xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PCI: support PCIe ARI capability

Browse Source 
This patch adds support for PCI Express Alternative Routing-ID
Interpretation (ARI) capability.

The ARI capability extends the Function Number field of the PCI Express
Endpoint by reusing the Device Number which is otherwise hardwired to 0.
With ARI, an Endpoint can have up to 256 functions.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yu Zhao
2008-10-14 14:02:53 +08:00
committed by Jesse Barnes
parent 201de56eb2
commit 58c3a727cb
5 changed files with 62 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/pci/pci.h
View File

@@ -151,4 +151,16 @@ struct pci_slot_attribute {
};
#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
extern void pci_enable_ari(struct pci_dev *dev);
/**
* pci_ari_enabled - query ARI forwarding status
* @dev: the PCI device
*
* Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
*/
static inline int pci_ari_enabled(struct pci_dev *dev)
{
return dev->ari_enabled;
}
#endif /* DRIVERS_PCI_H */