linux-kernel - Re: [PATCH V4 0/8] PCI: ACPI: Setting up DMA coherency for PCI device from

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 24 Oct 2015 15:51:03 +0800
From:	Hanjun Guo <guohanjun@...wei.com>
To:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	<bhelgaas@...gle.com>, <rjw@...ysocki.net>, <lenb@...nel.org>,
	<catalin.marinas@....com>, <will.deacon@....com>
CC:	<hanjun.guo@...aro.org>, <thomas.lendacky@....com>,
	<herbert@...dor.apana.org.au>, <davem@...emloft.net>,
	<linux-acpi@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH V4 0/8] PCI: ACPI: Setting up DMA coherency for PCI device
 from _CCA attribute

On 2015/10/21 23:52, Suravee Suthikulpanit wrote:
> This patch series adds support to setup DMA coherency for PCI device using
> the ACPI _CCA attribute. According to the ACPI spec, the _CCA attribute
> is required for ARM64. Therefore, this patch is a pre-req for ACPI PCI
> support for ARM64 which is currently in development.  Also, this should
> not affect other architectures that does not define 
> CONFIG_ACPI_CCA_REQUIRED, since the default value is coherent.
>
> In the process, this series also introduces enum dev_dma_attr and a set
> of APIs to query device DMA attribute. These APIs replace the obsolete
> device_dma_is_coherent(), and acpi_check_dma().
>
> I have also included a patch from Jeremy posted here:
>     http://www.spinics.net/lists/linux-usb/msg128582.html
>
> This patch series  has been tested on AMD Seattle RevB platform.
> The git tree containing tested code and pre-req patches are posted here:
>
>     http://github.com/ssuthiku/linux.git pci-cca-v4
>
> Changes from V3: (https://lkml.org/lkml/2015/8/26/389)
>     * Clean up suggested by Bjorn
>     * Introduce enum dev_dma_attr
>     * Replace device_dma_is_coherent() and acpi_check_dma() with
>       new APIs.
>
> Changes from V2: (https://lkml.org/lkml/2015/8/25/549)
>     * Return -ENOSUPP instead of -1 (per Rafael's suggestion)
>     * Add WARN() when fail to setup DMA for PCI device when booting
>       ACPI (per Arnd's suggestion)
>     * Added Acked-by from Rob.
>     * Minor clean up
>
> Changes from V1: (https://lkml.org/lkml/2015/8/13/182)
>     * Include patch 1 from Jeremy to enable support for _CCA=0
>     * Clean up acpi_check_dma() per Bjorn suggestions
>     * Split the original V1 patch into two patches (patch 3 and 4)
>
> Jeremy Linton (1):
>   Honor ACPI _CCA attribute setting
>
> Suravee Suthikulpanit (7):
>   device property: Introducing enum dev_dma_attr
>   acpi: Adding DMA Attribute APIs for ACPI Device
>   device property: Adding DMA Attribute APIs for Generic Devices
>   device property: acpi: Make use of the new DMA Attribute APIs
>   device property: acpi: Remove unused DMA APIs
>   PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()
>   PCI: ACPI: Add support for PCI device DMA coherency

If the minor comments for patch 7,8 are addressed,

Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>

Thanks
Hanjun


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/