RDMA/amso1100: Deprecate the amso1100 driver and move to staging

The HW hasn't been sold since 2005, and the SW has definite bit rot.
Its time to remove it.  So move it to staging for a few releases and
then remove it after that.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 327 insertions, 0 deletions

diff --git a/drivers/staging/rdma/amso1100/c2_ae.c b/drivers/staging/rdma/amso1100/c2_ae.c
new file mode 100644
index 000000000000..cedda25232be
--- /dev/null
+++ b/drivers/staging/rdma/amso1100/c2_ae.c
@@ -0,0 +1,327 @@
+/*
+ * 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 <rdma/iw_cm.h>
+#include "c2_status.h"
+#include "c2_ae.h"
+
+static int c2_convert_cm_status(u32 c2_status)
+{
+	switch (c2_status) {
+	case C2_CONN_STATUS_SUCCESS:
+		return 0;
+	case C2_CONN_STATUS_REJECTED:
+		return -ENETRESET;
+	case C2_CONN_STATUS_REFUSED:
+		return -ECONNREFUSED;
+	case C2_CONN_STATUS_TIMEDOUT:
+		return -ETIMEDOUT;
+	case C2_CONN_STATUS_NETUNREACH:
+		return -ENETUNREACH;
+	case C2_CONN_STATUS_HOSTUNREACH:
+		return -EHOSTUNREACH;
+	case C2_CONN_STATUS_INVALID_RNIC:
+		return -EINVAL;
+	case C2_CONN_STATUS_INVALID_QP:
+		return -EINVAL;
+	case C2_CONN_STATUS_INVALID_QP_STATE:
+		return -EINVAL;
+	case C2_CONN_STATUS_ADDR_NOT_AVAIL:
+		return -EADDRNOTAVAIL;
+	default:
+		printk(KERN_ERR PFX
+		       "%s - Unable to convert CM status: %d\n",
+		       __func__, c2_status);
+		return -EIO;
+	}
+}
+
+static const char* to_event_str(int event)
+{
+	static const char* event_str[] = {
+		"CCAE_REMOTE_SHUTDOWN",
+		"CCAE_ACTIVE_CONNECT_RESULTS",
+		"CCAE_CONNECTION_REQUEST",
+		"CCAE_LLP_CLOSE_COMPLETE",
+		"CCAE_TERMINATE_MESSAGE_RECEIVED",
+		"CCAE_LLP_CONNECTION_RESET",
+		"CCAE_LLP_CONNECTION_LOST",
+		"CCAE_LLP_SEGMENT_SIZE_INVALID",
+		"CCAE_LLP_INVALID_CRC",
+		"CCAE_LLP_BAD_FPDU",
+		"CCAE_INVALID_DDP_VERSION",
+		"CCAE_INVALID_RDMA_VERSION",
+		"CCAE_UNEXPECTED_OPCODE",
+		"CCAE_INVALID_DDP_QUEUE_NUMBER",
+		"CCAE_RDMA_READ_NOT_ENABLED",
+		"CCAE_RDMA_WRITE_NOT_ENABLED",
+		"CCAE_RDMA_READ_TOO_SMALL",
+		"CCAE_NO_L_BIT",
+		"CCAE_TAGGED_INVALID_STAG",
+		"CCAE_TAGGED_BASE_BOUNDS_VIOLATION",
+		"CCAE_TAGGED_ACCESS_RIGHTS_VIOLATION",
+		"CCAE_TAGGED_INVALID_PD",
+		"CCAE_WRAP_ERROR",
+		"CCAE_BAD_CLOSE",
+		"CCAE_BAD_LLP_CLOSE",
+		"CCAE_INVALID_MSN_RANGE",
+		"CCAE_INVALID_MSN_GAP",
+		"CCAE_IRRQ_OVERFLOW",
+		"CCAE_IRRQ_MSN_GAP",
+		"CCAE_IRRQ_MSN_RANGE",
+		"CCAE_IRRQ_INVALID_STAG",
+		"CCAE_IRRQ_BASE_BOUNDS_VIOLATION",
+		"CCAE_IRRQ_ACCESS_RIGHTS_VIOLATION",
+		"CCAE_IRRQ_INVALID_PD",
+		"CCAE_IRRQ_WRAP_ERROR",
+		"CCAE_CQ_SQ_COMPLETION_OVERFLOW",
+		"CCAE_CQ_RQ_COMPLETION_ERROR",
+		"CCAE_QP_SRQ_WQE_ERROR",
+		"CCAE_QP_LOCAL_CATASTROPHIC_ERROR",
+		"CCAE_CQ_OVERFLOW",
+		"CCAE_CQ_OPERATION_ERROR",
+		"CCAE_SRQ_LIMIT_REACHED",
+		"CCAE_QP_RQ_LIMIT_REACHED",
+		"CCAE_SRQ_CATASTROPHIC_ERROR",
+		"CCAE_RNIC_CATASTROPHIC_ERROR"
+	};
+
+	if (event < CCAE_REMOTE_SHUTDOWN ||
+	    event > CCAE_RNIC_CATASTROPHIC_ERROR)
+		return "<invalid event>";
+
+	event -= CCAE_REMOTE_SHUTDOWN;
+	return event_str[event];
+}
+
+static const char *to_qp_state_str(int state)
+{
+	switch (state) {
+	case C2_QP_STATE_IDLE:
+		return "C2_QP_STATE_IDLE";
+	case C2_QP_STATE_CONNECTING:
+		return "C2_QP_STATE_CONNECTING";
