diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/verbs.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/verbs.c | 2143 |
1 files changed, 2143 insertions, 0 deletions
diff --git a/drivers/staging/rdma/hfi1/verbs.c b/drivers/staging/rdma/hfi1/verbs.c new file mode 100644 index 000000000000..53ac21431542 --- /dev/null +++ b/drivers/staging/rdma/hfi1/verbs.c @@ -0,0 +1,2143 @@ +/* + * + * 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 <linux/vmalloc.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 +}; + +static const opcode_handler opcode_handler_tbl[256] = { + /* RC */ + [IB_OPCODE_RC_SEND_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_REQUEST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = &hfi1_rc_rcv, + [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = &hfi1_rc_rcv, + [IB_OPCODE_RC_ACKNOWLEDGE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = &hfi1_rc_rcv, + [IB_OPCODE_RC_COMPARE_SWAP] = &hfi1_rc_rcv, + [IB_OPCODE_RC_FETCH_ADD] = &hfi1_rc_rcv, + /* UC */ + [IB_OPCODE_UC_SEND_FIRST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_MIDDLE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_LAST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_ONLY] = &hfi1_uc_rcv, + [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_FIRST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_LAST] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_ONLY] = &hfi1_uc_rcv, + [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv, + /* UD */ + [IB_OPCODE_UD_SEND_ONLY] = &hfi1_ud_rcv, + [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_ud_rcv, + /* CNP */ + [IB_OPCODE_CNP] = &hfi1_cnp_rcv +}; + +/* + * 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; + WARN_ON_ONCE(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; + WARN_ON_ONCE(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) +{ + struct hfi1_swqe *wqe; + u32 next; + int i; + int j; + int acc; + struct hfi1_lkey_table *rkt; + struct hfi1_pd *pd; + struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); + struct hfi1_pportdata *ppd; + struct hfi1_ibport *ibp; + + /* IB spec says that num_sge == 0 is OK. */ + if (unlikely(wr->num_sge > qp->s_max_sge)) + return -EINVAL; + + ppd = &dd->pport[qp->port_num - 1]; + ibp = &ppd->ibport_data; + + /* + * 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) { + return -EINVAL; + } else if (qp->ibqp.qp_type == IB_QPT_UC) { + if ((unsigned) wr->opcode >= IB_WR_RDMA_READ) + return -EINVAL; + } 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) + return -EINVAL; + /* Check UD destination address PD */ + if (qp->ibqp.pd != wr->wr.ud.ah->pd) + return -EINVAL; + } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD) + return -EINVAL; + 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))) + return -EINVAL; + else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic) + return -EINVAL; + + next = qp->s_head + 1; + if (next >= qp->s_size) + next = 0; + if (next == qp->s_last) + return -ENOMEM; + + 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; + } else { + struct hfi1_ah *ah = to_iah(wr->wr.ud.ah); + + atomic_inc(&ah->refcount); + } + wqe->ssn = qp->s_ssn++; + qp->s_head = next; + + return 0; + +bail_inval_free: + /* release mr holds */ + while (j) { + struct hfi1_sge *sge = &wqe->sg_list[--j]; + + hfi1_put_mr(sge->mr); + } + return -EINVAL; +} + +/** + * 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 call_send; + unsigned long flags; + unsigned nreq = 0; + + spin_lock_irqsave(&qp->s_lock, flags); + + /* Check that state is OK to post send. */ + if (unlikely(!(ib_hfi1_state_ops[qp->state] & HFI1_POST_SEND_OK))) { + spin_unlock_irqrestore(&qp->s_lock, flags); + return -EINVAL; + } + + /* sq empty and not list -> call send */ + call_send = qp->s_head == qp->s_last && !wr->next; + + for (; wr; wr = wr->next) { + err = post_one_send(qp, wr); + if (unlikely(err)) { + *bad_wr = wr; + goto bail; + } + nreq++; + } +bail: + if (nreq && !call_send) + hfi1_schedule_send(qp); + spin_unlock_irqrestore(&qp->s_lock, flags); + if (nreq && call_send) + hfi1_do_send(&qp->s_iowait.iowork); + 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; +} + +/* + * Make sure the QP is ready and able to accept the given opcode. + */ +static inline int qp_ok(int opcode, struct hfi1_packet *packet) +{ + struct hfi1_ibport *ibp; + + if (!(ib_hfi1_state_ops[packet->qp->state] & HFI1_PROCESS_RECV_OK)) + goto dropit; + if (((opcode & OPCODE_QP_MASK) == packet->qp->allowed_ops) || + (opcode == IB_OPCODE_CNP)) + return 1; +dropit: + ibp = &packet->rcd->ppd->ibport_data; + ibp->n_pkt_drops++; + return 0; +} + + +/** + * 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; + u32 tlen = packet->tlen; + struct hfi1_pportdata *ppd = rcd->ppd; + struct hfi1_ibport *ibp = &ppd->ibport_data; + u32 qp_num; + int lnh; + u8 opcode; + u16 lid; + + /* Check for GRH */ + lnh = be16_to_cpu(hdr->lrh[0]) & 3; + if (lnh == HFI1_LRH_BTH) + packet->ohdr = &hdr->u.oth; + else if (lnh == HFI1_LRH_GRH) { + u32 vtf; + + packet->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; + packet->rcv_flags |= HFI1_HAS_GRH; + } else + goto drop; + + trace_input_ibhdr(rcd->dd, hdr); + + opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24); + inc_opstats(tlen, &rcd->opstats->stats[opcode]); + + /* Get the destination QP number. */ + qp_num = be32_to_cpu(packet->ohdr->bth[1]) & HFI1_QPN_MASK; + lid = be16_to_cpu(hdr->lrh[1]); + if (unlikely((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; + list_for_each_entry_rcu(p, &mcast->qp_list, list) { + packet->qp = p->qp; + spin_lock(&packet->qp->r_lock); + if (likely((qp_ok(opcode, packet)))) + opcode_handler_tbl[opcode](packet); + spin_unlock(&packet->qp->r_lock); + } + /* + * Notify hfi1_multicast_detach() if it