[PATCH net-next 11/11] ibmvnic: Reset sub-crqs during driver reset
From: Nathan Fontenot <hidden>
Date: 2017-05-26 14:42:57
Subsystem:
ibm power sriov virtual nic device driver, linux for powerpc (32-bit and 64-bit), networking drivers, the rest · Maintainers:
Haren Myneni, Rick Lindsley, Madhavan Srinivasan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
When the ibmvnic driver is resetting, we can just reset the sub crqs instead of releasing all of their resources and re-allocting them. Signed-off-by: Nathan Fontenot <redacted> --- drivers/net/ethernet/ibm/ibmvnic.c | 46 ++++++++++++++++++++++++++++++++++-- 1 file changed, 43 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5661a04..8dcf580 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c@@ -1320,8 +1320,6 @@ static int do_reset(struct ibmvnic_adapter *adapter, */ adapter->state = VNIC_PROBED; - release_sub_crqs(adapter); - rc = ibmvnic_init(adapter); if (rc) return 0;
@@ -1728,6 +1726,45 @@ static void ibmvnic_get_ethtool_stats(struct net_device *dev, /* Routines for managing CRQs/sCRQs */ +static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + int rc; + + if (scrq->irq) { + free_irq(scrq->irq, scrq); + irq_dispose_mapping(scrq->irq); + scrq->irq = 0; + } + + memset(scrq->msgs, 0, 2 * PAGE_SIZE); + scrq->cur = 0; + + rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, + 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); + return rc; +} + +static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) +{ + int i, rc; + + for (i = 0; i < adapter->req_tx_queues; i++) { + rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); + if (rc) + return rc; + } + + for (i = 0; i < adapter->req_rx_queues; i++) { + rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); + if (rc) + return rc; + } + + rc = init_sub_crq_irqs(adapter); + return rc; +} + static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, struct ibmvnic_sub_crq_queue *scrq) {
@@ -3607,7 +3644,10 @@ static int ibmvnic_init(struct ibmvnic_adapter *adapter) return -1; } - rc = init_sub_crqs(adapter); + if (adapter->resetting) + rc = reset_sub_crq_queues(adapter); + else + rc = init_sub_crqs(adapter); if (rc) { dev_err(dev, "Initialization of sub crqs failed\n"); release_crq_queue(adapter);