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>
38 #include <linux/slab.h>
40 #include <asm/uaccess.h>
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
53 (udata)->inbuf = (void __user *) (ibuf); \
54 (udata)->outbuf = (void __user *) (obuf); \
55 (udata)->inlen = (ilen); \
56 (udata)->outlen = (olen); \
60 * The ib_uobject locking scheme is as follows:
62 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
63 * needs to be held during all idr operations. When an object is
64 * looked up, a reference must be taken on the object's kref before
67 * - Each object also has an rwsem. This rwsem must be held for
68 * reading while an operation that uses the object is performed.
69 * For example, while registering an MR, the associated PD's
70 * uobject.mutex must be held for reading. The rwsem must be held
71 * for writing while initializing or destroying an object.
73 * - In addition, each object has a "live" flag. If this flag is not
74 * set, then lookups of the object will fail even if it is found in
75 * the idr. This handles a reader that blocks and does not acquire
76 * the rwsem until after the object is destroyed. The destroy
77 * operation will set the live flag to 0 and then drop the rwsem;
78 * this will allow the reader to acquire the rwsem, see that the
79 * live flag is 0, and then drop the rwsem and its reference to
80 * object. The underlying storage will not be freed until the last
81 * reference to the object is dropped.
84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
85 struct ib_ucontext *context, struct lock_class_key *key)
87 uobj->user_handle = user_handle;
88 uobj->context = context;
89 kref_init(&uobj->ref);
90 init_rwsem(&uobj->mutex);
91 lockdep_set_class(&uobj->mutex, key);
95 static void release_uobj(struct kref *kref)
97 kfree(container_of(kref, struct ib_uobject, ref));
100 static void put_uobj(struct ib_uobject *uobj)
102 kref_put(&uobj->ref, release_uobj);
105 static void put_uobj_read(struct ib_uobject *uobj)
107 up_read(&uobj->mutex);
111 static void put_uobj_write(struct ib_uobject *uobj)
113 up_write(&uobj->mutex);
117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
122 if (!idr_pre_get(idr, GFP_KERNEL))
125 spin_lock(&ib_uverbs_idr_lock);
126 ret = idr_get_new(idr, uobj, &uobj->id);
127 spin_unlock(&ib_uverbs_idr_lock);
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
137 spin_lock(&ib_uverbs_idr_lock);
138 idr_remove(idr, uobj->id);
139 spin_unlock(&ib_uverbs_idr_lock);
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143 struct ib_ucontext *context)
145 struct ib_uobject *uobj;
147 spin_lock(&ib_uverbs_idr_lock);
148 uobj = idr_find(idr, id);
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
155 spin_unlock(&ib_uverbs_idr_lock);
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161 struct ib_ucontext *context, int nested)
163 struct ib_uobject *uobj;
165 uobj = __idr_get_uobj(idr, id, context);
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
172 down_read(&uobj->mutex);
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182 struct ib_ucontext *context)
184 struct ib_uobject *uobj;
186 uobj = __idr_get_uobj(idr, id, context);
190 down_write(&uobj->mutex);
192 put_uobj_write(uobj);
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
202 struct ib_uobject *uobj;
204 uobj = idr_read_uobj(idr, id, context, nested);
205 return uobj ? uobj->object : NULL;
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
213 static void put_pd_read(struct ib_pd *pd)
215 put_uobj_read(pd->uobject);
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
223 static void put_cq_read(struct ib_cq *cq)
225 put_uobj_read(cq->uobject);
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
233 static void put_ah_read(struct ib_ah *ah)
235 put_uobj_read(ah->uobject);
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
243 static void put_qp_read(struct ib_qp *qp)
245 put_uobj_read(qp->uobject);
248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
250 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
253 static void put_srq_read(struct ib_srq *srq)
255 put_uobj_read(srq->uobject);
258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
259 const char __user *buf,
260 int in_len, int out_len)
262 struct ib_uverbs_get_context cmd;
263 struct ib_uverbs_get_context_resp resp;
264 struct ib_udata udata;
265 struct ib_device *ibdev = file->device->ib_dev;
266 struct ib_ucontext *ucontext;
270 if (out_len < sizeof resp)
273 if (copy_from_user(&cmd, buf, sizeof cmd))
276 mutex_lock(&file->mutex);
278 if (file->ucontext) {
283 INIT_UDATA(&udata, buf + sizeof cmd,
284 (unsigned long) cmd.response + sizeof resp,
285 in_len - sizeof cmd, out_len - sizeof resp);
287 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
288 if (IS_ERR(ucontext)) {
289 ret = PTR_ERR(ucontext);
293 ucontext->device = ibdev;
294 INIT_LIST_HEAD(&ucontext->pd_list);
295 INIT_LIST_HEAD(&ucontext->mr_list);
296 INIT_LIST_HEAD(&ucontext->mw_list);
297 INIT_LIST_HEAD(&ucontext->cq_list);
298 INIT_LIST_HEAD(&ucontext->qp_list);
299 INIT_LIST_HEAD(&ucontext->srq_list);
