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[IA64] respect ACPI producer/consumer flag for PCI root bridges 

Address space resources for ACPI devices have a producer/consumer
flag.  All devices "consume" the indicated address space.  If the
resource is marked as a "producer", the range is also passed on
to child devices.

We currently ignore this flag when setting up MMIO and I/O port
windows for PCI root bridges, so we could mistakenly interpret
a "consumed-only" range, like CSR space for the device itself,
as a window that is routed to children.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Bjorn Helgaas 2005-09-23 11:39:07 -06:00 committed by Tony Luck
parent 12f44f46bc
commit 463eb29740
1 changed files with 27 additions and 8 deletions
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35
arch/ia64/pci/pci.c
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@ -191,6 +191,29 @@ add_io_space (struct acpi_resource_address64 *addr)
return IO_SPACE_BASE(i);
}
static acpi_status __devinit resource_to_window(struct acpi_resource *resource,
struct acpi_resource_address64 *addr)
{
acpi_status status;
/*
* We're only interested in _CRS descriptors that are
* - address space descriptors for memory or I/O space
* - non-zero size
* - producers, i.e., the address space is routed downstream,
* not consumed by the bridge itself
*/
status = acpi_resource_to_address64(resource, addr);
if (ACPI_SUCCESS(status) &&
(addr->resource_type == ACPI_MEMORY_RANGE ||
addr->resource_type == ACPI_IO_RANGE) &&
addr->address_length &&
addr->producer_consumer == ACPI_PRODUCER)
return AE_OK;
return AE_ERROR;
}
static acpi_status __devinit
count_window (struct acpi_resource *resource, void *data)
{
@ -198,11 +221,9 @@ count_window (struct acpi_resource *resource, void *data)
struct acpi_resource_address64 addr;
acpi_status status;
status = acpi_resource_to_address64(resource, &addr);
status = resource_to_window(resource, &addr);
if (ACPI_SUCCESS(status))
if (addr.resource_type == ACPI_MEMORY_RANGE ||
addr.resource_type == ACPI_IO_RANGE)
(*windows)++;
(*windows)++;
return AE_OK;
}
@ -221,13 +242,11 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
unsigned long flags, offset = 0;
struct resource *root;
status = acpi_resource_to_address64(res, &addr);
/* Return AE_OK for non-window resources to keep scanning for more */
status = resource_to_window(res, &addr);
if (!ACPI_SUCCESS(status))
return AE_OK;
if (!addr.address_length)
return AE_OK;
if (addr.resource_type == ACPI_MEMORY_RANGE) {
flags = IORESOURCE_MEM;
root = &iomem_resource;