diff options
| author | Yu Zhao <yu.zhao@intel.com> | 2009-05-18 07:51:33 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-05-18 12:25:58 +0200 |
| commit | e277d2fc79d6abb86fafadb58dca0b9c498a9aa7 (patch) | |
| tree | 6f7a6c5bf2b300bec9fa76266eeb9089dc82e651 /drivers/pci/pci.h | |
| parent | PCI: support the ATS capability (diff) | |
| download | linux-e277d2fc79d6abb86fafadb58dca0b9c498a9aa7.tar.xz linux-e277d2fc79d6abb86fafadb58dca0b9c498a9aa7.zip | |
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.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 3c2ec64f78e9..f73bcbedf37c 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) |