patch 'net/sfc: demand Tx fast free offload on EF10 simple datapath' has been queued to stable release 20.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/20/22. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/813b5994cfcbbbe75eaf9ed25918979e0fd74cf9

Thanks.

Luca Boccassi

---
>From 813b5994cfcbbbe75eaf9ed25918979e0fd74cf9 Mon Sep 17 00:00:00 2001
From: Ivan Malov <ivan.malov at oktetlabs.ru>
Date: Wed, 9 Feb 2022 02:26:48 +0300
Subject: [PATCH] net/sfc: demand Tx fast free offload on EF10 simple datapath

[ upstream commit 24a491bb882a3269b9b4e2754e1d5b43d83b9821 ]

Enforce this offload as it is immutable on the said datapath.

Fixes: c78d280e88ef ("net/sfc: convert to new Tx offload API")

Signed-off-by: Ivan Malov <ivan.malov at oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton at xilinx.com>
---
 drivers/net/sfc/sfc_tx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/sfc/sfc_tx.c b/drivers/net/sfc/sfc_tx.c
index 24602e3d10..7c6bac694d 100644
--- a/drivers/net/sfc/sfc_tx.c
+++ b/drivers/net/sfc/sfc_tx.c
@@ -269,6 +269,7 @@ sfc_tx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
 static int
 sfc_tx_check_mode(struct sfc_adapter *sa, const struct rte_eth_txmode *txmode)
 {
+	uint64_t dev_tx_offload_cap = sfc_tx_get_dev_offload_caps(sa);
 	int rc = 0;
 
 	switch (txmode->mq_mode) {
@@ -280,6 +281,13 @@ sfc_tx_check_mode(struct sfc_adapter *sa, const struct rte_eth_txmode *txmode)
 		rc = EINVAL;
 	}
 
+	if ((dev_tx_offload_cap & DEV_TX_OFFLOAD_MBUF_FAST_FREE) != 0 &&
+	    (txmode->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE) == 0) {
+		sfc_err(sa, "There is no FAST_FREE flag in the attempted Tx mode configuration");
+		sfc_err(sa, "FAST_FREE is always active as per the current Tx datapath variant");
+		rc = EINVAL;
+	}
+
 	/*
 	 * These features are claimed to be i40e-specific,
 	 * but it does make sense to double-check their absence
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-18 12:37:42.022139407 +0000
+++ 0111-net-sfc-demand-Tx-fast-free-offload-on-EF10-simple-d.patch	2022-02-18 12:37:37.846795404 +0000
@@ -1 +1 @@
-From 24a491bb882a3269b9b4e2754e1d5b43d83b9821 Mon Sep 17 00:00:00 2001
+From 813b5994cfcbbbe75eaf9ed25918979e0fd74cf9 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 24a491bb882a3269b9b4e2754e1d5b43d83b9821 ]
+
@@ -9 +10,0 @@
-Cc: stable at dpdk.org
@@ -19 +20 @@
-index cd927cf2f7..f376f24f7b 100644
+index 24602e3d10..7c6bac694d 100644
@@ -22 +23 @@
-@@ -308,6 +308,7 @@ sfc_tx_qinit_info(struct sfc_adapter *sa, sfc_sw_index_t sw_index)
+@@ -269,6 +269,7 @@ sfc_tx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
@@ -30 +31 @@
-@@ -319,6 +320,13 @@ sfc_tx_check_mode(struct sfc_adapter *sa, const struct rte_eth_txmode *txmode)
+@@ -280,6 +281,13 @@ sfc_tx_check_mode(struct sfc_adapter *sa, const struct rte_eth_txmode *txmode)
@@ -34,2 +35,2 @@
-+	if ((dev_tx_offload_cap & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) != 0 &&
-+	    (txmode->offloads & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) == 0) {
++	if ((dev_tx_offload_cap & DEV_TX_OFFLOAD_MBUF_FAST_FREE) != 0 &&
++	    (txmode->offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE) == 0) {