1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Authors: Cheng Xu <chengyou@linux.alibaba.com> */
4 /* Kai Shen <kaishen@linux.alibaba.com> */
5 /* Copyright (c) 2020-2022, Alibaba Group. */
6
7 /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
8 /* Copyright (c) 2008-2019, IBM Corporation */
9
10 /* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. */
11
12 #include <linux/vmalloc.h>
13 #include <net/addrconf.h>
14 #include <rdma/erdma-abi.h>
15 #include <rdma/ib_umem.h>
16 #include <rdma/uverbs_ioctl.h>
17
18 #include "erdma.h"
19 #include "erdma_cm.h"
20 #include "erdma_verbs.h"
21
assemble_qbuf_mtt_for_cmd(struct erdma_mem * mem,u32 * cfg,u64 * addr0,u64 * addr1)22 static void assemble_qbuf_mtt_for_cmd(struct erdma_mem *mem, u32 *cfg,
23 u64 *addr0, u64 *addr1)
24 {
25 struct erdma_mtt *mtt = mem->mtt;
26
27 if (mem->mtt_nents > ERDMA_MAX_INLINE_MTT_ENTRIES) {
28 *addr0 = mtt->buf_dma;
29 *cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_LEVEL_MASK,
30 ERDMA_MR_MTT_1LEVEL);
31 } else {
32 *addr0 = mtt->buf[0];
33 memcpy(addr1, mtt->buf + 1, MTT_SIZE(mem->mtt_nents - 1));
34 *cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_LEVEL_MASK,
35 ERDMA_MR_MTT_0LEVEL);
36 }
37 }
38
create_qp_cmd(struct erdma_ucontext * uctx,struct erdma_qp * qp)39 static int create_qp_cmd(struct erdma_ucontext *uctx, struct erdma_qp *qp)
40 {
41 struct erdma_dev *dev = to_edev(qp->ibqp.device);
42 struct erdma_pd *pd = to_epd(qp->ibqp.pd);
43 struct erdma_cmdq_create_qp_req req;
44 struct erdma_uqp *user_qp;
45 u64 resp0, resp1;
46 int err;
47
48 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
49 CMDQ_OPCODE_CREATE_QP);
50
51 req.cfg0 = FIELD_PREP(ERDMA_CMD_CREATE_QP_SQ_DEPTH_MASK,
52 ilog2(qp->attrs.sq_size)) |
53 FIELD_PREP(ERDMA_CMD_CREATE_QP_QPN_MASK, QP_ID(qp));
54 req.cfg1 = FIELD_PREP(ERDMA_CMD_CREATE_QP_RQ_DEPTH_MASK,
55 ilog2(qp->attrs.rq_size)) |
56 FIELD_PREP(ERDMA_CMD_CREATE_QP_PD_MASK, pd->pdn);
57
58 if (rdma_is_kernel_res(&qp->ibqp.res)) {
59 u32 pgsz_range = ilog2(SZ_1M) - ERDMA_HW_PAGE_SHIFT;
60
61 req.sq_cqn_mtt_cfg =
62 FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK,
63 pgsz_range) |
64 FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->scq->cqn);
65 req.rq_cqn_mtt_cfg =
66 FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK,
67 pgsz_range) |
68 FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->rcq->cqn);
69
70 req.sq_mtt_cfg =
71 FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_OFFSET_MASK, 0) |
72 FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK, 1) |
73 FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_LEVEL_MASK,
74 ERDMA_MR_MTT_0LEVEL);
75 req.rq_mtt_cfg = req.sq_mtt_cfg;
76
77 req.rq_buf_addr = qp->kern_qp.rq_buf_dma_addr;
78 req.sq_buf_addr = qp->kern_qp.sq_buf_dma_addr;
79 req.sq_dbrec_dma = qp->kern_qp.sq_dbrec_dma;
80 req.rq_dbrec_dma = qp->kern_qp.rq_dbrec_dma;
81 } else {
82 user_qp = &qp->user_qp;
83 req.sq_cqn_mtt_cfg = FIELD_PREP(
84 ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK,
85 ilog2(user_qp->sq_mem.page_size) - ERDMA_HW_PAGE_SHIFT);
86 req.sq_cqn_mtt_cfg |=
87 FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->scq->cqn);
88
89 req.rq_cqn_mtt_cfg = FIELD_PREP(
90 ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK,
91 ilog2(user_qp->rq_mem.page_size) - ERDMA_HW_PAGE_SHIFT);
92 req.rq_cqn_mtt_cfg |=
93 FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->rcq->cqn);
94
95 req.sq_mtt_cfg = user_qp->sq_mem.page_offset;
96 req.sq_mtt_cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK,
97 user_qp->sq_mem.mtt_nents);
98
99 req.rq_mtt_cfg = user_qp->rq_mem.page_offset;
100 req.rq_mtt_cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK,
101 user_qp->rq_mem.mtt_nents);
102
103 assemble_qbuf_mtt_for_cmd(&user_qp->sq_mem, &req.sq_mtt_cfg,
104 &req.sq_buf_addr, req.sq_mtt_entry);
105 assemble_qbuf_mtt_for_cmd(&user_qp->rq_mem, &req.rq_mtt_cfg,
106 &req.rq_buf_addr, req.rq_mtt_entry);
107
108 req.sq_dbrec_dma = user_qp->sq_dbrec_dma;
109 req.rq_dbrec_dma = user_qp->rq_dbrec_dma;
110
111 if (uctx->ext_db.enable) {
112 req.sq_cqn_mtt_cfg |=
113 FIELD_PREP(ERDMA_CMD_CREATE_QP_DB_CFG_MASK, 1);
114 req.db_cfg =
115 FIELD_PREP(ERDMA_CMD_CREATE_QP_SQDB_CFG_MASK,
116 uctx->ext_db.sdb_off) |
117 FIELD_PREP(ERDMA_CMD_CREATE_QP_RQDB_CFG_MASK,
118 uctx->ext_db.rdb_off);
119 }
120 }
121
122 err = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), &resp0,
123 &resp1);
124 if (!err)
125 qp->attrs.cookie =
126 FIELD_GET(ERDMA_CMDQ_CREATE_QP_RESP_COOKIE_MASK, resp0);
127
128 return err;
129 }
130
regmr_cmd(struct erdma_dev * dev,struct erdma_mr * mr)131 static int regmr_cmd(struct erdma_dev *dev, struct erdma_mr *mr)
132 {
133 struct erdma_pd *pd = to_epd(mr->ibmr.pd);
134 u32 mtt_level = ERDMA_MR_MTT_0LEVEL;
135 struct erdma_cmdq_reg_mr_req req;
136
137 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, CMDQ_OPCODE_REG_MR);
138
139 if (mr->type == ERDMA_MR_TYPE_FRMR ||
140 mr->mem.page_cnt > ERDMA_MAX_INLINE_MTT_ENTRIES) {
141 if (mr->mem.mtt->continuous) {
142 req.phy_addr[0] = mr->mem.mtt->buf_dma;
143 mtt_level = ERDMA_MR_MTT_1LEVEL;
144 } else {
145 req.phy_addr[0] = sg_dma_address(mr->mem.mtt->sglist);
146 mtt_level = mr->mem.mtt->level;
147 }
148 } else if (mr->type != ERDMA_MR_TYPE_DMA) {
149 memcpy(req.phy_addr, mr->mem.mtt->buf,
150 MTT_SIZE(mr->mem.page_cnt));
151 }
152
153 req.cfg0 = FIELD_PREP(ERDMA_CMD_MR_VALID_MASK, mr->valid) |
154 FIELD_PREP(ERDMA_CMD_MR_KEY_MASK, mr->ibmr.lkey & 0xFF) |
155 FIELD_PREP(ERDMA_CMD_MR_MPT_IDX_MASK, mr->ibmr.lkey >> 8);
156 req.cfg1 = FIELD_PREP(ERDMA_CMD_REGMR_PD_MASK, pd->pdn) |
157 FIELD_PREP(ERDMA_CMD_REGMR_TYPE_MASK, mr->type) |
158 FIELD_PREP(ERDMA_CMD_REGMR_RIGHT_MASK, mr->access);
159 req.cfg2 = FIELD_PREP(ERDMA_CMD_REGMR_PAGESIZE_MASK,
160 ilog2(mr->mem.page_size)) |
161 FIELD_PREP(ERDMA_CMD_REGMR_MTT_LEVEL_MASK, mtt_level) |
162 FIELD_PREP(ERDMA_CMD_REGMR_MTT_CNT_MASK, mr->mem.page_cnt);
163
164 if (mr->type == ERDMA_MR_TYPE_DMA)
165 goto post_cmd;
166
167 if (mr->type == ERDMA_MR_TYPE_NORMAL) {
168 req.start_va = mr->mem.va;
169 req.size = mr->mem.len;
170 }
171
172 if (!mr->mem.mtt->continuous && mr->mem.mtt->level > 1) {
173 req.cfg0 |= FIELD_PREP(ERDMA_CMD_MR_VERSION_MASK, 1);
174 req.cfg2 |= FIELD_PREP(ERDMA_CMD_REGMR_MTT_PAGESIZE_MASK,
175 PAGE_SHIFT - ERDMA_HW_PAGE_SHIFT);
176 req.size_h = upper_32_bits(mr->mem.len);
177 req.mtt_cnt_h = mr->mem.page_cnt >> 20;
178 }
179
180 post_cmd:
181 return erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
182 }
183
create_cq_cmd(struct erdma_ucontext * uctx,struct erdma_cq * cq)184 static int create_cq_cmd(struct erdma_ucontext *uctx, struct erdma_cq *cq)
185 {
186 struct erdma_dev *dev = to_edev(cq->ibcq.device);
187 struct erdma_cmdq_create_cq_req req;
188 struct erdma_mem *mem;
189 u32 page_size;
190
191 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
