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slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support 

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>
Link: https://lore.kernel.org/r/20201127102451.17114-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Kandagatla 2020-11-27 10:24:47 +00:00 committed by Greg Kroah-Hartman
parent a899d32486
commit e1ae85e183
2 changed files with 25 additions and 0 deletions
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1
drivers/slimbus/Kconfig
View File

@ -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.

24
drivers/slimbus/qcom-ngd-ctrl.c
View File

@ -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);