[dpdk-dev] [RFC PATCH] librte_pmd_bond: add support for PCI Port Hotplug

[Bernard Iremonger <bernard.iremonger@intel.com>]

This patch depends on the Port Hotplug Framework.
It implements the rte_dev_uninit_t() function for the link bonding pmd.

Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
---
 lib/librte_pmd_bond/rte_eth_bond.h         |   13 ++++-
 lib/librte_pmd_bond/rte_eth_bond_api.c     |   84 ++++++++++++++++++++--------
 lib/librte_pmd_bond/rte_eth_bond_pmd.c     |   23 +++++++-
 lib/librte_pmd_bond/rte_eth_bond_private.h |    5 +-
 4 files changed, 97 insertions(+), 28 deletions(-)

diff --git a/lib/librte_pmd_bond/rte_eth_bond.h b/lib/librte_pmd_bond/rte_eth_bond.h
index d688fc3..8efbf07 100644
--- a/lib/librte_pmd_bond/rte_eth_bond.h
+++ b/lib/librte_pmd_bond/rte_eth_bond.h
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -131,6 +131,17 @@ int
 rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id);
 
 /**
+ * Free a bonded rte_eth_dev device
+ *
+ * @param name			Name of the link bonding device.
+ *
+ * @return
+ *	0 on success, negative value otherwise
+ */
+int
+rte_eth_bond_free(const char *name);
+
+/**
  * Add a rte_eth_dev device as a slave to the bonded device
  *
  * @param bonded_port_id	Port ID of bonded device.
diff --git a/lib/librte_pmd_bond/rte_eth_bond_api.c b/lib/librte_pmd_bond/rte_eth_bond_api.c
index e91a623..b91ef24 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_api.c
+++ b/lib/librte_pmd_bond/rte_eth_bond_api.c
@@ -44,6 +44,13 @@
 
 #define DEFAULT_POLLING_INTERVAL_10_MS (10)
 
+static struct eth_driver rte_bond_pmd = {
+	.pci_drv = {
+		.name = "rte_bond_pmd",
+		.drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_DETACHABLE,
+	},
+};
+
 int
 valid_bonded_ethdev(struct rte_eth_dev *eth_dev)
 {
@@ -193,6 +200,7 @@ number_of_sockets(void)
 }
 
 const char *driver_name = "Link Bonding PMD";
+static struct rte_pci_id pci_id_table = {0};
 
 int
 rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
@@ -200,9 +208,8 @@ rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
 	struct rte_pci_device *pci_dev = NULL;
 	struct bond_dev_private *internals = NULL;
 	struct rte_eth_dev *eth_dev = NULL;
-	struct eth_driver *eth_drv = NULL;
 	struct rte_pci_driver *pci_drv = NULL;
-	struct rte_pci_id *pci_id_table = NULL;
+
 	/* now do all data allocation - for eth_dev structure, dummy pci driver
 	 * and internal (private) data
 	 */
@@ -224,26 +231,14 @@ rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
 		goto err;
 	}
 
-	eth_drv = rte_zmalloc_socket(name, sizeof(*eth_drv), 0, socket_id);
-	if (eth_drv == NULL) {
-		RTE_BOND_LOG(ERR, "Unable to malloc eth_drv on socket");
-		goto err;
-	}
+	pci_drv = &rte_bond_pmd.pci_drv;
 
-	pci_drv = &eth_drv->pci_drv;
+	pci_id_table.device_id = PCI_ANY_ID;
+	pci_id_table.subsystem_device_id = PCI_ANY_ID;
+	pci_id_table.vendor_id = PCI_ANY_ID;
+	pci_id_table.subsystem_vendor_id = PCI_ANY_ID;
 
-	pci_id_table = rte_zmalloc_socket(name, sizeof(*pci_id_table), 0, socket_id);
-	if (pci_id_table == NULL) {
-		RTE_BOND_LOG(ERR, "Unable to malloc pci_id_table on socket");
-		goto err;
-	}
-	pci_id_table->device_id = PCI_ANY_ID;
-	pci_id_table->subsystem_device_id = PCI_ANY_ID;
-	pci_id_table->vendor_id = PCI_ANY_ID;
-	pci_id_table->subsystem_vendor_id = PCI_ANY_ID;
-
-	pci_drv->id_table = pci_id_table;
-	pci_drv->drv_flags = RTE_PCI_DRV_INTR_LSC;
+	pci_drv->id_table = &pci_id_table;
 
