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authorYu Zhao <yu.zhao@intel.com>2009-05-18 13:51:33 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-05-18 11:25:58 +0100
commite277d2fc79d6abb86fafadb58dca0b9c498a9aa7 (patch)
tree6f7a6c5bf2b300bec9fa76266eeb9089dc82e651 /drivers/pci/pci.h
parent302b4215daa0a704c843da40fd2529e5757a72da (diff)
downloadop-kernel-dev-e277d2fc79d6abb86fafadb58dca0b9c498a9aa7.zip
op-kernel-dev-e277d2fc79d6abb86fafadb58dca0b9c498a9aa7.tar.gz
PCI: handle Virtual Function ATS enabling
The SR-IOV spec requires that the Smallest Translation Unit and the Invalidate Queue Depth fields in the Virtual Function ATS capability are hardwired to 0. If a function is a Virtual Function, then and set its Physical Function's STU before enabling the ATS. Signed-off-by: Yu Zhao <yu.zhao@intel.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci/pci.h')
-rw-r--r--drivers/pci/pci.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 3c2ec64..f73bcbe 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -234,6 +234,8 @@ struct pci_ats {
int pos; /* capability position */
int stu; /* Smallest Translation Unit */
int qdep; /* Invalidate Queue Depth */
+ int ref_cnt; /* Physical Function reference count */
+ int is_enabled:1; /* Enable bit is set */
};
#ifdef CONFIG_PCI_IOV
@@ -255,7 +257,7 @@ extern int pci_ats_queue_depth(struct pci_dev *dev);
*/
static inline int pci_ats_enabled(struct pci_dev *dev)
{
- return !!dev->ats;
+ return dev->ats && dev->ats->is_enabled;
}
#else
static inline int pci_iov_init(struct pci_dev *dev)
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