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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
61MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
62MODULE_AUTHOR("Emulex Corporation");
63MODULE_LICENSE("Dual BSD/GPL");
64
65void 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}
79static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
80 u8 port_num)
81{
82 return IB_LINK_LAYER_ETHERNET;
83}
84
85static 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
108static 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 */
116static 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}
124static DEVICE_ATTR_RO(hw_rev);
125
126static 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}
134static DEVICE_ATTR_RO(hca_type);
135
136static struct attribute *ocrdma_attributes[] = {
137 &dev_attr_hw_rev.attr,
138 &dev_attr_hca_type.attr,
139 NULL
140};
141
142static const struct attribute_group ocrdma_attr_group = {
143 .attrs = ocrdma_attributes,
144};
145
146static 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
189static 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
199static 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 return ib_register_device(&dev->ibdev, "ocrdma%d");
259}
260
261static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
262{
263 mutex_init(&dev->dev_lock);
264 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
265 GFP_KERNEL);
266 if (!dev->cq_tbl)
267 goto alloc_err;
268
269 if (dev->attr.max_qp) {
270 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
271 sizeof(struct ocrdma_qp *),
272 GFP_KERNEL);
273 if (!dev->qp_tbl)
274 goto alloc_err;
275 }
276
277 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
278 if (dev->stag_arr == NULL)
279 goto alloc_err;
280
281 ocrdma_alloc_pd_pool(dev);
282
283 if (!ocrdma_alloc_stats_resources(dev)) {
284 pr_err("%s: stats resource allocation failed\n", __func__);
285 goto alloc_err;
286 }
287
288 spin_lock_init(&dev->av_tbl.lock);
289 spin_lock_init(&dev->flush_q_lock);
290 return 0;
291alloc_err:
292 pr_err("%s(%d) error.\n", __func__, dev->id);
293 return -ENOMEM;
294}
295
296static void ocrdma_free_resources(struct ocrdma_dev *dev)
297{
298 ocrdma_release_stats_resources(dev);
299 kfree(dev->stag_arr);
300 kfree(dev->qp_tbl);
301 kfree(dev->cq_tbl);
302}
303
304static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
305{
306 int status = 0;
307 u8 lstate = 0;
308 struct ocrdma_dev *dev;
309
310 dev = ib_alloc_device(ocrdma_dev, ibdev);
311 if (!dev) {
312 pr_err("Unable to allocate ib device\n");
313 return NULL;
314 }
315
316 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
317 if (!dev->mbx_cmd)
318 goto init_err;
319
320 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
321 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn);
322 status = ocrdma_init_hw(dev);
323 if (status)
324 goto init_err;
325
326 status = ocrdma_alloc_resources(dev);
327 if (status)
328 goto alloc_err;
329
330 ocrdma_init_service_level(dev);
331 status = ocrdma_register_device(dev);
332 if (status)
333 goto alloc_err;
334
335 /* Query Link state and update */
336 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
337 if (!status)
338 ocrdma_update_link_state(dev, lstate);
339
340 /* Init stats */
341 ocrdma_add_port_stats(dev);
342 /* Interrupt Moderation */
343 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
344 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
345
346 pr_info("%s %s: %s \"%s\" port %d\n",
347 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
348 port_speed_string(dev), dev->model_number,
349 dev->hba_port_num);
350 pr_info("%s ocrdma%d driver loaded successfully\n",
351 dev_name(&dev->nic_info.pdev->dev), dev->id);
352 return dev;
353
354alloc_err:
355 ocrdma_free_resources(dev);
356 ocrdma_cleanup_hw(dev);
357init_err:
358 kfree(dev->mbx_cmd);
359 ib_dealloc_device(&dev->ibdev);
360 pr_err("%s() leaving. ret=%d\n", __func__, status);
361 return NULL;
362}
363
364static void ocrdma_remove_free(struct ocrdma_dev *dev)
365{
366
367 kfree(dev->mbx_cmd);
368 ib_dealloc_device(&dev->ibdev);
369}
370
371static void ocrdma_remove(struct ocrdma_dev *dev)
372{
373 /* first unregister with stack to stop all the active traffic
374 * of the registered clients.
375 */
376 cancel_delayed_work_sync(&dev->eqd_work);
377 ib_unregister_device(&dev->ibdev);
378
379 ocrdma_rem_port_stats(dev);
380 ocrdma_free_resources(dev);
381 ocrdma_cleanup_hw(dev);
382 ocrdma_remove_free(dev);
383}
384
385static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
386{
387 struct ib_event port_event;
388
389 port_event.event = IB_EVENT_PORT_ACTIVE;
390 port_event.element.port_num = 1;
391 port_event.device = &dev->ibdev;
392 ib_dispatch_event(&port_event);
393 return 0;
394}
395
396static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
397{
398 struct ib_event err_event;
399
400 err_event.event = IB_EVENT_PORT_ERR;
401 err_event.element.port_num = 1;
402 err_event.device = &dev->ibdev;
403 ib_dispatch_event(&err_event);
404 return 0;
405}
406
407static void ocrdma_shutdown(struct ocrdma_dev *dev)
408{
409 ocrdma_dispatch_port_error(dev);
410 ocrdma_remove(dev);
411}
412
413/* event handling via NIC driver ensures that all the NIC specific
414 * initialization done before RoCE driver notifies
415 * event to stack.
416 */
417static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
418{
419 switch (event) {
420 case BE_DEV_SHUTDOWN:
421 ocrdma_shutdown(dev);
422 break;
423 default:
424 break;
425 }
426}
427
428void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
429{
430 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
431 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
432 if (!lstate)
433 return;
434 }
435
436 if (!lstate)
437 ocrdma_dispatch_port_error(dev);
438 else
439 ocrdma_dispatch_port_active(dev);
440}
441
442static struct ocrdma_driver ocrdma_drv = {
443 .name = "ocrdma_driver",
444 .add = ocrdma_add,
445 .remove = ocrdma_remove,
446 .state_change_handler = ocrdma_event_handler,
447 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
448};
449
450static int __init ocrdma_init_module(void)
451{
452 int status;
453
454 ocrdma_init_debugfs();
455
456 status = be_roce_register_driver(&ocrdma_drv);
457 if (status)
458 goto err_be_reg;
459
460 return 0;
461
462err_be_reg:
463
464 return status;
465}
466
467static void __exit ocrdma_exit_module(void)
468{
469 be_roce_unregister_driver(&ocrdma_drv);
470 ocrdma_rem_debugfs();
471}
472
473module_init(ocrdma_init_module);
474module_exit(ocrdma_exit_module);