582 lines
17 KiB
C
582 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2012, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _LINUX_CORESIGHT_H
|
|
#define _LINUX_CORESIGHT_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/perf_event.h>
|
|
#include <linux/sched.h>
|
|
|
|
/* Peripheral id registers (0xFD0-0xFEC) */
|
|
#define CORESIGHT_PERIPHIDR4 0xfd0
|
|
#define CORESIGHT_PERIPHIDR5 0xfd4
|
|
#define CORESIGHT_PERIPHIDR6 0xfd8
|
|
#define CORESIGHT_PERIPHIDR7 0xfdC
|
|
#define CORESIGHT_PERIPHIDR0 0xfe0
|
|
#define CORESIGHT_PERIPHIDR1 0xfe4
|
|
#define CORESIGHT_PERIPHIDR2 0xfe8
|
|
#define CORESIGHT_PERIPHIDR3 0xfeC
|
|
/* Component id registers (0xFF0-0xFFC) */
|
|
#define CORESIGHT_COMPIDR0 0xff0
|
|
#define CORESIGHT_COMPIDR1 0xff4
|
|
#define CORESIGHT_COMPIDR2 0xff8
|
|
#define CORESIGHT_COMPIDR3 0xffC
|
|
|
|
#define ETM_ARCH_V3_3 0x23
|
|
#define ETM_ARCH_V3_5 0x25
|
|
#define PFT_ARCH_V1_0 0x30
|
|
#define PFT_ARCH_V1_1 0x31
|
|
|
|
#define CORESIGHT_UNLOCK 0xc5acce55
|
|
|
|
extern struct bus_type coresight_bustype;
|
|
|
|
enum coresight_dev_type {
|
|
CORESIGHT_DEV_TYPE_NONE,
|
|
CORESIGHT_DEV_TYPE_SINK,
|
|
CORESIGHT_DEV_TYPE_LINK,
|
|
CORESIGHT_DEV_TYPE_LINKSINK,
|
|
CORESIGHT_DEV_TYPE_SOURCE,
|
|
CORESIGHT_DEV_TYPE_HELPER,
|
|
CORESIGHT_DEV_TYPE_ECT,
|
|
};
|
|
|
|
enum coresight_dev_subtype_sink {
|
|
CORESIGHT_DEV_SUBTYPE_SINK_NONE,
|
|
CORESIGHT_DEV_SUBTYPE_SINK_PORT,
|
|
CORESIGHT_DEV_SUBTYPE_SINK_BUFFER,
|
|
CORESIGHT_DEV_SUBTYPE_SINK_SYSMEM,
|
|
CORESIGHT_DEV_SUBTYPE_SINK_PERCPU_SYSMEM,
|
|
};
|
|
|
|
enum coresight_dev_subtype_link {
|
|
CORESIGHT_DEV_SUBTYPE_LINK_NONE,
|
|
CORESIGHT_DEV_SUBTYPE_LINK_MERG,
|
|
CORESIGHT_DEV_SUBTYPE_LINK_SPLIT,
|
|
CORESIGHT_DEV_SUBTYPE_LINK_FIFO,
|
|
};
|
|
|
|
enum coresight_dev_subtype_source {
|
|
CORESIGHT_DEV_SUBTYPE_SOURCE_NONE,
|
|
CORESIGHT_DEV_SUBTYPE_SOURCE_PROC,
|
|
CORESIGHT_DEV_SUBTYPE_SOURCE_BUS,
|
|
CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE,
|
|
};
|
|
|
|
enum coresight_dev_subtype_helper {
|
|
CORESIGHT_DEV_SUBTYPE_HELPER_NONE,
|
|
CORESIGHT_DEV_SUBTYPE_HELPER_CATU,
|
|
};
|
|
|
|
/* Embedded Cross Trigger (ECT) sub-types */
|
|
enum coresight_dev_subtype_ect {
|
|
CORESIGHT_DEV_SUBTYPE_ECT_NONE,
|
|
CORESIGHT_DEV_SUBTYPE_ECT_CTI,
|
|
};
|
|
|
|
/**
|
|
* union coresight_dev_subtype - further characterisation of a type
|
|
* @sink_subtype: type of sink this component is, as defined
|
|
* by @coresight_dev_subtype_sink.
|
|
* @link_subtype: type of link this component is, as defined
|
|
* by @coresight_dev_subtype_link.
|
|
* @source_subtype: type of source this component is, as defined
|
|
* by @coresight_dev_subtype_source.
|
|
* @helper_subtype: type of helper this component is, as defined
|
|
* by @coresight_dev_subtype_helper.
