diff options
| author | David Daney <david.daney@cavium.com> | 2015-10-30 01:35:40 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-10-30 01:35:40 +0300 |
| commit | 111839917fccf4f74d50ad937321acc6a07eb9c3 (patch) | |
| tree | 7536a1ef0d1fee3a9100ec75ee370de283d4c9d6 | |
| parent | 938174e59f83354251a75a2b90171e0ffdf6f1d7 (diff) | |
| download | linux-111839917fccf4f74d50ad937321acc6a07eb9c3.tar.xz | |
PCI: Handle Enhanced Allocation capability for SR-IOV devices
SR-IOV BARs can be specified via EA entries. Extend the EA parser to
extract the SRIOV BAR resources, and modify sriov_init() to use resources
previously obtained via EA.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Sean O. Stalley <sean.stalley@intel.com>
| -rw-r--r-- | drivers/pci/iov.c | 11 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 6 |
2 files changed, 15 insertions, 2 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index ee0ebff103a4..c789e68df358 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -436,8 +436,15 @@ found: nres = 0; for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { res = &dev->resource[i + PCI_IOV_RESOURCES]; - bar64 = __pci_read_base(dev, pci_bar_unknown, res, - pos + PCI_SRIOV_BAR + i * 4); + /* + * If it is already FIXED, don't change it, something + * (perhaps EA or header fixups) wants it this way. + */ + if (res->flags & IORESOURCE_PCI_FIXED) + bar64 = (res->flags & IORESOURCE_MEM_64) ? 1 : 0; + else + bar64 = __pci_read_base(dev, pci_bar_unknown, res, + pos + PCI_SRIOV_BAR + i * 4); if (!res->flags) continue; if (resource_size(res) & (PAGE_SIZE - 1)) { diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8d796c02ee90..364f98b30130 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2176,6 +2176,12 @@ static struct resource *pci_ea_get_resource(struct pci_dev *dev, u8 bei, { if (bei <= PCI_EA_BEI_BAR5 && prop <= PCI_EA_P_IO) return &dev->resource[bei]; +#ifdef CONFIG_PCI_IOV + else if (bei >= PCI_EA_BEI_VF_BAR0 && bei <= PCI_EA_BEI_VF_BAR5 && + (prop == PCI_EA_P_VF_MEM || prop == PCI_EA_P_VF_MEM_PREFETCH)) + return &dev->resource[PCI_IOV_RESOURCES + + bei - PCI_EA_BEI_VF_BAR0]; +#endif else if (bei == PCI_EA_BEI_ROM) return &dev->resource[PCI_ROM_RESOURCE]; else |