CoreSight April 2022

coresight@lists.linaro.org

12 participants
20 discussions

[PATCH 1/3] perf test: Shell - Limit to only run executable scripts in tests

by carsten.haitzler＠foss.arm.com

From: Carsten Haitzler <carsten.haitzler(a)arm.com> Perf test's shell runner will just run everything in the tests directory (as long as it's not another directory or does not begin with a dot), but sometimes you find files in there that are not shell scripts - perf.data output for example if you do some testing and then the next time you run perf test it tries to run these. Check the files are executable so they are actually intended to be test scripts and not just some "random junk" files there. Signed-off-by: Carsten Haitzler <carsten.haitzler(a)arm.com> --- tools/perf/tests/builtin-test.c | 4 +++- tools/perf/util/path.c | 14 +++++++++++++- tools/perf/util/path.h | 1 + 3 files changed, 17 insertions(+), 2 deletions(-) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index fac3717d9ba1..3c34cb766724 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -296,7 +296,9 @@ static const char *shell_test__description(char *description, size_t size, #define for_each_shell_test(entlist, nr, base, ent) \ for (int __i = 0; __i < nr && (ent = entlist[__i]); __i++) \ - if (!is_directory(base, ent) && ent->d_name[0] != '.') + if (!is_directory(base, ent) && \ + is_executable_file(base, ent) && \ + ent->d_name[0] != '.') static const char *shell_tests__dir(char *path, size_t size) { diff --git a/tools/perf/util/path.c b/tools/perf/util/path.c index caed0336429f..ce80b79be103 100644 --- a/tools/perf/util/path.c +++ b/tools/perf/util/path.c @@ -86,9 +86,21 @@ bool is_directory(const char *base_path, const struct dirent *dent) char path[PATH_MAX]; struct stat st; - sprintf(path, "%s/%s", base_path, dent->d_name); + snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name); if (stat(path, &st)) return false; return S_ISDIR(st.st_mode); } + +bool is_executable_file(const char *base_path, const struct dirent *dent) +{ + char path[PATH_MAX]; + struct stat st; + + snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name); + if (stat(path, &st)) + return false; + + return !S_ISDIR(st.st_mode) && (st.st_mode & S_IXUSR); +} diff --git a/tools/perf/util/path.h b/tools/perf/util/path.h index 083429b7efa3..d94902c22222 100644 --- a/tools/perf/util/path.h +++ b/tools/perf/util/path.h @@ -12,5 +12,6 @@ int path__join3(char *bf, size_t size, const char *path1, const char *path2, con bool is_regular_file(const char *file); bool is_directory(const char *base_path, const struct dirent *dent); +bool is_executable_file(const char *base_path, const struct dirent *dent); #endif /* _PERF_PATH_H */ -- 2.32.0

2 years, 3 months

[PATCH v3 0/5] coresight: syscfg: Extend configfs for config load

by Mike Leach

This set extends the configfs support to allow loading and unloading of configurations as binary files via configfs. Additional attributes - load and unload are provided to in the configurations group to implement the load functionality. Routines to generate binary configuration files are supplied in ./tools/coresight. Example generator and reader applications are provided. Tools may be cross compiled or built for use on host system. Documentation is updated to describe feature usage. Changes since v2: 1) Rebased & tested oo coresight/next - 5.18-rc2 2) Moved coresight config generator and reader programs from samples to tools/coresight. Docs updated to match. (suggested by Mathieu) 3) userspace builds now use userspace headers from tools/... 4) Other minor fixes from Mathieu's review. Changes since v1: 1) Rebased to coresight/next - 5.16-rc1 with previous coresight config set applied. 2) Makefile.host fixed to default to all target. Mike Leach (5): coresight: configfs: Add in functionality for load via configfs coresight: configfs: Add in binary attributes to load files coresight: configfs: Modify config files to allow userspace use coresight: tools: Add config file write and reader tools Documentation: coresight: docs for config load via configfs .../trace/coresight/coresight-config.rst | 166 +++++- MAINTAINERS | 2 + drivers/hwtracing/coresight/Makefile | 2 +- .../coresight/coresight-config-file.c | 475 ++++++++++++++++++ .../coresight/coresight-config-file.h | 126 +++++ .../hwtracing/coresight/coresight-config.h | 27 + .../coresight/coresight-syscfg-configfs.c | 91 ++++ .../hwtracing/coresight/coresight-syscfg.c | 37 ++ .../hwtracing/coresight/coresight-syscfg.h | 2 + tools/coresight/Makefile | 51 ++ tools/coresight/coresight-cfg-bufw.c | 303 +++++++++++ tools/coresight/coresight-cfg-bufw.h | 26 + tools/coresight/coresight-cfg-example1.c | 65 +++ tools/coresight/coresight-cfg-examples.h | 27 + tools/coresight/coresight-cfg-file-read.c | 197 ++++++++ tools/coresight/coresight-cfg-filegen.c | 58 +++ tools/include/uapi/coresight-config-uapi.h | 76 +++ 17 files changed, 1724 insertions(+), 7 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-config-file.c create mode 100644 drivers/hwtracing/coresight/coresight-config-file.h create mode 100644 tools/coresight/Makefile create mode 100644 tools/coresight/coresight-cfg-bufw.c create mode 100644 tools/coresight/coresight-cfg-bufw.h create mode 100644 tools/coresight/coresight-cfg-example1.c create mode 100644 tools/coresight/coresight-cfg-examples.h create mode 100644 tools/coresight/coresight-cfg-file-read.c create mode 100644 tools/coresight/coresight-cfg-filegen.c create mode 100644 tools/include/uapi/coresight-config-uapi.h -- 2.17.1

2 years, 4 months

[PATCH 00/10] coresight: Add new API to allocate trace source ID values

by Mike Leach

The current method for allocating trace source ID values to sources is to use a fixed algorithm for CPU based sources of (cpu_num * 2 + 0x10). The STM is allocated ID 0x1. This fixed algorithm is used in both the CoreSight driver code, and by perf when writing the trace metadata in the AUXTRACE_INFO record. The method needs replacing as currently:- 1. It is inefficient in using available IDs. 2. Does not scale to larger systems with many cores and the algorithm has no limits so will generate invalid trace IDs for cpu number > 44. Additionally requirements to allocate additional system IDs on some systems have been seen. This patch set introduces an API that allows the allocation of trace IDs in a dynamic manner. Architecturally reserved IDs are never allocated, and the system is limited to allocating only valid IDs. Each of the current trace sources ETM3.x, ETM4.x and STM is updated to use the new API. perf handling is changed so that the ID associated with the CPU is read from sysfs. The ID allocator is notified when perf events start and stop so CPU based IDs are kept constant throughout any perf session. For the ETMx.x devices IDs are allocated on certain events a) When using sysfs, an ID will be allocated on hardware enable, and freed when the sysfs reset is written. b) When using perf, ID is allocated on hardware enable, and freed on hardware disable. For both cases the ID is allocated when sysfs is read to get the current trace ID. This ensures that consistent decode metadata can be extracted from the system where this read occurs before device enable. Note: This patchset breaks backward compatibility for perf record. Because the method for generating the AUXTRACE_INFO meta data has changed, using an older perf record will result in metadata that does not match the trace IDs used in the recorded trace data. This mismatch will cause subsequent decode to fail. Older versions of perf will still be able to decode data generated by the updated system. Applies to coresight/next [b54f53bc11a5] Tested on DB410c Mike Leach (10): coresight: trace-id: Add API to dynamically assign trace ID values coresight: trace-id: Set up source trace ID map for system coresight: stm: Update STM driver to use Trace ID api coresight: etm4x: Use trace ID API to dynamically allocate trace ID coresight: etm3x: Use trace ID API to allocate IDs coresight: perf: traceid: Add perf notifiers for trace ID perf: cs-etm: Update event to read trace ID from sysfs coresight: Remove legacy Trace ID allocation mechanism coresight: etmX.X: stm: Remove unused legacy source trace ID ops coresight: trace-id: Add debug & test macros to trace id allocation drivers/hwtracing/coresight/Makefile | 2 +- drivers/hwtracing/coresight/coresight-core.c | 64 ++--- .../hwtracing/coresight/coresight-etm-perf.c | 16 +- drivers/hwtracing/coresight/coresight-etm.h | 3 +- .../coresight/coresight-etm3x-core.c | 93 ++++--- .../coresight/coresight-etm3x-sysfs.c | 28 +- .../coresight/coresight-etm4x-core.c | 63 ++++- .../coresight/coresight-etm4x-sysfs.c | 32 ++- drivers/hwtracing/coresight/coresight-etm4x.h | 3 + drivers/hwtracing/coresight/coresight-priv.h | 1 + drivers/hwtracing/coresight/coresight-stm.c | 49 +--- .../hwtracing/coresight/coresight-trace-id.c | 255 ++++++++++++++++++ .../hwtracing/coresight/coresight-trace-id.h | 69 +++++ include/linux/coresight-pmu.h | 12 - include/linux/coresight.h | 3 - tools/perf/arch/arm/util/cs-etm.c | 12 +- 16 files changed, 530 insertions(+), 175 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-trace-id.c create mode 100644 drivers/hwtracing/coresight/coresight-trace-id.h -- 2.17.1

2 years, 4 months

[PATCH v5 0/2] Add support for UltraSoc System Memory Buffer

by Qi Liu

Add support for UltraSoc System Memory Buffer. Change since v4: - Add a simple document of SMB driver according to Suzuki's comment. - Address the comments from Suzuki. - https://lore.kernel.org/linux-arm-kernel/20220128061755.31909-1-liuqi115@hu… Change since v3: - Modify the file header according to community specifications. - Address the comments from Mathieu. - Link:https://lore.kernel.org/linux-arm-kernel/20211118110016.40398-1-liuqi1… Change since v2: - Move ultrasoc driver to drivers/hwtracing/coresight. - Link:https://lists.linaro.org/pipermail/coresight/2021-November/007310.html Change since v1: - Drop the document of UltraSoc according to Mathieu's comment. - Add comments to explain some private hardware settings. - Address the comments from Mathieu. - Link: https://lists.linaro.org/pipermail/coresight/2021-August/006842.html Change since RFC: - Move driver to drivers/hwtracing/coresight/ultrasoc. - Remove ultrasoc-axi-com.c, as AXI-COM doesn't need to be configured in basic tracing function. - Remove ultrasoc.c as SMB does not need to register with the ultrasoc core. - Address the comments from Mathieu and Suzuki. - Link: https://lists.linaro.org/pipermail/coresight/2021-June/006535.html Qi Liu (2): drivers/coresight: Add UltraSoc System Memory Buffer driver Documentation: Add document for UltraSoc SMB drivers .../trace/coresight/ultrasoc-smb.rst | 79 +++ drivers/hwtracing/coresight/Kconfig | 10 + drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/ultrasoc-smb.c | 643 ++++++++++++++++++ drivers/hwtracing/coresight/ultrasoc-smb.h | 106 +++ 5 files changed, 839 insertions(+) create mode 100644 Documentation/trace/coresight/ultrasoc-smb.rst create mode 100644 drivers/hwtracing/coresight/ultrasoc-smb.c create mode 100644 drivers/hwtracing/coresight/ultrasoc-smb.h -- 2.24.0

