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/*
* This file is part of the Chelsio T6 Ethernet driver for Linux.
*
* Copyright (c) 2017-2018 Chelsio Communications, 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 "cxgb4.h"
#include "t4_msg.h"
#include "srq.h"
struct srq_data *t4_init_srq(int srq_size)
{
struct srq_data *s;
s = kvzalloc(sizeof(*s), GFP_KERNEL);
if (!s)
return NULL;
s->srq_size = srq_size;
init_completion(&s->comp);
mutex_init(&s->lock);
return s;
}
/* cxgb4_get_srq_entry: read the SRQ table entry
* @dev: Pointer to the net_device
* @idx: Index to the srq
* @entryp: pointer to the srq entry
*
* Sends CPL_SRQ_TABLE_REQ message for the given index.
* Contents will be returned in CPL_SRQ_TABLE_RPL message.
*
* Returns zero if the read is successful, else a error
* number will be returned. Caller should not use the srq
* entry if the return value is non-zero.
*
*
*/
int cxgb4_get_srq_entry(struct net_device *dev,
int srq_idx, struct srq_entry *entryp)
{
struct cpl_srq_table_req *req;
struct adapter *adap;
struct sk_buff *skb;
struct srq_data *s;
int rc = -ENODEV;
adap = netdev2adap(dev);
s = adap->srq;
if (!(adap->flags & CXGB4_FULL_INIT_DONE) || !s)
goto out;
skb = alloc_skb(sizeof(*req), GFP_KERNEL);
if (!skb)
return -ENOMEM;
req = (struct cpl_srq_table_req *)
__skb_put_zero(skb, sizeof(*req));
INIT_TP_WR(req, 0);
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SRQ_TABLE_REQ,
TID_TID_V(srq_idx) |
TID_QID_V(adap->sge.fw_evtq.abs_id)));
req->idx = srq_idx;
mutex_lock(&s->lock);
s->entryp = entryp;
t4_mgmt_tx(adap, skb);
rc = wait_for_completion_timeout(&s->comp, SRQ_WAIT_TO);
if (rc)
rc = 0;
else /* !rc means we timed out */
rc = -ETIMEDOUT;
WARN_ON_ONCE(entryp->idx != srq_idx);
mutex_unlock(&s->lock);
out:
return rc;
}
EXPORT_SYMBOL(cxgb4_get_srq_entry);
void do_srq_table_rpl(struct adapter *adap,
const struct cpl_srq_table_rpl *rpl)
{
unsigned int idx = TID_TID_G(GET_TID(rpl));
struct srq_data *s = adap->srq;
struct srq_entry *e;
if (unlikely(rpl->status != CPL_CONTAINS_READ_RPL)) {
dev_err(adap->pdev_dev,
"Unexpected SRQ_TABLE_RPL status %u for entry %u\n",
rpl->status, idx);
goto out;
}
/* Store the read entry */
e = s->entryp;
e->valid = 1;
e->idx = idx;
e->pdid = SRQT_PDID_G(be64_to_cpu(rpl->rsvd_pdid));
e->qlen = SRQT_QLEN_G(be32_to_cpu(rpl->qlen_qbase));
e->qbase = SRQT_QBASE_G(be32_to_cpu(rpl->qlen_qbase));
e->cur_msn = be16_to_cpu(rpl->cur_msn);
e->max_msn = be16_to_cpu(rpl->max_msn);
out:
complete(&s->comp);
}
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