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Diffstat (limited to 'drivers/infiniband/hw/qib/qib_ruc.c')
-rw-r--r--drivers/infiniband/hw/qib/qib_ruc.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/drivers/infiniband/hw/qib/qib_ruc.c b/drivers/infiniband/hw/qib/qib_ruc.c
deleted file mode 100644
index 1fa21938f310..000000000000
--- a/drivers/infiniband/hw/qib/qib_ruc.c
+++ /dev/null
@@ -1,314 +0,0 @@
-/*
- * Copyright (c) 2006, 2007, 2008, 2009 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/spinlock.h>
-#include <rdma/ib_smi.h>
-
-#include "qib.h"
-#include "qib_mad.h"
-
-/*
- * Switch to alternate path.
- * The QP s_lock should be held and interrupts disabled.
- */
-void qib_migrate_qp(struct rvt_qp *qp)
-{
- struct ib_event ev;
-
- qp->s_mig_state = IB_MIG_MIGRATED;
- qp->remote_ah_attr = qp->alt_ah_attr;
- qp->port_num = rdma_ah_get_port_num(&qp->alt_ah_attr);
- qp->s_pkey_index = qp->s_alt_pkey_index;
-
- ev.device = qp->ibqp.device;
- ev.element.qp = &qp->ibqp;
- ev.event = IB_EVENT_PATH_MIG;
- qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
-}
-
-static __be64 get_sguid(struct qib_ibport *ibp, unsigned index)
-{
- if (!index) {
- struct qib_pportdata *ppd = ppd_from_ibp(ibp);
-
- return ppd->guid;
- }
- return ibp->guids[index - 1];
-}
-
-static int gid_ok(union ib_gid *gid, __be64 gid_prefix, __be64 id)
-{
- return (gid->global.interface_id == id &&
- (gid->global.subnet_prefix == gid_prefix ||
- gid->global.subnet_prefix == IB_DEFAULT_GID_PREFIX));
-}
-
-/*
- *
- * This should be called with the QP r_lock held.
- *
- * The s_lock will be acquired around the qib_migrate_qp() call.
- */
-int qib_ruc_check_hdr(struct qib_ibport *ibp, struct ib_header *hdr,
- int has_grh, struct rvt_qp *qp, u32 bth0)
-{
- __be64 guid;
- unsigned long flags;
-
- if (qp->s_mig_state == IB_MIG_ARMED && (bth0 & IB_BTH_MIG_REQ)) {
- if (!has_grh) {
- if (rdma_ah_get_ah_flags(&qp->alt_ah_attr) &
- IB_AH_GRH)
- goto err;
- } else {
- const struct ib_global_route *grh;
-
- if (!(rdma_ah_get_ah_flags(&qp->alt_ah_attr) &
- IB_AH_GRH))
- goto err;
- grh = rdma_ah_read_grh(&qp->alt_ah_attr);
- guid = get_sguid(ibp, grh->sgid_index);
- if (!gid_ok(&hdr->u.l.grh.dgid,
- ibp->rvp.gid_prefix, guid))
- goto err;
- if (!gid_ok(&hdr->u.l.grh.sgid,
- grh->dgid.global.subnet_prefix,
- grh->dgid.global.interface_id))
- goto err;
- }
- if (!qib_pkey_ok((u16)bth0,
- qib_get_pkey(ibp, qp->s_alt_pkey_index))) {
- qib_bad_pkey(ibp,
- (u16)bth0,
- (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
- 0, qp->ibqp.qp_num,
- hdr->lrh[3], hdr->lrh[1]);
- goto err;
- }
- /* Validate the SLID. See Ch. 9.6.1.5 and 17.2.8 */
- if ((be16_to_cpu(hdr->lrh[3]) !=
- rdma_ah_get_dlid(&qp->alt_ah_attr)) ||
- ppd_from_ibp(ibp)->port !=
- rdma_ah_get_port_num(&qp->alt_ah_attr))
- goto err;
- spin_lock_irqsave(&qp->s_lock, flags);
- qib_migrate_qp(qp);
- spin_unlock_irqrestore(&qp->s_lock, flags);
- } else {
- if (!has_grh) {
- if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) &
- IB_AH_GRH)
- goto err;
- } else {
- const struct ib_global_route *grh;
-
- if (!(rdma_ah_get_ah_flags(&qp->remote_ah_attr) &
- IB_AH_GRH))
- goto err;
- grh = rdma_ah_read_grh(&qp->remote_ah_attr);
- guid = get_sguid(ibp, grh->sgid_index);
- if (!gid_ok(&hdr->u.l.grh.dgid,
- ibp->rvp.gid_prefix, guid))
- goto err;
- if (!gid_ok(&hdr->u.l.grh.sgid,
- grh->dgid.global.subnet_prefix,
- grh->dgid.global.interface_id))
- goto err;
- }
- if (!qib_pkey_ok((u16)bth0,
- qib_get_pkey(ibp, qp->s_pkey_index))) {
- qib_bad_pkey(ibp,
- (u16)bth0,
- (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
- 0, qp->ibqp.qp_num,
- hdr->lrh[3], hdr->lrh[1]);
- goto err;
- }
- /* Validate the SLID. See Ch. 9.6.1.5 */
- if (be16_to_cpu(hdr->lrh[3]) !=
- rdma_ah_get_dlid(&qp->remote_ah_attr) ||
- ppd_from_ibp(ibp)->port != qp->port_num)
- goto err;
- if (qp->s_mig_state == IB_MIG_REARM &&
- !(bth0 & IB_BTH_MIG_REQ))
- qp->s_mig_state = IB_MIG_ARMED;
- }
-
- return 0;
-
-err:
- return 1;
-}
-
-/**
- * qib_make_grh - construct a GRH header
