netdev - [PATCH net-next] cxgb4: notify fatal error to uld drivers

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Message-Id: <1521190377-22823-1-git-send-email-ganeshgr@chelsio.com>
Date:   Fri, 16 Mar 2018 14:22:57 +0530
From:   Ganesh Goudar <ganeshgr@...lsio.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     nirranjan@...lsio.com, dledford@...hat.com, jgg@...pe.ca,
        linux-rdma@...r.kernel.org, swise@...ngridcomputing.com,
        indranil@...lsio.com, venkatesh@...lsio.com,
        Ganesh Goudar <ganeshgr@...lsio.com>
Subject: [PATCH net-next] cxgb4: notify fatal error to uld drivers

notify uld drivers if the adapter encounters fatal
error.

Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com>
---
 drivers/infiniband/hw/cxgb4/device.c            |  1 +
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h      |  1 +
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 10 ++++++++++
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h  |  3 ++-
 4 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index 7a9d0de..e96771d 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -1217,6 +1217,7 @@ static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
 		if (ctx->dev)
 			c4iw_remove(ctx);
 		break;
+	case CXGB4_STATE_FATAL_ERROR:
 	case CXGB4_STATE_START_RECOVERY:
 		pr_info("%s: Fatal Error\n", pci_name(ctx->lldi.pdev));
 		if (ctx->dev) {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index b2df0ff..a5c0a64 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -917,6 +917,7 @@ struct adapter {
 	struct work_struct tid_release_task;
 	struct work_struct db_full_task;
 	struct work_struct db_drop_task;
+	struct work_struct fatal_err_notify_task;
 	bool tid_release_task_busy;
 
 	/* lock for mailbox cmd list */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 5a349e15..72ec3f7 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3255,6 +3255,14 @@ static const struct ethtool_ops cxgb4_mgmt_ethtool_ops = {
 	.get_drvinfo       = cxgb4_mgmt_get_drvinfo,
 };
 
+static void notify_fatal_err(struct work_struct *work)
+{
+	struct adapter *adap;
+
+	adap = container_of(work, struct adapter, fatal_err_notify_task);
+	notify_ulds(adap, CXGB4_STATE_FATAL_ERROR);
+}
+
 void t4_fatal_err(struct adapter *adap)
 {
 	int port;
@@ -3279,6 +3287,7 @@ void t4_fatal_err(struct adapter *adap)
 		netif_carrier_off(dev);
 	}
 	dev_alert(adap->pdev_dev, "encountered fatal error, adapter stopped\n");
+	queue_work(adap->workq, &adap->fatal_err_notify_task);
 }
 
 static void setup_memwin(struct adapter *adap)
@@ -5479,6 +5488,7 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	INIT_WORK(&adapter->tid_release_task, process_tid_release_list);
 	INIT_WORK(&adapter->db_full_task, process_db_full);
 	INIT_WORK(&adapter->db_drop_task, process_db_drop);
+	INIT_WORK(&adapter->fatal_err_notify_task, notify_fatal_err);
 
 	err = t4_prep_adapter(adapter);
 	if (err)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
index a14e8db..788146c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
@@ -257,7 +257,8 @@ enum cxgb4_state {
 	CXGB4_STATE_UP,
 	CXGB4_STATE_START_RECOVERY,
 	CXGB4_STATE_DOWN,
-	CXGB4_STATE_DETACH
+	CXGB4_STATE_DETACH,
+	CXGB4_STATE_FATAL_ERROR
 };
 
 enum cxgb4_control {
-- 
2.1.0