linux-kernel - Re: [PATCH] PCI: Add ASPEED vendor ID

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Message-ID: <20230420191036.GA315493@bhelgaas>
Date:   Thu, 20 Apr 2023 14:10:36 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     "open list:PCI SUBSYSTEM" <linux-pci@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR AST SERVER GRAPHICS CHIPS" 
        <dri-devel@...ts.freedesktop.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Dave Airlie <airlied@...hat.com>,
        Patrick McLean <chutzpah@...too.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        linux-ide@...r.kernel.org
Subject: Re: [PATCH] PCI: Add ASPEED vendor ID

[+cc Damien, linux-ide]

On Thu, Apr 20, 2023 at 09:08:48AM +0200, Thomas Zimmermann wrote:
> Am 19.04.23 um 20:37 schrieb Bjorn Helgaas:
> > On Wed, Apr 19, 2023 at 09:00:15AM +0200, Thomas Zimmermann wrote:
> > > Am 19.04.23 um 00:57 schrieb Patrick McLean:
> > > > Currently the ASPEED PCI vendor ID is defined in
> > > > drivers/gpu/drm/ast/ast_drv.c, move that to include/linux/pci_ids.h
> > > > with all the rest of the PCI vendor ID definitions. Rename the definition
> > > > to follow the format that the other definitions follow.
> > > 
> > > Thanks a lot. Can you please also move and rename the PCI device ids? [1]
> > 
> > Generally we move things to pci_ids.h only when they are shared
> > between multiple drivers.  This is mostly to make backports easier.
> > 
> > PCI_VENDOR_ID_ASPEED is (or will be) used in both ast_drv.c and
> > libata-core.c, so it qualifies.
> > 
> > It doesn't look like PCI_CHIP_AST2000 and PCI_CHIP_AST2100 would
> > qualify since they're only used in ast_drv.c and ast_main.c, which are
> > part of the same driver.
> 
> Ok, I see. Can I take the patch into DRM trees?

The first time around I got two patches [2].  This time I only got
this patch, but IIUC there are still two patches in play here:

  - This one, which moves PCI_VENDOR_ID_ASPEED to pci_ids.h, and
  - The libata-core one that adds a use in ata_dev_config_ncq()

Those should go together via the same tree.  I supplied my ack to
indicate that I'm not going to merge anything myself, and I expect
whoever merges the libata patch to also merge this one.

If for some reason the libata-core patch doesn't happen, then this
patch shouldn't happen either, because there would no longer be any
sharing between drivers that would justify a pci_ids.h addition.

Bjorn

[2] https://lore.kernel.org/r/20230418011720.3900090-1-chutzpah@gentoo.org

> > > [1] https://elixir.bootlin.com/linux/v6.2/source/drivers/gpu/drm/ast/ast_drv.h#L52

> > > > Signed-off-by: Patrick McLean <chutzpah@...too.org>
> > > > ---
> > > >    drivers/gpu/drm/ast/ast_drv.c | 4 +---
> > > >    include/linux/pci_ids.h       | 2 ++
> > > >    2 files changed, 3 insertions(+), 3 deletions(-)
> > > > 
> > > > diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
> > > > index d78852c7cf5b..232e797793b6 100644
> > > > --- a/drivers/gpu/drm/ast/ast_drv.c
> > > > +++ b/drivers/gpu/drm/ast/ast_drv.c
> > > > @@ -70,12 +70,10 @@ static const struct drm_driver ast_driver = {
> > > >     * PCI driver
> > > >     */
> > > > -#define PCI_VENDOR_ASPEED 0x1a03
> > > > -
> > > >    #define AST_VGA_DEVICE(id, info) {		\
> > > >    	.class = PCI_BASE_CLASS_DISPLAY << 16,	\
> > > >    	.class_mask = 0xff0000,			\
> > > > -	.vendor = PCI_VENDOR_ASPEED,			\
> > > > +	.vendor = PCI_VENDOR_ID_ASPEED,			\
> > > >    	.device = id,				\
> > > >    	.subvendor = PCI_ANY_ID,		\
> > > >    	.subdevice = PCI_ANY_ID,		\
> > > > diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
> > > > index 45c3d62e616d..40e04e88ca5a 100644
> > > > --- a/include/linux/pci_ids.h
> > > > +++ b/include/linux/pci_ids.h
> > > > @@ -2553,6 +2553,8 @@
> > > >    #define PCI_DEVICE_ID_NETRONOME_NFP3800_VF	0x3803
> > > >    #define PCI_DEVICE_ID_NETRONOME_NFP6000_VF	0x6003
> > > > +#define PCI_VENDOR_ID_ASPEED		0x1a03
> > > > +
> > > >    #define PCI_VENDOR_ID_QMI		0x1a32
> > > >    #define PCI_VENDOR_ID_AZWAVE		0x1a3b
> > > 
> > > -- 
> > > Thomas Zimmermann
> > > Graphics Driver Developer
> > > SUSE Software Solutions Germany GmbH
> > > Maxfeldstr. 5, 90409 Nürnberg, Germany
> > > (HRB 36809, AG Nürnberg)
> > > Geschäftsführer: Ivo Totev
> > 
> > 
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Frankenstrasse 146, 90461 Nuernberg, Germany
> GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
> HRB 36809 (AG Nuernberg)