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rdma/siw: application interface
Broken up commit to add the Soft iWarp RDMA driver. Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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4 changed files with 2037 additions and 0 deletions
1760
drivers/infiniband/sw/siw/siw_verbs.c
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1760
drivers/infiniband/sw/siw/siw_verbs.c
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91
drivers/infiniband/sw/siw/siw_verbs.h
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91
drivers/infiniband/sw/siw/siw_verbs.h
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@ -0,0 +1,91 @@
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/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
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/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
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/* Copyright (c) 2008-2019, IBM Corporation */
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#ifndef _SIW_VERBS_H
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#define _SIW_VERBS_H
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#include <linux/errno.h>
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#include <rdma/iw_cm.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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#include "siw.h"
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#include "siw_cm.h"
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/*
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* siw_copy_sgl()
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*
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* Copy SGL from RDMA core representation to local
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* representation.
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*/
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static inline void siw_copy_sgl(struct ib_sge *sge, struct siw_sge *siw_sge,
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int num_sge)
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{
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while (num_sge--) {
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siw_sge->laddr = sge->addr;
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siw_sge->length = sge->length;
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siw_sge->lkey = sge->lkey;
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siw_sge++;
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sge++;
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}
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}
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int siw_alloc_ucontext(struct ib_ucontext *base_ctx, struct ib_udata *udata);
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void siw_dealloc_ucontext(struct ib_ucontext *base_ctx);
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int siw_query_port(struct ib_device *base_dev, u8 port,
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struct ib_port_attr *attr);
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int siw_get_port_immutable(struct ib_device *base_dev, u8 port,
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struct ib_port_immutable *port_immutable);
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int siw_query_device(struct ib_device *base_dev, struct ib_device_attr *attr,
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struct ib_udata *udata);
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int siw_create_cq(struct ib_cq *base_cq, const struct ib_cq_init_attr *attr,
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struct ib_udata *udata);
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int siw_query_port(struct ib_device *base_dev, u8 port,
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struct ib_port_attr *attr);
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int siw_query_pkey(struct ib_device *base_dev, u8 port, u16 idx, u16 *pkey);
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int siw_query_gid(struct ib_device *base_dev, u8 port, int idx,
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union ib_gid *gid);
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int siw_alloc_pd(struct ib_pd *base_pd, struct ib_udata *udata);
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void siw_dealloc_pd(struct ib_pd *base_pd, struct ib_udata *udata);
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struct ib_qp *siw_create_qp(struct ib_pd *base_pd,
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struct ib_qp_init_attr *attr,
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struct ib_udata *udata);
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int siw_query_qp(struct ib_qp *base_qp, struct ib_qp_attr *qp_attr,
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int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
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int siw_verbs_modify_qp(struct ib_qp *base_qp, struct ib_qp_attr *attr,
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int attr_mask, struct ib_udata *udata);
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int siw_destroy_qp(struct ib_qp *base_qp, struct ib_udata *udata);
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int siw_post_send(struct ib_qp *base_qp, const struct ib_send_wr *wr,
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const struct ib_send_wr **bad_wr);
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int siw_post_receive(struct ib_qp *base_qp, const struct ib_recv_wr *wr,
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const struct ib_recv_wr **bad_wr);
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void siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata);
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int siw_poll_cq(struct ib_cq *base_cq, int num_entries, struct ib_wc *wc);
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int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags);
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struct ib_mr *siw_reg_user_mr(struct ib_pd *base_pd, u64 start, u64 len,
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u64 rnic_va, int rights, struct ib_udata *udata);
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struct ib_mr *siw_alloc_mr(struct ib_pd *base_pd, enum ib_mr_type mr_type,
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u32 max_sge, struct ib_udata *udata);
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struct ib_mr *siw_get_dma_mr(struct ib_pd *base_pd, int rights);
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int siw_map_mr_sg(struct ib_mr *base_mr, struct scatterlist *sl, int num_sle,
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unsigned int *sg_off);
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int siw_dereg_mr(struct ib_mr *base_mr, struct ib_udata *udata);
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int siw_create_srq(struct ib_srq *base_srq, struct ib_srq_init_attr *attr,
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struct ib_udata *udata);
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int siw_modify_srq(struct ib_srq *base_srq, struct ib_srq_attr *attr,
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enum ib_srq_attr_mask mask, struct ib_udata *udata);
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int siw_query_srq(struct ib_srq *base_srq, struct ib_srq_attr *attr);
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void siw_destroy_srq(struct ib_srq *base_srq, struct ib_udata *udata);
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int siw_post_srq_recv(struct ib_srq *base_srq, const struct ib_recv_wr *wr,
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const struct ib_recv_wr **bad_wr);
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int siw_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma);
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void siw_qp_event(struct siw_qp *qp, enum ib_event_type type);
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void siw_cq_event(struct siw_cq *cq, enum ib_event_type type);
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void siw_srq_event(struct siw_srq *srq, enum ib_event_type type);
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void siw_port_event(struct siw_device *dev, u8 port, enum ib_event_type type);
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#endif
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@ -103,6 +103,7 @@ enum rdma_driver_id {
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RDMA_DRIVER_HFI1,
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RDMA_DRIVER_QIB,
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RDMA_DRIVER_EFA,
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RDMA_DRIVER_SIW,
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};
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#endif
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185
include/uapi/rdma/siw-abi.h
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include/uapi/rdma/siw-abi.h
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/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
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/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
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/* Copyright (c) 2008-2019, IBM Corporation */
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#ifndef _SIW_USER_H
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#define _SIW_USER_H
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#include <linux/types.h>
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#define SIW_NODE_DESC_COMMON "Software iWARP stack"
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#define SIW_ABI_VERSION 1
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#define SIW_MAX_SGE 6
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#define SIW_UOBJ_MAX_KEY 0x08FFFF
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#define SIW_INVAL_UOBJ_KEY (SIW_UOBJ_MAX_KEY + 1)
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struct siw_uresp_create_cq {
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__u32 cq_id;
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__u32 num_cqe;
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__aligned_u64 cq_key;
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};
