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Wed, 26 Aug 2015 09:55:12 -0400 (EDT) Received: from SATLEXDAG01.amd.com (10.181.40.3) by SATLVEXEDGE02.amd.com (10.177.96.29) with Microsoft SMTP Server (TLS) id 14.3.195.1; Wed, 26 Aug 2015 08:55:23 -0500 Received: from ssuthiku-fedora-lt.amd.com (10.180.168.240) by SATLEXDAG01.amd.com (10.181.40.3) with Microsoft SMTP Server id 14.3.195.1; Wed, 26 Aug 2015 09:55:12 -0400 From: Suravee Suthikulpanit To: , , , , CC: , , , , , Suravee Suthikulpanit , Rob Herring , "Murali Karicheri" Subject: [PATCH V3 4/4] PCI: ACPI: Add support for PCI device DMA coherency Date: Wed, 26 Aug 2015 20:54:39 +0700 Message-ID: <1440597279-11802-5-git-send-email-Suravee.Suthikulpanit@amd.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1440597279-11802-1-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1440597279-11802-1-git-send-email-Suravee.Suthikulpanit@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.222; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10009020)(6009001)(2980300002)(428002)(3050300001)(189002)(199003)(4001540100001)(5001920100001)(5001770100001)(101416001)(2201001)(5003600100002)(19580405001)(5001830100001)(64706001)(53416004)(47776003)(50466002)(5001860100001)(87936001)(106466001)(229853001)(50226001)(86362001)(105586002)(5007970100001)(97736004)(77096005)(189998001)(2950100001)(36756003)(5003940100001)(46102003)(68736005)(92566002)(50986999)(77156002)(76176999)(62966003)(48376002)(19580395003); 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CY1PR12MB0714; 5:hIL5vmSUaBmk1qIZf+H6P8KNuJ+AahTm3zAJCql4zKEp9p10/wPkkCfhiZhNV8kDmb8stim5RAVuZ6/s0cnhCO/LNd8QL+3HpnKvOqjh4Esb1gQXylOFxCrtyRSLbk9HC4OBFX905zpoDLdOCXO9fQ==; 24:E3cVdufpy5WwK/gSI0D1jVFL5YIwPNnOyMRJltCr0NBCo2VE3xT034JaIgYW4BFS7OZMa2ijbgmF8B3AnVWENGga1x8Z0OO3m+4ZnX3VOBI=; 20:WxEdeYJwgNn6BdQZ6ltpdfwQNJ3dSrmv3DPnYFeErpgv2Nowuv4ftalLx7jjwxmemkI7KNSBduHJrAOFHZTBRA== SpamDiagnosticOutput: 1:23 SpamDiagnosticMetadata: NSPM X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Aug 2015 13:55:15.9908 (UTC) X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.222]; Helo=[atltwp02.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR12MB0714 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 This patch adds support for setting up PCI device DMA coherency from ACPI _CCA object that should normally be specified in the DSDT node of its PCI host bridge. Signed-off-by: Suravee Suthikulpanit CC: Bjorn Helgaas CC: Catalin Marinas CC: Rob Herring CC: Will Deacon CC: Rafael J. Wysocki CC: Murali Karicheri --- drivers/pci/probe.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 4de6594..7cfd8e2 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1551,17 +1551,25 @@ static void pci_init_capabilities(struct pci_dev *dev) * @dev: ptr to pci_dev struct of the PCI device * * Function to update PCI devices's DMA configuration using the same - * info from the OF node of host bridge's parent (if any). + * info from the OF node or ACPI node of host bridge's parent (if any). */ static void pci_dma_configure(struct pci_dev *dev) { struct device *bridge = pci_get_host_bridge_device(dev); if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) { - if (!bridge->parent) - return; - - of_dma_configure(&dev->dev, bridge->parent->of_node); + if (bridge->parent) + of_dma_configure(&dev->dev, + bridge->parent->of_node); + } else if (has_acpi_companion(bridge)) { + struct acpi_device *adev = to_acpi_node(bridge->fwnode); + int ret = acpi_check_dma_coherency(adev); + + if (ret < 0) + WARN(1, FW_BUG "PCI device %s fail to setup DMA.\n", + pci_name(dev)); + else + arch_setup_dma_ops(&dev->dev, 0, 0, NULL, ret); } pci_put_host_bridge_device(bridge);