// SPDX-License-Identifier: GPL-2.0-only
/*
 * Huawei HiNIC PCI Express Linux driver
 * Copyright(c) 2017 Huawei Technologies Co., Ltd
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/semaphore.h>
#include <linux/completion.h>
#include <linux/slab.h>
#include <net/devlink.h>
#include <asm/barrier.h>

#include "hinic_devlink.h"
#include "hinic_hw_if.h"
#include "hinic_hw_eqs.h"
#include "hinic_hw_api_cmd.h"
#include "hinic_hw_mgmt.h"
#include "hinic_hw_dev.h"

#define SYNC_MSG_ID_MASK                0x1FF

#define SYNC_MSG_ID(pf_to_mgmt)         ((pf_to_mgmt)->sync_msg_id)

#define SYNC_MSG_ID_INC(pf_to_mgmt)     (SYNC_MSG_ID(pf_to_mgmt) = \
                                        ((SYNC_MSG_ID(pf_to_mgmt) + 1) & \
                                         SYNC_MSG_ID_MASK))

#define MSG_SZ_IS_VALID(in_size)        ((in_size) <= MAX_MSG_LEN)

#define MGMT_MSG_LEN_MIN                20
#define MGMT_MSG_LEN_STEP               16
#define MGMT_MSG_RSVD_FOR_DEV           8

#define SEGMENT_LEN                     48

#define MAX_PF_MGMT_BUF_SIZE            2048

/* Data should be SEG LEN size aligned */
#define MAX_MSG_LEN                     2016

#define MSG_NOT_RESP                    0xFFFF

#define MGMT_MSG_TIMEOUT                5000

#define SET_FUNC_PORT_MBOX_TIMEOUT      30000

#define SET_FUNC_PORT_MGMT_TIMEOUT      25000

#define UPDATE_FW_MGMT_TIMEOUT          20000

#define mgmt_to_pfhwdev(pf_mgmt)        \
                container_of(pf_mgmt, struct hinic_pfhwdev, pf_to_mgmt)

enum msg_segment_type {
        NOT_LAST_SEGMENT = 0,
        LAST_SEGMENT     = 1,
};

enum mgmt_direction_type {
        MGMT_DIRECT_SEND = 0,
        MGMT_RESP        = 1,
};

enum msg_ack_type {
        MSG_ACK         = 0,
        MSG_NO_ACK      = 1,
};

/**
 * hinic_register_mgmt_msg_cb - register msg handler for a msg from a module
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that this handler will handle its messages
 * @handle: private data for the callback
 * @callback: the handler that will handle messages
 **/
void hinic_register_mgmt_msg_cb(struct hinic_pf_to_mgmt *pf_to_mgmt,
                                enum hinic_mod_type mod,
                                void *handle,
                                void (*callback)(void *handle,
                                                 u8 cmd, void *buf_in,
                                                 u16 in_size, void *buf_out,
                                                 u16 *out_size))
{
        struct hinic_mgmt_cb *mgmt_cb = &pf_to_mgmt->mgmt_cb[mod];

        mgmt_cb->cb = callback;
        mgmt_cb->handle = handle;
        mgmt_cb->state = HINIC_MGMT_CB_ENABLED;
}

/**
 * hinic_unregister_mgmt_msg_cb - unregister msg handler for a msg from a module
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that this handler handles its messages
 **/
void hinic_unregister_mgmt_msg_cb(struct hinic_pf_to_mgmt *pf_to_mgmt,
                                  enum hinic_mod_type mod)
{
        struct hinic_mgmt_cb *mgmt_cb = &pf_to_mgmt->mgmt_cb[mod];

        mgmt_cb->state &= ~HINIC_MGMT_CB_ENABLED;

        while (mgmt_cb->state & HINIC_MGMT_CB_RUNNING)
                schedule();

        mgmt_cb->cb = NULL;
}

/**
 * prepare_header - prepare the header of the message
 * @pf_to_mgmt: PF to MGMT channel
 * @msg_len: the length of the message
 * @mod: module in the chip that will get the message
 * @ack_type: ask for response
 * @direction: the direction of the message
 * @cmd: command of the message
 * @msg_id: message id
 *
 * Return the prepared header value
 **/
static u64 prepare_header(struct hinic_pf_to_mgmt *pf_to_mgmt,
                          u16 msg_len, enum hinic_mod_type mod,
                          enum msg_ack_type ack_type,
                          enum mgmt_direction_type direction,
                          u16 cmd, u16 msg_id)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;

