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526 lines
14 KiB
526 lines
14 KiB
/* |
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* Copyright (c) 2016 Hisilicon Limited. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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|
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#include <linux/platform_device.h> |
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#include <rdma/ib_umem.h> |
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#include <rdma/uverbs_ioctl.h> |
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#include "hns_roce_device.h" |
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#include "hns_roce_cmd.h" |
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#include "hns_roce_hem.h" |
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#include "hns_roce_common.h" |
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|
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static u8 get_least_load_bankid_for_cq(struct hns_roce_bank *bank) |
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{ |
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u32 least_load = bank[0].inuse; |
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u8 bankid = 0; |
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u32 bankcnt; |
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u8 i; |
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for (i = 1; i < HNS_ROCE_CQ_BANK_NUM; i++) { |
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bankcnt = bank[i].inuse; |
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if (bankcnt < least_load) { |
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least_load = bankcnt; |
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bankid = i; |
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} |
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} |
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return bankid; |
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} |
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static int alloc_cqn(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) |
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{ |
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struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; |
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struct hns_roce_bank *bank; |
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u8 bankid; |
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int id; |
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mutex_lock(&cq_table->bank_mutex); |
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bankid = get_least_load_bankid_for_cq(cq_table->bank); |
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bank = &cq_table->bank[bankid]; |
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id = ida_alloc_range(&bank->ida, bank->min, bank->max, GFP_KERNEL); |
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if (id < 0) { |
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mutex_unlock(&cq_table->bank_mutex); |
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return id; |
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} |
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/* the lower 2 bits is bankid */ |
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hr_cq->cqn = (id << CQ_BANKID_SHIFT) | bankid; |
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bank->inuse++; |
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mutex_unlock(&cq_table->bank_mutex); |
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return 0; |
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} |
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static inline u8 get_cq_bankid(unsigned long cqn) |
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{ |
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/* The lower 2 bits of CQN are used to hash to different banks */ |
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return (u8)(cqn & GENMASK(1, 0)); |
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} |
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static void free_cqn(struct hns_roce_dev *hr_dev, unsigned long cqn) |
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{ |
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struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; |
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struct hns_roce_bank *bank; |
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bank = &cq_table->bank[get_cq_bankid(cqn)]; |
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ida_free(&bank->ida, cqn >> CQ_BANKID_SHIFT); |
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mutex_lock(&cq_table->bank_mutex); |
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bank->inuse--; |
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mutex_unlock(&cq_table->bank_mutex); |
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} |
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static int alloc_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) |
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{ |
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struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; |
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struct ib_device *ibdev = &hr_dev->ib_dev; |
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struct hns_roce_cmd_mailbox *mailbox; |
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u64 mtts[MTT_MIN_COUNT] = { 0 }; |
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dma_addr_t dma_handle; |
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int ret; |
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ret = hns_roce_mtr_find(hr_dev, &hr_cq->mtr, 0, mtts, ARRAY_SIZE(mtts), |
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&dma_handle); |
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if (!ret) { |
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ibdev_err(ibdev, "failed to find CQ mtr, ret = %d.\n", ret); |
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return -EINVAL; |
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} |
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/* Get CQC memory HEM(Hardware Entry Memory) table */ |
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ret = hns_roce_table_get(hr_dev, &cq_table->table, hr_cq->cqn); |
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if (ret) { |
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ibdev_err(ibdev, "failed to get CQ(0x%lx) context, ret = %d.\n", |
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hr_cq->cqn, ret); |
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goto err_out; |
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} |
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ret = xa_err(xa_store(&cq_table->array, hr_cq->cqn, hr_cq, GFP_KERNEL)); |
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if (ret) { |
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ibdev_err(ibdev, "failed to xa_store CQ, ret = %d.\n", ret); |
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goto err_put; |
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} |
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/* Allocate mailbox memory */ |
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mailbox = hns_roce_alloc_cmd_mailbox(hr_dev); |
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if (IS_ERR(mailbox)) { |
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ret = PTR_ERR(mailbox); |
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goto err_xa; |
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} |
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hr_dev->hw->write_cqc(hr_dev, hr_cq, mailbox->buf, mtts, dma_handle); |
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|
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/* Send mailbox to hw */ |
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ret = hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, hr_cq->cqn, 0, |
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HNS_ROCE_CMD_CREATE_CQC, HNS_ROCE_CMD_TIMEOUT_MSECS); |
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hns_roce_free_cmd_mailbox(hr_dev, mailbox); |
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if (ret) { |
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ibdev_err(ibdev, |