192 CMDQ_OPCODE_CREATE_CQ);
193
194 req.cfg0 = FIELD_PREP(ERDMA_CMD_CREATE_CQ_CQN_MASK, cq->cqn) |
195 FIELD_PREP(ERDMA_CMD_CREATE_CQ_DEPTH_MASK, ilog2(cq->depth));
196 req.cfg1 = FIELD_PREP(ERDMA_CMD_CREATE_CQ_EQN_MASK, cq->assoc_eqn);
197
198 if (rdma_is_kernel_res(&cq->ibcq.res)) {
199 page_size = SZ_32M;
200 req.cfg0 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_PAGESIZE_MASK,
201 ilog2(page_size) - ERDMA_HW_PAGE_SHIFT);
202 req.qbuf_addr_l = lower_32_bits(cq->kern_cq.qbuf_dma_addr);
203 req.qbuf_addr_h = upper_32_bits(cq->kern_cq.qbuf_dma_addr);
204
205 req.cfg1 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_CNT_MASK, 1) |
206 FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_LEVEL_MASK,
207 ERDMA_MR_MTT_0LEVEL);
208
209 req.first_page_offset = 0;
210 req.cq_dbrec_dma = cq->kern_cq.dbrec_dma;
211 } else {
212 mem = &cq->user_cq.qbuf_mem;
213 req.cfg0 |=
214 FIELD_PREP(ERDMA_CMD_CREATE_CQ_PAGESIZE_MASK,
215 ilog2(mem->page_size) - ERDMA_HW_PAGE_SHIFT);
216 if (mem->mtt_nents == 1) {
217 req.qbuf_addr_l = lower_32_bits(mem->mtt->buf[0]);
218 req.qbuf_addr_h = upper_32_bits(mem->mtt->buf[0]);
219 req.cfg1 |=
220 FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_LEVEL_MASK,
221 ERDMA_MR_MTT_0LEVEL);
222 } else {
223 req.qbuf_addr_l = lower_32_bits(mem->mtt->buf_dma);
224 req.qbuf_addr_h = upper_32_bits(mem->mtt->buf_dma);
225 req.cfg1 |=
226 FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_LEVEL_MASK,
227 ERDMA_MR_MTT_1LEVEL);
228 }
229 req.cfg1 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_CNT_MASK,
230 mem->mtt_nents);
231
232 req.first_page_offset = mem->page_offset;
233 req.cq_dbrec_dma = cq->user_cq.dbrec_dma;
234
235 if (uctx->ext_db.enable) {
236 req.cfg1 |= FIELD_PREP(
237 ERDMA_CMD_CREATE_CQ_MTT_DB_CFG_MASK, 1);
238 req.cfg2 = FIELD_PREP(ERDMA_CMD_CREATE_CQ_DB_CFG_MASK,
239 uctx->ext_db.cdb_off);
240 }
241 }
242
243 return erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
244 }
245
erdma_alloc_idx(struct erdma_resource_cb * res_cb)246 static int erdma_alloc_idx(struct erdma_resource_cb *res_cb)
247 {
248 int idx;
249 unsigned long flags;
250
251 spin_lock_irqsave(&res_cb->lock, flags);
252 idx = find_next_zero_bit(res_cb->bitmap, res_cb->max_cap,
253 res_cb->next_alloc_idx);
254 if (idx == res_cb->max_cap) {
255 idx = find_first_zero_bit(res_cb->bitmap, res_cb->max_cap);
256 if (idx == res_cb->max_cap) {
257 res_cb->next_alloc_idx = 1;
258 spin_unlock_irqrestore(&res_cb->lock, flags);
259 return -ENOSPC;
260 }
261 }
262
263 set_bit(idx, res_cb->bitmap);
264 res_cb->next_alloc_idx = idx + 1;
265 spin_unlock_irqrestore(&res_cb->lock, flags);
266
267 return idx;
268 }
269
erdma_free_idx(struct erdma_resource_cb * res_cb,u32 idx)270 static inline void erdma_free_idx(struct erdma_resource_cb *res_cb, u32 idx)
271 {
272 unsigned long flags;
273 u32 used;
274
275 spin_lock_irqsave(&res_cb->lock, flags);
276 used = __test_and_clear_bit(idx, res_cb->bitmap);
277 spin_unlock_irqrestore(&res_cb->lock, flags);
278 WARN_ON(!used);
279 }
280
281 static struct rdma_user_mmap_entry *
erdma_user_mmap_entry_insert(struct erdma_ucontext * uctx,void * address,u32 size,u8 mmap_flag,u64 * mmap_offset)282 erdma_user_mmap_entry_insert(struct erdma_ucontext *uctx, void *address,
283 u32 size, u8 mmap_flag, u64 *mmap_offset)
284 {
285 struct erdma_user_mmap_entry *entry =
286 kzalloc(sizeof(*entry), GFP_KERNEL);
287 int ret;
288
289 if (!entry)
290 return NULL;
291
292 entry->address = (u64)address;
293 entry->mmap_flag = mmap_flag;
294
295 size = PAGE_ALIGN(size);
296
297 ret = rdma_user_mmap_entry_insert(&uctx->ibucontext, &entry->rdma_entry,
298 size);
299 if (ret) {
300 kfree(entry);
301 return NULL;
302 }
303
304 *mmap_offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
305
306 return &entry->rdma_entry;
307 }
308
erdma_query_device(struct ib_device * ibdev,struct ib_device_attr * attr,struct ib_udata * unused)309 int erdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr,
310 struct ib_udata *unused)
311 {
312 struct erdma_dev *dev = to_edev(ibdev);
313
314 memset(attr, 0, sizeof(*attr));
315
316 attr->max_mr_size = dev->attrs.max_mr_size;
317 attr->vendor_id = PCI_VENDOR_ID_ALIBABA;
318 attr->vendor_part_id = dev->pdev->device;
319 attr->hw_ver = dev->pdev->revision;
320 attr->max_qp = dev->attrs.max_qp - 1;
321 attr->max_qp_wr = min(dev->attrs.max_send_wr, dev->attrs.max_recv_wr);
322 attr->max_qp_rd_atom = dev->attrs.max_ord;
323 attr->max_qp_init_rd_atom = dev->attrs.max_ird;
324 attr->max_res_rd_atom = dev->attrs.max_qp * dev->attrs.max_ird;
325 attr->device_cap_flags = IB_DEVICE_MEM_MGT_EXTENSIONS;
326 attr->kernel_cap_flags = IBK_LOCAL_DMA_LKEY;
327 ibdev->local_dma_lkey = dev->attrs.local_dma_key;
328 attr->max_send_sge = dev->attrs.max_send_sge;
329 attr->max_recv_sge = dev->attrs.max_recv_sge;
330 attr->max_sge_rd = dev->attrs.max_sge_rd;
331 attr->max_cq = dev->attrs.max_cq - 1;
332 attr->max_cqe = dev->attrs.max_cqe;
333 attr->max_mr = dev->attrs.max_mr;
334 attr->max_pd = dev->attrs.max_pd;
335 attr->max_mw = dev->attrs.max_mw;
336 attr->max_fast_reg_page_list_len = ERDMA_MAX_FRMR_PA;
337 attr->page_size_cap = ERDMA_PAGE_SIZE_SUPPORT;
338
339 if (dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_ATOMIC)
340 attr->atomic_cap = IB_ATOMIC_GLOB;
341
342 attr->fw_ver = dev->attrs.fw_version;
343
344 if (dev->netdev)
345 addrconf_addr_eui48((u8 *)&attr->sys_image_guid,
346 dev->netdev->dev_addr);
347
348 return 0;
349 }
350
erdma_query_gid(struct ib_device * ibdev,u32 port,int idx,union ib_gid * gid)351 int erdma_query_gid(struct ib_device *ibdev, u32 port, int idx,
352 union ib_gid *gid)
353 {
354 struct erdma_dev *dev = to_edev(ibdev);
355
356 memset(gid, 0, sizeof(*gid));
357 ether_addr_copy(gid->raw, dev->attrs.peer_addr);
358
359 return 0;
360 }
361
erdma_query_port(struct ib_device * ibdev,u32 port,struct ib_port_attr * attr)362 int erdma_query_port(struct ib_device *ibdev, u32 port,
363 struct ib_port_attr *attr)
364 {
365 struct erdma_dev *dev = to_edev(ibdev);
366 struct net_device *ndev = dev->netdev;
367
368 memset(attr, 0, sizeof(*attr));
369
370 attr->gid_tbl_len = 1;
371 attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_DEVICE_MGMT_SUP;
372 attr->max_msg_sz = -1;
373
374 if (!ndev)
375 goto out;
376
377 ib_get_eth_speed(ibdev, port, &attr->active_speed, &attr->active_width);
378 attr->max_mtu = ib_mtu_int_to_enum(ndev->mtu);
379 attr->active_mtu = ib_mtu_int_to_enum(ndev->mtu);
380 if (netif_running(ndev) && netif_carrier_ok(ndev))
381 dev->state = IB_PORT_ACTIVE;
382 else
383 dev->state = IB_PORT_DOWN;
384 attr->state = dev->state;
385
386 out:
387 if (dev->state == IB_PORT_ACTIVE)
388 attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
389 else
390 attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
391
392 return 0;
393 }
394
