101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2014 Intel Corporation.
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*
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* Intel MIC Bus driver.
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*
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* This implementation is very similar to the virtio bus driver
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* implementation @ include/linux/virtio.h.
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*/
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#ifndef _MIC_BUS_H_
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#define _MIC_BUS_H_
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/*
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* Everything a mbus driver needs to work with any particular mbus
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* implementation.
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*/
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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struct mbus_device_id {
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__u32 device;
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__u32 vendor;
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};
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#define MBUS_DEV_DMA_HOST 2
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#define MBUS_DEV_DMA_MIC 3
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#define MBUS_DEV_ANY_ID 0xffffffff
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/**
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* mbus_device - representation of a device using mbus
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* @mmio_va: virtual address of mmio space
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* @hw_ops: the hardware ops supported by this device.
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* @id: the device type identification (used to match it with a driver).
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* @dev: underlying device.
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* be used to communicate with.
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* @index: unique position on the mbus bus
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*/
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struct mbus_device {
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void __iomem *mmio_va;
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struct mbus_hw_ops *hw_ops;
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struct mbus_device_id id;
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struct device dev;
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int index;
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};
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/**
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* mbus_driver - operations for a mbus I/O driver
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* @driver: underlying device driver (populate name and owner).
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* @id_table: the ids serviced by this driver.
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* @probe: the function to call when a device is found. Returns 0 or -errno.
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* @remove: the function to call when a device is removed.
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*/
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struct mbus_driver {
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struct device_driver driver;
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const struct mbus_device_id *id_table;
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int (*probe)(struct mbus_device *dev);
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void (*scan)(struct mbus_device *dev);
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void (*remove)(struct mbus_device *dev);
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};
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/**
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* struct mic_irq - opaque pointer used as cookie
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*/
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struct mic_irq;
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/**
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* mbus_hw_ops - Hardware operations for accessing a MIC device on the MIC bus.
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*/
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struct mbus_hw_ops {
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struct mic_irq* (*request_threaded_irq)(struct mbus_device *mbdev,
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irq_handler_t handler,
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irq_handler_t thread_fn,
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const char *name, void *data,
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int intr_src);
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void (*free_irq)(struct mbus_device *mbdev,
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struct mic_irq *cookie, void *data);
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void (*ack_interrupt)(struct mbus_device *mbdev, int num);
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};
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struct mbus_device *
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mbus_register_device(struct device *pdev, int id, const struct dma_map_ops *dma_ops,
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struct mbus_hw_ops *hw_ops, int index,
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void __iomem *mmio_va);
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void mbus_unregister_device(struct mbus_device *mbdev);
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int mbus_register_driver(struct mbus_driver *drv);
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void mbus_unregister_driver(struct mbus_driver *drv);
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static inline struct mbus_device *dev_to_mbus(struct device *_dev)
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{
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return container_of(_dev, struct mbus_device, dev);
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}
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static inline struct mbus_driver *drv_to_mbus(struct device_driver *drv)
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{
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return container_of(drv, struct mbus_driver, driver);
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}
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#endif /* _MIC_BUS_H */
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