diff options
| -rw-r--r-- | arch/s390/include/asm/pci.h | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/pci_clp.h | 3 | ||||
| -rw-r--r-- | arch/s390/pci/pci_bus.c | 72 | ||||
| -rw-r--r-- | arch/s390/pci/pci_clp.c | 1 | ||||
| -rw-r--r-- | drivers/pci/iov.c | 3 |
5 files changed, 75 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index c1558cf071b8..99b92c3e46b0 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -131,7 +131,8 @@ struct zpci_dev { u8 port; u8 rid_available : 1; u8 has_hp_slot : 1; - u8 reserved : 6; + u8 is_physfn : 1; + u8 reserved : 5; unsigned int devfn; /* DEVFN part of the RID*/ struct mutex lock; diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index 896ee41e23e3..eb51272dd2cc 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -95,7 +95,8 @@ struct clp_rsp_query_pci { u16 vfn; /* virtual fn number */ u16 : 3; u16 rid_avail : 1; - u16 : 2; + u16 is_physfn : 1; + u16 reserved1 : 1; u16 mio_addr_avail : 1; u16 util_str_avail : 1; /* utility string available? */ u16 pfgid : 8; /* pci function group id */ diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c index ada571d1c630..642a99384688 100644 --- a/arch/s390/pci/pci_bus.c +++ b/arch/s390/pci/pci_bus.c @@ -126,6 +126,64 @@ static struct zpci_bus *zpci_bus_alloc(int pchid) return zbus; } +#ifdef CONFIG_PCI_IOV +static int zpci_bus_link_virtfn(struct pci_dev *pdev, + struct pci_dev *virtfn, int vfid) +{ + int rc; + + virtfn->physfn = pci_dev_get(pdev); + rc = pci_iov_sysfs_link(pdev, virtfn, vfid); + if (rc) { + pci_dev_put(pdev); + virtfn->physfn = NULL; + return rc; + } + return 0; +} + +static int zpci_bus_setup_virtfn(struct zpci_bus *zbus, + struct pci_dev *virtfn, int vfn) +{ + int i, cand_devfn; + struct zpci_dev *zdev; + struct pci_dev *pdev; + int vfid = vfn - 1; /* Linux' vfid's start at 0 vfn at 1*/ + int rc = 0; + + virtfn->is_virtfn = 1; + virtfn->multifunction = 0; + WARN_ON(vfid < 0); + /* If the parent PF for the given VF is also configured in the + * instance, it must be on the same zbus. + * We can then identify the parent PF by checking what + * devfn the VF would have if it belonged to that PF using the PF's + * stride and offset. Only if this candidate devfn matches the + * actual devfn will we link both functions. + */ + for (i = 0; i < ZPCI_FUNCTIONS_PER_BUS; i++) { + zdev = zbus->function[i]; + if (zdev && zdev->is_physfn) { + pdev = pci_get_slot(zbus->bus, zdev->devfn); + cand_devfn = pci_iov_virtfn_devfn(pdev, vfid); + if (cand_devfn == virtfn->devfn) { + rc = zpci_bus_link_virtfn(pdev, virtfn, vfid); + break; + } + } + } + return rc; +} +#else +static inline int zpci_bus_setup_virtfn(struct zpci_bus *zbus, + struct pci_dev *virtfn, int vfn) +{ + virtfn->is_virtfn = 1; + virtfn->multifunction = 0; + return 0; +} +#endif + static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev) { struct pci_bus *bus; @@ -156,10 +214,20 @@ static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev) } pdev = pci_scan_single_device(bus, zdev->devfn); - if (pdev) + if (pdev) { + if (!zdev->is_physfn) { + rc = zpci_bus_setup_virtfn(zbus, pdev, zdev->vfn); + if (rc) + goto failed_with_pdev; + } pci_bus_add_device(pdev); - + } return 0; + +failed_with_pdev: + pci_stop_and_remove_bus_device(pdev); + pci_dev_put(pdev); + return rc; } static void zpci_bus_add_devices(struct zpci_bus *zbus) diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 9b318824a134..d7bd3c287cf7 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -159,6 +159,7 @@ static int clp_store_query_pci_fn(struct zpci_dev *zdev, zdev->uid = response->uid; zdev->fmb_length = sizeof(u32) * response->fmb_len; zdev->rid_available = response->rid_avail; + zdev->is_physfn = response->is_physfn; if (!s390_pci_no_rid && zdev->rid_available) zdev->devfn = response->rid & ZPCI_RID_MASK_DEVFN; diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index ee6fbe688498..b37e08c4f9d1 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -571,9 +571,6 @@ static void sriov_del_vfs(struct pci_dev *dev) struct pci_sriov *iov = dev->sriov; int i; - if (dev->no_vf_scan) - return; - for (i = 0; i < iov->num_VFs; i++) pci_iov_remove_virtfn(dev, i); } |