[SeaBIOS] [PATCH V2 2/2] fw/pci: map memory and IO regions for multiple pci root buses

Marcel Apfelbaum marcel at redhat.com
Mon Feb 16 10:31:03 CET 2015


For resource sizing and mapping purposes treat devices on extra root
buses as if they are on the default root bus (bus 0).

Signed-off-by: Marcel Apfelbaum <marcel at redhat.com>
---
 src/fw/pciinit.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
index a5f6505..c399698 100644
--- a/src/fw/pciinit.c
+++ b/src/fw/pciinit.c
@@ -58,6 +58,7 @@ struct pci_region {
 struct pci_bus {
     struct pci_region r[PCI_REGION_TYPE_COUNT];
     struct pci_device *bus_dev;
+    int res_on_default_bus;
 };
 
 static u32 pci_bar(struct pci_device *pci, int region_num)
@@ -686,6 +687,14 @@ static int pci_bios_check_devices(struct pci_bus *busses)
             busses[pci->secondary_bus].bus_dev = pci;
 
         struct pci_bus *bus = &busses[pci_bdf_to_bus(pci->bdf)];
+        if (!bus->bus_dev && pci_bdf_to_bus(pci->bdf)) {
+            bus->res_on_default_bus = 1;
+            /*
+             * Treat devices on extra root buses as if they
+             * were on the default root bus (bus 0)
+             */
+            bus = &busses[0];
+        }
         int i;
         for (i = 0; i < PCI_NUM_REGIONS; i++) {
             if ((pci->class == PCI_CLASS_BRIDGE_PCI) &&
@@ -716,6 +725,8 @@ static int pci_bios_check_devices(struct pci_bus *busses)
         if (!s->bus_dev)
             continue;
         struct pci_bus *parent = &busses[pci_bdf_to_bus(s->bus_dev->bdf)];
+        if (parent->res_on_default_bus)
+            parent = &busses[0];
         int type;
         int hotplug_support = pci_bus_hotplug_support(s);
         for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) {
-- 
2.1.0




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