[dpdk-dev] [RFC 6/9] devargs: support new global device syntax

[Xueming Li]

When parsing a device syntax, try to parse new global syntax firstly,
then try to parse as legacy syntax if failed.

Example of new global syntax:
 -a bus=pci,addr=82:00.0/class=eth/driver=mlx5,dv_flow_en=1

Signed-off-by: Xueming Li <xuemingl at nvidia.com>
---
 lib/librte_eal/common/eal_common_devargs.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index e1a3cd7367..a79eea12d3 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -57,6 +57,7 @@ rte_devargs_layers_parse(struct rte_devargs *devargs,
 	struct rte_class *cls = NULL;
 	struct rte_bus *bus = NULL;
 	const char *s = devstr;
+	const char *id;
 	size_t nblayer;
 	size_t i = 0;
 	int ret = 0;
@@ -116,6 +117,8 @@ rte_devargs_layers_parse(struct rte_devargs *devargs,
 		if (layers[i].kvlist == NULL)
 			continue;
 		kv = &layers[i].kvlist->pairs[0];
+		if (!kv->key)
+			continue;
 		if (strcmp(kv->key, "bus") == 0) {
 			bus = rte_bus_find_by_name(kv->value);
 			if (bus == NULL) {
@@ -124,6 +127,14 @@ rte_devargs_layers_parse(struct rte_devargs *devargs,
 				ret = -EFAULT;
 				goto get_out;
 			}
+			id = rte_kvargs_get(layers[i].kvlist, "id");
+			if (!id) {
+				RTE_LOG(ERR, EAL, "Could not find bus id \"%s\"\n",
+					devstr);
+				ret = -EFAULT;
+				goto get_out;
+			}
+			strncpy(devargs->name, id, sizeof(devargs->name) - 1);
 		} else if (strcmp(kv->key, "class") == 0) {
 			cls = rte_class_find_by_name(kv->value);
 			if (cls == NULL) {
@@ -190,6 +201,12 @@ rte_devargs_parse(struct rte_devargs *da, const char *dev)
 	if (da == NULL)
 		return -EINVAL;
 
+	/* First parse according new global syntax */
+	if (rte_devargs_layers_parse(da, dev) == 0 && da->bus && da->cls)
+		return 0;
+
+	/* Legacy syntax check: */
+
 	/* Retrieve eventual bus info */
 	do {
 		devname = dev;
-- 
2.25.1