From 38f537635c15f10523c9e7fa93717c4248f9eaae Mon Sep 17 00:00:00 2001 From: Michael Baum Date: Wed, 6 Jan 2021 08:19:34 +0000 Subject: [PATCH] common/mlx5: share DevX SQ creation The SQ object in DevX is created in several places and in several different drivers. In all places almost all the details are the same, and in particular the allocations of the required resources. Add a structure that contains all the resources, and provide creation and release functions for it. Signed-off-by: Michael Baum Acked-by: Matan Azrad --- drivers/common/mlx5/mlx5_common_devx.c | 119 ++++++++++++++++++ drivers/common/mlx5/mlx5_common_devx.h | 27 +++- .../common/mlx5/rte_common_mlx5_exports.def | 2 + drivers/common/mlx5/version.map | 2 + 4 files changed, 148 insertions(+), 2 deletions(-) diff --git a/drivers/common/mlx5/mlx5_common_devx.c b/drivers/common/mlx5/mlx5_common_devx.c index 3ec0dd515a..58b75c318e 100644 --- a/drivers/common/mlx5/mlx5_common_devx.c +++ b/drivers/common/mlx5/mlx5_common_devx.c @@ -153,3 +153,122 @@ error: rte_errno = ret; return -rte_errno; } + +/** + * Destroy DevX Send Queue. + * + * @param[in] sq + * DevX SQ to destroy. + */ +void +mlx5_devx_sq_destroy(struct mlx5_devx_sq *sq) +{ + if (sq->sq) + claim_zero(mlx5_devx_cmd_destroy(sq->sq)); + if (sq->umem_obj) + claim_zero(mlx5_os_umem_dereg(sq->umem_obj)); + if (sq->umem_buf) + mlx5_free((void *)(uintptr_t)sq->umem_buf); +} + +/** + * Create Send Queue using DevX API. + * + * Get a pointer to partially initialized attributes structure, and updates the + * following fields: + * wq_type + * wq_umem_valid + * wq_umem_id + * wq_umem_offset + * dbr_umem_valid + * dbr_umem_id + * dbr_addr + * log_wq_stride + * log_wq_sz + * log_wq_pg_sz + * All other fields are updated by caller. + * + * @param[in] ctx + * Context returned from mlx5 open_device() glue function. + * @param[in/out] sq_obj + * Pointer to SQ to create. + * @param[in] log_wqbb_n + * Log of number of WQBBs in queue. + * @param[in] attr + * Pointer to SQ attributes structure. + * @param[in] socket + * Socket to use for allocation. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +int +mlx5_devx_sq_create(void *ctx, struct mlx5_devx_sq *sq_obj, uint16_t log_wqbb_n, + struct mlx5_devx_create_sq_attr *attr, int socket) +{ + struct mlx5_devx_obj *sq = NULL; + struct mlx5dv_devx_umem *umem_obj = NULL; + void *umem_buf = NULL; + size_t alignment = MLX5_WQE_BUF_ALIGNMENT; + uint32_t umem_size, umem_dbrec; + uint16_t sq_size = 1 << log_wqbb_n; + int ret; + + if (alignment == (size_t)-1) { + DRV_LOG(ERR, "Failed to get WQE buf alignment."); + rte_errno = ENOMEM; + return -rte_errno; + } + /* Allocate memory buffer for WQEs and doorbell record. */ + umem_size = MLX5_WQE_SIZE * sq_size; + umem_dbrec = RTE_ALIGN(umem_size, MLX5_DBR_SIZE); + umem_size += MLX5_DBR_SIZE; + umem_buf = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO, umem_size, + alignment, socket); + if (!umem_buf) { + DRV_LOG(ERR, "Failed to allocate memory for SQ."); + rte_errno = ENOMEM; + return -rte_errno; + } + /* Register allocated buffer in user space with DevX. */ + umem_obj = mlx5_os_umem_reg(ctx, (void *)(uintptr_t)umem_buf, umem_size, + IBV_ACCESS_LOCAL_WRITE); + if (!umem_obj) { + DRV_LOG(ERR, "Failed to register umem for SQ."); + rte_errno = errno; + goto error; + } + /* Fill attributes for SQ object creation. */ + attr->wq_attr.wq_type = MLX5_WQ_TYPE_CYCLIC; + attr->wq_attr.wq_umem_valid = 1; + attr->wq_attr.wq_umem_id = mlx5_os_get_umem_id(umem_obj); + attr->wq_attr.wq_umem_offset = 0; + attr->wq_attr.dbr_umem_valid = 1; + attr->wq_attr.dbr_umem_id = attr->wq_attr.wq_umem_id; + attr->wq_attr.dbr_addr = umem_dbrec; + attr->wq_attr.log_wq_stride = rte_log2_u32(MLX5_WQE_SIZE); + attr->wq_attr.log_wq_sz = log_wqbb_n; + attr->wq_attr.log_wq_pg_sz = MLX5_LOG_PAGE_SIZE; + /* Create send queue object with DevX. */ + sq = mlx5_devx_cmd_create_sq(ctx, attr); + if (!sq) { + DRV_LOG(ERR, "Can't create DevX SQ object."); + rte_errno = ENOMEM; + goto error; + } + sq_obj->umem_buf = umem_buf; + sq_obj->umem_obj = umem_obj; + sq_obj->sq = sq; + sq_obj->db_rec = RTE_PTR_ADD(sq_obj->umem_buf, umem_dbrec); + return 0; +error: + ret = rte_errno; + if (umem_obj) + claim_zero(mlx5_os_umem_dereg(umem_obj)); + if (umem_buf) + mlx5_free((void *)(uintptr_t)umem_buf); + rte_errno = ret; + return -rte_errno; +} + + diff --git a/drivers/common/mlx5/mlx5_common_devx.h b/drivers/common/mlx5/mlx5_common_devx.h index 20d5da0925..6b078b2863 100644 --- a/drivers/common/mlx5/mlx5_common_devx.h +++ b/drivers/common/mlx5/mlx5_common_devx.h @@ -7,6 +7,9 @@ #include "mlx5_devx_cmds.h" +/* The standard page size */ +#define MLX5_LOG_PAGE_SIZE 12 + /* DevX Completion Queue structure. */ struct mlx5_devx_cq { struct mlx5_devx_obj *cq; /* The CQ DevX object. */ @@ -18,6 +21,18 @@ struct mlx5_devx_cq { volatile uint32_t *db_rec; /* The CQ doorbell record. */ }; +/* DevX Send Queue structure. */ +struct mlx5_devx_sq { + struct mlx5_devx_obj *sq; /* The SQ DevX object. */ + void *umem_obj; /* The SQ umem object. */ + union { + volatile void *umem_buf; + volatile struct mlx5_wqe *wqes; /* The SQ ring buffer. */ + }; + volatile uint32_t *db_rec; /* The SQ doorbell record. */ +}; + + /* mlx5_common_devx.c */ __rte_internal @@ -25,7 +40,15 @@ void mlx5_devx_cq_destroy(struct mlx5_devx_cq *cq); __rte_internal int mlx5_devx_cq_create(void *ctx, struct mlx5_devx_cq *cq_obj, - uint16_t log_desc_n, struct mlx5_devx_cq_attr *attr, - int socket); + uint16_t log_desc_n, + struct mlx5_devx_cq_attr *attr, int socket); + +__rte_internal +void mlx5_devx_sq_destroy(struct mlx5_devx_sq *sq); + +__rte_internal +int mlx5_devx_sq_create(void *ctx, struct mlx5_devx_sq *sq_obj, + uint16_t log_wqbb_n, + struct mlx5_devx_create_sq_attr *attr, int socket); #endif /* RTE_PMD_MLX5_COMMON_DEVX_H_ */ diff --git a/drivers/common/mlx5/rte_common_mlx5_exports.def b/drivers/common/mlx5/rte_common_mlx5_exports.def index 613799170f..68073c9097 100644 --- a/drivers/common/mlx5/rte_common_mlx5_exports.def +++ b/drivers/common/mlx5/rte_common_mlx5_exports.def @@ -37,6 +37,8 @@ EXPORTS mlx5_devx_cq_create mlx5_devx_cq_destroy + mlx5_devx_sq_create + mlx5_devx_sq_destroy mlx5_get_dbr mlx5_glue diff --git a/drivers/common/mlx5/version.map b/drivers/common/mlx5/version.map index 4a07fb5071..ea628ebff0 100644 --- a/drivers/common/mlx5/version.map +++ b/drivers/common/mlx5/version.map @@ -45,6 +45,8 @@ INTERNAL { mlx5_devx_cq_create; mlx5_devx_cq_destroy; + mlx5_devx_sq_create; + mlx5_devx_sq_destroy; mlx5_get_ifname_sysfs; mlx5_get_dbr; -- 2.20.1