From: Sunil Goutham <sgoutham@marvell.com>
Date: Sun, 22 Aug 2021 12:02:26 +0000 (+0530)
Subject: octeontx2-pf: Fix algorithm index in MCAM rules with RSS action
X-Git-Tag: v5.13.17~80
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72ad3963b51060039fe0537955064c22bdd5a31e;p=thirdparty%2Fkernel%2Fstable.git

octeontx2-pf: Fix algorithm index in MCAM rules with RSS action

[ Upstream commit e7938365459f3a6d4edf212f435c4ad635621450 ]

Otherthan setting action as RSS in NPC MCAM entry, RSS flowkey
algorithm index also needs to be set. Otherwise whatever algorithm
is defined at flowkey index '0' will be considered by HW and pkt
flows will be distributed as such.

Fix this by saving the flowkey index sent by admin function while
initializing RSS and then use it when framing MCAM rules.

Fixes: 81a4362016e7 ("octeontx2-pf: Add RSS multi group support")
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 871404f3b8d38..25f84ad50dbaf 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -266,6 +266,7 @@ unlock:
 int otx2_set_flowkey_cfg(struct otx2_nic *pfvf)
 {
 	struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+	struct nix_rss_flowkey_cfg_rsp *rsp;
 	struct nix_rss_flowkey_cfg *req;
 	int err;
 
@@ -280,6 +281,16 @@ int otx2_set_flowkey_cfg(struct otx2_nic *pfvf)
 	req->group = DEFAULT_RSS_CONTEXT_GROUP;
 
 	err = otx2_sync_mbox_msg(&pfvf->mbox);
+	if (err)
+		goto fail;
+
+	rsp = (struct nix_rss_flowkey_cfg_rsp *)
+			otx2_mbox_get_rsp(&pfvf->mbox.mbox, 0, &req->hdr);
+	if (IS_ERR(rsp))
+		goto fail;
+
+	pfvf->hw.flowkey_alg_idx = rsp->alg_idx;
+fail:
 	mutex_unlock(&pfvf->mbox.lock);
 	return err;
 }
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 45730d0d92f2b..c652c27cd3455 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -195,6 +195,9 @@ struct otx2_hw {
 	u8			lso_udpv4_idx;
 	u8			lso_udpv6_idx;
 
+	/* RSS */
+	u8			flowkey_alg_idx;
+
 	/* MSI-X */
 	u8			cint_cnt; /* CQ interrupt count */
 	u16			npa_msixoff; /* Offset of NPA vectors */
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
index 0b4fa92ba8214..81265dbf91e2a 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
@@ -682,6 +682,7 @@ static int otx2_add_flow_msg(struct otx2_nic *pfvf, struct otx2_flow *flow)
 		if (flow->flow_spec.flow_type & FLOW_RSS) {
 			req->op = NIX_RX_ACTIONOP_RSS;
 			req->index = flow->rss_ctx_id;
+			req->flow_key_alg = pfvf->hw.flowkey_alg_idx;
 		} else {
 			req->op = NIX_RX_ACTIONOP_UCAST;
 			req->index = ethtool_get_flow_spec_ring(ring_cookie);