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authorRoland Dreier <rolandd@cisco.com>2005-07-07 20:57:13 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-07 21:23:48 -0400
commitbc38a6abdd5a50e007d0fcd9b9b6280132b79e62 (patch)
treed811577e4bb3c63847967dfe151c5d07ec7b68c8
parent8a96b3f9af2d0351285665b532f9359d6cd73f42 (diff)
[PATCH] IB uverbs: core implementation
Add the core of the InfiniBand userspace verbs implementation, including creating character device nodes, dispatching requests from userspace, and passing event notifications back up to userspace. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat
-rw-r--r--drivers/infiniband/core/uverbs.h132
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c1006
-rw-r--r--drivers/infiniband/core/uverbs_main.c698
3 files changed, 1836 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
new file mode 100644
index 000000000000..57347f1e82c1
--- /dev/null
+++ b/drivers/infiniband/core/uverbs.h
@@ -0,0 +1,132 @@
1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 * $Id: uverbs.h 2559 2005-06-06 19:43:16Z roland $
34 */
35
36#ifndef UVERBS_H
37#define UVERBS_H
38
39/* Include device.h and fs.h until cdev.h is self-sufficient */
40#include <linux/fs.h>
41#include <linux/device.h>
42#include <linux/cdev.h>
43#include <linux/kref.h>
44#include <linux/idr.h>
45
46#include <ib_verbs.h>
47#include <ib_user_verbs.h>
48
49struct ib_uverbs_device {
50 int devnum;
51 struct cdev dev;
52 struct class_device class_dev;
53 struct ib_device *ib_dev;
54 int num_comp;
55};
56
57struct ib_uverbs_event_file {
58 struct kref ref;
59 struct ib_uverbs_file *uverbs_file;
60 spinlock_t lock;
61 int fd;
62 int is_async;
63 wait_queue_head_t poll_wait;
64 struct list_head event_list;
65};
66
67struct ib_uverbs_file {
68 struct kref ref;
69 struct ib_uverbs_device *device;
70 struct ib_ucontext *ucontext;
71 struct ib_event_handler event_handler;
72 struct ib_uverbs_event_file async_file;
73 struct ib_uverbs_event_file comp_file[1];
74};
75
76struct ib_uverbs_async_event {
77 struct ib_uverbs_async_event_desc desc;
78 struct list_head list;
79};
80
81struct ib_uverbs_comp_event {
82 struct ib_uverbs_comp_event_desc desc;
83 struct list_head list;
84};
85
86struct ib_uobject_mr {
87 struct ib_uobject uobj;
88 struct page *page_list;
89 struct scatterlist *sg_list;
90};
91
92extern struct semaphore ib_uverbs_idr_mutex;
93extern struct idr ib_uverbs_pd_idr;
94extern struct idr ib_uverbs_mr_idr;
95extern struct idr ib_uverbs_mw_idr;
96extern struct idr ib_uverbs_ah_idr;
97extern struct idr ib_uverbs_cq_idr;
98extern struct idr ib_uverbs_qp_idr;
99
100void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
101void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
102void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
103
104int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
105 void *addr, size_t size, int write);
106void ib_umem_release(struct ib_device *dev, struct ib_umem *umem);
107void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);
108
109#define IB_UVERBS_DECLARE_CMD(name) \
110 ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
111 const char __user *buf, int in_len, \
112 int out_len)
113
114IB_UVERBS_DECLARE_CMD(query_params);
115IB_UVERBS_DECLARE_CMD(get_context);
116IB_UVERBS_DECLARE_CMD(query_device);
117IB_UVERBS_DECLARE_CMD(query_port);
118IB_UVERBS_DECLARE_CMD(query_gid);
119IB_UVERBS_DECLARE_CMD(query_pkey);
120IB_UVERBS_DECLARE_CMD(alloc_pd);
121IB_UVERBS_DECLARE_CMD(dealloc_pd);
122IB_UVERBS_DECLARE_CMD(reg_mr);
123IB_UVERBS_DECLARE_CMD(dereg_mr);
124IB_UVERBS_DECLARE_CMD(create_cq);
125IB_UVERBS_DECLARE_CMD(destroy_cq);
126IB_UVERBS_DECLARE_CMD(create_qp);
127IB_UVERBS_DECLARE_CMD(modify_qp);
128IB_UVERBS_DECLARE_CMD(destroy_qp);
129IB_UVERBS_DECLARE_CMD(attach_mcast);
130IB_UVERBS_DECLARE_CMD(detach_mcast);
131
132#endif /* UVERBS_H */
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
new file mode 100644
index 000000000000..5f2bbcda4c73
--- /dev/null
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -0,0 +1,1006 @@
1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
34 */
35
36#include <asm/uaccess.h>
37
38#include "uverbs.h"
39
40#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
41 do { \
42 (udata)->inbuf = (void __user *) (ibuf); \
43 (udata)->outbuf = (void __user *) (obuf); \
44 (udata)->inlen = (ilen); \
45 (udata)->outlen = (olen); \
46 } while (0)
47
48ssize_t ib_uverbs_query_params(struct ib_uverbs_file *file,
49 const char __user *buf,
50 int in_len, int out_len)
51{
52 struct ib_uverbs_query_params cmd;
53 struct ib_uverbs_query_params_resp resp;
54
55 if (out_len < sizeof resp)
56 return -ENOSPC;
57
58 if (copy_from_user(&cmd, buf, sizeof cmd))
59 return -EFAULT;
60
61 memset(&resp, 0, sizeof resp);
62
63 resp.num_cq_events = file->device->num_comp;
64
65 if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp))
66 return -EFAULT;
67
68 return in_len;
69}
70
71ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
72 const char __user *buf,
73 int in_len, int out_len)
74{
75 struct ib_uverbs_get_context cmd;
76 struct ib_uverbs_get_context_resp resp;
77 struct ib_udata udata;
