2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/file.h>
39 #include <asm/uaccess.h>
43 static struct lock_class_key pd_lock_key;
44 static struct lock_class_key mr_lock_key;
45 static struct lock_class_key cq_lock_key;
46 static struct lock_class_key qp_lock_key;
47 static struct lock_class_key ah_lock_key;
48 static struct lock_class_key srq_lock_key;
50 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
52 (udata)->inbuf = (void __user *) (ibuf); \
53 (udata)->outbuf = (void __user *) (obuf); \
54 (udata)->inlen = (ilen); \
55 (udata)->outlen = (olen); \
59 * The ib_uobject locking scheme is as follows:
61 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
62 * needs to be held during all idr operations. When an object is
63 * looked up, a reference must be taken on the object's kref before
66 * - Each object also has an rwsem. This rwsem must be held for
67 * reading while an operation that uses the object is performed.
68 * For example, while registering an MR, the associated PD's
69 * uobject.mutex must be held for reading. The rwsem must be held
70 * for writing while initializing or destroying an object.
72 * - In addition, each object has a "live" flag. If this flag is not
73 * set, then lookups of the object will fail even if it is found in
74 * the idr. This handles a reader that blocks and does not acquire
75 * the rwsem until after the object is destroyed. The destroy
76 * operation will set the live flag to 0 and then drop the rwsem;
77 * this will allow the reader to acquire the rwsem, see that the
78 * live flag is 0, and then drop the rwsem and its reference to
79 * object. The underlying storage will not be freed until the last
80 * reference to the object is dropped.
83 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
84 struct ib_ucontext *context, struct lock_class_key *key)
86 uobj->user_handle = user_handle;
87 uobj->context = context;
88 kref_init(&uobj->ref);
89 init_rwsem(&uobj->mutex);
90 lockdep_set_class(&uobj->mutex, key);
94 static void release_uobj(struct kref *kref)
96 kfree(container_of(kref, struct ib_uobject, ref));
99 static void put_uobj(struct ib_uobject *uobj)
101 kref_put(&uobj->ref, release_uobj);
104 static void put_uobj_read(struct ib_uobject *uobj)
106 up_read(&uobj->mutex);
110 static void put_uobj_write(struct ib_uobject *uobj)
112 up_write(&uobj->mutex);
116 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
121 if (!idr_pre_get(idr, GFP_KERNEL))
124 spin_lock(&ib_uverbs_idr_lock);
125 ret = idr_get_new(idr, uobj, &uobj->id);
126 spin_unlock(&ib_uverbs_idr_lock);
134 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 spin_lock(&ib_uverbs_idr_lock);
137 idr_remove(idr, uobj->id);
138 spin_unlock(&ib_uverbs_idr_lock);
141 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
142 struct ib_ucontext *context)
144 struct ib_uobject *uobj;
146 spin_lock(&ib_uverbs_idr_lock);
147 uobj = idr_find(idr, id);
149 if (uobj->context == context)
150 kref_get(&uobj->ref);
154 spin_unlock(&ib_uverbs_idr_lock);
159 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
160 struct ib_ucontext *context, int nested)
162 struct ib_uobject *uobj;
164 uobj = __idr_get_uobj(idr, id, context);
169 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 down_read(&uobj->mutex);
180 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
181 struct ib_ucontext *context)
183 struct ib_uobject *uobj;
185 uobj = __idr_get_uobj(idr, id, context);
189 down_write(&uobj->mutex);
191 put_uobj_write(uobj);
198 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
201 struct ib_uobject *uobj;
203 uobj = idr_read_uobj(idr, id, context, nested);
204 return uobj ? uobj->object : NULL;
207 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
212 static void put_pd_read(struct ib_pd *pd)
214 put_uobj_read(pd->uobject);
217 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
222 static void put_cq_read(struct ib_cq *cq)
224 put_uobj_read(cq->uobject);
227 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
232 static void put_ah_read(struct ib_ah *ah)
234 put_uobj_read(ah->uobject);
237 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
242 static void put_qp_read(struct ib_qp *qp)
244 put_uobj_read(qp->uobject);
247 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
249 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
252 static void put_srq_read(struct ib_srq *srq)
254 put_uobj_read(srq->uobject);
257 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
258 const char __user *buf,
259 int in_len, int out_len)
261 struct ib_uverbs_get_context cmd;
262 struct ib_uverbs_get_context_resp resp;
263 struct ib_udata udata;
264 struct ib_device *ibdev = file->device->ib_dev;
265 struct ib_ucontext *ucontext;
269 if (out_len < sizeof resp)
272 if (copy_from_user(&cmd, buf, sizeof cmd))
275 mutex_lock(&file->mutex);
277 if (file->ucontext) {
282 INIT_UDATA(&udata, buf + sizeof cmd,
283 (unsigned long) cmd.response + sizeof resp,
284 in_len - sizeof cmd, out_len - sizeof resp);
286 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
287 if (IS_ERR(ucontext)) {
288 ret = PTR_ERR(ucontext);
292 ucontext->device = ibdev;
