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

#include "dpio.h"
#include "dpio-cmd.h"

/*
 * Data Path I/O Portal API
 * Contains initialization APIs and runtime control APIs for DPIO
 */

/**
 * dpio_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_'
 * @dpio_id:    DPIO 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 dpio_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 dpio_open(struct fsl_mc_io *mc_io,
              u32 cmd_flags,
              int dpio_id,
              u16 *token)
{
        struct fsl_mc_command cmd = { 0 };
        struct dpio_cmd_open *dpio_cmd;
        int err;

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPIO_CMDID_OPEN,
                                          cmd_flags,
                                          0);
        dpio_cmd = (struct dpio_cmd_open *)cmd.params;
        dpio_cmd->dpio_id = cpu_to_le32(dpio_id);

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

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

        return 0;
}

/**
 * dpio_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 DPIO object
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpio_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(DPIO_CMDID_CLOSE,
                                          cmd_flags,
                                          token);

        return mc_send_command(mc_io, &cmd);
}

/**
 * dpio_enable() - Enable the DPIO, allow I/O portal operations.
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPIO object
 *
 * Return:      '0' on Success; Error code otherwise
 */
int dpio_enable(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(DPIO_CMDID_ENABLE,
                                          cmd_flags,
                                          token);

        return mc_send_command(mc_io, &cmd);
}

/**
 * dpio_disable() - Disable the DPIO, stop any I/O portal operation.
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPIO object
 *
 * Return:      '0' on Success; Error code otherwise
 */
int dpio_disable(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(DPIO_CMDID_DISABLE,
                                          cmd_flags,
                                          token);

        return mc_send_command(mc_io, &cmd);
}

/**
 * dpio_get_attributes() - Retrieve DPIO 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 DPIO object
 * @attr:       Returned object's attributes
 *
 * Return:      '0' on Success; Error code otherwise
 */
int dpio_get_attributes(struct fsl_mc_io *mc_io,
                        u32 cmd_flags,
                        u16 token,
                        struct dpio_attr *attr)
{
        struct fsl_mc_command cmd = { 0 };
        struct dpio_rsp_get_attr *dpio_rsp;
        int err;

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

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

        /* retrieve response parameters */
        dpio_rsp = (struct dpio_rsp_get_attr *)cmd.params;
        attr->id = le32_to_cpu(dpio_rsp->id);
        attr->qbman_portal_id = le16_to_cpu(dpio_rsp->qbman_portal_id);
        attr->num_priorities = dpio_rsp->num_priorities;
        attr->channel_mode = dpio_rsp->channel_mode & DPIO_CHANNEL_MODE_MASK;
        attr->qbman_portal_ce_offset =
                le64_to_cpu(dpio_rsp->qbman_portal_ce_addr);
        attr->qbman_portal_ci_offset =
                le64_to_cpu(dpio_rsp->qbman_portal_ci_addr);
        attr->qbman_version = le32_to_cpu(dpio_rsp->qbman_version);
        attr->clk = le32_to_cpu(dpio_rsp->clk);

        return 0;
}

int dpio_set_stashing_destination(struct fsl_mc_io *mc_io,
                                  u32 cmd_flags,
                                  u16 token,
                                  u8 sdest)
{
        struct fsl_mc_command cmd = { 0 };
        struct dpio_stashing_dest *dpio_cmd;

        cmd.header = mc_encode_cmd_header(DPIO_CMDID_SET_STASHING_DEST,
                                          cmd_flags, token);
        dpio_cmd = (struct dpio_stashing_dest *)cmd.params;
        dpio_cmd->sdest = sdest;

        return mc_send_command(mc_io, &cmd);
}

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

        /* prepare command */
        cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_API_VERSION,
                                          cmd_flags, 0);

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

        /* retrieve response parameters */
        mc_cmd_read_api_version(&cmd, major_ver, minor_ver);

        return 0;
}

/**
 * dpio_reset() - Reset the DPIO, returns the object to initial state.
 * @mc_io:      Pointer to MC portal's I/O object
 * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:      Token of DPIO object
 *
 * Return:      '0' on Success; Error code otherwise.
 */
int dpio_reset(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(DPIO_CMDID_RESET,
                                          cmd_flags,
                                          token);

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