From: Thomas Gleixner <tglx@linutronix.de>
To: Nipun Gupta <nipun.gupta@amd.com>,
gregkh@linuxfoundation.org, maz@kernel.org, jgg@ziepe.ca,
linux-kernel@vger.kernel.org
Cc: git@amd.com, harpreet.anand@amd.com,
pieter.jansen-van-vuuren@amd.com, nikhil.agarwal@amd.com,
michal.simek@amd.com, abhijit.gangurde@amd.com,
srivatsa@csail.mit.edu, Nipun Gupta <nipun.gupta@amd.com>
Subject: Re: [PATCH v8 1/2] cdx: add MSI support for CDX bus
Date: Fri, 23 Feb 2024 10:50:49 +0100 [thread overview]
Message-ID: <87y1bbcxvq.ffs@tglx> (raw)
In-Reply-To: <20240223092447.65564-1-nipun.gupta@amd.com>
On Fri, Feb 23 2024 at 14:54, Nipun Gupta wrote:
> 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>
> Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
prev parent reply other threads:[~2024-02-23 9:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-23 9:24 [PATCH v8 1/2] cdx: add MSI support for CDX bus Nipun Gupta
2024-02-23 9:24 ` [PATCH v8 2/2] add wrapper msi allocation API and export msi functions Nipun Gupta
2024-02-23 9:53 ` Thomas Gleixner
2024-02-23 10:00 ` [tip: irq/msi] genirq/msi: Export MSI allocation/free functions and provide a conveniance wrapper tip-bot2 for Nipun Gupta
2024-02-23 11:21 ` [PATCH v8 2/2] add wrapper msi allocation API and export msi functions Greg KH
[not found] ` <CH3PR12MB9193A635BC7952495469B2C5E8552@CH3PR12MB9193.namprd12.prod.outlook.com>
2024-02-23 12:39 ` Greg KH
2024-02-23 9:50 ` Thomas Gleixner [this message]
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