avf: validate queue size config

Check CLI queue size is within the range of 64 and 4096
Enhance show hardware to display queue size and number of queues.

Type: improvement

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I360e3cdb2e69e4ea7380ed924e71a5ae84ed4b64

3 files changed, 52 insertions, 13 deletions

diff --git a/src/plugins/avf/avf.h b/src/plugins/avf/avf.h
index 43741dcad83..32d9cc61015 100644
--- a/src/plugins/avf/avf.h
+++ b/src/plugins/avf/avf.h
@@ -22,6 +22,9 @@
 
 #include <vlib/log.h>
 
+#define AVF_QUEUE_SZ_MAX                4096
+#define AVF_QUEUE_SZ_MIN                64
+
 #define AVF_AQ_ENQ_SUSPEND_TIME		50e-6
 #define AVF_AQ_ENQ_MAX_WAIT_TIME	250e-3
 
diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
index 0481e61b294..d7115044c05 100644
--- a/src/plugins/avf/device.c
+++ b/src/plugins/avf/device.c
@@ -1418,28 +1418,56 @@ avf_delete_if (vlib_main_t * vm, avf_device_t * ad, int with_barrier)
   clib_mem_free (ad);
 }
 
-void
-avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
+static u8
+avf_validate_queue_size (avf_create_if_args_t * args)
 {
-  vnet_main_t *vnm = vnet_get_main ();
-  avf_main_t *am = &avf_main;
-  avf_device_t *ad, **adp;
-  vlib_pci_dev_handle_t h;
   clib_error_t *error = 0;
-  int i;
 
-  /* check input args */
   args->rxq_size = (args->rxq_size == 0) ? AVF_RXQ_SZ : args->rxq_size;
   args->txq_size = (args->txq_size == 0) ? AVF_TXQ_SZ : args->txq_size;
 
-  if ((args->rxq_size & (args->rxq_size - 1))
-      || (args->txq_size & (args->txq_size - 1)))
+  if ((args->rxq_size > AVF_QUEUE_SZ_MAX)
+      || (args->txq_size > AVF_QUEUE_SZ_MAX))
+    {
+      args->rv = VNET_API_ERROR_INVALID_VALUE;
+      args->error =
+	clib_error_return (error, "queue size must not be greater than %u",
+			   AVF_QUEUE_SZ_MAX);
+      return 1;
+    }
+  if ((args->rxq_size < AVF_QUEUE_SZ_MIN)
+      || (args->txq_size < AVF_QUEUE_SZ_MIN))
+    {
+      args->rv = VNET_API_ERROR_INVALID_VALUE;
+      args->error =
+	clib_error_return (error, "queue size must not be smaller than %u",
+			   AVF_QUEUE_SZ_MIN);
+      return 1;
+    }
+  if ((args->rxq_size & (args->rxq_size - 1)) ||
+      (args->txq_size & (args->txq_size - 1)))
     {
       args->rv = VNET_API_ERROR_INVALID_VALUE;
       args->error =
 	clib_error_return (error, "queue size must be a power of two");
-      return;
+      return 1;
     }
+  return 0;
+}
+
+void
+avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  avf_main_t *am = &avf_main;
+  avf_device_t *ad, **adp;
+  vlib_pci_dev_handle_t h;
+  clib_error_t *error = 0;
+  int i;
+
+  /* check input args */
+  if (avf_validate_queue_size (args) != 0)
+    return;
 
   pool_get (am->devices, adp);
   adp[0] = ad = clib_mem_alloc_aligned (sizeof (avf_device_t),
diff --git a/src/plugins/avf/format.c b/src/plugins/avf/format.c
index e5da0e2bbf6..2c4eaf79041 100644
--- a/src/plugins/avf/format.c
+++ b/src/plugins/avf/format.c
@@ -90,8 +90,16 @@ format_avf_device (u8 * s, va_list * args)
   avf_device_t *ad = avf_get_device (i);
   u32 indent = format_get_indent (s);
   u8 *a = 0;
-
-  s = format (s, "flags: %U", format_avf_device_flags, ad);
+  avf_rxq_t *rxq = vec_elt_at_index (ad->rxqs, 0);
+  avf_txq_t *txq = vec_elt_at_index (ad->txqs, 0);
+
+  s = format (s, "rx: queues %u, desc %u (min %u max %u)", ad->n_rx_queues,
+	      rxq->size, AVF_QUEUE_SZ_MIN, AVF_QUEUE_SZ_MAX);
+  s = format (s, "\n%Utx: queues %u, desc %u (min %u max %u)",
+	      format_white_space, indent, ad->n_tx_queues, txq->size,
+	      AVF_QUEUE_SZ_MIN, AVF_QUEUE_SZ_MAX);
+  s = format (s, "\n%Uflags: %U", format_white_space, indent,
+	      format_avf_device_flags, ad);
   s = format (s, "\n%Uoffload features: %U", format_white_space, indent,
 	      format_avf_vf_cap_flags, ad->feature_bitmap);