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-rw-r--r--drivers/infiniband/hw/efa/efa_verbs.c1825
1 files changed, 1825 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
new file mode 100644
index 000000000000..6d6886c9009f
--- /dev/null
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -0,0 +1,1825 @@
1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6#include <linux/vmalloc.h>
7
8#include <rdma/ib_addr.h>
9#include <rdma/ib_umem.h>
10#include <rdma/ib_user_verbs.h>
11#include <rdma/ib_verbs.h>
12#include <rdma/uverbs_ioctl.h>
13
14#include "efa.h"
15
16#define EFA_MMAP_FLAG_SHIFT 56
17#define EFA_MMAP_PAGE_MASK GENMASK(EFA_MMAP_FLAG_SHIFT - 1, 0)
18#define EFA_MMAP_INVALID U64_MAX
19
20enum {
21 EFA_MMAP_DMA_PAGE = 0,
22 EFA_MMAP_IO_WC,
23 EFA_MMAP_IO_NC,
24};
25
26#define EFA_AENQ_ENABLED_GROUPS \
27 (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
28 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
29
30struct efa_mmap_entry {
31 void *obj;
32 u64 address;
33 u64 length;
34 u32 mmap_page;
35 u8 mmap_flag;
36};
37
38static inline u64 get_mmap_key(const struct efa_mmap_entry *efa)
39{
40 return ((u64)efa->mmap_flag << EFA_MMAP_FLAG_SHIFT) |
41 ((u64)efa->mmap_page << PAGE_SHIFT);
42}
43
44#define EFA_CHUNK_PAYLOAD_SHIFT 12
45#define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
46#define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
47
48#define EFA_CHUNK_SHIFT 12
49#define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
50#define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
51
52#define EFA_PTRS_PER_CHUNK \
53 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
54
55#define EFA_CHUNK_USED_SIZE \
56 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
57
58#define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
59
60struct pbl_chunk {
61 dma_addr_t dma_addr;
62 u64 *buf;
63 u32 length;
64};
65
66struct pbl_chunk_list {
67 struct pbl_chunk *chunks;
68 unsigned int size;
69};
70
71struct pbl_context {
72 union {
73 struct {
74 dma_addr_t dma_addr;
75 } continuous;
76 struct {
77 u32 pbl_buf_size_in_pages;
78 struct scatterlist *sgl;
79 int sg_dma_cnt;
80 struct pbl_chunk_list chunk_list;
81 } indirect;
82 } phys;
83 u64 *pbl_buf;
84 u32 pbl_buf_size_in_bytes;
85 u8 physically_continuous;
86};
87
88static inline struct efa_dev *to_edev(struct ib_device *ibdev)
89{
90 return container_of(ibdev, struct efa_dev, ibdev);
91}
92
93static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
94{
95 return container_of(ibucontext, struct efa_ucontext, ibucontext);
96}
97
98static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
99{
100 return container_of(ibpd, struct efa_pd, ibpd);
101}
102
103static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
104{
105 return container_of(ibmr, struct efa_mr, ibmr);
106}
107
108static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
109{
110 return container_of(ibqp, struct efa_qp, ibqp);
111}
112
113static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
114{
115 return container_of(ibcq, struct efa_cq, ibcq);
116}
117
118static inline struct efa_ah *to_eah(struct ib_ah *ibah)
119{
120 return container_of(ibah, struct efa_ah, ibah);
121}
122
123#define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
124 sizeof(((typeof(x) *)0)->fld) <= (sz))
125
126#define is_reserved_cleared(reserved) \
127 !memchr_inv(reserved, 0, sizeof(reserved))
128
129static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
130 size_t size, enum dma_data_direction dir)
131{
132 void *addr;
133
134 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
135 if (!addr)
136 return NULL;
137
138 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
139 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
140 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
141 free_pages_exact(addr, size);
142 return NULL;
143 }
144
145 return addr;
146}
147
148/*
149 * This is only called when the ucontext is destroyed and there can be no
150 * concurrent query via mmap or allocate on the xarray, thus we can be sure no
151 * other thread is using the entry pointer. We also know that all the BAR
152 * pages have either been zap'd or munmaped at this point. Normal pages are
153 * refcounted and will be freed at the proper time.
154 */
155static void mmap_entries_remove_free(struct efa_dev *dev,
156 struct efa_ucontext *ucontext)
157{
158 struct efa_mmap_entry *entry;
159 unsigned long mmap_page;
160
161 xa_for_each(&ucontext->mmap_xa, mmap_page, entry) {
162 xa_erase(&ucontext->mmap_xa, mmap_page);
163
164 ibdev_dbg(
165 &dev->ibdev,
166 "mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
167 entry->obj, get_mmap_key(entry), entry->address,
168 entry->length);
169 if (entry->mmap_flag == EFA_MMAP_DMA_PAGE)
170 /* DMA mapping is already gone, now free the pages */
171 free_pages_exact(phys_to_virt(entry->address),
172 entry->length);
173 kfree(entry);
174 }
175}
176
177static struct efa_mmap_entry *mmap_entry_get(struct efa_dev *dev,
178 struct efa_ucontext *ucontext,
179 u64 key, u64 len)
180{
181 struct efa_mmap_entry *entry;
182 u64 mmap_page;
183
184 mmap_page = (key & EFA_MMAP_PAGE_MASK) >> PAGE_SHIFT;
185 if (mmap_page > U32_MAX)
186 return NULL;
187
188 entry = xa_load(&ucontext->mmap_xa, mmap_page);
189 if (!entry || get_mmap_key(entry) != key || entry->length != len)
190 return NULL;
191
192 ibdev_dbg(&dev->ibdev,
193 "mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
194 entry->obj, key, entry->address, entry->length);
195
196 return entry;
197}
198
199/*
200 * Note this locking scheme cannot support removal of entries, except during
201 * ucontext destruction when the core code guarentees no concurrency.
