[PATCH v2 46/49] IB/hfi1: add general verbs handling

Mike Marciniszyn
2015-06-15T13:30:07Z

drivers/infiniband/hw/hfi1/verbs.c | 2215 ++++++++++++++++++++++++++++++++++++
drivers/infiniband/hw/hfi1/verbs.h | 1193 +++++++++++++++++++
2 files changed, 3408 insertions(+)
create mode 100644 drivers/infiniband/hw/hfi1/verbs.c
create mode 100644 drivers/infiniband/hw/hfi1/verbs.h

diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
new file mode 100644
index 0000000..680fd41
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -0,0 +1,2215 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_user_verbs.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/utsname.h>
+#include <linux/rculist.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "device.h"
+#include "trace.h"
+#include "qp.h"
+#include "sdma.h"
+
+unsigned int hfi1_lkey_table_size = 16;
+module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
+ S_IRUGO);
+MODULE_PARM_DESC(lkey_table_size,
+ "LKEY table size in bits (2^n, 1 <= n <= 23)");
+
+static unsigned int hfi1_max_pds = 0xFFFF;
+module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
+MODULE_PARM_DESC(max_pds,
+ "Maximum number of protection domains to support");
+
+static unsigned int hfi1_max_ahs = 0xFFFF;
+module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
+
+unsigned int hfi1_max_cqes = 0x2FFFF;
+module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqes,
+ "Maximum number of completion queue entries to support");
+
+unsigned int hfi1_max_cqs = 0x1FFFF;
+module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
+
+unsigned int hfi1_max_qp_wrs = 0x3FFF;
+module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
+
+unsigned int hfi1_max_qps = 16384;
+module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
+
+unsigned int hfi1_max_sges = 0x60;
+module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
+
+unsigned int hfi1_max_mcast_grps = 16384;
+module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_grps,
+ "Maximum number of multicast groups to support");
+
+unsigned int hfi1_max_mcast_qp_attached = 16;
+module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
+ uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_qp_attached,
+ "Maximum number of attached QPs to support");
+
+unsigned int hfi1_max_srqs = 1024;
+module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
+
+unsigned int hfi1_max_srq_sges = 128;
+module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
+
+unsigned int hfi1_max_srq_wrs = 0x1FFFF;
+module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
+
+static void verbs_sdma_complete(
+ struct sdma_txreq *cookie,
+ int status,
+ int drained);
+
+/*
+ * Note that it is OK to post send work requests in the SQE and ERR
+ * states; hfi1_do_send() will process them and generate error
+ * completions as per IB 1.2 C10-96.
+ */
+const int ib_hfi1_state_ops[IB_QPS_ERR + 1] = {
+ [IB_QPS_RESET] = 0,
+ [IB_QPS_INIT] = HFI1_POST_RECV_OK,
+ [IB_QPS_RTR] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK,
+ [IB_QPS_RTS] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_PROCESS_SEND_OK |
+ HFI1_PROCESS_NEXT_SEND_OK,
+ [IB_QPS_SQD] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_PROCESS_SEND_OK,
+ [IB_QPS_SQE] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_FLUSH_SEND,
+ [IB_QPS_ERR] = HFI1_POST_RECV_OK | HFI1_FLUSH_RECV |
+ HFI1_POST_SEND_OK | HFI1_FLUSH_SEND,
+};
+
+struct hfi1_ucontext {
+ struct ib_ucontext ibucontext;
+};
+
+static inline struct hfi1_ucontext *to_iucontext(struct ib_ucontext
+ *ibucontext)
+{
+ return container_of(ibucontext, struct hfi1_ucontext, ibucontext);
+}
+
+/*
+ * Translate ib_wr_opcode into ib_wc_opcode.
+ */
+const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
+ [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
+ [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
+ [IB_WR_SEND] = IB_WC_SEND,
+ [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
+ [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
+ [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
+};
+
+/*
+ * Length of header by opcode, 0 --> not supported
+ */
+const u8 hdr_len_by_opcode[256] = {
+ /* RC */
+ [IB_OPCODE_RC_SEND_FIRST] = 12 + 8,
+ [IB_OPCODE_RC_SEND_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_SEND_LAST] = 12 + 8,
+ [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_SEND_ONLY] = 12 + 8,
+ [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+ [IB_OPCODE_RC_RDMA_READ_REQUEST] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = 12 + 8 + 4,
+ [IB_OPCODE_RC_ACKNOWLEDGE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_COMPARE_SWAP] = 12 + 8 + 28,
+ [IB_OPCODE_RC_FETCH_ADD] = 12 + 8 + 28,
+ /* UC */
+ [IB_OPCODE_UC_SEND_FIRST] = 12 + 8,
+ [IB_OPCODE_UC_SEND_MIDDLE] = 12 + 8,
+ [IB_OPCODE_UC_SEND_LAST] = 12 + 8,
+ [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_SEND_ONLY] = 12 + 8,
+ [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
+ [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST] = 12 + 8,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+ /* UD */
+ [IB_OPCODE_UD_SEND_ONLY] = 12 + 8 + 8,
+ [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 12
+};
+
+/*
+ * System image GUID.
+ */
+__be64 ib_hfi1_sys_image_guid;
+
+/**
+ * hfi1_copy_sge - copy data to SGE memory
+ * @ss: the SGE state
+ * @data: the data to copy
+ * @length: the length of the data
+ */
+void hfi1_copy_sge(
+ struct hfi1_sge_state *ss,
+ void *data, u32 length,
+ int release)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ BUG_ON(len == 0);
+ memcpy(sge->vaddr, data, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (release)
+ hfi1_put_mr(sge->mr);
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ data += len;
+ length -= len;
+ }
+}
+
+/**
+ * hfi1_skip_sge - skip over SGE memory
+ * @ss: the SGE state
+ * @length: the number of bytes to skip
+ */
+void hfi1_skip_sge(struct hfi1_sge_state *ss, u32 length, int release)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ BUG_ON(len == 0);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (release)
+ hfi1_put_mr(sge->mr);
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ length -= len;
+ }
+}
+
+/**
+ * post_one_send - post one RC, UC, or UD send work request
+ * @qp: the QP to post on
+ * @wr: the work request to send
+ */
+static int post_one_send(struct hfi1_qp *qp, struct ib_send_wr *wr,
+ int *scheduled)
+{
+ struct hfi1_swqe *wqe;
+ u32 next;
+ int i;
+ int j;
+ int acc;
+ int ret;
+ unsigned long flags;
+ struct hfi1_lkey_table *rkt;
+ struct hfi1_pd *pd;
+ u8 sc5;
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ ppd = &dd->pport[qp->port_num - 1];
+ ibp = &ppd->ibport_data;
+
+ /* Check that state is OK to post send. */
+ if (unlikely(!(ib_hfi1_state_ops[qp->state] & HFI1_POST_SEND_OK)))
+ goto bail_inval;
+
+ /* IB spec says that num_sge == 0 is OK. */
+ if (wr->num_sge > qp->s_max_sge)
+ goto bail_inval;
+
+ /*
+ * Don't allow RDMA reads or atomic operations on UC or
+ * undefined operations.
+ * Make sure buffer is large enough to hold the result for atomics.
+ */
+ if (wr->opcode == IB_WR_FAST_REG_MR) {
+ if (hfi1_fast_reg_mr(qp, wr))
+ goto bail_inval;
+ } else if (qp->ibqp.qp_type == IB_QPT_UC) {
+ if ((unsigned) wr->opcode >= IB_WR_RDMA_READ)
+ goto bail_inval;
+ } else if (qp->ibqp.qp_type != IB_QPT_RC) {
+ /* Check IB_QPT_SMI, IB_QPT_GSI, IB_QPT_UD opcode */
+ if (wr->opcode != IB_WR_SEND &&
+ wr->opcode != IB_WR_SEND_WITH_IMM)
+ goto bail_inval;
+ /* Check UD destination address PD */
+ if (qp->ibqp.pd != wr->wr.ud.ah->pd)
+ goto bail_inval;
+ } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD)
+ goto bail_inval;
+ else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
+ (wr->num_sge == 0 ||
+ wr->sg_list[0].length < sizeof(u64) ||
+ wr->sg_list[0].addr & (sizeof(u64) - 1)))
+ goto bail_inval;
+ else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic)
+ goto bail_inval;
+
+ next = qp->s_head + 1;
+ if (next >= qp->s_size)
+ next = 0;
+ if (next == qp->s_last) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ rkt = &to_idev(qp->ibqp.device)->lk_table;
+ pd = to_ipd(qp->ibqp.pd);
+ wqe = get_swqe_ptr(qp, qp->s_head);
+ wqe->wr = *wr;
+ wqe->length = 0;
+ j = 0;
+ if (wr->num_sge) {
+ acc = wr->opcode >= IB_WR_RDMA_READ ?
+ IB_ACCESS_LOCAL_WRITE : 0;
+ for (i = 0; i < wr->num_sge; i++) {
+ u32 length = wr->sg_list[i].length;
+ int ok;
+
+ if (length == 0)
+ continue;
+ ok = hfi1_lkey_ok(rkt, pd, &wqe->sg_list[j],
+ &wr->sg_list[i], acc);
+ if (!ok)
+ goto bail_inval_free;
+ wqe->length += length;
+ j++;
+ }
+ wqe->wr.num_sge = j;
+ }
+ if (qp->ibqp.qp_type == IB_QPT_UC ||
+ qp->ibqp.qp_type == IB_QPT_RC) {
+ if (wqe->length > 0x80000000U)
+ goto bail_inval_free;
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ } else {
+ struct hfi1_ah *ah = to_iah(wr->wr.ud.ah);
+ u8 vl;
+
+ sc5 = ibp->sl_to_sc[ah->attr.sl];
+ vl = sc_to_vlt(dd, sc5);
+ if (vl < PER_VL_SEND_CONTEXTS)
+ if (wqe->length > dd->vld[vl].mtu)
+ goto bail_inval_free;
+
+ atomic_inc(&ah->refcount);
+ }
+ wqe->ssn = qp->s_ssn++;
+ qp->s_head = next;
+
+ ret = 0;
+ goto bail;
+
+bail_inval_free:
+ while (j) {
+ struct hfi1_sge *sge = &wqe->sg_list[--j];
+
+ hfi1_put_mr(sge->mr);
+ }
+bail_inval:
+ ret = -EINVAL;
+bail:
+ if (!ret && !wr->next) {
+ struct sdma_engine *sde;
+
+ sde = qp_to_sdma_engine(qp, sc5);
+ if (sde && !sdma_empty(sde)) {
+ hfi1_schedule_send(qp);
+ *scheduled = 1;
+ }
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+/**
+ * post_send - post a send on a QP
+ * @ibqp: the QP to post the send on
+ * @wr: the list of work requests to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ int err = 0;
+ int scheduled = 0;
+
+ for (; wr; wr = wr->next) {
+ err = post_one_send(qp, wr, &scheduled);
+ if (err) {
+ *bad_wr = wr;
+ goto bail;
+ }
+ }
+
+ /* Try to do the send work in the caller's context. */
+ if (!scheduled)
+ hfi1_do_send(&qp->s_iowait.iowork);
+
+bail:
+ return err;
+}
+
+/**
+ * post_receive - post a receive on a QP
+ * @ibqp: the QP to post the receive on
+ * @wr: the WR to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ struct hfi1_rwq *wq = qp->r_rq.wq;
+ unsigned long flags;
+ int ret;
+
+ /* Check that state is OK to post receive. */
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_POST_RECV_OK) || !wq) {
+ *bad_wr = wr;
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ for (; wr; wr = wr->next) {
+ struct hfi1_rwqe *wqe;
+ u32 next;
+ int i;
+
+ if ((unsigned) wr->num_sge > qp->r_rq.max_sge) {
+ *bad_wr = wr;
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ next = wq->head + 1;
+ if (next >= qp->r_rq.size)
+ next = 0;
+ if (next == wq->tail) {
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ *bad_wr = wr;
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ wqe = get_rwqe_ptr(&qp->r_rq, wq->head);
+ wqe->wr_id = wr->wr_id;
+ wqe->num_sge = wr->num_sge;
+ for (i = 0; i < wr->num_sge; i++)
+ wqe->sg_list[i] = wr->sg_list[i];
+ /* Make sure queue entry is written before the head index. */
+ smp_wmb();
+ wq->head = next;
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ }
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * qp_rcv - processing an incoming packet on a QP
+ * @rcd: the context pointer
+ * @hdr: the packet header
+ * @rcv_flags: flags relevant to rcv processing
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP the packet came on
+ *
+ * This is called from hfi1_ib_rcv() to process an incoming packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+static void qp_rcv(struct hfi1_ctxtdata *rcd, struct hfi1_ib_header *hdr,
+ u32 rcv_flags, void *data, u32 tlen, struct hfi1_qp *qp)
+{
+ struct hfi1_ibport *ibp = &rcd->ppd->ibport_data;
+
+ spin_lock(&qp->r_lock);
+
+ /* Check for valid receive state. */
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK)) {
+ ibp->n_pkt_drops++;
+ goto unlock;
+ }
+
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ if (!HFI1_CAP_IS_KSET(ENABLE_SMA))
+ break;
+ /* FALLTHROUGH */
+ case IB_QPT_UD:
+ hfi1_ud_rcv(ibp, hdr, rcv_flags, data, tlen, qp);
+ break;
+
+ case IB_QPT_RC:
+ hfi1_rc_rcv(rcd, hdr, rcv_flags, data, tlen, qp);
+ break;
+
+ case IB_QPT_UC:
+ hfi1_uc_rcv(ibp, hdr, rcv_flags, data, tlen, qp);
+ break;
+
+ default:
+ break;
+ }
+
+unlock:
+ spin_unlock(&qp->r_lock);
+}
+
+/**
+ * hfi1_ib_rcv - process an incoming packet
+ * @packet: data packet information
+ *
+ * This is called to process an incoming packet at interrupt level.
