From patchwork Thu May 25 11:37:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gabriele Paoloni X-Patchwork-Id: 100501 Delivered-To: patch@linaro.org Received: by 10.140.96.100 with SMTP id j91csp719715qge; Thu, 25 May 2017 04:40:44 -0700 (PDT) X-Received: by 10.99.44.6 with SMTP id s6mr43184811pgs.25.1495712444535; Thu, 25 May 2017 04:40:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1495712444; cv=none; d=google.com; s=arc-20160816; b=O7l/i44YnDdsriGN9d925YwSVbmiBKNCDRz57h7VfSHGadJ051aSdHz1R7iQiYFf54 R/R2QZkkxuhyIt2kVjje6rmeSIhWTqkCb6ZpqtQqIyNrPJ/4el4/JCE3SusVd4AGVy3e QbHmU95Kt+r2tmDY8GlIyrjMyMycAX95i6sni+JYp0JvWnf2eOqKulDvBFdHIYRbST8R IqlVcdstYTI5DxiQc9ygCTD5ploWpT1iUyvqN5muqdFv5h3/LRkA6EJr+3UXIPalDDAy hPzMIFk811wwbxnmBVsj/Jy64KJZqrFD9ZbrOiSCPico6QON7b9dwyJt2Sd9AK2peiAj xa0w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:subject:cc :to:from:arc-authentication-results; bh=iWPX+zF+jGjsy7BaCefzpEA9DCYEuDMLZp3tSfSy0Y4=; b=nM3/TQfQjbpVFVmPGILGwjvg0QVszkYRziWFrEBvgGin2CLSqvGK1Gl88Ql89pgZ/i 2/ecCe0ZMY4cwYC8XoGsIj7/C8gt8UZh8e0GAEBxCV9wcVmpukvCATT6Cw7UsJWReE6D BCaXnICxSNdkQz3ls5E8vH7omAW00LDuYMe2sFOzumwWSqi3ql8zlawEoNHX+M/AskA1 EOFL/UV4/HBNdVLEP9/Lk95CQg12mMcIp7J7u5hOX6rV5Qia5b+DKaNb5zUzl55hLEa8 NJzcoz0jBmq04RQ3qDJ2TyGqM8JOn184CGwbV8AjMvhH8Tq/YisDG1XXtElF9/4ykHUf 4OGw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id x14si17563290pfk.335.2017.05.25.04.40.44; Thu, 25 May 2017 04:40:44 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765255AbdEYLi5 (ORCPT + 25 others); Thu, 25 May 2017 07:38:57 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:6909 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935895AbdEYLiu (ORCPT ); Thu, 25 May 2017 07:38:50 -0400 Received: from 172.30.72.54 (EHLO DGGEML401-HUB.china.huawei.com) ([172.30.72.54]) by dggrg03-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id AOG95708; Thu, 25 May 2017 19:38:32 +0800 (CST) Received: from G00308965-DELL1.china.huawei.com (10.203.181.156) by DGGEML401-HUB.china.huawei.com (10.3.17.32) with Microsoft SMTP Server id 14.3.301.0; Thu, 25 May 2017 19:38:23 +0800 From: Gabriele Paoloni To: , , , , , , , , CC: , , , , , , , , , , , Subject: [PATCH v9 0/7] LPC: legacy ISA I/O support Date: Thu, 25 May 2017 12:37:21 +0100 Message-ID: <1495712248-5232-1-git-send-email-gabriele.paoloni@huawei.com> X-Mailer: git-send-email 2.7.1.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.203.181.156] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020201.5926C23D.00D1, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: f0d324365c3525c6192d820c76e7211f Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: gabriele paoloni This patchset supports the IPMI-bt device attached to the Low-Pin-Count interface implemented on Hisilicon Hip06/Hip07 SoC. ----------- | LPC host| | | ----------- | _____________V_______________LPC | | V V ------------ | BT(ipmi)| ------------ When master accesses those peripherals beneath the Hip06/Hip07 LPC, a specific LPC driver is needed to make LPC host generate the standard LPC I/O cycles with the target peripherals'I/O port addresses. But on curent arm64 world, there is no real I/O accesses. All the I/O operations through in/out accessors are based on MMIO ranges; on Hip06/Hip07 LPC the I/O accesses are performed through driver specific accessors rather than MMIO. To solve this issue and keep the relevant existing peripherals' drivers untouched, this patchset: - introduces a generic I/O space management framework, LIBIO, to support I/O operations on host controllers operating either on MMIO buses or on buses requiring specific driver I/O accessors; - redefines the in/out accessors to provide a unified interface for both MMIO and driver specific I/O operations. Using LIBIO, th call of in/out() from the host children drivers, such as ipmi-si, will be redirected to the corresponding device-specific I/O hooks to perform the I/O accesses. Based on this patch-set, all the I/O accesses to Hip06/Hip07 LPC peripherals can be supported without any changes on the existing ipmi-si driver. The whole patchset has been tested on Hip07 D05 board both using DTB and ACPI. Changes from v8: - Simplified LIB IO framewrok - Moved INDIRECT PIO ACPI framework under acpi/arm64 - Renamed occurrences of "lib io" and "indirect io" to "lib pio" and "indirect pio" to keep the patchset nomenclature consistent - Removed Alignment reuqirements - Moved LPC specific code out of ACPI common framework - Now PIO indirect HW ranges can overlap - Changed HiSilicon LPC driver maintainer (Gabriele Paoloni now) and split maintaner file modifications in a separate commit - Removed