202 */
203static u64 mmap_entry_insert(struct efa_dev *dev, struct efa_ucontext *ucontext,
204 void *obj, u64 address, u64 length, u8 mmap_flag)
205{
206 struct efa_mmap_entry *entry;
207 int err;
208
209 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
210 if (!entry)
211 return EFA_MMAP_INVALID;
212
213 entry->obj = obj;
214 entry->address = address;
215 entry->length = length;
216 entry->mmap_flag = mmap_flag;
217
218 xa_lock(&ucontext->mmap_xa);
219 entry->mmap_page = ucontext->mmap_xa_page;
220 ucontext->mmap_xa_page += DIV_ROUND_UP(length, PAGE_SIZE);
221 err = __xa_insert(&ucontext->mmap_xa, entry->mmap_page, entry,
222 GFP_KERNEL);
223 xa_unlock(&ucontext->mmap_xa);
224 if (err){
225 kfree(entry);
226 return EFA_MMAP_INVALID;
227 }
228
229 ibdev_dbg(
230 &dev->ibdev,
231 "mmap: obj[0x%p] addr[%#llx], len[%#llx], key[%#llx] inserted\n",
232 entry->obj, entry->address, entry->length, get_mmap_key(entry));
233
234 return get_mmap_key(entry);
235}
236
237int efa_query_device(struct ib_device *ibdev,
238 struct ib_device_attr *props,
239 struct ib_udata *udata)
240{
241 struct efa_com_get_device_attr_result *dev_attr;
242 struct efa_ibv_ex_query_device_resp resp = {};
243 struct efa_dev *dev = to_edev(ibdev);
244 int err;
245
246 if (udata && udata->inlen &&
247 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
248 ibdev_dbg(ibdev,
249 "Incompatible ABI params, udata not cleared\n");
250 return -EINVAL;
251 }
252
253 dev_attr = &dev->dev_attr;
254
255 memset(props, 0, sizeof(*props));
256 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
257 props->page_size_cap = dev_attr->page_size_cap;
258 props->vendor_id = dev->pdev->vendor;
259 props->vendor_part_id = dev->pdev->device;
260 props->hw_ver = dev->pdev->subsystem_device;
261 props->max_qp = dev_attr->max_qp;
262 props->max_cq = dev_attr->max_cq;
263 props->max_pd = dev_attr->max_pd;
264 props->max_mr = dev_attr->max_mr;
265 props->max_ah = dev_attr->max_ah;
266 props->max_cqe = dev_attr->max_cq_depth;
267 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
268 dev_attr->max_rq_depth);
269 props->max_send_sge = dev_attr->max_sq_sge;
270 props->max_recv_sge = dev_attr->max_rq_sge;
271
272 if (udata && udata->outlen) {
273 resp.max_sq_sge = dev_attr->max_sq_sge;
274 resp.max_rq_sge = dev_attr->max_rq_sge;
275 resp.max_sq_wr = dev_attr->max_sq_depth;
276 resp.max_rq_wr = dev_attr->max_rq_depth;
277
278 err = ib_copy_to_udata(udata, &resp,
279 min(sizeof(resp), udata->outlen));
280 if (err) {
281 ibdev_dbg(ibdev,
282 "Failed to copy udata for query_device\n");
283 return err;
284 }
285 }
286
287 return 0;
288}
289
290int efa_query_port(struct ib_device *ibdev, u8 port,
291 struct ib_port_attr *props)
292{
293 struct efa_dev *dev = to_edev(ibdev);
294
295 props->lmc = 1;
296
297 props->state = IB_PORT_ACTIVE;
298 props->phys_state = 5;
299 props->gid_tbl_len = 1;
300 props->pkey_tbl_len = 1;
301 props->active_speed = IB_SPEED_EDR;
302 props->active_width = IB_WIDTH_4X;
303 props->max_mtu = ib_mtu_int_to_enum(dev->mtu);
304 props->active_mtu = ib_mtu_int_to_enum(dev->mtu);
305 props->max_msg_sz = dev->mtu;
306 props->max_vl_num = 1;
307
308 return 0;
309}
310
311int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
312 int qp_attr_mask,
313 struct ib_qp_init_attr *qp_init_attr)
314{
315 struct efa_dev *dev = to_edev(ibqp->device);
316 struct efa_com_query_qp_params params = {};
317 struct efa_com_query_qp_result result;
318 struct efa_qp *qp = to_eqp(ibqp);
319 int err;
320
321#define EFA_QUERY_QP_SUPP_MASK \
322 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
323 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
324
325 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
326 ibdev_dbg(&dev->ibdev,
327 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
328 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
329 return -EOPNOTSUPP;
330 }
331
332 memset(qp_attr, 0, sizeof(*qp_attr));
333 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
334
335 params.qp_handle = qp->qp_handle;
336 err = efa_com_query_qp(&dev->edev, &params, &result);
337 if (err)
338 return err;
339
340 qp_attr->qp_state = result.qp_state;
341 qp_attr->qkey = result.qkey;
342 qp_attr->sq_psn = result.sq_psn;
343 qp_attr->sq_draining = result.sq_draining;
344 qp_attr->port_num = 1;
345
346 qp_attr->cap.max_send_wr = qp->max_send_wr;
347 qp_attr->cap.max_recv_wr = qp->max_recv_wr;
348 qp_attr->cap.max_send_sge = qp->max_send_sge;
349 qp_attr->cap.max_recv_sge = qp->max_recv_sge;
350 qp_attr->cap.max_inline_data = qp->max_inline_data;
351
352 qp_init_attr->qp_type = ibqp->qp_type;
353 qp_init_attr->recv_cq = ibqp->recv_cq;
354 qp_init_attr->send_cq = ibqp->send_cq;
355 qp_init_attr->qp_context = ibqp->qp_context;
356 qp_init_attr->cap = qp_attr->cap;
357
358 return 0;
359}
360
361int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
362 union ib_gid *gid)
363{
364 struct efa_dev *dev = to_edev(ibdev);
365
366 memcpy(gid->raw, dev->addr, sizeof(dev->addr));
367
368 return 0;
369}
370
371int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
372 u16 *pkey)
373{
374 if (index > 0)
375 return -EINVAL;
376
377 *pkey = 0xffff;
378 return 0;
379}
380
381static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
382{
383 struct efa_com_dealloc_pd_params params = {
384 .pdn = pdn,
385 };
386
387 return efa_com_dealloc_pd(&dev->edev, &params);
388}
389
390int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
391{
392 struct efa_dev *dev = to_edev(ibpd->device);
393 struct efa_ibv_alloc_pd_resp resp = {};
394 struct efa_com_alloc_pd_result result;
395 struct efa_pd *pd = to_epd(ibpd);
396 int err;
397
398 if (udata->inlen &&
399 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
400 ibdev_dbg(&dev->ibdev,
401 "Incompatible ABI params, udata not cleared\n");
402 err = -EINVAL;
403 goto err_out;
404 }
405
406 err = efa_com_alloc_pd(&dev->edev, &result);
407 if (err)
408 goto err_out;
409
410 pd->pdn = result.pdn;
411 resp.pdn = result.pdn;
412
413 if (udata->outlen) {
414 err = ib_copy_to_udata(udata, &resp,
415 min(sizeof(resp), udata->outlen));
416 if (err) {
417 ibdev_dbg(&dev->ibdev,
418 "Failed to copy udata for alloc_pd\n");
419 goto err_dealloc_pd;
420 }
421 }
422
423 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
424
425 return 0;
426
427err_dealloc_pd:
428 efa_pd_dealloc(dev, result.pdn);
429err_out:
430 atomic64_inc(&dev->stats.sw_stats.alloc_pd_err);
431 return err;
432}
433
434void efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
435{
436 struct efa_dev *dev = to_edev(ibpd->device);
437 struct efa_pd *pd = to_epd(ibpd);
438
439 if (udata->inlen &&
440 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
441 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
442 return;
443 }
444
445 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
446 efa_pd_dealloc(dev, pd->pdn);
447}
448
449static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
450{
451 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
452
453 return efa_com_destroy_qp(&dev->edev, &params);
454}
455
456int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
457{
458 struct efa_dev *dev = to_edev(ibqp->pd->device);
459 struct efa_qp *qp = to_eqp(ibqp);
460 int err;
461
462 if (udata->inlen &&
463 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
464 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
465 return -EINVAL;
466 }
467
468 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
469 err = efa_destroy_qp_handle(dev, qp->qp_handle);
470 if (err)
471 return err;
472
473 if (qp->rq_cpu_addr) {
474 ibdev_dbg(&dev->ibdev,
475 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
476 qp->rq_cpu_addr, qp->rq_size,
477 &qp->rq_dma_addr);
478 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
479 DMA_TO_DEVICE);
480 }
481
482 kfree(qp);
483 return 0;
484}
485
486static int qp_mmap_entries_setup(struct efa_qp *qp,
487 struct efa_dev *dev,
488 struct efa_ucontext *ucontext,
489 struct efa_com_create_qp_params *params,
490 struct efa_ibv_create_qp_resp *resp)
491{
492 /*
493 * Once an entry is inserted it might be mmapped, hence cannot be
494 * cleaned up until dealloc_ucontext.
