i386/processor.h2
-rw-r--r--include/asm-x86_64/processor.h2
14 files changed, 337 insertions, 152 deletions
diff --git a/Documentation/ibm-acpi.txt b/Documentation/ibm-acpi.txt
index 71aa4034527..e50595bfd8e 100644
--- a/Documentation/ibm-acpi.txt
+++ b/Documentation/ibm-acpi.txt
@@ -30,9 +30,10 @@ detailed description):
- ACPI sounds
- temperature sensors
- Experimental: embedded controller register dump
- - Experimental: LCD brightness control
- - Experimental: volume control
+ - LCD brightness control
+ - Volume control
- Experimental: fan speed, fan enable/disable
+ - Experimental: WAN enable and disable
A compatibility table by model and feature is maintained on the web
site, http://ibm-acpi.sf.net/. I appreciate any success or failure
@@ -52,40 +53,7 @@ Installation
If you are compiling this driver as included in the Linux kernel
sources, simply enable the CONFIG_ACPI_IBM option (Power Management /
-ACPI / IBM ThinkPad Laptop Extras). The rest of this section describes
-how to install this driver when downloaded from the web site.
-
-First, you need to get a kernel with ACPI support up and running.
-Please refer to http://acpi.sourceforge.net/ for help with this
-step. How successful you will be depends a lot on you ThinkPad model,
-the kernel you are using and any additional patches applied. The
-kernel provided with your distribution may not be good enough. I
-needed to compile a 2.6.7 kernel with the 20040715 ACPI patch to get
-ACPI working reliably on my ThinkPad X40. Old ThinkPad models may not
-be supported at all.
-
-Assuming you have the basic ACPI support working (e.g. you can see the
-/proc/acpi directory), follow the following steps to install this
-driver:
-
- - unpack the archive:
-
- tar xzvf ibm-acpi-x.y.tar.gz; cd ibm-acpi-x.y
-
- - compile the driver:
-
- make
-
- - install the module in your kernel modules directory:
-
- make install
-
- - load the module:
-
- modprobe ibm_acpi
-
-After loading the module, check the "dmesg" output for any error messages.
-
+ACPI / IBM ThinkPad Laptop Extras).
Features
--------
@@ -523,13 +491,8 @@ registers contain the current battery capacity, etc. If you experiment
with this, do send me your results (including some complete dumps with
a description of the conditions when they were taken.)
-EXPERIMENTAL: LCD brightness control -- /proc/acpi/ibm/brightness
------------------------------------------------------------------
-
-This feature is marked EXPERIMENTAL because the implementation
-directly accesses hardware registers and may not work as expected. USE
-WITH CAUTION! To use this feature, you need to supply the
-experimental=1 parameter when loading the module.
+LCD brightness control -- /proc/acpi/ibm/brightness
+---------------------------------------------------
This feature allows software control of the LCD brightness on ThinkPad
models which don't have a hardware brightness slider. The available
@@ -542,13 +505,8 @@ commands are:
The <level> number range is 0 to 7, although not all of them may be
distinct. The current brightness level is shown in the file.
-EXPERIMENTAL: Volume control -- /proc/acpi/ibm/volume
------------------------------------------------------
-
-This feature is marked EXPERIMENTAL because the implementation
-directly accesses hardware registers and may not work as expected. USE
-WITH CAUTION! To use this feature, you need to supply the
-experimental=1 parameter when loading the module.
+Volume control -- /proc/acpi/ibm/volume
+---------------------------------------
This feature allows volume control on ThinkPad models which don't have
a hardware volume knob. The available commands are:
@@ -611,6 +569,23 @@ with the following command:
echo 'level <level>' > /proc/acpi/ibm/thermal
+EXPERIMENTAL: WAN -- /proc/acpi/ibm/wan
+---------------------------------------
+
+This feature is marked EXPERIMENTAL because the implementation
+directly accesses hardware registers and may not work as expected. USE
+WITH CAUTION! To use this feature, you need to supply the
+experimental=1 parameter when loading the module.
