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2025cf9e | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
a060b562 CH |
2 | /* |
3 | * Copyright (c) 2016 HGST, a Western Digital Company. | |
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4 | */ |
5 | #ifndef _RDMA_RW_H | |
6 | #define _RDMA_RW_H | |
7 | ||
8 | #include <linux/dma-mapping.h> | |
9 | #include <linux/scatterlist.h> | |
10 | #include <rdma/ib_verbs.h> | |
11 | #include <rdma/rdma_cm.h> | |
12 | #include <rdma/mr_pool.h> | |
13 | ||
14 | struct rdma_rw_ctx { | |
15 | /* number of RDMA READ/WRITE WRs (not counting MR WRs) */ | |
16 | u32 nr_ops; | |
17 | ||
18 | /* tag for the union below: */ | |
19 | u8 type; | |
20 | ||
21 | union { | |
22 | /* for mapping a single SGE: */ | |
23 | struct { | |
24 | struct ib_sge sge; | |
25 | struct ib_rdma_wr wr; | |
26 | } single; | |
27 | ||
28 | /* for mapping of multiple SGEs: */ | |
29 | struct { | |
30 | struct ib_sge *sges; | |
31 | struct ib_rdma_wr *wrs; | |
32 | } map; | |
33 | ||
34 | /* for registering multiple WRs: */ | |
35 | struct rdma_rw_reg_ctx { | |
36 | struct ib_sge sge; | |
37 | struct ib_rdma_wr wr; | |
38 | struct ib_reg_wr reg_wr; | |
39 | struct ib_send_wr inv_wr; | |
40 | struct ib_mr *mr; | |
41 | } *reg; | |
42 | }; | |
43 | }; | |
44 | ||
1fb7f897 | 45 | int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, |
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46 | struct scatterlist *sg, u32 sg_cnt, u32 sg_offset, |
47 | u64 remote_addr, u32 rkey, enum dma_data_direction dir); | |
1fb7f897 MB |
48 | void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp, |
49 | u32 port_num, struct scatterlist *sg, u32 sg_cnt, | |
50 | enum dma_data_direction dir); | |
a060b562 | 51 | |
0e353e34 | 52 | int rdma_rw_ctx_signature_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, |
1fb7f897 | 53 | u32 port_num, struct scatterlist *sg, u32 sg_cnt, |
0e353e34 CH |
54 | struct scatterlist *prot_sg, u32 prot_sg_cnt, |
55 | struct ib_sig_attrs *sig_attrs, u64 remote_addr, u32 rkey, | |
56 | enum dma_data_direction dir); | |
57 | void rdma_rw_ctx_destroy_signature(struct rdma_rw_ctx *ctx, struct ib_qp *qp, | |
1fb7f897 | 58 | u32 port_num, struct scatterlist *sg, u32 sg_cnt, |
0e353e34 CH |
59 | struct scatterlist *prot_sg, u32 prot_sg_cnt, |
60 | enum dma_data_direction dir); | |
61 | ||
a060b562 | 62 | struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp, |
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63 | u32 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr); |
64 | int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num, | |
a060b562 CH |
65 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr); |
66 | ||
1fb7f897 | 67 | unsigned int rdma_rw_mr_factor(struct ib_device *device, u32 port_num, |
00628182 | 68 | unsigned int maxpages); |
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69 | void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr); |
70 | int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr); | |
71 | void rdma_rw_cleanup_mrs(struct ib_qp *qp); | |
72 | ||
73 | #endif /* _RDMA_RW_H */ |