[PATCH] IB/ipath: share more common code between RC and UC protocols
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Cc: "Michael S. Tsirkin" <mst@mellanox.co.il> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
parent
759d57686d
commit
ddd4bb2210
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@ -709,9 +709,7 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
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spin_lock_init(&qp->r_rq.lock);
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atomic_set(&qp->refcount, 0);
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init_waitqueue_head(&qp->wait);
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tasklet_init(&qp->s_task,
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init_attr->qp_type == IB_QPT_RC ?
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ipath_do_rc_send : ipath_do_uc_send,
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tasklet_init(&qp->s_task, ipath_do_ruc_send,
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(unsigned long)qp);
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INIT_LIST_HEAD(&qp->piowait);
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INIT_LIST_HEAD(&qp->timerwait);
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@ -896,9 +894,9 @@ void ipath_get_credit(struct ipath_qp *qp, u32 aeth)
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* as many packets as we like. Otherwise, we have to
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* honor the credit field.
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*/
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if (credit == IPS_AETH_CREDIT_INVAL) {
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if (credit == IPS_AETH_CREDIT_INVAL)
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qp->s_lsn = (u32) -1;
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} else if (qp->s_lsn != (u32) -1) {
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else if (qp->s_lsn != (u32) -1) {
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/* Compute new LSN (i.e., MSN + credit) */
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credit = (aeth + credit_table[credit]) & IPS_MSN_MASK;
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if (ipath_cmp24(credit, qp->s_lsn) > 0)
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@ -73,9 +73,9 @@ static void ipath_init_restart(struct ipath_qp *qp, struct ipath_swqe *wqe)
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* Return bth0 if constructed; otherwise, return 0.
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* Note the QP s_lock must be held.
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*/
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static inline u32 ipath_make_rc_ack(struct ipath_qp *qp,
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struct ipath_other_headers *ohdr,
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u32 pmtu)
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u32 ipath_make_rc_ack(struct ipath_qp *qp,
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struct ipath_other_headers *ohdr,
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u32 pmtu)
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{
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struct ipath_sge_state *ss;
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u32 hwords;
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@ -96,8 +96,7 @@ static inline u32 ipath_make_rc_ack(struct ipath_qp *qp,
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if (len > pmtu) {
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len = pmtu;
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qp->s_ack_state = OP(RDMA_READ_RESPONSE_FIRST);
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}
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else
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} else
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qp->s_ack_state = OP(RDMA_READ_RESPONSE_ONLY);
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qp->s_rdma_len -= len;
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bth0 = qp->s_ack_state << 24;
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@ -177,9 +176,9 @@ static inline u32 ipath_make_rc_ack(struct ipath_qp *qp,
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* Return 1 if constructed; otherwise, return 0.
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* Note the QP s_lock must be held.
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*/
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static inline int ipath_make_rc_req(struct ipath_qp *qp,
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struct ipath_other_headers *ohdr,
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u32 pmtu, u32 *bth0p, u32 *bth2p)
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int ipath_make_rc_req(struct ipath_qp *qp,
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struct ipath_other_headers *ohdr,
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u32 pmtu, u32 *bth0p, u32 *bth2p)
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{
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struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
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struct ipath_sge_state *ss;
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@ -497,160 +496,33 @@ done:
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return 0;
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}
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static inline void ipath_make_rc_grh(struct ipath_qp *qp,
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struct ib_global_route *grh,
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u32 nwords)
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{
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struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
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/* GRH header size in 32-bit words. */
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qp->s_hdrwords += 10;
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qp->s_hdr.u.l.grh.version_tclass_flow =
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cpu_to_be32((6 << 28) |
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(grh->traffic_class << 20) |
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grh->flow_label);
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qp->s_hdr.u.l.grh.paylen =
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cpu_to_be16(((qp->s_hdrwords - 12) + nwords +
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SIZE_OF_CRC) << 2);
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/* next_hdr is defined by C8-7 in ch. 8.4.1 */
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qp->s_hdr.u.l.grh.next_hdr = 0x1B;
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qp->s_hdr.u.l.grh.hop_limit = grh->hop_limit;
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/* The SGID is 32-bit aligned. */
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qp->s_hdr.u.l.grh.sgid.global.subnet_prefix = dev->gid_prefix;
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qp->s_hdr.u.l.grh.sgid.global.interface_id =
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ipath_layer_get_guid(dev->dd);
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qp->s_hdr.u.l.grh.dgid = grh->dgid;
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}
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/**
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* ipath_do_rc_send - perform a send on an RC QP
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* @data: contains a pointer to the QP
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* send_rc_ack - Construct an ACK packet and send it
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* @qp: a pointer to the QP
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*
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* Process entries in the send work queue until credit or queue is
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* exhausted. Only allow one CPU to send a packet per QP (tasklet).
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* Otherwise, after we drop the QP s_lock, two threads could send
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* packets out of order.
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* This is called from ipath_rc_rcv() and only uses the receive
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* side QP state.
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* Note that RDMA reads are handled in the send side QP state and tasklet.
