netdev - [PATCH net-next v3 5/8] bnxt_en: Return correct RSS indirection table entries to ethtool -x.

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Message-Id: <1593987732-1336-6-git-send-email-michael.chan@broadcom.com>
Date:   Sun,  5 Jul 2020 18:22:09 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org
Subject: [PATCH net-next v3 5/8] bnxt_en: Return correct RSS indirection table entries to ethtool -x.

Now that we have the logical indirection table, we can return these
proper logical indices directly to ethtool -x instead of the physical
IDs.

v3: Use ALIGN() to round up the RSS table size.

Reported-by: Jakub Kicinski <kicinski@...com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 6b88143..8bc4a7f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1275,6 +1275,10 @@ static int bnxt_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
 
 static u32 bnxt_get_rxfh_indir_size(struct net_device *dev)
 {
+	struct bnxt *bp = netdev_priv(dev);
+
+	if (bp->flags & BNXT_FLAG_CHIP_P5)
+		return ALIGN(bp->rx_nr_rings, BNXT_RSS_TABLE_ENTRIES_P5);
 	return HW_HASH_INDEX_SIZE;
 }
 
@@ -1288,7 +1292,7 @@ static int bnxt_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
 {
 	struct bnxt *bp = netdev_priv(dev);
 	struct bnxt_vnic_info *vnic;
-	int i = 0;
+	u32 i, tbl_size;
 
 	if (hfunc)
 		*hfunc = ETH_RSS_HASH_TOP;
@@ -1297,9 +1301,10 @@ static int bnxt_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
 		return 0;
 
 	vnic = &bp->vnic_info[0];
-	if (indir && vnic->rss_table) {
-		for (i = 0; i < HW_HASH_INDEX_SIZE; i++)
-			indir[i] = le16_to_cpu(vnic->rss_table[i]);
+	if (indir && bp->rss_indir_tbl) {
+		tbl_size = bnxt_get_rxfh_indir_size(dev);
+		for (i = 0; i < tbl_size; i++)
+			indir[i] = bp->rss_indir_tbl[i];
 	}
 
 	if (key && vnic->rss_hash_key)
-- 
1.8.3.1