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Nguyen" Subject: [PATCH v7 4/9] docs: misc-devices: (smpro-errmon) Add documentation Date: Mon, 21 Mar 2022 15:13:50 +0700 Message-Id: <20220321081355.6802-5-quan@os.amperecomputing.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220321081355.6802-1-quan@os.amperecomputing.com> References: <20220321081355.6802-1-quan@os.amperecomputing.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SGXP274CA0010.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b8::22) To SJ0PR01MB7282.prod.exchangelabs.com (2603:10b6:a03:3f2::24) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: aa89d775-2557-4b14-93f6-08da0b12e138 X-MS-TrafficTypeDiagnostic: BN6PR01MB2738:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: trc2GXABXiBI6judzF4eNXwXfD+Lx5uZWfYVjEJkYyRO7HJFy6hWIFeuk9RN0+vlMvVGGDgoCacafDM3/N5bLo5VGzau8JlF70bll2jtUSwJaA9isvLCSvwtT5VBqRugR53TLoUIq2thrTifwK1aXUILFQs984hHqLgdqL0QA9QCNllf632XWoHzqs3+mGw4bK7gLWlxQp93W/JfXNeEoMAw7Ds9/s9xHxbYQS0qmozQP/DHH+m0hDE/X2yQQyJTUvdopuVkR8YtXip7cnesyp5dHCx8Ceq4dhSN29WpC5JPmfWRih4ogw5Ik3VBE3xd5/As0IF3aQt09HD4+IRmNJn73x04NSWdEv3GjrJCUXvFKl+pUgE6L3mKXrLX+OwXeDzSyzUCgnlzd97qnts7Pb81YSCTK5BDZQOMn5ZhC1QQ6b3FBbJdu20zqHkPKidwbs6FzyFqDvPg7Qi72e4umvo9XZmRosaJuC/TB3FgmbRchuzRT+Ch52F/z00eVviTmCcZRXnm2pz/BKBVBRV6NsuuVRqHl4C7xJkjbhCCdb7qyjY/2OyO8Bt8ZyVfl60FZhKF1+yrvDIVZ4RqDV0gHyNwPL3AjNIOa3hzcYKi7Ywi8ZWgO2bEmc1OFXaeHJmly0dm/TyC6iHkys2I9BYW+r9nZNbNQwixmKAyrvpzu0t725q/SqUh4/0Rnsyh3rGBu0HzqivpHKt7G4BXAJa/15KJEBDg99kq0N/qo22Pffo= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ0PR01MB7282.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(13230001)(4636009)(366004)(38100700002)(66476007)(66556008)(6512007)(66946007)(7416002)(107886003)(186003)(1076003)(86362001)(38350700002)(4326008)(5660300002)(8676002)(26005)(316002)(52116002)(110136005)(921005)(54906003)(2616005)(2906002)(508600001)(8936002)(6486002)(6506007)(6666004)(83380400001);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?VGrlRWSPhOkC4GxZK+GKdndivTU9aI3FlIepDQqGyqvCzXcJKrzO1D8fq/p0?= =?us-ascii?Q?m+VS2xiAtXS4bodFyk/sh1F7ROBsyZlPcaFhy5TPq/Lg+ftUsH63ZrTrQLXa?= =?us-ascii?Q?x88SvDX1JXun9VsOWJm7uQnIwnulUMIjlizl1wCFjMQ6kGyzMOSPA8MmvM1g?= =?us-ascii?Q?ZPMvkFYiiP/gDnu3mYlZQBmrJmqvPEEq0RHS/mvjOEUoWFk6a47TISiC9tVy?= =?us-ascii?Q?2iiF2/3ajMLNbx70WJLLzXqDVHbyGqEg1BXzCZkkZeOuFFom6TQ52CtBsofS?= =?us-ascii?Q?i74uc5SF3bSXRAnOQJunNLGVAxKkwJ/jVAetNG0axqw1sjzAVkVQvCUkP6IH?= =?us-ascii?Q?6HSS83Ji8Z3hAQDy1lcGRow28Z+gUEyJT3/0fd+j5EvDWe86yk9fijcEEgM6?= =?us-ascii?Q?/gnO37u/It1/LFo1wx1wgWcrLsKonQSk/zfbqP3FbEz+key/LMA7bsJnOfH7?= =?us-ascii?Q?YycCz9iu3jPLxbgzcmHErvIL4mxkjE8yuSEo5w3+FrLOWQ4grZ3kyyLCl5iT?= =?us-ascii?Q?1mBaItpPQHFWR1OaENBcyoJej66+JnOB+rwTnogurk+8YLGL3Qa3POMK5uwP?= =?us-ascii?Q?Fk5K/nIBuxsm+o3f/eOamvCnDaQpFM7WYlopGUAwSyQPjRFJ+ns6g4eUf1Th?= =?us-ascii?Q?lhDfGzE3mUlQSeo3JMPT4doW7hFmWEFj+N5hGU/dn0lWV0Ds1VWWZtNHKW76?= =?us-ascii?Q?bLyXBEl5Jx8BANrdxmX0NCy0cAh7385BVycFfJLIStmBpytLSUmLwOZYCAf+?= =?us-ascii?Q?39kc4khj90c23yn78rwWk1GzN+7rIybdeABUBdEgObTDtU7wi6O2ArYqaqD9?= =?us-ascii?Q?M1RioTm86nv7VnZj3gBDCern6NOcc6mnJrdgqN+6HkbZK+s7lUqq9MCFA1m/?= =?us-ascii?Q?s/oZ8z6XPpZmV7SvWLfU6Jnk9hqfWWfVQDpbEDyzFwbHs/iNHt+9ycZeQYaf?