/******************************************************************* * This file is part of the Emulex RoCE Device Driver for * * RoCE (RDMA over Converged Ethernet) adapters. * * Copyright (C) 2008-2012 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * * * Contact Information: * linux-drivers@emulex.com * * Emulex * 3333 Susan Street * Costa Mesa, CA 92626 *******************************************************************/ #include #include #include #include #include #include #include #include #include "ocrdma.h" #include "ocrdma_verbs.h" #include "ocrdma_ah.h" #include "be_roce.h" #include "ocrdma_hw.h" #include "ocrdma_stats.h" #include "ocrdma_abi.h" MODULE_VERSION(OCRDMA_ROCE_DRV_VERSION); MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION); MODULE_AUTHOR("Emulex Corporation"); MODULE_LICENSE("GPL"); static LIST_HEAD(ocrdma_dev_list); static DEFINE_SPINLOCK(ocrdma_devlist_lock); static DEFINE_IDR(ocrdma_dev_id); static union ib_gid ocrdma_zero_sgid; void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid) { u8 mac_addr[6]; memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN); guid[0] = mac_addr[0] ^ 2; guid[1] = mac_addr[1]; guid[2] = mac_addr[2]; guid[3] = 0xff; guid[4] = 0xfe; guid[5] = mac_addr[3]; guid[6] = mac_addr[4]; guid[7] = mac_addr[5]; } static bool ocrdma_add_sgid(struct ocrdma_dev *dev, union ib_gid *new_sgid) { int i; unsigned long flags; memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid)); spin_lock_irqsave(&dev->sgid_lock, flags); for (i = 0; i < OCRDMA_MAX_SGID; i++) { if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid, sizeof(union ib_gid))) { /* found free entry */ memcpy(&dev->sgid_tbl[i], new_sgid, sizeof(union ib_gid)); spin_unlock_irqrestore(&dev->sgid_lock, flags); return true; } else if (!memcmp(&dev->sgid_tbl[i], new_sgid, sizeof(union ib_gid))) { /* entry already present, no addition is required. */ spin_unlock_irqrestore(&dev->sgid_lock, flags); return false; } } spin_unlock_irqrestore(&dev->sgid_lock, flags); return false; } static bool ocrdma_del_sgid(struct ocrdma_dev *dev, union ib_gid *sgid) { int found = false; int i; unsigned long flags; spin_lock_irqsave(&dev->sgid_lock, flags); /* first is default sgid, which cannot be deleted. */ for (i = 1; i < OCRDMA_MAX_SGID; i++) { if (!memcmp(&dev->sgid_tbl[i], sgid, sizeof(union ib_gid))) { /* found matching entry */ memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid)); found = true; break; } } spin_unlock_irqrestore(&dev->sgid_lock, flags); return found; } static int ocrdma_addr_event(unsigned long event, struct net_device *netdev, union ib_gid *gid) { struct ib_event gid_event; struct ocrdma_dev *dev; bool found = false; bool updated = false; bool is_vlan = false; is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN; if (is_vlan) netdev = rdma_vlan_dev_real_dev(netdev); rcu_read_lock(); list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) { if (dev->nic_info.netdev == netdev) { found = true; break; } } rcu_read_unlock(); if (!found) return NOTIFY_DONE; mutex_lock(&dev->dev_lock); switch (event) { case NETDEV_UP: updated = ocrdma_add_sgid(dev, gid); break; case NETDEV_DOWN: updated = ocrdma_del_sgid(dev, gid); break; default: break; } if (updated) { /* GID table updated, notify the consumers about it */ gid_event.device = &dev->ibdev; gid_event.element.port_num = 1; gid_event.event = IB_EVENT_GID_CHANGE; ib_dispatch_event(&gid_event); } mutex_unlock(&dev->dev_lock); return NOTIFY_OK; } static int ocrdma_inetaddr_event(struct notifier_block *notifier, unsigned long event, void *ptr) { struct in_ifaddr *ifa = ptr; union ib_gid gid; struct net_device *netdev = ifa->ifa_dev->dev; ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid); return ocrdma_addr_event(event, netdev, &gid); } static struct notifier_block ocrdma_inetaddr_notifier = { .notifier_call = ocrdma_inetaddr_event }; #if IS_ENABLED(CONFIG_IPV6) static int ocrdma_inet6addr_event(struct notifier_block *notifier, unsigned long event, void *ptr) { struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; union ib_gid *gid = (union