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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / infiniband / hw / efa / efa_verbs.c
bloba8645a40730f31ca0dbee7c1d42a798f7566320e
1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright 2018-2024 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6 #include <linux/dma-buf.h>
7 #include <linux/dma-resv.h>
8 #include <linux/vmalloc.h>
9 #include <linux/log2.h>
10
11 #include <rdma/ib_addr.h>
12 #include <rdma/ib_umem.h>
13 #include <rdma/ib_user_verbs.h>
14 #include <rdma/ib_verbs.h>
15 #include <rdma/uverbs_ioctl.h>
16 #define UVERBS_MODULE_NAME efa_ib
17 #include <rdma/uverbs_named_ioctl.h>
18 #include <rdma/ib_user_ioctl_cmds.h>
19
20 #include "efa.h"
21 #include "efa_io_defs.h"
22
23 enum {
24 EFA_MMAP_DMA_PAGE = 0,
25 EFA_MMAP_IO_WC,
26 EFA_MMAP_IO_NC,
27 };
28
29 struct efa_user_mmap_entry {
30 struct rdma_user_mmap_entry rdma_entry;
31 u64 address;
32 u8 mmap_flag;
33 };
34
35 #define EFA_DEFINE_DEVICE_STATS(op) \
36 op(EFA_SUBMITTED_CMDS, "submitted_cmds") \
37 op(EFA_COMPLETED_CMDS, "completed_cmds") \
38 op(EFA_CMDS_ERR, "cmds_err") \
39 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
40 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
41 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
42 op(EFA_CREATE_QP_ERR, "create_qp_err") \
43 op(EFA_CREATE_CQ_ERR, "create_cq_err") \
44 op(EFA_REG_MR_ERR, "reg_mr_err") \
45 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
46 op(EFA_CREATE_AH_ERR, "create_ah_err") \
47 op(EFA_MMAP_ERR, "mmap_err")
48
49 #define EFA_DEFINE_PORT_STATS(op) \
50 op(EFA_TX_BYTES, "tx_bytes") \
51 op(EFA_TX_PKTS, "tx_pkts") \
52 op(EFA_RX_BYTES, "rx_bytes") \
53 op(EFA_RX_PKTS, "rx_pkts") \
54 op(EFA_RX_DROPS, "rx_drops") \
55 op(EFA_SEND_BYTES, "send_bytes") \
56 op(EFA_SEND_WRS, "send_wrs") \
57 op(EFA_RECV_BYTES, "recv_bytes") \
58 op(EFA_RECV_WRS, "recv_wrs") \
59 op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \
60 op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \
61 op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \
62 op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \
63 op(EFA_RDMA_WRITE_WRS, "rdma_write_wrs") \
64 op(EFA_RDMA_WRITE_BYTES, "rdma_write_bytes") \
65 op(EFA_RDMA_WRITE_WR_ERR, "rdma_write_wr_err") \
66 op(EFA_RDMA_WRITE_RECV_BYTES, "rdma_write_recv_bytes") \
67
68 #define EFA_STATS_ENUM(ename, name) ename,
69 #define EFA_STATS_STR(ename, nam) \
70 [ename].name = nam,
71
72 enum efa_hw_device_stats {
73 EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM)
74 };
75
76 static const struct rdma_stat_desc efa_device_stats_descs[] = {
77 EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR)
78 };
79
80 enum efa_hw_port_stats {
81 EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM)
82 };
83
84 static const struct rdma_stat_desc efa_port_stats_descs[] = {
85 EFA_DEFINE_PORT_STATS(EFA_STATS_STR)
86 };
87
88 #define EFA_DEFAULT_LINK_SPEED_GBPS 100
89
90 #define EFA_CHUNK_PAYLOAD_SHIFT 12
91 #define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
92 #define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
93
94 #define EFA_CHUNK_SHIFT 12
95 #define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
96 #define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
97
98 #define EFA_PTRS_PER_CHUNK \
99 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
100
101 #define EFA_CHUNK_USED_SIZE \
102 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
103
104 struct pbl_chunk {
105 dma_addr_t dma_addr;
106 u64 *buf;
107 u32 length;
108 };
109
110 struct pbl_chunk_list {
111 struct pbl_chunk *chunks;
112 unsigned int size;
113 };
114
115 struct pbl_context {
116 union {
117 struct {
118 dma_addr_t dma_addr;
119 } continuous;
120 struct {
121 u32 pbl_buf_size_in_pages;
122 struct scatterlist *sgl;
123 int sg_dma_cnt;
124 struct pbl_chunk_list chunk_list;
125 } indirect;
126 } phys;
127 u64 *pbl_buf;
128 u32 pbl_buf_size_in_bytes;
129 u8 physically_continuous;
130 };
131
132 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
133 {
134 return container_of(ibdev, struct efa_dev, ibdev);
135 }
136
137 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
138 {
139 return container_of(ibucontext, struct efa_ucontext, ibucontext);
140 }
141
142 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
143 {
144 return container_of(ibpd, struct efa_pd, ibpd);
145 }
146
147 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
148 {
149 return container_of(ibmr, struct efa_mr, ibmr);
150 }
151
152 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
153 {
154 return container_of(ibqp, struct efa_qp, ibqp);
155 }
156
157 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
158 {
159 return container_of(ibcq, struct efa_cq, ibcq);
160 }
161
162 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
163 {
164 return container_of(ibah, struct efa_ah, ibah);
165 }
166
167 static inline struct efa_user_mmap_entry *
168 to_emmap(struct rdma_user_mmap_entry *rdma_entry)
169 {
170 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
171 }
172
173 #define EFA_DEV_CAP(dev, cap) \
174 ((dev)->dev_attr.device_caps & \
175 EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)
176
177 #define is_reserved_cleared(reserved) \
178 !memchr_inv(reserved, 0, sizeof(reserved))
179
180 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
181 size_t size, enum dma_data_direction dir)
182 {
183 void *addr;
184
185 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
186 if (!addr)
187 return NULL;
188
189 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
190 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
191 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
192 free_pages_exact(addr, size);
193 return NULL;
194 }
195
196 return addr;
197 }
198
199 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
200 dma_addr_t dma_addr,
201 size_t size, enum dma_data_direction dir)
202 {
203 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
204 free_pages_exact(cpu_addr, size);
205 }
206
207 int efa_query_device(struct ib_device *ibdev,
208 struct ib_device_attr *props,
209 struct ib_udata *udata)
210 {
211 struct efa_com_get_device_attr_result *dev_attr;
212 struct efa_ibv_ex_query_device_resp resp = {};
213 struct efa_dev *dev = to_edev(ibdev);
214 int err;
215
216 if (udata && udata->inlen &&
217 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
218 ibdev_dbg(ibdev,
219 "Incompatible ABI params, udata not cleared\n");
220 return -EINVAL;
221 }
222
223 dev_attr = &dev->dev_attr;
224
225 memset(props, 0, sizeof(*props));
226 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
227 props->page_size_cap = dev_attr->page_size_cap;
228 props->vendor_id = dev->pdev->vendor;
229 props->vendor_part_id = dev->pdev->device;
230 props->hw_ver = dev->pdev->subsystem_device;
231 props->max_qp = dev_attr->max_qp;
232 props->max_cq = dev_attr->max_cq;
233 props->max_pd = dev_attr->max_pd;
234 props->max_mr = dev_attr->max_mr;
235 props->max_ah = dev_attr->max_ah;
236 props->max_cqe = dev_attr->max_cq_depth;
237 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
238 dev_attr->max_rq_depth);
239 props->max_send_sge = dev_attr->max_sq_sge;
240 props->max_recv_sge = dev_attr->max_rq_sge;
241 props->max_sge_rd = dev_attr->max_wr_rdma_sge;
242 props->max_pkeys = 1;
243
244 if (udata && udata->outlen) {
245 resp.max_sq_sge = dev_attr->max_sq_sge;
246 resp.max_rq_sge = dev_attr->max_rq_sge;
247 resp.max_sq_wr = dev_attr->max_sq_depth;
248 resp.max_rq_wr = dev_attr->max_rq_depth;
249 resp.max_rdma_size = dev_attr->max_rdma_size;
250
251 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID;
252 if (EFA_DEV_CAP(dev, RDMA_READ))
253 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
254
255 if (EFA_DEV_CAP(dev, RNR_RETRY))
256 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
257
258 if (EFA_DEV_CAP(dev, DATA_POLLING_128))
259 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128;
260
261 if (EFA_DEV_CAP(dev, RDMA_WRITE))
262 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_WRITE;
263
264 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))
265 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_UNSOLICITED_WRITE_RECV;
266
267 if (dev->neqs)
268 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS;
269
270 err = ib_copy_to_udata(udata, &resp,
271 min(sizeof(resp), udata->outlen));
272 if (err) {
273 ibdev_dbg(ibdev,
