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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/drivers/platform/x86/intel_telemetry_debugfs.c
....@@ -1,16 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Intel SOC Telemetry debugfs Driver: Currently supports APL
34  * Copyright (c) 2015, Intel Corporation.
45  * All Rights Reserved.
5
- *
6
- * This program is free software; you can redistribute it and/or modify it
7
- * under the terms and conditions of the GNU General Public License,
8
- * version 2, as published by the Free Software Foundation.
9
- *
10
- * This program is distributed in the hope it will be useful, but WITHOUT
11
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13
- * more details.
146  *
157  * This file provides the debugfs interfaces for telemetry.
168  * /sys/kernel/debug/telemetry/pss_info: Shows Primary Control Sub-Sys Counters
....@@ -23,6 +15,7 @@
2315  */
2416 #include <linux/debugfs.h>
2517 #include <linux/device.h>
18
+#include <linux/mfd/intel_pmc_bxt.h>
2619 #include <linux/module.h>
2720 #include <linux/pci.h>
2821 #include <linux/seq_file.h>
....@@ -30,7 +23,6 @@
3023 
3124 #include <asm/cpu_device_id.h>
3225 #include <asm/intel-family.h>
33
-#include <asm/intel_pmc_ipc.h>
3426 #include <asm/intel_telemetry.h>
3527 
3628 #define DRIVER_NAME			"telemetry_soc_debugfs"
....@@ -71,9 +63,6 @@
7163 #define TELEM_PSS_LTR_BLOCKING_EVTS	20
7264 #define TELEM_IOSS_DX_D0IX_EVTS		25
7365 #define TELEM_IOSS_PG_EVTS		30
74
-
75
-#define TELEM_DEBUGFS_CPU(model, data) \
76
-	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data}
7766 
7867 #define TELEM_CHECK_AND_PARSE_EVTS(EVTID, EVTNUM, BUF, EVTLOG, EVTDAT, MASK) { \
7968 	if (evtlog[index].telem_evtid == (EVTID)) { \
....@@ -319,11 +308,10 @@
319308 };
320309 
321310 static const struct x86_cpu_id telemetry_debugfs_cpu_ids[] = {
322
-	TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_debugfs_conf),
323
-	TELEM_DEBUGFS_CPU(INTEL_FAM6_ATOM_GOLDMONT_PLUS, telem_apl_debugfs_conf),
311
+	X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT,	&telem_apl_debugfs_conf),
312
+	X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_PLUS,	&telem_apl_debugfs_conf),
324313 	{}
325314 };
326
-
327315 MODULE_DEVICE_TABLE(x86cpu, telemetry_debugfs_cpu_ids);
328316 
329317 static int telemetry_debugfs_check_evts(void)
....@@ -477,17 +465,7 @@
477465 	return 0;
478466 }
479467 
480
-static int telem_pss_state_open(struct inode *inode, struct file *file)
481
-{
482
-	return single_open(file, telem_pss_states_show, inode->i_private);
483
-}
484
-
485
-static const struct file_operations telem_pss_ops = {
486
-	.open		= telem_pss_state_open,
487
-	.read		= seq_read,
488
-	.llseek		= seq_lseek,
489
-	.release	= single_release,
490
-};
468
+DEFINE_SHOW_ATTRIBUTE(telem_pss_states);
491469 
492470 static int telem_ioss_states_show(struct seq_file *s, void *unused)
493471 {
....@@ -516,17 +494,7 @@
516494 	return 0;
517495 }
518496 
519
-static int telem_ioss_state_open(struct inode *inode, struct file *file)
520
-{
521
-	return single_open(file, telem_ioss_states_show, inode->i_private);
522
-}
523
-
524
-static const struct file_operations telem_ioss_ops = {
525
-	.open		= telem_ioss_state_open,
526
-	.read		= seq_read,