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"failed to send create cmd for CQ(0x%lx), ret = %d.\n", |
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hr_cq->cqn, ret); |
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goto err_xa; |
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} |
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hr_cq->cons_index = 0; |
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hr_cq->arm_sn = 1; |
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refcount_set(&hr_cq->refcount, 1); |
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init_completion(&hr_cq->free); |
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return 0; |
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err_xa: |
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xa_erase(&cq_table->array, hr_cq->cqn); |
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err_put: |
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hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn); |
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err_out: |
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return ret; |
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} |
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static void free_cqc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) |
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{ |
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struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; |
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struct device *dev = hr_dev->dev; |
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int ret; |
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ret = hns_roce_cmd_mbox(hr_dev, 0, 0, hr_cq->cqn, 1, |
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HNS_ROCE_CMD_DESTROY_CQC, |
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HNS_ROCE_CMD_TIMEOUT_MSECS); |
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if (ret) |
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dev_err(dev, "DESTROY_CQ failed (%d) for CQN %06lx\n", ret, |
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hr_cq->cqn); |
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xa_erase(&cq_table->array, hr_cq->cqn); |
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/* Waiting interrupt process procedure carried out */ |
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synchronize_irq(hr_dev->eq_table.eq[hr_cq->vector].irq); |
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|
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/* wait for all interrupt processed */ |
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if (refcount_dec_and_test(&hr_cq->refcount)) |
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complete(&hr_cq->free); |
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wait_for_completion(&hr_cq->free); |
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hns_roce_table_put(hr_dev, &cq_table->table, hr_cq->cqn); |
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} |
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static int alloc_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq, |
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struct ib_udata *udata, unsigned long addr) |
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{ |
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struct ib_device *ibdev = &hr_dev->ib_dev; |
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struct hns_roce_buf_attr buf_attr = {}; |
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int ret; |
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buf_attr.page_shift = hr_dev->caps.cqe_buf_pg_sz + PAGE_SHIFT; |
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buf_attr.region[0].size = hr_cq->cq_depth * hr_cq->cqe_size; |
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buf_attr.region[0].hopnum = hr_dev->caps.cqe_hop_num; |
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buf_attr.region_count = 1; |
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ret = hns_roce_mtr_create(hr_dev, &hr_cq->mtr, &buf_attr, |
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hr_dev->caps.cqe_ba_pg_sz + PAGE_SHIFT, |
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udata, addr); |
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if (ret) |
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ibdev_err(ibdev, "failed to alloc CQ mtr, ret = %d.\n", ret); |
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return ret; |
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} |
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static void free_cq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) |
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{ |
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hns_roce_mtr_destroy(hr_dev, &hr_cq->mtr); |
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} |
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static int alloc_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq, |
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struct ib_udata *udata, unsigned long addr, |
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struct hns_roce_ib_create_cq_resp *resp) |
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{ |
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bool has_db = hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_CQ_RECORD_DB; |
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struct hns_roce_ucontext *uctx; |
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int err; |
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if (udata) { |
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if (has_db && |
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udata->outlen >= offsetofend(typeof(*resp), cap_flags)) { |
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uctx = rdma_udata_to_drv_context(udata, |
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struct hns_roce_ucontext, ibucontext); |
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err = hns_roce_db_map_user(uctx, addr, &hr_cq->db); |
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if (err) |
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return err; |
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hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB; |
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resp->cap_flags |= HNS_ROCE_CQ_FLAG_RECORD_DB; |
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} |
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} else { |
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if (has_db) { |
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err = hns_roce_alloc_db(hr_dev, &hr_cq->db, 1); |
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if (err) |
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return err; |
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hr_cq->set_ci_db = hr_cq->db.db_record; |
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*hr_cq->set_ci_db = 0; |
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hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB; |
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} |
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hr_cq->db_reg = hr_dev->reg_base + hr_dev->odb_offset + |
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DB_REG_OFFSET * hr_dev->priv_uar.index; |
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} |
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return 0; |
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} |
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static void free_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq, |
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struct ib_udata *udata) |
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{ |
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struct hns_roce_ucontext *uctx; |
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if (!(hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB)) |
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return; |
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hr_cq->flags &= ~HNS_ROCE_CQ_FLAG_RECORD_DB; |
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if (udata) { |
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uctx = rdma_udata_to_drv_context(udata, |
