From cde9070d9970eef1f7ec2360586c802a16230ad8 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:50 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux driver
---
kernel/tools/perf/arch/arm/util/cs-etm.c | 388 ++++++++++++++++++++++++++++++++++++------------------
1 files changed, 258 insertions(+), 130 deletions(-)
diff --git a/kernel/tools/perf/arch/arm/util/cs-etm.c b/kernel/tools/perf/arch/arm/util/cs-etm.c
index 16af6c3..cad7bf7 100644
--- a/kernel/tools/perf/arch/arm/util/cs-etm.c
+++ b/kernel/tools/perf/arch/arm/util/cs-etm.c
@@ -5,40 +5,190 @@
*/
#include <api/fs/fs.h>
+#include <linux/bits.h>
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/coresight-pmu.h>
#include <linux/kernel.h>
#include <linux/log2.h>
+#include <linux/string.h>
#include <linux/types.h>
+#include <linux/zalloc.h>
#include "cs-etm.h"
-#include "../../perf.h"
+#include "../../util/debug.h"
+#include "../../util/record.h"
#include "../../util/auxtrace.h"
#include "../../util/cpumap.h"
+#include "../../util/event.h"
#include "../../util/evlist.h"
#include "../../util/evsel.h"
+#include "../../util/perf_api_probe.h"
+#include "../../util/evsel_config.h"
#include "../../util/pmu.h"
-#include "../../util/thread_map.h"
#include "../../util/cs-etm.h"
+#include <internal/lib.h> // page_size
+#include "../../util/session.h"
+#include <errno.h>
#include <stdlib.h>
#include <sys/stat.h>
-
-#define ENABLE_SINK_MAX 128
-#define CS_BUS_DEVICE_PATH "/bus/coresight/devices/"
struct cs_etm_recording {
struct auxtrace_record itr;
struct perf_pmu *cs_etm_pmu;
- struct perf_evlist *evlist;
+ struct evlist *evlist;
int wrapped_cnt;
bool *wrapped;
bool snapshot_mode;
size_t snapshot_size;
};
+static const char *metadata_etmv3_ro[CS_ETM_PRIV_MAX] = {
+ [CS_ETM_ETMCCER] = "mgmt/etmccer",
+ [CS_ETM_ETMIDR] = "mgmt/etmidr",
+};
+
+static const char *metadata_etmv4_ro[CS_ETMV4_PRIV_MAX] = {
+ [CS_ETMV4_TRCIDR0] = "trcidr/trcidr0",
+ [CS_ETMV4_TRCIDR1] = "trcidr/trcidr1",
+ [CS_ETMV4_TRCIDR2] = "trcidr/trcidr2",
+ [CS_ETMV4_TRCIDR8] = "trcidr/trcidr8",
+ [CS_ETMV4_TRCAUTHSTATUS] = "mgmt/trcauthstatus",
+};
+
static bool cs_etm_is_etmv4(struct auxtrace_record *itr, int cpu);
+
+static int cs_etm_set_context_id(struct auxtrace_record *itr,
+ struct evsel *evsel, int cpu)
+{
+ struct cs_etm_recording *ptr;
+ struct perf_pmu *cs_etm_pmu;
+ char path[PATH_MAX];
+ int err = -EINVAL;
+ u32 val;
+
+ ptr = container_of(itr, struct cs_etm_recording, itr);
+ cs_etm_pmu = ptr->cs_etm_pmu;
+
+ if (!cs_etm_is_etmv4(itr, cpu))
+ goto out;
+
+ /* Get a handle on TRCIRD2 */
+ snprintf(path, PATH_MAX, "cpu%d/%s",
+ cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR2]);
+ err = perf_pmu__scan_file(cs_etm_pmu, path, "%x", &val);
+
+ /* There was a problem reading the file, bailing out */
+ if (err != 1) {
+ pr_err("%s: can't read file %s\n",
+ CORESIGHT_ETM_PMU_NAME, path);
+ goto out;
+ }
+
+ /*
+ * TRCIDR2.CIDSIZE, bit [9-5], indicates whether contextID tracing
+ * is supported:
+ * 0b00000 Context ID tracing is not supported.
+ * 0b00100 Maximum of 32-bit Context ID size.
+ * All other values are reserved.
