From 5f3347e6e75768985a088d959c49fb66263087b6 Mon Sep 17 00:00:00 2001 From: Yaniv Rosner Date: Thu, 7 Mar 2013 13:27:33 +0000 Subject: bnx2x: Fix intermittent long KR2 link up time When a KR2 device is connected to a KR link-partner, sometimes it requires disabling KR2 for the link to come up. To get a KR2 link up later, in case no base pages are seen, the KR2 is restored. The problem was that some link partners cleared their advertised BP/NP after around two seconds, causing the driver to disable/enable KR2 link all the time. The fix was to wait at least 5 seconds before checking KR2 recovery. Signed-off-by: Yaniv Rosner Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c | 11 +++++++++++ drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h | 3 ++- 2 files changed, 13 insertions(+), 1 deletion(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c index 31c5787970db..00ac4932f4c4 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c @@ -12527,6 +12527,7 @@ int bnx2x_phy_init(struct link_params *params, struct link_vars *vars) vars->flow_ctrl = BNX2X_FLOW_CTRL_NONE; vars->mac_type = MAC_TYPE_NONE; vars->phy_flags = 0; + vars->check_kr2_recovery_cnt = 0; /* Driver opens NIG-BRB filters */ bnx2x_set_rx_filter(params, 1); /* Check if link flap can be avoided */ @@ -13411,6 +13412,7 @@ static void bnx2x_disable_kr2(struct link_params *params, vars->link_attr_sync &= ~LINK_ATTR_SYNC_KR2_ENABLE; bnx2x_update_link_attr(params, vars->link_attr_sync); + vars->check_kr2_recovery_cnt = CHECK_KR2_RECOVERY_CNT; /* Restart AN on leading lane */ bnx2x_warpcore_restart_AN_KR(phy, params); } @@ -13439,6 +13441,15 @@ static void bnx2x_check_kr2_wa(struct link_params *params, return; } + /* Once KR2 was disabled, wait 5 seconds before checking KR2 recovery + * since some switches tend to reinit the AN process and clear the + * advertised BP/NP after ~2 seconds causing the KR2 to be disabled + * and recovered many times + */ + if (vars->check_kr2_recovery_cnt > 0) { + vars->check_kr2_recovery_cnt--; + return; + } lane = bnx2x_get_warpcore_lane(phy, params); CL22_WR_OVER_CL45(bp, phy, MDIO_REG_BANK_AER_BLOCK, MDIO_AER_BLOCK_AER_REG, lane); diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h index be5c195d03dd..f92fcf71be04 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h @@ -342,7 +342,8 @@ struct link_vars { u32 link_status; u32 eee_status; u8 fault_detected; - u8 rsrv1; + u8 check_kr2_recovery_cnt; +#define CHECK_KR2_RECOVERY_CNT 5 u16 periodic_flags; #define PERIODIC_FLAGS_LINK_EVENT 0x0001 -- cgit v1.2.3