[PATCH 1/5] bus/vmbus: add devargs support

[Stephen Hemminger <stephen@networkplumber.org>]

From: Stephen Hemminger <sthemmin@microsoft.com>

Take device arguments from command line and put
them in the device devargs.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
 drivers/bus/vmbus/linux/vmbus_bus.c |  2 ++
 drivers/bus/vmbus/private.h         |  3 +++
 drivers/bus/vmbus/vmbus_common.c    | 22 +++++++++++++++++++++-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/vmbus/linux/vmbus_bus.c b/drivers/bus/vmbus/linux/vmbus_bus.c
index 52d6a3c05306..527a6a39f2bc 100644
--- a/drivers/bus/vmbus/linux/vmbus_bus.c
+++ b/drivers/bus/vmbus/linux/vmbus_bus.c
@@ -276,6 +276,8 @@ vmbus_scan_one(const char *name)
 		dev->device.numa_node = SOCKET_ID_ANY;
 	}
 
+	dev->device.devargs = vmbus_devargs_lookup(dev);
+
 	/* device is valid, add in list (sorted) */
 	VMBUS_LOG(DEBUG, "Adding vmbus device %s", name);
 
diff --git a/drivers/bus/vmbus/private.h b/drivers/bus/vmbus/private.h
index 9964fc42a7b5..f2022a68cb2b 100644
--- a/drivers/bus/vmbus/private.h
+++ b/drivers/bus/vmbus/private.h
@@ -66,6 +66,9 @@ struct vmbus_channel {
 
 #define VMBUS_MAX_CHANNELS	64
 
+struct rte_devargs *
+vmbus_devargs_lookup(struct rte_vmbus_device *dev);
+
 int vmbus_chan_create(const struct rte_vmbus_device *device,
 		      uint16_t relid, uint16_t subid, uint8_t monitor_id,
 		      struct vmbus_channel **new_chan);
diff --git a/drivers/bus/vmbus/vmbus_common.c b/drivers/bus/vmbus/vmbus_common.c
index c7165ad54fe2..979fabdcbb61 100644
--- a/drivers/bus/vmbus/vmbus_common.c
+++ b/drivers/bus/vmbus/vmbus_common.c
@@ -85,7 +85,6 @@ vmbus_match(const struct rte_vmbus_driver *dr,
 
 	return false;
 }
-
 /*
  * If device ID match, call the devinit() function of the driver.
  */
@@ -204,6 +203,27 @@ vmbus_parse(const char *name, void *addr)
 	return ret;
 }
 
+/*
+ * scan for matching device args on command line
+ * example:
+ *	-w 'vmbus(635a7ae3-091e-4410-ad59-667c4f8c04c3,latency=20)'
+ */
+struct rte_devargs *
+vmbus_devargs_lookup(struct rte_vmbus_device *dev)
+{
+	struct rte_devargs *devargs;
+	rte_uuid_t addr;
+
+	RTE_EAL_DEVARGS_FOREACH("vmbus", devargs) {
+		vmbus_parse(devargs->name, &addr);
+
+		if (rte_uuid_compare(dev->device_id, addr) == 0)
+			return devargs;
+	}
+	return NULL;
+
+}
+
 /* register vmbus driver */
 void
 rte_vmbus_register(struct rte_vmbus_driver *driver)
-- 
2.18.0