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-rw-r--r--net/ncsi/internal.h2
-rw-r--r--net/ncsi/ncsi-manage.c111
-rw-r--r--net/ncsi/ncsi-netlink.c12
3 files changed, 113 insertions, 12 deletions
diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
index ec65778c41f3..bda51cb179fe 100644
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -287,6 +287,7 @@ struct ncsi_dev_priv {
#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */
#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */
#define NCSI_DEV_RESHUFFLE 4
+#define NCSI_DEV_RESET 8 /* Reset state of NC */
unsigned int gma_flag; /* OEM GMA flag */
spinlock_t lock; /* Protect the NCSI device */
#if IS_ENABLED(CONFIG_IPV6)
@@ -342,6 +343,7 @@ extern spinlock_t ncsi_dev_lock;
list_for_each_entry_rcu(nc, &np->channels, node)
/* Resources */
+int ncsi_reset_dev(struct ncsi_dev *nd);
void ncsi_start_channel_monitor(struct ncsi_channel *nc);
void ncsi_stop_channel_monitor(struct ncsi_channel *nc);
struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index b9de5b78c4e9..c814ce9bb3de 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -550,8 +550,10 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
spin_lock_irqsave(&nc->lock, flags);
nc->state = NCSI_CHANNEL_INACTIVE;
spin_unlock_irqrestore(&nc->lock, flags);
- ncsi_process_next_channel(ndp);
-
+ if (ndp->flags & NCSI_DEV_RESET)
+ ncsi_reset_dev(nd);
+ else
+ ncsi_process_next_channel(ndp);
break;
default:
netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
@@ -898,6 +900,16 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
nc->id);
spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_ACTIVE;
+
+ if (ndp->flags & NCSI_DEV_RESET) {
+ /* A reset event happened during config, start it now */
+ nc->reconfigure_needed = false;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ ncsi_reset_dev(nd);
+ break;
+ }
+
if (nc->reconfigure_needed) {
/* This channel's configuration has been updated
* part-way during the config state - start the
@@ -916,7 +928,6 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
break;
}
- nc->state = NCSI_CHANNEL_ACTIVE;
if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
hot_nc = nc;
} else {
@@ -1554,7 +1565,7 @@ int ncsi_start_dev(struct ncsi_dev *nd)
return 0;
}
- return ncsi_choose_active_channel(ndp);
+ return ncsi_reset_dev(nd);
}
EXPORT_SYMBOL_GPL(ncsi_start_dev);
@@ -1567,7 +1578,10 @@ void ncsi_stop_dev(struct ncsi_dev *nd)
int old_state;
unsigned long flags;
- /* Stop the channel monitor and reset channel's state */
+ /* Stop the channel monitor on any active channels. Don't reset the
+ * channel state so we know which were active when ncsi_start_dev()
+ * is next called.
+ */
NCSI_FOR_EACH_PACKAGE(ndp, np) {
NCSI_FOR_EACH_CHANNEL(np, nc) {
ncsi_stop_channel_monitor(nc);
@@ -1575,7 +1589,6 @@ void ncsi_stop_dev(struct ncsi_dev *nd)
spin_lock_irqsave(&nc->lock, flags);
chained = !list_empty(&nc->link);
old_state = nc->state;
- nc->state = NCSI_CHANNEL_INACTIVE;
spin_unlock_irqrestore(&nc->lock, flags);
WARN_ON_ONCE(chained ||
@@ -1588,6 +1601,92 @@ void ncsi_stop_dev(struct ncsi_dev *nd)
}
EXPORT_SYMBOL_GPL(ncsi_stop_dev);
+int ncsi_reset_dev(struct ncsi_dev *nd)
+{
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
+ struct ncsi_channel *nc, *active, *tmp;
+ struct ncsi_package *np;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ndp->lock, flags);
+
+ if (!(ndp->flags & NCSI_DEV_RESET)) {
+ /* Haven't been called yet, check states */
+ switch (nd->state & ncsi_dev_state_major) {
+ case ncsi_dev_state_registered:
+ case ncsi_dev_state_probe:
+ /* Not even probed yet - do nothing */
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ case ncsi_dev_state_suspend:
+ case ncsi_dev_state_config:
+ /* Wait for the channel to finish its suspend/config
+ * operation; once it finishes it will check for
+ * NCSI_DEV_RESET and reset the state.
+ */
+ ndp->flags |= NCSI_DEV_RESET;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ }
+ } else {
+ switch (nd->state) {
+ case ncsi_dev_state_suspend_done:
+ case ncsi_dev_state_config_done:
+ case ncsi_dev_state_functional:
+ /* Ok */
+ break;
+ default:
+ /* Current reset operation happening */
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ }
+ }
+
+ if (!list_empty(&ndp->channel_queue)) {
+ /* Clear any channel queue we may have interrupted */
+ list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
+ list_del_init(&nc->link);
+ }
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ active = NULL;
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
+ if (nc->state == NCSI_CHANNEL_ACTIVE) {
+ active = nc;
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ ncsi_stop_channel_monitor(nc);
+ break;
+ }
+
+ spin_unlock_irqrestore(&nc->lock, flags);
+ }
+ if (active)
+ break;
+ }
+
+ if (!active) {
+ /* Done */
+ spin_lock_irqsave(&ndp->lock, flags);
+ ndp->flags &= ~NCSI_DEV_RESET;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return ncsi_choose_active_channel(ndp);
+ }
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ ndp->flags |= NCSI_DEV_RESET;
+ ndp->active_channel = active;
+ ndp->active_package = active->package;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ nd->state = ncsi_dev_state_suspend;
+ schedule_work(&ndp->work);
+ return 0;
+}
+
void ncsi_unregister_dev(struct ncsi_dev *nd)
{
struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c
index 33314381b4f5..cde48fe43dba 100644
--- a/net/ncsi/ncsi-netlink.c
+++ b/net/ncsi/ncsi-netlink.c
@@ -330,9 +330,9 @@ static int ncsi_set_interface_nl(struct sk_buff *msg, struct genl_info *info)
package_id, channel_id,
channel_id == NCSI_RESERVED_CHANNEL ? " (any)" : "");
- /* Bounce the NCSI channel to set changes */
- ncsi_stop_dev(&ndp->ndev);
- ncsi_start_dev(&ndp->ndev);
+ /* Update channel configuration */
+ if (!(ndp->flags & NCSI_DEV_RESET))
+ ncsi_reset_dev(&ndp->ndev);
return 0;
}
@@ -360,9 +360,9 @@ static int ncsi_clear_interface_nl(struct sk_buff *msg, struct genl_info *info)
spin_unlock_irqrestore(&ndp->lock, flags);
netdev_info(ndp->ndev.dev, "NCSI: Cleared preferred package/channel\n");
- /* Bounce the NCSI channel to set changes */
- ncsi_stop_dev(&ndp->ndev);
- ncsi_start_dev(&ndp->ndev);
+ /* Update channel configuration */
+ if (!(ndp->flags & NCSI_DEV_RESET))
+ ncsi_reset_dev(&ndp->ndev);
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 05:20:05 +0000