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// 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);
return 0;
}
/**
* 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);
}
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