erdma_get_port_immutable(struct ib_device * ibdev,u32 port,struct ib_port_immutable * port_immutable)395 int erdma_get_port_immutable(struct ib_device *ibdev, u32 port,
396 struct ib_port_immutable *port_immutable)
397 {
398 port_immutable->gid_tbl_len = 1;
399 port_immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
400
401 return 0;
402 }
403
erdma_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)404 int erdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
405 {
406 struct erdma_pd *pd = to_epd(ibpd);
407 struct erdma_dev *dev = to_edev(ibpd->device);
408 int pdn;
409
410 pdn = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_PD]);
411 if (pdn < 0)
412 return pdn;
413
414 pd->pdn = pdn;
415
416 return 0;
417 }
418
erdma_dealloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)419 int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
420 {
421 struct erdma_pd *pd = to_epd(ibpd);
422 struct erdma_dev *dev = to_edev(ibpd->device);
423
424 erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_PD], pd->pdn);
425
426 return 0;
427 }
428
erdma_flush_worker(struct work_struct * work)429 static void erdma_flush_worker(struct work_struct *work)
430 {
431 struct delayed_work *dwork = to_delayed_work(work);
432 struct erdma_qp *qp =
433 container_of(dwork, struct erdma_qp, reflush_dwork);
434 struct erdma_cmdq_reflush_req req;
435
436 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
437 CMDQ_OPCODE_REFLUSH);
438 req.qpn = QP_ID(qp);
439 req.sq_pi = qp->kern_qp.sq_pi;
440 req.rq_pi = qp->kern_qp.rq_pi;
441 erdma_post_cmd_wait(&qp->dev->cmdq, &req, sizeof(req), NULL, NULL);
442 }
443
erdma_qp_validate_cap(struct erdma_dev * dev,struct ib_qp_init_attr * attrs)444 static int erdma_qp_validate_cap(struct erdma_dev *dev,
445 struct ib_qp_init_attr *attrs)
446 {
447 if ((attrs->cap.max_send_wr > dev->attrs.max_send_wr) ||
448 (attrs->cap.max_recv_wr > dev->attrs.max_recv_wr) ||
449 (attrs->cap.max_send_sge > dev->attrs.max_send_sge) ||
450 (attrs->cap.max_recv_sge > dev->attrs.max_recv_sge) ||
451 (attrs->cap.max_inline_data > ERDMA_MAX_INLINE) ||
452 !attrs->cap.max_send_wr || !attrs->cap.max_recv_wr) {
453 return -EINVAL;
454 }
455
456 return 0;
457 }
458
erdma_qp_validate_attr(struct erdma_dev * dev,struct ib_qp_init_attr * attrs)459 static int erdma_qp_validate_attr(struct erdma_dev *dev,
460 struct ib_qp_init_attr *attrs)
461 {
462 if (attrs->qp_type != IB_QPT_RC)
463 return -EOPNOTSUPP;
464
465 if (attrs->srq)
466 return -EOPNOTSUPP;
467
468 if (!attrs->send_cq || !attrs->recv_cq)
469 return -EOPNOTSUPP;
470
471 return 0;
472 }
473
free_kernel_qp(struct erdma_qp * qp)474 static void free_kernel_qp(struct erdma_qp *qp)
475 {
476 struct erdma_dev *dev = qp->dev;
477
478 vfree(qp->kern_qp.swr_tbl);
479 vfree(qp->kern_qp.rwr_tbl);
480
481 if (qp->kern_qp.sq_buf)
482 dma_free_coherent(&dev->pdev->dev,
483 qp->attrs.sq_size << SQEBB_SHIFT,
484 qp->kern_qp.sq_buf,
485 qp->kern_qp.sq_buf_dma_addr);
486
487 if (qp->kern_qp.sq_dbrec)
488 dma_pool_free(dev->db_pool, qp->kern_qp.sq_dbrec,
489 qp->kern_qp.sq_dbrec_dma);
490
491 if (qp->kern_qp.rq_buf)
492 dma_free_coherent(&dev->pdev->dev,
493 qp->attrs.rq_size << RQE_SHIFT,
494 qp->kern_qp.rq_buf,
495 qp->kern_qp.rq_buf_dma_addr);
496
497 if (qp->kern_qp.rq_dbrec)
498 dma_pool_free(dev->db_pool, qp->kern_qp.rq_dbrec,
499 qp->kern_qp.rq_dbrec_dma);
500 }
501
init_kernel_qp(struct erdma_dev * dev,struct erdma_qp * qp,struct ib_qp_init_attr * attrs)502 static int init_kernel_qp(struct erdma_dev *dev, struct erdma_qp *qp,
503 struct ib_qp_init_attr *attrs)
504 {
505 struct erdma_kqp *kqp = &qp->kern_qp;
506 int size;
507
508 if (attrs->sq_sig_type == IB_SIGNAL_ALL_WR)
509 kqp->sig_all = 1;
510
511 kqp->sq_pi = 0;
512 kqp->sq_ci = 0;
513 kqp->rq_pi = 0;
514 kqp->rq_ci = 0;
515 kqp->hw_sq_db =
516 dev->func_bar + (ERDMA_SDB_SHARED_PAGE_INDEX << PAGE_SHIFT);
517 kqp->hw_rq_db = dev->func_bar + ERDMA_BAR_RQDB_SPACE_OFFSET;
518
519 kqp->swr_tbl = vmalloc_array(qp->attrs.sq_size, sizeof(u64));
520 kqp->rwr_tbl = vmalloc_array(qp->attrs.rq_size, sizeof(u64));
521 if (!kqp->swr_tbl || !kqp->rwr_tbl)
522 goto err_out;
523
524 size = qp->attrs.sq_size << SQEBB_SHIFT;
525 kqp->sq_buf = dma_alloc_coherent(&dev->pdev->dev, size,
526 &kqp->sq_buf_dma_addr, GFP_KERNEL);
527 if (!kqp->sq_buf)
528 goto err_out;
529
530 kqp->sq_dbrec =
531 dma_pool_zalloc(dev->db_pool, GFP_KERNEL, &kqp->sq_dbrec_dma);
532 if (!kqp->sq_dbrec)
533 goto err_out;
534
535 size = qp->attrs.rq_size << RQE_SHIFT;
536 kqp->rq_buf = dma_alloc_coherent(&dev->pdev->dev, size,
537 &kqp->rq_buf_dma_addr, GFP_KERNEL);
538 if (!kqp->rq_buf)
539 goto err_out;
540
541 kqp->rq_dbrec =
542 dma_pool_zalloc(dev->db_pool, GFP_KERNEL, &kqp->rq_dbrec_dma);
543 if (!kqp->rq_dbrec)
544 goto err_out;
545
546 return 0;
547
548 err_out:
549 free_kernel_qp(qp);
550 return -ENOMEM;
551 }
552
erdma_fill_bottom_mtt(struct erdma_dev * dev,struct erdma_mem * mem)553 static void erdma_fill_bottom_mtt(struct erdma_dev *dev, struct erdma_mem *mem)
554 {
555 struct erdma_mtt *mtt = mem->mtt;
556 struct ib_block_iter biter;
557 u32 idx = 0;
558
559 while (mtt->low_level)
560 mtt = mtt->low_level;
561
562 rdma_umem_for_each_dma_block(mem->umem, &biter, mem->page_size)
563 mtt->buf[idx++] = rdma_block_iter_dma_address(&biter);
564 }
565
erdma_create_cont_mtt(struct erdma_dev * dev,size_t size)566 static struct erdma_mtt *erdma_create_cont_mtt(struct erdma_dev *dev,
567 size_t size)
568 {
569 struct erdma_mtt *mtt;
570
571 mtt = kzalloc(sizeof(*mtt), GFP_KERNEL);
572 if (!mtt)
573 return ERR_PTR(-ENOMEM);
574
575 mtt->size = size;
576 mtt->buf = kzalloc(mtt->size, GFP_KERNEL);
577 if (!mtt->buf)
578 goto err_free_mtt;
579
580 mtt->continuous = true;
581 mtt->buf_dma = dma_map_single(&dev->pdev->dev, mtt->buf, mtt->size,
582 DMA_TO_DEVICE);
583 if (dma_mapping_error(&dev->pdev->dev, mtt->buf_dma))
584 goto err_free_mtt_buf;
585
586 return mtt;
587
588 err_free_mtt_buf:
589 kfree(mtt->buf);
590
591 err_free_mtt:
592 kfree(mtt);
593
594 return ERR_PTR(-ENOMEM);
595 }
596
erdma_destroy_mtt_buf_sg(struct erdma_dev * dev,struct erdma_mtt * mtt)597 static void erdma_destroy_mtt_buf_sg(struct erdma_dev *dev,
598 struct erdma_mtt *mtt)
599 {
600 dma_unmap_sg(&dev->pdev->dev, mtt->sglist, mtt->nsg, DMA_TO_DEVICE);
601 vfree(mtt->sglist);
602 }
603
erdma_destroy_scatter_mtt(struct erdma_dev * dev,struct erdma_mtt * mtt)604 static void erdma_destroy_scatter_mtt(struct erdma_dev *dev,
605 struct erdma_mtt *mtt)
606 {
607 erdma_destroy_mtt_buf_sg(dev, mtt);
608 vfree(mtt->buf);
609 kfree(mtt);
610 }
611
erdma_init_middle_mtt(struct erdma_mtt * mtt,struct erdma_mtt * low_mtt)612 static void erdma_init_middle_mtt(struct erdma_mtt *mtt,
613 struct erdma_mtt *low_mtt)
614 {
615 struct scatterlist *sg;
616 u32 idx = 0, i;
617
618 for_each_sg(low_mtt->sglist, sg, low_mtt->nsg, i)
619 mtt->buf[idx++] = sg_dma_address(sg);
620 }
621
