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cxgb4: Add support to initialise/read SRQ entries
- This patch adds support to initialise srq table and read srq entries Signed-off-by: Raju Rangoju <rajur@chelsio.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raju Rangoju
David S. Miller
parent
a3cdaa69e4
commit
e47094751d
@ -6,7 +6,7 @@
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obj-$(CONFIG_CHELSIO_T4) += cxgb4.o
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cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o \
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cxgb4_uld.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \
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cxgb4_uld.o srq.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \
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cxgb4_ptp.o cxgb4_tc_flower.o cxgb4_cudbg.o \
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cudbg_common.o cudbg_lib.o cudbg_zlib.o
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cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o
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@ -960,6 +960,8 @@ struct adapter {
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/* HMA */
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struct hma_data hma;
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struct srq_data *srq;
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};
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/* Support for "sched-class" command to allow a TX Scheduling Class to be
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138
drivers/net/ethernet/chelsio/cxgb4/srq.c
Normal file
138
drivers/net/ethernet/chelsio/cxgb4/srq.c
Normal file
@ -0,0 +1,138 @@
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/*
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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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65
drivers/net/ethernet/chelsio/cxgb4/srq.h
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65
drivers/net/ethernet/chelsio/cxgb4/srq.h
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@ -0,0 +1,65 @@
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/*
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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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#ifndef __CXGB4_SRQ_H
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#define __CXGB4_SRQ_H
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struct adapter;
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struct cpl_srq_table_rpl;
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#define SRQ_WAIT_TO (HZ * 5)
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struct srq_entry {
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u8 valid;
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u8 idx;
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u8 qlen;
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u16 pdid;
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u16 cur_msn;
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u16 max_msn;
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u32 qbase;
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};
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struct srq_data {
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unsigned int srq_size;
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struct srq_entry *entryp;
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struct completion comp;
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struct mutex lock; /* generic mutex for srq data */
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};
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struct srq_data *t4_init_srq(int srq_size);
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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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void do_srq_table_rpl(struct adapter *adap,
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const struct cpl_srq_table_rpl *rpl);
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#endif /* __CXGB4_SRQ_H */
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