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