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From: Michal Krawczyk <mk@semihalf.com>
To: dev@dpdk.org
Cc: mw@semihalf.com, mba@semihalf.com, gtzalik@amazon.com,
	evgenys@amazon.com, igorch@amazon.com,
	Michal Krawczyk <mk@semihalf.com>
Subject: [dpdk-dev] [PATCH 20/29] net/ena: disable meta caching
Date: Fri, 27 Mar 2020 11:18:14 +0100	[thread overview]
Message-ID: <20200327101823.12646-21-mk@semihalf.com> (raw)
In-Reply-To: <20200327101823.12646-1-mk@semihalf.com>

In the LLQ mode, the device can indicate that meta data descriptor
caching is disabled. In that case the driver should send valid meta
descriptor on every Tx packet.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 28 ++++++++++++++++++++++------
 drivers/net/ena/ena_ethdev.h |  2 ++
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 52eac0f1b9..45c5d26ce8 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -187,7 +187,8 @@ static int ena_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
 static uint16_t eth_ena_recv_pkts(void *rx_queue,
 				  struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
 static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count);
-static void ena_init_rings(struct ena_adapter *adapter);
+static void ena_init_rings(struct ena_adapter *adapter,
+			   bool disable_meta_caching);
 static int ena_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int ena_start(struct rte_eth_dev *dev);
 static void ena_stop(struct rte_eth_dev *dev);
@@ -303,7 +304,8 @@ static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
 
 static inline void ena_tx_mbuf_prepare(struct rte_mbuf *mbuf,
 				       struct ena_com_tx_ctx *ena_tx_ctx,
-				       uint64_t queue_offloads)
+				       uint64_t queue_offloads,
+				       bool disable_meta_caching)
 {
 	struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
 
@@ -353,6 +355,9 @@ static inline void ena_tx_mbuf_prepare(struct rte_mbuf *mbuf,
 		ena_meta->l3_hdr_len = mbuf->l3_len;
 		ena_meta->l3_hdr_offset = mbuf->l2_len;
 
+		ena_tx_ctx->meta_valid = true;
+	} else if (disable_meta_caching) {
+		memset(ena_meta, 0, sizeof(*ena_meta));
 		ena_tx_ctx->meta_valid = true;
 	} else {
 		ena_tx_ctx->meta_valid = false;
@@ -1718,8 +1723,8 @@ static int eth_ena_dev_init(struct rte_eth_dev *eth_dev)
 	const char *queue_type_str;
 	uint32_t max_num_io_queues;
 	int rc;
-
 	static int adapters_found;
+	bool disable_meta_caching;
 	bool wd_state;
 
 	eth_dev->dev_ops = &ena_dev_ops;
@@ -1802,8 +1807,16 @@ static int eth_ena_dev_init(struct rte_eth_dev *eth_dev)
 	adapter->max_rx_sgl_size = calc_queue_ctx.max_rx_sgl_size;
 	adapter->max_num_io_queues = max_num_io_queues;
 
+	if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
+		disable_meta_caching =
+			!!(get_feat_ctx.llq.accel_mode.u.get.supported_flags &
+			BIT(ENA_ADMIN_DISABLE_META_CACHING));
+	} else {
+		disable_meta_caching = false;
+	}
+
 	/* prepare ring structures */
-	ena_init_rings(adapter);
+	ena_init_rings(adapter, disable_meta_caching);
 
 	ena_config_debug_area(adapter);
 
@@ -1917,7 +1930,8 @@ static int ena_dev_configure(struct rte_eth_dev *dev)
 	return 0;
 }
 
-static void ena_init_rings(struct ena_adapter *adapter)
+static void ena_init_rings(struct ena_adapter *adapter,
+			   bool disable_meta_caching)
 {
 	size_t i;
 
@@ -1931,6 +1945,7 @@ static void ena_init_rings(struct ena_adapter *adapter)
 		ring->tx_mem_queue_type = adapter->ena_dev.tx_mem_queue_type;
 		ring->tx_max_header_size = adapter->ena_dev.tx_max_header_size;
 		ring->sgl_size = adapter->max_tx_sgl_size;
+		ring->disable_meta_caching = disable_meta_caching;
 	}
 
 	for (i = 0; i < adapter->max_num_io_queues; i++) {
@@ -2343,7 +2358,8 @@ static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		} /* there's no else as we take advantage of memset zeroing */
 