495 */
496 resp->sq_db_mmap_key =
497 mmap_entry_insert(dev, ucontext, qp,
498 dev->db_bar_addr + resp->sq_db_offset,
499 PAGE_SIZE, EFA_MMAP_IO_NC);
500 if (resp->sq_db_mmap_key == EFA_MMAP_INVALID)
501 return -ENOMEM;
502
503 resp->sq_db_offset &= ~PAGE_MASK;
504
505 resp->llq_desc_mmap_key =
506 mmap_entry_insert(dev, ucontext, qp,
507 dev->mem_bar_addr + resp->llq_desc_offset,
508 PAGE_ALIGN(params->sq_ring_size_in_bytes +
509 (resp->llq_desc_offset & ~PAGE_MASK)),
510 EFA_MMAP_IO_WC);
511 if (resp->llq_desc_mmap_key == EFA_MMAP_INVALID)
512 return -ENOMEM;
513
514 resp->llq_desc_offset &= ~PAGE_MASK;
515
516 if (qp->rq_size) {
517 resp->rq_db_mmap_key =
518 mmap_entry_insert(dev, ucontext, qp,
519 dev->db_bar_addr + resp->rq_db_offset,
520 PAGE_SIZE, EFA_MMAP_IO_NC);
521 if (resp->rq_db_mmap_key == EFA_MMAP_INVALID)
522 return -ENOMEM;
523
524 resp->rq_db_offset &= ~PAGE_MASK;
525
526 resp->rq_mmap_key =
527 mmap_entry_insert(dev, ucontext, qp,
528 virt_to_phys(qp->rq_cpu_addr),
529 qp->rq_size, EFA_MMAP_DMA_PAGE);
530 if (resp->rq_mmap_key == EFA_MMAP_INVALID)
531 return -ENOMEM;
532
533 resp->rq_mmap_size = qp->rq_size;
534 }
535
536 return 0;
537}
538
539static int efa_qp_validate_cap(struct efa_dev *dev,
540 struct ib_qp_init_attr *init_attr)
541{
542 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
543 ibdev_dbg(&dev->ibdev,
544 "qp: requested send wr[%u] exceeds the max[%u]\n",
545 init_attr->cap.max_send_wr,
546 dev->dev_attr.max_sq_depth);
547 return -EINVAL;
548 }
549 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
550 ibdev_dbg(&dev->ibdev,
551 "qp: requested receive wr[%u] exceeds the max[%u]\n",
552 init_attr->cap.max_recv_wr,
553 dev->dev_attr.max_rq_depth);
554 return -EINVAL;
555 }
556 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
557 ibdev_dbg(&dev->ibdev,
558 "qp: requested sge send[%u] exceeds the max[%u]\n",
559 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
560 return -EINVAL;
561 }
562 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
563 ibdev_dbg(&dev->ibdev,
564 "qp: requested sge recv[%u] exceeds the max[%u]\n",
565 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
566 return -EINVAL;
567 }
568 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
569 ibdev_dbg(&dev->ibdev,
570 "qp: requested inline data[%u] exceeds the max[%u]\n",
571 init_attr->cap.max_inline_data,
572 dev->dev_attr.inline_buf_size);
573 return -EINVAL;
574 }
575
576 return 0;
577}
578
579static int efa_qp_validate_attr(struct efa_dev *dev,
580 struct ib_qp_init_attr *init_attr)
581{
582 if (init_attr->qp_type != IB_QPT_DRIVER &&
583 init_attr->qp_type != IB_QPT_UD) {
584 ibdev_dbg(&dev->ibdev,
585 "Unsupported qp type %d\n", init_attr->qp_type);
586 return -EOPNOTSUPP;
587 }
588
589 if (init_attr->srq) {
590 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
591 return -EOPNOTSUPP;
592 }
593
594 if (init_attr->create_flags) {
595 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
596 return -EOPNOTSUPP;
597 }
598
599 return 0;
600}
601
602struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
603 struct ib_qp_init_attr *init_attr,
604 struct ib_udata *udata)
605{
606 struct efa_com_create_qp_params create_qp_params = {};
607 struct efa_com_create_qp_result create_qp_resp;
608 struct efa_dev *dev = to_edev(ibpd->device);
609 struct efa_ibv_create_qp_resp resp = {};
610 struct efa_ibv_create_qp cmd = {};
611 bool rq_entry_inserted = false;
612 struct efa_ucontext *ucontext;
613 struct efa_qp *qp;
614 int err;
615
616 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
617 ibucontext);
618
619 err = efa_qp_validate_cap(dev, init_attr);
620 if (err)
621 goto err_out;
622
623 err = efa_qp_validate_attr(dev, init_attr);
624 if (err)
625 goto err_out;
626
627 if (!field_avail(cmd, driver_qp_type, udata->inlen)) {
628 ibdev_dbg(&dev->ibdev,
629 "Incompatible ABI params, no input udata\n");
630 err = -EINVAL;
631 goto err_out;
632 }
633
634 if (udata->inlen > sizeof(cmd) &&
635 !ib_is_udata_cleared(udata, sizeof(cmd),
636 udata->inlen - sizeof(cmd))) {
637 ibdev_dbg(&dev->ibdev,
638 "Incompatible ABI params, unknown fields in udata\n");
639 err = -EINVAL;
640 goto err_out;
641 }
642
643 err = ib_copy_from_udata(&cmd, udata,
644 min(sizeof(cmd), udata->inlen));
645 if (err) {
646 ibdev_dbg(&dev->ibdev,
647 "Cannot copy udata for create_qp\n");
648 goto err_out;
649 }
650
651 if (cmd.comp_mask) {
652 ibdev_dbg(&dev->ibdev,
653 "Incompatible ABI params, unknown fields in udata\n");
654 err = -EINVAL;
655 goto err_out;
656 }
657
658 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
659 if (!qp) {
660 err = -ENOMEM;
661 goto err_out;
662 }
663
664 create_qp_params.uarn = ucontext->uarn;
665 create_qp_params.pd = to_epd(ibpd)->pdn;
666
667 if (init_attr->qp_type == IB_QPT_UD) {
668 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
669 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
670 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
671 } else {
672 ibdev_dbg(&dev->ibdev,
673 "Unsupported qp type %d driver qp type %d\n",
674 init_attr->qp_type, cmd.driver_qp_type);
675 err = -EOPNOTSUPP;
676 goto err_free_qp;
677 }
678
679 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
680 init_attr->qp_type, cmd.driver_qp_type);
681 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
682 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
683 create_qp_params.sq_depth = init_attr->cap.max_send_wr;
684 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
685
686 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
687 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
688 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
689 if (qp->rq_size) {
690 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
691 qp->rq_size, DMA_TO_DEVICE);
692 if (!qp->rq_cpu_addr) {
693 err = -ENOMEM;
694 goto err_free_qp;
695 }
696
697 ibdev_dbg(&dev->ibdev,
698 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
699 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
700 create_qp_params.rq_base_addr = qp->rq_dma_addr;
701 }
702
703 err = efa_com_create_qp(&dev->edev, &create_qp_params,
704 &create_qp_resp);
705 if (err)
706 goto err_free_mapped;
707
708 resp.sq_db_offset = create_qp_resp.sq_db_offset;
709 resp.rq_db_offset = create_qp_resp.rq_db_offset;
710 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
