Re: [dpdk-dev] [PATCH 09/20] common/mlx5: add write and read RXP registers

[Slava Ovsiienko <viacheslavo@mellanox.com>]

Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>

> -----Original Message-----
> From: Ori Kam <orika@mellanox.com>
> Sent: Sunday, July 5, 2020 12:24
> To: jerinj@marvell.com; xiang.w.wang@intel.com; Matan Azrad
> <matan@mellanox.com>; Slava Ovsiienko <viacheslavo@mellanox.com>;
> Shahaf Shuler <shahafs@mellanox.com>; Ray Kinsella <mdr@ashroe.eu>;
> Neil Horman <nhorman@tuxdriver.com>
> Cc: guyk@marvell.com; dev@dpdk.org; pbhagavatula@marvell.com;
> hemant.agrawal@nxp.com; Opher Reviv <opher@mellanox.com>; Alex
> Rosenbaum <alexr@mellanox.com>; dovrat@marvell.com;
> pkapoor@marvell.com; nipun.gupta@nxp.com;
> bruce.richardson@intel.com; yang.a.hong@intel.com;
> harry.chang@intel.com; gu.jian1@zte.com.cn;
> shanjiangh@chinatelecom.cn; zhangy.yun@chinatelecom.cn;
> lixingfu@huachentel.com; wushuai@inspur.com; yuyingxia@yxlink.com;
> fanchenggang@sunyainfo.com; davidfgao@tencent.com;
> liuzhong1@chinaunicom.cn; zhaoyong11@huawei.com; oc@yunify.com;
> jim@netgate.com; hongjun.ni@intel.com; deri@ntop.org;
> fc@napatech.com; arthur.su@lionic.com; Thomas Monjalon
> <thomas@monjalon.net>; Ori Kam <orika@mellanox.com>; Raslan
> Darawsheh <rasland@mellanox.com>
> Subject: [PATCH 09/20] common/mlx5: add write and read RXP registers
> 
> This commits add the write and read RXP registers functionality.
> 
> Signed-off-by: Ori Kam <orika@mellanox.com>
> ---
>  drivers/common/mlx5/mlx5_devx_cmds.c            | 78
> +++++++++++++++++++++++++
>  drivers/common/mlx5/mlx5_devx_cmds.h            | 10 ++++
>  drivers/common/mlx5/rte_common_mlx5_version.map |  2 +
>  3 files changed, 90 insertions(+)
> 
> diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c
> b/drivers/common/mlx5/mlx5_devx_cmds.c
> index f8760e6..4fad7cd 100644
> --- a/drivers/common/mlx5/mlx5_devx_cmds.c
> +++ b/drivers/common/mlx5/mlx5_devx_cmds.c
> @@ -1720,3 +1720,81 @@ struct mlx5_devx_obj *
>  	return 0;
>  }
> 
> +/**
> + * Write to RXP registers.
> + *
> + * @param ctx
> + *   ibv device handle
> + * @param engine_id
> + *   Chooses on which engine the register will be written..
> + * @param addr
> + *   Register address.
> + * @param data
> + *   Data to be written to the register.
> + *
> + * @return
> + *   0 on success, a negative errno value otherwise and rte_errno is set.
> + */
> +int
> +mlx5_devx_regex_register_write(struct ibv_context *ctx, int engine_id,
> +			       uint32_t addr, uint32_t data) {
> +	uint32_t out[DEVX_ST_SZ_DW(set_regexp_register_out)] = {};
> +	uint32_t in[DEVX_ST_SZ_DW(set_regexp_register_in)] = {};
> +	int ret;
> +
> +	DEVX_SET(set_regexp_register_in, in, opcode,
> +		 MLX5_CMD_SET_REGEX_REGISTERS);
> +	DEVX_SET(set_regexp_register_in, in, engine_id, engine_id);
> +	DEVX_SET(set_regexp_register_in, in, register_address, addr);
> +	DEVX_SET(set_regexp_register_in, in, register_data, data);
> +
> +	ret = mlx5_glue->devx_general_cmd(ctx, in, sizeof(in), out,
> +					  sizeof(out));
> +	if (ret) {
