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Message-Id: <20070123.103027.126140726.nemoto@toshiba-tops.co.jp>
Date: Tue, 23 Jan 2007 10:30:27 +0900 (JST)
From: Atsushi Nemoto <anemo@....ocn.ne.jp>
To: sshtylyov@...mvista.com
Cc: Eric.Piel@...l.fr, akpm@...l.org, ralf@...ux-mips.org,
linux-kernel@...r.kernel.org, linux-mips@...ux-mips.org
Subject: Re: [PATCH] Make CARDBUS_MEM_SIZE and CARDBUS_IO_SIZE customizable
On Mon, 22 Jan 2007 18:17:38 +0300, Sergei Shtylyov <sshtylyov@...mvista.com> wrote:
> > + cbiosize=nn[KMG] The fixed amount of bus space which is
> > + reserved for the CardBus bridges IO window.
>
> It shoyld be "bridge's"...
Thanks. Updated again.
Subject: [PATCH] Make CARDBUS_MEM_SIZE and CARDBUS_IO_SIZE customizable
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@....ocn.ne.jp>
---
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 --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 25d2985..a194b8f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1259,6 +1259,12 @@ 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 --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 206c834..639069a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1168,6 +1168,12 @@ 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 --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 89f3036..1dfc288 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -40,8 +40,11 @@ #define ROUND_UP(x, a) (((x) + (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)
+#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 --git a/include/linux/pci.h b/include/linux/pci.h
index f3c617e..ff04c69 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -837,5 +837,8 @@ #define PCIPCI_VSFX 16
#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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