134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Intel Symmetric Communications Interface Bus driver.
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*/
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#ifndef _SCIF_BUS_H_
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#define _SCIF_BUS_H_
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/*
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* Everything a scif driver needs to work with any particular scif
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* hardware abstraction layer.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/mic_common.h>
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#include "../common/mic_dev.h"
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struct scif_hw_dev_id {
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u32 device;
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u32 vendor;
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};
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#define MIC_SCIF_DEV 1
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#define SCIF_DEV_ANY_ID 0xffffffff
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/**
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* scif_hw_dev - representation of a hardware device abstracted for scif
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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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* @mmio: MMIO memory window
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* @aper: Aperture memory window
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* @dev: underlying device
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* @dnode - The destination node which this device will communicate with.
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* @snode - The source node for this device.
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* @dp - Self device page
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* @rdp - Remote device page
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* @dma_ch - Array of DMA channels
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* @num_dma_ch - Number of DMA channels available
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* @card_rel_da - Set to true if DMA addresses programmed in the DMA engine
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* are relative to the card point of view
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*/
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struct scif_hw_dev {
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struct scif_hw_ops *hw_ops;
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struct scif_hw_dev_id id;
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struct mic_mw *mmio;
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struct mic_mw *aper;
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struct device dev;
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u8 dnode;
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u8 snode;
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void *dp;
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void __iomem *rdp;
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struct dma_chan **dma_ch;
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int num_dma_ch;
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bool card_rel_da;
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};
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/**
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* scif_driver - operations for a scif 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 scif_driver {
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struct device_driver driver;
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const struct scif_hw_dev_id *id_table;
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int (*probe)(struct scif_hw_dev *dev);
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void (*remove)(struct scif_hw_dev *dev);
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};
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/**
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* scif_hw_ops - Hardware operations for accessing a SCIF device on the SCIF bus.
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*
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* @next_db: Obtain the next available doorbell.
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* @request_irq: Request an interrupt on a particular doorbell.
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* @free_irq: Free an interrupt requested previously.
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* @ack_interrupt: acknowledge an interrupt in the ISR.
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* @send_intr: Send an interrupt to the remote node on a specified doorbell.
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* @send_p2p_intr: Send an interrupt to the peer node on a specified doorbell
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* which is specifically targeted for a peer to peer node.
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* @ioremap: Map a buffer with the specified physical address and length.
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* @iounmap: Unmap a buffer previously mapped.
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*/
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struct scif_hw_ops {
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int (*next_db)(struct scif_hw_dev *sdev);
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struct mic_irq * (*request_irq)(struct scif_hw_dev *sdev,
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irqreturn_t (*func)(int irq,
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void *data),
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const char *name, void *data,
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int db);
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void (*free_irq)(struct scif_hw_dev *sdev,
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struct mic_irq *cookie, void *data);
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void (*ack_interrupt)(struct scif_hw_dev *sdev, int num);
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void (*send_intr)(struct scif_hw_dev *sdev, int db);
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void (*send_p2p_intr)(struct scif_hw_dev *sdev, int db,
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struct mic_mw *mw);
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void __iomem * (*ioremap)(struct scif_hw_dev *sdev,
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phys_addr_t pa, size_t len);
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void (*iounmap)(struct scif_hw_dev *sdev, void __iomem *va);
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};
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int scif_register_driver(struct scif_driver *driver);
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void scif_unregister_driver(struct scif_driver *driver);
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struct scif_hw_dev *
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scif_register_device(struct device *pdev, int id,
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const struct dma_map_ops *dma_ops,
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struct scif_hw_ops *hw_ops, u8 dnode, u8 snode,
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struct mic_mw *mmio, struct mic_mw *aper,
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void *dp, void __iomem *rdp,
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struct dma_chan **chan, int num_chan,
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bool card_rel_da);
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void scif_unregister_device(struct scif_hw_dev *sdev);
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static inline struct scif_hw_dev *dev_to_scif(struct device *dev)
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{
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return container_of(dev, struct scif_hw_dev, dev);
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}
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static inline struct scif_driver *drv_to_scif(struct device_driver *drv)
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{
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return container_of(drv, struct scif_driver, driver);
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}
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#endif /* _SCIF_BUS_H */
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