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From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: dev@dpdk.org
Cc: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>,
	stable@dpdk.org, Andy Moreton <amoreton@xilinx.com>,
	Robert Stonehouse <rstonehouse@solarflare.com>,
	Andrew Lee <alee@solarflare.com>
Subject: [dpdk-stable] [PATCH 02/11] net/sfc: fix reading adapter state without locking
Date: Fri,  4 Jun 2021 17:42:16 +0300
Message-ID: <20210604144225.287678-3-andrew.rybchenko@oktetlabs.ru> (raw)
In-Reply-To: <20210604144225.287678-1-andrew.rybchenko@oktetlabs.ru>

From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>

Update MAC stats function reads adapter state with MAC stats locking
but without adapter locking. Add adapter locking before calling this
function and remove MAC stats locking since there's no point to have
it together with adapter locking. The second place MAC stats locking
is used is MAC stats reset function. It's called with adapter being
already locked so there's no point to use MAC stats locking anymore.

Fixes: 1caab2f1e68 ("net/sfc: add basic statistics")
Cc: stable@dpdk.org

Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
---
 drivers/net/sfc/sfc.h        |  1 -
 drivers/net/sfc/sfc_ethdev.c | 28 ++++++++++++++++++++--------
 drivers/net/sfc/sfc_port.c   |  9 +++------
 3 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/drivers/net/sfc/sfc.h b/drivers/net/sfc/sfc.h
index 546739bd4a..c7b0e5a30d 100644
--- a/drivers/net/sfc/sfc.h
+++ b/drivers/net/sfc/sfc.h
@@ -130,7 +130,6 @@ struct sfc_port {
 	unsigned int			nb_mcast_addrs;
 	uint8_t				*mcast_addrs;
 
-	rte_spinlock_t			mac_stats_lock;
 	uint64_t			*mac_stats_buf;
 	unsigned int			mac_stats_nb_supported;
 	efsys_mem_t			mac_stats_dma_mem;
diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index d4ac61ff76..d5417e5e65 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -613,7 +613,7 @@ sfc_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	uint64_t *mac_stats;
 	int ret;
 
-	rte_spinlock_lock(&port->mac_stats_lock);
+	sfc_adapter_lock(sa);
 
 	ret = sfc_port_update_mac_stats(sa);
 	if (ret != 0)
@@ -686,7 +686,7 @@ sfc_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	}
 
 unlock:
-	rte_spinlock_unlock(&port->mac_stats_lock);
+	sfc_adapter_unlock(sa);
 	SFC_ASSERT(ret >= 0);
 	return -ret;
 }
@@ -698,12 +698,15 @@ sfc_stats_reset(struct rte_eth_dev *dev)
 	struct sfc_port *port = &sa->port;
 	int rc;
 
+	sfc_adapter_lock(sa);
+
 	if (sa->state != SFC_ADAPTER_STARTED) {
 		/*
 		 * The operation cannot be done if port is not started; it
 		 * will be scheduled to be done during the next port start
 		 */
 		port->mac_stats_reset_pending = B_TRUE;
+		sfc_adapter_unlock(sa);
 		return 0;
 	}
 
@@ -711,6 +714,8 @@ sfc_stats_reset(struct rte_eth_dev *dev)
 	if (rc != 0)
 		sfc_err(sa, "failed to reset statistics (rc = %d)", rc);
 
+	sfc_adapter_unlock(sa);
+
 	SFC_ASSERT(rc >= 0);
 	return -rc;
 }
@@ -726,7 +731,7 @@ sfc_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 	unsigned int i;
 	int nstats = 0;
 
-	rte_spinlock_lock(&port->mac_stats_lock);
+	sfc_adapter_lock(sa);
 
 	rc = sfc_port_update_mac_stats(sa);
 	if (rc != 0) {
@@ -748,7 +753,7 @@ sfc_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 	}
 
 unlock:
-	rte_spinlock_unlock(&port->mac_stats_lock);
+	sfc_adapter_unlock(sa);
 
 	return nstats;
 }
@@ -789,7 +794,7 @@ sfc_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 	int ret;
 	int rc;
 
-	rte_spinlock_lock(&port->mac_stats_lock);
+	sfc_adapter_lock(sa);
 
 	if (unlikely(values == NULL) ||
 	    unlikely(ids == NULL && n < port->mac_stats_nb_supported)) {
@@ -819,7 +824,7 @@ sfc_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 	ret = nb_written;
 
 unlock:
-	rte_spinlock_unlock(&port->mac_stats_lock);
+	sfc_adapter_unlock(sa);
 
 	return ret;
 }
@@ -835,9 +840,14 @@ sfc_xstats_get_names_by_id(struct rte_eth_dev *dev,
 	unsigned int nb_written = 0;
 	unsigned int i;
 
