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
65static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
66 u32 port_num)
67{
68 return IB_LINK_LAYER_ETHERNET;
69}
70
71static int ocrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
72 struct ib_port_immutable *immutable)
73{
74 struct ib_port_attr attr;
75 struct ocrdma_dev *dev;
76 int err;
77
78 dev = get_ocrdma_dev(ibdev);
79 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
80 if (ocrdma_is_udp_encap_supported(dev))
81 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
82
83 err = ib_query_port(device: ibdev, port_num, port_attr: &attr);
84 if (err)
85 return err;
86
87 immutable->pkey_tbl_len = attr.pkey_tbl_len;
88 immutable->gid_tbl_len = attr.gid_tbl_len;
89 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
90
91 return 0;
92}
93
94static void get_dev_fw_str(struct ib_device *device, char *str)
95{
96 struct ocrdma_dev *dev = get_ocrdma_dev(ibdev: device);
97
98 snprintf(buf: str, IB_FW_VERSION_NAME_MAX, fmt: "%s", &dev->attr.fw_ver[0]);
99}
100
101/* OCRDMA sysfs interface */
102static ssize_t hw_rev_show(struct device *device,
103 struct device_attribute *attr, char *buf)
104{
105 struct ocrdma_dev *dev =
106 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
107
108 return sysfs_emit(buf, fmt: "0x%x\n", dev->nic_info.pdev->vendor);
109}
110static DEVICE_ATTR_RO(hw_rev);
111
112static ssize_t hca_type_show(struct device *device,
113 struct device_attribute *attr, char *buf)
114{
115 struct ocrdma_dev *dev =
116 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
117
118 return sysfs_emit(buf, fmt: "%s\n", &dev->model_number[0]);
119}
120static DEVICE_ATTR_RO(hca_type);
121
122static struct attribute *ocrdma_attributes[] = {
123 &dev_attr_hw_rev.attr,
124 &dev_attr_hca_type.attr,
125 NULL
126};
127
128static const struct attribute_group ocrdma_attr_group = {
129 .attrs = ocrdma_attributes,
130};
131
132static const struct ib_device_ops ocrdma_dev_ops = {
133 .owner = THIS_MODULE,
134 .driver_id = RDMA_DRIVER_OCRDMA,
135 .uverbs_abi_ver = OCRDMA_ABI_VERSION,
136
137 .alloc_mr = ocrdma_alloc_mr,
138 .alloc_pd = ocrdma_alloc_pd,
139 .alloc_ucontext = ocrdma_alloc_ucontext,
140 .create_ah = ocrdma_create_ah,
141 .create_cq = ocrdma_create_cq,
142 .create_qp = ocrdma_create_qp,
143 .create_user_ah = ocrdma_create_ah,
144 .dealloc_pd = ocrdma_dealloc_pd,
145 .dealloc_ucontext = ocrdma_dealloc_ucontext,
146 .dereg_mr = ocrdma_dereg_mr,
147 .destroy_ah = ocrdma_destroy_ah,
148 .destroy_cq = ocrdma_destroy_cq,
149 .destroy_qp = ocrdma_destroy_qp,
150 .device_group = &ocrdma_attr_group,
151 .get_dev_fw_str = get_dev_fw_str,
152 .get_dma_mr = ocrdma_get_dma_mr,
153 .get_link_layer = ocrdma_link_layer,
154 .get_port_immutable = ocrdma_port_immutable,
155 .map_mr_sg = ocrdma_map_mr_sg,
156 .mmap = ocrdma_mmap,
157 .modify_qp = ocrdma_modify_qp,
158 .poll_cq = ocrdma_poll_cq,
159 .post_recv = ocrdma_post_recv,
160 .post_send = ocrdma_post_send,
161 .process_mad = ocrdma_process_mad,
162 .query_ah = ocrdma_query_ah,
163 .query_device = ocrdma_query_device,
164 .query_pkey = ocrdma_query_pkey,
165 .query_port = ocrdma_query_port,
166 .query_qp = ocrdma_query_qp,
167 .reg_user_mr = ocrdma_reg_user_mr,
168 .req_notify_cq = ocrdma_arm_cq,
169 .resize_cq = ocrdma_resize_cq,
170
171 INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah),
172 INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq),
173 INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd),
