1 /* 2 * Copyright (c) 2016 Hisilicon Limited. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include <linux/platform_device.h> 34 #include <rdma/ib_umem.h> 35 #include "hns_roce_device.h" 36 #include "hns_roce_cmd.h" 37 #include "hns_roce_hem.h" 38 #include <rdma/hns-abi.h> 39 #include "hns_roce_common.h" 40 41 static void hns_roce_ib_cq_comp(struct hns_roce_cq *hr_cq) 42 { 43 struct ib_cq *ibcq = &hr_cq->ib_cq; 44 45 ibcq->comp_handler(ibcq, ibcq->cq_context); 46 } 47 48 static void hns_roce_ib_cq_event(struct hns_roce_cq *hr_cq, 49 enum hns_roce_event event_type) 50 { 51 struct hns_roce_dev *hr_dev; 52 struct ib_event event; 53 struct ib_cq *ibcq; 54 55 ibcq = &hr_cq->ib_cq; 56 hr_dev = to_hr_dev(ibcq->device); 57 58 if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID && 59 event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR && 60 event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) { 61 dev_err(hr_dev->dev, 62 "hns_roce_ib: Unexpected event type 0x%x on CQ %06lx\n", 63 event_type, hr_cq->cqn); 64 return; 65 } 66 67 if (ibcq->event_handler) { 68 event.device = ibcq->device; 69 event.event = IB_EVENT_CQ_ERR; 70 event.element.cq = ibcq; 71 ibcq->event_handler(&event, ibcq->cq_context); 72 } 73 } 74 75 static int hns_roce_sw2hw_cq(struct hns_roce_dev *dev, 76 struct hns_roce_cmd_mailbox *mailbox, 77 unsigned long cq_num) 78 { 79 return hns_roce_cmd_mbox(dev, mailbox->dma, 0, cq_num, 0, 80 HNS_ROCE_CMD_SW2HW_CQ, HNS_ROCE_CMD_TIMEOUT_MSECS); 81 } 82 83 static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent, 84 struct hns_roce_mtt *hr_mtt, 85 struct hns_roce_uar *hr_uar, 86 struct hns_roce_cq *hr_cq, int vector) 87 { 88 struct hns_roce_cmd_mailbox *mailbox; 89 struct hns_roce_hem_table *mtt_table; 90 struct hns_roce_cq_table *cq_table; 91 struct device *dev = hr_dev->dev; 92 dma_addr_t dma_handle; 93 u64 *mtts; 94 int ret; 95 96 cq_table = &hr_dev->cq_table; 97 98 /* Get the physical address of cq buf */ 99 if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE)) 100 mtt_table = &hr_dev->mr_table.mtt_cqe_table; 101 else 102 mtt_table = &hr_dev->mr_table.mtt_table; 103 104 mtts = hns_roce_table_find(hr_dev, mtt_table, 105 hr_mtt->first_seg, &dma_handle); 106 if (!mtts) { 107 dev_err(dev, "CQ alloc.Failed to find cq buf addr.\n"); 108 return -EINVAL; 109 } 110 111 if (vector >= hr_dev->caps.num_comp_vectors) { 112 dev_err(dev, "CQ alloc.Invalid vector.\n"); 113 return -EINVAL; 114 } 115 hr_cq->vector = vector; 116 117 ret = hns_roce_bitmap_alloc(&cq_table->bitmap, &hr_cq->cqn); 118 if (ret == -1) { 119 dev_err(dev, "CQ alloc.Failed to alloc index.\n"); 120 return -ENOMEM; 121 } 122 123 /* Get CQC memory HEM(Hardware Entry Memory) table */ 124 ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn); 125 if (ret) { 126 dev_err(dev, "CQ alloc.Failed to get context mem.\n"); 127 goto err_out; 128 } 129 130 /* The cq insert radix tree */ 131 spin_lock_irq(&cq_table->lock); 132 /* Radix_tree: The associated pointer and long integer key value like */ 133 ret = radix_tree_insert(&cq_table->tree, hr_cq->cqn, hr_cq); 134 spin_unlock_irq(&cq_table->lock); 135 if (ret) { 136 dev_err(dev, "CQ alloc.Failed to radix_tree_insert.