linux-kernel - Re: [patch 21/32] NTB/msi: Convert to msi_on_each

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Message-ID: <87tufr7uax.ffs@tglx>
Date:   Thu, 02 Dec 2021 00:57:10 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Dave Jiang <dave.jiang@...el.com>, Jason Gunthorpe <jgg@...dia.com>
Cc:     Logan Gunthorpe <logang@...tatee.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Marc Zygnier <maz@...nel.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Megha Dey <megha.dey@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, linux-pci@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jon Mason <jdmason@...zu.us>, Allen Hubbe <allenbh@...il.com>,
        linux-ntb@...glegroups.com, linux-s390@...r.kernel.org,
        Heiko Carstens <hca@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>, x86@...nel.org,
        Joerg Roedel <jroedel@...e.de>,
        iommu@...ts.linux-foundation.org
Subject: Re: [patch 21/32] NTB/msi: Convert to msi_on_each_desc()

dave,

On Wed, Dec 01 2021 at 15:53, Dave Jiang wrote:
> On 12/1/2021 3:03 PM, Thomas Gleixner wrote:
>> This still depends on how this overall discussion about representation
>> of all of this stuff is resolved.
>>
>>>> What needs a subdevice to expose?
>> Can you answer that too please?
>
> Sorry. So initial version of the IDXD sub-device is represented with a 
> single queue. It needs a command irq (emulated) and a completion irq 
> that is backed by a device vector (currently IMS).

thanks for clarification! Let me think about it some more.

       tglx