[PATCH v2 10/49] PCI: Treat ROM resource as optional during realloc

Yinghai Lu
2015-07-14T23:02:38Z

So will try to allocate them together with must-have ones, if can
not assign them, could go with must-have one only, and just skip
ROM resources.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/setup-bus.c | 37 ++++++++++++++++++++-----------------
1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 292f2a5..3abf249 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -372,18 +372,10 @@ static void assign_requested_resources_sorted(struct list_head *head,
idx = res - &dev_res->dev->resource[0];
if (resource_size(res) &&
pci_assign_resource(dev_res->dev, idx)) {
- if (fail_head) {
- /*
- * if the failed res is for ROM BAR, and it will
- * be enabled later, don't add it to the list
- */
- if (!((idx == PCI_ROM_RESOURCE) &&
- (!(res->flags & IORESOURCE_ROM_ENABLE))))
- add_to_list(fail_head,
- dev_res->dev, res,
- 0 /* don't care */,
- 0 /* don't care */);
- }
+ if (fail_head)
+ add_to_list(fail_head, dev_res->dev, res,
+ 0 /* don't care */,
+ 0 /* don't care */);
reset_resource(res);
}
}
@@ -1143,6 +1135,19 @@ out:
return good_align;
}

+static inline bool is_optional(int i)
+{
+
+ if (i == PCI_ROM_RESOURCE)
+ return true;
+
+#ifdef CONFIG_PCI_IOV
+ if (i >= PCI_IOV_RESOURCES && i <= PCI_IOV_RESOURCE_END)
+ return true;
+#endif
+
+ return false;
+}
/**
* pbus_size_mem() - size the memory window of a given bus
*
@@ -1199,10 +1204,8 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,

r_size = resource_size(r);
align = pci_resource_alignment(dev, r);
-#ifdef CONFIG_PCI_IOV
- /* put SRIOV requested res to the optional list */
- if (realloc_head && i >= PCI_IOV_RESOURCES &&
- i <= PCI_IOV_RESOURCE_END) {
+ /* put SRIOV/ROM res to realloc list */
+ if (realloc_head && is_optional(i)) {
add_to_align_test_list(&align_test_add_list,
align, r_size);
r->end = r->start - 1;
@@ -1212,7 +1215,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
max_add_align = align;
continue;
}
-#endif
+
if (align > (1ULL<<37)) { /*128 Gb*/
dev_warn(&dev->dev, "disabling BAR %d: %pR (bad alignment %#llx)\n",
i, r, (unsigned long long) align);
--
1.8.4.5