pci: add option to force uio binding

Type: improvement

Change-Id: Ifea4badd58f7e2b5e792d7506f6747851a08587f
Signed-off-by: Benoît Ganne <bganne@cisco.com>

5 files changed, 23 insertions, 8 deletions

diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
index 02cf6812d43..7569fc60a90 100644
--- a/src/plugins/dpdk/device/dpdk.h
+++ b/src/plugins/dpdk/device/dpdk.h
@@ -265,6 +265,7 @@ typedef struct
   u8 **eal_init_args;
   u8 *eal_init_args_str;
   u8 *uio_driver_name;
+  u8 uio_bind_force;
   u8 enable_telemetry;
   u16 max_simd_bitwidth;
 
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index 3f27a07f0ba..83ce2dc9cbc 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -681,7 +681,8 @@ dpdk_bind_devices_to_uio (dpdk_config_main_t * conf)
         continue;
       }
 
-    error = vlib_pci_bind_to_uio (vm, addr, (char *) conf->uio_driver_name);
+    error = vlib_pci_bind_to_uio (vm, addr, (char *) conf->uio_driver_name,
+				  conf->uio_bind_force);
 
     if (error)
       {
@@ -1089,6 +1090,8 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
 	}
       else if (unformat (input, "uio-driver %s", &conf->uio_driver_name))
 	;
+      else if (unformat (input, "uio-bind-force"))
+	conf->uio_bind_force = 1;
       else if (unformat (input, "socket-mem %s", &socket_mem))
 	;
       else if (unformat (input, "no-pci"))
diff --git a/src/plugins/vmxnet3/cli.c b/src/plugins/vmxnet3/cli.c
index 039e9f3a75b..f751358262b 100644
--- a/src/plugins/vmxnet3/cli.c
+++ b/src/plugins/vmxnet3/cli.c
@@ -47,8 +47,10 @@ vmxnet3_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
 	args.enable_gso = 1;
       else if (unformat (line_input, "elog"))
 	args.enable_elog = 1;
+      else if (unformat (line_input, "bind force"))
+	args.bind = VMXNET3_BIND_FORCE;
       else if (unformat (line_input, "bind"))
-	args.bind = 1;
+	args.bind = VMXNET3_BIND_DEFAULT;
       else if (unformat (line_input, "rx-queue-size %u", &size))
 	args.rxq_size = size;
       else if (unformat (line_input, "tx-queue-size %u", &size))
@@ -77,10 +79,11 @@ vmxnet3_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
 /* *INDENT-OFF* */
 VLIB_CLI_COMMAND (vmxnet3_create_command, static) = {
   .path = "create interface vmxnet3",
-  .short_help = "create interface vmxnet3 <pci-address>"
-                " [rx-queue-size <size>] [tx-queue-size <size>]"
-                " [num-tx-queues <number>] [num-rx-queues <number>] [bind]"
-                " [gso]",
+  .short_help =
+    "create interface vmxnet3 <pci-address>"
+    " [rx-queue-size <size>] [tx-queue-size <size>]"
+    " [num-tx-queues <number>] [num-rx-queues <number>] [bind [force]]"
+    " [gso]",
   .function = vmxnet3_create_command_fn,
 };
 /* *INDENT-ON* */
diff --git a/src/plugins/vmxnet3/vmxnet3.c b/src/plugins/vmxnet3/vmxnet3.c
index 770cb2d418d..be862d7127a 100644
--- a/src/plugins/vmxnet3/vmxnet3.c
+++ b/src/plugins/vmxnet3/vmxnet3.c
@@ -692,7 +692,8 @@ vmxnet3_create_if (vlib_main_t * vm, vmxnet3_create_if_args_t * args)
 
   if (args->bind)
     {
-      error = vlib_pci_bind_to_uio (vm, &args->addr, (char *) "auto");
+      error = vlib_pci_bind_to_uio (vm, &args->addr, (char *) "auto",
+				    VMXNET3_BIND_FORCE == args->bind);
       if (error)
 	{
 	  args->rv = VNET_API_ERROR_INVALID_INTERFACE;
diff --git a/src/plugins/vmxnet3/vmxnet3.h b/src/plugins/vmxnet3/vmxnet3.h
index 81aeec6f5c5..89602f8ee9e 100644
--- a/src/plugins/vmxnet3/vmxnet3.h
+++ b/src/plugins/vmxnet3/vmxnet3.h
@@ -606,6 +606,13 @@ typedef struct
 
 extern vmxnet3_main_t vmxnet3_main;
 
+typedef enum
+{
+  VMXNET3_BIND_NONE = 0,
+  VMXNET3_BIND_DEFAULT = 1,
+  VMXNET3_BIND_FORCE = 2,
+} __clib_packed vmxnet3_bind_t;
+
 typedef struct
 {
   vlib_pci_addr_t addr;
@@ -614,7 +621,7 @@ typedef struct
   u16 rxq_num;
   u16 txq_size;
   u16 txq_num;
-  u8 bind;
+  vmxnet3_bind_t bind;
   u8 enable_gso;
   /* return */
   i32 rv;