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Message-ID: <20080204194513.700f6387@extreme>
Date: Mon, 4 Feb 2008 19:45:13 -0800
From: Stephen Hemminger <shemminger@...ux-foundation.org>
To: Jeff Garzik <jgarzik@...ox.com>
Cc: Petr Vandrovec <petr@...drovec.name>, netdev@...r.kernel.org
Subject: [PATCH] sky2: fix for Yukon FE (regression in 2.6.25)
The Yukon FE chip has a ram buffer therefore it needs the alignment
restriction and hang check workarounds.
Therefore:
* Autodetect the prescence/absence of ram buffer
* Rename the flag value to reflect this
* Use it consistently (ie don't reread register)
Signed-off-by: Stephen Hemminger <shemminger@...ux-foundation.org>
--- a/drivers/net/sky2.c 2008-02-03 10:20:43.000000000 -0800
+++ b/drivers/net/sky2.c 2008-02-03 10:32:25.000000000 -0800
@@ -855,7 +855,7 @@ static void sky2_mac_init(struct sky2_hw
sky2_write16(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_OPER_ON);
/* On chips without ram buffer, pause is controled by MAC level */
- if (sky2_read8(hw, B2_E_0) == 0) {
+ if (!(hw->flags & SKY2_HW_RAM_BUFFER)) {
sky2_write8(hw, SK_REG(port, RX_GMF_LP_THR), 768/8);
sky2_write8(hw, SK_REG(port, RX_GMF_UP_THR), 1024/8);
@@ -1192,7 +1192,7 @@ static struct sk_buff *sky2_rx_alloc(str
struct sk_buff *skb;
int i;
- if (sky2->hw->flags & SKY2_HW_FIFO_HANG_CHECK) {
+ if (sky2->hw->flags & SKY2_HW_RAM_BUFFER) {
unsigned char *start;
/*
* Workaround for a bug in FIFO that cause hang
@@ -1385,6 +1385,7 @@ static int sky2_up(struct net_device *de
if (ramsize > 0) {
u32 rxspace;
+ hw->flags |= SKY2_HW_RAM_BUFFER;
pr_debug(PFX "%s: ram buffer %dK\n", dev->name, ramsize);
if (ramsize < 16)
rxspace = ramsize / 2;
@@ -2023,7 +2024,7 @@ static int sky2_change_mtu(struct net_de
synchronize_irq(hw->pdev->irq);
- if (sky2_read8(hw, B2_E_0) == 0)
+ if (!(hw->flags & SKY2_HW_RAM_BUFFER))
sky2_set_tx_stfwd(hw, port);
ctl = gma_read16(hw, port, GM_GP_CTRL);
@@ -2559,7 +2560,7 @@ static void sky2_watchdog(unsigned long
++active;
/* For chips with Rx FIFO, check if stuck */
- if ((hw->flags & SKY2_HW_FIFO_HANG_CHECK) &&
+ if ((hw->flags & SKY2_HW_RAM_BUFFER) &&
sky2_rx_hung(dev)) {
pr_info(PFX "%s: receiver hang detected\n",
dev->name);
@@ -2715,11 +2716,7 @@ static int __devinit sky2_init(struct sk
switch(hw->chip_id) {
case CHIP_ID_YUKON_XL:
- hw->flags = SKY2_HW_GIGABIT
- | SKY2_HW_NEWER_PHY;
- if (hw->chip_rev < 3)
- hw->flags |= SKY2_HW_FIFO_HANG_CHECK;
-
+ hw->flags = SKY2_HW_GIGABIT | SKY2_HW_NEWER_PHY;
break;
case CHIP_ID_YUKON_EC_U:
@@ -2745,7 +2742,7 @@ static int __devinit sky2_init(struct sk
dev_err(&hw->pdev->dev, "unsupported revision Yukon-EC rev A1\n");
return -EOPNOTSUPP;
}
- hw->flags = SKY2_HW_GIGABIT | SKY2_HW_FIFO_HANG_CHECK;
+ hw->flags = SKY2_HW_GIGABIT;
break;
case CHIP_ID_YUKON_FE:
--- a/drivers/net/sky2.h 2008-02-03 10:20:43.000000000 -0800
+++ b/drivers/net/sky2.h 2008-02-03 10:26:45.000000000 -0800
@@ -2045,7 +2045,7 @@ struct sky2_hw {
#define SKY2_HW_FIBRE_PHY 0x00000002
#define SKY2_HW_GIGABIT 0x00000004
#define SKY2_HW_NEWER_PHY 0x00000008
-#define SKY2_HW_FIFO_HANG_CHECK 0x00000010
+#define SKY2_HW_RAM_BUFFER 0x00000010
#define SKY2_HW_NEW_LE 0x00000020 /* new LSOv2 format */
#define SKY2_HW_AUTO_TX_SUM 0x00000040 /* new IP decode for Tx */
#define SKY2_HW_ADV_POWER_CTL 0x00000080 /* additional PHY power regs */
--
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