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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
*/
#ifndef _CORESIGHT_PRIV_H
#define _CORESIGHT_PRIV_H
#include <linux/amba/bus.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/coresight.h>
#include <linux/pm_runtime.h>
/*
* Coresight management registers (0xf00-0xfcc)
* 0xfa0 - 0xfa4: Management registers in PFTv1.0
* Trace registers in PFTv1.1
*/
#define CORESIGHT_ITCTRL 0xf00
#define CORESIGHT_CLAIMSET 0xfa0
#define CORESIGHT_CLAIMCLR 0xfa4
#define CORESIGHT_LAR 0xfb0
#define CORESIGHT_LSR 0xfb4
#define CORESIGHT_AUTHSTATUS 0xfb8
#define CORESIGHT_DEVID 0xfc8
#define CORESIGHT_DEVTYPE 0xfcc
/*
* Coresight device CLAIM protocol.
* See PSCI - ARM DEN 0022D, Section: 6.8.1 Debug and Trace save and restore.
*/
#define CORESIGHT_CLAIM_SELF_HOSTED BIT(1)
#define TIMEOUT_US 100
#define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb)
#define ETM_MODE_EXCL_KERN BIT(30)
#define ETM_MODE_EXCL_USER BIT(31)
typedef u32 (*coresight_read_fn)(const struct device *, u32 offset);
#define __coresight_simple_func(type, func, name, lo_off, hi_off) \
static ssize_t name##_show(struct device *_dev, \
struct device_attribute *attr, char *buf) \
{ \
type *drvdata = dev_get_drvdata(_dev->parent); \
coresight_read_fn fn = func; \
u64 val; \
pm_runtime_get_sync(_dev->parent); \
if (fn) \
val = (u64)fn(_dev->parent, lo_off); \
else \
val = coresight_read_reg_pair(drvdata->base, \
lo_off, hi_off); \
pm_runtime_put_sync(_dev->parent); \
return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val); \
} \
static DEVICE_ATTR_RO(name)
#define coresight_simple_func(type, func, name, offset) \
__coresight_simple_func(type, func, name, offset, -1)
#define coresight_simple_reg32(type, name, offset) \
__coresight_simple_func(type, NULL, name, offset, -1)
#define coresight_simple_reg64(type, name, lo_off, hi_off) \
__coresight_simple_func(type, NULL, name, lo_off, hi_off)
extern const u32 barrier_pkt[4];
#define CORESIGHT_BARRIER_PKT_SIZE (sizeof(barrier_pkt))
enum etm_addr_type {
ETM_ADDR_TYPE_NONE,
ETM_ADDR_TYPE_SINGLE,
ETM_ADDR_TYPE_RANGE,
ETM_ADDR_TYPE_START,
ETM_ADDR_TYPE_STOP,
};
enum cs_mode {
CS_MODE_DISABLED,
CS_MODE_SYSFS,
CS_MODE_PERF,
};
/**
* struct cs_buffer - keep track of a recording session' specifics
* @cur: index of the current buffer
* @nr_pages: max number of pages granted to us
* @offset: offset within the current buffer
* @data_size: how much we collected in this run
* @snapshot: is this run in snapshot mode
* @data_pages: a handle the ring buffer
*/
struct cs_buffers {
unsigned int cur;
unsigned int nr_pages;
unsigned long offset;
local_t data_size;
bool snapshot;
void **data_pages;
};
static inline void coresight_insert_barrier_packet(void *buf)
{
if (buf)
memcpy(buf, barrier_pkt, CORESIGHT_BARRIER_PKT_SIZE);
}
static inline void CS_LOCK(void __iomem *addr)
{
do {
/* Wait for things to settle */
mb();
writel_relaxed(0x0, addr + CORESIGHT_LAR);
} while (0);
}
static inline void CS_UNLOCK(void __iomem *addr)
{
do {
writel_relaxed(CORESIGHT_UNLOCK, addr + CORESIGHT_LAR);
/* Make sure everyone has seen this */
mb();
} while (0);
}
static inline u64
coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset)
{
u64 val;
val = readl_relaxed(addr + lo_offset);
val |= (hi_offset < 0) ? 0 :
(u64)readl_relaxed(addr + hi_offset) << 32;
return val;
}
static inline void coresight_write_reg_pair(void __iomem *addr, u64 val,
s32 lo_offset, s32 hi_offset)
{
writel_relaxed((u32)val, addr + lo_offset);
if (hi_offset >= 0)
writel_relaxed((u32)(val >> 32), addr + hi_offset);
}
void coresight_disable_path(struct list_head *path);
int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data);
struct coresight_device *coresight_get_sink(struct list_head *path);
struct coresight_device *coresight_get_enabled_sink(struct coresight_device *cs,
bool reset);
struct coresight_device *coresight_get_sink_by_id(u32 id);
struct list_head *coresight_build_path(struct coresight_device *csdev,
struct coresight_device *sink);
void coresight_release_path(struct list_head *path);
#ifdef CONFIG_CORESIGHT_SOURCE_ETM3X
extern int etm_readl_cp14(u32 off, unsigned int *val);
extern int etm_writel_cp14(u32 off, u32 val);
#else
static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
#endif
/*
* Macros and inline functions to handle CoreSight UCI data and driver
* private data in AMBA ID table entries, and extract data values.
*/
/* coresight AMBA ID, no UCI, no driver data: id table entry */
#define CS_AMBA_ID(pid) \
{ \
.id = pid, \
.mask = 0x000fffff, \
}
/* coresight AMBA ID, UCI with driver data only: id table entry. */
#define CS_AMBA_ID_DATA(pid, dval) \
{ \
.id = pid, \
.mask = 0x000fffff, \
.data = (void *)&(struct amba_cs_uci_id) \
{ \
.data = (void *)dval, \
} \
}
/* coresight AMBA ID, full UCI structure: id table entry. */
#define CS_AMBA_UCI_ID(pid, uci_ptr) \
{ \
.id = pid, \
.mask = 0x000fffff, \
.data = uci_ptr \
}
/* extract the data value from a UCI structure given amba_id pointer. */
static inline void *coresight_get_uci_data(const struct amba_id *id)
{
if (id->data)
return ((struct amba_cs_uci_id *)(id->data))->data;
return 0;
}
#endif
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