300 INIT_LIST_HEAD(&ucontext->ah_list);
301 ucontext->closing = 0;
303 resp.num_comp_vectors = file->device->num_comp_vectors;
305 ret = get_unused_fd();
310 filp = ib_uverbs_alloc_event_file(file, 1);
316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
317 &resp, sizeof resp)) {
322 file->async_file = filp->private_data;
324 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
325 ib_uverbs_event_handler);
326 ret = ib_register_event_handler(&file->event_handler);
330 kref_get(&file->async_file->ref);
331 kref_get(&file->ref);
332 file->ucontext = ucontext;
334 fd_install(resp.async_fd, filp);
336 mutex_unlock(&file->mutex);
344 put_unused_fd(resp.async_fd);
347 ibdev->dealloc_ucontext(ucontext);
350 mutex_unlock(&file->mutex);
354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
355 const char __user *buf,
356 int in_len, int out_len)
358 struct ib_uverbs_query_device cmd;
359 struct ib_uverbs_query_device_resp resp;
360 struct ib_device_attr attr;
363 if (out_len < sizeof resp)
366 if (copy_from_user(&cmd, buf, sizeof cmd))
369 ret = ib_query_device(file->device->ib_dev, &attr);
373 memset(&resp, 0, sizeof resp);
375 resp.fw_ver = attr.fw_ver;
376 resp.node_guid = file->device->ib_dev->node_guid;
377 resp.sys_image_guid = attr.sys_image_guid;
378 resp.max_mr_size = attr.max_mr_size;
379 resp.page_size_cap = attr.page_size_cap;
380 resp.vendor_id = attr.vendor_id;
381 resp.vendor_part_id = attr.vendor_part_id;
382 resp.hw_ver = attr.hw_ver;
383 resp.max_qp = attr.max_qp;
384 resp.max_qp_wr = attr.max_qp_wr;
385 resp.device_cap_flags = attr.device_cap_flags;
386 resp.max_sge = attr.max_sge;
387 resp.max_sge_rd = attr.max_sge_rd;
388 resp.max_cq = attr.max_cq;
389 resp.max_cqe = attr.max_cqe;
390 resp.max_mr = attr.max_mr;
391 resp.max_pd = attr.max_pd;
392 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
393 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
394 resp.max_res_rd_atom = attr.max_res_rd_atom;
395 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
396 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
397 resp.atomic_cap = attr.atomic_cap;
398 resp.max_ee = attr.max_ee;
399 resp.max_rdd = attr.max_rdd;
400 resp.max_mw = attr.max_mw;
401 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
402 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
403 resp.max_mcast_grp = attr.max_mcast_grp;
404 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
405 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
406 resp.max_ah = attr.max_ah;
407 resp.max_fmr = attr.max_fmr;
408 resp.max_map_per_fmr = attr.max_map_per_fmr;
409 resp.max_srq = attr.max_srq;
410 resp.max_srq_wr = attr.max_srq_wr;
411 resp.max_srq_sge = attr.max_srq_sge;
412 resp.max_pkeys = attr.max_pkeys;
413 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
414 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
416 if (copy_to_user((void __user *) (unsigned long) cmd.response,
423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
424 const char __user *buf,
425 int in_len, int out_len)
427 struct ib_uverbs_query_port cmd;
428 struct ib_uverbs_query_port_resp resp;
429 struct ib_port_attr attr;
432 if (out_len < sizeof resp)
435 if (copy_from_user(&cmd, buf, sizeof cmd))
438 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
442 memset(&resp, 0, sizeof resp);
444 resp.state = attr.state;
445 resp.max_mtu = attr.max_mtu;
446 resp.active_mtu = attr.active_mtu;
447 resp.gid_tbl_len = attr.gid_tbl_len;
448 resp.port_cap_flags = attr.port_cap_flags;
449 resp.max_msg_sz = attr.max_msg_sz;
450 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
451 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
452 resp.pkey_tbl_len = attr.pkey_tbl_len;
454 resp.sm_lid = attr.sm_lid;
456 resp.max_vl_num = attr.max_vl_num;
457 resp.sm_sl = attr.sm_sl;
458 resp.subnet_timeout = attr.subnet_timeout;
459 resp.init_type_reply = attr.init_type_reply;
460 resp.active_width = attr.active_width;
461 resp.active_speed = attr.active_speed;
462 resp.phys_state = attr.phys_state;
463 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
466 if (copy_to_user((void __user *) (unsigned long) cmd.response,
473 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
474 const char __user *buf,
475 int in_len, int out_len)
477 struct ib_uverbs_alloc_pd cmd;
478 struct ib_uverbs_alloc_pd_resp resp;
479 struct ib_udata udata;
480 struct ib_uobject *uobj;
484 if (out_len < sizeof resp)
487 if (copy_from_user(&cmd, buf, sizeof cmd))
490 INIT_UDATA(&udata, buf + sizeof cmd,
491 (unsigned long) cmd.response + sizeof resp,
492 in_len - sizeof cmd, out_len - sizeof resp);
494 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
498 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
499 down_write(&uobj->mutex);
501 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
502 file->ucontext, &udata);
508 pd->device = file->device->ib_dev;
510 atomic_set(&pd->usecnt, 0);
513 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
517 memset(&resp, 0, sizeof resp);
518 resp.pd_handle = uobj->id;
520 if (copy_to_user((void __user *) (unsigned long) cmd.response,
