PNPACPI: parse Extended Address Space Descriptors
Extended Address Space Descriptors are new in ACPI 3.0 and allow the BIOS to communicate device resource cacheability attributes (write-back, write-through, uncacheable, etc) to the OS. Previously, PNPACPI ignored these descriptors, so if a BIOS used them, a device could be responding at addresses the OS doesn't know about. This patch adds support for these descriptors in _CRS and _PRS. We don't attempt to encode them for _SRS (just like we don't attempt to encode the existing 16-, 32-, and 64-bit Address Space Descriptors). Unfortunately, I don't have a way to test this. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -287,6 +287,25 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
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ACPI_DECODE_16);
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}
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static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
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struct acpi_resource *res)
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{
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struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
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if (p->producer_consumer == ACPI_PRODUCER)
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return;
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if (p->resource_type == ACPI_MEMORY_RANGE)
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pnpacpi_parse_allocated_memresource(dev,
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p->minimum, p->address_length,
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p->info.mem.write_protect);
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else if (p->resource_type == ACPI_IO_RANGE)
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pnpacpi_parse_allocated_ioresource(dev,
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p->minimum, p->address_length,
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p->granularity == 0xfff ? ACPI_DECODE_10 :
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ACPI_DECODE_16);
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}
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static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
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void *data)
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{
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@ -400,8 +419,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
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break;
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case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
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if (res->data.ext_address64.producer_consumer == ACPI_PRODUCER)
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return AE_OK;
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pnpacpi_parse_allocated_ext_address_space(dev, res);
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break;
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case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
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@ -630,6 +648,28 @@ static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
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IORESOURCE_IO_FIXED);
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}
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static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
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unsigned int option_flags,
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struct acpi_resource *r)
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{
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struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
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unsigned char flags = 0;
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if (p->address_length == 0)
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return;
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if (p->resource_type == ACPI_MEMORY_RANGE) {
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if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
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flags = IORESOURCE_MEM_WRITEABLE;
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pnp_register_mem_resource(dev, option_flags, p->minimum,
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p->minimum, 0, p->address_length,
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flags);
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} else if (p->resource_type == ACPI_IO_RANGE)
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pnp_register_port_resource(dev, option_flags, p->minimum,
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p->minimum, 0, p->address_length,
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IORESOURCE_IO_FIXED);
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}
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struct acpipnp_parse_option_s {
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struct pnp_dev *dev;
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unsigned int option_flags;
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@ -711,6 +751,7 @@ static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
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break;
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case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
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pnpacpi_parse_ext_address_option(dev, option_flags, res);
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break;
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case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
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@ -765,6 +806,7 @@ static int pnpacpi_supported_resource(struct acpi_resource *res)
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
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case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
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return 1;
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}
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