[PATCH v7 31/50] powerpc/pci: Export pci_add_device_node_info()

Gavin Shan
2015-11-04T13:41:09Z

This renames update_dn_pci_info() to pci_add_device_node_info()
with corresponding adjustment on the parameter type and exports it.
The function is used to create pdn (struct pci_dn) for the indicated
device node. Another function add_pdn(), almost wrapper of
pci_add_device_node_info(), to be used in traverse_pci_devices(). No
logical changes introduced.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/pci-bridge.h | 3 ++-
arch/powerpc/kernel/pci_dn.c | 30 +++++++++++++++++++-----------
arch/powerpc/platforms/pseries/setup.c | 2 +-
3 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 28385cb..7e0c67d 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -235,7 +235,8 @@ extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev);
extern void remove_dev_pci_data(struct pci_dev *pdev);
-extern void *update_dn_pci_info(struct device_node *dn, void *data);
+extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
+ struct device_node *dn);

static inline int pci_device_from_OF_node(struct device_node *np,
u8 *bus, u8 *devfn)
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index b3b4df9..36ae515 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -265,13 +265,9 @@ void remove_dev_pci_data(struct pci_dev *pdev)
#endif /* CONFIG_PCI_IOV */
}

-/*
- * Traverse_func that inits the PCI fields of the device node.
- * NOTE: this *must* be done before read/write config to the device.
- */
-void *update_dn_pci_info(struct device_node *dn, void *data)
+struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
+ struct device_node *dn)
{
- struct pci_controller *phb = data;
const __be32 *type = of_get_property(dn, "ibm,pci-config-space-type", NULL);
const __be32 *regs;
struct device_node *parent;
@@ -282,7 +278,7 @@ void *update_dn_pci_info(struct device_node *dn, void *data)
return NULL;
dn->data = pdn;
pdn->node = dn;
- pdn->phb = phb;
+ pdn->phb = hose;
#ifdef CONFIG_PPC_POWERNV
pdn->pe_number = IODA_INVALID_PE;
#endif
@@ -314,8 +310,9 @@ void *update_dn_pci_info(struct device_node *dn, void *data)
if (pdn->parent)
list_add_tail(&pdn->list, &pdn->parent->child_list);

- return NULL;
+ return pdn;
}
+EXPORT_SYMBOL_GPL(pci_add_device_node_info);

/*
* Traverse a device tree stopping each PCI device in the tree.
@@ -415,6 +412,18 @@ void *traverse_pci_dn(struct pci_dn *root,
return NULL;
}

+static void *add_pdn(struct device_node *dn, void *data)
+{
+ struct pci_controller *hose = data;
+ struct pci_dn *pdn;
+
+ pdn = pci_add_device_node_info(hose, dn);
+ if (!pdn)
+ return ERR_PTR(-ENOMEM);
+
+ return NULL;
+}
+
/**
* pci_devs_phb_init_dynamic - setup pci devices under this PHB
* phb: pci-to-host bridge (top-level bridge connecting to cpu)
@@ -429,8 +438,7 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
struct pci_dn *pdn;

/* PHB nodes themselves must not match */
- update_dn_pci_info(dn, phb);
- pdn = dn->data;
+ pdn = pci_add_device_node_info(phb, dn);
if (pdn) {
pdn->devfn = pdn->busno = -1;
pdn->vendor_id = pdn->device_id = pdn->class_code = 0;
@@ -439,7 +447,7 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
}

/* Update dn->phb ptrs for new phb and children devices */
- traverse_pci_devices(dn, update_dn_pci_info, phb);
+ traverse_pci_devices(dn, add_pdn, phb);
}

/**
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 9e524c2..6c274cb 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -264,7 +264,7 @@ static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long act
pdn = parent ? PCI_DN(parent) : NULL;
if (pdn) {
/* Create pdn and EEH device */
- update_dn_pci_info(np, pdn->phb);
+ pci_add_device_node_info(pdn->phb, np);
eeh_dev_init(PCI_DN(np), pdn->phb);
}

--
2.1.0