274 "Failed to copy udata for query_device\n");
275 return err;
276 }
277 }
278
279 return 0;
280 }
281
282 static void efa_link_gbps_to_speed_and_width(u16 gbps,
283 enum ib_port_speed *speed,
284 enum ib_port_width *width)
285 {
286 if (gbps >= 400) {
287 *width = IB_WIDTH_8X;
288 *speed = IB_SPEED_HDR;
289 } else if (gbps >= 200) {
290 *width = IB_WIDTH_4X;
291 *speed = IB_SPEED_HDR;
292 } else if (gbps >= 120) {
293 *width = IB_WIDTH_12X;
294 *speed = IB_SPEED_FDR10;
295 } else if (gbps >= 100) {
296 *width = IB_WIDTH_4X;
297 *speed = IB_SPEED_EDR;
298 } else if (gbps >= 60) {
299 *width = IB_WIDTH_12X;
300 *speed = IB_SPEED_DDR;
301 } else if (gbps >= 50) {
302 *width = IB_WIDTH_1X;
303 *speed = IB_SPEED_HDR;
304 } else if (gbps >= 40) {
305 *width = IB_WIDTH_4X;
306 *speed = IB_SPEED_FDR10;
307 } else if (gbps >= 30) {
308 *width = IB_WIDTH_12X;
309 *speed = IB_SPEED_SDR;
310 } else {
311 *width = IB_WIDTH_1X;
312 *speed = IB_SPEED_EDR;
313 }
314 }
315
316 int efa_query_port(struct ib_device *ibdev, u32 port,
317 struct ib_port_attr *props)
318 {
319 struct efa_dev *dev = to_edev(ibdev);
320 enum ib_port_speed link_speed;
321 enum ib_port_width link_width;
322 u16 link_gbps;
323
324 props->lmc = 1;
325
326 props->state = IB_PORT_ACTIVE;
327 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
328 props->gid_tbl_len = 1;
329 props->pkey_tbl_len = 1;
330 link_gbps = dev->dev_attr.max_link_speed_gbps ?: EFA_DEFAULT_LINK_SPEED_GBPS;
331 efa_link_gbps_to_speed_and_width(link_gbps, &link_speed, &link_width);
332 props->active_speed = link_speed;
333 props->active_width = link_width;
334 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
335 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
336 props->max_msg_sz = dev->dev_attr.mtu;
337 props->max_vl_num = 1;
338
339 return 0;
340 }
341
342 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
343 int qp_attr_mask,
344 struct ib_qp_init_attr *qp_init_attr)
345 {
346 struct efa_dev *dev = to_edev(ibqp->device);
347 struct efa_com_query_qp_params params = {};
348 struct efa_com_query_qp_result result;
349 struct efa_qp *qp = to_eqp(ibqp);
350 int err;
351
352 #define EFA_QUERY_QP_SUPP_MASK \
353 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
354 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
355
356 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
357 ibdev_dbg(&dev->ibdev,
358 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
359 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
360 return -EOPNOTSUPP;
361 }
362
363 memset(qp_attr, 0, sizeof(*qp_attr));
364 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
365
366 params.qp_handle = qp->qp_handle;
367 err = efa_com_query_qp(&dev->edev, &params, &result);
368 if (err)
369 return err;
370
371 qp_attr->qp_state = result.qp_state;
372 qp_attr->qkey = result.qkey;
373 qp_attr->sq_psn = result.sq_psn;
374 qp_attr->sq_draining = result.sq_draining;
375 qp_attr->port_num = 1;
376 qp_attr->rnr_retry = result.rnr_retry;
377
378 qp_attr->cap.max_send_wr = qp->max_send_wr;
379 qp_attr->cap.max_recv_wr = qp->max_recv_wr;
380 qp_attr->cap.max_send_sge = qp->max_send_sge;
381 qp_attr->cap.max_recv_sge = qp->max_recv_sge;
382 qp_attr->cap.max_inline_data = qp->max_inline_data;
383
384 qp_init_attr->qp_type = ibqp->qp_type;
385 qp_init_attr->recv_cq = ibqp->recv_cq;
386 qp_init_attr->send_cq = ibqp->send_cq;
387 qp_init_attr->qp_context = ibqp->qp_context;
388 qp_init_attr->cap = qp_attr->cap;
389
390 return 0;
391 }
392
393 int efa_query_gid(struct ib_device *ibdev, u32 port, int index,
394 union ib_gid *gid)
395 {
396 struct efa_dev *dev = to_edev(ibdev);
397
398 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
399
400 return 0;
401 }
402
403 int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
404 u16 *pkey)
405 {
406 if (index > 0)
407 return -EINVAL;
408
409 *pkey = 0xffff;
410 return 0;
411 }
412
413 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
414 {
415 struct efa_com_dealloc_pd_params params = {
416 .pdn = pdn,
417 };
418
419 return efa_com_dealloc_pd(&dev->edev, &params);
420 }
421
422 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
423 {
424 struct efa_dev *dev = to_edev(ibpd->device);
425 struct efa_ibv_alloc_pd_resp resp = {};
426 struct efa_com_alloc_pd_result result;
427 struct efa_pd *pd = to_epd(ibpd);
428 int err;
429
430 if (udata->inlen &&
431 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
432 ibdev_dbg(&dev->ibdev,
433 "Incompatible ABI params, udata not cleared\n");
434 err = -EINVAL;
435 goto err_out;
436 }
437
438 err = efa_com_alloc_pd(&dev->edev, &result);
439 if (err)
440 goto err_out;
441
442 pd->pdn = result.pdn;
443 resp.pdn = result.pdn;
444
445 if (udata->outlen) {
446 err = ib_copy_to_udata(udata, &resp,
447 min(sizeof(resp), udata->outlen));
448 if (err) {
449 ibdev_dbg(&dev->ibdev,
450 "Failed to copy udata for alloc_pd\n");
451 goto err_dealloc_pd;
452 }
453 }
454
455 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
456
457 return 0;
458
459 err_dealloc_pd:
460 efa_pd_dealloc(dev, result.pdn);
461 err_out:
462 atomic64_inc(&dev->stats.alloc_pd_err);
463 return err;
464 }
465
466 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
467 {
468 struct efa_dev *dev = to_edev(ibpd->device);
469 struct efa_pd *pd = to_epd(ibpd);
470
471 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
472 efa_pd_dealloc(dev, pd->pdn);
473 return 0;
474 }
475
476 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
477 {
478 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
479
480 return efa_com_destroy_qp(&dev->edev, &params);
481 }
482
483 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
484 {
485 rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
486 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
487 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
488 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
489 }
490
491 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
492 {
493 struct efa_dev *dev = to_edev(ibqp->pd->device);
494 struct efa_qp *qp = to_eqp(ibqp);
495 int err;
496
497 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
498
499 err = efa_destroy_qp_handle(dev, qp->qp_handle);
500 if (err)
501 return err;
502
503 efa_qp_user_mmap_entries_remove(qp);
504
505 if (qp->rq_cpu_addr) {
506 ibdev_dbg(&dev->ibdev,
507 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
508 qp->rq_cpu_addr, qp->rq_size,
509 &qp->rq_dma_addr);
510 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
511 qp->rq_size, DMA_TO_DEVICE);
512 }
513
514 return 0;
515 }
516
517 static struct rdma_user_mmap_entry*
518 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
519 u64 address, size_t length,
520 u8 mmap_flag, u64 *offset)
521 {
522 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
523 int err;
524
525 if (!entry)
526 return NULL;
527
528 entry->address = address;
529 entry->mmap_flag = mmap_flag;
530
531 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
532 length);
533 if (err) {
534 kfree(entry);
535 return NULL;
536 }
537 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
538
539 return &entry->rdma_entry;
540 }
541
542 static int qp_mmap_entries_setup(struct efa_qp *qp,
543 struct efa_dev *dev,
544 struct efa_ucontext *ucontext,
545 struct efa_com_create_qp_params *params,
546 struct efa_ibv_create_qp_resp *resp)
547 {
548 size_t length;
549 u64 address;
550
551 address = dev->db_bar_addr + resp->sq_db_offset;
552 qp->sq_db_mmap_entry =
553 efa_user_mmap_entry_insert(&ucontext->ibucontext,
554 address,
555 PAGE_SIZE, EFA_MMAP_IO_NC,
556 &resp->sq_db_mmap_key);
557 if (!qp->sq_db_mmap_entry)
558 return -ENOMEM;
559
560 resp->sq_db_offset &= ~PAGE_MASK;
561
562 address = dev->mem_bar_addr + resp->llq_desc_offset;
563 length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
564 offset_in_page(resp->llq_desc_offset));
565
566 qp->llq_desc_mmap_entry =
567 efa_user_mmap_entry_insert(&ucontext->ibucontext,
568 address, length,
569 EFA_MMAP_IO_WC,
570 &resp->llq_desc_mmap_key);
571 if (!qp->llq_desc_mmap_entry)
572 goto err_remove_mmap;
573
574 resp->llq_desc_offset &= ~PAGE_MASK;
575
576 if (qp->rq_size) {
577 address = dev->db_bar_addr + resp->rq_db_offset;
578
579 qp->rq_db_mmap_entry =
580 efa_user_mmap_entry_insert(&ucontext->ibucontext,
581 address, PAGE_SIZE,
582 EFA_MMAP_IO_NC,
583 &resp->rq_db_mmap_key);
584 if (!qp->rq_db_mmap_entry)
585 goto err_remove_mmap;
586
