new file mode 100644
@@ -0,0 +1,1461 @@
+/*
+ * Copyright (c) 2015 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 "rxe.h"
+#include "rxe_loc.h"
+#include "rxe_queue.h"
+
+static int rxe_query_device(struct ib_device *dev,
+ struct ib_device_attr *attr,
+ struct ib_udata *uhw)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+
+ if (uhw->inlen || uhw->outlen)
+ return -EINVAL;
+
+ *attr = rxe->attr;
+ return 0;
+}
+
+static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
+ u8 *active_width)
+{
+ if (speed <= 1000) {
+ *active_width = IB_WIDTH_1X;
+ *active_speed = IB_SPEED_SDR;
+ } else if (speed <= 10000) {
+ *active_width = IB_WIDTH_1X;
+ *active_speed = IB_SPEED_FDR10;
+ } else if (speed <= 20000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_DDR;
+ } else if (speed <= 30000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_QDR;
+ } else if (speed <= 40000) {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_FDR10;
+ } else {
+ *active_width = IB_WIDTH_4X;
+ *active_speed = IB_SPEED_EDR;
+ }
+}
+
+static int rxe_query_port(struct ib_device *dev,
+ u8 port_num, struct ib_port_attr *attr)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+ struct rxe_port *port;
+ struct ethtool_cmd cmd;
+
+ if (unlikely(port_num < 1 || port_num > rxe->num_ports)) {
+ pr_warn("invalid port_number %d\n", port_num);
+ goto err1;
+ }
+
+ port = &rxe->port[port_num - 1];
+
+ *attr = port->attr;
+
+ mutex_lock(&rxe->usdev_lock);
+ rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
+ rxe_eth_speed_to_ib_speed(cmd.speed, &attr->active_speed,
+ &attr->active_width);
+ mutex_unlock(&rxe->usdev_lock);
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+static int rxe_query_gid(struct ib_device *device,
+ u8 port_num, int index, union ib_gid *gid)
+{
+ int ret;
+
+ if (index > RXE_PORT_GID_TBL_LEN)
+ return -EINVAL;
+
+ ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
+ if (ret == -EAGAIN) {
+ memcpy(gid, &zgid, sizeof(*gid));
+ return 0;
+ }
+
+ return ret;
+}
+
+static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
+ index, const union ib_gid *gid,
+ const struct ib_gid_attr *attr, void **context)
+{
+ return 0;
+}
+
+static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
+ index, void **context)
+{
+ return 0;
+}
+
+static struct net_device *rxe_get_netdev(struct ib_device *device,
+ u8 port_num)
+{
+ struct rxe_dev *rxe = to_rdev(device);
+
+ if (rxe->ndev)
+ return rxe->ndev;
+
+ return NULL;
+}
+
+static int rxe_query_pkey(struct ib_device *device,
+ u8 port_num, u16 index, u16 *pkey)
+{
+ struct rxe_dev *rxe = to_rdev(device);
+ struct rxe_port *port;
+
+ if (unlikely(port_num < 1 || port_num > rxe->num_ports)) {
+ dev_warn(device->dma_device, "invalid port_num = %d\n",
+ port_num);
+ goto err1;
+ }
+
+ port = &rxe->port[port_num - 1];
+
+ if (unlikely(index >= port->attr.pkey_tbl_len)) {
+ dev_warn(device->dma_device, "invalid index = %d\n",
+ index);
+ goto err1;
+ }
+
+ *pkey = port->pkey_tbl[index];
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+static int rxe_modify_device(struct ib_device *dev,
+ int mask, struct ib_device_modify *attr)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+
+ if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
+ rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
+
+ if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
+ memcpy(rxe->ib_dev.node_desc,
+ attr->node_desc, sizeof(rxe->ib_dev.node_desc));
+ }
+
+ return 0;
+}
+
+static int rxe_modify_port(struct ib_device *dev,
+ u8 port_num, int mask, struct ib_port_modify *attr)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+ struct rxe_port *port;
+
+ if (unlikely(port_num < 1 || port_num > rxe->num_ports)) {
+ pr_warn("invalid port_num = %d\n", port_num);
+ goto err1;
+ }
+
+ port = &rxe->port[port_num - 1];
+
+ port->attr.port_cap_flags |= attr->set_port_cap_mask;
+ port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
+
+ if (mask & IB_PORT_RESET_QKEY_CNTR)
+ port->attr.qkey_viol_cntr = 0;
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
+ u8 port_num)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+
+ return rxe->ifc_ops->link_layer(rxe, port_num);
+}
+
+static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
+ struct ib_udata *udata)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+ struct rxe_ucontext *uc;
+
+ uc = rxe_alloc(&rxe->uc_pool);
+ return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
+}
+
+static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
+{
+ struct rxe_ucontext *uc = to_ruc(ibuc);
+
+ rxe_drop_ref(uc);
+ return 0;
+}
+
+static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ int err;
+ struct ib_port_attr attr;
+
+ err = rxe_query_port(dev, port_num, &attr);
+ if (err)
+ return err;
+
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+ immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
+ immutable->max_mad_size = IB_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct rxe_dev *rxe = to_rdev(dev);
+ struct rxe_pd *pd;
+
+ pd = rxe_alloc(&rxe->pd_pool);
+ return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
+}
+
+static int rxe_dealloc_pd(struct ib_pd *ibpd)
+{
+ struct rxe_pd *pd = to_rpd(ibpd);
+
+ rxe_drop_ref(pd);
+ return 0;
+}
+
+static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr,
