drivers/staging/fsl-mc/bus/dprc.c

/* 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 "../include/mc-sys.h"
#include "../include/mc-cmd.h"
#include "../include/dprc.h"

#include "dprc-cmd.h"

/**
 * dprc_open() - Open DPRC object for use
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @container_id: Container ID to open
 * @token:	Returned token of DPRC object
 *
 * Return:	'0' on Success; Error code otherwise.
 *
 * @warning	Required before any operation on the object.
 */
int dprc_open(struct fsl_mc_io *mc_io,
	      u32 cmd_flags,
	      int container_id,
	      u16 *token)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_open *cmd_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_OPEN, cmd_flags,
					  0);
	cmd_params = (struct dprc_cmd_open *)cmd.params;
	cmd_params->container_id = cpu_to_le32(container_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;
}
EXPORT_SYMBOL(dprc_open);

/**
 * dprc_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 DPRC 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 dprc_close(struct fsl_mc_io *mc_io,
	       u32 cmd_flags,
	       u16 token)
{
	struct mc_command cmd = { 0 };

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

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

/**
 * dprc_create_container() - Create child container
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @cfg:	Child container configuration
 * @child_container_id:	Returned child container ID
 * @child_portal_offset: Returned child portal offset from MC portal base
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_create_container(struct fsl_mc_io *mc_io,
			  u32 cmd_flags,
			  u16 token,
			  struct dprc_cfg *cfg,
			  int *child_container_id,
			  u64 *child_portal_offset)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_create_container *cmd_params;
	struct dprc_rsp_create_container *rsp_params;
	int err;

	/* prepare command */
	cmd_params = (struct dprc_cmd_create_container *)cmd.params;
	cmd_params->options = cpu_to_le32(cfg->options);
	cmd_params->icid = cpu_to_le16(cfg->icid);
	cmd_params->portal_id = cpu_to_le32(cfg->portal_id);
	strncpy(cmd_params->label, cfg->label, 16);
	cmd_params->label[15] = '\0';

	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CREATE_CONT,
					  cmd_flags, token);

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_create_container *)cmd.params;
	*child_container_id = le32_to_cpu(rsp_params->child_container_id);
	*child_portal_offset = le64_to_cpu(rsp_params->child_portal_addr);

	return 0;
}

/**
 * dprc_destroy_container() - Destroy child container.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @child_container_id:	ID of the container to destroy
 *
 * This function terminates the child container, so following this call the
 * child container ID becomes invalid.
 *
 * Notes:
 * - All resources and objects of the destroyed container are returned to the
 * parent container or destroyed if were created be the destroyed container.
 * - This function destroy all the child containers of the specified
 *   container prior to destroying the container itself.
 *
 * warning: Only the parent container is allowed to destroy a child policy
 *		Container 0 can't be destroyed
 *
 * Return:	'0' on Success; Error code otherwise.
 *
 */
int dprc_destroy_container(struct fsl_mc_io *mc_io,
			   u32 cmd_flags,
			   u16 token,
			   int child_container_id)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_destroy_container *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_DESTROY_CONT,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_destroy_container *)cmd.params;
	cmd_params->child_container_id = cpu_to_le32(child_container_id);

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

/**
 * dprc_reset_container - Reset child container.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @child_container_id:	ID of the container to reset
 *
 * In case a software context crashes or becomes non-responsive, the parent
 * may wish to reset its resources container before the software context is
 * restarted.
 *
 * This routine informs all objects assigned to the child container that the
 * container is being reset, so they may perform any cleanup operations that are
 * needed. All objects handles that were owned by the child container shall be
 * closed.
 *
 * Note that such request may be submitted even if the child software context
 * has not crashed, but the resulting object cleanup operations will not be
 * aware of that.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_reset_container(struct fsl_mc_io *mc_io,
			 u32 cmd_flags,
			 u16 token,
			 int child_container_id)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_reset_container *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_RESET_CONT,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_reset_container *)cmd.params;
	cmd_params->child_container_id = cpu_to_le32(child_container_id);

