From c0b03e8399505a5aafe3a38e287213f523d890af Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Tue, 27 Jul 2021 10:43:25 -0700 Subject: [PATCH] ionic: minimize resources when under kdump When running in a small kdump kernel, we can play nice and minimize our resource use to help make sure that kdump is successful in its mission. Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- drivers/net/ethernet/pensando/ionic/ionic_lif.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 537c2907b91e..453994e57d86 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "ionic.h" #include "ionic_bus.h" @@ -2834,8 +2835,14 @@ int ionic_lif_alloc(struct ionic *ionic) lif->ionic = ionic; lif->index = 0; - lif->ntxq_descs = IONIC_DEF_TXRX_DESC; - lif->nrxq_descs = IONIC_DEF_TXRX_DESC; + + if (is_kdump_kernel()) { + lif->ntxq_descs = IONIC_MIN_TXRX_DESC; + lif->nrxq_descs = IONIC_MIN_TXRX_DESC; + } else { + lif->ntxq_descs = IONIC_DEF_TXRX_DESC; + lif->nrxq_descs = IONIC_DEF_TXRX_DESC; + } /* Convert the default coalesce value to actual hw resolution */ lif->rx_coalesce_usecs = IONIC_ITR_COAL_USEC_DEFAULT; @@ -3519,6 +3526,7 @@ int ionic_lif_size(struct ionic *ionic) unsigned int min_intrs; int err; + /* retrieve basic values from FW */ lc = &ident->lif.eth.config; dev_nintrs = le32_to_cpu(ident->dev.nintrs); neqs_per_lif = le32_to_cpu(ident->lif.rdma.eq_qtype.qid_count); @@ -3526,6 +3534,15 @@ int ionic_lif_size(struct ionic *ionic) ntxqs_per_lif = le32_to_cpu(lc->queue_count[IONIC_QTYPE_TXQ]); nrxqs_per_lif = le32_to_cpu(lc->queue_count[IONIC_QTYPE_RXQ]); + /* limit values to play nice with kdump */ + if (is_kdump_kernel()) { + dev_nintrs = 2; + neqs_per_lif = 0; + nnqs_per_lif = 0; + ntxqs_per_lif = 1; + nrxqs_per_lif = 1; + } + /* reserve last queue id for hardware timestamping */ if (lc->features & cpu_to_le64(IONIC_ETH_HW_TIMESTAMP)) { if (ntxqs_per_lif <= 1 || nrxqs_per_lif <= 1) { -- 2.11.0