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- /*
- * Copyright (c) 2016 Hisilicon Limited.
- * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
- #include <linux/platform_device.h>
- #include <linux/vmalloc.h>
- #include <rdma/ib_umem.h>
- #include "hns_roce_device.h"
- #include "hns_roce_cmd.h"
- #include "hns_roce_hem.h"
- static u32 hw_index_to_key(unsigned long ind)
- {
- return (u32)(ind >> 24) | (ind << 8);
- }
- unsigned long key_to_hw_index(u32 key)
- {
- return (key << 24) | (key >> 8);
- }
- EXPORT_SYMBOL_GPL(key_to_hw_index);
- static int hns_roce_sw2hw_mpt(struct hns_roce_dev *hr_dev,
- struct hns_roce_cmd_mailbox *mailbox,
- unsigned long mpt_index)
- {
- return hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, mpt_index, 0,
- HNS_ROCE_CMD_SW2HW_MPT,
- HNS_ROCE_CMD_TIMEOUT_MSECS);
- }
- int hns_roce_hw2sw_mpt(struct hns_roce_dev *hr_dev,
- struct hns_roce_cmd_mailbox *mailbox,
- unsigned long mpt_index)
- {
- return hns_roce_cmd_mbox(hr_dev, 0, mailbox ? mailbox->dma : 0,
- mpt_index, !mailbox, HNS_ROCE_CMD_HW2SW_MPT,
- HNS_ROCE_CMD_TIMEOUT_MSECS);
- }
- EXPORT_SYMBOL_GPL(hns_roce_hw2sw_mpt);
- static int hns_roce_buddy_alloc(struct hns_roce_buddy *buddy, int order,
- unsigned long *seg)
- {
- int o;
- u32 m;
- spin_lock(&buddy->lock);
- for (o = order; o <= buddy->max_order; ++o) {
- if (buddy->num_free[o]) {
- m = 1 << (buddy->max_order - o);
- *seg = find_first_bit(buddy->bits[o], m);
- if (*seg < m)
- goto found;
- }
- }
- spin_unlock(&buddy->lock);
- return -1;
- found:
- clear_bit(*seg, buddy->bits[o]);
- --buddy->num_free[o];
- while (o > order) {
- --o;
- *seg <<= 1;
- set_bit(*seg ^ 1, buddy->bits[o]);
- ++buddy->num_free[o];
- }
- spin_unlock(&buddy->lock);
- *seg <<= order;
- return 0;
- }
- static void hns_roce_buddy_free(struct hns_roce_buddy *buddy, unsigned long seg,
- int order)
- {
- seg >>= order;
- spin_lock(&buddy->lock);
- while (test_bit(seg ^ 1, buddy->bits[order])) {
- clear_bit(seg ^ 1, buddy->bits[order]);
- --buddy->num_free[order];
- seg >>= 1;
- ++order;
- }
- set_bit(seg, buddy->bits[order]);
- ++buddy->num_free[order];
- spin_unlock(&buddy->lock);
- }
- static int hns_roce_buddy_init(struct hns_roce_buddy *buddy, int max_order)
- {
- int i, s;
- buddy->max_order = max_order;
- spin_lock_init(&buddy->lock);
- buddy->bits = kcalloc(buddy->max_order + 1,
- sizeof(*buddy->bits),
- GFP_KERNEL);
- buddy->num_free = kcalloc(buddy->max_order + 1,
- sizeof(*buddy->num_free),
- GFP_KERNEL);
- if (!buddy->bits || !buddy->num_free)
- goto err_out;
- for (i = 0; i <= buddy->max_order; ++i) {
- s = BITS_TO_LONGS(1 << (buddy->max_order - i));
- buddy->bits[i] = kcalloc(s, sizeof(long), GFP_KERNEL |
- __GFP_NOWARN);
- if (!buddy->bits[i]) {
- buddy->bits[i] = vzalloc(array_size(s, sizeof(long)));
- if (!buddy->bits[i])
- goto err_out_free;
- }
- }
- set_bit(0, buddy->bits[buddy->max_order]);
- buddy->num_free[buddy->max_order] = 1;
- return 0;
- err_out_free:
- for (i = 0; i <= buddy->max_order; ++i)
- kvfree(buddy->bits[i]);
- err_out:
- kfree(buddy->bits);
- kfree(buddy->num_free);
- return -ENOMEM;
- }
- static void hns_roce_buddy_cleanup(struct hns_roce_buddy *buddy)
- {
- int i;
- for (i = 0; i <= buddy->max_order; ++i)
- kvfree(buddy->bits[i]);
- kfree(buddy->bits);
- kfree(buddy->num_free);
- }
- static int hns_roce_alloc_mtt_range(struct hns_roce_dev *hr_dev, int order,
