* [PATCH V6 1/5] rpmsg: glink: Use complete_all for open states
[not found] <1589967579-15559-1-git-send-email-aneela@codeaurora.org>
@ 2020-05-20 9:39 ` Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 3/5] rpmsg: glink: Add support for rpmsg glink chrdev Arun Kumar Neelakantam
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: Arun Kumar Neelakantam @ 2020-05-20 9:39 UTC (permalink / raw)
To: ohad, bjorn.andersson, clew, sricharan
Cc: linux-remoteproc, linux-kernel, Arun Kumar Neelakantam,
Andy Gross, open list:ARM/QUALCOMM SUPPORT
From: Chris Lew <clew@codeaurora.org>
The open_req and open_ack completion variables are the state variables
to represent a remote channel as open. Use complete_all so there are no
races with waiters and using completion_done.
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/qcom_glink_native.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 1995f5b..ea2f33f 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -970,7 +970,7 @@ static int qcom_glink_rx_open_ack(struct qcom_glink *glink, unsigned int lcid)
return -EINVAL;
}
- complete(&channel->open_ack);
+ complete_all(&channel->open_ack);
return 0;
}
@@ -1178,7 +1178,7 @@ static int qcom_glink_announce_create(struct rpmsg_device *rpdev)
__be32 *val = defaults;
int size;
- if (glink->intentless)
+ if (glink->intentless || !completion_done(&channel->open_ack))
return 0;
prop = of_find_property(np, "qcom,intents", NULL);
@@ -1413,7 +1413,7 @@ static int qcom_glink_rx_open(struct qcom_glink *glink, unsigned int rcid,
channel->rcid = ret;
spin_unlock_irqrestore(&glink->idr_lock, flags);
- complete(&channel->open_req);
+ complete_all(&channel->open_req);
if (create_device) {
rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH V6 3/5] rpmsg: glink: Add support for rpmsg glink chrdev
[not found] <1589967579-15559-1-git-send-email-aneela@codeaurora.org>
2020-05-20 9:39 ` [PATCH V6 1/5] rpmsg: glink: Use complete_all for open states Arun Kumar Neelakantam
@ 2020-05-20 9:39 ` Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 4/5] rpmsg: glink: Expose rpmsg name attr for glink Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 5/5] rpmsg: glink: unregister rpmsg device during endpoint destroy Arun Kumar Neelakantam
3 siblings, 0 replies; 4+ messages in thread
From: Arun Kumar Neelakantam @ 2020-05-20 9:39 UTC (permalink / raw)
To: ohad, bjorn.andersson, clew, sricharan
Cc: linux-remoteproc, linux-kernel, Arun Kumar Neelakantam,
Andy Gross, open list:ARM/QUALCOMM SUPPORT
From: Chris Lew <clew@codeaurora.org>
RPMSG provides a char device interface to userspace. Probe the rpmsg
chrdev channel to enable the rpmsg_ctrl device creation on glink
transports.
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/qcom_glink_native.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index ea2f33f..b85433c 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1574,6 +1574,40 @@ static void qcom_glink_cancel_rx_work(struct qcom_glink *glink)
kfree(dcmd);
}
+static void qcom_glink_device_release(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct glink_channel *channel = to_glink_channel(rpdev->ept);
+
+ /* Release qcom_glink_alloc_channel() reference */
+ kref_put(&channel->refcount, qcom_glink_channel_release);
+ kfree(rpdev);
+}
+
+static int qcom_glink_create_chrdev(struct qcom_glink *glink)
+{
+ struct rpmsg_device *rpdev;
+ struct glink_channel *channel;
+
+ rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
+ if (!rpdev)
+ return -ENOMEM;
+
+ channel = qcom_glink_alloc_channel(glink, "rpmsg_chrdev");
+ if (IS_ERR(channel)) {
+ kfree(rpdev);
+ return PTR_ERR(channel);
+ }
+ channel->rpdev = rpdev;
+
+ rpdev->ept = &channel->ept;
+ rpdev->ops = &glink_device_ops;
+ rpdev->dev.parent = glink->dev;
+ rpdev->dev.release = qcom_glink_device_release;
+
+ return rpmsg_chrdev_register_device(rpdev);
+}
+
struct qcom_glink *qcom_glink_native_probe(struct device *dev,
unsigned long features,
struct qcom_glink_pipe *rx,
@@ -1633,6 +1667,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
if (ret)
return ERR_PTR(ret);
+ ret = qcom_glink_create_chrdev(glink);
+ if (ret)
+ dev_err(glink->dev, "failed to register chrdev\n");
+
return glink;
}
EXPORT_SYMBOL_GPL(qcom_glink_native_probe);
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH V6 4/5] rpmsg: glink: Expose rpmsg name attr for glink
[not found] <1589967579-15559-1-git-send-email-aneela@codeaurora.org>
2020-05-20 9:39 ` [PATCH V6 1/5] rpmsg: glink: Use complete_all for open states Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 3/5] rpmsg: glink: Add support for rpmsg glink chrdev Arun Kumar Neelakantam
@ 2020-05-20 9:39 ` Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 5/5] rpmsg: glink: unregister rpmsg device during endpoint destroy Arun Kumar Neelakantam
3 siblings, 0 replies; 4+ messages in thread
From: Arun Kumar Neelakantam @ 2020-05-20 9:39 UTC (permalink / raw)
To: ohad, bjorn.andersson, clew, sricharan
Cc: linux-remoteproc, linux-kernel, Arun Kumar Neelakantam,
Andy Gross, open list:ARM/QUALCOMM SUPPORT
From: Chris Lew <clew@codeaurora.org>
Expose the name field as an attr so clients listening to uevents for
rpmsg can identify the edge the events correspond to.