521 &resp, sizeof resp)) {
526 mutex_lock(&file->mutex);
527 list_add_tail(&uobj->list, &file->ucontext->pd_list);
528 mutex_unlock(&file->mutex);
532 up_write(&uobj->mutex);
537 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
543 put_uobj_write(uobj);
547 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
548 const char __user *buf,
549 int in_len, int out_len)
551 struct ib_uverbs_dealloc_pd cmd;
552 struct ib_uobject *uobj;
555 if (copy_from_user(&cmd, buf, sizeof cmd))
558 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
562 ret = ib_dealloc_pd(uobj->object);
566 put_uobj_write(uobj);
571 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
573 mutex_lock(&file->mutex);
574 list_del(&uobj->list);
575 mutex_unlock(&file->mutex);
582 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
583 const char __user *buf, int in_len,
586 struct ib_uverbs_reg_mr cmd;
587 struct ib_uverbs_reg_mr_resp resp;
588 struct ib_udata udata;
589 struct ib_uobject *uobj;
594 if (out_len < sizeof resp)
597 if (copy_from_user(&cmd, buf, sizeof cmd))
600 INIT_UDATA(&udata, buf + sizeof cmd,
601 (unsigned long) cmd.response + sizeof resp,
602 in_len - sizeof cmd, out_len - sizeof resp);
604 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
608 * Local write permission is required if remote write or
609 * remote atomic permission is also requested.
611 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
612 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
615 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
619 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
620 down_write(&uobj->mutex);
622 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
628 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
629 cmd.access_flags, &udata);
635 mr->device = pd->device;
638 atomic_inc(&pd->usecnt);
639 atomic_set(&mr->usecnt, 0);
642 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
646 memset(&resp, 0, sizeof resp);
647 resp.lkey = mr->lkey;
648 resp.rkey = mr->rkey;
649 resp.mr_handle = uobj->id;
651 if (copy_to_user((void __user *) (unsigned long) cmd.response,
652 &resp, sizeof resp)) {
659 mutex_lock(&file->mutex);
660 list_add_tail(&uobj->list, &file->ucontext->mr_list);
661 mutex_unlock(&file->mutex);
665 up_write(&uobj->mutex);
670 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
679 put_uobj_write(uobj);
683 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
684 const char __user *buf, int in_len,
687 struct ib_uverbs_dereg_mr cmd;
689 struct ib_uobject *uobj;
692 if (copy_from_user(&cmd, buf, sizeof cmd))
695 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
701 ret = ib_dereg_mr(mr);
705 put_uobj_write(uobj);
710 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
712 mutex_lock(&file->mutex);
713 list_del(&uobj->list);
714 mutex_unlock(&file->mutex);
721 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
722 const char __user *buf, int in_len,
725 struct ib_uverbs_create_comp_channel cmd;
726 struct ib_uverbs_create_comp_channel_resp resp;
730 if (out_len < sizeof resp)
733 if (copy_from_user(&cmd, buf, sizeof cmd))
736 ret = get_unused_fd();
741 filp = ib_uverbs_alloc_event_file(file, 0);
743 put_unused_fd(resp.fd);
744 return PTR_ERR(filp);
747 if (copy_to_user((void __user *) (unsigned long) cmd.response,
748 &resp, sizeof resp)) {
749 put_unused_fd(resp.fd);
754 fd_install(resp.fd, filp);
758 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
759 const char __user *buf, int in_len,
762 struct ib_uverbs_create_cq cmd;
763 struct ib_uverbs_create_cq_resp resp;
764 struct ib_udata udata;
765 struct ib_ucq_object *obj;
766 struct ib_uverbs_event_file *ev_file = NULL;
770 if (out_len < sizeof resp)
773 if (copy_from_user(&cmd, buf, sizeof cmd))
776 INIT_UDATA(&udata, buf + sizeof cmd,
777 (unsigned long) cmd.response + sizeof resp,
778 in_len - sizeof cmd, out_len - sizeof resp);
780 if (cmd.comp_vector >= file->device->num_comp_vectors)
783 obj = kmalloc(sizeof *obj, GFP_KERNEL);
787 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
788 down_write(&obj->uobject.mutex);
790 if (cmd.comp_channel >= 0) {
791 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
798 obj->uverbs_file = file;
799 obj->comp_events_reported = 0;
800 obj->async_events_reported = 0;
801 INIT_LIST_HEAD(&obj->comp_list);
802 INIT_LIST_HEAD(&obj->async_list);
804 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
806 file->ucontext, &udata);
812 cq->device = file->device->ib_dev;
813 cq->uobject = &obj->uobject;
814 cq->comp_handler = ib_uverbs_comp_handler;
815 cq->event_handler = ib_uverbs_cq_event_handler;
816 cq->cq_context = ev_file;
817 atomic_set(&cq->usecnt, 0);
819 obj->uobject.object = cq;
820 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
824 memset(&resp, 0, sizeof resp);
825 resp.cq_handle = obj->uobject.id;
828 if (copy_to_user((void __user *) (unsigned long) cmd.response,
829 &resp, sizeof resp)) {
834 mutex_lock(&file->mutex);
835 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
836 mutex_unlock(&file->mutex);
838 obj->uobject.live = 1;
840 up_write(&obj->uobject.mutex);
