From mboxrd@z Thu Jan 1 00:00:00 1970 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 47BB4C25B74 for ; Sat, 25 May 2024 00:39:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ACDB910E068; Sat, 25 May 2024 00:39:36 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ENtoHvC5"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 894FD10E068 for ; Sat, 25 May 2024 00:39:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1716597574; x=1748133574; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=N913RugVcsAmbZJHpby8m+LOtdcJD0+gFNJQtOfCTgQ=; b=ENtoHvC5uyd6pRmdPGFKfqjguw2nZLZsLWFePwUvnilK2Y/aw320SpHS GB/XPk7AR6edLTmt3mtb4Ozq/03YqrgnHsUo42ClWY3jvrJzHAIOjk+Gz tqIPvrCOaWR96+JFRDUu4eJvu6/gcTdghuuc6GPLEi+lSuyvggGyAKNRS lbQTgkWgCZTBIQITdTtbKDKw/oGZG/nwckP8bxjmt5v+t/uDxDO5PDMUL L+Ld4gLMbWRq+qNn8QegZM0ooRqein/7h7Mrt2pA/jXdhLdUKv7o8W2T2 kUi4vxKMyOyv7F/UE4W6YGYg2ZfsFl9/p2axhq8AyDC8VtdzVUgRlgvmZ A==; X-CSE-ConnectionGUID: dZFtwXoESnmuqXBaUlgWWQ== X-CSE-MsgGUID: tOhfXQDmQr6BGXQpPF1Unw== X-IronPort-AV: E=McAfee;i="6600,9927,11082"; a="30507217" X-IronPort-AV: E=Sophos;i="6.08,187,1712646000"; d="scan'208";a="30507217" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2024 17:39:33 -0700 X-CSE-ConnectionGUID: 0ptdhgUaTreXh4XObu3AeA== X-CSE-MsgGUID: tRvDpA2FSPG6AQSH2QdCzA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,187,1712646000"; d="scan'208";a="39161968" Received: from pallavim-desk.iind.intel.com ([10.145.162.180]) by orviesa004.jf.intel.com with ESMTP; 24 May 2024 17:39:32 -0700 From: Pallavi Mishra To: intel-xe@lists.freedesktop.org Cc: matthew.d.roper@intel.com, Pallavi Mishra Subject: [PATCH] drm/xe/xe2: Enable Priority Mem Read Date: Sat, 25 May 2024 06:19:33 +0530 Message-Id: <20240525004933.1124012-1-pallavi.mishra@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Enable feature to allow memory reads to take a priority memory path. This will reduce latency on the read path, but may introduce RAW hazards. Bspec: 45845, 60237, 60187, 60188 Signed-off-by: Pallavi Mishra --- drivers/gpu/drm/xe/regs/xe_engine_regs.h | 1 + drivers/gpu/drm/xe/xe_hw_engine.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h index 263ffc7bc2ef..4e8f9a61f0bf 100644 --- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h @@ -104,6 +104,7 @@ #define CSFE_CHICKEN1(base) XE_REG((base) + 0xd4, XE_REG_OPTION_MASKED) #define GHWSP_CSB_REPORT_DIS REG_BIT(15) #define PPHWSP_CSB_AND_TIMESTAMP_REPORT_DIS REG_BIT(14) +#define CS_PRIORITY_MEM_READ REG_BIT(7) #define FF_SLICE_CS_CHICKEN1(base) XE_REG((base) + 0xe0, XE_REG_OPTION_MASKED) #define FFSC_PERCTX_PREEMPT_CTRL REG_BIT(14) diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c index de1aefaa2335..34aa8b5270b0 100644 --- a/drivers/gpu/drm/xe/xe_hw_engine.c +++ b/drivers/gpu/drm/xe/xe_hw_engine.c @@ -424,6 +424,13 @@ hw_engine_setup_default_state(struct xe_hw_engine *hwe) 0xA, XE_RTP_ACTION_FLAG(ENGINE_BASE))) }, + /* Enable Priority Mem Read */ + { XE_RTP_NAME("Priority_Mem_Read"), + XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2000, 2004)), + XE_RTP_ACTIONS(SET(CSFE_CHICKEN1(0), + CS_PRIORITY_MEM_READ)), + XE_RTP_ACTION_FLAG(ENGINE_BASE), + }, {} }; -- 2.25.1