2 * Copyright (c) 2016 Hisilicon Limited.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/vmalloc.h>
35 #include <rdma/ib_umem.h>
36 #include "hns_roce_device.h"
37 #include "hns_roce_cmd.h"
38 #include "hns_roce_hem.h"
40 static u32 hw_index_to_key(int ind)
42 return ((u32)ind >> 24) | ((u32)ind << 8);
45 unsigned long key_to_hw_index(u32 key)
47 return (key << 24) | (key >> 8);
50 static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
52 struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
53 struct ib_device *ibdev = &hr_dev->ib_dev;
57 /* Allocate a key for mr from mr_table */
58 id = ida_alloc_range(&mtpt_ida->ida, mtpt_ida->min, mtpt_ida->max,
61 ibdev_err(ibdev, "failed to alloc id for MR key, id(%d)\n", id);
65 mr->key = hw_index_to_key(id); /* MR key */
67 err = hns_roce_table_get(hr_dev, &hr_dev->mr_table.mtpt_table,
70 ibdev_err(ibdev, "failed to alloc mtpt, ret = %d.\n", err);
76 ida_free(&mtpt_ida->ida, id);
80 static void free_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
82 unsigned long obj = key_to_hw_index(mr->key);
84 hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table, obj);
85 ida_free(&hr_dev->mr_table.mtpt_ida.ida, (int)obj);
88 static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
89 struct ib_udata *udata, u64 start)
91 struct ib_device *ibdev = &hr_dev->ib_dev;
92 bool is_fast = mr->type == MR_TYPE_FRMR;
93 struct hns_roce_buf_attr buf_attr = {};
96 mr->pbl_hop_num = is_fast ? 1 : hr_dev->caps.pbl_hop_num;
97 buf_attr.page_shift = is_fast ? PAGE_SHIFT :
98 hr_dev->caps.pbl_buf_pg_sz + PAGE_SHIFT;
99 buf_attr.region[0].size = mr->size;
100 buf_attr.region[0].hopnum = mr->pbl_hop_num;
101 buf_attr.region_count = 1;
102 buf_attr.user_access = mr->access;
103 /* fast MR's buffer is alloced before mapping, not at creation */
104 buf_attr.mtt_only = is_fast;
106 err = hns_roce_mtr_create(hr_dev, &mr->pbl_mtr, &buf_attr,
107 hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT,
110 ibdev_err(ibdev, "failed to alloc pbl mtr, ret = %d.\n", err);
112 mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count;
117 static void free_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
119 hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr);
122 static void hns_roce_mr_free(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
124 struct ib_device *ibdev = &hr_dev->ib_dev;
128 ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
129 key_to_hw_index(mr->key) &
130 (hr_dev->caps.num_mtpts - 1));
132 ibdev_warn(ibdev, "failed to destroy mpt, ret = %d.\n",
136 free_mr_pbl(hr_dev, mr);
137 free_mr_key(hr_dev, mr);
140 static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev,
141 struct hns_roce_mr *mr)
143 unsigned long mtpt_idx = key_to_hw_index(mr->key);
144 struct hns_roce_cmd_mailbox *mailbox;
145 struct device *dev = hr_dev->dev;
148 /* Allocate mailbox memory */
149 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
151 return PTR_ERR(mailbox);
153 if (mr->type != MR_TYPE_FRMR)
154 ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr);
156 ret = hr_dev->hw->frmr_write_mtpt(hr_dev, mailbox->buf, mr);
158 dev_err(dev, "failed to write mtpt, ret = %d.\n", ret);
162 ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
163 mtpt_idx & (hr_dev->caps.num_mtpts - 1));
165 dev_err(dev, "failed to create mpt, ret = %d.\n", ret);
172 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
177 void hns_roce_init_mr_table(struct hns_roce_dev *hr_dev)
179 struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
181 ida_init(&mtpt_ida->ida);
182 mtpt_ida->max = hr_dev->caps.num_mtpts - 1;
183 mtpt_ida->min = hr_dev->caps.reserved_mrws;
186 struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc)
188 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
189 struct hns_roce_mr *mr;
192 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
194 return ERR_PTR(-ENOMEM);
196 mr->type = MR_TYPE_DMA;
197 mr->pd = to_hr_pd(pd)->pdn;
200 /* Allocate memory region key */
201 hns_roce_hem_list_init(&mr->pbl_mtr.hem_list);
202 ret = alloc_mr_key(hr_dev, mr);
206 ret = hns_roce_mr_enable(hr_dev, mr);
210 mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
214 free_mr_key(hr_dev, mr);
221 struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
222 u64 virt_addr, int access_flags,
223 struct ib_udata *udata)
225 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
