ia64: Make pci_dma_supported() a platform-specific function. Patch

	by Jesse Barnes.

arch/ia64/hp/common/sba_iommu.c

@@ -1389,6 +1389,12 @@ sba_dma_address (struct scatterlist *sg)
 	return ((unsigned long)sba_sg_iova(sg));
 }
 
+int
+sba_dma_supported (struct pci_dev *dev, u64 mask)
+{
+	return 1;
+}
+
 /**************************************************************
 *
 *   Initialization and claim
@@ -1858,5 +1864,6 @@ EXPORT_SYMBOL(sba_unmap_single);
 EXPORT_SYMBOL(sba_map_sg);
 EXPORT_SYMBOL(sba_unmap_sg);
 EXPORT_SYMBOL(sba_dma_address);
+EXPORT_SYMBOL(sba_dma_supported);
 EXPORT_SYMBOL(sba_alloc_consistent);
 EXPORT_SYMBOL(sba_free_consistent);

arch/ia64/lib/swiotlb.c

@@ -478,6 +478,17 @@ swiotlb_dma_address (struct scatterlist *sg)
 	return SG_ENT_PHYS_ADDRESS(sg);
 }
 
+/*
+ * Return whether the given PCI device DMA address mask can be supported properly.  For
+ * example, if your device can only drive the low 24-bits during PCI bus mastering, then
+ * you would pass 0x00ffffff as the mask to this function.
+ */
+int
+swiotlb_pci_dma_supported (struct pci_dev *hwdev, u64 mask)
+{
+	return 1;
+}
+
 EXPORT_SYMBOL(swiotlb_init);
 EXPORT_SYMBOL(swiotlb_map_single);
 EXPORT_SYMBOL(swiotlb_unmap_single);
@@ -488,3 +499,4 @@ EXPORT_SYMBOL(swiotlb_sync_sg);
 EXPORT_SYMBOL(swiotlb_dma_address);
 EXPORT_SYMBOL(swiotlb_alloc_consistent);
 EXPORT_SYMBOL(swiotlb_free_consistent);
+EXPORT_SYMBOL(swiotlb_pci_dma_supported);

arch/ia64/sn/io/Makefile

@@ -18,7 +18,7 @@ EXTRA_CFLAGS    := -DLITTLE_ENDIAN
 O_TARGET := sgiio.o
 
 ifeq ($(CONFIG_MODULES),y)
-export-objs = pciio.o hcl.o
+export-objs = pciio.o hcl.o pci_dma.o
 endif
 
 obj-y  := stubs.o sgi_if.o pciio.o xtalk.o xbow.o xswitch.o klgraph_hack.o \

arch/ia64/sn/io/pci_dma.c

@@ -4,6 +4,9 @@
  * for more details.
  *
  * Copyright (C) 2000,2002 Silicon Graphics, Inc. All rights reserved.
+ *
+ * Routines for PCI DMA mapping.  See Documentation/DMA-mapping.txt for
+ * a description of how these routines should be used.
  */
 
 #include <linux/types.h>
@@ -12,6 +15,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/devfs_fs_kernel.h>
+#include <linux/module.h>
 
 #include <asm/delay.h>
 #include <asm/io.h>
@@ -46,7 +50,7 @@ get_free_pciio_dmamap(devfs_handle_t pci_bus)
 	/*
 	 * Darn, we need to get the maps allocated for this bus.
 	 */
-	for (i=0; i<MAX_PCI_XWIDGET; i++) {
+	for (i = 0; i < MAX_PCI_XWIDGET; i++) {
 		if (busnum_to_pcibr_vhdl[i] == pci_bus) {
 			sn1_dma_map = busnum_to_atedmamaps[i];
 		}
@@ -314,22 +318,18 @@ sn1_pci_map_sg (struct pci_dev *hwdev,
 		}
 
