Commit e4709475 authored by Raju Rangoju's avatar Raju Rangoju Committed by David S. Miller
Browse files

cxgb4: Add support to initialise/read SRQ entries 



- This patch adds support to initialise srq table and read srq entries

Signed-off-by: default avatarRaju Rangoju <rajur@chelsio.com>
Reviewed-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a3cdaa69

drivers/net/ethernet/chelsio/cxgb4/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
obj-$(CONFIG_CHELSIO_T4) += cxgb4.o



cxgb4-objs := cxgb4_main.o l2t.o smt.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o \

	      cxgb4_uld.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \

	      cxgb4_uld.o srq.o sched.o cxgb4_filter.o cxgb4_tc_u32.o \

	      cxgb4_ptp.o cxgb4_tc_flower.o cxgb4_cudbg.o \

	      cudbg_common.o cudbg_lib.o cudbg_zlib.o

cxgb4-$(CONFIG_CHELSIO_T4_DCB) +=  cxgb4_dcb.o

drivers/net/ethernet/chelsio/cxgb4/cxgb4.h

+2 −0
Original line number Diff line number Diff line
@@ -960,6 +960,8 @@ struct adapter { 


	/* HMA */

	struct hma_data hma;



	struct srq_data *srq;

};



/* Support for "sched-class" command to allow a TX Scheduling Class to be

drivers/net/ethernet/chelsio/cxgb4/srq.c

0 → 100644
+138 −0
Original line number Diff line number Diff line 
/*

 * 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 & 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(skb, sizeof(*req));

	memset(req, 0, 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);

}

drivers/net/ethernet/chelsio/cxgb4/srq.h

0 → 100644
+65 −0
Original line number Diff line number Diff line 
/*

 * 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.

 */



#ifndef __CXGB4_SRQ_H

#define __CXGB4_SRQ_H



struct adapter;

struct cpl_srq_table_rpl;



#define SRQ_WAIT_TO	(HZ * 5)



struct srq_entry {

	u8 valid;

	u8 idx;

	u8 qlen;

	u16 pdid;

	u16 cur_msn;

	u16 max_msn;

	u32 qbase;

};



struct srq_data {

	unsigned int srq_size;

	struct srq_entry *entryp;

	struct completion comp;

	struct mutex lock; /* generic mutex for srq data */

};



struct srq_data *t4_init_srq(int srq_size);

int cxgb4_get_srq_entry(struct net_device *dev,

			int srq_idx, struct srq_entry *entryp);

void do_srq_table_rpl(struct adapter *adap,

		      const struct cpl_srq_table_rpl *rpl);

#endif  /* __CXGB4_SRQ_H */

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