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MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY 

Introduce 2 Kconfig symbols, CONFIG_PCI_DRIVERS_GENERIC &
CONFIG_PCI_DRIVERS_LEGACY, which indicate whether the system should be
built to for PCI drivers using the MIPS-specific struct pci_controller
API (hereafter "legacy" drivers) or more generic drivers using only
functionality provided by the PCI core (hereafter "generic" drivers).

The Kconfig entries are created such that platforms have to select
CONFIG_PCI_DRIVERS_GENERIC if they wish to use it - that is, the default
is CONFIG_PCI_DRIVERS_LEGACY so that existing platforms need no
modification.

The functions declared in pci.h are rearranged with those provided only
by pci-legacy.c being guarded by an #ifdef CONFIG_PCI_DRIVERS_LEGACY to
ensure they are only used in configurations where they are implemented.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14345/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2016-10-05 18:18:12 +01:00 committed by Ralf Baechle
parent f8091a8897
commit c5611df968
4 changed files with 43 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/mips/Kconfig
View File

@ -2974,7 +2974,6 @@ config PCI
bool "Support for PCI controller"
depends on HW_HAS_PCI
select PCI_DOMAINS
select NO_GENERIC_PCI_IOPORT_MAP
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
@ -2998,6 +2997,13 @@ config PCI_DOMAINS
config PCI_DOMAINS_GENERIC
bool
config PCI_DRIVERS_GENERIC
bool
config PCI_DRIVERS_LEGACY
def_bool !PCI_DRIVERS_GENERIC
select NO_GENERIC_PCI_IOPORT_MAP
source "drivers/pci/Kconfig"
#

54
arch/mips/include/asm/pci.h
View File

@ -20,6 +20,8 @@
#include <linux/list.h>
#include <linux/of.h>
#ifdef CONFIG_PCI_DRIVERS_LEGACY
/*
* Each pci channel is a top-level PCI bus seem by CPU. A machine with
* multiple PCI channels may have multiple PCI host controllers or a
@ -62,6 +64,35 @@ extern void register_pci_controller(struct pci_controller *hose);
*/
extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
/* Do platform specific device initialization at pci_enable_device() time */
extern int pcibios_plat_dev_init(struct pci_dev *dev);
extern char * (*pcibios_plat_setup)(char *str);
#ifdef CONFIG_OF
/* this function parses memory ranges from a device node */
extern void pci_load_of_ranges(struct pci_controller *hose,
struct device_node *node);
#else
static inline void pci_load_of_ranges(struct pci_controller *hose,
struct device_node *node) {}
#endif
#ifdef CONFIG_PCI_DOMAINS_GENERIC
static inline void set_pci_need_domain_info(struct pci_controller *hose,
int need_domain_info)
{
/* nothing to do */
}
#elif defined(CONFIG_PCI_DOMAINS)
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
/* Can be used to override the logic in pci_scan_bus for skipping
already-configured bus numbers - to be used for buggy BIOSes
@ -110,12 +141,6 @@ 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
@ -124,12 +149,6 @@ 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__ */
@ -143,15 +162,4 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
return channel ? 15 : 14;
}
extern char * (*pcibios_plat_setup)(char *str);
#ifdef CONFIG_OF
/* this function parses memory ranges from a device node */
extern void pci_load_of_ranges(struct pci_controller *hose,
struct device_node *node);
#else
static inline void pci_load_of_ranges(struct pci_controller *hose,
struct device_node *node) {}
#endif
#endif /* _ASM_PCI_H */

4
arch/mips/lib/iomap-pci.c
View File

@ -10,6 +10,8 @@
#include <linux/export.h>
#include <asm/io.h>
#ifdef CONFIG_PCI_DRIVERS_LEGACY
void __iomem *__pci_ioport_map(struct pci_dev *dev,
unsigned long port, unsigned int nr)
{
@ -40,6 +42,8 @@ void __iomem *__pci_ioport_map(struct pci_dev *dev,
return (void __iomem *) (ctrl->io_map_base + port);
}
#endif /* CONFIG_PCI_DRIVERS_LEGACY */
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
iounmap(addr);

2
arch/mips/pci/Makefile
View File

@ -3,7 +3,7 @@
#
obj-y += pci.o
obj-y += pci-legacy.o
obj-$(CONFIG_PCI_DRIVERS_LEGACY)+= pci-legacy.o
#
# PCI bus host bridge specific code