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RDMA/hns: Fix cq record doorbell enable in kernel 

Upon detecting both kernel and user space support record doorbell,
the kernel needs to enable this capability in hardware by db_en,
and it should take place before cq context configuration in
hns_roce_cq_alloc. Currently, db_en is configured after cq alloc
and db_map_user has similar problem.

Reported-by: Xiping Zhang <zhangxiping3@huawei.com>
Fixes: 9b44703d0a ("RDMA/hns: Support cq 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: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Yixian Liu 2018-03-21 14:11:18 +08:00 committed by Jason Gunthorpe
parent 761fc376c9
commit e95955773d
1 changed files with 17 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/infiniband/hw/hns/hns_roce_cq.c
View File

@ -355,6 +355,18 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
goto err_cq;
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp))) {
ret = hns_roce_db_map_user(to_hr_ucontext(context),
ucmd.db_addr, &hr_cq->db);
if (ret) {
dev_err(dev, "cq record doorbell map failed!\n");
goto err_mtt;
}
hr_cq->db_en = 1;
resp.cap_flags |= HNS_ROCE_SUPPORT_CQ_RECORD_DB;
}
/* Get user space parameters */
uar = &to_hr_ucontext(context)->uar;
} else {
@ -385,17 +397,7 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
hr_cq, vector);
if (ret) {
dev_err(dev, "Creat CQ .Failed to cq_alloc.\n");
goto err_mtt;
}
if (context && (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp))) {
ret = hns_roce_db_map_user(to_hr_ucontext(context),
ucmd.db_addr, &hr_cq->db);
if (ret) {
dev_err(dev, "cq record doorbell map failed!\n");
goto err_cqc;
}
goto err_dbmap;
}
/*
@ -414,28 +416,22 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
if (context) {
resp.cqn = hr_cq->cqn;
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp))) {
hr_cq->db_en = 1;
resp.cap_flags |= HNS_ROCE_SUPPORT_CQ_RECORD_DB;
}
ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (ret)
goto err_dbmap;
goto err_cqc;
}
return &hr_cq->ib_cq;
err_cqc:
hns_roce_free_cq(hr_dev, hr_cq);
err_dbmap:
if (context && (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen >= sizeof(resp)))
hns_roce_db_unmap_user(to_hr_ucontext(context),
&hr_cq->db);
err_cqc:
hns_roce_free_cq(hr_dev, hr_cq);
err_mtt:
hns_roce_mtt_cleanup(hr_dev, &hr_cq->hr_buf.hr_mtt);
if (context)