1 /*
2 * Broadcom NetXtreme-E RoCE driver.
3 *
4 * Copyright (c) 2016 - 2017, Broadcom. All rights reserved. The term
5 * Broadcom refers to Broadcom Limited and/or its subsidiaries.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
22 * distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
34 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 * Description: IB Verbs interpreter
37 */
38
39 #include <linux/interrupt.h>
40 #include <linux/types.h>
41 #include <linux/pci.h>
42 #include <linux/netdevice.h>
43 #include <linux/if_ether.h>
44
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_user_verbs.h>
47 #include <rdma/ib_umem.h>
48 #include <rdma/ib_addr.h>
49 #include <rdma/ib_mad.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/uverbs_ioctl.h>
52
53 #include "bnxt_ulp.h"
54
55 #include "roce_hsi.h"
56 #include "qplib_res.h"
57 #include "qplib_sp.h"
58 #include "qplib_fp.h"
59 #include "qplib_rcfw.h"
60
61 #include "bnxt_re.h"
62 #include "ib_verbs.h"
63 #include <rdma/bnxt_re-abi.h>
64
__from_ib_access_flags(int iflags)65 static int __from_ib_access_flags(int iflags)
66 {
67 int qflags = 0;
68
69 if (iflags & IB_ACCESS_LOCAL_WRITE)
70 qflags |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
71 if (iflags & IB_ACCESS_REMOTE_READ)
72 qflags |= BNXT_QPLIB_ACCESS_REMOTE_READ;
73 if (iflags & IB_ACCESS_REMOTE_WRITE)
74 qflags |= BNXT_QPLIB_ACCESS_REMOTE_WRITE;
75 if (iflags & IB_ACCESS_REMOTE_ATOMIC)
76 qflags |= BNXT_QPLIB_ACCESS_REMOTE_ATOMIC;
77 if (iflags & IB_ACCESS_MW_BIND)
78 qflags |= BNXT_QPLIB_ACCESS_MW_BIND;
79 if (iflags & IB_ZERO_BASED)
80 qflags |= BNXT_QPLIB_ACCESS_ZERO_BASED;
81 if (iflags & IB_ACCESS_ON_DEMAND)
82 qflags |= BNXT_QPLIB_ACCESS_ON_DEMAND;
83 return qflags;
84 };
85
__to_ib_access_flags(int qflags)86 static enum ib_access_flags __to_ib_access_flags(int qflags)
87 {
88 enum ib_access_flags iflags = 0;
89
90 if (qflags & BNXT_QPLIB_ACCESS_LOCAL_WRITE)
91 iflags |= IB_ACCESS_LOCAL_WRITE;
92 if (qflags & BNXT_QPLIB_ACCESS_REMOTE_WRITE)
93 iflags |= IB_ACCESS_REMOTE_WRITE;
94 if (qflags & BNXT_QPLIB_ACCESS_REMOTE_READ)
95 iflags |= IB_ACCESS_REMOTE_READ;
96 if (qflags & BNXT_QPLIB_ACCESS_REMOTE_ATOMIC)
97 iflags |= IB_ACCESS_REMOTE_ATOMIC;
98 if (qflags & BNXT_QPLIB_ACCESS_MW_BIND)
99 iflags |= IB_ACCESS_MW_BIND;
100 if (qflags & BNXT_QPLIB_ACCESS_ZERO_BASED)
101 iflags |= IB_ZERO_BASED;
102 if (qflags & BNXT_QPLIB_ACCESS_ON_DEMAND)
103 iflags |= IB_ACCESS_ON_DEMAND;
104 return iflags;
105 };
106
bnxt_re_build_sgl(struct ib_sge * ib_sg_list,struct bnxt_qplib_sge * sg_list,int num)107 static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
108 struct bnxt_qplib_sge *sg_list, int num)
109 {
110 int i, total = 0;
111
112 for (i = 0; i < num; i++) {
113 sg_list[i].addr = ib_sg_list[i].addr;
114 sg_list[i].lkey = ib_sg_list[i].lkey;
115 sg_list[i].size = ib_sg_list[i].length;
116 total += sg_list[i].size;
117 }
118 return total;
119 }
120
121 /* Device */
bnxt_re_query_device(struct ib_device * ibdev,struct ib_device_attr * ib_attr,struct ib_udata * udata)122 int bnxt_re_query_device(struct ib_device *ibdev,
123 struct ib_device_attr *ib_attr,
124 struct ib_udata *udata)
125 {
126 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
127 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
128
129 memset(ib_attr, 0, sizeof(*ib_attr));
130 memcpy(&ib_attr->fw_ver, dev_attr->fw_ver,
131 min(sizeof(dev_attr->fw_ver),
132 sizeof(ib_attr->fw_ver)));
133 bnxt_qplib_get_guid(rdev->netdev->dev_addr,
134 (u8 *)&ib_attr->sys_image_guid);
135 ib_attr->max_mr_size = BNXT_RE_MAX_MR_SIZE;
136 ib_attr->page_size_cap = BNXT_RE_PAGE_SIZE_4K | BNXT_RE_PAGE_SIZE_2M;
137
138 ib_attr->vendor_id = rdev->en_dev->pdev->vendor;
139 ib_attr->vendor_part_id = rdev->en_dev->pdev->device;
140 ib_attr->hw_ver = rdev->en_dev->pdev->subsystem_device;
141 ib_attr->max_qp = dev_attr->max_qp;
142 ib_attr->max_qp_wr = dev_attr->max_qp_wqes;
143 ib_attr->device_cap_flags =
144 IB_DEVICE_CURR_QP_STATE_MOD
145 | IB_DEVICE_RC_RNR_NAK_GEN
146 | IB_DEVICE_SHUTDOWN_PORT
147 | IB_DEVICE_SYS_IMAGE_GUID
148 | IB_DEVICE_LOCAL_DMA_LKEY
149 | IB_DEVICE_RESIZE_MAX_WR
150 | IB_DEVICE_PORT_ACTIVE_EVENT
151 | IB_DEVICE_N_NOTIFY_CQ
152 | IB_DEVICE_MEM_WINDOW
153 | IB_DEVICE_MEM_WINDOW_TYPE_2B
154 | IB_DEVICE_MEM_MGT_EXTENSIONS;
155 ib_attr->max_send_sge = dev_attr->max_qp_sges;
156 ib_attr->max_recv_sge = dev_attr->max_qp_sges;
157 ib_attr->max_sge_rd = dev_attr->max_qp_sges;
158 ib_attr->max_cq = dev_attr->max_cq;
159 ib_attr->max_cqe = dev_attr->max_cq_wqes;
160 ib_attr->max_mr = dev_attr->max_mr;
161 ib_attr->max_pd = dev_attr->max_pd;
162 ib_attr->max_qp_rd_atom = dev_attr->max_qp_rd_atom;
163 ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
164 ib_attr->atomic_cap = IB_ATOMIC_NONE;
165 ib_attr->masked_atomic_cap = IB_ATOMIC_NONE;
166
167 ib_attr->max_ee_rd_atom = 0;
168 ib_attr->max_res_rd_atom = 0;
169 ib_attr->max_ee_init_rd_atom = 0;
170 ib_attr->max_ee = 0;
171 ib_attr->max_rdd = 0;
172 ib_attr->max_mw = dev_attr->max_mw;
173 ib_attr->max_raw_ipv6_qp = 0;
174 ib_attr->max_raw_ethy_qp = dev_attr->max_raw_ethy_qp;
175 ib_attr->max_mcast_grp = 0;
176 ib_attr->max_mcast_qp_attach = 0;
177 ib_attr->max_total_mcast_qp_attach = 0;
178 ib_attr->max_ah = dev_attr->max_ah;
179
180 ib_attr->max_srq = dev_attr->max_srq;
181 ib_attr->max_srq_wr = dev_attr->max_srq_wqes;
182 ib_attr->max_srq_sge = dev_attr->max_srq_sges;
183
184 ib_attr->max_fast_reg_page_list_len = MAX_PBL_LVL_1_PGS;
185
186 ib_attr->max_pkeys = 1;
187 ib_attr->local_ca_ack_delay = BNXT_RE_DEFAULT_ACK_DELAY;
188 return 0;
189 }
190
191 /* Port */
bnxt_re_query_port(struct ib_device * ibdev,u8 port_num,struct ib_port_attr * port_attr)192 int bnxt_re_query_port(struct ib_device *ibdev, u8 port_num,
193 struct ib_port_attr *port_attr)
194 {
195 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
196 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
197
198 memset(port_attr, 0, sizeof(*port_attr));
199
200 if (netif_running(rdev->netdev) && netif_carrier_ok(rdev->netdev)) {
201 port_attr->state = IB_PORT_ACTIVE;
202 port_attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
203 } else {
204 port_attr->state = IB_PORT_DOWN;
205 port_attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
206 }
207 port_attr->max_mtu = IB_MTU_4096;
208 port_attr->active_mtu = iboe_get_mtu(rdev->netdev->mtu);
209 port_attr->gid_tbl_len = dev_attr->max_sgid;
210 port_attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
211 IB_PORT_DEVICE_MGMT_SUP |
212 IB_PORT_VENDOR_CLASS_SUP;
213 port_attr->ip_gids = true;
214
215 port_attr->max_msg_sz = (u32)BNXT_RE_MAX_MR_SIZE_LOW;
216 port_attr->bad_pkey_cntr = 0;
217 port_attr->qkey_viol_cntr = 0;
218 port_attr->pkey_tbl_len = dev_attr->max_pkey;
219 port_attr->lid = 0;
220 port_attr->sm_lid = 0;
221 port_attr->lmc = 0;
222 port_attr->max_vl_num = 4;
223 port_attr->sm_sl = 0;
224 port_attr->subnet_timeout = 0;
225 port_attr->init_type_reply = 0;
226 port_attr->active_speed = rdev->active_speed;
227 port_attr->active_width = rdev->active_width;
228
229 return 0;
230 }
231
bnxt_re_get_port_immutable(struct ib_device * ibdev,u8 port_num,struct ib_port_immutable * immutable)232 int bnxt_re_get_port_immutable(struct ib_device *ibdev, u8 port_num,
233 struct ib_port_immutable *immutable)
234 {
235 struct ib_port_attr port_attr;
236
237 if (bnxt_re_query_port(ibdev, port_num, &port_attr))
238 return -EINVAL;
239
240 immutable->pkey_tbl_len = port_attr.pkey_tbl_len;
241 immutable->gid_tbl_len = port_attr.gid_tbl_len;
242 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
243 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
244 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
245 return 0;
246 }
247
bnxt_re_query_fw_str(struct ib_device * ibdev,char * str)248 void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str)
249 {
250 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
251
252 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d",
253 rdev->dev_attr.fw_ver[0], rdev->dev_attr.fw_ver[1],
254 rdev->dev_attr.fw_ver[2], rdev->dev_attr.fw_ver[3]);
255 }
256
bnxt_re_query_pkey(struct ib_device * ibdev,u8 port_num,u16 index,u16 * pkey)257 int bnxt_re_query_pkey(struct ib_device *ibdev, u8 port_num,
258 u16 index, u16 *pkey)
259 {
260 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
261
262 /* Ignore port_num */
263
264 memset(pkey, 0, sizeof(*pkey));
265 return bnxt_qplib_get_pkey(&rdev->qplib_res,
266 &rdev->qplib_res.pkey_tbl, index, pkey);
267 }
268
bnxt_re_query_gid(struct ib_device * ibdev,u8 port_num,int index,union ib_gid * gid)269 int bnxt_re_query_gid(struct ib_device *ibdev, u8 port_num,
270 int index, union ib_gid *gid)
271 {
272 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
273 int rc = 0;
274
275 /* Ignore port_num */
276 memset(gid, 0, sizeof(*gid));
277 rc = bnxt_qplib_get_sgid(&rdev->qplib_res,
278 &rdev->qplib_res.sgid_tbl, index,
279 (struct bnxt_qplib_gid *)gid);
280 return rc;
281 }
282
bnxt_re_del_gid(const struct ib_gid_attr * attr,void ** context)283 int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context)
284 {
285 int rc = 0;
286 struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
287 struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
288 struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
289 struct bnxt_qplib_gid *gid_to_del;
290 u16 vlan_id = 0xFFFF;
291
292 /* Delete the entry from the hardware */
293 ctx = *context;
294 if (!ctx)
295 return -EINVAL;
296
297 if (sgid_tbl && sgid_tbl->active) {
298 if (ctx->idx >= sgid_tbl->max)
299 return -EINVAL;
300 gid_to_del = &sgid_tbl->tbl[ctx->idx].gid;
301 vlan_id = sgid_tbl->tbl[ctx->idx].vlan_id;
302 /* DEL_GID is called in WQ context(netdevice_event_work_handler)
303 * or via the ib_unregister_device path. In the former case QP1
304 * may not be destroyed yet, in which case just return as FW
305 * needs that entry to be present and will fail it's deletion.
306 * We could get invoked again after QP1 is destroyed OR get an
307 * ADD_GID call with a different GID value for the same index
308 * where we issue MODIFY_GID cmd to update the GID entry -- TBD
309 */
310 if (ctx->idx == 0 &&
311 rdma_link_local_addr((struct in6_addr *)gid_to_del) &&
312 ctx->refcnt == 1 && rdev->gsi_ctx.gsi_sqp) {
313 ibdev_dbg(&rdev->ibdev,
314 "Trying to delete GID0 while QP1 is alive\n");
315 return -EFAULT;
316 }
317 ctx->refcnt--;
318 if (!ctx->refcnt) {
319 rc = bnxt_qplib_del_sgid(sgid_tbl, gid_to_del,
320 vlan_id, true);
321 if (rc) {
322 ibdev_err(&rdev->ibdev,
323 "Failed to remove GID: %#x", rc);
324 } else {
325 ctx_tbl = sgid_tbl->ctx;
326 ctx_tbl[ctx->idx] = NULL;
327 kfree(ctx);
328 }
329 }
330 } else {
331 return -EINVAL;
332 }
333 return rc;
334 }
335
bnxt_re_add_gid(const struct ib_gid_attr * attr,void ** context)336 int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context)
337 {
338 int rc;
339 u32 tbl_idx = 0;
340 u16 vlan_id = 0xFFFF;
341 struct bnxt_re_gid_ctx *ctx, **ctx_tbl;
342 struct bnxt_re_dev *rdev = to_bnxt_re_dev(attr->device, ibdev);
343 struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
344
345 rc = rdma_read_gid_l2_fields(attr, &vlan_id, NULL);
346 if (rc)
347 return rc;
348
349 rc = bnxt_qplib_add_sgid(sgid_tbl, (struct bnxt_qplib_gid *)&attr->gid,
350 rdev->qplib_res.netdev->dev_addr,
351 vlan_id, true, &tbl_idx);
352 if (rc == -EALREADY) {
353 ctx_tbl = sgid_tbl->ctx;
354 ctx_tbl[tbl_idx]->refcnt++;
355 *context = ctx_tbl[tbl_idx];
356 return 0;
357 }
358
359 if (rc < 0) {
360 ibdev_err(&rdev->ibdev, "Failed to add GID: %#x", rc);
361 return rc;
362 }
363
364 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
365 if (!ctx)
366 return -ENOMEM;
367 ctx_tbl = sgid_tbl->ctx;
368 ctx->idx = tbl_idx;
369 ctx->refcnt = 1;
370 ctx_tbl[tbl_idx] = ctx;
371 *context = ctx;
372
373 return rc;
374 }
375
bnxt_re_get_link_layer(struct ib_device * ibdev,u8 port_num)376 enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
377 u8 port_num)
378 {
379 return IB_LINK_LAYER_ETHERNET;
380 }
381
382 #define BNXT_RE_FENCE_PBL_SIZE DIV_ROUND_UP(BNXT_RE_FENCE_BYTES, PAGE_SIZE)
383
bnxt_re_create_fence_wqe(struct bnxt_re_pd * pd)384 static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
385 {
386 struct bnxt_re_fence_data *fence = &pd->fence;
387 struct ib_mr *ib_mr = &fence->mr->ib_mr;
388 struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
389
390 memset(wqe, 0, sizeof(*wqe));
391 wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
392 wqe->wr_id = BNXT_QPLIB_FENCE_WRID;
393 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
394 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
395 wqe->bind.zero_based = false;
396 wqe->bind.parent_l_key = ib_mr->lkey;
397 wqe->bind.va = (u64)(unsigned long)fence->va;
398 wqe->bind.length = fence->size;
399 wqe->bind.access_cntl = __from_ib_access_flags(IB_ACCESS_REMOTE_READ);
400 wqe->bind.mw_type = SQ_BIND_MW_TYPE_TYPE1;
401
402 /* Save the initial rkey in fence structure for now;
403 * wqe->bind.r_key will be set at (re)bind time.
404 */
405 fence->bind_rkey = ib_inc_rkey(fence->mw->rkey);
406 }
407
bnxt_re_bind_fence_mw(struct bnxt_qplib_qp * qplib_qp)408 static int bnxt_re_bind_fence_mw(struct bnxt_qplib_qp *qplib_qp)
409 {
410 struct bnxt_re_qp *qp = container_of(qplib_qp, struct bnxt_re_qp,
411 qplib_qp);
412 struct ib_pd *ib_pd = qp->ib_qp.pd;
413 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
414 struct bnxt_re_fence_data *fence = &pd->fence;
415 struct bnxt_qplib_swqe *fence_wqe = &fence->bind_wqe;
416 struct bnxt_qplib_swqe wqe;
417 int rc;
418
419 memcpy(&wqe, fence_wqe, sizeof(wqe));
420 wqe.bind.r_key = fence->bind_rkey;
421 fence->bind_rkey = ib_inc_rkey(fence->bind_rkey);
422
423 ibdev_dbg(&qp->rdev->ibdev,
424 "Posting bind fence-WQE: rkey: %#x QP: %d PD: %p\n",
425 wqe.bind.r_key, qp->qplib_qp.id, pd);
426 rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
427 if (rc) {
428 ibdev_err(&qp->rdev->ibdev, "Failed to bind fence-WQE\n");
429 return rc;
430 }
431 bnxt_qplib_post_send_db(&qp->qplib_qp);
432
433 return rc;
434 }
435
bnxt_re_destroy_fence_mr(struct bnxt_re_pd * pd)436 static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
437 {
438 struct bnxt_re_fence_data *fence = &pd->fence;
439 struct bnxt_re_dev *rdev = pd->rdev;
440 struct device *dev = &rdev->en_dev->pdev->dev;
441 struct bnxt_re_mr *mr = fence->mr;
442
443 if (fence->mw) {
444 bnxt_re_dealloc_mw(fence->mw);
445 fence->mw = NULL;
446 }
447 if (mr) {
448 if (mr->ib_mr.rkey)
449 bnxt_qplib_dereg_mrw(&rdev->qplib_res, &mr->qplib_mr,
450 true);
451 if (mr->ib_mr.lkey)
452 bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
453 kfree(mr);
454 fence->mr = NULL;
455 }
456 if (fence->dma_addr) {
457 dma_unmap_single(dev, fence->dma_addr, BNXT_RE_FENCE_BYTES,
458 DMA_BIDIRECTIONAL);
459 fence->dma_addr = 0;
460 }
461 }
462
bnxt_re_create_fence_mr(struct bnxt_re_pd * pd)463 static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
464 {
465 int mr_access_flags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_MW_BIND;
466 struct bnxt_re_fence_data *fence = &pd->fence;
467 struct bnxt_re_dev *rdev = pd->rdev;
468 struct device *dev = &rdev->en_dev->pdev->dev;
469 struct bnxt_re_mr *mr = NULL;
470 dma_addr_t dma_addr = 0;
471 struct ib_mw *mw;
472 u64 pbl_tbl;
473 int rc;
474
475 dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
476 DMA_BIDIRECTIONAL);
477 rc = dma_mapping_error(dev, dma_addr);
478 if (rc) {
479 ibdev_err(&rdev->ibdev, "Failed to dma-map fence-MR-mem\n");
480 rc = -EIO;
481 fence->dma_addr = 0;
482 goto fail;
483 }
484 fence->dma_addr = dma_addr;
485
486 /* Allocate a MR */
487 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
488 if (!mr) {
489 rc = -ENOMEM;
490 goto fail;
491 }
492 fence->mr = mr;
493 mr->rdev = rdev;
494 mr->qplib_mr.pd = &pd->qplib_pd;
495 mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
496 mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
497 rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
498 if (rc) {
499 ibdev_err(&rdev->ibdev, "Failed to alloc fence-HW-MR\n");
500 goto fail;
501 }
502
503 /* Register MR */
504 mr->ib_mr.lkey = mr->qplib_mr.lkey;
505 mr->qplib_mr.va = (u64)(unsigned long)fence->va;
506 mr->qplib_mr.total_size = BNXT_RE_FENCE_BYTES;
507 pbl_tbl = dma_addr;
508 rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl_tbl,
509 BNXT_RE_FENCE_PBL_SIZE, false, PAGE_SIZE);
510 if (rc) {
511 ibdev_err(&rdev->ibdev, "Failed to register fence-MR\n");
512 goto fail;
513 }
514 mr->ib_mr.rkey = mr->qplib_mr.rkey;
515
516 /* Create a fence MW only for kernel consumers */
517 mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
518 if (IS_ERR(mw)) {
519 ibdev_err(&rdev->ibdev,
520 "Failed to create fence-MW for PD: %p\n", pd);
521 rc = PTR_ERR(mw);
522 goto fail;
523 }
524 fence->mw = mw;
525
526 bnxt_re_create_fence_wqe(pd);
527 return 0;
528
529 fail:
530 bnxt_re_destroy_fence_mr(pd);
531 return rc;
532 }
533
534 /* Protection Domains */
bnxt_re_dealloc_pd(struct ib_pd * ib_pd,struct ib_udata * udata)535 int bnxt_re_dealloc_pd(struct ib_pd *ib_pd, struct ib_udata *udata)
536 {
537 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
538 struct bnxt_re_dev *rdev = pd->rdev;
539
540 bnxt_re_destroy_fence_mr(pd);
541
542 if (pd->qplib_pd.id)
543 bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
544 &pd->qplib_pd);
545 return 0;
546 }
547
bnxt_re_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)548 int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
549 {
550 struct ib_device *ibdev = ibpd->device;
551 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
552 struct bnxt_re_ucontext *ucntx = rdma_udata_to_drv_context(
553 udata, struct bnxt_re_ucontext, ib_uctx);
554 struct bnxt_re_pd *pd = container_of(ibpd, struct bnxt_re_pd, ib_pd);
555 int rc;
556
557 pd->rdev = rdev;
558 if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) {
559 ibdev_err(&rdev->ibdev, "Failed to allocate HW PD");
560 rc = -ENOMEM;
561 goto fail;
562 }
563
564 if (udata) {
565 struct bnxt_re_pd_resp resp;
566
567 if (!ucntx->dpi.dbr) {
568 /* Allocate DPI in alloc_pd to avoid failing of
569 * ibv_devinfo and family of application when DPIs
570 * are depleted.
