From patchwork Wed Sep 27 10:22:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nirmoy Das X-Patchwork-Id: 13400627 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 31045E810BD for ; Wed, 27 Sep 2023 10:23:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0812910E03D; Wed, 27 Sep 2023 10:23:22 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7A18410E03D; Wed, 27 Sep 2023 10:23:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695810200; x=1727346200; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=4AwzCmdIVsBShkNTVJTgG/O9iQ0HAbqAsMHzTJRLx5U=; b=Apnv7tATJjP2G+6QxtbY3KbD9YWMGMyKrrtKOchRVg+55qFZxlMK0utb JhqJCe6MiugpZyb8+S03jv6HwyBEDCcB3xVNuQqNQUVdcM+CiXk/1e4+f E1SFQ1Gk72REXSi1LceZNnsyRzGerSKCttYzg4G9jIIIPlNBT92rREVRB 9/qr2b/An/DhjpSmBGJkdlRydZY0Pk1h1d9rJwKPX8bHqVJ9yXqUWNySI ubimDuPdifRROOXwvNcui9ZJs3OxcmDl/0WyP2YeEvWe1Uu6Opvm8S3AU HOGT96WAHCFepUpfw3j3NXSNAmQhcv61QNmXLS5zfMJfPi7FpTTrsqUcO g==; X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="384579327" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="384579327" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 03:22:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="1080093585" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="1080093585" Received: from nirmoyda-desk.igk.intel.com ([10.102.138.190]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 03:22:46 -0700 From: Nirmoy Das To: intel-gfx@lists.freedesktop.org Subject: [PATCH 1/3] drm/i915: Introduce intel_gt_mcr_lock_reset() Date: Wed, 27 Sep 2023 12:22:35 +0200 Message-ID: <20230927102237.30773-1-nirmoy.das@intel.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Organization: Intel Deutschland GmbH, Registered Address: Am Campeon 10, 85579 Neubiberg, Germany, Commercial Register: Amtsgericht Muenchen HRB 186928 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: matthew.d.roper@intel.com, andi.shyti@linux.intel.com, dri-devel@lists.freedesktop.org, Nirmoy Das Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Implement intel_gt_mcr_lock_reset() to provide a mechanism for resetting the steer semaphore when absolutely necessary. Signed-off-by: Nirmoy Das --- drivers/gpu/drm/i915/gt/intel_gt_mcr.c | 29 ++++++++++++++++++++++++++ drivers/gpu/drm/i915/gt/intel_gt_mcr.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c index bf4a933de03a..d98e0d2fc2ee 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c @@ -419,6 +419,35 @@ void intel_gt_mcr_unlock(struct intel_gt *gt, unsigned long flags) intel_uncore_write_fw(gt->uncore, MTL_STEER_SEMAPHORE, 0x1); } +/** + * intel_gt_mcr_lock_reset - Reset MCR steering lock + * @gt: GT structure + * + * Performs a steer semaphore reset operation. On MTL and beyond, a hardware + * lock will also be taken to serialize access not only for the driver, + * but also for external hardware and firmware agents. + * However, there may be situations where the driver must reset the semaphore + * but only when it is absolutely certain that no other agent should own the + * lock at that given time. + * + * Context: Takes gt->mcr_lock. uncore->lock should *not* be held when this + * function is called, although it may be acquired after this + * function call. + */ +void intel_gt_mcr_lock_reset(struct intel_gt *gt) +{ + unsigned long __flags; + + lockdep_assert_not_held(>->uncore->lock); + + spin_lock_irqsave(>->mcr_lock, __flags); + + if (GRAPHICS_VER_FULL(gt->i915) >= IP_VER(12, 70)) + intel_uncore_write_fw(gt->uncore, MTL_STEER_SEMAPHORE, 0x1); + + spin_unlock_irqrestore(>->mcr_lock, __flags); +} + /** * intel_gt_mcr_read - read a specific instance of an MCR register * @gt: GT structure diff --git a/drivers/gpu/drm/i915/gt/intel_gt_mcr.h b/drivers/gpu/drm/i915/gt/intel_gt_mcr.h index 41684495b7da..485c7711f2e8 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_mcr.