Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758242AbaJIVdy (ORCPT ); Thu, 9 Oct 2014 17:33:54 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:59264 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757472AbaJIVIl (ORCPT ); Thu, 9 Oct 2014 17:08:41 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Yaniv Rosner , Yuval Mintz , Ariel Elior , "David S. Miller" , Leann Ogasawara , Brad Figg , Kamal Mostafa Subject: [PATCH 3.13 116/163] bnx2x: Fix link for KR with swapped polarity lane Date: Thu, 9 Oct 2014 14:02:21 -0700 Message-Id: <1412888588-26755-117-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412888588-26755-1-git-send-email-kamal@canonical.com> References: <1412888588-26755-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.9 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Yaniv Rosner commit dad91ee478c7f39e04a33272732147b8c274bb58 upstream. This avoids clearing the RX polarity setting in KR mode when polarity lane is swapped, as otherwise this will result in failed link. Signed-off-by: Yaniv Rosner Signed-off-by: Yuval Mintz Signed-off-by: Ariel Elior Signed-off-by: David S. Miller Cc: Leann Ogasawara Cc: Brad Figg Signed-off-by: Kamal Mostafa --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c | 25 ++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c index 11fc795..26bb478 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c @@ -3749,7 +3749,8 @@ static void bnx2x_warpcore_restart_AN_KR(struct bnx2x_phy *phy, static void bnx2x_warpcore_enable_AN_KR(struct bnx2x_phy *phy, struct link_params *params, struct link_vars *vars) { - u16 lane, i, cl72_ctrl, an_adv = 0; + u16 lane, i, cl72_ctrl, an_adv = 0, val; + u32 wc_lane_config; struct bnx2x *bp = params->bp; static struct bnx2x_reg_set reg_set[] = { {MDIO_WC_DEVAD, MDIO_WC_REG_SERDESDIGITAL_CONTROL1000X2, 0x7}, @@ -3868,15 +3869,27 @@ static void bnx2x_warpcore_enable_AN_KR(struct bnx2x_phy *phy, /* Enable Auto-Detect to support 1G over CL37 as well */ bnx2x_cl45_write(bp, phy, MDIO_WC_DEVAD, MDIO_WC_REG_SERDESDIGITAL_CONTROL1000X1, 0x10); - + wc_lane_config = REG_RD(bp, params->shmem_base + + offsetof(struct shmem_region, dev_info. + shared_hw_config.wc_lane_config)); + bnx2x_cl45_read(bp, phy, MDIO_WC_DEVAD, + MDIO_WC_REG_RX0_PCI_CTRL + (lane << 4), &val); /* Force cl48 sync_status LOW to avoid getting stuck in CL73 * parallel-detect loop when CL73 and CL37 are enabled. */ - CL22_WR_OVER_CL45(bp, phy, MDIO_REG_BANK_AER_BLOCK, - MDIO_AER_BLOCK_AER_REG, 0); + val |= 1 << 11; + + /* Restore Polarity settings in case it was run over by + * previous link owner + */ + if (wc_lane_config & + (SHARED_HW_CFG_RX_LANE0_POL_FLIP_ENABLED << lane)) + val |= 3 << 2; + else + val &= ~(3 << 2); bnx2x_cl45_write(bp, phy, MDIO_WC_DEVAD, - MDIO_WC_REG_RXB_ANA_RX_CONTROL_PCI, 0x0800); - bnx2x_set_aer_mmd(params, phy); + MDIO_WC_REG_RX0_PCI_CTRL + (lane << 4), + val); bnx2x_disable_kr2(params, vars, phy); } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/