/* * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <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 "qib.h" #include "qib_common.h" static unsigned int ib_qib_qp_table_size = 256; module_param_named(qp_table_size, ib_qib_qp_table_size, uint, S_IRUGO); MODULE_PARM_DESC(qp_table_size, "QP table size"); unsigned int ib_qib_lkey_table_size = 16; module_param_named(lkey_table_size, ib_qib_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 ib_qib_max_pds = 0xFFFF; module_param_named(max_pds, ib_qib_max_pds, uint, S_IRUGO); MODULE_PARM_DESC(max_pds, "Maximum number of protection domains to support"); static unsigned int ib_qib_max_ahs = 0xFFFF; module_param_named(max_ahs, ib_qib_max_ahs, uint, S_IRUGO); MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support"); unsigned int ib_qib_max_cqes = 0x2FFFF; module_param_named(max_cqes, ib_qib_max_cqes, uint, S_IRUGO); MODULE_PARM_DESC(max_cqes, "Maximum number of completion queue entries to support"); unsigned int ib_qib_max_cqs = 0x1FFFF; module_param_named(max_cqs, ib_qib_max_cqs, uint, S_IRUGO); MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support"); unsigned int ib_qib_max_qp_wrs = 0x3FFF; module_param_named(max_qp_wrs, ib_qib_max_qp_wrs, uint, S_IRUGO); MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support"); unsigned int ib_qib_max_qps = 16384; module_param_named(max_qps, ib_qib_max_qps, uint, S_IRUGO); MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support"); unsigned int ib_qib_max_sges = 0x60; module_param_named(max_sges, ib_qib_max_sges, uint, S_IRUGO); MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support"); unsigned int ib_qib_max_mcast_grps = 16384; module_param_named(max_mcast_grps, ib_qib_max_mcast_grps, uint, S_IRUGO); MODULE_PARM_DESC(max_mcast_grps, "Maximum number of multicast groups to support"); unsigned int ib_qib_max_mcast_qp_attached = 16; module_param_named(max_mcast_qp_attached, ib_qib_max_mcast_qp_attached, uint, S_IRUGO); MODULE_PARM_DESC(max_mcast_qp_attached, "Maximum number of attached QPs to support"); unsigned int ib_qib_max_srqs = 1024; module_param_named(max_srqs, ib_qib_max_srqs, uint, S_IRUGO); MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support"); unsigned int ib_qib_max_srq_sges = 128; module_param_named(max_srq_sges, ib_qib_max_srq_sges, uint, S_IRUGO); MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support"); unsigned int ib_qib_max_srq_wrs = 0x1FFFF; module_param_named(max_srq_wrs, ib_qib_max_srq_wrs, uint, S_IRUGO); MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support"); static unsigned int ib_qib_disable_sma; module_param_named(disable_sma, ib_qib_disable_sma, uint, S_IWUSR | S_IRUGO); MODULE_PARM_DESC(disable_sma, "Disable the SMA"); /* * Note that it is OK to post send work requests in the SQE and ERR * states; qib_do_send() will process them and generate error * completions as per IB 1.2 C10-96. */ const int ib_qib_state_ops[IB_QPS_ERR + 1] = { [IB_QPS_RESET] = 0, [IB_QPS_INIT] = QIB_POST_RECV_OK, [IB_QPS_RTR] = QIB_POST_RECV_OK | QIB_PROCESS_RECV_OK, [IB_QPS_RTS] = QIB_POST_RECV_OK | QIB_PROCESS_RECV_OK | QIB_POST_SEND_OK | QIB_PROCESS_SEND_OK | QIB_PROCESS_NEXT_SEND_OK, [IB_QPS_SQD] = QIB_POST_RECV_OK | QIB_PROCESS_RECV_OK | QIB_POST_SEND_OK | QIB_PROCESS_SEND_OK, [IB_QPS_SQE] = QIB_POST_RECV_OK | QIB_PROCESS_RECV_OK | QIB_POST_SEND_OK | QIB_FLUSH_SEND, [IB_QPS_ERR] = QIB_POST_RECV_OK | QIB_FLUSH_RECV | QIB_POST_SEND_OK | QIB_FLUSH_SEND, }; struct qib_ucontext { struct ib_ucontext ibucontext; }; static inline struct qib_ucontext *to_iucontext(struct ib_ucontext *ibucontext) { return container_of(ibucontext, struct qib_ucontext, ibucontext); } /* * Translate ib_wr_opcode into ib_wc_opcode. */ const enum ib_wc_opcode ib_qib_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 }; /* * System image GUID. */ __be64 ib_qib_sys_image_guid; /** * qib_copy_sge - copy data to SGE memory * @ss: the SGE state * @data: the data to copy * @length: the length of the data */ void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length, int release) { struct qib_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) qib_put_mr(sge->mr); if (--ss->num_sge) *sge = *ss->sg_list++; } else if (sge->length == 0 && sge->mr->lkey) { if (++sge->n >= QIB_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; } } /** * qib_skip_sge - skip over SGE memory - XXX almost dup of prev func * @ss: the SGE state * @length: the number of bytes to skip */ void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release) { struct qib_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) qib_put_mr(sge->mr); if (--ss->num_sge) *sge = *ss->sg_list++; } else if (sge->length == 0 && sge->mr->lkey) { if (++sge->n >= QIB_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; } } /* * Count the number of DMA descriptors needed to send length bytes of data. * Don't modify the qib_sge_state to get the count. * Return zero if any of the segments is not aligned. */ static u32 qib_count_sge(struct qib_sge_state *ss, u32 length) { struct qib_sge *sg_list = ss->sg_list; struct qib_sge sge = ss->sge; u8 num_sge = ss->num_sge; u32 ndesc = 1; /* count the header */ while (length) { u32 len = sge.length; if (len > length) len = length; if (len > sge.sge_length) len = sge.sge_length; BUG_ON(len == 0); if (((long) sge.vaddr & (sizeof(u32) - 1)) || (len != length && (len & (sizeof(u32) - 1)))) { ndesc = 0; break; } ndesc++; sge.vaddr += len; sge.length -= len; sge.sge_length -= len; if (sge.sge_length == 0) { if (--num_sge) sge = *sg_list++; } else if (sge.length == 0 && sge.mr->lkey) { if (++sge.n >= QIB_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; } return