From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org
Cc: arnaud.pouliquen@st.com, mcoquelin.stm32@gmail.com,
alexandre.torgue@st.com, linux-remoteproc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v7 16/17] remoteproc: Properly deal with a detach request when attached
Date: Wed, 10 Mar 2021 14:10:24 -0700 [thread overview]
Message-ID: <20210310211025.1084636-17-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20210310211025.1084636-1-mathieu.poirier@linaro.org>
This patch introduces the capability to detach a remote processor
that has been attached to by the remoteproc core. For that to happen
a rproc::ops::detach() operation needs to be available.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
---
drivers/remoteproc/remoteproc_cdev.c | 5 +++++
drivers/remoteproc/remoteproc_sysfs.c | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index 0249d8f6c3f8..2db494816d5f 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -43,6 +43,11 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
return -EINVAL;
rproc_shutdown(rproc);
+ } else if (!strncmp(cmd, "detach", len)) {
+ if (rproc->state != RPROC_ATTACHED)
+ return -EINVAL;
+
+ ret = rproc_detach(rproc);
} else {
dev_err(&rproc->dev, "Unrecognized option\n");
ret = -EINVAL;
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 09eb700c5e7e..ad3dd208024c 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -207,6 +207,11 @@ static ssize_t state_store(struct device *dev,
return -EINVAL;
rproc_shutdown(rproc);
+ } else if (sysfs_streq(buf, "detach")) {
+ if (rproc->state != RPROC_ATTACHED)
+ return -EINVAL;
+
+ ret = rproc_detach(rproc);
} else {
dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
ret = -EINVAL;
--
2.25.1
next prev parent reply other threads:[~2021-03-10 21:11 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-10 21:10 [PATCH v7 00/17] remoteproc: Add support for detaching a remote processor Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 01/17] remoteproc: Remove useless check in rproc_del() Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 02/17] remoteproc: Rename function rproc_actuate() Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 03/17] remoteproc: Add new RPROC_ATTACHED state Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 04/17] remoteproc: Properly represent the attached state Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 05/17] remoteproc: Add new get_loaded_rsc_table() to rproc_ops Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 06/17] remoteproc: stm32: Move resource table setup " Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 07/17] remoteproc: stm32: Move memory parsing " Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 08/17] remoteproc: Add new detach() remoteproc operation Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 09/17] remoteproc: Introduce function __rproc_detach() Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 10/17] remoteproc: Introduce function rproc_detach() Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 11/17] remoteproc: Properly deal with the resource table when detaching Mathieu Poirier
2021-03-11 9:09 ` Arnaud POULIQUEN
2021-03-10 21:10 ` [PATCH v7 12/17] remoteproc: Properly deal with the resource table when stopping Mathieu Poirier
2021-03-10 23:00 ` kernel test robot
2021-03-10 23:53 ` Bjorn Andersson
2021-03-11 9:14 ` Arnaud POULIQUEN
2021-03-11 17:13 ` Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 13/17] remoteproc: Properly deal with a kernel panic when attached Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 14/17] remoteproc: Properly deal with a start request " Mathieu Poirier
2021-03-10 21:10 ` [PATCH v7 15/17] remoteproc: Properly deal with a stop " Mathieu Poirier
2021-03-10 21:10 ` Mathieu Poirier [this message]
2021-03-10 21:10 ` [PATCH v7 17/17] remoteproc: Refactor function rproc_cdev_release() Mathieu Poirier
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