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 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 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 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 (kref_read(&us_ibdev->vf_cnt) > 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 dev_name(&us_ibdev->ib_dev.dev), 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 kref_read(&us_ibdev->vf_cnt)); 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 dev_name(&us_ibdev->ib_dev.dev)); 122 UPDATE_PTR_LEFT(n, ptr, left); 123 } 124 mutex_unlock(&us_ibdev->usdev_lock); 125 126 return ptr - buf; 127 } 128 static DEVICE_ATTR_RO(config); 129 130 static ssize_t 131 iface_show(struct device *device, struct device_attribute *attr, 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 static DEVICE_ATTR_RO(iface); 141 142 static ssize_t 143 max_vf_show(struct device *device, struct device_attribute *attr, 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 kref_read(&us_ibdev->vf_cnt)); 151 } 152 static DEVICE_ATTR_RO(max_vf); 153 154 static ssize_t 155 qp_per_vf_show(struct device *device, struct device_attribute *attr, 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 static DEVICE_ATTR_RO(qp_per_vf); 168 169 static ssize_t 170 cq_per_vf_show(struct device *device, struct device_attribute *attr, 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 static DEVICE_ATTR_RO(cq_per_vf); 180 181 static struct attribute *usnic_class_attributes[] = { 182 &dev_attr_board_id.attr, 183 &dev_attr_config.attr, 184 &dev_attr_iface.attr, 185 &dev_attr_max_vf.attr, 186 &dev_attr_qp_per_vf.attr, 187 &dev_attr_cq_per_vf.attr, 188 NULL 189 }; 190 191 const struct attribute_group usnic_attr_group = { 192 .attrs = usnic_class_attributes, 193 }; 194 195 struct qpn_attribute { 196 struct attribute attr; 197 ssize_t (*show)(struct usnic_ib_qp_grp *, char *buf); 198 }; 199 200 /* 201 * Definitions for supporting QPN entries in sysfs 202 */ 203 static ssize_t 204 usnic_ib_qpn_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) 205 { 206 struct usnic_ib_qp_grp *qp_grp; 207 struct qpn_attribute *qpn_attr; 208 209 qp_grp = container_of(kobj, struct usnic_ib_qp_grp, kobj); 210 qpn_attr = container_of(attr, struct qpn_attribute, attr); 211 212 return qpn_attr->show(qp_grp, buf); 213 } 214 215 static const struct sysfs_ops usnic_ib_qpn_sysfs_ops = { 216 .show = usnic_ib_qpn_attr_show 217 }; 218 219 #define QPN_ATTR_RO(NAME) \ 220 struct qpn_attribute qpn_attr_##NAME = __ATTR_RO(NAME) 221 222 static ssize_t context_show(struct usnic_ib_qp_grp *qp_grp, char *buf) 223 { 224 return scnprintf(buf, PAGE_SIZE, "0x%p\n", qp_grp->ctx); 225 } 226 227 static ssize_t summary_show(struct usnic_ib_qp_grp *qp_grp, char *buf) 228 { 229 int i, j, n; 230 int left; 231 char *ptr; 232 struct usnic_vnic_res_chunk *res_chunk; 233 struct usnic_vnic_res *vnic_res; 234 235 left = PAGE_SIZE; 236 ptr = buf; 237 238 n = scnprintf(ptr, left, 239 "QPN: %d State: (%s) PID: %u VF Idx: %hu ", 240 qp_grp->ibqp.qp_num, 241 usnic_ib_qp_grp_state_to_string(qp_grp->state), 242 qp_grp->owner_pid, 243 usnic_vnic_get_index(qp_grp->vf->vnic)); 244 UPDATE_PTR_LEFT(n, ptr, left); 245 246 for (i = 0; qp_grp->res_chunk_list[i]; i++) { 247 res_chunk = qp_grp->res_chunk_list[i]; 248 for (j = 0; j < res_chunk->cnt; j++) { 249 vnic_res = res_chunk->res[j]; 250 n = scnprintf(ptr, left, "%s[%d] ", 251 usnic_vnic_res_type_to_str(vnic_res->type), 252 vnic_res->vnic_idx); 253 UPDATE_PTR_LEFT(n, ptr, left); 254 } 255 } 256 257 n = scnprintf(ptr, left, "\n"); 258 UPDATE_PTR_LEFT(n, ptr, left); 259 260 return ptr - buf; 261 } 262 263 static QPN_ATTR_RO(context); 264 static QPN_ATTR_RO(summary); 265 266 static struct attribute *usnic_ib_qpn_default_attrs[] = { 267 &qpn_attr_context.attr, 268 &qpn_attr_summary.attr, 269 NULL 270 }; 271 272 static struct kobj_type usnic_ib_qpn_type = { 273 .sysfs_ops = &usnic_ib_qpn_sysfs_ops, 274 .default_attrs = usnic_ib_qpn_default_attrs 275 }; 276 277 int usnic_ib_sysfs_register_usdev(struct usnic_ib_dev *us_ibdev) 278 { 279 /* create kernel object for looking at individual QPs */ 280 kobject_get(&us_ibdev->ib_dev.dev.kobj); 281 us_ibdev->qpn_kobj = kobject_create_and_add("qpn", 282 &us_ibdev->ib_dev.dev.kobj); 283 if (us_ibdev->qpn_kobj == NULL) { 284 kobject_put(&us_ibdev->ib_dev.dev.kobj); 285 return -ENOMEM; 286 } 287 288 return 0; 289 } 290 291 void usnic_ib_sysfs_unregister_usdev(struct usnic_ib_dev *us_ibdev) 292 { 293 kobject_put(us_ibdev->qpn_kobj); 294 } 295 296 void usnic_ib_sysfs_qpn_add(struct usnic_ib_qp_grp *qp_grp) 297 { 298 struct usnic_ib_dev *us_ibdev; 299 int err; 300 301 us_ibdev = qp_grp->vf->pf; 302 303 err = kobject_init_and_add(&qp_grp->kobj, &usnic_ib_qpn_type, 304 kobject_get(us_ibdev->qpn_kobj), 305 "%d", qp_grp->grp_id); 306 if (err) { 307 kobject_put(us_ibdev->qpn_kobj); 308 return; 309 } 310 } 311 312 void usnic_ib_sysfs_qpn_remove(struct usnic_ib_qp_grp *qp_grp) 313 { 314 struct usnic_ib_dev *us_ibdev; 315 316 us_ibdev = qp_grp->vf->pf; 317 318 kobject_put(&qp_grp->kobj); 319 kobject_put(us_ibdev->qpn_kobj); 320 } 321