- * @ibp: a pointer to the IB port
- * @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 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
- const struct ib_global_route *grh, u32 hwords, u32 nwords)
-{
- hdr->version_tclass_flow =
- cpu_to_be32((IB_GRH_VERSION << IB_GRH_VERSION_SHIFT) |
- (grh->traffic_class << IB_GRH_TCLASS_SHIFT) |
- (grh->flow_label << IB_GRH_FLOW_SHIFT));
- 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 = IB_GRH_NEXT_HDR;
- hdr->hop_limit = grh->hop_limit;
- /* The SGID is 32-bit aligned. */
- hdr->sgid.global.subnet_prefix = ibp->rvp.gid_prefix;
- if (!grh->sgid_index)
- hdr->sgid.global.interface_id = ppd_from_ibp(ibp)->guid;
- else if (grh->sgid_index < QIB_GUIDS_PER_PORT)
- hdr->sgid.global.interface_id = ibp->guids[grh->sgid_index - 1];
- hdr->dgid = grh->dgid;
-
- /* GRH header size in 32-bit words. */
- return sizeof(struct ib_grh) / sizeof(u32);
-}
-
-void qib_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
- u32 bth0, u32 bth2)
-{
- struct qib_qp_priv *priv = qp->priv;
- struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
- u16 lrh0;
- u32 nwords;
- u32 extra_bytes;
-
- /* Construct the header. */
- extra_bytes = -qp->s_cur_size & 3;
- nwords = (qp->s_cur_size + extra_bytes) >> 2;
- lrh0 = QIB_LRH_BTH;
- if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) {
- qp->s_hdrwords +=
- qib_make_grh(ibp, &priv->s_hdr->u.l.grh,
- rdma_ah_read_grh(&qp->remote_ah_attr),
- qp->s_hdrwords, nwords);
- lrh0 = QIB_LRH_GRH;
- }
- lrh0 |= ibp->sl_to_vl[rdma_ah_get_sl(&qp->remote_ah_attr)] << 12 |
- rdma_ah_get_sl(&qp->remote_ah_attr) << 4;
- priv->s_hdr->lrh[0] = cpu_to_be16(lrh0);
- priv->s_hdr->lrh[1] =
- cpu_to_be16(rdma_ah_get_dlid(&qp->remote_ah_attr));
- priv->s_hdr->lrh[2] =
- cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
- priv->s_hdr->lrh[3] =
- cpu_to_be16(ppd_from_ibp(ibp)->lid |
- rdma_ah_get_path_bits(&qp->remote_ah_attr));
- bth0 |= qib_get_pkey(ibp, qp->s_pkey_index);
- bth0 |= extra_bytes << 20;
- if (qp->s_mig_state == IB_MIG_MIGRATED)
- bth0 |= IB_BTH_MIG_REQ;
- ohdr->bth[0] = cpu_to_be32(bth0);
- ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
- ohdr->bth[2] = cpu_to_be32(bth2);
- this_cpu_inc(ibp->pmastats->n_unicast_xmit);
-}
-
-void _qib_do_send(struct work_struct *work)
-{
- struct qib_qp_priv *priv = container_of(work, struct qib_qp_priv,
- s_work);
- struct rvt_qp *qp = priv->owner;
-
- qib_do_send(qp);
-}
-
-/**
- * qib_do_send - perform a send on a QP
- * @qp: 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, two threads could send packets out of order.
- */
-void qib_do_send(struct rvt_qp *qp)
-{
- struct qib_qp_priv *priv = qp->priv;
- struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
- struct qib_pportdata *ppd = ppd_from_ibp(ibp);
- int (*make_req)(struct rvt_qp *qp, unsigned long *flags);
- unsigned long flags;
-
- if ((qp->ibqp.qp_type == IB_QPT_RC ||
- qp->ibqp.qp_type == IB_QPT_UC) &&
- (rdma_ah_get_dlid(&qp->remote_ah_attr) &
- ~((1 << ppd->lmc) - 1)) == ppd->lid) {
- rvt_ruc_loopback(qp);
- return;
- }
-
- if (qp->ibqp.qp_type == IB_QPT_RC)
- make_req = qib_make_rc_req;
- else if (qp->ibqp.qp_type == IB_QPT_UC)
- make_req = qib_make_uc_req;
- else
- make_req = qib_make_ud_req;
-
- spin_lock_irqsave(&qp->s_lock, flags);
-
- /* Return if we are already busy processing a work request. */
- if (!qib_send_ok(qp)) {
- spin_unlock_irqrestore(&qp->s_lock, flags);
- return;
- }
-
- qp->s_flags |= RVT_S_BUSY;
-
- do {
- /* Check for a constructed packet to be sent. */
- if (qp->s_hdrwords != 0) {
- spin_unlock_irqrestore(&qp->s_lock, flags);
- /*
- * If the packet cannot be sent now, return and
- * the send tasklet will be woken up later.
- */
- if (qib_verbs_send(qp, priv->s_hdr, qp->s_hdrwords,
- qp->s_cur_sge, qp->s_cur_size))
- return;
- /* Record that s_hdr is empty. */
- qp->s_hdrwords = 0;
- spin_lock_irqsave(&qp->s_lock, flags);
- }
- } while (make_req(qp, &flags));
-
- spin_unlock_irqrestore(&qp->s_lock, flags);
-}
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