466 lines
11 KiB
C
466 lines
11 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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* Copyright (c) 2018 Hisilicon Limited.
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*/
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#include <linux/pci.h>
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#include <rdma/ib_umem.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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void hns_roce_srq_event(struct hns_roce_dev *hr_dev, u32 srqn, int event_type)
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{
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struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
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struct hns_roce_srq *srq;
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xa_lock(&srq_table->xa);
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srq = xa_load(&srq_table->xa, srqn & (hr_dev->caps.num_srqs - 1));
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if (srq)
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refcount_inc(&srq->refcount);
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xa_unlock(&srq_table->xa);
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if (!srq) {
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dev_warn(hr_dev->dev, "Async event for bogus SRQ %08x\n", srqn);
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return;
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}
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srq->event(srq, event_type);
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if (refcount_dec_and_test(&srq->refcount))
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complete(&srq->free);
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}
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static void hns_roce_ib_srq_event(struct hns_roce_srq *srq,
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enum hns_roce_event event_type)
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{
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struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device);
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struct ib_srq *ibsrq = &srq->ibsrq;
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struct ib_event event;
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if (ibsrq->event_handler) {
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event.device = ibsrq->device;
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event.element.srq = ibsrq;
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switch (event_type) {
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case HNS_ROCE_EVENT_TYPE_SRQ_LIMIT_REACH:
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event.event = IB_EVENT_SRQ_LIMIT_REACHED;
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break;
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case HNS_ROCE_EVENT_TYPE_SRQ_CATAS_ERROR:
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event.event = IB_EVENT_SRQ_ERR;
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break;
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default:
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dev_err(hr_dev->dev,
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"hns_roce:Unexpected event type 0x%x on SRQ %06lx\n",
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event_type, srq->srqn);
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return;
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}
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ibsrq->event_handler(&event, ibsrq->srq_context);
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}
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}
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static int alloc_srqn(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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struct hns_roce_ida *srq_ida = &hr_dev->srq_table.srq_ida;
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int id;
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id = ida_alloc_range(&srq_ida->ida, srq_ida->min, srq_ida->max,
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GFP_KERNEL);
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if (id < 0) {
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ibdev_err(&hr_dev->ib_dev, "failed to alloc srq(%d).\n", id);
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return -ENOMEM;
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}
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srq->srqn = id;
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return 0;
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}
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static void free_srqn(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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ida_free(&hr_dev->srq_table.srq_ida.ida, (int)srq->srqn);
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}
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static int hns_roce_create_srqc(struct hns_roce_dev *hr_dev,
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struct hns_roce_srq *srq)
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{
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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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int ret;
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mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
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if (IS_ERR(mailbox)) {
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ibdev_err(ibdev, "failed to alloc mailbox for SRQC.\n");
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return PTR_ERR(mailbox);
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}
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ret = hr_dev->hw->write_srqc(srq, mailbox->buf);
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if (ret) {
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ibdev_err(ibdev, "failed to write SRQC.\n");
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goto err_mbox;
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}
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ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_SRQ,
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srq->srqn);
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if (ret)
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ibdev_err(ibdev, "failed to config SRQC, ret = %d.\n", ret);
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err_mbox:
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hns_roce_free_cmd_mailbox(hr_dev, mailbox);
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return ret;
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}
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static int alloc_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
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struct ib_device *ibdev = &hr_dev->ib_dev;
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int ret;
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ret = hns_roce_table_get(hr_dev, &srq_table->table, srq->srqn);
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if (ret) {
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ibdev_err(ibdev, "failed to get SRQC table, ret = %d.\n", ret);
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return ret;
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}
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ret = xa_err(xa_store(&srq_table->xa, srq->srqn, srq, GFP_KERNEL));
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if (ret) {
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ibdev_err(ibdev, "failed to store SRQC, ret = %d.\n", ret);
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goto err_put;
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}
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ret = hns_roce_create_srqc(hr_dev, srq);
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if (ret)
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goto err_xa;
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return 0;
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err_xa:
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xa_erase(&srq_table->xa, srq->srqn);
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err_put:
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hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
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return ret;
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}
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static void free_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
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int ret;
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ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_SRQ,
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srq->srqn);
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if (ret)
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dev_err(hr_dev->dev, "DESTROY_SRQ failed (%d) for SRQN %06lx\n",
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ret, srq->srqn);
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xa_erase(&srq_table->xa, srq->srqn);
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if (refcount_dec_and_test(&srq->refcount))
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complete(&srq->free);
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wait_for_completion(&srq->free);
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hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
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}
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static int alloc_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
