[dpdk-dev] [dpdk-dev v2] net/iavf: fix VF reset issue for hash

[Jeff Guo <jia.guo@intel.com>]

Since there are some default rss configure in kernel PF/VF but not DPDK
IAVF, if these configurations be modified by VF and then VF reset, this
default rss configurations can not be reset to default by IAVF. So need
to add default rss set in IAVF hash initial process.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
Fixes: 7be10c3004be ("net/iavf: add RSS configuration for VF")
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Zhiwei He <zhiwei.he@intel.com>
---
v2->v1:
add hash engine unregister process
---
 drivers/net/iavf/iavf_hash.c | 53 +++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/drivers/net/iavf/iavf_hash.c b/drivers/net/iavf/iavf_hash.c
index 975c84556..56ab170d8 100644
--- a/drivers/net/iavf/iavf_hash.c
+++ b/drivers/net/iavf/iavf_hash.c
@@ -857,6 +857,17 @@ struct iavf_hash_match_type iavf_hash_type_list[] = {
 					&hdrs_hint_ipv6_sctp},
 };
 
+struct virtchnl_proto_hdrs *iavf_hash_default_hdrs[] = {
+	&hdrs_hint_ipv4,
+	&hdrs_hint_ipv4_udp,
+	&hdrs_hint_ipv4_tcp,
+	&hdrs_hint_ipv4_sctp,
+	&hdrs_hint_ipv6,
+	&hdrs_hint_ipv6_udp,
+	&hdrs_hint_ipv6_tcp,
+	&hdrs_hint_ipv6_sctp,
+};
+
 static struct iavf_flow_engine iavf_hash_engine = {
 	.init = iavf_hash_init,
 	.create = iavf_hash_create,
@@ -875,6 +886,33 @@ static struct iavf_flow_parser iavf_hash_parser = {
 	.stage = IAVF_FLOW_STAGE_RSS,
 };
 
+static int
+iavf_hash_default_set(struct iavf_adapter *ad)
+{
+	struct virtchnl_rss_cfg *rss_cfg;
+	uint16_t i;
+	int ret;
+
+	rss_cfg = rte_zmalloc("iavf rss rule",
+			      sizeof(struct virtchnl_rss_cfg), 0);
+	if (!rss_cfg)
+		return -ENOMEM;
+
+	for (i = 0; i < RTE_DIM(iavf_hash_default_hdrs); i++) {
+		rss_cfg->proto_hdrs = *iavf_hash_default_hdrs[i];
+		rss_cfg->rss_algorithm = VIRTCHNL_RSS_ALG_TOEPLITZ_ASYMMETRIC;
+
+		ret = iavf_add_del_rss_cfg(ad, rss_cfg, true);
+		if (ret) {
+			PMD_DRV_LOG(ERR, "fail to add RSS configure");
+			rte_free(rss_cfg);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
 RTE_INIT(iavf_hash_engine_init)
 {
 	struct iavf_flow_engine *engine = &iavf_hash_engine;
@@ -887,6 +925,7 @@ iavf_hash_init(struct iavf_adapter *ad)
 {
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(ad);
 	struct iavf_flow_parser *parser;
+	int ret;
 
 	if (!vf->vf_res)
 		return -EINVAL;
@@ -896,7 +935,19 @@ iavf_hash_init(struct iavf_adapter *ad)
 
 	parser = &iavf_hash_parser;
 
-	return iavf_register_parser(parser, ad);
+	ret = iavf_register_parser(parser, ad);
+	if (ret) {
+		PMD_DRV_LOG(ERR, "fail to register hash parser");
+		return ret;
+	}
+
+	ret = iavf_hash_default_set(ad);
+	if (ret) {
+		PMD_DRV_LOG(ERR, "fail to set default RSS");
+		iavf_unregister_parser(parser, ad);
+	}
+
+	return ret;
 }
 
 static int
-- 
2.20.1