- unsigned long *seg, u32 mtt_type)
- {
- struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
- struct hns_roce_hem_table *table;
- struct hns_roce_buddy *buddy;
- int ret;
- if (mtt_type == MTT_TYPE_WQE) {
- buddy = &mr_table->mtt_buddy;
- table = &mr_table->mtt_table;
- } else {
- buddy = &mr_table->mtt_cqe_buddy;
- table = &mr_table->mtt_cqe_table;
- }
- ret = hns_roce_buddy_alloc(buddy, order, seg);
- if (ret == -1)
- return -1;
- if (hns_roce_table_get_range(hr_dev, table, *seg,
- *seg + (1 << order) - 1)) {
- hns_roce_buddy_free(buddy, *seg, order);
- return -1;
- }
- return 0;
- }
- int hns_roce_mtt_init(struct hns_roce_dev *hr_dev, int npages, int page_shift,
- struct hns_roce_mtt *mtt)
- {
- int ret;
- int i;
- /* Page num is zero, correspond to DMA memory register */
- if (!npages) {
- mtt->order = -1;
- mtt->page_shift = HNS_ROCE_HEM_PAGE_SHIFT;
- return 0;
- }
- /* Note: if page_shift is zero, FAST memory register */
- mtt->page_shift = page_shift;
- /* Compute MTT entry necessary */
- for (mtt->order = 0, i = HNS_ROCE_MTT_ENTRY_PER_SEG; i < npages;
- i <<= 1)
- ++mtt->order;
- /* Allocate MTT entry */
- ret = hns_roce_alloc_mtt_range(hr_dev, mtt->order, &mtt->first_seg,
- mtt->mtt_type);
- if (ret == -1)
- return -ENOMEM;
- return 0;
- }
- void hns_roce_mtt_cleanup(struct hns_roce_dev *hr_dev, struct hns_roce_mtt *mtt)
- {
- struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
- if (mtt->order < 0)
- return;
- if (mtt->mtt_type == MTT_TYPE_WQE) {
- hns_roce_buddy_free(&mr_table->mtt_buddy, mtt->first_seg,
- mtt->order);
- hns_roce_table_put_range(hr_dev, &mr_table->mtt_table,
- mtt->first_seg,
- mtt->first_seg + (1 << mtt->order) - 1);
- } else {
- hns_roce_buddy_free(&mr_table->mtt_cqe_buddy, mtt->first_seg,
- mtt->order);
- hns_roce_table_put_range(hr_dev, &mr_table->mtt_cqe_table,
- mtt->first_seg,
- mtt->first_seg + (1 << mtt->order) - 1);
- }
- }
- EXPORT_SYMBOL_GPL(hns_roce_mtt_cleanup);
- static void hns_roce_loop_free(struct hns_roce_dev *hr_dev,
- struct hns_roce_mr *mr, int err_loop_index,
- int loop_i, int loop_j)
- {
- struct device *dev = hr_dev->dev;
- u32 mhop_num;
- u32 pbl_bt_sz;
- u64 bt_idx;
- int i, j;
- pbl_bt_sz = 1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT);
- mhop_num = hr_dev->caps.pbl_hop_num;
- i = loop_i;
- if (mhop_num == 3 && err_loop_index == 2) {
- for (; i >= 0; i--) {
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- for (j = 0; j < pbl_bt_sz / 8; j++) {
- if (i == loop_i && j >= loop_j)
- break;
- bt_idx = i * pbl_bt_sz / 8 + j;
- dma_free_coherent(dev, pbl_bt_sz,
- mr->pbl_bt_l2[bt_idx],
- mr->pbl_l2_dma_addr[bt_idx]);
- }
- }
- } else if (mhop_num == 3 && err_loop_index == 1) {
- for (i -= 1; i >= 0; i--) {
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- for (j = 0; j < pbl_bt_sz / 8; j++) {
- bt_idx = i * pbl_bt_sz / 8 + j;
- dma_free_coherent(dev, pbl_bt_sz,
- mr->pbl_bt_l2[bt_idx],
- mr->pbl_l2_dma_addr[bt_idx]);
- }
- }
- } else if (mhop_num == 2 && err_loop_index == 1) {
- for (i -= 1; i >= 0; i--)
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- } else {
- dev_warn(dev, "not support: mhop_num=%d, err_loop_index=%d.",
- mhop_num, err_loop_index);
- return;
- }
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l0, mr->pbl_l0_dma_addr);
- mr->pbl_bt_l0 = NULL;
- mr->pbl_l0_dma_addr = 0;