845 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
852 ib_uverbs_release_ucq(file, ev_file, obj);
855 put_uobj_write(&obj->uobject);
859 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
860 const char __user *buf, int in_len,
863 struct ib_uverbs_resize_cq cmd;
864 struct ib_uverbs_resize_cq_resp resp;
865 struct ib_udata udata;
869 if (copy_from_user(&cmd, buf, sizeof cmd))
872 INIT_UDATA(&udata, buf + sizeof cmd,
873 (unsigned long) cmd.response + sizeof resp,
874 in_len - sizeof cmd, out_len - sizeof resp);
876 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
880 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
886 if (copy_to_user((void __user *) (unsigned long) cmd.response,
887 &resp, sizeof resp.cqe))
893 return ret ? ret : in_len;
896 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
898 struct ib_uverbs_wc tmp;
900 tmp.wr_id = wc->wr_id;
901 tmp.status = wc->status;
902 tmp.opcode = wc->opcode;
903 tmp.vendor_err = wc->vendor_err;
904 tmp.byte_len = wc->byte_len;
905 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
906 tmp.qp_num = wc->qp->qp_num;
907 tmp.src_qp = wc->src_qp;
908 tmp.wc_flags = wc->wc_flags;
909 tmp.pkey_index = wc->pkey_index;
912 tmp.dlid_path_bits = wc->dlid_path_bits;
913 tmp.port_num = wc->port_num;
916 if (copy_to_user(dest, &tmp, sizeof tmp))
922 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
923 const char __user *buf, int in_len,
926 struct ib_uverbs_poll_cq cmd;
927 struct ib_uverbs_poll_cq_resp resp;
928 u8 __user *header_ptr;
934 if (copy_from_user(&cmd, buf, sizeof cmd))
937 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
941 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
942 header_ptr = (void __user *)(unsigned long) cmd.response;
943 data_ptr = header_ptr + sizeof resp;
945 memset(&resp, 0, sizeof resp);
946 while (resp.count < cmd.ne) {
947 ret = ib_poll_cq(cq, 1, &wc);
953 ret = copy_wc_to_user(data_ptr, &wc);
957 data_ptr += sizeof(struct ib_uverbs_wc);
961 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
973 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
974 const char __user *buf, int in_len,
977 struct ib_uverbs_req_notify_cq cmd;
980 if (copy_from_user(&cmd, buf, sizeof cmd))
983 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
987 ib_req_notify_cq(cq, cmd.solicited_only ?
988 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
995 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
996 const char __user *buf, int in_len,
999 struct ib_uverbs_destroy_cq cmd;
1000 struct ib_uverbs_destroy_cq_resp resp;
1001 struct ib_uobject *uobj;
1003 struct ib_ucq_object *obj;
1004 struct ib_uverbs_event_file *ev_file;
1007 if (copy_from_user(&cmd, buf, sizeof cmd))
1010 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1014 ev_file = cq->cq_context;
1015 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1017 ret = ib_destroy_cq(cq);
1021 put_uobj_write(uobj);
1026 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1028 mutex_lock(&file->mutex);
1029 list_del(&uobj->list);
1030 mutex_unlock(&file->mutex);
1032 ib_uverbs_release_ucq(file, ev_file, obj);
1034 memset(&resp, 0, sizeof resp);
1035 resp.comp_events_reported = obj->comp_events_reported;
1036 resp.async_events_reported = obj->async_events_reported;
1040 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1041 &resp, sizeof resp))
1047 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1048 const char __user *buf, int in_len,
1051 struct ib_uverbs_create_qp cmd;
1052 struct ib_uverbs_create_qp_resp resp;
1053 struct ib_udata udata;
1054 struct ib_uqp_object *obj;
1056 struct ib_cq *scq, *rcq;
1059 struct ib_qp_init_attr attr;
1062 if (out_len < sizeof resp)
1065 if (copy_from_user(&cmd, buf, sizeof cmd))
1068 INIT_UDATA(&udata, buf + sizeof cmd,
1069 (unsigned long) cmd.response + sizeof resp,
1070 in_len - sizeof cmd, out_len - sizeof resp);
1072 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1076 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1077 down_write(&obj->uevent.uobject.mutex);
1079 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1080 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1081 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1082 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1083 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1085 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1090 attr.event_handler = ib_uverbs_qp_event_handler;
1091 attr.qp_context = file;
1095 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1096 attr.qp_type = cmd.qp_type;
1097 attr.create_flags = 0;
1099 attr.cap.max_send_wr = cmd.max_send_wr;
1100 attr.cap.max_recv_wr = cmd.max_recv_wr;
1101 attr.cap.max_send_sge = cmd.max_send_sge;
1102 attr.cap.max_recv_sge = cmd.max_recv_sge;
1103 attr.cap.max_inline_data = cmd.max_inline_data;
1105 obj->uevent.events_reported = 0;
1106 INIT_LIST_HEAD(&obj->uevent.event_list);
1107 INIT_LIST_HEAD(&obj->mcast_list);
1109 qp = pd->device->create_qp(pd, &attr, &udata);
1115 qp->device = pd->device;
1117 qp->send_cq = attr.send_cq;
1118 qp->recv_cq = attr.recv_cq;
