enetc: Add vf to pf messaging support

VSIs (VFs) may send a message to the PSI (PF) for general notification
or to gain access to hardware resources which requires host inspection.
These messages may vary in size and are handled as a partition copy
between two memory regions owned by the respective participants.
The PSI will respond with fail or success and a 16-bit message code.
The patch implements the vf to pf messaging mechanism above and, as the
first application making use of this support, it enables the VF to
configure its own primary MAC address.

Signed-off-by: Catalin Horghidan <catalin.horghidan@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.h b/drivers/net/ethernet/freescale/enetc/enetc_pf.h
index a990eb6a85f7..2061ae5ccba0 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.h
@@ -19,14 +19,31 @@ struct enetc_mac_filter {
 
 #define ENETC_VLAN_HT_SIZE	64
 
+enum enetc_vf_flags {
+	ENETC_VF_FLAG_PF_SET_MAC	= BIT(0),
+};
+
+struct enetc_vf_state {
+	enum enetc_vf_flags flags;
+};
+
 struct enetc_pf {
 	struct enetc_si *si;
 	int num_vfs; /* number of active VFs, after sriov_init */
 	int total_vfs; /* max number of VFs, set for PF at probe */
+	struct enetc_vf_state *vf_state;
 
 	struct enetc_mac_filter mac_filter[ENETC_MAX_NUM_MAC_FLT];
 
+	struct enetc_msg_swbd rxmsg[ENETC_MAX_NUM_VFS];
+	struct work_struct msg_task;
+	char msg_int_name[ENETC_INT_NAME_MAX];
+
 	char vlan_promisc_simap; /* bitmap of SIs in VLAN promisc mode */
 	DECLARE_BITMAP(vlan_ht_filter, ENETC_VLAN_HT_SIZE);
 	DECLARE_BITMAP(active_vlans, VLAN_N_VID);
 };
+
+int enetc_msg_psi_init(struct enetc_pf *pf);
+void enetc_msg_psi_free(struct enetc_pf *pf);
+void enetc_msg_handle_rxmsg(struct enetc_pf *pf, int mbox_id, u16 *status);