sfc: Use Toeplitz IPv4 hash for RSS and hash insertion

Insertion of the Falcon hash is unreliable.

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

2 files changed, 22 insertions, 3 deletions

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 5a40145f6584..4f9d33f3cca1 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1581,8 +1581,14 @@ static void falcon_init_rx_cfg(struct efx_nic *efx)
                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_MAC_TH, data_xoff_thr);
                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XON_TX_TH, ctrl_xon_thr);
                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_XOFF_TX_TH, ctrl_xoff_thr);
-                EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1);
                 EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_INGR_EN, 1);
+
+                /* Enable hash insertion. This is broken for the
+                 * 'Falcon' hash so also select Toeplitz TCP/IPv4 and
+                 * IPv4 hashes. */
+                EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_INSRT_HDR, 1);
+                EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_HASH_ALG, 1);
+                EFX_SET_OWORD_FIELD(reg, FRF_BZ_RX_IP_HASH, 1);
         }
         /* Always enable XOFF signal from RX FIFO.  We enable
          * or disable transmission of pause frames at the MAC. */
@@ -1656,8 +1662,12 @@ static int falcon_init_nic(struct efx_nic *efx)
 
         falcon_init_rx_cfg(efx);
 
-        /* Set destination of both TX and RX Flush events */
         if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) {
+                /* Set hash key for IPv4 */
+                memcpy(&temp, efx->rx_hash_key, sizeof(temp));
+                efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
+
+                /* Set destination of both TX and RX Flush events */
                 EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
                 efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
         }
diff --git a/drivers/net/sfc/siena.c b/drivers/net/sfc/siena.c
index 7fd258ce3c06..3fab030f8ab5 100644
--- a/drivers/net/sfc/siena.c
+++ b/drivers/net/sfc/siena.c
@@ -327,10 +327,19 @@ static int siena_init_nic(struct efx_nic *efx)
 
         efx_reado(efx, &temp, FR_AZ_RX_CFG);
         EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_DESC_PUSH_EN, 0);
-        EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_INSRT_HDR, 1);
         EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_INGR_EN, 1);
+        /* Enable hash insertion. This is broken for the 'Falcon' hash
+         * if IPv6 hashing is also enabled, so also select Toeplitz
+         * TCP/IPv4 and IPv4 hashes. */
+        EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_INSRT_HDR, 1);
+        EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_ALG, 1);
+        EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_IP_HASH, 1);
         efx_writeo(efx, &temp, FR_AZ_RX_CFG);
 
+        /* Set hash key for IPv4 */
+        memcpy(&temp, efx->rx_hash_key, sizeof(temp));
+        efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
+
         /* Enable IPv6 RSS */
         BUILD_BUG_ON(sizeof(efx->rx_hash_key) <
                      2 * sizeof(temp) + FRF_CZ_RX_RSS_IPV6_TKEY_HI_WIDTH / 8 ||