527
-	.llseek		= seq_lseek,
528
-	.release	= single_release,
529
-};
497
+DEFINE_SHOW_ATTRIBUTE(telem_ioss_states);
530498 
531499 static int telem_soc_states_show(struct seq_file *s, void *unused)
532500 {
....@@ -675,24 +643,15 @@
675643 	return 0;
676644 }
677645 
678
-static int telem_soc_state_open(struct inode *inode, struct file *file)
679
-{
680
-	return single_open(file, telem_soc_states_show, inode->i_private);
681
-}
682
-
683
-static const struct file_operations telem_socstate_ops = {
684
-	.open		= telem_soc_state_open,
685
-	.read		= seq_read,
686
-	.llseek		= seq_lseek,
687
-	.release	= single_release,
688
-};
646
+DEFINE_SHOW_ATTRIBUTE(telem_soc_states);
689647 
690648 static int telem_s0ix_res_get(void *data, u64 *val)
691649 {
650
+	struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
692651 	u64 s0ix_total_res;
693652 	int ret;
694653 
695
-	ret = intel_pmc_s0ix_counter_read(&s0ix_total_res);
654
+	ret = intel_pmc_s0ix_counter_read(plt_config->pmc, &s0ix_total_res);
696655 	if (ret) {
697656 		pr_err("Failed to read S0ix residency");
698657 		return ret;
....@@ -727,13 +686,14 @@
727686 	u32 verbosity;
728687 	int err;
729688 
730
-	if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
731
-		return -EFAULT;
689
+	err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
690
+	if (err)
691
+		return err;
732692 
733693 	err = telemetry_set_trace_verbosity(TELEM_PSS, verbosity);
734694 	if (err) {
735695 		pr_err("Changing PSS Trace Verbosity Failed. Error %d\n", err);
736
-		count = err;
696
+		return err;
737697 	}
738698 
739699 	return count;
....@@ -774,13 +734,14 @@
774734 	u32 verbosity;
775735 	int err;
776736 
777
-	if (kstrtou32_from_user(userbuf, count, 0, &verbosity))
778
-		return -EFAULT;
737
+	err = kstrtou32_from_user(userbuf, count, 0, &verbosity);
738
+	if (err)
739
+		return err;
779740 
780741 	err = telemetry_set_trace_verbosity(TELEM_IOSS, verbosity);
781742 	if (err) {
782743 		pr_err("Changing IOSS Trace Verbosity Failed. Error %d\n", err);
783
-		count = err;
744
+		return err;
784745 	}
785746 
786747 	return count;
....@@ -877,12 +838,15 @@
877838 	 */
878839 	if (suspend_shlw_ctr_exit == suspend_shlw_ctr_temp &&
879840 	    suspend_deep_ctr_exit == suspend_deep_ctr_temp) {
880
-		ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_SHLW_S0IX_REG,
841
+		struct telemetry_plt_config *plt_config = telemetry_get_pltdata();
842
+		struct intel_pmc_dev *pmc = plt_config->pmc;
843
+
844
+		ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_SHLW_S0IX_REG,
881845 					  &suspend_shlw_res_exit);
882846 		if (ret < 0)
883847 			goto out;
884848 
885
-		ret = intel_pmc_gcr_read64(PMC_GCR_TELEM_DEEP_S0IX_REG,
849
+		ret = intel_pmc_gcr_read64(pmc, PMC_GCR_TELEM_DEEP_S0IX_REG,
886850 					  &suspend_deep_res_exit);
887851 		if (ret < 0)
888852 			goto out;
....@@ -941,7 +905,7 @@
941905 {
942906 	const struct x86_cpu_id *id;
943907 	int err;
944
-	struct dentry *f;
908
+	struct dentry *dir;
945909 
946910 	/* Only APL supported for now */
947911 	id = x86_match_cpu(telemetry_debugfs_cpu_ids);
....@@ -950,8 +914,7 @@
950914 
951915 	debugfs_conf = (struct telemetry_debugfs_conf *)id->driver_data;
952916 
953
-	err = telemetry_pltconfig_valid();
954
