From patchwork Thu Apr 27 23:12:54 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michel Thierry X-Patchwork-Id: 9703739 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 14068602CC for ; Thu, 27 Apr 2017 23:13:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 11C6E285EA for ; Thu, 27 Apr 2017 23:13:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 06A7E2863B; Thu, 27 Apr 2017 23:13:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6F752285EA for ; Thu, 27 Apr 2017 23:13:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F372C6E71B; Thu, 27 Apr 2017 23:13:07 +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 2FE136E19D for ; Thu, 27 Apr 2017 23:13:03 +0000 (UTC) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP; 27 Apr 2017 16:13:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,386,1488873600"; d="scan'208";a="81571443" Received: from relo-linux-11.sc.intel.com ([10.3.160.214]) by orsmga004.jf.intel.com with ESMTP; 27 Apr 2017 16:13:02 -0700 From: Michel Thierry To: intel-gfx@lists.freedesktop.org Date: Thu, 27 Apr 2017 16:12:54 -0700 Message-Id: <20170427231300.32841-15-michel.thierry@intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170427231300.32841-1-michel.thierry@intel.com> References: <20170427231300.32841-1-michel.thierry@intel.com> Subject: [Intel-gfx] [PATCH v7 14/20] drm/i915/guc: Add support for reset engine using GuC commands X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds per engine reset and recovery (TDR) support when GuC is used to submit workloads to GPU. In the case of i915 directly submission to ELSP, driver manages hang detection, recovery and resubmission. With GuC submission these tasks are shared between driver and GuC. i915 is still responsible for detecting a hang, and when it does it only requests GuC to reset that Engine. GuC internally manages acquiring forcewake and idling the engine before actually resetting it. Once the reset is successful, i915 takes over again and handles resubmission. The scheduler in i915 knows which requests are pending so after resetting a engine, pending workloads/requests are resubmitted again. v2: s/i915_guc_request_engine_reset/i915_guc_reset_engine/ to match the non-guc funtion names. v3: Removed debug message about engine restarting from which request, since the new baseline do it regardless of submission mode. (Chris) Signed-off-by: Arun Siluvery Signed-off-by: Jeff McGee Signed-off-by: Michel Thierry --- drivers/gpu/drm/i915/i915_drv.c | 42 +++++++++++++++++--------- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_guc_submission.c | 48 ++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_guc_fwif.h | 6 ++++ drivers/gpu/drm/i915/intel_uc.h | 1 + drivers/gpu/drm/i915/intel_uncore.c | 5 ---- 6 files changed, 84 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 426db8756e95..df8e2e8e3b7f 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1918,24 +1918,34 @@ int i915_reset_engine(struct intel_engine_cs *engine) */ i915_gem_reset_engine(engine, active_request); - /* forcing engine to idle */ - ret = intel_reset_engine_start(engine); - if (ret) { - DRM_ERROR("Failed to disable %s\n", engine->name); - goto out; - } + if (!dev_priv->guc.execbuf_client) { + /* forcing engine to idle */ + ret = intel_reset_engine_start(engine); + if (ret) { + DRM_ERROR("Failed to disable %s\n", engine->name); + goto out; + } - /* finally, reset engine */ - ret = intel_gpu_reset(dev_priv, intel_engine_flag(engine)); - if (ret) { - DRM_ERROR("Failed to reset %s, ret=%d\n", engine->name, ret); + /* finally, reset engine */ + ret = intel_gpu_reset(dev_priv, intel_engine_flag(engine)); + if (ret) { + DRM_ERROR("Failed to reset %s, ret=%d\n", + engine->name, ret); + intel_reset_engine_cancel(engine); + goto out; + } + + /* be sure the request reset bit gets cleared */ intel_reset_engine_cancel(engine); - goto out; + } else { + ret = i915_guc_reset_engine(engine); + if (ret) { + DRM_ERROR("GuC failed to reset %s, ret=%d\n", + engine->name, ret); + goto out; + } } - /* be sure the request reset bit gets cleared */ - intel_reset_engine_cancel(engine); - i915_gem_reset_finish_engine(engine); /* replay remaining requests in the queue */ @@ -1943,6 +1953,10 @@ int i915_reset_engine(struct intel_engine_cs *engine) if (ret) goto out; + /* for guc too */ + if (dev_priv->guc.execbuf_client) + i915_guc_submission_reenable_engine(engine); + error->reset_engine_count[engine->id]++; out: return ret; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index e9e04c92a376..cbefcd4b2507 