1 /*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 * Author: Upinder Malhi <umalhi@cisco.com>
33 * Author: Anant Deepak <anadeepa@cisco.com>
34 * Author: Cesare Cantu' <cantuc@cisco.com>
35 * Author: Jeff Squyres <jsquyres@cisco.com>
36 * Author: Kiran Thirumalai <kithirum@cisco.com>
37 * Author: Xuyang Wang <xuywang@cisco.com>
38 * Author: Reese Faucette <rfaucett@cisco.com>
39 *
40 */
41
42 #include <linux/module.h>
43 #include <linux/inetdevice.h>
44 #include <linux/init.h>
45 #include <linux/slab.h>
46 #include <linux/errno.h>
47 #include <linux/pci.h>
48 #include <linux/netdevice.h>
49
50 #include <rdma/ib_user_verbs.h>
51 #include <rdma/ib_addr.h>
52
53 #include "usnic_abi.h"
54 #include "usnic_common_util.h"
55 #include "usnic_ib.h"
56 #include "usnic_ib_qp_grp.h"
57 #include "usnic_log.h"
58 #include "usnic_fwd.h"
59 #include "usnic_debugfs.h"
60 #include "usnic_ib_verbs.h"
61 #include "usnic_transport.h"
62 #include "usnic_uiom.h"
63 #include "usnic_ib_sysfs.h"
64
65 unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR;
66 unsigned int usnic_ib_share_vf = 1;
67
68 static const char usnic_version[] =
69 DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v"
70 DRV_VERSION " (" DRV_RELDATE ")\n";
71
72 static DEFINE_MUTEX(usnic_ib_ibdev_list_lock);
73 static LIST_HEAD(usnic_ib_ibdev_list);
74
75 /* Callback dump funcs */
usnic_ib_dump_vf_hdr(void * obj,char * buf,int buf_sz)76 static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz)
77 {
78 struct usnic_ib_vf *vf = obj;
79 return scnprintf(buf, buf_sz, "PF: %s ", dev_name(&vf->pf->ib_dev.dev));
80 }
81 /* End callback dump funcs */
82
usnic_ib_dump_vf(struct usnic_ib_vf * vf,char * buf,int buf_sz)83 static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz)
84 {
85 usnic_vnic_dump(vf->vnic, buf, buf_sz, vf,
86 usnic_ib_dump_vf_hdr,
87 usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows);
88 }
89
usnic_ib_log_vf(struct usnic_ib_vf * vf)90 void usnic_ib_log_vf(struct usnic_ib_vf *vf)
91 {
92 char *buf = kzalloc(1000, GFP_KERNEL);
93
94 if (!buf)
95 return;
96
97 usnic_ib_dump_vf(vf, buf, 1000);
98 usnic_dbg("%s\n", buf);
99
100 kfree(buf);
101 }
102
103 /* Start of netdev section */
usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev * us_ibdev)104 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
105 {
106 struct usnic_ib_ucontext *ctx;
107 struct usnic_ib_qp_grp *qp_grp;
108 enum ib_qp_state cur_state;
109 int status;
110
111 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
112
113 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
114 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
115 cur_state = qp_grp->state;
116 if (cur_state == IB_QPS_INIT ||
117 cur_state == IB_QPS_RTR ||
118 cur_state == IB_QPS_RTS) {
119 status = usnic_ib_qp_grp_modify(qp_grp,
120 IB_QPS_ERR,
121 NULL);
122 if (status) {
123 usnic_err("Failed to transition qp grp %u from %s to %s\n",
124 qp_grp->grp_id,
125 usnic_ib_qp_grp_state_to_string
126 (cur_state),
127 usnic_ib_qp_grp_state_to_string
128 (IB_QPS_ERR));
129 }
130 }
131 }
132 }
133 }
134
usnic_ib_handle_usdev_event(struct usnic_ib_dev * us_ibdev,unsigned long event)135 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
136 unsigned long event)
137 {
138 struct net_device *netdev;
139 struct ib_event ib_event;
140
141 memset(&ib_event, 0, sizeof(ib_event));
142
143 mutex_lock(&us_ibdev->usdev_lock);
144 netdev = us_ibdev->netdev;
145 switch (event) {
146 case NETDEV_REBOOT:
147 usnic_info("PF Reset on %s\n", dev_name(&us_ibdev->ib_dev.dev));
148 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
149 ib_event.event = IB_EVENT_PORT_ERR;
150 ib_event.device = &us_ibdev->ib_dev;
151 ib_event.element.port_num = 1;
152 ib_dispatch_event(&ib_event);
153 break;
154 case NETDEV_UP:
155 case NETDEV_DOWN:
156 case NETDEV_CHANGE:
157 if (!us_ibdev->ufdev->link_up &&
158 netif_carrier_ok(netdev)) {
159 usnic_fwd_carrier_up(us_ibdev->ufdev);
160 usnic_info("Link UP on %s\n",
161 dev_name(&us_ibdev->ib_dev.dev));
162 ib_event.event = IB_EVENT_PORT_ACTIVE;
163 ib_event.device = &us_ibdev->ib_dev;
164 ib_event.element.port_num = 1;
165 ib_dispatch_event(&ib_event);
166 } else if (us_ibdev->ufdev->link_up &&
167 !netif_carrier_ok(netdev)) {
168 usnic_fwd_carrier_down(us_ibdev->ufdev);
169 usnic_info("Link DOWN on %s\n",
170 dev_name(&us_ibdev->ib_dev.dev));
171 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
172 ib_event.event = IB_EVENT_PORT_ERR;
173 ib_event.device = &us_ibdev->ib_dev;
174 ib_event.element.port_num = 1;
175 ib_dispatch_event(&ib_event);
176 } else {
177 usnic_dbg("Ignoring %s on %s\n",
178 netdev_cmd_to_name(event),
179 dev_name(&us_ibdev->ib_dev.dev));
180 }
181 break;
182 case NETDEV_CHANGEADDR:
183 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr,
184 sizeof(us_ibdev->ufdev->mac))) {
185 usnic_dbg("Ignoring addr change on %s\n",
186 dev_name(&us_ibdev->ib_dev.dev));
187 } else {
188 usnic_info(" %s old mac: %pM new mac: %pM\n",
189 dev_name(&us_ibdev->ib_dev.dev),
190 us_ibdev->ufdev->mac,
191 netdev->dev_addr);
192 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr);
193 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
194 ib_event.event = IB_EVENT_GID_CHANGE;
195 ib_event.device = &us_ibdev->ib_dev;
196 ib_event.element.port_num = 1;
197 ib_dispatch_event(&ib_event);
198 }
199
200 break;
201 case NETDEV_CHANGEMTU:
202 if (us_ibdev->ufdev->mtu != netdev->mtu) {
203 usnic_info("MTU Change on %s old: %u new: %u\n",
204 dev_name(&us_ibdev->ib_dev.dev),
205 us_ibdev->ufdev->mtu, netdev->mtu);
206 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu);
207 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
208 } else {
209 usnic_dbg("Ignoring MTU change on %s\n",
210 dev_name(&us_ibdev->ib_dev.dev));
211 }
212 break;
213 default:
214 usnic_dbg("Ignoring event %s on %s",
215 netdev_cmd_to_name(event),
216 dev_name(&us_ibdev->ib_dev.dev));
217 }
218 mutex_unlock(&us_ibdev->usdev_lock);
219 }
220
usnic_ib_netdevice_event(struct notifier_block * notifier,unsigned long event,void * ptr)221 static int usnic_ib_netdevice_event(struct notifier_block *notifier,
222 unsigned long event, void *ptr)
223 {
224 struct usnic_ib_dev *us_ibdev;
225 struct ib_device *ibdev;
226
227 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
228
229 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC);
230 if (!ibdev)
231 return NOTIFY_DONE;
232
233 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev);
234 usnic_ib_handle_usdev_event(us_ibdev, event);
235 ib_device_put(ibdev);
236 return NOTIFY_DONE;
237 }
238
239 static struct notifier_block usnic_ib_netdevice_notifier = {
240 .notifier_call = usnic_ib_netdevice_event
241 };
242 /* End of netdev section */
243
244 /* Start of inet section */
usnic_ib_handle_inet_event(struct usnic_ib_dev * us_ibdev,unsigned long event,void * ptr)245 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev,
246 unsigned long event, void *ptr)
247 {
248 struct in_ifaddr *ifa = ptr;
