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 op(EFA_RETRANS_BYTES, "retrans_bytes") \
68 op(EFA_RETRANS_PKTS, "retrans_pkts") \
69 op(EFA_RETRANS_TIMEOUT_EVENS, "retrans_timeout_events") \
70 op(EFA_UNRESPONSIVE_REMOTE_EVENTS, "unresponsive_remote_events") \
71 op(EFA_IMPAIRED_REMOTE_CONN_EVENTS, "impaired_remote_conn_events") \
72
73 #define EFA_STATS_ENUM(ename, name) ename,
74 #define EFA_STATS_STR(ename, nam) \
75 [ename].name = nam,
76
77 enum efa_hw_device_stats {
78 EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM)
79 };
80
81 static const struct rdma_stat_desc efa_device_stats_descs[] = {
82 EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR)
83 };
84
85 enum efa_hw_port_stats {
86 EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM)
87 };
88
89 static const struct rdma_stat_desc efa_port_stats_descs[] = {
90 EFA_DEFINE_PORT_STATS(EFA_STATS_STR)
91 };
92
93 #define EFA_DEFAULT_LINK_SPEED_GBPS 100
94
95 #define EFA_CHUNK_PAYLOAD_SHIFT 12
96 #define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
97 #define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
98
99 #define EFA_CHUNK_SHIFT 12
100 #define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
101 #define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
102
103 #define EFA_PTRS_PER_CHUNK \
104 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
105
106 #define EFA_CHUNK_USED_SIZE \
107 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
108
109 struct pbl_chunk {
110 dma_addr_t dma_addr;
111 u64 *buf;
112 u32 length;
113 };
114
115 struct pbl_chunk_list {
116 struct pbl_chunk *chunks;
117 unsigned int size;
118 };
119
120 struct pbl_context {
121 union {
122 struct {
123 dma_addr_t dma_addr;
124 } continuous;
125 struct {
126 u32 pbl_buf_size_in_pages;
127 struct scatterlist *sgl;
128 int sg_dma_cnt;
129 struct pbl_chunk_list chunk_list;
130 } indirect;
131 } phys;
132 u64 *pbl_buf;
133 u32 pbl_buf_size_in_bytes;
134 u8 physically_continuous;
135 };
136
to_edev(struct ib_device * ibdev)137 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
138 {
139 return container_of(ibdev, struct efa_dev, ibdev);
140 }
141
to_eucontext(struct ib_ucontext * ibucontext)142 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
143 {
144 return container_of(ibucontext, struct efa_ucontext, ibucontext);
145 }
146
to_epd(struct ib_pd * ibpd)147 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
148 {
149 return container_of(ibpd, struct efa_pd, ibpd);
150 }
151
to_emr(struct ib_mr * ibmr)152 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
153 {
154 return container_of(ibmr, struct efa_mr, ibmr);
155 }
156
to_eqp(struct ib_qp * ibqp)157 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
158 {
159 return container_of(ibqp, struct efa_qp, ibqp);
160 }
161
to_ecq(struct ib_cq * ibcq)162 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
163 {
164 return container_of(ibcq, struct efa_cq, ibcq);
165 }
166
to_eah(struct ib_ah * ibah)167 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
168 {
169 return container_of(ibah, struct efa_ah, ibah);
170 }
171
172 static inline struct efa_user_mmap_entry *
to_emmap(struct rdma_user_mmap_entry * rdma_entry)173 to_emmap(struct rdma_user_mmap_entry *rdma_entry)
174 {
175 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
176 }
177
178 #define EFA_DEV_CAP(dev, cap) \
179 ((dev)->dev_attr.device_caps & \
180 EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)
181
182 #define is_reserved_cleared(reserved) \
183 !memchr_inv(reserved, 0, sizeof(reserved))
184
efa_zalloc_mapped(struct efa_dev * dev,dma_addr_t * dma_addr,size_t size,enum dma_data_direction dir)185 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
186 size_t size, enum dma_data_direction dir)
187 {
188 void *addr;
189
190 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
191 if (!addr)
192 return NULL;
193
194 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
195 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
196 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
197 free_pages_exact(addr, size);
198 return NULL;
199 }
200
201 return addr;
202 }
203
efa_free_mapped(struct efa_dev * dev,void * cpu_addr,dma_addr_t dma_addr,size_t size,enum dma_data_direction dir)204 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
205 dma_addr_t dma_addr,
206 size_t size, enum dma_data_direction dir)
207 {
208 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
209 free_pages_exact(cpu_addr, size);
210 }
211
efa_query_device(struct ib_device * ibdev,struct ib_device_attr * props,struct ib_udata * udata)212 int efa_query_device(struct ib_device *ibdev,
213 struct ib_device_attr *props,
214 struct ib_udata *udata)
215 {
216 struct efa_com_get_device_attr_result *dev_attr;
217 struct efa_ibv_ex_query_device_resp resp = {};
218 struct efa_dev *dev = to_edev(ibdev);
219 int err;
220
221 if (udata && udata->inlen &&
222 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
223 ibdev_dbg(ibdev,
224 "Incompatible ABI params, udata not cleared\n");
225 return -EINVAL;
226 }
227
228 dev_attr = &dev->dev_attr;
229
230 memset(props, 0, sizeof(*props));
231 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
232 props->page_size_cap = dev_attr->page_size_cap;
233 props->vendor_id = dev->pdev->vendor;
234 props->vendor_part_id = dev->pdev->device;
235 props->hw_ver = dev->pdev->subsystem_device;
236 props->max_qp = dev_attr->max_qp;
237 props->max_cq = dev_attr->max_cq;
238 props->max_pd = dev_attr->max_pd;
239 props->max_mr = dev_attr->max_mr;
240 props->max_ah = dev_attr->max_ah;
241 props->max_cqe = dev_attr->max_cq_depth;
242 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
243 dev_attr->max_rq_depth);
244 props->max_send_sge = dev_attr->max_sq_sge;
245 props->max_recv_sge = dev_attr->max_rq_sge;
246 props->max_sge_rd = dev_attr->max_wr_rdma_sge;
247 props->max_pkeys = 1;
248
249 if (udata && udata->outlen) {
250 resp.max_sq_sge = dev_attr->max_sq_sge;
251 resp.max_rq_sge = dev_attr->max_rq_sge;
252 resp.max_sq_wr = dev_attr->max_sq_depth;
253 resp.max_rq_wr = dev_attr->max_rq_depth;
254 resp.max_rdma_size = dev_attr->max_rdma_size;
255
256 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID;
257 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_EXT_MEM;
258 if (EFA_DEV_CAP(dev, RDMA_READ))
259 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
260
261 if (EFA_DEV_CAP(dev, RNR_RETRY))
262 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
263
264 if (EFA_DEV_CAP(dev, DATA_POLLING_128))
265 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128;
266
267 if (EFA_DEV_CAP(dev, RDMA_WRITE))
268 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_WRITE;
269
270 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))
271 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_UNSOLICITED_WRITE_RECV;
272
273 if (dev->neqs)
274 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS;
275
276 err = ib_copy_to_udata(udata, &resp,
277 min(sizeof(resp), udata->outlen));
278 if (err) {
279 ibdev_dbg(ibdev,
280 "Failed to copy udata for query_device\n");
281 return err;
282 }
283 }
284
285 return 0;
286 }
287
efa_link_gbps_to_speed_and_width(u16 gbps,enum ib_port_speed * speed,enum ib_port_width * width)288 static void efa_link_gbps_to_speed_and_width(u16 gbps,
289 enum ib_port_speed *speed,
290 enum ib_port_width *width)
291 {
292 if (gbps >= 400) {
293 *width = IB_WIDTH_8X;
294 *speed = IB_SPEED_HDR;
295 } else if (gbps >= 200) {
296 *width = IB_WIDTH_4X;
297 *speed = IB_SPEED_HDR;
298 } else if (gbps >= 120) {
299 *width = IB_WIDTH_12X;
300 *speed = IB_SPEED_FDR10;
301 } else if (gbps >= 100) {
302 *width = IB_WIDTH_4X;
303 *speed = IB_SPEED_EDR;
304 } else if (gbps >= 60) {
305 *width = IB_WIDTH_12X;
306 *speed = IB_SPEED_DDR;
307 } else if (gbps >= 50) {
308 *width = IB_WIDTH_1X;
309 *speed = IB_SPEED_HDR;
310 } else if (gbps >= 40) {
311 *width = IB_WIDTH_4X;
312 *speed = IB_SPEED_FDR10;
313 } else if (gbps >= 30) {
314 *width = IB_WIDTH_12X;
315 *speed = IB_SPEED_SDR;
316 } else {
317 *width = IB_WIDTH_1X;
318 *speed = IB_SPEED_EDR;
319 }
320 }
321
efa_query_port(struct ib_device * ibdev,u32 port,struct ib_port_attr * props)322 int efa_query_port(struct ib_device *ibdev, u32 port,
323 struct ib_port_attr *props)
324 {
325 struct efa_dev *dev = to_edev(ibdev);
326 enum ib_port_speed link_speed;
327 enum ib_port_width link_width;
328 u16 link_gbps;
329
330 props->lmc = 1;
331
332 props->state = IB_PORT_ACTIVE;
333 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
334 props->gid_tbl_len = 1;
335 props->pkey_tbl_len = 1;
336 link_gbps = dev->dev_attr.max_link_speed_gbps ?: EFA_DEFAULT_LINK_SPEED_GBPS;
337 efa_link_gbps_to_speed_and_width(link_gbps, &link_speed, &link_width);