78 struct ib_device *ibdev = file->device->ib_dev;
79 int i;
80 int ret = in_len;
81
82 if (out_len < sizeof resp)
83 return -ENOSPC;
84
85 if (copy_from_user(&cmd, buf, sizeof cmd))
86 return -EFAULT;
87
88 INIT_UDATA(&udata, buf + sizeof cmd,
89 (unsigned long) cmd.response + sizeof resp,
90 in_len - sizeof cmd, out_len - sizeof resp);
91
92 file->ucontext = ibdev->alloc_ucontext(ibdev, &udata);
93 if (IS_ERR(file->ucontext)) {
94 ret = PTR_ERR(file->ucontext);
95 file->ucontext = NULL;
96 return ret;
97 }
98
99 file->ucontext->device = ibdev;
100 INIT_LIST_HEAD(&file->ucontext->pd_list);
101 INIT_LIST_HEAD(&file->ucontext->mr_list);
102 INIT_LIST_HEAD(&file->ucontext->mw_list);
103 INIT_LIST_HEAD(&file->ucontext->cq_list);
104 INIT_LIST_HEAD(&file->ucontext->qp_list);
105 INIT_LIST_HEAD(&file->ucontext->srq_list);
106 INIT_LIST_HEAD(&file->ucontext->ah_list);
107 spin_lock_init(&file->ucontext->lock);
108
109 resp.async_fd = file->async_file.fd;
110 for (i = 0; i < file->device->num_comp; ++i)
111 if (copy_to_user((void __user *) (unsigned long) cmd.cq_fd_tab +
112 i * sizeof (__u32),
113 &file->comp_file[i].fd, sizeof (__u32)))
114 goto err;
115
116 if (copy_to_user((void __user *) (unsigned long) cmd.response,
117 &resp, sizeof resp))
118 goto err;
119
120 return in_len;
121
122err:
123 ibdev->dealloc_ucontext(file->ucontext);
124 file->ucontext = NULL;
125
126 return -EFAULT;
127}
128
129ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
130 const char __user *buf,
131 int in_len, int out_len)
132{
133 struct ib_uverbs_query_device cmd;
134 struct ib_uverbs_query_device_resp resp;
135 struct ib_device_attr attr;
136 int ret;
137
138 if (out_len < sizeof resp)
139 return -ENOSPC;
140
141 if (copy_from_user(&cmd, buf, sizeof cmd))
142 return -EFAULT;
143
144 ret = ib_query_device(file->device->ib_dev, &attr);
145 if (ret)
146 return ret;
147
148 memset(&resp, 0, sizeof resp);
149
150 resp.fw_ver = attr.fw_ver;
151 resp.node_guid = attr.node_guid;
152 resp.sys_image_guid = attr.sys_image_guid;
153 resp.max_mr_size = attr.max_mr_size;
154 resp.page_size_cap = attr.page_size_cap;
155 resp.vendor_id = attr.vendor_id;
156 resp.vendor_part_id = attr.vendor_part_id;
157 resp.hw_ver = attr.hw_ver;
158 resp.max_qp = attr.max_qp;
159 resp.max_qp_wr = attr.max_qp_wr;
160 resp.device_cap_flags = attr.device_cap_flags;
161 resp.max_sge = attr.max_sge;
162 resp.max_sge_rd = attr.max_sge_rd;
163 resp.max_cq = attr.max_cq;
164 resp.max_cqe = attr.max_cqe;
165 resp.max_mr = attr.max_mr;
166 resp.max_pd = attr.max_pd;
167 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
168 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
169 resp.max_res_rd_atom = attr.max_res_rd_atom;
170 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
171 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
172 resp.atomic_cap = attr.atomic_cap;
173 resp.max_ee = attr.max_ee;
174 resp.max_rdd = attr.max_rdd;
175 resp.max_mw = attr.max_mw;
176 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
177 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
178 resp.max_mcast_grp = attr.max_mcast_grp;
179 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
180 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
181 resp.max_ah = attr.max_ah;
182 resp.max_fmr = attr.max_fmr;
183 resp.max_map_per_fmr = attr.max_map_per_fmr;
184 resp.max_srq = attr.max_srq;
185 resp.max_srq_wr = attr.max_srq_wr;
186 resp.max_srq_sge = attr.max_srq_sge;
187 resp.max_pkeys = attr.max_pkeys;
188 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
189 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
190
191 if (copy_to_user((void __user *) (unsigned long) cmd.response,
192 &resp, sizeof resp))
193 return -EFAULT;
194
195 return in_len;
196}
197
198ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
199 const char __user *buf,
200 int in_len, int out_len)
201{
202 struct ib_uverbs_query_port cmd;
203 struct ib_uverbs_query_port_resp resp;
204 struct ib_port_attr attr;
205 int ret;
206
207 if (out_len < sizeof resp)
208 return -ENOSPC;
209
210 if (copy_from_user(&cmd, buf, sizeof cmd))
211 return -EFAULT;
212
213 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
214 if (ret)
215 return ret;
216
217 memset(&resp, 0, sizeof resp);
218
219 resp.state = attr.state;
220 resp.max_mtu = attr.max_mtu;
221 resp.active_mtu = attr.active_mtu;
222 resp.gid_tbl_len = attr.gid_tbl_len;
223 resp.port_cap_flags = attr.port_cap_flags;
224 resp.max_msg_sz = attr.max_msg_sz;
225 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
226 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
227 resp.pkey_tbl_len = attr.pkey_tbl_len;
228 resp.lid = attr.lid;
229 resp.sm_lid = attr.sm_lid;
230 resp.lmc = attr.lmc;
231 resp.max_vl_num = attr.max_vl_num;
232 resp.sm_sl = attr.sm_sl;
233 resp.subnet_timeout = attr.subnet_timeout;
234 resp.init_type_reply = attr.init_type_reply;
235 resp.active_width = attr.active_width;
236 resp.active_speed = attr.active_speed;
237 resp.phys_state = attr.phys_state;
238
239 if (copy_to_user((void __user *) (unsigned long) cmd.response,
240 &resp, sizeof resp))
241 return -EFAULT;
242
243 return in_len;
244}
245
246ssize_t ib_uverbs_query_gid(struct ib_uverbs_file *file,
