[dpdk-dev] [PATCH v2 1/5] eal: bring forward multi-process channel init

[Jianfeng Tan]

Adjust the init sequence: put mp channel init before bus scan
so that we can init the vdev bus through mp channel in the
secondary process before the bus scan.

Signed-off-by: Jianfeng Tan <jianfeng.tan at intel.com>
---
 lib/librte_eal/bsdapp/eal/eal.c   | 23 +++++++++++++----------
 lib/librte_eal/linuxapp/eal/eal.c | 23 +++++++++++++----------
 2 files changed, 26 insertions(+), 20 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index 4eafcb5..b469382 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -544,6 +544,19 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	rte_config_init();
+
+	/* Put mp channel init before bus scan so that we can init the vdev
+	 * bus through mp channel in the secondary process before the bus scan.
+	 */
+	if (rte_mp_channel_init() < 0) {
+		rte_eal_init_alert("failed to init mp channel\n");
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			rte_errno = EFAULT;
+			return -1;
+		}
+	}
+
 	if (rte_bus_scan()) {
 		rte_eal_init_alert("Cannot scan the buses for devices\n");
 		rte_errno = ENODEV;
@@ -583,16 +596,6 @@ rte_eal_init(int argc, char **argv)
 
 	rte_srand(rte_rdtsc());
 
-	rte_config_init();
-
-	if (rte_mp_channel_init() < 0) {
-		rte_eal_init_alert("failed to init mp channel\n");
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-			rte_errno = EFAULT;
-			return -1;
-		}
-	}
-
 	if (rte_eal_memory_init() < 0) {
 		rte_eal_init_alert("Cannot init memory\n");
 		rte_errno = ENOMEM;
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index da005dd..d0edf77 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -765,6 +765,19 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	rte_config_init();
+
+	/* Put mp channel init before bus scan so that we can init the vdev
+	 * bus through mp channel in the secondary process before the bus scan.
+	 */
+	if (rte_mp_channel_init() < 0) {
+		rte_eal_init_alert("failed to init mp channel\n");
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			rte_errno = EFAULT;
+			return -1;
+		}
+	}
+
 	if (rte_bus_scan()) {
 		rte_eal_init_alert("Cannot scan the buses for devices\n");
 		rte_errno = ENODEV;
@@ -811,8 +824,6 @@ rte_eal_init(int argc, char **argv)
 
 	rte_srand(rte_rdtsc());
 
-	rte_config_init();
-
 	if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
 		rte_eal_init_alert("Cannot init logging.");
 		rte_errno = ENOMEM;
@@ -820,14 +831,6 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
-	if (rte_mp_channel_init() < 0) {
-		rte_eal_init_alert("failed to init mp channel\n");
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-			rte_errno = EFAULT;
-			return -1;
-		}
-	}
-
 #ifdef VFIO_PRESENT
 	if (rte_eal_vfio_setup() < 0) {
 		rte_eal_init_alert("Cannot init VFIO\n");
-- 
2.7.4