Merge branch 'remotes/lorenzo/pci/host-generic'

  - Constify struct pci_ecam_ops (Rob Herring)

  - Support building as modules (Rob Herring)

  - Eliminate wrappers for pci_host_common_probe() by using DT match table
    data (Rob Herring)

* remotes/lorenzo/pci/host-generic:
  PCI: host-generic: Eliminate pci_host_common_probe wrappers
  PCI: host-generic: Support building as modules
  PCI: Constify struct pci_ecam_ops

# Conflicts:
#	drivers/pci/controller/dwc/pcie-hisi.c

11 files changed, 59 insertions, 64 deletions

diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 91bfdb784829..416a53414728 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -62,11 +62,11 @@ config PCIE_RCAR
 	  Say Y here if you want PCIe controller support on R-Car SoCs.
 
 config PCI_HOST_COMMON
-	bool
+	tristate
 	select PCI_ECAM
 
 config PCI_HOST_GENERIC
-	bool "Generic PCI host controller"
+	tristate "Generic PCI host controller"
 	depends on OF
 	select PCI_HOST_COMMON
 	select IRQ_DOMAIN
diff --git a/drivers/pci/controller/dwc/pcie-al.c b/drivers/pci/controller/dwc/pcie-al.c
index 1eeda2f6371f..270868f3859a 100644
--- a/drivers/pci/controller/dwc/pcie-al.c
+++ b/drivers/pci/controller/dwc/pcie-al.c
@@ -80,7 +80,7 @@ static int al_pcie_init(struct pci_config_window *cfg)
 	return 0;
 }
 
-struct pci_ecam_ops al_pcie_ops = {
+const struct pci_ecam_ops al_pcie_ops = {
 	.bus_shift    = 20,
 	.init         =  al_pcie_init,
 	.pci_ops      = {
diff --git a/drivers/pci/controller/dwc/pcie-hisi.c b/drivers/pci/controller/dwc/pcie-hisi.c
index 11f5ff711d4d..0ad4e07dd4c2 100644
--- a/drivers/pci/controller/dwc/pcie-hisi.c
+++ b/drivers/pci/controller/dwc/pcie-hisi.c
@@ -104,7 +104,7 @@ static int hisi_pcie_init(struct pci_config_window *cfg)
 	return 0;
 }
 
-struct pci_ecam_ops hisi_pcie_ops = {
+const struct pci_ecam_ops hisi_pcie_ops = {
 	.bus_shift    = 20,
 	.init         =  hisi_pcie_init,
 	.pci_ops      = {
@@ -332,15 +332,6 @@ static struct platform_driver hisi_pcie_driver = {
 };
 builtin_platform_driver(hisi_pcie_driver);
 
-static int hisi_pcie_almost_ecam_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct pci_ecam_ops *ops;
-
-	ops = (struct pci_ecam_ops *)of_device_get_match_data(dev);
-	return pci_host_common_probe(pdev, ops);
-}
-
 static int hisi_pcie_platform_init(struct pci_config_window *cfg)
 {
 	struct device *dev = cfg->parent;
@@ -362,7 +353,7 @@ static int hisi_pcie_platform_init(struct pci_config_window *cfg)
 	return 0;
 }
 
-static struct pci_ecam_ops hisi_pcie_platform_ops = {
+static const struct pci_ecam_ops hisi_pcie_platform_ops = {
 	.bus_shift    = 20,
 	.init         =  hisi_pcie_platform_init,
 	.pci_ops      = {
@@ -375,17 +366,17 @@ static struct pci_ecam_ops hisi_pcie_platform_ops = {
 static const struct of_device_id hisi_pcie_almost_ecam_of_match[] = {
 	{
 		.compatible =  "hisilicon,hip06-pcie-ecam",
-		.data	    = (void *) &hisi_pcie_platform_ops,
+		.data	    =  &hisi_pcie_platform_ops,
 	},
 	{
 		.compatible =  "hisilicon,hip07-pcie-ecam",
-		.data       = (void *) &hisi_pcie_platform_ops,
+		.data       =  &hisi_pcie_platform_ops,
 	},
 	{},
 };
 
