PCI, of: Move PCI I/O space management to PCI core code
No functional changes in this patch.
PCI I/O space mapping code does not depend on OF; therefore it can be moved
to PCI core code. This way we will be able to use it, e.g., in ACPI PCI
code.
Suggested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Liviu Dudau <Liviu.Dudau@arm.com>
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 91a469d..0a553c0 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -4,6 +4,7 @@
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/of_address.h>
+#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/sizes.h>
#include <linux/slab.h>
@@ -673,121 +674,6 @@
}
EXPORT_SYMBOL(of_get_address);
-#ifdef PCI_IOBASE
-struct io_range {
- struct list_head list;
- phys_addr_t start;
- resource_size_t size;
-};
-
-static LIST_HEAD(io_range_list);
-static DEFINE_SPINLOCK(io_range_lock);
-#endif
-
-/*
- * Record the PCI IO range (expressed as CPU physical address + size).
- * Return a negative value if an error has occured, zero otherwise
- */
-int __weak pci_register_io_range(phys_addr_t addr, resource_size_t size)
-{
- int err = 0;
-
-#ifdef PCI_IOBASE
- struct io_range *range;
- resource_size_t allocated_size = 0;
-
- /* check if the range hasn't been previously recorded */
- spin_lock(&io_range_lock);
- list_for_each_entry(range, &io_range_list, list) {
- if (addr >= range->start && addr + size <= range->start + size) {
- /* range already registered, bail out */
- goto end_register;
- }
- allocated_size += range->size;
- }
-
- /* range not registed yet, check for available space */
- if (allocated_size + size - 1 > IO_SPACE_LIMIT) {
- /* if it's too big check if 64K space can be reserved */
- if (allocated_size + SZ_64K - 1 > IO_SPACE_LIMIT) {
- err = -E2BIG;
- goto end_register;
- }
-
- size = SZ_64K;
- pr_warn("Requested IO range too big, new size set to 64K\n");
- }
-
- /* add the range to the list */
- range = kzalloc(sizeof(*range), GFP_ATOMIC);
- if (!range) {
- err = -ENOMEM;
- goto end_register;
- }
-
- range->start = addr;
- range->size = size;
-
- list_add_tail(&range->list, &io_range_list);
-
-end_register:
- spin_unlock(&io_range_lock);
-#endif
-
- return err;
-}
-
-phys_addr_t pci_pio_to_address(unsigned long pio)
-{
- phys_addr_t address = (phys_addr_t)OF_BAD_ADDR;
-
-#ifdef PCI_IOBASE
- struct io_range *range;
- resource_size_t allocated_size = 0;
-
- if (pio > IO_SPACE_LIMIT)
- return address;
-
- spin_lock(&io_range_lock);
- list_for_each_entry(range, &io_range_list, list) {
- if (pio >= allocated_size && pio < allocated_size + range->size) {
- address = range->start + pio - allocated_size;
- break;
- }
- allocated_size += range->size;
- }
- spin_unlock(&io_range_lock);
-#endif
-
- return address;
-}
-
-unsigned long __weak pci_address_to_pio(phys_addr_t address)
-{
-#ifdef PCI_IOBASE
- struct io_range *res;
- resource_size_t offset = 0;
- unsigned long addr = -1;
-
- spin_lock(&io_range_lock);
- list_for_each_entry(res, &io_range_list, list) {
- if (address >= res->start && address < res->start + res->size) {
- addr = address - res->start + offset;
- break;
- }
- offset += res->size;
- }
- spin_unlock(&io_range_lock);
-
- return addr;
-#else
- if (address > IO_SPACE_LIMIT)
- return (unsigned long)-1;
-
- return (unsigned long) address;
-#endif
-}
-
static int __of_address_to_resource(struct device_node *dev,
const __be32 *addrp, u64 size, unsigned int flags,
const char *name, struct resource *r)