[PATCH rdma-next 16/29] IB/rxe: Queue Pair (QP) handling

Moni Shoua
2016-06-02T16:57:24Z

Implementation of queue pair logic in Soft RoCE.

Signed-off-by: Kamal Heib <kamalh-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Amir Vadai <amirv-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
drivers/infiniband/hw/rxe/rxe_qp.c | 851 +++++++++++++++++++++++++++++++++++++
1 file changed, 851 insertions(+)
create mode 100644 drivers/infiniband/hw/rxe/rxe_qp.c

diff --git a/drivers/infiniband/hw/rxe/rxe_qp.c b/drivers/infiniband/hw/rxe/rxe_qp.c
new file mode 100644
index 0000000..aa11ac3
--- /dev/null
+++ b/drivers/infiniband/hw/rxe/rxe_qp.c
@@ -0,0 +1,851 @@
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+
+#include "rxe.h"
+#include "rxe_loc.h"
+#include "rxe_queue.h"
+#include "rxe_task.h"
+
+char *rxe_qp_state_name[] = {
+ [QP_STATE_RESET] = "RESET",
+ [QP_STATE_INIT] = "INIT",
+ [QP_STATE_READY] = "READY",
+ [QP_STATE_DRAIN] = "DRAIN",
+ [QP_STATE_DRAINED] = "DRAINED",
+ [QP_STATE_ERROR] = "ERROR",
+};
+
+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_warn("invalid send wr = %d > %d\n",
+ cap->max_send_wr, rxe->attr.max_qp_wr);
+ goto err1;
+ }
+
+ if (cap->max_send_sge > rxe->attr.max_sge) {
+ pr_warn("invalid send sge = %d > %d\n",
+ cap->max_send_sge, rxe->attr.max_sge);
+ goto err1;
+ }
+
+ if (!has_srq) {
+ if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
+ pr_warn("invalid recv wr = %d > %d\n",
+ cap->max_recv_wr, rxe->attr.max_qp_wr);
+ goto err1;
+ }
+
+ if (cap->max_recv_sge > rxe->attr.max_sge) {
+ pr_warn("invalid recv sge = %d > %d\n",
+ cap->max_recv_sge, rxe->attr.max_sge);
+ goto err1;
+ }
+ }
+
+ if (cap->max_inline_data > rxe->max_inline_data) {
+ pr_warn("invalid max inline data = %d > %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;
+
+ if (!init->recv_cq || !init->send_cq) {
+ pr_warn("missing cq\n");
+ goto err1;
+ }
+
+ if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
+ goto err1;
+
+ if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
+ if (port_num < 1 || port_num > rxe->num_ports) {
+ pr_warn("invalid port = %d\n", port_num);
+ goto err1;
+ }
+
+ port = &rxe->port[port_num - 1];
+
+ if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
+ pr_warn("SMI QP exists for port %d\n", port_num);
+ goto err1;
+ }
+
+ if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
+ pr_warn("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_rd_atomic; i++) {
+ struct resp_res *res = &qp->resp.resources[i];
+
+ free_rd_atomic_resource(qp, res);
+ }
+ kfree(qp->resp.resources);
+ qp->resp.resources = NULL;
+ }
+}
+
+void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
+{
+ if (res->type == RXE_ATOMIC_MASK) {
+ rxe_drop_ref(qp);
+ kfree_skb(res->atomic.skb);
+ } else if (res->type == RXE_READ_MASK) {
+ if (res->read.mr)
+ rxe_drop_ref(res->read.mr);
+ }
+ 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_rd_atomic; i++) {
+ res = &qp->resp.resources[i];
+ free_rd_atomic_resource(qp, 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->pelem.index;
+ port = &rxe->port[init->port_num - 1];
+
+ switch (init->qp_type) {
+ case IB_QPT_SMI:
+ qp->ibqp.qp_num = 0;
+ port->qp_smi_index = qpn;
+ qp->attr.port_num = init->port_num;
+ break;
+
+ 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;
+ }
+
+ INIT_LIST_HEAD(&qp->grp_list);
+
+ skb_queue_head_init(&qp->send_pkts);
+
+ spin_lock_init(&qp->grp_lock);
+ spin_lock_init(&qp->state_lock);
+
+ 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_ucontext *context, struct ib_udata *udata)
+{
+ int err;
+ int wqe_size;
+
+ 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;
+
+ qp->sq.max_wr = init->cap.max_send_wr;
+ qp->sq.max_sge = init->cap.max_send_sge;
+ qp->sq.max_inline = init->cap.max_inline_data;
+
+ wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
+ qp->sq.max_sge * sizeof(struct ib_sge),
+ sizeof(struct rxe_send_wqe) +
+ qp->sq.max_inline);
+
+ qp->sq.queue = rxe_queue_init(rxe,
+ &qp->sq.max_wr,
+ wqe_size);
+ if (!qp->sq.queue)
