diff options
author | Gal Pressman <galpress@amazon.com> | 2020-07-31 09:04:19 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-08-18 20:52:45 +0300 |
commit | 22c50e0660f40173eec8a5b714b27ef9e64b93c7 (patch) | |
tree | c1de32dbf60a60a8d8673d8cdb60529025992c02 /drivers/infiniband/hw/efa | |
parent | ab67badd1c5e0c82a6cc09c3e9389d97672075b3 (diff) | |
download | linux-22c50e0660f40173eec8a5b714b27ef9e64b93c7.tar.xz |
RDMA/efa: Introduce SRD QP state machine
This precursory patch adds the SRD QP type state machine, which is
currently identical to the one of UD QP type. A following patch is going
to change the SRD QP state machine to support RNR retry modifications.
Link: https://lore.kernel.org/r/20200731060420.17053-4-galpress@amazon.com
Reviewed-by: Firas JahJah <firasj@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/efa')
-rw-r--r-- | drivers/infiniband/hw/efa/efa_verbs.c | 119 |
1 files changed, 117 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 64e8771db4e2..289ecdeb9a7b 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -740,11 +740,120 @@ err_out: return ERR_PTR(err); } +static const struct { + int valid; + enum ib_qp_attr_mask req_param; + enum ib_qp_attr_mask opt_param; +} srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { + [IB_QPS_RESET] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_INIT] = { + .valid = 1, + .req_param = IB_QP_PKEY_INDEX | + IB_QP_PORT | + IB_QP_QKEY, + }, + }, + [IB_QPS_INIT] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + [IB_QPS_INIT] = { + .valid = 1, + .opt_param = IB_QP_PKEY_INDEX | + IB_QP_PORT | + IB_QP_QKEY, + }, + [IB_QPS_RTR] = { + .valid = 1, + .opt_param = IB_QP_PKEY_INDEX | + IB_QP_QKEY, + }, + }, + [IB_QPS_RTR] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + [IB_QPS_RTS] = { + .valid = 1, + .req_param = IB_QP_SQ_PSN, + .opt_param = IB_QP_CUR_STATE | + IB_QP_QKEY, + } + }, + [IB_QPS_RTS] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + [IB_QPS_RTS] = { + .valid = 1, + .opt_param = IB_QP_CUR_STATE | + IB_QP_QKEY, + }, + [IB_QPS_SQD] = { + .valid = 1, + .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY, + }, + }, + [IB_QPS_SQD] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + [IB_QPS_RTS] = { + .valid = 1, + .opt_param = IB_QP_CUR_STATE | + IB_QP_QKEY, + }, + [IB_QPS_SQD] = { + .valid = 1, + .opt_param = IB_QP_PKEY_INDEX | + IB_QP_QKEY, + } + }, + [IB_QPS_SQE] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + [IB_QPS_RTS] = { + .valid = 1, + .opt_param = IB_QP_CUR_STATE | + IB_QP_QKEY, + } + }, + [IB_QPS_ERR] = { + [IB_QPS_RESET] = { .valid = 1 }, + [IB_QPS_ERR] = { .valid = 1 }, + } +}; + +static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state, + enum ib_qp_state next_state, + enum ib_qp_attr_mask mask) +{ + enum ib_qp_attr_mask req_param, opt_param; + + if (mask & IB_QP_CUR_STATE && + cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && + cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) + return false; + + if (!srd_qp_state_table[cur_state][next_state].valid) + return false; + + req_param = srd_qp_state_table[cur_state][next_state].req_param; + opt_param = srd_qp_state_table[cur_state][next_state].opt_param; + + if ((mask & req_param) != req_param) + return false; + + if (mask & ~(req_param | opt_param | IB_QP_STATE)) + return false; + + return true; +} + static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp, struct ib_qp_attr *qp_attr, int qp_attr_mask, enum ib_qp_state cur_state, enum ib_qp_state new_state) { + int err; + #define EFA_MODIFY_QP_SUPP_MASK \ (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \ IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN) @@ -756,8 +865,14 @@ static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp, return -EOPNOTSUPP; } - if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD, - qp_attr_mask)) { + if (qp->ibqp.qp_type == IB_QPT_DRIVER) + err = !efa_modify_srd_qp_is_ok(cur_state, new_state, + qp_attr_mask); + else + err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD, + qp_attr_mask); + + if (err) { ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n"); return -EINVAL; } |