[RFC 01/19] net/i40e: Add peer register/unregister to struct i40e_netdev_priv

[Shiraz Saleem]

Expose the register/unregister function pointers in the struct
i40e_netdev_priv which is accesible via the netdev_priv() interface
in the RDMA driver. On a netdev notification in the RDMA driver,
the appropriate LAN driver register/unregister functions are invoked
from the struct i40e_netdev_priv structure,

This is done in order to support single RDMA driver to work with
multiple LAN drivers over multi-generation Intel HW supporting RDMA

Signed-off-by: Shiraz Saleem <shiraz.sal...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h        |  1 +
 drivers/net/ethernet/intel/i40e/i40e_client.h | 10 ++++++++++
 drivers/net/ethernet/intel/i40e/i40e_main.c   |  7 +++++++
 3 files changed, 18 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h 
b/drivers/net/ethernet/intel/i40e/i40e.h
index 8de9085..7bc6316 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -795,6 +795,7 @@ struct i40e_vsi {
 } ____cacheline_internodealigned_in_smp;
 
 struct i40e_netdev_priv {
+       struct idc_srv_provider prov_callbacks;
        struct i40e_vsi *vsi;
 };
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_client.h 
b/drivers/net/ethernet/intel/i40e/i40e_client.h
index 72994ba..70ddb76 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_client.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_client.h
@@ -44,6 +44,16 @@ enum i40e_client_instance_state {
 #define I40E_QUEUE_TYPE_PE_AEQ  0x80
 #define I40E_QUEUE_INVALID_IDX 0xFFFF
 
+#define IDC_SIGNATURE 0x494e54454c494443ULL    /* INTELIDC */
+struct idc_srv_provider {
+       u64 signature;
+       u16 maj_ver;
+       u16 min_ver;
+       u8 rsvd[4];
+       int (*reg_peer_driver)(struct i40e_client *client);
+       int (*unreg_peer_driver)(struct i40e_client *client);
+};
+
 struct i40e_qv_info {
        u32 v_idx; /* msix_vector */
        u16 ceq_idx;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c 
b/drivers/net/ethernet/intel/i40e/i40e_main.c
index f52e2c4..114ff0e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12243,6 +12243,13 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
        np = netdev_priv(netdev);
        np->vsi = vsi;
 
+       np->prov_callbacks.signature = IDC_SIGNATURE;
+       np->prov_callbacks.maj_ver = I40E_CLIENT_VERSION_MAJOR;
+       np->prov_callbacks.min_ver = I40E_CLIENT_VERSION_MINOR;
+       memset(np->prov_callbacks.rsvd, 0, sizeof(np->prov_callbacks.rsvd));
+       np->prov_callbacks.reg_peer_driver = i40e_register_client;
+       np->prov_callbacks.unreg_peer_driver = i40e_unregister_client;
+
        hw_enc_features = NETIF_F_SG                    |
                          NETIF_F_IP_CSUM               |
                          NETIF_F_IPV6_CSUM             |
-- 
1.8.3.1