= =?us-ascii?Q?0kmOZ54ILLeyVk0tNNWvHDUqpBkq7DJOi/7ldDzlHULYEP88seGyRbu/ReV3?= =?us-ascii?Q?jkueBD3zM03PxwPRu82Xjc+TGTNNNiiVu9OvkrM/YtQlTBX8MTr3ILIUD4wU?= =?us-ascii?Q?LwtycdESw8lSSMiQt3gl5O+sYEH67f9hDTB2TUIFBsp0S2TvE7NlWby8XKbH?= =?us-ascii?Q?XZYt51RXnr5SlhciU/g0JkmizvLObAXhAWzk/g8iLEH/nociyjYfrHSMy2yp?= =?us-ascii?Q?kS7+kg7a12BUVQYJj8nj6N2OIf5m7YnWDZ2kzG4Henp+sWcfCeyhJ0sCm86j?= =?us-ascii?Q?Y4KjN+EJPUMICKSy92i4sF94pqZNZTUJGgfUOs189IhbgUXhhCgsGcvXCU5L?= =?us-ascii?Q?WUibzYvAXAHPnSk5ueYndjn0qKr+DejUiooEW9Phj8MNjvk4yCkUKVrQ5ZXc?= =?us-ascii?Q?eOS53Txb4dKpRpOIKi6S1FzVR2iAEJrjV/2iUkCPrTCA276Gpvmq2G28Mr9i?= =?us-ascii?Q?DBLzhTmhNONNJvU4Vg5leTj9XiNabLkhCGobKNiOCNWrNG9+lI2+eEPdky5t?= =?us-ascii?Q?GbPKnmi1WqsJqsI=3D?= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: aa89d775-2557-4b14-93f6-08da0b12e138 X-MS-Exchange-CrossTenant-AuthSource: SJ0PR01MB7282.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Mar 2022 08:14:54.5838 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: WTX2I7wNKUmyMPsqrGyjsX0demmwkTDniZaD0A+BYmfWDrwec55xb2KgbybmV2X+yw2FUJRgebQWKi9cBo1XLq3HlD2HqW5+tQc/kz6N9W4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR01MB2738 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adds documentation for Ampere(R)'s Altra(R) SMpro errmon driver. Signed-off-by: Thu Nguyen Signed-off-by: Quan Nguyen --- Changes in v7: + None Changes in v6: + First introduced in v6 [Quan] Documentation/misc-devices/index.rst | 1 + Documentation/misc-devices/smpro-errmon.rst | 206 ++++++++++++++++++++ 2 files changed, 207 insertions(+) create mode 100644 Documentation/misc-devices/smpro-errmon.rst diff --git a/Documentation/misc-devices/index.rst b/Documentation/misc-devices/index.rst index 30ac58f81901..7a6a6263cbab 100644 --- a/Documentation/misc-devices/index.rst +++ b/Documentation/misc-devices/index.rst @@ -26,6 +26,7 @@ fit into other categories. lis3lv02d max6875 pci-endpoint-test + smpro-errmon spear-pcie-gadget uacce xilinx_sdfec diff --git a/Documentation/misc-devices/smpro-errmon.rst b/Documentation/misc-devices/smpro-errmon.rst new file mode 100644 index 000000000000..e05d19412c07 --- /dev/null +++ b/Documentation/misc-devices/smpro-errmon.rst @@ -0,0 +1,206 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver Ampere(R)'s Altra(R) SMpro errmon +=============================================== + +Supported chips: + + * Ampere(R) Altra(R) + + Prefix: 'smpro' + + Preference: Altra SoC BMC Interface Specification + +Author: Thu Nguyen + +Description +----------- + +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the +SMpro co-processor (SMpro). +The following SoC alert/event types are supported by the errmon driver: + +* Core CE/UE errors +* Memory CE/UE errors +* PCIe CE/UE errors +* Other CE/UE errors +* Internal SMpro/PMpro errors +* VRD hot +* VRD warn/fault +* DIMM Hot +* DIMM 2x refresh rate + +The SMpro interface provides the registers to query the status of the SoC alerts/events +and their data and export to userspace by this driver. + +Usage Notes +----------- + +SMpro errmon driver creates the sysfs files for each host alert/event type. +Example: ``errors_core_ce`` to