1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright (c) 2018 Hisilicon Limited. 4 */ 5 6 #include <rdma/ib_umem.h> 7 #include <rdma/hns-abi.h> 8 #include "hns_roce_device.h" 9 #include "hns_roce_cmd.h" 10 #include "hns_roce_hem.h" 11 12 void hns_roce_srq_event(struct hns_roce_dev *hr_dev, u32 srqn, int event_type) 13 { 14 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table; 15 struct hns_roce_srq *srq; 16 17 xa_lock(&srq_table->xa); 18 srq = xa_load(&srq_table->xa, srqn & (hr_dev->caps.num_srqs - 1)); 19 if (srq) 20 atomic_inc(&srq->refcount); 21 xa_unlock(&srq_table->xa); 22 23 if (!srq) { 24 dev_warn(hr_dev->dev, "Async event for bogus SRQ %08x\n", srqn); 25 return; 26 } 27 28 srq->event(srq, event_type); 29 30 if (atomic_dec_and_test(&srq->refcount)) 31 complete(&srq->free); 32 } 33 34 static void hns_roce_ib_srq_event(struct hns_roce_srq *srq, 35 enum hns_roce_event event_type) 36 { 37 struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device); 38 struct ib_srq *ibsrq = &srq->ibsrq; 39 struct ib_event event; 40 41 if (ibsrq->event_handler) { 42 event.device = ibsrq->device; 43 event.element.srq = ibsrq; 44 switch (event_type) { 45 case HNS_ROCE_EVENT_TYPE_SRQ_LIMIT_REACH: 46 event.event = IB_EVENT_SRQ_LIMIT_REACHED; 47 break; 48 case HNS_ROCE_EVENT_TYPE_SRQ_CATAS_ERROR: 49 event.event = IB_EVENT_SRQ_ERR; 50 break; 51 default: 52 dev_err(hr_dev->dev, 53 "hns_roce:Unexpected event type 0x%x on SRQ %06lx\n", 54 event_type, srq->srqn); 55 return; 56 } 57 58 ibsrq->event_handler(&event, ibsrq->srq_context); 59 } 60 } 61 62 static int hns_roce_hw_create_srq(struct hns_roce_dev *dev, 63 struct hns_roce_cmd_mailbox *mailbox, 64 unsigned long srq_num) 65 { 66 return hns_roce_cmd_mbox(dev, mailbox->dma, 0, srq_num, 0, 67 HNS_ROCE_CMD_CREATE_SRQ, 68 HNS_ROCE_CMD_TIMEOUT_MSECS); 69 } 70 71 static int hns_roce_hw_destroy_srq(struct hns_roce_dev *dev, 72 struct hns_roce_cmd_mailbox *mailbox, 73 unsigned long srq_num) 74 { 75 return hns_roce_cmd_mbox(dev, 0, mailbox ? mailbox->dma : 0, srq_num, 76 mailbox ? 0 : 1, HNS_ROCE_CMD_DESTROY_SRQ, 77 HNS_ROCE_CMD_TIMEOUT_MSECS); 78 } 79 80 static int hns_roce_srq_alloc(struct hns_roce_dev *hr_dev, u32 pdn, u32 cqn, 81 u16 xrcd, struct hns_roce_mtt *hr_mtt, 82 u64 db_rec_addr, struct hns_roce_srq *srq) 83 { 84 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table; 85 struct hns_roce_cmd_mailbox *mailbox; 86 dma_addr_t dma_handle_wqe; 87 dma_addr_t dma_handle_idx; 88 u64 *mtts_wqe; 89 u64 *mtts_idx; 90 int ret; 91 92 /* Get the physical address of srq buf */ 93 mtts_wqe = hns_roce_table_find(hr_dev, 94 &hr_dev->mr_table.mtt_srqwqe_table, 95 srq->mtt.first_seg, 96 &dma_handle_wqe); 97 if (!mtts_wqe) { 98 dev_err(hr_dev->dev, "Failed to find mtt for srq buf.\n"); 99 return -EINVAL; 100 } 101 102 /* Get physical address of idx que buf */ 103 mtts_idx = hns_roce_table_find(hr_dev, &hr_dev->mr_table.mtt_idx_table, 104 srq->idx_que.mtt.first_seg, 105 &dma_handle_idx); 106 if (!mtts_idx) { 107 dev_err(hr_dev->dev, 108 "Failed to find mtt for srq idx queue buf.\n"); 109 return -EINVAL; 110 } 111 112 ret = hns_roce_bitmap_alloc(&srq_table->bitmap, &srq->srqn); 113 if (ret) { 114 dev_err(hr_dev->dev, 115 "Failed to alloc a bit from srq bitmap.