711 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
712 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
713
714 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
715 &resp);
716 if (err)
717 goto err_destroy_qp;
718
719 rq_entry_inserted = true;
720 qp->qp_handle = create_qp_resp.qp_handle;
721 qp->ibqp.qp_num = create_qp_resp.qp_num;
722 qp->ibqp.qp_type = init_attr->qp_type;
723 qp->max_send_wr = init_attr->cap.max_send_wr;
724 qp->max_recv_wr = init_attr->cap.max_recv_wr;
725 qp->max_send_sge = init_attr->cap.max_send_sge;
726 qp->max_recv_sge = init_attr->cap.max_recv_sge;
727 qp->max_inline_data = init_attr->cap.max_inline_data;
728
729 if (udata->outlen) {
730 err = ib_copy_to_udata(udata, &resp,
731 min(sizeof(resp), udata->outlen));
732 if (err) {
733 ibdev_dbg(&dev->ibdev,
734 "Failed to copy udata for qp[%u]\n",
735 create_qp_resp.qp_num);
736 goto err_destroy_qp;
737 }
738 }
739
740 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
741
742 return &qp->ibqp;
743
744err_destroy_qp:
745 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
746err_free_mapped:
747 if (qp->rq_size) {
748 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
749 DMA_TO_DEVICE);
750 if (!rq_entry_inserted)
751 free_pages_exact(qp->rq_cpu_addr, qp->rq_size);
752 }
753err_free_qp:
754 kfree(qp);
755err_out:
756 atomic64_inc(&dev->stats.sw_stats.create_qp_err);
757 return ERR_PTR(err);
758}
759
760static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
761 struct ib_qp_attr *qp_attr, int qp_attr_mask,
762 enum ib_qp_state cur_state,
763 enum ib_qp_state new_state)
764{
765#define EFA_MODIFY_QP_SUPP_MASK \
766 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
767 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
768
769 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
770 ibdev_dbg(&dev->ibdev,
771 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
772 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
773 return -EOPNOTSUPP;
774 }
775
776 if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
777 qp_attr_mask)) {
778 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
779 return -EINVAL;
780 }
781
782 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
783 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
784 return -EOPNOTSUPP;
785 }
786
787 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
788 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
789 return -EOPNOTSUPP;
790 }
791
792 return 0;
793}
794
795int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
796 int qp_attr_mask, struct ib_udata *udata)
797{
798 struct efa_dev *dev = to_edev(ibqp->device);
799 struct efa_com_modify_qp_params params = {};
800 struct efa_qp *qp = to_eqp(ibqp);
801 enum ib_qp_state cur_state;
802 enum ib_qp_state new_state;
803 int err;
804
805 if (udata->inlen &&
806 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
807 ibdev_dbg(&dev->ibdev,
808 "Incompatible ABI params, udata not cleared\n");
809 return -EINVAL;
810 }
811
812 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
813 qp->state;
814 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
815
816 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
817 new_state);
818 if (err)
819 return err;
820
821 params.qp_handle = qp->qp_handle;
822
823 if (qp_attr_mask & IB_QP_STATE) {
824 params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
825 BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
826 params.cur_qp_state = qp_attr->cur_qp_state;
827 params.qp_state = qp_attr->qp_state;
828 }
829
830 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
831 params.modify_mask |=
832 BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
833 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
834 }
835
836 if (qp_attr_mask & IB_QP_QKEY) {
837 params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
838 params.qkey = qp_attr->qkey;
839 }
840
841 if (qp_attr_mask & IB_QP_SQ_PSN) {
842 params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
843 params.sq_psn = qp_attr->sq_psn;
844 }
845
846 err = efa_com_modify_qp(&dev->edev, &params);
847 if (err)
848 return err;
849
850 qp->state = new_state;
851
852 return 0;
853}
854
855static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
856{
857 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
858
859 return efa_com_destroy_cq(&dev->edev, &params);
860}
861
862int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
863{
864 struct efa_dev *dev = to_edev(ibcq->device);
865 struct efa_cq *cq = to_ecq(ibcq);
866 int err;
867
868 if (udata->inlen &&
869 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
870 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
871 return -EINVAL;
872 }
873
874 ibdev_dbg(&dev->ibdev,
875 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
876 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
877
878 err = efa_destroy_cq_idx(dev, cq->cq_idx);
879 if (err)
880 return err;
881
882 dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
883 DMA_FROM_DEVICE);
884
885 kfree(cq);
886 return 0;
887}
888
889static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
890 struct efa_ibv_create_cq_resp *resp)
891{
892 resp->q_mmap_size = cq->size;
893 resp->q_mmap_key = mmap_entry_insert(dev, cq->ucontext, cq,
894 virt_to_phys(cq->cpu_addr),
895 cq->size, EFA_MMAP_DMA_PAGE);
896 if (resp->q_mmap_key == EFA_MMAP_INVALID)
897 return -ENOMEM;
898
899 return 0;
900}
901
902static struct ib_cq *do_create_cq(struct ib_device *ibdev, int entries,
903 int vector, struct ib_ucontext *ibucontext,
904 struct ib_udata *udata)
905{
906 struct efa_ibv_create_cq_resp resp = {};
907 struct efa_com_create_cq_params params;
908 struct efa_com_create_cq_result result;
909 struct efa_dev *dev = to_edev(ibdev);
910 struct efa_ibv_create_cq cmd = {};
911 bool cq_entry_inserted = false;
912 struct efa_cq *cq;
913 int err;
914
915 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
916
917 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
918 ibdev_dbg(ibdev,
919 "cq: requested entries[%u] non-positive or greater than max[%u]\n",
920 entries, dev->dev_attr.max_cq_depth);
921 err = -EINVAL;
922 goto err_out;
923 }
924
925 if (!field_avail(cmd, num_sub_cqs, udata->inlen)) {
926 ibdev_dbg(ibdev,
927 "Incompatible ABI params, no input udata\n");
928 err = -EINVAL;
929 goto err_out;
930 }
931
932 if (udata->inlen > sizeof(cmd) &&
