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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (c) 2016 HGST, a Western Digital Company. */#ifndef _RDMA_RW_H#define _RDMA_RW_H
#include <linux/bvec.h>#include <linux/dma-mapping.h>#include <linux/scatterlist.h>#include <rdma/ib_verbs.h>#include <rdma/rdma_cm.h>#include <rdma/mr_pool.h>
struct rdma_rw_ctx { /* number of RDMA READ/WRITE WRs (not counting MR WRs) */ u32 nr_ops;
/* tag for the union below: */ u8 type;
union { /* for mapping a single SGE: */ struct { struct ib_sge sge; struct ib_rdma_wr wr; } single;
/* for mapping of multiple SGEs: */ struct { struct ib_sge *sges; struct ib_rdma_wr *wrs; } map;
/* for IOVA-based mapping of bvecs into contiguous DMA range: */ struct { struct dma_iova_state state; struct ib_sge sge; struct ib_rdma_wr wr; size_t mapped_len; } iova;
/* for registering multiple WRs: */ struct rdma_rw_reg_ctx { struct ib_sge sge; struct ib_rdma_wr wr; struct ib_reg_wr reg_wr; struct ib_send_wr inv_wr; struct ib_mr *mr; struct sg_table sgt; } *reg; };};
int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct scatterlist *sg, u32 sg_cnt, u32 sg_offset, u64 remote_addr, u32 rkey, enum dma_data_direction dir);void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct scatterlist *sg, u32 sg_cnt, enum dma_data_direction dir);
struct bio_vec;
int rdma_rw_ctx_init_bvec(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, const struct bio_vec *bvecs, u32 nr_bvec, struct bvec_iter iter, u64 remote_addr, u32 rkey, enum dma_data_direction dir);void rdma_rw_ctx_destroy_bvec(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, const struct bio_vec *bvecs, u32 nr_bvec, enum dma_data_direction dir);
int rdma_rw_ctx_signature_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct scatterlist *sg, u32 sg_cnt, struct scatterlist *prot_sg, u32 prot_sg_cnt, struct ib_sig_attrs *sig_attrs, u64 remote_addr, u32 rkey, enum dma_data_direction dir);void rdma_rw_ctx_destroy_signature(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct scatterlist *sg, u32 sg_cnt, struct scatterlist *prot_sg, u32 prot_sg_cnt, enum dma_data_direction dir);
struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr);int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr);
unsigned int rdma_rw_mr_factor(struct ib_device *device, u32 port_num, unsigned int maxpages);unsigned int rdma_rw_max_send_wr(struct ib_device *dev, u32 port_num, unsigned int max_rdma_ctxs, u32 create_flags);void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr);int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr);void rdma_rw_cleanup_mrs(struct ib_qp *qp);
#endif /* _RDMA_RW_H */