/*
 * RDMA device: Definitions of Resource Manager functions
 *
 * Copyright (C) 2018 Oracle
 * Copyright (C) 2018 Red Hat Inc
 *
 * Authors:
 *     Yuval Shaia <yuval.shaia@oracle.com>
 *     Marcel Apfelbaum <marcel@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */

#ifndef RDMA_RM_H
#define RDMA_RM_H

#include "qapi/error.h"
#include "rdma_backend_defs.h"
#include "rdma_rm_defs.h"

int rdma_rm_init(RdmaDeviceResources *dev_res,
                 struct ibv_device_attr *dev_attr);
void rdma_rm_fini(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                  const char *ifname);

int rdma_rm_alloc_pd(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                     uint32_t *pd_handle, uint32_t ctx_handle);
RdmaRmPD *rdma_rm_get_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle);
void rdma_rm_dealloc_pd(RdmaDeviceResources *dev_res, uint32_t pd_handle);

int rdma_rm_alloc_mr(RdmaDeviceResources *dev_res, uint32_t pd_handle,
                     uint64_t guest_start, uint64_t guest_length,
                     void *host_virt, int access_flags, uint32_t *mr_handle,
                     uint32_t *lkey, uint32_t *rkey);
RdmaRmMR *rdma_rm_get_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle);
void rdma_rm_dealloc_mr(RdmaDeviceResources *dev_res, uint32_t mr_handle);

int rdma_rm_alloc_uc(RdmaDeviceResources *dev_res, uint32_t pfn,
                     uint32_t *uc_handle);
RdmaRmUC *rdma_rm_get_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle);
void rdma_rm_dealloc_uc(RdmaDeviceResources *dev_res, uint32_t uc_handle);

int rdma_rm_alloc_cq(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                     uint32_t cqe, uint32_t *cq_handle, void *opaque);
RdmaRmCQ *rdma_rm_get_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle);
void rdma_rm_req_notify_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle,
                           bool notify);
void rdma_rm_dealloc_cq(RdmaDeviceResources *dev_res, uint32_t cq_handle);

int rdma_rm_alloc_qp(RdmaDeviceResources *dev_res, uint32_t pd_handle,
                     uint8_t qp_type, uint32_t max_send_wr,
                     uint32_t max_send_sge, uint32_t send_cq_handle,
                     uint32_t max_recv_wr, uint32_t max_recv_sge,
                     uint32_t recv_cq_handle, void *opaque, uint32_t *qpn,
                     uint8_t is_srq, uint32_t srq_handle);
RdmaRmQP *rdma_rm_get_qp(RdmaDeviceResources *dev_res, uint32_t qpn);
int rdma_rm_modify_qp(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                      uint32_t qp_handle, uint32_t attr_mask, uint8_t sgid_idx,
                      union ibv_gid *dgid, uint32_t dqpn,
                      enum ibv_qp_state qp_state, uint32_t qkey,
                      uint32_t rq_psn, uint32_t sq_psn);
int rdma_rm_query_qp(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                     uint32_t qp_handle, struct ibv_qp_attr *attr,
                     int attr_mask, struct ibv_qp_init_attr *init_attr);
void rdma_rm_dealloc_qp(RdmaDeviceResources *dev_res, uint32_t qp_handle);

RdmaRmSRQ *rdma_rm_get_srq(RdmaDeviceResources *dev_res, uint32_t srq_handle);
int rdma_rm_alloc_srq(RdmaDeviceResources *dev_res, uint32_t pd_handle,
                      uint32_t max_wr, uint32_t max_sge, uint32_t srq_limit,
                      uint32_t *srq_handle, void *opaque);
int rdma_rm_query_srq(RdmaDeviceResources *dev_res, uint32_t srq_handle,
                      struct ibv_srq_attr *srq_attr);
int rdma_rm_modify_srq(RdmaDeviceResources *dev_res, uint32_t srq_handle,
                       struct ibv_srq_attr *srq_attr, int srq_attr_mask);
void rdma_rm_dealloc_srq(RdmaDeviceResources *dev_res, uint32_t srq_handle);

int rdma_rm_alloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t *cqe_ctx_id,
                          void *ctx);
void *rdma_rm_get_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id);
void rdma_rm_dealloc_cqe_ctx(RdmaDeviceResources *dev_res, uint32_t cqe_ctx_id);

int rdma_rm_add_gid(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                    const char *ifname, union ibv_gid *gid, int gid_idx);
int rdma_rm_del_gid(RdmaDeviceResources *dev_res, RdmaBackendDev *backend_dev,
                    const char *ifname, int gid_idx);
int rdma_rm_get_backend_gid_index(RdmaDeviceResources *dev_res,
                                  RdmaBackendDev *backend_dev, int sgid_idx);
static inline union ibv_gid *rdma_rm_get_gid(RdmaDeviceResources *dev_res,
                                             int sgid_idx)
{
    return &dev_res->port.gid_tbl[sgid_idx].gid;
}
void rdma_format_device_counters(RdmaDeviceResources *dev_res, GString *buf);

#endif