338 props->active_speed = link_speed;
339 props->active_width = link_width;
340 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
341 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
342 props->max_msg_sz = dev->dev_attr.mtu;
343 props->max_vl_num = 1;
344
345 return 0;
346 }
347
efa_query_qp(struct ib_qp * ibqp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)348 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
349 int qp_attr_mask,
350 struct ib_qp_init_attr *qp_init_attr)
351 {
352 struct efa_dev *dev = to_edev(ibqp->device);
353 struct efa_com_query_qp_params params = {};
354 struct efa_com_query_qp_result result;
355 struct efa_qp *qp = to_eqp(ibqp);
356 int err;
357
358 #define EFA_QUERY_QP_SUPP_MASK \
359 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
360 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
361
362 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
363 ibdev_dbg(&dev->ibdev,
364 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
365 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
366 return -EOPNOTSUPP;
367 }
368
369 memset(qp_attr, 0, sizeof(*qp_attr));
370 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
371
372 params.qp_handle = qp->qp_handle;
373 err = efa_com_query_qp(&dev->edev, ¶ms, &result);
374 if (err)
375 return err;
376
377 qp_attr->qp_state = result.qp_state;
378 qp_attr->qkey = result.qkey;
379 qp_attr->sq_psn = result.sq_psn;
380 qp_attr->sq_draining = result.sq_draining;
381 qp_attr->port_num = 1;
382 qp_attr->rnr_retry = result.rnr_retry;
383
384 qp_attr->cap.max_send_wr = qp->max_send_wr;
385 qp_attr->cap.max_recv_wr = qp->max_recv_wr;
386 qp_attr->cap.max_send_sge = qp->max_send_sge;
387 qp_attr->cap.max_recv_sge = qp->max_recv_sge;
388 qp_attr->cap.max_inline_data = qp->max_inline_data;
389
390 qp_init_attr->qp_type = ibqp->qp_type;
391 qp_init_attr->recv_cq = ibqp->recv_cq;
392 qp_init_attr->send_cq = ibqp->send_cq;
393 qp_init_attr->qp_context = ibqp->qp_context;
394 qp_init_attr->cap = qp_attr->cap;
395
396 return 0;
397 }
398
efa_query_gid(struct ib_device * ibdev,u32 port,int index,union ib_gid * gid)399 int efa_query_gid(struct ib_device *ibdev, u32 port, int index,
400 union ib_gid *gid)
401 {
402 struct efa_dev *dev = to_edev(ibdev);
403
404 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
405
406 return 0;
407 }
408
efa_query_pkey(struct ib_device * ibdev,u32 port,u16 index,u16 * pkey)409 int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
410 u16 *pkey)
411 {
412 if (index > 0)
413 return -EINVAL;
414
415 *pkey = 0xffff;
416 return 0;
417 }
418
efa_pd_dealloc(struct efa_dev * dev,u16 pdn)419 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
420 {
421 struct efa_com_dealloc_pd_params params = {
422 .pdn = pdn,
423 };
424
425 return efa_com_dealloc_pd(&dev->edev, ¶ms);
426 }
427
efa_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)428 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
429 {
430 struct efa_dev *dev = to_edev(ibpd->device);
431 struct efa_ibv_alloc_pd_resp resp = {};
432 struct efa_com_alloc_pd_result result;
433 struct efa_pd *pd = to_epd(ibpd);
434 int err;
435
436 if (udata->inlen &&
437 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
438 ibdev_dbg(&dev->ibdev,
439 "Incompatible ABI params, udata not cleared\n");
440 err = -EINVAL;
441 goto err_out;
442 }
443
444 err = efa_com_alloc_pd(&dev->edev, &result);
445 if (err)
446 goto err_out;
447
448 pd->pdn = result.pdn;
449 resp.pdn = result.pdn;
450
451 if (udata->outlen) {
452 err = ib_copy_to_udata(udata, &resp,
453 min(sizeof(resp), udata->outlen));
454 if (err) {
455 ibdev_dbg(&dev->ibdev,
456 "Failed to copy udata for alloc_pd\n");
457 goto err_dealloc_pd;
458 }
459 }
460
461 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
462
463 return 0;
464
465 err_dealloc_pd:
466 efa_pd_dealloc(dev, result.pdn);
467 err_out:
468 atomic64_inc(&dev->stats.alloc_pd_err);
469 return err;
470 }
471
efa_dealloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)472 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
473 {
474 struct efa_dev *dev = to_edev(ibpd->device);
475 struct efa_pd *pd = to_epd(ibpd);
476
477 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
478 efa_pd_dealloc(dev, pd->pdn);
479 return 0;
480 }
481
efa_destroy_qp_handle(struct efa_dev * dev,u32 qp_handle)482 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
483 {
484 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
485
486 return efa_com_destroy_qp(&dev->edev, ¶ms);
487 }
488
efa_qp_user_mmap_entries_remove(struct efa_qp * qp)489 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
490 {
491 rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
492 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
493 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
494 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
495 }
496
efa_destroy_qp(struct ib_qp * ibqp,struct ib_udata * udata)497 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
498 {
499 struct efa_dev *dev = to_edev(ibqp->pd->device);
500 struct efa_qp *qp = to_eqp(ibqp);
501 int err;
502
503 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
504
505 err = efa_destroy_qp_handle(dev, qp->qp_handle);
506 if (err)
507 return err;
508
509 efa_qp_user_mmap_entries_remove(qp);
510
511 if (qp->rq_cpu_addr) {
512 ibdev_dbg(&dev->ibdev,
513 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
514 qp->rq_cpu_addr, qp->rq_size,
515 &qp->rq_dma_addr);
516 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
517 qp->rq_size, DMA_TO_DEVICE);
518 }
519
520 return 0;
521 }
522
523 static struct rdma_user_mmap_entry*
efa_user_mmap_entry_insert(struct ib_ucontext * ucontext,u64 address,size_t length,u8 mmap_flag,u64 * offset)524 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
525 u64 address, size_t length,
526 u8 mmap_flag, u64 *offset)
527 {
528 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
529 int err;
530
531 if (!entry)
532 return NULL;
533
534 entry->address = address;
535 entry->mmap_flag = mmap_flag;
536
537 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
538 length);
539 if (err) {
540 kfree(entry);
541 return NULL;
542 }
543 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
544
545 return &entry->rdma_entry;
546 }
547
qp_mmap_entries_setup(struct efa_qp * qp,struct efa_dev * dev,struct efa_ucontext * ucontext,struct efa_com_create_qp_params * params,struct efa_ibv_create_qp_resp * resp)548 static int qp_mmap_entries_setup(struct efa_qp *qp,
549 struct efa_dev *dev,
550 struct efa_ucontext *ucontext,
551 struct efa_com_create_qp_params *params,
552 struct efa_ibv_create_qp_resp *resp)
553 {
554 size_t length;
555 u64 address;
556
557 address = dev->db_bar_addr + resp->sq_db_offset;
558 qp->sq_db_mmap_entry =
559 efa_user_mmap_entry_insert(&ucontext->ibucontext,
560 address,
561 PAGE_SIZE, EFA_MMAP_IO_NC,
562 &resp->sq_db_mmap_key);
563 if (!qp->sq_db_mmap_entry)
564 return -ENOMEM;
565
566 resp->sq_db_offset &= ~PAGE_MASK;
567
568 address = dev->mem_bar_addr + resp->llq_desc_offset;
569 length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
570 offset_in_page(resp->llq_desc_offset));
571
572 qp->llq_desc_mmap_entry =
573 efa_user_mmap_entry_insert(&ucontext->ibucontext,
574 address, length,
575 EFA_MMAP_IO_WC,
576 &resp->llq_desc_mmap_key);
577 if (!qp->llq_desc_mmap_entry)
578 goto err_remove_mmap;
579
580 resp->llq_desc_offset &= ~PAGE_MASK;
581
582 if (qp->rq_size) {
583 address = dev->db_bar_addr + resp->rq_db_offset;
584
585 qp->rq_db_mmap_entry =
586 efa_user_mmap_entry_insert(&ucontext->ibucontext,
587 address, PAGE_SIZE,
588 EFA_MMAP_IO_NC,
589 &resp->rq_db_mmap_key);
590 if (!qp->rq_db_mmap_entry)
591 goto err_remove_mmap;
592
593 resp->rq_db_offset &= ~PAGE_MASK;
594
595 address = virt_to_phys(qp->rq_cpu_addr);
596 qp->rq_mmap_entry =
597 efa_user_mmap_entry_insert(&ucontext->ibucontext,
598 address, qp->rq_size,
599 EFA_MMAP_DMA_PAGE,
600 &resp->rq_mmap_key);
601 if (!qp->rq_mmap_entry)
602 goto err_remove_mmap;
603
604 resp->rq_mmap_size = qp->rq_size;
605 }
606
607 return 0;
608
609 err_remove_mmap:
610 efa_qp_user_mmap_entries_remove(qp);
611
612 return -ENOMEM;
613 }
614
efa_qp_validate_cap(struct efa_dev * dev,struct ib_qp_init_attr * init_attr)615 static int efa_qp_validate_cap(struct efa_dev *dev,
616 struct ib_qp_init_attr *init_attr)
617 {
618 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
619 ibdev_dbg(&dev->ibdev,
620 "qp: requested send wr[%u] exceeds the max[%u]\n",
621 init_attr->cap.max_send_wr,
622 dev->dev_attr.max_sq_depth);
623 return -EINVAL;
624 }
625 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
626 ibdev_dbg(&dev->ibdev,
627 "qp: requested receive wr[%u] exceeds the max[%u]\n",
628 init_attr->cap.max_recv_wr,
