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From: Arnd Bergmann <arnd@kernel.org>
To: Rob Herring <robh@kernel.org>
Cc: Hector Martin <marcan@marcan.st>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Marc Zyngier <maz@kernel.org>, Olof Johansson <olof@lixom.net>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Mark Kettenis <mark.kettenis@xs4all.nl>,
	Tony Lindgren <tony@atomide.com>,
	Mohamed Mediouni <mohamed.mediouni@caramail.com>,
	Stan Skowronek <stan@corellium.com>,
	Alexander Graf <graf@amazon.com>, Will Deacon <will@kernel.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Christoph Hellwig <hch@infradead.org>,
	"David S. Miller" <davem@davemloft.net>,
	DTML <devicetree@vger.kernel.org>,
	"open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@vger.kernel.org>,
	"open list:GENERIC INCLUDE/ASM HEADER FILES" 
	<linux-arch@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFT PATCH v3 12/27] of/address: Add infrastructure to declare MMIO as non-posted
Date: Mon, 8 Mar 2021 22:56:14 +0100	[thread overview]
Message-ID: <CAK8P3a2GfzUevuQNZeQarJ4GNFsuDj0g7oFuN940Hdaw06YJbA@mail.gmail.com> (raw)
In-Reply-To: <20210308211306.GA2920998@robh.at.kernel.org>

On Mon, Mar 8, 2021 at 10:14 PM Rob Herring <robh@kernel.org> wrote:
> On Mon, Mar 08, 2021 at 09:29:54PM +0100, Arnd Bergmann wrote:
> > On Mon, Mar 8, 2021 at 4:56 PM Rob Herring <robh@kernel.org> wrote:
>
> Let's just stick with 'nonposted-mmio', but drop 'posted-mmio'. I'd
> rather know if and when we need 'posted-mmio'. It does need to be added
> to the DT spec[1] and schema[2] though (GH PRs are fine for both).

I think the reason for having "posted-mmio" is that you cannot properly
define the PCI host controller nodes on the M1 without that: Since
nonposted-mmio applies to all child nodes, this would mean the PCI
memory space gets declared as nonposted by the DT, but the hardware
requires it to be mapped as posted.

       Arnd

  reply	other threads:[~2021-03-08 21:57 UTC|newest]

