1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2015 - 2021 Intel Corporation */ 3 #include "osdep.h" 4 #include "hmc.h" 5 #include "defs.h" 6 #include "type.h" 7 #include "protos.h" 8 #include "pble.h" 9 10 static int add_pble_prm(struct irdma_hmc_pble_rsrc *pble_rsrc); 11 12 /** 13 * irdma_destroy_pble_prm - destroy prm during module unload 14 * @pble_rsrc: pble resources 15 */ 16 void irdma_destroy_pble_prm(struct irdma_hmc_pble_rsrc *pble_rsrc) 17 { 18 struct irdma_chunk *chunk; 19 struct irdma_pble_prm *pinfo = &pble_rsrc->pinfo; 20 21 while (!list_empty(&pinfo->clist)) { 22 chunk = (struct irdma_chunk *) pinfo->clist.next; 23 list_del(&chunk->list); 24 if (chunk->type == PBLE_SD_PAGED) 25 irdma_pble_free_paged_mem(chunk); 26 bitmap_free(chunk->bitmapbuf); 27 kfree(chunk->chunkmem.va); 28 } 29 } 30 31 /** 32 * irdma_hmc_init_pble - Initialize pble resources during module load 33 * @dev: irdma_sc_dev struct 34 * @pble_rsrc: pble resources 35 */ 36 int irdma_hmc_init_pble(struct irdma_sc_dev *dev, 37 struct irdma_hmc_pble_rsrc *pble_rsrc) 38 { 39 struct irdma_hmc_info *hmc_info; 40 u32 fpm_idx = 0; 41 int status = 0; 42 43 hmc_info = dev->hmc_info; 44 pble_rsrc->dev = dev; 45 pble_rsrc->fpm_base_addr = hmc_info->hmc_obj[IRDMA_HMC_IW_PBLE].base; 46 /* Start pble' on 4k boundary */ 47 if (pble_rsrc->fpm_base_addr & 0xfff) 48 fpm_idx = (4096 - (pble_rsrc->fpm_base_addr & 0xfff)) >> 3; 49 pble_rsrc->unallocated_pble = 50 hmc_info->hmc_obj[IRDMA_HMC_IW_PBLE].cnt - fpm_idx; 51 pble_rsrc->next_fpm_addr = pble_rsrc->fpm_base_addr + (fpm_idx << 3); 52 pble_rsrc->pinfo.pble_shift = PBLE_SHIFT; 53 54 mutex_init(&pble_rsrc->pble_mutex_lock); 55 56 spin_lock_init(&pble_rsrc->pinfo.prm_lock); 57 INIT_LIST_HEAD(&pble_rsrc->pinfo.clist); 58 if (add_pble_prm(pble_rsrc)) { 59 irdma_destroy_pble_prm(pble_rsrc); 60 status = -ENOMEM; 61 } 62 63 return status; 64 } 65 66 /** 67 * get_sd_pd_idx - Returns sd index, pd index and rel_pd_idx from fpm address 68 * @pble_rsrc: structure containing fpm address 69 * @idx: where to return indexes 70 */ 71 static void get_sd_pd_idx(struct irdma_hmc_pble_rsrc *pble_rsrc, 72 struct sd_pd_idx *idx) 73 { 74 idx->sd_idx = (u32)pble_rsrc->next_fpm_addr / IRDMA_HMC_DIRECT_BP_SIZE; 75 idx->pd_idx = (u32)(pble_rsrc->next_fpm_addr / IRDMA_HMC_PAGED_BP_SIZE); 76 idx->rel_pd_idx = (idx->pd_idx % IRDMA_HMC_PD_CNT_IN_SD); 77 } 78 79 /** 80 * add_sd_direct - add sd direct for pble 81 * @pble_rsrc: pble resource ptr 82 * @info: page info for sd 83 */ 84 static int add_sd_direct(struct irdma_hmc_pble_rsrc *pble_rsrc, 85 struct irdma_add_page_info *info) 86 { 87 struct irdma_sc_dev *dev = pble_rsrc->dev; 88 int ret_code = 0; 89 struct sd_pd_idx *idx = &info->idx; 90 struct irdma_chunk *chunk = info->chunk; 91 struct irdma_hmc_info *hmc_info = info->hmc_info; 92 struct irdma_hmc_sd_entry *sd_entry = info->sd_entry; 93 u32 offset = 0; 94 95 if (!sd_entry->valid) { 96 ret_code = irdma_add_sd_table_entry(dev->hw, hmc_info, 