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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>
23 lines
463 B
Plaintext
23 lines
463 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# CDX controller configuration
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#
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# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
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#
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if CDX_BUS
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config CDX_CONTROLLER
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tristate "CDX bus controller"
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select GENERIC_MSI_IRQ
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select REMOTEPROC
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select RPMSG
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help
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CDX controller drives the CDX bus. It interacts with
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firmware to get the hardware devices and registers with
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the CDX bus. Say Y to enable the CDX hardware driver.
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If unsure, say N.
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endif
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