From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenzhuo Lu Subject: [PATCH 25/34] e1000/base: set correct value of beacon duration Date: Wed, 14 Oct 2015 14:34:30 +0800 Message-ID: <1444804479-14840-26-git-send-email-wenzhuo.lu@intel.com> References: <1444804479-14840-1-git-send-email-wenzhuo.lu@intel.com> To: dev@dpdk.org Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 7D45F9221 for ; Wed, 14 Oct 2015 08:35:45 +0200 (CEST) In-Reply-To: <1444804479-14840-1-git-send-email-wenzhuo.lu@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Fix for I217 Packet Loss issue - The Management Engine sets the FEXTNVM4 Beacon Duration incorrectly. This fix ensures that the correct value will always be set. Correct value for this field is 8 usec. Signed-off-by: Wenzhuo Lu --- drivers/net/e1000/base/e1000_ich8lan.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/net/e1000/base/e1000_ich8lan.c b/drivers/net/e1000/base/e1000_ich8lan.c index 56e20b4..7b7c631 100644 --- a/drivers/net/e1000/base/e1000_ich8lan.c +++ b/drivers/net/e1000/base/e1000_ich8lan.c @@ -1483,6 +1483,20 @@ STATIC s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw) return ret_val; } + /* I217 Packet Loss issue: + * ensure that FEXTNVM4 Beacon Duration is set correctly + * on power up. + * Set the Beacon Duration for I217 to 8 usec + */ + if (hw->mac.type == e1000_pch_lpt) { + u32 mac_reg; + + mac_reg = E1000_READ_REG(hw, E1000_FEXTNVM4); + mac_reg &= ~E1000_FEXTNVM4_BEACON_DURATION_MASK; + mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_8USEC; + E1000_WRITE_REG(hw, E1000_FEXTNVM4, mac_reg); + } + /* Work-around I218 hang issue */ if ((hw->device_id == E1000_DEV_ID_PCH_LPTLP_I218_LM) || (hw->device_id == E1000_DEV_ID_PCH_LPTLP_I218_V) || -- 1.9.3