net/ipn3ke: support flow API

Add Intel FPGA Acceleration NIC IPN3KE Flow of PMD driver.

Signed-off-by: Rosen Xu <rosen.xu@intel.com>
Signed-off-by: Andy Pei <andy.pei@intel.com>
Signed-off-by: Dan Wei <dan.wei@intel.com>

drivers/net/ipn3ke/Makefile

@@ -35,5 +35,6 @@ LIBABIVER := 1
 SRCS-$(CONFIG_RTE_LIBRTE_IPN3KE_PMD) += ipn3ke_ethdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_IPN3KE_PMD) += ipn3ke_representor.c
 SRCS-$(CONFIG_RTE_LIBRTE_IPN3KE_PMD) += ipn3ke_tm.c
+SRCS-$(CONFIG_RTE_LIBRTE_IPN3KE_PMD) += ipn3ke_flow.c
 
 include $(RTE_SDK)/mk/rte.lib.mk

drivers/net/ipn3ke/ipn3ke_ethdev.c

@@ -21,6 +21,7 @@
 #include <ifpga_logs.h>
 
 #include "ipn3ke_rawdev_api.h"
+#include "ipn3ke_flow.h"
 #include "ipn3ke_logs.h"
 #include "ipn3ke_ethdev.h"
 
@@ -266,6 +267,10 @@ ipn3ke_hw_init(struct rte_afu_device *afu_dev,
 		if (ret)
 			return ret;
 		hw->tm_hw_enable = 1;
+
+		ret = ipn3ke_flow_init(hw);
+		if (ret)
+			return ret;
 		hw->flow_hw_enable = 1;
 	}
 

drivers/net/ipn3ke/ipn3ke_ethdev.h

@@ -291,6 +291,7 @@ struct ipn3ke_hw {
 	uint32_t acc_tm;
 	uint32_t acc_flow;
 
+	struct ipn3ke_flow_list flow_list;
 	uint32_t flow_max_entries;
 	uint32_t flow_num_entries;
 