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struct ib_udata *udata, unsigned long addr)
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{
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struct hns_roce_idx_que *idx_que = &srq->idx_que;
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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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srq->idx_que.entry_shift = ilog2(HNS_ROCE_IDX_QUE_ENTRY_SZ);
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buf_attr.page_shift = hr_dev->caps.idx_buf_pg_sz + PAGE_SHIFT;
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buf_attr.region[0].size = to_hr_hem_entries_size(srq->wqe_cnt,
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srq->idx_que.entry_shift);
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buf_attr.region[0].hopnum = hr_dev->caps.idx_hop_num;
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buf_attr.region_count = 1;
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ret = hns_roce_mtr_create(hr_dev, &idx_que->mtr, &buf_attr,
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hr_dev->caps.idx_ba_pg_sz + PAGE_SHIFT,
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udata, addr);
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if (ret) {
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ibdev_err(ibdev,
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"failed to alloc SRQ idx mtr, ret = %d.\n", ret);
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return ret;
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}
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if (!udata) {
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idx_que->bitmap = bitmap_zalloc(srq->wqe_cnt, GFP_KERNEL);
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if (!idx_que->bitmap) {
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ibdev_err(ibdev, "failed to alloc SRQ idx bitmap.\n");
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ret = -ENOMEM;
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goto err_idx_mtr;
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}
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}
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idx_que->head = 0;
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idx_que->tail = 0;
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return 0;
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err_idx_mtr:
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hns_roce_mtr_destroy(hr_dev, &idx_que->mtr);
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return ret;
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}
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static void free_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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struct hns_roce_idx_que *idx_que = &srq->idx_que;
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bitmap_free(idx_que->bitmap);
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idx_que->bitmap = NULL;
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hns_roce_mtr_destroy(hr_dev, &idx_que->mtr);
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}
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static int alloc_srq_wqe_buf(struct hns_roce_dev *hr_dev,
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struct hns_roce_srq *srq,
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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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srq->wqe_shift = ilog2(roundup_pow_of_two(max(HNS_ROCE_SGE_SIZE,
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HNS_ROCE_SGE_SIZE *
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srq->max_gs)));
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buf_attr.page_shift = hr_dev->caps.srqwqe_buf_pg_sz + PAGE_SHIFT;
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buf_attr.region[0].size = to_hr_hem_entries_size(srq->wqe_cnt,
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srq->wqe_shift);
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buf_attr.region[0].hopnum = hr_dev->caps.srqwqe_hop_num;
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buf_attr.region_count = 1;
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ret = hns_roce_mtr_create(hr_dev, &srq->buf_mtr, &buf_attr,
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hr_dev->caps.srqwqe_ba_pg_sz + PAGE_SHIFT,
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udata, addr);
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if (ret)
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ibdev_err(ibdev,
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"failed to alloc SRQ buf mtr, ret = %d.\n", ret);
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return ret;
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}
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static void free_srq_wqe_buf(struct hns_roce_dev *hr_dev,
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struct hns_roce_srq *srq)
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{
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hns_roce_mtr_destroy(hr_dev, &srq->buf_mtr);
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}
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static int alloc_srq_wrid(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
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{
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srq->wrid = kvmalloc_array(srq->wqe_cnt, sizeof(u64), GFP_KERNEL);
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if (!srq->wrid)
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return -ENOMEM;
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return 0;
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}
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static void free_srq_wrid(struct hns_roce_srq *srq)
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{
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kvfree(srq->wrid);
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srq->wrid = NULL;
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}
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static u32 proc_srq_sge(struct hns_roce_dev *dev, struct hns_roce_srq *hr_srq,
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bool user)
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{
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u32 max_sge = dev->caps.max_srq_sges;
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if (dev->pci_dev->revision >= PCI_REVISION_ID_HIP09)
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return max_sge;
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/* Reserve SGEs only for HIP08 in kernel; The userspace driver will
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* calculate number of max_sge with reserved SGEs when allocating wqe
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* buf, so there is no need to do this again in kernel. But the number
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* may exceed the capacity of SGEs recorded in the firmware, so the
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* kernel driver should just adapt the value accordingly.
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*/
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if (user)
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max_sge = roundup_pow_of_two(max_sge + 1);
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else
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hr_srq->rsv_sge = 1;
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return max_sge;
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}
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static int set_srq_basic_param(struct hns_roce_srq *srq,
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struct ib_srq_init_attr *init_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(srq->ibsrq.device);
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struct ib_srq_attr *attr = &init_attr->attr;
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u32 max_sge;
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max_sge = proc_srq_sge(hr_dev, srq, !!udata);
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if (attr->max_wr > hr_dev->caps.max_srq_wrs ||
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attr->max_sge > max_sge) {
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ibdev_err(&hr_dev->ib_dev,
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"invalid SRQ attr, depth = %u, sge = %u.\n",
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attr->max_wr, attr->max_sge);
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return -EINVAL;
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}
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attr->max_wr = max_t(u32, attr->max_wr, HNS_ROCE_MIN_SRQ_WQE_NUM);
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srq->wqe_cnt = roundup_pow_of_two(attr->max_wr);
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srq->max_gs = roundup_pow_of_two(attr->max_sge + srq->rsv_sge);
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attr->max_wr = srq->wqe_cnt;
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attr->max_sge = srq->max_gs - srq->rsv_sge;
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attr->srq_limit = 0;
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return 0;
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}
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static void set_srq_ext_param(struct hns_roce_srq *srq,
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struct ib_srq_init_attr *init_attr)
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{
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srq->cqn = ib_srq_has_cq(init_attr->srq_type) ?
