[SPARC64]: First cut at SUN4V PCI IOMMU handling.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/pci_iommu.c

@@ -562,9 +562,9 @@ static int pci_4u_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int n
 	/* Fast path single entry scatterlists. */
 	if (nelems == 1) {
 		sglist->dma_address =
-			pci_map_single(pdev,
-				       (page_address(sglist->page) + sglist->offset),
-				       sglist->length, direction);
+			pci_4u_map_single(pdev,
+					  (page_address(sglist->page) + sglist->offset),
+					  sglist->length, direction);
 		if (unlikely(sglist->dma_address == PCI_DMA_ERROR_CODE))
 			return 0;
 		sglist->dma_length = sglist->length;

arch/sparc64/kernel/pci_sun4v.h

@@ -16,6 +16,10 @@ extern unsigned long pci_sun4v_iommu_map(unsigned long devhandle,
 extern unsigned long pci_sun4v_iommu_demap(unsigned long devhandle,
 					   unsigned long tsbid,
 					   unsigned long num_ttes);
+extern unsigned long pci_sun4v_iommu_getmap(unsigned long devhandle,
+					    unsigned long tsbid,
+					    unsigned long *io_attributes,
+					    unsigned long *real_address);
 extern unsigned long pci_sun4v_config_get(unsigned long devhandle,
 					  unsigned long pci_device,
 					  unsigned long config_offset,

arch/sparc64/kernel/pci_sun4v_asm.S

@@ -12,9 +12,7 @@
 	 */
 	.globl	pci_sun4v_devino_to_sysino
 pci_sun4v_devino_to_sysino:
-	mov	%o1, %o2
-	mov	%o0, %o1
-	mov	HV_FAST_INTR_DEVINO2SYSINO, %o0
+	mov	HV_FAST_INTR_DEVINO2SYSINO, %o5
 	ta	HV_FAST_TRAP
 	retl
 	 mov	%o1, %o0
@@ -29,12 +27,7 @@ pci_sun4v_devino_to_sysino:
 	 */
 	.globl	pci_sun4v_iommu_map
 pci_sun4v_iommu_map:
-	mov	%o4, %o5
-	mov	%o3, %o4
-	mov	%o2, %o3
-	mov	%o1, %o2
-	mov	%o0, %o1
-	mov	HV_FAST_PCI_IOMMU_MAP, %o0
+	mov	HV_FAST_PCI_IOMMU_MAP, %o5
 	ta	HV_FAST_TRAP
 	retl
 	 mov	%o1, %o0
@@ -47,14 +40,28 @@ pci_sun4v_iommu_map:
 	 */
 	.globl	pci_sun4v_iommu_demap
 pci_sun4v_iommu_demap:
-	mov	%o2, %o3
-	mov	%o1, %o2
-	mov	%o0, %o1
-	mov	HV_FAST_PCI_IOMMU_DEMAP, %o0
+	mov	HV_FAST_PCI_IOMMU_DEMAP, %o5
 	ta	HV_FAST_TRAP
 	retl
 	 mov	%o1, %o0
 
+	/* %o0: devhandle
+	 * %o1:	tsbid
+	 * %o2:	&io_attributes
+	 * %o3:	&real_address
+	 *
+	 * returns %o0:	status
+	 */
+	.globl	pci_sun4v_iommu_getmap
+pci_sun4v_iommu_getmap:
+	mov	%o2, %o4
+	mov	HV_FAST_PCI_IOMMU_GETMAP, %o5
+	ta	HV_FAST_TRAP
+	stx	%o1, [%o4]
+	stx	%o2, [%o3]
+	retl
+	 mov	%o0, %o0
+
 	/* %o0: devhandle
 	 * %o1:	pci_device
 	 * %o2:	pci_config_offset
@@ -67,11 +74,7 @@ pci_sun4v_iommu_demap:
 	 */
 	.globl	pci_sun4v_config_get
 pci_sun4v_config_get:
-	mov	%o3, %o4
-	mov	%o2, %o3
-	mov	%o1, %o2
-	mov	%o0, %o1
-	mov	HV_FAST_PCI_CONFIG_GET, %o0
+	mov	HV_FAST_PCI_CONFIG_GET, %o5
 	ta	HV_FAST_TRAP
 	brnz,a,pn %o1, 1f
 	 mov	-1, %o2
@@ -91,14 +94,9 @@ pci_sun4v_config_get:
 	 */
 	.globl	pci_sun4v_config_put
 pci_sun4v_config_put:
-	mov	%o3, %o4
-	mov	%o2, %o3
-	mov	%o1, %o2
-	mov	%o0, %o1
-	mov	HV_FAST_PCI_CONFIG_PUT, %o0
+	mov	HV_FAST_PCI_CONFIG_PUT, %o5
 	ta	HV_FAST_TRAP
 	brnz,a,pn %o1, 1f
 	 mov	-1, %o1
 1:	retl
 	 mov	%o1, %o0
-