text: /* Copyright 2013-2016 Freescale Semiconductor Inc.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   * * Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   * * Neither the name of the above-listed copyright holders nor the
   * names of any contributors may be used to endorse or promote products
   * derived from this software without specific prior written permission.
   *
   *
   * ALTERNATIVELY, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") as published by the Free Software
   * Foundation, either version 2 of that License or (at your option) any
   * later version.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  #include <fsl_mc_sys.h>
  #include <fsl_mc_cmd.h>
  #include <fsl_dpdcei.h>
  #include <fsl_dpdcei_cmd.h>
  
  /** @addtogroup dpdcei
   * @{
   */
  
  /**
   * dpdcei_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_'
   * @token:	Token of DPDCEI object
   * @dpdcei_id:	DPDCEI unique ID
   *
   * 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 dpdcei_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 dpdcei_open(struct fsl_mc_io *mc_io,
  		uint32_t cmd_flags,
  		int dpdcei_id,
  		uint16_t *token)
  {
  	struct dpdcei_cmd_open *cmd_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_OPEN,
  					  cmd_flags,
  					  0);
  	cmd_params = (struct dpdcei_cmd_open *)cmd.params;
  	cmd_params->dpdcei_id = cpu_to_le32(dpdcei_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 0;
  }
  
  /**
   * dpdcei_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 DPDCEI 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 dpdcei_close(struct fsl_mc_io *mc_io,
  		 uint32_t cmd_flags,
  		 uint16_t token)
  {
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_CLOSE,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_create() - Create the DPDCEI object
   * @mc_io:	Pointer to MC portal's I/O object
   * @dprc_token:	Parent container token; '0' for default container
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @cfg:	Configuration parameters
   * @obj_id:	Returned object id
   *
   * Create the DPDCEI object, allocate required resources and
   * perform required initialization.
   *
   * The object can be created either by declaring it in the
   * DPL file, or by calling this function.
   *
   * The function accepts an authentication token of a parent
   * container that this object should be assigned to. The token
   * can be '0' so the object will be assigned to the default container.
   * The newly created object can be opened with the returned
   * object id and using the container's associated tokens and MC portals.
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_create(struct fsl_mc_io *mc_io,
  		  uint16_t dprc_token,
  		  uint32_t cmd_flags,
  		  const struct dpdcei_cfg *cfg,
  		  uint32_t *obj_id)
  {
  	struct dpdcei_cmd_create *cmd_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_CREATE,
  					  cmd_flags,
  					  dprc_token);
  	cmd_params = (struct dpdcei_cmd_create *)cmd.params;
  	cmd_params->engine = cfg->engine;
  	cmd_params->priority = cfg->priority;
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	*obj_id = mc_cmd_read_object_id(&cmd);
  
  	return 0;
  }
  
  /**
   * dpdcei_destroy() - Destroy the DPDCEI object and release all its resources.
   * @mc_io:	Pointer to MC portal's I/O object
   * @dprc_token:	Parent container token; '0' for default container
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @object_id:	The object id; it must be a valid id within the container that
   * created this object;
   *
   * Return:	'0' on Success; error code otherwise.
   */
  int dpdcei_destroy(struct fsl_mc_io *mc_io,
  		   uint16_t dprc_token,
  		   uint32_t cmd_flags,
  		   uint32_t object_id)
  {
  	struct dpdcei_cmd_destroy *cmd_params;
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_DESTROY,
  					  cmd_flags,
  					  dprc_token);
  	cmd_params = (struct dpdcei_cmd_destroy *)cmd.params;
  	cmd_params->dpdcei_id = cpu_to_le32(object_id);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_enable() - Enable the DPDCEI, allow sending and receiving frames.
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_enable(struct fsl_mc_io *mc_io,
  		  uint32_t cmd_flags,
  		  uint16_t token)
  {
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_ENABLE,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_disable() - Disable the DPDCEI, stop sending and receiving frames.
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_disable(struct fsl_mc_io *mc_io,
  		   uint32_t cmd_flags,
  		   uint16_t token)
  {
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_DISABLE,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_is_enabled() - Check if the DPDCEI is enabled.
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   * @en:		Return '1' for object enabled/'0' otherwise
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_is_enabled(struct fsl_mc_io *mc_io,
  		      uint32_t cmd_flags,
  		      uint16_t token,
  		      int *en)
  {
  	struct dpdcei_rsp_is_enabled *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_IS_ENABLED,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_is_enabled *)cmd.params;
  	*en = dpdcei_get_field(rsp_params->en, ENABLE);
  