571 */
572 if (bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
573 &ucntx->dpi, ucntx)) {
574 rc = -ENOMEM;
575 goto dbfail;
576 }
577 }
578
579 resp.pdid = pd->qplib_pd.id;
580 /* Still allow mapping this DBR to the new user PD. */
581 resp.dpi = ucntx->dpi.dpi;
582 resp.dbr = (u64)ucntx->dpi.umdbr;
583
584 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
585 if (rc) {
586 ibdev_err(&rdev->ibdev,
587 "Failed to copy user response\n");
588 goto dbfail;
589 }
590 }
591
592 if (!udata)
593 if (bnxt_re_create_fence_mr(pd))
594 ibdev_warn(&rdev->ibdev,
595 "Failed to create Fence-MR\n");
596 return 0;
597 dbfail:
598 bnxt_qplib_dealloc_pd(&rdev->qplib_res, &rdev->qplib_res.pd_tbl,
599 &pd->qplib_pd);
600 fail:
601 return rc;
602 }
603
604 /* Address Handles */
bnxt_re_destroy_ah(struct ib_ah * ib_ah,u32 flags)605 int bnxt_re_destroy_ah(struct ib_ah *ib_ah, u32 flags)
606 {
607 struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
608 struct bnxt_re_dev *rdev = ah->rdev;
609
610 bnxt_qplib_destroy_ah(&rdev->qplib_res, &ah->qplib_ah,
611 !(flags & RDMA_DESTROY_AH_SLEEPABLE));
612 return 0;
613 }
614
bnxt_re_stack_to_dev_nw_type(enum rdma_network_type ntype)615 static u8 bnxt_re_stack_to_dev_nw_type(enum rdma_network_type ntype)
616 {
617 u8 nw_type;
618
619 switch (ntype) {
620 case RDMA_NETWORK_IPV4:
621 nw_type = CMDQ_CREATE_AH_TYPE_V2IPV4;
622 break;
623 case RDMA_NETWORK_IPV6:
624 nw_type = CMDQ_CREATE_AH_TYPE_V2IPV6;
625 break;
626 default:
627 nw_type = CMDQ_CREATE_AH_TYPE_V1;
628 break;
629 }
630 return nw_type;
631 }
632
bnxt_re_create_ah(struct ib_ah * ib_ah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)633 int bnxt_re_create_ah(struct ib_ah *ib_ah, struct rdma_ah_init_attr *init_attr,
634 struct ib_udata *udata)
635 {
636 struct ib_pd *ib_pd = ib_ah->pd;
637 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
638 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
639 const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
640 struct bnxt_re_dev *rdev = pd->rdev;
641 const struct ib_gid_attr *sgid_attr;
642 struct bnxt_re_gid_ctx *ctx;
643 struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
644 u8 nw_type;
645 int rc;
646
647 if (!(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) {
648 ibdev_err(&rdev->ibdev, "Failed to alloc AH: GRH not set");
649 return -EINVAL;
650 }
651
652 ah->rdev = rdev;
653 ah->qplib_ah.pd = &pd->qplib_pd;
654
655 /* Supply the configuration for the HW */
656 memcpy(ah->qplib_ah.dgid.data, grh->dgid.raw,
657 sizeof(union ib_gid));
658 sgid_attr = grh->sgid_attr;
659 /* Get the HW context of the GID. The reference
660 * of GID table entry is already taken by the caller.
661 */
662 ctx = rdma_read_gid_hw_context(sgid_attr);
663 ah->qplib_ah.sgid_index = ctx->idx;
664 ah->qplib_ah.host_sgid_index = grh->sgid_index;
665 ah->qplib_ah.traffic_class = grh->traffic_class;
666 ah->qplib_ah.flow_label = grh->flow_label;
667 ah->qplib_ah.hop_limit = grh->hop_limit;
668 ah->qplib_ah.sl = rdma_ah_get_sl(ah_attr);
669
670 /* Get network header type for this GID */
671 nw_type = rdma_gid_attr_network_type(sgid_attr);
672 ah->qplib_ah.nw_type = bnxt_re_stack_to_dev_nw_type(nw_type);
673
674 memcpy(ah->qplib_ah.dmac, ah_attr->roce.dmac, ETH_ALEN);
675 rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah,
676 !(init_attr->flags &
677 RDMA_CREATE_AH_SLEEPABLE));
678 if (rc) {
679 ibdev_err(&rdev->ibdev, "Failed to allocate HW AH");
680 return rc;
681 }
682
683 /* Write AVID to shared page. */
684 if (udata) {
685 struct bnxt_re_ucontext *uctx = rdma_udata_to_drv_context(
686 udata, struct bnxt_re_ucontext, ib_uctx);
687 unsigned long flag;
688 u32 *wrptr;
689
690 spin_lock_irqsave(&uctx->sh_lock, flag);
691 wrptr = (u32 *)(uctx->shpg + BNXT_RE_AVID_OFFT);
692 *wrptr = ah->qplib_ah.id;
693 wmb(); /* make sure cache is updated. */
694 spin_unlock_irqrestore(&uctx->sh_lock, flag);
695 }
696
697 return 0;
698 }
699
bnxt_re_modify_ah(struct ib_ah * ib_ah,struct rdma_ah_attr * ah_attr)700 int bnxt_re_modify_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
701 {
702 return 0;
703 }
704
bnxt_re_query_ah(struct ib_ah * ib_ah,struct rdma_ah_attr * ah_attr)705 int bnxt_re_query_ah(struct ib_ah *ib_ah, struct rdma_ah_attr *ah_attr)
706 {
707 struct bnxt_re_ah *ah = container_of(ib_ah, struct bnxt_re_ah, ib_ah);
708
709 ah_attr->type = ib_ah->type;
710 rdma_ah_set_sl(ah_attr, ah->qplib_ah.sl);
711 memcpy(ah_attr->roce.dmac, ah->qplib_ah.dmac, ETH_ALEN);
712 rdma_ah_set_grh(ah_attr, NULL, 0,
713 ah->qplib_ah.host_sgid_index,
714 0, ah->qplib_ah.traffic_class);
715 rdma_ah_set_dgid_raw(ah_attr, ah->qplib_ah.dgid.data);
716 rdma_ah_set_port_num(ah_attr, 1);
717 rdma_ah_set_static_rate(ah_attr, 0);
718 return 0;
719 }
720
bnxt_re_lock_cqs(struct bnxt_re_qp * qp)721 unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp)
722 __acquires(&qp->scq->cq_lock) __acquires(&qp->rcq->cq_lock)
723 {
724 unsigned long flags;
725
726 spin_lock_irqsave(&qp->scq->cq_lock, flags);
727 if (qp->rcq != qp->scq)
728 spin_lock(&qp->rcq->cq_lock);
729 else
730 __acquire(&qp->rcq->cq_lock);
731
732 return flags;
733 }
734
bnxt_re_unlock_cqs(struct bnxt_re_qp * qp,unsigned long flags)735 void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp,
736 unsigned long flags)
737 __releases(&qp->scq->cq_lock) __releases(&qp->rcq->cq_lock)
738 {
739 if (qp->rcq != qp->scq)
740 spin_unlock(&qp->rcq->cq_lock);
741 else
742 __release(&qp->rcq->cq_lock);
743 spin_unlock_irqrestore(&qp->scq->cq_lock, flags);
744 }
745
bnxt_re_destroy_gsi_sqp(struct bnxt_re_qp * qp)746 static int bnxt_re_destroy_gsi_sqp(struct bnxt_re_qp *qp)
747 {
748 struct bnxt_re_qp *gsi_sqp;
749 struct bnxt_re_ah *gsi_sah;
750 struct bnxt_re_dev *rdev;
751 int rc = 0;
752
753 rdev = qp->rdev;
754 gsi_sqp = rdev->gsi_ctx.gsi_sqp;
755 gsi_sah = rdev->gsi_ctx.gsi_sah;
756
757 ibdev_dbg(&rdev->ibdev, "Destroy the shadow AH\n");
758 bnxt_qplib_destroy_ah(&rdev->qplib_res,
759 &gsi_sah->qplib_ah,
760 true);
761 bnxt_qplib_clean_qp(&qp->qplib_qp);
762
763 ibdev_dbg(&rdev->ibdev, "Destroy the shadow QP\n");
764 rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &gsi_sqp->qplib_qp);
765 if (rc) {
766 ibdev_err(&rdev->ibdev, "Destroy Shadow QP failed");
767 goto fail;
768 }
769 bnxt_qplib_free_qp_res(&rdev->qplib_res, &gsi_sqp->qplib_qp);
770
771 /* remove from active qp list */
772 mutex_lock(&rdev->qp_lock);
773 list_del(&gsi_sqp->list);
774 mutex_unlock(&rdev->qp_lock);
775 atomic_dec(&rdev->qp_count);
776
777 kfree(rdev->gsi_ctx.sqp_tbl);
778 kfree(gsi_sah);
779 kfree(gsi_sqp);
780 rdev->gsi_ctx.gsi_sqp = NULL;
781 rdev->gsi_ctx.gsi_sah = NULL;
782 rdev->gsi_ctx.sqp_tbl = NULL;
783
784 return 0;
785 fail:
786 return rc;
787 }
788
789 /* Queue Pairs */
bnxt_re_destroy_qp(struct ib_qp * ib_qp,struct ib_udata * udata)790 int bnxt_re_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata)
791 {
792 struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
793 struct bnxt_re_dev *rdev = qp->rdev;
794 unsigned int flags;
795 int rc;
796
797 bnxt_qplib_flush_cqn_wq(&qp->qplib_qp);
798
799 rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
800 if (rc) {
801 ibdev_err(&rdev->ibdev, "Failed to destroy HW QP");
802 return rc;
803 }
804
805 if (rdma_is_kernel_res(&qp->ib_qp.res)) {
806 flags = bnxt_re_lock_cqs(qp);
807 bnxt_qplib_clean_qp(&qp->qplib_qp);
808 bnxt_re_unlock_cqs(qp, flags);
809 }
810
811 bnxt_qplib_free_qp_res(&rdev->qplib_res, &qp->qplib_qp);
812
813 if (ib_qp->qp_type == IB_QPT_GSI && rdev->gsi_ctx.gsi_sqp) {
814 rc = bnxt_re_destroy_gsi_sqp(qp);
815 if (rc)
816 goto sh_fail;
817 }
818
819 mutex_lock(&rdev->qp_lock);
820 list_del(&qp->list);
821 mutex_unlock(&rdev->qp_lock);
822 atomic_dec(&rdev->qp_count);
823
824 ib_umem_release(qp->rumem);
825 ib_umem_release(qp->sumem);
826
827 kfree(qp);
828 return 0;
829 sh_fail:
830 return rc;
831 }
832
__from_ib_qp_type(enum ib_qp_type type)833 static u8 __from_ib_qp_type(enum ib_qp_type type)
834 {
835 switch (type) {
836 case IB_QPT_GSI:
837 return CMDQ_CREATE_QP1_TYPE_GSI;
838 case IB_QPT_RC:
839 return CMDQ_CREATE_QP_TYPE_RC;
840 case IB_QPT_UD:
841 return CMDQ_CREATE_QP_TYPE_UD;
842 default:
843 return IB_QPT_MAX;
844 }
845 }
846
bnxt_re_setup_rwqe_size(struct bnxt_qplib_qp * qplqp,int rsge,int max)847 static u16 bnxt_re_setup_rwqe_size(struct bnxt_qplib_qp *qplqp,
848 int rsge, int max)
849 {
850 if (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
851 rsge = max;
852 return bnxt_re_get_rwqe_size(rsge);
853 }
854
bnxt_re_get_wqe_size(int ilsize,int nsge)855 static u16 bnxt_re_get_wqe_size(int ilsize, int nsge)
856 {
857 u16 wqe_size, calc_ils;
858
859 wqe_size = bnxt_re_get_swqe_size(nsge);
860 if (ilsize) {
861 calc_ils = sizeof(struct sq_send_hdr) + ilsize;
862 wqe_size = max_t(u16, calc_ils, wqe_size);
863 wqe_size = ALIGN(wqe_size, sizeof(struct sq_send_hdr));
864 }
865 return wqe_size;
866 }
867
bnxt_re_setup_swqe_size(struct bnxt_re_qp * qp,struct ib_qp_init_attr * init_attr)868 static int bnxt_re_setup_swqe_size(struct bnxt_re_qp *qp,
869 struct ib_qp_init_attr *init_attr)
870 {
871 struct bnxt_qplib_dev_attr *dev_attr;
872 struct bnxt_qplib_qp *qplqp;
873 struct bnxt_re_dev *rdev;
874 struct bnxt_qplib_q *sq;
875 int align, ilsize;
876
877 rdev = qp->rdev;
878 qplqp = &qp->qplib_qp;
879 sq = &qplqp->sq;
880 dev_attr = &rdev->dev_attr;
881
882 align = sizeof(struct sq_send_hdr);
883 ilsize = ALIGN(init_attr->cap.max_inline_data, align);
884
885 sq->wqe_size = bnxt_re_get_wqe_size(ilsize, sq->max_sge);
886 if (sq->wqe_size > bnxt_re_get_swqe_size(dev_attr->max_qp_sges))
887 return -EINVAL;
888 /* For gen p4 and gen p5 backward compatibility mode
889 * wqe size is fixed to 128 bytes
890 */
891 if (sq->wqe_size < bnxt_re_get_swqe_size(dev_attr->max_qp_sges) &&
892 qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
893 sq->wqe_size = bnxt_re_get_swqe_size(dev_attr->max_qp_sges);
894
895 if (init_attr->cap.max_inline_data) {
896 qplqp->max_inline_data = sq->wqe_size -
897 sizeof(struct sq_send_hdr);
898 init_attr->cap.max_inline_data = qplqp->max_inline_data;
899 if (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
900 sq->max_sge = qplqp->max_inline_data /
901 sizeof(struct sq_sge);
902 }
903
904 return 0;
905 }
906
bnxt_re_init_user_qp(struct bnxt_re_dev * rdev,struct bnxt_re_pd * pd,struct bnxt_re_qp * qp,struct ib_udata * udata)907 static int bnxt_re_init_user_qp(struct bnxt_re_dev *rdev, struct bnxt_re_pd *pd,
908 struct bnxt_re_qp *qp, struct ib_udata *udata)
909 {
910 struct bnxt_qplib_qp *qplib_qp;
911 struct bnxt_re_ucontext *cntx;
912 struct bnxt_re_qp_req ureq;
913 int bytes = 0, psn_sz;
914 struct ib_umem *umem;
915 int psn_nume;
916
917 qplib_qp = &qp->qplib_qp;
918 cntx = rdma_udata_to_drv_context(udata, struct bnxt_re_ucontext,
919 ib_uctx);
920 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
921 return -EFAULT;
922
923 bytes = (qplib_qp->sq.max_wqe * qplib_qp->sq.wqe_size);
924 /* Consider mapping PSN search memory only for RC QPs. */
925 if (qplib_qp->type == CMDQ_CREATE_QP_TYPE_RC) {
926 psn_sz = bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx) ?
927 sizeof(struct sq_psn_search_ext) :
928 sizeof(struct sq_psn_search);
929 psn_nume = (qplib_qp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC) ?
930 qplib_qp->sq.max_wqe :
931 ((qplib_qp->sq.max_wqe * qplib_qp->sq.wqe_size) /
932 sizeof(struct bnxt_qplib_sge));
933 bytes += (psn_nume * psn_sz);
934 }
935
936 bytes = PAGE_ALIGN(bytes);
937 umem = ib_umem_get(&rdev->ibdev, ureq.qpsva, bytes,
938 IB_ACCESS_LOCAL_WRITE);
939 if (IS_ERR(umem))
940 return PTR_ERR(umem);
941
942 qp->sumem = umem;
943 qplib_qp->sq.sg_info.umem = umem;
944 qplib_qp->sq.sg_info.pgsize = PAGE_SIZE;
945 qplib_qp->sq.sg_info.pgshft = PAGE_SHIFT;
946 qplib_qp->qp_handle = ureq.qp_handle;
947
948 if (!qp->qplib_qp.srq) {
949 bytes = (qplib_qp->rq.max_wqe * qplib_qp->rq.wqe_size);
950 bytes = PAGE_ALIGN(bytes);
951 umem = ib_umem_get(&rdev->ibdev, ureq.qprva, bytes,
952 IB_ACCESS_LOCAL_WRITE);
953 if (IS_ERR(umem))
954 goto rqfail;
955 qp->rumem = umem;
956 qplib_qp->rq.sg_info.umem = umem;
957 qplib_qp->rq.sg_info.pgsize = PAGE_SIZE;
958 qplib_qp->rq.sg_info.pgshft = PAGE_SHIFT;
959 }
960
961 qplib_qp->dpi = &cntx->dpi;
962 return 0;
963 rqfail:
964 ib_umem_release(qp->sumem);
965 qp->sumem = NULL;
966 memset(&qplib_qp->sq.sg_info, 0, sizeof(qplib_qp->sq.sg_info));
967
968 return PTR_ERR(umem);
969 }
970
bnxt_re_create_shadow_qp_ah(struct bnxt_re_pd * pd,struct bnxt_qplib_res * qp1_res,struct bnxt_qplib_qp * qp1_qp)971 static struct bnxt_re_ah *bnxt_re_create_shadow_qp_ah
972 (struct bnxt_re_pd *pd,
973 struct bnxt_qplib_res *qp1_res,
974 struct bnxt_qplib_qp *qp1_qp)
975 {
976 struct bnxt_re_dev *rdev = pd->rdev;
977 struct bnxt_re_ah *ah;
978 union ib_gid sgid;
979 int rc;
980
981 ah = kzalloc(sizeof(*ah), GFP_KERNEL);
982 if (!ah)
983 return NULL;
984
985 ah->rdev = rdev;
986 ah->qplib_ah.pd = &pd->qplib_pd;
987
988 rc = bnxt_re_query_gid(&rdev->ibdev, 1, 0, &sgid);
989 if (rc)
990 goto fail;
991
992 /* supply the dgid data same as sgid */
993 memcpy(ah->qplib_ah.dgid.data, &sgid.raw,
994 sizeof(union ib_gid));
995 ah->qplib_ah.sgid_index = 0;
996
997 ah->qplib_ah.traffic_class = 0;
998 ah->qplib_ah.flow_label = 0;
999 ah->qplib_ah.hop_limit = 1;
1000 ah->qplib_ah.sl = 0;
1001 /* Have DMAC same as SMAC */
1002 ether_addr_copy(ah->qplib_ah.dmac, rdev->netdev->dev_addr);
1003
1004 rc = bnxt_qplib_create_ah(&rdev->qplib_res, &ah->qplib_ah, false);
1005 if (rc) {
1006 ibdev_err(&rdev->ibdev,
1007 "Failed to allocate HW AH for Shadow QP");
1008 goto fail;
1009 }
1010
1011 return ah;
1012
1013 fail:
1014 kfree(ah);
1015 return NULL;
1016 }
1017
bnxt_re_create_shadow_qp(struct bnxt_re_pd * pd,struct bnxt_qplib_res * qp1_res,struct bnxt_qplib_qp * qp1_qp)1018 static struct bnxt_re_qp *bnxt_re_create_shadow_qp
1019 (struct bnxt_re_pd *pd,
1020 struct bnxt_qplib_res *qp1_res,
1021 struct bnxt_qplib_qp *qp1_qp)
1022 {
1023 struct bnxt_re_dev *rdev = pd->rdev;
1024 struct bnxt_re_qp *qp;
1025 int rc;
1026
1027 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1028 if (!qp)
1029 return NULL;
1030
1031 qp->rdev = rdev;
1032
1033 /* Initialize the shadow QP structure from the QP1 values */
1034 ether_addr_copy(qp->qplib_qp.smac, rdev->netdev->dev_addr);
1035
1036 qp->qplib_qp.pd = &pd->qplib_pd;
1037 qp->qplib_qp.qp_handle = (u64)(unsigned long)(&qp->qplib_qp);
1038 qp->qplib_qp.type = IB_QPT_UD;
1039
1040 qp->qplib_qp.max_inline_data = 0;
1041 qp->qplib_qp.sig_type = true;
1042
1043 /* Shadow QP SQ depth should be same as QP1 RQ depth */
1044 qp->qplib_qp.sq.wqe_size = bnxt_re_get_wqe_size(0, 6);
1045 qp->qplib_qp.sq.max_wqe = qp1_qp->rq.max_wqe;
1046 qp->qplib_qp.sq.max_sge = 2;
1047 /* Q full delta can be 1 since it is internal QP */
1048 qp->qplib_qp.sq.q_full_delta = 1;
1049 qp->qplib_qp.sq.sg_info.pgsize = PAGE_SIZE;
1050 qp->qplib_qp.sq.sg_info.pgshft = PAGE_SHIFT;
1051
1052 qp->qplib_qp.scq = qp1_qp->scq;
1053 qp->qplib_qp.rcq = qp1_qp->rcq;
1054
1055 qp->qplib_qp.rq.wqe_size = bnxt_re_get_rwqe_size(6);
1056 qp->qplib_qp.rq.max_wqe = qp1_qp->rq.max_wqe;
1057 qp->qplib_qp.rq.max_sge = qp1_qp->rq.max_sge;
1058 /* Q full delta can be 1 since it is internal QP */
1059 qp->qplib_qp.rq.q_full_delta = 1;
1060 qp->qplib_qp.rq.sg_info.pgsize = PAGE_SIZE;
1061 qp->qplib_qp.rq.sg_info.pgshft = PAGE_SHIFT;
1062
1063 qp->qplib_qp.mtu = qp1_qp->mtu;
1064
1065 qp->qplib_qp.sq_hdr_buf_size = 0;
1066 qp->qplib_qp.rq_hdr_buf_size = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
1067 qp->qplib_qp.dpi = &rdev->dpi_privileged;
1068
1069 rc = bnxt_qplib_create_qp(qp1_res, &qp->qplib_qp);
1070 if (rc)
1071 goto fail;
1072
1073 spin_lock_init(&qp->sq_lock);
1074 INIT_LIST_HEAD(&qp->list);
1075 mutex_lock(&rdev->qp_lock);
1076 list_add_tail(&qp->list, &rdev->qp_list);
1077 atomic_inc(&rdev->qp_count);
1078 mutex_unlock(&rdev->qp_lock);
1079 return qp;
1080 fail:
1081 kfree(qp);
1082 return NULL;
1083 }
1084
bnxt_re_init_rq_attr(struct bnxt_re_qp * qp,struct ib_qp_init_attr * init_attr)1085 static int bnxt_re_init_rq_attr(struct bnxt_re_qp *qp,
1086 struct ib_qp_init_attr *init_attr)
1087 {
1088 struct bnxt_qplib_dev_attr *dev_attr;
1089 struct bnxt_qplib_qp *qplqp;
1090 struct bnxt_re_dev *rdev;
1091 struct bnxt_qplib_q *rq;
1092 int entries;
1093
1094 rdev = qp->rdev;
1095 qplqp = &qp->qplib_qp;
1096 rq = &qplqp->rq;
1097 dev_attr = &rdev->dev_attr;
1098
1099 if (init_attr->srq) {
1100 struct bnxt_re_srq *srq;
1101
1102 srq = container_of(init_attr->srq, struct bnxt_re_srq, ib_srq);
1103 if (!srq) {
1104 ibdev_err(&rdev->ibdev, "SRQ not found");
1105 return -EINVAL;
1106 }
1107 qplqp->srq = &srq->qplib_srq;
1108 rq->max_wqe = 0;
1109 } else {
1110 rq->max_sge = init_attr->cap.max_recv_sge;
1111 if (rq->max_sge > dev_attr->max_qp_sges)
1112 rq->max_sge = dev_attr->max_qp_sges;
1113 init_attr->cap.max_recv_sge = rq->max_sge;
1114 rq->wqe_size = bnxt_re_setup_rwqe_size(qplqp, rq->max_sge,
1115 dev_attr->max_qp_sges);
1116 /* Allocate 1 more than what's provided so posting max doesn't
1117 * mean empty.