226 struct hns_roce_mr *mr;
229 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
231 return ERR_PTR(-ENOMEM);
233 mr->iova = virt_addr;
235 mr->pd = to_hr_pd(pd)->pdn;
236 mr->access = access_flags;
237 mr->type = MR_TYPE_MR;
239 ret = alloc_mr_key(hr_dev, mr);
243 ret = alloc_mr_pbl(hr_dev, mr, udata, start);
247 ret = hns_roce_mr_enable(hr_dev, mr);
251 mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
256 free_mr_pbl(hr_dev, mr);
258 free_mr_key(hr_dev, mr);
264 struct ib_mr *hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start,
265 u64 length, u64 virt_addr,
266 int mr_access_flags, struct ib_pd *pd,
267 struct ib_udata *udata)
269 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
270 struct ib_device *ib_dev = &hr_dev->ib_dev;
271 struct hns_roce_mr *mr = to_hr_mr(ibmr);
272 struct hns_roce_cmd_mailbox *mailbox;
273 unsigned long mtpt_idx;
277 return ERR_PTR(-EINVAL);
279 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
281 return ERR_CAST(mailbox);
283 mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1);
285 ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, HNS_ROCE_CMD_QUERY_MPT,
290 ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
293 ibdev_warn(ib_dev, "failed to destroy MPT, ret = %d.\n", ret);
296 mr->iova = virt_addr;
299 if (flags & IB_MR_REREG_PD)
300 mr->pd = to_hr_pd(pd)->pdn;
302 if (flags & IB_MR_REREG_ACCESS)
303 mr->access = mr_access_flags;
305 if (flags & IB_MR_REREG_TRANS) {
306 free_mr_pbl(hr_dev, mr);
307 ret = alloc_mr_pbl(hr_dev, mr, udata, start);
309 ibdev_err(ib_dev, "failed to alloc mr PBL, ret = %d.\n",
315 ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, mailbox->buf);
317 ibdev_err(ib_dev, "failed to write mtpt, ret = %d.\n", ret);
321 ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
324 ibdev_err(ib_dev, "failed to create MPT, ret = %d.\n", ret);
331 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
338 int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
340 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
341 struct hns_roce_mr *mr = to_hr_mr(ibmr);
343 if (hr_dev->hw->dereg_mr)
344 hr_dev->hw->dereg_mr(hr_dev);
346 hns_roce_mr_free(hr_dev, mr);
352 struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
355 struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
356 struct device *dev = hr_dev->dev;
357 struct hns_roce_mr *mr;
360 if (mr_type != IB_MR_TYPE_MEM_REG)
361 return ERR_PTR(-EINVAL);
363 if (max_num_sg > HNS_ROCE_FRMR_MAX_PA) {
364 dev_err(dev, "max_num_sg larger than %d\n",
365 HNS_ROCE_FRMR_MAX_PA);
366 return ERR_PTR(-EINVAL);
369 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
371 return ERR_PTR(-ENOMEM);
373 mr->type = MR_TYPE_FRMR;
374 mr->pd = to_hr_pd(pd)->pdn;
375 mr->size = max_num_sg * (1 << PAGE_SHIFT);
377 /* Allocate memory region key */
378 ret = alloc_mr_key(hr_dev, mr);
382 ret = alloc_mr_pbl(hr_dev, mr, NULL, 0);
386 ret = hns_roce_mr_enable(hr_dev, mr);
390 mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
391 mr->ibmr.length = mr->size;
396 free_mr_pbl(hr_dev, mr);
398 free_mr_key(hr_dev, mr);
404 static int hns_roce_set_page(struct ib_mr *ibmr, u64 addr)
406 struct hns_roce_mr *mr = to_hr_mr(ibmr);
408 if (likely(mr->npages < mr->pbl_mtr.hem_cfg.buf_pg_count)) {
409 mr->page_list[mr->npages++] = addr;
416 int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
417 unsigned int *sg_offset)
419 struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
420 struct ib_device *ibdev = &hr_dev->ib_dev;
421 struct hns_roce_mr *mr = to_hr_mr(ibmr);
422 struct hns_roce_mtr *mtr = &mr->pbl_mtr;
426 mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count,
427 sizeof(dma_addr_t), GFP_KERNEL);
431 ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page);
433 ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n",
434 mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret);
438 mtr->hem_cfg.region[0].offset = 0;
439 mtr->hem_cfg.region[0].count = mr->npages;
440 mtr->hem_cfg.region[0].hopnum = mr->pbl_hop_num;
441 mtr->hem_cfg.region_count = 1;
442 ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages);
444 ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret);
447 mr->pbl_mtr.hem_cfg.buf_pg_shift = (u32)ilog2(ibmr->page_size);
452 kvfree(mr->page_list);
453 mr->page_list = NULL;
458 static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,
459 struct hns_roce_mw *mw)
