On 1/28/21 5:09 PM, Mike Leach wrote:
Creates an system management API to allow complex configurations and
features to be programmed into a CoreSight infrastructure.
A feature is defined as a programming set for a device or class of
devices.
A configuration is a set of features across the system that are enabled
for a trace session.
The API will manage system wide configuration, and allow complex
programmed features to be added to individual device instances, and
provide for system wide configuration selection on trace capture
operations.
This patch creates the initial data object and the initial API for
loading configurations and features.
Signed-off-by: Mike Leach <mike.leach@xxxxxxxxxx>
---
drivers/hwtracing/coresight/Makefile | 2 +-
.../hwtracing/coresight/coresight-config.h | 167 +++++++++++++++
drivers/hwtracing/coresight/coresight-core.c | 12 +-
.../hwtracing/coresight/coresight-etm-perf.c | 2 +-
.../hwtracing/coresight/coresight-etm-perf.h | 2 +-
.../hwtracing/coresight/coresight-syscfg.c | 197 ++++++++++++++++++
.../hwtracing/coresight/coresight-syscfg.h | 54 +++++
7 files changed, 432 insertions(+), 4 deletions(-)
create mode 100644 drivers/hwtracing/coresight/coresight-config.h
create mode 100644 drivers/hwtracing/coresight/coresight-syscfg.c
create mode 100644 drivers/hwtracing/coresight/coresight-syscfg.h
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index f20e357758d1..4ce854c434b1 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -4,7 +4,7 @@
#
obj-$(CONFIG_CORESIGHT) += coresight.o
coresight-y := coresight-core.o coresight-etm-perf.o coresight-platform.o \
- coresight-sysfs.o
+ coresight-sysfs.o coresight-syscfg.o
obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o
coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \
coresight-tmc-etr.o
diff --git a/drivers/hwtracing/coresight/coresight-config.h b/drivers/hwtracing/coresight/coresight-config.h
new file mode 100644
index 000000000000..3fedf8ab3cee
--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-config.h
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2020 Linaro Limited, All rights reserved.
+ * Author: Mike Leach <mike.leach@xxxxxxxxxx>
+ */
+
+#ifndef _CORESIGHT_CORESIGHT_CONFIG_H
+#define _CORESIGHT_CORESIGHT_CONFIG_H
+
+#include <linux/coresight.h>
+#include <linux/types.h>
+
+/* CoreSight Configuration Management - component and system wide configuration */
+
+/*
+ * Register type flags for register value descriptor:
+ * describe how the value is interpreted, and handled.
+ */
+#define CS_CFG_REG_TYPE_STD 0x80 /* reg is standard reg */
+#define CS_CFG_REG_TYPE_RESOURCE 0x40 /* reg is a resource */
+#define CS_CFG_REG_TYPE_VAL_PARAM 0x08 /* reg value uses param */
+#define CS_CFG_REG_TYPE_VAL_MASK 0x04 /* reg value bit masked */
+#define CS_CFG_REG_TYPE_VAL_64BIT 0x02 /* reg value 64 bit */
+#define CS_CFG_REG_TYPE_VAL_SAVE 0x01 /* reg value save on disable */
+
+/*
+ * flags defining what device class a feature will match to when processing a
+ * system configuration - used by config data and devices.
+ */
+#define CS_CFG_MATCH_CLASS_SRC_ALL 0x0001 /* match any source */
+#define CS_CFG_MATCH_CLASS_SRC_ETM4 0x0002 /* match any ETMv4 device */
+
+/* flags defining device instance matching - used in config match desc data. */
+#define CS_CFG_MATCH_INST_ANY 0x80000000 /* any instance of a class */
+
+/*
+ * Limit number of presets in a configuration
+ * This is related to the number of bits (4) we use to select the preset on
+ * the perf command line. Preset 0 is always none selected.
+ * See PMU_FORMAT_ATTR(preset, "config:0-3") in coresight-etm-perf.c
+ */
+#define CS_CFG_CONFIG_PRESET_MAX 15
+
+/**
+ * Parameter descriptor for a device feature.
+ *
+ * @name: Name of parameter.
+ * @value: Initial or default value.
+ */
+struct cscfg_parameter_desc {
+ const char *name;
+ u64 value;
+};
+
+/**
+ * Representation of register value.
+ *
+ * Supports full 64 bit register value, or 32 bit value with optional mask
+ * value.
+ *
+ * @type: define register usage and interpretation.
+ * @offset: the address offset for register in the hardware device (per device specification).
+ * @hw_info: optional hardware device type specific information. (ETM / CTI specific etc)
+ * @val64: 64 bit value.
+ * @val32: 32 bit value.
+ * @mask32: 32 bit mask when using 32 bit value to access device register.
+ */
+struct cscfg_regval_desc {
+ struct {
+ u32 type:8;
+ u32 offset:12;
+ u32 hw_info:12;
+ };
+ union {
+ u64 val64;
+ struct {
+ u32 val32;
+ u32 mask32;
+ };
+ };
+};
Is it possible to indicate whether the register value is 64bit or 32bit within the
structure, rather than having this outside ? That way cscfg_regval_desc is a complete
entity. (Realized this while looking at patch 2)
Suzuki