97 info->idx.sd_idx, 98 IRDMA_SD_TYPE_DIRECT, 99 IRDMA_HMC_DIRECT_BP_SIZE); 100 if (ret_code) 101 return ret_code; 102 103 chunk->type = PBLE_SD_CONTIGOUS; 104 } 105 106 offset = idx->rel_pd_idx << HMC_PAGED_BP_SHIFT; 107 chunk->size = info->pages << HMC_PAGED_BP_SHIFT; 108 chunk->vaddr = sd_entry->u.bp.addr.va + offset; 109 chunk->fpm_addr = pble_rsrc->next_fpm_addr; 110 ibdev_dbg(to_ibdev(dev), 111 "PBLE: chunk_size[%lld] = 0x%llx vaddr=0x%p fpm_addr = %llx\n", 112 chunk->size, chunk->size, chunk->vaddr, chunk->fpm_addr); 113 114 return 0; 115 } 116 117 /** 118 * fpm_to_idx - given fpm address, get pble index 119 * @pble_rsrc: pble resource management 120 * @addr: fpm address for index 121 */ 122 static u32 fpm_to_idx(struct irdma_hmc_pble_rsrc *pble_rsrc, u64 addr) 123 { 124 u64 idx; 125 126 idx = (addr - (pble_rsrc->fpm_base_addr)) >> 3; 127 128 return (u32)idx; 129 } 130 131 /** 132 * add_bp_pages - add backing pages for sd 133 * @pble_rsrc: pble resource management 134 * @info: page info for sd 135 */ 136 static int add_bp_pages(struct irdma_hmc_pble_rsrc *pble_rsrc, 137 struct irdma_add_page_info *info) 138 { 139 struct irdma_sc_dev *dev = pble_rsrc->dev; 140 u8 *addr; 141 struct irdma_dma_mem mem; 142 struct irdma_hmc_pd_entry *pd_entry; 143 struct irdma_hmc_sd_entry *sd_entry = info->sd_entry; 144 struct irdma_hmc_info *hmc_info = info->hmc_info; 145 struct irdma_chunk *chunk = info->chunk; 146 int status = 0; 147 u32 rel_pd_idx = info->idx.rel_pd_idx; 148 u32 pd_idx = info->idx.pd_idx; 149 u32 i; 150 151 if (irdma_pble_get_paged_mem(chunk, info->pages)) 152 return -ENOMEM; 153 154 status = irdma_add_sd_table_entry(dev->hw, hmc_info, info->idx.sd_idx, 155 IRDMA_SD_TYPE_PAGED, 156 IRDMA_HMC_DIRECT_BP_SIZE); 157 if (status) 158 goto error; 159 160 addr = chunk->vaddr; 161 for (i = 0; i < info->pages; i++) { 162 mem.pa = (u64)chunk->dmainfo.dmaaddrs[i]; 163 mem.size = 4096; 164 mem.va = addr; 165 pd_entry = &sd_entry->u.pd_table.pd_entry[rel_pd_idx++]; 166 if (!pd_entry->valid) { 167 status = irdma_add_pd_table_entry(dev, hmc_info, 168 pd_idx++, &mem); 169 if (status) 170 goto error; 171 172 addr += 4096; 173 } 174 } 175 176 chunk->fpm_addr = pble_rsrc->next_fpm_addr; 177 return 0; 178 179 error: 180 irdma_pble_free_paged_mem(chunk); 181 182 return status; 183 } 184 185 /** 186 * irdma_get_type - add a sd entry type for sd 187 * @dev: irdma_sc_dev struct 188 * @idx: index of sd 189 * @pages: pages in the sd 190 */ 191 static enum irdma_sd_entry_type irdma_get_type(struct irdma_sc_dev *dev, 192 struct sd_pd_idx *idx, u32 pages) 193 { 194 enum irdma_sd_entry_type sd_entry_type; 195 196 if (dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_3) 197 sd_entry_type = (!idx->rel_pd_idx && 198 pages == IRDMA_HMC_PD_CNT_IN_SD) ? 199 IRDMA_SD_TYPE_DIRECT : IRDMA_SD_TYPE_PAGED; 200 else 201 sd_entry_type = (!idx->rel_pd_idx && 202 pages == IRDMA_HMC_PD_CNT_IN_SD && 203 dev->privileged) ? 