[POWERPC] fix iSeries PCI resource management

The way iSeries manages PCI IO and Memory resources is a bit strange
and is based on overriding the content of those resources with home
cooked ones afterward.

This changes it a bit to better integrate with the new resource handling
so that the "virtual" tokens that iSeries replaces resources with are
done from the proper per-device fixup hook, and bridge resources are
set to enclose that token space.  This fixes various things such as
the output of /proc/iomem & ioports, among others.  This also fixes up
various boot messages as well.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 31 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index d804c8d0be0..f706b7e83d7 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -190,6 +190,20 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
 	struct of_irq oirq;
 	unsigned int virq;
 
+	/* The current device-tree that iSeries generates from the HV
+	 * PCI informations doesn't contain proper interrupt routing,
+	 * and all the fallback would do is print out crap, so we
+	 * don't attempt to resolve the interrupts here at all, some
+	 * iSeries specific fixup does it.
+	 *
+	 * In the long run, we will hopefully fix the generated device-tree
+	 * instead.
+	 */
+#ifdef CONFIG_PPC_ISERIES
+	if (firmware_has_feature(FW_FEATURE_ISERIES))
+		return -1;
+#endif
+
 	DBG("Try to map irq for %s...\n", pci_name(pci_dev));
 
 #ifdef DEBUG
@@ -946,7 +960,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 			    || res->start > res->end)
 				continue;
 			if (bus->parent == NULL)
-				pr = (res->flags & IORESOURCE_IO)?
+				pr = (res->flags & IORESOURCE_IO) ?
 					&ioport_resource : &iomem_resource;
 			else {
 				/* Don't bother with non-root busses when
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 794359d8686..2ec040b314d 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -359,7 +359,7 @@ void __devinit scan_phb(struct pci_controller *hose)
 	int i, mode;
 	struct resource *res;
 
-	DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
+	DBG("PCI: Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
 
 	/* Create an empty bus for the toplevel */
 	bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, node);
@@ -375,9 +375,22 @@ void __devinit scan_phb(struct pci_controller *hose)
 	pcibios_map_io_space(bus);
 
 	/* Wire up PHB bus resources */
-	bus->resource[0] = res = &hose->io_resource;
-	for (i = 0; i < 3; ++i)
+	if (hose->io_resource.flags) {
+		DBG("PCI: PHB IO resource    = %016lx-%016lx [%lx]\n",
+		    hose->io_resource.start, hose->io_resource.end,
+		    hose->io_resource.flags);
+		bus->resource[0] = res = &hose->io_resource;
+	}
+	for (i = 0; i < 3; ++i) {
+		DBG("PCI: PHB MEM resource %d = %016lx-%016lx [%lx]\n", i,
+		    hose->mem_resources[i].start,
+		    hose->mem_resources[i].end,
+		    hose->mem_resources[i].flags);
 		bus->resource[i+1] = &hose->mem_resources[i];
+	}
+	DBG("PCI: PHB MEM offset     = %016lx\n", hose->pci_mem_offset);
+	DBG("PCI: PHB IO  offset     = %08lx\n",
+	    (unsigned long)hose->io_base_virt - _IO_BASE);
 
 	/* Get probe mode and perform scan */
 	mode = PCI_PROBE_NORMAL;