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Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / infiniband / hw / usnic / usnic_ib_main.c
CommitLineData
e3cf00d0
UM		 1/*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 *
17 * Author: Upinder Malhi <umalhi@cisco.com>
18 * Author: Anant Deepak <anadeepa@cisco.com>
19 * Author: Cesare Cantu' <cantuc@cisco.com>
20 * Author: Jeff Squyres <jsquyres@cisco.com>
21 * Author: Kiran Thirumalai <kithirum@cisco.com>
22 * Author: Xuyang Wang <xuywang@cisco.com>
23 * Author: Reese Faucette <rfaucett@cisco.com>
24 *
25 */
26
27#include <linux/module.h>
c7845bca 28#include <linux/inetdevice.h>
e3cf00d0
UM		 29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/errno.h>
32#include <linux/pci.h>
33#include <linux/netdevice.h>
34
35#include <rdma/ib_user_verbs.h>
36#include <rdma/ib_addr.h>
37
38#include "usnic_abi.h"
39#include "usnic_common_util.h"
40#include "usnic_ib.h"
41#include "usnic_ib_qp_grp.h"
42#include "usnic_log.h"
43#include "usnic_fwd.h"
44#include "usnic_debugfs.h"
45#include "usnic_ib_verbs.h"
46#include "usnic_transport.h"
47#include "usnic_uiom.h"
48#include "usnic_ib_sysfs.h"
49
50unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR;
51unsigned int usnic_ib_share_vf = 1;
52
53static const char usnic_version[] =
54 DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v"
55 DRV_VERSION " (" DRV_RELDATE ")\n";
56
57static DEFINE_MUTEX(usnic_ib_ibdev_list_lock);
58static LIST_HEAD(usnic_ib_ibdev_list);
59
60/* Callback dump funcs */
61static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz)
62{
63 struct usnic_ib_vf *vf = obj;
64 return scnprintf(buf, buf_sz, "PF: %s ", vf->pf->ib_dev.name);
65}
66/* End callback dump funcs */
67
68static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz)
69{
70 usnic_vnic_dump(vf->vnic, buf, buf_sz, vf,
71 usnic_ib_dump_vf_hdr,
72 usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows);
73}
74
75void usnic_ib_log_vf(struct usnic_ib_vf *vf)
76{
77 char buf[1000];
78 usnic_ib_dump_vf(vf, buf, sizeof(buf));
79 usnic_dbg("%s\n", buf);
80}
81
82/* Start of netdev section */
83static inline const char *usnic_ib_netdev_event_to_string(unsigned long event)
84{
85 const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN",
86 "NETDEV_REBOOT", "NETDEV_CHANGE",
87 "NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU",
88 "NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE",
89 "NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP",
90 "NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE",
91 "NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE",
92 "NETDEV_NOTIFY_PEERS", "NETDEV_JOIN"
93 };
94
95 if (event >= ARRAY_SIZE(event2str))
96 return "UNKNOWN_NETDEV_EVENT";
97 else
98 return event2str[event];
99}
100
101static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
102{
103 struct usnic_ib_ucontext *ctx;
104 struct usnic_ib_qp_grp *qp_grp;
105 enum ib_qp_state cur_state;
106 int status;
107
108 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
109
110 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
111 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
112 cur_state = qp_grp->state;
113 if (cur_state == IB_QPS_INIT ||
114 cur_state == IB_QPS_RTR ||
115 cur_state == IB_QPS_RTS) {
116 status = usnic_ib_qp_grp_modify(qp_grp,
117 IB_QPS_ERR,
118 NULL);
119 if (status) {
120 usnic_err("Failed to transistion qp grp %u from %s to %s\n",
121 qp_grp->grp_id,
122 usnic_ib_qp_grp_state_to_string
123 (cur_state),
124 usnic_ib_qp_grp_state_to_string
125 (IB_QPS_ERR));
126 }
127 }
128 }
129 }
130}
131
