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( 228 buf, len, "%s[%d] ", 229 usnic_vnic_res_type_to_str(vnic_res->type), 230 vnic_res->vnic_idx); 231 } 232 } 233 234 len = sysfs_emit_at(buf, len, "\n"); 235 236 return len; 237 } 238 239 static QPN_ATTR_RO(context); 240 static QPN_ATTR_RO(summary); 241 242 static struct attribute *usnic_ib_qpn_default_attrs[] = { 243 &qpn_attr_context.attr, 244 &qpn_attr_summary.attr, 245 NULL 246 }; 247 248 static struct kobj_type usnic_ib_qpn_type = { 249 .sysfs_ops = &usnic_ib_qpn_sysfs_ops, 250 .default_attrs = usnic_ib_qpn_default_attrs 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 } 297