        return HINIC_MSG_HEADER_SET(msg_len, MSG_LEN)           |
               HINIC_MSG_HEADER_SET(mod, MODULE)                |
               HINIC_MSG_HEADER_SET(SEGMENT_LEN, SEG_LEN)       |
               HINIC_MSG_HEADER_SET(ack_type, NO_ACK)           |
               HINIC_MSG_HEADER_SET(0, ASYNC_MGMT_TO_PF)        |
               HINIC_MSG_HEADER_SET(0, SEQID)                   |
               HINIC_MSG_HEADER_SET(LAST_SEGMENT, LAST)         |
               HINIC_MSG_HEADER_SET(direction, DIRECTION)       |
               HINIC_MSG_HEADER_SET(cmd, CMD)                   |
               HINIC_MSG_HEADER_SET(HINIC_HWIF_PCI_INTF(hwif), PCI_INTF) |
               HINIC_MSG_HEADER_SET(HINIC_HWIF_PF_IDX(hwif), PF_IDX)     |
               HINIC_MSG_HEADER_SET(msg_id, MSG_ID);
}

/**
 * prepare_mgmt_cmd - prepare the mgmt command
 * @mgmt_cmd: pointer to the command to prepare
 * @header: pointer of the header for the message
 * @msg: the data of the message
 * @msg_len: the length of the message
 **/
static void prepare_mgmt_cmd(u8 *mgmt_cmd, u64 *header, u8 *msg, u16 msg_len)
{
        memset(mgmt_cmd, 0, MGMT_MSG_RSVD_FOR_DEV);

        mgmt_cmd += MGMT_MSG_RSVD_FOR_DEV;
        memcpy(mgmt_cmd, header, sizeof(*header));

        mgmt_cmd += sizeof(*header);
        memcpy(mgmt_cmd, msg, msg_len);
}

/**
 * mgmt_msg_len - calculate the total message length
 * @msg_data_len: the length of the message data
 *
 * Return the total message length
 **/
static u16 mgmt_msg_len(u16 msg_data_len)
{
        /* RSVD + HEADER_SIZE + DATA_LEN */
        u16 msg_len = MGMT_MSG_RSVD_FOR_DEV + sizeof(u64) + msg_data_len;

        if (msg_len > MGMT_MSG_LEN_MIN)
                msg_len = MGMT_MSG_LEN_MIN +
                           ALIGN((msg_len - MGMT_MSG_LEN_MIN),
                                 MGMT_MSG_LEN_STEP);
        else
                msg_len = MGMT_MSG_LEN_MIN;

        return msg_len;
}

/**
 * send_msg_to_mgmt - send message to mgmt by API CMD
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that will get the message
 * @cmd: command of the message
 * @data: the msg data
 * @data_len: the msg data length
 * @ack_type: ask for response
 * @direction: the direction of the original message
 * @resp_msg_id: msg id to response for
 *
 * Return 0 - Success, negative - Failure
 **/
static int send_msg_to_mgmt(struct hinic_pf_to_mgmt *pf_to_mgmt,
                            enum hinic_mod_type mod, u8 cmd,
                            u8 *data, u16 data_len,
                            enum msg_ack_type ack_type,
                            enum mgmt_direction_type direction,
                            u16 resp_msg_id)
{
        struct hinic_api_cmd_chain *chain;
        u64 header;
        u16 msg_id;

        msg_id = SYNC_MSG_ID(pf_to_mgmt);

        if (direction == MGMT_RESP) {
                header = prepare_header(pf_to_mgmt, data_len, mod, ack_type,
                                        direction, cmd, resp_msg_id);
        } else {
                SYNC_MSG_ID_INC(pf_to_mgmt);
                header = prepare_header(pf_to_mgmt, data_len, mod, ack_type,
                                        direction, cmd, msg_id);
        }

        prepare_mgmt_cmd(pf_to_mgmt->sync_msg_buf, &header, data, data_len);

        chain = pf_to_mgmt->cmd_chain[HINIC_API_CMD_WRITE_TO_MGMT_CPU];
        return hinic_api_cmd_write(chain, HINIC_NODE_ID_MGMT,
                                   pf_to_mgmt->sync_msg_buf,
                                   mgmt_msg_len(data_len));
}