Thread overview: 136+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-04 21:38 [RFT PATCH v3 00/27] Apple M1 SoC platform bring-up Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 01/27] arm64: Cope with CPUs stuck in VHE mode Hector Martin
2021-03-24 18:05   ` Will Deacon
2021-03-24 20:00     ` Marc Zyngier
2021-03-26  7:54       ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 02/27] dt-bindings: vendor-prefixes: Add apple prefix Hector Martin
2021-03-08 20:26   ` Rob Herring
2021-03-04 21:38 ` [RFT PATCH v3 03/27] dt-bindings: arm: apple: Add bindings for Apple ARM platforms Hector Martin
2021-03-05 10:16   ` Linus Walleij
2021-03-08 20:27   ` Rob Herring
2021-03-04 21:38 ` [RFT PATCH v3 04/27] dt-bindings: arm: cpus: Add apple,firestorm & icestorm compatibles Hector Martin
2021-03-08 20:27   ` Rob Herring
2021-03-04 21:38 ` [RFT PATCH v3 05/27] arm64: cputype: Add CPU implementor & types for the Apple M1 cores Hector Martin
2021-03-24 18:13   ` Will Deacon
2021-03-04 21:38 ` [RFT PATCH v3 06/27] dt-bindings: timer: arm,arch_timer: Add interrupt-names support Hector Martin
2021-03-05 10:18   ` Linus Walleij
2021-03-08 11:12   ` Marc Zyngier
2021-03-08 17:14   ` Tony Lindgren
2021-03-08 20:38   ` Rob Herring
2021-03-08 22:42     ` Marc Zyngier
2021-03-09 16:11       ` Rob Herring
2021-03-09 20:28         ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 07/27] arm64: arch_timer: implement support for interrupt-names Hector Martin
2021-03-05 10:19   ` Linus Walleij
2021-03-08 11:13   ` Marc Zyngier
2021-03-04 21:38 ` [RFT PATCH v3 08/27] asm-generic/io.h: Add a non-posted variant of ioremap() Hector Martin
2021-03-05 14:45   ` Andy Shevchenko
2021-03-05 15:19     ` Hector Martin
2021-03-08 11:20   ` Marc Zyngier
2021-03-24 18:12   ` Will Deacon
2021-03-24 19:09     ` Arnd Bergmann
2021-03-25 14:07       ` Hector Martin
2021-03-25 14:49         ` Will Deacon
2021-03-04 21:38 ` [RFT PATCH v3 09/27] docs: driver-api: device-io: Document I/O access functions Hector Martin
2021-03-05 10:22   ` Linus Walleij
2021-03-04 21:38 ` [RFT PATCH v3 10/27] docs: driver-api: device-io: Document ioremap() variants & access funcs Hector Martin
2021-03-05 10:25   ` Linus Walleij
2021-03-05 15:09     ` Andy Shevchenko
2021-03-05 15:51       ` Arnd Bergmann
2021-03-09 20:29         ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 11/27] arm64: Implement ioremap_np() to map MMIO as nGnRnE Hector Martin
2021-03-08 11:22   ` Marc Zyngier
2021-03-24 18:18   ` Will Deacon
2021-03-04 21:38 ` [RFT PATCH v3 12/27] of/address: Add infrastructure to declare MMIO as non-posted Hector Martin
2021-03-05 10:28   ` Linus Walleij
2021-03-05 15:13   ` Andy Shevchenko
2021-03-05 15:55     ` Hector Martin
2021-03-05 16:08       ` Andy Shevchenko
2021-03-05 16:43         ` Arnd Bergmann
2021-03-05 17:19           ` Hector Martin
2021-03-05 16:05     ` Rob Herring
2021-03-05 17:39   ` Rob Herring
2021-03-05 18:18     ` Hector Martin
2021-03-05 21:17       ` Arnd Bergmann
2021-03-08 15:56         ` Rob Herring
2021-03-08 20:29           ` Arnd Bergmann
2021-03-08 21:13             ` Rob Herring
2021-03-08 21:56               ` Arnd Bergmann [this message]
2021-03-09 15:48                 ` Rob Herring
2021-03-09 20:23                   ` Hector Martin
2021-03-09 22:06                     ` Rob Herring
2021-03-10  8:26                       ` Hector Martin
2021-03-10 17:01                         ` Rob Herring
2021-03-11  9:12                           ` Arnd Bergmann
2021-03-11 12:11                             ` Hector Martin
2021-03-11 13:35                               ` Arnd Bergmann
2021-03-11 16:07                             ` Rob Herring
2021-03-11 16:48                               ` Arnd Bergmann
2021-03-11 18:10                                 ` Rob Herring
