netdev - [PATCH net-next 4/4] net: aquantia: add support of RSS configuration

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Message-ID: <89a6c51cb17ee2865a99a0cd7ff627095fb6b472.1544106687.git.igor.russkikh@aquantia.com>
Date:   Thu, 6 Dec 2018 15:02:52 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     "David S . Miller" <davem@...emloft.net>
CC:     Dmitry Bogdanov <Dmitry.Bogdanov@...antia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Igor Russkikh <Igor.Russkikh@...antia.com>
Subject: [PATCH net-next 4/4] net: aquantia: add support of RSS configuration

From: Dmitry Bogdanov <dmitry.bogdanov@...antia.com>

Add support of configuration of RSS hash key and RSS indirection table.

Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@...antia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
---
 .../ethernet/aquantia/atlantic/aq_ethtool.c   | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
index a5fd71692c8b..2f2e12c2b632 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
@@ -202,6 +202,47 @@ static int aq_ethtool_get_rss(struct net_device *ndev, u32 *indir, u8 *key,
 	return 0;
 }
 
+static int aq_ethtool_set_rss(struct net_device *netdev, const u32 *indir,
+			      const u8 *key, const u8 hfunc)
+{
+	struct aq_nic_s *aq_nic = netdev_priv(netdev);
+	struct aq_nic_cfg_s *cfg;
+	unsigned int i = 0U;
+	u32 rss_entries;
+	int err = 0;
+
+	cfg = aq_nic_get_cfg(aq_nic);
+	rss_entries = cfg->aq_rss.indirection_table_size;
+
+	/* We do not allow change in unsupported parameters */
+	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
+		return -EOPNOTSUPP;
+	/* Fill out the redirection table */
+	if (indir) {
+		/* Verify user input. */
+		for (i = 0; i < rss_entries; i++)
+			if (indir[i] >= cfg->num_rss_queues)
+				return -EINVAL;
+
+		for (i = 0; i < rss_entries; i++)
+			cfg->aq_rss.indirection_table[i] = indir[i];
+	}
+
+	/* Fill out the rss hash key */
+	if (key) {
+		memcpy(cfg->aq_rss.hash_secret_key, key,
+		       sizeof(cfg->aq_rss.hash_secret_key));
+		err = aq_nic->aq_hw_ops->hw_rss_hash_set(aq_nic->aq_hw,
+			&cfg->aq_rss);
+		if (err)
+			return err;
+	}
+
+	err = aq_nic->aq_hw_ops->hw_rss_set(aq_nic->aq_hw, &cfg->aq_rss);
+
+	return err;
+}
+
 static int aq_ethtool_get_rxnfc(struct net_device *ndev,
 				struct ethtool_rxnfc *cmd,
 				u32 *rule_locs)
@@ -549,6 +590,7 @@ const struct ethtool_ops aq_ethtool_ops = {
 	.set_pauseparam      = aq_ethtool_set_pauseparam,
 	.get_rxfh_key_size   = aq_ethtool_get_rss_key_size,
 	.get_rxfh            = aq_ethtool_get_rss,
+	.set_rxfh            = aq_ethtool_set_rss,
 	.get_rxnfc           = aq_ethtool_get_rxnfc,
 	.set_rxnfc           = aq_ethtool_set_rxnfc,
 	.get_sset_count      = aq_ethtool_get_sset_count,
-- 
2.17.1