/**
 * msg_to_mgmt_sync - send sync message to mgmt
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that will get the message
 * @cmd: command of the message
 * @buf_in: the msg data
 * @in_size: the msg data length
 * @buf_out: response
 * @out_size: response length
 * @direction: the direction of the original message
 * @resp_msg_id: msg id to response for
 * @timeout: time-out period of waiting for response
 *
 * Return 0 - Success, negative - Failure
 **/
static int msg_to_mgmt_sync(struct hinic_pf_to_mgmt *pf_to_mgmt,
                            enum hinic_mod_type mod, u8 cmd,
                            u8 *buf_in, u16 in_size,
                            u8 *buf_out, u16 *out_size,
                            enum mgmt_direction_type direction,
                            u16 resp_msg_id, u32 timeout)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;
        struct pci_dev *pdev = hwif->pdev;
        struct hinic_recv_msg *recv_msg;
        struct completion *recv_done;
        unsigned long timeo;
        u16 msg_id;
        int err;

        /* Lock the sync_msg_buf */
        down(&pf_to_mgmt->sync_msg_lock);

        recv_msg = &pf_to_mgmt->recv_resp_msg_from_mgmt;
        recv_done = &recv_msg->recv_done;

        if (resp_msg_id == MSG_NOT_RESP)
                msg_id = SYNC_MSG_ID(pf_to_mgmt);
        else
                msg_id = resp_msg_id;

        init_completion(recv_done);

        err = send_msg_to_mgmt(pf_to_mgmt, mod, cmd, buf_in, in_size,
                               MSG_ACK, direction, resp_msg_id);
        if (err) {
                dev_err(&pdev->dev, "Failed to send sync msg to mgmt\n");
                goto unlock_sync_msg;
        }

        timeo = msecs_to_jiffies(timeout ? timeout : MGMT_MSG_TIMEOUT);

        if (!wait_for_completion_timeout(recv_done, timeo)) {
                dev_err(&pdev->dev, "MGMT timeout, MSG id = %d\n", msg_id);
                hinic_dump_aeq_info(pf_to_mgmt->hwdev);
                err = -ETIMEDOUT;
                goto unlock_sync_msg;
        }

        smp_rmb();      /* verify reading after completion */

        if (recv_msg->msg_id != msg_id) {
                dev_err(&pdev->dev, "incorrect MSG for id = %d\n", msg_id);
                err = -EFAULT;
                goto unlock_sync_msg;
        }

        if (buf_out && recv_msg->msg_len <= MAX_PF_MGMT_BUF_SIZE) {
                memcpy(buf_out, recv_msg->msg, recv_msg->msg_len);
                *out_size = recv_msg->msg_len;
        }

unlock_sync_msg:
        up(&pf_to_mgmt->sync_msg_lock);
        return err;
}

/**
 * msg_to_mgmt_async - send message to mgmt without response
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that will get the message
 * @cmd: command of the message
 * @buf_in: the msg data
 * @in_size: the msg data length
 * @direction: the direction of the original message
 * @resp_msg_id: msg id to response for
 *
 * Return 0 - Success, negative - Failure
 **/
static int msg_to_mgmt_async(struct hinic_pf_to_mgmt *pf_to_mgmt,
                             enum hinic_mod_type mod, u8 cmd,
                             u8 *buf_in, u16 in_size,
                             enum mgmt_direction_type direction,
                             u16 resp_msg_id)
{
        int err;

        /* Lock the sync_msg_buf */
        down(&pf_to_mgmt->sync_msg_lock);

        err = send_msg_to_mgmt(pf_to_mgmt, mod, cmd, buf_in, in_size,
                               MSG_NO_ACK, direction, resp_msg_id);

        up(&pf_to_mgmt->sync_msg_lock);
        return err;
}

/**
 * hinic_msg_to_mgmt - send message to mgmt
 * @pf_to_mgmt: PF to MGMT channel
 * @mod: module in the chip that will get the message
 * @cmd: command of the message
 * @buf_in: the msg data
 * @in_size: the msg data length
 * @buf_out: response
 * @out_size: returned response length
 * @sync: sync msg or async msg
 *
 * Return 0 - Success, negative - Failure
 **/
int hinic_msg_to_mgmt(struct hinic_pf_to_mgmt *pf_to_mgmt,
                      enum hinic_mod_type mod, u8 cmd,
                      void *buf_in, u16 in_size, void *buf_out, u16 *out_size,
                      enum hinic_mgmt_msg_type sync)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;
        struct pci_dev *pdev = hwif->pdev;
        u32 timeout = 0;

