[PATCH v2 1/2] net/ncsi: General state debugging
Samuel Mendoza-Jonas
sam at mendozajonas.com
Wed Nov 8 11:35:32 AEDT 2017
While relatively noisy this helps to debug NCSI state transitions and
the state of channels beyond the existing "down" or "up" messages that
the driver currently has.
Signed-off-by: Samuel Mendoza-Jonas <sam at mendozajonas.com>
---
net/ncsi/ncsi-aen.c | 15 ++++++++++++++-
net/ncsi/ncsi-manage.c | 52 +++++++++++++++++++++++++++++++++++++++++++-------
net/ncsi/ncsi-rsp.c | 10 +++++++++-
3 files changed, 68 insertions(+), 9 deletions(-)
diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c
index f135938bf781..67e708e98ccf 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -73,6 +73,9 @@ static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp,
ncm->data[2] = data;
ncm->data[4] = ntohl(lsc->oem_status);
+ netdev_info(ndp->ndev.dev, "NCSI: LSC AEN - channel %u state %s\n",
+ nc->id, data & 0x1 ? "up" : "down");
+
chained = !list_empty(&nc->link);
state = nc->state;
spin_unlock_irqrestore(&nc->lock, flags);
@@ -145,6 +148,8 @@ static int ncsi_aen_handler_hncdsc(struct ncsi_dev_priv *ndp,
ncm = &nc->modes[NCSI_MODE_LINK];
hncdsc = (struct ncsi_aen_hncdsc_pkt *)h;
ncm->data[3] = ntohl(hncdsc->status);
+ netdev_info(ndp->ndev.dev, "NCSI: HNCDSC AEN - channel %u state %s\n",
+ nc->id, ncm->data[3] & 0x3 ? "up" : "down");
if (!list_empty(&nc->link) ||
nc->state != NCSI_CHANNEL_ACTIVE) {
spin_unlock_irqrestore(&nc->lock, flags);
@@ -212,10 +217,18 @@ int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb)
}
ret = ncsi_validate_aen_pkt(h, nah->payload);
- if (ret)
+ if (ret) {
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: 'bad' packet ignored for AEN type 0x%x\n",
+ h->type);
goto out;
+ }
ret = nah->handler(ndp, h);
+ if (ret)
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Handler for AEN type 0x%x returned %d\n",
+ h->type, ret);
out:
consume_skb(skb);
return ret;
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index 8cae2f233272..97b76f26bde7 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -226,6 +226,8 @@ static void ncsi_channel_monitor(unsigned long data)
case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
break;
default:
+ netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
+ nc->id);
if (!(ndp->flags & NCSI_DEV_HWA)) {
ncsi_report_link(ndp, true);
ndp->flags |= NCSI_DEV_RESHUFFLE;
@@ -769,8 +771,11 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
nca.package = np->id;
nca.channel = NCSI_RESERVED_CHANNEL;
ret = ncsi_xmit_cmd(&nca);
- if (ret)
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD_SP\n");
goto error;
+ }
nd->state = ncsi_dev_state_config_cis;
break;
@@ -782,8 +787,11 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
nca.package = np->id;
nca.channel = nc->id;
ret = ncsi_xmit_cmd(&nca);
- if (ret)
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD_CIS\n");
goto error;
+ }
nd->state = ncsi_dev_state_config_clear_vids;
break;
@@ -880,10 +888,16 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
}
ret = ncsi_xmit_cmd(&nca);
- if (ret)
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD %x\n",
+ nca.type);
goto error;
+ }
break;
case ncsi_dev_state_config_done:
+ netdev_printk(KERN_DEBUG, ndp->ndev.dev,
+ "NCSI: channel %u config done\n", nc->id);
spin_lock_irqsave(&nc->lock, flags);
if (nc->reconfigure_needed) {
/* This channel's configuration has been updated
@@ -911,6 +925,9 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
