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RDMA/hns: Support cq record doorbell for the user space 

This patch updates to 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: 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:
Yixian Liu 2018-03-09 18:36:30 +08:00 committed by Doug Ledford
parent e088a685ea
commit 9b44703d0a
5 changed files with 62 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/infiniband/hw/hns/hns_roce_cq.c
View File

@ -315,6 +315,7 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
struct device *dev = hr_dev->dev;
struct hns_roce_ib_create_cq ucmd;
struct hns_roce_ib_create_cq_resp resp;
struct hns_roce_cq *hr_cq = NULL;
struct hns_roce_uar *uar = NULL;
int vector = attr->comp_vector;
@ -378,6 +379,16 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
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;
}
}
/*
* For the QP created by kernel space, tptr value should be initialized
* to zero; For the QP created by user space, it will cause synchronous
@ -393,14 +404,27 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev,
hr_cq->cq_depth = cq_entries;
if (context) {
if (ib_copy_to_udata(udata, &hr_cq->cqn, sizeof(u64))) {
ret = -EFAULT;
goto err_cqc;
}
if ((hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) &&
(udata->outlen == sizeof(resp))) {
hr_cq->db_en = 1;
resp.cqn = hr_cq->cqn;
resp.cap_flags |= HNS_ROCE_SUPPORT_CQ_RECORD_DB;
ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
} else
ret = ib_copy_to_udata(udata, &hr_cq->cqn, sizeof(u64));
if (ret)
goto err_dbmap;
}
return &hr_cq->ib_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);
@ -430,12 +454,18 @@ int hns_roce_ib_destroy_cq(struct ib_cq *ib_cq)
hns_roce_free_cq(hr_dev, hr_cq);
hns_roce_mtt_cleanup(hr_dev, &hr_cq->hr_buf.hr_mtt);
if (ib_cq->uobject)
if (ib_cq->uobject) {
ib_umem_release(hr_cq->umem);
else
if (hr_cq->db_en == 1)
hns_roce_db_unmap_user(
to_hr_ucontext(ib_cq->uobject->context),
&hr_cq->db);
} else {
/* Free the buff of stored cq */
hns_roce_ib_free_cq_buf(hr_dev, &hr_cq->hr_buf,
ib_cq->cqe);
}
kfree(hr_cq);
}

6
drivers/infiniband/hw/hns/hns_roce_device.h
View File

@ -109,6 +109,10 @@ enum {
HNS_ROCE_SUPPORT_RQ_RECORD_DB = 1 << 0,
};
enum {
HNS_ROCE_SUPPORT_CQ_RECORD_DB = 1 << 0,
};
enum hns_roce_qp_state {
HNS_ROCE_QP_STATE_RST,
HNS_ROCE_QP_STATE_INIT,
@ -381,6 +385,8 @@ struct hns_roce_cq_buf {
struct hns_roce_cq {
struct ib_cq ib_cq;
struct hns_roce_cq_buf hr_buf;
struct hns_roce_db db;
u8 db_en;
spinlock_t lock;
struct ib_umem *umem;
void (*comp)(struct hns_roce_cq *cq);

10
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View File

@ -1638,6 +1638,16 @@ static void hns_roce_v2_write_cqc(struct hns_roce_dev *hr_dev,
roce_set_field(cq_context->byte_40_cqe_ba, V2_CQC_BYTE_40_CQE_BA_M,
V2_CQC_BYTE_40_CQE_BA_S, (dma_handle >> (32 + 3)));
if (hr_cq->db_en)
roce_set_bit(cq_context->byte_44_db_record,
V2_CQC_BYTE_44_DB_RECORD_EN_S, 1);
roce_set_field(cq_context->byte_44_db_record,
V2_CQC_BYTE_44_DB_RECORD_ADDR_M,
V2_CQC_BYTE_44_DB_RECORD_ADDR_S,
((u32)hr_cq->db.dma) >> 1);
cq_context->db_record_addr = hr_cq->db.dma >> 32;
roce_set_field(cq_context->byte_56_cqe_period_maxcnt,
V2_CQC_BYTE_56_CQ_MAX_CNT_M,
V2_CQC_BYTE_56_CQ_MAX_CNT_S,

3
drivers/infiniband/hw/hns/hns_roce_hw_v2.h
View File

@ -299,6 +299,9 @@ struct hns_roce_v2_cq_context {
#define V2_CQC_BYTE_44_DB_RECORD_EN_S 0
#define V2_CQC_BYTE_44_DB_RECORD_ADDR_S 1
#define V2_CQC_BYTE_44_DB_RECORD_ADDR_M GENMASK(31, 1)
#define V2_CQC_BYTE_52_CQE_CNT_S 0
#define V2_CQC_BYTE_52_CQE_CNT_M GENMASK(23, 0)

7
include/uapi/rdma/hns-abi.h
View File

@ -38,6 +38,13 @@
struct hns_roce_ib_create_cq {
__u64 buf_addr;
__u64 db_addr;
};
struct hns_roce_ib_create_cq_resp {
__u32 cqn;
__u32 reserved;
__u64 cap_flags;
};
struct hns_roce_ib_create_qp {