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