b196d4f1d6
With the change made in commit 68b89aee71 ("Utilize ibv_reg_mr_iova for
memory registration") the MR emulation is no longer needed in order to
translate the guest addresses into host addresses.
With that, the next obvious step is to skip entirely the processing in
data-path.
To accomplish this, return the backend's lkey to driver so we will not
need to do the emulated mr_id to backend mr_id translation in data-path.
The function build_host_sge_array is still called in data-path but only
for backward computability with statistics collection.
While there, as a cosmetic change to make the code cleaner - make one
copy of the function rdma_backend_create_mr and leave the redundant
guest_start argument in the legacy code.
Signed-off-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Message-Id: <20200320143429.9490-3-yuval.shaia.ml@gmail.com>
Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
130 lines
5.5 KiB
C
130 lines
5.5 KiB
C
/*
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* RDMA device: Definitions of Backend Device functions
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*
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* Copyright (C) 2018 Oracle
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* Copyright (C) 2018 Red Hat Inc
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*
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* Authors:
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* Yuval Shaia <yuval.shaia@oracle.com>
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* Marcel Apfelbaum <marcel@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef RDMA_BACKEND_H
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#define RDMA_BACKEND_H
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#include "qapi/error.h"
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#include "chardev/char-fe.h"
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#include "rdma_rm_defs.h"
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#include "rdma_backend_defs.h"
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/* Vendor Errors */
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#define VENDOR_ERR_FAIL_BACKEND 0x201
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#define VENDOR_ERR_TOO_MANY_SGES 0x202
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#define VENDOR_ERR_NOMEM 0x203
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#define VENDOR_ERR_QP0 0x204
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#define VENDOR_ERR_INV_NUM_SGE 0x205
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#define VENDOR_ERR_MAD_SEND 0x206
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#define VENDOR_ERR_INVLKEY 0x207
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#define VENDOR_ERR_MR_SMALL 0x208
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#define VENDOR_ERR_INV_MAD_BUFF 0x209
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#define VENDOR_ERR_INV_GID_IDX 0x210
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/* Add definition for QP0 and QP1 as there is no userspace enums for them */
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enum ibv_special_qp_type {
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IBV_QPT_SMI = 0,
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IBV_QPT_GSI = 1,
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};
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static inline uint32_t rdma_backend_qpn(const RdmaBackendQP *qp)
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{
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return qp->ibqp ? qp->ibqp->qp_num : 1;
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}
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static inline uint32_t rdma_backend_mr_lkey(const RdmaBackendMR *mr)
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{
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return mr->ibmr ? mr->ibmr->lkey : 0;
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}
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static inline uint32_t rdma_backend_mr_rkey(const RdmaBackendMR *mr)
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{
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return mr->ibmr ? mr->ibmr->rkey : 0;
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}
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int rdma_backend_init(RdmaBackendDev *backend_dev, PCIDevice *pdev,
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RdmaDeviceResources *rdma_dev_res,
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const char *backend_device_name, uint8_t port_num,
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struct ibv_device_attr *dev_attr,
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CharBackend *mad_chr_be);
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void rdma_backend_fini(RdmaBackendDev *backend_dev);
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int rdma_backend_add_gid(RdmaBackendDev *backend_dev, const char *ifname,
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union ibv_gid *gid);
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int rdma_backend_del_gid(RdmaBackendDev *backend_dev, const char *ifname,
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union ibv_gid *gid);
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int rdma_backend_get_gid_index(RdmaBackendDev *backend_dev,
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union ibv_gid *gid);
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void rdma_backend_start(RdmaBackendDev *backend_dev);
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void rdma_backend_stop(RdmaBackendDev *backend_dev);
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void rdma_backend_register_comp_handler(void (*handler)(void *ctx,
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struct ibv_wc *wc));
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void rdma_backend_unregister_comp_handler(void);
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int rdma_backend_query_port(RdmaBackendDev *backend_dev,
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struct ibv_port_attr *port_attr);
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int rdma_backend_create_pd(RdmaBackendDev *backend_dev, RdmaBackendPD *pd);
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void rdma_backend_destroy_pd(RdmaBackendPD *pd);
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int rdma_backend_create_mr(RdmaBackendMR *mr, RdmaBackendPD *pd, void *addr,
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size_t length, uint64_t guest_start, int access);
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void rdma_backend_destroy_mr(RdmaBackendMR *mr);
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int rdma_backend_create_cq(RdmaBackendDev *backend_dev, RdmaBackendCQ *cq,
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int cqe);
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void rdma_backend_destroy_cq(RdmaBackendCQ *cq);
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void rdma_backend_poll_cq(RdmaDeviceResources *rdma_dev_res, RdmaBackendCQ *cq);
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int rdma_backend_create_qp(RdmaBackendQP *qp, uint8_t qp_type,
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RdmaBackendPD *pd, RdmaBackendCQ *scq,
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RdmaBackendCQ *rcq, RdmaBackendSRQ *srq,
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uint32_t max_send_wr, uint32_t max_recv_wr,
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uint32_t max_send_sge, uint32_t max_recv_sge);
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int rdma_backend_qp_state_init(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
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uint8_t qp_type, uint32_t qkey);
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int rdma_backend_qp_state_rtr(RdmaBackendDev *backend_dev, RdmaBackendQP *qp,
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uint8_t qp_type, uint8_t sgid_idx,
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union ibv_gid *dgid, uint32_t dqpn,
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uint32_t rq_psn, uint32_t qkey, bool use_qkey);
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int rdma_backend_qp_state_rts(RdmaBackendQP *qp, uint8_t qp_type,
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uint32_t sq_psn, uint32_t qkey, bool use_qkey);
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int rdma_backend_query_qp(RdmaBackendQP *qp, struct ibv_qp_attr *attr,
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int attr_mask, struct ibv_qp_init_attr *init_attr);
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void rdma_backend_destroy_qp(RdmaBackendQP *qp, RdmaDeviceResources *dev_res);
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void rdma_backend_post_send(RdmaBackendDev *backend_dev,
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RdmaBackendQP *qp, uint8_t qp_type,
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struct ibv_sge *sge, uint32_t num_sge,
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uint8_t sgid_idx, union ibv_gid *sgid,
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union ibv_gid *dgid, uint32_t dqpn, uint32_t dqkey,
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void *ctx);
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void rdma_backend_post_recv(RdmaBackendDev *backend_dev,
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RdmaBackendQP *qp, uint8_t qp_type,
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struct ibv_sge *sge, uint32_t num_sge, void *ctx);
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int rdma_backend_create_srq(RdmaBackendSRQ *srq, RdmaBackendPD *pd,
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uint32_t max_wr, uint32_t max_sge,
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uint32_t srq_limit);
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int rdma_backend_query_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr);
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int rdma_backend_modify_srq(RdmaBackendSRQ *srq, struct ibv_srq_attr *srq_attr,
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int srq_attr_mask);
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void rdma_backend_destroy_srq(RdmaBackendSRQ *srq,
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RdmaDeviceResources *dev_res);
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void rdma_backend_post_srq_recv(RdmaBackendDev *backend_dev,
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RdmaBackendSRQ *srq, struct ibv_sge *sge,
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uint32_t num_sge, void *ctx);
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#endif
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