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PNPACPI: add window support
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Add support for resource windows.  This is for bridge resources, i.e.,
regions where a bridge forwards transactions from the primary to the
secondary side.  This does not add support for *setting* windows via
the /proc interface.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Bjorn Helgaas authored and Len Brown committed Mar 15, 2010
1 parent 9d7cca0 commit fa35b49
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Showing 2 changed files with 24 additions and 17 deletions.
6 changes: 4 additions & 2 deletions drivers/pnp/interface.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -278,9 +278,11 @@ static ssize_t pnp_show_current_resources(struct device *dmdev,
switch (pnp_resource_type(res)) {
case IORESOURCE_IO:
case IORESOURCE_MEM:
pnp_printf(buffer, " %#llx-%#llx\n",
pnp_printf(buffer, " %#llx-%#llx%s\n",
(unsigned long long) res->start,
(unsigned long long) res->end);
(unsigned long long) res->end,
res->flags & IORESOURCE_WINDOW ?
" window" : "");
break;
case IORESOURCE_IRQ:
case IORESOURCE_DMA:
Expand Down
35 changes: 20 additions & 15 deletions drivers/pnp/pnpacpi/rsparser.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -177,7 +177,8 @@ 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;
Expand All @@ -186,6 +187,8 @@ 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);
}
Expand Down Expand Up @@ -247,7 +250,7 @@ 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;
Expand All @@ -256,6 +259,8 @@ 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);
}
Expand All @@ -265,6 +270,7 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
{
struct acpi_resource_address64 addr, *p = &addr;
acpi_status status;
int window;

status = acpi_resource_to_address64(res, p);
if (!ACPI_SUCCESS(status)) {
Expand All @@ -273,37 +279,36 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
return;
}

if (p->producer_consumer == ACPI_PRODUCER)
return;
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);
p->info.mem.write_protect, window);
else if (p->resource_type == ACPI_IO_RANGE)
pnpacpi_parse_allocated_ioresource(dev,
p->minimum, p->address_length,
p->granularity == 0xfff ? ACPI_DECODE_10 :
ACPI_DECODE_16);
ACPI_DECODE_16, window);
}

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;

if (p->producer_consumer == ACPI_PRODUCER)
return;
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);
p->info.mem.write_protect, window);
else if (p->resource_type == ACPI_IO_RANGE)
pnpacpi_parse_allocated_ioresource(dev,
p->minimum, p->address_length,
p->granularity == 0xfff ? ACPI_DECODE_10 :
ACPI_DECODE_16);
ACPI_DECODE_16, window);
}

static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
Expand Down Expand Up @@ -368,7 +373,7 @@ 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:
Expand All @@ -380,7 +385,7 @@ 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:
Expand All @@ -396,21 +401,21 @@ 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:
Expand Down

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