Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing PCI host bridge resources.

From	Jon Masters <jcm@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing PCI host bridge resources.
Date	2016-04-27 07:40 +0200
Message-ID	<rsqmD-42B-23@gated-at.bofh.it> (permalink)
References	<rofpL-6tr-1@gated-at.bofh.it> <rofzt-6y6-51@gated-at.bofh.it> <rsnyp-1OM-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 04/26/2016 10:39 PM, Bjorn Helgaas wrote:
> On Fri, Apr 15, 2016 at 07:06:40PM +0200, Tomasz Nowicki wrote:
>> Platforms that have memory mapped IO port (such as ARM64) need special
>> handling for PCI I/O resources. For host bridge's resource probing case
>> these resources need to be fixed up with pci_register_io_range/pci_remap_iospace etc.
> 
> ia64 also has memory-mapped I/O port space.

The specific references of interest to anyone here are:

*). Volume 2, Part 1: Itanium® Architecture-based Operating System
Interaction Model with IA-32 Applications 2:267 section "10.7 I/O Port
Space Model" which describes how they can map 4 "legacy" IO ports on a
virtual page when operating in a "sparse" mode.

*). Page 378 of the ACPI6.1 specification Table 6-213 I/O Resource Flag
(Resource Type = 1) Definitions describes how a "sparse" translation can
exist depending upon bit _TRS. This seems to be implemented in Linux
using the ACPI_SPARSE_TRANSLATION types.

> It would be ideal to find
> some way to handle ia64 and ARM64 similarly.  At the very least, we
> have to make sure that this doesn't break ia64.  The ia64 dense/sparse
> I/O spaces complicate things; I don't know if ARM64 has something
> similar or not.

There's nothing directly similar - it's just regular MMIO.

Jon.