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struct siw_uresp_create_qp {
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__u32 qp_id;
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__u32 num_sqe;
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__u32 num_rqe;
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__u32 pad;
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__aligned_u64 sq_key;
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__aligned_u64 rq_key;
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};
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struct siw_ureq_reg_mr {
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__u8 stag_key;
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__u8 reserved[3];
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__u32 pad;
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};
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struct siw_uresp_reg_mr {
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__u32 stag;
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__u32 pad;
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};
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struct siw_uresp_create_srq {
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__u32 num_rqe;
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__u32 pad;
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__aligned_u64 srq_key;
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};
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struct siw_uresp_alloc_ctx {
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__u32 dev_id;
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__u32 pad;
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};
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enum siw_opcode {
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SIW_OP_WRITE,
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SIW_OP_READ,
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SIW_OP_READ_LOCAL_INV,
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SIW_OP_SEND,
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SIW_OP_SEND_WITH_IMM,
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SIW_OP_SEND_REMOTE_INV,
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/* Unsupported */
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SIW_OP_FETCH_AND_ADD,
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SIW_OP_COMP_AND_SWAP,
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SIW_OP_RECEIVE,
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/* provider internal SQE */
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SIW_OP_READ_RESPONSE,
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/*
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* below opcodes valid for
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* in-kernel clients only
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*/
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SIW_OP_INVAL_STAG,
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SIW_OP_REG_MR,
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SIW_NUM_OPCODES
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};
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/* Keep it same as ibv_sge to allow for memcpy */
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struct siw_sge {
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__aligned_u64 laddr;
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__u32 length;
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__u32 lkey;
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};
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/*
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* Inline data are kept within the work request itself occupying
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* the space of sge[1] .. sge[n]. Therefore, inline data cannot be
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* supported if SIW_MAX_SGE is below 2 elements.
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*/
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#define SIW_MAX_INLINE (sizeof(struct siw_sge) * (SIW_MAX_SGE - 1))
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#if SIW_MAX_SGE < 2
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#error "SIW_MAX_SGE must be at least 2"
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#endif
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enum siw_wqe_flags {
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SIW_WQE_VALID = 1,
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SIW_WQE_INLINE = (1 << 1),
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SIW_WQE_SIGNALLED = (1 << 2),
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SIW_WQE_SOLICITED = (1 << 3),
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SIW_WQE_READ_FENCE = (1 << 4),
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SIW_WQE_REM_INVAL = (1 << 5),
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SIW_WQE_COMPLETED = (1 << 6)
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};
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/* Send Queue Element */
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struct siw_sqe {
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__aligned_u64 id;
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__u16 flags;
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__u8 num_sge;
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/* Contains enum siw_opcode values */
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__u8 opcode;
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__u32 rkey;
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union {
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__aligned_u64 raddr;
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__aligned_u64 base_mr;
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};
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union {
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struct siw_sge sge[SIW_MAX_SGE];
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__aligned_u64 access;
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};
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};
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/* Receive Queue Element */
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struct siw_rqe {
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__aligned_u64 id;
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__u16 flags;
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__u8 num_sge;
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/*
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* only used by kernel driver,
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* ignored if set by user
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*/
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__u8 opcode;
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__u32 unused;
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struct siw_sge sge[SIW_MAX_SGE];
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};
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enum siw_notify_flags {
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SIW_NOTIFY_NOT = (0),
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SIW_NOTIFY_SOLICITED = (1 << 0),
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SIW_NOTIFY_NEXT_COMPLETION = (1 << 1),
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SIW_NOTIFY_MISSED_EVENTS = (1 << 2),
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SIW_NOTIFY_ALL = SIW_NOTIFY_SOLICITED | SIW_NOTIFY_NEXT_COMPLETION |
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SIW_NOTIFY_MISSED_EVENTS
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};
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enum siw_wc_status {
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SIW_WC_SUCCESS,
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SIW_WC_LOC_LEN_ERR,
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SIW_WC_LOC_PROT_ERR,
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SIW_WC_LOC_QP_OP_ERR,
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SIW_WC_WR_FLUSH_ERR,
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SIW_WC_BAD_RESP_ERR,
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SIW_WC_LOC_ACCESS_ERR,
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SIW_WC_REM_ACCESS_ERR,
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SIW_WC_REM_INV_REQ_ERR,
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SIW_WC_GENERAL_ERR,
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SIW_NUM_WC_STATUS
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};
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struct siw_cqe {
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__aligned_u64 id;
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__u8 flags;
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__u8 opcode;
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__u16 status;
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__u32 bytes;
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union {
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__aligned_u64 imm_data;
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__u32 inval_stag;
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};
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/* QP number or QP pointer */
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union {
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struct ib_qp *base_qp;
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__aligned_u64 qp_id;
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};
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};
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/*
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* Shared structure between user and kernel
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* to control CQ arming.
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*/
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struct siw_cq_ctrl {
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__aligned_u64 notify;
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};
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#endif
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