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/*
* Unix SMB/CIFS implementation.
* Wrap Infiniband calls.
*
* Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006
*
* Major code contributions by Peter Somogyi <psomogyi@gamax.hu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
struct ibw_opts {
uint32_t max_send_wr;
uint32_t max_recv_wr;
uint32_t recv_bufsize;
uint32_t recv_threshold;
};
struct ibw_wr {
char *buf; /* initialized in ibw_init_memory once per connection */
int wr_id; /* position in wr_index list; also used as wr id */
char *buf_large; /* allocated specially for "large" message */
struct ibv_mr *mr_large;
int ref_cnt; /* reference count for ibw_wc_send to know when to release */
char *queued_msg; /* set at ibw_send - can be different than above */
int queued_ref_cnt; /* instead of adding the same to the queue again */
uint32_t queued_rlen; /* last wins when queued_ref_cnt>0; or simple msg size */
struct ibw_wr *next, *prev; /* in wr_list_avail or wr_list_used */
/* or extra_sent or extra_avail */
struct ibw_wr *qnext, *qprev; /* in queue */
};
struct ibw_ctx_priv {
struct tevent_context *ectx;
struct ibw_opts opts;
struct rdma_cm_id *cm_id; /* server cm id */
struct rdma_event_channel *cm_channel;
struct tevent_fd *cm_channel_event;
ibw_connstate_fn_t connstate_func; /* see ibw_init */
ibw_receive_fn_t receive_func; /* see ibw_init */
long pagesize; /* sysconf result for memalign */
};
struct ibw_part {
char *buf; /* talloced memory buffer */
uint32_t bufsize; /* allocated size of buf - always grows */
uint32_t len; /* message part length */
uint32_t to_read; /* 4 or *((uint32_t)buf) if len>=sizeof(uint32_t) */
};
struct ibw_conn_priv {
struct ibv_comp_channel *verbs_channel;
struct tevent_fd *verbs_channel_event;
struct rdma_cm_id *cm_id; /* client's cm id */
struct ibv_pd *pd;
int is_accepted;
struct ibv_cq *cq; /* qp is in cm_id */
char *buf_send; /* max_send_wr * avg_send_size */
struct ibv_mr *mr_send;
struct ibw_wr *wr_list_avail;
struct ibw_wr *wr_list_used;
struct ibw_wr **wr_index; /* array[0..(qsize-1)] of (ibw_wr *) */
int wr_sent; /* # of send wrs in the CQ */
struct ibw_wr *extra_sent;
struct ibw_wr *extra_avail;
int extra_max; /* max wr_id in the queue */
struct ibw_wr *queue;
/* buf_recv is a ring buffer */
char *buf_recv; /* max_recv_wr * avg_recv_size */
struct ibv_mr *mr_recv;
int recv_index; /* index of the next recv buffer when refilling */
struct ibw_part part;
};
/* remove an element from a list - element doesn't have to be in list. */
#define DLIST_REMOVE2(list, p, prev, next) \
do { \
if ((p) == (list)) { \
(list) = (p)->next; \
if (list) (list)->prev = NULL; \
} else { \
if ((p)->prev) (p)->prev->next = (p)->next; \
if ((p)->next) (p)->next->prev = (p)->prev; \
} \
if ((p) != (list)) (p)->next = (p)->prev = NULL; \
} while (0)
/* hook into the end of the list - needs a tmp pointer */
#define DLIST_ADD_END2(list, p, type, prev, next) \
do { \
if (!(list)) { \
(list) = (p); \
(p)->next = (p)->prev = NULL; \
} else { \
type tmp; \
for (tmp = (list); tmp->next; tmp = tmp->next) ; \
tmp->next = (p); \
(p)->next = NULL; \
(p)->prev = tmp; \
} \
} while (0)
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