From patchwork Tue Feb 20 14:20:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andi Shyti X-Patchwork-Id: 13564094 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 C3125C5475B for ; Tue, 20 Feb 2024 14:21:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CF2DA10E46A; Tue, 20 Feb 2024 14:21:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="SIuQOYDu"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2811710E486; Tue, 20 Feb 2024 14:21:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708438869; x=1739974869; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HPtiP7PZxZwC5GGDZKuHaMs0/IGLQ0pcFgPpdFKI2tg=; b=SIuQOYDuCLqPU82n0+It/SCumoiYKGEPSpNclL0TTgjfv8tFgsLtHt8s LvXSz5+PEhn6HhgGshKq12OFg2vTDcdftYDO4PQwJLvA1o82v9sYUa9oc zvOixnsQeGH8FLcPhQh4lmirqeiXHtJMRaD7KxsXAf3Oq+EY79C9KIyPk vseX9xbtIfkhU8l1CyfIKtK11pGwbrD/JkVSr4V+ankGkkmGM8MCWPiyg dzgAZ1Xb3QrDzydSEqbdJoWqs5PueILmtOg0vtbW8NUK4HLxnOAeQecSf vcEysNt8uh7g62r1w3Os/P7LyZrkEUO36lkWiwYqr0Ei5mcBJ9IR/0XBQ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10989"; a="2447036" X-IronPort-AV: E=Sophos;i="6.06,172,1705392000"; d="scan'208";a="2447036" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Feb 2024 06:21:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,172,1705392000"; d="scan'208";a="42283471" Received: from alichtma-mobl.ger.corp.intel.com (HELO intel.com) ([10.246.34.74]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Feb 2024 06:21:06 -0800 From: Andi Shyti To: intel-gfx , dri-devel Cc: Chris Wilson , Joonas Lahtinen , Matt Roper , John Harrison , Tvrtko Ursulin , stable@vger.kernel.org, Andi Shyti , Andi Shyti Subject: [PATCH 1/2] drm/i915/gt: Disable HW load balancing for CCS Date: Tue, 20 Feb 2024 15:20:33 +0100 Message-ID: <20240220142034.257370-2-andi.shyti@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240220142034.257370-1-andi.shyti@linux.intel.com> References: <20240220142034.257370-1-andi.shyti@linux.intel.com> MIME-Version: 1.0 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" The hardware should not dynamically balance the load between CCS engines. Wa_16016805146 recommends disabling it across all platforms. Fixes: d2eae8e98d59 ("drm/i915/dg2: Drop force_probe requirement") Signed-off-by: Andi Shyti Cc: Chris Wilson Cc: Joonas Lahtinen Cc: Matt Roper Cc: # v6.2+ --- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 1 + drivers/gpu/drm/i915/gt/intel_workarounds.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index 50962cfd1353..cf709f6c05ae 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -1478,6 +1478,7 @@ #define GEN12_RCU_MODE _MMIO(0x14800) #define GEN12_RCU_MODE_CCS_ENABLE REG_BIT(0) +#define XEHP_RCU_MODE_FIXED_SLICE_CCS_MODE REG_BIT(1) #define CHV_FUSE_GT _MMIO(VLV_GUNIT_BASE + 0x2168) #define CHV_FGT_DISABLE_SS0 (1 << 10) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index d67d44611c28..7f42c8015f71 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -2988,6 +2988,12 @@ general_render_compute_wa_init(struct intel_engine_cs *engine, struct i915_wa_li wa_mcr_masked_en(wal, GEN8_HALF_SLICE_CHICKEN1, GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE); } + + /* + * Wa_16016805146: disable the CCS load balancing + * indiscriminately for all the platforms + */ + wa_masked_en(wal, GEN12_RCU_MODE, XEHP_RCU_MODE_FIXED_SLICE_CCS_MODE); } static void