diff options
68 files changed, 18312 insertions, 0 deletions
diff --git a/packages/linux/linux-rp-2.6.24/tosa/0001-Allow-runtime-registration-of-regions-of-memory-that.patch b/packages/linux/linux-rp-2.6.24/tosa/0001-Allow-runtime-registration-of-regions-of-memory-that.patch new file mode 100644 index 0000000000..ba79b4a470 --- /dev/null +++ b/packages/linux/linux-rp-2.6.24/tosa/0001-Allow-runtime-registration-of-regions-of-memory-that.patch @@ -0,0 +1,201 @@ +From d48a09b301d9a460d5ce027433e8cb8872e7b5c3 Mon Sep 17 00:00:00 2001 +From: Ian Molton <spyro@f2s.com> +Date: Fri, 4 Jan 2008 18:26:38 +0000 +Subject: [PATCH 01/64] Allow runtime registration of regions of memory that require dma bouncing. + +--- + arch/arm/common/Kconfig | 4 ++ + arch/arm/common/dmabounce.c | 82 ++++++++++++++++++++++++++++++++++++- + arch/arm/common/sa1111.c | 2 +- + arch/arm/mach-ixp4xx/Kconfig | 1 + + arch/arm/mach-ixp4xx/common-pci.c | 2 +- + 5 files changed, 87 insertions(+), 4 deletions(-) + +diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig +index 3e07346..5f357fb 100644 +--- a/arch/arm/common/Kconfig ++++ b/arch/arm/common/Kconfig +@@ -13,10 +13,14 @@ config ICST307 + config SA1111 + bool + select DMABOUNCE ++ select PLATFORM_DMABOUNCE + + config DMABOUNCE + bool + ++config PLATFORM_DMABOUNCE ++ bool ++ + config TIMER_ACORN + bool + +diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c +index 52fc6a8..ed80abe 100644 +--- a/arch/arm/common/dmabounce.c ++++ b/arch/arm/common/dmabounce.c +@@ -16,6 +16,7 @@ + * + * Copyright (C) 2002 Hewlett Packard Company. + * Copyright (C) 2004 MontaVista Software, Inc. ++ * Copyright (C) 2007 Dmitry Baryshkov <dbaryshkov@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License +@@ -24,6 +25,7 @@ + + #include <linux/module.h> + #include <linux/init.h> ++#include <linux/rwsem.h> + #include <linux/slab.h> + #include <linux/device.h> + #include <linux/dma-mapping.h> +@@ -80,6 +82,80 @@ struct dmabounce_device_info { + rwlock_t lock; + }; + ++struct dmabounce_check_entry { ++ struct list_head list; ++ dmabounce_check checker; ++ void *data; ++}; ++ ++static struct list_head checkers = LIST_HEAD_INIT(checkers); ++static rwlock_t checkers_lock = RW_LOCK_UNLOCKED; ++ ++int ++dmabounce_register_checker(dmabounce_check function, void *data) ++{ ++ unsigned long flags; ++ struct dmabounce_check_entry *entry = ++ kzalloc(sizeof(struct dmabounce_check_entry), GFP_ATOMIC); ++ ++ if (!entry) ++ return ENOMEM; ++ ++ INIT_LIST_HEAD(&entry->list); ++ entry->checker = function; ++ entry->data = data; ++ ++ write_lock_irqsave(&checkers_lock, flags); ++ list_add(&entry->list, &checkers); ++ write_unlock_irqrestore(&checkers_lock, flags); ++ ++ return 0; ++} ++ ++void ++dmabounce_remove_checker(dmabounce_check function, void *data) ++{ ++ unsigned long flags; ++ struct list_head *pos; ++ ++ write_lock_irqsave(&checkers_lock, flags); ++ __list_for_each(pos, &checkers) { ++ struct dmabounce_check_entry *entry = container_of(pos, ++ struct dmabounce_check_entry, list); ++ if (entry->checker == function && entry->data == data) { ++ list_del(pos); ++ write_unlock_irqrestore(&checkers_lock, flags); ++ kfree(entry); ++ return; ++ } ++ } ++ ++ write_unlock_irqrestore(&checkers_lock, flags); ++ printk(KERN_WARNING "dmabounce checker not found: %p\n", function); ++} ++ ++static int dma_needs_bounce(struct device *dev, dma_addr_t dma, size_t size) ++{ ++ unsigned long flags; ++ struct list_head *pos; ++ ++ read_lock_irqsave(&checkers_lock, flags); ++ __list_for_each(pos, &checkers) { ++ struct dmabounce_check_entry *entry = container_of(pos, ++ struct dmabounce_check_entry, list); ++ if (entry->checker(dev, dma, size, entry->data)) { ++ read_unlock_irqrestore(&checkers_lock, flags); ++ return 1; ++ } ++ } ++ ++ read_unlock_irqrestore(&checkers_lock, flags); ++#ifdef CONFIG_PLATFORM_DMABOUNCE ++ return platform_dma_needs_bounce(dev, dma, size); ++#else ++ return 0; ++#endif ++} + #ifdef STATS + static ssize_t dmabounce_show(struct device *dev, struct device_attribute *attr, + char *buf) +@@ -239,7 +315,7 @@ map_single(struct device *dev, void *ptr, size_t size, + struct safe_buffer *buf; + + buf = alloc_safe_buffer(device_info, ptr, size, dir); +- if (buf == 0) { ++ if (buf == NULL) { + dev_err(dev, "%s: unable to map unsafe buffer %p!