X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fpowerpc%2Fsysdev%2Fdart_iommu.c;h=e0e24b01e3a61c5138ff110e40c3a66c219ffa36;hb=26f6cb999366a71b8e318bceaf8fafc1ffecae40;hp=572b7846cc77226870784995534d98ea794bd979;hpb=1b7f6a626f0ff511c3840678466cbfe1d62c0b29;p=linux-2.6

diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index 572b7846cc..e0e24b01e3 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -36,6 +36,7 @@
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <linux/vmalloc.h>
+#include <linux/suspend.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/iommu.h>
@@ -48,15 +49,15 @@
 
 #include "dart.h"
 
-extern int iommu_is_off;
-extern int iommu_force_on;
-
 /* Physical base address and size of the DART table */
 unsigned long dart_tablebase; /* exported to htab_initialize */
 static unsigned long dart_tablesize;
 
 /* Virtual base address of the DART table */
 static u32 *dart_vbase;
+#ifdef CONFIG_PM
+static u32 *dart_copy;
+#endif
 
 /* Mapped base address for the dart */
 static unsigned int __iomem *dart;
@@ -203,7 +204,7 @@ static void dart_free(struct iommu_table *tbl, long index, long npages)
 }
 
 
-static int dart_init(struct device_node *dart_node)
+static int __init dart_init(struct device_node *dart_node)
 {
 	unsigned int i;
 	unsigned long tmp, base, size;
@@ -289,24 +290,15 @@ static void iommu_table_dart_setup(void)
 	set_bit(iommu_table_dart.it_size - 1, iommu_table_dart.it_map);
 }
 
-static void iommu_dev_setup_dart(struct pci_dev *dev)
+static void pci_dma_dev_setup_dart(struct pci_dev *dev)
 {
-	struct device_node *dn;
-
 	/* We only have one iommu table on the mac for now, which makes
 	 * things simple. Setup all PCI devices to point to this table
-	 *
-	 * We must use pci_device_to_OF_node() to make sure that
-	 * we get the real "final" pointer to the device in the
-	 * pci_dev sysdata and not the temporary PHB one
 	 */
-	dn = pci_device_to_OF_node(dev);
-
-	if (dn)
-		PCI_DN(dn)->iommu_table = &iommu_table_dart;
+	dev->dev.archdata.dma_data = &iommu_table_dart;
 }
 
-static void iommu_bus_setup_dart(struct pci_bus *bus)
+static void pci_dma_bus_setup_dart(struct pci_bus *bus)
 {
 	struct device_node *dn;
 
@@ -321,10 +313,7 @@ static void iommu_bus_setup_dart(struct pci_bus *bus)
 		PCI_DN(dn)->iommu_table = &iommu_table_dart;
 }
 
-static void iommu_dev_setup_null(struct pci_dev *dev) { }
-static void iommu_bus_setup_null(struct pci_bus *bus) { }
-
-void iommu_init_early_dart(void)
+void __init iommu_init_early_dart(void)
 {
 	struct device_node *dn;
 
@@ -344,24 +333,65 @@ void iommu_init_early_dart(void)
 
 	/* Initialize the DART HW */
 	if (dart_init(dn) == 0) {
-		ppc_md.iommu_dev_setup = iommu_dev_setup_dart;
-		ppc_md.iommu_bus_setup = iommu_bus_setup_dart;
+		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_dart;
+		ppc_md.pci_dma_bus_setup = pci_dma_bus_setup_dart;
 
 		/* Setup pci_dma ops */
-		pci_iommu_init();
-
+		set_pci_dma_ops(&dma_iommu_ops);
 		return;
 	}
 
  bail:
 	/* If init failed, use direct iommu and null setup functions */
-	ppc_md.iommu_dev_setup = iommu_dev_setup_null;
-	ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+	ppc_md.pci_dma_dev_setup = NULL;
+	ppc_md.pci_dma_bus_setup = NULL;
 
 	/* Setup pci_dma ops */
-	pci_direct_iommu_init();
+	set_pci_dma_ops(&dma_direct_ops);
+}
+
+#ifdef CONFIG_PM
+static void iommu_dart_save(void)
+{
+	memcpy(dart_copy, dart_vbase, 2*1024*1024);
+}
+
+static void iommu_dart_restore(void)
+{
+	memcpy(dart_vbase, dart_copy, 2*1024*1024);
+	dart_tlb_invalidate_all();
+}
+
+static int __init iommu_init_late_dart(void)
+{
+	unsigned long tbasepfn;
+	struct page *p;
+
+	/* if no dart table exists then we won't need to save it
+	 * and the area has also not been reserved */
+	if (!dart_tablebase)
+		return 0;
+
+	tbasepfn = __pa(dart_tablebase) >> PAGE_SHIFT;
+	register_nosave_region_late(tbasepfn,
+				    tbasepfn + ((1<<24) >> PAGE_SHIFT));
+
+	/* For suspend we need to copy the dart contents because
+	 * it is not part of the regular mapping (see above) and
+	 * thus not saved automatically. The memory for this copy
+	 * must be allocated early because we need 2 MB. */
+	p = alloc_pages(GFP_KERNEL, 21 - PAGE_SHIFT);
+	BUG_ON(!p);
+	dart_copy = page_address(p);
+
+	ppc_md.iommu_save = iommu_dart_save;
+	ppc_md.iommu_restore = iommu_dart_restore;
+
+	return 0;
 }
 
+late_initcall(iommu_init_late_dart);
+#endif
 
 void __init alloc_dart_table(void)
 {