1 files changed, 452 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/amso1100/c2_cm.c b/drivers/infiniband/hw/amso1100/c2_cm.c
new file mode 100644
index 000000000000..485254efdd1e
--- /dev/null
+++ b/drivers/infiniband/hw/amso1100/c2_cm.c
@@ -0,0 +1,452 @@
+/*
+ * Copyright (c) 2005 Ammasso, Inc.  All rights reserved.
+ * Copyright (c) 2005 Open Grid Computing, 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 "c2.h"
+#include "c2_wr.h"
+#include "c2_vq.h"
+#include <rdma/iw_cm.h>
+
+int c2_llp_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
+{
+        struct c2_dev *c2dev = to_c2dev(cm_id->device);
+        struct ib_qp *ibqp;
+        struct c2_qp *qp;
+        struct c2wr_qp_connect_req *wr; /* variable size needs a malloc. */
+        struct c2_vq_req *vq_req;
+        int err;
+
+        ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
+        if (!ibqp)
+                return -EINVAL;
+        qp = to_c2qp(ibqp);
+
+        /* Associate QP <--> CM_ID */
+        cm_id->provider_data = qp;
+        cm_id->add_ref(cm_id);
+        qp->cm_id = cm_id;
+
+        /*
+         * only support the max private_data length
+         */
+        if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
+                err = -EINVAL;
+                goto bail0;
+        }
+        /*
+         * Set the rdma read limits
+         */
+        err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
+        if (err)
+                goto bail0;
+
+        /*
+         * Create and send a WR_QP_CONNECT...
+         */
+        wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
+        if (!wr) {
+                err = -ENOMEM;
+                goto bail0;
+        }
+
+        vq_req = vq_req_alloc(c2dev);
+        if (!vq_req) {
+                err = -ENOMEM;
+                goto bail1;
+        }
+
+        c2_wr_set_id(wr, CCWR_QP_CONNECT);
+        wr->hdr.context = 0;
+        wr->rnic_handle = c2dev->adapter_handle;
+        wr->qp_handle = qp->adapter_handle;
+
+        wr->remote_addr = cm_id->remote_addr.sin_addr.s_addr;
+        wr->remote_port = cm_id->remote_addr.sin_port;
+
+        /*
+         * Move any private data from the callers's buf into
+         * the WR.
+         */
+        if (iw_param->private_data) {
+                wr->private_data_length =
+                        cpu_to_be32(iw_param->private_data_len);
+                memcpy(&wr->private_data[0], iw_param->private_data,
+                       iw_param->private_data_len);
+        } else
+                wr->private_data_length = 0;
+
+        /*
+         * Send WR to adapter.  NOTE: There is no synch reply from
+         * the adapter.
+         */
+        err = vq_send_wr(c2dev, (union c2wr *) wr);
+        vq_req_free(c2dev, vq_req);
+
+ bail1:
+        kfree(wr);
+ bail0:
+        if (err) {
+                /*
+                 * If we fail, release reference on QP and
+                 * disassociate QP from CM_ID
+                 */
+                cm_id->provider_data = NULL;
+                qp->cm_id = NULL;
+                cm_id->rem_ref(cm_id);
+        }
+        return err;
+}
+
+int c2_llp_service_create(struct iw_cm_id *cm_id, int backlog)
+{
+        struct c2_dev *c2dev;
+        struct c2wr_ep_listen_create_req wr;
+        struct c2wr_ep_listen_create_rep *reply;
+        struct c2_vq_req *vq_req;
+        int err;
+
+        c2dev = to_c2dev(cm_id->device);
+        if (c2dev == NULL)
+                return -EINVAL;
+
+        /*
+         * Allocate verbs request.
+         */
+        vq_req = vq_req_alloc(c2dev);
+        if (!vq_req)
+                return -ENOMEM;
+
+        /*
+         * Build the WR
+         */
+        c2_wr_set_id(&wr, CCWR_EP_LISTEN_CREATE);
+        wr.hdr.context = (u64) (unsigned long) vq_req;
+        wr.rnic_handle = c2dev->adapter_handle;
+        wr.local_addr = cm_id->local_addr.sin_addr.s_addr;
+        wr.local_port = cm_id->local_addr.sin_port;
+        wr.backlog = cpu_to_be32(backlog);
+        wr.user_context = (u64) (unsigned long) cm_id;
+
+        /*
+         * Reference the request struct.  Dereferenced in the int handler.
