[coreboot-gerrit] [S] Change in coreboot[master]: drivers/net/r8168: Add support for ACPI DmaProperty

[Kapil Porwal (Code Review)]

Kapil Porwal has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/70016 )

Change subject: drivers/net/r8168: Add support for ACPI DmaProperty
......................................................................

drivers/net/r8168: Add support for ACPI DmaProperty

BUG=b:259716145
TEST=TBD

Signed-off-by: Kapil Porwal 
Change-Id: I647230082362b1093b63793a201eba23a6289121
---
M src/drivers/net/chip.h
M src/drivers/net/r8168.c
2 files changed, 29 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/16/70016/1

diff --git a/src/drivers/net/chip.h b/src/drivers/net/chip.h
index f253cae..203707c 100644
--- a/src/drivers/net/chip.h
+++ b/src/drivers/net/chip.h
@@ -34,6 +34,10 @@

/* Allow kernel driver to enable ASPM L1.2. */
    bool enable_aspm_l1_2;
+
+	/* When set to true, this will add a _DSD which contains a single
+	   property, `DmaProperty`, set to 1, under the ACPI Device. */
+	bool add_acpi_dma_property;
 };

#endif /* __DRIVERS_R8168_CHIP_H__ */
diff --git a/src/drivers/net/r8168.c b/src/drivers/net/r8168.c
index 32e0275..585ee9d 100644
--- a/src/drivers/net/r8168.c
+++ b/src/drivers/net/r8168.c
@@ -24,6 +24,9 @@

#include "chip.h"

+/* ID for the DmaProperty in _DSD */
+#define ACPI_DSD_DMA_PROPERTY_UUID "70D24161-6DD5-4C9E-8070-705531292865"
+
 #define NIC_TIMEOUT		1000

#define CMD_REG			0x37
@@ -400,6 +403,15 @@
    if (config->wake)
    	acpigen_write_PRW(config->wake, 3);

+	if (config->add_acpi_dma_property) {
+		struct acpi_dp *dsd, *pkg;
+		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);
+		acpi_dp_write(dsd);
+	}
+
    acpigen_pop_len(); /* Device */
    acpigen_pop_len(); /* Scope */