linux-kernel - Re: [PATCH 4/7] drm/i915/pmu: Drop is

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Message-ID: <87a5i9c8m0.wl-ashutosh.dixit@intel.com>
Date: Mon, 22 Jul 2024 16:25:27 -0700
From: "Dixit, Ashutosh" <ashutosh.dixit@...el.com>
To: Lucas De Marchi <lucas.demarchi@...el.com>
Cc: intel-gfx@...ts.freedesktop.org,
	linux-perf-users@...r.kernel.org,
	Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
	dri-devel@...ts.freedesktop.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] drm/i915/pmu: Drop is_igp()

On Mon, 22 Jul 2024 14:06:45 -0700, Lucas De Marchi wrote:
>
> There's no reason to hardcode checking for integrated graphics on a
> specific pci slot. That information is already available per platform an
> can be checked with IS_DGFX().

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@...el.com>

> Signed-off-by: Lucas De Marchi <lucas.demarchi@...el.com>
> ---
>  drivers/gpu/drm/i915/i915_pmu.c | 17 +++--------------
>  1 file changed, 3 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
> index 3a8bd11b87e7..b5d14dd318e4 100644
> --- a/drivers/gpu/drm/i915/i915_pmu.c
> +++ b/drivers/gpu/drm/i915/i915_pmu.c
> @@ -1235,17 +1235,6 @@ static void i915_pmu_unregister_cpuhp_state(struct i915_pmu *pmu)
>	cpuhp_state_remove_instance(cpuhp_slot, &pmu->cpuhp.node);
>  }
>
> -static bool is_igp(struct drm_i915_private *i915)
> -{
> -	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
> -
> -	/* IGP is 0000:00:02.0 */
> -	return pci_domain_nr(pdev->bus) == 0 &&
> -	       pdev->bus->number == 0 &&
> -	       PCI_SLOT(pdev->devfn) == 2 &&
> -	       PCI_FUNC(pdev->devfn) == 0;
> -}
> -
>  void i915_pmu_register(struct drm_i915_private *i915)
>  {
>	struct i915_pmu *pmu = &i915->pmu;
> @@ -1269,7 +1258,7 @@ void i915_pmu_register(struct drm_i915_private *i915)
>	pmu->cpuhp.cpu = -1;
>	init_rc6(pmu);
>
> -	if (!is_igp(i915)) {
> +	if (IS_DGFX(i915)) {
>		pmu->name = kasprintf(GFP_KERNEL,
>				      "i915_%s",
>				      dev_name(i915->drm.dev));
> @@ -1323,7 +1312,7 @@ void i915_pmu_register(struct drm_i915_private *i915)
>	pmu->base.event_init = NULL;
>	free_event_attributes(pmu);
>  err_name:
> -	if (!is_igp(i915))
> +	if (IS_DGFX(i915))
>		kfree(pmu->name);
>  err:
>	drm_notice(&i915->drm, "Failed to register PMU!\n");
> @@ -1351,7 +1340,7 @@ void i915_pmu_unregister(struct drm_i915_private *i915)
>	perf_pmu_unregister(&pmu->base);
>	pmu->base.event_init = NULL;
>	kfree(pmu->base.attr_groups);
> -	if (!is_igp(i915))
> +	if (IS_DGFX(i915))
>		kfree(pmu->name);
>	free_event_attributes(pmu);
>  }
> --
> 2.43.0
>