1 /* This file is part of the Emulex RoCE Device Driver for
2 * RoCE (RDMA over Converged Ethernet) adapters.
3 * Copyright (C) 2012-2015 Emulex. All rights reserved.
4 * EMULEX and SLI are trademarks of Emulex.
7 * This software is available to you under a choice of one of two licenses.
8 * You may choose to be licensed under the terms of the GNU General Public
9 * License (GPL) Version 2, available from the file COPYING in the main
10 * directory of this source tree, or the BSD license below:
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * - Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
19 * - Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the distribution.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * Contact Information:
36 * linux-drivers@emulex.com
40 * Costa Mesa, CA 92626
43 #include <linux/module.h>
44 #include <linux/idr.h>
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_user_verbs.h>
47 #include <rdma/ib_addr.h>
48 #include <rdma/ib_mad.h>
50 #include <linux/netdevice.h>
51 #include <net/addrconf.h>
54 #include "ocrdma_verbs.h"
55 #include "ocrdma_ah.h"
57 #include "ocrdma_hw.h"
58 #include "ocrdma_stats.h"
59 #include <rdma/ocrdma-abi.h>
61 MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
62 MODULE_AUTHOR("Emulex Corporation");
63 MODULE_LICENSE("Dual BSD/GPL");
65 static DEFINE_IDR(ocrdma_dev_id);
67 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
71 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
72 guid[0] = mac_addr[0] ^ 2;
73 guid[1] = mac_addr[1];
74 guid[2] = mac_addr[2];
77 guid[5] = mac_addr[3];
78 guid[6] = mac_addr[4];
79 guid[7] = mac_addr[5];
81 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
84 return IB_LINK_LAYER_ETHERNET;
87 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
88 struct ib_port_immutable *immutable)
90 struct ib_port_attr attr;
91 struct ocrdma_dev *dev;
94 dev = get_ocrdma_dev(ibdev);
95 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
96 if (ocrdma_is_udp_encap_supported(dev))
97 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
99 err = ib_query_port(ibdev, port_num, &attr);
103 immutable->pkey_tbl_len = attr.pkey_tbl_len;
104 immutable->gid_tbl_len = attr.gid_tbl_len;
105 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
110 static void get_dev_fw_str(struct ib_device *device, char *str)
112 struct ocrdma_dev *dev = get_ocrdma_dev(device);
114 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]);
117 /* OCRDMA sysfs interface */
118 static ssize_t hw_rev_show(struct device *device,
119 struct device_attribute *attr, char *buf)
121 struct ocrdma_dev *dev = dev_get_drvdata(device);
123 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
125 static DEVICE_ATTR_RO(hw_rev);
127 static ssize_t hca_type_show(struct device *device,
128 struct device_attribute *attr, char *buf)
130 struct ocrdma_dev *dev = dev_get_drvdata(device);
132 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
134 static DEVICE_ATTR_RO(hca_type);
136 static struct attribute *ocrdma_attributes[] = {
137 &dev_attr_hw_rev.attr,
138 &dev_attr_hca_type.attr,
142 static const struct attribute_group ocrdma_attr_group = {
143 .attrs = ocrdma_attributes,
146 static const struct ib_device_ops ocrdma_dev_ops = {
147 .alloc_mr = ocrdma_alloc_mr,
148 .alloc_pd = ocrdma_alloc_pd,
149 .alloc_ucontext = ocrdma_alloc_ucontext,
150 .create_ah = ocrdma_create_ah,
151 .create_cq = ocrdma_create_cq,
152 .create_qp = ocrdma_create_qp,
153 .dealloc_pd = ocrdma_dealloc_pd,
154 .dealloc_ucontext = ocrdma_dealloc_ucontext,
155 .dereg_mr = ocrdma_dereg_mr,
156 .destroy_ah = ocrdma_destroy_ah,
