[SPARC32]: Move non-PCI DMA definitions out of pgtable.h

This also avoids a cyclic header inclusion problem with dma-mapping.h
and linux/mm.h triggered by the recent change to standard DMA definitions.

arch/sparc/kernel/ioport.c

@@ -41,7 +41,7 @@
 #include <asm/oplib.h>
 #include <asm/page.h>
 #include <asm/pgalloc.h>
-#include <asm/pgtable.h>
+#include <asm/dma.h>
 
 #define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */
 

arch/sparc/mm/io-unit.c

@@ -22,6 +22,7 @@
 #include <asm/bitops.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/dma.h>
 
 /* #define IOUNIT_DEBUG */
 #ifdef IOUNIT_DEBUG

arch/sparc/mm/iommu.c

@@ -25,6 +25,7 @@
 #include <asm/tlbflush.h>
 #include <asm/bitext.h>
 #include <asm/iommu.h>
+#include <asm/dma.h>
 
 /*
  * This can be sized dynamically, but we will do this

include/asm-sparc/dma.h

@@ -19,6 +19,7 @@
 #include <asm/io.h>
 #include <linux/spinlock.h>
 
+struct page;
 extern spinlock_t  dma_spin_lock;
 
 static __inline__ unsigned long claim_dma_lock(void)
@@ -244,4 +245,46 @@ extern int isa_dma_bridge_buggy;
 #define isa_dma_bridge_buggy	(0)
 #endif
 
+/* Routines for data transfer buffers. */
+BTFIXUPDEF_CALL(char *, mmu_lockarea, char *, unsigned long)
+BTFIXUPDEF_CALL(void,   mmu_unlockarea, char *, unsigned long)
+
+#define mmu_lockarea(vaddr,len) BTFIXUP_CALL(mmu_lockarea)(vaddr,len)
+#define mmu_unlockarea(vaddr,len) BTFIXUP_CALL(mmu_unlockarea)(vaddr,len)
+
+/* These are implementations for sbus_map_sg/sbus_unmap_sg... collapse later */
+BTFIXUPDEF_CALL(__u32, mmu_get_scsi_one, char *, unsigned long, struct sbus_bus *sbus)
+BTFIXUPDEF_CALL(void,  mmu_get_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
+BTFIXUPDEF_CALL(void,  mmu_release_scsi_one, __u32, unsigned long, struct sbus_bus *sbus)
+BTFIXUPDEF_CALL(void,  mmu_release_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
+
+#define mmu_get_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_get_scsi_one)(vaddr,len,sbus)
+#define mmu_get_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_get_scsi_sgl)(sg,sz,sbus)
+#define mmu_release_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_release_scsi_one)(vaddr,len,sbus)
+#define mmu_release_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_release_scsi_sgl)(sg,sz,sbus)
+
+/*
+ * mmu_map/unmap are provided by iommu/iounit; Invalid to call on IIep.
+ *
+ * The mmu_map_dma_area establishes two mappings in one go.
+ * These mappings point to pages normally mapped at 'va' (linear address).
+ * First mapping is for CPU visible address at 'a', uncached.
+ * This is an alias, but it works because it is an uncached mapping.
+ * Second mapping is for device visible address, or "bus" address.
+ * The bus address is returned at '*pba'.
+ *
+ * These functions seem distinct, but are hard to split. On sun4c,
+ * at least for now, 'a' is equal to bus address, and retured in *pba.
+ * On sun4m, page attributes depend on the CPU type, so we have to
+ * know if we are mapping RAM or I/O, so it has to be an additional argument
+ * to a separate mapping function for CPU visible mappings.
+ */
+BTFIXUPDEF_CALL(int,  mmu_map_dma_area, dma_addr_t *, unsigned long, unsigned long, int len)
+BTFIXUPDEF_CALL(struct page *, mmu_translate_dvma, unsigned long busa)
+BTFIXUPDEF_CALL(void,  mmu_unmap_dma_area, unsigned long busa, int len)
+
+#define mmu_map_dma_area(pba,va,a,len) BTFIXUP_CALL(mmu_map_dma_area)(pba,va,a,len)
+#define mmu_unmap_dma_area(ba,len) BTFIXUP_CALL(mmu_unmap_dma_area)(ba,len)
+#define mmu_translate_dvma(ba)     BTFIXUP_CALL(mmu_translate_dvma)(ba)
+
 #endif /* !(_ASM_SPARC_DMA_H) */

include/asm-sparc/pci.h

@@ -87,6 +87,12 @@ extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
 extern void pci_unmap_page(struct pci_dev *hwdev,
 			dma_addr_t dma_address, size_t size, int direction);
 
