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Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_qp.c')
-rw-r--r--drivers/infiniband/sw/rxe/rxe_qp.c848
1 files changed, 848 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
new file mode 100644
index 000000000..709c63e97
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <rdma/uverbs_ioctl.h>
+
+#include "rxe.h"
+#include "rxe_loc.h"
+#include "rxe_queue.h"
+#include "rxe_task.h"
+
+static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
+ int has_srq)
+{
+ if (cap->max_send_wr > rxe->attr.max_qp_wr) {
+ pr_debug("invalid send wr = %u > %d\n",
+ cap->max_send_wr, rxe->attr.max_qp_wr);
+ goto err1;
+ }
+
+ if (cap->max_send_sge > rxe->attr.max_send_sge) {
+ pr_debug("invalid send sge = %u > %d\n",
+ cap->max_send_sge, rxe->attr.max_send_sge);
+ goto err1;
+ }
+
+ if (!has_srq) {
+ if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
+ pr_debug("invalid recv wr = %u > %d\n",
+ cap->max_recv_wr, rxe->attr.max_qp_wr);
+ goto err1;
+ }
+
+ if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
+ pr_debug("invalid recv sge = %u > %d\n",
+ cap->max_recv_sge, rxe->attr.max_recv_sge);
+ goto err1;
+ }
+ }
+
+ if (cap->max_inline_data > rxe->max_inline_data) {
+ pr_debug("invalid max inline data = %u > %d\n",
+ cap->max_inline_data, rxe->max_inline_data);
+ goto err1;
+ }
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
+{
+ struct ib_qp_cap *cap = &init->cap;
+ struct rxe_port *port;
+ int port_num = init->port_num;
+
+ switch (init->qp_type) {
+ case IB_QPT_GSI:
+ case IB_QPT_RC:
+ case IB_QPT_UC:
+ case IB_QPT_UD:
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ if (!init->recv_cq || !init->send_cq) {
+ pr_debug("missing cq\n");
+ goto err1;
+ }
+
+ if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
+ goto err1;
+
+ if (init->qp_type == IB_QPT_GSI) {
+ if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
+ pr_debug("invalid port = %d\n", port_num);
+ goto err1;
+ }
+
+ port = &rxe->port;
+
+ if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
+ pr_debug("GSI QP exists for port %d\n", port_num);
+ goto err1;
+ }
+ }
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
+{
+ qp->resp.res_head = 0;
+ qp->resp.res_tail = 0;
+ qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
+
+ if (!qp->resp.resources)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void free_rd_atomic_resources(struct rxe_qp *qp)
+{
+ if (qp->resp.resources) {
+ int i;
+
+ for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
+ struct resp_res *res = &qp->resp.resources[i];
+
+ free_rd_atomic_resource(res);
+ }
+ kfree(qp->resp.resources);
+ qp->resp.resources = NULL;
+ }
+}
+
+void free_rd_atomic_resource(struct resp_res *res)
+{
+ res->type = 0;
+}
+
+static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
+{
+ int i;
+ struct resp_res *res;
+
+ if (qp->resp.resources) {
+ for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
+ res = &qp->resp.resources[i];
+ free_rd_atomic_resource(res);
+ }
+ }
+}
+
+static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
+ struct ib_qp_init_attr *init)
+{
+ struct rxe_port *port;
+ u32 qpn;
+
+ qp->sq_sig_type = init->sq_sig_type;
+ qp->attr.path_mtu = 1;
+ qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu);
+
+ qpn = qp->elem.index;
+ port = &rxe->port;
+
+ switch (init->qp_type) {
+ case IB_QPT_GSI:
+ qp->ibqp.qp_num = 1;
+ port->qp_gsi_index = qpn;
+ qp->attr.port_num = init->port_num;
+ break;
+
+ default:
+ qp->ibqp.qp_num = qpn;
+ break;
+ }
+
+ spin_lock_init(&qp->state_lock);
+
+ spin_lock_init(&qp->req.task.state_lock);
+ spin_lock_init(&qp->resp.task.state_lock);
+ spin_lock_init(&qp->comp.task.state_lock);
+
+ spin_lock_init(&qp->sq.sq_lock);
+ spin_lock_init(&qp->rq.producer_lock);
+ spin_lock_init(&qp->rq.consumer_lock);
+
+ skb_queue_head_init(&qp->req_pkts);
+ skb_queue_head_init(&qp->resp_pkts);
+
+ atomic_set(&qp->ssn, 0);
+ atomic_set(&qp->skb_out, 0);
+}
+
+static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
+ struct ib_qp_init_attr *init, struct ib_udata *udata,
+ struct rxe_create_qp_resp __user *uresp)
+{
+ int err;
+ int wqe_size;
+ enum queue_type type;
+
+ err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
+ if (err < 0)
+ return err;
+ qp->sk->sk->sk_user_data = qp;
+
+ /* pick a source UDP port number for this QP based on
+ * the source QPN. this spreads traffic for different QPs
+ * across different NIC RX queues (while using a single
+ * flow for a given QP to maintain packet order).
