[PATCH 02/12][v3] pci: fsl: add structure fsl_pci

[Minghuan Lian <Minghuan.Lian@freescale.com>]

PowerPC uses structure pci_controller to describe PCI controller,
but ARM uses structure pci_sys_data. In order to support PowerPC
and ARM simultaneously, the patch adds a structure fsl_pci that
contains most of the members of the pci_controller and pci_sys_data.
Meanwhile, it defines a interface fsl_arch_sys_to_pci() which should
be implemented in architecture-specific PCI controller driver to
convert pci_controller or pci_sys_data to fsl_pci.

Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
---
change log:
v1-v3:
Derived from http://patchwork.ozlabs.org/patch/278965/

Based on upstream master.
Based on the discussion of RFC version here
http://patchwork.ozlabs.org/patch/274487/

 include/linux/fsl/pci-common.h | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/include/linux/fsl/pci-common.h b/include/linux/fsl/pci-common.h
index 5e4f683..e56a040 100644
--- a/include/linux/fsl/pci-common.h
+++ b/include/linux/fsl/pci-common.h
@@ -102,5 +102,46 @@ struct ccsr_pci {
 
 };
 
+/*
+ * Structure of a PCI controller (host bridge)
+ */
+struct fsl_pci {
+	struct list_head node;
+	bool is_pcie;
+	struct device_node *dn;
+	struct device *dev;
+
+	int first_busno;
+	int last_busno;
+	int self_busno;
+	struct resource busn;
+
+	struct pci_ops *ops;
+	struct ccsr_pci __iomem *regs;
+
+	u32 indirect_type;
+
+	struct resource io_resource;
+	resource_size_t io_base_phys;
+	resource_size_t pci_io_size;
+
+	struct resource mem_resources[3];
+	resource_size_t mem_offset[3];
+
+	int global_number;	/* PCI domain number */
+
+	resource_size_t dma_window_base_cur;
+	resource_size_t dma_window_size;
+
+	void *sys;
+};
+
+/*
+ * Convert architecture specific pci controller structure to fsl_pci
+ * PowerPC uses structure pci_controller and ARM uses structure pci_sys_data
+ * to describe pci controller.
+ */
+extern struct fsl_pci *fsl_arch_sys_to_pci(void *sys);
+
 #endif /* __PCI_COMMON_H */
 #endif /* __KERNEL__ */
-- 
1.8.1.2