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29c8d9eb AR |
1 | /* |
2 | * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of EITHER the GNU General Public License | |
6 | * version 2 as published by the Free Software Foundation or the BSD | |
7 | * 2-Clause License. This program is distributed in the hope that it | |
8 | * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED | |
9 | * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. | |
10 | * See the GNU General Public License version 2 for more details at | |
11 | * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program available in the file COPYING in the main | |
15 | * directory of this source tree. | |
16 | * | |
17 | * The BSD 2-Clause License | |
18 | * | |
19 | * Redistribution and use in source and binary forms, with or | |
20 | * without modification, are permitted provided that the following | |
21 | * conditions are met: | |
22 | * | |
23 | * - Redistributions of source code must retain the above | |
24 | * copyright notice, this list of conditions and the following | |
25 | * disclaimer. | |
26 | * | |
27 | * - Redistributions in binary form must reproduce the above | |
28 | * copyright notice, this list of conditions and the following | |
29 | * disclaimer in the documentation and/or other materials | |
30 | * provided with the distribution. | |
31 | * | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
35 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
36 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
37 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
38 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
39 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
41 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
42 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
43 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
44 | */ | |
45 | ||
46 | #include <asm/page.h> | |
47 | #include <linux/inet.h> | |
48 | #include <linux/io.h> | |
49 | #include <rdma/ib_addr.h> | |
50 | #include <rdma/ib_smi.h> | |
51 | #include <rdma/ib_user_verbs.h> | |
52 | #include <rdma/vmw_pvrdma-abi.h> | |
53 | ||
54 | #include "pvrdma.h" | |
55 | ||
56 | /** | |
57 | * pvrdma_query_device - query device | |
58 | * @ibdev: the device to query | |
59 | * @props: the device properties | |
60 | * @uhw: user data | |
61 | * | |
62 | * @return: 0 on success, otherwise negative errno | |
63 | */ | |
64 | int pvrdma_query_device(struct ib_device *ibdev, | |
65 | struct ib_device_attr *props, | |
66 | struct ib_udata *uhw) | |
67 | { | |
68 | struct pvrdma_dev *dev = to_vdev(ibdev); | |
69 | ||
70 | if (uhw->inlen || uhw->outlen) | |
71 | return -EINVAL; | |
72 | ||
73 | memset(props, 0, sizeof(*props)); | |
74 | ||
75 | props->fw_ver = dev->dsr->caps.fw_ver; | |
76 | props->sys_image_guid = dev->dsr->caps.sys_image_guid; | |
77 | props->max_mr_size = dev->dsr->caps.max_mr_size; | |
78 | props->page_size_cap = dev->dsr->caps.page_size_cap; | |
79 | props->vendor_id = dev->dsr->caps.vendor_id; | |
80 | props->vendor_part_id = dev->pdev->device; | |
81 | props->hw_ver = dev->dsr->caps.hw_ver; | |
82 | props->max_qp = dev->dsr->caps.max_qp; | |
83 | props->max_qp_wr = dev->dsr->caps.max_qp_wr; | |
84 | props->device_cap_flags = dev->dsr->caps.device_cap_flags; | |
85 | props->max_sge = dev->dsr->caps.max_sge; | |
a31a2a3b AR |
86 | props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge, |
87 | dev->dsr->caps.max_sge_rd); | |
8b10ba78 BT |
88 | props->max_srq = dev->dsr->caps.max_srq; |
89 | props->max_srq_wr = dev->dsr->caps.max_srq_wr; | |
