1/* 2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. 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/highmem.h> 34#include <linux/kernel.h> 35#include <linux/delay.h> 36#include <linux/mlx5/driver.h> 37#include <linux/xarray.h> 38#include "mlx5_core.h" 39#include "lib/eq.h" 40#include "lib/tout.h" 41 42enum { 43 MLX5_PAGES_CANT_GIVE = 0, 44 MLX5_PAGES_GIVE = 1, 45 MLX5_PAGES_TAKE = 2 46}; 47 48struct mlx5_pages_req { 49 struct mlx5_core_dev *dev; 50 u16 func_id; 51 u8 ec_function; 52 s32 npages; 53 struct work_struct work; 54 u8 release_all; 55}; 56 57struct fw_page { 58 struct rb_node rb_node; 59 u64 addr; 60 struct page *page; 61 u32 function; 62 unsigned long bitmask; 63 struct list_head list; 64 unsigned int free_count; 65}; 66 67enum { 68 MLX5_MAX_RECLAIM_TIME_MILI = 5000, 69 MLX5_NUM_4K_IN_PAGE = PAGE_SIZE / MLX5_ADAPTER_PAGE_SIZE, 70}; 71 72static u32 get_function(u16 func_id, bool ec_function) 73{ 74 return (u32)func_id | (ec_function << 16); 75} 76 77static u16 func_id_to_type(struct mlx5_core_dev *dev, u16 func_id, bool ec_function) 78{ 79 if (!func_id) 80 return mlx5_core_is_ecpf(dev) && !ec_function ? MLX5_HOST_PF : MLX5_PF; 81 82 if (func_id <= max(mlx5_core_max_vfs(dev), mlx5_core_max_ec_vfs(dev))) { 83 if (ec_function) 84 return MLX5_EC_VF; 85 else 86 return MLX5_VF; 87 } 88 return MLX5_SF; 89} 90 91static u32 mlx5_get_ec_function(u32 function) 92{ 93 return function >> 16; 94} 95 96static u32 mlx5_get_func_id(u32 function) 97{ 98 return function & 0xffff; 99} 100 101static struct rb_root *page_root_per_function(struct mlx5_core_dev *dev, u32 function) 102{ 103 struct rb_root *root; 104 int err; 105 106 root = xa_load(&dev->priv.page_root_xa, function); 107 if (root) 108 return root; 109 110 root = kzalloc(sizeof(*root), GFP_KERNEL); 111 if (!root) 112 return ERR_PTR(-ENOMEM); 113 114 err = xa_insert(&dev->priv.page_root_xa, function, root, GFP_KERNEL); 115 if (err) { 116 kfree(root); 117 return ERR_PTR(err); 118 } 119 120 *root = RB_ROOT; 121 122 return root; 123} 124 125static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u32 function) 126{ 127 struct rb_node *parent = NULL; 128 struct rb_root *root; 129 struct rb_node **new; 130 struct fw_page *nfp; 131 struct fw_page *tfp; 132 int i; 133 134 root = page_root_per_function(dev, function); 135 if (IS_ERR(root)) 136 return PTR_ERR(root); 137 138 new = &root->rb_node; 139 140 while (*new) { 141 parent = *new; 142 tfp = rb_entry(parent, struct fw_page, rb_node); 143 if (tfp->addr < addr) 144 new = &parent->rb_left; 145 else if (tfp->addr > addr) 146 new = &parent->rb_right; 147 else 148 return -EEXIST; 149 } 150 151 nfp = kzalloc(sizeof(*nfp), GFP_KERNEL); 152 if (!nfp) 153 return -ENOMEM; 154 155 nfp->addr = addr; 156 nfp->page = page; 157 nfp->function = function; 158 nfp->free_count = MLX5_NUM_4K_IN_PAGE; 159 for (i = 0; i < MLX5_NUM_4K_IN_PAGE; i++) 160 set_bit(i, &nfp->bitmask); 161 162 rb_link_node(&nfp->rb_node, parent, new); 163 rb_insert_color(&nfp->rb_node, root); 164 list_add(&nfp->list, &dev->priv.free_list); 