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struct hns_roce_ucontext, |
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ibucontext); |
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hns_roce_db_unmap_user(uctx, &hr_cq->db); |
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} else { |
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hns_roce_free_db(hr_dev, &hr_cq->db); |
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} |
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} |
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static int verify_cq_create_attr(struct hns_roce_dev *hr_dev, |
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const struct ib_cq_init_attr *attr) |
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{ |
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struct ib_device *ibdev = &hr_dev->ib_dev; |
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if (!attr->cqe || attr->cqe > hr_dev->caps.max_cqes) { |
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ibdev_err(ibdev, "failed to check CQ count %u, max = %u.\n", |
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attr->cqe, hr_dev->caps.max_cqes); |
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return -EINVAL; |
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} |
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if (attr->comp_vector >= hr_dev->caps.num_comp_vectors) { |
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ibdev_err(ibdev, "failed to check CQ vector = %u, max = %d.\n", |
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attr->comp_vector, hr_dev->caps.num_comp_vectors); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int get_cq_ucmd(struct hns_roce_cq *hr_cq, struct ib_udata *udata, |
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struct hns_roce_ib_create_cq *ucmd) |
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{ |
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struct ib_device *ibdev = hr_cq->ib_cq.device; |
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int ret; |
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ret = ib_copy_from_udata(ucmd, udata, min(udata->inlen, sizeof(*ucmd))); |
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if (ret) { |
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ibdev_err(ibdev, "failed to copy CQ udata, ret = %d.\n", ret); |
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return ret; |
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} |
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return 0; |
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} |
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static void set_cq_param(struct hns_roce_cq *hr_cq, u32 cq_entries, int vector, |
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struct hns_roce_ib_create_cq *ucmd) |
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{ |
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struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device); |
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cq_entries = max(cq_entries, hr_dev->caps.min_cqes); |
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cq_entries = roundup_pow_of_two(cq_entries); |
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hr_cq->ib_cq.cqe = cq_entries - 1; /* used as cqe index */ |
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hr_cq->cq_depth = cq_entries; |
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hr_cq->vector = vector; |
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spin_lock_init(&hr_cq->lock); |
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INIT_LIST_HEAD(&hr_cq->sq_list); |
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INIT_LIST_HEAD(&hr_cq->rq_list); |
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} |
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static void set_cqe_size(struct hns_roce_cq *hr_cq, struct ib_udata *udata, |
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struct hns_roce_ib_create_cq *ucmd) |
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{ |
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struct hns_roce_dev *hr_dev = to_hr_dev(hr_cq->ib_cq.device); |
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|
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if (udata) { |
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if (udata->inlen >= offsetofend(typeof(*ucmd), cqe_size)) |
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hr_cq->cqe_size = ucmd->cqe_size; |
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else |
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hr_cq->cqe_size = HNS_ROCE_V2_CQE_SIZE; |
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} else { |
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hr_cq->cqe_size = hr_dev->caps.cqe_sz; |
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} |
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} |
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int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr, |
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struct ib_udata *udata) |
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{ |
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struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device); |
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struct hns_roce_ib_create_cq_resp resp = {}; |
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struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq); |
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struct ib_device *ibdev = &hr_dev->ib_dev; |
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struct hns_roce_ib_create_cq ucmd = {}; |
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int ret; |
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|
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if (attr->flags) |
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return -EOPNOTSUPP; |
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ret = verify_cq_create_attr(hr_dev, attr); |
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if (ret) |
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return ret; |
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if (udata) { |
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ret = get_cq_ucmd(hr_cq, udata, &ucmd); |
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if (ret) |
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return ret; |
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} |
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set_cq_param(hr_cq, attr->cqe, attr->comp_vector, &ucmd); |
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set_cqe_size(hr_cq, udata, &ucmd); |
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ret = alloc_cq_buf(hr_dev, hr_cq, udata, ucmd.buf_addr); |
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if (ret) { |
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ibdev_err(ibdev, "failed to alloc CQ buf, ret = %d.\n", ret); |
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return ret; |
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} |
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ret = alloc_cq_db(hr_dev, hr_cq, udata, ucmd.db_addr, &resp); |
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if (ret) { |
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ibdev_err(ibdev, "failed to alloc CQ db, ret = %d.\n", ret); |
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goto err_cq_buf; |
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} |
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ret = alloc_cqn(hr_dev, hr_cq); |
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if (ret) { |
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ibdev_err(ibdev, "failed to alloc CQN, ret = %d.\n", ret); |
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goto err_cq_db; |
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} |
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ret = alloc_cqc(hr_dev, hr_cq); |
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if (ret) { |
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ibdev_err(ibdev, |
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"failed to alloc CQ context, ret = %d.\n", ret); |
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goto err_cqn; |
