From patchwork Mon Nov 2 16:36:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Edworthy X-Patchwork-Id: 7537361 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 32B9A9F71A for ; Mon, 2 Nov 2015 16:40:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2FB8120595 for ; Mon, 2 Nov 2015 16:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A73720605 for ; Mon, 2 Nov 2015 16:39:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754377AbbKBQjG (ORCPT ); Mon, 2 Nov 2015 11:39:06 -0500 Received: from relmlor3.renesas.com ([210.160.252.173]:9452 "EHLO relmlie2.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754374AbbKBQjE (ORCPT ); Mon, 2 Nov 2015 11:39:04 -0500 Received: from unknown (HELO relmlir1.idc.renesas.com) ([10.200.68.151]) by relmlie2.idc.renesas.com with ESMTP; 03 Nov 2015 01:39:01 +0900 Received: from relmlac2.idc.renesas.com (relmlac2.idc.renesas.com [10.200.69.22]) by relmlir1.idc.renesas.com (Postfix) with ESMTP id 7233E40F80; Tue, 3 Nov 2015 01:39:01 +0900 (JST) Received: by relmlac2.idc.renesas.com (Postfix, from userid 0) id 60D892806E; Tue, 3 Nov 2015 01:39:01 +0900 (JST) Received: from relmlac2.idc.renesas.com (localhost [127.0.0.1]) by relmlac2.idc.renesas.com (Postfix) with ESMTP id 5BD942806D; Tue, 3 Nov 2015 01:39:01 +0900 (JST) Received: from relmlii2.idc.renesas.com [10.200.68.66] by relmlac2.idc.renesas.com with ESMTP id BAB31846; Tue, 3 Nov 2015 01:39:01 +0900 X-IronPort-AV: E=Sophos;i="5.20,234,1444662000"; d="scan'208";a="198921543" Received: from unknown (HELO localhost.localdomain) ([172.29.43.47]) by relmlii2.idc.renesas.com with ESMTP; 03 Nov 2015 01:38:58 +0900 From: Phil Edworthy To: Bjorn Helgaas Cc: Wolfram Sang , Geert Uytterhoeven , Simon Horman , , , , Phil Edworthy Subject: [PATCH 1/3] PCI: pcie-rcar: Convert to DT resource parsing API Date: Mon, 2 Nov 2015 16:36:13 +0000 Message-Id: <1446482175-26507-2-git-send-email-phil.edworthy@renesas.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1446482175-26507-1-git-send-email-phil.edworthy@renesas.com> References: <1446482175-26507-1-git-send-email-phil.edworthy@renesas.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@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 The main purpose of this change is to avoid calling pci_ioremap_io() as this is not available on arm64. However, instead of doing the range passing in this driver we can utilise of_pci_get_host_bridge_resources(). This is similar to changes made to the generic PCI host driver in commit dbf9826d "PCI: generic: Convert to DT resource parsing API". Signed-off-by: Phil Edworthy Reported-by: Wolfram Sang Tested-by: Wolfram Sang --- drivers/pci/host/pcie-rcar.c | 117 +++++++++++++++++++++++++++---------------- 1 file changed, 74 insertions(+), 43 deletions(-) diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index f4fa6c5..27c0521 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -108,8 +108,6 @@ #define RCAR_PCI_MAX_RESOURCES 4 #define MAX_NR_INBOUND_MAPS 6 -static unsigned long global_io_offset; - struct rcar_msi { DECLARE_BITMAP(used, INT_PCI_MSI_NR); struct irq_domain *domain; @@ -138,8 +136,7 @@ struct rcar_pcie { #endif struct device *dev; void __iomem *base; - struct resource res[RCAR_PCI_MAX_RESOURCES]; - struct resource busn; + struct list_head resources; int root_bus_nr; struct clk *clk; struct clk *bus_clk; @@ -323,10 +320,9 @@ static struct pci_ops rcar_pcie_ops = { .write = rcar_pcie_write_conf, }; -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie) +static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, + struct resource *res) { - struct resource *res = &pcie->res[win]; - /* Setup PCIe address space mappings for each resource */ resource_size_t