1118 */
1119 entries = roundup_pow_of_two(init_attr->cap.max_recv_wr + 1);
1120 rq->max_wqe = min_t(u32, entries, dev_attr->max_qp_wqes + 1);
1121 rq->q_full_delta = 0;
1122 rq->sg_info.pgsize = PAGE_SIZE;
1123 rq->sg_info.pgshft = PAGE_SHIFT;
1124 }
1125
1126 return 0;
1127 }
1128
bnxt_re_adjust_gsi_rq_attr(struct bnxt_re_qp * qp)1129 static void bnxt_re_adjust_gsi_rq_attr(struct bnxt_re_qp *qp)
1130 {
1131 struct bnxt_qplib_dev_attr *dev_attr;
1132 struct bnxt_qplib_qp *qplqp;
1133 struct bnxt_re_dev *rdev;
1134
1135 rdev = qp->rdev;
1136 qplqp = &qp->qplib_qp;
1137 dev_attr = &rdev->dev_attr;
1138
1139 if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
1140 qplqp->rq.max_sge = dev_attr->max_qp_sges;
1141 if (qplqp->rq.max_sge > dev_attr->max_qp_sges)
1142 qplqp->rq.max_sge = dev_attr->max_qp_sges;
1143 qplqp->rq.max_sge = 6;
1144 }
1145 }
1146
bnxt_re_init_sq_attr(struct bnxt_re_qp * qp,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)1147 static int bnxt_re_init_sq_attr(struct bnxt_re_qp *qp,
1148 struct ib_qp_init_attr *init_attr,
1149 struct ib_udata *udata)
1150 {
1151 struct bnxt_qplib_dev_attr *dev_attr;
1152 struct bnxt_qplib_qp *qplqp;
1153 struct bnxt_re_dev *rdev;
1154 struct bnxt_qplib_q *sq;
1155 int entries;
1156 int diff;
1157 int rc;
1158
1159 rdev = qp->rdev;
1160 qplqp = &qp->qplib_qp;
1161 sq = &qplqp->sq;
1162 dev_attr = &rdev->dev_attr;
1163
1164 sq->max_sge = init_attr->cap.max_send_sge;
1165 if (sq->max_sge > dev_attr->max_qp_sges) {
1166 sq->max_sge = dev_attr->max_qp_sges;
1167 init_attr->cap.max_send_sge = sq->max_sge;
1168 }
1169
1170 rc = bnxt_re_setup_swqe_size(qp, init_attr);
1171 if (rc)
1172 return rc;
1173
1174 entries = init_attr->cap.max_send_wr;
1175 /* Allocate 128 + 1 more than what's provided */
1176 diff = (qplqp->wqe_mode == BNXT_QPLIB_WQE_MODE_VARIABLE) ?
1177 0 : BNXT_QPLIB_RESERVED_QP_WRS;
1178 entries = roundup_pow_of_two(entries + diff + 1);
1179 sq->max_wqe = min_t(u32, entries, dev_attr->max_qp_wqes + diff + 1);
1180 sq->q_full_delta = diff + 1;
1181 /*
1182 * Reserving one slot for Phantom WQE. Application can
1183 * post one extra entry in this case. But allowing this to avoid
1184 * unexpected Queue full condition
1185 */
1186 qplqp->sq.q_full_delta -= 1;
1187 qplqp->sq.sg_info.pgsize = PAGE_SIZE;
1188 qplqp->sq.sg_info.pgshft = PAGE_SHIFT;
1189
1190 return 0;
1191 }
1192
bnxt_re_adjust_gsi_sq_attr(struct bnxt_re_qp * qp,struct ib_qp_init_attr * init_attr)1193 static void bnxt_re_adjust_gsi_sq_attr(struct bnxt_re_qp *qp,
1194 struct ib_qp_init_attr *init_attr)
1195 {
1196 struct bnxt_qplib_dev_attr *dev_attr;
1197 struct bnxt_qplib_qp *qplqp;
1198 struct bnxt_re_dev *rdev;
1199 int entries;
1200
1201 rdev = qp->rdev;
1202 qplqp = &qp->qplib_qp;
1203 dev_attr = &rdev->dev_attr;
1204
1205 if (!bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx)) {
1206 entries = roundup_pow_of_two(init_attr->cap.max_send_wr + 1);
1207 qplqp->sq.max_wqe = min_t(u32, entries,
1208 dev_attr->max_qp_wqes + 1);
1209 qplqp->sq.q_full_delta = qplqp->sq.max_wqe -
1210 init_attr->cap.max_send_wr;
1211 qplqp->sq.max_sge++; /* Need one extra sge to put UD header */
1212 if (qplqp->sq.max_sge > dev_attr->max_qp_sges)
1213 qplqp->sq.max_sge = dev_attr->max_qp_sges;
1214 }
1215 }
1216
bnxt_re_init_qp_type(struct bnxt_re_dev * rdev,struct ib_qp_init_attr * init_attr)1217 static int bnxt_re_init_qp_type(struct bnxt_re_dev *rdev,
1218 struct ib_qp_init_attr *init_attr)
1219 {
1220 struct bnxt_qplib_chip_ctx *chip_ctx;
1221 int qptype;
1222
1223 chip_ctx = rdev->chip_ctx;
1224
1225 qptype = __from_ib_qp_type(init_attr->qp_type);
1226 if (qptype == IB_QPT_MAX) {
1227 ibdev_err(&rdev->ibdev, "QP type 0x%x not supported", qptype);
1228 qptype = -EOPNOTSUPP;
1229 goto out;
1230 }
1231
1232 if (bnxt_qplib_is_chip_gen_p5(chip_ctx) &&
1233 init_attr->qp_type == IB_QPT_GSI)
1234 qptype = CMDQ_CREATE_QP_TYPE_GSI;
1235 out:
1236 return qptype;
1237 }
1238
bnxt_re_init_qp_attr(struct bnxt_re_qp * qp,struct bnxt_re_pd * pd,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)1239 static int bnxt_re_init_qp_attr(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
1240 struct ib_qp_init_attr *init_attr,
1241 struct ib_udata *udata)
1242 {
1243 struct bnxt_qplib_dev_attr *dev_attr;
1244 struct bnxt_qplib_qp *qplqp;
1245 struct bnxt_re_dev *rdev;
1246 struct bnxt_re_cq *cq;
1247 int rc = 0, qptype;
1248
1249 rdev = qp->rdev;
1250 qplqp = &qp->qplib_qp;
1251 dev_attr = &rdev->dev_attr;
1252
1253 /* Setup misc params */
1254 ether_addr_copy(qplqp->smac, rdev->netdev->dev_addr);
1255 qplqp->pd = &pd->qplib_pd;
1256 qplqp->qp_handle = (u64)qplqp;
1257 qplqp->max_inline_data = init_attr->cap.max_inline_data;
1258 qplqp->sig_type = ((init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ?
1259 true : false);
1260 qptype = bnxt_re_init_qp_type(rdev, init_attr);
1261 if (qptype < 0) {
1262 rc = qptype;
1263 goto out;
1264 }
1265 qplqp->type = (u8)qptype;
1266 qplqp->wqe_mode = rdev->chip_ctx->modes.wqe_mode;
1267
1268 if (init_attr->qp_type == IB_QPT_RC) {
1269 qplqp->max_rd_atomic = dev_attr->max_qp_rd_atom;
1270 qplqp->max_dest_rd_atomic = dev_attr->max_qp_init_rd_atom;
1271 }
1272 qplqp->mtu = ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
1273 qplqp->dpi = &rdev->dpi_privileged; /* Doorbell page */
1274 if (init_attr->create_flags)
1275 ibdev_dbg(&rdev->ibdev,
1276 "QP create flags 0x%x not supported",
1277 init_attr->create_flags);
1278
1279 /* Setup CQs */
1280 if (init_attr->send_cq) {
1281 cq = container_of(init_attr->send_cq, struct bnxt_re_cq, ib_cq);
1282 if (!cq) {
1283 ibdev_err(&rdev->ibdev, "Send CQ not found");
1284 rc = -EINVAL;
1285 goto out;
1286 }
1287 qplqp->scq = &cq->qplib_cq;
1288 qp->scq = cq;
1289 }
1290
1291 if (init_attr->recv_cq) {
1292 cq = container_of(init_attr->recv_cq, struct bnxt_re_cq, ib_cq);
1293 if (!cq) {
1294 ibdev_err(&rdev->ibdev, "Receive CQ not found");
1295 rc = -EINVAL;
1296 goto out;
1297 }
1298 qplqp->rcq = &cq->qplib_cq;
1299 qp->rcq = cq;
1300 }
1301
1302 /* Setup RQ/SRQ */
1303 rc = bnxt_re_init_rq_attr(qp, init_attr);
1304 if (rc)
1305 goto out;
1306 if (init_attr->qp_type == IB_QPT_GSI)
1307 bnxt_re_adjust_gsi_rq_attr(qp);
1308
1309 /* Setup SQ */
1310 rc = bnxt_re_init_sq_attr(qp, init_attr, udata);
1311 if (rc)
1312 goto out;
1313 if (init_attr->qp_type == IB_QPT_GSI)
1314 bnxt_re_adjust_gsi_sq_attr(qp, init_attr);
1315
1316 if (udata) /* This will update DPI and qp_handle */
1317 rc = bnxt_re_init_user_qp(rdev, pd, qp, udata);
1318 out:
1319 return rc;
1320 }
1321
bnxt_re_create_shadow_gsi(struct bnxt_re_qp * qp,struct bnxt_re_pd * pd)1322 static int bnxt_re_create_shadow_gsi(struct bnxt_re_qp *qp,
1323 struct bnxt_re_pd *pd)
1324 {
1325 struct bnxt_re_sqp_entries *sqp_tbl = NULL;
1326 struct bnxt_re_dev *rdev;
1327 struct bnxt_re_qp *sqp;
1328 struct bnxt_re_ah *sah;
1329 int rc = 0;
1330
1331 rdev = qp->rdev;
1332 /* Create a shadow QP to handle the QP1 traffic */
1333 sqp_tbl = kzalloc(sizeof(*sqp_tbl) * BNXT_RE_MAX_GSI_SQP_ENTRIES,
1334 GFP_KERNEL);
1335 if (!sqp_tbl)
1336 return -ENOMEM;
1337 rdev->gsi_ctx.sqp_tbl = sqp_tbl;
1338
1339 sqp = bnxt_re_create_shadow_qp(pd, &rdev->qplib_res, &qp->qplib_qp);
1340 if (!sqp) {
1341 rc = -ENODEV;
1342 ibdev_err(&rdev->ibdev, "Failed to create Shadow QP for QP1");
1343 goto out;
1344 }
1345 rdev->gsi_ctx.gsi_sqp = sqp;
1346
1347 sqp->rcq = qp->rcq;
1348 sqp->scq = qp->scq;
1349 sah = bnxt_re_create_shadow_qp_ah(pd, &rdev->qplib_res,
1350 &qp->qplib_qp);
1351 if (!sah) {
1352 bnxt_qplib_destroy_qp(&rdev->qplib_res,
1353 &sqp->qplib_qp);
1354 rc = -ENODEV;
1355 ibdev_err(&rdev->ibdev,
1356 "Failed to create AH entry for ShadowQP");
1357 goto out;
1358 }
1359 rdev->gsi_ctx.gsi_sah = sah;
1360
1361 return 0;
1362 out:
1363 kfree(sqp_tbl);
1364 return rc;
1365 }
1366
bnxt_re_create_gsi_qp(struct bnxt_re_qp * qp,struct bnxt_re_pd * pd,struct ib_qp_init_attr * init_attr)1367 static int bnxt_re_create_gsi_qp(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
1368 struct ib_qp_init_attr *init_attr)
1369 {
1370 struct bnxt_re_dev *rdev;
1371 struct bnxt_qplib_qp *qplqp;
1372 int rc = 0;
1373
1374 rdev = qp->rdev;
1375 qplqp = &qp->qplib_qp;
1376
1377 qplqp->rq_hdr_buf_size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
1378 qplqp->sq_hdr_buf_size = BNXT_QPLIB_MAX_QP1_SQ_HDR_SIZE_V2;
1379
1380 rc = bnxt_qplib_create_qp1(&rdev->qplib_res, qplqp);
1381 if (rc) {
1382 ibdev_err(&rdev->ibdev, "create HW QP1 failed!");
1383 goto out;
1384 }
1385
1386 rc = bnxt_re_create_shadow_gsi(qp, pd);
1387 out:
1388 return rc;
1389 }
1390
bnxt_re_test_qp_limits(struct bnxt_re_dev * rdev,struct ib_qp_init_attr * init_attr,struct bnxt_qplib_dev_attr * dev_attr)1391 static bool bnxt_re_test_qp_limits(struct bnxt_re_dev *rdev,
1392 struct ib_qp_init_attr *init_attr,
1393 struct bnxt_qplib_dev_attr *dev_attr)
1394 {
1395 bool rc = true;
1396
1397 if (init_attr->cap.max_send_wr > dev_attr->max_qp_wqes ||
1398 init_attr->cap.max_recv_wr > dev_attr->max_qp_wqes ||
1399 init_attr->cap.max_send_sge > dev_attr->max_qp_sges ||
1400 init_attr->cap.max_recv_sge > dev_attr->max_qp_sges ||
1401 init_attr->cap.max_inline_data > dev_attr->max_inline_data) {
1402 ibdev_err(&rdev->ibdev,
1403 "Create QP failed - max exceeded! 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x 0x%x/0x%x",
1404 init_attr->cap.max_send_wr, dev_attr->max_qp_wqes,
1405 init_attr->cap.max_recv_wr, dev_attr->max_qp_wqes,
1406 init_attr->cap.max_send_sge, dev_attr->max_qp_sges,
1407 init_attr->cap.max_recv_sge, dev_attr->max_qp_sges,
1408 init_attr->cap.max_inline_data,
1409 dev_attr->max_inline_data);
1410 rc = false;
1411 }
1412 return rc;
1413 }
1414
bnxt_re_create_qp(struct ib_pd * ib_pd,struct ib_qp_init_attr * qp_init_attr,struct ib_udata * udata)1415 struct ib_qp *bnxt_re_create_qp(struct ib_pd *ib_pd,
1416 struct ib_qp_init_attr *qp_init_attr,
1417 struct ib_udata *udata)
1418 {
1419 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
1420 struct bnxt_re_dev *rdev = pd->rdev;
1421 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
1422 struct bnxt_re_qp *qp;
1423 int rc;
1424
1425 rc = bnxt_re_test_qp_limits(rdev, qp_init_attr, dev_attr);
1426 if (!rc) {
1427 rc = -EINVAL;
1428 goto exit;
1429 }
1430
1431 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1432 if (!qp) {
1433 rc = -ENOMEM;
1434 goto exit;
1435 }
1436 qp->rdev = rdev;
1437 rc = bnxt_re_init_qp_attr(qp, pd, qp_init_attr, udata);
1438 if (rc)
1439 goto fail;
1440
1441 if (qp_init_attr->qp_type == IB_QPT_GSI &&
1442 !(bnxt_qplib_is_chip_gen_p5(rdev->chip_ctx))) {
1443 rc = bnxt_re_create_gsi_qp(qp, pd, qp_init_attr);
1444 if (rc == -ENODEV)
1445 goto qp_destroy;
1446 if (rc)
1447 goto fail;
1448 } else {
1449 rc = bnxt_qplib_create_qp(&rdev->qplib_res, &qp->qplib_qp);
1450 if (rc) {
1451 ibdev_err(&rdev->ibdev, "Failed to create HW QP");
1452 goto free_umem;
1453 }
1454 if (udata) {
1455 struct bnxt_re_qp_resp resp;
1456
1457 resp.qpid = qp->qplib_qp.id;
1458 resp.rsvd = 0;
1459 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
1460 if (rc) {
1461 ibdev_err(&rdev->ibdev, "Failed to copy QP udata");
1462 goto qp_destroy;
1463 }
1464 }
1465 }
1466
1467 qp->ib_qp.qp_num = qp->qplib_qp.id;
1468 if (qp_init_attr->qp_type == IB_QPT_GSI)
1469 rdev->gsi_ctx.gsi_qp = qp;
1470 spin_lock_init(&qp->sq_lock);
1471 spin_lock_init(&qp->rq_lock);
1472 INIT_LIST_HEAD(&qp->list);
1473 mutex_lock(&rdev->qp_lock);
1474 list_add_tail(&qp->list, &rdev->qp_list);
1475 mutex_unlock(&rdev->qp_lock);
1476 atomic_inc(&rdev->qp_count);
1477
1478 return &qp->ib_qp;
1479 qp_destroy:
1480 bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
1481 free_umem:
1482 ib_umem_release(qp->rumem);
1483 ib_umem_release(qp->sumem);
1484 fail:
1485 kfree(qp);
1486 exit:
1487 return ERR_PTR(rc);
1488 }
1489
__from_ib_qp_state(enum ib_qp_state state)1490 static u8 __from_ib_qp_state(enum ib_qp_state state)
1491 {
1492 switch (state) {
1493 case IB_QPS_RESET:
1494 return CMDQ_MODIFY_QP_NEW_STATE_RESET;
1495 case IB_QPS_INIT:
1496 return CMDQ_MODIFY_QP_NEW_STATE_INIT;
1497 case IB_QPS_RTR:
1498 return CMDQ_MODIFY_QP_NEW_STATE_RTR;
1499 case IB_QPS_RTS:
1500 return CMDQ_MODIFY_QP_NEW_STATE_RTS;
1501 case IB_QPS_SQD:
1502 return CMDQ_MODIFY_QP_NEW_STATE_SQD;
1503 case IB_QPS_SQE:
1504 return CMDQ_MODIFY_QP_NEW_STATE_SQE;
1505 case IB_QPS_ERR:
1506 default:
1507 return CMDQ_MODIFY_QP_NEW_STATE_ERR;
1508 }
1509 }
1510
__to_ib_qp_state(u8 state)1511 static enum ib_qp_state __to_ib_qp_state(u8 state)
1512 {
1513 switch (state) {
1514 case CMDQ_MODIFY_QP_NEW_STATE_RESET:
1515 return IB_QPS_RESET;
1516 case CMDQ_MODIFY_QP_NEW_STATE_INIT:
1517 return IB_QPS_INIT;
1518 case CMDQ_MODIFY_QP_NEW_STATE_RTR:
1519 return IB_QPS_RTR;
1520 case CMDQ_MODIFY_QP_NEW_STATE_RTS:
1521 return IB_QPS_RTS;
1522 case CMDQ_MODIFY_QP_NEW_STATE_SQD:
1523 return IB_QPS_SQD;
1524 case CMDQ_MODIFY_QP_NEW_STATE_SQE:
1525 return IB_QPS_SQE;
1526 case CMDQ_MODIFY_QP_NEW_STATE_ERR:
1527 default:
1528 return IB_QPS_ERR;
1529 }
1530 }
1531
__from_ib_mtu(enum ib_mtu mtu)1532 static u32 __from_ib_mtu(enum ib_mtu mtu)
1533 {
1534 switch (mtu) {
1535 case IB_MTU_256:
1536 return CMDQ_MODIFY_QP_PATH_MTU_MTU_256;
1537 case IB_MTU_512:
1538 return CMDQ_MODIFY_QP_PATH_MTU_MTU_512;
1539 case IB_MTU_1024:
1540 return CMDQ_MODIFY_QP_PATH_MTU_MTU_1024;
1541 case IB_MTU_2048:
1542 return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
1543 case IB_MTU_4096:
1544 return CMDQ_MODIFY_QP_PATH_MTU_MTU_4096;
1545 default:
1546 return CMDQ_MODIFY_QP_PATH_MTU_MTU_2048;
1547 }
1548 }
1549
__to_ib_mtu(u32 mtu)1550 static enum ib_mtu __to_ib_mtu(u32 mtu)
1551 {
1552 switch (mtu & CREQ_QUERY_QP_RESP_SB_PATH_MTU_MASK) {
1553 case CMDQ_MODIFY_QP_PATH_MTU_MTU_256:
1554 return IB_MTU_256;
1555 case CMDQ_MODIFY_QP_PATH_MTU_MTU_512:
1556 return IB_MTU_512;
1557 case CMDQ_MODIFY_QP_PATH_MTU_MTU_1024:
1558 return IB_MTU_1024;
1559 case CMDQ_MODIFY_QP_PATH_MTU_MTU_2048:
1560 return IB_MTU_2048;
1561 case CMDQ_MODIFY_QP_PATH_MTU_MTU_4096:
1562 return IB_MTU_4096;
1563 default:
1564 return IB_MTU_2048;
1565 }
1566 }
1567
1568 /* Shared Receive Queues */
bnxt_re_destroy_srq(struct ib_srq * ib_srq,struct ib_udata * udata)1569 int bnxt_re_destroy_srq(struct ib_srq *ib_srq, struct ib_udata *udata)
1570 {
1571 struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1572 ib_srq);
1573 struct bnxt_re_dev *rdev = srq->rdev;
1574 struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
1575 struct bnxt_qplib_nq *nq = NULL;
1576
1577 if (qplib_srq->cq)
1578 nq = qplib_srq->cq->nq;
1579 bnxt_qplib_destroy_srq(&rdev->qplib_res, qplib_srq);
1580 ib_umem_release(srq->umem);
1581 atomic_dec(&rdev->srq_count);
1582 if (nq)
1583 nq->budget--;
1584 return 0;
1585 }
1586
bnxt_re_init_user_srq(struct bnxt_re_dev * rdev,struct bnxt_re_pd * pd,struct bnxt_re_srq * srq,struct ib_udata * udata)1587 static int bnxt_re_init_user_srq(struct bnxt_re_dev *rdev,
1588 struct bnxt_re_pd *pd,
1589 struct bnxt_re_srq *srq,
1590 struct ib_udata *udata)
1591 {
1592 struct bnxt_re_srq_req ureq;
1593 struct bnxt_qplib_srq *qplib_srq = &srq->qplib_srq;
1594 struct ib_umem *umem;
1595 int bytes = 0;
1596 struct bnxt_re_ucontext *cntx = rdma_udata_to_drv_context(
1597 udata, struct bnxt_re_ucontext, ib_uctx);
1598
1599 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1600 return -EFAULT;
1601
1602 bytes = (qplib_srq->max_wqe * qplib_srq->wqe_size);
1603 bytes = PAGE_ALIGN(bytes);
1604 umem = ib_umem_get(&rdev->ibdev, ureq.srqva, bytes,
1605 IB_ACCESS_LOCAL_WRITE);
1606 if (IS_ERR(umem))
1607 return PTR_ERR(umem);
1608
1609 srq->umem = umem;
1610 qplib_srq->sg_info.umem = umem;
1611 qplib_srq->sg_info.pgsize = PAGE_SIZE;
1612 qplib_srq->sg_info.pgshft = PAGE_SHIFT;
1613 qplib_srq->srq_handle = ureq.srq_handle;
1614 qplib_srq->dpi = &cntx->dpi;
1615
1616 return 0;
1617 }
1618
bnxt_re_create_srq(struct ib_srq * ib_srq,struct ib_srq_init_attr * srq_init_attr,struct ib_udata * udata)1619 int bnxt_re_create_srq(struct ib_srq *ib_srq,
1620 struct ib_srq_init_attr *srq_init_attr,
1621 struct ib_udata *udata)
1622 {
1623 struct bnxt_qplib_dev_attr *dev_attr;
1624 struct bnxt_qplib_nq *nq = NULL;
1625 struct bnxt_re_dev *rdev;
1626 struct bnxt_re_srq *srq;
1627 struct bnxt_re_pd *pd;
1628 struct ib_pd *ib_pd;
1629 int rc, entries;
1630
1631 ib_pd = ib_srq->pd;
1632 pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
1633 rdev = pd->rdev;
1634 dev_attr = &rdev->dev_attr;
1635 srq = container_of(ib_srq, struct bnxt_re_srq, ib_srq);
1636
1637 if (srq_init_attr->attr.max_wr >= dev_attr->max_srq_wqes) {
1638 ibdev_err(&rdev->ibdev, "Create CQ failed - max exceeded");
1639 rc = -EINVAL;
1640 goto exit;
1641 }
1642
1643 if (srq_init_attr->srq_type != IB_SRQT_BASIC) {
1644 rc = -EOPNOTSUPP;
1645 goto exit;
1646 }
1647
1648 srq->rdev = rdev;
1649 srq->qplib_srq.pd = &pd->qplib_pd;
1650 srq->qplib_srq.dpi = &rdev->dpi_privileged;
1651 /* Allocate 1 more than what's provided so posting max doesn't
1652 * mean empty
1653 */
1654 entries = roundup_pow_of_two(srq_init_attr->attr.max_wr + 1);
1655 if (entries > dev_attr->max_srq_wqes + 1)
1656 entries = dev_attr->max_srq_wqes + 1;
1657 srq->qplib_srq.max_wqe = entries;
1658
1659 srq->qplib_srq.max_sge = srq_init_attr->attr.max_sge;
1660 srq->qplib_srq.wqe_size =
1661 bnxt_re_get_rwqe_size(srq->qplib_srq.max_sge);
1662 srq->qplib_srq.threshold = srq_init_attr->attr.srq_limit;
1663 srq->srq_limit = srq_init_attr->attr.srq_limit;
1664 srq->qplib_srq.eventq_hw_ring_id = rdev->nq[0].ring_id;
1665 nq = &rdev->nq[0];
1666
1667 if (udata) {
1668 rc = bnxt_re_init_user_srq(rdev, pd, srq, udata);
1669 if (rc)
1670 goto fail;
1671 }
1672
1673 rc = bnxt_qplib_create_srq(&rdev->qplib_res, &srq->qplib_srq);
1674 if (rc) {
1675 ibdev_err(&rdev->ibdev, "Create HW SRQ failed!");
1676 goto fail;
1677 }
1678
1679 if (udata) {
1680 struct bnxt_re_srq_resp resp;
1681
1682 resp.srqid = srq->qplib_srq.id;
1683 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
1684 if (rc) {
1685 ibdev_err(&rdev->ibdev, "SRQ copy to udata failed!");
1686 bnxt_qplib_destroy_srq(&rdev->qplib_res,
1687 &srq->qplib_srq);
1688 goto fail;
1689 }
1690 }
1691 if (nq)
1692 nq->budget++;
1693 atomic_inc(&rdev->srq_count);
1694
1695 return 0;
1696
1697 fail:
1698 ib_umem_release(srq->umem);
1699 exit:
1700 return rc;
1701 }
1702
bnxt_re_modify_srq(struct ib_srq * ib_srq,struct ib_srq_attr * srq_attr,enum ib_srq_attr_mask srq_attr_mask,struct ib_udata * udata)1703 int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
1704 enum ib_srq_attr_mask srq_attr_mask,
1705 struct ib_udata *udata)
1706 {
1707 struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1708 ib_srq);
1709 struct bnxt_re_dev *rdev = srq->rdev;
1710 int rc;
1711
1712 switch (srq_attr_mask) {
1713 case IB_SRQ_MAX_WR:
1714 /* SRQ resize is not supported */
1715 break;
1716 case IB_SRQ_LIMIT:
1717 /* Change the SRQ threshold */
1718 if (srq_attr->srq_limit > srq->qplib_srq.max_wqe)
1719 return -EINVAL;
1720
1721 srq->qplib_srq.threshold = srq_attr->srq_limit;
1722 rc = bnxt_qplib_modify_srq(&rdev->qplib_res, &srq->qplib_srq);
1723 if (rc) {
1724 ibdev_err(&rdev->ibdev, "Modify HW SRQ failed!");
1725 return rc;
1726 }
1727 /* On success, update the shadow */
1728 srq->srq_limit = srq_attr->srq_limit;
1729 /* No need to Build and send response back to udata */
1730 break;
1731 default:
1732 ibdev_err(&rdev->ibdev,
1733 "Unsupported srq_attr_mask 0x%x", srq_attr_mask);
1734 return -EINVAL;
1735 }
1736 return 0;
1737 }
1738
bnxt_re_query_srq(struct ib_srq * ib_srq,struct ib_srq_attr * srq_attr)1739 int bnxt_re_query_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr)
1740 {
1741 struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1742 ib_srq);
1743 struct bnxt_re_srq tsrq;
1744 struct bnxt_re_dev *rdev = srq->rdev;
1745 int rc;
1746
1747 /* Get live SRQ attr */
1748 tsrq.qplib_srq.id = srq->qplib_srq.id;
1749 rc = bnxt_qplib_query_srq(&rdev->qplib_res, &tsrq.qplib_srq);
1750 if (rc) {
1751 ibdev_err(&rdev->ibdev, "Query HW SRQ failed!");
1752 return rc;
1753 }
1754 srq_attr->max_wr = srq->qplib_srq.max_wqe;
1755 srq_attr->max_sge = srq->qplib_srq.max_sge;
1756 srq_attr->srq_limit = tsrq.qplib_srq.threshold;
1757
1758 return 0;
1759 }
1760
bnxt_re_post_srq_recv(struct ib_srq * ib_srq,const struct ib_recv_wr * wr,const struct ib_recv_wr ** bad_wr)1761 int bnxt_re_post_srq_recv(struct ib_srq *ib_srq, const struct ib_recv_wr *wr,
1762 const struct ib_recv_wr **bad_wr)
1763 {
1764 struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
1765 ib_srq);
1766 struct bnxt_qplib_swqe wqe;
1767 unsigned long flags;
1768 int rc = 0;
1769
1770 spin_lock_irqsave(&srq->lock, flags);
1771 while (wr) {
1772 /* Transcribe each ib_recv_wr to qplib_swqe */
1773 wqe.num_sge = wr->num_sge;
1774 bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
1775 wqe.wr_id = wr->wr_id;
1776 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
1777
1778 rc = bnxt_qplib_post_srq_recv(&srq->qplib_srq, &wqe);
1779 if (rc) {
1780 *bad_wr = wr;
1781 break;
1782 }
1783 wr = wr->next;
1784 }
1785 spin_unlock_irqrestore(&srq->lock, flags);
1786
1787 return rc;
1788 }
bnxt_re_modify_shadow_qp(struct bnxt_re_dev * rdev,struct bnxt_re_qp * qp1_qp,int qp_attr_mask)1789 static int bnxt_re_modify_shadow_qp(struct bnxt_re_dev *rdev,
1790 struct bnxt_re_qp *qp1_qp,
1791 int qp_attr_mask)
1792 {
1793 struct bnxt_re_qp *qp = rdev->gsi_ctx.gsi_sqp;
1794 int rc = 0;
1795
1796 if (qp_attr_mask & IB_QP_STATE) {
1797 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
1798 qp->qplib_qp.state = qp1_qp->qplib_qp.state;
1799 }
1800 if (qp_attr_mask & IB_QP_PKEY_INDEX) {
1801 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
1802 qp->qplib_qp.pkey_index = qp1_qp->qplib_qp.pkey_index;
1803 }
1804
1805 if (qp_attr_mask & IB_QP_QKEY) {
1806 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
1807 /* Using a Random QKEY */
1808 qp->qplib_qp.qkey = 0x81818181;
1809 }
1810 if (qp_attr_mask & IB_QP_SQ_PSN) {
1811 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
1812 qp->qplib_qp.sq.psn = qp1_qp->qplib_qp.sq.psn;
1813 }
1814
1815 rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
1816 if (rc)
1817 ibdev_err(&rdev->ibdev, "Failed to modify Shadow QP for QP1");
1818 return rc;
1819 }
1820
bnxt_re_modify_qp(struct ib_qp * ib_qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_udata * udata)1821 int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
1822 int qp_attr_mask, struct ib_udata *udata)
1823 {
1824 struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
1825 struct bnxt_re_dev *rdev = qp->rdev;
1826 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
1827 enum ib_qp_state curr_qp_state, new_qp_state;
1828 int rc, entries;
1829 unsigned int flags;
1830 u8 nw_type;
1831
1832 qp->qplib_qp.modify_flags = 0;
1833 if (qp_attr_mask & IB_QP_STATE) {
1834 curr_qp_state = __to_ib_qp_state(qp->qplib_qp.cur_qp_state);
1835 new_qp_state = qp_attr->qp_state;
1836 if (!ib_modify_qp_is_ok(curr_qp_state, new_qp_state,
1837 ib_qp->qp_type, qp_attr_mask)) {
1838 ibdev_err(&rdev->ibdev,
1839 "Invalid attribute mask: %#x specified ",
1840 qp_attr_mask);
1841 ibdev_err(&rdev->ibdev,
1842 "for qpn: %#x type: %#x",
1843 ib_qp->qp_num, ib_qp->qp_type);
1844 ibdev_err(&rdev->ibdev,
1845 "curr_qp_state=0x%x, new_qp_state=0x%x\n",
1846 curr_qp_state, new_qp_state);
1847 return -EINVAL;
1848 }
1849 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_STATE;
1850 qp->qplib_qp.state = __from_ib_qp_state(qp_attr->qp_state);
1851
1852 if (!qp->sumem &&
1853 qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
1854 ibdev_dbg(&rdev->ibdev,
1855 "Move QP = %p to flush list\n", qp);
1856 flags = bnxt_re_lock_cqs(qp);
1857 bnxt_qplib_add_flush_qp(&qp->qplib_qp);
1858 bnxt_re_unlock_cqs(qp, flags);
1859 }
1860 if (!qp->sumem &&
1861 qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_RESET) {
1862 ibdev_dbg(&rdev->ibdev,
1863 "Move QP = %p out of flush list\n", qp);
1864 flags = bnxt_re_lock_cqs(qp);
1865 bnxt_qplib_clean_qp(&qp->qplib_qp);
1866 bnxt_re_unlock_cqs(qp, flags);
1867 }
1868 }
1869 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
1870 qp->qplib_qp.modify_flags |=
1871 CMDQ_MODIFY_QP_MODIFY_MASK_EN_SQD_ASYNC_NOTIFY;
1872 qp->qplib_qp.en_sqd_async_notify = true;
1873 }
1874 if (qp_attr_mask & IB_QP_ACCESS_FLAGS) {
1875 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_ACCESS;
1876 qp->qplib_qp.access =
1877 __from_ib_access_flags(qp_attr->qp_access_flags);
1878 /* LOCAL_WRITE access must be set to allow RC receive */
1879 qp->qplib_qp.access |= BNXT_QPLIB_ACCESS_LOCAL_WRITE;
1880 /* Temp: Set all params on QP as of now */
1881 qp->qplib_qp.access |= CMDQ_MODIFY_QP_ACCESS_REMOTE_WRITE;
1882 qp->qplib_qp.access |= CMDQ_MODIFY_QP_ACCESS_REMOTE_READ;
1883 }
1884 if (qp_attr_mask & IB_QP_PKEY_INDEX) {
1885 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PKEY;
1886 qp->qplib_qp.pkey_index = qp_attr->pkey_index;
1887 }
1888 if (qp_attr_mask & IB_QP_QKEY) {
1889 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_QKEY;
1890 qp->qplib_qp.qkey = qp_attr->qkey;
1891 }
1892 if (qp_attr_mask & IB_QP_AV) {
1893 const struct ib_global_route *grh =
1894 rdma_ah_read_grh(&qp_attr->ah_attr);
1895 const struct ib_gid_attr *sgid_attr;
1896 struct bnxt_re_gid_ctx *ctx;
1897
1898 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_DGID |
1899 CMDQ_MODIFY_QP_MODIFY_MASK_FLOW_LABEL |
1900 CMDQ_MODIFY_QP_MODIFY_MASK_SGID_INDEX |
1901 CMDQ_MODIFY_QP_MODIFY_MASK_HOP_LIMIT |
1902 CMDQ_MODIFY_QP_MODIFY_MASK_TRAFFIC_CLASS |
1903 CMDQ_MODIFY_QP_MODIFY_MASK_DEST_MAC |
1904 CMDQ_MODIFY_QP_MODIFY_MASK_VLAN_ID;
1905 memcpy(qp->qplib_qp.ah.dgid.data, grh->dgid.raw,
1906 sizeof(qp->qplib_qp.ah.dgid.data));
1907 qp->qplib_qp.ah.flow_label = grh->flow_label;
1908 sgid_attr = grh->sgid_attr;
1909 /* Get the HW context of the GID. The reference
1910 * of GID table entry is already taken by the caller.