157 .destroy_cq = ocrdma_destroy_cq,
158 .destroy_qp = ocrdma_destroy_qp,
159 .get_dev_fw_str = get_dev_fw_str,
160 .get_dma_mr = ocrdma_get_dma_mr,
161 .get_link_layer = ocrdma_link_layer,
162 .get_netdev = ocrdma_get_netdev,
163 .get_port_immutable = ocrdma_port_immutable,
164 .map_mr_sg = ocrdma_map_mr_sg,
166 .modify_port = ocrdma_modify_port,
167 .modify_qp = ocrdma_modify_qp,
168 .poll_cq = ocrdma_poll_cq,
169 .post_recv = ocrdma_post_recv,
170 .post_send = ocrdma_post_send,
171 .process_mad = ocrdma_process_mad,
172 .query_ah = ocrdma_query_ah,
173 .query_device = ocrdma_query_device,
174 .query_pkey = ocrdma_query_pkey,
175 .query_port = ocrdma_query_port,
176 .query_qp = ocrdma_query_qp,
177 .reg_user_mr = ocrdma_reg_user_mr,
178 .req_notify_cq = ocrdma_arm_cq,
179 .resize_cq = ocrdma_resize_cq,
182 static const struct ib_device_ops ocrdma_dev_srq_ops = {
183 .create_srq = ocrdma_create_srq,
184 .destroy_srq = ocrdma_destroy_srq,
185 .modify_srq = ocrdma_modify_srq,
186 .post_srq_recv = ocrdma_post_srq_recv,
187 .query_srq = ocrdma_query_srq,
190 static int ocrdma_register_device(struct ocrdma_dev *dev)
192 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
193 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
194 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
195 sizeof(OCRDMA_NODE_DESC));
196 dev->ibdev.owner = THIS_MODULE;
197 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
198 dev->ibdev.uverbs_cmd_mask =
199 OCRDMA_UVERBS(GET_CONTEXT) |
200 OCRDMA_UVERBS(QUERY_DEVICE) |
201 OCRDMA_UVERBS(QUERY_PORT) |
202 OCRDMA_UVERBS(ALLOC_PD) |
203 OCRDMA_UVERBS(DEALLOC_PD) |
204 OCRDMA_UVERBS(REG_MR) |
205 OCRDMA_UVERBS(DEREG_MR) |
206 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
207 OCRDMA_UVERBS(CREATE_CQ) |
208 OCRDMA_UVERBS(RESIZE_CQ) |
209 OCRDMA_UVERBS(DESTROY_CQ) |
210 OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
211 OCRDMA_UVERBS(CREATE_QP) |
212 OCRDMA_UVERBS(MODIFY_QP) |
213 OCRDMA_UVERBS(QUERY_QP) |
214 OCRDMA_UVERBS(DESTROY_QP) |
215 OCRDMA_UVERBS(POLL_CQ) |
216 OCRDMA_UVERBS(POST_SEND) |
217 OCRDMA_UVERBS(POST_RECV);
219 dev->ibdev.uverbs_cmd_mask |=
220 OCRDMA_UVERBS(CREATE_AH) |
221 OCRDMA_UVERBS(MODIFY_AH) |
222 OCRDMA_UVERBS(QUERY_AH) |
223 OCRDMA_UVERBS(DESTROY_AH);
225 dev->ibdev.node_type = RDMA_NODE_IB_CA;
226 dev->ibdev.phys_port_cnt = 1;
227 dev->ibdev.num_comp_vectors = dev->eq_cnt;
229 /* mandatory to support user space verbs consumer. */
230 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
232 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops);
234 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
235 dev->ibdev.uverbs_cmd_mask |=
236 OCRDMA_UVERBS(CREATE_SRQ) |
237 OCRDMA_UVERBS(MODIFY_SRQ) |
238 OCRDMA_UVERBS(QUERY_SRQ) |
239 OCRDMA_UVERBS(DESTROY_SRQ) |
240 OCRDMA_UVERBS(POST_SRQ_RECV);
242 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops);
244 rdma_set_device_sysfs_group(&dev->ibdev, &ocrdma_attr_group);
245 dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA;
246 return ib_register_device(&dev->ibdev, "ocrdma%d", NULL);
249 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
251 mutex_init(&dev->dev_lock);
252 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
257 if (dev->attr.max_qp) {
258 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
259 sizeof(struct ocrdma_qp *),
265 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
266 if (dev->stag_arr == NULL)
269 ocrdma_alloc_pd_pool(dev);
271 if (!ocrdma_alloc_stats_resources(dev)) {
272 pr_err("%s: stats resource allocation failed\n", __func__);
276 spin_lock_init(&dev->av_tbl.lock);
