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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 two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * 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 = 246};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 else86 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 else148 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};610 611/* This limit is based on the capability of the firmware as it cannot release612 * more than 50000 back to the host in one go.613 */614#define MAX_RECLAIM_NPAGES (-50000)615 616static int req_pages_handler(struct notifier_block *nb,617 unsigned long type, void *data)618{619 struct mlx5_pages_req *req;620 struct mlx5_core_dev *dev;621 struct mlx5_priv *priv;622 struct mlx5_eqe *eqe;623 bool ec_function;624 bool release_all;625 u16 func_id;626 s32 npages;627 628 priv = mlx5_nb_cof(nb, struct mlx5_priv, pg_nb);629 dev = container_of(priv, struct mlx5_core_dev, priv);630 eqe = data;631 632 func_id = be16_to_cpu(eqe->data.req_pages.func_id);633 npages = be32_to_cpu(eqe->data.req_pages.num_pages);634 ec_function = be16_to_cpu(eqe->data.req_pages.ec_function) & EC_FUNCTION_MASK;635 release_all = be16_to_cpu(eqe->data.req_pages.ec_function) &636 RELEASE_ALL_PAGES_MASK;637 mlx5_core_dbg(dev, "page request for func 0x%x, npages %d, release_all %d\n",638 func_id, npages, release_all);639 req = kzalloc(sizeof(*req), GFP_ATOMIC);640 if (!req) {641 mlx5_core_warn(dev, "failed to allocate pages request\n");642 return NOTIFY_DONE;643 }644 645 req->dev = dev;646 req->func_id = func_id;647 648 /* npages > 0 means HCA asking host to allocate/give pages,649 * npages < 0 means HCA asking host to reclaim back the pages allocated.650 * Here we are restricting the maximum number of pages that can be651 * reclaimed to be MAX_RECLAIM_NPAGES. Note that MAX_RECLAIM_NPAGES is652 * a negative value.653 * Since MAX_RECLAIM is negative, we are using max() to restrict654 * req->npages (and not min ()).655 */656 req->npages = max_t(s32, npages, MAX_RECLAIM_NPAGES);657 req->ec_function = ec_function;658 req->release_all = release_all;659 INIT_WORK(&req->work, pages_work_handler);660 queue_work(dev->priv.pg_wq, &req->work);661 return NOTIFY_OK;662}663 664int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)665{666 u16 func_id;667 s32 npages;668 int err;669 670 err = mlx5_cmd_query_pages(dev, &func_id, &npages, boot);671 if (err)672 return err;673 674 mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n",675 npages, boot ? "boot" : "init", func_id);676 677 if (!npages)678 return 0;679 680 return give_pages(dev, func_id, npages, 0, mlx5_core_is_ecpf(dev));681}682 683enum {684 MLX5_BLKS_FOR_RECLAIM_PAGES = 12685};686 687static int optimal_reclaimed_pages(void)688{689 struct mlx5_cmd_prot_block *block;690 struct mlx5_cmd_layout *lay;691 int ret;692 693 ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -694 MLX5_ST_SZ_BYTES(manage_pages_out)) /695 MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);696 697 return ret;698}699 700static int mlx5_reclaim_root_pages(struct mlx5_core_dev *dev,701 struct rb_root *root, u32 function)702{703 u64 recl_pages_to_jiffies = msecs_to_jiffies(mlx5_tout_ms(dev, RECLAIM_PAGES));704 unsigned long end = jiffies + recl_pages_to_jiffies;705 706 while (!RB_EMPTY_ROOT(root)) {707 u32 ec_function = mlx5_get_ec_function(function);708 u32 function_id = mlx5_get_func_id(function);709 int nclaimed;710 int err;711 712 err = reclaim_pages(dev, function_id, optimal_reclaimed_pages(),713 &nclaimed, false, ec_function);714 if (err) {715 mlx5_core_warn(dev, "reclaim_pages err (%d) func_id=0x%x ec_func=0x%x\n",716 err, function_id, ec_function);717 return err;718 }719 720 if (nclaimed)721 end = jiffies + recl_pages_to_jiffies;722 723 if (time_after(jiffies, end)) {724 mlx5_core_warn(dev, "FW did not return all pages. giving up...\n");725 break;726 }727 }728 729 return 0;730}731 732int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)733{734 struct rb_root *root;735 unsigned long id;736 void *entry;737 738 xa_for_each(&dev->priv.page_root_xa, id, entry) {739 root = entry;740 mlx5_reclaim_root_pages(dev, root, id);741 xa_erase(&dev->priv.page_root_xa, id);742 kfree(root);743 }744 745 WARN_ON(!xa_empty(&dev->priv.page_root_xa));746 747 WARN(dev->priv.fw_pages,748 "FW pages counter is %d after reclaiming all pages\n",749 dev->priv.fw_pages);750 WARN(dev->priv.page_counters[MLX5_VF],751 "VFs FW pages counter is %d after reclaiming all pages\n",752 dev->priv.page_counters[MLX5_VF]);753 WARN(dev->priv.page_counters[MLX5_HOST_PF],754 "External host PF FW pages counter is %d after reclaiming all pages\n",755 dev->priv.page_counters[MLX5_HOST_PF]);756 WARN(dev->priv.page_counters[MLX5_EC_VF],757 "EC VFs FW pages counter is %d after reclaiming all pages\n",758 dev->priv.page_counters[MLX5_EC_VF]);759 760 return 0;761}762 763int mlx5_pagealloc_init(struct mlx5_core_dev *dev)764{765 INIT_LIST_HEAD(&dev->priv.free_list);766 dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator");767 if (!dev->priv.pg_wq)768 return -ENOMEM;769 770 xa_init(&dev->priv.page_root_xa);771 mlx5_pages_debugfs_init(dev);772 773 return 0;774}775 776void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev)777{778 mlx5_pages_debugfs_cleanup(dev);779 xa_destroy(&dev->priv.page_root_xa);780 destroy_workqueue(dev->priv.pg_wq);781}782 783void mlx5_pagealloc_start(struct mlx5_core_dev *dev)784{785 MLX5_NB_INIT(&dev->priv.pg_nb, req_pages_handler, PAGE_REQUEST);786 mlx5_eq_notifier_register(dev, &dev->priv.pg_nb);787}788 789void mlx5_pagealloc_stop(struct mlx5_core_dev *dev)790{791 mlx5_eq_notifier_unregister(dev, &dev->priv.pg_nb);792 flush_workqueue(dev->priv.pg_wq);793}794 795int mlx5_wait_for_pages(struct mlx5_core_dev *dev, int *pages)796{797 u64 recl_vf_pages_to_jiffies = msecs_to_jiffies(mlx5_tout_ms(dev, RECLAIM_VFS_PAGES));798 unsigned long end = jiffies + recl_vf_pages_to_jiffies;799 int prev_pages = *pages;800 801 /* In case of internal error we will free the pages manually later */802 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {803 mlx5_core_warn(dev, "Skipping wait for vf pages stage");804 return 0;805 }806 807 mlx5_core_dbg(dev, "Waiting for %d pages\n", prev_pages);808 while (*pages) {809 if (time_after(jiffies, end)) {810 mlx5_core_warn(dev, "aborting while there are %d pending pages\n", *pages);811 return -ETIMEDOUT;812 }813 if (*pages < prev_pages) {814 end = jiffies + recl_vf_pages_to_jiffies;815 prev_pages = *pages;816 }817 msleep(50);818 }819 820 mlx5_core_dbg(dev, "All pages received\n");821 return 0;822}823