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Add CDX-MSI domain per CDX controller with gic-its domain as a parent, to support MSI for CDX devices. CDX devices allocate MSIs from the CDX domain. Also, introduce APIs to alloc and free IRQs for CDX domain. In CDX subsystem firmware is a controller for all devices and their configuration. CDX bus controller sends all the write_msi_msg commands to firmware running on RPU and the firmware interfaces with actual devices to pass this information to devices Since, CDX controller is the only way to communicate with the Firmware for MSI write info, CDX domain per controller required in contrast to having a CDX domain per device. Co-developed-by: Nikhil Agarwal <nikhil.agarwal@amd.com> Signed-off-by: Nikhil Agarwal <nikhil.agarwal@amd.com> Co-developed-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Signed-off-by: Nipun Gupta <nipun.gupta@amd.com> Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com> Link: https://lore.kernel.org/r/20240226082816.100872-1-nipun.gupta@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Header file for MCDI FW interaction for CDX bus.
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*
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* Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
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*/
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#ifndef CDX_MCDI_FUNCTIONS_H
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#define CDX_MCDI_FUNCTIONS_H
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#include "mcdi.h"
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#include "../cdx.h"
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/**
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* cdx_mcdi_get_num_buses - Get the total number of buses on
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* the controller.
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* @cdx: pointer to MCDI interface.
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*
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* Return: total number of buses available on the controller,
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* <0 on failure
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*/
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int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx);
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/**
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* cdx_mcdi_get_num_devs - Get the total number of devices on
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* a particular bus of the controller.
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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*
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* Return: total number of devices available on the bus, <0 on failure
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*/
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int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num);
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/**
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* cdx_mcdi_get_dev_config - Get configuration for a particular
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* bus_num:dev_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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* @dev_num: Device number.
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* @dev_params: Pointer to cdx_dev_params, this is populated by this
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* device with the configuration corresponding to the provided
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* bus_num:dev_num.
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*
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* Return: 0 total number of devices available on the bus, <0 on failure
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*/
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int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,
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u8 bus_num, u8 dev_num,
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struct cdx_dev_params *dev_params);
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/**
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* cdx_mcdi_bus_enable - Enable CDX bus represented by bus_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num);
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/**
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* cdx_mcdi_bus_disable - Disable CDX bus represented by bus_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num);
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/**
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* cdx_mcdi_write_msi - Write MSI configuration for CDX device
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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* @dev_num: Device number.
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* @msi_vector: Device-relative MSI vector number.
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* Must be < MSI_COUNT reported for the device.
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* @msi_address: MSI address to be used by the hardware. Typically, on ARM
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* systems this address is translated by the IOMMU (if enabled) and
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* it is the responsibility of the entity managing the IOMMU (APU kernel)
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* to supply the correct IOVA here.
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* @msi_data: MSI data to be used by the hardware. On versal-net, only the
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* lower 16-bits are used, the remaining bits are ignored and should be
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* set to zero.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_write_msi(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num,
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u32 msi_vector, u64 msi_address, u32 msi_data);
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/**
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* cdx_mcdi_reset_device - Reset cdx device represented by bus_num:dev_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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* @dev_num: Device number.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_reset_device(struct cdx_mcdi *cdx,
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u8 bus_num, u8 dev_num);
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/**
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* cdx_mcdi_bus_master_enable - Set/Reset bus mastering for cdx device
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* represented by bus_num:dev_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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* @dev_num: Device number.
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* @enable: Enable bus mastering if set, disable otherwise.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,
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u8 dev_num, bool enable);
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/**
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* cdx_mcdi_msi_enable - Enable/Disable MSIs for cdx device represented
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* by bus_num:dev_num
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* @cdx: pointer to MCDI interface.
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* @bus_num: Bus number.
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* @dev_num: Device number.
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* @enable: Enable msi's if set, disable otherwise.
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*
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* Return: 0 on success, <0 on failure
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*/
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int cdx_mcdi_msi_enable(struct cdx_mcdi *cdx, u8 bus_num,
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u8 dev_num, bool enable);
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#endif /* CDX_MCDI_FUNCTIONS_H */
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