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/qcom_glink_native.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index b85433c..2b5368b 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1574,6 +1574,26 @@ static void qcom_glink_cancel_rx_work(struct qcom_glink *glink)
kfree(dcmd);
}
+static ssize_t rpmsg_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret = 0;
+ const char *name;
+
+ ret = of_property_read_string(dev->of_node, "label", &name);
+ if (ret < 0)
+ name = dev->of_node->name;
+
+ return snprintf(buf, RPMSG_NAME_SIZE, "%s\n", name);
+}
+static DEVICE_ATTR_RO(rpmsg_name);
+
+static struct attribute *qcom_glink_attrs[] = {
+ &dev_attr_rpmsg_name.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(qcom_glink);
+
static void qcom_glink_device_release(struct device *dev)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
@@ -1638,6 +1658,12 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev,
idr_init(&glink->lcids);
idr_init(&glink->rcids);
+ glink->dev->groups = qcom_glink_groups;
+
+ ret = device_add_groups(dev, qcom_glink_groups);
+ if (ret)
+ dev_err(dev, "failed to add groups\n");
+
ret = of_property_read_string(dev->of_node, "label", &glink->name);
if (ret < 0)
glink->name = dev->of_node->name;
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH V6 5/5] rpmsg: glink: unregister rpmsg device during endpoint destroy
[not found] <1589967579-15559-1-git-send-email-aneela@codeaurora.org>
` (2 preceding siblings ...)
2020-05-20 9:39 ` [PATCH V6 4/5] rpmsg: glink: Expose rpmsg name attr for glink Arun Kumar Neelakantam
@ 2020-05-20 9:39 ` Arun Kumar Neelakantam
3 siblings, 0 replies; 4+ messages in thread
From: Arun Kumar Neelakantam @ 2020-05-20 9:39 UTC (permalink / raw)
To: ohad, bjorn.andersson, clew, sricharan
Cc: linux-remoteproc, linux-kernel, Arun Kumar Neelakantam,
Andy Gross, open list:ARM/QUALCOMM SUPPORT
Rpmsg device unregister is not happening if channel close is triggered
from local side and causing re-registration of device failures.
Unregister rpmsg device for local close in endpoint destroy path.
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/qcom_glink_native.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 2b5368b..53b90a1 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1207,6 +1207,7 @@ static void qcom_glink_destroy_ept(struct rpmsg_endpoint *ept)
{
struct glink_channel *channel = to_glink_channel(ept);
struct qcom_glink *glink = channel->glink;
+ struct rpmsg_channel_info chinfo;
unsigned long flags;
spin_lock_irqsave(&channel->recv_lock, flags);
@@ -1214,6 +1215,13 @@ static void qcom_glink_destroy_ept(struct rpmsg_endpoint *ept)
spin_unlock_irqrestore(&channel->recv_lock, flags);
/* Decouple the potential rpdev from the channel */
+ if (channel->rpdev) {
+ strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
+ chinfo.src = RPMSG_ADDR_ANY;
+ chinfo.dst = RPMSG_ADDR_ANY;
+
+ rpmsg_unregister_device(glink->dev, &chinfo);
+ }
channel->rpdev = NULL;
qcom_glink_send_close_req(glink, channel);
@@ -1477,6 +1485,7 @@ static void qcom_glink_rx_close(struct qcom_glink *glink, unsigned int rcid)
rpmsg_unregister_device(glink->dev, &chinfo);
}
+ channel->rpdev = NULL;
qcom_glink_send_close_ack(glink, channel->rcid);
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-05-20 9:40 UTC | newest]
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[not found] <1589967579-15559-1-git-send-email-aneela@codeaurora.org>
2020-05-20 9:39 ` [PATCH V6 1/5] rpmsg: glink: Use complete_all for open states Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 3/5] rpmsg: glink: Add support for rpmsg glink chrdev Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 4/5] rpmsg: glink: Expose rpmsg name attr for glink Arun Kumar Neelakantam
2020-05-20 9:39 ` [PATCH V6 5/5] rpmsg: glink: unregister rpmsg device during endpoint destroy Arun Kumar Neelakantam
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