drivers/pci: Create pci_map_bar function
It is no longer always true that the pci bus address can be
used as the virtual address for pci accesses. pci_map_bar()
is created to return the virtual address for a pci region.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
diff --git a/include/pci.h b/include/pci.h
index 35ff1e9..d0594e3 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -454,10 +454,29 @@
#define pci_bus_to_phys(dev, addr, flags) \
pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
-#define pci_phys_to_mem(dev, addr) pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
-#define pci_mem_to_phys(dev, addr) pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
-#define pci_phys_to_io(dev, addr) pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
-#define pci_io_to_phys(dev, addr) pci_bus_to_phys((dev), (addr), PCI_REGION_IO)
+#define pci_virt_to_bus(dev, addr, flags) \
+ pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), \
+ (virt_to_phys(addr)), (flags))
+#define pci_bus_to_virt(dev, addr, flags, len, map_flags) \
+ map_physmem(pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), \
+ (addr), (flags)), \
+ (len), (map_flags))
+
+#define pci_phys_to_mem(dev, addr) \
+ pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
+#define pci_mem_to_phys(dev, addr) \
+ pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
+#define pci_phys_to_io(dev, addr) pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
+#define pci_io_to_phys(dev, addr) pci_bus_to_phys((dev), (addr), PCI_REGION_IO)
+
+#define pci_virt_to_mem(dev, addr) \
+ pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
+#define pci_mem_to_virt(dev, addr, len, map_flags) \
+ pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
+#define pci_virt_to_io(dev, addr) \
+ pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
+#define pci_io_to_virt(dev, addr, len, map_flags) \
+ pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))
extern int pci_hose_read_config_byte(struct pci_controller *hose,
pci_dev_t dev, int where, u8 *val);
@@ -488,6 +507,7 @@
extern int pci_hose_write_config_word_via_dword(struct pci_controller *hose,
pci_dev_t dev, int where, u16 val);
+extern void *pci_map_bar(pci_dev_t pdev, int bar, int flags);
extern void pci_register_hose(struct pci_controller* hose);
extern struct pci_controller* pci_bus_to_hose(int bus);