249 struct ib_event ib_event;
250
251 mutex_lock(&us_ibdev->usdev_lock);
252
253 switch (event) {
254 case NETDEV_DOWN:
255 usnic_info("%s via ip notifiers",
256 netdev_cmd_to_name(event));
257 usnic_fwd_del_ipaddr(us_ibdev->ufdev);
258 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
259 ib_event.event = IB_EVENT_GID_CHANGE;
260 ib_event.device = &us_ibdev->ib_dev;
261 ib_event.element.port_num = 1;
262 ib_dispatch_event(&ib_event);
263 break;
264 case NETDEV_UP:
265 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
266 usnic_info("%s via ip notifiers: ip %pI4",
267 netdev_cmd_to_name(event),
268 &us_ibdev->ufdev->inaddr);
269 ib_event.event = IB_EVENT_GID_CHANGE;
270 ib_event.device = &us_ibdev->ib_dev;
271 ib_event.element.port_num = 1;
272 ib_dispatch_event(&ib_event);
273 break;
274 default:
275 usnic_info("Ignoring event %s on %s",
276 netdev_cmd_to_name(event),
277 dev_name(&us_ibdev->ib_dev.dev));
278 }
279 mutex_unlock(&us_ibdev->usdev_lock);
280
281 return NOTIFY_DONE;
282 }
283
usnic_ib_inetaddr_event(struct notifier_block * notifier,unsigned long event,void * ptr)284 static int usnic_ib_inetaddr_event(struct notifier_block *notifier,
285 unsigned long event, void *ptr)
286 {
287 struct usnic_ib_dev *us_ibdev;
288 struct in_ifaddr *ifa = ptr;
289 struct net_device *netdev = ifa->ifa_dev->dev;
290 struct ib_device *ibdev;
291
292 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC);
293 if (!ibdev)
294 return NOTIFY_DONE;
295
296 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev);
297 usnic_ib_handle_inet_event(us_ibdev, event, ptr);
298 ib_device_put(ibdev);
299 return NOTIFY_DONE;
300 }
301 static struct notifier_block usnic_ib_inetaddr_notifier = {
302 .notifier_call = usnic_ib_inetaddr_event
303 };
304 /* End of inet section*/
305
usnic_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)306 static int usnic_port_immutable(struct ib_device *ibdev, u32 port_num,
307 struct ib_port_immutable *immutable)
308 {
309 struct ib_port_attr attr;
310 int err;
311
312 immutable->core_cap_flags = RDMA_CORE_PORT_USNIC;
313
314 err = ib_query_port(ibdev, port_num, &attr);
315 if (err)
316 return err;
317
318 immutable->gid_tbl_len = attr.gid_tbl_len;
319
320 return 0;
321 }
322
usnic_get_dev_fw_str(struct ib_device * device,char * str)323 static void usnic_get_dev_fw_str(struct ib_device *device, char *str)
324 {
325 struct usnic_ib_dev *us_ibdev =
326 container_of(device, struct usnic_ib_dev, ib_dev);
327 struct ethtool_drvinfo info;
328
329 mutex_lock(&us_ibdev->usdev_lock);
330 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
331 mutex_unlock(&us_ibdev->usdev_lock);
332
333 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", info.fw_version);
334 }
335
336 static const struct ib_device_ops usnic_dev_ops = {
337 .owner = THIS_MODULE,
338 .driver_id = RDMA_DRIVER_USNIC,
339 .uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION,
340
341 .alloc_pd = usnic_ib_alloc_pd,
342 .alloc_ucontext = usnic_ib_alloc_ucontext,
343 .create_cq = usnic_ib_create_cq,
344 .create_qp = usnic_ib_create_qp,
345 .dealloc_pd = usnic_ib_dealloc_pd,
346 .dealloc_ucontext = usnic_ib_dealloc_ucontext,
347 .dereg_mr = usnic_ib_dereg_mr,
348 .destroy_cq = usnic_ib_destroy_cq,
349 .destroy_qp = usnic_ib_destroy_qp,
350 .device_group = &usnic_attr_group,
351 .get_dev_fw_str = usnic_get_dev_fw_str,
352 .get_link_layer = usnic_ib_port_link_layer,
353 .get_port_immutable = usnic_port_immutable,
354 .mmap = usnic_ib_mmap,
