/* * Copyright (c) 2009-2013 Chelsio, 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 __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include #include #include #include #include #ifdef TCP_OFFLOAD #include "iw_cxgbe.h" int spg_creds = 2; /* Default status page size is 2 credits = 128B */ void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx) { struct list_head *pos, *nxt; struct c4iw_qid_list *entry; mutex_lock(&uctx->lock); list_for_each_safe(pos, nxt, &uctx->qpids) { entry = list_entry(pos, struct c4iw_qid_list, entry); list_del_init(&entry->entry); if (!(entry->qid & rdev->qpmask)) { c4iw_put_resource(&rdev->resource.qid_table, entry->qid); mutex_lock(&rdev->stats.lock); rdev->stats.qid.cur -= rdev->qpmask + 1; mutex_unlock(&rdev->stats.lock); } kfree(entry); } list_for_each_safe(pos, nxt, &uctx->qpids) { entry = list_entry(pos, struct c4iw_qid_list, entry); list_del_init(&entry->entry); kfree(entry); } mutex_unlock(&uctx->lock); } void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx) { INIT_LIST_HEAD(&uctx->qpids); INIT_LIST_HEAD(&uctx->cqids); mutex_init(&uctx->lock); } static int c4iw_rdev_open(struct c4iw_rdev *rdev) { struct adapter *sc = rdev->adap; int rc; c4iw_init_dev_ucontext(rdev, &rdev->uctx); /* Save the status page size set by if_cxgbe */ spg_creds = (t4_read_reg(sc, A_SGE_CONTROL) & F_EGRSTATUSPAGESIZE) ? 2 : 1; /* XXX: we can probably make this work */ if (sc->sge.eq_s_qpp > PAGE_SHIFT || sc->sge.iq_s_qpp > PAGE_SHIFT) { device_printf(sc->dev, "doorbell density too high (eq %d, iq %d, pg %d).\n", sc->sge.eq_s_qpp, sc->sge.eq_s_qpp, PAGE_SHIFT); rc = -EINVAL; goto err1; } rdev->qpshift = PAGE_SHIFT - sc->sge.eq_s_qpp; rdev->qpmask = (1 << sc->sge.eq_s_qpp) - 1; rdev->cqshift = PAGE_SHIFT - sc->sge.iq_s_qpp; rdev->cqmask = (1 << sc->sge.iq_s_qpp) - 1; if (c4iw_num_stags(rdev) == 0) { rc = -EINVAL; goto err1; } rdev->stats.pd.total = T4_MAX_NUM_PD; rdev->stats.stag.total = sc->vres.stag.size; rdev->stats.pbl.total = sc->vres.pbl.size; rdev->stats.rqt.total = sc->vres.rq.size; rdev->stats.qid.total = sc->vres.qp.size; rc = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); if (rc) { device_printf(sc->dev, "error %d initializing resources\n", rc); goto err1; } rc = c4iw_pblpool_create(rdev); if (rc) { device_printf(sc->dev, "error %d initializing pbl pool\n", rc); goto err2; } rc = c4iw_rqtpool_create(rdev); if (rc) { device_printf(sc->dev, "error %d initializing rqt pool\n", rc); goto err3; } return (0); err3: c4iw_pblpool_destroy(rdev); err2: c4iw_destroy_resource(&rdev->resource); err1: return (rc); } static void c4iw_rdev_close(struct c4iw_rdev *rdev) { c4iw_pblpool_destroy(rdev); c4iw_rqtpool_destroy(rdev); c4iw_destroy_resource(&rdev->resource); } static void c4iw_dealloc(struct c4iw_dev *iwsc) { c4iw_rdev_close(&iwsc->rdev); idr_destroy(&iwsc->cqidr); idr_destroy(&iwsc->qpidr); idr_destroy(&iwsc->mmidr); ib_dealloc_device(&iwsc->ibdev); } static struct c4iw_dev * c4iw_alloc(struct adapter *sc) { struct c4iw_dev *iwsc; int rc; iwsc = (struct c4iw_dev *)ib_alloc_device(sizeof(*iwsc)); if (iwsc == NULL) { device_printf(sc->dev, "Cannot allocate ib device.