erdma_create_mtt_buf_sg(struct erdma_dev * dev,struct erdma_mtt * mtt)622 static int erdma_create_mtt_buf_sg(struct erdma_dev *dev, struct erdma_mtt *mtt)
623 {
624 struct scatterlist *sglist;
625 void *buf = mtt->buf;
626 u32 npages, i, nsg;
627 struct page *pg;
628
629 /* Failed if buf is not page aligned */
630 if ((uintptr_t)buf & ~PAGE_MASK)
631 return -EINVAL;
632
633 npages = DIV_ROUND_UP(mtt->size, PAGE_SIZE);
634 sglist = vzalloc(npages * sizeof(*sglist));
635 if (!sglist)
636 return -ENOMEM;
637
638 sg_init_table(sglist, npages);
639 for (i = 0; i < npages; i++) {
640 pg = vmalloc_to_page(buf);
641 if (!pg)
642 goto err;
643 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
644 buf += PAGE_SIZE;
645 }
646
647 nsg = dma_map_sg(&dev->pdev->dev, sglist, npages, DMA_TO_DEVICE);
648 if (!nsg)
649 goto err;
650
651 mtt->sglist = sglist;
652 mtt->nsg = nsg;
653
654 return 0;
655 err:
656 vfree(sglist);
657
658 return -ENOMEM;
659 }
660
erdma_create_scatter_mtt(struct erdma_dev * dev,size_t size)661 static struct erdma_mtt *erdma_create_scatter_mtt(struct erdma_dev *dev,
662 size_t size)
663 {
664 struct erdma_mtt *mtt;
665 int ret = -ENOMEM;
666
667 mtt = kzalloc(sizeof(*mtt), GFP_KERNEL);
668 if (!mtt)
669 return ERR_PTR(-ENOMEM);
670
671 mtt->size = ALIGN(size, PAGE_SIZE);
672 mtt->buf = vzalloc(mtt->size);
673 mtt->continuous = false;
674 if (!mtt->buf)
675 goto err_free_mtt;
676
677 ret = erdma_create_mtt_buf_sg(dev, mtt);
678 if (ret)
679 goto err_free_mtt_buf;
680
681 ibdev_dbg(&dev->ibdev, "create scatter mtt, size:%lu, nsg:%u\n",
682 mtt->size, mtt->nsg);
683
684 return mtt;
685
686 err_free_mtt_buf:
687 vfree(mtt->buf);
688
689 err_free_mtt:
690 kfree(mtt);
691
692 return ERR_PTR(ret);
693 }
694
erdma_create_mtt(struct erdma_dev * dev,size_t size,bool force_continuous)695 static struct erdma_mtt *erdma_create_mtt(struct erdma_dev *dev, size_t size,
696 bool force_continuous)
697 {
698 struct erdma_mtt *mtt, *tmp_mtt;
699 int ret, level = 0;
700
701 ibdev_dbg(&dev->ibdev, "create_mtt, size:%lu, force cont:%d\n", size,
702 force_continuous);
703
704 if (!(dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_MTT_VA))
705 force_continuous = true;
706
707 if (force_continuous)
708 return erdma_create_cont_mtt(dev, size);
709
710 mtt = erdma_create_scatter_mtt(dev, size);
711 if (IS_ERR(mtt))
712 return mtt;
713 level = 1;
714
715 /* convergence the mtt table. */
716 while (mtt->nsg != 1 && level <= 3) {
717 tmp_mtt = erdma_create_scatter_mtt(dev, MTT_SIZE(mtt->nsg));
718 if (IS_ERR(tmp_mtt)) {
719 ret = PTR_ERR(tmp_mtt);
720 goto err_free_mtt;
721 }
722 erdma_init_middle_mtt(tmp_mtt, mtt);
723 tmp_mtt->low_level = mtt;
724 mtt = tmp_mtt;
725 level++;
726 }
727
728 if (level > 3) {
729 ret = -ENOMEM;
730 goto err_free_mtt;
731 }
732
733 mtt->level = level;
734 ibdev_dbg(&dev->ibdev, "top mtt: level:%d, dma_addr 0x%llx\n",
735 mtt->level, mtt->sglist[0].dma_address);
736
737 return mtt;
738 err_free_mtt:
739 while (mtt) {
740 tmp_mtt = mtt->low_level;
741 erdma_destroy_scatter_mtt(dev, mtt);
742 mtt = tmp_mtt;
743 }
744
745 return ERR_PTR(ret);
746 }
747
erdma_destroy_mtt(struct erdma_dev * dev,struct erdma_mtt * mtt)748 static void erdma_destroy_mtt(struct erdma_dev *dev, struct erdma_mtt *mtt)
749 {
750 struct erdma_mtt *tmp_mtt;
751
752 if (mtt->continuous) {
753 dma_unmap_single(&dev->pdev->dev, mtt->buf_dma, mtt->size,
754 DMA_TO_DEVICE);
755 kfree(mtt->buf);
756 kfree(mtt);
757 } else {
758 while (mtt) {
759 tmp_mtt = mtt->low_level;
760 erdma_destroy_scatter_mtt(dev, mtt);
761 mtt = tmp_mtt;
762 }
763 }
764 }
765
get_mtt_entries(struct erdma_dev * dev,struct erdma_mem * mem,u64 start,u64 len,int access,u64 virt,unsigned long req_page_size,bool force_continuous)766 static int get_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem,
767 u64 start, u64 len, int access, u64 virt,
768 unsigned long req_page_size, bool force_continuous)
769 {
770 int ret = 0;
771
772 mem->umem = ib_umem_get(&dev->ibdev, start, len, access);
773 if (IS_ERR(mem->umem)) {
774 ret = PTR_ERR(mem->umem);
775 mem->umem = NULL;
776 return ret;
777 }
778
779 mem->va = virt;
780 mem->len = len;
781 mem->page_size = ib_umem_find_best_pgsz(mem->umem, req_page_size, virt);
782 mem->page_offset = start & (mem->page_size - 1);
783 mem->mtt_nents = ib_umem_num_dma_blocks(mem->umem, mem->page_size);
784 mem->page_cnt = mem->mtt_nents;
785 mem->mtt = erdma_create_mtt(dev, MTT_SIZE(mem->page_cnt),
786 force_continuous);
787 if (IS_ERR(mem->mtt)) {
788 ret = PTR_ERR(mem->mtt);
789 goto error_ret;
790 }
791
792 erdma_fill_bottom_mtt(dev, mem);
793
794 return 0;
795
796 error_ret:
797 if (mem->umem) {
798 ib_umem_release(mem->umem);
799 mem->umem = NULL;
800 }
801
802 return ret;
803 }
804
put_mtt_entries(struct erdma_dev * dev,struct erdma_mem * mem)805 static void put_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem)
806 {
807 if (mem->mtt)
808 erdma_destroy_mtt(dev, mem->mtt);
809
810 if (mem->umem) {
811 ib_umem_release(mem->umem);
812 mem->umem = NULL;
813 }
814 }
815
erdma_map_user_dbrecords(struct erdma_ucontext * ctx,u64 dbrecords_va,struct erdma_user_dbrecords_page ** dbr_page,dma_addr_t * dma_addr)816 static int erdma_map_user_dbrecords(struct erdma_ucontext *ctx,
817 u64 dbrecords_va,
818 struct erdma_user_dbrecords_page **dbr_page,
819 dma_addr_t *dma_addr)
820 {
821 struct erdma_user_dbrecords_page *page = NULL;
822 int rv = 0;
823
824 mutex_lock(&ctx->dbrecords_page_mutex);
825
826 list_for_each_entry(page, &ctx->dbrecords_page_list, list)
827 if (page->va == (dbrecords_va & PAGE_MASK))
828 goto found;
829
830 page = kmalloc(sizeof(*page), GFP_KERNEL);
831 if (!page) {
832 rv = -ENOMEM;
833 goto out;
834 }
835
836 page->va = (dbrecords_va & PAGE_MASK);
837 page->refcnt = 0;
838
839 page->umem = ib_umem_get(ctx->ibucontext.device,
840 dbrecords_va & PAGE_MASK, PAGE_SIZE, 0);
841 if (IS_ERR(page->umem)) {
842 rv = PTR_ERR(page->umem);
843 kfree(page);
844 goto out;
845 }
846
847 list_add(&page->list, &ctx->dbrecords_page_list);
848
849 found:
850 *dma_addr = sg_dma_address(page->umem->sgt_append.sgt.sgl) +
851 (dbrecords_va & ~PAGE_MASK);
852 *dbr_page = page;
853 page->refcnt++;
854
855 out:
856 mutex_unlock(&ctx->dbrecords_page_mutex);
857 return rv;
858 }
859
860 static void
erdma_unmap_user_dbrecords(struct erdma_ucontext * ctx,struct erdma_user_dbrecords_page ** dbr_page)861 erdma_unmap_user_dbrecords(struct erdma_ucontext *ctx,
862 struct erdma_user_dbrecords_page **dbr_page)
863 {
864 if (!ctx || !(*dbr_page))
865 return;
866
867 mutex_lock(&ctx->dbrecords_page_mutex);
868 if (--(*dbr_page)->refcnt == 0) {
869 list_del(&(*dbr_page)->list);
870 ib_umem_release((*dbr_page)->umem);
871 kfree(*dbr_page);
872 }
873
874 *dbr_page = NULL;
875 mutex_unlock(&ctx->dbrecords_page_mutex);
876 }
877
