| /* This file is part of the Emulex RoCE Device Driver for |
| * RoCE (RDMA over Converged Ethernet) adapters. |
| * Copyright (C) 2012-2015 Emulex. All rights reserved. |
| * EMULEX and SLI are trademarks of Emulex. |
| * www.emulex.com |
| * |
| * 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 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. |
| * |
| * 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 HOLDER 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. |
| * |
| * Contact Information: |
| * linux-drivers@emulex.com |
| * |
| * Emulex |
| * 3333 Susan Street |
| * Costa Mesa, CA 92626 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/idr.h> |
| #include <rdma/ib_verbs.h> |
| #include <rdma/ib_user_verbs.h> |
| #include <rdma/ib_addr.h> |
| #include <rdma/ib_mad.h> |
| |
| #include <linux/netdevice.h> |
| #include <net/addrconf.h> |
| |
| #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("Dual BSD/GPL"); |
| |
| static LIST_HEAD(ocrdma_dev_list); |
| static DEFINE_SPINLOCK(ocrdma_devlist_lock); |
| static DEFINE_IDR(ocrdma_dev_id); |
| |
| 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 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_netdev = ocrdma_get_netdev; |
| dev->ibdev.add_gid = ocrdma_add_gid; |
| dev->ibdev.del_gid = ocrdma_del_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_mr = ocrdma_alloc_mr; |
| 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->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); |
| } |
| |
| /* 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 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); |
| 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 int __init ocrdma_init_module(void) |
| { |
| int status; |
| |
| ocrdma_init_debugfs(); |
| |
| status = be_roce_register_driver(&ocrdma_drv); |
| if (status) |
| goto err_be_reg; |
| |
| return 0; |
| |
| err_be_reg: |
| |
| return status; |
| } |
| |
| static void __exit ocrdma_exit_module(void) |
| { |
| be_roce_unregister_driver(&ocrdma_drv); |
| ocrdma_rem_debugfs(); |
| idr_destroy(&ocrdma_dev_id); |
| } |
| |
| module_init(ocrdma_init_module); |
| module_exit(ocrdma_exit_module); |