dev: new device driver infra

Type: feature
Change-Id: I20c56e0d3103624407f18365c2bc1273dea5c199
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 132 insertions, 0 deletions

diff --git a/src/vnet/dev/counters.c b/src/vnet/dev/counters.c
new file mode 100644
index 00000000000..0a1e0a7419d
--- /dev/null
+++ b/src/vnet/dev/counters.c
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2023 Cisco Systems, Inc.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/dev/dev.h>
+#include <vnet/dev/counters.h>
+#include <vnet/dev/log.h>
+#include <vnet/interface/rx_queue_funcs.h>
+
+VLIB_REGISTER_LOG_CLASS (dev_log, static) = {
+  .class_name = "dev",
+  .subclass_name = "counters",
+};
+
+vnet_dev_counter_main_t *
+vnet_dev_counters_alloc (vlib_main_t *vm, vnet_dev_counter_t *counters,
+			 u16 n_counters, char *fmt, ...)
+{
+  vnet_dev_counter_t *c;
+  vnet_dev_counter_main_t *cm;
+  u32 alloc_sz;
+
+  alloc_sz = sizeof (*cm) + n_counters * sizeof (*c);
+  cm = clib_mem_alloc_aligned (alloc_sz, CLIB_CACHE_LINE_BYTES);
+  clib_memset (cm, 0, sizeof (*cm));
+  cm->n_counters = n_counters;
+
+  if (fmt && strlen (fmt))
+    {
+      va_list va;
+      va_start (va, fmt);
+      cm->desc = va_format (0, fmt, &va);
+      va_end (va);
+    }
+
+  for (u32 i = 0; i < n_counters; i++)
+    {
+      cm->counters[i] = counters[i];
+      cm->counters[i].index = i;
+    }
+
+  vec_validate_aligned (cm->counter_data, n_counters - 1,
+			CLIB_CACHE_LINE_BYTES);
+  vec_validate_aligned (cm->counter_start, n_counters - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  return cm;
+}
+
+void
+vnet_dev_counters_clear (vlib_main_t *vm, vnet_dev_counter_main_t *cm)
+{
+  for (int i = 0; i < cm->n_counters; i++)
+    {
+      cm->counter_start[i] = cm->counter_data[i];
+      cm->counter_data[i] = 0;
+    }
+}
+
+void
+vnet_dev_counters_free (vlib_main_t *vm, vnet_dev_counter_main_t *cm)
+{
+  vec_free (cm->desc);
+  vec_free (cm->counter_data);
+  vec_free (cm->counter_start);
+  clib_mem_free (cm);
+}
+
+u8 *
+format_vnet_dev_counter_name (u8 *s, va_list *va)
+{
+  vnet_dev_counter_t *c = va_arg (*va, vnet_dev_counter_t *);
+
+  char *std_counters[] = {
+    [VNET_DEV_CTR_TYPE_RX_BYTES] = "total bytes received",
+    [VNET_DEV_CTR_TYPE_TX_BYTES] = "total bytes transmitted",
+    [VNET_DEV_CTR_TYPE_RX_PACKETS] = "total packets received",
+    [VNET_DEV_CTR_TYPE_TX_PACKETS] = "total packets transmitted",
+    [VNET_DEV_CTR_TYPE_RX_DROPS] = "total drops received",
+    [VNET_DEV_CTR_TYPE_TX_DROPS] = "total drops transmitted",
+  };
+
+  char *directions[] = {
+    [VNET_DEV_CTR_DIR_RX] = "received",
+    [VNET_DEV_CTR_DIR_TX] = "sent",
+  };
+  char *units[] = {
+    [VNET_DEV_CTR_UNIT_BYTES] = "bytes",
+    [VNET_DEV_CTR_UNIT_PACKETS] = "packets",
+  };
+
+  if (c->type == VNET_DEV_CTR_TYPE_VENDOR)
+    {
+      s = format (s, "%s", c->name);
+
+      if (c->unit < ARRAY_LEN (units) && units[c->unit])
+	s = format (s, " %s", units[c->unit]);
+
+      if (c->dir < ARRAY_LEN (directions) && directions[c->dir])
+	s = format (s, " %s", directions[c->dir]);
+    }
+  else if (c->type < ARRAY_LEN (std_counters) && std_counters[c->type])
+    s = format (s, "%s", std_counters[c->type]);
+  else
+    ASSERT (0);
+
+  return s;
+}
+
+u8 *
+format_vnet_dev_counters (u8 *s, va_list *va)
+{
+  vnet_dev_format_args_t *a = va_arg (*va, vnet_dev_format_args_t *);
+  vnet_dev_counter_main_t *cm = va_arg (*va, vnet_dev_counter_main_t *);
+  u32 line = 0, indent = format_get_indent (s);
+
+  foreach_vnet_dev_counter (c, cm)
+    {
+      if (a->show_zero_counters == 0 && cm->counter_data[c->index] == 0)
+	continue;
+
+      if (line++)
+	s = format (s, "\n%U", format_white_space, indent);
+
+      s = format (s, "%-45U%lu", format_vnet_dev_counter_name, c,
+		  cm->counter_data[c->index]);
+    }
+
+  return s;
+}