174 INIT_RDMA_OBJ_SIZE(ib_qp, ocrdma_qp, ibqp),
175 INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext),
176};
177
178static const struct ib_device_ops ocrdma_dev_srq_ops = {
179 .create_srq = ocrdma_create_srq,
180 .destroy_srq = ocrdma_destroy_srq,
181 .modify_srq = ocrdma_modify_srq,
182 .post_srq_recv = ocrdma_post_srq_recv,
183 .query_srq = ocrdma_query_srq,
184
185 INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq),
186};
187
188static int ocrdma_register_device(struct ocrdma_dev *dev)
189{
190 int ret;
191
192 addrconf_addr_eui48(eui: (u8 *)&dev->ibdev.node_guid,
193 addr: dev->nic_info.mac_addr);
194 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
195 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
196 sizeof(OCRDMA_NODE_DESC));
197
198 dev->ibdev.node_type = RDMA_NODE_IB_CA;
199 dev->ibdev.phys_port_cnt = 1;
200 dev->ibdev.num_comp_vectors = dev->eq_cnt;
201
202 /* mandatory to support user space verbs consumer. */
203 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
204
205 ib_set_device_ops(device: &dev->ibdev, ops: &ocrdma_dev_ops);
206
207 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R)
208 ib_set_device_ops(device: &dev->ibdev, ops: &ocrdma_dev_srq_ops);
209
210 ret = ib_device_set_netdev(ib_dev: &dev->ibdev, ndev: dev->nic_info.netdev, port: 1);
211 if (ret)
212 return ret;
213
214 dma_set_max_seg_size(dev: &dev->nic_info.pdev->dev, UINT_MAX);
215 return ib_register_device(device: &dev->ibdev, name: "ocrdma%d",
216 dma_device: &dev->nic_info.pdev->dev);
217}
218
219static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
220{
221 mutex_init(&dev->dev_lock);
222 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
223 GFP_KERNEL);
224 if (!dev->cq_tbl)
225 goto alloc_err;
226
227 if (dev->attr.max_qp) {
228 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
229 sizeof(struct ocrdma_qp *),
230 GFP_KERNEL);
231 if (!dev->qp_tbl)
232 goto alloc_err;
233 }
234
235 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
236 if (dev->stag_arr == NULL)
237 goto alloc_err;
238
239 ocrdma_alloc_pd_pool(dev);
240
241 if (!ocrdma_alloc_stats_resources(dev)) {
242 pr_err("%s: stats resource allocation failed\n", __func__);
243 goto alloc_err;
244 }
245
246 spin_lock_init(&dev->av_tbl.lock);
247 spin_lock_init(&dev->flush_q_lock);
248 return 0;
249alloc_err:
250 pr_err("%s(%d) error.\n", __func__, dev->id);
251 return -ENOMEM;
252}
253
254static void ocrdma_free_resources(struct ocrdma_dev *dev)
255{
256 ocrdma_release_stats_resources(dev);
257 kfree(objp: dev->stag_arr);
258 kfree(objp: dev->qp_tbl);
259 kfree(objp: dev->cq_tbl);
260}
261
262static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
263{
264 int status = 0;
265 u8 lstate = 0;
266 struct ocrdma_dev *dev;
267
268 dev = ib_alloc_device(ocrdma_dev, ibdev);
269 if (!dev) {
270 pr_err("Unable to allocate ib device\n");
271 return NULL;
272 }
273
274 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
275 if (!dev->mbx_cmd)
276 goto init_err;
277
278 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
279 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn);
280 status = ocrdma_init_hw(dev);
281 if (status)
282 goto init_err;
283
284 status = ocrdma_alloc_resources(dev);
285 if (status)
286 goto alloc_err;
287
288 ocrdma_init_service_level(dev);
289 status = ocrdma_register_device(dev);
290 if (status)
291 goto alloc_err;
292
293 /* Query Link state and update */
294 status = ocrdma_mbx_get_link_speed(dev, NULL, lnk_st: &lstate);
295 if (!status)
