projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2959ab24 NG |
1 | /* SPDX-License-Identifier: GPL-2.0 |
| 2 | * | |
| 3 | * Header file for the CDX Bus | |
| 4 | * | |
| 5 | * Copyright (C) 2022-2023, Advanced Micro Devices, Inc. | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _CDX_H_ | |
| 9 | #define _CDX_H_ | |
| 10 | ||
| 11 | #include <linux/cdx/cdx_bus.h> | |
| 12 | ||
| 13 | /** | |
| 14 | * struct cdx_dev_params - CDX device parameters | |
| 15 | * @cdx: CDX controller associated with the device | |
| ce558a39 | 16 | * @parent: Associated CDX Bus device |
| 2959ab24 NG |
17 | * @vendor: Vendor ID for CDX device |
| 18 | * @device: Device ID for CDX device | |
| fa10f413 AG |
19 | * @subsys_vendor: Sub vendor ID for CDX device |
| 20 | * @subsys_device: Sub device ID for CDX device | |
| 2959ab24 NG |
21 | * @bus_num: Bus number for this CDX device |
| 22 | * @dev_num: Device number for this device | |
| 23 | * @res: array of MMIO region entries | |
| 24 | * @res_count: number of valid MMIO regions | |
| 25 | * @req_id: Requestor ID associated with CDX device | |
| fa10f413 AG |
26 | * @class: Class of the CDX Device |
| 27 | * @revision: Revision of the CDX device | |
| 2959ab24 NG |
28 | */ |
| 29 | struct cdx_dev_params { | |
| 30 | struct cdx_controller *cdx; | |
| ce558a39 | 31 | struct device *parent; |
| 2959ab24 NG |
32 | u16 vendor; |
| 33 | u16 device; | |
| fa10f413 AG |
34 | u16 subsys_vendor; |
| 35 | u16 subsys_device; | |
| 2959ab24 NG |
36 | u8 bus_num; |
| 37 | u8 dev_num; | |
| 38 | struct resource res[MAX_CDX_DEV_RESOURCES]; | |
| 39 | u8 res_count; | |
| 40 | u32 req_id; | |
| fa10f413 AG |
41 | u32 class; |
| 42 | u8 revision; | |
| 2959ab24 NG |
43 | }; |
| 44 | ||
| 45 | /** | |
| 46 | * cdx_register_controller - Register a CDX controller and its ports | |
| 47 | * on the CDX bus. | |
| 48 | * @cdx: The CDX controller to register | |
| 49 | * | |
| 50 | * Return: -errno on failure, 0 on success. | |
| 51 | */ | |
| 52 | int cdx_register_controller(struct cdx_controller *cdx); | |
| 53 | ||
| 54 | /** | |
| 55 | * cdx_unregister_controller - Unregister a CDX controller | |
| 56 | * @cdx: The CDX controller to unregister | |
| 57 | */ | |
| 58 | void cdx_unregister_controller(struct cdx_controller *cdx); | |
| 59 | ||
| 60 | /** | |
| 61 | * cdx_device_add - Add a CDX device. This function adds a CDX device | |
| 62 | * on the CDX bus as per the device parameters provided | |
| 63 | * by caller. It also creates and registers an associated | |
| 64 | * Linux generic device. | |
| 65 | * @dev_params: device parameters associated with the device to be created. | |
| 66 | * | |
| 67 | * Return: -errno on failure, 0 on success. | |
| 68 | */ | |
| 69 | int cdx_device_add(struct cdx_dev_params *dev_params); | |
| 70 | ||
| ce558a39 AG |
71 | /** |
| 72 | * cdx_bus_add - Add a CDX bus. This function adds a bus on the CDX bus | |
| 73 | * subsystem. It creates a CDX device for the corresponding bus and | |
| 74 | * also registers an associated Linux generic device. | |
| 75 | * @cdx: Associated CDX controller | |
| 76 | * @us_num: Bus number | |
| 77 | * | |
| 78 | * Return: associated Linux generic device pointer on success or NULL on failure. | |
| 79 | */ | |
| 80 | struct device *cdx_bus_add(struct cdx_controller *cdx, u8 bus_num); | |
| 81 | ||
| 2959ab24 | 82 | #endif /* _CDX_H_ */ |