size; resource_size_t res_start; @@ -359,31 +355,33 @@ static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie) rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win)); } -static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pcie) +static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) { - struct resource *res; - int i; - - pcie->root_bus_nr = pcie->busn.start; + struct resource_entry *win; + int i = 0; /* Setup PCI resources */ - for (i = 0; i < RCAR_PCI_MAX_RESOURCES; i++) { + resource_list_for_each_entry(win, &pci->resources) { + struct resource *res = win->res; - res = &pcie->res[i]; if (!res->flags) continue; - rcar_pcie_setup_window(i, pcie); - - if (res->flags & IORESOURCE_IO) { - phys_addr_t io_start = pci_pio_to_address(res->start); - pci_ioremap_io(global_io_offset, io_start); - global_io_offset += SZ_64K; + switch (resource_type(res)) { + case IORESOURCE_IO: + case IORESOURCE_MEM: + rcar_pcie_setup_window(i, pci, res); + i++; + break; + case IORESOURCE_BUS: + pci->root_bus_nr = res->start; + break; + default: + continue; } pci_add_resource(resource, res); } - pci_add_resource(resource, &pcie->busn); return 1; } @@ -923,14 +921,64 @@ static const struct of_device_id rcar_pcie_of_match[] = { }; MODULE_DEVICE_TABLE(of, rcar_pcie_of_match); +static void rcar_pcie_release_of_pci_ranges(struct rcar_pcie *pci) +{ + pci_free_resource_list(&pci->resources); +} + +static int rcar_pcie_parse_request_of_pci_ranges(struct rcar_pcie *pci) +{ + int err, res_valid = 0; + struct device *dev = pci->dev; + struct device_node *np = dev->of_node; + resource_size_t iobase; + struct resource_entry *win; + + err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pci->resources, &iobase); + if (err) + return err; + + resource_list_for_each_entry(win, &pci->resources) { + struct resource *parent, *res = win->res; + + switch (resource_type(res)) { + case IORESOURCE_IO: + parent = &ioport_resource; + err = pci_remap_iospace(res, iobase); + if (err) { + dev_warn(dev, "error %d: failed to map resource %pR\n", + err, res); + continue; + } + break; + case IORESOURCE_MEM: + parent = &iomem_resource; + res_valid |= !(res->flags & IORESOURCE_PREFETCH); + break; + + case IORESOURCE_BUS: + default: + continue; + } + + err = devm_request_resource(dev, parent, res); + if (err) + goto out_release_res; + } + + return 0; + +out_release_res: + rcar_pcie_release_of_pci_ranges(pci); + return err; +} + static int rcar_pcie_probe(struct platform_device *pdev) { struct rcar_pcie *pcie; unsigned int data; - struct of_pci_range range; - struct of_pci_range_parser parser; const struct of_device_id *of_id; - int err, win = 0; + int err; int (*hw_init_fn)(struct rcar_pcie *); pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL); @@ -940,16 +988,9 @@ static int rcar_pcie_probe(struct platform_device *pdev) pcie->dev = &pdev->dev; platform_set_drvdata(pdev, pcie); - /* Get the bus range */ - if (of_pci_parse_bus_range(pdev->dev.of_node, &pcie->busn)) { - dev_err(&pdev->dev, "failed to parse bus-range property\n"); - return -EINVAL; - } + INIT_LIST_HEAD(&pcie->resources); - if (of_pci_range_parser_init(&parser, pdev->dev.of_node)) { - dev_err(&pdev->dev, "missing ranges property\n"); - return -EINVAL; - } + rcar_pcie_parse_request_of_pci_ranges(pcie); err = rcar_pcie_get_resources(pdev, pcie); if (err < 0) { @@ -957,16 +998,6 @@ static int rcar_pcie_probe(struct platform_device *pdev) return err; } - for_each_of_pci_range(&parser, &range) { - err = of_pci_range_to_resource(&range, pdev->dev.of_node, - &pcie->res[win++]); - if (err < 0) - return err; - - if (win > RCAR_PCI_MAX_RESOURCES) - break; - } - err = rcar_pcie_parse_map_dma_ranges(pcie, pdev->dev.of_node); if (err) return err;