629 dev->dev_attr.max_rq_depth);
630 return -EINVAL;
631 }
632 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
633 ibdev_dbg(&dev->ibdev,
634 "qp: requested sge send[%u] exceeds the max[%u]\n",
635 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
636 return -EINVAL;
637 }
638 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
639 ibdev_dbg(&dev->ibdev,
640 "qp: requested sge recv[%u] exceeds the max[%u]\n",
641 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
642 return -EINVAL;
643 }
644 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
645 ibdev_dbg(&dev->ibdev,
646 "qp: requested inline data[%u] exceeds the max[%u]\n",
647 init_attr->cap.max_inline_data,
648 dev->dev_attr.inline_buf_size);
649 return -EINVAL;
650 }
651
652 return 0;
653 }
654
efa_qp_validate_attr(struct efa_dev * dev,struct ib_qp_init_attr * init_attr)655 static int efa_qp_validate_attr(struct efa_dev *dev,
656 struct ib_qp_init_attr *init_attr)
657 {
658 if (init_attr->qp_type != IB_QPT_DRIVER &&
659 init_attr->qp_type != IB_QPT_UD) {
660 ibdev_dbg(&dev->ibdev,
661 "Unsupported qp type %d\n", init_attr->qp_type);
662 return -EOPNOTSUPP;
663 }
664
665 if (init_attr->srq) {
666 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
667 return -EOPNOTSUPP;
668 }
669
670 if (init_attr->create_flags) {
671 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
672 return -EOPNOTSUPP;
673 }
674
675 return 0;
676 }
677
efa_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)678 int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
679 struct ib_udata *udata)
680 {
681 struct efa_com_create_qp_params create_qp_params = {};
682 struct efa_com_create_qp_result create_qp_resp;
683 struct efa_dev *dev = to_edev(ibqp->device);
684 struct efa_ibv_create_qp_resp resp = {};
685 struct efa_ibv_create_qp cmd = {};
686 struct efa_qp *qp = to_eqp(ibqp);
687 struct efa_ucontext *ucontext;
688 u16 supported_efa_flags = 0;
689 int err;
690
691 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
692 ibucontext);
693
694 err = efa_qp_validate_cap(dev, init_attr);
695 if (err)
696 goto err_out;
697
698 err = efa_qp_validate_attr(dev, init_attr);
699 if (err)
700 goto err_out;
701
702 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
703 ibdev_dbg(&dev->ibdev,
704 "Incompatible ABI params, no input udata\n");
705 err = -EINVAL;
706 goto err_out;
707 }
708
709 if (udata->inlen > sizeof(cmd) &&
710 !ib_is_udata_cleared(udata, sizeof(cmd),
711 udata->inlen - sizeof(cmd))) {
712 ibdev_dbg(&dev->ibdev,
713 "Incompatible ABI params, unknown fields in udata\n");
714 err = -EINVAL;
715 goto err_out;
716 }
717
718 err = ib_copy_from_udata(&cmd, udata,
719 min(sizeof(cmd), udata->inlen));
720 if (err) {
721 ibdev_dbg(&dev->ibdev,
722 "Cannot copy udata for create_qp\n");
723 goto err_out;
724 }
725
726 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_98)) {
727 ibdev_dbg(&dev->ibdev,
728 "Incompatible ABI params, unknown fields in udata\n");
729 err = -EINVAL;
730 goto err_out;
731 }
732
733 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))
734 supported_efa_flags |= EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV;
735
736 if (cmd.flags & ~supported_efa_flags) {
737 ibdev_dbg(&dev->ibdev, "Unsupported EFA QP create flags[%#x], supported[%#x]\n",
738 cmd.flags, supported_efa_flags);
739 err = -EOPNOTSUPP;
740 goto err_out;
741 }
742
743 create_qp_params.uarn = ucontext->uarn;
744 create_qp_params.pd = to_epd(ibqp->pd)->pdn;
745
746 if (init_attr->qp_type == IB_QPT_UD) {
747 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
748 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
749 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
750 } else {
751 ibdev_dbg(&dev->ibdev,
752 "Unsupported qp type %d driver qp type %d\n",
753 init_attr->qp_type, cmd.driver_qp_type);
754 err = -EOPNOTSUPP;
755 goto err_out;
756 }
757
758 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
759 init_attr->qp_type, cmd.driver_qp_type);
760 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
761 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
762 create_qp_params.sq_depth = init_attr->cap.max_send_wr;
763 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
764
765 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
766 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
767 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
768 if (qp->rq_size) {
769 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
770 qp->rq_size, DMA_TO_DEVICE);
771 if (!qp->rq_cpu_addr) {
772 err = -ENOMEM;
773 goto err_out;
774 }
775
776 ibdev_dbg(&dev->ibdev,
777 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
778 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
779 create_qp_params.rq_base_addr = qp->rq_dma_addr;
780 }
781
782 create_qp_params.sl = cmd.sl;
783
784 if (cmd.flags & EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV)
785 create_qp_params.unsolicited_write_recv = true;
786
787 err = efa_com_create_qp(&dev->edev, &create_qp_params,
788 &create_qp_resp);
789 if (err)
790 goto err_free_mapped;
791
792 resp.sq_db_offset = create_qp_resp.sq_db_offset;
793 resp.rq_db_offset = create_qp_resp.rq_db_offset;
794 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
795 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
796 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
797
798 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
799 &resp);
800 if (err)
801 goto err_destroy_qp;
802
803 qp->qp_handle = create_qp_resp.qp_handle;
804 qp->ibqp.qp_num = create_qp_resp.qp_num;
805 qp->max_send_wr = init_attr->cap.max_send_wr;
806 qp->max_recv_wr = init_attr->cap.max_recv_wr;
807 qp->max_send_sge = init_attr->cap.max_send_sge;
808 qp->max_recv_sge = init_attr->cap.max_recv_sge;
809 qp->max_inline_data = init_attr->cap.max_inline_data;
810
811 if (udata->outlen) {
812 err = ib_copy_to_udata(udata, &resp,
813 min(sizeof(resp), udata->outlen));
814 if (err) {
815 ibdev_dbg(&dev->ibdev,
816 "Failed to copy udata for qp[%u]\n",
817 create_qp_resp.qp_num);
818 goto err_remove_mmap_entries;
819 }
820 }
821
822 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
823
824 return 0;
825
826 err_remove_mmap_entries:
827 efa_qp_user_mmap_entries_remove(qp);
828 err_destroy_qp:
829 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
830 err_free_mapped:
831 if (qp->rq_size)
832 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
833 qp->rq_size, DMA_TO_DEVICE);
834 err_out:
835 atomic64_inc(&dev->stats.create_qp_err);
836 return err;
837 }
838
839 static const struct {
840 int valid;
841 enum ib_qp_attr_mask req_param;
842 enum ib_qp_attr_mask opt_param;
843 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
844 [IB_QPS_RESET] = {
845 [IB_QPS_RESET] = { .valid = 1 },
846 [IB_QPS_INIT] = {
847 .valid = 1,
848 .req_param = IB_QP_PKEY_INDEX |
849 IB_QP_PORT |
850 IB_QP_QKEY,
851 },
852 },
853 [IB_QPS_INIT] = {
854 [IB_QPS_RESET] = { .valid = 1 },
855 [IB_QPS_ERR] = { .valid = 1 },
856 [IB_QPS_INIT] = {
857 .valid = 1,
858 .opt_param = IB_QP_PKEY_INDEX |
859 IB_QP_PORT |
860 IB_QP_QKEY,
861 },
862 [IB_QPS_RTR] = {
863 .valid = 1,
864 .opt_param = IB_QP_PKEY_INDEX |
865 IB_QP_QKEY,
866 },
867 },
868 [IB_QPS_RTR] = {
869 [IB_QPS_RESET] = { .valid = 1 },
870 [IB_QPS_ERR] = { .valid = 1 },
871 [IB_QPS_RTS] = {
872 .valid = 1,
873 .req_param = IB_QP_SQ_PSN,
874 .opt_param = IB_QP_CUR_STATE |
875 IB_QP_QKEY |
876 IB_QP_RNR_RETRY,
877
878 }
879 },
880 [IB_QPS_RTS] = {
881 [IB_QPS_RESET] = { .valid = 1 },
882 [IB_QPS_ERR] = { .valid = 1 },
883 [IB_QPS_RTS] = {
884 .valid = 1,
885 .opt_param = IB_QP_CUR_STATE |
886 IB_QP_QKEY,
887 },
888 [IB_QPS_SQD] = {
889 .valid = 1,
890 .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,
891 },
892 },
893 [IB_QPS_SQD] = {
894 [IB_QPS_RESET] = { .valid = 1 },
895 [IB_QPS_ERR] = { .valid = 1 },
896 [IB_QPS_RTS] = {
897 .valid = 1,
898 .opt_param = IB_QP_CUR_STATE |
899 IB_QP_QKEY,
900 },
901 [IB_QPS_SQD] = {
902 .valid = 1,
903 .opt_param = IB_QP_PKEY_INDEX |
904 IB_QP_QKEY,
905 }
906 },
907 [IB_QPS_SQE] = {
908 [IB_QPS_RESET] = { .valid = 1 },
909 [IB_QPS_ERR] = { .valid = 1 },
910 [IB_QPS_RTS] = {
911 .valid = 1,
912 .opt_param = IB_QP_CUR_STATE |
913 IB_QP_QKEY,
914 }
915 },
916 [IB_QPS_ERR] = {
917 [IB_QPS_RESET] = { .valid = 1 },
918 [IB_QPS_ERR] = { .valid = 1 },
919 }
920 };
921
efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,enum ib_qp_state next_state,enum ib_qp_attr_mask mask)922 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,
923 enum ib_qp_state next_state,
924 enum ib_qp_attr_mask mask)
925 {
926 enum ib_qp_attr_mask req_param, opt_param;
927
928 if (mask & IB_QP_CUR_STATE &&
929 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