|
|
* @ect_subtype: type of cross trigger this component is, as
|
|
* defined by @coresight_dev_subtype_ect
|
|
*/
|
|
union coresight_dev_subtype {
|
|
/* We have some devices which acts as LINK and SINK */
|
|
struct {
|
|
enum coresight_dev_subtype_sink sink_subtype;
|
|
enum coresight_dev_subtype_link link_subtype;
|
|
};
|
|
enum coresight_dev_subtype_source source_subtype;
|
|
enum coresight_dev_subtype_helper helper_subtype;
|
|
enum coresight_dev_subtype_ect ect_subtype;
|
|
};
|
|
|
|
/**
|
|
* struct coresight_platform_data - data harvested from the firmware
|
|
* specification.
|
|
*
|
|
* @nr_inport: Number of elements for the input connections.
|
|
* @nr_outport: Number of elements for the output connections.
|
|
* @conns: Sparse array of nr_outport connections from this component.
|
|
*/
|
|
struct coresight_platform_data {
|
|
int nr_inport;
|
|
int nr_outport;
|
|
struct coresight_connection *conns;
|
|
};
|
|
|
|
/**
|
|
* struct csdev_access - Abstraction of a CoreSight device access.
|
|
*
|
|
* @io_mem : True if the device has memory mapped I/O
|
|
* @base : When io_mem == true, base address of the component
|
|
* @read : Read from the given "offset" of the given instance.
|
|
* @write : Write "val" to the given "offset".
|
|
*/
|
|
struct csdev_access {
|
|
bool io_mem;
|
|
union {
|
|
void __iomem *base;
|
|
struct {
|
|
u64 (*read)(u32 offset, bool relaxed, bool _64bit);
|
|
void (*write)(u64 val, u32 offset, bool relaxed,
|
|
bool _64bit);
|
|
};
|
|
};
|
|
};
|
|
|
|
#define CSDEV_ACCESS_IOMEM(_addr) \
|
|
((struct csdev_access) { \
|
|
.io_mem = true, \
|
|
.base = (_addr), \
|
|
})
|
|
|
|
/**
|
|
* struct coresight_desc - description of a component required from drivers
|
|
* @type: as defined by @coresight_dev_type.
|
|
* @subtype: as defined by @coresight_dev_subtype.
|
|
* @ops: generic operations for this component, as defined
|
|
* by @coresight_ops.
|
|
* @pdata: platform data collected from DT.
|
|
* @dev: The device entity associated to this component.
|
|
* @groups: operations specific to this component. These will end up
|
|
* in the component's sysfs sub-directory.
|
|
* @name: name for the coresight device, also shown under sysfs.
|
|
* @access: Describe access to the device
|
|
*/
|
|
struct coresight_desc {
|
|
enum coresight_dev_type type;
|
|
union coresight_dev_subtype subtype;
|
|
const struct coresight_ops *ops;
|
|
struct coresight_platform_data *pdata;
|
|
struct device *dev;
|
|
const struct attribute_group **groups;
|
|
const char *name;
|
|
struct csdev_access access;
|
|
};
|
|
|
|
/**
|
|
* struct coresight_connection - representation of a single connection
|
|
* @outport: a connection's output port number.
|
|
* @child_port: remote component's port number @output is connected to.
|
|
* @chid_fwnode: remote component's fwnode handle.
|
|
* @child_dev: a @coresight_device representation of the component
|
|
connected to @outport.
|
|
* @link: Representation of the connection as a sysfs link.
|
|
*/
|
|
struct coresight_connection {
|
|
int outport;
|
|
int child_port;
|
|
struct fwnode_handle *child_fwnode;
|
|
struct coresight_device *child_dev;
|
|
struct coresight_sysfs_link *link;
|
|
};
|
|
|
|
/**
|
|
* struct coresight_sysfs_link - representation of a connection in sysfs.
|
|
* @orig: Originating (master) coresight device for the link.
|
|
* @orig_name: Name to use for the link orig->target.
|
|
* @target: Target (slave) coresight device for the link.
|
|
* @target_name: Name to use for the link target->orig.
|
|
*/
|
|
struct coresight_sysfs_link {
|
|
struct coresight_device *orig;
|
|
const char *orig_name;
|
|
struct coresight_device *target;
|
|
const char *target_name;
|
|
};
|
|
|
|
/**
|
|
* struct coresight_device - representation of a device as used by the framework
|
|
* @pdata: Platform data with device connections associated to this device.
|
|
* @type: as defined by @coresight_dev_type.
|
|
* @subtype: as defined by @coresight_dev_subtype.
|
|
* @ops: generic operations for this component, as defined
|
|
* by @coresight_ops.
