Commit 88555b48 authored by Paul Burton's avatar Paul Burton Committed by Ralf Baechle
Browse files

MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC 



Introduce support for CONFIG_PCI_DOMAINS_GENERIC, allowing for platforms
to make use of generic PCI domains instead of the MIPS-specific
implementation. The set_pci_need_domain_info function is introduced to
abstract away the removed need_domain_info field in struct
pci_controller, and pcibios_scanbus is adjusted to use the pci_domain_nr
accessor instead of directly accessing the index field.

Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14341/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 23dac14d

arch/mips/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -2995,6 +2995,9 @@ config HT_PCI 
config PCI_DOMAINS

	bool



config PCI_DOMAINS_GENERIC

	bool



source "drivers/pci/Kconfig"



#

arch/mips/include/asm/pci.h

+20 −1
Original line number Diff line number Diff line
@@ -39,10 +39,12 @@ struct pci_controller { 
	struct resource *busn_resource;

	unsigned long busn_offset;



#ifndef CONFIG_PCI_DOMAINS_GENERIC

	unsigned int index;

	/* For compatibility with current (as of July 2003) pciutils

	   and XFree86. Eventually will be removed. */

	unsigned int need_domain_info;

#endif



	/* Optional access methods for reading/writing the bus number

	   of the PCI controller */
@@ -101,7 +103,18 @@ struct pci_dev; 
 */

#define PCI_DMA_BUS_IS_PHYS     (1)



#ifdef CONFIG_PCI_DOMAINS

#ifdef CONFIG_PCI_DOMAINS_GENERIC

static inline int pci_proc_domain(struct pci_bus *bus)

{

	return pci_domain_nr(bus);

}



static inline void set_pci_need_domain_info(struct pci_controller *hose,

					    int need_domain_info)

{

	/* nothing to do */

}

#elif defined(CONFIG_PCI_DOMAINS)

#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index



static inline int pci_proc_domain(struct pci_bus *bus)
@@ -109,6 +122,12 @@ static inline int pci_proc_domain(struct pci_bus *bus) 
	struct pci_controller *hose = bus->sysdata;

	return hose->need_domain_info;

}



static inline void set_pci_need_domain_info(struct pci_controller *hose,

					    int need_domain_info)

{

	hose->need_domain_info = need_domain_info;

}

#endif /* CONFIG_PCI_DOMAINS */



#endif /* __KERNEL__ */

arch/mips/pci/pci.c

+2 −2
Original line number Diff line number Diff line
@@ -95,8 +95,8 @@ static void pcibios_scanbus(struct pci_controller *hose) 
				&resources);

	hose->bus = bus;



	need_domain_info = need_domain_info || hose->index;

	hose->need_domain_info = need_domain_info;

	need_domain_info = need_domain_info || pci_domain_nr(bus);

	set_pci_need_domain_info(hose, need_domain_info);



	if (!bus) {

		pci_free_resource_list(&resources);

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