- }
- /* PBL multi hop addressing */
- static int hns_roce_mhop_alloc(struct hns_roce_dev *hr_dev, int npages,
- struct hns_roce_mr *mr)
- {
- struct device *dev = hr_dev->dev;
- int mr_alloc_done = 0;
- int npages_allocated;
- int i = 0, j = 0;
- u32 pbl_bt_sz;
- u32 mhop_num;
- u64 pbl_last_bt_num;
- u64 pbl_bt_cnt = 0;
- u64 bt_idx;
- u64 size;
- mhop_num = hr_dev->caps.pbl_hop_num;
- pbl_bt_sz = 1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT);
- pbl_last_bt_num = (npages + pbl_bt_sz / 8 - 1) / (pbl_bt_sz / 8);
- if (mhop_num == HNS_ROCE_HOP_NUM_0)
- return 0;
- /* hop_num = 1 */
- if (mhop_num == 1) {
- if (npages > pbl_bt_sz / 8) {
- dev_err(dev, "npages %d is larger than buf_pg_sz!",
- npages);
- return -EINVAL;
- }
- mr->pbl_buf = dma_alloc_coherent(dev, npages * 8,
- &(mr->pbl_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_buf)
- return -ENOMEM;
- mr->pbl_size = npages;
- mr->pbl_ba = mr->pbl_dma_addr;
- mr->pbl_hop_num = hr_dev->caps.pbl_hop_num;
- mr->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
- mr->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
- return 0;
- }
- mr->pbl_l1_dma_addr = kcalloc(pbl_bt_sz / 8,
- sizeof(*mr->pbl_l1_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_l1_dma_addr)
- return -ENOMEM;
- mr->pbl_bt_l1 = kcalloc(pbl_bt_sz / 8, sizeof(*mr->pbl_bt_l1),
- GFP_KERNEL);
- if (!mr->pbl_bt_l1)
- goto err_kcalloc_bt_l1;
- if (mhop_num == 3) {
- mr->pbl_l2_dma_addr = kcalloc(pbl_last_bt_num,
- sizeof(*mr->pbl_l2_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_l2_dma_addr)
- goto err_kcalloc_l2_dma;
- mr->pbl_bt_l2 = kcalloc(pbl_last_bt_num,
- sizeof(*mr->pbl_bt_l2),
- GFP_KERNEL);
- if (!mr->pbl_bt_l2)
- goto err_kcalloc_bt_l2;
- }
- /* alloc L0 BT */
- mr->pbl_bt_l0 = dma_alloc_coherent(dev, pbl_bt_sz,
- &(mr->pbl_l0_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_bt_l0)
- goto err_dma_alloc_l0;
- if (mhop_num == 2) {
- /* alloc L1 BT */
- for (i = 0; i < pbl_bt_sz / 8; i++) {
- if (pbl_bt_cnt + 1 < pbl_last_bt_num) {
- size = pbl_bt_sz;
- } else {
- npages_allocated = i * (pbl_bt_sz / 8);
- size = (npages - npages_allocated) * 8;
- }
- mr->pbl_bt_l1[i] = dma_alloc_coherent(dev, size,
- &(mr->pbl_l1_dma_addr[i]),
- GFP_KERNEL);
- if (!mr->pbl_bt_l1[i]) {
- hns_roce_loop_free(hr_dev, mr, 1, i, 0);
- goto err_dma_alloc_l0;
- }
- *(mr->pbl_bt_l0 + i) = mr->pbl_l1_dma_addr[i];
- pbl_bt_cnt++;
- if (pbl_bt_cnt >= pbl_last_bt_num)
- break;
- }
- } else if (mhop_num == 3) {
- /* alloc L1, L2 BT */
- for (i = 0; i < pbl_bt_sz / 8; i++) {
- mr->pbl_bt_l1[i] = dma_alloc_coherent(dev, pbl_bt_sz,
- &(mr->pbl_l1_dma_addr[i]),
- GFP_KERNEL);
- if (!mr->pbl_bt_l1[i]) {
- hns_roce_loop_free(hr_dev, mr, 1, i, 0);
- goto err_dma_alloc_l0;
- }
- *(mr->pbl_bt_l0 + i) = mr->pbl_l1_dma_addr[i];
- for (j = 0; j < pbl_bt_sz / 8; j++) {
- bt_idx = i * pbl_bt_sz / 8 + j;
- if (pbl_bt_cnt + 1 < pbl_last_bt_num) {
- size = pbl_bt_sz;
- } else {
- npages_allocated = bt_idx *
- (pbl_bt_sz / 8);
- size = (npages - npages_allocated) * 8;
- }
- mr->pbl_bt_l2[bt_idx] = dma_alloc_coherent(
- dev, size,
- &(mr->pbl_l2_dma_addr[bt_idx]),
- GFP_KERNEL);
- if (!mr->pbl_bt_l2[bt_idx]) {
- hns_roce_loop_free(hr_dev, mr, 2, i, j);
- goto err_dma_alloc_l0;
- }
- *(mr->pbl_bt_l1[i] + j) =
- mr->pbl_l2_dma_addr[bt_idx];
- pbl_bt_cnt++;
- if (pbl_bt_cnt >= pbl_last_bt_num) {
