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path: root/drivers/pci/host/pci-host-generic.c
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Diffstat (limited to 'drivers/pci/host/pci-host-generic.c')
-rw-r--r--drivers/pci/host/pci-host-generic.c52
1 files changed, 33 insertions, 19 deletions
diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
index ba46e581d..265dd2516 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -38,7 +38,16 @@ struct gen_pci_cfg_windows {
const struct gen_pci_cfg_bus_ops *ops;
};
+/*
+ * ARM pcibios functions expect the ARM struct pci_sys_data as the PCI
+ * sysdata. Add pci_sys_data as the first element in struct gen_pci so
+ * that when we use a gen_pci pointer as sysdata, it is also a pointer to
+ * a struct pci_sys_data.
+ */
struct gen_pci {
+#ifdef CONFIG_ARM
+ struct pci_sys_data sys;
+#endif
struct pci_host_bridge host;
struct gen_pci_cfg_windows cfg;
struct list_head resources;
@@ -48,8 +57,7 @@ static void __iomem *gen_pci_map_cfg_bus_cam(struct pci_bus *bus,
unsigned int devfn,
int where)
{
- struct pci_sys_data *sys = bus->sysdata;
- struct gen_pci *pci = sys->private_data;
+ struct gen_pci *pci = bus->sysdata;
resource_size_t idx = bus->number - pci->cfg.bus_range->start;
return pci->cfg.win[idx] + ((devfn << 8) | where);
@@ -64,8 +72,7 @@ static void __iomem *gen_pci_map_cfg_bus_ecam(struct pci_bus *bus,
unsigned int devfn,
int where)
{
- struct pci_sys_data *sys = bus->sysdata;
- struct gen_pci *pci = sys->private_data;
+ struct gen_pci *pci = bus->sysdata;
resource_size_t idx = bus->number - pci->cfg.bus_range->start;
return pci->cfg.win[idx] + ((devfn << 12) | where);
@@ -198,13 +205,6 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci)
return 0;
}
-static int gen_pci_setup(int nr, struct pci_sys_data *sys)
-{
- struct gen_pci *pci = sys->private_data;
- list_splice_init(&pci->resources, &sys->resources);
- return 1;
-}
-
static int gen_pci_probe(struct platform_device *pdev)
{
int err;
@@ -214,13 +214,7 @@ static int gen_pci_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct gen_pci *pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
- struct hw_pci hw = {
- .nr_controllers = 1,
- .private_data = (void **)&pci,
- .setup = gen_pci_setup,
- .map_irq = of_irq_parse_and_map_pci,
- .ops = &gen_pci_ops,
- };
+ struct pci_bus *bus, *child;
if (!pci)
return -ENOMEM;
@@ -258,7 +252,27 @@ static int gen_pci_probe(struct platform_device *pdev)
return err;
}
- pci_common_init_dev(dev, &hw);
+ /* Do not reassign resources if probe only */
+ if (!pci_has_flag(PCI_PROBE_ONLY))
+ pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
+
+ bus = pci_scan_root_bus(dev, 0, &gen_pci_ops, pci, &pci->resources);
+ if (!bus) {
+ dev_err(dev, "Scanning rootbus failed");
+ return -ENODEV;
+ }
+
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+
+ if (!pci_has_flag(PCI_PROBE_ONLY)) {
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ }
+
+ pci_bus_add_devices(bus);
return 0;
}