930 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
931 return false;
932
933 if (!srd_qp_state_table[cur_state][next_state].valid)
934 return false;
935
936 req_param = srd_qp_state_table[cur_state][next_state].req_param;
937 opt_param = srd_qp_state_table[cur_state][next_state].opt_param;
938
939 if ((mask & req_param) != req_param)
940 return false;
941
942 if (mask & ~(req_param | opt_param | IB_QP_STATE))
943 return false;
944
945 return true;
946 }
947
efa_modify_qp_validate(struct efa_dev * dev,struct efa_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,enum ib_qp_state cur_state,enum ib_qp_state new_state)948 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
949 struct ib_qp_attr *qp_attr, int qp_attr_mask,
950 enum ib_qp_state cur_state,
951 enum ib_qp_state new_state)
952 {
953 int err;
954
955 #define EFA_MODIFY_QP_SUPP_MASK \
956 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
957 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
958 IB_QP_RNR_RETRY)
959
960 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
961 ibdev_dbg(&dev->ibdev,
962 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
963 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
964 return -EOPNOTSUPP;
965 }
966
967 if (qp->ibqp.qp_type == IB_QPT_DRIVER)
968 err = !efa_modify_srd_qp_is_ok(cur_state, new_state,
969 qp_attr_mask);
970 else
971 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
972 qp_attr_mask);
973
974 if (err) {
975 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
976 return -EINVAL;
977 }
978
979 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
980 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
981 return -EOPNOTSUPP;
982 }
983
984 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
985 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
986 return -EOPNOTSUPP;
987 }
988
989 return 0;
990 }
991
efa_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_udata * udata)992 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
993 int qp_attr_mask, struct ib_udata *udata)
994 {
995 struct efa_dev *dev = to_edev(ibqp->device);
996 struct efa_com_modify_qp_params params = {};
997 struct efa_qp *qp = to_eqp(ibqp);
998 enum ib_qp_state cur_state;
999 enum ib_qp_state new_state;
1000 int err;
1001
1002 if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1003 return -EOPNOTSUPP;
1004
1005 if (udata->inlen &&
1006 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1007 ibdev_dbg(&dev->ibdev,
1008 "Incompatible ABI params, udata not cleared\n");
1009 return -EINVAL;
1010 }
1011
1012 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
1013 qp->state;
1014 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
1015
1016 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
1017 new_state);
1018 if (err)
1019 return err;
1020
1021 params.qp_handle = qp->qp_handle;
1022
1023 if (qp_attr_mask & IB_QP_STATE) {
1024 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,
1025 1);
1026 EFA_SET(¶ms.modify_mask,
1027 EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);
1028 params.cur_qp_state = cur_state;
1029 params.qp_state = new_state;
1030 }
1031
1032 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
1033 EFA_SET(¶ms.modify_mask,
1034 EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);
1035 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
1036 }
1037
1038 if (qp_attr_mask & IB_QP_QKEY) {
1039 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);
1040 params.qkey = qp_attr->qkey;
1041 }
1042
1043 if (qp_attr_mask & IB_QP_SQ_PSN) {
1044 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);
1045 params.sq_psn = qp_attr->sq_psn;
1046 }
1047
1048 if (qp_attr_mask & IB_QP_RNR_RETRY) {
1049 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
1050 1);
1051 params.rnr_retry = qp_attr->rnr_retry;
1052 }
1053
1054 err = efa_com_modify_qp(&dev->edev, ¶ms);
1055 if (err)
1056 return err;
1057
1058 qp->state = new_state;
1059
1060 return 0;
1061 }
1062
efa_destroy_cq_idx(struct efa_dev * dev,int cq_idx)1063 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
1064 {
1065 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
1066
1067 return efa_com_destroy_cq(&dev->edev, ¶ms);
1068 }
1069
efa_cq_user_mmap_entries_remove(struct efa_cq * cq)1070 static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq)
1071 {
1072 rdma_user_mmap_entry_remove(cq->db_mmap_entry);
1073 rdma_user_mmap_entry_remove(cq->mmap_entry);
1074 }
1075
efa_destroy_cq(struct ib_cq * ibcq,struct ib_udata * udata)1076 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
1077 {
1078 struct efa_dev *dev = to_edev(ibcq->device);
1079 struct efa_cq *cq = to_ecq(ibcq);
1080
1081 ibdev_dbg(&dev->ibdev,
1082 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
1083 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
1084
1085 efa_destroy_cq_idx(dev, cq->cq_idx);
1086 efa_cq_user_mmap_entries_remove(cq);
1087 if (cq->eq) {
1088 xa_erase(&dev->cqs_xa, cq->cq_idx);
1089 synchronize_irq(cq->eq->irq.irqn);
1090 }
1091
1092 if (cq->umem)
1093 ib_umem_release(cq->umem);
1094 else
1095 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, DMA_FROM_DEVICE);
1096 return 0;
1097 }
1098
efa_vec2eq(struct efa_dev * dev,int vec)1099 static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec)
1100 {
1101 return &dev->eqs[vec];
1102 }
1103
cq_mmap_entries_setup(struct efa_dev * dev,struct efa_cq * cq,struct efa_ibv_create_cq_resp * resp,bool db_valid)1104 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
1105 struct efa_ibv_create_cq_resp *resp,
1106 bool db_valid)
1107 {
1108 resp->q_mmap_size = cq->size;
1109 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1110 virt_to_phys(cq->cpu_addr),
1111 cq->size, EFA_MMAP_DMA_PAGE,
1112 &resp->q_mmap_key);
1113 if (!cq->mmap_entry)
1114 return -ENOMEM;
1115
1116 if (db_valid) {
1117 cq->db_mmap_entry =
1118 efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1119 dev->db_bar_addr + resp->db_off,
1120 PAGE_SIZE, EFA_MMAP_IO_NC,
1121 &resp->db_mmap_key);
1122 if (!cq->db_mmap_entry) {
1123 rdma_user_mmap_entry_remove(cq->mmap_entry);
1124 return -ENOMEM;
1125 }
1126
1127 resp->db_off &= ~PAGE_MASK;
1128 resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF;
1129 }
1130
1131 return 0;
1132 }
1133
efa_create_cq_umem(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_umem * umem,struct uverbs_attr_bundle * attrs)1134 int efa_create_cq_umem(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1135 struct ib_umem *umem, struct uverbs_attr_bundle *attrs)
1136 {
1137 struct ib_udata *udata = &attrs->driver_udata;
1138 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
1139 udata, struct efa_ucontext, ibucontext);
1140 struct efa_com_create_cq_params params = {};
1141 struct efa_ibv_create_cq_resp resp = {};
1142 struct efa_com_create_cq_result result;
1143 struct ib_device *ibdev = ibcq->device;
1144 struct efa_dev *dev = to_edev(ibdev);
1145 struct efa_ibv_create_cq cmd = {};
1146 struct efa_cq *cq = to_ecq(ibcq);
1147 int entries = attr->cqe;
1148 bool set_src_addr;
1149 int err;
1150
1151 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
1152
1153 if (attr->flags)
1154 return -EOPNOTSUPP;
1155
1156 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
1157 ibdev_dbg(ibdev,
1158 "cq: requested entries[%u] non-positive or greater than max[%u]\n",
1159 entries, dev->dev_attr.max_cq_depth);
1160 err = -EINVAL;
1161 goto err_out;
1162 }
1163
1164 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
1165 ibdev_dbg(ibdev,
1166 "Incompatible ABI params, no input udata\n");
1167 err = -EINVAL;
1168 goto err_out;
1169 }
1170
1171 if (udata->inlen > sizeof(cmd) &&
1172 !ib_is_udata_cleared(udata, sizeof(cmd),
1173 udata->inlen - sizeof(cmd))) {
1174 ibdev_dbg(ibdev,
1175 "Incompatible ABI params, unknown fields in udata\n");
1176 err = -EINVAL;
1177 goto err_out;
1178 }
1179
1180 err = ib_copy_from_udata(&cmd, udata,
1181 min(sizeof(cmd), udata->inlen));
1182 if (err) {
1183 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
1184 goto err_out;
1185 }
1186
1187 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {
1188 ibdev_dbg(ibdev,
1189 "Incompatible ABI params, unknown fields in udata\n");
1190 err = -EINVAL;
1191 goto err_out;
1192 }
1193
1194 set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID);
1195 if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) &&
1196 (set_src_addr ||
1197 cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) {
1198 ibdev_dbg(ibdev,
1199 "Invalid entry size [%u]\n", cmd.cq_entry_size);
1200 err = -EINVAL;
1201 goto err_out;
1202 }
1203
1204 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
1205 ibdev_dbg(ibdev,
1206 "Invalid number of sub cqs[%u] expected[%u]\n",
1207 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
