2 files changed, 61 insertions, 16 deletions

diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 20ea0e118f2..d75ccded7f1 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -802,17 +802,24 @@ static int __init cell_iommu_init_disabled(void)
 
 static u64 cell_iommu_get_fixed_address(struct device *dev)
 {
-	u64 cpu_addr, size, best_size, pci_addr = OF_BAD_ADDR;
+	u64 cpu_addr, size, best_size, dev_addr = OF_BAD_ADDR;
 	struct device_node *np;
 	const u32 *ranges = NULL;
-	int i, len, best;
+	int i, len, best, naddr, nsize, pna, range_size;
 
 	np = of_node_get(dev->archdata.of_node);
-	while (np) {
+	while (1) {
+		naddr = of_n_addr_cells(np);
+		nsize = of_n_size_cells(np);
+		np = of_get_next_parent(np);
+		if (!np)
+			break;
+
 		ranges = of_get_property(np, "dma-ranges", &len);
-		if (ranges)
+
+		/* Ignore empty ranges, they imply no translation required */
+		if (ranges && len > 0)
 			break;
-		np = of_get_next_parent(np);
 	}
 
 	if (!ranges) {
@@ -822,15 +829,17 @@ static u64 cell_iommu_get_fixed_address(struct device *dev)
 
 	len /= sizeof(u32);
 
+	pna = of_n_addr_cells(np);
+	range_size = naddr + nsize + pna;
+
 	/* dma-ranges format:
-	 * 1 cell:  pci space
-	 * 2 cells: pci address
-	 * 2 cells: parent address
-	 * 2 cells: size
+	 * child addr	: naddr cells
+	 * parent addr	: pna cells
+	 * size		: nsize cells
 	 */
-	for (i = 0, best = -1, best_size = 0; i < len; i += 7) {
-		cpu_addr = of_translate_dma_address(np, ranges +i + 3);
-		size = of_read_number(ranges + i + 5, 2);
+	for (i = 0, best = -1, best_size = 0; i < len; i += range_size) {
+		cpu_addr = of_translate_dma_address(np, ranges + i + naddr);
+		size = of_read_number(ranges + i + naddr + pna, nsize);
 
 		if (cpu_addr == 0 && size > best_size) {
 			best = i;
@@ -838,15 +847,15 @@ static u64 cell_iommu_get_fixed_address(struct device *dev)
 		}
 	}
 
-	if (best >= 0)
-		pci_addr = of_read_number(ranges + best + 1, 2);
-	else
+	if (best >= 0) {
+		dev_addr = of_read_number(ranges + best, naddr);
+	} else
 		dev_dbg(dev, "iommu: no suitable range found!\n");
 
 out:
 	of_node_put(np);
 
-	return pci_addr;
+	return dev_addr;
 }
 
 static int dma_set_mask_and_switch(struct device *dev, u64 dma_mask)
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index dda34650cb0..5c531e8f9f6 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -81,6 +81,42 @@ static void cell_progress(char *s, unsigned short hex)
 	printk("*** %04x : %s\n", hex, s ? s : "");
 }
 
+static void cell_fixup_pcie_rootcomplex(struct pci_dev *dev)
+{
+	struct pci_controller *hose;
+	const char *s;
+	int i;
+
+	if (!machine_is(cell))
+		return;
+
+	/* We're searching for a direct child of the PHB */
+	if (dev->bus->self != NULL || dev->devfn != 0)
+		return;
+
+	hose = pci_bus_to_host(dev->bus);
+	if (hose == NULL)
+		return;
+
+	/* Only on PCIE */
+	if (!of_device_is_compatible(hose->dn, "pciex"))
+		return;
+
+	/* And only on axon */
+	s = of_get_property(hose->dn, "model", NULL);
+	if (!s || strcmp(s, "Axon") != 0)
+		return;
+
+	for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
+		dev->resource[i].start = dev->resource[i].end = 0;
+		dev->resource[i].flags = 0;
+	}
+
+	printk(KERN_DEBUG "PCI: Hiding resources on Axon PCIE RC %s\n",
+	       pci_name(dev));
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, cell_fixup_pcie_rootcomplex);
+
 static int __init cell_publish_devices(void)
 {
 	int node;