} else {
hot_nc = NULL;
nc->state = NCSI_CHANNEL_INACTIVE;
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: channel %u link down after config\n",
+ nc->id);
}
spin_unlock_irqrestore(&nc->lock, flags);
@@ -923,8 +940,8 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
ncsi_process_next_channel(ndp);
break;
default:
- netdev_warn(dev, "Wrong NCSI state 0x%x in config\n",
- nd->state);
+ netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
+ nd->state);
}
return;
@@ -976,10 +993,17 @@ static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
}
if (!found) {
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: No channel found with link\n");
ncsi_report_link(ndp, true);
return -ENODEV;
}
+ ncm = &found->modes[NCSI_MODE_LINK];
+ netdev_printk(KERN_DEBUG, ndp->ndev.dev,
+ "NCSI: Channel %u added to queue (link %s)\n",
+ found->id, ncm->data[2] & 0x1 ? "up" : "down");
+
out:
spin_lock_irqsave(&ndp->lock, flags);
list_add_tail_rcu(&found->link, &ndp->channel_queue);
@@ -1041,6 +1065,8 @@ static int ncsi_enable_hwa(struct ncsi_dev_priv *ndp)
/* We can have no channels in extremely case */
if (list_empty(&ndp->channel_queue)) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: No available channels for HWA\n");
ncsi_report_link(ndp, false);
return -ENOENT;
}
@@ -1209,6 +1235,9 @@ static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
return;
error:
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit cmd 0x%x during probe\n",
+ nca.type);
ncsi_report_link(ndp, true);
}
@@ -1262,10 +1291,14 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
switch (old_state) {
case NCSI_CHANNEL_INACTIVE:
ndp->ndev.state = ncsi_dev_state_config;
+ netdev_info(ndp->ndev.dev, "NCSI: configuring channel %u\n",
+ nc->id);
ncsi_configure_channel(ndp);
break;
case NCSI_CHANNEL_ACTIVE:
ndp->ndev.state = ncsi_dev_state_suspend;
+ netdev_info(ndp->ndev.dev, "NCSI: suspending channel %u\n",
+ nc->id);
ncsi_suspend_channel(ndp);
break;
default:
@@ -1285,6 +1318,8 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
return ncsi_choose_active_channel(ndp);
}
+ netdev_printk(KERN_DEBUG, ndp->ndev.dev,
+ "NCSI: No more channels to process\n");
ncsi_report_link(ndp, false);
return -ENODEV;
}
@@ -1566,10 +1601,12 @@ int ncsi_start_dev(struct ncsi_dev *nd)
return 0;
}
- if (ndp->flags & NCSI_DEV_HWA)
+ if (ndp->flags & NCSI_DEV_HWA) {
+ netdev_info(ndp->ndev.dev, "NCSI: Enabling HWA mode\n");
ret = ncsi_enable_hwa(ndp);
- else
+ } else {
ret = ncsi_choose_active_channel(ndp);
+ }
return ret;
}
@@ -1600,6 +1637,7 @@ void ncsi_stop_dev(struct ncsi_dev *nd)
}
}
+ netdev_printk(KERN_DEBUG, ndp->ndev.dev, "NCSI: Stopping device\n");
ncsi_report_link(ndp, true);
}
EXPORT_SYMBOL_GPL(ncsi_stop_dev);
diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index 927dad4759d1..58186c4102f0 100644
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -1032,11 +1032,19 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
if (payload < 0)
payload = ntohs(hdr->length);
ret = ncsi_validate_rsp_pkt(nr, payload);
- if (ret)
+ if (ret) {
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: 'bad' packet ignored for type 0x%x\n",
+ hdr->type);
goto out;
+ }
/* Process the packet */
ret = nrh->handler(nr);
+ if (ret)
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Handler for packet type 0x%x returned %d\n",
+ hdr->type, ret);
out:
ncsi_free_request(nr);
return ret;
--
2.14.3
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