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

/**
 * dprc_get_irq() - Get IRQ information from the DPRC.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	The interrupt index to configure
 * @type:	Interrupt type: 0 represents message interrupt
 *		type (both irq_addr and irq_val are valid)
 * @irq_cfg:	IRQ attributes
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_irq(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 u8 irq_index,
		 int *type,
		 struct dprc_irq_cfg *irq_cfg)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_irq *cmd_params;
	struct dprc_rsp_get_irq *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_irq *)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 dprc_rsp_get_irq *)cmd.params;
	irq_cfg->val = le32_to_cpu(rsp_params->irq_val);
	irq_cfg->paddr = le64_to_cpu(rsp_params->irq_addr);
	irq_cfg->irq_num = le32_to_cpu(rsp_params->irq_num);
	*type = le32_to_cpu(rsp_params->type);

	return 0;
}

/**
 * dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @irq_index:	Identifies the interrupt index to configure
 * @irq_cfg:	IRQ configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_irq(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 u8 irq_index,
		 struct dprc_irq_cfg *irq_cfg)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_irq *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_set_irq *)cmd.params;
	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
	cmd_params->irq_index = irq_index;
	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);

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

/**
 * dprc_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 DPRC object
 * @irq_index:  The interrupt index to configure
 * @en:		Returned interrupt state - enable = 1, disable = 0
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_irq_enable(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			u8 irq_index,
			u8 *en)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_irq_enable *cmd_params;
	struct dprc_rsp_get_irq_enable *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_ENABLE,
					  cmd_flags, token);
	cmd_params = (struct dprc_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 dprc_rsp_get_irq_enable *)cmd.params;
	*en = rsp_params->enabled & DPRC_ENABLE;

	return 0;
}

/**
 * dprc_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 DPRC 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 dprc_set_irq_enable(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			u8 irq_index,
			u8 en)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_irq_enable *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_ENABLE,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_set_irq_enable *)cmd.params;
	cmd_params->enable = en & DPRC_ENABLE;
	cmd_params->irq_index = irq_index;

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

/**
 * dprc_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 DPRC 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 dprc_get_irq_mask(struct fsl_mc_io *mc_io,
		      u32 cmd_flags,
		      u16 token,
		      u8 irq_index,
		      u32 *mask)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_irq_mask *cmd_params;
	struct dprc_rsp_get_irq_mask *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_MASK,
					  cmd_flags, token);
	cmd_params = (struct dprc_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 dprc_rsp_get_irq_mask *)cmd.params;
	*mask = le32_to_cpu(rsp_params->mask);

	return 0;
}

/**
 * dprc_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 DPRC 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 dprc_set_irq_mask(struct fsl_mc_io *mc_io,
		      u32 cmd_flags,
		      u16 token,
		      u8 irq_index,
		      u32 mask)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_irq_mask *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_MASK,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_set_irq_mask *)cmd.params;
	cmd_params->mask = cpu_to_le32(mask);
	cmd_params->irq_index = irq_index;

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

/**
 * dprc_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 DPRC 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 dprc_get_irq_status(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			u8 irq_index,
			u32 *status)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_irq_status *cmd_params;
	struct dprc_rsp_get_irq_status *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_STATUS,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_irq_status *)cmd.params;
	cmd_params->status = cpu_to_le32(*status);
	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 dprc_rsp_get_irq_status *)cmd.params;
	*status = le32_to_cpu(rsp_params->status);

	return 0;
}

/**
 * dprc_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 DPRC 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 dprc_clear_irq_status(struct fsl_mc_io *mc_io,
			  u32 cmd_flags,
			  u16 token,
			  u8 irq_index,
			  u32 status)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_clear_irq_status *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLEAR_IRQ_STATUS,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_clear_irq_status *)cmd.params;
	cmd_params->status = cpu_to_le32(status);
	cmd_params->irq_index = irq_index;

