[dpdk-stable] patch 'net/i40e: fix VF initialization error' has been queued to stable release 17.08.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.08.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/24/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From d43e926baec2ff48caa5eb2c6e6f528d8b327e12 Mon Sep 17 00:00:00 2001
From: Jingjing Wu <jingjing.wu at intel.com>
Date: Tue, 10 Oct 2017 06:08:30 +0800
Subject: [PATCH] net/i40e: fix VF initialization error

[ upstream commit 8cacf78469a78b42557895ad1c2b40fbee864f53 ]

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")

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
 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 6933cc2..616829a 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1241,10 +1241,30 @@ 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;
@@ -1260,19 +1280,10 @@ 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;
@@ -1295,6 +1306,10 @@ 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) {
@@ -1319,6 +1334,7 @@ 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