  	return 0;
  }
  
  /**
   * dpdcei_reset() - Reset the DPDCEI, 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 DPDCEI object
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_reset(struct fsl_mc_io *mc_io,
  		 uint32_t cmd_flags,
  		 uint16_t token)
  {
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_RESET,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_set_irq_enable() - Set overall interrupt 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 DPCI object
   * @irq_index:	The interrupt index to configure
   * @en:		Interrupt state - enable = 1, disable = 0
   *
   * Allows GPP software to control when interrupts are generated.
   * Each interrupt can have up to 32 causes.  The enable/disable control's the
   * overall interrupt state. if the interrupt is disabled no causes will cause
   * an interrupt
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_irq_enable(struct fsl_mc_io *mc_io,
  			  uint32_t cmd_flags,
  			  uint16_t token,
  			  uint8_t irq_index,
  			  uint8_t *en)
  {
  	struct dpdcei_cmd_get_irq_enable *cmd_params;
  	struct dpdcei_rsp_get_irq_enable *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_IRQ_ENABLE,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_get_irq_enable *)cmd.params;
  	cmd_params->irq_index = irq_index;
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_get_irq_enable *)cmd.params;
  	*en = rsp_params->enable_state;
  
  	return 0;
  }
  
  /**
   * dpdcei_get_irq_enable() - Get overall interrupt 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 DPDCEI object
   * @irq_index:	The interrupt index to configure
   * @en:		Returned Interrupt state - enable = 1, disable = 0
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_set_irq_enable(struct fsl_mc_io *mc_io,
  			  uint32_t cmd_flags,
  			  uint16_t token,
  			  uint8_t irq_index,
  			  uint8_t en)
  {
  	struct dpdcei_cmd_set_irq_enable *cmd_params;
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_SET_IRQ_ENABLE,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_set_irq_enable *)cmd.params;
  	cmd_params->enable_state = en;
  	cmd_params->irq_index = irq_index;
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_get_irq_mask() - Get interrupt mask.
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   * @irq_index:	The interrupt index to configure
   * @mask:	Returned event mask to trigger interrupt
   *
   * Every interrupt can have up to 32 causes and the interrupt model supports
   * masking/unmasking each cause independently
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_irq_mask(struct fsl_mc_io *mc_io,
  			uint32_t cmd_flags,
  			uint16_t token,
  			uint8_t irq_index,
  			uint32_t *mask)
  {
  	struct dpdcei_cmd_get_irq_mask *cmd_params;
  	struct dpdcei_rsp_get_irq_mask *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_IRQ_MASK,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_get_irq_mask *)cmd.params;
  	cmd_params->irq_index = irq_index;
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_get_irq_mask *)cmd.params;
  	*mask = le32_to_cpu(rsp_params->mask);
  
  	return 0;
  }
  
  /**
   * dpdcei_set_irq_mask() - Set interrupt mask.
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPCI object
   * @irq_index:	The interrupt index to configure
   * @mask:	Event mask to trigger interrupt;
   *		each bit:
   *			0 = ignore event
   *			1 = consider event for asserting IRQ
   *
   * Every interrupt can have up to 32 causes and the interrupt model supports
   * masking/unmasking each cause independently
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_set_irq_mask(struct fsl_mc_io *mc_io,
  			uint32_t cmd_flags,
  			uint16_t token,
  			uint8_t irq_index,
  			uint32_t mask)
  {
  	struct dpdcei_cmd_set_irq_mask *cmd_params;
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_SET_IRQ_MASK,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_set_irq_mask *)cmd.params;
  	cmd_params->irq_index = irq_index;
  	cmd_params->mask = cpu_to_le32(mask);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_get_irq_status() - Get the current status of any pending interrupts
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   * @irq_index:	The interrupt index to configure
   * @status:	Returned interrupts status - one bit per cause:
   *			0 = no interrupt pending
   *			1 = interrupt pending
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_irq_status(struct fsl_mc_io *mc_io,
  			  uint32_t cmd_flags,
  			  uint16_t token,
  			  uint8_t irq_index,
  			  uint32_t *status)
  {
  	struct dpdcei_cmd_irq_status *cmd_params;
  	struct dpdcei_rsp_get_irq_status *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_IRQ_STATUS,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_irq_status *)cmd.params;
  	cmd_params->irq_index = irq_index;
  	cmd_params->status = cpu_to_le32(*status);
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_get_irq_status *)cmd.params;
  	*status = le32_to_cpu(rsp_params->status);
  