355 .modify_qp = usnic_ib_modify_qp,
356 .query_device = usnic_ib_query_device,
357 .query_gid = usnic_ib_query_gid,
358 .query_port = usnic_ib_query_port,
359 .query_qp = usnic_ib_query_qp,
360 .reg_user_mr = usnic_ib_reg_mr,
361 INIT_RDMA_OBJ_SIZE(ib_pd, usnic_ib_pd, ibpd),
362 INIT_RDMA_OBJ_SIZE(ib_cq, usnic_ib_cq, ibcq),
363 INIT_RDMA_OBJ_SIZE(ib_qp, usnic_ib_qp_grp, ibqp),
364 INIT_RDMA_OBJ_SIZE(ib_ucontext, usnic_ib_ucontext, ibucontext),
365 };
366
367 /* Start of PF discovery section */
usnic_ib_device_add(struct pci_dev * dev)368 static void *usnic_ib_device_add(struct pci_dev *dev)
369 {
370 struct usnic_ib_dev *us_ibdev;
371 union ib_gid gid;
372 struct in_device *ind;
373 struct net_device *netdev;
374 int ret;
375
376 usnic_dbg("\n");
377 netdev = pci_get_drvdata(dev);
378
379 us_ibdev = ib_alloc_device(usnic_ib_dev, ib_dev);
380 if (!us_ibdev) {
381 usnic_err("Device %s context alloc failed\n",
382 netdev_name(pci_get_drvdata(dev)));
383 return ERR_PTR(-EFAULT);
384 }
385
386 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
387 if (!us_ibdev->ufdev) {
388 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev));
389 goto err_dealloc;
390 }
391
392 mutex_init(&us_ibdev->usdev_lock);
393 INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
394 INIT_LIST_HEAD(&us_ibdev->ctx_list);
395
396 us_ibdev->pdev = dev;
397 us_ibdev->netdev = pci_get_drvdata(dev);
398 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP;
399 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
400 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
401 us_ibdev->ib_dev.dev.parent = &dev->dev;
402
403 ib_set_device_ops(&us_ibdev->ib_dev, &usnic_dev_ops);
404
405 ret = ib_device_set_netdev(&us_ibdev->ib_dev, us_ibdev->netdev, 1);
406 if (ret)
407 goto err_fwd_dealloc;
408
409 dma_set_max_seg_size(&dev->dev, SZ_2G);
410 if (ib_register_device(&us_ibdev->ib_dev, "usnic_%d", &dev->dev))
411 goto err_fwd_dealloc;
412
413 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu);
414 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr);
415 if (netif_carrier_ok(us_ibdev->netdev))
416 usnic_fwd_carrier_up(us_ibdev->ufdev);
417
418 rcu_read_lock();
419 ind = __in_dev_get_rcu(netdev);
420 if (ind) {
421 const struct in_ifaddr *ifa;
422
423 ifa = rcu_dereference(ind->ifa_list);
424 if (ifa)
425 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
426 }
427 rcu_read_unlock();
428
429 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr,
430 us_ibdev->ufdev->inaddr, &gid.raw[0]);
431 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
432 sizeof(gid.global.interface_id));
433 kref_init(&us_ibdev->vf_cnt);
434
435 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
436 dev_name(&us_ibdev->ib_dev.dev),
437 netdev_name(us_ibdev->netdev), us_ibdev->ufdev->mac,
438 us_ibdev->ufdev->link_up, us_ibdev->ufdev->mtu);
439 return us_ibdev;
440
441 err_fwd_dealloc:
442 usnic_fwd_dev_free(us_ibdev->ufdev);
443 err_dealloc:
444 usnic_err("failed -- deallocing device\n");
445 ib_dealloc_device(&us_ibdev->ib_dev);
446 return NULL;
447 }
448
usnic_ib_device_remove(struct usnic_ib_dev * us_ibdev)449 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
450 {
451 usnic_info("Unregistering %s\n", dev_name(&us_ibdev->ib_dev.dev));
452 usnic_ib_sysfs_unregister_usdev(us_ibdev);
453 usnic_fwd_dev_free(us_ibdev->ufdev);
454 ib_unregister_device(&us_ibdev->ib_dev);
455 ib_dealloc_device(&us_ibdev->ib_dev);
456 }
457
usnic_ib_undiscover_pf(struct kref * kref)458 static void usnic_ib_undiscover_pf(struct kref *kref)
