From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> Current implementation of ATS, PASID, PRI does not handle VF dependencies correctly. Following patches addresses this issue. Changes since v6: * Removed locking interfaces used in v6. * Made necessary changes to PRI/PASID enable/disable calls to allow register changes only for PF. Changes since v5: * Created new patches for PRI/PASID capability caching. * Removed individual locks (pri_lock, pasid_lock) and added common resource lock to synchronize PRI/PASID updates between PF/VF. * Addressed comments from Bjorn Helgaas. Changes since v4: * Defined empty functions for pci_pri_init() and pci_pasid_init() for cases where CONFIG_PCI_PRI and CONFIG_PCI_PASID are not enabled. Changes since v3: * Fixed critical path (lock context) in pci_restore_*_state functions. Changes since v2: * Added locking mechanism to synchronize accessing PF registers in VF. * Removed spec compliance checks in patches. * Addressed comments from Bjorn Helgaas. Changes since v1: * Added more details about the patches in commit log. * Removed bulk spec check patch. * Addressed comments from Bjorn Helgaas. Kuppuswamy Sathyanarayanan (7): PCI/ATS: Fix pci_prg_resp_pasid_required() dependency issues PCI/ATS: Cache PRI capability check result PCI/ATS: Cache PASID capability check result PCI/ATS: Add PRI support for PCIe VF devices PCI/ATS: Add PASID support for PCIe VF devices PCI/ATS: Disable PF/VF ATS service independently PCI: Skip Enhanced Allocation (EA) initialization for VF device drivers/pci/ats.c | 202 ++++++++++++++++++++++++++++------------ drivers/pci/pci.c | 7 ++ include/linux/pci-ats.h | 12 ++- include/linux/pci.h | 3 +- 4 files changed, 159 insertions(+), 65 deletions(-) -- 2.21.0