933 !ib_is_udata_cleared(udata, sizeof(cmd),
934 udata->inlen - sizeof(cmd))) {
935 ibdev_dbg(ibdev,
936 "Incompatible ABI params, unknown fields in udata\n");
937 err = -EINVAL;
938 goto err_out;
939 }
940
941 err = ib_copy_from_udata(&cmd, udata,
942 min(sizeof(cmd), udata->inlen));
943 if (err) {
944 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
945 goto err_out;
946 }
947
948 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
949 ibdev_dbg(ibdev,
950 "Incompatible ABI params, unknown fields in udata\n");
951 err = -EINVAL;
952 goto err_out;
953 }
954
955 if (!cmd.cq_entry_size) {
956 ibdev_dbg(ibdev,
957 "Invalid entry size [%u]\n", cmd.cq_entry_size);
958 err = -EINVAL;
959 goto err_out;
960 }
961
962 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
963 ibdev_dbg(ibdev,
964 "Invalid number of sub cqs[%u] expected[%u]\n",
965 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
966 err = -EINVAL;
967 goto err_out;
968 }
969
970 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
971 if (!cq) {
972 err = -ENOMEM;
973 goto err_out;
974 }
975
976 cq->ucontext = to_eucontext(ibucontext);
977 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
978 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
979 DMA_FROM_DEVICE);
980 if (!cq->cpu_addr) {
981 err = -ENOMEM;
982 goto err_free_cq;
983 }
984
985 params.uarn = cq->ucontext->uarn;
986 params.cq_depth = entries;
987 params.dma_addr = cq->dma_addr;
988 params.entry_size_in_bytes = cmd.cq_entry_size;
989 params.num_sub_cqs = cmd.num_sub_cqs;
990 err = efa_com_create_cq(&dev->edev, &params, &result);
991 if (err)
992 goto err_free_mapped;
993
994 resp.cq_idx = result.cq_idx;
995 cq->cq_idx = result.cq_idx;
996 cq->ibcq.cqe = result.actual_depth;
997 WARN_ON_ONCE(entries != result.actual_depth);
998
999 err = cq_mmap_entries_setup(dev, cq, &resp);
1000 if (err) {
1001 ibdev_dbg(ibdev,
1002 "Could not setup cq[%u] mmap entries\n", cq->cq_idx);
1003 goto err_destroy_cq;
1004 }
1005
1006 cq_entry_inserted = true;
1007
1008 if (udata->outlen) {
1009 err = ib_copy_to_udata(udata, &resp,
1010 min(sizeof(resp), udata->outlen));
1011 if (err) {
1012 ibdev_dbg(ibdev,
1013 "Failed to copy udata for create_cq\n");
1014 goto err_destroy_cq;
1015 }
1016 }
1017
1018 ibdev_dbg(ibdev,
1019 "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1020 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1021
1022 return &cq->ibcq;
1023
1024err_destroy_cq:
1025 efa_destroy_cq_idx(dev, cq->cq_idx);
1026err_free_mapped:
1027 dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
1028 DMA_FROM_DEVICE);
1029 if (!cq_entry_inserted)
1030 free_pages_exact(cq->cpu_addr, cq->size);
1031err_free_cq:
1032 kfree(cq);
1033err_out:
1034 atomic64_inc(&dev->stats.sw_stats.create_cq_err);
1035 return ERR_PTR(err);
1036}
1037
1038struct ib_cq *efa_create_cq(struct ib_device *ibdev,
1039 const struct ib_cq_init_attr *attr,
1040 struct ib_udata *udata)
1041{
1042 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(udata,
1043 struct efa_ucontext,
1044 ibucontext);
1045
1046 return do_create_cq(ibdev, attr->cqe, attr->comp_vector,
1047 &ucontext->ibucontext, udata);
1048}
1049
1050static int umem_to_page_list(struct efa_dev *dev,
1051 struct ib_umem *umem,
1052 u64 *page_list,
1053 u32 hp_cnt,
1054 u8 hp_shift)
1055{
1056 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1057 struct sg_dma_page_iter sg_iter;
1058 unsigned int page_idx = 0;
1059 unsigned int hp_idx = 0;
1060
1061 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1062 hp_cnt, pages_in_hp);
1063
1064 for_each_sg_dma_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
1065 if (page_idx % pages_in_hp == 0) {
1066 page_list[hp_idx] = sg_page_iter_dma_address(&sg_iter);
1067 hp_idx++;
1068 }
1069
1070 page_idx++;
1071 }
1072
1073 return 0;
1074}
1075
1076static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1077{
1078 struct scatterlist *sglist;
1079 struct page *pg;
1080 int i;
1081
1082 sglist = kcalloc(page_cnt, sizeof(*sglist), GFP_KERNEL);
1083 if (!sglist)
1084 return NULL;
1085 sg_init_table(sglist, page_cnt);
1086 for (i = 0; i < page_cnt; i++) {
1087 pg = vmalloc_to_page(buf);
1088 if (!pg)
1089 goto err;
1090 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1091 buf += PAGE_SIZE / sizeof(*buf);
1092 }
1093 return sglist;
1094
1095err:
1096 kfree(sglist);
1097 return NULL;
1098}
1099
1100/*
1101 * create a chunk list of physical pages dma addresses from the supplied
1102 * scatter gather list
1103 */
1104static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1105{
1106 unsigned int entry, payloads_in_sg, chunk_list_size, chunk_idx, payload_idx;
1107 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1108 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1109 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1110 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1111 struct efa_com_ctrl_buff_info *ctrl_buf;
1112 u64 *cur_chunk_buf, *prev_chunk_buf;
1113 struct scatterlist *sg;
1114 dma_addr_t dma_addr;
1115 int i;
1116
1117 /* allocate a chunk list that consists of 4KB chunks */
1118 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1119
1120 chunk_list->size = chunk_list_size;
1121 chunk_list->chunks = kcalloc(chunk_list_size,
1122 sizeof(*chunk_list->chunks),
1123 GFP_KERNEL);
1124 if (!chunk_list->chunks)
1125 return -ENOMEM;
1126
1127 ibdev_dbg(&dev->ibdev,
1128 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1129 page_cnt);
1130
1131 /* allocate chunk buffers: */
1132 for (i = 0; i < chunk_list_size; i++) {
1133 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1134 if (!chunk_list->chunks[i].buf)
1135 goto chunk_list_dealloc;
1136
1137 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1138 }
1139 chunk_list->chunks[chunk_list_size - 1].length =
1140 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1141 EFA_CHUNK_PTR_SIZE;
1142
1143 /* fill the dma addresses of sg list pages to chunks: */
1144 chunk_idx = 0;
1145 payload_idx = 0;
1146 cur_chunk_buf = chunk_list->chunks[0].buf;
1147 for_each_sg(pages_sgl, sg, sg_dma_cnt, entry) {
1148 payloads_in_sg = sg_dma_len(sg) >> EFA_CHUNK_PAYLOAD_SHIFT;
1149 for (i = 0; i < payloads_in_sg; i++) {
1150 cur_chunk_buf[payload_idx++] =
1151 (sg_dma_address(sg) & ~(EFA_CHUNK_PAYLOAD_SIZE - 1)) +
1152 (EFA_CHUNK_PAYLOAD_SIZE * i);
1153
