Commit 4516a618 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Greg Kroah-Hartman
Browse files

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: default avatarAtsushi 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 26ba05e4

Documentation/kernel-parameters.txt

+6 −0
Original line number Diff line number Diff line
@@ -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

drivers/pci/pci.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

drivers/pci/setup-bus.c

+10 −17
Original line number Diff line number Diff line
@@ -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;

	}

}

include/linux/pci.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */

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