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This test checks if there is any throttling but does not fail > if RP0 is not granted due to throttle reasons > > v2: Fix build error > v3: Use IS_ERR_OR_NULL to check worker > Addressed cosmetic review comments (Tvrtko) > v4: do not skip test on media engines if gt type is GT_MEDIA. > Use correct PERF_LIMIT_REASONS register for MTL (Vinay) LGTM. Reviewed-by: Vinay Belgaumkar > > Signed-off-by: Riana Tauro > --- > drivers/gpu/drm/i915/gt/selftest_slpc.c | 70 +++++++++++++++++++++++-- > 1 file changed, 66 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/selftest_slpc.c b/drivers/gpu/drm/i915/gt/selftest_slpc.c > index 82ec95a299f6..bd44ce73a504 100644 > --- a/drivers/gpu/drm/i915/gt/selftest_slpc.c > +++ b/drivers/gpu/drm/i915/gt/selftest_slpc.c > @@ -13,6 +13,14 @@ enum test_type { > VARY_MAX, > MAX_GRANTED, > SLPC_POWER, > + TILE_INTERACTION, > +}; > + > +struct slpc_thread { > + struct kthread_worker *worker; > + struct kthread_work work; > + struct intel_gt *gt; > + int result; > }; > > static int slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 freq) > @@ -212,7 +220,8 @@ static int max_granted_freq(struct intel_guc_slpc *slpc, struct intel_rps *rps, > *max_act_freq = intel_rps_read_actual_frequency(rps); > if (*max_act_freq != slpc->rp0_freq) { > /* Check if there was some throttling by pcode */ > - perf_limit_reasons = intel_uncore_read(gt->uncore, GT0_PERF_LIMIT_REASONS); > + perf_limit_reasons = intel_uncore_read(gt->uncore, > + intel_gt_perf_limit_reasons_reg(gt)); > > /* If not, this is an error */ > if (!(perf_limit_reasons & GT0_PERF_LIMIT_REASONS_MASK)) { > @@ -310,9 +319,10 @@ static int run_test(struct intel_gt *gt, int test_type) > break; > > case MAX_GRANTED: > + case TILE_INTERACTION: > /* Media engines have a different RP0 */ > - if (engine->class == VIDEO_DECODE_CLASS || > - engine->class == VIDEO_ENHANCEMENT_CLASS) { > + if (gt->type != GT_MEDIA && (engine->class == VIDEO_DECODE_CLASS || > + engine->class == VIDEO_ENHANCEMENT_CLASS)) { > igt_spinner_end(&spin); > st_engine_heartbeat_enable(engine); > err = 0; > @@ -335,7 +345,8 @@ static int run_test(struct intel_gt *gt, int test_type) > if (max_act_freq <= slpc->min_freq) { > pr_err("Actual freq did not rise above min\n"); > pr_err("Perf Limit Reasons: 0x%x\n", > - intel_uncore_read(gt->uncore, GT0_PERF_LIMIT_REASONS)); > + intel_uncore_read(gt->uncore, > + intel_gt_perf_limit_reasons_reg(gt))); > err = -EINVAL; > } > } > @@ -426,6 +437,56 @@ static int live_slpc_power(void *arg) > return ret; > } > > +static void slpc_spinner_thread(struct kthread_work *work) > +{ > + struct slpc_thread *thread = container_of(work, typeof(*thread), work); > + > + thread->result = run_test(thread->gt, TILE_INTERACTION); > +} > + > +static int live_slpc_tile_interaction(void *arg) > +{ > + struct drm_i915_private *i915 = arg; > + struct intel_gt *gt; > + struct slpc_thread *threads; > + int i = 0, ret = 0; > + > + threads = kcalloc(I915_MAX_GT, sizeof(*threads), GFP_KERNEL); > + if (!threads) > + return -ENOMEM; > + > + for_each_gt(gt, i915, i) { > + threads[i].worker = kthread_create_worker(0, "igt/slpc_parallel:%d", gt->info.id); > + > + if (IS_ERR(threads[i].worker)) { > + ret = PTR_ERR(threads[i].worker); > + break; > + } > + > + threads[i].gt = gt; > + kthread_init_work(&threads[i].work, slpc_spinner_thread); > + kthread_queue_work(threads[i].worker, &threads[i].work); > + } > + > + for_each_gt(gt, i915, i) { > + int status; > + > + if (IS_ERR_OR_NULL(threads[i].worker)) > + continue; > + > + kthread_flush_work(&threads[i].work); > + status = READ_ONCE(threads[i].result); > + if (status && !ret) { > + pr_err("%s GT %d failed ", __func__, gt->info.id); > + ret = status; > + } > + kthread_destroy_worker(threads[i].worker); > + } > + > + kfree(threads); > + return ret; > +} > + > int intel_slpc_live_selftests(struct drm_i915_private *i915) > { > static const struct i915_subtest tests[] = { > @@ -433,6 +494,7 @@ int intel_slpc_live_selftests(struct drm_i915_private *i915) > SUBTEST(live_slpc_vary_min), > SUBTEST(live_slpc_max_granted), > SUBTEST(live_slpc_power), > + SUBTEST(live_slpc_tile_interaction), > }; > > struct intel_gt *gt;