netdev - RE: [PATCH] net: fec: add necessary defines to work on ARM64

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Date:   Thu, 18 Jan 2018 01:49:49 +0000
From:   Andy Duan <fugang.duan@....com>
To:     Lucas Stach <l.stach@...gutronix.de>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "patchwork-lst@...gutronix.de" <patchwork-lst@...gutronix.de>
Subject: RE: [PATCH] net: fec: add necessary defines to work on ARM64

From: Lucas Stach <l.stach@...gutronix.de> Sent: Thursday, January 18, 2018 2:31 AM
>The i.MX8 is a ARMv8 based SoC, that uses the same FEC IP as the earlier,
>ARMv7 based, i.MX SoCs. Allow the driver to work on ARM64.
>
>Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
>---
> drivers/net/ethernet/freescale/fec.h      | 5 +++--
> drivers/net/ethernet/freescale/fec_main.c | 8 +++++---
> 2 files changed, 8 insertions(+), 5 deletions(-)
>
>diff --git a/drivers/net/ethernet/freescale/fec.h
>b/drivers/net/ethernet/freescale/fec.h
>index 5385074b3b7d..e7381f8ef89d 100644
>--- a/drivers/net/ethernet/freescale/fec.h
>+++ b/drivers/net/ethernet/freescale/fec.h
>@@ -20,7 +20,8 @@
> #include <linux/timecounter.h>
>
> #if defined(CONFIG_M523x) || defined(CONFIG_M527x) ||
>defined(CONFIG_M528x) || \
>-    defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM)
>+    defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM) || \
>+    defined(CONFIG_ARM64)
> /*
>  *	Just figures, Motorola would have to change the offsets for
>  *	registers in the same peripheral device on different models
>@@ -195,7 +196,7 @@
>  *	Evidently, ARM SoCs have the FEC block generated in a
>  *	little endian mode so adjust endianness accordingly.
>  */
>-#if defined(CONFIG_ARM)
>+#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
> #define fec32_to_cpu le32_to_cpu
> #define fec16_to_cpu le16_to_cpu
> #define cpu_to_fec32 cpu_to_le32
>diff --git a/drivers/net/ethernet/freescale/fec_main.c
>b/drivers/net/ethernet/freescale/fec_main.c
>index a74300a4459c..45eed37373a9 100644
>--- a/drivers/net/ethernet/freescale/fec_main.c
>+++ b/drivers/net/ethernet/freescale/fec_main.c
>@@ -195,7 +195,8 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC
>address");
>  * account when setting it.
>  */
> #if defined(CONFIG_M523x) || defined(CONFIG_M527x) ||
>defined(CONFIG_M528x) || \
>-    defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM)
>+    defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM) || \
>+    defined(CONFIG_ARM64)
> #define	OPT_FRAME_SIZE	(PKT_MAXBUF_SIZE << 16)
> #else
> #define	OPT_FRAME_SIZE	0
>@@ -2107,7 +2108,8 @@ static int fec_enet_get_regs_len(struct net_device
>*ndev)
>
> /* List of registers that can be safety be read to dump them with ethtool */
>#if defined(CONFIG_M523x) || defined(CONFIG_M527x) ||
>defined(CONFIG_M528x) || \
>-	defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM)
>+	defined(CONFIG_M520x) || defined(CONFIG_M532x) ||
>defined(CONFIG_ARM) || \
>+	defined(CONFIG_ARM64)
> static u32 fec_enet_register_offset[] = {
> 	FEC_IEVENT, FEC_IMASK, FEC_R_DES_ACTIVE_0,
>FEC_X_DES_ACTIVE_0,
> 	FEC_ECNTRL, FEC_MII_DATA, FEC_MII_SPEED, FEC_MIB_CTRLSTAT,
>FEC_R_CNTRL, @@ -3119,7 +3121,7 @@ static int fec_enet_init(struct
>net_device *ndev)
> 	unsigned dsize_log2 = __fls(dsize);
>
> 	WARN_ON(dsize != (1 << dsize_log2));
>-#if defined(CONFIG_ARM)
>+#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
> 	fep->rx_align = 0xf;
> 	fep->tx_align = 0xf;
> #else
>--
>2.11.0

Kconfig also need to add ARM64 support.