[PATCH V4 17/17] platform/x86/intel/pmc: Show Die C6 counter on Meteor Lake

David E. Box
2023-10-18T23:17:29Z

Expose the Die C6 counter on Meteor Lake.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
---
V4 - no change

V3 - Split PATCH V2 13. Separates implementation (previous patch)
from platform specific use (this patch)

drivers/platform/x86/intel/pmc/mtl.c | 32 ++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)

diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
index 7ceeae507f4c..38c2f946ec23 100644
--- 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.
--
2.34.1