ice: Add initial support framework for LAG

Add the framework and initial implementation for receiving and processing
netdev bonding events.  This is only the software support and the
implementation of the HW offload for bonding support will be coming at a
later time.  There are some architectural gaps that need to be closed
before that happens.

Because this is a software only solution that supports in kernel bonding,
SR-IOV is not supported with this implementation.

Signed-off-by: Dave Ertman <[email protected]>
Tested-by: Tony Brelinski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: dmertman

drivers/net/ethernet/intel/ice/Makefile

@@ -24,6 +24,7 @@ ice-y := ice_main.o	\
 	 ice_flow.o	\
 	 ice_devlink.o	\
 	 ice_fw_update.o \
+	 ice_lag.o	\
 	 ice_ethtool.o
 ice-$(CONFIG_PCI_IOV) += ice_virtchnl_pf.o ice_sriov.o
 ice-$(CONFIG_DCB) += ice_dcb.o ice_dcb_nl.o ice_dcb_lib.o

drivers/net/ethernet/intel/ice/ice.h

@@ -56,6 +56,7 @@
 #include "ice_fdir.h"
 #include "ice_xsk.h"
 #include "ice_arfs.h"
+#include "ice_lag.h"
 
 #define ICE_BAR0		0
 #define ICE_REQ_DESC_MULTIPLE	32
@@ -453,6 +454,7 @@ struct ice_pf {
 	__le64 nvm_phy_type_lo; /* NVM PHY type low */
 	__le64 nvm_phy_type_hi; /* NVM PHY type high */
 	struct ice_link_default_override_tlv link_dflt_override;
+	struct ice_lag *lag; /* Link Aggregation information */
 };
 
 struct ice_netdev_priv {
@@ -553,11 +555,31 @@ static inline struct ice_vsi *ice_get_ctrl_vsi(struct ice_pf *pf)
 	return pf->vsi[pf->ctrl_vsi_idx];
 }
 
+/**
+ * ice_set_sriov_cap - enable SRIOV in PF flags
+ * @pf: PF struct
+ */
+static inline void ice_set_sriov_cap(struct ice_pf *pf)
+{
+	if (pf->hw.func_caps.common_cap.sr_iov_1_1)
+		set_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags);
+}
+
+/**
+ * ice_clear_sriov_cap - disable SRIOV in PF flags
+ * @pf: PF struct
+ */
+static inline void ice_clear_sriov_cap(struct ice_pf *pf)
+{
+	clear_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags);
+}
+
 #define ICE_FD_STAT_CTR_BLOCK_COUNT	256
 #define ICE_FD_STAT_PF_IDX(base_idx) \
 			((base_idx) * ICE_FD_STAT_CTR_BLOCK_COUNT)
 #define ICE_FD_SB_STAT_IDX(base_idx) ICE_FD_STAT_PF_IDX(base_idx)
 
+bool netif_is_ice(struct net_device *dev);
 int ice_vsi_setup_tx_rings(struct ice_vsi *vsi);
 int ice_vsi_setup_rx_rings(struct ice_vsi *vsi);
 int ice_vsi_open_ctrl(struct ice_vsi *vsi);