- mr_alloc_done = 1;
- break;
- }
- }
- if (mr_alloc_done)
- break;
- }
- }
- mr->l0_chunk_last_num = i + 1;
- if (mhop_num == 3)
- mr->l1_chunk_last_num = j + 1;
- mr->pbl_size = npages;
- mr->pbl_ba = mr->pbl_l0_dma_addr;
- mr->pbl_hop_num = hr_dev->caps.pbl_hop_num;
- mr->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
- mr->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
- return 0;
- err_dma_alloc_l0:
- kfree(mr->pbl_bt_l2);
- mr->pbl_bt_l2 = NULL;
- err_kcalloc_bt_l2:
- kfree(mr->pbl_l2_dma_addr);
- mr->pbl_l2_dma_addr = NULL;
- err_kcalloc_l2_dma:
- kfree(mr->pbl_bt_l1);
- mr->pbl_bt_l1 = NULL;
- err_kcalloc_bt_l1:
- kfree(mr->pbl_l1_dma_addr);
- mr->pbl_l1_dma_addr = NULL;
- return -ENOMEM;
- }
- static int hns_roce_mr_alloc(struct hns_roce_dev *hr_dev, u32 pd, u64 iova,
- u64 size, u32 access, int npages,
- struct hns_roce_mr *mr)
- {
- struct device *dev = hr_dev->dev;
- unsigned long index = 0;
- int ret = 0;
- /* Allocate a key for mr from mr_table */
- ret = hns_roce_bitmap_alloc(&hr_dev->mr_table.mtpt_bitmap, &index);
- if (ret == -1)
- return -ENOMEM;
- mr->iova = iova; /* MR va starting addr */
- mr->size = size; /* MR addr range */
- mr->pd = pd; /* MR num */
- mr->access = access; /* MR access permit */
- mr->enabled = 0; /* MR active status */
- mr->key = hw_index_to_key(index); /* MR key */
- if (size == ~0ull) {
- mr->type = MR_TYPE_DMA;
- mr->pbl_buf = NULL;
- mr->pbl_dma_addr = 0;
- /* PBL multi-hop addressing parameters */
- mr->pbl_bt_l2 = NULL;
- mr->pbl_bt_l1 = NULL;
- mr->pbl_bt_l0 = NULL;
- mr->pbl_l2_dma_addr = NULL;
- mr->pbl_l1_dma_addr = NULL;
- mr->pbl_l0_dma_addr = 0;
- } else {
- mr->type = MR_TYPE_MR;
- if (!hr_dev->caps.pbl_hop_num) {
- mr->pbl_buf = dma_alloc_coherent(dev, npages * 8,
- &(mr->pbl_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_buf)
- return -ENOMEM;
- } else {
- ret = hns_roce_mhop_alloc(hr_dev, npages, mr);
- }
- }
- return ret;
- }
- static void hns_roce_mhop_free(struct hns_roce_dev *hr_dev,
- struct hns_roce_mr *mr)
- {
- struct device *dev = hr_dev->dev;
- int npages_allocated;
- int npages;
- int i, j;
- u32 pbl_bt_sz;
- u32 mhop_num;
- u64 bt_idx;
- npages = ib_umem_page_count(mr->umem);
- pbl_bt_sz = 1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT);
- mhop_num = hr_dev->caps.pbl_hop_num;
- if (mhop_num == HNS_ROCE_HOP_NUM_0)
- return;
- /* hop_num = 1 */
- if (mhop_num == 1) {
- dma_free_coherent(dev, (unsigned int)(npages * 8),
- mr->pbl_buf, mr->pbl_dma_addr);
- return;
- }
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l0,
- mr->pbl_l0_dma_addr);
- if (mhop_num == 2) {
- for (i = 0; i < mr->l0_chunk_last_num; i++) {
- if (i == mr->l0_chunk_last_num - 1) {
- npages_allocated = i * (pbl_bt_sz / 8);
- dma_free_coherent(dev,
- (npages - npages_allocated) * 8,
- mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- break;
- }
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- }
- } else if (mhop_num == 3) {
- for (i = 0; i < mr->l0_chunk_last_num; i++) {
- dma_free_coherent(dev, pbl_bt_sz, mr->pbl_bt_l1[i],
- mr->pbl_l1_dma_addr[i]);
- for (j = 0; j < pbl_bt_sz / 8; j++) {
- bt_idx = i * (pbl_bt_sz / 8) + j;
- if ((i == mr->l0_chunk_last_num - 1)
- && j == mr->l1_chunk_last_num - 1) {
- npages_allocated = bt_idx *
- (pbl_bt_sz / 8);
- dma_free_coherent(dev,
- (npages - npages_allocated) * 8,
