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PCI: Add fwnode_handle to x86 pci_sysdata 

Add an fwnode_handle to the x86 struct pci_sysdata, which will be used to
locate an IRQ domain associated with a root PCI bus.

[bhelgaas: changelog]
Signed-off-by: Jake Oshins <jakeo@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Jake Oshins 2016-02-16 21:56:21 +00:00 committed by Bjorn Helgaas
parent 92e963f50f
commit 92016ba5c1
2 changed files with 19 additions and 0 deletions
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15
arch/x86/include/asm/pci.h
View File

@ -20,6 +20,9 @@ struct pci_sysdata {
#ifdef CONFIG_X86_64
void *iommu; /* IOMMU private data */
#endif
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
void *fwnode; /* IRQ domain for MSI assignment */
#endif
};
extern int pci_routeirq;
@ -32,6 +35,7 @@ extern int noioapicreroute;
static inline int pci_domain_nr(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->domain;
}
@ -41,6 +45,17 @@ static inline int pci_proc_domain(struct pci_bus *bus)
}
#endif
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->fwnode;
}
#define pci_root_bus_fwnode _pci_root_bus_fwnode
#endif
/* Can be used to override the logic in pci_scan_bus for skipping
already-configured bus numbers - to be used for buggy BIOSes
or architectures with incomplete PCI setup by the loader */

4
include/linux/pci.h
View File

@ -1515,6 +1515,10 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
#include <asm/pci.h>
#ifndef pci_root_bus_fwnode
#define pci_root_bus_fwnode(bus) NULL
#endif
/* these helpers provide future and backwards compatibility
* for accessing popular PCI BAR info */
#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)