+ union ib_gid *sgid, struct ib_gid_attr *sgid_attr,
+ struct rxe_av *av)
+{
+ int err;
+
+ err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num,
+ attr->grh.sgid_index, sgid,
+ sgid_attr);
+ if (err) {
+ pr_err("Failed to query sgid. err = %d\n", err);
+ return err;
+ }
+
+ err = rxe_av_from_attr(rxe, attr->port_num, av, attr);
+ if (err)
+ return err;
+
+ err = rxe_av_fill_ip_info(rxe, av, attr, sgid_attr, sgid);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_ah *ah;
+ union ib_gid sgid;
+ struct ib_gid_attr sgid_attr;
+
+ err = rxe_av_chk_attr(rxe, attr);
+ if (err)
+ goto err1;
+
+ ah = rxe_alloc(&rxe->ah_pool);
+ if (!ah) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_ref(pd);
+ ah->pd = pd;
+
+ err = rxe_init_av(rxe, attr, &sgid, &sgid_attr, &ah->av);
+ if (err)
+ goto err2;
+
+ return &ah->ibah;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_ref(ah);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibah->device);
+ struct rxe_ah *ah = to_rah(ibah);
+ union ib_gid sgid;
+ struct ib_gid_attr sgid_attr;
+
+ err = rxe_av_chk_attr(rxe, attr);
+ if (err)
+ return err;
+
+ err = rxe_init_av(rxe, attr, &sgid, &sgid_attr, &ah->av);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
+{
+ struct rxe_dev *rxe = to_rdev(ibah->device);
+ struct rxe_ah *ah = to_rah(ibah);
+
+ rxe_av_to_attr(rxe, &ah->av, attr);
+ return 0;
+}
+
+static int rxe_destroy_ah(struct ib_ah *ibah)
+{
+ struct rxe_ah *ah = to_rah(ibah);
+
+ rxe_drop_ref(ah->pd);
+ rxe_drop_ref(ah);
+ return 0;
+}
+
+static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
+{
+ int err;
+ int i;
+ u32 length;
+ struct rxe_recv_wqe *recv_wqe;
+ int num_sge = ibwr->num_sge;
+
+ if (unlikely(queue_full(rq->queue))) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ if (unlikely(num_sge > rq->max_sge)) {
+ err = -EINVAL;
+ goto err1;
+ }
+
+ length = 0;
+ for (i = 0; i < num_sge; i++)
+ length += ibwr->sg_list[i].length;
+
+ recv_wqe = producer_addr(rq->queue);
+ recv_wqe->wr_id = ibwr->wr_id;
+ recv_wqe->num_sge = num_sge;
+
+ memcpy(recv_wqe->dma.sge, ibwr->sg_list,
+ num_sge * sizeof(struct ib_sge));
+
+ recv_wqe->dma.length = length;
+ recv_wqe->dma.resid = length;
+ recv_wqe->dma.num_sge = num_sge;
+ recv_wqe->dma.cur_sge = 0;
+ recv_wqe->dma.sge_offset = 0;
+
+ /* make sure all changes to the work queue are written before we
+ * update the producer pointer
+ */
+ smp_wmb();
+
+ advance_producer(rq->queue);
+ return 0;
+
+err1:
+ return err;
+}
+
+static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *init,
+ struct ib_udata *udata)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_srq *srq;
+ struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
+
+ err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
+ if (err)
+ goto err1;
+
+ srq = rxe_alloc(&rxe->srq_pool);
+ if (!srq) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(srq);
+ rxe_add_ref(pd);
+ srq->pd = pd;
+
+ err = rxe_srq_from_init(rxe, srq, init, context, udata);
+ if (err)
+ goto err2;
+
+ return &srq->ibsrq;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(srq);
+ rxe_drop_ref(srq);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask mask,
+ struct ib_udata *udata)
+{
+ int err;
+ struct rxe_srq *srq = to_rsrq(ibsrq);
+ struct rxe_dev *rxe = to_rdev(ibsrq->device);
+
+ err = rxe_srq_chk_attr(rxe, srq, attr, mask);
+ if (err)
+ goto err1;
+
+ err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
+ if (err)
+ goto err1;
+
+ return 0;
+
+err1:
+ return err;
+}
+
+static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
+{
+ struct rxe_srq *srq = to_rsrq(ibsrq);
+
+ if (srq->error)
+ return -EINVAL;
+
+ attr->max_wr = srq->rq.queue->buf->index_mask;
+ attr->max_sge = srq->rq.max_sge;
+ attr->srq_limit = srq->limit;
+ return 0;
+}
+
+static int rxe_destroy_srq(struct ib_srq *ibsrq)
+{
+ struct rxe_srq *srq = to_rsrq(ibsrq);
+
+ if (srq->cq)
+ rxe_drop_ref(srq->cq);
+
+ if(srq->rq.queue)
+ rxe_queue_cleanup(srq->rq.queue);
+
+ rxe_drop_ref(srq->pd);
+ rxe_drop_index(srq);
+ rxe_drop_ref(srq);
+
+ return 0;
+}
+
+static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ int err = 0;
+ unsigned long flags;
+ struct rxe_srq *srq = to_rsrq(ibsrq);
+
+ spin_lock_irqsave(&srq->rq.producer_lock, flags);
+
+ while (wr) {
+ err = post_one_recv(&srq->rq, wr);
+ if (unlikely(err))
+ break;
+ wr = wr->next;
+ }
+
+ spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
+
+ if (err)
+ *bad_wr = wr;
+
+ return err;
+}
+
+static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init,
+ struct ib_udata *udata)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_qp *qp;
+
+ err = rxe_qp_chk_init(rxe, init);
+ if (err)
+ goto err1;
+
+ qp = rxe_alloc(&rxe->qp_pool);
+ if (!qp) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(qp);
+
+ if (udata)
+ qp->is_user = 1;
+
+ err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
+ if (err)
+ goto err2;
+
+ return &qp->ibqp;
+
+err2:
+ rxe_drop_index(qp);
+ rxe_drop_ref(qp);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int mask, struct ib_udata *udata)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibqp->device);
+ struct rxe_qp *qp = to_rqp(ibqp);
+
+ err = rxe_qp_chk_attr(rxe, qp, attr, mask);
+ if (err)
+ goto err1;
+
+ err = rxe_qp_from_attr(qp, attr, mask, udata);
