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_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");
66 static DEFINE_IDR(ocrdma_dev_id);
68 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
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];
78 guid[5] = mac_addr[3];
79 guid[6] = mac_addr[4];
80 guid[7] = mac_addr[5];
82 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
85 return IB_LINK_LAYER_ETHERNET;
88 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
89 struct ib_port_immutable *immutable)
91 struct ib_port_attr attr;
92 struct ocrdma_dev *dev;
95 dev = get_ocrdma_dev(ibdev);
96 err = ocrdma_query_port(ibdev, port_num, &attr);
100 immutable->pkey_tbl_len = attr.pkey_tbl_len;
101 immutable->gid_tbl_len = attr.gid_tbl_len;
102 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
103 if (ocrdma_is_udp_encap_supported(dev))
104 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
105 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
110 static void get_dev_fw_str(struct ib_device *device, char *str,
113 struct ocrdma_dev *dev = get_ocrdma_dev(device);
115 snprintf(str, str_len, "%s", &dev->attr.fw_ver[0]);
118 static int ocrdma_register_device(struct ocrdma_dev *dev)
120 strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
121 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
122 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
123 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
124 sizeof(OCRDMA_NODE_DESC));
125 dev->ibdev.owner = THIS_MODULE;
126 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
127 dev->ibdev.uverbs_cmd_mask =
128 OCRDMA_UVERBS(GET_CONTEXT) |
129 OCRDMA_UVERBS(QUERY_DEVICE) |
130 OCRDMA_UVERBS(QUERY_PORT) |
131 OCRDMA_UVERBS(ALLOC_PD) |
132 OCRDMA_UVERBS(DEALLOC_PD) |
133 OCRDMA_UVERBS(REG_MR) |
134 OCRDMA_UVERBS(DEREG_MR) |
135 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
136 OCRDMA_UVERBS(CREATE_CQ) |
137 OCRDMA_UVERBS(RESIZE_CQ) |
138 OCRDMA_UVERBS(DESTROY_CQ) |
139 OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
140 OCRDMA_UVERBS(CREATE_QP) |
141 OCRDMA_UVERBS(MODIFY_QP) |
142 OCRDMA_UVERBS(QUERY_QP) |
143 OCRDMA_UVERBS(DESTROY_QP) |
144 OCRDMA_UVERBS(POLL_CQ) |
145 OCRDMA_UVERBS(POST_SEND) |
146 OCRDMA_UVERBS(POST_RECV);
148 dev->ibdev.uverbs_cmd_mask |=
149 OCRDMA_UVERBS(CREATE_AH) |
150 OCRDMA_UVERBS(MODIFY_AH) |
151 OCRDMA_UVERBS(QUERY_AH) |
152 OCRDMA_UVERBS(DESTROY_AH);
154 dev->ibdev.node_type = RDMA_NODE_IB_CA;
155 dev->ibdev.phys_port_cnt = 1;
156 dev->ibdev.num_comp_vectors = dev->eq_cnt;
158 /* mandatory verbs. */
159 dev->ibdev.query_device = ocrdma_query_device;
160 dev->ibdev.query_port = ocrdma_query_port;
161 dev->ibdev.modify_port = ocrdma_modify_port;
162 dev->ibdev.query_gid = ocrdma_query_gid;
163 dev->ibdev.get_netdev = ocrdma_get_netdev;
164 dev->ibdev.add_gid = ocrdma_add_gid;
165 dev->ibdev.del_gid = ocrdma_del_gid;
166 dev->ibdev.get_link_layer = ocrdma_link_layer;
167 dev->ibdev.alloc_pd = ocrdma_alloc_pd;
168 dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
170 dev->ibdev.create_cq = ocrdma_create_cq;
171 dev->ibdev.destroy_cq = ocrdma_destroy_cq;
172 dev->ibdev.resize_cq = ocrdma_resize_cq;
174 dev->ibdev.create_qp = ocrdma_create_qp;
175 dev->ibdev.modify_qp = ocrdma_modify_qp;
176 dev->ibdev.query_qp = ocrdma_query_qp;
177 dev->ibdev.destroy_qp = ocrdma_destroy_qp;
179 dev->ibdev.query_pkey = ocrdma_query_pkey;
180 dev->ibdev.create_ah = ocrdma_create_ah;
181 dev->ibdev.destroy_ah = ocrdma_destroy_ah;
182 dev->ibdev.query_ah = ocrdma_query_ah;
183 dev->ibdev.modify_ah = ocrdma_modify_ah;
185 dev->ibdev.poll_cq = ocrdma_poll_cq;
186 dev->ibdev.post_send = ocrdma_post_send;
187 dev->ibdev.post_recv = ocrdma_post_recv;
188 dev->ibdev.req_notify_cq = ocrdma_arm_cq;
190 dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
191 dev->ibdev.dereg_mr = ocrdma_dereg_mr;
192 dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
194 dev->ibdev.alloc_mr = ocrdma_alloc_mr;
195 dev->ibdev.map_mr_sg = ocrdma_map_mr_sg;
197 /* mandatory to support user space verbs consumer. */
198 dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
199 dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
200 dev->ibdev.mmap = ocrdma_mmap;
201 dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
203 dev->ibdev.process_mad = ocrdma_process_mad;
204 dev->ibdev.get_port_immutable = ocrdma_port_immutable;
205 dev->ibdev.get_dev_fw_str = get_dev_fw_str;
207 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
208 dev->ibdev.uverbs_cmd_mask |=
209 OCRDMA_UVERBS(CREATE_SRQ) |
210 OCRDMA_UVERBS(MODIFY_SRQ) |
211 OCRDMA_UVERBS(QUERY_SRQ) |
212 OCRDMA_UVERBS(DESTROY_SRQ) |
213 OCRDMA_UVERBS(POST_SRQ_RECV);
215 dev->ibdev.create_srq = ocrdma_create_srq;
216 dev->ibdev.modify_srq = ocrdma_modify_srq;
217 dev->ibdev.query_srq = ocrdma_query_srq;
218 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
219 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
