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RDMA/hns: Support rq record doorbell for the user space
This patch adds interfaces and definitions to support the rq record doorbell for the user space. Signed-off-by: Yixian Liu <liuyixian@huawei.com> Signed-off-by: Lijun Ou <oulijun@huawei.com> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com> Signed-off-by: Shaobo Xu <xushaobo2@huawei.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
parent
036ef0a1a8
commit
e088a685ea
@ -7,7 +7,7 @@ ccflags-y := -Idrivers/net/ethernet/hisilicon/hns3
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obj-$(CONFIG_INFINIBAND_HNS) += hns-roce.o
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hns-roce-objs := hns_roce_main.o hns_roce_cmd.o hns_roce_pd.o \
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hns_roce_ah.o hns_roce_hem.o hns_roce_mr.o hns_roce_qp.o \
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hns_roce_cq.o hns_roce_alloc.o
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hns_roce_cq.o hns_roce_alloc.o hns_roce_db.o
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obj-$(CONFIG_INFINIBAND_HNS_HIP06) += hns-roce-hw-v1.o
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hns-roce-hw-v1-objs := hns_roce_hw_v1.o
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obj-$(CONFIG_INFINIBAND_HNS_HIP08) += hns-roce-hw-v2.o
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68
drivers/infiniband/hw/hns/hns_roce_db.c
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68
drivers/infiniband/hw/hns/hns_roce_db.c
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@ -0,0 +1,68 @@
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/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
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/*
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* Copyright (c) 2017 Hisilicon Limited.
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* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
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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 "hns_roce_device.h"
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int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,
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struct hns_roce_db *db)
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{
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struct hns_roce_user_db_page *page;
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int ret = 0;
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mutex_lock(&context->page_mutex);
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list_for_each_entry(page, &context->page_list, list)
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if (page->user_virt == (virt & PAGE_MASK))
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goto found;
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page = kmalloc(sizeof(*page), GFP_KERNEL);
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if (!page) {
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ret = -ENOMEM;
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goto out;
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}
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refcount_set(&page->refcount, 1);
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page->user_virt = (virt & PAGE_MASK);
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page->umem = ib_umem_get(&context->ibucontext, virt & PAGE_MASK,
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PAGE_SIZE, 0, 0);
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if (IS_ERR(page->umem)) {
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ret = PTR_ERR(page->umem);
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kfree(page);
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goto out;
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}
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list_add(&page->list, &context->page_list);
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found:
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db->dma = sg_dma_address(page->umem->sg_head.sgl) +
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(virt & ~PAGE_MASK);
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db->u.user_page = page;
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refcount_inc(&page->refcount);
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out:
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mutex_unlock(&context->page_mutex);
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return ret;
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}
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EXPORT_SYMBOL(hns_roce_db_map_user);
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void hns_roce_db_unmap_user(struct hns_roce_ucontext *context,
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struct hns_roce_db *db)
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{
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mutex_lock(&context->page_mutex);
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refcount_dec(&db->u.user_page->refcount);
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if (refcount_dec_if_one(&db->u.user_page->refcount)) {
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list_del(&db->u.user_page->list);
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ib_umem_release(db->u.user_page->umem);
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kfree(db->u.user_page);
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}
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mutex_unlock(&context->page_mutex);
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}
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EXPORT_SYMBOL(hns_roce_db_unmap_user);
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@ -105,6 +105,10 @@
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#define PAGES_SHIFT_24 24
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#define PAGES_SHIFT_32 32
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enum {
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HNS_ROCE_SUPPORT_RQ_RECORD_DB = 1 << 0,
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};
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enum hns_roce_qp_state {
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HNS_ROCE_QP_STATE_RST,
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HNS_ROCE_QP_STATE_INIT,
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@ -178,7 +182,8 @@ enum {
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enum {
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HNS_ROCE_CAP_FLAG_REREG_MR = BIT(0),
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HNS_ROCE_CAP_FLAG_ROCE_V1_V2 = BIT(1),
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HNS_ROCE_CAP_FLAG_RQ_INLINE = BIT(2)
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HNS_ROCE_CAP_FLAG_RQ_INLINE = BIT(2),
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HNS_ROCE_CAP_FLAG_RECORD_DB = BIT(3)
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};
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enum hns_roce_mtt_type {
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@ -186,6 +191,10 @@ enum hns_roce_mtt_type {
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MTT_TYPE_CQE,
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};
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enum {
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HNS_ROCE_DB_PER_PAGE = PAGE_SIZE / 4
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};
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#define HNS_ROCE_CMD_SUCCESS 1
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#define HNS_ROCE_PORT_DOWN 0
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@ -203,6 +212,8 @@ struct hns_roce_uar {
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struct hns_roce_ucontext {
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struct ib_ucontext ibucontext;
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struct hns_roce_uar uar;
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struct list_head page_list;
