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 #include "usnic_ib_sysfs.h" 49 50 static ssize_t usnic_ib_show_board(struct device *device, 51 struct device_attribute *attr, 52 char *buf) 53 { 54 struct usnic_ib_dev *us_ibdev = 55 container_of(device, struct usnic_ib_dev, ib_dev.dev); 56 unsigned short subsystem_device_id; 57 58 mutex_lock(&us_ibdev->usdev_lock); 59 subsystem_device_id = us_ibdev->pdev->subsystem_device; 60 mutex_unlock(&us_ibdev->usdev_lock); 61 62 return scnprintf(buf, PAGE_SIZE, "%hu\n", subsystem_device_id); 63 } 64 65 /* 66 * Report the configuration for this PF 67 */ 68 static ssize_t 69 usnic_ib_show_config(struct device *device, struct device_attribute *attr, 70 char *buf) 71 { 72 struct usnic_ib_dev *us_ibdev; 73 char *ptr; 74 unsigned left; 75 unsigned n; 76 enum usnic_vnic_res_type res_type; 77 78 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev); 79 80 /* Buffer space limit is 1 page */ 81 ptr = buf; 82 left = PAGE_SIZE; 83 84 mutex_lock(&us_ibdev->usdev_lock); 85 if (kref_read(&us_ibdev->vf_cnt) > 0) { 86 char *busname; 87 88 /* 89 * bus name seems to come with annoying prefix. 90 * Remove it if it is predictable 91 */ 92 busname = us_ibdev->pdev->bus->name; 93 if (strncmp(busname, "PCI Bus ", 8) == 0) 94 busname += 8; 95 96 n = scnprintf(ptr, left, 97 "%s: %s:%d.%d, %s, %pM, %u VFs\n Per VF:", 98 us_ibdev->ib_dev.name, 99 busname, 100 PCI_SLOT(us_ibdev->pdev->devfn), 101 PCI_FUNC(us_ibdev->pdev->devfn), 102 netdev_name(us_ibdev->netdev), 103 us_ibdev->ufdev->mac, 104 kref_read(&us_ibdev->vf_cnt)); 105 UPDATE_PTR_LEFT(n, ptr, left); 106 107 for (res_type = USNIC_VNIC_RES_TYPE_EOL; 108 res_type < USNIC_VNIC_RES_TYPE_MAX; 109 res_type++) { 110 if (us_ibdev->vf_res_cnt[res_type] == 0) 111 continue; 112 n = scnprintf(ptr, left, " %d %s%s", 113 us_ibdev->vf_res_cnt[res_type], 114 usnic_vnic_res_type_to_str(res_type), 115 (res_type < (USNIC_VNIC_RES_TYPE_MAX - 1)) ? 116 "," : ""); 117 UPDATE_PTR_LEFT(n, ptr, left); 118 } 119 n = scnprintf(ptr, left, "\n"); 120 UPDATE_PTR_LEFT(n, ptr, left); 121 } else { 122 n = scnprintf(ptr, left, "%s: no VFs\n", 123 us_ibdev->ib_dev.name); 124 UPDATE_PTR_LEFT(n, ptr, left); 125 } 126 mutex_unlock(&us_ibdev->usdev_lock); 127 128 return ptr - buf; 129 } 130 131 static ssize_t 132 usnic_ib_show_iface(struct device *device, struct device_attribute *attr, 133 char *buf) 134 { 135 struct usnic_ib_dev *us_ibdev; 136 137 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev); 138 139 return scnprintf(buf, PAGE_SIZE, "%s\n", 140 netdev_name(us_ibdev->netdev)); 141 } 142 143 static ssize_t 144 usnic_ib_show_max_vf(struct device *device, struct device_attribute *attr, 145 char *buf) 146 { 147 struct usnic_ib_dev *us_ibdev; 148 149 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev); 150 151 return scnprintf(buf, PAGE_SIZE, "%u\n", 152 kref_read(&us_ibdev->vf_cnt)); 153 } 154 155 static ssize_t 156 usnic_ib_show_qp_per_vf(struct device *device, struct device_attribute *attr, 157 char *buf) 158 { 159 struct usnic_ib_dev *us_ibdev; 160 int qp_per_vf; 161 162 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev); 163 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ], 164 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]); 165 166 return scnprintf(buf, PAGE_SIZE, 167 "%d\n", qp_per_vf); 168 } 169 170 static ssize_t 171 usnic_ib_show_cq_per_vf(struct device *device, struct device_attribute *attr, 172 char *buf) 173 { 174 struct usnic_ib_dev *us_ibdev; 175 176 us_ibdev = container_of(device, struct usnic_ib_dev, ib_dev.dev); 177 178 return scnprintf(buf, PAGE_SIZE, "%d\n", 179 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ]); 180 } 181 182 static DEVICE_ATTR(board_id, S_IRUGO, usnic_ib_show_board, NULL); 183 static DEVICE_ATTR(config, S_IRUGO, usnic_ib_show_config, NULL); 184 static DEVICE_ATTR(iface, S_IRUGO, usnic_ib_show_iface, NULL); 185 static DEVICE_ATTR(max_vf, S_IRUGO, usnic_ib_show_max_vf, NULL); 186 static DEVICE_ATTR(qp_per_vf, S_IRUGO, usnic_ib_show_qp_per_vf, NULL); 187 static