1 // SPDX-License-Identifier: MIT
26 static int slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 freq)  in slpc_set_min_freq()  argument
30 	ret = intel_guc_slpc_set_min_freq(slpc, freq);  in slpc_set_min_freq()
32 		pr_err("Could not set min frequency to [%u]\n", freq);  in slpc_set_min_freq()
39 static int slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 freq)  in slpc_set_max_freq()  argument
43 	ret = intel_guc_slpc_set_max_freq(slpc, freq);  in slpc_set_max_freq()
46 		       freq);  in slpc_set_max_freq()
53 static int slpc_set_freq(struct intel_gt *gt, u32 freq)  in slpc_set_freq()  argument
56 	struct intel_guc_slpc *slpc = &gt_to_guc(gt)->slpc;  in slpc_set_freq()
58 	err = slpc_set_max_freq(slpc, freq);  in slpc_set_freq()
60 		pr_err("Unable to update max freq");  in slpc_set_freq()
64 	err = slpc_set_min_freq(slpc, freq);  in slpc_set_freq()
66 		pr_err("Unable to update min freq");  in slpc_set_freq()
73 static int slpc_restore_freq(struct intel_guc_slpc *slpc, u32 min, u32 max)  in slpc_restore_freq()  argument
77 	err = slpc_set_max_freq(slpc, max);  in slpc_restore_freq()
79 		pr_err("Unable to restore max freq");  in slpc_restore_freq()
85 		pr_err("Unable to restore min freq");  in slpc_restore_freq()
91 		pr_err("Unable to restore efficient freq");  in slpc_restore_freq()
98 static u64 measure_power_at_freq(struct intel_gt *gt, int *freq, u64 *power)  in measure_power_at_freq()  argument
102 	err = slpc_set_freq(gt, *freq);  in measure_power_at_freq()
105 	*freq = intel_rps_read_actual_frequency(&gt->rps);  in measure_power_at_freq()
106 	*power = measure_power(&gt->rps, freq);  in measure_power_at_freq()
118 	/* Go from max to min in 5 steps */  in vary_max_freq()
119 	step = (slpc->rp0_freq - slpc->min_freq) / NUM_STEPS;  in vary_max_freq()
120 	*max_act_freq = slpc->min_freq;  in vary_max_freq()
121 	for (max_freq = slpc->rp0_freq; max_freq > slpc->min_freq;  in vary_max_freq()
122 				max_freq -= step) {  in vary_max_freq()
129 		/* GuC requests freq in multiples of 50/3 MHz */  in vary_max_freq()
133 			err = -EINVAL;  in vary_max_freq()
154 	/* Go from min to max in 5 steps */  in vary_min_freq()
155 	step = (slpc->rp0_freq - slpc->min_freq) / NUM_STEPS;  in vary_min_freq()
156 	*max_act_freq = slpc->min_freq;  in vary_min_freq()
157 	for (min_freq = slpc->min_freq; min_freq < slpc->rp0_freq;  in vary_min_freq()
165 		/* GuC requests freq in multiples of 50/3 MHz */  in vary_min_freq()
166 		if (req_freq < (min_freq - FREQUENCY_REQ_UNIT)) {  in vary_min_freq()
168 			       min_freq - FREQUENCY_REQ_UNIT);  in vary_min_freq()
169 			err = -EINVAL;  in vary_min_freq()
185 	struct intel_guc_slpc *slpc = &gt_to_guc(gt)->slpc;  in slpc_power()
188 		int freq;  in slpc_power()  member
189 	} min, max;  in slpc_power()  local
197 	if (!librapl_supported(gt->i915))  in slpc_power()
200 	min.freq = slpc->min_freq;  in slpc_power()
201 	err = measure_power_at_freq(gt, &min.freq, &min.power);  in slpc_power()
206 	max.freq = slpc->rp0_freq;  in slpc_power()
207 	err = measure_power_at_freq(gt, &max.freq, &max.power);  in slpc_power()
212 	pr_info("%s: min:%llumW @ %uMHz, max:%llumW @ %uMHz\n",  in slpc_power()
213 		engine->name,  in slpc_power()
214 		min.power, min.freq,  in slpc_power()
215 		max.power, max.freq);  in slpc_power()
217 	if (10 * min.freq >= 9 * max.freq) {  in slpc_power()
219 			  min.freq, max.freq);  in slpc_power()
222 	if (11 * min.power > 10 * max.power) {  in slpc_power()
224 		       engine->name);  in slpc_power()
225 		err = -EINVAL;  in slpc_power()
228 	/* Restore min/max frequencies */  in slpc_power()
229 	slpc_set_max_freq(slpc, slpc->rp0_freq);  in slpc_power()
230 	slpc_set_min_freq(slpc, slpc->min_freq);  in slpc_power()
241 	err = slpc_set_min_freq(slpc, slpc->rp0_freq);  in max_granted_freq()
246 	if (*max_act_freq != slpc->rp0_freq) {  in max_granted_freq()
248 		perf_limit_reasons = intel_uncore_read(gt->uncore,  in max_granted_freq()
253 			pr_err("Pcode did not grant max freq\n");  in max_granted_freq()
254 			err = -EINVAL;  in max_granted_freq()
265 	struct intel_guc_slpc *slpc = &gt_to_guc(gt)->slpc;  in run_test()
266 	struct intel_rps *rps = &gt->rps;  in run_test()
274 	if (!intel_uc_uses_guc_slpc(&gt->uc))  in run_test()
277 	if (slpc->min_freq == slpc->rp0_freq) {  in run_test()
278 		pr_err("Min/Max are fused to the same value\n");  in run_test()
279 		return -EINVAL;  in run_test()
283 		return -ENOMEM;  in run_test()
286 		pr_err("Could not get SLPC max freq\n");  in run_test()
287 		return -EIO;  in run_test()
291 		pr_err("Could not get SLPC min freq\n");  in run_test()
292 		return -EIO;  in run_test()
297 	 * range of RPn-RP0.  in run_test()
299 	err = slpc_set_min_freq(slpc, slpc->min_freq);  in run_test()
301 		pr_err("Unable to update min freq!");  in run_test()
310 		pr_err("Unable to turn off efficient freq!");  in run_test()
326 						engine->kernel_context,  in run_test()
338 			       engine->name);  in run_test()
341 			intel_gt_set_wedged(engine->gt);  in run_test()
342 			err = -EIO;  in run_test()
358 			if (gt->type != GT_MEDIA && (engine->class == VIDEO_DECODE_CLASS ||  in run_test()
359 						     engine->class == VIDEO_ENHANCEMENT_CLASS)) {  in run_test()
375 			pr_info("Max actual frequency for %s was %d\n",  in run_test()
376 				engine->name, max_act_freq);  in run_test()
379 			if (max_act_freq <= slpc->min_freq) {  in run_test()
380 				pr_err("Actual freq did not rise above min\n");  in run_test()
382 				       intel_uncore_read(gt->uncore,  in run_test()
384 				err = -EINVAL;  in run_test()
395 	/* Restore min/max/efficient frequencies */  in run_test()
398 	if (igt_flush_test(gt->i915))  in run_test()
399 		err = -EIO;  in run_test()
477 	thread->result = run_test(thread->gt, TILE_INTERACTION);  in slpc_spinner_thread()
489 		return -ENOMEM;  in live_slpc_tile_interaction()
492 		threads[i].worker = kthread_create_worker(0, "igt/slpc_parallel:%d", gt->info.id);  in live_slpc_tile_interaction()
513 			pr_err("%s GT %d failed ", __func__, gt->info.id);  in live_slpc_tile_interaction()