/**
* rvt_query_port: Passes the query port call to the driver
* @ibdev: Verbs IB dev
* @port_num: port number, 1 based from ib core
* @props: structure to hold returned properties
*
* Return: 0 on success
*/
static int rvt_query_port(struct ib_device *ibdev, u8 port_num,
struct ib_port_attr *props)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
struct rvt_ibport *rvp;
int port_index = ibport_num_to_idx(ibdev, port_num);
if (port_index < 0)
return -EINVAL;
rvp = rdi->ports[port_index];
/* props being zeroed by the caller, avoid zeroing it here */
props->sm_lid = rvp->sm_lid;
props->sm_sl = rvp->sm_sl;
props->port_cap_flags = rvp->port_cap_flags;
props->max_msg_sz = 0x80000000;
props->pkey_tbl_len = rvt_get_npkeys(rdi);
props->bad_pkey_cntr = rvp->pkey_violations;
props->qkey_viol_cntr = rvp->qkey_violations;
props->subnet_timeout = rvp->subnet_timeout;
props->init_type_reply = 0;
/* Populate the remaining ib_port_attr elements */
return rdi->driver_f.query_port_state(rdi, port_num, props);
}
/**
* rvt_query_pkey - Return a pkey from the table at a given index
* @ibdev: Verbs IB dev
* @port_num: Port number, 1 based from ib core
* @index: Index into pkey table
* @pkey: returned pkey from the port pkey table
*
* Return: 0 on failure pkey otherwise
*/
static int rvt_query_pkey(struct ib_device *ibdev, u8 port_num, u16 index,
u16 *pkey)
{
/*
* Driver will be responsible for keeping rvt_dev_info.pkey_table up to
* date. This function will just return that value. There is no need to
* lock, if a stale value is read and sent to the user so be it there is
* no way to protect against that anyway.
*/
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
int port_index;
port_index = ibport_num_to_idx(ibdev, port_num);
if (port_index < 0)
return -EINVAL;
if (index >= rvt_get_npkeys(rdi))
return -EINVAL;
*pkey = rvt_get_pkey(rdi, port_index, index);
return 0;
}
/**
* qib_modify_qp - modify the attributes of a queue pair
* @ibqp: the queue pair who's attributes we're modifying
* @attr: the new attributes
* @attr_mask: the mask of attributes to modify
* @udata: user data for libibverbs.so
*
* Return: 0 on success, otherwise returns an errno.
*/
int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
struct rvt_qp *qp = ibqp_to_rvtqp(ibqp);
enum ib_qp_state cur_state, new_state;
struct ib_event ev;
int lastwqe = 0;
int mig = 0;
int pmtu = 0; /* for gcc warning only */
enum rdma_link_layer link;
link = rdma_port_get_link_layer(ibqp->device, qp->port_num);
spin_lock_irq(&qp->r_lock);
spin_lock(&qp->s_hlock);
spin_lock(&qp->s_lock);
cur_state = attr_mask & IB_QP_CUR_STATE ?
attr->cur_qp_state : qp->state;
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
attr_mask, link))
goto inval;
if (rdi->driver_f.check_modify_qp &&
rdi->driver_f.check_modify_qp(qp, attr, attr_mask, udata))
goto inval;
if (attr_mask & IB_QP_AV) {
if (attr->ah_attr.dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
goto inval;
if (rvt_check_ah(qp->ibqp.device, &attr->ah_attr))
goto inval;
}
if (attr_mask & IB_QP_ALT_PATH) {
if (attr->alt_ah_attr.dlid >=
be16_to_cpu(IB_MULTICAST_LID_BASE))
goto inval;
if (rvt_check_ah(qp->ibqp.device, &attr->alt_ah_attr))
goto inval;
if (attr->alt_pkey_index >= rvt_get_npkeys(rdi))
goto inval;
}
if (attr_mask & IB_QP_PKEY_INDEX)
if (attr->pkey_index >= rvt_get_npkeys(rdi))
goto inval;
if (attr_mask & IB_QP_MIN_RNR_TIMER)
if (attr->min_rnr_timer > 31)
goto inval;
if (attr_mask & IB_QP_PORT)
if (qp->ibqp.qp_type == IB_QPT_SMI ||
qp->ibqp.qp_type == IB_QPT_GSI ||
attr->port_num == 0 ||
attr->port_num > ibqp->device->phys_port_cnt)
goto inval;
if (attr_mask & IB_QP_DEST_QPN)
if (attr->dest_qp_num > RVT_QPN_MASK)
goto inval;
if (attr_mask & IB_QP_RETRY_CNT)
if (attr->retry_cnt > 7)
goto inval;
if (attr_mask & IB_QP_RNR_RETRY)
if (attr->rnr_retry > 7)
goto inval;
/*
* Don't allow invalid path_mtu values. OK to set greater
* than the active mtu (or even the max_cap, if we have tuned
* that to a small mtu. We'll set qp->path_mtu
* to the lesser of requested attribute mtu and active,
* for packetizing messages.
* Note that the QP port has to be set in INIT and MTU in RTR.
