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ibmvnic: Reset sub-crqs during driver reset

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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 <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Fontenot 2017-05-26 10:31:12 -04:00 committed by David S. Miller
parent 8c0543adca
commit 57a49436f4
1 changed files with 43 additions and 3 deletions
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46
drivers/net/ethernet/ibm/ibmvnic.c
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@ -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 const struct ethtool_ops ibmvnic_ethtool_ops = {
/* 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);