From patchwork Thu Oct 17 23:58:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Fosha, Robert M" X-Patchwork-Id: 11197339 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A420213BD for ; Fri, 18 Oct 2019 00:05:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 8B1BC21D7C for ; Fri, 18 Oct 2019 00:05:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8B1BC21D7C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5729C6E0D4; Fri, 18 Oct 2019 00:05:35 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 18CBC6E0D4 for ; Fri, 18 Oct 2019 00:05:33 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Oct 2019 17:05:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,309,1566889200"; d="scan'208";a="397767031" Received: from rmfosha-dev-1.fm.intel.com ([10.19.83.123]) by fmsmga006.fm.intel.com with ESMTP; 17 Oct 2019 17:05:32 -0700 From: "Robert M. Fosha" To: intel-gfx@lists.freedesktop.org Date: Thu, 17 Oct 2019 16:58:48 -0700 Message-Id: <20191017235849.21349-1-robert.m.fosha@intel.com> X-Mailer: git-send-email 2.21.0.5.gaeb582a983 MIME-Version: 1.0 Subject: [Intel-gfx] [RESEND PATCH 1/2] drm/i915/guc: Enable guc logging on guc log relay write X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Creating and opening the GuC log relay file enables and starts the relay potentially before the caller is ready to consume logs. Change the behavior so that relay starts only on an explicit call to the write function (with a value of '1'). Other values flush the log relay as before. v2: Style changes and fix typos. Add guc_log_relay_stop() function. (Daniele) Cc: Matthew Brost Cc: Daniele Ceraolo Spurio Cc: Michal Wajdeczko Signed-off-by: Robert M. Fosha Reviewed-by: Matthew Brost --- drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 53 +++++++++++++++++----- drivers/gpu/drm/i915/gt/uc/intel_guc_log.h | 4 +- drivers/gpu/drm/i915/i915_debugfs.c | 22 +++++++-- 3 files changed, 62 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c index 2cf2d3314f62..caed0d57e704 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c @@ -226,7 +226,7 @@ static void guc_read_update_log_buffer(struct intel_guc_log *log) mutex_lock(&log->relay.lock); - if (WARN_ON(!intel_guc_log_relay_enabled(log))) + if (WARN_ON(!intel_guc_log_relay_created(log))) goto out_unlock; /* Get the pointer to shared GuC log buffer */ @@ -361,6 +361,7 @@ void intel_guc_log_init_early(struct intel_guc_log *log) { mutex_init(&log->relay.lock); INIT_WORK(&log->relay.flush_work, capture_logs_work); + log->relay.started = false; } static int guc_log_relay_create(struct intel_guc_log *log) @@ -546,7 +547,7 @@ int intel_guc_log_set_level(struct intel_guc_log *log, u32 level) return ret; } -bool intel_guc_log_relay_enabled(const struct intel_guc_log *log) +bool intel_guc_log_relay_created(const struct intel_guc_log *log) { return log->relay.buf_addr; } @@ -560,7 +561,7 @@ int intel_guc_log_relay_open(struct intel_guc_log *log) mutex_lock(&log->relay.lock); - if (intel_guc_log_relay_enabled(log)) { + if (intel_guc_log_relay_created(log)) { ret = -EEXIST; goto out_unlock; } @@ -585,6 +586,21 @@ int intel_guc_log_relay_open(struct intel_guc_log *log) mutex_unlock(&log->relay.lock); + return 0; + +out_relay: + guc_log_relay_destroy(log); +out_unlock: + mutex_unlock(&log->relay.lock); + + return ret; +} + +int intel_guc_log_relay_start(struct intel_guc_log *log) +{ + if (log->relay.started) + return -EEXIST; + guc_log_enable_flush_events(log); /* @@ -594,14 +610,9 @@ int intel_guc_log_relay_open(struct