From patchwork Mon May 15 10:12:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 682562 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A058AC7EE2E for ; Mon, 15 May 2023 10:16:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241091AbjEOKQU (ORCPT ); Mon, 15 May 2023 06:16:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240832AbjEOKQM (ORCPT ); Mon, 15 May 2023 06:16:12 -0400 X-Greylist: delayed 179 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 15 May 2023 03:15:35 PDT Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [85.215.255.80]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E02BC2106; Mon, 15 May 2023 03:15:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1684145544; cv=none; d=strato.com; s=strato-dkim-0002; b=qDTIIAzqDyNFmO0GjIMWdlTAsPfxoi9c54XrSPnPIBCD+/Ac0NqjPIo6RX6ZXYFA/v XfSRhLCFFqaZY+hM+ieOq8rjSYgktwQ/tfFSeaZAmb+l7MHOBSN4ag8OibJxs/nNzGuJ yqHI9U60zAdGQoDotldrbSoLHJ3sxR3Qfu9o4COGYCqhsQq6l6N9z7Kw7UQS2+hRBwIR ftSNtfx19eFQlt3El2cFRuG67B9/TXphBjO+Sjj2KW4jf6hH/KJ9cnxjcR4SGfqgcLPZ RArsEHlfPp6fstmF4Zj5Agy2rxlSMF7RV1jvuhngOzoXFykStQDrUs8J8MweXQjExpqD ybsw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1684145544; s=strato-dkim-0002; d=strato.com; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=olVuiJZGfA/LHV3YVLMLjpbt55lnzWTZbOuO9FJhuMI=; b=V6mauyZYvxwo5w3sMUAKskAbdeyyXVMqzWDRWwTuyaCbU9/14gd3OZUCy4fSob6NBl +pP2fjAi05cVDIRS9WVjjmdDh4HOuGTqMstUiaOGL+XIs9QGySlmIgEiCO4M1q/1iGSu MWPKD5uWoPvJ8KS524PAe+iZXzdMYRXYiM20K4LDW40/PHJ2AMGETzRzF5TxMXQxXVGa u3uIVWYGvYN4z1wyYRYEN69RSAS6OQjxcWqlhYXj9so/o/hJH0q/I11WFB7yU5AJ5Ta0 q9xTCt4ceGjb82ozounPElMKglNLribywWcnBbr5wYmG7TgOygKjw0qkUhK+O4y4CM4Z xfyg== ARC-Authentication-Results: i=1; strato.com; arc=none; dkim=none X-RZG-CLASS-ID: mo02 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1684145544; s=strato-dkim-0002; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=olVuiJZGfA/LHV3YVLMLjpbt55lnzWTZbOuO9FJhuMI=; b=CY+o6P9VjlLTzgmoC0ukNBftxBPWTp+7p5Sf63HXc0kUdrbe51QDEhkdp9Wtei8gCx 36mkGqS1MxlBxUd2aUZm8VSzzNvMDQ+iEyrYqhhDomIXlgCGy0lYIQlTuJVh/7vTZXjH LZk02fO22jf3tEZDtUtM/hEzd/CoSxwcSfng63j1v3SMB17uUs5bzuub7PAMNgvhSk5h fVs9gKoT23x5tolvWfYrBeCcMwEdRGVXI+f17rwhgYErxVvZpiA+WYm8KF5vlZFlNfSK JKBYgV4xLhWiG84cXENjPysczqq8CwbFkGjrxDqLv8EBWXhxPuxZ28E+Od8VshjfWQ3m NQpA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1684145544; s=strato-dkim-0003; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=olVuiJZGfA/LHV3YVLMLjpbt55lnzWTZbOuO9FJhuMI=; b=NpzOsiBC7Df5KrzmYokWRVug7C5LvTnshPFSpfjZg+SXou+lgjK2J8KTa7xrsVuGtr lptCIGHXxBH9BsowsSBg== X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVOQjVd4CteZ/7jYgS+mLFY+H0JAn8u4ly9TY=" Received: from [192.168.244.3] by smtp.strato.de (RZmta 49.4.0 DYNA|AUTH) with ESMTPSA id j6420az4FACO1JG (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Mon, 15 May 2023 12:12:24 +0200 (CEST) From: Stephan Gerhold Date: Mon, 15 May 2023 12:12:16 +0200 Subject: [PATCH 1/5] dt-bindings: reserved-memory: Add alloc-{bottom-up,top-down} MIME-Version: 1.0 Message-Id: <20230510-dt-resv-bottom-up-v1-1-3bf68873dbed@gerhold.net> References: <20230510-dt-resv-bottom-up-v1-0-3bf68873dbed@gerhold.net> In-Reply-To: <20230510-dt-resv-bottom-up-v1-0-3bf68873dbed@gerhold.net> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Rowand Cc: Andy Gross , Bjorn Andersson , Konrad Dybcio , devicetree@vger.kernel.org, devicetree-spec@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Stephan Gerhold X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Right now the allocation behavior for dynamic reserved memory is implementation-defined. On Linux it is dependent on the architecture. This is usually fine if the address is completely arbitrary. However, when using "alloc-ranges" it is helpful to allow controlling this. That way you can make sure that the reservations are placed next to other (static) allocations to keep the free memory contiguous if possible. Signed-off-by: Stephan Gerhold --- .../bindings/reserved-memory/reserved-memory.yaml | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml index c680e397cfd2..56f4bc6137e7 100644 --- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml +++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml @@ -52,6 +52,18 @@ properties: Address and Length pairs. Specifies regions of memory that are acceptable to allocate from. + alloc-bottom-up: + type: boolean + description: > + Specifies that the memory region should be preferably allocated + at the lowest available address within the "alloc-ranges" region. + + alloc-top-down: + type: boolean + description: > + Specifies that the memory region should be preferably allocated + at the highest available address within the "alloc-ranges" region. + iommu-addresses: $ref: /schemas/types.yaml#/definitions/phandle-array description: > @@ -93,6 +105,10 @@ properties: system can use that region to store volatile or cached data that can be otherwise regenerated or migrated elsewhere. +dependencies: + alloc-bottom-up: [alloc-ranges] + alloc-top-down: [alloc-ranges] + allOf: - if: required: @@ -178,4 +194,27 @@ examples: }; }; }; + + - | + / { + compatible = "foo"; + model = "foo"; + + #address-cells = <2>; + #size-cells = <2>; + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + adsp_mem: adsp { + size = <0x0 0x600000>; + alignment = <0x0 0x100000>; + alloc-ranges = <0x0 0x86800000 0x0 0x10000000>; + alloc-bottom-up; + no-map; + }; + }; + }; ...