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MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC

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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: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14341/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2016-10-05 18:18:08 +01:00 committed by Ralf Baechle
parent 23dac14d05
commit 88555b4819
3 changed files with 25 additions and 3 deletions
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3
arch/mips/Kconfig
View File

@ -2995,6 +2995,9 @@ config HT_PCI
config PCI_DOMAINS
bool
config PCI_DOMAINS_GENERIC
bool
source "drivers/pci/Kconfig"
#

21
arch/mips/include/asm/pci.h
View File

@ -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__ */

4
arch/mips/pci/pci.c
View File

@ -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);