platform/x86/intel/pmc: Enable Pkgc blocking residency counter

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>
Link: https://patch.msgid.link/20260505043342.2573556-4-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 7681c444f4bdfe34ffb5f1bb5de2e7271525de18..94ae098a155a692e448ba06bcd3c766989062989 100644 (file)
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -1099,6 +1099,16 @@ 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;
+
+       return pmc_core_pkgc_counters_show(s, pmcdev->pc_ep,
+                                          pmcdev->pkgc_blocker_offset,
+                                          pmcdev->pkgc_blocker_counters);
+}
+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;
@@ -1386,6 +1396,8 @@ 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;
        }
 }
 
@@ -1515,6 +1527,9 @@ 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 a20aab73c14094441ab24f0170490afe21e40550..829b1dee3f63693f9b87ab2b0bd61a51c1535ede 100644 (file)
--- 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);