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

/**
 * dprc_get_attributes() - Obtains container 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 DPRC object
 * @attributes	Returned container attributes
 *
 * Return:     '0' on Success; Error code otherwise.
 */
int dprc_get_attributes(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			struct dprc_attributes *attr)
{
	struct mc_command cmd = { 0 };
	struct dprc_rsp_get_attributes *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_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 dprc_rsp_get_attributes *)cmd.params;
	attr->container_id = le32_to_cpu(rsp_params->container_id);
	attr->icid = le16_to_cpu(rsp_params->icid);
	attr->options = le32_to_cpu(rsp_params->options);
	attr->portal_id = le32_to_cpu(rsp_params->portal_id);
	attr->version.major = le16_to_cpu(rsp_params->version_major);
	attr->version.minor = le16_to_cpu(rsp_params->version_minor);

	return 0;
}

/**
 * dprc_set_res_quota() - Set allocation policy for a specific resource/object
 *		type in a child container
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @child_container_id:	ID of the child container
 * @type:	Resource/object type
 * @quota:	Sets the maximum number of resources of	the selected type
 *		that the child container is allowed to allocate from its parent;
 *		when quota is set to -1, the policy is the same as container's
 *		general policy.
 *
 * Allocation policy determines whether or not a container may allocate
 * resources from its parent. Each container has a 'global' allocation policy
 * that is set when the container is created.
 *
 * This function sets allocation policy for a specific resource type.
 * The default policy for all resource types matches the container's 'global'
 * allocation policy.
 *
 * Return:	'0' on Success; Error code otherwise.
 *
 * @warning	Only the parent container is allowed to change a child policy.
 */
int dprc_set_res_quota(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16 token,
		       int child_container_id,
		       char *type,
		       u16 quota)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_res_quota *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_RES_QUOTA,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_set_res_quota *)cmd.params;
	cmd_params->child_container_id = cpu_to_le32(child_container_id);
	cmd_params->quota = cpu_to_le16(quota);
	strncpy(cmd_params->type, type, 16);
	cmd_params->type[15] = '\0';

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

/**
 * dprc_get_res_quota() - Gets the allocation policy of a specific
 *		resource/object type in a child container
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @child_container_id;	ID of the child container
 * @type:	resource/object type
 * @quota:	Returnes the maximum number of resources of the selected type
 *		that the child container is allowed to allocate from the parent;
 *		when quota is set to -1, the policy is the same as container's
 *		general policy.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_res_quota(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16 token,
		       int child_container_id,
		       char *type,
		       u16 *quota)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_res_quota *cmd_params;
	struct dprc_rsp_get_res_quota *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_RES_QUOTA,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_res_quota *)cmd.params;
	cmd_params->child_container_id = cpu_to_le32(child_container_id);
	strncpy(cmd_params->type, type, 16);
	cmd_params->type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_res_quota *)cmd.params;
	*quota = le16_to_cpu(rsp_params->quota);

	return 0;
}

/**
 * dprc_assign() - Assigns objects or resource to a child container.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @container_id: ID of the child container
 * @res_req:	Describes the type and amount of resources to
 *			assign to the given container
 *
 * Assignment is usually done by a parent (this DPRC) to one of its child
 * containers.
 *
 * According to the DPRC allocation policy, the assigned resources may be taken
 * (allocated) from the container's ancestors, if not enough resources are
 * available in the container itself.
 *
 * The type of assignment depends on the dprc_res_req options, as follows:
 * - DPRC_RES_REQ_OPT_EXPLICIT: indicates that assigned resources should have
 *   the explicit base ID specified at the id_base_align field of res_req.
 * - DPRC_RES_REQ_OPT_ALIGNED: indicates that the assigned resources should be
 *   aligned to the value given at id_base_align field of res_req.
 * - DPRC_RES_REQ_OPT_PLUGGED: Relevant only for object assignment,
 *   and indicates that the object must be set to the plugged state.
 *
 * A container may use this function with its own ID in order to change a
 * object state to plugged or unplugged.
 *
 * If IRQ information has been set in the child DPRC, it will signal an
 * interrupt following every change in its object assignment.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_assign(struct fsl_mc_io *mc_io,
		u32 cmd_flags,
		u16 token,
		int container_id,
		struct dprc_res_req *res_req)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_assign *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_ASSIGN,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_assign *)cmd.params;
	cmd_params->container_id = cpu_to_le32(container_id);
	cmd_params->options = cpu_to_le32(res_req->options);
	cmd_params->num = cpu_to_le32(res_req->num);
	cmd_params->id_base_align = cpu_to_le32(res_req->id_base_align);
	strncpy(cmd_params->type, res_req->type, 16);
	cmd_params->type[15] = '\0';

