octeon_ep: PF-VF mailbox version support

Add PF-VF mailbox initial version support
Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/marvell/octeon_ep/octep_main.h

@@ -220,6 +220,7 @@ struct octep_iface_link_info {
 /* The Octeon VF device specific info data structure.*/
 struct octep_pfvf_info {
 	u8 mac_addr[ETH_ALEN];
+	u32 mbox_version;
 };
 
 /* The Octeon device specific private data structure.

drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.c

@@ -27,10 +27,18 @@ static void octep_pfvf_validate_version(struct octep_device *oct,  u32 vf_id,
 {
 	u32 vf_version = (u32)cmd.s_version.version;
 
-	if (vf_version <= OCTEP_PFVF_MBOX_VERSION_V1)
-		rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
+	dev_dbg(&oct->pdev->dev, "VF id:%d VF version:%d PF version:%d\n",
+		vf_id, vf_version, OCTEP_PFVF_MBOX_VERSION_CURRENT);
+	if (vf_version < OCTEP_PFVF_MBOX_VERSION_CURRENT)
+		rsp->s_version.version = vf_version;
 	else
-		rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
+		rsp->s_version.version = OCTEP_PFVF_MBOX_VERSION_CURRENT;
+
+	oct->vf_info[vf_id].mbox_version = rsp->s_version.version;
+	dev_dbg(&oct->pdev->dev, "VF id:%d negotiated VF version:%d\n",
+		vf_id, oct->vf_info[vf_id].mbox_version);
+
+	rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
 }
 
 static void octep_pfvf_get_link_status(struct octep_device *oct, u32 vf_id,
@@ -166,6 +174,7 @@ int octep_setup_pfvf_mbox(struct octep_device *oct)
 			goto free_mbox;
 
 		memset(oct->mbox[ring], 0, sizeof(struct octep_mbox));
+		memset(&oct->vf_info[i], 0, sizeof(struct octep_pfvf_info));
 		mutex_init(&oct->mbox[ring]->lock);
 		INIT_WORK(&oct->mbox[ring]->wk.work, octep_pfvf_mbox_work);
 		oct->mbox[ring]->wk.ctxptr = oct->mbox[ring];

drivers/net/ethernet/marvell/octeon_ep/octep_pfvf_mbox.h

@@ -13,11 +13,15 @@
 #define OCTEON_SDP_16K_HW_FRS  16380UL
 #define OCTEON_SDP_64K_HW_FRS  65531UL
 
+/* When a new command is implemented,PF Mbox version should be bumped.
+ */
 enum octep_pfvf_mbox_version {
 	OCTEP_PFVF_MBOX_VERSION_V0,
 	OCTEP_PFVF_MBOX_VERSION_V1,
 };
 
+#define OCTEP_PFVF_MBOX_VERSION_CURRENT	OCTEP_PFVF_MBOX_VERSION_V1
+
 enum octep_pfvf_mbox_opcode {
 	OCTEP_PFVF_MBOX_CMD_VERSION,
 	OCTEP_PFVF_MBOX_CMD_SET_MTU,