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: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/qib/qib_debugfs.c b/drivers/infiniband/hw/qib/qib_debugfs.c
index a4e6ee1..799a0c3 100644
--- a/drivers/infiniband/hw/qib/qib_debugfs.c
+++ b/drivers/infiniband/hw/qib/qib_debugfs.c
@@ -188,6 +188,59 @@
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 @@
}
DEBUGFS_FILE_CREATE(opcode_stats);
DEBUGFS_FILE_CREATE(ctx_stats);
+ DEBUGFS_FILE_CREATE(qp_stats);
return;
}
diff --git a/drivers/infiniband/hw/qib/qib_qp.c b/drivers/infiniband/hw/qib/qib_qp.c
index c1f573a..3cca55b 100644
--- a/drivers/infiniband/hw/qib/qib_qp.c
+++ b/drivers/infiniband/hw/qib/qib_qp.c
@@ -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 @@
}
}
}
+
+#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
diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h
index 4a22a85..012e2c7 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.h
+++ b/drivers/infiniband/hw/qib/qib_verbs.h
@@ -1,5 +1,5 @@
/*
- * 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_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);