2 years, 5 months

Re: [PATCH v7 5/7] perf tool: Add support for HiSilicon PCIe Tune and Trace device driver

by Leo Yan

On Thu, Apr 07, 2022 at 08:58:39PM +0800, Yicong Yang via iommu wrote: > From: Qi Liu <liuqi115(a)huawei.com> > > 'perf record' and 'perf report --dump-raw-trace' supported in this > patch. > > Example usage: > > Output will contain raw PTT data and its textual representation, such > as: > > 0 0 0x5810 [0x30]: PERF_RECORD_AUXTRACE size: 0x400000 offset: 0 > ref: 0xa5d50c725 idx: 0 tid: -1 cpu: 0 > . > . ... HISI PTT data: size 4194304 bytes > . 00000000: 00 00 00 00 Prefix > . 00000004: 08 20 00 60 Header DW0 > . 00000008: ff 02 00 01 Header DW1 > . 0000000c: 20 08 00 00 Header DW2 > . 00000010: 10 e7 44 ab Header DW3 > . 00000014: 2a a8 1e 01 Time > . 00000020: 00 00 00 00 Prefix > . 00000024: 01 00 00 60 Header DW0 > . 00000028: 0f 1e 00 01 Header DW1 > . 0000002c: 04 00 00 00 Header DW2 > . 00000030: 40 00 81 02 Header DW3 > . 00000034: ee 02 00 00 Time > .... > > Signed-off-by: Qi Liu <liuqi115(a)huawei.com> > Signed-off-by: Yicong Yang <yangyicong(a)hisilicon.com> > --- > tools/perf/arch/arm/util/auxtrace.c | 76 +++++- > tools/perf/arch/arm/util/pmu.c | 3 + > tools/perf/arch/arm64/util/Build | 2 +- > tools/perf/arch/arm64/util/hisi_ptt.c | 195 ++++++++++++++++ > tools/perf/util/Build | 2 + > tools/perf/util/auxtrace.c | 4 + > tools/perf/util/auxtrace.h | 1 + > tools/perf/util/hisi-ptt-decoder/Build | 1 + > .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.c | 170 ++++++++++++++ > .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.h | 28 +++ > tools/perf/util/hisi_ptt.c | 218 ++++++++++++++++++ > tools/perf/util/hisi_ptt.h | 28 +++ It's good to divide the big patch into smaller patches, e.g. one patch is to add PTT auxtrace (so mainly for perf record), and the second patch is to add PTT decoder for perf decoding. > 12 files changed, 724 insertions(+), 4 deletions(-) > create mode 100644 tools/perf/arch/arm64/util/hisi_ptt.c > create mode 100644 tools/perf/util/hisi-ptt-decoder/Build > create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c > create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h > create mode 100644 tools/perf/util/hisi_ptt.c > create mode 100644 tools/perf/util/hisi_ptt.h > > diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c > index 5fc6a2a3dbc5..393f5757c039 100644 > --- a/tools/perf/arch/arm/util/auxtrace.c > +++ b/tools/perf/arch/arm/util/auxtrace.c > @@ -4,9 +4,11 @@ > * Author: Mathieu Poirier <mathieu.poirier(a)linaro.org> > */ > > +#include <dirent.h> > #include <stdbool.h> > #include <linux/coresight-pmu.h> > #include <linux/zalloc.h> > +#include <api/fs/fs.h> > > #include "../../../util/auxtrace.h" > #include "../../../util/debug.h" > @@ -14,6 +16,7 @@ > #include "../../../util/pmu.h" > #include "cs-etm.h" > #include "arm-spe.h" > +#include "hisi_ptt.h" > > static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > { > @@ -50,6 +53,58 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err) > return arm_spe_pmus; > } > > +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err) > +{ > + const char *sysfs = sysfs__mountpoint(); > + struct perf_pmu **hisi_ptt_pmus = NULL; > + struct dirent *dent; > + char path[PATH_MAX]; > + DIR *dir = NULL; > + int idx = 0; > + > + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs); > + dir = opendir(path); > + if (!dir) { > + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH); > + *err = -EINVAL; > + goto out; > + } > + > + while ((dent = readdir(dir))) { > + if (strstr(dent->d_name, HISI_PTT_PMU_NAME)) > + (*nr_ptts)++; > + } > + > + if (!(*nr_ptts)) > + goto out; > + > + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts)); > + if (!hisi_ptt_pmus) { > + pr_err("hisi_ptt alloc failed\n"); > + *err = -ENOMEM; > + goto out; > + } > + > + rewinddir(dir); > + while ((dent = readdir(dir))) { > + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) { > + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name); > + if (hisi_ptt_pmus[idx]) { > + pr_debug2("%s %d: hisi_ptt_pmu %d type %d name %s\n", > + __func__, __LINE__, idx, > + hisi_ptt_pmus[idx]->type, > + hisi_ptt_pmus[idx]->name); > + idx++; Indentation for "idx++" is not right. > + } > + Redundant new line. > + } > + } > + > +out: > + closedir(dir); > + return hisi_ptt_pmus; > +} > + > struct auxtrace_record > *auxtrace_record__init(struct evlist *evlist, int *err) > { > @@ -57,8 +112,12 @@ struct auxtrace_record > struct evsel *evsel; > bool found_etm = false; > struct perf_pmu *found_spe = NULL; > + struct perf_pmu *found_ptt = NULL; > struct perf_pmu **arm_spe_pmus = NULL; > + struct perf_pmu **hisi_ptt_pmus = NULL; > + > int nr_spes = 0; > + int nr_ptts = 0; > int i = 0; > > if (!evlist) > @@ -66,13 +125,14 @@ struct auxtrace_record > > cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME); > arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err); > + hisi_ptt_pmus = find_all_hisi_ptt_pmus(&nr_ptts, err); > > evlist__for_each_entry(evlist, evsel) { > if (cs_etm_pmu && > evsel->core.attr.type == cs_etm_pmu->type) > found_etm = true; > > - if (!nr_spes || found_spe) > + if ((!nr_spes || found_spe) && (!nr_ptts || found_ptt)) > continue; > > for (i = 0; i < nr_spes; i++) { > @@ -81,11 +141,18 @@ struct auxtrace_record > break; > } > } > + > + for (i = 0; i < nr_ptts; i++) { > + if (evsel->core.attr.type == hisi_ptt_pmus[i]->type) { > + found_ptt = hisi_ptt_pmus[i]; > + break; > + } > + } > } For the loop of evlist__for_each_entry, it's good to refactor the event list iteration, we can refine code like below: static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus, int pmu_nr, struct evsel *evsel) { int i; struct perf_pmu *found = NULL; if (!pmus) return NULL; for (i = 0; i < pmu_nr; i++) { if (evsel->core.attr.type == pmus[i]->type) { found = pmus[i]; break; } } return found; } struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, int *err) { ... evlist__for_each_entry(evlist, evsel) { if (cs_etm_pmu && !found_etm) found_etm = find_pmu_for_event(&cs_etm_pmu, 1, evsel); if (arm_spe_pmus && !found_spe) found_etm = find_pmu_for_event(arm_spe_pmus, nr_spe, evsel); if (hisi_ptt_pmus && !found_ptt) found_ptt = find_pmu_for_event(hisi_ptt_pmus, nr_ptt, evsel); } ... Please use a separate patch for the refactoring, and then based on it you could add PTT PMU related finding code. } > free(arm_spe_pmus); Add: free(hisi_ptt_pmus); to avoid memory leaking. > > - if (found_etm && found_spe) { > - pr_err("Concurrent ARM Coresight ETM and SPE operation not currently supported\n"); > + if (found_etm && found_spe && found_ptt) { This logic is not right; actually we want the logic is: int auxtrace_event_cnt = 0; if (found_etm) auxtrace_event_cnt++; if (found_spe) auxtrace_event_cnt++; if (found_ptt) auxtrace_event_cnt++; if (auxtrace_event_cnt > 1) { pr_err("Concurrent AUX trace operation isn't supported: found etm %d spe %d ptt %d\n", found_etm, found_spe, found_ptt); *err = -EOPNOTSUPP; return NULL; } > + pr_err("Concurrent ARM Coresight ETM ,SPE and HiSilicon PCIe Trace operation not currently supported\n"); > *err = -EOPNOTSUPP; > return NULL; > } > @@ -96,6 +163,9 @@ struct auxtrace_record > #if defined(__aarch64__) > if (found_spe) > return arm_spe_recording_init(err, found_spe); > + > + if (found_ptt) > + return hisi_ptt_recording_init(err, found_ptt); > #endif > > /* > diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c > index b8b23b9dc598..89a3cedb4557 100644 > --- a/tools/perf/arch/arm/util/pmu.c > +++ b/tools/perf/arch/arm/util/pmu.c > @@ -10,6 +10,7 @@ > #include <linux/string.h> > > #include "arm-spe.h" > +#include "hisi_ptt.h" > #include "../../../util/pmu.h" > > struct perf_event_attr > @@ -22,6 +23,8 @@ struct perf_event_attr > #if defined(__aarch64__) > } else if (strstarts(pmu->name, ARM_SPE_PMU_NAME)) { > return arm_spe_pmu_default_config(pmu); > + } else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) { > + pmu->selectable = true; > #endif > } > > diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build > index 9fcb4e68add9..8b7fd1dc9f37 100644 > --- a/tools/perf/arch/arm64/util/Build > +++ b/tools/perf/arch/arm64/util/Build > @@ -11,4 +11,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o > perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \ > ../../arm/util/auxtrace.o \ > ../../arm/util/cs-etm.o \ > - arm-spe.o mem-events.o > + arm-spe.o mem-events.o hisi_ptt.o > diff --git a/tools/perf/arch/arm64/util/hisi_ptt.c b/tools/perf/arch/arm64/util/hisi_ptt.c > new file mode 100644 > index 000000000000..de3a3523ffd5 > --- /dev/null > +++ b/tools/perf/arch/arm64/util/hisi_ptt.c > @@ -0,0 +1,195 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#include <linux/kernel.h> > +#include <linux/types.h> > +#include <linux/bitops.h> > +#include <linux/log2.h> > +#include <linux/zalloc.h> > +#include <time.h> > + > +#include <internal/lib.h> // page_size > +#include "../../../util/auxtrace.h" > +#include "../../../util/cpumap.h" > +#include "../../../util/debug.h" > +#include "../../../util/event.h" > +#include "../../../util/evlist.h" > +#include "../../../util/evsel.h" > +#include "../../../util/hisi_ptt.h" > +#include "../../../util/pmu.h" > +#include "../../../util/record.h" > +#include "../../../util/session.h" > +#include "../../../util/tsc.h" > + > +#define DEFAULT_PAGE_SIZE 1024 It's a bit confusion to define PAGE_SIZE as 1024. Here can simply define: #define KiB(x) ((x) * 1024) > +#define KiB(x) ((x) * DEFAULT_PAGE_SIZE) > +#define MiB(x) ((x) * DEFAULT_PAGE_SIZE * DEFAULT_PAGE_SIZE) > + > +struct hisi_ptt_recording { > + struct auxtrace_record itr; > + struct perf_pmu *hisi_ptt_pmu; > + struct evlist *evlist; > +}; > + > +static size_t > +hisi_ptt_info_priv_size(struct