diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/ocrdma/ocrdma_main.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c new file mode 100644 index 000000000..5d4b3bc16 --- /dev/null +++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c @@ -0,0 +1,432 @@ +/* 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 <rdma/ocrdma-abi.h> + +MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION); +MODULE_AUTHOR("Emulex Corporation"); +MODULE_LICENSE("Dual BSD/GPL"); + +static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, + u32 port_num) +{ + return IB_LINK_LAYER_ETHERNET; +} + +static int ocrdma_port_immutable(struct ib_device *ibdev, u32 port_num, + struct ib_port_immutable *immutable) +{ + struct ib_port_attr attr; + struct ocrdma_dev *dev; + int err; + + dev = get_ocrdma_dev(ibdev); + immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; + if (ocrdma_is_udp_encap_supported(dev)) + immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; + + err = ib_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->max_mad_size = IB_MGMT_MAD_SIZE; + + return 0; +} + +static void get_dev_fw_str(struct ib_device *device, char *str) +{ + struct ocrdma_dev *dev = get_ocrdma_dev(device); + + snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]); +} + +/* OCRDMA sysfs interface */ +static ssize_t hw_rev_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct ocrdma_dev *dev = + rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); + + return sysfs_emit(buf, "0x%x\n", dev->nic_info.pdev->vendor); +} +static DEVICE_ATTR_RO(hw_rev); + +static ssize_t hca_type_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct ocrdma_dev *dev = + rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); + + return sysfs_emit(buf, "%s\n", &dev->model_number[0]); +} +static DEVICE_ATTR_RO(hca_type); + +static struct attribute *ocrdma_attributes[] = { + &dev_attr_hw_rev.attr, + &dev_attr_hca_type.attr, + NULL +}; + +static const struct attribute_group ocrdma_attr_group = { + .attrs = ocrdma_attributes, +}; + +static const struct ib_device_ops ocrdma_dev_ops = { + .owner = THIS_MODULE, + .driver_id = RDMA_DRIVER_OCRDMA, + .uverbs_abi_ver = OCRDMA_ABI_VERSION, + + .alloc_mr = ocrdma_alloc_mr, + .alloc_pd = ocrdma_alloc_pd, + .alloc_ucontext = ocrdma_alloc_ucontext, + .create_ah = ocrdma_create_ah, + .create_cq = ocrdma_create_cq, + .create_qp = ocrdma_create_qp, + .create_user_ah = ocrdma_create_ah, + .dealloc_pd = ocrdma_dealloc_pd, + .dealloc_ucontext = ocrdma_dealloc_ucontext, + .dereg_mr = ocrdma_dereg_mr, + .destroy_ah = ocrdma_destroy_ah, + .destroy_cq = ocrdma_destroy_cq, + .destroy_qp = ocrdma_destroy_qp, + .device_group = &ocrdma_attr_group, + .get_dev_fw_str = get_dev_fw_str, + .get_dma_mr = ocrdma_get_dma_mr, + .get_link_layer = ocrdma_link_layer, + .get_port_immutable = ocrdma_port_immutable, + .map_mr_sg = ocrdma_map_mr_sg, + .mmap = ocrdma_mmap, + .modify_qp = ocrdma_modify_qp, + .poll_cq = ocrdma_poll_cq, + .post_recv = ocrdma_post_recv, + .post_send = ocrdma_post_send, + .process_mad = ocrdma_process_mad, + .query_ah = ocrdma_query_ah, + .query_device = ocrdma_query_device, + .query_pkey = ocrdma_query_pkey, + .query_port = ocrdma_query_port, + .query_qp = ocrdma_query_qp, + .reg_user_mr = ocrdma_reg_user_mr, + .req_notify_cq = ocrdma_arm_cq, + .resize_cq = ocrdma_resize_cq, + + INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah), + INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq), + INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd), + INIT_RDMA_OBJ_SIZE(ib_qp, ocrdma_qp, ibqp), + INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext), +}; + +static const struct ib_device_ops ocrdma_dev_srq_ops = { + .create_srq = ocrdma_create_srq, + .destroy_srq = ocrdma_destroy_srq, + .modify_srq = ocrdma_modify_srq, + .post_srq_recv = ocrdma_post_srq_recv, + .query_srq = ocrdma_query_srq, + + INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq), +}; + +static int ocrdma_register_device(struct ocrdma_dev *dev) +{ + int ret; + + addrconf_addr_eui48((u8 *)&dev->ibdev.node_guid, + dev->nic_info.mac_addr); + BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); + memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, + sizeof(OCRDMA_NODE_DESC)); + + dev->ibdev.node_type = RDMA_NODE_IB_CA; + dev->ibdev.phys_port_cnt = 1; + dev->ibdev.num_comp_vectors = dev->eq_cnt; + + /* mandatory to support user space verbs consumer. */ + dev->ibdev.dev.parent = &dev->nic_info.pdev->dev; + + ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops); + + if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) + ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops); + + ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1); + if (ret) + return ret; + + dma_set_max_seg_size(&dev->nic_info.pdev->dev, UINT_MAX); + return ib_register_device(&dev->ibdev, "ocrdma%d", + &dev->nic_info.pdev->dev); +} + +static int ocrdma_alloc_resources(struct ocrdma_dev *dev) +{ + mutex_init(&dev->dev_lock); + dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *), + GFP_KERNEL); + if (!dev->cq_tbl) + goto alloc_err; + + if (dev->attr.max_qp) { + dev->qp_tbl = kcalloc(OCRDMA_MAX_QP, + sizeof(struct ocrdma_qp *), + GFP_KERNEL); + if (!dev->qp_tbl) + goto alloc_err; + } + + dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL); + if (dev->stag_arr == NULL) + goto alloc_err; + + ocrdma_alloc_pd_pool(dev); + + if (!ocrdma_alloc_stats_resources(dev)) { + pr_err("%s: stats resource allocation failed\n", __func__); + goto alloc_err; + } + + 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) +{ + ocrdma_release_stats_resources(dev); + kfree(dev->stag_arr); + kfree(dev->qp_tbl); + kfree(dev->cq_tbl); +} + +static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) +{ + int status = 0; + u8 lstate = 0; + struct ocrdma_dev *dev; + + dev = ib_alloc_device(ocrdma_dev, ibdev); + 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 init_err; + + memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); + dev->id = PCI_FUNC(dev->nic_info.pdev->devfn); + 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; + + /* Query Link state and update */ + status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); + if (!status) + ocrdma_update_link_state(dev, lstate); + + /* 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; + +alloc_err: + ocrdma_free_resources(dev); + ocrdma_cleanup_hw(dev); +init_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 ocrdma_dev *dev) +{ + + 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); + ib_unregister_device(&dev->ibdev); + + ocrdma_rem_port_stats(dev); + ocrdma_free_resources(dev); + ocrdma_cleanup_hw(dev); + ocrdma_remove_free(dev); +} + +static int ocrdma_dispatch_port_active(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_dispatch_port_error(struct ocrdma_dev *dev) +{ + struct ib_event err_event; + + 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_dispatch_port_error(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_SHUTDOWN: + ocrdma_shutdown(dev); + break; + default: + break; + } +} + +void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) +{ + if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { + dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; + if (!lstate) + return; + } + + if (!lstate) + ocrdma_dispatch_port_error(dev); + else + ocrdma_dispatch_port_active(dev); +} + +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(); +} + +module_init(ocrdma_init_module); +module_exit(ocrdma_exit_module); |