+ * the port number must be in the Dynamic Ports range
+ * (0xc000 - 0xffff).
+ */
+ qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff);
+ qp->sq.max_wr = init->cap.max_send_wr;
+
+ /* These caps are limited by rxe_qp_chk_cap() done by the caller */
+ wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
+ init->cap.max_inline_data);
+ qp->sq.max_sge = init->cap.max_send_sge =
+ wqe_size / sizeof(struct ib_sge);
+ qp->sq.max_inline = init->cap.max_inline_data = wqe_size;
+ wqe_size += sizeof(struct rxe_send_wqe);
+
+ type = QUEUE_TYPE_FROM_CLIENT;
+ qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr,
+ wqe_size, type);
+ if (!qp->sq.queue)
+ return -ENOMEM;
+
+ err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
+ qp->sq.queue->buf, qp->sq.queue->buf_size,
+ &qp->sq.queue->ip);
+
+ if (err) {
+ vfree(qp->sq.queue->buf);
+ kfree(qp->sq.queue);
+ qp->sq.queue = NULL;
+ return err;
+ }
+
+ qp->req.wqe_index = queue_get_producer(qp->sq.queue,
+ QUEUE_TYPE_FROM_CLIENT);
+
+ qp->req.state = QP_STATE_RESET;
+ qp->comp.state = QP_STATE_RESET;
+ qp->req.opcode = -1;
+ qp->comp.opcode = -1;
+
+ rxe_init_task(&qp->req.task, qp, rxe_requester);
+ rxe_init_task(&qp->comp.task, qp, rxe_completer);
+
+ qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
+ if (init->qp_type == IB_QPT_RC) {
+ timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
+ timer_setup(&qp->retrans_timer, retransmit_timer, 0);
+ }
+ return 0;
+}
+
+static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
+ struct ib_qp_init_attr *init,
+ struct ib_udata *udata,
+ struct rxe_create_qp_resp __user *uresp)
+{
+ int err;
+ int wqe_size;
+ enum queue_type type;
+
+ if (!qp->srq) {
+ qp->rq.max_wr = init->cap.max_recv_wr;
+ qp->rq.max_sge = init->cap.max_recv_sge;
+
+ wqe_size = rcv_wqe_size(qp->rq.max_sge);
+
+ pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
+ qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
+
+ type = QUEUE_TYPE_FROM_CLIENT;
+ qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr,
+ wqe_size, type);
+ if (!qp->rq.queue)
+ return -ENOMEM;
+
+ err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
+ qp->rq.queue->buf, qp->rq.queue->buf_size,
+ &qp->rq.queue->ip);
+ if (err) {
+ vfree(qp->rq.queue->buf);
+ kfree(qp->rq.queue);
+ qp->rq.queue = NULL;
+ return err;
+ }
+ }
+
+ rxe_init_task(&qp->resp.task, qp, rxe_responder);
+
+ qp->resp.opcode = OPCODE_NONE;
+ qp->resp.msn = 0;
+ qp->resp.state = QP_STATE_RESET;
+
+ return 0;
+}
+
+/* called by the create qp verb */
+int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
+ struct ib_qp_init_attr *init,
+ struct rxe_create_qp_resp __user *uresp,
+ struct ib_pd *ibpd,
+ struct ib_udata *udata)
+{
+ int err;
+ struct rxe_cq *rcq = to_rcq(init->recv_cq);
+ struct rxe_cq *scq = to_rcq(init->send_cq);
+ struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
+
+ rxe_get(pd);
+ rxe_get(rcq);
+ rxe_get(scq);
+ if (srq)
+ rxe_get(srq);
+
+ qp->pd = pd;
+ qp->rcq = rcq;
+ qp->scq = scq;
+ qp->srq = srq;
+
+ atomic_inc(&rcq->num_wq);
+ atomic_inc(&scq->num_wq);
+
+ rxe_qp_init_misc(rxe, qp, init);
+
+ err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
+ if (err)
+ goto err1;
+
+ err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
+ if (err)
+ goto err2;
+
+ qp->attr.qp_state = IB_QPS_RESET;
+ qp->valid = 1;
+
+ return 0;
+
+err2:
+ rxe_queue_cleanup(qp->sq.queue);
+ qp->sq.queue = NULL;
+err1:
+ atomic_dec(&rcq->num_wq);
