| From foo@baz Fri Mar 16 15:43:17 CET 2018 |
| From: Sunil Goutham <sgoutham@cavium.com> |
| Date: Fri, 24 Nov 2017 15:04:03 +0300 |
| Subject: net: thunderx: Set max queue count taking XDP_TX into account |
| |
| From: Sunil Goutham <sgoutham@cavium.com> |
| |
| |
| [ Upstream commit 87de083857aa269fb171ef0b39696b2888361c58 ] |
| |
| on T81 there are only 4 cores, hence setting max queue count to 4 |
| would leave nothing for XDP_TX. This patch fixes this by doubling |
| max queue count in above scenarios. |
| |
| Signed-off-by: Sunil Goutham <sgoutham@cavium.com> |
| Signed-off-by: cjacob <cjacob@caviumnetworks.com> |
| Signed-off-by: Aleksey Makarov <aleksey.makarov@cavium.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/net/ethernet/cavium/thunder/nicvf_main.c | 5 +++++ |
| 1 file changed, 5 insertions(+) |
| |
| --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c |
| +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c |
| @@ -1832,6 +1832,11 @@ static int nicvf_probe(struct pci_dev *p |
| nic->pdev = pdev; |
| nic->pnicvf = nic; |
| nic->max_queues = qcount; |
| + /* If no of CPUs are too low, there won't be any queues left |
| + * for XDP_TX, hence double it. |
| + */ |
| + if (!nic->t88) |
| + nic->max_queues *= 2; |
| |
| /* MAP VF's configuration registers */ |
| nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); |
