linux/cdx/cdx_bus.h

1 /* SPDX-License-Identifier: GPL-2.0
3  * CDX bus public interface
5  * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
57  * CDX_DEVICE - macro used to describe a specific CDX device
70  * CDX_DEVICE_DRIVER_OVERRIDE - macro used to describe a CDX device with
85  * struct cdx_ops - Callbacks supported by CDX controller.
86  * @bus_enable: enable bus on the controller
87  * @bus_disable: disable bus on the controller
105  * @controller_registered: controller registered with bus
118  * struct cdx_device - CDX device object
127  * @bus_num: Bus number for this CDX device
136  * @is_bus: Is this bus device
137  * @enabled: is this bus enabled
176 #define cdx_resource_start(dev, num)	((dev)->res[(num)].start)  argument
177 #define cdx_resource_end(dev, num)	((dev)->res[(num)].end)  argument
178 #define cdx_resource_flags(dev, num)	((dev)->res[(num)].flags)  argument
179 #define cdx_resource_len(dev, num) \  argument
180 	((cdx_resource_start((dev), (num)) == 0 &&	\
181 	  cdx_resource_end((dev), (num)) ==		\
182 	  cdx_resource_start((dev), (num))) ? 0 :	\
183 	 (cdx_resource_end((dev), (num)) -		\
184 	  cdx_resource_start((dev), (num)) + 1))
186  * struct cdx_driver - CDX device driver
221  * __cdx_driver_register - registers a CDX device driver
225  * Return: -errno on failure, 0 on success.
231  * cdx_driver_unregister - unregisters a device driver from the
232  * CDX bus.
240  * cdx_dev_reset - Reset CDX device
243  * Return: 0 for success, -errno on failure
248  * cdx_set_master - enables bus-mastering for CDX device
251  * Return: 0 for success, -errno on failure
256  * cdx_clear_master - disables bus-mastering for CDX device
259  * Return: 0 for success, -errno on failure
265  * cdx_enable_msi - Enable MSI for the CDX device.
268  * Return: 0 for success, -errno on failure
273  * cdx_disable_msi - Disable MSI for the CDX device.
282 	return -ENODEV;  in cdx_enable_msi()