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Message-Id: <1286261647-5139-1-git-send-email-bmt@zurich.ibm.com>
Date: Tue, 5 Oct 2010 08:54:07 +0200
From: Bernard Metzler <bmt@...ich.ibm.com>
To: netdev@...r.kernel.org
Cc: linux-rdma@...r.kernel.org, Bernard Metzler <bmt@...ich.ibm.com>
Subject: [PATCH] SIW: User interface
---
drivers/infiniband/hw/siw/siw_ae.c | 96 ++
drivers/infiniband/hw/siw/siw_user.h | 66 ++
drivers/infiniband/hw/siw/siw_verbs.c | 1564 +++++++++++++++++++++++++++++++++
drivers/infiniband/hw/siw/siw_verbs.h | 96 ++
4 files changed, 1822 insertions(+), 0 deletions(-)
create mode 100644 drivers/infiniband/hw/siw/siw_ae.c
create mode 100644 drivers/infiniband/hw/siw/siw_user.h
create mode 100644 drivers/infiniband/hw/siw/siw_verbs.c
create mode 100644 drivers/infiniband/hw/siw/siw_verbs.h
diff --git a/drivers/infiniband/hw/siw/siw_ae.c b/drivers/infiniband/hw/siw/siw_ae.c
new file mode 100644
index 0000000..7e9ab3f
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_ae.c
@@ -0,0 +1,96 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@...ich.ibm.com>
+ *
+ * Copyright (c) 2008-2010, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ * - Neither the name of IBM nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * 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/errno.h>
+#include <linux/types.h>
+#include <linux/net.h>
+#include <linux/scatterlist.h>
+#include <linux/highmem.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <net/tcp.h>
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_umem.h>
+
+#include "siw.h"
+#include "siw_obj.h"
+#include "siw_cm.h"
+
+/*
+ * siw_async_ev()
+ *
+ * Report Asynchonous event to user.
+ */
+void siw_async_ev(struct siw_qp *qp, struct siw_cq *cq,
+ enum ib_event_type etype)
+{
+ static struct ib_event event;
+
+ dprint(DBG_EH, "(QP%d): AE type %d\n", QP_ID(qp), etype);
+
+ event.event = etype;
+ event.device = qp->ofa_qp.device;
+ if (cq)
+ event.element.cq = &cq->ofa_cq;
+ else
+ event.element.qp = &qp->ofa_qp;
+
+ if (!(qp->attrs.flags & SIW_QP_IN_DESTROY) &&
+ qp->ofa_qp.event_handler) {
+ dprint(DBG_EH, "(QP%d): Call AEH\n", QP_ID(qp));
+ (*qp->ofa_qp.event_handler)(&event, qp->ofa_qp.qp_context);
+ }
+}
+
+void siw_async_srq_ev(struct siw_srq *srq, enum ib_event_type etype)
+{
+ static struct ib_event event;
+
+ dprint(DBG_EH, "(SRQ%p): AE type %d\n", srq, etype);
+
+ event.event = etype;
+ event.device = srq->ofa_srq.device;
+ event.element.srq = &srq->ofa_srq;
+
+ if (srq->ofa_srq.event_handler)
+ (*srq->ofa_srq.event_handler)(&event, srq->ofa_srq.srq_context);
+}
diff --git a/drivers/infiniband/hw/siw/siw_user.h b/drivers/infiniband/hw/siw/siw_user.h
new file mode 100644
index 0000000..ce7857d
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_user.h
@@ -0,0 +1,66 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@...ich.ibm.com>
+ *
+ * Copyright (c) 2008-2010, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ * - Neither the name of IBM nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * 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.
+ */
+
+#ifndef _SIW_USER_H
+#define _SIW_USER_H
+
+/*
+ * user commands/command responses must correlate with the siw_abi
+ * in user land.
+ */
+
+struct siw_uresp_create_cq {
+ __u32 cq_id;
+};
+
+struct siw_uresp_create_qp {
+ __u32 qp_id;
+ __u32 sq_size;
+ __u32 rq_size;
+};
+
+struct siw_uresp_reg_mr {
+ __u32 stag;
+};
+
+struct siw_ureq_reg_mr {
+ __u8 stag_key;
+ __u8 reserved[3];
+};
+
+#endif
diff --git a/drivers/infiniband/hw/siw/siw_verbs.c b/drivers/infiniband/hw/siw/siw_verbs.c
new file mode 100644
index 0000000..8633b0f
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_verbs.c
@@ -0,0 +1,1564 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@...ich.ibm.com>
+ *
+ * Copyright (c) 2008-2010, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ * - Neither the name of IBM nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * 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/errno.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_umem.h>
+
+#include "siw.h"
+#include "siw_obj.h"
+#include "siw_cm.h"
+
+static int ib_qp_state_to_siw_qp_state[IB_QPS_ERR+1] = {
+ [IB_QPS_RESET] = SIW_QP_STATE_IDLE,
+ [IB_QPS_INIT] = SIW_QP_STATE_IDLE,
+ [IB_QPS_RTR] = SIW_QP_STATE_RTR,
+ [IB_QPS_RTS] = SIW_QP_STATE_RTS,
+ [IB_QPS_SQD] = SIW_QP_STATE_CLOSING,
+ [IB_QPS_SQE] = SIW_QP_STATE_TERMINATE,
+ [IB_QPS_ERR] = SIW_QP_STATE_ERROR
+};
+
+static inline struct siw_mr *siw_mr_ofa2siw(struct ib_mr *ofa_mr)
+{
+ return container_of(ofa_mr, struct siw_mr, ofa_mr);
+}
+
+static inline struct siw_pd *siw_pd_ofa2siw(struct ib_pd *ofa_pd)
+{
+ return container_of(ofa_pd, struct siw_pd, ofa_pd);
+}
+
+static inline struct siw_ucontext *siw_ctx_ofa2siw(
+ struct ib_ucontext *ofa_ctx)
+{
+ return container_of(ofa_ctx, struct siw_ucontext, ib_ucontext);
+}
+
+static inline struct siw_qp *siw_qp_ofa2siw(struct ib_qp *ofa_qp)
+{
+ return container_of(ofa_qp, struct siw_qp, ofa_qp);
+}
+
+static inline struct siw_cq *siw_cq_ofa2siw(struct ib_cq *ofa_cq)
+{
+ return container_of(ofa_cq, struct siw_cq, ofa_cq);
+}
+
+static inline struct siw_srq *siw_srq_ofa2siw(struct ib_srq *ofa_srq)
+{
+ return container_of(ofa_srq, struct siw_srq, ofa_srq);
+}
+
+struct ib_ucontext *siw_alloc_ucontext(struct ib_device *ofa_dev,
+ struct ib_udata *udata)
+{
+ struct siw_ucontext *ctx;
+
+ dprint(DBG_CM, "(device=%s)\n", ofa_dev->name);
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ dprint(DBG_ON, " kzalloc\n");
+ return ERR_PTR(-ENOMEM);
+ }
+ return &ctx->ib_ucontext;
+}
+
+int siw_dealloc_ucontext(struct ib_ucontext *ctx)
+{
+ struct siw_ucontext *ucontext;
+
+ ucontext = siw_ctx_ofa2siw(ctx);
+
+ kfree(ucontext);
+
+ return 0;
+}
+
+int siw_query_device(struct ib_device *ofa_dev, struct ib_device_attr *attr)
+{
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+
+ memset(attr, 0, sizeof *attr);
+
+ attr->max_mr_size = dev->attrs.max_mr_size;
+ attr->vendor_id = dev->attrs.vendor_id;
+ attr->vendor_part_id = dev->attrs.vendor_part_id;
+ attr->max_qp = dev->attrs.max_qp;
+ attr->max_qp_wr = dev->attrs.max_qp_wr;
+
+ /*
+ * RDMA Read parameters:
+ * Max. ORD (Outbound Read queue Depth), a.k.a. max_initiator_depth
+ * Max. IRD (Inbound Read queue Depth), a.k.a. max_responder_resources
+ */
+ attr->max_qp_rd_atom = dev->attrs.max_ord;
+ attr->max_qp_init_rd_atom = dev->attrs.max_ird;
+ attr->max_res_rd_atom = dev->attrs.max_qp * dev->attrs.max_ird;
+ attr->device_cap_flags = dev->attrs.cap_flags;
+ attr->max_sge = dev->attrs.max_sge;
+ attr->max_sge_rd = dev->attrs.max_sge_rd;
+ attr->max_cq = dev->attrs.max_cq;
+ attr->max_cqe = dev->attrs.max_cqe;
+ attr->max_mr = dev->attrs.max_mr;
+ attr->max_pd = dev->attrs.max_pd;
+ attr->max_mw = dev->attrs.max_mw;
+ attr->max_fmr = dev->attrs.max_fmr;
+ attr->max_srq = dev->attrs.max_srq;
+ attr->max_srq_wr = dev->attrs.max_srq_wr;
+ attr->max_srq_sge = dev->attrs.max_srq_sge;
+
+ memcpy(&attr->sys_image_guid, dev->l2dev->dev_addr, 6);
+
+ /*
+ * TODO: understand what of the following should
+ * get useful information
+ *
+ * attr->fw_ver;
+ * attr->max_ah
+ * attr->max_map_per_fmr
+ * attr->max_ee
+ * attr->max_rdd
+ * attr->max_ee_rd_atom;
+ * attr->max_ee_init_rd_atom;
+ * attr->max_raw_ipv6_qp
+ * attr->max_raw_ethy_qp
+ * attr->max_mcast_grp
+ * attr->max_mcast_qp_attach
+ * attr->max_total_mcast_qp_attach
+ * attr->max_pkeys
+ * attr->atomic_cap;
+ * attr->page_size_cap;
+ * attr->hw_ver;
+ * attr->local_ca_ack_delay;
+ */
+ return 0;
+}
+
+/*
+ * Approximate translation of real MTU for IB.
