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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2014 Intel Corporation.
*
* Intel Symmetric Communications Interface Bus driver.
*/
#ifndef _SCIF_BUS_H_
#define _SCIF_BUS_H_
/*
* Everything a scif driver needs to work with any particular scif
* hardware abstraction layer.
*/
#include <linux/dma-mapping.h>
#include <linux/mic_common.h>
#include "../common/mic_dev.h"
struct scif_hw_dev_id {
u32 device;
u32 vendor;
};
#define MIC_SCIF_DEV 1
#define SCIF_DEV_ANY_ID 0xffffffff
/**
* scif_hw_dev - representation of a hardware device abstracted for scif
* @hw_ops: the hardware ops supported by this device
* @id: the device type identification (used to match it with a driver)
* @mmio: MMIO memory window
* @aper: Aperture memory window
* @dev: underlying device
* @dnode - The destination node which this device will communicate with.
* @snode - The source node for this device.
* @dp - Self device page
* @rdp - Remote device page
* @dma_ch - Array of DMA channels
* @num_dma_ch - Number of DMA channels available
* @card_rel_da - Set to true if DMA addresses programmed in the DMA engine
* are relative to the card point of view
*/
struct scif_hw_dev {
struct scif_hw_ops *hw_ops;
struct scif_hw_dev_id id;
struct mic_mw *mmio;
struct mic_mw *aper;
struct device dev;
u8 dnode;
u8 snode;
void *dp;
void __iomem *rdp;
struct dma_chan **dma_ch;
int num_dma_ch;
bool card_rel_da;
};
/**
* scif_driver - operations for a scif 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 scif_driver {
struct device_driver driver;
const struct scif_hw_dev_id *id_table;
int (*probe)(struct scif_hw_dev *dev);
void (*remove)(struct scif_hw_dev *dev);
};
/**
* scif_hw_ops - Hardware operations for accessing a SCIF device on the SCIF 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.
* @send_intr: Send an interrupt to the remote node on a specified doorbell.
* @send_p2p_intr: Send an interrupt to the peer node on a specified doorbell
* which is specifically targeted for a peer to peer node.
* @remap: Map a buffer with the specified physical address and length.
* @unmap: Unmap a buffer previously mapped.
*/
struct scif_hw_ops {
int (*next_db)(struct scif_hw_dev *sdev);
struct mic_irq * (*request_irq)(struct scif_hw_dev *sdev,
irqreturn_t (*func)(int irq,
void *data),
const char *name, void *data,
int db);
void (*free_irq)(struct scif_hw_dev *sdev,
struct mic_irq *cookie, void *data);
void (*ack_interrupt)(struct scif_hw_dev *sdev, int num);
void (*send_intr)(struct scif_hw_dev *sdev, int db);
void (*send_p2p_intr)(struct scif_hw_dev *sdev, int db,
struct mic_mw *mw);
void __iomem * (*remap)(struct scif_hw_dev *sdev,
phys_addr_t pa, size_t len);
void (*unmap)(struct scif_hw_dev *sdev, void __iomem *va);
};
int scif_register_driver(struct scif_driver *driver);
void scif_unregister_driver(struct scif_driver *driver);
struct scif_hw_dev *
scif_register_device(struct device *pdev, int id,
const struct dma_map_ops *dma_ops,
struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
struct mic_mw *mmio, struct mic_mw *aper,
void *dp, void __iomem *rdp,
struct dma_chan **chan, int num_chan,
bool card_rel_da);
void scif_unregister_device(struct scif_hw_dev *sdev);
static inline struct scif_hw_dev *dev_to_scif(struct device *dev)
{
return container_of(dev, struct scif_hw_dev, dev);
}
static inline struct scif_driver *drv_to_scif(struct device_driver *drv)
{
return container_of(drv, struct scif_driver, driver);
}
#endif /* _SCIF_BUS_H */
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