powerpc: make dma_window_* in pci_controller struct avail on 32b

Also, convert them to resource_size_t (which is unsigned long
on 64-bit, so it's not a change there).

We will be using these on fsl 32b to indicate the start and size
address of memory that the pci controller can actually reach - this
is needed to determine if an address requires bounce buffering.  For
now, initialize them to a standard value; in the near future, the
value will be calculated based on how the inbound windows are
programmed.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: Ben Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 8 insertions, 2 deletions

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 84007afabdb5..9861258f6a4c 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -140,10 +140,12 @@ struct pci_controller {
         struct resource io_resource;
         struct resource mem_resources[3];
         int global_number;              /* PCI domain number */
+
+        resource_size_t dma_window_base_cur;
+        resource_size_t dma_window_size;
+
 #ifdef CONFIG_PPC64
         unsigned long buid;
-        unsigned long dma_window_base_cur;
-        unsigned long dma_window_size;
 
         void *private_data;
 #endif  /* CONFIG_PPC64 */
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 78021d8afc53..376603df7c49 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -152,6 +152,10 @@ static void __init setup_pci_atmu(struct pci_controller *hose,
         out_be32(&pci->piw[2].piwbar,0x00000000);
         out_be32(&pci->piw[2].piwar, PIWAR_2G);
 
+        /* Save the base address and size covered by inbound window mappings */
+        hose->dma_window_base_cur = 0x00000000;
+        hose->dma_window_size = 0x80000000;
+
         iounmap(pci);
 }