+
+This feature shows the presence and current state of a WAN (Sierra
+Wireless EV-DO) device. If WAN is installed, the following commands can
+be used:
+
+ echo enable > /proc/acpi/ibm/wan
+ echo disable > /proc/acpi/ibm/wan
+
+It was tested on a Lenovo Thinkpad X60. It should probably work on other
+Thinkpad models which come with this module installed.
Multiple Commands, Module Parameters
------------------------------------
diff --git a/arch/i386/kernel/acpi/cstate.c b/arch/i386/kernel/acpi/cstate.c
index 25db49ef177..20563e52c62 100644
--- a/arch/i386/kernel/acpi/cstate.c
+++ b/arch/i386/kernel/acpi/cstate.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
+#include <linux/cpu.h>
#include <acpi/processor.h>
#include <asm/acpi.h>
@@ -41,5 +42,124 @@ void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
flags->bm_check = 1;
}
}
-
EXPORT_SYMBOL(acpi_processor_power_init_bm_check);
+
+/* The code below handles cstate entry with monitor-mwait pair on Intel*/
+
+struct cstate_entry_s {
+ struct {
+ unsigned int eax;
+ unsigned int ecx;
+ } states[ACPI_PROCESSOR_MAX_POWER];
+};
+static struct cstate_entry_s *cpu_cstate_entry; /* per CPU ptr */
+
+static short mwait_supported[ACPI_PROCESSOR_MAX_POWER];
+
+#define MWAIT_SUBSTATE_MASK (0xf)
+#define MWAIT_SUBSTATE_SIZE (4)
+
+#define CPUID_MWAIT_LEAF (5)
+#define CPUID5_ECX_EXTENSIONS_SUPPORTED (0x1)
+#define CPUID5_ECX_INTERRUPT_BREAK (0x2)
+
+#define MWAIT_ECX_INTERRUPT_BREAK (0x1)
+
+#define NATIVE_CSTATE_BEYOND_HALT (2)
+
+int acpi_processor_ffh_cstate_probe(unsigned int cpu,
+ struct acpi_processor_cx *cx, struct acpi_power_register *reg)
+{
+ struct cstate_entry_s *percpu_entry;
+ struct cpuinfo_x86 *c = cpu_data + cpu;
+
+ cpumask_t saved_mask;
+ int retval;
+ unsigned int eax, ebx, ecx, edx;
+ unsigned int edx_part;
+ unsigned int cstate_type; /* C-state type and not ACPI C-state type */
+ unsigned int num_cstate_subtype;
+
+ if (!cpu_cstate_entry || c->cpuid_level < CPUID_MWAIT_LEAF )
+ return -1;
+
+ if (reg->bit_offset != NATIVE_CSTATE_BEYOND_HALT)
+ return -1;
+
+ percpu_entry = per_cpu_ptr(cpu_cstate_entry, cpu);
+ percpu_entry->states[cx->index].eax = 0;
+ percpu_entry->states[cx->index].ecx = 0;
+
+ /* Make sure we are running on right CPU */
+ saved_mask = current->cpus_allowed;
+ retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
+ if (retval)
+ return -1;
+
+ cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &edx);
+
+ /* Check whether this particular cx_type (in CST) is supported or not */
+ cstate_type = (cx->address >> MWAIT_SUBSTATE_SIZE) + 1;
+ edx_part = edx >> (cstate_type * MWAIT_SUBSTATE_SIZE);
+ num_cstate_subtype = edx_part & MWAIT_SUBSTATE_MASK;
+
+ retval = 0;
+ if (num_cstate_subtype < (cx->address & MWAIT_SUBSTATE_MASK)) {
+ retval = -1;
+ goto out;
+ }
+
+ /* mwait ecx extensions INTERRUPT_BREAK should be supported for C2/C3 */