+	sfc_adapter_lock(sa);
+
 	if (unlikely(xstats_names == NULL) ||
-	    unlikely((ids == NULL) && (size < port->mac_stats_nb_supported)))
-		return port->mac_stats_nb_supported;
+	    unlikely((ids == NULL) && (size < port->mac_stats_nb_supported))) {
+		nb_supported = port->mac_stats_nb_supported;
+		sfc_adapter_unlock(sa);
+		return nb_supported;
+	}
 
 	for (i = 0; (i < EFX_MAC_NSTATS) && (nb_written < size); ++i) {
 		if (!EFX_MAC_STAT_SUPPORTED(port->mac_stats_mask, i))
@@ -853,6 +863,8 @@ sfc_xstats_get_names_by_id(struct rte_eth_dev *dev,
 		++nb_supported;
 	}
 
+	sfc_adapter_unlock(sa);
+
 	return nb_written;
 }
 
diff --git a/drivers/net/sfc/sfc_port.c b/drivers/net/sfc/sfc_port.c
index ac117f9c48..cdc0f94f19 100644
--- a/drivers/net/sfc/sfc_port.c
+++ b/drivers/net/sfc/sfc_port.c
@@ -43,7 +43,7 @@ sfc_port_update_mac_stats(struct sfc_adapter *sa)
 	unsigned int nb_attempts = 0;
 	int rc;
 
-	SFC_ASSERT(rte_spinlock_is_locked(&port->mac_stats_lock));
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
 
 	if (sa->state != SFC_ADAPTER_STARTED)
 		return EINVAL;
@@ -103,14 +103,13 @@ sfc_port_reset_sw_stats(struct sfc_adapter *sa)
 int
 sfc_port_reset_mac_stats(struct sfc_adapter *sa)
 {
-	struct sfc_port *port = &sa->port;
 	int rc;
 
-	rte_spinlock_lock(&port->mac_stats_lock);
+	SFC_ASSERT(sfc_adapter_is_locked(sa));
+
 	rc = efx_mac_stats_clear(sa->nic);
 	if (rc == 0)
 		sfc_port_reset_sw_stats(sa);
-	rte_spinlock_unlock(&port->mac_stats_lock);
 
 	return rc;
 }
@@ -416,8 +415,6 @@ sfc_port_attach(struct sfc_adapter *sa)
 		goto fail_mcast_addr_list_buf_alloc;
 	}
 
-	rte_spinlock_init(&port->mac_stats_lock);
-
 	rc = ENOMEM;
 	port->mac_stats_buf = rte_calloc_socket("mac_stats_buf", EFX_MAC_NSTATS,
 						sizeof(uint64_t), 0,
-- 
2.30.2


