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firmware: qcom: scm: add support for SHM bridge memory carveout

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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@linaro.org>
Reviewed-by: Elliot Berman <quic_eberman@quicinc.com>
Link: https://lore.kernel.org/r/20240527-shm-bridge-v10-12-ce7afaa58d3a@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Bartosz Golaszewski 2024-05-27 14:55:02 +02:00 committed by Bjorn Andersson
parent f86c61498a
commit a33b2579c8
1 changed files with 6 additions and 0 deletions
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6
drivers/firmware/qcom/qcom_scm.c
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@ -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>
@ -1956,6 +1957,11 @@ 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,