1208 err = -EINVAL;
1209 goto err_out;
1210 }
1211
1212 cq->ucontext = ucontext;
1213 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
1214
1215 if (umem) {
1216 if (umem->length < cq->size) {
1217 ibdev_dbg(&dev->ibdev, "External memory too small\n");
1218 err = -EINVAL;
1219 goto err_out;
1220 }
1221
1222 if (!ib_umem_is_contiguous(umem)) {
1223 ibdev_dbg(&dev->ibdev, "Non contiguous CQ unsupported\n");
1224 err = -EINVAL;
1225 goto err_out;
1226 }
1227
1228 cq->cpu_addr = NULL;
1229 cq->dma_addr = ib_umem_start_dma_addr(umem);
1230 cq->umem = umem;
1231 } else {
1232 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
1233 DMA_FROM_DEVICE);
1234 if (!cq->cpu_addr) {
1235 err = -ENOMEM;
1236 goto err_out;
1237 }
1238 }
1239
1240 params.uarn = cq->ucontext->uarn;
1241 params.sub_cq_depth = entries;
1242 params.dma_addr = cq->dma_addr;
1243 params.entry_size_in_bytes = cmd.cq_entry_size;
1244 params.num_sub_cqs = cmd.num_sub_cqs;
1245 params.set_src_addr = set_src_addr;
1246 if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) {
1247 cq->eq = efa_vec2eq(dev, attr->comp_vector);
1248 params.eqn = cq->eq->eeq.eqn;
1249 params.interrupt_mode_enabled = true;
1250 }
1251
1252 err = efa_com_create_cq(&dev->edev, ¶ms, &result);
1253 if (err)
1254 goto err_free_mapped;
1255
1256 resp.db_off = result.db_off;
1257 resp.cq_idx = result.cq_idx;
1258 cq->cq_idx = result.cq_idx;
1259 cq->ibcq.cqe = result.actual_depth;
1260 WARN_ON_ONCE(entries != result.actual_depth);
1261
1262 if (!umem)
1263 err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid);
1264
1265 if (err) {
1266 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
1267 cq->cq_idx);
1268 goto err_destroy_cq;
1269 }
1270
1271 if (cq->eq) {
1272 err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL));
1273 if (err) {
1274 ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n",
1275 cq->cq_idx);
1276 goto err_remove_mmap;
1277 }
1278 }
1279
1280 if (udata->outlen) {
1281 err = ib_copy_to_udata(udata, &resp,
1282 min(sizeof(resp), udata->outlen));
1283 if (err) {
1284 ibdev_dbg(ibdev,
1285 "Failed to copy udata for create_cq\n");
1286 goto err_xa_erase;
1287 }
1288 }
1289
1290 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1291 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1292
1293 return 0;
1294
1295 err_xa_erase:
1296 if (cq->eq)
1297 xa_erase(&dev->cqs_xa, cq->cq_idx);
1298 err_remove_mmap:
1299 efa_cq_user_mmap_entries_remove(cq);
1300 err_destroy_cq:
1301 efa_destroy_cq_idx(dev, cq->cq_idx);
1302 err_free_mapped:
1303 if (!umem)
1304 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1305 DMA_FROM_DEVICE);
1306 err_out:
1307 atomic64_inc(&dev->stats.create_cq_err);
1308 return err;
1309 }
1310
efa_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct uverbs_attr_bundle * attrs)1311 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1312 struct uverbs_attr_bundle *attrs)
1313 {
1314 return efa_create_cq_umem(ibcq, attr, NULL, attrs);
1315 }
1316
umem_to_page_list(struct efa_dev * dev,struct ib_umem * umem,u64 * page_list,u32 hp_cnt,u8 hp_shift)1317 static int umem_to_page_list(struct efa_dev *dev,
1318 struct ib_umem *umem,
1319 u64 *page_list,
1320 u32 hp_cnt,
1321 u8 hp_shift)
1322 {
1323 struct ib_block_iter biter;
1324 unsigned int hp_idx = 0;
1325
1326 rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
1327 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1328
1329 return 0;
1330 }
1331
efa_vmalloc_buf_to_sg(u64 * buf,int page_cnt)1332 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1333 {
1334 struct scatterlist *sglist;
1335 struct page *pg;
1336 int i;
1337
1338 sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);
1339 if (!sglist)
1340 return NULL;
1341 sg_init_table(sglist, page_cnt);
1342 for (i = 0; i < page_cnt; i++) {
1343 pg = vmalloc_to_page(buf);
1344 if (!pg)
1345 goto err;
1346 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1347 buf += PAGE_SIZE / sizeof(*buf);
1348 }
1349 return sglist;
1350
1351 err:
1352 kfree(sglist);
1353 return NULL;
1354 }
1355
1356 /*
1357 * create a chunk list of physical pages dma addresses from the supplied
1358 * scatter gather list
1359 */
pbl_chunk_list_create(struct efa_dev * dev,struct pbl_context * pbl)1360 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1361 {
1362 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1363 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1364 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1365 unsigned int chunk_list_size, chunk_idx, payload_idx;
1366 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1367 struct efa_com_ctrl_buff_info *ctrl_buf;
1368 u64 *cur_chunk_buf, *prev_chunk_buf;
1369 struct ib_block_iter biter;
1370 dma_addr_t dma_addr;
1371 int i;
1372
1373 /* allocate a chunk list that consists of 4KB chunks */
1374 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1375
1376 chunk_list->size = chunk_list_size;
1377 chunk_list->chunks = kcalloc(chunk_list_size,
1378 sizeof(*chunk_list->chunks),
1379 GFP_KERNEL);
1380 if (!chunk_list->chunks)
1381 return -ENOMEM;
1382
1383 ibdev_dbg(&dev->ibdev,
1384 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1385 page_cnt);
1386
1387 /* allocate chunk buffers: */
1388 for (i = 0; i < chunk_list_size; i++) {
1389 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1390 if (!chunk_list->chunks[i].buf)
1391 goto chunk_list_dealloc;
1392
1393 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1394 }
1395 chunk_list->chunks[chunk_list_size - 1].length =
1396 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1397 EFA_CHUNK_PTR_SIZE;
1398
1399 /* fill the dma addresses of sg list pages to chunks: */
1400 chunk_idx = 0;
1401 payload_idx = 0;
1402 cur_chunk_buf = chunk_list->chunks[0].buf;
1403 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1404 EFA_CHUNK_PAYLOAD_SIZE) {
1405 cur_chunk_buf[payload_idx++] =
1406 rdma_block_iter_dma_address(&biter);
1407
1408 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1409 chunk_idx++;
1410 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1411 payload_idx = 0;
1412 }
1413 }
1414
1415 /* map chunks to dma and fill chunks next ptrs */
1416 for (i = chunk_list_size - 1; i >= 0; i--) {
1417 dma_addr = dma_map_single(&dev->pdev->dev,
1418 chunk_list->chunks[i].buf,
1419 chunk_list->chunks[i].length,
1420 DMA_TO_DEVICE);
1421 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1422 ibdev_err(&dev->ibdev,
1423 "chunk[%u] dma_map_failed\n", i);
1424 goto chunk_list_unmap;
1425 }
1426
1427 chunk_list->chunks[i].dma_addr = dma_addr;
1428 ibdev_dbg(&dev->ibdev,
1429 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1430
1431 if (!i)
1432 break;
1433
1434 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1435
1436 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1437 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1438 ctrl_buf->length = chunk_list->chunks[i].length;
1439
1440 efa_com_set_dma_addr(dma_addr,
1441 &ctrl_buf->address.mem_addr_high,
1442 &ctrl_buf->address.mem_addr_low);
1443 }
1444
1445 return 0;
1446
1447 chunk_list_unmap:
1448 for (; i < chunk_list_size; i++) {
1449 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1450 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1451 }
1452 chunk_list_dealloc:
1453 for (i = 0; i < chunk_list_size; i++)
1454 kfree(chunk_list->chunks[i].buf);
1455
1456 kfree(chunk_list->chunks);
1457 return -ENOMEM;
1458 }
1459
pbl_chunk_list_destroy(struct efa_dev * dev,struct pbl_context * pbl)1460 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1461 {
1462 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1463 int i;
1464
1465 for (i = 0; i < chunk_list->size; i++) {
1466 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1467 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1468 kfree(chunk_list->chunks[i].buf);
1469 }
1470
1471 kfree(chunk_list->chunks);
1472 }
1473
1474 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
pbl_continuous_initialize(struct efa_dev * dev,struct pbl_context * pbl)1475 static int pbl_continuous_initialize(struct efa_dev *dev,
1476 struct pbl_context *pbl)
1477 {
1478 dma_addr_t dma_addr;
1479
1480 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1481 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1482 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1483 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1484 return -ENOMEM;
1485 }
1486
1487 pbl->phys.continuous.dma_addr = dma_addr;
1488 ibdev_dbg(&dev->ibdev,
1489 "pbl continuous - dma_addr = %pad, size[%u]\n",
1490 &dma_addr, pbl->pbl_buf_size_in_bytes);
1491
1492 return 0;
1493 }
1494
1495 /*
1496 * initialize pbl indirect mode:
1497 * create a chunk list out of the dma addresses of the physical pages of
1498 * pbl buffer.
