From patchwork Fri May 15 21:23:10 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suravee Suthikulpanit X-Patchwork-Id: 6416601 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5AE4DC0432 for ; Fri, 15 May 2015 21:27:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4A1032056E for ; Fri, 15 May 2015 21:27:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CAA452058E for ; Fri, 15 May 2015 21:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946374AbbEOV12 (ORCPT ); Fri, 15 May 2015 17:27:28 -0400 Received: from mail-bn1on0112.outbound.protection.outlook.com ([157.56.110.112]:46578 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1945963AbbEOVXx (ORCPT ); Fri, 15 May 2015 17:23:53 -0400 Received: from CY1PR0201CA0006.namprd02.prod.outlook.com (25.163.30.144) by BN3PR02MB1109.namprd02.prod.outlook.com (25.162.168.14) with Microsoft SMTP Server (TLS) id 15.1.166.22; Fri, 15 May 2015 21:23:50 +0000 Received: from BN1AFFO11FD028.protection.gbl (2a01:111:f400:7c10::149) by CY1PR0201CA0006.outlook.office365.com (2a01:111:e400:58b9::16) with Microsoft SMTP Server (TLS) id 15.1.166.22 via Frontend Transport; Fri, 15 May 2015 21:23:50 +0000 Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=amd.com; arm.com; dkim=none (message not signed) header.d=none; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) Received: from atltwp02.amd.com (165.204.84.222) by BN1AFFO11FD028.mail.protection.outlook.com (10.58.52.88) with Microsoft SMTP Server id 15.1.160.8 via Frontend Transport; Fri, 15 May 2015 21:23:49 +0000 X-WSS-ID: 0NOEU3L-08-55A-02 X-M-MSG: Received: from satlvexedge01.amd.com (satlvexedge01.amd.com [10.177.96.28]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by atltwp02.amd.com (Axway MailGate 5.3.1) with ESMTPS id 23200D22012; Fri, 15 May 2015 17:23:45 -0400 (EDT) Received: from SATLEXDAG04.amd.com (10.181.40.9) by satlvexedge01.amd.com (10.177.96.28) with Microsoft SMTP Server (TLS) id 14.3.195.1; Fri, 15 May 2015 16:23:53 -0500 Received: from ssuthiku-fedora-lt.amd.com (10.180.168.240) by satlexdag04.amd.com (10.181.40.9) with Microsoft SMTP Server id 14.3.195.1; Fri, 15 May 2015 17:23:46 -0400 From: Suravee Suthikulpanit To: , , , , , , , , CC: , , , , , , , , , , , "Suravee Suthikulpanit" Subject: [V4 PATCH 2/6] arm64 : Introduce support for ACPI _CCA object Date: Fri, 15 May 2015 16:23:10 -0500 Message-ID: <1431724994-21601-3-git-send-email-Suravee.Suthikulpanit@amd.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1431724994-21601-1-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1431724994-21601-1-git-send-email-Suravee.Suthikulpanit@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Microsoft-Exchange-Diagnostics: 1; BN1AFFO11FD028; 1:6sjWMCNTCn0gXveTD8cv3gVN0t+z82sOykZogJCpUkEOeAyZW5UHDWAM1jR1wRgJX3ruSN/UbIiE+0bNaAE6YtZDYRJEEA2U7TiKlHusPRw+nm7LsrI34bLHQaD7P84IVV0SmShNFHAMpmYIsDhKSr7yfGmWGONEJgv1ZZ6CfsqUCneLtHoFD110bd6E3ObjvDURnxnvc0frJp2FAPAjGvOa+tvEY95MihgqrW4YBRHAiO/NXI+PYTWhrlwdHq0LHrxeg9D4IEL2iKKVJHjkZAxJZTD1jv2XQFsve/P+PBVyC1aaBcGG9VpXr9oyfJ3T X-Forefront-Antispam-Report: CIP:165.204.84.222; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(428002)(189002)(199003)(2201001)(86362001)(575784001)(106466001)(53416004)(50466002)(87936001)(46102003)(229853001)(48376002)(101416001)(189998001)(19580405001)(77096005)(5001770100001)(47776003)(2950100001)(15975445007)(19580395003)(50226001)(36756003)(105586002)(92566002)(77156002)(62966003)(76176999)(50986999); DIR:OUT; SFP:1102; SCL:1; SRVR:BN3PR02MB1109; H:atltwp02.amd.com; FPR:; SPF:None; MLV:sfv; MX:1; A:1; LANG:en; X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BN3PR02MB1109; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(601004)(5005006)(3002001); SRVR:BN3PR02MB1109; BCL:0; PCL:0; RULEID:; SRVR:BN3PR02MB1109; X-Forefront-PRVS: 0577AD41D6 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2015 21:23:49.4489 (UTC) X-MS-Exchange-CrossTenant-Id: fde4dada-be84-483f-92cc-e026cbee8e96 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fde4dada-be84-483f-92cc-e026cbee8e96; Ip=[165.204.84.222]; Helo=[atltwp02.