        if (sync != HINIC_MGMT_MSG_SYNC) {
                dev_err(&pdev->dev, "Invalid MGMT msg type\n");
                return -EINVAL;
        }

        if (!MSG_SZ_IS_VALID(in_size)) {
                dev_err(&pdev->dev, "Invalid MGMT msg buffer size\n");
                return -EINVAL;
        }

        if (HINIC_IS_VF(hwif)) {
                if (cmd == HINIC_PORT_CMD_SET_FUNC_STATE)
                        timeout = SET_FUNC_PORT_MBOX_TIMEOUT;

                return hinic_mbox_to_pf(pf_to_mgmt->hwdev, mod, cmd, buf_in,
                                        in_size, buf_out, out_size, timeout);
        } else {
                if (cmd == HINIC_PORT_CMD_SET_FUNC_STATE)
                        timeout = SET_FUNC_PORT_MGMT_TIMEOUT;
                else if (cmd == HINIC_PORT_CMD_UPDATE_FW)
                        timeout = UPDATE_FW_MGMT_TIMEOUT;

                return msg_to_mgmt_sync(pf_to_mgmt, mod, cmd, buf_in, in_size,
                                buf_out, out_size, MGMT_DIRECT_SEND,
                                MSG_NOT_RESP, timeout);
        }
}

static void recv_mgmt_msg_work_handler(struct work_struct *work)
{
        struct hinic_mgmt_msg_handle_work *mgmt_work =
                container_of(work, struct hinic_mgmt_msg_handle_work, work);
        struct hinic_pf_to_mgmt *pf_to_mgmt = mgmt_work->pf_to_mgmt;
        struct pci_dev *pdev = pf_to_mgmt->hwif->pdev;
        u8 *buf_out = pf_to_mgmt->mgmt_ack_buf;
        struct hinic_mgmt_cb *mgmt_cb;
        unsigned long cb_state;
        u16 out_size = 0;

        memset(buf_out, 0, MAX_PF_MGMT_BUF_SIZE);

        if (mgmt_work->mod >= HINIC_MOD_MAX) {
                dev_err(&pdev->dev, "Unknown MGMT MSG module = %d\n",
                        mgmt_work->mod);
                kfree(mgmt_work->msg);
                kfree(mgmt_work);
                return;
        }

        mgmt_cb = &pf_to_mgmt->mgmt_cb[mgmt_work->mod];

        cb_state = cmpxchg(&mgmt_cb->state,
                           HINIC_MGMT_CB_ENABLED,
                           HINIC_MGMT_CB_ENABLED | HINIC_MGMT_CB_RUNNING);

        if (cb_state == HINIC_MGMT_CB_ENABLED && mgmt_cb->cb)
                mgmt_cb->cb(mgmt_cb->handle, mgmt_work->cmd,
                            mgmt_work->msg, mgmt_work->msg_len,
                            buf_out, &out_size);
        else
                dev_err(&pdev->dev, "No MGMT msg handler, mod: %d, cmd: %d\n",
                        mgmt_work->mod, mgmt_work->cmd);

        mgmt_cb->state &= ~HINIC_MGMT_CB_RUNNING;

        if (!mgmt_work->async_mgmt_to_pf)
                /* MGMT sent sync msg, send the response */
                msg_to_mgmt_async(pf_to_mgmt, mgmt_work->mod, mgmt_work->cmd,
                                  buf_out, out_size, MGMT_RESP,
                                  mgmt_work->msg_id);

        kfree(mgmt_work->msg);
        kfree(mgmt_work);
}

/**
 * mgmt_recv_msg_handler - handler for message from mgmt cpu
 * @pf_to_mgmt: PF to MGMT channel
 * @recv_msg: received message details
 **/
static void mgmt_recv_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
                                  struct hinic_recv_msg *recv_msg)
{
        struct hinic_mgmt_msg_handle_work *mgmt_work = NULL;

        mgmt_work = kzalloc(sizeof(*mgmt_work), GFP_KERNEL);
        if (!mgmt_work)
                return;

        if (recv_msg->msg_len) {
                mgmt_work->msg = kzalloc(recv_msg->msg_len, GFP_KERNEL);
                if (!mgmt_work->msg) {
                        kfree(mgmt_work);
                        return;
                }
        }

        mgmt_work->pf_to_mgmt = pf_to_mgmt;
        mgmt_work->msg_len = recv_msg->msg_len;
        memcpy(mgmt_work->msg, recv_msg->msg, recv_msg->msg_len);
        mgmt_work->msg_id = recv_msg->msg_id;
        mgmt_work->mod = recv_msg->mod;
        mgmt_work->cmd = recv_msg->cmd;
        mgmt_work->async_mgmt_to_pf = recv_msg->async_mgmt_to_pf;