1499 */
pbl_indirect_initialize(struct efa_dev * dev,struct pbl_context * pbl)1500 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1501 {
1502 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE);
1503 struct scatterlist *sgl;
1504 int sg_dma_cnt, err;
1505
1506 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1507 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1508 if (!sgl)
1509 return -ENOMEM;
1510
1511 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1512 if (!sg_dma_cnt) {
1513 err = -EINVAL;
1514 goto err_map;
1515 }
1516
1517 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1518 pbl->phys.indirect.sgl = sgl;
1519 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1520 err = pbl_chunk_list_create(dev, pbl);
1521 if (err) {
1522 ibdev_dbg(&dev->ibdev,
1523 "chunk_list creation failed[%d]\n", err);
1524 goto err_chunk;
1525 }
1526
1527 ibdev_dbg(&dev->ibdev,
1528 "pbl indirect - size[%u], chunks[%u]\n",
1529 pbl->pbl_buf_size_in_bytes,
1530 pbl->phys.indirect.chunk_list.size);
1531
1532 return 0;
1533
1534 err_chunk:
1535 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1536 err_map:
1537 kfree(sgl);
1538 return err;
1539 }
1540
pbl_indirect_terminate(struct efa_dev * dev,struct pbl_context * pbl)1541 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1542 {
1543 pbl_chunk_list_destroy(dev, pbl);
1544 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1545 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1546 kfree(pbl->phys.indirect.sgl);
1547 }
1548
1549 /* create a page buffer list from a mapped user memory region */
pbl_create(struct efa_dev * dev,struct pbl_context * pbl,struct ib_umem * umem,int hp_cnt,u8 hp_shift)1550 static int pbl_create(struct efa_dev *dev,
1551 struct pbl_context *pbl,
1552 struct ib_umem *umem,
1553 int hp_cnt,
1554 u8 hp_shift)
1555 {
1556 int err;
1557
1558 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1559 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1560 if (!pbl->pbl_buf)
1561 return -ENOMEM;
1562
1563 if (is_vmalloc_addr(pbl->pbl_buf)) {
1564 pbl->physically_continuous = 0;
1565 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1566 hp_shift);
1567 if (err)
1568 goto err_free;
1569
1570 err = pbl_indirect_initialize(dev, pbl);
1571 if (err)
1572 goto err_free;
1573 } else {
1574 pbl->physically_continuous = 1;
1575 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1576 hp_shift);
1577 if (err)
1578 goto err_free;
1579
1580 err = pbl_continuous_initialize(dev, pbl);
1581 if (err)
1582 goto err_free;
1583 }
1584
1585 ibdev_dbg(&dev->ibdev,
1586 "user_pbl_created: user_pages[%u], continuous[%u]\n",
1587 hp_cnt, pbl->physically_continuous);
1588
1589 return 0;
1590
1591 err_free:
1592 kvfree(pbl->pbl_buf);
1593 return err;
1594 }
1595
pbl_destroy(struct efa_dev * dev,struct pbl_context * pbl)1596 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1597 {
1598 if (pbl->physically_continuous)
1599 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1600 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1601 else
1602 pbl_indirect_terminate(dev, pbl);
1603
1604 kvfree(pbl->pbl_buf);
1605 }
1606
efa_create_inline_pbl(struct efa_dev * dev,struct efa_mr * mr,struct efa_com_reg_mr_params * params)1607 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1608 struct efa_com_reg_mr_params *params)
1609 {
1610 int err;
1611
1612 params->inline_pbl = 1;
1613 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1614 params->page_num, params->page_shift);
1615 if (err)
1616 return err;
1617
1618 ibdev_dbg(&dev->ibdev,
1619 "inline_pbl_array - pages[%u]\n", params->page_num);
1620
1621 return 0;
1622 }
1623
efa_create_pbl(struct efa_dev * dev,struct pbl_context * pbl,struct efa_mr * mr,struct efa_com_reg_mr_params * params)1624 static int efa_create_pbl(struct efa_dev *dev,
1625 struct pbl_context *pbl,
1626 struct efa_mr *mr,
1627 struct efa_com_reg_mr_params *params)
1628 {
1629 int err;
1630
1631 err = pbl_create(dev, pbl, mr->umem, params->page_num,
1632 params->page_shift);
1633 if (err) {
1634 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1635 return err;
1636 }
1637
1638 params->inline_pbl = 0;
1639 params->indirect = !pbl->physically_continuous;
1640 if (pbl->physically_continuous) {
1641 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1642
1643 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1644 ¶ms->pbl.pbl.address.mem_addr_high,
1645 ¶ms->pbl.pbl.address.mem_addr_low);
1646 } else {
1647 params->pbl.pbl.length =
1648 pbl->phys.indirect.chunk_list.chunks[0].length;
1649
1650 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1651 ¶ms->pbl.pbl.address.mem_addr_high,
1652 ¶ms->pbl.pbl.address.mem_addr_low);
1653 }
1654
1655 return 0;
1656 }
1657
efa_alloc_mr(struct ib_pd * ibpd,int access_flags,struct ib_udata * udata)1658 static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags,
1659 struct ib_udata *udata)
1660 {
1661 struct efa_dev *dev = to_edev(ibpd->device);
1662 int supp_access_flags;
1663 struct efa_mr *mr;
1664
1665 if (udata && udata->inlen &&
1666 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1667 ibdev_dbg(&dev->ibdev,
1668 "Incompatible ABI params, udata not cleared\n");
1669 return ERR_PTR(-EINVAL);
1670 }
1671
1672 supp_access_flags =
1673 IB_ACCESS_LOCAL_WRITE |
1674 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0) |
1675 (EFA_DEV_CAP(dev, RDMA_WRITE) ? IB_ACCESS_REMOTE_WRITE : 0);
1676
1677 access_flags &= ~IB_ACCESS_OPTIONAL;
1678 if (access_flags & ~supp_access_flags) {
1679 ibdev_dbg(&dev->ibdev,
1680 "Unsupported access flags[%#x], supported[%#x]\n",
1681 access_flags, supp_access_flags);
1682 return ERR_PTR(-EOPNOTSUPP);
1683 }
1684
1685 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1686 if (!mr)
1687 return ERR_PTR(-ENOMEM);
1688
1689 return mr;
1690 }
1691
efa_register_mr(struct ib_pd * ibpd,struct efa_mr * mr,u64 start,u64 length,u64 virt_addr,int access_flags)1692 static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start,
1693 u64 length, u64 virt_addr, int access_flags)
1694 {
1695 struct efa_dev *dev = to_edev(ibpd->device);
1696 struct efa_com_reg_mr_params params = {};
1697 struct efa_com_reg_mr_result result = {};
1698 struct pbl_context pbl;
1699 unsigned int pg_sz;
1700 int inline_size;
1701 int err;
1702
1703 params.pd = to_epd(ibpd)->pdn;
1704 params.iova = virt_addr;
1705 params.mr_length_in_bytes = length;
1706 params.permissions = access_flags;
1707
1708 pg_sz = ib_umem_find_best_pgsz(mr->umem,
1709 dev->dev_attr.page_size_cap,
1710 virt_addr);
1711 if (!pg_sz) {
1712 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1713 dev->dev_attr.page_size_cap);
1714 return -EOPNOTSUPP;
1715 }
1716
1717 params.page_shift = order_base_2(pg_sz);
1718 params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);
1719
1720 ibdev_dbg(&dev->ibdev,
1721 "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1722 start, length, params.page_shift, params.page_num);
1723
1724 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1725 if (params.page_num <= inline_size) {
1726 err = efa_create_inline_pbl(dev, mr, ¶ms);
1727 if (err)
1728 return err;
1729
1730 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1731 if (err)
1732 return err;
1733 } else {
1734 err = efa_create_pbl(dev, &pbl, mr, ¶ms);
1735 if (err)
1736 return err;
1737
1738 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1739 pbl_destroy(dev, &pbl);
1740
1741 if (err)
1742 return err;
1743 }
1744
1745 mr->ibmr.lkey = result.l_key;
1746 mr->ibmr.rkey = result.r_key;
1747 mr->ibmr.length = length;
1748 mr->ic_info.recv_ic_id = result.ic_info.recv_ic_id;
1749 mr->ic_info.rdma_read_ic_id = result.ic_info.rdma_read_ic_id;
1750 mr->ic_info.rdma_recv_ic_id = result.ic_info.rdma_recv_ic_id;
1751 mr->ic_info.recv_ic_id_valid = result.ic_info.recv_ic_id_valid;
1752 mr->ic_info.rdma_read_ic_id_valid = result.ic_info.rdma_read_ic_id_valid;
1753 mr->ic_info.rdma_recv_ic_id_valid = result.ic_info.rdma_recv_ic_id_valid;
1754 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1755
1756 return 0;
1757 }
1758
efa_reg_user_mr_dmabuf(struct ib_pd * ibpd,u64 start,u64 length,u64 virt_addr,int fd,int access_flags,struct ib_dmah * dmah,struct uverbs_attr_bundle * attrs)1759 struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,
1760 u64 length, u64 virt_addr,
1761 int fd, int access_flags,
1762 struct ib_dmah *dmah,
1763 struct uverbs_attr_bundle *attrs)
1764 {
1765 struct efa_dev *dev = to_edev(ibpd->device);
1766 struct ib_umem_dmabuf *umem_dmabuf;
1767 struct efa_mr *mr;
1768 int err;
1769
1770 if (dmah) {
1771 err = -EOPNOTSUPP;
1772 goto err_out;
1773 }
1774
1775 mr = efa_alloc_mr(ibpd, access_flags, &attrs->driver_udata);
1776 if (IS_ERR(mr)) {
1777 err = PTR_ERR(mr);
1778 goto err_out;
1779 }
1780
1781 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd,
1782 access_flags);
1783 if (IS_ERR(umem_dmabuf)) {
1784 err = PTR_ERR(umem_dmabuf);
1785 ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%pe]\n",
1786 umem_dmabuf);
1787 goto err_free;
1788 }
1789
