/* SPDX-License-Identifier: BSD-3-Clause */ /* Copyright (c) 2024, Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. 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. * * 3. Neither the name of the Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /** * @file ice_rdma.c * @brief RDMA client driver interface * * Functions to interface with the RDMA client driver, for enabling RMDA * functionality for the ice driver. * * The RDMA client interface is based on a simple kobject interface which is * defined by the rmda_if.m and irdma_di_if.m interfaces. * * The ice device driver provides the rmda_di_if.m interface methods, while * the client RDMA driver provides the irdma_if.m interface methods as an * extension ontop of the irdma_di_if kobject. * * The initial connection between drivers is done via the RDMA client driver * calling ice_rdma_register. */ #include "ice_iflib.h" #include "ice_rdma_internal.h" #include "irdma_if.h" #include "irdma_di_if.h" /** * @var ice_rdma * @brief global RDMA driver state * * Contains global state the driver uses to connect to a client RDMA interface * driver. */ static struct ice_rdma_state ice_rdma; /* * Helper function prototypes */ static int ice_rdma_pf_attach_locked(struct ice_softc *sc); static void ice_rdma_pf_detach_locked(struct ice_softc *sc); static int ice_rdma_check_version(struct ice_rdma_info *info); static void ice_rdma_cp_qos_info(struct ice_hw *hw, struct ice_dcbx_cfg *dcbx_cfg, struct ice_qos_params *qos_info); /* * RDMA Device Interface prototypes */ static int ice_rdma_pf_reset(struct ice_rdma_peer *peer); static int ice_rdma_pf_msix_init(struct ice_rdma_peer *peer, struct ice_rdma_msix_mapping *msix_info); static int ice_rdma_qset_register_request(struct ice_rdma_peer *peer, struct ice_rdma_qset_update *res); static int ice_rdma_update_vsi_filter(struct ice_rdma_peer *peer_dev, bool enable); static void ice_rdma_request_handler(struct ice_rdma_peer *peer, struct ice_rdma_request *req); /** * @var ice_rdma_di_methods * @brief RDMA driver interface methods * * Kobject methods implementing the driver-side interface for the RDMA peer * clients. This method table contains the operations which the client can * request from the driver. * * The client driver will then extend this kobject class with methods that the * driver can request from the client. */ static kobj_method_t ice_rdma_di_methods[] = { KOBJMETHOD(irdma_di_reset, ice_rdma_pf_reset), KOBJMETHOD(irdma_di_msix_init, ice_rdma_pf_msix_init), KOBJMETHOD(irdma_di_qset_register_request, ice_rdma_qset_register_request), KOBJMETHOD(irdma_di_vsi_filter_update, ice_rdma_update_vsi_filter), KOBJMETHOD(irdma_di_req_handler, ice_rdma_request_handler), KOBJMETHOD_END }; /* Define ice_rdma_di class which will be extended by the iRDMA driver */ DEFINE_CLASS_0(ice_rdma_di, ice_rdma_di_class, ice_rdma_di_methods, sizeof(struct ice_rdma_peer)); /** * ice_rdma_pf_reset - RDMA client interface requested a reset * @peer: the RDMA peer client structure * * Implements IRDMA_DI_RESET, called by the RDMA client driver to request * a reset of an ice driver device. * @return 0 on success */ static int ice_rdma_pf_reset(struct ice_rdma_peer *peer) { struct ice_softc *sc = ice_rdma_peer_to_sc(peer); /* Tell the base driver that RDMA is requesting a PFR */ ice_set_state(&sc->state, ICE_STATE_RESET_PFR_REQ); /* XXX: Base driver will notify RDMA when it's done */ return (0); } /** * ice_rdma_pf_msix_init - RDMA client interface request MSI-X initialization * @peer: the RDMA peer client structure * @msix_info: requested MSI-X mapping * * Implements IRDMA_DI_MSIX_INIT, called by the RDMA client driver to * initialize the MSI-X resources required for RDMA functionality. * @returns ENOSYS */ static int ice_rdma_pf_msix_init(struct ice_rdma_peer *peer, struct ice_rdma_msix_mapping __unused *msix_info) { struct ice_softc *sc = ice_rdma_peer_to_sc(peer); MPASS(msix_info != NULL); device_printf(sc->dev, "%s: iRDMA MSI-X initialization request is not yet implemented\n", __func__); /* TODO: implement MSI-X initialization for RDMA */ return (ENOSYS); } /** * ice_rdma_register_request - RDMA client interface request qset * registration or unregistration * @peer: the RDMA peer client structure * @res: resources to be registered or unregistered * @returns 0 on success, EINVAL on argument issues, ENOMEM on memory * allocation failure, EXDEV on vsi device mismatch */ static int ice_rdma_qset_register_request(struct ice_rdma_peer *peer, struct ice_rdma_qset_update *res) { struct ice_softc *sc = ice_rdma_peer_to_sc(peer); struct ice_vsi *vsi = NULL; struct ice_dcbx_cfg *dcbx_cfg; struct ice_hw *hw = &sc->hw; enum ice_status status; int count, i, ret = 0; uint32_t *qset_teid; uint16_t *qs_handle; uint16_t max_rdmaqs[ICE_MAX_TRAFFIC_CLASS]; uint16_t vsi_id; uint8_t ena_tc = 0; if (!res) return -EINVAL; if (res->cnt_req > ICE_MAX_TXQ_PER_TXQG) return -EINVAL; switch(res->res_type) { case ICE_RDMA_QSET_ALLOC: count = res->cnt_req; vsi_id = peer->pf_vsi_num; break; case ICE_RDMA_QSET_FREE: count = res->res_allocated; vsi_id = res->qsets.vsi_id; break; default: return -EINVAL; } qset_teid = (uint32_t *)ice_calloc(hw, count, sizeof(*qset_teid)); if (!qset_teid) return -ENOMEM; qs_handle = (uint16_t *)ice_calloc(hw, count, sizeof(*qs_handle)); if (!qs_handle) { ice_free(hw, qset_teid); return -ENOMEM; } ice_for_each_traffic_class(i) max_rdmaqs[i] = 0; for (i = 0; i < sc->num_available_vsi; i++) { if (sc->all_vsi[i] && ice_get_hw_vsi_num(hw, sc->all_vsi[i]->idx) == vsi_id) { vsi = sc->all_vsi[i]; break; } } if (!vsi) { ice_debug(hw, ICE_DBG_RDMA, "RDMA QSet invalid VSI\n"); ret = -EINVAL; goto out; } if (sc != vsi->sc) { ice_debug(hw, ICE_DBG_RDMA, "VSI is tied to unexpected device\n"); ret = -EXDEV; goto out; } for (i = 0; i < count; i++) { struct ice_rdma_qset_params *qset; qset = &res->qsets; if (qset->vsi_id != peer->pf_vsi_num) { ice_debug(hw, ICE_DBG_RDMA, "RDMA QSet invalid VSI requested %d %d\n", qset->vsi_id, peer->pf_vsi_num); ret = -EINVAL; goto out; } max_rdmaqs[qset->tc]++; qs_handle[i] = qset->qs_handle; qset_teid[i] = qset->teid; } switch(res->res_type) { case ICE_RDMA_QSET_ALLOC: dcbx_cfg = &hw->port_info->qos_cfg.local_dcbx_cfg; ena_tc = ice_dcb_get_tc_map(dcbx_cfg); ice_debug(hw, ICE_DBG_RDMA, "%s:%d ena_tc=%x\n", __func__, __LINE__, ena_tc); status = ice_cfg_vsi_rdma(hw->port_info, vsi->idx, ena_tc, max_rdmaqs); if (status) { ice_debug(hw, ICE_DBG_RDMA, "Failed VSI RDMA qset config\n"); ret = -EINVAL; goto out; } for (i = 0; i < count; i++) { struct ice_rdma_qset_params *qset; qset = &res->qsets; status = ice_ena_vsi_rdma_qset(hw->port_info, vsi->idx, qset->tc, &qs_handle[i], 1, &qset_teid[i]); if (status) { ice_debug(hw, ICE_DBG_RDMA, "Failed VSI RDMA qset enable\n"); ret = -EINVAL; goto out; } qset->teid = qset_teid[i]; } break; case ICE_RDMA_QSET_FREE: status = ice_dis_vsi_rdma_qset(hw->port_info, count, qset_teid, qs_handle); if (status) ret = -EINVAL; break; default: ret = -EINVAL; break; } out: ice_free(hw, qs_handle); ice_free(hw, qset_teid); return ret; } /** * ice_rdma_update_vsi_filter - configure vsi information * when opening or closing rdma driver * @peer: the RDMA peer client structure * @enable: enable or disable the rdma filter * @return 0 on success, EINVAL on wrong vsi */ static int ice_rdma_update_vsi_filter(struct ice_rdma_peer *peer, bool enable) { struct ice_softc *sc = ice_rdma_peer_to_sc(peer); struct ice_vsi *vsi; int ret; vsi = &sc->pf_vsi; if (!vsi) return -EINVAL; ret = ice_cfg_iwarp_fltr(&sc->hw, vsi->idx, enable); if (ret) { device_printf(sc->dev, "Failed to %sable iWARP filtering\n", enable ? "en" : "dis"); } else { if (enable) vsi->info.q_opt_flags |= ICE_AQ_VSI_Q_OPT_PE_FLTR_EN; else vsi->info.q_opt_flags &= ~ICE_AQ_VSI_Q_OPT_PE_FLTR_EN; } return ret; } /** * ice_rdma_request_handler - handle requests incoming from RDMA driver * @peer: the RDMA peer client structure * @req: structure containing request */ static void ice_rdma_request_handler(struct ice_rdma_peer *peer, struct ice_rdma_request *req) { if (!req || !peer) { log(LOG_WARNING, "%s: peer or req are not valid\n", __func__); return; } switch(req->type) { case ICE_RDMA_EVENT_RESET: ice_rdma_pf_reset(peer); break; case ICE_RDMA_EVENT_QSET_REGISTER: ice_rdma_qset_register_request(peer, &req->res); break; case ICE_RDMA_EVENT_VSI_FILTER_UPDATE: ice_rdma_update_vsi_filter(peer, req->enable_filter); break; default: log(LOG_WARNING, "%s: Event %d not supported\n", __func__, req->type); break; } } /** * ice_rdma_cp_qos_info - gather current QOS/DCB settings in LAN to pass * to RDMA driver * @hw: ice hw structure * @dcbx_cfg: current DCB settings in ice driver * @qos_info: destination of the DCB settings */ static void ice_rdma_cp_qos_info(struct ice_hw *hw, struct ice_dcbx_cfg *dcbx_cfg, struct ice_qos_params *qos_info) { u32 up2tc; u8 j; u8 num_tc = 0; u8 val_tc = 0; /* number of TC for validation */ u8 cnt_tc = 0; /* setup qos_info fields with defaults */ qos_info->num_apps = 0; qos_info->num_tc = 1; for (j = 0; j < ICE_TC_MAX_USER_PRIORITY; j++) qos_info->up2tc[j] = 0; qos_info->tc_info[0].rel_bw = 100; for (j = 1; j < IEEE_8021QAZ_MAX_TCS; j++) qos_info->tc_info[j].rel_bw = 0; /* gather current values */ up2tc = rd32(hw, PRTDCB_TUP2TC); qos_info->num_apps = dcbx_cfg->numapps; for (j = 0; j < ICE_MAX_TRAFFIC_CLASS; j++) { num_tc |= BIT(dcbx_cfg->etscfg.prio_table[j]); } for (j = 0; j < ICE_MAX_TRAFFIC_CLASS; j++) { if (num_tc & BIT(j)) { cnt_tc++; val_tc |= BIT(j); } else { break; } } qos_info->num_tc = (val_tc == num_tc && num_tc != 0) ? cnt_tc : 1; for (j = 0; j < ICE_TC_MAX_USER_PRIORITY; j++) qos_info->up2tc[j] = (up2tc >> (j * 3)) & 0x7; for (j = 0; j < IEEE_8021QAZ_MAX_TCS; j++) qos_info->tc_info[j].rel_bw = dcbx_cfg->etscfg.tcbwtable[j]; for (j = 0; j < qos_info->num_apps; j++) { qos_info->apps[j].priority = dcbx_cfg->app[j].priority; qos_info->apps[j].prot_id = dcbx_cfg->app[j].prot_id; qos_info->apps[j].selector = dcbx_cfg->app[j].selector; } /* Gather DSCP-to-TC mapping and QoS/PFC mode */ memcpy(qos_info->dscp_map, dcbx_cfg->dscp_map, sizeof(qos_info->dscp_map)); qos_info->pfc_mode = dcbx_cfg->pfc_mode; } /** * ice_rdma_check_version - Check that the provided RDMA version is compatible * @info: the RDMA client information structure * * Verify that the client RDMA driver provided a version that is compatible * with the driver interface. * @return 0 on success, ENOTSUP when LAN-RDMA interface version doesn't match, * EINVAL on kobject interface fail. */ static int ice_rdma_check_version(struct ice_rdma_info *info) { /* Make sure the MAJOR version matches */ if (info->major_version != ICE_RDMA_MAJOR_VERSION) { log(LOG_WARNING, "%s: the iRDMA driver requested version %d.