auxtrace_record *itr __maybe_unused, > + struct evlist *evlist __maybe_unused) > +{ > + return HISI_PTT_AUXTRACE_PRIV_SIZE; > +} > + > +static int hisi_ptt_info_fill(struct auxtrace_record *itr, > + struct perf_session *session, > + struct perf_record_auxtrace_info *auxtrace_info, > + size_t priv_size) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; > + > + if (priv_size != HISI_PTT_AUXTRACE_PRIV_SIZE) > + return -EINVAL; > + > + if (!session->evlist->core.nr_mmaps) > + return -EINVAL; > + > + auxtrace_info->type = PERF_AUXTRACE_HISI_PTT; > + auxtrace_info->priv[HISI_PTT_PMU_TYPE] = hisi_ptt_pmu->type; > + > + return 0; > +} > + > +static int hisi_ptt_set_auxtrace_mmap_page(struct record_opts *opts) > +{ > + bool privileged = perf_event_paranoid_check(-1); > + > + if (!opts->full_auxtrace) > + return 0; > + > + if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) { > + if (privileged) { > + opts->auxtrace_mmap_pages = MiB(16) / page_size; > + } else { > + opts->auxtrace_mmap_pages = KiB(128) / page_size; > + if (opts->mmap_pages == UINT_MAX) > + opts->mmap_pages = KiB(256) / page_size; > + } > + } > + > + /* Validate auxtrace_mmap_pages */ > + if (opts->auxtrace_mmap_pages) { > + size_t sz = opts->auxtrace_mmap_pages * (size_t)page_size; > + size_t min_sz = KiB(8); > + > + if (sz < min_sz || !is_power_of_2(sz)) { > + pr_err("Invalid mmap size for HISI PTT: must be at least %zuKiB and a power of 2\n", > + min_sz / DEFAULT_PAGE_SIZE); > + return -EINVAL; > + } > + } > + > + return 0; > +} > + > +static int hisi_ptt_recording_options(struct auxtrace_record *itr, > + struct evlist *evlist, > + struct record_opts *opts) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + struct perf_pmu *hisi_ptt_pmu = pttr->hisi_ptt_pmu; > + struct perf_cpu_map *cpus = evlist->core.cpus; > + struct evsel *evsel, *hisi_ptt_evsel = NULL; > + struct evsel *tracking_evsel; > + int err; > + > + pttr->evlist = evlist; > + evlist__for_each_entry(evlist, evsel) { > + if (evsel->core.attr.type == hisi_ptt_pmu->type) { > + if (hisi_ptt_evsel) { > + pr_err("There may be only one " HISI_PTT_PMU_NAME "x event\n"); > + return -EINVAL; > + } > + evsel->core.attr.freq = 0; > + evsel->core.attr.sample_period = 1; > + hisi_ptt_evsel = evsel; > + opts->full_auxtrace = true; > + } > + } > + > + err = hisi_ptt_set_auxtrace_mmap_page(opts); > + if (err) > + return err; > + /* > + * To obtain the auxtrace buffer file descriptor, the auxtrace event > + * must come first. > + */ > + evlist__to_front(evlist, hisi_ptt_evsel); > + > + if (!perf_cpu_map__empty(cpus)) { > + evsel__set_sample_bit(hisi_ptt_evsel, TIME); > + evsel__set_sample_bit(hisi_ptt_evsel, CPU); It needs to set CPU bit in sample type for per-cpu mmaps. IIUC, PTT is only used for system wide tracing? If so, you don't need set CPU bit. To be honest, I am also confused set the sample bits. Actually, there have two different sample types for AUX trace, one is here set the sample type for AUX event, and in PTT decoding code it needs to set sample type for synthesized samples. > + } > + > + /* Add dummy event to keep tracking */ > + err = parse_events(evlist, "dummy:u", NULL); > + if (err) > + return err; > + > + tracking_evsel = evlist__last(evlist); > + evlist__set_tracking_event(evlist, tracking_evsel); > + > + tracking_evsel->core.attr.freq = 0; > + tracking_evsel->core.attr.sample_period = 1; > + > + if (!perf_cpu_map__empty(cpus)) > + evsel__set_sample_bit(tracking_evsel, TIME); > + > + return 0; > +} > + > +static u64 hisi_ptt_reference(struct auxtrace_record *itr __maybe_unused) > +{ > + return rdtsc(); > +} > > + > +static void hisi_ptt_recording_free(struct auxtrace_record *itr) > +{ > + struct hisi_ptt_recording *pttr = > + container_of(itr, struct hisi_ptt_recording, itr); > + > + free(pttr); > +} > + > +struct auxtrace_record *hisi_ptt_recording_init(int *err, > + struct perf_pmu *hisi_ptt_pmu) > +{ > + struct hisi_ptt_recording *pttr; > + > + if (!hisi_ptt_pmu) { > + *err = -ENODEV; > + return NULL; > + } > + > + pttr = zalloc(sizeof(struct hisi_ptt_recording)); > + if (!pttr) { > + *err = -ENOMEM; > + return NULL; > + } > + > + pttr->hisi_ptt_pmu = hisi_ptt_pmu; > + pttr->itr.pmu = hisi_ptt_pmu; > + pttr->itr.recording_options = hisi_ptt_recording_options; > + pttr->itr.info_priv_size = hisi_ptt_info_priv_size; > + pttr->itr.info_fill = hisi_ptt_info_fill; > + pttr->itr.free = hisi_ptt_recording_free; > + pttr->itr.reference = hisi_ptt_reference; > + pttr->itr.read_finish = auxtrace_record__read_finish; > + pttr->itr.alignment = 0; > + > + *err = 0; > + return &pttr->itr; > +} > diff --git a/tools/perf/util/Build b/tools/perf/util/Build > index 9a7209a99e16..95d2d76c52da 100644 > --- a/tools/perf/util/Build > +++ b/tools/perf/util/Build > @@ -116,6 +116,8 @@ perf-$(CONFIG_AUXTRACE) += intel-pt.o > perf-$(CONFIG_AUXTRACE) += intel-bts.o > perf-$(CONFIG_AUXTRACE) += arm-spe.o > perf-$(CONFIG_AUXTRACE) += arm-spe-decoder/ > +perf-$(CONFIG_AUXTRACE) += hisi_ptt.o > +perf-$(CONFIG_AUXTRACE) += hisi-ptt-decoder/ > perf-$(CONFIG_AUXTRACE) += s390-cpumsf.o > > ifdef CONFIG_LIBOPENCSD > diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c > index df1c5bbbaa0d..f4841ebaf314 100644 > --- a/tools/perf/util/auxtrace.c > +++ b/tools/perf/util/auxtrace.c > @@ -51,6 +51,7 @@ > #include "intel-pt.h" > #include "intel-bts.h" > #include "arm-spe.h" > +#include "hisi_ptt.h" > #include "s390-cpumsf.h" > #include "util/mmap.h" > > @@ -1281,6 +1282,9 @@ int perf_event__process_auxtrace_info(struct perf_session *session, > case PERF_AUXTRACE_S390_CPUMSF: > err = s390_cpumsf_process_auxtrace_info(event, session); > break; > + case PERF_AUXTRACE_HISI_PTT: > + err = hisi_ptt_process_auxtrace_info(event, session); > + break; > case PERF_AUXTRACE_UNKNOWN: > default: > return -EINVAL; > diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h > index dc38b6f57232..3858c5752ead 100644 > --- a/tools/perf/util/auxtrace.h > +++ b/tools/perf/util/auxtrace.h > @@ -48,6 +48,7 @@ enum auxtrace_type { > PERF_AUXTRACE_CS_ETM, > PERF_AUXTRACE_ARM_SPE, > PERF_AUXTRACE_S390_CPUMSF, > + PERF_AUXTRACE_HISI_PTT, > }; > > enum itrace_period_type { > diff --git a/tools/perf/util/hisi-ptt-decoder/Build b/tools/perf/util/hisi-ptt-decoder/Build > new file mode 100644 > index 000000000000..db3db8b75033 > --- /dev/null > +++ b/tools/perf/util/hisi-ptt-decoder/Build > @@ -0,0 +1 @@ > +perf-$(CONFIG_AUXTRACE) += hisi-ptt-pkt-decoder.o > diff --git a/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c b/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c > new file mode 100644 > index 000000000000..3fb7a6949209 > --- /dev/null > +++ b/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c > @@ -0,0 +1,170 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#include <stdlib.h> > +#include <stdio.h> > +#include <string.h> > +#include <endian.h> > +#include <byteswap.h> > +#include <linux/bitops.h> > +#include <stdarg.h> > + > +#include "../color.h" > +#include "hisi-ptt-pkt-decoder.h" > + > +/* > + * For 8DW format, the bit[31:11] of DW0 is always 0x1fffff, which can be > + * used to distinguish the data format. > + * 8DW format is like: > + * bits [ 31:11 ][ 10:0 ] > + * |---------------------------------------|-------------------| > + * DW0 [ 0x1fffff ][ Reserved (0x7ff) ] > + * DW1 [ Prefix ] > + * DW2 [ Header DW0 ] > + * DW3 [ Header DW1 ] > + * DW4 [ Header DW2 ] > + * DW5 [ Header DW3 ] > + * DW6 [ Reserved (0x0) ] > + * DW7 [ Time ] > + * > + * 4DW format is like: > + * bits [31:30] [ 29:25 ][24][23][22][21][ 20:11 ][ 10:0 ] > + * |-----|---------|---|---|---|---|-------------|-------------| > + * DW0 [ Fmt ][ Type ][T9][T8][TH][SO][ Length ][ Time ] > + * DW1 [ Header DW1 ] > + * DW2 [ Header DW2 ] > + * DW3 [ Header DW3 ] > + */ > + > +enum hisi_ptt_8dw_pkt_field_type { > + HISI_PTT_8DW_PREFIX, > + HISI_PTT_8DW_HEAD0, > + HISI_PTT_8DW_HEAD1, > + HISI_PTT_8DW_HEAD2, > + HISI_PTT_8DW_HEAD3, > + HISI_PTT_8DW_TIME, > + HISI_PTT_8DW_TYPE_MAX > +}; > + > +enum hisi_ptt_4dw_pkt_field_type { > + HISI_PTT_4DW_HEAD1, > + HISI_PTT_4DW_HEAD2, > + HISI_PTT_4DW_HEAD3, > + HISI_PTT_4DW_TYPE_MAX > +}; > + > +static const char * const hisi_ptt_8dw_pkt_field_name[] = { > + [HISI_PTT_8DW_PREFIX] = "Prefix", > + [HISI_PTT_8DW_HEAD0] = "Header DW0", > + [HISI_PTT_8DW_HEAD1] = "Header DW1", > + [HISI_PTT_8DW_HEAD2] = "Header DW2", > + [HISI_PTT_8DW_HEAD3] = "Header DW3", > + [HISI_PTT_8DW_TIME] = "Time", > +}; > + > +static const char * const hisi_ptt_4dw_pkt_field_name[] = { > + [HISI_PTT_4DW_HEAD1] = "Header DW1", > + [HISI_PTT_4DW_HEAD2] = "Header DW2", > + [HISI_PTT_4DW_HEAD3] = "Header DW3", > +}; > + > +/* offset of each member is determined by format of 8dw packet. */ > +static uint32_t hisi_ptt_8dw_pkt_field_offset[] = { > + [HISI_PTT_8DW_PREFIX] = 4, > + [HISI_PTT_8DW_HEAD0] = 4, > + [HISI_PTT_8DW_HEAD1] = 4, > + [HISI_PTT_8DW_HEAD2] = 4, > + [HISI_PTT_8DW_HEAD3] = 4, > + [HISI_PTT_8DW_TIME] = 8, > +}; You could define a structure hisi_ptt_8dw (just like hisi_ptt_4dw) so that can avoid to define this field offset structure. It's unusal to define data structure for offset, another way is to define macros for offset values. > + > +union hisi_ptt_4dw { > + struct { > + uint32_t format : 2; > + uint32_t type : 5; > + uint32_t t9 : 1; > + uint32_t t8 : 1; > + uint32_t th : 1; > + uint32_t so : 1; > + uint32_t len : 10; > + uint32_t time : 11; > + }; > + uint32_t value; > +}; > + > +static void hisi_ptt_print_pkt(const unsigned char *buf, int *pos, const char *desc) > +{ > + const char *color = PERF_COLOR_BLUE; > + int field_len = sizeof(uint32_t); > + int i; > + > + printf("."); > + color_fprintf(stdout, color, " %08x: ", *pos); > + for (i = 0; i < field_len; i++) > + color_fprintf(stdout, color, "%02x ", buf[i]); > + for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++) > + color_fprintf(stdout, color, " "); > + color_fprintf(stdout, color, " %s\n", desc); > + *pos += field_len; > +} > + > +static int hisi_ptt_8dw_kpt_desc(const unsigned char *buf, int pos) > +{ > + int i; > + > + for (i = HISI_PTT_8DW_PREFIX; i < HISI_PTT_8DW_TYPE_MAX; i++) { > + buf += hisi_ptt_8dw_pkt_field_offset[i]; > + hisi_ptt_print_pkt(buf, &pos, hisi_ptt_8dw_pkt_field_name[i]); > + } > + > + return HISI_PTT_8DW_PKT_SIZE; > +} > + > +static void hisi_ptt_4dw_print_dw0(const unsigned char *buf, int *pos) > +{ > + const char *color = PERF_COLOR_BLUE; > + int field_len = sizeof(uint32_t); > + union hisi_ptt_4dw dw0; > + int i; > + > + dw0.value = *(uint32_t *)buf; > + printf("."); > + color_fprintf(stdout, color, " %08x: ", *pos); > + for (i = 0; i < field_len; i++) > + color_fprintf(stdout, color, "%02x ", buf[i]); > + for (i = 0; i < HISI_PTT_MAX_SPACE_LEN; i++) > + color_fprintf(stdout, color, " "); > + > + color_fprintf(stdout, color, > + " %s %x %s %x %s %x %s %x %s %x %s %x %s %x %s %x\n", > + "Format", dw0.format, "Type", dw0.type, "T9", dw0.t9, > + "T8", dw0.t8, "TH", dw0.th, "SO", dw0.so, "Length", > + dw0.len, "Time", dw0.time); > + > + *pos += field_len; > +} > + > +static int hisi_ptt_4dw_kpt_desc(const unsigned char *buf, int pos) > +{ > + int i; > + > + hisi_ptt_4dw_print_dw0(buf, &pos); > + > + for (i = HISI_PTT_4DW_HEAD1; i < HISI_PTT_4DW_TYPE_MAX; i++) { > + buf += sizeof(uint32_t); > + hisi_ptt_print_pkt(buf, &pos, hisi_ptt_4dw_pkt_field_name[i]); > + } > + > + return HISI_PTT_4DW_PKT_SIZE; > +} > + > +int hisi_ptt_pkt_desc(const unsigned char *buf, int pos, enum hisi_ptt_pkt_type type) > +{ > + if (type == HISI_PTT_8DW_PKT) > + return hisi_ptt_8dw_kpt_desc(buf, pos); > + > + return hisi_ptt_4dw_kpt_desc(buf, pos); > +} > diff --git a/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h b/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h > new file mode 100644 > index 000000000000..20c51f230cac > --- /dev/null > +++ b/tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h > @@ -0,0 +1,28 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#ifndef INCLUDE__HISI_PTT_PKT_DECODER_H__ > +#define INCLUDE__HISI_PTT_PKT_DECODER_H__ > + > +#include <stddef.h> > +#include <stdint.h> > + > +#define HISI_PTT_PKT_DESC_MAX 256 > +#define HISI_PTT_NEED_MORE_BYTES -1 > +#define HISI_PTT_8DW_CHECK_MASK GENMASK(31, 11) > +#define HISI_PTT_IS_8DW_PKT GENMASK(31, 11) > +#define HISI_PTT_8DW_PKT_SIZE 32 > +#define HISI_PTT_4DW_PKT_SIZE 16 > +#define HISI_PTT_MAX_SPACE_LEN 10 > + > +enum hisi_ptt_pkt_type { > + HISI_PTT_4DW_PKT, > + HISI_PTT_8DW_PKT, > +}; > + > +int hisi_ptt_pkt_desc(const unsigned char *buf, int pos, enum hisi_ptt_pkt_type type); > + > +#endif > diff --git a/tools/perf/util/hisi_ptt.c b/tools/perf/util/hisi_ptt.c > new file mode 100644 > index 000000000000..e2934214763c > --- /dev/null > +++ b/tools/perf/util/hisi_ptt.c > @@ -0,0 +1,218 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#include <byteswap.h> > +#include <endian.h> > +#include <errno.h> > +#include <inttypes.h> > +#include <linux/bitops.h> > +#include <linux/kernel.h> > +#include <linux/log2.h> > +#include <linux/types.h> > +#include <linux/zalloc.h> > +#include <stdlib.h> > +#include <unistd.h> > + > +#include "auxtrace.h" > +#include "color.h" > +#include "debug.h" > +#include "evlist.h" > +#include "evsel.h" > +#include "hisi_ptt.h" > +#include "hisi-ptt-decoder/hisi-ptt-pkt-decoder.h" > +#include "machine.h" > +#include "session.h" > +#include "symbol.h" > +#include "tool.h" > +#include "util/synthetic-events.h" > + > +struct hisi_ptt { > + struct auxtrace auxtrace; > + struct auxtrace_queues queues; > + u32 auxtrace_type; > + struct perf_session *session; > + struct machine *machine; > + u32 pmu_type; > +}; > + > +struct hisi_ptt_queue { > + struct hisi_ptt *ptt; > + struct auxtrace_buffer *buffer; > +}; > + > +static enum hisi_ptt_pkt_type hisi_ptt_check_packet_type(unsigned char *buf) > +{ > + uint32_t head = *(uint32_t *)buf; > + > + if ((HISI_PTT_8DW_CHECK_MASK & head) == HISI_PTT_IS_8DW_PKT) > + return HISI_PTT_8DW_PKT; > + > + return HISI_PTT_4DW_PKT; > +} > + > +static void hisi_ptt_dump(struct hisi_ptt *ptt __maybe_unused, > + unsigned char *buf, size_t len) > +{ > + const char *color = PERF_COLOR_BLUE; > + enum hisi_ptt_pkt_type type; > + size_t pos = 0; > + int pkt_len; > + > + color_fprintf(stdout, color, ". ... HISI PTT data: size %zu bytes\n", > + len); > + > + type = hisi_ptt_check_packet_type(buf); > + while (len) { It's good to use condition "while (len > 0)". > + pkt_len = hisi_ptt_pkt_desc(buf, pos, type); > + if (!pkt_len) > + color_fprintf(stdout, color, " Bad packet!\n"); > + > + pos += pkt_len; > + buf += pkt_len; > + len -= pkt_len; > + } > +} > + > +static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf, > + size_t len) > +{ > + printf(".\n"); > + > + hisi_ptt_dump(ptt, buf, len); > +} > + > +static int hisi_ptt_process_event(struct perf_session *session __maybe_unused, > + union perf_event *event __maybe_unused, > + struct perf_sample *sample __maybe_unused, > + struct perf_tool *tool __maybe_unused) > +{ > + return 0; > +} > + > +static int hisi_ptt_process_auxtrace_event(struct perf_session *session, > + union perf_event *event, > + struct perf_tool *tool __maybe_unused) > +{ > + struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, > + auxtrace); > + struct auxtrace_buffer *buffer; > + off_t data_offset; > + int fd = perf_data__fd(session->data); > + int err; > + > + if (perf_data__is_pipe(session->data)) { > + data_offset = 0; > + } else { > + data_offset = lseek(fd, 0, SEEK_CUR); > + if (data_offset == -1) > + return -errno; > + } > + > + err = auxtrace_queues__add_event(&ptt->queues, session, event, > + data_offset, &buffer); > + if (err) > + return err; > + > + if (dump_trace) { > + if (auxtrace_buffer__get_data(buffer, fd)) { > + hisi_ptt_dump_event(ptt, buffer->data, buffer->size); > + auxtrace_buffer__put_data(buffer); > + } > + } > + > + return 0; > +} > + > +static int hisi_ptt_flush(struct perf_session *session __maybe_unused, > + struct perf_tool *tool __maybe_unused) > +{ > + return 0; > +} > + > +static void hisi_ptt_free_events(struct perf_session *session) > +{ > + struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, > + auxtrace); > + struct auxtrace_queues *queues = &ptt->queues; > + unsigned int i; > + > + for (i = 0; i < queues->nr_queues; i++) { > + free(queues->queue_array[i].priv); > + queues->queue_array[i].priv = NULL; > + } > + auxtrace_queues__free(queues); > +} > + > +static void hisi_ptt_free(struct perf_session *session) > +{ > + struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, > + auxtrace); > + > + hisi_ptt_free_events(session); > + session->auxtrace = NULL; > + free(ptt); > +} > + > +static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session, > + struct evsel *evsel) > +{ > + struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace); > + > + return evsel->core.attr.type == ptt->pmu_type; > +} > + > +static const char * const hisi_ptt_info_fmts[] = { > + [HISI_PTT_PMU_TYPE] = " PMU Type %" PRId64 "\n", > +}; > + > +static void hisi_ptt_print_info(__u64 *arr) > +{ > + if (!dump_trace) > + return; > + > + fprintf(stdout, hisi_ptt_info_fmts[HISI_PTT_PMU_TYPE], arr[HISI_PTT_PMU_TYPE]); > +} > + > +int hisi_ptt_process_auxtrace_info(union perf_event *event, > + struct perf_session *session) > +{ > + struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; > + struct hisi_ptt *ptt; > + int err; > + > + if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE + > + sizeof(struct perf_record_auxtrace_info)) > + return -EINVAL; > + > + ptt = zalloc(sizeof(struct hisi_ptt)); > + if (!ptt) > + return -ENOMEM; > + > + err = auxtrace_queues__init(&ptt->queues); > + if (err) > + goto err_free; > + > + ptt->session = session; > + ptt->machine = &session->machines.host; /* No kvm support */ > + ptt->auxtrace_type = auxtrace_info->type; > + ptt->pmu_type = auxtrace_info->priv[HISI_PTT_PMU_TYPE]; > + > + ptt->auxtrace.process_event = hisi_ptt_process_event; > + ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event; > + ptt->auxtrace.flush_events = hisi_ptt_flush; > + ptt->auxtrace.free_events = hisi_ptt_free_events; > + ptt->auxtrace.free = hisi_ptt_free; > + ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace; > + session->auxtrace = &ptt->auxtrace; > + > + hisi_ptt_print_info(&auxtrace_info->priv[0]); > + > + return 0; > + > +err_free: > + free(ptt); > + return err; > +} > diff --git a/tools/perf/util/hisi_ptt.h b/tools/perf/util/hisi_ptt.h > new file mode 100644 > index 000000000000..c0b6cbde1221 > --- /dev/null > +++ b/tools/perf/util/hisi_ptt.h > @@ -0,0 +1,28 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * HiSilicon PCIe Trace and Tuning (PTT) support > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + */ > + > +#ifndef INCLUDE__PERF_HISI_PTT_H__ > +#define INCLUDE__PERF_HISI_PTT_H__ > + > +#define HISI_PTT_PMU_NAME "hisi_ptt" > +enum { > + HISI_PTT_PMU_TYPE, > + HISI_PTT_PER_CPU_MMAPS, HISI_PTT_PER_CPU_MMAPS is not used, so can remove it. Thanks, Leo > + HISI_PTT_AUXTRACE_PRIV_MAX, > +}; > + > +#define HISI_PTT_AUXTRACE_PRIV_SIZE (HISI_PTT_AUXTRACE_PRIV_MAX * sizeof(u64)) > +union perf_event; > +struct perf_session; > +struct perf_pmu; > + > +struct auxtrace_record *hisi_ptt_recording_init(int *err, > + struct perf_pmu *hisi_ptt_pmu); > + > +int hisi_ptt_process_auxtrace_info(union perf_event *event, > + struct perf_session *session); > + > +#endif > -- > 2.24.0 > > _______________________________________________ > iommu mailing list > iommu(a)lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu

2 years, 5 months

Re: [PATCH v3] coresight: core: Fix coresight device probe failure issue

by Suzuki K Poulose

Hi Jinlong On 09/03/2022 14:22, Mao Jinlong wrote: > It is possibe that probe failure issue happens when the device > and its child_device's probe happens at the same time. > In coresight_make_links, has_conns_grp is true for parent, but > has_conns_grp is false for child device as has_conns_grp is set > to true in coresight_create_conns_sysfs_group. The probe of parent > device will fail at this condition. Add has_conns_grp check for > child device before make the links and make the process from > device_register to connection_create be atomic to avoid this > probe failure issue. > > Suggested-by: Suzuki K Poulose <suzuki.poulose(a)arm.com> > Suggested-by: Mike Leach <mike.leach(a)linaro.org> > Signed-off-by: Mao Jinlong <quic_jinlmao(a)quicinc.com> Thanks for the rework. The patch looks good to me. Suzuki

2 years, 5 months

[PATCH v2 0/6] coresight: Add config flag to enable branch broadcast

by James Clark

This allows enabling branch broadcast for Perf hosted sessions (the option is currently only available for the sysfs interface). Hopefully this could be useful for testing the decode in perf, for example does a determinisitic run with branch broadcast enabled look the same as with it disabled? It could also be used for scenarios like OpenJ9's support for JIT code: java -Xjit:perfTool hello.java Currently this is not working and you get the usual errors of a missing DSO, but branch broadcast would have to be enabled anyway before working through this next issue: CS ETM Trace: Debug data not found for address 0xffff7b94b058 in /tmp/perf-29360.map Address range support in Perf for branch broadcast has also not been added here, but could be added later. The documentation has been refactored slightly to allow updates to be made that link the Perf format arguments with the existing documentation. For Suzuki's comment, I will do it as a separate change that converts all the other hard coded values to a more consistent sysreg.h style: nit: While at this, please could you change the hard coded value to ETM4_CFG_BIT_RETSTK ? Changes since v1: * Added Leo's reviewed by on patch 3 * Fix bracket styling * Add documentation Applies on top of coresight/next efa56eddf5d5c. But this docs fix is also required to get the links to work: https://marc.info/?l=linux-doc&m=164139331923986&w=2 Also available at: https://gitlab.arm.com/linux-arm/linux-jc/-/tree/james-branch-broadcast-v2 James Clark (6): coresight: Add config flag to enable branch broadcast coresight: Fail to open with return stacks if they are unavailable perf cs-etm: Update deduction of TRCCONFIGR register for branch broadcast Documentation: coresight: Turn numbered subsections into real subsections Documentation: coresight: Link config options to existing documentation Documentation: coresight: Expand branch broadcast documentation .../coresight/coresight-etm4x-reference.rst | 14 ++++- Documentation/trace/coresight/coresight.rst | 56 +++++++++++++++++-- .../hwtracing/coresight/coresight-etm-perf.c | 2 + .../coresight/coresight-etm4x-core.c | 23 ++++++-- include/linux/coresight-pmu.h | 2 + tools/include/linux/coresight-pmu.h | 2 + tools/perf/arch/arm/util/cs-etm.c | 3 + 7 files changed, 92 insertions(+), 10 deletions(-) -- 2.28.0

2 years, 5 months

[PATCH 0/2] coresight: etm4x: Expose default timestamp source in sysfs

by German Gomez

Hi, I'm Sending this sysfs addition to the etm4x driver in order to expose the timestamp source of the trace (given by the TRFCR_ELx.TS register). As mentioned in [1/2], having this information is useful for assigning Kernel times to the perf samples. Thanks, German German Gomez (3): coresight: etm4x: Expose default timestamp source in sysfs coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface perf cs_etm: Store ts_source in AUXTRACE_INFO fields .../testing/sysfs-bus-coresight-devices-etm4x | 8 +++ .../coresight/coresight-etm4x-reference.rst | 14 ++++ arch/arm64/include/asm/sysreg.h | 1 + .../coresight/coresight-etm4x-sysfs.c | 34 ++++++++++ tools/perf/arch/arm/util/cs-etm.c | 64 +++++++++++++++++-- tools/perf/util/cs-etm.c | 61 +++++++++--------- tools/perf/util/cs-etm.h | 13 +++- 7 files changed, 159 insertions(+), 36 deletions(-) -- 2.25.1

2 years, 5 months

Perf trace decode script

by Tanmay Jagdale

Hi Mike, We would like to know if the perf decode script (cs-trace-disasm.py) mentioned in the OpenCSD HOWTO page is hosted anywhere ? https://github.com/Linaro/OpenCSD/blob/master/HOWTO.md#trace-decoding-with-… Also, does the script support generating instruction trace for both user space and kernel space ? With Regards, Tanmay

2 years, 5 months

Re: [PATCH v7 2/7] hwtracing: Add trace function support for HiSilicon PCIe Tune and Trace device