293 INIT_LIST_HEAD(&ucontext->pd_list);
294 INIT_LIST_HEAD(&ucontext->mr_list);
295 INIT_LIST_HEAD(&ucontext->mw_list);
296 INIT_LIST_HEAD(&ucontext->cq_list);
297 INIT_LIST_HEAD(&ucontext->qp_list);
298 INIT_LIST_HEAD(&ucontext->srq_list);
299 INIT_LIST_HEAD(&ucontext->ah_list);
300 ucontext->closing = 0;
302 resp.num_comp_vectors = file->device->num_comp_vectors;
304 ret = get_unused_fd();
309 filp = ib_uverbs_alloc_event_file(file, 1);
315 if (copy_to_user((void __user *) (unsigned long) cmd.response,
316 &resp, sizeof resp)) {
321 file->async_file = filp->private_data;
323 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
324 ib_uverbs_event_handler);
325 ret = ib_register_event_handler(&file->event_handler);
329 kref_get(&file->async_file->ref);
330 kref_get(&file->ref);
331 file->ucontext = ucontext;
333 fd_install(resp.async_fd, filp);
335 mutex_unlock(&file->mutex);
343 put_unused_fd(resp.async_fd);
346 ibdev->dealloc_ucontext(ucontext);
349 mutex_unlock(&file->mutex);
353 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
354 const char __user *buf,
355 int in_len, int out_len)
357 struct ib_uverbs_query_device cmd;
358 struct ib_uverbs_query_device_resp resp;
359 struct ib_device_attr attr;
362 if (out_len < sizeof resp)
365 if (copy_from_user(&cmd, buf, sizeof cmd))
368 ret = ib_query_device(file->device->ib_dev, &attr);
372 memset(&resp, 0, sizeof resp);
374 resp.fw_ver = attr.fw_ver;
375 resp.node_guid = file->device->ib_dev->node_guid;
376 resp.sys_image_guid = attr.sys_image_guid;
377 resp.max_mr_size = attr.max_mr_size;
378 resp.page_size_cap = attr.page_size_cap;
379 resp.vendor_id = attr.vendor_id;
380 resp.vendor_part_id = attr.vendor_part_id;
381 resp.hw_ver = attr.hw_ver;
382 resp.max_qp = attr.max_qp;
383 resp.max_qp_wr = attr.max_qp_wr;
384 resp.device_cap_flags = attr.device_cap_flags;
385 resp.max_sge = attr.max_sge;
386 resp.max_sge_rd = attr.max_sge_rd;
387 resp.max_cq = attr.max_cq;
388 resp.max_cqe = attr.max_cqe;
389 resp.max_mr = attr.max_mr;
390 resp.max_pd = attr.max_pd;
391 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
392 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
393 resp.max_res_rd_atom = attr.max_res_rd_atom;
394 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
395 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
396 resp.atomic_cap = attr.atomic_cap;
397 resp.max_ee = attr.max_ee;
398 resp.max_rdd = attr.max_rdd;
399 resp.max_mw = attr.max_mw;
400 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
401 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
402 resp.max_mcast_grp = attr.max_mcast_grp;
403 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
404 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
405 resp.max_ah = attr.max_ah;
406 resp.max_fmr = attr.max_fmr;
407 resp.max_map_per_fmr = attr.max_map_per_fmr;
408 resp.max_srq = attr.max_srq;
409 resp.max_srq_wr = attr.max_srq_wr;
410 resp.max_srq_sge = attr.max_srq_sge;
411 resp.max_pkeys = attr.max_pkeys;
412 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
413 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
415 if (copy_to_user((void __user *) (unsigned long) cmd.response,
422 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
423 const char __user *buf,
424 int in_len, int out_len)
426 struct ib_uverbs_query_port cmd;
427 struct ib_uverbs_query_port_resp resp;
428 struct ib_port_attr attr;
431 if (out_len < sizeof resp)
434 if (copy_from_user(&cmd, buf, sizeof cmd))
437 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
441 memset(&resp, 0, sizeof resp);
443 resp.state = attr.state;
444 resp.max_mtu = attr.max_mtu;
445 resp.active_mtu = attr.active_mtu;
446 resp.gid_tbl_len = attr.gid_tbl_len;
447 resp.port_cap_flags = attr.port_cap_flags;
448 resp.max_msg_sz = attr.max_msg_sz;
449 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
450 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
451 resp.pkey_tbl_len = attr.pkey_tbl_len;
453 resp.sm_lid = attr.sm_lid;
455 resp.max_vl_num = attr.max_vl_num;
456 resp.sm_sl = attr.sm_sl;
457 resp.subnet_timeout = attr.subnet_timeout;
458 resp.init_type_reply = attr.init_type_reply;
459 resp.active_width = attr.active_width;
460 resp.active_speed = attr.active_speed;
461 resp.phys_state = attr.phys_state;
463 if (copy_to_user((void __user *) (unsigned long) cmd.response,
470 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
471 const char __user *buf,
472 int in_len, int out_len)
474 struct ib_uverbs_alloc_pd cmd;
475 struct ib_uverbs_alloc_pd_resp resp;
476 struct ib_udata udata;
477 struct ib_uobject *uobj;
481 if (out_len < sizeof resp)
484 if (copy_from_user(&cmd, buf, sizeof cmd))
487 INIT_UDATA(&udata, buf + sizeof cmd,
488 (unsigned long) cmd.response + sizeof resp,
489 in_len - sizeof cmd, out_len - sizeof resp);
491 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
495 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
496 down_write(&uobj->mutex);
498 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
499 file->ucontext, &udata);
505 pd->device = file->device->ib_dev;
507 atomic_set(&pd->usecnt, 0);
