drivers/infiniband/hw/usnic/usnic_ib_sysfs.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/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_log.h"
  47 #include "usnic_ib_sysfs.h"
  48
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 }