drivers/{pcie,wifi}/generic: Update untrusted property name

In order to align with established standards for establishing DMA
boundaries[1] from ACPI, the UntrustedDevice property has been renamed
to DmaProperty, which follows Microsoft's implementation. After
discussions with Microsoft, they have agreed to make the `UID` property
optional, so it is left out here, and instead it can be applied to:

1) Internal PCI devices
2) PCIe root ports
3) Downstream PCI(e) devices

[1]: https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports

BUG=b:215424986

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Id70e916532e3d3d70305fc61473da28c702fc397
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62435
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
This commit is contained in:
Tim Wawrzynczak
2022-02-23 10:17:21 -07:00
parent 114d650fce
commit afaee235fa
4 changed files with 7 additions and 8 deletions

View File

@@ -515,13 +515,13 @@ static void wifi_ssdt_write_properties(const struct device *dev, const char *sco
/* Wake capabilities */
acpigen_write_PRW(config->wake, ACPI_S3);
/* Add _DSD for UntrustedDevice property. */
/* Add _DSD for DmaProperty property. */
if (config->is_untrusted) {
struct acpi_dp *dsd, *pkg;
dsd = acpi_dp_new_table("_DSD");
pkg = acpi_dp_new_table(ACPI_DSD_UNTRUSTED_UUID);
acpi_dp_add_integer(pkg, "UntrustedDevice", 1);
acpi_dp_add_integer(pkg, "DmaProperty", 1);
acpi_dp_add_package(dsd, pkg);
acpi_dp_write(dsd);
}

View File

@@ -10,7 +10,7 @@
struct drivers_wifi_generic_config {
unsigned int wake;
/* When set to true, this will add a _DSD which contains a single
property, `UntrustedDevice`, set to 1, to the ACPI Device. */
property, `DmaProperty`, set to 1, under the ACPI Device. */
bool is_untrusted;
};