linux/drivers/hwtracing/coresight/coresight-etm.h

/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _CORESIGHT_CORESIGHT_ETM_H
#define _CORESIGHT_CORESIGHT_ETM_H

#include <asm/local.h>
#include <linux/spinlock.h>
#include "coresight-priv.h"

/*
 * Device registers:
 * 0x000 - 0x2FC: Trace         registers
 * 0x300 - 0x314: Management    registers
 * 0x318 - 0xEFC: Trace         registers
 *
 * Coresight registers
 * 0xF00 - 0xF9C: Management    registers
 * 0xFA0 - 0xFA4: Management    registers in PFTv1.0
 *                Trace         registers in PFTv1.1
 * 0xFA8 - 0xFFC: Management    registers
 */

/* Trace registers (0x000-0x2FC) */
#define ETMCR			0x000
#define ETMCCR			0x004
#define ETMTRIGGER		0x008
#define ETMSR			0x010
#define ETMSCR			0x014
#define ETMTSSCR		0x018
#define ETMTECR2		0x01c
#define ETMTEEVR		0x020
#define ETMTECR1		0x024
#define ETMFFLR			0x02c
#define ETMACVRn(n)		(0x040 + (n * 4))
#define ETMACTRn(n)		(0x080 + (n * 4))
#define ETMCNTRLDVRn(n)		(0x140 + (n * 4))
#define ETMCNTENRn(n)		(0x150 + (n * 4))
#define ETMCNTRLDEVRn(n)	(0x160 + (n * 4))
#define ETMCNTVRn(n)		(0x170 + (n * 4))
#define ETMSQ12EVR		0x180
#define ETMSQ21EVR		0x184
#define ETMSQ23EVR		0x188
#define ETMSQ31EVR		0x18c
#define ETMSQ32EVR		0x190
#define ETMSQ13EVR		0x194
#define ETMSQR			0x19c
#define ETMEXTOUTEVRn(n)	(0x1a0 + (n * 4))
#define ETMCIDCVRn(n)		(0x1b0 + (n * 4))
#define ETMCIDCMR		0x1bc
#define ETMIMPSPEC0		0x1c0
#define ETMIMPSPEC1		0x1c4
#define ETMIMPSPEC2		0x1c8
#define ETMIMPSPEC3		0x1cc
#define ETMIMPSPEC4		0x1d0
#define ETMIMPSPEC5		0x1d4
#define ETMIMPSPEC6		0x1d8
#define ETMIMPSPEC7		0x1dc
#define ETMSYNCFR		0x1e0
#define ETMIDR			0x1e4
#define ETMCCER			0x1e8
#define ETMEXTINSELR		0x1ec
#define ETMTESSEICR		0x1f0
#define ETMEIBCR		0x1f4
#define ETMTSEVR		0x1f8
#define ETMAUXCR		0x1fc
#define ETMTRACEIDR		0x200
#define ETMVMIDCVR		0x240
/* Management registers (0x300-0x314) */
#define ETMOSLAR		0x300
#define ETMOSLSR		0x304
#define ETMOSSRR		0x308
#define ETMPDCR			0x310
#define ETMPDSR			0x314
#define ETM_MAX_ADDR_CMP	16
#define ETM_MAX_CNTR		4
#define ETM_MAX_CTXID_CMP	3

/* Register definition */
/* ETMCR - 0x00 */
#define ETMCR_PWD_DWN		BIT(0)
#define ETMCR_STALL_MODE	BIT(7)
#define ETMCR_BRANCH_BROADCAST	BIT(8)
#define ETMCR_ETM_PRG		BIT(10)
#define ETMCR_ETM_EN		BIT(11)
#define ETMCR_CYC_ACC		BIT(12)
#define ETMCR_CTXID_SIZE	(BIT(14)|BIT(15))
#define ETMCR_TIMESTAMP_EN	BIT(28)
#define ETMCR_RETURN_STACK	BIT(29)
/* ETMCCR - 0x04 */
#define ETMCCR_FIFOFULL		BIT(23)
/* ETMPDCR - 0x310 */
#define ETMPDCR_PWD_UP		BIT(3)
/* ETMTECR1 - 0x024 */
#define ETMTECR1_ADDR_COMP_1	BIT(0)
#define ETMTECR1_INC_EXC	BIT(24)
#define ETMTECR1_START_STOP	BIT(25)
/* ETMCCER - 0x1E8 */
#define ETMCCER_TIMESTAMP	BIT(22)
#define ETMCCER_RETSTACK	BIT(23)