 		/* Set TX offloads flags, if applicable */
-		ena_tx_mbuf_prepare(mbuf, &ena_tx_ctx, tx_ring->offloads);
+		ena_tx_mbuf_prepare(mbuf, &ena_tx_ctx, tx_ring->offloads,
+			tx_ring->disable_meta_caching);
 
 		rte_prefetch0(tx_pkts[(sent_idx + 4) & ring_mask]);
 
diff --git a/drivers/net/ena/ena_ethdev.h b/drivers/net/ena/ena_ethdev.h
index a7f87eddc3..98ae75f5af 100644
--- a/drivers/net/ena/ena_ethdev.h
+++ b/drivers/net/ena/ena_ethdev.h
@@ -113,6 +113,8 @@ struct ena_ring {
 	uint64_t offloads;
 	u16 sgl_size;
 
+	bool disable_meta_caching;
+
 	union {
 		struct ena_stats_rx rx_stats;
 		struct ena_stats_tx tx_stats;
-- 
2.20.1


  parent reply	other threads:[~2020-03-27 10:32 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27 10:17 [dpdk-dev] [PATCH 00/29] Update ENA driver to v2.1.0 Michal Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 01/29] net/ena: check if size of buffer is at least 1400B Michal Krawczyk
2020-03-27 10:55   ` Andrew Rybchenko
2020-03-31  9:47     ` Michał Krawczyk
2020-03-27 14:51   ` Stephen Hemminger
2020-03-31  9:48     ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 02/29] net/ena/base: make allocation macros thread-safe Michal Krawczyk
2020-03-27 14:54   ` Stephen Hemminger
2020-03-31  9:47     ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 03/29] net/ena/base: prevent allocation of 0-sized memory Michal Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 04/29] net/ena/base: set default hash key Michal Krawczyk
2020-03-27 11:12   ` Andrew Rybchenko
2020-03-31  9:40     ` Michał Krawczyk
2020-03-31  9:51       ` Michał Krawczyk
2020-03-27 10:17 ` [dpdk-dev] [PATCH 05/29] net/ena/base: rework interrupt moderation Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 06/29] net/ena/base: remove extra properties strings Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 07/29] net/ena/base: add accelerated LLQ mode Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 08/29] net/ena/base: fix documentation of the functions Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 09/29] net/ena/base: fix indentation in cq polling Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 10/29] net/ena/base: add error logs when preparing Tx Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 11/29] net/ena/base: use 48-bit memory addresses in ena_com Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 12/29] net/ena/base: fix types for printing timestamps Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 13/29] net/ena/base: fix indentation of multiple defines Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 14/29] net/ena/base: update gen date and commit Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 15/29] net/ena: set IO ring size to the valid value Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 16/29] net/ena: refactor getting IO queues capabilities Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 17/29] net/ena: add support for large LLQ headers Michal Krawczyk
2020-03-27 11:20   ` Andrew Rybchenko
2020-03-31  9:42     ` Michał Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 18/29] net/ena: remove memory barriers before doorbells Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 19/29] net/ena: add Tx drops statistic Michal Krawczyk
2020-03-27 10:18 ` Michal Krawczyk [this message]
2020-03-27 10:18 ` [dpdk-dev] [PATCH 21/29] net/ena: refactor Rx path Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 22/29] net/ena: rework getting number of available descs Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 23/29] net/ena: limit refill threshold by fixed value Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 24/29] net/ena: use macros for ring idx operations Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 25/29] net/ena: refactor Tx path Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 26/29] net/ena: reuse 0 length Rx descriptor Michal Krawczyk
2020-03-27 11:29   ` Andrew Rybchenko
2020-03-31  9:45     ` Michał Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 27/29] doc: add notes on ENA usage on metal instances Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 28/29] net/ena: update copyright date Michal Krawczyk
2020-03-27 10:18 ` [dpdk-dev] [PATCH 29/29] net/ena: update version of the driver to v2.1.0 Michal Krawczyk

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