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ixp4xx: add Mikael Petterssons patch works for 2.6.33 & 2.6.35

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21879 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
acoul 2010-06-22 14:10:55 +00:00
parent 784f7308a0
commit 64b6ac3b3d
7 changed files with 134 additions and 19 deletions
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12
target/linux/ixp4xx/patches-2.6.33/601-arm-dma_free_coherent.patch Normal file
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@ -0,0 +1,12 @@
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -384,7 +384,8 @@ EXPORT_SYMBOL(dma_mmap_writecombine);
*/
void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle)
{
- WARN_ON(irqs_disabled());
+ if (irqs_disabled()) /* don't want stack dumps for these! */
+ printk("WARNING: at %s:%d %s()\n", __FILE__, __LINE__, __FUNCTION__);
if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
return;

33
target/linux/ixp4xx/patches-2.6.33/603-arm-kluin-array-indexing.patch Normal file
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@ -0,0 +1,33 @@
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -322,12 +322,13 @@ static void __init setup_processor(void)
void cpu_init(void)
{
unsigned int cpu = smp_processor_id();
- struct stack *stk = &stacks[cpu];
+ struct stack *stk;
if (cpu >= NR_CPUS) {
printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
BUG();
}
+ stk = &stacks[cpu];
/*
* Define the placement constraint for the inline asm directive below.
@@ -386,13 +387,14 @@ static struct machine_desc * __init setu
static int __init arm_add_memory(unsigned long start, unsigned long size)
{
- struct membank *bank = &meminfo.bank[meminfo.nr_banks];
+ struct membank *bank;
if (meminfo.nr_banks >= NR_BANKS) {
printk(KERN_CRIT "NR_BANKS too low, "
"ignoring memory at %#lx\n", start);
return -EINVAL;
}
+ bank = &meminfo.bank[meminfo.nr_banks];
/*
* Ensure that start/size are aligned to a page boundary.

20
target/linux/ixp4xx/patches-2.6.33/604-arm-ixp4xx-sched_clock.patch Normal file
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@ -0,0 +1,20 @@
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -427,6 +427,17 @@ static void __init ixp4xx_clocksource_in
}
/*
+ * sched_clock()
+ */
+unsigned long long sched_clock(void)
+{
+ cycle_t cyc = ixp4xx_get_cycles(NULL);
+ struct clocksource *cs = &clocksource_ixp4xx;
+
+ return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
+}
+
+/*
* clockevents
*/
static int ixp4xx_set_next_event(unsigned long evt,

11
target/linux/ixp4xx/patches-2.6.33/605-arm-rmk-cache-flush-optim.patch Normal file
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@ -0,0 +1,11 @@
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -127,8 +127,6 @@ make_coherent(struct address_space *mapp
flush_dcache_mmap_unlock(mapping);
if (aliases)
adjust_pte(vma, addr);
- else
- flush_cache_page(vma, addr, pfn);
}
/*

