From: Sathesh Edara <sedara@marvell.com>
To: <sburla@marvell.com>, <jerinj@marvell.com>, <sedara@marvell.com>,
Radha Mohan Chintakuntla <radhac@marvell.com>,
Veerasenareddy Burru <vburru@marvell.com>
Cc: <dev@dpdk.org>
Subject: [PATCH v3 07/11] net/octeon_ep: flush pending DMA operations
Date: Mon, 24 Apr 2023 05:28:30 -0700 [thread overview]
Message-ID: <20230424122835.39493-8-sedara@marvell.com> (raw)
In-Reply-To: <20230424122835.39493-1-sedara@marvell.com>
Flushes the pending DMA operations while reading
the packets by reading control and status register.
Signed-off-by: Sathesh Edara <sedara@marvell.com>
---
drivers/net/octeon_ep/otx_ep_common.h | 8 ++++++++
drivers/net/octeon_ep/otx_ep_rxtx.c | 4 ++++
2 files changed, 12 insertions(+)
diff --git a/drivers/net/octeon_ep/otx_ep_common.h b/drivers/net/octeon_ep/otx_ep_common.h
index 76528ed49d..444136923f 100644
--- a/drivers/net/octeon_ep/otx_ep_common.h
+++ b/drivers/net/octeon_ep/otx_ep_common.h
@@ -345,6 +345,14 @@ struct otx_ep_droq {
*/
void *pkts_sent_reg;
+ /** Handle DMA incompletion during pkt reads.
+ * This variable is used to initiate a sent_reg_read
+ * that completes pending dma
+ * this variable is used as lvalue so compiler cannot optimize
+ * the reads.
+ */
+ uint32_t sent_reg_val;
+
/* Statistics for this DROQ. */
struct otx_ep_droq_stats stats;
diff --git a/drivers/net/octeon_ep/otx_ep_rxtx.c b/drivers/net/octeon_ep/otx_ep_rxtx.c
index c4153bd583..ca968f6fe7 100644
--- a/drivers/net/octeon_ep/otx_ep_rxtx.c
+++ b/drivers/net/octeon_ep/otx_ep_rxtx.c
@@ -917,6 +917,10 @@ otx_ep_droq_read_packet(struct otx_ep_device *otx_ep,
struct rte_mbuf *first_buf = NULL;
struct rte_mbuf *last_buf = NULL;
+ /* csr read helps to flush pending dma */
+ droq->sent_reg_val = rte_read32(droq->pkts_sent_reg);
+ rte_rmb();
+
while (pkt_len < total_pkt_len) {
int cpy_len = 0;
--
2.31.1
next prev parent reply other threads:[~2023-04-24 12:29 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-04 14:18 [PATCH v1 0/9] extend octeon ep driver functionality Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 1/9] net/octeon_ep: support cnf95n and cnf95o SoC Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 00/10] extend octeon ep driver functionality Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 01/10] net/octeon_ep: support cnf95n and cnf95o SoC Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 00/11] extend octeon ep driver functionality Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 01/11] net/octeon_ep: support cnf95n and cnf95o SoC Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 02/11] net/octeon_ep: support CNX10K series SoC Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 03/11] net/octeon_ep: support error propagation Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 04/11] net/octeon_ep: support IQ/OQ reset Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 05/11] devtools: add acronym in dictionary for commit checks Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 06/11] net/octeon_ep: support ISM Sathesh Edara
2023-04-24 12:28 ` Sathesh Edara [this message]
2023-04-24 12:28 ` [PATCH v3 08/11] net/octeon_ep: update queue size checks Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 09/11] net/octeon_ep: support mailbox between VF and PF Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 10/11] net/octeon_ep: set watermark for output queues Sathesh Edara
2023-04-24 12:28 ` [PATCH v3 11/11] net/octeon_ep: set secondary process dev ops Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 02/10] net/octeon_ep: support CNX10K series SoC Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 03/10] net/octeon_ep: support error propagation Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 04/10] net/octeon_ep: support IQ/OQ reset Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 05/10] net/octeon_ep: support ISM Sathesh Edara
2023-04-21 4:56 ` Jerin Jacob
2023-04-05 14:25 ` [PATCH v2 06/10] net/octeon_ep: fix DMA incompletion Sathesh Edara
2023-04-21 4:51 ` Jerin Jacob
2023-04-05 14:25 ` [PATCH v2 07/10] net/octeon_ep: update queue size checks Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 08/10] net/octeon_ep: support Mailbox between VF and PF Sathesh Edara
2023-04-21 5:00 ` Jerin Jacob
2023-04-05 14:25 ` [PATCH v2 09/10] net/octeon_ep: set watermark for output queues Sathesh Edara
2023-04-05 14:25 ` [PATCH v2 10/10] net/octeon_ep: set secondary process dev ops Sathesh Edara
2023-04-21 5:03 ` Jerin Jacob
2023-04-24 12:55 ` [PATCH v3 00/11] extend octeon ep driver functionality Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 01/11] net/octeon_ep: support cnf95n and cnf95o SoC Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 02/11] net/octeon_ep: support CNX10K series SoC Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 03/11] net/octeon_ep: support error propagation Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 04/11] net/octeon_ep: support IQ/OQ reset Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 05/11] devtools: add acronym in dictionary for commit checks Sathesh Edara
2023-05-03 7:16 ` Jerin Jacob
2023-04-24 12:55 ` [PATCH v3 06/11] net/octeon_ep: support ISM Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 07/11] net/octeon_ep: flush pending DMA operations Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 08/11] net/octeon_ep: update queue size checks Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 09/11] net/octeon_ep: support mailbox between VF and PF Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 10/11] net/octeon_ep: set watermark for output queues Sathesh Edara
2023-04-24 12:55 ` [PATCH v3 11/11] net/octeon_ep: set secondary process dev ops Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 2/9] net/octeon_ep: support CNX10K series SoC Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 3/9] net/octeon_ep: support error propagation Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 4/9] net/octeon_ep: support IQ/OQ reset Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 5/9] net/octeon_ep: support ISM Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 6/9] net/octeon_ep: fix DMA incompletion Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 7/9] net/octeon_ep: update queue size checks Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 8/9] net/octeon_ep: support Mailbox between VF and PF Sathesh Edara
2023-04-04 14:18 ` [PATCH v1 9/9] net/octeon_ep: set watermark for output queues Sathesh Edara
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