+         */
+        vq_req_get(c2dev, vq_req);
+
+        /*
+         * Send WR to adapter
+         */
+        err = vq_send_wr(c2dev, (union c2wr *) & wr);
+        if (err) {
+                vq_req_put(c2dev, vq_req);
+                goto bail0;
+        }
+
+        /*
+         * Wait for reply from adapter
+         */
+        err = vq_wait_for_reply(c2dev, vq_req);
+        if (err)
+                goto bail0;
+
+        /*
+         * Process reply
+         */
+        reply =
+            (struct c2wr_ep_listen_create_rep *) (unsigned long) vq_req->reply_msg;
+        if (!reply) {
+                err = -ENOMEM;
+                goto bail1;
+        }
+
+        if ((err = c2_errno(reply)) != 0)
+                goto bail1;
+
+        /*
+         * Keep the adapter handle. Used in subsequent destroy
+         */
+        cm_id->provider_data = (void*)(unsigned long) reply->ep_handle;
+
+        /*
+         * free vq stuff
+         */
+        vq_repbuf_free(c2dev, reply);
+        vq_req_free(c2dev, vq_req);
+
+        return 0;
+
+ bail1:
+        vq_repbuf_free(c2dev, reply);
+ bail0:
+        vq_req_free(c2dev, vq_req);
+        return err;
+}
+
+
+int c2_llp_service_destroy(struct iw_cm_id *cm_id)
+{
+
+        struct c2_dev *c2dev;
+        struct c2wr_ep_listen_destroy_req wr;
+        struct c2wr_ep_listen_destroy_rep *reply;
+        struct c2_vq_req *vq_req;
+        int err;
+
+        c2dev = to_c2dev(cm_id->device);
+        if (c2dev == NULL)
+                return -EINVAL;
+
+        /*
+         * Allocate verbs request.
+         */
+        vq_req = vq_req_alloc(c2dev);
+        if (!vq_req)
+                return -ENOMEM;
+
+        /*
+         * Build the WR
+         */
+        c2_wr_set_id(&wr, CCWR_EP_LISTEN_DESTROY);
+        wr.hdr.context = (unsigned long) vq_req;
+        wr.rnic_handle = c2dev->adapter_handle;
+        wr.ep_handle = (u32)(unsigned long)cm_id->provider_data;
+
+        /*
+         * reference the request struct.  dereferenced in the int handler.
+         */
+        vq_req_get(c2dev, vq_req);
+
+        /*
+         * Send WR to adapter
+         */
+        err = vq_send_wr(c2dev, (union c2wr *) & wr);
+        if (err) {
+                vq_req_put(c2dev, vq_req);
+                goto bail0;
+        }
+
+        /*
+         * Wait for reply from adapter
+         */
+        err = vq_wait_for_reply(c2dev, vq_req);
+        if (err)
+                goto bail0;
+
+        /*
+         * Process reply
+         */
+        reply=(struct c2wr_ep_listen_destroy_rep *)(unsigned long)vq_req->reply_msg;
+        if (!reply) {
+                err = -ENOMEM;
+                goto bail0;
+        }
+        if ((err = c2_errno(reply)) != 0)
+                goto bail1;
+
+ bail1:
+        vq_repbuf_free(c2dev, reply);
+ bail0:
+        vq_req_free(c2dev, vq_req);
+        return err;
+}
+
+int c2_llp_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
+{
+        struct c2_dev *c2dev = to_c2dev(cm_id->device);
+        struct c2_qp *qp;
+        struct ib_qp *ibqp;
+        struct c2wr_cr_accept_req *wr;  /* variable length WR */
+        struct c2_vq_req *vq_req;
+        struct c2wr_cr_accept_rep *reply;       /* VQ Reply msg ptr. */
+        int err;
+
+        ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
+        if (!ibqp)
+                return -EINVAL;
+        qp = to_c2qp(ibqp);
+
+        /* Set the RDMA read limits */
+        err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
+        if (err)
+                goto bail0;
+
+        /* Allocate verbs request. */
+        vq_req = vq_req_alloc(c2dev);
+        if (!vq_req) {
+                err = -ENOMEM;
+                goto bail1;
+        }
+        vq_req->qp = qp;
+        vq_req->cm_id = cm_id;
+        vq_req->event = IW_CM_EVENT_ESTABLISHED;
+
+        wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
+        if (!wr) {