-	if (err < 0) {
917
+	if (!telemetry_get_pltdata()) {
955918 		pr_info("Invalid pltconfig, ensure IPC1 device is enabled in BIOS\n");
956919 		return -ENODEV;
957920 	}
....@@ -964,68 +927,22 @@
964927 
965928 	register_pm_notifier(&pm_notifier);
966929 
967
-	err = -ENOMEM;
968
-	debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
969
-	if (!debugfs_conf->telemetry_dbg_dir)
970
-		goto out_pm;
930
+	dir = debugfs_create_dir("telemetry", NULL);
931
+	debugfs_conf->telemetry_dbg_dir = dir;
971932 
972
-	f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
973
-				debugfs_conf->telemetry_dbg_dir, NULL,
974
-				&telem_pss_ops);
975
-	if (!f) {
976
-		pr_err("pss_sample_info debugfs register failed\n");
977
-		goto out;
978
-	}
979
-
980
-	f = debugfs_create_file("ioss_info", S_IFREG | S_IRUGO,
981
-				debugfs_conf->telemetry_dbg_dir, NULL,
982
-				&telem_ioss_ops);
983
-	if (!f) {
984
-		pr_err("ioss_sample_info debugfs register failed\n");
985
-		goto out;
986
-	}
987
-
988
-	f = debugfs_create_file("soc_states", S_IFREG | S_IRUGO,
989
-				debugfs_conf->telemetry_dbg_dir,
990
-				NULL, &telem_socstate_ops);
991
-	if (!f) {
992
-		pr_err("ioss_sample_info debugfs register failed\n");
993
-		goto out;
994
-	}
995
-
996
-	f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO,
997
-				debugfs_conf->telemetry_dbg_dir,
998
-				NULL, &telem_s0ix_fops);
999
-	if (!f) {
1000
-		pr_err("s0ix_residency_usec debugfs register failed\n");
1001
-		goto out;
1002
-	}
1003
-
1004
-	f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO,
1005
-				debugfs_conf->telemetry_dbg_dir, NULL,
1006
-				&telem_pss_trc_verb_ops);
1007
-	if (!f) {
1008
-		pr_err("pss_trace_verbosity debugfs register failed\n");
1009
-		goto out;
1010
-	}
1011
-
1012
-	f = debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO,
1013
-				debugfs_conf->telemetry_dbg_dir, NULL,
1014
-				&telem_ioss_trc_verb_ops);
1015
-	if (!f) {
1016
-		pr_err("ioss_trace_verbosity debugfs register failed\n");
1017
-		goto out;
1018
-	}
1019
-
933
+	debugfs_create_file("pss_info", S_IFREG | S_IRUGO, dir, NULL,
934
+			    &telem_pss_states_fops);
935
+	debugfs_create_file("ioss_info", S_IFREG | S_IRUGO, dir, NULL,
936
+			    &telem_ioss_states_fops);
937
+	debugfs_create_file("soc_states", S_IFREG | S_IRUGO, dir, NULL,
938
+			    &telem_soc_states_fops);
939
+	debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO, dir, NULL,
940
+			    &telem_s0ix_fops);
941
+	debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO, dir, NULL,
942
+			    &telem_pss_trc_verb_ops);
943
+	debugfs_create_file("ioss_trace_verbosity", S_IFREG | S_IRUGO, dir,
944
+			    NULL, &telem_ioss_trc_verb_ops);
1020945 	return 0;
1021
-
1022
-out:
1023
-	debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
1024
-	debugfs_conf->telemetry_dbg_dir = NULL;
1025
-out_pm:
1026
-	unregister_pm_notifier(&pm_notifier);
1027
-
1028
-	return err;
1029946 }
1030947 
1031948 static void __exit telemetry_debugfs_exit(void)
....@@ -1041,4 +958,4 @@
1041958 MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1042959 MODULE_DESCRIPTION("Intel SoC Telemetry debugfs Interface");
1043960 MODULE_VERSION(DRIVER_VERSION);
1044
-MODULE_LICENSE("GPL");
961
+MODULE_LICENSE("GPL v2");