587 resp->rq_db_offset &= ~PAGE_MASK;
588
589 address = virt_to_phys(qp->rq_cpu_addr);
590 qp->rq_mmap_entry =
591 efa_user_mmap_entry_insert(&ucontext->ibucontext,
592 address, qp->rq_size,
593 EFA_MMAP_DMA_PAGE,
594 &resp->rq_mmap_key);
595 if (!qp->rq_mmap_entry)
596 goto err_remove_mmap;
597
598 resp->rq_mmap_size = qp->rq_size;
599 }
600
601 return 0;
602
603 err_remove_mmap:
604 efa_qp_user_mmap_entries_remove(qp);
605
606 return -ENOMEM;
607 }
608
609 static int efa_qp_validate_cap(struct efa_dev *dev,
610 struct ib_qp_init_attr *init_attr)
611 {
612 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
613 ibdev_dbg(&dev->ibdev,
614 "qp: requested send wr[%u] exceeds the max[%u]\n",
615 init_attr->cap.max_send_wr,
616 dev->dev_attr.max_sq_depth);
617 return -EINVAL;
618 }
619 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
620 ibdev_dbg(&dev->ibdev,
621 "qp: requested receive wr[%u] exceeds the max[%u]\n",
622 init_attr->cap.max_recv_wr,
623 dev->dev_attr.max_rq_depth);
624 return -EINVAL;
625 }
626 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
627 ibdev_dbg(&dev->ibdev,
628 "qp: requested sge send[%u] exceeds the max[%u]\n",
629 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
630 return -EINVAL;
631 }
632 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
633 ibdev_dbg(&dev->ibdev,
634 "qp: requested sge recv[%u] exceeds the max[%u]\n",
635 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
636 return -EINVAL;
637 }
638 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
639 ibdev_dbg(&dev->ibdev,
640 "qp: requested inline data[%u] exceeds the max[%u]\n",
641 init_attr->cap.max_inline_data,
642 dev->dev_attr.inline_buf_size);
643 return -EINVAL;
644 }
645
646 return 0;
647 }
648
649 static int efa_qp_validate_attr(struct efa_dev *dev,
650 struct ib_qp_init_attr *init_attr)
651 {
652 if (init_attr->qp_type != IB_QPT_DRIVER &&
653 init_attr->qp_type != IB_QPT_UD) {
654 ibdev_dbg(&dev->ibdev,
655 "Unsupported qp type %d\n", init_attr->qp_type);
656 return -EOPNOTSUPP;
657 }
658
659 if (init_attr->srq) {
660 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
661 return -EOPNOTSUPP;
662 }
663
664 if (init_attr->create_flags) {
665 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
666 return -EOPNOTSUPP;
667 }
668
669 return 0;
670 }
671
672 int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
673 struct ib_udata *udata)
674 {
675 struct efa_com_create_qp_params create_qp_params = {};
676 struct efa_com_create_qp_result create_qp_resp;
677 struct efa_dev *dev = to_edev(ibqp->device);
678 struct efa_ibv_create_qp_resp resp = {};
679 struct efa_ibv_create_qp cmd = {};
680 struct efa_qp *qp = to_eqp(ibqp);
681 struct efa_ucontext *ucontext;
682 u16 supported_efa_flags = 0;
683 int err;
684
685 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
686 ibucontext);
687
688 err = efa_qp_validate_cap(dev, init_attr);
689 if (err)
690 goto err_out;
691
692 err = efa_qp_validate_attr(dev, init_attr);
693 if (err)
694 goto err_out;
695
696 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
697 ibdev_dbg(&dev->ibdev,
698 "Incompatible ABI params, no input udata\n");
699 err = -EINVAL;
700 goto err_out;
701 }
702
703 if (udata->inlen > sizeof(cmd) &&
704 !ib_is_udata_cleared(udata, sizeof(cmd),
705 udata->inlen - sizeof(cmd))) {
706 ibdev_dbg(&dev->ibdev,
707 "Incompatible ABI params, unknown fields in udata\n");
708 err = -EINVAL;
709 goto err_out;
710 }
711
712 err = ib_copy_from_udata(&cmd, udata,
713 min(sizeof(cmd), udata->inlen));
714 if (err) {
715 ibdev_dbg(&dev->ibdev,
716 "Cannot copy udata for create_qp\n");
717 goto err_out;
718 }
719
720 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_98)) {
721 ibdev_dbg(&dev->ibdev,
722 "Incompatible ABI params, unknown fields in udata\n");
723 err = -EINVAL;
724 goto err_out;
725 }
726
727 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))
728 supported_efa_flags |= EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV;
729
730 if (cmd.flags & ~supported_efa_flags) {
731 ibdev_dbg(&dev->ibdev, "Unsupported EFA QP create flags[%#x], supported[%#x]\n",
732 cmd.flags, supported_efa_flags);
733 err = -EOPNOTSUPP;
734 goto err_out;
735 }
736
737 create_qp_params.uarn = ucontext->uarn;
738 create_qp_params.pd = to_epd(ibqp->pd)->pdn;
739
740 if (init_attr->qp_type == IB_QPT_UD) {
741 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
742 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
743 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
744 } else {
745 ibdev_dbg(&dev->ibdev,
746 "Unsupported qp type %d driver qp type %d\n",
747 init_attr->qp_type, cmd.driver_qp_type);
748 err = -EOPNOTSUPP;
749 goto err_out;
750 }
751
752 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
753 init_attr->qp_type, cmd.driver_qp_type);
754 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
755 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
756 create_qp_params.sq_depth = init_attr->cap.max_send_wr;
757 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
758
759 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
760 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
761 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
762 if (qp->rq_size) {
763 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
764 qp->rq_size, DMA_TO_DEVICE);
765 if (!qp->rq_cpu_addr) {
766 err = -ENOMEM;
767 goto err_out;
768 }
769
770 ibdev_dbg(&dev->ibdev,
771 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
772 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
773 create_qp_params.rq_base_addr = qp->rq_dma_addr;
774 }
775
776 create_qp_params.sl = cmd.sl;
777
778 if (cmd.flags & EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV)
779 create_qp_params.unsolicited_write_recv = true;
780
781 err = efa_com_create_qp(&dev->edev, &create_qp_params,
782 &create_qp_resp);
783 if (err)
784 goto err_free_mapped;
785
786 resp.sq_db_offset = create_qp_resp.sq_db_offset;
787 resp.rq_db_offset = create_qp_resp.rq_db_offset;
788 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
789 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
790 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
791
792 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
793 &resp);
794 if (err)
795 goto err_destroy_qp;
796
797 qp->qp_handle = create_qp_resp.qp_handle;
798 qp->ibqp.qp_num = create_qp_resp.qp_num;
799 qp->max_send_wr = init_attr->cap.max_send_wr;
800 qp->max_recv_wr = init_attr->cap.max_recv_wr;
801 qp->max_send_sge = init_attr->cap.max_send_sge;
802 qp->max_recv_sge = init_attr->cap.max_recv_sge;
803 qp->max_inline_data = init_attr->cap.max_inline_data;
804
805 if (udata->outlen) {
806 err = ib_copy_to_udata(udata, &resp,
807 min(sizeof(resp), udata->outlen));
808 if (err) {
809 ibdev_dbg(&dev->ibdev,
810 "Failed to copy udata for qp[%u]\n",
811 create_qp_resp.qp_num);
812 goto err_remove_mmap_entries;
813 }
814 }
815
816 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
817
818 return 0;
819
820 err_remove_mmap_entries:
821 efa_qp_user_mmap_entries_remove(qp);
822 err_destroy_qp:
823 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
824 err_free_mapped:
825 if (qp->rq_size)
826 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
827 qp->rq_size, DMA_TO_DEVICE);
828 err_out:
829 atomic64_inc(&dev->stats.create_qp_err);
830 return err;
831 }
832
833 static const struct {
834 int valid;
835 enum ib_qp_attr_mask req_param;
836 enum ib_qp_attr_mask opt_param;
837 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
838 [IB_QPS_RESET] = {
839 [IB_QPS_RESET] = { .valid = 1 },
840 [IB_QPS_INIT] = {
841 .valid = 1,
842 .req_param = IB_QP_PKEY_INDEX |
843 IB_QP_PORT |
844 IB_QP_QKEY,
845 },
846 },
847 [IB_QPS_INIT] = {
848 [IB_QPS_RESET] = { .valid = 1 },
849 [IB_QPS_ERR] = { .valid = 1 },
850 [IB_QPS_INIT] = {
851 .valid = 1,
852 .opt_param = IB_QP_PKEY_INDEX |
853 IB_QP_PORT |
854 IB_QP_QKEY,
855 },
856 [IB_QPS_RTR] = {
857 .valid = 1,
858 .opt_param = IB_QP_PKEY_INDEX |
859 IB_QP_QKEY,
860 },
861 },
862 [IB_QPS_RTR] = {
863 [IB_QPS_RESET] = { .valid = 1 },
864 [IB_QPS_ERR] = { .valid = 1 },
865 [IB_QPS_RTS] = {
866 .valid = 1,
867 .req_param = IB_QP_SQ_PSN,
868 .opt_param = IB_QP_CUR_STATE |
869 IB_QP_QKEY |
870 IB_QP_RNR_RETRY,
871
872 }
873 },
874 [IB_QPS_RTS] = {
875 [IB_QPS_RESET] = { .valid = 1 },
876 [IB_QPS_ERR] = { .valid = 1 },
877 [IB_QPS_RTS] = {
878 .valid = 1,
879 .opt_param = IB_QP_CUR_STATE |
