[PATCH 07/15] platform/x86/intel/vsec: Add new Discovery feature

[David E. Box]

Add the PCIe VSEC ID for new Intel Platform Monitoring Technology
Capability Discovery feature. Discovery provides detailed information for
the various Intel VSEC features. Also make the driver a supplier for
TPMI and Telemetry drivers which will use the information.

Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx>
---
 drivers/platform/x86/intel/vsec.c | 26 ++++++++++++++++++++++++--
 include/linux/intel_vsec.h        |  4 +++-
 2 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index 5374abef0b48..e3ec17a53e62 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -65,6 +65,9 @@ static const char *intel_vsec_name(enum intel_vsec_id id)
 	case VSEC_ID_TPMI:
 		return "tpmi";
 
+	case VSEC_ID_DISCOVERY:
+		return "discovery";
+
 	default:
 		return NULL;
 	}
@@ -83,6 +86,8 @@ static bool intel_vsec_supported(u16 id, unsigned long caps)
 		return !!(caps & VSEC_CAP_SDSI);
 	case VSEC_ID_TPMI:
 		return !!(caps & VSEC_CAP_TPMI);
+	case VSEC_ID_DISCOVERY:
+		return !!(caps & VSEC_CAP_DISCOVERY);
 	default:
 		return false;
 	}
@@ -140,6 +145,8 @@ static bool vsec_driver_present(int cap_id)
 		return IS_ENABLED(CONFIG_INTEL_SDSI);
 	case VSEC_CAP_TPMI:
 		return IS_ENABLED(CONFIG_INTEL_TPMI);
+	case VSEC_CAP_DISCOVERY:
+		return IS_ENABLED(CONFIG_INTEL_PMT_DISCOVERY);
 	default:
 		return false;
 	}
@@ -392,6 +399,9 @@ static int get_cap_id(u32 header_id, unsigned long *cap_id)
 	case VSEC_ID_TPMI:
 		*cap_id = ilog2(VSEC_CAP_TPMI);
 		break;
+	case VSEC_ID_DISCOVERY:
+		*cap_id = ilog2(VSEC_CAP_DISCOVERY);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -677,14 +687,26 @@ static const struct intel_vsec_platform_info mtl_info = {
 	.caps = VSEC_CAP_TELEMETRY,
 };
 
+static const struct vsec_feature_dependency oobmsm_deps[] = {
+	{
+		.feature = VSEC_CAP_TELEMETRY,
+		.supplier_bitmap = VSEC_CAP_DISCOVERY
+	},
+};
+
 /* OOBMSM info */
 static const struct intel_vsec_platform_info oobmsm_info = {
-	.caps = VSEC_CAP_TELEMETRY | VSEC_CAP_SDSI | VSEC_CAP_TPMI,
+	.caps = VSEC_CAP_TELEMETRY | VSEC_CAP_SDSI | VSEC_CAP_TPMI |
+		VSEC_CAP_DISCOVERY,
+	.deps = oobmsm_deps,
+	.num_deps = ARRAY_SIZE(oobmsm_deps),
 };
 
 /* DMR OOBMSM info */
 static const struct intel_vsec_platform_info dmr_oobmsm_info = {
-	.caps = VSEC_CAP_TELEMETRY | VSEC_CAP_TPMI,
+	.caps = VSEC_CAP_TELEMETRY | VSEC_CAP_TPMI | VSEC_CAP_DISCOVERY,
+	.deps = oobmsm_deps,
+	.num_deps = ARRAY_SIZE(oobmsm_deps),
 };
 
 /* TGL info */
diff --git a/include/linux/intel_vsec.h b/include/linux/intel_vsec.h
index 71067afaca99..a07796d7d43b 100644
--- a/include/linux/intel_vsec.h
+++ b/include/linux/intel_vsec.h
@@ -16,7 +16,8 @@
 #define VSEC_CAP_CRASHLOG	BIT(3)
 #define VSEC_CAP_SDSI		BIT(4)
 #define VSEC_CAP_TPMI		BIT(5)
-#define VSEC_FEATURE_COUNT	6
+#define VSEC_CAP_DISCOVERY	BIT(6)
+#define VSEC_FEATURE_COUNT	7
 
 /* Intel DVSEC offsets */
 #define INTEL_DVSEC_ENTRIES		0xA
@@ -33,6 +34,7 @@ enum intel_vsec_id {
 	VSEC_ID_TELEMETRY	= 2,
 	VSEC_ID_WATCHER		= 3,
 	VSEC_ID_CRASHLOG	= 4,
+	VSEC_ID_DISCOVERY	= 12,
 	VSEC_ID_SDSI		= 65,
 	VSEC_ID_TPMI		= 66,
 };
-- 
2.43.0