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*/
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void ipath_do_rc_send(unsigned long data)
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{
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struct ipath_qp *qp = (struct ipath_qp *)data;
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struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
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unsigned long flags;
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u16 lrh0;
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u32 nwords;
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u32 extra_bytes;
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u32 bth0;
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u32 bth2;
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u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
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struct ipath_other_headers *ohdr;
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if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags))
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goto bail;
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if (unlikely(qp->remote_ah_attr.dlid ==
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ipath_layer_get_lid(dev->dd))) {
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struct ib_wc wc;
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/*
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* Pass in an uninitialized ib_wc to be consistent with
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* other places where ipath_ruc_loopback() is called.
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*/
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ipath_ruc_loopback(qp, &wc);
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goto clear;
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}
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ohdr = &qp->s_hdr.u.oth;
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if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
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ohdr = &qp->s_hdr.u.l.oth;
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again:
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/* Check for a constructed packet to be sent. */
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if (qp->s_hdrwords != 0) {
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/*
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* If no PIO bufs are available, return. An interrupt will
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* call ipath_ib_piobufavail() when one is available.
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*/
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_VERBS_INFO("h %u %p\n", qp->s_hdrwords, &qp->s_hdr);
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_VERBS_INFO("d %u %p %u %p %u %u %u %u\n", qp->s_cur_size,
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qp->s_cur_sge->sg_list,
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qp->s_cur_sge->num_sge,
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qp->s_cur_sge->sge.vaddr,
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qp->s_cur_sge->sge.sge_length,
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qp->s_cur_sge->sge.length,
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qp->s_cur_sge->sge.m,
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qp->s_cur_sge->sge.n);
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if (ipath_verbs_send(dev->dd, qp->s_hdrwords,
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(u32 *) &qp->s_hdr, qp->s_cur_size,
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qp->s_cur_sge)) {
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ipath_no_bufs_available(qp, dev);
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goto bail;
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}
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dev->n_unicast_xmit++;
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/* Record that we sent the packet and s_hdr is empty. */
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qp->s_hdrwords = 0;
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}
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/*
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* The lock is needed to synchronize between setting
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* qp->s_ack_state, resend timer, and post_send().
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*/
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spin_lock_irqsave(&qp->s_lock, flags);
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/* Sending responses has higher priority over sending requests. */
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if (qp->s_ack_state != OP(ACKNOWLEDGE) &&
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(bth0 = ipath_make_rc_ack(qp, ohdr, pmtu)) != 0)
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bth2 = qp->s_ack_psn++ & IPS_PSN_MASK;
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else if (!ipath_make_rc_req(qp, ohdr, pmtu, &bth0, &bth2))
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goto done;
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spin_unlock_irqrestore(&qp->s_lock, flags);
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/* Construct the header. */
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extra_bytes = (4 - qp->s_cur_size) & 3;
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nwords = (qp->s_cur_size + extra_bytes) >> 2;
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lrh0 = IPS_LRH_BTH;
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if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
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ipath_make_rc_grh(qp, &qp->remote_ah_attr.grh, nwords);
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lrh0 = IPS_LRH_GRH;
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}
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lrh0 |= qp->remote_ah_attr.sl << 4;
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qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
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qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
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qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords +
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SIZE_OF_CRC);
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qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
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bth0 |= ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
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bth0 |= extra_bytes << 20;
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ohdr->bth[0] = cpu_to_be32(bth0);
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ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
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ohdr->bth[2] = cpu_to_be32(bth2);
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/* Check for more work to do. */
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goto again;
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done:
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spin_unlock_irqrestore(&qp->s_lock, flags);
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clear:
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clear_bit(IPATH_S_BUSY, &qp->s_flags);
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bail:
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return;
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}
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static void send_rc_ack(struct ipath_qp *qp)
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{
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struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
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u16 lrh0;
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u32 bth0;
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u32 hwords;
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struct ipath_ib_header hdr;
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struct ipath_other_headers *ohdr;
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/* Construct the header. */
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ohdr = &qp->s_hdr.u.oth;
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ohdr = &hdr.u.oth;
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lrh0 = IPS_LRH_BTH;
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/* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4. */
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qp->s_hdrwords = 6;
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hwords = 6;
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if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
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ipath_make_rc_grh(qp, &qp->remote_ah_attr.grh, 0);
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ohdr = &qp->s_hdr.u.l.oth;
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hwords += ipath_make_grh(dev, &hdr.u.l.grh,
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&qp->remote_ah_attr.grh,
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hwords, 0);
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ohdr = &hdr.u.l.oth;
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lrh0 = IPS_LRH_GRH;
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}
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bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
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@ -658,15 +530,14 @@ static void send_rc_ack(struct ipath_qp *qp)
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if (qp->s_ack_state >= OP(COMPARE_SWAP)) {
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bth0 |= IB_OPCODE_ATOMIC_ACKNOWLEDGE << 24;
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ohdr->u.at.atomic_ack_eth = cpu_to_be64(qp->s_ack_atomic);
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qp->s_hdrwords += sizeof(ohdr->u.at.atomic_ack_eth) / 4;
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}
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else
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hwords += sizeof(ohdr->u.at.atomic_ack_eth) / 4;
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} else
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bth0 |= OP(ACKNOWLEDGE) << 24;
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lrh0 |= qp->remote_ah_attr.sl << 4;
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qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
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qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
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qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + SIZE_OF_CRC);
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qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
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hdr.lrh[0] = cpu_to_be16(lrh0);
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hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
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hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
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hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
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ohdr->bth[0] = cpu_to_be32(bth0);
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ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
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ohdr->bth[2] = cpu_to_be32(qp->s_ack_psn & IPS_PSN_MASK);
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@ -674,8 +545,7 @@ static void send_rc_ack(struct ipath_qp *qp)
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/*
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* If we can send the ACK, clear the ACK state.