|
|
* @access: Device i/o access abstraction for this device.
|
|
* @dev: The device entity associated to this component.
|
|
* @refcnt: keep track of what is in use.
|
|
* @orphan: true if the component has connections that haven't been linked.
|
|
* @enable: 'true' if component is currently part of an active path.
|
|
* @activated: 'true' only if a _sink_ has been activated. A sink can be
|
|
* activated but not yet enabled. Enabling for a _sink_
|
|
* happens when a source has been selected and a path is enabled
|
|
* from source to that sink.
|
|
* @ea: Device attribute for sink representation under PMU directory.
|
|
* @def_sink: cached reference to default sink found for this device.
|
|
* @ect_dev: Associated cross trigger device. Not part of the trace data
|
|
* path or connections.
|
|
* @nr_links: number of sysfs links created to other components from this
|
|
* device. These will appear in the "connections" group.
|
|
* @has_conns_grp: Have added a "connections" group for sysfs links.
|
|
*/
|
|
struct coresight_device {
|
|
struct coresight_platform_data *pdata;
|
|
enum coresight_dev_type type;
|
|
union coresight_dev_subtype subtype;
|
|
const struct coresight_ops *ops;
|
|
struct csdev_access access;
|
|
struct device dev;
|
|
atomic_t *refcnt;
|
|
bool orphan;
|
|
bool enable; /* true only if configured as part of a path */
|
|
/* sink specific fields */
|
|
bool activated; /* true only if a sink is part of a path */
|
|
struct dev_ext_attribute *ea;
|
|
struct coresight_device *def_sink;
|
|
/* cross trigger handling */
|
|
struct coresight_device *ect_dev;
|
|
/* sysfs links between components */
|
|
int nr_links;
|
|
bool has_conns_grp;
|
|
bool ect_enabled; /* true only if associated ect device is enabled */
|
|
};
|
|
|
|
/*
|
|
* coresight_dev_list - Mapping for devices to "name" index for device
|
|
* names.
|
|
*
|
|
* @nr_idx: Number of entries already allocated.
|
|
* @pfx: Prefix pattern for device name.
|
|
* @fwnode_list: Array of fwnode_handles associated with each allocated
|
|
* index, upto nr_idx entries.
|
|
*/
|
|
struct coresight_dev_list {
|
|
int nr_idx;
|
|
const char *pfx;
|
|
struct fwnode_handle **fwnode_list;
|
|
};
|
|
|
|
#define DEFINE_CORESIGHT_DEVLIST(var, dev_pfx) \
|
|
static struct coresight_dev_list (var) = { \
|
|
.pfx = dev_pfx, \
|
|
.nr_idx = 0, \
|
|
.fwnode_list = NULL, \
|
|
}
|
|
|
|
#define to_coresight_device(d) container_of(d, struct coresight_device, dev)
|
|
|
|
#define source_ops(csdev) csdev->ops->source_ops
|
|
#define sink_ops(csdev) csdev->ops->sink_ops
|
|
#define link_ops(csdev) csdev->ops->link_ops
|
|
#define helper_ops(csdev) csdev->ops->helper_ops
|
|
#define ect_ops(csdev) csdev->ops->ect_ops
|
|
|
|
/**
|
|
* struct coresight_ops_sink - basic operations for a sink
|
|
* Operations available for sinks
|
|
* @enable: enables the sink.
|
|
* @disable: disables the sink.
|
|
* @alloc_buffer: initialises perf's ring buffer for trace collection.
|
|
* @free_buffer: release memory allocated in @get_config.
|
|
* @update_buffer: update buffer pointers after a trace session.
|
|
*/
|
|
struct coresight_ops_sink {
|
|
int (*enable)(struct coresight_device *csdev, u32 mode, void *data);
|
|
int (*disable)(struct coresight_device *csdev);
|
|
void *(*alloc_buffer)(struct coresight_device *csdev,
|
|
struct perf_event *event, void **pages,
|
|
int nr_pages, bool overwrite);
|
|
void (*free_buffer)(void *config);
|
|
unsigned long (*update_buffer)(struct coresight_device *csdev,
|
|
struct perf_output_handle *handle,
|
|
void *sink_config);
|
|
};
|
|
|
|
/**
|
|
* struct coresight_ops_link - basic operations for a link
|
|
* Operations available for links.
|
|
* @enable: enables flow between iport and oport.
|
|
* @disable: disables flow between iport and oport.
|
|
*/
|
|
struct coresight_ops_link {
|
|
int (*enable)(struct coresight_device *csdev, int iport, int oport);
|
|
void (*disable)(struct coresight_device *csdev, int iport, int oport);
|
|
};
|
|
|
|
/**
|
|
* struct coresight_ops_source - basic operations for a source
|
|
* Operations available for sources.