1911 */
1912 ctx = rdma_read_gid_hw_context(sgid_attr);
1913 qp->qplib_qp.ah.sgid_index = ctx->idx;
1914 qp->qplib_qp.ah.host_sgid_index = grh->sgid_index;
1915 qp->qplib_qp.ah.hop_limit = grh->hop_limit;
1916 qp->qplib_qp.ah.traffic_class = grh->traffic_class;
1917 qp->qplib_qp.ah.sl = rdma_ah_get_sl(&qp_attr->ah_attr);
1918 ether_addr_copy(qp->qplib_qp.ah.dmac,
1919 qp_attr->ah_attr.roce.dmac);
1920
1921 rc = rdma_read_gid_l2_fields(sgid_attr, NULL,
1922 &qp->qplib_qp.smac[0]);
1923 if (rc)
1924 return rc;
1925
1926 nw_type = rdma_gid_attr_network_type(sgid_attr);
1927 switch (nw_type) {
1928 case RDMA_NETWORK_IPV4:
1929 qp->qplib_qp.nw_type =
1930 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV4;
1931 break;
1932 case RDMA_NETWORK_IPV6:
1933 qp->qplib_qp.nw_type =
1934 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV2_IPV6;
1935 break;
1936 default:
1937 qp->qplib_qp.nw_type =
1938 CMDQ_MODIFY_QP_NETWORK_TYPE_ROCEV1;
1939 break;
1940 }
1941 }
1942
1943 if (qp_attr_mask & IB_QP_PATH_MTU) {
1944 qp->qplib_qp.modify_flags |=
1945 CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
1946 qp->qplib_qp.path_mtu = __from_ib_mtu(qp_attr->path_mtu);
1947 qp->qplib_qp.mtu = ib_mtu_enum_to_int(qp_attr->path_mtu);
1948 } else if (qp_attr->qp_state == IB_QPS_RTR) {
1949 qp->qplib_qp.modify_flags |=
1950 CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
1951 qp->qplib_qp.path_mtu =
1952 __from_ib_mtu(iboe_get_mtu(rdev->netdev->mtu));
1953 qp->qplib_qp.mtu =
1954 ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
1955 }
1956
1957 if (qp_attr_mask & IB_QP_TIMEOUT) {
1958 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_TIMEOUT;
1959 qp->qplib_qp.timeout = qp_attr->timeout;
1960 }
1961 if (qp_attr_mask & IB_QP_RETRY_CNT) {
1962 qp->qplib_qp.modify_flags |=
1963 CMDQ_MODIFY_QP_MODIFY_MASK_RETRY_CNT;
1964 qp->qplib_qp.retry_cnt = qp_attr->retry_cnt;
1965 }
1966 if (qp_attr_mask & IB_QP_RNR_RETRY) {
1967 qp->qplib_qp.modify_flags |=
1968 CMDQ_MODIFY_QP_MODIFY_MASK_RNR_RETRY;
1969 qp->qplib_qp.rnr_retry = qp_attr->rnr_retry;
1970 }
1971 if (qp_attr_mask & IB_QP_MIN_RNR_TIMER) {
1972 qp->qplib_qp.modify_flags |=
1973 CMDQ_MODIFY_QP_MODIFY_MASK_MIN_RNR_TIMER;
1974 qp->qplib_qp.min_rnr_timer = qp_attr->min_rnr_timer;
1975 }
1976 if (qp_attr_mask & IB_QP_RQ_PSN) {
1977 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_RQ_PSN;
1978 qp->qplib_qp.rq.psn = qp_attr->rq_psn;
1979 }
1980 if (qp_attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1981 qp->qplib_qp.modify_flags |=
1982 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_RD_ATOMIC;
1983 /* Cap the max_rd_atomic to device max */
1984 qp->qplib_qp.max_rd_atomic = min_t(u32, qp_attr->max_rd_atomic,
1985 dev_attr->max_qp_rd_atom);
1986 }
1987 if (qp_attr_mask & IB_QP_SQ_PSN) {
1988 qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_SQ_PSN;
1989 qp->qplib_qp.sq.psn = qp_attr->sq_psn;
1990 }
1991 if (qp_attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1992 if (qp_attr->max_dest_rd_atomic >
1993 dev_attr->max_qp_init_rd_atom) {
1994 ibdev_err(&rdev->ibdev,
1995 "max_dest_rd_atomic requested%d is > dev_max%d",
1996 qp_attr->max_dest_rd_atomic,
1997 dev_attr->max_qp_init_rd_atom);
1998 return -EINVAL;
1999 }
2000
2001 qp->qplib_qp.modify_flags |=
2002 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_DEST_RD_ATOMIC;
2003 qp->qplib_qp.max_dest_rd_atomic = qp_attr->max_dest_rd_atomic;
2004 }
2005 if (qp_attr_mask & IB_QP_CAP) {
2006 qp->qplib_qp.modify_flags |=
2007 CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SIZE |
2008 CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SIZE |
2009 CMDQ_MODIFY_QP_MODIFY_MASK_SQ_SGE |
2010 CMDQ_MODIFY_QP_MODIFY_MASK_RQ_SGE |
2011 CMDQ_MODIFY_QP_MODIFY_MASK_MAX_INLINE_DATA;
2012 if ((qp_attr->cap.max_send_wr >= dev_attr->max_qp_wqes) ||
2013 (qp_attr->cap.max_recv_wr >= dev_attr->max_qp_wqes) ||
2014 (qp_attr->cap.max_send_sge >= dev_attr->max_qp_sges) ||
2015 (qp_attr->cap.max_recv_sge >= dev_attr->max_qp_sges) ||
2016 (qp_attr->cap.max_inline_data >=
2017 dev_attr->max_inline_data)) {
2018 ibdev_err(&rdev->ibdev,
2019 "Create QP failed - max exceeded");
2020 return -EINVAL;
2021 }
2022 entries = roundup_pow_of_two(qp_attr->cap.max_send_wr);
2023 qp->qplib_qp.sq.max_wqe = min_t(u32, entries,
2024 dev_attr->max_qp_wqes + 1);
2025 qp->qplib_qp.sq.q_full_delta = qp->qplib_qp.sq.max_wqe -
2026 qp_attr->cap.max_send_wr;
2027 /*
2028 * Reserving one slot for Phantom WQE. Some application can
2029 * post one extra entry in this case. Allowing this to avoid
2030 * unexpected Queue full condition
2031 */
2032 qp->qplib_qp.sq.q_full_delta -= 1;
2033 qp->qplib_qp.sq.max_sge = qp_attr->cap.max_send_sge;
2034 if (qp->qplib_qp.rq.max_wqe) {
2035 entries = roundup_pow_of_two(qp_attr->cap.max_recv_wr);
2036 qp->qplib_qp.rq.max_wqe =
2037 min_t(u32, entries, dev_attr->max_qp_wqes + 1);
2038 qp->qplib_qp.rq.q_full_delta = qp->qplib_qp.rq.max_wqe -
2039 qp_attr->cap.max_recv_wr;
2040 qp->qplib_qp.rq.max_sge = qp_attr->cap.max_recv_sge;
2041 } else {
2042 /* SRQ was used prior, just ignore the RQ caps */
2043 }
2044 }
2045 if (qp_attr_mask & IB_QP_DEST_QPN) {
2046 qp->qplib_qp.modify_flags |=
2047 CMDQ_MODIFY_QP_MODIFY_MASK_DEST_QP_ID;
2048 qp->qplib_qp.dest_qpn = qp_attr->dest_qp_num;
2049 }
2050 rc = bnxt_qplib_modify_qp(&rdev->qplib_res, &qp->qplib_qp);
2051 if (rc) {
2052 ibdev_err(&rdev->ibdev, "Failed to modify HW QP");
2053 return rc;
2054 }
2055 if (ib_qp->qp_type == IB_QPT_GSI && rdev->gsi_ctx.gsi_sqp)
2056 rc = bnxt_re_modify_shadow_qp(rdev, qp, qp_attr_mask);
2057 return rc;
2058 }
2059
bnxt_re_query_qp(struct ib_qp * ib_qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)2060 int bnxt_re_query_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
2061 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
2062 {
2063 struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
2064 struct bnxt_re_dev *rdev = qp->rdev;
2065 struct bnxt_qplib_qp *qplib_qp;
2066 int rc;
2067
2068 qplib_qp = kzalloc(sizeof(*qplib_qp), GFP_KERNEL);
2069 if (!qplib_qp)
2070 return -ENOMEM;
2071
2072 qplib_qp->id = qp->qplib_qp.id;
2073 qplib_qp->ah.host_sgid_index = qp->qplib_qp.ah.host_sgid_index;
2074
2075 rc = bnxt_qplib_query_qp(&rdev->qplib_res, qplib_qp);
2076 if (rc) {
2077 ibdev_err(&rdev->ibdev, "Failed to query HW QP");
2078 goto out;
2079 }
2080 qp_attr->qp_state = __to_ib_qp_state(qplib_qp->state);
2081 qp_attr->en_sqd_async_notify = qplib_qp->en_sqd_async_notify ? 1 : 0;
2082 qp_attr->qp_access_flags = __to_ib_access_flags(qplib_qp->access);
2083 qp_attr->pkey_index = qplib_qp->pkey_index;
2084 qp_attr->qkey = qplib_qp->qkey;
2085 qp_attr->ah_attr.type = RDMA_AH_ATTR_TYPE_ROCE;
2086 rdma_ah_set_grh(&qp_attr->ah_attr, NULL, qplib_qp->ah.flow_label,
2087 qplib_qp->ah.host_sgid_index,
2088 qplib_qp->ah.hop_limit,
2089 qplib_qp->ah.traffic_class);
2090 rdma_ah_set_dgid_raw(&qp_attr->ah_attr, qplib_qp->ah.dgid.data);
2091 rdma_ah_set_sl(&qp_attr->ah_attr, qplib_qp->ah.sl);
2092 ether_addr_copy(qp_attr->ah_attr.roce.dmac, qplib_qp->ah.dmac);
2093 qp_attr->path_mtu = __to_ib_mtu(qplib_qp->path_mtu);
2094 qp_attr->timeout = qplib_qp->timeout;
2095 qp_attr->retry_cnt = qplib_qp->retry_cnt;
2096 qp_attr->rnr_retry = qplib_qp->rnr_retry;
2097 qp_attr->min_rnr_timer = qplib_qp->min_rnr_timer;
2098 qp_attr->rq_psn = qplib_qp->rq.psn;
2099 qp_attr->max_rd_atomic = qplib_qp->max_rd_atomic;
2100 qp_attr->sq_psn = qplib_qp->sq.psn;
2101 qp_attr->max_dest_rd_atomic = qplib_qp->max_dest_rd_atomic;
2102 qp_init_attr->sq_sig_type = qplib_qp->sig_type ? IB_SIGNAL_ALL_WR :
2103 IB_SIGNAL_REQ_WR;
2104 qp_attr->dest_qp_num = qplib_qp->dest_qpn;
2105
2106 qp_attr->cap.max_send_wr = qp->qplib_qp.sq.max_wqe;
2107 qp_attr->cap.max_send_sge = qp->qplib_qp.sq.max_sge;
2108 qp_attr->cap.max_recv_wr = qp->qplib_qp.rq.max_wqe;
2109 qp_attr->cap.max_recv_sge = qp->qplib_qp.rq.max_sge;
2110 qp_attr->cap.max_inline_data = qp->qplib_qp.max_inline_data;
2111 qp_init_attr->cap = qp_attr->cap;
2112
2113 out:
2114 kfree(qplib_qp);
2115 return rc;
2116 }
2117
2118 /* Routine for sending QP1 packets for RoCE V1 an V2
2119 */
bnxt_re_build_qp1_send_v2(struct bnxt_re_qp * qp,const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe,int payload_size)2120 static int bnxt_re_build_qp1_send_v2(struct bnxt_re_qp *qp,
2121 const struct ib_send_wr *wr,
2122 struct bnxt_qplib_swqe *wqe,
2123 int payload_size)
2124 {
2125 struct bnxt_re_ah *ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah,
2126 ib_ah);
2127 struct bnxt_qplib_ah *qplib_ah = &ah->qplib_ah;
2128 const struct ib_gid_attr *sgid_attr = ah->ib_ah.sgid_attr;
2129 struct bnxt_qplib_sge sge;
2130 u8 nw_type;
2131 u16 ether_type;
2132 union ib_gid dgid;
2133 bool is_eth = false;
2134 bool is_vlan = false;
2135 bool is_grh = false;
2136 bool is_udp = false;
2137 u8 ip_version = 0;
2138 u16 vlan_id = 0xFFFF;
2139 void *buf;
2140 int i, rc = 0;
2141
2142 memset(&qp->qp1_hdr, 0, sizeof(qp->qp1_hdr));
2143
2144 rc = rdma_read_gid_l2_fields(sgid_attr, &vlan_id, NULL);
2145 if (rc)
2146 return rc;
2147
2148 /* Get network header type for this GID */
2149 nw_type = rdma_gid_attr_network_type(sgid_attr);
2150 switch (nw_type) {
2151 case RDMA_NETWORK_IPV4:
2152 nw_type = BNXT_RE_ROCEV2_IPV4_PACKET;
2153 break;
2154 case RDMA_NETWORK_IPV6:
2155 nw_type = BNXT_RE_ROCEV2_IPV6_PACKET;
2156 break;
2157 default:
2158 nw_type = BNXT_RE_ROCE_V1_PACKET;
2159 break;
2160 }
2161 memcpy(&dgid.raw, &qplib_ah->dgid, 16);
2162 is_udp = sgid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP;
2163 if (is_udp) {
2164 if (ipv6_addr_v4mapped((struct in6_addr *)&sgid_attr->gid)) {
2165 ip_version = 4;
2166 ether_type = ETH_P_IP;
2167 } else {
2168 ip_version = 6;
2169 ether_type = ETH_P_IPV6;
2170 }
2171 is_grh = false;
2172 } else {
2173 ether_type = ETH_P_IBOE;
2174 is_grh = true;
2175 }
2176
2177 is_eth = true;
2178 is_vlan = (vlan_id && (vlan_id < 0x1000)) ? true : false;
2179
2180 ib_ud_header_init(payload_size, !is_eth, is_eth, is_vlan, is_grh,
2181 ip_version, is_udp, 0, &qp->qp1_hdr);
2182
2183 /* ETH */
2184 ether_addr_copy(qp->qp1_hdr.eth.dmac_h, ah->qplib_ah.dmac);
2185 ether_addr_copy(qp->qp1_hdr.eth.smac_h, qp->qplib_qp.smac);
2186
2187 /* For vlan, check the sgid for vlan existence */
2188
2189 if (!is_vlan) {
2190 qp->qp1_hdr.eth.type = cpu_to_be16(ether_type);
2191 } else {
2192 qp->qp1_hdr.vlan.type = cpu_to_be16(ether_type);
2193 qp->qp1_hdr.vlan.tag = cpu_to_be16(vlan_id);
2194 }
2195
2196 if (is_grh || (ip_version == 6)) {
2197 memcpy(qp->qp1_hdr.grh.source_gid.raw, sgid_attr->gid.raw,
2198 sizeof(sgid_attr->gid));
2199 memcpy(qp->qp1_hdr.grh.destination_gid.raw, qplib_ah->dgid.data,
2200 sizeof(sgid_attr->gid));
2201 qp->qp1_hdr.grh.hop_limit = qplib_ah->hop_limit;
2202 }
2203
2204 if (ip_version == 4) {
2205 qp->qp1_hdr.ip4.tos = 0;
2206 qp->qp1_hdr.ip4.id = 0;
2207 qp->qp1_hdr.ip4.frag_off = htons(IP_DF);
2208 qp->qp1_hdr.ip4.ttl = qplib_ah->hop_limit;
2209
2210 memcpy(&qp->qp1_hdr.ip4.saddr, sgid_attr->gid.raw + 12, 4);
2211 memcpy(&qp->qp1_hdr.ip4.daddr, qplib_ah->dgid.data + 12, 4);
2212 qp->qp1_hdr.ip4.check = ib_ud_ip4_csum(&qp->qp1_hdr);
2213 }
2214
2215 if (is_udp) {
2216 qp->qp1_hdr.udp.dport = htons(ROCE_V2_UDP_DPORT);
2217 qp->qp1_hdr.udp.sport = htons(0x8CD1);
2218 qp->qp1_hdr.udp.csum = 0;
2219 }
2220
2221 /* BTH */
2222 if (wr->opcode == IB_WR_SEND_WITH_IMM) {
2223 qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
2224 qp->qp1_hdr.immediate_present = 1;
2225 } else {
2226 qp->qp1_hdr.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2227 }
2228 if (wr->send_flags & IB_SEND_SOLICITED)
2229 qp->qp1_hdr.bth.solicited_event = 1;
2230 /* pad_count */
2231 qp->qp1_hdr.bth.pad_count = (4 - payload_size) & 3;
2232
2233 /* P_key for QP1 is for all members */
2234 qp->qp1_hdr.bth.pkey = cpu_to_be16(0xFFFF);
2235 qp->qp1_hdr.bth.destination_qpn = IB_QP1;
2236 qp->qp1_hdr.bth.ack_req = 0;
2237 qp->send_psn++;
2238 qp->send_psn &= BTH_PSN_MASK;
2239 qp->qp1_hdr.bth.psn = cpu_to_be32(qp->send_psn);
2240 /* DETH */
2241 /* Use the priviledged Q_Key for QP1 */
2242 qp->qp1_hdr.deth.qkey = cpu_to_be32(IB_QP1_QKEY);
2243 qp->qp1_hdr.deth.source_qpn = IB_QP1;
2244
2245 /* Pack the QP1 to the transmit buffer */
2246 buf = bnxt_qplib_get_qp1_sq_buf(&qp->qplib_qp, &sge);
2247 if (buf) {
2248 ib_ud_header_pack(&qp->qp1_hdr, buf);
2249 for (i = wqe->num_sge; i; i--) {
2250 wqe->sg_list[i].addr = wqe->sg_list[i - 1].addr;
2251 wqe->sg_list[i].lkey = wqe->sg_list[i - 1].lkey;
2252 wqe->sg_list[i].size = wqe->sg_list[i - 1].size;
2253 }
2254
2255 /*
2256 * Max Header buf size for IPV6 RoCE V2 is 86,
2257 * which is same as the QP1 SQ header buffer.
2258 * Header buf size for IPV4 RoCE V2 can be 66.
2259 * ETH(14) + VLAN(4)+ IP(20) + UDP (8) + BTH(20).
2260 * Subtract 20 bytes from QP1 SQ header buf size
2261 */
2262 if (is_udp && ip_version == 4)
2263 sge.size -= 20;
2264 /*
2265 * Max Header buf size for RoCE V1 is 78.
2266 * ETH(14) + VLAN(4) + GRH(40) + BTH(20).
2267 * Subtract 8 bytes from QP1 SQ header buf size
2268 */
2269 if (!is_udp)
2270 sge.size -= 8;
2271
2272 /* Subtract 4 bytes for non vlan packets */
2273 if (!is_vlan)
2274 sge.size -= 4;
2275
2276 wqe->sg_list[0].addr = sge.addr;
2277 wqe->sg_list[0].lkey = sge.lkey;
2278 wqe->sg_list[0].size = sge.size;
2279 wqe->num_sge++;
2280
2281 } else {
2282 ibdev_err(&qp->rdev->ibdev, "QP1 buffer is empty!");
2283 rc = -ENOMEM;
2284 }
2285 return rc;
2286 }
2287
2288 /* For the MAD layer, it only provides the recv SGE the size of
2289 * ib_grh + MAD datagram. No Ethernet headers, Ethertype, BTH, DETH,
2290 * nor RoCE iCRC. The Cu+ solution must provide buffer for the entire
2291 * receive packet (334 bytes) with no VLAN and then copy the GRH
2292 * and the MAD datagram out to the provided SGE.
2293 */
bnxt_re_build_qp1_shadow_qp_recv(struct bnxt_re_qp * qp,const struct ib_recv_wr * wr,struct bnxt_qplib_swqe * wqe,int payload_size)2294 static int bnxt_re_build_qp1_shadow_qp_recv(struct bnxt_re_qp *qp,
2295 const struct ib_recv_wr *wr,
2296 struct bnxt_qplib_swqe *wqe,
2297 int payload_size)
2298 {
2299 struct bnxt_re_sqp_entries *sqp_entry;
2300 struct bnxt_qplib_sge ref, sge;
2301 struct bnxt_re_dev *rdev;
2302 u32 rq_prod_index;
2303
2304 rdev = qp->rdev;
2305
2306 rq_prod_index = bnxt_qplib_get_rq_prod_index(&qp->qplib_qp);
2307
2308 if (!bnxt_qplib_get_qp1_rq_buf(&qp->qplib_qp, &sge))
2309 return -ENOMEM;
2310
2311 /* Create 1 SGE to receive the entire
2312 * ethernet packet
2313 */
2314 /* Save the reference from ULP */
2315 ref.addr = wqe->sg_list[0].addr;
2316 ref.lkey = wqe->sg_list[0].lkey;
2317 ref.size = wqe->sg_list[0].size;
2318
2319 sqp_entry = &rdev->gsi_ctx.sqp_tbl[rq_prod_index];
2320
2321 /* SGE 1 */
2322 wqe->sg_list[0].addr = sge.addr;
2323 wqe->sg_list[0].lkey = sge.lkey;
2324 wqe->sg_list[0].size = BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2;
2325 sge.size -= wqe->sg_list[0].size;
2326
2327 sqp_entry->sge.addr = ref.addr;
2328 sqp_entry->sge.lkey = ref.lkey;
2329 sqp_entry->sge.size = ref.size;
2330 /* Store the wrid for reporting completion */
2331 sqp_entry->wrid = wqe->wr_id;
2332 /* change the wqe->wrid to table index */
2333 wqe->wr_id = rq_prod_index;
2334 return 0;
2335 }
2336
is_ud_qp(struct bnxt_re_qp * qp)2337 static int is_ud_qp(struct bnxt_re_qp *qp)
2338 {
2339 return (qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_UD ||
2340 qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_GSI);
2341 }
2342
bnxt_re_build_send_wqe(struct bnxt_re_qp * qp,const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2343 static int bnxt_re_build_send_wqe(struct bnxt_re_qp *qp,
2344 const struct ib_send_wr *wr,
2345 struct bnxt_qplib_swqe *wqe)
2346 {
2347 struct bnxt_re_ah *ah = NULL;
2348
2349 if (is_ud_qp(qp)) {
2350 ah = container_of(ud_wr(wr)->ah, struct bnxt_re_ah, ib_ah);
2351 wqe->send.q_key = ud_wr(wr)->remote_qkey;
2352 wqe->send.dst_qp = ud_wr(wr)->remote_qpn;
2353 wqe->send.avid = ah->qplib_ah.id;
2354 }
2355 switch (wr->opcode) {
2356 case IB_WR_SEND:
2357 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND;
2358 break;
2359 case IB_WR_SEND_WITH_IMM:
2360 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM;
2361 wqe->send.imm_data = wr->ex.imm_data;
2362 break;
2363 case IB_WR_SEND_WITH_INV:
2364 wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV;
2365 wqe->send.inv_key = wr->ex.invalidate_rkey;
2366 break;
2367 default:
2368 return -EINVAL;
2369 }
2370 if (wr->send_flags & IB_SEND_SIGNALED)
2371 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2372 if (wr->send_flags & IB_SEND_FENCE)
2373 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2374 if (wr->send_flags & IB_SEND_SOLICITED)
2375 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2376 if (wr->send_flags & IB_SEND_INLINE)
2377 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
2378
2379 return 0;
2380 }
2381
bnxt_re_build_rdma_wqe(const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2382 static int bnxt_re_build_rdma_wqe(const struct ib_send_wr *wr,
2383 struct bnxt_qplib_swqe *wqe)
2384 {
2385 switch (wr->opcode) {
2386 case IB_WR_RDMA_WRITE:
2387 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE;
2388 break;
2389 case IB_WR_RDMA_WRITE_WITH_IMM:
2390 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM;
2391 wqe->rdma.imm_data = wr->ex.imm_data;
2392 break;
2393 case IB_WR_RDMA_READ:
2394 wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_READ;
2395 wqe->rdma.inv_key = wr->ex.invalidate_rkey;
2396 break;
2397 default:
2398 return -EINVAL;
2399 }
2400 wqe->rdma.remote_va = rdma_wr(wr)->remote_addr;
2401 wqe->rdma.r_key = rdma_wr(wr)->rkey;
2402 if (wr->send_flags & IB_SEND_SIGNALED)
2403 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2404 if (wr->send_flags & IB_SEND_FENCE)
2405 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2406 if (wr->send_flags & IB_SEND_SOLICITED)
2407 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2408 if (wr->send_flags & IB_SEND_INLINE)
2409 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_INLINE;
2410
2411 return 0;
2412 }
2413
bnxt_re_build_atomic_wqe(const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2414 static int bnxt_re_build_atomic_wqe(const struct ib_send_wr *wr,
2415 struct bnxt_qplib_swqe *wqe)
2416 {
2417 switch (wr->opcode) {
2418 case IB_WR_ATOMIC_CMP_AND_SWP:
2419 wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP;
2420 wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
2421 wqe->atomic.swap_data = atomic_wr(wr)->swap;
2422 break;
2423 case IB_WR_ATOMIC_FETCH_AND_ADD:
2424 wqe->type = BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD;
2425 wqe->atomic.cmp_data = atomic_wr(wr)->compare_add;
2426 break;
2427 default:
2428 return -EINVAL;
2429 }
2430 wqe->atomic.remote_va = atomic_wr(wr)->remote_addr;
2431 wqe->atomic.r_key = atomic_wr(wr)->rkey;
2432 if (wr->send_flags & IB_SEND_SIGNALED)
2433 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2434 if (wr->send_flags & IB_SEND_FENCE)
2435 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2436 if (wr->send_flags & IB_SEND_SOLICITED)
2437 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2438 return 0;
2439 }
2440
bnxt_re_build_inv_wqe(const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2441 static int bnxt_re_build_inv_wqe(const struct ib_send_wr *wr,
2442 struct bnxt_qplib_swqe *wqe)
2443 {
2444 wqe->type = BNXT_QPLIB_SWQE_TYPE_LOCAL_INV;
2445 wqe->local_inv.inv_l_key = wr->ex.invalidate_rkey;
2446
2447 /* Need unconditional fence for local invalidate
2448 * opcode to work as expected.
