diff options
Diffstat (limited to 'target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch')
| -rw-r--r-- | target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch b/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch deleted file mode 100644 index bdbec619e3..0000000000 --- a/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch +++ /dev/null @@ -1,154 +0,0 @@ ---- a/arch/arm/Kconfig -+++ b/arch/arm/Kconfig -@@ -435,7 +435,6 @@ config ARCH_IXP4XX - select CPU_XSCALE - select GENERIC_GPIO - select GENERIC_CLOCKEVENTS -- select DMABOUNCE if PCI - help - Support for Intel's IXP4XX (XScale) family of processors. - ---- a/arch/arm/mach-ixp4xx/Kconfig -+++ b/arch/arm/mach-ixp4xx/Kconfig -@@ -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" -+ depends on PCI -+ default n -+ select DMABOUNCE -+ help -+ The IXP4xx is limited to a 64MB window for PCI DMA, which -+ requires that PCI accesses >= 64MB are bounced via buffers -+ below 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. -+ -+ Enabling this option makes IXP4xx continue to use the problematic -+ ARM DMA bounce code. Disabling this option makes IXP4xx use the -+ kernel's generic bounce code. -+ -+ Say 'N'. -+ -+config IXP4XX_ZONE_DMA -+ bool "Support > 64MB RAM" -+ depends on !IXP4XX_LEGACY_DMABOUNCE -+ default y -+ select ZONE_DMA -+ 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. -+ -+ Disabling this option allows you to omit the support code for -+ DMA-able memory allocations and DMA bouncing, but the kernel -+ will then not work properly if more than 64MB of RAM is present. -+ -+ Say 'Y' unless your platform is limited to <= 64MB of RAM. -+ - config IXP4XX_QMGR - tristate "IXP4xx Queue Manager support" - help ---- a/arch/arm/mach-ixp4xx/common-pci.c -+++ b/arch/arm/mach-ixp4xx/common-pci.c -@@ -321,27 +321,33 @@ static int abort_handler(unsigned long a - */ - static int ixp4xx_pci_platform_notify(struct device *dev) - { -- if(dev->bus == &pci_bus_type) { -- *dev->dma_mask = SZ_64M - 1; -+ if (dev->bus == &pci_bus_type) { -+ *dev->dma_mask = SZ_64M - 1; - dev->coherent_dma_mask = SZ_64M - 1; -+#ifdef CONFIG_DMABOUNCE - dmabounce_register_dev(dev, 2048, 4096); -+#endif - } - return 0; - } - - static int ixp4xx_pci_platform_notify_remove(struct device *dev) - { -- if(dev->bus == &pci_bus_type) { -+#ifdef CONFIG_DMABOUNCE -+ if (dev->bus == &pci_bus_type) - dmabounce_unregister_dev(dev); -- } -+#endif - return 0; - } - --int dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size) -+#ifdef CONFIG_DMABOUNCE -+int dma_needs_bounce_2(struct device *dev, dma_addr_t dma_addr, size_t size) - { -- return (dev->bus == &pci_bus_type ) && ((dma_addr + size) >= SZ_64M); -+ return (dev->bus == &pci_bus_type ) && ((dma_addr + size) > SZ_64M); - } -+#endif - -+#ifdef CONFIG_ZONE_DMA - /* - * Only first 64MB of memory can be accessed via PCI. - * We use GFP_DMA to allocate safe buffers to do map/unmap. -@@ -364,6 +370,7 @@ void __init ixp4xx_adjust_zones(unsigned - zhole_size[1] = zhole_size[0]; - zhole_size[0] = 0; - } -+#endif - - void __init ixp4xx_pci_preinit(void) - { ---- a/arch/arm/mach-ixp4xx/include/mach/memory.h -+++ b/arch/arm/mach-ixp4xx/include/mach/memory.h -@@ -16,10 +16,12 @@ - - #if !defined(__ASSEMBLY__) && defined(CONFIG_PCI) - -+#ifdef CONFIG_ZONE_DMA - void ixp4xx_adjust_zones(unsigned long *size, unsigned long *holes); - - #define arch_adjust_zones(size, holes) \ - ixp4xx_adjust_zones(size, holes) -+#endif - - #define ISA_DMA_THRESHOLD (SZ_64M - 1) - #define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_64M) ---- a/arch/arm/common/dmabounce.c -+++ b/arch/arm/common/dmabounce.c -@@ -30,6 +30,7 @@ - #include <linux/dma-mapping.h> - #include <linux/dmapool.h> - #include <linux/list.h> -+#include <linux/pci.h> - #include <linux/scatterlist.h> - - #include <asm/cacheflush.h> -@@ -248,7 +249,13 @@ static inline dma_addr_t map_single(stru - needs_bounce = (dma_addr | (dma_addr + size - 1)) & ~mask; - } - -- if (device_info && (needs_bounce || dma_needs_bounce(dev, dma_addr, size))) { -+#ifdef CONFIG_DMABOUNCE -+int dma_needs_bounce_2(struct device *dev, dma_addr_t dma_addr, size_t size) -+{ -+ return (dev->bus == &pci_bus_type ) && ((dma_addr + size) > SZ_64M); -+} -+ -+ if (device_info && (needs_bounce || dma_needs_bounce_2(dev, dma_addr, size))) { - struct safe_buffer *buf; - - buf = alloc_safe_buffer(device_info, ptr, size, dir); -@@ -282,6 +289,7 @@ static inline dma_addr_t map_single(stru - - return dma_addr; - } -+#endif - - static inline void unmap_single(struct device *dev, dma_addr_t dma_addr, - size_t size, enum dma_data_direction dir) |