[dpdk-stable] patch 'net/ixgbe: fix overwriting RSS RETA' has been queued to stable release 18.11.1

[Kevin Traynor <ktraynor@redhat.com>]

Hi,

FYI, your patch has been queued to stable release 18.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 12/18/18. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Thanks.

Kevin Traynor

---
>From a465a6033cef15196d213a8d910865a5b959508e Mon Sep 17 00:00:00 2001
From: Xiaoyun Li <xiaoyun.li@intel.com>
Date: Tue, 4 Dec 2018 12:37:57 +0800
Subject: [PATCH] net/ixgbe: fix overwriting RSS RETA

[ upstream commit 8832837c6e64a75be31f32c49da261db15054c0d ]

When starting the device, the RSS table is initialized. So the RSS
update before device_start would be overwritten. This patch allows users
to update the RSS reta table before device_start.

Fixes: db5b65301dde ("ethdev: allow to set RSS hash computation flags and/or key")

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 11 +++++++++++
 drivers/net/ixgbe/ixgbe_ethdev.h |  3 +++
 drivers/net/ixgbe/ixgbe_rxtx.c   | 22 +++++++++++++---------
 3 files changed, 27 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 91ba6201d..749311048 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -2791,4 +2791,6 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
 {
 	struct rte_eth_link link;
+	struct ixgbe_adapter *adapter =
+		(struct ixgbe_adapter *)dev->data->dev_private;
 	struct ixgbe_hw *hw =
 		IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
@@ -2851,4 +2853,6 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
 	/* reset hierarchy commit */
 	tm_conf->committed = false;
+
+	adapter->rss_reta_updated = 0;
 }
 
@@ -4780,4 +4784,6 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
 	uint32_t reta, r;
 	uint16_t idx, shift;
+	struct ixgbe_adapter *adapter =
+		(struct ixgbe_adapter *)dev->data->dev_private;
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t reta_reg;
@@ -4821,4 +4827,5 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
 		IXGBE_WRITE_REG(hw, reta_reg, reta);
 	}
+	adapter->rss_reta_updated = 1;
 
 	return 0;
@@ -5144,4 +5151,6 @@ ixgbevf_dev_stop(struct rte_eth_dev *dev)
 {
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct ixgbe_adapter *adapter =
+		(struct ixgbe_adapter *)dev->data->dev_private;
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
 	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
@@ -5173,4 +5182,6 @@ ixgbevf_dev_stop(struct rte_eth_dev *dev)
 		intr_handle->intr_vec = NULL;
 	}
+
+	adapter->rss_reta_updated = 0;
 }
 
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index d0b93968b..565c69c9e 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -491,4 +491,7 @@ struct ixgbe_adapter {
 	struct rte_timecounter      tx_tstamp_tc;
  	struct ixgbe_tm_conf        tm_conf;
+
+	/* For RSS reta table update */
+	uint8_t rss_reta_updated;
 };
 
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 7771d0e6d..9a79d18e4 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -3419,4 +3419,5 @@ ixgbe_rss_configure(struct rte_eth_dev *dev)
 {
 	struct rte_eth_rss_conf rss_conf;
+	struct ixgbe_adapter *adapter;
 	struct ixgbe_hw *hw;
 	uint32_t reta;
@@ -3427,4 +3428,5 @@ ixgbe_rss_configure(struct rte_eth_dev *dev)
 
 	PMD_INIT_FUNC_TRACE();
+	adapter = (struct ixgbe_adapter *)dev->data->dev_private;
 	hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 
@@ -3436,14 +3438,16 @@ ixgbe_rss_configure(struct rte_eth_dev *dev)
 	 * little-endian order.
 	 */
-	reta = 0;
-	for (i = 0, j = 0; i < sp_reta_size; i++, j++) {
-		reta_reg = ixgbe_reta_reg_get(hw->mac.type, i);
+	if (adapter->rss_reta_updated == 0) {
+		reta = 0;
+		for (i = 0, j = 0; i < sp_reta_size; i++, j++) {
+			reta_reg = ixgbe_reta_reg_get(hw->mac.type, i);
 
-		if (j == dev->data->nb_rx_queues)
-			j = 0;
-		reta = (reta << 8) | j;
-		if ((i & 3) == 3)
-			IXGBE_WRITE_REG(hw, reta_reg,
-					rte_bswap32(reta));
+			if (j == dev->data->nb_rx_queues)
+				j = 0;
+			reta = (reta << 8) | j;
+			if ((i & 3) == 3)
+				IXGBE_WRITE_REG(hw, reta_reg,
+						rte_bswap32(reta));
+		}
 	}
 
-- 
2.19.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2018-12-14 18:23:18.618193092 +0000
+++ 0014-net-ixgbe-fix-overwriting-RSS-RETA.patch	2018-12-14 18:23:18.000000000 +0000
@@ -1,14 +1,15 @@
-From 8832837c6e64a75be31f32c49da261db15054c0d Mon Sep 17 00:00:00 2001
+From a465a6033cef15196d213a8d910865a5b959508e Mon Sep 17 00:00:00 2001
 From: Xiaoyun Li <xiaoyun.li@intel.com>
 Date: Tue, 4 Dec 2018 12:37:57 +0800
 Subject: [PATCH] net/ixgbe: fix overwriting RSS RETA
 
+[ upstream commit 8832837c6e64a75be31f32c49da261db15054c0d ]
+
 When starting the device, the RSS table is initialized. So the RSS
 update before device_start would be overwritten. This patch allows users
 to update the RSS reta table before device_start.
 
 Fixes: db5b65301dde ("ethdev: allow to set RSS hash computation flags and/or key")
-Cc: stable@dpdk.org
 
 Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
 Acked-by: Qi Zhang <qi.z.zhang@intel.com>