+ *
+ * TODO: is that needed for RNIC's? We may have a medium
+ * which reports MTU of 64kb and have to degrade to 4k??
+ */
+static inline enum ib_mtu siw_mtu_net2ofa(unsigned short mtu)
+{
+ if (mtu >= 4096)
+ return IB_MTU_4096;
+ if (mtu >= 2048)
+ return IB_MTU_2048;
+ if (mtu >= 1024)
+ return IB_MTU_1024;
+ if (mtu >= 512)
+ return IB_MTU_512;
+ if (mtu >= 256)
+ return IB_MTU_256;
+ return -1;
+}
+
+int siw_query_port(struct ib_device *ofa_dev, u8 port,
+ struct ib_port_attr *attr)
+{
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+
+ memset(attr, 0, sizeof *attr);
+ /*
+ * TODO: fully understand what to do here
+ */
+ attr->state = IB_PORT_ACTIVE; /* ?? */
+ attr->max_mtu = siw_mtu_net2ofa(dev->l2dev->mtu);
+ attr->active_mtu = attr->max_mtu;
+ attr->gid_tbl_len = 1;
+ attr->port_cap_flags = IB_PORT_CM_SUP; /* ?? */
+ attr->port_cap_flags |= IB_PORT_DEVICE_MGMT_SUP;
+ attr->max_msg_sz = -1;
+ attr->pkey_tbl_len = 1;
+ attr->active_width = 2;
+ attr->active_speed = 2;
+ /*
+ * All zero
+ *
+ * attr->lid = 0;
+ * attr->bad_pkey_cntr = 0;
+ * attr->qkey_viol_cntr = 0;
+ * attr->sm_lid = 0;
+ * attr->lmc = 0;
+ * attr->max_vl_num = 0;
+ * attr->sm_sl = 0;
+ * attr->subnet_timeout = 0;
+ * attr->init_type_repy = 0;
+ * attr->phys_state = 0;
+ */
+ return 0;
+}
+
+int siw_query_pkey(struct ib_device *ofa_dev, u8 port, u16 idx, u16 *pkey)
+{
+ *pkey = 0;
+ return 0;
+}
+
+int siw_query_gid(struct ib_device *ofa_dev, u8 port, int idx,
+ union ib_gid *gid)
+{
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+
+ /* subnet_prefix == interface_id == 0; */
+ memset(gid, 0, sizeof *gid);
+ memcpy(&gid->raw[0], dev->l2dev->dev_addr, 6);
+
+ return 0;
+}
+
+struct ib_pd *siw_alloc_pd(struct ib_device *ofa_dev,
+ struct ib_ucontext *context, struct ib_udata *udata)
+{
+ struct siw_pd *pd = NULL;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+ int rv;
+
+ if (atomic_inc_return(&dev->num_pd) > SIW_MAX_PD) {
+ dprint(DBG_ON, ": Out of PD's\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ pd = kmalloc(sizeof *pd, GFP_KERNEL);
+ if (!pd) {
+ dprint(DBG_ON, ": malloc\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ rv = siw_pd_add(dev, pd);
+ if (rv) {
+ dprint(DBG_ON, ": siw_pd_add\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ if (context) {
+ if (ib_copy_to_udata(udata, &pd->hdr.id, sizeof pd->hdr.id)) {
+ rv = -EFAULT;
+ goto err_out_idr;
+ }
+ }
+ return &pd->ofa_pd;
+
+err_out_idr:
+ siw_remove_obj(&dev->idr_lock, &dev->pd_idr, &pd->hdr);
+err_out:
+ kfree(pd);
+ atomic_dec(&dev->num_pd);
+
+ return ERR_PTR(rv);
+}
+
+int siw_dealloc_pd(struct ib_pd *ofa_pd)
+{
+ struct siw_pd *pd = siw_pd_ofa2siw(ofa_pd);
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_pd->device);
+
+ siw_remove_obj(&dev->idr_lock, &dev->pd_idr, &pd->hdr);
+ siw_pd_put(pd);
+
+ atomic_dec(&dev->num_pd);
+ return 0;
+}
+
+struct ib_ah *siw_create_ah(struct ib_pd *pd, struct ib_ah_attr *attr)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+int siw_destroy_ah(struct ib_ah *ah)
+{
+ return -ENOSYS;
+}
+
+
+void siw_qp_get_ref(struct ib_qp *ofa_qp)
+{
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+
+ dprint(DBG_OBJ|DBG_CM, "(QP%d): Get Reference\n", QP_ID(qp));
+ siw_qp_get(qp);
+}
+
+
+void siw_qp_put_ref(struct ib_qp *ofa_qp)
+{
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+
+ dprint(DBG_OBJ|DBG_CM, "(QP%d): Put Reference\n", QP_ID(qp));
+ siw_qp_put(qp);
+}
+
+int siw_no_mad(struct ib_device *ofa_dev, int flags, u8 port,
+ struct ib_wc *wc, struct ib_grh *grh,
+ struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+ return -ENOSYS;
+}
+
+
+/*
+ * siw_create_qp()
+ *
+ * Create QP of requested size on given device.
+ *
+ * @ofa_pd: OFA PD contained in siw PD
+ * @attrs: Initial QP attributes.
+ * @udata: used to provide QP ID, SQ and RQ size back to user.
