1 /*******************************************************************
2 * This file is part of the Emulex RoCE Device Driver for *
3 * RoCE (RDMA over Converged Ethernet) adapters. *
4 * Copyright (C) 2008-2012 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
20 * Contact Information:
21 * linux-drivers@emulex.com
25 * Costa Mesa, CA 92626
26 *******************************************************************/
28 #include <linux/module.h>
29 #include <linux/idr.h>
30 #include <rdma/ib_verbs.h>
31 #include <rdma/ib_user_verbs.h>
32 #include <rdma/ib_addr.h>
34 #include <linux/netdevice.h>
35 #include <net/addrconf.h>
38 #include "ocrdma_verbs.h"
39 #include "ocrdma_ah.h"
41 #include "ocrdma_hw.h"
42 #include "ocrdma_stats.h"
43 #include "ocrdma_abi.h"
45 MODULE_VERSION(OCRDMA_ROCE_DRV_VERSION);
46 MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
47 MODULE_AUTHOR("Emulex Corporation");
48 MODULE_LICENSE("GPL");
50 static LIST_HEAD(ocrdma_dev_list);
51 static DEFINE_SPINLOCK(ocrdma_devlist_lock);
52 static DEFINE_IDR(ocrdma_dev_id);
54 static union ib_gid ocrdma_zero_sgid;
56 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
60 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
61 guid[0] = mac_addr[0] ^ 2;
62 guid[1] = mac_addr[1];
63 guid[2] = mac_addr[2];
66 guid[5] = mac_addr[3];
67 guid[6] = mac_addr[4];
68 guid[7] = mac_addr[5];
71 static bool ocrdma_add_sgid(struct ocrdma_dev *dev, union ib_gid *new_sgid)
76 memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
79 spin_lock_irqsave(&dev->sgid_lock, flags);
80 for (i = 0; i < OCRDMA_MAX_SGID; i++) {
81 if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
82 sizeof(union ib_gid))) {
83 /* found free entry */
84 memcpy(&dev->sgid_tbl[i], new_sgid,
85 sizeof(union ib_gid));
86 spin_unlock_irqrestore(&dev->sgid_lock, flags);
88 } else if (!memcmp(&dev->sgid_tbl[i], new_sgid,
89 sizeof(union ib_gid))) {
90 /* entry already present, no addition is required. */
91 spin_unlock_irqrestore(&dev->sgid_lock, flags);
95 spin_unlock_irqrestore(&dev->sgid_lock, flags);
99 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, union ib_gid *sgid)
106 spin_lock_irqsave(&dev->sgid_lock, flags);
107 /* first is default sgid, which cannot be deleted. */
108 for (i = 1; i < OCRDMA_MAX_SGID; i++) {
109 if (!memcmp(&dev->sgid_tbl[i], sgid, sizeof(union ib_gid))) {
110 /* found matching entry */
111 memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
116 spin_unlock_irqrestore(&dev->sgid_lock, flags);
120 static int ocrdma_addr_event(unsigned long event, struct net_device *netdev,
123 struct ib_event gid_event;
124 struct ocrdma_dev *dev;
126 bool updated = false;
127 bool is_vlan = false;
129 is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
131 netdev = rdma_vlan_dev_real_dev(netdev);
134 list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
135 if (dev->nic_info.netdev == netdev) {
145 mutex_lock(&dev->dev_lock);
148 updated = ocrdma_add_sgid(dev, gid);
151 updated = ocrdma_del_sgid(dev, gid);
157 /* GID table updated, notify the consumers about it */
158 gid_event.device = &dev->ibdev;
159 gid_event.element.port_num = 1;
160 gid_event.event = IB_EVENT_GID_CHANGE;
161 ib_dispatch_event(&gid_event);
163 mutex_unlock(&dev->dev_lock);
167 static int ocrdma_inetaddr_event(struct notifier_block *notifier,
168 unsigned long event, void *ptr)
170 struct in_ifaddr *ifa = ptr;
172 struct net_device *netdev = ifa->ifa_dev->dev;
174 ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid);
175 return ocrdma_addr_event(event, netdev, &gid);
178 static struct notifier_block ocrdma_inetaddr_notifier = {
179 .notifier_call = ocrdma_inetaddr_event
182 #if IS_ENABLED(CONFIG_IPV6)
184 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
