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Commit 1dd173b0 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Roland Dreier
Browse files

IB/qib: Add qp_stats debug file 



This adds a seq_file iterator for reporting the QP hash table when the
qp_stats file is read.

Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 17db3a92

drivers/infiniband/hw/qib/qib_debugfs.c

+54 −0
Original line number Diff line number Diff line
@@ -188,6 +188,59 @@ static int _ctx_stats_seq_show(struct seq_file *s, void *v) 


DEBUGFS_FILE(ctx_stats)



static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)

{

	struct qib_qp_iter *iter;

	loff_t n = *pos;



	iter = qib_qp_iter_init(s->private);

	if (!iter)

		return NULL;



	while (n--) {

		if (qib_qp_iter_next(iter)) {

			kfree(iter);

			return NULL;

		}

	}



	return iter;

}



static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,

				   loff_t *pos)

{

	struct qib_qp_iter *iter = iter_ptr;



	(*pos)++;



	if (qib_qp_iter_next(iter)) {

		kfree(iter);

		return NULL;

	}



	return iter;

}



static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)

{

	/* nothing for now */

}



static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)

{

	struct qib_qp_iter *iter = iter_ptr;



	if (!iter)

		return 0;



	qib_qp_iter_print(s, iter);



	return 0;

}



DEBUGFS_FILE(qp_stats)



void qib_dbg_ibdev_init(struct qib_ibdev *ibd)

{

	char name[10];
@@ -200,6 +253,7 @@ void qib_dbg_ibdev_init(struct qib_ibdev *ibd) 
	}

	DEBUGFS_FILE_CREATE(opcode_stats);

	DEBUGFS_FILE_CREATE(ctx_stats);

	DEBUGFS_FILE_CREATE(qp_stats);

	return;

}

drivers/infiniband/hw/qib/qib_qp.c

+94 −0
Original line number Diff line number Diff line
@@ -35,6 +35,9 @@ 
#include <linux/err.h>

#include <linux/vmalloc.h>

#include <linux/jhash.h>

#ifdef CONFIG_DEBUG_FS

#include <linux/seq_file.h>

#endif



#include "qib.h"
@@ -1287,3 +1290,94 @@ void qib_get_credit(struct qib_qp *qp, u32 aeth) 
		}

	}

}



#ifdef CONFIG_DEBUG_FS



struct qib_qp_iter {

	struct qib_ibdev *dev;

	struct qib_qp *qp;

	int n;

};



struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev)

{

	struct qib_qp_iter *iter;



	iter = kzalloc(sizeof(*iter), GFP_KERNEL);

	if (!iter)

		return NULL;



	iter->dev = dev;

	if (qib_qp_iter_next(iter)) {

		kfree(iter);

		return NULL;

	}



	return iter;

}



int qib_qp_iter_next(struct qib_qp_iter *iter)

{

	struct qib_ibdev *dev = iter->dev;

	int n = iter->n;

	int ret = 1;

	struct qib_qp *pqp = iter->qp;

	struct qib_qp *qp;



	rcu_read_lock();

	for (; n < dev->qp_table_size; n++) {

		if (pqp)

			qp = rcu_dereference(pqp->next);

		else

			qp = rcu_dereference(dev->qp_table[n]);

		pqp = qp;

		if (qp) {

			if (iter->qp)

				atomic_dec(&iter->qp->refcount);

			atomic_inc(&qp->refcount);

			rcu_read_unlock();

			iter->qp = qp;

			iter->n = n;

			return 0;

		}

	}

	rcu_read_unlock();

	if (iter->qp)

		atomic_dec(&iter->qp->refcount);

	return ret;

}



static const char * const qp_type_str[] = {

	"SMI", "GSI", "RC", "UC", "UD",

};



void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter)

{

	struct qib_swqe *wqe;

	struct qib_qp *qp = iter->qp;



	wqe = get_swqe_ptr(qp, qp->s_last);

	seq_printf(s,

		   "N %d QP%u %s %u %u %u f=%x %u %u %u %u %u PSN %x %x %x %x %x (%u %u %u %u %u %u) QP%u LID %x\n",

		   iter->n,

		   qp->ibqp.qp_num,

		   qp_type_str[qp->ibqp.qp_type],

		   qp->state,

		   wqe->wr.opcode,

		   qp->s_hdrwords,

		   qp->s_flags,

		   atomic_read(&qp->s_dma_busy),

		   !list_empty(&qp->iowait),

		   qp->timeout,

		   wqe->ssn,

		   qp->s_lsn,

		   qp->s_last_psn,

		   qp->s_psn, qp->s_next_psn,

		   qp->s_sending_psn, qp->s_sending_hpsn,

		   qp->s_last, qp->s_acked, qp->s_cur,

		   qp->s_tail, qp->s_head, qp->s_size,

		   qp->remote_qpn,

		   qp->remote_ah_attr.dlid);

}



#endif

drivers/infiniband/hw/qib/qib_verbs.h

+13 −1
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2012 Intel Corporation.  All rights reserved.

 * Copyright (c) 2012, 2013 Intel Corporation.  All rights reserved.

 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.

 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.

 *
@@ -917,6 +917,18 @@ void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt); 


void qib_free_qpn_table(struct qib_qpn_table *qpt);



#ifdef CONFIG_DEBUG_FS



struct qib_qp_iter;



struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev);



int qib_qp_iter_next(struct qib_qp_iter *iter);



void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter);



#endif



void qib_get_credit(struct qib_qp *qp, u32 aeth);



unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);