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR02MB1109 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf, section 6.2.17 _CCA states that ARM platforms require ACPI _CCA object to be specified for DMA-cabpable devices. This patch introduces ACPI_MUST_HAVE_CCA in arm64 Kconfig to specify such requirement. In case _CCA is missing, arm64 would assign dummy_dma_ops to disable DMA capability of the device. Signed-off-by: Mark Salter Signed-off-by: Suravee Suthikulpanit CC: Catalin Marinas CC: Will Deacon CC: Arnd Bergmann Acked-by: Catalin Marinas --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/dma-mapping.h | 18 ++++++- arch/arm64/mm/dma-mapping.c | 92 ++++++++++++++++++++++++++++++++++++ 3 files changed, 109 insertions(+), 2 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4269dba..95307b4 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1,5 +1,6 @@ config ARM64 def_bool y + select ACPI_CCA_REQUIRED if ACPI select ACPI_GENERIC_GSI if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 9437e3d..f0d6d0b 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -18,6 +18,7 @@ #ifdef __KERNEL__ +#include #include #include @@ -28,13 +29,23 @@ #define DMA_ERROR_CODE (~(dma_addr_t)0) extern struct dma_map_ops *dma_ops; +extern struct dma_map_ops dummy_dma_ops; static inline struct dma_map_ops *__generic_dma_ops(struct device *dev) { - if (unlikely(!dev) || !dev->archdata.dma_ops) + if (unlikely(!dev)) return dma_ops; - else + else if (dev->archdata.dma_ops) return dev->archdata.dma_ops; + else if (acpi_disabled) + return dma_ops; + + /* + * When ACPI is enabled, if arch_set_dma_ops is not called, + * we will disable device DMA capability by setting it + * to dummy_dma_ops. + */ + return &dummy_dma_ops; } static inline struct dma_map_ops *get_dma_ops(struct device *dev) @@ -48,6 +59,9 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev) static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, struct iommu_ops *iommu, bool coherent) { + if (!acpi_disabled && !dev->archdata.dma_ops) + dev->archdata.dma_ops = dma_ops; + dev->archdata.dma_coherent = coherent; } #define arch_setup_dma_ops arch_setup_dma_ops diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index ef7d112..6e6d6ad 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -415,6 +415,98 @@ out: return -ENOMEM; } +/******************************************** + * The following APIs are for dummy DMA ops * + ********************************************/ + +static void *__dummy_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flags, + struct dma_attrs *attrs) +{ + return NULL; +} + +static void __dummy_free(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs) +{ +} + +static int __dummy_mmap(struct device *dev, + struct vm_area_struct *vma, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + struct dma_attrs *attrs) +{ + return -ENXIO; +} + +static dma_addr_t __dummy_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + return DMA_ERROR_CODE; +} + +static void __dummy_unmap_page(struct device *dev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ +} + +static int __dummy_map_sg(struct device *dev, struct scatterlist *sgl, + int nelems, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + return 0; +} + +static void __dummy_unmap_sg(struct device *dev, + struct scatterlist *sgl, int nelems, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ +} + +static void __dummy_sync_single(struct device *dev, + dma_addr_t dev_addr, size_t size, + enum dma_data_direction dir) +{ +} + +static void __dummy_sync_sg(struct device *dev, + struct scatterlist *sgl, int nelems, + enum dma_data_direction dir) +{ +} + +static int __dummy_mapping_error(struct device *hwdev, dma_addr_t dma_addr) +{ + return 1; +} + +static int __dummy_dma_supported(struct device *hwdev, u64 mask) +{ + return 0; +} + +struct dma_map_ops dummy_dma_ops = { + .alloc = __dummy_alloc, + .free = __dummy_free, + .mmap = __dummy_mmap, + .map_page = __dummy_map_page, + .unmap_page = __dummy_unmap_page, + .map_sg = __dummy_map_sg, + .unmap_sg = __dummy_unmap_sg, + .sync_single_for_cpu = __dummy_sync_single, + .sync_single_for_device = __dummy_sync_single, + .sync_sg_for_cpu = __dummy_sync_sg, + .sync_sg_for_device = __dummy_sync_sg, + .mapping_error = __dummy_mapping_error, + .dma_supported = __dummy_dma_supported, +}; +EXPORT_SYMBOL(dummy_dma_ops); + static int __init arm64_dma_init(void) { int ret;