+ */
+
+struct ib_qp *siw_create_qp(struct ib_pd *ofa_pd, struct ib_qp_init_attr *attrs,
+ struct ib_udata *udata)
+{
+ struct siw_qp *qp = NULL;
+ struct siw_pd *pd = siw_pd_ofa2siw(ofa_pd);
+ struct ib_device *ofa_dev = ofa_pd->device;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+ struct siw_cq *scq = NULL, *rcq = NULL;
+ struct siw_iwarp_tx *c_tx;
+ struct siw_iwarp_rx *c_rx;
+ struct siw_uresp_create_qp uresp;
+
+ int rv = 0;
+
+ dprint(DBG_OBJ|DBG_CM, ": new QP on device %s\n",
+ ofa_dev->name);
+
+ if (atomic_inc_return(&dev->num_qp) > SIW_MAX_QP) {
+ dprint(DBG_ON, ": Out of QP's\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ if (attrs->qp_type != IB_QPT_RC) {
+ dprint(DBG_ON, ": Only RC QP's supported\n");
+ rv = -EINVAL;
+ goto err_out;
+ }
+ if ((attrs->cap.max_send_wr > SIW_MAX_QP_WR) ||
+ (attrs->cap.max_recv_wr > SIW_MAX_QP_WR) ||
+ (attrs->cap.max_send_sge > SIW_MAX_SGE) ||
+ (attrs->cap.max_recv_sge > SIW_MAX_SGE)) {
+ dprint(DBG_ON, ": QP Size!\n");
+ rv = -EINVAL;
+ goto err_out;
+ }
+ /*
+ * NOTE: we allow for zero element SQ and RQ WQE's SGL's
+ * but not for a QP unable to hold any WQE (SQ + RQ)
+ */
+ if (attrs->cap.max_send_wr + attrs->cap.max_recv_wr == 0) {
+ rv = -EINVAL;
+ goto err_out;
+ }
+
+ scq = siw_cq_id2obj(dev, ((struct siw_cq *)attrs->send_cq)->hdr.id);
+ rcq = siw_cq_id2obj(dev, ((struct siw_cq *)attrs->recv_cq)->hdr.id);
+
+ if (!scq || !rcq) {
+ dprint(DBG_OBJ, ": Fail: SCQ: 0x%p, RCQ: 0x%p\n",
+ scq, rcq);
+ rv = -EINVAL;
+ goto err_out;
+ }
+ qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp) {
+ dprint(DBG_ON, ": kzalloc\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+
+ rv = siw_qp_add(dev, qp);
+ if (rv)
+ goto err_out;
+
+ INIT_LIST_HEAD(&qp->wqe_freelist);
+ INIT_LIST_HEAD(&qp->sq);
+ INIT_LIST_HEAD(&qp->rq);
+ INIT_LIST_HEAD(&qp->orq);
+ INIT_LIST_HEAD(&qp->irq);
+
+ init_rwsem(&qp->state_lock);
+ spin_lock_init(&qp->freelist_lock);
+ spin_lock_init(&qp->sq_lock);
+ spin_lock_init(&qp->rq_lock);
+ spin_lock_init(&qp->orq_lock);
+
+ init_waitqueue_head(&qp->tx_ctx.waitq);
+
+ qp->pd = pd;
+ qp->scq = scq;
+ qp->rcq = rcq;
+
+ if (attrs->srq) {
+ /*
+ * SRQ support.
+ * Verbs 6.3.7: ignore RQ size, if SRQ present
+ * Verbs 6.3.5: do not check PD of SRQ against PD of QP
+ */
+ qp->srq = siw_srq_ofa2siw(attrs->srq);
+ qp->attrs.rq_size = 0;
+ atomic_set(&qp->rq_space, 0);
+ dprint(DBG_OBJ, " QP(%d): SRQ(%p) attached\n",
+ QP_ID(qp), qp->srq);
+ } else {
+ qp->srq = NULL;
+ qp->attrs.rq_size = attrs->cap.max_recv_wr;
+ atomic_set(&qp->rq_space, qp->attrs.rq_size);
+ }
+ qp->attrs.sq_size = attrs->cap.max_send_wr;
+ atomic_set(&qp->sq_space, qp->attrs.sq_size);
+ qp->attrs.sq_max_sges = attrs->cap.max_send_sge;
+ /*
+ * ofed has no max_send_sge_rdmawrite
+ */
+ qp->attrs.sq_max_sges_rdmaw = attrs->cap.max_send_sge;
+ qp->attrs.rq_max_sges = attrs->cap.max_recv_sge;
+ /*
+ * while not part of attrs we init ord/ird here
+ */
+ qp->attrs.ord = dev->attrs.max_ord;
+ qp->attrs.ird = dev->attrs.max_ird;
+
+ qp->attrs.state = SIW_QP_STATE_IDLE;
+
+ if (udata) {
+ uresp.sq_size = qp->attrs.sq_size;
+ uresp.rq_size = qp->attrs.rq_size;
+ uresp.qp_id = QP_ID(qp);
+
+ rv = ib_copy_to_udata(udata, &uresp, sizeof uresp);
+ if (rv)
+ goto err_out_idr;
+ }
+ c_tx = &qp->tx_ctx;
+ c_rx = &qp->rx_ctx;
+
+ c_tx->crc_enabled = c_rx->crc_enabled = CONFIG_RDMA_SIW_CRC_ENFORCED;
+
+ if (c_tx->crc_enabled) {
+ c_tx->mpa_crc_hd.tfm =
+ crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(c_tx->mpa_crc_hd.tfm)) {
+ rv = -PTR_ERR(c_tx->mpa_crc_hd.tfm);
+ dprint(DBG_ON, "(QP%d): Failed loading crc32c"
+ " with error %d. ", QP_ID(qp), rv);
+ goto err_out_idr;
+ }
+ }
+ if (c_rx->crc_enabled) {
+ c_rx->mpa_crc_hd.tfm =
+ crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(c_rx->mpa_crc_hd.tfm)) {
+ rv = -PTR_ERR(c_rx->mpa_crc_hd.tfm);
+ crypto_free_hash(c_tx->mpa_crc_hd.tfm);
+ goto err_out_idr;
+ }
+ }
+ atomic_set(&qp->tx_ctx.in_use, 0);
+
+ qp->ofa_qp.qp_num = QP_ID(qp);
+
+ siw_pd_get(pd);
+
+ return &qp->ofa_qp;
+
+err_out_idr:
+ siw_remove_obj(&dev->idr_lock, &dev->qp_idr, &qp->hdr);
+err_out:
+ if (scq)
+ siw_cq_put(scq);
+ if (rcq)
+ siw_cq_put(rcq);
+
+ kfree(qp);
+ atomic_dec(&dev->num_qp);
+
+ return ERR_PTR(rv);
+}
+
+/*
+ * Minimum siw_query_qp() verb interface to allow for qperf application
+ * to run on siw.
+ *
+ * TODO: all.
