From: Atsushi Nemoto 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 Cc: Greg KH Cc: Daniel Ritz Cc: Ralf Baechle Cc: Ivan Kokshaysky Cc: Dominik Brodowski Signed-off-by: Andrew Morton --- Documentation/kernel-parameters.txt | 6 +++++ drivers/pci/pci.c | 6 +++++ drivers/pci/setup-bus.c | 27 ++++++++++++++------------ include/linux/pci.h | 3 ++ 4 files changed, 30 insertions(+), 12 deletions(-) diff -puN Documentation/kernel-parameters.txt~make-cardbus_mem_size-and-cardbus_io_size-boot-options Documentation/kernel-parameters.txt --- a/Documentation/kernel-parameters.txt~make-cardbus_mem_size-and-cardbus_io_size-boot-options +++ a/Documentation/kernel-parameters.txt @@ -1269,6 +1269,12 @@ and is between 256 and 4096 characters. 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 -puN drivers/pci/pci.c~make-cardbus_mem_size-and-cardbus_io_size-boot-options drivers/pci/pci.c --- a/drivers/pci/pci.c~make-cardbus_mem_size-and-cardbus_io_size-boot-options +++ a/drivers/pci/pci.c @@ -1205,6 +1205,12 @@ 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 -puN drivers/pci/setup-bus.c~make-cardbus_mem_size-and-cardbus_io_size-boot-options drivers/pci/setup-bus.c --- a/drivers/pci/setup-bus.c~make-cardbus_mem_size-and-cardbus_io_size-boot-options +++ a/drivers/pci/setup-bus.c @@ -40,8 +40,11 @@ * 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) +#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; static void __devinit pbus_assign_resources_sorted(struct pci_bus *bus) @@ -415,12 +418,12 @@ 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 +443,16 @@ 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 -puN include/linux/pci.h~make-cardbus_mem_size-and-cardbus_io_size-boot-options include/linux/pci.h --- a/include/linux/pci.h~make-cardbus_mem_size-and-cardbus_io_size-boot-options +++ a/include/linux/pci.h @@ -835,5 +835,8 @@ 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 */ _