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event/cnxk: avoid reading non-cached registers

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Avoid reading non-cached registers in fastpath.
PENDSTATE need not be read before tag flush in Tx enqueue
context as we have additional checks prior to check for
pending flushes.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
This commit is contained in:
Pavan Nikhilesh 2022-09-21 11:45:56 +05:30 committed by Jerin Jacob
parent bd1cf51125
commit e3c0049d16
1 changed files with 10 additions and 1 deletions
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11
drivers/event/cnxk/cn9k_worker.h
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@ -156,6 +156,15 @@ cn9k_sso_hws_dual_forward_event(struct cn9k_sso_hws_dual *dws, uint64_t base,
}
}
static __rte_always_inline void
cn9k_sso_tx_tag_flush(uint64_t base)
{
if (unlikely(CNXK_TT_FROM_TAG(plt_read64(base + SSOW_LF_GWS_TAG)) ==
SSO_TT_EMPTY))
return;
plt_write64(0, base + SSOW_LF_GWS_OP_SWTAG_FLUSH);
}
static __rte_always_inline void
cn9k_wqe_to_mbuf(uint64_t wqe, const uint64_t mbuf, uint8_t port_id,
const uint32_t tag, const uint32_t flags,
@ -835,7 +844,7 @@ cn9k_sso_hws_event_tx(uint64_t base, struct rte_event *ev, uint64_t *cmd,
return 1;
}
cnxk_sso_hws_swtag_flush(base);
cn9k_sso_tx_tag_flush(base);
return 1;
}