init_user_qp(struct erdma_qp * qp,struct erdma_ucontext * uctx,u64 va,u32 len,u64 dbrec_va)878 static int init_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx,
879 u64 va, u32 len, u64 dbrec_va)
880 {
881 dma_addr_t dbrec_dma;
882 u32 rq_offset;
883 int ret;
884
885 if (len < (ALIGN(qp->attrs.sq_size * SQEBB_SIZE, ERDMA_HW_PAGE_SIZE) +
886 qp->attrs.rq_size * RQE_SIZE))
887 return -EINVAL;
888
889 ret = get_mtt_entries(qp->dev, &qp->user_qp.sq_mem, va,
890 qp->attrs.sq_size << SQEBB_SHIFT, 0, va,
891 (SZ_1M - SZ_4K), true);
892 if (ret)
893 return ret;
894
895 rq_offset = ALIGN(qp->attrs.sq_size << SQEBB_SHIFT, ERDMA_HW_PAGE_SIZE);
896 qp->user_qp.rq_offset = rq_offset;
897
898 ret = get_mtt_entries(qp->dev, &qp->user_qp.rq_mem, va + rq_offset,
899 qp->attrs.rq_size << RQE_SHIFT, 0, va + rq_offset,
900 (SZ_1M - SZ_4K), true);
901 if (ret)
902 goto put_sq_mtt;
903
904 ret = erdma_map_user_dbrecords(uctx, dbrec_va,
905 &qp->user_qp.user_dbr_page,
906 &dbrec_dma);
907 if (ret)
908 goto put_rq_mtt;
909
910 qp->user_qp.sq_dbrec_dma = dbrec_dma;
911 qp->user_qp.rq_dbrec_dma = dbrec_dma + ERDMA_DB_SIZE;
912
913 return 0;
914
915 put_rq_mtt:
916 put_mtt_entries(qp->dev, &qp->user_qp.rq_mem);
917
918 put_sq_mtt:
919 put_mtt_entries(qp->dev, &qp->user_qp.sq_mem);
920
921 return ret;
922 }
923
free_user_qp(struct erdma_qp * qp,struct erdma_ucontext * uctx)924 static void free_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx)
925 {
926 put_mtt_entries(qp->dev, &qp->user_qp.sq_mem);
927 put_mtt_entries(qp->dev, &qp->user_qp.rq_mem);
928 erdma_unmap_user_dbrecords(uctx, &qp->user_qp.user_dbr_page);
929 }
930
erdma_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * attrs,struct ib_udata * udata)931 int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attrs,
932 struct ib_udata *udata)
933 {
934 struct erdma_qp *qp = to_eqp(ibqp);
935 struct erdma_dev *dev = to_edev(ibqp->device);
936 struct erdma_ucontext *uctx = rdma_udata_to_drv_context(
937 udata, struct erdma_ucontext, ibucontext);
938 struct erdma_ureq_create_qp ureq;
939 struct erdma_uresp_create_qp uresp;
940 int ret;
941
942 ret = erdma_qp_validate_cap(dev, attrs);
943 if (ret)
944 goto err_out;
945
946 ret = erdma_qp_validate_attr(dev, attrs);
947 if (ret)
948 goto err_out;
949
950 qp->scq = to_ecq(attrs->send_cq);
951 qp->rcq = to_ecq(attrs->recv_cq);
952 qp->dev = dev;
953 qp->attrs.cc = dev->attrs.cc;
954
955 init_rwsem(&qp->state_lock);
956 kref_init(&qp->ref);
957 init_completion(&qp->safe_free);
958
959 ret = xa_alloc_cyclic(&dev->qp_xa, &qp->ibqp.qp_num, qp,
960 XA_LIMIT(1, dev->attrs.max_qp - 1),
961 &dev->next_alloc_qpn, GFP_KERNEL);
962 if (ret < 0) {
963 ret = -ENOMEM;
964 goto err_out;
965 }
966
967 qp->attrs.sq_size = roundup_pow_of_two(attrs->cap.max_send_wr *
968 ERDMA_MAX_WQEBB_PER_SQE);
969 qp->attrs.rq_size = roundup_pow_of_two(attrs->cap.max_recv_wr);
970
971 if (uctx) {
972 ret = ib_copy_from_udata(&ureq, udata,
973 min(sizeof(ureq), udata->inlen));
974 if (ret)
975 goto err_out_xa;
976
977 ret = init_user_qp(qp, uctx, ureq.qbuf_va, ureq.qbuf_len,
978 ureq.db_record_va);
979 if (ret)
980 goto err_out_xa;
981
982 memset(&uresp, 0, sizeof(uresp));
983
984 uresp.num_sqe = qp->attrs.sq_size;
985 uresp.num_rqe = qp->attrs.rq_size;
986 uresp.qp_id = QP_ID(qp);
987 uresp.rq_offset = qp->user_qp.rq_offset;
988
989 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
990 if (ret)
991 goto err_out_cmd;
992 } else {
993 init_kernel_qp(dev, qp, attrs);
994 }
995
996 qp->attrs.max_send_sge = attrs->cap.max_send_sge;
997 qp->attrs.max_recv_sge = attrs->cap.max_recv_sge;
998 qp->attrs.state = ERDMA_QP_STATE_IDLE;
999 INIT_DELAYED_WORK(&qp->reflush_dwork, erdma_flush_worker);
1000
1001 ret = create_qp_cmd(uctx, qp);
1002 if (ret)
1003 goto err_out_cmd;
1004
1005 spin_lock_init(&qp->lock);
1006
1007 return 0;
1008
1009 err_out_cmd:
1010 if (uctx)
1011 free_user_qp(qp, uctx);
1012 else
1013 free_kernel_qp(qp);
1014 err_out_xa:
1015 xa_erase(&dev->qp_xa, QP_ID(qp));
1016 err_out:
1017 return ret;
1018 }
1019
erdma_create_stag(struct erdma_dev * dev,u32 * stag)1020 static int erdma_create_stag(struct erdma_dev *dev, u32 *stag)
1021 {
1022 int stag_idx;
1023
1024 stag_idx = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX]);
1025 if (stag_idx < 0)
1026 return stag_idx;
1027
1028 /* For now, we always let key field be zero. */
1029 *stag = (stag_idx << 8);
1030
1031 return 0;
1032 }
1033
erdma_get_dma_mr(struct ib_pd * ibpd,int acc)1034 struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int acc)
1035 {
1036 struct erdma_dev *dev = to_edev(ibpd->device);
1037 struct erdma_mr *mr;
1038 u32 stag;
1039 int ret;
1040
1041 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1042 if (!mr)
1043 return ERR_PTR(-ENOMEM);
1044
1045 ret = erdma_create_stag(dev, &stag);
1046 if (ret)
1047 goto out_free;
1048
1049 mr->type = ERDMA_MR_TYPE_DMA;
1050
1051 mr->ibmr.lkey = stag;
1052 mr->ibmr.rkey = stag;
1053 mr->ibmr.pd = ibpd;
1054 mr->access = ERDMA_MR_ACC_LR | to_erdma_access_flags(acc);
1055 ret = regmr_cmd(dev, mr);
1056 if (ret)
1057 goto out_remove_stag;
1058
1059 return &mr->ibmr;
1060
1061 out_remove_stag:
1062 erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX],
1063 mr->ibmr.lkey >> 8);
1064
1065 out_free:
1066 kfree(mr);
1067
1068 return ERR_PTR(ret);
1069 }
1070
erdma_ib_alloc_mr(struct ib_pd * ibpd,enum ib_mr_type mr_type,u32 max_num_sg)1071 struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
1072 u32 max_num_sg)
1073 {
1074 struct erdma_mr *mr;
1075 struct erdma_dev *dev = to_edev(ibpd->device);
1076 int ret;
1077 u32 stag;
1078
1079 if (mr_type != IB_MR_TYPE_MEM_REG)
1080 return ERR_PTR(-EOPNOTSUPP);
1081
1082 if (max_num_sg > ERDMA_MR_MAX_MTT_CNT)
1083 return ERR_PTR(-EINVAL);
1084
1085 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1086 if (!mr)
1087 return ERR_PTR(-ENOMEM);
1088
1089 ret = erdma_create_stag(dev, &stag);
1090 if (ret)
1091 goto out_free;
1092
1093 mr->type = ERDMA_MR_TYPE_FRMR;
1094
1095 mr->ibmr.lkey = stag;
1096 mr->ibmr.rkey = stag;
1097 mr->ibmr.pd = ibpd;
1098 /* update it in FRMR. */
1099 mr->access = ERDMA_MR_ACC_LR | ERDMA_MR_ACC_LW | ERDMA_MR_ACC_RR |
1100 ERDMA_MR_ACC_RW;
1101
1102 mr->mem.page_size = PAGE_SIZE; /* update it later. */
1103 mr->mem.page_cnt = max_num_sg;
1104 mr->mem.mtt = erdma_create_mtt(dev, MTT_SIZE(max_num_sg), true);
1105 if (IS_ERR(mr->mem.mtt)) {
1106 ret = PTR_ERR(mr->mem.mtt);
1107 goto out_remove_stag;
1108 }
1109
1110 ret = regmr_cmd(dev, mr);
1111 if (ret)
1112 goto out_destroy_mtt;
1113
1114 return &mr->ibmr;
1115
1116 out_destroy_mtt:
1117 erdma_destroy_mtt(dev, mr->mem.mtt);
1118
1119 out_remove_stag:
1120 erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX],
1121 mr->ibmr.lkey >> 8);
1122
1123 out_free:
1124 kfree(mr);
1125
1126 return ERR_PTR(ret);
1127 }
1128
erdma_set_page(struct ib_mr * ibmr,u64 addr)1129 static int erdma_set_page(struct ib_mr *ibmr, u64 addr)
1130 {
