2da3897d01
kernel programming interface module, KPI, to avoid confusion with the existing Linux userspace binary compatibility shims. Bump the FreeBSD_version number. Reviewed by: np @ Suggested by: dumbbell @ Sponsored by: Mellanox Technologies
368 lines
8.2 KiB
C
368 lines
8.2 KiB
C
/*
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* Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include <sys/ktr.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <rdma/ib_verbs.h>
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#include <linux/idr.h>
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#ifdef TCP_OFFLOAD
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#include "iw_cxgbe.h"
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int spg_creds = 2; /* Default status page size is 2 credits = 128B */
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void
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c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
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struct c4iw_dev_ucontext *uctx)
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{
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struct list_head *pos, *nxt;
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struct c4iw_qid_list *entry;
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mutex_lock(&uctx->lock);
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list_for_each_safe(pos, nxt, &uctx->qpids) {
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entry = list_entry(pos, struct c4iw_qid_list, entry);
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list_del_init(&entry->entry);
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if (!(entry->qid & rdev->qpmask)) {
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c4iw_put_resource(&rdev->resource.qid_table,
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entry->qid);
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mutex_lock(&rdev->stats.lock);
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rdev->stats.qid.cur -= rdev->qpmask + 1;
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mutex_unlock(&rdev->stats.lock);
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}
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kfree(entry);
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}
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list_for_each_safe(pos, nxt, &uctx->qpids) {
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entry = list_entry(pos, struct c4iw_qid_list, entry);
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list_del_init(&entry->entry);
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kfree(entry);
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}
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mutex_unlock(&uctx->lock);
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}
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void
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c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
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{
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INIT_LIST_HEAD(&uctx->qpids);
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INIT_LIST_HEAD(&uctx->cqids);
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mutex_init(&uctx->lock);
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}
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static int
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c4iw_rdev_open(struct c4iw_rdev *rdev)
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{
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struct adapter *sc = rdev->adap;
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int rc;
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c4iw_init_dev_ucontext(rdev, &rdev->uctx);
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/* Save the status page size set by if_cxgbe */
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spg_creds = (t4_read_reg(sc, A_SGE_CONTROL) & F_EGRSTATUSPAGESIZE) ?
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2 : 1;
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/* XXX: we can probably make this work */
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if (sc->sge.eq_s_qpp > PAGE_SHIFT || sc->sge.iq_s_qpp > PAGE_SHIFT) {
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device_printf(sc->dev,
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"doorbell density too high (eq %d, iq %d, pg %d).\n",
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sc->sge.eq_s_qpp, sc->sge.eq_s_qpp, PAGE_SHIFT);
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rc = -EINVAL;
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goto err1;
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}
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rdev->qpshift = PAGE_SHIFT - sc->sge.eq_s_qpp;
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rdev->qpmask = (1 << sc->sge.eq_s_qpp) - 1;
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rdev->cqshift = PAGE_SHIFT - sc->sge.iq_s_qpp;
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rdev->cqmask = (1 << sc->sge.iq_s_qpp) - 1;
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if (c4iw_num_stags(rdev) == 0) {
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rc = -EINVAL;
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goto err1;
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}
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rdev->stats.pd.total = T4_MAX_NUM_PD;
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rdev->stats.stag.total = sc->vres.stag.size;
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rdev->stats.pbl.total = sc->vres.pbl.size;
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rdev->stats.rqt.total = sc->vres.rq.size;
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rdev->stats.qid.total = sc->vres.qp.size;
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rc = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
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if (rc) {
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device_printf(sc->dev, "error %d initializing resources\n", rc);
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goto err1;
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}
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rc = c4iw_pblpool_create(rdev);
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if (rc) {
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device_printf(sc->dev, "error %d initializing pbl pool\n", rc);
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goto err2;
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}
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rc = c4iw_rqtpool_create(rdev);
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if (rc) {
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device_printf(sc->dev, "error %d initializing rqt pool\n", rc);
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goto err3;
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}
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return (0);
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err3:
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c4iw_pblpool_destroy(rdev);
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err2:
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c4iw_destroy_resource(&rdev->resource);
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err1:
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return (rc);
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}
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static void c4iw_rdev_close(struct c4iw_rdev *rdev)
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{
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c4iw_pblpool_destroy(rdev);
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c4iw_rqtpool_destroy(rdev);
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c4iw_destroy_resource(&rdev->resource);
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}
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static void
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c4iw_dealloc(struct c4iw_dev *iwsc)
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{
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c4iw_rdev_close(&iwsc->rdev);
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idr_destroy(&iwsc->cqidr);
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idr_destroy(&iwsc->qpidr);
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idr_destroy(&iwsc->mmidr);
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ib_dealloc_device(&iwsc->ibdev);
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}
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static struct c4iw_dev *
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c4iw_alloc(struct adapter *sc)
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{
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struct c4iw_dev *iwsc;
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int rc;
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iwsc = (struct c4iw_dev *)ib_alloc_device(sizeof(*iwsc));
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if (iwsc == NULL) {
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device_printf(sc->dev, "Cannot allocate ib device.\n");
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return (ERR_PTR(-ENOMEM));
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}
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iwsc->rdev.adap = sc;
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rc = c4iw_rdev_open(&iwsc->rdev);
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if (rc != 0) {
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device_printf(sc->dev, "Unable to open CXIO rdev (%d)\n", rc);
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ib_dealloc_device(&iwsc->ibdev);
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return (ERR_PTR(rc));
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}
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idr_init(&iwsc->cqidr);
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idr_init(&iwsc->qpidr);
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idr_init(&iwsc->mmidr);