+ *
+ * Tlen is the length of the header + data + CRC in bytes.
+ */
+void hfi1_ib_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ void *data = packet->ebuf;
+ u32 tlen = packet->tlen;
+ struct hfi1_pportdata *ppd = rcd->ppd;
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_qp *qp;
+ u32 qp_num;
+ u32 rcv_flags = 0;
+ int lnh;
+ u8 opcode;
+ u16 lid;
+
+ /* 24 == LRH+BTH+CRC */
+ if (unlikely(tlen < 24))
+ goto drop;
+
+ /* Check for a valid destination LID (see ch. 7.11.1). */
+ lid = be16_to_cpu(hdr->lrh[1]);
+
+ /* Check for GRH */
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH) {
+ u32 vtf;
+
+ ohdr = &hdr->u.l.oth;
+ if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
+ goto drop;
+ vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
+ if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
+ goto drop;
+ } else
+ goto drop;
+
+ trace_input_ibhdr(rcd->dd, hdr);
+
+ opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f;
+ inc_opstats(tlen, &rcd->opstats->stats[opcode]);
+
+ /* Get the destination QP number. */
+ qp_num = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ if ((lid >= HFI1_MULTICAST_LID_BASE) &&
+ (lid != HFI1_PERMISSIVE_LID)) {
+ struct hfi1_mcast *mcast;
+ struct hfi1_mcast_qp *p;
+
+ if (lnh != HFI1_LRH_GRH)
+ goto drop;
+ mcast = hfi1_mcast_find(ibp, &hdr->u.l.grh.dgid);
+ if (mcast == NULL)
+ goto drop;
+ rcv_flags |= HFI1_HAS_GRH;
+ if (rhf_dc_info(packet->rhf))
+ rcv_flags |= HFI1_SC4_BIT;
+ list_for_each_entry_rcu(p, &mcast->qp_list, list)
+ qp_rcv(rcd, hdr, rcv_flags, data, tlen, p->qp);
+ /*
+ * Notify hfi1_multicast_detach() if it is waiting for us
+ * to finish.
+ */
+ if (atomic_dec_return(&mcast->refcount) <= 1)
+ wake_up(&mcast->wait);
+ } else {
+ if (rcd->lookaside_qp) {
+ if (rcd->lookaside_qpn != qp_num) {
+ if (atomic_dec_and_test(
+ &rcd->lookaside_qp->refcount))
+ wake_up(&rcd->lookaside_qp->wait);
+ rcd->lookaside_qp = NULL;
+ }
+ }
+ if (!rcd->lookaside_qp) {
+ qp = hfi1_lookup_qpn(ibp, qp_num);
+ if (!qp)
+ goto drop;
+ rcd->lookaside_qp = qp;
+ rcd->lookaside_qpn = qp_num;
+ } else
+ qp = rcd->lookaside_qp;
+
+ if (lnh == HFI1_LRH_GRH)
+ rcv_flags |= HFI1_HAS_GRH;
+ if (rhf_dc_info(packet->rhf))
+ rcv_flags |= HFI1_SC4_BIT;
+ qp_rcv(rcd, hdr, rcv_flags, data, tlen, qp);
+ }
+ return;
+
+drop:
+ ibp->n_pkt_drops++;
+}
+
+/*
+ * This is called from a timer to check for QPs
+ * which need kernel memory in order to send a packet.
+ */
+static void mem_timer(unsigned long data)
+{
+ struct hfi1_ibdev *dev = (struct hfi1_ibdev *)data;
+ struct list_head *list = &dev->memwait;
+ struct hfi1_qp *qp = NULL;
+ struct iowait *wait;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ if (!list_empty(list)) {
+ wait = list_first_entry(list, struct iowait, list);
+ qp = container_of(wait, struct hfi1_qp, s_iowait);
+ list_del_init(&qp->s_iowait.list);
+ /* refcount held until actual wake up */
+ if (!list_empty(list))
+ mod_timer(&dev->mem_timer, jiffies + 1);
+ }
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+
+ if (qp)
+ hfi1_qp_wakeup(qp, HFI1_S_WAIT_KMEM);
+}
+
+void update_sge(struct hfi1_sge_state *ss, u32 length)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ sge->vaddr += length;
+ sge->length -= length;
+ sge->sge_length -= length;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ return;
+ sge->n = 0;
+ }
+ sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length = sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+}
+
+static noinline struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
+ struct hfi1_qp *qp)
+{
+ struct verbs_txreq *tx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ spin_lock(&dev->pending_lock);
+
+ if (!list_empty(&dev->txreq_free)) {
+ struct list_head *l = dev->txreq_free.next;
+
+ list_del(l);
+ spin_unlock(&dev->pending_lock);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ tx = list_entry(l, struct verbs_txreq, txreq.list);
+ tx->qp = qp;
+ atomic_inc(&qp->refcount);
+ } else {
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK &&
+ list_empty(&qp->s_iowait.list)) {
+ dev->n_txwait++;
+ qp->s_flags |= HFI1_S_WAIT_TX;
+ list_add_tail(&qp->s_iowait.list, &dev->txwait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_TX);
+ atomic_inc(&qp->refcount);
+ }
+ qp->s_flags &= ~HFI1_S_BUSY;
+ spin_unlock(&dev->pending_lock);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ tx = ERR_PTR(-EBUSY);
+ }
+ return tx;
+}
+
+static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
+ struct hfi1_qp *qp)
+{
+ struct verbs_txreq *tx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+ /* assume the list non empty */
+ if (likely(!list_empty(&dev->txreq_free))) {
+ struct list_head *l = dev->txreq_free.next;
+
+ list_del(l);
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ tx = list_entry(l, struct verbs_txreq, txreq.list);
+ tx->qp = qp;
+ atomic_inc(&qp->refcount);
+ } else {
+ /* call slow path to get the extra lock */
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ tx = __get_txreq(dev, qp);
+ }
+ return tx;
+}
+
+void hfi1_put_txreq(struct verbs_txreq *tx)
+{
+ struct hfi1_ibdev *dev;
+ struct hfi1_qp *qp;
+ unsigned long flags;
+
+ qp = tx->qp;
+ dev = to_idev(qp->ibqp.device);
+
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ if (tx->mr) {
+ hfi1_put_mr(tx->mr);
+ tx->mr = NULL;
+ }
+ sdma_txclean(dd_from_dev(dev), &tx->txreq);
+
+ spin_lock_irqsave(&dev->pending_lock, flags);
+
+ /* Put struct back on free list */
+ list_add(&tx->txreq.list, &dev->txreq_free);
+
+ if (!list_empty(&dev->txwait)) {
+ struct iowait *wait;
+
+ /* Wake up first QP wanting a free struct */
+ wait = list_first_entry(&dev->txwait, struct iowait, list);
+ qp = container_of(wait, struct hfi1_qp, s_iowait);
+ list_del_init(&qp->s_iowait.list);
+ /* refcount held until actual wake up */
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+ hfi1_qp_wakeup(qp, HFI1_S_WAIT_TX);
+ } else
+ spin_unlock_irqrestore(&dev->pending_lock, flags);
+}
+
+/*
+ * This is called with progress side lock held.
+ */
+/* New API */
+static void verbs_sdma_complete(
+ struct sdma_txreq *cookie,
+ int status,
+ int drained)
+{
+ struct verbs_txreq *tx =
+ container_of(cookie, struct verbs_txreq, txreq);
+ struct hfi1_qp *qp = tx->qp;
+
+ spin_lock(&qp->s_lock);
+ if (tx->wqe)
+ hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
+ else if (qp->ibqp.qp_type == IB_QPT_RC) {
+ struct hfi1_ib_header *hdr;
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+
+ hdr = &dev->pio_hdrs[tx->hdr_inx].phdr.hdr;
+ hfi1_rc_send_complete(qp, hdr);
+ }
+ if (drained) {
+ /*
+ * This happens when the send engine notes
+ * a QP in the error state and cannot
+ * do the flush work until that QP's
+ * sdma work has finished.
+ */
+ if (qp->s_flags & HFI1_S_WAIT_DMA) {
+ qp->s_flags &= ~HFI1_S_WAIT_DMA;
+ hfi1_schedule_send(qp);
+ }
+ }
+ spin_unlock(&qp->s_lock);
+
+ hfi1_put_txreq(tx);
+}
+
+static int wait_kmem(struct hfi1_ibdev *dev, struct hfi1_qp *qp)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) {
+ spin_lock(&dev->pending_lock);
+ if (list_empty(&qp->s_iowait.list)) {
+ if (list_empty(&dev->memwait))
+ mod_timer(&dev->mem_timer, jiffies + 1);
+ qp->s_flags |= HFI1_S_WAIT_KMEM;
+ list_add_tail(&qp->s_iowait.list, &dev->memwait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_KMEM);
+ atomic_inc(&qp->refcount);
+ }
+ spin_unlock(&dev->pending_lock);
+ qp->s_flags &= ~HFI1_S_BUSY;
+ ret = -EBUSY;
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ return ret;
+}
+
+/*
+ * This routine calls txadds for each sg entry.
+ *
+ * Add failures will revert the sge cursor
+ */
+static int build_verbs_ulp_payload(
+ struct sdma_engine *sde,
+ struct hfi1_sge_state *ss,
+ u32 length,
+ struct verbs_txreq *tx)
+{
+ struct hfi1_sge *sg_list = ss->sg_list;
+ struct hfi1_sge sge = ss->sge;
+ u8 num_sge = ss->num_sge;
+ u32 len;
+ int ret = 0;
+
+ while (length) {
+ len = ss->sge.length;
+ if (len > length)
+ len = length;
+ if (len > ss->sge.sge_length)
+ len = ss->sge.sge_length;
+ BUG_ON(len == 0);
+ ret = sdma_txadd_kvaddr(
+ sde->dd,
+ &tx->txreq,
+ ss->sge.vaddr,
+ len);
+ if (ret)
+ goto bail_txadd;
+ update_sge(ss, len);
+ length -= len;
+ }
+ return ret;
+bail_txadd:
+ /* unwind cursor */
+ ss->sge = sge;
+ ss->num_sge = num_sge;
+ ss->sg_list = sg_list;
+ return ret;
+}
+
+/*
+ * Build the number of DMA descriptors needed to send length bytes of data.
+ *
+ * NOTE: DMA mapping is held in the tx until completed in the ring or
+ * the tx desc is freed without having been submitted to the ring
+ *
+ * This routine insures the following all the helper routine
+ * calls succeed.
