[PATCH v10 12/15] firmware: qcom: scm: add support for SHM bridge memory carveout

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

Parse the "memory-region" property and - if present - use it to assign
the dedicated reserved memory to the underlying DMA callbacks which will
then allocate memory for the SCM calls from it.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
 drivers/firmware/qcom/qcom_scm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 94c34cde8179..c82957727650 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -23,6 +23,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
 #include <linux/sizes.h>
@@ -1942,6 +1943,11 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	if (of_property_read_bool(pdev->dev.of_node, "qcom,sdi-enabled"))
 		qcom_scm_disable_sdi();
 
+	ret = of_reserved_mem_device_init(__scm->dev);
+	if (ret && ret != -ENODEV)
+		return dev_err_probe(__scm->dev, ret,
+				     "Failed to setup the reserved memory region for TZ mem\n");
+
 	ret = qcom_tzmem_enable(__scm->dev);
 	if (ret)
 		return dev_err_probe(__scm->dev, ret,

-- 
2.43.0