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 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 (8): 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/IOV: Add pci_physfn_reslock/unlock() interfaces 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 | 276 +++++++++++++++++++++++++++++----------- drivers/pci/iov.c | 1 + drivers/pci/pci.c | 7 + drivers/pci/pci.h | 40 ++++++ include/linux/pci-ats.h | 12 +- include/linux/pci.h | 5 +- 6 files changed, 260 insertions(+), 81 deletions(-) -- 2.21.0
