From 1d39a5e4ce09172358a5435a3411a46e76a04bb4 Mon Sep 17 00:00:00 2001
From: Janne Huttunen <janne.huttunen@nokia.com>
Date: Thu, 13 Aug 2015 16:21:46 +0300
Subject: STAGING: Octeon: Use common helpers for determining interface and
 port

Currently the Octeon Ethernet driver hardcodes the mapping between
interface/port and IPD port number. Since we have generic helpers for
the very same purpose, we might as well use them instead. This prevents
having the same information in multiple places.

Signed-off-by: Janne Huttunen <janne.huttunen@nokia.com>
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Janne Huttunen <janne.huttunen@nokia.com>
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org
Patchwork: https://patchwork.linux-mips.org/patch/10975/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/drivers/staging/octeon/ethernet-util.h b/drivers/staging/octeon/ethernet-util.h
index 1ba789a..45f024b 100644
--- a/drivers/staging/octeon/ethernet-util.h
+++ b/drivers/staging/octeon/ethernet-util.h
@@ -8,6 +8,10 @@
  * published by the Free Software Foundation.
  */
 
+#include <asm/octeon/cvmx-pip.h>
+#include <asm/octeon/cvmx-helper.h>
+#include <asm/octeon/cvmx-helper-util.h>
+
 /**
  * cvm_oct_get_buffer_ptr - convert packet data address to pointer
  * @packet_ptr: Packet data hardware address
@@ -28,14 +32,12 @@ static inline void *cvm_oct_get_buffer_ptr(union cvmx_buf_ptr packet_ptr)
  */
 static inline int INTERFACE(int ipd_port)
 {
-	if (ipd_port < 32)	/* Interface 0 or 1 for RGMII,GMII,SPI, etc */
-		return ipd_port >> 4;
-	else if (ipd_port < 36)	/* Interface 2 for NPI */
-		return 2;
-	else if (ipd_port < 40)	/* Interface 3 for loopback */
-		return 3;
-	else if (ipd_port == 40)	/* Non existent interface for POW0 */
-		return 4;
+	int interface = cvmx_helper_get_interface_num(ipd_port);
+
+	if (interface >= 0)
+		return interface;
+	else if (ipd_port == CVMX_PIP_NUM_INPUT_PORTS)
+		return 10;
 	panic("Illegal ipd_port %d passed to INTERFACE\n", ipd_port);
 }
 
@@ -47,7 +49,5 @@ static inline int INTERFACE(int ipd_port)
  */
 static inline int INDEX(int ipd_port)
 {
-	if (ipd_port < 32)
-		return ipd_port & 15;
-	return ipd_port & 3;
+	return cvmx_helper_get_interface_index_num(ipd_port);
 }
-- 
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