90 | props->max_srq_sge = dev->dsr->caps.max_srq_sge; | |
29c8d9eb AR |
91 | props->max_cq = dev->dsr->caps.max_cq; |
92 | props->max_cqe = dev->dsr->caps.max_cqe; | |
93 | props->max_mr = dev->dsr->caps.max_mr; | |
94 | props->max_pd = dev->dsr->caps.max_pd; | |
95 | props->max_qp_rd_atom = dev->dsr->caps.max_qp_rd_atom; | |
96 | props->max_qp_init_rd_atom = dev->dsr->caps.max_qp_init_rd_atom; | |
97 | props->atomic_cap = | |
98 | dev->dsr->caps.atomic_ops & | |
99 | (PVRDMA_ATOMIC_OP_COMP_SWAP | PVRDMA_ATOMIC_OP_FETCH_ADD) ? | |
100 | IB_ATOMIC_HCA : IB_ATOMIC_NONE; | |
101 | props->masked_atomic_cap = props->atomic_cap; | |
102 | props->max_ah = dev->dsr->caps.max_ah; | |
103 | props->max_pkeys = dev->dsr->caps.max_pkeys; | |
104 | props->local_ca_ack_delay = dev->dsr->caps.local_ca_ack_delay; | |
105 | if ((dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_LOCAL_INV) && | |
106 | (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_REMOTE_INV) && | |
107 | (dev->dsr->caps.bmme_flags & PVRDMA_BMME_FLAG_FAST_REG_WR)) { | |
108 | props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS; | |
a31a2a3b AR |
109 | props->max_fast_reg_page_list_len = PVRDMA_GET_CAP(dev, |
110 | PVRDMA_MAX_FAST_REG_PAGES, | |
111 | dev->dsr->caps.max_fast_reg_page_list_len); | |
29c8d9eb AR |
112 | } |
113 | ||
a31a2a3b AR |
114 | props->device_cap_flags |= IB_DEVICE_PORT_ACTIVE_EVENT | |
115 | IB_DEVICE_RC_RNR_NAK_GEN; | |
116 | ||
29c8d9eb AR |
117 | return 0; |
118 | } | |
119 | ||
120 | /** | |
121 | * pvrdma_query_port - query device port attributes | |
122 | * @ibdev: the device to query | |
123 | * @port: the port number | |
124 | * @props: the device properties | |
125 | * | |
126 | * @return: 0 on success, otherwise negative errno | |
127 | */ | |
128 | int pvrdma_query_port(struct ib_device *ibdev, u8 port, | |
129 | struct ib_port_attr *props) | |
130 | { | |
131 | struct pvrdma_dev *dev = to_vdev(ibdev); | |
132 | union pvrdma_cmd_req req; | |
133 | union pvrdma_cmd_resp rsp; | |
134 | struct pvrdma_cmd_query_port *cmd = &req.query_port; | |
135 | struct pvrdma_cmd_query_port_resp *resp = &rsp.query_port_resp; | |
136 | int err; | |
137 | ||
138 | memset(cmd, 0, sizeof(*cmd)); | |
139 | cmd->hdr.cmd = PVRDMA_CMD_QUERY_PORT; | |
140 | cmd->port_num = port; | |
141 | ||
142 | err = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_PORT_RESP); | |
143 | if (err < 0) { | |
144 | dev_warn(&dev->pdev->dev, | |
145 | "could not query port, error: %d\n", err); | |
146 | return err; | |
147 | } | |
148 | ||
c4550c63 | 149 | /* props being zeroed by the caller, avoid zeroing it here */ |
29c8d9eb AR |
150 | |
151 | props->state = pvrdma_port_state_to_ib(resp->attrs.state); | |
152 | props->max_mtu = pvrdma_mtu_to_ib(resp->attrs.max_mtu); | |
153 | props->active_mtu = pvrdma_mtu_to_ib(resp->attrs.active_mtu); | |
154 | props->gid_tbl_len = resp->attrs.gid_tbl_len; | |
155 | props->port_cap_flags = | |
156 | pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags); | |
a31a2a3b | 157 | props->port_cap_flags |= IB_PORT_CM_SUP | IB_PORT_IP_BASED_GIDS; |
29c8d9eb AR |
158 | props->max_msg_sz = resp->attrs.max_msg_sz; |
159 | props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr; | |
160 | props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr; | |
161 | props->pkey_tbl_len = resp->attrs.pkey_tbl_len; | |
162 | props->lid = resp->attrs.lid; | |
163 | props->sm_lid = resp->attrs.sm_lid; | |
164 | props->lmc = resp->attrs.lmc; | |
165 | props->max_vl_num = resp->attrs.max_vl_num; | |
166 | props->sm_sl = resp->attrs.sm_sl; | |
167 | props->subnet_timeout = resp->attrs.subnet_timeout; | |