185 unsigned long event, void *ptr)
187 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
188 union ib_gid *gid = (union ib_gid *)&ifa->addr;
189 struct net_device *netdev = ifa->idev->dev;
190 return ocrdma_addr_event(event, netdev, gid);
193 static struct notifier_block ocrdma_inet6addr_notifier = {
194 .notifier_call = ocrdma_inet6addr_event
197 #endif /* IPV6 and VLAN */
199 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
202 return IB_LINK_LAYER_ETHERNET;
205 static int ocrdma_register_device(struct ocrdma_dev *dev)
207 strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
208 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
209 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
210 sizeof(OCRDMA_NODE_DESC));
211 dev->ibdev.owner = THIS_MODULE;
212 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
213 dev->ibdev.uverbs_cmd_mask =
214 OCRDMA_UVERBS(GET_CONTEXT) |
215 OCRDMA_UVERBS(QUERY_DEVICE) |
216 OCRDMA_UVERBS(QUERY_PORT) |
217 OCRDMA_UVERBS(ALLOC_PD) |
218 OCRDMA_UVERBS(DEALLOC_PD) |
219 OCRDMA_UVERBS(REG_MR) |
220 OCRDMA_UVERBS(DEREG_MR) |
221 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
222 OCRDMA_UVERBS(CREATE_CQ) |
223 OCRDMA_UVERBS(RESIZE_CQ) |
224 OCRDMA_UVERBS(DESTROY_CQ) |
225 OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
226 OCRDMA_UVERBS(CREATE_QP) |
227 OCRDMA_UVERBS(MODIFY_QP) |
228 OCRDMA_UVERBS(QUERY_QP) |
229 OCRDMA_UVERBS(DESTROY_QP) |
230 OCRDMA_UVERBS(POLL_CQ) |
231 OCRDMA_UVERBS(POST_SEND) |
232 OCRDMA_UVERBS(POST_RECV);
234 dev->ibdev.uverbs_cmd_mask |=
235 OCRDMA_UVERBS(CREATE_AH) |
236 OCRDMA_UVERBS(MODIFY_AH) |
237 OCRDMA_UVERBS(QUERY_AH) |
238 OCRDMA_UVERBS(DESTROY_AH);
240 dev->ibdev.node_type = RDMA_NODE_IB_CA;
241 dev->ibdev.phys_port_cnt = 1;
242 dev->ibdev.num_comp_vectors = 1;
244 /* mandatory verbs. */
245 dev->ibdev.query_device = ocrdma_query_device;
246 dev->ibdev.query_port = ocrdma_query_port;
247 dev->ibdev.modify_port = ocrdma_modify_port;
248 dev->ibdev.query_gid = ocrdma_query_gid;
249 dev->ibdev.get_link_layer = ocrdma_link_layer;
250 dev->ibdev.alloc_pd = ocrdma_alloc_pd;
251 dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
253 dev->ibdev.create_cq = ocrdma_create_cq;
254 dev->ibdev.destroy_cq = ocrdma_destroy_cq;
255 dev->ibdev.resize_cq = ocrdma_resize_cq;
257 dev->ibdev.create_qp = ocrdma_create_qp;
258 dev->ibdev.modify_qp = ocrdma_modify_qp;
259 dev->ibdev.query_qp = ocrdma_query_qp;
260 dev->ibdev.destroy_qp = ocrdma_destroy_qp;
262 dev->ibdev.query_pkey = ocrdma_query_pkey;
263 dev->ibdev.create_ah = ocrdma_create_ah;
264 dev->ibdev.destroy_ah = ocrdma_destroy_ah;
265 dev->ibdev.query_ah = ocrdma_query_ah;
266 dev->ibdev.modify_ah = ocrdma_modify_ah;
268 dev->ibdev.poll_cq = ocrdma_poll_cq;
269 dev->ibdev.post_send = ocrdma_post_send;
270 dev->ibdev.post_recv = ocrdma_post_recv;
271 dev->ibdev.req_notify_cq = ocrdma_arm_cq;
273 dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
274 dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr;
275 dev->ibdev.dereg_mr = ocrdma_dereg_mr;
276 dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
278 dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
279 dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
280 dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;
282 /* mandatory to support user space verbs consumer. */
283 dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
284 dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
285 dev->ibdev.mmap = ocrdma_mmap;
286 dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
288 dev->ibdev.process_mad = ocrdma_process_mad;
290 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
291 dev->ibdev.uverbs_cmd_mask |=
292 OCRDMA_UVERBS(CREATE_SRQ) |
293 OCRDMA_UVERBS(MODIFY_SRQ) |
294 OCRDMA_UVERBS(QUERY_SRQ) |
