1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright (c) 2020, Mellanox Technologies inc. All rights reserved.
4 */
5
6#include <rdma/uverbs_std_types.h>
7#include "rdma_core.h"
8#include "uverbs.h"
9#include "core_priv.h"
10
11static int uverbs_free_qp(struct ib_uobject *uobject,
12 enum rdma_remove_reason why,
13 struct uverbs_attr_bundle *attrs)
14{
15 struct ib_qp *qp = uobject->object;
16 struct ib_uqp_object *uqp =
17 container_of(uobject, struct ib_uqp_object, uevent.uobject);
18 int ret;
19
20 /*
21 * If this is a user triggered destroy then do not allow destruction
22 * until the user cleans up all the mcast bindings. Unlike in other
23 * places we forcibly clean up the mcast attachments for !DESTROY
24 * because the mcast attaches are not ubojects and will not be
25 * destroyed by anything else during cleanup processing.
26 */
27 if (why == RDMA_REMOVE_DESTROY) {
28 if (!list_empty(head: &uqp->mcast_list))
29 return -EBUSY;
30 } else if (qp == qp->real_qp) {
31 ib_uverbs_detach_umcast(qp, uobj: uqp);
32 }
33
34 ret = ib_destroy_qp_user(qp, udata: &attrs->driver_udata);
35 if (ret)
36 return ret;
37
38 if (uqp->uxrcd)
39 atomic_dec(v: &uqp->uxrcd->refcnt);
40
41 ib_uverbs_release_uevent(uobj: &uqp->uevent);
42 return 0;
43}
44
45static int check_creation_flags(enum ib_qp_type qp_type,
46 u32 create_flags)
47{
48 create_flags &= ~IB_UVERBS_QP_CREATE_SQ_SIG_ALL;
49
50 if (!create_flags || qp_type == IB_QPT_DRIVER)
51 return 0;
52
53 if (qp_type != IB_QPT_RAW_PACKET && qp_type != IB_QPT_UD)
54 return -EINVAL;
55
56 if ((create_flags & IB_UVERBS_QP_CREATE_SCATTER_FCS ||
57 create_flags & IB_UVERBS_QP_CREATE_CVLAN_STRIPPING) &&
58 qp_type != IB_QPT_RAW_PACKET)
59 return -EINVAL;
60
61 return 0;
62}
63
64static void set_caps(struct ib_qp_init_attr *attr,
65 struct ib_uverbs_qp_cap *cap, bool req)
66{
67 if (req) {
68 attr->cap.max_send_wr = cap->max_send_wr;
69 attr->cap.max_recv_wr = cap->max_recv_wr;
70 attr->cap.max_send_sge = cap->max_send_sge;
71 attr->cap.max_recv_sge = cap->max_recv_sge;
72 attr->cap.max_inline_data = cap->max_inline_data;
73 } else {
74 cap->max_send_wr = attr->cap.max_send_wr;
75 cap->max_recv_wr = attr->cap.max_recv_wr;
76 cap->max_send_sge = attr->cap.max_send_sge;
77 cap->max_recv_sge = attr->cap.max_recv_sge;
78 cap->max_inline_data = attr->cap.max_inline_data;
79 }
80}
81
82static int UVERBS_HANDLER(UVERBS_METHOD_QP_CREATE)(
83 struct uverbs_attr_bundle *attrs)
84{
85 struct ib_uqp_object *obj = container_of(
86 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_QP_HANDLE),
87 typeof(*obj), uevent.uobject);
88 struct ib_qp_init_attr attr = {};
89 struct ib_uverbs_qp_cap cap = {};
90 struct ib_rwq_ind_table *rwq_ind_tbl = NULL;
91 struct ib_qp *qp;
92 struct ib_pd *pd = NULL;
93 struct ib_srq *srq = NULL;
94 struct ib_cq *recv_cq = NULL;
95 struct ib_cq *send_cq = NULL;
96 struct ib_xrcd *xrcd = NULL;
97 struct ib_uobject *xrcd_uobj = NULL;
98 struct ib_device *device;
99 u64 user_handle;
100 int ret;
101
102 ret = uverbs_copy_from_or_zero(&cap, attrs,
103 UVERBS_ATTR_CREATE_QP_CAP);
104 if (!ret)