+ */
+/* New API */
+static int build_verbs_tx_desc(
+ struct sdma_engine *sde,
+ struct hfi1_sge_state *ss,
+ u32 length,
+ struct verbs_txreq *tx,
+ struct ahg_ib_header *ahdr,
+ u64 pbc)
+{
+ struct hfi1_ibdev *dev = to_idev(tx->qp->ibqp.device);
+ int ret = 0;
+ struct hfi1_pio_header *phdr;
+ u16 hdrbytes = tx->hdr_dwords << 2;
+
+
+ phdr = &dev->pio_hdrs[tx->hdr_inx].phdr;
+ if (!ahdr->ahgcount) {
+ ret = sdma_txinit_ahg(
+ &tx->txreq,
+ ahdr->tx_flags,
+ hdrbytes + length,
+ ahdr->ahgidx,
+ 0,
+ NULL,
+ 0,
+ verbs_sdma_complete);
+ if (ret)
+ goto bail_txadd;
+ phdr->pbc = cpu_to_le64(pbc);
+ memcpy(&phdr->hdr, &ahdr->ibh, hdrbytes - sizeof(phdr->pbc));
+ /* add the header */
+ ret = sdma_txadd_daddr(
+ sde->dd,
+ &tx->txreq,
+ dev->pio_hdrs_phys + tx->hdr_inx *
+ sizeof(struct tx_pio_header),
+ tx->hdr_dwords << 2);
+ if (ret)
+ goto bail_txadd;
+ } else {
+ struct hfi1_other_headers *sohdr = &ahdr->ibh.u.oth;
+ struct hfi1_other_headers *dohdr = &phdr->hdr.u.oth;
+
+ /* needed in rc_send_complete() */
+ phdr->hdr.lrh[0] = ahdr->ibh.lrh[0];
+ if ((be16_to_cpu(phdr->hdr.lrh[0]) & 3) == HFI1_LRH_GRH) {
+ sohdr = &ahdr->ibh.u.l.oth;
+ dohdr = &phdr->hdr.u.l.oth;
+ }
+ /* opcode */
+ dohdr->bth[0] = sohdr->bth[0];
+ /* PSN/ACK */
+ dohdr->bth[2] = sohdr->bth[2];
+ ret = sdma_txinit_ahg(
+ &tx->txreq,
+ ahdr->tx_flags,
+ length,
+ ahdr->ahgidx,
+ ahdr->ahgcount,
+ ahdr->ahgdesc,
+ hdrbytes,
+ verbs_sdma_complete);
+ if (ret)
+ goto bail_txadd;
+ }
+
+ /* add the ulp payload - if any. ss can be NULL for acks */
+ if (ss)
+ ret = build_verbs_ulp_payload(sde, ss, length, tx);
+bail_txadd:
+ return ret;
+}
+
+int hfi1_verbs_send_dma(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct verbs_txreq *tx;
+ struct sdma_txreq *stx;
+ u64 pbc_flags = 0;
+ struct sdma_engine *sde;
+ u8 sc5 = qp->s_sc;
+ int ret;
+
+ if (!list_empty(&qp->s_iowait.tx_head)) {
+ stx = list_first_entry(
+ &qp->s_iowait.tx_head,
+ struct sdma_txreq,
+ list);
+ list_del_init(&stx->list);
+ tx = container_of(stx, struct verbs_txreq, txreq);
+ ret = sdma_send_txreq(tx->sde, &qp->s_iowait, stx);
+ if (unlikely(ret == -ECOMM))
+ goto bail_ecomm;
+ return ret;
+ }
+
+ tx = get_txreq(dev, qp);
+ if (IS_ERR(tx))
+ goto bail_tx;
+
+ if (!qp->s_hdr->sde)
+ tx->sde = sde = qp_to_sdma_engine(qp, sc5);
+ else
+ tx->sde = sde = qp->s_hdr->sde;
+
+ if (likely(pbc == 0)) {
+ u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+ /* No vl15 here */
+ /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
+ pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
+
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+ }
+ tx->wqe = qp->s_wqe;
+ tx->mr = qp->s_rdma_mr;
+ if (qp->s_rdma_mr)
+ qp->s_rdma_mr = NULL;
+ tx->hdr_dwords = hdrwords + 2;
+ ret = build_verbs_tx_desc(sde, ss, len, tx, ahdr, pbc);
+ if (unlikely(ret))
+ goto bail_build;
+ trace_output_ibhdr(dd_from_ibdev(qp->ibqp.device), &ahdr->ibh);
+ ret = sdma_send_txreq(sde, &qp->s_iowait, &tx->txreq);
+ if (unlikely(ret == -ECOMM))
+ goto bail_ecomm;
+ return ret;
+bail_ecomm:
+ /* The current one got "sent" */
+ return 0;
+bail_build:
+ /* kmalloc or mapping fail */
+ hfi1_put_txreq(tx);
+ return wait_kmem(dev, qp);
+bail_tx:
+ return PTR_ERR(tx);
+}
+
+/*
+ * If we are now in the error state, return zero to flush the
+ * send work request.
+ */
+static int no_bufs_available(struct hfi1_qp *qp, struct send_context *sc)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ unsigned long flags;
+ int ret = 0;
+
+ /*
+ * Note that as soon as want_buffer() is called and
+ * possibly before it returns, sc_piobufavail()
+ * could be called. Therefore, put QP on the I/O wait list before
+ * enabling the PIO avail interrupt.
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) {
+ spin_lock(&dev->pending_lock);
+ if (list_empty(&qp->s_iowait.list)) {
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ int was_empty;
+
+ dev->n_piowait++;
+ qp->s_flags |= HFI1_S_WAIT_PIO;
+ was_empty = list_empty(&sc->piowait);
+ list_add_tail(&qp->s_iowait.list, &sc->piowait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_PIO);
+ atomic_inc(&qp->refcount);
+ /* counting: only call wantpiobuf_intr if first user */
+ if (was_empty)
+ hfi1_sc_wantpiobuf_intr(sc, 1);
+ }
+ spin_unlock(&dev->pending_lock);
+ qp->s_flags &= ~HFI1_S_BUSY;
+ ret = -EBUSY;
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+struct send_context *qp_to_send_context(struct hfi1_qp *qp, u8 sc5)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ struct hfi1_pportdata *ppd = dd->pport + (qp->port_num - 1);
+ u8 vl;
+
+ vl = sc_to_vlt(dd, sc5);
+ if (vl >= hfi1_num_vls(ppd->vls_supported) && vl != 15)
+ return NULL;
+ return dd->vld[vl].sc;
+}
+
+int hfi1_verbs_send_pio(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 *hdr = (u32 *)&ahdr->ibh;
+ u64 pbc_flags = 0;
+ u32 sc5;
+ unsigned long flags = 0;
+ struct send_context *sc;
+ struct pio_buf *pbuf;
+ int wc_status = IB_WC_SUCCESS;
+
+ /* vl15 special case taken care of in ud.c */
+ sc5 = qp->s_sc;
+ sc = qp_to_send_context(qp, sc5);
+
+ if (!sc)
+ return -EINVAL;
+ if (likely(pbc == 0)) {
+ u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+ /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
+ pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+ }
+ pbuf = sc_buffer_alloc(sc, plen, NULL, NULL);
+ if (unlikely(pbuf == NULL)) {
+ if (ppd->host_link_state != HLS_UP_ACTIVE) {
+ /*
+ * If we have filled the PIO buffers to capacity and are
+ * not in an active state this request is not going to
+ * go out to so just complete it with an error or else a
+ * ULP or the core may be stuck waiting.
+ */
+ hfi1_cdbg(
+ PIO,
+ "alloc failed. state not active, completing");
+ wc_status = IB_WC_GENERAL_ERR;
+ goto pio_bail;
+ } else {
+ /*
+ * This is a normal occurrence. The PIO buffs are full
+ * up but we are still happily sending, well we could be
+ * so lets continue to queue the request.
+ */
+ hfi1_cdbg(PIO, "alloc failed. state active, queuing");
+ return no_bufs_available(qp, sc);
+ }
+ }
+
+ if (len == 0) {
+ pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
+ } else {
+ if (ss) {
+ seg_pio_copy_start(pbuf, pbc, hdr, hdrwords*4);
+ while (len) {
+ void *addr = ss->sge.vaddr;
+ u32 slen = ss->sge.length;
+
+ if (slen > len)
+ slen = len;
+ update_sge(ss, slen);
+ seg_pio_copy_mid(pbuf, addr, slen);
+ len -= slen;
+ }
+ seg_pio_copy_end(pbuf);
+ }
+ }
+
+ trace_output_ibhdr(dd_from_ibdev(qp->ibqp.device), &ahdr->ibh);
+
+ if (qp->s_rdma_mr) {
+ hfi1_put_mr(qp->s_rdma_mr);
+ qp->s_rdma_mr = NULL;
+ }
+
+pio_bail:
+ if (qp->s_wqe) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(qp, qp->s_wqe, wc_status);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ } else if (qp->ibqp.qp_type == IB_QPT_RC) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_rc_send_complete(qp, &ahdr->ibh);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ return 0;
+}
+/*
+ * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
+ * being an entry from the ingress partition key table), return 0
+ * otherwise. Use the matching criteria for egress partition keys
+ * specified in the OPAv1 spec., section 9.1l.7.
+ */
+static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
+{
+ u16 mkey = pkey & PKEY_LOW_15_MASK;
+ u16 ment = ent & PKEY_LOW_15_MASK;
+
+ if (mkey == ment) {
+ /*
+ * If pkey[15] is set (full partition member),
+ * is bit 15 in the corresponding table element
+ * clear (limited member)?
+ */
+ if (pkey & PKEY_MEMBER_MASK)
+ return !!(ent & PKEY_MEMBER_MASK);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * egress_pkey_check - return 0 if hdr's pkey matches according to the
+ * criteria in the OPAv1 spec., section 9.11.7.
+ */
+static inline int egress_pkey_check(struct hfi1_pportdata *ppd,
+ struct hfi1_ib_header *hdr,
+ struct hfi1_qp *qp)
+{
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_devdata *dd;
+ int i = 0;
+ u16 pkey;
+ u8 lnh, sc5 = qp->s_sc;
+
+ if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
+ return 0;
+
+ /* locate the pkey within the headers */
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+ if (lnh == HFI1_LRH_GRH)
+ ohdr = &hdr->u.l.oth;
+ else
+ ohdr = &hdr->u.oth;
+
+ pkey = (u16)be32_to_cpu(ohdr->bth[0]);
+
+ /* If SC15, pkey[0:14] must be 0x7fff */
+ if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
+ goto bad;
+
+
+ /* Is the pkey = 0x0, or 0x8000? */
+ if ((pkey & PKEY_LOW_15_MASK) == 0)
+ goto bad;
+
+ /* The most likely matching pkey has index qp->s_pkey_index */
+ if (!egress_pkey_matches_entry(pkey, ppd->pkeys[qp->s_pkey_index])) {
+ /* no match - try the entire table */
+ for (; i < MAX_PKEY_VALUES; i++) {
+ if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
+ break;
+ }
+ }
+
+ if (i < MAX_PKEY_VALUES)
+ return 0;
+bad:
+ incr_cntr64(&ppd->port_xmit_constraint_errors);
+ dd = ppd->dd;
+ if (!(dd->err_info_xmit_constraint.status & OPA_EI_STATUS_SMASK)) {
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+
+ dd->err_info_xmit_constraint.status |= OPA_EI_STATUS_SMASK;
+ dd->err_info_xmit_constraint.slid = slid;
+ dd->err_info_xmit_constraint.pkey = pkey;
+ }
+ return 1;
+}
+
+/**
+ * hfi1_verbs_send - send a packet
+ * @qp: the QP to send on
+ * @ahdr: the packet header
+ * @hdrwords: the number of 32-bit words in the header
+ * @ss: the SGE to send
+ * @len: the length of the packet in bytes
+ *
+ * Return zero if packet is sent or queued OK.
+ * Return non-zero and clear qp->s_flags HFI1_S_BUSY otherwise.
+ */
+int hfi1_verbs_send(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ u32 plen;
+ int ret;
+ int pio = 0;
+ unsigned long flags = 0;
+ u32 dwords = (len + 3) >> 2;
+
+ /*
+ * VL15 packets (IB_QPT_SMI) will always use PIO, so we
+ * can defer SDMA restart until link goes ACTIVE without
+ * worrying about just how we got there.
+ */
+ if ((qp->ibqp.qp_type == IB_QPT_SMI) ||
+ !(dd->flags & HFI1_HAS_SEND_DMA))
+ pio = 1;
+
+ ret = egress_pkey_check(dd->pport, &ahdr->ibh, qp);
+ if (unlikely(ret)) {
+ /*
+ * The value we are returning here does not get propagated to
+ * the verbs caller. Thus we need to complete the request with
+ * error otherwise the caller could be sitting waiting on the
+ * completion event. Only do this for PIO. SDMA has its own
+ * mechanism for handling the errors. So for SDMA we can just
+ * return.
+ */
+ if (pio) {
+ hfi1_cdbg(PIO, "%s() Failed. Completing with err",
+ __func__);
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ return -EINVAL;
+ }
+
+ /*
+ * Calculate the send buffer trigger address.