461 struct device *dev = hr_dev->dev;
465 ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
466 key_to_hw_index(mw->rkey) &
467 (hr_dev->caps.num_mtpts - 1));
469 dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret);
471 hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table,
472 key_to_hw_index(mw->rkey));
475 ida_free(&hr_dev->mr_table.mtpt_ida.ida,
476 (int)key_to_hw_index(mw->rkey));
479 static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev,
480 struct hns_roce_mw *mw)
482 struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
483 struct hns_roce_cmd_mailbox *mailbox;
484 struct device *dev = hr_dev->dev;
485 unsigned long mtpt_idx = key_to_hw_index(mw->rkey);
488 /* prepare HEM entry memory */
489 ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx);
493 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
494 if (IS_ERR(mailbox)) {
495 ret = PTR_ERR(mailbox);
499 ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw);
501 dev_err(dev, "MW write mtpt fail!\n");
505 ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
506 mtpt_idx & (hr_dev->caps.num_mtpts - 1));
508 dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret);
514 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
519 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
522 hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx);
527 int hns_roce_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata)
529 struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
530 struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
531 struct ib_device *ibdev = &hr_dev->ib_dev;
532 struct hns_roce_mw *mw = to_hr_mw(ibmw);
536 /* Allocate a key for mw from mr_table */
537 id = ida_alloc_range(&mtpt_ida->ida, mtpt_ida->min, mtpt_ida->max,
540 ibdev_err(ibdev, "failed to alloc id for MW key, id(%d)\n", id);
544 mw->rkey = hw_index_to_key(id);
546 ibmw->rkey = mw->rkey;
547 mw->pdn = to_hr_pd(ibmw->pd)->pdn;
548 mw->pbl_hop_num = hr_dev->caps.pbl_hop_num;
549 mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
550 mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
552 ret = hns_roce_mw_enable(hr_dev, mw);
559 hns_roce_mw_free(hr_dev, mw);
563 int hns_roce_dealloc_mw(struct ib_mw *ibmw)
565 struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
566 struct hns_roce_mw *mw = to_hr_mw(ibmw);
568 hns_roce_mw_free(hr_dev, mw);
572 static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
573 struct hns_roce_buf_region *region, dma_addr_t *pages,
582 offset = region->offset;
583 end = offset + region->count;
585 while (offset < end && npage < max_count) {
587 mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
592 for (i = 0; i < count && npage < max_count; i++) {
595 mtts[i] = cpu_to_le64(addr);
604 static inline bool mtr_has_mtt(struct hns_roce_buf_attr *attr)
608 for (i = 0; i < attr->region_count; i++)
609 if (attr->region[i].hopnum != HNS_ROCE_HOP_NUM_0 &&
610 attr->region[i].hopnum > 0)
613 /* because the mtr only one root base address, when hopnum is 0 means
614 * root base address equals the first buffer address, thus all alloced
615 * memory must in a continuous space accessed by direct mode.
620 static inline size_t mtr_bufs_size(struct hns_roce_buf_attr *attr)
625 for (i = 0; i < attr->region_count; i++)
626 size += attr->region[i].size;
632 * check the given pages in continuous address space
633 * Returns 0 on success, or the error page num.
635 static inline int mtr_check_direct_pages(dma_addr_t *pages, int page_count,
636 unsigned int page_shift)
638 size_t page_size = 1 << page_shift;
641 for (i = 1; i < page_count; i++)
642 if (pages[i] - pages[i - 1] != page_size)
648 static void mtr_free_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
650 /* release user buffers */
652 ib_umem_release(mtr->umem);
656 /* release kernel buffers */
658 hns_roce_buf_free(hr_dev, mtr->kmem);
663 static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
664 struct hns_roce_buf_attr *buf_attr,
665 struct ib_udata *udata, unsigned long user_addr)
667 struct ib_device *ibdev = &hr_dev->ib_dev;
670 total_size = mtr_bufs_size(buf_attr);
674 mtr->umem = ib_umem_get(ibdev, user_addr, total_size,
675 buf_attr->user_access);
676 if (IS_ERR_OR_NULL(mtr->umem)) {
677 ibdev_err(ibdev, "failed to get umem, ret = %ld.\n",
683 mtr->kmem = hns_roce_buf_alloc(hr_dev, total_size,
684 buf_attr->page_shift,
685 mtr->hem_cfg.is_direct ?
