From patchwork Fri May 1 07:39:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11522239 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 137341392 for ; Fri, 1 May 2020 07:40:07 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DBD7B2173E for ; Fri, 1 May 2020 07:40:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="gMfRkU6y" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DBD7B2173E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5977F6EBA6; Fri, 1 May 2020 07:40:05 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pj1-x1041.google.com (mail-pj1-x1041.google.com [IPv6:2607:f8b0:4864:20::1041]) by gabe.freedesktop.org (Postfix) with ESMTPS id E73E36EBA6 for ; Fri, 1 May 2020 07:40:03 +0000 (UTC) Received: by mail-pj1-x1041.google.com with SMTP id e6so2071098pjt.4 for ; Fri, 01 May 2020 00:40:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=NSH9BerjJoV88xjF7QVK1SklBZqxZKa42SGy8GT/SY0=; b=gMfRkU6y7H6ig9SB1voFB4Yprbz40Y65m2Mu8m2ApDv+jlMCQ2E6B9PMumov1+nGbF 45e9GP/a2A50GpZUNhd4HGTouy7LlSl5VzwQlUCMs1AXhJXwuMJcLarUGrUkRjxNS0+s CyzTAHjlmacCveMfha1bTwwkBCOPfUE7uuSPucD0Z+vxu1J/f4pWD34fBtGcMp6CN5j0 WMzgYCWeYRnk5hwW12qNNwjCMvrO4G4QzAW5V1SgWMWdDrFL1f6Szn68URsUfcJpdrLj vJQtM0xsiQq2qKPoVohGRHexTuBl0Itj2tNgGnXC3UD9PZdIeoJ518WZvDOK9dLvUKuk HzRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=NSH9BerjJoV88xjF7QVK1SklBZqxZKa42SGy8GT/SY0=; b=WixncW8p6RUH7nP7X88/Wn1KLWVPuBkUmfbkKAudoKY9GLoYzSWQkMKD2WkG8gdPMf 4Tjrx47hn1RpEleaaw9ukPeIPmM05LxvV9M4pLqKuJWKWvKIPfKodVl7QGKkUV3oVob5 L+sDp3B0KSmBIU3nvKfVvNjC2nIG9UA3w2Oij4fe/arEgtSCW9r64TcWt2AdVE84hY7T IAbbmDmRID1VWJnsPxZOXJ36PqgoGOhhlmBZJYn+z3v06gQfPK3/X3hBXo0yGdy+s4e9 kwoySGFcdy/3SV2/Omm3uCrpmRuW94MJIjRTBa+AVRuL3OuM2PcjauVpeFxncrN4GNZ/ YKew== X-Gm-Message-State: AGi0Pua8Ry0NUzFbYXtZ1ePu5S6DfpZvRq6G36G/BxaWVhFS8BlkXJKo aWPiJJ6YO0rrY3DI8avM8sYW8Q== X-Google-Smtp-Source: APiQypJx7E4+GSzc/77OGnxoI4XuIbUstaIsftZ+TRzVjzHs+hgtNb6KovPmKD4Pj3wjrWGJONPmuw== X-Received: by 2002:a17:90a:734b:: with SMTP id j11mr3082377pjs.108.1588318803469; Fri, 01 May 2020 00:40:03 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id w12sm1557841pfq.133.2020.05.01.00.39.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2020 00:40:03 -0700 (PDT) From: John Stultz To: lkml Subject: [RFC][PATCH 1/4] devicetree: bindings: Add linux, cma-heap tag for reserved memory Date: Fri, 1 May 2020 07:39:46 +0000 Message-Id: <20200501073949.120396-2-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200501073949.120396-1-john.stultz@linaro.org> References: <20200501073949.120396-1-john.stultz@linaro.org> 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: devicetree@vger.kernel.org, Sandeep Patil , Christoph Hellwig , Robin Murphy , Chenbo Feng , Alistair Strachan , Liam Mark , "Andrew F. Davis" , linux-mm@kvack.org, Rob Herring , dri-devel@lists.freedesktop.org, Hridya Valsaraju , Andrew Morton , Laura Abbott , Pratik Patel , Marek Szyprowski MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch adds a linux,cma-heap property for CMA reserved memory regions, which will be used to allow the region to be exposed via the DMA-BUF Heaps interface Cc: Rob Herring Cc: Sumit Semwal Cc: "Andrew F. Davis" Cc: Benjamin Gaignard Cc: Liam Mark Cc: Pratik Patel Cc: Laura Abbott Cc: Brian Starkey Cc: Chenbo Feng Cc: Alistair Strachan Cc: Sandeep Patil Cc: Hridya Valsaraju Cc: Christoph Hellwig Cc: Marek Szyprowski Cc: Robin Murphy Cc: Andrew Morton Cc: devicetree@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-mm@kvack.org Signed-off-by: John Stultz --- .../devicetree/bindings/reserved-memory/reserved-memory.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt index bac4afa3b197..e97b6a4c3bc0 100644 --- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt +++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt @@ -68,6 +68,9 @@ Linux implementation note: - If a "linux,cma-default" property is present, then Linux will use the region for the default pool of the contiguous memory allocator. +- If a "linux,cma-heap" property is present, then Linux will expose the + the CMA region via the DMA-BUF Heaps interface. + - If a "linux,dma-default" property is present, then Linux will use the region for the default pool of the consistent DMA allocator.