+ * The +2 counts for the pbc control qword
+ */
+ plen = hdrwords + dwords + 2;
+
+ if (pio) {
+ ret = dd->process_pio_send(
+ qp, ahdr, hdrwords, ss, len, plen, dwords, 0);
+ } else {
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(dd, "CONFIG SDMA %s:%d %s()\n",
+ slashstrip(__FILE__), __LINE__, __func__);
+ dd_dev_err(dd, "SDMA hdrwords = %u, len = %u\n", hdrwords, len);
+#endif
+ ret = dd->process_dma_send(
+ qp, ahdr, hdrwords, ss, len, plen, dwords, 0);
+ }
+
+ return ret;
+}
+
+static int query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props,
+ struct ib_udata *uhw)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibdev *dev = to_idev(ibdev);
+
+ if (uhw->inlen || uhw->outlen)
+ return -EINVAL;
+ props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
+ IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
+ IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
+ IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE;
+
+ props->page_size_cap = PAGE_SIZE;
+ props->vendor_id =
+ dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
+ props->vendor_part_id = dd->pcidev->device;
+ props->hw_ver = dd->minrev;
+ props->sys_image_guid = ib_hfi1_sys_image_guid;
+ props->max_mr_size = ~0ULL;
+ props->max_qp = hfi1_max_qps;
+ props->max_qp_wr = hfi1_max_qp_wrs;
+ props->max_sge = hfi1_max_sges;
+ props->max_cq = hfi1_max_cqs;
+ props->max_ah = hfi1_max_ahs;
+ props->max_cqe = hfi1_max_cqes;
+ props->max_mr = dev->lk_table.max;
+ props->max_fmr = dev->lk_table.max;
+ props->max_map_per_fmr = 32767;
+ props->max_pd = hfi1_max_pds;
+ props->max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
+ props->max_qp_init_rd_atom = 255;
+ /* props->max_res_rd_atom */
+ props->max_srq = hfi1_max_srqs;
+ props->max_srq_wr = hfi1_max_srq_wrs;
+ props->max_srq_sge = hfi1_max_srq_sges;
+ /* props->local_ca_ack_delay */
+ props->atomic_cap = IB_ATOMIC_GLOB;
+ props->max_pkeys = hfi1_get_npkeys(dd);
+ props->max_mcast_grp = hfi1_max_mcast_grps;
+ props->max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
+ props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
+ props->max_mcast_grp;
+
+ return 0;
+}
+
+static inline u16 opa_speed_to_ib(u16 in)
+{
+ u16 out = 0;
+
+ if (in & OPA_LINK_SPEED_25G)
+ out |= IB_SPEED_EDR;
+ if (in & OPA_LINK_SPEED_12_5G)
+ out |= IB_SPEED_FDR;
+
+ BUG_ON(!out);
+ return out;
+}
+
+/*
+ * Convert a single OPA link width (no multiple flags) to an IB value.
+ * A zero OPA link width means link down, which means the IB width value
+ * is a don't care.
+ */
+static inline u16 opa_width_to_ib(u16 in)
+{
+ switch (in) {
+ case OPA_LINK_WIDTH_1X:
+ /* map 2x and 3x to 1x as they don't exist in IB */
+ case OPA_LINK_WIDTH_2X:
+ case OPA_LINK_WIDTH_3X:
+ return IB_WIDTH_1X;
+ default: /* link down or unknown, return our largest width */
+ case OPA_LINK_WIDTH_4X:
+ return IB_WIDTH_4X;
+ }
+}
+
+static int query_port(struct ib_device *ibdev, u8 port,
+ struct ib_port_attr *props)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u16 lid = ppd->lid;
+
+ memset(props, 0, sizeof(*props));
+ props->lid = lid ? lid : 0;
+ props->lmc = ppd->lmc;
+ props->sm_lid = ibp->sm_lid;
+ props->sm_sl = ibp->sm_sl;
+ /* OPA logical states match IB logical states */
+ props->state = driver_lstate(ppd);
+ props->phys_state = hfi1_ibphys_portstate(ppd);
+ props->port_cap_flags = ibp->port_cap_flags;
+ props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
+ props->max_msg_sz = 0x80000000;
+ props->pkey_tbl_len = hfi1_get_npkeys(dd);
+ props->bad_pkey_cntr = ibp->pkey_violations;
+ props->qkey_viol_cntr = ibp->qkey_violations;
+ props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
+ /* see rate_show() in ib core/sysfs.c */
+ props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active);
+ props->max_vl_num = hfi1_num_vls(ppd->vls_supported);
+ props->init_type_reply = 0;
+
+ /* Once we are a "first class" citizen and have added the OPA MTUs to
+ * the core we can advertise the larger MTU enum to the ULPs, for now
+ * advertise only 4K.
+ *
+ * Those applications which are either OPA aware or pass the MTU enum
+ * from the Path Records to us will get the new 8k MTU. Those that
+ * attempt to process the MTU enum may fail in various ways.
+ */
+ props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
+ 4096 : hfi1_max_mtu), IB_MTU_4096);
+ props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
+ mtu_to_enum(ppd->ibmtu, IB_MTU_2048);
+ props->subnet_timeout = ibp->subnet_timeout;
+
+ return 0;
+}
+
+static int port_immutable(struct ib_device *ibdev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ struct ib_port_attr attr;
+ int err;
+
+ err = query_port(ibdev, port_num, &attr);
+ if (err)
+ return err;
+
+ memset(immutable, 0, sizeof(*immutable));
+
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+ immutable->core_cap_flags = RDMA_CORE_PORT_INTEL_OPA;
+ immutable->max_mad_size = OPA_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static int modify_device(struct ib_device *device,
+ int device_modify_mask,
+ struct ib_device_modify *device_modify)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(device);
+ unsigned i;
+ int ret;
+
+ if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+ IB_DEVICE_MODIFY_NODE_DESC)) {
+ ret = -EOPNOTSUPP;
+ goto bail;
+ }
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
+ memcpy(device->node_desc, device_modify->node_desc, 64);
+ for (i = 0; i < dd->num_pports; i++) {
+ struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+ hfi1_node_desc_chg(ibp);
+ }
+ }
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
+ ib_hfi1_sys_image_guid =
+ cpu_to_be64(device_modify->sys_image_guid);
+ for (i = 0; i < dd->num_pports; i++) {
+ struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+ hfi1_sys_guid_chg(ibp);
+ }
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+static int modify_port(struct ib_device *ibdev, u8 port,
+ int port_modify_mask, struct ib_port_modify *props)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ int ret = 0;
+
+ ibp->port_cap_flags |= props->set_port_cap_mask;
+ ibp->port_cap_flags &= ~props->clr_port_cap_mask;
+ if (props->set_port_cap_mask || props->clr_port_cap_mask)
+ hfi1_cap_mask_chg(ibp);
+ if (port_modify_mask & IB_PORT_SHUTDOWN) {
+ set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
+ OPA_LINKDOWN_REASON_UNKNOWN);
+ ret = set_link_state(ppd, HLS_DN_DOWNDEF);
+ }
+ if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
+ ibp->qkey_violations = 0;
+ return ret;
+}
+
+static int query_gid(struct ib_device *ibdev, u8 port,
+ int index, union ib_gid *gid)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ int ret = 0;
+
+ if (!port || port > dd->num_pports)
+ ret = -EINVAL;
+ else {
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ gid->global.subnet_prefix = ibp->gid_prefix;
+ if (index == 0)
+ gid->global.interface_id = ppd->guid;
+ else if (index < HFI1_GUIDS_PER_PORT)
+ gid->global.interface_id = ibp->guids[index - 1];
+ else
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static struct ib_pd *alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct hfi1_ibdev *dev = to_idev(ibdev);
+ struct hfi1_pd *pd;
+ struct ib_pd *ret;
+
+ /*
+ * This is actually totally arbitrary. Some correctness tests
+ * assume there's a maximum number of PDs that can be allocated.
+ * We don't actually have this limit, but we fail the test if
+ * we allow allocations of more than we report for this value.
+ */
+
+ pd = kmalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ spin_lock(&dev->n_pds_lock);
+ if (dev->n_pds_allocated == hfi1_max_pds) {
+ spin_unlock(&dev->n_pds_lock);
+ kfree(pd);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dev->n_pds_allocated++;
+ spin_unlock(&dev->n_pds_lock);
+
+ /* ib_alloc_pd() will initialize pd->ibpd. */
+ pd->user = udata != NULL;
+
+ ret = &pd->ibpd;
+
+bail:
+ return ret;
+}
+
+static int dealloc_pd(struct ib_pd *ibpd)
+{
+ struct hfi1_pd *pd = to_ipd(ibpd);
+ struct hfi1_ibdev *dev = to_idev(ibpd->device);
+
+ spin_lock(&dev->n_pds_lock);
+ dev->n_pds_allocated--;
+ spin_unlock(&dev->n_pds_lock);
+
+ kfree(pd);
+
+ return 0;
+}
+
+/*
+ * convert ah port,sl to sc
+ */
+u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, ah->port_num);
+
+ return ibp->sl_to_sc[ah->sl];
+}
+
+int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_devdata *dd;
+ u8 sc5;
+
+ /* A multicast address requires a GRH (see ch. 8.4.1). */
+ if (ah_attr->dlid >= HFI1_MULTICAST_LID_BASE &&
+ ah_attr->dlid != HFI1_PERMISSIVE_LID &&
+ !(ah_attr->ah_flags & IB_AH_GRH))
+ goto bail;
+ if ((ah_attr->ah_flags & IB_AH_GRH) &&
+ ah_attr->grh.sgid_index >= HFI1_GUIDS_PER_PORT)
+ goto bail;
+ if (ah_attr->dlid == 0)
+ goto bail;
+ if (ah_attr->port_num < 1 ||
+ ah_attr->port_num > ibdev->phys_port_cnt)
+ goto bail;
+ if (ah_attr->static_rate != IB_RATE_PORT_CURRENT &&
+ ib_rate_to_mbps(ah_attr->static_rate) < 0)
+ goto bail;
+ if (ah_attr->sl >= OPA_MAX_SLS)
+ goto bail;
+ /* test the mapping for validity */
+ ibp = to_iport(ibdev, ah_attr->port_num);
+ ppd = ppd_from_ibp(ibp);
+ sc5 = ibp->sl_to_sc[ah_attr->sl];
+ dd = dd_from_ppd(ppd);
+ if (sc_to_vlt(dd, sc5) > num_vls)
+ goto bail;
+ return 0;
+bail:
+ return -EINVAL;
+}
+
+/**
+ * create_ah - create an address handle
+ * @pd: the protection domain
+ * @ah_attr: the attributes of the AH
+ *
+ * This may be called from interrupt context.
+ */
+static struct ib_ah *create_ah(struct ib_pd *pd,
+ struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah;
+ struct ib_ah *ret;
+ struct hfi1_ibdev *dev = to_idev(pd->device);
+ unsigned long flags;
+
+ if (hfi1_check_ah(pd->device, ah_attr)) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+
+ ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
+ if (!ah) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ spin_lock_irqsave(&dev->n_ahs_lock, flags);
+ if (dev->n_ahs_allocated == hfi1_max_ahs) {
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+ kfree(ah);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dev->n_ahs_allocated++;
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+ /* ib_create_ah() will initialize ah->ibah. */
+ ah->attr = *ah_attr;
+ atomic_set(&ah->refcount, 0);
+
+ ret = &ah->ibah;
+
+bail:
+ return ret;
+}
+
+struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid)
+{
+ struct ib_ah_attr attr;
+ struct ib_ah *ah = ERR_PTR(-EINVAL);
+ struct hfi1_qp *qp0;
+
+ memset(&attr, 0, sizeof(attr));
+ attr.dlid = dlid;
+ attr.port_num = ppd_from_ibp(ibp)->port;
+ rcu_read_lock();
+ qp0 = rcu_dereference(ibp->qp0);
+ if (qp0)
+ ah = ib_create_ah(qp0->ibqp.pd, &attr);
+ rcu_read_unlock();
+ return ah;
+}
+
+/**
+ * destroy_ah - destroy an address handle
+ * @ibah: the AH to destroy
+ *
+ * This may be called from interrupt context.
+ */
+static int destroy_ah(struct ib_ah *ibah)
+{
+ struct hfi1_ibdev *dev = to_idev(ibah->device);
+ struct hfi1_ah *ah = to_iah(ibah);
+ unsigned long flags;
+
+ if (atomic_read(&ah->refcount) != 0)
+ return -EBUSY;
+
+ spin_lock_irqsave(&dev->n_ahs_lock, flags);
+ dev->n_ahs_allocated--;
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+ kfree(ah);
+
+ return 0;
+}
+
+static int modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah = to_iah(ibah);
+
+ if (hfi1_check_ah(ibah->device, ah_attr))
+ return -EINVAL;
+
+ ah->attr = *ah_attr;
+
+ return 0;
+}
+
+static int query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah = to_iah(ibah);
+
+ *ah_attr = ah->attr;
+
+ return 0;
+}
+
+/**
+ * hfi1_get_npkeys - return the size of the PKEY table for context 0
+ * @dd: the hfi1_ib device
+ */
+unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
+{
+ return ARRAY_SIZE(dd->pport[0].pkeys);
+}
+
+/*
+ * Return the indexed PKEY from the port PKEY table.
