ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/infiniband/hw/qib/qib_ruc.c b/marvell/linux/drivers/infiniband/hw/qib/qib_ruc.c
new file mode 100644
index 0000000..1fa2193
--- /dev/null
+++ b/marvell/linux/drivers/infiniband/hw/qib/qib_ruc.c
@@ -0,0 +1,314 @@
+/*
+ * 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);
+}