drivers/infiniband/hw/usnic/usnic_debugfs.c

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/debugfs.h>
  35
  36 #include "usnic.h"
  37 #include "usnic_log.h"
  38 #include "usnic_debugfs.h"
  39 #include "usnic_ib_qp_grp.h"
  40 #include "usnic_transport.h"
  41
  42 static struct dentry *debugfs_root;
  43 static struct dentry *flows_dentry;
  44
  45 static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
  46                                                 size_t count, loff_t *ppos)
  47 {
  48         char buf[500];
  49         int res;
  50
  51         if (*ppos > 0)
  52                 return 0;
  53
  54         res = scnprintf(buf, sizeof(buf),
  55                         "version:       %s\n"
  56                         "build date:    %s\n",
  57                         DRV_VERSION, DRV_RELDATE);
  58
  59         return simple_read_from_buffer(data, count, ppos, buf, res);
  60 }
  61
  62 static const struct file_operations usnic_debugfs_buildinfo_ops = {
  63         .owner = THIS_MODULE,
  64         .open = simple_open,
  65         .read = usnic_debugfs_buildinfo_read
  66 };
  67
  68 static ssize_t flowinfo_read(struct file *f, char __user *data,
  69                                 size_t count, loff_t *ppos)
  70 {
  71         struct usnic_ib_qp_grp_flow *qp_flow;
  72         int n;
  73         int left;
  74         char *ptr;
  75         char buf[512];
  76
  77         qp_flow = f->private_data;
  78         ptr = buf;
  79         left = count;
  80
  81         if (*ppos > 0)
  82                 return 0;
  83
  84         spin_lock(&qp_flow->qp_grp->lock);
  85         n = scnprintf(ptr, left,
  86                         "QP Grp ID: %d Transport: %s ",
  87                         qp_flow->qp_grp->grp_id,
  88                         usnic_transport_to_str(qp_flow->trans_type));
  89         UPDATE_PTR_LEFT(n, ptr, left);
  90         if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
  91                 n = scnprintf(ptr, left, "Port_Num:%hu\n",
  92                                         qp_flow->usnic_roce.port_num);
  93                 UPDATE_PTR_LEFT(n, ptr, left);
  94         } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
  95                 n = usnic_transport_sock_to_str(ptr, left,
  96                                 qp_flow->udp.sock);
  97                 UPDATE_PTR_LEFT(n, ptr, left);
  98                 n = scnprintf(ptr, left, "\n");
  99                 UPDATE_PTR_LEFT(n, ptr, left);
 100         }
 101         spin_unlock(&qp_flow->qp_grp->lock);
 102
 103         return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
 104 }
 105
 106 static const struct file_operations flowinfo_ops = {
 107         .owner = THIS_MODULE,
 108         .open = simple_open,
 109         .read = flowinfo_read,
 110 };
 111
 112 void usnic_debugfs_init(void)
 113 {
 114         debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
 115
 116         flows_dentry = debugfs_create_dir("flows", debugfs_root);
 117
 118         debugfs_create_file("build-info", S_IRUGO, debugfs_root,
 119                                 NULL, &usnic_debugfs_buildinfo_ops);
 120 }
 121
 122 void usnic_debugfs_exit(void)
 123 {
 124         debugfs_remove_recursive(debugfs_root);
 125         debugfs_root = NULL;
 126 }
 127
 128 void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
 129 {
 130         scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
 131                         "%u", qp_flow->flow->flow_id);
 132         qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
 133                                                         S_IRUGO,
 134                                                         flows_dentry,
 135                                                         qp_flow,
 136                                                         &flowinfo_ops);
 137 }
 138
 139 void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
 140 {
 141         debugfs_remove(qp_flow->dbgfs_dentry);
 142 }