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_mcr.h @@ -11,6 +11,7 @@ void intel_gt_mcr_init(struct intel_gt *gt); void intel_gt_mcr_lock(struct intel_gt *gt, unsigned long *flags); void intel_gt_mcr_unlock(struct intel_gt *gt, unsigned long flags); +void intel_gt_mcr_lock_reset(struct intel_gt *gt); u32 intel_gt_mcr_read(struct intel_gt *gt, i915_mcr_reg_t reg, From patchwork Wed Sep 27 10:22:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nirmoy Das X-Patchwork-Id: 13400628 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 54E57E810BD for ; Wed, 27 Sep 2023 10:23:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 561BE10E4C9; Wed, 27 Sep 2023 10:23:22 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id E98D110E03D; Wed, 27 Sep 2023 10:23:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695810200; x=1727346200; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oUN1ZFIU+w+ZKAhlUs03JDqXGLzEy5Smcph0ZIGqvlc=; b=S2Vm+rlfO25DPLMwQopzMPyVnGjeR9SaO0GRet0rkY3EwsE3AsAKRsh4 Z4dqlCpE5LZvFXw234eBLJW9qCLcOcHOG9A7pEcnC13QKEARs9V3RlWVw FxvEZvod/Ww18MGkkbYcLVstWU218jq1rAXKMvw3L6A8h20fideu9BjUQ scuLL13j4ZH5iADZzY5o3bJkWwWJjjwkHdE7/K7P94zmHKlbaQ0nvp7w2 QHikWlgbwv9EJJqd3u4Wimd2QMHows7FvdtztV5bi4h6+O3AkopbmzZMO L5zrOkJNEXXm047K9KlCFbl8RWN1xWCVSieinyh6rhAvxBB9kiSJfsN1F Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="384579329" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="384579329" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 03:22:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="1080093607" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="1080093607" Received: from nirmoyda-desk.igk.intel.com ([10.102.138.190]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 03:22:47 -0700 From: Nirmoy Das To: intel-gfx@lists.freedesktop.org Subject: [PATCH 2/3] drm/i915: Reset steer semaphore for media GT Date: Wed, 27 Sep 2023 12:22:36 +0200 Message-ID: <20230927102237.30773-2-nirmoy.das@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927102237.30773-1-nirmoy.das@intel.com> References: <20230927102237.30773-1-nirmoy.das@intel.com> MIME-Version: 1.0 Organization: Intel Deutschland GmbH, Registered Address: Am Campeon 10, 85579 Neubiberg, Germany, Commercial Register: Amtsgericht Muenchen HRB 186928 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: matthew.d.roper@intel.com, andi.shyti@linux.intel.com, dri-devel@lists.freedesktop.org, Nirmoy Das Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" During resime, the steer semaphore on GT1 was observed to be held. The hardware team has confirmed the safety of clearing the steer semaphore during driver load/resume, as no lock acquisitions can occur in this process by other agents. Signed-off-by: Nirmoy Das Reviewed-by: Andi Shyti --- drivers/gpu/drm/i915/gt/intel_gt.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 93062c35e072..f6d9aba9ebb0 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -686,6 +686,17 @@ int intel_gt_init(struct intel_gt *gt) if (err) return err; + /* + * Reset the steer semaphore on GT1, as we have observed it + * remaining held after a suspend operation. Confirmation + * from the hardware team ensures the safety of resetting + * the steer semaphore during driver load/resume, as there + * are no lock acquisitions during this process by other + * agents. + */ + if (MEDIA_VER(gt->i915) >= 13 && gt->type == GT_MEDIA) + intel_gt_mcr_lock_reset(gt); + intel_gt_init_workarounds(gt); /* From patchwork Wed Sep 27 10:22:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nirmoy Das X-Patchwork-Id: 13400629 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 864FAE810BF for ; Wed, 27 Sep 2023 10:23:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8ABA610E4CC; 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27 Sep 2023 