\n", + __func__, ptr); + return 0; +@@ -643,7 +719,6 @@ dmabounce_unregister_dev(struct device *dev) + dev->bus_id, dev->bus->name); + } + +- + EXPORT_SYMBOL(dma_map_single); + EXPORT_SYMBOL(dma_unmap_single); + EXPORT_SYMBOL(dma_map_sg); +@@ -653,6 +728,9 @@ EXPORT_SYMBOL(dma_sync_single_for_device); + EXPORT_SYMBOL(dma_sync_sg); + EXPORT_SYMBOL(dmabounce_register_dev); + EXPORT_SYMBOL(dmabounce_unregister_dev); ++EXPORT_SYMBOL(dmabounce_register_checker); ++EXPORT_SYMBOL(dmabounce_remove_checker); ++ + + MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>, Deepak Saxena <dsaxena@plexity.net>"); + MODULE_DESCRIPTION("Special dma_{map/unmap/dma_sync}_* routines for systems with limited DMA windows"); +diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c +index eb06d0b..3b8fbdd 100644 +--- a/arch/arm/common/sa1111.c ++++ b/arch/arm/common/sa1111.c +@@ -778,7 +778,7 @@ static void __sa1111_remove(struct sa1111 *sachip) + * This should only get called for sa1111_device types due to the + * way we configure our device dma_masks. + */ +-int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) ++int platform_dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size) + { + /* + * Section 4.6 of the "Intel StrongARM SA-1111 Development Module +diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig +index 61b2dfc..5870371 100644 +--- a/arch/arm/mach-ixp4xx/Kconfig ++++ b/arch/arm/mach-ixp4xx/Kconfig +@@ -161,6 +161,7 @@ comment "IXP4xx Options" + config DMABOUNCE + bool + default y ++ select PLATFORM_DMABOUNCE + depends on PCI + + config IXP4XX_INDIRECT_PCI +diff --git a/arch/arm/mach-ixp4xx/common-pci.c b/arch/arm/mach-ixp4xx/common-pci.c +index bf04121..ac46492 100644 +--- a/arch/arm/mach-ixp4xx/common-pci.c ++++ b/arch/arm/mach-ixp4xx/common-pci.c +@@ -336,7 +336,7 @@ static int ixp4xx_pci_platform_notify_remove(struct device *dev) + return 0; + } + +-int dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size) ++int platform_dma_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size) + { + return (dev->bus == &pci_bus_type ) && ((dma_addr + size) >= SZ_64M); + } +-- +1.5.3.8 + diff --git a/packages/linux/linux-rp-2.6.24/tosa/0002-Modify-dma_alloc_coherent-on-ARM-so-that-it-supports.patch b/packages/linux/linux-rp-2.6.24/tosa/0002-Modify-dma_alloc_coherent-on-ARM-so-that-it-supports.patch new file mode 100644 index 0000000000..a562ef921b --- /dev/null +++ b/packages/linux/linux-rp-2.6.24/tosa/0002-Modify-dma_alloc_coherent-on-ARM-so-that-it-supports.patch @@ -0,0 +1,260 @@ +From 8e95f90487d2fb46fd862744ddb34f47c30b0c5a Mon Sep 17 00:00:00 2001 +From: Ian Molton <spyro@f2s.com> +Date: Fri, 4 Jan 2008 18:27:50 +0000 +Subject: [PATCH 02/64] Modify dma_alloc_coherent on ARM so that it supports device local DMA. + +--- + arch/arm/mm/consistent.c | 125 +++++++++++++++++++++++++++++++++++++++++ + include/asm-arm/dma-mapping.h | 37 +++++++------ + 2 files changed, 145 insertions(+), 17 deletions(-) + +diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c +index 333a82a..3da0f94 100644 +--- a/arch/arm/mm/consistent.c ++++ b/arch/arm/mm/consistent.c +@@ -3,6 +3,8 @@ + * + * Copyright (C) 2000-2004 Russell King + * ++ * Device local coherent memory support added by Ian Molton (spyro@f2s.com) ++ * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +@@ -20,6 +22,7 @@ + + #include <asm/memory.h> + #include <asm/cacheflush.h> ++#include <asm/io.h> + #include <asm/tlbflush.h> + #include <asm/sizes.h> + +@@ -35,6 +38,13 @@ + #define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT) + #define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT) + ++struct dma_coherent_mem { ++ void *virt_base; ++ u32 device_base; ++ int size; ++ int flags; ++ unsigned long *bitmap; ++}; + + /* + * These are the page tables (2MB each) covering uncached, DMA consistent allocations +@@ -153,6 +163,13 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, + unsigned long order; + u64 mask = ISA_DMA_THRESHOLD, limit; + ++ /* Following is a work-around (a.k.a. hack) to prevent pages ++ * with __GFP_COMP being passed to split_page() which cannot ++ * handle them. The real problem is that this flag probably ++ * should be 0 on ARM as