patch 'net/nfb: fix multicast/promiscuous mode switching' has been queued to stable release 21.11.1

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/06/22. 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.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/967cb497480d8cefb63eec51b4705ce647175ff8

Thanks.

Kevin

---
>From 967cb497480d8cefb63eec51b4705ce647175ff8 Mon Sep 17 00:00:00 2001
From: Martin Spinler <spinler at cesnet.cz>
Date: Tue, 15 Feb 2022 13:55:42 +0100
Subject: [PATCH] net/nfb: fix multicast/promiscuous mode switching

[ upstream commit 6685343c4805fcae80bad449903d848409193bd8 ]

In the firmware, the promisc mode overrides the multicast mode.
So when the promisc mode is turned off, driver must check if the
multicast mode was active before and conditionally reactivate it.

Fixes: 6435f9a0ac22 ("net/nfb: add new netcope driver")

Signed-off-by: Martin Spinler <spinler at cesnet.cz>
---
 drivers/net/nfb/nfb.h        |  4 ----
 drivers/net/nfb/nfb_ethdev.c |  1 -
 drivers/net/nfb/nfb_rxmode.c | 20 ++++++++------------
 3 files changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/net/nfb/nfb.h b/drivers/net/nfb/nfb.h
index 59d3ab4986..96c44c3a45 100644
--- a/drivers/net/nfb/nfb.h
+++ b/drivers/net/nfb/nfb.h
@@ -49,8 +49,4 @@ struct pmd_internals {
 	char             nfb_dev[PATH_MAX];
 	struct nfb_device *nfb;
-	/* Place to remember if filter was promiscuous or filtering by table,
-	 * when disabling allmulticast
-	 */
-	enum nc_rxmac_mac_filter rx_filter_original;
 };
 
diff --git a/drivers/net/nfb/nfb_ethdev.c b/drivers/net/nfb/nfb_ethdev.c
index 0b27fe78cc..d9e43bc027 100644
--- a/drivers/net/nfb/nfb_ethdev.c
+++ b/drivers/net/nfb/nfb_ethdev.c
@@ -517,5 +517,4 @@ nfb_eth_dev_init(struct rte_eth_dev *dev)
 	data->promiscuous = nfb_eth_promiscuous_get(dev);
 	data->all_multicast = nfb_eth_allmulticast_get(dev);
-	internals->rx_filter_original = data->promiscuous;
 
 	dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
diff --git a/drivers/net/nfb/nfb_rxmode.c b/drivers/net/nfb/nfb_rxmode.c
index 2d0b613d21..ca6e4d5578 100644
--- a/drivers/net/nfb/nfb_rxmode.c
+++ b/drivers/net/nfb/nfb_rxmode.c
@@ -15,6 +15,4 @@ nfb_eth_promiscuous_enable(struct rte_eth_dev *dev)
 	uint16_t i;
 
-	internals->rx_filter_original = RXMAC_MAC_FILTER_PROMISCUOUS;
-
 	for (i = 0; i < internals->max_rxmac; ++i) {
 		nc_rxmac_mac_filter_enable(internals->rxmac[i],
@@ -31,14 +29,11 @@ nfb_eth_promiscuous_disable(struct rte_eth_dev *dev)
 		dev->data->dev_private;
 	uint16_t i;
+	enum nc_rxmac_mac_filter filter = RXMAC_MAC_FILTER_TABLE_BCAST;
 
-	internals->rx_filter_original = RXMAC_MAC_FILTER_TABLE;
-
-	/* if promisc is not enabled, do nothing */
-	if (!nfb_eth_promiscuous_get(dev))
-		return 0;
+	if (dev->data->all_multicast)
+		filter = RXMAC_MAC_FILTER_TABLE_BCAST_MCAST;
 
 	for (i = 0; i < internals->max_rxmac; ++i) {
-		nc_rxmac_mac_filter_enable(internals->rxmac[i],
-			RXMAC_MAC_FILTER_TABLE);
+		nc_rxmac_mac_filter_enable(internals->rxmac[i], filter);
 	}
 
@@ -68,4 +63,6 @@ nfb_eth_allmulticast_enable(struct rte_eth_dev *dev)
 
 	uint16_t i;
+	if (dev->data->promiscuous)
+		return 0;
 	for (i = 0; i < internals->max_rxmac; ++i) {
 		nc_rxmac_mac_filter_enable(internals->rxmac[i],
@@ -84,11 +81,10 @@ nfb_eth_allmulticast_disable(struct rte_eth_dev *dev)
 	uint16_t i;
 
-	/* if multicast is not enabled do nothing */
-	if (!nfb_eth_allmulticast_get(dev))
+	if (dev->data->promiscuous)
 		return 0;
 
 	for (i = 0; i < internals->max_rxmac; ++i) {
 		nc_rxmac_mac_filter_enable(internals->rxmac[i],
-			internals->rx_filter_original);
+			RXMAC_MAC_FILTER_TABLE_BCAST);
 	}
 
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-03-01 10:41:02.325049159 +0000
+++ 0037-net-nfb-fix-multicast-promiscuous-mode-switching.patch	2022-03-01 10:41:01.290244095 +0000
@@ -1 +1 @@
-From 6685343c4805fcae80bad449903d848409193bd8 Mon Sep 17 00:00:00 2001
+From 967cb497480d8cefb63eec51b4705ce647175ff8 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 6685343c4805fcae80bad449903d848409193bd8 ]
+
@@ -11 +12,0 @@
-Cc: stable at dpdk.org
@@ -21 +22 @@
-index 4de9006ac0..7dc5bd29e4 100644
+index 59d3ab4986..96c44c3a45 100644
@@ -24 +25 @@
-@@ -48,8 +48,4 @@ struct pmd_internals {
+@@ -49,8 +49,4 @@ struct pmd_internals {
@@ -34 +35 @@
-index 53a98642b3..5d503e131a 100644
+index 0b27fe78cc..d9e43bc027 100644
@@ -37 +38 @@
-@@ -535,5 +535,4 @@ nfb_eth_dev_init(struct rte_eth_dev *dev)
+@@ -517,5 +517,4 @@ nfb_eth_dev_init(struct rte_eth_dev *dev)