PNPACPI: add bus number support
Add support for bus number resources. This is for bridges with a range of
bus numbers behind them. Previously, PNP ignored bus number resources.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index 0b8d140..0bab84e 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -166,6 +166,9 @@
struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
resource_size_t start,
resource_size_t end, int flags);
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end);
extern int pnp_debug;
diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
index ba437b7..cfaf5b7 100644
--- a/drivers/pnp/interface.c
+++ b/drivers/pnp/interface.c
@@ -278,6 +278,7 @@
switch (pnp_resource_type(res)) {
case IORESOURCE_IO:
case IORESOURCE_MEM:
+ case IORESOURCE_BUS:
pnp_printf(buffer, " %#llx-%#llx%s\n",
(unsigned long long) res->start,
(unsigned long long) res->end,
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 0d7d61d..54514aa3 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -265,6 +265,14 @@
pnp_add_mem_resource(dev, start, end, flags);
}
+static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
+ u64 start, u64 len)
+{
+ u64 end = start + len - 1;
+
+ pnp_add_bus_resource(dev, start, end);
+}
+
static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
struct acpi_resource *res)
{
@@ -290,6 +298,9 @@
p->minimum, p->address_length,
p->granularity == 0xfff ? ACPI_DECODE_10 :
ACPI_DECODE_16, window);
+ else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+ pnpacpi_parse_allocated_busresource(dev, p->minimum,
+ p->address_length);
}
static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
@@ -309,6 +320,9 @@
p->minimum, p->address_length,
p->granularity == 0xfff ? ACPI_DECODE_10 :
ACPI_DECODE_16, window);
+ else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+ pnpacpi_parse_allocated_busresource(dev, p->minimum,
+ p->address_length);
}
static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index 64d0596..5b277db 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -470,7 +470,8 @@
unsigned long pnp_resource_type(struct resource *res)
{
return res->flags & (IORESOURCE_IO | IORESOURCE_MEM |
- IORESOURCE_IRQ | IORESOURCE_DMA);
+ IORESOURCE_IRQ | IORESOURCE_DMA |
+ IORESOURCE_BUS);
}
struct resource *pnp_get_resource(struct pnp_dev *dev,
@@ -590,6 +591,30 @@
return pnp_res;
}
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
+ (unsigned long long) start,
+ (unsigned long long) end);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_BUS;
+ res->start = start;
+ res->end = end;
+
+ pnp_dbg(&dev->dev, " add %pr\n", res);
+ return pnp_res;
+}
+
/*
* Determine whether the specified resource is a possible configuration
* for this device.
diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c
index 9585c1c..f5beb24 100644
--- a/drivers/pnp/support.c
+++ b/drivers/pnp/support.c
@@ -69,8 +69,10 @@
return "irq";
case IORESOURCE_DMA:
return "dma";
+ case IORESOURCE_BUS:
+ return "bus";
}
- return NULL;
+ return "unknown";
}
void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)