| /* |
| * Freescale Management Complex (MC) bus declarations |
| * |
| * Copyright (C) 2014-2016 Freescale Semiconductor, Inc. |
| * Author: German Rivera <German.Rivera@freescale.com> |
| * |
| * 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 FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS 256 |
| |
| #ifdef CONFIG_FSL_MC_BUS |
| #define dev_is_fsl_mc(_dev) ((_dev)->bus == &fsl_mc_bus_type) |
| #else |
| /* If fsl-mc bus is not present device cannot belong to fsl-mc bus */ |
| #define dev_is_fsl_mc(_dev) (0) |
| #endif |
| |
| /** |
| * 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_ */ |