277 spin_lock_init(&dev->flush_q_lock);
280 pr_err("%s(%d) error.\n", __func__, dev->id);
284 static void ocrdma_free_resources(struct ocrdma_dev *dev)
286 ocrdma_release_stats_resources(dev);
287 kfree(dev->stag_arr);
292 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
296 struct ocrdma_dev *dev;
298 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
300 pr_err("Unable to allocate ib device\n");
303 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
307 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
308 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
312 status = ocrdma_init_hw(dev);
316 status = ocrdma_alloc_resources(dev);
320 ocrdma_init_service_level(dev);
321 status = ocrdma_register_device(dev);
325 /* Query Link state and update */
326 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
328 ocrdma_update_link_state(dev, lstate);
331 ocrdma_add_port_stats(dev);
332 /* Interrupt Moderation */
333 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
334 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
336 pr_info("%s %s: %s \"%s\" port %d\n",
337 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
338 port_speed_string(dev), dev->model_number,
340 pr_info("%s ocrdma%d driver loaded successfully\n",
341 dev_name(&dev->nic_info.pdev->dev), dev->id);
345 ocrdma_free_resources(dev);
346 ocrdma_cleanup_hw(dev);
348 idr_remove(&ocrdma_dev_id, dev->id);
351 ib_dealloc_device(&dev->ibdev);
352 pr_err("%s() leaving. ret=%d\n", __func__, status);
356 static void ocrdma_remove_free(struct ocrdma_dev *dev)
359 idr_remove(&ocrdma_dev_id, dev->id);
361 ib_dealloc_device(&dev->ibdev);
364 static void ocrdma_remove(struct ocrdma_dev *dev)
366 /* first unregister with stack to stop all the active traffic
367 * of the registered clients.
369 cancel_delayed_work_sync(&dev->eqd_work);
370 ib_unregister_device(&dev->ibdev);
372 ocrdma_rem_port_stats(dev);
373 ocrdma_free_resources(dev);
374 ocrdma_cleanup_hw(dev);
375 ocrdma_remove_free(dev);
378 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
380 struct ib_event port_event;
382 port_event.event = IB_EVENT_PORT_ACTIVE;
383 port_event.element.port_num = 1;
384 port_event.device = &dev->ibdev;
385 ib_dispatch_event(&port_event);
389 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
391 struct ib_event err_event;
393 err_event.event = IB_EVENT_PORT_ERR;
394 err_event.element.port_num = 1;
395 err_event.device = &dev->ibdev;
396 ib_dispatch_event(&err_event);
400 static void ocrdma_shutdown(struct ocrdma_dev *dev)
402 ocrdma_dispatch_port_error(dev);
406 /* event handling via NIC driver ensures that all the NIC specific
407 * initialization done before RoCE driver notifies
410 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
413 case BE_DEV_SHUTDOWN:
414 ocrdma_shutdown(dev);
421 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
423 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
424 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
430 ocrdma_dispatch_port_error(dev);
432 ocrdma_dispatch_port_active(dev);
435 static struct ocrdma_driver ocrdma_drv = {
436 .name = "ocrdma_driver",
438 .remove = ocrdma_remove,
439 .state_change_handler = ocrdma_event_handler,
440 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
443 static int __init ocrdma_init_module(void)
447 ocrdma_init_debugfs();
449 status = be_roce_register_driver(&ocrdma_drv);
460 static void __exit ocrdma_exit_module(void)
462 be_roce_unregister_driver(&ocrdma_drv);
463 ocrdma_rem_debugfs();
464 idr_destroy(&ocrdma_dev_id);
467 module_init(ocrdma_init_module);
468 module_exit(ocrdma_exit_module);