2021-03-12 10:20                                   ` Arnd Bergmann
2021-03-09 11:14               ` Linus Walleij
2021-03-09 12:41                 ` Arnd Bergmann
2021-03-09 15:40                   ` Linus Walleij
2021-03-04 21:38 ` [RFT PATCH v3 13/27] arm64: Add Apple vendor-specific system registers Hector Martin
2021-03-24 18:38   ` Will Deacon
2021-03-24 18:59     ` Mark Rutland
2021-03-24 19:04       ` Will Deacon
2021-03-26  6:23         ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 14/27] arm64: move ICH_ sysreg bits from arm-gic-v3.h to sysreg.h Hector Martin
2021-03-08 11:39   ` Marc Zyngier
2021-03-24 18:23   ` Will Deacon
2021-03-04 21:38 ` [RFT PATCH v3 15/27] dt-bindings: interrupt-controller: Add DT bindings for apple-aic Hector Martin
2021-03-08 21:16   ` Rob Herring
2021-03-04 21:38 ` [RFT PATCH v3 16/27] irqchip/apple-aic: Add support for the Apple Interrupt Controller Hector Martin
2021-03-05 15:05   ` Andy Shevchenko
2021-03-08 11:50     ` Marc Zyngier
2021-03-08 12:02       ` Andy Shevchenko
2021-03-26 13:40     ` Hector Martin
2021-03-08 13:31   ` Marc Zyngier
2021-03-26  7:57     ` Hector Martin
2021-03-24 19:57   ` Will Deacon
2021-03-26  8:58     ` Hector Martin
2021-03-29 12:04       ` Will Deacon
2021-04-01 13:16         ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 17/27] arm64: Kconfig: Introduce CONFIG_ARCH_APPLE Hector Martin
2021-03-08 15:35   ` Marc Zyngier
2021-03-09 20:30     ` Hector Martin
2021-03-04 21:38 ` [RFT PATCH v3 18/27] tty: serial: samsung_tty: Separate S3C64XX ops structure Hector Martin
2021-03-05 10:30   ` Krzysztof Kozlowski
2021-03-04 21:38 ` [RFT PATCH v3 19/27] tty: serial: samsung_tty: Add ucon_mask parameter Hector Martin
2021-03-05 10:34   ` Krzysztof Kozlowski
2021-03-04 21:38 ` [RFT PATCH v3 20/27] tty: serial: samsung_tty: Add s3c24xx_port_type Hector Martin
2021-03-05 10:49   ` Krzysztof Kozlowski
2021-03-04 21:38 ` [RFT PATCH v3 21/27] tty: serial: samsung_tty: IRQ rework Hector Martin
2021-03-05 10:51   ` Krzysztof Kozlowski
2021-03-05 15:17   ` Andy Shevchenko
2021-03-05 16:16     ` Hector Martin
2021-03-05 16:20       ` Andy Shevchenko
2021-03-05 16:29         ` Hector Martin
2021-03-07 11:34           ` Krzysztof Kozlowski
2021-03-07 16:01             ` Arnd Bergmann
2021-03-07 19:51               ` Krzysztof Kozlowski
2021-03-04 21:38 ` [RFT PATCH v3 22/27] tty: serial: samsung_tty: Use devm_ioremap_resource Hector Martin
2021-03-05 10:54   ` Krzysztof Kozlowski
2021-03-05 15:19     ` Andy Shevchenko
2021-03-04 21:38 ` [RFT PATCH v3 23/27] dt-bindings: serial: samsung: Add apple,s5l-uart compatible Hector Martin
2021-03-08 21:17   ` Rob Herring
2021-03-04 21:38 ` [RFT PATCH v3 24/27] tty: serial: samsung_tty: Add support for Apple UARTs Hector Martin
2021-03-05 10:58   ` Krzysztof Kozlowski
2021-03-05 15:28   ` Andy Shevchenko
2021-03-05 17:04     ` Hector Martin
2021-03-07 11:40       ` Krzysztof Kozlowski
2021-03-04 21:39 ` [RFT PATCH v3 25/27] tty: serial: samsung_tty: Add earlycon " Hector Martin
2021-03-05 10:55   ` Krzysztof Kozlowski
2021-03-10 23:11   ` Linus Walleij
2021-03-04 21:39 ` [RFT PATCH v3 26/27] dt-bindings: display: Add apple,simple-framebuffer Hector Martin
2021-03-08 21:18   ` Rob Herring
2021-03-09 16:37   ` Linus Walleij
2021-03-09 20:35     ` Hector Martin
2021-03-04 21:39 ` [RFT PATCH v3 27/27] arm64: apple: Add initial Apple Mac mini (M1, 2020) devicetree Hector Martin
2021-03-05 11:03   ` Krzysztof Kozlowski
2021-03-05 11:14     ` Hector Martin
2021-03-05 11:45       ` Krzysztof Kozlowski
2021-03-05 15:59       ` Mark Kettenis
2021-03-05 16:50         ` Hector Martin
2021-03-05 10:11 ` [RFT PATCH v3 00/27] Apple M1 SoC platform bring-up Hector Martin

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