Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [2/3] Remove dma_declare_coherent_memory etc. from cris | Date | Fri, 22 Feb 2008 15:23:29 +0100 (CET) |
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The DMA implementation seems to be only there for a single PCI driver and the driver does not use these interfaces. So remove it.
I don't have cris cross compilers so uncompiled/untested.
Cc: starvik@axis.com Cc: dev-extrax@axis.com Signed-off-by: Andi Kleen <ak@suse.de>
Index: linux/arch/cris/arch-v32/drivers/pci/dma.c =================================================================== --- linux.orig/arch/cris/arch-v32/drivers/pci/dma.c +++ linux/arch/cris/arch-v32/drivers/pci/dma.c @@ -27,24 +27,10 @@ void *dma_alloc_coherent(struct device * dma_addr_t *dma_handle, gfp_t gfp) { void *ret; - struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL; int order = get_order(size); /* ignore region specifiers */ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - if (mem) { - int page = bitmap_find_free_region(mem->bitmap, mem->size, - order); - if (page >= 0) { - *dma_handle = mem->device_base + (page << PAGE_SHIFT); - ret = mem->virt_base + (page << PAGE_SHIFT); - memset(ret, 0, size); - return ret; - } - if (mem->flags & DMA_MEMORY_EXCLUSIVE) - return NULL; - } - if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) gfp |= GFP_DMA; @@ -63,87 +49,6 @@ void dma_free_coherent(struct device *de struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL; int order = get_order(size); - if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) { - int page = (vaddr - mem->virt_base) >> PAGE_SHIFT; - - bitmap_release_region(mem->bitmap, page, order); - } else - free_pages((unsigned long)vaddr, order); -} - -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 = BITS_TO_LONGS(pages) * sizeof(long); - - 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(bus_addr, size); - if (!mem_base) - goto out; - - dev->dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL); - if (!dev->dma_mem) - goto iounmap_out; - 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); - iounmap_out: - iounmap(mem_base); - out: - return 0; + free_pages((unsigned long)vaddr, order); } -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; - iounmap(mem->virt_base); - 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 + (device_addr & ~PAGE_MASK) + 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); Index: linux/arch/cris/Kconfig =================================================================== --- linux.orig/arch/cris/Kconfig +++ linux/arch/cris/Kconfig @@ -47,11 +47,6 @@ config GENERIC_CALIBRATE_DELAY config NO_IOPORT def_bool y -config HAS_DMA_DECLARE_COHERENT - # looks weird, but it really depends on that - depends on ETRAX_CARDBUS - def_bool y - config FORCE_MAX_ZONEORDER int default 6
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