        INIT_WORK(&mgmt_work->work, recv_mgmt_msg_work_handler);
        queue_work(pf_to_mgmt->workq, &mgmt_work->work);
}

/**
 * mgmt_resp_msg_handler - handler for a response message from mgmt cpu
 * @pf_to_mgmt: PF to MGMT channel
 * @recv_msg: received message details
 **/
static void mgmt_resp_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
                                  struct hinic_recv_msg *recv_msg)
{
        wmb();  /* verify writing all, before reading */

        complete(&recv_msg->recv_done);
}

/**
 * recv_mgmt_msg_handler - handler for a message from mgmt cpu
 * @pf_to_mgmt: PF to MGMT channel
 * @header: the header of the message
 * @recv_msg: received message details
 **/
static void recv_mgmt_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
                                  u64 *header, struct hinic_recv_msg *recv_msg)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;
        struct pci_dev *pdev = hwif->pdev;
        int seq_id, seg_len;
        u8 *msg_body;

        seq_id = HINIC_MSG_HEADER_GET(*header, SEQID);
        seg_len = HINIC_MSG_HEADER_GET(*header, SEG_LEN);

        if (seq_id >= (MAX_MSG_LEN / SEGMENT_LEN)) {
                dev_err(&pdev->dev, "recv big mgmt msg\n");
                return;
        }

        msg_body = (u8 *)header + sizeof(*header);
        memcpy(recv_msg->msg + seq_id * SEGMENT_LEN, msg_body, seg_len);

        if (!HINIC_MSG_HEADER_GET(*header, LAST))
                return;

        recv_msg->cmd = HINIC_MSG_HEADER_GET(*header, CMD);
        recv_msg->mod = HINIC_MSG_HEADER_GET(*header, MODULE);
        recv_msg->async_mgmt_to_pf = HINIC_MSG_HEADER_GET(*header,
                                                          ASYNC_MGMT_TO_PF);
        recv_msg->msg_len = HINIC_MSG_HEADER_GET(*header, MSG_LEN);
        recv_msg->msg_id = HINIC_MSG_HEADER_GET(*header, MSG_ID);

        if (HINIC_MSG_HEADER_GET(*header, DIRECTION) == MGMT_RESP)
                mgmt_resp_msg_handler(pf_to_mgmt, recv_msg);
        else
                mgmt_recv_msg_handler(pf_to_mgmt, recv_msg);
}

/**
 * mgmt_msg_aeqe_handler - handler for a mgmt message event
 * @handle: PF to MGMT channel
 * @data: the header of the message
 * @size: unused
 **/
static void mgmt_msg_aeqe_handler(void *handle, void *data, u8 size)
{
        struct hinic_pf_to_mgmt *pf_to_mgmt = handle;
        struct hinic_recv_msg *recv_msg;
        u64 *header = (u64 *)data;

        recv_msg = HINIC_MSG_HEADER_GET(*header, DIRECTION) ==
                   MGMT_DIRECT_SEND ?
                   &pf_to_mgmt->recv_msg_from_mgmt :
                   &pf_to_mgmt->recv_resp_msg_from_mgmt;

        recv_mgmt_msg_handler(pf_to_mgmt, header, recv_msg);
}

/**
 * alloc_recv_msg - allocate receive message memory
 * @pf_to_mgmt: PF to MGMT channel
 * @recv_msg: pointer that will hold the allocated data
 *
 * Return 0 - Success, negative - Failure
 **/
static int alloc_recv_msg(struct hinic_pf_to_mgmt *pf_to_mgmt,
                          struct hinic_recv_msg *recv_msg)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;
        struct pci_dev *pdev = hwif->pdev;

        recv_msg->msg = devm_kzalloc(&pdev->dev, MAX_PF_MGMT_BUF_SIZE,
                                     GFP_KERNEL);
        if (!recv_msg->msg)
                return -ENOMEM;

        recv_msg->buf_out = devm_kzalloc(&pdev->dev, MAX_PF_MGMT_BUF_SIZE,
                                         GFP_KERNEL);
        if (!recv_msg->buf_out)
                return -ENOMEM;

