[PATCH net-next 3/4] bnge: add ndo_set_rx_mode_async support

[Vikas Gupta <vikas.gupta@broadcom.com>]

Register bnge_set_rx_mode() as ndo_set_rx_mode_async to handle
unicast, multicast, broadcast, and promiscuous filter updates via
CFA_L2_SET_RX_MASK. The async variant receives pre-snapshotted address
lists from the kernel, allowing the driver to issue sleepable HWRM
firmware commands without holding the addr lock.

Move uc_update detection to the caller so the async path can compute
it directly from the snapshotted UC list before calling
bnge_cfg_rx_mode().

Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Dharmender Garg <dharmender.garg@broadcom.com>
Reviewed-by: Rahul Gupta <rahul-rg.gupta@broadcom.com>
---
 .../net/ethernet/broadcom/bnge/bnge_netdev.c  | 50 +++++++++++++++++--
 1 file changed, 45 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
index 1e3cdaeaa03d..e67536a8c430 100644
--- a/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_netdev.c
@@ -2202,16 +2202,13 @@ static bool bnge_promisc_ok(struct bnge_net *bn)
 }
 
 static int bnge_cfg_rx_mode(struct bnge_net *bn, struct netdev_hw_addr_list *uc,
-			    bool snapshot)
+			    bool uc_update, bool snapshot)
 {
 	struct bnge_vnic_info *vnic = &bn->vnic_info[BNGE_VNIC_DEFAULT];
 	struct net_device *dev = bn->netdev;
 	struct bnge_dev *bd = bn->bd;
 	struct netdev_hw_addr *ha;
 	int i, off = 0, rc;
-	bool uc_update;
-
-	uc_update = bnge_uc_list_updated(bn, uc);
 
 	if (!uc_update)
 		goto skip_uc;
@@ -2272,6 +2269,48 @@ static int bnge_cfg_rx_mode(struct bnge_net *bn, struct netdev_hw_addr_list *uc,
 	return rc;
 }
 
+static int bnge_set_rx_mode(struct net_device *dev,
+			    struct netdev_hw_addr_list *uc,
+			    struct netdev_hw_addr_list *mc)
+{
+	struct bnge_net *bn = netdev_priv(dev);
+	struct bnge_vnic_info *vnic;
+	bool mc_update = false;
+	bool uc_update;
+	u32 mask;
+
+	if (!test_bit(BNGE_STATE_OPEN, &bn->bd->state))
+		return 0;
+
+	vnic = &bn->vnic_info[BNGE_VNIC_DEFAULT];
+	mask = vnic->rx_mask;
+	mask &= ~(CFA_L2_SET_RX_MASK_REQ_MASK_PROMISCUOUS |
+		  CFA_L2_SET_RX_MASK_REQ_MASK_MCAST |
+		  CFA_L2_SET_RX_MASK_REQ_MASK_ALL_MCAST |
+		  CFA_L2_SET_RX_MASK_REQ_MASK_BCAST);
+
+	if (dev->flags & IFF_PROMISC)
+		mask |= CFA_L2_SET_RX_MASK_REQ_MASK_PROMISCUOUS;
+
+	uc_update = bnge_uc_list_updated(bn, uc);
+
+	if (dev->flags & IFF_BROADCAST)
+		mask |= CFA_L2_SET_RX_MASK_REQ_MASK_BCAST;
+	if (dev->flags & IFF_ALLMULTI) {
+		mask |= CFA_L2_SET_RX_MASK_REQ_MASK_ALL_MCAST;
+		vnic->mc_list_count = 0;
+	} else if (dev->flags & IFF_MULTICAST) {
+		mc_update = bnge_mc_list_updated(bn, &mask, mc);
+	}
+
+	if (mask != vnic->rx_mask || uc_update || mc_update) {
+		vnic->rx_mask = mask;
+		return bnge_cfg_rx_mode(bn, uc, uc_update, true);
+	}
+
+	return 0;
+}
+
 static void bnge_disable_int(struct bnge_net *bn)
 {
 	struct bnge_dev *bd = bn->bd;
@@ -2704,7 +2743,7 @@ static int bnge_init_chip(struct bnge_net *bn)
 		vnic->rx_mask |= mask;
 	}
 
-	rc = bnge_cfg_rx_mode(bn, &bn->netdev->uc, false);
+	rc = bnge_cfg_rx_mode(bn, &bn->netdev->uc, true, false);
 	if (rc == -EAGAIN) {
 		netif_rx_mode_schedule_retry(bn->netdev);
 		rc = 0;
@@ -3204,6 +3243,7 @@ static const struct net_device_ops bnge_netdev_ops = {
 	.ndo_stop		= bnge_close,
 	.ndo_start_xmit		= bnge_start_xmit,
 	.ndo_get_stats64	= bnge_get_stats64,
+	.ndo_set_rx_mode_async	= bnge_set_rx_mode,
 	.ndo_features_check	= bnge_features_check,
 };
 
-- 
2.47.1