M64 aperture size is limited on PHB3. When the IOV BAR is too big, this will
exceed the limitation and failed to be assigned.
This patch introduce a different expanding based on the IOV BAR size:
IOV BAR size is smaller than 64M, expand to total_pe.
IOV BAR size is bigger than 64M, roundup power2.
Signed-off-by: Wei Yang <weiy...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/pci-bridge.h | 2 ++
arch/powerpc/platforms/powernv/pci-ioda.c | 28 ++++++++++++++++++++++++++--
2 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/pci-bridge.h
b/arch/powerpc/include/asm/pci-bridge.h
index 72f0af5..36b88e4 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -171,6 +171,8 @@ struct pci_dn {
#ifdef CONFIG_PCI_IOV
u16 vfs;
int offset;
+#define M64_PER_IOV 4
+ int m64_per_iov;
int m64_wins[PCI_SRIOV_NUM_BARS];
#endif /* CONFIG_PCI_IOV */
#endif
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index fb2c2c6..98fc163 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1756,6 +1756,7 @@ static void pnv_pci_ioda_fixup_iov_resources(struct
pci_dev *pdev)
int i;
resource_size_t size;
struct pci_dn *pdn;
+ int mul, total_vfs;
if (!pdev->is_physfn || pdev->is_added)
return;
@@ -1775,6 +1776,10 @@ static void pnv_pci_ioda_fixup_iov_resources(struct
pci_dev *pdev)
pdn = pci_get_pdn(pdev);
pdn->vfs = 0;
+ total_vfs = pci_sriov_get_totalvfs(pdev);
+ pdn->m64_per_iov = 1;
+ mul = phb->ioda.total_pe;
+
for (i = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++) {
res = &pdev->resource[i];
if (!res->flags || res->parent)
@@ -1783,13 +1788,32 @@ static void pnv_pci_ioda_fixup_iov_resources(struct
pci_dev *pdev)
if (!is_mem_pref_64_type(res->flags))
continue;
+ size = pci_sriov_resource_size(pdev, i);
+
+ /* bigger than 64M */
+ if (size > (1 << 26)) {
+ dev_info(&pdev->dev, "PowerNV: VF BAR[%d] size "
+ "is bigger than 64M, roundup power2\n",
i);
+ pdn->m64_per_iov = M64_PER_IOV;
+ mul = __roundup_pow_of_two(total_vfs);
+ break;
+ }
+ }
+
+ for (i = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++) {
+ res = &pdev->resource[i];
+ if (!res->flags || res->parent)
+ continue;
+ if (!is_mem_pref_64_type(res->flags))
+ continue;
+
dev_info(&pdev->dev, "PowerNV: Fixing VF BAR[%d] %pR to\n",
i, res);
size = pci_sriov_resource_size(pdev, i);
- res->end = res->start + size * phb->ioda.total_pe - 1;
+ res->end = res->start + size * mul - 1;
dev_info(&pdev->dev, " %pR\n", res);
}
- pdn->vfs = phb->ioda.total_pe;
+ pdn->vfs = mul;
}
static void pnv_pci_ioda_fixup_sriov(struct pci_bus *bus)
--
1.7.9.5
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