platform/x86/intel/pmc: Show Die C6 counter on Meteor Lake

Expose the Die C6 counter on Meteor Lake.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231129222132.2331261-21-david.e.box@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
index 7ceeae507f4ccd92d5919ce66c1dc70e48164239..38c2f946ec231f7375ac5755a813ff3d84effa2b 100644 (file)
--- a/drivers/platform/x86/intel/pmc/mtl.c
+++ b/drivers/platform/x86/intel/pmc/mtl.c
@@ -10,12 +10,17 @@
 
 #include <linux/pci.h>
 #include "core.h"
+#include "../pmt/telemetry.h"
 
 /* PMC SSRAM PMT Telemetry GUIDS */
 #define SOCP_LPM_REQ_GUID      0x2625030
 #define IOEM_LPM_REQ_GUID      0x4357464
 #define IOEP_LPM_REQ_GUID      0x5077612
 
+/* Die C6 from PUNIT telemetry */
+#define MTL_PMT_DMU_DIE_C6_OFFSET      15
+#define MTL_PMT_DMU_GUID               0x1A067102
+
 static const u8 MTL_LPM_REG_INDEX[] = {0, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20};
 
 /*
@@ -968,6 +973,32 @@ static struct pmc_info mtl_pmc_info_list[] = {
        {}
 };
 
+static void mtl_punit_pmt_init(struct pmc_dev *pmcdev)
+{
+       struct telem_endpoint *ep;
+       struct pci_dev *pcidev;
+
+       pcidev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(10, 0));
+       if (!pcidev) {
+               dev_err(&pmcdev->pdev->dev, "PUNIT PMT device not found.\n");
+               return;
+       }
+
+       ep = pmt_telem_find_and_register_endpoint(pcidev, MTL_PMT_DMU_GUID, 0);
+       if (IS_ERR(ep)) {
+               dev_err(&pmcdev->pdev->dev,
+                       "pmc_core: couldn't get DMU telem endpoint, %ld\n",
+                       PTR_ERR(ep));
+               return;
+       }
+
+       pci_dev_put(pcidev);
+       pmcdev->punit_ep = ep;
+
+       pmcdev->has_die_c6 = true;
+       pmcdev->die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET;
+}
+
 #define MTL_GNA_PCI_DEV        0x7e4c
 #define MTL_IPU_PCI_DEV        0x7d19
 #define MTL_VPU_PCI_DEV        0x7d1d
@@ -1032,6 +1063,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
        }
 
        pmc_core_get_low_power_modes(pmcdev);
+       mtl_punit_pmt_init(pmcdev);
 
        /* Due to a hardware limitation, the GBE LTR blocks PC10
         * when a cable is attached. Tell the PMC to ignore it.