+ */
+ val = BMVAL(val, 5, 9);
+ if (!val || val != 0x4) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* All good, let the kernel know */
+ evsel->core.attr.config |= (1 << ETM_OPT_CTXTID);
+ err = 0;
+
+out:
+
+ return err;
+}
+
+static int cs_etm_set_timestamp(struct auxtrace_record *itr,
+ struct evsel *evsel, int cpu)
+{
+ struct cs_etm_recording *ptr;
+ struct perf_pmu *cs_etm_pmu;
+ char path[PATH_MAX];
+ int err = -EINVAL;
+ u32 val;
+
+ ptr = container_of(itr, struct cs_etm_recording, itr);
+ cs_etm_pmu = ptr->cs_etm_pmu;
+
+ if (!cs_etm_is_etmv4(itr, cpu))
+ goto out;
+
+ /* Get a handle on TRCIRD0 */
+ snprintf(path, PATH_MAX, "cpu%d/%s",
+ cpu, metadata_etmv4_ro[CS_ETMV4_TRCIDR0]);
+ err = perf_pmu__scan_file(cs_etm_pmu, path, "%x", &val);
+
+ /* There was a problem reading the file, bailing out */
+ if (err != 1) {
+ pr_err("%s: can't read file %s\n",
+ CORESIGHT_ETM_PMU_NAME, path);
+ goto out;
+ }
+
+ /*
+ * TRCIDR0.TSSIZE, bit [28-24], indicates whether global timestamping
+ * is supported:
+ * 0b00000 Global timestamping is not implemented
+ * 0b00110 Implementation supports a maximum timestamp of 48bits.
+ * 0b01000 Implementation supports a maximum timestamp of 64bits.
+ */
+ val &= GENMASK(28, 24);
+ if (!val) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* All good, let the kernel know */
+ evsel->core.attr.config |= (1 << ETM_OPT_TS);
+ err = 0;
+
+out:
+ return err;
+}
+
+static int cs_etm_set_option(struct auxtrace_record *itr,
+ struct evsel *evsel, u32 option)
+{
+ int i, err = -EINVAL;
+ struct perf_cpu_map *event_cpus = evsel->evlist->core.cpus;
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
+
+ /* Set option of each CPU we have */
+ for (i = 0; i < cpu__max_cpu(); i++) {
+ if (!cpu_map__has(event_cpus, i) ||
+ !cpu_map__has(online_cpus, i))
+ continue;
+
+ if (option & ETM_OPT_CTXTID) {
+ err = cs_etm_set_context_id(itr, evsel, i);
+ if (err)
+ goto out;
+ }
+ if (option & ETM_OPT_TS) {
+ err = cs_etm_set_timestamp(itr, evsel, i);
+ if (err)
+ goto out;
+ }
+ if (option & ~(ETM_OPT_CTXTID | ETM_OPT_TS))
+ /* Nothing else is currently supported */
+ goto out;
+ }
+
+ err = 0;
+out:
+ perf_cpu_map__put(online_cpus);
+ return err;
+}
static int cs_etm_parse_snapshot_options(struct auxtrace_record *itr,
struct record_opts *opts,
@@ -62,29 +212,72 @@
return 0;
}
+static int cs_etm_set_sink_attr(struct perf_pmu *pmu,
+ struct evsel *evsel)
+{
+ char msg[BUFSIZ], path[PATH_MAX], *sink;
+ struct evsel_config_term *term;
+ int ret = -EINVAL;
+ u32 hash;
+
+ if (evsel->core.attr.config2 & GENMASK(31, 0))
+ return 0;
+
+ list_for_each_entry(term, &evsel->config_terms, list) {
+ if (term->type != EVSEL__CONFIG_TERM_DRV_CFG)
+ continue;
+
+ sink = term->val.str;
+ snprintf(path, PATH_MAX, "sinks/%s", sink);
+
+ ret = perf_pmu__scan_file(pmu, path, "%x", &hash);
+ if (ret != 1) {
+ pr_err("failed to set sink \"%s\" on event %s with %d (%s)\n",
+ sink, evsel__name(evsel), errno,
+ str_error_r(errno, msg, sizeof(msg)));
+ return ret;
+ }
+
+ evsel->core.attr.config2 |= hash;
+ return 0;
+ }
+
+ /*
+ * No sink was provided on the command line - allow the CoreSight
+ * system to look for a default
+ */
+ return 0;
+}
+
static int cs_etm_recording_options(struct auxtrace_record *itr,
