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Date: Mon, 12 Jul 2010 04:04:10 -0700
From: Brandon Philips <brandon@...p.org>
To: Stephen Hemminger <shemminger@...ux-foundation.org>
Cc: netdev@...r.kernel.org, davem@...emloft.net,
Mike McCormack <mikem@...g3k.org>
Subject: Re: [PATCH] sky2: enable rx/tx in sky2_phy_reinit()
On 10:00 Wed 23 Jun 2010, Brandon Philips wrote:
> While testing this I just noticed that if I turn off speed autoneg the
> interface stops sending packets until I turn off pause autoneg too.
>
> To illustrate start pinging some machine and run this:
>
> $ ethtool --change eth0 speed 100 duplex full autoneg off
> # At this point the ping stops
>
> $ ethtool -A eth0 autoneg off
> # Ping starts up again
>
> When I tried capturing packets nothing was coming from the device.
>
> 0ea065e52eb6a0f029b5fa5ed2f142be1b66a153 implemeneted the behaviour of
> having seperate pause and speed ethtool controls for sky2. Reverting
> this (see quick ugly revert below) obviously fixes the issue.
>
> Any ideas on how to fix this in a proper way though?
Hello Stephen-
Any ideas on how to fix this properly?
Thanks,
Brandon
> From 8de50faa1911933dc545f663a24f32d0caeea3b4 Mon Sep 17 00:00:00 2001
> From: Brandon Philips <brandon@...p.org>
> Date: Wed, 23 Jun 2010 09:56:20 -0700
> Subject: [PATCH] sky2: revert "fix pause negotiation"
>
> Revert 0ea065e52eb6a0f029b5fa5ed2f142be1b66a153
> ---
> drivers/net/sky2.c | 31 ++++++++++++-------------------
> drivers/net/sky2.h | 2 ++
> 2 files changed, 14 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
> index 7985165..a638171 100644
> --- a/drivers/net/sky2.c
> +++ b/drivers/net/sky2.c
> @@ -333,7 +333,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> struct sky2_port *sky2 = netdev_priv(hw->dev[port]);
> u16 ctrl, ct1000, adv, pg, ledctrl, ledover, reg;
>
> - if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED) &&
> + if (sky2->autoneg == AUTONEG_ENABLE &&
> !(hw->flags & SKY2_HW_NEWER_PHY)) {
> u16 ectrl = gm_phy_read(hw, port, PHY_MARV_EXT_CTRL);
>
> @@ -375,7 +375,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> ctrl |= PHY_M_PC_MDI_XMODE(PHY_M_PC_ENA_AUTO);
>
> /* downshift on PHY 88E1112 and 88E1149 is changed */
> - if ( (sky2->flags & SKY2_FLAG_AUTO_SPEED) &&
> + if (sky2->autoneg == AUTONEG_ENABLE &&
> (hw->flags & SKY2_HW_NEWER_PHY)) {
> /* set downshift counter to 3x and enable downshift */
> ctrl &= ~PHY_M_PC_DSC_MSK;
> @@ -420,7 +420,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> adv = PHY_AN_CSMA;
> reg = 0;
>
> - if (sky2->flags & SKY2_FLAG_AUTO_SPEED) {
> + if (sky2->autoneg == AUTONEG_ENABLE) {
> if (sky2_is_copper(hw)) {
> if (sky2->advertising & ADVERTISED_1000baseT_Full)
> ct1000 |= PHY_M_1000C_AFD;
> @@ -435,11 +435,14 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> if (sky2->advertising & ADVERTISED_10baseT_Half)
> adv |= PHY_M_AN_10_HD;
>
> + adv |= copper_fc_adv[sky2->flow_mode];
> } else { /* special defines for FIBER (88E1040S only) */
> if (sky2->advertising & ADVERTISED_1000baseT_Full)
> adv |= PHY_M_AN_1000X_AFD;
