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Subject[PATCH 3/7] slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support
Date
Add support to protection domain restart. Protection domain restart
would also restart the service just like SSR.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
drivers/slimbus/Kconfig | 1 +
drivers/slimbus/qcom-ngd-ctrl.c | 24 ++++++++++++++++++++++++
2 files changed, 25 insertions(+)

diff --git a/drivers/slimbus/Kconfig b/drivers/slimbus/Kconfig
index 02534ce86e46..7d59956b5dfb 100644
--- a/drivers/slimbus/Kconfig
+++ b/drivers/slimbus/Kconfig
@@ -26,6 +26,7 @@ config SLIM_QCOM_NGD_CTRL
depends on ARCH_QCOM || COMPILE_TEST
select QCOM_QMI_HELPERS
select QCOM_RPROC_COMMON
+ select QCOM_PDR_HELPERS
help
Select driver if Qualcomm's SLIMbus Satellite Non-Generic Device
Component is programmed using Linux kernel.
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index d32e6b37514d..943d55a0bc59 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -19,6 +19,7 @@
#include <linux/of.h>
#include <linux/io.h>
#include <linux/soc/qcom/qmi.h>
+#include <linux/soc/qcom/pdr.h>
#include <net/sock.h>
#include "slimbus.h"

@@ -166,6 +167,7 @@ struct qcom_slim_ngd_ctrl {
struct mutex ssr_lock;
struct notifier_block nb;
void *notifier;
+ struct pdr_handle *pdr;
enum qcom_slim_ngd_state state;
dma_addr_t rx_phys_base;
dma_addr_t tx_phys_base;
@@ -1382,6 +1384,7 @@ static int qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl *ctrl,
{
switch (action) {
case QCOM_SSR_BEFORE_SHUTDOWN:
+ case SERVREG_SERVICE_STATE_DOWN:
/* Make sure the last dma xfer is finished */
mutex_lock(&ctrl->tx_lock);
if (ctrl->state != QCOM_SLIM_NGD_CTRL_DOWN) {
@@ -1393,6 +1396,7 @@ static int qcom_slim_ngd_ssr_pdr_notify(struct qcom_slim_ngd_ctrl *ctrl,
mutex_unlock(&ctrl->tx_lock);
break;
case QCOM_SSR_AFTER_POWERUP:
+ case SERVREG_SERVICE_STATE_UP:
schedule_work(&ctrl->ngd_up_work);
break;
default:
@@ -1412,6 +1416,12 @@ static int qcom_slim_ngd_ssr_notify(struct notifier_block *nb,
return qcom_slim_ngd_ssr_pdr_notify(ctrl, action);
}

+static void slim_pd_status(int state, char *svc_path, void *priv)
+{
+ struct qcom_slim_ngd_ctrl *ctrl = (struct qcom_slim_ngd_ctrl *)priv;
+
+ qcom_slim_ngd_ssr_pdr_notify(ctrl, state);
+}
static int of_qcom_slim_ngd_register(struct device *parent,
struct qcom_slim_ngd_ctrl *ctrl)
{
@@ -1499,6 +1509,7 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
struct qcom_slim_ngd_ctrl *ctrl;
struct resource *res;
int ret;
+ struct pdr_service *pds;

ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
@@ -1549,6 +1560,18 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev)
init_completion(&ctrl->qmi.qmi_comp);
init_completion(&ctrl->qmi_up);

+ ctrl->pdr = pdr_handle_alloc(slim_pd_status, ctrl);
+ if (IS_ERR(ctrl->pdr)) {
+ dev_err(dev, "Failed to init PDR handle\n");
+ return PTR_ERR(ctrl->pdr);
+ }
+
+ pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd");
+ if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) {
+ dev_err(dev, "pdr add lookup failed: %d\n", ret);
+ return PTR_ERR(pds);
+ }
+
platform_driver_register(&qcom_slim_ngd_driver);
return of_qcom_slim_ngd_register(dev, ctrl);
}
@@ -1565,6 +1588,7 @@ static int qcom_slim_ngd_remove(struct platform_device *pdev)
struct qcom_slim_ngd_ctrl *ctrl = platform_get_drvdata(pdev);

pm_runtime_disable(&pdev->dev);
+ pdr_handle_release(ctrl->pdr);
qcom_unregister_ssr_notifier(ctrl->notifier, &ctrl->nb);
qcom_slim_ngd_enable(ctrl, false);
qcom_slim_ngd_exit_dma(ctrl);
--
2.21.0
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