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/*
* Freescale Management Complex (MC) bus public interface
*
* Copyright (C) 2014 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_H_
#define _FSL_MC_H_
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/list.h>
#include "../include/dprc.h"
#define FSL_MC_VENDOR_FREESCALE 0x1957
struct fsl_mc_device;
struct fsl_mc_io;
/**
* struct fsl_mc_driver - MC object device driver object
* @driver: Generic device driver
* @match_id_table: table of supported device matching Ids
* @probe: Function called when a device is added
* @remove: Function called when a device is removed
* @shutdown: Function called at shutdown time to quiesce the device
* @suspend: Function called when a device is stopped
* @resume: Function called when a device is resumed
*
* Generic DPAA device driver object for device drivers that are registered
* with a DPRC bus. This structure is to be embedded in each device-specific
* driver structure.
*/
struct fsl_mc_driver {
struct device_driver driver;
const struct fsl_mc_device_match_id *match_id_table;
int (*probe)(struct fsl_mc_device *dev);
int (*remove)(struct fsl_mc_device *dev);
void (*shutdown)(struct fsl_mc_device *dev);
int (*suspend)(struct fsl_mc_device *dev, pm_message_t state);
int (*resume)(struct fsl_mc_device *dev);
};
#define to_fsl_mc_driver(_drv) \
container_of(_drv, struct fsl_mc_driver, driver)
/**
* struct fsl_mc_device_match_id - MC object device Id entry for driver matching
* @vendor: vendor ID
* @obj_type: MC object type
* @ver_major: MC object version major number
* @ver_minor: MC object version minor number
*
* Type of entries in the "device Id" table for MC object devices supported by
* a MC object device driver. The last entry of the table has vendor set to 0x0
*/
struct fsl_mc_device_match_id {
u16 vendor;
const char obj_type[16];
u32 ver_major;
u32 ver_minor;
};
/**
* enum fsl_mc_pool_type - Types of allocatable MC bus resources
*
* Entries in these enum are used as indices in the array of resource
* pools of an fsl_mc_bus object.
*/
enum fsl_mc_pool_type {
FSL_MC_POOL_DPMCP = 0x0, /* corresponds to "dpmcp" in the MC */
FSL_MC_POOL_DPBP, /* corresponds to "dpbp" in the MC */
FSL_MC_POOL_DPCON, /* corresponds to "dpcon" in the MC */
/*
* NOTE: New resource pool types must be added before this entry
*/
FSL_MC_NUM_POOL_TYPES
};
/**
* struct fsl_mc_resource - MC generic resource
* @type: type of resource
* @id: unique MC resource Id within the resources of the same type
* @data: pointer to resource-specific data if the resource is currently
* allocated, or NULL if the resource is not currently allocated.
* @parent_pool: pointer to the parent resource pool from which this
* resource is allocated from.
* @node: Node in the free list of the corresponding resource pool
*
* NOTE: This structure is to be embedded as a field of specific
* MC resource structures.
*/
struct fsl_mc_resource {
enum fsl_mc_pool_type type;
int32_t id;
void *data;
struct fsl_mc_resource_pool *parent_pool;
struct list_head node;
};
/**
* Bit masks for a MC object device (struct fsl_mc_device) flags
*/
#define FSL_MC_IS_DPRC 0x0001
/**
* Default DMA mask for devices on a fsl-mc bus
*/
#define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
/**
* struct fsl_mc_device - MC object device object
* @dev: Linux driver model device object
* @dma_mask: Default DMA mask
* @flags: MC object device flags
* @icid: Isolation context ID for the device
* @mc_handle: MC handle for the corresponding MC object opened
* @mc_io: Pointer to MC IO object assigned to this device or
* NULL if none.
* @obj_desc: MC description of the DPAA device
* @regions: pointer to array of MMIO region entries
* @resource: generic resource associated with this MC object device, if any.
*
* Generic device object for MC object devices that are "attached" to a
* MC bus.
*
* NOTES:
* - For a non-DPRC object its icid is the same as its parent DPRC's icid.
* - The SMMU notifier callback gets invoked after device_add() has been
* called for an MC object device, but before the device-specific probe
* callback gets called.
* - DP_OBJ_DPRC objects are the only MC objects that have built-in MC
* portals. For all other MC objects, their device drivers are responsible for
* allocating MC portals for them by calling fsl_mc_portal_allocate().
* - Some types of MC objects (e.g., DP_OBJ_DPBP, DP_OBJ_DPCON) are
* treated as resources that can be allocated/deallocated from the
* corresponding resource pool in the object's parent DPRC, using the
* fsl_mc_object_allocate()/fsl_mc_object_free() functions. These MC objects
* are known as "allocatable" objects. For them, the corresponding
* fsl_mc_device's 'resource' points to the associated resource object.
* For MC objects that are not allocatable (e.g., DP_OBJ_DPRC, DP_OBJ_DPNI),
* 'resource' is NULL.
*/
struct fsl_mc_device {
struct device dev;
u64 dma_mask;
u16 flags;
u16 icid;
u16 mc_handle;
struct fsl_mc_io *mc_io;
struct dprc_obj_desc obj_desc;
struct resource *regions;
struct fsl_mc_resource *resource;
};
#define to_fsl_mc_device(_dev) \
container_of(_dev, struct fsl_mc_device, dev)
/*
* module_fsl_mc_driver() - Helper macro for drivers that don't do
* anything special in module init/exit. This eliminates a lot of
* boilerplate. Each module may only use this macro once, and
* calling it replaces module_init() and module_exit()
*/
#define module_fsl_mc_driver(__fsl_mc_driver) \
module_driver(__fsl_mc_driver, fsl_mc_driver_register, \
fsl_mc_driver_unregister)
/*
* Macro to avoid include chaining to get THIS_MODULE
*/
#define fsl_mc_driver_register(drv) \
__fsl_mc_driver_register(drv, THIS_MODULE)
int __must_check __fsl_mc_driver_register(struct fsl_mc_driver *fsl_mc_driver,
struct module *owner);
void fsl_mc_driver_unregister(struct fsl_mc_driver *driver);
bool fsl_mc_bus_exists(void);
int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
u16 mc_io_flags,
struct fsl_mc_io **new_mc_io);
void fsl_mc_portal_free(struct fsl_mc_io *mc_io);
int fsl_mc_portal_reset(struct fsl_mc_io *mc_io);
int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
enum fsl_mc_pool_type pool_type,
struct fsl_mc_device **new_mc_adev);
void fsl_mc_object_free(struct fsl_mc_device *mc_adev);
extern struct bus_type fsl_mc_bus_type;
#endif /* _FSL_MC_H_ */
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