ndesc; } /* * Copy from the SGEs to the data buffer. */ static void qib_copy_from_sge(void *data, struct qib_sge_state *ss, u32 length) { struct qib_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(data, sge->vaddr, len); sge->vaddr += len; sge->length -= len; sge->sge_length -= len; if (sge->sge_length == 0) { if (--ss->num_sge) *sge = *ss->sg_list++; } else if (sge->length == 0 && sge->mr->lkey) { if (++sge->n >= QIB_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; } } /** * qib_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 qib_post_one_send(struct qib_qp *qp, struct ib_send_wr *wr, int *scheduled) { struct qib_swqe *wqe; u32 next; int i; int j; int acc; int ret; unsigned long flags; struct qib_lkey_table *rkt; struct qib_pd *pd; spin_lock_irqsave(&qp->s_lock, flags); /* Check that state is OK to post send. */ if (unlikely(!(ib_qib_state_ops[qp->state] & QIB_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 (qib_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 = qib_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 if (wqe->length > (dd_from_ibdev(qp->ibqp.device)->pport + qp->port_num - 1)->ibmtu) goto bail_inval_free; else atomic_inc(&to_iah(wr->wr.ud.ah)->refcount); wqe->ssn = qp->s_ssn++; qp->s_head = next; ret = 0; goto bail; bail_inval_free: while (j) { struct qib_sge *sge = &wqe->sg_list[--j]; qib_put_mr(sge->mr); } bail_inval: ret = -EINVAL; bail: if (!ret && !wr->next && !qib_sdma_empty( dd_from_ibdev(qp->ibqp.device)->pport + qp->port_num - 1)) { qib_schedule_send(qp); *scheduled = 1; } spin_unlock_irqrestore(&qp->s_lock, flags); return ret; } /** * qib_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 qib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, struct ib_send_wr **bad_wr) { struct qib_qp *qp = to_iqp(ibqp); int err = 0; int scheduled = 0; for (; wr; wr = wr->next) { err = qib_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) qib_do_send(&qp->s_work); bail: return err; } /** * qib_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 qib_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, struct ib_recv_wr **bad_wr) { struct qib_qp *qp = to_iqp(ibqp); struct qib_rwq *wq = qp->r_rq.wq; unsigned long flags; int ret; /* Check that state is OK to post receive. */ if (!(ib_qib_state_ops[qp->state] & QIB_POST_RECV_OK) || !wq) { *bad_wr = wr; ret = -EINVAL; goto bail; } for (; wr; wr = wr->next) { struct qib_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; } /** * qib_qp_rcv - processing an incoming packet on a QP * @rcd: the context pointer * @hdr: the packet header * @has_grh: true if the packet has a GRH * @data: the packet data * @tlen: the packet length * @qp: the QP the packet came on * * This is called from qib_ib_rcv() to process an incoming packet * for the given QP. * Called at interrupt level. */ static void qib_qp_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, int has_grh, void *data, u32 tlen, struct qib_qp *qp) { struct qib_ibport *ibp = &rcd->ppd->ibport_data; spin_lock(&qp->r_lock); /* Check for valid receive state. */ if (!(ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK)) { ibp->n_pkt_drops++; goto unlock; } switch (qp->ibqp.qp_type) { case IB_QPT_SMI: case IB_QPT_GSI: if (ib_qib_disable_sma) break; /* FALLTHROUGH */ case IB_QPT_UD: qib_ud_rcv(ibp, hdr, has_grh, data, tlen, qp); break; case IB_QPT_RC: qib_rc_rcv(rcd, hdr, has_grh, data, tlen, qp); break; case IB_QPT_UC: qib_uc_rcv(ibp, hdr, has_grh, data, tlen, qp); break; default: break; } unlock: spin_unlock(&qp->r_lock); } /** * qib_ib_rcv - process an incoming packet * @rcd: the context pointer * @rhdr: the header of the packet * @data: the packet payload * @tlen: the packet length * * This is called from qib_kreceive() to process an incoming packet at * interrupt level. Tlen is the length of the header + data + CRC in bytes. */ void qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen) { struct qib_pportdata *ppd = rcd->ppd; struct qib_ibport *ibp = &ppd->ibport_data; struct qib_ib_header *hdr = rhdr; struct qib_other_headers *ohdr; struct qib_qp *qp; u32 qp_num; 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]); if (lid < QIB_MULTICAST_LID_BASE) { lid &= ~((1 << ppd->lmc) - 1); if (unlikely(lid != ppd->lid)) goto drop; } /* Check for GRH */ lnh = be16_to_cpu(hdr->lrh[0]) & 3; if (lnh == QIB_LRH_BTH) ohdr = &hdr->u.oth; else if (lnh == QIB_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; opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f; #ifdef CONFIG_DEBUG_FS rcd->opstats->stats[opcode].n_bytes += tlen; rcd->opstats->stats[opcode].n_packets++; #endif /* Get the destination QP number. */ qp_num = be32_to_cpu(ohdr->bth[1]) & QIB_QPN_MASK; if (qp_num == QIB_MULTICAST_QPN) { struct qib_mcast *mcast; struct qib_mcast_qp *p; if (lnh != QIB_LRH_GRH) goto drop; mcast = qib_mcast_find(ibp, &hdr->u.l.grh.dgid); if (mcast == NULL) goto drop; this_cpu_inc(ibp->pmastats->n_multicast_rcv); list_for_each_entry_rcu(p, &mcast->qp_list, list) qib_qp_rcv(rcd, hdr, 1, data, tlen, p->qp); /* * Notify qib_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 = qib_lookup_qpn(ibp, qp_num); if (!qp) goto drop; rcd->lookaside_qp = qp; rcd->lookaside_qpn = qp_num; } else qp = rcd->lookaside_qp; this_cpu_inc(ibp->pmastats->n_unicast_rcv); qib_qp_rcv(rcd, hdr, lnh == QIB_LRH_GRH, 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 qib_ibdev *dev = (struct qib_ibdev *) data; struct list_head *list = &dev->memwait; struct qib_qp *qp = NULL; unsigned long flags; spin_lock_irqsave(&dev->pending_lock, flags); if (!list_empty(list)) { qp = list_entry(list->next, struct