get Core CE error type. + +To get a host alert/event type, the user will read the corresponding sysfs file. + +* If the alert/event is absented, the sysfs file returns empty. +* If the alerts/events are presented, the existing alerts/events will be reported as the error lines. + +The format of the error lines is defended on the alert/event type. + +1) Type 1 for Core/Memory/PCIe/Other CE/UE alert types:: + + + + Where: + * Error Type: The hardwares cause the errors in format of two hex characters. + * SubType: Sub type of error in the specified hardware error in format of two hex characters. + * Instance: Combination of the socket, channel, slot cause the error in format of four hex characters. + * Error Status: Encode of error status in format of eight hex characters. + * Error Address: The address in device causes the errors in format of sixteen hex characters. + * Error Misc 0/1/2/3: Addition info about the errors. Each field is in format of sixteen hex characters. + + Example: + # cat errors_other_ce + 0a 02 0000 000030e4 0000000000000080 0000020000000000 0000000000000000 0000000000000000 0000000000000000 + 0a 01 0000 000030e4 0000000000000080 0000020000000000 0000000000000000 0000000000000000 0000000000000000 + + The size of the alert buffer for this error type is 8 alerts. + When the buffer is overflowed, the errmon driver will be added the overflowed alert line to sysfs output. + + ff ff 0000 00000000 0000000000000080 0000000000000000 0000000000000000 0000000000000000 0000000000000000 + +Below table defines the value of Error types, Sub Types, Sub component and instance: + + ============ ========== ========= =============== ================ + Error Group Error Type Sub type Sub component Instance + CPM 0 0 Snoop-Logic CPM # + CPM 0 2 Armv8 Core 1 CPM # + MCU 1 1 ERR1 MCU # | SLOT << 11 + MCU 1 2 ERR2 MCU # | SLOT << 11 + MCU 1 3 ERR3 MCU # + MCU 1 4 ERR4 MCU # + MCU 1 5 ERR5 MCU # + MCU 1 6 ERR6 MCU # + MCU 1 7 Link Error MCU # + Mesh 2 0 Cross Point X | (Y << 5) | NS <<11 + Mesh 2 1 Home Node(IO) X | (Y << 5) | NS <<11 + Mesh 2 2 Home Node(Mem) X | (Y << 5) | NS <<11 | device<<12 + Mesh 2 4 CCIX Node X | (Y << 5) | NS <<11 + 2P Link 3 0 N/A Altra 2P Link # + GIC 5 0 ERR0 0 + GIC 5 1 ERR1 0 + GIC 5 2 ERR2 0 + GIC 5 3 ERR3 0 + GIC 5 4 ERR4 0 + GIC 5 5 ERR5 0 + GIC 5 6 ERR6 0 + GIC 5 7 ERR7 0 + GIC 5 8 ERR8 0 + GIC 5 9 ERR9 0 + GIC 5 10 ERR10 0 + GIC 5 11 ERR11 0 + GIC 5 12 ERR12 0 + GIC 5 13-21 ERR13 RC# + 1 + SMMU 6 TCU 100 RC # + SMMU 6 TBU0 0 RC # + SMMU 6 TBU1 1 RC # + SMMU 6 TBU2 2 RC # + SMMU 6 TBU3 3 RC # + SMMU 6 TBU4 4 RC # + SMMU 6 TBU5 5 RC # + SMMU 6 TBU6 6 RC # + SMMU 6 TBU7 7 RC # + SMMU 6 TBU8 8 RC # + SMMU 6 TBU9 9 RC # + PCIe AER 7 Root 0 RC # + PCIe AER 7 Device 1 RC # + PCIe RC 8 RCA HB 0 RC # + PCIe RC 8 RCB HB 1 RC # + PCIe RC 8 RASDP 8 RC # + OCM 9 ERR0 0 0 + OCM 9 ERR1 1 0 + OCM 9 ERR2 2 0 + SMpro 10 ERR0 0 0 + SMpro 10 ERR1 1 0 + SMpro 10 MPA_ERR 2 0 + PMpro 11 ERR0 0 0 + PMpro 11 ERR1 1 0 + PMpro 11 MPA_ERR 2 0 + ============= ========== ========= =============== ================ + + +2) Type 2 for the Internal SMpro/PMpro alert types:: + + + + Where: + * Error Type: SMpro/PMpro Error