1120 qp->uobject = &obj->uevent.uobject;
1121 qp->event_handler = attr.event_handler;
1122 qp->qp_context = attr.qp_context;
1123 qp->qp_type = attr.qp_type;
1124 atomic_inc(&pd->usecnt);
1125 atomic_inc(&attr.send_cq->usecnt);
1126 atomic_inc(&attr.recv_cq->usecnt);
1128 atomic_inc(&attr.srq->usecnt);
1130 obj->uevent.uobject.object = qp;
1131 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1135 memset(&resp, 0, sizeof resp);
1136 resp.qpn = qp->qp_num;
1137 resp.qp_handle = obj->uevent.uobject.id;
1138 resp.max_recv_sge = attr.cap.max_recv_sge;
1139 resp.max_send_sge = attr.cap.max_send_sge;
1140 resp.max_recv_wr = attr.cap.max_recv_wr;
1141 resp.max_send_wr = attr.cap.max_send_wr;
1142 resp.max_inline_data = attr.cap.max_inline_data;
1144 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1145 &resp, sizeof resp)) {
1157 mutex_lock(&file->mutex);
1158 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1159 mutex_unlock(&file->mutex);
1161 obj->uevent.uobject.live = 1;
1163 up_write(&obj->uevent.uobject.mutex);
1168 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1178 if (rcq && rcq != scq)
1183 put_uobj_write(&obj->uevent.uobject);
1187 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1188 const char __user *buf, int in_len,
1191 struct ib_uverbs_query_qp cmd;
1192 struct ib_uverbs_query_qp_resp resp;
1194 struct ib_qp_attr *attr;
1195 struct ib_qp_init_attr *init_attr;
1198 if (copy_from_user(&cmd, buf, sizeof cmd))
1201 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1202 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1203 if (!attr || !init_attr) {
1208 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1214 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1221 memset(&resp, 0, sizeof resp);
1223 resp.qp_state = attr->qp_state;
1224 resp.cur_qp_state = attr->cur_qp_state;
1225 resp.path_mtu = attr->path_mtu;
1226 resp.path_mig_state = attr->path_mig_state;
1227 resp.qkey = attr->qkey;
1228 resp.rq_psn = attr->rq_psn;
1229 resp.sq_psn = attr->sq_psn;
1230 resp.dest_qp_num = attr->dest_qp_num;
1231 resp.qp_access_flags = attr->qp_access_flags;
1232 resp.pkey_index = attr->pkey_index;
1233 resp.alt_pkey_index = attr->alt_pkey_index;
1234 resp.sq_draining = attr->sq_draining;
1235 resp.max_rd_atomic = attr->max_rd_atomic;
1236 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1237 resp.min_rnr_timer = attr->min_rnr_timer;
1238 resp.port_num = attr->port_num;
1239 resp.timeout = attr->timeout;
1240 resp.retry_cnt = attr->retry_cnt;
1241 resp.rnr_retry = attr->rnr_retry;
1242 resp.alt_port_num = attr->alt_port_num;
1243 resp.alt_timeout = attr->alt_timeout;
1245 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1246 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1247 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1248 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1249 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1250 resp.dest.dlid = attr->ah_attr.dlid;
1251 resp.dest.sl = attr->ah_attr.sl;
1252 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1253 resp.dest.static_rate = attr->ah_attr.static_rate;
1254 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1255 resp.dest.port_num = attr->ah_attr.port_num;
1257 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1258 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1259 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1260 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1261 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1262 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1263 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1264 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1265 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1266 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1267 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1269 resp.max_send_wr = init_attr->cap.max_send_wr;
1270 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1271 resp.max_send_sge = init_attr->cap.max_send_sge;
1272 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1273 resp.max_inline_data = init_attr->cap.max_inline_data;
1274 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1276 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1277 &resp, sizeof resp))
1284 return ret ? ret : in_len;
1287 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1288 const char __user *buf, int in_len,
1291 struct ib_uverbs_modify_qp cmd;
1292 struct ib_udata udata;
1294 struct ib_qp_attr *attr;
1297 if (copy_from_user(&cmd, buf, sizeof cmd))
1300 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1303 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1307 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1313 attr->qp_state = cmd.qp_state;
1314 attr->cur_qp_state = cmd.cur_qp_state;
1315 attr->path_mtu = cmd.path_mtu;
1316 attr->path_mig_state = cmd.path_mig_state;
1317 attr->qkey = cmd.qkey;
1318 attr->rq_psn = cmd.rq_psn;
1319 attr->sq_psn = cmd.sq_psn;
1320 attr->dest_qp_num = cmd.dest_qp_num;
1321 attr->qp_access_flags = cmd.qp_access_flags;
1322 attr->pkey_index = cmd.pkey_index;