1131 struct erdma_mr *mr = to_emr(ibmr);
1132
1133 if (mr->mem.mtt_nents >= mr->mem.page_cnt)
1134 return -1;
1135
1136 mr->mem.mtt->buf[mr->mem.mtt_nents] = addr;
1137 mr->mem.mtt_nents++;
1138
1139 return 0;
1140 }
1141
erdma_map_mr_sg(struct ib_mr * ibmr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset)1142 int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
1143 unsigned int *sg_offset)
1144 {
1145 struct erdma_mr *mr = to_emr(ibmr);
1146 int num;
1147
1148 mr->mem.mtt_nents = 0;
1149
1150 num = ib_sg_to_pages(&mr->ibmr, sg, sg_nents, sg_offset,
1151 erdma_set_page);
1152
1153 return num;
1154 }
1155
erdma_reg_user_mr(struct ib_pd * ibpd,u64 start,u64 len,u64 virt,int access,struct ib_udata * udata)1156 struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
1157 u64 virt, int access, struct ib_udata *udata)
1158 {
1159 struct erdma_mr *mr = NULL;
1160 struct erdma_dev *dev = to_edev(ibpd->device);
1161 u32 stag;
1162 int ret;
1163
1164 if (!len || len > dev->attrs.max_mr_size)
1165 return ERR_PTR(-EINVAL);
1166
1167 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1168 if (!mr)
1169 return ERR_PTR(-ENOMEM);
1170
1171 ret = get_mtt_entries(dev, &mr->mem, start, len, access, virt,
1172 SZ_2G - SZ_4K, false);
1173 if (ret)
1174 goto err_out_free;
1175
1176 ret = erdma_create_stag(dev, &stag);
1177 if (ret)
1178 goto err_out_put_mtt;
1179
1180 mr->ibmr.lkey = mr->ibmr.rkey = stag;
1181 mr->ibmr.pd = ibpd;
1182 mr->mem.va = virt;
1183 mr->mem.len = len;
1184 mr->access = ERDMA_MR_ACC_LR | to_erdma_access_flags(access);
1185 mr->valid = 1;
1186 mr->type = ERDMA_MR_TYPE_NORMAL;
1187
1188 ret = regmr_cmd(dev, mr);
1189 if (ret)
1190 goto err_out_mr;
1191
1192 return &mr->ibmr;
1193
1194 err_out_mr:
1195 erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX],
1196 mr->ibmr.lkey >> 8);
1197
1198 err_out_put_mtt:
1199 put_mtt_entries(dev, &mr->mem);
1200
1201 err_out_free:
1202 kfree(mr);
1203
1204 return ERR_PTR(ret);
1205 }
1206
erdma_dereg_mr(struct ib_mr * ibmr,struct ib_udata * udata)1207 int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1208 {
1209 struct erdma_mr *mr;
1210 struct erdma_dev *dev = to_edev(ibmr->device);
1211 struct erdma_cmdq_dereg_mr_req req;
1212 int ret;
1213
1214 mr = to_emr(ibmr);
1215
1216 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
1217 CMDQ_OPCODE_DEREG_MR);
1218
1219 req.cfg = FIELD_PREP(ERDMA_CMD_MR_MPT_IDX_MASK, ibmr->lkey >> 8) |
1220 FIELD_PREP(ERDMA_CMD_MR_KEY_MASK, ibmr->lkey & 0xFF);
1221
1222 ret = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1223 if (ret)
1224 return ret;
1225
1226 erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], ibmr->lkey >> 8);
1227
1228 put_mtt_entries(dev, &mr->mem);
1229
1230 kfree(mr);
1231 return 0;
1232 }
1233
erdma_destroy_cq(struct ib_cq * ibcq,struct ib_udata * udata)1234 int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
1235 {
1236 struct erdma_cq *cq = to_ecq(ibcq);
1237 struct erdma_dev *dev = to_edev(ibcq->device);
1238 struct erdma_ucontext *ctx = rdma_udata_to_drv_context(
1239 udata, struct erdma_ucontext, ibucontext);
1240 int err;
1241 struct erdma_cmdq_destroy_cq_req req;
1242
1243 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
1244 CMDQ_OPCODE_DESTROY_CQ);
1245 req.cqn = cq->cqn;
1246
1247 err = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1248 if (err)
1249 return err;
1250
1251 if (rdma_is_kernel_res(&cq->ibcq.res)) {
1252 dma_free_coherent(&dev->pdev->dev, cq->depth << CQE_SHIFT,
1253 cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr);
1254 dma_pool_free(dev->db_pool, cq->kern_cq.dbrec,
1255 cq->kern_cq.dbrec_dma);
1256 } else {
1257 erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page);
1258 put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
1259 }
1260
1261 xa_erase(&dev->cq_xa, cq->cqn);
1262
1263 return 0;
1264 }
1265
erdma_destroy_qp(struct ib_qp * ibqp,struct ib_udata * udata)1266 int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
1267 {
1268 struct erdma_qp *qp = to_eqp(ibqp);
1269 struct erdma_dev *dev = to_edev(ibqp->device);
1270 struct erdma_ucontext *ctx = rdma_udata_to_drv_context(
1271 udata, struct erdma_ucontext, ibucontext);
1272 struct erdma_qp_attrs qp_attrs;
1273 int err;
1274 struct erdma_cmdq_destroy_qp_req req;
1275
1276 down_write(&qp->state_lock);
1277 qp_attrs.state = ERDMA_QP_STATE_ERROR;
1278 erdma_modify_qp_internal(qp, &qp_attrs, ERDMA_QP_ATTR_STATE);
1279 up_write(&qp->state_lock);
1280
1281 cancel_delayed_work_sync(&qp->reflush_dwork);
1282
1283 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
1284 CMDQ_OPCODE_DESTROY_QP);
1285 req.qpn = QP_ID(qp);
1286
1287 err = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1288 if (err)
1289 return err;
1290
1291 erdma_qp_put(qp);
1292 wait_for_completion(&qp->safe_free);
1293
1294 if (rdma_is_kernel_res(&qp->ibqp.res)) {
1295 free_kernel_qp(qp);
1296 } else {
1297 put_mtt_entries(dev, &qp->user_qp.sq_mem);
1298 put_mtt_entries(dev, &qp->user_qp.rq_mem);
1299 erdma_unmap_user_dbrecords(ctx, &qp->user_qp.user_dbr_page);
1300 }
1301
1302 if (qp->cep)
1303 erdma_cep_put(qp->cep);
1304 xa_erase(&dev->qp_xa, QP_ID(qp));
1305
1306 return 0;
1307 }
1308
erdma_qp_get_ref(struct ib_qp * ibqp)1309 void erdma_qp_get_ref(struct ib_qp *ibqp)
1310 {
1311 erdma_qp_get(to_eqp(ibqp));
1312 }
1313
erdma_qp_put_ref(struct ib_qp * ibqp)1314 void erdma_qp_put_ref(struct ib_qp *ibqp)
1315 {
1316 erdma_qp_put(to_eqp(ibqp));
1317 }
1318
erdma_mmap(struct ib_ucontext * ctx,struct vm_area_struct * vma)1319 int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma)
1320 {
1321 struct rdma_user_mmap_entry *rdma_entry;
1322 struct erdma_user_mmap_entry *entry;
1323 pgprot_t prot;
1324 int err;
1325
1326 rdma_entry = rdma_user_mmap_entry_get(ctx, vma);
1327 if (!rdma_entry)
1328 return -EINVAL;
1329
1330 entry = to_emmap(rdma_entry);
1331
1332 switch (entry->mmap_flag) {
1333 case ERDMA_MMAP_IO_NC:
1334 /* map doorbell. */
1335 prot = pgprot_device(vma->vm_page_prot);
1336 break;
1337 default:
1338 err = -EINVAL;
1339 goto put_entry;
1340 }
1341
1342 err = rdma_user_mmap_io(ctx, vma, PFN_DOWN(entry->address), PAGE_SIZE,
1343 prot, rdma_entry);
1344
1345 put_entry:
1346 rdma_user_mmap_entry_put(rdma_entry);
1347 return err;
1348 }
1349
erdma_mmap_free(struct rdma_user_mmap_entry * rdma_entry)1350 void erdma_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1351 {
1352 struct erdma_user_mmap_entry *entry = to_emmap(rdma_entry);
1353
1354 kfree(entry);
1355 }
1356
alloc_db_resources(struct erdma_dev * dev,struct erdma_ucontext * ctx,bool ext_db_en)1357 static int alloc_db_resources(struct erdma_dev *dev, struct erdma_ucontext *ctx,
1358 bool ext_db_en)
1359 {
1360 struct erdma_cmdq_ext_db_req req = {};
1361 u64 val0, val1;
1362 int ret;
1363
1364 /*
1365 * CAP_SYS_RAWIO is required if hardware does not support extend
1366 * doorbell mechanism.