#define ETM_MODE_EXCLUDE	BIT(0)
#define ETM_MODE_CYCACC		BIT(1)
#define ETM_MODE_STALL		BIT(2)
#define ETM_MODE_TIMESTAMP	BIT(3)
#define ETM_MODE_CTXID		BIT(4)
#define ETM_MODE_BBROAD		BIT(5)
#define ETM_MODE_RET_STACK	BIT(6)
#define ETM_MODE_ALL		(ETM_MODE_EXCLUDE | ETM_MODE_CYCACC | \
				 ETM_MODE_STALL | ETM_MODE_TIMESTAMP | \
				 ETM_MODE_BBROAD | ETM_MODE_RET_STACK | \
				 ETM_MODE_CTXID | ETM_MODE_EXCL_KERN | \
				 ETM_MODE_EXCL_USER)

#define ETM_SQR_MASK		0x3
#define ETM_TRACEID_MASK	0x3f
#define ETM_EVENT_MASK		0x1ffff
#define ETM_SYNC_MASK		0xfff
#define ETM_ALL_MASK		0xffffffff

#define ETMSR_PROG_BIT		1
#define ETM_SEQ_STATE_MAX_VAL	(0x2)
#define PORT_SIZE_MASK		(GENMASK(21, 21) | GENMASK(6, 4))

#define ETM_HARD_WIRE_RES_A	/* Hard wired, always true */	\
				((0x0f << 0)	|		\
				/* Resource index A */		\
				(0x06 << 4))

#define ETM_ADD_COMP_0		/* Single addr comparator 1 */	\
				((0x00 << 7)	|		\
				/* Resource index B */		\
				(0x00 << 11))

#define ETM_EVENT_NOT_A		BIT(14) /* NOT(A) */

#define ETM_DEFAULT_EVENT_VAL	(ETM_HARD_WIRE_RES_A	|	\
				 ETM_ADD_COMP_0		|	\
				 ETM_EVENT_NOT_A)

/**
 * struct etm_config - configuration information related to an ETM
 * @mode:	controls various modes supported by this ETM/PTM.
 * @ctrl:	used in conjunction with @mode.
 * @trigger_event: setting for register ETMTRIGGER.
 * @startstop_ctrl: setting for register ETMTSSCR.
 * @enable_event: setting for register ETMTEEVR.
 * @enable_ctrl1: setting for register ETMTECR1.
 * @enable_ctrl2: setting for register ETMTECR2.
 * @fifofull_level: setting for register ETMFFLR.
 * @addr_idx:	index for the address comparator selection.
 * @addr_val:	value for address comparator register.
 * @addr_acctype: access type for address comparator register.
 * @addr_type:	current status of the comparator register.
 * @cntr_idx:	index for the counter register selection.
 * @cntr_rld_val: reload value of a counter register.
 * @cntr_event:	control for counter enable register.
 * @cntr_rld_event: value for counter reload event register.
 * @cntr_val:	counter value register.
 * @seq_12_event: event causing the transition from 1 to 2.
 * @seq_21_event: event causing the transition from 2 to 1.
 * @seq_23_event: event causing the transition from 2 to 3.
 * @seq_31_event: event causing the transition from 3 to 1.
 * @seq_32_event: event causing the transition from 3 to 2.
 * @seq_13_event: event causing the transition from 1 to 3.
 * @seq_curr_state: current value of the sequencer register.
 * @ctxid_idx: index for the context ID registers.
 * @ctxid_pid: value for the context ID to trigger on.
 * @ctxid_vpid:	Virtual PID seen by users if PID namespace is enabled, otherwise
 *		the same value of ctxid_pid.
 * @ctxid_mask: mask applicable to all the context IDs.
 * @sync_freq:	Synchronisation frequency.
 * @timestamp_event: Defines an event that requests the insertion
 *		     of a timestamp into the trace stream.
 */
struct etm_config {
	u32				mode;
	u32				ctrl;
	u32				trigger_event;
	u32				startstop_ctrl;
	u32				enable_event;
	u32				enable_ctrl1;
	u32				enable_ctrl2;
	u32				fifofull_level;
	u8				addr_idx;
	u32				addr_val[ETM_MAX_ADDR_CMP];
	u32				addr_acctype[ETM_MAX_ADDR_CMP];
	u32				addr_type[ETM_MAX_ADDR_CMP];
	u8				cntr_idx;
	u32				cntr_rld_val[ETM_MAX_CNTR];
	u32				cntr_event[ETM_MAX_CNTR];
	u32				cntr_rld_event[ETM_MAX_CNTR];
	u32				cntr_val[ETM_MAX_CNTR];
	u32				seq_12_event;
	u32				seq_21_event;
	u32				seq_23_event;
	u32				seq_31_event;
	u32				seq_32_event;
	u32				seq_13_event;
	u32				seq_curr_state;
	u8				ctxid_idx;
	u32				ctxid_pid[ETM_MAX_CTXID_CMP];
	u32				ctxid_vpid[ETM_MAX_CTXID_CMP];
	u32				ctxid_mask;
	u32				sync_freq;
	u32				timestamp_event;
};