204 IRDMA_SD_TYPE_DIRECT : IRDMA_SD_TYPE_PAGED; 205 return sd_entry_type; 206 } 207 208 /** 209 * add_pble_prm - add a sd entry for pble resoure 210 * @pble_rsrc: pble resource management 211 */ 212 static int add_pble_prm(struct irdma_hmc_pble_rsrc *pble_rsrc) 213 { 214 struct irdma_sc_dev *dev = pble_rsrc->dev; 215 struct irdma_hmc_sd_entry *sd_entry; 216 struct irdma_hmc_info *hmc_info; 217 struct irdma_chunk *chunk; 218 struct irdma_add_page_info info; 219 struct sd_pd_idx *idx = &info.idx; 220 int ret_code = 0; 221 enum irdma_sd_entry_type sd_entry_type; 222 u64 sd_reg_val = 0; 223 struct irdma_virt_mem chunkmem; 224 u32 pages; 225 226 if (pble_rsrc->unallocated_pble < PBLE_PER_PAGE) 227 return -ENOMEM; 228 229 if (pble_rsrc->next_fpm_addr & 0xfff) 230 return -EINVAL; 231 232 chunkmem.size = sizeof(*chunk); 233 chunkmem.va = kzalloc(chunkmem.size, GFP_KERNEL); 234 if (!chunkmem.va) 235 return -ENOMEM; 236 237 chunk = chunkmem.va; 238 chunk->chunkmem = chunkmem; 239 hmc_info = dev->hmc_info; 240 chunk->dev = dev; 241 chunk->fpm_addr = pble_rsrc->next_fpm_addr; 242 get_sd_pd_idx(pble_rsrc, idx); 243 sd_entry = &hmc_info->sd_table.sd_entry[idx->sd_idx]; 244 pages = (idx->rel_pd_idx) ? (IRDMA_HMC_PD_CNT_IN_SD - idx->rel_pd_idx) : 245 IRDMA_HMC_PD_CNT_IN_SD; 246 pages = min(pages, pble_rsrc->unallocated_pble >> PBLE_512_SHIFT); 247 info.chunk = chunk; 248 info.hmc_info = hmc_info; 249 info.pages = pages; 250 info.sd_entry = sd_entry; 251 if (!sd_entry->valid) 252 sd_entry_type = irdma_get_type(dev, idx, pages); 253 else 254 sd_entry_type = sd_entry->entry_type; 255 256 ibdev_dbg(to_ibdev(dev), 257 "PBLE: pages = %d, unallocated_pble[%d] current_fpm_addr = %llx\n", 258 pages, pble_rsrc->unallocated_pble, 259 pble_rsrc->next_fpm_addr); 260 ibdev_dbg(to_ibdev(dev), "PBLE: sd_entry_type = %d\n", sd_entry_type); 261 if (sd_entry_type == IRDMA_SD_TYPE_DIRECT) 262 ret_code = add_sd_direct(pble_rsrc, &info); 263 264 if (ret_code) 265 sd_entry_type = IRDMA_SD_TYPE_PAGED; 266 else 267 pble_rsrc->stats_direct_sds++; 268 269 if (sd_entry_type == IRDMA_SD_TYPE_PAGED) { 270 ret_code = add_bp_pages(pble_rsrc, &info); 271 if (ret_code) 272 goto error; 273 else 274 pble_rsrc->stats_paged_sds++; 275 } 276 277 ret_code = irdma_prm_add_pble_mem(&pble_rsrc->pinfo, chunk); 278 if (ret_code) 279 goto error; 280 281 pble_rsrc->next_fpm_addr += chunk->size; 282 ibdev_dbg(to_ibdev(dev), 283 "PBLE: next_fpm_addr = %llx chunk_size[%llu] = 0x%llx\n", 284 pble_rsrc->next_fpm_addr, chunk->size, chunk->size); 285 pble_rsrc->unallocated_pble -= (u32)(chunk->size >> 3); 286 sd_reg_val = (sd_entry_type == IRDMA_SD_TYPE_PAGED) ? 