295 OCRDMA_UVERBS(DESTROY_SRQ) |
296 OCRDMA_UVERBS(POST_SRQ_RECV);
298 dev->ibdev.create_srq = ocrdma_create_srq;
299 dev->ibdev.modify_srq = ocrdma_modify_srq;
300 dev->ibdev.query_srq = ocrdma_query_srq;
301 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
302 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
304 return ib_register_device(&dev->ibdev, NULL);
307 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
309 mutex_init(&dev->dev_lock);
310 dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
311 OCRDMA_MAX_SGID, GFP_KERNEL);
314 spin_lock_init(&dev->sgid_lock);
316 dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
317 OCRDMA_MAX_CQ, GFP_KERNEL);
321 if (dev->attr.max_qp) {
322 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
323 OCRDMA_MAX_QP, GFP_KERNEL);
328 dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL);
329 if (dev->stag_arr == NULL)
332 spin_lock_init(&dev->av_tbl.lock);
333 spin_lock_init(&dev->flush_q_lock);
336 pr_err("%s(%d) error.\n", __func__, dev->id);
340 static void ocrdma_free_resources(struct ocrdma_dev *dev)
342 kfree(dev->stag_arr);
345 kfree(dev->sgid_tbl);
348 /* OCRDMA sysfs interface */
349 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
352 struct ocrdma_dev *dev = dev_get_drvdata(device);
354 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
357 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
360 struct ocrdma_dev *dev = dev_get_drvdata(device);
362 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->attr.fw_ver[0]);
365 static ssize_t show_hca_type(struct device *device,
366 struct device_attribute *attr, char *buf)
368 struct ocrdma_dev *dev = dev_get_drvdata(device);
370 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
373 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
374 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
375 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
377 static struct device_attribute *ocrdma_attributes[] = {
383 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
387 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
388 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
391 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
394 struct ocrdma_dev *dev;
396 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
398 pr_err("Unable to allocate ib device\n");
401 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
405 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
406 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
410 status = ocrdma_init_hw(dev);
414 status = ocrdma_alloc_resources(dev);
418 ocrdma_init_service_level(dev);
419 status = ocrdma_register_device(dev);
423 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
424 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
426 spin_lock(&ocrdma_devlist_lock);
427 list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
428 spin_unlock(&ocrdma_devlist_lock);
430 ocrdma_add_port_stats(dev);
432 pr_info("%s %s: %s \"%s\" port %d\n",
433 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
434 port_speed_string(dev), dev->model_number,
436 pr_info("%s ocrdma%d driver loaded successfully\n",
437 dev_name(&dev->nic_info.pdev->dev), dev->id);
441 ocrdma_remove_sysfiles(dev);
443 ocrdma_free_resources(dev);
444 ocrdma_cleanup_hw(dev);
446 idr_remove(&ocrdma_dev_id, dev->id);
449 ib_dealloc_device(&dev->ibdev);
450 pr_err("%s() leaving. ret=%d\n", __func__, status);
454 static void ocrdma_remove_free(struct rcu_head *rcu)
456 struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
458 idr_remove(&ocrdma_dev_id, dev->id);
460 ib_dealloc_device(&dev->ibdev);
463 static void ocrdma_remove(struct ocrdma_dev *dev)
465 /* first unregister with stack to stop all the active traffic
466 * of the registered clients.