459 {
460 struct usnic_ib_dev *us_ibdev, *tmp;
461 struct pci_dev *dev;
462 bool found = false;
463
464 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
465 mutex_lock(&usnic_ib_ibdev_list_lock);
466 list_for_each_entry_safe(us_ibdev, tmp,
467 &usnic_ib_ibdev_list, ib_dev_link) {
468 if (us_ibdev->pdev == dev) {
469 list_del(&us_ibdev->ib_dev_link);
470 found = true;
471 break;
472 }
473 }
474
475
476 mutex_unlock(&usnic_ib_ibdev_list_lock);
477 if (found)
478 usnic_ib_device_remove(us_ibdev);
479 else
480 WARN(1, "Failed to remove PF %s\n", pci_name(dev));
481 }
482
usnic_ib_discover_pf(struct usnic_vnic * vnic)483 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
484 {
485 struct usnic_ib_dev *us_ibdev;
486 struct pci_dev *parent_pci, *vf_pci;
487 int err;
488
489 vf_pci = usnic_vnic_get_pdev(vnic);
490 parent_pci = pci_physfn(vf_pci);
491
492 BUG_ON(!parent_pci);
493
494 mutex_lock(&usnic_ib_ibdev_list_lock);
495 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
496 if (us_ibdev->pdev == parent_pci) {
497 kref_get(&us_ibdev->vf_cnt);
498 goto out;
499 }
500 }
501
502 us_ibdev = usnic_ib_device_add(parent_pci);
503 if (IS_ERR_OR_NULL(us_ibdev)) {
504 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT);
505 goto out;
506 }
507
508 err = usnic_ib_sysfs_register_usdev(us_ibdev);
509 if (err) {
510 usnic_ib_device_remove(us_ibdev);
511 us_ibdev = ERR_PTR(err);
512 goto out;
513 }
514
515 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
516 out:
517 mutex_unlock(&usnic_ib_ibdev_list_lock);
518 return us_ibdev;
519 }
520 /* End of PF discovery section */
521
522 /* Start of PCI section */
523
524 static const struct pci_device_id usnic_ib_pci_ids[] = {
525 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
526 {0,}
527 };
528
usnic_ib_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)529 static int usnic_ib_pci_probe(struct pci_dev *pdev,
530 const struct pci_device_id *id)
531 {
532 int err;
533 struct usnic_ib_dev *pf;
534 struct usnic_ib_vf *vf;
535 enum usnic_vnic_res_type res_type;
536
537 if (!device_iommu_mapped(&pdev->dev)) {
538 usnic_err("IOMMU required but not present or enabled. USNIC QPs will not function w/o enabling IOMMU\n");
539 return -EPERM;
540 }
541
542 vf = kzalloc(sizeof(*vf), GFP_KERNEL);
543 if (!vf)
544 return -ENOMEM;
545
546 err = pci_enable_device(pdev);
547 if (err) {
548 usnic_err("Failed to enable %s with err %d\n",
549 pci_name(pdev), err);
550 goto out_clean_vf;
551 }
552
553 err = pci_request_regions(pdev, DRV_NAME);
554 if (err) {
555 usnic_err("Failed to request region for %s with err %d\n",
556 pci_name(pdev), err);
557 goto out_disable_device;
558 }
559
560 pci_set_master(pdev);
561 pci_set_drvdata(pdev, vf);
562
563 vf->vnic = usnic_vnic_alloc(pdev);
564 if (IS_ERR_OR_NULL(vf->vnic)) {
565 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM;
566 usnic_err("Failed to alloc vnic for %s with err %d\n",
567 pci_name(pdev), err);
568 goto out_release_regions;
569 }
570
571 pf = usnic_ib_discover_pf(vf->vnic);
572 if (IS_ERR_OR_NULL(pf)) {
573 usnic_err("Failed to discover pf of vnic %s with err%ld\n",
574 pci_name(pdev), PTR_ERR(pf));
575 err = pf ? PTR_ERR(pf) : -EFAULT;
576 goto out_clean_vnic;
577 }
578
579 vf->pf = pf;
580 mutex_init(&vf->lock);
581 mutex_lock(&pf->usdev_lock);
582 list_add_tail(&vf->link, &pf->vf_dev_list);
583 /*
584 * Save max settings (will be same for each VF, easier to re-write than
585 * to say "if (!set) { set_values(); set=1; }