%d.%d, but this driver only supports major version %d.x.x\n", __func__, info->major_version, info->minor_version, info->patch_version, ICE_RDMA_MAJOR_VERSION); return (ENOTSUP); } /* * Make sure that the MINOR version is compatible. * * This means that the RDMA client driver version MUST not be greater * than the version provided by the driver, as it would indicate that * the RDMA client expects features which are not supported by the * main driver. */ if (info->minor_version > ICE_RDMA_MINOR_VERSION) { log(LOG_WARNING, "%s: the iRDMA driver requested version %d.%d.%d, but this driver only supports up to minor version %d.%d.x\n", __func__, info->major_version, info->minor_version, info->patch_version, ICE_RDMA_MAJOR_VERSION, ICE_RDMA_MINOR_VERSION); return (ENOTSUP); } /* * Make sure that the PATCH version is compatible. * * This means that the RDMA client version MUST not be greater than * the version provided by the driver, as it may indicate that the * RDMA client expects certain backwards compatible bug fixes which * are not implemented by this version of the main driver. */ if ((info->minor_version == ICE_RDMA_MINOR_VERSION) && (info->patch_version > ICE_RDMA_PATCH_VERSION)) { log(LOG_WARNING, "%s: the iRDMA driver requested version %d.%d.%d, but this driver only supports up to patch version %d.%d.%d\n", __func__, info->major_version, info->minor_version, info->patch_version, ICE_RDMA_MAJOR_VERSION, ICE_RDMA_MINOR_VERSION, ICE_RDMA_PATCH_VERSION); return (ENOTSUP); } /* Make sure that the kobject class is initialized */ if (info->rdma_class == NULL) { log(LOG_WARNING, "%s: the iRDMA driver did not specify a kobject interface\n", __func__); return (EINVAL); } return (0); } /** * ice_rdma_register - Register an RDMA client driver * @info: the RDMA client information structure * * Called by the RDMA client driver on load. Used to initialize the RDMA * client driver interface and enable interop between the ice driver and the * RDMA client driver. * * The RDMA client driver must provide the version number it expects, along * with a pointer to a kobject class that extends the irdma_di_if class, and * implements the irdma_if class interface. * @return 0 on success, ECONNREFUSED when RDMA is turned off, EBUSY when irdma * already registered, ENOTSUP when LAN-RDMA interface version doesn't match, * EINVAL on kobject interface fail. */ int ice_rdma_register(struct ice_rdma_info *info) { struct ice_rdma_entry *entry; struct ice_softc *sc; int err = 0; sx_xlock(&ice_rdma.mtx); if (!ice_enable_irdma) { log(LOG_INFO, "%s: The iRDMA driver interface has been disabled\n", __func__); err = (ECONNREFUSED); goto return_unlock; } if (ice_rdma.registered) { log(LOG_WARNING, "%s: iRDMA driver already registered\n", __func__); err = (EBUSY); goto return_unlock; } /* Make sure the iRDMA version is compatible */ err = ice_rdma_check_version(info); if (err) goto return_unlock; log(LOG_INFO, "%s: iRDMA driver registered using version %d.%d.