// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/* Copyright 2013-2016 Freescale Semiconductor Inc.
 * Copyright 2019 NXP
 */
#include <linux/fsl/mc.h>
#include "dpmac.h"
#include "dpmac-cmd.h"

/**
 * dpmac_open() - Open a control session for the specified object.
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @dpmac_id:   DPMAC unique ID
 * @token:      Returned token; use in subsequent API calls
 *
 * This function can be used to open a control session for an
 * already created object; an object may have been declared in
 * the DPL or by calling the dpmac_create function.
 * This function returns a unique authentication token,
 * associated with the specific object ID and the specific MC
 * portal; this token must be used in all subsequent commands for
 * this specific object
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpmac_open(struct fsl_mc_io *mc_io,
               u32 cmd_flags,
               int dpmac_id,
               u16 *token)
{
        struct dpmac_cmd_open *cmd_params;
        struct fsl_mc_command cmd = { 0 };
        int err;

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_OPEN,
                                          cmd_flags,
                                          0);
        cmd_params = (struct dpmac_cmd_open *)cmd.params;
        cmd_params->dpmac_id = cpu_to_le32(dpmac_id);

        /* send command to mc*/
        err = mc_send_command(mc_io, &cmd);
        if (err)
                return err;

        /* retrieve response parameters */
        *token = mc_cmd_hdr_read_token(&cmd);

        return err;
}

/**
 * dpmac_close() - Close the control session of the object
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPMAC object
 *
 * After this function is called, no further operations are
 * allowed on the object without opening a new control session.
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpmac_close(struct fsl_mc_io *mc_io,
                u32 cmd_flags,
                u16 token)
{
        struct fsl_mc_command cmd = { 0 };

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_CLOSE, cmd_flags,
                                          token);

        /* send command to mc*/
        return mc_send_command(mc_io, &cmd);
}

/**
 * dpmac_get_attributes - Retrieve DPMAC attributes.
 *
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPMAC object
 * @attr:       Returned object's attributes
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpmac_get_attributes(struct fsl_mc_io *mc_io,
                         u32 cmd_flags,
                         u16 token,
                         struct dpmac_attr *attr)
{
        struct dpmac_rsp_get_attributes *rsp_params;
        struct fsl_mc_command cmd = { 0 };
        int err;

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_ATTR,
                                          cmd_flags,
                                          token);

        /* send command to mc*/
        err = mc_send_command(mc_io, &cmd);
        if (err)
                return err;

        /* retrieve response parameters */
        rsp_params = (struct dpmac_rsp_get_attributes *)cmd.params;
        attr->eth_if = rsp_params->eth_if;
        attr->link_type = rsp_params->link_type;
        attr->id = le16_to_cpu(rsp_params->id);
        attr->max_rate = le32_to_cpu(rsp_params->max_rate);

        return 0;
}

/**
 * dpmac_set_link_state() - Set the Ethernet link status
 * @mc_io:      Pointer to opaque I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPMAC object
 * @link_state: Link state configuration
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpmac_set_link_state(struct fsl_mc_io *mc_io,
                         u32 cmd_flags,
                         u16 token,
                         struct dpmac_link_state *link_state)
{
        struct dpmac_cmd_set_link_state *cmd_params;
        struct fsl_mc_command cmd = { 0 };

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_SET_LINK_STATE,
                                          cmd_flags,
                                          token);
        cmd_params = (struct dpmac_cmd_set_link_state *)cmd.params;
        cmd_params->options = cpu_to_le64(link_state->options);
        cmd_params->rate = cpu_to_le32(link_state->rate);
        dpmac_set_field(cmd_params->state, STATE, link_state->up);
        dpmac_set_field(cmd_params->state, STATE_VALID,
                        link_state->state_valid);
        cmd_params->supported = cpu_to_le64(link_state->supported);
        cmd_params->advertising = cpu_to_le64(link_state->advertising);

        /* send command to mc*/
        return mc_send_command(mc_io, &cmd);
}

/**
 * dpmac_get_counter() - Read a specific DPMAC counter
 * @mc_io:      Pointer to opaque I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPMAC object
 * @id:         The requested counter ID
 * @value:      Returned counter value
 *
 * Return:      The requested counter; '0' otherwise.
 */
int dpmac_get_counter(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
                      enum dpmac_counter_id id, u64 *value)
{
        struct dpmac_cmd_get_counter *dpmac_cmd;
        struct dpmac_rsp_get_counter *dpmac_rsp;
        struct fsl_mc_command cmd = { 0 };
        int err = 0;

        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_COUNTER,
                                          cmd_flags,
                                          token);
        dpmac_cmd = (struct dpmac_cmd_get_counter *)cmd.params;
        dpmac_cmd->id = id;

        err = mc_send_command(mc_io, &cmd);
        if (err)
                return err;

        dpmac_rsp = (struct dpmac_rsp_get_counter *)cmd.params;
        *value = le64_to_cpu(dpmac_rsp->counter);

        return 0;
}

/**
 * dpmac_get_api_version() - Get Data Path MAC version
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @major_ver:  Major version of data path mac API
 * @minor_ver:  Minor version of data path mac API
 *
 * Return:  '0' on Success; Error code otherwise.
 */
int dpmac_get_api_version(struct fsl_mc_io *mc_io, u32 cmd_flags,
                          u16 *major_ver, u16 *minor_ver)
{
        struct dpmac_rsp_get_api_version *rsp_params;
        struct fsl_mc_command cmd = { 0 };
        int err;

        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_GET_API_VERSION,
                                          cmd_flags,
                                          0);

        err = mc_send_command(mc_io, &cmd);
        if (err)
                return err;

        rsp_params = (struct dpmac_rsp_get_api_version *)cmd.params;
        *major_ver = le16_to_cpu(rsp_params->major);
        *minor_ver = le16_to_cpu(rsp_params->minor);

        return 0;
}

/**
 * dpmac_set_protocol() - Reconfigure the DPMAC protocol
 * @mc_io:      Pointer to opaque I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPMAC object
 * @protocol:   New protocol for the DPMAC to be reconfigured in.
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpmac_set_protocol(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token,
                       enum dpmac_eth_if protocol)
{
        struct dpmac_cmd_set_protocol *cmd_params;
        struct fsl_mc_command cmd = { 0 };

        cmd.header = mc_encode_cmd_header(DPMAC_CMDID_SET_PROTOCOL,
                                          cmd_flags, token);
        cmd_params = (struct dpmac_cmd_set_protocol *)cmd.params;
        cmd_params->eth_if = protocol;

        return mc_send_command(mc_io, &cmd);
}