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*/
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if (ipath_verbs_send(dev->dd, qp->s_hdrwords, (u32 *) &qp->s_hdr,
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0, NULL) == 0) {
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if (ipath_verbs_send(dev->dd, hwords, (u32 *) &hdr, 0, NULL) == 0) {
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qp->s_ack_state = OP(ACKNOWLEDGE);
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dev->n_rc_qacks++;
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dev->n_unicast_xmit++;
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@ -805,7 +675,7 @@ bail:
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* @qp: the QP
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* @psn: the packet sequence number to restart at
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*
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* This is called from ipath_rc_rcv() to process an incoming RC ACK
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* This is called from ipath_rc_rcv_resp() to process an incoming RC ACK
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* for the given QP.
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* Called at interrupt level with the QP s_lock held.
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*/
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@ -1231,18 +1101,12 @@ static inline void ipath_rc_rcv_resp(struct ipath_ibdev *dev,
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* ICRC (4).
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*/
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if (unlikely(tlen <= (hdrsize + pad + 8))) {
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/*
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* XXX Need to generate an error CQ
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* entry.
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*/
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/* XXX Need to generate an error CQ entry. */
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goto ack_done;
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}
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tlen -= hdrsize + pad + 8;
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if (unlikely(tlen != qp->s_len)) {
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/*
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* XXX Need to generate an error CQ
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* entry.
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*/
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/* XXX Need to generate an error CQ entry. */
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goto ack_done;
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}
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if (!header_in_data)
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@ -1384,7 +1248,7 @@ static inline int ipath_rc_rcv_error(struct ipath_ibdev *dev,
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case OP(COMPARE_SWAP):
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case OP(FETCH_ADD):
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/*
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* Check for the PSN of the last atomic operations
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* Check for the PSN of the last atomic operation
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* performed and resend the result if found.
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*/
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if ((psn & IPS_PSN_MASK) != qp->r_atomic_psn) {
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@ -1454,11 +1318,6 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
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} else
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psn = be32_to_cpu(ohdr->bth[2]);
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}
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/*
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* The opcode is in the low byte when its in network order
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* (top byte when in host order).
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*/
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opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
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/*
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* Process responses (ACKs) before anything else. Note that the
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@ -1466,6 +1325,7 @@ void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
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* queue rather than the expected receive packet sequence number.
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* In other words, this QP is the requester.
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*/
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opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
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if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
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opcode <= OP(ATOMIC_ACKNOWLEDGE)) {
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ipath_rc_rcv_resp(dev, ohdr, data, tlen, qp, opcode, psn,
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@ -32,6 +32,7 @@
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*/
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#include "ipath_verbs.h"
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#include "ips_common.h"
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/*
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* Convert the AETH RNR timeout code into the number of milliseconds.
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@ -188,7 +189,6 @@ bail:
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/**
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* ipath_ruc_loopback - handle UC and RC lookback requests
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* @sqp: the loopback QP
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* @wc: the work completion entry
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*
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* This is called from ipath_do_uc_send() or ipath_do_rc_send() to
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* forward a WQE addressed to the same HCA.
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@ -197,13 +197,14 @@ bail:
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* receive interrupts since this is a connected protocol and all packets
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* will pass through here.