+ return -ENOMEM;
+
+ err = do_mmap_info(rxe, udata, true,
+ context, qp->sq.queue->buf,
+ qp->sq.queue->buf_size, &qp->sq.queue->ip);
+
+ if (err) {
+ kvfree(qp->sq.queue->buf);
+ kfree(qp->sq.queue);
+ return err;
+ }
+
+ qp->req.wqe_index = producer_index(qp->sq.queue);
+ qp->req.state = QP_STATE_RESET;
+ qp->req.opcode = -1;
+ qp->comp.opcode = -1;
+
+ spin_lock_init(&qp->sq.sq_lock);
+ skb_queue_head_init(&qp->req_pkts);
+
+ rxe_init_task(rxe, &qp->req.task, qp,
+ rxe_requester, "req");
+ rxe_init_task(rxe, &qp->comp.task, qp,
+ rxe_completer, "comp");
+
+ init_timer(&qp->rnr_nak_timer);
+ qp->rnr_nak_timer.function = rnr_nak_timer;
+ qp->rnr_nak_timer.data = (unsigned long)qp;
+
+ init_timer(&qp->retrans_timer);
+ qp->retrans_timer.function = retransmit_timer;
+ qp->retrans_timer.data = (unsigned long)qp;
+ qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
+
+ return 0;
+}
+
+static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
+ struct ib_qp_init_attr *init,
+ struct ib_ucontext *context, struct ib_udata *udata)
+{
+ int err;
+ int wqe_size;
+
+ 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("max_wr = %d, max_sge = %d, wqe_size = %d\n",
+ qp->rq.max_wr, qp->rq.max_sge, wqe_size);
+
+ qp->rq.queue = rxe_queue_init(rxe,
+ &qp->rq.max_wr,
+ wqe_size);
+ if (!qp->rq.queue)
+ return -ENOMEM;
+
+ err = do_mmap_info(rxe, udata, false, context,
+ qp->rq.queue->buf,
+ qp->rq.queue->buf_size,
+ &qp->rq.queue->ip);
+ if (err) {
+ kvfree(qp->rq.queue->buf);
+ kfree(qp->rq.queue);
+ return err;
+ }
+ }
+
+ spin_lock_init(&qp->rq.producer_lock);
+ spin_lock_init(&qp->rq.consumer_lock);
+
+ skb_queue_head_init(&qp->resp_pkts);
+
+ rxe_init_task(rxe, &qp->resp.task, qp,
+ rxe_responder, "resp");
+
+ 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 ib_udata *udata,
+ struct ib_pd *ibpd)
+{
+ 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;
+ struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
+
+ rxe_add_ref(pd);
+ rxe_add_ref(rcq);
+ rxe_add_ref(scq);
+ if (srq)
+ rxe_add_ref(srq);
+
+ qp->pd = pd;
+ qp->rcq = rcq;
+ qp->scq = scq;
+ qp->srq = srq;
+
+ rxe_qp_init_misc(rxe, qp, init);
+
+ err = rxe_qp_init_req(rxe, qp, init, context, udata);
+ if (err)
+ goto err1;
+
+ err = rxe_qp_init_resp(rxe, qp, init, context, udata);
+ if (err)
+ goto err2;
+
+ qp->attr.qp_state = IB_QPS_RESET;
+ qp->valid = 1;
+
+ return 0;
+
+err2:
+ rxe_queue_cleanup(qp->sq.queue);
+err1:
+ if (srq)
+ rxe_drop_ref(srq);
+ rxe_drop_ref(scq);
+ rxe_drop_ref(rcq);
+ rxe_drop_ref(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,
+ IB_LINK_LAYER_ETHERNET)) {
+ pr_warn("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 (attr->port_num < 1 || attr->port_num > rxe->num_ports) {
+ pr_warn("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 (attr->alt_port_num < 1 || attr->alt_port_num > rxe->num_ports) {
+ pr_warn("invalid alt port %d\n", attr->alt_port_num);
+ goto err1;
+ }
+ if (attr->alt_timeout > 31) {
+ pr_warn("invalid QP alt timeout %d > 31\n",
+ attr->alt_timeout);
+ goto err1;
+ }
+ }
+
+ if (mask & IB_QP_PATH_MTU) {
+ struct rxe_port *port = &rxe->port[qp->attr.port_num - 1];
+
+ 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_warn("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_warn("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->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);
+ }
+
+ /* cleanup attributes */
+ atomic_set(&qp->ssn, 0);
+ qp->req.opcode = -1;
+ qp->req.need_retry = 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_drop_ref(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_run_task(&qp->comp.task, 1);
+ else
+ __rxe_do_task(&qp->comp.task);
+ rxe_run_task(&qp->req.task, 1);
+ }
+ }
+}
+
+/* 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;
+
+ /* drain work and packet queues */
+ rxe_run_task(&qp->resp.task, 1);
+
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_run_task(&qp->comp.task, 1);
+ else
+ __rxe_do_task(&qp->comp.task);
+ rxe_run_task(&qp->req.task, 1);
+}
+