|
|
* @cpu_id: returns the value of the CPU number this component
|
|
* is associated to.
|
|
* @trace_id: returns the value of the component's trace ID as known
|
|
* to the HW.
|
|
* @enable: enables tracing for a source.
|
|
* @disable: disables tracing for a source.
|
|
*/
|
|
struct coresight_ops_source {
|
|
int (*cpu_id)(struct coresight_device *csdev);
|
|
int (*trace_id)(struct coresight_device *csdev);
|
|
int (*enable)(struct coresight_device *csdev,
|
|
struct perf_event *event, u32 mode);
|
|
void (*disable)(struct coresight_device *csdev,
|
|
struct perf_event *event);
|
|
};
|
|
|
|
/**
|
|
* struct coresight_ops_helper - Operations for a helper device.
|
|
*
|
|
* All operations could pass in a device specific data, which could
|
|
* help the helper device to determine what to do.
|
|
*
|
|
* @enable : Enable the device
|
|
* @disable : Disable the device
|
|
*/
|
|
struct coresight_ops_helper {
|
|
int (*enable)(struct coresight_device *csdev, void *data);
|
|
int (*disable)(struct coresight_device *csdev, void *data);
|
|
};
|
|
|
|
/**
|
|
* struct coresight_ops_ect - Ops for an embedded cross trigger device
|
|
*
|
|
* @enable : Enable the device
|
|
* @disable : Disable the device
|
|
*/
|
|
struct coresight_ops_ect {
|
|
int (*enable)(struct coresight_device *csdev);
|
|
int (*disable)(struct coresight_device *csdev);
|
|
};
|
|
|
|
struct coresight_ops {
|
|
const struct coresight_ops_sink *sink_ops;
|
|
const struct coresight_ops_link *link_ops;
|
|
const struct coresight_ops_source *source_ops;
|
|
const struct coresight_ops_helper *helper_ops;
|
|
const struct coresight_ops_ect *ect_ops;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_CORESIGHT)
|
|
|
|
static inline u32 csdev_access_relaxed_read32(struct csdev_access *csa,
|
|
u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
return readl_relaxed(csa->base + offset);
|
|
|
|
return csa->read(offset, true, false);
|
|
}
|
|
|
|
static inline u32 csdev_access_read32(struct csdev_access *csa, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
return readl(csa->base + offset);
|
|
|
|
return csa->read(offset, false, false);
|
|
}
|
|
|
|
static inline void csdev_access_relaxed_write32(struct csdev_access *csa,
|
|
u32 val, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
writel_relaxed(val, csa->base + offset);
|
|
else
|
|
csa->write(val, offset, true, false);
|
|
}
|
|
|
|
static inline void csdev_access_write32(struct csdev_access *csa, u32 val, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
writel(val, csa->base + offset);
|
|
else
|
|
csa->write(val, offset, false, false);
|
|
}
|
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
static inline u64 csdev_access_relaxed_read64(struct csdev_access *csa,
|
|
u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
return readq_relaxed(csa->base + offset);
|
|
|
|
return csa->read(offset, true, true);
|
|
}
|
|
|
|
static inline u64 csdev_access_read64(struct csdev_access *csa, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
return readq(csa->base + offset);
|
|
|
|
return csa->read(offset, false, true);
|
|
}
|
|
|
|
static inline void csdev_access_relaxed_write64(struct csdev_access *csa,
|
|
u64 val, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
writeq_relaxed(val, csa->base + offset);
|
|
else
|
|
csa->write(val, offset, true, true);
|
|
}
|
|
|
|
static inline void csdev_access_write64(struct csdev_access *csa, u64 val, u32 offset)
|
|
{
|
|
if (likely(csa->io_mem))
|
|
writeq(val, csa->base + offset);
|
|
else
|
|
csa->write(val, offset, false, true);
|
|
}
|
|
|
|
#else /* !CONFIG_64BIT */
|
|
|
|
static inline u64 csdev_access_relaxed_read64(struct csdev_access *csa,
|
|
u32 offset)
|
|
{
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline u64 csdev_access_read64(struct csdev_access *csa, u32 offset)
|
|
{
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline void csdev_access_relaxed_write64(struct csdev_access *csa,
|
|
u64 val, u32 offset)
|
|
{
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline void csdev_access_write64(struct csdev_access *csa, u64 val, u32 offset)
|
|
{
|
|
WARN_ON(1);
|
|
}
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
static inline bool coresight_is_percpu_source(struct coresight_device *csdev)
