This is a note to let you know that I've just added the patch titled
ARM: PCI: versatile: Fix PCI I/O
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-pci-versatile-fix-pci-i-o.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 829f9fedee30cde2ec15e88d57ec11074db791e2 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@xxxxxxxxxx>
Date: Thu, 22 Aug 2013 17:47:49 +0100
Subject: ARM: PCI: versatile: Fix PCI I/O
From: Peter Maydell <peter.maydell@xxxxxxxxxx>
commit 829f9fedee30cde2ec15e88d57ec11074db791e2 upstream.
The versatile PCI controller code was confused between the
PCI I/O window (at 0x43000000) and the first PCI memory
window (at 0x44000000). Pass the correct base address to
pci_remap_io() so that PCI I/O accesses work.
Since the first PCI memory window isn't used at all (it's
an odd size), rename the associated variables and labels
so that it's clear that it isn't related to the I/O window.
This has been tested and confirmed to fix PCI I/O accesses
both on physical PB926+PCI backplane hardware and on QEMU.
Signed-off-by: Peter Maydell <peter.maydell@xxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-versatile/include/mach/platform.h | 2 ++
arch/arm/mach-versatile/pci.c | 16 ++++++++--------
2 files changed, 10 insertions(+), 8 deletions(-)
--- a/arch/arm/mach-versatile/include/mach/platform.h
+++ b/arch/arm/mach-versatile/include/mach/platform.h
@@ -231,12 +231,14 @@
/* PCI space */
#define VERSATILE_PCI_BASE 0x41000000 /* PCI Interface */
#define VERSATILE_PCI_CFG_BASE 0x42000000
+#define VERSATILE_PCI_IO_BASE 0x43000000
#define VERSATILE_PCI_MEM_BASE0 0x44000000
#define VERSATILE_PCI_MEM_BASE1 0x50000000
#define VERSATILE_PCI_MEM_BASE2 0x60000000
/* Sizes of above maps */
#define VERSATILE_PCI_BASE_SIZE 0x01000000
#define VERSATILE_PCI_CFG_BASE_SIZE 0x02000000
+#define VERSATILE_PCI_IO_BASE_SIZE 0x01000000
#define VERSATILE_PCI_MEM_BASE0_SIZE 0x0c000000 /* 32Mb */
#define VERSATILE_PCI_MEM_BASE1_SIZE 0x10000000 /* 256Mb */
#define VERSATILE_PCI_MEM_BASE2_SIZE 0x10000000 /* 256Mb */
--- a/arch/arm/mach-versatile/pci.c
+++ b/arch/arm/mach-versatile/pci.c
@@ -170,8 +170,8 @@ static struct pci_ops pci_versatile_ops
.write = versatile_write_config,
};
-static struct resource io_mem = {
- .name = "PCI I/O space",
+static struct resource unused_mem = {
+ .name = "PCI unused",
.start = VERSATILE_PCI_MEM_BASE0,
.end = VERSATILE_PCI_MEM_BASE0+VERSATILE_PCI_MEM_BASE0_SIZE-1,
.flags = IORESOURCE_MEM,
@@ -195,9 +195,9 @@ static int __init pci_versatile_setup_re
{
int ret = 0;
- ret = request_resource(&iomem_resource, &io_mem);
+ ret = request_resource(&iomem_resource, &unused_mem);
if (ret) {
- printk(KERN_ERR "PCI: unable to allocate I/O "
+ printk(KERN_ERR "PCI: unable to allocate unused "
"memory region (%d)\n", ret);
goto out;
}
@@ -205,7 +205,7 @@ static int __init pci_versatile_setup_re
if (ret) {
printk(KERN_ERR "PCI: unable to allocate non-prefetchable "
"memory region (%d)\n", ret);
- goto release_io_mem;
+ goto release_unused_mem;
}
ret = request_resource(&iomem_resource, &pre_mem);
if (ret) {
@@ -225,8 +225,8 @@ static int __init pci_versatile_setup_re
release_non_mem:
release_resource(&non_mem);
- release_io_mem:
- release_resource(&io_mem);
+ release_unused_mem:
+ release_resource(&unused_mem);
out:
return ret;
}
@@ -246,7 +246,7 @@ int __init pci_versatile_setup(int nr, s
goto out;
}
- ret = pci_ioremap_io(0, VERSATILE_PCI_MEM_BASE0);
+ ret = pci_ioremap_io(0, VERSATILE_PCI_IO_BASE);
if (ret)
goto out;
Patches currently in stable-queue which might be from peter.maydell@xxxxxxxxxx are
queue-3.10/arm-pci-versatile-fix-pci-i-o.patch
queue-3.10/arm-pci-versatile-fix-smap-register-offsets.patch
queue-3.10/arm-pci-versatile-fix-map_irq-function-to-match-hardware.patch
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