[IA64] add the MMIO regions that are translated to I/O port space to /proc/iomem
ia64 translates normal loads and stores to special MMIO regions into I/O port
accesses. Reserve these special MMIO regions in /proc/iomem.
Sample /proc/iomem:
f8100000000-f81003fffff : PCI Bus 0000:80 I/O Ports 00000000-00000fff
f8100400000-f81007fffff : PCI Bus 0000:8e I/O Ports 00001000-00001fff
f8100800000-f8100ffffff : PCI Bus 0000:9c I/O Ports 00002000-00003fff
f8101000000-f81017fffff : PCI Bus 0000:aa I/O Ports 00004000-00005fff
and corresponding /proc/ioports:
00000000-00000fff : PCI Bus 0000:80
00001000-00001fff : PCI Bus 0000:8e
00002000-00003fff : PCI Bus 0000:9c
00004000-00005fff : PCI Bus 0000:aa
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 017cfc3..20d76fa 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -95,7 +95,7 @@
}
static struct pci_raw_ops pci_sal_ops = {
- .read = pci_sal_read,
+ .read = pci_sal_read,
.write = pci_sal_write
};
@@ -137,35 +137,98 @@
return controller;
}
-static u64 __devinit
-add_io_space (struct acpi_resource_address64 *addr)
+struct pci_root_info {
+ struct pci_controller *controller;
+ char *name;
+};
+
+static unsigned int
+new_space (u64 phys_base, int sparse)
{
- u64 offset;
- int sparse = 0;
+ u64 mmio_base;
int i;
- if (addr->address_translation_offset == 0)
- return IO_SPACE_BASE(0); /* part of legacy IO space */
+ if (phys_base == 0)
+ return 0; /* legacy I/O port space */
- if (addr->attribute.io.translation_attribute == ACPI_SPARSE_TRANSLATION)
- sparse = 1;
-
- offset = (u64) ioremap(addr->address_translation_offset, 0);
+ mmio_base = (u64) ioremap(phys_base, 0);
for (i = 0; i < num_io_spaces; i++)
- if (io_space[i].mmio_base == offset &&
+ if (io_space[i].mmio_base == mmio_base &&
io_space[i].sparse == sparse)
- return IO_SPACE_BASE(i);
+ return i;
if (num_io_spaces == MAX_IO_SPACES) {
- printk("Too many IO port spaces\n");
+ printk(KERN_ERR "PCI: Too many IO port spaces "
+ "(MAX_IO_SPACES=%lu)\n", MAX_IO_SPACES);
return ~0;
}
i = num_io_spaces++;
- io_space[i].mmio_base = offset;
+ io_space[i].mmio_base = mmio_base;
io_space[i].sparse = sparse;
- return IO_SPACE_BASE(i);
+ return i;
+}
+
+static u64 __devinit
+add_io_space (struct pci_root_info *info, struct acpi_resource_address64 *addr)
+{
+ struct resource *resource;
+ char *name;
+ u64 base, min, max, base_port;
+ unsigned int sparse = 0, space_nr, len;
+
+ resource = kzalloc(sizeof(*resource), GFP_KERNEL);
+ if (!resource) {
+ printk(KERN_ERR "PCI: No memory for %s I/O port space\n",
+ info->name);
+ goto out;
+ }
+
+ len = strlen(info->name) + 32;
+ name = kzalloc(len, GFP_KERNEL);
+ if (!name) {
+ printk(KERN_ERR "PCI: No memory for %s I/O port space name\n",
+ info->name);
+ goto free_resource;
+ }
+
+ min = addr->min_address_range;
+ max = min + addr->address_length - 1;
+ if (addr->attribute.io.translation_attribute == ACPI_SPARSE_TRANSLATION)
+ sparse = 1;
+
+ space_nr = new_space(addr->address_translation_offset, sparse);
+ if (space_nr == ~0)
+ goto free_name;
+
+ base = __pa(io_space[space_nr].mmio_base);
+ base_port = IO_SPACE_BASE(space_nr);
+ snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->name,
+ base_port + min, base_port + max);
+
+ /*
+ * The SDM guarantees the legacy 0-64K space is sparse, but if the
+ * mapping is done by the processor (not the bridge), ACPI may not
+ * mark it as sparse.
+ */
+ if (space_nr == 0)
+ sparse = 1;
+
+ resource->name = name;
+ resource->flags = IORESOURCE_MEM;
+ resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
+ resource->end = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max);
+ insert_resource(&iomem_resource, resource);
+
+ return base_port;
+
+free_name:
+ kfree(name);
+free_resource:
+ kfree(resource);
+out:
+ return ~0;
}
static acpi_status __devinit resource_to_window(struct acpi_resource *resource,
@@ -205,11 +268,6 @@
return AE_OK;
}
-struct pci_root_info {
- struct pci_controller *controller;
- char *name;
-};
-
static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
{
struct pci_root_info *info = data;
@@ -231,7 +289,7 @@
} else if (addr.resource_type == ACPI_IO_RANGE) {
flags = IORESOURCE_IO;
root = &ioport_resource;
- offset = add_io_space(&addr);
+ offset = add_io_space(info, &addr);
if (offset == ~0)
return AE_OK;
} else
@@ -241,7 +299,7 @@
window->resource.name = info->name;
window->resource.flags = flags;
window->resource.start = addr.min_address_range + offset;
- window->resource.end = addr.max_address_range + offset;
+ window->resource.end = window->resource.start + addr.address_length - 1;
window->resource.child = NULL;
window->offset = offset;
@@ -739,7 +797,7 @@
{
int count = nr_released;
- count += (IA64_LAST_DEVICE_VECTOR - last);
+ count += (IA64_LAST_DEVICE_VECTOR - last);
return count;
}