|
|
{
|
|
return csdev && (csdev->type == CORESIGHT_DEV_TYPE_SOURCE) &&
|
|
(csdev->subtype.source_subtype == CORESIGHT_DEV_SUBTYPE_SOURCE_PROC);
|
|
}
|
|
|
|
static inline bool coresight_is_percpu_sink(struct coresight_device *csdev)
|
|
{
|
|
return csdev && (csdev->type == CORESIGHT_DEV_TYPE_SINK) &&
|
|
(csdev->subtype.sink_subtype == CORESIGHT_DEV_SUBTYPE_SINK_PERCPU_SYSMEM);
|
|
}
|
|
|
|
extern struct coresight_device *
|
|
coresight_register(struct coresight_desc *desc);
|
|
extern void coresight_unregister(struct coresight_device *csdev);
|
|
extern int coresight_enable(struct coresight_device *csdev);
|
|
extern void coresight_disable(struct coresight_device *csdev);
|
|
extern int coresight_timeout(struct csdev_access *csa, u32 offset,
|
|
int position, int value);
|
|
|
|
extern int coresight_claim_device(struct coresight_device *csdev);
|
|
extern int coresight_claim_device_unlocked(struct coresight_device *csdev);
|
|
|
|
extern void coresight_disclaim_device(struct coresight_device *csdev);
|
|
extern void coresight_disclaim_device_unlocked(struct coresight_device *csdev);
|
|
extern char *coresight_alloc_device_name(struct coresight_dev_list *devs,
|
|
struct device *dev);
|
|
|
|
extern bool coresight_loses_context_with_cpu(struct device *dev);
|
|
|
|
u32 coresight_relaxed_read32(struct coresight_device *csdev, u32 offset);
|
|
u32 coresight_read32(struct coresight_device *csdev, u32 offset);
|
|
void coresight_write32(struct coresight_device *csdev, u32 val, u32 offset);
|
|
void coresight_relaxed_write32(struct coresight_device *csdev,
|
|
u32 val, u32 offset);
|
|
u64 coresight_relaxed_read64(struct coresight_device *csdev, u32 offset);
|
|
u64 coresight_read64(struct coresight_device *csdev, u32 offset);
|
|
void coresight_relaxed_write64(struct coresight_device *csdev,
|
|
u64 val, u32 offset);
|
|
void coresight_write64(struct coresight_device *csdev, u64 val, u32 offset);
|
|
|
|
#else
|
|
static inline struct coresight_device *
|
|
coresight_register(struct coresight_desc *desc) { return NULL; }
|
|
static inline void coresight_unregister(struct coresight_device *csdev) {}
|
|
static inline int
|
|
coresight_enable(struct coresight_device *csdev) { return -ENOSYS; }
|
|
static inline void coresight_disable(struct coresight_device *csdev) {}
|
|
|
|
static inline int coresight_timeout(struct csdev_access *csa, u32 offset,
|
|
int position, int value)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline int coresight_claim_device_unlocked(struct coresight_device *csdev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int coresight_claim_device(struct coresight_device *csdev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void coresight_disclaim_device(struct coresight_device *csdev) {}
|
|
static inline void coresight_disclaim_device_unlocked(struct coresight_device *csdev) {}
|
|
|
|
static inline bool coresight_loses_context_with_cpu(struct device *dev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline u32 coresight_relaxed_read32(struct coresight_device *csdev, u32 offset)
|
|
{
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline u32 coresight_read32(struct coresight_device *csdev, u32 offset)
|
|
{
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline void coresight_write32(struct coresight_device *csdev, u32 val, u32 offset)
|
|
{
|
|
}
|
|
|
|
static inline void coresight_relaxed_write32(struct coresight_device *csdev,
|
|
u32 val, u32 offset)
|
|
{
|
|
}
|
|
|
|
static inline u64 coresight_relaxed_read64(struct coresight_device *csdev,
|
|
u32 offset)
|
|
{
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline u64 coresight_read64(struct coresight_device *csdev, u32 offset)
|
|
{
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline void coresight_relaxed_write64(struct coresight_device *csdev,
|
|
u64 val, u32 offset)
|
|
{
|
|
}
|
|
|
|
static inline void coresight_write64(struct coresight_device *csdev, u64 val, u32 offset)
|
|
{
|
|
}
|
|
|
|
#endif /* IS_ENABLED(CONFIG_CORESIGHT) */
|
|
|
|
extern int coresight_get_cpu(struct device *dev);
|
|
|
|
struct coresight_platform_data *coresight_get_platform_data(struct device *dev);
|
|
|
|
#endif /* _LINUX_COREISGHT_H */
|