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Message-ID: <20080612003219.12670.66981.stgit@vitb-lp>
Date: Thu, 12 Jun 2008 04:32:19 +0400
From: Vitaly Bordug <vitb@...nel.crashing.org>
To: jeff@...zik.org
Cc: linuxppc-dev@...abs.org, netdev@...r.kernel.org
Subject: [PATCH] [fs_enet] powerpc: Fix SCC Ethernet on CPM2,
and crash in fs_enet_rx_napi()
From: Heiko Schocher <hs@...x.de>
Initially posted on:
http://ozlabs.org/pipermail/linuxppc-dev/2008-January/049682.html
Feedback is addressed in this version (yes, this patch was floating around for a while...)
Signed-off-by: Heiko Schocher <hs@...x.de>
Signed-off-by: Vitaly Bordug <vitb@...nel.crashing.org>
---
drivers/net/fs_enet/fs_enet-main.c | 10 +++++++++-
drivers/net/fs_enet/mac-scc.c | 8 +++++++-
include/asm-powerpc/cpm2.h | 5 +++++
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index a5baaf5..31c9693 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -804,6 +804,10 @@ static int fs_enet_open(struct net_device *dev)
int r;
int err;
+ /* to initialize the fep->cur_rx,... */
+ /* not doing this, will cause a crash in fs_enet_rx_napi */
+ fs_init_bds(fep->ndev);
+
if (fep->fpi->use_napi)
napi_enable(&fep->napi);
@@ -982,6 +986,7 @@ static struct net_device *fs_init_instance(struct device *dev,
fep = netdev_priv(ndev);
fep->dev = dev;
+ fep->ndev = ndev;
dev_set_drvdata(dev, ndev);
fep->fpi = fpi;
if (fpi->init_ioports)
@@ -1085,7 +1090,6 @@ static struct net_device *fs_init_instance(struct device *dev,
}
registered = 1;
-
return ndev;
err:
@@ -1354,6 +1358,10 @@ static struct of_device_id fs_enet_match[] = {
.compatible = "fsl,cpm1-scc-enet",
.data = (void *)&fs_scc_ops,
},
+ {
+ .compatible = "fsl,cpm2-scc-enet",
+ .data = (void *)&fs_scc_ops,
+ },
#endif
#ifdef CONFIG_FS_ENET_HAS_FCC
{
diff --git a/drivers/net/fs_enet/mac-scc.c b/drivers/net/fs_enet/mac-scc.c
index d7ca319..f2b64a7 100644
--- a/drivers/net/fs_enet/mac-scc.c
+++ b/drivers/net/fs_enet/mac-scc.c
@@ -50,7 +50,6 @@
#include "fs_enet.h"
/*************************************************/
-
#if defined(CONFIG_CPM1)
/* for a 8xx __raw_xxx's are sufficient */
#define __fs_out32(addr, x) __raw_writel(x, addr)
@@ -65,6 +64,8 @@
#define __fs_out16(addr, x) out_be16(addr, x)
#define __fs_in32(addr) in_be32(addr)
#define __fs_in16(addr) in_be16(addr)
+#define __fs_out8(addr, x) out_8(addr, x)
+#define __fs_in8(addr) in_8(addr)
#endif
/* write, read, set bits, clear bits */
@@ -297,8 +298,13 @@ static void restart(struct net_device *dev)
/* Initialize function code registers for big-endian.
*/
+#ifndef CONFIG_NOT_COHERENT_CACHE
+ W8(ep, sen_genscc.scc_rfcr, SCC_EB | SCC_GBL);
+ W8(ep, sen_genscc.scc_tfcr, SCC_EB | SCC_GBL);
+#else
W8(ep, sen_genscc.scc_rfcr, SCC_EB);
W8(ep, sen_genscc.scc_tfcr, SCC_EB);
+#endif
/* Set maximum bytes per receive buffer.
* This appears to be an Ethernet frame size, not the buffer
diff --git a/include/asm-powerpc/cpm2.h b/include/asm-powerpc/cpm2.h
index 4c85ed9..3bdff75 100644
--- a/include/asm-powerpc/cpm2.h
+++ b/include/asm-powerpc/cpm2.h
@@ -343,6 +343,11 @@ typedef struct scc_param {
uint scc_tcrc; /* Internal */
} sccp_t;
+/* Function code bits.
+*/
+#define SCC_EB ((u_char) 0x10) /* Set big endian byte order */
+#define SCC_GBL ((u_char) 0x20) /* Snooping enabled */
+
/* CPM Ethernet through SCC1.
*/
typedef struct scc_enet {
--
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