/**
 * struct etm_drvdata - specifics associated to an ETM component
 * @base:	memory mapped base address for this component.
 * @dev:	the device entity associated to this component.
 * @atclk:	optional clock for the core parts of the ETM.
 * @csdev:	component vitals needed by the framework.
 * @spinlock:	only one at a time pls.
 * @cpu:	the cpu this component is affined to.
 * @port_size:	port size as reported by ETMCR bit 4-6 and 21.
 * @arch:	ETM/PTM version number.
 * @use_cpu14:	true if management registers need to be accessed via CP14.
 * @mode:	this tracer's mode, i.e sysFS, Perf or disabled.
 * @sticky_enable: true if ETM base configuration has been done.
 * @boot_enable:true if we should start tracing at boot time.
 * @os_unlock:	true if access to management registers is allowed.
 * @nr_addr_cmp:Number of pairs of address comparators as found in ETMCCR.
 * @nr_cntr:	Number of counters as found in ETMCCR bit 13-15.
 * @nr_ext_inp:	Number of external input as found in ETMCCR bit 17-19.
 * @nr_ext_out:	Number of external output as found in ETMCCR bit 20-22.
 * @nr_ctxid_cmp: Number of contextID comparators as found in ETMCCR bit 24-25.
 * @etmccr:	value of register ETMCCR.
 * @etmccer:	value of register ETMCCER.
 * @traceid:	value of the current ID for this component.
 * @config:	structure holding configuration parameters.
 */
struct etm_drvdata {
	void __iomem			*base;
	struct device			*dev;
	struct clk			*atclk;
	struct coresight_device		*csdev;
	spinlock_t			spinlock;
	int				cpu;
	int				port_size;
	u8				arch;
	bool				use_cp14;
	local_t				mode;
	bool				sticky_enable;
	bool				boot_enable;
	bool				os_unlock;
	u8				nr_addr_cmp;
	u8				nr_cntr;
	u8				nr_ext_inp;
	u8				nr_ext_out;
	u8				nr_ctxid_cmp;
	u32				etmccr;
	u32				etmccer;
	u32				traceid;
	struct etm_config		config;
};

static inline void etm_writel(struct etm_drvdata *drvdata,
			      u32 val, u32 off)
{
	if (drvdata->use_cp14) {
		if (etm_writel_cp14(off, val)) {
			dev_err(drvdata->dev,
				"invalid CP14 access to ETM reg: %#x", off);
		}
	} else {
		writel_relaxed(val, drvdata->base + off);
	}
}

static inline unsigned int etm_readl(struct etm_drvdata *drvdata, u32 off)
{
	u32 val;

	if (drvdata->use_cp14) {
		if (etm_readl_cp14(off, &val)) {
			dev_err(drvdata->dev,
				"invalid CP14 access to ETM reg: %#x", off);
		}
	} else {
		val = readl_relaxed(drvdata->base + off);
	}

	return val;
}

extern const struct attribute_group *coresight_etm_groups[];
int etm_get_trace_id(struct etm_drvdata *drvdata);
void etm_set_default(struct etm_config *config);
void etm_config_trace_mode(struct etm_config *config);
struct etm_config *get_etm_config(struct etm_drvdata *drvdata);
#endif