+ if (err)
+ goto err1;
+
+ return 0;
+
+err1:
+ return err;
+}
+
+static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int mask, struct ib_qp_init_attr *init)
+{
+ struct rxe_qp *qp = to_rqp(ibqp);
+
+ rxe_qp_to_init(qp, init);
+ rxe_qp_to_attr(qp, attr, mask);
+
+ return 0;
+}
+
+static int rxe_destroy_qp(struct ib_qp *ibqp)
+{
+ struct rxe_qp *qp = to_rqp(ibqp);
+
+ rxe_qp_destroy(qp);
+ rxe_drop_index(qp);
+ rxe_drop_ref(qp);
+ return 0;
+}
+
+static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
+ unsigned int mask, unsigned int length)
+{
+ int num_sge = ibwr->num_sge;
+ struct rxe_sq *sq = &qp->sq;
+
+ if (unlikely(num_sge > sq->max_sge))
+ goto err1;
+
+ if (unlikely(mask & WR_ATOMIC_MASK)) {
+ if (length < 8)
+ goto err1;
+
+ if (ibwr->wr.atomic.remote_addr & 0x7)
+ goto err1;
+ }
+
+ if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
+ (length > sq->max_inline)))
+ goto err1;
+
+ return 0;
+
+err1:
+ return -EINVAL;
+}
+
+static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
+ struct ib_send_wr *ibwr)
+{
+ wr->wr_id = ibwr->wr_id;
+ wr->num_sge = ibwr->num_sge;
+ wr->opcode = ibwr->opcode;
+ wr->send_flags = ibwr->send_flags;
+
+ if (qp_type(qp) == IB_QPT_UD ||
+ qp_type(qp) == IB_QPT_SMI ||
+ qp_type(qp) == IB_QPT_GSI) {
+ wr->wr.ud.remote_qpn = ibwr->wr.ud.remote_qpn;
+ wr->wr.ud.remote_qkey = ibwr->wr.ud.remote_qkey;
+ if (qp_type(qp) == IB_QPT_GSI)
+ wr->wr.ud.pkey_index = ibwr->wr.ud.pkey_index;
+ if (wr->opcode == IB_WR_SEND_WITH_IMM)
+ wr->ex.imm_data = ibwr->ex.imm_data;
+ } else {
+ switch (wr->opcode) {
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ wr->ex.imm_data = ibwr->ex.imm_data;
+ case IB_WR_RDMA_READ:
+ case IB_WR_RDMA_WRITE:
+ wr->wr.rdma.remote_addr = ibwr->wr.rdma.remote_addr;
+ wr->wr.rdma.rkey = ibwr->wr.rdma.rkey;
+ break;
+ case IB_WR_SEND_WITH_IMM:
+ wr->ex.imm_data = ibwr->ex.imm_data;
+ break;
+ case IB_WR_SEND_WITH_INV:
+ wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
+ break;
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ wr->wr.atomic.remote_addr =
+ ibwr->wr.atomic.remote_addr;
+ wr->wr.atomic.compare_add =
+ ibwr->wr.atomic.compare_add;
+ wr->wr.atomic.swap = ibwr->wr.atomic.swap;
+ wr->wr.atomic.rkey = ibwr->wr.atomic.rkey;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
+ unsigned int mask, unsigned int length,
+ struct rxe_send_wqe *wqe)
+{
+ int num_sge = ibwr->num_sge;
+ struct ib_sge *sge;
+ int i;
+ u8 *p;
+
+ init_send_wr(qp, &wqe->wr, ibwr);
+
+ if (qp_type(qp) == IB_QPT_UD ||
+ qp_type(qp) == IB_QPT_SMI ||
+ qp_type(qp) == IB_QPT_GSI)
+ memcpy(&wqe->av, &to_rah(ibwr->wr.ud.ah)->av, sizeof(wqe->av));
+
+ if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
+ p = wqe->dma.inline_data;
+
+ sge = ibwr->sg_list;
+ for (i = 0; i < num_sge; i++, sge++) {
+ if (qp->is_user && copy_from_user(p, (__user void *)
+ (uintptr_t)sge->addr, sge->length))
+ return -EFAULT;
+
+ else if (!qp->is_user)
+ memcpy(p, (void *)(uintptr_t)sge->addr,
+ sge->length);
+
+ p += sge->length;
+ }
+ } else
+ memcpy(wqe->dma.sge, ibwr->sg_list,
+ num_sge * sizeof(struct ib_sge));
+
+ wqe->iova = (mask & WR_ATOMIC_MASK) ?
+ ibwr->wr.atomic.remote_addr :
+ ibwr->wr.rdma.remote_addr;
+ wqe->mask = mask;
+ wqe->dma.length = length;
+ wqe->dma.resid = length;
+ wqe->dma.num_sge = num_sge;
+ wqe->dma.cur_sge = 0;
+ wqe->dma.sge_offset = 0;
+ wqe->state = wqe_state_posted;
+ wqe->ssn = atomic_add_return(1, &qp->ssn);
+
+ return 0;
+}
+
+static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
+ unsigned mask, u32 length)
+{
+ int err;
+ struct rxe_sq *sq = &qp->sq;
+ struct rxe_send_wqe *send_wqe;
+ unsigned long flags;
+
+ err = validate_send_wr(qp, ibwr, mask, length);
+ if (err)
+ return err;
+
+ spin_lock_irqsave(&qp->sq.sq_lock, flags);
+
+ if (unlikely(queue_full(sq->queue))) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ send_wqe = producer_addr(sq->queue);
+
+ err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
+ if (unlikely(err))
+ goto err1;
+
+ /* make sure all changes to the work queue are
+ written before we update the producer pointer */
+ smp_wmb();
+
+ advance_producer(sq->queue);
+ spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
+
+ return 0;
+
+err1:
+ spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
+ return err;
+}
+
+static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ int err = 0;
+ struct rxe_qp *qp = to_rqp(ibqp);
+ unsigned int mask;
+ unsigned int length = 0;
+ int i;
+ int must_sched;
+
+ if (unlikely(!qp->valid)) {
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+
+ if (unlikely(qp->req.state < QP_STATE_READY)) {
+ *bad_wr = wr;
+ return -EINVAL;
+ }
+
+ while (wr) {
+ mask = wr_opcode_mask(wr->opcode, qp);
+ if (unlikely(!mask)) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ break;
+ }
+
+ if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
+ !(mask & WR_INLINE_MASK))) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ break;
+ }
+
+ length = 0;
+ for (i = 0; i < wr->num_sge; i++)
+ length += wr->sg_list[i].length;
+
+ err = post_one_send(qp, wr, mask, length);
+
+ if (err) {
+ *bad_wr = wr;
+ break;
+ }
+ wr = wr->next;
+ }
+
+ /*
+ * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
+ * and the requester call ip_local_out_sk() that takes spin_lock_bh.
