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From: longli@linuxonhyperv.com
To: Ferruh Yigit <ferruh.yigit@xilinx.com>
Cc: dev@dpdk.org, Ajay Sharma <sharmaajay@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Long Li <longli@microsoft.com>
Subject: [Patch v9 05/18] net/mana: support device removal interrupts
Date: Fri, 23 Sep 2022 19:45:33 -0700	[thread overview]
Message-ID: <1663987546-15982-6-git-send-email-longli@linuxonhyperv.com> (raw)
In-Reply-To: <1663987546-15982-1-git-send-email-longli@linuxonhyperv.com>

From: Long Li <longli@microsoft.com>

MANA supports PCI hot plug events. Add this interrupt to DPDK core so its
parent PMD can detect device removal during Azure servicing or live
migration.

Signed-off-by: Long Li <longli@microsoft.com>
---
v8:
fix coding style of function definitions.
v9:
remove unused data fields.

 doc/guides/nics/features/mana.ini |   1 +
 drivers/net/mana/mana.c           | 103 ++++++++++++++++++++++++++++++
 drivers/net/mana/mana.h           |   1 +
 3 files changed, 105 insertions(+)

diff --git a/doc/guides/nics/features/mana.ini b/doc/guides/nics/features/mana.ini
index 62554b0a0a..8043e11f99 100644
--- a/doc/guides/nics/features/mana.ini
+++ b/doc/guides/nics/features/mana.ini
@@ -7,5 +7,6 @@
 Link status          = P
 Linux                = Y
 Multiprocess aware   = Y
+Removal event        = Y
 Usage doc            = Y
 x86-64               = Y
diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c
index 90e713318a..2ee8c2dbe9 100644
--- a/drivers/net/mana/mana.c
+++ b/drivers/net/mana/mana.c
@@ -103,12 +103,18 @@ mana_dev_configure(struct rte_eth_dev *dev)
 	return 0;
 }
 
+static int mana_intr_uninstall(struct mana_priv *priv);
+
 static int
 mana_dev_close(struct rte_eth_dev *dev)
 {
 	struct mana_priv *priv = dev->data->dev_private;
 	int ret;
 
+	ret = mana_intr_uninstall(priv);
+	if (ret)
+		return ret;
+
 	ret = ibv_close_device(priv->ib_ctx);
 	if (ret) {
 		ret = errno;
@@ -340,6 +346,96 @@ mana_ibv_device_to_pci_addr(const struct ibv_device *device,
 	return 0;
 }
 
+/*
+ * Interrupt handler from IB layer to notify this device is being removed.
+ */
+static void
+mana_intr_handler(void *arg)
+{
+	struct mana_priv *priv = arg;
+	struct ibv_context *ctx = priv->ib_ctx;
+	struct ibv_async_event event;
+
+	/* Read and ack all messages from IB device */
+	while (true) {
+		if (ibv_get_async_event(ctx, &event))
+			break;
+
+		if (event.event_type == IBV_EVENT_DEVICE_FATAL) {
+			struct rte_eth_dev *dev;
+
+			dev = &rte_eth_devices[priv->port_id];
+			if (dev->data->dev_conf.intr_conf.rmv)
+				rte_eth_dev_callback_process(dev,
+					RTE_ETH_EVENT_INTR_RMV, NULL);
+		}
+
+		ibv_ack_async_event(&event);
+	}
+}
+
+static int
+mana_intr_uninstall(struct mana_priv *priv)
+{
+	int ret;
+
+	ret = rte_intr_callback_unregister(priv->intr_handle,
+					   mana_intr_handler, priv);
+	if (ret <= 0) {
+		DRV_LOG(ERR, "Failed to unregister intr callback ret %d", ret);
+		return ret;
+	}
+
+	rte_intr_instance_free(priv->intr_handle);
+
+	return 0;
+}
+
+static int
+mana_intr_install(struct mana_priv *priv)
+{
+	int ret, flags;
+	struct ibv_context *ctx = priv->ib_ctx;
+
+	priv->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED);
+	if (!priv->intr_handle) {
+		DRV_LOG(ERR, "Failed to allocate intr_handle");
+		rte_errno = ENOMEM;
+		return -ENOMEM;
+	}
+
+	rte_intr_fd_set(priv->intr_handle, -1);
+
+	flags = fcntl(ctx->async_fd, F_GETFL);
+	ret = fcntl(ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
+	if (ret) {
+		DRV_LOG(ERR, "Failed to change async_fd to NONBLOCK");
+		goto free_intr;
+	}
+
+	rte_intr_fd_set(priv->intr_handle, ctx->async_fd);
+	rte_intr_type_set(priv->intr_handle, RTE_INTR_HANDLE_EXT);
+
+	ret = rte_intr_callback_register(priv->intr_handle,
+					 mana_intr_handler, priv);
+	if (ret) {
+		DRV_LOG(ERR, "Failed to register intr callback");
+		rte_intr_fd_set(priv->intr_handle, -1);
+		goto restore_fd;
+	}
+
+	return 0;
+
+restore_fd:
+	fcntl(ctx->async_fd, F_SETFL, flags);
+
+free_intr:
+	rte_intr_instance_free(priv->intr_handle);
+	priv->intr_handle = NULL;
+
+	return ret;
+}
+
 static int
 mana_proc_priv_init(struct rte_eth_dev *dev)
 {
@@ -667,6 +763,13 @@ mana_pci_probe_mac(struct rte_pci_device *pci_dev,
 				name, priv->max_rx_queues, priv->max_rx_desc,
 				priv->max_send_sge);
 