165 166 return 0; 167} 168 169static struct fw_page *find_fw_page(struct mlx5_core_dev *dev, u64 addr, 170 u32 function) 171{ 172 struct fw_page *result = NULL; 173 struct rb_root *root; 174 struct rb_node *tmp; 175 struct fw_page *tfp; 176 177 root = xa_load(&dev->priv.page_root_xa, function); 178 if (WARN_ON_ONCE(!root)) 179 return NULL; 180 181 tmp = root->rb_node; 182 183 while (tmp) { 184 tfp = rb_entry(tmp, struct fw_page, rb_node); 185 if (tfp->addr < addr) { 186 tmp = tmp->rb_left; 187 } else if (tfp->addr > addr) { 188 tmp = tmp->rb_right; 189 } else { 190 result = tfp; 191 break; 192 } 193 } 194 195 return result; 196} 197 198static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id, 199 s32 *npages, int boot) 200{ 201 u32 out[MLX5_ST_SZ_DW(query_pages_out)] = {}; 202 u32 in[MLX5_ST_SZ_DW(query_pages_in)] = {}; 203 int err; 204 205 MLX5_SET(query_pages_in, in, opcode, MLX5_CMD_OP_QUERY_PAGES); 206 MLX5_SET(query_pages_in, in, op_mod, boot ? 207 MLX5_QUERY_PAGES_IN_OP_MOD_BOOT_PAGES : 208 MLX5_QUERY_PAGES_IN_OP_MOD_INIT_PAGES); 209 MLX5_SET(query_pages_in, in, embedded_cpu_function, mlx5_core_is_ecpf(dev)); 210 211 err = mlx5_cmd_exec_inout(dev, query_pages, in, out); 212 if (err) 213 return err; 214 215 *npages = MLX5_GET(query_pages_out, out, num_pages); 216 *func_id = MLX5_GET(query_pages_out, out, function_id); 217 218 return err; 219} 220 221static int alloc_4k(struct mlx5_core_dev *dev, u64 *addr, u32 function) 222{ 223 struct fw_page *fp = NULL; 224 struct fw_page *iter; 225 unsigned n; 226 227 list_for_each_entry(iter, &dev->priv.free_list, list) { 228 if (iter->function != function) 229 continue; 230 fp = iter; 231 } 232 233 if (list_empty(&dev->priv.free_list) || !fp) 234 return -ENOMEM; 235 236 n = find_first_bit(&fp->bitmask, 8 * sizeof(fp->bitmask)); 237 if (n >= MLX5_NUM_4K_IN_PAGE) { 238 mlx5_core_warn(dev, "alloc 4k bug: fw page = 0x%llx, n = %u, bitmask: %lu, max num of 4K pages: %d\n", 239 fp->addr, n, fp->bitmask, MLX5_NUM_4K_IN_PAGE); 240 return -ENOENT; 241 } 242 clear_bit(n, &fp->bitmask); 243 fp->free_count--; 244 if (!fp->free_count) 245 list_del(&fp->list); 246 247 *addr = fp->addr + n * MLX5_ADAPTER_PAGE_SIZE; 248 249 return 0; 250} 251 252#define MLX5_U64_4K_PAGE_MASK ((~(u64)0U) << PAGE_SHIFT) 253 254static void free_fwp(struct mlx5_core_dev *dev, struct fw_page *fwp, 255 bool in_free_list) 256{ 257 struct rb_root *root; 258 259 root = xa_load(&dev->priv.page_root_xa, fwp->function); 260 if (WARN_ON_ONCE(!root)) 261 return; 262 263 rb_erase(&fwp->rb_node, root); 264 if (in_free_list) 265 list_del(&fwp->list); 266 dma_unmap_page(mlx5_core_dma_dev(dev), fwp->addr & MLX5_U64_4K_PAGE_MASK, 267 PAGE_SIZE, DMA_BIDIRECTIONAL); 268 __free_page(fwp->page); 269 kfree(fwp); 270} 271 272static void free_4k(struct mlx5_core_dev *dev, u64 addr, u32 function) 273{ 274 struct fw_page *fwp; 275 int n; 276 277 fwp = find_fw_page(dev, addr & MLX5_U64_4K_PAGE_MASK, function); 278 if (!fwp) { 279 mlx5_core_warn_rl(dev, "page not found\n"); 280 