  	return 0;
  }
  
  /**
   * dpdcei_clear_irq_status() - Clear a pending interrupt's status
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   * @irq_index:	The interrupt index to configure
   * @status:	Bits to clear (W1C) - one bit per cause:
   *			0 = don't change
   *			1 = clear status bit
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_clear_irq_status(struct fsl_mc_io *mc_io,
  			    uint32_t cmd_flags,
  			    uint16_t token,
  			    uint8_t irq_index,
  			    uint32_t status)
  {
  	struct dpdcei_cmd_irq_status *cmd_params;
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_CLEAR_IRQ_STATUS,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_irq_status *)cmd.params;
  	cmd_params->irq_index = irq_index;
  	cmd_params->status = cpu_to_le32(status);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_get_attributes() - Retrieve DPDCEI 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 DPDCEI object
   * @attr:	Returned  object's attributes
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_attributes(struct fsl_mc_io *mc_io,
  			  uint32_t cmd_flags,
  			  uint16_t token,
  			  struct dpdcei_attr *attr)
  {
  	struct dpdcei_rsp_get_attr *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_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 dpdcei_rsp_get_attr *)cmd.params;
  	attr->id = le32_to_cpu(rsp_params->id);
  	attr->engine = rsp_params->dpdcei_engine;
  	attr->dce_version = le64_to_cpu(rsp_params->dce_version);
  
  	return 0;
  }
  
  /**
   * dpdcei_set_rx_queue() - Set Rx queue configuration
   * @mc_io:	Pointer to MC portal's I/O object
   * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
   * @token:	Token of DPDCEI object
   * @cfg:	Rx queue configuration
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_set_rx_queue(struct fsl_mc_io *mc_io,
  			uint32_t cmd_flags,
  			uint16_t token,
  			const struct dpdcei_rx_queue_cfg *cfg)
  {
  	struct dpdcei_cmd_set_rx_queue *cmd_params;
  	struct mc_command cmd = { 0 };
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_SET_RX_QUEUE,
  					  cmd_flags,
  					  token);
  	cmd_params = (struct dpdcei_cmd_set_rx_queue *)cmd.params;
  	cmd_params->options = cpu_to_le32(cfg->options);
  	cmd_params->user_ctx = cpu_to_le64(cfg->user_ctx);
  	cmd_params->dest_id = cpu_to_le32(cfg->dest_cfg.dest_id);
  	cmd_params->dest_priority = cfg->dest_cfg.priority;
  	dpdcei_set_field(cmd_params->dest_type,
  			 DEST_TYPE,
  			 cfg->dest_cfg.dest_type);
  
  	/* send command to mc*/
  	return mc_send_command(mc_io, &cmd);
  }
  
  /**
   * dpdcei_get_rx_queue() - Retrieve Rx queue 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 DPDCEI object
   * @attr:	Returned Rx queue attributes
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_rx_queue(struct fsl_mc_io *mc_io,
  			uint32_t cmd_flags,
  			uint16_t token,
  			struct dpdcei_rx_queue_attr *attr)
  {
  	struct dpdcei_rsp_get_rx_queue *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_RX_QUEUE,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_get_rx_queue *)cmd.params;
  	attr->user_ctx = le64_to_cpu(rsp_params->user_ctx);
  	attr->fqid = le32_to_cpu(rsp_params->fqid);
  	attr->dest_cfg.dest_id = le32_to_cpu(rsp_params->dest_id);
  	attr->dest_cfg.priority = rsp_params->dest_priority;
  	attr->dest_cfg.dest_type = dpdcei_get_field(rsp_params->dest_type,
  						    DEST_TYPE);
  
  	return 0;
  }
  
  /**
   * dpdcei_get_tx_queue() - Retrieve Tx queue 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 DPDCEI object
   * @attr:	Returned Tx queue attributes
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_tx_queue(struct fsl_mc_io *mc_io,
  			uint32_t cmd_flags,
  			uint16_t token,
  			struct dpdcei_tx_queue_attr *attr)
  {
  	struct dpdcei_rsp_get_tx_queue *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	/* prepare command */
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_TX_QUEUE,
  					  cmd_flags,
  					  token);
  
  	/* send command to mc*/
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	/* retrieve response parameters */
  	rsp_params = (struct dpdcei_rsp_get_tx_queue *)cmd.params;
  	attr->fqid = le32_to_cpu(rsp_params->fqid);
  
  	return 0;
  }
  
  /**
   * dpdcei_get_api_version() - Get Data Path DCE (decript/encrypt engine) API
   *				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 dce API
   * @minor_ver:	Minor version of data path dce API
   *
   * Return:	'0' on Success; Error code otherwise.
   */
  int dpdcei_get_api_version(struct fsl_mc_io *mc_io,
  			  uint32_t cmd_flags,
  			  uint16_t *major_ver,
  			  uint16_t *minor_ver)
  {
  	struct dpdcei_rsp_get_api_version *rsp_params;
  	struct mc_command cmd = { 0 };
  	int err;
  
  	cmd.header = mc_encode_cmd_header(DPDCEI_CMDID_GET_API_VERSION,
  					cmd_flags,
  					0);
  
  	err = mc_send_command(mc_io, &cmd);
  	if (err)
  		return err;
  
  	rsp_params = (struct dpdcei_rsp_get_api_version *)cmd.params;
  	*major_ver = le16_to_cpu(rsp_params->major);
  	*minor_ver = le16_to_cpu(rsp_params->minor);
  
  	return 0;
  }
  