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RDMA/hns: Modify the usage of cmd_sn in hip08 

The cmd_sn field of CQ doorbell inits for 0. It should be
increment on each first db rung after a completion Event.
if the cmd_sn of notify doorbell Adjacent two times is the
same, the hardware will distinguish it for the same notify
request and update its type according to the priority level
of next event and solicited event.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
oulijun 2017-11-10 16:55:53 +08:00 committed by Doug Ledford
parent 0203b14c4f
commit 26beb85f41
3 changed files with 4 additions and 1 deletions
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2
drivers/infiniband/hw/hns/hns_roce_cq.c
View File

@ -156,6 +156,7 @@ static int hns_roce_cq_alloc(struct hns_roce_dev *hr_dev, int nent,
}
hr_cq->cons_index = 0;
hr_cq->arm_sn = 1;
hr_cq->uar = hr_uar;
atomic_set(&hr_cq->refcount, 1);
@ -456,6 +457,7 @@ void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
return;
}
++cq->arm_sn;
cq->comp(cq);
}

1
drivers/infiniband/hw/hns/hns_roce_device.h
View File

@ -347,6 +347,7 @@ struct hns_roce_cq {
u32 cons_index;
void __iomem *cq_db_l;
u16 *tptr_addr;
int arm_sn;
unsigned long cqn;
u32 vector;
atomic_t refcount;

2
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View File

@ -1440,7 +1440,7 @@ static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq,
V2_CQ_DB_PARAMETER_CONS_IDX_S,
hr_cq->cons_index & ((hr_cq->cq_depth << 1) - 1));
roce_set_field(doorbell[1], V2_CQ_DB_PARAMETER_CMD_SN_M,
V2_CQ_DB_PARAMETER_CMD_SN_S, 1);
V2_CQ_DB_PARAMETER_CMD_SN_S, hr_cq->arm_sn & 0x3);
roce_set_bit(doorbell[1], V2_CQ_DB_PARAMETER_NOTIFY_S,
notification_flag);