296 ocrdma_update_link_state(dev, lstate);
297
298 /* Init stats */
299 ocrdma_add_port_stats(dev);
300 /* Interrupt Moderation */
301 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
302 schedule_delayed_work(dwork: &dev->eqd_work, delay: msecs_to_jiffies(m: 1000));
303
304 pr_info("%s %s: %s \"%s\" port %d\n",
305 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
306 port_speed_string(dev), dev->model_number,
307 dev->hba_port_num);
308 pr_info("%s ocrdma%d driver loaded successfully\n",
309 dev_name(&dev->nic_info.pdev->dev), dev->id);
310 return dev;
311
312alloc_err:
313 ocrdma_free_resources(dev);
314 ocrdma_cleanup_hw(dev);
315init_err:
316 kfree(objp: dev->mbx_cmd);
317 ib_dealloc_device(device: &dev->ibdev);
318 pr_err("%s() leaving. ret=%d\n", __func__, status);
319 return NULL;
320}
321
322static void ocrdma_remove_free(struct ocrdma_dev *dev)
323{
324
325 kfree(objp: dev->mbx_cmd);
326 ib_dealloc_device(device: &dev->ibdev);
327}
328
329static void ocrdma_remove(struct ocrdma_dev *dev)
330{
331 /* first unregister with stack to stop all the active traffic
332 * of the registered clients.
333 */
334 cancel_delayed_work_sync(dwork: &dev->eqd_work);
335 ib_unregister_device(device: &dev->ibdev);
336
337 ocrdma_rem_port_stats(dev);
338 ocrdma_free_resources(dev);
339 ocrdma_cleanup_hw(dev);
340 ocrdma_remove_free(dev);
341}
342
343static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
344{
345 struct ib_event port_event;
346
347 port_event.event = IB_EVENT_PORT_ACTIVE;
348 port_event.element.port_num = 1;
349 port_event.device = &dev->ibdev;
350 ib_dispatch_event(event: &port_event);
351 return 0;
352}
353
354static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
355{
356 struct ib_event err_event;
357
358 err_event.event = IB_EVENT_PORT_ERR;
359 err_event.element.port_num = 1;
360 err_event.device = &dev->ibdev;
361 ib_dispatch_event(event: &err_event);
362 return 0;
363}
364
365static void ocrdma_shutdown(struct ocrdma_dev *dev)
366{
367 ocrdma_dispatch_port_error(dev);
368 ocrdma_remove(dev);
369}
370
371/* event handling via NIC driver ensures that all the NIC specific
372 * initialization done before RoCE driver notifies
373 * event to stack.
374 */
375static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
376{
377 switch (event) {
378 case BE_DEV_SHUTDOWN:
379 ocrdma_shutdown(dev);
380 break;
381 default:
382 break;
383 }
384}
385
386void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
387{
388 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
389 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
390 if (!lstate)
391 return;
392 }
393
394 if (!lstate)
395 ocrdma_dispatch_port_error(dev);
396 else
397 ocrdma_dispatch_port_active(dev);
398}
399
400static struct ocrdma_driver ocrdma_drv = {
401 .name = "ocrdma_driver",
402 .add = ocrdma_add,
403 .remove = ocrdma_remove,
404 .state_change_handler = ocrdma_event_handler,
405 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
406};
407
408static int __init ocrdma_init_module(void)
409{
410 int status;
411
412 ocrdma_init_debugfs();
413
414 status = be_roce_register_driver(&ocrdma_drv);
415 if (status)
416 goto err_be_reg;
417
418 return 0;
419
420err_be_reg:
421
422 return status;
423}
424
425static void __exit ocrdma_exit_module(void)
426{
427 be_roce_unregister_driver(&ocrdma_drv);
428 ocrdma_rem_debugfs();
429}
430
431module_init(ocrdma_init_module);
432module_exit(ocrdma_exit_module);
433

source code of linux/drivers/infiniband/hw/ocrdma/ocrdma_main.c