\n"); 116 return -ENOMEM; 117 } 118 119 ret = hns_roce_table_get(hr_dev, &srq_table->table, srq->srqn); 120 if (ret) 121 goto err_out; 122 123 ret = xa_err(xa_store(&srq_table->xa, srq->srqn, srq, GFP_KERNEL)); 124 if (ret) 125 goto err_put; 126 127 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); 128 if (IS_ERR(mailbox)) { 129 ret = PTR_ERR(mailbox); 130 goto err_xa; 131 } 132 133 hr_dev->hw->write_srqc(hr_dev, srq, pdn, xrcd, cqn, mailbox->buf, 134 mtts_wqe, mtts_idx, dma_handle_wqe, 135 dma_handle_idx); 136 137 ret = hns_roce_hw_create_srq(hr_dev, mailbox, srq->srqn); 138 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 139 if (ret) 140 goto err_xa; 141 142 atomic_set(&srq->refcount, 1); 143 init_completion(&srq->free); 144 return ret; 145 146 err_xa: 147 xa_erase(&srq_table->xa, srq->srqn); 148 149 err_put: 150 hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn); 151 152 err_out: 153 hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR); 154 return ret; 155 } 156 157 static void hns_roce_srq_free(struct hns_roce_dev *hr_dev, 158 struct hns_roce_srq *srq) 159 { 160 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table; 161 int ret; 162 163 ret = hns_roce_hw_destroy_srq(hr_dev, NULL, srq->srqn); 164 if (ret) 165 dev_err(hr_dev->dev, "DESTROY_SRQ failed (%d) for SRQN %06lx\n", 166 ret, srq->srqn); 167 168 xa_erase(&srq_table->xa, srq->srqn); 169 170 if (atomic_dec_and_test(&srq->refcount)) 171 complete(&srq->free); 172 wait_for_completion(&srq->free); 173 174 hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn); 175 hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR); 176 } 177 178 static int create_user_srq(struct hns_roce_srq *srq, struct ib_udata *udata, 179 int srq_buf_size) 180 { 181 struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device); 182 struct hns_roce_ib_create_srq ucmd; 183 struct hns_roce_buf *buf; 184 int ret; 185 186 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) 187 return -EFAULT; 188 189 srq->umem = 190 ib_umem_get(srq->ibsrq.device, ucmd.buf_addr, srq_buf_size, 0); 191 if (IS_ERR(srq->umem)) 192 return PTR_ERR(srq->umem); 193 194 buf = &srq->buf; 195 buf->npages = (ib_umem_page_count(srq->umem) + 196 (1 << hr_dev->caps.srqwqe_buf_pg_sz) - 1) / 197 (1 << hr_dev->caps.srqwqe_buf_pg_sz); 198 buf->page_shift = PAGE_SHIFT + hr_dev->caps.srqwqe_buf_pg_sz; 199 ret = hns_roce_mtt_init(hr_dev, buf->npages, buf->page_shift, 200 &srq->mtt); 201 if (ret) 202 goto err_user_buf; 203 204 ret = hns_roce_ib_umem_write_mtt(hr_dev, &srq->mtt, srq->umem); 205 if (ret) 206 goto err_user_srq_mtt; 207 208 /* config index queue BA */ 209 srq->idx_que.umem = ib_umem_get(srq->ibsrq.device, ucmd.que_addr, 210 srq->idx_que.buf_size, 0); 211 if (IS_ERR(srq->idx_que.umem)) { 212 dev_err(hr_dev->dev, "ib_umem_get error for index queue\n"); 213 ret = PTR_ERR(srq->idx_que.umem); 214 goto err_user_srq_mtt; 215 } 216 217 buf = &srq->idx_que.idx_buf; 218 buf->npages = DIV_ROUND_UP(ib_umem_page_count(srq->idx_que.umem), 219 1 << hr_dev->caps.idx_buf_pg_sz); 220 buf->page_shift = PAGE_SHIFT + hr_dev->caps.idx_buf_pg_sz; 221 ret = hns_roce_mtt_init(hr_dev, buf->npages, buf->page_shift, 222 &srq->idx_que.mtt); 223 if (ret) { 224 dev_err(hr_dev->dev, "hns_roce_mtt_init error for idx que\n"); 225 goto err_user_idx_mtt; 226 } 227 228 ret = hns_roce_ib_umem_write_mtt(hr_dev, &srq->idx_que.mtt, 229 srq->idx_que.umem); 230 if (ret) { 231 dev_err(hr_dev->dev, 232 "hns_roce_ib_umem_write_mtt error