2 files changed, 78 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index edbf79465d50..a7b2a600d0a4 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -1,7 +1,7 @@
 /*
  * MPC83xx/85xx/86xx PCI/PCIE support routing.
  *
- * Copyright 2007-2011 Freescale Semiconductor, Inc.
+ * Copyright 2007-2012 Freescale Semiconductor, Inc.
  * Copyright 2008-2009 MontaVista Software, Inc.
  *
  * Initial author: Xianghua Xiao <x.xiao@freescale.com>
@@ -807,3 +807,72 @@ u64 fsl_pci_immrbar_base(struct pci_controller *hose)
 
         return 0;
 }
+
+#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
+static const struct of_device_id pci_ids[] = {
+        { .compatible = "fsl,mpc8540-pci", },
+        { .compatible = "fsl,mpc8548-pcie", },
+        { .compatible = "fsl,mpc8610-pci", },
+        { .compatible = "fsl,mpc8641-pcie", },
+        { .compatible = "fsl,p1022-pcie", },
+        { .compatible = "fsl,p1010-pcie", },
+        { .compatible = "fsl,p1023-pcie", },
+        { .compatible = "fsl,p4080-pcie", },
+        { .compatible = "fsl,qoriq-pcie-v2.3", },
+        { .compatible = "fsl,qoriq-pcie-v2.2", },
+        {},
+};
+
+struct device_node *fsl_pci_primary;
+
+void __devinit fsl_pci_init(void)
+{
+        struct device_node *node;
+        struct pci_controller *hose;
+        dma_addr_t max = 0xffffffff;
+
+        /* Callers can specify the primary bus using other means. */
+        if (!fsl_pci_primary) {
+                /* If a PCI host bridge contains an ISA node, it's primary. */
+                node = of_find_node_by_type(NULL, "isa");
+                while ((fsl_pci_primary = of_get_parent(node))) {
+                        of_node_put(node);
+                        node = fsl_pci_primary;
+
+                        if (of_match_node(pci_ids, node))
+                                break;
+                }
+        }
+
+        node = NULL;
+        for_each_node_by_type(node, "pci") {
+                if (of_match_node(pci_ids, node)) {
+                        /*
+                         * If there's no PCI host bridge with ISA, arbitrarily
+                         * designate one as primary.  This can go away once
+                         * various bugs with primary-less systems are fixed.
+                         */
+                        if (!fsl_pci_primary)
+                                fsl_pci_primary = node;
+
+                        fsl_add_bridge(node, fsl_pci_primary == node);
+                        hose = pci_find_hose_for_OF_device(node);
+                        max = min(max, hose->dma_window_base_cur +
+                                        hose->dma_window_size);
+                }
+        }
+
+#ifdef CONFIG_SWIOTLB
+        /*
+         * if we couldn't map all of DRAM via the dma windows
+         * we need SWIOTLB to handle buffers located outside of
+         * dma capable memory region
+         */
+        if (memblock_end_of_DRAM() - 1 > max) {
+                ppc_swiotlb_enable = 1;
+                set_pci_dma_ops(&swiotlb_dma_ops);
+                ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
+        }
+#endif
+}
+#endif
diff --git a/arch/powerpc/sysdev/fsl_pci.h b/arch/powerpc/sysdev/fsl_pci.h
index a39ed5cc2c5a..baa0fd18289f 100644
--- a/arch/powerpc/sysdev/fsl_pci.h
+++ b/arch/powerpc/sysdev/fsl_pci.h
@@ -93,5 +93,13 @@ extern void fsl_pcibios_fixup_bus(struct pci_bus *bus);
 extern int mpc83xx_add_bridge(struct device_node *dev);
 u64 fsl_pci_immrbar_base(struct pci_controller *hose);
 
+extern struct device_node *fsl_pci_primary;
+
+#ifdef CONFIG_FSL_PCI
+void fsl_pci_init(void);
+#else
+static inline void fsl_pci_init(void) {}
+#endif
+
 #endif /* __POWERPC_FSL_PCI_H */
 #endif /* __KERNEL__ */