510 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
514 memset(&resp, 0, sizeof resp);
515 resp.pd_handle = uobj->id;
517 if (copy_to_user((void __user *) (unsigned long) cmd.response,
518 &resp, sizeof resp)) {
523 mutex_lock(&file->mutex);
524 list_add_tail(&uobj->list, &file->ucontext->pd_list);
525 mutex_unlock(&file->mutex);
529 up_write(&uobj->mutex);
534 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
540 put_uobj_write(uobj);
544 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
545 const char __user *buf,
546 int in_len, int out_len)
548 struct ib_uverbs_dealloc_pd cmd;
549 struct ib_uobject *uobj;
552 if (copy_from_user(&cmd, buf, sizeof cmd))
555 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
559 ret = ib_dealloc_pd(uobj->object);
563 put_uobj_write(uobj);
568 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
570 mutex_lock(&file->mutex);
571 list_del(&uobj->list);
572 mutex_unlock(&file->mutex);
579 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
580 const char __user *buf, int in_len,
583 struct ib_uverbs_reg_mr cmd;
584 struct ib_uverbs_reg_mr_resp resp;
585 struct ib_udata udata;
586 struct ib_uobject *uobj;
591 if (out_len < sizeof resp)
594 if (copy_from_user(&cmd, buf, sizeof cmd))
597 INIT_UDATA(&udata, buf + sizeof cmd,
598 (unsigned long) cmd.response + sizeof resp,
599 in_len - sizeof cmd, out_len - sizeof resp);
601 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
605 * Local write permission is required if remote write or
606 * remote atomic permission is also requested.
608 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
609 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
612 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
616 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
617 down_write(&uobj->mutex);
619 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
625 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
626 cmd.access_flags, &udata);
632 mr->device = pd->device;
635 atomic_inc(&pd->usecnt);
636 atomic_set(&mr->usecnt, 0);
639 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
643 memset(&resp, 0, sizeof resp);
644 resp.lkey = mr->lkey;
645 resp.rkey = mr->rkey;
646 resp.mr_handle = uobj->id;
648 if (copy_to_user((void __user *) (unsigned long) cmd.response,
649 &resp, sizeof resp)) {
656 mutex_lock(&file->mutex);
657 list_add_tail(&uobj->list, &file->ucontext->mr_list);
658 mutex_unlock(&file->mutex);
662 up_write(&uobj->mutex);
667 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
676 put_uobj_write(uobj);
680 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
681 const char __user *buf, int in_len,
684 struct ib_uverbs_dereg_mr cmd;
686 struct ib_uobject *uobj;
689 if (copy_from_user(&cmd, buf, sizeof cmd))
692 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
698 ret = ib_dereg_mr(mr);
702 put_uobj_write(uobj);
707 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
709 mutex_lock(&file->mutex);
710 list_del(&uobj->list);
711 mutex_unlock(&file->mutex);
718 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
719 const char __user *buf, int in_len,
722 struct ib_uverbs_create_comp_channel cmd;
723 struct ib_uverbs_create_comp_channel_resp resp;
727 if (out_len < sizeof resp)
730 if (copy_from_user(&cmd, buf, sizeof cmd))
733 ret = get_unused_fd();
738 filp = ib_uverbs_alloc_event_file(file, 0);
740 put_unused_fd(resp.fd);
741 return PTR_ERR(filp);
744 if (copy_to_user((void __user *) (unsigned long) cmd.response,
745 &resp, sizeof resp)) {
746 put_unused_fd(resp.fd);
751 fd_install(resp.fd, filp);
755 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
756 const char __user *buf, int in_len,
759 struct ib_uverbs_create_cq cmd;
760 struct ib_uverbs_create_cq_resp resp;
761 struct ib_udata udata;
762 struct ib_ucq_object *obj;
763 struct ib_uverbs_event_file *ev_file = NULL;
767 if (out_len < sizeof resp)
770 if (copy_from_user(&cmd, buf, sizeof cmd))
773 INIT_UDATA(&udata, buf + sizeof cmd,
774 (unsigned long) cmd.response + sizeof resp,
775 in_len - sizeof cmd, out_len - sizeof resp);
777 if (cmd.comp_vector >= file->device->num_comp_vectors)
780 obj = kmalloc(sizeof *obj, GFP_KERNEL);
784 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
785 down_write(&obj->uobject.mutex);
787 if (cmd.comp_channel >= 0) {
788 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
795 obj->uverbs_file = file;
796 obj->comp_events_reported = 0;
797 obj->async_events_reported = 0;
798 INIT_LIST_HEAD(&obj->comp_list);
799 INIT_LIST_HEAD(&obj->async_list);
801 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
803 file->ucontext, &udata);
809 cq->device = file->device->ib_dev;
810 cq->uobject = &obj->uobject;
811 cq->comp_handler = ib_uverbs_comp_handler;
812 cq->event_handler = ib_uverbs_cq_event_handler;
813 cq->cq_context = ev_file;
814 atomic_set(&cq->usecnt, 0);
816 obj->uobject.object = cq;
817 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
821 memset(&resp, 0, sizeof resp);
822 resp.cq_handle = obj->uobject.id;
825 if (copy_to_user((void __user *) (unsigned long) cmd.response,
826 &resp, sizeof resp)) {
