[dpdk-dev] [PATCH v2 9/9] eal: allow PCI device with different representors

[Xueming Li]

When probing same PCI device with different representor arguments, PCI
bus on probed first devargs, ignored other allowed devices with
different representor arguments.

This patch iterates all devargs and try them all after PCI bus scan.

Signed-off-by: Xueming Li <xuemingl at nvidia.com>
---
 lib/librte_eal/common/eal_common_bus.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index baa5b532af..47c0243647 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -10,6 +10,7 @@
 #include <rte_debug.h>
 #include <rte_string_fns.h>
 #include <rte_errno.h>
+#include <rte_devargs.h>
 
 #include "eal_private.h"
 
@@ -56,12 +57,22 @@ rte_bus_scan(void)
 	return 0;
 }
 
+static int
+cmp_dev_name(const struct rte_device *dev, const void *_name)
+{
+	const char *name = _name;
+
+	return strcmp(dev->name, name);
+}
+
 /* Probe all devices of all buses */
 int
 rte_bus_probe(void)
 {
 	int ret;
 	struct rte_bus *bus, *vbus = NULL;
+	struct rte_devargs *da;
+	struct rte_device *dev;
 
 	TAILQ_FOREACH(bus, &rte_bus_list, next) {
 		if (!strcmp(bus->name, "vdev")) {
@@ -82,6 +93,20 @@ rte_bus_probe(void)
 				vbus->name);
 	}
 
+	/* For devargs with same name but different arguments, try them all. */
+	RTE_EAL_DEVARGS_FOREACH("pci", da) {
+		dev = da->bus->find_device(NULL, cmp_dev_name, da->name);
+		if (!dev || !rte_dev_is_probed(dev) || dev->devargs == da)
+			continue;
+		dev->devargs = da;
+		ret = dev->bus->plug(dev);
+		if (ret > 0)
+			ret = -ENOTSUP;
+		if (!ret && rte_dev_is_probed(dev))
+			RTE_LOG(ERR, EAL, "device probed %s %s", da->name,
+				da->args);
+	}
+
 	return 0;
 }
 
-- 
2.25.1