From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 373131A011A for ; Tue, 28 Oct 2014 20:24:37 +1100 (AEDT) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0115.outbound.protection.outlook.com [207.46.100.115]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id EDE1814007B for ; Tue, 28 Oct 2014 20:24:35 +1100 (AEDT) From: Emil Medve To: , , , , , , , , , , , , Subject: [PATCH v2 1/4] dt/bindings: Introduce the FSL QorIQ DPAA BMan Date: Tue, 28 Oct 2014 04:15:48 -0500 Message-ID: <1414487751-31568-2-git-send-email-Emilian.Medve@Freescale.com> In-Reply-To: <1414487751-31568-1-git-send-email-Emilian.Medve@Freescale.com> References: <1414487751-31568-1-git-send-email-Emilian.Medve@Freescale.com> MIME-Version: 1.0 Content-Type: text/plain Cc: Emil Medve List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The Buffer Manager is part of the Data-Path Acceleration Architecture (DPAA). BMan supports hardware allocation and deallocation of buffers belonging to pools originally created by software with configurable depletion thresholds. This binding covers the CCSR space programming model Signed-off-by: Emil Medve Change-Id: I3ec479bfb3c91951e96902f091f5d7d2adbef3b2 --- .../devicetree/bindings/powerpc/fsl/bman.txt | 95 ++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 Documentation/devicetree/bindings/powerpc/fsl/bman.txt diff --git a/Documentation/devicetree/bindings/powerpc/fsl/bman.txt b/Documentation/devicetree/bindings/powerpc/fsl/bman.txt new file mode 100644 index 0000000..d3fd1e3 --- /dev/null +++ b/Documentation/devicetree/bindings/powerpc/fsl/bman.txt @@ -0,0 +1,95 @@ +QorIQ DPAA Buffer Manager Device Tree Bindings + +Copyright (C) 2008 - 2014 Freescale Semiconductor Inc. + +CONTENTS + + - BMan Node + - BMan Private Memory Node + - Example + +BMan Node + +PROPERTIES + +- compatible + Usage: Required + Value type: + Definition: Must include "fsl,bman" + May include "fsl,-bman" + +- reg + Usage: Required + Value type: + Definition: Registers region within the CCSR address space + +- interrupts + Usage: Required + Value type: + Definition: Standard property. The error interrupt + +- fsl,liodn + Usage: See pamu.txt + Value type: + Definition: PAMU property used for static LIODN assignment + +- fsl,iommu-parent + Usage: See pamu.txt + Value type: + Definition: PAMU property used for dynamic LIODN assignment + + For additional details about the PAMU/LIODN binding(s) see pamu.txt + +BMan Private Memory Node + +BMan requires a contiguous range of physical memory used for the backing store +for BMan Free Buffer Proxy Records. This memory is reserved/allocated as a node +under the /reserved-memory node + +The BMan FBPR memory node must be named "bman-fbpr" + +PROPERTIES + +- compatible + Usage: required + Value type: + Definition: Must inclide "fsl,bman-fbpr" + +The following constraints are relevant to the FBPR private memory: + - The size must be 2^(size + 1), with size = 11..33. That is 4 KiB to + 16 GiB + - The alignment must be a muliptle of the memory size + +The size of the FBPR must be chosen by observing the hardware features configured +via the RCW and that are relevant to a specific board (e.g. number of MAC(s) +pinned-out, number of offline/host command FMan ports, etc.). The size configured +in the DT must reflect the hardware capabilities and not the specific needs of an +application + +For additional details about reserved memory regions see reserved-memory.txt + +EXAMPLE + +The example below shows a BMan FBPR dynamic allocation memory node + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + bman-fbpr { + compatible = "fsl,bman-fbpr"; + alloc-ranges = <0 0 0xf 0xffffffff>; + size = <0 0x1000000>; + alignment = <0 0x1000000>; + }; + }; + +The example below shows a (P4080) BMan CCSR-space node + + bman@31a000 { + compatible = "fsl,bman"; + reg = <0x31a000 0x1000>; + interrupts = <16 2 1 2>; + fsl,liodn = <0x17>; + }; -- 2.1.2