[dpdk-dev] [FDIO] dpdk: add devargs support

[chenmin.sun@intel.com]

From: Chenmin Sun <chenmin.sun@intel.com>

Type: feature

This patch adds the devargs support for dpdk device
The devargs are used as hardware-specific init args for dpdk devices
please refer to the nic guides under
$(DPDK_DIR)/doc/guides/nics/$(NIC_DRIVER).rst

Signed-off-by: Chenmin Sun <chenmin.sun@intel.com>
Change-Id: Id380d04720090bb66afe5ce09d664e5e248b8eb9
---
 src/plugins/dpdk/device/dpdk.h   |  2 ++
 src/plugins/dpdk/device/format.c |  3 +++
 src/plugins/dpdk/device/init.c   | 36 +++++++++++++++++++++-----------
 src/vpp/conf/startup.conf        |  5 +++++
 4 files changed, 34 insertions(+), 12 deletions(-)

diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
index d58d2daa7..ab28ac06a 100644
--- a/src/plugins/dpdk/device/dpdk.h
+++ b/src/plugins/dpdk/device/dpdk.h
@@ -336,6 +336,8 @@ typedef struct
   u32 hqos_enabled;
   dpdk_device_config_hqos_t hqos;
   u8 tso;
+  u8 *devargs;
+
 #define DPDK_DEVICE_TSO_DEFAULT 0
 #define DPDK_DEVICE_TSO_OFF 1
 #define DPDK_DEVICE_TSO_ON  2
diff --git a/src/plugins/dpdk/device/format.c b/src/plugins/dpdk/device/format.c
index 292c083fc..20493eb77 100644
--- a/src/plugins/dpdk/device/format.c
+++ b/src/plugins/dpdk/device/format.c
@@ -564,6 +564,9 @@ format_dpdk_device (u8 * s, va_list * args)
 	      format_white_space, indent + 2, format_dpdk_link_status, xd);
   s = format (s, "%Uflags: %U\n",
 	      format_white_space, indent + 2, format_dpdk_device_flags, xd);
+  if (di.device->devargs && di.device->devargs->args)
+    s = format (s, "%UDevargs: %s\n",
+		format_white_space, indent + 2, di.device->devargs->args);
   s = format (s, "%Urx: queues %d (max %d), desc %d "
 	      "(min %d max %d align %d)\n",
 	      format_white_space, indent + 2, xd->rx_q_used, di.max_rx_queues,
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index 5a6262c30..d0125e939 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -1118,6 +1118,8 @@ dpdk_device_config (dpdk_config_main_t * conf, vlib_pci_addr_t pci_addr,
 	{
 	  devconf->tso = DPDK_DEVICE_TSO_OFF;
 	}
+      else if (unformat (input, "devargs %s", &devconf->devargs))
+	;
       else
 	{
 	  error = clib_error_return (0, "unknown input `%U'",
@@ -1428,21 +1430,31 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
 	/* copy tso config from default device */
 	_(tso)
 
+	/* copy tso config from default device */
+	_(devargs)
+
     /* add DPDK EAL whitelist/blacklist entry */
     if (num_whitelisted > 0 && devconf->is_blacklisted == 0)
-      {
-	tmp = format (0, "-w%c", 0);
-	vec_add1 (conf->eal_init_args, tmp);
-	tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
-	vec_add1 (conf->eal_init_args, tmp);
-      }
+    {
+	  tmp = format (0, "-w%c", 0);
+	  vec_add1 (conf->eal_init_args, tmp);
+	  if (devconf->devargs)
+	  {
+	    tmp = format (0, "%U,%s", format_vlib_pci_addr, &devconf->pci_addr, devconf->devargs, 0);
+	  }
+	  else
+	  {
+	    tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
+	  }
+	  vec_add1 (conf->eal_init_args, tmp);
+    }
     else if (num_whitelisted == 0 && devconf->is_blacklisted != 0)
-      {
-	tmp = format (0, "-b%c", 0);
-	vec_add1 (conf->eal_init_args, tmp);
-	tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
-	vec_add1 (conf->eal_init_args, tmp);
-      }
+    {
+	  tmp = format (0, "-b%c", 0);
+	  vec_add1 (conf->eal_init_args, tmp);
+	  tmp = format (0, "%U%c", format_vlib_pci_addr, &devconf->pci_addr, 0);
+	  vec_add1 (conf->eal_init_args, tmp);
+    }
   }));
   /* *INDENT-ON* */
 
diff --git a/src/vpp/conf/startup.conf b/src/vpp/conf/startup.conf
index 3d83a1336..b0d0c8664 100644
--- a/src/vpp/conf/startup.conf
+++ b/src/vpp/conf/startup.conf
@@ -105,6 +105,11 @@ cpu {
 		## Default is off
 		## To enable TSO, 'enable-tcp-udp-checksum' must be set
 		# tso on
+
+		## Devargs
+                ## device specific init args
+                ## Default is NULL
+		# devargs safe-mode-support=1,pipeline-mode-support=1
 	# }
 
 	## Whitelist specific interface by specifying PCI address
-- 
2.17.1