[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>

1 files changed, 82 insertions, 24 deletions

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 017cfc3f4789..20d76fae24e8 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -95,7 +95,7 @@ pci_sal_write (unsigned int seg, unsigned int bus, unsigned int devfn,
 }
 
 static struct pci_raw_ops pci_sal_ops = {
-        .read =         pci_sal_read,
+        .read =         pci_sal_read,
         .write =        pci_sal_write
 };
 
@@ -137,35 +137,98 @@ alloc_pci_controller (int seg)
         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 (addr->attribute.io.translation_attribute == ACPI_SPARSE_TRANSLATION)
-                sparse = 1;
+        if (phys_base == 0)
+                return 0;       /* legacy I/O port space */
 
-        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 @@ count_window (struct acpi_resource *resource, void *data)
         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 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
         } 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 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
         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 pci_vector_resources(int last, int nr_released)
 {
         int count = nr_released;
 
-        count += (IA64_LAST_DEVICE_VECTOR - last);
+        count += (IA64_LAST_DEVICE_VECTOR - last);
 
         return count;
 }