From patchwork Thu Jun 1 09:15:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Upadhyay, Tejas" X-Patchwork-Id: 13263211 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 49C54C77B7E for ; Thu, 1 Jun 2023 09:09:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CC0FF10E52E; Thu, 1 Jun 2023 09:09:47 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id A6E7810E52E for ; Thu, 1 Jun 2023 09:09:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685610585; x=1717146585; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Nut0thRDV2urZSn6VGTmLce8dgQV2ul0hYJzjbxbOuI=; b=LwdovcheNYafiP3e3iEVHBnAf0GV4VVxxcvCPedvqnpwOzFbXZZZnXBF i+xqQp4HpvkuRSrr04fA0TjaIoPWv7BXGsPJi0m67TqBjV0n6h6mWJhNO KudPyEMmEnUJvcX2Mcwpixk8Pj6IV1FCJw1G0VK8VkeTkTYcWNoOOPIne 0jGfST8/P4WkptgMYb0P19tFB7RckNwsEgY/v6KXAIRRoxBDXlaR+HDsd 7vyfKVhYsCkZJjWEb4YCKYnh6AUSFPmxKHbhJCB/SsnoETNv6UKCJ0+Zs 6XiO/E/wNk71zqsjyezqLN79twQ7lI0DgVtkap24sYjqWisWun+6XXZtO w==; X-IronPort-AV: E=McAfee;i="6600,9927,10727"; a="335853475" X-IronPort-AV: E=Sophos;i="6.00,209,1681196400"; d="scan'208";a="335853475" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 02:09:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10727"; a="797069712" X-IronPort-AV: E=Sophos;i="6.00,209,1681196400"; d="scan'208";a="797069712" Received: from tejas-super-server.iind.intel.com ([10.145.169.166]) by FMSMGA003.fm.intel.com with ESMTP; 01 Jun 2023 02:09:43 -0700 From: Tejas Upadhyay To: intel-gfx@lists.freedesktop.org Date: Thu, 1 Jun 2023 14:45:18 +0530 Message-Id: <20230601091518.1698066-1-tejas.upadhyay@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH V4] drm/i915/gt: Add workaround 14016712196 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" For mtl, workaround suggests that, SW insert a dummy PIPE_CONTROL prior to PIPE_CONTROL which contains a post sync: Timestamp or Write Immediate. Bspec: 72197 V4: - Update commit message, avoid returing cs - Andi/Matt V3: - Wrap dummy pipe control stuff in API - Andi V2: - Fix kernel test robot warnings Closes: https://lore.kernel.org/oe-kbuild-all/202305121525.3EWdGoBY-lkp@intel.com/ Signed-off-by: Tejas Upadhyay Reviewed-by: Andi Shyti --- drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 40 ++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c index e1c76e5bfa82..9e3d4323f36f 100644 --- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c @@ -177,14 +177,42 @@ u32 *gen12_emit_aux_table_inv(struct intel_gt *gt, u32 *cs, const i915_reg_t inv return cs; } +static int mtl_dummy_pipe_control(struct i915_request *rq) +{ + /* Wa_14016712196 */ + if (IS_MTL_GRAPHICS_STEP(rq->engine->i915, M, STEP_A0, STEP_B0) || + IS_MTL_GRAPHICS_STEP(rq->engine->i915, P, STEP_A0, STEP_B0)) { + int ret = 0; + u32 *cs; + + /* dummy PIPE_CONTROL + depth flush */ + cs = intel_ring_begin(rq, 6); + ret = IS_ERR(cs); + if (ret) + return PTR_ERR(cs); + cs = gen12_emit_pipe_control(cs, + 0, + PIPE_CONTROL_DEPTH_CACHE_FLUSH, + LRC_PPHWSP_SCRATCH_ADDR); + intel_ring_advance(rq, cs); + } + + return 0; +} + int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode) { struct intel_engine_cs *engine = rq->engine; if (mode & EMIT_FLUSH) { u32 flags = 0; + int err; u32 *cs; + err = mtl_dummy_pipe_control(rq); + if (err) + return err; + flags |= PIPE_CONTROL_TILE_CACHE_FLUSH; flags |= PIPE_CONTROL_FLUSH_L3; flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; @@ -217,6 +245,11 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode) if (mode & EMIT_INVALIDATE) { u32 flags = 0; u32 *cs, count; + int err; + + err = mtl_dummy_pipe_control(rq); + if (err) + return err; flags |= PIPE_CONTROL_COMMAND_CACHE_INVALIDATE; flags |= PIPE_CONTROL_TLB_INVALIDATE; @@ -733,6 +766,13 @@ u32 *gen12_emit_fini_breadcrumb_rcs(struct i915_request *rq, u32 *cs) PIPE_CONTROL_DC_FLUSH_ENABLE | PIPE_CONTROL_FLUSH_ENABLE); + /* Wa_14016712196 */ + if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_A0, STEP_B0) || + IS_MTL_GRAPHICS_STEP(i915, P, STEP_A0, STEP_B0)) + /* dummy PIPE_CONTROL + depth flush */ + cs = gen12_emit_pipe_control(cs, 0, + PIPE_CONTROL_DEPTH_CACHE_FLUSH, 0); + if (GRAPHICS_VER(i915) == 12 && GRAPHICS_VER_FULL(i915) < IP_VER(12, 50)) /* Wa_1409600907 */ flags |= PIPE_CONTROL_DEPTH_STALL;