From patchwork Tue Jun 10 18:51:21 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 4330401 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 22DD89F357 for ; Tue, 10 Jun 2014 18:55:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E75D2202C8 for ; Tue, 10 Jun 2014 18:55:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2ECA7201BB for ; Tue, 10 Jun 2014 18:55:20 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WuRAm-0004Vh-7w; Tue, 10 Jun 2014 18:53:28 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WuRA4-0003f9-V3 for linux-arm-kernel@lists.infradead.org; Tue, 10 Jun 2014 18:52:46 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s5AIpKo4021982; Tue, 10 Jun 2014 13:51:20 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5AIpKBu029313; Tue, 10 Jun 2014 13:51:20 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Tue, 10 Jun 2014 13:51:20 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5AIpGKn012701; Tue, 10 Jun 2014 13:51:19 -0500 From: Murali Karicheri To: , , , , Subject: [PATCH v2 2/8] PCI: designware: refactor host init code to re-use on v3.65 DW pci hw Date: Tue, 10 Jun 2014 14:51:21 -0400 Message-ID: <1402426287-31157-3-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1402426287-31157-1-git-send-email-m-karicheri2@ti.com> References: <1402426287-31157-1-git-send-email-m-karicheri2@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140610_115245_184340_3B2A86F2 X-CRM114-Status: GOOD ( 16.30 ) X-Spam-Score: -5.7 (-----) Cc: Richard Zhu , Pratyush Anand , Marek Vasut , Russell King , Pawel Moll , Arnd Bergmann , Ian Campbell , Mohit Kumar , Jingoo Han , Rob Herring , Kishon Vijay Abraham I , Bjorn Helgaas , Murali Karicheri , Santosh Shilimkar , Randy Dunlap , Kumar Gala , Grant Likely , Mark Rutland 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=-2.5 required=5.0 tests=BAYES_00,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 Current DW PCI host init code has code specific to newer hw such as ATU port specific resource parsing and map. v3.65 DW PCI host has MSI controller in application space and requires different controller initialization code. So refactor the msi host controller code into a separate function. Other common functions across both hw versions are moved to dw_pcie_common_host_init() and called from the newer and v3.65 hw host initialization code. Signed-off-by: Murali Karicheri CC: Santosh Shilimkar CC: Russell King CC: Grant Likely CC: Rob Herring CC: Mohit Kumar CC: Jingoo Han CC: Bjorn Helgaas CC: Pratyush Anand CC: Richard Zhu CC: Kishon Vijay Abraham I CC: Marek Vasut CC: Arnd Bergmann CC: Pawel Moll CC: Mark Rutland CC: Ian Campbell CC: Kumar Gala CC: Randy Dunlap CC: Grant Likely --- drivers/pci/host/pcie-designware.c | 136 ++++++++++++++++++++++++++---------- 1 file changed, 101 insertions(+), 35 deletions(-) diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index e8f5d8d..e4bd19a 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -389,13 +389,19 @@ static const struct irq_domain_ops msi_domain_ops = { .map = dw_pcie_msi_map, }; -int __init dw_pcie_host_init(struct pcie_port *pp) +/* + * dw_pcie_parse_resource() - Function to parse common resources + * + * @pp: ptr to pcie port + * + * Parse the range property for MEM, IO and cfg resources, and map + * the cfg register space. + */ +int __init dw_pcie_parse_resource(struct pcie_port *pp) { struct device_node *np = pp->dev->of_node; struct of_pci_range range; struct of_pci_range_parser parser; - u32 val; - int i; if (of_pci_range_parser_init(&parser, np)) { dev_err(pp->dev, "missing ranges property\n"); @@ -431,41 +437,29 @@ int __init dw_pcie_host_init(struct pcie_port *pp) pp->config.cfg1_size = resource_size(&pp->cfg)/2; } } - - if (!pp->dbi_base) { - pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start, - resource_size(&pp->cfg)); - if (!pp->dbi_base) { - dev_err(pp->dev, "error with ioremap\n"); - return -ENOMEM; - } - } - - pp->cfg0_base = pp->cfg.start; - pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size; pp->mem_base = pp->mem.start; - pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base, - pp->config.cfg0_size); - if (!pp->va_cfg0_base) { - dev_err(pp->dev, "error with ioremap in function\n"); - return -ENOMEM; - } - pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base, - pp->config.cfg1_size); - if (!pp->va_cfg1_base) { - dev_err(pp->dev, "error with ioremap\n"); - return -ENOMEM; - } + return 0; +} - if (of_property_read_u32(np, "num-lanes", &pp->lanes)) { - dev_err(pp->dev, "Failed to parse the number of lanes\n"); - return -EINVAL; - } +/* + * dw_pcie_msi_host_init() - Function to initialize msi host controller + * + * @pp: ptr to pcie port + * @np: device node ptr to msi irq controller + * @irq_msi_ops: ptr to MSI irq_domain_ops struct + * + * Function register irq domain for msi irq controller and create mappings + * for MSI irqs. + */ +int dw_pcie_msi_host_init(struct pcie_port *pp, struct device_node *np, + const struct irq_domain_ops *irq_msi_ops) +{ + int i; if (IS_ENABLED(CONFIG_PCI_MSI)) { pp->irq_domain = irq_domain_add_linear(pp->dev->of_node, - MAX_MSI_IRQS, &msi_domain_ops, + MAX_MSI_IRQS, irq_msi_ops, &dw_pcie_msi_chip); if (!pp->irq_domain) { dev_err(pp->dev, "irq domain init failed\n"); @@ -476,6 +470,29 @@ int __init dw_pcie_host_init(struct pcie_port *pp) irq_create_mapping(pp->irq_domain, i); } + return 0; +} + +/* + * dw_pcie_common_host_init() - common host init function across different + * versions of the designware PCI controller. + * @pp: ptr to pcie port + * @hw: ptr to hw_pci structure + * + * This functions parses common DT properties, call host_init() callback + * of the PCI controller driver. Also initialize the common RC configurations + * and call common pci core function to intialize the controller driver. + */ +int __init dw_pcie_common_host_init(struct pcie_port *pp, struct hw_pci *hw) +{ + struct device_node *np = pp->dev->of_node; + u32 val; + + if (of_property_read_u32(np, "num-lanes", &pp->lanes)) { + dev_err(pp->dev, "Failed to parse the number of lanes\n"); + return -EINVAL; + } + if (pp->ops->host_init) pp->ops->host_init(pp); @@ -488,10 +505,10 @@ int __init dw_pcie_host_init(struct pcie_port *pp) val |= PORT_LOGIC_SPEED_CHANGE; dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val); - dw_pci.nr_controllers = 1; - dw_pci.private_data = (void **)&pp; + hw->nr_controllers = 1; + hw->private_data = (void **)&pp; - pci_common_init_dev(pp->dev, &dw_pci); + pci_common_init_dev(pp->dev, hw); pci_assign_unassigned_resources(); #ifdef CONFIG_PCI_DOMAINS dw_pci.domain++; @@ -500,6 +517,55 @@ int __init dw_pcie_host_init(struct pcie_port *pp) return 0; } +/* + * dw_pcie_host_init() - Host init function for new designware h/w + * + * @pp: ptr to pcie port + * + * The function parse the PCI resurces for IO, Memory and map the config + * space addresses. Also initliaze the MSI irq controller and call + * dw_pcie_common_host_init() to initialize the PCI controller. + */ +int __init dw_pcie_host_init(struct pcie_port *pp) +{ + int ret; + + ret = dw_pcie_parse_resource(pp); + if (ret) + return ret; + + if (!pp->dbi_base) { + pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start, + resource_size(&pp->cfg)); + if (!pp->dbi_base) { + dev_err(pp->dev, "error with ioremap\n"); + return -ENOMEM; + } + } + + pp->cfg0_base = pp->cfg.start; + pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size; + + pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base, + pp->config.cfg0_size); + if (!pp->va_cfg0_base) { + dev_err(pp->dev, "error with ioremap in function\n"); + return -ENOMEM; + } + pp->va_cfg1_base = devm_ioremap(pp->dev, pp->cfg1_base, + pp->config.cfg1_size); + if (!pp->va_cfg1_base) { + dev_err(pp->dev, "error with ioremap\n"); + return -ENOMEM; + } + + ret = dw_pcie_msi_host_init(pp, pp->dev->of_node, &msi_domain_ops); + if (ret < 0) + return ret; + + return dw_pcie_common_host_init(pp, &dw_pci); +} + static void dw_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev) { /* Program viewport 0 : OUTBOUND : CFG0 */