[Skiboot] [PATCH v6 1/9] nest data structure definitions
Madhavan Srinivasan
maddy at linux.vnet.ibm.com
Fri Feb 19 03:45:09 AEDT 2016
Add the data structures and macros needed for Nest instrumentation
support by creating a new file in include/ called "nest.h".
Signed-off-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>
---
include/nest.h | 214 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 214 insertions(+)
create mode 100644 include/nest.h
diff --git a/include/nest.h b/include/nest.h
new file mode 100644
index 000000000000..a27907fdf62a
--- /dev/null
+++ b/include/nest.h
@@ -0,0 +1,214 @@
+/* Copyright 2015 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __NEST_H
+#define __NEST_H
+
+/*
+ * Power8 has Nest Instrumentation support with which per-chip
+ * utilisation metrics like memory bandwidth, Xlink/Alink bandwidth and
+ * many other component metrics can be obtained. These Nest
+ * counters can be programmed via scoms or HW PORE Engine,
+ * called PORE_SLW_IMA.
+ *
+ * PORE_SLW_IMA:
+ * PORE_SLW_IMA is a firmware that runs on PORE Engine.
+ * This firmware programs the nest counter and moves counter values to
+ * per chip HOMER region in a fixed offset for each unit. Engine
+ * has a control block structure for communication with Hyperviosr(Host OS).
+ *
+ * PORE -- Power On Reset Engine
+ * SLW -- Sleep/Winkle
+ * IMA -- In Memory Accumulation.
+ */
+
+/*
+ * Control Block structure offset in HOMER IMA Region
+ */
+#define CB_STRUCT_OFFSET 0x39FC00
+#define CB_STRUCT_CMD 0x39FC08
+#define CB_STRUCT_SPEED 0x39FC10
+#define SLW_IMA_PAUSE 0x2
+#define SLW_IMA_RESUME 0x1
+#define SLW_IMA_NOP 0
+/*
+ * Control Block Structure:
+ *
+ * Name Producer Consumer Values Desc
+ * IMARunStatus IMA Code Hypervisor 0 Initializing
+ * (Host OS) 1 Running
+ * 2 Paused
+ *
+ * IMACommand Hypervisor IMA Code 0 NOP
+ * 1 Resume
+ * 2 Pause
+ * 3 Clear and Restart
+ *
+ * IMACollection Hypervisor IMA Code 0 128us
+ * Speed 1 256us
+ * 2 1ms
+ * 3 4ms
+ * 4 16ms
+ * 5 64ms
+ * 6 256ms
+ * 7 1000ms
+ */
+struct ima_chip_cb
+{
+ u64 ima_chip_run_status;
+ u64 ima_chip_command;
+ u64 ima_chip_collection_speed;
+};
+
+/*
+ * In Memory Accumulation modes
+ */
+#define IMA_CHIP_PRODUCTION_MODE 0x1
+
+/*
+ * PORE_SLW_IMA reserved memory (in HOMER region)
+ */
+#define SLW_IMA_OFFSET 0x00320000
+#define SLW_IMA_TOTAL_SIZE 0x80000
+
+/*
+ * Counter Storage size (exposed as part of DT)
+ */
+#define SLW_IMA_SIZE 0x30000
+
+/*
+ * PTS Scoms and values
+ */
+#define IMA_PTS_SCOM 0x00068009
+#define IMA_PTS_ENABLE 0x00F0000000000000
+#define IMA_PTS_DISABLE 0x00E0000000000000
+#define IMA_PTS_START 0x1
+#define IMA_PTS_STOP 0
+#define IMA_PTS_ERROR -1
+
+/*
+ * Catalog structures.
+ * Catalog is a meta data file provided as part of FW lid.
+ * This file contains information about the various events the
+ * HW supports under the "24x7" umbrella. Events are classified under
+ * 3 different Domains.