  parent reply	other threads:[~2021-06-04 14:42 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210604144225.287678-1-andrew.rybchenko@oktetlabs.ru>
2021-06-04 14:42 ` [dpdk-stable] [PATCH 01/11] net/sfc: fix get xstats by ID callback to use MAC stats lock Andrew Rybchenko
2021-06-04 14:42 ` Andrew Rybchenko [this message]
2021-06-04 14:42 ` [dpdk-stable] [PATCH 03/11] ethdev: fix docs of functions getting xstats by IDs Andrew Rybchenko
2021-07-20 16:25   ` Ferruh Yigit
2021-07-22  9:12     ` Andrew Rybchenko
2021-07-23 14:19       ` Ferruh Yigit
2021-07-24 12:06         ` Andrew Rybchenko
2021-06-04 14:42 ` [dpdk-stable] [PATCH 04/11] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-07-20 16:51   ` Ferruh Yigit
2021-07-22  9:33     ` Andrew Rybchenko
2021-07-23 14:31       ` Ferruh Yigit
2021-07-23 18:47         ` Andrew Rybchenko
2021-06-04 14:42 ` [dpdk-stable] [PATCH 05/11] net/sfc: fix xstats by ID callbacks according to ethdev Andrew Rybchenko
2021-06-04 14:42 ` [dpdk-stable] [PATCH 06/11] net/sfc: fix accessing xstats by an unsorted list of IDs Andrew Rybchenko
2021-06-04 14:42 ` [dpdk-stable] [PATCH 07/11] net/sfc: fix MAC stats update to work for stopped device Andrew Rybchenko
     [not found] ` <20210722095433.1898589-1-andrew.rybchenko@oktetlabs.ru>
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 01/11] net/sfc: fix get xstats by ID callback to use MAC stats lock Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 02/11] net/sfc: fix reading adapter state without locking Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 03/11] ethdev: fix docs of functions getting xstats by IDs Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 04/11] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 05/11] net/sfc: fix xstats by ID callbacks according to ethdev Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 06/11] net/sfc: fix accessing xstats by an unsorted list of IDs Andrew Rybchenko
2021-07-22  9:54   ` [dpdk-stable] [PATCH v2 07/11] net/sfc: fix MAC stats update to work for stopped device Andrew Rybchenko
     [not found] ` <20210723131515.2317168-1-andrew.rybchenko@oktetlabs.ru>
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 01/11] net/sfc: fix get xstats by ID callback to use MAC stats lock Andrew Rybchenko
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 02/11] net/sfc: fix reading adapter state without locking Andrew Rybchenko
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 03/11] ethdev: fix docs of functions getting xstats by IDs Andrew Rybchenko
2021-07-23 14:42     ` Ferruh Yigit
2021-07-24 12:07       ` Andrew Rybchenko
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 04/11] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-07-23 14:46     ` Ferruh Yigit
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 05/11] net/sfc: fix xstats by ID callbacks according to ethdev Andrew Rybchenko
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 06/11] net/sfc: fix accessing xstats by an unsorted list of IDs Andrew Rybchenko
2021-07-23 13:15   ` [dpdk-stable] [PATCH v3 07/11] net/sfc: fix MAC stats update to work for stopped device Andrew Rybchenko
2021-07-24 12:33 ` [dpdk-stable] [PATCH v4 1/2] ethdev: fix docs of functions getting xstats by IDs Andrew Rybchenko
2021-07-24 12:33   ` [dpdk-stable] [PATCH v4 2/2] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-07-26 10:13     ` [dpdk-stable] [dpdk-dev] " Olivier Matz
2021-09-28 12:04       ` Andrew Rybchenko
2021-07-26 10:13   ` [dpdk-stable] [dpdk-dev] [PATCH v4 1/2] ethdev: fix docs of functions " Olivier Matz
2021-09-28 12:01     ` Andrew Rybchenko
2021-09-28 12:05 ` [dpdk-stable] [PATCH v5 " Andrew Rybchenko
2021-09-28 12:05   ` [dpdk-stable] [PATCH v5 2/2] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-09-28 16:50     ` Ferruh Yigit
2021-09-28 16:53       ` Andrew Rybchenko
2021-09-29  8:44         ` Ferruh Yigit
2021-09-29 11:54           ` Andrew Rybchenko
2021-09-30 12:08             ` Ferruh Yigit
2021-09-30 14:01               ` Andrew Rybchenko
2021-09-30 15:30                 ` Ferruh Yigit
2021-09-30 16:01                   ` Andrew Rybchenko
2021-09-28 16:46   ` [dpdk-stable] [PATCH v5 1/2] ethdev: fix docs of functions " Ferruh Yigit
2021-09-30 14:04 ` [dpdk-stable] [PATCH v6 1/4] " Andrew Rybchenko
2021-09-30 14:04   ` [dpdk-stable] [PATCH v6 2/4] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
     [not found] ` <20210930160156.961041-1-andrew.rybchenko@oktetlabs.ru>
2021-09-30 16:01   ` [dpdk-stable] [PATCH v7 1/5] ethdev: fix docs of functions " Andrew Rybchenko
2021-09-30 16:01   ` [dpdk-stable] [PATCH v7 2/4] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-09-30 16:01   ` [dpdk-stable] [PATCH v7 3/5] " Andrew Rybchenko
2021-09-30 16:05 ` [dpdk-stable] [PATCH v8 1/5] ethdev: fix docs of functions " Andrew Rybchenko
2021-09-30 16:05   ` [dpdk-stable] [PATCH v8 3/5] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-09-30 16:33     ` Ferruh Yigit
2021-10-01  9:07       ` Andrew Rybchenko
2021-10-01  9:07 ` [dpdk-stable] [PATCH v9 1/5] ethdev: fix docs of functions " Andrew Rybchenko
2021-10-01  9:07   ` [dpdk-stable] [PATCH v9 3/5] ethdev: fix docs of drivers callbacks " Andrew Rybchenko
2021-10-01  9:42     ` Ferruh Yigit
2021-10-01 10:22       ` Andrew Rybchenko
2021-10-06 10:37         ` Ferruh Yigit
2021-10-06 11:08   ` [dpdk-stable] [PATCH v9 1/5] ethdev: fix docs of functions " Ferruh Yigit

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