132static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
133 unsigned long event)
134{
135 struct net_device *netdev;
136 struct ib_event ib_event;
137
138 memset(&ib_event, 0, sizeof(ib_event));
139
140 mutex_lock(&us_ibdev->usdev_lock);
141 netdev = us_ibdev->netdev;
142 switch (event) {
143 case NETDEV_REBOOT:
144 usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name);
145 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
146 ib_event.event = IB_EVENT_PORT_ERR;
147 ib_event.device = &us_ibdev->ib_dev;
148 ib_event.element.port_num = 1;
149 ib_dispatch_event(&ib_event);
150 break;
151 case NETDEV_UP:
152 case NETDEV_DOWN:
153 case NETDEV_CHANGE:
8af94ac6
UM		 154 if (!us_ibdev->ufdev->link_up &&
155 netif_carrier_ok(netdev)) {
156 usnic_fwd_carrier_up(us_ibdev->ufdev);
e3cf00d0
UM		 157 usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name);
158 ib_event.event = IB_EVENT_PORT_ACTIVE;
159 ib_event.device = &us_ibdev->ib_dev;
160 ib_event.element.port_num = 1;
161 ib_dispatch_event(&ib_event);
8af94ac6
UM		 162 } else if (us_ibdev->ufdev->link_up &&
163 !netif_carrier_ok(netdev)) {
164 usnic_fwd_carrier_down(us_ibdev->ufdev);
e3cf00d0
UM		 165 usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name);
166 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
167 ib_event.event = IB_EVENT_PORT_ERR;
168 ib_event.device = &us_ibdev->ib_dev;
169 ib_event.element.port_num = 1;
170 ib_dispatch_event(&ib_event);
171 } else {
c30392ab 172 usnic_dbg("Ignoring %s on %s\n",
e3cf00d0
UM		 173 usnic_ib_netdev_event_to_string(event),
174 us_ibdev->ib_dev.name);
175 }
176 break;
177 case NETDEV_CHANGEADDR:
8af94ac6
UM		 178 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr,
179 sizeof(us_ibdev->ufdev->mac))) {
c30392ab 180 usnic_dbg("Ignoring addr change on %s\n",
e3cf00d0
UM		 181 us_ibdev->ib_dev.name);
182 } else {
183 usnic_info(" %s old mac: %pM new mac: %pM\n",
184 us_ibdev->ib_dev.name,
8af94ac6 185 us_ibdev->ufdev->mac,
e3cf00d0 186 netdev->dev_addr);
8af94ac6 187 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr);
e3cf00d0
UM		 188 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
189 ib_event.event = IB_EVENT_GID_CHANGE;
190 ib_event.device = &us_ibdev->ib_dev;
191 ib_event.element.port_num = 1;
192 ib_dispatch_event(&ib_event);
193 }
194
195 break;
196 case NETDEV_CHANGEMTU:
8af94ac6 197 if (us_ibdev->ufdev->mtu != netdev->mtu) {
e3cf00d0
UM		 198 usnic_info("MTU Change on %s old: %u new: %u\n",
199 us_ibdev->ib_dev.name,
8af94ac6
UM		 200 us_ibdev->ufdev->mtu, netdev->mtu);
201 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu);
e3cf00d0
UM		 202 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
203 } else {
204 usnic_dbg("Ignoring MTU change on %s\n",
205 us_ibdev->ib_dev.name);
206 }
207 break;
208 default:
c30392ab 209 usnic_dbg("Ignoring event %s on %s",
e3cf00d0
UM		 210 usnic_ib_netdev_event_to_string(event),
211 us_ibdev->ib_dev.name);
212 }
213 mutex_unlock(&us_ibdev->usdev_lock);
214}
215
216static int usnic_ib_netdevice_event(struct notifier_block *notifier,
217 unsigned long event, void *ptr)
218{
219 struct usnic_ib_dev *us_ibdev;
220
221 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
222
223 mutex_lock(&usnic_ib_ibdev_list_lock);
224 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
225 if (us_ibdev->netdev == netdev) {
226 usnic_ib_handle_usdev_event(us_ibdev, event);
227 break;
228 }
229 }
230 mutex_unlock(&usnic_ib_ibdev_list_lock);
231
232 return NOTIFY_DONE;
233}
234
235static struct notifier_block usnic_ib_netdevice_notifier = {
236 .notifier_call = usnic_ib_netdevice_event
237};
238/* End of netdev section */
