[dpdk-dev] [PATCH v1 21/28] eal/soc: unbind kernel driver on probe

[Jan Viktorin]

Signed-off-by: Jan Viktorin <viktorin at rehivetech.com>
---
 lib/librte_eal/common/eal_common_soc.c |  6 ++++++
 lib/librte_eal/common/eal_private.h    | 10 ++++++++++
 lib/librte_eal/linuxapp/eal/eal_soc.c  | 11 +++++++++++
 3 files changed, 27 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_soc.c b/lib/librte_eal/common/eal_common_soc.c
index d178c48..49dbcb8 100644
--- a/lib/librte_eal/common/eal_common_soc.c
+++ b/lib/librte_eal/common/eal_common_soc.c
@@ -38,6 +38,7 @@
 #include <rte_log.h>
 #include <rte_common.h>
 #include <rte_devargs.h>
+#include <rte_eal.h>
 #include <rte_soc.h>
 
 #include "eal_private.h"
@@ -124,6 +125,11 @@ rte_eal_soc_probe_one_driver(struct rte_soc_driver *dr,
 		ret = rte_eal_soc_map_device(dev);
 		if (ret)
 			return ret;
+	} else if (dr->drv_flags & RTE_SOC_DRV_FORCE_UNBIND
+		&& rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		/* unbind */
+		if (soc_unbind_kernel_driver(dev) < 0)
+			return -1;
 	}
 
 	dev->driver = dr;
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index fc1d9c6..f1409cf 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -210,6 +210,16 @@ int rte_eal_soc_init(void);
  */
 int soc_update_device(const struct rte_soc_addr *addr);
 
+/**
+ * Unbind kernel driver for this device
+ *
+ * This function is private to EAL.
+ *
+ * @return
+ *   0 on success, negative on error
+ */
+int soc_unbind_kernel_driver(struct rte_soc_device *dev);
+
 struct rte_pci_driver;
 struct rte_pci_device;
 
diff --git a/lib/librte_eal/linuxapp/eal/eal_soc.c b/lib/librte_eal/linuxapp/eal/eal_soc.c
index 6ef7d2f..6e9e242 100644
--- a/lib/librte_eal/linuxapp/eal/eal_soc.c
+++ b/lib/librte_eal/linuxapp/eal/eal_soc.c
@@ -49,6 +49,17 @@
 #include "eal_private.h"
 
 int
+soc_unbind_kernel_driver(struct rte_soc_device *dev)
+{
+	char devpath[PATH_MAX];
+
+	snprintf(devpath, sizeof(devpath), "%s/%s",
+	         soc_get_sysfs_path(), dev->addr.name);
+
+	return rte_eal_unbind_kernel_driver(devpath, dev->addr.name);
+}
+
+int
 rte_eal_soc_map_device(struct rte_soc_device *dev)
 {
 	int ret = -1;
-- 
2.8.0