+                err = -ENOMEM;
+                goto bail2;
+        }
+
+        /* Build the WR */
+        c2_wr_set_id(wr, CCWR_CR_ACCEPT);
+        wr->hdr.context = (unsigned long) vq_req;
+        wr->rnic_handle = c2dev->adapter_handle;
+        wr->ep_handle = (u32) (unsigned long) cm_id->provider_data;
+        wr->qp_handle = qp->adapter_handle;
+
+        /* Replace the cr_handle with the QP after accept */
+        cm_id->provider_data = qp;
+        cm_id->add_ref(cm_id);
+        qp->cm_id = cm_id;
+
+        cm_id->provider_data = qp;
+
+        /* Validate private_data length */
+        if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
+                err = -EINVAL;
+                goto bail2;
+        }
+
+        if (iw_param->private_data) {
+                wr->private_data_length = cpu_to_be32(iw_param->private_data_len);
+                memcpy(&wr->private_data[0],
+                       iw_param->private_data, iw_param->private_data_len);
+        } else
+                wr->private_data_length = 0;
+
+        /* Reference the request struct.  Dereferenced in the int handler. */
+        vq_req_get(c2dev, vq_req);
+
+        /* Send WR to adapter */
+        err = vq_send_wr(c2dev, (union c2wr *) wr);
+        if (err) {
+                vq_req_put(c2dev, vq_req);
+                goto bail2;
+        }
+
+        /* Wait for reply from adapter */
+        err = vq_wait_for_reply(c2dev, vq_req);
+        if (err)
+                goto bail2;
+
+        /* Check that reply is present */
+        reply = (struct c2wr_cr_accept_rep *) (unsigned long) vq_req->reply_msg;
+        if (!reply) {
+                err = -ENOMEM;
+                goto bail2;
+        }
+
+        err = c2_errno(reply);
+        vq_repbuf_free(c2dev, reply);
+
+        if (!err)
+                c2_set_qp_state(qp, C2_QP_STATE_RTS);
+ bail2:
+        kfree(wr);
+ bail1:
+        vq_req_free(c2dev, vq_req);
+ bail0:
+        if (err) {
+                /*
+                 * If we fail, release reference on QP and
+                 * disassociate QP from CM_ID
+                 */
+                cm_id->provider_data = NULL;
+                qp->cm_id = NULL;
+                cm_id->rem_ref(cm_id);
+        }
+        return err;
+}
+
+int c2_llp_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+        struct c2_dev *c2dev;
+        struct c2wr_cr_reject_req wr;
+        struct c2_vq_req *vq_req;
+        struct c2wr_cr_reject_rep *reply;
+        int err;
+
+        c2dev = to_c2dev(cm_id->device);
+
+        /*
+         * Allocate verbs request.
+         */
+        vq_req = vq_req_alloc(c2dev);
+        if (!vq_req)
+                return -ENOMEM;
+
+        /*
+         * Build the WR
+         */
+        c2_wr_set_id(&wr, CCWR_CR_REJECT);
+        wr.hdr.context = (unsigned long) vq_req;
+        wr.rnic_handle = c2dev->adapter_handle;
+        wr.ep_handle = (u32) (unsigned long) cm_id->provider_data;
+
+        /*
+         * reference the request struct.  dereferenced in the int handler.
+         */
+        vq_req_get(c2dev, vq_req);
+
+        /*
+         * Send WR to adapter
+         */
+        err = vq_send_wr(c2dev, (union c2wr *) & wr);
+        if (err) {
+                vq_req_put(c2dev, vq_req);
+                goto bail0;
+        }
+
+        /*
+         * Wait for reply from adapter
+         */
+        err = vq_wait_for_reply(c2dev, vq_req);
+        if (err)
+                goto bail0;
+
+        /*
+         * Process reply
+         */
+        reply = (struct c2wr_cr_reject_rep *) (unsigned long)
+                vq_req->reply_msg;
+        if (!reply) {
+                err = -ENOMEM;
+                goto bail0;
+        }
+        err = c2_errno(reply);
+        /*
+         * free vq stuff
+         */
+        vq_repbuf_free(c2dev, reply);
+
+ bail0:
+        vq_req_free(c2dev, vq_req);
+        return err;
+}