+	case C2_QP_STATE_RTS:
+		return "C2_QP_STATE_RTS";
+	case C2_QP_STATE_CLOSING:
+		return "C2_QP_STATE_CLOSING";
+	case C2_QP_STATE_TERMINATE:
+		return "C2_QP_STATE_TERMINATE";
+	case C2_QP_STATE_ERROR:
+		return "C2_QP_STATE_ERROR";
+	default:
+		return "<invalid QP state>";
+	}
+}
+
+void c2_ae_event(struct c2_dev *c2dev, u32 mq_index)
+{
+	struct c2_mq *mq = c2dev->qptr_array[mq_index];
+	union c2wr *wr;
+	void *resource_user_context;
+	struct iw_cm_event cm_event;
+	struct ib_event ib_event;
+	enum c2_resource_indicator resource_indicator;
+	enum c2_event_id event_id;
+	unsigned long flags;
+	int status;
+	struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_event.local_addr;
+	struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_event.remote_addr;
+
+	/*
+	 * retrieve the message
+	 */
+	wr = c2_mq_consume(mq);
+	if (!wr)
+		return;
+
+	memset(&ib_event, 0, sizeof(ib_event));
+	memset(&cm_event, 0, sizeof(cm_event));
+
+	event_id = c2_wr_get_id(wr);
+	resource_indicator = be32_to_cpu(wr->ae.ae_generic.resource_type);
+	resource_user_context =
+	    (void *) (unsigned long) wr->ae.ae_generic.user_context;
+
+	status = cm_event.status = c2_convert_cm_status(c2_wr_get_result(wr));
+
+	pr_debug("event received c2_dev=%p, event_id=%d, "
+		"resource_indicator=%d, user_context=%p, status = %d\n",
+		c2dev, event_id, resource_indicator, resource_user_context,
+		status);
+
+	switch (resource_indicator) {
+	case C2_RES_IND_QP:{
+
+		struct c2_qp *qp = (struct c2_qp *)resource_user_context;
+		struct iw_cm_id *cm_id = qp->cm_id;
+		struct c2wr_ae_active_connect_results *res;
+
+		if (!cm_id) {
+			pr_debug("event received, but cm_id is <nul>, qp=%p!\n",
+				qp);
+			goto ignore_it;
+		}
+		pr_debug("%s: event = %s, user_context=%llx, "
+			"resource_type=%x, "
+			"resource=%x, qp_state=%s\n",
+			__func__,
+			to_event_str(event_id),
+			(unsigned long long) wr->ae.ae_generic.user_context,
+			be32_to_cpu(wr->ae.ae_generic.resource_type),
+			be32_to_cpu(wr->ae.ae_generic.resource),
+			to_qp_state_str(be32_to_cpu(wr->ae.ae_generic.qp_state)));
+
+		c2_set_qp_state(qp, be32_to_cpu(wr->ae.ae_generic.qp_state));
+
+		switch (event_id) {
+		case CCAE_ACTIVE_CONNECT_RESULTS:
+			res = &wr->ae.ae_active_connect_results;
+			cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
+			laddr->sin_addr.s_addr = res->laddr;
+			raddr->sin_addr.s_addr = res->raddr;
+			laddr->sin_port = res->lport;
+			raddr->sin_port = res->rport;
+			if (status == 0) {
+				cm_event.private_data_len =
+					be32_to_cpu(res->private_data_length);
+				cm_event.private_data = res->private_data;
+			} else {
+				spin_lock_irqsave(&qp->lock, flags);
+				if (qp->cm_id) {
+					qp->cm_id->rem_ref(qp->cm_id);
+					qp->cm_id = NULL;
+				}
+				spin_unlock_irqrestore(&qp->lock, flags);
+				cm_event.private_data_len = 0;
+				cm_event.private_data = NULL;
+			}
+			if (cm_id->event_handler)
+				cm_id->event_handler(cm_id, &cm_event);
+			break;
+		case CCAE_TERMINATE_MESSAGE_RECEIVED:
+		case CCAE_CQ_SQ_COMPLETION_OVERFLOW:
+			ib_event.device = &c2dev->ibdev;
+			ib_event.element.qp = &qp->ibqp;
+			ib_event.event = IB_EVENT_QP_REQ_ERR;
+
+			if (qp->ibqp.event_handler)
+				qp->ibqp.event_handler(&ib_event,
+						       qp->ibqp.