\n"); 137 goto err_put; 138 } 139 140 /* Allocate mailbox memory */ 141 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); 142 if (IS_ERR(mailbox)) { 143 ret = PTR_ERR(mailbox); 144 goto err_radix; 145 } 146 147 hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle, 148 nent, vector); 149 150 /* Send mailbox to hw */ 151 ret = hns_roce_sw2hw_cq(hr_dev, mailbox, hr_cq->cqn); 152 hns_roce_free_cmd_mailbox(hr_dev, mailbox); 153 if (ret) { 154 dev_err(dev, "CQ alloc.Failed to cmd mailbox.\n"); 155 goto err_radix; 156 } 157 158 hr_cq->cons_index = 0; 159 hr_cq->arm_sn = 1; 160 hr_cq->uar = hr_uar; 161 162 atomic_set(&hr_cq->refcount, 1); 163 init_completion(&hr_cq->free); 164 165 return 0; 166 167 err_radix: 168 spin_lock_irq(&cq_table->lock); 169 radix_tree_delete(&cq_table->tree, hr_cq->cqn); 170 spin_unlock_irq(&cq_table->lock); 171 172 err_put: 173 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn); 174 175 err_out: 176 hns_roce_bitmap_free(&cq_table->bitmap, hr_cq->cqn, BITMAP_NO_RR); 177 return ret; 178 } 179 180 static int hns_roce_hw2sw_cq(struct hns_roce_dev *dev, 181 struct hns_roce_cmd_mailbox *mailbox, 182 unsigned long cq_num) 183 { 184 return hns_roce_cmd_mbox(dev, 0, mailbox ? mailbox->dma : 0, cq_num, 185 mailbox ? 0 : 1, HNS_ROCE_CMD_HW2SW_CQ, 186 HNS_ROCE_CMD_TIMEOUT_MSECS); 187 } 188 189 void hns_roce_free_cq(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) 190 { 191 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; 192 struct device *dev = hr_dev->dev; 193 int ret; 194 195 ret = hns_roce_hw2sw_cq(hr_dev, NULL, hr_cq->cqn); 196 if (ret) 197 dev_err(dev, "HW2SW_CQ failed (%d) for CQN %06lx\n", ret, 198 hr_cq->cqn); 199 if (hr_dev->eq_table.eq) { 200 /* Waiting interrupt process procedure carried out */ 201 synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq); 202 203 /* wait for all interrupt processed */ 204 if (atomic_dec_and_test(&hr_cq->refcount)) 205 complete(&hr_cq->free); 206 wait_for_completion(&hr_cq->free); 207 } 208 209 spin_lock_irq(&cq_table->lock); 210 radix_tree_delete(&cq_table->tree, hr_cq->cqn); 211 spin_unlock_irq(&cq_table->lock); 212 213 hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn); 214 hns_roce_bitmap_free(&cq_table->bitmap, hr_cq->cqn, BITMAP_NO_RR); 215 } 216 EXPORT_SYMBOL_GPL(hns_roce_free_cq); 217 218 static int hns_roce_ib_get_cq_umem(struct hns_roce_dev *hr_dev, 219 struct ib_ucontext *context, 220 struct hns_roce_cq_buf *buf, 221 struct ib_umem **umem, u64 buf_addr, int cqe) 222 { 223 int ret; 224 u32 page_shift; 225 u32 npages; 226 227 *umem = ib_umem_get(context, buf_addr, cqe * hr_dev->caps.cq_entry_sz, 228 IB_ACCESS_LOCAL_WRITE, 1); 229 if (IS_ERR(*umem)) 230 return PTR_ERR(*umem); 231 232 if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE)) 233 buf->hr_mtt.mtt_type = MTT_TYPE_CQE; 234 else 235 buf->hr_mtt.mtt_type = MTT_TYPE_WQE; 236 237 if (hr_dev->caps.cqe_buf_pg_sz) { 238 npages = (ib_umem_page_count(*umem) + 239 (1 << hr_dev->caps.cqe_buf_pg_sz) - 1) / 240 (1 << hr_dev->caps.cqe_buf_pg_sz); 241 page_shift = PAGE_SHIFT + hr_dev->caps.cqe_buf_pg_sz; 242 ret = hns_roce_mtt_init(hr_dev, npages, page_shift, 243 &buf->hr_mtt); 244 } else { 245 ret = hns_roce_mtt_init(hr_dev, ib_umem_page_count(*umem), 246 (*umem)->page_shift, 247 &buf->hr_mtt); 248 } 249 if (ret) 250 goto err_buf; 251 252 ret = hns_roce_ib_umem_write_mtt(hr_dev, &buf->hr_mtt, *umem); 253 if (ret) 254 goto