by Leo Yan

On Thu, Apr 07, 2022 at 08:58:36PM +0800, Yicong Yang via iommu wrote: > HiSilicon PCIe tune and trace device(PTT) is a PCIe Root Complex integrated > Endpoint(RCiEP) device, providing the capability to dynamically monitor and > tune the PCIe traffic, and trace the TLP headers. > > Add the driver for the device to enable the trace function. Register PMU > device of PTT trace, then users can use trace through perf command. The > driver makes use of perf AUX trace and support following events to > configure the trace: > > - filter: select Root port or Endpoint to trace > - type: select the type of traced TLP headers > - direction: select the direction of traced TLP headers > - format: select the data format of the traced TLP headers > > This patch adds the driver part of PTT trace. The perf command support of > PTT trace is added in the following patch. > > Signed-off-by: Yicong Yang <yangyicong(a)hisilicon.com> > Reviewed-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> > --- > drivers/Makefile | 1 + > drivers/hwtracing/Kconfig | 2 + > drivers/hwtracing/ptt/Kconfig | 12 + > drivers/hwtracing/ptt/Makefile | 2 + > drivers/hwtracing/ptt/hisi_ptt.c | 874 +++++++++++++++++++++++++++++++ > drivers/hwtracing/ptt/hisi_ptt.h | 166 ++++++ > 6 files changed, 1057 insertions(+) > create mode 100644 drivers/hwtracing/ptt/Kconfig > create mode 100644 drivers/hwtracing/ptt/Makefile > create mode 100644 drivers/hwtracing/ptt/hisi_ptt.c > create mode 100644 drivers/hwtracing/ptt/hisi_ptt.h > > diff --git a/drivers/Makefile b/drivers/Makefile > index 020780b6b4d2..662d50599467 100644 > --- a/drivers/Makefile > +++ b/drivers/Makefile > @@ -175,6 +175,7 @@ obj-$(CONFIG_USB4) += thunderbolt/ > obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/ > obj-y += hwtracing/intel_th/ > obj-$(CONFIG_STM) += hwtracing/stm/ > +obj-$(CONFIG_HISI_PTT) += hwtracing/ptt/ > obj-$(CONFIG_ANDROID) += android/ > obj-$(CONFIG_NVMEM) += nvmem/ > obj-$(CONFIG_FPGA) += fpga/ > diff --git a/drivers/hwtracing/Kconfig b/drivers/hwtracing/Kconfig > index 13085835a636..911ee977103c 100644 > --- a/drivers/hwtracing/Kconfig > +++ b/drivers/hwtracing/Kconfig > @@ -5,4 +5,6 @@ source "drivers/hwtracing/stm/Kconfig" > > source "drivers/hwtracing/intel_th/Kconfig" > > +source "drivers/hwtracing/ptt/Kconfig" > + > endmenu > diff --git a/drivers/hwtracing/ptt/Kconfig b/drivers/hwtracing/ptt/Kconfig > new file mode 100644 > index 000000000000..8902a6f27563 > --- /dev/null > +++ b/drivers/hwtracing/ptt/Kconfig > @@ -0,0 +1,12 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +config HISI_PTT > + tristate "HiSilicon PCIe Tune and Trace Device" > + depends on ARM64 || (COMPILE_TEST && 64BIT) > + depends on PCI && HAS_DMA && HAS_IOMEM && PERF_EVENTS > + help > + HiSilicon PCIe Tune and Trace Device exists as a PCIe RCiEP > + device, and it provides support for PCIe traffic tuning and > + tracing TLP headers to the memory. > + > + This driver can also be built as a module. If so, the module > + will be called hisi_ptt. > diff --git a/drivers/hwtracing/ptt/Makefile b/drivers/hwtracing/ptt/Makefile > new file mode 100644 > index 000000000000..908c09a98161 > --- /dev/null > +++ b/drivers/hwtracing/ptt/Makefile > @@ -0,0 +1,2 @@ > +# SPDX-License-Identifier: GPL-2.0 > +obj-$(CONFIG_HISI_PTT) += hisi_ptt.o > diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c > new file mode 100644 > index 000000000000..242b41870380 > --- /dev/null > +++ b/drivers/hwtracing/ptt/hisi_ptt.c > @@ -0,0 +1,874 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Driver for HiSilicon PCIe tune and trace device > + * > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + * Author: Yicong Yang <yangyicong(a)hisilicon.com> > + */ > + > +#include <linux/bitfield.h> > +#include <linux/bitops.h> > +#include <linux/delay.h> > +#include <linux/dma-iommu.h> > +#include <linux/dma-mapping.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/iommu.h> > +#include <linux/iopoll.h> > +#include <linux/module.h> > +#include <linux/sysfs.h> > +#include <linux/vmalloc.h> > + > +#include "hisi_ptt.h" > + > +static u16 hisi_ptt_get_filter_val(struct pci_dev *pdev) > +{ > + if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT) > + return BIT(HISI_PCIE_CORE_PORT_ID(PCI_SLOT(pdev->devfn))); > + > + return PCI_DEVID(pdev->bus->number, pdev->devfn); > +} > + > +static bool hisi_ptt_wait_trace_hw_idle(struct hisi_ptt *hisi_ptt) > +{ > + u32 val; > + > + return !readl_poll_timeout_atomic(hisi_ptt->iobase + HISI_PTT_TRACE_STS, > + val, val & HISI_PTT_TRACE_IDLE, > + HISI_PTT_WAIT_POLL_INTERVAL_US, > + HISI_PTT_WAIT_TRACE_TIMEOUT_US); > +} > + > +static bool hisi_ptt_wait_dma_reset_done(struct hisi_ptt *hisi_ptt) > +{ > + u32 val; > + > + return !readl_poll_timeout_atomic(hisi_ptt->iobase + HISI_PTT_TRACE_WR_STS, > + val, !val, HISI_PTT_RESET_POLL_INTERVAL_US, > + HISI_PTT_RESET_TIMEOUT_US); > +} > + > +static void hisi_ptt_free_trace_buf(struct hisi_ptt *hisi_ptt) > +{ > + struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl; > + struct device *dev = &hisi_ptt->pdev->dev; > + int i; > + > + if (!ctrl->trace_buf) > + return; > + > + for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; i++) { > + if (ctrl->trace_buf[i].addr) > + dmam_free_coherent(dev, HISI_PTT_TRACE_BUF_SIZE, > + ctrl->trace_buf[i].addr, > + ctrl->trace_buf[i].dma); > + } > + > + devm_kfree(dev, ctrl->trace_buf); > + ctrl->trace_buf = NULL; > +} > + > +static int hisi_ptt_alloc_trace_buf(struct hisi_ptt *hisi_ptt) > +{ > + struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl; > + struct device *dev = &hisi_ptt->pdev->dev; > + int i; > + > + hisi_ptt->trace_ctrl.buf_index = 0; > + > + /* If the trace buffer has already been allocated, zero it. */ > + if (ctrl->trace_buf) { > + for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; i++) > + memset(ctrl->trace_buf[i].addr, 0, HISI_PTT_TRACE_BUF_SIZE); > + return 0; > + } > + > + ctrl->trace_buf = devm_kcalloc(dev, HISI_PTT_TRACE_BUF_CNT, > + sizeof(struct hisi_ptt_dma_buffer), GFP_KERNEL); > + if (!ctrl->trace_buf) > + return -ENOMEM; > + > + for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; ++i) { > + ctrl->trace_buf[i].addr = dmam_alloc_coherent(dev, HISI_PTT_TRACE_BUF_SIZE, > + &ctrl->trace_buf[i].dma, > + GFP_KERNEL); > + if (!ctrl->trace_buf[i].addr) { > + hisi_ptt_free_trace_buf(hisi_ptt); > + return -ENOMEM; > + } > + } > + > + return 0; > +} > + > +static void hisi_ptt_trace_end(struct hisi_ptt *hisi_ptt) > +{ > + writel(0, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + hisi_ptt->trace_ctrl.started = false; > +} > + > +static int hisi_ptt_trace_start(struct hisi_ptt *hisi_ptt) > +{ > + struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl; > + u32 val; > + int i; > + > + /* Check device idle before start trace */ > + if (!hisi_ptt_wait_trace_hw_idle(hisi_ptt)) { > + pci_err(hisi_ptt->pdev, "Failed to start trace, the device is still busy\n"); > + return -EBUSY; > + } > + > + ctrl->started = true; > + > + /* Reset the DMA before start tracing */ > + val = readl(hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + val |= HISI_PTT_TRACE_CTRL_RST; > + writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + > + hisi_ptt_wait_dma_reset_done(hisi_ptt); > + > + val = readl(hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + val &= ~HISI_PTT_TRACE_CTRL_RST; > + writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + > + /* Clear the interrupt status */ > + writel(HISI_PTT_TRACE_INT_STAT_MASK, hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT); > + writel(0, hisi_ptt->iobase + HISI_PTT_TRACE_INT_MASK); > + > + /* Configure the trace DMA buffer */ > + for (i = 0; i < HISI_PTT_TRACE_BUF_CNT; i++) { > + writel(lower_32_bits(ctrl->trace_buf[i].dma), > + hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_BASE_LO_0 + > + i * HISI_PTT_TRACE_ADDR_STRIDE); > + writel(upper_32_bits(ctrl->trace_buf[i].dma), > + hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_BASE_HI_0 + > + i * HISI_PTT_TRACE_ADDR_STRIDE); > + } > + writel(HISI_PTT_TRACE_BUF_SIZE, hisi_ptt->iobase + HISI_PTT_TRACE_ADDR_SIZE); > + > + /* Set the trace control register */ > + val = FIELD_PREP(HISI_PTT_TRACE_CTRL_TYPE_SEL, ctrl->type); > + val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_RXTX_SEL, ctrl->direction); > + val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_DATA_FORMAT, ctrl->format); > + val |= FIELD_PREP(HISI_PTT_TRACE_CTRL_TARGET_SEL, hisi_ptt->trace_ctrl.filter); > + if (!hisi_ptt->trace_ctrl.is_port) > + val |= HISI_PTT_TRACE_CTRL_FILTER_MODE; > + > + /* Start the Trace */ > + val |= HISI_PTT_TRACE_CTRL_EN; > + writel(val, hisi_ptt->iobase + HISI_PTT_TRACE_CTRL); > + > + return 0; > +} > + > +static int hisi_ptt_update_aux(struct hisi_ptt *hisi_ptt, int index, bool stop) > +{ > + struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl; > + struct perf_output_handle *handle = &ctrl->handle; > + struct perf_event *event = handle->event; > + struct hisi_ptt_pmu_buf *buf; > + void *addr; > + > + buf = perf_get_aux(handle); > + if (!buf || !handle->size) > + return -EINVAL; > + > + addr = ctrl->trace_buf[ctrl->buf_index].addr; > + > + memcpy(buf->base + buf->pos, addr, HISI_PTT_TRACE_BUF_SIZE); > + memset(addr, 0, HISI_PTT_TRACE_BUF_SIZE); I am a bit worry buffer usages, at least for below aspects: The first thing is for memset(), which cleans up the buffer and the buffer size is 4MiB, this means it will consume much CPU time to cleanup the buffer, and trace_buf is mapped as non-cacheable, the performance would be get worse. The second thing is here it always copies the trace data with size HISI_PTT_TRACE_BUF_SIZE, usually, the trace module can provide a read pointer register, so you can know the trace data length based on the delta value between write and read pointers. The last thing is the ctrl->trace_buf[] works as bounce buffer, so it means actually there have an extra copy from bounce buffer to AUX buffer, is it possible to directly output PTT trace data to AUX buffer? Sorry if I bring up duplicate questions and before have the simliar discussion when reviewed the patch. > + buf->pos += HISI_PTT_TRACE_BUF_SIZE; > + > + if (stop) { > + perf_aux_output_end(handle, buf->pos); > + } else if (buf->length - buf->pos < HISI_PTT_TRACE_BUF_SIZE) { > + perf_aux_output_skip(handle, buf->length - buf->pos); > + perf_aux_output_end(handle, buf->pos); > + > + buf = perf_aux_output_begin(handle, event); > + if (!buf) > + return -EINVAL; > + > + buf->pos = handle->head % buf->length; > + if (buf->length - buf->pos < HISI_PTT_TRACE_BUF_SIZE) { > + perf_aux_output_end(handle, 0); > + return -EINVAL; > + } > + } > + > + return 0; > +} > + > +static irqreturn_t hisi_ptt_isr(int irq, void *context) > +{ > + struct hisi_ptt *hisi_ptt = context; > + u32 status, buf_idx; > + > + status = readl(hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT); > + buf_idx = ffs(status) - 1; > + > + /* Clear the interrupt status of buffer @buf_idx */ > + writel(status, hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT); > + > + /* > + * Update the AUX buffer and cache the current buffer index, > + * as we need to know this and save the data when the trace > + * is ended out of the interrupt handler. End the trace > + * if the updating fails. > + */ > + if (hisi_ptt_update_aux(hisi_ptt, buf_idx, false)) > + hisi_ptt_trace_end(hisi_ptt); > + else > + hisi_ptt->trace_ctrl.buf_index = (buf_idx + 1) % HISI_PTT_TRACE_BUF_CNT; > + > + return IRQ_HANDLED; > +} > + > +static irqreturn_t hisi_ptt_irq(int irq, void *context) > +{ > + struct hisi_ptt *hisi_ptt = context; > + u32 status; > + > + status = readl(hisi_ptt->iobase + HISI_PTT_TRACE_INT_STAT); > + if (!