32
target/linux/ixp4xx/patches-2.6.35/050-disable_dmabounce.patch
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@ -1,8 +1,8 @@
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -417,7 +417,6 @@ config ARCH_IXP4XX
@@ -435,7 +435,6 @@ config ARCH_IXP4XX
select CPU_XSCALE
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
- select DMABOUNCE if PCI
help
@ -10,26 +10,24 @@
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -199,6 +199,45 @@ config IXP4XX_INDIRECT_PCI
@@ -199,6 +199,43 @@ config IXP4XX_INDIRECT_PCI
need to use the indirect method instead. If you don't know
what you need, leave this option unselected.
+config IXP4XX_LEGACY_DMABOUNCE
+ bool "legacy PCI DMA bounce support"
+ bool "Legacy PCI DMA bounce support"
+ depends on PCI
+ default n
+ select DMABOUNCE
+ help
+ The IXP4xx is limited to a 64MB window for PCI DMA, which
+ requires that PCI accesses above 64MB are bounced via buffers
+ below 64MB. Furthermore the IXP4xx has an erratum where PCI
+ read prefetches just below the 64MB limit can trigger lockups.
+ requires that PCI accesses >= 64MB are bounced via buffers
+ below 64MB.
+
+ The kernel has traditionally handled these two issue by using
+ ARM specific DMA bounce support code for all accesses >= 64MB.
+ The kernel has traditionally handled this issue by using ARM
+ specific DMA bounce support code for all accesses >= 64MB.
+ That code causes problems of its own, so it is desirable to
+ disable it. As the kernel now has a workaround for the PCI read
+ prefetch erratum, it no longer requires the ARM bounce code.
+ disable it.
+
+ Enabling this option makes IXP4xx continue to use the problematic
+ ARM DMA bounce code. Disabling this option makes IXP4xx use the
@ -58,7 +56,7 @@
help
--- a/arch/arm/mach-ixp4xx/common-pci.c
+++ b/arch/arm/mach-ixp4xx/common-pci.c
@@ -321,27 +321,38 @@ static int abort_handler(unsigned long a
@@ -321,27 +321,33 @@ static int abort_handler(unsigned long a
*/
static int ixp4xx_pci_platform_notify(struct device *dev)
{
@ -88,12 +86,8 @@
+#ifdef CONFIG_DMABOUNCE
int dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
{
+ /* Note that this returns true for the last page below 64M due to
+ * IXP4xx erratum 15 (SCR 1289), which states that PCI prefetches
+ * can cross the boundary between valid memory and a reserved region
+ * causing AHB bus errors and a lock-up.
+ */
return (dev->bus == &pci_bus_type ) && ((dma_addr + size) >= SZ_64M);
- return (dev->bus == &pci_bus_type ) && ((dma_addr + size) >= SZ_64M);
+ return (dev->bus == &pci_bus_type ) && ((dma_addr + size) > SZ_64M);
}
+#endif
@ -101,7 +95,7 @@
/*
* Only first 64MB of memory can be accessed via PCI.
* We use GFP_DMA to allocate safe buffers to do map/unmap.
@@ -364,6 +375,7 @@ void __init ixp4xx_adjust_zones(int node
@@ -364,6 +370,7 @@ void __init ixp4xx_adjust_zones(int node
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}

12
target/linux/ixp4xx/patches-2.6.35/601-arm-dma_free_coherent.patch Normal file
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@ -0,0 +1,12 @@
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -381,7 +381,8 @@ EXPORT_SYMBOL(dma_mmap_writecombine);
*/
void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle)
{
- WARN_ON(irqs_disabled());
+ if (irqs_disabled()) /* don't want stack dumps for these! */
+ printk("WARNING: at %s:%d %s()\n", __FILE__, __LINE__, __FUNCTION__);
if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
return;

33
target/linux/ixp4xx/patches-2.6.35/603-arm-kluin-array-indexing.patch Normal file
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@ -0,0 +1,33 @@
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -323,12 +323,13 @@ static void __init setup_processor(void)
void cpu_init(void)
{
unsigned int cpu = smp_processor_id();
- struct stack *stk = &stacks[cpu];
+ struct stack *stk;
if (cpu >= NR_CPUS) {
printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
BUG();
}
+ stk = &stacks[cpu];
/*
* Define the placement constraint for the inline asm directive below.
@@ -387,13 +388,14 @@ static struct machine_desc * __init setu
static int __init arm_add_memory(unsigned long start, unsigned long size)
{
- struct membank *bank = &meminfo.bank[meminfo.nr_banks];
+ struct membank *bank;
if (meminfo.nr_banks >= NR_BANKS) {
printk(KERN_CRIT "NR_BANKS too low, "
"ignoring memory at %#lx\n", start);
return -EINVAL;
}
+ bank = &meminfo.bank[meminfo.nr_banks];
/*
* Ensure that start/size are aligned to a page boundary.