From e26ca4b535820b1445dcef3c0f82b3fb5b45108b Mon Sep 17 00:00:00 2001 From: Ivan Babrou Date: Wed, 20 Jan 2021 13:27:59 -0800 Subject: sfc: reduce the number of requested xdp ev queues Without this change the driver tries to allocate too many queues, breaching the number of available msi-x interrupts on machines with many logical cpus and default adapter settings: Insufficient resources for 12 XDP event queues (24 other channels, max 32) Which in turn triggers EINVAL on XDP processing: sfc 0000:86:00.0 ext0: XDP TX failed (-22) Signed-off-by: Ivan Babrou Acked-by: Edward Cree Link: https://lore.kernel.org/r/20210120212759.81548-1-ivan@cloudflare.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/sfc/efx_channels.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/net/ethernet/sfc') diff --git a/drivers/net/ethernet/sfc/efx_channels.c b/drivers/net/ethernet/sfc/efx_channels.c index a4a626e9cd9a..1bfeee283ea9 100644 --- a/drivers/net/ethernet/sfc/efx_channels.c +++ b/drivers/net/ethernet/sfc/efx_channels.c @@ -17,6 +17,7 @@ #include "rx_common.h" #include "nic.h" #include "sriov.h" +#include "workarounds.h" /* This is the first interrupt mode to try out of: * 0 => MSI-X @@ -137,6 +138,7 @@ static int efx_allocate_msix_channels(struct efx_nic *efx, { unsigned int n_channels = parallelism; int vec_count; + int tx_per_ev; int n_xdp_tx; int n_xdp_ev; @@ -149,9 +151,9 @@ static int efx_allocate_msix_channels(struct efx_nic *efx, * multiple tx queues, assuming tx and ev queues are both * maximum size. */ - + tx_per_ev = EFX_MAX_EVQ_SIZE / EFX_TXQ_MAX_ENT(efx); n_xdp_tx = num_possible_cpus(); - n_xdp_ev = DIV_ROUND_UP(n_xdp_tx, EFX_MAX_TXQ_PER_CHANNEL); + n_xdp_ev = DIV_ROUND_UP(n_xdp_tx, tx_per_ev); vec_count = pci_msix_vec_count(efx->pci_dev); if (vec_count < 0) -- cgit v1.2.1