+ if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||
+ !(ecx & CPUID5_ECX_INTERRUPT_BREAK)) {
+ retval = -1;
+ goto out;
+ }
+ percpu_entry->states[cx->index].ecx = MWAIT_ECX_INTERRUPT_BREAK;
+
+ /* Use the hint in CST */
+ percpu_entry->states[cx->index].eax = cx->address;
+
+ if (!mwait_supported[cstate_type]) {
+ mwait_supported[cstate_type] = 1;
+ printk(KERN_DEBUG "Monitor-Mwait will be used to enter C-%d "
+ "state\n", cx->type);
+ }
+
+out:
+ set_cpus_allowed(current, saved_mask);
+ return retval;
+}
+EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe);
+
+void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cx)
+{
+ unsigned int cpu = smp_processor_id();
+ struct cstate_entry_s *percpu_entry;
+
+ percpu_entry = per_cpu_ptr(cpu_cstate_entry, cpu);
+ mwait_idle_with_hints(percpu_entry->states[cx->index].eax,
+ percpu_entry->states[cx->index].ecx);
+}
+EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_enter);
+
+static int __init ffh_cstate_init(void)
+{
+ struct cpuinfo_x86 *c = &boot_cpu_data;
+ if (c->x86_vendor != X86_VENDOR_INTEL)
+ return -1;
+
+ cpu_cstate_entry = alloc_percpu(struct cstate_entry_s);
+ return 0;
+}
+
+static void __exit ffh_cstate_exit(void)
+{
+ if (cpu_cstate_entry) {
+ free_percpu(cpu_cstate_entry);
+ cpu_cstate_entry = NULL;
+ }
+}
+
+arch_initcall(ffh_cstate_init);
+__exitcall(ffh_cstate_exit);
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index b0a07801d9d..57d375900af 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -236,20 +236,28 @@ EXPORT_SYMBOL_GPL(cpu_idle_wait);
* We execute MONITOR against need_resched and enter optimized wait state
* through MWAIT. Whenever someone changes need_resched, we would be woken
* up from MWAIT (without an IPI).
+ *
+ * New with Core Duo processors, MWAIT can take some hints based on CPU
+ * capability.
*/
-static void mwait_idle(void)
+void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
{
- local_irq_enable();
-
- while (!need_resched()) {
+ if (!need_resched()) {
__monitor((void *)&current_thread_info()->flags, 0, 0);
smp_mb();
- if (need_resched())
- break;
- __mwait(0, 0);
+ if (!need_resched())
+ __mwait(eax, ecx);
}
}
+/* Default MONITOR/MWAIT with no hints, used for default C1 state */
+static void mwait_idle(void)
+{
+ local_irq_enable();
+ while (!need_resched())
+ mwait_idle_with_hints(0, 0);
+}
+
void __devinit select_idle_routine(const struct cpuinfo_x86 *c)
{
if (cpu_has(c, X86_FEATURE_MWAIT)) {
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 5e95b257ee2..49f7fac6229 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -238,20 +238,28 @@ void cpu_idle (void)
* We execute MONITOR against need_resched and enter optimized wait state
* through MWAIT. Whenever someone changes need_resched, we would be woken
* up from MWAIT (without an IPI).
+ *
+ * New with Core Duo processors, MWAIT can take some hints based on CPU
+ * capability.