831 mutex_lock(&file->mutex);
832 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
833 mutex_unlock(&file->mutex);
835 obj->uobject.live = 1;
837 up_write(&obj->uobject.mutex);
842 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
849 ib_uverbs_release_ucq(file, ev_file, obj);
852 put_uobj_write(&obj->uobject);
856 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
857 const char __user *buf, int in_len,
860 struct ib_uverbs_resize_cq cmd;
861 struct ib_uverbs_resize_cq_resp resp;
862 struct ib_udata udata;
866 if (copy_from_user(&cmd, buf, sizeof cmd))
869 INIT_UDATA(&udata, buf + sizeof cmd,
870 (unsigned long) cmd.response + sizeof resp,
871 in_len - sizeof cmd, out_len - sizeof resp);
873 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
877 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
883 if (copy_to_user((void __user *) (unsigned long) cmd.response,
884 &resp, sizeof resp.cqe))
890 return ret ? ret : in_len;
893 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
894 const char __user *buf, int in_len,
897 struct ib_uverbs_poll_cq cmd;
898 struct ib_uverbs_poll_cq_resp *resp;
905 if (copy_from_user(&cmd, buf, sizeof cmd))
908 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
912 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
913 resp = kmalloc(rsize, GFP_KERNEL);
919 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
925 resp->count = ib_poll_cq(cq, cmd.ne, wc);
929 for (i = 0; i < resp->count; i++) {
930 resp->wc[i].wr_id = wc[i].wr_id;
931 resp->wc[i].status = wc[i].status;
932 resp->wc[i].opcode = wc[i].opcode;
933 resp->wc[i].vendor_err = wc[i].vendor_err;
934 resp->wc[i].byte_len = wc[i].byte_len;
935 resp->wc[i].ex.imm_data = (__u32 __force) wc[i].ex.imm_data;
936 resp->wc[i].qp_num = wc[i].qp->qp_num;
937 resp->wc[i].src_qp = wc[i].src_qp;
938 resp->wc[i].wc_flags = wc[i].wc_flags;
939 resp->wc[i].pkey_index = wc[i].pkey_index;
940 resp->wc[i].slid = wc[i].slid;
941 resp->wc[i].sl = wc[i].sl;
942 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
943 resp->wc[i].port_num = wc[i].port_num;
946 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
954 return ret ? ret : in_len;
957 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
958 const char __user *buf, int in_len,
961 struct ib_uverbs_req_notify_cq cmd;
964 if (copy_from_user(&cmd, buf, sizeof cmd))
967 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
971 ib_req_notify_cq(cq, cmd.solicited_only ?
972 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
979 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
980 const char __user *buf, int in_len,
983 struct ib_uverbs_destroy_cq cmd;
984 struct ib_uverbs_destroy_cq_resp resp;
985 struct ib_uobject *uobj;
987 struct ib_ucq_object *obj;
988 struct ib_uverbs_event_file *ev_file;
991 if (copy_from_user(&cmd, buf, sizeof cmd))
994 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
998 ev_file = cq->cq_context;
999 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1001 ret = ib_destroy_cq(cq);
1005 put_uobj_write(uobj);
1010 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1012 mutex_lock(&file->mutex);
1013 list_del(&uobj->list);
1014 mutex_unlock(&file->mutex);
1016 ib_uverbs_release_ucq(file, ev_file, obj);
1018 memset(&resp, 0, sizeof resp);
1019 resp.comp_events_reported = obj->comp_events_reported;
1020 resp.async_events_reported = obj->async_events_reported;
1024 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1025 &resp, sizeof resp))
1031 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1032 const char __user *buf, int in_len,
1035 struct ib_uverbs_create_qp cmd;
1036 struct ib_uverbs_create_qp_resp resp;
1037 struct ib_udata udata;
1038 struct ib_uqp_object *obj;
1040 struct ib_cq *scq, *rcq;
1043 struct ib_qp_init_attr attr;
1046 if (out_len < sizeof resp)
1049 if (copy_from_user(&cmd, buf, sizeof cmd))
1052 INIT_UDATA(&udata, buf + sizeof cmd,
1053 (unsigned long) cmd.response + sizeof resp,
1054 in_len - sizeof cmd, out_len - sizeof resp);
1056 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1060 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1061 down_write(&obj->uevent.uobject.mutex);
1063 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1064 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1065 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1066 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1067 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1069 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1074 attr.event_handler = ib_uverbs_qp_event_handler;
1075 attr.qp_context = file;
1079 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1080 attr.qp_type = cmd.qp_type;
1081 attr.create_flags = 0;
1083 attr.cap.max_send_wr = cmd.max_send_wr;
1084 attr.cap.max_recv_wr = cmd.max_recv_wr;
1085 attr.cap.max_send_sge = cmd.max_send_sge;
1086 attr.cap.max_recv_sge = cmd.max_recv_sge;
1087 attr.cap.max_inline_data = cmd.max_inline_data;
1089 obj->uevent.events_reported = 0;
1090 INIT_LIST_HEAD(&obj->uevent.event_list);
1091 INIT_LIST_HEAD(&obj->mcast_list);
1093 qp = pd->device->create_qp(pd, &attr, &udata);
