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#include <rdma/uverbs_ioctl.h>
54
55#include "pvrdma.h"
56
57/**
58 * pvrdma_query_device - query device
59 * @ibdev: the device to query
60 * @props: the device properties
61 * @uhw: user data
62 *
63 * @return: 0 on success, otherwise negative errno
64 */
65int pvrdma_query_device(struct ib_device *ibdev,
66 struct ib_device_attr *props,
67 struct ib_udata *uhw)
68{
69 struct pvrdma_dev *dev = to_vdev(ibdev);
70
71 if (uhw->inlen || uhw->outlen)
72 return -EINVAL;
73
74 props->fw_ver = dev->dsr->caps.fw_ver;
75 props->sys_image_guid = dev->dsr->caps.sys_image_guid;
76 props->max_mr_size = dev->dsr->caps.max_mr_size;
77 props->page_size_cap = dev->dsr->caps.page_size_cap;
78 props->vendor_id = dev->dsr->caps.vendor_id;
79 props->vendor_part_id = dev->pdev->device;
80 props->hw_ver = dev->dsr->caps.hw_ver;
81 props->max_qp = dev->dsr->caps.max_qp;
82 props->max_qp_wr = dev->dsr->caps.max_qp_wr;
83 props->device_cap_flags = dev->dsr->caps.device_cap_flags;
84 props->max_send_sge = dev->dsr->caps.max_sge;
85 props->max_recv_sge = dev->dsr->caps.max_sge;
86 props->max_sge_rd = PVRDMA_GET_CAP(dev, dev->dsr->caps.max_sge,
87 dev->dsr->caps.max_sge_rd);
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;
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;
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);
112 }
113
114 props->device_cap_flags |= IB_DEVICE_PORT_ACTIVE_EVENT |
115 IB_DEVICE_RC_RNR_NAK_GEN;
116
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 */
128int pvrdma_query_port(struct ib_device *ibdev, u32 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: &req, rsp: &rsp, resp_code: 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
149 /* props being zeroed by the caller, avoid zeroing it here */
150
151 props->state = pvrdma_port_state_to_ib(state: resp->attrs.state);
152 props->max_mtu = pvrdma_mtu_to_ib(mtu: resp->attrs.max_mtu);
153 props->active_mtu = pvrdma_mtu_to_ib(mtu: 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(flags: resp->attrs.port_cap_flags);
157 props->port_cap_flags |= IB_PORT_CM_SUP;
158 props->ip_gids = true;
159 props->max_msg_sz = resp->attrs.max_msg_sz;
160 props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;
161 props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;
162 props->pkey_tbl_len = resp->attrs.pkey_tbl_len;
163 props->lid = resp->attrs.lid;
164 props->sm_lid = resp->attrs.sm_lid;
165 props->lmc = resp->attrs.lmc;
166 props->max_vl_num = resp->attrs.max_vl_num;
167 props->sm_sl = resp->attrs.sm_sl;
168 props->subnet_timeout = resp->attrs.subnet_timeout;
169 props->init_type_reply = resp->attrs.init_type_reply;
170 props->active_width = pvrdma_port_width_to_ib(width: resp->attrs.active_width);
171 props->active_speed = pvrdma_port_speed_to_ib(speed: resp->attrs.active_speed);
172 props->phys_state = resp->attrs.phys_state;
173
174 return 0;
175}
176
177/**
178 * pvrdma_query_gid - query device gid
179 * @ibdev: the device to query
180 * @port: the port number
181 * @index: the index
182 * @gid: the device gid value