*/
-static void mwait_idle(void)
+void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
{
- local_irq_enable();
-
- while (!need_resched()) {
+ if (!need_resched()) {
__monitor((void *)&current_thread_info()->flags, 0, 0);
smp_mb();
- if (need_resched())
- break;
- __mwait(0, 0);
+ if (!need_resched())
+ __mwait(eax, ecx);
}
}
+/* Default MONITOR/MWAIT with no hints, used for default C1 state */
+static void mwait_idle(void)
+{
+ local_irq_enable();
+ while (!need_resched())
+ mwait_idle_with_hints(0,0);
+}
+
void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
{
static int printed;
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index e9ee4c52a5f..c7ac9297a20 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -138,6 +138,7 @@ struct asus_hotk {
S2x, //S200 (J1 reported), Victor MP-XP7210
W1N, //W1000N
W5A, //W5A
+ W3V, //W3030V
xxN, //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
//(Centrino)
END_MODEL
@@ -376,6 +377,17 @@ static struct model_data model_conf[END_MODEL] = {
.display_get = "\\ADVG"},
{
+ .name = "W3V",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\BKLT",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
.name = "xxN",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
@@ -555,11 +567,11 @@ static int
write_led(const char __user * buffer, unsigned long count,
char *ledname, int ledmask, int invert)
{
- int value;
+ int rv, value;
int led_out = 0;
- count = parse_arg(buffer, count, &value);
- if (count > 0)
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
led_out = value ? 1 : 0;
hotk->status =
@@ -572,7 +584,7 @@ write_led(const char __user * buffer, unsigned long count,
printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
ledname);
- return count;
+ return rv;
}
/*
@@ -607,20 +619,18 @@ static int
proc_write_ledd(struct file *file, const char __user * buffer,
unsigned long count, void *data)
{
- int value;
+ int rv, value;
- count = parse_arg(buffer, count, &value);
- if (count > 0) {
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0) {
if (!write_acpi_int
(hotk->handle, hotk->methods->mt_ledd, value, NULL))
printk(KERN_WARNING
"Asus ACPI: LED display write failed\n");
else
hotk->ledd_status = (u32) value;
- } else if (count < 0)
- printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
-
- return count;
+ }
+ return rv;
}
/*
@@ -761,12 +771,12 @@ static int
proc_write_lcd(struct file *file, const char __user * buffer,
unsigned long count, void *data)
{
- int value;
+ int rv, value;
- count = parse_arg(buffer, count, &value);
- if (count > 0)
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
set_lcd_state(value);
- return count;
+ return rv;
}
static int read_brightness(void)
@@ -830,18 +840,15 @@ static int
proc_write_brn(struct file *file, const char __user * buffer,
unsigned long count, void *data)
{
- int value;
+ int rv, value;
- count = parse_arg(buffer, count, &value);
- if (count > 0) {
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0) {
value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
/* 0 <= value <= 15 */
set_brightness(value);
- } else if (count < 0) {
- printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
}
-
- return count;
+ return rv;
}
static void set_display(int value)
@@ -880,15 +887,12 @@ static int
proc_write_disp(struct file *file, const char __user * buffer,
unsigned long count, void *data)
{
- int value;
+ int rv, value;
- count = parse_arg(buffer, count, &value);
- if (count > 0)
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
set_display(value);
- else if (count < 0)
- printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
-
- return count;
+ return rv;
}
typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
@@ -1097,6 +1101,8 @@ static int asus_model_match(char *model)
return A4G;
else if (strncmp(model, "W1N", 3) == 0)
return W1N;
+ else if (strncmp(model, "W3V", 3) == 0)
+ return W3V;
else if (strncmp(model, "W5A", 3) == 0)
return W5A;
else
@@ -1200,9 +1206,10 @@ static int asus_hotk_get_info(void)
hotk->methods->mt_wled = NULL;
/* L5D's WLED is not controlled by ACPI */
else if (strncmp(string, "M2N", 3) == 0 ||
+ strncmp(string, "W3V", 3) == 0 ||
strncmp(string, "S1N", 3) == 0)
hotk->methods->mt_wled = "WLED";
- /* M2N and S1N have a usable WLED */
+ /* M2N, S1N and W3V have a usable WLED */
else if (asus_info) {
if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
hotk->methods->mled_status = NULL;
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9810e2a55d0..026e40755cd 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -64,6 +64,7 @@ extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
static int acpi_battery_add(struct acpi_device *device);
static int acpi_battery_remove(struct acpi_device *device, int type);
+static int acpi_battery_resume(struct acpi_device *device, int status);
static struct acpi_driver acpi_battery_driver = {
.name = ACPI_BATTERY_DRIVER_NAME,
@@ -71,6 +72,7 @@ static struct acpi_driver acpi_battery_driver = {
.ids = ACPI_BATTERY_HID,
.ops = {
.add = acpi_battery_add,
+ .resume = acpi_battery_resume,
.remove = acpi_battery_remove,
},
};
@@ -753,6 +755,18 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
return 0;
}
+/* this is needed to learn about changes made in suspended state */
+static int acpi_battery_resume(struct acpi_device *device, int state)
+{
+ struct acpi_battery *battery;
+
+ if (!device)
+ return -EINVAL;
+
+ battery = device->driver_data;
+ return acpi_battery_check(battery);
+}
+
static int __init acpi_battery_init(void)
{
int result;
diff --git a/drivers/acpi/events/evrgnini.c b/drivers/acpi/events/evrgnini.c
index 5b3c7a85eb9..203d1359190 100644
--- a/drivers/acpi/events/evrgnini.c
+++ b/drivers/acpi/events/evrgnini.c
@@ -225,13 +225,12 @@ acpi_ev_pci_config_region_setup(acpi_handle handle,
if (!