+ atomic_dec(&scq->num_wq);
+
+ qp->pd = NULL;
+ qp->rcq = NULL;
+ qp->scq = NULL;
+ qp->srq = NULL;
+
+ if (srq)
+ rxe_put(srq);
+ rxe_put(scq);
+ rxe_put(rcq);
+ rxe_put(pd);
+
+ return err;
+}
+
+/* called by the query qp verb */
+int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
+{
+ init->event_handler = qp->ibqp.event_handler;
+ init->qp_context = qp->ibqp.qp_context;
+ init->send_cq = qp->ibqp.send_cq;
+ init->recv_cq = qp->ibqp.recv_cq;
+ init->srq = qp->ibqp.srq;
+
+ init->cap.max_send_wr = qp->sq.max_wr;
+ init->cap.max_send_sge = qp->sq.max_sge;
+ init->cap.max_inline_data = qp->sq.max_inline;
+
+ if (!qp->srq) {
+ init->cap.max_recv_wr = qp->rq.max_wr;
+ init->cap.max_recv_sge = qp->rq.max_sge;
+ }
+
+ init->sq_sig_type = qp->sq_sig_type;
+
+ init->qp_type = qp->ibqp.qp_type;
+ init->port_num = 1;
+
+ return 0;
+}
+
+/* called by the modify qp verb, this routine checks all the parameters before
+ * making any changes
+ */
+int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
+ struct ib_qp_attr *attr, int mask)
+{
+ enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
+ attr->cur_qp_state : qp->attr.qp_state;
+ enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
+ attr->qp_state : cur_state;
+
+ if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
+ pr_debug("invalid mask or state for qp\n");
+ goto err1;
+ }
+
+ if (mask & IB_QP_STATE) {
+ if (cur_state == IB_QPS_SQD) {
+ if (qp->req.state == QP_STATE_DRAIN &&
+ new_state != IB_QPS_ERR)
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_PORT) {
+ if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
+ pr_debug("invalid port %d\n", attr->port_num);
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
+ goto err1;
+
+ if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
+ goto err1;
+
+ if (mask & IB_QP_ALT_PATH) {
+ if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
+ goto err1;
+ if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) {
+ pr_debug("invalid alt port %d\n", attr->alt_port_num);
+ goto err1;
+ }
+ if (attr->alt_timeout > 31) {
+ pr_debug("invalid QP alt timeout %d > 31\n",
+ attr->alt_timeout);
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_PATH_MTU) {
+ struct rxe_port *port = &rxe->port;
+
+ enum ib_mtu max_mtu = port->attr.max_mtu;
+ enum ib_mtu mtu = attr->path_mtu;
+
+ if (mtu > max_mtu) {
+ pr_debug("invalid mtu (%d) > (%d)\n",
+ ib_mtu_enum_to_int(mtu),
+ ib_mtu_enum_to_int(max_mtu));
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
+ if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
+ pr_debug("invalid max_rd_atomic %d > %d\n",
+ attr->max_rd_atomic,
+ rxe->attr.max_qp_rd_atom);
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_TIMEOUT) {
+ if (attr->timeout > 31) {
+ pr_debug("invalid QP timeout %d > 31\n", attr->timeout);
+ goto err1;
+ }
+ }
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+/* move the qp to the reset state */
+static void rxe_qp_reset(struct rxe_qp *qp)
+{
+ /* stop tasks from running */
+ rxe_disable_task(&qp->resp.task);
+
+ /* stop request/comp */
+ if (qp->sq.queue) {
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_disable_task(&qp->comp.task);
+ rxe_disable_task(&qp->req.task);
+ }
+
+ /* move qp to the reset state */
+ qp->req.state = QP_STATE_RESET;
+ qp->comp.state = QP_STATE_RESET;
+ qp->resp.state = QP_STATE_RESET;
+
+ /* let state machines reset themselves drain work and packet queues
+ * etc.
