diff mbox series

[PATCHv2,06/15] remoteproc/omap: Initialize and assign reserved memory node

Message ID 20191119141645.19777-7-t-kristo@ti.com
State Superseded
Headers show
Series [PATCHv2.5,01/15] dt-bindings: remoteproc: Add OMAP remoteproc bindings | expand

Commit Message

Tero Kristo Nov. 19, 2019, 2:16 p.m. UTC 
From: Suman Anna <s-anna@ti.com>


The reserved memory nodes are not assigned to platform devices by
default in the driver core to avoid the lookup for every platform
device and incur a penalty as the real users are expected to be
only a few devices.

OMAP remoteproc devices fall into the above category and the OMAP
remoteproc driver _requires_ specific CMA pools to be assigned
for each device at the moment to align on the location of the
vrings and vring buffers in the RTOS-side firmware images. So,
use the of_reserved_mem_device_init/release() API appropriately
to assign the corresponding reserved memory region to the OMAP
remoteproc device. Note that only one region per device is
allowed by the framework.

Signed-off-by: Suman Anna <s-anna@ti.com>

Signed-off-by: Tero Kristo <t-kristo@ti.com>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

---
 drivers/remoteproc/omap_remoteproc.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

-- 
2.17.1

--
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diff mbox series

Patch

diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index 28f14e24b389..3ad74c4b4071 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -17,6 +17,7 @@ 
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/remoteproc.h>
@@ -479,14 +480,22 @@  static int omap_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
+	ret = of_reserved_mem_device_init(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "device does not have specific CMA pool\n");
+		goto free_rproc;
+	}
+
 	platform_set_drvdata(pdev, rproc);
 
 	ret = rproc_add(rproc);
 	if (ret)
-		goto free_rproc;
+		goto release_mem;
 
 	return 0;
 
+release_mem:
+	of_reserved_mem_device_release(&pdev->dev);
 free_rproc:
 	rproc_free(rproc);
 	return ret;
@@ -498,6 +507,7 @@  static int omap_rproc_remove(struct platform_device *pdev)
 
 	rproc_del(rproc);
 	rproc_free(rproc);
+	of_reserved_mem_device_release(&pdev->dev);
 
 	return 0;
 }