/* SPDX-License-Identifier: GPL-2.0 * * Header file for MCDI FW interaction for CDX bus. * * Copyright (C) 2022-2023, Advanced Micro Devices, Inc. */ #ifndef CDX_MCDI_FUNCTIONS_H#define CDX_MCDI_FUNCTIONS_H #include <linux/cdx/mcdi.h>#include "mcdid.h"#include "../cdx.h" /** * cdx_mcdi_get_num_buses - Get the total number of buses on *	the controller. * @cdx: pointer to MCDI interface. * * Return: total number of buses available on the controller, *	<0 on failure */int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx); /** * cdx_mcdi_get_num_devs - Get the total number of devices on *	a particular bus of the controller. * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * * Return: total number of devices available on the bus, <0 on failure */int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num); /** * cdx_mcdi_get_dev_config - Get configuration for a particular *	bus_num:dev_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * @dev_num: Device number. * @dev_params: Pointer to cdx_dev_params, this is populated by this *	device with the configuration corresponding to the provided *	bus_num:dev_num. * * Return: 0 total number of devices available on the bus, <0 on failure */int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,			    u8 bus_num, u8 dev_num,			    struct cdx_dev_params *dev_params); /** * cdx_mcdi_bus_enable - Enable CDX bus represented by bus_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * * Return: 0 on success, <0 on failure */int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num); /** * cdx_mcdi_bus_disable - Disable CDX bus represented by bus_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * * Return: 0 on success, <0 on failure */int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num); /** * cdx_mcdi_write_msi - Write MSI configuration for CDX device * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * @dev_num: Device number. * @msi_vector: Device-relative MSI vector number. *	Must be < MSI_COUNT reported for the device. * @msi_address: MSI address to be used by the hardware. Typically, on ARM *	systems this address is translated by the IOMMU (if enabled) and *	it is the responsibility of the entity managing the IOMMU (APU kernel) *	to supply the correct IOVA here. * @msi_data: MSI data to be used by the hardware. On versal-net, only the *	lower 16-bits are used, the remaining bits are ignored and should be *	set to zero. * * Return: 0 on success, <0 on failure */int cdx_mcdi_write_msi(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num,		       u32 msi_vector, u64 msi_address, u32 msi_data); /** * cdx_mcdi_reset_device - Reset cdx device represented by bus_num:dev_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * @dev_num: Device number. * * Return: 0 on success, <0 on failure */int cdx_mcdi_reset_device(struct cdx_mcdi *cdx,			  u8 bus_num, u8 dev_num); /** * cdx_mcdi_bus_master_enable - Set/Reset bus mastering for cdx device *				represented by bus_num:dev_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * @dev_num: Device number. * @enable: Enable bus mastering if set, disable otherwise. * * Return: 0 on success, <0 on failure */int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,			       u8 dev_num, bool enable); /** * cdx_mcdi_msi_enable - Enable/Disable MSIs for cdx device represented *			 by bus_num:dev_num * @cdx: pointer to MCDI interface. * @bus_num: Bus number. * @dev_num: Device number. * @enable: Enable msi's if set, disable otherwise. * * Return: 0 on success, <0 on failure */int cdx_mcdi_msi_enable(struct cdx_mcdi *cdx, u8 bus_num,			u8 dev_num, bool enable); #endif /* CDX_MCDI_FUNCTIONS_H */