+/* 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;
+ struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
+ union ib_gid sgid;
+ struct ib_gid_attr sgid_attr;
+
+ if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
+ int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
+
+ free_rd_atomic_resources(qp);
+
+ err = alloc_rd_atomic_resources(qp, max_rd_atomic);
+ if (err)
+ return err;
+
+ qp->attr.max_rd_atomic = max_rd_atomic;
+ atomic_set(&qp->req.rd_atomic, max_rd_atomic);
+ }
+
+ 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) {
+ ib_get_cached_gid(&rxe->ib_dev, 1,
+ attr->ah_attr.grh.sgid_index, &sgid,
+ &sgid_attr);
+ rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
+ &attr->ah_attr);
+ rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
+ &sgid_attr, &sgid);
+ if (sgid_attr.ndev)
+ dev_put(sgid_attr.ndev);
+ }
+
+ if (mask & IB_QP_ALT_PATH) {
+ ib_get_cached_gid(&rxe->ib_dev, 1,
+ attr->alt_ah_attr.grh.sgid_index, &sgid,
+ &sgid_attr);
+
+ rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
+ &attr->alt_ah_attr);
+ rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr,
+ &sgid_attr, &sgid);
+ if (sgid_attr.ndev)
+ dev_put(sgid_attr.ndev);
+
+ 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 = usecs_to_jiffies((4096ULL << attr->timeout) / 1000);
+
+ 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("set retry count = %d\n", 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("set rnr retry count = %d\n", 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("set resp psn = 0x%x\n", qp->resp.psn);
+ }
+
+ if (mask & IB_QP_MIN_RNR_TIMER) {
+ qp->attr.min_rnr_timer = attr->min_rnr_timer;
+ pr_debug("set min rnr timer = 0x%x\n",
+ 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("set req psn = 0x%x\n", qp->req.psn);
+ }
+
+ if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+ qp->attr.max_dest_rd_atomic =
+ __roundup_pow_of_two(attr->max_dest_rd_atomic);
+ }
+
+ 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 state -> RESET\n");
+ rxe_qp_reset(qp);
+ break;
+
+ case IB_QPS_INIT:
+ pr_debug("qp state -> INIT\n");
+ qp->req.state = QP_STATE_INIT;
+ qp->resp.state = QP_STATE_INIT;
+ break;
+
+ case IB_QPS_RTR:
+ pr_debug("qp state -> RTR\n");
+ qp->resp.state = QP_STATE_READY;
+ break;
+
+ case IB_QPS_RTS:
+ pr_debug("qp state -> RTS\n");
+ qp->req.state = QP_STATE_READY;
+ break;
+
+ case IB_QPS_SQD:
+ pr_debug("qp state -> SQD\n");
+ rxe_qp_drain(qp);
+ break;
+
+ case IB_QPS_SQE:
+ pr_warn("qp state -> SQE !!?\n");
+ /* Not possible from modify_qp. */
+ break;
+
+ case IB_QPS_ERR:
+ pr_debug("qp state -> ERR\n");
+ 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)
+{
+ struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
+
+ *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(rxe, &qp->pri_av, &attr->ah_attr);
+ rxe_av_to_attr(rxe, &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;
+}
+
+/* called by the destroy qp verb */
+void rxe_qp_destroy(struct rxe_qp *qp)
+{
+ qp->valid = 0;
+ qp->qp_timeout_jiffies = 0;
+ rxe_cleanup_task(&qp->resp.task);
+
+ del_timer_sync(&qp->retrans_timer);
+ del_timer_sync(&qp->rnr_nak_timer);
+
+ rxe_cleanup_task(&qp->req.task);
+ if (qp_type(qp) == IB_QPT_RC)
+ rxe_cleanup_task(&qp->comp.task);
+
+ /* flush out any receive wr's or pending requests */
+ __rxe_do_task(&qp->req.task);
+ if (qp->sq.queue) {
+ __rxe_do_task(&qp->comp.task);
+ __rxe_do_task(&qp->req.task);
+ }
+}
+
+/* called when the last reference to the qp is dropped */
+void rxe_qp_cleanup(void *arg)
+{
+ struct rxe_qp *qp = arg;
+
+ rxe_drop_all_mcast_groups(qp);
+
+ if (qp->sq.queue)
+ rxe_queue_cleanup(qp->sq.queue);
+
+ if (qp->srq)
+ rxe_drop_ref(qp->srq);
+
+ if (qp->rq.queue)
+ rxe_queue_cleanup(qp->rq.queue);
+
+ if (qp->scq)
+ rxe_drop_ref(qp->scq);
+ if (qp->rcq)
+ rxe_drop_ref(qp->rcq);
+ if (qp->pd)
+ rxe_drop_ref(qp->pd);
+
+ if (qp->resp.mr) {
+ rxe_drop_ref(qp->resp.mr);
+ qp->resp.mr = NULL;
+ }
+
+ free_rd_atomic_resources(qp);
+
+ kernel_sock_shutdown(qp->sk, SHUT_RDWR);
+}
--
1.8.3.1