- struct perf_evlist *evlist,
+ struct evlist *evlist,
struct record_opts *opts)
{
+ int ret;
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
- struct perf_evsel *evsel, *cs_etm_evsel = NULL;
- const struct cpu_map *cpus = evlist->cpus;
- bool privileged = (geteuid() == 0 || perf_event_paranoid() < 0);
+ struct evsel *evsel, *cs_etm_evsel = NULL;
+ struct perf_cpu_map *cpus = evlist->core.cpus;
+ bool privileged = perf_event_paranoid_check(-1);
+ int err = 0;
ptr->evlist = evlist;
ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
+ if (!record_opts__no_switch_events(opts) &&
+ perf_can_record_switch_events())
+ opts->record_switch_events = true;
+
evlist__for_each_entry(evlist, evsel) {
- if (evsel->attr.type == cs_etm_pmu->type) {
+ if (evsel->core.attr.type == cs_etm_pmu->type) {
if (cs_etm_evsel) {
pr_err("There may be only one %s event\n",
CORESIGHT_ETM_PMU_NAME);
return -EINVAL;
}
- evsel->attr.freq = 0;
- evsel->attr.sample_period = 1;
+ evsel->core.attr.freq = 0;
+ evsel->core.attr.sample_period = 1;
cs_etm_evsel = evsel;
opts->full_auxtrace = true;
}
@@ -93,6 +286,10 @@
/* no need to continue if at least one event of interest was found */
if (!cs_etm_evsel)
return 0;
+
+ ret = cs_etm_set_sink_attr(cs_etm_pmu, cs_etm_evsel);
+ if (ret)
+ return ret;
if (opts->use_clockid) {
pr_err("Cannot use clockid (-k option) with %s\n",
@@ -202,32 +399,39 @@
/*
* In the case of per-cpu mmaps, we need the CPU on the
- * AUX event.
+ * AUX event. We also need the contextID in order to be notified
+ * when a context switch happened.
*/
- if (!cpu_map__empty(cpus))
- perf_evsel__set_sample_bit(cs_etm_evsel, CPU);
+ if (!perf_cpu_map__empty(cpus)) {
+ evsel__set_sample_bit(cs_etm_evsel, CPU);
+
+ err = cs_etm_set_option(itr, cs_etm_evsel,
+ ETM_OPT_CTXTID | ETM_OPT_TS);
+ if (err)
+ goto out;
+ }
/* Add dummy event to keep tracking */
if (opts->full_auxtrace) {
- struct perf_evsel *tracking_evsel;
- int err;
+ struct evsel *tracking_evsel;
err = parse_events(evlist, "dummy:u", NULL);
if (err)
- return err;
+ goto out;
- tracking_evsel = perf_evlist__last(evlist);
+ tracking_evsel = evlist__last(evlist);
perf_evlist__set_tracking_event(evlist, tracking_evsel);
- tracking_evsel->attr.freq = 0;
- tracking_evsel->attr.sample_period = 1;
+ tracking_evsel->core.attr.freq = 0;
+ tracking_evsel->core.attr.sample_period = 1;
/* In per-cpu case, always need the time of mmap events etc */
- if (!cpu_map__empty(cpus))
- perf_evsel__set_sample_bit(tracking_evsel, TIME);
+ if (!perf_cpu_map__empty(cpus))
+ evsel__set_sample_bit(tracking_evsel, TIME);
}
- return 0;
+out:
+ return err;
}
static u64 cs_etm_get_config(struct auxtrace_record *itr)
@@ -236,11 +440,11 @@
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
- struct perf_evlist *evlist = ptr->evlist;
- struct perf_evsel *evsel;
+ struct evlist *evlist = ptr->evlist;
+ struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) {
- if (evsel->attr.type == cs_etm_pmu->type) {
+ if (evsel->core.attr.type == cs_etm_pmu->type) {
/*
* Variable perf_event_attr::config is assigned to
* ETMv3/PTM. The bit fields have been made to match
@@ -249,7 +453,7 @@
* drivers/hwtracing/coresight/coresight-perf.c for
* details.
