1 // SPDX-License-Identifier: GPL-2.0-only
5 #include <linux/delay.h>
61 	[IFS_NO_ERROR] = "SCAN no error",
63 	[IFS_INTERRUPTED_BEFORE_RENDEZVOUS] = "Interrupt occurred prior to SCAN coordination.",
65 	"Core Abort SCAN Response due to power management condition.",
68 	[IFS_CORE_NOT_CAPABLE_CURRENTLY] = "Core not capable of performing SCAN currently",
71 	"Exceeded number of Logical Processors (LP) allowed to run Scan-At-Field concurrently",
72 	[IFS_INTERRUPTED_DURING_EXECUTION] = "Interrupt occurred prior to SCAN start",
74 	[IFS_CORRUPTED_CHUNK] = "Scan operation aborted due to corrupted image. Try reloading",
87 		dev_warn(dev, "CPU(s) %*pbl: Scan controller error. Batch: %02x version: 0x%x\n",  in message_not_tested()
88 			 cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_not_tested()
93 		dev_info(dev, "CPU(s) %*pbl: SCAN operation did not start. %s\n",  in message_not_tested()
97 		dev_info(dev, "CPU(s) %*pbl: software timeout during scan\n",  in message_not_tested()
102 			 "Not all scan chunks were executed. Maximum forward progress retries exceeded");  in message_not_tested()
104 		dev_info(dev, "CPU(s) %*pbl: SCAN unknown status %llx\n",  in message_not_tested()
114 	 * signature_error is set when the output from the scan chains does not  in message_fail()
122 			cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_fail()
130 	/* Signature for chunk is bad, or scan test failed */  in can_restart()
172 		timeout -= SPINUNIT;  in wait_for_sibling_cpu()
178  * Execute the scan. Called "simultaneously" on all threads of a core
189 	ifsd = params->ifsd;  in doscan()
191 	if (ifsd->generation) {  in doscan()
192 		start = params->activate->gen2.start;  in doscan()
193 		stop = params->activate->gen2.stop;  in doscan()
195 		start = params->activate->gen0.start;  in doscan()
196 		stop = params->activate->gen0.stop;  in doscan()
206 	 * to this MSR (at most for activate.delay cycles). Then it  in doscan()
207 	 * starts scan of each requested chunk. The core scan happens  in doscan()
212 	wrmsrl(MSR_ACTIVATE_SCAN, params->activate->data);  in doscan()
215 	trace_ifs_status(ifsd->cur_batch, start, stop, status.data);  in doscan()
217 	/* Pass back the result of the scan */  in doscan()
219 		params->status = status;  in doscan()
244 	activate.delay = IFS_THREAD_WAIT;  in ifs_test_core()
247 	to_stop = ifsd->valid_chunks - 1;  in ifs_test_core()
251 	if (ifsd->generation) {  in ifs_test_core()
278 		status_chunk = ifsd->generation ? status.gen2.chunk_num : status.gen0.chunk_num;  in ifs_test_core()
281 			if (--retries == 0) {  in ifs_test_core()
288 			if (ifsd->generation)  in ifs_test_core()
297 	ifsd->scan_details = status.data;  in ifs_test_core()
300 		ifsd->status = SCAN_TEST_FAIL;  in ifs_test_core()
303 		ifsd->status = SCAN_NOT_TESTED;  in ifs_test_core()
306 		ifsd->status = SCAN_TEST_PASS;  in ifs_test_core()
324 		wrmsrl(MSR_ARRAY_BIST, command->data);  in do_array_test()
326 		rdmsrl(MSR_ARRAY_BIST, command->data);  in do_array_test()
356 	ifsd->scan_details = command.data;  in ifs_array_test_core()
359 		ifsd->status = SCAN_TEST_FAIL;  in ifs_array_test_core()
361 		ifsd->status = SCAN_NOT_TESTED;  in ifs_array_test_core()
363 		ifsd->status = SCAN_TEST_PASS;  in ifs_array_test_core()
390 	ifsd->scan_details = status;  in ifs_array_test_gen1()
393 		ifsd->status = SCAN_TEST_FAIL;  in ifs_array_test_gen1()
395 		ifsd->status = SCAN_TEST_PASS;  in ifs_array_test_gen1()
424 	[IFS_SBAF_INVALID_BUNDLE_INDEX] = "Non-valid sbaf bundles. Reload test image",
428 …ONCURRENT] = "Exceeded number of Logical Processors (LP) allowed to run Scan-At-Field concurrently…
444 		dev_info(dev, "CPU(s) %*pbl: software timeout during scan\n",  in sbaf_message_not_tested()
480 	/* Signature for chunk is bad, or scan test failed */  in sbaf_can_restart()
517 	ifsd = run_params->ifsd;  in dosbaf()
525 	 * to this MSR (at most for activate.delay cycles). Then it  in dosbaf()
526 	 * starts scan of each requested bundle. The core test happens  in dosbaf()
529 	wrmsrl(MSR_ACTIVATE_SBAF, run_params->activate->data);  in dosbaf()
531 	trace_ifs_sbaf(ifsd->cur_batch, *run_params->activate, status);  in dosbaf()
535 		run_params->status = status;  in dosbaf()
553 	activate.delay = IFS_THREAD_WAIT;  in ifs_sbaf_test_core()
558 	stop_bundle = ifsd->max_bundle;  in ifs_sbaf_test_core()
588 			if (--retries == 0) {  in ifs_sbaf_test_core()
602 	ifsd->scan_details = status.data;  in ifs_sbaf_test_core()
606 		ifsd->status = SCAN_TEST_FAIL;  in ifs_sbaf_test_core()
610 		ifsd->status = SCAN_NOT_TESTED;  in ifs_sbaf_test_core()
613 		ifsd->status = SCAN_TEST_PASS;  in ifs_sbaf_test_core()
619  * its sibling cpu. Once all sibling threads wake up, the scan test gets executed and
620  * wait for all sibling threads to finish the scan test.
628 	/* Prevent CPUs from being taken offline during the scan test */  in do_core_test()
633 		ret = -EINVAL;  in do_core_test()
637 	switch (test->test_num) {  in do_core_test()
639 		if (!ifsd->loaded)  in do_core_test()
640 			ret = -EPERM;  in do_core_test()
645 		if (ifsd->array_gen == ARRAY_GEN0)  in do_core_test()
651 		if (!ifsd->loaded)  in do_core_test()
652 			ret = -EPERM;  in do_core_test()
657 		ret = -EINVAL;  in do_core_test()