 		/*
-		 * It is a 32bit card and we cannot do Direct mapping.
-		 * Let's 32Bit Page map the request.
+		 * It is a 32 bit card and we cannot do direct mapping,
+		 * so we use an ATE.
 		 */
-		dma_map = NULL;
-#ifdef CONFIG_IA64_SGI_SN1
+		dma_map = 0;
 		dma_map = pciio_dmamap_alloc(vhdl, NULL, sg->length,
-				PCIIO_BYTE_STREAM | PCIIO_DMA_DATA);
-#else
-		dma_map = pciio_dmamap_alloc(vhdl, NULL, sg->length, PCIIO_DMA_DATA);
-#endif
+					     DMA_DATA_FLAGS);
 		if (!dma_map) {
-			printk("pci_map_sg: Unable to allocate anymore 32Bits Page Map entries.\n");
+			printk(KERN_ERR "sn_pci_map_sg: Unable to allocate "
+			       "anymore 32 bit page map entries.\n");
 			BUG();
 		}
-		dma_addr = (dma_addr_t)pciio_dmamap_addr(dma_map, temp_ptr, sg->length);
-		/* printk("pci_map_sg: dma_map 0x%p Phys Addr 0x%p dma_addr 0x%p\n", dma_map, temp_ptr, dma_addr); */
+		dma_addr = pciio_dmamap_addr(dma_map, phys_addr, sg->length);
 		sg->address = (char *)dma_addr;
 		sg->page = (char *)dma_map;
 		
@@ -372,7 +372,17 @@ sn1_pci_unmap_sg (struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int
 
 }
 
-/*
+/**
+ * sn_pci_map_single - map a single region for DMA
+ * @hwdev: device to map for
+ * @ptr: kernel virtual address of the region to map
+ * @size: size of the region
+ * @direction: DMA direction
+ *
+ * Map the region pointed to by @ptr for DMA and return the
+ * DMA address.   Also known as platform_pci_map_single() by
+ * the IA64 machvec code.
+ *
  * We map this to the one step pciio_dmamap_trans interface rather than
  * the two step pciio_dmamap_alloc/pciio_dmamap_addr because we have
  * no way of saving the dmamap handle from the alloc to later free

include/asm-ia64/machvec.h

@@ -18,6 +18,7 @@ struct pci_dev;
 struct pt_regs;
 struct scatterlist;
 struct irq_desc;
+struct page;
 
 typedef void ia64_mv_setup_t (char **);
 typedef void ia64_mv_cpu_init_t(void);
@@ -45,6 +46,8 @@ typedef void ia64_mv_pci_unmap_sg (struct pci_dev *, struct scatterlist *, int,
 typedef void ia64_mv_pci_dma_sync_single (struct pci_dev *, dma_addr_t, size_t, int);
 typedef void ia64_mv_pci_dma_sync_sg (struct pci_dev *, struct scatterlist *, int, int);
 typedef unsigned long ia64_mv_pci_dma_address (struct scatterlist *);
+typedef int ia64_mv_pci_dma_supported (struct pci_dev *, u64);
+
 /*
  * WARNING: The legacy I/O space is _architected_.  Platforms are
  * expected to follow this architected model (see Section 10.7 in the
@@ -101,6 +104,7 @@ extern void machvec_noop (void);
 #  define platform_pci_dma_sync_single	ia64_mv.sync_single
 #  define platform_pci_dma_sync_sg	ia64_mv.sync_sg
 #  define platform_pci_dma_address	ia64_mv.dma_address
+#  define platform_pci_dma_supported	ia64_mv.dma_supported
 #  define platform_irq_desc		ia64_mv.irq_desc
 #  define platform_irq_to_vector	ia64_mv.irq_to_vector
 #  define platform_local_vector_to_irq	ia64_mv.local_vector_to_irq
@@ -136,6 +140,7 @@ struct ia64_machine_vector {
 	ia64_mv_pci_dma_sync_single *sync_single;
 	ia64_mv_pci_dma_sync_sg *sync_sg;
 	ia64_mv_pci_dma_address *dma_address;
+	ia64_mv_pci_dma_supported *dma_supported;
 	ia64_mv_irq_desc *irq_desc;
 	ia64_mv_irq_to_vector *irq_to_vector;
 	ia64_mv_local_vector_to_irq *local_vector_to_irq;
@@ -172,6 +177,7 @@ struct ia64_machine_vector {
 	platform_pci_dma_sync_single,		\
 	platform_pci_dma_sync_sg,		\
 	platform_pci_dma_address,		\
+	platform_pci_dma_supported,		\
 	platform_irq_desc,			\
 	platform_irq_to_vector,			\
 	platform_local_vector_to_irq,		\
@@ -269,6 +275,9 @@ extern ia64_mv_pci_dma_address swiotlb_dma_address;
 #ifndef platform_pci_dma_address
 # define  platform_pci_dma_address	swiotlb_dma_address
 #endif
+#ifndef platform_pci_dma_supported
+# define  platform_pci_dma_supported	swiotlb_pci_dma_supported
+#endif
 #ifndef platform_irq_desc
 # define platform_irq_desc		__ia64_irq_desc
 #endif

include/asm-ia64/machvec_hpzx1.h

@@ -11,6 +11,7 @@ extern ia64_mv_pci_unmap_single sba_unmap_single;
 extern ia64_mv_pci_map_sg sba_map_sg;
 extern ia64_mv_pci_unmap_sg sba_unmap_sg;
 extern ia64_mv_pci_dma_address sba_dma_address;
+extern ia64_mv_pci_dma_supported sba_dma_supported;
 