qib_qp, iowait); list_del_init(&qp->iowait); atomic_inc(&qp->refcount); if (!list_empty(list)) mod_timer(&dev->mem_timer, jiffies + 1); } spin_unlock_irqrestore(&dev->pending_lock, flags); if (qp) { spin_lock_irqsave(&qp->s_lock, flags); if (qp->s_flags & QIB_S_WAIT_KMEM) { qp->s_flags &= ~QIB_S_WAIT_KMEM; qib_schedule_send(qp); } spin_unlock_irqrestore(&qp->s_lock, flags); if (atomic_dec_and_test(&qp->refcount)) wake_up(&qp->wait); } } static void update_sge(struct qib_sge_state *ss, u32 length) { struct qib_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 >= QIB_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; } } #ifdef __LITTLE_ENDIAN static inline u32 get_upper_bits(u32 data, u32 shift) { return data >> shift; } static inline u32 set_upper_bits(u32 data, u32 shift) { return data << shift; } static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) { data <<= ((sizeof(u32) - n) * BITS_PER_BYTE); data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE); return data; } #else static inline u32 get_upper_bits(u32 data, u32 shift) { return data << shift; } static inline u32 set_upper_bits(u32 data, u32 shift) { return data >> shift; } static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) { data >>= ((sizeof(u32) - n) * BITS_PER_BYTE); data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE); return data; } #endif static void copy_io(u32 __iomem *piobuf, struct qib_sge_state *ss, u32 length, unsigned flush_wc) { u32 extra = 0; u32 data = 0; u32 last; while (1) { u32 len = ss->sge.length; u32 off; if (len > length) len = length; if (len > ss->sge.sge_length) len = ss->sge.sge_length; BUG_ON(len == 0); /* If the source address is not aligned, try to align it. */ off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1); if (off) { u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr & ~(sizeof(u32) - 1)); u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE); u32 y; y = sizeof(u32) - off; if (len > y) len = y; if (len + extra >= sizeof(u32)) { data |= set_upper_bits(v, extra * BITS_PER_BYTE); len = sizeof(u32) - extra; if (len == length) { last = data; break; } __raw_writel(data, piobuf); piobuf++; extra = 0; data = 0; } else { /* Clear unused upper bytes */ data |= clear_upper_bytes(v, len, extra); if (len == length) { last = data; break; } extra += len; } } else if (extra) { /* Source address is aligned. */ u32 *addr = (u32 *) ss->sge.vaddr; int shift = extra * BITS_PER_BYTE; int ushift = 32 - shift; u32 l = len; while (l >= sizeof(u32)) { u32 v = *addr; data |= set_upper_bits(v, shift); __raw_writel(data, piobuf); data = get_upper_bits(v, ushift); piobuf++; addr++; l -= sizeof(u32); } /* * We still have 'extra' number of bytes leftover. */ if (l) { u32 v = *addr; if (l + extra >= sizeof(u32)) { data |= set_upper_bits(v, shift); len -= l + extra - sizeof(u32); if (len == length) { last = data; break; } __raw_writel(data, piobuf); piobuf++; extra = 0; data = 0; } else { /* Clear unused upper bytes */ data |= clear_upper_bytes(v, l, extra); if (len == length) { last = data; break; } extra += l; } } else if (len == length) { last = data; break; } } else if (len == length) { u32 w; /* * Need to round up for the last dword in the * packet. */ w = (len + 3) >> 2; qib_pio_copy(piobuf, ss->sge.vaddr, w - 1); piobuf += w - 1; last = ((u32 *) ss->sge.vaddr)[w - 1]; break; } else { u32 w = len >> 2; qib_pio_copy(piobuf, ss->sge.vaddr, w); piobuf += w; extra = len & (sizeof(u32) - 1); if (extra) { u32 v = ((u32 *) ss->sge.vaddr)[w]; /* Clear unused upper bytes */ data = clear_upper_bytes(v, extra, 0); } } update_sge(ss, len); length -= len; } /* Update address before sending packet. */ update_sge(ss, length); if (flush_wc) { /* must flush early everything before trigger word */ qib_flush_wc(); __raw_writel(last, piobuf); /* be sure trigger word is written */ qib_flush_wc(); } else __raw_writel(last, piobuf); } static noinline struct qib_verbs_txreq *__get_txreq(struct qib_ibdev *dev, struct qib_qp *qp) { struct qib_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 qib_verbs_txreq, txreq.list); } else { if (ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK && list_empty(&qp->iowait)) { dev->n_txwait++; qp->s_flags |= QIB_S_WAIT_TX; list_add_tail(&qp->iowait, &dev->txwait); } qp->s_flags &= ~QIB_S_BUSY; spin_unlock(&dev->pending_lock); spin_unlock_irqrestore(&qp->s_lock, flags); tx = ERR_PTR(-EBUSY); } return tx; } static inline struct qib_verbs_txreq *get_txreq(struct qib_ibdev *dev, struct qib_qp *qp) { struct qib_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 qib_verbs_txreq, txreq.list); } else { /* call slow path to get the extra lock */ spin_unlock_irqrestore(&dev->pending_lock, flags); tx = __get_txreq(dev, qp); } return tx; } void qib_put_txreq(struct qib_verbs_txreq *tx) { struct qib_ibdev *dev; struct qib_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) { qib_put_mr(tx->mr); tx->mr = NULL; } if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) { tx->txreq.flags &= ~QIB_SDMA_TXREQ_F_FREEBUF; dma_unmap_single(&dd_from_dev(dev)->pcidev->dev, tx->txreq.addr, tx->hdr_dwords << 2, DMA_TO_DEVICE); kfree(tx->align_buf); } 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)) { /* Wake up first QP wanting a free struct */ qp = list_entry(dev->txwait.next, struct qib_qp, iowait); list_del_init(&qp->iowait); atomic_inc(&qp->refcount); spin_unlock_irqrestore(&dev->pending_lock, flags); spin_lock_irqsave(&qp->s_lock, flags); if (qp->s_flags & QIB_S_WAIT_TX) { qp->s_flags &= ~QIB_S_WAIT_TX; qib_schedule_send(qp); } spin_unlock_irqrestore(&qp->s_lock, flags); if (atomic_dec_and_test(&qp->refcount)) wake_up(&qp->wait); } else