[PATCH v3 1/9] net/cpfl: parse flow parser file in devargs

[Wenjing Qiao <wenjing.qiao@intel.com>]

Add devargs "flow_parser" for rte_flow json parser.

Signed-off-by: Wenjing Qiao <wenjing.qiao@intel.com>
---
 doc/guides/nics/cpfl.rst       | 32 ++++++++++++++++++++++++++++
 drivers/net/cpfl/cpfl_ethdev.c | 38 +++++++++++++++++++++++++++++++++-
 drivers/net/cpfl/cpfl_ethdev.h |  3 +++
 drivers/net/cpfl/meson.build   |  6 ++++++
 4 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/cpfl.rst b/doc/guides/nics/cpfl.rst
index c20334230b..7032dd1a1a 100644
--- a/doc/guides/nics/cpfl.rst
+++ b/doc/guides/nics/cpfl.rst
@@ -128,12 +128,24 @@ Runtime Configuration
 
     -a BDF,representor=vf[0-3],representor=c1pf1
 
+- ``flow_parser`` (default ``not enabled``)
+
+  The PMD supports using a JSON file to parse rte_flow tokens into low level hardware
+  resources defined in a DDP package file.
+
+  The user can specify the path of json file, for example::
+
+    -a ca:00.0,flow_parser="refpkg.json"
+
+  Then the PMD will load json file for device ``ca:00.0``.
+  The parameter is optional.
 
 Driver compilation and testing
 ------------------------------
 
 Refer to the document :doc:`build_and_test` for details.
 
+Rte flow need to install json-c library.
 
 Features
 --------
@@ -164,3 +176,23 @@ Hairpin queue
 E2100 Series can loopback packets from RX port to TX port.
 This feature is called port-to-port or hairpin.
 Currently, the PMD only supports single port hairpin.
+
+Rte_flow
+~~~~~~~~~~~~~
+
+Rte_flow uses a json file to direct CPF PMD to parse rte_flow tokens into
+low level hardware resources defined in a DDP package file.
+
+#. install json-c library::
+
+   .. code-block:: console
+
+   git clone https://github.com/json-c/json-c.git
+   cd json-c
+   git checkout 777dd06be83ef7fac71c2218b565557cd068a714
+
+#. run testpmd with the json file::
+
+   .. code-block:: console
+
+   dpdk-testpmd -c 0x3 -n 4 -a 0000:af:00.6,vport=[0],flow_parser="refpkg.json" -- -i
diff --git a/drivers/net/cpfl/cpfl_ethdev.c b/drivers/net/cpfl/cpfl_ethdev.c
index 88c1479f3a..3c4a6a4724 100644
--- a/drivers/net/cpfl/cpfl_ethdev.c
+++ b/drivers/net/cpfl/cpfl_ethdev.c
@@ -21,6 +21,10 @@
 #define CPFL_RX_SINGLE_Q	"rx_single"
 #define CPFL_VPORT		"vport"
 
+#ifdef CPFL_FLOW_JSON_SUPPORT
+#define CPFL_FLOW_PARSER	"flow_parser"
+#endif
+
 rte_spinlock_t cpfl_adapter_lock;
 /* A list for all adapters, one adapter matches one PCI device */
 struct cpfl_adapter_list cpfl_adapter_list;
@@ -31,6 +35,9 @@ static const char * const cpfl_valid_args_first[] = {
 	CPFL_TX_SINGLE_Q,
 	CPFL_RX_SINGLE_Q,
 	CPFL_VPORT,
+#ifdef CPFL_FLOW_JSON_SUPPORT
+	CPFL_FLOW_PARSER,
+#endif
 	NULL
 };
 
@@ -1537,6 +1544,24 @@ parse_repr(const char *key __rte_unused, const char *value, void *args)
 	return 0;
 }
 
+#ifdef CPFL_FLOW_JSON_SUPPORT
+static int
+parse_file(const char *key, const char *value, void *args)
+{
+	char *name = args;
+
+	if (strlen(value) > CPFL_FLOW_FILE_LEN - 1) {
+		PMD_DRV_LOG(ERR, "file path(%s) is too long.", value);
+		return -1;
+	}
+
+	PMD_DRV_LOG(DEBUG, "value:\"%s\" for key:\"%s\"", value, key);
+	strlcpy(name, value, CPFL_FLOW_FILE_LEN);
+
+	return 0;
+}
+#endif
+
 static int
 cpfl_parse_devargs(struct rte_pci_device *pci_dev, struct cpfl_adapter_ext *adapter, bool first)
 {
@@ -1585,7 +1610,18 @@ cpfl_parse_devargs(struct rte_pci_device *pci_dev, struct cpfl_adapter_ext *adap
 				 &adapter->base.is_rx_singleq);
 	if (ret != 0)
 		goto fail;
-
+#ifdef CPFL_FLOW_JSON_SUPPORT
+	if (rte_kvargs_get(kvlist, CPFL_FLOW_PARSER)) {
+		ret = rte_kvargs_process(kvlist, CPFL_FLOW_PARSER,
+					 &parse_file, cpfl_args->flow_parser);
+		if (ret) {
+			PMD_DRV_LOG(ERR, "Failed to parser flow_parser, ret: %d", ret);
+			goto fail;
+		}
+	} else {
+		cpfl_args->flow_parser[0] = '\0';
+	}
+#endif
 fail:
 	rte_kvargs_free(kvlist);
 	return ret;
diff --git a/drivers/net/cpfl/cpfl_ethdev.h b/drivers/net/cpfl/cpfl_ethdev.h
index a891bd8df9..ed730cc0e9 100644
--- a/drivers/net/cpfl/cpfl_ethdev.h
+++ b/drivers/net/cpfl/cpfl_ethdev.h
@@ -87,6 +87,8 @@
 #define ACC_LCE_ID	15
 #define IMC_MBX_EFD_ID	0
 
+#define CPFL_FLOW_FILE_LEN 100
+
 struct cpfl_vport_param {
 	struct cpfl_adapter_ext *adapter;
 	uint16_t devarg_id; /* arg id from user */
@@ -100,6 +102,7 @@ struct cpfl_devargs {
 	uint16_t req_vport_nb;
 	uint8_t repr_args_num;
 	struct rte_eth_devargs repr_args[CPFL_REPR_ARG_NUM_MAX];
+	char flow_parser[CPFL_FLOW_FILE_LEN];
 };
 
 struct p2p_queue_chunks_info {
diff --git a/drivers/net/cpfl/meson.build b/drivers/net/cpfl/meson.build
index fb075c6860..0be25512c3 100644
--- a/drivers/net/cpfl/meson.build
+++ b/drivers/net/cpfl/meson.build
@@ -38,3 +38,9 @@ if arch_subdir == 'x86'
         cflags += ['-DCC_AVX512_SUPPORT']
     endif
 endif
+
+js_dep = dependency('json-c', required: false, method : 'pkg-config')
+if js_dep.found()
+    dpdk_conf.set('CPFL_FLOW_JSON_SUPPORT', true)
+    ext_deps += js_dep
+endif
\ No newline at end of file
-- 
2.34.1