[PATCH 2/6] platform/x86/intel/pmc: Enable Pkgc blocking residency counter

[Xi Pardee <xi.pardee@linux.intel.com>]

Enable the Package C-state blocking counter in the PMT telemetry
region. This counter reports the number of 10 µs intervals during
which a Package C-state 10.2/3 entry was blocked for the specified
reasons.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/core.c | 27 +++++++++++++++++++++++++++
 drivers/platform/x86/intel/pmc/core.h |  8 ++++++++
 2 files changed, 35 insertions(+)

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index bf95a1f2ba428..e5b48a68cf495 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -1093,6 +1093,28 @@ static int pmc_core_pkgc_ltr_blocker_show(struct seq_file *s, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(pmc_core_pkgc_ltr_blocker);
 
+static int pmc_core_pkgc_blocker_residency_show(struct seq_file *s, void *unused)
+{
+	struct pmc_dev *pmcdev = s->private;
+	const char **pkgc_blocker_counters;
+	u32 counter, offset;
+	unsigned int i;
+	int ret;
+
+	offset = pmcdev->pkgc_blocker_offset;
+	pkgc_blocker_counters = pmcdev->pkgc_blocker_counters;
+	for (i = 0; pkgc_blocker_counters[i]; i++, offset++) {
+		ret = pmt_telem_read32(pmcdev->pc_ep, offset,
+				       &counter, 1);
+		if (ret)
+			return ret;
+		seq_printf(s, "%-30s %-30u\n", pkgc_blocker_counters[i], counter);
+	}
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(pmc_core_pkgc_blocker_residency);
+
 static int pmc_core_lpm_latch_mode_show(struct seq_file *s, void *unused)
 {
 	struct pmc_dev *pmcdev = s->private;
@@ -1380,6 +1402,8 @@ void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_de
 		pmcdev->pc_ep = ep;
 		pmcdev->pkgc_ltr_blocker_counters = pmc_dev_info->pkgc_ltr_blocker_counters;
 		pmcdev->pkgc_ltr_blocker_offset = pmc_dev_info->pkgc_ltr_blocker_offset;
+		pmcdev->pkgc_blocker_counters = pmc_dev_info->pkgc_blocker_counters;
+		pmcdev->pkgc_blocker_offset = pmc_dev_info->pkgc_blocker_offset;
 	}
 
 release_dev:
@@ -1512,6 +1536,9 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev, struct pmc_dev_info
 		debugfs_create_file("pkgc_ltr_blocker_show", 0444,
 				    pmcdev->dbgfs_dir, pmcdev,
 				    &pmc_core_pkgc_ltr_blocker_fops);
+		debugfs_create_file("pkgc_blocker_residency_show", 0444,
+				    pmcdev->dbgfs_dir, pmcdev,
+				    &pmc_core_pkgc_blocker_residency_fops);
 	}
 
 }
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index a20aab73c1409..829b1dee3f636 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -455,6 +455,8 @@ struct pmc {
  *
  * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters
  * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region
+ * @pkgc_blocker_counters: Array of PKGC blocker counters
+ * @pkgc_blocker_offset: Offset to PKGC blocker in telemetry region
  *
  * pmc_dev contains info about power management controller device.
  */
@@ -480,6 +482,8 @@ struct pmc_dev {
 
 	const char **pkgc_ltr_blocker_counters;
 	u32 pkgc_ltr_blocker_offset;
+	const char **pkgc_blocker_counters;
+	u32 pkgc_blocker_offset;
 };
 
 enum pmc_index {
@@ -495,6 +499,7 @@ enum pmc_index {
  * @dmu_guids:		List of Die Management Unit GUID
  * @pc_guid:		GUID for telemetry region to read PKGC blocker info
  * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region
+ * @pkgc_blocker_offset:Offset to PKGC blocker in telemetry region
  * @regmap_list:	Pointer to a list of pmc_info structure that could be
  *			available for the platform. When set, this field implies
  *			SSRAM support.
@@ -502,6 +507,7 @@ enum pmc_index {
  *			specific attributes of the primary PMC
  * @sub_req_show:	File operations to show substate requirements
  * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters
+ * @pkgc_blocker_counters: Array of PKGC blocker counters
  * @suspend:		Function to perform platform specific suspend
  * @resume:		Function to perform platform specific resume
  * @init:		Function to perform platform specific init action
@@ -512,10 +518,12 @@ struct pmc_dev_info {
 	u32 *dmu_guids;
 	u32 pc_guid;
 	u32 pkgc_ltr_blocker_offset;
+	u32 pkgc_blocker_offset;
 	struct pmc_info *regmap_list;
 	const struct pmc_reg_map *map;
 	const struct file_operations *sub_req_show;
 	const char **pkgc_ltr_blocker_counters;
+	const char **pkgc_blocker_counters;
 	void (*suspend)(struct pmc_dev *pmcdev);
 	int (*resume)(struct pmc_dev *pmcdev);
 	int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info);
-- 
2.43.0