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/* 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 "mcdi.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 */
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