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

/**
 * dprc_unassign() - Un-assigns objects or resources from a child container
 *		and moves them into this (parent) DPRC.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @child_container_id:	ID of the child container
 * @res_req:	Describes the type and amount of resources to un-assign from
 *		the child container
 *
 * Un-assignment of objects can succeed only if the object is not in the
 * plugged or opened state.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_unassign(struct fsl_mc_io *mc_io,
		  u32 cmd_flags,
		  u16 token,
		  int child_container_id,
		  struct dprc_res_req *res_req)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_unassign *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_UNASSIGN,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_unassign *)cmd.params;
	cmd_params->child_container_id = cpu_to_le32(child_container_id);
	cmd_params->options = cpu_to_le32(res_req->options);
	cmd_params->num = cpu_to_le32(res_req->num);
	cmd_params->id_base_align = cpu_to_le32(res_req->id_base_align);
	strncpy(cmd_params->type, res_req->type, 16);
	cmd_params->type[15] = '\0';

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

/**
 * dprc_get_pool_count() - Get the number of dprc's pools
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @mc_io:	Pointer to MC portal's I/O object
 * @token:	Token of DPRC object
 * @pool_count:	Returned number of resource pools in the dprc
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_pool_count(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			int *pool_count)
{
	struct mc_command cmd = { 0 };
	struct dprc_rsp_get_pool_count *rsp_params;
	int err;

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

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_pool_count *)cmd.params;
	*pool_count = le32_to_cpu(rsp_params->pool_count);

	return 0;
}

/**
 * dprc_get_pool() - Get the type (string) of a certain dprc's pool
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @pool_index;	Index of the pool to be queried (< pool_count)
 * @type:	The type of the pool
 *
 * The pool types retrieved one by one by incrementing
 * pool_index up to (not including) the value of pool_count returned
 * from dprc_get_pool_count(). dprc_get_pool_count() must
 * be called prior to dprc_get_pool().
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_pool(struct fsl_mc_io *mc_io,
		  u32 cmd_flags,
		  u16 token,
		  int pool_index,
		  char *type)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_pool *cmd_params;
	struct dprc_rsp_get_pool *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_POOL,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_pool *)cmd.params;
	cmd_params->pool_index = cpu_to_le32(pool_index);

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_pool *)cmd.params;
	strncpy(type, rsp_params->type, 16);
	type[15] = '\0';

	return 0;
}

/**
 * dprc_get_obj_count() - Obtains the number of objects in the DPRC
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_count:	Number of objects assigned to the DPRC
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj_count(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16 token,
		       int *obj_count)
{
	struct mc_command cmd = { 0 };
	struct dprc_rsp_get_obj_count *rsp_params;
	int err;

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

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_count *)cmd.params;
	*obj_count = le32_to_cpu(rsp_params->obj_count);

	return 0;
}
EXPORT_SYMBOL(dprc_get_obj_count);

/**
 * dprc_get_obj() - Get general information on an 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 DPRC object
 * @obj_index:	Index of the object to be queried (< obj_count)
 * @obj_desc:	Returns the requested object descriptor
 *
 * The object descriptors are retrieved one by one by incrementing
 * obj_index up to (not including) the value of obj_count returned
 * from dprc_get_obj_count(). dprc_get_obj_count() must
 * be called prior to dprc_get_obj().
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 int obj_index,
		 struct dprc_obj_desc *obj_desc)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_obj *cmd_params;
	struct dprc_rsp_get_obj *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_obj *)cmd.params;
	cmd_params->obj_index = cpu_to_le32(obj_index);