105 ret = uverbs_copy_from(&user_handle, attrs,
106 UVERBS_ATTR_CREATE_QP_USER_HANDLE);
107 if (!ret)
108 ret = uverbs_get_const(&attr.qp_type, attrs,
109 UVERBS_ATTR_CREATE_QP_TYPE);
110 if (ret)
111 return ret;
112
113 switch (attr.qp_type) {
114 case IB_QPT_XRC_TGT:
115 if (uverbs_attr_is_valid(attrs_bundle: attrs,
116 idx: UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE) ||
117 uverbs_attr_is_valid(attrs_bundle: attrs,
118 idx: UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE) ||
119 uverbs_attr_is_valid(attrs_bundle: attrs,
120 idx: UVERBS_ATTR_CREATE_QP_PD_HANDLE) ||
121 uverbs_attr_is_valid(attrs_bundle: attrs,
122 idx: UVERBS_ATTR_CREATE_QP_IND_TABLE_HANDLE))
123 return -EINVAL;
124
125 xrcd_uobj = uverbs_attr_get_uobject(attrs_bundle: attrs,
126 idx: UVERBS_ATTR_CREATE_QP_XRCD_HANDLE);
127 if (IS_ERR(ptr: xrcd_uobj))
128 return PTR_ERR(ptr: xrcd_uobj);
129
130 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
131 if (!xrcd)
132 return -EINVAL;
133 device = xrcd->device;
134 break;
135 case IB_UVERBS_QPT_RAW_PACKET:
136 if (!rdma_uattrs_has_raw_cap(attrs))
137 return -EPERM;
138 fallthrough;
139 case IB_UVERBS_QPT_RC:
140 case IB_UVERBS_QPT_UC:
141 case IB_UVERBS_QPT_UD:
142 case IB_UVERBS_QPT_XRC_INI:
143 case IB_UVERBS_QPT_DRIVER:
144 if (uverbs_attr_is_valid(attrs_bundle: attrs,
145 idx: UVERBS_ATTR_CREATE_QP_XRCD_HANDLE) ||
146 (uverbs_attr_is_valid(attrs_bundle: attrs,
147 idx: UVERBS_ATTR_CREATE_QP_SRQ_HANDLE) &&
148 attr.qp_type == IB_QPT_XRC_INI))
149 return -EINVAL;
150
151 pd = uverbs_attr_get_obj(attrs_bundle: attrs,
152 idx: UVERBS_ATTR_CREATE_QP_PD_HANDLE);
153 if (IS_ERR(ptr: pd))
154 return PTR_ERR(ptr: pd);
155
156 rwq_ind_tbl = uverbs_attr_get_obj(attrs_bundle: attrs,
157 idx: UVERBS_ATTR_CREATE_QP_IND_TABLE_HANDLE);
158 if (!IS_ERR(ptr: rwq_ind_tbl)) {
159 if (cap.max_recv_wr || cap.max_recv_sge ||
160 uverbs_attr_is_valid(attrs_bundle: attrs,
161 idx: UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE) ||
162 uverbs_attr_is_valid(attrs_bundle: attrs,
163 idx: UVERBS_ATTR_CREATE_QP_SRQ_HANDLE))
164 return -EINVAL;
165
166 /* send_cq is optional */
167 if (cap.max_send_wr) {
168 send_cq = uverbs_attr_get_obj(attrs_bundle: attrs,
169 idx: UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE);
170 if (IS_ERR(ptr: send_cq))
171 return PTR_ERR(ptr: send_cq);
172 }
173 attr.rwq_ind_tbl = rwq_ind_tbl;
174 } else {
175 send_cq = uverbs_attr_get_obj(attrs_bundle: attrs,
176 idx: UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE);
177 if (IS_ERR(ptr: send_cq))
178 return PTR_ERR(ptr: send_cq);
179
180 if (attr.qp_type != IB_QPT_XRC_INI) {
181 recv_cq = uverbs_attr_get_obj(attrs_bundle: attrs,
182 idx: UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE);
183 if (IS_ERR(ptr: recv_cq))
184 return PTR_ERR(ptr: recv_cq);
185 }
186 }
187
188 device = pd->device;
189 break;
190 default:
191 return -EINVAL;
192 }
193
194 ret = uverbs_get_flags32(to: &attr.create_flags, attrs_bundle: attrs,
195 idx: UVERBS_ATTR_CREATE_QP_FLAGS,
196 allowed_bits: IB_UVERBS_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
197 IB_UVERBS_QP_CREATE_SCATTER_FCS |