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struct mutex page_mutex;
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};
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struct hns_roce_pd {
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@ -335,6 +346,33 @@ struct hns_roce_buf {
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int page_shift;
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};
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struct hns_roce_db_pgdir {
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struct list_head list;
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DECLARE_BITMAP(order0, HNS_ROCE_DB_PER_PAGE);
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DECLARE_BITMAP(order1, HNS_ROCE_DB_PER_PAGE / 2);
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unsigned long *bits[2];
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u32 *page;
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dma_addr_t db_dma;
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};
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struct hns_roce_user_db_page {
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struct list_head list;
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struct ib_umem *umem;
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unsigned long user_virt;
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refcount_t refcount;
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};
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struct hns_roce_db {
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u32 *db_record;
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union {
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struct hns_roce_db_pgdir *pgdir;
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struct hns_roce_user_db_page *user_page;
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} u;
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dma_addr_t dma;
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int index;
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int order;
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};
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struct hns_roce_cq_buf {
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struct hns_roce_buf hr_buf;
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struct hns_roce_mtt hr_mtt;
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@ -466,6 +504,8 @@ struct hns_roce_qp {
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struct ib_qp ibqp;
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struct hns_roce_buf hr_buf;
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struct hns_roce_wq rq;
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struct hns_roce_db rdb;
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u8 rdb_en;
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u32 doorbell_qpn;
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__le32 sq_signal_bits;
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u32 sq_next_wqe;
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@ -930,6 +970,10 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
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int hns_roce_ib_destroy_cq(struct ib_cq *ib_cq);
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void hns_roce_free_cq(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq);
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int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,
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struct hns_roce_db *db);
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void hns_roce_db_unmap_user(struct hns_roce_ucontext *context,
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struct hns_roce_db *db);
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void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn);
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void hns_roce_cq_event(struct hns_roce_dev *hr_dev, u32 cqn, int event_type);
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void hns_roce_qp_event(struct hns_roce_dev *hr_dev, u32 qpn, int event_type);
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@ -1168,7 +1168,8 @@ static int hns_roce_v2_profile(struct hns_roce_dev *hr_dev)
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caps->flags = HNS_ROCE_CAP_FLAG_REREG_MR |
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HNS_ROCE_CAP_FLAG_ROCE_V1_V2 |
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HNS_ROCE_CAP_FLAG_RQ_INLINE;
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HNS_ROCE_CAP_FLAG_RQ_INLINE |
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HNS_ROCE_CAP_FLAG_RECORD_DB;
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caps->pkey_table_len[0] = 1;
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caps->gid_table_len[0] = HNS_ROCE_V2_GID_INDEX_NUM;
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caps->ceqe_depth = HNS_ROCE_V2_COMP_EQE_NUM;
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@ -2274,6 +2275,23 @@ static void modify_qp_reset_to_init(struct ib_qp *ibqp,
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hr_qp->qkey = attr->qkey;
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}
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if (hr_qp->rdb_en) {
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roce_set_bit(context->byte_68_rq_db,
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V2_QPC_BYTE_68_RQ_RECORD_EN_S, 1);
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roce_set_bit(qpc_mask->byte_68_rq_db,
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V2_QPC_BYTE_68_RQ_RECORD_EN_S, 0);
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}
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roce_set_field(context->byte_68_rq_db,
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V2_QPC_BYTE_68_RQ_DB_RECORD_ADDR_M,
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V2_QPC_BYTE_68_RQ_DB_RECORD_ADDR_S,
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((u32)hr_qp->rdb.dma) >> 1);
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roce_set_field(qpc_mask->byte_68_rq_db,
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V2_QPC_BYTE_68_RQ_DB_RECORD_ADDR_M,
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V2_QPC_BYTE_68_RQ_DB_RECORD_ADDR_S, 0);
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context->rq_db_record_addr = hr_qp->rdb.dma >> 32;
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qpc_mask->rq_db_record_addr = 0;
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roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RQIE_S, 1);
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roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RQIE_S, 0);
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@ -3211,6 +3229,8 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
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hr_qp->sq.tail = 0;
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hr_qp->sq_next_wqe = 0;
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hr_qp->next_sge = 0;
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if (hr_qp->rq.wqe_cnt)
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*hr_qp->rdb.db_record = 0;
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}
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out:
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@ -3437,6 +3457,10 @@ static int hns_roce_v2_destroy_qp_common(struct hns_roce_dev *hr_dev,
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hns_roce_mtt_cleanup(hr_dev, &hr_qp->mtt);
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if (is_user) {
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if (hr_qp->rq.wqe_cnt && (hr_qp->rdb_en == 1))
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hns_roce_db_unmap_user(
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to_hr_ucontext(hr_qp->ibqp.uobject->context),
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&hr_qp->rdb);
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ib_umem_release(hr_qp->umem);
