drm/i915/pmu: Support multiple GPUs

[tomoyo/tomoyo-test1.git] / drivers / gpu / drm / i915 / i915_pmu.c

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index d050871..00fe401 100644 (file)
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -1080,6 +1080,17 @@ static void i915_pmu_unregister_cpuhp_state(struct i915_pmu *pmu)
        cpuhp_remove_multi_state(cpuhp_slot);
 }
 
+static bool is_igp(struct drm_i915_private *i915)
+{
+       struct pci_dev *pdev = i915->drm.pdev;
+
+       /* 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;
@@ -1110,10 +1121,19 @@ void i915_pmu_register(struct drm_i915_private *i915)
        hrtimer_init(&pmu->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
        pmu->timer.function = i915_sample;
 
-       ret = perf_pmu_register(&pmu->base, "i915", -1);
-       if (ret)
+       if (!is_igp(i915))
+               pmu->name = kasprintf(GFP_KERNEL,
+                                     "i915-%s",
+                                     dev_name(i915->drm.dev));
+       else
+               pmu->name = "i915";
+       if (!pmu->name)
                goto err;
 
+       ret = perf_pmu_register(&pmu->base, pmu->name, -1);
+       if (ret)
+               goto err_name;
+
        ret = i915_pmu_register_cpuhp_state(pmu);
        if (ret)
                goto err_unreg;
@@ -1122,6 +1142,9 @@ void i915_pmu_register(struct drm_i915_private *i915)
 
 err_unreg:
        perf_pmu_unregister(&pmu->base);
+err_name:
+       if (!is_igp(i915))
+               kfree(pmu->name);
 err:
        pmu->base.event_init = NULL;
        free_event_attributes(pmu);
@@ -1143,5 +1166,7 @@ void i915_pmu_unregister(struct drm_i915_private *i915)
 
        perf_pmu_unregister(&pmu->base);
        pmu->base.event_init = NULL;
+       if (!is_igp(i915))
+               kfree(pmu->name);
        free_event_attributes(pmu);
 }