[U-Boot] [PATCH 17/25] dm: pci: Add driver model API functions for address mapping

[Simon Glass]

At present the PCI address map functions use the old API. Add new functions
for this so that drivers can be converted.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 drivers/pci/pci-uclass.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++
 include/pci.h            | 59 ++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+)

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 4e37972..9c54e6c 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -11,6 +11,7 @@
 #include <fdtdec.h>
 #include <inttypes.h>
 #include <pci.h>
+#include <asm/io.h>
 #include <dm/lists.h>
 #include <dm/root.h>
 #include <dm/device-internal.h>
@@ -1066,6 +1067,87 @@ u32 dm_pci_read_bar32(struct udevice *dev, int barnum)
 		return addr & PCI_BASE_ADDRESS_MEM_MASK;
 }
 
+static int _dm_pci_hose_bus_to_phys(struct udevice *ctlr,
+				    pci_addr_t bus_addr, unsigned long flags,
+				    unsigned long skip_mask, phys_addr_t *pa)
+{
+	struct pci_controller *hose = dev_get_uclass_priv(ctlr);
+	struct pci_region *res;
+	int i;
+
+	for (i = 0; i < hose->region_count; i++) {
+		res = &hose->regions[i];
+
+		if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
+			continue;
+
+		if (res->flags & skip_mask)
+			continue;
+
+		if (bus_addr >= res->bus_start &&
+		    (bus_addr - res->bus_start) < res->size) {
+			*pa = (bus_addr - res->bus_start + res->phys_start);
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t bus_addr,
+			       unsigned long flags)
+{
+	phys_addr_t phys_addr = 0;
+	struct udevice *ctlr;
+	int ret;
+
+	/* The root controller has the region information */
+	ctlr = pci_get_controller(dev);
+
+	/*
+	 * if PCI_REGION_MEM is set we do a two pass search with preference
+	 * on matches that don't have PCI_REGION_SYS_MEMORY set
+	 */
+	if ((flags & PCI_REGION_TYPE) == PCI_REGION_MEM) {
+		ret = _dm_pci_hose_bus_to_phys(ctlr, bus_addr,
+					       flags, PCI_REGION_SYS_MEMORY,
+					       &phys_addr);
+		if (!ret)
+			return phys_addr;
+	}
+
+	ret = _dm_pci_hose_bus_to_phys(ctlr, bus_addr, flags, 0, &phys_addr);
+
+	if (ret)
+		puts("pci_hose_bus_to_phys: invalid physical address\n");
+
+	return phys_addr;
+}
+
+pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr,
+			      unsigned long flags)
+{
+	return 0;
+}
+
+void *dm_pci_map_bar(struct udevice *dev, int bar, int flags)
+{
+	pci_addr_t pci_bus_addr;
+	u32 bar_response;
+
+	/* read BAR address */
+	dm_pci_read_config32(dev, bar, &bar_response);
+	pci_bus_addr = (pci_addr_t)(bar_response & ~0xf);
+
+	/*
+	 * Pass "0" as the length argument to pci_bus_to_virt.  The arg
+	 * isn't actualy used on any platform because u-boot assumes a static
+	 * linear mapping.  In the future, this could read the BAR size
+	 * and pass that as the size if needed.
+	 */
+	return dm_pci_bus_to_virt(dev, pci_bus_addr, flags, 0, MAP_NOCACHE);
+}
+
 UCLASS_DRIVER(pci) = {
 	.id		= UCLASS_PCI,
 	.name		= "pci",
diff --git a/include/pci.h b/include/pci.h
index f1c0d71..ddf6b66 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -1183,6 +1183,65 @@ void dm_pciauto_region_init(struct pci_region *res);
 u32 dm_pci_read_bar32(struct udevice *dev, int barnum);
 
 /**
+ * dm_pci_bus_to_phys() - convert a PCI bus address to a physical address
+ *
+ * @dev:	Device containing the PCI address
+ * @addr:	PCI address to convert
+ * @flags:	Flags for the region type (PCI_REGION_...)
+ * @return physical address corresponding to that PCI bus address
+ */
+phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t addr,
+			       unsigned long flags);
+
+/**
+ * dm_pci_phys_to_bus() - convert a physical address to a PCI bus address
+ *
+ * @dev:	Device containing the bus address
+ * @addr:	Physical address to convert
+ * @flags:	Flags for the region type (PCI_REGION_...)
+ * @return PCI bus address corresponding to that physical address
+ */
+pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr,
+			      unsigned long flags);
+
+/**
+ * dm_pci_map_bar() - get a physical address associated with a BAR region
+ *
+ * Looks up a base address register and finds the physical memory address
+ * that corresponds to it
+ *
+ * @dev:	Device to check
+ * @bar:	Bar number to read (numbered from 0)
+ * @flags:	Flags for the region type (PCI_REGION_...)
+ * @return: pointer to the physical address to use
+ */
+void *dm_pci_map_bar(struct udevice *dev, int bar, int flags);
+
+#define dm_pci_virt_to_bus(dev, addr, flags) \
+	dm_pci_phys_to_bus(dev, (virt_to_phys(addr)), (flags))
+#define dm_pci_bus_to_virt(dev, addr, flags, len, map_flags) \
+	map_physmem(dm_pci_bus_to_phys(dev, (addr), (flags)), \
+		    (len), (map_flags))
+
+#define dm_pci_phys_to_mem(dev, addr) \
+	dm_pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
+#define dm_pci_mem_to_phys(dev, addr) \
+	dm_pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
+#define dm_pci_phys_to_io(dev, addr) \
+	dm_pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
+#define dm_pci_io_to_phys(dev, addr) \
+	dm_pci_bus_to_phys((dev), (addr), PCI_REGION_IO)
+
+#define dm_pci_virt_to_mem(dev, addr) \
+	dm_pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
+#define dm_pci_mem_to_virt(dev, addr, len, map_flags) \
+	dm_pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
+#define dm_pci_virt_to_io(dev, addr) \
+	dm_dm_pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
+#define dm_pci_io_to_virt(dev, addr, len, map_flags) \
+	dm_dm_pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))
+
+/**
  * dm_pci_find_device() - find a device by vendor/device ID
  *
  * @vendor:	Vendor ID
-- 
2.6.0.rc2.230.g3dd15c0