sfc: Add support for RX flow hash control

Allow ethtool to query the number of RX rings, the fields used in RX
flow hashing and the hash indirection table.

Allow ethtool to update the RX flow hash indirection table.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 2a90bf9df91..35b3f2922e5 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -1121,6 +1121,7 @@ static void efx_set_channels(struct efx_nic *efx)
 
 static int efx_probe_nic(struct efx_nic *efx)
 {
+        size_t i;
         int rc;
 
         netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
@@ -1136,6 +1137,8 @@ static int efx_probe_nic(struct efx_nic *efx)
 
         if (efx->n_channels > 1)
                 get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
+        for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
+                efx->rx_indir_table[i] = i % efx->n_rx_channels;
 
         efx_set_channels(efx);
         efx->net_dev->real_num_tx_queues = efx->n_tx_channels;