(ACPI_STRNCMP
(object_hID.value, PCI_ROOT_HID_STRING,
- sizeof(PCI_ROOT_HID_STRING))
- ||
- !(ACPI_STRNCMP
- (object_hID.value,
- PCI_EXPRESS_ROOT_HID_STRING,
- sizeof(PCI_EXPRESS_ROOT_HID_STRING)))))
- {
+ sizeof(PCI_ROOT_HID_STRING)))
+ ||
+ !(ACPI_STRNCMP
+ (object_hID.value,
+ PCI_EXPRESS_ROOT_HID_STRING,
+ sizeof(PCI_EXPRESS_ROOT_HID_STRING)))) {
/* Install a handler for this PCI root bridge */
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index 15fc12482ba..003a9876c96 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -1702,13 +1702,11 @@ static struct ibm_struct ibms[] = {
.name = "brightness",
.read = brightness_read,
.write = brightness_write,
- .experimental = 1,
},
{
.name = "volume",
.read = volume_read,
.write = volume_write,
- .experimental = 1,
},
{
.name = "fan",
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 0a395fca843..429a39dbd75 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -219,6 +219,23 @@ static void acpi_safe_halt(void)
static atomic_t c3_cpu_count;
+/* Common C-state entry for C2, C3, .. */
+static void acpi_cstate_enter(struct acpi_processor_cx *cstate)
+{
+ if (cstate->space_id == ACPI_CSTATE_FFH) {
+ /* Call into architectural FFH based C-state */
+ acpi_processor_ffh_cstate_enter(cstate);
+ } else {
+ int unused;
+ /* IO port based C-state */
+ inb(cstate->address);
+ /* Dummy wait op - must do something useless after P_LVL2 read
+ because chipsets cannot guarantee that STPCLK# signal
+ gets asserted in time to freeze execution properly. */
+ unused = inl(acpi_fadt.xpm_tmr_blk.address);
+ }
+}
+
static void acpi_processor_idle(void)
{
struct acpi_processor *pr = NULL;
@@ -361,11 +378,7 @@ static void acpi_processor_idle(void)
/* Get start time (ticks) */
t1 = inl(acpi_fadt.xpm_tmr_blk.address);
/* Invoke C2 */
- inb(cx->address);
- /* Dummy wait op - must do something useless after P_LVL2 read
- because chipsets cannot guarantee that STPCLK# signal
- gets asserted in time to freeze execution properly. */
- t2 = inl(acpi_fadt.xpm_tmr_blk.address);
+ acpi_cstate_enter(cx);
/* Get end time (ticks) */
t2 = inl(acpi_fadt.xpm_tmr_blk.address);
@@ -401,9 +414,7 @@ static void acpi_processor_idle(void)
/* Get start time (ticks) */
t1 = inl(acpi_fadt.xpm_tmr_blk.address);
/* Invoke C3 */
- inb(cx->address);
- /* Dummy wait op (see above) */
- t2 = inl(acpi_fadt.xpm_tmr_blk.address);
+ acpi_cstate_enter(cx);
/* Get end time (ticks) */
t2 = inl(acpi_fadt.xpm_tmr_blk.address);
if (pr->flags.bm_check) {
@@ -628,20 +639,16 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
return 0;
}
-static int acpi_processor_get_power_info_default_c1(struct acpi_processor *pr)
+static int acpi_processor_get_power_info_default(struct acpi_processor *pr)
{
-
- /* Zero initialize all the C-states info. */
- memset(pr->power.states, 0, sizeof(pr->power.states));
-
- /* set the first C-State to C1 */
- pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;
-
- /* the C0 state only exists as a filler in our array,
- * and all processors need to support C1 */
+ if (!pr->power.states[ACPI_STATE_C1].valid) {
+ /* set the first C-State to C1 */
+ /* all processors need to support C1 */
+ pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;
+ pr->power.states[ACPI_STATE_C1].valid = 1;
+ }
+ /* the C0 state only exists as a filler in our array */
pr->power.states[ACPI_STATE_C0].valid = 1;