+ */
+int siw_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
+ int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
+{
+ qp_attr->cap.max_inline_data = SIW_MAX_INLINE;
+ qp_init_attr->cap.max_inline_data = 0;
+
+ return 0;
+}
+
+int siw_ofed_modify_qp(struct ib_qp *ofa_qp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ struct siw_qp_attrs new_attrs;
+ enum siw_qp_attr_mask siw_attr_mask = 0;
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+ int rv;
+
+ if (!attr_mask) {
+ dprint(DBG_CM, "(QP%d): attr_mask==0 ignored\n", QP_ID(qp));
+ return 0;
+ }
+ siw_dprint_qp_attr_mask(attr_mask);
+
+ memset(&new_attrs, 0, sizeof new_attrs);
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS) {
+
+ siw_attr_mask |= SIW_QP_ATTR_ACCESS_FLAGS;
+
+ if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ)
+ new_attrs.flags |= SIW_RDMA_READ_ENABLED;
+ if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE)
+ new_attrs.flags |= SIW_RDMA_WRITE_ENABLED;
+ if (attr->qp_access_flags & IB_ACCESS_MW_BIND)
+ new_attrs.flags |= SIW_RDMA_BIND_ENABLED;
+ }
+ if (attr_mask & IB_QP_STATE) {
+ dprint(DBG_CM, "(QP%d): Desired IB QP state: %s\n",
+ QP_ID(qp), ib_qp_state_to_string[attr->qp_state]);
+
+ new_attrs.state = ib_qp_state_to_siw_qp_state[attr->qp_state];
+
+ if (new_attrs.state > SIW_QP_STATE_RTS)
+ qp->tx_ctx.tx_suspend = 1;
+
+ /* TODO: SIW_QP_STATE_UNDEF is currently not possible ... */
+ if (new_attrs.state == SIW_QP_STATE_UNDEF)
+ return -EINVAL;
+
+ siw_attr_mask |= SIW_QP_ATTR_STATE;
+ }
+ if (!attr_mask)
+ return 0;
+
+ down_write(&qp->state_lock);
+
+ rv = siw_qp_modify(qp, &new_attrs, siw_attr_mask);
+
+ up_write(&qp->state_lock);
+ return rv;
+}
+
+int siw_destroy_qp(struct ib_qp *ofa_qp)
+{
+ struct ib_device *ofa_dev = ofa_qp->device;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+ struct siw_cep *cep;
+ struct siw_qp_attrs qp_attrs;
+
+ dprint(DBG_CM, "(QP%d): SIW QP state=%d, cep=0x%p\n",
+ QP_ID(qp), qp->attrs.state, qp->cep);
+
+ /*
+ * Mark QP as in process of destruction to prevent from eventual async
+ * callbacks to OFA core
+ */
+ qp->attrs.flags |= SIW_QP_IN_DESTROY;
+ qp->rx_ctx.rx_suspend = 1;
+
+ down_write(&qp->state_lock);
+
+ qp_attrs.state = SIW_QP_STATE_ERROR;
+ (void)siw_qp_modify(qp, &qp_attrs, SIW_QP_ATTR_STATE);
+
+ up_write(&qp->state_lock);
+
+ cep = qp->cep;
+ if (cep) {
+ /*
+ * Wait if CM work is scheduled. calling siw_qp_modify()
+ * already dropped the network connection.
+ */
+ dprint(DBG_CM, " (QP%d) (CEP 0x%p): %s (%d)\n",
+ QP_ID(qp), cep, atomic_read(&cep->ref.refcount) > 1 ?
+ "Wait for CM" : "CM done",
+ atomic_read(&cep->ref.refcount));
+
+ wait_event(cep->waitq, atomic_read(&cep->ref.refcount) == 1);
+ dprint(DBG_CM, "(QP%d): CM done 2\n", QP_ID(qp));
+ qp->cep = 0;
+ siw_cep_put(cep);
+ }
+
+ if (qp->rx_ctx.crc_enabled)
+ crypto_free_hash(qp->rx_ctx.mpa_crc_hd.tfm);
+ if (qp->tx_ctx.crc_enabled)
+ crypto_free_hash(qp->tx_ctx.mpa_crc_hd.tfm);
+
+ siw_remove_obj(&dev->idr_lock, &dev->qp_idr, &qp->hdr);
+
+ /* Drop references */
+ siw_cq_put(qp->scq);
+ siw_cq_put(qp->rcq);
+ siw_pd_put(qp->pd);
+ qp->scq = qp->rcq = NULL;
+
+ siw_qp_freeq_flush(qp);
+
+ siw_qp_put(qp);
+
+ atomic_dec(&dev->num_qp);
+ return 0;
+}
+
+/*
+ * siw_copy_sgl()
+ *
+ * Copy SGL from user (OFA) representation to local
+ * representation.
+ * Memory lookup and base+bounds checks must
+ * be deferred until wqe gets executed
+ */
+static int siw_copy_sgl(struct ib_sge *ofa_sge, struct siw_sge *si_sge,
+ int num_sge)
+{
+ int bytes = 0;
+
+ while (num_sge--) {
+ si_sge->addr = ofa_sge->addr;
+ si_sge->len = ofa_sge->length;
+ si_sge->lkey = ofa_sge->lkey;
+ /*
+ * defer memory lookup to WQE processing
+ */
+ si_sge->mem.obj = NULL;
+
+ bytes += si_sge->len;
+ si_sge++; ofa_sge++;
+ }
+ return bytes;
+}
+
+/*
+ * siw_copy_inline_sgl()
+ *
+ * Prepare sgl of inlined data for sending.
+ * User provided sgl with unregistered user buffers. The function checks
+ * if the given buffer addresses and len's are within process context
+ * bounds and copies data into one kernel buffer. This implies dual copy
+ * operation in the tx path since TCP will make another copy for
+ * retransmission. There is room for efficiency improvement.
+ */
+static int siw_copy_inline_sgl(struct ib_sge *ofa_sge, struct siw_sge *si_sge,
+ int num_sge)
+{
+ char *kbuf;
+ int i, bytes = 0;
+
+ if (unlikely(num_sge == 0))
+ return 0;
+
+ for (i = 0; i < num_sge; i++) {
+ struct ib_sge *sge = &ofa_sge[i];
+
+ if (unlikely(!access_ok(VERIFY_READ, sge->addr, sge->length)))
+ return -EFAULT;
+
+ bytes += sge->length;
+
+ if (bytes > SIW_MAX_INLINE)
+ return -EINVAL;
+ }
+ if (unlikely(!bytes))
+ return 0;
+
+ kbuf = kmalloc(bytes, GFP_KERNEL);
+ if (unlikely(!kbuf)) {
+ dprint(DBG_ON, " kmalloc\n");
+ return -ENOMEM;
+ }
+ si_sge->mem.buf = kbuf;
+
+ while (num_sge--) {
+ if (__copy_from_user(kbuf,
+ (void *)(unsigned long)ofa_sge->addr,
+ ofa_sge->length)) {
+ kfree(si_sge->mem.buf);
+ return -EFAULT;
+ }
+ kbuf += ofa_sge->length;
+ ofa_sge++;
+ }
+ si_sge->len = bytes;
+ si_sge->lkey = 0;
+ si_sge->addr = 0; /* don't need the user addr */
+ return bytes;
+}
+
+
+/*
+ * siw_post_send()
+ *
+ * Post a list of S-WR's to a SQ.
+ *
+ * @ofa_qp: OFA QP contained in siw QP
+ * @wr: Null terminated list of user WR's
+ * @bad_wr: Points to failing WR in case of synchronous failure.
+ */
+int siw_post_send(struct ib_qp *ofa_qp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct siw_wqe *wqe = NULL;
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+
+ unsigned long flags;
+ int rv = 0;
+
+ dprint(DBG_WR|DBG_TX, "(QP%d): state=%d\n",
+ QP_ID(qp), qp->attrs.state);
+
+ /*
+ * Acquire QP state lock for reading. The idea is that a
+ * user cannot move the QP out of RTS during TX/RX processing.
+ */
+ down_read(&qp->state_lock);
+
+ if (qp->attrs.state != SIW_QP_STATE_RTS) {
+ dprint(DBG_WR|DBG_ON, "(QP%d): state=%d\n",
+ QP_ID(qp), qp->attrs.state);
+ up_read(&qp->state_lock);
+ *bad_wr = wr;
+ return -ENOTCONN;
+ }
+ dprint(DBG_WR|DBG_TX, "(QP%d): sq_space(#1)=%d\n",
+ QP_ID(qp), atomic_read(&qp->sq_space));
+
+ while (wr) {
+ if (!atomic_read(&qp->sq_space)) {
+ dprint(DBG_ON, " sq_space\n");
+ wqe = NULL;
+ rv = -ENOMEM;
+ break;
+ }
+ wqe = siw_wqe_get(qp, wr->opcode);
+ if (!wqe) {
+ dprint(DBG_ON, " siw_wqe_get\n");
+ rv = -ENOMEM;
+ break;
+ }
+ if (wr->num_sge > qp->attrs.sq_max_sges) {
+ /*
+ * NOTE: we allow for zero length wr's here.