198 IB_UVERBS_QP_CREATE_CVLAN_STRIPPING |
199 IB_UVERBS_QP_CREATE_PCI_WRITE_END_PADDING |
200 IB_UVERBS_QP_CREATE_SQ_SIG_ALL);
201 if (ret)
202 return ret;
203
204 ret = check_creation_flags(qp_type: attr.qp_type, create_flags: attr.create_flags);
205 if (ret)
206 return ret;
207
208 if (uverbs_attr_is_valid(attrs_bundle: attrs,
209 idx: UVERBS_ATTR_CREATE_QP_SOURCE_QPN)) {
210 ret = uverbs_copy_from(&attr.source_qpn, attrs,
211 UVERBS_ATTR_CREATE_QP_SOURCE_QPN);
212 if (ret)
213 return ret;
214 attr.create_flags |= IB_QP_CREATE_SOURCE_QPN;
215 }
216
217 srq = uverbs_attr_get_obj(attrs_bundle: attrs,
218 idx: UVERBS_ATTR_CREATE_QP_SRQ_HANDLE);
219 if (!IS_ERR(ptr: srq)) {
220 if ((srq->srq_type == IB_SRQT_XRC &&
221 attr.qp_type != IB_QPT_XRC_TGT) ||
222 (srq->srq_type != IB_SRQT_XRC &&
223 attr.qp_type == IB_QPT_XRC_TGT))
224 return -EINVAL;
225 attr.srq = srq;
226 }
227
228 obj->uevent.event_file = ib_uverbs_get_async_event(attrs,
229 id: UVERBS_ATTR_CREATE_QP_EVENT_FD);
230 INIT_LIST_HEAD(list: &obj->uevent.event_list);
231 INIT_LIST_HEAD(list: &obj->mcast_list);
232 obj->uevent.uobject.user_handle = user_handle;
233 attr.event_handler = ib_uverbs_qp_event_handler;
234 attr.send_cq = send_cq;
235 attr.recv_cq = recv_cq;
236 attr.xrcd = xrcd;
237 if (attr.create_flags & IB_UVERBS_QP_CREATE_SQ_SIG_ALL) {
238 /* This creation bit is uverbs one, need to mask before
239 * calling drivers. It was added to prevent an extra user attr
240 * only for that when using ioctl.
241 */
242 attr.create_flags &= ~IB_UVERBS_QP_CREATE_SQ_SIG_ALL;
243 attr.sq_sig_type = IB_SIGNAL_ALL_WR;
244 } else {
245 attr.sq_sig_type = IB_SIGNAL_REQ_WR;
246 }
247
248 set_caps(attr: &attr, cap: &cap, req: true);
249 mutex_init(&obj->mcast_lock);
250
251 qp = ib_create_qp_user(dev: device, pd, attr: &attr, udata: &attrs->driver_udata, uobj: obj,
252 KBUILD_MODNAME);
253 if (IS_ERR(ptr: qp)) {
254 ret = PTR_ERR(ptr: qp);
255 goto err_put;
256 }
257 ib_qp_usecnt_inc(qp);
258
259 if (attr.qp_type == IB_QPT_XRC_TGT) {
260 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
261 uobject);
262 atomic_inc(v: &obj->uxrcd->refcnt);
263 }
264
265 obj->uevent.uobject.object = qp;
266 uverbs_finalize_uobj_create(attrs_bundle: attrs, idx: UVERBS_ATTR_CREATE_QP_HANDLE);
267
268 set_caps(attr: &attr, cap: &cap, req: false);
269 ret = uverbs_copy_to_struct_or_zero(bundle: attrs,
270 idx: UVERBS_ATTR_CREATE_QP_RESP_CAP, from: &cap,
271 size: sizeof(cap));
272 if (ret)
273 return ret;
274
275 ret = uverbs_copy_to(attrs_bundle: attrs, idx: UVERBS_ATTR_CREATE_QP_RESP_QP_NUM,
276 from: &qp->qp_num,
277 size: sizeof(qp->qp_num));
278
279 return ret;
280err_put:
281 if (obj->uevent.event_file)
282 uverbs_uobject_put(uobject: &obj->uevent.event_file->uobj);
283 return ret;
284};
285
286DECLARE_UVERBS_NAMED_METHOD(
287 UVERBS_METHOD_QP_CREATE,
288 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_HANDLE,
289 UVERBS_OBJECT_QP,
290 UVERBS_ACCESS_NEW,
291 UA_MANDATORY),
292 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_XRCD_HANDLE,
293 UVERBS_OBJECT_XRCD,
294 UVERBS_ACCESS_READ,
295 UA_OPTIONAL),