168 | props->init_type_reply = resp->attrs.init_type_reply; | |
169 | props->active_width = pvrdma_port_width_to_ib(resp->attrs.active_width); | |
170 | props->active_speed = pvrdma_port_speed_to_ib(resp->attrs.active_speed); | |
171 | props->phys_state = resp->attrs.phys_state; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | /** | |
177 | * pvrdma_query_gid - query device gid | |
178 | * @ibdev: the device to query | |
179 | * @port: the port number | |
180 | * @index: the index | |
181 | * @gid: the device gid value | |
182 | * | |
183 | * @return: 0 on success, otherwise negative errno | |
184 | */ | |
185 | int pvrdma_query_gid(struct ib_device *ibdev, u8 port, int index, | |
186 | union ib_gid *gid) | |
187 | { | |
188 | struct pvrdma_dev *dev = to_vdev(ibdev); | |
189 | ||
190 | if (index >= dev->dsr->caps.gid_tbl_len) | |
191 | return -EINVAL; | |
192 | ||
193 | memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid)); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | /** | |
199 | * pvrdma_query_pkey - query device port's P_Key table | |
200 | * @ibdev: the device to query | |
201 | * @port: the port number | |
202 | * @index: the index | |
203 | * @pkey: the device P_Key value | |
204 | * | |
205 | * @return: 0 on success, otherwise negative errno | |
206 | */ | |
207 | int pvrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, | |
208 | u16 *pkey) | |
209 | { | |
210 | int err = 0; | |
211 | union pvrdma_cmd_req req; | |
212 | union pvrdma_cmd_resp rsp; | |
213 | struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey; | |
214 | ||
215 | memset(cmd, 0, sizeof(*cmd)); | |
216 | cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY; | |
217 | cmd->port_num = port; | |
218 | cmd->index = index; | |
219 | ||
220 | err = pvrdma_cmd_post(to_vdev(ibdev), &req, &rsp, | |
221 | PVRDMA_CMD_QUERY_PKEY_RESP); | |
222 | if (err < 0) { | |
223 | dev_warn(&to_vdev(ibdev)->pdev->dev, | |
224 | "could not query pkey, error: %d\n", err); | |
225 | return err; | |
226 | } | |
227 | ||
228 | *pkey = rsp.query_pkey_resp.pkey; | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev, | |
234 | u8 port) | |
235 | { | |
236 | return IB_LINK_LAYER_ETHERNET; | |
237 | } | |
238 | ||
239 | int pvrdma_modify_device(struct ib_device *ibdev, int mask, | |
240 | struct ib_device_modify *props) | |
241 | { | |
242 | unsigned long flags; | |
243 | ||
244 | if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | | |
245 | IB_DEVICE_MODIFY_NODE_DESC)) { | |
246 | dev_warn(&to_vdev(ibdev)->pdev->dev, | |
247 | "unsupported device modify mask %#x\n", mask); | |
248 | return -EOPNOTSUPP; | |
249 | } | |
250 | ||
251 | if (mask & IB_DEVICE_MODIFY_NODE_DESC) { | |
252 | spin_lock_irqsave(&to_vdev(ibdev)->desc_lock, flags); | |
253 | memcpy(ibdev->node_desc, props->node_desc, 64); | |
254 | spin_unlock_irqrestore(&to_vdev(ibdev)->desc_lock, flags); | |
255 | } | |
256 | ||
257 | if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) { | |
258 | mutex_lock(&to_vdev(ibdev)->port_mutex); | |
259 | to_vdev(ibdev)->sys_image_guid = | |
260 | cpu_to_be64(props->sys_image_guid); | |
261 | mutex_unlock(&to_vdev(ibdev)->port_mutex); | |
262 | } | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | /** | |
268 | * pvrdma_modify_port - modify device port attributes | |
269 | * @ibdev: the device to modify | |
270 | * @port: the port number | |
271 | * @mask: attributes to modify | |
272 | * @props: the device properties | |
273 | * | |
274 | * @return: 0 on success, otherwise negative errno | |
275 | */ | |
276 | int pvrdma_modify_port(struct ib_device *ibdev, u8 port, int mask, | |
