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Date: Tue, 16 Dec 2008 17:20:59 -0600
From: Andy Fleming <afleming@...escale.com>
To: jeff@...zik.org
Cc: galak@...nel.crashing.org, netdev@...r.kernel.org,
Haruki Dai <Dai.Haruki@...escale.com>,
Dai Haruki <dai.haruki@...escale.com>
Subject: [PATCH v2.6.29 06/14] gianfar: Fix VLAN HW feature related frame/buffer size calculation.
From: Haruki Dai <Dai.Haruki@...escale.com>
Optimize the VLAN checking logic as well.
Signed-off-by: Dai Haruki <dai.haruki@...escale.com>
Acked-by: Andy Fleming <afleming@...escale.com>
---
drivers/net/gianfar.c | 36 +++++++++++++++++++++---------------
drivers/net/gianfar.h | 9 +++++----
2 files changed, 26 insertions(+), 19 deletions(-)
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index aac9915..c40ba18 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -149,7 +149,7 @@ MODULE_LICENSE("GPL");
/* Returns 1 if incoming frames use an FCB */
static inline int gfar_uses_fcb(struct gfar_private *priv)
{
- return (priv->vlan_enable || priv->rx_csum_enable);
+ return priv->vlgrp || priv->rx_csum_enable;
}
static int gfar_of_init(struct net_device *dev)
@@ -376,8 +376,6 @@ static int gfar_probe(struct of_device *ofdev,
dev->vlan_rx_register = gfar_vlan_rx_register;
dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
-
- priv->vlan_enable = 1;
}
if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
@@ -1078,9 +1076,6 @@ int startup_gfar(struct net_device *dev)
rctrl |= RCTRL_EMEN;
}
- if (priv->vlan_enable)
- rctrl |= RCTRL_VLAN;
-
if (priv->padding) {
rctrl &= ~RCTRL_PAL_MASK;
rctrl |= RCTRL_PADDING(priv->padding);
@@ -1241,8 +1236,7 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
gfar_tx_checksum(skb, fcb);
}
- if (priv->vlan_enable &&
- unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) {
+ if (priv->vlgrp && vlan_tx_tag_present(skb)) {
if (unlikely(NULL == fcb)) {
fcb = gfar_add_fcb(skb, txbdp);
status |= TXBD_TOE;
@@ -1344,11 +1338,15 @@ static void gfar_vlan_rx_register(struct net_device *dev,
{
struct gfar_private *priv = netdev_priv(dev);
unsigned long flags;
+ struct vlan_group *old_grp;
u32 tempval;
spin_lock_irqsave(&priv->rxlock, flags);
- priv->vlgrp = grp;
+ old_grp = priv->vlgrp;
+
+ if (old_grp == grp)
+ return;
if (grp) {
/* Enable VLAN tag insertion */
@@ -1360,6 +1358,7 @@ static void gfar_vlan_rx_register(struct net_device *dev,
/* Enable VLAN tag extraction */
tempval = gfar_read(&priv->regs->rctrl);
tempval |= RCTRL_VLEX;
+ tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
gfar_write(&priv->regs->rctrl, tempval);
} else {
/* Disable VLAN tag insertion */
@@ -1370,9 +1369,16 @@ static void gfar_vlan_rx_register(struct net_device *dev,
/* Disable VLAN tag extraction */
tempval = gfar_read(&priv->regs->rctrl);
tempval &= ~RCTRL_VLEX;
+ /* If parse is no longer required, then disable parser */
+ if (tempval & RCTRL_REQ_PARSER)
+ tempval |= RCTRL_PRSDEP_INIT;
+ else
+ tempval &= ~RCTRL_PRSDEP_INIT;
gfar_write(&priv->regs->rctrl, tempval);
}
+ gfar_change_mtu(dev, dev->mtu);
+
spin_unlock_irqrestore(&priv->rxlock, flags);
}
@@ -1383,14 +1389,9 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu)
int oldsize = priv->rx_buffer_size;
int frame_size = new_mtu + ETH_HLEN;
- if (priv->vlan_enable)
+ if (priv->vlgrp)
frame_size += VLAN_HLEN;
- if (gfar_uses_fcb(priv))
- frame_size += GMAC_FCB_LEN;
-
- frame_size += priv->padding;
-
if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
if (netif_msg_drv(priv))
printk(KERN_ERR "%s: Invalid MTU setting\n",
@@ -1398,6 +1399,11 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu)
return -EINVAL;
}
+ if (gfar_uses_fcb(priv))
+ frame_size += GMAC_FCB_LEN;
+
+ frame_size += priv->padding;
+
tempsize =
(frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
INCREMENTAL_BUFFER_SIZE;
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 449f508..1bdb50c 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -206,8 +206,10 @@ extern const char gfar_driver_version[];
#define RCTRL_PRSDEP_INIT 0x000000c0
#define RCTRL_PROM 0x00000008
#define RCTRL_EMEN 0x00000002
-#define RCTRL_CHECKSUMMING (RCTRL_IPCSEN \
- | RCTRL_TUCSEN | RCTRL_PRSDEP_INIT)
+#define RCTRL_REQ_PARSER (RCTRL_VLEX | RCTRL_IPCSEN | \
+ RCTRL_TUCSEN)
+#define RCTRL_CHECKSUMMING (RCTRL_IPCSEN | RCTRL_TUCSEN | \
+ RCTRL_PRSDEP_INIT)
#define RCTRL_EXTHASH (RCTRL_GHTX)
#define RCTRL_VLAN (RCTRL_PRSDEP_INIT)
#define RCTRL_PADDING(x) ((x << 16) & RCTRL_PAL_MASK)
@@ -754,8 +756,7 @@ struct gfar_private {
phy_interface_t interface;
char phy_bus_id[BUS_ID_SIZE];
u32 device_flags;
- unsigned char vlan_enable:1,
- rx_csum_enable:1,
+ unsigned char rx_csum_enable:1,
extended_hash:1,
bd_stash_en:1,
wol_en:1; /* Wake-on-LAN enabled */
--
1.5.4.GIT
--
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