2449 */
2450 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2451
2452 if (wr->send_flags & IB_SEND_SIGNALED)
2453 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2454 if (wr->send_flags & IB_SEND_SOLICITED)
2455 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT;
2456
2457 return 0;
2458 }
2459
bnxt_re_build_reg_wqe(const struct ib_reg_wr * wr,struct bnxt_qplib_swqe * wqe)2460 static int bnxt_re_build_reg_wqe(const struct ib_reg_wr *wr,
2461 struct bnxt_qplib_swqe *wqe)
2462 {
2463 struct bnxt_re_mr *mr = container_of(wr->mr, struct bnxt_re_mr, ib_mr);
2464 struct bnxt_qplib_frpl *qplib_frpl = &mr->qplib_frpl;
2465 int access = wr->access;
2466
2467 wqe->frmr.pbl_ptr = (__le64 *)qplib_frpl->hwq.pbl_ptr[0];
2468 wqe->frmr.pbl_dma_ptr = qplib_frpl->hwq.pbl_dma_ptr[0];
2469 wqe->frmr.page_list = mr->pages;
2470 wqe->frmr.page_list_len = mr->npages;
2471 wqe->frmr.levels = qplib_frpl->hwq.level;
2472 wqe->type = BNXT_QPLIB_SWQE_TYPE_REG_MR;
2473
2474 /* Need unconditional fence for reg_mr
2475 * opcode to function as expected.
2476 */
2477
2478 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_UC_FENCE;
2479
2480 if (wr->wr.send_flags & IB_SEND_SIGNALED)
2481 wqe->flags |= BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP;
2482
2483 if (access & IB_ACCESS_LOCAL_WRITE)
2484 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_LOCAL_WRITE;
2485 if (access & IB_ACCESS_REMOTE_READ)
2486 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_READ;
2487 if (access & IB_ACCESS_REMOTE_WRITE)
2488 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_WRITE;
2489 if (access & IB_ACCESS_REMOTE_ATOMIC)
2490 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_REMOTE_ATOMIC;
2491 if (access & IB_ACCESS_MW_BIND)
2492 wqe->frmr.access_cntl |= SQ_FR_PMR_ACCESS_CNTL_WINDOW_BIND;
2493
2494 wqe->frmr.l_key = wr->key;
2495 wqe->frmr.length = wr->mr->length;
2496 wqe->frmr.pbl_pg_sz_log = (wr->mr->page_size >> PAGE_SHIFT_4K) - 1;
2497 wqe->frmr.va = wr->mr->iova;
2498 return 0;
2499 }
2500
bnxt_re_copy_inline_data(struct bnxt_re_dev * rdev,const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2501 static int bnxt_re_copy_inline_data(struct bnxt_re_dev *rdev,
2502 const struct ib_send_wr *wr,
2503 struct bnxt_qplib_swqe *wqe)
2504 {
2505 /* Copy the inline data to the data field */
2506 u8 *in_data;
2507 u32 i, sge_len;
2508 void *sge_addr;
2509
2510 in_data = wqe->inline_data;
2511 for (i = 0; i < wr->num_sge; i++) {
2512 sge_addr = (void *)(unsigned long)
2513 wr->sg_list[i].addr;
2514 sge_len = wr->sg_list[i].length;
2515
2516 if ((sge_len + wqe->inline_len) >
2517 BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH) {
2518 ibdev_err(&rdev->ibdev,
2519 "Inline data size requested > supported value");
2520 return -EINVAL;
2521 }
2522 sge_len = wr->sg_list[i].length;
2523
2524 memcpy(in_data, sge_addr, sge_len);
2525 in_data += wr->sg_list[i].length;
2526 wqe->inline_len += wr->sg_list[i].length;
2527 }
2528 return wqe->inline_len;
2529 }
2530
bnxt_re_copy_wr_payload(struct bnxt_re_dev * rdev,const struct ib_send_wr * wr,struct bnxt_qplib_swqe * wqe)2531 static int bnxt_re_copy_wr_payload(struct bnxt_re_dev *rdev,
2532 const struct ib_send_wr *wr,
2533 struct bnxt_qplib_swqe *wqe)
2534 {
2535 int payload_sz = 0;
2536
2537 if (wr->send_flags & IB_SEND_INLINE)
2538 payload_sz = bnxt_re_copy_inline_data(rdev, wr, wqe);
2539 else
2540 payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe->sg_list,
2541 wqe->num_sge);
2542
2543 return payload_sz;
2544 }
2545
bnxt_ud_qp_hw_stall_workaround(struct bnxt_re_qp * qp)2546 static void bnxt_ud_qp_hw_stall_workaround(struct bnxt_re_qp *qp)
2547 {
2548 if ((qp->ib_qp.qp_type == IB_QPT_UD ||
2549 qp->ib_qp.qp_type == IB_QPT_GSI ||
2550 qp->ib_qp.qp_type == IB_QPT_RAW_ETHERTYPE) &&
2551 qp->qplib_qp.wqe_cnt == BNXT_RE_UD_QP_HW_STALL) {
2552 int qp_attr_mask;
2553 struct ib_qp_attr qp_attr;
2554
2555 qp_attr_mask = IB_QP_STATE;
2556 qp_attr.qp_state = IB_QPS_RTS;
2557 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, qp_attr_mask, NULL);
2558 qp->qplib_qp.wqe_cnt = 0;
2559 }
2560 }
2561
bnxt_re_post_send_shadow_qp(struct bnxt_re_dev * rdev,struct bnxt_re_qp * qp,const struct ib_send_wr * wr)2562 static int bnxt_re_post_send_shadow_qp(struct bnxt_re_dev *rdev,
2563 struct bnxt_re_qp *qp,
2564 const struct ib_send_wr *wr)
2565 {
2566 int rc = 0, payload_sz = 0;
2567 unsigned long flags;
2568
2569 spin_lock_irqsave(&qp->sq_lock, flags);
2570 while (wr) {
2571 struct bnxt_qplib_swqe wqe = {};
2572
2573 /* Common */
2574 wqe.num_sge = wr->num_sge;
2575 if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
2576 ibdev_err(&rdev->ibdev,
2577 "Limit exceeded for Send SGEs");
2578 rc = -EINVAL;
2579 goto bad;
2580 }
2581
2582 payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
2583 if (payload_sz < 0) {
2584 rc = -EINVAL;
2585 goto bad;
2586 }
2587 wqe.wr_id = wr->wr_id;
2588
2589 wqe.type = BNXT_QPLIB_SWQE_TYPE_SEND;
2590
2591 rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
2592 if (!rc)
2593 rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
2594 bad:
2595 if (rc) {
2596 ibdev_err(&rdev->ibdev,
2597 "Post send failed opcode = %#x rc = %d",
2598 wr->opcode, rc);
2599 break;
2600 }
2601 wr = wr->next;
2602 }
2603 bnxt_qplib_post_send_db(&qp->qplib_qp);
2604 bnxt_ud_qp_hw_stall_workaround(qp);
2605 spin_unlock_irqrestore(&qp->sq_lock, flags);
2606 return rc;
2607 }
2608
bnxt_re_post_send(struct ib_qp * ib_qp,const struct ib_send_wr * wr,const struct ib_send_wr ** bad_wr)2609 int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
2610 const struct ib_send_wr **bad_wr)
2611 {
2612 struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
2613 struct bnxt_qplib_swqe wqe;
2614 int rc = 0, payload_sz = 0;
2615 unsigned long flags;
2616
2617 spin_lock_irqsave(&qp->sq_lock, flags);
2618 while (wr) {
2619 /* House keeping */
2620 memset(&wqe, 0, sizeof(wqe));
2621
2622 /* Common */
2623 wqe.num_sge = wr->num_sge;
2624 if (wr->num_sge > qp->qplib_qp.sq.max_sge) {
2625 ibdev_err(&qp->rdev->ibdev,
2626 "Limit exceeded for Send SGEs");
2627 rc = -EINVAL;
2628 goto bad;
2629 }
2630
2631 payload_sz = bnxt_re_copy_wr_payload(qp->rdev, wr, &wqe);
2632 if (payload_sz < 0) {
2633 rc = -EINVAL;
2634 goto bad;
2635 }
2636 wqe.wr_id = wr->wr_id;
2637
2638 switch (wr->opcode) {
2639 case IB_WR_SEND:
2640 case IB_WR_SEND_WITH_IMM:
2641 if (qp->qplib_qp.type == CMDQ_CREATE_QP1_TYPE_GSI) {
2642 rc = bnxt_re_build_qp1_send_v2(qp, wr, &wqe,
2643 payload_sz);
2644 if (rc)
2645 goto bad;
2646 wqe.rawqp1.lflags |=
2647 SQ_SEND_RAWETH_QP1_LFLAGS_ROCE_CRC;
2648 }
2649 switch (wr->send_flags) {
2650 case IB_SEND_IP_CSUM:
2651 wqe.rawqp1.lflags |=
2652 SQ_SEND_RAWETH_QP1_LFLAGS_IP_CHKSUM;
2653 break;
2654 default:
2655 break;
2656 }
2657 fallthrough;
2658 case IB_WR_SEND_WITH_INV:
2659 rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
2660 break;
2661 case IB_WR_RDMA_WRITE:
2662 case IB_WR_RDMA_WRITE_WITH_IMM:
2663 case IB_WR_RDMA_READ:
2664 rc = bnxt_re_build_rdma_wqe(wr, &wqe);
2665 break;
2666 case IB_WR_ATOMIC_CMP_AND_SWP:
2667 case IB_WR_ATOMIC_FETCH_AND_ADD:
2668 rc = bnxt_re_build_atomic_wqe(wr, &wqe);
2669 break;
2670 case IB_WR_RDMA_READ_WITH_INV:
2671 ibdev_err(&qp->rdev->ibdev,
2672 "RDMA Read with Invalidate is not supported");
2673 rc = -EINVAL;
2674 goto bad;
2675 case IB_WR_LOCAL_INV:
2676 rc = bnxt_re_build_inv_wqe(wr, &wqe);
2677 break;
2678 case IB_WR_REG_MR:
2679 rc = bnxt_re_build_reg_wqe(reg_wr(wr), &wqe);
2680 break;
2681 default:
2682 /* Unsupported WRs */
2683 ibdev_err(&qp->rdev->ibdev,
2684 "WR (%#x) is not supported", wr->opcode);
2685 rc = -EINVAL;
2686 goto bad;
2687 }
2688 if (!rc)
2689 rc = bnxt_qplib_post_send(&qp->qplib_qp, &wqe);
2690 bad:
2691 if (rc) {
2692 ibdev_err(&qp->rdev->ibdev,
2693 "post_send failed op:%#x qps = %#x rc = %d\n",
2694 wr->opcode, qp->qplib_qp.state, rc);
2695 *bad_wr = wr;
2696 break;
2697 }
2698 wr = wr->next;
2699 }
2700 bnxt_qplib_post_send_db(&qp->qplib_qp);
2701 bnxt_ud_qp_hw_stall_workaround(qp);
2702 spin_unlock_irqrestore(&qp->sq_lock, flags);
2703
2704 return rc;
2705 }
2706
bnxt_re_post_recv_shadow_qp(struct bnxt_re_dev * rdev,struct bnxt_re_qp * qp,const struct ib_recv_wr * wr)2707 static int bnxt_re_post_recv_shadow_qp(struct bnxt_re_dev *rdev,
2708 struct bnxt_re_qp *qp,
2709 const struct ib_recv_wr *wr)
2710 {
2711 struct bnxt_qplib_swqe wqe;
2712 int rc = 0;
2713
2714 memset(&wqe, 0, sizeof(wqe));
2715 while (wr) {
2716 /* House keeping */
2717 memset(&wqe, 0, sizeof(wqe));
2718
2719 /* Common */
2720 wqe.num_sge = wr->num_sge;
2721 if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
2722 ibdev_err(&rdev->ibdev,
2723 "Limit exceeded for Receive SGEs");
2724 rc = -EINVAL;
2725 break;
2726 }
2727 bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
2728 wqe.wr_id = wr->wr_id;
2729 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
2730
2731 rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
2732 if (rc)
2733 break;
2734
2735 wr = wr->next;
2736 }
2737 if (!rc)
2738 bnxt_qplib_post_recv_db(&qp->qplib_qp);
2739 return rc;
2740 }
2741
bnxt_re_post_recv(struct ib_qp * ib_qp,const struct ib_recv_wr * wr,const struct ib_recv_wr ** bad_wr)2742 int bnxt_re_post_recv(struct ib_qp *ib_qp, const struct ib_recv_wr *wr,
2743 const struct ib_recv_wr **bad_wr)
2744 {
2745 struct bnxt_re_qp *qp = container_of(ib_qp, struct bnxt_re_qp, ib_qp);
2746 struct bnxt_qplib_swqe wqe;
2747 int rc = 0, payload_sz = 0;
2748 unsigned long flags;
2749 u32 count = 0;
2750
2751 spin_lock_irqsave(&qp->rq_lock, flags);
2752 while (wr) {
2753 /* House keeping */
2754 memset(&wqe, 0, sizeof(wqe));
2755
2756 /* Common */
2757 wqe.num_sge = wr->num_sge;
2758 if (wr->num_sge > qp->qplib_qp.rq.max_sge) {
2759 ibdev_err(&qp->rdev->ibdev,
2760 "Limit exceeded for Receive SGEs");
2761 rc = -EINVAL;
2762 *bad_wr = wr;
2763 break;
2764 }
2765
2766 payload_sz = bnxt_re_build_sgl(wr->sg_list, wqe.sg_list,
2767 wr->num_sge);
2768 wqe.wr_id = wr->wr_id;
2769 wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
2770
2771 if (ib_qp->qp_type == IB_QPT_GSI &&
2772 qp->qplib_qp.type != CMDQ_CREATE_QP_TYPE_GSI)
2773 rc = bnxt_re_build_qp1_shadow_qp_recv(qp, wr, &wqe,
2774 payload_sz);
2775 if (!rc)
2776 rc = bnxt_qplib_post_recv(&qp->qplib_qp, &wqe);
2777 if (rc) {
2778 *bad_wr = wr;
2779 break;
2780 }
2781
2782 /* Ring DB if the RQEs posted reaches a threshold value */
2783 if (++count >= BNXT_RE_RQ_WQE_THRESHOLD) {
2784 bnxt_qplib_post_recv_db(&qp->qplib_qp);
2785 count = 0;
2786 }
2787
2788 wr = wr->next;
2789 }
2790
2791 if (count)
2792 bnxt_qplib_post_recv_db(&qp->qplib_qp);
2793
2794 spin_unlock_irqrestore(&qp->rq_lock, flags);
2795
2796 return rc;
2797 }
2798
2799 /* Completion Queues */
bnxt_re_destroy_cq(struct ib_cq * ib_cq,struct ib_udata * udata)2800 int bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
2801 {
2802 struct bnxt_re_cq *cq;
2803 struct bnxt_qplib_nq *nq;
2804 struct bnxt_re_dev *rdev;
2805
2806 cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
2807 rdev = cq->rdev;
2808 nq = cq->qplib_cq.nq;
2809
2810 bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
2811 ib_umem_release(cq->umem);
2812
2813 atomic_dec(&rdev->cq_count);
2814 nq->budget--;
2815 kfree(cq->cql);
2816 return 0;
2817 }
2818
bnxt_re_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_udata * udata)2819 int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
2820 struct ib_udata *udata)
2821 {
2822 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibcq->device, ibdev);
2823 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
2824 struct bnxt_re_cq *cq = container_of(ibcq, struct bnxt_re_cq, ib_cq);
2825 int rc, entries;
2826 int cqe = attr->cqe;
2827 struct bnxt_qplib_nq *nq = NULL;
2828 unsigned int nq_alloc_cnt;
2829
2830 /* Validate CQ fields */
2831 if (cqe < 1 || cqe > dev_attr->max_cq_wqes) {
2832 ibdev_err(&rdev->ibdev, "Failed to create CQ -max exceeded");
2833 return -EINVAL;
2834 }
2835
2836 cq->rdev = rdev;
2837 cq->qplib_cq.cq_handle = (u64)(unsigned long)(&cq->qplib_cq);
2838
2839 entries = roundup_pow_of_two(cqe + 1);
2840 if (entries > dev_attr->max_cq_wqes + 1)
2841 entries = dev_attr->max_cq_wqes + 1;
2842
2843 cq->qplib_cq.sg_info.pgsize = PAGE_SIZE;
2844 cq->qplib_cq.sg_info.pgshft = PAGE_SHIFT;
2845 if (udata) {
2846 struct bnxt_re_cq_req req;
2847 struct bnxt_re_ucontext *uctx = rdma_udata_to_drv_context(
2848 udata, struct bnxt_re_ucontext, ib_uctx);
2849 if (ib_copy_from_udata(&req, udata, sizeof(req))) {
2850 rc = -EFAULT;
2851 goto fail;
2852 }
2853
2854 cq->umem = ib_umem_get(&rdev->ibdev, req.cq_va,
2855 entries * sizeof(struct cq_base),
2856 IB_ACCESS_LOCAL_WRITE);
2857 if (IS_ERR(cq->umem)) {
2858 rc = PTR_ERR(cq->umem);
2859 goto fail;
2860 }
2861 cq->qplib_cq.sg_info.umem = cq->umem;
2862 cq->qplib_cq.dpi = &uctx->dpi;
2863 } else {
2864 cq->max_cql = min_t(u32, entries, MAX_CQL_PER_POLL);
2865 cq->cql = kcalloc(cq->max_cql, sizeof(struct bnxt_qplib_cqe),
2866 GFP_KERNEL);
2867 if (!cq->cql) {
2868 rc = -ENOMEM;
2869 goto fail;
2870 }
2871
2872 cq->qplib_cq.dpi = &rdev->dpi_privileged;
2873 }
2874 /*
2875 * Allocating the NQ in a round robin fashion. nq_alloc_cnt is a
2876 * used for getting the NQ index.