277 | struct ib_port_modify *props) | |
278 | { | |
279 | struct ib_port_attr attr; | |
280 | struct pvrdma_dev *vdev = to_vdev(ibdev); | |
281 | int ret; | |
282 | ||
283 | if (mask & ~IB_PORT_SHUTDOWN) { | |
284 | dev_warn(&vdev->pdev->dev, | |
285 | "unsupported port modify mask %#x\n", mask); | |
286 | return -EOPNOTSUPP; | |
287 | } | |
288 | ||
289 | mutex_lock(&vdev->port_mutex); | |
c4550c63 | 290 | ret = ib_query_port(ibdev, port, &attr); |
29c8d9eb AR |
291 | if (ret) |
292 | goto out; | |
293 | ||
294 | vdev->port_cap_mask |= props->set_port_cap_mask; | |
295 | vdev->port_cap_mask &= ~props->clr_port_cap_mask; | |
296 | ||
297 | if (mask & IB_PORT_SHUTDOWN) | |
298 | vdev->ib_active = false; | |
299 | ||
300 | out: | |
301 | mutex_unlock(&vdev->port_mutex); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | /** | |
306 | * pvrdma_alloc_ucontext - allocate ucontext | |
307 | * @ibdev: the IB device | |
308 | * @udata: user data | |
309 | * | |
310 | * @return: the ib_ucontext pointer on success, otherwise errno. | |
311 | */ | |
312 | struct ib_ucontext *pvrdma_alloc_ucontext(struct ib_device *ibdev, | |
313 | struct ib_udata *udata) | |
314 | { | |
315 | struct pvrdma_dev *vdev = to_vdev(ibdev); | |
316 | struct pvrdma_ucontext *context; | |
317 | union pvrdma_cmd_req req; | |
318 | union pvrdma_cmd_resp rsp; | |
319 | struct pvrdma_cmd_create_uc *cmd = &req.create_uc; | |
320 | struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp; | |
7d211c81 | 321 | struct pvrdma_alloc_ucontext_resp uresp = {0}; |
29c8d9eb AR |
322 | int ret; |
323 | void *ptr; | |
324 | ||
325 | if (!vdev->ib_active) | |
326 | return ERR_PTR(-EAGAIN); | |
327 | ||
328 | context = kmalloc(sizeof(*context), GFP_KERNEL); | |
329 | if (!context) | |
330 | return ERR_PTR(-ENOMEM); | |
331 | ||
332 | context->dev = vdev; | |
333 | ret = pvrdma_uar_alloc(vdev, &context->uar); | |
334 | if (ret) { | |
335 | kfree(context); | |
336 | return ERR_PTR(-ENOMEM); | |
337 | } | |
338 | ||
339 | /* get ctx_handle from host */ | |
340 | memset(cmd, 0, sizeof(*cmd)); | |
341 | cmd->pfn = context->uar.pfn; | |
342 | cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC; | |
343 | ret = pvrdma_cmd_post(vdev, &req, &rsp, PVRDMA_CMD_CREATE_UC_RESP); | |
344 | if (ret < 0) { | |
345 | dev_warn(&vdev->pdev->dev, | |
346 | "could not create ucontext, error: %d\n", ret); | |
347 | ptr = ERR_PTR(ret); | |
348 | goto err; | |
349 | } | |
350 | ||
351 | context->ctx_handle = resp->ctx_handle; | |
352 | ||
353 | /* copy back to user */ | |
354 | uresp.qp_tab_size = vdev->dsr->caps.max_qp; | |
355 | ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); | |
356 | if (ret) { | |
357 | pvrdma_uar_free(vdev, &context->uar); | |
358 | context->ibucontext.device = ibdev; | |
359 | pvrdma_dealloc_ucontext(&context->ibucontext); | |
360 | return ERR_PTR(-EFAULT); | |
361 | } | |
362 | ||
363 | return &context->ibucontext; | |
364 | ||
365 | err: | |
366 | pvrdma_uar_free(vdev, &context->uar); | |
367 | kfree(context); | |
368 | return ptr; | |
369 | } | |
370 | ||
371 | /** | |
372 | * pvrdma_dealloc_ucontext - deallocate ucontext | |
373 | * @ibcontext: the ucontext | |
374 | * | |
375 | * @return: 0 on success, otherwise errno. | |
376 | */ | |
377 | int pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext) | |
378 | { | |
379 | struct pvrdma_ucontext *context = to_vucontext(ibcontext); | |
380 | union pvrdma_cmd_req req; | |
381 | struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc; | |
382 | int ret; | |
383 | ||
384 | memset(cmd, 0, sizeof(*cmd)); | |
