[PATCH net-next 3/9] net: atlantic: decouple aq_set_data_fl3l4() from driver internals driver internals

[<sukhdeeps@marvell.com>]

From: Sukhdeep Singh <sukhdeeps@marvell.com>

Refactor aq_set_data_fl3l4() to take an ethtool_rx_flow_spec pointer and
an explicit HW register location instead of driver-internal structures
(aq_nic_s, aq_rx_filter). This makes the function reusable for PTP
filter setup which constructs flow specs independently.

Key changes:
- Add aq_is_ipv6_flow_type() helper to derive IPv6 status from the
  flow_type field, replacing the dependency on rx_fltrs->fl3l4.is_ipv6
  shared state.
- Change aq_set_data_fl3l4() signature to accept (fsp, data, location,
  add) and export it via aq_filters.h.
- Update aq_add_del_fl3l4() to compute the HW register location and
  pass it explicitly.

Signed-off-by: Sukhdeep Singh <sukhdeeps@marvell.com>
---
 .../ethernet/aquantia/atlantic/aq_filters.c   | 31 ++++++++++++++-----
 .../ethernet/aquantia/atlantic/aq_filters.h   |  3 ++
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_filters.c b/drivers/net/ethernet/aquantia/atlantic/aq_filters.c
index 150a0b1af26a..4be7b629bfac 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_filters.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_filters.c
@@ -181,6 +181,20 @@ aq_check_approve_fvlan(struct aq_nic_s *aq_nic,
 	return 0;
 }
 
+static bool aq_is_ipv6_flow_type(const struct ethtool_rx_flow_spec *fsp)
+{
+	switch (fsp->flow_type & ~FLOW_EXT) {
+	case TCP_V6_FLOW:
+	case UDP_V6_FLOW:
+	case SCTP_V6_FLOW:
+	case IPV6_FLOW:
+	case IPV6_USER_FLOW:
+		return true;
+	default:
+		return false;
+	}
+}
+
 static int __must_check
 aq_check_filter(struct aq_nic_s *aq_nic,
 		struct ethtool_rx_flow_spec *fsp)
@@ -466,18 +480,16 @@ static int aq_add_del_fvlan(struct aq_nic_s *aq_nic,
 	return aq_filters_vlans_update(aq_nic);
 }
 
-static int aq_set_data_fl3l4(struct aq_nic_s *aq_nic,
-			     struct aq_rx_filter *aq_rx_fltr,
-			     struct aq_rx_filter_l3l4 *data, bool add)
+int aq_set_data_fl3l4(const struct ethtool_rx_flow_spec *fsp,
+		      struct aq_rx_filter_l3l4 *data,
+		      int location, bool add)
 {
-	struct aq_hw_rx_fltrs_s *rx_fltrs = aq_get_hw_rx_fltrs(aq_nic);
-	const struct ethtool_rx_flow_spec *fsp = &aq_rx_fltr->aq_fsp;
 	u32 flow = fsp->flow_type & ~FLOW_EXT;
 
 	memset(data, 0, sizeof(*data));
 
-	data->is_ipv6 = rx_fltrs->fl3l4.is_ipv6;
-	data->location = HW_ATL_GET_REG_LOCATION_FL3L4(fsp->location);
+	data->is_ipv6 = aq_is_ipv6_flow_type(fsp);
+	data->location = location;
 
 	if (!add)
 		return 0;
@@ -569,13 +581,16 @@ static int aq_add_del_fl3l4(struct aq_nic_s *aq_nic,
 	const struct aq_hw_ops *aq_hw_ops = aq_nic->aq_hw_ops;
 	struct aq_hw_s *aq_hw = aq_nic->aq_hw;
 	struct aq_rx_filter_l3l4 data;
+	int location;
 	int err;
 
 	if (unlikely(aq_rx_fltr->aq_fsp.location < AQ_RX_FIRST_LOC_FL3L4 ||
 		     aq_rx_fltr->aq_fsp.location > AQ_RX_LAST_LOC_FL3L4))
 		return -EINVAL;
 
-	aq_set_data_fl3l4(aq_nic, aq_rx_fltr, &data, add);
+	location = HW_ATL_GET_REG_LOCATION_FL3L4(aq_rx_fltr->aq_fsp.location);
+
+	aq_set_data_fl3l4(&aq_rx_fltr->aq_fsp, &data, location, add);
 
 	err = aq_set_fl3l4(aq_hw, aq_hw_ops, &data);
 	if (err)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_filters.h b/drivers/net/ethernet/aquantia/atlantic/aq_filters.h
index 122e06c88a33..96e89c8e52d0 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_filters.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_filters.h
@@ -32,5 +32,8 @@ int aq_clear_rxnfc_all_rules(struct aq_nic_s *aq_nic);
 int aq_reapply_rxnfc_all_rules(struct aq_nic_s *aq_nic);
 int aq_filters_vlans_update(struct aq_nic_s *aq_nic);
 int aq_filters_vlan_offload_off(struct aq_nic_s *aq_nic);
+int aq_set_data_fl3l4(const struct ethtool_rx_flow_spec *fsp,
+		      struct aq_rx_filter_l3l4 *data,
+		      int location, bool add);
 
 #endif /* AQ_FILTERS_H */
-- 
2.43.0