199 lines
5 KiB
C
Executable file
199 lines
5 KiB
C
Executable file
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
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/*
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* Copyright 2013-2016 Freescale Semiconductor Inc.
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* Copyright 2016 NXP
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*
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*/
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#include <linux/kernel.h>
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#include <linux/fsl/mc.h>
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#include "dpio.h"
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#include "dpio-cmd.h"
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/*
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* Data Path I/O Portal API
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* Contains initialization APIs and runtime control APIs for DPIO
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*/
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/**
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* dpio_open() - Open a control session for the specified object
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @dpio_id: DPIO unique ID
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* @token: Returned token; use in subsequent API calls
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*
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* This function can be used to open a control session for an
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* already created object; an object may have been declared in
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* the DPL or by calling the dpio_create() function.
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* This function returns a unique authentication token,
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* associated with the specific object ID and the specific MC
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* portal; this token must be used in all subsequent commands for
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* this specific object.
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dpio_open(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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int dpio_id,
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u16 *token)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dpio_cmd_open *dpio_cmd;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_OPEN,
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cmd_flags,
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0);
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dpio_cmd = (struct dpio_cmd_open *)cmd.params;
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dpio_cmd->dpio_id = cpu_to_le32(dpio_id);
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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*token = mc_cmd_hdr_read_token(&cmd);
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return 0;
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}
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/**
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* dpio_close() - Close the control session of the object
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @token: Token of DPIO object
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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int dpio_close(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_CLOSE,
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cmd_flags,
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token);
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dpio_enable() - Enable the DPIO, allow I/O portal operations.
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @token: Token of DPIO object
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*
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* Return: '0' on Success; Error code otherwise
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*/
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int dpio_enable(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_ENABLE,
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cmd_flags,
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token);
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dpio_disable() - Disable the DPIO, stop any I/O portal operation.
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @token: Token of DPIO object
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*
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* Return: '0' on Success; Error code otherwise
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*/
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int dpio_disable(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_DISABLE,
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cmd_flags,
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token);
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return mc_send_command(mc_io, &cmd);
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}
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/**
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* dpio_get_attributes() - Retrieve DPIO attributes
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @token: Token of DPIO object
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* @attr: Returned object's attributes
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*
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* Return: '0' on Success; Error code otherwise
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*/
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int dpio_get_attributes(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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struct dpio_attr *attr)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dpio_rsp_get_attr *dpio_rsp;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_ATTR,
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cmd_flags,
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token);
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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dpio_rsp = (struct dpio_rsp_get_attr *)cmd.params;
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attr->id = le32_to_cpu(dpio_rsp->id);
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attr->qbman_portal_id = le16_to_cpu(dpio_rsp->qbman_portal_id);
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attr->num_priorities = dpio_rsp->num_priorities;
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attr->channel_mode = dpio_rsp->channel_mode & DPIO_CHANNEL_MODE_MASK;
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attr->qbman_portal_ce_offset =
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le64_to_cpu(dpio_rsp->qbman_portal_ce_addr);
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attr->qbman_portal_ci_offset =
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le64_to_cpu(dpio_rsp->qbman_portal_ci_addr);
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attr->qbman_version = le32_to_cpu(dpio_rsp->qbman_version);
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return 0;
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}
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/**
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* dpio_get_api_version - Get Data Path I/O API version
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* @mc_io: Pointer to MC portal's DPIO object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @major_ver: Major version of DPIO API
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* @minor_ver: Minor version of DPIO API
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*
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* Return: '0' on Success; Error code otherwise
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*/
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int dpio_get_api_version(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 *major_ver,
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u16 *minor_ver)
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{
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struct fsl_mc_command cmd = { 0 };
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_API_VERSION,
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cmd_flags, 0);
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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mc_cmd_read_api_version(&cmd, major_ver, minor_ver);
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return 0;
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}
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