[dpdk-stable] patch 'net/mlx4: fix port attach in secondary process' has been queued to stable release 19.11.7

[Christian Ehrhardt <christian.ehrhardt@canonical.com>]

Hi,

FYI, your patch has been queued to stable release 19.11.7

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/06/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/7bae8b8ba1a53e5a4a8edae243364c90dfd105e7

Thanks.

Christian Ehrhardt <christian.ehrhardt@canonical.com>

---
From 7bae8b8ba1a53e5a4a8edae243364c90dfd105e7 Mon Sep 17 00:00:00 2001
From: Suanming Mou <suanmingm@nvidia.com>
Date: Sun, 24 Jan 2021 19:02:06 +0800
Subject: [PATCH] net/mlx4: fix port attach in secondary process

[ upstream commit ed879add1ba7529d69c69a35d3260114f871750a ]

Currently, the secondary process port UAR register mapping used by Tx
queue is done during port initializing.

Unluckily, in port hot-plug case, the secondary process will be
requested to initialize the port when primary process probe the port.
At that time, the port Tx queue number is still not configured, the
secondary process get Tx queue number as 0. This causes the UAR register
not be mapped as secondary process get Tx queue number 0.

This commit adds the check of Tx queue number in secondary process when
port starts is requested. Once the Tx queue number is not matching, do
UAR mapping with the latest Tx queue number.

Fixes: 0203d33a1059 ("net/mlx4: support secondary process")

Signed-off-by: Suanming Mou <suanmingm@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 drivers/net/mlx4/mlx4.c      | 10 +++++-----
 drivers/net/mlx4/mlx4.h      |  4 ++++
 drivers/net/mlx4/mlx4_mp.c   | 24 ++++++++++++++++++++++++
 drivers/net/mlx4/mlx4_rxtx.h |  1 +
 drivers/net/mlx4/mlx4_txq.c  | 28 ++++++++++++++++++++++++++++
 5 files changed, 62 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index c14c357816..4479022a42 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -198,7 +198,7 @@ mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
  * @return
  *   0 on success, a negative errno value otherwise and rte_errno is set.
  */
-static int
+int
 mlx4_proc_priv_init(struct rte_eth_dev *dev)
 {
 	struct mlx4_proc_priv *ppriv;
@@ -210,13 +210,13 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
 	 */
 	ppriv_size = sizeof(struct mlx4_proc_priv) +
 		     dev->data->nb_tx_queues * sizeof(void *);
-	ppriv = rte_malloc_socket("mlx4_proc_priv", ppriv_size,
-				  RTE_CACHE_LINE_SIZE, dev->device->numa_node);
+	ppriv = rte_zmalloc_socket("mlx4_proc_priv", ppriv_size,
+				   RTE_CACHE_LINE_SIZE, dev->device->numa_node);
 	if (!ppriv) {
 		rte_errno = ENOMEM;
 		return -rte_errno;
 	}
-	ppriv->uar_table_sz = ppriv_size;
+	ppriv->uar_table_sz = dev->data->nb_tx_queues;
 	dev->process_private = ppriv;
 	return 0;
 }
@@ -227,7 +227,7 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
  * @param dev
  *   Pointer to Ethernet device structure.
  */
-static void
+void
 mlx4_proc_priv_uninit(struct rte_eth_dev *dev)
 {
 	if (!dev->process_private)
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index c6cb29493e..87710d3996 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -197,6 +197,10 @@ struct mlx4_priv {
 #define PORT_ID(priv) ((priv)->dev_data->port_id)
 #define ETH_DEV(priv) (&rte_eth_devices[PORT_ID(priv)])
 
+int mlx4_proc_priv_init(struct rte_eth_dev *dev);
+void mlx4_proc_priv_uninit(struct rte_eth_dev *dev);
+
+
 /* mlx4_ethdev.c */
 
 int mlx4_get_ifname(const struct mlx4_priv *priv, char (*ifname)[IF_NAMESIZE]);
diff --git a/drivers/net/mlx4/mlx4_mp.c b/drivers/net/mlx4/mlx4_mp.c
index cdb648517a..4da743d9e3 100644
--- a/drivers/net/mlx4/mlx4_mp.c
+++ b/drivers/net/mlx4/mlx4_mp.c
@@ -112,6 +112,9 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
 	const struct mlx4_mp_param *param =
 		(const struct mlx4_mp_param *)mp_msg->param;
 	struct rte_eth_dev *dev;
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+	struct mlx4_proc_priv *ppriv;
+#endif
 	int ret;
 
 	assert(rte_eal_process_type() == RTE_PROC_SECONDARY);
@@ -127,6 +130,21 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
 		rte_mb();
 		dev->tx_pkt_burst = mlx4_tx_burst;
 		dev->rx_pkt_burst = mlx4_rx_burst;
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+		ppriv = (struct mlx4_proc_priv *)dev->process_private;
+		if (ppriv->uar_table_sz != dev->data->nb_tx_queues) {
+			mlx4_tx_uar_uninit_secondary(dev);
+			mlx4_proc_priv_uninit(dev);
+			ret = mlx4_proc_priv_init(dev);
+			if (ret)
+				return -rte_errno;
+			ret = mlx4_tx_uar_init_secondary(dev, mp_msg->fds[0]);
+			if (ret) {
+				mlx4_proc_priv_uninit(dev);
+				return -rte_errno;
+			}
+		}
+#endif
 		mp_init_msg(dev, &mp_res, param->type);
 		res->result = 0;
 		ret = rte_mp_reply(&mp_res, peer);
@@ -164,6 +182,7 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
 	struct rte_mp_reply mp_rep;
 	struct mlx4_mp_param *res __rte_unused;
 	struct timespec ts = {.tv_sec = MLX4_MP_REQ_TIMEOUT_SEC, .tv_nsec = 0};
+	struct mlx4_priv *priv;
 	int ret;
 	int i;
 