1790 mr->umem = &umem_dmabuf->umem;
1791 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1792 if (err)
1793 goto err_release;
1794
1795 return &mr->ibmr;
1796
1797 err_release:
1798 ib_umem_release(mr->umem);
1799 err_free:
1800 kfree(mr);
1801 err_out:
1802 atomic64_inc(&dev->stats.reg_mr_err);
1803 return ERR_PTR(err);
1804 }
1805
efa_reg_mr(struct ib_pd * ibpd,u64 start,u64 length,u64 virt_addr,int access_flags,struct ib_dmah * dmah,struct ib_udata * udata)1806 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1807 u64 virt_addr, int access_flags,
1808 struct ib_dmah *dmah,
1809 struct ib_udata *udata)
1810 {
1811 struct efa_dev *dev = to_edev(ibpd->device);
1812 struct efa_mr *mr;
1813 int err;
1814
1815 if (dmah) {
1816 err = -EOPNOTSUPP;
1817 goto err_out;
1818 }
1819
1820 mr = efa_alloc_mr(ibpd, access_flags, udata);
1821 if (IS_ERR(mr)) {
1822 err = PTR_ERR(mr);
1823 goto err_out;
1824 }
1825
1826 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1827 if (IS_ERR(mr->umem)) {
1828 err = PTR_ERR(mr->umem);
1829 ibdev_dbg(&dev->ibdev,
1830 "Failed to pin and map user space memory[%pe]\n",
1831 mr->umem);
1832 goto err_free;
1833 }
1834
1835 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);
1836 if (err)
1837 goto err_release;
1838
1839 return &mr->ibmr;
1840
1841 err_release:
1842 ib_umem_release(mr->umem);
1843 err_free:
1844 kfree(mr);
1845 err_out:
1846 atomic64_inc(&dev->stats.reg_mr_err);
1847 return ERR_PTR(err);
1848 }
1849
UVERBS_HANDLER(EFA_IB_METHOD_MR_QUERY)1850 static int UVERBS_HANDLER(EFA_IB_METHOD_MR_QUERY)(struct uverbs_attr_bundle *attrs)
1851 {
1852 struct ib_mr *ibmr = uverbs_attr_get_obj(attrs, EFA_IB_ATTR_QUERY_MR_HANDLE);
1853 struct efa_mr *mr = to_emr(ibmr);
1854 u16 ic_id_validity = 0;
1855 int ret;
1856
1857 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,
1858 &mr->ic_info.recv_ic_id, sizeof(mr->ic_info.recv_ic_id));
1859 if (ret)
1860 return ret;
1861
1862 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,
1863 &mr->ic_info.rdma_read_ic_id, sizeof(mr->ic_info.rdma_read_ic_id));
1864 if (ret)
1865 return ret;
1866
1867 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,
1868 &mr->ic_info.rdma_recv_ic_id, sizeof(mr->ic_info.rdma_recv_ic_id));
1869 if (ret)
1870 return ret;
1871
1872 if (mr->ic_info.recv_ic_id_valid)
1873 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RECV_IC_ID;
1874 if (mr->ic_info.rdma_read_ic_id_valid)
1875 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_READ_IC_ID;
1876 if (mr->ic_info.rdma_recv_ic_id_valid)
1877 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_RECV_IC_ID;
1878
1879 return uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,
1880 &ic_id_validity, sizeof(ic_id_validity));
1881 }
1882
efa_dereg_mr(struct ib_mr * ibmr,struct ib_udata * udata)1883 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1884 {
1885 struct efa_dev *dev = to_edev(ibmr->device);
1886 struct efa_com_dereg_mr_params params;
1887 struct efa_mr *mr = to_emr(ibmr);
1888 int err;
1889
1890 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1891
1892 params.l_key = mr->ibmr.lkey;
1893 err = efa_com_dereg_mr(&dev->edev, ¶ms);
1894 if (err)
1895 return err;
1896
1897 ib_umem_release(mr->umem);
1898 kfree(mr);
1899
1900 return 0;
1901 }
1902
efa_get_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)1903 int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,
1904 struct ib_port_immutable *immutable)
1905 {
1906 struct ib_port_attr attr;
1907 int err;
1908
1909 err = ib_query_port(ibdev, port_num, &attr);
1910 if (err) {
1911 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1912 return err;
1913 }
1914
1915 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1916 immutable->gid_tbl_len = attr.gid_tbl_len;
1917
1918 return 0;
1919 }
1920
efa_dealloc_uar(struct efa_dev * dev,u16 uarn)1921 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1922 {
1923 struct efa_com_dealloc_uar_params params = {
1924 .uarn = uarn,
1925 };
1926
1927 return efa_com_dealloc_uar(&dev->edev, ¶ms);
1928 }
1929
1930 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
1931 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
1932 NULL : #_attr)
1933
efa_user_comp_handshake(const struct ib_ucontext * ibucontext,const struct efa_ibv_alloc_ucontext_cmd * cmd)1934 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
1935 const struct efa_ibv_alloc_ucontext_cmd *cmd)
1936 {
1937 struct efa_dev *dev = to_edev(ibucontext->device);
1938 char *attr_str;
1939
1940 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
1941 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
1942 goto err;
1943
1944 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
1945 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
1946 attr_str))
1947 goto err;
1948
1949 return 0;
1950
1951 err:
1952 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
1953 attr_str);
1954 return -EOPNOTSUPP;
1955 }
1956
efa_alloc_ucontext(struct ib_ucontext * ibucontext,struct ib_udata * udata)1957 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1958 {
1959 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1960 struct efa_dev *dev = to_edev(ibucontext->device);
1961 struct efa_ibv_alloc_ucontext_resp resp = {};
1962 struct efa_ibv_alloc_ucontext_cmd cmd = {};
1963 struct efa_com_alloc_uar_result result;
1964 int err;
1965
1966 /*
1967 * it's fine if the driver does not know all request fields,
1968 * we will ack input fields in our response.
1969 */
1970
1971 err = ib_copy_from_udata(&cmd, udata,
1972 min(sizeof(cmd), udata->inlen));
1973 if (err) {
1974 ibdev_dbg(&dev->ibdev,
1975 "Cannot copy udata for alloc_ucontext\n");
1976 goto err_out;
1977 }
1978
1979 err = efa_user_comp_handshake(ibucontext, &cmd);
1980 if (err)
1981 goto err_out;
1982
1983 err = efa_com_alloc_uar(&dev->edev, &result);
1984 if (err)
1985 goto err_out;
1986
1987 ucontext->uarn = result.uarn;
1988
1989 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1990 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1991 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1992 resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1993 resp.max_llq_size = dev->dev_attr.max_llq_size;
1994 resp.max_tx_batch = dev->dev_attr.max_tx_batch;
1995 resp.min_sq_wr = dev->dev_attr.min_sq_depth;
1996
1997 err = ib_copy_to_udata(udata, &resp,
1998 min(sizeof(resp), udata->outlen));
1999 if (err)
2000 goto err_dealloc_uar;
2001
2002 return 0;
2003
2004 err_dealloc_uar:
2005 efa_dealloc_uar(dev, result.uarn);
2006 err_out:
2007 atomic64_inc(&dev->stats.alloc_ucontext_err);
2008 return err;
2009 }
2010
efa_dealloc_ucontext(struct ib_ucontext * ibucontext)2011 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
2012 {
2013 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
2014 struct efa_dev *dev = to_edev(ibucontext->device);
2015
2016 efa_dealloc_uar(dev, ucontext->uarn);
2017 }
2018
efa_mmap_free(struct rdma_user_mmap_entry * rdma_entry)2019 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
2020 {
2021 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
2022
2023 kfree(entry);
2024 }
2025
__efa_mmap(struct efa_dev * dev,struct efa_ucontext * ucontext,struct vm_area_struct * vma)2026 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
2027 struct vm_area_struct *vma)
2028 {
2029 struct rdma_user_mmap_entry *rdma_entry;
2030 struct efa_user_mmap_entry *entry;
2031 unsigned long va;
2032 int err = 0;
2033 u64 pfn;
2034
2035 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
2036 if (!rdma_entry) {
2037 ibdev_dbg(&dev->ibdev,
2038 "pgoff[%#lx] does not have valid entry\n",
2039 vma->vm_pgoff);
2040 atomic64_inc(&dev->stats.mmap_err);
2041 return -EINVAL;
2042 }
2043 entry = to_emmap(rdma_entry);
2044
2045 ibdev_dbg(&dev->ibdev,
2046 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
2047 entry->address, rdma_entry->npages * PAGE_SIZE,
2048 entry->mmap_flag);
2049
2050 pfn = entry->address >> PAGE_SHIFT;
2051 switch (entry->mmap_flag) {
2052 case EFA_MMAP_IO_NC:
2053 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
2054 entry->rdma_entry.npages * PAGE_SIZE,
2055 pgprot_noncached(vma->vm_page_prot),
2056 rdma_entry);
2057 break;
2058 case EFA_MMAP_IO_WC:
2059 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
2060 entry->rdma_entry.npages * PAGE_SIZE,
2061 pgprot_writecombine(vma->vm_page_prot),
2062 rdma_entry);
2063 break;
2064 case EFA_MMAP_DMA_PAGE:
2065 for (va = vma->vm_start; va < vma->vm_end;
2066 va += PAGE_SIZE, pfn++) {
2067 err = vm_insert_page(vma, va, pfn_to_page(pfn));
2068 if (err)
2069 break;
2070 }
2071 break;
2072 default:
2073 err = -EINVAL;
2074 }
2075
2076 if (err) {
2077 ibdev_dbg(
2078 &dev->ibdev,
2079 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
2080 entry->address, rdma_entry->npages * PAGE_SIZE,
2081 entry->mmap_flag, err);
2082 atomic64_inc(&dev->stats.mmap_err);
2083 }
2084
2085 rdma_user_mmap_entry_put(rdma_entry);
2086 return err;
2087 }
2088
efa_mmap(struct ib_ucontext * ibucontext,struct vm_area_struct * vma)2089 int efa_mmap(struct ib_ucontext *ibucontext,
