From patchwork Mon May 16 10:02:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 12850522 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 DA31DC433FE for ; Mon, 16 May 2022 10:02:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 022BA10E790; Mon, 16 May 2022 10:02:40 +0000 (UTC) Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by gabe.freedesktop.org (Postfix) with ESMTPS id 823C110E798 for ; Mon, 16 May 2022 10:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=pGQX1JKxanPmqedEue8d2htEoS8AyrUnifwuz1TiUYY=; b=stj2aNYDMNKtVVFXkAJyNwiVwE 5jmjneZb5CXQlIaAfydH3UNASfeBHXJcLNzbvqYwsBt2IrRd9XfI+1teMYw5QlVX5eqDFFjnFJeXO QTdBoeSqgSkHaJzS3Pz2gQPsDt7oGbRlvvMOFUF8dP8ZqOD0ul8dfjg2JmQu91KrDV9VHotNsjAbI QTJYH9rOwmmOZ5V3l0OXeu4AluaJosZCBME2vLXAKa+bmjW4pVVpIR7H/6gt/dVZel1Svrb0Xk39P rup9+leHFKAvzB912bBW6/1wYRtxqRgmgHyyz6pB+gj+cDkEuAbntk1l8rP3GMvxuyRaBRQWh1dEW xZSey3CQ==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nqXYg-0005yU-O8; Mon, 16 May 2022 13:02:34 +0300 From: cyndis@kapsi.fi To: thierry.reding@gmail.com, jonathanh@nvidia.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, digetx@gmail.com Subject: [PATCH v1 12/13] gpu: host1x: Use RESTART_W to skip timed out jobs on Tegra186+ Date: Mon, 16 May 2022 13:02:12 +0300 Message-Id: <20220516100213.1536571-13-cyndis@kapsi.fi> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516100213.1536571-1-cyndis@kapsi.fi> References: <20220516100213.1536571-1-cyndis@kapsi.fi> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false 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: linux-tegra@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Mikko Perttunen Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Mikko Perttunen When MLOCK enforcement is enabled, the 0-word write currently done is rejected by the hardware outside of an MLOCK region. As such, on these chips, which also have the newer, more convenient RESTART_W opcode, use that instead to skip over the timed out job. Signed-off-by: Mikko Perttunen --- drivers/gpu/host1x/cdma.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c index 765e5aa64eb6..bb1f3c746be4 100644 --- a/drivers/gpu/host1x/cdma.c +++ b/drivers/gpu/host1x/cdma.c @@ -457,9 +457,24 @@ void host1x_cdma_update_sync_queue(struct host1x_cdma *cdma, * to offset 0xbad. This does nothing but * has a easily detected signature in debug * traces. + * + * On systems with MLOCK enforcement enabled, + * the above 0 word writes would fall foul of + * the enforcement. As such, in the first slot + * put a RESTART_W opcode to the beginning + * of the next job. We don't use this for older + * chips since those only support the RESTART + * opcode with inconvenient alignment requirements. */ - mapped[2*slot+0] = 0x1bad0000; - mapped[2*slot+1] = 0x1bad0000; + if (i == 0 && host1x->info->has_wide_gather) { + unsigned int next_job = (job->first_get/8 + job->num_slots) + % HOST1X_PUSHBUFFER_SLOTS; + mapped[2*slot+0] = (0xd << 28) | (next_job * 2); + mapped[2*slot+1] = 0x0; + } else { + mapped[2*slot+0] = 0x1bad0000; + mapped[2*slot+1] = 0x1bad0000; + } } job->cancelled = true;