385 | cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC; | |
386 | cmd->ctx_handle = context->ctx_handle; | |
387 | ||
388 | ret = pvrdma_cmd_post(context->dev, &req, NULL, 0); | |
389 | if (ret < 0) | |
390 | dev_warn(&context->dev->pdev->dev, | |
391 | "destroy ucontext failed, error: %d\n", ret); | |
392 | ||
393 | /* Free the UAR even if the device command failed */ | |
394 | pvrdma_uar_free(to_vdev(ibcontext->device), &context->uar); | |
395 | kfree(context); | |
396 | ||
397 | return ret; | |
398 | } | |
399 | ||
400 | /** | |
401 | * pvrdma_mmap - create mmap region | |
402 | * @ibcontext: the user context | |
403 | * @vma: the VMA | |
404 | * | |
405 | * @return: 0 on success, otherwise errno. | |
406 | */ | |
407 | int pvrdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma) | |
408 | { | |
409 | struct pvrdma_ucontext *context = to_vucontext(ibcontext); | |
410 | unsigned long start = vma->vm_start; | |
411 | unsigned long size = vma->vm_end - vma->vm_start; | |
412 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
413 | ||
414 | dev_dbg(&context->dev->pdev->dev, "create mmap region\n"); | |
415 | ||
416 | if ((size != PAGE_SIZE) || (offset & ~PAGE_MASK)) { | |
417 | dev_warn(&context->dev->pdev->dev, | |
418 | "invalid params for mmap region\n"); | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | /* Map UAR to kernel space, VM_LOCKED? */ | |
423 | vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
424 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
425 | if (io_remap_pfn_range(vma, start, context->uar.pfn, size, | |
426 | vma->vm_page_prot)) | |
427 | return -EAGAIN; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
432 | /** | |
433 | * pvrdma_alloc_pd - allocate protection domain | |
434 | * @ibdev: the IB device | |
435 | * @context: user context | |
436 | * @udata: user data | |
437 | * | |
438 | * @return: the ib_pd protection domain pointer on success, otherwise errno. | |
439 | */ | |
440 | struct ib_pd *pvrdma_alloc_pd(struct ib_device *ibdev, | |
441 | struct ib_ucontext *context, | |
442 | struct ib_udata *udata) | |
443 | { | |
444 | struct pvrdma_pd *pd; | |
445 | struct pvrdma_dev *dev = to_vdev(ibdev); | |
446 | union pvrdma_cmd_req req; | |
447 | union pvrdma_cmd_resp rsp; | |
448 | struct pvrdma_cmd_create_pd *cmd = &req.create_pd; | |
449 | struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp; | |
450 | int ret; | |
451 | void *ptr; | |
452 | ||
453 | /* Check allowed max pds */ | |
454 | if (!atomic_add_unless(&dev->num_pds, 1, dev->dsr->caps.max_pd)) | |
455 | return ERR_PTR(-ENOMEM); | |
456 | ||
457 | pd = kmalloc(sizeof(*pd), GFP_KERNEL); | |
458 | if (!pd) { | |
459 | ptr = ERR_PTR(-ENOMEM); | |
460 | goto err; | |
461 | } | |
462 | ||
463 | memset(cmd, 0, sizeof(*cmd)); | |
464 | cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD; | |
465 | cmd->ctx_handle = (context) ? to_vucontext(context)->ctx_handle : 0; | |
466 | ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_PD_RESP); | |
467 | if (ret < 0) { | |
468 | dev_warn(&dev->pdev->dev, | |
469 | "failed to allocate protection domain, error: %d\n", | |
470 | ret); | |
471 | ptr = ERR_PTR(ret); | |
472 | goto freepd; | |
473 | } | |
474 | ||
475 | pd->privileged = !context; | |
476 | pd->pd_handle = resp->pd_handle; | |
477 | pd->pdn = resp->pd_handle; | |
478 | ||
479 | if (context) { | |
480 | if (ib_copy_to_udata(udata, &pd->pdn, sizeof(__u32))) { | |
481 | dev_warn(&dev->pdev->dev, | |
482 | "failed to copy back protection domain\n"); | |
483 | pvrdma_dealloc_pd(&pd->ibpd); | |
484 | return ERR_PTR(-EFAULT); | |