drivers/net/ipn3ke/ipn3ke_flow.h

@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#ifndef _IPN3KE_FLOW_H_
+#define _IPN3KE_FLOW_H_
+
+/**
+ * Expand the length to DWORD alignment with 'Unused' field.
+ *
+ * FLOW KEY:
+ *  | Unused |Ruler id (id)  | Key1 Key2 … (data) |
+ *  |--------+---------------+--------------------|
+ *  | 17bits |    3 bits     |   Total 108 bits   |
+ * MSB                 --->                      LSB
+ *
+ * Note: And the MSb of key data is filled to 0 when it is less
+ *       than 108 bit.
+ */
+#define IPN3KE_FLOW_KEY_UNUSED_BITS  17
+#define IPN3KE_FLOW_KEY_ID_BITS      3
+#define IPN3KE_FLOW_KEY_DATA_BITS    108
+
+#define IPN3KE_FLOW_KEY_TOTAL_BITS \
+		(IPN3KE_FLOW_KEY_UNUSED_BITS + \
+		IPN3KE_FLOW_KEY_ID_BITS + \
+		IPN3KE_FLOW_KEY_DATA_BITS)
+
+#define IPN3KE_FLOW_KEY_ID_OFFSET \
+		(IPN3KE_FLOW_KEY_UNUSED_BITS)
+
+#define IPN3KE_FLOW_KEY_DATA_OFFSET \
+		(IPN3KE_FLOW_KEY_ID_OFFSET + IPN3KE_FLOW_KEY_ID_BITS)
+
+/**
+ * Expand the length to DWORD alignment with 'Unused' field.
+ *
+ * FLOW RESULT:
+ *  |  Unused | enable (acl) |    uid       |
+ *  |---------+--------------+--------------|
+ *  | 15 bits |    1 bit     |   16 bits    |
+ * MSB              --->                   LSB
+ */
+
+#define IPN3KE_FLOW_RESULT_UNUSED_BITS 15
+#define IPN3KE_FLOW_RESULT_ACL_BITS    1
+#define IPN3KE_FLOW_RESULT_UID_BITS    16
+
+#define IPN3KE_FLOW_RESULT_TOTAL_BITS \
+		(IPN3KE_FLOW_RESULT_UNUSED_BITS + \
+		IPN3KE_FLOW_RESULT_ACL_BITS + \
+		IPN3KE_FLOW_RESULT_UID_BITS)
+
+#define IPN3KE_FLOW_RESULT_ACL_OFFSET \
+		(IPN3KE_FLOW_RESULT_UNUSED_BITS)
+
+#define IPN3KE_FLOW_RESULT_UID_OFFSET \
+		(IPN3KE_FLOW_RESULT_ACL_OFFSET + IPN3KE_FLOW_RESULT_ACL_BITS)
+
+#define IPN3KE_FLOW_RESULT_UID_MAX \
+		((1UL << IPN3KE_FLOW_RESULT_UID_BITS) - 1)
+
+#ifndef BITS_PER_BYTE
+#define BITS_PER_BYTE    8
+#endif
+#define BITS_TO_BYTES(bits) \
+	(((bits) + BITS_PER_BYTE - 1) / BITS_PER_BYTE)
+
+struct ipn3ke_flow_rule {
+	uint8_t key[BITS_TO_BYTES(IPN3KE_FLOW_KEY_TOTAL_BITS)];
+	uint8_t result[BITS_TO_BYTES(IPN3KE_FLOW_RESULT_TOTAL_BITS)];
+};
+
+struct rte_flow {
+	TAILQ_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
+
+	struct ipn3ke_flow_rule rule;
+};
+
+TAILQ_HEAD(ipn3ke_flow_list, rte_flow);
+
+static inline uint16_t ipn3ke_swap16(uint16_t x)
+{
+	return ((x & 0xff) << 8) | ((x >> 8) & 0xff);
+}
+
+static inline uint32_t ipn3ke_swap32(uint32_t x)
+{
+	uint32_t high, low;
+	uint32_t high1, low1;
+
+	high = (x >> 16) & 0xffff;
+	low = x & 0xffff;
+	high1 = ipn3ke_swap16(low);
+	high1 = high1 << 16;
+	low1 = ipn3ke_swap16(high);
+	low1 = low1 & 0xffff;
+
+	return high1 | low1;
+}
+
+extern const struct rte_flow_ops ipn3ke_flow_ops;
+
+int ipn3ke_flow_init(void *dev);
+
+#endif /* _IPN3KE_FLOW_H_ */

drivers/net/ipn3ke/ipn3ke_representor.c

@@ -21,6 +21,7 @@
 #include <ifpga_logs.h>
 
 #include "ipn3ke_rawdev_api.h"
+#include "ipn3ke_flow.h"
 #include "ipn3ke_logs.h"
 #include "ipn3ke_ethdev.h"
 
@@ -746,7 +747,7 @@ ipn3ke_afu_filter_ctrl(struct rte_eth_dev *ethdev,
 		case RTE_ETH_FILTER_GENERIC:
 			if (filter_op != RTE_ETH_FILTER_GET)
 				return -EINVAL;
-			*(const void **)arg = NULL;
+			*(const void **)arg = &ipn3ke_flow_ops;
 			break;
 		default:
 			IPN3KE_AFU_PMD_WARN("Filter type (%d) not supported",

drivers/net/ipn3ke/ipn3ke_tm.c

@@ -23,6 +23,7 @@
 #include <ifpga_logs.h>
 
 #include "ipn3ke_rawdev_api.h"
+#include "ipn3ke_flow.h"
 #include "ipn3ke_logs.h"
 #include "ipn3ke_ethdev.h"
 

drivers/net/ipn3ke/meson.build

@@ -12,5 +12,6 @@ allow_experimental_apis = true
 
 sources += files('ipn3ke_ethdev.c',
 	'ipn3ke_representor.c',
-	'ipn3ke_tm.c')
+	'ipn3ke_tm.c',
+	'ipn3ke_flow.c')
 deps += ['bus_ifpga', 'sched']