return; 281 } 282 n = (addr & ~MLX5_U64_4K_PAGE_MASK) >> MLX5_ADAPTER_PAGE_SHIFT; 283 fwp->free_count++; 284 set_bit(n, &fwp->bitmask); 285 if (fwp->free_count == MLX5_NUM_4K_IN_PAGE) 286 free_fwp(dev, fwp, fwp->free_count != 1); 287 else if (fwp->free_count == 1) 288 list_add(&fwp->list, &dev->priv.free_list); 289} 290 291static int alloc_system_page(struct mlx5_core_dev *dev, u32 function) 292{ 293 struct device *device = mlx5_core_dma_dev(dev); 294 int nid = dev_to_node(device); 295 struct page *page; 296 u64 zero_addr = 1; 297 u64 addr; 298 int err; 299 300 page = alloc_pages_node(nid, GFP_HIGHUSER, 0); 301 if (!page) { 302 mlx5_core_warn(dev, "failed to allocate page\n"); 303 return -ENOMEM; 304 } 305map: 306 addr = dma_map_page(device, page, 0, PAGE_SIZE, DMA_BIDIRECTIONAL); 307 if (dma_mapping_error(device, addr)) { 308 mlx5_core_warn(dev, "failed dma mapping page\n"); 309 err = -ENOMEM; 310 goto err_mapping; 311 } 312 313 /* Firmware doesn't support page with physical address 0 */ 314 if (addr == 0) { 315 zero_addr = addr; 316 goto map; 317 } 318 319 err = insert_page(dev, addr, page, function); 320 if (err) { 321 mlx5_core_err(dev, "failed to track allocated page\n"); 322 dma_unmap_page(device, addr, PAGE_SIZE, DMA_BIDIRECTIONAL); 323 } 324 325err_mapping: 326 if (err) 327 __free_page(page); 328 329 if (zero_addr == 0) 330 dma_unmap_page(device, zero_addr, PAGE_SIZE, 331 DMA_BIDIRECTIONAL); 332 333 return err; 334} 335 336static void page_notify_fail(struct mlx5_core_dev *dev, u16 func_id, 337 bool ec_function) 338{ 339 u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {}; 340 int err; 341 342 MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES); 343 MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_CANT_GIVE); 344 MLX5_SET(manage_pages_in, in, function_id, func_id); 345 MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function); 346 347 err = mlx5_cmd_exec_in(dev, manage_pages, in); 348 if (err) 349 mlx5_core_warn(dev, "page notify failed func_id(%d) err(%d)\n", 350 func_id, err); 351} 352 353static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages, 354 int event, bool ec_function) 355{ 356 u32 function = get_function(func_id, ec_function); 357 u32 out[MLX5_ST_SZ_DW(manage_pages_out)] = {0}; 358 int inlen = MLX5_ST_SZ_BYTES(manage_pages_in); 359 int notify_fail = event; 360 u16 func_type; 361 u64 addr; 362 int err; 363 u32 *in; 364 int i; 365 366 inlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_in, pas[0]); 367 in = kvzalloc(inlen, GFP_KERNEL); 368 if (!in) { 369 err = -ENOMEM; 370 mlx5_core_warn(dev, "vzalloc failed %d\n", inlen); 371 goto out_free; 372 } 373 374 for (i = 0; i < npages; i++) { 375retry: 376 err = alloc_4k(dev, &addr, function); 377 if (err) { 378 if (err == -ENOMEM) 379 err = alloc_system_page(dev, function); 380 if (err) { 381 dev->priv.fw_pages_alloc_failed += (npages - i); 382 goto out_4k; 383 } 384 385 goto retry; 386 } 387 MLX5_ARRAY_SET64(manage_pages_in, in, pas, i, addr); 388 } 389 390 MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES); 391 MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_GIVE); 392 MLX5_SET(manage_pages_in, in, function_id, func_id); 393 MLX5_SET(manage_pages_in, in, input_num_entries, npages); 394 MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function); 395 396 err = mlx5_cmd_do(dev, in, inlen, out, sizeof(out)); 397 if (err == -EREMOTEIO) { 398 notify_fail = 0; 399 /* if triggered by FW and failed by FW ignore */ 400 if (event) { 401 err = 0; 402 goto out_dropped; 403 } 404 } 405 err = mlx5_cmd_check(dev, err, in, out); 406 if (err) { 407 mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n", 408 func_id, npages, err); 409 goto out_dropped; 410 } 411 412 func_type = func_id_to_type(dev, func_id, ec_function); 413 dev->priv.page_counters[func_type] += npages; 414 dev->priv.fw_pages += npages; 415 416 mlx5_core_dbg(dev, "npages %d, ec_function %d, func_id 0x%x, err %d\n", 417 npages, ec_function, func_id, err); 418 419 kvfree(in); 420 return 0; 421 422out_dropped: 423 dev->priv.give_pages_dropped += npages; 424out_4k: 425 for (i--; i >= 0; i--) 426 free_4k(dev, MLX5_GET64(manage_pages_in, in, pas[i]), function); 427out_free: 428 kvfree(in); 429 if (notify_fail) 430 page_notify_fail(dev, func_id, ec_function); 431 return err; 432} 433 434static void release_all_pages(struct mlx5_core_dev *dev, u16 func_id, 435 bool ec_function) 436{ 437 u32 function = get_function(func_id, ec_function); 438 struct rb_root *root; 439 struct rb_node *p; 440 int npages = 0; 441 u16 func_type; 442 443 root = xa_load(&dev->priv.page_root_xa, function); 444 if (WARN_ON_ONCE(!root)) 445 return; 446 447 p = rb_first(root); 448 while (p) { 449 struct fw_page *fwp = rb_entry(p, struct fw_page, rb_node); 450 451 p = rb_next(p); 452 npages += (MLX5_NUM_4K_IN_PAGE - fwp->free_count); 453 free_fwp(dev, fwp, fwp->free_count); 454 } 455 456 func_type = func_id_to_type(dev, func_id, ec_function); 457 dev->priv.page_counters[func_type] -= npages; 458 dev->priv.fw_pages -= npages; 459 460 mlx5_core_dbg(dev, "npages %d, ec_function %d, func_id 0x%x\n", 461 npages, ec_function, func_id); 462} 463 464static u32 fwp_fill_manage_pages_out(struct fw_page *fwp, u32 *out, u32 index, 465 u32 npages) 466{ 467 u32 pages_set = 0; 468 unsigned int n; 469 470 for_each_clear_bit(n, &fwp->bitmask, MLX5_NUM_4K_IN_PAGE) { 471 MLX5_ARRAY_SET64(manage_pages_out, out, pas, index + pages_set, 472 fwp->addr + (n * MLX5_ADAPTER_PAGE_SIZE)); 473 pages_set++; 474 475 if (!--npages) 476 break; 477 } 478 479 return pages_set; 480} 481 482static int reclaim_pages_cmd(struct mlx5_core_dev *dev, 483 u32 *in, int in_size, u32 *out, int out_size) 484{ 485 struct rb_root *root; 486 struct fw_page *fwp; 487 struct rb_node *p; 488 bool ec_function; 489 u32 func_id; 490 u32 npages; 491 u32 i = 0; 492 493 if (!mlx5_cmd_is_down(dev)) 494 return mlx5_cmd_do(dev, in, in_size, out, out_size); 495 496 /* No hard feelings, we want our pages back! */ 497 npages = MLX5_GET(manage_pages_in, in, input_num_entries); 498 func_id = MLX5_GET(manage_pages_in, in, function_id); 499 ec_function = MLX5_GET(manage_pages_in, in, embedded_cpu_function); 500 501 root = xa_load(&dev->priv.page_root_xa, get_function(func_id, ec_function)); 502 if (WARN_ON_ONCE(!root)) 503 return -EEXIST; 504 505 p = rb_first(root); 506 while (p && i < npages) { 507 fwp = rb_entry(p, struct fw_page, rb_node); 508 p = rb_next(p); 509 510 i += fwp_fill_manage_pages_out(fwp, out, i, npages - i); 511 } 512 513 MLX5_SET(manage_pages_out, out, output_num_entries, i); 514 return 0; 515} 516 517static int reclaim_pages(struct mlx5_core_dev *dev, u16 func_id, int npages, 518 int *nclaimed, bool event, bool ec_function) 519{ 520 u32 function = get_function(func_id, ec_function); 521 int outlen = MLX5_ST_SZ_BYTES(manage_pages_out); 522 u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {}; 523 int num_claimed; 524 u16 func_type; 525 u32 *out; 526 int err; 527 int i; 528 529 if (nclaimed) 530 *nclaimed = 0; 531 532 outlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]); 533 out = kvzalloc(outlen, GFP_KERNEL); 534 if (!out) 535 return -ENOMEM; 536 537 MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES); 538 MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_TAKE); 539 MLX5_SET(manage_pages_in, in, function_id, func_id); 540 MLX5_SET(manage_pages_in, in, input_num_entries, npages); 541 MLX5_SET(manage_pages_in, in, embedded_cpu_function, ec_function); 542 543 mlx5_core_dbg(dev, "func 0x%x, npages %d, outlen %d\n", 544 func_id, npages, outlen); 545 err = reclaim_pages_cmd(dev, in, sizeof(in), out, outlen); 546 if (err) { 547 npages = MLX5_GET(manage_pages_in, in, input_num_entries); 548 dev->priv.reclaim_pages_discard += npages; 549 } 550 /* if triggered by FW event and failed by FW then ignore */ 551 if (event && err == -EREMOTEIO) { 552 err = 0; 553 goto out_free; 554 } 555 556 err = mlx5_cmd_check(dev, err, in, out); 557 if (err) { 558 mlx5_core_err(dev, "failed reclaiming pages: err %d\n", err); 559 goto out_free; 560 } 561 562 num_claimed = MLX5_GET(manage_pages_out, out, output_num_entries); 563 if (num_claimed > npages) { 564 mlx5_core_warn(dev, "fw returned %d, driver asked %d => corruption\n", 565 num_claimed, npages); 566 err = -EINVAL; 567 goto out_free; 568 } 569 570 for (i = 0; i < num_claimed; i++) 571 free_4k(dev, MLX5_GET64(manage_pages_out, out, pas[i]), function); 572 573 if (nclaimed) 574 *nclaimed = num_claimed; 575 576 func_type = func_id_to_type(dev, func_id, ec_function); 577 dev->priv.page_counters[func_type] -= num_claimed; 578 dev->priv.fw_pages -= num_claimed; 579 580out_free: 581 kvfree(out); 582 return err; 583} 584 585static void pages_work_handler(struct work_struct *work) 586{ 587 struct mlx5_pages_req *req = container_of(work, struct mlx5_pages_req, work); 588 struct mlx5_core_dev *dev = req->dev; 589 int err = 0; 590 591 if (req->release_all) 592 release_all_pages(dev, req->func_id, req->ec_function); 593 else if (req->npages < 0) 594 err = reclaim_pages(dev, req->func_id, -1 * req->npages, NULL, 595 