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj *)cmd.params;
	obj_desc->id = le32_to_cpu(rsp_params->id);
	obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
	obj_desc->irq_count = rsp_params->irq_count;
	obj_desc->region_count = rsp_params->region_count;
	obj_desc->state = le32_to_cpu(rsp_params->state);
	obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
	obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
	obj_desc->flags = le16_to_cpu(rsp_params->flags);
	strncpy(obj_desc->type, rsp_params->type, 16);
	obj_desc->type[15] = '\0';
	strncpy(obj_desc->label, rsp_params->label, 16);
	obj_desc->label[15] = '\0';
	return 0;
}
EXPORT_SYMBOL(dprc_get_obj);

/**
 * dprc_get_obj_desc() - Get object descriptor.
 *
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_type:	The type of the object to get its descriptor.
 * @obj_id:	The id of the object to get its descriptor
 * @obj_desc:	The returned descriptor to fill and return to the user
 *
 * Return:	'0' on Success; Error code otherwise.
 *
 */
int dprc_get_obj_desc(struct fsl_mc_io *mc_io,
		      u32 cmd_flags,
		      u16 token,
		      char *obj_type,
		      int obj_id,
		      struct dprc_obj_desc *obj_desc)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_obj_desc *cmd_params;
	struct dprc_rsp_get_obj_desc *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_DESC,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_obj_desc *)cmd.params;
	cmd_params->obj_id = cpu_to_le32(obj_id);
	strncpy(cmd_params->type, obj_type, 16);
	cmd_params->type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_desc *)cmd.params;
	obj_desc->id = le32_to_cpu(rsp_params->id);
	obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
	obj_desc->irq_count = rsp_params->irq_count;
	obj_desc->region_count = rsp_params->region_count;
	obj_desc->state = le32_to_cpu(rsp_params->state);
	obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
	obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
	obj_desc->flags = le16_to_cpu(rsp_params->flags);
	strncpy(obj_desc->type, rsp_params->type, 16);
	obj_desc->type[15] = '\0';
	strncpy(obj_desc->label, rsp_params->label, 16);
	obj_desc->label[15] = '\0';

	return 0;
}
EXPORT_SYMBOL(dprc_get_obj_desc);

/**
 * dprc_set_obj_irq() - Set IRQ information for object to trigger an interrupt.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_type:	Type of the object to set its IRQ
 * @obj_id:	ID of the object to set its IRQ
 * @irq_index:	The interrupt index to configure
 * @irq_cfg:	IRQ configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_obj_irq(struct fsl_mc_io *mc_io,
		     u32 cmd_flags,
		     u16 token,
		     char *obj_type,
		     int obj_id,
		     u8 irq_index,
		     struct dprc_irq_cfg *irq_cfg)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_obj_irq *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_set_obj_irq *)cmd.params;
	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
	cmd_params->irq_index = irq_index;
	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
	cmd_params->obj_id = cpu_to_le32(obj_id);
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

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

/**
 * dprc_get_obj_irq() - Get IRQ information from 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 DPRC object
 * @obj_type:	Type od the object to get its IRQ
 * @obj_id:	ID of the object to get its IRQ
 * @irq_index:	The interrupt index to configure
 * @type:	Interrupt type: 0 represents message interrupt
 *		type (both irq_addr and irq_val are valid)
 * @irq_cfg:	The returned IRQ attributes
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj_irq(struct fsl_mc_io *mc_io,
		     u32 cmd_flags,
		     u16 token,
		     char *obj_type,
		     int obj_id,
		     u8 irq_index,
		     int *type,
		     struct dprc_irq_cfg *irq_cfg)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_obj_irq *cmd_params;
	struct dprc_rsp_get_obj_irq *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_IRQ,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_obj_irq *)cmd.params;
	cmd_params->obj_id = cpu_to_le32(obj_id);
	cmd_params->irq_index = irq_index;
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_irq *)cmd.params;
	irq_cfg->val = le32_to_cpu(rsp_params->irq_val);
	irq_cfg->paddr = le64_to_cpu(rsp_params->irq_addr);
	irq_cfg->irq_num = le32_to_cpu(rsp_params->irq_num);
	*type = le32_to_cpu(rsp_params->type);