183 *
184 * @return: 0 on success, otherwise negative errno
185 */
186int pvrdma_query_gid(struct ib_device *ibdev, u32 port, int index,
187 union ib_gid *gid)
188{
189 struct pvrdma_dev *dev = to_vdev(ibdev);
190
191 if (index >= dev->dsr->caps.gid_tbl_len)
192 return -EINVAL;
193
194 memcpy(gid, &dev->sgid_tbl[index], sizeof(union ib_gid));
195
196 return 0;
197}
198
199/**
200 * pvrdma_query_pkey - query device port's P_Key table
201 * @ibdev: the device to query
202 * @port: the port number
203 * @index: the index
204 * @pkey: the device P_Key value
205 *
206 * @return: 0 on success, otherwise negative errno
207 */
208int pvrdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
209 u16 *pkey)
210{
211 int err = 0;
212 union pvrdma_cmd_req req;
213 union pvrdma_cmd_resp rsp;
214 struct pvrdma_cmd_query_pkey *cmd = &req.query_pkey;
215
216 memset(cmd, 0, sizeof(*cmd));
217 cmd->hdr.cmd = PVRDMA_CMD_QUERY_PKEY;
218 cmd->port_num = port;
219 cmd->index = index;
220
221 err = pvrdma_cmd_post(dev: to_vdev(ibdev), req: &req, rsp: &rsp,
222 resp_code: PVRDMA_CMD_QUERY_PKEY_RESP);
223 if (err < 0) {
224 dev_warn(&to_vdev(ibdev)->pdev->dev,
225 "could not query pkey, error: %d\n", err);
226 return err;
227 }
228
229 *pkey = rsp.query_pkey_resp.pkey;
230
231 return 0;
232}
233
234enum rdma_link_layer pvrdma_port_link_layer(struct ib_device *ibdev,
235 u32 port)
236{
237 return IB_LINK_LAYER_ETHERNET;
238}
239
240/**
241 * pvrdma_modify_port - modify device port attributes
242 * @ibdev: the device to modify
243 * @port: the port number
244 * @mask: attributes to modify
245 * @props: the device properties
246 *
247 * @return: 0 on success, otherwise negative errno
248 */
249int pvrdma_modify_port(struct ib_device *ibdev, u32 port, int mask,
250 struct ib_port_modify *props)
251{
252 struct ib_port_attr attr;
253 struct pvrdma_dev *vdev = to_vdev(ibdev);
254 int ret;
255
256 if (mask & ~IB_PORT_SHUTDOWN) {
257 dev_warn(&vdev->pdev->dev,
258 "unsupported port modify mask %#x\n", mask);
259 return -EOPNOTSUPP;
260 }
261
262 mutex_lock(&vdev->port_mutex);
263 ret = ib_query_port(device: ibdev, port_num: port, port_attr: &attr);
264 if (ret)
265 goto out;
266
267 vdev->port_cap_mask |= props->set_port_cap_mask;
268 vdev->port_cap_mask &= ~props->clr_port_cap_mask;
269
270 if (mask & IB_PORT_SHUTDOWN)
271 vdev->ib_active = false;
272
273out:
274 mutex_unlock(lock: &vdev->port_mutex);
275 return ret;
276}
277
278/**
279 * pvrdma_alloc_ucontext - allocate ucontext
280 * @uctx: the uverbs countext
281 * @udata: user data
282 *
283 * @return: zero on success, otherwise errno.
284 */
285int pvrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
286{
287 struct ib_device *ibdev = uctx->device;
288 struct pvrdma_dev *vdev = to_vdev(ibdev);
289 struct pvrdma_ucontext *context = to_vucontext(ibucontext: uctx);
290 union pvrdma_cmd_req req = {};
291 union pvrdma_cmd_resp rsp = {};
292 struct pvrdma_cmd_create_uc *cmd = &req.create_uc;
293 struct pvrdma_cmd_create_uc_resp *resp = &rsp.create_uc_resp;
294 struct pvrdma_alloc_ucontext_resp uresp = {};