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*/
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void ipath_ruc_loopback(struct ipath_qp *sqp, struct ib_wc *wc)
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static void ipath_ruc_loopback(struct ipath_qp *sqp)
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{
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struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
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struct ipath_qp *qp;
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struct ipath_swqe *wqe;
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struct ipath_sge *sge;
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unsigned long flags;
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struct ib_wc wc;
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u64 sdata;
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qp = ipath_lookup_qpn(&dev->qp_table, sqp->remote_qpn);
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@ -234,8 +235,8 @@ again:
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wqe = get_swqe_ptr(sqp, sqp->s_last);
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spin_unlock_irqrestore(&sqp->s_lock, flags);
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wc->wc_flags = 0;
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wc->imm_data = 0;
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wc.wc_flags = 0;
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wc.imm_data = 0;
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sqp->s_sge.sge = wqe->sg_list[0];
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sqp->s_sge.sg_list = wqe->sg_list + 1;
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@ -243,8 +244,8 @@ again:
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sqp->s_len = wqe->length;
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switch (wqe->wr.opcode) {
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case IB_WR_SEND_WITH_IMM:
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wc->wc_flags = IB_WC_WITH_IMM;
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wc->imm_data = wqe->wr.imm_data;
|
||||
wc.wc_flags = IB_WC_WITH_IMM;
|
||||
wc.imm_data = wqe->wr.imm_data;
|
||||
/* FALLTHROUGH */
|
||||
case IB_WR_SEND:
|
||||
spin_lock_irqsave(&qp->r_rq.lock, flags);
|
||||
|
@ -255,7 +256,7 @@ again:
|
|||
if (qp->ibqp.qp_type == IB_QPT_UC)
|
||||
goto send_comp;
|
||||
if (sqp->s_rnr_retry == 0) {
|
||||
wc->status = IB_WC_RNR_RETRY_EXC_ERR;
|
||||
wc.status = IB_WC_RNR_RETRY_EXC_ERR;
|
||||
goto err;
|
||||
}
|
||||
if (sqp->s_rnr_retry_cnt < 7)
|
||||
|
@ -270,8 +271,8 @@ again:
|
|||
break;
|
||||
|
||||
case IB_WR_RDMA_WRITE_WITH_IMM:
|
||||
wc->wc_flags = IB_WC_WITH_IMM;
|
||||
wc->imm_data = wqe->wr.imm_data;
|
||||
wc.wc_flags = IB_WC_WITH_IMM;
|
||||
wc.imm_data = wqe->wr.imm_data;
|
||||
spin_lock_irqsave(&qp->r_rq.lock, flags);
|
||||
if (!ipath_get_rwqe(qp, 1))
|
||||
goto rnr_nak;
|
||||
|
@ -285,20 +286,20 @@ again:
|
|||
wqe->wr.wr.rdma.rkey,
|
||||
IB_ACCESS_REMOTE_WRITE))) {
|
||||
acc_err:
|
||||
wc->status = IB_WC_REM_ACCESS_ERR;
|
||||
wc.status = IB_WC_REM_ACCESS_ERR;
|
||||
err:
|
||||
wc->wr_id = wqe->wr.wr_id;
|
||||
wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
|
||||
wc->vendor_err = 0;
|
||||
wc->byte_len = 0;
|
||||
wc->qp_num = sqp->ibqp.qp_num;
|
||||
wc->src_qp = sqp->remote_qpn;
|
||||
wc->pkey_index = 0;
|
||||
wc->slid = sqp->remote_ah_attr.dlid;
|
||||
wc->sl = sqp->remote_ah_attr.sl;
|
||||
wc->dlid_path_bits = 0;
|
||||
wc->port_num = 0;
|
||||
ipath_sqerror_qp(sqp, wc);
|
||||
wc.wr_id = wqe->wr.wr_id;
|
||||
wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
|
||||
wc.vendor_err = 0;
|
||||
wc.byte_len = 0;
|
||||
wc.qp_num = sqp->ibqp.qp_num;
|
||||
wc.src_qp = sqp->remote_qpn;
|
||||
wc.pkey_index = 0;
|
||||
wc.slid = sqp->remote_ah_attr.dlid;
|
||||
wc.sl = sqp->remote_ah_attr.sl;
|
||||
wc.dlid_path_bits = 0;
|
||||
wc.port_num = 0;
|
||||
ipath_sqerror_qp(sqp, &wc);
|
||||
goto done;
|
||||
}
|
||||
break;
|
||||
|
@ -374,22 +375,22 @@ again:
|
|||
goto send_comp;
|
||||
|
||||
if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM)
|
||||
wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
|
||||
wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
|
||||
else
|
||||
wc->opcode = IB_WC_RECV;
|
||||
wc->wr_id = qp->r_wr_id;
|
||||
wc->status = IB_WC_SUCCESS;
|
||||
wc->vendor_err = 0;
|
||||
wc->byte_len = wqe->length;