- mr->pbl_bt_l2[bt_idx],
- mr->pbl_l2_dma_addr[bt_idx]);
- break;
- }
- dma_free_coherent(dev, pbl_bt_sz,
- mr->pbl_bt_l2[bt_idx],
- mr->pbl_l2_dma_addr[bt_idx]);
- }
- }
- }
- kfree(mr->pbl_bt_l1);
- kfree(mr->pbl_l1_dma_addr);
- mr->pbl_bt_l1 = NULL;
- mr->pbl_l1_dma_addr = NULL;
- if (mhop_num == 3) {
- kfree(mr->pbl_bt_l2);
- kfree(mr->pbl_l2_dma_addr);
- mr->pbl_bt_l2 = NULL;
- mr->pbl_l2_dma_addr = NULL;
- }
- }
- static void hns_roce_mr_free(struct hns_roce_dev *hr_dev,
- struct hns_roce_mr *mr)
- {
- struct device *dev = hr_dev->dev;
- int npages = 0;
- int ret;
- if (mr->enabled) {
- ret = hns_roce_hw2sw_mpt(hr_dev, NULL, key_to_hw_index(mr->key)
- & (hr_dev->caps.num_mtpts - 1));
- if (ret)
- dev_warn(dev, "HW2SW_MPT failed (%d)\n", ret);
- }
- if (mr->size != ~0ULL) {
- npages = ib_umem_page_count(mr->umem);
- if (!hr_dev->caps.pbl_hop_num)
- dma_free_coherent(dev, (unsigned int)(npages * 8),
- mr->pbl_buf, mr->pbl_dma_addr);
- else
- hns_roce_mhop_free(hr_dev, mr);
- }
- if (mr->enabled)
- hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table,
- key_to_hw_index(mr->key));
- hns_roce_bitmap_free(&hr_dev->mr_table.mtpt_bitmap,
- key_to_hw_index(mr->key), BITMAP_NO_RR);
- }
- static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev,
- struct hns_roce_mr *mr)
- {
- int ret;
- unsigned long mtpt_idx = key_to_hw_index(mr->key);
- struct device *dev = hr_dev->dev;
- struct hns_roce_cmd_mailbox *mailbox;
- struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
- /* Prepare HEM entry memory */
- ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx);
- if (ret)
- return ret;
- /* Allocate mailbox memory */
- mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
- if (IS_ERR(mailbox)) {
- ret = PTR_ERR(mailbox);
- goto err_table;
- }
- ret = hr_dev->hw->write_mtpt(mailbox->buf, mr, mtpt_idx);
- if (ret) {
- dev_err(dev, "Write mtpt fail!\n");
- goto err_page;
- }
- ret = hns_roce_sw2hw_mpt(hr_dev, mailbox,
- mtpt_idx & (hr_dev->caps.num_mtpts - 1));
- if (ret) {
- dev_err(dev, "SW2HW_MPT failed (%d)\n", ret);
- goto err_page;
- }
- mr->enabled = 1;
- hns_roce_free_cmd_mailbox(hr_dev, mailbox);
- return 0;
- err_page:
- hns_roce_free_cmd_mailbox(hr_dev, mailbox);
- err_table:
- hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx);
- return ret;
- }
- static int hns_roce_write_mtt_chunk(struct hns_roce_dev *hr_dev,
- struct hns_roce_mtt *mtt, u32 start_index,
- u32 npages, u64 *page_list)
- {
- struct hns_roce_hem_table *table;
- dma_addr_t dma_handle;
- __le64 *mtts;
- u32 bt_page_size;
- u32 i;
- if (mtt->mtt_type == MTT_TYPE_WQE)
- bt_page_size = 1 << (hr_dev->caps.mtt_ba_pg_sz + PAGE_SHIFT);
- else
- bt_page_size = 1 << (hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT);
- /* All MTTs must fit in the same page */
- if (start_index / (bt_page_size / sizeof(u64)) !=
- (start_index + npages - 1) / (bt_page_size / sizeof(u64)))
- return -EINVAL;
- if (start_index & (HNS_ROCE_MTT_ENTRY_PER_SEG - 1))
- return -EINVAL;
- if (mtt->mtt_type == MTT_TYPE_WQE)
- table = &hr_dev->mr_table.mtt_table;
- else
- table = &hr_dev->mr_table.mtt_cqe_table;
- mtts = hns_roce_table_find(hr_dev, table,
- mtt->first_seg +
- start_index / HNS_ROCE_MTT_ENTRY_PER_SEG,
- &dma_handle);
- if (!mtts)
- return -ENOMEM;
- /* Save page addr, low 12 bits : 0 */
- for (i = 0; i < npages; ++i) {
