From 39dbd9587bebedbd72be9a8a30a8c4783f3ef7eb Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 4 Feb 2008 19:45:13 -0800 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 Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 17 +++++++---------- drivers/net/sky2.h | 2 +- 2 files changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index dc062367a1c8..9a6295909e43 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -857,7 +857,7 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port) 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); @@ -1194,7 +1194,7 @@ static struct sk_buff *sky2_rx_alloc(struct sky2_port *sky2) 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 @@ -1387,6 +1387,7 @@ static int sky2_up(struct net_device *dev) 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; @@ -2026,7 +2027,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu) 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); @@ -2566,7 +2567,7 @@ static void sky2_watchdog(unsigned long arg) ++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); @@ -2722,11 +2723,7 @@ static int __devinit sky2_init(struct sky2_hw *hw) 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: @@ -2752,7 +2749,7 @@ static int __devinit sky2_init(struct sky2_hw *hw) 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: diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h index 2bced1a0898f..5ab5c1c7c5aa 100644 --- a/drivers/net/sky2.h +++ b/drivers/net/sky2.h @@ -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 */ -- GitLab