295 int ret;
296
297 if (!vdev->ib_active)
298 return -EAGAIN;
299
300 context->dev = vdev;
301 ret = pvrdma_uar_alloc(dev: vdev, uar: &context->uar);
302 if (ret)
303 return -ENOMEM;
304
305 /* get ctx_handle from host */
306 if (vdev->dsr_version < PVRDMA_PPN64_VERSION)
307 cmd->pfn = context->uar.pfn;
308 else
309 cmd->pfn64 = context->uar.pfn;
310
311 cmd->hdr.cmd = PVRDMA_CMD_CREATE_UC;
312 ret = pvrdma_cmd_post(dev: vdev, req: &req, rsp: &rsp, resp_code: PVRDMA_CMD_CREATE_UC_RESP);
313 if (ret < 0) {
314 dev_warn(&vdev->pdev->dev,
315 "could not create ucontext, error: %d\n", ret);
316 goto err;
317 }
318
319 context->ctx_handle = resp->ctx_handle;
320
321 /* copy back to user */
322 uresp.qp_tab_size = vdev->dsr->caps.max_qp;
323 ret = ib_copy_to_udata(udata, src: &uresp, len: sizeof(uresp));
324 if (ret) {
325 pvrdma_uar_free(dev: vdev, uar: &context->uar);
326 pvrdma_dealloc_ucontext(context: &context->ibucontext);
327 return -EFAULT;
328 }
329
330 return 0;
331
332err:
333 pvrdma_uar_free(dev: vdev, uar: &context->uar);
334 return ret;
335}
336
337/**
338 * pvrdma_dealloc_ucontext - deallocate ucontext
339 * @ibcontext: the ucontext
340 */
341void pvrdma_dealloc_ucontext(struct ib_ucontext *ibcontext)
342{
343 struct pvrdma_ucontext *context = to_vucontext(ibucontext: ibcontext);
344 union pvrdma_cmd_req req = {};
345 struct pvrdma_cmd_destroy_uc *cmd = &req.destroy_uc;
346 int ret;
347
348 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_UC;
349 cmd->ctx_handle = context->ctx_handle;
350
351 ret = pvrdma_cmd_post(dev: context->dev, req: &req, NULL, resp_code: 0);
352 if (ret < 0)
353 dev_warn(&context->dev->pdev->dev,
354 "destroy ucontext failed, error: %d\n", ret);
355
356 /* Free the UAR even if the device command failed */
357 pvrdma_uar_free(dev: to_vdev(ibdev: ibcontext->device), uar: &context->uar);
358}
359
360/**
361 * pvrdma_mmap - create mmap region
362 * @ibcontext: the user context
363 * @vma: the VMA
364 *
365 * @return: 0 on success, otherwise errno.
366 */
367int pvrdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
368{
369 struct pvrdma_ucontext *context = to_vucontext(ibucontext: ibcontext);
370 unsigned long start = vma->vm_start;
371 unsigned long size = vma->vm_end - vma->vm_start;
372 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
373
374 dev_dbg(&context->dev->pdev->dev, "create mmap region\n");
375
376 if ((size != PAGE_SIZE) || (offset & ~PAGE_MASK)) {
377 dev_warn(&context->dev->pdev->dev,
378 "invalid params for mmap region\n");
379 return -EINVAL;
380 }
381
382 /* Map UAR to kernel space, VM_LOCKED? */
383 vm_flags_set(vma, VM_DONTCOPY | VM_DONTEXPAND);
384 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
385 if (io_remap_pfn_range(vma, addr: start, orig_pfn: context->uar.pfn, size,
386 orig_prot: vma->vm_page_prot))
387 return -EAGAIN;
388
389 return 0;
390}
391
392/**
393 * pvrdma_alloc_pd - allocate protection domain
394 * @ibpd: PD pointer
395 * @udata: user data
396 *
397 * @return: the ib_pd protection domain pointer on success, otherwise errno.
