From b07579c0924eee1543eb6cd2c19544d15a4b5236 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Wed, 25 Mar 2015 16:23:48 +0800 Subject: PCI: Export pci_iov_virtfn_bus() and pci_iov_virtfn_devfn() On PowerNV, some resource reservation is needed for SR-IOV VFs that don't exist at the bootup stage. To do the match between resources and VFs, the code need to get the VF's BDF in advance. Rename virtfn_bus() and virtfn_devfn() to pci_iov_virtfn_bus() and pci_iov_virtfn_devfn() and export them. [bhelgaas: changelog, make "busnr" int] Signed-off-by: Wei Yang Acked-by: Bjorn Helgaas Signed-off-by: Benjamin Herrenschmidt --- drivers/pci/iov.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) (limited to 'drivers/pci/iov.c') diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 2ae921f84bd3..5643a1011e23 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -19,16 +19,20 @@ #define VIRTFN_ID_LEN 16 -static inline u8 virtfn_bus(struct pci_dev *dev, int id) +int pci_iov_virtfn_bus(struct pci_dev *dev, int vf_id) { + if (!dev->is_physfn) + return -EINVAL; return dev->bus->number + ((dev->devfn + dev->sriov->offset + - dev->sriov->stride * id) >> 8); + dev->sriov->stride * vf_id) >> 8); } -static inline u8 virtfn_devfn(struct pci_dev *dev, int id) +int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id) { + if (!dev->is_physfn) + return -EINVAL; return (dev->devfn + dev->sriov->offset + - dev->sriov->stride * id) & 0xff; + dev->sriov->stride * vf_id) & 0xff; } /* @@ -58,11 +62,11 @@ static inline u8 virtfn_max_buses(struct pci_dev *dev) struct pci_sriov *iov = dev->sriov; int nr_virtfn; u8 max = 0; - u8 busnr; + int busnr; for (nr_virtfn = 1; nr_virtfn <= iov->total_VFs; nr_virtfn++) { pci_iov_set_numvfs(dev, nr_virtfn); - busnr = virtfn_bus(dev, nr_virtfn - 1); + busnr = pci_iov_virtfn_bus(dev, nr_virtfn - 1); if (busnr > max) max = busnr; } @@ -116,7 +120,7 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) struct pci_bus *bus; mutex_lock(&iov->dev->sriov->lock); - bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id)); + bus = virtfn_add_bus(dev->bus, pci_iov_virtfn_bus(dev, id)); if (!bus) goto failed; @@ -124,7 +128,7 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) if (!virtfn) goto failed0; - virtfn->devfn = virtfn_devfn(dev, id); + virtfn->devfn = pci_iov_virtfn_devfn(dev, id); virtfn->vendor = dev->vendor; pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device); pci_setup_device(virtfn); @@ -186,8 +190,8 @@ static void virtfn_remove(struct pci_dev *dev, int id, int reset) struct pci_sriov *iov = dev->sriov; virtfn = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus), - virtfn_bus(dev, id), - virtfn_devfn(dev, id)); + pci_iov_virtfn_bus(dev, id), + pci_iov_virtfn_devfn(dev, id)); if (!virtfn) return; @@ -226,7 +230,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) struct pci_dev *pdev; struct pci_sriov *iov = dev->sriov; int bars = 0; - u8 bus; + int bus; if (!nr_virtfn) return 0; @@ -263,7 +267,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) iov->offset = offset; iov->stride = stride; - bus = virtfn_bus(dev, nr_virtfn - 1); + bus = pci_iov_virtfn_bus(dev, nr_virtfn - 1); if (bus > dev->bus->busn_res.end) { dev_err(&dev->dev, "can't enable %d VFs (bus %02x out of range of %pR)\n", nr_virtfn, bus, &dev->bus->busn_res); -- cgit v1.2.3