[spp] [PATCH 1/6] shared: addition of attach()

[x-fn-spp@sl.ntt-tx.co.jp]

From: Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp>

>From DPDK 18.08, rte_eth_dev_attach becomes deprecated and will be
deleted in 18.11. There exists several places in spp where uses the
API and those should be replaced with rte_eth_hotplug_add.
As the first step, this patch creates new function named
spp_rte_eth_dev_attach under shared directory so that primary,nfv,vm,
vf can refer this new function.

Signed-off-by: Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp>
Signed-off-by: Naoki Takada <takada.naoki@lab.ntt.co.jp>
---
 src/shared/common.c | 26 ++++++++++++++++++++++++++
 src/shared/common.h | 17 +++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/src/shared/common.c b/src/shared/common.c
index f1754db..aba2309 100644
--- a/src/shared/common.c
+++ b/src/shared/common.c
@@ -500,3 +500,29 @@ append_patch_info_json(char *str,
 
 	return 0;
 }
+
+/* attach the new device, then return port_id of the device */
+int
+attach(const char *devargs, uint16_t *port_id)
+{
+	int ret = -1;
+	struct rte_devargs da;
+
+	memset(&da, 0, sizeof(da));
+
+	/* parse devargs */
+	if (rte_devargs_parse(&da, devargs))
+		return -1;
+
+	ret = rte_eal_hotplug_add(da.bus->name, da.name, da.args);
+	if (ret < 0) {
+		free(da.args);
+		return ret;
+	}
+
+	ret = rte_eth_dev_get_port_by_name(da.name, port_id);
+
+	free(da.args);
+
+	return ret;
+}
diff --git a/src/shared/common.h b/src/shared/common.h
index a5395aa..a97943a 100644
--- a/src/shared/common.h
+++ b/src/shared/common.h
@@ -18,7 +18,9 @@
 #include <rte_common.h>
 #include <rte_config.h>
 #include <rte_eal.h>
+#include <rte_devargs.h>
 #include <rte_ethdev.h>
+#include <rte_ethdev_driver.h>
 #include <rte_launch.h>
 #include <rte_lcore.h>
 #include <rte_log.h>
@@ -217,4 +219,19 @@ int spp_atoi(const char *str, int *val);
 
 #define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
 
+/**
+ * Attach a new Ethernet device specified by arguments.
+ *
+ * @param devargs
+ *  A pointer to a strings array describing the new device
+ *  to be attached. The strings should be a pci address like
+ *  '0000:01:00.0' or virtual device name like 'net_pcap0'.
+ * @param port_id
+ *  A pointer to a port identifier actually attached.
+ * @return
+ *  0 on success and port_id is filled, negative on error
+ */
+int
+attach(const char *devargs, uint16_t *port_id);
+
 #endif
-- 
2.18.0