Commit 5de1fce3 authored by Pavan Chebbi's avatar Pavan Chebbi Committed by Jakub Kicinski
Browse files

bnxt_en: Add support for user configured RSS key 



Store the user configured or generated Toeplitz key in
bp->rss_hash_key.  The key stays constant across ifdown/ifup
unless updated by the user.

Signed-off-by: default avatarPavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240205223202.25341-12-michael.chan@broadcom.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 44af4b62

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+16 −2
Original line number Diff line number Diff line
@@ -4246,9 +4246,23 @@ static void bnxt_init_vnics(struct bnxt *bp) 
				u8 *key = (void *)vnic->rss_hash_key;

				int k;



				bp->toeplitz_prefix = 0;

				get_random_bytes(vnic->rss_hash_key,

				if (!bp->rss_hash_key_valid &&

				    !bp->rss_hash_key_updated) {

					get_random_bytes(bp->rss_hash_key,

							 HW_HASH_KEY_SIZE);

					bp->rss_hash_key_updated = true;

				}



				memcpy(vnic->rss_hash_key, bp->rss_hash_key,

				       HW_HASH_KEY_SIZE);



				if (!bp->rss_hash_key_updated)

					continue;



				bp->rss_hash_key_updated = false;

				bp->rss_hash_key_valid = true;



				bp->toeplitz_prefix = 0;

				for (k = 0; k < 8; k++) {

					bp->toeplitz_prefix <<= 8;

					bp->toeplitz_prefix |= key[k];

drivers/net/ethernet/broadcom/bnxt/bnxt.h

+4 −0
Original line number Diff line number Diff line
@@ -2222,6 +2222,10 @@ struct bnxt { 
#define BNXT_RSS_CAP_NEW_RSS_CAP		BIT(2)

#define BNXT_RSS_CAP_RSS_TCAM			BIT(3)



	u8			rss_hash_key[HW_HASH_KEY_SIZE];

	u8			rss_hash_key_valid:1;

	u8			rss_hash_key_updated:1;



	u16			max_mtu;

	u8			max_tc;

	u8			max_lltc;	/* lossless TCs */

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

+4 −2
Original line number Diff line number Diff line
@@ -1755,8 +1755,10 @@ static int bnxt_set_rxfh(struct net_device *dev, 
	if (rxfh->hfunc && rxfh->hfunc != ETH_RSS_HASH_TOP)

		return -EOPNOTSUPP;



	if (rxfh->key)

		return -EOPNOTSUPP;

	if (rxfh->key) {

		memcpy(bp->rss_hash_key, rxfh->key, HW_HASH_KEY_SIZE);

		bp->rss_hash_key_updated = true;

	}



	if (rxfh->indir) {

		u32 i, pad, tbl_size = bnxt_get_rxfh_indir_size(dev);