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} else {
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kfree(hr_qp->sq.wrid);
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@ -351,6 +351,11 @@ static struct ib_ucontext *hns_roce_alloc_ucontext(struct ib_device *ib_dev,
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if (ret)
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goto error_fail_uar_alloc;
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if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
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INIT_LIST_HEAD(&context->page_list);
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mutex_init(&context->page_mutex);
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}
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ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
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if (ret)
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goto error_fail_copy_to_udata;
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@ -489,6 +489,15 @@ static int hns_roce_set_kernel_sq_size(struct hns_roce_dev *hr_dev,
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return 0;
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}
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static int hns_roce_qp_has_rq(struct ib_qp_init_attr *attr)
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{
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if (attr->qp_type == IB_QPT_XRC_INI ||
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attr->qp_type == IB_QPT_XRC_TGT || attr->srq)
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return 0;
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return 1;
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}
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static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
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struct ib_pd *ib_pd,
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struct ib_qp_init_attr *init_attr,
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@ -497,6 +506,7 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
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{
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struct device *dev = hr_dev->dev;
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struct hns_roce_ib_create_qp ucmd;
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struct hns_roce_ib_create_qp_resp resp;
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unsigned long qpn = 0;
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int ret = 0;
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u32 page_shift;
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@ -602,6 +612,18 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
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dev_err(dev, "hns_roce_ib_umem_write_mtt error for create qp\n");
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goto err_mtt;
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}
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if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
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(udata->outlen == sizeof(resp)) &&
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hns_roce_qp_has_rq(init_attr)) {
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ret = hns_roce_db_map_user(
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to_hr_ucontext(ib_pd->uobject->context),
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ucmd.db_addr, &hr_qp->rdb);
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if (ret) {
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dev_err(dev, "rp record doorbell map failed!\n");
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goto err_mtt;
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}
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}
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} else {
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if (init_attr->create_flags &
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IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) {
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@ -698,17 +720,44 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
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else
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hr_qp->doorbell_qpn = cpu_to_le64(hr_qp->qpn);
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if (ib_pd->uobject && (udata->outlen == sizeof(resp)) &&
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(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB)) {
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/* indicate kernel supports record db */
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resp.cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
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ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
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if (ret)
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goto err_qp;
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hr_qp->rdb_en = 1;
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}
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hr_qp->event = hns_roce_ib_qp_event;
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return 0;
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err_qp:
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if (init_attr->qp_type == IB_QPT_GSI &&
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hr_dev->hw_rev == HNS_ROCE_HW_VER1)
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hns_roce_qp_remove(hr_dev, hr_qp);
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else
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hns_roce_qp_free(hr_dev, hr_qp);
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err_qpn:
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if (!sqpn)
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hns_roce_release_range_qp(hr_dev, qpn, 1);
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err_wrid:
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kfree(hr_qp->sq.wrid);
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kfree(hr_qp->rq.wrid);
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if (ib_pd->uobject) {
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if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
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(udata->outlen == sizeof(resp)) &&
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hns_roce_qp_has_rq(init_attr))
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hns_roce_db_unmap_user(
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to_hr_ucontext(ib_pd->uobject->context),
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&hr_qp->rdb);
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} else {
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kfree(hr_qp->sq.wrid);
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kfree(hr_qp->rq.wrid);
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}
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err_mtt:
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hns_roce_mtt_cleanup(hr_dev, &hr_qp->mtt);
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@ -49,7 +49,12 @@ struct hns_roce_ib_create_qp {
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__u8 reserved[5];
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};
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struct hns_roce_ib_create_qp_resp {
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__u64 cap_flags;
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};
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struct hns_roce_ib_alloc_ucontext_resp {
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__u32 qp_tab_size;
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__u32 reserved;
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};
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#endif /* HNS_ABI_USER_H */
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