 /*
  * This stuff has dual use!
@@ -33,42 +34,6 @@ extern ia64_mv_pci_dma_address sba_dma_address;
 #define platform_pci_dma_sync_single	((ia64_mv_pci_dma_sync_single *) machvec_noop)
 #define platform_pci_dma_sync_sg	((ia64_mv_pci_dma_sync_sg *) machvec_noop)
 #define platform_pci_dma_address	sba_dma_address
-
-#endif /* _ASM_IA64_MACHVEC_HPZX1_h */
-#ifndef _ASM_IA64_MACHVEC_HPZX1_h
-#define _ASM_IA64_MACHVEC_HPZX1_h
-
-extern ia64_mv_setup_t dig_setup;
-extern ia64_mv_pci_fixup_t hpzx1_pci_fixup;
-extern ia64_mv_map_nr_t map_nr_dense;
-extern ia64_mv_pci_alloc_consistent sba_alloc_consistent;
-extern ia64_mv_pci_free_consistent sba_free_consistent;
-extern ia64_mv_pci_map_single sba_map_single;
-extern ia64_mv_pci_unmap_single sba_unmap_single;
-extern ia64_mv_pci_map_sg sba_map_sg;
-extern ia64_mv_pci_unmap_sg sba_unmap_sg;
-extern ia64_mv_pci_dma_address sba_dma_address;
-
-/*
- * This stuff has dual use!
- *
- * For a generic kernel, the macros are used to initialize the
- * platform's machvec structure.  When compiling a non-generic kernel,
- * the macros are used directly.
- */
-#define platform_name			"hpzx1"
-#define platform_setup			dig_setup
-#define platform_pci_fixup		hpzx1_pci_fixup
-#define platform_map_nr			map_nr_dense
-#define platform_pci_dma_init		((ia64_mv_pci_dma_init *) machvec_noop)
-#define platform_pci_alloc_consistent	sba_alloc_consistent
-#define platform_pci_free_consistent	sba_free_consistent
-#define platform_pci_map_single		sba_map_single
-#define platform_pci_unmap_single	sba_unmap_single
-#define platform_pci_map_sg		sba_map_sg
-#define platform_pci_unmap_sg		sba_unmap_sg
-#define platform_pci_dma_sync_single	((ia64_mv_pci_dma_sync_single *) machvec_noop)
-#define platform_pci_dma_sync_sg	((ia64_mv_pci_dma_sync_sg *) machvec_noop)
-#define platform_pci_dma_address	sba_dma_address
+#define platform_pci_dma_supported	sba_dma_supported
 
 #endif /* _ASM_IA64_MACHVEC_HPZX1_h */

include/asm-ia64/pci.h

@@ -58,6 +58,7 @@ pcibios_penalize_isa_irq (int irq)
 #define pci_dma_sync_single		platform_pci_dma_sync_single
 #define pci_dma_sync_sg			platform_pci_dma_sync_sg
 #define sg_dma_address			platform_pci_dma_address
+#define pci_dma_supported		platform_pci_dma_supported
 
 /* pci_unmap_{single,page} is not a nop, thus... */
 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)	\
@@ -73,17 +74,6 @@ pcibios_penalize_isa_irq (int irq)
 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)		\
 	(((PTR)->LEN_NAME) = (VAL))
 
-/*
- * Return whether the given PCI device DMA address mask can be supported properly.  For
- * example, if your device can only drive the low 24-bits during PCI bus mastering, then
- * you would pass 0x00ffffff as the mask to this function.
- */
-static inline int
-pci_dma_supported (struct pci_dev *hwdev, u64 mask)
-{
-	return 1;
-}
-
 #define pci_map_page(dev,pg,off,size,dir)				\
 	pci_map_single((dev), page_address(pg) + (off), (size), (dir))
 #define pci_unmap_page(dev,dma_addr,size,dir)				\