From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA125C433EF for ; Wed, 29 Sep 2021 03:16:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98C99613D3 for ; Wed, 29 Sep 2021 03:16:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243930AbhI2DSf (ORCPT ); Tue, 28 Sep 2021 23:18:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243899AbhI2DSd (ORCPT ); Tue, 28 Sep 2021 23:18:33 -0400 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B69AEC061749; Tue, 28 Sep 2021 20:16:53 -0700 (PDT) Received: by mail-pl1-x632.google.com with SMTP id n2so526086plk.12; Tue, 28 Sep 2021 20:16:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=I7q1KZGQrg9VSlOg55Y4jOv+nbaa+ZG4SOxiTCfz7+A=; b=c4YPx4QoCrd0LGbTXbyUsP5aDbIbvZS1byEnV0+QSmllLjdlS/W4H5oVGH5norE9W0 ItSVOzSGjeNvSisYf/MBeAseD5hc17VbXOZIYCBzzJ25BLuybrXTDNGJiEv1977rXPk6 HpgL1kJ/56+u68hhXeRPXEB7Q2XRL+KmwBbRBe80TJPtAuR/CUIo4JCppKW2Iog2SZn9 TdqpoVTP7O/kaeSxl39+wh2O40vLXPzJ9kPUK0eqwjkbmyHc8ZVWNgiCqaUBpEU09wF1 zVvG7dVTjeWzHN8OsiKI64BTT492xjV3h7HjietjExDSiV2NJHFefu+qxjtBRQ5jbbfd jTEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=I7q1KZGQrg9VSlOg55Y4jOv+nbaa+ZG4SOxiTCfz7+A=; b=iw69fbotgMPAYpa/NL4hBCdHIaGU6whUcnb0wTO57/3s4YMyy1G5wBKk1uRDHy5PeL OW74p/pU8PnR8zGpXZPV9PVcCT2i48uo6YBTXmCcyserDc9VCoUBIzHjSbbqnZxcK0yp kKHY022rG7i/IcHRB0mgf+q3qLENh0Z0xqedeQehRvxJYnIsVzUCfJwblgbyrHQ8/3ZU sCyTNjLXvfRBj/8w2UbojzSF8KxXNAAhV41l+PogfQErXtE/2yvbtiobet6WSmh+C/cM Ez7NotGWx9kqjSlhS6PfGHpWJU0kVEkTahZrxW+TaY3drNAgrXyCRH3UcdiMIvUT5VrF v1/A== X-Gm-Message-State: AOAM532kotZorOJZGIVW+4Yrkc9I9gQOM9I3igjJd2QG4Cs0MZ5fPcD/ zNJQmhPbYFfGG5FXApjlGYw= X-Google-Smtp-Source: ABdhPJzmH04Xwn/NDpUAahm7FPyOQwWagt9o5ZJv6S5XukOPFvQ917pKQ9XMQmQDLQIV2X98MueLMA== X-Received: by 2002:a17:90a:8912:: with SMTP id u18mr3646172pjn.69.1632885413301; Tue, 28 Sep 2021 20:16:53 -0700 (PDT) Received: from localhost.localdomain ([156.146.35.76]) by smtp.gmail.com with ESMTPSA id 65sm464203pfv.210.2021.09.28.20.16.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Sep 2021 20:16:52 -0700 (PDT) From: William Breathitt Gray To: jic23@kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de, a.fatoum@pengutronix.de, kamel.bouhara@bootlin.com, gwendal@chromium.org, alexandre.belloni@bootlin.com, david@lechnology.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com, patrick.havelange@essensium.com, fabrice.gasnier@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, o.rempel@pengutronix.de, jarkko.nikula@linux.intel.com, William Breathitt Gray , Pavel Machek Subject: [PATCH v17 4/9] tools/counter: Create Counter tools Date: Wed, 29 Sep 2021 12:16:01 +0900 Message-Id: <7c0f975ba098952122302d258ec9ffdef04befaf.1632884256.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This creates an example Counter program under tools/counter/* to exemplify the Counter character device interface. Cc: Pavel Machek Signed-off-by: William Breathitt Gray --- MAINTAINERS | 1 + tools/Makefile | 13 ++--- tools/counter/Build | 1 + tools/counter/Makefile | 53 +++++++++++++++++++ tools/counter/counter_example.c | 92 +++++++++++++++++++++++++++++++++ 5 files changed, 154 insertions(+), 6 deletions(-) create mode 100644 tools/counter/Build create mode 100644 tools/counter/Makefile create mode 100644 tools/counter/counter_example.c diff --git a/MAINTAINERS b/MAINTAINERS index 3c95ada1b830..71082000046b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4821,6 +4821,7 @@ F: Documentation/driver-api/generic-counter.rst F: drivers/counter/ F: include/linux/counter.h F: include/uapi/linux/counter.h +F: tools/counter/ CP2615 I2C DRIVER M: Bence Csókás diff --git a/tools/Makefile b/tools/Makefile index 7e9d34ddd74c..5da1fde03a9a 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -12,6 +12,7 @@ help: @echo ' acpi - ACPI tools' @echo ' bpf - misc BPF tools' @echo ' cgroup - cgroup tools' + @echo ' counter - counter tools' @echo ' cpupower - a tool for all things x86 CPU power' @echo ' debugging - tools for debugging' @echo ' firewire - the userspace part of nosy, an IEEE-1394 traffic sniffer' @@ -65,7 +66,7 @@ acpi: FORCE cpupower: FORCE $(call descend,power/$@) -cgroup firewire hv guest bootconfig spi usb virtio vm bpf iio gpio objtool leds wmi pci firmware debugging tracing: FORCE +cgroup counter