err_mtt; 255 256 return 0; 257 258 err_mtt: 259 hns_roce_mtt_cleanup(hr_dev, &buf->hr_mtt); 260 261 err_buf: 262 ib_umem_release(*umem); 263 return ret; 264 } 265 266 static int hns_roce_ib_alloc_cq_buf(struct hns_roce_dev *hr_dev, 267 struct hns_roce_cq_buf *buf, u32 nent) 268 { 269 int ret; 270 u32 page_shift = PAGE_SHIFT + hr_dev->caps.cqe_buf_pg_sz; 271 272 ret = hns_roce_buf_alloc(hr_dev, nent * hr_dev->caps.cq_entry_sz, 273 (1 << page_shift) * 2, &buf->hr_buf, 274 page_shift); 275 if (ret) 276 goto out; 277 278 if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE)) 279 buf->hr_mtt.mtt_type = MTT_TYPE_CQE; 280 else 281 buf->hr_mtt.mtt_type = MTT_TYPE_WQE; 282 283 ret = hns_roce_mtt_init(hr_dev, buf->hr_buf.npages, 284 buf->hr_buf.page_shift, &buf->hr_mtt); 285 if (ret) 286 goto err_buf; 287 288 ret = hns_roce_buf_write_mtt(hr_dev, &buf->hr_mtt, &buf->hr_buf); 289 if (ret) 290 goto err_mtt; 291 292 return 0; 293 294 err_mtt: 295 hns_roce_mtt_cleanup(hr_dev, &buf->hr_mtt); 296 297 err_buf: 298 hns_roce_buf_free(hr_dev, nent * hr_dev->caps.cq_entry_sz, 299 &buf->hr_buf); 300 out: 301 return ret; 302 } 303 304 static void hns_roce_ib_free_cq_buf(struct hns_roce_dev *hr_dev, 305 struct hns_roce_cq_buf *buf, int cqe) 306 { 307 hns_roce_buf_free(hr_dev, (cqe + 1) * hr_dev->caps.cq_entry_sz, 308 &buf->hr_buf); 309 } 310 311 struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev, 312 const struct ib_cq_init_attr *attr, 313 struct ib_ucontext *context, 314 struct ib_udata *udata) 315 { 316 struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); 317 struct device *dev = hr_dev->dev; 318 struct hns_roce_ib_create_cq ucmd; 319 struct hns_roce_cq *hr_cq = NULL; 320 struct hns_roce_uar *uar = NULL; 321 int vector = attr->comp_vector; 322 int cq_entries = attr->cqe; 323 int ret; 324 325 if (cq_entries < 1 || cq_entries > hr_dev->caps.max_cqes) { 326 dev_err(dev, "Creat CQ failed. entries=%d, max=%d\n", 327 cq_entries, hr_dev->caps.max_cqes); 328 return ERR_PTR(-EINVAL); 329 } 330 331 hr_cq = kzalloc(sizeof(*hr_cq), GFP_KERNEL); 332 if (!hr_cq) 333 return ERR_PTR(-ENOMEM); 334 335 if (hr_dev->caps.min_cqes) 336 cq_entries = max(cq_entries, hr_dev->caps.min_cqes); 337 338 cq_entries = roundup_pow_of_two((unsigned int)cq_entries); 339 hr_cq->ib_cq.cqe = cq_entries - 1; 340 spin_lock_init(&hr_cq->lock); 341 342 if (context) { 343 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { 344 dev_err(dev, "Failed to copy_from_udata.\n"); 345 ret = -EFAULT; 346 goto err_cq; 347 } 348 349 /* Get user space address, write it into mtt table */ 350 ret = hns_roce_ib_get_cq_umem(hr_dev, context, &hr_cq->hr_buf, 351 &hr_cq->umem, ucmd.buf_addr, 352 cq_entries); 353 if (ret) { 354 dev_err(dev, "Failed to get_cq_umem.\n"); 355 goto err_cq; 356 } 357 358 /* Get user space parameters */ 359 uar = &to_hr_ucontext(context)->uar; 360 } else { 361 /* Init mmt table and write buff address to mtt table */ 362 ret = hns_roce_ib_alloc_cq_buf(hr_dev, &hr_cq->hr_buf, 363 cq_entries); 364 if (ret) { 365 dev_err(dev, "Failed to alloc_cq_buf.\n"); 366 goto err_cq; 367 } 368 369 uar = &hr_dev->priv_uar; 370 hr_cq->cq_db_l = hr_dev->reg_base + hr_dev->odb_offset + 371 DB_REG_OFFSET * uar->index; 372 } 373 374 /* Allocate cq index, fill cq_context */ 375 ret = hns_roce_cq_alloc(hr_dev, cq_entries, &hr_cq->hr_buf.hr_mtt, uar, 376 hr_cq, vector); 377 if (ret) { 378 dev_err(dev, "Creat CQ .Failed to cq_alloc.