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} |
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|
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/* |
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* For the QP created by kernel space, tptr value should be initialized |
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* to zero; For the QP created by user space, it will cause synchronous |
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* problems if tptr is set to zero here, so we initialize it in user |
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* space. |
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*/ |
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if (!udata && hr_cq->tptr_addr) |
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*hr_cq->tptr_addr = 0; |
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|
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if (udata) { |
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resp.cqn = hr_cq->cqn; |
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ret = ib_copy_to_udata(udata, &resp, |
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min(udata->outlen, sizeof(resp))); |
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if (ret) |
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goto err_cqc; |
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} |
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return 0; |
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err_cqc: |
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free_cqc(hr_dev, hr_cq); |
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err_cqn: |
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free_cqn(hr_dev, hr_cq->cqn); |
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err_cq_db: |
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free_cq_db(hr_dev, hr_cq, udata); |
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err_cq_buf: |
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free_cq_buf(hr_dev, hr_cq); |
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return ret; |
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} |
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|
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int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata) |
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{ |
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struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device); |
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struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq); |
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|
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if (hr_dev->hw->destroy_cq) |
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hr_dev->hw->destroy_cq(ib_cq, udata); |
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|
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free_cqc(hr_dev, hr_cq); |
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free_cqn(hr_dev, hr_cq->cqn); |
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free_cq_db(hr_dev, hr_cq, udata); |
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free_cq_buf(hr_dev, hr_cq); |
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|
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return 0; |
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} |
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|
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void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn) |
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{ |
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struct hns_roce_cq *hr_cq; |
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struct ib_cq *ibcq; |
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|
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hr_cq = xa_load(&hr_dev->cq_table.array, |
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cqn & (hr_dev->caps.num_cqs - 1)); |
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if (!hr_cq) { |
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dev_warn(hr_dev->dev, "Completion event for bogus CQ 0x%06x\n", |
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cqn); |
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return; |
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} |
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|
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++hr_cq->arm_sn; |
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ibcq = &hr_cq->ib_cq; |
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if (ibcq->comp_handler) |
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ibcq->comp_handler(ibcq, ibcq->cq_context); |
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} |
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|
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void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type) |
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{ |
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struct device *dev = hr_dev->dev; |
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struct hns_roce_cq *hr_cq; |
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struct ib_event event; |
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struct ib_cq *ibcq; |
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|
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hr_cq = xa_load(&hr_dev->cq_table.array, |
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cqn & (hr_dev->caps.num_cqs - 1)); |
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if (!hr_cq) { |
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dev_warn(dev, "Async event for bogus CQ 0x%06x\n", cqn); |
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return; |
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} |
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|
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if (event_type != HNS_ROCE_EVENT_TYPE_CQ_ID_INVALID && |
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event_type != HNS_ROCE_EVENT_TYPE_CQ_ACCESS_ERROR && |
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event_type != HNS_ROCE_EVENT_TYPE_CQ_OVERFLOW) { |
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dev_err(dev, "Unexpected event type 0x%x on CQ 0x%06x\n", |
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event_type, cqn); |
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return; |
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} |
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|
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refcount_inc(&hr_cq->refcount); |
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|
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ibcq = &hr_cq->ib_cq; |
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if (ibcq->event_handler) { |
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event.device = ibcq->device; |
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event.element.cq = ibcq; |
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event.event = IB_EVENT_CQ_ERR; |
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ibcq->event_handler(&event, ibcq->cq_context); |
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} |
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|
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if (refcount_dec_and_test(&hr_cq->refcount)) |
|
complete(&hr_cq->free); |
|
} |
|
|
|
void hns_roce_init_cq_table(struct hns_roce_dev *hr_dev) |
|
{ |
|
struct hns_roce_cq_table *cq_table = &hr_dev->cq_table; |
|
unsigned int reserved_from_bot; |
|
unsigned int i; |
|
|
|
mutex_init(&cq_table->bank_mutex); |
|
xa_init(&cq_table->array); |
|
|
|
reserved_from_bot = hr_dev->caps.reserved_cqs; |
|
|
|
for (i = 0; i < reserved_from_bot; i++) { |
|
cq_table->bank[get_cq_bankid(i)].inuse++; |
|
cq_table->bank[get_cq_bankid(i)].min++; |
|
} |
|
|
|
for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) { |
|
ida_init(&cq_table->bank[i].ida); |
|
cq_table->bank[i].max = hr_dev->caps.num_cqs / |
|
HNS_ROCE_CQ_BANK_NUM - 1; |
|
} |
|
} |
|
|
|
void hns_roce_cleanup_cq_table(struct hns_roce_dev *hr_dev) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < HNS_ROCE_CQ_BANK_NUM; i++) |
|
ida_destroy(&hr_dev->cq_table.bank[i].ida); |
|
}
|
|
|