1099 qp->device = pd->device;
1101 qp->send_cq = attr.send_cq;
1102 qp->recv_cq = attr.recv_cq;
1104 qp->uobject = &obj->uevent.uobject;
1105 qp->event_handler = attr.event_handler;
1106 qp->qp_context = attr.qp_context;
1107 qp->qp_type = attr.qp_type;
1108 atomic_inc(&pd->usecnt);
1109 atomic_inc(&attr.send_cq->usecnt);
1110 atomic_inc(&attr.recv_cq->usecnt);
1112 atomic_inc(&attr.srq->usecnt);
1114 obj->uevent.uobject.object = qp;
1115 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1119 memset(&resp, 0, sizeof resp);
1120 resp.qpn = qp->qp_num;
1121 resp.qp_handle = obj->uevent.uobject.id;
1122 resp.max_recv_sge = attr.cap.max_recv_sge;
1123 resp.max_send_sge = attr.cap.max_send_sge;
1124 resp.max_recv_wr = attr.cap.max_recv_wr;
1125 resp.max_send_wr = attr.cap.max_send_wr;
1126 resp.max_inline_data = attr.cap.max_inline_data;
1128 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1129 &resp, sizeof resp)) {
1141 mutex_lock(&file->mutex);
1142 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1143 mutex_unlock(&file->mutex);
1145 obj->uevent.uobject.live = 1;
1147 up_write(&obj->uevent.uobject.mutex);
1152 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1162 if (rcq && rcq != scq)
1167 put_uobj_write(&obj->uevent.uobject);
1171 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1172 const char __user *buf, int in_len,
1175 struct ib_uverbs_query_qp cmd;
1176 struct ib_uverbs_query_qp_resp resp;
1178 struct ib_qp_attr *attr;
1179 struct ib_qp_init_attr *init_attr;
1182 if (copy_from_user(&cmd, buf, sizeof cmd))
1185 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1186 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1187 if (!attr || !init_attr) {
1192 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1198 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1205 memset(&resp, 0, sizeof resp);
1207 resp.qp_state = attr->qp_state;
1208 resp.cur_qp_state = attr->cur_qp_state;
1209 resp.path_mtu = attr->path_mtu;
1210 resp.path_mig_state = attr->path_mig_state;
1211 resp.qkey = attr->qkey;
1212 resp.rq_psn = attr->rq_psn;
1213 resp.sq_psn = attr->sq_psn;
1214 resp.dest_qp_num = attr->dest_qp_num;
1215 resp.qp_access_flags = attr->qp_access_flags;
1216 resp.pkey_index = attr->pkey_index;
1217 resp.alt_pkey_index = attr->alt_pkey_index;
1218 resp.sq_draining = attr->sq_draining;
1219 resp.max_rd_atomic = attr->max_rd_atomic;
1220 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1221 resp.min_rnr_timer = attr->min_rnr_timer;
1222 resp.port_num = attr->port_num;
1223 resp.timeout = attr->timeout;
1224 resp.retry_cnt = attr->retry_cnt;
1225 resp.rnr_retry = attr->rnr_retry;
1226 resp.alt_port_num = attr->alt_port_num;
1227 resp.alt_timeout = attr->alt_timeout;
1229 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1230 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1231 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1232 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1233 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1234 resp.dest.dlid = attr->ah_attr.dlid;
1235 resp.dest.sl = attr->ah_attr.sl;
1236 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1237 resp.dest.static_rate = attr->ah_attr.static_rate;
1238 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1239 resp.dest.port_num = attr->ah_attr.port_num;
1241 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1242 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1243 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1244 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1245 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1246 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1247 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1248 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1249 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1250 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1251 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1253 resp.max_send_wr = init_attr->cap.max_send_wr;
1254 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1255 resp.max_send_sge = init_attr->cap.max_send_sge;
1256 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1257 resp.max_inline_data = init_attr->cap.max_inline_data;
1258 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1260 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1261 &resp, sizeof resp))
1268 return ret ? ret : in_len;
1271 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1272 const char __user *buf, int in_len,
1275 struct ib_uverbs_modify_qp cmd;
1276 struct ib_udata udata;
1278 struct ib_qp_attr *attr;
1281 if (copy_from_user(&cmd, buf, sizeof cmd))
1284 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1287 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1291 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1297 attr->qp_state = cmd.qp_state;
1298 attr->cur_qp_state = cmd.cur_qp_state;
1299 attr->path_mtu = cmd.path_mtu;
1300 attr->path_mig_state = cmd.path_mig_state;
1301 attr->qkey = cmd.qkey;
1302 attr->rq_psn = cmd.rq_psn;
1303 attr->sq_psn = cmd.sq_psn;
1304 attr->dest_qp_num = cmd.dest_qp_num;