247 const char __user *buf,
248 int in_len, int out_len)
249{
250 struct ib_uverbs_query_gid cmd;
251 struct ib_uverbs_query_gid_resp resp;
252 int ret;
253
254 if (out_len < sizeof resp)
255 return -ENOSPC;
256
257 if (copy_from_user(&cmd, buf, sizeof cmd))
258 return -EFAULT;
259
260 memset(&resp, 0, sizeof resp);
261
262 ret = ib_query_gid(file->device->ib_dev, cmd.port_num, cmd.index,
263 (union ib_gid *) resp.gid);
264 if (ret)
265 return ret;
266
267 if (copy_to_user((void __user *) (unsigned long) cmd.response,
268 &resp, sizeof resp))
269 return -EFAULT;
270
271 return in_len;
272}
273
274ssize_t ib_uverbs_query_pkey(struct ib_uverbs_file *file,
275 const char __user *buf,
276 int in_len, int out_len)
277{
278 struct ib_uverbs_query_pkey cmd;
279 struct ib_uverbs_query_pkey_resp resp;
280 int ret;
281
282 if (out_len < sizeof resp)
283 return -ENOSPC;
284
285 if (copy_from_user(&cmd, buf, sizeof cmd))
286 return -EFAULT;
287
288 memset(&resp, 0, sizeof resp);
289
290 ret = ib_query_pkey(file->device->ib_dev, cmd.port_num, cmd.index,
291 &resp.pkey);
292 if (ret)
293 return ret;
294
295 if (copy_to_user((void __user *) (unsigned long) cmd.response,
296 &resp, sizeof resp))
297 return -EFAULT;
298
299 return in_len;
300}
301
302ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
303 const char __user *buf,
304 int in_len, int out_len)
305{
306 struct ib_uverbs_alloc_pd cmd;
307 struct ib_uverbs_alloc_pd_resp resp;
308 struct ib_udata udata;
309 struct ib_uobject *uobj;
310 struct ib_pd *pd;
311 int ret;
312
313 if (out_len < sizeof resp)
314 return -ENOSPC;
315
316 if (copy_from_user(&cmd, buf, sizeof cmd))
317 return -EFAULT;
318
319 INIT_UDATA(&udata, buf + sizeof cmd,
320 (unsigned long) cmd.response + sizeof resp,
321 in_len - sizeof cmd, out_len - sizeof resp);
322
323 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
324 if (!uobj)
325 return -ENOMEM;
326
327 uobj->context = file->ucontext;
328
329 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
330 file->ucontext, &udata);
331 if (IS_ERR(pd)) {
332 ret = PTR_ERR(pd);
333 goto err;
334 }
335
336 pd->device = file->device->ib_dev;
337 pd->uobject = uobj;
338 atomic_set(&pd->usecnt, 0);
339
340retry:
341 if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
342 ret = -ENOMEM;
343 goto err_pd;
344 }
345
346 down(&ib_uverbs_idr_mutex);
347 ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
348 up(&ib_uverbs_idr_mutex);
349
350 if (ret == -EAGAIN)
351 goto retry;
352 if (ret)
353 goto err_pd;
354
355 spin_lock_irq(&file->ucontext->lock);
356 list_add_tail(&uobj->list, &file->ucontext->pd_list);
357 spin_unlock_irq(&file->ucontext->lock);
358
359 memset(&resp, 0, sizeof resp);
360 resp.pd_handle = uobj->id;
361
362 if (copy_to_user((void __user *) (unsigned long) cmd.response,
363 &resp, sizeof resp)) {
364 ret = -EFAULT;
365 goto err_list;
366 }
367
368 return in_len;
369
370err_list:
371 spin_lock_irq(&file->ucontext->lock);
372 list_del(&uobj->list);
373 spin_unlock_irq(&file->ucontext->lock);
374
375 down(&ib_uverbs_idr_mutex);
376 idr_remove(&ib_uverbs_pd_idr, uobj->id);
377 up(&ib_uverbs_idr_mutex);
378
379err_pd:
380 ib_dealloc_pd(pd);
381
382err:
383 kfree(uobj);
384 return ret;
385}
386
387ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
388 const char __user *buf,
389 int in_len, int out_len)
390{
391 struct ib_uverbs_dealloc_pd cmd;
392 struct ib_pd *pd;
393 struct ib_uobject *uobj;
394 int ret = -EINVAL;
395
396 if (copy_from_user(&cmd, buf, sizeof cmd))
397 return -EFAULT;
398
399 down(&ib_uverbs_idr_mutex);
400
401 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
402 if (!pd || pd->uobject->context != file->ucontext)
403 goto out;
404
405 uobj = pd->uobject;
406
407 ret = ib_dealloc_pd(pd);
408 if (ret)
409 goto out;
410
411 idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
412
413 spin_lock_irq(&file->ucontext->lock);
414 list_del(&uobj->list);
415 spin_unlock_irq(&file->ucontext->lock);
416
417 kfree(uobj);
418
419out:
420 up(&ib_uverbs_idr_mutex);
421
422 return ret ? ret : in_len;
423}
424
425ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
426 const char __user *buf, int in_len,
427 int out_len)
428{
429 struct ib_uverbs_reg_mr cmd;
430 struct ib_uverbs_reg_mr_resp resp;
431 struct ib_udata udata;
432 struct ib_umem_object *obj;
433 struct ib_pd *pd;
434 struct ib_mr *mr;
435 int ret;
436
437 if (out_len < sizeof resp)
438 return -ENOSPC;
439
440 if (copy_from_user(&cmd, buf, sizeof cmd))
441 return -EFAULT;
442
443 INIT_UDATA(&udata, buf + sizeof cmd,
444 (unsigned long) cmd.response + sizeof resp,
445 in_len - sizeof cmd, out_len - sizeof resp);
446
447 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
448 return -EINVAL;
449
450 obj = kmalloc(sizeof *obj, GFP_KERNEL);
451 if (!obj)
452 return -ENOMEM;
453
454 obj->uobject.context = file->ucontext;
455
456 /*
457 * We ask for writable memory if any access flags other than
458 * "remote read" are set. "Local write" and "remote write"
459 * obviously require write access. "Remote atomic" can do
460 * things like fetch and add, which will modify memory, and
461 * "MW bind" can change permissions by binding a window.