+						       qp_context);
+			break;
+		case CCAE_BAD_CLOSE:
+		case CCAE_LLP_CLOSE_COMPLETE:
+		case CCAE_LLP_CONNECTION_RESET:
+		case CCAE_LLP_CONNECTION_LOST:
+			BUG_ON(cm_id->event_handler==(void*)0x6b6b6b6b);
+
+			spin_lock_irqsave(&qp->lock, flags);
+			if (qp->cm_id) {
+				qp->cm_id->rem_ref(qp->cm_id);
+				qp->cm_id = NULL;
+			}
+			spin_unlock_irqrestore(&qp->lock, flags);
+			cm_event.event = IW_CM_EVENT_CLOSE;
+			cm_event.status = 0;
+			if (cm_id->event_handler)
+				cm_id->event_handler(cm_id, &cm_event);
+			break;
+		default:
+			BUG_ON(1);
+			pr_debug("%s:%d Unexpected event_id=%d on QP=%p, "
+				"CM_ID=%p\n",
+				__func__, __LINE__,
+				event_id, qp, cm_id);
+			break;
+		}
+		break;
+	}
+
+	case C2_RES_IND_EP:{
+
+		struct c2wr_ae_connection_request *req =
+			&wr->ae.ae_connection_request;
+		struct iw_cm_id *cm_id =
+			(struct iw_cm_id *)resource_user_context;
+
+		pr_debug("C2_RES_IND_EP event_id=%d\n", event_id);
+		if (event_id != CCAE_CONNECTION_REQUEST) {
+			pr_debug("%s: Invalid event_id: %d\n",
+				__func__, event_id);
+			break;
+		}
+		cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
+		cm_event.provider_data = (void*)(unsigned long)req->cr_handle;
+		laddr->sin_addr.s_addr = req->laddr;
+		raddr->sin_addr.s_addr = req->raddr;
+		laddr->sin_port = req->lport;
+		raddr->sin_port = req->rport;
+		cm_event.private_data_len =
+			be32_to_cpu(req->private_data_length);
+		cm_event.private_data = req->private_data;
+		/*
+		 * Until ird/ord negotiation via MPAv2 support is added, send
+		 * max supported values
+		 */
+		cm_event.ird = cm_event.ord = 128;
+
+		if (cm_id->event_handler)
+			cm_id->event_handler(cm_id, &cm_event);
+		break;
+	}
+
+	case C2_RES_IND_CQ:{
+		struct c2_cq *cq =
+		    (struct c2_cq *) resource_user_context;
+
+		pr_debug("IB_EVENT_CQ_ERR\n");
+		ib_event.device = &c2dev->ibdev;
+		ib_event.element.cq = &cq->ibcq;
+		ib_event.event = IB_EVENT_CQ_ERR;
+
+		if (cq->ibcq.event_handler)
+			cq->ibcq.event_handler(&ib_event,
+					       cq->ibcq.cq_context);
+		break;
+	}
+
+	default:
+		printk("Bad resource indicator = %d\n",
+		       resource_indicator);
+		break;
+	}
+
+ ignore_it:
+	c2_mq_free(mq);
+}