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authorSibi Sankar <sibis@codeaurora.org>2019-01-08 15:53:44 +0530
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-01-21 21:14:27 -0800
commit74f2720265541070e2d3721c5261148b4084952e (patch)
tree807a5e3efaf543e172c0bb0b4cdec09427b57c4a /drivers/remoteproc
parent027045a6e2b7cd81216e8a559534a30fb0782702 (diff)
downloadlinux-74f2720265541070e2d3721c5261148b4084952e.tar.gz
remoteproc: qcom: Wait for shutdown-ack/ind on sysmon shutdown
After sending a sysmon shutdown request to the SSCTL service on the subsystem, wait for the service to send shutdown-ack interrupt or an indication message to signal the completion of graceful shutdown. Signed-off-by: Sibi Sankar <sibis@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/qcom_sysmon.c42
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
index 610f31f43cbf..c231314eab66 100644
--- a/drivers/remoteproc/qcom_sysmon.c
+++ b/drivers/remoteproc/qcom_sysmon.c
@@ -36,6 +36,7 @@ struct qcom_sysmon {
struct rpmsg_endpoint *ept;
struct completion comp;
+ struct completion ind_comp;
struct completion shutdown_comp;
struct mutex lock;
@@ -140,6 +141,7 @@ static int sysmon_callback(struct rpmsg_device *rpdev, void *data, int count,
}
#define SSCTL_SHUTDOWN_REQ 0x21
+#define SSCTL_SHUTDOWN_READY_IND 0x21
#define SSCTL_SUBSYS_EVENT_REQ 0x23
#define SSCTL_MAX_MSG_LEN 7
@@ -255,6 +257,29 @@ static struct qmi_elem_info ssctl_subsys_event_resp_ei[] = {
{}
};
+static struct qmi_elem_info ssctl_shutdown_ind_ei[] = {
+ {}
+};
+
+static void sysmon_ind_cb(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+ struct qmi_txn *txn, const void *data)
+{
+ struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi);
+
+ complete(&sysmon->ind_comp);
+}
+
+static struct qmi_msg_handler qmi_indication_handler[] = {
+ {
+ .type = QMI_INDICATION,
+ .msg_id = SSCTL_SHUTDOWN_READY_IND,
+ .ei = ssctl_shutdown_ind_ei,
+ .decoded_size = 0,
+ .fn = sysmon_ind_cb
+ },
+ {}
+};
+
/**
* ssctl_request_shutdown() - request shutdown via SSCTL QMI service
* @sysmon: sysmon context
@@ -265,6 +290,8 @@ static void ssctl_request_shutdown(struct qcom_sysmon *sysmon)
struct qmi_txn txn;
int ret;
+ reinit_completion(&sysmon->ind_comp);
+ reinit_completion(&sysmon->shutdown_comp);
ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_shutdown_resp_ei, &resp);
if (ret < 0) {
dev_err(sysmon->dev, "failed to allocate QMI txn\n");
@@ -286,6 +313,17 @@ static void ssctl_request_shutdown(struct qcom_sysmon *sysmon)
dev_err(sysmon->dev, "shutdown request failed\n");
else
dev_dbg(sysmon->dev, "shutdown request completed\n");
+
+ if (sysmon->shutdown_irq > 0) {
+ ret = wait_for_completion_timeout(&sysmon->shutdown_comp,
+ 10 * HZ);
+ if (!ret) {
+ ret = try_wait_for_completion(&sysmon->ind_comp);
+ if (!ret)
+ dev_err(sysmon->dev,
+ "timeout waiting for shutdown ack\n");
+ }
+ }
}
/**
@@ -470,6 +508,7 @@ struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
sysmon->ssctl_instance = ssctl_instance;
init_completion(&sysmon->comp);
+ init_completion(&sysmon->ind_comp);
init_completion(&sysmon->shutdown_comp);
mutex_init(&sysmon->lock);
@@ -494,7 +533,8 @@ struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
}
}
- ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops, NULL);
+ ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops,
+ qmi_indication_handler);
if (ret < 0) {
dev_err(sysmon->dev, "failed to initialize qmi handle\n");
kfree(sysmon);