2877 */
2878 nq_alloc_cnt = atomic_inc_return(&rdev->nq_alloc_cnt);
2879 nq = &rdev->nq[nq_alloc_cnt % (rdev->num_msix - 1)];
2880 cq->qplib_cq.max_wqe = entries;
2881 cq->qplib_cq.cnq_hw_ring_id = nq->ring_id;
2882 cq->qplib_cq.nq = nq;
2883
2884 rc = bnxt_qplib_create_cq(&rdev->qplib_res, &cq->qplib_cq);
2885 if (rc) {
2886 ibdev_err(&rdev->ibdev, "Failed to create HW CQ");
2887 goto fail;
2888 }
2889
2890 cq->ib_cq.cqe = entries;
2891 cq->cq_period = cq->qplib_cq.period;
2892 nq->budget++;
2893
2894 atomic_inc(&rdev->cq_count);
2895 spin_lock_init(&cq->cq_lock);
2896
2897 if (udata) {
2898 struct bnxt_re_cq_resp resp;
2899
2900 resp.cqid = cq->qplib_cq.id;
2901 resp.tail = cq->qplib_cq.hwq.cons;
2902 resp.phase = cq->qplib_cq.period;
2903 resp.rsvd = 0;
2904 rc = ib_copy_to_udata(udata, &resp, sizeof(resp));
2905 if (rc) {
2906 ibdev_err(&rdev->ibdev, "Failed to copy CQ udata");
2907 bnxt_qplib_destroy_cq(&rdev->qplib_res, &cq->qplib_cq);
2908 goto c2fail;
2909 }
2910 }
2911
2912 return 0;
2913
2914 c2fail:
2915 ib_umem_release(cq->umem);
2916 fail:
2917 kfree(cq->cql);
2918 return rc;
2919 }
2920
__req_to_ib_wc_status(u8 qstatus)2921 static u8 __req_to_ib_wc_status(u8 qstatus)
2922 {
2923 switch (qstatus) {
2924 case CQ_REQ_STATUS_OK:
2925 return IB_WC_SUCCESS;
2926 case CQ_REQ_STATUS_BAD_RESPONSE_ERR:
2927 return IB_WC_BAD_RESP_ERR;
2928 case CQ_REQ_STATUS_LOCAL_LENGTH_ERR:
2929 return IB_WC_LOC_LEN_ERR;
2930 case CQ_REQ_STATUS_LOCAL_QP_OPERATION_ERR:
2931 return IB_WC_LOC_QP_OP_ERR;
2932 case CQ_REQ_STATUS_LOCAL_PROTECTION_ERR:
2933 return IB_WC_LOC_PROT_ERR;
2934 case CQ_REQ_STATUS_MEMORY_MGT_OPERATION_ERR:
2935 return IB_WC_GENERAL_ERR;
2936 case CQ_REQ_STATUS_REMOTE_INVALID_REQUEST_ERR:
2937 return IB_WC_REM_INV_REQ_ERR;
2938 case CQ_REQ_STATUS_REMOTE_ACCESS_ERR:
2939 return IB_WC_REM_ACCESS_ERR;
2940 case CQ_REQ_STATUS_REMOTE_OPERATION_ERR:
2941 return IB_WC_REM_OP_ERR;
2942 case CQ_REQ_STATUS_RNR_NAK_RETRY_CNT_ERR:
2943 return IB_WC_RNR_RETRY_EXC_ERR;
2944 case CQ_REQ_STATUS_TRANSPORT_RETRY_CNT_ERR:
2945 return IB_WC_RETRY_EXC_ERR;
2946 case CQ_REQ_STATUS_WORK_REQUEST_FLUSHED_ERR:
2947 return IB_WC_WR_FLUSH_ERR;
2948 default:
2949 return IB_WC_GENERAL_ERR;
2950 }
2951 return 0;
2952 }
2953
__rawqp1_to_ib_wc_status(u8 qstatus)2954 static u8 __rawqp1_to_ib_wc_status(u8 qstatus)
2955 {
2956 switch (qstatus) {
2957 case CQ_RES_RAWETH_QP1_STATUS_OK:
2958 return IB_WC_SUCCESS;
2959 case CQ_RES_RAWETH_QP1_STATUS_LOCAL_ACCESS_ERROR:
2960 return IB_WC_LOC_ACCESS_ERR;
2961 case CQ_RES_RAWETH_QP1_STATUS_HW_LOCAL_LENGTH_ERR:
2962 return IB_WC_LOC_LEN_ERR;
2963 case CQ_RES_RAWETH_QP1_STATUS_LOCAL_PROTECTION_ERR:
2964 return IB_WC_LOC_PROT_ERR;
2965 case CQ_RES_RAWETH_QP1_STATUS_LOCAL_QP_OPERATION_ERR:
2966 return IB_WC_LOC_QP_OP_ERR;
2967 case CQ_RES_RAWETH_QP1_STATUS_MEMORY_MGT_OPERATION_ERR:
2968 return IB_WC_GENERAL_ERR;
2969 case CQ_RES_RAWETH_QP1_STATUS_WORK_REQUEST_FLUSHED_ERR:
2970 return IB_WC_WR_FLUSH_ERR;
2971 case CQ_RES_RAWETH_QP1_STATUS_HW_FLUSH_ERR:
2972 return IB_WC_WR_FLUSH_ERR;
2973 default:
2974 return IB_WC_GENERAL_ERR;
2975 }
2976 }
2977
__rc_to_ib_wc_status(u8 qstatus)2978 static u8 __rc_to_ib_wc_status(u8 qstatus)
2979 {
2980 switch (qstatus) {
2981 case CQ_RES_RC_STATUS_OK:
2982 return IB_WC_SUCCESS;
2983 case CQ_RES_RC_STATUS_LOCAL_ACCESS_ERROR:
2984 return IB_WC_LOC_ACCESS_ERR;
2985 case CQ_RES_RC_STATUS_LOCAL_LENGTH_ERR:
2986 return IB_WC_LOC_LEN_ERR;
2987 case CQ_RES_RC_STATUS_LOCAL_PROTECTION_ERR:
2988 return IB_WC_LOC_PROT_ERR;
2989 case CQ_RES_RC_STATUS_LOCAL_QP_OPERATION_ERR:
2990 return IB_WC_LOC_QP_OP_ERR;
2991 case CQ_RES_RC_STATUS_MEMORY_MGT_OPERATION_ERR:
2992 return IB_WC_GENERAL_ERR;
2993 case CQ_RES_RC_STATUS_REMOTE_INVALID_REQUEST_ERR:
2994 return IB_WC_REM_INV_REQ_ERR;
2995 case CQ_RES_RC_STATUS_WORK_REQUEST_FLUSHED_ERR:
2996 return IB_WC_WR_FLUSH_ERR;
2997 case CQ_RES_RC_STATUS_HW_FLUSH_ERR:
2998 return IB_WC_WR_FLUSH_ERR;
2999 default:
3000 return IB_WC_GENERAL_ERR;
3001 }
3002 }
3003
bnxt_re_process_req_wc(struct ib_wc * wc,struct bnxt_qplib_cqe * cqe)3004 static void bnxt_re_process_req_wc(struct ib_wc *wc, struct bnxt_qplib_cqe *cqe)
3005 {
3006 switch (cqe->type) {
3007 case BNXT_QPLIB_SWQE_TYPE_SEND:
3008 wc->opcode = IB_WC_SEND;
3009 break;
3010 case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM:
3011 wc->opcode = IB_WC_SEND;
3012 wc->wc_flags |= IB_WC_WITH_IMM;
3013 break;
3014 case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV:
3015 wc->opcode = IB_WC_SEND;
3016 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
3017 break;
3018 case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE:
3019 wc->opcode = IB_WC_RDMA_WRITE;
3020 break;
3021 case BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM:
3022 wc->opcode = IB_WC_RDMA_WRITE;
3023 wc->wc_flags |= IB_WC_WITH_IMM;
3024 break;
3025 case BNXT_QPLIB_SWQE_TYPE_RDMA_READ:
3026 wc->opcode = IB_WC_RDMA_READ;
3027 break;
3028 case BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP:
3029 wc->opcode = IB_WC_COMP_SWAP;
3030 break;
3031 case BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD:
3032 wc->opcode = IB_WC_FETCH_ADD;
3033 break;
3034 case BNXT_QPLIB_SWQE_TYPE_LOCAL_INV:
3035 wc->opcode = IB_WC_LOCAL_INV;
3036 break;
3037 case BNXT_QPLIB_SWQE_TYPE_REG_MR:
3038 wc->opcode = IB_WC_REG_MR;
3039 break;
3040 default:
3041 wc->opcode = IB_WC_SEND;
3042 break;
3043 }
3044
3045 wc->status = __req_to_ib_wc_status(cqe->status);
3046 }
3047
bnxt_re_check_packet_type(u16 raweth_qp1_flags,u16 raweth_qp1_flags2)3048 static int bnxt_re_check_packet_type(u16 raweth_qp1_flags,
3049 u16 raweth_qp1_flags2)
3050 {
3051 bool is_ipv6 = false, is_ipv4 = false;
3052
3053 /* raweth_qp1_flags Bit 9-6 indicates itype */
3054 if ((raweth_qp1_flags & CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
3055 != CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS_ITYPE_ROCE)
3056 return -1;
3057
3058 if (raweth_qp1_flags2 &
3059 CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_CS_CALC &&
3060 raweth_qp1_flags2 &
3061 CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_L4_CS_CALC) {
3062 /* raweth_qp1_flags2 Bit 8 indicates ip_type. 0-v4 1 - v6 */
3063 (raweth_qp1_flags2 &
3064 CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_IP_TYPE) ?
3065 (is_ipv6 = true) : (is_ipv4 = true);
3066 return ((is_ipv6) ?
3067 BNXT_RE_ROCEV2_IPV6_PACKET :
3068 BNXT_RE_ROCEV2_IPV4_PACKET);
3069 } else {
3070 return BNXT_RE_ROCE_V1_PACKET;
3071 }
3072 }
3073
bnxt_re_to_ib_nw_type(int nw_type)3074 static int bnxt_re_to_ib_nw_type(int nw_type)
3075 {
3076 u8 nw_hdr_type = 0xFF;
3077
3078 switch (nw_type) {
3079 case BNXT_RE_ROCE_V1_PACKET:
3080 nw_hdr_type = RDMA_NETWORK_ROCE_V1;
3081 break;
3082 case BNXT_RE_ROCEV2_IPV4_PACKET:
3083 nw_hdr_type = RDMA_NETWORK_IPV4;
3084 break;
3085 case BNXT_RE_ROCEV2_IPV6_PACKET:
3086 nw_hdr_type = RDMA_NETWORK_IPV6;
3087 break;
3088 }
3089 return nw_hdr_type;
3090 }
3091
bnxt_re_is_loopback_packet(struct bnxt_re_dev * rdev,void * rq_hdr_buf)3092 static bool bnxt_re_is_loopback_packet(struct bnxt_re_dev *rdev,
3093 void *rq_hdr_buf)
3094 {
3095 u8 *tmp_buf = NULL;
3096 struct ethhdr *eth_hdr;
3097 u16 eth_type;
3098 bool rc = false;
3099
3100 tmp_buf = (u8 *)rq_hdr_buf;
3101 /*
3102 * If dest mac is not same as I/F mac, this could be a
3103 * loopback address or multicast address, check whether
3104 * it is a loopback packet
3105 */
3106 if (!ether_addr_equal(tmp_buf, rdev->netdev->dev_addr)) {
3107 tmp_buf += 4;
3108 /* Check the ether type */
3109 eth_hdr = (struct ethhdr *)tmp_buf;
3110 eth_type = ntohs(eth_hdr->h_proto);
3111 switch (eth_type) {
3112 case ETH_P_IBOE:
3113 rc = true;
3114 break;
3115 case ETH_P_IP:
3116 case ETH_P_IPV6: {
3117 u32 len;
3118 struct udphdr *udp_hdr;
3119
3120 len = (eth_type == ETH_P_IP ? sizeof(struct iphdr) :
3121 sizeof(struct ipv6hdr));
3122 tmp_buf += sizeof(struct ethhdr) + len;
3123 udp_hdr = (struct udphdr *)tmp_buf;
3124 if (ntohs(udp_hdr->dest) ==
3125 ROCE_V2_UDP_DPORT)
3126 rc = true;
3127 break;
3128 }
3129 default:
3130 break;
3131 }
3132 }
3133
3134 return rc;
3135 }
3136
bnxt_re_process_raw_qp_pkt_rx(struct bnxt_re_qp * gsi_qp,struct bnxt_qplib_cqe * cqe)3137 static int bnxt_re_process_raw_qp_pkt_rx(struct bnxt_re_qp *gsi_qp,
3138 struct bnxt_qplib_cqe *cqe)
3139 {
3140 struct bnxt_re_dev *rdev = gsi_qp->rdev;
3141 struct bnxt_re_sqp_entries *sqp_entry = NULL;
3142 struct bnxt_re_qp *gsi_sqp = rdev->gsi_ctx.gsi_sqp;
3143 struct bnxt_re_ah *gsi_sah;
3144 struct ib_send_wr *swr;
3145 struct ib_ud_wr udwr;
3146 struct ib_recv_wr rwr;
3147 int pkt_type = 0;
3148 u32 tbl_idx;
3149 void *rq_hdr_buf;
3150 dma_addr_t rq_hdr_buf_map;
3151 dma_addr_t shrq_hdr_buf_map;
3152 u32 offset = 0;
3153 u32 skip_bytes = 0;
3154 struct ib_sge s_sge[2];
3155 struct ib_sge r_sge[2];
3156 int rc;
3157
3158 memset(&udwr, 0, sizeof(udwr));
3159 memset(&rwr, 0, sizeof(rwr));
3160 memset(&s_sge, 0, sizeof(s_sge));
3161 memset(&r_sge, 0, sizeof(r_sge));
3162
3163 swr = &udwr.wr;
3164 tbl_idx = cqe->wr_id;
3165
3166 rq_hdr_buf = gsi_qp->qplib_qp.rq_hdr_buf +
3167 (tbl_idx * gsi_qp->qplib_qp.rq_hdr_buf_size);
3168 rq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&gsi_qp->qplib_qp,
3169 tbl_idx);
3170
3171 /* Shadow QP header buffer */
3172 shrq_hdr_buf_map = bnxt_qplib_get_qp_buf_from_index(&gsi_qp->qplib_qp,
3173 tbl_idx);
3174 sqp_entry = &rdev->gsi_ctx.sqp_tbl[tbl_idx];
3175
3176 /* Store this cqe */
3177 memcpy(&sqp_entry->cqe, cqe, sizeof(struct bnxt_qplib_cqe));
3178 sqp_entry->qp1_qp = gsi_qp;
3179
3180 /* Find packet type from the cqe */
3181
3182 pkt_type = bnxt_re_check_packet_type(cqe->raweth_qp1_flags,
3183 cqe->raweth_qp1_flags2);
3184 if (pkt_type < 0) {
3185 ibdev_err(&rdev->ibdev, "Invalid packet\n");
3186 return -EINVAL;
3187 }
3188
3189 /* Adjust the offset for the user buffer and post in the rq */
3190
3191 if (pkt_type == BNXT_RE_ROCEV2_IPV4_PACKET)
3192 offset = 20;
3193
3194 /*
3195 * QP1 loopback packet has 4 bytes of internal header before
3196 * ether header. Skip these four bytes.
3197 */
3198 if (bnxt_re_is_loopback_packet(rdev, rq_hdr_buf))
3199 skip_bytes = 4;
3200
3201 /* First send SGE . Skip the ether header*/
3202 s_sge[0].addr = rq_hdr_buf_map + BNXT_QPLIB_MAX_QP1_RQ_ETH_HDR_SIZE
3203 + skip_bytes;
3204 s_sge[0].lkey = 0xFFFFFFFF;
3205 s_sge[0].length = offset ? BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV4 :
3206 BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6;
3207
3208 /* Second Send SGE */
3209 s_sge[1].addr = s_sge[0].addr + s_sge[0].length +
3210 BNXT_QPLIB_MAX_QP1_RQ_BDETH_HDR_SIZE;
3211 if (pkt_type != BNXT_RE_ROCE_V1_PACKET)
3212 s_sge[1].addr += 8;
3213 s_sge[1].lkey = 0xFFFFFFFF;
3214 s_sge[1].length = 256;
3215
3216 /* First recv SGE */
3217
3218 r_sge[0].addr = shrq_hdr_buf_map;
3219 r_sge[0].lkey = 0xFFFFFFFF;
3220 r_sge[0].length = 40;
3221
3222 r_sge[1].addr = sqp_entry->sge.addr + offset;
3223 r_sge[1].lkey = sqp_entry->sge.lkey;
3224 r_sge[1].length = BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6 + 256 - offset;
3225
3226 /* Create receive work request */
3227 rwr.num_sge = 2;
3228 rwr.sg_list = r_sge;
3229 rwr.wr_id = tbl_idx;
3230 rwr.next = NULL;
3231
3232 rc = bnxt_re_post_recv_shadow_qp(rdev, gsi_sqp, &rwr);
3233 if (rc) {
3234 ibdev_err(&rdev->ibdev,
3235 "Failed to post Rx buffers to shadow QP");
3236 return -ENOMEM;
3237 }
3238
3239 swr->num_sge = 2;
3240 swr->sg_list = s_sge;
3241 swr->wr_id = tbl_idx;
3242 swr->opcode = IB_WR_SEND;
3243 swr->next = NULL;
3244 gsi_sah = rdev->gsi_ctx.gsi_sah;
3245 udwr.ah = &gsi_sah->ib_ah;
3246 udwr.remote_qpn = gsi_sqp->qplib_qp.id;
3247 udwr.remote_qkey = gsi_sqp->qplib_qp.qkey;
3248
3249 /* post data received in the send queue */
3250 rc = bnxt_re_post_send_shadow_qp(rdev, gsi_sqp, swr);
3251
3252 return 0;
3253 }
3254
bnxt_re_process_res_rawqp1_wc(struct ib_wc * wc,struct bnxt_qplib_cqe * cqe)3255 static void bnxt_re_process_res_rawqp1_wc(struct ib_wc *wc,
3256 struct bnxt_qplib_cqe *cqe)
3257 {
3258 wc->opcode = IB_WC_RECV;
3259 wc->status = __rawqp1_to_ib_wc_status(cqe->status);
3260 wc->wc_flags |= IB_WC_GRH;
3261 }
3262
bnxt_re_check_if_vlan_valid(struct bnxt_re_dev * rdev,u16 vlan_id)3263 static bool bnxt_re_check_if_vlan_valid(struct bnxt_re_dev *rdev,
3264 u16 vlan_id)
3265 {
3266 /*
3267 * Check if the vlan is configured in the host. If not configured, it
3268 * can be a transparent VLAN. So dont report the vlan id.
3269 */
3270 if (!__vlan_find_dev_deep_rcu(rdev->netdev,
3271 htons(ETH_P_8021Q), vlan_id))
3272 return false;
3273 return true;
3274 }
3275
bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe * orig_cqe,u16 * vid,u8 * sl)3276 static bool bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe *orig_cqe,
3277 u16 *vid, u8 *sl)
3278 {
3279 bool ret = false;
3280 u32 metadata;
3281 u16 tpid;
3282
3283 metadata = orig_cqe->raweth_qp1_metadata;
3284 if (orig_cqe->raweth_qp1_flags2 &
3285 CQ_RES_RAWETH_QP1_RAWETH_QP1_FLAGS2_META_FORMAT_VLAN) {
3286 tpid = ((metadata &
3287 CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_MASK) >>
3288 CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_TPID_SFT);
3289 if (tpid == ETH_P_8021Q) {
3290 *vid = metadata &
3291 CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_VID_MASK;
3292 *sl = (metadata &
3293 CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_MASK) >>
3294 CQ_RES_RAWETH_QP1_RAWETH_QP1_METADATA_PRI_SFT;
3295 ret = true;
3296 }
3297 }
3298
3299 return ret;
3300 }
3301
bnxt_re_process_res_rc_wc(struct ib_wc * wc,struct bnxt_qplib_cqe * cqe)3302 static void bnxt_re_process_res_rc_wc(struct ib_wc *wc,
3303 struct bnxt_qplib_cqe *cqe)
3304 {
3305 wc->opcode = IB_WC_RECV;
3306 wc->status = __rc_to_ib_wc_status(cqe->status);
3307
3308 if (cqe->flags & CQ_RES_RC_FLAGS_IMM)
3309 wc->wc_flags |= IB_WC_WITH_IMM;
3310 if (cqe->flags & CQ_RES_RC_FLAGS_INV)
3311 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
3312 if ((cqe->flags & (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM)) ==
3313 (CQ_RES_RC_FLAGS_RDMA | CQ_RES_RC_FLAGS_IMM))
3314 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
3315 }
3316
bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp * gsi_sqp,struct ib_wc * wc,struct bnxt_qplib_cqe * cqe)3317 static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *gsi_sqp,
3318 struct ib_wc *wc,
3319 struct bnxt_qplib_cqe *cqe)
3320 {
3321 struct bnxt_re_dev *rdev = gsi_sqp->rdev;
3322 struct bnxt_re_qp *gsi_qp = NULL;
3323 struct bnxt_qplib_cqe *orig_cqe = NULL;
3324 struct bnxt_re_sqp_entries *sqp_entry = NULL;
3325 int nw_type;
3326 u32 tbl_idx;
3327 u16 vlan_id;
3328 u8 sl;
3329
3330 tbl_idx = cqe->wr_id;
3331
3332 sqp_entry = &rdev->gsi_ctx.sqp_tbl[tbl_idx];
3333 gsi_qp = sqp_entry->qp1_qp;
3334 orig_cqe = &sqp_entry->cqe;
3335
3336 wc->wr_id = sqp_entry->wrid;
3337 wc->byte_len = orig_cqe->length;
3338 wc->qp = &gsi_qp->ib_qp;
3339
3340 wc->ex.imm_data = orig_cqe->immdata;
3341 wc->src_qp = orig_cqe->src_qp;
3342 memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
3343 if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
3344 if (bnxt_re_check_if_vlan_valid(rdev, vlan_id)) {
3345 wc->vlan_id = vlan_id;
3346 wc->sl = sl;
3347 wc->wc_flags |= IB_WC_WITH_VLAN;
3348 }
3349 }
3350 wc->port_num = 1;
3351 wc->vendor_err = orig_cqe->status;
3352
3353 wc->opcode = IB_WC_RECV;
3354 wc->status = __rawqp1_to_ib_wc_status(orig_cqe->status);
3355 wc->wc_flags |= IB_WC_GRH;
3356
3357 nw_type = bnxt_re_check_packet_type(orig_cqe->raweth_qp1_flags,
3358 orig_cqe->raweth_qp1_flags2);
3359 if (nw_type >= 0) {
3360 wc->network_hdr_type = bnxt_re_to_ib_nw_type(nw_type);
3361 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
3362 }
3363 }
3364
bnxt_re_process_res_ud_wc(struct bnxt_re_qp * qp,struct ib_wc * wc,struct bnxt_qplib_cqe * cqe)3365 static void bnxt_re_process_res_ud_wc(struct bnxt_re_qp *qp,
3366 struct ib_wc *wc,
3367 struct bnxt_qplib_cqe *cqe)
3368 {
3369 u8 nw_type;
3370
3371 wc->opcode = IB_WC_RECV;
3372 wc->status = __rc_to_ib_wc_status(cqe->status);
3373
3374 if (cqe->flags & CQ_RES_UD_FLAGS_IMM)
3375 wc->wc_flags |= IB_WC_WITH_IMM;
3376 /* report only on GSI QP for Thor */
3377 if (qp->qplib_qp.type == CMDQ_CREATE_QP_TYPE_GSI) {
3378 wc->wc_flags |= IB_WC_GRH;
3379 memcpy(wc->smac, cqe->smac, ETH_ALEN);
3380 wc->wc_flags |= IB_WC_WITH_SMAC;
3381 if (cqe->flags & CQ_RES_UD_FLAGS_META_FORMAT_VLAN) {
3382 wc->vlan_id = (cqe->cfa_meta & 0xFFF);
3383 if (wc->vlan_id < 0x1000)
3384 wc->wc_flags |= IB_WC_WITH_VLAN;
3385 }
3386 nw_type = (cqe->flags & CQ_RES_UD_FLAGS_ROCE_IP_VER_MASK) >>
3387 CQ_RES_UD_FLAGS_ROCE_IP_VER_SFT;
3388 wc->network_hdr_type = bnxt_re_to_ib_nw_type(nw_type);
3389 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
3390 }
3391
3392 }
3393
send_phantom_wqe(struct bnxt_re_qp * qp)3394 static int send_phantom_wqe(struct bnxt_re_qp *qp)
3395 {
3396 struct bnxt_qplib_qp *lib_qp = &qp->qplib_qp;
3397 unsigned long flags;
3398 int rc = 0;
3399
3400 spin_lock_irqsave(&qp->sq_lock, flags);
3401
3402 rc = bnxt_re_bind_fence_mw(lib_qp);
3403 if (!rc) {
3404 lib_qp->sq.phantom_wqe_cnt++;
3405 ibdev_dbg(&qp->rdev->ibdev,
3406 "qp %#x sq->prod %#x sw_prod %#x phantom_wqe_cnt %d\n",
3407 lib_qp->id, lib_qp->sq.hwq.prod,
3408 HWQ_CMP(lib_qp->sq.hwq.prod, &lib_qp->sq.hwq),
3409 lib_qp->sq.phantom_wqe_cnt);
3410 }
3411
3412 spin_unlock_irqrestore(&qp->sq_lock, flags);
3413 return rc;
3414 }
3415
bnxt_re_poll_cq(struct ib_cq * ib_cq,int num_entries,struct ib_wc * wc)3416 int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
3417 {
3418 struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
3419 struct bnxt_re_qp *qp, *sh_qp;
3420 struct bnxt_qplib_cqe *cqe;
3421 int i, ncqe, budget;
3422 struct bnxt_qplib_q *sq;
3423 struct bnxt_qplib_qp *lib_qp;
3424 u32 tbl_idx;
3425 struct bnxt_re_sqp_entries *sqp_entry = NULL;
3426 unsigned long flags;
3427
3428 spin_lock_irqsave(&cq->cq_lock, flags);
3429 budget = min_t(u32, num_entries, cq->max_cql);
3430 num_entries = budget;
3431 if (!cq->cql) {
3432 ibdev_err(&cq->rdev->ibdev, "POLL CQ : no CQL to use");
3433 goto exit;
3434 }
3435 cqe = &cq->cql[0];
3436 while (budget) {
3437 lib_qp = NULL;
3438 ncqe = bnxt_qplib_poll_cq(&cq->qplib_cq, cqe, budget, &lib_qp);
3439 if (lib_qp) {
3440 sq = &lib_qp->sq;
3441 if (sq->send_phantom) {
3442 qp = container_of(lib_qp,
3443 struct bnxt_re_qp, qplib_qp);
3444 if (send_phantom_wqe(qp) == -ENOMEM)
3445 ibdev_err(&cq->rdev->ibdev,
3446 "Phantom failed! Scheduled to send again\n");
3447 else
3448 sq->send_phantom = false;
3449 }
3450 }
3451 if (ncqe < budget)
3452 ncqe += bnxt_qplib_process_flush_list(&cq->qplib_cq,
3453 cqe + ncqe,
3454 budget - ncqe);
3455
3456 if (!ncqe)
3457 break;
3458
3459 for (i = 0; i < ncqe; i++, cqe++) {
3460 /* Transcribe each qplib_wqe back to ib_wc */
3461 memset(wc, 0, sizeof(*wc));
3462
3463 wc->wr_id = cqe->wr_id;
3464 wc->byte_len = cqe->length;
3465 qp = container_of
3466 ((struct bnxt_qplib_qp *)
3467 (unsigned long)(cqe->qp_handle),
3468 struct bnxt_re_qp, qplib_qp);
3469 if (!qp) {
3470 ibdev_err(&cq->rdev->ibdev, "POLL CQ : bad QP handle");
3471 continue;
3472 }
3473 wc->qp = &qp->ib_qp;
3474 wc->ex.imm_data = cqe->immdata;
3475 wc->src_qp = cqe->src_qp;
3476 memcpy(wc->smac, cqe->smac, ETH_ALEN);
3477 wc->port_num = 1;
3478 wc->vendor_err = cqe->status;
3479
3480 switch (cqe->opcode) {
3481 case CQ_BASE_CQE_TYPE_REQ:
3482 sh_qp = qp->rdev->gsi_ctx.gsi_sqp;
3483 if (sh_qp &&
3484 qp->qplib_qp.id == sh_qp->qplib_qp.id) {
3485 /* Handle this completion with
3486 * the stored completion
3487 */
3488 memset(wc, 0, sizeof(*wc));
3489 continue;
3490 }
3491 bnxt_re_process_req_wc(wc, cqe);
3492 break;
3493 case CQ_BASE_CQE_TYPE_RES_RAWETH_QP1:
3494 if (!cqe->status) {
3495 int rc = 0;
3496
3497 rc = bnxt_re_process_raw_qp_pkt_rx
3498 (qp, cqe);
3499 if (!rc) {
3500 memset(wc, 0, sizeof(*wc));
3501 continue;
3502 }
3503 cqe->status = -1;
3504 }
3505 /* Errors need not be looped back.
