ionic: add rx filtering for hw timestamp steering

Add handling of the new Rx packet classification filter type.
This simple bit of classification allows for steering packets
to a separate Rx queue for processing.

Signed-off-by: Allen Hubbe <allenbh@pensando.io>
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
index cd0076f..d71316d 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
@@ -140,6 +140,9 @@ int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
        case IONIC_RX_FILTER_MATCH_MAC_VLAN:
                key = le16_to_cpu(ac->mac_vlan.vlan);
                break;
+       case IONIC_RX_FILTER_STEER_PKTCLASS:
+               key = 0;
+               break;
        default:
                return -EINVAL;
        }
@@ -210,3 +213,21 @@ struct ionic_rx_filter *ionic_rx_filter_by_addr(struct ionic_lif *lif,
 
        return NULL;
 }
+
+struct ionic_rx_filter *ionic_rx_filter_rxsteer(struct ionic_lif *lif)
+{
+       struct ionic_rx_filter *f;
+       struct hlist_head *head;
+       unsigned int key;
+
+       key = hash_32(0, IONIC_RX_FILTER_HASH_BITS);
+       head = &lif->rx_filters.by_hash[key];
+
+       hlist_for_each_entry(f, head, by_hash) {
+               if (le16_to_cpu(f->cmd.match) != IONIC_RX_FILTER_STEER_PKTCLASS)
+                       continue;
+               return f;
+       }
+
+       return NULL;
+}

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
index cf8f4c0..1ead48b 100644 (file)
--- a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
@@ -31,5 +31,6 @@ int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
                         u32 hash, struct ionic_admin_ctx *ctx);
 struct ionic_rx_filter *ionic_rx_filter_by_vlan(struct ionic_lif *lif, u16 vid);
 struct ionic_rx_filter *ionic_rx_filter_by_addr(struct ionic_lif *lif, const u8 *addr);
+struct ionic_rx_filter *ionic_rx_filter_rxsteer(struct ionic_lif *lif);
 
 #endif /* _IONIC_RX_FILTER_H_ */