/*
* Copyright (c) 2005 Ammasso, Inc. All rights reserved.
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include "c2.h"
#include "c2_wr.h"
#include "c2_vq.h"
#include <rdma/iw_cm.h>
int c2_llp_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
struct c2_dev *c2dev = to_c2dev(cm_id->device);
struct ib_qp *ibqp;
struct c2_qp *qp;
struct c2wr_qp_connect_req *wr; /* variable size needs a malloc. */
struct c2_vq_req *vq_req;
int err;
ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
if (!ibqp)
return -EINVAL;
qp = to_c2qp(ibqp);
/* Associate QP <--> CM_ID */
cm_id->provider_data = qp;
cm_id->add_ref(cm_id);
qp->cm_id = cm_id;
/*
* only support the max private_data length
*/
if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
err = -EINVAL;
goto bail0;
}
/*
* Set the rdma read limits
*/
err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
if (err)
goto bail0;
/*
* Create and send a WR_QP_CONNECT...
*/
wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
if (!wr) {
err = -ENOMEM;
goto bail0;
}
vq_req = vq_req_alloc(c2dev);
if (!vq_req) {
err = -ENOMEM;
goto bail1;
}
c2_wr_set_id(wr, CCWR_QP_CONNECT);
wr->hdr.context = 0;
wr->rnic_handle = c2dev->adapter_handle;
wr->qp_handle = qp->adapter_handle;
wr->remote_addr = cm_id->remote_addr.sin_addr.s_addr;
wr->remote_port = cm_id->remote_addr.sin_port;
/*
* Move any private data from the callers's buf into
* the WR.
*/
if (iw_param->private_data) {
wr->private_data_length =
cpu_to_be32(iw_param->private_data_len);
memcpy(&wr->private_data[0], iw_param->private_data,
iw_param->private_data_len);
} else
wr->private_data_length = 0;
/*
* Send WR to adapter. NOTE: There is no synch reply from
* the adapter.
*/
err = vq_send_wr(c2dev, (union c2wr *) wr);
vq_req_free(c2dev, vq_req);
bail1:
kfree(wr);
bail0:
if (err) {
/*
* If we fail, release reference on QP and
* disassociate QP from CM_ID
*/
cm_id->provider_data = NULL;
qp->cm_id = NULL;
cm_id->rem_ref(cm_id);
}
return err;
}
int c2_llp_service_create(struct iw_cm_id *cm_id, int backlog)
{
struct c2_dev *c2dev;
struct c2wr_ep_listen_create_req wr;
struct c2wr_ep_listen_create_rep *reply;
struct c2_vq_req *vq_req;
int err;
c2dev = to_c2dev(cm_id->device);
if (c2dev == NULL)
return -EINVAL;
/*
* Allocate verbs request.
*/
vq_req = vq_req_alloc(c2dev);
if (!vq_req)
return -ENOMEM;
/*
* Build the WR
*/
c2_wr_set_id(&wr, CCWR_EP_LISTEN_CREATE);
wr.hdr.context = (u64) (unsigned long) vq_req;
wr.rnic_handle = c2dev->adapter_handle;
wr.local_addr = cm_id->local_addr.sin_addr.s_addr;
wr.local_port = cm_id->local_addr.sin_port;
wr.backlog = cpu_to_be32(backlog);
wr.user_context = (u64) (unsigned long) cm_id;
/*
* Reference the request struct. Dereferenced in the int handler.
*/
vq_req_get(c2dev, vq_req);
/*
* Send WR to adapter
*/
err = vq_send_wr(c2dev, (union c2wr *) & wr);
if (err) {
vq_req_put(c2dev, vq_req);
goto bail0;
}
/*
* Wait for reply from adapter
*/
err = vq_wait_for_reply(c2dev, vq_req);
if (err)
goto bail0;
/*
* Process reply
*/
reply =
(struct c2wr_ep_listen_create_rep *) (unsigned long) vq_req->reply_msg;
if (!reply) {
err = -ENOMEM;
goto bail1;
}
if ((err = c2_errno(reply)) != 0)
goto bail1;
/*
* Keep the adapter handle. Used in subsequent destroy
*/
cm_id->provider_data = (void*)(unsigned long) reply->ep_handle;
/*
* free vq stuff
*/
vq_repbuf_free(c2dev, reply);
vq_req_free(c2dev, vq_req);
return 0;
bail1:
vq_repbuf_free(c2dev, reply);
bail0:
vq_req_free(c2dev, vq_req);
return err;
}
int c2_llp_service_destroy(struct iw_cm_id *cm_id)
{
struct c2_dev *c2dev;
struct c2wr_ep_listen_destroy_req wr;
struct c2wr_ep_listen_destroy_rep *reply;
struct c2_vq_req *vq_req;
int err;
c2dev = to_c2dev(cm_id->device);
if (c2dev == NULL)
return -EINVAL;
/*
* Allocate verbs request.
*/
vq_req = vq_req_alloc(c2dev);
if (!vq_req)
return -ENOMEM;
/*
* Build the WR
*/
c2_wr_set_id(&wr, CCWR_EP_LISTEN_DESTROY);
wr.hdr.context = (unsigned long) vq_req;
wr.rnic_handle = c2dev->adapter_handle;
wr.ep_handle = (u32)(unsigned long)cm_id->provider_data;
/*
* reference the request struct. dereferenced in the int handler.