+			/* Create async interrupt handler */
+			ret = mana_intr_install(priv);
+			if (ret) {
+				DRV_LOG(ERR, "Failed to install intr handler");
+				goto failed;
+			}
+
 			rte_spinlock_lock(&mana_shared_data->lock);
 			mana_shared_data->primary_cnt++;
 			rte_spinlock_unlock(&mana_shared_data->lock);
diff --git a/drivers/net/mana/mana.h b/drivers/net/mana/mana.h
index 0b4a828b0a..d9eb19559d 100644
--- a/drivers/net/mana/mana.h
+++ b/drivers/net/mana/mana.h
@@ -40,6 +40,7 @@ struct mana_priv {
 	struct ibv_pd *ib_pd;
 	struct ibv_pd *ib_parent_pd;
 	void *db_page;
+	struct rte_intr_handle *intr_handle;
 	int max_rx_queues;
 	int max_tx_queues;
 	int max_rx_desc;
-- 
2.17.1


  parent reply	other threads:[~2022-09-24  2:46 UTC|newest]

Thread overview: 108+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-03  1:40 [Patch v7 00/18] Introduce Microsoft Azure Network Adatper (MANA) PMD longli
2022-09-03  1:40 ` [Patch v7 01/18] net/mana: add basic driver, build environment and doc longli
2022-09-06 13:01   ` Ferruh Yigit
2022-09-07  1:43     ` Long Li
2022-09-07  2:41       ` Long Li
2022-09-07  9:12         ` Ferruh Yigit
2022-09-07 22:24           ` Long Li
2022-09-06 15:00   ` Stephen Hemminger
2022-09-07  1:48     ` Long Li
2022-09-07  9:14       ` Ferruh Yigit
2022-09-08 21:56   ` [Patch v8 01/18] net/mana: add basic driver with " longli
2022-09-21 17:55     ` Ferruh Yigit
2022-09-23 18:28       ` Long Li
2022-09-21 17:55     ` Ferruh Yigit
2022-09-23 18:31       ` Long Li
2022-09-24  2:45     ` [Patch v9 00/18] Introduce Microsoft Azure Network Adatper (MANA) PMD longli
2022-09-24  2:45       ` [Patch v9 01/18] net/mana: add basic driver with build environment and doc longli
2022-10-04 17:47         ` Ferruh Yigit
2022-09-24  2:45       ` [Patch v9 02/18] net/mana: device configuration and stop longli
2022-09-24  2:45       ` [Patch v9 03/18] net/mana: report supported ptypes longli
2022-09-24  2:45       ` [Patch v9 04/18] net/mana: support link update longli
2022-09-24  2:45       ` longli [this message]
2022-09-24  2:45       ` [Patch v9 06/18] net/mana: report device info longli
2022-09-24  2:45       ` [Patch v9 07/18] net/mana: configure RSS longli
2022-10-04 17:48         ` Ferruh Yigit
2022-09-24  2:45       ` [Patch v9 08/18] net/mana: configure Rx queues longli
2022-09-24  2:45       ` [Patch v9 09/18] net/mana: configure Tx queues longli
2022-09-24  2:45       ` [Patch v9 10/18] net/mana: implement memory registration longli
2022-09-24  2:45       ` [Patch v9 11/18] net/mana: implement the hardware layer operations longli
2022-10-04 17:48         ` Ferruh Yigit
2022-09-24  2:45       ` [Patch v9 12/18] net/mana: start/stop Tx queues longli
2022-09-24  2:45       ` [Patch v9 13/18] net/mana: start/stop Rx queues longli
2022-09-24  2:45       ` [Patch v9 14/18] net/mana: receive packets longli
2022-10-04 17:50         ` Ferruh Yigit
2022-09-24  2:45       ` [Patch v9 15/18] net/mana: send packets longli
2022-10-04 17:49         ` Ferruh Yigit
2022-09-24  2:45       ` [Patch v9 16/18] net/mana: start/stop device longli
2022-09-24  2:45       ` [Patch v9 17/18] net/mana: report queue stats longli
2022-09-24  2:45       ` [Patch v9 18/18] net/mana: support Rx interrupts longli
2022-10-04 17:51       ` [Patch v9 00/18] Introduce Microsoft Azure Network Adatper (MANA) PMD Ferruh Yigit
2022-10-04 19:37         ` Long Li
2022-10-05 23:21       ` [Patch v10 " longli
2022-10-05 23:21         ` [Patch v10 01/18] net/mana: add basic driver with build environment and doc longli
2023-03-21 20:19           ` Ferruh Yigit
2023-03-21 21:37             ` Long Li
2022-10-05 23:21         ` [Patch v10 02/18] net/mana: device configuration and stop longli
2022-10-05 23:21         ` [Patch v10 03/18] net/mana: report supported ptypes longli
2022-10-05 23:21         ` [Patch v10 04/18] net/mana: support link update longli
2022-10-05 23:21         ` [Patch v10 05/18] net/mana: support device removal interrupts longli
2022-10-05 23:21         ` [Patch v10 06/18] net/mana: report device info longli
