--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) 2015-2017 Atomic Rules LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _ARK_MPU_H_
+#define _ARK_MPU_H_
+
+#include <stdint.h>
+
+#include <rte_memory.h>
+
+/* The MPU or Memory Prefetch Unit is an internal Arkville hardware
+ * module for moving data between host memory and the hardware FPGA.
+ * This module is *not* intended for end-user manipulation, hence
+ * there is minimal documentation.
+ */
+
+/*
+ * MPU hardware structures
+ * These are overlay structures to a memory mapped FPGA device. These
+ * structs will never be instantiated in ram memory
+ */
+
+#define ARK_MPU_ID 0x00
+struct ark_mpu_id_t {
+ union {
+ char id[4];
+ uint32_t idnum;
+ };
+ union {
+ char ver[4];
+ uint32_t vernum;
+ };
+ uint32_t phys_id;
+ uint32_t mrr_code;
+};
+
+#define ARK_MPU_HW 0x010
+struct ark_mpu_hw_t {
+ uint16_t num_queues;
+ uint16_t reserved;
+ uint32_t hw_depth;
+ uint32_t obj_size;
+ uint32_t obj_per_mrr;
+};
+
+#define ARK_MPU_CFG 0x040
+struct ark_mpu_cfg_t {
+ phys_addr_t ring_base; /* phys_addr_t is a uint64_t */
+ uint32_t ring_size;
+ uint32_t ring_mask;
+ uint32_t min_host_move;
+ uint32_t min_hw_move;
+ volatile uint32_t sw_prod_index;
+ volatile uint32_t hw_cons_index;
+ volatile uint32_t command;
+};
+enum ARK_MPU_COMMAND {
+ MPU_CMD_IDLE = 1,
+ MPU_CMD_RUN = 2,
+ MPU_CMD_STOP = 4,
+ MPU_CMD_RESET = 8,
+ MPU_CMD_FORCE_RESET = 16,
+ MPU_COMMAND_LIMIT = 0xfFFFFFFF
+};
+
+#define ARK_MPU_STATS 0x080
+struct ark_mpu_stats_t {
+ volatile uint64_t pci_request;
+ volatile uint64_t q_empty;
+ volatile uint64_t q_q1;
+ volatile uint64_t q_q2;
+ volatile uint64_t q_q3;
+ volatile uint64_t q_q4;
+ volatile uint64_t q_full;
+};
+
+#define ARK_MPU_DEBUG 0x0C0
+struct ark_mpu_debug_t {
+ volatile uint32_t state;
+ uint32_t reserved;
+ volatile uint32_t count;
+ volatile uint32_t take;
+ volatile uint32_t peek[4];
+};
+
+/* Consolidated structure */
+struct ark_mpu_t {
+ struct ark_mpu_id_t id;
+ uint8_t reserved0[(ARK_MPU_HW - ARK_MPU_ID)
+ - sizeof(struct ark_mpu_id_t)];
+ struct ark_mpu_hw_t hw;
+ uint8_t reserved1[(ARK_MPU_CFG - ARK_MPU_HW) -
+ sizeof(struct ark_mpu_hw_t)];
+ struct ark_mpu_cfg_t cfg;
+ uint8_t reserved2[(ARK_MPU_STATS - ARK_MPU_CFG) -
+ sizeof(struct ark_mpu_cfg_t)];
+ struct ark_mpu_stats_t stats;
+ uint8_t reserved3[(ARK_MPU_DEBUG - ARK_MPU_STATS) -
+ sizeof(struct ark_mpu_stats_t)];
+ struct ark_mpu_debug_t debug;
+};
+
+uint16_t ark_api_num_queues(struct ark_mpu_t *mpu);
+uint16_t ark_api_num_queues_per_port(struct ark_mpu_t *mpu,
+ uint16_t ark_ports);
+int ark_mpu_verify(struct ark_mpu_t *mpu, uint32_t obj_size);
+void ark_mpu_stop(struct ark_mpu_t *mpu);
+void ark_mpu_start(struct ark_mpu_t *mpu);
+int ark_mpu_reset(struct ark_mpu_t *mpu);
+int ark_mpu_configure(struct ark_mpu_t *mpu, phys_addr_t ring,
+ uint32_t ring_size, int is_tx);
+
+void ark_mpu_dump(struct ark_mpu_t *mpu, const char *msg, uint16_t idx);
+void ark_mpu_dump_setup(struct ark_mpu_t *mpu, uint16_t qid);
+void ark_mpu_reset_stats(struct ark_mpu_t *mpu);
+
+/* this action is in a performance critical path */
+static inline void
+ark_mpu_set_producer(struct ark_mpu_t *mpu, uint32_t idx)
+{
+ mpu->cfg.sw_prod_index = idx;
+}
+
+#endif
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