+ */
+ must_sched = (qp_type(qp) == IB_QPT_GSI) ||
+ (queue_count(qp->sq.queue) > 1);
+
+ rxe_run_task(&qp->req.task, must_sched);
+
+ return err;
+}
+
+static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ int err = 0;
+ struct rxe_qp *qp = to_rqp(ibqp);
+ struct rxe_rq *rq = &qp->rq;
+ unsigned long flags;
+
+ if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
+ *bad_wr = wr;
+ err = -EINVAL;
+ goto err1;
+ }
+
+ if (unlikely(qp->srq)) {
+ *bad_wr = wr;
+ err = -EINVAL;
+ goto err1;
+ }
+
+ spin_lock_irqsave(&rq->producer_lock, flags);
+
+ while (wr) {
+ err = post_one_recv(rq, wr);
+ if (unlikely(err)) {
+ *bad_wr = wr;
+ break;
+ }
+ wr = wr->next;
+ }
+
+ spin_unlock_irqrestore(&rq->producer_lock, flags);
+
+err1:
+ return err;
+}
+
+static struct ib_cq *rxe_create_cq(struct ib_device *dev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(dev);
+ struct rxe_cq *cq;
+
+ if (attr->flags)
+ return ERR_PTR(-EINVAL);
+
+ err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
+ if (err)
+ goto err1;
+
+ cq = rxe_alloc(&rxe->cq_pool);
+ if (!cq) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
+ context, udata);
+ if (err)
+ goto err2;
+
+ return &cq->ibcq;
+
+err2:
+ rxe_drop_ref(cq);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_destroy_cq(struct ib_cq *ibcq)
+{
+ struct rxe_cq *cq = to_rcq(ibcq);
+
+ rxe_drop_ref(cq);
+ return 0;
+}
+
+static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
+{
+ int err;
+ struct rxe_cq *cq = to_rcq(ibcq);
+ struct rxe_dev *rxe = to_rdev(ibcq->device);
+
+ err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
+ if (err)
+ goto err1;
+
+ err = rxe_cq_resize_queue(cq, cqe, udata);
+ if (err)
+ goto err1;
+
+ return 0;
+
+err1:
+ return err;
+}
+
+static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+ int i;
+ struct rxe_cq *cq = to_rcq(ibcq);
+ struct rxe_cqe *cqe;
+
+ for (i = 0; i < num_entries; i++) {
+ cqe = queue_head(cq->queue);
+ if (!cqe)
+ break;
+
+ memcpy(wc++, &cqe->ibwc, sizeof(*wc));
+ advance_consumer(cq->queue);
+ }
+
+ return i;
+}
+
+static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
+{
+ struct rxe_cq *cq = to_rcq(ibcq);
+ int count = queue_count(cq->queue);
+
+ return (count > wc_cnt) ? wc_cnt : count;
+}
+
+static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
+{
+ struct rxe_cq *cq = to_rcq(ibcq);
+
+ if (cq->notify != IB_CQ_NEXT_COMP)
+ cq->notify = flags & IB_CQ_SOLICITED_MASK;
+
+ return 0;
+}
+
+static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
+{
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *mr;
+ int err;
+
+ mr = rxe_alloc(&rxe->mr_pool);
+ if (!mr) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(mr);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_dma(rxe, pd, access, mr);
+ if (err)
+ goto err2;
+
+ return &mr->ibmr;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(mr);
+ rxe_drop_ref(mr);
+err1:
+ return ERR_PTR(err);
+}
+
+static struct ib_mr *rxe_reg_phys_mr(struct ib_pd *ibpd,
+ struct ib_phys_buf *phys_buf_array,
+ int num_phys_buf,
+ int access, u64 *iova_start)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *mr;
+ u64 iova = *iova_start;
+
+ mr = rxe_alloc(&rxe->mr_pool);
+ if (!mr) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(mr);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_phys(rxe, pd, access, iova,
+ phys_buf_array, num_phys_buf, mr);
+ if (err)
+ goto err2;
+
+ return &mr->ibmr;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(mr);
+ rxe_drop_ref(mr);
+err1:
+ return ERR_PTR(err);
+}
+
+static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
+ u64 start,
+ u64 length,
+ u64 iova,
+ int access, struct ib_udata *udata)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *mr;
+
+ mr = rxe_alloc(&rxe->mr_pool);
+ if (!mr) {
+ err = -ENOMEM;
+ goto err2;
+ }
+
+ rxe_add_index(mr);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_user(rxe, pd, start, length, iova,
+ access, udata, mr);
+ if (err)
+ goto err3;
+
+ return &mr->ibmr;
+
+err3:
+ rxe_drop_ref(pd);
+ rxe_drop_index(mr);
+ rxe_drop_ref(mr);
+err2:
+ return ERR_PTR(err);
+}
+
+static int rxe_dereg_mr(struct ib_mr *ibmr)
+{
+ struct rxe_mem *mr = to_rmr(ibmr);
+
+ mr->state = RXE_MEM_STATE_ZOMBIE;
+ rxe_drop_ref(mr->pd);
+ rxe_drop_index(mr);
+ rxe_drop_ref(mr);
+ return 0;
+}
+
+static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
+ enum ib_mr_type mr_type,
+ u32 max_num_sg)
+{
