projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| a060b562 CH |
1 | /* |
| 2 | * Copyright (c) 2016 HGST, a Western Digital Company. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms and conditions of the GNU General Public License, | |
| 6 | * version 2, as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 11 | * more details. | |
| 12 | */ | |
| 13 | #ifndef _RDMA_RW_H | |
| 14 | #define _RDMA_RW_H | |
| 15 | ||
| 16 | #include <linux/dma-mapping.h> | |
| 17 | #include <linux/scatterlist.h> | |
| 18 | #include <rdma/ib_verbs.h> | |
| 19 | #include <rdma/rdma_cm.h> | |
| 20 | #include <rdma/mr_pool.h> | |
| 21 | ||
| 22 | struct rdma_rw_ctx { | |
| 23 | /* number of RDMA READ/WRITE WRs (not counting MR WRs) */ | |
| 24 | u32 nr_ops; | |
| 25 | ||
| 26 | /* tag for the union below: */ | |
| 27 | u8 type; | |
| 28 | ||
| 29 | union { | |
| 30 | /* for mapping a single SGE: */ | |
| 31 | struct { | |
| 32 | struct ib_sge sge; | |
| 33 | struct ib_rdma_wr wr; | |
| 34 | } single; | |
| 35 | ||
| 36 | /* for mapping of multiple SGEs: */ | |
| 37 | struct { | |
| 38 | struct ib_sge *sges; | |
| 39 | struct ib_rdma_wr *wrs; | |
| 40 | } map; | |
| 41 | ||
| 42 | /* for registering multiple WRs: */ | |
| 43 | struct rdma_rw_reg_ctx { | |
| 44 | struct ib_sge sge; | |
| 45 | struct ib_rdma_wr wr; | |
| 46 | struct ib_reg_wr reg_wr; | |
| 47 | struct ib_send_wr inv_wr; | |
| 48 | struct ib_mr *mr; | |
| 49 | } *reg; | |
| 50 | }; | |
| 51 | }; | |
| 52 | ||
| 53 | int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num, | |
| 54 | struct scatterlist *sg, u32 sg_cnt, u32 sg_offset, | |
| 55 | u64 remote_addr, u32 rkey, enum dma_data_direction dir); | |
| 56 | void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num, | |
| 57 | struct scatterlist *sg, u32 sg_cnt, | |
| 58 | enum dma_data_direction dir); | |
| 59 | ||
| 60 | struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp, | |
| 61 | u8 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr); | |
| 62 | int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num, | |
| 63 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr); | |
| 64 | ||
| 65 | void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr); | |
| 66 | int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr); | |
| 67 | void rdma_rw_cleanup_mrs(struct ib_qp *qp); | |
| 68 | ||
| 69 | #endif /* _RDMA_RW_H */ |