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RDMA/hns: Simplify the state judgment code of qp 

Use state table to make the qp state migrate code more readable.

Link: https://lore.kernel.org/r/1586938475-37049-6-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 16:14:34 +08:00 коммит произвёл Jason Gunthorpe
Родитель 7c044adca2
Коммит 357f342946
1 изменённых файлов: 27 добавлений и 27 удалений
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54
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
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@ -4077,21 +4077,6 @@ static int modify_qp_rtr_to_rts(struct ib_qp *ibqp,
return 0;
}
static inline bool hns_roce_v2_check_qp_stat(enum ib_qp_state cur_state,
enum ib_qp_state new_state)
{
if ((cur_state != IB_QPS_RESET &&
(new_state == IB_QPS_ERR || new_state == IB_QPS_RESET)) ||
((cur_state == IB_QPS_RTS || cur_state == IB_QPS_SQD) &&
(new_state == IB_QPS_RTS || new_state == IB_QPS_SQD)) ||
(cur_state == IB_QPS_SQE && new_state == IB_QPS_RTS))
return true;
return false;
}
static int hns_roce_v2_set_path(struct ib_qp *ibqp,
const struct ib_qp_attr *attr,
int attr_mask,
@ -4195,6 +4180,28 @@ static int hns_roce_v2_set_path(struct ib_qp *ibqp,
return 0;
}
static bool check_qp_state(enum ib_qp_state cur_state,
enum ib_qp_state new_state)
{
static const bool sm[][IB_QPS_ERR + 1] = {
[IB_QPS_RESET] = { [IB_QPS_RESET] = true,
[IB_QPS_INIT] = true },
[IB_QPS_INIT] = { [IB_QPS_RESET] = true,
[IB_QPS_INIT] = true,
[IB_QPS_RTR] = true,
[IB_QPS_ERR] = true },
[IB_QPS_RTR] = { [IB_QPS_RESET] = true,
[IB_QPS_RTS] = true,
[IB_QPS_ERR] = true },
[IB_QPS_RTS] = { [IB_QPS_RESET] = true, [IB_QPS_ERR] = true },
[IB_QPS_SQD] = {},
[IB_QPS_SQE] = {},
[IB_QPS_ERR] = { [IB_QPS_RESET] = true, [IB_QPS_ERR] = true }
};
return sm[cur_state][new_state];
}
static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
const struct ib_qp_attr *attr,
int attr_mask,
@ -4206,6 +4213,11 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
int ret = 0;
if (!check_qp_state(cur_state, new_state)) {
ibdev_err(&hr_dev->ib_dev, "Illegal state for QP!\n");
return -EINVAL;
}
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
memset(qpc_mask, 0, sizeof(*qpc_mask));
modify_qp_reset_to_init(ibqp, attr, attr_mask, context,
@ -4216,23 +4228,11 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
} else if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
ret = modify_qp_init_to_rtr(ibqp, attr, attr_mask, context,
qpc_mask);
if (ret)
goto out;
} else if (cur_state == IB_QPS_RTR && new_state == IB_QPS_RTS) {
ret = modify_qp_rtr_to_rts(ibqp, attr, attr_mask, context,
qpc_mask);
if (ret)
goto out;
} else if (hns_roce_v2_check_qp_stat(cur_state, new_state)) {
/* Nothing */
;
} else {
ibdev_err(&hr_dev->ib_dev, "Illegal state for QP!\n");
ret = -EINVAL;
goto out;
}
out:
return ret;
}