2022-10-05 23:21         ` [Patch v10 07/18] net/mana: configure RSS longli
2022-10-05 23:21         ` [Patch v10 08/18] net/mana: configure Rx queues longli
2022-10-05 23:21         ` [Patch v10 09/18] net/mana: configure Tx queues longli
2022-10-05 23:22         ` [Patch v10 10/18] net/mana: implement memory registration longli
2022-10-05 23:22         ` [Patch v10 11/18] net/mana: implement the hardware layer operations longli
2022-10-05 23:22         ` [Patch v10 12/18] net/mana: start/stop Tx queues longli
2022-10-05 23:22         ` [Patch v10 13/18] net/mana: start/stop Rx queues longli
2022-10-05 23:22         ` [Patch v10 14/18] net/mana: receive packets longli
2022-10-05 23:22         ` [Patch v10 15/18] net/mana: send packets longli
2022-10-05 23:22         ` [Patch v10 16/18] net/mana: start/stop device longli
2022-10-05 23:22         ` [Patch v10 17/18] net/mana: report queue stats longli
2022-10-05 23:22         ` [Patch v10 18/18] net/mana: support Rx interrupts longli
2022-10-06  8:54         ` [Patch v10 00/18] Introduce Microsoft Azure Network Adatper (MANA) PMD Ferruh Yigit
2022-10-06 16:54           ` Ferruh Yigit
2022-10-06 18:07             ` Long Li
2022-09-03  1:40 ` [Patch v7 02/18] net/mana: add device configuration and stop longli
2022-09-08 21:57   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 03/18] net/mana: add function to report support ptypes longli
2022-09-08 21:57   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 04/18] net/mana: add link update longli
2022-09-08 21:57   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 05/18] net/mana: add function for device removal interrupts longli
2022-09-08 21:58   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 06/18] net/mana: add device info longli
2022-09-08 21:58   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 07/18] net/mana: add function to configure RSS longli
2022-09-08 21:58   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 08/18] net/mana: add function to configure RX queues longli
2022-09-08 21:58   ` [Patch v8 08/18] net/mana: add function to configure Rx queues longli
2022-09-03  1:40 ` [Patch v7 09/18] net/mana: add function to configure TX queues longli
2022-09-08 21:58   ` [Patch v8 09/18] net/mana: add function to configure Tx queues longli
2022-09-03  1:40 ` [Patch v7 10/18] net/mana: implement memory registration longli
2022-09-08 21:58   ` [Patch v8 " longli
2022-09-21 17:55     ` Ferruh Yigit
2022-09-03  1:40 ` [Patch v7 11/18] net/mana: implement the hardware layer operations longli
2022-09-08 21:59   ` [Patch v8 " longli
2022-09-21 17:55   ` [Patch v7 " Ferruh Yigit
2022-09-23 18:26     ` Long Li
2022-09-03  1:40 ` [Patch v7 12/18] net/mana: add function to start/stop TX queues longli
2022-09-08 21:59   ` [Patch v8 12/18] net/mana: add function to start/stop Tx queues longli
2022-09-03  1:40 ` [Patch v7 13/18] net/mana: add function to start/stop RX queues longli
2022-09-08 21:59   ` [Patch v8 13/18] net/mana: add function to start/stop Rx queues longli
2022-09-03  1:40 ` [Patch v7 14/18] net/mana: add function to receive packets longli
2022-09-08 21:59   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 15/18] net/mana: add function to send packets longli
2022-09-08 21:59   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 16/18] net/mana: add function to start/stop device longli
2022-09-08 21:59   ` [Patch v8 " longli
2022-09-03  1:40 ` [Patch v7 17/18] net/mana: add function to report queue stats longli
2022-09-08 22:00   ` [Patch v8 " longli
2022-09-03  1:41 ` [Patch v7 18/18] net/mana: add function to support RX interrupts longli
2022-09-08 22:00   ` [Patch v8 18/18] net/mana: add function to support Rx interrupts longli
2022-09-21 17:55   ` [Patch v7 18/18] net/mana: add function to support RX interrupts Ferruh Yigit
2022-09-23 18:26     ` Long Li
2022-09-06 13:03 ` [Patch v7 00/18] Introduce Microsoft Azure Network Adatper (MANA) PMD Ferruh Yigit
2022-09-06 14:38   ` Ferruh Yigit
2022-09-07  1:41     ` Long Li
2022-09-07  1:40   ` Long Li

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