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path: root/drivers/pnp/pnpacpi/rsparser.c
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Diffstat (limited to 'drivers/pnp/pnpacpi/rsparser.c')
-rw-r--r--drivers/pnp/pnpacpi/rsparser.c84
1 files changed, 61 insertions, 23 deletions
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 5702b2c8691f..35bb44af49b3 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -24,6 +24,7 @@
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/pnp.h>
+#include <linux/slab.h>
#include "../base.h"
#include "pnpacpi.h"
@@ -177,7 +178,8 @@ static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
}
static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
- u64 len, int io_decode)
+ u64 len, int io_decode,
+ int window)
{
int flags = 0;
u64 end = start + len - 1;
@@ -186,6 +188,8 @@ static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
flags |= IORESOURCE_IO_16BIT_ADDR;
if (len == 0 || end >= 0x10003)
flags |= IORESOURCE_DISABLED;
+ if (window)
+ flags |= IORESOURCE_WINDOW;
pnp_add_io_resource(dev, start, end, flags);
}
@@ -247,7 +251,7 @@ static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
u64 start, u64 len,
- int write_protect)
+ int write_protect, int window)
{
int flags = 0;
u64 end = start + len - 1;
@@ -256,15 +260,47 @@ static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
flags |= IORESOURCE_DISABLED;
if (write_protect == ACPI_READ_WRITE_MEMORY)
flags |= IORESOURCE_MEM_WRITEABLE;
+ if (window)
+ flags |= IORESOURCE_WINDOW;
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 u64 addr_space_length(struct pnp_dev *dev, u64 min, u64 max, u64 len)
+{
+ u64 max_len;
+
+ max_len = max - min + 1;
+ if (len <= max_len)
+ return len;
+
+ /*
+ * Per 6.4.3.5, _LEN cannot exceed _MAX - _MIN + 1, but some BIOSes
+ * don't do this correctly, e.g.,
+ * https://bugzilla.kernel.org/show_bug.cgi?id=15480
+ */
+ dev_info(&dev->dev,
+ "resource length %#llx doesn't fit in %#llx-%#llx, trimming\n",
+ (unsigned long long) len, (unsigned long long) min,
+ (unsigned long long) max);
+ return max_len;
+}
+
static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
struct acpi_resource *res)
{
struct acpi_resource_address64 addr, *p = &addr;
acpi_status status;
+ int window;
+ u64 len;
status = acpi_resource_to_address64(res, p);
if (!ACPI_SUCCESS(status)) {
@@ -273,37 +309,39 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
return;
}
- if (p->producer_consumer == ACPI_PRODUCER)
- return;
+ len = addr_space_length(dev, p->minimum, p->maximum, p->address_length);
+ window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
if (p->resource_type == ACPI_MEMORY_RANGE)
- pnpacpi_parse_allocated_memresource(dev,
- p->minimum, p->address_length,
- p->info.mem.write_protect);
+ pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
+ p->info.mem.write_protect, window);
else if (p->resource_type == ACPI_IO_RANGE)
- pnpacpi_parse_allocated_ioresource(dev,
- p->minimum, p->address_length,
+ pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
p->granularity == 0xfff ? ACPI_DECODE_10 :
- ACPI_DECODE_16);
+ ACPI_DECODE_16, window);
+ else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+ pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
}
static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
struct acpi_resource *res)
{
struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
+ int window;
+ u64 len;
- if (p->producer_consumer == ACPI_PRODUCER)
- return;
+ len = addr_space_length(dev, p->minimum, p->maximum, p->address_length);
+ window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
if (p->resource_type == ACPI_MEMORY_RANGE)
- pnpacpi_parse_allocated_memresource(dev,
- p->minimum, p->address_length,
- p->info.mem.write_protect);
+ pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
+ p->info.mem.write_protect, window);
else if (p->resource_type == ACPI_IO_RANGE)
- pnpacpi_parse_allocated_ioresource(dev,
- p->minimum, p->address_length,
+ pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
p->granularity == 0xfff ? ACPI_DECODE_10 :
- ACPI_DECODE_16);
+ ACPI_DECODE_16, window);
+ else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+ pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
}
static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
@@ -368,7 +406,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
pnpacpi_parse_allocated_ioresource(dev,
io->minimum,
io->address_length,
- io->io_decode);
+ io->io_decode, 0);
break;
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
@@ -380,7 +418,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
pnpacpi_parse_allocated_ioresource(dev,
fixed_io->address,
fixed_io->address_length,
- ACPI_DECODE_10);
+ ACPI_DECODE_10, 0);
break;
case ACPI_RESOURCE_TYPE_VENDOR:
@@ -396,21 +434,21 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
pnpacpi_parse_allocated_memresource(dev,
memory24->minimum,
memory24->address_length,
- memory24->write_protect);
+ memory24->write_protect, 0);
break;
case ACPI_RESOURCE_TYPE_MEMORY32:
memory32 = &res->data.memory32;
pnpacpi_parse_allocated_memresource(dev,
memory32->minimum,
memory32->address_length,
- memory32->write_protect);
+ memory32->write_protect, 0);
break;
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
fixed_memory32 = &res->data.fixed_memory32;
pnpacpi_parse_allocated_memresource(dev,
fixed_memory32->address,
fixed_memory32->address_length,
- fixed_memory32->write_protect);
+ fixed_memory32->write_protect, 0);
break;
case ACPI_RESOURCE_TYPE_ADDRESS16:
case ACPI_RESOURCE_TYPE_ADDRESS32:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 18:26:33 +0100