239
c7845bca
UM		 240/* Start of inet section */
241static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev,
242 unsigned long event, void *ptr)
243{
244 struct in_ifaddr *ifa = ptr;
245 struct ib_event ib_event;
246
247 mutex_lock(&us_ibdev->usdev_lock);
248
249 switch (event) {
250 case NETDEV_DOWN:
251 usnic_info("%s via ip notifiers",
252 usnic_ib_netdev_event_to_string(event));
253 usnic_fwd_del_ipaddr(us_ibdev->ufdev);
254 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
255 ib_event.event = IB_EVENT_GID_CHANGE;
256 ib_event.device = &us_ibdev->ib_dev;
257 ib_event.element.port_num = 1;
258 ib_dispatch_event(&ib_event);
259 break;
260 case NETDEV_UP:
261 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
262 usnic_info("%s via ip notifiers: ip %pI4",
263 usnic_ib_netdev_event_to_string(event),
264 &us_ibdev->ufdev->inaddr);
265 ib_event.event = IB_EVENT_GID_CHANGE;
266 ib_event.device = &us_ibdev->ib_dev;
267 ib_event.element.port_num = 1;
268 ib_dispatch_event(&ib_event);
269 break;
270 default:
c30392ab 271 usnic_info("Ignoring event %s on %s",
c7845bca
UM		 272 usnic_ib_netdev_event_to_string(event),
273 us_ibdev->ib_dev.name);
274 }
275 mutex_unlock(&us_ibdev->usdev_lock);
276
277 return NOTIFY_DONE;
278}
279
280static int usnic_ib_inetaddr_event(struct notifier_block *notifier,
281 unsigned long event, void *ptr)
282{
283 struct usnic_ib_dev *us_ibdev;
284 struct in_ifaddr *ifa = ptr;
285 struct net_device *netdev = ifa->ifa_dev->dev;
286
287 mutex_lock(&usnic_ib_ibdev_list_lock);
288 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
289 if (us_ibdev->netdev == netdev) {
290 usnic_ib_handle_inet_event(us_ibdev, event, ptr);
291 break;
292 }
293 }
294 mutex_unlock(&usnic_ib_ibdev_list_lock);
295
296 return NOTIFY_DONE;
297}
298static struct notifier_block usnic_ib_inetaddr_notifier = {
299 .notifier_call = usnic_ib_inetaddr_event
300};
301/* End of inet section*/
302
e3cf00d0
UM		 303/* Start of PF discovery section */
304static void *usnic_ib_device_add(struct pci_dev *dev)
305{
306 struct usnic_ib_dev *us_ibdev;
307 union ib_gid gid;
c7845bca
UM		 308 struct in_ifaddr *in;
309 struct net_device *netdev;
e3cf00d0
UM		 310
311 usnic_dbg("\n");
c7845bca 312 netdev = pci_get_drvdata(dev);
e3cf00d0
UM		 313
314 us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev));
315 if (IS_ERR_OR_NULL(us_ibdev)) {
316 usnic_err("Device %s context alloc failed\n",
317 netdev_name(pci_get_drvdata(dev)));
318 return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT);
319 }
320
321 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
322 if (IS_ERR_OR_NULL(us_ibdev->ufdev)) {
323 usnic_err("Failed to alloc ufdev for %s with err %ld\n",
324 pci_name(dev), PTR_ERR(us_ibdev->ufdev));
325 goto err_dealloc;
326 }
327
328 mutex_init(&us_ibdev->usdev_lock);
329 INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
330 INIT_LIST_HEAD(&us_ibdev->ctx_list);
331
332 us_ibdev->pdev = dev;
333 us_ibdev->netdev = pci_get_drvdata(dev);
334 us_ibdev->ib_dev.owner = THIS_MODULE;
61f78268 335 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP;
e3cf00d0
UM		 336 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
337 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
338 us_ibdev->ib_dev.dma_device = &dev->dev;
339 us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION;
340 strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX);
341
342 us_ibdev->ib_dev.uverbs_cmd_mask =
343 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
344 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
345 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