880 IB_QP_QKEY,
881 },
882 [IB_QPS_SQD] = {
883 .valid = 1,
884 .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,
885 },
886 },
887 [IB_QPS_SQD] = {
888 [IB_QPS_RESET] = { .valid = 1 },
889 [IB_QPS_ERR] = { .valid = 1 },
890 [IB_QPS_RTS] = {
891 .valid = 1,
892 .opt_param = IB_QP_CUR_STATE |
893 IB_QP_QKEY,
894 },
895 [IB_QPS_SQD] = {
896 .valid = 1,
897 .opt_param = IB_QP_PKEY_INDEX |
898 IB_QP_QKEY,
899 }
900 },
901 [IB_QPS_SQE] = {
902 [IB_QPS_RESET] = { .valid = 1 },
903 [IB_QPS_ERR] = { .valid = 1 },
904 [IB_QPS_RTS] = {
905 .valid = 1,
906 .opt_param = IB_QP_CUR_STATE |
907 IB_QP_QKEY,
908 }
909 },
910 [IB_QPS_ERR] = {
911 [IB_QPS_RESET] = { .valid = 1 },
912 [IB_QPS_ERR] = { .valid = 1 },
913 }
914 };
915
916 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,
917 enum ib_qp_state next_state,
918 enum ib_qp_attr_mask mask)
919 {
920 enum ib_qp_attr_mask req_param, opt_param;
921
922 if (mask & IB_QP_CUR_STATE &&
923 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
924 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
925 return false;
926
927 if (!srd_qp_state_table[cur_state][next_state].valid)
928 return false;
929
930 req_param = srd_qp_state_table[cur_state][next_state].req_param;
931 opt_param = srd_qp_state_table[cur_state][next_state].opt_param;
932
933 if ((mask & req_param) != req_param)
934 return false;
935
936 if (mask & ~(req_param | opt_param | IB_QP_STATE))
937 return false;
938
939 return true;
940 }
941
942 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
943 struct ib_qp_attr *qp_attr, int qp_attr_mask,
944 enum ib_qp_state cur_state,
945 enum ib_qp_state new_state)
946 {
947 int err;
948
949 #define EFA_MODIFY_QP_SUPP_MASK \
950 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
951 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
952 IB_QP_RNR_RETRY)
953
954 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
955 ibdev_dbg(&dev->ibdev,
956 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
957 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
958 return -EOPNOTSUPP;
959 }
960
961 if (qp->ibqp.qp_type == IB_QPT_DRIVER)
962 err = !efa_modify_srd_qp_is_ok(cur_state, new_state,
963 qp_attr_mask);
964 else
965 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
966 qp_attr_mask);
967
968 if (err) {
969 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
970 return -EINVAL;
971 }
972
973 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
974 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
975 return -EOPNOTSUPP;
976 }
977
978 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
979 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
980 return -EOPNOTSUPP;
981 }
982
983 return 0;
984 }
985
986 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
987 int qp_attr_mask, struct ib_udata *udata)
988 {
989 struct efa_dev *dev = to_edev(ibqp->device);
990 struct efa_com_modify_qp_params params = {};
991 struct efa_qp *qp = to_eqp(ibqp);
992 enum ib_qp_state cur_state;
993 enum ib_qp_state new_state;
994 int err;
995
996 if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
997 return -EOPNOTSUPP;
998
999 if (udata->inlen &&
1000 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1001 ibdev_dbg(&dev->ibdev,
1002 "Incompatible ABI params, udata not cleared\n");
1003 return -EINVAL;
1004 }
1005
1006 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
1007 qp->state;
1008 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
1009
1010 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
1011 new_state);
1012 if (err)
1013 return err;
1014
1015 params.qp_handle = qp->qp_handle;
1016
1017 if (qp_attr_mask & IB_QP_STATE) {
1018 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,
1019 1);
1020 EFA_SET(&params.modify_mask,
1021 EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);
1022 params.cur_qp_state = cur_state;
1023 params.qp_state = new_state;
1024 }
1025
1026 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
1027 EFA_SET(&params.modify_mask,
1028 EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);
1029 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
1030 }
1031
1032 if (qp_attr_mask & IB_QP_QKEY) {
1033 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);
1034 params.qkey = qp_attr->qkey;
1035 }
1036
1037 if (qp_attr_mask & IB_QP_SQ_PSN) {
1038 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);
1039 params.sq_psn = qp_attr->sq_psn;
1040 }
1041
1042 if (qp_attr_mask & IB_QP_RNR_RETRY) {
1043 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
1044 1);
1045 params.rnr_retry = qp_attr->rnr_retry;
1046 }
1047
1048 err = efa_com_modify_qp(&dev->edev, &params);
1049 if (err)
1050 return err;
1051
1052 qp->state = new_state;
1053
1054 return 0;
1055 }
1056
1057 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
1058 {
1059 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
1060
1061 return efa_com_destroy_cq(&dev->edev, &params);
1062 }
1063
1064 static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq)
1065 {
1066 rdma_user_mmap_entry_remove(cq->db_mmap_entry);
1067 rdma_user_mmap_entry_remove(cq->mmap_entry);
1068 }
1069
1070 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
1071 {
1072 struct efa_dev *dev = to_edev(ibcq->device);
1073 struct efa_cq *cq = to_ecq(ibcq);
1074
1075 ibdev_dbg(&dev->ibdev,
1076 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
1077 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
1078
1079 efa_destroy_cq_idx(dev, cq->cq_idx);
1080 efa_cq_user_mmap_entries_remove(cq);
1081 if (cq->eq) {
1082 xa_erase(&dev->cqs_xa, cq->cq_idx);
1083 synchronize_irq(cq->eq->irq.irqn);
1084 }
1085 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1086 DMA_FROM_DEVICE);
1087 return 0;
1088 }
1089
1090 static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec)
1091 {
1092 return &dev->eqs[vec];
1093 }
1094
1095 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
1096 struct efa_ibv_create_cq_resp *resp,
1097 bool db_valid)
1098 {
1099 resp->q_mmap_size = cq->size;
1100 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1101 virt_to_phys(cq->cpu_addr),
1102 cq->size, EFA_MMAP_DMA_PAGE,
1103 &resp->q_mmap_key);
1104 if (!cq->mmap_entry)
1105 return -ENOMEM;
1106
1107 if (db_valid) {
1108 cq->db_mmap_entry =
1109 efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1110 dev->db_bar_addr + resp->db_off,
1111 PAGE_SIZE, EFA_MMAP_IO_NC,
1112 &resp->db_mmap_key);
1113 if (!cq->db_mmap_entry) {
1114 rdma_user_mmap_entry_remove(cq->mmap_entry);
1115 return -ENOMEM;
1116 }
1117
1118 resp->db_off &= ~PAGE_MASK;
1119 resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF;
1120 }
1121
1122 return 0;
1123 }
1124
1125 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1126 struct uverbs_attr_bundle *attrs)
1127 {
1128 struct ib_udata *udata = &attrs->driver_udata;
1129 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
1130 udata, struct efa_ucontext, ibucontext);
1131 struct efa_com_create_cq_params params = {};
1132 struct efa_ibv_create_cq_resp resp = {};
1133 struct efa_com_create_cq_result result;
1134 struct ib_device *ibdev = ibcq->device;
1135 struct efa_dev *dev = to_edev(ibdev);
1136 struct efa_ibv_create_cq cmd = {};
1137 struct efa_cq *cq = to_ecq(ibcq);
1138 int entries = attr->cqe;
1139 bool set_src_addr;
1140 int err;
1141
1142 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
1143
1144 if (attr->flags)
1145 return -EOPNOTSUPP;
1146
1147 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
1148 ibdev_dbg(ibdev,
1149 "cq: requested entries[%u] non-positive or greater than max[%u]\n",
1150 entries, dev->dev_attr.max_cq_depth);
1151 err = -EINVAL;
1152 goto err_out;
1153 }
1154
1155 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
1156 ibdev_dbg(ibdev,
1157 "Incompatible ABI params, no input udata\n");
1158 err = -EINVAL;
1159 goto err_out;
1160 }
1161
1162 if (udata->inlen > sizeof(cmd) &&
1163 !ib_is_udata_cleared(udata, sizeof(cmd),
1164 udata->inlen - sizeof(cmd))) {
1165 ibdev_dbg(ibdev,
1166 "Incompatible ABI params, unknown fields in udata\n");
1167 err = -EINVAL;
1168 goto err_out;
1169 }
1170
1171 err = ib_copy_from_udata(&cmd, udata,
1172 min(sizeof(cmd), udata->inlen));
1173 if (err) {
1174 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
1175 goto err_out;
1176 }
1177
1178 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {
1179 ibdev_dbg(ibdev,
1180 "Incompatible ABI params, unknown fields in udata\n");
