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| author | Paul Burton <paul.burton@imgtec.com> | 2016-10-05 18:18:08 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-10-06 17:57:23 +0200 |
| commit | 88555b481958083b1b928a4ba5c6e3bc606ce34b (patch) | |
| tree | c7e0e62e57e7d4e013f1f38cf408654c1ee6faa7 | |
| parent | 23dac14d058fcd7cb2b4e6389139ca065855afe7 (diff) | |
| download | lwn-88555b481958083b1b928a4ba5c6e3bc606ce34b.tar.gz lwn-88555b481958083b1b928a4ba5c6e3bc606ce34b.zip | |
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: 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>
| -rw-r--r-- | arch/mips/Kconfig | 3 | ||||
| -rw-r--r-- | arch/mips/include/asm/pci.h | 21 | ||||
| -rw-r--r-- | arch/mips/pci/pci.c | 4 |
3 files changed, 25 insertions, 3 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 400cd3695ecc..7a75215aabac 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2995,6 +2995,9 @@ config HT_PCI config PCI_DOMAINS bool +config PCI_DOMAINS_GENERIC + bool + source "drivers/pci/Kconfig" # diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h index 547e113ac0fe..0564692c7d3b 100644 --- a/arch/mips/include/asm/pci.h +++ b/arch/mips/include/asm/pci.h @@ -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__ */ diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c index 644ae9696edd..5207c043c69c 100644 --- a/arch/mips/pci/pci.c +++ b/arch/mips/pci/pci.c @@ -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); |