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/module.h>
35 #include <linux/init.h>
36 #include <linux/errno.h>
37
38 #include <rdma/ib_user_verbs.h>
39 #include <rdma/ib_addr.h>
40
41 #include "usnic_common_util.h"
42 #include "usnic_ib.h"
43 #include "usnic_ib_qp_grp.h"
44 #include "usnic_vnic.h"
45 #include "usnic_ib_verbs.h"
46 #include "usnic_ib_sysfs.h"
47 #include "usnic_log.h"
48
usnic_ib_show_board(struct device * device,struct device_attribute * attr,char * buf)49 static ssize_t usnic_ib_show_board(struct device *device,
50 struct device_attribute *attr,
51 char *buf)
52 {
53 struct usnic_ib_dev *us_ibdev =
54 container_of(device, struct usnic_ib_dev, ib_dev.dev);
55 unsigned short subsystem_device_id;
56
57 mutex_lock(&us_ibdev->usdev_lock);
58 subsystem_device_id = us_ibdev->pdev->subsystem_device;
59 mutex_unlock(&us_ibdev->usdev_lock);
60
61 return scnprintf(buf, PAGE_SIZE, "%hu\n", subsystem_device_id);
62 }
63
64 /*
65 * Report the configuration for this PF
66 */
67 static ssize_t
usnic_ib_show_config(struct device * device,struct device_attribute * attr,char * buf)68 usnic_ib_show_config(struct device *device, struct device_attribute *attr,
69 char *buf)
70 {
71 struct usnic_ib_dev *us_ibdev;
72 char *ptr;
73 unsigned left;
74 unsigned n;
75 enum usnic_vnic_res_type res_type;
76
77 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
78
79 /* Buffer space limit is 1 page */
80 ptr = buf;
81 left = PAGE_SIZE;
82
83 mutex_lock(&us_ibdev->usdev_lock);
84 if (kref_read(&us_ibdev->vf_cnt) > 0) {
85 char *busname;
86
87 /*
88 * bus name seems to come with annoying prefix.
89 * Remove it if it is predictable
90 */
91 busname = us_ibdev->pdev->bus->name;
92 if (strncmp(busname, "PCI Bus ", 8) == 0)
93 busname += 8;
94
95 n = scnprintf(ptr, left,
96 "%s: %s:%d.%d, %s, %pM, %u VFs\n Per VF:",
97 us_ibdev->ib_dev.name,
98 busname,
99 PCI_SLOT(us_ibdev->pdev->devfn),
100 PCI_FUNC(us_ibdev->pdev->devfn),
101 netdev_name(us_ibdev->netdev),
102 us_ibdev->ufdev->mac,
103 kref_read(&us_ibdev->vf_cnt));
104 UPDATE_PTR_LEFT(n, ptr, left);
105
106 for (res_type = USNIC_VNIC_RES_TYPE_EOL;
107 res_type < USNIC_VNIC_RES_TYPE_MAX;
108 res_type++) {
109 if (us_ibdev->vf_res_cnt[res_type] == 0)
110 continue;
111 n = scnprintf(ptr, left, " %d %s%s",
112 us_ibdev->vf_res_cnt[res_type],
113 usnic_vnic_res_type_to_str(res_type),
114 (res_type < (USNIC_VNIC_RES_TYPE_MAX - 1)) ?
115 "," : "");
116 UPDATE_PTR_LEFT(n, ptr, left);
117 }
118 n = scnprintf(ptr, left, "\n");
119 UPDATE_PTR_LEFT(n, ptr, left);
120 } else {
121 n = scnprintf(ptr, left, "%s: no VFs\n",
122 us_ibdev->ib_dev.name);
123 UPDATE_PTR_LEFT(n, ptr, left);
124 }
125 mutex_unlock(&us_ibdev->usdev_lock);
126
127 return ptr - buf;
128 }
129
130 static ssize_t
usnic_ib_show_iface(struct device * device,struct device_attribute * attr,char * buf)131 usnic_ib_show_iface(struct device *device, struct device_attribute *attr,
132 char *buf)
133 {
134 struct usnic_ib_dev *us_ibdev;
135
136 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
137
138 return scnprintf(buf, PAGE_SIZE, "%s\n",
139 netdev_name(us_ibdev->netdev));
140 }
141
142 static ssize_t
usnic_ib_show_max_vf(struct device * device,struct device_attribute * attr,char * buf)143 usnic_ib_show_max_vf(struct device *device, struct device_attribute *attr,
144 char *buf)
145 {
146 struct usnic_ib_dev *us_ibdev;
147
148 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
149
150 return scnprintf(buf, PAGE_SIZE, "%u\n",
151 kref_read(&us_ibdev->vf_cnt));
152 }
153
154 static ssize_t
usnic_ib_show_qp_per_vf(struct device * device,struct device_attribute * attr,char * buf)155 usnic_ib_show_qp_per_vf(struct device *device, struct device_attribute *attr,
156 char *buf)
157 {
158 struct usnic_ib_dev *us_ibdev;
159 int qp_per_vf;
160
161 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
162 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
163 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
164
165 return scnprintf(buf, PAGE_SIZE,
166 "%d\n", qp_per_vf);
167 }
168
169 static ssize_t
usnic_ib_show_cq_per_vf(struct device * device,struct device_attribute * attr,char * buf)170 usnic_ib_show_cq_per_vf(struct device *device, struct device_attribute *attr,
171 char *buf)
172 {
173 struct usnic_ib_dev *us_ibdev;
174
175 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev);
176
177 return scnprintf(buf, PAGE_SIZE, "%d\n",
178 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
179 }
180
181 static DEVICE_ATTR(board_id, S_IRUGO, usnic_ib_show_board, NULL);
182 static DEVICE_ATTR(config, S_IRUGO, usnic_ib_show_config, NULL);
183 static DEVICE_ATTR(iface, S_IRUGO, usnic_ib_show_iface, NULL);
184 static DEVICE_ATTR(max_vf, S_IRUGO, usnic_ib_show_max_vf, NULL);
185 static DEVICE_ATTR(qp_per_vf, S_IRUGO, usnic_ib_show_qp_per_vf, NULL);
186 static DEVICE_ATTR(cq_per_vf, S_IRUGO, usnic_ib_show_cq_per_vf, NULL);
187
188 static struct device_attribute *usnic_class_attributes[] = {
189 &dev_attr_board_id,
190 &dev_attr_config,
191 &dev_attr_iface,
192 &dev_attr_max_vf,
193 &dev_attr_qp_per_vf,
194 &dev_attr_cq_per_vf,
195 };
196
197 struct qpn_attribute {
198 struct attribute attr;
199 ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
200 };
201
202 /*
203 * Definitions for supporting QPN entries in sysfs
204 */
205 static ssize_t
usnic_ib_qpn_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)206 usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
207 {
208 struct usnic_ib_qp_grp *qp_grp;
209 struct qpn_attribute *qpn_attr;
210
211 qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
212 qpn_attr = container_of(attr, struct qpn_attribute, attr);
213
214 return qpn_attr->show(qp_grp, buf);
215 }
216
217 static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
218 .show = usnic_ib_qpn_attr_show
219 };
220
221 #define QPN_ATTR_RO(NAME) \
222 struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
223
context_show(struct usnic_ib_qp_grp * qp_grp,char * buf)224 static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
225 {
226 return scnprintf(buf, PAGE_SIZE, "0x%p\n", qp_grp->ctx);
227 }
228
summary_show(struct usnic_ib_qp_grp * qp_grp,char * buf)229 static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
230 {
231 int i, j, n;
232 int left;
233 char *ptr;
234 struct usnic_vnic_res_chunk *res_chunk;
235 struct usnic_vnic_res *vnic_res;
236
237 left = PAGE_SIZE;
238 ptr = buf;
239
240 n = scnprintf(ptr, left,
241 "QPN: %d State: (%s) PID: %u VF Idx: %hu ",
242 qp_grp->ibqp.qp_num,
243 usnic_ib_qp_grp_state_to_string(qp_grp->state),
244 qp_grp->owner_pid,
245 usnic_vnic_get_index(qp_grp->vf->vnic));
246 UPDATE_PTR_LEFT(n, ptr, left);
247
248 for (i = 0; qp_grp->res_chunk_list[i]; i++) {
249 res_chunk = qp_grp->res_chunk_list[i];
250 for (j = 0; j < res_chunk->cnt; j++) {
251 vnic_res = res_chunk->res[j];
252 n = scnprintf(ptr, left, "%s[%d] ",
253 usnic_vnic_res_type_to_str(vnic_res->type),
254 vnic_res->vnic_idx);
255 UPDATE_PTR_LEFT(n, ptr, left);
256 }
257 }
258
259 n = scnprintf(ptr, left, "\n");
260 UPDATE_PTR_LEFT(n, ptr, left);
261
262 return ptr - buf;
263 }
264
265 static QPN_ATTR_RO(context);
266 static QPN_ATTR_RO(summary);
267
268 static struct attribute *usnic_ib_qpn_default_attrs[] = {
269 &qpn_attr_context.attr,
270 &qpn_attr_summary.attr,
271 NULL
272 };
273
274 static struct kobj_type usnic_ib_qpn_type = {
275 .sysfs_ops = &usnic_ib_qpn_sysfs_ops,
276 .default_attrs = usnic_ib_qpn_default_attrs
277 };
278
usnic_ib_sysfs_register_usdev(struct usnic_ib_dev * us_ibdev)279 int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
280 {
281 int i;
282 int err;
283 for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) {
284 err = device_create_file(&us_ibdev->ib_dev.dev,
285 usnic_class_attributes[i]);
286 if (err) {
287 usnic_err("Failed to create device file %d for %s eith err %d",
288 i, us_ibdev->ib_dev.name, err);
289 return -EINVAL;
290 }
291 }
292
293 /* create kernel object for looking at individual QPs */
294 kobject_get(&us_ibdev->ib_dev.dev.kobj);
295 us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
296 &us_ibdev->ib_dev.dev.kobj);
297 if (us_ibdev->qpn_kobj == NULL) {
298 kobject_put(&us_ibdev->ib_dev.dev.kobj);
299 return -ENOMEM;
300 }
301
302 return 0;
303 }
304
usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev * us_ibdev)305 void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
306 {
307 int i;
308 for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) {
309 device_remove_file(&us_ibdev->ib_dev.dev,
310 usnic_class_attributes[i]);
311 }
312
313 kobject_put(us_ibdev->qpn_kobj);
314 }
315
usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp * qp_grp)316 void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
317 {
318 struct usnic_ib_dev *us_ibdev;
319 int err;
320
321 us_ibdev = qp_grp->vf->pf;
322
323 err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
324 kobject_get(us_ibdev->qpn_kobj),
325 "%d", qp_grp->grp_id);
326 if (err) {
327 kobject_put(us_ibdev->qpn_kobj);
328 return;
329 }
330 }
331
usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp * qp_grp)332 void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
333 {
334 struct usnic_ib_dev *us_ibdev;
335
336 us_ibdev = qp_grp->vf->pf;
337
338 kobject_put(&qp_grp->kobj);
339 kobject_put(us_ibdev->qpn_kobj);
340 }
341
