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author | Bjorn Helgaas <bhelgaas@google.com> | 2018-04-04 13:28:26 -0500 |
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committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-04-04 13:28:26 -0500 |
commit | a4b88505ac1f77cf4fa75fa6845fe95aa43aac9e (patch) | |
tree | eef8ff80dd382d7e1b72706b60732ab2f77deaff /drivers/pci/iov.c | |
parent | 0eb6de7872d9d7bfc9598912fe6332f72943f0aa (diff) | |
parent | 619e6f340cec7c5d1449a2951dae5af0990bd0f5 (diff) | |
download | linux-stable-a4b88505ac1f77cf4fa75fa6845fe95aa43aac9e.tar.gz linux-stable-a4b88505ac1f77cf4fa75fa6845fe95aa43aac9e.tar.bz2 linux-stable-a4b88505ac1f77cf4fa75fa6845fe95aa43aac9e.zip |
Merge branch 'pci/virtualization'
- probe for device reset support during enumeration instead of runtime
(Bjorn Helgaas)
- add ACS quirk for Ampere (née APM) root ports (Feng Kan)
- add function 1 DMA alias quirk for Marvell 88SE9220 (Thomas
Vincent-Cross)
- protect device restore with device lock (Sinan Kaya)
- handle failure of FLR gracefully (Sinan Kaya)
- handle CRS (config retry status) after device resets (Sinan Kaya)
- skip various config reads for SR-IOV VFs as an optimization (KarimAllah
Ahmed)
* pci/virtualization:
PCI/IOV: Add missing prototypes for powerpc pcibios interfaces
PCI/IOV: Use VF0 cached config registers for other VFs
PCI/IOV: Skip BAR sizing for VFs
PCI/IOV: Skip INTx config reads for VFs
PCI: Wait for device to become ready after secondary bus reset
PCI: Add a return type for pci_reset_bridge_secondary_bus()
PCI: Wait for device to become ready after a power management reset
PCI: Rename pci_flr_wait() to pci_dev_wait() and make it generic
PCI: Handle FLR failure and allow other reset types
PCI: Protect restore with device lock to be consistent
PCI: Add function 1 DMA alias quirk for Marvell 88SE9220
PCI: Add ACS quirk for Ampere root ports
PCI: Remove redundant probes for device reset support
PCI: Probe for device reset support during enumeration
Conflicts:
include/linux/pci.h
Diffstat (limited to 'drivers/pci/iov.c')
-rw-r--r-- | drivers/pci/iov.c | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 538de9057c23..8adf4a64f291 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -112,6 +112,29 @@ resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno) return dev->sriov->barsz[resno - PCI_IOV_RESOURCES]; } +static void pci_read_vf_config_common(struct pci_dev *virtfn) +{ + struct pci_dev *physfn = virtfn->physfn; + + /* + * Some config registers are the same across all associated VFs. + * Read them once from VF0 so we can skip reading them from the + * other VFs. + * + * PCIe r4.0, sec 9.3.4.1, technically doesn't require all VFs to + * have the same Revision ID and Subsystem ID, but we assume they + * do. + */ + pci_read_config_dword(virtfn, PCI_CLASS_REVISION, + &physfn->sriov->class); + pci_read_config_byte(virtfn, PCI_HEADER_TYPE, + &physfn->sriov->hdr_type); + pci_read_config_word(virtfn, PCI_SUBSYSTEM_VENDOR_ID, + &physfn->sriov->subsystem_vendor); + pci_read_config_word(virtfn, PCI_SUBSYSTEM_ID, + &physfn->sriov->subsystem_device); +} + int pci_iov_add_virtfn(struct pci_dev *dev, int id) { int i; @@ -134,13 +157,17 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id) virtfn->devfn = pci_iov_virtfn_devfn(dev, id); virtfn->vendor = dev->vendor; virtfn->device = iov->vf_device; + virtfn->is_virtfn = 1; + virtfn->physfn = pci_dev_get(dev); + + if (id == 0) + pci_read_vf_config_common(virtfn); + rc = pci_setup_device(virtfn); if (rc) - goto failed0; + goto failed1; virtfn->dev.parent = dev->dev.parent; - virtfn->physfn = pci_dev_get(dev); - virtfn->is_virtfn = 1; virtfn->multifunction = 0; for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { @@ -161,10 +188,10 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id) sprintf(buf, "virtfn%u", id); rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf); if (rc) - goto failed1; + goto failed2; rc = sysfs_create_link(&virtfn->dev.kobj, &dev->dev.kobj, "physfn"); if (rc) - goto failed2; + goto failed3; kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE); @@ -172,11 +199,12 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id) return 0; -failed2: +failed3: sysfs_remove_link(&dev->dev.kobj, buf); +failed2: + pci_stop_and_remove_bus_device(virtfn); failed1: pci_dev_put(dev); - pci_stop_and_remove_bus_device(virtfn); failed0: virtfn_remove_bus(dev->bus, bus); failed: |