the commit with the DT nodes support for hip06 and hip07 (to be pushed separately) - Added a checking on ioport_map() not to break that function as Arnd points out in V7 review thread; - fixed the compile issues on alpha, m68k; Changes from V7: - Based on Arnd's comment, rename the LIBIO as LOGIC_PIO; - Improved the mapping process in LOGIC_PIO to gain better efficiency when redirecting the I/O accesses to right device driver; - To reduce the impact on PCI MMIO to a minimum, add a new CONFIG_INDIRECT_PIO for indirect-IO hosts/devices; - Added a new ACPI handler for indirect-IO hosts/devices; - Fixed the compile issues on V6; Changes from V6: - According to the comments from Bjorn and Alex, merge PCI IO and indirect-IO into a generic I/O space management, LIBIO; - Adopted the '_DEP' to replace the platform bus notifier. In this way, we can ensure the LPC peripherals' I/O resources had been translated to logical IO before the LPC peripheral enumeration; - Replaced the rwlock with rcu list based on Alex's suggestion; - Applied relaxed write/read to LPC driver; - Some bugs fixing and some optimazations based on the comments of V6; Changes from V5: - Made the extio driver more generic and locate in lib/; - Supported multiple indirect-IO bus instances; - Extended the pci_register_io_range() to support indirect-IO, then dropped the I/O reservation used in previous patchset; - Reimplemented the ACPI LPC support; - Fixed some bugs, including the compile error on other archs, the module building failure found by Ming Lei, etc; Changes from V4: - Some revises based on the comments from Bjorn, Rob on V4; - Fixed the compile error on some platforms, such as openrisc; Changes from V3: - UART support deferred to a separate patchset; This patchset only support ipmi device under LPC; - LPC bus I/O range is fixed to 0 ~ (PCIBIOS_MIN_IO - 1), which is separeted from PCI/PCIE PIO space; - Based on Arnd's remarks, removed the ranges property from Hip06 lpc dts and added a new fixup function, of_isa_indirect_io(), to get the I/O address directly from LPC dts configurations; - Support in(w,l)/out(w,l) for Hip06 lpc I/O; - Decouple the header file dependency on the gerenic io.h by defining in/out as normal functions in c file; - removed unused macro definitions in the LPC driver; Changes from V2: - Support the PIO retrieval from the linux PIO generated by pci_address_to_pio. This method replace the 4K PIO reservation in V2; - Support the flat-tree earlycon; - Some revises based on Arnd's remarks; - Make sure the linux PIO range allocated to Hip06 LPC peripherals starts from non-ZERO; Changes from V1: - Support the ACPI LPC device; - Optimize the dts LPC driver in ISA compatible mode; - Reserve the IO range below 4K in avoid the possible conflict with PCI host IO ranges; - Support the LPC uart and relevant earlycon; V8 thread here: https://lkml.org/lkml/2017/3/30/619 V7 thread here: https://lkml.org/lkml/2017/3/12/279 v6 thread here: https://lkml.org/lkml/2017/1/24/25 v5 thread here: https://lkml.org/lkml/2016/11/7/955 v4 thread here: https://lkml.org/lkml/2016/10/20/149 v3 thread here: https://lkml.org/lkml/2016/9/14/326 v2 thread here: https://lkml.org/lkml/2016/9/7/356 v1 thread here: https://lkml.org/lkml/2015/12/29/154 Gabriele (1): ACPI: Translate the I/O range of non-MMIO devices before scanning Gabriele Paoloni (1): MANTAINERS: Add maintainer for HiSilicon LPC driver zhichang.yuan (5): LIB: Introduce a generic PIO mapping method PCI: Apply the new generic I/O management on PCI IO hosts OF: Add missing I/O range exception for indirect-IO devices LPC: Support the device-tree LPC host on Hip06/Hip07 LPC: Add the ACPI LPC support .../arm/hisilicon/hisilicon-low-pin-count.txt | 33 ++ MAINTAINERS | 8 + drivers/acpi/arm64/Makefile | 1 + drivers/acpi/arm64/acpi_indirect_pio.c | 304 ++++++++++ drivers/acpi/internal.h | 5 + drivers/acpi/pci_root.c | 8 +- drivers/acpi/scan.c | 1 + drivers/bus/Kconfig | 9 + drivers/bus/Makefile | 1 + drivers/bus/hisi_lpc.c | 609 +++++++++++++++++++++ drivers/of/address.c | 95 +++- drivers/pci/pci.c | 101 +--- include/acpi/acpi_indirect_pio.h | 28 + include/asm-generic/io.h | 52 +- include/linux/logic_pio.h | 110 ++++ include/linux/pci.h | 3 +- lib/Kconfig | 26 + lib/Makefile | 2 + lib/logic_pio.c | 280 ++++++++++ 19 files changed, 1573 insertions(+), 103 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt create mode 100644 drivers/acpi/arm64/acpi_indirect_pio.c create mode 100644 drivers/bus/hisi_lpc.c create mode 100644 include/acpi/acpi_indirect_pio.h create mode 100644 include/linux/logic_pio.h create mode 100644 lib/logic_pio.c -- 2.7.4