1154 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1155 chunk_idx++;
1156 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1157 payload_idx = 0;
1158 }
1159 }
1160 }
1161
1162 /* map chunks to dma and fill chunks next ptrs */
1163 for (i = chunk_list_size - 1; i >= 0; i--) {
1164 dma_addr = dma_map_single(&dev->pdev->dev,
1165 chunk_list->chunks[i].buf,
1166 chunk_list->chunks[i].length,
1167 DMA_TO_DEVICE);
1168 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1169 ibdev_err(&dev->ibdev,
1170 "chunk[%u] dma_map_failed\n", i);
1171 goto chunk_list_unmap;
1172 }
1173
1174 chunk_list->chunks[i].dma_addr = dma_addr;
1175 ibdev_dbg(&dev->ibdev,
1176 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1177
1178 if (!i)
1179 break;
1180
1181 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1182
1183 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1184 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1185 ctrl_buf->length = chunk_list->chunks[i].length;
1186
1187 efa_com_set_dma_addr(dma_addr,
1188 &ctrl_buf->address.mem_addr_high,
1189 &ctrl_buf->address.mem_addr_low);
1190 }
1191
1192 return 0;
1193
1194chunk_list_unmap:
1195 for (; i < chunk_list_size; i++) {
1196 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1197 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1198 }
1199chunk_list_dealloc:
1200 for (i = 0; i < chunk_list_size; i++)
1201 kfree(chunk_list->chunks[i].buf);
1202
1203 kfree(chunk_list->chunks);
1204 return -ENOMEM;
1205}
1206
1207static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1208{
1209 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1210 int i;
1211
1212 for (i = 0; i < chunk_list->size; i++) {
1213 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1214 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1215 kfree(chunk_list->chunks[i].buf);
1216 }
1217
1218 kfree(chunk_list->chunks);
1219}
1220
1221/* initialize pbl continuous mode: map pbl buffer to a dma address. */
1222static int pbl_continuous_initialize(struct efa_dev *dev,
1223 struct pbl_context *pbl)
1224{
1225 dma_addr_t dma_addr;
1226
1227 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1228 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1229 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1230 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1231 return -ENOMEM;
1232 }
1233
1234 pbl->phys.continuous.dma_addr = dma_addr;
1235 ibdev_dbg(&dev->ibdev,
1236 "pbl continuous - dma_addr = %pad, size[%u]\n",
1237 &dma_addr, pbl->pbl_buf_size_in_bytes);
1238
1239 return 0;
1240}
1241
1242/*
1243 * initialize pbl indirect mode:
1244 * create a chunk list out of the dma addresses of the physical pages of
1245 * pbl buffer.
1246 */
1247static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1248{
1249 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
1250 struct scatterlist *sgl;
1251 int sg_dma_cnt, err;
1252
1253 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1254 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1255 if (!sgl)
1256 return -ENOMEM;
1257
1258 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1259 if (!sg_dma_cnt) {
1260 err = -EINVAL;
1261 goto err_map;
1262 }
1263
1264 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1265 pbl->phys.indirect.sgl = sgl;
1266 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1267 err = pbl_chunk_list_create(dev, pbl);
1268 if (err) {
1269 ibdev_dbg(&dev->ibdev,
1270 "chunk_list creation failed[%d]\n", err);
1271 goto err_chunk;
1272 }
1273
1274 ibdev_dbg(&dev->ibdev,
1275 "pbl indirect - size[%u], chunks[%u]\n",
1276 pbl->pbl_buf_size_in_bytes,
1277 pbl->phys.indirect.chunk_list.size);
1278
1279 return 0;
1280
1281err_chunk:
1282 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1283err_map:
1284 kfree(sgl);
1285 return err;
1286}
1287
1288static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1289{
1290 pbl_chunk_list_destroy(dev, pbl);
1291 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1292 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1293 kfree(pbl->phys.indirect.sgl);
1294}
1295
1296/* create a page buffer list from a mapped user memory region */
1297static int pbl_create(struct efa_dev *dev,
1298 struct pbl_context *pbl,
1299 struct ib_umem *umem,
1300 int hp_cnt,
1301 u8 hp_shift)
1302{
1303 int err;
1304
1305 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1306 pbl->pbl_buf = kzalloc(pbl->pbl_buf_size_in_bytes,
1307 GFP_KERNEL | __GFP_NOWARN);
1308 if (pbl->pbl_buf) {
1309 pbl->physically_continuous = 1;
1310 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1311 hp_shift);
1312 if (err)
1313 goto err_continuous;
1314 err = pbl_continuous_initialize(dev, pbl);
1315 if (err)
1316 goto err_continuous;
1317 } else {
1318 pbl->physically_continuous = 0;
1319 pbl->pbl_buf = vzalloc(pbl->pbl_buf_size_in_bytes);
1320 if (!pbl->pbl_buf)
1321 return -ENOMEM;
1322
1323 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1324 hp_shift);
1325 if (err)
1326 goto err_indirect;
1327 err = pbl_indirect_initialize(dev, pbl);
1328 if (err)
1329 goto err_indirect;
1330 }
1331
1332 ibdev_dbg(&dev->ibdev,
1333 "user_pbl_created: user_pages[%u], continuous[%u]\n",
1334 hp_cnt, pbl->physically_continuous);
1335
1336 return 0;
1337
1338err_continuous:
1339 kfree(pbl->pbl_buf);
1340 return err;
1341err_indirect:
1342 vfree(pbl->pbl_buf);
1343 return err;
1344}
1345
1346static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1347{
1348 if (pbl->physically_continuous) {
1349 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1350 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1351 kfree(pbl->pbl_buf);
1352 } else {
1353 pbl_indirect_terminate(dev, pbl);
1354 vfree(pbl->pbl_buf);
1355 }
1356}
1357
1358static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1359 struct efa_com_reg_mr_params *params)
1360{
1361 int err;
1362
1363 params->inline_pbl = 1;
1364 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1365 params->page_num, params->page_shift);
1366 if (err)
1367 return err;
1368
1369 ibdev_dbg(&dev->ibdev,
1370 "inline_pbl_array - pages[%u]\n", params->page_num);
1371
1372 return 0;
1373}
1374
1375static int efa_create_pbl(struct efa_dev *dev,
1376 struct pbl_context *pbl,
1377 struct efa_mr *mr,
1378 struct efa_com_reg_mr_params *params)
1379{
1380 int err;
1381
1382 err = pbl_create(dev, pbl, mr->umem, params->page_num,
1383 params->page_shift);