%d\n", __func__, info->major_version, info->minor_version, info->patch_version); ice_rdma.peer_class = info->rdma_class; /* * Initialize the kobject interface and notify the RDMA client of each * existing PF interface. */ LIST_FOREACH(entry, &ice_rdma.peers, node) { kobj_init((kobj_t)&entry->peer, ice_rdma.peer_class); /* Gather DCB/QOS info into peer */ sc = __containerof(entry, struct ice_softc, rdma_entry); memset(&entry->peer.initial_qos_info, 0, sizeof(entry->peer.initial_qos_info)); ice_rdma_cp_qos_info(&sc->hw, &sc->hw.port_info->qos_cfg.local_dcbx_cfg, &entry->peer.initial_qos_info); IRDMA_PROBE(&entry->peer); if (entry->initiated) IRDMA_OPEN(&entry->peer); } ice_rdma.registered = true; return_unlock: sx_xunlock(&ice_rdma.mtx); return (err); } /** * ice_rdma_unregister - Unregister an RDMA client driver * * Called by the RDMA client driver on unload. Used to de-initialize the RDMA * client driver interface and shut down communication between the ice driver * and the RDMA client driver. * @return 0 on success, ENOENT when irdma driver wasn't registered */ int ice_rdma_unregister(void) { struct ice_rdma_entry *entry; sx_xlock(&ice_rdma.mtx); if (!ice_rdma.registered) { log(LOG_WARNING, "%s: iRDMA driver was not previously registered\n", __func__); sx_xunlock(&ice_rdma.mtx); return (ENOENT); } log(LOG_INFO, "%s: iRDMA driver unregistered\n", __func__); ice_rdma.registered = false; ice_rdma.peer_class = NULL; /* * Release the kobject interface for each of the existing PF * interfaces. Note that we do not notify the client about removing * each PF, as it is assumed that the client will have already cleaned * up any associated resources when it is unregistered. */ LIST_FOREACH(entry, &ice_rdma.peers, node) kobj_delete((kobj_t)&entry->peer, NULL); sx_xunlock(&ice_rdma.mtx); return (0); } /** * ice_rdma_init - RDMA driver init routine * * Called during ice driver module initialization to setup the RDMA client * interface mutex and RDMA peer structure list. */ void ice_rdma_init(void) { LIST_INIT(&ice_rdma.peers); sx_init_flags(&ice_rdma.mtx, "ice rdma interface", SX_DUPOK); ice_rdma.registered = false; ice_rdma.peer_class = NULL; } /** * ice_rdma_exit - RDMA driver exit routine * * Called during ice driver module exit to shutdown the RDMA client interface * mutex. */ void ice_rdma_exit(void) { MPASS(LIST_EMPTY(&ice_rdma.peers)); sx_destroy(&ice_rdma.mtx); } /** * ice_rdma_pf_attach_locked - Prepare a PF for RDMA connections * @sc: the ice driver softc * * Initialize a peer entry for this PF and add it to the RDMA interface list. * Notify the client RDMA driver of a new PF device. * * @pre must be called while holding the ice_rdma mutex. * @return 0 on success and when RDMA feature is not available, EEXIST when * irdma is already attached */ static int ice_rdma_pf_attach_locked(struct ice_softc *sc) { struct ice_rdma_entry *entry; /* Do not attach the PF unless RDMA is supported */ if (!ice_is_bit_set(sc->feat_cap, ICE_FEATURE_RDMA)) return (0); entry = &sc->rdma_entry; if (entry->attached) { device_printf(sc->dev, "iRDMA peer entry already exists\n"); return (EEXIST); } entry->attached = true; entry->peer.dev = sc->dev; entry->peer.ifp = sc->ifp; entry->peer.pf_id = sc->hw.pf_id; entry->peer.pci_mem = sc->bar0.res; entry->peer.pf_vsi_num = ice_get_hw_vsi_num(&sc->hw, sc->pf_vsi.idx); if (sc->rdma_imap && sc->rdma_imap[0] != ICE_INVALID_RES_IDX && sc->irdma_vectors > 0) { entry->peer.msix.base = sc->rdma_imap[0]; entry->peer.msix.count = sc->irdma_vectors; } /* Gather DCB/QOS info into peer */ memset(&entry->peer.initial_qos_info, 0, sizeof(entry->peer.initial_qos_info)); ice_rdma_cp_qos_info(&sc->hw, &sc->hw.port_info->qos_cfg.local_dcbx_cfg, &entry->peer.initial_qos_info); /* * If the RDMA client driver has already