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Message-ID: <557F9BDF.9090201@amd.com> Date: Mon, 15 Jun 2015 22:45:35 -0500 From: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com> To: "Rafael J. Wysocki" <rjw@...ysocki.net> CC: <lenb@...nel.org>, <catalin.marinas@....com>, <will.deacon@....com>, <thomas.lendacky@....com>, <herbert@...dor.apana.org.au>, <davem@...emloft.net>, <arnd@...db.de>, <kashyap.desai@...gotech.com>, <sumit.saxena@...gotech.com>, <uday.lingala@...gotech.com>, <vinholikatti@...il.com>, <msalter@...hat.com>, <hanjun.guo@...aro.org>, <al.stone@...aro.org>, <grant.likely@...aro.org>, <leo.duran@....com>, <linux-arm-kernel@...ts.infradead.org>, <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linaro-acpi@...ts.linaro.org>, <netdev@...r.kernel.org>, <linux-crypto@...r.kernel.org> Subject: Re: [V6 PATCH 0/7] ACPI: Introduce support for _CCA object Thank you. Suravee On 6/15/15 18:24, Rafael J. Wysocki wrote: > On Wednesday, June 10, 2015 11:08:51 AM Suravee Suthikulpanit wrote: >> This patch series introduce support for _CCA object, which is currently >> used mainly by ARM64 platform to specify DMA coherency attribute for >> devices when booting with ACPI. >> >> A copy of ACPIv6 can be found here: >> http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf >> >> This patch also introduces a new APIS: >> 1. acpi_check_dma() as part of ACPI API. >> 2. device_dma_is_coherent() as part of unified device property API. >> >> This simplifies the logic in device drivers to determine device coherency >> attribute regardless of booting with DT vs ACPI. >> >> This has been tested on AMD-Seattle platform, which implements _CCA >> object as described in the AMD Opteron A1100 Series Processor ACPI Porting Guide: >> >> http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2012/10/Seattle_ACPI_Guide.pdf >> >> Changes from V5 (https://lkml.org/lkml/2015/5/20/1033): >> * Fix build error in the megaraid and ufs driver >> (reported by Mark Salter) >> >> Changes from V4 (https://lkml.org/lkml/2015/5/15/669): >> * Patch1: >> - Move the arch_setup_dma_ops() call from acpi_create_platform_device() >> to acpi_bind_one() to support other bus types (per Rafael). >> - Rename acpi_device_flags.is_coherent to acpi_device_flags.coherent_dma. >> (per Rafael) >> - Refactor acpi_dma_is_supported() and acpi_dma_is_coherent() to >> acpi_check_dma() to simplify the new interface. >> - Only support _CCA=1 for now. See acpi_check_dma() (per Arnd and Catalin) >> * Patch2: >> - Add acked-by Catalin. >> * Patch3: >> - Use ACPI_COMPANION() instead of acpi_node(). >> - Remove has_acpi_companion() check since already done by acpi_node(). >> (per Will) >> * Remove the patch "Generic function for setting up PCI device DMA coherency" >> introduced in V4. (per Bjorn) >> >> Changes from V3 (https://lkml.org/lkml/2015/5/7/1004): >> * Remove ARCH64_SUPPORT_ACPI_CCA_ZERO and just use CONFIG_ARM64. >> (per Catalin and Rafael) >> * Do not need to call arch_setup_dma_ops() for acpi_device->dev. >> (per Rafael) >> * [3/6] (New) We also need to call arch_setup_dma_ops() for pci >> devices and check the CCA of the host bridge. Similar logic >> exists for OF. So, I refactor of_pci_dma_configure() to >> the more generic version pci_dma_configure(), and add support >> for ACPI. >> >> Changes from V2 (https://lkml.org/lkml/2015/5/5/510): >> * Reword ACPI_MUST_HAVE_CCA to ACPI_CCA_REQUIRED (per Rafael) >> * Reword ACPI_SUPPORT_CCA_ZERO to ARCH64_SUPPORT_ACPI_CCA_ZERO >> (per Rafael and Arnd) >> * Misc code styling clean up (per Rafael) >> * Only print missing _CCA warning message in debug mode. >> * Refactor logic in acpi_setup_device_dma() into >> if acpi_dma_is_supported() then call arch_setup_dma_ops(). >> * Do not allocate device dma_mask if !acpi_dma_is_supported() >> (per Arnd). >> * Re-use the dummy functions with the same signature. >> >> Changes from V1 (https://lkml.org/lkml/2015/4/29/290): >> * Remove supports for 32-bit ARM since doesn't currently >> supporting ACPI (Per Catalin suggestions.) >> * Do not call arch_setup_dma_ops() and when _CCA is missing. >> (per Arnd suggestion) >> * Add CONFIG_ACPI_SUPPORT_CCA_ZERO kernel config flag to >> allow architectures to specify the behavior when _CCA=0. >> * Add dummy_dma_ops for ARM64 (per Catalin suggestions). >> * Fixed build error when ACPI is not configured by defining >> acpi_dma_is_coherent() for when CONFIG_ACPI is not set. >> * Introduce device_dma_is_coherent(). >> * Use device_dma_is_coherent in crypto/ccp and amd-xgbe driver. >> >> Changes from RFC: (https://lkml.org/lkml/2015/4/1/389) >> * New logic for deriving and propagating coherent attribute from >> parent devices. (by Mark) >> * Introducing acpi_dma_is_coherent() API (Per Tom suggestion) >> * Introducing CONFIG_ACPI_MUST_HAVE_CCA kernel configuration. >> * Rebased to linux-4.1-rc1 >> >> Suravee Suthikulpanit (7): >> ACPI / scan: Parse _CCA and setup device coherency >> arm64 : Introduce support for ACPI _CCA object >> device property: Introduces device_dma_is_coherent() >> crypto: ccp - Unify coherency checking logic with >> device_dma_is_coherent() >> amd-xgbe: Unify coherency checking logic with device_dma_is_coherent() >> megaraid_sas: fix TRUE and FALSE re-define build error >> ufs: fix TRUE and FALSE re-define build error >> >> arch/arm64/Kconfig | 1 + >> arch/arm64/include/asm/dma-mapping.h | 18 +++++- >> arch/arm64/mm/dma-mapping.c | 92 +++++++++++++++++++++++++++++++ >> drivers/acpi/Kconfig | 3 + >> drivers/acpi/acpi_platform.c | 2 +- >> drivers/acpi/glue.c | 5 ++ >> drivers/acpi/scan.c | 35 ++++++++++++ >> drivers/base/property.c | 14 +++++ >> drivers/crypto/ccp/ccp-platform.c | 60 +------------------- >> drivers/net/ethernet/amd/xgbe/xgbe-main.c | 27 +-------- >> drivers/scsi/megaraid/megaraid_sas_fp.c | 8 +++ >> drivers/scsi/ufs/unipro.h | 8 +++ >> include/acpi/acpi_bus.h | 37 ++++++++++++- >> include/linux/acpi.h | 5 ++ >> include/linux/property.h | 2 + >> 15 files changed, 228 insertions(+), 89 deletions(-) > > I've queued up the series for 4.2, thanks! > > -- 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/
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