1384 if (err) {
1385 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1386 return err;
1387 }
1388
1389 params->inline_pbl = 0;
1390 params->indirect = !pbl->physically_continuous;
1391 if (pbl->physically_continuous) {
1392 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1393
1394 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1395 &params->pbl.pbl.address.mem_addr_high,
1396 &params->pbl.pbl.address.mem_addr_low);
1397 } else {
1398 params->pbl.pbl.length =
1399 pbl->phys.indirect.chunk_list.chunks[0].length;
1400
1401 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1402 &params->pbl.pbl.address.mem_addr_high,
1403 &params->pbl.pbl.address.mem_addr_low);
1404 }
1405
1406 return 0;
1407}
1408
1409static void efa_cont_pages(struct ib_umem *umem, u64 addr,
1410 unsigned long max_page_shift,
1411 int *count, u8 *shift, u32 *ncont)
1412{
1413 struct scatterlist *sg;
1414 u64 base = ~0, p = 0;
1415 unsigned long tmp;
1416 unsigned long m;
1417 u64 len, pfn;
1418 int i = 0;
1419 int entry;
1420
1421 addr = addr >> PAGE_SHIFT;
1422 tmp = (unsigned long)addr;
1423 m = find_first_bit(&tmp, BITS_PER_LONG);
1424 if (max_page_shift)
1425 m = min_t(unsigned long, max_page_shift - PAGE_SHIFT, m);
1426
1427 for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
1428 len = DIV_ROUND_UP(sg_dma_len(sg), PAGE_SIZE);
1429 pfn = sg_dma_address(sg) >> PAGE_SHIFT;
1430 if (base + p != pfn) {
1431 /*
1432 * If either the offset or the new
1433 * base are unaligned update m
1434 */
1435 tmp = (unsigned long)(pfn | p);
1436 if (!IS_ALIGNED(tmp, 1 << m))
1437 m = find_first_bit(&tmp, BITS_PER_LONG);
1438
1439 base = pfn;
1440 p = 0;
1441 }
1442
1443 p += len;
1444 i += len;
1445 }
1446
1447 if (i) {
1448 m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m);
1449 *ncont = DIV_ROUND_UP(i, (1 << m));
1450 } else {
1451 m = 0;
1452 *ncont = 0;
1453 }
1454
1455 *shift = PAGE_SHIFT + m;
1456 *count = i;
1457}
1458
1459struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1460 u64 virt_addr, int access_flags,
1461 struct ib_udata *udata)
1462{
1463 struct efa_dev *dev = to_edev(ibpd->device);
1464 struct efa_com_reg_mr_params params = {};
1465 struct efa_com_reg_mr_result result = {};
1466 unsigned long max_page_shift;
1467 struct pbl_context pbl;
1468 struct efa_mr *mr;
1469 int inline_size;
1470 int npages;
1471 int err;
1472
1473 if (udata->inlen &&
1474 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1475 ibdev_dbg(&dev->ibdev,
1476 "Incompatible ABI params, udata not cleared\n");
1477 err = -EINVAL;
1478 goto err_out;
1479 }
1480
1481 if (access_flags & ~EFA_SUPPORTED_ACCESS_FLAGS) {
1482 ibdev_dbg(&dev->ibdev,
1483 "Unsupported access flags[%#x], supported[%#x]\n",
1484 access_flags, EFA_SUPPORTED_ACCESS_FLAGS);
1485 err = -EOPNOTSUPP;
1486 goto err_out;
1487 }
1488
1489 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1490 if (!mr) {
1491 err = -ENOMEM;
1492 goto err_out;
1493 }
1494
1495 mr->umem = ib_umem_get(udata, start, length, access_flags, 0);
1496 if (IS_ERR(mr->umem)) {
1497 err = PTR_ERR(mr->umem);
1498 ibdev_dbg(&dev->ibdev,
1499 "Failed to pin and map user space memory[%d]\n", err);
1500 goto err_free;
1501 }
1502
1503 params.pd = to_epd(ibpd)->pdn;
1504 params.iova = virt_addr;
1505 params.mr_length_in_bytes = length;
1506 params.permissions = access_flags & 0x1;
1507 max_page_shift = fls64(dev->dev_attr.page_size_cap);
1508
1509 efa_cont_pages(mr->umem, start, max_page_shift, &npages,
1510 &params.page_shift, &params.page_num);
1511 ibdev_dbg(&dev->ibdev,
1512 "start %#llx length %#llx npages %d params.page_shift %u params.page_num %u\n",
1513 start, length, npages, params.page_shift, params.page_num);
1514
1515 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1516 if (params.page_num <= inline_size) {
1517 err = efa_create_inline_pbl(dev, mr, &params);
1518 if (err)
1519 goto err_unmap;
1520
1521 err = efa_com_register_mr(&dev->edev, &params, &result);
1522 if (err)
1523 goto err_unmap;
1524 } else {
1525 err = efa_create_pbl(dev, &pbl, mr, &params);
1526 if (err)
1527 goto err_unmap;
1528
1529 err = efa_com_register_mr(&dev->edev, &params, &result);
1530 pbl_destroy(dev, &pbl);
1531
1532 if (err)
1533 goto err_unmap;
1534 }
1535
1536 mr->ibmr.lkey = result.l_key;
1537 mr->ibmr.rkey = result.r_key;
1538 mr->ibmr.length = length;
1539 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1540
1541 return &mr->ibmr;
1542
1543err_unmap:
1544 ib_umem_release(mr->umem);
1545err_free:
1546 kfree(mr);
1547err_out:
1548 atomic64_inc(&dev->stats.sw_stats.reg_mr_err);
1549 return ERR_PTR(err);
1550}
1551
1552int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1553{
1554 struct efa_dev *dev = to_edev(ibmr->device);
1555 struct efa_com_dereg_mr_params params;
1556 struct efa_mr *mr = to_emr(ibmr);
1557 int err;
1558
1559 if (udata->inlen &&
1560 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1561 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1562 return -EINVAL;
1563 }
1564
1565 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1566
1567 if (mr->umem) {
1568 params.l_key = mr->ibmr.lkey;
1569 err = efa_com_dereg_mr(&dev->edev, &params);
1570 if (err)
1571 return err;
1572 ib_umem_release(mr->umem);
1573 }
1574
1575 kfree(mr);
1576
1577 return 0;
1578}
1579
1580int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
1581 struct ib_port_immutable *immutable)
1582{
1583 struct ib_port_attr attr;
1584 int err;
1585
1586 err = ib_query_port(ibdev, port_num, &attr);
1587 if (err) {
1588 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1589 return err;
1590 }
1591
1592 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1593 immutable->gid_tbl_len = attr.gid_tbl_len;
1594
1595 return 0;
1596}
1597
1598static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1599{
1600 struct efa_com_dealloc_uar_params params = {
1601 .uarn = uarn,
1602 };
1603
1604 return efa_com_dealloc_uar(&dev->edev, &params);
1605}
1606
1607int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1608{
1609 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1610 struct efa_dev *dev = to_edev(ibucontext->device);
1611 struct efa_ibv_alloc_ucontext_resp resp = {};
1612 struct efa_com_alloc_uar_result result;
1613 int err;
1614
1615 /*
1616 * it's fine if the driver does not know all request fields,
1617 * we will ack input fields in our response.