2090 struct vm_area_struct *vma)
2091 {
2092 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
2093 struct efa_dev *dev = to_edev(ibucontext->device);
2094 size_t length = vma->vm_end - vma->vm_start;
2095
2096 ibdev_dbg(&dev->ibdev,
2097 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
2098 vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
2099
2100 return __efa_mmap(dev, ucontext, vma);
2101 }
2102
efa_ah_destroy(struct efa_dev * dev,struct efa_ah * ah)2103 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
2104 {
2105 struct efa_com_destroy_ah_params params = {
2106 .ah = ah->ah,
2107 .pdn = to_epd(ah->ibah.pd)->pdn,
2108 };
2109
2110 return efa_com_destroy_ah(&dev->edev, ¶ms);
2111 }
2112
efa_create_ah(struct ib_ah * ibah,struct rdma_ah_init_attr * init_attr,struct ib_udata * udata)2113 int efa_create_ah(struct ib_ah *ibah,
2114 struct rdma_ah_init_attr *init_attr,
2115 struct ib_udata *udata)
2116 {
2117 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
2118 struct efa_dev *dev = to_edev(ibah->device);
2119 struct efa_com_create_ah_params params = {};
2120 struct efa_ibv_create_ah_resp resp = {};
2121 struct efa_com_create_ah_result result;
2122 struct efa_ah *ah = to_eah(ibah);
2123 int err;
2124
2125 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
2126 ibdev_dbg(&dev->ibdev,
2127 "Create address handle is not supported in atomic context\n");
2128 err = -EOPNOTSUPP;
2129 goto err_out;
2130 }
2131
2132 if (udata->inlen &&
2133 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
2134 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
2135 err = -EINVAL;
2136 goto err_out;
2137 }
2138
2139 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
2140 sizeof(params.dest_addr));
2141 params.pdn = to_epd(ibah->pd)->pdn;
2142 err = efa_com_create_ah(&dev->edev, ¶ms, &result);
2143 if (err)
2144 goto err_out;
2145
2146 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
2147 ah->ah = result.ah;
2148
2149 resp.efa_address_handle = result.ah;
2150
2151 if (udata->outlen) {
2152 err = ib_copy_to_udata(udata, &resp,
2153 min(sizeof(resp), udata->outlen));
2154 if (err) {
2155 ibdev_dbg(&dev->ibdev,
2156 "Failed to copy udata for create_ah response\n");
2157 goto err_destroy_ah;
2158 }
2159 }
2160 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
2161
2162 return 0;
2163
2164 err_destroy_ah:
2165 efa_ah_destroy(dev, ah);
2166 err_out:
2167 atomic64_inc(&dev->stats.create_ah_err);
2168 return err;
2169 }
2170
efa_destroy_ah(struct ib_ah * ibah,u32 flags)2171 int efa_destroy_ah(struct ib_ah *ibah, u32 flags)
2172 {
2173 struct efa_dev *dev = to_edev(ibah->pd->device);
2174 struct efa_ah *ah = to_eah(ibah);
2175
2176 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
2177
2178 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
2179 ibdev_dbg(&dev->ibdev,
2180 "Destroy address handle is not supported in atomic context\n");
2181 return -EOPNOTSUPP;
2182 }
2183
2184 efa_ah_destroy(dev, ah);
2185 return 0;
2186 }
2187
efa_alloc_hw_port_stats(struct ib_device * ibdev,u32 port_num)2188 struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev,
2189 u32 port_num)
2190 {
2191 return rdma_alloc_hw_stats_struct(efa_port_stats_descs,
2192 ARRAY_SIZE(efa_port_stats_descs),
2193 RDMA_HW_STATS_DEFAULT_LIFESPAN);
2194 }
2195
efa_alloc_hw_device_stats(struct ib_device * ibdev)2196 struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev)
2197 {
2198 return rdma_alloc_hw_stats_struct(efa_device_stats_descs,
2199 ARRAY_SIZE(efa_device_stats_descs),
2200 RDMA_HW_STATS_DEFAULT_LIFESPAN);
2201 }
2202
efa_fill_device_stats(struct efa_dev * dev,struct rdma_hw_stats * stats)2203 static int efa_fill_device_stats(struct efa_dev *dev,
2204 struct rdma_hw_stats *stats)
2205 {
2206 struct efa_com_stats_admin *as = &dev->edev.aq.stats;
2207 struct efa_stats *s = &dev->stats;
2208
2209 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
2210 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
2211 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
2212 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
2213
2214 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
2215 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);
2216 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);
2217 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);
2218 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);
2219 stats->value[EFA_ALLOC_UCONTEXT_ERR] =
2220 atomic64_read(&s->alloc_ucontext_err);
2221 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);
2222 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);
2223
2224 return ARRAY_SIZE(efa_device_stats_descs);
2225 }
2226
efa_fill_port_stats(struct efa_dev * dev,struct rdma_hw_stats * stats,u32 port_num)2227 static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats,
2228 u32 port_num)
2229 {
2230 struct efa_com_get_stats_params params = {};
2231 union efa_com_get_stats_result result;
2232 struct efa_com_rdma_write_stats *rws;
2233 struct efa_com_rdma_read_stats *rrs;
2234 struct efa_com_messages_stats *ms;
2235 struct efa_com_network_stats *ns;
2236 struct efa_com_basic_stats *bs;
2237 int err;
2238
2239 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
2240 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
2241
2242 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
2243 if (err)
2244 return err;
2245
2246 bs = &result.basic_stats;
2247 stats->value[EFA_TX_BYTES] = bs->tx_bytes;
2248 stats->value[EFA_TX_PKTS] = bs->tx_pkts;
2249 stats->value[EFA_RX_BYTES] = bs->rx_bytes;
2250 stats->value[EFA_RX_PKTS] = bs->rx_pkts;
2251 stats->value[EFA_RX_DROPS] = bs->rx_drops;
2252
2253 params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;
2254 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
2255 if (err)
2256 return err;
2257
2258 ms = &result.messages_stats;
2259 stats->value[EFA_SEND_BYTES] = ms->send_bytes;
2260 stats->value[EFA_SEND_WRS] = ms->send_wrs;
2261 stats->value[EFA_RECV_BYTES] = ms->recv_bytes;
2262 stats->value[EFA_RECV_WRS] = ms->recv_wrs;
2263
2264 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;
2265 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
2266 if (err)
2267 return err;
2268
2269 rrs = &result.rdma_read_stats;
2270 stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;
2271 stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;
2272 stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;
2273 stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;
2274
2275 if (EFA_DEV_CAP(dev, RDMA_WRITE)) {
2276 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_WRITE;
2277 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
2278 if (err)
2279 return err;
2280
2281 rws = &result.rdma_write_stats;
2282 stats->value[EFA_RDMA_WRITE_WRS] = rws->write_wrs;
2283 stats->value[EFA_RDMA_WRITE_BYTES] = rws->write_bytes;
2284 stats->value[EFA_RDMA_WRITE_WR_ERR] = rws->write_wr_err;
2285 stats->value[EFA_RDMA_WRITE_RECV_BYTES] = rws->write_recv_bytes;
2286 }
2287
2288 params.type = EFA_ADMIN_GET_STATS_TYPE_NETWORK;
2289 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
2290 if (err)
2291 return err;
2292
2293 ns = &result.network_stats;
2294 stats->value[EFA_RETRANS_BYTES] = ns->retrans_bytes;
2295 stats->value[EFA_RETRANS_PKTS] = ns->retrans_pkts;
2296 stats->value[EFA_RETRANS_TIMEOUT_EVENS] = ns->retrans_timeout_events;
2297 stats->value[EFA_UNRESPONSIVE_REMOTE_EVENTS] = ns->unresponsive_remote_events;
2298 stats->value[EFA_IMPAIRED_REMOTE_CONN_EVENTS] = ns->impaired_remote_conn_events;
2299
2300 return ARRAY_SIZE(efa_port_stats_descs);
2301 }
2302
efa_get_hw_stats(struct ib_device * ibdev,struct rdma_hw_stats * stats,u32 port_num,int index)2303 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
2304 u32 port_num, int index)
2305 {
2306 if (port_num)
2307 return efa_fill_port_stats(to_edev(ibdev), stats, port_num);
2308 else
2309 return efa_fill_device_stats(to_edev(ibdev), stats);
2310 }
2311
efa_port_link_layer(struct ib_device * ibdev,u32 port_num)2312 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
2313 u32 port_num)
2314 {
2315 return IB_LINK_LAYER_UNSPECIFIED;
2316 }
2317
2318 DECLARE_UVERBS_NAMED_METHOD(EFA_IB_METHOD_MR_QUERY,
2319 UVERBS_ATTR_IDR(EFA_IB_ATTR_QUERY_MR_HANDLE,
2320 UVERBS_OBJECT_MR,
2321 UVERBS_ACCESS_READ,
2322 UA_MANDATORY),
2323 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,
2324 UVERBS_ATTR_TYPE(u16),
2325 UA_MANDATORY),
2326 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,
2327 UVERBS_ATTR_TYPE(u16),
2328 UA_MANDATORY),
2329 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,
2330 UVERBS_ATTR_TYPE(u16),
2331 UA_MANDATORY),
2332 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,
2333 UVERBS_ATTR_TYPE(u16),
2334 UA_MANDATORY));
2335
2336 ADD_UVERBS_METHODS(efa_mr,
2337 UVERBS_OBJECT_MR,
2338 &UVERBS_METHOD(EFA_IB_METHOD_MR_QUERY));
2339
2340 const struct uapi_definition efa_uapi_defs[] = {
2341 UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_MR,
2342 &efa_mr),
2343 {},
2344 };
2345