+/* map_page and map_single cannot fail */
+static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
+{
+	return 0;
+}
+
 /* Map a set of buffers described by scatterlist in streaming
  * mode for DMA.  This is the scather-gather version of the
  * above pci_map_single interface.  Here the scatter gather list

include/asm-sparc/pgtable.h

@@ -21,7 +21,6 @@
 #include <asm/pgtsrmmu.h>
 #include <asm/vac-ops.h>
 #include <asm/oplib.h>
-#include <asm/sbus.h>
 #include <asm/btfixup.h>
 #include <asm/system.h>
 
@@ -33,48 +32,6 @@ struct page;
 extern void load_mmu(void);
 extern unsigned long calc_highpages(void);
 
-/* Routines for data transfer buffers. */
-BTFIXUPDEF_CALL(char *, mmu_lockarea, char *, unsigned long)
-BTFIXUPDEF_CALL(void,   mmu_unlockarea, char *, unsigned long)
-
-#define mmu_lockarea(vaddr,len) BTFIXUP_CALL(mmu_lockarea)(vaddr,len)
-#define mmu_unlockarea(vaddr,len) BTFIXUP_CALL(mmu_unlockarea)(vaddr,len)
-
-/* These are implementations for sbus_map_sg/sbus_unmap_sg... collapse later */
-BTFIXUPDEF_CALL(__u32, mmu_get_scsi_one, char *, unsigned long, struct sbus_bus *sbus)
-BTFIXUPDEF_CALL(void,  mmu_get_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
-BTFIXUPDEF_CALL(void,  mmu_release_scsi_one, __u32, unsigned long, struct sbus_bus *sbus)
-BTFIXUPDEF_CALL(void,  mmu_release_scsi_sgl, struct scatterlist *, int, struct sbus_bus *sbus)
-
-#define mmu_get_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_get_scsi_one)(vaddr,len,sbus)
-#define mmu_get_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_get_scsi_sgl)(sg,sz,sbus)
-#define mmu_release_scsi_one(vaddr,len,sbus) BTFIXUP_CALL(mmu_release_scsi_one)(vaddr,len,sbus)
-#define mmu_release_scsi_sgl(sg,sz,sbus) BTFIXUP_CALL(mmu_release_scsi_sgl)(sg,sz,sbus)
-
-/*
- * mmu_map/unmap are provided by iommu/iounit; Invalid to call on IIep.
- *
- * The mmu_map_dma_area establishes two mappings in one go.
- * These mappings point to pages normally mapped at 'va' (linear address).
- * First mapping is for CPU visible address at 'a', uncached.
- * This is an alias, but it works because it is an uncached mapping.
- * Second mapping is for device visible address, or "bus" address.
- * The bus address is returned at '*pba'.
- *
- * These functions seem distinct, but are hard to split. On sun4c,
- * at least for now, 'a' is equal to bus address, and retured in *pba.
- * On sun4m, page attributes depend on the CPU type, so we have to
- * know if we are mapping RAM or I/O, so it has to be an additional argument
- * to a separate mapping function for CPU visible mappings.
- */
-BTFIXUPDEF_CALL(int,  mmu_map_dma_area, dma_addr_t *, unsigned long, unsigned long, int len)
-BTFIXUPDEF_CALL(struct page *, mmu_translate_dvma, unsigned long busa)
-BTFIXUPDEF_CALL(void,  mmu_unmap_dma_area, unsigned long busa, int len)
-
-#define mmu_map_dma_area(pba,va,a,len) BTFIXUP_CALL(mmu_map_dma_area)(pba,va,a,len)
-#define mmu_unmap_dma_area(ba,len) BTFIXUP_CALL(mmu_unmap_dma_area)(ba,len)
-#define mmu_translate_dvma(ba)     BTFIXUP_CALL(mmu_translate_dvma)(ba)
-
 BTFIXUPDEF_SIMM13(pgdir_shift)
 BTFIXUPDEF_SETHI(pgdir_size)
 BTFIXUPDEF_SETHI(pgdir_mask)