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *mr;
+ int err;
+
+ if (mr_type != IB_MR_TYPE_MEM_REG)
+ return ERR_PTR(-EINVAL);
+
+ mr = rxe_alloc(&rxe->mr_pool);
+ if (!mr) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(mr);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
+ if (err)
+ goto err2;
+
+ return &mr->ibmr;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(mr);
+ rxe_drop_ref(mr);
+err1:
+ return ERR_PTR(err);
+}
+
+static struct ib_fast_reg_page_list *
+ rxe_alloc_fast_reg_page_list(struct ib_device *device,
+ int page_list_len)
+{
+ struct rxe_fast_reg_page_list *frpl;
+ int err;
+
+ frpl = kmalloc(sizeof(*frpl), GFP_KERNEL);
+ if (!frpl) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ frpl->ibfrpl.page_list = kmalloc_array(page_list_len, sizeof(u64),
+ GFP_KERNEL);
+ if (!frpl->ibfrpl.page_list) {
+ err = -ENOMEM;
+ goto err2;
+ }
+
+ return &frpl->ibfrpl;
+
+err2:
+ kfree(frpl);
+err1:
+ return ERR_PTR(err);
+}
+
+static void rxe_free_fast_reg_page_list(struct ib_fast_reg_page_list *ibfrpl)
+{
+ struct rxe_fast_reg_page_list *frpl = to_rfrpl(ibfrpl);
+
+ kfree(frpl->ibfrpl.page_list);
+ kfree(frpl);
+}
+
+static struct ib_mw *rxe_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type)
+{
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *mw;
+ int err;
+
+ if (type != IB_MW_TYPE_1)
+ return ERR_PTR(-EINVAL);
+
+ mw = rxe_alloc(&rxe->mw_pool);
+ if (!mw) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(mw);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_mw(rxe, pd, mw);
+ if (err)
+ goto err2;
+
+ return &mw->ibmw;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(mw);
+ rxe_drop_ref(mw);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_bind_mw(struct ib_qp *ibqp,
+ struct ib_mw *ibmw, struct ib_mw_bind *mw_bind)
+{
+ return -EINVAL;
+}
+
+static int rxe_dealloc_mw(struct ib_mw *ibmw)
+{
+ struct rxe_mem *mw = to_rmw(ibmw);
+
+ mw->state = RXE_MEM_STATE_ZOMBIE;
+ rxe_drop_ref(mw->pd);
+ rxe_drop_index(mw);
+ rxe_drop_ref(mw);
+ return 0;
+}
+
+static struct ib_fmr *rxe_alloc_fmr(struct ib_pd *ibpd,
+ int access, struct ib_fmr_attr *attr)
+{
+ struct rxe_dev *rxe = to_rdev(ibpd->device);
+ struct rxe_pd *pd = to_rpd(ibpd);
+ struct rxe_mem *fmr;
+ int err;
+
+ fmr = rxe_alloc(&rxe->fmr_pool);
+ if (!fmr) {
+ err = -ENOMEM;
+ goto err1;
+ }
+
+ rxe_add_index(fmr);
+
+ rxe_add_ref(pd);
+
+ err = rxe_mem_init_fmr(rxe, pd, access, attr, fmr);
+ if (err)
+ goto err2;
+
+ return &fmr->ibfmr;
+
+err2:
+ rxe_drop_ref(pd);
+ rxe_drop_index(fmr);
+ rxe_drop_ref(fmr);
+err1:
+ return ERR_PTR(err);
+}
+
+static int rxe_map_phys_fmr(struct ib_fmr *ibfmr,
+ u64 *page_list, int list_length, u64 iova)
+{
+ struct rxe_mem *fmr = to_rfmr(ibfmr);
+ struct rxe_dev *rxe = to_rdev(ibfmr->device);
+
+ return rxe_mem_map_pages(rxe, fmr, page_list, list_length, iova);
+}
+
+static int rxe_unmap_fmr(struct list_head *fmr_list)
+{
+ struct rxe_mem *fmr;
+
+ list_for_each_entry(fmr, fmr_list, ibfmr.list) {
+ if (fmr->state != RXE_MEM_STATE_VALID)
+ continue;
+
+ fmr->va = 0;
+ fmr->iova = 0;
+ fmr->length = 0;
+ fmr->num_buf = 0;
+ fmr->state = RXE_MEM_STATE_FREE;
+ }
+
+ return 0;
+}
+
+static int rxe_dealloc_fmr(struct ib_fmr *ibfmr)
+{
+ struct rxe_mem *fmr = to_rfmr(ibfmr);
+
+ fmr->state = RXE_MEM_STATE_ZOMBIE;
+ rxe_drop_ref(fmr->pd);
+ rxe_drop_index(fmr);
+ rxe_drop_ref(fmr);
+ return 0;
+}
+
+static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
+{
+ int err;
+ struct rxe_dev *rxe = to_rdev(ibqp->device);
+ struct rxe_qp *qp = to_rqp(ibqp);
+ struct rxe_mc_grp *grp;
+
+ /* takes a ref on grp if successful */
+ err = rxe_mcast_get_grp(rxe, mgid, &grp);
+ if (err)
+ return err;
+
+ err = rxe_mcast_add_grp_elem(rxe, qp, grp);
+
+ rxe_drop_ref(grp);
+ return err;
+}
+
+static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
+{
+ struct rxe_dev *rxe = to_rdev(ibqp->device);
+ struct rxe_qp *qp = to_rqp(ibqp);
+
+ return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
+}
+
+static ssize_t rxe_show_parent(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct rxe_dev *rxe = container_of(device, struct rxe_dev,
+ ib_dev.dev);
+ char *name;
+
+ name = rxe->ifc_ops->parent_name(rxe, 1);
+ return snprintf(buf, 16, "%s\n", name);
+}
+
+static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
+
+static struct device_attribute *rxe_dev_attributes[] = {
+ &dev_attr_parent,
+};
+
+int rxe_register_device(struct rxe_dev *rxe)
+{
+ int err;