462 */
463 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
464 (void *) (unsigned long) cmd.start, cmd.length,
465 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
466 if (ret)
467 goto err_free;
468
469 obj->umem.virt_base = cmd.hca_va;
470
471 down(&ib_uverbs_idr_mutex);
472
473 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
474 if (!pd || pd->uobject->context != file->ucontext) {
475 ret = -EINVAL;
476 goto err_up;
477 }
478
479 if (!pd->device->reg_user_mr) {
480 ret = -ENOSYS;
481 goto err_up;
482 }
483
484 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
485 if (IS_ERR(mr)) {
486 ret = PTR_ERR(mr);
487 goto err_up;
488 }
489
490 mr->device = pd->device;
491 mr->pd = pd;
492 mr->uobject = &obj->uobject;
493 atomic_inc(&pd->usecnt);
494 atomic_set(&mr->usecnt, 0);
495
496 memset(&resp, 0, sizeof resp);
497 resp.lkey = mr->lkey;
498 resp.rkey = mr->rkey;
499
500retry:
501 if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
502 ret = -ENOMEM;
503 goto err_unreg;
504 }
505
506 ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
507
508 if (ret == -EAGAIN)
509 goto retry;
510 if (ret)
511 goto err_unreg;
512
513 resp.mr_handle = obj->uobject.id;
514
515 spin_lock_irq(&file->ucontext->lock);
516 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
517 spin_unlock_irq(&file->ucontext->lock);
518
519 if (copy_to_user((void __user *) (unsigned long) cmd.response,
520 &resp, sizeof resp)) {
521 ret = -EFAULT;
522 goto err_list;
523 }
524
525 up(&ib_uverbs_idr_mutex);
526
527 return in_len;
528
529err_list:
530 spin_lock_irq(&file->ucontext->lock);
531 list_del(&obj->uobject.list);
532 spin_unlock_irq(&file->ucontext->lock);
533
534err_unreg:
535 ib_dereg_mr(mr);
536
537err_up:
538 up(&ib_uverbs_idr_mutex);
539
540 ib_umem_release(file->device->ib_dev, &obj->umem);
541
542err_free:
543 kfree(obj);
544 return ret;
545}
546
547ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
548 const char __user *buf, int in_len,
549 int out_len)
550{
551 struct ib_uverbs_dereg_mr cmd;
552 struct ib_mr *mr;
553 struct ib_umem_object *memobj;
554 int ret = -EINVAL;
555
556 if (copy_from_user(&cmd, buf, sizeof cmd))
557 return -EFAULT;
558
559 down(&ib_uverbs_idr_mutex);
560
561 mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
562 if (!mr || mr->uobject->context != file->ucontext)
563 goto out;
564
565 memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
566
567 ret = ib_dereg_mr(mr);
568 if (ret)
569 goto out;
570
571 idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
572
573 spin_lock_irq(&file->ucontext->lock);
574 list_del(&memobj->uobject.list);
575 spin_unlock_irq(&file->ucontext->lock);
576
577 ib_umem_release(file->device->ib_dev, &memobj->umem);
578 kfree(memobj);
579
580out:
581 up(&ib_uverbs_idr_mutex);
582
583 return ret ? ret : in_len;
584}
585
586ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
587 const char __user *buf, int in_len,
588 int out_len)
589{
590 struct ib_uverbs_create_cq cmd;
591 struct ib_uverbs_create_cq_resp resp;
592 struct ib_udata udata;
593 struct ib_uobject *uobj;
594 struct ib_cq *cq;
595 int ret;
596
597 if (out_len < sizeof resp)
598 return -ENOSPC;
599
600 if (copy_from_user(&cmd, buf, sizeof cmd))
601 return -EFAULT;
602
603 INIT_UDATA(&udata, buf + sizeof cmd,
604 (unsigned long) cmd.response + sizeof resp,
605 in_len - sizeof cmd, out_len - sizeof resp);
606
607 if (cmd.event_handler >= file->device->num_comp)
608 return -EINVAL;
609
610 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
611 if (!uobj)
612 return -ENOMEM;
613
614 uobj->user_handle = cmd.user_handle;
615 uobj->context = file->ucontext;
616
617 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
618 file->ucontext, &udata);
619 if (IS_ERR(cq)) {
620 ret = PTR_ERR(cq);
621 goto err;
622 }
623
624 cq->device = file->device->ib_dev;
625 cq->uobject = uobj;
626 cq->comp_handler = ib_uverbs_comp_handler;
627 cq->event_handler = ib_uverbs_cq_event_handler;
628 cq->cq_context = file;
629 atomic_set(&cq->usecnt, 0);
630
631retry:
632 if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
633 ret = -ENOMEM;
634 goto err_cq;
635 }
636
637 down(&ib_uverbs_idr_mutex);
638 ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->id);
639 up(&ib_uverbs_idr_mutex);
640
641 if (ret == -EAGAIN)
642 goto retry;
643 if (ret)
644 goto err_cq;
645
646 spin_lock_irq(&file->ucontext->lock);
647 list_add_tail(&uobj->list, &file->ucontext->cq_list);
648 spin_unlock_irq(&file->ucontext->lock);
649
650 memset(&resp, 0, sizeof resp);
651 resp.cq_handle = uobj->id;
652 resp.cqe = cq->cqe;
653
654 if (copy_to_user((void __user *) (unsigned long) cmd.response,
655 &resp, sizeof resp)) {
656 ret = -EFAULT;
657 goto err_list;
658 }
659
660 return in_len;
661
662err_list:
663 spin_lock_irq(&file->ucontext->lock);
664 list_del(&uobj->list);
665 spin_unlock_irq(&file->ucontext->lock);
666
667 down(&ib_uverbs_idr_mutex);
668 idr_remove(&ib_uverbs_cq_idr, uobj->id);
669 up(&ib_uverbs_idr_mutex);
670
671err_cq:
672 ib_destroy_cq(cq);
673
674err:
675 kfree(uobj);
676 return ret;
677}
678
679ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
680 const char __user *buf, int in_len,
681 int out_len)
682{
683 struct ib_uverbs_destroy_cq cmd;
684 struct ib_cq *cq;
685 struct ib_uobject *uobj;
686 int ret = -EINVAL;
687
688 if (copy_from_user(&cmd, buf, sizeof cmd))
689 return -EFAULT;
690
691 down(&ib_uverbs_idr_mutex);
692
693 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
694 if (!cq || cq->uobject->context != file->ucontext)
695 goto out;
696
697 uobj = cq->uobject;
698
699 ret = ib_destroy_cq(cq);
700 if (ret)
701 goto out;
702
703 idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
704
705 spin_lock_irq(&file->ucontext->lock);
706 list_del(&uobj->list);
707 spin_unlock_irq(&file->ucontext->lock);
708
709 kfree(uobj);
710
711out:
712 up(&ib_uverbs_idr_mutex);
713
714 return ret ? ret : in_len;
715}
716
717ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
718 const char __user *buf, int in_len,
719 int out_len)
720{
721 struct ib_uverbs_create_qp cmd;
722 struct ib_uverbs_create_qp_resp resp;
723 struct ib_udata udata;
724 struct ib_uobject *uobj;
725 struct ib_pd *pd;
726 struct ib_cq *scq, *rcq;
727 struct ib_qp *qp;
728 struct ib_qp_init_attr attr;
729 int ret;
730
731 if (out_len < sizeof resp)
732 return -ENOSPC;
733
734 if (copy_from_user(&cmd, buf, sizeof cmd))
735 return -EFAULT;
736
737 INIT_UDATA(&udata, buf + sizeof cmd,
738 (unsigned long) cmd.response + sizeof resp,
739 in_len - sizeof cmd, out_len - sizeof resp);
740
741 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
742 if (!uobj)
743 return -ENOMEM;
744
745 down(&ib_uverbs_idr_mutex);
746
747 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
748 scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
749 rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
750
751 if (!pd || pd->uobject->context != file->ucontext ||
752 !scq || scq->uobject->context != file->ucontext ||
753 !rcq || rcq->uobject->context != file->ucontext) {
