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* Freescale Management Complex (MC) bus declarations
* Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
* Author: German Rivera <>
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
#ifndef _FSL_MC_MCBUS_H_
#define _FSL_MC_MCBUS_H_
#include "../include/mc.h"
#include <linux/mutex.h>
struct irq_domain;
struct msi_domain_info;
* Maximum number of total IRQs that can be pre-allocated for an MC bus'
* IRQ pool
#define dev_is_fsl_mc(_dev) ((_dev)->bus == &fsl_mc_bus_type)
/* If fsl-mc bus is not present device cannot belong to fsl-mc bus */
#define dev_is_fsl_mc(_dev) (0)
* struct fsl_mc_resource_pool - Pool of MC resources of a given
* type
* @type: type of resources in the pool
* @max_count: maximum number of resources in the pool
* @free_count: number of free resources in the pool
* @mutex: mutex to serialize access to the pool's free list
* @free_list: anchor node of list of free resources in the pool
* @mc_bus: pointer to the MC bus that owns this resource pool
struct fsl_mc_resource_pool {
enum fsl_mc_pool_type type;
int max_count;
int free_count;
struct mutex mutex; /* serializes access to free_list */
struct list_head free_list;
struct fsl_mc_bus *mc_bus;
* struct fsl_mc_bus - logical bus that corresponds to a physical DPRC
* @mc_dev: fsl-mc device for the bus device itself.
* @resource_pools: array of resource pools (one pool per resource type)
* for this MC bus. These resources represent allocatable entities
* from the physical DPRC.
* @irq_resources: Pointer to array of IRQ objects for the IRQ pool
* @scan_mutex: Serializes bus scanning
* @dprc_attr: DPRC attributes
struct fsl_mc_bus {
struct fsl_mc_device mc_dev;
struct fsl_mc_resource_pool resource_pools[FSL_MC_NUM_POOL_TYPES];
struct fsl_mc_device_irq *irq_resources;
struct mutex scan_mutex; /* serializes bus scanning */
struct dprc_attributes dprc_attr;
#define to_fsl_mc_bus(_mc_dev) \
container_of(_mc_dev, struct fsl_mc_bus, mc_dev)
int dprc_scan_container(struct fsl_mc_device *mc_bus_dev);
int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
unsigned int *total_irq_count);
int __init dprc_driver_init(void);
void dprc_driver_exit(void);
int __init fsl_mc_allocator_driver_init(void);
void fsl_mc_allocator_driver_exit(void);
struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info,
struct irq_domain *parent);
int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
struct irq_domain **mc_msi_domain);
int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
unsigned int irq_count);
void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus);
void fsl_mc_init_all_resource_pools(struct fsl_mc_device *mc_bus_dev);
void fsl_mc_cleanup_all_resource_pools(struct fsl_mc_device *mc_bus_dev);
bool fsl_mc_bus_exists(void);
void fsl_mc_get_root_dprc(struct device *dev,
struct device **root_dprc_dev);
bool fsl_mc_is_root_dprc(struct device *dev);
extern struct bus_type fsl_mc_bus_type;
#endif /* _FSL_MC_MCBUS_H_ */