- if (!hr_dev->caps.mtt_hop_num)
- mtts[i] = cpu_to_le64(page_list[i] >> PAGE_ADDR_SHIFT);
- else
- mtts[i] = cpu_to_le64(page_list[i]);
- }
- return 0;
- }
- static int hns_roce_write_mtt(struct hns_roce_dev *hr_dev,
- struct hns_roce_mtt *mtt, u32 start_index,
- u32 npages, u64 *page_list)
- {
- int chunk;
- int ret;
- u32 bt_page_size;
- if (mtt->order < 0)
- return -EINVAL;
- if (mtt->mtt_type == MTT_TYPE_WQE)
- bt_page_size = 1 << (hr_dev->caps.mtt_ba_pg_sz + PAGE_SHIFT);
- else
- bt_page_size = 1 << (hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT);
- while (npages > 0) {
- chunk = min_t(int, bt_page_size / sizeof(u64), npages);
- ret = hns_roce_write_mtt_chunk(hr_dev, mtt, start_index, chunk,
- page_list);
- if (ret)
- return ret;
- npages -= chunk;
- start_index += chunk;
- page_list += chunk;
- }
- return 0;
- }
- int hns_roce_buf_write_mtt(struct hns_roce_dev *hr_dev,
- struct hns_roce_mtt *mtt, struct hns_roce_buf *buf)
- {
- u64 *page_list;
- int ret;
- u32 i;
- page_list = kmalloc_array(buf->npages, sizeof(*page_list), GFP_KERNEL);
- if (!page_list)
- return -ENOMEM;
- for (i = 0; i < buf->npages; ++i) {
- if (buf->nbufs == 1)
- page_list[i] = buf->direct.map + (i << buf->page_shift);
- else
- page_list[i] = buf->page_list[i].map;
- }
- ret = hns_roce_write_mtt(hr_dev, mtt, 0, buf->npages, page_list);
- kfree(page_list);
- return ret;
- }
- int hns_roce_init_mr_table(struct hns_roce_dev *hr_dev)
- {
- struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
- int ret;
- ret = hns_roce_bitmap_init(&mr_table->mtpt_bitmap,
- hr_dev->caps.num_mtpts,
- hr_dev->caps.num_mtpts - 1,
- hr_dev->caps.reserved_mrws, 0);
- if (ret)
- return ret;
- ret = hns_roce_buddy_init(&mr_table->mtt_buddy,
- ilog2(hr_dev->caps.num_mtt_segs));
- if (ret)
- goto err_buddy;
- if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE)) {
- ret = hns_roce_buddy_init(&mr_table->mtt_cqe_buddy,
- ilog2(hr_dev->caps.num_cqe_segs));
- if (ret)
- goto err_buddy_cqe;
- }
- return 0;
- err_buddy_cqe:
- hns_roce_buddy_cleanup(&mr_table->mtt_buddy);
- err_buddy:
- hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap);
- return ret;
- }
- void hns_roce_cleanup_mr_table(struct hns_roce_dev *hr_dev)
- {
- struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
- hns_roce_buddy_cleanup(&mr_table->mtt_buddy);
- if (hns_roce_check_whether_mhop(hr_dev, HEM_TYPE_CQE))
- hns_roce_buddy_cleanup(&mr_table->mtt_cqe_buddy);
- hns_roce_bitmap_cleanup(&mr_table->mtpt_bitmap);
- }
- struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc)
- {
- struct hns_roce_mr *mr;
- int ret;
- mr = kmalloc(sizeof(*mr), GFP_KERNEL);
- if (mr == NULL)
- return ERR_PTR(-ENOMEM);
- /* Allocate memory region key */
- ret = hns_roce_mr_alloc(to_hr_dev(pd->device), to_hr_pd(pd)->pdn, 0,
- ~0ULL, acc, 0, mr);
- if (ret)
- goto err_free;
- ret = hns_roce_mr_enable(to_hr_dev(pd->device), mr);
- if (ret)
- goto err_mr;
- mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
- mr->umem = NULL;
- return &mr->ibmr;
- err_mr:
- hns_roce_mr_free(to_hr_dev(pd->device), mr);
- err_free:
- kfree(mr);
- return ERR_PTR(ret);
- }
- int hns_roce_ib_umem_write_mtt(struct hns_roce_dev *hr_dev,
- struct hns_roce_mtt *mtt, struct ib_umem *umem)
- {
- struct device *dev = hr_dev->dev;
- struct scatterlist *sg;
- unsigned int order;
- int i, k, entry;
- int npage = 0;
- int ret = 0;