485 | } | |
486 | } | |
487 | ||
488 | /* u32 pd handle */ | |
489 | return &pd->ibpd; | |
490 | ||
491 | freepd: | |
492 | kfree(pd); | |
493 | err: | |
494 | atomic_dec(&dev->num_pds); | |
495 | return ptr; | |
496 | } | |
497 | ||
498 | /** | |
499 | * pvrdma_dealloc_pd - deallocate protection domain | |
500 | * @pd: the protection domain to be released | |
501 | * | |
502 | * @return: 0 on success, otherwise errno. | |
503 | */ | |
504 | int pvrdma_dealloc_pd(struct ib_pd *pd) | |
505 | { | |
506 | struct pvrdma_dev *dev = to_vdev(pd->device); | |
507 | union pvrdma_cmd_req req; | |
508 | struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd; | |
509 | int ret; | |
510 | ||
511 | memset(cmd, 0, sizeof(*cmd)); | |
512 | cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD; | |
513 | cmd->pd_handle = to_vpd(pd)->pd_handle; | |
514 | ||
515 | ret = pvrdma_cmd_post(dev, &req, NULL, 0); | |
516 | if (ret) | |
517 | dev_warn(&dev->pdev->dev, | |
518 | "could not dealloc protection domain, error: %d\n", | |
519 | ret); | |
520 | ||
521 | kfree(to_vpd(pd)); | |
522 | atomic_dec(&dev->num_pds); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | /** | |
528 | * pvrdma_create_ah - create an address handle | |
529 | * @pd: the protection domain | |
530 | * @ah_attr: the attributes of the AH | |
531 | * @udata: user data blob | |
532 | * | |
533 | * @return: the ib_ah pointer on success, otherwise errno. | |
534 | */ | |
90898850 | 535 | struct ib_ah *pvrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr, |
29c8d9eb AR |
536 | struct ib_udata *udata) |
537 | { | |
538 | struct pvrdma_dev *dev = to_vdev(pd->device); | |
539 | struct pvrdma_ah *ah; | |
d8966fcd DC |
540 | const struct ib_global_route *grh; |
541 | u8 port_num = rdma_ah_get_port_num(ah_attr); | |
29c8d9eb | 542 | |
d8966fcd | 543 | if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) |
29c8d9eb | 544 | return ERR_PTR(-EINVAL); |
29c8d9eb | 545 | |
44c58487 DC |
546 | grh = rdma_ah_read_grh(ah_attr); |
547 | if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) || | |
d8966fcd | 548 | rdma_is_multicast_addr((struct in6_addr *)grh->dgid.raw)) |
29c8d9eb AR |
549 | return ERR_PTR(-EINVAL); |
550 | ||
551 | if (!atomic_add_unless(&dev->num_ahs, 1, dev->dsr->caps.max_ah)) | |
552 | return ERR_PTR(-ENOMEM); | |
553 | ||
554 | ah = kzalloc(sizeof(*ah), GFP_KERNEL); | |
555 | if (!ah) { | |
556 | atomic_dec(&dev->num_ahs); | |
557 | return ERR_PTR(-ENOMEM); | |
558 | } | |
559 | ||
d8966fcd DC |
560 | ah->av.port_pd = to_vpd(pd)->pd_handle | (port_num << 24); |
561 | ah->av.src_path_bits = rdma_ah_get_path_bits(ah_attr); | |
29c8d9eb | 562 | ah->av.src_path_bits |= 0x80; |
d8966fcd DC |
563 | ah->av.gid_index = grh->sgid_index; |
564 | ah->av.hop_limit = grh->hop_limit; | |
565 | ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) | | |
566 | grh->flow_label; | |
567 | memcpy(ah->av.dgid, grh->dgid.raw, 16); | |
44c58487 | 568 | memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN); |
29c8d9eb AR |
569 | |
570 | ah->ibah.device = pd->device; | |
571 | ah->ibah.pd = pd; | |
572 | ah->ibah.uobject = NULL; | |
573 | ||
574 | return &ah->ibah; | |
575 | } | |
576 | ||
577 | /** | |
578 | * pvrdma_destroy_ah - destroy an address handle | |
579 | * @ah: the address handle to destroyed | |
580 | * | |
581 | * @return: 0 on success. | |
582 | */ | |
583 | int pvrdma_destroy_ah(struct ib_ah *ah) | |
584 | { | |
585 | struct pvrdma_dev *dev = to_vdev(ah->device); | |
586 | ||
587 | kfree(to_vah(ah)); | |
588 | atomic_dec(&dev->num_ahs); | |
589 | ||
590 | return 0; | |
591 | } |