Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb...

[pandora-kernel.git] / drivers / idle / intel_idle.c

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index c37ef64..41665d2 100644 (file)
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -59,18 +59,11 @@
 #include <linux/hrtimer.h>     /* ktime_get_real() */
 #include <trace/events/power.h>
 #include <linux/sched.h>
+#include <asm/mwait.h>
 
 #define INTEL_IDLE_VERSION "0.4"
 #define PREFIX "intel_idle: "
 
-#define MWAIT_SUBSTATE_MASK    (0xf)
-#define MWAIT_CSTATE_MASK      (0xf)
-#define MWAIT_SUBSTATE_SIZE    (4)
-#define MWAIT_MAX_NUM_CSTATES  8
-#define CPUID_MWAIT_LEAF (5)
-#define CPUID5_ECX_EXTENSIONS_SUPPORTED (0x1)
-#define CPUID5_ECX_INTERRUPT_BREAK     (0x2)
-
 static struct cpuidle_driver intel_idle_driver = {
        .name = "intel_idle",
        .owner = THIS_MODULE,
@@ -81,7 +74,7 @@ static int max_cstate = MWAIT_MAX_NUM_CSTATES - 1;
 static unsigned int mwait_substates;
 
 /* Reliable LAPIC Timer States, bit 1 for C1 etc.  */
-static unsigned int lapic_timer_reliable_states;
+static unsigned int lapic_timer_reliable_states = (1 << 1);     /* Default to only C1 */
 
 static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
 static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state);
@@ -101,7 +94,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x00,
                .flags = CPUIDLE_FLAG_TIME_VALID,
                .exit_latency = 3,
-               .power_usage = 1000,
                .target_residency = 6,
                .enter = &intel_idle },
        { /* MWAIT C2 */
@@ -110,7 +102,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x10,
                .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
                .exit_latency = 20,
-               .power_usage = 500,
                .target_residency = 80,
                .enter = &intel_idle },
        { /* MWAIT C3 */
@@ -119,11 +110,46 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x20,
                .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
                .exit_latency = 200,
-               .power_usage = 350,
                .target_residency = 800,
                .enter = &intel_idle },
 };
 
+static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
+       { /* MWAIT C0 */ },
+       { /* MWAIT C1 */
+               .name = "SNB-C1",
+               .desc = "MWAIT 0x00",
+               .driver_data = (void *) 0x00,
+               .flags = CPUIDLE_FLAG_TIME_VALID,
+               .exit_latency = 1,
+               .target_residency = 4,
+               .enter = &intel_idle },
+       { /* MWAIT C2 */
+               .name = "SNB-C3",
+               .desc = "MWAIT 0x10",
+               .driver_data = (void *) 0x10,
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 80,
+               .target_residency = 160,
+               .enter = &intel_idle },
+       { /* MWAIT C3 */
+               .name = "SNB-C6",
+               .desc = "MWAIT 0x20",
+               .driver_data = (void *) 0x20,
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 104,
+               .target_residency = 208,
+               .enter = &intel_idle },
+       { /* MWAIT C4 */
+               .name = "SNB-C7",
+               .desc = "MWAIT 0x30",
+               .driver_data = (void *) 0x30,
+               .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 109,
+               .target_residency = 300,
+               .enter = &intel_idle },
+};
+
 static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
        { /* MWAIT C0 */ },
        { /* MWAIT C1 */
@@ -132,7 +158,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x00,
                .flags = CPUIDLE_FLAG_TIME_VALID,
                .exit_latency = 1,
-               .power_usage = 1000,
                .target_residency = 4,
                .enter = &intel_idle },
        { /* MWAIT C2 */
@@ -141,7 +166,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x10,
                .flags = CPUIDLE_FLAG_TIME_VALID,
                .exit_latency = 20,
-               .power_usage = 500,
                .target_residency = 80,
                .enter = &intel_idle },
        { /* MWAIT C3 */ },
@@ -151,7 +175,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x30,
                .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
                .exit_latency = 100,
-               .power_usage = 250,
                .target_residency = 400,
                .enter = &intel_idle },
        { /* MWAIT C5 */ },
@@ -161,7 +184,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
                .driver_data = (void *) 0x52,
                .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
                .exit_latency = 140,
-               .power_usage = 150,
                .target_residency = 560,
                .enter = &intel_idle },
 };
@@ -186,13 +208,10 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state)
        local_irq_disable();
 
        /*
-        * If the state flag indicates that the TLB will be flushed or if this
-        * is the deepest c-state supported, do a voluntary leave mm to avoid
-        * costly and mostly unnecessary wakeups for flushing the user TLB's
-        * associated with the active mm.
+        * leave_mm() to avoid costly and often unnecessary wakeups
+        * for flushing the user TLB's associated with the active mm.
         */
-       if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED ||
-           (&dev->states[dev->state_count - 1] == state))
+       if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
                leave_mm(cpu);
 
        if (!(lapic_timer_reliable_states & (1 << (cstate))))
@@ -276,9 +295,14 @@ static int intel_idle_probe(void)
 
        case 0x1C:      /* 28 - Atom Processor */
        case 0x26:      /* 38 - Lincroft Atom Processor */
-               lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */
+               lapic_timer_reliable_states = (1 << 1); /* C1 */
                cpuidle_state_table = atom_cstates;
                break;
+
+       case 0x2A:      /* SNB */
+       case 0x2D:      /* SNB Xeon */
+               cpuidle_state_table = snb_cstates;
+               break;
 #ifdef FUTURE_USE
        case 0x17:      /* 23 - Core 2 Duo */
                lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */