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_ib_sysfs.h"
  47 #include "usnic_log.h"
  48
  49 static ssize_t board_id_show(struct device *device,
  50                              struct device_attribute *attr, char *buf)
  51 {
  52         struct usnic_ib_dev *us_ibdev =
  53                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_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 sysfs_emit(buf, "%u\n", subsystem_device_id);
  61 }
  62 static DEVICE_ATTR_RO(board_id);
  63
  64 /*
  65  * Report the configuration for this PF
  66  */
  67 static ssize_t
  68 config_show(struct device *device, struct device_attribute *attr, char *buf)
  69 {
  70         struct usnic_ib_dev *us_ibdev =
  71                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
  72         enum usnic_vnic_res_type res_type;
  73         int len;
  74
  75         mutex_lock(&us_ibdev->usdev_lock);
  76         if (kref_read(&us_ibdev->vf_cnt) > 0) {
  77                 char *busname;
  78                 char *sep = "";
  79                 /*
  80                  * bus name seems to come with annoying prefix.
  81                  * Remove it if it is predictable
  82                  */
  83                 busname = us_ibdev->pdev->bus->name;
  84                 if (strncmp(busname, "PCI Bus ", 8) == 0)
  85                         busname += 8;
  86
  87                 len = sysfs_emit(buf, "%s: %s:%d.%d, %s, %pM, %u VFs\n",
  88                                  dev_name(&us_ibdev->ib_dev.dev),
  89                                  busname,
  90                                  PCI_SLOT(us_ibdev->pdev->devfn),
  91                                  PCI_FUNC(us_ibdev->pdev->devfn),
  92                                  netdev_name(us_ibdev->netdev),
  93                                  us_ibdev->ufdev->mac,
  94                                  kref_read(&us_ibdev->vf_cnt));
  95
  96                 len += sysfs_emit_at(buf, len, " Per VF:");
  97                 for (res_type = USNIC_VNIC_RES_TYPE_EOL;
  98                      res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++) {
  99                         if (us_ibdev->vf_res_cnt[res_type] == 0)
 100                                 continue;
 101                         len += sysfs_emit_at(buf, len, "%s %d %s",
 102                                              sep,
 103                                              us_ibdev->vf_res_cnt[res_type],
 104                                              usnic_vnic_res_type_to_str(res_type));
 105                         sep = ",";
 106                 }
 107                 len += sysfs_emit_at(buf, len, "\n");
 108         } else {
 109                 len = sysfs_emit(buf, "%s: no VFs\n",
 110                                  dev_name(&us_ibdev->ib_dev.dev));
 111         }
 112
 113         mutex_unlock(&us_ibdev->usdev_lock);
 114
 115         return len;
 116 }
 117 static DEVICE_ATTR_RO(config);
 118
 119 static ssize_t
 120 iface_show(struct device *device, struct device_attribute *attr, char *buf)
 121 {
 122         struct usnic_ib_dev *us_ibdev =
 123                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
 124
 125         return sysfs_emit(buf, "%s\n", netdev_name(us_ibdev->netdev));
 126 }
 127 static DEVICE_ATTR_RO(iface);
 128
 129 static ssize_t
 130 max_vf_show(struct device *device, struct device_attribute *attr, char *buf)
 131 {
 132         struct usnic_ib_dev *us_ibdev =
 133                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
 134
 135         return sysfs_emit(buf, "%u\n", kref_read(&us_ibdev->vf_cnt));
 136 }
 137 static DEVICE_ATTR_RO(max_vf);
 138
 139 static ssize_t
 140 qp_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
 141 {
 142         struct usnic_ib_dev *us_ibdev =
 143                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
 144         int qp_per_vf;
 145
 146         qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
 147                         us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
 148
 149         return sysfs_emit(buf, "%d\n", qp_per_vf);
 150 }
 151 static DEVICE_ATTR_RO(qp_per_vf);
 152
 153 static ssize_t
 154 cq_per_vf_show(struct device *device, struct device_attribute *attr, char *buf)
 155 {
 156         struct usnic_ib_dev *us_ibdev =
 157                 rdma_device_to_drv_device(device, struct usnic_ib_dev, ib_dev);
 158
 159         return sysfs_emit(buf, "%d\n",
 160                           us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]);
 161 }
 162 static DEVICE_ATTR_RO(cq_per_vf);
 163
 164 static struct attribute *usnic_class_attributes[] = {
 165         &dev_attr_board_id.attr,
 166         &dev_attr_config.attr,
 167         &dev_attr_iface.attr,
 168         &dev_attr_max_vf.attr,
 169         &dev_attr_qp_per_vf.attr,
 170         &dev_attr_cq_per_vf.attr,
 171         NULL
 172 };
 173
 174 const struct attribute_group usnic_attr_group = {
 175         .attrs = usnic_class_attributes,
 176 };
 177
 178 struct qpn_attribute {
 179         struct attribute attr;
 180         ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf);
 181 };
 182
 183 /*
 184  * Definitions for supporting QPN entries in sysfs
 185  */
 186 static ssize_t
 187 usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
 188 {
 189         struct usnic_ib_qp_grp *qp_grp;
 190         struct qpn_attribute *qpn_attr;
 191
 192         qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj);
 193         qpn_attr = container_of(attr, struct qpn_attribute, attr);
 194
 195         return qpn_attr->show(qp_grp, buf);
 196 }
 197
 198 static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = {
 199         .show = usnic_ib_qpn_attr_show
 200 };
 201
 202 #define QPN_ATTR_RO(NAME) \
 203 struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME)
 204
 205 static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
 206 {
 207         return sysfs_emit(buf, "0x%p\n", qp_grp->ctx);
 208 }
 209
 210 static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf)
 211 {
 212         int i, j;
 213         struct usnic_vnic_res_chunk *res_chunk;
 214         struct usnic_vnic_res *vnic_res;
 215         int len;
 216
 217         len = sysfs_emit(buf, "QPN: %d State: (%s) PID: %u VF Idx: %hu",
 218                          qp_grp->ibqp.qp_num,
 219                          usnic_ib_qp_grp_state_to_string(qp_grp->state),
 220                          qp_grp->owner_pid,
 221                          usnic_vnic_get_index(qp_grp->vf->vnic));
 222
 223         for (i = 0; qp_grp->res_chunk_list[i]; i++) {
 224                 res_chunk = qp_grp->res_chunk_list[i];
 225                 for (j = 0; j < res_chunk->cnt; j++) {
 226                         vnic_res = res_chunk->res[j];
 227                         len += sysfs_emit_at(buf, len, " %s[%d]",
 228                                 usnic_vnic_res_type_to_str(vnic_res->type),
 229                                 vnic_res->vnic_idx);
 230                 }
 231         }
 232
 233         len += sysfs_emit_at(buf, len, "\n");
 234
 235         return len;
 236 }
 237
 238 static QPN_ATTR_RO(context);
 239 static QPN_ATTR_RO(summary);
 240
 241 static struct attribute *usnic_ib_qpn_default_attrs[] = {
 242         &qpn_attr_context.attr,
 243         &qpn_attr_summary.attr,
 244         NULL
 245 };
 246 ATTRIBUTE_GROUPS(usnic_ib_qpn_default);
 247
 248 static struct kobj_type usnic_ib_qpn_type = {
 249         .sysfs_ops = &usnic_ib_qpn_sysfs_ops,
 250         .default_groups = usnic_ib_qpn_default_groups,
 251 };
 252
 253 int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev)
 254 {
 255         /* create kernel object for looking at individual QPs */
 256         kobject_get(&us_ibdev->ib_dev.dev.kobj);
 257         us_ibdev->qpn_kobj = kobject_create_and_add("qpn",
 258                         &us_ibdev->ib_dev.dev.kobj);
 259         if (us_ibdev->qpn_kobj == NULL) {
 260                 kobject_put(&us_ibdev->ib_dev.dev.kobj);
 261                 return -ENOMEM;
 262         }
 263
 264         return 0;
 265 }
 266
 267 void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev)
 268 {
 269         kobject_put(us_ibdev->qpn_kobj);
 270 }
 271
 272 void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp)
 273 {
 274         struct usnic_ib_dev *us_ibdev;
 275         int err;
 276
 277         us_ibdev = qp_grp->vf->pf;
 278
 279         err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type,
 280                         kobject_get(us_ibdev->qpn_kobj),
 281                         "%d", qp_grp->grp_id);
 282         if (err) {
 283                 kobject_put(us_ibdev->qpn_kobj);
 284                 return;
 285         }
 286 }
 287
 288 void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp)
 289 {
 290         struct usnic_ib_dev *us_ibdev;
 291
 292         us_ibdev = qp_grp->vf->pf;
 293
 294         kobject_put(&qp_grp->kobj);
 295         kobject_put(us_ibdev->qpn_kobj);
 296 }