static unsigned int dart_emptyval;
static struct iommu_table iommu_table_u3;
+static int iommu_table_u3_inited;
static int dart_dirty;
#define DBG(...)
unsigned int regword;
unsigned int i;
unsigned long tmp;
- struct page *p;
if (dart_tablebase == 0 || dart_tablesize == 0) {
printk(KERN_INFO "U3-DART: table not allocated, using direct DMA\n");
* that to work around what looks like a problem with the HT bridge
* prefetching into invalid pages and corrupting data
*/
- tmp = __get_free_pages(GFP_ATOMIC, 1);
- if (tmp == 0)
- panic("U3-DART: Cannot allocate spare page !");
- dart_emptyval = DARTMAP_VALID |
- ((virt_to_abs(tmp) >> PAGE_SHIFT) & DARTMAP_RPNMASK);
+ tmp = lmb_alloc(PAGE_SIZE, PAGE_SIZE);
+ if (!tmp)
+ panic("U3-DART: Cannot allocate spare page!");
+ dart_emptyval = DARTMAP_VALID | ((tmp >> PAGE_SHIFT) & DARTMAP_RPNMASK);
/* Map in DART registers. FIXME: Use device node to get base address */
dart = ioremap(DART_BASE, 0x7000);
if (dart == NULL)
- panic("U3-DART: Cannot map registers !");
+ panic("U3-DART: Cannot map registers!");
/* Set initial control register contents: table base,
* table size and enable bit
((dart_tablebase >> PAGE_SHIFT) << DARTCNTL_BASE_SHIFT) |
(((dart_tablesize >> PAGE_SHIFT) & DARTCNTL_SIZE_MASK)
<< DARTCNTL_SIZE_SHIFT);
- p = virt_to_page(dart_tablebase);
dart_vbase = ioremap(virt_to_abs(dart_tablebase), dart_tablesize);
/* Fill initial table */
/* Invalidate DART to get rid of possible stale TLBs */
dart_tlb_invalidate_all();
+ printk(KERN_INFO "U3/CPC925 DART IOMMU initialized\n");
+
+ return 0;
+}
+
+static void iommu_table_u3_setup(void)
+{
iommu_table_u3.it_busno = 0;
-
- /* Units of tce entries */
iommu_table_u3.it_offset = 0;
-
- /* Set the tce table size - measured in pages */
- iommu_table_u3.it_size = dart_tablesize >> PAGE_SHIFT;
+ /* it_size is in number of entries */
+ iommu_table_u3.it_size = dart_tablesize / sizeof(u32);
/* Initialize the common IOMMU code */
iommu_table_u3.it_base = (unsigned long)dart_vbase;
iommu_table_u3.it_index = 0;
iommu_table_u3.it_blocksize = 1;
- iommu_table_u3.it_entrysize = sizeof(u32);
iommu_init_table(&iommu_table_u3);
/* Reserve the last page of the DART to avoid possible prefetch
* past the DART mapped area
*/
- set_bit(iommu_table_u3.it_mapsize - 1, iommu_table_u3.it_map);
+ set_bit(iommu_table_u3.it_size - 1, iommu_table_u3.it_map);
+}
- printk(KERN_INFO "U3/CPC925 DART IOMMU initialized\n");
+static void iommu_dev_setup_u3(struct pci_dev *dev)
+{
+ struct device_node *dn;
- return 0;
+ /* 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)
+ dn->iommu_table = &iommu_table_u3;
}
-void iommu_setup_u3(void)
+static void iommu_bus_setup_u3(struct pci_bus *bus)
+{
+ struct device_node *dn;
+
+ if (!iommu_table_u3_inited) {
+ iommu_table_u3_inited = 1;
+ iommu_table_u3_setup();
+ }
+
+ dn = pci_bus_to_OF_node(bus);
+
+ if (dn)
+ dn->iommu_table = &iommu_table_u3;
+}
+
+static void iommu_dev_setup_null(struct pci_dev *dev) { }
+static void iommu_bus_setup_null(struct pci_bus *bus) { }
+
+void iommu_init_early_u3(void)
{
- struct pci_dev *dev = NULL;
struct device_node *dn;
/* Find the DART in the device-tree */
ppc_md.tce_flush = dart_flush;
/* Initialize the DART HW */
- if (dart_init(dn))
- return;
-
- /* Setup pci_dma ops */
- pci_iommu_init();
-
- /* We only have one iommu table on the mac for now, which makes
- * things simple. Setup all PCI devices to point to this table
- */
- while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- /* 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
- */
- struct device_node *dn = pci_device_to_OF_node(dev);
- if (dn)
- dn->iommu_table = &iommu_table_u3;
+ if (dart_init(dn)) {
+ /* 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;
+
+ /* Setup pci_dma ops */
+ pci_direct_iommu_init();
+ } else {
+ ppc_md.iommu_dev_setup = iommu_dev_setup_u3;
+ ppc_md.iommu_bus_setup = iommu_bus_setup_u3;
+
+ /* Setup pci_dma ops */
+ pci_iommu_init();
}
}
+
void __init alloc_u3_dart_table(void)
{
/* Only reserve DART space if machine has more than 2GB of RAM
git://git.onelab.eu / linux-2.6.git / blobdiff