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RDMA/hns: Simplify the cqe code of poll cq 

Encapsulate codes to get status of cqe into a function and use map table
instead of switch-case to reduce cyclomatic complexity of
hns_roce_v2_poll_one().

Link: https://lore.kernel.org/r/1586938475-37049-5-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Lang Cheng 2020-04-15 16:14:33 +08:00 committed by Jason Gunthorpe
parent a3de9e8381
commit 7c044adca2
1 changed files with 57 additions and 73 deletions
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130
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View File

@ -2955,6 +2955,61 @@ static int hns_roce_v2_sw_poll_cq(struct hns_roce_cq *hr_cq, int num_entries,
return npolled;
}
static void get_cqe_status(struct hns_roce_dev *hr_dev, struct hns_roce_qp *qp,
struct hns_roce_v2_cqe *cqe, struct ib_wc *wc)
{
static const struct {
u32 cqe_status;
enum ib_wc_status wc_status;
} map[] = {
{ HNS_ROCE_CQE_V2_SUCCESS, IB_WC_SUCCESS },
{ HNS_ROCE_CQE_V2_LOCAL_LENGTH_ERR, IB_WC_LOC_LEN_ERR },
{ HNS_ROCE_CQE_V2_LOCAL_QP_OP_ERR, IB_WC_LOC_QP_OP_ERR },
{ HNS_ROCE_CQE_V2_LOCAL_PROT_ERR, IB_WC_LOC_PROT_ERR },
{ HNS_ROCE_CQE_V2_WR_FLUSH_ERR, IB_WC_WR_FLUSH_ERR },
{ HNS_ROCE_CQE_V2_MW_BIND_ERR, IB_WC_MW_BIND_ERR },
{ HNS_ROCE_CQE_V2_BAD_RESP_ERR, IB_WC_BAD_RESP_ERR },
{ HNS_ROCE_CQE_V2_LOCAL_ACCESS_ERR, IB_WC_LOC_ACCESS_ERR },
{ HNS_ROCE_CQE_V2_REMOTE_INVAL_REQ_ERR, IB_WC_REM_INV_REQ_ERR },
{ HNS_ROCE_CQE_V2_REMOTE_ACCESS_ERR, IB_WC_REM_ACCESS_ERR },
{ HNS_ROCE_CQE_V2_REMOTE_OP_ERR, IB_WC_REM_OP_ERR },
{ HNS_ROCE_CQE_V2_TRANSPORT_RETRY_EXC_ERR,
IB_WC_RETRY_EXC_ERR },
{ HNS_ROCE_CQE_V2_RNR_RETRY_EXC_ERR, IB_WC_RNR_RETRY_EXC_ERR },
{ HNS_ROCE_CQE_V2_REMOTE_ABORT_ERR, IB_WC_REM_ABORT_ERR },
};
u32 cqe_status = roce_get_field(cqe->byte_4, V2_CQE_BYTE_4_STATUS_M,
V2_CQE_BYTE_4_STATUS_S);
int i;
wc->status = IB_WC_GENERAL_ERR;
for (i = 0; i < ARRAY_SIZE(map); i++)
if (cqe_status == map[i].cqe_status) {
wc->status = map[i].wc_status;
break;
}
if (wc->status == IB_WC_SUCCESS || wc->status == IB_WC_WR_FLUSH_ERR)
return;
ibdev_err(&hr_dev->ib_dev, "error cqe status 0x%x:\n", cqe_status);
print_hex_dump(KERN_ERR, "", DUMP_PREFIX_NONE, 16, 4, cqe,
sizeof(*cqe), false);
/*
* Hip08 hardware cannot flush the WQEs in SQ/RQ if the QP state gets
* into errored mode. Hence, as a workaround to this hardware
* limitation, driver needs to assist in flushing. But the flushing
* operation uses mailbox to convey the QP state to the hardware and
* which can sleep due to the mutex protection around the mailbox calls.
* Hence, use the deferred flush for now. Once wc error detected, the
* flushing operation is needed.
*/
