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e1000: disable TSO on lem(4) and em(4)

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Disable TSO on lem(4) and em(4) until a ring stall can be debugged.

I am not able to reproduce the issue on lem(4) but disabling there in
abundance of caution in case the issue is not specific to em(4).

Reported by:	grog
This commit is contained in:
Kevin Bowling 2023-08-14 17:25:39 -07:00
parent 33469f1011
commit 797e480cba
1 changed files with 6 additions and 0 deletions
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6
sys/dev/e1000/if_em.c
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@ -906,6 +906,9 @@ em_if_attach_pre(if_ctx_t ctx)
scctx->isc_tx_csum_flags = CSUM_TCP | CSUM_UDP | CSUM_IP_TSO |
CSUM_IP6_TCP | CSUM_IP6_UDP;
/* Disable TSO on all em(4) until ring stalls can be debugged */
scctx->isc_capenable &= ~IFCAP_TSO;
/*
* Disable TSO on SPT due to errata that downclocks DMA performance
* i218-i219 Specification Update 1.5.4.5
@ -938,6 +941,9 @@ em_if_attach_pre(if_ctx_t ctx)
scctx->isc_tx_csum_flags = CSUM_TCP | CSUM_UDP | CSUM_IP_TSO |
CSUM_IP6_TCP | CSUM_IP6_UDP;
/* Disable TSO on all lem(4) until ring stalls can be debugged */
scctx->isc_capenable &= ~IFCAP_TSO;
/* 82541ER doesn't do HW tagging */
if (hw->device_id == E1000_DEV_ID_82541ER ||
hw->device_id == E1000_DEV_ID_82541ER_LOM) {