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Message-Id: <20190829182720.68419-14-snelson@pensando.io>
Date: Thu, 29 Aug 2019 11:27:14 -0700
From: Shannon Nelson <snelson@...sando.io>
To: snelson@...sando.io, netdev@...r.kernel.org, davem@...emloft.net
Subject: [PATCH v6 net-next 13/19] ionic: Add async link status check and basic stats
Add code to handle the link status event, and wire up the
basic netdev hardware stats.
Signed-off-by: Shannon Nelson <snelson@...sando.io>
---
.../net/ethernet/pensando/ionic/ionic_lif.c | 116 +++++++++++++++++-
.../net/ethernet/pensando/ionic/ionic_lif.h | 1 +
2 files changed, 111 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 21925c156277..71e053c2df63 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -15,6 +15,7 @@
static void ionic_lif_rx_mode(struct ionic_lif *lif, unsigned int rx_mode);
static int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr);
static int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr);
+static void ionic_link_status_check(struct ionic_lif *lif);
static void ionic_lif_deferred_work(struct work_struct *work)
{
@@ -41,6 +42,9 @@ static void ionic_lif_deferred_work(struct work_struct *work)
case IONIC_DW_TYPE_RX_ADDR_DEL:
ionic_lif_addr_del(lif, w->addr);
break;
+ case IONIC_DW_TYPE_LINK_STATUS:
+ ionic_link_status_check(lif);
+ break;
default:
break;
}
@@ -58,6 +62,54 @@ static void ionic_lif_deferred_enqueue(struct ionic_deferred *def,
schedule_work(&def->work);
}
+static void ionic_link_status_check(struct ionic_lif *lif)
+{
+ struct net_device *netdev = lif->netdev;
+ u16 link_status;
+ bool link_up;
+
+ link_status = le16_to_cpu(lif->info->status.link_status);
+ link_up = link_status == IONIC_PORT_OPER_STATUS_UP;
+
+ /* filter out the no-change cases */
+ if (link_up == netif_carrier_ok(netdev))
+ goto link_out;
+
+ if (link_up) {
+ netdev_info(netdev, "Link up - %d Gbps\n",
+ le32_to_cpu(lif->info->status.link_speed) / 1000);
+
+ } else {
+ netdev_info(netdev, "Link down\n");
+
+ /* carrier off first to avoid watchdog timeout */
+ netif_carrier_off(netdev);
+ }
+
+link_out:
+ clear_bit(IONIC_LIF_LINK_CHECK_REQUESTED, lif->state);
+}
+
+static void ionic_link_status_check_request(struct ionic_lif *lif)
+{
+ struct ionic_deferred_work *work;
+
+ /* we only need one request outstanding at a time */
+ if (test_and_set_bit(IONIC_LIF_LINK_CHECK_REQUESTED, lif->state))
+ return;
+
+ if (in_interrupt()) {
+ work = kzalloc(sizeof(*work), GFP_ATOMIC);
+ if (!work)
+ return;
+
+ work->type = IONIC_DW_TYPE_LINK_STATUS;
+ ionic_lif_deferred_enqueue(&lif->deferred, work);
+ } else {
+ ionic_link_status_check(lif);
+ }
+}
+
static irqreturn_t ionic_isr(int irq, void *data)
{
struct napi_struct *napi = data;
@@ -382,12 +434,7 @@ static bool ionic_notifyq_service(struct ionic_cq *cq,
switch (le16_to_cpu(comp->event.ecode)) {
case IONIC_EVENT_LINK_CHANGE:
- netdev_info(netdev, "Notifyq IONIC_EVENT_LINK_CHANGE eid=%lld\n",
- eid);
- netdev_info(netdev,
- " link_status=%d link_speed=%d\n",
- le16_to_cpu(comp->link_change.link_status),