+ */
+unsigned hfi1_get_pkey(struct hfi1_ibport *ibp, unsigned index)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ unsigned ret;
+
+ if (index >= ARRAY_SIZE(ppd->pkeys))
+ ret = 0;
+ else
+ ret = ppd->pkeys[index];
+
+ return ret;
+}
+
+static int query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ int ret;
+
+ if (index >= hfi1_get_npkeys(dd)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ *pkey = hfi1_get_pkey(to_iport(ibdev, port), index);
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * alloc_ucontext - allocate a ucontest
+ * @ibdev: the infiniband device
+ * @udata: not used by the driver
+ */
+
+static struct ib_ucontext *alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct hfi1_ucontext *context;
+ struct ib_ucontext *ret;
+
+ context = kmalloc(sizeof(*context), GFP_KERNEL);
+ if (!context) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ ret = &context->ibucontext;
+
+bail:
+ return ret;
+}
+
+static int dealloc_ucontext(struct ib_ucontext *context)
+{
+ kfree(to_iucontext(context));
+ return 0;
+}
+
+static void init_ibport(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+ size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
+ int i;
+
+ for (i = 0; i < sz; i++) {
+ ibp->sl_to_sc[i] = i;
+ ibp->sc_to_sl[i] = i;
+ }
+
+ spin_lock_init(&ibp->lock);
+ /* Set the prefix to the default value (see ch. 4.1.1) */
+ ibp->gid_prefix = IB_DEFAULT_GID_PREFIX;
+ ibp->sm_lid = 0;
+ /* Below should only set bits defined in OPA PortInfo.CapabilityMask */
+ ibp->port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
+ IB_PORT_CAP_MASK_NOTICE_SUP;
+ ibp->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
+ ibp->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
+ ibp->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
+ ibp->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
+ ibp->pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
+
+ RCU_INIT_POINTER(ibp->qp0, NULL);
+ RCU_INIT_POINTER(ibp->qp1, NULL);
+}
+
+/**
+ * hfi1_register_ib_device - register our device with the infiniband core
+ * @dd: the device data structure
+ * Return 0 if successful, errno if unsuccessful.
+ */
+int hfi1_register_ib_device(struct hfi1_devdata *dd)
+{
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ struct ib_device *ibdev = &dev->ibdev;
+ struct hfi1_pportdata *ppd = dd->pport;
+ unsigned i, lk_tab_size;
+ int ret;
+ size_t lcpysz = IB_DEVICE_NAME_MAX;
+ u16 descq_cnt;
+
+ ret = hfi1_qp_init(dev);
+ if (ret)
+ goto err_qp_init;
+
+
+ for (i = 0; i < dd->num_pports; i++)
+ init_ibport(ppd + i);
+
+ /* Only need to initialize non-zero fields. */
+ spin_lock_init(&dev->n_pds_lock);
+ spin_lock_init(&dev->n_ahs_lock);
+ spin_lock_init(&dev->n_cqs_lock);
+ spin_lock_init(&dev->n_qps_lock);
+ spin_lock_init(&dev->n_srqs_lock);
+ spin_lock_init(&dev->n_mcast_grps_lock);
+ init_timer(&dev->mem_timer);
+ dev->mem_timer.function = mem_timer;
+ dev->mem_timer.data = (unsigned long) dev;
+
+ /*
+ * The top hfi1_lkey_table_size bits are used to index the
+ * table. The lower 8 bits can be owned by the user (copied from
+ * the LKEY). The remaining bits act as a generation number or tag.
+ */
+ spin_lock_init(&dev->lk_table.lock);
+ dev->lk_table.max = 1 << hfi1_lkey_table_size;
+ lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table);
+ dev->lk_table.table = (struct hfi1_mregion __rcu **)
+ __get_free_pages(GFP_KERNEL, get_order(lk_tab_size));
+ if (dev->lk_table.table == NULL) {
+ ret = -ENOMEM;
+ goto err_lk;
+ }
+ RCU_INIT_POINTER(dev->dma_mr, NULL);
+ for (i = 0; i < dev->lk_table.max; i++)
+ RCU_INIT_POINTER(dev->lk_table.table[i], NULL);
+ INIT_LIST_HEAD(&dev->pending_mmaps);
+ spin_lock_init(&dev->pending_lock);
+ dev->mmap_offset = PAGE_SIZE;
+ spin_lock_init(&dev->mmap_offset_lock);
+ INIT_LIST_HEAD(&dev->txwait);
+ INIT_LIST_HEAD(&dev->memwait);
+ INIT_LIST_HEAD(&dev->txreq_free);
+
+ descq_cnt = sdma_get_descq_cnt();
+ /*
+ * AHG mode copy requires header be on cache line
+ */
+ dev->pio_hdr_bytes = descq_cnt * sizeof(struct tx_pio_header);
+ if (descq_cnt) {
+ dev->pio_hdrs = dma_zalloc_coherent(&dd->pcidev->dev,
+ dev->pio_hdr_bytes,
+ &dev->pio_hdrs_phys,
+ GFP_KERNEL);
+ if (!dev->pio_hdrs) {
+ ret = -ENOMEM;
+ goto err_hdrs;
+ }
+ }
+
+ for (i = 0; i < descq_cnt; i++) {
+ struct verbs_txreq *tx;
+
+ tx = kzalloc(sizeof(*tx), GFP_KERNEL);
+ if (!tx) {
+ ret = -ENOMEM;
+ goto err_tx;
+ }
+ tx->hdr_inx = i;
+ list_add(&tx->txreq.list, &dev->txreq_free);
+ }
+
+ /*
+ * The system image GUID is supposed to be the same for all
+ * IB HCAs in a single system but since there can be other
+ * device types in the system, we can't be sure this is unique.
+ */
+ if (!ib_hfi1_sys_image_guid)
+ ib_hfi1_sys_image_guid = ppd->guid;
+ lcpysz = strlcpy(ibdev->name, class_name(), lcpysz);
+ strlcpy(ibdev->name + lcpysz, "_%d", IB_DEVICE_NAME_MAX - lcpysz);
+ ibdev->owner = THIS_MODULE;
+ ibdev->node_guid = ppd->guid;
+ ibdev->uverbs_abi_ver = HFI1_UVERBS_ABI_VERSION;
+ ibdev->uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
+ (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
+ (1ull << IB_USER_VERBS_CMD_POST_SEND) |
+ (1ull << IB_USER_VERBS_CMD_POST_RECV) |
+ (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
+ ibdev->node_type = RDMA_NODE_IB_CA;
+ ibdev->phys_port_cnt = dd->num_pports;
+ ibdev->num_comp_vectors = 1;
+ ibdev->dma_device = &dd->pcidev->dev;
+ ibdev->query_device = query_device;
+ ibdev->modify_device = modify_device;
+ ibdev->query_port = query_port;
+ ibdev->modify_port = modify_port;
+ ibdev->query_pkey = query_pkey;
+ ibdev->query_gid = query_gid;
+ ibdev->alloc_ucontext = alloc_ucontext;
+ ibdev->dealloc_ucontext = dealloc_ucontext;
+ ibdev->alloc_pd = alloc_pd;
+ ibdev->dealloc_pd = dealloc_pd;
+ ibdev->create_ah = create_ah;
+ ibdev->destroy_ah = destroy_ah;
+ ibdev->modify_ah = modify_ah;
+ ibdev->query_ah = query_ah;
+ ibdev->create_srq = hfi1_create_srq;
+ ibdev->modify_srq = hfi1_modify_srq;
+ ibdev->query_srq = hfi1_query_srq;
+ ibdev->destroy_srq = hfi1_destroy_srq;
+ ibdev->create_qp = hfi1_create_qp;
+ ibdev->modify_qp = hfi1_modify_qp;
+ ibdev->query_qp = hfi1_query_qp;
+ ibdev->destroy_qp = hfi1_destroy_qp;
+ ibdev->post_send = post_send;
+ ibdev->post_recv = post_receive;
+ ibdev->post_srq_recv = hfi1_post_srq_receive;
+ ibdev->create_cq = hfi1_create_cq;
+ ibdev->destroy_cq = hfi1_destroy_cq;
+ ibdev->resize_cq = hfi1_resize_cq;
+ ibdev->poll_cq = hfi1_poll_cq;
+ ibdev->req_notify_cq = hfi1_req_notify_cq;
+ ibdev->get_dma_mr = hfi1_get_dma_mr;
+ ibdev->reg_phys_mr = hfi1_reg_phys_mr;
+ ibdev->reg_user_mr = hfi1_reg_user_mr;
+ ibdev->dereg_mr = hfi1_dereg_mr;
+ ibdev->alloc_fast_reg_mr = hfi1_alloc_fast_reg_mr;
+ ibdev->alloc_fast_reg_page_list = hfi1_alloc_fast_reg_page_list;
+ ibdev->free_fast_reg_page_list = hfi1_free_fast_reg_page_list;
+ ibdev->alloc_fmr = hfi1_alloc_fmr;
+ ibdev->map_phys_fmr = hfi1_map_phys_fmr;
+ ibdev->unmap_fmr = hfi1_unmap_fmr;
+ ibdev->dealloc_fmr = hfi1_dealloc_fmr;
+ ibdev->attach_mcast = hfi1_multicast_attach;
+ ibdev->detach_mcast = hfi1_multicast_detach;
+ ibdev->process_mad = hfi1_process_mad;
+ ibdev->mmap = hfi1_mmap;
+ ibdev->dma_ops = &hfi1_dma_mapping_ops;
+ ibdev->get_port_immutable = port_immutable;
+
+ strncpy(ibdev->node_desc, init_utsname()->nodename,
+ sizeof(ibdev->node_desc));
+
+ ret = ib_register_device(ibdev, hfi1_create_port_files);
+ if (ret)
+ goto err_reg;
+
+ ret = hfi1_create_agents(dev);
+ if (ret)
+ goto err_agents;
+
+ ret = hfi1_verbs_register_sysfs(dd);
+ if (ret)
+ goto err_class;
+
+ goto bail;
+
+err_class:
+ hfi1_free_agents(dev);
+err_agents:
+ ib_unregister_device(ibdev);
+err_reg:
+err_tx:
+ while (!list_empty(&dev->txreq_free)) {
+ struct list_head *l = dev->txreq_free.next;
+ struct verbs_txreq *tx;
+
+ list_del(l);
+ tx = list_entry(l, struct verbs_txreq, txreq.list);
+ kfree(tx);
+ }
+ if (dev->pio_hdrs)
+ dma_free_coherent(&dd->pcidev->dev,
+ dev->pio_hdr_bytes,
+ dev->pio_hdrs, dev->pio_hdrs_phys);
+err_hdrs:
+ free_pages((unsigned long) dev->lk_table.table, get_order(lk_tab_size));
+err_lk:
+ hfi1_qp_exit(dev);
+err_qp_init:
+ dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
+bail:
+ return ret;
+}
+
+void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
+{
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ struct ib_device *ibdev = &dev->ibdev;
+ unsigned lk_tab_size;
+
+ hfi1_verbs_unregister_sysfs(dd);
+
+ hfi1_free_agents(dev);
+
+ ib_unregister_device(ibdev);
+
+ if (!list_empty(&dev->txwait))
+ dd_dev_err(dd, "txwait list not empty!\n");
+ if (!list_empty(&dev->memwait))
+ dd_dev_err(dd, "memwait list not empty!\n");
+ if (dev->dma_mr)
+ dd_dev_err(dd, "DMA MR not NULL!\n");
+
+ hfi1_qp_exit(dev);
+ del_timer_sync(&dev->mem_timer);
+ while (!list_empty(&dev->txreq_free)) {
+ struct list_head *l = dev->txreq_free.next;
+ struct verbs_txreq *tx;
+
+ list_del(l);
+ tx = list_entry(l, struct verbs_txreq, txreq.list);
+ kfree(tx);
+ }
+ if (dev->pio_hdrs)
+ dma_free_coherent(&dd->pcidev->dev,
+ dev->pio_hdr_bytes,
+ dev->pio_hdrs, dev->pio_hdrs_phys);
+ lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table);
+ free_pages((unsigned long) dev->lk_table.table,
+ get_order(lk_tab_size));
+}
+
+/*
+ * This must be called with s_lock held.
+ */
+void hfi1_schedule_send(struct hfi1_qp *qp)
+{
+ if (hfi1_send_ok(qp)) {
+ struct hfi1_ibport *ibp =
+ to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ iowait_schedule(&qp->s_iowait, ppd->hfi1_wq);
+ }
+}
diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h
new file mode 100644
index 0000000..c557e8e
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -0,0 +1,1193 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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 Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef HFI1_VERBS_H
+#define HFI1_VERBS_H
+
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/kref.h>
+#include <linux/workqueue.h>
+#include <linux/kthread.h>
+#include <linux/completion.h>
+#include <rdma/ib_pack.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_mad.h>
+
+struct hfi1_ctxtdata;
+struct hfi1_pportdata;
+struct hfi1_devdata;
+struct hfi1_packet;
+
+#include "iowait.h"
+
+#define HFI1_MAX_RDMA_ATOMIC 16
+#define HFI1_GUIDS_PER_PORT 5
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define HFI1_UVERBS_ABI_VERSION 2
+
+/*
+ * Define an ib_cq_notify value that is not valid so we know when CQ
+ * notifications are armed.
