From 125a18144253e3a3f4bcad24484ee9b590dc47c6 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Wed, 30 Oct 2019 17:30:57 -0500 Subject: [PATCH] PCI: of: Add inbound resource parsing to helpers Extend devm_of_pci_get_host_bridge_resources() and pci_parse_request_of_pci_ranges() helpers to also parse the inbound addresses from DT 'dma-ranges' and populate a resource list with the translated addresses. This will help ensure 'dma-ranges' is always parsed in a consistent way. Tested-by: Srinath Mannam Tested-by: Thomas Petazzoni # for AArdvark Signed-off-by: Rob Herring Signed-off-by: Lorenzo Pieralisi Reviewed-by: Srinath Mannam Reviewed-by: Andrew Murray Acked-by: Gustavo Pimentel Cc: Jingoo Han Cc: Gustavo Pimentel Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Thomas Petazzoni Cc: Will Deacon Cc: Linus Walleij Cc: Toan Le Cc: Ley Foon Tan Cc: Tom Joseph Cc: Ray Jui Cc: Scott Branden Cc: bcm-kernel-feedback-list@broadcom.com Cc: Ryder Lee Cc: Karthikeyan Mitran Cc: Hou Zhiqiang Cc: Simon Horman Cc: Shawn Lin Cc: Heiko Stuebner Cc: Michal Simek Cc: rfi@lists.rocketboards.org Cc: linux-mediatek@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org (cherry picked from commit 331f63457165a30c708280de2c77f1742c6351dc) --- .../pci/controller/dwc/pcie-designware-host.c | 8 +-- drivers/pci/controller/pci-aardvark.c | 3 +- drivers/pci/controller/pci-ftpci100.c | 4 +- drivers/pci/controller/pci-host-common.c | 2 +- drivers/pci/controller/pci-v3-semi.c | 8 +-- drivers/pci/controller/pci-versatile.c | 3 +- drivers/pci/controller/pci-xgene.c | 4 +- drivers/pci/controller/pcie-altera.c | 5 +- drivers/pci/controller/pcie-cadence-host.c | 2 +- drivers/pci/controller/pcie-iproc-platform.c | 4 +- drivers/pci/controller/pcie-mediatek.c | 4 +- drivers/pci/controller/pcie-mobiveil.c | 4 +- drivers/pci/controller/pcie-rcar.c | 3 +- drivers/pci/controller/pcie-rockchip-host.c | 4 +- drivers/pci/controller/pcie-xilinx-nwl.c | 4 +- drivers/pci/controller/pcie-xilinx.c | 4 +- drivers/pci/of.c | 61 ++++++++++++++++--- drivers/pci/pci.h | 8 ++- include/linux/pci.h | 9 ++- 19 files changed, 96 insertions(+), 48 deletions(-) --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -345,12 +345,8 @@ int dw_pcie_host_init(struct pcie_port * if (!bridge) return -ENOMEM; - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - &bridge->windows, &pp->io_base); - if (ret) - return ret; - - ret = devm_request_pci_bus_resources(dev, &bridge->windows); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (ret) return ret; --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1176,7 +1176,8 @@ static int advk_pcie_probe(struct platfo return ret; } - ret = advk_pcie_parse_request_of_pci_ranges(pcie); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, &bus); if (ret) { dev_err(dev, "Failed to parse resources\n"); return ret; --- a/drivers/pci/controller/pci-ftpci100.c +++ b/drivers/pci/controller/pci-ftpci100.c @@ -480,8 +480,8 @@ static int faraday_pci_probe(struct plat if (IS_ERR(p->base)) return PTR_ERR(p->base); - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - &res, &io_base); + ret = pci_parse_request_of_pci_ranges(dev, &host->windows, + &host->dma_ranges, NULL); if (ret) return ret; --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -27,7 +27,7 @@ static struct pci_config_window *gen_pci struct pci_config_window *cfg; /* Parse our PCI ranges and request their resources */ - err = pci_parse_request_of_pci_ranges(dev, resources, &bus_range); + err = pci_parse_request_of_pci_ranges(dev, resources, NULL, &bus_range); if (err) return ERR_PTR(err); --- a/drivers/pci/controller/pci-v3-semi.c +++ b/drivers/pci/controller/pci-v3-semi.c @@ -793,12 +793,8 @@ static int v3_pci_probe(struct platform_ if (IS_ERR(v3->config_base)) return PTR_ERR(v3->config_base); - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &res, - &io_base); - if (ret) - return ret; - - ret = devm_request_pci_bus_resources(dev, &res); + ret = pci_parse_request_of_pci_ranges(dev, &host->windows, + &host->dma_ranges, NULL); if (ret) return ret; --- a/drivers/pci/controller/pci-versatile.c +++ b/drivers/pci/controller/pci-versatile.c @@ -141,7 +141,8 @@ static int versatile_pci_probe(struct pl if (IS_ERR(versatile_cfg_base[1])) return