Commit 0ed2c722 authored by Grant Likely's avatar Grant Likely Committed by Benjamin Herrenschmidt
Browse files

powerpc/pci: Merge ppc32 and ppc64 versions of phb_scan() 



The two versions are doing almost exactly the same thing.  No need to
maintain them as separate files.  This patch also has the side effect
of making the PCI device tree scanning code available to 32 bit powerpc
machines, but no board ports actually make use of this feature at this
point.

Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarKumar Gala <galak@kernel.crashing.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent c5b20d39

arch/powerpc/include/asm/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -233,6 +233,8 @@ extern void pci_resource_to_user(const struct pci_dev *dev, int bar, 


extern void pcibios_setup_bus_devices(struct pci_bus *bus);

extern void pcibios_setup_bus_self(struct pci_bus *bus);

extern void pcibios_setup_phb_io_space(struct pci_controller *hose);

extern void pcibios_scan_phb(struct pci_controller *hose, void *sysdata);



#endif	/* __KERNEL__ */

#endif /* __ASM_POWERPC_PCI_H */

arch/powerpc/include/asm/ppc-pci.h

+0 −1
Original line number Diff line number Diff line
@@ -39,7 +39,6 @@ void *traverse_pci_devices(struct device_node *start, traverse_func pre, 


extern void pci_devs_phb_init(void);

extern void pci_devs_phb_init_dynamic(struct pci_controller *phb);

extern void scan_phb(struct pci_controller *hose);



/* From rtas_pci.h */

extern void init_pci_config_tokens (void);

arch/powerpc/kernel/of_platform.c

+1 −1
Original line number Diff line number Diff line
@@ -276,7 +276,7 @@ static int __devinit of_pci_phb_probe(struct of_device *dev, 
#endif /* CONFIG_EEH */



	/* Scan the bus */

	scan_phb(phb);

	pcibios_scan_phb(phb, dev->node);

	if (phb->bus == NULL)

		return -ENXIO;

arch/powerpc/kernel/pci-common.c

+49 −0
Original line number Diff line number Diff line
@@ -1688,3 +1688,52 @@ int early_find_capability(struct pci_controller *hose, int bus, int devfn, 
{

	return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);

}



/**

 * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus

 * @hose: Pointer to the PCI host controller instance structure

 * @sysdata: value to use for sysdata pointer.  ppc32 and ppc64 differ here

 *

 * Note: the 'data' pointer is a temporary measure.  As 32 and 64 bit

 * pci code gets merged, this parameter should become unnecessary because

 * both will use the same value.

 */

void __devinit pcibios_scan_phb(struct pci_controller *hose, void *sysdata)

{

	struct pci_bus *bus;

	struct device_node *node = hose->dn;

	int mode;



	pr_debug("PCI: Scanning PHB %s\n",

		 node ? node->full_name : "<NO NAME>");



	/* Create an empty bus for the toplevel */

	bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops,

			     sysdata);

	if (bus == NULL) {

		pr_err("Failed to create bus for PCI domain %04x\n",

			hose->global_number);

		return;

	}

	bus->secondary = hose->first_busno;

	hose->bus = bus;



	/* Get some IO space for the new PHB */

	pcibios_setup_phb_io_space(hose);



	/* Wire up PHB bus resources */

	pcibios_setup_phb_resources(hose);



	/* Get probe mode and perform scan */

	mode = PCI_PROBE_NORMAL;

	if (node && ppc_md.pci_probe_mode)

		mode = ppc_md.pci_probe_mode(bus);

	pr_debug("    probe mode: %d\n", mode);

	if (mode == PCI_PROBE_DEVTREE) {

		bus->subordinate = hose->last_busno;

		of_scan_bus(node, bus);

	}



	if (mode == PCI_PROBE_NORMAL)

		hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);

}

arch/powerpc/kernel/pci_32.c

+2 −23
Original line number Diff line number Diff line
@@ -354,36 +354,15 @@ pci_create_OF_bus_map(void) 
	}

}



static void __devinit pcibios_scan_phb(struct pci_controller *hose)

void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose)

{

	struct pci_bus *bus;

	struct device_node *node = hose->dn;

	unsigned long io_offset;

	struct resource *res = &hose->io_resource;



	pr_debug("PCI: Scanning PHB %s\n",

		 node ? node->full_name : "<NO NAME>");



	/* Create an empty bus for the toplevel */

	bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, hose);

	if (bus == NULL) {

		printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",

		       hose->global_number);

		return;

	}

	bus->secondary = hose->first_busno;

	hose->bus = bus;



	/* Fixup IO space offset */

	io_offset = (unsigned long)hose->io_base_virt - isa_io_base;

	res->start = (res->start + io_offset) & 0xffffffffu;

	res->end = (res->end + io_offset) & 0xffffffffu;



	/* Wire up PHB bus resources */

	pcibios_setup_phb_resources(hose);



	/* Scan children */

	hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);

}



static int __init pcibios_init(void)
@@ -401,7 +380,7 @@ static int __init pcibios_init(void) 
		if (pci_assign_all_buses)

			hose->first_busno = next_busno;

		hose->last_busno = 0xff;

		pcibios_scan_phb(hose);

		pcibios_scan_phb(hose, hose);

		pci_bus_add_devices(hose->bus);

		if (pci_assign_all_buses || next_busno <= hose->last_busno)

			next_busno = hose->last_busno + pcibios_assign_bus_offset;

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