1181 err = -EINVAL;
1182 goto err_out;
1183 }
1184
1185 set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID);
1186 if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) &&
1187 (set_src_addr ||
1188 cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) {
1189 ibdev_dbg(ibdev,
1190 "Invalid entry size [%u]\n", cmd.cq_entry_size);
1191 err = -EINVAL;
1192 goto err_out;
1193 }
1194
1195 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
1196 ibdev_dbg(ibdev,
1197 "Invalid number of sub cqs[%u] expected[%u]\n",
1198 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
1199 err = -EINVAL;
1200 goto err_out;
1201 }
1202
1203 cq->ucontext = ucontext;
1204 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
1205 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
1206 DMA_FROM_DEVICE);
1207 if (!cq->cpu_addr) {
1208 err = -ENOMEM;
1209 goto err_out;
1210 }
1211
1212 params.uarn = cq->ucontext->uarn;
1213 params.sub_cq_depth = entries;
1214 params.dma_addr = cq->dma_addr;
1215 params.entry_size_in_bytes = cmd.cq_entry_size;
1216 params.num_sub_cqs = cmd.num_sub_cqs;
1217 params.set_src_addr = set_src_addr;
1218 if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) {
1219 cq->eq = efa_vec2eq(dev, attr->comp_vector);
1220 params.eqn = cq->eq->eeq.eqn;
1221 params.interrupt_mode_enabled = true;
1222 }
1223
1224 err = efa_com_create_cq(&dev->edev, &params, &result);
1225 if (err)
1226 goto err_free_mapped;
1227
1228 resp.db_off = result.db_off;
1229 resp.cq_idx = result.cq_idx;
1230 cq->cq_idx = result.cq_idx;
1231 cq->ibcq.cqe = result.actual_depth;
1232 WARN_ON_ONCE(entries != result.actual_depth);
1233
1234 err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid);
1235 if (err) {
1236 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
1237 cq->cq_idx);
1238 goto err_destroy_cq;
1239 }
1240
1241 if (cq->eq) {
1242 err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL));
1243 if (err) {
1244 ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n",
1245 cq->cq_idx);
1246 goto err_remove_mmap;
1247 }
1248 }
1249
1250 if (udata->outlen) {
1251 err = ib_copy_to_udata(udata, &resp,
1252 min(sizeof(resp), udata->outlen));
1253 if (err) {
1254 ibdev_dbg(ibdev,
1255 "Failed to copy udata for create_cq\n");
1256 goto err_xa_erase;
1257 }
1258 }
1259
1260 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1261 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1262
1263 return 0;
1264
1265 err_xa_erase:
1266 if (cq->eq)
1267 xa_erase(&dev->cqs_xa, cq->cq_idx);
1268 err_remove_mmap:
1269 efa_cq_user_mmap_entries_remove(cq);
1270 err_destroy_cq:
1271 efa_destroy_cq_idx(dev, cq->cq_idx);
1272 err_free_mapped:
1273 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1274 DMA_FROM_DEVICE);
1275
1276 err_out:
1277 atomic64_inc(&dev->stats.create_cq_err);
1278 return err;
1279 }
1280
1281 static int umem_to_page_list(struct efa_dev *dev,
1282 struct ib_umem *umem,
1283 u64 *page_list,
1284 u32 hp_cnt,
1285 u8 hp_shift)
1286 {
1287 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1288 struct ib_block_iter biter;
1289 unsigned int hp_idx = 0;
1290
1291 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1292 hp_cnt, pages_in_hp);
1293
1294 rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
1295 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1296
1297 return 0;
1298 }
1299
1300 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1301 {
1302 struct scatterlist *sglist;
1303 struct page *pg;
1304 int i;
1305
1306 sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);
1307 if (!sglist)
1308 return NULL;
1309 sg_init_table(sglist, page_cnt);
1310 for (i = 0; i < page_cnt; i++) {
1311 pg = vmalloc_to_page(buf);
1312 if (!pg)
1313 goto err;
1314 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1315 buf += PAGE_SIZE / sizeof(*buf);
1316 }
1317 return sglist;
1318
1319 err:
1320 kfree(sglist);
1321 return NULL;
1322 }
1323
1324 /*
1325 * create a chunk list of physical pages dma addresses from the supplied
1326 * scatter gather list
1327 */
1328 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1329 {
1330 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1331 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1332 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1333 unsigned int chunk_list_size, chunk_idx, payload_idx;
1334 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1335 struct efa_com_ctrl_buff_info *ctrl_buf;
1336 u64 *cur_chunk_buf, *prev_chunk_buf;
1337 struct ib_block_iter biter;
1338 dma_addr_t dma_addr;
1339 int i;
1340
1341 /* allocate a chunk list that consists of 4KB chunks */
1342 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1343
1344 chunk_list->size = chunk_list_size;
1345 chunk_list->chunks = kcalloc(chunk_list_size,
1346 sizeof(*chunk_list->chunks),
1347 GFP_KERNEL);
1348 if (!chunk_list->chunks)
1349 return -ENOMEM;
1350
1351 ibdev_dbg(&dev->ibdev,
1352 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1353 page_cnt);
1354
1355 /* allocate chunk buffers: */
1356 for (i = 0; i < chunk_list_size; i++) {
1357 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1358 if (!chunk_list->chunks[i].buf)
1359 goto chunk_list_dealloc;
1360
1361 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1362 }
1363 chunk_list->chunks[chunk_list_size - 1].length =
1364 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1365 EFA_CHUNK_PTR_SIZE;
1366
1367 /* fill the dma addresses of sg list pages to chunks: */
1368 chunk_idx = 0;
1369 payload_idx = 0;
1370 cur_chunk_buf = chunk_list->chunks[0].buf;
1371 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1372 EFA_CHUNK_PAYLOAD_SIZE) {
1373 cur_chunk_buf[payload_idx++] =
1374 rdma_block_iter_dma_address(&biter);
1375
1376 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1377 chunk_idx++;
1378 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1379 payload_idx = 0;
1380 }
1381 }
1382
1383 /* map chunks to dma and fill chunks next ptrs */
1384 for (i = chunk_list_size - 1; i >= 0; i--) {
1385 dma_addr = dma_map_single(&dev->pdev->dev,
1386 chunk_list->chunks[i].buf,
1387 chunk_list->chunks[i].length,
1388 DMA_TO_DEVICE);
1389 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1390 ibdev_err(&dev->ibdev,
1391 "chunk[%u] dma_map_failed\n", i);
1392 goto chunk_list_unmap;
1393 }
1394
1395 chunk_list->chunks[i].dma_addr = dma_addr;
1396 ibdev_dbg(&dev->ibdev,
1397 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1398
1399 if (!i)
1400 break;
1401
1402 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1403
1404 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1405 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1406 ctrl_buf->length = chunk_list->chunks[i].length;
1407
1408 efa_com_set_dma_addr(dma_addr,
1409 &ctrl_buf->address.mem_addr_high,
1410 &ctrl_buf->address.mem_addr_low);
1411 }
1412
1413 return 0;
1414
1415 chunk_list_unmap:
1416 for (; i < chunk_list_size; i++) {
1417 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1418 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1419 }
1420 chunk_list_dealloc:
1421 for (i = 0; i < chunk_list_size; i++)
1422 kfree(chunk_list->chunks[i].buf);
1423
1424 kfree(chunk_list->chunks);
1425 return -ENOMEM;
1426 }
1427
1428 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1429 {
1430 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1431 int i;
1432
1433 for (i = 0; i < chunk_list->size; i++) {
1434 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1435 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1436 kfree(chunk_list->chunks[i].buf);
1437 }
1438
1439 kfree(chunk_list->chunks);
1440 }
1441
1442 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
1443 static int pbl_continuous_initialize(struct efa_dev *dev,
1444 struct pbl_context *pbl)
1445 {
1446 dma_addr_t dma_addr;
1447
1448 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1449 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1450 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1451 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1452 return -ENOMEM;
1453 }
1454
1455 pbl->phys.continuous.dma_addr = dma_addr;
1456 ibdev_dbg(&dev->ibdev,
1457 "pbl continuous - dma_addr = %pad, size[%u]\n",
1458 &dma_addr, pbl->pbl_buf_size_in_bytes);
1459
1460 return 0;
1461 }
1462
1463 /*
1464 * initialize pbl indirect mode:
1465 * create a chunk list out of the dma addresses of the physical pages of
1466 * pbl buffer.