	return 0;
}
EXPORT_SYMBOL(dprc_get_obj_irq);

/**
 * dprc_get_res_count() - Obtains the number of free resources that are assigned
 *		to this container, by pool type
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @type:	pool type
 * @res_count:	Returned number of free resources of the given
 *			resource type that are assigned to this DPRC
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_res_count(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16 token,
		       char *type,
		       int *res_count)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_res_count *cmd_params;
	struct dprc_rsp_get_res_count *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_RES_COUNT,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_res_count *)cmd.params;
	strncpy(cmd_params->type, type, 16);
	cmd_params->type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_res_count *)cmd.params;
	*res_count = le32_to_cpu(rsp_params->res_count);

	return 0;
}
EXPORT_SYMBOL(dprc_get_res_count);

/**
 * dprc_get_res_ids() - Obtains IDs of free resources in the container
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @type:	pool type
 * @range_desc:	range descriptor
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_res_ids(struct fsl_mc_io *mc_io,
		     u32 cmd_flags,
		     u16 token,
		     char *type,
		     struct dprc_res_ids_range_desc *range_desc)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_res_ids *cmd_params;
	struct dprc_rsp_get_res_ids *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_RES_IDS,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_res_ids *)cmd.params;
	cmd_params->iter_status = range_desc->iter_status;
	cmd_params->base_id = cpu_to_le32(range_desc->base_id);
	cmd_params->last_id = cpu_to_le32(range_desc->last_id);
	strncpy(cmd_params->type, type, 16);
	cmd_params->type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_res_ids *)cmd.params;
	range_desc->iter_status = rsp_params->iter_status;
	range_desc->base_id = le32_to_cpu(rsp_params->base_id);
	range_desc->last_id = le32_to_cpu(rsp_params->last_id);

	return 0;
}
EXPORT_SYMBOL(dprc_get_res_ids);

/**
 * dprc_get_obj_region() - Get region information for a 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 DPRC object
 * @obj_type;	Object type as returned in dprc_get_obj()
 * @obj_id:	Unique object instance as returned in dprc_get_obj()
 * @region_index: The specific region to query
 * @region_desc:  Returns the requested region descriptor
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_get_obj_region(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			char *obj_type,
			int obj_id,
			u8 region_index,
			struct dprc_region_desc *region_desc)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_obj_region *cmd_params;
	struct dprc_rsp_get_obj_region *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
					  cmd_flags, token);
	cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params;
	cmd_params->obj_id = cpu_to_le32(obj_id);
	cmd_params->region_index = region_index;
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_obj_region *)cmd.params;
	region_desc->base_offset = le64_to_cpu(rsp_params->base_addr);
	region_desc->size = le32_to_cpu(rsp_params->size);

	return 0;
}
EXPORT_SYMBOL(dprc_get_obj_region);

/**
 * dprc_set_obj_label() - Set object label.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @obj_type:	Object's type
 * @obj_id:	Object's ID
 * @label:	The required label. The maximum length is 16 chars.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_set_obj_label(struct fsl_mc_io *mc_io,
		       u32 cmd_flags,
		       u16  token,
		       char *obj_type,
		       int  obj_id,
		       char *label)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_set_obj_label *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_LABEL,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_set_obj_label *)cmd.params;
	cmd_params->obj_id = cpu_to_le32(obj_id);
	strncpy(cmd_params->label, label, 16);
	cmd_params->label[15] = '\0';
	strncpy(cmd_params->obj_type, obj_type, 16);
	cmd_params->obj_type[15] = '\0';

