From 7d666cfa9665760f8a6e85297a88fdfe9c331771 Mon Sep 17 00:00:00 2001
From: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Date: Thu, 1 Oct 2020 11:19:36 +0100
Subject: [PATCH] pipeline: add SWX pipeline instructions

The SWX pipeline instructions represent the main program that defines
the life of the packet. As packets go through tables that trigger
action subroutines, the headers and meta-data get transformed along
the way.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
---
 lib/librte_pipeline/rte_pipeline_version.map |  1 +
 lib/librte_pipeline/rte_swx_pipeline.c       | 36 ++++++++++++++++++++
 lib/librte_pipeline/rte_swx_pipeline.h       | 20 +++++++++++
 3 files changed, 57 insertions(+)

diff --git a/lib/librte_pipeline/rte_pipeline_version.map b/lib/librte_pipeline/rte_pipeline_version.map
index c6357cfe54..6fe0aa018e 100644
--- a/lib/librte_pipeline/rte_pipeline_version.map
+++ b/lib/librte_pipeline/rte_pipeline_version.map
@@ -68,6 +68,7 @@ EXPERIMENTAL {
 	rte_swx_pipeline_extern_type_member_func_register;
 	rte_swx_pipeline_extern_type_register;
 	rte_swx_pipeline_free;
+	rte_swx_pipeline_instructions_config;
 	rte_swx_pipeline_packet_header_register;
 	rte_swx_pipeline_packet_metadata_register;
 	rte_swx_pipeline_port_in_config;
diff --git a/lib/librte_pipeline/rte_swx_pipeline.c b/lib/librte_pipeline/rte_swx_pipeline.c
index eb5b327e8b..2ae6229d04 100644
--- a/lib/librte_pipeline/rte_swx_pipeline.c
+++ b/lib/librte_pipeline/rte_swx_pipeline.c
@@ -274,6 +274,10 @@ struct thread {
 	/* Extern objects and functions. */
 	struct extern_obj_runtime *extern_objs;
 	struct extern_func_runtime *extern_funcs;
+
+	/* Instructions. */
+	struct instruction *ip;
+	struct instruction *ret;
 };
 
 #ifndef RTE_SWX_PIPELINE_THREADS_MAX
@@ -300,6 +304,7 @@ struct rte_swx_pipeline {
 	struct port_out_runtime *out;
 	struct instruction **action_instructions;
 	struct rte_swx_table_state *table_state;
+	struct instruction *instructions;
 	struct thread threads[RTE_SWX_PIPELINE_THREADS_MAX];
 
 	uint32_t n_structs;
@@ -310,6 +315,7 @@ struct rte_swx_pipeline {
 	uint32_t n_actions;
 	uint32_t n_tables;
 	uint32_t n_headers;
+	uint32_t n_instructions;
 	int build_done;
 	int numa_node;
 };
@@ -1424,6 +1430,12 @@ metadata_free(struct rte_swx_pipeline *p)
 /*
  * Instruction.
  */
+static inline void
+thread_ip_reset(struct rte_swx_pipeline *p, struct thread *t)
+{
+	t->ip = p->instructions;
+}
+
 static int
 instruction_config(struct rte_swx_pipeline *p __rte_unused,
 		   struct action *a __rte_unused,
@@ -2110,6 +2122,8 @@ rte_swx_pipeline_free(struct rte_swx_pipeline *p)
 	if (!p)
 		return;
 
+	free(p->instructions);
+
 	table_state_free(p);
 	table_free(p);
 	action_free(p);
@@ -2124,6 +2138,28 @@ rte_swx_pipeline_free(struct rte_swx_pipeline *p)
 	free(p);
 }
 
+int
+rte_swx_pipeline_instructions_config(struct rte_swx_pipeline *p,
+				     const char **instructions,
+				     uint32_t n_instructions)
+{
+	int err;
+	uint32_t i;
+
+	err = instruction_config(p, NULL, instructions, n_instructions);
+	if (err)
+		return err;
+
+	/* Thread instruction pointer reset. */
+	for (i = 0; i < RTE_SWX_PIPELINE_THREADS_MAX; i++) {
+		struct thread *t = &p->threads[i];
+
+		thread_ip_reset(p, t);
+	}
+
+	return 0;
+}
+
 int
 rte_swx_pipeline_build(struct rte_swx_pipeline *p)
 {
diff --git a/lib/librte_pipeline/rte_swx_pipeline.h b/lib/librte_pipeline/rte_swx_pipeline.h
index 4d2af1be67..ec76294b02 100644
--- a/lib/librte_pipeline/rte_swx_pipeline.h
+++ b/lib/librte_pipeline/rte_swx_pipeline.h
@@ -495,6 +495,26 @@ rte_swx_pipeline_table_config(struct rte_swx_pipeline *p,
 			      const char *args,
 			      uint32_t size);
 
+/**
+ * Pipeline instructions configure
+ *
+ * @param[in] p
+ *   Pipeline handle.
+ * @param[in] instructions
+ *   Pipeline instructions.
+ * @param[in] n_instructions
+ *   Number of pipeline instructions.
+ * @return
+ *   0 on success or the following error codes otherwise:
+ *   -EINVAL: Invalid argument;
+ *   -ENOMEM: Not enough space/cannot allocate memory.
+ */
+__rte_experimental
+int
+rte_swx_pipeline_instructions_config(struct rte_swx_pipeline *p,
+				     const char **instructions,
+				     uint32_t n_instructions);
+
 /**
  * Pipeline build
  *
-- 
2.20.1