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