[dpdk-dev] [PATCH v7 2/2] librte_pmd_null: Support port hotplug function

[Tetsuya Mukawa]

This patch adds port hotplug support to Null PMD.

v7:
 - Add parameter checkings.
   (Thanks to Iremonger, Bernard)
v6:
 - Fix a parameter of rte_eth_dev_free().
v4:
 - Fix commit title.

Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
---
 lib/librte_pmd_null/rte_eth_null.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/lib/librte_pmd_null/rte_eth_null.c 
b/lib/librte_pmd_null/rte_eth_null.c
index 779db63..1bc4ef3 100644
--- a/lib/librte_pmd_null/rte_eth_null.c
+++ b/lib/librte_pmd_null/rte_eth_null.c
@@ -336,6 +336,13 @@ eth_stats_reset(struct rte_eth_dev *dev)
        }
 }

+static struct eth_driver rte_null_pmd = {
+       .pci_drv = {
+               .name = "rte_null_pmd",
+               .drv_flags = RTE_PCI_DRV_DETACHABLE,
+       },
+};
+
 static void
 eth_queue_release(void *q)
 {
@@ -429,10 +436,12 @@ eth_dev_null_create(const char *name,
        data->nb_tx_queues = (uint16_t)nb_tx_queues;
        data->dev_link = pmd_link;
        data->mac_addrs = &eth_addr;
+       strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));

        eth_dev->data = data;
        eth_dev->dev_ops = &ops;
        eth_dev->pci_dev = pci_dev;
+       eth_dev->driver = &rte_null_pmd;

        /* finally assign rx and tx ops */
        if (packet_copy) {
@@ -532,10 +541,36 @@ rte_pmd_null_devinit(const char *name, const char *params)
        return eth_dev_null_create(name, numa_node, packet_size, packet_copy);
 }

+static int
+rte_pmd_null_devuninit(const char *name, const char *params __rte_unused)
+{
+       struct rte_eth_dev *eth_dev = NULL;
+
+       if (name == NULL)
+               return -EINVAL;
+
+       RTE_LOG(INFO, PMD, "Closing null ethdev on numa socket %u\n",
+                       rte_socket_id());
+
+       /* reserve an ethdev entry */
+       eth_dev = rte_eth_dev_allocated(name);
+       if (eth_dev == NULL)
+               return -1;
+
+       rte_free(eth_dev->data->dev_private);
+       rte_free(eth_dev->data);
+       rte_free(eth_dev->pci_dev);
+
+       rte_eth_dev_free(eth_dev);
+
+       return 0;
+}
+
 static struct rte_driver pmd_null_drv = {
        .name = "eth_null",
        .type = PMD_VDEV,
        .init = rte_pmd_null_devinit,
+       .uninit = rte_pmd_null_devuninit,
 };

 PMD_REGISTER_DRIVER(pmd_null_drv);
-- 
1.9.1