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authorAlex Elder <elder@linaro.org>2020-03-06 07:28:15 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-09 08:07:09 +0300
commitd7f5f3c89c1a2344e88842ba0de327cc0098583e (patch)
tree252ea77fe2aaf862b2b103972a8ab4ddecb32d7c /drivers/remoteproc
parente2f5cb7280f81aa1f3e4d38f51f89995ac14e502 (diff)
downloadlinux-d7f5f3c89c1a2344e88842ba0de327cc0098583e.tar.xz
remoteproc: add IPA notification to q6v5 driver
Set up a subdev in the q6v5 modem remoteproc driver that generates event notifications for the IPA driver to use for initialization and recovery following a modem shutdown or crash. A pair of new functions provides a way for the IPA driver to register and deregister a notification callback function that will be called whenever modem events (about to boot, running, about to shut down, etc.) occur. A void pointer value (provided by the IPA driver at registration time) and an event type are supplied to the callback function. One event, MODEM_REMOVING, is signaled whenever the q6v5 driver is about to remove the notification subdevice. It requires the IPA driver de-register its callback. This sub-device is only used by the modem subsystem (MSS) driver, so the code that adds the new subdev and allows registration and deregistration of the notifier is found in "qcom_q6v6_mss.c". Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/Kconfig6
-rw-r--r--drivers/remoteproc/Makefile1
-rw-r--r--drivers/remoteproc/qcom_q6v5_ipa_notify.c85
-rw-r--r--drivers/remoteproc/qcom_q6v5_mss.c38
4 files changed, 130 insertions, 0 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index de3862c15fcc..56084635dd63 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -167,6 +167,12 @@ config QCOM_Q6V5_WCSS
Say y here to support the Qualcomm Peripheral Image Loader for the
Hexagon V5 based WCSS remote processors.
+config QCOM_Q6V5_IPA_NOTIFY
+ tristate
+ depends on QCOM_IPA
+ depends on QCOM_Q6V5_MSS
+ default QCOM_IPA
+
config QCOM_SYSMON
tristate "Qualcomm sysmon driver"
depends on RPMSG
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index e30a1b15fbac..0effd3825035 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_QCOM_Q6V5_ADSP) += qcom_q6v5_adsp.o
obj-$(CONFIG_QCOM_Q6V5_MSS) += qcom_q6v5_mss.o
obj-$(CONFIG_QCOM_Q6V5_PAS) += qcom_q6v5_pas.o
obj-$(CONFIG_QCOM_Q6V5_WCSS) += qcom_q6v5_wcss.o
+obj-$(CONFIG_QCOM_Q6V5_IPA_NOTIFY) += qcom_q6v5_ipa_notify.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
qcom_wcnss_pil-y += qcom_wcnss.o
diff --git a/drivers/remoteproc/qcom_q6v5_ipa_notify.c b/drivers/remoteproc/qcom_q6v5_ipa_notify.c
new file mode 100644
index 000000000000..e1c10a128bfd
--- /dev/null
+++ b/drivers/remoteproc/qcom_q6v5_ipa_notify.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Qualcomm IPA notification subdev support
+ *
+ * Copyright (C) 2019 Linaro Ltd.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc/qcom_q6v5_ipa_notify.h>
+
+static void
+ipa_notify_common(struct rproc_subdev *subdev, enum qcom_rproc_event event)
+{
+ struct qcom_rproc_ipa_notify *ipa_notify;
+ qcom_ipa_notify_t notify;
+
+ ipa_notify = container_of(subdev, struct qcom_rproc_ipa_notify, subdev);
+ notify = ipa_notify->notify;
+ if (notify)
+ notify(ipa_notify->data, event);
+}
+
+static int ipa_notify_prepare(struct rproc_subdev *subdev)
+{
+ ipa_notify_common(subdev, MODEM_STARTING);
+
+ return 0;
+}
+
+static int ipa_notify_start(struct rproc_subdev *subdev)
+{
+ ipa_notify_common(subdev, MODEM_RUNNING);
+
+ return 0;
+}
+
+static void ipa_notify_stop(struct rproc_subdev *subdev, bool crashed)
+
+{
+ ipa_notify_common(subdev, crashed ? MODEM_CRASHED : MODEM_STOPPING);
+}
+
+static void ipa_notify_unprepare(struct rproc_subdev *subdev)
+{
+ ipa_notify_common(subdev, MODEM_OFFLINE);
+}
+
