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Tue, 11 Nov 2014 13:17:51 -0600 (CST) Received: from SATLEXDAG01.amd.com (10.181.40.3) by satlvexedge01.amd.com (10.177.96.28) with Microsoft SMTP Server (TLS) id 14.3.195.1; Tue, 11 Nov 2014 13:18:04 -0600 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; Tue, 11 Nov 2014 14:17:50 -0500 From: To: Subject: [PATCH V2 2/2] PCI: generic: Add msi_parent DT binding Date: Tue, 11 Nov 2014 13:17:34 -0600 Message-ID: <1415733454-24322-3-git-send-email-suravee.suthikulpanit@amd.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1415733454-24322-1-git-send-email-suravee.suthikulpanit@amd.com> References: <1415733454-24322-1-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:(10019020)(6009001)(428002)(189002)(199003)(64706001)(86362001)(53416004)(47776003)(20776003)(110136001)(229853001)(21056001)(84676001)(68736004)(97736003)(44976005)(99396003)(19580395003)(19580405001)(33646002)(120916001)(107046002)(2351001)(105586002)(89996001)(102836001)(50466002)(77156002)(62966003)(77096003)(87936001)(50226001)(4396001)(106466001)(87286001)(88136002)(36756003)(86152002)(46102003)(104166001)(95666004)(93916002)(31966008)(76176999)(48376002)(92566001)(101416001)(50986999)(92726001)(41533002); DIR:OUT; SFP:1102; SCL:1; SRVR:CO1PR02MB206; H:atltwp02.amd.com; FPR:; MLV:sfv; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:CO1PR02MB206; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA: BCL:0;PCL:0;RULEID:;SRVR:CO1PR02MB206; X-Forefront-PRVS: 0392679D18 Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=Suravee.Suthikulpanit@amd.com; X-Exchange-Antispam-Report-CFA: BCL:0;PCL:0;RULEID:;SRVR:CO1PR02MB206; X-OriginatorOrg: amd4.onmicrosoft.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141111_111819_978213_D9233BD4 X-CRM114-Status: GOOD ( 11.43 ) X-Spam-Score: -0.0 (/) Cc: lorenzo.pieralisi@arm.com, liviu.dudau@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, Suravee Suthikulpanit , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, 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: Suravee Suthikulpanit This patch introduces a new DT binding, msi-parent, which can be used to specify MSI-parent phandle for a particular PCI generic host controller. Also, it implements and registers set_msi_parent callback. Cc: Bjorn Helgass Cc: Liviu Dudau Cc: Will Deacon Cc: Lorenzo Pieralisi Signed-off-by: Suravee Suthikulpanit --- Documentation/devicetree/bindings/pci/host-generic-pci.txt | 3 +++ drivers/pci/host/pci-host-generic.c | 13 +++++++++++++ 2 files changed, 16 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt b/Documentation/devicetree/bindings/pci/host-generic-pci.txt index cf3e205..6996af7 100644 --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt @@ -36,6 +36,8 @@ Properties of the host controller node: - reg : The Configuration Space base address and size, as accessed from the parent bus. +- msi-parent : Specify the phandle of the corresponded MSI controller + for this PCI host controller. Properties of the /chosen node: @@ -77,6 +79,7 @@ pci { device_type = "pci"; #address-cells = <3>; #size-cells = <2>; + msi-parent = <&msictrl0>; bus-range = <0x0 0x1>; // CPU_PHYSICAL(2) SIZE(2) diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c index 1895907..c4fbcda 100644 --- a/drivers/pci/host/pci-host-generic.c +++ b/drivers/pci/host/pci-host-generic.c @@ -42,6 +42,7 @@ struct gen_pci { struct pci_host_bridge host; struct gen_pci_cfg_windows cfg; struct list_head resources; + struct msi_chip *mchip; }; static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus, @@ -122,9 +123,19 @@ static int gen_pci_config_write(struct pci_bus *bus, unsigned int devfn, return PCIBIOS_SUCCESSFUL; } +static int gen_pci_set_msi_parent(struct pci_bus *bus) +{ + struct gen_pci *pci = bus_to_gen_pci(bus); + + bus->msi = pci->mchip; + + return PCIBIOS_SUCCESSFUL; +} + static struct pci_ops gen_pci_ops = { .read = gen_pci_config_read, .write = gen_pci_config_write, + .set_msi_parent = gen_pci_set_msi_parent, }; static const struct of_device_id gen_pci_of_match[] = { @@ -303,6 +314,8 @@ static int gen_pci_probe(struct platform_device *pdev) return err; } + pci->mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np, + "msi-parent", 0)); pci_common_init_dev(dev, &hw); return 0; }