*/
- config = evsel->attr.config;
+ config = evsel->core.attr.config;
break;
}
}
@@ -275,6 +479,8 @@
config_opts = cs_etm_get_config(itr);
if (config_opts & BIT(ETM_OPT_CYCACC))
config |= BIT(ETM4_CFG_BIT_CYCACC);
+ if (config_opts & BIT(ETM_OPT_CTXTID))
+ config |= BIT(ETM4_CFG_BIT_CTXTID);
if (config_opts & BIT(ETM_OPT_TS))
config |= BIT(ETM4_CFG_BIT_TS);
if (config_opts & BIT(ETM_OPT_RETSTK))
@@ -285,15 +491,15 @@
static size_t
cs_etm_info_priv_size(struct auxtrace_record *itr __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+ struct evlist *evlist __maybe_unused)
{
int i;
int etmv3 = 0, etmv4 = 0;
- struct cpu_map *event_cpus = evlist->cpus;
- struct cpu_map *online_cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *event_cpus = evlist->core.cpus;
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
/* cpu map is not empty, we have specific CPUs to work with */
- if (!cpu_map__empty(event_cpus)) {
+ if (!perf_cpu_map__empty(event_cpus)) {
for (i = 0; i < cpu__max_cpu(); i++) {
if (!cpu_map__has(event_cpus, i) ||
!cpu_map__has(online_cpus, i))
@@ -317,25 +523,12 @@
}
}
- cpu_map__put(online_cpus);
+ perf_cpu_map__put(online_cpus);
return (CS_ETM_HEADER_SIZE +
(etmv4 * CS_ETMV4_PRIV_SIZE) +
(etmv3 * CS_ETMV3_PRIV_SIZE));
}
-
-static const char *metadata_etmv3_ro[CS_ETM_PRIV_MAX] = {
- [CS_ETM_ETMCCER] = "mgmt/etmccer",
- [CS_ETM_ETMIDR] = "mgmt/etmidr",
-};
-
-static const char *metadata_etmv4_ro[CS_ETMV4_PRIV_MAX] = {
- [CS_ETMV4_TRCIDR0] = "trcidr/trcidr0",
- [CS_ETMV4_TRCIDR1] = "trcidr/trcidr1",
- [CS_ETMV4_TRCIDR2] = "trcidr/trcidr2",
- [CS_ETMV4_TRCIDR8] = "trcidr/trcidr8",
- [CS_ETMV4_TRCAUTHSTATUS] = "mgmt/trcauthstatus",
-};
static bool cs_etm_is_etmv4(struct auxtrace_record *itr, int cpu)
{
@@ -377,7 +570,7 @@
static void cs_etm_get_metadata(int cpu, u32 *offset,
struct auxtrace_record *itr,
- struct auxtrace_info_event *info)
+ struct perf_record_auxtrace_info *info)
{
u32 increment;
u64 magic;
@@ -442,15 +635,15 @@
static int cs_etm_info_fill(struct auxtrace_record *itr,
struct perf_session *session,
- struct auxtrace_info_event *info,
+ struct perf_record_auxtrace_info *info,
size_t priv_size)
{
int i;
u32 offset;
u64 nr_cpu, type;
- struct cpu_map *cpu_map;
- struct cpu_map *event_cpus = session->evlist->cpus;
- struct cpu_map *online_cpus = cpu_map__new(NULL);
+ struct perf_cpu_map *cpu_map;
+ struct perf_cpu_map *event_cpus = session->evlist->core.cpus;
+ struct perf_cpu_map *online_cpus = perf_cpu_map__new(NULL);
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu;
@@ -458,15 +651,15 @@
if (priv_size != cs_etm_info_priv_size(itr, session->evlist))
return -EINVAL;
- if (!session->evlist->nr_mmaps)
+ if (!session->evlist->core.nr_mmaps)
return -EINVAL;
/* If the cpu_map is empty all online CPUs are involved */
- if (cpu_map__empty(event_cpus)) {
+ if (perf_cpu_map__empty(event_cpus)) {
cpu_map = online_cpus;
} else {
/* Make sure all specified CPUs are online */
- for (i = 0; i < cpu_map__nr(event_cpus); i++) {
+ for (i = 0; i < perf_cpu_map__nr(event_cpus); i++) {
if (cpu_map__has(event_cpus, i) &&
!cpu_map__has(online_cpus, i))
return -EINVAL;
@@ -475,7 +668,7 @@