@@ -176,6 +195,11 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
 		return;
 	}
 	mp_init_msg(dev, &mp_req, type);
+	if (type == MLX4_MP_REQ_START_RXTX) {
+		priv = dev->data->dev_private;
+		mp_req.num_fds = 1;
+		mp_req.fds[0] = priv->ctx->cmd_fd;
+	}
 	ret = rte_mp_request_sync(&mp_req, &mp_rep, &ts);
 	if (ret) {
 		if (rte_errno != ENOTSUP)
diff --git a/drivers/net/mlx4/mlx4_rxtx.h b/drivers/net/mlx4/mlx4_rxtx.h
index 9de6c59411..136ca56ca4 100644
--- a/drivers/net/mlx4/mlx4_rxtx.h
+++ b/drivers/net/mlx4/mlx4_rxtx.h
@@ -157,6 +157,7 @@ uint16_t mlx4_rx_burst_removed(void *dpdk_rxq, struct rte_mbuf **pkts,
 /* mlx4_txq.c */
 
 int mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev, int fd);
+void mlx4_tx_uar_uninit_secondary(struct rte_eth_dev *dev);
 uint64_t mlx4_get_tx_port_offloads(struct mlx4_priv *priv);
 int mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx,
 			uint16_t desc, unsigned int socket,
diff --git a/drivers/net/mlx4/mlx4_txq.c b/drivers/net/mlx4/mlx4_txq.c
index 01a5efd80d..824ddbd827 100644
--- a/drivers/net/mlx4/mlx4_txq.c
+++ b/drivers/net/mlx4/mlx4_txq.c
@@ -158,6 +158,27 @@ error:
 	} while (i--);
 	return -rte_errno;
 }
+
+void
+mlx4_tx_uar_uninit_secondary(struct rte_eth_dev *dev)
+{
+	struct mlx4_proc_priv *ppriv =
+			(struct mlx4_proc_priv *)dev->process_private;
+	const size_t page_size = sysconf(_SC_PAGESIZE);
+	void *addr;
+	size_t i;
+
+	if (page_size == (size_t)-1) {
+		ERROR("Failed to get mem page size");
+		return;
+	}
+	for (i = 0; i < ppriv->uar_table_sz; i++) {
+		addr = ppriv->uar_table[i];
+		if (addr)
+			munmap(RTE_PTR_ALIGN_FLOOR(addr, page_size), page_size);
+	}
+}
+
 #else
 int
 mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev __rte_unused,
@@ -168,6 +189,13 @@ mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev __rte_unused,
 	rte_errno = ENOTSUP;
 	return -rte_errno;
 }
+
+void
+mlx4_tx_uar_uninit_secondary(struct rte_eth_dev *dev __rte_unused)
+{
+	assert(rte_eal_process_type() == RTE_PROC_SECONDARY);
+	ERROR("UAR remap is not supported");
+}
 #endif
 
 /**
-- 
2.30.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-04 12:04:32.508204091 +0100
+++ 0109-net-mlx4-fix-port-attach-in-secondary-process.patch	2021-02-04 12:04:28.134789829 +0100
@@ -1 +1 @@
-From ed879add1ba7529d69c69a35d3260114f871750a Mon Sep 17 00:00:00 2001
+From 7bae8b8ba1a53e5a4a8edae243364c90dfd105e7 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit ed879add1ba7529d69c69a35d3260114f871750a ]
+
@@ -20 +21,0 @@
-Cc: stable@dpdk.org
@@ -33 +34 @@
-index 284dcb9dd0..041c1934f5 100644
+index c14c357816..4479022a42 100644
@@ -36 +37 @@
-@@ -195,7 +195,7 @@ mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
+@@ -198,7 +198,7 @@ mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
@@ -45 +46 @@
-@@ -207,13 +207,13 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
+@@ -210,13 +210,13 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
@@ -62 +63 @@
-@@ -224,7 +224,7 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
+@@ -227,7 +227,7 @@ mlx4_proc_priv_init(struct rte_eth_dev *dev)
@@ -72 +73 @@
-index 63df8fcf2b..e07b1d2386 100644
+index c6cb29493e..87710d3996 100644
@@ -87 +88 @@
-index e05da89c0e..ddf7bdb9ef 100644
+index cdb648517a..4da743d9e3 100644
@@ -90 +91 @@
-@@ -111,6 +111,9 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
+@@ -112,6 +112,9 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
@@ -99,2 +100,2 @@
- 	MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY);
-@@ -126,6 +129,21 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
+ 	assert(rte_eal_process_type() == RTE_PROC_SECONDARY);
+@@ -127,6 +130,21 @@ mp_secondary_handle(const struct rte_mp_msg *mp_msg, const void *peer)
@@ -122 +123 @@
-@@ -163,6 +181,7 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
+@@ -164,6 +182,7 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
@@ -130 +131 @@
-@@ -175,6 +194,11 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
+@@ -176,6 +195,11 @@ mp_req_on_rxtx(struct rte_eth_dev *dev, enum mlx4_mp_req_type type)
@@ -143 +144 @@
-index 7c72ce6d17..c838afc242 100644
+index 9de6c59411..136ca56ca4 100644
@@ -155 +156 @@
-index 8262071505..31ab308050 100644
+index 01a5efd80d..824ddbd827 100644
@@ -158 +159 @@
-@@ -157,6 +157,27 @@ error:
+@@ -158,6 +158,27 @@ error:
@@ -186 +187 @@
-@@ -167,6 +188,13 @@ mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev __rte_unused,
+@@ -168,6 +189,13 @@ mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev __rte_unused,