754 ret = -EINVAL;
755 goto err_up;
756 }
757
758 attr.event_handler = ib_uverbs_qp_event_handler;
759 attr.qp_context = file;
760 attr.send_cq = scq;
761 attr.recv_cq = rcq;
762 attr.srq = NULL;
763 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
764 attr.qp_type = cmd.qp_type;
765
766 attr.cap.max_send_wr = cmd.max_send_wr;
767 attr.cap.max_recv_wr = cmd.max_recv_wr;
768 attr.cap.max_send_sge = cmd.max_send_sge;
769 attr.cap.max_recv_sge = cmd.max_recv_sge;
770 attr.cap.max_inline_data = cmd.max_inline_data;
771
772 uobj->user_handle = cmd.user_handle;
773 uobj->context = file->ucontext;
774
775 qp = pd->device->create_qp(pd, &attr, &udata);
776 if (IS_ERR(qp)) {
777 ret = PTR_ERR(qp);
778 goto err_up;
779 }
780
781 qp->device = pd->device;
782 qp->pd = pd;
783 qp->send_cq = attr.send_cq;
784 qp->recv_cq = attr.recv_cq;
785 qp->srq = attr.srq;
786 qp->uobject = uobj;
787 qp->event_handler = attr.event_handler;
788 qp->qp_context = attr.qp_context;
789 qp->qp_type = attr.qp_type;
790 atomic_inc(&pd->usecnt);
791 atomic_inc(&attr.send_cq->usecnt);
792 atomic_inc(&attr.recv_cq->usecnt);
793 if (attr.srq)
794 atomic_inc(&attr.srq->usecnt);
795
796 memset(&resp, 0, sizeof resp);
797 resp.qpn = qp->qp_num;
798
799retry:
800 if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
801 ret = -ENOMEM;
802 goto err_destroy;
803 }
804
805 ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->id);
806
807 if (ret == -EAGAIN)
808 goto retry;
809 if (ret)
810 goto err_destroy;
811
812 resp.qp_handle = uobj->id;
813
814 spin_lock_irq(&file->ucontext->lock);
815 list_add_tail(&uobj->list, &file->ucontext->qp_list);
816 spin_unlock_irq(&file->ucontext->lock);
817
818 if (copy_to_user((void __user *) (unsigned long) cmd.response,
819 &resp, sizeof resp)) {
820 ret = -EFAULT;
821 goto err_list;
822 }
823
824 up(&ib_uverbs_idr_mutex);
825
826 return in_len;
827
828err_list:
829 spin_lock_irq(&file->ucontext->lock);
830 list_del(&uobj->list);
831 spin_unlock_irq(&file->ucontext->lock);
832
833err_destroy:
834 ib_destroy_qp(qp);
835
836err_up:
837 up(&ib_uverbs_idr_mutex);
838
839 kfree(uobj);
840 return ret;
841}
842
843ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
844 const char __user *buf, int in_len,
845 int out_len)
846{
847 struct ib_uverbs_modify_qp cmd;
848 struct ib_qp *qp;
849 struct ib_qp_attr *attr;
850 int ret;
851
852 if (copy_from_user(&cmd, buf, sizeof cmd))
853 return -EFAULT;
854
855 attr = kmalloc(sizeof *attr, GFP_KERNEL);
856 if (!attr)
857 return -ENOMEM;
858
859 down(&ib_uverbs_idr_mutex);
860
861 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
862 if (!qp || qp->uobject->context != file->ucontext) {
863 ret = -EINVAL;
864 goto out;
865 }
866
867 attr->qp_state = cmd.qp_state;
868 attr->cur_qp_state = cmd.cur_qp_state;
869 attr->path_mtu = cmd.path_mtu;
870 attr->path_mig_state = cmd.path_mig_state;
871 attr->qkey = cmd.qkey;
872 attr->rq_psn = cmd.rq_psn;
873 attr->sq_psn = cmd.sq_psn;
874 attr->dest_qp_num = cmd.dest_qp_num;
875 attr->qp_access_flags = cmd.qp_access_flags;
876 attr->pkey_index = cmd.pkey_index;
877 attr->alt_pkey_index = cmd.pkey_index;
878 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
879 attr->max_rd_atomic = cmd.max_rd_atomic;
880 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
881 attr->min_rnr_timer = cmd.min_rnr_timer;
882 attr->port_num = cmd.port_num;
883 attr->timeout = cmd.timeout;
884 attr->retry_cnt = cmd.retry_cnt;
885 attr->rnr_retry = cmd.rnr_retry;
886 attr->alt_port_num = cmd.alt_port_num;
887 attr->alt_timeout = cmd.alt_timeout;
888
889 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
890 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
891 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
892 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
893 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
894 attr->ah_attr.dlid = cmd.dest.dlid;
895 attr->ah_attr.sl = cmd.dest.sl;
896 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
897 attr->ah_attr.static_rate = cmd.dest.static_rate;
898 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
899 attr->ah_attr.port_num = cmd.dest.port_num;
900
901 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
902 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
903 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
904 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
905 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
906 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
907 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
908 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
909 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
910 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
911 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
912
913 ret = ib_modify_qp(qp, attr, cmd.attr_mask);
914 if (ret)
915 goto out;
916
917 ret = in_len;
918
919out:
920 up(&ib_uverbs_idr_mutex);
921 kfree(attr);
922
923 return ret;
924}
925
926ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
927 const char __user *buf, int in_len,
928 int out_len)
929{
930 struct ib_uverbs_destroy_qp cmd;
931 struct ib_qp *qp;
932 struct ib_uobject *uobj;
933 int ret = -EINVAL;
934
935 if (copy_from_user(&cmd, buf, sizeof cmd))
936 return -EFAULT;
937
938 down(&ib_uverbs_idr_mutex);
939
940 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
941 if (!qp || qp->uobject->context != file->ucontext)
942 goto out;
943
944 uobj = qp->uobject;
945
946 ret = ib_destroy_qp(qp);
947 if (ret)
948 goto out;
949
950 idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
951
952 spin_lock_irq(&file->ucontext->lock);
953 list_del(&uobj->list);
954 spin_unlock_irq(&file->ucontext->lock);
955
956 kfree(uobj);
957
958out:
959 up(&ib_uverbs_idr_mutex);
960
961 return ret ? ret : in_len;
962}
963
964ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
965 const char __user *buf, int in_len,
966 int out_len)
967{
968 struct ib_uverbs_attach_mcast cmd;
969 struct ib_qp *qp;
970 int ret = -EINVAL;
971
972 if (copy_from_user(&cmd, buf, sizeof cmd))
973 return -EFAULT;
974
975 down(&ib_uverbs_idr_mutex);
976
977 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
978 if (qp && qp->uobject->context == file->ucontext)
979 ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
980
981 up(&ib_uverbs_idr_mutex);
982
983 return ret ? ret : in_len;
984}
985
986ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
987 const char __user *buf, int in_len,
988 int out_len)
989{
990 struct ib_uverbs_detach_mcast cmd;
991 struct ib_qp *qp;
992 int ret = -EINVAL;
993
994 if (copy_from_user(&cmd, buf, sizeof cmd))
995 return -EFAULT;
996
997 down(&ib_uverbs_idr_mutex);
998
999 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1000 if (qp && qp->uobject->context == file->ucontext)
1001 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1002
1003 up(&ib_uverbs_idr_mutex);
1004
1005 return ret ? ret : in_len;
1006}
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