+ * Domain 1 -- Chip Events (PORE_SLW_IMA)
+ * Domain 2 -- Core Events (24x7 Core IMA)
+ * Domain 3 -- per-Thread PMU Events
+ */
+
+#define CATALOG_MAGIC 0x32347837 /* "24x7" in ASCII */
+#define DOMAIN_CHIP 1
+#define DOMAIN_CORE 2
+
+struct nest_catalog_page_0 {
+ u32 magic;
+ u32 length; /* In 4096 byte pages */
+ u64 version;
+ u8 build_time_stamp[16]; /* "YYYYMMDDHHMMSS\0\0" */
+ u8 reserved2[32];
+ u16 schema_data_offs; /* in 4096 byte pages */
+ u16 schema_data_len; /* in 4096 byte pages */
+ u16 schema_entry_count;
+ u8 reserved3[2];
+ u16 event_data_offs;
+ u16 event_data_len;
+ u16 event_entry_count;
+ u8 reserved4[2];
+ u16 group_data_offs; /* in 4096 byte pages */
+ u16 group_data_len; /* in 4096 byte pages */
+ u16 group_entry_count;
+ u8 reserved5[2];
+ u16 formula_data_offs; /* in 4096 byte pages */
+ u16 formula_data_len; /* in 4096 byte pages */
+ u16 formula_entry_count;
+ u8 reserved6[2];
+ u32 core_event_offset;
+ u32 thread_event_offset;
+ u32 chip_event_offset;
+ u32 core_group_offset;
+ u32 thread_group_offset;
+ u32 chip_group_offset;
+} __packed;
+
+struct nest_catalog_group_data {
+ u16 length; /* in bytes, must be a multiple of 16 */
+ u8 reserved1[2];
+ u32 flags;
+ u8 domain;
+ u8 reserved2[1];
+ u16 event_group_record_start_offs;
+ u16 event_group_record_len;
+ u8 group_schema_index;
+ u8 event_count;
+ u16 event_index[16];
+ u16 group_name_len;
+ u8 remainder[1];
+} __packed;
+
+struct nest_catalog_events_data {
+ u16 length; /* in bytes, must be a multiple of 16 */
+ u16 formula_index;
+ u8 domain;
+ u8 reserved2[1];
+ u16 event_group_record_offs;
+ u16 event_group_record_len; /* in bytes */
+ u16 event_counter_offs;
+ u32 flags;
+ u16 primary_group_ix;
+ u16 group_count;
+ u16 event_name_len;
+ u8 remainder[1];
+} __packed;
+
+
+#define CHIP_EVENTS_SUPPORTED 1
+#define CHIP_EVENTS_NOT_SUPPORTED 0
+
+/*
+ * Just for optimisation, save only relevant addrs
+ */
+struct nest_catalog_desc {
+ char *catalog;
+ char *group_entry;
+ char *event_entry;
+ char *thread_event_entry;
+ char *core_event_entry;
+ char *chip_event_entry;
+ char *thread_group_entry;
+ char *core_group_entry;
+ char *chip_group_entry;
+};
+
+#define CATALOG(x) (x)->catalog
+#define GROUP_ENTRY(x) (x)->group_entry
+#define EVENT_ENTRY(x) (x)->event_entry
+#define CORE_EVENT_ENTRY(x) (x)->core_event_entry
+#define CHIP_EVENT_ENTRY(x) (x)->chip_event_entry
+#define CORE_GROUP_ENTRY(x) (x)->core_group_entry
+#define CHIP_GROUP_ENTRY(x) (x)->chip_group_entry
+
+/*Size of Nest Catalog LID (256KBytes) */
+#define NEST_CATALOG_SIZE 0x40000
+
+/*
+ * Function prototypes
+ */
+int preload_catalog_lid(void);
+int load_catalog_lid(int loaded);
+void nest_pmu_init(int loaded);
+
+#endif /* __NEST_H__ */
--
1.9.1
More information about the Skiboot
mailing list