diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_ud.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_ud.c | 580 |
1 files changed, 0 insertions, 580 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_ud.c b/drivers/infiniband/hw/ipath/ipath_ud.c deleted file mode 100644 index e8a2a915251e..000000000000 --- a/drivers/infiniband/hw/ipath/ipath_ud.c +++ /dev/null @@ -1,580 +0,0 @@ -/* - * Copyright (c) 2006, 2007, 2008 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 <linux/sched.h> -#include <rdma/ib_smi.h> - -#include "ipath_verbs.h" -#include "ipath_kernel.h" - -/** - * ipath_ud_loopback - handle send on loopback QPs - * @sqp: the sending QP - * @swqe: the send work request - * - * This is called from ipath_make_ud_req() to forward a WQE addressed - * to the same HCA. - * Note that the receive interrupt handler may be calling ipath_ud_rcv() - * while this is being called. - */ -static void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_swqe *swqe) -{ - struct ipath_ibdev *dev = to_idev(sqp->ibqp.device); - struct ipath_qp *qp; - struct ib_ah_attr *ah_attr; - unsigned long flags; - struct ipath_rq *rq; - struct ipath_srq *srq; - struct ipath_sge_state rsge; - struct ipath_sge *sge; - struct ipath_rwq *wq; - struct ipath_rwqe *wqe; - void (*handler)(struct ib_event *, void *); - struct ib_wc wc; - u32 tail; - u32 rlen; - u32 length; - - qp = ipath_lookup_qpn(&dev->qp_table, swqe->wr.wr.ud.remote_qpn); - if (!qp || !(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) { - dev->n_pkt_drops++; - goto done; - } - - /* - * Check that the qkey matches (except for QP0, see 9.6.1.4.1). - * Qkeys with the high order bit set mean use the - * qkey from the QP context instead of the WR (see 10.2.5). - */ - if (unlikely(qp->ibqp.qp_num && - ((int) swqe->wr.wr.ud.remote_qkey < 0 ? - sqp->qkey : swqe->wr.wr.ud.remote_qkey) != qp->qkey)) { - /* XXX OK to lose a count once in a while. */ - dev->qkey_violations++; - dev->n_pkt_drops++; - goto drop; - } - - /* - * A GRH is expected to precede the data even if not - * present on the wire. - */ - length = swqe->length; - memset(&wc, 0, sizeof wc); - wc.byte_len = length + sizeof(struct ib_grh); - - if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) { - wc.wc_flags = IB_WC_WITH_IMM; - wc.ex.imm_data = swqe->wr.ex.imm_data; - } - - /* - * This would be a lot simpler if we could call ipath_get_rwqe() - * but that uses state that the receive interrupt handler uses - * so we would need to lock out receive interrupts while doing - * local loopback. - */ - if (qp->ibqp.srq) { - srq = to_isrq(qp->ibqp.srq); - handler = srq->ibsrq.event_handler; - rq = &srq->rq; - } else { - srq = NULL; - handler = NULL; - rq = &qp->r_rq; - } - - /* - * Get the next work request entry to find where to put the data. - * Note that it is safe to drop the lock after changing rq->tail - * since ipath_post_receive() won't fill the empty slot. - */ - spin_lock_irqsave(&rq->lock, flags); - wq = rq->wq; - tail = wq->tail; - /* Validate tail before using it since it is user writable. */ - if (tail >= rq->size) - tail = 0; - if (unlikely(tail == wq->head)) { - spin_unlock_irqrestore(&rq->lock, flags); - dev->n_pkt_drops++; - goto drop; - } - wqe = get_rwqe_ptr(rq, tail); - rsge.sg_list = qp->r_ud_sg_list; - if (!ipath_init_sge(qp, wqe, &rlen, &rsge)) { - spin_unlock_irqrestore(&rq->lock, flags); - dev->n_pkt_drops++; - goto drop; - } - /* Silently drop packets which are too big. */ - if (wc.byte_len > rlen) { - spin_unlock_irqrestore(&rq->lock, flags); - dev->n_pkt_drops++; - goto drop; - } - if (++tail >= rq->size) - tail = 0; - wq->tail = tail; - wc.wr_id = wqe->wr_id; - if (handler) { - u32 n; - - /* - * validate head pointer value and compute - * the number of remaining WQEs. - */ - n = wq->head; - if (n >= rq->size) - n = 0; - if (n < tail) - n += rq->size - tail; - else - n -= tail; - if (n < srq->limit) { - struct ib_event ev; - - srq->limit = 0; - spin_unlock_irqrestore(&rq->lock, flags); - ev.device = qp->ibqp.device; - ev.element.srq = qp->ibqp.srq; - ev.event = IB_EVENT_SRQ_LIMIT_REACHED; - handler(&ev, srq->ibsrq.srq_context); - } else - spin_unlock_irqrestore(&rq->lock, flags); - } else - spin_unlock_irqrestore(&rq->lock, flags); - - ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr; - if (ah_attr->ah_flags & IB_AH_GRH) { - ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh)); - wc.wc_flags |= IB_WC_GRH; - } else - ipath_skip_sge(&rsge, sizeof(struct ib_grh)); - sge = swqe->sg_list; - while (length) { - u32 len = sge->length; - - if (len > length) - len = length; - if (len > sge->sge_length) - len = sge->sge_length; - BUG_ON(len == 0); - ipath_copy_sge(&rsge, sge->vaddr, len); - sge->vaddr += len; - sge->length -= len; - sge->sge_length -= len; - if (sge->sge_length == 0) { - if (--swqe->wr.num_sge) - sge++; - } else if (sge->length == 0 && sge->mr != NULL) { - if (++sge->n >= IPATH_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; - } - wc.status = IB_WC_SUCCESS; - wc.opcode = IB_WC_RECV; - wc.qp = &qp->ibqp; - wc.src_qp = sqp->ibqp.qp_num; - /* XXX do we know which pkey matched? Only needed for GSI. */ - wc.pkey_index = 0; - wc.slid = dev->dd->ipath_lid | - (ah_attr->src_path_bits & - ((1 << dev->dd->ipath_lmc) - 1)); - wc.sl = ah_attr->sl; - wc.dlid_path_bits = - ah_attr->dlid & ((1 << dev->dd->ipath_lmc) - 1); - wc.port_num = 1; - /* Signal completion event if the solicited bit is set. */ - ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, - swqe->wr.send_flags & IB_SEND_SOLICITED); -drop: - if (atomic_dec_and_test(&qp->refcount)) - wake_up(&qp->wait); -done:; -} - -/** - * ipath_make_ud_req - construct a UD request packet - * @qp: the QP - * - * Return 1 if constructed; otherwise, return 0. - */ -int ipath_make_ud_req(struct ipath_qp *qp) -{ - struct ipath_ibdev *dev = to_idev(qp->ibqp.device); - struct ipath_other_headers *ohdr; - struct ib_ah_attr *ah_attr; - struct ipath_swqe *wqe; - unsigned long flags; - u32 nwords; - u32 extra_bytes; - u32 bth0; - u16 lrh0; - u16 lid; - int ret = 0; - int next_cur; - - spin_lock_irqsave(&qp->s_lock, flags); - - if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_NEXT_SEND_OK)) { - if (!(ib_ipath_state_ops[qp->state] & IPATH_FLUSH_SEND)) - goto bail; - /* We are in the error state, flush the work request. */ - if (qp->s_last == qp->s_head) - goto bail; - /* If DMAs are in progress, we can't flush immediately. */ - if (atomic_read(&qp->s_dma_busy)) { - qp->s_flags |= IPATH_S_WAIT_DMA; - goto bail; - } - wqe = get_swqe_ptr(qp, qp->s_last); - ipath_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); - goto done; - } - - if (qp->s_cur == qp->s_head) - goto bail; - - wqe = get_swqe_ptr(qp, qp->s_cur); - next_cur = qp->s_cur + 1; - if (next_cur >= qp->s_size) - next_cur = 0; - - /* Construct the header. */ - ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr; - if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE) { - if (ah_attr->dlid != IPATH_PERMISSIVE_LID) - dev->n_multicast_xmit++; - else - dev->n_unicast_xmit++; - } else { - dev->n_unicast_xmit++; - lid = ah_attr->dlid & ~((1 << dev->dd->ipath_lmc) - 1); - if (unlikely(lid == dev->dd->ipath_lid)) { - /* - * If DMAs are in progress, we can't generate - * a completion for the loopback packet since - * it would be out of order. - * XXX Instead of waiting, we could queue a - * zero length descriptor so we get a callback. - */ - if (atomic_read(&qp->s_dma_busy)) { - qp->s_flags |= IPATH_S_WAIT_DMA; - goto bail; - } - qp->s_cur = next_cur; - spin_unlock_irqrestore(&qp->s_lock, flags); - ipath_ud_loopback(qp, wqe); - spin_lock_irqsave(&qp->s_lock, flags); - ipath_send_complete(qp, wqe, IB_WC_SUCCESS); - goto