sh: introduce a sh_cacheop_vaddr helper

And use it in the maple bus code to avoid a dma API dependency.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Yoshinori Sato <ysato@users.sourceforge.jp>

diff --git a/arch/sh/include/asm/cacheflush.h b/arch/sh/include/asm/cacheflush.h
index d103ab5..b932e42 100644 (file)
--- a/arch/sh/include/asm/cacheflush.h
+++ b/arch/sh/include/asm/cacheflush.h
@@ -101,5 +101,12 @@ void kunmap_coherent(void *kvaddr);
 
 void cpu_cache_init(void);
 
+static inline void *sh_cacheop_vaddr(void *vaddr)
+{
+       if (__in_29bit_mode())
+               vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
+       return vaddr;
+}
+
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_CACHEFLUSH_H */

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index e9d422b..1622ae6 100644 (file)
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -74,10 +74,7 @@ void dma_generic_free_coherent(struct device *dev, size_t size,
 void sh_sync_dma_for_device(void *vaddr, size_t size,
                    enum dma_data_direction direction)
 {
-       void *addr;
-
-       addr = __in_29bit_mode() ?
-              (void *)CAC_ADDR((unsigned long)vaddr) : vaddr;
+       void *addr = sh_cacheop_vaddr(vaddr);
 
        switch (direction) {
        case DMA_FROM_DEVICE:           /* invalidate only */
@@ -93,7 +90,6 @@ void sh_sync_dma_for_device(void *vaddr, size_t size,
                BUG();
        }
 }
-EXPORT_SYMBOL(sh_sync_dma_for_device);
 
 static int __init memchunk_setup(char *str)
 {

diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index 2e45988..e5d7fb8 100644 (file)
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -300,8 +300,8 @@ static void maple_send(void)
        mutex_unlock(&maple_wlist_lock);
        if (maple_packets > 0) {
                for (i = 0; i < (1 << MAPLE_DMA_PAGES); i++)
-                       sh_sync_dma_for_device(maple_sendbuf + i * PAGE_SIZE,
-                                      PAGE_SIZE, DMA_BIDIRECTIONAL);
+                       __flush_purge_region(maple_sendbuf + i * PAGE_SIZE,
+                                       PAGE_SIZE);
        }
 
 finish:
@@ -642,7 +642,8 @@ static void maple_dma_handler(struct work_struct *work)
                list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
                        mdev = mq->dev;
                        recvbuf = mq->recvbuf->buf;
-                       sh_sync_dma_for_device(recvbuf, 0x400, DMA_FROM_DEVICE);
+                       __flush_invalidate_region(sh_cacheop_vaddr(recvbuf),
+                                       0x400);
                        code = recvbuf[0];
                        kfree(mq->sendbuf);
                        list_del_init(&mq->list);