From patchwork Thu Apr 7 17:21:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Gordon X-Patchwork-Id: 8775281 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 19B55C0553 for ; Thu, 7 Apr 2016 17:21:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EAE43201C7 for ; Thu, 7 Apr 2016 17:21:57 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id BEEE8201CD for ; Thu, 7 Apr 2016 17:21:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 689176E9EF; Thu, 7 Apr 2016 17:21:56 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 833DD6E9F1 for ; Thu, 7 Apr 2016 17:21:54 +0000 (UTC) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 07 Apr 2016 10:21:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,449,1455004800"; d="scan'208";a="950291444" Received: from dsgordon-linux2.isw.intel.com ([10.102.226.88]) by orsmga002.jf.intel.com with ESMTP; 07 Apr 2016 10:21:41 -0700 From: Dave Gordon To: intel-gfx@lists.freedesktop.org Date: Thu, 7 Apr 2016 18:21:18 +0100 Message-Id: <1460049678-21918-7-git-send-email-david.s.gordon@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1460049678-21918-1-git-send-email-david.s.gordon@intel.com> References: <1460049678-21918-1-git-send-email-david.s.gordon@intel.com> Organization: Intel Corporation (UK) Ltd. - Co. Reg. #1134945 - Pipers Way, Swindon SN3 1RJ Subject: [Intel-gfx] [PATCH v4 6/6] DO NOT MERGE: add enable_guc_loading parameter 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-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Split the function of "enable_guc_submission" into two separate options. The new one "enable_guc_loading" controls only the *fetching and loading* of the GuC firmware image. The existing one is redefined to control only the *use* of the GuC for batch submission once the firmware is loaded. In addition, the degree of control has been refined from a simple bool to an integer key, allowing several options: -1 (default) whatever the platform default is 0 DISABLE don't load/use the GuC 1 BEST EFFORT try to load/use the GuC, fallback if not available 2 REQUIRE must load/use the GuC, else leave the GPU wedged The new platform default (as coded here) will be to attempt to load the GuC iff the device has a GuC that requires firmware, to attempt to use it iff the device has a GuC that supports the submission protocol (with or without firmware), and to fall back to execlist mode if any required firmware cannot be found or fails to load. Signed-off-by: Dave Gordon --- drivers/gpu/drm/i915/i915_gem.c | 1 - drivers/gpu/drm/i915/i915_params.c | 14 ++++- drivers/gpu/drm/i915/i915_params.h | 3 +- drivers/gpu/drm/i915/intel_guc_loader.c | 98 ++++++++++++++++++--------------- 4 files changed, 67 insertions(+), 49 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index b342f67..7a5fdfb 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4887,7 +4887,6 @@ int i915_gem_init_engines(struct drm_device *dev) ret = intel_guc_ucode_load(dev); if (ret) { DRM_ERROR("Failed to initialize GuC, error %d\n", ret); - ret = -EIO; goto out; } } diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 1779f02..21f325b 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -54,7 +54,8 @@ struct i915_params i915 __read_mostly = { .verbose_state_checks = 1, .nuclear_pageflip = 0, .edp_vswing = 0, - .enable_guc_submission = false, + .enable_guc_loading = -1, + .enable_guc_submission = -1, .guc_log_level = -1, .enable_dp_mst = true, .inject_load_failure = 0, @@ -197,8 +198,15 @@ struct i915_params i915 __read_mostly = { "(0=use value from vbt [default], 1=low power swing(200mV)," "2=default swing(400mV))"); -module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400); -MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)"); +module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400); +MODULE_PARM_DESC(enable_guc_submission, + "Enable GuC firmware loading " + "(-1=auto [default], 0=never, 1=if available, 2=required)"); + +module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400); +MODULE_PARM_DESC(enable_guc_submission, + "Enable GuC submission " + "(-1=auto [default], 0=never, 1=if available, 2=required)"); module_param_named(guc_log_level, i915.guc_log_level, int, 0400); MODULE_PARM_DESC(guc_log_level, diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 02bc278..9f1d17b 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -45,6 +45,8 @@ struct i915_params { int enable_ips; int invert_brightness; int enable_cmd_parser; + int enable_guc_loading; + int enable_guc_submission; int guc_log_level; int use_mmio_flip; int mmio_debug; @@ -57,7 +59,6 @@ struct i915_params { bool load_detect_test; bool reset; bool disable_display; - bool enable_guc_submission; bool