        return 0;
}

/**
 * alloc_msg_buf - allocate all the message buffers of PF to MGMT channel
 * @pf_to_mgmt: PF to MGMT channel
 *
 * Return 0 - Success, negative - Failure
 **/
static int alloc_msg_buf(struct hinic_pf_to_mgmt *pf_to_mgmt)
{
        struct hinic_hwif *hwif = pf_to_mgmt->hwif;
        struct pci_dev *pdev = hwif->pdev;
        int err;

        err = alloc_recv_msg(pf_to_mgmt,
                             &pf_to_mgmt->recv_msg_from_mgmt);
        if (err) {
                dev_err(&pdev->dev, "Failed to allocate recv msg\n");
                return err;
        }

        err = alloc_recv_msg(pf_to_mgmt,
                             &pf_to_mgmt->recv_resp_msg_from_mgmt);
        if (err) {
                dev_err(&pdev->dev, "Failed to allocate resp recv msg\n");
                return err;
        }

        pf_to_mgmt->sync_msg_buf = devm_kzalloc(&pdev->dev,
                                                MAX_PF_MGMT_BUF_SIZE,
                                                GFP_KERNEL);
        if (!pf_to_mgmt->sync_msg_buf)
                return -ENOMEM;

        pf_to_mgmt->mgmt_ack_buf = devm_kzalloc(&pdev->dev,
                                                MAX_PF_MGMT_BUF_SIZE,
                                                GFP_KERNEL);
        if (!pf_to_mgmt->mgmt_ack_buf)
                return -ENOMEM;

        return 0;
}

/**
 * hinic_pf_to_mgmt_init - initialize PF to MGMT channel
 * @pf_to_mgmt: PF to MGMT channel
 * @hwif: HW interface the PF to MGMT will use for accessing HW
 *
 * Return 0 - Success, negative - Failure
 **/
int hinic_pf_to_mgmt_init(struct hinic_pf_to_mgmt *pf_to_mgmt,
                          struct hinic_hwif *hwif)
{
        struct hinic_pfhwdev *pfhwdev = mgmt_to_pfhwdev(pf_to_mgmt);
        struct hinic_hwdev *hwdev = &pfhwdev->hwdev;
        struct pci_dev *pdev = hwif->pdev;
        int err;

        pf_to_mgmt->hwif = hwif;
        pf_to_mgmt->hwdev = hwdev;

        if (HINIC_IS_VF(hwif))
                return 0;

        err = hinic_health_reporters_create(hwdev->devlink_dev);
        if (err)
                return err;

        sema_init(&pf_to_mgmt->sync_msg_lock, 1);
        pf_to_mgmt->workq = create_singlethread_workqueue("hinic_mgmt");
        if (!pf_to_mgmt->workq) {
                dev_err(&pdev->dev, "Failed to initialize MGMT workqueue\n");
                hinic_health_reporters_destroy(hwdev->devlink_dev);
                return -ENOMEM;
        }
        pf_to_mgmt->sync_msg_id = 0;

        err = alloc_msg_buf(pf_to_mgmt);
        if (err) {
                dev_err(&pdev->dev, "Failed to allocate msg buffers\n");
                hinic_health_reporters_destroy(hwdev->devlink_dev);
                return err;
        }

        err = hinic_api_cmd_init(pf_to_mgmt->cmd_chain, hwif);
        if (err) {
                dev_err(&pdev->dev, "Failed to initialize cmd chains\n");
                hinic_health_reporters_destroy(hwdev->devlink_dev);
                return err;
        }

        hinic_aeq_register_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU,
                                 pf_to_mgmt,
                                 mgmt_msg_aeqe_handler);
        return 0;
}

/**
 * hinic_pf_to_mgmt_free - free PF to MGMT channel
 * @pf_to_mgmt: PF to MGMT channel
 **/
void hinic_pf_to_mgmt_free(struct hinic_pf_to_mgmt *pf_to_mgmt)
{
        struct hinic_pfhwdev *pfhwdev = mgmt_to_pfhwdev(pf_to_mgmt);
        struct hinic_hwdev *hwdev = &pfhwdev->hwdev;

        if (HINIC_IS_VF(hwdev->hwif))
                return;

        hinic_aeq_unregister_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU);
        hinic_api_cmd_free(pf_to_mgmt->cmd_chain);
        destroy_workqueue(pf_to_mgmt->workq);
        hinic_health_reporters_destroy(hwdev->devlink_dev);
}