+ int i;
+ struct ib_device *dev = &rxe->ib_dev;
+
+ strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
+ strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
+
+ dev->owner = THIS_MODULE;
+ dev->node_type = RDMA_NODE_IB_CA;
+ dev->phys_port_cnt = rxe->num_ports;
+ dev->num_comp_vectors = RXE_NUM_COMP_VECTORS;
+ dev->dma_device = rxe->ifc_ops->dma_device(rxe);
+ dev->local_dma_lkey = 0;
+ dev->node_guid = rxe->ifc_ops->node_guid(rxe);
+ dev->dma_ops = &rxe_dma_mapping_ops;
+
+ dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
+ dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
+ | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
+ | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
+ | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
+ | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
+ | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
+ | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
+ | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
+ | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
+ | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
+ | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
+ | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
+ | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
+ | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
+ | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
+ | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
+ | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
+ | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
+ | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
+ | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
+ | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
+ | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
+ ;
+
+ dev->query_device = rxe_query_device;
+ dev->modify_device = rxe_modify_device;
+ dev->query_port = rxe_query_port;
+ dev->modify_port = rxe_modify_port;
+ dev->get_link_layer = rxe_get_link_layer;
+ dev->query_gid = rxe_query_gid;
+ dev->get_netdev = rxe_get_netdev;
+ dev->add_gid = rxe_add_gid;
+ dev->del_gid = rxe_del_gid;
+ dev->query_pkey = rxe_query_pkey;
+ dev->alloc_ucontext = rxe_alloc_ucontext;
+ dev->dealloc_ucontext = rxe_dealloc_ucontext;
+ dev->mmap = rxe_mmap;
+ dev->get_port_immutable = rxe_port_immutable;
+ dev->alloc_pd = rxe_alloc_pd;
+ dev->dealloc_pd = rxe_dealloc_pd;
+ dev->create_ah = rxe_create_ah;
+ dev->modify_ah = rxe_modify_ah;
+ dev->query_ah = rxe_query_ah;
+ dev->destroy_ah = rxe_destroy_ah;
+ dev->create_srq = rxe_create_srq;
+ dev->modify_srq = rxe_modify_srq;
+ dev->query_srq = rxe_query_srq;
+ dev->destroy_srq = rxe_destroy_srq;
+ dev->post_srq_recv = rxe_post_srq_recv;
+ dev->create_qp = rxe_create_qp;
+ dev->modify_qp = rxe_modify_qp;
+ dev->query_qp = rxe_query_qp;
+ dev->destroy_qp = rxe_destroy_qp;
+ dev->post_send = rxe_post_send;
+ dev->post_recv = rxe_post_recv;
+ dev->create_cq = rxe_create_cq;
+ dev->destroy_cq = rxe_destroy_cq;
+ dev->resize_cq = rxe_resize_cq;
+ dev->poll_cq = rxe_poll_cq;
+ dev->peek_cq = rxe_peek_cq;
+ dev->req_notify_cq = rxe_req_notify_cq;
+ dev->get_dma_mr = rxe_get_dma_mr;
+ dev->reg_phys_mr = rxe_reg_phys_mr;
+ dev->reg_user_mr = rxe_reg_user_mr;
+ dev->dereg_mr = rxe_dereg_mr;
+ dev->alloc_mr = rxe_alloc_mr;
+ dev->alloc_fast_reg_page_list = rxe_alloc_fast_reg_page_list;
+ dev->free_fast_reg_page_list = rxe_free_fast_reg_page_list;
+ dev->alloc_mw = rxe_alloc_mw;
+ dev->bind_mw = rxe_bind_mw;
+ dev->dealloc_mw = rxe_dealloc_mw;
+ dev->alloc_fmr = rxe_alloc_fmr;
+ dev->map_phys_fmr = rxe_map_phys_fmr;
+ dev->unmap_fmr = rxe_unmap_fmr;
+ dev->dealloc_fmr = rxe_dealloc_fmr;
+ dev->attach_mcast = rxe_attach_mcast;
+ dev->detach_mcast = rxe_detach_mcast;
+
+ err = ib_register_device(dev, NULL);
+ if (err) {
+ pr_warn("rxe_register_device failed, err = %d\n", err);
+ goto err1;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
+ err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
+ if (err) {
+ pr_warn("device_create_file failed, i = %d, err = %d\n",
+ i, err);
+ goto err2;
+ }
+ }
+
+ return 0;
+
+err2:
+ ib_unregister_device(dev);
+err1:
+ return err;
+}
+
+int rxe_unregister_device(struct rxe_dev *rxe)
+{
+ int i;
+ struct ib_device *dev = &rxe->ib_dev;
+
+ for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
+ device_remove_file(&dev->dev, rxe_dev_attributes[i]);
+