firewire hv guest bootconfig spi usb virtio vm bpf iio gpio objtool leds wmi pci firmware debugging tracing: FORCE $(call descend,$@) bpf/%: FORCE @@ -100,7 +101,7 @@ freefall: FORCE kvm_stat: FORCE $(call descend,kvm/$@) -all: acpi cgroup cpupower gpio hv firewire liblockdep \ +all: acpi cgroup counter cpupower gpio hv firewire liblockdep \ perf selftests bootconfig spi turbostat usb \ virtio vm bpf x86_energy_perf_policy \ tmon freefall iio objtool kvm_stat wmi \ @@ -112,7 +113,7 @@ acpi_install: cpupower_install: $(call descend,power/$(@:_install=),install) -cgroup_install firewire_install gpio_install hv_install iio_install perf_install bootconfig_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install tracing_install: +cgroup_install counter_install firewire_install gpio_install hv_install iio_install perf_install bootconfig_install spi_install usb_install virtio_install vm_install bpf_install objtool_install wmi_install pci_install debugging_install tracing_install: $(call descend,$(@:_install=),install) liblockdep_install: @@ -133,7 +134,7 @@ freefall_install: kvm_stat_install: $(call descend,kvm/$(@:_install=),install) -install: acpi_install cgroup_install cpupower_install gpio_install \ +install: acpi_install cgroup_install counter_install cpupower_install gpio_install \ hv_install firewire_install iio_install liblockdep_install \ perf_install selftests_install turbostat_install usb_install \ virtio_install vm_install bpf_install x86_energy_perf_policy_install \ @@ -147,7 +148,7 @@ acpi_clean: cpupower_clean: $(call descend,power/cpupower,clean) -cgroup_clean hv_clean firewire_clean bootconfig_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean firmware_clean debugging_clean tracing_clean: +cgroup_clean counter_clean hv_clean firewire_clean bootconfig_clean spi_clean usb_clean virtio_clean vm_clean wmi_clean bpf_clean iio_clean gpio_clean objtool_clean leds_clean pci_clean firmware_clean debugging_clean tracing_clean: $(call descend,$(@:_clean=),clean) liblockdep_clean: @@ -181,7 +182,7 @@ freefall_clean: build_clean: $(call descend,build,clean) -clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean \ +clean: acpi_clean cgroup_clean counter_clean cpupower_clean hv_clean firewire_clean \ perf_clean selftests_clean turbostat_clean bootconfig_clean spi_clean usb_clean virtio_clean \ vm_clean bpf_clean iio_clean x86_energy_perf_policy_clean tmon_clean \ freefall_clean build_clean libbpf_clean libsubcmd_clean liblockdep_clean \ diff --git a/tools/counter/Build b/tools/counter/Build new file mode 100644 index 000000000000..33f4a51d715e --- /dev/null +++ b/tools/counter/Build @@ -0,0 +1 @@ +counter_example-y += counter_example.o diff --git a/tools/counter/Makefile b/tools/counter/Makefile new file mode 100644 index 000000000000..5ebc195fd9c0 --- /dev/null +++ b/tools/counter/Makefile @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: GPL-2.0 +include ../scripts/Makefile.include + +bindir ?= /usr/bin + +ifeq ($(srctree),) +srctree := $(patsubst %/,%,$(dir $(CURDIR))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +endif + +# Do not use make's built-in rules +# (this improves performance and avoids hard-to-debug behaviour); +MAKEFLAGS += -r + +override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include + +ALL_TARGETS := counter_example +ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS)) + +all: $(ALL_PROGRAMS) + +export srctree OUTPUT CC LD CFLAGS +include $(srctree)/tools/build/Makefile.include + +# +# We need the following to be outside of kernel tree +# +$(OUTPUT)include/linux/counter.h: ../../include/uapi/linux/counter.h + mkdir -p $(OUTPUT)include/linux 2>&1 || true + ln -sf $(CURDIR)/../../include/uapi/linux/counter.h $@ + +prepare: $(OUTPUT)include/linux/counter.h + +COUNTER_EXAMPLE := $(OUTPUT)counter_example.o +$(COUNTER_EXAMPLE): prepare FORCE + $(Q)$(MAKE) $(build)=counter_example +$(OUTPUT)counter_example: $(COUNTER_EXAMPLE) + $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ + +clean: + rm -f $(ALL_PROGRAMS) + rm -rf $(OUTPUT)include/linux/counter.h + find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete + +install: $(ALL_PROGRAMS) + install -d -m 755 $(DESTDIR)$(bindir); \ + for program in $(ALL_PROGRAMS); do \ + install $$program $(DESTDIR)$(bindir); \ + done + +FORCE: + +.PHONY: all install clean FORCE prepare diff --git a/tools/counter/counter_example.c b/tools/counter/counter_example.c new file mode 100644 index 000000000000..be55287b950f --- /dev/null +++ b/tools/counter/counter_example.c @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Counter - example userspace application + * + * The userspace application opens /dev/counter0, configures the + * COUNTER_EVENT_INDEX event channel 0 to gather Count 0 count and Count + * 1 count, and prints out the data as it becomes available on the + * character device node. + * + * Copyright (C) 2021 William Breathitt Gray + */ +#include +#include +#include +#include +#include +#include +#include + +static struct counter_watch watches[2] = { + { + /* Component data: Count 0 count */ + .component.type = COUNTER_COMPONENT_COUNT, + .component.scope = COUNTER_SCOPE_COUNT, + .component.parent = 0, + /* Event type: Index */ + .event = COUNTER_EVENT_INDEX, + /* Device event channel 0 */ + .channel = 0, + }, + { + /* Component data: Count 1 count */ + .component.type = COUNTER_COMPONENT_COUNT, + .component.scope = COUNTER_SCOPE_COUNT, + .component.parent = 1, + /* Event type: Index */ + .event = COUNTER_EVENT_INDEX, + /* Device event channel 0 */ + .channel = 0, + }, +}; + +int main(void) +{ + int fd; + int ret; + int i; + struct counter_event event_data[2]; + + fd = open("/dev/counter0", O_RDWR); + if (fd == -1) { + perror("Unable to open /dev/counter0"); + return 1; + } + + for (i = 0; i < 2; i++) { + ret = ioctl(fd, COUNTER_ADD_WATCH_IOCTL, watches + i); + if (ret == -1) { + fprintf(stderr, "Error adding watches[%d]: %s\n", i, + strerror(errno)); + return 1; + } + } + ret = ioctl(fd, COUNTER_ENABLE_EVENTS_IOCTL); + if (ret == -1) { + perror("Error enabling events"); + return 1; + } + + for (;;) { + ret = read(fd, event_data, sizeof(event_data)); + if (ret == -1) { + perror("Failed to read event data"); + return 1; + } + + if (ret != sizeof(event_data)) { + fprintf(stderr, "Failed to read event data\n"); + return -EIO; + } + + printf("Timestamp 0: %llu\tCount 0: %llu\n" + "Error Message 0: %s\n" + "Timestamp 1: %llu\tCount 1: %llu\n" + "Error Message 1: %s\n", + event_data[0].timestamp, event_data[0].value, + strerror(event_data[0].status), + event_data[1].timestamp, event_data[1].value, + strerror(event_data[1].status)); + } + + return 0; +} -- 2.33.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DC59C433F5 for ; Wed, 29 Sep 2021 03:20:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1562361247 for ; Wed, 29 Sep 2021 03:20:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 1562361247 Authentication-Results: mail.kernel.org; dmarc=fail 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SMTP id u18mr3646172pjn.69.1632885413301; Tue, 28 Sep 2021 20:16:53 -0700 (PDT) Received: from localhost.localdomain ([156.146.35.76]) by smtp.gmail.com with ESMTPSA id 65sm464203pfv.210.2021.09.28.20.16.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Sep 2021 20:16:52 -0700 (PDT) From: William Breathitt Gray To: jic23@kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de, a.fatoum@pengutronix.de, kamel.bouhara@bootlin.com, gwendal@chromium.org, alexandre.belloni@bootlin.com, david@lechnology.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com, patrick.havelange@essensium.com, fabrice.gasnier@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, o.rempel@pengutronix.de, jarkko.nikula@linux.intel.com, William Breathitt Gray , Pavel Machek Subject: [PATCH v17 4/9] tools/counter: Create Counter tools Date: Wed, 29 Sep 2021 12:16:01 +0900 Message-Id: <7c0f975ba098952122302d258ec9ffdef04befaf.1632884256.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210928_201654_131199_001923EA X-CRM114-Status: GOOD ( 24.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org VGhpcyBjcmVhdGVzIGFuIGV4YW1wbGUgQ291bnRlciBwcm9ncmFtIHVuZGVyIHRvb2xzL2NvdW50 ZXIvKgp0byBleGVtcGxpZnkgdGhlIENvdW50ZXIgY2hhcmFjdGVyIGRldmljZSBpbnRlcmZhY2Uu CgpDYzogUGF2ZWwgTWFjaGVrIDxwYXZlbEB1Y3cuY3o+ClNpZ25lZC1vZmYtYnk6IFdpbGxpYW0g QnJlYXRoaXR0IEdyYXkgPHZpbGhlbG0uZ3JheUBnbWFpbC5jb20+Ci0tLQogTUFJTlRBSU5FUlMg 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