1323 attr->alt_pkey_index = cmd.alt_pkey_index;
1324 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1325 attr->max_rd_atomic = cmd.max_rd_atomic;
1326 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1327 attr->min_rnr_timer = cmd.min_rnr_timer;
1328 attr->port_num = cmd.port_num;
1329 attr->timeout = cmd.timeout;
1330 attr->retry_cnt = cmd.retry_cnt;
1331 attr->rnr_retry = cmd.rnr_retry;
1332 attr->alt_port_num = cmd.alt_port_num;
1333 attr->alt_timeout = cmd.alt_timeout;
1335 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1336 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1337 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1338 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1339 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1340 attr->ah_attr.dlid = cmd.dest.dlid;
1341 attr->ah_attr.sl = cmd.dest.sl;
1342 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1343 attr->ah_attr.static_rate = cmd.dest.static_rate;
1344 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1345 attr->ah_attr.port_num = cmd.dest.port_num;
1347 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1348 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1349 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1350 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1351 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1352 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1353 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1354 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1355 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1356 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1357 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1359 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1374 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1375 const char __user *buf, int in_len,
1378 struct ib_uverbs_destroy_qp cmd;
1379 struct ib_uverbs_destroy_qp_resp resp;
1380 struct ib_uobject *uobj;
1382 struct ib_uqp_object *obj;
1385 if (copy_from_user(&cmd, buf, sizeof cmd))
1388 memset(&resp, 0, sizeof resp);
1390 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1394 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1396 if (!list_empty(&obj->mcast_list)) {
1397 put_uobj_write(uobj);
1401 ret = ib_destroy_qp(qp);
1405 put_uobj_write(uobj);
1410 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1412 mutex_lock(&file->mutex);
1413 list_del(&uobj->list);
1414 mutex_unlock(&file->mutex);
1416 ib_uverbs_release_uevent(file, &obj->uevent);
1418 resp.events_reported = obj->uevent.events_reported;
1422 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1423 &resp, sizeof resp))
1429 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1430 const char __user *buf, int in_len,
1433 struct ib_uverbs_post_send cmd;
1434 struct ib_uverbs_post_send_resp resp;
1435 struct ib_uverbs_send_wr *user_wr;
1436 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1440 ssize_t ret = -EINVAL;
1442 if (copy_from_user(&cmd, buf, sizeof cmd))
1445 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1446 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1449 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1452 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1456 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1460 is_ud = qp->qp_type == IB_QPT_UD;
1463 for (i = 0; i < cmd.wr_count; ++i) {
1464 if (copy_from_user(user_wr,
1465 buf + sizeof cmd + i * cmd.wqe_size,
1471 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1476 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1477 user_wr->num_sge * sizeof (struct ib_sge),
1491 next->wr_id = user_wr->wr_id;
1492 next->num_sge = user_wr->num_sge;
1493 next->opcode = user_wr->opcode;
1494 next->send_flags = user_wr->send_flags;
1497 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1499 if (!next->wr.ud.ah) {
1503 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1504 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1506 switch (next->opcode) {
1507 case IB_WR_RDMA_WRITE_WITH_IMM:
1509 (__be32 __force) user_wr->ex.imm_data;
1510 case IB_WR_RDMA_WRITE:
1511 case IB_WR_RDMA_READ:
1512 next->wr.rdma.remote_addr =
1513 user_wr->wr.rdma.remote_addr;
1514 next->wr.rdma.rkey =
1515 user_wr->wr.rdma.rkey;
1517 case IB_WR_SEND_WITH_IMM:
1519 (__be32 __force) user_wr->ex.imm_data;
1521 case IB_WR_SEND_WITH_INV:
1522 next->ex.invalidate_rkey =
1523 user_wr->ex.invalidate_rkey;
1525 case IB_WR_ATOMIC_CMP_AND_SWP:
1526 case IB_WR_ATOMIC_FETCH_AND_ADD:
1527 next->wr.atomic.remote_addr =
1528 user_wr->wr.atomic.remote_addr;
1529 next->wr.atomic.compare_add =
1530 user_wr->wr.atomic.compare_add;
1531 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1532 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1539 if (next->num_sge) {
1540 next->sg_list = (void *) next +
1541 ALIGN(sizeof *next, sizeof (struct ib_sge));
1542 if (copy_from_user(next->sg_list,
1544 cmd.wr_count * cmd.wqe_size +
1545 sg_ind * sizeof (struct ib_sge),
1546 next->num_sge * sizeof (struct ib_sge))) {
1550 sg_ind += next->num_sge;
