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/* SPDX-License-Identifier: GPL-2.0-only */
* Intel MIC Platform Software Stack (MPSS)
* Copyright(c) 2014 Intel Corporation.
* Intel MIC Bus driver.
* This implementation is very similar to the virtio bus driver
* implementation @ include/linux/virtio.h.
#ifndef _MIC_BUS_H_
#define _MIC_BUS_H_
* Everything a mbus driver needs to work with any particular mbus
* implementation.
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
struct mbus_device_id {
__u32 device;
__u32 vendor;
#define MBUS_DEV_DMA_MIC 3
#define MBUS_DEV_ANY_ID 0xffffffff
* mbus_device - representation of a device using mbus
* @mmio_va: virtual address of mmio space
* @hw_ops: the hardware ops supported by this device.
* @id: the device type identification (used to match it with a driver).
* @dev: underlying device.
* be used to communicate with.
* @index: unique position on the mbus bus
struct mbus_device {
void __iomem *mmio_va;
struct mbus_hw_ops *hw_ops;
struct mbus_device_id id;
struct device dev;
int index;
* mbus_driver - operations for a mbus I/O driver
* @driver: underlying device driver (populate name and owner).
* @id_table: the ids serviced by this driver.
* @probe: the function to call when a device is found. Returns 0 or -errno.
* @remove: the function to call when a device is removed.
struct mbus_driver {
struct device_driver driver;
const struct mbus_device_id *id_table;
int (*probe)(struct mbus_device *dev);
void (*scan)(struct mbus_device *dev);
void (*remove)(struct mbus_device *dev);
* struct mic_irq - opaque pointer used as cookie
struct mic_irq;
* mbus_hw_ops - Hardware operations for accessing a MIC device on the MIC bus.
struct mbus_hw_ops {
struct mic_irq* (*request_threaded_irq)(struct mbus_device *mbdev,
irq_handler_t handler,
irq_handler_t thread_fn,
const char *name, void *data,
int intr_src);
void (*free_irq)(struct mbus_device *mbdev,
struct mic_irq *cookie, void *data);
void (*ack_interrupt)(struct mbus_device *mbdev, int num);
struct mbus_device *
mbus_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
struct mbus_hw_ops *hw_ops, int index,
void __iomem *mmio_va);
void mbus_unregister_device(struct mbus_device *mbdev);
int mbus_register_driver(struct mbus_driver *drv);
void mbus_unregister_driver(struct mbus_driver *drv);
static inline struct mbus_device *dev_to_mbus(struct device *_dev)
return container_of(_dev, struct mbus_device, dev);
static inline struct mbus_driver *drv_to_mbus(struct device_driver *drv)
return container_of(drv, struct mbus_driver, driver);
#endif /* _MIC_BUS_H */