\n"); 379 goto err_mtt; 380 } 381 382 /* 383 * For the QP created by kernel space, tptr value should be initialized 384 * to zero; For the QP created by user space, it will cause synchronous 385 * problems if tptr is set to zero here, so we initialze it in user 386 * space. 387 */ 388 if (!context && hr_cq->tptr_addr) 389 *hr_cq->tptr_addr = 0; 390 391 /* Get created cq handler and carry out event */ 392 hr_cq->comp = hns_roce_ib_cq_comp; 393 hr_cq->event = hns_roce_ib_cq_event; 394 hr_cq->cq_depth = cq_entries; 395 396 if (context) { 397 if (ib_copy_to_udata(udata, &hr_cq->cqn, sizeof(u64))) { 398 ret = -EFAULT; 399 goto err_cqc; 400 } 401 } 402 403 return &hr_cq->ib_cq; 404 405 err_cqc: 406 hns_roce_free_cq(hr_dev, hr_cq); 407 408 err_mtt: 409 hns_roce_mtt_cleanup(hr_dev, &hr_cq->hr_buf.hr_mtt); 410 if (context) 411 ib_umem_release(hr_cq->umem); 412 else 413 hns_roce_ib_free_cq_buf(hr_dev, &hr_cq->hr_buf, 414 hr_cq->ib_cq.cqe); 415 416 err_cq: 417 kfree(hr_cq); 418 return ERR_PTR(ret); 419 } 420 EXPORT_SYMBOL_GPL(hns_roce_ib_create_cq); 421 422 int hns_roce_ib_destroy_cq(struct ib_cq *ib_cq) 423 { 424 struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device); 425 struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq); 426 int ret = 0; 427 428 if (hr_dev->hw->destroy_cq) { 429 ret = hr_dev->hw->destroy_cq(ib_cq); 430 } else { 431 hns_roce_free_cq(hr_dev, hr_cq); 432 hns_roce_mtt_cleanup(hr_dev, &hr_cq->hr_buf.hr_mtt); 433 434 if (ib_cq->uobject) 435 ib_umem_release(hr_cq->umem); 436 else 437 /* Free the buff of stored cq */ 438 hns_roce_ib_free_cq_buf(hr_dev, &hr_cq->hr_buf, 439 ib_cq->cqe); 440 441 kfree(hr_cq); 442 } 443 444 return ret; 445 } 446 EXPORT_SYMBOL_GPL(hns_roce_ib_destroy_cq); 447 448 void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn) 449 { 450 struct device *dev = hr_dev->dev; 451 struct hns_roce_cq *cq; 452 453 cq = radix_tree_lookup(&hr_dev->cq_table.tree, 454 cqn & (hr_dev->caps.num_cqs - 1)); 455 if (!cq) { 456 dev_warn(dev, "Completion event for bogus CQ 0x%08x\n", cqn); 457 return; 458 } 459 460 ++cq->arm_sn; 461 cq->comp(cq); 462 } 463 464 void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type) 465 { 466 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; 467 struct device *dev = hr_dev->dev; 468 struct hns_roce_cq *cq; 469 470 cq = radix_tree_lookup(&cq_table->tree, 471 cqn & (hr_dev->caps.num_cqs - 1)); 472 if (cq) 473 atomic_inc(&cq->refcount); 474 475 if (!cq) { 476 dev_warn(dev, "Async event for bogus CQ %08x\n", cqn); 477 return; 478 } 479 480 cq->event(cq, (enum hns_roce_event)event_type); 481 482 if (atomic_dec_and_test(&cq->refcount)) 483 complete(&cq->free); 484 } 485 486 int hns_roce_init_cq_table(struct hns_roce_dev *hr_dev) 487 { 488 struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; 489 490 spin_lock_init(&cq_table->lock); 491 INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC); 492 493 return hns_roce_bitmap_init(&cq_table->bitmap, hr_dev->caps.num_cqs, 494 hr_dev->caps.num_cqs - 1, 495 hr_dev->caps.reserved_cqs, 0); 496 } 497 498 void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev) 499 { 500 hns_roce_bitmap_cleanup(&hr_dev->cq_table.bitmap); 501 } 502