 static struct platform_driver hisi_pcie_almost_ecam_driver = {
-	.probe  = hisi_pcie_almost_ecam_probe,
+	.probe  = pci_host_common_probe,
 	.driver = {
 		   .name = "hisi-pcie-almost-ecam",
 		   .of_match_table = hisi_pcie_almost_ecam_of_match,
diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
index 250a3fc80ec6..953de57f6c57 100644
--- a/drivers/pci/controller/pci-host-common.c
+++ b/drivers/pci/controller/pci-host-common.c
@@ -8,7 +8,9 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/of_pci.h>
 #include <linux/pci-ecam.h>
 #include <linux/platform_device.h>
@@ -19,7 +21,7 @@ static void gen_pci_unmap_cfg(void *ptr)
 }
 
 static struct pci_config_window *gen_pci_init(struct device *dev,
-		struct list_head *resources, struct pci_ecam_ops *ops)
+		struct list_head *resources, const struct pci_ecam_ops *ops)
 {
 	int err;
 	struct resource cfgres;
@@ -54,15 +56,19 @@ err_out:
 	return ERR_PTR(err);
 }
 
-int pci_host_common_probe(struct platform_device *pdev,
-			  struct pci_ecam_ops *ops)
+int pci_host_common_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct pci_host_bridge *bridge;
 	struct pci_config_window *cfg;
 	struct list_head resources;
+	const struct pci_ecam_ops *ops;
 	int ret;
 
+	ops = of_device_get_match_data(&pdev->dev);
+	if (!ops)
+		return -ENODEV;
+
 	bridge = devm_pci_alloc_host_bridge(dev, 0);
 	if (!bridge)
 		return -ENOMEM;
@@ -82,7 +88,7 @@ int pci_host_common_probe(struct platform_device *pdev,
 	bridge->dev.parent = dev;
 	bridge->sysdata = cfg;
 	bridge->busnr = cfg->busr.start;
-	bridge->ops = &ops->pci_ops;
+	bridge->ops = (struct pci_ops *)&ops->pci_ops;
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
@@ -95,6 +101,7 @@ int pci_host_common_probe(struct platform_device *pdev,
 	platform_set_drvdata(pdev, bridge->bus);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_host_common_probe);
 
 int pci_host_common_remove(struct platform_device *pdev)
 {
@@ -107,3 +114,6 @@ int pci_host_common_remove(struct platform_device *pdev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_host_common_remove);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/controller/pci-host-generic.c b/drivers/pci/controller/pci-host-generic.c
index 75a2fb930d4b..b51977abfdf1 100644
--- a/drivers/pci/controller/pci-host-generic.c
+++ b/drivers/pci/controller/pci-host-generic.c
@@ -10,12 +10,11 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
+#include <linux/module.h>
 #include <linux/pci-ecam.h>
 #include <linux/platform_device.h>
 
-static struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
+static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
 	.bus_shift	= 16,
 	.pci_ops	= {
 		.map_bus	= pci_ecam_map_bus,
@@ -49,7 +48,7 @@ static void __iomem *pci_dw_ecam_map_bus(struct pci_bus *bus,
 	return pci_ecam_map_bus(bus, devfn, where);
 }
 
-static struct pci_ecam_ops pci_dw_ecam_bus_ops = {
+static const struct pci_ecam_ops pci_dw_ecam_bus_ops = {
 	.bus_shift	= 20,
 	.pci_ops	= {
 		.map_bus	= pci_dw_ecam_map_bus,
@@ -76,25 +75,16 @@ static const struct of_device_id gen_pci_of_match[] = {
 
 	{ },
 };
-
-static int gen_pci_probe(struct platform_device *pdev)
-{
-	const struct of_device_id *of_id;
-	struct pci_ecam_ops *ops;
-
-	of_id = of_match_node(gen_pci_of_match, pdev->dev.of_node);
-	ops = (struct pci_ecam_ops *)of_id->data;
-
-	return pci_host_common_probe(pdev, ops);
-}
+MODULE_DEVICE_TABLE(of, gen_pci_of_match);
 
 static struct platform_driver gen_pci_driver = {
 	.driver = {
 		.name = "pci-host-generic",
 		.of_match_table = gen_pci_of_match,
-		.suppress_bind_attrs = true,
 	},
-	.probe = gen_pci_probe,
+	.probe = pci_host_common_probe,
 	.remove = pci_host_common_remove,
 };
-builtin_platform_driver(gen_pci_driver);
+module_platform_driver(gen_pci_driver);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/controller/pci-thunder-ecam.c b/drivers/pci/controller/pci-thunder-ecam.c
index 32d1d7b81ef4..7e8835fee5f7 100644
--- a/drivers/pci/controller/pci-thunder-ecam.c
+++ b/drivers/pci/controller/pci-thunder-ecam.c
@@ -345,7 +345,7 @@ static int thunder_ecam_config_write(struct pci_bus *bus, unsigned int devfn,
 	return pci_generic_config_write(bus, devfn, where, size, val);
 }
 