+ ib_unregister_device(dev);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,497 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+
+#ifndef RXE_VERBS_H
+#define RXE_VERBS_H
+
+#include <linux/interrupt.h>
+#include <rdma/ib_rxe.h>
+#include "rxe_pool.h"
+#include "rxe_task.h"
+
+static inline int pkey_match(u16 key1, u16 key2)
+{
+ return (((key1 & 0x7fff) != 0) &&
+ ((key1 & 0x7fff) == (key2 & 0x7fff)) &&
+ ((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0;
+}
+
+/* Return >0 if psn_a > psn_b
+ * 0 if psn_a == psn_b
+ * <0 if psn_a < psn_b
+ */
+static inline int psn_compare(u32 psn_a, u32 psn_b)
+{
+ s32 diff;
+
+ diff = (psn_a - psn_b) << 8;
+ return diff;
+}
+
+struct rxe_ucontext {
+ struct rxe_pool_entry pelem;
+ struct ib_ucontext ibuc;
+};
+
+struct rxe_pd {
+ struct rxe_pool_entry pelem;
+ struct ib_pd ibpd;
+};
+
+struct rxe_ah {
+ struct rxe_pool_entry pelem;
+ struct ib_ah ibah;
+ struct rxe_pd *pd;
+ struct rxe_av av;
+};
+
+struct rxe_cqe {
+ union {
+ struct ib_wc ibwc;
+ struct ib_uverbs_wc uibwc;
+ };
+};
+
+struct rxe_cq {
+ struct rxe_pool_entry pelem;
+ struct ib_cq ibcq;
+ struct rxe_queue *queue;
+ spinlock_t cq_lock;
+ u8 notify;
+ int is_user;
+ struct tasklet_struct comp_task;
+};
+
+enum wqe_state {
+ wqe_state_posted,
+ wqe_state_processing,
+ wqe_state_pending,
+ wqe_state_done,
+ wqe_state_error,
+};
+
+struct rxe_sq {
+ int max_wr;
+ int max_sge;
+ int max_inline;
+ spinlock_t sq_lock;
+ struct rxe_queue *queue;
+};
+
+struct rxe_rq {
+ int max_wr;
+ int max_sge;
+ spinlock_t producer_lock;
+ spinlock_t consumer_lock;
+ struct rxe_queue *queue;
+};
+
+struct rxe_srq {
+ struct rxe_pool_entry pelem;
+ struct ib_srq ibsrq;
+ struct rxe_pd *pd;
+ struct rxe_cq *cq;
+ struct rxe_rq rq;
+ u32 srq_num;
+
+ void (*event_handler)(
+ struct ib_event *, void *);
+ void *context;
+
+ int limit;
+ int error;
+};
+
+enum rxe_qp_state {
+ QP_STATE_RESET,
+ QP_STATE_INIT,
+ QP_STATE_READY,
+ QP_STATE_DRAIN, /* req only */
+ QP_STATE_DRAINED, /* req only */
+ QP_STATE_ERROR
+};
+
+extern char *rxe_qp_state_name[];
+
+struct rxe_req_info {
+ enum rxe_qp_state state;
+ int wqe_index;
+ u32 psn;
+ int opcode;
+ atomic_t rd_atomic;
+ int wait_fence;
+ int need_rd_atomic;
+ int wait_psn;
+ int need_retry;
+ int noack_pkts;
+ struct rxe_task task;
+};
+
+struct rxe_comp_info {
+ u32 psn;
+ int opcode;
+ int timeout;
+ int timeout_retry;
+ u32 retry_cnt;
+ u32 rnr_retry;
+ struct rxe_task task;
+};
+
+enum rdatm_res_state {
+ rdatm_res_state_next,
+ rdatm_res_state_new,
+ rdatm_res_state_replay,
+};
+
+struct resp_res {
+ int type;
+ u32 first_psn;
+ u32 last_psn;
+ u32 cur_psn;
+ enum rdatm_res_state state;
+
+ union {
+ struct {
+ struct sk_buff *skb;
+ } atomic;
+ struct {
+ struct rxe_mem *mr;
+ u64 va_org;
+ u32 rkey;
+ u32 length;
+ u64 va;
+ u32 resid;
+ } read;
+ };
+};
+
+struct rxe_resp_info {
+ enum rxe_qp_state state;
+ u32 msn;
+ u32 psn;
+ int opcode;
+ int drop_msg;
+ int goto_error;
+ int sent_psn_nak;
+ enum ib_wc_status status;
+ u8 aeth_syndrome;
+
+ /* Receive only */
+ struct rxe_recv_wqe *wqe;
+
+ /* RDMA read / atomic only */
+ u64 va;
+ struct rxe_mem *mr;
+ u32 resid;
+ u32 rkey;
+ u64 atomic_orig;
+
+ /* SRQ only */
+ struct {
+ struct rxe_recv_wqe wqe;
+ struct ib_sge sge[RXE_MAX_SGE];
+ } srq_wqe;
+
+ /* Responder resources. It's a circular list where the oldest
+ * resource is dropped first.
+ */
+ struct resp_res *resources;
+ unsigned int res_head;
+ unsigned int res_tail;
+ struct resp_res *res;
+ struct rxe_task task;
+};
+
+struct rxe_qp {
+ struct rxe_pool_entry pelem;
+ struct ib_qp ibqp;
+ struct ib_qp_attr attr;
+ unsigned int valid;
+ unsigned int mtu;
+ int is_user;
+
+ struct rxe_pd *pd;
+ struct rxe_srq *srq;
+ struct rxe_cq *scq;
+ struct rxe_cq *rcq;
+
+ enum ib_sig_type sq_sig_type;
+
+ struct rxe_sq sq;
+ struct rxe_rq rq;
+
+ struct socket *sk;
+
+ struct rxe_av pri_av;
+ struct rxe_av alt_av;
+
+ /* list of mcast groups qp has joined (for cleanup) */
+ struct list_head grp_list;
+ spinlock_t grp_lock;
+
+ struct sk_buff_head req_pkts;
+ struct sk_buff_head resp_pkts;
+ struct sk_buff_head send_pkts;
+
+ struct rxe_req_info req;
+ struct rxe_comp_info comp;
+ struct rxe_resp_info resp;
+
+ atomic_t ssn;
+ atomic_t skb_out;
+ int need_req_skb;
+
+ /* Timer for retranmitting packet when ACKs have been lost. RC
+ * only. The requester sets it when it is not already
+ * started. The responder resets it whenever an ack is
+ * received.
