Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline

2 files changed, 0 insertions, 238 deletions

diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 8db35278a4b4..29b742b90f1f 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_PPC64)	+= copypage_64.o copyuser_64.o \
                            memcpy_64.o usercopy_64.o mem_64.o string.o
 obj-$(CONFIG_XMON)      += sstep.o
 obj-$(CONFIG_KPROBES)   += sstep.o
-obj-$(CONFIG_NOT_COHERENT_CACHE)        += dma-noncoherent.o
 
 ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_SMP)       += locks.o
diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c
deleted file mode 100644
index 005a28d380af..000000000000
--- a/arch/powerpc/lib/dma-noncoherent.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- *  PowerPC version derived from arch/arm/mm/consistent.c
- *    Copyright (C) 2001 Dan Malek (dmalek@jlc.net)
- *
- *  Copyright (C) 2000 Russell King
- *
- * Consistent memory allocators.  Used for DMA devices that want to
- * share uncached memory with the processor core.  The function return
- * is the virtual address and 'dma_handle' is the physical address.
- * Mostly stolen from the ARM port, with some changes for PowerPC.
- *                                              -- Dan
- *
- * Reorganized to get rid of the arch-specific consistent_* functions
- * and provide non-coherent implementations for the DMA API. -Matt
- *
- * Added in_interrupt() safe dma_alloc_coherent()/dma_free_coherent()
- * implementation. This is pulled straight from ARM and barely
- * modified. -Matt
- *
- * 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.
- */
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/highmem.h>
-#include <linux/dma-mapping.h>
-#include <linux/vmalloc.h>
-
-#include <asm/tlbflush.h>
-
-/*
- * Allocate DMA-coherent memory space and return both the kernel remapped
- * virtual and bus address for that space.
- */
-void *
-__dma_alloc_coherent(size_t size, dma_addr_t *handle, gfp_t gfp)
-{
-        struct page *page;
-        unsigned long order;
-        int i;
-        unsigned int nr_pages = PAGE_ALIGN(size)>>PAGE_SHIFT;
-        unsigned int array_size = nr_pages * sizeof(struct page *);
-        struct page **pages;
-        struct page *end;
-        u64 mask = 0x00ffffff, limit; /* ISA default */
-        struct vm_struct *area;
-
-        BUG_ON(!mem_init_done);
-        size = PAGE_ALIGN(size);
-        limit = (mask + 1) & ~mask;
-        if (limit && size >= limit) {
-                printk(KERN_WARNING "coherent allocation too big (requested "
-                                "%#x mask %#Lx)\n", size, mask);
-                return NULL;
-        }
-
-        order = get_order(size);
-
-        if (mask != 0xffffffff)
-                gfp |= GFP_DMA;
-
-        page = alloc_pages(gfp, order);
-        if (!page)
-                goto no_page;
-
-        end = page + (1 << order);
-
-        /*
-         * Invalidate any data that might be lurking in the
-         * kernel direct-mapped region for device DMA.
-         */
-        {
-                unsigned long kaddr = (unsigned long)page_address(page);
-                memset(page_address(page), 0, size);
-                flush_dcache_range(kaddr, kaddr + size);
-        }
-
-        split_page(page, order);
-
-        /*
-         * Set the "dma handle"
-         */
-        *handle = page_to_phys(page);
-
-        area = get_vm_area_caller(size, VM_IOREMAP,
-                        __builtin_return_address(1));
-        if (!area)
-                goto out_free_pages;
-
-        if (array_size > PAGE_SIZE) {
-                pages = vmalloc(array_size);
-                area->flags |= VM_VPAGES;
-        } else {
-                pages = kmalloc(array_size, GFP_KERNEL);
-        }
-        if (!pages)
-                goto out_free_area;
-
-        area->pages = pages;
-        area->nr_pages = nr_pages;
-
-        for (i = 0; i < nr_pages; i++)
-                pages[i] = page + i;
-