- pr->power.states[ACPI_STATE_C1].valid = 1;
-
return 0;
}
@@ -658,12 +665,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
if (nocst)
return -ENODEV;
- current_count = 1;
-
- /* Zero initialize C2 onwards and prepare for fresh CST lookup */
- for (i = 2; i < ACPI_PROCESSOR_MAX_POWER; i++)
- memset(&(pr->power.states[i]), 0,
- sizeof(struct acpi_processor_cx));
+ current_count = 0;
status = acpi_evaluate_object(pr->handle, "_CST", NULL, &buffer);
if (ACPI_FAILURE(status)) {
@@ -718,22 +720,39 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
(reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE))
continue;
- cx.address = (reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) ?
- 0 : reg->address;
-
/* There should be an easy way to extract an integer... */
obj = (union acpi_object *)&(element->package.elements[1]);
if (obj->type != ACPI_TYPE_INTEGER)
continue;
cx.type = obj->integer.value;
-
- if ((cx.type != ACPI_STATE_C1) &&
- (reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO))
- continue;
-
- if ((cx.type < ACPI_STATE_C2) || (cx.type > ACPI_STATE_C3))
- continue;
+ /*
+ * Some buggy BIOSes won't list C1 in _CST -
+ * Let acpi_processor_get_power_info_default() handle them later
+ */
+ if (i == 1 && cx.type != ACPI_STATE_C1)
+ current_count++;
+
+ cx.address = reg->address;
+ cx.index = current_count + 1;
+
+ cx.space_id = ACPI_CSTATE_SYSTEMIO;
+ if (reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
+ if (acpi_processor_ffh_cstate_probe
+ (pr->id, &cx, reg) == 0) {
+ cx.space_id = ACPI_CSTATE_FFH;
+ } else if (cx.type != ACPI_STATE_C1) {
+ /*
+ * C1 is a special case where FIXED_HARDWARE
+ * can be handled in non-MWAIT way as well.
+ * In that case, save this _CST entry info.
+ * That is, we retain space_id of SYSTEM_IO for
+ * halt based C1.
+ * Otherwise, ignore this info and continue.
+ */
+ continue;
+ }
+ }
obj = (union acpi_object *)&(element->package.elements[2]);
if (obj->type != ACPI_TYPE_INTEGER)
@@ -938,12 +957,18 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr)
/* NOTE: the idle thread may not be running while calling
* this function */
- /* Adding C1 state */
- acpi_processor_get_power_info_default_c1(pr);
+ /* Zero initialize all the C-states info. */
+ memset(pr->power.states, 0, sizeof(pr->power.states));
+
result = acpi_processor_get_power_info_cst(pr);
if (result == -ENODEV)
acpi_processor_get_power_info_fadt(pr);
+ if (result)
+ return result;
+
+ acpi_processor_get_power_info_default(pr);
+
pr->power.count = acpi_processor_power_verify(pr);
/*
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 62bef0b3b61..8908a975e57 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -98,11 +98,11 @@ static int update_info_mode = UPDATE_INFO_MODE;
static int update_time = UPDATE_TIME;
static int update_time2 = UPDATE_TIME2;
-module_param(capacity_mode, int, CAPACITY_UNIT);
-module_param(update_mode, int, UPDATE_MODE);
-module_param(update_info_mode, int, UPDATE_INFO_MODE);
-module_param(update_time, int, UPDATE_TIME);
-module_param(update_time2, int, UPDATE_TIME2);
+module_param(capacity_mode, int, 0);
+module_param(update_mode, int, 0);
+module_param(update_info_mode, int, 0);
+module_param(update_time, int, 0);
+module_param(update_time2, int, 0);
static int acpi_sbs_add(struct acpi_device *device);
static int acpi_sbs_remove(struct acpi_device *device, int type);