ib_gid *)&ifa->addr; struct net_device *netdev = ifa->idev->dev; return ocrdma_addr_event(event, netdev, gid); } static struct notifier_block ocrdma_inet6addr_notifier = { .notifier_call = ocrdma_inet6addr_event }; #endif /* IPV6 and VLAN */ static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, u8 port_num) { return IB_LINK_LAYER_ETHERNET; } static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num, struct ib_port_immutable *immutable) { struct ib_port_attr attr; int err; err = ocrdma_query_port(ibdev, port_num, &attr); if (err) return err; immutable->pkey_tbl_len = attr.pkey_tbl_len; immutable->gid_tbl_len = attr.gid_tbl_len; immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; immutable->max_mad_size = IB_MGMT_MAD_SIZE; return 0; } static int ocrdma_register_device(struct ocrdma_dev *dev) { strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX); ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, sizeof(OCRDMA_NODE_DESC)); dev->ibdev.owner = THIS_MODULE; dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION; dev->ibdev.uverbs_cmd_mask = OCRDMA_UVERBS(GET_CONTEXT) | OCRDMA_UVERBS(QUERY_DEVICE) | OCRDMA_UVERBS(QUERY_PORT) | OCRDMA_UVERBS(ALLOC_PD) | OCRDMA_UVERBS(DEALLOC_PD) | OCRDMA_UVERBS(REG_MR) | OCRDMA_UVERBS(DEREG_MR) | OCRDMA_UVERBS(CREATE_COMP_CHANNEL) | OCRDMA_UVERBS(CREATE_CQ) | OCRDMA_UVERBS(RESIZE_CQ) | OCRDMA_UVERBS(DESTROY_CQ) | OCRDMA_UVERBS(REQ_NOTIFY_CQ) | OCRDMA_UVERBS(CREATE_QP) | OCRDMA_UVERBS(MODIFY_QP) | OCRDMA_UVERBS(QUERY_QP) | OCRDMA_UVERBS(DESTROY_QP) | OCRDMA_UVERBS(POLL_CQ) | OCRDMA_UVERBS(POST_SEND) | OCRDMA_UVERBS(POST_RECV); dev->ibdev.uverbs_cmd_mask |= OCRDMA_UVERBS(CREATE_AH) | OCRDMA_UVERBS(MODIFY_AH) | OCRDMA_UVERBS(QUERY_AH) | OCRDMA_UVERBS(DESTROY_AH); dev->ibdev.node_type = RDMA_NODE_IB_CA; dev->ibdev.phys_port_cnt = 1; dev->ibdev.num_comp_vectors = dev->eq_cnt; /* mandatory verbs. */ dev->ibdev.query_device = ocrdma_query_device; dev->ibdev.query_port = ocrdma_query_port; dev->ibdev.modify_port = ocrdma_modify_port; dev->ibdev.query_gid = ocrdma_query_gid; dev->ibdev.get_link_layer = ocrdma_link_layer; dev->ibdev.alloc_pd = ocrdma_alloc_pd; dev->ibdev.dealloc_pd = ocrdma_dealloc_pd; dev->ibdev.create_cq = ocrdma_create_cq; dev->ibdev.destroy_cq = ocrdma_destroy_cq; dev->ibdev.resize_cq = ocrdma_resize_cq; dev->ibdev.create_qp = ocrdma_create_qp; dev->ibdev.modify_qp = ocrdma_modify_qp; dev->ibdev.query_qp = ocrdma_query_qp; dev->ibdev.destroy_qp = ocrdma_destroy_qp; dev->ibdev.query_pkey = ocrdma_query_pkey; dev->ibdev.create_ah = ocrdma_create_ah; dev->ibdev.destroy_ah = ocrdma_destroy_ah; dev->ibdev.query_ah = ocrdma_query_ah; dev->ibdev.modify_ah = ocrdma_modify_ah; dev->ibdev.poll_cq = ocrdma_poll_cq; dev->ibdev.post_send = ocrdma_post_send; dev->ibdev.post_recv = ocrdma_post_recv; dev->ibdev.req_notify_cq = ocrdma_arm_cq; dev->ibdev.get_dma_mr = ocrdma_get_dma_mr; dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr; dev->ibdev.dereg_mr = ocrdma_dereg_mr; dev->ibdev.reg_user_mr = ocrdma_reg_user_mr; dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr; dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list; dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list; /* mandatory to support user space verbs consumer. */ dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext; dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext; dev->ibdev.mmap = ocrdma_mmap; dev->ibdev.dma_device = &dev->nic_info.pdev->dev; dev->ibdev.process_mad = ocrdma_process_mad; dev->ibdev.get_port_immutable = ocrdma_port_immutable; if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { dev->ibdev.uverbs_cmd_mask |= OCRDMA_UVERBS(CREATE_SRQ) | OCRDMA_UVERBS(MODIFY_SRQ) | OCRDMA_UVERBS(QUERY_SRQ) | OCRDMA_UVERBS(DESTROY_SRQ) | OCRDMA_UVERBS(POST_SRQ_RECV); dev->ibdev.create_srq = ocrdma_create_srq; dev->ibdev.modify_srq = ocrdma_modify_srq; dev->ibdev.query_srq = ocrdma_query_srq; dev->ibdev.destroy_srq = ocrdma_destroy_srq; dev->ibdev.post_srq_recv = ocrdma_post_srq_recv; } return ib_register_device(&dev->ibdev, NULL); } static int ocrdma_alloc_resources(struct