- int len;
- u64 page_addr;
- u64 *pages;
- u32 bt_page_size;
- u32 n;
- order = mtt->mtt_type == MTT_TYPE_WQE ? hr_dev->caps.mtt_ba_pg_sz :
- hr_dev->caps.cqe_ba_pg_sz;
- bt_page_size = 1 << (order + PAGE_SHIFT);
- pages = (u64 *) __get_free_pages(GFP_KERNEL, order);
- if (!pages)
- return -ENOMEM;
- i = n = 0;
- for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
- len = sg_dma_len(sg) >> PAGE_SHIFT;
- for (k = 0; k < len; ++k) {
- page_addr =
- sg_dma_address(sg) + (k << umem->page_shift);
- if (!(npage % (1 << (mtt->page_shift - PAGE_SHIFT)))) {
- if (page_addr & ((1 << mtt->page_shift) - 1)) {
- dev_err(dev, "page_addr 0x%llx is not page_shift %d alignment!\n",
- page_addr, mtt->page_shift);
- ret = -EINVAL;
- goto out;
- }
- pages[i++] = page_addr;
- }
- npage++;
- if (i == bt_page_size / sizeof(u64)) {
- ret = hns_roce_write_mtt(hr_dev, mtt, n, i,
- pages);
- if (ret)
- goto out;
- n += i;
- i = 0;
- }
- }
- }
- if (i)
- ret = hns_roce_write_mtt(hr_dev, mtt, n, i, pages);
- out:
- free_pages((unsigned long) pages, order);
- return ret;
- }
- static int hns_roce_ib_umem_write_mr(struct hns_roce_dev *hr_dev,
- struct hns_roce_mr *mr,
- struct ib_umem *umem)
- {
- struct scatterlist *sg;
- int i = 0, j = 0, k;
- int entry;
- int len;
- u64 page_addr;
- u32 pbl_bt_sz;
- if (hr_dev->caps.pbl_hop_num == HNS_ROCE_HOP_NUM_0)
- return 0;
- pbl_bt_sz = 1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT);
- for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
- len = sg_dma_len(sg) >> PAGE_SHIFT;
- for (k = 0; k < len; ++k) {
- page_addr = sg_dma_address(sg) +
- (k << umem->page_shift);
- if (!hr_dev->caps.pbl_hop_num) {
- mr->pbl_buf[i++] = page_addr >> 12;
- } else if (hr_dev->caps.pbl_hop_num == 1) {
- mr->pbl_buf[i++] = page_addr;
- } else {
- if (hr_dev->caps.pbl_hop_num == 2)
- mr->pbl_bt_l1[i][j] = page_addr;
- else if (hr_dev->caps.pbl_hop_num == 3)
- mr->pbl_bt_l2[i][j] = page_addr;
- j++;
- if (j >= (pbl_bt_sz / 8)) {
- i++;
- j = 0;
- }
- }
- }
- }
- /* Memory barrier */
- mb();
- return 0;
- }
- struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
- u64 virt_addr, int access_flags,
- struct ib_udata *udata)
- {
- struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
- struct device *dev = hr_dev->dev;
- struct hns_roce_mr *mr;
- int bt_size;
- int ret;
- int n;
- int i;
- mr = kmalloc(sizeof(*mr), GFP_KERNEL);
- if (!mr)
- return ERR_PTR(-ENOMEM);
- mr->umem = ib_umem_get(pd->uobject->context, start, length,
- access_flags, 0);
- if (IS_ERR(mr->umem)) {
- ret = PTR_ERR(mr->umem);
- goto err_free;
- }
- n = ib_umem_page_count(mr->umem);
- if (!hr_dev->caps.pbl_hop_num) {
- if (n > HNS_ROCE_MAX_MTPT_PBL_NUM) {
- dev_err(dev,
- " MR len %lld err. MR is limited to 4G at most!\n",
- length);
- ret = -EINVAL;
- goto err_umem;
- }
- } else {
- u64 pbl_size = 1;
- bt_size = (1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT)) / 8;
- for (i = 0; i < hr_dev->caps.pbl_hop_num; i++)
- pbl_size *= bt_size;
- if (n > pbl_size) {
- dev_err(dev,
- " MR len %lld err. MR page num is limited to %lld!\n",
- length, pbl_size);
- ret = -EINVAL;
- goto err_umem;
- }
- }
- ret = hns_roce_mr_alloc(hr_dev, to_hr_pd(pd)->pdn, virt_addr, length,
- access_flags, n, mr);
- if (ret)
- goto err_umem;
- ret = hns_roce_ib_umem_write_mr(hr_dev, mr, mr->umem);
- if (ret)
- goto err_mr;
