From: <pbhagavatula@marvell.com>
To: <jerinj@marvell.com>, Pavan Nikhilesh <pbhagavatula@marvell.com>,
"Shijith Thotton" <sthotton@marvell.com>
Cc: <dev@dpdk.org>
Subject: [PATCH 2/4] event/cnxk: avoid reading non cached registers
Date: Tue, 19 Jul 2022 16:41:23 +0530 [thread overview]
Message-ID: <20220719111125.8276-2-pbhagavatula@marvell.com> (raw)
In-Reply-To: <20220719111125.8276-1-pbhagavatula@marvell.com>
From: Pavan Nikhilesh <pbhagavatula@marvell.com>
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>
---
drivers/event/cnxk/cn9k_worker.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/event/cnxk/cn9k_worker.h b/drivers/event/cnxk/cn9k_worker.h
index 5782f3ed8f..653c51f616 100644
--- a/drivers/event/cnxk/cn9k_worker.h
+++ b/drivers/event/cnxk/cn9k_worker.h
@@ -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,
@@ -811,7 +820,7 @@ 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;
}
--
2.25.1
next prev parent reply other threads:[~2022-07-19 11:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 11:11 [PATCH 1/4] cnxk/net: add fc check in vector event Tx path pbhagavatula
2022-07-19 11:11 ` pbhagavatula [this message]
2022-09-21 6:15 ` [PATCH v2 1/3] event/cnxk: avoid reading non cached registers pbhagavatula
2022-09-21 6:15 ` [PATCH v2 2/3] event/cnxk: set dequeue mode to prefetch with wait pbhagavatula
2022-09-21 6:15 ` [PATCH v2 3/3] event/cnxk: disable timer resolution estimation pbhagavatula
2022-09-27 11:01 ` Jerin Jacob
2022-07-19 11:11 ` [PATCH 3/4] event/cnxk: set dequeue mode to prefetch with wait pbhagavatula
2022-07-19 11:11 ` [PATCH 4/4] event/cnxk: disable timer resolution estimation pbhagavatula
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