398 */
399int pvrdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
400{
401 struct ib_device *ibdev = ibpd->device;
402 struct pvrdma_pd *pd = to_vpd(ibpd);
403 struct pvrdma_dev *dev = to_vdev(ibdev);
404 union pvrdma_cmd_req req = {};
405 union pvrdma_cmd_resp rsp = {};
406 struct pvrdma_cmd_create_pd *cmd = &req.create_pd;
407 struct pvrdma_cmd_create_pd_resp *resp = &rsp.create_pd_resp;
408 struct pvrdma_alloc_pd_resp pd_resp = {0};
409 int ret;
410 struct pvrdma_ucontext *context = rdma_udata_to_drv_context(
411 udata, struct pvrdma_ucontext, ibucontext);
412
413 /* Check allowed max pds */
414 if (!atomic_add_unless(v: &dev->num_pds, a: 1, u: dev->dsr->caps.max_pd))
415 return -ENOMEM;
416
417 cmd->hdr.cmd = PVRDMA_CMD_CREATE_PD;
418 cmd->ctx_handle = context ? context->ctx_handle : 0;
419 ret = pvrdma_cmd_post(dev, req: &req, rsp: &rsp, resp_code: PVRDMA_CMD_CREATE_PD_RESP);
420 if (ret < 0) {
421 dev_warn(&dev->pdev->dev,
422 "failed to allocate protection domain, error: %d\n",
423 ret);
424 goto err;
425 }
426
427 pd->privileged = !udata;
428 pd->pd_handle = resp->pd_handle;
429 pd->pdn = resp->pd_handle;
430 pd_resp.pdn = resp->pd_handle;
431
432 if (udata) {
433 if (ib_copy_to_udata(udata, src: &pd_resp, len: sizeof(pd_resp))) {
434 dev_warn(&dev->pdev->dev,
435 "failed to copy back protection domain\n");
436 pvrdma_dealloc_pd(ibpd: &pd->ibpd, udata);
437 return -EFAULT;
438 }
439 }
440
441 /* u32 pd handle */
442 return 0;
443
444err:
445 atomic_dec(v: &dev->num_pds);
446 return ret;
447}
448
449/**
450 * pvrdma_dealloc_pd - deallocate protection domain
451 * @pd: the protection domain to be released
452 * @udata: user data or null for kernel object
453 *
454 * @return: Always 0
455 */
456int pvrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
457{
458 struct pvrdma_dev *dev = to_vdev(ibdev: pd->device);
459 union pvrdma_cmd_req req = {};
460 struct pvrdma_cmd_destroy_pd *cmd = &req.destroy_pd;
461 int ret;
462
463 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_PD;
464 cmd->pd_handle = to_vpd(ibpd: pd)->pd_handle;
465
466 ret = pvrdma_cmd_post(dev, req: &req, NULL, resp_code: 0);
467 if (ret)
468 dev_warn(&dev->pdev->dev,
469 "could not dealloc protection domain, error: %d\n",
470 ret);
471
472 atomic_dec(v: &dev->num_pds);
473 return 0;
474}
475
476/**
477 * pvrdma_create_ah - create an address handle
478 * @ibah: the IB address handle
479 * @init_attr: the attributes of the AH
480 * @udata: pointer to user data
481 *
482 * @return: 0 on success, otherwise errno.
483 */
484int pvrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
485 struct ib_udata *udata)
486{
487 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
488 struct pvrdma_dev *dev = to_vdev(ibdev: ibah->device);
489 struct pvrdma_ah *ah = to_vah(ibah);
490 const struct ib_global_route *grh;
491 u32 port_num = rdma_ah_get_port_num(attr: ah_attr);
492
493 if (!(rdma_ah_get_ah_flags(attr: ah_attr) & IB_AH_GRH))
494 return -EINVAL;
495
496 grh = rdma_ah_read_grh(attr: ah_attr);
497 if ((ah_attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
498 rdma_is_multicast_addr(addr: (struct in6_addr *)grh->dgid.raw))
499 return -EINVAL;
500
501 if (!atomic_add_unless(v: &dev->num_ahs, a: 1, u: dev->dsr->caps.max_ah))
502 return -ENOMEM;
503
504 ah->av.port_pd = to_vpd(ibpd: ibah->pd)->pd_handle | (port_num << 24);
505 ah->av.src_path_bits = rdma_ah_get_path_bits(attr: ah_attr);
506 ah->av.src_path_bits |= 0x80;
507 ah->av.gid_index = grh->sgid_index;
508 ah->av.hop_limit = grh->hop_limit;
509 ah->av.sl_tclass_flowlabel = (grh->traffic_class << 20) |
510 grh->flow_label;
511 memcpy(ah->av.dgid, grh->dgid.raw, 16);
512 memcpy(ah->av.dmac, ah_attr->roce.dmac, ETH_ALEN);
513
514 return 0;
515}
516
517/**
518 * pvrdma_destroy_ah - destroy an address handle
519 * @ah: the address handle to destroyed
520 * @flags: destroy address handle flags (see enum rdma_destroy_ah_flags)
521 *
522 */
523int pvrdma_destroy_ah(struct ib_ah *ah, u32 flags)
524{
525 struct pvrdma_dev *dev = to_vdev(ibdev: ah->device);
526
527 atomic_dec(v: &dev->num_ahs);
528 return 0;
529}
530

source code of linux/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c