From patchwork Tue Sep 3 20:25:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Adri=C3=A1n_Larumbe?= X-Patchwork-Id: 825140 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3220D1D58BF; Tue, 3 Sep 2024 20:26:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725395184; cv=pass; b=QcWXT3TeRjr3MB34EY0d+FP5ptagIX9QUv7WQ93+NCc20MMMjCMtvNyGHEKzu1si+I4Ppwy5sWpub17UG6R1g0fQUloMCPPzHg06q0evtrScfAP/0NAVv+PTJQzPr0ybXdwP5TJw30QiMqjjFrhuBBzCSkEJQr2ZQOiiMFxdbIM= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725395184; c=relaxed/simple; bh=YdZ2DdOrTJDFkr8c/oJaKgykzTFrzwcLpFaAYmSUZzU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=AbQWpLzOr1ByqPf3HXz19IhCw9geR6EfMtTmpzLwpNxzQN8zLea/Sqt3lFdLJc4akiHbdmUNdOAg/KASYSLHursxD3GIq88FJM4X2uYCf5nITckKRcv8mPHopdoYyIEYVHWt0dkK7sbjTxtEUgQEqCAUjYcDITLRVCftKwu6ea8= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=ZCSHzAWj; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="ZCSHzAWj" ARC-Seal: i=1; a=rsa-sha256; t=1725395166; cv=none; d=zohomail.com; s=zohoarc; b=m1K9UV8esZGKz0vKWVafBmGl2luqEoWELrJEGlqEudisxAfCH4vOvdtheEy58ruAmfhQ9t4qIv4LV+r4qV/3cjlXoz7ZHcaE8Gk/wlnu0sdALgjnyy+IpVSVNT3y7f792h36eUvL5tBJ1CfbCGb/3di4rByLqJ2IA8FEMyNqGBM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1725395166; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=S4H1TvHBmLqicNFvkbMgMBC/nubwCjLcKnTiqllabKQ=; b=cLTr9OeDdr6uhrQkIHj3hoyJ5JtuwJkQsJZGDekRPEGA5t3HTDGMtRcUdNLCuExCfMaDL58NC/03Ry7hA0aqsxm86O7wuWKdwos+Eh15hr6QN1wBYItnBOqLVc/sxSrlX3QlUQPbLcJeXWIZYznwEXNgSMRDHFJxvWNoVSwEHsk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1725395166; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=S4H1TvHBmLqicNFvkbMgMBC/nubwCjLcKnTiqllabKQ=; b=ZCSHzAWjzS1zMDIDhRxAxElB6sd+6LtjInAURASYoWEvzgyjqXmYm32dFq+47zy0 KJyORlmIxNCxzcHrW5ODBjmr1vmNrKy7TL2gtiep/GrY9aoycwadfDqitoLHXE/9+4E UdJStkweJy9MO6mJBXlcMpETdrl+GzecaBNoGCY8= Received: by mx.zohomail.com with SMTPS id 1725395165743108.55172235697557; Tue, 3 Sep 2024 13:26:05 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= To: Boris Brezillon , Steven Price , Liviu Dudau , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= Cc: kernel@collabora.com, =?utf-8?q?Adri=C3=A1n_Larumbe?= , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org Subject: [PATCH v5 4/4] drm/panthor: add sysfs knob for enabling job profiling Date: Tue, 3 Sep 2024 21:25:38 +0100 Message-ID: <20240903202541.430225-5-adrian.larumbe@collabora.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240903202541.430225-1-adrian.larumbe@collabora.com> References: <20240903202541.430225-1-adrian.larumbe@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This commit introduces a DRM device sysfs attribute that lets UM control the job accounting status in the device. The knob variable had been brought in as part of a previous commit, but now we're able to fix it manually. As sysfs files are part of a driver's uAPI, describe its legitimate input values and output format in a documentation file. Signed-off-by: Adrián Larumbe --- Documentation/gpu/panthor.rst | 46 +++++++++++++++++++++++++++ drivers/gpu/drm/panthor/panthor_drv.c | 39 +++++++++++++++++++++++ 2 files changed, 85 insertions(+) create mode 100644 Documentation/gpu/panthor.rst diff --git a/Documentation/gpu/panthor.rst b/Documentation/gpu/panthor.rst new file mode 100644 index 000000000000..cbf5c4429a2d --- /dev/null +++ b/Documentation/gpu/panthor.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +========================= + drm/Panthor CSF driver +========================= + +.. _panfrost-usage-stats: + +Panthor DRM client usage stats implementation +============================================== + +The drm/Panthor driver implements the DRM client usage stats specification as +documented in :ref:`drm-client-usage-stats`. + +Example of the output showing the implemented key value pairs and entirety of +the currently possible format options: + +:: + pos: 0 + flags: 02400002 + mnt_id: 29 + ino: 491 + drm-driver: panthor + drm-client-id: 10 + drm-engine-panthor: 111110952750 ns + drm-cycles-panthor: 94439687187 + drm-maxfreq-panthor: 1000000000 Hz + drm-curfreq-panthor: 1000000000 Hz + drm-total-memory: 16480 KiB + drm-shared-memory: 0 + drm-active-memory: 16200 KiB + drm-resident-memory: 16480 KiB + drm-purgeable-memory: 0 + +Possible `drm-engine-` key names are: `panthor`. +`drm-curfreq-` values convey the current operating frequency for that engine. + +Users must bear in mind that engine and cycle sampling are disabled by default, +because of power saving concerns. `fdinfo` users and benchmark applications which +query the fdinfo file must make sure to toggle the job profiling status of the +driver by writing into the appropriate sysfs node:: + + echo > /sys/bus/platform/drivers/panthor/[a-f0-9]*.gpu/profiling + +Where `N` is a bit mask where cycle and timestamp sampling are respectively +enabled by the first and second bits. diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c index e18838754963..26475db96c41 100644 --- a/drivers/gpu/drm/panthor/panthor_drv.c +++ b/drivers/gpu/drm/panthor/panthor_drv.c @@ -1450,6 +1450,44 @@ static void panthor_remove(struct platform_device *pdev) panthor_device_unplug(ptdev); } +static ssize_t profiling_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct panthor_device *ptdev = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", ptdev->profile_mask); +} + +static ssize_t profiling_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct panthor_device *ptdev = dev_get_drvdata(dev); + u32 value; + int err; + + err = kstrtou32(buf, 0, &value); + if (err) + return err; + + if ((value & ~PANTHOR_DEVICE_PROFILING_ALL) != 0) + return -EINVAL; + + ptdev->profile_mask = value; + + return len; +} + +static DEVICE_ATTR_RW(profiling); + +static struct attribute *panthor_attrs[] = { + &dev_attr_profiling.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(panthor); + static const struct of_device_id dt_match[] = { { .compatible = "rockchip,rk3588-mali" }, { .compatible = "arm,mali-valhall-csf" }, @@ -1469,6 +1507,7 @@ static struct platform_driver panthor_driver = { .name = "panthor", .pm = pm_ptr(&panthor_pm_ops), .of_match_table = dt_match, + .dev_groups = panthor_groups, }, };