> if (sky2->advertising & ADVERTISED_1000baseT_Half)
> adv |= PHY_M_AN_1000X_AHD;
> +
> + adv |= fiber_fc_adv[sky2->flow_mode];
> }
>
> /* Restart Auto-negotiation */
> @@ -448,8 +451,8 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> /* forced speed/duplex settings */
> ct1000 = PHY_M_1000C_MSE;
>
> - /* Disable auto update for duplex flow control and duplex */
> - reg |= GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_SPD_DIS;
> + /* Disable auto update for duplex flow control and speed */
> + reg |= GM_GPCR_AU_ALL_DIS;
>
> switch (sky2->speed) {
> case SPEED_1000:
> @@ -467,15 +470,8 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> ctrl |= PHY_CT_DUP_MD;
> } else if (sky2->speed < SPEED_1000)
> sky2->flow_mode = FC_NONE;
> - }
>
> - if (sky2->flags & SKY2_FLAG_AUTO_PAUSE) {
> - if (sky2_is_copper(hw))
> - adv |= copper_fc_adv[sky2->flow_mode];
> - else
> - adv |= fiber_fc_adv[sky2->flow_mode];
> - } else {
> - reg |= GM_GPCR_AU_FCT_DIS;
> +
> reg |= gm_fc_disable[sky2->flow_mode];
>
> /* Forward pause packets to GMAC? */
> @@ -620,8 +616,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> /* no effect on Yukon-XL */
> gm_phy_write(hw, port, PHY_MARV_LED_CTRL, ledctrl);
>
> - if (!(sky2->flags & SKY2_FLAG_AUTO_SPEED) ||
> - sky2->speed == SPEED_100) {
> + if (sky2->autoneg == AUTONEG_DISABLE || sky2->speed == SPEED_100) {
> /* turn on 100 Mbps LED (LED_LINK100) */
> ledover |= PHY_M_LED_MO_100(MO_LED_ON);
> }
> @@ -632,7 +627,7 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
> }
>
> /* Enable phy interrupt on auto-negotiation complete (or link up) */
> - if (sky2->flags & SKY2_FLAG_AUTO_SPEED)
> + if (sky2->autoneg == AUTONEG_ENABLE)
> gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_IS_AN_COMPL);
> else
> gm_phy_write(hw, port, PHY_MARV_INT_MASK, PHY_M_DEF_MSK);
> @@ -688,9 +683,7 @@ static void sky2_phy_power_down(struct sky2_hw *hw, unsigned port)
>
> /* setup General Purpose Control Register */
> gma_write16(hw, port, GM_GP_CTRL,
> - GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 |
> - GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_FCT_DIS |
> - GM_GPCR_AU_SPD_DIS);
> + GM_GPCR_FL_PASS | GM_GPCR_SPEED_100 | GM_GPCR_AU_ALL_DIS);
>
> if (hw->chip_id != CHIP_ID_YUKON_EC) {
> if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
> diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
> index 084eff2..db0b2ad 100644
> --- a/drivers/net/sky2.h
> +++ b/drivers/net/sky2.h
> @@ -1755,6 +1755,7 @@ enum {
> };
>
> #define GM_GPCR_SPEED_1000 (GM_GPCR_GIGS_ENA | GM_GPCR_SPEED_100)
> +#define GM_GPCR_AU_ALL_DIS (GM_GPCR_AU_DUP_DIS | GM_GPCR_AU_FCT_DIS|GM_GPCR_AU_SPD_DIS)
>
> /* GM_TX_CTRL 16 bit r/w Transmit Control Register */
> enum {
> @@ -2247,6 +2248,7 @@ struct sky2_port {
> u16 speed; /* SPEED_1000, SPEED_100, ... */
> u8 wol; /* WAKE_ bits */
> u8 duplex; /* DUPLEX_HALF, DUPLEX_FULL */
> + u8 autoneg; /* AUTONEG_ENABLE, AUTONEG_DISABLE */
> u16 flags;
> #define SKY2_FLAG_RX_CHECKSUM 0x0001
> #define SKY2_FLAG_AUTO_SPEED 0x0002
> --
> 1.7.1
>
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