346 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
347 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
348 (1ull << IB_USER_VERBS_CMD_REG_MR) |
349 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
350 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
351 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
352 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
353 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
354 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
355 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
356 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
357 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
358 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
359 (1ull << IB_USER_VERBS_CMD_OPEN_QP);
360
361 us_ibdev->ib_dev.query_device = usnic_ib_query_device;
362 us_ibdev->ib_dev.query_port = usnic_ib_query_port;
363 us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey;
364 us_ibdev->ib_dev.query_gid = usnic_ib_query_gid;
365 us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer;
366 us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd;
367 us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd;
368 us_ibdev->ib_dev.create_qp = usnic_ib_create_qp;
369 us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp;
370 us_ibdev->ib_dev.query_qp = usnic_ib_query_qp;
371 us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp;
372 us_ibdev->ib_dev.create_cq = usnic_ib_create_cq;
373 us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq;
374 us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr;
375 us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr;
376 us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext;
377 us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext;
378 us_ibdev->ib_dev.mmap = usnic_ib_mmap;
379 us_ibdev->ib_dev.create_ah = usnic_ib_create_ah;
380 us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah;
381 us_ibdev->ib_dev.post_send = usnic_ib_post_send;
382 us_ibdev->ib_dev.post_recv = usnic_ib_post_recv;
383 us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq;
384 us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq;
385 us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr;
386
387
388 if (ib_register_device(&us_ibdev->ib_dev, NULL))
389 goto err_fwd_dealloc;
390
8af94ac6
UM		 391 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu);
392 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr);
393 if (netif_carrier_ok(us_ibdev->netdev))
394 usnic_fwd_carrier_up(us_ibdev->ufdev);
395
c7845bca
UM		 396 in = ((struct in_device *)(netdev->ip_ptr))->ifa_list;
397 if (in != NULL)
398 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address);
399
400 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr,
401 us_ibdev->ufdev->inaddr, &gid.raw[0]);
e3cf00d0
UM		 402 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
403 sizeof(gid.global.interface_id));
404 kref_init(&us_ibdev->vf_cnt);
405
406 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
407 us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev),
8af94ac6
UM		 408 us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up,
409 us_ibdev->ufdev->mtu);
e3cf00d0
UM		 410 return us_ibdev;
411
412err_fwd_dealloc:
413 usnic_fwd_dev_free(us_ibdev->ufdev);
414err_dealloc:
415 usnic_err("failed -- deallocing device\n");
416 ib_dealloc_device(&us_ibdev->ib_dev);
417 return NULL;
418}
419
420static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
421{
422 usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name);
423 usnic_ib_sysfs_unregister_usdev(us_ibdev);