468 ocrdma_rem_port_stats(dev);
469 ocrdma_remove_sysfiles(dev);
471 ib_unregister_device(&dev->ibdev);
473 spin_lock(&ocrdma_devlist_lock);
474 list_del_rcu(&dev->entry);
475 spin_unlock(&ocrdma_devlist_lock);
477 ocrdma_free_resources(dev);
478 ocrdma_cleanup_hw(dev);
480 call_rcu(&dev->rcu, ocrdma_remove_free);
483 static int ocrdma_open(struct ocrdma_dev *dev)
485 struct ib_event port_event;
487 port_event.event = IB_EVENT_PORT_ACTIVE;
488 port_event.element.port_num = 1;
489 port_event.device = &dev->ibdev;
490 ib_dispatch_event(&port_event);
494 static int ocrdma_close(struct ocrdma_dev *dev)
497 struct ocrdma_qp *qp, **cur_qp;
498 struct ib_event err_event;
499 struct ib_qp_attr attrs;
500 int attr_mask = IB_QP_STATE;
502 attrs.qp_state = IB_QPS_ERR;
503 mutex_lock(&dev->dev_lock);
505 cur_qp = dev->qp_tbl;
506 for (i = 0; i < OCRDMA_MAX_QP; i++) {
508 if (qp && qp->ibqp.qp_type != IB_QPT_GSI) {
509 /* change the QP state to ERROR */
510 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
512 err_event.event = IB_EVENT_QP_FATAL;
513 err_event.element.qp = &qp->ibqp;
514 err_event.device = &dev->ibdev;
515 ib_dispatch_event(&err_event);
519 mutex_unlock(&dev->dev_lock);
521 err_event.event = IB_EVENT_PORT_ERR;
522 err_event.element.port_num = 1;
523 err_event.device = &dev->ibdev;
524 ib_dispatch_event(&err_event);
528 static void ocrdma_shutdown(struct ocrdma_dev *dev)
534 /* event handling via NIC driver ensures that all the NIC specific
535 * initialization done before RoCE driver notifies
538 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
547 case BE_DEV_SHUTDOWN:
548 ocrdma_shutdown(dev);
553 static struct ocrdma_driver ocrdma_drv = {
554 .name = "ocrdma_driver",
556 .remove = ocrdma_remove,
557 .state_change_handler = ocrdma_event_handler,
558 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
561 static void ocrdma_unregister_inet6addr_notifier(void)
563 #if IS_ENABLED(CONFIG_IPV6)
564 unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
568 static void ocrdma_unregister_inetaddr_notifier(void)
570 unregister_inetaddr_notifier(&ocrdma_inetaddr_notifier);
573 static int __init ocrdma_init_module(void)
577 ocrdma_init_debugfs();
579 status = register_inetaddr_notifier(&ocrdma_inetaddr_notifier);
583 #if IS_ENABLED(CONFIG_IPV6)
584 status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
589 status = be_roce_register_driver(&ocrdma_drv);
596 ocrdma_unregister_inet6addr_notifier();
598 ocrdma_unregister_inetaddr_notifier();
602 static void __exit ocrdma_exit_module(void)
604 be_roce_unregister_driver(&ocrdma_drv);
605 ocrdma_unregister_inet6addr_notifier();
606 ocrdma_unregister_inetaddr_notifier();
607 ocrdma_rem_debugfs();
610 module_init(ocrdma_init_module);
611 module_exit(ocrdma_exit_module);