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@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