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

/**
 * dprc_connect() - Connect two endpoints to create a network link between them
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @endpoint1:	Endpoint 1 configuration parameters
 * @endpoint2:	Endpoint 2 configuration parameters
 * @cfg: Connection configuration. The connection configuration is ignored for
 *	 connections made to DPMAC objects, where rate is retrieved from the
 *	 MAC configuration.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_connect(struct fsl_mc_io *mc_io,
		 u32 cmd_flags,
		 u16 token,
		 const struct dprc_endpoint *endpoint1,
		 const struct dprc_endpoint *endpoint2,
		 const struct dprc_connection_cfg *cfg)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_connect *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CONNECT,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_connect *)cmd.params;
	cmd_params->ep1_id = cpu_to_le32(endpoint1->id);
	cmd_params->ep1_interface_id = cpu_to_le32(endpoint1->if_id);
	cmd_params->ep2_id = cpu_to_le32(endpoint2->id);
	cmd_params->ep2_interface_id = cpu_to_le32(endpoint2->if_id);
	strncpy(cmd_params->ep1_type, endpoint1->type, 16);
	cmd_params->ep1_type[15] = '\0';
	cmd_params->max_rate = cpu_to_le32(cfg->max_rate);
	cmd_params->committed_rate = cpu_to_le32(cfg->committed_rate);
	strncpy(cmd_params->ep2_type, endpoint2->type, 16);
	cmd_params->ep2_type[15] = '\0';

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

/**
 * dprc_disconnect() - Disconnect one endpoint to remove its network connection
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @endpoint:	Endpoint configuration parameters
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dprc_disconnect(struct fsl_mc_io *mc_io,
		    u32 cmd_flags,
		    u16 token,
		    const struct dprc_endpoint *endpoint)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_disconnect *cmd_params;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_DISCONNECT,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_disconnect *)cmd.params;
	cmd_params->id = cpu_to_le32(endpoint->id);
	cmd_params->interface_id = cpu_to_le32(endpoint->if_id);
	strncpy(cmd_params->type, endpoint->type, 16);
	cmd_params->type[15] = '\0';

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

/**
 * dprc_get_connection() - Get connected endpoint and link status if connection
 *			exists.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPRC object
 * @endpoint1:	Endpoint 1 configuration parameters
 * @endpoint2:	Returned endpoint 2 configuration parameters
 * @state:	Returned link state:
 *		1 - link is up;
 *		0 - link is down;
 *		-1 - no connection (endpoint2 information is irrelevant)
 *
 * Return:     '0' on Success; -ENAVAIL if connection does not exist.
 */
int dprc_get_connection(struct fsl_mc_io *mc_io,
			u32 cmd_flags,
			u16 token,
			const struct dprc_endpoint *endpoint1,
			struct dprc_endpoint *endpoint2,
			int *state)
{
	struct mc_command cmd = { 0 };
	struct dprc_cmd_get_connection *cmd_params;
	struct dprc_rsp_get_connection *rsp_params;
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONNECTION,
					  cmd_flags,
					  token);
	cmd_params = (struct dprc_cmd_get_connection *)cmd.params;
	cmd_params->ep1_id = cpu_to_le32(endpoint1->id);
	cmd_params->ep1_interface_id = cpu_to_le32(endpoint1->if_id);
	strncpy(cmd_params->ep1_type, endpoint1->type, 16);
	cmd_params->ep1_type[15] = '\0';

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

	/* retrieve response parameters */
	rsp_params = (struct dprc_rsp_get_connection *)cmd.params;
	endpoint2->id = le32_to_cpu(rsp_params->ep2_id);
	endpoint2->if_id = le32_to_cpu(rsp_params->ep2_interface_id);
	strncpy(endpoint2->type, rsp_params->ep2_type, 16);
	endpoint2->type[15] = '\0';
	*state = le32_to_cpu(rsp_params->state);

	return 0;
}