-        if (map_vm_area(area, pgprot_noncached(PAGE_KERNEL), &pages))
-                goto out_unmap;
-
-        /*
-         * Free the otherwise unused pages.
-         */
-        page += nr_pages;
-        while (page < end) {
-                __free_page(page);
-                page++;
-        }
-
-        return area->addr;
-out_unmap:
-        vunmap(area->addr);
-        if (array_size > PAGE_SIZE)
-                vfree(pages);
-        else
-                kfree(pages);
-        goto out_free_pages;
-out_free_area:
-        free_vm_area(area);
-out_free_pages:
-        if (page)
-                __free_pages(page, order);
-no_page:
-        return NULL;
-}
-EXPORT_SYMBOL(__dma_alloc_coherent);
-
-/*
- * free a page as defined by the above mapping.
- */
-void __dma_free_coherent(size_t size, void *vaddr)
-{
-        vfree(vaddr);
-
-}
-EXPORT_SYMBOL(__dma_free_coherent);
-
-/*
- * make an area consistent.
- */
-void __dma_sync(void *vaddr, size_t size, int direction)
-{
-        unsigned long start = (unsigned long)vaddr;
-        unsigned long end   = start + size;
-
-        switch (direction) {
-        case DMA_NONE:
-                BUG();
-        case DMA_FROM_DEVICE:
-                /*
-                 * invalidate only when cache-line aligned otherwise there is
-                 * the potential for discarding uncommitted data from the cache
-                 */
-                if ((start & (L1_CACHE_BYTES - 1)) || (size & (L1_CACHE_BYTES - 1)))
-                        flush_dcache_range(start, end);
-                else
-                        invalidate_dcache_range(start, end);
-                break;
-        case DMA_TO_DEVICE:             /* writeback only */
-                clean_dcache_range(start, end);
-                break;
-        case DMA_BIDIRECTIONAL: /* writeback and invalidate */
-                flush_dcache_range(start, end);
-                break;
-        }
-}
-EXPORT_SYMBOL(__dma_sync);
-
-#ifdef CONFIG_HIGHMEM
-/*
- * __dma_sync_page() implementation for systems using highmem.
- * In this case, each page of a buffer must be kmapped/kunmapped
- * in order to have a virtual address for __dma_sync(). This must
- * not sleep so kmap_atomic()/kunmap_atomic() are used.
- *
- * Note: yes, it is possible and correct to have a buffer extend
- * beyond the first page.
- */
-static inline void __dma_sync_page_highmem(struct page *page,
-                unsigned long offset, size_t size, int direction)
-{
-        size_t seg_size = min((size_t)(PAGE_SIZE - offset), size);
-        size_t cur_size = seg_size;
-        unsigned long flags, start, seg_offset = offset;
-        int nr_segs = 1 + ((size - seg_size) + PAGE_SIZE - 1)/PAGE_SIZE;
-        int seg_nr = 0;
-
-        local_irq_save(flags);
-
-        do {
-                start = (unsigned long)kmap_atomic(page + seg_nr,
-                                KM_PPC_SYNC_PAGE) + seg_offset;
-
-                /* Sync this buffer segment */
-                __dma_sync((void *)start, seg_size, direction);
-                kunmap_atomic((void *)start, KM_PPC_SYNC_PAGE);
-                seg_nr++;
-
-                /* Calculate next buffer segment size */
-                seg_size = min((size_t)PAGE_SIZE, size - cur_size);
-
-                /* Add the segment size to our running total */
-                cur_size += seg_size;
-                seg_offset = 0;
-        } while (seg_nr < nr_segs);
-
-        local_irq_restore(flags);
-}
-#endif /* CONFIG_HIGHMEM */
-
-/*
- * __dma_sync_page makes memory consistent. identical to __dma_sync, but
- * takes a struct page instead of a virtual address
- */
-void __dma_sync_page(struct page *page, unsigned long offset,
-        size_t size, int direction)
-{
-#ifdef CONFIG_HIGHMEM
-        __dma_sync_page_highmem(page, offset, size, direction);
-#else
-        unsigned long start = (unsigned long)page_address(page) + offset;
-        __dma_sync((void *)start, size, direction);
-#endif
-}
-EXPORT_SYMBOL(__dma_sync_page);