+ */
+#define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
+
+#define IB_SEQ_NAK (3 << 29)
+
+/* AETH NAK opcode values */
+#define IB_RNR_NAK 0x20
+#define IB_NAK_PSN_ERROR 0x60
+#define IB_NAK_INVALID_REQUEST 0x61
+#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
+#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
+#define IB_NAK_INVALID_RD_REQUEST 0x64
+
+/* Flags for checking QP state (see ib_hfi1_state_ops[]) */
+#define HFI1_POST_SEND_OK 0x01
+#define HFI1_POST_RECV_OK 0x02
+#define HFI1_PROCESS_RECV_OK 0x04
+#define HFI1_PROCESS_SEND_OK 0x08
+#define HFI1_PROCESS_NEXT_SEND_OK 0x10
+#define HFI1_FLUSH_SEND 0x20
+#define HFI1_FLUSH_RECV 0x40
+#define HFI1_PROCESS_OR_FLUSH_SEND \
+ (HFI1_PROCESS_SEND_OK | HFI1_FLUSH_SEND)
+
+/* IB Performance Manager status values */
+#define IB_PMA_SAMPLE_STATUS_DONE 0x00
+#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
+#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
+
+/* Mandatory IB performance counter select values. */
+#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
+#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
+#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
+#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
+#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
+
+#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
+
+#define IB_BTH_REQ_ACK (1 << 31)
+#define IB_BTH_SOLICITED (1 << 23)
+#define IB_BTH_MIG_REQ (1 << 22)
+
+#define IB_GRH_VERSION 6
+#define IB_GRH_VERSION_MASK 0xF
+#define IB_GRH_VERSION_SHIFT 28
+#define IB_GRH_TCLASS_MASK 0xFF
+#define IB_GRH_TCLASS_SHIFT 20
+#define IB_GRH_FLOW_MASK 0xFFFFF
+#define IB_GRH_FLOW_SHIFT 0
+#define IB_GRH_NEXT_HDR 0x1B
+
+#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
+
+/* Values for set/get portinfo VLCap OperationalVLs */
+#define IB_VL_VL0 1
+#define IB_VL_VL0_1 2
+#define IB_VL_VL0_3 3
+#define IB_VL_VL0_7 4
+#define IB_VL_VL0_14 5
+
+/* flags passed by hfi1_ib_rcv() */
+enum {
+ HFI1_HAS_GRH = (1 << 0),
+ HFI1_SC4_BIT = (1 << 1), /* indicates the DC set the SC[4] bit */
+};
+
+static inline int hfi1_num_vls(int vls)
+{
+ switch (vls) {
+ default:
+ case IB_VL_VL0:
+ return 1;
+ case IB_VL_VL0_1:
+ return 2;
+ case IB_VL_VL0_3:
+ return 4;
+ case IB_VL_VL0_7:
+ return 8;
+ case IB_VL_VL0_14:
+ return 15;
+ }
+}
+
+static inline int hfi1_vls_to_ib_enum(u8 num_vls)
+{
+ switch (num_vls) {
+ case 1:
+ return IB_VL_VL0;
+ case 2:
+ return IB_VL_VL0_1;
+ case 4:
+ return IB_VL_VL0_3;
+ case 8:
+ return IB_VL_VL0_7;
+ case 15:
+ return IB_VL_VL0_14;
+ default:
+ return -1;
+ }
+}
+
+struct ib_reth {
+ __be64 vaddr;
+ __be32 rkey;
+ __be32 length;
+} __packed;
+
+struct ib_atomic_eth {
+ __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
+ __be32 rkey;
+ __be64 swap_data;
+ __be64 compare_data;
+} __packed;
+
+union ib_ehdrs {
+ struct {
+ __be32 deth[2];
+ __be32 imm_data;
+ } ud;
+ struct {
+ struct ib_reth reth;
+ __be32 imm_data;
+ } rc;
+ struct {
+ __be32 aeth;
+ __be32 atomic_ack_eth[2];
+ } at;
+ __be32 imm_data;
+ __be32 aeth;
+ struct ib_atomic_eth atomic_eth;
+} __packed;
+
+struct hfi1_other_headers {
+ __be32 bth[3];
+ union ib_ehdrs u;
+} __packed;
+
+/*
+ * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
+ * long (72 w/ imm_data). Only the first 56 bytes of the IB header
+ * will be in the eager header buffer. The remaining 12 or 16 bytes
+ * are in the data buffer.
+ */
+struct hfi1_ib_header {
+ __be16 lrh[4];
+ union {
+ struct {
+ struct ib_grh grh;
+ struct hfi1_other_headers oth;
+ } l;
+ struct hfi1_other_headers oth;
+ } u;
+} __packed;
+
+struct ahg_ib_header {
+ struct sdma_engine *sde;
+ u32 ahgdesc[2];
+ u16 tx_flags;
+ u8 ahgcount;
+ u8 ahgidx;
+ struct hfi1_ib_header ibh;
+};
+
+struct hfi1_pio_header {
+ __le64 pbc;
+ struct hfi1_ib_header hdr;
+} __packed;
+
+/*
+ * used for force cacheline alignment for AHG
+ */
+struct tx_pio_header {
+ struct hfi1_pio_header phdr;
+} ____cacheline_aligned;
+
+/*
+ * There is one struct hfi1_mcast for each multicast GID.
+ * All attached QPs are then stored as a list of
+ * struct hfi1_mcast_qp.
+ */
+struct hfi1_mcast_qp {
+ struct list_head list;
+ struct hfi1_qp *qp;
+};
+
+struct hfi1_mcast {
+ struct rb_node rb_node;
+ union ib_gid mgid;
+ struct list_head qp_list;
+ wait_queue_head_t wait;
+ atomic_t refcount;
+ int n_attached;
+};
+
+/* Protection domain */
+struct hfi1_pd {
+ struct ib_pd ibpd;
+ int user; /* non-zero if created from user space */
+};
+
+/* Address Handle */
+struct hfi1_ah {
+ struct ib_ah ibah;
+ struct ib_ah_attr attr;
+ atomic_t refcount;
+};
+
+/*
+ * This structure is used by hfi1_mmap() to validate an offset
+ * when an mmap() request is made. The vm_area_struct then uses
+ * this as its vm_private_data.
+ */
+struct hfi1_mmap_info {
+ struct list_head pending_mmaps;
+ struct ib_ucontext *context;
+ void *obj;
+ __u64 offset;
+ struct kref ref;
+ unsigned size;
+};
+
+/*
+ * This structure is used to contain the head pointer, tail pointer,
+ * and completion queue entries as a single memory allocation so
+ * it can be mmap'ed into user space.
+ */
+struct hfi1_cq_wc {
+ u32 head; /* index of next entry to fill */
+ u32 tail; /* index of next ib_poll_cq() entry */
+ union {
+ /* these are actually size ibcq.cqe + 1 */
+ struct ib_uverbs_wc uqueue[0];
+ struct ib_wc kqueue[0];
+ };
+};
+
+/*
+ * The completion queue structure.
+ */
+struct hfi1_cq {
+ struct ib_cq ibcq;
+ struct kthread_work comptask;
+ struct hfi1_devdata *dd;
+ spinlock_t lock; /* protect changes in this struct */
+ u8 notify;
+ u8 triggered;
+ struct hfi1_cq_wc *queue;
+ struct hfi1_mmap_info *ip;
+};
+
+/*
+ * A segment is a linear region of low physical memory.
+ * Used by the verbs layer.
+ */
+struct hfi1_seg {
+ void *vaddr;
+ size_t length;
+};
+
+/* The number of hfi1_segs that fit in a page. */
+#define HFI1_SEGSZ (PAGE_SIZE / sizeof(struct hfi1_seg))
+
+struct hfi1_segarray {
+ struct hfi1_seg segs[HFI1_SEGSZ];
+};
+
+struct hfi1_mregion {
+ struct ib_pd *pd; /* shares refcnt of ibmr.pd */
+ u64 user_base; /* User's address for this region */
+ u64 iova; /* IB start address of this region */
+ size_t length;
+ u32 lkey;
+ u32 offset; /* offset (bytes) to start of region */
+ int access_flags;
+ u32 max_segs; /* number of hfi1_segs in all the arrays */
+ u32 mapsz; /* size of the map array */
+ u8 page_shift; /* 0 - non unform/non powerof2 sizes */
+ u8 lkey_published; /* in global table */
+ struct completion comp; /* complete when refcount goes to zero */
+ atomic_t refcount;
+ struct hfi1_segarray *map[0]; /* the segments */
+};
+
+/*
+ * These keep track of the copy progress within a memory region.
+ * Used by the verbs layer.
+ */
+struct hfi1_sge {
+ struct hfi1_mregion *mr;
+ void *vaddr; /* kernel virtual address of segment */
+ u32 sge_length; /* length of the SGE */
+ u32 length; /* remaining length of the segment */
+ u16 m; /* current index: mr->map[m] */
+ u16 n; /* current index: mr->map[m]->segs[n] */
+};
+
+/* Memory region */
+struct hfi1_mr {
+ struct ib_mr ibmr;
+ struct ib_umem *umem;
+ struct hfi1_mregion mr; /* must be last */
+};
+
+/*
+ * Send work request queue entry.
+ * The size of the sg_list is determined when the QP is created and stored
+ * in qp->s_max_sge.
+ */
+struct hfi1_swqe {
+ struct ib_send_wr wr; /* don't use wr.sg_list */
+ u32 psn; /* first packet sequence number */
+ u32 lpsn; /* last packet sequence number */
+ u32 ssn; /* send sequence number */
+ u32 length; /* total length of data in sg_list */
+ struct hfi1_sge sg_list[0];
+};
+
+/*
+ * Receive work request queue entry.
+ * The size of the sg_list is determined when the QP (or SRQ) is created
+ * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
+ */
+struct hfi1_rwqe {
+ u64 wr_id;
+ u8 num_sge;
+ struct ib_sge sg_list[0];
+};
+
+/*
+ * This structure is used to contain the head pointer, tail pointer,
+ * and receive work queue entries as a single memory allocation so
+ * it can be mmap'ed into user space.
+ * Note that the wq array elements are variable size so you can't
+ * just index into the array to get the N'th element;
+ * use get_rwqe_ptr() instead.
+ */
+struct hfi1_rwq {
+ u32 head; /* new work requests posted to the head */
+ u32 tail; /* receives pull requests from here. */
+ struct hfi1_rwqe wq[0];
+};
+
+struct hfi1_rq {
+ struct hfi1_rwq *wq;
+ u32 size; /* size of RWQE array */
+ u8 max_sge;
+ /* protect changes in this struct */
+ spinlock_t lock ____cacheline_aligned_in_smp;
+};
+
+struct hfi1_srq {
+ struct ib_srq ibsrq;
+ struct hfi1_rq rq;
+ struct hfi1_mmap_info *ip;
+ /* send signal when number of RWQEs < limit */
+ u32 limit;
+};
+
+struct hfi1_sge_state {
+ struct hfi1_sge *sg_list; /* next SGE to be used if any */
+ struct hfi1_sge sge; /* progress state for the current SGE */
+ u32 total_len;
+ u8 num_sge;
+};
+
+/*
+ * This structure holds the information that the send tasklet needs
+ * to send a RDMA read response or atomic operation.
+ */
+struct hfi1_ack_entry {
+ u8 opcode;
+ u8 sent;
+ u32 psn;
+ u32 lpsn;
+ union {
+ struct hfi1_sge rdma_sge;
+ u64 atomic_data;
+ };
+};
+
+/*
+ * Variables prefixed with s_ are for the requester (sender).
+ * Variables prefixed with r_ are for the responder (receiver).
+ * Variables prefixed with ack_ are for responder replies.
+ *
+ * Common variables are protected by both r_rq.lock and s_lock in that order
+ * which only happens in modify_qp() or changing the QP 'state'.
