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Commit 17db3a92 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Roland Dreier
Browse files

IB/qib: Add per-context stats interface 



This patch adds a debugfs stats interface for per kernel contexts
packet counts.

The code uses the opcode stats count and eliminates the counter in the
context.

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 ddb88765

drivers/infiniband/hw/qib/qib_debugfs.c

+63 −0
Original line number Original line Diff line number Diff line
@@ -126,6 +126,68 @@ static int _opcode_stats_seq_show(struct seq_file *s, void *v) 




DEBUGFS_FILE(opcode_stats)

DEBUGFS_FILE(opcode_stats)





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

{

	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;

	struct qib_devdata *dd = dd_from_dev(ibd);



	if (!*pos)

		return SEQ_START_TOKEN;

	if (*pos >= dd->first_user_ctxt)

		return NULL;

	return pos;

}



static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)

{

	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;

	struct qib_devdata *dd = dd_from_dev(ibd);



	if (v == SEQ_START_TOKEN)

		return pos;



	++*pos;

	if (*pos >= dd->first_user_ctxt)

		return NULL;

	return pos;

}



static void _ctx_stats_seq_stop(struct seq_file *s, void *v)

{

	/* nothing allocated */

}



static int _ctx_stats_seq_show(struct seq_file *s, void *v)

{

	loff_t *spos;

	loff_t i, j;

	u64 n_packets = 0;

	struct qib_ibdev *ibd = (struct qib_ibdev *)s->private;

	struct qib_devdata *dd = dd_from_dev(ibd);



	if (v == SEQ_START_TOKEN) {

		seq_puts(s, "Ctx:npkts\n");

		return 0;

	}



	spos = v;

	i = *spos;



	if (!dd->rcd[i])

		return SEQ_SKIP;



	for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)

		n_packets += dd->rcd[i]->opstats->stats[j].n_packets;



	if (!n_packets)

		return SEQ_SKIP;



	seq_printf(s, "  %llu:%llu\n", i, n_packets);

	return 0;

}



DEBUGFS_FILE(ctx_stats)



void qib_dbg_ibdev_init(struct qib_ibdev *ibd)

void qib_dbg_ibdev_init(struct qib_ibdev *ibd)

{

{

	char name[10];

	char name[10];
@@ -137,6 +199,7 @@ void qib_dbg_ibdev_init(struct qib_ibdev *ibd) 
		return;

		return;

	}

	}

	DEBUGFS_FILE_CREATE(opcode_stats);

	DEBUGFS_FILE_CREATE(opcode_stats);

	DEBUGFS_FILE_CREATE(ctx_stats);

	return;

	return;

}

}