424 usnic_fwd_dev_free(us_ibdev->ufdev);
425 ib_unregister_device(&us_ibdev->ib_dev);
426 ib_dealloc_device(&us_ibdev->ib_dev);
427}
428
429static void usnic_ib_undiscover_pf(struct kref *kref)
430{
431 struct usnic_ib_dev *us_ibdev, *tmp;
432 struct pci_dev *dev;
433 bool found = false;
434
435 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
436 mutex_lock(&usnic_ib_ibdev_list_lock);
437 list_for_each_entry_safe(us_ibdev, tmp,
438 &usnic_ib_ibdev_list, ib_dev_link) {
439 if (us_ibdev->pdev == dev) {
440 list_del(&us_ibdev->ib_dev_link);
441 usnic_ib_device_remove(us_ibdev);
442 found = true;
443 break;
444 }
445 }
446
447 WARN(!found, "Failed to remove PF %s\n", pci_name(dev));
448
449 mutex_unlock(&usnic_ib_ibdev_list_lock);
450}
451
452static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
453{
454 struct usnic_ib_dev *us_ibdev;
455 struct pci_dev *parent_pci, *vf_pci;
456 int err;
457
458 vf_pci = usnic_vnic_get_pdev(vnic);
459 parent_pci = pci_physfn(vf_pci);
460
461 BUG_ON(!parent_pci);
462
463 mutex_lock(&usnic_ib_ibdev_list_lock);
464 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
465 if (us_ibdev->pdev == parent_pci) {
466 kref_get(&us_ibdev->vf_cnt);
467 goto out;
468 }
469 }
470
471 us_ibdev = usnic_ib_device_add(parent_pci);
472 if (IS_ERR_OR_NULL(us_ibdev)) {
6a54d9f9 473 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT);
e3cf00d0
UM		 474 goto out;
475 }
476
477 err = usnic_ib_sysfs_register_usdev(us_ibdev);
478 if (err) {
479 usnic_ib_device_remove(us_ibdev);
480 us_ibdev = ERR_PTR(err);
481 goto out;
482 }
483
484 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
485out:
486 mutex_unlock(&usnic_ib_ibdev_list_lock);
487 return us_ibdev;
488}
489/* End of PF discovery section */
490
491/* Start of PCI section */
492
493static DEFINE_PCI_DEVICE_TABLE(usnic_ib_pci_ids) = {
494 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
495 {0,}
496};
497
498static int usnic_ib_pci_probe(struct pci_dev *pdev,
499 const struct pci_device_id *id)
500{
501 int err;
502 struct usnic_ib_dev *pf;
503 struct usnic_ib_vf *vf;
504 enum usnic_vnic_res_type res_type;
505
506 vf = kzalloc(sizeof(*vf), GFP_KERNEL);
507 if (!vf)
508 return -ENOMEM;
509
510 err = pci_enable_device(pdev);
511 if (err) {
512 usnic_err("Failed to enable %s with err %d\n",
513 pci_name(pdev), err);
514 goto out_clean_vf;
515 }
516
517 err = pci_request_regions(pdev, DRV_NAME);
518 if (err) {
519 usnic_err("Failed to request region for %s with err %d\n",
520 pci_name(pdev), err);
521 goto out_disable_device;
522 }
523
524 pci_set_master(pdev);
525 pci_set_drvdata(pdev, vf);
526
527 vf->vnic = usnic_vnic_alloc(pdev);
528 if (IS_ERR_OR_NULL(vf->vnic)) {
6a54d9f9 529 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM;
e3cf00d0
UM		 530 usnic_err("Failed to alloc vnic for %s with err %d\n",
531 pci_name(pdev), err);
532 goto out_release_regions;
533 }
534
535 pf = usnic_ib_discover_pf(vf->vnic);
536 if (IS_ERR_OR_NULL(pf)) {
537 usnic_err("Failed to discover pf of vnic %s with err%ld\n",
538 pci_name(pdev), PTR_ERR(pf));
6a54d9f9 539 err = pf ? PTR_ERR(pf) : -EFAULT;
e3cf00d0
UM		 540 goto out_clean_vnic;
541 }
542
543 vf->pf = pf;
544 spin_lock_init(&vf->lock);
545 mutex_lock(&pf->usdev_lock);
546 list_add_tail(&vf->link, &pf->vf_dev_list);
547 /*
548 * Save max settings (will be same for each VF, easier to re-write than
549 * to say "if (!set) { set_values(); set=1; }
550 */
551 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
552 res_type < USNIC_VNIC_RES_TYPE_MAX;
553 res_type++) {
554 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
