qlcnic: Use shared interrupt vector for Tx and Rx
o VF will use shared MSI-X interrupt vector for Tx and Rx.
o When QLCNIC_INTR_SHARED flag is set Tx and Rx will
share MSI-X interrupt vector. Tx will use a separate
MSI-X interrupt vector from Rx otherwise.
Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 2f3001c..f67e8c6 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -400,7 +400,15 @@
{
struct pci_dev *pdev = adapter->pdev;
int err = -1, i;
- int max_tx_rings;
+ int max_tx_rings, tx_vector;
+
+ if (adapter->flags & QLCNIC_TX_INTR_SHARED) {
+ max_tx_rings = 0;
+ tx_vector = 0;
+ } else {
+ max_tx_rings = adapter->max_drv_tx_rings;
+ tx_vector = 1;
+ }
if (!adapter->msix_entries) {
adapter->msix_entries = kcalloc(num_msix,
@@ -423,7 +431,6 @@
if (qlcnic_83xx_check(adapter)) {
adapter->ahw->num_msix = num_msix;
/* subtract mail box and tx ring vectors */
- max_tx_rings = adapter->max_drv_tx_rings;
adapter->max_sds_rings = num_msix -
max_tx_rings - 1;
} else {
@@ -436,11 +443,11 @@
"Unable to allocate %d MSI-X interrupt vectors\n",
num_msix);
if (qlcnic_83xx_check(adapter)) {
- if (err < QLC_83XX_MINIMUM_VECTOR)
+ if (err < (QLC_83XX_MINIMUM_VECTOR - tx_vector))
return err;
- err -= (adapter->max_drv_tx_rings + 1);
+ err -= (max_tx_rings + 1);
num_msix = rounddown_pow_of_two(err);
- num_msix += (adapter->max_drv_tx_rings + 1);
+ num_msix += (max_tx_rings + 1);
} else {
num_msix = rounddown_pow_of_two(err);
}
@@ -1285,7 +1292,8 @@
}
}
if (qlcnic_83xx_check(adapter) &&
- (adapter->flags & QLCNIC_MSIX_ENABLED)) {
+ (adapter->flags & QLCNIC_MSIX_ENABLED) &&
+ !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
handler = qlcnic_msix_tx_intr;
for (ring = 0; ring < adapter->max_drv_tx_rings;
ring++) {
@@ -1321,7 +1329,8 @@
free_irq(sds_ring->irq, sds_ring);
}
}
- if (qlcnic_83xx_check(adapter)) {
+ if (qlcnic_83xx_check(adapter) &&
+ !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
for (ring = 0; ring < adapter->max_drv_tx_rings;
ring++) {
tx_ring = &adapter->tx_ring[ring];