|
||||
wc->qp_num = qp->ibqp.qp_num;
|
||||
wc->src_qp = qp->remote_qpn;
|
||||
wc.opcode = IB_WC_RECV;
|
||||
wc.wr_id = qp->r_wr_id;
|
||||
wc.status = IB_WC_SUCCESS;
|
||||
wc.vendor_err = 0;
|
||||
wc.byte_len = wqe->length;
|
||||
wc.qp_num = qp->ibqp.qp_num;
|
||||
wc.src_qp = qp->remote_qpn;
|
||||
/* XXX do we know which pkey matched? Only needed for GSI. */
|
||||
wc->pkey_index = 0;
|
||||
wc->slid = qp->remote_ah_attr.dlid;
|
||||
wc->sl = qp->remote_ah_attr.sl;
|
||||
wc->dlid_path_bits = 0;
|
||||
wc.pkey_index = 0;
|
||||
wc.slid = qp->remote_ah_attr.dlid;
|
||||
wc.sl = qp->remote_ah_attr.sl;
|
||||
wc.dlid_path_bits = 0;
|
||||
/* Signal completion event if the solicited bit is set. */
|
||||
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
|
||||
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
|
||||
wqe->wr.send_flags & IB_SEND_SOLICITED);
|
||||
|
||||
send_comp:
|
||||
|
@ -397,19 +398,19 @@ send_comp:
|
|||
|
||||
if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &sqp->s_flags) ||
|
||||
(wqe->wr.send_flags & IB_SEND_SIGNALED)) {
|
||||
wc->wr_id = wqe->wr.wr_id;
|
||||
wc->status = IB_WC_SUCCESS;
|
||||
wc->opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
|
||||
wc->vendor_err = 0;
|
||||
wc->byte_len = wqe->length;
|
||||
wc->qp_num = sqp->ibqp.qp_num;
|
||||
wc->src_qp = 0;
|
||||
wc->pkey_index = 0;
|
||||
wc->slid = 0;
|
||||
wc->sl = 0;
|
||||
wc->dlid_path_bits = 0;
|
||||
wc->port_num = 0;
|
||||
ipath_cq_enter(to_icq(sqp->ibqp.send_cq), wc, 0);
|
||||
wc.wr_id = wqe->wr.wr_id;
|
||||
wc.status = IB_WC_SUCCESS;
|
||||
wc.opcode = ib_ipath_wc_opcode[wqe->wr.opcode];
|
||||
wc.vendor_err = 0;
|
||||
wc.byte_len = wqe->length;
|
||||
wc.qp_num = sqp->ibqp.qp_num;
|
||||
wc.src_qp = 0;
|
||||
wc.pkey_index = 0;
|
||||
wc.slid = 0;
|
||||
wc.sl = 0;
|
||||
wc.dlid_path_bits = 0;
|
||||
wc.port_num = 0;
|
||||
ipath_cq_enter(to_icq(sqp->ibqp.send_cq), &wc, 0);
|
||||
}
|
||||
|
||||
/* Update s_last now that we are finished with the SWQE */
|
||||
|
@ -455,11 +456,11 @@ void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev)
|
|||
}
|
||||
|
||||
/**
|
||||
* ipath_post_rc_send - post RC and UC sends
|
||||
* ipath_post_ruc_send - post RC and UC sends
|
||||
* @qp: the QP to post on
|
||||
* @wr: the work request to send
|
||||
*/
|
||||
int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
|
||||
int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
|
||||
{
|
||||
struct ipath_swqe *wqe;
|
||||
unsigned long flags;
|
||||
|
@ -534,13 +535,149 @@ int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr)
|
|||
qp->s_head = next;
|
||||
spin_unlock_irqrestore(&qp->s_lock, flags);
|
||||
|
||||
if (qp->ibqp.qp_type == IB_QPT_UC)
|
||||
ipath_do_uc_send((unsigned long) qp);
|
||||
else
|
||||
ipath_do_rc_send((unsigned long) qp);
|
||||
ipath_do_ruc_send((unsigned long) qp);
|
||||
|
||||
ret = 0;
|
||||
|
||||
bail:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipath_make_grh - construct a GRH header
|
||||
* @dev: a pointer to the ipath device
|
||||
* @hdr: a pointer to the GRH header being constructed
|
||||
* @grh: the global route address to send to
|
||||
* @hwords: the number of 32 bit words of header being sent
|
||||
* @nwords: the number of 32 bit words of data being sent
|
||||
*
|
||||
* Return the size of the header in 32 bit words.
|
||||
*/
|
||||
u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
|
||||
struct ib_global_route *grh, u32 hwords, u32 nwords)
|
||||
{
|
||||
hdr->version_tclass_flow =
|
||||
cpu_to_be32((6 << 28) |
|
||||
(grh->traffic_class << 20) |
|
||||
grh->flow_label);
|
||||
hdr->paylen = cpu_to_be16((hwords - 2 + nwords + SIZE_OF_CRC) << 2);
|
||||
/* next_hdr is defined by C8-7 in ch. 8.4.1 */
|
||||
hdr->next_hdr = 0x1B;
|
||||
hdr->hop_limit = grh->hop_limit;
|
||||
/* The SGID is 32-bit aligned. */
|
||||
hdr->sgid.global.subnet_prefix = dev->gid_prefix;
|
||||
hdr->sgid.global.interface_id = ipath_layer_get_guid(dev->dd);
|
||||
hdr->dgid = grh->dgid;
|
||||
|
||||
/* GRH header size in 32-bit words. */
|
||||
return sizeof(struct ib_grh) / sizeof(u32);
|
||||
}
|
||||
|
||||
/**
|
||||
* ipath_do_ruc_send - perform a send on an RC or UC QP
|
||||
* @data: contains a pointer to the QP
|
||||
*
|
||||
* Process entries in the send work queue until credit or queue is
|
||||
* exhausted. Only allow one CPU to send a packet per QP (tasklet).
|
||||
* Otherwise, after we drop the QP s_lock, two threads could send
|
||||
* packets out of order.