1467 */
1468 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1469 {
1470 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE);
1471 struct scatterlist *sgl;
1472 int sg_dma_cnt, err;
1473
1474 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1475 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1476 if (!sgl)
1477 return -ENOMEM;
1478
1479 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1480 if (!sg_dma_cnt) {
1481 err = -EINVAL;
1482 goto err_map;
1483 }
1484
1485 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1486 pbl->phys.indirect.sgl = sgl;
1487 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1488 err = pbl_chunk_list_create(dev, pbl);
1489 if (err) {
1490 ibdev_dbg(&dev->ibdev,
1491 "chunk_list creation failed[%d]\n", err);
1492 goto err_chunk;
1493 }
1494
1495 ibdev_dbg(&dev->ibdev,
1496 "pbl indirect - size[%u], chunks[%u]\n",
1497 pbl->pbl_buf_size_in_bytes,
1498 pbl->phys.indirect.chunk_list.size);
1499
1500 return 0;
1501
1502 err_chunk:
1503 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1504 err_map:
1505 kfree(sgl);
1506 return err;
1507 }
1508
1509 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1510 {
1511 pbl_chunk_list_destroy(dev, pbl);
1512 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1513 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1514 kfree(pbl->phys.indirect.sgl);
1515 }
1516
1517 /* create a page buffer list from a mapped user memory region */
1518 static int pbl_create(struct efa_dev *dev,
1519 struct pbl_context *pbl,
1520 struct ib_umem *umem,
1521 int hp_cnt,
1522 u8 hp_shift)
1523 {
1524 int err;
1525
1526 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1527 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1528 if (!pbl->pbl_buf)
1529 return -ENOMEM;
1530
1531 if (is_vmalloc_addr(pbl->pbl_buf)) {
1532 pbl->physically_continuous = 0;
1533 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1534 hp_shift);
1535 if (err)
1536 goto err_free;
1537
1538 err = pbl_indirect_initialize(dev, pbl);
1539 if (err)
1540 goto err_free;
1541 } else {
1542 pbl->physically_continuous = 1;
1543 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1544 hp_shift);
1545 if (err)
1546 goto err_free;
1547
1548 err = pbl_continuous_initialize(dev, pbl);
1549 if (err)
1550 goto err_free;
1551 }
1552
1553 ibdev_dbg(&dev->ibdev,
1554 "user_pbl_created: user_pages[%u], continuous[%u]\n",
1555 hp_cnt, pbl->physically_continuous);
1556
1557 return 0;
1558
1559 err_free:
1560 kvfree(pbl->pbl_buf);
1561 return err;
1562 }
1563
1564 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1565 {
1566 if (pbl->physically_continuous)
1567 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1568 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1569 else
1570 pbl_indirect_terminate(dev, pbl);
1571
1572 kvfree(pbl->pbl_buf);
1573 }
1574
1575 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1576 struct efa_com_reg_mr_params *params)
1577 {
1578 int err;
1579
1580 params->inline_pbl = 1;
1581 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1582 params->page_num, params->page_shift);
1583 if (err)
1584 return err;
1585
1586 ibdev_dbg(&dev->ibdev,
1587 "inline_pbl_array - pages[%u]\n", params->page_num);
1588
1589 return 0;
1590 }
1591
1592 static int efa_create_pbl(struct efa_dev *dev,
1593 struct pbl_context *pbl,
1594 struct efa_mr *mr,
1595 struct efa_com_reg_mr_params *params)
1596 {
1597 int err;
1598
1599 err = pbl_create(dev, pbl, mr->umem, params->page_num,
1600 params->page_shift);
1601 if (err) {
1602 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1603 return err;
1604 }
1605
1606 params->inline_pbl = 0;
1607 params->indirect = !pbl->physically_continuous;
1608 if (pbl->physically_continuous) {
1609 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1610
1611 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1612 &params->pbl.pbl.address.mem_addr_high,
1613 &params->pbl.pbl.address.mem_addr_low);
1614 } else {
1615 params->pbl.pbl.length =
1616 pbl->phys.indirect.chunk_list.chunks[0].length;
1617
1618 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1619 &params->pbl.pbl.address.mem_addr_high,
1620 &params->pbl.pbl.address.mem_addr_low);
1621 }
1622
1623 return 0;
1624 }
1625
1626 static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags,
1627 struct ib_udata *udata)
1628 {
1629 struct efa_dev *dev = to_edev(ibpd->device);
1630 int supp_access_flags;
1631 struct efa_mr *mr;
1632
1633 if (udata && udata->inlen &&
1634 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1635 ibdev_dbg(&dev->ibdev,
1636 "Incompatible ABI params, udata not cleared\n");
1637 return ERR_PTR(-EINVAL);
1638 }
1639
1640 supp_access_flags =
1641 IB_ACCESS_LOCAL_WRITE |
1642 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0) |
1643 (EFA_DEV_CAP(dev, RDMA_WRITE) ? IB_ACCESS_REMOTE_WRITE : 0);
1644
1645 access_flags &= ~IB_ACCESS_OPTIONAL;
1646 if (access_flags & ~supp_access_flags) {
1647 ibdev_dbg(&dev->ibdev,
1648 "Unsupported access flags[%#x], supported[%#x]\n",
1649 access_flags, supp_access_flags);
1650 return ERR_PTR(-EOPNOTSUPP);
1651 }
1652
1653 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1654 if (!mr)
1655 return ERR_PTR(-ENOMEM);
1656
1657 return mr;
1658 }
1659
1660 static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start,
1661 u64 length, u64 virt_addr, int access_flags)
1662 {
1663 struct efa_dev *dev = to_edev(ibpd->device);
1664 struct efa_com_reg_mr_params params = {};
1665 struct efa_com_reg_mr_result result = {};
1666 struct pbl_context pbl;
1667 unsigned int pg_sz;
1668 int inline_size;
1669 int err;
1670
1671 params.pd = to_epd(ibpd)->pdn;
1672 params.iova = virt_addr;
1673 params.mr_length_in_bytes = length;
1674 params.permissions = access_flags;
1675
1676 pg_sz = ib_umem_find_best_pgsz(mr->umem,
1677 dev->dev_attr.page_size_cap,
1678 virt_addr);
1679 if (!pg_sz) {
1680 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1681 dev->dev_attr.page_size_cap);
1682 return -EOPNOTSUPP;
1683 }
1684
1685 params.page_shift = order_base_2(pg_sz);
1686 params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);
1687
1688 ibdev_dbg(&dev->ibdev,
1689 "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1690 start, length, params.page_shift, params.page_num);
1691
1692 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1693 if (params.page_num <= inline_size) {
1694 err = efa_create_inline_pbl(dev, mr, &params);
1695 if (err)
1696 return err;
1697
1698 err = efa_com_register_mr(&dev->edev, &params, &result);
1699 if (err)
1700 return err;
1701 } else {
1702 err = efa_create_pbl(dev, &pbl, mr, &params);
1703 if (err)
1704 return err;
1705
1706 err = efa_com_register_mr(&dev->edev, &params, &result);
1707 pbl_destroy(dev, &pbl);
1708
1709 if (err)
1710 return err;
1711 }
1712
1713 mr->ibmr.lkey = result.l_key;
1714 mr->ibmr.rkey = result.r_key;
1715 mr->ibmr.length = length;
1716 mr->ic_info.recv_ic_id = result.ic_info.recv_ic_id;
1717 mr->ic_info.rdma_read_ic_id = result.ic_info.rdma_read_ic_id;
1718 mr->ic_info.rdma_recv_ic_id = result.ic_info.rdma_recv_ic_id;
1719 mr->ic_info.recv_ic_id_valid = result.ic_info.recv_ic_id_valid;
1720 mr->ic_info.rdma_read_ic_id_valid = result.ic_info.rdma_read_ic_id_valid;
1721 mr->ic_info.rdma_recv_ic_id_valid = result.ic_info.rdma_recv_ic_id_valid;
1722 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1723
1724 return 0;
1725 }
1726
1727 struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,
1728 u64 length, u64 virt_addr,
1729 int fd, int access_flags,
1730 struct uverbs_attr_bundle *attrs)
1731 {
1732 struct efa_dev *dev = to_edev(ibpd->device);
1733 struct ib_umem_dmabuf *umem_dmabuf;
1734 struct efa_mr *mr;
1735 int err;
1736
1737 mr = efa_alloc_mr(ibpd, access_flags, &attrs->driver_udata);
1738 if (IS_ERR(mr)) {
1739 err = PTR_ERR(mr);
1740 goto err_out;
1741 }
1742
1743 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd,
1744 access_flags);
1745 if (IS_ERR(umem_dmabuf)) {
1746 err = PTR_ERR(umem_dmabuf);
1747 ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%d]\n", err);