+ */
+ __rxe_do_task(&qp->resp.task);
+
+ if (qp->sq.queue) {
+ __rxe_do_task(&qp->comp.task);
+ __rxe_do_task(&qp->req.task);
+ rxe_queue_reset(qp->sq.queue);
+ }
+
+ /* cleanup attributes */
+ atomic_set(&qp->ssn, 0);
+ qp->req.opcode = -1;
+ qp->req.need_retry = 0;
+ qp->req.wait_for_rnr_timer = 0;
+ qp->req.noack_pkts = 0;
+ qp->resp.msn = 0;
+ qp->resp.opcode = -1;
+ qp->resp.drop_msg = 0;
+ qp->resp.goto_error = 0;
+ qp->resp.sent_psn_nak = 0;
+
+ if (qp->resp.mr) {
+ rxe_put(qp->resp.mr);
+ qp->resp.mr = NULL;
+ }
+
+ cleanup_rd_atomic_resources(qp);
+
+ /* reenable tasks */
+ rxe_enable_task(&qp->resp.task);
+
+ if (qp->sq.queue) {
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_enable_task(&qp->comp.task);
+
+ rxe_enable_task(&qp->req.task);
+ }
+}
+
+/* drain the send queue */
+static void rxe_qp_drain(struct rxe_qp *qp)
+{
+ if (qp->sq.queue) {
+ if (qp->req.state != QP_STATE_DRAINED) {
+ qp->req.state = QP_STATE_DRAIN;
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_sched_task(&qp->comp.task);
+ else
+ __rxe_do_task(&qp->comp.task);
+ rxe_sched_task(&qp->req.task);
+ }
+ }
+}
+
+/* move the qp to the error state */
+void rxe_qp_error(struct rxe_qp *qp)
+{
+ qp->req.state = QP_STATE_ERROR;
+ qp->resp.state = QP_STATE_ERROR;
+ qp->comp.state = QP_STATE_ERROR;
+ qp->attr.qp_state = IB_QPS_ERR;
+
+ /* drain work and packet queues */
+ rxe_sched_task(&qp->resp.task);
+
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_sched_task(&qp->comp.task);
+ else
+ __rxe_do_task(&qp->comp.task);
+ rxe_sched_task(&qp->req.task);
+}
+
+/* called by the modify qp verb */
+int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
+ struct ib_udata *udata)
+{
+ int err;
+
+ if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
+ int max_rd_atomic = attr->max_rd_atomic ?
