mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
2d8784df1a
When performing DMA operations on a MCB device, the device needed for using the DMA API is "mcb_device->bus_carrier". This is rather lengthy, so a shortcut is introduced to struct mcb_device in order to ensure the MCB device driver uses the correct device for DMA operations. Signed-off-by: Michael Moese <michael.moese@men.de> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
|
|
* MEN Chameleon Bus.
|
|
*
|
|
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
|
|
* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; version 2 of the License.
|
|
*/
|
|
#ifndef _LINUX_MCB_H
|
|
#define _LINUX_MCB_H
|
|
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/device.h>
|
|
#include <linux/irqreturn.h>
|
|
|
|
#define CHAMELEON_FILENAME_LEN 12
|
|
|
|
struct mcb_driver;
|
|
struct mcb_device;
|
|
|
|
/**
|
|
* struct mcb_bus - MEN Chameleon Bus
|
|
*
|
|
* @dev: bus device
|
|
* @carrier: pointer to carrier device
|
|
* @bus_nr: mcb bus number
|
|
* @get_irq: callback to get IRQ number
|
|
* @revision: the FPGA's revision number
|
|
* @model: the FPGA's model number
|
|
* @filename: the FPGA's name
|
|
*/
|
|
struct mcb_bus {
|
|
struct device dev;
|
|
struct device *carrier;
|
|
int bus_nr;
|
|
u8 revision;
|
|
char model;
|
|
u8 minor;
|
|
char name[CHAMELEON_FILENAME_LEN + 1];
|
|
int (*get_irq)(struct mcb_device *dev);
|
|
};
|
|
|
|
static inline struct mcb_bus *to_mcb_bus(struct device *dev)
|
|
{
|
|
return container_of(dev, struct mcb_bus, dev);
|
|
}
|
|
|
|
/**
|
|
* struct mcb_device - MEN Chameleon Bus device
|
|
*
|
|
* @dev: device in kernel representation
|
|
* @bus: mcb bus the device is plugged to
|
|
* @is_added: flag to check if device is added to bus
|
|
* @driver: associated mcb_driver
|
|
* @id: mcb device id
|
|
* @inst: instance in Chameleon table
|
|
* @group: group in Chameleon table
|
|
* @var: variant in Chameleon table
|
|
* @bar: BAR in Chameleon table
|
|
* @rev: revision in Chameleon table
|
|
* @irq: IRQ resource
|
|
* @memory: memory resource
|
|
*/
|
|
struct mcb_device {
|
|
struct device dev;
|
|
struct mcb_bus *bus;
|
|
bool is_added;
|
|
struct mcb_driver *driver;
|
|
u16 id;
|
|
int inst;
|
|
int group;
|
|
int var;
|
|
int bar;
|
|
int rev;
|
|
struct resource irq;
|
|
struct resource mem;
|
|
struct device *dma_dev;
|
|
};
|
|
|
|
static inline struct mcb_device *to_mcb_device(struct device *dev)
|
|
{
|
|
return container_of(dev, struct mcb_device, dev);
|
|
}
|
|
|
|
/**
|
|
* struct mcb_driver - MEN Chameleon Bus device driver
|
|
*
|
|
* @driver: device_driver
|
|
* @id_table: mcb id table
|
|
* @probe: probe callback
|
|
* @remove: remove callback
|
|
* @shutdown: shutdown callback
|
|
*/
|
|
struct mcb_driver {
|
|
struct device_driver driver;
|
|
const struct mcb_device_id *id_table;
|
|
int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
|
|
void (*remove)(struct mcb_device *mdev);
|
|
void (*shutdown)(struct mcb_device *mdev);
|
|
};
|
|
|
|
static inline struct mcb_driver *to_mcb_driver(struct device_driver *drv)
|
|
{
|
|
return container_of(drv, struct mcb_driver, driver);
|
|
}
|
|
|
|
static inline void *mcb_get_drvdata(struct mcb_device *dev)
|
|
{
|
|
return dev_get_drvdata(&dev->dev);
|
|
}
|
|
|
|
static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
|
|
{
|
|
dev_set_drvdata(&dev->dev, data);
|
|
}
|
|
|
|
extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
|
|
struct module *owner,
|
|
const char *mod_name);
|
|
#define mcb_register_driver(driver) \
|
|
__mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
|
|
extern void mcb_unregister_driver(struct mcb_driver *driver);
|
|
#define module_mcb_driver(__mcb_driver) \
|
|
module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver);
|
|
extern void mcb_bus_add_devices(const struct mcb_bus *bus);
|
|
extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
|
|
extern struct mcb_bus *mcb_alloc_bus(struct device *carrier);
|
|
extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
|
|
extern void mcb_bus_put(struct mcb_bus *bus);
|
|
extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
|
|
extern void mcb_free_dev(struct mcb_device *dev);
|
|
extern void mcb_release_bus(struct mcb_bus *bus);
|
|
extern struct resource *mcb_request_mem(struct mcb_device *dev,
|
|
const char *name);
|
|
extern void mcb_release_mem(struct resource *mem);
|
|
extern int mcb_get_irq(struct mcb_device *dev);
|
|
|
|
#endif /* _LINUX_MCB_H */
|