1748 goto err_free;
1749 }
1750
1751 mr->umem = &umem_dmabuf->umem;
1752 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1753 if (err)
1754 goto err_release;
1755
1756 return &mr->ibmr;
1757
1758 err_release:
1759 ib_umem_release(mr->umem);
1760 err_free:
1761 kfree(mr);
1762 err_out:
1763 atomic64_inc(&dev->stats.reg_mr_err);
1764 return ERR_PTR(err);
1765 }
1766
1767 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1768 u64 virt_addr, int access_flags,
1769 struct ib_udata *udata)
1770 {
1771 struct efa_dev *dev = to_edev(ibpd->device);
1772 struct efa_mr *mr;
1773 int err;
1774
1775 mr = efa_alloc_mr(ibpd, access_flags, udata);
1776 if (IS_ERR(mr)) {
1777 err = PTR_ERR(mr);
1778 goto err_out;
1779 }
1780
1781 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1782 if (IS_ERR(mr->umem)) {
1783 err = PTR_ERR(mr->umem);
1784 ibdev_dbg(&dev->ibdev,
1785 "Failed to pin and map user space memory[%d]\n", err);
1786 goto err_free;
1787 }
1788
1789 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1790 if (err)
1791 goto err_release;
1792
1793 return &mr->ibmr;
1794
1795 err_release:
1796 ib_umem_release(mr->umem);
1797 err_free:
1798 kfree(mr);
1799 err_out:
1800 atomic64_inc(&dev->stats.reg_mr_err);
1801 return ERR_PTR(err);
1802 }
1803
1804 static int UVERBS_HANDLER(EFA_IB_METHOD_MR_QUERY)(struct uverbs_attr_bundle *attrs)
1805 {
1806 struct ib_mr *ibmr = uverbs_attr_get_obj(attrs, EFA_IB_ATTR_QUERY_MR_HANDLE);
1807 struct efa_mr *mr = to_emr(ibmr);
1808 u16 ic_id_validity = 0;
1809 int ret;
1810
1811 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,
1812 &mr->ic_info.recv_ic_id, sizeof(mr->ic_info.recv_ic_id));
1813 if (ret)
1814 return ret;
1815
1816 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,
1817 &mr->ic_info.rdma_read_ic_id, sizeof(mr->ic_info.rdma_read_ic_id));
1818 if (ret)
1819 return ret;
1820
1821 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,
1822 &mr->ic_info.rdma_recv_ic_id, sizeof(mr->ic_info.rdma_recv_ic_id));
1823 if (ret)
1824 return ret;
1825
1826 if (mr->ic_info.recv_ic_id_valid)
1827 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RECV_IC_ID;
1828 if (mr->ic_info.rdma_read_ic_id_valid)
1829 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_READ_IC_ID;
1830 if (mr->ic_info.rdma_recv_ic_id_valid)
1831 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_RECV_IC_ID;
1832
1833 return uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,
1834 &ic_id_validity, sizeof(ic_id_validity));
1835 }
1836
1837 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1838 {
1839 struct efa_dev *dev = to_edev(ibmr->device);
1840 struct efa_com_dereg_mr_params params;
1841 struct efa_mr *mr = to_emr(ibmr);
1842 int err;
1843
1844 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1845
1846 params.l_key = mr->ibmr.lkey;
1847 err = efa_com_dereg_mr(&dev->edev, &params);
1848 if (err)
1849 return err;
1850
1851 ib_umem_release(mr->umem);
1852 kfree(mr);
1853
1854 return 0;
1855 }
1856
1857 int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,
1858 struct ib_port_immutable *immutable)
1859 {
1860 struct ib_port_attr attr;
1861 int err;
1862
1863 err = ib_query_port(ibdev, port_num, &attr);
1864 if (err) {
1865 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1866 return err;
1867 }
1868
1869 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1870 immutable->gid_tbl_len = attr.gid_tbl_len;
1871
1872 return 0;
1873 }
1874
1875 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1876 {
1877 struct efa_com_dealloc_uar_params params = {
1878 .uarn = uarn,
1879 };
1880
1881 return efa_com_dealloc_uar(&dev->edev, &params);
1882 }
1883
1884 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
1885 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
1886 NULL : #_attr)
1887
1888 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
1889 const struct efa_ibv_alloc_ucontext_cmd *cmd)
1890 {
1891 struct efa_dev *dev = to_edev(ibucontext->device);
1892 char *attr_str;
1893
1894 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
1895 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
1896 goto err;
1897
1898 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
1899 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
1900 attr_str))
1901 goto err;
1902
1903 return 0;
1904
1905 err:
1906 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
1907 attr_str);
1908 return -EOPNOTSUPP;
1909 }
1910
1911 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1912 {
1913 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1914 struct efa_dev *dev = to_edev(ibucontext->device);
1915 struct efa_ibv_alloc_ucontext_resp resp = {};
1916 struct efa_ibv_alloc_ucontext_cmd cmd = {};
1917 struct efa_com_alloc_uar_result result;
1918 int err;
1919
1920 /*
1921 * it's fine if the driver does not know all request fields,
1922 * we will ack input fields in our response.
1923 */
1924
1925 err = ib_copy_from_udata(&cmd, udata,
1926 min(sizeof(cmd), udata->inlen));
1927 if (err) {
1928 ibdev_dbg(&dev->ibdev,
1929 "Cannot copy udata for alloc_ucontext\n");
1930 goto err_out;
1931 }
1932
1933 err = efa_user_comp_handshake(ibucontext, &cmd);
1934 if (err)
1935 goto err_out;
1936
1937 err = efa_com_alloc_uar(&dev->edev, &result);
1938 if (err)
1939 goto err_out;
1940
1941 ucontext->uarn = result.uarn;
1942
1943 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1944 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1945 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1946 resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1947 resp.max_llq_size = dev->dev_attr.max_llq_size;
1948 resp.max_tx_batch = dev->dev_attr.max_tx_batch;
1949 resp.min_sq_wr = dev->dev_attr.min_sq_depth;
1950
1951 err = ib_copy_to_udata(udata, &resp,
1952 min(sizeof(resp), udata->outlen));
1953 if (err)
1954 goto err_dealloc_uar;
1955
1956 return 0;
1957
1958 err_dealloc_uar:
1959 efa_dealloc_uar(dev, result.uarn);
1960 err_out:
1961 atomic64_inc(&dev->stats.alloc_ucontext_err);
1962 return err;
1963 }
1964
1965 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1966 {
1967 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1968 struct efa_dev *dev = to_edev(ibucontext->device);
1969
1970 efa_dealloc_uar(dev, ucontext->uarn);
1971 }
1972
1973 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1974 {
1975 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
1976
1977 kfree(entry);
1978 }
1979
1980 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1981 struct vm_area_struct *vma)
1982 {
1983 struct rdma_user_mmap_entry *rdma_entry;
1984 struct efa_user_mmap_entry *entry;
1985 unsigned long va;
1986 int err = 0;
1987 u64 pfn;
1988
1989 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
1990 if (!rdma_entry) {
1991 ibdev_dbg(&dev->ibdev,
1992 "pgoff[%#lx] does not have valid entry\n",
1993 vma->vm_pgoff);
1994 atomic64_inc(&dev->stats.mmap_err);
1995 return -EINVAL;
1996 }
1997 entry = to_emmap(rdma_entry);
1998
1999 ibdev_dbg(&dev->ibdev,
2000 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
2001 entry->address, rdma_entry->npages * PAGE_SIZE,
2002 entry->mmap_flag);
2003
2004 pfn = entry->address >> PAGE_SHIFT;
2005 switch (entry->mmap_flag) {
2006 case EFA_MMAP_IO_NC:
2007 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
2008 entry->rdma_entry.npages * PAGE_SIZE,
2009 pgprot_noncached(vma->vm_page_prot),
2010 rdma_entry);
2011 break;
2012 case EFA_MMAP_IO_WC:
2013 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
2014 entry->rdma_entry.npages * PAGE_SIZE,
2015 pgprot_writecombine(vma->vm_page_prot),
2016 rdma_entry);
2017 break;
2018 case EFA_MMAP_DMA_PAGE:
2019 for (va = vma->vm_start; va < vma->vm_end;
2020 va += PAGE_SIZE, pfn++) {
2021 err = vm_insert_page(vma, va, pfn_to_page(pfn));
2022 if (err)
2023 break;
2024 }
2025 break;
2026 default:
2027 err = -EINVAL;
2028 }
2029
2030 if (err) {
2031 ibdev_dbg(
2032 &dev->ibdev,
2033 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
2034 entry->address, rdma_entry->npages * PAGE_SIZE,
2035 entry->mmap_flag, err);