(status & HISI_PTT_TRACE_INT_STAT_MASK)) > + return IRQ_NONE; > + > + return IRQ_WAKE_THREAD; > +} > + > +static void hisi_ptt_irq_free_vectors(void *pdev) > +{ > + pci_free_irq_vectors(pdev); > +} > + > +static int hisi_ptt_register_irq(struct hisi_ptt *hisi_ptt) > +{ > + struct pci_dev *pdev = hisi_ptt->pdev; > + int ret; > + > + ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); > + if (ret < 0) { > + pci_err(pdev, "failed to allocate irq vector, ret = %d\n", ret); > + return ret; > + } > + > + ret = devm_add_action_or_reset(&pdev->dev, hisi_ptt_irq_free_vectors, pdev); > + if (ret < 0) > + return ret; > + > + ret = devm_request_threaded_irq(&pdev->dev, > + pci_irq_vector(pdev, HISI_PTT_TRACE_DMA_IRQ), > + hisi_ptt_irq, hisi_ptt_isr, 0, > + DRV_NAME, hisi_ptt); > + if (ret) { > + pci_err(pdev, "failed to request irq %d, ret = %d\n", > + pci_irq_vector(pdev, HISI_PTT_TRACE_DMA_IRQ), ret); > + return ret; > + } > + > + return 0; > +} > + > +static int hisi_ptt_init_filters(struct pci_dev *pdev, void *data) > +{ > + struct hisi_ptt_filter_desc *filter; > + struct hisi_ptt *hisi_ptt = data; > + struct list_head *target_list; > + > + target_list = pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT ? > + &hisi_ptt->port_filters : &hisi_ptt->req_filters; > + > + filter = kzalloc(sizeof(*filter), GFP_KERNEL); > + if (!filter) { > + pci_err(hisi_ptt->pdev, "failed to add filter %s\n", pci_name(pdev)); > + return -ENOMEM; > + } > + > + filter->pdev = pdev; > + list_add_tail(&filter->list, target_list); > + > + /* Update the available port mask */ > + if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT) > + hisi_ptt->port_mask |= hisi_ptt_get_filter_val(pdev); > + > + return 0; > +} > + > +static void hisi_ptt_release_filters(void *data) > +{ > + struct hisi_ptt_filter_desc *filter, *tfilter; > + struct hisi_ptt *hisi_ptt = data; > + > + list_for_each_entry_safe(filter, tfilter, &hisi_ptt->req_filters, list) { > + list_del(&filter->list); > + kfree(filter); > + } > + > + list_for_each_entry_safe(filter, tfilter, &hisi_ptt->port_filters, list) { > + list_del(&filter->list); > + kfree(filter); > + } > +} > + > +static int hisi_ptt_init_ctrls(struct hisi_ptt *hisi_ptt) > +{ > + struct pci_dev *pdev = hisi_ptt->pdev; > + struct pci_bus *bus; > + int ret; > + u32 reg; > + > + INIT_LIST_HEAD(&hisi_ptt->port_filters); > + INIT_LIST_HEAD(&hisi_ptt->req_filters); > + > + /* > + * The device range register provides the information about the > + * root ports which the RCiEP can control and trace. The RCiEP > + * and the root ports it support are on the same PCIe core, with > + * same domain number but maybe different bus number. The device > + * range register will tell us which root ports we can support, > + * Bit[31:16] indicates the upper BDF numbers of the root port, > + * while Bit[15:0] indicates the lower. > + */ > + reg = readl(hisi_ptt->iobase + HISI_PTT_DEVICE_RANGE); > + hisi_ptt->upper = FIELD_GET(HISI_PTT_DEVICE_RANGE_UPPER, reg); > + hisi_ptt->lower = FIELD_GET(HISI_PTT_DEVICE_RANGE_LOWER, reg); > + > + bus = pci_find_bus(pci_domain_nr(pdev->bus), PCI_BUS_NUM(hisi_ptt->upper)); > + if (bus) > + pci_walk_bus(bus, hisi_ptt_init_filters, hisi_ptt); > + > + ret = devm_add_action_or_reset(&pdev->dev, hisi_ptt_release_filters, hisi_ptt); > + if (ret) > + return ret; > + > + hisi_ptt->trace_ctrl.default_cpu = cpumask_first(cpumask_of_node(dev_to_node(&pdev->dev))); > + > + return 0; > +} > + > +#define HISI_PTT_PMU_FILTER_IS_PORT BIT(19) > +#define HISI_PTT_PMU_FILTER_VAL_MASK GENMASK(15, 0) > +#define HISI_PTT_PMU_DIRECTION_MASK GENMASK(23, 20) > +#define HISI_PTT_PMU_TYPE_MASK GENMASK(31, 24) > +#define HISI_PTT_PMU_FORMAT_MASK GENMASK(35, 32) > + > +static ssize_t available_root_port_filters_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev)); > + struct hisi_ptt_filter_desc *filter; > + int pos = 0; > + > + mutex_lock(&hisi_ptt->mutex); > + if (list_empty(&hisi_ptt->port_filters)) { > + pos = sysfs_emit(buf, "\n"); > + goto out; > + } > + > + list_for_each_entry(filter, &hisi_ptt->port_filters, list) > + pos += sysfs_emit_at(buf, pos, "%s 0x%05lx\n", > + pci_name(filter->pdev), > + hisi_ptt_get_filter_val(filter->pdev) | > + HISI_PTT_PMU_FILTER_IS_PORT); > + > +out: > + mutex_unlock(&hisi_ptt->mutex); > + return pos; > +} > +static DEVICE_ATTR_ADMIN_RO(available_root_port_filters); > + > +static ssize_t available_requester_filters_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev)); > + struct hisi_ptt_filter_desc *filter; > + int pos = 0; > + > + mutex_lock(&hisi_ptt->mutex); > + if (list_empty(&hisi_ptt->req_filters)) { > + pos = sysfs_emit(buf, "\n"); > + goto out; > + } > + > + list_for_each_entry(filter, &hisi_ptt->req_filters, list) > + pos += sysfs_emit_at(buf, pos, "%s 0x%05x\n", > + pci_name(filter->pdev), > + hisi_ptt_get_filter_val(filter->pdev)); > + > +out: > + mutex_unlock(&hisi_ptt->mutex); > + return pos; > +} > +static DEVICE_ATTR_ADMIN_RO(available_requester_filters); > + > +PMU_FORMAT_ATTR(filter, "config:0-19"); > +PMU_FORMAT_ATTR(direction, "config:20-23"); > +PMU_FORMAT_ATTR(type, "config:24-31"); > +PMU_FORMAT_ATTR(format, "config:32-35"); > + > +static struct attribute *hisi_ptt_pmu_format_attrs[] = { > + &format_attr_filter.attr, > + &format_attr_direction.attr, > + &format_attr_type.attr, > + &format_attr_format.attr, > + NULL > +}; > + > +static struct attribute_group hisi_ptt_pmu_format_group = { > + .name = "format", > + .attrs = hisi_ptt_pmu_format_attrs, > +}; > + > +static struct attribute *hisi_ptt_pmu_filter_attrs[] = { > + &dev_attr_available_root_port_filters.attr, > + &dev_attr_available_requester_filters.attr, > + NULL > +}; > + > +static struct attribute_group hisi_ptt_pmu_filter_group = { > + .attrs = hisi_ptt_pmu_filter_attrs, > +}; > + > +static const struct attribute_group *hisi_ptt_pmu_groups[] = { > + &hisi_ptt_pmu_format_group, > + &hisi_ptt_pmu_filter_group, > + NULL > +}; > + > +/* > + * Check whether the config is valid or not. Some configs are multi-selectable > + * and can be set simultaneously, while some are single selectable (onehot). > + * Use this function to check the non-onehot configs while > + * hisi_ptt_trace_valid_config_onehot() for the onehot ones. > + */ > +static int hisi_ptt_trace_valid_config(u32 val, const u32 *available_list, u32 list_size) > +{ > + int i; > + > + /* The non-onehot configs cannot be 0. */ > + if (!val) > + return -EINVAL; > + > + /* > + * Walk the available list and clear the valid bits of > + * the config. If there is any resident bit after the > + * walk then the config is invalid. > + */ > + for (i = 0; i < list_size; i++) > + val &= ~available_list[i]; > + > + return val ? -EINVAL : 0; > +} > + > +static int hisi_ptt_trace_valid_config_onehot(u32 val, const u32 *available_list, u32 list_size) > +{ > + int i; > + > + for (i = 0; i < list_size; i++) > + if (val == available_list[i]) > + return 0; > + > + return -EINVAL; > +} > + > +static int hisi_ptt_trace_init_filter(struct hisi_ptt *hisi_ptt, u64 config) > +{ > + unsigned long val, port_mask = hisi_ptt->port_mask; > + struct hisi_ptt_filter_desc *filter; > + int ret = -EINVAL; > + > + hisi_ptt->trace_ctrl.is_port = FIELD_GET(HISI_PTT_PMU_FILTER_IS_PORT, config); > + val = FIELD_GET(HISI_PTT_PMU_FILTER_VAL_MASK, config); > + > + /* > + * Port filters are defined as bit mask. For port filters, check > + * the bits in the @val are within the range of hisi_ptt->port_mask > + * and whether it's empty or not, otherwise user has specified > + * some unsupported root ports. > + * > + * For Requester ID filters, walk the available filter list to see > + * whether we have one matched. > + */ > + if (!hisi_ptt->trace_ctrl.is_port) { > + list_for_each_entry(filter, &hisi_ptt->req_filters, list) > + if (val == hisi_ptt_get_filter_val(filter->pdev)) { > + ret = 0; > + break; > + } > + } else if (bitmap_subset(&val, &port_mask, BITS_PER_LONG)) { > + ret = 0; > + } > + > + if (ret) > + return ret; > + > + hisi_ptt->trace_ctrl.filter = val; > + return 0; > +} > + > +static int hisi_ptt_pmu_event_init(struct perf_event *event) > +{ > + /* > + * The supported value of the direction parameter. See hisi_ptt.rst > + * documentation for more details. > + */ > + static const u32 hisi_ptt_trace_available_direction[] = { > + 0, > + 1, > + 2, > + 3, > + }; > + /* Different types can be set simultaneously */ > + static const u32 hisi_ptt_trace_available_type[] = { > + 1, /* posted_request */ > + 2, /* non-posted_request */ > + 4, /* completion */ > + }; > + static const u32 hisi_ptt_trace_availble_format[] = { > + 0, /* 4DW */ > + 1, /* 8DW */ > + }; > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu); > + struct hisi_ptt_trace_ctrl *ctrl = &hisi_ptt->trace_ctrl; > + int ret; > + u32 val; > + > + if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type) > + return -ENOENT; Does PTT support per-task mode? Usually PMU not binding to CPU cannot support per-task mode, if this is the case, please add checking like below (copied code from arm_smmuv3_pmu.c): if (event->cpu < 0) { dev_dbg(dev, "Per-task mode not supported\n"); return -EOPNOTSUPP; } > + > + mutex_lock(&hisi_ptt->mutex); Here really need mutex for protection? I think the question can be extended as "if the mutex is necessary for the whole driver"? The reason is the perf core layer has provided the APIs perf_event_ctx_lock() and perf_event_ctx_unlock() to protect event context, and perf core layer has the mutex 'event->mmap_mutex' to protect setup_aux(). Please note, I think init_event() callback is not protected by lock, so you could see many PMU drivers use init_event() callback to validate if the event parameters (e.g. if can work as group events with other hardware events, support stack track, etc). This means below initialise functions should be moved to add() or setup_aux() callbacks, since these functions have been protected by mutex in perf core layer. > + > + ret = hisi_ptt_trace_init_filter(hisi_ptt, event->attr.config); > + if (ret < 0) > + goto out; > + > + val = FIELD_GET(HISI_PTT_PMU_DIRECTION_MASK, event->attr.config); > + ret = hisi_ptt_trace_valid_config_onehot(val, hisi_ptt_trace_available_direction, > + ARRAY_SIZE(hisi_ptt_trace_available_direction)); > + if (ret < 0) > + goto out; > + ctrl->direction = val; > + > + val = FIELD_GET(HISI_PTT_PMU_TYPE_MASK, event->attr.config); > + ret = hisi_ptt_trace_valid_config(val, hisi_ptt_trace_available_type, > + ARRAY_SIZE(hisi_ptt_trace_available_type)); > + if (ret < 0) > + goto out; > + ctrl->type = val; > + > + val = FIELD_GET(HISI_PTT_PMU_FORMAT_MASK, event->attr.config); > + ret = hisi_ptt_trace_valid_config_onehot(val, hisi_ptt_trace_availble_format, > + ARRAY_SIZE(hisi_ptt_trace_availble_format)); > + if (ret < 0) > + goto out; > + ctrl->format = val; > + > +out: > + mutex_unlock(&hisi_ptt->mutex); > + return ret; > +} > + > +static void *hisi_ptt_pmu_setup_aux(struct perf_event *event, void **pages, > + int nr_pages, bool overwrite) > +{ > + struct hisi_ptt_pmu_buf *buf; > + struct page **pagelist; > + int i; > + > + if (overwrite) { > + dev_warn(event->pmu->dev, "Overwrite mode is not supported\n"); > + return NULL; > + } > + > + /* If the pages size less than buffers, we cannot start trace */ > + if (nr_pages < HISI_PTT_TRACE_TOTAL_BUF_SIZE / PAGE_SIZE) > + return NULL; > + > + buf = kzalloc(sizeof(*buf), GFP_KERNEL); > + if (!buf) > + return NULL; > + > + pagelist = kcalloc(nr_pages, sizeof(*pagelist), GFP_KERNEL); > + if (!pagelist) { > + kfree(buf); > + return NULL; > + } > + > + for (i = 0; i < nr_pages; i++) > + pagelist[i] = virt_to_page(pages[i]); > + > + buf->base = vmap(pagelist, nr_pages, VM_MAP, PAGE_KERNEL); > + if (!buf->base) { > + kfree(pagelist); > + kfree(buf); > + return NULL; > + } > + > + buf->nr_pages = nr_pages; > + buf->length = nr_pages * PAGE_SIZE; > + buf->pos = 0; > + > + kfree(pagelist); > + return buf; > +} > + > +static void hisi_ptt_pmu_free_aux(void *aux) > +{ > + struct hisi_ptt_pmu_buf *buf = aux; > + > + vunmap(buf->base); > + kfree(buf); > +} > + > +static void hisi_ptt_pmu_start(struct perf_event *event, int flags) > +{ > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu); > + struct perf_output_handle *handle = &hisi_ptt->trace_ctrl.handle; > + struct hw_perf_event *hwc = &event->hw; > + struct hisi_ptt_pmu_buf *buf; > + int cpu = event->cpu; > + int ret; > + > + hwc->state = 0; > + mutex_lock(&hisi_ptt->mutex); > + if (hisi_ptt->trace_ctrl.started) { > + pci_dbg(hisi_ptt->pdev, "trace has already started\n"); Essentialy this is not a PCI driver, it's good to use dev_dbg() variant in the whole driver. > + goto stop; > + } > + > + if (cpu == -1) > + cpu = hisi_ptt->trace_ctrl.default_cpu; > + > + /* > + * Handle the interrupt on the same cpu which starts the trace to avoid > + * context mismatch. Otherwise we'll trigger the WARN from the perf > + * core in event_function_local(). > + */ > + WARN_ON(irq_set_affinity(pci_irq_vector(hisi_ptt->pdev, HISI_PTT_TRACE_DMA_IRQ), > + cpumask_of(cpu))); Nitpick: Can set the irq affinity in the probe phase? Seems to me, the driver has enough info to set irq affinity in the probe phase, it's not very necessary to defer to set irq affinity at here. > + > + ret = hisi_ptt_alloc_trace_buf(hisi_ptt); > + if (ret) { > + pci_dbg(hisi_ptt->pdev, "alloc trace buf failed, ret = %d\n", ret); > + goto stop; > + } It's not a good idea to allocate buffer in the start(). The reason is start() function might be invoked for multiple times in a perf session. I