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Diffstat (limited to 'arch/powerpc/platforms/powernv/pci-ioda.c')
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 57f9e55f4352..749055553064 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1002,9 +1002,12 @@ static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset)
}
/*
- * After doing so, there would be a "hole" in the /proc/iomem when
- * offset is a positive value. It looks like the device return some
- * mmio back to the system, which actually no one could use it.
+ * Since M64 BAR shares segments among all possible 256 PEs,
+ * we have to shift the beginning of PF IOV BAR to make it start from
+ * the segment which belongs to the PE number assigned to the first VF.
+ * This creates a "hole" in the /proc/iomem which could be used for
+ * allocating other resources so we reserve this area below and
+ * release when IOV is released.
*/
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &dev->resource[i + PCI_IOV_RESOURCES];
@@ -1018,7 +1021,22 @@ static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset)
dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (%sabling %d VFs shifted by %d)\n",
i, &res2, res, (offset > 0) ? "En" : "Dis",
num_vfs, offset);
+
+ if (offset < 0) {
+ devm_release_resource(&dev->dev, &pdn->holes[i]);
+ memset(&pdn->holes[i], 0, sizeof(pdn->holes[i]));
+ }
+
pci_update_resource(dev, i + PCI_IOV_RESOURCES);
+
+ if (offset > 0) {
+ pdn->holes[i].start = res2.start;
+ pdn->holes[i].end = res2.start + size * offset - 1;
+ pdn->holes[i].flags = IORESOURCE_BUS;
+ pdn->holes[i].name = "pnv_iov_reserved";
+ devm_request_resource(&dev->dev, res->parent,
+ &pdn->holes[i]);
+ }
}
return 0;
}
@@ -2779,7 +2797,7 @@ static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS))
return -EINVAL;
- if ((window_size > memory_hotplug_max()) || !is_power_of_2(window_size))
+ if (!is_power_of_2(window_size))
return -EINVAL;
/* Adjust direct table size from window_size and levels */
@@ -3293,8 +3311,7 @@ static void pnv_pci_ioda_fixup(void)
pnv_pci_ioda_create_dbgfs();
#ifdef CONFIG_EEH
- eeh_init();
- eeh_addr_cache_build();
+ pnv_eeh_post_init();
#endif
}