- le32_to_cpu(comp->link_change.link_speed));
+ ionic_link_status_check_request(lif);
break;
case IONIC_EVENT_RESET:
netdev_info(netdev, "Notifyq IONIC_EVENT_RESET eid=%lld\n",
@@ -446,6 +493,59 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget)
return max(n_work, a_work);
}
+static void ionic_get_stats64(struct net_device *netdev,
+ struct rtnl_link_stats64 *ns)
+{
+ struct ionic_lif *lif = netdev_priv(netdev);
+ struct ionic_lif_stats *ls;
+
+ memset(ns, 0, sizeof(*ns));
+ ls = &lif->info->stats;
+
+ ns->rx_packets = le64_to_cpu(ls->rx_ucast_packets) +
+ le64_to_cpu(ls->rx_mcast_packets) +
+ le64_to_cpu(ls->rx_bcast_packets);
+
+ ns->tx_packets = le64_to_cpu(ls->tx_ucast_packets) +
+ le64_to_cpu(ls->tx_mcast_packets) +
+ le64_to_cpu(ls->tx_bcast_packets);
+
+ ns->rx_bytes = le64_to_cpu(ls->rx_ucast_bytes) +
+ le64_to_cpu(ls->rx_mcast_bytes) +
+ le64_to_cpu(ls->rx_bcast_bytes);
+
+ ns->tx_bytes = le64_to_cpu(ls->tx_ucast_bytes) +
+ le64_to_cpu(ls->tx_mcast_bytes) +
+ le64_to_cpu(ls->tx_bcast_bytes);
+
+ ns->rx_dropped = le64_to_cpu(ls->rx_ucast_drop_packets) +
+ le64_to_cpu(ls->rx_mcast_drop_packets) +
+ le64_to_cpu(ls->rx_bcast_drop_packets);
+
+ ns->tx_dropped = le64_to_cpu(ls->tx_ucast_drop_packets) +
+ le64_to_cpu(ls->tx_mcast_drop_packets) +
+ le64_to_cpu(ls->tx_bcast_drop_packets);
+
+ ns->multicast = le64_to_cpu(ls->rx_mcast_packets);
+
+ ns->rx_over_errors = le64_to_cpu(ls->rx_queue_empty);
+
+ ns->rx_missed_errors = le64_to_cpu(ls->rx_dma_error) +
+ le64_to_cpu(ls->rx_queue_disabled) +
+ le64_to_cpu(ls->rx_desc_fetch_error) +
+ le64_to_cpu(ls->rx_desc_data_error);
+
+ ns->tx_aborted_errors = le64_to_cpu(ls->tx_dma_error) +
+ le64_to_cpu(ls->tx_queue_disabled) +
+ le64_to_cpu(ls->tx_desc_fetch_error) +
+ le64_to_cpu(ls->tx_desc_data_error);
+
+ ns->rx_errors = ns->rx_over_errors +
+ ns->rx_missed_errors;
+
+ ns->tx_errors = ns->tx_aborted_errors;
+}
+
static int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr)
{
struct ionic_admin_ctx ctx = {
@@ -981,6 +1081,8 @@ int ionic_open(struct net_device *netdev)
set_bit(IONIC_LIF_UP, lif->state);
+ ionic_link_status_check_request(lif);
+
return 0;
}
@@ -1006,6 +1108,7 @@ int ionic_stop(struct net_device *netdev)
static const struct net_device_ops ionic_netdev_ops = {
.ndo_open = ionic_open,
.ndo_stop = ionic_stop,
+ .ndo_get_stats64 = ionic_get_stats64,
.ndo_set_rx_mode = ionic_set_rx_mode,
.ndo_set_features = ionic_set_features,
.ndo_set_mac_address = ionic_set_mac_address,
@@ -1439,6 +1542,7 @@ int ionic_lifs_register(struct ionic *ionic)
return err;
}
+ ionic_link_status_check_request(ionic->master_lif);
ionic->master_lif->registered = true;
return 0;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 7da7d4a3fdf0..135c1a27e589 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -84,6 +84,7 @@ struct ionic_deferred {
enum ionic_lif_state_flags {
IONIC_LIF_INITED,
IONIC_LIF_UP,
+ IONIC_LIF_LINK_CHECK_REQUESTED,
IONIC_LIF_QUEUE_RESET,
/* leave this as last */
--
2.17.1
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