verbose_state_checks; bool nuclear_pageflip; bool enable_dp_mst; diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c index 3e14a9a..7f54278 100644 --- a/drivers/gpu/drm/i915/intel_guc_loader.c +++ b/drivers/gpu/drm/i915/intel_guc_loader.c @@ -387,49 +387,37 @@ int intel_guc_ucode_load(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw; + const char *fw_path = guc_fw->guc_fw_path; int retries, err = 0; - if (!i915.enable_guc_submission) - return 0; - - DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n", + DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n", + fw_path, intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status), intel_guc_fw_status_repr(guc_fw->guc_fw_load_status)); - direct_interrupts_to_host(dev_priv); + /* Loading forbidden, or no firmware to load? */ + if (!i915.enable_guc_loading) + goto fail; + if (fw_path == NULL) + goto fail; + if (*fw_path == '\0') { + DRM_ERROR("No GuC firmware known for this platform\n"); + goto fail; + } - if (guc_fw->guc_fw_fetch_status == GUC_FIRMWARE_NONE) - return 0; + /* Fetch failed, or already fetched but failed to load? */ + if (guc_fw->guc_fw_fetch_status != GUC_FIRMWARE_SUCCESS) + goto fail; + if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL) + goto fail; - if (guc_fw->guc_fw_fetch_status == GUC_FIRMWARE_SUCCESS && - guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL) - return -ENOEXEC; + direct_interrupts_to_host(dev_priv); guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING; - DRM_DEBUG_DRIVER("GuC fw fetch status %s\n", - intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status)); - - switch (guc_fw->guc_fw_fetch_status) { - case GUC_FIRMWARE_FAIL: - /* something went wrong :( */ - err = -EIO; - goto fail; - - case GUC_FIRMWARE_NONE: - case GUC_FIRMWARE_PENDING: - default: - /* "can't happen" */ - WARN_ONCE(1, "GuC fw %s invalid guc_fw_fetch_status %s [%d]\n", - guc_fw->guc_fw_path, - intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status), - guc_fw->guc_fw_fetch_status); - err = -ENXIO; - goto fail; - - case GUC_FIRMWARE_SUCCESS: - break; - } + DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n", + intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status), + intel_guc_fw_status_repr(guc_fw->guc_fw_load_status)); err = i915_guc_submission_init(dev); if (err) @@ -480,6 +468,7 @@ int intel_guc_ucode_load(struct drm_device *dev) fail: DRM_ERROR("GuC firmware load failed, err %d\n", err); + if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_PENDING) guc_fw->guc_fw_load_status = GUC_FIRMWARE_FAIL; @@ -487,6 +476,29 @@ int intel_guc_ucode_load(struct drm_device *dev) i915_guc_submission_disable(dev); i915_guc_submission_fini(dev); + /* + * We've failed to load the firmware :( + * + * Decide whether to disable GuC submission and fall back to + * execlist mode, and whether to hide the error by returning + * zero or to return -EIO, which the caller will treat as a + * nonfatal error (i.e. it doesn't prevent driver load, but + * marks the GPU as wedged until reset). + */ + if (i915.enable_guc_loading > 1) { + err = -EIO; + } else if (HAS_GUC_SCHED(dev) && !HAS_GUC_UCODE(dev)) { + return 0; + } else if (i915.enable_guc_submission > 1) { + err = -EIO; + } else { + err = 0; + } + + i915.enable_guc_submission = 0; + + DRM_DEBUG_DRIVER("falling back to execlist mode, err %d\n", err); + return err; } @@ -628,8 +640,11 @@ void intel_guc_ucode_init(struct drm_device *dev) struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw; const char *fw_path; - if (!HAS_GUC_SCHED(dev)) - i915.enable_guc_submission = false; + /* A negative value means "use platform default" */ + if (i915.enable_guc_loading < 0) + i915.enable_guc_loading = HAS_GUC_UCODE(dev); + if (i915.enable_guc_submission < 0) + i915.enable_guc_submission = HAS_GUC_SCHED(dev); if (!HAS_GUC_UCODE(dev)) { fw_path = NULL; @@ -638,26 +653,21 @@ void intel_guc_ucode_init(struct drm_device *dev) guc_fw->guc_fw_major_wanted = 6; guc_fw->guc_fw_minor_wanted = 1; } else { - i915.enable_guc_submission = false; fw_path = ""; /* unknown device */ } - if (!i915.enable_guc_submission) - return; - guc_fw->guc_dev = dev; guc_fw->guc_fw_path = fw_path; guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE; guc_fw->guc_fw_load_status = GUC_FIRMWARE_NONE; + /* Early (and silent) return if GuC loading is disabled */ + if (!i915.enable_guc_loading) + return; if (fw_path == NULL) return; - - if (*fw_path == '\0') { - DRM_ERROR("No GuC firmware known for this platform\n"); - guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_FAIL; + if (*fw_path == '\0') return; - } guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_PENDING; DRM_DEBUG_DRIVER("GuC firmware pending, path %s\n", fw_path);