new file mode 100644
index 000000000000..fbbe03d8c901
--- /dev/null
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -0,0 +1,698 @@
1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 * $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
34 */
35
36#include <linux/module.h>
37#include <linux/init.h>
38#include <linux/device.h>
39#include <linux/err.h>
40#include <linux/fs.h>
41#include <linux/poll.h>
42#include <linux/file.h>
43#include <linux/mount.h>
44
45#include <asm/uaccess.h>
46
47#include "uverbs.h"
48
49MODULE_AUTHOR("Roland Dreier");
50MODULE_DESCRIPTION("InfiniBand userspace verbs access");
51MODULE_LICENSE("Dual BSD/GPL");
52
53#define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
54
55enum {
56 IB_UVERBS_MAJOR = 231,
57 IB_UVERBS_BASE_MINOR = 192,
58 IB_UVERBS_MAX_DEVICES = 32
59};
60
61#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
62
63DECLARE_MUTEX(ib_uverbs_idr_mutex);
64DEFINE_IDR(ib_uverbs_pd_idr);
65DEFINE_IDR(ib_uverbs_mr_idr);
66DEFINE_IDR(ib_uverbs_mw_idr);
67DEFINE_IDR(ib_uverbs_ah_idr);
68DEFINE_IDR(ib_uverbs_cq_idr);
69DEFINE_IDR(ib_uverbs_qp_idr);
70
71static spinlock_t map_lock;
72static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
73
74static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
75 const char __user *buf, int in_len,
76 int out_len) = {
77 [IB_USER_VERBS_CMD_QUERY_PARAMS] = ib_uverbs_query_params,
78 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
79 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
80 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
81 [IB_USER_VERBS_CMD_QUERY_GID] = ib_uverbs_query_gid,
82 [IB_USER_VERBS_CMD_QUERY_PKEY] = ib_uverbs_query_pkey,
83 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
84 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
85 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
86 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
87 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
88 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
89 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
90 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
91 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
92 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
93 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
94};
95
96static struct vfsmount *uverbs_event_mnt;
97
98static void ib_uverbs_add_one(struct ib_device *device);
99static void ib_uverbs_remove_one(struct ib_device *device);
100
101static int ib_dealloc_ucontext(struct ib_ucontext *context)
102{
103 struct ib_uobject *uobj, *tmp;
104
105 if (!context)
106 return 0;
107
108 down(&ib_uverbs_idr_mutex);
109
110 /* XXX Free AHs */
111
112 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
113 struct ib_qp *qp = idr_find(&ib_uverbs_qp_idr, uobj->id);
114 idr_remove(&ib_uverbs_qp_idr, uobj->id);
115 ib_destroy_qp(qp);
116 list_del(&uobj->list);
117 kfree(uobj);
118 }
119
120 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
121 struct ib_cq *cq = idr_find(&ib_uverbs_cq_idr, uobj->id);
122 idr_remove(&ib_uverbs_cq_idr, uobj->id);
123 ib_destroy_cq(cq);
124 list_del(&uobj->list);
125 kfree(uobj);
126 }
127
128 /* XXX Free SRQs */
129 /* XXX Free MWs */
130
131 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
132 struct ib_mr *mr = idr_find(&ib_uverbs_mr_idr, uobj->id);
133 struct ib_umem_object *memobj;
134
135 idr_remove(&ib_uverbs_mr_idr, uobj->id);
136 ib_dereg_mr(mr);
137
138 memobj = container_of(uobj, struct ib_umem_object, uobject);
139 ib_umem_release_on_close(mr->device, &memobj->umem);
140
141 list_del(&uobj->list);
142 kfree(memobj);
143 }
144
145 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
146 struct ib_pd *pd = idr_find(&ib_uverbs_pd_idr, uobj->id);
147 idr_remove(&ib_uverbs_pd_idr, uobj->id);
148 ib_dealloc_pd(pd);
149 list_del(&uobj->list);
150 kfree(uobj);
151 }
152
153 up(&ib_uverbs_idr_mutex);
154
155 return context->device->dealloc_ucontext(context);
156}
157
158static void ib_uverbs_release_file(struct kref *ref)
159{
160 struct ib_uverbs_file *file =
161 container_of(ref, struct ib_uverbs_file, ref);
162
163 module_put(file->device->ib_dev->owner);
164 kfree(file);
165}
166
167static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
168 size_t count, loff_t *pos)
169{
170 struct ib_uverbs_event_file *file = filp->private_data;
171 void *event;
172 int eventsz;
173 int ret = 0;
174
175 spin_lock_irq(&file->lock);
176
177 while (list_empty(&file->event_list) && file->fd >= 0) {
178 spin_unlock_irq(&file->lock);
179
180 if (filp->f_flags & O_NONBLOCK)
181 return -EAGAIN;
182
183 if (wait_event_interruptible(file->poll_wait,
184 !list_empty(&file->event_list) ||
185 file->fd < 0))
186 return -ERESTARTSYS;
187
188 spin_lock_irq(&file->lock);
189 }
190
191 if (file->fd < 0) {
192 spin_unlock_irq(&file->lock);
193 return -ENODEV;
194 }
195
196 if (file->is_async) {
197 event = list_entry(file->event_list.next,
198 struct ib_uverbs_async_event, list);
199 eventsz = sizeof (struct ib_uverbs_async_event_desc);
200 } else {
201 event = list_entry(file->event_list.next,
202 struct ib_uverbs_comp_event, list);
203 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
204 }
205
206 if (eventsz > count) {
207 ret = -EINVAL;
208 event = NULL;
209 } else
210 list_del(file->event_list.next);
211
212 spin_unlock_irq(&file->lock);
213
214 if (event) {
215 if (copy_to_user(buf, event, eventsz))
216 ret = -EFAULT;
217 else
218 ret = eventsz;
219 }
220
221 kfree(event);
222
223 return ret;
224}
225
226static unsigned int ib_uverbs_event_poll(struct file *filp,
227 struct poll_table_struct *wait)
228{
229 unsigned int pollflags = 0;
230 struct ib_uverbs_event_file *file = filp->private_data;
231
232 poll_wait(filp, &file->poll_wait, wait);
233
234 spin_lock_irq(&file->lock);
235 if (file->fd < 0)
236 pollflags = POLLERR;
237 else if (!list_empty(&file->event_list))
238 pollflags = POLLIN | POLLRDNORM;
239 spin_unlock_irq(&file->lock);
240
241 return pollflags;
242}
243
244static void ib_uverbs_event_release(struct ib_uverbs_event_file *file)
245{
246 struct list_head *entry, *tmp;
247
248 spin_lock_irq(&file->lock);
249 if (file->fd != -1) {
250 file->fd = -1;
251 list_for_each_safe(entry, tmp, &file->event_list)
252 if (file->is_async)
253 kfree(list_entry(entry, struct ib_uverbs_async_event, list));
254 else
255 kfree(list_entry(entry, struct ib_uverbs_comp_event, list));
256 }
257 spin_unlock_irq(&file->lock);
258}
259
260static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
261{
262 struct ib_uverbs_event_file *file = filp->private_data;
263
264 ib_uverbs_event_release(file);
265 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
266
267 return 0;
268}
269
270static struct file_operations uverbs_event_fops = {
271 /*
272 * No .owner field since we artificially create event files,
273 * so there is no increment to the module reference count in
274 * the open path. All event files come from a uverbs command
275 * file, which already takes a module reference, so this is OK.