|
||||
*/
|
||||
void ipath_do_ruc_send(unsigned long data)
|
||||
{
|
||||
struct ipath_qp *qp = (struct ipath_qp *)data;
|
||||
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
|
||||
unsigned long flags;
|
||||
u16 lrh0;
|
||||
u32 nwords;
|
||||
u32 extra_bytes;
|
||||
u32 bth0;
|
||||
u32 bth2;
|
||||
u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
|
||||
struct ipath_other_headers *ohdr;
|
||||
|
||||
if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags))
|
||||
goto bail;
|
||||
|
||||
if (unlikely(qp->remote_ah_attr.dlid ==
|
||||
ipath_layer_get_lid(dev->dd))) {
|
||||
ipath_ruc_loopback(qp);
|
||||
goto clear;
|
||||
}
|
||||
|
||||
ohdr = &qp->s_hdr.u.oth;
|
||||
if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
|
||||
ohdr = &qp->s_hdr.u.l.oth;
|
||||
|
||||
again:
|
||||
/* Check for a constructed packet to be sent. */
|
||||
if (qp->s_hdrwords != 0) {
|
||||
/*
|
||||
* If no PIO bufs are available, return. An interrupt will
|
||||
* call ipath_ib_piobufavail() when one is available.
|
||||
*/
|
||||
if (ipath_verbs_send(dev->dd, qp->s_hdrwords,
|
||||
(u32 *) &qp->s_hdr, qp->s_cur_size,
|
||||
qp->s_cur_sge)) {
|
||||
ipath_no_bufs_available(qp, dev);
|
||||
goto bail;
|
||||
}
|
||||
dev->n_unicast_xmit++;
|
||||
/* Record that we sent the packet and s_hdr is empty. */
|
||||
qp->s_hdrwords = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* The lock is needed to synchronize between setting
|
||||
* qp->s_ack_state, resend timer, and post_send().
|
||||
*/
|
||||
spin_lock_irqsave(&qp->s_lock, flags);
|
||||
|
||||
/* Sending responses has higher priority over sending requests. */
|
||||
if (qp->s_ack_state != IB_OPCODE_RC_ACKNOWLEDGE &&
|
||||
(bth0 = ipath_make_rc_ack(qp, ohdr, pmtu)) != 0)
|
||||
bth2 = qp->s_ack_psn++ & IPS_PSN_MASK;
|
||||
else if (!((qp->ibqp.qp_type == IB_QPT_RC) ?
|
||||
ipath_make_rc_req(qp, ohdr, pmtu, &bth0, &bth2) :
|
||||
ipath_make_uc_req(qp, ohdr, pmtu, &bth0, &bth2))) {
|
||||
/*
|
||||
* Clear the busy bit before unlocking to avoid races with
|
||||
* adding new work queue items and then failing to process
|
||||
* them.
|
||||
*/
|
||||
clear_bit(IPATH_S_BUSY, &qp->s_flags);
|
||||
spin_unlock_irqrestore(&qp->s_lock, flags);
|
||||
goto bail;
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&qp->s_lock, flags);
|
||||
|
||||
/* Construct the header. */
|
||||
extra_bytes = (4 - qp->s_cur_size) & 3;
|
||||
nwords = (qp->s_cur_size + extra_bytes) >> 2;
|
||||
lrh0 = IPS_LRH_BTH;
|
||||
if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
|
||||
qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh,
|
||||
&qp->remote_ah_attr.grh,
|
||||
qp->s_hdrwords, nwords);
|
||||
lrh0 = IPS_LRH_GRH;
|
||||
}
|
||||
lrh0 |= qp->remote_ah_attr.sl << 4;
|
||||
qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
|
||||
qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
|
||||
qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords +
|
||||
SIZE_OF_CRC);
|
||||
qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
|
||||
bth0 |= ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
|
||||
bth0 |= extra_bytes << 20;
|
||||
ohdr->bth[0] = cpu_to_be32(bth0);
|
||||
ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
|
||||
ohdr->bth[2] = cpu_to_be32(bth2);
|
||||
|
||||
/* Check for more work to do. */
|
||||
goto again;
|
||||
|
||||
clear:
|
||||
clear_bit(IPATH_S_BUSY, &qp->s_flags);
|
||||
bail:
|
||||
return;
|
||||
}
|
||||
|
|
|
@ -62,90 +62,40 @@ static void complete_last_send(struct ipath_qp *qp, struct ipath_swqe *wqe,
|
|||
}
|
||||
|
||||
/**
|
||||
* ipath_do_uc_send - do a send on a UC queue
|
||||
* @data: contains a pointer to the QP to send on
|
||||
* ipath_make_uc_req - construct a request packet (SEND, RDMA write)
|
||||
* @qp: a pointer to the QP
|
||||
* @ohdr: a pointer to the IB header being constructed
|
||||
* @pmtu: the path MTU
|
||||
* @bth0p: pointer to the BTH opcode word
|
||||
* @bth2p: pointer to the BTH PSN word
|
||||
*
|
||||
* Process entries in the send work queue until the queue is exhausted.
|
||||
* Only allow one CPU to send a packet per QP (tasklet).
|
||||
* Otherwise, after we drop the QP lock, two threads could send
|
||||
* packets out of order.
|
||||
* This is similar to ipath_do_rc_send() below except we don't have
|
||||
* timeouts or resends.
|
||||
* Return 1 if constructed; otherwise, return 0.
|
||||
* Note the QP s_lock must be held and interrupts disabled.