2036 atomic64_inc(&dev->stats.mmap_err);
2037 }
2038
2039 rdma_user_mmap_entry_put(rdma_entry);
2040 return err;
2041 }
2042
2043 int efa_mmap(struct ib_ucontext *ibucontext,
2044 struct vm_area_struct *vma)
2045 {
2046 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
2047 struct efa_dev *dev = to_edev(ibucontext->device);
2048 size_t length = vma->vm_end - vma->vm_start;
2049
2050 ibdev_dbg(&dev->ibdev,
2051 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
2052 vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
2053
2054 return __efa_mmap(dev, ucontext, vma);
2055 }
2056
2057 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
2058 {
2059 struct efa_com_destroy_ah_params params = {
2060 .ah = ah->ah,
2061 .pdn = to_epd(ah->ibah.pd)->pdn,
2062 };
2063
2064 return efa_com_destroy_ah(&dev->edev, &params);
2065 }
2066
2067 int efa_create_ah(struct ib_ah *ibah,
2068 struct rdma_ah_init_attr *init_attr,
2069 struct ib_udata *udata)
2070 {
2071 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
2072 struct efa_dev *dev = to_edev(ibah->device);
2073 struct efa_com_create_ah_params params = {};
2074 struct efa_ibv_create_ah_resp resp = {};
2075 struct efa_com_create_ah_result result;
2076 struct efa_ah *ah = to_eah(ibah);
2077 int err;
2078
2079 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
2080 ibdev_dbg(&dev->ibdev,
2081 "Create address handle is not supported in atomic context\n");
2082 err = -EOPNOTSUPP;
2083 goto err_out;
2084 }
2085
2086 if (udata->inlen &&
2087 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
2088 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
2089 err = -EINVAL;
2090 goto err_out;
2091 }
2092
2093 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
2094 sizeof(params.dest_addr));
2095 params.pdn = to_epd(ibah->pd)->pdn;
2096 err = efa_com_create_ah(&dev->edev, &params, &result);
2097 if (err)
2098 goto err_out;
2099
2100 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
2101 ah->ah = result.ah;
2102
2103 resp.efa_address_handle = result.ah;
2104
2105 if (udata->outlen) {
2106 err = ib_copy_to_udata(udata, &resp,
2107 min(sizeof(resp), udata->outlen));
2108 if (err) {
2109 ibdev_dbg(&dev->ibdev,
2110 "Failed to copy udata for create_ah response\n");
2111 goto err_destroy_ah;
2112 }
2113 }
2114 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
2115
2116 return 0;
2117
2118 err_destroy_ah:
2119 efa_ah_destroy(dev, ah);
2120 err_out:
2121 atomic64_inc(&dev->stats.create_ah_err);
2122 return err;
2123 }
2124
2125 int efa_destroy_ah(struct ib_ah *ibah, u32 flags)
2126 {
2127 struct efa_dev *dev = to_edev(ibah->pd->device);
2128 struct efa_ah *ah = to_eah(ibah);
2129
2130 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
2131
2132 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
2133 ibdev_dbg(&dev->ibdev,
2134 "Destroy address handle is not supported in atomic context\n");
2135 return -EOPNOTSUPP;
2136 }
2137
2138 efa_ah_destroy(dev, ah);
2139 return 0;
2140 }
2141
2142 struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev,
2143 u32 port_num)
2144 {
2145 return rdma_alloc_hw_stats_struct(efa_port_stats_descs,
2146 ARRAY_SIZE(efa_port_stats_descs),
2147 RDMA_HW_STATS_DEFAULT_LIFESPAN);
2148 }
2149
2150 struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev)
2151 {
2152 return rdma_alloc_hw_stats_struct(efa_device_stats_descs,
2153 ARRAY_SIZE(efa_device_stats_descs),
2154 RDMA_HW_STATS_DEFAULT_LIFESPAN);
2155 }
2156
2157 static int efa_fill_device_stats(struct efa_dev *dev,
2158 struct rdma_hw_stats *stats)
2159 {
2160 struct efa_com_stats_admin *as = &dev->edev.aq.stats;
2161 struct efa_stats *s = &dev->stats;
2162
2163 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
2164 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
2165 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
2166 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
2167
2168 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
2169 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);
2170 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);
2171 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);
2172 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);
2173 stats->value[EFA_ALLOC_UCONTEXT_ERR] =
2174 atomic64_read(&s->alloc_ucontext_err);
2175 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);
2176 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);
2177
2178 return ARRAY_SIZE(efa_device_stats_descs);
2179 }
2180
2181 static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats,
2182 u32 port_num)
2183 {
2184 struct efa_com_get_stats_params params = {};
2185 union efa_com_get_stats_result result;
2186 struct efa_com_rdma_write_stats *rws;
2187 struct efa_com_rdma_read_stats *rrs;
2188 struct efa_com_messages_stats *ms;
2189 struct efa_com_basic_stats *bs;
2190 int err;
2191
2192 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
2193 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
2194
2195 err = efa_com_get_stats(&dev->edev, &params, &result);
2196 if (err)
2197 return err;
2198
2199 bs = &result.basic_stats;
2200 stats->value[EFA_TX_BYTES] = bs->tx_bytes;
2201 stats->value[EFA_TX_PKTS] = bs->tx_pkts;
2202 stats->value[EFA_RX_BYTES] = bs->rx_bytes;
2203 stats->value[EFA_RX_PKTS] = bs->rx_pkts;
2204 stats->value[EFA_RX_DROPS] = bs->rx_drops;
2205
2206 params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;
2207 err = efa_com_get_stats(&dev->edev, &params, &result);
2208 if (err)
2209 return err;
2210
2211 ms = &result.messages_stats;
2212 stats->value[EFA_SEND_BYTES] = ms->send_bytes;
2213 stats->value[EFA_SEND_WRS] = ms->send_wrs;
2214 stats->value[EFA_RECV_BYTES] = ms->recv_bytes;
2215 stats->value[EFA_RECV_WRS] = ms->recv_wrs;
2216
2217 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;
2218 err = efa_com_get_stats(&dev->edev, &params, &result);
2219 if (err)
2220 return err;
2221
2222 rrs = &result.rdma_read_stats;
2223 stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;
2224 stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;
2225 stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;
2226 stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;
2227
2228 if (EFA_DEV_CAP(dev, RDMA_WRITE)) {
2229 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_WRITE;
2230 err = efa_com_get_stats(&dev->edev, &params, &result);
2231 if (err)
2232 return err;
2233
2234 rws = &result.rdma_write_stats;
2235 stats->value[EFA_RDMA_WRITE_WRS] = rws->write_wrs;
2236 stats->value[EFA_RDMA_WRITE_BYTES] = rws->write_bytes;
2237 stats->value[EFA_RDMA_WRITE_WR_ERR] = rws->write_wr_err;
2238 stats->value[EFA_RDMA_WRITE_RECV_BYTES] = rws->write_recv_bytes;
2239 }
2240
2241 return ARRAY_SIZE(efa_port_stats_descs);
2242 }
2243
2244 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
2245 u32 port_num, int index)
2246 {
2247 if (port_num)
2248 return efa_fill_port_stats(to_edev(ibdev), stats, port_num);
2249 else
2250 return efa_fill_device_stats(to_edev(ibdev), stats);
2251 }
2252
2253 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
2254 u32 port_num)
2255 {
2256 return IB_LINK_LAYER_UNSPECIFIED;
2257 }
2258
2259 DECLARE_UVERBS_NAMED_METHOD(EFA_IB_METHOD_MR_QUERY,
2260 UVERBS_ATTR_IDR(EFA_IB_ATTR_QUERY_MR_HANDLE,
2261 UVERBS_OBJECT_MR,
2262 UVERBS_ACCESS_READ,
2263 UA_MANDATORY),
2264 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,
2265 UVERBS_ATTR_TYPE(u16),
2266 UA_MANDATORY),
2267 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,
2268 UVERBS_ATTR_TYPE(u16),
2269 UA_MANDATORY),
2270 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,
2271 UVERBS_ATTR_TYPE(u16),
2272 UA_MANDATORY),
2273 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,
2274 UVERBS_ATTR_TYPE(u16),
2275 UA_MANDATORY));
2276
2277 ADD_UVERBS_METHODS(efa_mr,
2278 UVERBS_OBJECT_MR,
2279 &UVERBS_METHOD(EFA_IB_METHOD_MR_QUERY));
2280
2281 const struct uapi_definition efa_uapi_defs[] = {
2282 UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_MR,
2283 &efa_mr),
2284 {},
2285 };
Kernel DRM miscellaneous fixes and cross-tree changes