cpu_map = event_cpus;
}
- nr_cpu = cpu_map__nr(cpu_map);
+ nr_cpu = perf_cpu_map__nr(cpu_map);
/* Get PMU type as dynamically assigned by the core */
type = cs_etm_pmu->type;
@@ -492,7 +685,7 @@
if (cpu_map__has(cpu_map, i))
cs_etm_get_metadata(i, &offset, itr, info);
- cpu_map__put(online_cpus);
+ perf_cpu_map__put(online_cpus);
return 0;
}
@@ -630,11 +823,11 @@
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
- struct perf_evsel *evsel;
+ struct evsel *evsel;
evlist__for_each_entry(ptr->evlist, evsel) {
- if (evsel->attr.type == ptr->cs_etm_pmu->type)
- return perf_evsel__disable(evsel);
+ if (evsel->core.attr.type == ptr->cs_etm_pmu->type)
+ return evsel__disable(evsel);
}
return -EINVAL;
}
@@ -643,11 +836,11 @@
{
struct cs_etm_recording *ptr =
container_of(itr, struct cs_etm_recording, itr);
- struct perf_evsel *evsel;
+ struct evsel *evsel;
evlist__for_each_entry(ptr->evlist, evsel) {
- if (evsel->attr.type == ptr->cs_etm_pmu->type)
- return perf_evsel__enable(evsel);
+ if (evsel->core.attr.type == ptr->cs_etm_pmu->type)
+ return evsel__enable(evsel);
}
return -EINVAL;
}
@@ -665,21 +858,6 @@
zfree(&ptr->wrapped);
free(ptr);
-}
-
-static int cs_etm_read_finish(struct auxtrace_record *itr, int idx)
-{
- struct cs_etm_recording *ptr =
- container_of(itr, struct cs_etm_recording, itr);
- struct perf_evsel *evsel;
-
- evlist__for_each_entry(ptr->evlist, evsel) {
- if (evsel->attr.type == ptr->cs_etm_pmu->type)
- return perf_evlist__enable_event_idx(ptr->evlist,
- evsel, idx);
- }
-
- return -EINVAL;
}
struct auxtrace_record *cs_etm_record_init(int *err)
@@ -701,6 +879,7 @@
}
ptr->cs_etm_pmu = cs_etm_pmu;
+ ptr->itr.pmu = cs_etm_pmu;
ptr->itr.parse_snapshot_options = cs_etm_parse_snapshot_options;
ptr->itr.recording_options = cs_etm_recording_options;
ptr->itr.info_priv_size = cs_etm_info_priv_size;
@@ -710,61 +889,10 @@
ptr->itr.snapshot_finish = cs_etm_snapshot_finish;
ptr->itr.reference = cs_etm_reference;
ptr->itr.free = cs_etm_recording_free;
- ptr->itr.read_finish = cs_etm_read_finish;
+ ptr->itr.read_finish = auxtrace_record__read_finish;
*err = 0;
return &ptr->itr;
out:
return NULL;
-}
-
-static FILE *cs_device__open_file(const char *name)
-{
- struct stat st;
- char path[PATH_MAX];
- const char *sysfs;
-
- sysfs = sysfs__mountpoint();
- if (!sysfs)
- return NULL;
-
- snprintf(path, PATH_MAX,
- "%s" CS_BUS_DEVICE_PATH "%s", sysfs, name);
-
- if (stat(path, &st) < 0)
- return NULL;
-
- return fopen(path, "w");
-
-}
-
-static int __printf(2, 3) cs_device__print_file(const char *name, const char *fmt, ...)
-{
- va_list args;
- FILE *file;
- int ret = -EINVAL;
-
- va_start(args, fmt);
- file = cs_device__open_file(name);
- if (file) {
- ret = vfprintf(file, fmt, args);
- fclose(file);
- }
- va_end(args);
- return ret;
-}
-
-int cs_etm_set_drv_config(struct perf_evsel_config_term *term)
-{
- int ret;
- char enable_sink[ENABLE_SINK_MAX];
-
- snprintf(enable_sink, ENABLE_SINK_MAX, "%s/%s",
- term->val.drv_cfg, "enable_sink");
-
- ret = cs_device__print_file(enable_sink, "%d", 1);
- if (ret < 0)
- return ret;
-
- return 0;
}
--
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