- ret = hns_roce_mr_enable(hr_dev, mr);
- if (ret)
- goto err_mr;
- mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
- return &mr->ibmr;
- err_mr:
- hns_roce_mr_free(hr_dev, mr);
- err_umem:
- ib_umem_release(mr->umem);
- err_free:
- kfree(mr);
- return ERR_PTR(ret);
- }
- int hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start, u64 length,
- u64 virt_addr, int mr_access_flags, struct ib_pd *pd,
- struct ib_udata *udata)
- {
- struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
- struct hns_roce_mr *mr = to_hr_mr(ibmr);
- struct hns_roce_cmd_mailbox *mailbox;
- struct device *dev = hr_dev->dev;
- unsigned long mtpt_idx;
- u32 pdn = 0;
- int npages;
- int ret;
- if (!mr->enabled)
- return -EINVAL;
- mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
- if (IS_ERR(mailbox))
- return PTR_ERR(mailbox);
- mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1);
- ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, mtpt_idx, 0,
- HNS_ROCE_CMD_QUERY_MPT,
- HNS_ROCE_CMD_TIMEOUT_MSECS);
- if (ret)
- goto free_cmd_mbox;
- ret = hns_roce_hw2sw_mpt(hr_dev, NULL, mtpt_idx);
- if (ret)
- dev_warn(dev, "HW2SW_MPT failed (%d)\n", ret);
- mr->enabled = 0;
- if (flags & IB_MR_REREG_PD)
- pdn = to_hr_pd(pd)->pdn;
- if (flags & IB_MR_REREG_TRANS) {
- if (mr->size != ~0ULL) {
- npages = ib_umem_page_count(mr->umem);
- if (hr_dev->caps.pbl_hop_num)
- hns_roce_mhop_free(hr_dev, mr);
- else
- dma_free_coherent(dev, npages * 8, mr->pbl_buf,
- mr->pbl_dma_addr);
- }
- ib_umem_release(mr->umem);
- mr->umem = ib_umem_get(ibmr->uobject->context, start, length,
- mr_access_flags, 0);
- if (IS_ERR(mr->umem)) {
- ret = PTR_ERR(mr->umem);
- mr->umem = NULL;
- goto free_cmd_mbox;
- }
- npages = ib_umem_page_count(mr->umem);
- if (hr_dev->caps.pbl_hop_num) {
- ret = hns_roce_mhop_alloc(hr_dev, npages, mr);
- if (ret)
- goto release_umem;
- } else {
- mr->pbl_buf = dma_alloc_coherent(dev, npages * 8,
- &(mr->pbl_dma_addr),
- GFP_KERNEL);
- if (!mr->pbl_buf) {
- ret = -ENOMEM;
- goto release_umem;
- }
- }
- }
- ret = hr_dev->hw->rereg_write_mtpt(hr_dev, mr, flags, pdn,
- mr_access_flags, virt_addr,
- length, mailbox->buf);
- if (ret) {
- if (flags & IB_MR_REREG_TRANS)
- goto release_umem;
- else
- goto free_cmd_mbox;
- }
- if (flags & IB_MR_REREG_TRANS) {
- ret = hns_roce_ib_umem_write_mr(hr_dev, mr, mr->umem);
- if (ret) {
- if (mr->size != ~0ULL) {
- npages = ib_umem_page_count(mr->umem);
- if (hr_dev->caps.pbl_hop_num)
- hns_roce_mhop_free(hr_dev, mr);
- else
- dma_free_coherent(dev, npages * 8,
- mr->pbl_buf,
- mr->pbl_dma_addr);
- }
- goto release_umem;
- }
- }
- ret = hns_roce_sw2hw_mpt(hr_dev, mailbox, mtpt_idx);
- if (ret) {
- dev_err(dev, "SW2HW_MPT failed (%d)\n", ret);
- goto release_umem;
- }
- mr->enabled = 1;
- if (flags & IB_MR_REREG_ACCESS)
- mr->access = mr_access_flags;
- hns_roce_free_cmd_mailbox(hr_dev, mailbox);
- return 0;
- release_umem:
- ib_umem_release(mr->umem);
- free_cmd_mbox:
- hns_roce_free_cmd_mailbox(hr_dev, mailbox);
- return ret;
- }
- int hns_roce_dereg_mr(struct ib_mr *ibmr)
- {
- struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
- struct hns_roce_mr *mr = to_hr_mr(ibmr);
- int ret = 0;
- if (hr_dev->hw->dereg_mr) {
- ret = hr_dev->hw->dereg_mr(hr_dev, mr);
- } else {
- hns_roce_mr_free(hr_dev, mr);
- if (mr->umem)
- ib_umem_release(mr->umem);
- kfree(mr);
- }
- return ret;
- }
|