+ */
+ dprint(DBG_WR, "(QP%d): Num SGE: %d\n",
+ QP_ID(qp), wr->num_sge);
+ rv = -EINVAL;
+ break;
+ }
+ wr_type(wqe) = wr->opcode;
+ wr_flags(wqe) = wr->send_flags;
+ wr_id(wqe) = wr->wr_id;
+
+ if (SIW_INLINED_DATA(wqe))
+ dprint(DBG_WR, "(QP%d): INLINE DATA\n", QP_ID(qp));
+
+ switch (wr->opcode) {
+
+ case IB_WR_SEND:
+ if (!SIW_INLINED_DATA(wqe)) {
+ rv = siw_copy_sgl(wr->sg_list, wqe->wr.send.sge,
+ wr->num_sge);
+ wqe->wr.send.num_sge = wr->num_sge;
+ } else {
+ rv = siw_copy_inline_sgl(wr->sg_list,
+ wqe->wr.send.sge,
+ wr->num_sge);
+ wqe->wr.send.num_sge = 1;
+ }
+ if (rv <= 0) {
+ rv = -EINVAL;
+ break;
+ }
+ wqe->bytes = rv;
+ break;
+
+ case IB_WR_RDMA_READ:
+ /*
+ * OFED WR restricts RREAD sink to SGL containing
+ * 1 SGE only. we could relax to SGL with multiple
+ * elements referring the SAME ltag or even sending
+ * a private per-rreq tag referring to a checked
+ * local sgl with MULTIPLE ltag's. would be easy
+ * to do...
+ */
+ if (wr->num_sge != 1) {
+ rv = -EINVAL;
+ break;
+ }
+ rv = siw_copy_sgl(wr->sg_list, wqe->wr.rread.sge, 1);
+ /*
+ * NOTE: zero length RREAD is allowed!
+ */
+ wqe->wr.rread.raddr = wr->wr.rdma.remote_addr;
+ wqe->wr.rread.rtag = wr->wr.rdma.rkey;
+ wqe->wr.rread.num_sge = 1;
+ wqe->bytes = rv;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ if (!SIW_INLINED_DATA(wqe)) {
+ rv = siw_copy_sgl(wr->sg_list, wqe->wr.send.sge,
+ wr->num_sge);
+ wqe->wr.write.num_sge = wr->num_sge;
+ } else {
+ rv = siw_copy_inline_sgl(wr->sg_list,
+ wqe->wr.send.sge,
+ wr->num_sge);
+ wqe->wr.write.num_sge = min(1, wr->num_sge);
+ }
+ /*
+ * NOTE: zero length WRITE is allowed!
+ */
+ if (rv < 0) {
+ rv = -EINVAL;
+ break;
+ }
+ wqe->wr.write.raddr = wr->wr.rdma.remote_addr;
+ wqe->wr.write.rtag = wr->wr.rdma.rkey;
+ wqe->bytes = rv;
+ break;
+
+ default:
+ dprint(DBG_WR|DBG_TX,
+ "(QP%d): Opcode %d not yet implemented\n",
+ QP_ID(qp), wr->opcode);
+ rv = -EINVAL;
+ break;
+ }
+ dprint(DBG_WR|DBG_TX, "(QP%d): opcode %d, bytes %d, "
+ "flags 0x%x\n",
+ QP_ID(qp), wr_type(wqe), wqe->bytes,
+ wr_flags(wqe));
+ if (rv < 0)
+ break;
+
+ wqe->wr_status = SR_WR_QUEUED;
+
+ lock_sq_rxsave(qp, flags);
+ list_add_tail(&wqe->list, &qp->sq);
+ atomic_dec(&qp->sq_space);
+ unlock_sq_rxsave(qp, flags);
+
+ wr = wr->next;
+ }
+ /*
+ * Send directly if SQ processing is not in progress.
+ * Eventual immediate errors (rv < 0) do not affect the involved
+ * RI resources (Verbs, 8.3.1) and thus do not prevent from SQ
+ * processing, if new work is already pending. But rv must be passed
+ * to caller.
+ */
+ lock_sq_rxsave(qp, flags);
+
+ if (tx_wqe(qp) == NULL) {
+ struct siw_wqe *next = siw_next_tx_wqe(qp);
+ if (next != NULL) {
+ if (wr_type(next) != SIW_WR_RDMA_READ_REQ ||
+ !ORD_SUSPEND_SQ(qp)) {
+ tx_wqe(qp) = next;
+ if (wr_type(next) != SIW_WR_RDMA_READ_REQ)
+ list_del_init(&next->list);
+ else
+ siw_rreq_queue(next, qp);
+
+ unlock_sq_rxsave(qp, flags);
+
+ dprint(DBG_WR|DBG_TX,
+ "(QP%d): Direct sending...\n",
+ QP_ID(qp));
+
+ if (siw_qp_sq_process(qp, 1) != 0 &&
+ !(qp->tx_ctx.tx_suspend))
+ siw_qp_cm_drop(qp, 0);
+ } else
+ unlock_sq_rxsave(qp, flags);
+ } else
+ unlock_sq_rxsave(qp, flags);
+ } else
+ unlock_sq_rxsave(qp, flags);
+
+ up_read(&qp->state_lock);
+
+ dprint(DBG_WR|DBG_TX, "(QP%d): sq_space(#2)=%d\n", QP_ID(qp),
+ atomic_read(&qp->sq_space));
+ if (rv >= 0)
+ return 0;
+ /*
+ * Immediate error
+ */
+ dprint(DBG_WR|DBG_ON, "(QP%d): error=%d\n", QP_ID(qp), rv);
+
+ if (wqe != NULL)
+ siw_wqe_put(wqe);
+ *bad_wr = wr;
+ return rv;
+}
+
+/*
+ * siw_post_receive()
+ *
+ * Post a list of R-WR's to a RQ.
+ *
+ * @ofa_qp: OFA QP contained in siw QP
+ * @wr: Null terminated list of user WR's
+ * @bad_wr: Points to failing WR in case of synchronous failure.
+ */
+int siw_post_receive(struct ib_qp *ofa_qp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct siw_wqe *wqe = NULL;
+ struct siw_qp *qp = siw_qp_ofa2siw(ofa_qp);
+ unsigned long flags;
+ int rv = 0;
+
+ dprint(DBG_WR|DBG_TX, "(QP%d): state=%d\n", QP_ID(qp),
+ qp->attrs.state);
+
+ if (qp->srq)
+ return -EOPNOTSUPP; /* what else from errno.h? */
+ /*
+ * Acquire a QP state lock for reading. The idea is that a
+ * user cannot move the QP out of RTS during TX/RX processing.
+ */
+ down_read(&qp->state_lock);
+
+ if (qp->attrs.state > SIW_QP_STATE_RTS) {
+ up_read(&qp->state_lock);
+ dprint(DBG_ON, " (QP%d): state=%d\n", QP_ID(qp),
+ qp->attrs.state);
+ return -EINVAL;
+ }
+ while (wr) {
+ /*
+ * NOTE: siw_wqe_get() calls kzalloc(), which may sleep.