1305 attr->qp_access_flags = cmd.qp_access_flags;
1306 attr->pkey_index = cmd.pkey_index;
1307 attr->alt_pkey_index = cmd.alt_pkey_index;
1308 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1309 attr->max_rd_atomic = cmd.max_rd_atomic;
1310 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1311 attr->min_rnr_timer = cmd.min_rnr_timer;
1312 attr->port_num = cmd.port_num;
1313 attr->timeout = cmd.timeout;
1314 attr->retry_cnt = cmd.retry_cnt;
1315 attr->rnr_retry = cmd.rnr_retry;
1316 attr->alt_port_num = cmd.alt_port_num;
1317 attr->alt_timeout = cmd.alt_timeout;
1319 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1320 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1321 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1322 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1323 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1324 attr->ah_attr.dlid = cmd.dest.dlid;
1325 attr->ah_attr.sl = cmd.dest.sl;
1326 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1327 attr->ah_attr.static_rate = cmd.dest.static_rate;
1328 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1329 attr->ah_attr.port_num = cmd.dest.port_num;
1331 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1332 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1333 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1334 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1335 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1336 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1337 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1338 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1339 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1340 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1341 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1343 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1358 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1359 const char __user *buf, int in_len,
1362 struct ib_uverbs_destroy_qp cmd;
1363 struct ib_uverbs_destroy_qp_resp resp;
1364 struct ib_uobject *uobj;
1366 struct ib_uqp_object *obj;
1369 if (copy_from_user(&cmd, buf, sizeof cmd))
1372 memset(&resp, 0, sizeof resp);
1374 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1378 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1380 if (!list_empty(&obj->mcast_list)) {
1381 put_uobj_write(uobj);
1385 ret = ib_destroy_qp(qp);
1389 put_uobj_write(uobj);
1394 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1396 mutex_lock(&file->mutex);
1397 list_del(&uobj->list);
1398 mutex_unlock(&file->mutex);
1400 ib_uverbs_release_uevent(file, &obj->uevent);
1402 resp.events_reported = obj->uevent.events_reported;
1406 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1407 &resp, sizeof resp))
1413 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1414 const char __user *buf, int in_len,
1417 struct ib_uverbs_post_send cmd;
1418 struct ib_uverbs_post_send_resp resp;
1419 struct ib_uverbs_send_wr *user_wr;
1420 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1424 ssize_t ret = -EINVAL;
1426 if (copy_from_user(&cmd, buf, sizeof cmd))
1429 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1430 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1433 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1436 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1440 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1444 is_ud = qp->qp_type == IB_QPT_UD;
1447 for (i = 0; i < cmd.wr_count; ++i) {
1448 if (copy_from_user(user_wr,
1449 buf + sizeof cmd + i * cmd.wqe_size,
1455 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1460 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1461 user_wr->num_sge * sizeof (struct ib_sge),
1475 next->wr_id = user_wr->wr_id;
1476 next->num_sge = user_wr->num_sge;
1477 next->opcode = user_wr->opcode;
1478 next->send_flags = user_wr->send_flags;
1481 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1483 if (!next->wr.ud.ah) {
1487 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1488 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1490 switch (next->opcode) {
1491 case IB_WR_RDMA_WRITE_WITH_IMM:
1493 (__be32 __force) user_wr->ex.imm_data;
1494 case IB_WR_RDMA_WRITE:
1495 case IB_WR_RDMA_READ:
1496 next->wr.rdma.remote_addr =
1497 user_wr->wr.rdma.remote_addr;
1498 next->wr.rdma.rkey =
1499 user_wr->wr.rdma.rkey;
1501 case IB_WR_SEND_WITH_IMM:
1503 (__be32 __force) user_wr->ex.imm_data;
1505 case IB_WR_SEND_WITH_INV:
1506 next->ex.invalidate_rkey =
1507 user_wr->ex.invalidate_rkey;
1509 case IB_WR_ATOMIC_CMP_AND_SWP:
1510 case IB_WR_ATOMIC_FETCH_AND_ADD:
1511 next->wr.atomic.remote_addr =
1512 user_wr->wr.atomic.remote_addr;
1513 next->wr.atomic.compare_add =
1514 user_wr->wr.atomic.compare_add;
1515 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1516 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1523 if (next->num_sge) {
1524 next->sg_list = (void *) next +
1525 ALIGN(sizeof *next, sizeof (struct ib_sge));
1526 if (copy_from_user(next->sg_list,
1528 cmd.wr_count * cmd.wqe_size +
1529 sg_ind * sizeof (struct ib_sge),
