linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
	Max Gurtovoy <mgurtovoy@nvidia.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
	"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
	Linuxarm <linuxarm@huawei.com>,
	liulongfang <liulongfang@huawei.com>,
	"Zengtao (B)" <prime.zeng@hisilicon.com>,
	yuzenghui <yuzenghui@huawei.com>,
	Jonathan Cameron <jonathan.cameron@huawei.com>,
	"Wangzhou (B)" <wangzhou1@hisilicon.com>
Subject: Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices
Date: Tue, 6 Jul 2021 06:59:54 +0300	[thread overview]
Message-ID: <YOPVOnRXPWGvloIT@unreal> (raw)
In-Reply-To: <20210705183247.GU4459@nvidia.com>

On Mon, Jul 05, 2021 at 03:32:47PM -0300, Jason Gunthorpe wrote:
> On Mon, Jul 05, 2021 at 09:27:37PM +0300, Leon Romanovsky wrote:
> 
> > > I think, in any case, it would be good to update the Documentation based on
> > > which way we end up doing this.
> > 
> > The request to update Documentation can be seen as an example of
> > choosing not-good API decisions. Expectation to see all drivers to
> > use same callbacks with same vfio-core function calls sounds strange
> > to me.
> 
> It is not vfio-core, it is vfio-pci-core. It is similar to how some of
> the fops stuff works, eg the generic_file whatever functions everyone
> puts in.

It doesn't really matter if it is vfio-core or vfio-pci-core. This looks
horrible and it is going to be repeated for every driver:

+       .release        = vfio_pci_core_release,
+       .ioctl          = vfio_pci_core_ioctl,
+       .read           = vfio_pci_core_read,
+       .write          = vfio_pci_core_write,
+       .mmap           = vfio_pci_core_mmap,
+       .request        = vfio_pci_core_request,
+       .match          = vfio_pci_core_match,
+       .reflck_attach  = vfio_pci_core_reflck_attach,
+};

At some point of time you will add new .XXX callback and will
find yourself changing all drivers to have something like
".XXX = vfio_pci_core_XXX,"

Thanks

  reply	other threads:[~2021-07-06  4:00 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-02  9:58 [RFC v2 0/4] vfio/hisilicon: add acc live migration driver Shameer Kolothum
2021-07-02  9:58 ` [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices Shameer Kolothum
2021-07-02 20:29   ` Alex Williamson
2021-07-05  7:20     ` Shameerali Kolothum Thodi
2021-07-04  7:03   ` Leon Romanovsky
2021-07-05  8:47     ` Shameerali Kolothum Thodi
2021-07-05  9:41       ` Max Gurtovoy
2021-07-05 10:18         ` Shameerali Kolothum Thodi
2021-07-05 18:27           ` Leon Romanovsky
2021-07-05 18:32             ` Jason Gunthorpe
2021-07-06  3:59               ` Leon Romanovsky [this message]
2021-07-06  4:39               ` Christoph Hellwig
2021-07-06 11:51                 ` Jason Gunthorpe
2021-07-02  9:58 ` [RFC v2 2/4] hisi_acc_vfio_pci: Override ioctl method to limit BAR2 region size Shameer Kolothum
2021-07-02 20:29   ` Alex Williamson
2021-07-05  7:22     ` Shameerali Kolothum Thodi
2021-07-02  9:58 ` [RFC v2 3/4] crypto: hisilicon/qm - Export mailbox functions for common use Shameer Kolothum
2021-07-04  9:34   ` Max Gurtovoy
2021-07-05 10:23     ` Shameerali Kolothum Thodi
2021-07-02  9:58 ` [RFC v2 4/4] hisi_acc_vfio_pci: Add support for vfio live migration Shameer Kolothum

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YOPVOnRXPWGvloIT@unreal \
    --to=leon@kernel.org \
    --cc=alex.williamson@redhat.com \
    --cc=jgg@nvidia.com \
    --cc=jonathan.cameron@huawei.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxarm@huawei.com \
    --cc=liulongfang@huawei.com \
    --cc=mgurtovoy@nvidia.com \
    --cc=prime.zeng@hisilicon.com \
    --cc=shameerali.kolothum.thodi@huawei.com \
    --cc=wangzhou1@hisilicon.com \
    --cc=yuzenghui@huawei.com \
    --subject='Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).