139 строки
3.8 KiB
C
139 строки
3.8 KiB
C
/*
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* This file is part of the Chelsio T6 Ethernet driver for Linux.
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*
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* Copyright (c) 2017-2018 Chelsio Communications, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "cxgb4.h"
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#include "t4_msg.h"
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#include "srq.h"
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struct srq_data *t4_init_srq(int srq_size)
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{
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struct srq_data *s;
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s = kvzalloc(sizeof(*s), GFP_KERNEL);
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if (!s)
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return NULL;
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s->srq_size = srq_size;
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init_completion(&s->comp);
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mutex_init(&s->lock);
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return s;
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}
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/* cxgb4_get_srq_entry: read the SRQ table entry
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* @dev: Pointer to the net_device
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* @idx: Index to the srq
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* @entryp: pointer to the srq entry
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*
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* Sends CPL_SRQ_TABLE_REQ message for the given index.
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* Contents will be returned in CPL_SRQ_TABLE_RPL message.
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*
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* Returns zero if the read is successful, else a error
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* number will be returned. Caller should not use the srq
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* entry if the return value is non-zero.
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*
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*
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*/
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int cxgb4_get_srq_entry(struct net_device *dev,
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int srq_idx, struct srq_entry *entryp)
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{
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struct cpl_srq_table_req *req;
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struct adapter *adap;
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struct sk_buff *skb;
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struct srq_data *s;
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int rc = -ENODEV;
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adap = netdev2adap(dev);
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s = adap->srq;
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if (!(adap->flags & FULL_INIT_DONE) || !s)
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goto out;
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skb = alloc_skb(sizeof(*req), GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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req = (struct cpl_srq_table_req *)
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__skb_put(skb, sizeof(*req));
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memset(req, 0, sizeof(*req));
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INIT_TP_WR(req, 0);
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OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SRQ_TABLE_REQ,
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TID_TID_V(srq_idx) |
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TID_QID_V(adap->sge.fw_evtq.abs_id)));
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req->idx = srq_idx;
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mutex_lock(&s->lock);
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s->entryp = entryp;
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t4_mgmt_tx(adap, skb);
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rc = wait_for_completion_timeout(&s->comp, SRQ_WAIT_TO);
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if (rc)
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rc = 0;
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else /* !rc means we timed out */
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rc = -ETIMEDOUT;
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WARN_ON_ONCE(entryp->idx != srq_idx);
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mutex_unlock(&s->lock);
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out:
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return rc;
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}
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EXPORT_SYMBOL(cxgb4_get_srq_entry);
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void do_srq_table_rpl(struct adapter *adap,
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const struct cpl_srq_table_rpl *rpl)
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{
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unsigned int idx = TID_TID_G(GET_TID(rpl));
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struct srq_data *s = adap->srq;
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struct srq_entry *e;
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if (unlikely(rpl->status != CPL_CONTAINS_READ_RPL)) {
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dev_err(adap->pdev_dev,
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"Unexpected SRQ_TABLE_RPL status %u for entry %u\n",
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rpl->status, idx);
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goto out;
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}
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/* Store the read entry */
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e = s->entryp;
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e->valid = 1;
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e->idx = idx;
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e->pdid = SRQT_PDID_G(be64_to_cpu(rpl->rsvd_pdid));
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e->qlen = SRQT_QLEN_G(be32_to_cpu(rpl->qlen_qbase));
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e->qbase = SRQT_QBASE_G(be32_to_cpu(rpl->qlen_qbase));
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e->cur_msn = be16_to_cpu(rpl->cur_msn);
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e->max_msn = be16_to_cpu(rpl->max_msn);
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out:
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complete(&s->comp);
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}
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