[PATCH] CRIS update: pci

Patches to make it possible to add PCI support.

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 112 insertions, 58 deletions

diff --git a/include/asm-cris/dma-mapping.h b/include/asm-cris/dma-mapping.h
index 0d770f60127a..0b5c3fdaefe1 100644
--- a/include/asm-cris/dma-mapping.h
+++ b/include/asm-cris/dma-mapping.h
@@ -1,125 +1,179 @@
+/* DMA mapping. Nothing tricky here, just virt_to_phys */
+
 #ifndef _ASM_CRIS_DMA_MAPPING_H
 #define _ASM_CRIS_DMA_MAPPING_H
 
-#include "scatterlist.h"
+#include <linux/mm.h>
+#include <linux/kernel.h>
 
-static inline int
-dma_supported(struct device *dev, u64 mask)
-{
-        BUG();
-        return 0;
-}
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/scatterlist.h>
 
-static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
-{
-        BUG();
-        return 1;
-}
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+#ifdef CONFIG_PCI
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                           dma_addr_t *dma_handle, int flag);
 
+void dma_free_coherent(struct device *dev, size_t size,
+                         void *vaddr, dma_addr_t dma_handle);
+#else
 static inline void *
 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
-                   int flag)
+                   int flag)
 {
-        BUG();
-        return NULL;
+        BUG();
+        return NULL;
 }
 
 static inline void
 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
-                    dma_addr_t dma_handle)
+                    dma_addr_t dma_handle)
 {
-        BUG();
+        BUG();
 }
-
+#endif
 static inline dma_addr_t
-dma_map_single(struct device *dev, void *cpu_addr, size_t size,
+dma_map_single(struct device *dev, void *ptr, size_t size,
                enum dma_data_direction direction)
 {
-        BUG();
-        return 0;
+        BUG_ON(direction == DMA_NONE);
+        return virt_to_phys(ptr);
 }
 
 static inline void
 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
                  enum dma_data_direction direction)
 {
-        BUG();
+        BUG_ON(direction == DMA_NONE);
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+           enum dma_data_direction direction)
+{
+        printk("Map sg\n");
+        return nents;
 }
 
 static inline dma_addr_t
-dma_map_page(struct device *dev, struct page *page,
-             unsigned long offset, size_t size,
-             enum dma_data_direction direction)
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+             size_t size, enum dma_data_direction direction)
 {
-        BUG();
-        return 0;
+        BUG_ON(direction == DMA_NONE);
+        return page_to_phys(page) + offset;
 }
 
 static inline void
 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
                enum dma_data_direction direction)
 {
-        BUG();
+        BUG_ON(direction == DMA_NONE);
 }
 
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-           enum dma_data_direction direction)
-{
-        BUG();
-        return 1;
-}
 
 static inline void
 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
              enum dma_data_direction direction)
 {
-        BUG();
+        BUG_ON(direction == DMA_NONE);
 }
 
 static inline void
-dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
-                enum dma_data_direction direction)
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+                        enum dma_data_direction direction)
 {
-        BUG();
 }
 
 static inline void
-dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
-            enum dma_data_direction direction)
+dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+                        enum dma_data_direction direction)
 {
-        BUG();
 }
 
-/* Now for the API extensions over the pci_ one */
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                              unsigned long offset, size_t size,
+                              enum dma_data_direction direction)
+{
+}
 
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d)    (1)
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+                                 unsigned long offset, size_t size,
+                                 enum dma_data_direction direction)
+{
+}
 
-static inline int
-dma_get_cache_alignment(void)
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+                    enum dma_data_direction direction)
 {
-        /* no easy way to get cache size on all processors, so return
-         * the maximum possible, to be safe */
-        return (1 << L1_CACHE_SHIFT_MAX);
 }
 
 static inline void
-dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
-                      unsigned long offset, size_t size,
-                      enum dma_data_direction direction)
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+                    enum dma_data_direction direction)
 {
-        BUG();
 }
 
+static inline int
+dma_mapping_error(dma_addr_t dma_addr)
+{
+        return 0;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+        /*
+         * we fall back to GFP_DMA when the mask isn't all 1s,
+         * so we can't guarantee allocations that must be
+         * within a tighter range than GFP_DMA..
+         */
+        if(mask < 0x00ffffff)
+                return 0;
+
+        return 1;
+}
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+        if(!dev->dma_mask || !dma_supported(dev, mask))
+                return -EIO;
+
+        *dev->dma_mask = mask;
+
+        return 0;
+}
+
+static inline int
+dma_get_cache_alignment(void)
+{
+        return (1 << L1_CACHE_SHIFT_MAX);
+}
+
+#define dma_is_consistent(d)    (1)
+
 static inline void
 dma_cache_sync(void *vaddr, size_t size,
                enum dma_data_direction direction)
 {
-        BUG();
 }
 
-#endif
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+extern int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+                            dma_addr_t device_addr, size_t size, int flags);
+
+extern void
+dma_release_declared_memory(struct device *dev);
 
+extern void *
+dma_mark_declared_memory_occupied(struct device *dev,
+                                  dma_addr_t device_addr, size_t size);
+
+#endif