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.
5 * www.emulex.com
6 *
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:
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * - Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
18 *
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.
22 *
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.
34 *
35 * Contact Information:
36 * linux-drivers@emulex.com
37 *
38 * Emulex
39 * 3333 Susan Street
40 * Costa Mesa, CA 92626
41 */
42
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>
49
50 #include <linux/netdevice.h>
51 #include <net/addrconf.h>
52
53 #include "ocrdma.h"
54 #include "ocrdma_verbs.h"
55 #include "ocrdma_ah.h"
56 #include "be_roce.h"
57 #include "ocrdma_hw.h"
58 #include "ocrdma_stats.h"
59 #include <rdma/ocrdma-abi.h>
60
61 MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
62 MODULE_AUTHOR("Emulex Corporation");
63 MODULE_LICENSE("Dual BSD/GPL");
64
ocrdma_get_guid(struct ocrdma_dev * dev,u8 * guid)65 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
66 {
67 u8 mac_addr[6];
68
69 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
70 guid[0] = mac_addr[0] ^ 2;
71 guid[1] = mac_addr[1];
72 guid[2] = mac_addr[2];
73 guid[3] = 0xff;
74 guid[4] = 0xfe;
75 guid[5] = mac_addr[3];
76 guid[6] = mac_addr[4];
77 guid[7] = mac_addr[5];
78 }
ocrdma_link_layer(struct ib_device * device,u8 port_num)79 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
80 u8 port_num)
81 {
82 return IB_LINK_LAYER_ETHERNET;
83 }
84
ocrdma_port_immutable(struct ib_device * ibdev,u8 port_num,struct ib_port_immutable * immutable)85 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
86 struct ib_port_immutable *immutable)
87 {
88 struct ib_port_attr attr;
89 struct ocrdma_dev *dev;
90 int err;
91
92 dev = get_ocrdma_dev(ibdev);
93 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
94 if (ocrdma_is_udp_encap_supported(dev))
95 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
96
97 err = ib_query_port(ibdev, port_num, &attr);
98 if (err)
99 return err;
100
101 immutable->pkey_tbl_len = attr.pkey_tbl_len;
102 immutable->gid_tbl_len = attr.gid_tbl_len;
103 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
104
105 return 0;
106 }
107
get_dev_fw_str(struct ib_device * device,char * str)108 static void get_dev_fw_str(struct ib_device *device, char *str)
109 {
110 struct ocrdma_dev *dev = get_ocrdma_dev(device);
111
112 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]);
113 }
114
115 /* OCRDMA sysfs interface */
hw_rev_show(struct device * device,struct device_attribute * attr,char * buf)116 static ssize_t hw_rev_show(struct device *device,
117 struct device_attribute *attr, char *buf)
118 {
119 struct ocrdma_dev *dev =
120 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
121
122 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
123 }
124 static DEVICE_ATTR_RO(hw_rev);
125
hca_type_show(struct device * device,struct device_attribute * attr,char * buf)126 static ssize_t hca_type_show(struct device *device,
127 struct device_attribute *attr, char *buf)
128 {
129 struct ocrdma_dev *dev =
130 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
131
132 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
133 }
134 static DEVICE_ATTR_RO(hca_type);
135
136 static struct attribute *ocrdma_attributes[] = {
137 &dev_attr_hw_rev.attr,
138 &dev_attr_hca_type.attr,
139 NULL
140 };
141
142 static const struct attribute_group ocrdma_attr_group = {
143 .attrs = ocrdma_attributes,
144 };
145
146 static const struct ib_device_ops ocrdma_dev_ops = {
147 .owner = THIS_MODULE,
