net: hns3: Add mailbox support to VF driver

This patch adds the support of the mailbox to the VF driver. The
mailbox shall be used as an interface to communicate with the
PF driver for various purposes like {set|get} MAC related
operations, reset, link status etc. The mailbox supports both
synchronous and asynchronous command send to PF driver.

Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 88 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h b/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
new file mode 100644
index 000000000000..3e9203ea42a6
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2016-2017 Hisilicon Limited. */
+
+#ifndef __HCLGE_MBX_H
+#define __HCLGE_MBX_H
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+#define HCLGE_MBX_VF_MSG_DATA_NUM	16
+
+enum HCLGE_MBX_OPCODE {
+	HCLGE_MBX_RESET = 0x01,		/* (VF -> PF) assert reset */
+	HCLGE_MBX_SET_UNICAST,		/* (VF -> PF) set UC addr */
+	HCLGE_MBX_SET_MULTICAST,	/* (VF -> PF) set MC addr */
+	HCLGE_MBX_SET_VLAN,		/* (VF -> PF) set VLAN */
+	HCLGE_MBX_MAP_RING_TO_VECTOR,	/* (VF -> PF) map ring-to-vector */
+	HCLGE_MBX_UNMAP_RING_TO_VECTOR,	/* (VF -> PF) unamp ring-to-vector */
+	HCLGE_MBX_SET_PROMISC_MODE,	/* (VF -> PF) set promiscuous mode */
+	HCLGE_MBX_SET_MACVLAN,		/* (VF -> PF) set unicast filter */
+	HCLGE_MBX_API_NEGOTIATE,	/* (VF -> PF) negotiate API version */
+	HCLGE_MBX_GET_QINFO,		/* (VF -> PF) get queue config */
+	HCLGE_MBX_GET_TCINFO,		/* (VF -> PF) get TC config */
+	HCLGE_MBX_GET_RETA,		/* (VF -> PF) get RETA */
+	HCLGE_MBX_GET_RSS_KEY,		/* (VF -> PF) get RSS key */
+	HCLGE_MBX_GET_MAC_ADDR,		/* (VF -> PF) get MAC addr */
+	HCLGE_MBX_PF_VF_RESP,		/* (PF -> VF) generate respone to VF */
+	HCLGE_MBX_GET_BDNUM,		/* (VF -> PF) get BD num */
+	HCLGE_MBX_GET_BUFSIZE,		/* (VF -> PF) get buffer size */
+	HCLGE_MBX_GET_STREAMID,		/* (VF -> PF) get stream id */
+	HCLGE_MBX_SET_AESTART,		/* (VF -> PF) start ae */
+	HCLGE_MBX_SET_TSOSTATS,		/* (VF -> PF) get tso stats */
+	HCLGE_MBX_LINK_STAT_CHANGE,	/* (PF -> VF) link status has changed */
+	HCLGE_MBX_GET_BASE_CONFIG,	/* (VF -> PF) get config */
+	HCLGE_MBX_BIND_FUNC_QUEUE,	/* (VF -> PF) bind function and queue */
+	HCLGE_MBX_GET_LINK_STATUS,	/* (VF -> PF) get link status */
+	HCLGE_MBX_QUEUE_RESET,		/* (VF -> PF) reset queue */
+};
+
+/* below are per-VF mac-vlan subcodes */
+enum hclge_mbx_mac_vlan_subcode {
+	HCLGE_MBX_MAC_VLAN_UC_MODIFY = 0,	/* modify UC mac addr */
+	HCLGE_MBX_MAC_VLAN_UC_ADD,		/* add a new UC mac addr */
+	HCLGE_MBX_MAC_VLAN_UC_REMOVE,		/* remove a new UC mac addr */
+	HCLGE_MBX_MAC_VLAN_MC_MODIFY,		/* modify MC mac addr */
+	HCLGE_MBX_MAC_VLAN_MC_ADD,		/* add new MC mac addr */
+	HCLGE_MBX_MAC_VLAN_MC_REMOVE,		/* remove MC mac addr */
+	HCLGE_MBX_MAC_VLAN_MC_FUNC_MTA_ENABLE,	/* config func MTA enable */
+};
+
+/* below are per-VF vlan cfg subcodes */
+enum hclge_mbx_vlan_cfg_subcode {
+	HCLGE_MBX_VLAN_FILTER = 0,	/* set vlan filter */
+	HCLGE_MBX_VLAN_TX_OFF_CFG,	/* set tx side vlan offload */
+	HCLGE_MBX_VLAN_RX_OFF_CFG,	/* set rx side vlan offload */
+};
+
+#define HCLGE_MBX_MAX_MSG_SIZE	16
+#define HCLGE_MBX_MAX_RESP_DATA_SIZE	8
+
+struct hclgevf_mbx_resp_status {
+	struct mutex mbx_mutex; /* protects against contending sync cmd resp */
+	u32 origin_mbx_msg;
+	bool received_resp;
+	int resp_status;
+	u8 additional_info[HCLGE_MBX_MAX_RESP_DATA_SIZE];
+};
+
+struct hclge_mbx_vf_to_pf_cmd {
+	u8 rsv;
+	u8 mbx_src_vfid; /* Auto filled by IMP */
+	u8 rsv1[2];
+	u8 msg_len;
+	u8 rsv2[3];
+	u8 msg[HCLGE_MBX_MAX_MSG_SIZE];
+};
+
+struct hclge_mbx_pf_to_vf_cmd {
+	u8 dest_vfid;
+	u8 rsv[3];
+	u8 msg_len;
+	u8 rsv1[3];
+	u16 msg[8];
+};
+
+#define hclge_mbx_ring_ptr_move_crq(crq) \
+	(crq->next_to_use = (crq->next_to_use + 1) % crq->desc_num)
+#endif