1552 next->sg_list = NULL;
1556 ret = qp->device->post_send(qp, wr, &bad_wr);
1558 for (next = wr; next; next = next->next) {
1564 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1565 &resp, sizeof resp))
1572 if (is_ud && wr->wr.ud.ah)
1573 put_ah_read(wr->wr.ud.ah);
1582 return ret ? ret : in_len;
1585 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1591 struct ib_uverbs_recv_wr *user_wr;
1592 struct ib_recv_wr *wr = NULL, *last, *next;
1597 if (in_len < wqe_size * wr_count +
1598 sge_count * sizeof (struct ib_uverbs_sge))
1599 return ERR_PTR(-EINVAL);
1601 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1602 return ERR_PTR(-EINVAL);
1604 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1606 return ERR_PTR(-ENOMEM);
1610 for (i = 0; i < wr_count; ++i) {
1611 if (copy_from_user(user_wr, buf + i * wqe_size,
1617 if (user_wr->num_sge + sg_ind > sge_count) {
1622 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1623 user_wr->num_sge * sizeof (struct ib_sge),
1637 next->wr_id = user_wr->wr_id;
1638 next->num_sge = user_wr->num_sge;
1640 if (next->num_sge) {
1641 next->sg_list = (void *) next +
1642 ALIGN(sizeof *next, sizeof (struct ib_sge));
1643 if (copy_from_user(next->sg_list,
1644 buf + wr_count * wqe_size +
1645 sg_ind * sizeof (struct ib_sge),
1646 next->num_sge * sizeof (struct ib_sge))) {
1650 sg_ind += next->num_sge;
1652 next->sg_list = NULL;
1667 return ERR_PTR(ret);
1670 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1671 const char __user *buf, int in_len,
1674 struct ib_uverbs_post_recv cmd;
1675 struct ib_uverbs_post_recv_resp resp;
1676 struct ib_recv_wr *wr, *next, *bad_wr;
1678 ssize_t ret = -EINVAL;
1680 if (copy_from_user(&cmd, buf, sizeof cmd))
1683 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1684 in_len - sizeof cmd, cmd.wr_count,
1685 cmd.sge_count, cmd.wqe_size);
1689 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1694 ret = qp->device->post_recv(qp, wr, &bad_wr);
1699 for (next = wr; next; next = next->next) {
1705 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1706 &resp, sizeof resp))
1716 return ret ? ret : in_len;
1719 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1720 const char __user *buf, int in_len,
1723 struct ib_uverbs_post_srq_recv cmd;
1724 struct ib_uverbs_post_srq_recv_resp resp;
1725 struct ib_recv_wr *wr, *next, *bad_wr;
1727 ssize_t ret = -EINVAL;
1729 if (copy_from_user(&cmd, buf, sizeof cmd))
1732 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1733 in_len - sizeof cmd, cmd.wr_count,
1734 cmd.sge_count, cmd.wqe_size);
1738 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1743 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1748 for (next = wr; next; next = next->next) {
1754 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1755 &resp, sizeof resp))
1765 return ret ? ret : in_len;
1768 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1769 const char __user *buf, int in_len,
1772 struct ib_uverbs_create_ah cmd;
1773 struct ib_uverbs_create_ah_resp resp;
1774 struct ib_uobject *uobj;
1777 struct ib_ah_attr attr;
1780 if (out_len < sizeof resp)
1783 if (copy_from_user(&cmd, buf, sizeof cmd))
1786 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1790 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1791 down_write(&uobj->mutex);
1793 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1799 attr.dlid = cmd.attr.dlid;
1800 attr.sl = cmd.attr.sl;
1801 attr.src_path_bits = cmd.attr.src_path_bits;
1802 attr.static_rate = cmd.attr.static_rate;
1803 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1804 attr.port_num = cmd.attr.port_num;
1805 attr.grh.flow_label = cmd.attr.grh.flow_label;
1806 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1807 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1808 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1809 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1811 ah = ib_create_ah(pd, &attr);
1820 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1824 resp.ah_handle = uobj->id;
1826 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1827 &resp, sizeof resp)) {
1834 mutex_lock(&file->mutex);
1835 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1836 mutex_unlock(&file->mutex);
1840 up_write(&uobj->mutex);
1845 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1854 put_uobj_write(uobj);
1858 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1859 const char __user *buf, int in_len, int out_len)
1861 struct ib_uverbs_destroy_ah cmd;
1863 struct ib_uobject *uobj;
1866 if (copy_from_user(&cmd, buf, sizeof cmd))
1869 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1874 ret = ib_destroy_ah(ah);
1878 put_uobj_write(uobj);
1883 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1885 mutex_lock(&file->mutex);
1886 list_del(&uobj->list);
1887 mutex_unlock(&file->mutex);
1894 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1895 const char __user *buf, int in_len,
1898 struct ib_uverbs_attach_mcast cmd;
1900 struct ib_uqp_object *obj;
1901 struct ib_uverbs_mcast_entry *mcast;
1904 if (copy_from_user(&cmd, buf, sizeof cmd))
