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| author | Kelly Zytaruk <kelly.zytaruk@amd.com> | 2016-02-09 13:08:58 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-02-29 11:22:33 -0600 |
| commit | 0a3d00b33b4ed873cbead8c241bd58b456d92d36 (patch) | |
| tree | bc3035504273d1b426366da261bab585298e248a /drivers/pci/iov.c | |
| parent | b404bcfbf035413dcce539c8ba2c9986d220d8ed (diff) | |
| download | lwn-0a3d00b33b4ed873cbead8c241bd58b456d92d36.tar.gz lwn-0a3d00b33b4ed873cbead8c241bd58b456d92d36.zip | |
PCI: Support SR-IOV on any function type
Previously, we only supported SR-IOV on PCI Express Endpoints and Root
Complex Integrated Endpoints. This restriction has been present since
d1b054da8f59 ("PCI: initialize and release SR-IOV capability") added SR-IOV
support, but the spec does not require it. In fact, the SR-IOV spec r1.1,
sec 3.3, says the SR-IOV extended capability may be present for any Type 0
function.
Remove the function type test, so we can support SR-IOV on any function.
Some AMD GPUs have display outputs, use the VGA class code, are Legacy
Endpoints, and support SR-IOV. This change allows Linux to enable SR-IOV
on these devices.
[bhelgaas: changelog]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=112221
Signed-off-by: Kelly Zytaruk <kelly.zytaruk@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/iov.c')
| -rw-r--r-- | drivers/pci/iov.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 31f31d460fc9..fe4bd0aa91a6 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -387,10 +387,6 @@ static int sriov_init(struct pci_dev *dev, int pos) struct resource *res; struct pci_dev *pdev; - if (pci_pcie_type(dev) != PCI_EXP_TYPE_RC_END && - pci_pcie_type(dev) != PCI_EXP_TYPE_ENDPOINT) - return -ENODEV; - pci_read_config_word(dev, pos + PCI_SRIOV_CTRL, &ctrl); if (ctrl & PCI_SRIOV_CTRL_VFE) { pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, 0); |