+ */
+ if (!atomic_read(&qp->rq_space) ||
+ !(wqe = siw_wqe_get(qp, SIW_WR_RECEIVE))) {
+ dprint(DBG_ON, " siw_wqe_get? (%d)\n",
+ atomic_read(&qp->rq_space));
+ rv = -ENOMEM;
+ break;
+ }
+ if (wr->num_sge > qp->attrs.rq_max_sges) {
+ dprint(DBG_WR|DBG_ON, "(QP%d): Num SGE: %d\n",
+ QP_ID(qp), wr->num_sge);
+ rv = -EINVAL;
+ break;
+ }
+ wr_type(wqe) = SIW_WR_RECEIVE;
+ wr_id(wqe) = wr->wr_id;
+
+ rv = siw_copy_sgl(wr->sg_list, wqe->wr.recv.sge, wr->num_sge);
+ if (rv < 0) {
+ /*
+ * XXX tentatively allow zero length receive
+ */
+ rv = -EINVAL;
+ break;
+ }
+ wqe->wr.recv.num_sge = wr->num_sge;
+ wqe->bytes = rv;
+
+ lock_rq_rxsave(qp, flags);
+
+ list_add_tail(&wqe->list, &qp->rq);
+ wqe->wr_status = SR_WR_QUEUED;
+ atomic_dec(&qp->rq_space);
+
+ unlock_rq_rxsave(qp, flags);
+
+ wr = wr->next;
+ }
+ if (rv <= 0) {
+ dprint(DBG_WR|DBG_ON, "(QP%d): error=%d\n", QP_ID(qp), rv);
+ if (wqe != NULL)
+ siw_wqe_put(wqe);
+ *bad_wr = wr;
+ }
+ dprint(DBG_WR|DBG_RX, "(QP%d): rq_space=%d\n", QP_ID(qp),
+ atomic_read(&qp->rq_space));
+
+ up_read(&qp->state_lock);
+
+ return rv > 0 ? 0 : rv;
+}
+
+int siw_destroy_cq(struct ib_cq *ofa_cq)
+{
+ struct siw_cq *cq = siw_cq_ofa2siw(ofa_cq);
+ struct ib_device *ofa_dev = ofa_cq->device;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+
+ siw_cq_flush(cq);
+
+ siw_remove_obj(&dev->idr_lock, &dev->cq_idr, &cq->hdr);
+ siw_cq_put(cq);
+ atomic_dec(&dev->num_cq);
+ return 0;
+}
+
+/*
+ * siw_create_cq()
+ *
+ * Create CQ of requested size on given device.
+ *
+ * @ofa_dev: OFA device contained in siw device
+ * @size: maximum number of CQE's allowed.
+ * @ib_context: user context.
+ * @udata: used to provide CQ ID back to user.
+ */
+
+struct ib_cq *siw_create_cq(struct ib_device *ofa_dev, int size,
+ int vec /* unused */,
+ struct ib_ucontext *ib_context,
+ struct ib_udata *udata)
+{
+ struct siw_cq *cq = NULL;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_dev);
+ struct siw_uresp_create_cq uresp;
+ int rv;
+
+ if (atomic_inc_return(&dev->num_cq) > SIW_MAX_CQ) {
+ dprint(DBG_ON, ": Out of CQ's\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ if (size < 1 || size > SIW_MAX_CQE) {
+ dprint(DBG_ON, ": CQE: %d\n", size);
+ rv = -EINVAL;
+ goto err_out;
+ }
+ cq = kmalloc(sizeof *cq, GFP_KERNEL);
+ if (!cq) {
+ dprint(DBG_ON, ": kmalloc\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ cq->ofa_cq.cqe = size - 1;
+
+ rv = siw_cq_add(dev, cq);
+ if (rv)
+ goto err_out_idr;
+
+ INIT_LIST_HEAD(&cq->queue);
+ spin_lock_init(&cq->lock);
+ atomic_set(&cq->qlen, 0);
+
+ if (ib_context) {
+ uresp.cq_id = OBJ_ID(cq);
+
+ rv = ib_copy_to_udata(udata, &uresp, sizeof uresp);
+ if (rv)
+ goto err_out_idr;
+ }
+ return &cq->ofa_cq;
+
+err_out_idr:
+ siw_remove_obj(&dev->idr_lock, &dev->cq_idr, &cq->hdr);
+err_out:
+ dprint(DBG_OBJ, ": CQ creation failed\n");
+
+ kfree(cq);
+ atomic_dec(&dev->num_cq);
+
+ return ERR_PTR(rv);
+}
+
+/*
+ * siw_poll_cq()
+ *
+ * Reap CQ entries if available and copy work completion status into
+ * array of WC's provided by caller. Returns number of reaped CQE's.
+ *
+ * @ofa_cq: OFA CQ contained in siw CQ.
+ * @num_cqe: Maximum number of CQE's to reap.
+ * @wc: Array of work completions to be filled by siw.
+ */
+int siw_poll_cq(struct ib_cq *ofa_cq, int num_cqe, struct ib_wc *wc)
+{
+ struct siw_cq *cq = siw_cq_ofa2siw(ofa_cq);
+ int i;
+
+ for (i = 0; i < num_cqe; i++) {
+ if (!(siw_reap_cqe(cq, wc)))
+ break;
+ wc++;
+ }
+ dprint(DBG_WR, " CQ%d: reap %d comletions (%d left)\n",
+ OBJ_ID(cq), i, atomic_read(&cq->qlen));
+
+ return i;
+}
+
+/*
+ * siw_req_notify_cq()
+ *
+ * Request notification for new CQE's added to that CQ.
+ * Defined flags:
+ * o SIW_CQ_NOTIFY_SOLICITED lets siw trigger a notification
+ * event if a WQE with notification flag set enters the CQ
+ * o SIW_CQ_NOTIFY_NEXT_COMP lets siw trigger a notification
+ * event if a WQE enters the CQ.
+ * o IB_CQ_REPORT_MISSED_EVENTS: return value will provide the
+ * number of not reaped CQE's regardless of its notification
+ * type and current or new CQ notification settings.
+ *
+ * @ofa_cq: OFA CQ contained in siw CQ.
+ * @flags: Requested notification flags.
+ */
+int siw_req_notify_cq(struct ib_cq *ofa_cq, enum ib_cq_notify_flags flags)
+{
+ struct siw_cq *cq = siw_cq_ofa2siw(ofa_cq);
+
+ dprint(DBG_EH, "(CQ%d:) flags: 0x%8x\n", OBJ_ID(cq), flags);
+
+ if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
+ cq->notify = SIW_CQ_NOTIFY_SOLICITED;
+ else
+ cq->notify = SIW_CQ_NOTIFY_ALL;
+
+ if (flags & IB_CQ_REPORT_MISSED_EVENTS)
+ return atomic_read(&cq->qlen);
+
+ return 0;
+}
+
+/*
+ * siw_dereg_mr()
+ *
+ * Release Memory Region.
+ *
+ * TODO: Update function if Memory Windows are supported by siw:
+ * Is OFED core checking for MW dependencies for current
+ * MR before calling MR deregistration?.
+ *
+ * @ofa_mr: OFA MR contained in siw MR.
+ */
+int siw_dereg_mr(struct ib_mr *ofa_mr)
+{
+ struct siw_mr *mr;
+ struct siw_dev *dev = siw_dev_ofa2siw(ofa_mr->device);
+
+ mr = siw_mr_ofa2siw(ofa_mr);
+
+ dprint(DBG_OBJ|DBG_MM, "(MEM%d): Release UMem %p, #ref's: %d\n",
+ mr->mem.hdr.id, mr->umem,
+ atomic_read(&mr->mem.hdr.ref.refcount));
+
+ mr->mem.stag_state = STAG_INVALID;
+
+ siw_pd_put(mr->pd);
+ siw_remove_obj(&dev->idr_lock, &dev->mem_idr, &mr->mem.hdr);
+ siw_mem_put(&mr->mem);
+
+ atomic_dec(&dev->num_mem);
+ return 0;
+}
+
+/*
+ * siw_reg_user_mr()
+ *
+ * Register Memory Region.
+ *
+ * @ofa_pd: OFA PD contained in siw PD.
+ * @start: starting address of MR (virtual address)
+ * @len: len of MR
+ * @rnic_va: not used by siw
+ * @rights: MR access rights
+ * @udata: user buffer to communicate STag and Key.
