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ionic: keep users rss hash across lif reset 

[ Upstream commit ffac2027e1 ]

If the user has specified their own RSS hash key, don't
lose it across queue resets such as DOWN/UP, MTU change,
and number of channels change.  This is fixed by moving
the key initialization to a little earlier in the lif
creation.

Also, let's clean up the RSS config a little better on
the way down by setting it all to 0.

Fixes: aa3198819b ("ionic: Add RSS support")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Shannon Nelson 2019-12-03 14:17:34 -08:00 committed by Greg Kroah-Hartman
parent 9bd01a33c7
commit dd561233e0
1 changed files with 10 additions and 6 deletions
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16
drivers/net/ethernet/pensando/ionic/ionic_lif.c
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@ -1364,12 +1364,9 @@ int ionic_lif_rss_config(struct ionic_lif *lif, const u16 types,
static int ionic_lif_rss_init(struct ionic_lif *lif)
{
u8 rss_key[IONIC_RSS_HASH_KEY_SIZE];
unsigned int tbl_sz;
unsigned int i;
netdev_rss_key_fill(rss_key, IONIC_RSS_HASH_KEY_SIZE);
lif->rss_types = IONIC_RSS_TYPE_IPV4 |
IONIC_RSS_TYPE_IPV4_TCP |
IONIC_RSS_TYPE_IPV4_UDP |
@ -1382,12 +1379,18 @@ static int ionic_lif_rss_init(struct ionic_lif *lif)
for (i = 0; i < tbl_sz; i++)
lif->rss_ind_tbl[i] = ethtool_rxfh_indir_default(i, lif->nxqs);
return ionic_lif_rss_config(lif, lif->rss_types, rss_key, NULL);
return ionic_lif_rss_config(lif, lif->rss_types, NULL, NULL);
}
static int ionic_lif_rss_deinit(struct ionic_lif *lif)
static void ionic_lif_rss_deinit(struct ionic_lif *lif)
{
return ionic_lif_rss_config(lif, 0x0, NULL, NULL);
int tbl_sz;
tbl_sz = le16_to_cpu(lif->ionic->ident.lif.eth.rss_ind_tbl_sz);
memset(lif->rss_ind_tbl, 0, tbl_sz);
memset(lif->rss_hash_key, 0, IONIC_RSS_HASH_KEY_SIZE);
ionic_lif_rss_config(lif, 0x0, NULL, NULL);
}
static void ionic_txrx_disable(struct ionic_lif *lif)
@ -1710,6 +1713,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
dev_err(dev, "Failed to allocate rss indirection table, aborting\n");
goto err_out_free_qcqs;
}
netdev_rss_key_fill(lif->rss_hash_key, IONIC_RSS_HASH_KEY_SIZE);
list_add_tail(&lif->list, &ionic->lifs);