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authorWei Yang <weiyang@linux.vnet.ibm.com>2015-03-25 11:23:48 +0300
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2015-03-31 05:02:36 +0300
commitb07579c0924eee1543eb6cd2c19544d15a4b5236 (patch)
treecb0f9cd7ec419b1abb41d4fd72d08528a1cc99d3 /drivers/pci
parent4449f079722c86d2f6925da039835acdd8e973a8 (diff)
downloadlinux-b07579c0924eee1543eb6cd2c19544d15a4b5236.tar.xz
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 <weiyang@linux.vnet.ibm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/iov.c28
1 files changed, 16 insertions, 12 deletions
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);