|
||||
*/
|
||||
void ipath_do_uc_send(unsigned long data)
|
||||
int ipath_make_uc_req(struct ipath_qp *qp,
|
||||
struct ipath_other_headers *ohdr,
|
||||
u32 pmtu, u32 *bth0p, u32 *bth2p)
|
||||
{
|
||||
struct ipath_qp *qp = (struct ipath_qp *)data;
|
||||
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
|
||||
struct ipath_swqe *wqe;
|
||||
unsigned long flags;
|
||||
u16 lrh0;
|
||||
u32 hwords;
|
||||
u32 nwords;
|
||||
u32 extra_bytes;
|
||||
u32 bth0;
|
||||
u32 bth2;
|
||||
u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
|
||||
u32 len;
|
||||
struct ipath_other_headers *ohdr;
|
||||
struct ib_wc wc;
|
||||
|
||||
if (test_and_set_bit(IPATH_S_BUSY, &qp->s_flags))
|
||||
goto bail;
|
||||
|
||||
if (unlikely(qp->remote_ah_attr.dlid ==
|
||||
ipath_layer_get_lid(dev->dd))) {
|
||||
/* Pass in an uninitialized ib_wc to save stack space. */
|
||||
ipath_ruc_loopback(qp, &wc);
|
||||
clear_bit(IPATH_S_BUSY, &qp->s_flags);
|
||||
goto bail;
|
||||
}
|
||||
|
||||
ohdr = &qp->s_hdr.u.oth;
|
||||
if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
|
||||
ohdr = &qp->s_hdr.u.l.oth;
|
||||
|
||||
again:
|
||||
/* Check for a constructed packet to be sent. */
|
||||
if (qp->s_hdrwords != 0) {
|
||||
/*
|
||||
* If no PIO bufs are available, return.
|
||||
* An interrupt will call ipath_ib_piobufavail()
|
||||
* when one is available.
|
||||
*/
|
||||
if (ipath_verbs_send(dev->dd, qp->s_hdrwords,
|
||||
(u32 *) &qp->s_hdr,
|
||||
qp->s_cur_size,
|
||||
qp->s_cur_sge)) {
|
||||
ipath_no_bufs_available(qp, dev);
|
||||
goto bail;
|
||||
}
|
||||
dev->n_unicast_xmit++;
|
||||
/* Record that we sent the packet and s_hdr is empty. */
|
||||
qp->s_hdrwords = 0;
|
||||
}
|
||||
|
||||
lrh0 = IPS_LRH_BTH;
|
||||
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
|
||||
hwords = 5;
|
||||
|
||||
/*
|
||||
* The lock is needed to synchronize between
|
||||
* setting qp->s_ack_state and post_send().
|
||||
*/
|
||||
spin_lock_irqsave(&qp->s_lock, flags);
|
||||
|
||||
if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK))
|
||||
goto done;
|
||||
|
||||
bth0 = ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
|
||||
/* header size in 32-bit words LRH+BTH = (8+12)/4. */
|
||||
hwords = 5;
|
||||
bth0 = 0;
|
||||
|
||||
/* Send a request. */
|
||||
/* Get the next send request. */
|
||||
wqe = get_swqe_ptr(qp, qp->s_last);
|
||||
switch (qp->s_state) {
|
||||
default:
|
||||
/*
|
||||
* Signal the completion of the last send (if there is
|
||||
* one).
|
||||
* Signal the completion of the last send
|
||||
* (if there is one).
|
||||
*/
|
||||
if (qp->s_last != qp->s_tail)
|
||||
complete_last_send(qp, wqe, &wc);
|
||||
|
@ -258,61 +208,16 @@ again:
|
|||
}
|
||||
break;
|
||||
}
|
||||
bth2 = qp->s_next_psn++ & IPS_PSN_MASK;
|
||||
qp->s_len -= len;
|
||||
bth0 |= qp->s_state << 24;
|
||||
|
||||
spin_unlock_irqrestore(&qp->s_lock, flags);
|
||||
|
||||
/* Construct the header. */
|
||||
extra_bytes = (4 - len) & 3;
|
||||
nwords = (len + extra_bytes) >> 2;
|
||||
if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
|
||||
/* Header size in 32-bit words. */
|
||||
hwords += 10;
|
||||
lrh0 = IPS_LRH_GRH;
|
||||
qp->s_hdr.u.l.grh.version_tclass_flow =
|
||||
cpu_to_be32((6 << 28) |
|
||||
(qp->remote_ah_attr.grh.traffic_class
|
||||
<< 20) |
|
||||
qp->remote_ah_attr.grh.flow_label);
|
||||
qp->s_hdr.u.l.grh.paylen =
|
||||
cpu_to_be16(((hwords - 12) + nwords +
|
||||
SIZE_OF_CRC) << 2);
|
||||
/* next_hdr is defined by C8-7 in ch. 8.4.1 */
|
||||
qp->s_hdr.u.l.grh.next_hdr = 0x1B;
|
||||
qp->s_hdr.u.l.grh.hop_limit =
|
||||
qp->remote_ah_attr.grh.hop_limit;
|
||||
/* The SGID is 32-bit aligned. */
|
||||
qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
|
||||
dev->gid_prefix;
|
||||
qp->s_hdr.u.l.grh.sgid.global.interface_id =
|
||||
ipath_layer_get_guid(dev->dd);
|
||||
qp->s_hdr.u.l.grh.dgid = qp->remote_ah_attr.grh.dgid;
|
||||
}
|
||||
qp->s_hdrwords = hwords;
|
||||
qp->s_cur_sge = &qp->s_sge;
|
||||
qp->s_cur_size = len;
|
||||
lrh0 |= qp->remote_ah_attr.sl << 4;
|
||||
qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