+ */
+struct ib_mr *siw_reg_user_mr(struct ib_pd *ofa_pd, u64 start, u64 len,
+ u64 rnic_va, int rights, struct ib_udata *udata)
+{
+ struct siw_mr *mr = NULL;
+ struct siw_pd *pd = siw_pd_ofa2siw(ofa_pd);
+ struct ib_umem *umem = NULL;
+ struct siw_ureq_reg_mr ureq;
+ struct siw_uresp_reg_mr uresp;
+ struct siw_dev *dev = pd->hdr.dev;
+ int rv;
+
+ dprint(DBG_MM|DBG_OBJ, " start: 0x%016llx, "
+ "va: 0x%016llx, len: %llu, ctx: %p\n",
+ (unsigned long long)start,
+ (unsigned long long)rnic_va,
+ (unsigned long long)len,
+ ofa_pd->uobject->context);
+
+ if (atomic_inc_return(&dev->num_mem) > SIW_MAX_MR) {
+ dprint(DBG_ON, ": Out of MRs: %d\n",
+ atomic_read(&dev->num_mem));
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ if (!len) {
+ rv = -EINVAL;
+ goto err_out;
+ }
+
+ umem = ib_umem_get(ofa_pd->uobject->context, start, len, rights, 0);
+ if (IS_ERR(umem)) {
+ dprint(DBG_MM, " ib_umem_get:%ld LOCKED:%lu, LIMIT:%lu\n",
+ PTR_ERR(umem), current->mm->locked_vm,
+ current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >>
+ PAGE_SHIFT);
+ rv = -PTR_ERR(umem);
+ umem = NULL;
+ goto err_out;
+ }
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr) {
+ dprint(DBG_ON, ": malloc\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ mr->mem.stag_state = STAG_INVALID;
+
+ if (siw_mem_add(dev, &mr->mem) < 0) {
+ dprint(DBG_ON, ": siw_mem_add\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ dprint(DBG_OBJ|DBG_MM, "(MEM%d): New Object, UMEM %p\n",
+ mr->mem.hdr.id, umem);
+
+ mr->ofa_mr.lkey = mr->ofa_mr.rkey = mr->mem.hdr.id << 8;
+
+ mr->mem.va = start;
+ mr->mem.len = len;
+ mr->mem.fbo = 0 ;
+ mr->mem.mr = NULL;
+ mr->mem.perms = SR_MEM_LREAD | /* not selectable in OFA */
+ (rights & IB_ACCESS_REMOTE_READ ? SR_MEM_RREAD : 0) |
+ (rights & IB_ACCESS_LOCAL_WRITE ? SR_MEM_LWRITE : 0) |
+ (rights & IB_ACCESS_REMOTE_WRITE ? SR_MEM_RWRITE : 0);
+
+ mr->umem = umem;
+
+ if (udata) {
+ rv = ib_copy_from_udata(&ureq, udata, sizeof ureq);
+ if (rv)
+ goto err_out_idr;
+
+ mr->ofa_mr.lkey |= ureq.stag_key;
+ mr->ofa_mr.rkey |= ureq.stag_key; /* XXX ??? */
+ uresp.stag = mr->ofa_mr.lkey;
+
+ rv = ib_copy_to_udata(udata, &uresp, sizeof uresp);
+ if (rv)
+ goto err_out_idr;
+ }
+ mr->pd = pd;
+ siw_pd_get(pd);
+
+ mr->mem.stag_state = STAG_VALID;
+
+ return &mr->ofa_mr;
+
+err_out_idr:
+ siw_remove_obj(&dev->idr_lock, &dev->mem_idr, &mr->mem.hdr);
+err_out:
+ if (umem)
+ ib_umem_release(umem);
+
+ kfree(mr);
+
+ atomic_dec(&dev->num_mem);
+
+ return ERR_PTR(rv);
+}
+
+/*
+ * siw_create_srq()
+ *
+ * Create Shared Receive Queue of attributes @init_attrs
+ * within protection domain given by @ofa_pd.
+ *
+ * @ofa_pd: OFA PD contained in siw PD.
+ * @init_attrs: SRQ init attributes.
+ * @udata: not used by siw.
+ */
+struct ib_srq *siw_create_srq(struct ib_pd *ofa_pd,
+ struct ib_srq_init_attr *init_attrs,
+ struct ib_udata *udata)
+{
+ struct siw_srq *srq = NULL;
+ struct ib_srq_attr *attrs = &init_attrs->attr;
+ struct siw_pd *pd = siw_pd_ofa2siw(ofa_pd);
+ struct siw_dev *dev = pd->hdr.dev;
+ int rv;
+
+ if (atomic_inc_return(&dev->num_srq) > SIW_MAX_SRQ) {
+ dprint(DBG_ON, " Out of SRQ's\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ if (attrs->max_wr > SIW_MAX_SRQ_WR || attrs->max_sge > SIW_MAX_SGE ||
+ attrs->srq_limit > attrs->max_wr) {
+ rv = -EINVAL;
+ goto err_out;
+ }
+
+ srq = kmalloc(sizeof *srq, GFP_KERNEL);
+ if (!srq) {
+ dprint(DBG_ON, " malloc\n");
+ rv = -ENOMEM;
+ goto err_out;
+ }
+ INIT_LIST_HEAD(&srq->rq);
+ srq->max_sge = attrs->max_sge;
+ atomic_set(&srq->space, attrs->max_wr);
+ srq->limit = attrs->srq_limit;
+ if (srq->limit)
+ srq->armed = 1;
+
+ srq->pd = pd;
+ siw_pd_get(pd);
+
+ spin_lock_init(&srq->lock);
+
+ return &srq->ofa_srq;
+
+err_out:
+ kfree(srq);
+ atomic_dec(&dev->num_srq);
+
+ return ERR_PTR(rv);
+}
+
+/*
+ * siw_modify_srq()
+ *
+ * Modify SRQ. The caller may resize SRQ and/or set/reset notification
+ * limit and (re)arm IB_EVENT_SRQ_LIMIT_REACHED notification.
+ *
+ * NOTE: it is unclear if OFA allows for changing the MAX_SGE
+ * parameter. siw_modify_srq() does not check the attrs->max_sge param.
+ */
+int siw_modify_srq(struct ib_srq *ofa_srq, struct ib_srq_attr *attrs,
+ enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
+{
+ struct siw_srq *srq = siw_srq_ofa2siw(ofa_srq);
+ unsigned long flags;
+ int rv = 0;
+
+ lock_srq_rxsave(srq, flags);
+
+ if (attr_mask & IB_SRQ_MAX_WR) {
+ /* resize request */
+ if (attrs->max_wr > SIW_MAX_SRQ_WR) {
+ rv = -EINVAL;
+ goto out;
+ }
+ if (attrs->max_wr < srq->max_wr) { /* shrink */
+ if (attrs->max_wr <
+ srq->max_wr - atomic_read(&srq->space)) {
+ rv = -EBUSY;
+ goto out;
+ }
+ atomic_sub(srq->max_wr - attrs->max_wr, &srq->space);
+ } else /* grow */
+ atomic_add(attrs->max_wr - srq->max_wr, &srq->space);
+ srq->max_wr = attrs->max_wr;
+ }
+ if (attr_mask & IB_SRQ_LIMIT) {
+ if (attrs->srq_limit) {
+ if (attrs->srq_limit > srq->max_wr) {
+ rv = -EINVAL;
+ /* FIXME: restore old space & max_wr?? */
+ goto out;
+ }
+ srq->armed = 1;
+ } else
+ srq->armed = 0;
+
+ srq->limit = attrs->srq_limit;
+ }
+out:
+ unlock_srq_rxsave(srq, flags);
+ return rv;
+}
+
+/*
+ * siw_query_srq()
+ *
+ * Query SRQ attributes.
