powerpc/powernv: Move GET_FIELD/SET_FIELD to vas.h

Move the GET_FIELD and SET_FIELD macros to vas.h as VAS and other
users of VAS, including NX-842 can use those macros.

There is a lot of related code between the VAS/NX kernel drivers
and skiboot. For consistency, switch the order of parameters in
SET_FIELD to match the order in skiboot.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Reviewed-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/vas.h

@@ -29,6 +29,14 @@
 #define VAS_THRESH_FIFO_GT_QTR_FULL	2
 #define VAS_THRESH_FIFO_GT_EIGHTH_FULL	3
 
+/*
+ * Get/Set bit fields
+ */
+#define GET_FIELD(m, v)                (((v) & (m)) >> MASK_LSH(m))
+#define MASK_LSH(m)            (__builtin_ffsl(m) - 1)
+#define SET_FIELD(m, v, val)   \
+		(((v) & ~(m)) | ((((typeof(v))(val)) << MASK_LSH(m)) & (m)))
+
 /*
  * Co-processor Engine type.
  */

drivers/crypto/nx/nx-842-powernv.c

@@ -22,6 +22,7 @@
 
 #include <asm/prom.h>
 #include <asm/icswx.h>
+#include <asm/vas.h>
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>");
@@ -424,9 +425,9 @@ static int nx842_powernv_function(const unsigned char *in, unsigned int inlen,
 
 	/* set up CCW */
 	ccw = 0;
-	ccw = SET_FIELD(ccw, CCW_CT, nx842_ct);
-	ccw = SET_FIELD(ccw, CCW_CI_842, 0); /* use 0 for hw auto-selection */
-	ccw = SET_FIELD(ccw, CCW_FC_842, fc);
+	ccw = SET_FIELD(CCW_CT, ccw, nx842_ct);
+	ccw = SET_FIELD(CCW_CI_842, ccw, 0); /* use 0 for hw auto-selection */
+	ccw = SET_FIELD(CCW_FC_842, ccw, fc);
 
 	/* set up CRB's CSB addr */
 	csb_addr = nx842_get_pa(csb) & CRB_CSB_ADDRESS;

drivers/crypto/nx/nx-842.h

@@ -100,11 +100,6 @@ static inline unsigned long nx842_get_pa(void *addr)
 	return page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr);
 }
 
-/* Get/Set bit fields */
-#define MASK_LSH(m)		(__builtin_ffsl(m) - 1)
-#define GET_FIELD(v, m)		(((v) & (m)) >> MASK_LSH(m))
-#define SET_FIELD(v, m, val)	(((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m)))
-
 /**
  * This provides the driver's constraints.  Different nx842 implementations
  * may have varying requirements.  The constraints are: