Loading...
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/init.h>
35#include <linux/errno.h>
36
37#include <rdma/ib_user_verbs.h>
38#include <rdma/ib_addr.h>
39
40#include "usnic_common_util.h"
41#include "usnic_ib.h"
42#include "usnic_ib_qp_grp.h"
43#include "usnic_vnic.h"
44#include "usnic_ib_verbs.h"
45#include "usnic_ib_sysfs.h"
46#include "usnic_log.h"
47
48static ssize_t board_id_show(struct device *device,
49 struct device_attribute *attr, char *buf)
50{
51 struct usnic_ib_dev *us_ibdev =
52 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
53 unsigned short subsystem_device_id;
54
55 mutex_lock(&us_ibdev->usdev_lock);
56 subsystem_device_id = us_ibdev->pdev->subsystem_device;
57 mutex_unlock(&us_ibdev->usdev_lock);
58
59 return sysfs_emit(buf, "%u\n", subsystem_device_id);
60}
61static DEVICE_ATTR_RO(board_id);
62
63/*
64 * Report the configuration for this PF
65 */
66static ssize_t
67config_show(struct device *device, struct device_attribute *attr, char *buf)
68{
69 struct usnic_ib_dev *us_ibdev =
70 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
71 enum usnic_vnic_res_type res_type;
72 int len;
73
74 mutex_lock(&us_ibdev->usdev_lock);
75 if (kref_read(&us_ibdev->vf_cnt) > 0) {
76 char *busname;
77 char *sep = "";
78 /*
79 * bus name seems to come with annoying prefix.
80 * Remove it if it is predictable
81 */
82 busname = us_ibdev->pdev->bus->name;
83 if (strncmp(busname, "PCI Bus ", 8) == 0)
84 busname += 8;
85
86 len = sysfs_emit(buf, "%s: %s:%d.%d, %s, %pM, %u VFs\n",
87 dev_name(&us_ibdev->ib_dev.dev),
88 busname,
89 PCI_SLOT(us_ibdev->pdev->devfn),
90 PCI_FUNC(us_ibdev->pdev->devfn),
91 netdev_name(us_ibdev->netdev),
92 us_ibdev->ufdev->mac,
93 kref_read(&us_ibdev->vf_cnt));
94
95 len += sysfs_emit_at(buf, len, " Per VF:");
96 for (res_type = USNIC_VNIC_RES_TYPE_EOL;
97 res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++) {
98 if (us_ibdev->vf_res_cnt[res_type] == 0)
99 continue;
100 len += sysfs_emit_at(buf, len, "%s %d %s",
101 sep,
102 us_ibdev->vf_res_cnt[res_type],
103 usnic_vnic_res_type_to_str(res_type));
104 sep = ",";
105 }
106 len += sysfs_emit_at(buf, len, "\n");
107 } else {
108 len = sysfs_emit(buf, "%s: no VFs\n",
109 dev_name(&us_ibdev->ib_dev.dev));
110 }
111
112 mutex_unlock(&us_ibdev->usdev_lock);
113
114 return len;
115}
116static DEVICE_ATTR_RO(config);
117
118static ssize_t
119iface_show(struct device *device, struct device_attribute *attr, char *buf)
120{
121 struct usnic_ib_dev *us_ibdev =
122 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
123
124 return sysfs_emit(buf, "%s\n", netdev_name(us_ibdev->netdev));
125}
126static DEVICE_ATTR_RO(iface);
127
128static ssize_t
129max_vf_show(struct device *device, struct device_attribute *attr, char *buf)
130{
131 struct usnic_ib_dev *us_ibdev =
132 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
133
134 return sysfs_emit(buf, "%u\n", kref_read(&us_ibdev->vf_cnt));
135}
136static DEVICE_ATTR_RO(max_vf);
137
138static ssize_t
139qp_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
140{
141 struct usnic_ib_dev *us_ibdev =
142 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
143 int qp_per_vf;
144
145 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
146 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
147
148 return sysfs_emit(buf, "%d\n", qp_per_vf);
149}
150static DEVICE_ATTR_RO(qp_per_vf);
151
152static ssize_t
153cq_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
154{
155 struct usnic_ib_dev *us_ibdev =
156 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
157
158 return sysfs_emit(buf, "%d\n",
159 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
160}
161static DEVICE_ATTR_RO(cq_per_vf);
162
163static struct attribute *usnic_class_attributes[] = {
164 &dev_attr_board_id.attr,
165 &dev_attr_config.attr,
166 &dev_attr_iface.attr,
167 &dev_attr_max_vf.attr,
168 &dev_attr_qp_per_vf.attr,
169 &dev_attr_cq_per_vf.attr,
170 NULL
171};
172
173const struct attribute_group usnic_attr_group = {
174 .attrs = usnic_class_attributes,
175};
176
177struct qpn_attribute {
178 struct attribute attr;
179 ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
180};
181
182/*
183 * Definitions for supporting QPN entries in sysfs
184 */
185static ssize_t
186usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
187{
188 struct usnic_ib_qp_grp *qp_grp;
189 struct qpn_attribute *qpn_attr;
190
191 qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
192 qpn_attr = container_of(attr, struct qpn_attribute, attr);
193
194 return qpn_attr->show(qp_grp, buf);
195}
196
197static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
198 .show = usnic_ib_qpn_attr_show
199};
200
201#define QPN_ATTR_RO(NAME) \
202struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
203
204static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
205{
206 return sysfs_emit(buf, "0x%p\n", qp_grp->ctx);
207}
208
209static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
210{
211 int i, j;
212 struct usnic_vnic_res_chunk *res_chunk;
213 struct usnic_vnic_res *vnic_res;
214 int len;
215
216 len = sysfs_emit(buf, "QPN: %d State: (%s) PID: %u VF Idx: %hu",
217 qp_grp->ibqp.qp_num,
218 usnic_ib_qp_grp_state_to_string(qp_grp->state),
219 qp_grp->owner_pid,
220 usnic_vnic_get_index(qp_grp->vf->vnic));
221
222 for (i = 0; qp_grp->res_chunk_list[i]; i++) {
223 res_chunk = qp_grp->res_chunk_list[i];
224 for (j = 0; j < res_chunk->cnt; j++) {
225 vnic_res = res_chunk->res[j];
226 len += sysfs_emit_at(buf, len, " %s[%d]",
227 usnic_vnic_res_type_to_str(vnic_res->type),
228 vnic_res->vnic_idx);
229 }
230 }
231
232 len += sysfs_emit_at(buf, len, "\n");
233
234 return len;
235}
236
237static QPN_ATTR_RO(context);
238static QPN_ATTR_RO(summary);
239
240static struct attribute *usnic_ib_qpn_default_attrs[] = {
241 &qpn_attr_context.attr,
242 &qpn_attr_summary.attr,
243 NULL
244};
245ATTRIBUTE_GROUPS(usnic_ib_qpn_default);
246
247static struct kobj_type usnic_ib_qpn_type = {
248 .sysfs_ops = &usnic_ib_qpn_sysfs_ops,
249 .default_groups = usnic_ib_qpn_default_groups,
250};
251
252int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
253{
254 /* create kernel object for looking at individual QPs */
255 kobject_get(&us_ibdev->ib_dev.dev.kobj);
256 us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
257 &us_ibdev->ib_dev.dev.kobj);
258 if (us_ibdev->qpn_kobj == NULL) {
259 kobject_put(&us_ibdev->ib_dev.dev.kobj);
260 return -ENOMEM;
261 }
262
263 return 0;
264}
265
266void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
267{
268 kobject_put(us_ibdev->qpn_kobj);
269}
270
271void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
272{
273 struct usnic_ib_dev *us_ibdev;
274 int err;
275
276 us_ibdev = qp_grp->vf->pf;
277
278 err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
279 kobject_get(us_ibdev->qpn_kobj),
280 "%d", qp_grp->grp_id);
281 if (err) {
282 kobject_put(us_ibdev->qpn_kobj);
283 return;
284 }
285}
286
287void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
288{
289 struct usnic_ib_dev *us_ibdev;
290
291 us_ibdev = qp_grp->vf->pf;
292
293 kobject_put(&qp_grp->kobj);
294 kobject_put(us_ibdev->qpn_kobj);
295}