[ACPI] enable C2 and C3 idle power states on SMP

http://bugzilla.kernel.org/show_bug.cgi?id=4401

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

4 files changed, 67 insertions, 14 deletions

diff --git a/include/acpi/pdc_intel.h b/include/acpi/pdc_intel.h
new file mode 100644
index 0000000..fd6730e
--- /dev/null
+++ b/include/acpi/pdc_intel.h
@@ -0,0 +1,29 @@
+
+/* _PDC bit definition for Intel processors */
+
+#ifndef __PDC_INTEL_H__
+#define __PDC_INTEL_H__
+
+#define ACPI_PDC_P_FFH			(0x0001)
+#define ACPI_PDC_C_C1_HALT		(0x0002)
+#define ACPI_PDC_T_FFH			(0x0004)
+#define ACPI_PDC_SMP_C1PT		(0x0008)
+#define ACPI_PDC_SMP_C2C3		(0x0010)
+#define ACPI_PDC_SMP_P_SWCOORD		(0x0020)
+#define ACPI_PDC_SMP_C_SWCOORD		(0x0040)
+#define ACPI_PDC_SMP_T_SWCOORD		(0x0080)
+#define ACPI_PDC_C_C1_FFH		(0x0100)
+
+
+#define ACPI_PDC_EST_CAPABILITY_SMP	(ACPI_PDC_SMP_C1PT | \
+					 ACPI_PDC_C_C1_HALT)
+
+#define ACPI_PDC_EST_CAPABILITY_SMP_MSR	(ACPI_PDC_EST_CAPABILITY_SMP | \
+					 ACPI_PDC_P_FFH)
+
+#define ACPI_PDC_C_CAPABILITY_SMP	(ACPI_PDC_SMP_C2C3 | \
+					 ACPI_PDC_SMP_C1PT | \
+					 ACPI_PDC_C_C1_HALT)
+
+#endif /* __PDC_INTEL_H__ */
+
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 2f50a5b..50cfea4 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -4,6 +4,8 @@
 #include <linux/kernel.h>
 #include <linux/config.h>
 
+#include <asm/acpi.h>
+
 #define ACPI_PROCESSOR_BUSY_METRIC	10
 
 #define ACPI_PROCESSOR_MAX_POWER	8
@@ -14,6 +16,8 @@
 #define ACPI_PROCESSOR_MAX_THROTTLE	250	/* 25% */
 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH	4
 
+#define ACPI_PDC_REVISION_ID		0x1
+
 /* Power Management */
 
 struct acpi_processor_cx;
@@ -59,6 +63,9 @@ struct acpi_processor_power {
 	u32			bm_activity;
 	int			count;
 	struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
+
+	/* the _PDC objects passed by the driver, if any */
+	struct acpi_object_list *pdc;
 };
 
 /* Performance Management */
@@ -82,8 +89,6 @@ struct acpi_processor_px {
 	acpi_integer		status;			/* success indicator */
 };
 
-#define ACPI_PDC_REVISION_ID                   0x1
-
 struct acpi_processor_performance {
 	unsigned int		 state;
 	unsigned int		 platform_limit;
@@ -179,7 +184,32 @@ int acpi_processor_notify_smm(struct module *calling_module);
 extern struct acpi_processor	*processors[NR_CPUS];
 extern struct acpi_processor_errata errata;
 
+int acpi_processor_set_pdc(struct acpi_processor *pr,
+		struct acpi_object_list *pdc_in);
+
+#ifdef ARCH_HAS_POWER_PDC_INIT
+void acpi_processor_power_init_pdc(struct acpi_processor_power *pow,
+		unsigned int cpu);
+void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
+		unsigned int cpu);
+#else
+static inline void acpi_processor_power_init_pdc(
+		struct acpi_processor_power *pow, unsigned int cpu)
+{
+	pow->pdc = NULL;
+	return;
+}
+
+static inline void acpi_processor_power_init_bm_check(
+		struct acpi_processor_flags *flags, unsigned int cpu)
+{
+	flags->bm_check = 1;
+	return;
+}
+#endif
+
 /* in processor_perflib.c */
+
 #ifdef CONFIG_CPU_FREQ
 void acpi_processor_ppc_init(void);
 void acpi_processor_ppc_exit(void);
diff --git a/include/asm-i386/acpi.h b/include/asm-i386/acpi.h
index c976c1d..cf828ac 100644
--- a/include/asm-i386/acpi.h
+++ b/include/asm-i386/acpi.h
@@ -28,6 +28,8 @@
 
 #ifdef __KERNEL__
 
+#include <acpi/pdc_intel.h>
+
 #include <asm/system.h>		/* defines cmpxchg */
 
 #define COMPILER_DEPENDENT_INT64   long long
@@ -101,12 +103,6 @@ __acpi_release_global_lock (unsigned int *lock)
         :"=r"(n_hi), "=r"(n_lo)     \
         :"0"(n_hi), "1"(n_lo))
 
-/*
- * Refer Intel ACPI _PDC support document for bit definitions
- */
-#define ACPI_PDC_EST_CAPABILITY_SMP 	0xa
-#define ACPI_PDC_EST_CAPABILITY_MSR	0x1
-
 #ifdef CONFIG_ACPI_BOOT 
 extern int acpi_lapic;
 extern int acpi_ioapic;
@@ -185,6 +181,8 @@ extern void acpi_reserve_bootmem(void);
 
 extern u8 x86_acpiid_to_apicid[];
 
+#define ARCH_HAS_POWER_PDC_INIT	1
+
 #endif /*__KERNEL__*/
 
 #endif /*_ASM_ACPI_H*/
diff --git a/include/asm-x86_64/acpi.h b/include/asm-x86_64/acpi.h
index a6b41b8..dc8c981 100644
--- a/include/asm-x86_64/acpi.h
+++ b/include/asm-x86_64/acpi.h
@@ -28,6 +28,8 @@
 
 #ifdef __KERNEL__
 
+#include <acpi/pdc_intel.h>
+
 #define COMPILER_DEPENDENT_INT64   long long
 #define COMPILER_DEPENDENT_UINT64  unsigned long long
 
@@ -99,12 +101,6 @@ __acpi_release_global_lock (unsigned int *lock)
         :"=r"(n_hi), "=r"(n_lo)     \
         :"0"(n_hi), "1"(n_lo))
 
-/*
- * Refer Intel ACPI _PDC support document for bit definitions
- */
-#define ACPI_PDC_EST_CAPABILITY_SMP 	0xa
-#define ACPI_PDC_EST_CAPABILITY_MSR	0x1
-
 #ifdef CONFIG_ACPI_BOOT
 extern int acpi_lapic;
 extern int acpi_ioapic;