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@xxxxxxxxxx>
Signed-off-by: lipeng <lipeng321@xxxxxxxxxx>
---
Patch V2: Addressed some internal commnets
Patch V1: Initial Submit
---
drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h | 94 +++++++++++
.../ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c | 188 +++++++++++++++++++++
2 files changed, 282 insertions(+)
create mode 100644 drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
create mode 100644 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
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 0000000..5a6ebfca
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2016-2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#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
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
new file mode 100644
index 0000000..fb3380b
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2016-2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include "hclge_mbx.h"
+#include "hclgevf_main.h"
+#include "hnae3.h"
+
+static void hclgevf_reset_mbx_resp_status(struct hclgevf_dev *hdev)
+{
+ /* this function should be called with mbx_resp.mbx_mutex held
+ * to prtect the received_response from race condition
+ */
+ hdev->mbx_resp.received_resp = false;
+ hdev->mbx_resp.origin_mbx_msg = 0;
+ hdev->mbx_resp.resp_status = 0;
+ memset(hdev->mbx_resp.additional_info, 0, HCLGE_MBX_MAX_RESP_DATA_SIZE);
+}
+
+/* hclgevf_get_mbx_resp: used to get a response from PF after VF sends a mailbox
+ * message to PF.
+ * @hdev: pointer to struct hclgevf_dev
+ * @resp_msg: pointer to store the original message type and response status
+ * @len: the resp_msg data array length.
+ */
+static int hclgevf_get_mbx_resp(struct hclgevf_dev *hdev, u16 code0, u16 code1,
+ u8 *resp_data, u16 resp_len)
+{
+#define HCLGEVF_MAX_TRY_TIMES 500
+#define HCLGEVF_SLEEP_USCOEND 1000
+ struct hclgevf_mbx_resp_status *mbx_resp;
+ u16 r_code0, r_code1;
+ int i = 0;
+
+ if (resp_len > HCLGE_MBX_MAX_RESP_DATA_SIZE) {
+ dev_err(&hdev->pdev->dev,
+ "VF mbx response len(=%d) exceeds maximum(=%d)\n",
+ resp_len,
+ HCLGE_MBX_MAX_RESP_DATA_SIZE);
+ return -EINVAL;
+ }
+
+ while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) {
+ udelay(HCLGEVF_SLEEP_USCOEND);
+ i++;
+ }
+
+ if (i >= HCLGEVF_MAX_TRY_TIMES) {
+ dev_err(&hdev->pdev->dev,
+ "VF could not get mbx resp(=%d) from PF in %d tries\n",
+ hdev->mbx_resp.received_resp, i);
+ return -EIO;
+ }
+
+ mbx_resp = &hdev->mbx_resp;
+ r_code0 = (u16)(mbx_resp->origin_mbx_msg >> 16);
+ r_code1 = (u16)(mbx_resp->origin_mbx_msg & 0xff);
+ if (resp_data)
+ memcpy(resp_data, &mbx_resp->additional_info[0], resp_len);
+
+ hclgevf_reset_mbx_resp_status(hdev);
+
+ if (!(r_code0 == code0 && r_code1 == code1 && !mbx_resp->resp_status)) {
+ dev_err(&hdev->pdev->dev,
+ "VF could not match resp code(code0=%d,code1=%d), %d",
+ code0, code1, mbx_resp->resp_status);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, u16 code, u16 subcode,
+ const u8 *msg_data, u8 msg_len, bool need_resp,
+ u8 *resp_data, u16 resp_len)
+{
+ struct hclge_mbx_vf_to_pf_cmd *req;
+ struct hclgevf_desc desc;
+ int status;
+
+ req = (struct hclge_mbx_vf_to_pf_cmd *)desc.data;
+
+ /* first two bytes are reserved for code & subcode */
+ if (msg_len > (HCLGE_MBX_MAX_MSG_SIZE - 2)) {
+ dev_err(&hdev->pdev->dev,
+ "VF send mbx msg fail, msg len %d exceeds max len %d\n",
+ msg_len, HCLGE_MBX_MAX_MSG_SIZE);
+ return -EINVAL;
+ }
+
+ hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_VF_TO_PF, false);
+ req->msg[0] = code;
+ req->msg[1] = subcode;
+ memcpy(&req->msg[2], msg_data, msg_len);
+
+ /* synchronous send */
+ if (need_resp) {
+ mutex_lock(&hdev->mbx_resp.mbx_mutex);
+ hclgevf_reset_mbx_resp_status(hdev);
+ status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
+ if (status) {
+ dev_err(&hdev->pdev->dev,
+ "VF failed(=%d) to send mbx message to PF\n",
+ status);
+ mutex_unlock(&hdev->mbx_resp.mbx_mutex);
+ return status;
+ }
+
+ status = hclgevf_get_mbx_resp(hdev, code, subcode, resp_data,
+ resp_len);
+ mutex_unlock(&hdev->mbx_resp.mbx_mutex);
+ } else {
+ /* asynchronous send */
+ status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
+ if (status) {
+ dev_err(&hdev->pdev->dev,
+ "VF failed(=%d) to send mbx message to PF\n",
+ status);
+ return status;
+ }
+ }
+
+ return status;
+}
+
+void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
+{
+ struct hclgevf_mbx_resp_status *resp;
+ struct hclge_mbx_pf_to_vf_cmd *req;
+ struct hclgevf_cmq_ring *crq;
+ struct hclgevf_desc *desc;
+ u16 link_status, flag;
+ u8 *temp;
+ int i;
+
+ resp = &hdev->mbx_resp;
+ crq = &hdev->hw.cmq.crq;
+
+ flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
+ while (hnae_get_bit(flag, HCLGEVF_CMDQ_RX_OUTVLD_B)) {
+ desc = &crq->desc[crq->next_to_use];
+ req = (struct hclge_mbx_pf_to_vf_cmd *)desc->data;
+
+ switch (req->msg[0]) {
+ case HCLGE_MBX_PF_VF_RESP:
+ if (resp->received_resp)
+ dev_warn(&hdev->pdev->dev,
+ "VF mbx resp flag not clear(%d)\n",
+ req->msg[1]);
+
+ resp->origin_mbx_msg = (req->msg[1] << 16);
+ resp->origin_mbx_msg |= req->msg[2];
+ resp->received_resp = true;
+
+ resp->resp_status = req->msg[3];
+
+ temp = (u8 *)&req->msg[4];
+ for (i = 0; i < HCLGE_MBX_MAX_RESP_DATA_SIZE; i++) {
+ resp->additional_info[i] = *temp;
+ temp++;
+ }
+ break;
+ case HCLGE_MBX_LINK_STAT_CHANGE:
+ link_status = le16_to_cpu(req->msg[1]);
+
+ /* update upper layer with new link link status */
+ hclgevf_update_link_status(hdev, link_status);
+
+ break;
+ default:
+ dev_err(&hdev->pdev->dev,
+ "VF received unsupported(%d) mbx msg from PF\n",
+ req->msg[0]);
+ break;
+ }
+ hclge_mbx_ring_ptr_move_crq(crq);
+ flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
+ }
+
+ /* Write back CMDQ_RQ header pointer, M7 need this pointer */
+ hclgevf_write_dev(&hdev->hw, HCLGEVF_NIC_CRQ_HEAD_REG,
+ crq->next_to_use);
+}
--
2.7.4
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