\n"); return (ERR_PTR(-ENOMEM)); } iwsc->rdev.adap = sc; rc = c4iw_rdev_open(&iwsc->rdev); if (rc != 0) { device_printf(sc->dev, "Unable to open CXIO rdev (%d)\n", rc); ib_dealloc_device(&iwsc->ibdev); return (ERR_PTR(rc)); } idr_init(&iwsc->cqidr); idr_init(&iwsc->qpidr); idr_init(&iwsc->mmidr); spin_lock_init(&iwsc->lock); mutex_init(&iwsc->rdev.stats.lock); return (iwsc); } static int c4iw_mod_load(void); static int c4iw_mod_unload(void); static int c4iw_activate(struct adapter *); static int c4iw_deactivate(struct adapter *); static struct uld_info c4iw_uld_info = { .uld_id = ULD_IWARP, .activate = c4iw_activate, .deactivate = c4iw_deactivate, }; static int c4iw_activate(struct adapter *sc) { struct c4iw_dev *iwsc; int rc; ASSERT_SYNCHRONIZED_OP(sc); if (uld_active(sc, ULD_IWARP)) { KASSERT(0, ("%s: RDMA already eanbled on sc %p", __func__, sc)); return (0); } if (sc->rdmacaps == 0) { device_printf(sc->dev, "RDMA not supported or RDMA cap is not enabled.\n"); return (ENOSYS); } iwsc = c4iw_alloc(sc); if (IS_ERR(iwsc)) { rc = -PTR_ERR(iwsc); device_printf(sc->dev, "initialization failed: %d\n", rc); return (rc); } sc->iwarp_softc = iwsc; c4iw_cm_init_cpl(sc); rc = -c4iw_register_device(iwsc); if (rc) { device_printf(sc->dev, "RDMA registration failed: %d\n", rc); c4iw_dealloc(iwsc); sc->iwarp_softc = NULL; } return (rc); } static int c4iw_deactivate(struct adapter *sc) { struct c4iw_dev *iwsc = sc->iwarp_softc; ASSERT_SYNCHRONIZED_OP(sc); c4iw_unregister_device(iwsc); c4iw_dealloc(iwsc); sc->iwarp_softc = NULL; return (0); } static void c4iw_activate_all(struct adapter *sc, void *arg __unused) { if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwact") != 0) return; /* Activate iWARP if any port on this adapter has IFCAP_TOE enabled. */ if (sc->offload_map && !uld_active(sc, ULD_IWARP)) (void) t4_activate_uld(sc, ULD_IWARP); end_synchronized_op(sc, 0); } static void c4iw_deactivate_all(struct adapter *sc, void *arg __unused) { if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwdea") != 0) return; if (uld_active(sc, ULD_IWARP)) (void) t4_deactivate_uld(sc, ULD_IWARP); end_synchronized_op(sc, 0); } static int c4iw_mod_load(void) { int rc; rc = -c4iw_cm_init(); if (rc != 0) return (rc); rc = t4_register_uld(&c4iw_uld_info); if (rc != 0) { c4iw_cm_term(); return (rc); } t4_iterate(c4iw_activate_all, NULL); return (rc); } static int c4iw_mod_unload(void) { t4_iterate(c4iw_deactivate_all, NULL); c4iw_cm_term(); if (t4_unregister_uld(&c4iw_uld_info) == EBUSY) return (EBUSY); return (0); } #endif #undef MODULE_VERSION #include /* * t4_tom won't load on kernels without TCP_OFFLOAD and this module's dependency * on t4_tom ensures that it won't either. So we don't directly check for * TCP_OFFLOAD here. */ static int c4iw_modevent(module_t mod, int cmd, void *arg) { int rc = 0; #ifdef TCP_OFFLOAD switch (cmd) { case MOD_LOAD: rc = c4iw_mod_load(); if (rc == 0) printf("iw_cxgbe: Chelsio T4/T5 RDMA driver loaded.\n"); break; case MOD_UNLOAD: rc = c4iw_mod_unload(); break; default: rc = EINVAL; } #else printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); rc = EOPNOTSUPP; #endif return (rc); } static moduledata_t c4iw_mod_data = { "iw_cxgbe", c4iw_modevent, 0 }; MODULE_VERSION(iw_cxgbe, 1); MODULE_DEPEND(iw_cxgbe, t4nex, 1, 1, 1); MODULE_DEPEND(iw_cxgbe, t4_tom, 1, 1, 1); MODULE_DEPEND(iw_cxgbe, ibcore, 1, 1, 1); DECLARE_MODULE(iw_cxgbe, c4iw_mod_data, SI_SUB_EXEC, SI_ORDER_ANY);