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spin_lock_init(&iwsc->lock);
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mutex_init(&iwsc->rdev.stats.lock);
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return (iwsc);
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}
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static int c4iw_mod_load(void);
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static int c4iw_mod_unload(void);
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static int c4iw_activate(struct adapter *);
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static int c4iw_deactivate(struct adapter *);
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static struct uld_info c4iw_uld_info = {
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.uld_id = ULD_IWARP,
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.activate = c4iw_activate,
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.deactivate = c4iw_deactivate,
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};
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static int
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c4iw_activate(struct adapter *sc)
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{
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struct c4iw_dev *iwsc;
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int rc;
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ASSERT_SYNCHRONIZED_OP(sc);
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if (uld_active(sc, ULD_IWARP)) {
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KASSERT(0, ("%s: RDMA already eanbled on sc %p", __func__, sc));
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return (0);
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}
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if (sc->rdmacaps == 0) {
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device_printf(sc->dev,
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"RDMA not supported or RDMA cap is not enabled.\n");
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return (ENOSYS);
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}
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iwsc = c4iw_alloc(sc);
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if (IS_ERR(iwsc)) {
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rc = -PTR_ERR(iwsc);
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device_printf(sc->dev, "initialization failed: %d\n", rc);
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return (rc);
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}
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sc->iwarp_softc = iwsc;
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c4iw_cm_init_cpl(sc);
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rc = -c4iw_register_device(iwsc);
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if (rc) {
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device_printf(sc->dev, "RDMA registration failed: %d\n", rc);
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c4iw_dealloc(iwsc);
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sc->iwarp_softc = NULL;
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}
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return (rc);
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}
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static int
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c4iw_deactivate(struct adapter *sc)
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{
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struct c4iw_dev *iwsc = sc->iwarp_softc;
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ASSERT_SYNCHRONIZED_OP(sc);
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c4iw_unregister_device(iwsc);
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c4iw_dealloc(iwsc);
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sc->iwarp_softc = NULL;
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return (0);
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}
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static void
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c4iw_activate_all(struct adapter *sc, void *arg __unused)
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{
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if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwact") != 0)
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return;
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/* Activate iWARP if any port on this adapter has IFCAP_TOE enabled. */
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if (sc->offload_map && !uld_active(sc, ULD_IWARP))
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(void) t4_activate_uld(sc, ULD_IWARP);
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end_synchronized_op(sc, 0);
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}
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static void
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c4iw_deactivate_all(struct adapter *sc, void *arg __unused)
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{
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if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwdea") != 0)
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return;
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if (uld_active(sc, ULD_IWARP))
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(void) t4_deactivate_uld(sc, ULD_IWARP);
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end_synchronized_op(sc, 0);
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}
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static int
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c4iw_mod_load(void)
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{
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int rc;
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rc = -c4iw_cm_init();
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if (rc != 0)
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return (rc);
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rc = t4_register_uld(&c4iw_uld_info);
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if (rc != 0) {
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c4iw_cm_term();
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return (rc);
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}
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t4_iterate(c4iw_activate_all, NULL);
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return (rc);
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}
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static int
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c4iw_mod_unload(void)
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{
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t4_iterate(c4iw_deactivate_all, NULL);
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c4iw_cm_term();
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if (t4_unregister_uld(&c4iw_uld_info) == EBUSY)
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return (EBUSY);
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return (0);
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}
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#endif
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/*
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* t4_tom won't load on kernels without TCP_OFFLOAD and this module's dependency
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* on t4_tom ensures that it won't either. So we don't directly check for
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* TCP_OFFLOAD here.
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*/
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static int
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c4iw_modevent(module_t mod, int cmd, void *arg)
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{
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int rc = 0;
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#ifdef TCP_OFFLOAD
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switch (cmd) {
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case MOD_LOAD:
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rc = c4iw_mod_load();
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if (rc == 0)
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printf("iw_cxgbe: Chelsio T4/T5 RDMA driver loaded.\n");
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break;
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case MOD_UNLOAD:
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rc = c4iw_mod_unload();
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break;
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default:
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rc = EINVAL;
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}
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#else
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printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
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rc = EOPNOTSUPP;
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#endif
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return (rc);
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}
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static moduledata_t c4iw_mod_data = {
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"iw_cxgbe",
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c4iw_modevent,
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0
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};
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MODULE_VERSION(iw_cxgbe, 1);
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MODULE_DEPEND(iw_cxgbe, t4nex, 1, 1, 1);
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MODULE_DEPEND(iw_cxgbe, t4_tom, 1, 1, 1);
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MODULE_DEPEND(iw_cxgbe, ibcore, 1, 1, 1);
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MODULE_DEPEND(iw_cxgbe, linuxkpi, 1, 1, 1);
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DECLARE_MODULE(iw_cxgbe, c4iw_mod_data, SI_SUB_EXEC, SI_ORDER_ANY);
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