From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <jingjing.wu@intel.com>
Received: from mga02.intel.com (mga02.intel.com [134.134.136.20])
 by dpdk.org (Postfix) with ESMTP id AED7A1B22F;
 Tue, 10 Oct 2017 07:26:57 +0200 (CEST)
Received: from orsmga002.jf.intel.com ([10.7.209.21])
 by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;
 09 Oct 2017 22:26:55 -0700
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.42,503,1500966000"; d="scan'208";a="144687650"
Received: from unknown (HELO dpdk11.sh.intel.com) ([10.67.110.198])
 by orsmga002.jf.intel.com with ESMTP; 09 Oct 2017 22:26:53 -0700
From: Jingjing Wu <jingjing.wu@intel.com>
To: beilei.xing@intel.com
Cc: dev@dpdk.org,
	jingjing.wu@intel.com,
	stable@dpdk.org
Date: Tue, 10 Oct 2017 06:08:30 +0800
Message-Id: <1507586910-35458-1-git-send-email-jingjing.wu@intel.com>
X-Mailer: git-send-email 2.7.4
In-Reply-To: <1507581083-33667-1-git-send-email-jingjing.wu@intel.com>
References: <1507581083-33667-1-git-send-email-jingjing.wu@intel.com>
Subject: [dpdk-stable] [PATCH v2 1/2] net/i40e: fix VF initialization error
X-BeenThere: stable@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches for DPDK stable branches <stable.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/stable>,
 <mailto:stable-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/stable/>
List-Post: <mailto:stable@dpdk.org>
List-Help: <mailto:stable-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/stable>,
 <mailto:stable-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Tue, 10 Oct 2017 05:26:58 -0000

In igb_uio, FLR is issued during open device file. i40evf is trying
to initialize admin queue when driver probe, while the FLR is not
done by host driver. That will cause initialization fail.

This patch is adding the checking if VF reset is done before
adimin queue initialization.

Fixes: b58eedfc7dd5 ("igb_uio: issue FLR during open and release of device file")

Cc: stable@dpdk.org
Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
---
V2 change:
 remove useless code.

 drivers/net/i40e/i40e_ethdev_vf.c | 44 ++++++++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 14 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 111ac39..64e771c 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1111,10 +1111,30 @@ i40evf_enable_irq0(struct i40e_hw *hw)
 }
 
 static int
-i40evf_reset_vf(struct i40e_hw *hw)
+i40evf_check_vf_reset_done(struct i40e_hw *hw)
 {
 	int i, reset;
 
+	for (i = 0; i < MAX_RESET_WAIT_CNT; i++) {
+		reset = I40E_READ_REG(hw, I40E_VFGEN_RSTAT) &
+			I40E_VFGEN_RSTAT_VFR_STATE_MASK;
+		reset = reset >> I40E_VFGEN_RSTAT_VFR_STATE_SHIFT;
+		if (reset == VIRTCHNL_VFR_VFACTIVE ||
+		    reset == VIRTCHNL_VFR_COMPLETED)
+			break;
+		rte_delay_ms(50);
+	}
+
+	if (i >= MAX_RESET_WAIT_CNT)
+		return -1;
+
+	return 0;
+}
+static int
+i40evf_reset_vf(struct i40e_hw *hw)
+{
+	int ret;
+
 	if (i40e_vf_reset(hw) != I40E_SUCCESS) {
 		PMD_INIT_LOG(ERR, "Reset VF NIC failed");
 		return -1;
@@ -1130,19 +1150,10 @@ i40evf_reset_vf(struct i40e_hw *hw)
 	  */
 	rte_delay_ms(200);
 
-	for (i = 0; i < MAX_RESET_WAIT_CNT; i++) {
-		reset = rd32(hw, I40E_VFGEN_RSTAT) &
-			I40E_VFGEN_RSTAT_VFR_STATE_MASK;
-		reset = reset >> I40E_VFGEN_RSTAT_VFR_STATE_SHIFT;
-		if (VIRTCHNL_VFR_COMPLETED == reset || VIRTCHNL_VFR_VFACTIVE == reset)
-			break;
-		else
-			rte_delay_ms(50);
-	}
-
-	if (i >= MAX_RESET_WAIT_CNT) {
-		PMD_INIT_LOG(ERR, "Reset VF NIC failed");
-		return -1;
+	ret = i40evf_check_vf_reset_done(hw);
+	if (ret) {
+		PMD_INIT_LOG(ERR, "VF is still resetting");
+		return ret;
 	}
 
 	return 0;
@@ -1165,6 +1176,10 @@ i40evf_init_vf(struct rte_eth_dev *dev)
 		goto err;
 	}
 
+	err = i40evf_check_vf_reset_done(hw);
+	if (err)
+		goto err;
+
 	i40e_init_adminq_parameter(hw);
 	err = i40e_init_adminq(hw);
 	if (err) {
@@ -1189,6 +1204,7 @@ i40evf_init_vf(struct rte_eth_dev *dev)
 		PMD_INIT_LOG(ERR, "init_adminq failed");
 		goto err;
 	}
+
 	vf->aq_resp = rte_zmalloc("vf_aq_resp", I40E_AQ_BUF_SZ, 0);
 	if (!vf->aq_resp) {
 		PMD_INIT_LOG(ERR, "unable to allocate vf_aq_resp memory");
-- 
2.7.4