+ */
+ struct timer_list retrans_timer;
+ u64 qp_timeout_jiffies;
+
+ /* Timer for handling RNR NAKS. */
+ struct timer_list rnr_nak_timer;
+
+ spinlock_t state_lock;
+};
+
+enum rxe_mem_state {
+ RXE_MEM_STATE_ZOMBIE,
+ RXE_MEM_STATE_INVALID,
+ RXE_MEM_STATE_FREE,
+ RXE_MEM_STATE_VALID,
+};
+
+enum rxe_mem_type {
+ RXE_MEM_TYPE_NONE,
+ RXE_MEM_TYPE_DMA,
+ RXE_MEM_TYPE_MR,
+ RXE_MEM_TYPE_FMR,
+ RXE_MEM_TYPE_MW,
+};
+
+#define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct ib_phys_buf))
+
+struct rxe_map {
+ struct ib_phys_buf buf[RXE_BUF_PER_MAP];
+};
+
+struct rxe_mem {
+ struct rxe_pool_entry pelem;
+ union {
+ struct ib_mr ibmr;
+ struct ib_fmr ibfmr;
+ struct ib_mw ibmw;
+ };
+
+ struct rxe_pd *pd;
+ struct ib_umem *umem;
+
+ u32 lkey;
+ u32 rkey;
+
+ enum rxe_mem_state state;
+ enum rxe_mem_type type;
+ u64 va;
+ u64 iova;
+ size_t length;
+ u32 offset;
+ int access;
+
+ int page_shift;
+ int page_mask;
+ int map_shift;
+ int map_mask;
+
+ u32 num_buf;
+
+ u32 max_buf;
+ u32 num_map;
+
+ struct rxe_map **map;
+};
+
+struct rxe_fast_reg_page_list {
+ struct ib_fast_reg_page_list ibfrpl;
+};
+
+struct rxe_mc_grp {
+ struct rxe_pool_entry pelem;
+ spinlock_t mcg_lock;
+ struct rxe_dev *rxe;
+ struct list_head qp_list;
+ union ib_gid mgid;
+ int num_qp;
+ u32 qkey;
+ u16 pkey;
+};
+
+struct rxe_mc_elem {
+ struct rxe_pool_entry pelem;
+ struct list_head qp_list;
+ struct list_head grp_list;
+ struct rxe_qp *qp;
+ struct rxe_mc_grp *grp;
+};
+
+struct rxe_port {
+ struct ib_port_attr attr;
+ u16 *pkey_tbl;
+ __be64 port_guid;
+ __be64 subnet_prefix;
+ spinlock_t port_lock;
+ unsigned int mtu_cap;
+ /* special QPs */
+ u32 qp_smi_index;
+ u32 qp_gsi_index;
+};
+
+/* callbacks from ib_rxe to network interface layer */
+struct rxe_ifc_ops {
+ void (*release)(struct rxe_dev *rxe);
+ __be64 (*node_guid)(struct rxe_dev *rxe);
+ __be64 (*port_guid)(struct rxe_dev *rxe, unsigned int port_num);
+ struct device *(*dma_device)(struct rxe_dev *rxe);
+ int (*mcast_add)(struct rxe_dev *rxe, union ib_gid *mgid);
+ int (*mcast_delete)(struct rxe_dev *rxe, union ib_gid *mgid);
+ int (*prepare)(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
+ struct sk_buff *skb, u32 *crc);
+ int (*send)(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
+ struct sk_buff *skb);
+ int (*loopback)(struct sk_buff *skb);
+ struct sk_buff *(*init_packet)(struct rxe_dev *rxe, struct rxe_av *av,
+ int paylen, struct rxe_pkt_info *pkt);
+ char *(*parent_name)(struct rxe_dev *rxe, unsigned int port_num);
+ enum rdma_link_layer (*link_layer)(struct rxe_dev *rxe,
+ unsigned int port_num);
+};
+
+struct rxe_dev {
+ struct ib_device ib_dev;
+ struct ib_device_attr attr;
+ int max_ucontext;
+ int max_inline_data;
+ struct kref ref_cnt;
+ struct mutex usdev_lock;
+
+ struct rxe_ifc_ops *ifc_ops;
+
+ struct net_device *ndev;
+
+ int xmit_errors;
+
+ struct rxe_pool uc_pool;
+ struct rxe_pool pd_pool;
+ struct rxe_pool ah_pool;
+ struct rxe_pool srq_pool;
+ struct rxe_pool qp_pool;
+ struct rxe_pool cq_pool;
+ struct rxe_pool mr_pool;
+ struct rxe_pool mw_pool;
+ struct rxe_pool fmr_pool;
+ struct rxe_pool mc_grp_pool;
+ struct rxe_pool mc_elem_pool;
+
+ spinlock_t pending_lock;
+ struct list_head pending_mmaps;
+
+ spinlock_t mmap_offset_lock;
+ int mmap_offset;
+
+ u8 num_ports;
+ struct rxe_port *port;
+};
+
+static inline struct rxe_dev *to_rdev(struct ib_device *dev)
+{
+ return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL;
+}
+
+static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc)
+{
+ return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL;
+}
+
+static inline struct rxe_pd *to_rpd(struct ib_pd *pd)
+{
+ return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL;
+}
+
+static inline struct rxe_ah *to_rah(struct ib_ah *ah)
+{
+ return ah ? container_of(ah, struct rxe_ah, ibah) : NULL;
+}
+
+static inline struct rxe_srq *to_rsrq(struct ib_srq *srq)
+{
+ return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL;
+}
+
+static inline struct rxe_qp *to_rqp(struct ib_qp *qp)
+{
+ return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL;
+}
+
+static inline struct rxe_cq *to_rcq(struct ib_cq *cq)
+{
+ return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL;
+}
+
+static inline struct rxe_mem *to_rmr(struct ib_mr *mr)
+{
+ return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL;
+}
+
+static inline struct rxe_mem *to_rfmr(struct ib_fmr *fmr)
+{
+ return fmr ? container_of(fmr, struct rxe_mem, ibfmr) : NULL;
+}
+
+static inline struct rxe_mem *to_rmw(struct ib_mw *mw)
+{
+ return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL;
+}
+
+static inline struct rxe_fast_reg_page_list *to_rfrpl(
+ struct ib_fast_reg_page_list *frpl)
+{
+ return frpl ? container_of(frpl,
+ struct rxe_fast_reg_page_list, ibfrpl) : NULL;
+}
+
+int rxe_register_device(struct rxe_dev *rxe);
+int rxe_unregister_device(struct rxe_dev *rxe);
+
+void rxe_mc_cleanup(void *arg);
+
+#endif /* RXE_VERBS_H */