83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0
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*
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* Header file for the CDX Bus
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*
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* Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
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*/
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#ifndef _CDX_H_
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#define _CDX_H_
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#include <linux/cdx/cdx_bus.h>
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/**
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* struct cdx_dev_params - CDX device parameters
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* @cdx: CDX controller associated with the device
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* @parent: Associated CDX Bus device
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* @vendor: Vendor ID for CDX device
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* @device: Device ID for CDX device
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* @subsys_vendor: Sub vendor ID for CDX device
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* @subsys_device: Sub device ID for CDX device
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* @bus_num: Bus number for this CDX device
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* @dev_num: Device number for this device
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* @res: array of MMIO region entries
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* @res_count: number of valid MMIO regions
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* @req_id: Requestor ID associated with CDX device
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* @class: Class of the CDX Device
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* @revision: Revision of the CDX device
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*/
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struct cdx_dev_params {
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struct cdx_controller *cdx;
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struct device *parent;
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u16 vendor;
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u16 device;
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u16 subsys_vendor;
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u16 subsys_device;
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u8 bus_num;
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u8 dev_num;
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struct resource res[MAX_CDX_DEV_RESOURCES];
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u8 res_count;
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u32 req_id;
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u32 class;
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u8 revision;
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};
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/**
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* cdx_register_controller - Register a CDX controller and its ports
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* on the CDX bus.
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* @cdx: The CDX controller to register
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*
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* Return: -errno on failure, 0 on success.
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*/
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int cdx_register_controller(struct cdx_controller *cdx);
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/**
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* cdx_unregister_controller - Unregister a CDX controller
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* @cdx: The CDX controller to unregister
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*/
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void cdx_unregister_controller(struct cdx_controller *cdx);
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/**
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* cdx_device_add - Add a CDX device. This function adds a CDX device
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* on the CDX bus as per the device parameters provided
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* by caller. It also creates and registers an associated
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* Linux generic device.
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* @dev_params: device parameters associated with the device to be created.
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*
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* Return: -errno on failure, 0 on success.
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*/
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int cdx_device_add(struct cdx_dev_params *dev_params);
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/**
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* cdx_bus_add - Add a CDX bus. This function adds a bus on the CDX bus
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* subsystem. It creates a CDX device for the corresponding bus and
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* also registers an associated Linux generic device.
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* @cdx: Associated CDX controller
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* @us_num: Bus number
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*
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* Return: associated Linux generic device pointer on success or NULL on failure.
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*/
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struct device *cdx_bus_add(struct cdx_controller *cdx, u8 bus_num);
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#endif /* _CDX_H_ */
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