276 */
277 .read = ib_uverbs_event_read,
278 .poll = ib_uverbs_event_poll,
279 .release = ib_uverbs_event_close
280};
281
282void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
283{
284 struct ib_uverbs_file *file = cq_context;
285 struct ib_uverbs_comp_event *entry;
286 unsigned long flags;
287
288 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
289 if (!entry)
290 return;
291
292 entry->desc.cq_handle = cq->uobject->user_handle;
293
294 spin_lock_irqsave(&file->comp_file[0].lock, flags);
295 list_add_tail(&entry->list, &file->comp_file[0].event_list);
296 spin_unlock_irqrestore(&file->comp_file[0].lock, flags);
297
298 wake_up_interruptible(&file->comp_file[0].poll_wait);
299}
300
301static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
302 __u64 element, __u64 event)
303{
304 struct ib_uverbs_async_event *entry;
305 unsigned long flags;
306
307 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
308 if (!entry)
309 return;
310
311 entry->desc.element = element;
312 entry->desc.event_type = event;
313
314 spin_lock_irqsave(&file->async_file.lock, flags);
315 list_add_tail(&entry->list, &file->async_file.event_list);
316 spin_unlock_irqrestore(&file->async_file.lock, flags);
317
318 wake_up_interruptible(&file->async_file.poll_wait);
319}
320
321void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
322{
323 ib_uverbs_async_handler(context_ptr,
324 event->element.cq->uobject->user_handle,
325 event->event);
326}
327
328void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
329{
330 ib_uverbs_async_handler(context_ptr,
331 event->element.qp->uobject->user_handle,
332 event->event);
333}
334
335static void ib_uverbs_event_handler(struct ib_event_handler *handler,
336 struct ib_event *event)
337{
338 struct ib_uverbs_file *file =
339 container_of(handler, struct ib_uverbs_file, event_handler);
340
341 ib_uverbs_async_handler(file, event->element.port_num, event->event);
342}
343
344static int ib_uverbs_event_init(struct ib_uverbs_event_file *file,
345 struct ib_uverbs_file *uverbs_file)
346{
347 struct file *filp;
348
349 spin_lock_init(&file->lock);
350 INIT_LIST_HEAD(&file->event_list);
351 init_waitqueue_head(&file->poll_wait);
352 file->uverbs_file = uverbs_file;
353
354 file->fd = get_unused_fd();
355 if (file->fd < 0)
356 return file->fd;
357
358 filp = get_empty_filp();
359 if (!filp) {
360 put_unused_fd(file->fd);
361 return -ENFILE;
362 }
363
364 filp->f_op = &uverbs_event_fops;
365 filp->f_vfsmnt = mntget(uverbs_event_mnt);
366 filp->f_dentry = dget(uverbs_event_mnt->mnt_root);
367 filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
368 filp->f_flags = O_RDONLY;
369 filp->f_mode = FMODE_READ;
370 filp->private_data = file;
371
372 fd_install(file->fd, filp);
373
374 return 0;
375}
376
377static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
378 size_t count, loff_t *pos)
379{
380 struct ib_uverbs_file *file = filp->private_data;
381 struct ib_uverbs_cmd_hdr hdr;
382
383 if (count < sizeof hdr)
384 return -EINVAL;
385
386 if (copy_from_user(&hdr, buf, sizeof hdr))
387 return -EFAULT;
388
389 if (hdr.in_words * 4 != count)
390 return -EINVAL;
391
392 if (hdr.command < 0 || hdr.command >= ARRAY_SIZE(uverbs_cmd_table))
393 return -EINVAL;
394
395 if (!file->ucontext &&
396 hdr.command != IB_USER_VERBS_CMD_QUERY_PARAMS &&
397 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
398 return -EINVAL;
399
400 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
401 hdr.in_words * 4, hdr.out_words * 4);
402}
403
404static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
405{
406 struct ib_uverbs_file *file = filp->private_data;
407
408 if (!file->ucontext)
409 return -ENODEV;
410 else
411 return file->device->ib_dev->mmap(file->ucontext, vma);
412}
413
414static int ib_uverbs_open(struct inode *inode, struct file *filp)
415{
416 struct ib_uverbs_device *dev =
417 container_of(inode->i_cdev, struct ib_uverbs_device, dev);
418 struct ib_uverbs_file *file;
419 int i = 0;
420 int ret;
421
422 if (!try_module_get(dev->ib_dev->owner))
423 return -ENODEV;
424
425 file = kmalloc(sizeof *file +
426 (dev->num_comp - 1) * sizeof (struct ib_uverbs_event_file),
427 GFP_KERNEL);
428 if (!file)
429 return -ENOMEM;
430
431 file->device = dev;
432 kref_init(&file->ref);
433
434 file->ucontext = NULL;
435
436 ret = ib_uverbs_event_init(&file->async_file, file);
437 if (ret)
438 goto err;
439
440 file->async_file.is_async = 1;
441
442 kref_get(&file->ref);
443
444 for (i = 0; i < dev->num_comp; ++i) {
445 ret = ib_uverbs_event_init(&file->comp_file[i], file);
446 if (ret)
447 goto err_async;
448 kref_get(&file->ref);
449 file->comp_file[i].is_async = 0;
450 }
451
452
453 filp->private_data = file;
454
455 INIT_IB_EVENT_HANDLER(&file->event_handler, dev->ib_dev,
456 ib_uverbs_event_handler);
457 if (ib_register_event_handler(&file->event_handler))
458 goto err_async;
459
460 return 0;
461
462err_async:
463 while (i--)
464 ib_uverbs_event_release(&file->comp_file[i]);
465
466 ib_uverbs_event_release(&file->async_file);
467
468err:
469 kref_put(&file->ref, ib_uverbs_release_file);
470
471 return ret;
472}
473
474static int ib_uverbs_close(struct inode *inode, struct file *filp)
475{
476 struct ib_uverbs_file *file = filp->private_data;
477 int i;
478
479 ib_unregister_event_handler(&file->event_handler);
480 ib_uverbs_event_release(&file->async_file);
481 ib_dealloc_ucontext(file->ucontext);
482
483 for (i = 0; i < file->device->num_comp; ++i)
484 ib_uverbs_event_release(&file->comp_file[i]);
485
486 kref_put(&file->ref, ib_uverbs_release_file);
487
488 return 0;
489}