@@ -1685,10 +1685,16 @@ static int acpi_sbs_add(struct acpi_device *device)
int acpi_sbs_remove(struct acpi_device *device, int type)
{
- struct acpi_sbs *sbs = (struct acpi_sbs *)acpi_driver_data(device);
+ struct acpi_sbs *sbs = NULL;
int id;
- if (!device || !sbs) {
+ if (!device) {
+ return -EINVAL;
+ }
+
+ sbs = (struct acpi_sbs *)acpi_driver_data(device);
+
+ if (!sbs) {
return -EINVAL;
}
diff --git a/include/acpi/pdc_intel.h b/include/acpi/pdc_intel.h
index c5472be6f3a..e72bfdd887f 100644
--- a/include/acpi/pdc_intel.h
+++ b/include/acpi/pdc_intel.h
@@ -13,6 +13,7 @@
#define ACPI_PDC_SMP_C_SWCOORD (0x0040)
#define ACPI_PDC_SMP_T_SWCOORD (0x0080)
#define ACPI_PDC_C_C1_FFH (0x0100)
+#define ACPI_PDC_C_C2C3_FFH (0x0200)
#define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
@@ -23,8 +24,10 @@
ACPI_PDC_SMP_P_SWCOORD | \
ACPI_PDC_P_FFH)
-#define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \
- ACPI_PDC_SMP_C1PT | \
- ACPI_PDC_C_C1_HALT)
+#define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \
+ ACPI_PDC_SMP_C1PT | \
+ ACPI_PDC_C_C1_HALT | \
+ ACPI_PDC_C_C1_FFH | \
+ ACPI_PDC_C_C2C3_FFH)
#endif /* __PDC_INTEL_H__ */
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 9dd5b75961f..7798d2a9f79 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -29,6 +29,9 @@
#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
+#define ACPI_CSTATE_SYSTEMIO (0)
+#define ACPI_CSTATE_FFH (1)
+
/* Power Management */
struct acpi_processor_cx;
@@ -58,6 +61,8 @@ struct acpi_processor_cx {
u8 valid;
u8 type;
u32 address;
+ u8 space_id;
+ u8 index;
u32 latency;
u32 latency_ticks;
u32 power;
@@ -206,6 +211,9 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
#ifdef ARCH_HAS_POWER_INIT
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
unsigned int cpu);
+int acpi_processor_ffh_cstate_probe(unsigned int cpu,
+ struct acpi_processor_cx *cx, struct acpi_power_register *reg);
+void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
#else
static inline void acpi_processor_power_init_bm_check(struct
acpi_processor_flags
@@ -214,6 +222,16 @@ static inline void acpi_processor_power_init_bm_check(struct
flags->bm_check = 1;
return;
}
+static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
+ struct acpi_processor_cx *cx, struct acpi_power_register *reg)
+{
+ return -1;
+}
+static inline void acpi_processor_ffh_cstate_enter(
+ struct acpi_processor_cx *cstate)
+{
+ return;
+}
#endif
/* in processor_perflib.c */
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index 2277127696d..e0ddca94d50 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -306,6 +306,8 @@ static inline void __mwait(unsigned long eax, unsigned long ecx)
: :"a" (eax), "c" (ecx));
}
+extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+
/* from system description table in BIOS. Mostly for MCA use, but
others may find it useful. */
extern unsigned int machine_id;
diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h
index de9c3147ee4..cef17e0f828 100644
--- a/include/asm-x86_64/processor.h
+++ b/include/asm-x86_64/processor.h
@@ -475,6 +475,8 @@ static inline void __mwait(unsigned long eax, unsigned long ecx)
: :"a" (eax), "c" (ecx));
}
+extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
+
#define stack_current() \
({ \
struct thread_info *ti; \
generated by cgit (git 2.34.1) at 2025-01-16 05:07:26 +0000