[PATCH v4 03/11] Move GET_FIELD/SET_FIELD to vas.h

Sukadev Bhattiprolu
2017-03-31T05:16:09Z

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>
---

Changelog[v3]
- Fix order of parameters in nx-842 driver.
---
arch/powerpc/include/uapi/asm/vas.h | 8 ++++++++
drivers/crypto/nx/nx-842-powernv.c | 7 ++++---
drivers/crypto/nx/nx-842.h | 5 -----
3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/include/uapi/asm/vas.h b/arch/powerpc/include/uapi/asm/vas.h
index ddfe046..21249f5 100644
--- a/arch/powerpc/include/uapi/asm/vas.h
+++ b/arch/powerpc/include/uapi/asm/vas.h
@@ -22,4 +22,12 @@
#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)))
+
#endif /* _UAPI_MISC_VAS_H */
diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c
index 1710f80..3abb045 100644
--- a/drivers/crypto/nx/nx-842-powernv.c
+++ b/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;
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h
index a4eee3b..30929bd 100644
--- a/drivers/crypto/nx/nx-842.h
+++ b/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:
--
2.7.4