+ */
+int siw_query_srq(struct ib_srq *ofa_srq, struct ib_srq_attr *attrs)
+{
+ struct siw_srq *srq = siw_srq_ofa2siw(ofa_srq);
+ unsigned long flags;
+
+ lock_srq_rxsave(srq, flags);
+
+ attrs->max_wr = srq->max_wr;
+ attrs->max_sge = srq->max_sge;
+ attrs->srq_limit = srq->limit;
+
+ unlock_srq_rxsave(srq, flags);
+
+ return 0;
+}
+
+/*
+ * siw_destroy_srq()
+ *
+ * Destroy SRQ.
+ * SRQ WQE's are silently destroyed, since not belonging to any QP.
+ * Furthermore, it is assumed that the SRQ is not referenced by any
+ * QP anymore - the code trusts the OFA environment to keep track
+ * of QP references.
+ */
+int siw_destroy_srq(struct ib_srq *ofa_srq)
+{
+ struct list_head *listp, *tmp;
+ struct siw_srq *srq = siw_srq_ofa2siw(ofa_srq);
+ struct siw_dev *dev = srq->pd->hdr.dev;
+ unsigned long flags;
+
+ lock_srq_rxsave(srq, flags); /* probably not necessary */
+ list_for_each_safe(listp, tmp, &srq->rq) {
+ list_del(listp);
+ siw_wqe_put(list_entry(listp, struct siw_wqe, list));
+ }
+ unlock_srq_rxsave(srq, flags);
+
+ siw_pd_put(srq->pd);
+ kfree(srq);
+ atomic_dec(&dev->num_srq);
+
+ return 0;
+}
+
+/*
+ * siw_post_srq_recv()
+ *
+ * Post a list of receive queue elements to SRQ.
+ * NOTE: The function does not check or lock a certain SRQ state
+ * during the post operation. The code simply trusts the
+ * OFA environment.
+ *
+ * @ofa_srq: OFA SRQ contained in siw SRQ
+ * @wr: List of R-WR's
+ * @bad_wr: Updated to failing WR if posting fails.
+ */
+int siw_post_srq_recv(struct ib_srq *ofa_srq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct siw_srq *srq = siw_srq_ofa2siw(ofa_srq);
+ struct siw_wqe *wqe = NULL;
+ unsigned long flags;
+ int rv = 0;
+
+ while (wr) {
+ if (!atomic_read(&srq->space) ||
+ !(wqe = siw_srq_wqe_get(srq))) {
+ dprint(DBG_ON, " siw_srq_wqe_get\n");
+ rv = -ENOMEM;
+ break;
+ }
+ if (!wr->num_sge || wr->num_sge > srq->max_sge) {
+ dprint(DBG_WR|DBG_ON,
+ "(SRQ%p): Num SGE: %d\n", srq, wr->num_sge);
+ rv = -EINVAL;
+ break;
+ }
+ wr_type(wqe) = SIW_WR_RECEIVE;
+ wr_id(wqe) = wr->wr_id;
+ wqe->wr_status = SR_WR_QUEUED;
+
+ rv = siw_copy_sgl(wr->sg_list, wqe->wr.recv.sge, wr->num_sge);
+ if (rv == 0) {
+ /*
+ * do not allow zero length receive
+ * XXX correct?
+ */
+ rv = -EINVAL;
+ break;
+ }
+ wqe->wr.recv.num_sge = wr->num_sge;
+ wqe->bytes = rv;
+
+ lock_srq_rxsave(srq, flags);
+
+ list_add_tail(&wqe->list, &srq->rq);
+ atomic_dec(&srq->space);
+
+ unlock_srq_rxsave(srq, flags);
+
+ wr = wr->next;
+ }
+ if (rv <= 0) {
+ dprint(DBG_WR|DBG_ON, "(SRQ %p): error=%d\n",
+ srq, rv);
+
+ if (wqe != NULL)
+ siw_wqe_put(wqe);
+ *bad_wr = wr;
+ }
+ dprint(DBG_WR|DBG_RX, "(SRQ%p): space=%d\n",
+ srq, atomic_read(&srq->space));
+
+ return rv > 0 ? 0 : rv;
+}
+
+
+struct ib_mr *siw_get_dma_mr(struct ib_pd *pd, int rights)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+int siw_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma)
+{
+ return -ENOSYS;
+}
diff --git a/drivers/infiniband/hw/siw/siw_verbs.h b/drivers/infiniband/hw/siw/siw_verbs.h
new file mode 100644
index 0000000..53eac4f
--- /dev/null
+++ b/drivers/infiniband/hw/siw/siw_verbs.h
@@ -0,0 +1,96 @@
+/*
+ * Software iWARP device driver for Linux
+ *
+ * Authors: Bernard Metzler <bmt@...ich.ibm.com>
+ *
+ * Copyright (c) 2008-2010, IBM Corporation
+ *
+ * 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
+ * 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.
+ *
+ * - Neither the name of IBM nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * 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.
+ */
+
+#ifndef _SIW_VERBS_H
+#define _SIW_VERBS_H
+
+#include <linux/errno.h>
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+
+#include "siw.h"
+#include "siw_cm.h"
+
+extern int siw_query_device(struct ib_device *, struct ib_device_attr *);
+
+extern struct ib_ucontext *siw_alloc_ucontext(struct ib_device *,
+ struct ib_udata *);
+extern int siw_dealloc_ucontext(struct ib_ucontext *);
+extern int siw_query_port(struct ib_device *, u8, struct ib_port_attr *);
+extern int siw_query_pkey(struct ib_device *, u8, u16, u16 *);
+extern int siw_query_gid(struct ib_device *, u8, int, union ib_gid *);
+
+extern struct ib_pd *siw_alloc_pd(struct ib_device *, struct ib_ucontext *,
+ struct ib_udata *);
+extern int siw_dealloc_pd(struct ib_pd *);
+extern struct ib_ah *siw_create_ah(struct ib_pd *, struct ib_ah_attr *);
+extern int siw_destroy_ah(struct ib_ah *);
+extern struct ib_qp *siw_create_qp(struct ib_pd *, struct ib_qp_init_attr *,
+ struct ib_udata *);
+extern int siw_query_qp(struct ib_qp *, struct ib_qp_attr *, int,
+ struct ib_qp_init_attr *);
+extern int siw_ofed_modify_qp(struct ib_qp *, struct ib_qp_attr *, int,
+ struct ib_udata *);
+extern int siw_destroy_qp(struct ib_qp *);
+extern int siw_post_send(struct ib_qp *, struct ib_send_wr *,
+ struct ib_send_wr **);
+extern int siw_post_receive(struct ib_qp *, struct ib_recv_wr *,
+ struct ib_recv_wr **);
+extern struct ib_cq *siw_create_cq(struct ib_device *, int, int,
+ struct ib_ucontext *, struct ib_udata *);
+extern int siw_destroy_cq(struct ib_cq *);
+extern int siw_poll_cq(struct ib_cq *, int num_entries, struct ib_wc *);
+extern int siw_req_notify_cq(struct ib_cq *, enum ib_cq_notify_flags);
+extern struct ib_mr *siw_reg_user_mr(struct ib_pd *, u64, u64, u64, int,
+ struct ib_udata *);
+extern struct ib_mr *siw_get_dma_mr(struct ib_pd *, int);
+extern int siw_dereg_mr(struct ib_mr *);
+extern struct ib_srq *siw_create_srq(struct ib_pd *, struct ib_srq_init_attr *,
+ struct ib_udata *);
+extern int siw_modify_srq(struct ib_srq *, struct ib_srq_attr *,
+ enum ib_srq_attr_mask, struct ib_udata *);
+extern int siw_query_srq(struct ib_srq *, struct ib_srq_attr *);
+extern int siw_destroy_srq(struct ib_srq *);
+extern int siw_post_srq_recv(struct ib_srq *, struct ib_recv_wr *,
+ struct ib_recv_wr **);
+extern int siw_mmap(struct ib_ucontext *, struct vm_area_struct *);
+
+#endif
--
1.5.4.3
--
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