if (!test_and_set_bit(HNS_ROCE_FLUSH_FLAG, &qp->flush_flag))
init_flush_work(hr_dev, qp);
}
static int hns_roce_v2_poll_one(struct hns_roce_cq *hr_cq,
struct hns_roce_qp **cur_qp, struct ib_wc *wc)
{
@ -2966,7 +3021,6 @@ static int hns_roce_v2_poll_one(struct hns_roce_cq *hr_cq,
int is_send;
u16 wqe_ctr;
u32 opcode;
u32 status;
int qpn;
int ret;
@ -2996,7 +3050,6 @@ static int hns_roce_v2_poll_one(struct hns_roce_cq *hr_cq,
*cur_qp = hr_qp;
}
hr_qp = *cur_qp;
wc->qp = &(*cur_qp)->ibqp;
wc->vendor_err = 0;
@ -3031,77 +3084,8 @@ static int hns_roce_v2_poll_one(struct hns_roce_cq *hr_cq,
++wq->tail;
}
status = roce_get_field(cqe->byte_4, V2_CQE_BYTE_4_STATUS_M,
V2_CQE_BYTE_4_STATUS_S);
switch (status & HNS_ROCE_V2_CQE_STATUS_MASK) {
case HNS_ROCE_CQE_V2_SUCCESS:
wc->status = IB_WC_SUCCESS;
break;
case HNS_ROCE_CQE_V2_LOCAL_LENGTH_ERR:
wc->status = IB_WC_LOC_LEN_ERR;
break;
case HNS_ROCE_CQE_V2_LOCAL_QP_OP_ERR:
wc->status = IB_WC_LOC_QP_OP_ERR;
break;
case HNS_ROCE_CQE_V2_LOCAL_PROT_ERR:
wc->status = IB_WC_LOC_PROT_ERR;
break;
case HNS_ROCE_CQE_V2_WR_FLUSH_ERR:
wc->status = IB_WC_WR_FLUSH_ERR;
break;
case HNS_ROCE_CQE_V2_MW_BIND_ERR:
wc->status = IB_WC_MW_BIND_ERR;
break;
case HNS_ROCE_CQE_V2_BAD_RESP_ERR:
wc->status = IB_WC_BAD_RESP_ERR;
break;
case HNS_ROCE_CQE_V2_LOCAL_ACCESS_ERR:
wc->status = IB_WC_LOC_ACCESS_ERR;
break;
case HNS_ROCE_CQE_V2_REMOTE_INVAL_REQ_ERR:
wc->status = IB_WC_REM_INV_REQ_ERR;
break;
case HNS_ROCE_CQE_V2_REMOTE_ACCESS_ERR:
wc->status = IB_WC_REM_ACCESS_ERR;
break;
case HNS_ROCE_CQE_V2_REMOTE_OP_ERR:
wc->status = IB_WC_REM_OP_ERR;
break;
case HNS_ROCE_CQE_V2_TRANSPORT_RETRY_EXC_ERR:
wc->status = IB_WC_RETRY_EXC_ERR;
break;
case HNS_ROCE_CQE_V2_RNR_RETRY_EXC_ERR:
wc->status = IB_WC_RNR_RETRY_EXC_ERR;
break;
case HNS_ROCE_CQE_V2_REMOTE_ABORT_ERR:
wc->status = IB_WC_REM_ABORT_ERR;
break;
default:
wc->status = IB_WC_GENERAL_ERR;
break;
}
/*
* Hip08 hardware cannot flush the WQEs in SQ/RQ if the QP state gets
* into errored mode. Hence, as a workaround to this hardware
* limitation, driver needs to assist in flushing. But the flushing
* operation uses mailbox to convey the QP state to the hardware and
* which can sleep due to the mutex protection around the mailbox calls.
* Hence, use the deferred flush for now. Once wc error detected, the
* flushing operation is needed.
*/
if (wc->status != IB_WC_SUCCESS &&
wc->status != IB_WC_WR_FLUSH_ERR) {
ibdev_err(&hr_dev->ib_dev, "error cqe status is: 0x%x\n",
status & HNS_ROCE_V2_CQE_STATUS_MASK);
if (!test_and_set_bit(HNS_ROCE_FLUSH_FLAG, &hr_qp->flush_flag))
init_flush_work(hr_dev, hr_qp);
return 0;
}
if (wc->status == IB_WC_WR_FLUSH_ERR)
get_cqe_status(hr_dev, *cur_qp, cqe, wc);
if (wc->status != IB_WC_SUCCESS)
return 0;
if (is_send) {