148 .driver_id = RDMA_DRIVER_OCRDMA,
149 .uverbs_abi_ver = OCRDMA_ABI_VERSION,
150
151 .alloc_mr = ocrdma_alloc_mr,
152 .alloc_pd = ocrdma_alloc_pd,
153 .alloc_ucontext = ocrdma_alloc_ucontext,
154 .create_ah = ocrdma_create_ah,
155 .create_cq = ocrdma_create_cq,
156 .create_qp = ocrdma_create_qp,
157 .dealloc_pd = ocrdma_dealloc_pd,
158 .dealloc_ucontext = ocrdma_dealloc_ucontext,
159 .dereg_mr = ocrdma_dereg_mr,
160 .destroy_ah = ocrdma_destroy_ah,
161 .destroy_cq = ocrdma_destroy_cq,
162 .destroy_qp = ocrdma_destroy_qp,
163 .get_dev_fw_str = get_dev_fw_str,
164 .get_dma_mr = ocrdma_get_dma_mr,
165 .get_link_layer = ocrdma_link_layer,
166 .get_port_immutable = ocrdma_port_immutable,
167 .map_mr_sg = ocrdma_map_mr_sg,
168 .mmap = ocrdma_mmap,
169 .modify_qp = ocrdma_modify_qp,
170 .poll_cq = ocrdma_poll_cq,
171 .post_recv = ocrdma_post_recv,
172 .post_send = ocrdma_post_send,
173 .process_mad = ocrdma_process_mad,
174 .query_ah = ocrdma_query_ah,
175 .query_device = ocrdma_query_device,
176 .query_pkey = ocrdma_query_pkey,
177 .query_port = ocrdma_query_port,
178 .query_qp = ocrdma_query_qp,
179 .reg_user_mr = ocrdma_reg_user_mr,
180 .req_notify_cq = ocrdma_arm_cq,
181 .resize_cq = ocrdma_resize_cq,
182
183 INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah),
184 INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq),
185 INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd),
186 INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext),
187 };
188
189 static const struct ib_device_ops ocrdma_dev_srq_ops = {
190 .create_srq = ocrdma_create_srq,
191 .destroy_srq = ocrdma_destroy_srq,
192 .modify_srq = ocrdma_modify_srq,
193 .post_srq_recv = ocrdma_post_srq_recv,
194 .query_srq = ocrdma_query_srq,
195
196 INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq),
197 };
198
ocrdma_register_device(struct ocrdma_dev * dev)199 static int ocrdma_register_device(struct ocrdma_dev *dev)
200 {
201 int ret;
202
203 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
204 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
205 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
206 sizeof(OCRDMA_NODE_DESC));
207 dev->ibdev.uverbs_cmd_mask =
208 OCRDMA_UVERBS(GET_CONTEXT) |
209 OCRDMA_UVERBS(QUERY_DEVICE) |
210 OCRDMA_UVERBS(QUERY_PORT) |
211 OCRDMA_UVERBS(ALLOC_PD) |
212 OCRDMA_UVERBS(DEALLOC_PD) |
213 OCRDMA_UVERBS(REG_MR) |
214 OCRDMA_UVERBS(DEREG_MR) |
215 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
216 OCRDMA_UVERBS(CREATE_CQ) |
217 OCRDMA_UVERBS(RESIZE_CQ) |
218 OCRDMA_UVERBS(DESTROY_CQ) |
219 OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
220 OCRDMA_UVERBS(CREATE_QP) |
221 OCRDMA_UVERBS(MODIFY_QP) |
222 OCRDMA_UVERBS(QUERY_QP) |
223 OCRDMA_UVERBS(DESTROY_QP) |
224 OCRDMA_UVERBS(POLL_CQ) |
225 OCRDMA_UVERBS(POST_SEND) |
226 OCRDMA_UVERBS(POST_RECV);
227
228 dev->ibdev.uverbs_cmd_mask |=
229 OCRDMA_UVERBS(CREATE_AH) |
230 OCRDMA_UVERBS(MODIFY_AH) |
231 OCRDMA_UVERBS(QUERY_AH) |
232 OCRDMA_UVERBS(DESTROY_AH);
233
234 dev->ibdev.node_type = RDMA_NODE_IB_CA;
235 dev->ibdev.phys_port_cnt = 1;
236 dev->ibdev.num_comp_vectors = dev->eq_cnt;
237
238 /* mandatory to support user space verbs consumer. */
239 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
240
241 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops);
242
243 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
244 dev->ibdev.uverbs_cmd_mask |=
245 OCRDMA_UVERBS(CREATE_SRQ) |
246 OCRDMA_UVERBS(MODIFY_SRQ) |
247 OCRDMA_UVERBS(QUERY_SRQ) |
248 OCRDMA_UVERBS(DESTROY_SRQ) |
249 OCRDMA_UVERBS(POST_SRQ_RECV);
250