spin_unlock_irqrestore(&dev->pending_lock, flags); } /* * This is called when there are send DMA descriptors that might be * available. * * This is called with ppd->sdma_lock held. */ void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail) { struct qib_qp *qp, *nqp; struct qib_qp *qps[20]; struct qib_ibdev *dev; unsigned i, n; n = 0; dev = &ppd->dd->verbs_dev; spin_lock(&dev->pending_lock); /* Search wait list for first QP wanting DMA descriptors. */ list_for_each_entry_safe(qp, nqp, &dev->dmawait, iowait) { if (qp->port_num != ppd->port) continue; if (n == ARRAY_SIZE(qps)) break; if (qp->s_tx->txreq.sg_count > avail) break; avail -= qp->s_tx->txreq.sg_count; list_del_init(&qp->iowait); atomic_inc(&qp->refcount); qps[n++] = qp; } spin_unlock(&dev->pending_lock); for (i = 0; i < n; i++) { qp = qps[i]; spin_lock(&qp->s_lock); if (qp->s_flags & QIB_S_WAIT_DMA_DESC) { qp->s_flags &= ~QIB_S_WAIT_DMA_DESC; qib_schedule_send(qp); } spin_unlock(&qp->s_lock); if (atomic_dec_and_test(&qp->refcount)) wake_up(&qp->wait); } } /* * This is called with ppd->sdma_lock held. */ static void sdma_complete(struct qib_sdma_txreq *cookie, int status) { struct qib_verbs_txreq *tx = container_of(cookie, struct qib_verbs_txreq, txreq); struct qib_qp *qp = tx->qp; spin_lock(&qp->s_lock); if (tx->wqe) qib_send_complete(qp, tx->wqe, IB_WC_SUCCESS); else if (qp->ibqp.qp_type == IB_QPT_RC) { struct qib_ib_header *hdr; if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) hdr = &tx->align_buf->hdr; else { struct qib_ibdev *dev = to_idev(qp->ibqp.device); hdr = &dev->pio_hdrs[tx->hdr_inx].hdr; } qib_rc_send_complete(qp, hdr); } if (atomic_dec_and_test(&qp->s_dma_busy)) { if (qp->state == IB_QPS_RESET) wake_up(&qp->wait_dma); else if (qp->s_flags & QIB_S_WAIT_DMA) { qp->s_flags &= ~QIB_S_WAIT_DMA; qib_schedule_send(qp); } } spin_unlock(&qp->s_lock); qib_put_txreq(tx); } static int wait_kmem(struct qib_ibdev *dev, struct qib_qp *qp) { unsigned long flags; int ret = 0; spin_lock_irqsave(&qp->s_lock, flags); if (ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK) { spin_lock(&dev->pending_lock); if (list_empty(&qp->iowait)) { if (list_empty(&dev->memwait)) mod_timer(&dev->mem_timer, jiffies + 1); qp->s_flags |= QIB_S_WAIT_KMEM; list_add_tail(&qp->iowait, &dev->memwait); } spin_unlock(&dev->pending_lock); qp->s_flags &= ~QIB_S_BUSY; ret = -EBUSY; } spin_unlock_irqrestore(&qp->s_lock, flags); return ret; } static int qib_verbs_send_dma(struct qib_qp *qp, struct qib_ib_header *hdr, u32 hdrwords, struct qib_sge_state *ss, u32 len, u32 plen, u32 dwords) { struct qib_ibdev *dev = to_idev(qp->ibqp.device); struct qib_devdata *dd = dd_from_dev(dev); struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct qib_pportdata *ppd = ppd_from_ibp(ibp); struct qib_verbs_txreq *tx; struct qib_pio_header *phdr; u32 control; u32 ndesc; int ret; tx = qp->s_tx; if (tx) { qp->s_tx = NULL; /* resend previously constructed packet */ ret = qib_sdma_verbs_send(ppd, tx->ss, tx->dwords, tx); goto bail; } tx = get_txreq(dev, qp); if (IS_ERR(tx)) goto bail_tx; control = dd->f_setpbc_control(ppd, plen, qp->s_srate, be16_to_cpu(hdr->lrh[0]) >> 12); tx->qp = qp; atomic_inc(&qp->refcount); tx->wqe = qp->s_wqe; tx->mr = qp->s_rdma_mr; if (qp->s_rdma_mr) qp->s_rdma_mr = NULL; tx->txreq.callback = sdma_complete; if (dd->flags & QIB_HAS_SDMA_TIMEOUT) tx->txreq.flags = QIB_SDMA_TXREQ_F_HEADTOHOST; else tx->txreq.flags = QIB_SDMA_TXREQ_F_INTREQ; if (plen + 1 > dd->piosize2kmax_dwords) tx->txreq.flags |= QIB_SDMA_TXREQ_F_USELARGEBUF; if (len) { /* * Don't try to DMA if it takes more descriptors than * the queue holds. */ ndesc = qib_count_sge(ss, len); if (ndesc >= ppd->sdma_descq_cnt) ndesc = 0; } else ndesc = 1; if (ndesc) { phdr = &dev->pio_hdrs[tx->hdr_inx]; phdr->pbc[0] = cpu_to_le32(plen); phdr->pbc[1] = cpu_to_le32(control); memcpy(&phdr->hdr, hdr, hdrwords << 2); tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEDESC; tx->txreq.sg_count = ndesc; tx->txreq.addr = dev->pio_hdrs_phys + tx->hdr_inx * sizeof(struct qib_pio_header); tx->hdr_dwords = hdrwords + 2; /* add PBC length */ ret = qib_sdma_verbs_send(ppd, ss, dwords, tx); goto bail; } /* Allocate a buffer and copy the header and payload to it. */ tx->hdr_dwords = plen + 1; phdr = kmalloc(tx->hdr_dwords << 2, GFP_ATOMIC); if (!phdr) goto err_tx; phdr->pbc[0] = cpu_to_le32(plen); phdr->pbc[1] = cpu_to_le32(control); memcpy(&phdr->hdr, hdr, hdrwords << 2); qib_copy_from_sge((u32 *) &phdr->hdr + hdrwords, ss, len); tx->txreq.addr = dma_map_single(&dd->pcidev->dev, phdr, tx->hdr_dwords << 2, DMA_TO_DEVICE); if (dma_mapping_error(&dd->pcidev->dev, tx->txreq.addr)) goto map_err; tx->align_buf = phdr; tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEBUF; tx->txreq.sg_count = 1; ret = qib_sdma_verbs_send(ppd, NULL, 0, tx); goto unaligned; map_err: kfree(phdr); err_tx: qib_put_txreq(tx); ret = wait_kmem(dev, qp); unaligned: ibp->n_unaligned++; bail: return ret; bail_tx: ret = PTR_ERR(tx); goto bail; } /* * If we are now in the error state, return zero to flush the * send work request. */ static int no_bufs_available(struct qib_qp *qp) { struct qib_ibdev *dev = to_idev(qp->ibqp.device); struct qib_devdata *dd; unsigned long flags; int ret = 0; /* * Note that as soon as want_buffer() is called and * possibly before it returns, qib_ib_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_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK) { spin_lock(&dev->pending_lock); if (list_empty(&qp->iowait)) { dev->n_piowait++; qp->s_flags |= QIB_S_WAIT_PIO; list_add_tail(&qp->iowait, &dev->piowait); dd = dd_from_dev(dev); dd->f_wantpiobuf_intr(dd, 