true, req->ec_function); 596 else if (req->npages > 0) 597 err = give_pages(dev, req->func_id, req->npages, 1, req->ec_function); 598 599 if (err) 600 mlx5_core_warn(dev, "%s fail %d\n", 601 req->npages < 0 ? "reclaim" : "give", err); 602 603 kfree(req); 604} 605 606enum { 607 EC_FUNCTION_MASK = 0x8000, 608 RELEASE_ALL_PAGES_MASK = 0x4000, 609}; 610 611static int req_pages_handler(struct notifier_block *nb, 612 unsigned long type, void *data) 613{ 614 struct mlx5_pages_req *req; 615 struct mlx5_core_dev *dev; 616 struct mlx5_priv *priv; 617 struct mlx5_eqe *eqe; 618 bool ec_function; 619 bool release_all; 620 u16 func_id; 621 s32 npages; 622 623 priv = mlx5_nb_cof(nb, struct mlx5_priv, pg_nb); 624 dev = container_of(priv, struct mlx5_core_dev, priv); 625 eqe = data; 626 627 func_id = be16_to_cpu(eqe->data.req_pages.func_id); 628 npages = be32_to_cpu(eqe->data.req_pages.num_pages); 629 ec_function = be16_to_cpu(eqe->data.req_pages.ec_function) & EC_FUNCTION_MASK; 630 release_all = be16_to_cpu(eqe->data.req_pages.ec_function) & 631 RELEASE_ALL_PAGES_MASK; 632 mlx5_core_dbg(dev, "page request for func 0x%x, npages %d, release_all %d\n", 633 func_id, npages, release_all); 634 req = kzalloc(sizeof(*req), GFP_ATOMIC); 635 if (!req) { 636 mlx5_core_warn(dev, "failed to allocate pages request\n"); 637 return NOTIFY_DONE; 638 } 639 640 req->dev = dev; 641 req->func_id = func_id; 642 req->npages = npages; 643 req->ec_function = ec_function; 644 req->release_all = release_all; 645 INIT_WORK(&req->work, pages_work_handler); 646 queue_work(dev->priv.pg_wq, &req->work); 647 return NOTIFY_OK; 648} 649 650int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot) 651{ 652 u16 func_id; 653 s32 npages; 654 int err; 655 656 err = mlx5_cmd_query_pages(dev, &func_id, &npages, boot); 657 if (err) 658 return err; 659 660 mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n", 661 npages, boot ? "boot" : "init", func_id); 662 663 return give_pages(dev, func_id, npages, 0, mlx5_core_is_ecpf(dev)); 664} 665 666enum { 667 MLX5_BLKS_FOR_RECLAIM_PAGES = 12 668}; 669 670static int optimal_reclaimed_pages(void) 671{ 672 struct mlx5_cmd_prot_block *block; 673 struct mlx5_cmd_layout *lay; 674 int ret; 675 676 ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) - 677 MLX5_ST_SZ_BYTES(manage_pages_out)) / 678 MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]); 679 680 return ret; 681} 682 683static int mlx5_reclaim_root_pages(struct mlx5_core_dev *dev, 684 struct rb_root *root, u32 function) 685{ 686 u64 recl_pages_to_jiffies = msecs_to_jiffies(mlx5_tout_ms(dev, RECLAIM_PAGES)); 687 unsigned long end = jiffies + recl_pages_to_jiffies; 688 689 while (!RB_EMPTY_ROOT(root)) { 690 u32 ec_function = mlx5_get_ec_function(function); 691 u32 function_id = mlx5_get_func_id(function); 692 int nclaimed; 693 int err; 694 695 err = reclaim_pages(dev, function_id, optimal_reclaimed_pages(), 696 &nclaimed, false, ec_function); 697 if (err) { 698 mlx5_core_warn(dev, "reclaim_pages err (%d) func_id=0x%x ec_func=0x%x\n", 699 err, function_id, ec_function); 700 return err; 701 } 702 703 if (nclaimed) 704 end = jiffies + recl_pages_to_jiffies; 705 706 if (time_after(jiffies, end)) { 707 mlx5_core_warn(dev, "FW did not return all pages. giving up...