PTR_ERR(versatile_cfg_base[1]); - ret = versatile_pci_parse_request_of_pci_ranges(dev, &pci_res); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + NULL, NULL); if (ret) return ret; --- a/drivers/pci/controller/pci-xgene.c +++ b/drivers/pci/controller/pci-xgene.c @@ -634,8 +634,8 @@ static int xgene_pcie_probe(struct platf if (ret) return ret; - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &res, - &iobase); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (ret) return ret; --- a/drivers/pci/controller/pcie-altera.c +++ b/drivers/pci/controller/pcie-altera.c @@ -833,9 +833,8 @@ static int altera_pcie_probe(struct plat return ret; } - INIT_LIST_HEAD(&pcie->resources); - - ret = altera_pcie_parse_request_of_pci_ranges(pcie); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (ret) { dev_err(dev, "Failed add resources\n"); return ret; --- a/drivers/pci/controller/pcie-cadence-host.c +++ b/drivers/pci/controller/pcie-cadence-host.c @@ -216,7 +216,7 @@ static int cdns_pcie_host_init(struct de int err; /* Parse our PCI ranges and request their resources */ - err = pci_parse_request_of_pci_ranges(dev, resources, &bus_range); + err = pci_parse_request_of_pci_ranges(dev, resources, NULL, &bus_range); if (err) return err; --- a/drivers/pci/controller/pcie-iproc-platform.c +++ b/drivers/pci/controller/pcie-iproc-platform.c @@ -97,8 +97,8 @@ static int iproc_pcie_pltfm_probe(struct if (IS_ERR(pcie->phy)) return PTR_ERR(pcie->phy); - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &resources, - &iobase); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (ret) { dev_err(dev, "unable to get PCI host bridge resources\n"); return ret; --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -1027,8 +1027,8 @@ static int mtk_pcie_setup(struct mtk_pci resource_size_t io_base; int err; - err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - windows, &io_base); + err = pci_parse_request_of_pci_ranges(dev, windows, + &host->dma_ranges, &bus); if (err) return err; --- a/drivers/pci/controller/pcie-mobiveil.c +++ b/drivers/pci/controller/pcie-mobiveil.c @@ -883,8 +883,8 @@ static int mobiveil_pcie_probe(struct pl INIT_LIST_HEAD(&pcie->resources); /* parse the host bridge base addresses from the device tree file */ - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - &pcie->resources, &iobase); + ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (ret) { dev_err(dev, "Getting bridge resources failed\n"); return ret; --- a/drivers/pci/controller/pcie-rcar.c +++ b/drivers/pci/controller/pcie-rcar.c @@ -1144,7 +1144,8 @@ static int rcar_pcie_probe(struct platfo pcie->dev = dev; platform_set_drvdata(pdev, pcie); - err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); + err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, + &bridge->dma_ranges, NULL); if (err) goto err_free_bridge; --- a/drivers/pci/controller/pcie-rockchip-host.c +++ b/drivers/pci/controller/pcie-rockchip-host.c @@ -995,8 +995,8 @@ static int rockchip_pcie_probe(struct pl if (err < 0) goto err_deinit_port; - err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - &res, &io_base); + err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, &bus_res); if (err) goto err_remove_irq_domain; --- a/drivers/pci/controller/pcie-xilinx-nwl.c +++ b/drivers/pci/controller/pcie-xilinx-nwl.c @@ -857,8 +857,8 @@ static int nwl_pcie_probe(struct platfor return err; } - err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &res, - &iobase); + err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (err) { dev_err(dev, "Getting bridge resources failed\n"); return err; --- a/drivers/pci/controller/pcie-xilinx.c +++ b/drivers/pci/controller/pcie-xilinx.c @@ -647,8 +647,8 @@ static int xilinx_pcie_probe(struct plat return err; } - err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &res, - &iobase); + err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, + &bridge->dma_ranges, NULL); if (err) { dev_err(dev, "Getting bridge resources failed\n"); return err; --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -257,14 +257,16 @@ EXPORT_SYMBOL_GPL(of_pci_check_probe_onl */ int devm_of_pci_get_host_bridge_resources(struct device *dev, unsigned char busno, unsigned char bus_max, - struct list_head *resources, resource_size_t *io_base) + struct list_head *resources, + struct list_head *ib_resources, + resource_size_t *io_base) { struct device_node *dev_node = dev->of_node; struct resource *res, tmp_res; struct resource *bus_range; struct of_pci_range range; struct of_pci_range_parser parser; - char range_type[4]; + const char *range_type; int err; if (io_base) @@ -298,12 +300,12 @@ int devm_of_pci_get_host_bridge_resource for_each_of_pci_range(&parser, &range) { /* Read next ranges element */ if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_IO) - snprintf(range_type, 4, " IO"); + range_type = "IO"; else if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM) - snprintf(range_type, 4, "MEM"); + range_type = "MEM"; else - snprintf(range_type, 4, "err"); - dev_info(dev, " %s %#010llx..%#010llx -> %#010llx\n", + range_type = "err"; + dev_info(dev, " %6s %#012llx..%#012llx -> %#012llx\n", range_type, range.cpu_addr, range.cpu_addr + range.size - 1, range.pci_addr); @@ -340,6 +342,48 @@ int devm_of_pci_get_host_bridge_resource pci_add_resource_offset(resources, res, res->start - range.pci_addr); } + /* Check for dma-ranges property */ + if (!ib_resources) + return 0; + err = of_pci_dma_range_parser_init(&parser, dev_node); + if (err) + return 0; + + dev_dbg(dev, "Parsing dma-ranges property...\n"); + for_each_of_pci_range(&parser, &range) { + struct resource_entry *entry; + /* + * If we failed translation or got a zero-sized region + * then skip this range + */ + if (((range.flags & IORESOURCE_TYPE_BITS) != IORESOURCE_MEM) || + range.cpu_addr == OF_BAD_ADDR || range.size == 0) + continue; + + dev_info(dev, " %6s %#012llx..%#012llx -> %#012llx\n", + "IB MEM", range.cpu_addr, + range.cpu_addr + range.size - 1, range.pci_addr); + + + err = of_pci_range_to_resource(&range, dev_node, &tmp_res); + if (err) + continue; + + res = devm_kmemdup(dev, &tmp_res, sizeof(tmp_res), GFP_KERNEL); + if (!res) { + err = -ENOMEM; + goto failed; + } + + /* Keep the resource list sorted */ + resource_list_for_each_entry(entry, ib_resources) + if (entry->res->start > res->start) + break; + + pci_add_resource_offset(&entry->node, res, + res->start - range.pci_addr); + } + return 0; failed: @@ -482,6 +526,7 @@ EXPORT_SYMBOL_GPL(of_irq_parse_and_map_p int pci_parse_request_of_pci_ranges(struct device *dev, struct list_head *resources, + struct list_head *ib_resources, struct resource **bus_range) { int err, res_valid = 0; @@ -489,8 +534,10 @@ int pci_parse_request_of_pci_ranges(stru struct resource_entry *win, *tmp; INIT_LIST_HEAD(resources); + if (ib_resources) + INIT_LIST_HEAD(ib_resources); err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, resources, - &iobase); + ib_resources, &iobase); if (err) return err; --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -643,11 +643,15 @@ static inline void pci_release_bus_of_no #if defined(CONFIG_OF_ADDRESS) int devm_of_pci_get_host_bridge_resources(struct device *dev, unsigned char busno, unsigned char bus_max, - struct list_head *resources, resource_size_t *io_base); + struct list_head *resources, + struct list_head *ib_resources, + resource_size_t *io_base); #else static inline int devm_of_pci_get_host_bridge_resources(struct device *dev, unsigned char busno, unsigned char bus_max, - struct list_head *resources, resource_size_t *io_base) + struct list_head *resources, + struct list_head *ib_resources, + resource_size_t *io_base) { return -EINVAL; } --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2279,6 +2279,7 @@ struct irq_domain; struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus); int pci_parse_request_of_pci_ranges(struct device *dev, struct list_head *resources, + struct list_head *ib_resources, struct resource **bus_range); /* Arch may override this (weak) */ @@ -2287,9 +2288,11 @@ struct device_node *pcibios_get_phb_of_n #else /* CONFIG_OF */ static inline struct irq_domain * pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; } -static inline int pci_parse_request_of_pci_ranges(struct device *dev, - struct list_head *resources, - struct resource **bus_range) +static inline int +pci_parse_request_of_pci_ranges(struct device *dev, + struct list_head *resources, + struct list_head *ib_resources, + struct resource **bus_range) { return -EINVAL; }