microblaze: Cleanup PCI_DRAM_OFFSET handling

PCI_DRAM_OFFSET/pci_dram_offset is 0 all the time and there
is no difference for PCI and !PCI cases.
Also remove the whole code which setup archdata.dma_data
which is completely unused.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 3 insertions, 20 deletions

diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index da68d00fd087..8f9b99508e79 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -13,23 +13,6 @@
 #include <linux/export.h>
 #include <linux/bug.h>
 
-/*
- * Generic direct DMA implementation
- *
- * This implementation supports a per-device offset that can be applied if
- * the address at which memory is visible to devices is not 0. Platform code
- * can set archdata.dma_data to an unsigned long holding the offset. By
- * default the offset is PCI_DRAM_OFFSET.
- */
-
-static unsigned long get_dma_direct_offset(struct device *dev)
-{
-        if (likely(dev))
-                return (unsigned long)dev->archdata.dma_data;
-
-        return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */
-}
-
 #define NOT_COHERENT_CACHE
 
 static void *dma_direct_alloc_coherent(struct device *dev, size_t size,
@@ -51,7 +34,7 @@ static void *dma_direct_alloc_coherent(struct device *dev, size_t size,
                 return NULL;
         ret = page_address(page);
         memset(ret, 0, size);
-        *dma_handle = virt_to_phys(ret) + get_dma_direct_offset(dev);
+        *dma_handle = virt_to_phys(ret);
 
         return ret;
 #endif
@@ -77,7 +60,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
 
         /* FIXME this part of code is untested */
         for_each_sg(sgl, sg, nents, i) {
-                sg->dma_address = sg_phys(sg) + get_dma_direct_offset(dev);
+                sg->dma_address = sg_phys(sg);
                 __dma_sync(page_to_phys(sg_page(sg)) + sg->offset,
                                                         sg->length, direction);
         }
@@ -104,7 +87,7 @@ static inline dma_addr_t dma_direct_map_page(struct device *dev,
                                              struct dma_attrs *attrs)
 {
         __dma_sync(page_to_phys(page) + offset, size, direction);
-        return page_to_phys(page) + offset + get_dma_direct_offset(dev);
+        return page_to_phys(page) + offset;
 }
 
 static inline void dma_direct_unmap_page(struct device *dev,