[PATCH 10/19] powerpc: move get_longbusy_msecs out of ehca/ehea

[Robert Jennings]

From: Robert Jennings <rcj at linux.vnet.ibm.com>

In support of Cooperative Memory Overcommitment (CMO) this moves
get_longbusy_msecs() out of the ehca and ehea drivers and into the 
architecture's hvcall header as plpar_get_longbusy_msecs.  Some firmware
calls made in pSeries platform iommu code will need to share this
functionality.

Signed-off-by: Robert Jennings <rcj at linux.vnet.ibm.com>

---
 drivers/infiniband/hw/ehca/hcp_if.c |   24 ++----------------------
 drivers/net/ehea/ehea_phyp.c        |    4 ++--
 drivers/net/ehea/ehea_phyp.h        |   20 --------------------
 include/asm-powerpc/hvcall.h        |   27 +++++++++++++++++++++++++++
 4 files changed, 31 insertions(+), 44 deletions(-)

Index: b/drivers/infiniband/hw/ehca/hcp_if.c
===================================================================
--- a/drivers/infiniband/hw/ehca/hcp_if.c
+++ b/drivers/infiniband/hw/ehca/hcp_if.c
@@ -90,26 +90,6 @@
 
 static DEFINE_SPINLOCK(hcall_lock);
 
-static u32 get_longbusy_msecs(int longbusy_rc)
-{
-	switch (longbusy_rc) {
-	case H_LONG_BUSY_ORDER_1_MSEC:
-		return 1;
-	case H_LONG_BUSY_ORDER_10_MSEC:
-		return 10;
-	case H_LONG_BUSY_ORDER_100_MSEC:
-		return 100;
-	case H_LONG_BUSY_ORDER_1_SEC:
-		return 1000;
-	case H_LONG_BUSY_ORDER_10_SEC:
-		return 10000;
-	case H_LONG_BUSY_ORDER_100_SEC:
-		return 100000;
-	default:
-		return 1;
-	}
-}
-
 static long ehca_plpar_hcall_norets(unsigned long opcode,
 				    unsigned long arg1,
 				    unsigned long arg2,
@@ -139,7 +119,7 @@ static long ehca_plpar_hcall_norets(unsi
 			spin_unlock_irqrestore(&hcall_lock, flags);
 
 		if (H_IS_LONG_BUSY(ret)) {
-			sleep_msecs = get_longbusy_msecs(ret);
+			sleep_msecs = plpar_get_longbusy_msecs(ret);
 			msleep_interruptible(sleep_msecs);
 			continue;
 		}
@@ -192,7 +172,7 @@ static long ehca_plpar_hcall9(unsigned l
 			spin_unlock_irqrestore(&hcall_lock, flags);
 
 		if (H_IS_LONG_BUSY(ret)) {
-			sleep_msecs = get_longbusy_msecs(ret);
+			sleep_msecs = plpar_get_longbusy_msecs(ret);
 			msleep_interruptible(sleep_msecs);
 			continue;
 		}
Index: b/drivers/net/ehea/ehea_phyp.c
===================================================================
--- a/drivers/net/ehea/ehea_phyp.c
+++ b/drivers/net/ehea/ehea_phyp.c
@@ -61,7 +61,7 @@ static long ehea_plpar_hcall_norets(unsi
 					 arg5, arg6, arg7);
 
 		if (H_IS_LONG_BUSY(ret)) {
-			sleep_msecs = get_longbusy_msecs(ret);
+			sleep_msecs = plpar_get_longbusy_msecs(ret);
 			msleep_interruptible(sleep_msecs);
 			continue;
 		}
@@ -102,7 +102,7 @@ static long ehea_plpar_hcall9(unsigned l
 				   arg6, arg7, arg8, arg9);
 
 		if (H_IS_LONG_BUSY(ret)) {
-			sleep_msecs = get_longbusy_msecs(ret);
+			sleep_msecs = plpar_get_longbusy_msecs(ret);
 			msleep_interruptible(sleep_msecs);
 			continue;
 		}
Index: b/drivers/net/ehea/ehea_phyp.h
===================================================================
--- a/drivers/net/ehea/ehea_phyp.h
+++ b/drivers/net/ehea/ehea_phyp.h
@@ -40,26 +40,6 @@
  * hcp_*  - structures, variables and functions releated to Hypervisor Calls
  */
 
-static inline u32 get_longbusy_msecs(int long_busy_ret_code)
-{
-	switch (long_busy_ret_code) {
-	case H_LONG_BUSY_ORDER_1_MSEC:
-		return 1;
-	case H_LONG_BUSY_ORDER_10_MSEC:
-		return 10;
-	case H_LONG_BUSY_ORDER_100_MSEC:
-		return 100;
-	case H_LONG_BUSY_ORDER_1_SEC:
-		return 1000;
-	case H_LONG_BUSY_ORDER_10_SEC:
-		return 10000;
-	case H_LONG_BUSY_ORDER_100_SEC:
-		return 100000;
-	default:
-		return 1;
-	}
-}
-
 /* Number of pages which can be registered at once by H_REGISTER_HEA_RPAGES */
 #define EHEA_MAX_RPAGE 512
 
Index: b/include/asm-powerpc/hvcall.h
===================================================================
--- a/include/asm-powerpc/hvcall.h
+++ b/include/asm-powerpc/hvcall.h
@@ -222,6 +222,33 @@
 #ifndef __ASSEMBLY__
 
 /**
+ * plpar_get_longbusy_msecs: - Return number of msecs for H_LONG_BUSY* response
+ * @long_busy_ret_code: The H_LONG_BUSY_* constant to process
+ *
+ * This returns the number of msecs that corresponds to an H_LONG_BUSY_*
+ * response from a plpar_hcall.  If there is no match 1 is returned.
+ */
+static inline u32 plpar_get_longbusy_msecs(int long_busy_ret_code)
+{
+	switch (long_busy_ret_code) {
+	case H_LONG_BUSY_ORDER_1_MSEC:
+		return 1;
+	case H_LONG_BUSY_ORDER_10_MSEC:
+		return 10;
+	case H_LONG_BUSY_ORDER_100_MSEC:
+		return 100;
+	case H_LONG_BUSY_ORDER_1_SEC:
+		return 1000;
+	case H_LONG_BUSY_ORDER_10_SEC:
+		return 10000;
+	case H_LONG_BUSY_ORDER_100_SEC:
+		return 100000;
+	default:
+		return 1;
+	}
+}
+
+/**
  * plpar_hcall_norets: - Make a pseries hypervisor call with no return arguments
  * @opcode: The hypervisor call to make.
  *