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authorCQ Tang <cq.tang@intel.com>2017-05-30 19:25:49 +0300
committerBjorn Helgaas <bhelgaas@google.com>2017-05-30 23:40:50 +0300
commit4ebeb1ec56d4c54a56b6f43c2603d9a4688c83ba (patch)
tree8d5adc040423e0c4bd7374a4f4679c8e238f337b /include/linux/pci-ats.h
parenta4f4fa681add289ebfec6d776376ad7a2ffda669 (diff)
downloadlinux-4ebeb1ec56d4c54a56b6f43c2603d9a4688c83ba.tar.xz
PCI: Restore PRI and PASID state after Function-Level Reset
After a Function-Level Reset, PCI states need to be restored. Save PASID features and PRI reqs cached. [bhelgaas: search for capability only if PRI/PASID were enabled] Signed-off-by: CQ Tang <cq.tang@intel.com> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Jean-Phillipe Brucker <jean-philippe.brucker@arm.com> Cc: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'include/linux/pci-ats.h')
-rw-r--r--include/linux/pci-ats.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
index 57e0b8250947..782fb8e0755f 100644
--- a/include/linux/pci-ats.h
+++ b/include/linux/pci-ats.h
@@ -7,6 +7,7 @@
int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
void pci_disable_pri(struct pci_dev *pdev);
+void pci_restore_pri_state(struct pci_dev *pdev);
int pci_reset_pri(struct pci_dev *pdev);
#else /* CONFIG_PCI_PRI */
@@ -20,6 +21,10 @@ static inline void pci_disable_pri(struct pci_dev *pdev)
{
}
+static inline void pci_restore_pri_state(struct pci_dev *pdev)
+{
+}
+
static inline int pci_reset_pri(struct pci_dev *pdev)
{
return -ENODEV;
@@ -31,6 +36,7 @@ static inline int pci_reset_pri(struct pci_dev *pdev)
int pci_enable_pasid(struct pci_dev *pdev, int features);
void pci_disable_pasid(struct pci_dev *pdev);
+void pci_restore_pasid_state(struct pci_dev *pdev);
int pci_pasid_features(struct pci_dev *pdev);
int pci_max_pasids(struct pci_dev *pdev);
@@ -45,6 +51,10 @@ static inline void pci_disable_pasid(struct pci_dev *pdev)
{
}
+static inline void pci_restore_pasid_state(struct pci_dev *pdev)
+{
+}
+
static inline int pci_pasid_features(struct pci_dev *pdev)
{
return -EINVAL;