+ roundup_pow_of_two(attr->max_rd_atomic) : 0;
+
+ qp->attr.max_rd_atomic = max_rd_atomic;
+ atomic_set(&qp->req.rd_atomic, max_rd_atomic);
+ }
+
+ if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+ int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
+ roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
+
+ qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
+
+ free_rd_atomic_resources(qp);
+
+ err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
+ if (err)
+ return err;
+ }
+
+ if (mask & IB_QP_CUR_STATE)
+ qp->attr.cur_qp_state = attr->qp_state;
+
+ if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
+ qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
+
+ if (mask & IB_QP_ACCESS_FLAGS)
+ qp->attr.qp_access_flags = attr->qp_access_flags;
+
+ if (mask & IB_QP_PKEY_INDEX)
+ qp->attr.pkey_index = attr->pkey_index;
+
+ if (mask & IB_QP_PORT)
+ qp->attr.port_num = attr->port_num;
+
+ if (mask & IB_QP_QKEY)
+ qp->attr.qkey = attr->qkey;
+
+ if (mask & IB_QP_AV)
+ rxe_init_av(&attr->ah_attr, &qp->pri_av);
+
+ if (mask & IB_QP_ALT_PATH) {
+ rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
+ qp->attr.alt_port_num = attr->alt_port_num;
+ qp->attr.alt_pkey_index = attr->alt_pkey_index;
+ qp->attr.alt_timeout = attr->alt_timeout;
+ }
+
+ if (mask & IB_QP_PATH_MTU) {
+ qp->attr.path_mtu = attr->path_mtu;
+ qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
+ }
+
+ if (mask & IB_QP_TIMEOUT) {
+ qp->attr.timeout = attr->timeout;
+ if (attr->timeout == 0) {
+ qp->qp_timeout_jiffies = 0;
+ } else {
+ /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
+ int j = nsecs_to_jiffies(4096ULL << attr->timeout);
+
+ qp->qp_timeout_jiffies = j ? j : 1;
+ }
+ }
+
+ if (mask & IB_QP_RETRY_CNT) {
+ qp->attr.retry_cnt = attr->retry_cnt;
+ qp->comp.retry_cnt = attr->retry_cnt;
+ pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
+ attr->retry_cnt);
+ }
+
+ if (mask & IB_QP_RNR_RETRY) {
+ qp->attr.rnr_retry = attr->rnr_retry;
+ qp->comp.rnr_retry = attr->rnr_retry;
+ pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
+ attr->rnr_retry);
+ }
+
+ if (mask & IB_QP_RQ_PSN) {
+ qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
+ qp->resp.psn = qp->attr.rq_psn;
+ pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
+ qp->resp.psn);
+ }
+
+ if (mask & IB_QP_MIN_RNR_TIMER) {
+ qp->attr.min_rnr_timer = attr->min_rnr_timer;
+ pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
+ attr->min_rnr_timer);
+ }
+
+ if (mask & IB_QP_SQ_PSN) {
+ qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
+ qp->req.psn = qp->attr.sq_psn;
+ qp->comp.psn = qp->attr.sq_psn;
+ pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
+ }
+
+ if (mask & IB_QP_PATH_MIG_STATE)
+ qp->attr.path_mig_state = attr->path_mig_state;
+
+ if (mask & IB_QP_DEST_QPN)
+ qp->attr.dest_qp_num = attr->dest_qp_num;
+
+ if (mask & IB_QP_STATE) {
+ qp->attr.qp_state = attr->qp_state;
+
+ switch (attr->qp_state) {
+ case IB_QPS_RESET:
+ pr_debug("qp#%d state -> RESET\n", qp_num(qp));
+ rxe_qp_reset(qp);
+ break;
+
+ case IB_QPS_INIT:
+ pr_debug("qp#%d state -> INIT\n", qp_num(qp));
+ qp->req.state = QP_STATE_INIT;
+ qp->resp.state = QP_STATE_INIT;
+ qp->comp.state = QP_STATE_INIT;
+ break;
+
+ case IB_QPS_RTR:
+ pr_debug("qp#%d state -> RTR\n", qp_num(qp));
+ qp->resp.state = QP_STATE_READY;
+ break;
+
+ case IB_QPS_RTS:
+ pr_debug("qp#%d state -> RTS\n", qp_num(qp));
+ qp->req.state = QP_STATE_READY;
+ qp->comp.state = QP_STATE_READY;
+ break;
+
+ case IB_QPS_SQD:
+ pr_debug("qp#%d state -> SQD\n", qp_num(qp));
+ rxe_qp_drain(qp);
+ break;
+
+ case IB_QPS_SQE:
+ pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
+ /* Not possible from modify_qp. */
+ break;
+
+ case IB_QPS_ERR:
+ pr_debug("qp#%d state -> ERR\n", qp_num(qp));
+ rxe_qp_error(qp);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/* called by the query qp verb */
+int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
+{
+ *attr = qp->attr;
+
+ attr->rq_psn = qp->resp.psn;
+ attr->sq_psn = qp->req.psn;
+
+ attr->cap.max_send_wr = qp->sq.max_wr;
+ attr->cap.max_send_sge = qp->sq.max_sge;
+ attr->cap.max_inline_data = qp->sq.max_inline;
+
+ if (!qp->srq) {
+ attr->cap.max_recv_wr = qp->rq.max_wr;
+ attr->cap.max_recv_sge = qp->rq.max_sge;
+ }
+
+ rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
+ rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
+
+ if (qp->req.state == QP_STATE_DRAIN) {
+ attr->sq_draining = 1;
+ /* applications that get this state
+ * typically spin on it. yield the
+ * processor
+ */
+ cond_resched();
+ } else {
+ attr->sq_draining = 0;
+ }
+
+ pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
+
+ return 0;
+}
+
+int rxe_qp_chk_destroy(struct rxe_qp *qp)
+{
+ /* See IBA o10-2.2.3
+ * An attempt to destroy a QP while attached to a mcast group
+ * will fail immediately.
+ */
+ if (atomic_read(&qp->mcg_num)) {
+ pr_debug("Attempt to destroy QP while attached to multicast group\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/* called when the last reference to the qp is dropped */
+static void rxe_qp_do_cleanup(struct work_struct *work)
+{
+ struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
+
+ qp->valid = 0;
+ qp->qp_timeout_jiffies = 0;
+ rxe_cleanup_task(&qp->resp.task);
+
+ if (qp_type(qp) == IB_QPT_RC) {
+ del_timer_sync(&qp->retrans_timer);
+ del_timer_sync(&qp->rnr_nak_timer);
+ }
+
+ if (qp->req.task.func)
+ rxe_cleanup_task(&qp->req.task);
+
+ if (qp->comp.task.func)
+ rxe_cleanup_task(&qp->comp.task);
+
+ /* flush out any receive wr's or pending requests */
+ if (qp->req.task.func)
+ __rxe_do_task(&qp->req.task);
+
+ if (qp->sq.queue) {
+ __rxe_do_task(&qp->comp.task);
+ __rxe_do_task(&qp->req.task);
+ }
+
+ if (qp->sq.queue)
+ rxe_queue_cleanup(qp->sq.queue);
+
+ if (qp->srq)
+ rxe_put(qp->srq);
+
+ if (qp->rq.queue)
+ rxe_queue_cleanup(qp->rq.queue);
+
+ if (qp->scq) {
+ atomic_dec(&qp->scq->num_wq);
+ rxe_put(qp->scq);
+ }
+
+ if (qp->rcq) {
+ atomic_dec(&qp->rcq->num_wq);
+ rxe_put(qp->rcq);
+ }
+
+ if (qp->pd)
+ rxe_put(qp->pd);
+
+ if (qp->resp.mr)
+ rxe_put(qp->resp.mr);
+
+ free_rd_atomic_resources(qp);
+
+ if (qp->sk) {
+ if (qp_type(qp) == IB_QPT_RC)
+ sk_dst_reset(qp->sk->sk);
+
+ kernel_sock_shutdown(qp->sk, SHUT_RDWR);
+ sock_release(qp->sk);
+ }
+}
+
+/* called when the last reference to the qp is dropped */
+void rxe_qp_cleanup(struct rxe_pool_elem *elem)
+{
+ struct rxe_qp *qp = container_of(elem, typeof(*qp), elem);
+
+ execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
+}