+static void ipa_notify_removing(struct rproc_subdev *subdev)
+{
+ ipa_notify_common(subdev, MODEM_REMOVING);
+}
+
+/* Register the IPA notification subdevice with the Q6V5 MSS remoteproc */
+void qcom_add_ipa_notify_subdev(struct rproc *rproc,
+ struct qcom_rproc_ipa_notify *ipa_notify)
+{
+ ipa_notify->notify = NULL;
+ ipa_notify->data = NULL;
+ ipa_notify->subdev.prepare = ipa_notify_prepare;
+ ipa_notify->subdev.start = ipa_notify_start;
+ ipa_notify->subdev.stop = ipa_notify_stop;
+ ipa_notify->subdev.unprepare = ipa_notify_unprepare;
+
+ rproc_add_subdev(rproc, &ipa_notify->subdev);
+}
+EXPORT_SYMBOL_GPL(qcom_add_ipa_notify_subdev);
+
+/* Remove the IPA notification subdevice */
+void qcom_remove_ipa_notify_subdev(struct rproc *rproc,
+ struct qcom_rproc_ipa_notify *ipa_notify)
+{
+ struct rproc_subdev *subdev = &ipa_notify->subdev;
+
+ ipa_notify_removing(subdev);
+
+ rproc_remove_subdev(rproc, subdev);
+ ipa_notify->notify = NULL; /* Make it obvious */
+}
+EXPORT_SYMBOL_GPL(qcom_remove_ipa_notify_subdev);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm IPA notification remoteproc subdev");
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index a1cc9cbe038f..f9ccce76e44b 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -22,6 +22,7 @@
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc.h>
+#include "linux/remoteproc/qcom_q6v5_ipa_notify.h"
#include <linux/reset.h>
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/iopoll.h>
@@ -201,6 +202,7 @@ struct q6v5 {
struct qcom_rproc_glink glink_subdev;
struct qcom_rproc_subdev smd_subdev;
struct qcom_rproc_ssr ssr_subdev;
+ struct qcom_rproc_ipa_notify ipa_notify_subdev;
struct qcom_sysmon *sysmon;
bool need_mem_protection;
bool has_alt_reset;
@@ -1540,6 +1542,39 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc)
return 0;
}
+#if IS_ENABLED(CONFIG_QCOM_Q6V5_IPA_NOTIFY)
+
+/* Register IPA notification function */
+int qcom_register_ipa_notify(struct rproc *rproc, qcom_ipa_notify_t notify,
+ void *data)
+{
+ struct qcom_rproc_ipa_notify *ipa_notify;
+ struct q6v5 *qproc = rproc->priv;
+
+ if (!notify)
+ return -EINVAL;
+
+ ipa_notify = &qproc->ipa_notify_subdev;
+ if (ipa_notify->notify)
+ return -EBUSY;
+
+ ipa_notify->notify = notify;
+ ipa_notify->data = data;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_register_ipa_notify);
+
+/* Deregister IPA notification function */
+void qcom_deregister_ipa_notify(struct rproc *rproc)
+{
+ struct q6v5 *qproc = rproc->priv;
+
+ qproc->ipa_notify_subdev.notify = NULL;
+}
+EXPORT_SYMBOL_GPL(qcom_deregister_ipa_notify);
+#endif /* !IS_ENABLED(CONFIG_QCOM_Q6V5_IPA_NOTIFY) */
+
static int q6v5_probe(struct platform_device *pdev)
{
const struct rproc_hexagon_res *desc;
@@ -1664,6 +1699,7 @@ static int q6v5_probe(struct platform_device *pdev)
qcom_add_glink_subdev(rproc, &qproc->glink_subdev);
qcom_add_smd_subdev(rproc, &qproc->smd_subdev);
qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss");
+ qcom_add_ipa_notify_subdev(rproc, &qproc->ipa_notify_subdev);
qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
if (IS_ERR(qproc->sysmon)) {
ret = PTR_ERR(qproc->sysmon);
@@ -1677,6 +1713,7 @@ static int q6v5_probe(struct platform_device *pdev)
return 0;
detach_proxy_pds:
+ qcom_remove_ipa_notify_subdev(qproc->rproc, &qproc->ipa_notify_subdev);
q6v5_pds_detach(qproc, qproc->proxy_pds, qproc->proxy_pd_count);
detach_active_pds:
q6v5_pds_detach(qproc, qproc->active_pds, qproc->active_pd_count);
@@ -1693,6 +1730,7 @@ static int q6v5_remove(struct platform_device *pdev)
rproc_del(qproc->rproc);
qcom_remove_sysmon_subdev(qproc->sysmon);
+ qcom_remove_ipa_notify_subdev(qproc->rproc, &qproc->ipa_notify_subdev);
qcom_remove_glink_subdev(qproc->rproc, &qproc->glink_subdev);
qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);