done; - } - } - - qp->s_cur = next_cur; - extra_bytes = -wqe->length & 3; - nwords = (wqe->length + extra_bytes) >> 2; - - /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */ - qp->s_hdrwords = 7; - qp->s_cur_size = wqe->length; - qp->s_cur_sge = &qp->s_sge; - qp->s_dmult = ah_attr->static_rate; - qp->s_wqe = wqe; - qp->s_sge.sge = wqe->sg_list[0]; - qp->s_sge.sg_list = wqe->sg_list + 1; - qp->s_sge.num_sge = wqe->wr.num_sge; - - if (ah_attr->ah_flags & IB_AH_GRH) { - /* Header size in 32-bit words. */ - qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh, - &ah_attr->grh, - qp->s_hdrwords, nwords); - lrh0 = IPATH_LRH_GRH; - ohdr = &qp->s_hdr.u.l.oth; - /* - * Don't worry about sending to locally attached multicast - * QPs. It is unspecified by the spec. what happens. - */ - } else { - /* Header size in 32-bit words. */ - lrh0 = IPATH_LRH_BTH; - ohdr = &qp->s_hdr.u.oth; - } - if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) { - qp->s_hdrwords++; - ohdr->u.ud.imm_data = wqe->wr.ex.imm_data; - bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24; - } else - bth0 = IB_OPCODE_UD_SEND_ONLY << 24; - lrh0 |= ah_attr->sl << 4; - if (qp->ibqp.qp_type == IB_QPT_SMI) - lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */ - qp->s_hdr.lrh[0] = cpu_to_be16(lrh0); - qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */ - qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords + - SIZE_OF_CRC); - lid = dev->dd->ipath_lid; - if (lid) { - lid |= ah_attr->src_path_bits & - ((1 << dev->dd->ipath_lmc) - 1); - qp->s_hdr.lrh[3] = cpu_to_be16(lid); - } else - qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE; - if (wqe->wr.send_flags & IB_SEND_SOLICITED) - bth0 |= 1 << 23; - bth0 |= extra_bytes << 20; - bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPATH_DEFAULT_P_KEY : - ipath_get_pkey(dev->dd, qp->s_pkey_index); - ohdr->bth[0] = cpu_to_be32(bth0); - /* - * Use the multicast QP if the destination LID is a multicast LID. - */ - ohdr->bth[1] = ah_attr->dlid >= IPATH_MULTICAST_LID_BASE && - ah_attr->dlid != IPATH_PERMISSIVE_LID ? - cpu_to_be32(IPATH_MULTICAST_QPN) : - cpu_to_be32(wqe->wr.wr.ud.remote_qpn); - ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPATH_PSN_MASK); - /* - * Qkeys with the high order bit set mean use the - * qkey from the QP context instead of the WR (see 10.2.5). - */ - ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ? - qp->qkey : wqe->wr.wr.ud.remote_qkey); - ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num); - -done: - ret = 1; - goto unlock; - -bail: - qp->s_flags &= ~IPATH_S_BUSY; -unlock: - spin_unlock_irqrestore(&qp->s_lock, flags); - return ret; -} - -/** - * ipath_ud_rcv - receive an incoming UD packet - * @dev: the device the packet came in on - * @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 ipath_qp_rcv() to process an incoming UD packet - * for the given QP. - * Called at interrupt level. - */ -void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr, - int has_grh, void *data, u32 tlen, struct ipath_qp *qp) -{ - struct ipath_other_headers *ohdr; - int opcode; - u32 hdrsize; - u32 pad; - struct ib_wc wc; - u32 qkey; - u32 src_qp; - u16 dlid; - int header_in_data; - - /* Check for GRH */ - if (!has_grh) { - ohdr = &hdr->u.oth; - hdrsize = 8 + 12 + 8; /* LRH + BTH + DETH */ - qkey = be32_to_cpu(ohdr->u.ud.deth[0]); - src_qp = be32_to_cpu(ohdr->u.ud.deth[1]); - header_in_data = 0; - } else { - ohdr = &hdr->u.l.oth; - hdrsize = 8 + 40 + 12 + 8; /* LRH + GRH + BTH + DETH */ - /* - * The header with GRH is 68 bytes and the core driver sets - * the eager header buffer size to 56 bytes so the last 12 - * bytes of the IB header is in the data buffer. - */ - header_in_data = dev->dd->ipath_rcvhdrentsize == 16; - if (header_in_data) { - qkey = be32_to_cpu(((__be32 *) data)[1]); - src_qp = be32_to_cpu(((__be32 *) data)[2]); - data += 12; - } else { - qkey = be32_to_cpu(ohdr->u.ud.deth[0]); - src_qp = be32_to_cpu(ohdr->u.ud.deth[1]); - } - } - src_qp &= IPATH_QPN_MASK; - - /* - * Check that the permissive LID is only used on QP0 - * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1). - */ - if (qp->ibqp.qp_num) { - if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE || - hdr->lrh[3] == IB_LID_PERMISSIVE)) { - dev->n_pkt_drops++; - goto bail; - } - if (unlikely(qkey != qp->qkey)) { - /* XXX OK to lose a count once in a while. */ - dev->qkey_violations++; - dev->n_pkt_drops++; - goto bail; - } - } else if (hdr->lrh[1] == IB_LID_PERMISSIVE || - hdr->lrh[3] == IB_LID_PERMISSIVE) { - struct ib_smp *smp = (struct ib_smp *) data; - - if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { - dev->n_pkt_drops++; - goto bail; - } - } - - /* - * The opcode is in the low byte when its in network order - * (top byte when in host order). - */ - opcode = be32_to_cpu(ohdr->bth[0]) >> 24; - if (qp->ibqp.qp_num > 1 && - opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) { - if (header_in_data) { - wc.ex.imm_data = *(__be32 *) data; - data += sizeof(__be32); - } else - wc.ex.imm_data = ohdr->u.ud.imm_data; - wc.wc_flags = IB_WC_WITH_IMM; - hdrsize += sizeof(u32); - } else if (opcode == IB_OPCODE_UD_SEND_ONLY) { - wc.ex.imm_data = 0; - wc.wc_flags = 0; - } else { - dev->n_pkt_drops++; - goto bail; - } - - /* Get the number of bytes the message was padded by. */ - pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; - if (unlikely(tlen < (hdrsize + pad + 4))) { - /* Drop incomplete packets. */ - dev->n_pkt_drops++; - goto bail; - } - tlen -= hdrsize + pad + 4; - - /* Drop invalid MAD packets (see 13.5.3.1). */ - if (unlikely((qp->ibqp.qp_num == 0 && - (tlen != 256 || - (be16_to_cpu(hdr->lrh[0]) >> 12) != 15)) || - (qp->ibqp.qp_num == 1 && - (tlen != 256 || - (be16_to_cpu(hdr->lrh[0]) >> 12) == 15)))) { - dev->n_pkt_drops++; - goto bail; - } - - /* - * A GRH is expected to precede the data even if not - * present on the wire. - */ - wc.byte_len = tlen + sizeof(struct ib_grh); - - /* - * Get the next work request entry to find where to put the data. - */ - if (qp->r_flags & IPATH_R_REUSE_SGE) - qp->r_flags &= ~IPATH_R_REUSE_SGE; - else if (!ipath_get_rwqe(qp, 0)) { - /* - * Count VL15 packets dropped due to no receive buffer. - * Otherwise, count them as buffer overruns since usually, - * the HW will be able to receive packets even if there are - * no QPs with posted receive buffers. - */ - if (qp->ibqp.qp_num == 0) - dev->n_vl15_dropped++; - else - dev->rcv_errors++; - goto bail; - } - /* Silently drop packets which are too big. */ - if (wc.byte_len > qp->r_len) { - qp->r_flags |= IPATH_R_REUSE_SGE; - dev->n_pkt_drops++; - goto bail; - } - if (has_grh) { - ipath_copy_sge(&qp->r_sge, &hdr->u.l.grh, - sizeof(struct ib_grh)); - wc.wc_flags |= IB_WC_GRH; - } else - ipath_skip_sge(&qp->r_sge, sizeof(struct ib_grh)); - ipath_copy_sge(&qp->r_sge, data, - wc.byte_len - sizeof(struct ib_grh)); - if (!test_and_clear_bit(IPATH_R_WRID_VALID, &qp->r_aflags)) - goto bail; - wc.wr_id = qp->r_wr_id; - wc.status = IB_WC_SUCCESS; - wc.opcode = IB_WC_RECV; - wc.vendor_err = 0; - wc.qp = &qp->ibqp; - wc.src_qp = src_qp; - /* XXX do we know which pkey matched? Only needed for GSI. */ - wc.pkey_index = 0; - wc.slid = be16_to_cpu(hdr->lrh[3]); - wc.sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF; - dlid = be16_to_cpu(hdr->lrh[1]); - /* - * Save the LMC lower bits if the destination LID is a unicast LID. - */ - wc.dlid_path_bits = dlid >= IPATH_MULTICAST_LID_BASE ? 0 : - dlid & ((1 << dev->dd->ipath_lmc) - 1); - wc.port_num = 1; - /* Signal completion event if the solicited bit is set. */ - ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, - (ohdr->bth[0] & - cpu_to_be32(1 << 23)) != 0); - -bail:; -} |
