PCI: of: Add inbound resource parsing to helpers

robherring · Lorenzo Pieralisi · commit 331f63457165 · 2019-11-20T16:59:58.000Z
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 &lt;srinath.mannam@broadcom.com&gt;
Tested-by: Thomas Petazzoni &lt;thomas.petazzoni@bootlin.com&gt; # for AArdvark
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
Signed-off-by: Lorenzo Pieralisi &lt;lorenzo.pieralisi@arm.com&gt;
Reviewed-by: Srinath Mannam &lt;srinath.mannam@broadcom.com&gt;
Reviewed-by: Andrew Murray &lt;andrew.murray@arm.com&gt;
Acked-by: Gustavo Pimentel &lt;gustavo.pimentel@synopsys.com&gt;
Cc: Jingoo Han &lt;jingoohan1@gmail.com&gt;
Cc: Gustavo Pimentel &lt;gustavo.pimentel@synopsys.com&gt;
Cc: Lorenzo Pieralisi &lt;lorenzo.pieralisi@arm.com&gt;
Cc: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
Cc: Thomas Petazzoni &lt;thomas.petazzoni@bootlin.com&gt;
Cc: Will Deacon &lt;will@kernel.org&gt;
Cc: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Cc: Toan Le &lt;toan@os.amperecomputing.com&gt;
Cc: Ley Foon Tan &lt;lftan@altera.com&gt;
Cc: Tom Joseph &lt;tjoseph@cadence.com&gt;
Cc: Ray Jui &lt;rjui@broadcom.com&gt;
Cc: Scott Branden &lt;sbranden@broadcom.com&gt;
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Ryder Lee &lt;ryder.lee@mediatek.com&gt;
Cc: Karthikeyan Mitran &lt;m.karthikeyan@mobiveil.co.in&gt;
Cc: Hou Zhiqiang &lt;Zhiqiang.Hou@nxp.com&gt;
Cc: Simon Horman &lt;horms@verge.net.au&gt;
Cc: Shawn Lin &lt;shawn.lin@rock-chips.com&gt;
Cc: Heiko Stuebner &lt;heiko@sntech.de&gt;
Cc: Michal Simek &lt;michal.simek@xilinx.com&gt;
Cc: rfi@lists.rocketboards.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -342,7 +342,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	if (!bridge)
 		return -ENOMEM;
 
-	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
+					      &bridge->dma_ranges, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
@@ -939,7 +939,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
 	}
 
 	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
-					      &bus);
+					      &bridge->dma_ranges, &bus);
 	if (ret) {
 		dev_err(dev, "Failed to parse resources\n");
 		return ret;
diff --git a/drivers/pci/controller/pci-ftpci100.c b/drivers/pci/controller/pci-ftpci100.c
@@ -477,7 +477,8 @@ static int faraday_pci_probe(struct platform_device *pdev)
 	if (IS_ERR(p->base))
 		return PTR_ERR(p->base);
 
-	ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
+	ret = pci_parse_request_of_pci_ranges(dev, &host->windows,
+					      &host->dma_ranges, NULL);
 	if (ret)
 		return ret;
 
diff --git 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_init(struct device *dev,
 	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);
 
diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
@@ -776,7 +776,8 @@ static int v3_pci_probe(struct platform_device *pdev)
 	if (IS_ERR(v3->config_base))
 		return PTR_ERR(v3->config_base);
 
-	ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
+	ret = pci_parse_request_of_pci_ranges(dev, &host->windows,
+					      &host->dma_ranges, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/pci/controller/pci-versatile.c b/drivers/pci/controller/pci-versatile.c
@@ -92,7 +92,8 @@ static int versatile_pci_probe(struct platform_device *pdev)
 	if (IS_ERR(versatile_cfg_base[1]))
 		return PTR_ERR(versatile_cfg_base[1]);
 
-	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
+					      NULL, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/pci/controller/pci-xgene.c b/drivers/pci/controller/pci-xgene.c
@@ -627,7 +627,8 @@ static int xgene_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
+					      &bridge->dma_ranges, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/pci/controller/pcie-altera.c b/drivers/pci/controller/pcie-altera.c
@@ -800,7 +800,7 @@ static int altera_pcie_probe(struct platform_device *pdev)
 	}
 
 	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
-					      NULL);
+					      &bridge->dma_ranges, NULL);
 	if (ret) {
 		dev_err(dev, "Failed add resources\n");
 		return ret;
diff --git a/drivers/pci/controller/pcie-cadence-host.c b/drivers/pci/controller/pcie-cadence-host.c
@@ -211,7 +211,7 @@ static int cdns_pcie_host_init(struct device *dev,
 	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;
 
diff --git a/drivers/pci/controller/pcie-iproc-platform.c b/drivers/pci/controller/pcie-iproc-platform.c
@@ -95,7 +95,8 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
 	if (IS_ERR(pcie->phy))
 		return PTR_ERR(pcie->phy);
 
-	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	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;
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
@@ -1034,7 +1034,7 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
 	int err;
 
 	err = pci_parse_request_of_pci_ranges(dev, windows,
-					      &bus);
+					      &host->dma_ranges, &bus);
 	if (err)
 		return err;
 
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
@@ -875,7 +875,8 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	}
 
 	/* parse the host bridge base addresses from the device tree file */
-	ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	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;
diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
@@ -1138,7 +1138,8 @@ static int rcar_pcie_probe(struct platform_device *pdev)
 	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;
 
diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
@@ -1004,7 +1004,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 	if (err < 0)
 		goto err_deinit_port;
 
-	err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, &bus_res);
+	err = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
+					      &bridge->dma_ranges, &bus_res);
 	if (err)
 		goto err_remove_irq_domain;
 
diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -843,7 +843,8 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	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;
diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c
@@ -645,7 +645,8 @@ static int xilinx_pcie_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	err = pci_parse_request_of_pci_ranges(dev, &bridge->windows, NULL);
+	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;
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
@@ -257,14 +257,16 @@ EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
  */
 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_resources(struct device *dev,
 	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_resources(struct device *dev,
 		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:
@@ -482,15 +526,18 @@ EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);
 
 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;
 	resource_size_t iobase;
 	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;
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
@@ -633,11 +633,15 @@ static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
 #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;
 }
diff --git a/include/linux/pci.h b/include/linux/pci.h
@@ -2278,6 +2278,7 @@ 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) */
@@ -2286,9 +2287,11 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
 #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;
 }

Original file line number	Diff line number	Diff line change
`@@ -939,7 +939,7 @@ static int advk_pcie_probe(struct platform_device *pdev)`
`939`	`939`	`}`
`940`	`940`
`941`	`941`	`ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,`
`942`		`- &bus);`
	`942`	`+ &bridge->dma_ranges, &bus);`
`943`	`943`	`if (ret) {`
`944`	`944`	`dev_err(dev, "Failed to parse resources\n");`
`945`	`945`	`return ret;`
Original file line number	Diff line number	Diff line change
`@@ -800,7 +800,7 @@ static int altera_pcie_probe(struct platform_device *pdev)`
`800`	`800`	`}`
`801`	`801`
`802`	`802`	`ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,`
`803`		`- NULL);`
	`803`	`+ &bridge->dma_ranges, NULL);`
`804`	`804`	`if (ret) {`
`805`	`805`	`dev_err(dev, "Failed add resources\n");`
`806`	`806`	`return ret;`