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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A5E42C78854 for ; Fri, 20 Sep 2024 14:09:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 74DC810E14D; Fri, 20 Sep 2024 14:09:34 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="lG3RvYoK"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8F66C10E840 for ; Fri, 20 Sep 2024 14:09:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1726841371; x=1758377371; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JiYp0JTKsse6P3reeYD55+C11gx5sAfAGQi1wDVAsrs=; b=lG3RvYoKPeX72y0LRjFZYng2YGdpNZOGDMFDKAdbeeZaQXnTkgiO3Cyy IG8Wr0MX2k0imvKl8OdMblRVubOLGmY73iCoMDFoHk87vm3ZCCVWGbyOQ pE3aD7rK6tVRiuJKGZOf/yCXFhAw7tS5dFN++OC3q/J4RlkWxZioarLOn RAjFAU5O6JsQxC87j9T0PJ3RPL77qLUvCAYtDk7hc4j0QXMflAYb/Z6VG DsQLHsZMUrX8NwpJqk6n+Bf05ssd4BW2H2CWBf3YM3uKZICGtjNtW+gvI iVxze/YLPpoGiavlpGxGodvoSf6AiBVOCCWYhQAGBM28zPLJVJos+CA3H g==; X-CSE-ConnectionGUID: JEqNOQ6gQ9OIDRNWci5tMQ== X-CSE-MsgGUID: e5kNQUkqRPKdEc18ef/HJg== X-IronPort-AV: E=McAfee;i="6700,10204,11200"; a="43368355" X-IronPort-AV: E=Sophos;i="6.10,244,1719903600"; d="scan'208";a="43368355" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Sep 2024 07:09:30 -0700 X-CSE-ConnectionGUID: lZgj02Q3QeGeKFa+w62RNg== X-CSE-MsgGUID: Y1oZbu7DSGe0qg5E1w5eSg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,244,1719903600"; d="scan'208";a="70182652" Received: from bnilawar-desk1.iind.intel.com ([10.145.169.59]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Sep 2024 07:09:29 -0700 From: Badal Nilawar To: intel-xe@lists.freedesktop.org Cc: anshuman.gupta@intel.com, john.c.harrison@intel.com Subject: [CI 07/12] drm/print: Introduce drm_line_printer Date: Fri, 20 Sep 2024 19:59:17 +0530 Message-Id: <20240920142922.618649-8-badal.nilawar@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240920142922.618649-1-badal.nilawar@intel.com> References: <20240920142922.618649-1-badal.nilawar@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" From: Michal Wajdeczko This drm printer wrapper can be used to increase the robustness of the captured output generated by any other drm_printer to make sure we didn't lost any intermediate lines of the output by adding line numbers to each output line. Helpful for capturing some crash data. v2: Extended short int counters to full int (JohnH) Signed-off-by: Michal Wajdeczko Cc: Jani Nikula Cc: John Harrison Cc: dri-devel@lists.freedesktop.org Reviewed-by: Jani Nikula --- drivers/gpu/drm/drm_print.c | 14 ++++++++ include/drm/drm_print.h | 64 +++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index 0081190201a7..08cfea04e22b 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -235,6 +235,20 @@ void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf) } EXPORT_SYMBOL(__drm_printfn_err); +void __drm_printfn_line(struct drm_printer *p, struct va_format *vaf) +{ + unsigned int counter = ++p->line.counter; + const char *prefix = p->prefix ?: ""; + const char *pad = p->prefix ? " " : ""; + + if (p->line.series) + drm_printf(p->arg, "%s%s%u.%u: %pV", + prefix, pad, p->line.series, counter, vaf); + else + drm_printf(p->arg, "%s%s%u: %pV", prefix, pad, counter, vaf); +} +EXPORT_SYMBOL(__drm_printfn_line); + /** * drm_puts - print a const string to a &drm_printer stream * @p: the &drm printer diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index d2676831d765..b3906dc04388 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -177,6 +177,10 @@ struct drm_printer { void *arg; const void *origin; const char *prefix; + struct { + unsigned int series; + unsigned int counter; + } line; enum drm_debug_category category; }; @@ -187,6 +191,7 @@ void __drm_puts_seq_file(struct drm_printer *p, const char *str); void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf); void __drm_printfn_dbg(struct drm_printer *p, struct va_format *vaf); void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf); +void __drm_printfn_line(struct drm_printer *p, struct va_format *vaf); __printf(2, 3) void drm_printf(struct drm_printer *p, const char *f, ...); @@ -411,6 +416,65 @@ static inline struct drm_printer drm_err_printer(struct drm_device *drm, return p; } +/** + * drm_line_printer - construct a &drm_printer that prefixes outputs with line numbers + * @p: the &struct drm_printer which actually generates the output + * @prefix: optional output prefix, or NULL for no prefix + * @series: optional unique series identifier, or 0 to omit identifier in the output + * + * This printer can be used to increase the robustness of the captured output + * to make sure we didn't lost any intermediate lines of the output. Helpful + * while capturing some crash data. + * + * Example 1:: + * + * void crash_dump(struct drm_device *drm) + * { + * static unsigned int id; + * struct drm_printer p = drm_err_printer(drm, "crash"); + * struct drm_printer lp = drm_line_printer(&p, "dump", ++id); + * + * drm_printf(&lp, "foo"); + * drm_printf(&lp, "bar"); + * } + * + * Above code will print into the dmesg something like:: + * + * [ ] 0000:00:00.0: [drm] *ERROR* crash dump 1.1: foo + * [ ] 0000:00:00.0: [drm] *ERROR* crash dump 1.2: bar + * + * Example 2:: + * + * void line_dump(struct device *dev) + * { + * struct drm_printer p = drm_info_printer(dev); + * struct drm_printer lp = drm_line_printer(&p, NULL, 0); + * + * drm_printf(&lp, "foo"); + * drm_printf(&lp, "bar"); + * } + * + * Above code will print:: + * + * [ ] 0000:00:00.0: [drm] 1: foo + * [ ] 0000:00:00.0: [drm] 2: bar + * + * RETURNS: + * The &drm_printer object + */ +static inline struct drm_printer drm_line_printer(struct drm_printer *p, + const char *prefix, + unsigned int series) +{ + struct drm_printer lp = { + .printfn = __drm_printfn_line, + .arg = p, + .prefix = prefix, + .line = { .series = series, }, + }; + return lp; +} + /* * struct device based logging * -- 2.34.1