1530 next->num_sge * sizeof (struct ib_sge))) {
1534 sg_ind += next->num_sge;
1536 next->sg_list = NULL;
1540 ret = qp->device->post_send(qp, wr, &bad_wr);
1542 for (next = wr; next; next = next->next) {
1548 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1549 &resp, sizeof resp))
1556 if (is_ud && wr->wr.ud.ah)
1557 put_ah_read(wr->wr.ud.ah);
1566 return ret ? ret : in_len;
1569 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1575 struct ib_uverbs_recv_wr *user_wr;
1576 struct ib_recv_wr *wr = NULL, *last, *next;
1581 if (in_len < wqe_size * wr_count +
1582 sge_count * sizeof (struct ib_uverbs_sge))
1583 return ERR_PTR(-EINVAL);
1585 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1586 return ERR_PTR(-EINVAL);
1588 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1590 return ERR_PTR(-ENOMEM);
1594 for (i = 0; i < wr_count; ++i) {
1595 if (copy_from_user(user_wr, buf + i * wqe_size,
1601 if (user_wr->num_sge + sg_ind > sge_count) {
1606 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1607 user_wr->num_sge * sizeof (struct ib_sge),
1621 next->wr_id = user_wr->wr_id;
1622 next->num_sge = user_wr->num_sge;
1624 if (next->num_sge) {
1625 next->sg_list = (void *) next +
1626 ALIGN(sizeof *next, sizeof (struct ib_sge));
1627 if (copy_from_user(next->sg_list,
1628 buf + wr_count * wqe_size +
1629 sg_ind * sizeof (struct ib_sge),
1630 next->num_sge * sizeof (struct ib_sge))) {
1634 sg_ind += next->num_sge;
1636 next->sg_list = NULL;
1651 return ERR_PTR(ret);
1654 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1655 const char __user *buf, int in_len,
1658 struct ib_uverbs_post_recv cmd;
1659 struct ib_uverbs_post_recv_resp resp;
1660 struct ib_recv_wr *wr, *next, *bad_wr;
1662 ssize_t ret = -EINVAL;
1664 if (copy_from_user(&cmd, buf, sizeof cmd))
1667 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1668 in_len - sizeof cmd, cmd.wr_count,
1669 cmd.sge_count, cmd.wqe_size);
1673 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1678 ret = qp->device->post_recv(qp, wr, &bad_wr);
1683 for (next = wr; next; next = next->next) {
1689 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1690 &resp, sizeof resp))
1700 return ret ? ret : in_len;
1703 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1704 const char __user *buf, int in_len,
1707 struct ib_uverbs_post_srq_recv cmd;
1708 struct ib_uverbs_post_srq_recv_resp resp;
1709 struct ib_recv_wr *wr, *next, *bad_wr;
1711 ssize_t ret = -EINVAL;
1713 if (copy_from_user(&cmd, buf, sizeof cmd))
1716 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1717 in_len - sizeof cmd, cmd.wr_count,
1718 cmd.sge_count, cmd.wqe_size);
1722 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1727 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1732 for (next = wr; next; next = next->next) {
1738 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1739 &resp, sizeof resp))
1749 return ret ? ret : in_len;
1752 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1753 const char __user *buf, int in_len,
1756 struct ib_uverbs_create_ah cmd;
1757 struct ib_uverbs_create_ah_resp resp;
1758 struct ib_uobject *uobj;
1761 struct ib_ah_attr attr;
1764 if (out_len < sizeof resp)
1767 if (copy_from_user(&cmd, buf, sizeof cmd))
1770 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1774 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1775 down_write(&uobj->mutex);
1777 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1783 attr.dlid = cmd.attr.dlid;
1784 attr.sl = cmd.attr.sl;
1785 attr.src_path_bits = cmd.attr.src_path_bits;
1786 attr.static_rate = cmd.attr.static_rate;
1787 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1788 attr.port_num = cmd.attr.port_num;
1789 attr.grh.flow_label = cmd.attr.grh.flow_label;
1790 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1791 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1792 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1793 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1795 ah = ib_create_ah(pd, &attr);
1804 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1808 resp.ah_handle = uobj->id;
1810 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1811 &resp, sizeof resp)) {
1818 mutex_lock(&file->mutex);
1819 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1820 mutex_unlock(&file->mutex);
1824 up_write(&uobj->mutex);
1829 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1838 put_uobj_write(uobj);
1842 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1843 const char __user *buf, int in_len, int out_len)
1845 struct ib_uverbs_destroy_ah cmd;
1847 struct ib_uobject *uobj;
1850 if (copy_from_user(&cmd, buf, sizeof cmd))
1853 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1858 ret = ib_destroy_ah(ah);
1862 put_uobj_write(uobj);
1867 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1869 mutex_lock(&file->mutex);
1870 list_del(&uobj->list);
1871 mutex_unlock(&file->mutex);
1878 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1879 const char __user *buf, int in_len,
1882 struct ib_uverbs_attach_mcast cmd;
1884 struct ib_uqp_object *obj;
1885 struct ib_uverbs_mcast_entry *mcast;