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to_hr_cq(init_attr->ext.cq)->cqn : 0;
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srq->xrcdn = (init_attr->srq_type == IB_SRQT_XRC) ?
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to_hr_xrcd(init_attr->ext.xrc.xrcd)->xrcdn : 0;
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}
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static int set_srq_param(struct hns_roce_srq *srq,
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struct ib_srq_init_attr *init_attr,
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struct ib_udata *udata)
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{
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int ret;
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ret = set_srq_basic_param(srq, init_attr, udata);
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if (ret)
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return ret;
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set_srq_ext_param(srq, init_attr);
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return 0;
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}
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static int alloc_srq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
|
||
|
|
struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct hns_roce_ib_create_srq ucmd = {};
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (udata) {
|
||
|
|
ret = ib_copy_from_udata(&ucmd, udata,
|
||
|
|
min(udata->inlen, sizeof(ucmd)));
|
||
|
|
if (ret) {
|
||
|
|
ibdev_err(&hr_dev->ib_dev,
|
||
|
|
"failed to copy SRQ udata, ret = %d.\n",
|
||
|
|
ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = alloc_srq_idx(hr_dev, srq, udata, ucmd.que_addr);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = alloc_srq_wqe_buf(hr_dev, srq, udata, ucmd.buf_addr);
|
||
|
|
if (ret)
|
||
|
|
goto err_idx;
|
||
|
|
|
||
|
|
if (!udata) {
|
||
|
|
ret = alloc_srq_wrid(hr_dev, srq);
|
||
|
|
if (ret)
|
||
|
|
goto err_wqe_buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_wqe_buf:
|
||
|
|
free_srq_wqe_buf(hr_dev, srq);
|
||
|
|
err_idx:
|
||
|
|
free_srq_idx(hr_dev, srq);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void free_srq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
|
||
|
|
{
|
||
|
|
free_srq_wrid(srq);
|
||
|
|
free_srq_wqe_buf(hr_dev, srq);
|
||
|
|
free_srq_idx(hr_dev, srq);
|
||
|
|
}
|
||
|
|
|
||
|
|
int hns_roce_create_srq(struct ib_srq *ib_srq,
|
||
|
|
struct ib_srq_init_attr *init_attr,
|
||
|
|
struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct hns_roce_dev *hr_dev = to_hr_dev(ib_srq->device);
|
||
|
|
struct hns_roce_ib_create_srq_resp resp = {};
|
||
|
|
struct hns_roce_srq *srq = to_hr_srq(ib_srq);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
mutex_init(&srq->mutex);
|
||
|
|
spin_lock_init(&srq->lock);
|
||
|
|
|
||
|
|
ret = set_srq_param(srq, init_attr, udata);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = alloc_srq_buf(hr_dev, srq, udata);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = alloc_srqn(hr_dev, srq);
|
||
|
|
if (ret)
|
||
|
|
goto err_srq_buf;
|
||
|
|
|
||
|
|
ret = alloc_srqc(hr_dev, srq);
|
||
|
|
if (ret)
|
||
|
|
goto err_srqn;
|
||
|
|
|
||
|
|
if (udata) {
|
||
|
|
resp.srqn = srq->srqn;
|
||
|
|
if (ib_copy_to_udata(udata, &resp,
|
||
|
|
min(udata->outlen, sizeof(resp)))) {
|
||
|
|
ret = -EFAULT;
|
||
|
|
goto err_srqc;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
srq->db_reg = hr_dev->reg_base + SRQ_DB_REG;
|
||
|
|
srq->event = hns_roce_ib_srq_event;
|
||
|
|
refcount_set(&srq->refcount, 1);
|
||
|
|
init_completion(&srq->free);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_srqc:
|
||
|
|
free_srqc(hr_dev, srq);
|
||
|
|
err_srqn:
|
||
|
|
free_srqn(hr_dev, srq);
|
||
|
|
err_srq_buf:
|
||
|
|
free_srq_buf(hr_dev, srq);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int hns_roce_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct hns_roce_dev *hr_dev = to_hr_dev(ibsrq->device);
|
||
|
|
struct hns_roce_srq *srq = to_hr_srq(ibsrq);
|
||
|
|
|
||
|
|
free_srqc(hr_dev, srq);
|
||
|
|
free_srqn(hr_dev, srq);
|
||
|
|
free_srq_buf(hr_dev, srq);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void hns_roce_init_srq_table(struct hns_roce_dev *hr_dev)
|
||
|
|
{
|
||
|
|
struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
|
||
|
|
struct hns_roce_ida *srq_ida = &srq_table->srq_ida;
|
||
|
|
|
||
|
|
xa_init(&srq_table->xa);
|
||
|
|
|
||
|
|
ida_init(&srq_ida->ida);
|
||
|
|
srq_ida->max = hr_dev->caps.num_srqs - 1;
|
||
|
|
srq_ida->min = hr_dev->caps.reserved_srqs;
|
||
|
|
}
|