dev: new device driver infra

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

1 files changed, 128 insertions, 0 deletions

diff --git a/src/vnet/dev/counters.h b/src/vnet/dev/counters.h
new file mode 100644
index 00000000000..33d08ffbecd
--- /dev/null
+++ b/src/vnet/dev/counters.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2023 Cisco Systems, Inc.
+ */
+
+#ifndef _VNET_DEV_COUNTERS_H_
+#define _VNET_DEV_COUNTERS_H_
+
+#include <vnet/dev/dev.h>
+
+typedef enum
+{
+  VNET_DEV_CTR_DIR_NA,
+  VNET_DEV_CTR_DIR_RX,
+  VNET_DEV_CTR_DIR_TX,
+} __clib_packed vnet_dev_counter_direction_t;
+
+typedef enum
+{
+  VNET_DEV_CTR_TYPE_RX_BYTES,
+  VNET_DEV_CTR_TYPE_RX_PACKETS,
+  VNET_DEV_CTR_TYPE_RX_DROPS,
+  VNET_DEV_CTR_TYPE_TX_BYTES,
+  VNET_DEV_CTR_TYPE_TX_PACKETS,
+  VNET_DEV_CTR_TYPE_TX_DROPS,
+  VNET_DEV_CTR_TYPE_VENDOR,
+} __clib_packed vnet_dev_counter_type_t;
+
+typedef enum
+{
+  VNET_DEV_CTR_UNIT_NA,
+  VNET_DEV_CTR_UNIT_BYTES,
+  VNET_DEV_CTR_UNIT_PACKETS,
+} __clib_packed vnet_dev_counter_unit_t;
+
+typedef struct vnet_dev_counter
+{
+  char name[24];
+  uword user_data;
+  vnet_dev_counter_type_t type;
+  vnet_dev_counter_direction_t dir;
+  vnet_dev_counter_unit_t unit;
+  u16 index;
+} vnet_dev_counter_t;
+
+typedef struct vnet_dev_counter_main
+{
+  u8 *desc;
+  u64 *counter_data;
+  u64 *counter_start;
+  u16 n_counters;
+  vnet_dev_counter_t counters[];
+} vnet_dev_counter_main_t;
+
+#define VNET_DEV_CTR_RX_BYTES(p, ...)                                         \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_RX_BYTES, .dir = VNET_DEV_CTR_DIR_RX,           \
+    .unit = VNET_DEV_CTR_UNIT_BYTES, .user_data = (p), __VA_ARGS__            \
+  }
+#define VNET_DEV_CTR_TX_BYTES(p, ...)                                         \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_TX_BYTES, .dir = VNET_DEV_CTR_DIR_TX,           \
+    .unit = VNET_DEV_CTR_UNIT_BYTES, .user_data = (p), __VA_ARGS__            \
+  }
+#define VNET_DEV_CTR_RX_PACKETS(p, ...)                                       \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_RX_PACKETS, .dir = VNET_DEV_CTR_DIR_RX,         \
+    .unit = VNET_DEV_CTR_UNIT_PACKETS, .user_data = (p), __VA_ARGS__          \
+  }
+#define VNET_DEV_CTR_TX_PACKETS(p, ...)                                       \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_TX_PACKETS, .dir = VNET_DEV_CTR_DIR_TX,         \
+    .unit = VNET_DEV_CTR_UNIT_PACKETS, .user_data = (p), __VA_ARGS__          \
+  }
+#define VNET_DEV_CTR_RX_DROPS(p, ...)                                         \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_RX_DROPS, .dir = VNET_DEV_CTR_DIR_RX,           \
+    .unit = VNET_DEV_CTR_UNIT_PACKETS, .user_data = (p), __VA_ARGS__          \
+  }
+#define VNET_DEV_CTR_TX_DROPS(p, ...)                                         \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_TX_DROPS, .dir = VNET_DEV_CTR_DIR_TX,           \
+    .unit = VNET_DEV_CTR_UNIT_PACKETS, .user_data = (p), __VA_ARGS__          \
+  }
+#define VNET_DEV_CTR_VENDOR(p, d, u, n, ...)                                  \
+  {                                                                           \
+    .type = VNET_DEV_CTR_TYPE_VENDOR, .user_data = (p), .name = n,            \
+    .dir = VNET_DEV_CTR_DIR_##d, .unit = VNET_DEV_CTR_UNIT_##u, __VA_ARGS__   \
+  }
+
+vnet_dev_counter_main_t *vnet_dev_counters_alloc (vlib_main_t *,
+						  vnet_dev_counter_t *, u16,
+						  char *, ...);
+void vnet_dev_counters_clear (vlib_main_t *, vnet_dev_counter_main_t *);
+void vnet_dev_counters_free (vlib_main_t *, vnet_dev_counter_main_t *);
+
+format_function_t format_vnet_dev_counters;
+format_function_t format_vnet_dev_counters_all;
+
+static_always_inline vnet_dev_counter_main_t *
+vnet_dev_counter_get_main (vnet_dev_counter_t *counter)
+{
+  return (vnet_dev_counter_main_t *) ((u8 *) (counter - counter->index) -
+				      STRUCT_OFFSET_OF (
+					vnet_dev_counter_main_t, counters));
+}
+
+static_always_inline void
+vnet_dev_counter_value_add (vlib_main_t *vm, vnet_dev_counter_t *counter,
+			    u64 val)
+{
+  vnet_dev_counter_main_t *cm = vnet_dev_counter_get_main (counter);
+  cm->counter_data[counter->index] += val;
+}
+
+static_always_inline void
+vnet_dev_counter_value_update (vlib_main_t *vm, vnet_dev_counter_t *counter,
+			       u64 val)
+{
+  vnet_dev_counter_main_t *cm = vnet_dev_counter_get_main (counter);
+  cm->counter_data[counter->index] = val - cm->counter_start[counter->index];
+}
+
+#define foreach_vnet_dev_counter(c, cm)                                       \
+  if (cm)                                                                     \
+    for (typeof (*(cm)->counters) *(c) = (cm)->counters;                      \
+	 (c) < (cm)->counters + (cm)->n_counters; (c)++)
+
+#endif /* _VNET_DEV_COUNTERS_H_ */