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remoteproc/omap: Initialize and assign reserved memory node

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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>
Reviewed-by: Andrew F. Davis <afd@ti.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200324110035.29907-7-t-kristo@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Suman Anna 2020-03-24 13:00:26 +02:00 committed by Bjorn Andersson
parent 530a1b57e8
commit f4af5bd233
1 changed files with 12 additions and 1 deletions
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13
drivers/remoteproc/omap_remoteproc.c
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@ -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>
@ -486,14 +487,23 @@ 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_warn(&pdev->dev, "device does not have specific CMA pool.\n");
dev_warn(&pdev->dev, "Typically this should be provided,\n");
dev_warn(&pdev->dev, "only omit if you know what you are doing.\n");
}
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;
@ -505,6 +515,7 @@ static int omap_rproc_remove(struct platform_device *pdev)
rproc_del(rproc);
rproc_free(rproc);
of_reserved_mem_device_release(&pdev->dev);
return 0;
}