*/
if (attr_mask & IB_QP_PATH_MTU) {
pmtu = rdi->driver_f.get_pmtu_from_attr(rdi, qp, attr);
if (pmtu < 0)
goto inval;
}
if (attr_mask & IB_QP_PATH_MIG_STATE) {
if (attr->path_mig_state == IB_MIG_REARM) {
if (qp->s_mig_state == IB_MIG_ARMED)
goto inval;
if (new_state != IB_QPS_RTS)
goto inval;
} else if (attr->path_mig_state == IB_MIG_MIGRATED) {
if (qp->s_mig_state == IB_MIG_REARM)
goto inval;
if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD)
goto inval;
if (qp->s_mig_state == IB_MIG_ARMED)
mig = 1;
} else {
goto inval;
}
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
if (attr->max_dest_rd_atomic > rdi->dparms.max_rdma_atomic)
goto inval;
switch (new_state) {
case IB_QPS_RESET:
if (qp->state != IB_QPS_RESET)
rvt_reset_qp(rdi, qp, ibqp->qp_type);
break;
case IB_QPS_RTR:
/* Allow event to re-trigger if QP set to RTR more than once */
qp->r_flags &= ~RVT_R_COMM_EST;
qp->state = new_state;
break;
case IB_QPS_SQD:
qp->s_draining = qp->s_last != qp->s_cur;
qp->state = new_state;
break;
case IB_QPS_SQE:
if (qp->ibqp.qp_type == IB_QPT_RC)
goto inval;
qp->state = new_state;
break;
case IB_QPS_ERR:
lastwqe = rvt_error_qp(qp, IB_WC_WR_FLUSH_ERR);
break;
default:
qp->state = new_state;
break;
}
if (attr_mask & IB_QP_PKEY_INDEX)
qp->s_pkey_index = attr->pkey_index;
if (attr_mask & IB_QP_PORT)
qp->port_num = attr->port_num;
if (attr_mask & IB_QP_DEST_QPN)
qp->remote_qpn = attr->dest_qp_num;
if (attr_mask & IB_QP_SQ_PSN) {
qp->s_next_psn = attr->sq_psn & rdi->dparms.psn_modify_mask;
qp->s_psn = qp->s_next_psn;
qp->s_sending_psn = qp->s_next_psn;
qp->s_last_psn = qp->s_next_psn - 1;
qp->s_sending_hpsn = qp->s_last_psn;
}
if (attr_mask & IB_QP_RQ_PSN)
qp->r_psn = attr->rq_psn & rdi->dparms.psn_modify_mask;
if (attr_mask & IB_QP_ACCESS_FLAGS)
qp->qp_access_flags = attr->qp_access_flags;
if (attr_mask & IB_QP_AV) {
qp->remote_ah_attr = attr->ah_attr;
qp->s_srate = attr->ah_attr.static_rate;
qp->srate_mbps = ib_rate_to_mbps(qp->s_srate);
}
if (attr_mask & IB_QP_ALT_PATH) {
qp->alt_ah_attr = attr->alt_ah_attr;
qp->s_alt_pkey_index = attr->alt_pkey_index;
}
if (attr_mask & IB_QP_PATH_MIG_STATE) {
qp->s_mig_state = attr->path_mig_state;
if (mig) {
qp->remote_ah_attr = qp->alt_ah_attr;
qp->port_num = qp->alt_ah_attr.port_num;
qp->s_pkey_index = qp->s_alt_pkey_index;
}
}
if (attr_mask & IB_QP_PATH_MTU) {
qp->pmtu = rdi->driver_f.mtu_from_qp(rdi, qp, pmtu);
qp->path_mtu = rdi->driver_f.mtu_to_path_mtu(qp->pmtu);
qp->log_pmtu = ilog2(qp->pmtu);
}
if (attr_mask & IB_QP_RETRY_CNT) {
qp->s_retry_cnt = attr->retry_cnt;
qp->s_retry = attr->retry_cnt;
}
if (attr_mask & IB_QP_RNR_RETRY) {
qp->s_rnr_retry_cnt = attr->rnr_retry;
qp->s_rnr_retry = attr->rnr_retry;
}
if (attr_mask & IB_QP_MIN_RNR_TIMER)
qp->r_min_rnr_timer = attr->min_rnr_timer;
if (attr_mask & IB_QP_TIMEOUT) {
qp->timeout = attr->timeout;
qp->timeout_jiffies =
usecs_to_jiffies((4096UL * (1UL << qp->timeout)) /
1000UL);
}
if (attr_mask & IB_QP_QKEY)
qp->qkey = attr->qkey;
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
qp->r_max_rd_atomic = attr->max_dest_rd_atomic;
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
qp->s_max_rd_atomic = attr->max_rd_atomic;
if (rdi->driver_f.modify_qp)
rdi->driver_f.modify_qp(qp, attr, attr_mask, udata);
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
rvt_insert_qp(rdi, qp);
if (lastwqe) {
ev.device = qp->ibqp.device;
ev.element.qp = &qp->ibqp;
ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
}
if (mig) {
ev.device = qp->ibqp.device;
ev.element.qp = &qp->ibqp;
ev.event = IB_EVENT_PATH_MIG;
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
}
return 0;
inval:
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
return -EINVAL;
}
