linux-kernel - [PATCH v8 02/10] Move GET_FIELD/SET

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Message-Id: <1503987820-31933-3-git-send-email-sukadev@linux.vnet.ibm.com>
Date:   Mon, 28 Aug 2017 23:23:32 -0700
From:   Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        mikey@...ling.org, stewart@...ux.vnet.ibm.com, apopple@....ibm.com,
        hbabu@...ibm.com, oohall@...il.com, linuxppc-dev@...abs.org,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 02/10] 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@...ux.vnet.ibm.com>
Reviewed-by: Dan Streetman <ddstreet@...e.org>
---

Changelog[v7]
	[Michael Ellerman] Move the macros to <asm/vas.h> rather than
		to <uapi/asm/vas.h>

Changelog[v3]
	- Fix order of parameters in nx-842 driver.
---
 arch/powerpc/include/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/asm/vas.h b/arch/powerpc/include/asm/vas.h
index ff87e44..33e93ca 100644
--- a/arch/powerpc/include/asm/vas.h
+++ b/arch/powerpc/include/asm/vas.h
@@ -30,6 +30,14 @@
 #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.
  */
 enum vas_cop_type {
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@...e.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