[S] Change in coreboot[master]: acpi: Create a common method to add DmaProperty

[Kapil Porwal (Code Review)]

Kapil Porwal has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/70022 )

Change subject: acpi: Create a common method to add DmaProperty
......................................................................

acpi: Create a common method to add DmaProperty

Create a common method to add DmaProperty.

BUG=b:259716145
TEST=Verified SSDT on google/osiris.

Signed-off-by: Kapil Porwal 
Change-Id: I75b3f22ad29f90f3c3b251bd0d70bae9d75f71fe
---
M src/acpi/device.c
M src/include/acpi/acpi_device.h
2 files changed, 42 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/22/70022/1

diff --git a/src/acpi/device.c b/src/acpi/device.c
index 2b085b6..a8dcd88 100644
--- a/src/acpi/device.c
+++ b/src/acpi/device.c
@@ -1183,3 +1183,21 @@
    acpigen_pop_len(); /* Device */
    acpigen_pop_len(); /* Scope */
 }
+
+/* ID for the DmaProperty _DSD */
+#define ACPI_DSD_DMA_PROPERTY_UUID "70D24161-6DD5-4C9E-8070-705531292865"
+
+/* _DSD with DmaProperty */
+void acpi_device_add_dma_property(struct acpi_dp *dsd)
+{
+	struct acpi_dp *prev_dsd = dsd, *pkg;
+	if (prev_dsd == NULL) {
+		dsd = acpi_dp_new_table("_DSD");
+	}
+	pkg = acpi_dp_new_table(ACPI_DSD_DMA_PROPERTY_UUID);
+	acpi_dp_add_integer(pkg, "DmaProperty", 1);
+	acpi_dp_add_package(dsd, pkg);
+	if (prev_dsd == NULL) {
+		acpi_dp_write(dsd);
+	}
+}
diff --git a/src/include/acpi/acpi_device.h b/src/include/acpi/acpi_device.h
index 71809eb..1493cb4 100644
--- a/src/include/acpi/acpi_device.h
+++ b/src/include/acpi/acpi_device.h
@@ -588,4 +588,13 @@
  */
 void acpi_device_write_pci_dev(const struct device *dev);

+/*
+ * Helper function to add DmaProperty to _DSD in the current scope.
+ *
+ * dsd - Pointer to a _DSD object.
+ *       Append to existing _DSD object if not NULL.
+ *       Create new _DSD object and flush it if NULL.
+ */
+void acpi_device_add_dma_property(struct acpi_dp *dsd);
+
 #endif /* __ACPI_ACPI_DEVICE_H__ */