ocrdma_dev *dev) { mutex_init(&dev->dev_lock); dev->sgid_tbl = kzalloc(sizeof(union ib_gid) * OCRDMA_MAX_SGID, GFP_KERNEL); if (!dev->sgid_tbl) goto alloc_err; spin_lock_init(&dev->sgid_lock); dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) * OCRDMA_MAX_CQ, GFP_KERNEL); if (!dev->cq_tbl) goto alloc_err; if (dev->attr.max_qp) { dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) * OCRDMA_MAX_QP, GFP_KERNEL); if (!dev->qp_tbl) goto alloc_err; } dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL); if (dev->stag_arr == NULL) goto alloc_err; ocrdma_alloc_pd_pool(dev); spin_lock_init(&dev->av_tbl.lock); spin_lock_init(&dev->flush_q_lock); return 0; alloc_err: pr_err("%s(%d) error.\n", __func__, dev->id); return -ENOMEM; } static void ocrdma_free_resources(struct ocrdma_dev *dev) { kfree(dev->stag_arr); kfree(dev->qp_tbl); kfree(dev->cq_tbl); kfree(dev->sgid_tbl); } /* OCRDMA sysfs interface */ static ssize_t show_rev(struct device *device, struct device_attribute *attr, char *buf) { struct ocrdma_dev *dev = dev_get_drvdata(device); return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor); } static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr, char *buf) { struct ocrdma_dev *dev = dev_get_drvdata(device); return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->attr.fw_ver[0]); } static ssize_t show_hca_type(struct device *device, struct device_attribute *attr, char *buf) { struct ocrdma_dev *dev = dev_get_drvdata(device); return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]); } static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL); static struct device_attribute *ocrdma_attributes[] = { &dev_attr_hw_rev, &dev_attr_fw_ver, &dev_attr_hca_type }; static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev) { int i; for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]); } static void ocrdma_add_default_sgid(struct ocrdma_dev *dev) { /* GID Index 0 - Invariant manufacturer-assigned EUI-64 */ union ib_gid *sgid = &dev->sgid_tbl[0]; sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); ocrdma_get_guid(dev, &sgid->raw[8]); } static void ocrdma_init_ipv4_gids(struct ocrdma_dev *dev, struct net_device *net) { struct in_device *in_dev; union ib_gid gid; in_dev = in_dev_get(net); if (in_dev) { for_ifa(in_dev) { ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid); ocrdma_add_sgid(dev, &gid); } endfor_ifa(in_dev); in_dev_put(in_dev); } } static void ocrdma_init_ipv6_gids(struct ocrdma_dev *dev, struct net_device *net) { #if IS_ENABLED(CONFIG_IPV6) struct inet6_dev *in6_dev; union ib_gid *pgid; struct inet6_ifaddr *ifp; in6_dev = in6_dev_get(net); if (in6_dev) { read_lock_bh(&in6_dev->lock); list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { pgid = (union ib_gid *)&ifp->addr; ocrdma_add_sgid(dev, pgid); } read_unlock_bh(&in6_dev->lock); in6_dev_put(in6_dev); } #endif } static void ocrdma_init_gid_table(struct ocrdma_dev *dev) { struct net_device *net_dev; for_each_netdev(&init_net, net_dev) { struct net_device *real_dev = rdma_vlan_dev_real_dev(net_dev) ? rdma_vlan_dev_real_dev(net_dev) : net_dev; if (real_dev == dev->nic_info.netdev) { ocrdma_add_default_sgid(dev); ocrdma_init_ipv4_gids(dev, net_dev); ocrdma_init_ipv6_gids(dev, net_dev); } } } static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) { int status = 0, i; struct ocrdma_dev *dev; dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev)); if (!dev) { pr_err("Unable to allocate ib device\n"); return NULL; } dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); if (!dev->mbx_cmd) goto idr_err; memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL); if (dev->id < 0) goto idr_err; status = ocrdma_init_hw(dev); if (status) goto init_err; status = ocrdma_alloc_resources(dev); if (status) goto alloc_err; ocrdma_init_service_level(dev); ocrdma_init_gid_table(dev); status = ocrdma_register_device(dev); if (status) goto alloc_err; for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i])) goto sysfs_err; spin_lock(&ocrdma_devlist_lock); list_add_tail_rcu(&dev->entry, &ocrdma_dev_list); spin_unlock(&ocrdma_devlist_lock); /* Init