287 sd_entry->u.pd_table.pd_page_addr.pa : 288 sd_entry->u.bp.addr.pa; 289 if ((dev->privileged && !sd_entry->valid) || 290 dev->hw_attrs.uk_attrs.hw_rev >= IRDMA_GEN_3) { 291 ret_code = irdma_hmc_sd_one(dev, hmc_info->hmc_fn_id, 292 sd_reg_val, idx->sd_idx, 293 sd_entry->entry_type, true); 294 if (ret_code) 295 goto error; 296 } 297 298 list_add(&chunk->list, &pble_rsrc->pinfo.clist); 299 sd_entry->valid = true; 300 return 0; 301 302 error: 303 bitmap_free(chunk->bitmapbuf); 304 kfree(chunk->chunkmem.va); 305 306 return ret_code; 307 } 308 309 /** 310 * free_lvl2 - fee level 2 pble 311 * @pble_rsrc: pble resource management 312 * @palloc: level 2 pble allocation 313 */ 314 static void free_lvl2(struct irdma_hmc_pble_rsrc *pble_rsrc, 315 struct irdma_pble_alloc *palloc) 316 { 317 u32 i; 318 struct irdma_pble_level2 *lvl2 = &palloc->level2; 319 struct irdma_pble_info *root = &lvl2->root; 320 struct irdma_pble_info *leaf = lvl2->leaf; 321 322 for (i = 0; i < lvl2->leaf_cnt; i++, leaf++) { 323 if (leaf->addr) 324 irdma_prm_return_pbles(&pble_rsrc->pinfo, 325 &leaf->chunkinfo); 326 else 327 break; 328 } 329 330 if (root->addr) 331 irdma_prm_return_pbles(&pble_rsrc->pinfo, &root->chunkinfo); 332 333 kfree(lvl2->leafmem.va); 334 lvl2->leaf = NULL; 335 } 336 337 /** 338 * get_lvl2_pble - get level 2 pble resource 339 * @pble_rsrc: pble resource management 340 * @palloc: level 2 pble allocation 341 */ 342 static int get_lvl2_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, 343 struct irdma_pble_alloc *palloc) 344 { 345 u32 lf4k, lflast, total, i; 346 u32 pblcnt = PBLE_PER_PAGE; 347 u64 *addr; 348 struct irdma_pble_level2 *lvl2 = &palloc->level2; 349 struct irdma_pble_info *root = &lvl2->root; 350 struct irdma_pble_info *leaf; 351 int ret_code; 352 u64 fpm_addr; 353 354 /* number of full 512 (4K) leafs) */ 355 lf4k = palloc->total_cnt >> 9; 356 lflast = palloc->total_cnt % PBLE_PER_PAGE; 357 total = (lflast == 0) ? lf4k : lf4k + 1; 358 lvl2->leaf_cnt = total; 359 360 lvl2->leafmem.size = (sizeof(*leaf) * total); 361 lvl2->leafmem.va = kzalloc(lvl2->leafmem.size, GFP_KERNEL); 362 if (!lvl2->leafmem.va) 363 return -ENOMEM; 364 365 lvl2->leaf = lvl2->leafmem.va; 366 leaf = lvl2->leaf; 367 ret_code = irdma_prm_get_pbles(&pble_rsrc->pinfo, &root->chunkinfo, 368 total << 3, &root->addr, &fpm_addr); 369 if (ret_code) { 370 kfree(lvl2->leafmem.va); 371 lvl2->leaf = NULL; 372 return -ENOMEM; 373 } 374 375 root->idx = fpm_to_idx(pble_rsrc, fpm_addr); 376 root->cnt = total; 377 addr = root->addr; 378 for (i = 0; i < total; i++, leaf++) { 379 pblcnt = (lflast && ((i + 1) == total)) ? 380 lflast : PBLE_PER_PAGE; 381 ret_code = irdma_prm_get_pbles(&pble_rsrc->pinfo, 382 &leaf->chunkinfo, pblcnt << 3, 383 &leaf->addr, &fpm_addr); 384 if (ret_code) 385 goto error; 386 387 leaf->idx = fpm_to_idx(pble_rsrc, fpm_addr); 388 389 leaf->cnt = pblcnt; 390 *addr = (u64)leaf->idx; 391 addr++; 392 } 393 394 palloc->level = PBLE_LEVEL_2; 395 pble_rsrc->stats_lvl2++; 396 return 0; 397 398 error: 399 free_lvl2(pble_rsrc, palloc); 400 401 return -ENOMEM; 402 } 403 404 /** 405 * get_lvl1_pble - get level 1 pble resource 406 * @pble_rsrc: pble resource management 407 * @palloc: level 1 pble allocation 408 */ 409 static int