1 files changed, 82 insertions, 0 deletions
diff --git a/src/vlib/dma/dma.c b/src/vlib/dma/dma.c
new file mode 100644
index 00000000000..cc8ed94ea8f
--- /dev/null
+++ b/src/vlib/dma/dma.c
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2022 Cisco Systems, Inc.
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/log.h>
+#include <vlib/dma/dma.h>
+
+VLIB_REGISTER_LOG_CLASS (dma_log) = {
+  .class_name = "dma",
+};
+
+vlib_dma_main_t vlib_dma_main = {};
+
+clib_error_t *
+vlib_dma_register_backend (vlib_main_t *vm, vlib_dma_backend_t *b)
+{
+  vlib_dma_main_t *dm = &vlib_dma_main;
+  vec_add1 (dm->backends, *b);
+  dma_log_info ("backend '%s' registered", b->name);
+  return 0;
+}
+
+int
+vlib_dma_config_add (vlib_main_t *vm, vlib_dma_config_t *c)
+{
+  vlib_dma_main_t *dm = &vlib_dma_main;
+  vlib_dma_backend_t *b;
+  vlib_dma_config_data_t *cd;
+
+  pool_get_zero (dm->configs, cd);
+  cd->config_index = cd - dm->configs;
+
+  clib_memcpy (&cd->cfg, c, sizeof (vlib_dma_config_t));
+
+  vec_foreach (b, dm->backends)
+    {
+      dma_log_info ("calling '%s' config_add_fn", b->name);
+      if (b->config_add_fn (vm, cd))
+	{
+	  dma_log_info ("config %u added into backend %s", cd - dm->configs,
+			b->name);
+	  cd->backend_index = b - dm->backends;
+	  return cd - dm->configs;
+	}
+    }
+
+  pool_put (dm->configs, cd);
+  return -1;
+}
+
+void
+vlib_dma_config_del (vlib_main_t *vm, u32 config_index)
+{
+  vlib_dma_main_t *dm = &vlib_dma_main;
+  vlib_dma_config_data_t *cd = pool_elt_at_index (dm->configs, config_index);
+  vlib_dma_backend_t *b = vec_elt_at_index (dm->backends, cd->backend_index);
+
+  if (b->config_del_fn)
+    b->config_del_fn (vm, cd);
+
+  pool_put (dm->configs, cd);
+  dma_log_info ("config %u deleted from backend %s", config_index, b->name);
+}
+
+u8 *
+vlib_dma_config_info (u8 *s, va_list *args)
+{
+  vlib_dma_main_t *dm = &vlib_dma_main;
+  int config_index = va_arg (*args, int);
+  u32 len = pool_elts (dm->configs);
+  if (config_index >= len)
+    return format (s, "%s", "not found");
+  vlib_dma_config_data_t *cd = pool_elt_at_index (dm->configs, config_index);
+
+  vlib_dma_backend_t *b = vec_elt_at_index (dm->backends, cd->backend_index);
+
+  if (b->info_fn)
+    return b->info_fn (s, args);
+
+  return 0;
+}