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remoteproc: Introducing function rproc_actuate()

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Introduce function rproc_actuate() that provides the same
functionatlity as rproc_fw_boot(), but without the steps that
involve interaction with the firmware image.  That way we can
deal with scenarios where the remoteproc core is attaching
to a remote processor that has already been started by another
entity.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20200714195035.1426873-5-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Mathieu Poirier 2020-07-14 13:50:30 -06:00 committed by Bjorn Andersson
parent d848a4819d
commit fdf0e00ed6
1 changed files with 58 additions and 1 deletions
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59
drivers/remoteproc/remoteproc_core.c
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@ -1372,7 +1372,7 @@ reset_table_ptr:
return ret;
}
static int __maybe_unused rproc_attach(struct rproc *rproc)
static int rproc_attach(struct rproc *rproc)
{
struct device *dev = &rproc->dev;
int ret;
@ -1493,6 +1493,63 @@ disable_iommu:
return ret;
}
/*
* Attach to remote processor - similar to rproc_fw_boot() but without
* the steps that deal with the firmware image.
*/
static int __maybe_unused rproc_actuate(struct rproc *rproc)
{
struct device *dev = &rproc->dev;
int ret;
/*
* if enabling an IOMMU isn't relevant for this rproc, this is
* just a nop
*/
ret = rproc_enable_iommu(rproc);
if (ret) {
dev_err(dev, "can't enable iommu: %d\n", ret);
return ret;
}
/* reset max_notifyid */
rproc->max_notifyid = -1;
/* reset handled vdev */
rproc->nb_vdev = 0;
/*
* Handle firmware resources required to attach to a remote processor.
* Because we are attaching rather than booting the remote processor,
* we expect the platform driver to properly set rproc->table_ptr.
*/
ret = rproc_handle_resources(rproc, rproc_loading_handlers);
if (ret) {
dev_err(dev, "Failed to process resources: %d\n", ret);
goto disable_iommu;
}
/* Allocate carveout resources associated to rproc */
ret = rproc_alloc_registered_carveouts(rproc);
if (ret) {
dev_err(dev, "Failed to allocate associated carveouts: %d\n",
ret);
goto clean_up_resources;
}
ret = rproc_attach(rproc);
if (ret)
goto clean_up_resources;
return 0;
clean_up_resources:
rproc_resource_cleanup(rproc);
disable_iommu:
rproc_disable_iommu(rproc);
return ret;
}
/*
* take a firmware and boot it up.
*