586 */
587 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
588 res_type < USNIC_VNIC_RES_TYPE_MAX;
589 res_type++) {
590 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
591 res_type);
592 }
593
594 mutex_unlock(&pf->usdev_lock);
595
596 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
597 dev_name(&pf->ib_dev.dev));
598 usnic_ib_log_vf(vf);
599 return 0;
600
601 out_clean_vnic:
602 usnic_vnic_free(vf->vnic);
603 out_release_regions:
604 pci_set_drvdata(pdev, NULL);
605 pci_release_regions(pdev);
606 out_disable_device:
607 pci_disable_device(pdev);
608 out_clean_vf:
609 kfree(vf);
610 return err;
611 }
612
usnic_ib_pci_remove(struct pci_dev * pdev)613 static void usnic_ib_pci_remove(struct pci_dev *pdev)
614 {
615 struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
616 struct usnic_ib_dev *pf = vf->pf;
617
618 mutex_lock(&pf->usdev_lock);
619 list_del(&vf->link);
620 mutex_unlock(&pf->usdev_lock);
621
622 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
623 usnic_vnic_free(vf->vnic);
624 pci_set_drvdata(pdev, NULL);
625 pci_release_regions(pdev);
626 pci_disable_device(pdev);
627 kfree(vf);
628
629 usnic_info("Removed VF %s\n", pci_name(pdev));
630 }
631
632 /* PCI driver entry points */
633 static struct pci_driver usnic_ib_pci_driver = {
634 .name = DRV_NAME,
635 .id_table = usnic_ib_pci_ids,
636 .probe = usnic_ib_pci_probe,
637 .remove = usnic_ib_pci_remove,
638 };
639 /* End of PCI section */
640
641 /* Start of module section */
usnic_ib_init(void)642 static int __init usnic_ib_init(void)
643 {
644 int err;
645
646 printk_once(KERN_INFO "%s", usnic_version);
647
648 err = pci_register_driver(&usnic_ib_pci_driver);
649 if (err) {
650 usnic_err("Unable to register with PCI\n");
651 goto out_umem_fini;
652 }
653
654 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier);
655 if (err) {
656 usnic_err("Failed to register netdev notifier\n");
657 goto out_pci_unreg;
658 }
659
660 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
661 if (err) {
662 usnic_err("Failed to register inet addr notifier\n");
663 goto out_unreg_netdev_notifier;
664 }
665
666 err = usnic_transport_init();
667 if (err) {
668 usnic_err("Failed to initialize transport\n");
669 goto out_unreg_inetaddr_notifier;
670 }
671
672 usnic_debugfs_init();
673
674 return 0;
675
676 out_unreg_inetaddr_notifier:
677 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
678 out_unreg_netdev_notifier:
679 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
680 out_pci_unreg:
681 pci_unregister_driver(&usnic_ib_pci_driver);
682 out_umem_fini:
683
684 return err;
685 }
686
usnic_ib_destroy(void)687 static void __exit usnic_ib_destroy(void)
688 {
689 usnic_dbg("\n");
690 usnic_debugfs_exit();
691 usnic_transport_fini();
692 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
693 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
694 pci_unregister_driver(&usnic_ib_pci_driver);
695 }
696
697 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
698 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
699 MODULE_LICENSE("Dual BSD/GPL");
700 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
701 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
702 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
703 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
704 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
705
706 module_init(usnic_ib_init);
707 module_exit(usnic_ib_destroy);
708 /* End of module section */
709