for idx que\n"); 233 goto err_user_idx_buf; 234 } 235 236 return 0; 237 238 err_user_idx_buf: 239 hns_roce_mtt_cleanup(hr_dev, &srq->idx_que.mtt); 240 241 err_user_idx_mtt: 242 ib_umem_release(srq->idx_que.umem); 243 244 err_user_srq_mtt: 245 hns_roce_mtt_cleanup(hr_dev, &srq->mtt); 246 247 err_user_buf: 248 ib_umem_release(srq->umem); 249 250 return ret; 251 } 252 253 static int hns_roce_create_idx_que(struct ib_pd *pd, struct hns_roce_srq *srq, 254 u32 page_shift) 255 { 256 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); 257 struct hns_roce_idx_que *idx_que = &srq->idx_que; 258 259 idx_que->bitmap = bitmap_zalloc(srq->wqe_cnt, GFP_KERNEL); 260 if (!idx_que->bitmap) 261 return -ENOMEM; 262 263 idx_que->buf_size = srq->idx_que.buf_size; 264 265 if (hns_roce_buf_alloc(hr_dev, idx_que->buf_size, (1 << page_shift) * 2, 266 &idx_que->idx_buf, page_shift)) { 267 bitmap_free(idx_que->bitmap); 268 return -ENOMEM; 269 } 270 271 return 0; 272 } 273 274 static int create_kernel_srq(struct hns_roce_srq *srq, int srq_buf_size) 275 { 276 struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device); 277 u32 page_shift = PAGE_SHIFT + hr_dev->caps.srqwqe_buf_pg_sz; 278 int ret; 279 280 if (hns_roce_buf_alloc(hr_dev, srq_buf_size, (1 << page_shift) * 2, 281 &srq->buf, page_shift)) 282 return -ENOMEM; 283 284 srq->head = 0; 285 srq->tail = srq->wqe_cnt - 1; 286 287 ret = hns_roce_mtt_init(hr_dev, srq->buf.npages, srq->buf.page_shift, 288 &srq->mtt); 289 if (ret) 290 goto err_kernel_buf; 291 292 ret = hns_roce_buf_write_mtt(hr_dev, &srq->mtt, &srq->buf); 293 if (ret) 294 goto err_kernel_srq_mtt; 295 296 page_shift = PAGE_SHIFT + hr_dev->caps.idx_buf_pg_sz; 297 ret = hns_roce_create_idx_que(srq->ibsrq.pd, srq, page_shift); 298 if (ret) { 299 dev_err(hr_dev->dev, "Create idx queue fail(%d)!\n", ret); 300 goto err_kernel_srq_mtt; 301 } 302 303 /* Init mtt table for idx_que */ 304 ret = hns_roce_mtt_init(hr_dev, srq->idx_que.idx_buf.npages, 305 srq->idx_que.idx_buf.page_shift, 306 &srq->idx_que.mtt); 307 if (ret) 308 goto err_kernel_create_idx; 309 310 /* Write buffer address into the mtt table */ 311 ret = hns_roce_buf_write_mtt(hr_dev, &srq->idx_que.mtt, 312 &srq->idx_que.idx_buf); 313 if (ret) 314 goto err_kernel_idx_buf; 315 316 srq->wrid = kvmalloc_array(srq->wqe_cnt, sizeof(u64), GFP_KERNEL); 317 if (!srq->wrid) { 318 ret = -ENOMEM; 319 goto err_kernel_idx_buf; 320 } 321 322 return 0; 323 324 err_kernel_idx_buf: 325 hns_roce_mtt_cleanup(hr_dev, &srq->idx_que.mtt); 326 327 err_kernel_create_idx: 328 hns_roce_buf_free(hr_dev, srq->idx_que.buf_size, 329 &srq->idx_que.idx_buf); 330 kfree(srq->idx_que.bitmap); 331 332 err_kernel_srq_mtt: 333 hns_roce_mtt_cleanup(hr_dev, &srq->mtt); 334 335 err_kernel_buf: 336 hns_roce_buf_free(hr_dev, srq_buf_size, &srq->buf); 337 338 return ret; 339 } 340 341 static void destroy_user_srq(struct hns_roce_dev *hr_dev, 342 struct hns_roce_srq *srq) 343 { 344 hns_roce_mtt_cleanup(hr_dev, &srq->idx_que.mtt); 345 ib_umem_release(srq->idx_que.umem); 346 hns_roce_mtt_cleanup(hr_dev, &srq->mtt); 347 ib_umem_release(srq->umem); 348 } 349 350 static void destroy_kernel_srq(struct hns_roce_dev *hr_dev, 351 struct hns_roce_srq *srq, int srq_buf_size) 352 { 353 kvfree(srq->wrid); 354 hns_roce_mtt_cleanup(hr_dev, &srq->idx_que.mtt); 355 hns_roce_buf_free(hr_dev, srq->idx_que.buf_size, &srq->idx_que.idx_buf); 