1907 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1911 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1913 list_for_each_entry(mcast, &obj->mcast_list, list)
1914 if (cmd.mlid == mcast->lid &&
1915 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1920 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1926 mcast->lid = cmd.mlid;
1927 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1929 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1931 list_add_tail(&mcast->list, &obj->mcast_list);
1938 return ret ? ret : in_len;
1941 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1942 const char __user *buf, int in_len,
1945 struct ib_uverbs_detach_mcast cmd;
1946 struct ib_uqp_object *obj;
1948 struct ib_uverbs_mcast_entry *mcast;
1951 if (copy_from_user(&cmd, buf, sizeof cmd))
1954 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1958 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1962 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1964 list_for_each_entry(mcast, &obj->mcast_list, list)
1965 if (cmd.mlid == mcast->lid &&
1966 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1967 list_del(&mcast->list);
1975 return ret ? ret : in_len;
1978 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1979 const char __user *buf, int in_len,
1982 struct ib_uverbs_create_srq cmd;
1983 struct ib_uverbs_create_srq_resp resp;
1984 struct ib_udata udata;
1985 struct ib_uevent_object *obj;
1988 struct ib_srq_init_attr attr;
1991 if (out_len < sizeof resp)
1994 if (copy_from_user(&cmd, buf, sizeof cmd))
1997 INIT_UDATA(&udata, buf + sizeof cmd,
1998 (unsigned long) cmd.response + sizeof resp,
1999 in_len - sizeof cmd, out_len - sizeof resp);
2001 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2005 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2006 down_write(&obj->uobject.mutex);
2008 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2014 attr.event_handler = ib_uverbs_srq_event_handler;
2015 attr.srq_context = file;
2016 attr.attr.max_wr = cmd.max_wr;
2017 attr.attr.max_sge = cmd.max_sge;
2018 attr.attr.srq_limit = cmd.srq_limit;
2020 obj->events_reported = 0;
2021 INIT_LIST_HEAD(&obj->event_list);
2023 srq = pd->device->create_srq(pd, &attr, &udata);
2029 srq->device = pd->device;
2031 srq->uobject = &obj->uobject;
2032 srq->event_handler = attr.event_handler;
2033 srq->srq_context = attr.srq_context;
2034 atomic_inc(&pd->usecnt);
2035 atomic_set(&srq->usecnt, 0);
2037 obj->uobject.object = srq;
2038 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2042 memset(&resp, 0, sizeof resp);
2043 resp.srq_handle = obj->uobject.id;
2044 resp.max_wr = attr.attr.max_wr;
2045 resp.max_sge = attr.attr.max_sge;
2047 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2048 &resp, sizeof resp)) {
2055 mutex_lock(&file->mutex);
2056 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2057 mutex_unlock(&file->mutex);
2059 obj->uobject.live = 1;
2061 up_write(&obj->uobject.mutex);
2066 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2069 ib_destroy_srq(srq);
2075 put_uobj_write(&obj->uobject);
2079 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2080 const char __user *buf, int in_len,
2083 struct ib_uverbs_modify_srq cmd;
2084 struct ib_udata udata;
2086 struct ib_srq_attr attr;
2089 if (copy_from_user(&cmd, buf, sizeof cmd))
2092 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2095 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2099 attr.max_wr = cmd.max_wr;
2100 attr.srq_limit = cmd.srq_limit;
2102 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2106 return ret ? ret : in_len;
2109 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2110 const char __user *buf,
2111 int in_len, int out_len)
2113 struct ib_uverbs_query_srq cmd;
2114 struct ib_uverbs_query_srq_resp resp;
2115 struct ib_srq_attr attr;
2119 if (out_len < sizeof resp)
2122 if (copy_from_user(&cmd, buf, sizeof cmd))
2125 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2129 ret = ib_query_srq(srq, &attr);
2136 memset(&resp, 0, sizeof resp);
2138 resp.max_wr = attr.max_wr;
2139 resp.max_sge = attr.max_sge;
2140 resp.srq_limit = attr.srq_limit;
2142 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2143 &resp, sizeof resp))
2149 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2150 const char __user *buf, int in_len,
2153 struct ib_uverbs_destroy_srq cmd;
2154 struct ib_uverbs_destroy_srq_resp resp;
2155 struct ib_uobject *uobj;
2157 struct ib_uevent_object *obj;
2160 if (copy_from_user(&cmd, buf, sizeof cmd))
2163 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2167 obj = container_of(uobj, struct ib_uevent_object, uobject);
2169 ret = ib_destroy_srq(srq);
2173 put_uobj_write(uobj);
2178 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2180 mutex_lock(&file->mutex);
2181 list_del(&uobj->list);
2182 mutex_unlock(&file->mutex);
2184 ib_uverbs_release_uevent(file, obj);
2186 memset(&resp, 0, sizeof resp);
2187 resp.events_reported = obj->events_reported;
2191 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2192 &resp, sizeof resp))
2195 return ret ? ret : in_len;