686 HNS_ROCE_BUF_DIRECT : 0);
687 if (IS_ERR(mtr->kmem)) {
688 ibdev_err(ibdev, "failed to alloc kmem, ret = %ld.\n",
690 return PTR_ERR(mtr->kmem);
697 static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
698 int page_count, unsigned int page_shift)
700 struct ib_device *ibdev = &hr_dev->ib_dev;
705 /* alloc a tmp array to store buffer's dma address */
706 pages = kvcalloc(page_count, sizeof(dma_addr_t), GFP_KERNEL);
711 npage = hns_roce_get_umem_bufs(hr_dev, pages, page_count,
712 mtr->umem, page_shift);
714 npage = hns_roce_get_kmem_bufs(hr_dev, pages, page_count,
715 mtr->kmem, page_shift);
717 if (npage != page_count) {
718 ibdev_err(ibdev, "failed to get mtr page %d != %d.\n", npage,
724 if (mtr->hem_cfg.is_direct && npage > 1) {
725 ret = mtr_check_direct_pages(pages, npage, page_shift);
727 ibdev_err(ibdev, "failed to check %s page: %d / %d.\n",
728 mtr->umem ? "umtr" : "kmtr", ret, npage);
734 ret = hns_roce_mtr_map(hr_dev, mtr, pages, page_count);
736 ibdev_err(ibdev, "failed to map mtr pages, ret = %d.\n", ret);
744 int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
745 dma_addr_t *pages, unsigned int page_cnt)
747 struct ib_device *ibdev = &hr_dev->ib_dev;
748 struct hns_roce_buf_region *r;
749 unsigned int i, mapped_cnt;
753 * Only use the first page address as root ba when hopnum is 0, this
754 * is because the addresses of all pages are consecutive in this case.
756 if (mtr->hem_cfg.is_direct) {
757 mtr->hem_cfg.root_ba = pages[0];
761 for (i = 0, mapped_cnt = 0; i < mtr->hem_cfg.region_count &&
762 mapped_cnt < page_cnt; i++) {
763 r = &mtr->hem_cfg.region[i];
764 /* if hopnum is 0, no need to map pages in this region */
766 mapped_cnt += r->count;
770 if (r->offset + r->count > page_cnt) {
773 "failed to check mtr%u count %u + %u > %u.\n",
774 i, r->offset, r->count, page_cnt);
778 ret = mtr_map_region(hr_dev, mtr, r, &pages[r->offset],
779 page_cnt - mapped_cnt);
782 "failed to map mtr%u offset %u, ret = %d.\n",
790 if (mapped_cnt < page_cnt) {
792 ibdev_err(ibdev, "failed to map mtr pages count: %u < %u.\n",
793 mapped_cnt, page_cnt);
799 int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
800 u32 offset, u64 *mtt_buf, int mtt_max, u64 *base_addr)
802 struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
810 if (!mtt_buf || mtt_max < 1)
813 /* no mtt memory in direct mode, so just return the buffer address */
814 if (cfg->is_direct) {
815 start_index = offset >> HNS_HW_PAGE_SHIFT;
816 for (mtt_count = 0; mtt_count < cfg->region_count &&
817 total < mtt_max; mtt_count++) {
818 npage = cfg->region[mtt_count].offset;
819 if (npage < start_index)
822 addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT);
823 mtt_buf[total] = addr;
831 start_index = offset >> cfg->buf_pg_shift;
835 mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
838 if (!mtts || !mtt_count)
841 npage = min(mtt_count, left);
843 for (mtt_count = 0; mtt_count < npage; mtt_count++)
844 mtt_buf[total++] = le64_to_cpu(mtts[mtt_count]);
849 *base_addr = cfg->root_ba;
854 static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev,
855 struct hns_roce_buf_attr *attr,
856 struct hns_roce_hem_cfg *cfg,
857 unsigned int *buf_page_shift, u64 unalinged_size)
859 struct hns_roce_buf_region *r;
860 u64 first_region_padding;
861 int page_cnt, region_cnt;
862 unsigned int page_shift;
865 /* If mtt is disabled, all pages must be within a continuous range */
866 cfg->is_direct = !mtr_has_mtt(attr);
867 buf_size = mtr_bufs_size(attr);
868 if (cfg->is_direct) {
869 /* When HEM buffer uses 0-level addressing, the page size is
870 * equal to the whole buffer size, and we split the buffer into
871 * small pages which is used to check whether the adjacent
872 * units are in the continuous space and its size is fixed to
873 * 4K based on hns ROCEE's requirement.
