linux-kernel - [PATCH 1/6] platform/x86/intel/tpmi: Add additional TPMI header fields

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Message-Id: <20231128185605.3027653-2-srinivas.pandruvada@linux.intel.com>
Date:   Tue, 28 Nov 2023 10:56:00 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     hdegoede@...hat.com, markgross@...nel.org,
        ilpo.jarvinen@...ux.intel.com, andriy.shevchenko@...ux.intel.com
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 1/6] platform/x86/intel/tpmi: Add additional TPMI header fields

TPMI information header added additional fields in version 2. Some of the
reserved fields in version 1 are used to define new fields.
Parse new fields and export as part of platform data. These fields include:
- PCI segment ID
- Partition ID of the package, useful when more than one Intel VSEC PCI
device per package
- cdie_mask: Mask of all compute dies in this partition

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
 drivers/platform/x86/intel/tpmi.c | 11 ++++++++++-
 include/linux/intel_tpmi.h        |  6 ++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/tpmi.c b/drivers/platform/x86/intel/tpmi.c
index 311abcac894a..c89aa4d14bea 100644
--- a/drivers/platform/x86/intel/tpmi.c
+++ b/drivers/platform/x86/intel/tpmi.c
@@ -128,6 +128,9 @@ struct intel_tpmi_info {
  * @dev:	PCI device number
  * @bus:	PCI bus number
  * @pkg:	CPU Package id
+ * @segment: PCI segment id
+ * @partition: Package Partition id
+ * @cdie_mask: Bitmap of compute dies in the current partition
  * @reserved:	Reserved for future use
  * @lock:	When set to 1 the register is locked and becomes read-only
  *		until next reset. Not for use by the OS driver.
@@ -139,7 +142,10 @@ struct tpmi_info_header {
 	u64 dev:5;
 	u64 bus:8;
 	u64 pkg:8;
-	u64 reserved:39;
+	u64 segment:8;
+	u64 partition:2;
+	u64 cdie_mask:16;
+	u64 reserved:13;
 	u64 lock:1;
 } __packed;
 
@@ -684,6 +690,9 @@ static int tpmi_process_info(struct intel_tpmi_info *tpmi_info,
 	tpmi_info->plat_info.bus_number = header.bus;
 	tpmi_info->plat_info.device_number = header.dev;
 	tpmi_info->plat_info.function_number = header.fn;
+	tpmi_info->plat_info.cdie_mask = header.cdie_mask;
+	tpmi_info->plat_info.partition = header.partition;
+	tpmi_info->plat_info.segment = header.segment;
 
 	iounmap(info_mem);
 
diff --git a/include/linux/intel_tpmi.h b/include/linux/intel_tpmi.h
index ee07393445f9..939663bb095f 100644
--- a/include/linux/intel_tpmi.h
+++ b/include/linux/intel_tpmi.h
@@ -14,7 +14,10 @@
 
 /**
  * struct intel_tpmi_plat_info - Platform information for a TPMI device instance
+ * @cdie_mask:	Mask of all compute dies in the partition
  * @package_id:	CPU Package id
+ * @partition:  Package partition id when multiple VSEC PCI devices per package
+ * @segment: PCI segment ID
  * @bus_number:	PCI bus number
  * @device_number: PCI device number
  * @function_number: PCI function number
@@ -23,7 +26,10 @@
  * struct is used to return data via tpmi_get_platform_data().
  */
 struct intel_tpmi_plat_info {
+	u16 cdie_mask;
 	u8 package_id;
+	u8 partition;
+	u8 segment;
 	u8 bus_number;
 	u8 device_number;
 	u8 function_number;
-- 
2.41.0