555 res_type);
556 }
557
558 mutex_unlock(&pf->usdev_lock);
559
560 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
561 pf->ib_dev.name);
562 usnic_ib_log_vf(vf);
563 return 0;
564
565out_clean_vnic:
566 usnic_vnic_free(vf->vnic);
567out_release_regions:
568 pci_set_drvdata(pdev, NULL);
569 pci_clear_master(pdev);
570 pci_release_regions(pdev);
571out_disable_device:
572 pci_disable_device(pdev);
573out_clean_vf:
574 kfree(vf);
575 return err;
576}
577
578static void usnic_ib_pci_remove(struct pci_dev *pdev)
579{
580 struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
581 struct usnic_ib_dev *pf = vf->pf;
582
583 mutex_lock(&pf->usdev_lock);
584 list_del(&vf->link);
585 mutex_unlock(&pf->usdev_lock);
586
587 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
588 usnic_vnic_free(vf->vnic);
589 pci_set_drvdata(pdev, NULL);
590 pci_clear_master(pdev);
591 pci_release_regions(pdev);
592 pci_disable_device(pdev);
593 kfree(vf);
594
595 usnic_info("Removed VF %s\n", pci_name(pdev));
596}
597
598/* PCI driver entry points */
599static struct pci_driver usnic_ib_pci_driver = {
600 .name = DRV_NAME,
601 .id_table = usnic_ib_pci_ids,
602 .probe = usnic_ib_pci_probe,
603 .remove = usnic_ib_pci_remove,
604};
605/* End of PCI section */
606
607/* Start of module section */
608static int __init usnic_ib_init(void)
609{
610 int err;
611
612 printk_once(KERN_INFO "%s", usnic_version);
613
614 err = usnic_uiom_init(DRV_NAME);
615 if (err) {
616 usnic_err("Unable to initalize umem with err %d\n", err);
617 return err;
618 }
619
620 if (pci_register_driver(&usnic_ib_pci_driver)) {
621 usnic_err("Unable to register with PCI\n");
622 goto out_umem_fini;
623 }
624
625 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier);
626 if (err) {
627 usnic_err("Failed to register netdev notifier\n");
628 goto out_pci_unreg;
629 }
630
c7845bca
UM		 631 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
632 if (err) {
633 usnic_err("Failed to register inet addr notifier\n");
634 goto out_unreg_netdev_notifier;
635 }
636
e3cf00d0
UM		 637 err = usnic_transport_init();
638 if (err) {
639 usnic_err("Failed to initialize transport\n");
c7845bca 640 goto out_unreg_inetaddr_notifier;
e3cf00d0
UM		 641 }
642
643 usnic_debugfs_init();
644
645 return 0;
646
c7845bca
UM		 647out_unreg_inetaddr_notifier:
648 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
e3cf00d0
UM		 649out_unreg_netdev_notifier:
650 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
651out_pci_unreg:
652 pci_unregister_driver(&usnic_ib_pci_driver);
653out_umem_fini:
654 usnic_uiom_fini();
655
656 return err;
657}
658
659static void __exit usnic_ib_destroy(void)
660{
661 usnic_dbg("\n");
662 usnic_debugfs_exit();
663 usnic_transport_fini();
c7845bca 664 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
e3cf00d0
UM		 665 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
666 pci_unregister_driver(&usnic_ib_pci_driver);
667 usnic_uiom_fini();
668}
669
670MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
671MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
672MODULE_LICENSE("Dual BSD/GPL");
673MODULE_VERSION(DRV_VERSION);
674module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
675module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
676MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
677MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
678MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
679
680module_init(usnic_ib_init);
681module_exit(usnic_ib_destroy);
682/* End of module section */
Linux kernel - Deliverables
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