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-rw-r--r--Documentation/kernel-parameters.txt6
-rw-r--r--drivers/pci/pci.c10
-rw-r--r--drivers/pci/setup-bus.c27
-rw-r--r--include/linux/pci.h3
4 files changed, 29 insertions, 17 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index abd575cfc759..ce1f2c85e20f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1275,6 +1275,12 @@ and is between 256 and 4096 characters. It is defined in the file
This sorting is done to get a device
order compatible with older (<= 2.4) kernels.
nobfsort Don't sort PCI devices into breadth-first order.
+ cbiosize=nn[KMG] The fixed amount of bus space which is
+ reserved for the CardBus bridge's IO window.
+ The default value is 256 bytes.
+ cbmemsize=nn[KMG] The fixed amount of bus space which is
+ reserved for the CardBus bridge's memory
+ window. The default value is 64 megabytes.
pcmv= [HW,PCMCIA] BadgePAD 4
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index a7b869e24650..1e74e1ee8bd8 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -21,6 +21,12 @@
unsigned int pci_pm_d3_delay = 10;
+#define DEFAULT_CARDBUS_IO_SIZE (256)
+#define DEFAULT_CARDBUS_MEM_SIZE (64*1024*1024)
+/* pci=cbmemsize=nnM,cbiosize=nn can override this */
+unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
+unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
+
/**
* pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
* @bus: pointer to PCI bus structure to search
@@ -1333,6 +1339,10 @@ static int __devinit pci_setup(char *str)
if (*str && (str = pcibios_setup(str)) && *str) {
if (!strcmp(str, "nomsi")) {
pci_no_msi();
+ } else if (!strncmp(str, "cbiosize=", 9)) {
+ pci_cardbus_io_size = memparse(str + 9, &str);
+ } else if (!strncmp(str, "cbmemsize=", 10)) {
+ pci_cardbus_mem_size = memparse(str + 10, &str);
} else {
printk(KERN_ERR "PCI: Unknown option `%s'\n",
str);
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;
}
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 98c8765a488e..2c4b6842dfb9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -854,5 +854,8 @@ extern int pci_pci_problems;
#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
+extern unsigned long pci_cardbus_io_size;
+extern unsigned long pci_cardbus_mem_size;
+
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */