From patchwork Fri Apr 12 16:53:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Kuoppala X-Patchwork-Id: 10898825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ABFB81708 for ; Fri, 12 Apr 2019 16:53:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8CD1728EB4 for ; Fri, 12 Apr 2019 16:53:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8139028E98; Fri, 12 Apr 2019 16:53:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 25D19289E9 for ; Fri, 12 Apr 2019 16:53:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B46D2899F0; Fri, 12 Apr 2019 16:53:45 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id F388E899F0 for ; Fri, 12 Apr 2019 16:53:43 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Apr 2019 09:53:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,342,1549958400"; d="scan'208";a="161242389" Received: from rosetta.fi.intel.com ([10.237.72.186]) by fmsmga004.fm.intel.com with ESMTP; 12 Apr 2019 09:53:42 -0700 Received: by rosetta.fi.intel.com (Postfix, from userid 1000) id 17CEE8404EA; Fri, 12 Apr 2019 19:53:36 +0300 (EEST) From: Mika Kuoppala To: intel-gfx@lists.freedesktop.org Date: Fri, 12 Apr 2019 19:53:35 +0300 Message-Id: <20190412165335.16347-1-mika.kuoppala@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <155508607114.28089.9460215312684391386@skylake-alporthouse-com> References: <155508607114.28089.9460215312684391386@skylake-alporthouse-com> Subject: [Intel-gfx] [PATCH 1/2] drm/i915: Shortcut readiness to reset check X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 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-Virus-Scanned: ClamAV using ClamSMTP If the engine says it is ready for reset, it is ready so avoid further dancing and proceed. v2: reg (Chris) v3: request, ack, mask from following patch (Chris) Cc: Chris Wilson Signed-off-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_reset.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reset.c b/drivers/gpu/drm/i915/i915_reset.c index 68875ba43b8d..ab628a8f6c1f 100644 --- a/drivers/gpu/drm/i915/i915_reset.c +++ b/drivers/gpu/drm/i915/i915_reset.c @@ -490,18 +490,23 @@ static int gen11_reset_engines(struct drm_i915_private *i915, static int gen8_engine_reset_prepare(struct intel_engine_cs *engine) { struct intel_uncore *uncore = engine->uncore; + const i915_reg_t reg = RING_RESET_CTL(engine->mmio_base); + u32 ctl, request, mask, ack; int ret; - intel_uncore_write_fw(uncore, - RING_RESET_CTL(engine->mmio_base), - _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET)); + ctl = intel_uncore_read_fw(uncore, reg); + if (!(ctl & RESET_CTL_READY_TO_RESET)) { + request = RESET_CTL_REQUEST_RESET; + mask = RESET_CTL_READY_TO_RESET; + ack = RESET_CTL_READY_TO_RESET; + } else { + return 0; + } - ret = __intel_wait_for_register_fw(uncore, - RING_RESET_CTL(engine->mmio_base), - RESET_CTL_READY_TO_RESET, - RESET_CTL_READY_TO_RESET, - 700, 0, - NULL); + intel_uncore_write_fw(uncore, reg, _MASKED_BIT_ENABLE(request)); + + ret = __intel_wait_for_register_fw(uncore, reg, mask, ack, + 700, 0, NULL); if (ret) DRM_ERROR("%s: reset request timeout\n", engine->name);