[PATCH 05/41] IB/hfi1: add debugfs handling

Mike Marciniszyn
2015-06-11T23:08:55Z

drivers/infiniband/hw/hfi1/debugfs.c | 899 ++++++++++++++++++++++++++++++++++
drivers/infiniband/hw/hfi1/debugfs.h | 78 +++
2 files changed, 977 insertions(+)
create mode 100644 drivers/infiniband/hw/hfi1/debugfs.c
create mode 100644 drivers/infiniband/hw/hfi1/debugfs.h

diff --git a/drivers/infiniband/hw/hfi1/debugfs.c b/drivers/infiniband/hw/hfi1/debugfs.c
new file mode 100644
index 0000000..acd2269
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/debugfs.c
@@ -0,0 +1,899 @@
+#ifdef CONFIG_DEBUG_FS
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+
+#include "hfi.h"
+#include "debugfs.h"
+#include "device.h"
+#include "qp.h"
+#include "sdma.h"
+
+static struct dentry *hfi1_dbg_root;
+
+#define private2dd(file) (file_inode(file)->i_private)
+#define private2ppd(file) (file_inode(file)->i_private)
+
+#define DEBUGFS_SEQ_FILE_OPS(name) \
+static const struct seq_operations _##name##_seq_ops = { \
+ .start = _##name##_seq_start, \
+ .next = _##name##_seq_next, \
+ .stop = _##name##_seq_stop, \
+ .show = _##name##_seq_show \
+}
+#define DEBUGFS_SEQ_FILE_OPEN(name) \
+static int _##name##_open(struct inode *inode, struct file *s) \
+{ \
+ struct seq_file *seq; \
+ int ret; \
+ ret = seq_open(s, &_##name##_seq_ops); \
+ if (ret) \
+ return ret; \
+ seq = s->private_data; \
+ seq->private = inode->i_private; \
+ return 0; \
+}
+
+#define DEBUGFS_FILE_OPS(name) \
+static const struct file_operations _##name##_file_ops = { \
+ .owner = THIS_MODULE, \
+ .open = _##name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = seq_release \
+}
+
+#define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \
+do { \
+ struct dentry *ent; \
+ ent = debugfs_create_file(name, mode, parent, \
+ data, ops); \
+ if (!ent) \
+ pr_warn("create of %s failed\n", name); \
+} while (0)
+
+
+#define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
+ DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO)
+
+static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct hfi1_opcode_stats_perctx *opstats;
+
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(opstats->stats))
+ return NULL;
+ return pos;
+}
+
+static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct hfi1_opcode_stats_perctx *opstats;
+
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(opstats->stats))
+ return NULL;
+ return pos;
+}
+
+
+static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _opcode_stats_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+ loff_t i = *spos, j;
+ u64 n_packets = 0, n_bytes = 0;
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ for (j = 0; j < dd->first_user_ctxt; j++) {
+ if (!dd->rcd[j])
+ continue;
+ n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
+ n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
+ }
+ if (!n_packets && !n_bytes)
+ return SEQ_SKIP;
+ seq_printf(s, "%02llx %llu/%llu\n", i,
+ (unsigned long long) n_packets,
+ (unsigned long long) n_bytes);
+
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(opcode_stats);
+DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
+DEBUGFS_FILE_OPS(opcode_stats);
+
+static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_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 hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_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 hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_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_SEQ_FILE_OPS(ctx_stats);
+DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
+DEBUGFS_FILE_OPS(ctx_stats);
+
+static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct qp_iter *iter;
+ loff_t n = *pos;
+
+ rcu_read_lock();
+ iter = qp_iter_init(s->private);
+ if (!iter)
+ return NULL;
+
+ while (n--) {
+ if (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 qp_iter *iter = iter_ptr;
+
+ (*pos)++;
+
+ if (qp_iter_next(iter)) {
+ kfree(iter);
+ return NULL;
+ }
+
+ return iter;
+}
+
+static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
+{
+ struct qp_iter *iter = iter_ptr;
+
+ if (!iter)
+ return 0;
+
+ qp_iter_print(s, iter);
+
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(qp_stats);
+DEBUGFS_SEQ_FILE_OPEN(qp_stats)
+DEBUGFS_FILE_OPS(qp_stats);
+
+static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct hfi1_ibdev *ibd;
+ struct hfi1_devdata *dd;
+
+ rcu_read_lock();
+ ibd = (struct hfi1_ibdev *)s->private;
+ dd = dd_from_dev(ibd);
+ if (!dd->per_sdma || *pos >= dd->num_sdma)
+ return NULL;
+ return pos;
+}
+
+static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ ++*pos;
+ if (!dd->per_sdma || *pos >= dd->num_sdma)
+ return NULL;
+ return pos;
+}
+
+
+static void _sdes_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _sdes_seq_show(struct seq_file *s, void *v)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+ loff_t *spos = v;
+ loff_t i = *spos;
+
+ sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(sdes);
+DEBUGFS_SEQ_FILE_OPEN(sdes)
+DEBUGFS_FILE_OPS(sdes);
+
+/* read the per-device counters */
+static ssize_t dev_counters_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ u64 *counters;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters);
+ rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/* read the per-device counters */
+static ssize_t dev_names_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *names;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ avail = hfi1_read_cntrs(dd, *ppos, &names, NULL);
+ rval = simple_read_from_buffer(buf, count, ppos, names, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+struct counter_info {
+ char *name;
+ const struct file_operations ops;
+};
+
+/*
+ * Could use file_inode(file)->i_ino to figure out which file,
+ * instead of separate routine for each, but for now, this works...
+ */
+
+/* read the per-port names (same for each port) */
+static ssize_t portnames_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *names;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ /* port number n/a here since names are constant */
+ avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL);
+ rval = simple_read_from_buffer(buf, count, ppos, names, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/* read the per-port counters */
+static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ u64 *counters;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+ dd = ppd->dd;
+ avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters);
+ rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/*
+ * read the per-port QSFP data for ppd
+ */
+static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hfi1_pportdata *ppd;
+ char *tmp;
+ int ret;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+ tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!tmp) {
+ rcu_read_unlock();
+ return -ENOMEM;
+ }
+
+ ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
+ if (ret > 0)
+ ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
+ rcu_read_unlock();
+ kfree(tmp);
+ return ret;
+}
+
+/* Do an i2c write operation on the chain for the given HFI. */
+static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int i2c_addr;
+ int offset;
+ int total_written;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ ret = copy_from_user(buff, buf, count);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ i2c_addr = (*ppos >> 16) & 0xff;
+ offset = *ppos & 0xffff;
+
+ total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
+ if (total_written < 0) {
+ ret = total_written;
+ goto _free;
+ }
+
+ *ppos += total_written;
+
+ ret = total_written;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do an i2c write operation on chain for HFI 0. */
+static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_write(file, buf, count, ppos, 0);
+}
+
+/* Do an i2c write operation on chain for HFI 1. */
+static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_write(file, buf, count, ppos, 1);
+}
+
+/* Do an i2c read operation on the chain for the given HFI. */
+static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int i2c_addr;
+ int offset;
+ int total_read;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ i2c_addr = (*ppos >> 16) & 0xff;
+ offset = *ppos & 0xffff;
+
+ total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
+ if (total_read < 0) {
+ ret = total_read;
+ goto _free;
+ }
+
+ *ppos += total_read;
+
+ ret = copy_to_user(buf, buff, total_read);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ ret = total_read;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do an i2c read operation on chain for HFI 0. */
+static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_read(file, buf, count, ppos, 0);
+}
+
+/* Do an i2c read operation on chain for HFI 1. */
+static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_read(file, buf, count, ppos, 1);
+}
+
+/* Do a QSFP write operation on the i2c chain for the given HFI. */
+static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int total_written;
+
+ rcu_read_lock();
+ if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
+ ret = -EINVAL;
+ goto _return;
+ }
+
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ ret = copy_from_user(buff, buf, count);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ total_written = qsfp_write(ppd, target, *ppos, buff, count);
+ if (total_written < 0) {
+ ret = total_written;
+ goto _free;
+ }
+
+ *ppos += total_written;
+
+ ret = total_written;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do a QSFP write operation on i2c chain for HFI 0. */
+static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_write(file, buf, count, ppos, 0);
+}
+
+/* Do a QSFP write operation on i2c chain for HFI 1. */
+static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_write(file, buf, count, ppos, 1);
+}
+
+/* Do a QSFP read operation on the i2c chain for the given HFI. */
+static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int total_read;
+
+ rcu_read_lock();
+ if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
+ ret = -EINVAL;
+ goto _return;
+ }
+
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ total_read = qsfp_read(ppd, target, *ppos, buff, count);
+ if (total_read < 0) {
+ ret = total_read;
+ goto _free;
+ }
+
+ *ppos += total_read;
+
+ ret = copy_to_user(buf, buff, total_read);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ ret = total_read;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do a QSFP read operation on i2c chain for HFI 0. */
+static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_read(file, buf, count, ppos, 0);
+}
+
+/* Do a QSFP read operation on i2c chain for HFI 1. */
+static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_read(file, buf, count, ppos, 1);
+}
+
+#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
+{ \
+ .name = nm, \
+ .ops = { \
+ .read = readroutine, \
+ .write = writeroutine, \
+ .llseek = generic_file_llseek, \
+ }, \
+}
+
+static const struct counter_info cntr_ops[] = {
+ DEBUGFS_OPS("counter_names", dev_names_read, NULL),
+ DEBUGFS_OPS("counters", dev_counters_read, NULL),
+ DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
+};
+
+static const struct counter_info port_cntr_ops[] = {
+ DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
+ DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write),
+ DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write),
+ DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
+ DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write),
+ DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write),
+};
+
+void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
+{
+ char name[sizeof("port0counters") + 1];
+ char link[10];
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+ struct hfi1_pportdata *ppd;
+ int unit = dd->unit;
+ int i, j;
+
+ if (!hfi1_dbg_root)
+ return;
+ snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
+ snprintf(link, sizeof(link), "%d", unit);
+ ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
+ if (!ibd->hfi1_ibdev_dbg) {
+ pr_warn("create of %s failed\n", name);
+ return;
+ }
+ ibd->hfi1_ibdev_link =
+ debugfs_create_symlink(link, hfi1_dbg_root, name);
+ if (!ibd->hfi1_ibdev_link) {
+ pr_warn("create of %s symlink failed\n", name);
+ return;
+ }
+ DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
+ /* dev counter files */
+ for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
+ DEBUGFS_FILE_CREATE(cntr_ops[i].name,
+ ibd->hfi1_ibdev_dbg,
+ dd,
+ &cntr_ops[i].ops, S_IRUGO);
+ /* per port files */
+ for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
+ for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
+ snprintf(name,
+ sizeof(name),
+ port_cntr_ops[i].name,
+ j + 1);
+ DEBUGFS_FILE_CREATE(name,
+ ibd->hfi1_ibdev_dbg,
+ ppd,
+ &port_cntr_ops[i].ops,
+ port_cntr_ops[i].ops.write == NULL ?
+ S_IRUGO : S_IRUGO|S_IWUSR);
+ }
+}
+
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
+{
+ if (!hfi1_dbg_root)
+ goto out;
+ debugfs_remove(ibd->hfi1_ibdev_link);
+ debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
+out:
+ ibd->hfi1_ibdev_dbg = NULL;
+ synchronize_rcu();
+}
+
+/*
+ * driver stats field names, one line per stat, single string. Used by
+ * programs like hfistats to print the stats in a way which works for
+ * different versions of drivers, without changing program source.
+ * if hfi1_ib_stats changes, this needs to change. Names need to be
+ * 12 chars or less (w/o newline), for proper display by hfistats utility.
+ */
+static const char * const hfi1_statnames[] = {
+ /* must be element 0*/
+ "KernIntr",
+ "ErrorIntr",
+ "Tx_Errs",
+ "Rcv_Errs",
+ "H/W_Errs",
+ "NoPIOBufs",
+ "CtxtsOpen",
+ "RcvLen_Errs",
+ "EgrBufFull",
+ "EgrHdrFull"
+};
+
+static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void *_driver_stats_names_seq_next(
+ struct seq_file *s,
+ void *v,
+ loff_t *pos)
+{
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+
+ seq_printf(s, "%s\n", hfi1_statnames[*spos]);
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
+DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
+DEBUGFS_FILE_OPS(driver_stats_names);
+
+static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void _driver_stats_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static u64 hfi1_sps_ints(void)
+{
+ unsigned long flags;
+ struct hfi1_devdata *dd;
+ u64 sps_ints = 0;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ list_for_each_entry(dd, &hfi1_dev_list, list) {
+ sps_ints += get_all_cpu_total(dd->int_counter);
+ }
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+ return sps_ints;
+}
+
+static int _driver_stats_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+ char *buffer;
+ u64 *stats = (u64 *)&hfi1_stats;
+ size_t sz = seq_get_buf(s, &buffer);
+
+ if (sz < sizeof(u64))
+ return SEQ_SKIP;
+ /* special case for interrupts */
+ if (*spos == 0)
+ *(u64 *)buffer = hfi1_sps_ints();
+ else
+ *(u64 *)buffer = stats[*spos];
+ seq_commit(s, sizeof(u64));
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(driver_stats);
+DEBUGFS_SEQ_FILE_OPEN(driver_stats)
+DEBUGFS_FILE_OPS(driver_stats);
+
+void hfi1_dbg_init(void)
+{
+ hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
+ if (!hfi1_dbg_root)
+ pr_warn("init of debugfs failed\n");
+ DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
+ DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
+}
+
+void hfi1_dbg_exit(void)
+{
+ debugfs_remove_recursive(hfi1_dbg_root);
+ hfi1_dbg_root = NULL;
+}
+
+#endif
diff --git a/drivers/infiniband/hw/hfi1/debugfs.h b/drivers/infiniband/hw/hfi1/debugfs.h
new file mode 100644
index 0000000..92d6fe1
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/debugfs.h
@@ -0,0 +1,78 @@
+#ifndef _HFI1_DEBUGFS_H
+#define _HFI1_DEBUGFS_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+struct hfi1_ibdev;
+#ifdef CONFIG_DEBUG_FS
+void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd);
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd);
+void hfi1_dbg_init(void);
+void hfi1_dbg_exit(void);
+#else
+static inline void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
+{
+}
+
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
+{
+}
+
+void hfi1_dbg_init(void)
+{
+}
+
+void hfi1_dbg_exit(void)
+{
+}
+
+#endif
+
+#endif /* _HFI1_DEBUGFS_H */