138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/*
|
|
* 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);
|
|
}
|