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| author |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2020-07-14 13:50:31 -0600 |
|---|---|---|
| committer |   Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-07-16 23:06:10 -0700 |
| commit | 88d3a1360755b7dd88a737ef2cd966a54c932682 (patch) | |
| tree | 16ff4e409340ed065325401c176a1f7392de8163 /drivers/remoteproc | |
| parent | remoteproc: Introducing function rproc_actuate() (diff) | |
| download | wireguard-linux-88d3a1360755b7dd88a737ef2cd966a54c932682.tar.xz wireguard-linux-88d3a1360755b7dd88a737ef2cd966a54c932682.zip | |
remoteproc: Introducing function rproc_validate()
Add a new function to assert the general health of the remote
processor before handing it to the remoteproc core.
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/20200714195035.1426873-6-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index a62c4a74094b..7e6b17a23cf2 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -2043,6 +2043,43 @@ struct rproc *rproc_get_by_phandle(phandle phandle) #endif EXPORT_SYMBOL(rproc_get_by_phandle); +static int rproc_validate(struct rproc *rproc) +{ + switch (rproc->state) { + case RPROC_OFFLINE: + /* + * An offline processor without a start() + * function makes no sense. + */ + if (!rproc->ops->start) + return -EINVAL; + break; + case RPROC_DETACHED: + /* + * A remote processor in a detached state without an + * attach() function makes not sense. + */ + if (!rproc->ops->attach) + return -EINVAL; + /* + * When attaching to a remote processor the device memory + * is already available and as such there is no need to have a + * cached table. + */ + if (rproc->cached_table) + return -EINVAL; + break; + default: + /* + * When adding a remote processor, the state of the device + * can be offline or detached, nothing else. + */ + return -EINVAL; + } + + return 0; +} + /** * rproc_add() - register a remote processor * @rproc: the remote processor handle to register @@ -2072,6 +2109,10 @@ int rproc_add(struct rproc *rproc) if (ret < 0) return ret; + ret = rproc_validate(rproc); + if (ret < 0) + return ret; + dev_info(dev, "%s is available\n", rproc->name); /* create debugfs entries */ |