356 kfree(srq->idx_que.bitmap); 357 hns_roce_mtt_cleanup(hr_dev, &srq->mtt); 358 hns_roce_buf_free(hr_dev, srq_buf_size, &srq->buf); 359 } 360 361 int hns_roce_create_srq(struct ib_srq *ib_srq, 362 struct ib_srq_init_attr *init_attr, 363 struct ib_udata *udata) 364 { 365 struct hns_roce_dev *hr_dev = to_hr_dev(ib_srq->device); 366 struct hns_roce_ib_create_srq_resp resp = {}; 367 struct hns_roce_srq *srq = to_hr_srq(ib_srq); 368 int srq_desc_size; 369 int srq_buf_size; 370 int ret = 0; 371 u32 cqn; 372 373 /* Check the actual SRQ wqe and SRQ sge num */ 374 if (init_attr->attr.max_wr >= hr_dev->caps.max_srq_wrs || 375 init_attr->attr.max_sge > hr_dev->caps.max_srq_sges) 376 return -EINVAL; 377 378 mutex_init(&srq->mutex); 379 spin_lock_init(&srq->lock); 380 381 srq->wqe_cnt = roundup_pow_of_two(init_attr->attr.max_wr + 1); 382 srq->max_gs = init_attr->attr.max_sge; 383 384 srq_desc_size = roundup_pow_of_two(max(16, 16 * srq->max_gs)); 385 386 srq->wqe_shift = ilog2(srq_desc_size); 387 388 srq_buf_size = srq->wqe_cnt * srq_desc_size; 389 390 srq->idx_que.entry_sz = HNS_ROCE_IDX_QUE_ENTRY_SZ; 391 srq->idx_que.buf_size = srq->wqe_cnt * srq->idx_que.entry_sz; 392 srq->mtt.mtt_type = MTT_TYPE_SRQWQE; 393 srq->idx_que.mtt.mtt_type = MTT_TYPE_IDX; 394 395 if (udata) { 396 ret = create_user_srq(srq, udata, srq_buf_size); 397 if (ret) { 398 dev_err(hr_dev->dev, "Create user srq failed\n"); 399 goto err_srq; 400 } 401 } else { 402 ret = create_kernel_srq(srq, srq_buf_size); 403 if (ret) { 404 dev_err(hr_dev->dev, "Create kernel srq failed\n"); 405 goto err_srq; 406 } 407 } 408 409 cqn = ib_srq_has_cq(init_attr->srq_type) ? 410 to_hr_cq(init_attr->ext.cq)->cqn : 0; 411 412 srq->db_reg_l = hr_dev->reg_base + SRQ_DB_REG; 413 414 ret = hns_roce_srq_alloc(hr_dev, to_hr_pd(ib_srq->pd)->pdn, cqn, 0, 415 &srq->mtt, 0, srq); 416 if (ret) 417 goto err_wrid; 418 419 srq->event = hns_roce_ib_srq_event; 420 resp.srqn = srq->srqn; 421 422 if (udata) { 423 if (ib_copy_to_udata(udata, &resp, 424 min(udata->outlen, sizeof(resp)))) { 425 ret = -EFAULT; 426 goto err_srqc_alloc; 427 } 428 } 429 430 return 0; 431 432 err_srqc_alloc: 433 hns_roce_srq_free(hr_dev, srq); 434 435 err_wrid: 436 if (udata) 437 destroy_user_srq(hr_dev, srq); 438 else 439 destroy_kernel_srq(hr_dev, srq, srq_buf_size); 440 441 err_srq: 442 return ret; 443 } 444 445 void hns_roce_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) 446 { 447 struct hns_roce_dev *hr_dev = to_hr_dev(ibsrq->device); 448 struct hns_roce_srq *srq = to_hr_srq(ibsrq); 449 450 hns_roce_srq_free(hr_dev, srq); 451 hns_roce_mtt_cleanup(hr_dev, &srq->mtt); 452 453 if (udata) { 454 hns_roce_mtt_cleanup(hr_dev, &srq->idx_que.mtt); 455 } else { 456 kvfree(srq->wrid); 457 hns_roce_buf_free(hr_dev, srq->wqe_cnt << srq->wqe_shift, 458 &srq->buf); 459 } 460 ib_umem_release(srq->idx_que.umem); 461 ib_umem_release(srq->umem); 462 } 463 464 int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev) 465 { 466 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table; 467 468 xa_init(&srq_table->xa); 469 470 return hns_roce_bitmap_init(&srq_table->bitmap, hr_dev->caps.num_srqs, 471 hr_dev->caps.num_srqs - 1, 472 hr_dev->caps.reserved_srqs, 0); 473 } 474 475 void hns_roce_cleanup_srq_table(struct hns_roce_dev *hr_dev) 476 { 477 hns_roce_bitmap_cleanup(&hr_dev->srq_table.bitmap); 478 } 479