-struct pci_ecam_ops pci_thunder_ecam_ops = {
+const struct pci_ecam_ops pci_thunder_ecam_ops = {
 	.bus_shift	= 20,
 	.pci_ops	= {
 		.map_bus        = pci_ecam_map_bus,
@@ -357,22 +357,20 @@ struct pci_ecam_ops pci_thunder_ecam_ops = {
 #ifdef CONFIG_PCI_HOST_THUNDER_ECAM
 
 static const struct of_device_id thunder_ecam_of_match[] = {
-	{ .compatible = "cavium,pci-host-thunder-ecam" },
+	{
+		.compatible = "cavium,pci-host-thunder-ecam",
+		.data = &pci_thunder_ecam_ops,
+	},
 	{ },
 };
 
-static int thunder_ecam_probe(struct platform_device *pdev)
-{
-	return pci_host_common_probe(pdev, &pci_thunder_ecam_ops);
-}
-
 static struct platform_driver thunder_ecam_driver = {
 	.driver = {
 		.name = KBUILD_MODNAME,
 		.of_match_table = thunder_ecam_of_match,
 		.suppress_bind_attrs = true,
 	},
-	.probe = thunder_ecam_probe,
+	.probe = pci_host_common_probe,
 };
 builtin_platform_driver(thunder_ecam_driver);
 
diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/controller/pci-thunder-pem.c
index 9491e266b1ea..3f847969143e 100644
--- a/drivers/pci/controller/pci-thunder-pem.c
+++ b/drivers/pci/controller/pci-thunder-pem.c
@@ -403,7 +403,7 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg)
 	return thunder_pem_init(dev, cfg, res_pem);
 }
 
-struct pci_ecam_ops thunder_pem_ecam_ops = {
+const struct pci_ecam_ops thunder_pem_ecam_ops = {
 	.bus_shift	= 24,
 	.init		= thunder_pem_acpi_init,
 	.pci_ops	= {
@@ -440,7 +440,7 @@ static int thunder_pem_platform_init(struct pci_config_window *cfg)
 	return thunder_pem_init(dev, cfg, res_pem);
 }
 
-static struct pci_ecam_ops pci_thunder_pem_ops = {
+static const struct pci_ecam_ops pci_thunder_pem_ops = {
 	.bus_shift	= 24,
 	.init		= thunder_pem_platform_init,
 	.pci_ops	= {
@@ -451,22 +451,20 @@ static struct pci_ecam_ops pci_thunder_pem_ops = {
 };
 
 static const struct of_device_id thunder_pem_of_match[] = {
-	{ .compatible = "cavium,pci-host-thunder-pem" },
+	{
+		.compatible = "cavium,pci-host-thunder-pem",
+		.data = &pci_thunder_pem_ops,
+	},
 	{ },
 };
 
-static int thunder_pem_probe(struct platform_device *pdev)
-{
-	return pci_host_common_probe(pdev, &pci_thunder_pem_ops);
-}
-
 static struct platform_driver thunder_pem_driver = {
 	.driver = {
 		.name = KBUILD_MODNAME,
 		.of_match_table = thunder_pem_of_match,
 		.suppress_bind_attrs = true,
 	},
-	.probe = thunder_pem_probe,
+	.probe = pci_host_common_probe,
 };
 builtin_platform_driver(thunder_pem_driver);
 
diff --git a/drivers/pci/controller/pci-xgene.c b/drivers/pci/controller/pci-xgene.c
index de195fd430dc..d1efa8ffbae1 100644
--- a/drivers/pci/controller/pci-xgene.c
+++ b/drivers/pci/controller/pci-xgene.c
@@ -256,7 +256,7 @@ static int xgene_v1_pcie_ecam_init(struct pci_config_window *cfg)
 	return xgene_pcie_ecam_init(cfg, XGENE_PCIE_IP_VER_1);
 }
 
-struct pci_ecam_ops xgene_v1_pcie_ecam_ops = {
+const struct pci_ecam_ops xgene_v1_pcie_ecam_ops = {
 	.bus_shift	= 16,
 	.init		= xgene_v1_pcie_ecam_init,
 	.pci_ops	= {
@@ -271,7 +271,7 @@ static int xgene_v2_pcie_ecam_init(struct pci_config_window *cfg)
 	return xgene_pcie_ecam_init(cfg, XGENE_PCIE_IP_VER_2);
 }
 