stats */ ocrdma_add_port_stats(dev); /* Interrupt Moderation */ INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); pr_info("%s %s: %s \"%s\" port %d\n", dev_name(&dev->nic_info.pdev->dev), hca_name(dev), port_speed_string(dev), dev->model_number, dev->hba_port_num); pr_info("%s ocrdma%d driver loaded successfully\n", dev_name(&dev->nic_info.pdev->dev), dev->id); return dev; sysfs_err: ocrdma_remove_sysfiles(dev); alloc_err: ocrdma_free_resources(dev); ocrdma_cleanup_hw(dev); init_err: idr_remove(&ocrdma_dev_id, dev->id); idr_err: kfree(dev->mbx_cmd); ib_dealloc_device(&dev->ibdev); pr_err("%s() leaving. ret=%d\n", __func__, status); return NULL; } static void ocrdma_remove_free(struct rcu_head *rcu) { struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu); idr_remove(&ocrdma_dev_id, dev->id); kfree(dev->mbx_cmd); ib_dealloc_device(&dev->ibdev); } static void ocrdma_remove(struct ocrdma_dev *dev) { /* first unregister with stack to stop all the active traffic * of the registered clients. */ cancel_delayed_work_sync(&dev->eqd_work); ocrdma_remove_sysfiles(dev); ib_unregister_device(&dev->ibdev); ocrdma_rem_port_stats(dev); spin_lock(&ocrdma_devlist_lock); list_del_rcu(&dev->entry); spin_unlock(&ocrdma_devlist_lock); ocrdma_free_resources(dev); ocrdma_cleanup_hw(dev); call_rcu(&dev->rcu, ocrdma_remove_free); } static int ocrdma_open(struct ocrdma_dev *dev) { struct ib_event port_event; port_event.event = IB_EVENT_PORT_ACTIVE; port_event.element.port_num = 1; port_event.device = &dev->ibdev; ib_dispatch_event(&port_event); return 0; } static int ocrdma_close(struct ocrdma_dev *dev) { int i; struct ocrdma_qp *qp, **cur_qp; struct ib_event err_event; struct ib_qp_attr attrs; int attr_mask = IB_QP_STATE; attrs.qp_state = IB_QPS_ERR; mutex_lock(&dev->dev_lock); if (dev->qp_tbl) { cur_qp = dev->qp_tbl; for (i = 0; i < OCRDMA_MAX_QP; i++) { qp = cur_qp[i]; if (qp && qp->ibqp.qp_type != IB_QPT_GSI) { /* change the QP state to ERROR */ _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask); err_event.event = IB_EVENT_QP_FATAL; err_event.element.qp = &qp->ibqp; err_event.device = &dev->ibdev; ib_dispatch_event(&err_event); } } } mutex_unlock(&dev->dev_lock); err_event.event = IB_EVENT_PORT_ERR; err_event.element.port_num = 1; err_event.device = &dev->ibdev; ib_dispatch_event(&err_event); return 0; } static void ocrdma_shutdown(struct ocrdma_dev *dev) { ocrdma_close(dev); ocrdma_remove(dev); } /* event handling via NIC driver ensures that all the NIC specific * initialization done before RoCE driver notifies * event to stack. */ static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) { switch (event) { case BE_DEV_UP: ocrdma_open(dev); break; case BE_DEV_DOWN: ocrdma_close(dev); break; case BE_DEV_SHUTDOWN: ocrdma_shutdown(dev); break; } } static struct ocrdma_driver ocrdma_drv = { .name = "ocrdma_driver", .add = ocrdma_add, .remove = ocrdma_remove, .state_change_handler = ocrdma_event_handler, .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, }; static void ocrdma_unregister_inet6addr_notifier(void) { #if IS_ENABLED(CONFIG_IPV6) unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier); #endif } static void ocrdma_unregister_inetaddr_notifier(void) { unregister_inetaddr_notifier(&ocrdma_inetaddr_notifier); } static int __init ocrdma_init_module(void) { int status; ocrdma_init_debugfs(); status = register_inetaddr_notifier(&ocrdma_inetaddr_notifier); if (status) return status; #if IS_ENABLED(CONFIG_IPV6) status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier); if (status) goto err_notifier6; #endif status = be_roce_register_driver(&ocrdma_drv); if (status) goto err_be_reg; return 0; err_be_reg: #if IS_ENABLED(CONFIG_IPV6) ocrdma_unregister_inet6addr_notifier(); err_notifier6: #endif ocrdma_unregister_inetaddr_notifier(); return status; } static void __exit ocrdma_exit_module(void) { be_roce_unregister_driver(&ocrdma_drv); ocrdma_unregister_inet6addr_notifier(); ocrdma_unregister_inetaddr_notifier(); ocrdma_rem_debugfs(); } module_init(ocrdma_init_module); module_exit(ocrdma_exit_module);