1367 */
1368 if (!ext_db_en && !capable(CAP_SYS_RAWIO))
1369 return -EPERM;
1370
1371 if (!ext_db_en) {
1372 ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET;
1373 ctx->rdb = dev->func_bar_addr + ERDMA_BAR_RQDB_SPACE_OFFSET;
1374 ctx->cdb = dev->func_bar_addr + ERDMA_BAR_CQDB_SPACE_OFFSET;
1375 return 0;
1376 }
1377
1378 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
1379 CMDQ_OPCODE_ALLOC_DB);
1380
1381 req.cfg = FIELD_PREP(ERDMA_CMD_EXT_DB_CQ_EN_MASK, 1) |
1382 FIELD_PREP(ERDMA_CMD_EXT_DB_RQ_EN_MASK, 1) |
1383 FIELD_PREP(ERDMA_CMD_EXT_DB_SQ_EN_MASK, 1);
1384
1385 ret = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), &val0, &val1);
1386 if (ret)
1387 return ret;
1388
1389 ctx->ext_db.enable = true;
1390 ctx->ext_db.sdb_off = ERDMA_GET(val0, ALLOC_DB_RESP_SDB);
1391 ctx->ext_db.rdb_off = ERDMA_GET(val0, ALLOC_DB_RESP_RDB);
1392 ctx->ext_db.cdb_off = ERDMA_GET(val0, ALLOC_DB_RESP_CDB);
1393
1394 ctx->sdb = dev->func_bar_addr + (ctx->ext_db.sdb_off << PAGE_SHIFT);
1395 ctx->cdb = dev->func_bar_addr + (ctx->ext_db.rdb_off << PAGE_SHIFT);
1396 ctx->rdb = dev->func_bar_addr + (ctx->ext_db.cdb_off << PAGE_SHIFT);
1397
1398 return 0;
1399 }
1400
free_db_resources(struct erdma_dev * dev,struct erdma_ucontext * ctx)1401 static void free_db_resources(struct erdma_dev *dev, struct erdma_ucontext *ctx)
1402 {
1403 struct erdma_cmdq_ext_db_req req = {};
1404 int ret;
1405
1406 if (!ctx->ext_db.enable)
1407 return;
1408
1409 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
1410 CMDQ_OPCODE_FREE_DB);
1411
1412 req.cfg = FIELD_PREP(ERDMA_CMD_EXT_DB_CQ_EN_MASK, 1) |
1413 FIELD_PREP(ERDMA_CMD_EXT_DB_RQ_EN_MASK, 1) |
1414 FIELD_PREP(ERDMA_CMD_EXT_DB_SQ_EN_MASK, 1);
1415
1416 req.sdb_off = ctx->ext_db.sdb_off;
1417 req.rdb_off = ctx->ext_db.rdb_off;
1418 req.cdb_off = ctx->ext_db.cdb_off;
1419
1420 ret = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1421 if (ret)
1422 ibdev_err_ratelimited(&dev->ibdev,
1423 "free db resources failed %d", ret);
1424 }
1425
erdma_uctx_user_mmap_entries_remove(struct erdma_ucontext * uctx)1426 static void erdma_uctx_user_mmap_entries_remove(struct erdma_ucontext *uctx)
1427 {
1428 rdma_user_mmap_entry_remove(uctx->sq_db_mmap_entry);
1429 rdma_user_mmap_entry_remove(uctx->rq_db_mmap_entry);
1430 rdma_user_mmap_entry_remove(uctx->cq_db_mmap_entry);
1431 }
1432
erdma_alloc_ucontext(struct ib_ucontext * ibctx,struct ib_udata * udata)1433 int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata)
1434 {
1435 struct erdma_ucontext *ctx = to_ectx(ibctx);
1436 struct erdma_dev *dev = to_edev(ibctx->device);
1437 int ret;
1438 struct erdma_uresp_alloc_ctx uresp = {};
1439
1440 if (atomic_inc_return(&dev->num_ctx) > ERDMA_MAX_CONTEXT) {
1441 ret = -ENOMEM;
1442 goto err_out;
1443 }
1444
1445 if (udata->outlen < sizeof(uresp)) {
1446 ret = -EINVAL;
1447 goto err_out;
1448 }
1449
1450 INIT_LIST_HEAD(&ctx->dbrecords_page_list);
1451 mutex_init(&ctx->dbrecords_page_mutex);
1452
1453 ret = alloc_db_resources(dev, ctx,
1454 !!(dev->attrs.cap_flags &
1455 ERDMA_DEV_CAP_FLAGS_EXTEND_DB));
1456 if (ret)
1457 goto err_out;
1458
1459 ctx->sq_db_mmap_entry = erdma_user_mmap_entry_insert(
1460 ctx, (void *)ctx->sdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.sdb);
1461 if (!ctx->sq_db_mmap_entry) {
1462 ret = -ENOMEM;
1463 goto err_free_ext_db;
1464 }
1465
1466 ctx->rq_db_mmap_entry = erdma_user_mmap_entry_insert(
1467 ctx, (void *)ctx->rdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.rdb);
1468 if (!ctx->rq_db_mmap_entry) {
1469 ret = -EINVAL;
1470 goto err_put_mmap_entries;
1471 }
1472
1473 ctx->cq_db_mmap_entry = erdma_user_mmap_entry_insert(
1474 ctx, (void *)ctx->cdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.cdb);
1475 if (!ctx->cq_db_mmap_entry) {
1476 ret = -EINVAL;
1477 goto err_put_mmap_entries;
1478 }
1479
1480 uresp.dev_id = dev->pdev->device;
1481
1482 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1483 if (ret)
1484 goto err_put_mmap_entries;
1485
1486 return 0;
1487
1488 err_put_mmap_entries:
1489 erdma_uctx_user_mmap_entries_remove(ctx);
1490
1491 err_free_ext_db:
1492 free_db_resources(dev, ctx);
1493
1494 err_out:
1495 atomic_dec(&dev->num_ctx);
1496 return ret;
1497 }
1498
erdma_dealloc_ucontext(struct ib_ucontext * ibctx)1499 void erdma_dealloc_ucontext(struct ib_ucontext *ibctx)
1500 {
1501 struct erdma_dev *dev = to_edev(ibctx->device);
1502 struct erdma_ucontext *ctx = to_ectx(ibctx);
1503
1504 erdma_uctx_user_mmap_entries_remove(ctx);
1505 free_db_resources(dev, ctx);
1506 atomic_dec(&dev->num_ctx);
1507 }
1508
1509 static int ib_qp_state_to_erdma_qp_state[IB_QPS_ERR + 1] = {
1510 [IB_QPS_RESET] = ERDMA_QP_STATE_IDLE,
1511 [IB_QPS_INIT] = ERDMA_QP_STATE_IDLE,
1512 [IB_QPS_RTR] = ERDMA_QP_STATE_RTR,
1513 [IB_QPS_RTS] = ERDMA_QP_STATE_RTS,
1514 [IB_QPS_SQD] = ERDMA_QP_STATE_CLOSING,
1515 [IB_QPS_SQE] = ERDMA_QP_STATE_TERMINATE,
1516 [IB_QPS_ERR] = ERDMA_QP_STATE_ERROR
1517 };
1518
erdma_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)1519 int erdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1520 struct ib_udata *udata)
1521 {
1522 struct erdma_qp_attrs new_attrs;
1523 enum erdma_qp_attr_mask erdma_attr_mask = 0;
1524 struct erdma_qp *qp = to_eqp(ibqp);
1525 int ret = 0;
1526
1527 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1528 return -EOPNOTSUPP;
1529
1530 memset(&new_attrs, 0, sizeof(new_attrs));
1531
1532 if (attr_mask & IB_QP_STATE) {
1533 new_attrs.state = ib_qp_state_to_erdma_qp_state[attr->qp_state];
1534
1535 erdma_attr_mask |= ERDMA_QP_ATTR_STATE;
1536 }
1537
1538 down_write(&qp->state_lock);
1539
1540 ret = erdma_modify_qp_internal(qp, &new_attrs, erdma_attr_mask);
1541
1542 up_write(&qp->state_lock);
1543
1544 return ret;
1545 }
1546
erdma_query_qp(struct ib_qp * ibqp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)1547 int erdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
1548 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1549 {
1550 struct erdma_qp *qp;
1551 struct erdma_dev *dev;
1552
1553 if (ibqp && qp_attr && qp_init_attr) {
1554 qp = to_eqp(ibqp);
1555 dev = to_edev(ibqp->device);
1556 } else {
1557 return -EINVAL;
1558 }
1559
1560 qp_attr->cap.max_inline_data = ERDMA_MAX_INLINE;
1561 qp_init_attr->cap.max_inline_data = ERDMA_MAX_INLINE;
1562
1563 qp_attr->cap.max_send_wr = qp->attrs.sq_size;
1564 qp_attr->cap.max_recv_wr = qp->attrs.rq_size;
1565 qp_attr->cap.max_send_sge = qp->attrs.max_send_sge;
1566 qp_attr->cap.max_recv_sge = qp->attrs.max_recv_sge;
1567
1568 qp_attr->path_mtu = ib_mtu_int_to_enum(dev->netdev->mtu);
1569 qp_attr->max_rd_atomic = qp->attrs.irq_size;
1570 qp_attr->max_dest_rd_atomic = qp->attrs.orq_size;
1571
1572 qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE |
1573 IB_ACCESS_REMOTE_WRITE |
1574 IB_ACCESS_REMOTE_READ;
1575
1576 qp_init_attr->cap = qp_attr->cap;
1577
1578 return 0;
1579 }
1580
erdma_init_user_cq(struct erdma_ucontext * ctx,struct erdma_cq * cq,struct erdma_ureq_create_cq * ureq)1581 static int erdma_init_user_cq(struct erdma_ucontext *ctx, struct erdma_cq *cq,