*/
vq_req_get(c2dev, vq_req);
/*
* Send WR to adapter
*/
err = vq_send_wr(c2dev, (union c2wr *) & wr);
if (err) {
vq_req_put(c2dev, vq_req);
goto bail0;
}
/*
* Wait for reply from adapter
*/
err = vq_wait_for_reply(c2dev, vq_req);
if (err)
goto bail0;
/*
* Process reply
*/
reply=(struct c2wr_ep_listen_destroy_rep *)(unsigned long)vq_req->reply_msg;
if (!reply) {
err = -ENOMEM;
goto bail0;
}
if ((err = c2_errno(reply)) != 0)
goto bail1;
bail1:
vq_repbuf_free(c2dev, reply);
bail0:
vq_req_free(c2dev, vq_req);
return err;
}
int c2_llp_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
struct c2_dev *c2dev = to_c2dev(cm_id->device);
struct c2_qp *qp;
struct ib_qp *ibqp;
struct c2wr_cr_accept_req *wr; /* variable length WR */
struct c2_vq_req *vq_req;
struct c2wr_cr_accept_rep *reply; /* VQ Reply msg ptr. */
int err;
ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
if (!ibqp)
return -EINVAL;
qp = to_c2qp(ibqp);
/* Set the RDMA read limits */
err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
if (err)
goto bail0;
/* Allocate verbs request. */
vq_req = vq_req_alloc(c2dev);
if (!vq_req) {
err = -ENOMEM;
goto bail0;
}
vq_req->qp = qp;
vq_req->cm_id = cm_id;
vq_req->event = IW_CM_EVENT_ESTABLISHED;
wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
if (!wr) {
err = -ENOMEM;
goto bail1;
}
/* Build the WR */
c2_wr_set_id(wr, CCWR_CR_ACCEPT);
wr->hdr.context = (unsigned long) vq_req;
wr->rnic_handle = c2dev->adapter_handle;
wr->ep_handle = (u32) (unsigned long) cm_id->provider_data;
wr->qp_handle = qp->adapter_handle;
/* Replace the cr_handle with the QP after accept */
cm_id->provider_data = qp;
cm_id->add_ref(cm_id);
qp->cm_id = cm_id;
cm_id->provider_data = qp;
/* Validate private_data length */
if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
err = -EINVAL;
goto bail1;
}
if (iw_param->private_data) {
wr->private_data_length = cpu_to_be32(iw_param->private_data_len);
memcpy(&wr->private_data[0],
iw_param->private_data, iw_param->private_data_len);
} else
wr->private_data_length = 0;
/* Reference the request struct. Dereferenced in the int handler. */
vq_req_get(c2dev, vq_req);
/* Send WR to adapter */
err = vq_send_wr(c2dev, (union c2wr *) wr);
if (err) {
vq_req_put(c2dev, vq_req);
goto bail1;
}
/* Wait for reply from adapter */
err = vq_wait_for_reply(c2dev, vq_req);
if (err)
goto bail1;
/* Check that reply is present */
reply = (struct c2wr_cr_accept_rep *) (unsigned long) vq_req->reply_msg;
if (!reply) {
err = -ENOMEM;
goto bail1;
}
err = c2_errno(reply);
vq_repbuf_free(c2dev, reply);
if (!err)
c2_set_qp_state(qp, C2_QP_STATE_RTS);
bail1:
kfree(wr);
vq_req_free(c2dev, vq_req);
bail0:
if (err) {
/*
* If we fail, release reference on QP and
* disassociate QP from CM_ID
*/
cm_id->provider_data = NULL;
qp->cm_id = NULL;
cm_id->rem_ref(cm_id);
}
return err;
}
int c2_llp_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
struct c2_dev *c2dev;
struct c2wr_cr_reject_req wr;
struct c2_vq_req *vq_req;
struct c2wr_cr_reject_rep *reply;
int err;
c2dev = to_c2dev(cm_id->device);
/*
* Allocate verbs request.
*/
vq_req = vq_req_alloc(c2dev);
if (!vq_req)
return -ENOMEM;
/*
* Build the WR
*/
c2_wr_set_id(&wr, CCWR_CR_REJECT);
wr.hdr.context = (unsigned long) vq_req;
wr.rnic_handle = c2dev->adapter_handle;
wr.ep_handle = (u32) (unsigned long) cm_id->provider_data;
/*
* reference the request struct. dereferenced in the int handler.
*/
vq_req_get(c2dev, vq_req);
/*
* Send WR to adapter
*/
err = vq_send_wr(c2dev, (union c2wr *) & wr);
if (err) {
vq_req_put(c2dev, vq_req);
goto bail0;
}
/*
* Wait for reply from adapter
*/
err = vq_wait_for_reply(c2dev, vq_req);
if (err)
goto bail0;
/*
* Process reply
*/
reply = (struct c2wr_cr_reject_rep *) (unsigned long)
vq_req->reply_msg;
if (!reply) {
err = -ENOMEM;
goto bail0;
}
err = c2_errno(reply);
/*
* free vq stuff
*/
vq_repbuf_free(c2dev, reply);
bail0:
vq_req_free(c2dev, vq_req);
return err;
}
