[Intel/SNB] Query the IMC Power-Down Mode

Author: cyring

corefreq-api.h

@@ -497,6 +497,7 @@ typedef struct
 	/* 4004h */		SNB_IMC_TC_RAP		RAP;	/* 32 bits    */
 	/* 4008h */		SNB_IMC_TC_RWP		RWP;	/* 32 bits    */
 	/* 400Ch */		SNB_IMC_TC_OTP		OTP;	/* 32 bits    */
+	/* 40B0h */		SNB_IMC_PDWN		PDWN;	/* 32 bits    */
 	/* 4298h */		SNB_IMC_TC_RFTP 	RFTP;	/* 32 bits    */
 	/* 42A4h */		SNB_IMC_TC_SRFTP	SRFTP;	/* 32 bits    */
 			} SNB;

corefreqd.c

@@ -3410,6 +3410,15 @@ void SNB_IMC(RO(SHM_STRUCT) *RO(Shm), RO(PROC) *RO(Proc))
 	TIMING(mc, cha).tXS = \
 			RO(Proc)->Uncore.MC[mc].Channel[cha].SNB.SRFTP.tXS;
 
+	TIMING(mc, cha).PDM_EN = \
+		0 != RO(Proc)->Uncore.MC[mc].Channel[cha].SNB.PDWN.PDWN_Mode;
+
+	TIMING(mc, cha).PDM_MODE = \
+			RO(Proc)->Uncore.MC[mc].Channel[cha].SNB.PDWN.GLPDN;
+
+	TIMING(mc, cha).PDM_AGGR = \
+			RO(Proc)->Uncore.MC[mc].Channel[cha].SNB.PDWN.PDWN_Mode;
+
       for (slot = 0; slot < RO(Shm)->Uncore.MC[mc].SlotCount; slot++)
       {
 	unsigned int width = 1;

corefreqk.c

@@ -4280,6 +4280,9 @@ void Query_SNB_IMC(void __iomem *mchmap, unsigned short mc)
 	PUBLIC(RO(Proc))->Uncore.MC[mc].Channel[cha].SNB.OTP.value = \
 					readl(mchmap + 0x400c + 0x400 * cha);
 
+	PUBLIC(RO(Proc))->Uncore.MC[mc].Channel[cha].SNB.PDWN.value = \
+					readl(mchmap + 0x40b0 + 0x400 * cha);
+
 	PUBLIC(RO(Proc))->Uncore.MC[mc].Channel[cha].SNB.RFTP.value = \
 					readl(mchmap + 0x4298 + 0x400 * cha);
 

coretypes.h

@@ -1881,15 +1881,15 @@ typedef struct
 	union {
 	  unsigned int	B2B;
 	  unsigned int	GEAR;
-	  struct {
+	};
+	struct {
 	  unsigned int	GDM	:  1-0,
 			BGS	:  2-1,
 			BGS_ALT :  3-2,
 			PDM_EN	:  4-3,
 			PDM_MODE:  5-4,
-			PDM_AGGR:  6-5,
-			Unused	: 32-6;
-	  };
+			PDM_AGGR:  9-5,
+			Unused	: 32-9;
 	};
 	unsigned int	ECC;
 } RAM_TIMING;

intelmsr.h

@@ -2741,7 +2741,7 @@ typedef union
 } SNB_IMC_TC_DBP;
 
 typedef union
-{	/* Device: 0 - Function: 0 - Offset Channel0: 4004h & Channel1: 4400h */
+{	/* Device: 0 - Function: 0 - Offset Channel0: 4004h & Channel1: 4404h */
 	unsigned int		value;
 	struct {
 		unsigned int
@@ -2831,6 +2831,31 @@ typedef union
 	} EP;
 } SNB_IMC_TC_OTP;
 
+typedef union
+{	/* Device: 0 - Function: 0 - Offset Channel0: 40B0h & Channel1: 44B0h */
+	unsigned int		value;
+	struct {
+		unsigned int
+		PDWN_Idle_Ctr	:  8-0,  /* Rank Power-down idle timer (DCLK) */
+		PDWN_Mode	: 12-8,  /*	(1)			*/
+		GLPDN		: 13-12, /*	(2)			*/
+		ReservedBits	: 32-13;
+	};
+} SNB_IMC_PDWN;
+
+/*
+ * (1)	The value 0h (no power-down) is a don't care.
+ *	0h = No Power Down
+ *	1h = APD
+ *	2h = PPD
+ *	3h = APD - PPD
+ *	6h = DLL Off
+ *	7h = APD-DLL Off
+ *
+ * (2)	1 = Power-down decision is global for channel.
+ *	0 = A separate decision is taken for each rank.
+*/
+
 typedef union
 {	/* Device: 0 - Function: 0 - Offset Channel0: 4298h & Channel1: 4698h */
 	unsigned int		value;