+ */
+struct hfi1_qp {
+ struct ib_qp ibqp;
+ /* read mostly fields above and below */
+ struct ib_ah_attr remote_ah_attr;
+ struct ib_ah_attr alt_ah_attr;
+ struct hfi1_qp __rcu *next; /* link list for QPN hash table */
+ struct hfi1_swqe *s_wq; /* send work queue */
+ struct hfi1_mmap_info *ip;
+ struct ahg_ib_header *s_hdr; /* next packet header to send */
+ u8 s_sc; /* SC[0..4] for next packet */
+ unsigned long timeout_jiffies; /* computed from timeout */
+
+ enum ib_mtu path_mtu;
+ int srate_mbps; /* s_srate (below) converted to Mbit/s */
+ u32 remote_qpn;
+ u32 pmtu; /* decoded from path_mtu */
+ u32 qkey; /* QKEY for this QP (for UD or RD) */
+ u32 s_size; /* send work queue size */
+ u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
+ u32 s_ahgpsn; /* set to the psn in the copy of the header */
+
+ u8 state; /* QP state */
+ u8 qp_access_flags;
+ u8 alt_timeout; /* Alternate path timeout for this QP */
+ u8 timeout; /* Timeout for this QP */
+ u8 s_srate;
+ u8 s_mig_state;
+ u8 port_num;
+ u8 s_pkey_index; /* PKEY index to use */
+ u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
+ u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
+ u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
+ u8 s_retry_cnt; /* number of times to retry */
+ u8 s_rnr_retry_cnt;
+ u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
+ u8 s_max_sge; /* size of s_wq->sg_list */
+ u8 s_draining;
+
+ /* start of read/write fields */
+
+ atomic_t refcount ____cacheline_aligned_in_smp;
+ wait_queue_head_t wait;
+
+
+ struct hfi1_ack_entry s_ack_queue[HFI1_MAX_RDMA_ATOMIC + 1]
+ ____cacheline_aligned_in_smp;
+ struct hfi1_sge_state s_rdma_read_sge;
+
+ spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
+ unsigned long r_aflags;
+ u64 r_wr_id; /* ID for current receive WQE */
+ u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
+ u32 r_len; /* total length of r_sge */
+ u32 r_rcv_len; /* receive data len processed */
+ u32 r_psn; /* expected rcv packet sequence number */
+ u32 r_msn; /* message sequence number */
+
+ u8 r_state; /* opcode of last packet received */
+ u8 r_flags;
+ u8 r_head_ack_queue; /* index into s_ack_queue[] */
+
+ struct list_head rspwait; /* link for waiting to respond */
+
+ struct hfi1_sge_state r_sge; /* current receive data */
+ struct hfi1_rq r_rq; /* receive work queue */
+
+ spinlock_t s_lock ____cacheline_aligned_in_smp;
+ unsigned long s_aflags;
+ struct hfi1_sge_state *s_cur_sge;
+ u32 s_flags;
+ struct hfi1_swqe *s_wqe;
+ struct hfi1_sge_state s_sge; /* current send request data */
+ struct hfi1_mregion *s_rdma_mr;
+ struct sdma_engine *s_sde; /* current sde */
+ u32 s_cur_size; /* size of send packet in bytes */
+ u32 s_len; /* total length of s_sge */
+ u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
+ u32 s_next_psn; /* PSN for next request */
+ u32 s_last_psn; /* last response PSN processed */
+ u32 s_sending_psn; /* lowest PSN that is being sent */
+ u32 s_sending_hpsn; /* highest PSN that is being sent */
+ u32 s_psn; /* current packet sequence number */
+ u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
+ u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
+ u32 s_head; /* new entries added here */
+ u32 s_tail; /* next entry to process */
+ u32 s_cur; /* current work queue entry */
+ u32 s_acked; /* last un-ACK'ed entry */
+ u32 s_last; /* last completed entry */
+ u32 s_ssn; /* SSN of tail entry */
+ u32 s_lsn; /* limit sequence number (credit) */
+ u16 s_hdrwords; /* size of s_hdr in 32 bit words */
+ u16 s_rdma_ack_cnt;
+ s8 s_ahgidx;
+ u8 s_state; /* opcode of last packet sent */
+ u8 s_ack_state; /* opcode of packet to ACK */
+ u8 s_nak_state; /* non-zero if NAK is pending */
+ u8 r_nak_state; /* non-zero if NAK is pending */
+ u8 s_retry; /* requester retry counter */
+ u8 s_rnr_retry; /* requester RNR retry counter */
+ u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
+ u8 s_tail_ack_queue; /* index into s_ack_queue[] */
+
+ struct hfi1_sge_state s_ack_rdma_sge;
+ struct timer_list s_timer;
+
+ struct iowait s_iowait;
+
+ struct hfi1_sge r_sg_list[0] /* verified SGEs */
+ ____cacheline_aligned_in_smp;
+};
+
+/*
+ * Atomic bit definitions for r_aflags.
+ */
+#define HFI1_R_WRID_VALID 0
+#define HFI1_R_REWIND_SGE 1
+
+/*
+ * Atomic bit definitions for s_aflags.
+ */
+#define HFI1_S_ECN 0
+
+/*
+ * Bit definitions for r_flags.
+ */
+#define HFI1_R_REUSE_SGE 0x01
+#define HFI1_R_RDMAR_SEQ 0x02
+#define HFI1_R_RSP_NAK 0x04
+#define HFI1_R_RSP_SEND 0x08
+#define HFI1_R_COMM_EST 0x10
+
+/*
+ * Bit definitions for s_flags.
+ *
+ * HFI1_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
+ * HFI1_S_BUSY - send tasklet is processing the QP
+ * HFI1_S_TIMER - the RC retry timer is active
+ * HFI1_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
+ * HFI1_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
+ * before processing the next SWQE
+ * HFI1_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
+ * before processing the next SWQE
+ * HFI1_S_WAIT_RNR - waiting for RNR timeout
+ * HFI1_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
+ * HFI1_S_WAIT_DMA - waiting for send DMA queue to drain before generating
+ * next send completion entry not via send DMA
+ * HFI1_S_WAIT_PIO - waiting for a send buffer to be available
+ * HFI1_S_WAIT_TX - waiting for a struct verbs_txreq to be available
+ * HFI1_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
+ * HFI1_S_WAIT_KMEM - waiting for kernel memory to be available
+ * HFI1_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
+ * HFI1_S_WAIT_ACK - waiting for an ACK packet before sending more requests
+ * HFI1_S_SEND_ONE - send one packet, request ACK, then wait for ACK
+ */
+#define HFI1_S_SIGNAL_REQ_WR 0x0001
+#define HFI1_S_BUSY 0x0002
+#define HFI1_S_TIMER 0x0004
+#define HFI1_S_RESP_PENDING 0x0008
+#define HFI1_S_ACK_PENDING 0x0010
+#define HFI1_S_WAIT_FENCE 0x0020
+#define HFI1_S_WAIT_RDMAR 0x0040
+#define HFI1_S_WAIT_RNR 0x0080
+#define HFI1_S_WAIT_SSN_CREDIT 0x0100
+#define HFI1_S_WAIT_DMA 0x0200
+#define HFI1_S_WAIT_PIO 0x0400
+#define HFI1_S_WAIT_TX 0x0800
+#define HFI1_S_WAIT_DMA_DESC 0x1000
+#define HFI1_S_WAIT_KMEM 0x2000
+#define HFI1_S_WAIT_PSN 0x4000
+#define HFI1_S_WAIT_ACK 0x8000
+#define HFI1_S_SEND_ONE 0x10000
+#define HFI1_S_UNLIMITED_CREDIT 0x20000
+#define HFI1_S_AHG_VALID 0x40000
+#define HFI1_S_AHG_CLEAR 0x80000
+
+/*
+ * Wait flags that would prevent any packet type from being sent.
+ */
+#define HFI1_S_ANY_WAIT_IO (HFI1_S_WAIT_PIO | HFI1_S_WAIT_TX | \
+ HFI1_S_WAIT_DMA_DESC | HFI1_S_WAIT_KMEM)
+
+/*
+ * Wait flags that would prevent send work requests from making progress.
+ */
+#define HFI1_S_ANY_WAIT_SEND (HFI1_S_WAIT_FENCE | HFI1_S_WAIT_RDMAR | \
+ HFI1_S_WAIT_RNR | HFI1_S_WAIT_SSN_CREDIT | HFI1_S_WAIT_DMA | \
+ HFI1_S_WAIT_PSN | HFI1_S_WAIT_ACK)
+
+#define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | HFI1_S_ANY_WAIT_SEND)
+
+#define HFI1_PSN_CREDIT 16
+
+/*
+ * Since struct hfi1_swqe is not a fixed size, we can't simply index into
+ * struct hfi1_qp.s_wq. This function does the array index computation.
+ */
+static inline struct hfi1_swqe *get_swqe_ptr(struct hfi1_qp *qp,
+ unsigned n)
+{
+ return (struct hfi1_swqe *)((char *)qp->s_wq +
+ (sizeof(struct hfi1_swqe) +
+ qp->s_max_sge *
+ sizeof(struct hfi1_sge)) * n);
+}
+
+/*
+ * Since struct hfi1_rwqe is not a fixed size, we can't simply index into
+ * struct hfi1_rwq.wq. This function does the array index computation.
+ */
+static inline struct hfi1_rwqe *get_rwqe_ptr(struct hfi1_rq *rq, unsigned n)
+{
+ return (struct hfi1_rwqe *)
+ ((char *) rq->wq->wq +
+ (sizeof(struct hfi1_rwqe) +
+ rq->max_sge * sizeof(struct ib_sge)) * n);
+}
+
+struct hfi1_lkey_table {
+ spinlock_t lock; /* protect changes in this struct */
+ u32 next; /* next unused index (speeds search) */
+ u32 gen; /* generation count */
+ u32 max; /* size of the table */
+ struct hfi1_mregion __rcu **table;
+};
+
+struct hfi1_opcode_stats {
+ u64 n_packets; /* number of packets */
+ u64 n_bytes; /* total number of bytes */
+};
+
+struct hfi1_opcode_stats_perctx {
+ struct hfi1_opcode_stats stats[128];
+};
+
+static inline void inc_opstats(
+ u32 tlen,
+ struct hfi1_opcode_stats *stats)
+{
+#ifdef CONFIG_DEBUG_FS
+ stats->n_bytes += tlen;
+ stats->n_packets++;
+#endif
+}
+
+struct hfi1_ibport {
+ struct hfi1_qp __rcu *qp0;
+ struct hfi1_qp __rcu *qp1;
+ struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
+ struct hfi1_ah *sm_ah;
+ struct hfi1_ah *smi_ah;
+ struct rb_root mcast_tree;
+ spinlock_t lock; /* protect changes in this struct */
+
+ /* non-zero when timer is set */
+ unsigned long mkey_lease_timeout;
+ unsigned long trap_timeout;
+ __be64 gid_prefix; /* in network order */
+ __be64 mkey;
+ __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */
+ u64 tid; /* TID for traps */
+ u64 n_rc_resends;
+ u64 n_seq_naks;
+ u64 n_rdma_seq;
+ u64 n_rnr_naks;
+ u64 n_other_naks;
+ u64 n_loop_pkts;
+ u64 n_pkt_drops;
+ u64 n_vl15_dropped;
+ u64 n_rc_timeouts;
+ u64 n_dmawait;
+ u64 n_unaligned;
+ u64 n_rc_dupreq;
+ u64 n_rc_seqnak;
+
+ /* Hot-path per CPU counters to avoid cacheline trading to update */
+ u64 z_rc_acks;
+ u64 z_rc_qacks;
+ u64 z_rc_delayed_comp;
+ u64 __percpu *rc_acks;
+ u64 __percpu *rc_qacks;
+ u64 __percpu *rc_delayed_comp;
+
+ u32 port_cap_flags;
+ u32 pma_sample_start;
+ u32 pma_sample_interval;
+ __be16 pma_counter_select[5];
+ u16 pma_tag;
+ u16 pkey_violations;
+ u16 qkey_violations;
+ u16 mkey_violations;
+ u16 mkey_lease_period;
+ u16 sm_lid;
+ u16 repress_traps;
+ u8 sm_sl;
+ u8 mkeyprot;
+ u8 subnet_timeout;
+ u8 vl_high_limit;
+ /* the first 16 entries are sl_to_vl for !OPA */
+ u8 sl_to_sc[32];
+ u8 sc_to_sl[32];
+};
+
+
+struct hfi1_qp_ibdev;
+struct hfi1_ibdev {
+ struct ib_device ibdev;
+ struct list_head pending_mmaps;
+ spinlock_t mmap_offset_lock; /* protect mmap_offset */
+ u32 mmap_offset;
+ struct hfi1_mregion __rcu *dma_mr;
+
+ struct hfi1_qp_ibdev *qp_dev;
+
+ /* QP numbers are shared by all IB ports */
+ struct hfi1_lkey_table lk_table;
+ struct list_head txwait; /* list for wait verbs_txreq */
+ struct list_head memwait; /* list for wait kernel memory */
+ struct list_head txreq_free;
+ struct timer_list mem_timer;
+ struct tx_pio_header *pio_hdrs;
+ size_t pio_hdr_bytes;
+ dma_addr_t pio_hdrs_phys;
+ /* list of QPs waiting for RNR timer */
+ spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */
+
+ u32 n_piowait;
+ u32 n_txwait;
+
+ u32 n_pds_allocated; /* number of PDs allocated for device */
+ spinlock_t n_pds_lock;
+ u32 n_ahs_allocated; /* number of AHs allocated for device */
+ spinlock_t n_ahs_lock;
+ u32 n_cqs_allocated; /* number of CQs allocated for device */
+ spinlock_t n_cqs_lock;
+ u32 n_qps_allocated; /* number of QPs allocated for device */
+ spinlock_t n_qps_lock;
+ u32 n_srqs_allocated; /* number of SRQs allocated for device */
+ spinlock_t n_srqs_lock;
+ u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
+ spinlock_t n_mcast_grps_lock;
+#ifdef CONFIG_DEBUG_FS
+ /* per HFI debugfs */
+ struct dentry *hfi1_ibdev_dbg;
+ /* per HFI symlinks to above */
+ struct dentry *hfi1_ibdev_link;
+#endif
+};
+
+struct hfi1_verbs_counters {
+ u64 symbol_error_counter;
+ u64 link_error_recovery_counter;
+ u64 link_downed_counter;
+ u64 port_rcv_errors;
+ u64 port_rcv_remphys_errors;
+ u64 port_xmit_discards;
+ u64 port_xmit_data;
+ u64 port_rcv_data;
+ u64 port_xmit_packets;
+ u64 port_rcv_packets;
+ u32 local_link_integrity_errors;
+ u32 excessive_buffer_overrun_errors;
+ u32 vl15_dropped;
+};
+
+static inline struct hfi1_mr *to_imr(struct ib_mr *ibmr)
+{
+ return container_of(ibmr, struct hfi1_mr, ibmr);
+}
+
+static inline struct hfi1_pd *to_ipd(struct ib_pd *ibpd)
+{
+ return container_of(ibpd, struct hfi1_pd, ibpd);
+}
+
+static inline struct hfi1_ah *to_iah(struct ib_ah *ibah)
+{
+ return container_of(ibah, struct hfi1_ah, ibah);
+}
+
+static inline struct hfi1_cq *to_icq(struct ib_cq *ibcq)
+{
+ return container_of(ibcq, struct hfi1_cq, ibcq);
+}
+
+static inline struct hfi1_srq *to_isrq(struct ib_srq *ibsrq)
+{
+ return container_of(ibsrq, struct hfi1_srq, ibsrq);
+}
+
+static inline struct hfi1_qp *to_iqp(struct ib_qp *ibqp)
+{
+ return container_of(ibqp, struct hfi1_qp, ibqp);
+}
+
+static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
+{
+ return container_of(ibdev, struct hfi1_ibdev, ibdev);
+}
+
+/*
+ * Send if not busy or waiting for I/O and either
+ * a RC response is pending or we can process send work requests.