types in format of two hex characters. + + 1: Warning + + 2: Error + + 4: Error with data + * Error SubType: SMpro/PMpro Image Code in format of two hex characters. + * Direction: Direction in format of two hex characters. + + 0: Enter + + 1: Exit + * Error Location: SMpro/PMpro Module Location code in format of two hex characters. + * Error Code: SMpro/PMpro Error code in format of four hex characters. + * Error Data: Extensive datae in format of eight hex characters. + All bits are 0 when Error Type is warning or error. + + Example: + # cat errors_smpro + 01 04 01 08 0035 00000000 + +3) Type 3 for the VRD hot, VRD /warn/fault, DIMM Hot, DIMM 2x refresh rate event:: + + [Event Data] + + Where: + * Event Type: event type in format of two hex characters. + * Event SubType: event sub type in format of two hex characters. + * Direction: Direction in format of two hex characters. + + 0: Asserted + + 1: De-asserted + * Event Location: The index of component cause the alert in format of two hex characters. + * Event Data: Extensive data if have in format of four hex characters. + + Example: + #cat event_vr_hot + 00 02 00 00 -> /* DIMM VRD hot event is asserted at channel 0 */ + 00 02 01 00 -> /* DIMM VRD hot event is de-asserted at channel 0 */ + 00 01 00 03 -> /* Core VRD hot event is asserted at channel 3 */ + 00 00 00 00 -> /* SoC VRD hot event is asserted */ + 00 00 00 00 -> /* SoC VRD hot event is de-asserted */ + 00 02 00 06 -> /* DIMM VRD hot event is de-asserted at channel 6 */ + +Sysfs entries +------------- + +The following sysfs files are supported: + +* Ampere(R) Altra(R): + +Alert Types: + + ================= =============== =========================================================== ======= + Alert Type Sysfs name Description Format + Core CE Errors errors_core_ce Triggered by CPU when Core has an CE error 1 + Core UE Errors errors_core_ue Triggered by CPU when Core has an UE error 1 + Memory CE Errors errors_mem_ce Triggered by CPU when Memory has an CE error 1 + Memory UE Errors errors_mem_ue Triggered by CPU when Memory has an UE error 1 + PCIe CE Errors errors_pcie_ce Triggered by CPU when any PCIe controller has any CE error 1 + PCIe UE Errors errors_pcie_ue Triggered by CPU when any PCIe controller has any UE error 1 + Other CE Errors errors_other_ce Triggered by CPU when any Others CE error 1 + Other UE Errors errors_other_ue Triggered by CPU when any Others UE error 1 + SMpro Errors errors_smpro Triggered by CPU when system have SMpro error 2 + PMpro Errors errors_pmpro Triggered by CPU when system have PMpro error 2 + ================= =============== =========================================================== ======= + +Event Type: + + ============================ ========================== =========== ======================== + Event Type Sysfs name Event Type Sub Type + VRD HOT event_vrd_hot 0 0: SoC, 1: Core, 2: DIMM + VR Warn/Fault event_vrd_warn_fault 1 0: SoC, 1: Core, 2: DIMM + DIMM Hot event_dimm_hot 2 NA (Default 0) + DIMM 2x refresh rate status event_dimm_2x_refresh 3 NA (Default 0) + ============================ ========================== =========== ======================== -- 2.35.1