registered, initialize the * kobject and notify the client of a new PF */ if (ice_rdma.registered) { kobj_init((kobj_t)&entry->peer, ice_rdma.peer_class); IRDMA_PROBE(&entry->peer); } LIST_INSERT_HEAD(&ice_rdma.peers, entry, node); ice_set_bit(ICE_FEATURE_RDMA, sc->feat_en); return (0); } /** * ice_rdma_pf_attach - Notify the RDMA client of a new PF * @sc: the ice driver softc * * Called during PF attach to notify the RDMA client of a new PF. * @return 0 or EEXIST if irdma was already attached */ int ice_rdma_pf_attach(struct ice_softc *sc) { int err; sx_xlock(&ice_rdma.mtx); err = ice_rdma_pf_attach_locked(sc); sx_xunlock(&ice_rdma.mtx); return (err); } /** * ice_rdma_pf_detach_locked - Notify the RDMA client on PF detach * @sc: the ice driver softc * * Notify the RDMA peer client driver of removal of a PF, and release any * RDMA-specific resources associated with that PF. Remove the PF from the * list of available RDMA entries. * * @pre must be called while holding the ice_rdma mutex. */ static void ice_rdma_pf_detach_locked(struct ice_softc *sc) { struct ice_rdma_entry *entry; /* No need to detach the PF if RDMA is not enabled */ if (!ice_is_bit_set(sc->feat_en, ICE_FEATURE_RDMA)) return; entry = &sc->rdma_entry; if (!entry->attached) { device_printf(sc->dev, "iRDMA peer entry was not attached\n"); return; } /* * If the RDMA client driver is registered, notify the client that * a PF has been removed, and release the kobject reference. */ if (ice_rdma.registered) { IRDMA_REMOVE(&entry->peer); kobj_delete((kobj_t)&entry->peer, NULL); } LIST_REMOVE(entry, node); entry->attached = false; ice_clear_bit(ICE_FEATURE_RDMA, sc->feat_en); } /** * ice_rdma_pf_detach - Notify the RDMA client of a PF detaching * @sc: the ice driver softc * * Take the ice_rdma mutex and then notify the RDMA client that a PF has been * removed. */ void ice_rdma_pf_detach(struct ice_softc *sc) { sx_xlock(&ice_rdma.mtx); ice_rdma_pf_detach_locked(sc); sx_xunlock(&ice_rdma.mtx); } /** * ice_rdma_pf_init - Notify the RDMA client that a PF has initialized * @sc: the ice driver softc * * Called by the ice driver when a PF has been initialized. Notifies the RDMA * client that a PF is up and ready to operate. * @return 0 on success, propagates IRDMA_OPEN return value */ int ice_rdma_pf_init(struct ice_softc *sc) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; sx_xlock(&ice_rdma.mtx); /* Update the MTU */ peer->mtu = sc->ifp->if_mtu; sc->rdma_entry.initiated = true; if (sc->rdma_entry.attached && ice_rdma.registered) { sx_xunlock(&ice_rdma.mtx); return IRDMA_OPEN(peer); } sx_xunlock(&ice_rdma.mtx); return (0); } /** * ice_rdma_pf_stop - Notify the RDMA client of a stopped PF device * @sc: the ice driver softc * * Called by the ice driver when a PF is stopped. Notifies the RDMA client * driver that the PF has stopped and is not ready to operate. * @return 0 on success */ int ice_rdma_pf_stop(struct ice_softc *sc) { sx_xlock(&ice_rdma.mtx); sc->rdma_entry.initiated = false; if (sc->rdma_entry.attached && ice_rdma.registered) { sx_xunlock(&ice_rdma.mtx); return IRDMA_CLOSE(&sc->rdma_entry.peer); } sx_xunlock(&ice_rdma.mtx); return (0); } /** * ice_rdma_link_change - Notify RDMA client of a change in link status * @sc: the ice driver softc * @linkstate: the link status * @baudrate: the link rate in bits per second * * Notify the RDMA client of a link status change, by sending it the new link * state and baudrate. * * The link state is represented the same was as in the