RDMA/cxgb4: Add driver for Chelsio T4 RNIC
Add an RDMA/iWARP driver for Chelsio T4 Ethernet adapters.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/cxgb4/ev.c b/drivers/infiniband/hw/cxgb4/ev.c
new file mode 100644
index 0000000..1bd6a3e
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb4/ev.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2009-2010 Chelsio, 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/slab.h>
+#include <linux/mman.h>
+#include <net/sock.h>
+
+#include "iw_cxgb4.h"
+
+static void post_qp_event(struct c4iw_dev *dev, struct c4iw_cq *chp,
+ struct c4iw_qp *qhp,
+ struct t4_cqe *err_cqe,
+ enum ib_event_type ib_event)
+{
+ struct ib_event event;
+ struct c4iw_qp_attributes attrs;
+
+ if ((qhp->attr.state == C4IW_QP_STATE_ERROR) ||
+ (qhp->attr.state == C4IW_QP_STATE_TERMINATE)) {
+ PDBG("%s AE received after RTS - "
+ "qp state %d qpid 0x%x status 0x%x\n", __func__,
+ qhp->attr.state, qhp->wq.sq.qid, CQE_STATUS(err_cqe));
+ return;
+ }
+
+ printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
+ "type %d wrid.hi 0x%x wrid.lo 0x%x\n", __func__,
+ CQE_QPID(err_cqe), CQE_OPCODE(err_cqe),
+ CQE_STATUS(err_cqe), CQE_TYPE(err_cqe),
+ CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe));
+
+ if (qhp->attr.state == C4IW_QP_STATE_RTS) {
+ attrs.next_state = C4IW_QP_STATE_TERMINATE;
+ c4iw_modify_qp(qhp->rhp, qhp, C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 0);
+ }
+
+ event.event = ib_event;
+ event.device = chp->ibcq.device;
+ if (ib_event == IB_EVENT_CQ_ERR)
+ event.element.cq = &chp->ibcq;
+ else
+ event.element.qp = &qhp->ibqp;
+ if (qhp->ibqp.event_handler)
+ (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);
+
+ (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
+}
+
+void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe)
+{
+ struct c4iw_cq *chp;
+ struct c4iw_qp *qhp;
+ u32 cqid;
+
+ spin_lock(&dev->lock);
+ qhp = get_qhp(dev, CQE_QPID(err_cqe));
+ if (!qhp) {
+ printk(KERN_ERR MOD "BAD AE qpid 0x%x opcode %d "
+ "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
+ CQE_QPID(err_cqe),
+ CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
+ CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
+ CQE_WRID_LOW(err_cqe));
+ spin_unlock(&dev->lock);
+ goto out;
+ }
+
+ if (SQ_TYPE(err_cqe))
+ cqid = qhp->attr.scq;
+ else
+ cqid = qhp->attr.rcq;
+ chp = get_chp(dev, cqid);
+ if (!chp) {
+ printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
+ "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n",
+ cqid, CQE_QPID(err_cqe),
+ CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe),
+ CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe),
+ CQE_WRID_LOW(err_cqe));
+ spin_unlock(&dev->lock);
+ goto out;
+ }
+
+ c4iw_qp_add_ref(&qhp->ibqp);
+ atomic_inc(&chp->refcnt);
+ spin_unlock(&dev->lock);
+
+ /* Bad incoming write */
+ if (RQ_TYPE(err_cqe) &&
+ (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE)) {
+ post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_REQ_ERR);
+ goto done;
+ }
+
+ switch (CQE_STATUS(err_cqe)) {
+
+ /* Completion Events */
+ case T4_ERR_SUCCESS:
+ printk(KERN_ERR MOD "AE with status 0!\n");
+ break;
+
+ case T4_ERR_STAG:
+ case T4_ERR_PDID:
+ case T4_ERR_QPID:
+ case T4_ERR_ACCESS:
+ case T4_ERR_WRAP:
+ case T4_ERR_BOUND:
+ case T4_ERR_INVALIDATE_SHARED_MR:
+ case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
+ post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_ACCESS_ERR);
+ break;
+
+ /* Device Fatal Errors */
+ case T4_ERR_ECC:
+ case T4_ERR_ECC_PSTAG:
+ case T4_ERR_INTERNAL_ERR:
+ post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_DEVICE_FATAL);
+ break;
+
+ /* QP Fatal Errors */
+ case T4_ERR_OUT_OF_RQE:
+ case T4_ERR_PBL_ADDR_BOUND:
+ case T4_ERR_CRC:
+ case T4_ERR_MARKER:
+ case T4_ERR_PDU_LEN_ERR:
+ case T4_ERR_DDP_VERSION:
+ case T4_ERR_RDMA_VERSION:
+ case T4_ERR_OPCODE:
+ case T4_ERR_DDP_QUEUE_NUM:
+ case T4_ERR_MSN:
+ case T4_ERR_TBIT:
+ case T4_ERR_MO:
+ case T4_ERR_MSN_GAP:
+ case T4_ERR_MSN_RANGE:
+ case T4_ERR_RQE_ADDR_BOUND:
+ case T4_ERR_IRD_OVERFLOW:
+ post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
+ break;
+
+ default:
+ printk(KERN_ERR MOD "Unknown T4 status 0x%x QPID 0x%x\n",
+ CQE_STATUS(err_cqe), qhp->wq.sq.qid);
+ post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL);
+ break;
+ }
+done:
+ if (atomic_dec_and_test(&chp->refcnt))
+ wake_up(&chp->wait);
+ c4iw_qp_rem_ref(&qhp->ibqp);
+out:
+ return;
+}
+
+int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid)
+{
+ struct c4iw_cq *chp;
+
+ chp = get_chp(dev, qid);
+ if (chp)
+ (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
+ else
+ PDBG("%s unknown cqid 0x%x\n", __func__, qid);
+ return 0;
+}