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Message-Id: <20201106191745.1679846-1-drt@linux.ibm.com>
Date: Fri, 6 Nov 2020 14:17:45 -0500
From: Dany Madden <drt@...ux.ibm.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
Dany Madden <drt@...ux.ibm.com>
Subject: [PATCH net-next] Revert ibmvnic merge do_change_param_reset into do_reset
This reverts commit 16b5f5ce351f8709a6b518cc3cbf240c378305bf
where it restructures do_reset. There are patches being tested that
would require major rework if this is committed first.
We will resend this after the other patches have been applied.
Signed-off-by: Dany Madden <drt@...ux.ibm.com>
---
drivers/net/ethernet/ibm/ibmvnic.c | 147 ++++++++++++++++++++---------
1 file changed, 104 insertions(+), 43 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index f4167de30461..af4dfbe28d56 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1826,6 +1826,86 @@ static int ibmvnic_set_mac(struct net_device *netdev, void *p)
return rc;
}
+/**
+ * do_change_param_reset returns zero if we are able to keep processing reset
+ * events, or non-zero if we hit a fatal error and must halt.
+ */
+static int do_change_param_reset(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_rwi *rwi,
+ u32 reset_state)
+{
+ struct net_device *netdev = adapter->netdev;
+ int i, rc;
+
+ netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
+ rwi->reset_reason);
+
+ netif_carrier_off(netdev);
+ adapter->reset_reason = rwi->reset_reason;
+
+ ibmvnic_cleanup(netdev);
+
+ if (reset_state == VNIC_OPEN) {
+ rc = __ibmvnic_close(netdev);
+ if (rc)
+ return rc;
+ }
+
+ release_resources(adapter);
+ release_sub_crqs(adapter, 1);
+ release_crq_queue(adapter);
+
+ adapter->state = VNIC_PROBED;
+
+ rc = init_crq_queue(adapter);
+
+ if (rc) {
+ netdev_err(adapter->netdev,
+ "Couldn't initialize crq. rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = ibmvnic_reset_init(adapter, true);
+ if (rc)
+ return IBMVNIC_INIT_FAILED;
+
+ /* If the adapter was in PROBE state prior to the reset,
+ * exit here.
+ */
+ if (reset_state == VNIC_PROBED)
+ return 0;
+
+ rc = ibmvnic_login(netdev);
+ if (rc) {
+ adapter->state = reset_state;
+ return rc;
+ }
+
+ rc = init_resources(adapter);
+ if (rc)
+ return rc;
+
+ ibmvnic_disable_irqs(adapter);
+
+ adapter->state = VNIC_CLOSED;
+
+ if (reset_state == VNIC_CLOSED)
+ return 0;
+
+ rc = __ibmvnic_open(netdev);
+ if (rc)
+ return IBMVNIC_OPEN_FAILED;
+
+ /* refresh device's multicast list */
+ ibmvnic_set_multi(netdev);
+
+ /* kick napi */
+ for (i = 0; i < adapter->req_rx_queues; i++)
+ napi_schedule(&adapter->napi[i]);
+
+ return 0;
+}
+
/**
* do_reset returns zero if we are able to keep processing reset events, or
* non-zero if we hit a fatal error and must halt.
@@ -1841,12 +1921,10 @@ static int do_reset(struct ibmvnic_adapter *adapter,
netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
rwi->reset_reason);
- adapter->reset_reason = rwi->reset_reason;
- /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
- if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
- rtnl_lock();
+ rtnl_lock();
netif_carrier_off(netdev);
+ adapter->reset_reason = rwi->reset_reason;
old_num_rx_queues = adapter->req_rx_queues;
old_num_tx_queues = adapter->req_tx_queues;
@@ -1858,37 +1936,25 @@ static int do_reset(struct ibmvnic_adapter *adapter,
if (reset_state == VNIC_OPEN &&
adapter->reset_reason != VNIC_RESET_MOBILITY &&
adapter->reset_reason != VNIC_RESET_FAILOVER) {
- if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
- rc = __ibmvnic_close(netdev);
- if (rc)
- goto out;
- } else {
- adapter->state = VNIC_CLOSING;
-
- /* Release the RTNL lock before link state change and
- * re-acquire after the link state change to allow
- * linkwatch_event to grab the RTNL lock and run during
- * a reset.
- */
- rtnl_unlock();
- rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
- rtnl_lock();
- if (rc)
- goto out;
+ adapter->state = VNIC_CLOSING;
- if (adapter->state != VNIC_CLOSING) {
- rc = -1;
- goto out;
- }
+ /* Release the RTNL lock before link state change and
+ * re-acquire after the link state change to allow
+ * linkwatch_event to grab the RTNL lock and run during
+ * a reset.
+ */
+ rtnl_unlock();
+ rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
+ rtnl_lock();
+ if (rc)
+ goto out;
- adapter->state = VNIC_CLOSED;
+ if (adapter->state != VNIC_CLOSING) {
+ rc = -1;
+ goto out;
}
- }
- if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
- release_resources(adapter);
- release_sub_crqs(adapter, 1);
- release_crq_queue(adapter);
+ adapter->state = VNIC_CLOSED;
}
if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
@@ -1897,9 +1963,7 @@ static int do_reset(struct ibmvnic_adapter *adapter,
*/
adapter->state = VNIC_PROBED;
- if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
- rc = init_crq_queue(adapter);
- } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
+ if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
rc = ibmvnic_reenable_crq_queue(adapter);
release_sub_crqs(adapter, 1);
} else {
@@ -1939,11 +2003,7 @@ static int do_reset(struct ibmvnic_adapter *adapter,
goto out;
}
- if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
- rc = init_resources(adapter);
- if (rc)
- goto out;
- } else if (adapter->req_rx_queues != old_num_rx_queues ||
+ if (adapter->req_rx_queues != old_num_rx_queues ||
adapter->req_tx_queues != old_num_tx_queues ||
adapter->req_rx_add_entries_per_subcrq !=
old_num_rx_slots ||
@@ -2004,9 +2064,7 @@ static int do_reset(struct ibmvnic_adapter *adapter,
rc = 0;
out:
- /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
- if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
- rtnl_unlock();
+ rtnl_unlock();
return rc;
}
@@ -2140,7 +2198,10 @@ static void __ibmvnic_reset(struct work_struct *work)
}
spin_unlock_irqrestore(&adapter->state_lock, flags);
- if (adapter->force_reset_recovery) {
+ if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
+ /* CHANGE_PARAM requestor holds rtnl_lock */
+ rc = do_change_param_reset(adapter, rwi, reset_state);
+ } else if (adapter->force_reset_recovery) {
/* Transport event occurred during previous reset */
if (adapter->wait_for_reset) {
/* Previous was CHANGE_PARAM; caller locked */
--
2.18.2
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