141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/*
|
|
* Intel MIC Platform Software Stack (MPSS)
|
|
*
|
|
* Copyright(c) 2016 Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* The full GNU General Public License is included in this distribution in
|
|
* the file called "COPYING".
|
|
*
|
|
* Intel Virtio over PCIe Bus driver.
|
|
*/
|
|
#ifndef _VOP_BUS_H_
|
|
#define _VOP_BUS_H_
|
|
/*
|
|
* Everything a vop driver needs to work with any particular vop
|
|
* implementation.
|
|
*/
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include "../common/mic_dev.h"
|
|
|
|
struct vop_device_id {
|
|
u32 device;
|
|
u32 vendor;
|
|
};
|
|
|
|
#define VOP_DEV_TRNSP 1
|
|
#define VOP_DEV_ANY_ID 0xffffffff
|
|
/*
|
|
* Size of the internal buffer used during DMA's as an intermediate buffer
|
|
* for copy to/from user. Must be an integral number of pages.
|
|
*/
|
|
#define VOP_INT_DMA_BUF_SIZE PAGE_ALIGN(64 * 1024ULL)
|
|
|
|
/**
|
|
* vop_device - representation of a device using vop
|
|
* @hw_ops: the hardware ops supported by this device.
|
|
* @id: the device type identification (used to match it with a driver).
|
|
* @dev: underlying device.
|
|
* @dnode - The destination node which this device will communicate with.
|
|
* @aper: Aperture memory window
|
|
* @dma_ch - DMA channel
|
|
* @index: unique position on the vop bus
|
|
*/
|
|
struct vop_device {
|
|
struct vop_hw_ops *hw_ops;
|
|
struct vop_device_id id;
|
|
struct device dev;
|
|
u8 dnode;
|
|
struct mic_mw *aper;
|
|
struct dma_chan *dma_ch;
|
|
int index;
|
|
};
|
|
|
|
/**
|
|
* vop_driver - operations for a vop 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 vop_driver {
|
|
struct device_driver driver;
|
|
const struct vop_device_id *id_table;
|
|
int (*probe)(struct vop_device *dev);
|
|
void (*remove)(struct vop_device *dev);
|
|
};
|
|
|
|
/**
|
|
* vop_hw_ops - Hardware operations for accessing a VOP device on the VOP bus.
|
|
*
|
|
* @next_db: Obtain the next available doorbell.
|
|
* @request_irq: Request an interrupt on a particular doorbell.
|
|
* @free_irq: Free an interrupt requested previously.
|
|
* @ack_interrupt: acknowledge an interrupt in the ISR.
|
|
* @get_remote_dp: Get access to the virtio device page used by the remote
|
|
* node to add/remove/configure virtio devices.
|
|
* @get_dp: Get access to the virtio device page used by the self
|
|
* node to add/remove/configure virtio devices.
|
|
* @send_intr: Send an interrupt to the peer node on a specified doorbell.
|
|
* @ioremap: Map a buffer with the specified DMA address and length.
|
|
* @iounmap: Unmap a buffer previously mapped.
|
|
* @dma_filter: The DMA filter function to use for obtaining access to
|
|
* a DMA channel on the peer node.
|
|
*/
|
|
struct vop_hw_ops {
|
|
int (*next_db)(struct vop_device *vpdev);
|
|
struct mic_irq *(*request_irq)(struct vop_device *vpdev,
|
|
irqreturn_t (*func)(int irq, void *data),
|
|
const char *name, void *data,
|
|
int intr_src);
|
|
void (*free_irq)(struct vop_device *vpdev,
|
|
struct mic_irq *cookie, void *data);
|
|
void (*ack_interrupt)(struct vop_device *vpdev, int num);
|
|
void __iomem * (*get_remote_dp)(struct vop_device *vpdev);
|
|
void * (*get_dp)(struct vop_device *vpdev);
|
|
void (*send_intr)(struct vop_device *vpdev, int db);
|
|
void __iomem * (*ioremap)(struct vop_device *vpdev,
|
|
dma_addr_t pa, size_t len);
|
|
void (*iounmap)(struct vop_device *vpdev, void __iomem *va);
|
|
};
|
|
|
|
struct vop_device *
|
|
vop_register_device(struct device *pdev, int id,
|
|
const struct dma_map_ops *dma_ops,
|
|
struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
|
|
struct dma_chan *chan);
|
|
void vop_unregister_device(struct vop_device *dev);
|
|
int vop_register_driver(struct vop_driver *drv);
|
|
void vop_unregister_driver(struct vop_driver *drv);
|
|
|
|
/*
|
|
* module_vop_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_vop_driver(__vop_driver) \
|
|
module_driver(__vop_driver, vop_register_driver, \
|
|
vop_unregister_driver)
|
|
|
|
static inline struct vop_device *dev_to_vop(struct device *dev)
|
|
{
|
|
return container_of(dev, struct vop_device, dev);
|
|
}
|
|
|
|
static inline struct vop_driver *drv_to_vop(struct device_driver *drv)
|
|
{
|
|
return container_of(drv, struct vop_driver, driver);
|
|
}
|
|
#endif /* _VOP_BUS_H */
|