-struct pci_ecam_ops xgene_v2_pcie_ecam_ops = {
+const struct pci_ecam_ops xgene_v2_pcie_ecam_ops = {
 	.bus_shift	= 16,
 	.init		= xgene_v2_pcie_ecam_init,
 	.pci_ops	= {
diff --git a/drivers/pci/controller/pcie-tango.c b/drivers/pci/controller/pcie-tango.c
index 18c2c4313eb5..8f640c70f936 100644
--- a/drivers/pci/controller/pcie-tango.c
+++ b/drivers/pci/controller/pcie-tango.c
@@ -207,7 +207,7 @@ static int smp8759_config_write(struct pci_bus *bus, unsigned int devfn,
 	return ret;
 }
 
-static struct pci_ecam_ops smp8759_ecam_ops = {
+static const struct pci_ecam_ops smp8759_ecam_ops = {
 	.bus_shift	= 20,
 	.pci_ops	= {
 		.map_bus	= pci_ecam_map_bus,
@@ -295,11 +295,14 @@ static int tango_pcie_probe(struct platform_device *pdev)
 	spin_lock_init(&pcie->used_msi_lock);
 	irq_set_chained_handler_and_data(virq, tango_msi_isr, pcie);
 
-	return pci_host_common_probe(pdev, &smp8759_ecam_ops);
+	return pci_host_common_probe(pdev);
 }
 
 static const struct of_device_id tango_pcie_ids[] = {
-	{ .compatible = "sigma,smp8759-pcie" },
+	{
+		.compatible = "sigma,smp8759-pcie",
+		.data = &smp8759_ecam_ops,
+	},
 	{ },
 };
 
diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c
index 1a81af0ba961..8f065a42fc1a 100644
--- a/drivers/pci/ecam.c
+++ b/drivers/pci/ecam.c
@@ -26,7 +26,7 @@ static const bool per_bus_mapping = !IS_ENABLED(CONFIG_64BIT);
  */
 struct pci_config_window *pci_ecam_create(struct device *dev,
 		struct resource *cfgres, struct resource *busr,
-		struct pci_ecam_ops *ops)
+		const struct pci_ecam_ops *ops)
 {
 	struct pci_config_window *cfg;
 	unsigned int bus_range, bus_range_max, bsz;
@@ -101,6 +101,7 @@ err_exit:
 	pci_ecam_free(cfg);
 	return ERR_PTR(err);
 }
+EXPORT_SYMBOL_GPL(pci_ecam_create);
 
 void pci_ecam_free(struct pci_config_window *cfg)
 {
@@ -121,6 +122,7 @@ void pci_ecam_free(struct pci_config_window *cfg)
 		release_resource(&cfg->res);
 	kfree(cfg);
 }
+EXPORT_SYMBOL_GPL(pci_ecam_free);
 
 /*
  * Function to implement the pci_ops ->map_bus method
@@ -143,9 +145,10 @@ void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
 		base = cfg->win + (busn << cfg->ops->bus_shift);
 	return base + (devfn << devfn_shift) + where;
 }
+EXPORT_SYMBOL_GPL(pci_ecam_map_bus);
 
 /* ECAM ops */
-struct pci_ecam_ops pci_generic_ecam_ops = {
+const struct pci_ecam_ops pci_generic_ecam_ops = {
 	.bus_shift	= 20,
 	.pci_ops	= {
 		.map_bus	= pci_ecam_map_bus,
@@ -153,10 +156,11 @@ struct pci_ecam_ops pci_generic_ecam_ops = {
 		.write		= pci_generic_config_write,
 	}
 };
+EXPORT_SYMBOL_GPL(pci_generic_ecam_ops);
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
 /* ECAM ops for 32-bit access only (non-compliant) */
-struct pci_ecam_ops pci_32b_ops = {
+const struct pci_ecam_ops pci_32b_ops = {
 	.bus_shift	= 20,
 	.pci_ops	= {
 		.map_bus	= pci_ecam_map_bus,
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 07cd7a3817dc..9b94b1f16d80 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -26,6 +26,7 @@
 #include "pci.h"
 
 unsigned int pci_flags;
+EXPORT_SYMBOL_GPL(pci_flags);
 
 struct pci_dev_resource {
 	struct list_head list;