3506 * But change the wr_id to the one
3507 * stored in the table
3508 */
3509 tbl_idx = cqe->wr_id;
3510 sqp_entry = &cq->rdev->gsi_ctx.sqp_tbl[tbl_idx];
3511 wc->wr_id = sqp_entry->wrid;
3512 bnxt_re_process_res_rawqp1_wc(wc, cqe);
3513 break;
3514 case CQ_BASE_CQE_TYPE_RES_RC:
3515 bnxt_re_process_res_rc_wc(wc, cqe);
3516 break;
3517 case CQ_BASE_CQE_TYPE_RES_UD:
3518 sh_qp = qp->rdev->gsi_ctx.gsi_sqp;
3519 if (sh_qp &&
3520 qp->qplib_qp.id == sh_qp->qplib_qp.id) {
3521 /* Handle this completion with
3522 * the stored completion
3523 */
3524 if (cqe->status) {
3525 continue;
3526 } else {
3527 bnxt_re_process_res_shadow_qp_wc
3528 (qp, wc, cqe);
3529 break;
3530 }
3531 }
3532 bnxt_re_process_res_ud_wc(qp, wc, cqe);
3533 break;
3534 default:
3535 ibdev_err(&cq->rdev->ibdev,
3536 "POLL CQ : type 0x%x not handled",
3537 cqe->opcode);
3538 continue;
3539 }
3540 wc++;
3541 budget--;
3542 }
3543 }
3544 exit:
3545 spin_unlock_irqrestore(&cq->cq_lock, flags);
3546 return num_entries - budget;
3547 }
3548
bnxt_re_req_notify_cq(struct ib_cq * ib_cq,enum ib_cq_notify_flags ib_cqn_flags)3549 int bnxt_re_req_notify_cq(struct ib_cq *ib_cq,
3550 enum ib_cq_notify_flags ib_cqn_flags)
3551 {
3552 struct bnxt_re_cq *cq = container_of(ib_cq, struct bnxt_re_cq, ib_cq);
3553 int type = 0, rc = 0;
3554 unsigned long flags;
3555
3556 spin_lock_irqsave(&cq->cq_lock, flags);
3557 /* Trigger on the very next completion */
3558 if (ib_cqn_flags & IB_CQ_NEXT_COMP)
3559 type = DBC_DBC_TYPE_CQ_ARMALL;
3560 /* Trigger on the next solicited completion */
3561 else if (ib_cqn_flags & IB_CQ_SOLICITED)
3562 type = DBC_DBC_TYPE_CQ_ARMSE;
3563
3564 /* Poll to see if there are missed events */
3565 if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
3566 !(bnxt_qplib_is_cq_empty(&cq->qplib_cq))) {
3567 rc = 1;
3568 goto exit;
3569 }
3570 bnxt_qplib_req_notify_cq(&cq->qplib_cq, type);
3571
3572 exit:
3573 spin_unlock_irqrestore(&cq->cq_lock, flags);
3574 return rc;
3575 }
3576
3577 /* Memory Regions */
bnxt_re_get_dma_mr(struct ib_pd * ib_pd,int mr_access_flags)3578 struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *ib_pd, int mr_access_flags)
3579 {
3580 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3581 struct bnxt_re_dev *rdev = pd->rdev;
3582 struct bnxt_re_mr *mr;
3583 u64 pbl = 0;
3584 int rc;
3585
3586 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3587 if (!mr)
3588 return ERR_PTR(-ENOMEM);
3589
3590 mr->rdev = rdev;
3591 mr->qplib_mr.pd = &pd->qplib_pd;
3592 mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
3593 mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
3594
3595 /* Allocate and register 0 as the address */
3596 rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3597 if (rc)
3598 goto fail;
3599
3600 mr->qplib_mr.hwq.level = PBL_LVL_MAX;
3601 mr->qplib_mr.total_size = -1; /* Infinte length */
3602 rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, &pbl, 0, false,
3603 PAGE_SIZE);
3604 if (rc)
3605 goto fail_mr;
3606
3607 mr->ib_mr.lkey = mr->qplib_mr.lkey;
3608 if (mr_access_flags & (IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ |
3609 IB_ACCESS_REMOTE_ATOMIC))
3610 mr->ib_mr.rkey = mr->ib_mr.lkey;
3611 atomic_inc(&rdev->mr_count);
3612
3613 return &mr->ib_mr;
3614
3615 fail_mr:
3616 bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3617 fail:
3618 kfree(mr);
3619 return ERR_PTR(rc);
3620 }
3621
bnxt_re_dereg_mr(struct ib_mr * ib_mr,struct ib_udata * udata)3622 int bnxt_re_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
3623 {
3624 struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3625 struct bnxt_re_dev *rdev = mr->rdev;
3626 int rc;
3627
3628 rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3629 if (rc) {
3630 ibdev_err(&rdev->ibdev, "Dereg MR failed: %#x\n", rc);
3631 return rc;
3632 }
3633
3634 if (mr->pages) {
3635 rc = bnxt_qplib_free_fast_reg_page_list(&rdev->qplib_res,
3636 &mr->qplib_frpl);
3637 kfree(mr->pages);
3638 mr->npages = 0;
3639 mr->pages = NULL;
3640 }
3641 ib_umem_release(mr->ib_umem);
3642
3643 kfree(mr);
3644 atomic_dec(&rdev->mr_count);
3645 return rc;
3646 }
3647
bnxt_re_set_page(struct ib_mr * ib_mr,u64 addr)3648 static int bnxt_re_set_page(struct ib_mr *ib_mr, u64 addr)
3649 {
3650 struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3651
3652 if (unlikely(mr->npages == mr->qplib_frpl.max_pg_ptrs))
3653 return -ENOMEM;
3654
3655 mr->pages[mr->npages++] = addr;
3656 return 0;
3657 }
3658
bnxt_re_map_mr_sg(struct ib_mr * ib_mr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset)3659 int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
3660 unsigned int *sg_offset)
3661 {
3662 struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
3663
3664 mr->npages = 0;
3665 return ib_sg_to_pages(ib_mr, sg, sg_nents, sg_offset, bnxt_re_set_page);
3666 }
3667
bnxt_re_alloc_mr(struct ib_pd * ib_pd,enum ib_mr_type type,u32 max_num_sg)3668 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type type,
3669 u32 max_num_sg)
3670 {
3671 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3672 struct bnxt_re_dev *rdev = pd->rdev;
3673 struct bnxt_re_mr *mr = NULL;
3674 int rc;
3675
3676 if (type != IB_MR_TYPE_MEM_REG) {
3677 ibdev_dbg(&rdev->ibdev, "MR type 0x%x not supported", type);
3678 return ERR_PTR(-EINVAL);
3679 }
3680 if (max_num_sg > MAX_PBL_LVL_1_PGS)
3681 return ERR_PTR(-EINVAL);
3682
3683 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3684 if (!mr)
3685 return ERR_PTR(-ENOMEM);
3686
3687 mr->rdev = rdev;
3688 mr->qplib_mr.pd = &pd->qplib_pd;
3689 mr->qplib_mr.flags = BNXT_QPLIB_FR_PMR;
3690 mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
3691
3692 rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3693 if (rc)
3694 goto bail;
3695
3696 mr->ib_mr.lkey = mr->qplib_mr.lkey;
3697 mr->ib_mr.rkey = mr->ib_mr.lkey;
3698
3699 mr->pages = kcalloc(max_num_sg, sizeof(u64), GFP_KERNEL);
3700 if (!mr->pages) {
3701 rc = -ENOMEM;
3702 goto fail;
3703 }
3704 rc = bnxt_qplib_alloc_fast_reg_page_list(&rdev->qplib_res,
3705 &mr->qplib_frpl, max_num_sg);
3706 if (rc) {
3707 ibdev_err(&rdev->ibdev,
3708 "Failed to allocate HW FR page list");
3709 goto fail_mr;
3710 }
3711
3712 atomic_inc(&rdev->mr_count);
3713 return &mr->ib_mr;
3714
3715 fail_mr:
3716 kfree(mr->pages);
3717 fail:
3718 bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3719 bail:
3720 kfree(mr);
3721 return ERR_PTR(rc);
3722 }
3723
bnxt_re_alloc_mw(struct ib_pd * ib_pd,enum ib_mw_type type,struct ib_udata * udata)3724 struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
3725 struct ib_udata *udata)
3726 {
3727 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3728 struct bnxt_re_dev *rdev = pd->rdev;
3729 struct bnxt_re_mw *mw;
3730 int rc;
3731
3732 mw = kzalloc(sizeof(*mw), GFP_KERNEL);
3733 if (!mw)
3734 return ERR_PTR(-ENOMEM);
3735 mw->rdev = rdev;
3736 mw->qplib_mw.pd = &pd->qplib_pd;
3737
3738 mw->qplib_mw.type = (type == IB_MW_TYPE_1 ?
3739 CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE1 :
3740 CMDQ_ALLOCATE_MRW_MRW_FLAGS_MW_TYPE2B);
3741 rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mw->qplib_mw);
3742 if (rc) {
3743 ibdev_err(&rdev->ibdev, "Allocate MW failed!");
3744 goto fail;
3745 }
3746 mw->ib_mw.rkey = mw->qplib_mw.rkey;
3747
3748 atomic_inc(&rdev->mw_count);
3749 return &mw->ib_mw;
3750
3751 fail:
3752 kfree(mw);
3753 return ERR_PTR(rc);
3754 }
3755
bnxt_re_dealloc_mw(struct ib_mw * ib_mw)3756 int bnxt_re_dealloc_mw(struct ib_mw *ib_mw)
3757 {
3758 struct bnxt_re_mw *mw = container_of(ib_mw, struct bnxt_re_mw, ib_mw);
3759 struct bnxt_re_dev *rdev = mw->rdev;
3760 int rc;
3761
3762 rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mw->qplib_mw);
3763 if (rc) {
3764 ibdev_err(&rdev->ibdev, "Free MW failed: %#x\n", rc);
3765 return rc;
3766 }
3767
3768 kfree(mw);
3769 atomic_dec(&rdev->mw_count);
3770 return rc;
3771 }
3772
fill_umem_pbl_tbl(struct ib_umem * umem,u64 * pbl_tbl_orig,int page_shift)3773 static int fill_umem_pbl_tbl(struct ib_umem *umem, u64 *pbl_tbl_orig,
3774 int page_shift)
3775 {
3776 u64 *pbl_tbl = pbl_tbl_orig;
3777 u64 page_size = BIT_ULL(page_shift);
3778 struct ib_block_iter biter;
3779
3780 rdma_umem_for_each_dma_block(umem, &biter, page_size)
3781 *pbl_tbl++ = rdma_block_iter_dma_address(&biter);
3782
3783 return pbl_tbl - pbl_tbl_orig;
3784 }
3785
3786 /* uverbs */
bnxt_re_reg_user_mr(struct ib_pd * ib_pd,u64 start,u64 length,u64 virt_addr,int mr_access_flags,struct ib_udata * udata)3787 struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *ib_pd, u64 start, u64 length,
3788 u64 virt_addr, int mr_access_flags,
3789 struct ib_udata *udata)
3790 {
3791 struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd);
3792 struct bnxt_re_dev *rdev = pd->rdev;
3793 struct bnxt_re_mr *mr;
3794 struct ib_umem *umem;
3795 u64 *pbl_tbl = NULL;
3796 unsigned long page_size;
3797 int umem_pgs, rc;
3798
3799 if (length > BNXT_RE_MAX_MR_SIZE) {
3800 ibdev_err(&rdev->ibdev, "MR Size: %lld > Max supported:%lld\n",
3801 length, BNXT_RE_MAX_MR_SIZE);
3802 return ERR_PTR(-ENOMEM);
3803 }
3804
3805 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3806 if (!mr)
3807 return ERR_PTR(-ENOMEM);
3808
3809 mr->rdev = rdev;
3810 mr->qplib_mr.pd = &pd->qplib_pd;
3811 mr->qplib_mr.flags = __from_ib_access_flags(mr_access_flags);
3812 mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_MR;
3813
3814 rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
3815 if (rc) {
3816 ibdev_err(&rdev->ibdev, "Failed to allocate MR");
3817 goto free_mr;
3818 }
3819 /* The fixed portion of the rkey is the same as the lkey */
3820 mr->ib_mr.rkey = mr->qplib_mr.rkey;
3821
3822 umem = ib_umem_get(&rdev->ibdev, start, length, mr_access_flags);
3823 if (IS_ERR(umem)) {
3824 ibdev_err(&rdev->ibdev, "Failed to get umem");
3825 rc = -EFAULT;
3826 goto free_mrw;
3827 }
3828 mr->ib_umem = umem;
3829
3830 mr->qplib_mr.va = virt_addr;
3831 page_size = ib_umem_find_best_pgsz(
3832 umem, BNXT_RE_PAGE_SIZE_4K | BNXT_RE_PAGE_SIZE_2M, virt_addr);
3833 if (!page_size) {
3834 ibdev_err(&rdev->ibdev, "umem page size unsupported!");
3835 rc = -EFAULT;
3836 goto free_umem;
3837 }
3838 mr->qplib_mr.total_size = length;
3839
3840 if (page_size == BNXT_RE_PAGE_SIZE_4K &&
3841 length > BNXT_RE_MAX_MR_SIZE_LOW) {
3842 ibdev_err(&rdev->ibdev, "Requested MR Sz:%llu Max sup:%llu",
3843 length, (u64)BNXT_RE_MAX_MR_SIZE_LOW);
3844 rc = -EINVAL;
3845 goto free_umem;
3846 }
3847
3848 umem_pgs = ib_umem_num_dma_blocks(umem, page_size);
3849 pbl_tbl = kcalloc(umem_pgs, sizeof(*pbl_tbl), GFP_KERNEL);
3850 if (!pbl_tbl) {
3851 rc = -ENOMEM;
3852 goto free_umem;
3853 }
3854
3855 /* Map umem buf ptrs to the PBL */
3856 umem_pgs = fill_umem_pbl_tbl(umem, pbl_tbl, order_base_2(page_size));
3857 rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, pbl_tbl,
3858 umem_pgs, false, page_size);
3859 if (rc) {
3860 ibdev_err(&rdev->ibdev, "Failed to register user MR");
3861 goto fail;
3862 }
3863
3864 kfree(pbl_tbl);
3865
3866 mr->ib_mr.lkey = mr->qplib_mr.lkey;
3867 mr->ib_mr.rkey = mr->qplib_mr.lkey;
3868 atomic_inc(&rdev->mr_count);
3869
3870 return &mr->ib_mr;
3871 fail:
3872 kfree(pbl_tbl);
3873 free_umem:
3874 ib_umem_release(umem);
3875 free_mrw:
3876 bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
3877 free_mr:
3878 kfree(mr);
3879 return ERR_PTR(rc);
3880 }
3881
bnxt_re_alloc_ucontext(struct ib_ucontext * ctx,struct ib_udata * udata)3882 int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata)
3883 {
3884 struct ib_device *ibdev = ctx->device;
3885 struct bnxt_re_ucontext *uctx =
3886 container_of(ctx, struct bnxt_re_ucontext, ib_uctx);
3887 struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
3888 struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr;
3889 struct bnxt_re_uctx_resp resp;
3890 u32 chip_met_rev_num = 0;
3891 int rc;
3892
3893 ibdev_dbg(ibdev, "ABI version requested %u", ibdev->ops.uverbs_abi_ver);
3894
3895 if (ibdev->ops.uverbs_abi_ver != BNXT_RE_ABI_VERSION) {
3896 ibdev_dbg(ibdev, " is different from the device %d ",
3897 BNXT_RE_ABI_VERSION);
3898 return -EPERM;
3899 }
3900
3901 uctx->rdev = rdev;
3902
3903 uctx->shpg = (void *)__get_free_page(GFP_KERNEL);
3904 if (!uctx->shpg) {
3905 rc = -ENOMEM;
3906 goto fail;
3907 }
3908 spin_lock_init(&uctx->sh_lock);
3909
3910 resp.comp_mask = BNXT_RE_UCNTX_CMASK_HAVE_CCTX;
3911 chip_met_rev_num = rdev->chip_ctx->chip_num;
3912 chip_met_rev_num |= ((u32)rdev->chip_ctx->chip_rev & 0xFF) <<
3913 BNXT_RE_CHIP_ID0_CHIP_REV_SFT;
3914 chip_met_rev_num |= ((u32)rdev->chip_ctx->chip_metal & 0xFF) <<
3915 BNXT_RE_CHIP_ID0_CHIP_MET_SFT;
3916 resp.chip_id0 = chip_met_rev_num;
3917 /* Future extension of chip info */
3918 resp.chip_id1 = 0;
3919 /*Temp, Use xa_alloc instead */
3920 resp.dev_id = rdev->en_dev->pdev->devfn;
3921 resp.max_qp = rdev->qplib_ctx.qpc_count;
3922 resp.pg_size = PAGE_SIZE;
3923 resp.cqe_sz = sizeof(struct cq_base);
3924 resp.max_cqd = dev_attr->max_cq_wqes;
3925 resp.rsvd = 0;
3926
3927 rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp)));
3928 if (rc) {
3929 ibdev_err(ibdev, "Failed to copy user context");
3930 rc = -EFAULT;
3931 goto cfail;
3932 }
3933
3934 return 0;
3935 cfail:
3936 free_page((unsigned long)uctx->shpg);
3937 uctx->shpg = NULL;
3938 fail:
3939 return rc;
3940 }
3941
bnxt_re_dealloc_ucontext(struct ib_ucontext * ib_uctx)3942 void bnxt_re_dealloc_ucontext(struct ib_ucontext *ib_uctx)
3943 {
3944 struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
3945 struct bnxt_re_ucontext,
3946 ib_uctx);
3947
3948 struct bnxt_re_dev *rdev = uctx->rdev;
3949
3950 if (uctx->shpg)
3951 free_page((unsigned long)uctx->shpg);
3952
3953 if (uctx->dpi.dbr) {
3954 /* Free DPI only if this is the first PD allocated by the
3955 * application and mark the context dpi as NULL
3956 */
3957 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
3958 &rdev->qplib_res.dpi_tbl, &uctx->dpi);
3959 uctx->dpi.dbr = NULL;
3960 }
3961 }
3962
3963 /* Helper function to mmap the virtual memory from user app */
bnxt_re_mmap(struct ib_ucontext * ib_uctx,struct vm_area_struct * vma)3964 int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma)
3965 {
3966 struct bnxt_re_ucontext *uctx = container_of(ib_uctx,
3967 struct bnxt_re_ucontext,
3968 ib_uctx);
3969 struct bnxt_re_dev *rdev = uctx->rdev;
3970 u64 pfn;
3971
3972 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
3973 return -EINVAL;
3974
3975 if (vma->vm_pgoff) {
3976 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
3977 if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
3978 PAGE_SIZE, vma->vm_page_prot)) {
3979 ibdev_err(&rdev->ibdev, "Failed to map DPI");
3980 return -EAGAIN;
3981 }
3982 } else {
3983 pfn = virt_to_phys(uctx->shpg) >> PAGE_SHIFT;
3984 if (remap_pfn_range(vma, vma->vm_start,
3985 pfn, PAGE_SIZE, vma->vm_page_prot)) {
3986 ibdev_err(&rdev->ibdev, "Failed to map shared page");
3987 return -EAGAIN;
3988 }
3989 }
3990
3991 return 0;
3992 }
3993