it is not supported on this ++ * platform--see CONFIG_HUGETLB_PAGE. */ ++ gfp &= ~(__GFP_COMP); ++ + if (!consistent_pte[0]) { + printk(KERN_ERR "%s: not initialised\n", __func__); + dump_stack(); +@@ -160,6 +177,26 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, + } + + if (dev) { ++ ++ if (dev->dma_mem) { ++ unsigned long flags; ++ int pgnum; ++ void *ret; ++ ++ spin_lock_irqsave(&consistent_lock, flags); ++ pgnum = bitmap_find_free_region(dev->dma_mem->bitmap, ++ dev->dma_mem->size, ++ get_order(size)); ++ spin_unlock_irqrestore(&consistent_lock, flags); ++ ++ if (pgnum >= 0) { ++ *handle = dev->dma_mem->device_base + (pgnum << PAGE_SHIFT); ++ ret = dev->dma_mem->virt_base + (pgnum << PAGE_SHIFT); ++ memset(ret, 0, size); ++ return ret; ++ } ++ } ++ + mask = dev->coherent_dma_mask; + + /* +@@ -177,6 +214,9 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, + mask, (unsigned long long)ISA_DMA_THRESHOLD); + goto no_page; + } ++ ++ if (dev->dma_mem && dev->dma_mem->flags & DMA_MEMORY_EXCLUSIVE) ++ return NULL; + } + + /* +@@ -359,6 +399,8 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr + pte_t *ptep; + int idx; + u32 off; ++ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL; ++ unsigned long order; + + WARN_ON(irqs_disabled()); + +@@ -368,6 +410,15 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr + } + + size = PAGE_ALIGN(size); ++ order = get_order(size); ++ ++ /* What if mem is valid and the range is not? */ ++ if (mem && cpu_addr >= mem->virt_base && cpu_addr < (mem->virt_base + (mem->size << PAGE_SHIFT))) { ++ int page = (cpu_addr - mem->virt_base) >> PAGE_SHIFT; ++ ++ bitmap_release_region(mem->bitmap, page, order); ++ return; ++ } + + spin_lock_irqsave(&consistent_lock, flags); + c = vm_region_find(&consistent_head, (unsigned long)cpu_addr); +@@ -437,6 +488,80 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr + } + EXPORT_SYMBOL(dma_free_coherent); + ++int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, ++ dma_addr_t device_addr, size_t size, int flags) ++{ ++ void __iomem *mem_base; ++ int pages = size >> PAGE_SHIFT; ++ int bitmap_size = (pages + 31)/32; ++ ++ if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0) ++ goto out; ++ if (!size) ++ goto out; ++ if (dev->dma_mem) ++ goto out; ++ ++ /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */ ++ mem_base = ioremap_nocache(bus_addr, size); ++ if (!mem_base) ++ goto out; ++ ++ dev->dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL); ++ if (!dev->dma_mem) ++ goto out; ++ memset(dev->dma_mem, 0, sizeof(struct dma_coherent_mem)); ++ dev->dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL); ++ if (!dev->dma_mem->bitmap) ++ goto free1_out; ++ ++ dev->dma_mem->virt_base = mem_base; ++ dev->dma_mem->device_base = device_addr; ++ dev->dma_mem->size = pages; ++ dev->dma_mem->flags = flags; ++ ++ if (flags & DMA_MEMORY_MAP) ++ return DMA_MEMORY_MAP; ++ ++ return DMA_MEMORY_IO; ++ ++ free1_out: ++ kfree(dev->dma_mem->bitmap); ++ out: ++ return 0; ++} ++EXPORT_SYMBOL(dma_declare_coherent_memory); ++ ++void dma_release_declared_memory(struct device *dev) ++{ ++ struct dma_coherent_mem *mem = dev->dma_mem; ++ ++ if (!mem) ++ return; ++ dev->dma_mem = NULL; ++ kfree(mem->bitmap); ++ kfree(mem); ++} ++EXPORT_SYMBOL(dma_release_declared_memory); ++ ++void *dma_mark_declared_memory_occupied(struct device *dev, ++ dma_addr_t device_addr, size_t size) ++{ ++ struct dma_coherent_mem *mem = dev->dma_mem; ++ int pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; ++ int pos, err; ++ ++ if (!mem) ++ return ERR_PTR(-EINVAL); ++ ++ pos = (device_addr - mem->device_base) >> PAGE_SHIFT; ++ err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages)); ++ if (err != 0) ++ return ERR_PTR(err); ++ return mem->virt_base + (pos << PAGE_SHIFT); ++} ++EXPORT_SYMBOL(dma_mark_declared_memory_occupied); ++ + /* + * Initialise the consistent memory allocation. + */ +diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h +index e99406a..f18ba05 100644 +--- a/include/asm-arm/dma-mapping.h ++++ b/include/asm-arm/dma-mapping.h +@@ -7,6 +7,19 @@ + + #include <linux/scatterlist.h> + ++#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY ++extern int ++dma_declare_coherent_memory(struct device * |