1888 if (copy_from_user(&cmd, buf, sizeof cmd))
1891 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1895 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1897 list_for_each_entry(mcast, &obj->mcast_list, list)
1898 if (cmd.mlid == mcast->lid &&
1899 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1904 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1910 mcast->lid = cmd.mlid;
1911 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1913 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1915 list_add_tail(&mcast->list, &obj->mcast_list);
1922 return ret ? ret : in_len;
1925 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1926 const char __user *buf, int in_len,
1929 struct ib_uverbs_detach_mcast cmd;
1930 struct ib_uqp_object *obj;
1932 struct ib_uverbs_mcast_entry *mcast;
1935 if (copy_from_user(&cmd, buf, sizeof cmd))
1938 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1942 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1946 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1948 list_for_each_entry(mcast, &obj->mcast_list, list)
1949 if (cmd.mlid == mcast->lid &&
1950 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1951 list_del(&mcast->list);
1959 return ret ? ret : in_len;
1962 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1963 const char __user *buf, int in_len,
1966 struct ib_uverbs_create_srq cmd;
1967 struct ib_uverbs_create_srq_resp resp;
1968 struct ib_udata udata;
1969 struct ib_uevent_object *obj;
1972 struct ib_srq_init_attr attr;
1975 if (out_len < sizeof resp)
1978 if (copy_from_user(&cmd, buf, sizeof cmd))
1981 INIT_UDATA(&udata, buf + sizeof cmd,
1982 (unsigned long) cmd.response + sizeof resp,
1983 in_len - sizeof cmd, out_len - sizeof resp);
1985 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1989 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1990 down_write(&obj->uobject.mutex);
1992 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1998 attr.event_handler = ib_uverbs_srq_event_handler;
1999 attr.srq_context = file;
2000 attr.attr.max_wr = cmd.max_wr;
2001 attr.attr.max_sge = cmd.max_sge;
2002 attr.attr.srq_limit = cmd.srq_limit;
2004 obj->events_reported = 0;
2005 INIT_LIST_HEAD(&obj->event_list);
2007 srq = pd->device->create_srq(pd, &attr, &udata);
2013 srq->device = pd->device;
2015 srq->uobject = &obj->uobject;
2016 srq->event_handler = attr.event_handler;
2017 srq->srq_context = attr.srq_context;
2018 atomic_inc(&pd->usecnt);
2019 atomic_set(&srq->usecnt, 0);
2021 obj->uobject.object = srq;
2022 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2026 memset(&resp, 0, sizeof resp);
2027 resp.srq_handle = obj->uobject.id;
2028 resp.max_wr = attr.attr.max_wr;
2029 resp.max_sge = attr.attr.max_sge;
2031 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2032 &resp, sizeof resp)) {
2039 mutex_lock(&file->mutex);
2040 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2041 mutex_unlock(&file->mutex);
2043 obj->uobject.live = 1;
2045 up_write(&obj->uobject.mutex);
2050 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2053 ib_destroy_srq(srq);
2059 put_uobj_write(&obj->uobject);
2063 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2064 const char __user *buf, int in_len,
2067 struct ib_uverbs_modify_srq cmd;
2068 struct ib_udata udata;
2070 struct ib_srq_attr attr;
2073 if (copy_from_user(&cmd, buf, sizeof cmd))
2076 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2079 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2083 attr.max_wr = cmd.max_wr;
2084 attr.srq_limit = cmd.srq_limit;
2086 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2090 return ret ? ret : in_len;
2093 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2094 const char __user *buf,
2095 int in_len, int out_len)
2097 struct ib_uverbs_query_srq cmd;
2098 struct ib_uverbs_query_srq_resp resp;
2099 struct ib_srq_attr attr;
2103 if (out_len < sizeof resp)
2106 if (copy_from_user(&cmd, buf, sizeof cmd))
2109 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2113 ret = ib_query_srq(srq, &attr);
2120 memset(&resp, 0, sizeof resp);
2122 resp.max_wr = attr.max_wr;
2123 resp.max_sge = attr.max_sge;
2124 resp.srq_limit = attr.srq_limit;
2126 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2127 &resp, sizeof resp))
2133 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2134 const char __user *buf, int in_len,
2137 struct ib_uverbs_destroy_srq cmd;
2138 struct ib_uverbs_destroy_srq_resp resp;
2139 struct ib_uobject *uobj;
2141 struct ib_uevent_object *obj;
2144 if (copy_from_user(&cmd, buf, sizeof cmd))
2147 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2151 obj = container_of(uobj, struct ib_uevent_object, uobject);
2153 ret = ib_destroy_srq(srq);
2157 put_uobj_write(uobj);
2162 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2164 mutex_lock(&file->mutex);
2165 list_del(&uobj->list);
2166 mutex_unlock(&file->mutex);
2168 ib_uverbs_release_uevent(file, obj);
2170 memset(&resp, 0, sizeof resp);
2171 resp.events_reported = obj->events_reported;
2175 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2176 &resp, sizeof resp))
2179 return ret ? ret : in_len;