\n"); 708 break; 709 } 710 } 711 712 return 0; 713} 714 715int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev) 716{ 717 struct rb_root *root; 718 unsigned long id; 719 void *entry; 720 721 xa_for_each(&dev->priv.page_root_xa, id, entry) { 722 root = entry; 723 mlx5_reclaim_root_pages(dev, root, id); 724 xa_erase(&dev->priv.page_root_xa, id); 725 kfree(root); 726 } 727 728 WARN_ON(!xa_empty(&dev->priv.page_root_xa)); 729 730 WARN(dev->priv.fw_pages, 731 "FW pages counter is %d after reclaiming all pages\n", 732 dev->priv.fw_pages); 733 WARN(dev->priv.page_counters[MLX5_VF], 734 "VFs FW pages counter is %d after reclaiming all pages\n", 735 dev->priv.page_counters[MLX5_VF]); 736 WARN(dev->priv.page_counters[MLX5_HOST_PF], 737 "External host PF FW pages counter is %d after reclaiming all pages\n", 738 dev->priv.page_counters[MLX5_HOST_PF]); 739 WARN(dev->priv.page_counters[MLX5_EC_VF], 740 "EC VFs FW pages counter is %d after reclaiming all pages\n", 741 dev->priv.page_counters[MLX5_EC_VF]); 742 743 return 0; 744} 745 746int mlx5_pagealloc_init(struct mlx5_core_dev *dev) 747{ 748 INIT_LIST_HEAD(&dev->priv.free_list); 749 dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator"); 750 if (!dev->priv.pg_wq) 751 return -ENOMEM; 752 753 xa_init(&dev->priv.page_root_xa); 754 mlx5_pages_debugfs_init(dev); 755 756 return 0; 757} 758 759void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev) 760{ 761 mlx5_pages_debugfs_cleanup(dev); 762 xa_destroy(&dev->priv.page_root_xa); 763 destroy_workqueue(dev->priv.pg_wq); 764} 765 766void mlx5_pagealloc_start(struct mlx5_core_dev *dev) 767{ 768 MLX5_NB_INIT(&dev->priv.pg_nb, req_pages_handler, PAGE_REQUEST); 769 mlx5_eq_notifier_register(dev, &dev->priv.pg_nb); 770} 771 772void mlx5_pagealloc_stop(struct mlx5_core_dev *dev) 773{ 774 mlx5_eq_notifier_unregister(dev, &dev->priv.pg_nb); 775 flush_workqueue(dev->priv.pg_wq); 776} 777 778int mlx5_wait_for_pages(struct mlx5_core_dev *dev, int *pages) 779{ 780 u64 recl_vf_pages_to_jiffies = msecs_to_jiffies(mlx5_tout_ms(dev, RECLAIM_VFS_PAGES)); 781 unsigned long end = jiffies + recl_vf_pages_to_jiffies; 782 int prev_pages = *pages; 783 784 /* In case of internal error we will free the pages manually later */ 785 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) { 786 mlx5_core_warn(dev, "Skipping wait for vf pages stage"); 787 return 0; 788 } 789 790 mlx5_core_dbg(dev, "Waiting for %d pages\n", prev_pages); 791 while (*pages) { 792 if (time_after(jiffies, end)) { 793 mlx5_core_warn(dev, "aborting while there are %d pending pages\n", *pages); 794 return -ETIMEDOUT; 795 } 796 if (*pages < prev_pages) { 797 end = jiffies + recl_vf_pages_to_jiffies; 798 prev_pages = *pages; 799 } 800 msleep(50); 801 } 802 803 mlx5_core_dbg(dev, "All pages received\n"); 804 return 0; 805} 806