+ */
+static inline int hfi1_send_ok(struct hfi1_qp *qp)
+{
+ return !(qp->s_flags & (HFI1_S_BUSY | HFI1_S_ANY_WAIT_IO)) &&
+ (qp->s_hdrwords || (qp->s_flags & HFI1_S_RESP_PENDING) ||
+ !(qp->s_flags & HFI1_S_ANY_WAIT_SEND));
+}
+
+/*
+ * This must be called with s_lock held.
+ */
+void hfi1_schedule_send(struct hfi1_qp *qp);
+void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
+ u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
+void hfi1_cap_mask_chg(struct hfi1_ibport *ibp);
+void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
+void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
+int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
+ const struct ib_wc *in_wc, const struct ib_grh *in_grh,
+ const struct ib_mad_hdr *in_mad, size_t in_mad_size,
+ struct ib_mad_hdr *out_mad, size_t *out_mad_size,
+ u16 *out_mad_pkey_index);
+int hfi1_create_agents(struct hfi1_ibdev *dev);
+void hfi1_free_agents(struct hfi1_ibdev *dev);
+
+/*
+ * The PSN_MASK and PSN_SHIFT allow for
+ * 1) comparing two PSNs
+ * 2) returning the PSN with any upper bits masked
+ * 3) returning the difference between to PSNs
+ *
+ * The number of significant bits in the PSN must
+ * necessarily be at least one bit less than
+ * the container holding the PSN.
+ */
+#ifndef CONFIG_HFI1_VERBS_31BIT_PSN
+#define PSN_MASK 0xFFFFFF
+#define PSN_SHIFT 8
+#else
+#define PSN_MASK 0x7FFFFFFF
+#define PSN_SHIFT 1
+#endif
+#define PSN_MODIFY_MASK 0xFFFFFF
+
+/*
+ * Compare the lower 24 bits of the msn values.
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int cmp_msn(u32 a, u32 b)
+{
+ return (((int) a) - ((int) b)) << 8;
+}
+
+/*
+ * Compare two PSNs
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int cmp_psn(u32 a, u32 b)
+{
+ return (((int) a) - ((int) b)) << PSN_SHIFT;
+}
+
+/*
+ * Return masked PSN
+ */
+static inline u32 mask_psn(u32 a)
+{
+ return a & PSN_MASK;
+}
+
+/*
+ * Return delta between two PSNs
+ */
+static inline u32 delta_psn(u32 a, u32 b)
+{
+ return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
+}
+
+struct hfi1_mcast *hfi1_mcast_find(struct hfi1_ibport *ibp, union ib_gid *mgid);
+
+int hfi1_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int hfi1_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int hfi1_mcast_tree_empty(struct hfi1_ibport *ibp);
+
+struct verbs_txreq;
+void hfi1_put_txreq(struct verbs_txreq *tx);
+
+int hfi1_verbs_send(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len);
+
+void hfi1_copy_sge(struct hfi1_sge_state *ss, void *data, u32 length,
+ int release);
+
+void hfi1_skip_sge(struct hfi1_sge_state *ss, u32 length, int release);
+
+void hfi1_uc_rcv(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
+ u32 rcv_flags, void *data, u32 tlen, struct hfi1_qp *qp);
+
+void hfi1_rc_rcv(struct hfi1_ctxtdata *rcd, struct hfi1_ib_header *hdr,
+ u32 rcv_flags, void *data, u32 tlen, struct hfi1_qp *qp);
+
+void hfi1_rc_hdrerr(
+ struct hfi1_ctxtdata *rcd,
+ struct hfi1_ib_header *hdr,
+ u32 rcv_flags,
+ struct hfi1_qp *qp);
+
+u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
+
+int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
+
+struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
+
+void hfi1_rc_rnr_retry(unsigned long arg);
+
+void hfi1_rc_send_complete(struct hfi1_qp *qp, struct hfi1_ib_header *hdr);
+
+void hfi1_rc_error(struct hfi1_qp *qp, enum ib_wc_status err);
+
+void hfi1_ud_rcv(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
+ u32 rcv_flags, void *data, u32 tlen, struct hfi1_qp *qp);
+
+int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
+
+int hfi1_alloc_lkey(struct hfi1_mregion *mr, int dma_region);
+
+void hfi1_free_lkey(struct hfi1_mregion *mr);
+
+int hfi1_lkey_ok(struct hfi1_lkey_table *rkt, struct hfi1_pd *pd,
+ struct hfi1_sge *isge, struct ib_sge *sge, int acc);
+
+int hfi1_rkey_ok(struct hfi1_qp *qp, struct hfi1_sge *sge,
+ u32 len, u64 vaddr, u32 rkey, int acc);
+
+int hfi1_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr);
+
+struct ib_srq *hfi1_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *srq_init_attr,
+ struct ib_udata *udata);
+
+int hfi1_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask,
+ struct ib_udata *udata);
+
+int hfi1_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
+
+int hfi1_destroy_srq(struct ib_srq *ibsrq);
+
+int hfi1_cq_init(struct hfi1_devdata *dd);
+
+void hfi1_cq_exit(struct hfi1_devdata *dd);
+
+void hfi1_cq_enter(struct hfi1_cq *cq, struct ib_wc *entry, int sig);
+
+int hfi1_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
+
+struct ib_cq *hfi1_create_cq(
+ struct ib_device *ibdev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *context,
+ struct ib_udata *udata);
+
+int hfi1_destroy_cq(struct ib_cq *ibcq);
+
+int hfi1_req_notify_cq(
+ struct ib_cq *ibcq,
+ enum ib_cq_notify_flags notify_flags);
+
+int hfi1_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
+
+struct ib_mr *hfi1_get_dma_mr(struct ib_pd *pd, int acc);
+
+struct ib_mr *hfi1_reg_phys_mr(struct ib_pd *pd,
+ struct ib_phys_buf *buffer_list,
+ int num_phys_buf, int acc, u64 *iova_start);
+
+struct ib_mr *hfi1_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+ u64 virt_addr, int mr_access_flags,
+ struct ib_udata *udata);
+
+int hfi1_dereg_mr(struct ib_mr *ibmr);
+
+struct ib_mr *hfi1_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
+
+struct ib_fast_reg_page_list *hfi1_alloc_fast_reg_page_list(
+ struct ib_device *ibdev, int page_list_len);
+
+void hfi1_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl);
+
+int hfi1_fast_reg_mr(struct hfi1_qp *qp, struct ib_send_wr *wr);
+
+struct ib_fmr *hfi1_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
+ struct ib_fmr_attr *fmr_attr);
+
+int hfi1_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int list_len, u64 iova);
+
+int hfi1_unmap_fmr(struct list_head *fmr_list);
+
+int hfi1_dealloc_fmr(struct ib_fmr *ibfmr);
+
+static inline void hfi1_get_mr(struct hfi1_mregion *mr)
+{
+ atomic_inc(&mr->refcount);
+}
+
+static inline void hfi1_put_mr(struct hfi1_mregion *mr)
+{
+ if (unlikely(atomic_dec_and_test(&mr->refcount)))
+ complete(&mr->comp);
+}
+
+static inline void hfi1_put_ss(struct hfi1_sge_state *ss)
+{
+ while (ss->num_sge) {
+ hfi1_put_mr(ss->sge.mr);
+ if (--ss->num_sge)
+ ss->sge = *ss->sg_list++;
+ }
+}
+
+void hfi1_release_mmap_info(struct kref *ref);
+
+struct hfi1_mmap_info *hfi1_create_mmap_info(struct hfi1_ibdev *dev, u32 size,
+ struct ib_ucontext *context,
+ void *obj);
+
+void hfi1_update_mmap_info(struct hfi1_ibdev *dev, struct hfi1_mmap_info *ip,
+ u32 size, void *obj);
+
+int hfi1_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
+
+int hfi1_get_rwqe(struct hfi1_qp *qp, int wr_id_only);
+
+void hfi1_migrate_qp(struct hfi1_qp *qp);
+
+int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
+ int has_grh, struct hfi1_qp *qp, u32 bth0);
+
+u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
+ struct ib_global_route *grh, u32 hwords, u32 nwords);
+
+void clear_ahg(struct hfi1_qp *qp);
+
+void hfi1_make_ruc_header(struct hfi1_qp *qp, struct hfi1_other_headers *ohdr,
+ u32 bth0, u32 bth2, int middle);
+
+void hfi1_do_send(struct work_struct *work);
+
+void hfi1_send_complete(struct hfi1_qp *qp, struct hfi1_swqe *wqe,
+ enum ib_wc_status status);
+
+void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct hfi1_qp *qp, int is_fecn);
+
+int hfi1_make_rc_req(struct hfi1_qp *qp);
+
+int hfi1_make_uc_req(struct hfi1_qp *qp);
+
+int hfi1_make_ud_req(struct hfi1_qp *qp);
+
+int hfi1_register_ib_device(struct hfi1_devdata *);
+
+void hfi1_unregister_ib_device(struct hfi1_devdata *);
+
+void hfi1_ib_rcv(struct hfi1_packet *packet);
+
+unsigned hfi1_get_npkeys(struct hfi1_devdata *);
+
+unsigned hfi1_get_pkey(struct hfi1_ibport *, unsigned);
+
+int hfi1_verbs_send_dma(struct hfi1_qp *qp, struct ahg_ib_header *hdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+
+int hfi1_verbs_send_pio(struct hfi1_qp *qp, struct ahg_ib_header *hdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+
+struct send_context *qp_to_send_context(struct hfi1_qp *qp, u8 sc5);
+
+extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
+
+extern const u8 hdr_len_by_opcode[];
+
+extern const int ib_hfi1_state_ops[];
+
+extern __be64 ib_hfi1_sys_image_guid; /* in network order */
+
+extern unsigned int hfi1_lkey_table_size;
+
+extern unsigned int hfi1_max_cqes;
+
+extern unsigned int hfi1_max_cqs;
+
+extern unsigned int hfi1_max_qp_wrs;
+
+extern unsigned int hfi1_max_qps;
+
+extern unsigned int hfi1_max_sges;
+
+extern unsigned int hfi1_max_mcast_grps;
+
+extern unsigned int hfi1_max_mcast_qp_attached;
+
+extern unsigned int hfi1_max_srqs;
+
+extern unsigned int hfi1_max_srq_sges;
+
+extern unsigned int hfi1_max_srq_wrs;
+
+extern const u32 ib_hfi1_rnr_table[];
+
+extern struct ib_dma_mapping_ops hfi1_dma_mapping_ops;
+
+#endif /* HFI1_VERBS_H */