|
||||
/* DEST LID */
|
||||
qp->s_hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
|
||||
qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
|
||||
qp->s_hdr.lrh[3] = cpu_to_be16(ipath_layer_get_lid(dev->dd));
|
||||
bth0 |= extra_bytes << 20;
|
||||
ohdr->bth[0] = cpu_to_be32(bth0);
|
||||
ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
|
||||
ohdr->bth[2] = cpu_to_be32(bth2);
|
||||
|
||||
/* Check for more work to do. */
|
||||
goto again;
|
||||
*bth0p = bth0 | (qp->s_state << 24);
|
||||
*bth2p = qp->s_next_psn++ & IPS_PSN_MASK;
|
||||
return 1;
|
||||
|
||||
done:
|
||||
spin_unlock_irqrestore(&qp->s_lock, flags);
|
||||
clear_bit(IPATH_S_BUSY, &qp->s_flags);
|
||||
|
||||
bail:
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -536,12 +441,13 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
|
|||
if (qp->r_len != 0) {
|
||||
u32 rkey = be32_to_cpu(reth->rkey);
|
||||
u64 vaddr = be64_to_cpu(reth->vaddr);
|
||||
int ok;
|
||||
|
||||
/* Check rkey */
|
||||
if (unlikely(!ipath_rkey_ok(
|
||||
dev, &qp->r_sge, qp->r_len,
|
||||
vaddr, rkey,
|
||||
IB_ACCESS_REMOTE_WRITE))) {
|
||||
ok = ipath_rkey_ok(dev, &qp->r_sge, qp->r_len,
|
||||
vaddr, rkey,
|
||||
IB_ACCESS_REMOTE_WRITE);
|
||||
if (unlikely(!ok)) {
|
||||
dev->n_pkt_drops++;
|
||||
goto done;
|
||||
}
|
||||
|
@ -559,8 +465,7 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
|
|||
}
|
||||
if (opcode == OP(RDMA_WRITE_ONLY))
|
||||
goto rdma_last;
|
||||
else if (opcode ==
|
||||
OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE))
|
||||
else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE))
|
||||
goto rdma_last_imm;
|
||||
/* FALLTHROUGH */
|
||||
case OP(RDMA_WRITE_MIDDLE):
|
||||
|
@ -593,9 +498,9 @@ void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
|
|||
dev->n_pkt_drops++;
|
||||
goto done;
|
||||
}
|
||||
if (qp->r_reuse_sge) {
|
||||
if (qp->r_reuse_sge)
|
||||
qp->r_reuse_sge = 0;
|
||||
} else if (!ipath_get_rwqe(qp, 1)) {
|
||||
else if (!ipath_get_rwqe(qp, 1)) {
|
||||
dev->n_pkt_drops++;
|
||||
goto done;
|
||||
}
|
||||
|
|
|
@ -194,7 +194,7 @@ static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
|
|||
switch (qp->ibqp.qp_type) {
|
||||
case IB_QPT_UC:
|
||||
case IB_QPT_RC:
|
||||
err = ipath_post_rc_send(qp, wr);
|
||||
err = ipath_post_ruc_send(qp, wr);
|
||||
break;
|
||||
|
||||
case IB_QPT_SMI:
|
||||
|
|
|
@ -581,10 +581,6 @@ void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc);
|
|||
|
||||
void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
|
||||
|
||||
void ipath_do_rc_send(unsigned long data);
|
||||
|
||||
void ipath_do_uc_send(unsigned long data);
|
||||
|
||||
void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
|
||||
|
||||
int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
|
||||
|
@ -597,7 +593,7 @@ void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);
|
|||
|
||||
void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
|
||||
|
||||
int ipath_post_rc_send(struct ipath_qp *qp, struct ib_send_wr *wr);
|
||||
int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr);
|
||||
|
||||
void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
|
||||
int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
|
||||
|
@ -679,7 +675,19 @@ void ipath_insert_rnr_queue(struct ipath_qp *qp);
|
|||
|
||||
int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
|
||||
|
||||
void ipath_ruc_loopback(struct ipath_qp *sqp, struct ib_wc *wc);
|
||||
u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
|
||||
struct ib_global_route *grh, u32 hwords, u32 nwords);
|
||||
|
||||
void ipath_do_ruc_send(unsigned long data);
|
||||
|
||||
u32 ipath_make_rc_ack(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
|
||||
u32 pmtu);
|
||||
|
||||
int ipath_make_rc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
|
||||
u32 pmtu, u32 *bth0p, u32 *bth2p);
|
||||
|
||||
int ipath_make_uc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
|
||||
u32 pmtu, u32 *bth0p, u32 *bth2p);
|
||||
|
||||
extern const enum ib_wc_opcode ib_ipath_wc_opcode[];
|
||||
|
||||
|
|
Loading…
Reference in a new issue