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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Header file for DFL driver and device API
*
* Copyright (C) 2020 Intel Corporation, Inc.
*/
#ifndef __LINUX_DFL_H
#define __LINUX_DFL_H
#include <linux/device.h>
#include <linux/mod_devicetable.h>
/**
* enum dfl_id_type - define the DFL FIU types
*/
enum dfl_id_type {
FME_ID = 0,
PORT_ID = 1,
DFL_ID_MAX,
};
/**
* struct dfl_device - represent an dfl device on dfl bus
*
* @dev: generic device interface.
* @id: id of the dfl device.
* @type: type of DFL FIU of the device. See enum dfl_id_type.
* @feature_id: feature identifier local to its DFL FIU type.
* @revision: revision of this dfl device feature.
* @mmio_res: mmio resource of this dfl device.
* @irqs: list of Linux IRQ numbers of this dfl device.
* @num_irqs: number of IRQs supported by this dfl device.
* @cdev: pointer to DFL FPGA container device this dfl device belongs to.
* @id_entry: matched id entry in dfl driver's id table.
* @dfh_version: version of DFH for the device
* @param_size: size of the block parameters in bytes
* @params: pointer to block of parameters copied memory
*/
struct dfl_device {
struct device dev;
int id;
u16 type;
u16 feature_id;
u8 revision;
struct resource mmio_res;
int *irqs;
unsigned int num_irqs;
struct dfl_fpga_cdev *cdev;
const struct dfl_device_id *id_entry;
u8 dfh_version;
unsigned int param_size;
void *params;
};
/**
* struct dfl_driver - represent an dfl device driver
*
* @drv: driver model structure.
* @id_table: pointer to table of device IDs the driver is interested in.
* { } member terminated.
* @probe: mandatory callback for device binding.
* @remove: callback for device unbinding.
*/
struct dfl_driver {
struct device_driver drv;
const struct dfl_device_id *id_table;
int (*probe)(struct dfl_device *dfl_dev);
void (*remove)(struct dfl_device *dfl_dev);
};
#define to_dfl_dev(d) container_of(d, struct dfl_device, dev)
#define to_dfl_drv(d) container_of_const(d, struct dfl_driver, drv)
/*
* use a macro to avoid include chaining to get THIS_MODULE.
*/
#define dfl_driver_register(drv) \
__dfl_driver_register(drv, THIS_MODULE)
int __dfl_driver_register(struct dfl_driver *dfl_drv, struct module *owner);
void dfl_driver_unregister(struct dfl_driver *dfl_drv);
/*
* module_dfl_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_dfl_driver(__dfl_driver) \
module_driver(__dfl_driver, dfl_driver_register, \
dfl_driver_unregister)
void *dfh_find_param(struct dfl_device *dfl_dev, int param_id, size_t *pcount);
#endif /* __LINUX_DFL_H */
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