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Message-Id: <20080222142329.D9DDC1B4178@basil.firstfloor.org>
Date: Fri, 22 Feb 2008 15:23:29 +0100 (CET)
From: Andi Kleen <ak@...e.de>
To: starvik@...s.com, dev-extrax@...s.com,
linux-kernel@...r.kernel.org, akpm@...l.org
Subject: [PATCH] [2/3] Remove dma_declare_coherent_memory etc. from cris
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@...s.com
Cc: dev-extrax@...s.com
Signed-off-by: Andi Kleen <ak@...e.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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