diff options
Diffstat (limited to 'src/seastar/dpdk/drivers/net/ark/ark_mpu.h')
| -rw-r--r-- | src/seastar/dpdk/drivers/net/ark/ark_mpu.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/seastar/dpdk/drivers/net/ark/ark_mpu.h b/src/seastar/dpdk/drivers/net/ark/ark_mpu.h new file mode 100644 index 000000000..92c3e67c8 --- /dev/null +++ b/src/seastar/dpdk/drivers/net/ark/ark_mpu.h @@ -0,0 +1,125 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright (c) 2015-2018 Atomic Rules LLC + */ + +#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 { + rte_iova_t ring_base; /* rte_iova_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, rte_iova_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 |