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