221 return ib_register_device(&dev->ibdev, NULL);
224 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
226 mutex_init(&dev->dev_lock);
227 dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
228 OCRDMA_MAX_CQ, GFP_KERNEL);
232 if (dev->attr.max_qp) {
233 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
234 OCRDMA_MAX_QP, GFP_KERNEL);
239 dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL);
240 if (dev->stag_arr == NULL)
243 ocrdma_alloc_pd_pool(dev);
245 if (!ocrdma_alloc_stats_resources(dev)) {
246 pr_err("%s: stats resource allocation failed\n", __func__);
250 spin_lock_init(&dev->av_tbl.lock);
251 spin_lock_init(&dev->flush_q_lock);
254 pr_err("%s(%d) error.\n", __func__, dev->id);
258 static void ocrdma_free_resources(struct ocrdma_dev *dev)
260 ocrdma_release_stats_resources(dev);
261 kfree(dev->stag_arr);
266 /* OCRDMA sysfs interface */
267 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
270 struct ocrdma_dev *dev = dev_get_drvdata(device);
272 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
275 static ssize_t show_hca_type(struct device *device,
276 struct device_attribute *attr, char *buf)
278 struct ocrdma_dev *dev = dev_get_drvdata(device);
280 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
283 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
284 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
286 static struct device_attribute *ocrdma_attributes[] = {
291 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
295 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
296 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
299 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
303 struct ocrdma_dev *dev;
305 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
307 pr_err("Unable to allocate ib device\n");
310 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
314 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
315 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
319 status = ocrdma_init_hw(dev);
323 status = ocrdma_alloc_resources(dev);
327 ocrdma_init_service_level(dev);
328 status = ocrdma_register_device(dev);
332 /* Query Link state and update */
333 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
335 ocrdma_update_link_state(dev, lstate);
337 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
338 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
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));
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,
350 pr_info("%s ocrdma%d driver loaded successfully\n",
351 dev_name(&dev->nic_info.pdev->dev), dev->id);
355 ocrdma_remove_sysfiles(dev);
357 ocrdma_free_resources(dev);
358 ocrdma_cleanup_hw(dev);
360 idr_remove(&ocrdma_dev_id, dev->id);
363 ib_dealloc_device(&dev->ibdev);
364 pr_err("%s() leaving. ret=%d\n", __func__, status);
368 static void ocrdma_remove_free(struct ocrdma_dev *dev)
371 idr_remove(&ocrdma_dev_id, dev->id);
373 ib_dealloc_device(&dev->ibdev);
376 static void ocrdma_remove(struct ocrdma_dev *dev)
378 /* first unregister with stack to stop all the active traffic
379 * of the registered clients.
381 cancel_delayed_work_sync(&dev->eqd_work);
382 ocrdma_remove_sysfiles(dev);
383 ib_unregister_device(&dev->ibdev);
385 ocrdma_rem_port_stats(dev);
386 ocrdma_free_resources(dev);
387 ocrdma_cleanup_hw(dev);
388 ocrdma_remove_free(dev);
391 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
393 struct ib_event port_event;
395 port_event.event = IB_EVENT_PORT_ACTIVE;
396 port_event.element.port_num = 1;
397 port_event.device = &dev->ibdev;
398 ib_dispatch_event(&port_event);
402 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
404 struct ib_event err_event;
406 err_event.event = IB_EVENT_PORT_ERR;
407 err_event.element.port_num = 1;
408 err_event.device = &dev->ibdev;
409 ib_dispatch_event(&err_event);
413 static void ocrdma_shutdown(struct ocrdma_dev *dev)
415 ocrdma_dispatch_port_error(dev);
419 /* event handling via NIC driver ensures that all the NIC specific
420 * initialization done before RoCE driver notifies
423 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
426 case BE_DEV_SHUTDOWN:
427 ocrdma_shutdown(dev);
434 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
436 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
437 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
443 ocrdma_dispatch_port_error(dev);
445 ocrdma_dispatch_port_active(dev);
448 static struct ocrdma_driver ocrdma_drv = {
449 .name = "ocrdma_driver",
451 .remove = ocrdma_remove,
452 .state_change_handler = ocrdma_event_handler,
453 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
456 static int __init ocrdma_init_module(void)
460 ocrdma_init_debugfs();
462 status = be_roce_register_driver(&ocrdma_drv);
473 static void __exit ocrdma_exit_module(void)
475 be_roce_unregister_driver(&ocrdma_drv);
476 ocrdma_rem_debugfs();
477 idr_destroy(&ocrdma_dev_id);
480 module_init(ocrdma_init_module);
481 module_exit(ocrdma_exit_module);