understand the PTT driver doesn't support per-thread mode and snapshot mode, so the start() callback will be not invoked for multiple times, but you might need to consider if later support snapshot mode. I think it's better to move the buffer allocation into setup_aux(). Will continue to review the perf userspace patch. Thanks, Leo > + > + buf = perf_aux_output_begin(handle, event); > + if (!buf) { > + pci_dbg(hisi_ptt->pdev, "aux output begin failed\n"); > + goto stop; > + } > + > + buf->pos = handle->head % buf->length; > + > + ret = hisi_ptt_trace_start(hisi_ptt); > + if (ret) { > + pci_dbg(hisi_ptt->pdev, "trace start failed, ret = %d\n", ret); > + perf_aux_output_end(handle, 0); > + goto stop; > + } > + > + mutex_unlock(&hisi_ptt->mutex); > + return; > +stop: > + event->hw.state |= PERF_HES_STOPPED; > + mutex_unlock(&hisi_ptt->mutex); > +} > + > +static void hisi_ptt_pmu_stop(struct perf_event *event, int flags) > +{ > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu); > + struct hw_perf_event *hwc = &event->hw; > + > + if (hwc->state & PERF_HES_STOPPED) > + return; > + > + mutex_lock(&hisi_ptt->mutex); > + if (hisi_ptt->trace_ctrl.started) { > + hisi_ptt_trace_end(hisi_ptt); > + WARN(!hisi_ptt_wait_trace_hw_idle(hisi_ptt), "Device is still busy"); > + hisi_ptt_update_aux(hisi_ptt, hisi_ptt->trace_ctrl.buf_index, true); > + } > + mutex_unlock(&hisi_ptt->mutex); > + > + hwc->state |= PERF_HES_STOPPED; > + perf_event_update_userpage(event); > + hwc->state |= PERF_HES_UPTODATE; > +} > + > +static int hisi_ptt_pmu_add(struct perf_event *event, int flags) > +{ > + struct hisi_ptt *hisi_ptt = to_hisi_ptt(event->pmu); > + struct hw_perf_event *hwc = &event->hw; > + int cpu = event->cpu; > + > + /* > + * Only allow the default cpu to add the event if user doesn't specify > + * the cpus. > + */ > + if (cpu == -1 && smp_processor_id() != hisi_ptt->trace_ctrl.default_cpu) > + return 0; > + > + hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE; > + > + if (flags & PERF_EF_START) { > + hisi_ptt_pmu_start(event, PERF_EF_RELOAD); > + if (hwc->state & PERF_HES_STOPPED) > + return -EINVAL; > + } > + > + return 0; > +} > + > +static void hisi_ptt_pmu_del(struct perf_event *event, int flags) > +{ > + hisi_ptt_pmu_stop(event, PERF_EF_UPDATE); > +} > + > +static int hisi_ptt_register_pmu(struct hisi_ptt *hisi_ptt) > +{ > + u16 core_id, sicl_id; > + char *pmu_name; > + u32 reg; > + > + hisi_ptt->hisi_ptt_pmu = (struct pmu) { > + .module = THIS_MODULE, > + .capabilities = PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE, > + .task_ctx_nr = perf_sw_context, > + .attr_groups = hisi_ptt_pmu_groups, > + .event_init = hisi_ptt_pmu_event_init, > + .setup_aux = hisi_ptt_pmu_setup_aux, > + .free_aux = hisi_ptt_pmu_free_aux, > + .start = hisi_ptt_pmu_start, > + .stop = hisi_ptt_pmu_stop, > + .add = hisi_ptt_pmu_add, > + .del = hisi_ptt_pmu_del, > + }; > + > + reg = readl(hisi_ptt->iobase + HISI_PTT_LOCATION); > + core_id = FIELD_GET(HISI_PTT_CORE_ID, reg); > + sicl_id = FIELD_GET(HISI_PTT_SICL_ID, reg); > + > + pmu_name = devm_kasprintf(&hisi_ptt->pdev->dev, GFP_KERNEL, "hisi_ptt%u_%u", > + sicl_id, core_id); > + if (!pmu_name) > + return -ENOMEM; > + > + return perf_pmu_register(&hisi_ptt->hisi_ptt_pmu, pmu_name, -1); > +} > + > +/* > + * The DMA of PTT trace can only use direct mapping, due to some > + * hardware restriction. Check whether there is an IOMMU or the > + * policy of the IOMMU domain is passthrough, otherwise the trace > + * cannot work. > + * > + * The PTT device is supposed to behind the ARM SMMUv3, which > + * should have passthrough the device by a quirk. > + */ > +static int hisi_ptt_check_iommu_mapping(struct pci_dev *pdev) > +{ > + struct iommu_domain *iommu_domain; > + > + iommu_domain = iommu_get_domain_for_dev(&pdev->dev); > + if (!iommu_domain || iommu_domain->type == IOMMU_DOMAIN_IDENTITY) > + return 0; > + > + return -EOPNOTSUPP; > +} > + > +static int hisi_ptt_probe(struct pci_dev *pdev, > + const struct pci_device_id *id) > +{ > + struct hisi_ptt *hisi_ptt; > + int ret; > + > + ret = hisi_ptt_check_iommu_mapping(pdev); > + if (ret) { > + pci_err(pdev, "requires direct DMA mappings\n"); > + return ret; > + } > + > + hisi_ptt = devm_kzalloc(&pdev->dev, sizeof(*hisi_ptt), GFP_KERNEL); > + if (!hisi_ptt) > + return -ENOMEM; > + > + mutex_init(&hisi_ptt->mutex); > + hisi_ptt->pdev = pdev; > + pci_set_drvdata(pdev, hisi_ptt); > + > + ret = pcim_enable_device(pdev); > + if (ret) { > + pci_err(pdev, "failed to enable device, ret = %d\n", ret); > + return ret; > + } > + > + ret = pcim_iomap_regions(pdev, BIT(2), DRV_NAME); > + if (ret) { > + pci_err(pdev, "failed to remap io memory, ret = %d\n", ret); > + return ret; > + } > + > + hisi_ptt->iobase = pcim_iomap_table(pdev)[2]; > + > + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); > + if (ret) { > + pci_err(pdev, "failed to set 64 bit dma mask, ret = %d\n", ret); > + return ret; > + } > + > + pci_set_master(pdev); > + > + ret = hisi_ptt_register_irq(hisi_ptt); > + if (ret) > + return ret; > + > + ret = hisi_ptt_init_ctrls(hisi_ptt); > + if (ret) { > + pci_err(pdev, "failed to init controls, ret = %d\n", ret); > + return ret; > + } > + > + ret = hisi_ptt_register_pmu(hisi_ptt); > + if (ret) { > + pci_err(pdev, "failed to register PMU device, ret = %d", ret); > + return ret; > + } > + > + return 0; > +} > + > +static void hisi_ptt_remove(struct pci_dev *pdev) > +{ > + struct hisi_ptt *hisi_ptt = pci_get_drvdata(pdev); > + > + /* > + * We have to manually unregister the PMU device rather than make it > + * devres managed to keep order that the PMU device's unregistration > + * is prior to the release of DMA buffers. As the DMA buffers are > + * devm allocated when necessary which is after the registration of > + * the PMU device. > + */ > + perf_pmu_unregister(&hisi_ptt->hisi_ptt_pmu); > +} > + > +static const struct pci_device_id hisi_ptt_id_tbl[] = { > + { PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, 0xa12e) }, > + { } > +}; > +MODULE_DEVICE_TABLE(pci, hisi_ptt_id_tbl); > + > +static struct pci_driver hisi_ptt_driver = { > + .name = DRV_NAME, > + .id_table = hisi_ptt_id_tbl, > + .probe = hisi_ptt_probe, > + .remove = hisi_ptt_remove, > +}; > +module_pci_driver(hisi_ptt_driver); > + > +MODULE_LICENSE("GPL"); > +MODULE_AUTHOR("Yicong Yang <yangyicong(a)hisilicon.com>"); > +MODULE_DESCRIPTION("Driver for HiSilicon PCIe tune and trace device"); > diff --git a/drivers/hwtracing/ptt/hisi_ptt.h b/drivers/hwtracing/ptt/hisi_ptt.h > new file mode 100644 > index 000000000000..29b6d6293d6c > --- /dev/null > +++ b/drivers/hwtracing/ptt/hisi_ptt.h > @@ -0,0 +1,166 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Driver for HiSilicon PCIe tune and trace device > + * > + * Copyright (c) 2022 HiSilicon Technologies Co., Ltd. > + * Author: Yicong Yang <yangyicong(a)hisilicon.com> > + */ > + > +#ifndef _HISI_PTT_H > +#define _HISI_PTT_H > + > +#include <linux/bits.h> > +#include <linux/list.h> > +#include <linux/mutex.h> > +#include <linux/pci.h> > +#include <linux/perf_event.h> > +#include <linux/types.h> > + > +#define DRV_NAME "hisi_ptt" > + > +/* > + * The definition of the device registers and register fields. > + */ > +#define HISI_PTT_TRACE_ADDR_SIZE 0x0800 > +#define HISI_PTT_TRACE_ADDR_BASE_LO_0 0x0810 > +#define HISI_PTT_TRACE_ADDR_BASE_HI_0 0x0814 > +#define HISI_PTT_TRACE_ADDR_STRIDE 0x8 > +#define HISI_PTT_TRACE_CTRL 0x0850 > +#define HISI_PTT_TRACE_CTRL_EN BIT(0) > +#define HISI_PTT_TRACE_CTRL_RST BIT(1) > +#define HISI_PTT_TRACE_CTRL_RXTX_SEL GENMASK(3, 2) > +#define HISI_PTT_TRACE_CTRL_TYPE_SEL GENMASK(7, 4) > +#define HISI_PTT_TRACE_CTRL_DATA_FORMAT BIT(14) > +#define HISI_PTT_TRACE_CTRL_FILTER_MODE BIT(15) > +#define HISI_PTT_TRACE_CTRL_TARGET_SEL GENMASK(31, 16) > +#define HISI_PTT_TRACE_INT_STAT 0x0890 > +#define HISI_PTT_TRACE_INT_STAT_MASK GENMASK(3, 0) > +#define HISI_PTT_TRACE_INT_MASK 0x0894 > +#define HISI_PTT_TRACE_WR_STS 0x08a0 > +#define HISI_PTT_TRACE_WR_STS_WRITE GENMASK(27, 0) > +#define HISI_PTT_TRACE_WR_STS_BUFFER GENMASK(29, 28) > +#define HISI_PTT_TRACE_STS 0x08b0 > +#define HISI_PTT_TRACE_IDLE BIT(0) > +#define HISI_PTT_DEVICE_RANGE 0x0fe0 > +#define HISI_PTT_DEVICE_RANGE_UPPER GENMASK(31, 16) > +#define HISI_PTT_DEVICE_RANGE_LOWER GENMASK(15, 0) > +#define HISI_PTT_LOCATION 0x0fe8 > +#define HISI_PTT_CORE_ID GENMASK(15, 0) > +#define HISI_PTT_SICL_ID GENMASK(31, 16) > + > +/* Parameters of PTT trace DMA part. */ > +#define HISI_PTT_TRACE_DMA_IRQ 0 > +#define HISI_PTT_TRACE_BUF_CNT 4 > +#define HISI_PTT_TRACE_BUF_SIZE SZ_4M > +#define HISI_PTT_TRACE_TOTAL_BUF_SIZE (HISI_PTT_TRACE_BUF_SIZE * \ > + HISI_PTT_TRACE_BUF_CNT) > +/* Wait time for hardware DMA to reset */ > +#define HISI_PTT_RESET_TIMEOUT_US 10UL > +#define HISI_PTT_RESET_POLL_INTERVAL_US 1UL > +/* Poll timeout and interval for waiting hardware work to finish */ > +#define HISI_PTT_WAIT_TRACE_TIMEOUT_US 100UL > +#define HISI_PTT_WAIT_POLL_INTERVAL_US 10UL > + > +#define HISI_PCIE_CORE_PORT_ID(devfn) (PCI_FUNC(devfn) << 1) > + > +/** > + * struct hisi_ptt_dma_buffer - describe a single trace buffer of PTT trace. > + * The detail of the data format is described > + * in the documentation of PTT device. > + * @dma: DMA address of this buffer visible to the device > + * @addr: virtual address of this buffer visible to the cpu > + */ > +struct hisi_ptt_dma_buffer { > + dma_addr_t dma; > + void *addr; > +}; > + > +/** > + * struct hisi_ptt_trace_ctrl - control and status of PTT trace > + * @trace_buf: array of the trace buffers for holding the trace data. > + * the length will be HISI_PTT_TRACE_BUF_CNT. > + * @handle: perf output handle of current trace session > + * @default_cpu: default cpu to start the trace session > + * @buf_index: the index of current using trace buffer > + * @started: current trace status, true for started > + * @is_port: whether we're tracing root port or not > + * @direction: direction of the TLP headers to trace > + * @filter: filter value for tracing the TLP headers > + * @format: format of the TLP headers to trace > + * @type: type of the TLP headers to trace > + */ > +struct hisi_ptt_trace_ctrl { > + struct hisi_ptt_dma_buffer *trace_buf; > + struct perf_output_handle handle; > + int default_cpu; > + u32 buf_index; > + bool started; > + bool is_port; > + u32 direction:2; > + u32 filter:16; > + u32 format:1; > + u32 type:4; > +}; > + > +/** > + * struct hisi_ptt_filter_desc - descriptor of the PTT trace filter > + * @list: entry of this descriptor in the filter list > + * @pdev: pci_dev related to this filter > + */ > +struct hisi_ptt_filter_desc { > + struct list_head list; > + struct pci_dev *pdev; > +}; > + > + > +/** > + * struct hisi_ptt_pmu_buf - descriptor of the AUX buffer of PTT trace > + * @length: size of the AUX buffer > + * @nr_pages: number of pages of the AUX buffer > + * @base: start address of AUX buffer > + * @pos: position in the AUX buffer to commit traced data > + */ > +struct hisi_ptt_pmu_buf { > + size_t length; > + int nr_pages; > + void *base; > + long pos; > +}; > + > +/** > + * struct hisi_ptt - per PTT device data > + * @trace_ctrl: the control information of PTT trace > + * @hisi_ptt_pmu: the pum device of trace > + * @iobase: base IO address of the device > + * @pdev: pci_dev of this PTT device > + * @mutex: mutex to protect the filter list and serialize the perf process. > + * @upper: the upper BDF range of the PCI devices managed by this PTT device > + * @lower: the lower BDF range of the PCI devices managed by this PTT device > + * @port_filters: the filter list of root ports > + * @req_filters: the filter list of requester ID > + * @port_mask: port mask of the managed root ports > + */ > +struct hisi_ptt { > + struct hisi_ptt_trace_ctrl trace_ctrl; > + struct pmu hisi_ptt_pmu; > + void __iomem *iobase; > + struct pci_dev *pdev; > + struct mutex mutex; > + u32 upper; > + u32 lower; > + > + /* > + * The trace TLP headers can either be filtered by certain > + * root port, or by the requester ID. Organize the filters > + * by @port_filters and @req_filters here. The mask of all > + * the valid ports is also cached for doing sanity check > + * of user input. > + */ > + struct list_head port_filters; > + struct list_head req_filters; > + u16 port_mask; > +}; > + > +#define to_hisi_ptt(pmu) container_of(pmu, struct hisi_ptt, hisi_ptt_pmu) > + > +#endif /* _HISI_PTT_H */ > -- > 2.24.0 > > _______________________________________________ > iommu mailing list > iommu(a)lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu

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CoreSight April 2022