> +		DRV_LOG(ERR, "Set regexp register failed %d", ret);
> +		rte_errno = errno;
> +		return -errno;
> +	}
> +	return 0;
> +}
> +
> +
> +/**
> + * Read from RXP registers
> + *
> + * @param ctx
> + *   ibv device handle
> + * @param engine_id
> + *   Chooses from which engine to read.
> + * @param addr
> + *   Register address.
> + * @param data
> + *   Output containing the pointer to the data..
> + *
> + * @return
> + *   0 on success, a negative errno value otherwise and rte_errno is set.
> + */
> +int
> +mlx5_devx_regex_register_read(struct ibv_context *ctx, int engine_id,
> +			      uint32_t addr, uint32_t *data) {
> +	uint32_t out[DEVX_ST_SZ_DW(query_regexp_register_out)] = {};
> +	uint32_t in[DEVX_ST_SZ_DW(query_regexp_register_in)] = {};
> +	int ret;
> +
> +	DEVX_SET(query_regexp_register_in, in, opcode,
> +		 MLX5_CMD_QUERY_REGEX_REGISTERS);
> +	DEVX_SET(query_regexp_register_in, in, engine_id, engine_id);
> +	DEVX_SET(query_regexp_register_in, in, register_address, addr);
> +
> +	ret = mlx5_glue->devx_general_cmd(ctx, in, sizeof(in), out,
> +					  sizeof(out));
> +	if (ret) {
> +		DRV_LOG(ERR, "Query regexp register failed %d", ret);
> +		rte_errno = errno;
> +		return -errno;
> +	}
> +	*data = DEVX_GET(query_regexp_register_out, out, register_data);
> +	return 0;
> +}
> diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h
> b/drivers/common/mlx5/mlx5_devx_cmds.h
> index 655e31f..a2a9045 100644
> --- a/drivers/common/mlx5/mlx5_devx_cmds.h
> +++ b/drivers/common/mlx5/mlx5_devx_cmds.h
> @@ -374,6 +374,10 @@ int mlx5_devx_cmd_modify_qp_state(struct
> mlx5_devx_obj *qp,  __rte_internal  int mlx5_devx_cmd_modify_rqt(struct
> mlx5_devx_obj *rqt,
>  			     struct mlx5_devx_rqt_attr *rqt_attr);
> +int mlx5_devx_regex_register_write(struct ibv_context *ctx, int engine_id,
> +				   uint32_t addr, uint32_t data);
> +int mlx5_devx_regex_register_read(struct ibv_context *ctx, int engine_id,
> +				  uint32_t addr, uint32_t *data);
> 
>  /**
>   * Create virtio queue counters object DevX API.
> @@ -408,4 +412,10 @@ int mlx5_devx_cmd_query_virtio_q_counters(struct
> mlx5_devx_obj *couners_obj,  __rte_internal  int
> mlx5_devx_regex_database_program(void *ctx, uint8_t engine,
>  				     uint32_t umem_id, uint64_t
> umem_offset);
> +__rte_internal
> +int mlx5_devx_regex_register_read(struct ibv_context *ctx, int engine_id,
> +				  uint32_t addr, uint32_t *data);
> +__rte_internal
> +int mlx5_devx_regex_register_write(struct ibv_context *ctx, int engine_id,
> +				   uint32_t addr, uint32_t data);
>  #endif /* RTE_PMD_MLX5_DEVX_CMDS_H_ */
> diff --git a/drivers/common/mlx5/rte_common_mlx5_version.map
> b/drivers/common/mlx5/rte_common_mlx5_version.map
> index 6054d39..138719d 100644
> --- a/drivers/common/mlx5/rte_common_mlx5_version.map
> +++ b/drivers/common/mlx5/rte_common_mlx5_version.map
> @@ -38,6 +38,8 @@ INTERNAL {
>  	mlx5_devx_regex_database_program;
>  	mlx5_devx_regex_database_resume;
>  	mlx5_devx_regex_database_stop;
> +	mlx5_devx_regex_register_read;
> +	mlx5_devx_regex_register_write;
> 
>  	mlx5_get_ifname_sysfs;
>  	mlx5_get_dbr;
> --
> 1.8.3.1