1); } spin_unlock(&dev->pending_lock); qp->s_flags &= ~QIB_S_BUSY; ret = -EBUSY; } spin_unlock_irqrestore(&qp->s_lock, flags); return ret; } static int qib_verbs_send_pio(struct qib_qp *qp, struct qib_ib_header *ibhdr, u32 hdrwords, struct qib_sge_state *ss, u32 len, u32 plen, u32 dwords) { struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device); struct qib_pportdata *ppd = dd->pport + qp->port_num - 1; u32 *hdr = (u32 *) ibhdr; u32 __iomem *piobuf_orig; u32 __iomem *piobuf; u64 pbc; unsigned long flags; unsigned flush_wc; u32 control; u32 pbufn; control = dd->f_setpbc_control(ppd, plen, qp->s_srate, be16_to_cpu(ibhdr->lrh[0]) >> 12); pbc = ((u64) control << 32) | plen; piobuf = dd->f_getsendbuf(ppd, pbc, &pbufn); if (unlikely(piobuf == NULL)) return no_bufs_available(qp); /* * Write the pbc. * We have to flush after the PBC for correctness on some cpus * or WC buffer can be written out of order. */ writeq(pbc, piobuf); piobuf_orig = piobuf; piobuf += 2; flush_wc = dd->flags & QIB_PIO_FLUSH_WC; if (len == 0) { /* * If there is just the header portion, must flush before * writing last word of header for correctness, and after * the last header word (trigger word). */ if (flush_wc) { qib_flush_wc(); qib_pio_copy(piobuf, hdr, hdrwords - 1); qib_flush_wc(); __raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1); qib_flush_wc(); } else qib_pio_copy(piobuf, hdr, hdrwords); goto done; } if (flush_wc) qib_flush_wc(); qib_pio_copy(piobuf, hdr, hdrwords); piobuf += hdrwords; /* The common case is aligned and contained in one segment. */ if (likely(ss->num_sge == 1 && len <= ss->sge.length && !((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) { u32 *addr = (u32 *) ss->sge.vaddr; /* Update address before sending packet. */ update_sge(ss, len); if (flush_wc) { qib_pio_copy(piobuf, addr, dwords - 1); /* must flush early everything before trigger word */ qib_flush_wc(); __raw_writel(addr[dwords - 1], piobuf + dwords - 1); /* be sure trigger word is written */ qib_flush_wc(); } else qib_pio_copy(piobuf, addr, dwords); goto done; } copy_io(piobuf, ss, len, flush_wc); done: if (dd->flags & QIB_USE_SPCL_TRIG) { u32 spcl_off = (pbufn >= dd->piobcnt2k) ? 2047 : 1023; qib_flush_wc(); __raw_writel(0xaebecede, piobuf_orig + spcl_off); } qib_sendbuf_done(dd, pbufn); if (qp->s_rdma_mr) { qib_put_mr(qp->s_rdma_mr); qp->s_rdma_mr = NULL; } if (qp->s_wqe) { spin_lock_irqsave(&qp->s_lock, flags); qib_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS); spin_unlock_irqrestore(&qp->s_lock, flags); } else if (qp->ibqp.qp_type == IB_QPT_RC) { spin_lock_irqsave(&qp->s_lock, flags); qib_rc_send_complete(qp, ibhdr); spin_unlock_irqrestore(&qp->s_lock, flags); } return 0; } /** * qib_verbs_send - send a packet * @qp: the QP to send on * @hdr: 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 QIB_S_BUSY otherwise. */ int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr, u32 hdrwords, struct qib_sge_state *ss, u32 len) { struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device); u32 plen; int ret; u32 dwords = (len + 3) >> 2; /* * Calculate the send buffer trigger address. * The +1 counts for the pbc control dword following the pbc length. */ plen = hdrwords + dwords + 1; /* * 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 & QIB_HAS_SEND_DMA)) ret = qib_verbs_send_pio(qp, hdr, hdrwords, ss, len, plen, dwords); else ret = qib_verbs_send_dma(qp, hdr, hdrwords, ss, len, plen, dwords); return ret; } int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, u64 *rwords, u64 *spkts, u64 *rpkts, u64 *xmit_wait) { int ret; struct qib_devdata *dd = ppd->dd; if (!(dd->flags & QIB_PRESENT)) { /* no hardware, freeze, etc. */ ret = -EINVAL; goto bail; } *swords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDSEND); *rwords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDRCV); *spkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTSEND); *rpkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTRCV); *xmit_wait = dd->f_portcntr(ppd, QIBPORTCNTR_SENDSTALL); ret = 0; bail: return ret; } /** * qib_get_counters - get various chip counters * @dd: the qlogic_ib device * @cntrs: counters are placed here * * Return the counters needed by recv_pma_get_portcounters(). */ int qib_get_counters(struct qib_pportdata *ppd, struct qib_verbs_counters *cntrs) { int ret; if (!(ppd->dd->flags & QIB_PRESENT)) { /* no hardware, freeze, etc. */ ret = -EINVAL; goto bail; } cntrs->symbol_error_counter = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBSYMBOLERR); cntrs->link_error_recovery_counter = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKERRRECOV); /* * The link downed counter counts when the other side downs the * connection. We add in the number of times we downed the link * due to local link integrity errors to compensate. */ cntrs->link_downed_counter = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKDOWN); cntrs->port_rcv_errors = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXDROPPKT) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVOVFL) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERR_RLEN) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_INVALIDRLEN) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLINK) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRICRC) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRVCRC) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLPCRC) + ppd->dd->f_portcntr(ppd, QIBPORTCNTR_BADFORMAT); cntrs->port_rcv_errors += ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXLOCALPHYERR); cntrs->port_rcv_errors += ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXVLERR); cntrs->port_rcv_remphys_errors = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVEBP); cntrs->port_xmit_discards = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_UNSUPVL); cntrs->port_xmit_data = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_WORDSEND); cntrs->port_rcv_data = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_WORDRCV); cntrs->port_xmit_packets = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PKTSEND); cntrs->port_rcv_packets = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_PKTRCV); cntrs->local_link_integrity_errors = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_LLI); cntrs->excessive_buffer_overrun_errors = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_EXCESSBUFOVFL); cntrs->vl15_dropped = ppd->dd->f_portcntr(ppd, QIBPORTCNTR_VL15PKTDROP); ret = 0; bail: return ret; } /** * qib_ib_piobufavail - callback when a PIO buffer is available * @dd: the device pointer * * This is called from qib_intr() at interrupt level when a PIO buffer is * available after qib_verbs_send() returned an error that no buffers were * available. Disable the interrupt if there are no more QPs waiting. */ void qib_ib_piobufavail(struct qib_devdata *dd) { struct qib_ibdev *dev = &dd->verbs_dev; struct list_head *list; struct qib_qp *qps[5]; struct qib_qp *qp; unsigned long flags; unsigned i, n; list = &dev->piowait; n = 0; /* * Note: checking that the piowait list is empty and clearing * the buffer available interrupt needs to be atomic or we * could end up with QPs on the wait list with the interrupt * disabled. */ spin_lock_irqsave(&dev->pending_lock, flags); while (!list_empty(list)) { if (n == ARRAY_SIZE(qps)) goto full; qp = list_entry(list->next, struct qib_qp, iowait); list_del_init(&qp->iowait); atomic_inc(&qp->refcount); qps[n++] = qp; } dd->f_wantpiobuf_intr(dd, 0); full: spin_unlock_irqrestore(&dev->pending_lock, flags); for (i = 0; i < n; i++) { qp = qps[i]; spin_lock_irqsave(&qp->s_lock, flags); if (qp->s_flags & QIB_S_WAIT_PIO) { qp->s_flags &= ~QIB_S_WAIT_PIO; qib_schedule_send(qp); } spin_unlock_irqrestore(&qp->s_lock, flags); /* Notify qib_destroy_qp() if it is waiting. */ if (atomic_dec_and_test(&qp->refcount)) wake_up(&qp->wait); } } static int qib_query_device(struct ib_device *ibdev, struct ib_device_attr *props) { struct qib_devdata *dd = dd_from_ibdev(ibdev); struct qib_ibdev *dev = to_idev(ibdev); 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 = QIB_SRC_OUI_1 << 16 | QIB_SRC_OUI_2 << 8 | QIB_SRC_OUI_3; props->vendor_part_id = dd->deviceid; props->hw_ver = dd->minrev; props->sys_image_guid = ib_qib_sys_image_guid; props->max_mr_size = ~0ULL; props->max_qp = ib_qib_max_qps; props->max_qp_wr = ib_qib_max_qp_wrs; props->max_sge = ib_qib_max_sges; props->max_cq = ib_qib_max_cqs; props->max_ah = ib_qib_max_ahs; props->max_cqe = ib_qib_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 = ib_qib_max_pds; props->max_qp_rd_atom = QIB_MAX_RDMA_ATOMIC; props->max_qp_init_rd_atom = 255; /* props->max_res_rd_atom */ props->max_srq = ib_qib_max_srqs; props->max_srq_wr = ib_qib_max_srq_wrs; props->max_srq_sge = ib_qib_max_srq_sges; /* props->local_ca_ack_delay */ props->atomic_cap = IB_ATOMIC_GLOB; props->max_pkeys = qib_get_npkeys(dd); props->max_mcast_grp = ib_qib_max_mcast_grps; props->max_mcast_qp_attach = ib_qib_max_mcast_qp_attached; props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * props->max_mcast_grp; return 0; } static int qib_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props) { struct qib_devdata *dd = dd_from_ibdev(ibdev); struct qib_ibport *ibp = to_iport(ibdev, port); struct qib_pportdata *ppd = ppd_from_ibp(ibp); enum ib_mtu mtu; u16 lid = ppd->lid; memset(props, 0, sizeof(*props)); props->lid = lid ? lid : be16_to_cpu(IB_LID_PERMISSIVE); props->lmc = ppd->lmc; props->sm_lid = ibp->sm_lid; props->sm_sl = ibp->sm_sl; props->state = dd->f_iblink_state(ppd->lastibcstat); props->phys_state = dd->f_ibphys_portstate(ppd->lastibcstat); props->port_cap_flags = ibp->port_cap_flags; props->gid_tbl_len = QIB_GUIDS_PER_PORT; props->max_msg_sz = 0x80000000; props->pkey_tbl_len = qib_get_npkeys(dd); props->bad_pkey_cntr = ibp->pkey_violations; props->qkey_viol_cntr = ibp->qkey_violations; props->active_width = ppd->link_width_active; /* See rate_show() */ props->active_speed = ppd->link_speed_active; props->max_vl_num = qib_num_vls(ppd->vls_supported); props->init_type_reply = 0; props->max_mtu = qib_ibmtu ? qib_ibmtu : IB_MTU_4096; switch (ppd->ibmtu) { case 4096: mtu = IB_MTU_4096; break; case 2048: mtu = IB_MTU_2048; break; case 1024: mtu = IB_MTU_1024; break; case 512: mtu = IB_MTU_512; break; case 256: mtu = IB_MTU_256; break; default: mtu = IB_MTU_2048; } props->active_mtu = mtu; props->subnet_timeout = ibp->subnet_timeout; return 0; } static int qib_modify_device(struct ib_device *device, int device_modify_mask, struct ib_device_modify *device_modify) { struct qib_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 qib_ibport *ibp = &dd->pport[i].ibport_data; qib_node_desc_chg(ibp); } } if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) { ib_qib_sys_image_guid = cpu_to_be64(device_modify->sys_image_guid); for (i = 0; i < dd->num_pports; i++) { struct qib_ibport *ibp = &dd->pport[i].ibport_data; qib_sys_guid_chg(ibp); } } ret = 0; bail: return ret; } static int qib_modify_port(struct ib_device *ibdev, u8 port, int port_modify_mask, struct ib_port_modify *props) { struct qib_ibport *ibp = to_iport(ibdev, port); struct qib_pportdata *ppd = ppd_from_ibp(ibp); 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) qib_cap_mask_chg(ibp); if (port_modify_mask & IB_PORT_SHUTDOWN) qib_set_linkstate(ppd, QIB_IB_LINKDOWN); if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR) ibp->qkey_violations = 0; return 0; } static int qib_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid) { struct qib_devdata *dd = dd_from_ibdev(ibdev); int ret = 0; if (!port || port > dd->num_pports) ret = -EINVAL; else { struct qib_ibport *ibp = to_iport(ibdev, port); struct qib_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 < QIB_GUIDS_PER_PORT) gid->global.interface_id = ibp->guids[index - 1]; else ret = -EINVAL; } return ret; } static struct ib_pd *qib_alloc_pd(struct ib_device *ibdev, struct ib_ucontext *context, struct ib_udata *udata) { struct qib_ibdev *dev = to_idev(ibdev); struct qib_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 == ib_qib_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 qib_dealloc_pd(struct ib_pd *ibpd) { struct qib_pd *pd = to_ipd(ibpd); struct qib_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; } int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr) { /* A multicast address requires a GRH (see ch. 8.4.1). */ if (ah_attr->dlid >= QIB_MULTICAST_LID_BASE && ah_attr->dlid != QIB_PERMISSIVE_LID && !(ah_attr->ah_flags & IB_AH_GRH)) goto bail; if ((ah_attr->ah_flags & IB_AH_GRH) && ah_attr->grh.sgid_index >= QIB_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_mult(ah_attr->static_rate) < 0) goto bail; if (ah_attr->sl > 15) goto bail; return 0; bail: return -EINVAL; } /** * qib_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 *qib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) { struct qib_ah *ah; struct ib_ah *ret; struct qib_ibdev *dev = to_idev(pd->device); unsigned long flags; if (qib_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 == ib_qib_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 *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid) { struct ib_ah_attr attr; struct ib_ah *ah = ERR_PTR(-EINVAL); struct qib_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; } /** * qib_destroy_ah - destroy an address handle * @ibah: the AH to destroy * * This may be called from interrupt context. */ static int qib_destroy_ah(struct ib_ah *ibah) { struct qib_ibdev *dev = to_idev(ibah->device); struct qib_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 qib_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) { struct qib_ah *ah = to_iah(ibah); if (qib_check_ah(ibah->device, ah_attr)) return -EINVAL; ah->attr = *ah_attr; return 0; } static int qib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) { struct qib_ah *ah = to_iah(ibah); *ah_attr = ah->attr; return 0; } /** * qib_get_npkeys - return the size of the PKEY table for context 0 * @dd: the qlogic_ib device */ unsigned qib_get_npkeys(struct qib_devdata *dd) { return ARRAY_SIZE(dd->rcd[0]->pkeys); } /* * Return the indexed PKEY from the port PKEY table. * No need to validate rcd[ctxt]; the port is setup if we are here. */ unsigned qib_get_pkey(struct qib_ibport *ibp, unsigned index) { struct qib_pportdata *ppd = ppd_from_ibp(ibp); struct qib_devdata *dd = ppd->dd; unsigned ctxt = ppd->hw_pidx; unsigned ret; /* dd->rcd null if mini_init or some init failures */ if (!dd->rcd || index >= ARRAY_SIZE(dd->rcd[ctxt]->pkeys)) ret = 0; else ret = dd->rcd[ctxt]->pkeys[index]; return ret; } static int qib_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey) { struct qib_devdata *dd = dd_from_ibdev(ibdev); int ret; if (index >= qib_get_npkeys(dd)) { ret = -EINVAL; goto bail; } *pkey = qib_get_pkey(to_iport(ibdev, port), index); ret = 0; bail: return ret; } /** * qib_alloc_ucontext - allocate a ucontest * @ibdev: the infiniband device * @udata: not used by the QLogic_IB driver */ static struct ib_ucontext *qib_alloc_ucontext(struct ib_device *ibdev, struct ib_udata *udata) { struct qib_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 qib_dealloc_ucontext(struct ib_ucontext *context) { kfree(to_iucontext(context)); return 0; } static void init_ibport(struct qib_pportdata *ppd) { struct qib_verbs_counters cntrs; struct qib_ibport *ibp = &ppd->ibport_data; 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 = be16_to_cpu(IB_LID_PERMISSIVE); ibp->port_cap_flags = IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP | IB_PORT_SL_MAP_SUP | IB_PORT_TRAP_SUP | IB_PORT_AUTO_MIGR_SUP | IB_PORT_DR_NOTICE_SUP | IB_PORT_CAP_MASK_NOTICE_SUP | IB_PORT_OTHER_LOCAL_CHANGES_SUP; if (ppd->dd->flags & QIB_HAS_LINK_LATENCY) ibp->port_cap_flags |= IB_PORT_LINK_LATENCY_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; /* Snapshot current HW counters to "clear" them. */ qib_get_counters(ppd, &cntrs); ibp->z_symbol_error_counter = cntrs.symbol_error_counter; ibp->z_link_error_recovery_counter = cntrs.link_error_recovery_counter; ibp->z_link_downed_counter = cntrs.link_downed_counter; ibp->z_port_rcv_errors = cntrs.port_rcv_errors; ibp->z_port_rcv_remphys_errors = cntrs.port_rcv_remphys_errors; ibp->z_port_xmit_discards = cntrs.port_xmit_discards; ibp->z_port_xmit_data = cntrs.port_xmit_data; ibp->z_port_rcv_data = cntrs.port_rcv_data; ibp->z_port_xmit_packets = cntrs.port_xmit_packets; ibp->z_port_rcv_packets = cntrs.port_rcv_packets; ibp->z_local_link_integrity_errors = cntrs.local_link_integrity_errors; ibp->z_excessive_buffer_overrun_errors = cntrs.excessive_buffer_overrun_errors; ibp->z_vl15_dropped = cntrs.vl15_dropped; RCU_INIT_POINTER(ibp->qp0, NULL); RCU_INIT_POINTER(ibp->qp1, NULL); } /** * qib_register_ib_device - register our device with the infiniband core * @dd: the device data structure * Return the allocated qib_ibdev pointer or NULL on error. */ int qib_register_ib_device(struct qib_devdata *dd) { struct qib_ibdev *dev = &dd->verbs_dev; struct ib_device *ibdev = &dev->ibdev; struct qib_pportdata *ppd = dd->pport; unsigned i, lk_tab_size; int ret; dev->qp_table_size = ib_qib_qp_table_size; get_random_bytes(&dev->qp_rnd, sizeof(dev->qp_rnd)); dev->qp_table = kmalloc(dev->qp_table_size * sizeof *dev->qp_table, GFP_KERNEL); if (!dev->qp_table) { ret = -ENOMEM; goto err_qpt; } for (i = 0; i < dev->qp_table_size; i++) RCU_INIT_POINTER(dev->qp_table[i], NULL); for (i = 0; i < dd->num_pports; i++) init_ibport(ppd + i); /* Only need to initialize non-zero fields. */ spin_lock_init(&dev->qpt_lock); 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; qib_init_qpn_table(dd, &dev->qpn_table); /* * The top ib_qib_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 << ib_qib_lkey_table_size; lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table); dev->lk_table.table = (struct qib_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->piowait); INIT_LIST_HEAD(&dev->dmawait); INIT_LIST_HEAD(&dev->txwait); INIT_LIST_HEAD(&dev->memwait); INIT_LIST_HEAD(&dev->txreq_free); if (ppd->sdma_descq_cnt) { dev->pio_hdrs = dma_alloc_coherent(&dd->pcidev->dev, ppd->sdma_descq_cnt * sizeof(struct qib_pio_header), &dev->pio_hdrs_phys, GFP_KERNEL); if (!dev->pio_hdrs) { ret = -ENOMEM; goto err_hdrs; } } for (i = 0; i < ppd->sdma_descq_cnt; i++) { struct qib_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_qib_sys_image_guid) ib_qib_sys_image_guid = ppd->guid; strlcpy(ibdev->name, "qib%d", IB_DEVICE_NAME_MAX); ibdev->owner = THIS_MODULE; ibdev->node_guid = ppd->guid; ibdev->uverbs_abi_ver = QIB_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 = qib_query_device; ibdev->modify_device = qib_modify_device; ibdev->query_port = qib_query_port; ibdev->modify_port = qib_modify_port; ibdev->query_pkey = qib_query_pkey; ibdev->query_gid = qib_query_gid; ibdev->alloc_ucontext = qib_alloc_ucontext; ibdev->dealloc_ucontext = qib_dealloc_ucontext; ibdev->alloc_pd = qib_alloc_pd; ibdev->dealloc_pd = qib_dealloc_pd; ibdev->create_ah = qib_create_ah; ibdev->destroy_ah = qib_destroy_ah; ibdev->modify_ah = qib_modify_ah; ibdev->query_ah = qib_query_ah; ibdev->create_srq = qib_create_srq; ibdev->modify_srq = qib_modify_srq; ibdev->query_srq = qib_query_srq; ibdev->destroy_srq = qib_destroy_srq; ibdev->create_qp = qib_create_qp; ibdev->modify_qp = qib_modify_qp; ibdev->query_qp = qib_query_qp; ibdev->destroy_qp = qib_destroy_qp; ibdev->post_send = qib_post_send; ibdev->post_recv = qib_post_receive; ibdev->post_srq_recv = qib_post_srq_receive; ibdev->create_cq = qib_create_cq; ibdev->destroy_cq = qib_destroy_cq; ibdev->resize_cq = qib_resize_cq; ibdev->poll_cq = qib_poll_cq; ibdev->req_notify_cq = qib_req_notify_cq; ibdev->get_dma_mr = qib_get_dma_mr; ibdev->reg_phys_mr = qib_reg_phys_mr; ibdev->reg_user_mr = qib_reg_user_mr; ibdev->dereg_mr = qib_dereg_mr; ibdev->alloc_fast_reg_mr = qib_alloc_fast_reg_mr; ibdev->alloc_fast_reg_page_list = qib_alloc_fast_reg_page_list; ibdev->free_fast_reg_page_list = qib_free_fast_reg_page_list; ibdev->alloc_fmr = qib_alloc_fmr; ibdev->map_phys_fmr = qib_map_phys_fmr; ibdev->unmap_fmr = qib_unmap_fmr; ibdev->dealloc_fmr = qib_dealloc_fmr; ibdev->attach_mcast = qib_multicast_attach; ibdev->detach_mcast = qib_multicast_detach; ibdev->process_mad = qib_process_mad; ibdev->mmap = qib_mmap; ibdev->dma_ops = &qib_dma_mapping_ops; snprintf(ibdev->node_desc, sizeof(ibdev->node_desc), "Intel Infiniband HCA %s", init_utsname()->nodename); ret = ib_register_device(ibdev, qib_create_port_files); if (ret) goto err_reg; ret = qib_create_agents(dev); if (ret) goto err_agents; ret = qib_verbs_register_sysfs(dd); if (ret) goto err_class; goto bail; err_class: qib_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 qib_verbs_txreq *tx; list_del(l); tx = list_entry(l, struct qib_verbs_txreq, txreq.list); kfree(tx); } if (ppd->sdma_descq_cnt) dma_free_coherent(&dd->pcidev->dev, ppd->sdma_descq_cnt * sizeof(struct qib_pio_header), dev->pio_hdrs, dev->pio_hdrs_phys); err_hdrs: free_pages((unsigned long) dev->lk_table.table, get_order(lk_tab_size)); err_lk: kfree(dev->qp_table); err_qpt: qib_dev_err(dd, "cannot register verbs: %d!\n", -ret); bail: return ret; } void qib_unregister_ib_device(struct qib_devdata *dd) { struct qib_ibdev *dev = &dd->verbs_dev; struct ib_device *ibdev = &dev->ibdev; u32 qps_inuse; unsigned lk_tab_size; qib_verbs_unregister_sysfs(dd); qib_free_agents(dev); ib_unregister_device(ibdev); if (!list_empty(&dev->piowait)) qib_dev_err(dd, "piowait list not empty!\n"); if (!list_empty(&dev->dmawait)) qib_dev_err(dd, "dmawait list not empty!\n"); if (!list_empty(&dev->txwait)) qib_dev_err(dd, "txwait list not empty!\n"); if (!list_empty(&dev->memwait)) qib_dev_err(dd, "memwait list not empty!\n"); if (dev->dma_mr) qib_dev_err(dd, "DMA MR not NULL!\n"); qps_inuse = qib_free_all_qps(dd); if (qps_inuse) qib_dev_err(dd, "QP memory leak! %u still in use\n", qps_inuse); del_timer_sync(&dev->mem_timer); qib_free_qpn_table(&dev->qpn_table); while (!list_empty(&dev->txreq_free)) { struct list_head *l = dev->txreq_free.next; struct qib_verbs_txreq *tx; list_del(l); tx = list_entry(l, struct qib_verbs_txreq, txreq.list); kfree(tx); } if (dd->pport->sdma_descq_cnt) dma_free_coherent(&dd->pcidev->dev, dd->pport->sdma_descq_cnt * sizeof(struct qib_pio_header), 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)); kfree(dev->qp_table); } /* * This must be called with s_lock held. */ void qib_schedule_send(struct qib_qp *qp) { if (qib_send_ok(qp)) { struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); struct qib_pportdata *ppd = ppd_from_ibp(ibp); queue_work(ppd->qib_wq, &qp->s_work); } }