251 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops);
252 }
253 rdma_set_device_sysfs_group(&dev->ibdev, &ocrdma_attr_group);
254 ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1);
255 if (ret)
256 return ret;
257
258 dma_set_max_seg_size(&dev->nic_info.pdev->dev, UINT_MAX);
259 return ib_register_device(&dev->ibdev, "ocrdma%d",
260 &dev->nic_info.pdev->dev);
261 }
262
ocrdma_alloc_resources(struct ocrdma_dev * dev)263 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
264 {
265 mutex_init(&dev->dev_lock);
266 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
267 GFP_KERNEL);
268 if (!dev->cq_tbl)
269 goto alloc_err;
270
271 if (dev->attr.max_qp) {
272 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
273 sizeof(struct ocrdma_qp *),
274 GFP_KERNEL);
275 if (!dev->qp_tbl)
276 goto alloc_err;
277 }
278
279 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
280 if (dev->stag_arr == NULL)
281 goto alloc_err;
282
283 ocrdma_alloc_pd_pool(dev);
284
285 if (!ocrdma_alloc_stats_resources(dev)) {
286 pr_err("%s: stats resource allocation failed\n", __func__);
287 goto alloc_err;
288 }
289
290 spin_lock_init(&dev->av_tbl.lock);
291 spin_lock_init(&dev->flush_q_lock);
292 return 0;
293 alloc_err:
294 pr_err("%s(%d) error.\n", __func__, dev->id);
295 return -ENOMEM;
296 }
297
ocrdma_free_resources(struct ocrdma_dev * dev)298 static void ocrdma_free_resources(struct ocrdma_dev *dev)
299 {
300 ocrdma_release_stats_resources(dev);
301 kfree(dev->stag_arr);
302 kfree(dev->qp_tbl);
303 kfree(dev->cq_tbl);
304 }
305
ocrdma_add(struct be_dev_info * dev_info)306 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
307 {
308 int status = 0;
309 u8 lstate = 0;
310 struct ocrdma_dev *dev;
311
312 dev = ib_alloc_device(ocrdma_dev, ibdev);
313 if (!dev) {
314 pr_err("Unable to allocate ib device\n");
315 return NULL;
316 }
317
318 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
319 if (!dev->mbx_cmd)
320 goto init_err;
321
322 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
323 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn);
324 status = ocrdma_init_hw(dev);
325 if (status)
326 goto init_err;
327
328 status = ocrdma_alloc_resources(dev);
329 if (status)
330 goto alloc_err;
331
332 ocrdma_init_service_level(dev);
333 status = ocrdma_register_device(dev);
334 if (status)
335 goto alloc_err;
336
337 /* Query Link state and update */
338 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
339 if (!status)
340 ocrdma_update_link_state(dev, lstate);
341
342 /* Init stats */
343 ocrdma_add_port_stats(dev);
344 /* Interrupt Moderation */
345 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
346 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
347
348 pr_info("%s %s: %s \"%s\" port %d\n",
349 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
350 port_speed_string(dev), dev->model_number,
351 dev->hba_port_num);
352 pr_info("%s ocrdma%d driver loaded successfully\n",
353 dev_name(&dev->nic_info.pdev->dev), dev->id);
354 return dev;
355
356 alloc_err:
357 ocrdma_free_resources(dev);
358 ocrdma_cleanup_hw(dev);
359 init_err:
360 kfree(dev->mbx_cmd);
361 ib_dealloc_device(&dev->ibdev);
362 pr_err("%s() leaving. ret=%d\n", __func__, status);
363 return NULL;
364 }
365
ocrdma_remove_free(struct ocrdma_dev * dev)366 static void ocrdma_remove_free(struct ocrdma_dev *dev)
367 {
368
369 kfree(dev->mbx_cmd);
370 ib_dealloc_device(&dev->ibdev);
371 }
372
ocrdma_remove(struct ocrdma_dev * dev)373 static void ocrdma_remove(struct ocrdma_dev *dev)
374 {
375 /* first unregister with stack to stop all the active traffic
376 * of the registered clients.