03:22:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10845"; a="1080093630" X-IronPort-AV: E=Sophos;i="6.03,179,1694761200"; d="scan'208";a="1080093630" Received: from nirmoyda-desk.igk.intel.com ([10.102.138.190]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2023 03:22:49 -0700 From: Nirmoy Das To: intel-gfx@lists.freedesktop.org Subject: [PATCH v4 3/3] drm/i915/mtl: Skip MCR ops for ring fault register Date: Wed, 27 Sep 2023 12:22:37 +0200 Message-ID: <20230927102237.30773-3-nirmoy.das@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927102237.30773-1-nirmoy.das@intel.com> References: <20230927102237.30773-1-nirmoy.das@intel.com> MIME-Version: 1.0 Organization: Intel Deutschland GmbH, Registered Address: Am Campeon 10, 85579 Neubiberg, Germany, Commercial Register: Amtsgericht Muenchen HRB 186928 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrzej Hajda , matthew.d.roper@intel.com, andi.shyti@linux.intel.com, dri-devel@lists.freedesktop.org, Nirmoy Das Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On MTL GEN12_RING_FAULT_REG is not replicated so don't do mcr based operation for this register. v2: use MEDIA_VER() instead of GRAPHICS_VER()(Matt). v3: s/"MEDIA_VER(i915) == 13"/"MEDIA_VER(i915) >= 13"(Matt) improve comment. v4: improve the comment further(Andi) Signed-off-by: Nirmoy Das Reviewed-by: Matt Roper Reviewed-by: Andi Shyti Reviewed-by: Andrzej Hajda --- drivers/gpu/drm/i915/gt/intel_gt.c | 13 ++++++++++++- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 + drivers/gpu/drm/i915/i915_gpu_error.c | 11 ++++++++++- 3 files changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index f6d9aba9ebb0..3578b78d5a2f 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -262,10 +262,21 @@ intel_gt_clear_error_registers(struct intel_gt *gt, I915_MASTER_ERROR_INTERRUPT); } - if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) { + /* + * For the media GT, this ring fault register is not replicated, + * so don't do multicast/replicated register read/write operation on it. + */ + if (MEDIA_VER(i915) >= 13 && gt->type == GT_MEDIA) { + intel_uncore_rmw(uncore, XELPMP_RING_FAULT_REG, + RING_FAULT_VALID, 0); + intel_uncore_posting_read(uncore, + XELPMP_RING_FAULT_REG); + + } else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) { intel_gt_mcr_multicast_rmw(gt, XEHP_RING_FAULT_REG, RING_FAULT_VALID, 0); intel_gt_mcr_read_any(gt, XEHP_RING_FAULT_REG); + } else if (GRAPHICS_VER(i915) >= 12) { intel_uncore_rmw(uncore, GEN12_RING_FAULT_REG, RING_FAULT_VALID, 0); intel_uncore_posting_read(uncore, GEN12_RING_FAULT_REG); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index cca4bac8f8b0..eecd0a87a647 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1084,6 +1084,7 @@ #define GEN12_RING_FAULT_REG _MMIO(0xcec4) #define XEHP_RING_FAULT_REG MCR_REG(0xcec4) +#define XELPMP_RING_FAULT_REG _MMIO(0xcec4) #define GEN8_RING_FAULT_ENGINE_ID(x) (((x) >> 12) & 0x7) #define RING_FAULT_GTTSEL_MASK (1 << 11) #define RING_FAULT_SRCID(x) (((x) >> 3) & 0xff) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index f4ebcfb70289..b4e31e59c799 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1234,7 +1234,16 @@ static void engine_record_registers(struct intel_engine_coredump *ee) if (GRAPHICS_VER(i915) >= 6) { ee->rc_psmi = ENGINE_READ(engine, RING_PSMI_CTL); - if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) + /* + * For the media GT, this ring fault register is not replicated, + * so don't do multicast/replicated register read/write + * operation on it. + */ + if (MEDIA_VER(i915) >= 13 && engine->gt->type == GT_MEDIA) + ee->fault_reg = intel_uncore_read(engine->uncore, + XELPMP_RING_FAULT_REG); + + else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) ee->fault_reg = intel_gt_mcr_read_any(engine->gt, XEHP_RING_FAULT_REG); else if (GRAPHICS_VER(i915) >= 12)