296 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_PD_HANDLE,
297 UVERBS_OBJECT_PD,
298 UVERBS_ACCESS_READ,
299 UA_OPTIONAL),
300 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_SRQ_HANDLE,
301 UVERBS_OBJECT_SRQ,
302 UVERBS_ACCESS_READ,
303 UA_OPTIONAL),
304 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE,
305 UVERBS_OBJECT_CQ,
306 UVERBS_ACCESS_READ,
307 UA_OPTIONAL),
308 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE,
309 UVERBS_OBJECT_CQ,
310 UVERBS_ACCESS_READ,
311 UA_OPTIONAL),
312 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_QP_IND_TABLE_HANDLE,
313 UVERBS_OBJECT_RWQ_IND_TBL,
314 UVERBS_ACCESS_READ,
315 UA_OPTIONAL),
316 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_QP_USER_HANDLE,
317 UVERBS_ATTR_TYPE(u64),
318 UA_MANDATORY),
319 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_QP_CAP,
320 UVERBS_ATTR_STRUCT(struct ib_uverbs_qp_cap,
321 max_inline_data),
322 UA_MANDATORY),
323 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_CREATE_QP_TYPE,
324 enum ib_uverbs_qp_type,
325 UA_MANDATORY),
326 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_QP_FLAGS,
327 enum ib_uverbs_qp_create_flags,
328 UA_OPTIONAL),
329 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_QP_SOURCE_QPN,
330 UVERBS_ATTR_TYPE(u32),
331 UA_OPTIONAL),
332 UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_QP_EVENT_FD,
333 UVERBS_OBJECT_ASYNC_EVENT,
334 UVERBS_ACCESS_READ,
335 UA_OPTIONAL),
336 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_QP_RESP_CAP,
337 UVERBS_ATTR_STRUCT(struct ib_uverbs_qp_cap,
338 max_inline_data),
339 UA_MANDATORY),
340 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_QP_RESP_QP_NUM,
341 UVERBS_ATTR_TYPE(u32),
342 UA_MANDATORY),
343 UVERBS_ATTR_UHW());
344
345static int UVERBS_HANDLER(UVERBS_METHOD_QP_DESTROY)(
346 struct uverbs_attr_bundle *attrs)
347{
348 struct ib_uobject *uobj =
349 uverbs_attr_get_uobject(attrs_bundle: attrs, idx: UVERBS_ATTR_DESTROY_QP_HANDLE);
350 struct ib_uqp_object *obj =
351 container_of(uobj, struct ib_uqp_object, uevent.uobject);
352 struct ib_uverbs_destroy_qp_resp resp = {
353 .events_reported = obj->uevent.events_reported
354 };
355
356 return uverbs_copy_to(attrs_bundle: attrs, idx: UVERBS_ATTR_DESTROY_QP_RESP, from: &resp,
357 size: sizeof(resp));
358}
359
360DECLARE_UVERBS_NAMED_METHOD(
361 UVERBS_METHOD_QP_DESTROY,
362 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_QP_HANDLE,
363 UVERBS_OBJECT_QP,
364 UVERBS_ACCESS_DESTROY,
365 UA_MANDATORY),
366 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_QP_RESP,
367 UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_qp_resp),
368 UA_MANDATORY));
369
370DECLARE_UVERBS_NAMED_OBJECT(
371 UVERBS_OBJECT_QP,
372 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), uverbs_free_qp),
373 &UVERBS_METHOD(UVERBS_METHOD_QP_CREATE),
374 &UVERBS_METHOD(UVERBS_METHOD_QP_DESTROY));
375
376const struct uapi_definition uverbs_def_obj_qp[] = {
377 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_QP,
378 UAPI_DEF_OBJ_NEEDS_FN(destroy_qp)),
379 {}
380};
381

source code of linux/drivers/infiniband/core/uverbs_std_types_qp.c