PCI: Make CARDBUS_MEM_SIZE and CARDBUS_IO_SIZE boot options

CARDBUS_MEM_SIZE was increased to 64MB on 2.6.20-rc2, but larger size might
result in allocation failure for the reserving itself on some platforms
(for example typical 32bit MIPS).  Make it (and CARDBUS_IO_SIZE too)
customizable by "pci=" option for such platforms.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 10 insertions, 17 deletions

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 89f3036f0de8..3554f3948814 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -36,13 +36,6 @@
 
 #define ROUND_UP(x, a)          (((x) + (a) - 1) & ~((a) - 1))
 
-/*
- * FIXME: IO should be max 256 bytes.  However, since we may
- * have a P2P bridge below a cardbus bridge, we need 4K.
- */
-#define CARDBUS_IO_SIZE         (256)
-#define CARDBUS_MEM_SIZE        (64*1024*1024)
-
 static void __devinit
 pbus_assign_resources_sorted(struct pci_bus *bus)
 {
@@ -415,12 +408,12 @@ pci_bus_size_cardbus(struct pci_bus *bus)
          * Reserve some resources for CardBus.  We reserve
          * a fixed amount of bus space for CardBus bridges.
          */
-        b_res[0].start = CARDBUS_IO_SIZE;
-        b_res[0].end = b_res[0].start + CARDBUS_IO_SIZE - 1;
+        b_res[0].start = pci_cardbus_io_size;
+        b_res[0].end = b_res[0].start + pci_cardbus_io_size - 1;
         b_res[0].flags |= IORESOURCE_IO;
 
-        b_res[1].start = CARDBUS_IO_SIZE;
-        b_res[1].end = b_res[1].start + CARDBUS_IO_SIZE - 1;
+        b_res[1].start = pci_cardbus_io_size;
+        b_res[1].end = b_res[1].start + pci_cardbus_io_size - 1;
         b_res[1].flags |= IORESOURCE_IO;
 
         /*
@@ -440,16 +433,16 @@ pci_bus_size_cardbus(struct pci_bus *bus)
          * twice the size.
          */
         if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) {
-                b_res[2].start = CARDBUS_MEM_SIZE;
-                b_res[2].end = b_res[2].start + CARDBUS_MEM_SIZE - 1;
+                b_res[2].start = pci_cardbus_mem_size;
+                b_res[2].end = b_res[2].start + pci_cardbus_mem_size - 1;
                 b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH;
 
-                b_res[3].start = CARDBUS_MEM_SIZE;
-                b_res[3].end = b_res[3].start + CARDBUS_MEM_SIZE - 1;
+                b_res[3].start = pci_cardbus_mem_size;
+                b_res[3].end = b_res[3].start + pci_cardbus_mem_size - 1;
                 b_res[3].flags |= IORESOURCE_MEM;
         } else {
-                b_res[3].start = CARDBUS_MEM_SIZE * 2;
-                b_res[3].end = b_res[3].start + CARDBUS_MEM_SIZE * 2 - 1;
+                b_res[3].start = pci_cardbus_mem_size * 2;
+                b_res[3].end = b_res[3].start + pci_cardbus_mem_size * 2 - 1;
                 b_res[3].flags |= IORESOURCE_MEM;
         }
 }