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3032,6 +3032,7 @@ extern bool intel_has_reset_engine(struct drm_i915_private *dev_priv); extern int intel_reset_engine_start(struct intel_engine_cs *engine); extern void intel_reset_engine_cancel(struct intel_engine_cs *engine); extern int intel_reset_guc(struct drm_i915_private *dev_priv); +extern int i915_guc_reset_engine(struct intel_engine_cs *engine); extern void intel_engine_init_hangcheck(struct intel_engine_cs *engine); extern void intel_hangcheck_init(struct drm_i915_private *dev_priv); extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index 4d1784c84fd4..57815edfc4df 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -1344,6 +1344,25 @@ void i915_guc_submission_disable(struct drm_i915_private *dev_priv) guc->execbuf_client = NULL; } +void i915_guc_submission_reenable_engine(struct intel_engine_cs *engine) +{ + struct drm_i915_private *dev_priv = engine->i915; + struct intel_guc *guc = &dev_priv->guc; + struct i915_guc_client *client = guc->execbuf_client; + const int wqi_size = sizeof(struct guc_wq_item); + struct drm_i915_gem_request *rq; + + GEM_BUG_ON(!client); + intel_guc_sample_forcewake(guc); + + spin_lock_irq(&engine->timeline->lock); + list_for_each_entry(rq, &engine->timeline->requests, link) { + guc_client_update_wq_rsvd(client, wqi_size); + __i915_guc_submit(rq); + } + spin_unlock_irq(&engine->timeline->lock); +} + /** * intel_guc_suspend() - notify GuC entering suspend state * @dev_priv: i915 device private @@ -1395,3 +1414,32 @@ int intel_guc_resume(struct drm_i915_private *dev_priv) return intel_guc_send(guc, data, ARRAY_SIZE(data)); } + +int i915_guc_reset_engine(struct intel_engine_cs *engine) +{ + struct drm_i915_private *dev_priv = engine->i915; + struct intel_guc *guc = &dev_priv->guc; + struct i915_gem_context *ctx; + u32 data[7]; + + if (!i915.enable_guc_submission) + return 0; + + ctx = dev_priv->kernel_context; + + /* + * The affected context report is populated by GuC and is provided + * to the driver using the shared page. We request for it but don't + * use it as scheduler has all of these details. + */ + data[0] = INTEL_GUC_ACTION_REQUEST_ENGINE_RESET; + data[1] = engine->guc_id; + data[2] = INTEL_GUC_RESET_OPTION_REPORT_AFFECTED_CONTEXTS; + data[3] = 0; + data[4] = 0; + data[5] = guc->execbuf_client->stage_id; + /* first page is shared data with GuC */ + data[6] = guc_ggtt_offset(ctx->engine[RCS].state); + + return intel_guc_send(guc, data, ARRAY_SIZE(data)); +} diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h b/drivers/gpu/drm/i915/intel_guc_fwif.h index e6f8079df94a..081f2cf614e6 100644 --- a/drivers/gpu/drm/i915/intel_guc_fwif.h +++ b/drivers/gpu/drm/i915/intel_guc_fwif.h @@ -505,6 +505,7 @@ union guc_log_control { /* This Action will be programmed in C180 - SOFT_SCRATCH_O_REG */ enum intel_guc_action { INTEL_GUC_ACTION_DEFAULT = 0x0, + INTEL_GUC_ACTION_REQUEST_ENGINE_RESET = 0x3, INTEL_GUC_ACTION_SAMPLE_FORCEWAKE = 0x6, INTEL_GUC_ACTION_ALLOCATE_DOORBELL = 0x10, INTEL_GUC_ACTION_DEALLOCATE_DOORBELL = 0x20, @@ -518,6 +519,11 @@ enum intel_guc_action { INTEL_GUC_ACTION_LIMIT }; +/* Reset engine options */ +enum action_engine_reset_options { + INTEL_GUC_RESET_OPTION_REPORT_AFFECTED_CONTEXTS = 0x10, +}; + /* * The GuC sends its response to a command by overwriting the * command in SS0. The response is distinguishable from a command diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h index 2f0229da20bb..a348d08ce227 100644 --- a/drivers/gpu/drm/i915/intel_uc.h +++ b/drivers/gpu/drm/i915/intel_uc.h @@ -247,6 +247,7 @@ int i915_guc_wq_reserve(struct drm_i915_gem_request *rq); void i915_guc_wq_unreserve(struct drm_i915_gem_request *request); void i915_guc_submission_disable(struct drm_i915_private *dev_priv); void i915_guc_submission_fini(struct drm_i915_private *dev_priv); +void i915_guc_submission_reenable_engine(struct intel_engine_cs *engine); struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size); /* intel_guc_log.c */ diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 00251d83e7bd..cf1a74dc8595 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1781,14 +1781,9 @@ bool intel_has_gpu_reset(struct drm_i915_private *dev_priv) return intel_get_gpu_reset(dev_priv) != NULL; } -/* - * When GuC submission is enabled, GuC manages ELSP and can initiate the - * engine reset too. For now, fall back to full GPU reset if it is enabled. - */ bool intel_has_reset_engine(struct drm_i915_private *dev_priv) { return (dev_priv->info.has_reset_engine && - !dev_priv->guc.execbuf_client && i915.reset == 2); }