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 } 340