-- 
Computer Architect | Sent from my Fedora powered laptop

Thread

[PATCH V6 00/13] Support for generic ACPI based PCI host controller Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
  [PATCH V6 11/13] pci, acpi: Match PCI config space accessors against platfrom specific quirks. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
    Re: [PATCH V6 11/13] pci, acpi: Match PCI config space accessors  against platfrom specific quirks. "liudongdong (C)" <liudongdong3@huawei.com> - 2016-04-18 14:00 +0200
      Re: [PATCH V6 11/13] pci, acpi: Match PCI config space accessors  against platfrom specific quirks. Tomasz Nowicki <tn@semihalf.com> - 2016-04-18 14:30 +0200
  [PATCH V6 13/13] pci, pci-thunder-pem: Add ACPI support for ThunderX PEM. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
  [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus domain number. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
    Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 04:30 +0200
      Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-04-27 13:20 +0200
        Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 18:50 +0200
          Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-04-27 19:40 +0200
            Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Liviu.Dudau@arm.com - 2016-04-28 10:20 +0200
      Re: [PATCH V6 02/13] pci, acpi: Provide generic way to assign bus  domain number. Tomasz Nowicki <tn@semihalf.com> - 2016-04-27 14:10 +0200
  [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI support for ThunderX ECAM. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
    Re: [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI support for  ThunderX ECAM. Tomasz Nowicki <tn@semihalf.com> - 2016-04-19 12:30 +0200
      Re: [Linaro-acpi] [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI  support for ThunderX ECAM. G Gregory <graeme.gregory@linaro.org> - 2016-04-19 12:50 +0200
        Re: [Linaro-acpi] [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI  support for ThunderX ECAM. Graeme Gregory <gg@slimlogic.co.uk> - 2016-04-19 13:20 +0200
          Re: [Linaro-acpi] [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI  support for ThunderX ECAM. Tomasz Nowicki <tn@semihalf.com> - 2016-04-19 13:30 +0200
            Re: [Linaro-acpi] [PATCH V6 12/13] pci, pci-thunder-ecam: Add ACPI  support for ThunderX ECAM. G Gregory <graeme.gregory@linaro.org> - 2016-04-19 14:30 +0200
  [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
    Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-15 20:50 +0200
      Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Jayachandran C <jchandra@broadcom.com> - 2016-04-16 09:30 +0200
        Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-16 09:40 +0200
          Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Jayachandran C <jchandra@broadcom.com> - 2016-04-16 16:40 +0200
            Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Tomasz Nowicki <tn@semihalf.com> - 2016-04-18 15:10 +0200
              Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-18 16:50 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Tomasz Nowicki <tn@semihalf.com> - 2016-04-18 21:40 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-19 15:10 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Tomasz Nowicki <tn@semihalf.com> - 2016-04-21 11:30 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-21 11:40 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Tomasz Nowicki <tn@semihalf.com> - 2016-04-21 12:10 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Jon Masters <jcm@redhat.com> - 2016-04-22 16:40 +0200
                Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API David Daney <ddaney.cavm@gmail.com> - 2016-04-22 18:10 +0200
    Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic ECAM API Arnd Bergmann <arnd@arndb.de> - 2016-04-19 23:50 +0200
      Re: [PATCH V6 08/13] PCI: generic, thunder: update to use generic  ECAM API Jayachandran C <jchandra@broadcom.com> - 2016-04-20 02:30 +0200
  [PATCH V6 04/13] pci, of: Move the PCI I/O space management to PCI core code. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
  [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI host controller Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
    Re: [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI  host controller Jayachandran C <jchandra@broadcom.com> - 2016-04-20 21:20 +0200
      Re: [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI  host controller Tomasz Nowicki <tn@semihalf.com> - 2016-04-21 11:10 +0200
        Re: [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI  host controller Jayachandran C <jchandra@broadcom.com> - 2016-04-22 15:00 +0200
        Re: [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI  host controller Jon Masters <jcm@redhat.com> - 2016-04-22 16:50 +0200
          Re: [PATCH V6 09/13] pci, acpi: Support for ACPI based generic PCI  host controller Jon Masters <jcm@redhat.com> - 2016-04-23 17:30 +0200
  [PATCH V6 10/13] arm64, pci, acpi: Start using ACPI based PCI host controller driver for ARM64. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:10 +0200
  [PATCH V6 06/13] arm64, pci, acpi: ACPI support for legacy IRQs parsing and consolidation with DT code. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:20 +0200
    Re: [PATCH V6 06/13] arm64, pci, acpi: ACPI support for legacy IRQs  parsing and consolidation with DT code. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 04:50 +0200
      Re: [PATCH V6 06/13] arm64, pci, acpi: ACPI support for legacy IRQs  parsing and consolidation with DT code. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-04-27 13:50 +0200
  [PATCH V6 07/13] PCI: Provide common functions for ECAM mapping Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:20 +0200
    Re: [PATCH V6 07/13] PCI: Provide common functions for ECAM mapping Arnd Bergmann <arnd@arndb.de> - 2016-04-15 20:50 +0200
  [PATCH V6 01/13] pci, acpi, x86, ia64: Move ACPI host bridge device companion assignment to core code. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:20 +0200
    Re: [PATCH V6 01/13] pci, acpi, x86, ia64: Move ACPI host bridge  device companion assignment to core code. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 00:40 +0200
      Re: [PATCH V6 01/13] pci, acpi, x86, ia64: Move ACPI host bridge  device companion assignment to core code. Tomasz Nowicki <tn@semihalf.com> - 2016-04-27 12:20 +0200
    Re: [PATCH V6 01/13] pci, acpi, x86, ia64: Move ACPI host bridge  device companion assignment to core code. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 04:50 +0200
  [PATCH V6 03/13] x86, ia64: Include acpi_pci_{add|remove}_bus to the default pcibios_{add|remove}_bus implementation. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:20 +0200
    Re: [PATCH V6 03/13] x86, ia64: Include acpi_pci_{add|remove}_bus to  the default pcibios_{add|remove}_bus implementation. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 04:40 +0200
      Re: [PATCH V6 03/13] x86, ia64: Include acpi_pci_{add|remove}_bus to  the default pcibios_{add|remove}_bus implementation. Tomasz Nowicki <tn@semihalf.com> - 2016-04-27 15:30 +0200
  [PATCH V6 05/13] acpi, pci: Support IO resources when parsing PCI host bridge resources. Tomasz Nowicki <tn@semihalf.com> - 2016-04-15 19:20 +0200
    Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing  PCI host bridge resources. Bjorn Helgaas <helgaas@kernel.org> - 2016-04-27 04:40 +0200
      Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing PCI  host bridge resources. Jon Masters <jcm@redhat.com> - 2016-04-27 07:40 +0200
      Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing  PCI host bridge resources. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-04-27 16:30 +0200
        Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing  PCI host bridge resources. Liviu.Dudau@arm.com - 2016-04-27 17:20 +0200
          Re: [PATCH V6 05/13] acpi, pci: Support IO resources when parsing  PCI host bridge resources. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-04-27 18:10 +0200
  Re: [PATCH V6 00/13] Support for generic ACPI based PCI host  controller Jon Masters <jcm@redhat.com> - 2016-04-15 20:20 +0200
    Re: [PATCH V6 00/13] Support for generic ACPI based PCI host controller Jayachandran C <jchandra@broadcom.com> - 2016-04-16 17:40 +0200
      Re: [PATCH V6 00/13] Support for generic ACPI based PCI host  controller Tomasz Nowicki <tn@semihalf.com> - 2016-04-18 15:40 +0200
        Re: [PATCH V6 00/13] Support for generic ACPI based PCI host controller Arnd Bergmann <arnd@arndb.de> - 2016-04-18 16:40 +0200
          Re: [PATCH V6 00/13] Support for generic ACPI based PCI host  controller Tomasz Nowicki <tn@semihalf.com> - 2016-04-18 17:30 +0200
    Re: [PATCH V6 00/13] Support for generic ACPI based PCI host controller Martinez Kristofer <kristofer.s.martinez@gmail.com> - 2016-04-17 11:30 +0200
  Re: [PATCH V6 00/13] Support for generic ACPI based PCI host controller Duc Dang <dhdang@apm.com> - 2016-04-16 20:40 +0200
  Re: [PATCH V6 00/13] Support for generic ACPI based PCI host  controller Sinan Kaya <okaya@codeaurora.org> - 2016-04-17 06:20 +0200
  Re: [PATCH V6 00/13] Support for generic ACPI based PCI host  controller Jeremy Linton <jeremy.linton@arm.com> - 2016-04-25 19:30 +0200

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