377 */
378 cancel_delayed_work_sync(&dev->eqd_work);
379 ib_unregister_device(&dev->ibdev);
380
381 ocrdma_rem_port_stats(dev);
382 ocrdma_free_resources(dev);
383 ocrdma_cleanup_hw(dev);
384 ocrdma_remove_free(dev);
385 }
386
ocrdma_dispatch_port_active(struct ocrdma_dev * dev)387 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
388 {
389 struct ib_event port_event;
390
391 port_event.event = IB_EVENT_PORT_ACTIVE;
392 port_event.element.port_num = 1;
393 port_event.device = &dev->ibdev;
394 ib_dispatch_event(&port_event);
395 return 0;
396 }
397
ocrdma_dispatch_port_error(struct ocrdma_dev * dev)398 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
399 {
400 struct ib_event err_event;
401
402 err_event.event = IB_EVENT_PORT_ERR;
403 err_event.element.port_num = 1;
404 err_event.device = &dev->ibdev;
405 ib_dispatch_event(&err_event);
406 return 0;
407 }
408
ocrdma_shutdown(struct ocrdma_dev * dev)409 static void ocrdma_shutdown(struct ocrdma_dev *dev)
410 {
411 ocrdma_dispatch_port_error(dev);
412 ocrdma_remove(dev);
413 }
414
415 /* event handling via NIC driver ensures that all the NIC specific
416 * initialization done before RoCE driver notifies
417 * event to stack.
418 */
ocrdma_event_handler(struct ocrdma_dev * dev,u32 event)419 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
420 {
421 switch (event) {
422 case BE_DEV_SHUTDOWN:
423 ocrdma_shutdown(dev);
424 break;
425 default:
426 break;
427 }
428 }
429
ocrdma_update_link_state(struct ocrdma_dev * dev,u8 lstate)430 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
431 {
432 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
433 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
434 if (!lstate)
435 return;
436 }
437
438 if (!lstate)
439 ocrdma_dispatch_port_error(dev);
440 else
441 ocrdma_dispatch_port_active(dev);
442 }
443
444 static struct ocrdma_driver ocrdma_drv = {
445 .name = "ocrdma_driver",
446 .add = ocrdma_add,
447 .remove = ocrdma_remove,
448 .state_change_handler = ocrdma_event_handler,
449 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
450 };
451
ocrdma_init_module(void)452 static int __init ocrdma_init_module(void)
453 {
454 int status;
455
456 ocrdma_init_debugfs();
457
458 status = be_roce_register_driver(&ocrdma_drv);
459 if (status)
460 goto err_be_reg;
461
462 return 0;
463
464 err_be_reg:
465
466 return status;
467 }
468
ocrdma_exit_module(void)469 static void __exit ocrdma_exit_module(void)
470 {
471 be_roce_unregister_driver(&ocrdma_drv);
472 ocrdma_rem_debugfs();
473 }
474
475 module_init(ocrdma_init_module);
476 module_exit(ocrdma_exit_module);
477