490
491static struct file_operations uverbs_fops = {
492 .owner = THIS_MODULE,
493 .write = ib_uverbs_write,
494 .open = ib_uverbs_open,
495 .release = ib_uverbs_close
496};
497
498static struct file_operations uverbs_mmap_fops = {
499 .owner = THIS_MODULE,
500 .write = ib_uverbs_write,
501 .mmap = ib_uverbs_mmap,
502 .open = ib_uverbs_open,
503 .release = ib_uverbs_close
504};
505
506static struct ib_client uverbs_client = {
507 .name = "uverbs",
508 .add = ib_uverbs_add_one,
509 .remove = ib_uverbs_remove_one
510};
511
512static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
513{
514 struct ib_uverbs_device *dev =
515 container_of(class_dev, struct ib_uverbs_device, class_dev);
516
517 return sprintf(buf, "%s\n", dev->ib_dev->name);
518}
519static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
520
521static void ib_uverbs_release_class_dev(struct class_device *class_dev)
522{
523 struct ib_uverbs_device *dev =
524 container_of(class_dev, struct ib_uverbs_device, class_dev);
525
526 cdev_del(&dev->dev);
527 clear_bit(dev->devnum, dev_map);
528 kfree(dev);
529}
530
531static struct class uverbs_class = {
532 .name = "infiniband_verbs",
533 .release = ib_uverbs_release_class_dev
534};
535
536static ssize_t show_abi_version(struct class *class, char *buf)
537{
538 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
539}
540static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
541
542static void ib_uverbs_add_one(struct ib_device *device)
543{
544 struct ib_uverbs_device *uverbs_dev;
545
546 if (!device->alloc_ucontext)
547 return;
548
549 uverbs_dev = kmalloc(sizeof *uverbs_dev, GFP_KERNEL);
550 if (!uverbs_dev)
551 return;
552
553 memset(uverbs_dev, 0, sizeof *uverbs_dev);
554
555 spin_lock(&map_lock);
556 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
557 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
558 spin_unlock(&map_lock);
559 goto err;
560 }
561 set_bit(uverbs_dev->devnum, dev_map);
562 spin_unlock(&map_lock);
563
564 uverbs_dev->ib_dev = device;
565 uverbs_dev->num_comp = 1;
566
567 if (device->mmap)
568 cdev_init(&uverbs_dev->dev, &uverbs_mmap_fops);
569 else
570 cdev_init(&uverbs_dev->dev, &uverbs_fops);
571 uverbs_dev->dev.owner = THIS_MODULE;
572 kobject_set_name(&uverbs_dev->dev.kobj, "uverbs%d", uverbs_dev->devnum);
573 if (cdev_add(&uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
574 goto err;
575
576 uverbs_dev->class_dev.class = &uverbs_class;
577 uverbs_dev->class_dev.dev = device->dma_device;
578 uverbs_dev->class_dev.devt = uverbs_dev->dev.dev;
579 snprintf(uverbs_dev->class_dev.class_id, BUS_ID_SIZE, "uverbs%d", uverbs_dev->devnum);
580 if (class_device_register(&uverbs_dev->class_dev))
581 goto err_cdev;
582
583 if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_ibdev))
584 goto err_class;
585
586 ib_set_client_data(device, &uverbs_client, uverbs_dev);
587
588 return;
589
590err_class:
591 class_device_unregister(&uverbs_dev->class_dev);
592
593err_cdev:
594 cdev_del(&uverbs_dev->dev);
595 clear_bit(uverbs_dev->devnum, dev_map);
596
597err:
598 kfree(uverbs_dev);
599 return;
600}
601
602static void ib_uverbs_remove_one(struct ib_device *device)
603{
604 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
605
606 if (!uverbs_dev)
607 return;
608
609 class_device_unregister(&uverbs_dev->class_dev);
610}
611
612static struct super_block *uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
613 const char *dev_name, void *data)
614{
615 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
616 INFINIBANDEVENTFS_MAGIC);
617}
618
619static struct file_system_type uverbs_event_fs = {
620 /* No owner field so module can be unloaded */
621 .name = "infinibandeventfs",
622 .get_sb = uverbs_event_get_sb,
623 .kill_sb = kill_litter_super
624};
625
626static int __init ib_uverbs_init(void)
627{
628 int ret;
629
630 spin_lock_init(&map_lock);
631
632 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
633 "infiniband_verbs");
634 if (ret) {
635 printk(KERN_ERR "user_verbs: couldn't register device number\n");
636 goto out;
637 }
638
639 ret = class_register(&uverbs_class);
640 if (ret) {
641 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
642 goto out_chrdev;
643 }
644
645 ret = class_create_file(&uverbs_class, &class_attr_abi_version);
646 if (ret) {
647 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
648 goto out_class;
649 }
650
651 ret = register_filesystem(&uverbs_event_fs);
652 if (ret) {
653 printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
654 goto out_class;
655 }
656
657 uverbs_event_mnt = kern_mount(&uverbs_event_fs);
658 if (IS_ERR(uverbs_event_mnt)) {
659 ret = PTR_ERR(uverbs_event_mnt);
660 printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
661 goto out_fs;
662 }
663
664 ret = ib_register_client(&uverbs_client);
665 if (ret) {
666 printk(KERN_ERR "user_verbs: couldn't register client\n");
667 goto out_mnt;
668 }
669
670 return 0;
671
672out_mnt:
673 mntput(uverbs_event_mnt);
674
675out_fs:
676 unregister_filesystem(&uverbs_event_fs);
677
678out_class:
679 class_unregister(&uverbs_class);
680
681out_chrdev:
682 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
683
684out:
685 return ret;
686}
687
688static void __exit ib_uverbs_cleanup(void)
689{
690 ib_unregister_client(&uverbs_client);
691 mntput(uverbs_event_mnt);
692 unregister_filesystem(&uverbs_event_fs);
693 class_unregister(&uverbs_class);
694 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
695}
696
697module_init(ib_uverbs_init);
698module_exit(ib_uverbs_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 21:58:53 -0500