[PATCH i-g-t v2 23/43] lib/igt_device_scan: Allow to find device by sysname

[José Expósito]

Hi Kamil,

On Wed, Jun 11, 2025 at 01:09:16PM +0200, Kamil Konieczny wrote:
> Hi José,
> On 2025-03-13 at 18:32:58 +0100, José Expósito wrote:
> > The VKMS driver allows to create multiple devices handled by the same
> > driver but with a different sysname.
> > 
> > In order to differentiate between them, allow to find devices by
> > sysname.
> > 
> > Signed-off-by: José Expósito <jose.exposito89 at gmail.com>
> 
> Please rebase your series as few of configfs changes got merged.
> 
> Also for this change +cc Zbigniew
> Cc: "Zbigniew Kempczyński" <zbigniew.kempczynski at intel.com>

Thanks a lot for your interest on this series.

I rebased on top of the latest master code and sent v3 here:
https://lore.kernel.org/igt-dev/20250715102513.5636-1-jose.exposito89@gmail.com/T/

Best wishes,
José Expósito
 
> Regards,
> Kamil
> 
> > ---
> >  lib/igt_device_scan.c | 22 ++++++++++++++++++++++
> >  lib/igt_device_scan.h |  2 ++
> >  2 files changed, 24 insertions(+)
> > 
> > diff --git a/lib/igt_device_scan.c b/lib/igt_device_scan.c
> > index 711bedc5c..5cbd347a3 100644
> > --- a/lib/igt_device_scan.c
> > +++ b/lib/igt_device_scan.c
> > @@ -231,6 +231,7 @@ struct igt_device {
> >  	char *subsystem;
> >  	char *syspath;
> >  	char *devnode;
> > +	char *sysname;
> >  
> >  	/* /dev/dri/... paths */
> >  	char *drm_card;
> > @@ -664,6 +665,7 @@ static struct igt_device *igt_device_new_from_udev(struct udev_device *dev,
> >  	idev->syspath = strdup_nullsafe(udev_device_get_syspath(dev));
> >  	idev->subsystem = strdup_nullsafe(udev_device_get_subsystem(dev));
> >  	idev->devnode = strdup_nullsafe(udev_device_get_devnode(dev));
> > +	idev->sysname = strdup_nullsafe(udev_device_get_sysname(dev));
> >  
> >  	if (idev->devnode && strstr(idev->devnode, "/dev/dri/card"))
> >  		idev->drm_card = strdup(idev->devnode);
> > @@ -2059,6 +2061,26 @@ bool igt_device_card_match_pci(const char *filter,
> >         return __igt_device_card_match(filter, card, true);
> >  }
> >  
> > +bool igt_device_find_card_by_sysname(const char *sysname,
> > +				     struct igt_device_card *card)
> > +{
> > +	struct igt_device *dev;
> > +
> > +	igt_assert(card);
> > +	igt_assert(sysname);
> > +
> > +	memset(card, 0, sizeof(*card));
> > +
> > +	igt_list_for_each_entry(dev, &igt_devs.all, link) {
> > +		if (strcmp(dev->sysname, sysname) == 0) {
> > +			__copy_dev_to_card(dev, card);
> > +			return true;
> > +		}
> > +	}
> > +
> > +	return false;
> > +}
> > +
> >  /**
> >   * igt_device_get_pretty_name
> >   * @card: pointer to igt_device_card struct
> > diff --git a/lib/igt_device_scan.h b/lib/igt_device_scan.h
> > index 92741fe3c..2a61777b0 100644
> > --- a/lib/igt_device_scan.h
> > +++ b/lib/igt_device_scan.h
> > @@ -92,6 +92,8 @@ bool igt_device_find_first_i915_discrete_card(struct igt_device_card *card);
> >  bool igt_device_find_integrated_card(struct igt_device_card *card);
> >  bool igt_device_find_first_xe_discrete_card(struct igt_device_card *card);
> >  bool igt_device_find_xe_integrated_card(struct igt_device_card *card);
> > +bool igt_device_find_card_by_sysname(const char *sysname,
> > +				     struct igt_device_card *card);
> >  char *igt_device_get_pretty_name(struct igt_device_card *card, bool numeric);
> >  int igt_open_card(struct igt_device_card *card);
> >  int igt_open_render(struct igt_device_card *card);
> > -- 
> > 2.48.1
> >