get_lvl1_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, 410 struct irdma_pble_alloc *palloc) 411 { 412 int ret_code; 413 u64 fpm_addr; 414 struct irdma_pble_info *lvl1 = &palloc->level1; 415 416 ret_code = irdma_prm_get_pbles(&pble_rsrc->pinfo, &lvl1->chunkinfo, 417 palloc->total_cnt << 3, &lvl1->addr, 418 &fpm_addr); 419 if (ret_code) 420 return -ENOMEM; 421 422 palloc->level = PBLE_LEVEL_1; 423 lvl1->idx = fpm_to_idx(pble_rsrc, fpm_addr); 424 lvl1->cnt = palloc->total_cnt; 425 pble_rsrc->stats_lvl1++; 426 427 return 0; 428 } 429 430 /** 431 * get_lvl1_lvl2_pble - calls get_lvl1 and get_lvl2 pble routine 432 * @pble_rsrc: pble resources 433 * @palloc: contains all inforamtion regarding pble (idx + pble addr) 434 * @lvl: Bitmask for requested pble level 435 */ 436 static int get_lvl1_lvl2_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, 437 struct irdma_pble_alloc *palloc, u8 lvl) 438 { 439 int status = 0; 440 441 status = get_lvl1_pble(pble_rsrc, palloc); 442 if (!status || lvl == PBLE_LEVEL_1 || palloc->total_cnt <= PBLE_PER_PAGE) 443 return status; 444 445 status = get_lvl2_pble(pble_rsrc, palloc); 446 447 return status; 448 } 449 450 /** 451 * irdma_get_pble - allocate pbles from the prm 452 * @pble_rsrc: pble resources 453 * @palloc: contains all inforamtion regarding pble (idx + pble addr) 454 * @pble_cnt: #of pbles requested 455 * @lvl: requested pble level mask 456 */ 457 int irdma_get_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, 458 struct irdma_pble_alloc *palloc, u32 pble_cnt, 459 u8 lvl) 460 { 461 int status = 0; 462 int max_sds = 0; 463 int i; 464 465 palloc->total_cnt = pble_cnt; 466 palloc->level = PBLE_LEVEL_0; 467 468 mutex_lock(&pble_rsrc->pble_mutex_lock); 469 470 /*check first to see if we can get pble's without acquiring 471 * additional sd's 472 */ 473 status = get_lvl1_lvl2_pble(pble_rsrc, palloc, lvl); 474 if (!status) 475 goto exit; 476 477 max_sds = (palloc->total_cnt >> 18) + 1; 478 for (i = 0; i < max_sds; i++) { 479 status = add_pble_prm(pble_rsrc); 480 if (status) 481 break; 482 483 status = get_lvl1_lvl2_pble(pble_rsrc, palloc, lvl); 484 /* if level1_only, only go through it once */ 485 if (!status || lvl) 486 break; 487 } 488 489 exit: 490 if (!status) { 491 pble_rsrc->allocdpbles += pble_cnt; 492 pble_rsrc->stats_alloc_ok++; 493 } else { 494 pble_rsrc->stats_alloc_fail++; 495 } 496 mutex_unlock(&pble_rsrc->pble_mutex_lock); 497 498 return status; 499 } 500 501 /** 502 * irdma_free_pble - put pbles back into prm 503 * @pble_rsrc: pble resources 504 * @palloc: contains all information regarding pble resource being freed 505 */ 506 void irdma_free_pble(struct irdma_hmc_pble_rsrc *pble_rsrc, 507 struct irdma_pble_alloc *palloc) 508 { 509 pble_rsrc->freedpbles += palloc->total_cnt; 510 511 if (palloc->level == PBLE_LEVEL_2) 512 free_lvl2(pble_rsrc, palloc); 513 else 514 irdma_prm_return_pbles(&pble_rsrc->pinfo, 515 &palloc->level1.chunkinfo); 516 pble_rsrc->stats_alloc_freed++; 517 } 518