DEVICE_ATTR(cq_per_vf, S_IRUGO, usnic_ib_show_cq_per_vf, NULL); 188 189 static struct device_attribute *usnic_class_attributes[] = { 190 &dev_attr_board_id, 191 &dev_attr_config, 192 &dev_attr_iface, 193 &dev_attr_max_vf, 194 &dev_attr_qp_per_vf, 195 &dev_attr_cq_per_vf, 196 }; 197 198 struct qpn_attribute { 199 struct attribute attr; 200 ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf); 201 }; 202 203 /* 204 * Definitions for supporting QPN entries in sysfs 205 */ 206 static ssize_t 207 usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) 208 { 209 struct usnic_ib_qp_grp *qp_grp; 210 struct qpn_attribute *qpn_attr; 211 212 qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj); 213 qpn_attr = container_of(attr, struct qpn_attribute, attr); 214 215 return qpn_attr->show(qp_grp, buf); 216 } 217 218 static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = { 219 .show = usnic_ib_qpn_attr_show 220 }; 221 222 #define QPN_ATTR_RO(NAME) \ 223 struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME) 224 225 static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf) 226 { 227 return scnprintf(buf, PAGE_SIZE, "0x%p\n", qp_grp->ctx); 228 } 229 230 static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf) 231 { 232 int i, j, n; 233 int left; 234 char *ptr; 235 struct usnic_vnic_res_chunk *res_chunk; 236 struct usnic_vnic_res *vnic_res; 237 238 left = PAGE_SIZE; 239 ptr = buf; 240 241 n = scnprintf(ptr, left, 242 "QPN: %d State: (%s) PID: %u VF Idx: %hu ", 243 qp_grp->ibqp.qp_num, 244 usnic_ib_qp_grp_state_to_string(qp_grp->state), 245 qp_grp->owner_pid, 246 usnic_vnic_get_index(qp_grp->vf->vnic)); 247 UPDATE_PTR_LEFT(n, ptr, left); 248 249 for (i = 0; qp_grp->res_chunk_list[i]; i++) { 250 res_chunk = qp_grp->res_chunk_list[i]; 251 for (j = 0; j < res_chunk->cnt; j++) { 252 vnic_res = res_chunk->res[j]; 253 n = scnprintf(ptr, left, "%s[%d] ", 254 usnic_vnic_res_type_to_str(vnic_res->type), 255 vnic_res->vnic_idx); 256 UPDATE_PTR_LEFT(n, ptr, left); 257 } 258 } 259 260 n = scnprintf(ptr, left, "\n"); 261 UPDATE_PTR_LEFT(n, ptr, left); 262 263 return ptr - buf; 264 } 265 266 static QPN_ATTR_RO(context); 267 static QPN_ATTR_RO(summary); 268 269 static struct attribute *usnic_ib_qpn_default_attrs[] = { 270 &qpn_attr_context.attr, 271 &qpn_attr_summary.attr, 272 NULL 273 }; 274 275 static struct kobj_type usnic_ib_qpn_type = { 276 .sysfs_ops = &usnic_ib_qpn_sysfs_ops, 277 .default_attrs = usnic_ib_qpn_default_attrs 278 }; 279 280 int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev) 281 { 282 int i; 283 int err; 284 for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) { 285 err = device_create_file(&us_ibdev->ib_dev.dev, 286 usnic_class_attributes[i]); 287 if (err) { 288 usnic_err("Failed to create device file %d for %s eith err %d", 289 i, us_ibdev->ib_dev.name, err); 290 return -EINVAL; 291 } 292 } 293 294 /* create kernel object for looking at individual QPs */ 295 kobject_get(&us_ibdev->ib_dev.dev.kobj); 296 us_ibdev->qpn_kobj = kobject_create_and_add("qpn", 297 &us_ibdev->ib_dev.dev.kobj); 298 if (us_ibdev->qpn_kobj == NULL) { 299 kobject_put(&us_ibdev->ib_dev.dev.kobj); 300 return -ENOMEM; 301 } 302 303 return 0; 304 } 305 306 void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev) 307 { 308 int i; 309 for (i = 0; i < ARRAY_SIZE(usnic_class_attributes); ++i) { 310 device_remove_file(&us_ibdev->ib_dev.dev, 311 usnic_class_attributes[i]); 312 } 313 314 kobject_put(us_ibdev->qpn_kobj); 315 } 316 317 void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp) 318 { 319 struct usnic_ib_dev *us_ibdev; 320 int err; 321 322 us_ibdev = qp_grp->vf->pf; 323 324 err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type, 325 kobject_get(us_ibdev->qpn_kobj), 326 "%d", qp_grp->grp_id); 327 if (err) { 328 kobject_put(us_ibdev->qpn_kobj); 329 return; 330 } 331 } 332 333 void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp) 334 { 335 struct usnic_ib_dev *us_ibdev; 336 337 us_ibdev = qp_grp->vf->pf; 338 339 kobject_put(&qp_grp->kobj); 340 kobject_put(us_ibdev->qpn_kobj); 341 } 342