1582 struct erdma_ureq_create_cq *ureq)
1583 {
1584 int ret;
1585 struct erdma_dev *dev = to_edev(cq->ibcq.device);
1586
1587 ret = get_mtt_entries(dev, &cq->user_cq.qbuf_mem, ureq->qbuf_va,
1588 ureq->qbuf_len, 0, ureq->qbuf_va, SZ_64M - SZ_4K,
1589 true);
1590 if (ret)
1591 return ret;
1592
1593 ret = erdma_map_user_dbrecords(ctx, ureq->db_record_va,
1594 &cq->user_cq.user_dbr_page,
1595 &cq->user_cq.dbrec_dma);
1596 if (ret)
1597 put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
1598
1599 return ret;
1600 }
1601
erdma_init_kernel_cq(struct erdma_cq * cq)1602 static int erdma_init_kernel_cq(struct erdma_cq *cq)
1603 {
1604 struct erdma_dev *dev = to_edev(cq->ibcq.device);
1605
1606 cq->kern_cq.qbuf =
1607 dma_alloc_coherent(&dev->pdev->dev, cq->depth << CQE_SHIFT,
1608 &cq->kern_cq.qbuf_dma_addr, GFP_KERNEL);
1609 if (!cq->kern_cq.qbuf)
1610 return -ENOMEM;
1611
1612 cq->kern_cq.dbrec = dma_pool_zalloc(dev->db_pool, GFP_KERNEL,
1613 &cq->kern_cq.dbrec_dma);
1614 if (!cq->kern_cq.dbrec)
1615 goto err_out;
1616
1617 spin_lock_init(&cq->kern_cq.lock);
1618 /* use default cqdb addr */
1619 cq->kern_cq.db = dev->func_bar + ERDMA_BAR_CQDB_SPACE_OFFSET;
1620
1621 return 0;
1622
1623 err_out:
1624 dma_free_coherent(&dev->pdev->dev, cq->depth << CQE_SHIFT,
1625 cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr);
1626
1627 return -ENOMEM;
1628 }
1629
erdma_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct uverbs_attr_bundle * attrs)1630 int erdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1631 struct uverbs_attr_bundle *attrs)
1632 {
1633 struct ib_udata *udata = &attrs->driver_udata;
1634 struct erdma_cq *cq = to_ecq(ibcq);
1635 struct erdma_dev *dev = to_edev(ibcq->device);
1636 unsigned int depth = attr->cqe;
1637 int ret;
1638 struct erdma_ucontext *ctx = rdma_udata_to_drv_context(
1639 udata, struct erdma_ucontext, ibucontext);
1640
1641 if (depth > dev->attrs.max_cqe)
1642 return -EINVAL;
1643
1644 depth = roundup_pow_of_two(depth);
1645 cq->ibcq.cqe = depth;
1646 cq->depth = depth;
1647 cq->assoc_eqn = attr->comp_vector + 1;
1648
1649 ret = xa_alloc_cyclic(&dev->cq_xa, &cq->cqn, cq,
1650 XA_LIMIT(1, dev->attrs.max_cq - 1),
1651 &dev->next_alloc_cqn, GFP_KERNEL);
1652 if (ret < 0)
1653 return ret;
1654
1655 if (!rdma_is_kernel_res(&ibcq->res)) {
1656 struct erdma_ureq_create_cq ureq;
1657 struct erdma_uresp_create_cq uresp;
1658
1659 ret = ib_copy_from_udata(&ureq, udata,
1660 min(udata->inlen, sizeof(ureq)));
1661 if (ret)
1662 goto err_out_xa;
1663
1664 ret = erdma_init_user_cq(ctx, cq, &ureq);
1665 if (ret)
1666 goto err_out_xa;
1667
1668 uresp.cq_id = cq->cqn;
1669 uresp.num_cqe = depth;
1670
1671 ret = ib_copy_to_udata(udata, &uresp,
1672 min(sizeof(uresp), udata->outlen));
1673 if (ret)
1674 goto err_free_res;
1675 } else {
1676 ret = erdma_init_kernel_cq(cq);
1677 if (ret)
1678 goto err_out_xa;
1679 }
1680
1681 ret = create_cq_cmd(ctx, cq);
1682 if (ret)
1683 goto err_free_res;
1684
1685 return 0;
1686
1687 err_free_res:
1688 if (!rdma_is_kernel_res(&ibcq->res)) {
1689 erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page);
1690 put_mtt_entries(dev, &cq->user_cq.qbuf_mem);
1691 } else {
1692 dma_free_coherent(&dev->pdev->dev, depth << CQE_SHIFT,
1693 cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr);
1694 dma_pool_free(dev->db_pool, cq->kern_cq.dbrec,
1695 cq->kern_cq.dbrec_dma);
1696 }
1697
1698 err_out_xa:
1699 xa_erase(&dev->cq_xa, cq->cqn);
1700
1701 return ret;
1702 }
1703
erdma_set_mtu(struct erdma_dev * dev,u32 mtu)1704 void erdma_set_mtu(struct erdma_dev *dev, u32 mtu)
1705 {
1706 struct erdma_cmdq_config_mtu_req req;
1707
1708 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
1709 CMDQ_OPCODE_CONF_MTU);
1710 req.mtu = mtu;
1711
1712 erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1713 }
1714
erdma_port_event(struct erdma_dev * dev,enum ib_event_type reason)1715 void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason)
1716 {
1717 struct ib_event event;
1718
1719 event.device = &dev->ibdev;
1720 event.element.port_num = 1;
1721 event.event = reason;
1722
1723 ib_dispatch_event(&event);
1724 }
1725
1726 enum counters {
1727 ERDMA_STATS_TX_REQS_CNT,
1728 ERDMA_STATS_TX_PACKETS_CNT,
1729 ERDMA_STATS_TX_BYTES_CNT,
1730 ERDMA_STATS_TX_DISABLE_DROP_CNT,
1731 ERDMA_STATS_TX_BPS_METER_DROP_CNT,
1732 ERDMA_STATS_TX_PPS_METER_DROP_CNT,
1733
1734 ERDMA_STATS_RX_PACKETS_CNT,
1735 ERDMA_STATS_RX_BYTES_CNT,
1736 ERDMA_STATS_RX_DISABLE_DROP_CNT,
1737 ERDMA_STATS_RX_BPS_METER_DROP_CNT,
1738 ERDMA_STATS_RX_PPS_METER_DROP_CNT,
1739
1740 ERDMA_STATS_MAX
1741 };
1742
1743 static const struct rdma_stat_desc erdma_descs[] = {
1744 [ERDMA_STATS_TX_REQS_CNT].name = "tx_reqs_cnt",
1745 [ERDMA_STATS_TX_PACKETS_CNT].name = "tx_packets_cnt",
1746 [ERDMA_STATS_TX_BYTES_CNT].name = "tx_bytes_cnt",
1747 [ERDMA_STATS_TX_DISABLE_DROP_CNT].name = "tx_disable_drop_cnt",
1748 [ERDMA_STATS_TX_BPS_METER_DROP_CNT].name = "tx_bps_limit_drop_cnt",
1749 [ERDMA_STATS_TX_PPS_METER_DROP_CNT].name = "tx_pps_limit_drop_cnt",
1750 [ERDMA_STATS_RX_PACKETS_CNT].name = "rx_packets_cnt",
1751 [ERDMA_STATS_RX_BYTES_CNT].name = "rx_bytes_cnt",
1752 [ERDMA_STATS_RX_DISABLE_DROP_CNT].name = "rx_disable_drop_cnt",
1753 [ERDMA_STATS_RX_BPS_METER_DROP_CNT].name = "rx_bps_limit_drop_cnt",
1754 [ERDMA_STATS_RX_PPS_METER_DROP_CNT].name = "rx_pps_limit_drop_cnt",
1755 };
1756
erdma_alloc_hw_port_stats(struct ib_device * device,u32 port_num)1757 struct rdma_hw_stats *erdma_alloc_hw_port_stats(struct ib_device *device,
1758 u32 port_num)
1759 {
1760 return rdma_alloc_hw_stats_struct(erdma_descs, ERDMA_STATS_MAX,
1761 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1762 }
1763
erdma_query_hw_stats(struct erdma_dev * dev,struct rdma_hw_stats * stats)1764 static int erdma_query_hw_stats(struct erdma_dev *dev,
1765 struct rdma_hw_stats *stats)
1766 {
1767 struct erdma_cmdq_query_stats_resp *resp;
1768 struct erdma_cmdq_query_req req;
1769 dma_addr_t dma_addr;
1770 int err;
1771
1772 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
1773 CMDQ_OPCODE_GET_STATS);
1774
1775 resp = dma_pool_zalloc(dev->resp_pool, GFP_KERNEL, &dma_addr);
1776 if (!resp)
1777 return -ENOMEM;
1778
1779 req.target_addr = dma_addr;
1780 req.target_length = ERDMA_HW_RESP_SIZE;
1781
1782 err = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
1783 if (err)
1784 goto out;
1785
1786 if (resp->hdr.magic != ERDMA_HW_RESP_MAGIC) {
1787 err = -EINVAL;
1788 goto out;
1789 }
1790
1791 memcpy(&stats->value[0], &resp->tx_req_cnt,
1792 sizeof(u64) * stats->num_counters);
1793
1794 out:
1795 dma_pool_free(dev->resp_pool, resp, dma_addr);
1796
1797 return err;
1798 }
1799
erdma_get_hw_stats(struct ib_device * ibdev,struct rdma_hw_stats * stats,u32 port,int index)1800 int erdma_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1801 u32 port, int index)
1802 {
1803 struct erdma_dev *dev = to_edev(ibdev);
1804 int ret;
1805
1806 if (port == 0)
1807 return 0;
1808
1809 ret = erdma_query_hw_stats(dev, stats);
1810 if (ret)
1811 return ret;
1812
1813 return stats->num_counters;
1814 }
1815