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net: ipa: new notification infrastructure 

Use the new SSR notifier infrastructure to request notifications of
modem events, rather than the remoteproc IPA notification system.
The latter was put in place temporarily with the knowledge that the
new mechanism would become available.

Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20200724181142.13581-2-elder@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Alex Elder 2020-07-24 13:11:41 -05:00 committed by Bjorn Andersson
parent 87218f96c2
commit 30eb3fbee3
2 changed files with 38 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ipa/ipa.h
View File

@ -10,6 +10,7 @@
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/pm_wakeup.h>
#include <linux/notifier.h>
#include "ipa_version.h"
#include "gsi.h"
@ -73,6 +74,8 @@ struct ipa {
enum ipa_version version;
struct platform_device *pdev;
struct rproc *modem_rproc;
struct notifier_block nb;
void *notifier;
struct ipa_smp2p *smp2p;
struct ipa_clock *clock;
atomic_t suspend_ref;

56
drivers/net/ipa/ipa_modem.c
View File

@ -9,7 +9,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/if_rmnet.h>
#include <linux/remoteproc/qcom_q6v5_ipa_notify.h>
#include <linux/remoteproc/qcom_rproc.h>
#include "ipa.h"
#include "ipa_data.h"
@ -311,43 +311,40 @@ static void ipa_modem_crashed(struct ipa *ipa)
dev_err(dev, "error %d zeroing modem memory regions\n", ret);
}
static void ipa_modem_notify(void *data, enum qcom_rproc_event event)
static int ipa_modem_notify(struct notifier_block *nb, unsigned long action,
void *data)
{
struct ipa *ipa = data;
struct device *dev;
struct ipa *ipa = container_of(nb, struct ipa, nb);
struct qcom_ssr_notify_data *notify_data = data;
struct device *dev = &ipa->pdev->dev;
dev = &ipa->pdev->dev;
switch (event) {
case MODEM_STARTING:
switch (action) {
case QCOM_SSR_BEFORE_POWERUP:
dev_info(dev, "received modem starting event\n");
ipa_smp2p_notify_reset(ipa);
break;
case MODEM_RUNNING:
case QCOM_SSR_AFTER_POWERUP:
dev_info(dev, "received modem running event\n");
break;
case MODEM_STOPPING:
case MODEM_CRASHED:
case QCOM_SSR_BEFORE_SHUTDOWN:
dev_info(dev, "received modem %s event\n",
event == MODEM_STOPPING ? "stopping"
: "crashed");
notify_data->crashed ? "crashed" : "stopping");
if (ipa->setup_complete)
ipa_modem_crashed(ipa);
break;
case MODEM_OFFLINE:
case QCOM_SSR_AFTER_SHUTDOWN:
dev_info(dev, "received modem offline event\n");
break;
case MODEM_REMOVING:
dev_info(dev, "received modem stopping event\n");
break;
default:
dev_err(&ipa->pdev->dev, "unrecognized event %u\n", event);
dev_err(dev, "received unrecognized event %lu\n", action);
break;
}
return NOTIFY_OK;
}
int ipa_modem_init(struct ipa *ipa, bool modem_init)
@ -362,13 +359,30 @@ void ipa_modem_exit(struct ipa *ipa)
int ipa_modem_config(struct ipa *ipa)
{
return qcom_register_ipa_notify(ipa->modem_rproc, ipa_modem_notify,
ipa);
void *notifier;
ipa->nb.notifier_call = ipa_modem_notify;
notifier = qcom_register_ssr_notifier("mpss", &ipa->nb);
if (IS_ERR(notifier))
return PTR_ERR(notifier);
ipa->notifier = notifier;
return 0;
}
void ipa_modem_deconfig(struct ipa *ipa)
{
qcom_deregister_ipa_notify(ipa->modem_rproc);
struct device *dev = &ipa->pdev->dev;
int ret;
ret = qcom_unregister_ssr_notifier(ipa->notifier, &ipa->nb);
if (ret)
dev_err(dev, "error %d unregistering notifier", ret);
ipa->notifier = NULL;
memset(&ipa->nb, 0, sizeof(ipa->nb));
}
int ipa_modem_setup(struct ipa *ipa)