is waiting for us + * to finish. + */ + if (atomic_dec_return(&mcast->refcount) <= 1) + wake_up(&mcast->wait); + } else { + rcu_read_lock(); + packet->qp = hfi1_lookup_qpn(ibp, qp_num); + if (!packet->qp) { + rcu_read_unlock(); + goto drop; + } + spin_lock(&packet->qp->r_lock); + if (likely((qp_ok(opcode, packet)))) + opcode_handler_tbl[opcode](packet); + spin_unlock(&packet->qp->r_lock); + rcu_read_unlock(); + } + 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; + + write_seqlock_irqsave(&dev->iowait_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); + } + write_sequnlock_irqrestore(&dev->iowait_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; + + tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); + if (!tx) { + spin_lock_irqsave(&qp->s_lock, flags); + write_seqlock(&dev->iowait_lock); + 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; + write_sequnlock(&dev->iowait_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; + + tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); + if (!tx) + /* call slow path to get the lock */ + tx = __get_txreq(dev, qp); + if (tx) + tx->qp = qp; + return tx; +} + +void hfi1_put_txreq(struct verbs_txreq *tx) +{ + struct hfi1_ibdev *dev; + struct hfi1_qp *qp; + unsigned long flags; + unsigned int seq; + + qp = tx->qp; + dev = to_idev(qp->ibqp.device); + + if (tx->mr) { + hfi1_put_mr(tx->mr); + tx->mr = NULL; + } + sdma_txclean(dd_from_dev(dev), &tx->txreq); + + /* Free verbs_txreq and return to slab cache */ + kmem_cache_free(dev->verbs_txreq_cache, tx); + + do { + seq = read_seqbegin(&dev->iowait_lock); + if (!list_empty(&dev->txwait)) { + struct iowait *wait; + + write_seqlock_irqsave(&dev->iowait_lock, flags); + /* 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 */ + write_sequnlock_irqrestore(&dev->iowait_lock, flags); + hfi1_qp_wakeup(qp, HFI1_S_WAIT_TX); + break; + } + } while (read_seqretry(&dev->iowait_lock, seq)); +} + +/* + * 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; + + hdr = &tx->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) { + write_seqlock(&dev->iowait_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); + } + write_sequnlock(&dev->iowait_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; + WARN_ON_ONCE(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) +{ + int ret = 0; + struct hfi1_pio_header *phdr; + u16 hdrbytes = tx->hdr_dwords << 2; + + phdr = &tx->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_kvaddr( + sde->dd, + &tx->txreq, + &tx->phdr, + 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); + if (!sde) + goto bail_no_sde; + } 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_no_sde: + hfi1_put_txreq(tx); +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) { + write_seqlock(&dev->iowait_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); + } + write_sequnlock(&dev->iowait_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 >= 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 (unlikely(!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; + memset(props, 0, sizeof(*props)); + + 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_sge_rd = 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; + + 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 = 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 = cpu_to_be64(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 && sc_to_vlt(dd, sc5) != 0xf) + 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->qp[0]); + 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); +} + +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->qp[0], NULL); + RCU_INIT_POINTER(ibp->qp[1], NULL); +} + +static void verbs_txreq_kmem_cache_ctor(void *obj) +{ + struct verbs_txreq *tx = (struct verbs_txreq *)obj; + + memset(tx, 0, sizeof(*tx)); +} + +/** + * 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; + /* ensure generation is at least 4 bits (keys.c) */ + if (hfi1_lkey_table_size > MAX_LKEY_TABLE_BITS) { + dd_dev_warn(dd, "lkey bits %u too large, reduced to %u\n", + hfi1_lkey_table_size, MAX_LKEY_TABLE_BITS); + hfi1_lkey_table_size = MAX_LKEY_TABLE_BITS; + } + lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table); + dev->lk_table.table = (struct hfi1_mregion __rcu **) + vmalloc(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); + seqlock_init(&dev->iowait_lock); + dev->mmap_offset = PAGE_SIZE; + spin_lock_init(&dev->mmap_offset_lock); + INIT_LIST_HEAD(&dev->txwait); + INIT_LIST_HEAD(&dev->memwait); + + descq_cnt = sdma_get_descq_cnt(); + + /* SLAB_HWCACHE_ALIGN for AHG */ + dev->verbs_txreq_cache = kmem_cache_create("hfi1_vtxreq_cache", + sizeof(struct verbs_txreq), + 0, SLAB_HWCACHE_ALIGN, + verbs_txreq_kmem_cache_ctor); + if (!dev->verbs_txreq_cache) { + ret = -ENOMEM; + goto err_verbs_txreq; + } + + /* + * The system image GUID is supposed to be the same for all + * HFIs 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 = cpu_to_be64(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 = cpu_to_be64(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_mr = hfi1_alloc_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_verbs_txreq: + kmem_cache_destroy(dev->verbs_txreq_cache); + vfree(dev->lk_table.table); +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; + + 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); + kmem_cache_destroy(dev->verbs_txreq_cache); + vfree(dev->lk_table.table); +} + +/* + * 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); + } +} + +void hfi1_cnp_rcv(struct hfi1_packet *packet) +{ + struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data; + + if (packet->qp->ibqp.qp_type == IB_QPT_UC) + hfi1_uc_rcv(packet); + else if (packet->qp->ibqp.qp_type == IB_QPT_UD) + hfi1_ud_rcv(packet); + else + ibp->n_pkt_drops++; +} |