 	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, socket_id);
 	if (internals == NULL) {
@@ -260,8 +255,7 @@ rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
 
 	pci_dev->numa_node = socket_id;
 	pci_drv->name = driver_name;
-
-	eth_dev->driver = eth_drv;
+	eth_dev->driver = &rte_bond_pmd;
 	eth_dev->data->dev_private = internals;
 	eth_dev->data->nb_rx_queues = (uint16_t)1;
 	eth_dev->data->nb_tx_queues = (uint16_t)1;
@@ -317,13 +311,55 @@ rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
 
 err:
 	rte_free(pci_dev);
-	rte_free(pci_id_table);
-	rte_free(eth_drv);
 	rte_free(internals);
+	rte_free(eth_dev->data->mac_addrs);
 
 	return -1;
 }
 
+int
+rte_eth_bond_free(const char *name)
+{
+	struct rte_eth_dev *eth_dev = NULL;
+	struct bond_dev_private *internals = NULL;
+
+	/* now free all data allocation - for eth_dev structure,
+	 * dummy pci driver and internal (private) data
+	 */
+
+	/* find an ethdev entry */
+	eth_dev = rte_eth_dev_allocated(name);
+	if (eth_dev == NULL)
+		return -ENODEV;
+
+	if (eth_dev->data->dev_started == 1)
+		bond_ethdev_stop(eth_dev);
+
+	eth_dev->dev_ops = NULL;
+	eth_dev->rx_pkt_burst = NULL;
+	eth_dev->tx_pkt_burst = NULL;
+
+	internals = eth_dev->data->dev_private;
+	rte_spinlock_lock(&internals->lock);
+
+	if (internals->mode == BONDING_MODE_8023AD) {
+		bond_mode_8023ad_stop(eth_dev);
+		bond_mode_8023ad_deactivate_slave(eth_dev, internals->port_id);
+	} else if (internals->mode == BONDING_MODE_TLB
+			|| internals->mode == BONDING_MODE_ALB)
+		bond_tlb_disable(internals);
+
+	rte_spinlock_unlock(&internals->lock);
+
+	rte_free(eth_dev->pci_dev);
+	rte_free(eth_dev->data->dev_private);
+	rte_free(eth_dev->data->mac_addrs);
+
+	rte_eth_dev_release_port(eth_dev);
+
+	return 0;
+}
+
 static int
 __eth_bond_slave_add_lock_free(uint8_t bonded_port_id, uint8_t slave_port_id)
 {
diff --git a/lib/librte_pmd_bond/rte_eth_bond_pmd.c b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
index c937e6b..45d5b89 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_pmd.c
+++ b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -1503,7 +1503,7 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
 	return 0;
 }
 
-static void
+void
 bond_ethdev_stop(struct rte_eth_dev *eth_dev)
 {
 	struct bond_dev_private *internals = eth_dev->data->dev_private;
@@ -2038,6 +2038,24 @@ parse_error:
 	return -1;
 }
 
+static int
+bond_uninit(const char *name)
+{
+	int  ret;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	RTE_LOG(INFO, EAL, "Uninitializing pmd_bond for %s\n", name);
+
+	/* free link bonding eth device */
+	ret = rte_eth_bond_free(name);
+	if (ret < 0)
+		RTE_LOG(ERR, EAL, "Failed to free %s\n", name);
+
+	return ret;
+}
+
 /* this part will resolve the slave portids after all the other pdev and vdev
  * have been allocated */
 static int
@@ -2264,6 +2282,7 @@ static struct rte_driver bond_drv = {
 	.name = "eth_bond",
 	.type = PMD_VDEV,
 	.init = bond_init,
+	.uninit = bond_uninit,
 };
 
 PMD_REGISTER_DRIVER(bond_drv);
diff --git a/lib/librte_pmd_bond/rte_eth_bond_private.h b/lib/librte_pmd_bond/rte_eth_bond_private.h
index 45e5c65..8551ddd 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_private.h
+++ b/lib/librte_pmd_bond/rte_eth_bond_private.h
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -284,4 +284,7 @@ bond_tlb_enable(struct bond_dev_private *internals);
 void
 bond_tlb_activate_slave(struct bond_dev_private *internals);
 
+void
+bond_ethdev_stop(struct rte_eth_dev *eth_dev);
+
 #endif
-- 
1.7.4.1