ifnet structure. It * should be LINK_STATE_UNKNOWN, LINK_STATE_DOWN, or LINK_STATE_UP. */ void ice_rdma_link_change(struct ice_softc *sc, int linkstate, uint64_t baudrate) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; struct ice_rdma_event event; memset(&event, 0, sizeof(struct ice_rdma_event)); event.type = ICE_RDMA_EVENT_LINK_CHANGE; event.linkstate = linkstate; event.baudrate = baudrate; sx_xlock(&ice_rdma.mtx); if (sc->rdma_entry.attached && ice_rdma.registered) IRDMA_EVENT_HANDLER(peer, &event); sx_xunlock(&ice_rdma.mtx); } /** * ice_rdma_notify_dcb_qos_change - notify RDMA driver to pause traffic * @sc: the ice driver softc * * Notify the RDMA driver that QOS/DCB settings are about to change. * Once the function return, all the QPs should be suspended. */ void ice_rdma_notify_dcb_qos_change(struct ice_softc *sc) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; struct ice_rdma_event event; memset(&event, 0, sizeof(struct ice_rdma_event)); event.type = ICE_RDMA_EVENT_TC_CHANGE; /* pre-event */ event.prep = true; sx_xlock(&ice_rdma.mtx); if (sc->rdma_entry.attached && ice_rdma.registered) IRDMA_EVENT_HANDLER(peer, &event); sx_xunlock(&ice_rdma.mtx); } /** * ice_rdma_dcb_qos_update - pass the changed dcb settings to RDMA driver * @sc: the ice driver softc * @pi: the port info structure * * Pass the changed DCB settings to RDMA traffic. This function should be * called only after ice_rdma_notify_dcb_qos_change has been called and * returned before. After the function returns, all the RDMA traffic * should be resumed. */ void ice_rdma_dcb_qos_update(struct ice_softc *sc, struct ice_port_info *pi) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; struct ice_rdma_event event; memset(&event, 0, sizeof(struct ice_rdma_event)); event.type = ICE_RDMA_EVENT_TC_CHANGE; /* post-event */ event.prep = false; /* gather current configuration */ ice_rdma_cp_qos_info(&sc->hw, &pi->qos_cfg.local_dcbx_cfg, &event.port_qos); sx_xlock(&ice_rdma.mtx); if (sc->rdma_entry.attached && ice_rdma.registered) IRDMA_EVENT_HANDLER(peer, &event); sx_xunlock(&ice_rdma.mtx); } /** * ice_rdma_notify_pe_intr - notify irdma on incoming interrupts regarding PE * @sc: the ice driver softc * @oicr: interrupt cause * * Pass the information about received interrupt to RDMA driver if it was * relating to PE. Specifically PE_CRITERR and HMC_ERR. * The irdma driver shall decide what should be done upon these interrupts. */ void ice_rdma_notify_pe_intr(struct ice_softc *sc, uint32_t oicr) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; struct ice_rdma_event event; memset(&event, 0, sizeof(struct ice_rdma_event)); event.type = ICE_RDMA_EVENT_CRIT_ERR; event.oicr_reg = oicr; sx_xlock(&ice_rdma.mtx); if (sc->rdma_entry.attached && ice_rdma.registered) IRDMA_EVENT_HANDLER(peer, &event); sx_xunlock(&ice_rdma.mtx); } /** * ice_rdma_notify_reset - notify irdma on incoming pf-reset * @sc: the ice driver softc * * Inform irdma driver of an incoming PF reset. * The irdma driver shall set its state to reset, and avoid using CQP * anymore. Next step should be to call ice_rdma_pf_stop in order to * remove resources. */ void ice_rdma_notify_reset(struct ice_softc *sc) { struct ice_rdma_peer *peer = &sc->rdma_entry.peer; struct ice_rdma_event event; memset(&event, 0, sizeof(struct ice_rdma_event)); event.type = ICE_RDMA_EVENT_RESET; sx_xlock(&ice_rdma.mtx); if (sc->rdma_entry.attached && ice_rdma.registered) IRDMA_EVENT_HANDLER(peer, &event); sx_xunlock(&ice_rdma.mtx); }