intel_guc_log *log) */ queue_work(system_highpri_wq, &log->relay.flush_work); - return 0; - -out_relay: - guc_log_relay_destroy(log); -out_unlock: - mutex_unlock(&log->relay.lock); + log->relay.started = true; - return ret; + return 0; } void intel_guc_log_relay_flush(struct intel_guc_log *log) @@ -609,6 +620,9 @@ void intel_guc_log_relay_flush(struct intel_guc_log *log) struct intel_guc *guc = log_to_guc(log); intel_wakeref_t wakeref; + if (!log->relay.started) + return; + /* * Before initiating the forceful flush, wait for any pending/ongoing * flush to complete otherwise forceful flush may not actually happen. @@ -622,18 +636,33 @@ void intel_guc_log_relay_flush(struct intel_guc_log *log) guc_log_capture_logs(log); } -void intel_guc_log_relay_close(struct intel_guc_log *log) +/* + * Stops the relay log. Called from intel_guc_log_relay_close(), so no + * possibility of race with start/flush since relay_write cannot race + * relay_close. + */ +static void guc_log_relay_stop(struct intel_guc_log *log) { struct intel_guc *guc = log_to_guc(log); struct drm_i915_private *i915 = guc_to_gt(guc)->i915; + if (!log->relay.started) + return; + guc_log_disable_flush_events(log); intel_synchronize_irq(i915); flush_work(&log->relay.flush_work); + log->relay.started = false; +} + +void intel_guc_log_relay_close(struct intel_guc_log *log) +{ + guc_log_relay_stop(log); + mutex_lock(&log->relay.lock); - GEM_BUG_ON(!intel_guc_log_relay_enabled(log)); + GEM_BUG_ON(!intel_guc_log_relay_created(log)); guc_log_unmap(log); guc_log_relay_destroy(log); mutex_unlock(&log->relay.lock); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.h index 6f764879acb1..c252c022c5fc 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.h @@ -47,6 +47,7 @@ struct intel_guc_log { struct i915_vma *vma; struct { void *buf_addr; + bool started; struct work_struct flush_work; struct rchan *channel; struct mutex lock; @@ -65,8 +66,9 @@ int intel_guc_log_create(struct intel_guc_log *log); void intel_guc_log_destroy(struct intel_guc_log *log); int intel_guc_log_set_level(struct intel_guc_log *log, u32 level); -bool intel_guc_log_relay_enabled(const struct intel_guc_log *log); +bool intel_guc_log_relay_created(const struct intel_guc_log *log); int intel_guc_log_relay_open(struct intel_guc_log *log); +int intel_guc_log_relay_start(struct intel_guc_log *log); void intel_guc_log_relay_flush(struct intel_guc_log *log); void intel_guc_log_relay_close(struct intel_guc_log *log); diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index ada57eee914a..ad536d82e60f 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1866,8 +1866,8 @@ static void i915_guc_log_info(struct seq_file *m, struct intel_guc_log *log = &dev_priv->gt.uc.guc.log; enum guc_log_buffer_type type; - if (!intel_guc_log_relay_enabled(log)) { - seq_puts(m, "GuC log relay disabled\n"); + if (!intel_guc_log_relay_created(log)) { + seq_puts(m, "GuC log relay not created\n"); return; } @@ -2054,9 +2054,23 @@ i915_guc_log_relay_write(struct file *filp, loff_t *ppos) { struct intel_guc_log *log = filp->private_data; + int val; + int ret; - intel_guc_log_relay_flush(log); - return cnt; + ret = kstrtoint_from_user(ubuf, cnt, 0, &val); + if (ret < 0) + return ret; + + /* + * Enable and start the guc log relay on value of 1. + * Flush log relay for any other value. + */ + if (val == 1) + ret = intel_guc_log_relay_start(log); + else + intel_guc_log_relay_flush(log); + + return ret ?: cnt; } static int i915_guc_log_relay_release(struct inode *inode, struct file *file)