875 page_shift = HNS_HW_PAGE_SHIFT;
877 /* The ROCEE requires the page size to be 4K * 2 ^ N. */
878 cfg->buf_pg_count = 1;
879 cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT +
880 order_base_2(DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE));
881 first_region_padding = 0;
883 page_shift = attr->page_shift;
884 cfg->buf_pg_count = DIV_ROUND_UP(buf_size + unalinged_size,
886 cfg->buf_pg_shift = page_shift;
887 first_region_padding = unalinged_size;
890 /* Convert buffer size to page index and page count for each region and
891 * the buffer's offset needs to be appended to the first region.
893 for (page_cnt = 0, region_cnt = 0; region_cnt < attr->region_count &&
894 region_cnt < ARRAY_SIZE(cfg->region); region_cnt++) {
895 r = &cfg->region[region_cnt];
896 r->offset = page_cnt;
897 buf_size = hr_hw_page_align(attr->region[region_cnt].size +
898 first_region_padding);
899 r->count = DIV_ROUND_UP(buf_size, 1 << page_shift);
900 first_region_padding = 0;
901 page_cnt += r->count;
902 r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum,
906 cfg->region_count = region_cnt;
907 *buf_page_shift = page_shift;
912 static int mtr_alloc_mtt(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
913 unsigned int ba_page_shift)
915 struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
918 hns_roce_hem_list_init(&mtr->hem_list);
919 if (!cfg->is_direct) {
920 ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list,
921 cfg->region, cfg->region_count,
925 cfg->root_ba = mtr->hem_list.root_ba;
926 cfg->ba_pg_shift = ba_page_shift;
928 cfg->ba_pg_shift = cfg->buf_pg_shift;
934 static void mtr_free_mtt(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
936 hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
940 * hns_roce_mtr_create - Create hns memory translate region.
942 * @hr_dev: RoCE device struct pointer
943 * @mtr: memory translate region
944 * @buf_attr: buffer attribute for creating mtr
945 * @ba_page_shift: page shift for multi-hop base address table
946 * @udata: user space context, if it's NULL, means kernel space
947 * @user_addr: userspace virtual address to start at
949 int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
950 struct hns_roce_buf_attr *buf_attr,
951 unsigned int ba_page_shift, struct ib_udata *udata,
952 unsigned long user_addr)
954 struct ib_device *ibdev = &hr_dev->ib_dev;
955 unsigned int buf_page_shift = 0;
959 buf_page_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, &mtr->hem_cfg,
961 udata ? user_addr & ~PAGE_MASK : 0);
962 if (buf_page_cnt < 1 || buf_page_shift < HNS_HW_PAGE_SHIFT) {
963 ibdev_err(ibdev, "failed to init mtr cfg, count %d shift %u.\n",
964 buf_page_cnt, buf_page_shift);
968 ret = mtr_alloc_mtt(hr_dev, mtr, ba_page_shift);
970 ibdev_err(ibdev, "failed to alloc mtr mtt, ret = %d.\n", ret);
974 /* The caller has its own buffer list and invokes the hns_roce_mtr_map()
975 * to finish the MTT configuration.
977 if (buf_attr->mtt_only) {
983 ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, udata, user_addr);
985 ibdev_err(ibdev, "failed to alloc mtr bufs, ret = %d.\n", ret);
989 /* Write buffer's dma address to MTT */
990 ret = mtr_map_bufs(hr_dev, mtr, buf_page_cnt, buf_page_shift);
992 ibdev_err(ibdev, "failed to map mtr bufs, ret = %d.\n", ret);
996 mtr_free_bufs(hr_dev, mtr);
998 mtr_free_mtt(hr_dev, mtr);
1002 void hns_roce_mtr_destroy(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
1004 /* release multi-hop addressing resource */
1005 hns_roce_hem_list_release(hr_dev, &mtr->hem_list);
1008 mtr_free_bufs(hr_dev, mtr);