1618 */
1619
1620 err = efa_com_alloc_uar(&dev->edev, &result);
1621 if (err)
1622 goto err_out;
1623
1624 ucontext->uarn = result.uarn;
1625 xa_init(&ucontext->mmap_xa);
1626
1627 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1628 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1629 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1630 resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1631 resp.max_llq_size = dev->dev_attr.max_llq_size;
1632
1633 if (udata && udata->outlen) {
1634 err = ib_copy_to_udata(udata, &resp,
1635 min(sizeof(resp), udata->outlen));
1636 if (err)
1637 goto err_dealloc_uar;
1638 }
1639
1640 return 0;
1641
1642err_dealloc_uar:
1643 efa_dealloc_uar(dev, result.uarn);
1644err_out:
1645 atomic64_inc(&dev->stats.sw_stats.alloc_ucontext_err);
1646 return err;
1647}
1648
1649void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1650{
1651 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1652 struct efa_dev *dev = to_edev(ibucontext->device);
1653
1654 mmap_entries_remove_free(dev, ucontext);
1655 efa_dealloc_uar(dev, ucontext->uarn);
1656}
1657
1658static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1659 struct vm_area_struct *vma, u64 key, u64 length)
1660{
1661 struct efa_mmap_entry *entry;
1662 unsigned long va;
1663 u64 pfn;
1664 int err;
1665
1666 entry = mmap_entry_get(dev, ucontext, key, length);
1667 if (!entry) {
1668 ibdev_dbg(&dev->ibdev, "key[%#llx] does not have valid entry\n",
1669 key);
1670 return -EINVAL;
1671 }
1672
1673 ibdev_dbg(&dev->ibdev,
1674 "Mapping address[%#llx], length[%#llx], mmap_flag[%d]\n",
1675 entry->address, length, entry->mmap_flag);
1676
1677 pfn = entry->address >> PAGE_SHIFT;
1678 switch (entry->mmap_flag) {
1679 case EFA_MMAP_IO_NC:
1680 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
1681 pgprot_noncached(vma->vm_page_prot));
1682 break;
1683 case EFA_MMAP_IO_WC:
1684 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
1685 pgprot_writecombine(vma->vm_page_prot));
1686 break;
1687 case EFA_MMAP_DMA_PAGE:
1688 for (va = vma->vm_start; va < vma->vm_end;
1689 va += PAGE_SIZE, pfn++) {
1690 err = vm_insert_page(vma, va, pfn_to_page(pfn));
1691 if (err)
1692 break;
1693 }
1694 break;
1695 default:
1696 err = -EINVAL;
1697 }
1698
1699 if (err)
1700 ibdev_dbg(
1701 &dev->ibdev,
1702 "Couldn't mmap address[%#llx] length[%#llx] mmap_flag[%d] err[%d]\n",
1703 entry->address, length, entry->mmap_flag, err);
1704
1705 return err;
1706}
1707
1708int efa_mmap(struct ib_ucontext *ibucontext,
1709 struct vm_area_struct *vma)
1710{
1711 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1712 struct efa_dev *dev = to_edev(ibucontext->device);
1713 u64 length = vma->vm_end - vma->vm_start;
1714 u64 key = vma->vm_pgoff << PAGE_SHIFT;
1715
1716 ibdev_dbg(&dev->ibdev,
1717 "start %#lx, end %#lx, length = %#llx, key = %#llx\n",
1718 vma->vm_start, vma->vm_end, length, key);
1719
1720 if (length % PAGE_SIZE != 0 || !(vma->vm_flags & VM_SHARED)) {
1721 ibdev_dbg(&dev->ibdev,
1722 "length[%#llx] is not page size aligned[%#lx] or VM_SHARED is not set [%#lx]\n",
1723 length, PAGE_SIZE, vma->vm_flags);
1724 return -EINVAL;
1725 }
1726
1727 if (vma->vm_flags & VM_EXEC) {
1728 ibdev_dbg(&dev->ibdev, "Mapping executable pages is not permitted\n");
1729 return -EPERM;
1730 }
1731 vma->vm_flags &= ~VM_MAYEXEC;
1732
1733 return __efa_mmap(dev, ucontext, vma, key, length);
1734}
1735
1736static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1737{
1738 struct efa_com_destroy_ah_params params = {
1739 .ah = ah->ah,
1740 .pdn = to_epd(ah->ibah.pd)->pdn,
1741 };
1742
1743 return efa_com_destroy_ah(&dev->edev, &params);
1744}
1745
1746int efa_create_ah(struct ib_ah *ibah,
1747 struct rdma_ah_attr *ah_attr,
1748 u32 flags,
1749 struct ib_udata *udata)
1750{
1751 struct efa_dev *dev = to_edev(ibah->device);
1752 struct efa_com_create_ah_params params = {};
1753 struct efa_ibv_create_ah_resp resp = {};
1754 struct efa_com_create_ah_result result;
1755 struct efa_ah *ah = to_eah(ibah);
1756 int err;
1757
1758 if (!(flags & RDMA_CREATE_AH_SLEEPABLE)) {
1759 ibdev_dbg(&dev->ibdev,
1760 "Create address handle is not supported in atomic context\n");
1761 err = -EOPNOTSUPP;
1762 goto err_out;
1763 }
1764
1765 if (udata->inlen &&
1766 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1767 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1768 err = -EINVAL;
1769 goto err_out;
1770 }
1771
1772 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1773 sizeof(params.dest_addr));
1774 params.pdn = to_epd(ibah->pd)->pdn;
1775 err = efa_com_create_ah(&dev->edev, &params, &result);
1776 if (err)
1777 goto err_out;
1778
1779 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
1780 ah->ah = result.ah;
1781
1782 resp.efa_address_handle = result.ah;
1783
1784 if (udata->outlen) {
1785 err = ib_copy_to_udata(udata, &resp,
1786 min(sizeof(resp), udata->outlen));
1787 if (err) {
1788 ibdev_dbg(&dev->ibdev,
1789 "Failed to copy udata for create_ah response\n");
1790 goto err_destroy_ah;
1791 }
1792 }
1793 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
1794
1795 return 0;
1796
1797err_destroy_ah:
1798 efa_ah_destroy(dev, ah);
1799err_out:
1800 atomic64_inc(&dev->stats.sw_stats.create_ah_err);
1801 return err;
1802}
1803
1804void efa_destroy_ah(struct ib_ah *ibah, u32 flags)
1805{
1806 struct efa_dev *dev = to_edev(ibah->pd->device);
1807 struct efa_ah *ah = to_eah(ibah);
1808
1809 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
1810
1811 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
1812 ibdev_dbg(&dev->ibdev,
1813 "Destroy address handle is not supported in atomic context\n");
1814 return;
1815 }
1816
1817 efa_ah_destroy(dev, ah);
1818}
1819
1820enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
1821 u8 port_num)
1822{
1823 return IB_LINK_LAYER_UNSPECIFIED;
1824}
1825
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-02 08:57:14 -0500