diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c new file mode 100644 index 000000000..51daac5c4 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#include <rdma/rdma_netlink.h> +#include <net/addrconf.h> +#include "rxe.h" +#include "rxe_loc.h" + +MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib"); +MODULE_DESCRIPTION("Soft RDMA transport"); +MODULE_LICENSE("Dual BSD/GPL"); + +/* free resources for a rxe device all objects created for this device must + * have been destroyed + */ +void rxe_dealloc(struct ib_device *ib_dev) +{ + struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); + + rxe_pool_cleanup(&rxe->uc_pool); + rxe_pool_cleanup(&rxe->pd_pool); + rxe_pool_cleanup(&rxe->ah_pool); + rxe_pool_cleanup(&rxe->srq_pool); + rxe_pool_cleanup(&rxe->qp_pool); + rxe_pool_cleanup(&rxe->cq_pool); + rxe_pool_cleanup(&rxe->mr_pool); + rxe_pool_cleanup(&rxe->mw_pool); + + WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree)); + + if (rxe->tfm) + crypto_free_shash(rxe->tfm); +} + +/* initialize rxe device parameters */ +static void rxe_init_device_param(struct rxe_dev *rxe) +{ + rxe->max_inline_data = RXE_MAX_INLINE_DATA; + + rxe->attr.vendor_id = RXE_VENDOR_ID; + rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; + rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; + rxe->attr.max_qp = RXE_MAX_QP; + rxe->attr.max_qp_wr = RXE_MAX_QP_WR; + rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; + rxe->attr.kernel_cap_flags = IBK_ALLOW_USER_UNREG; + rxe->attr.max_send_sge = RXE_MAX_SGE; + rxe->attr.max_recv_sge = RXE_MAX_SGE; + rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; + rxe->attr.max_cq = RXE_MAX_CQ; + rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; + rxe->attr.max_mr = RXE_MAX_MR; + rxe->attr.max_mw = RXE_MAX_MW; + rxe->attr.max_pd = RXE_MAX_PD; + rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; + rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; + rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; + rxe->attr.atomic_cap = IB_ATOMIC_HCA; + rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; + rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; + rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; + rxe->attr.max_ah = RXE_MAX_AH; + rxe->attr.max_srq = RXE_MAX_SRQ; + rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; + rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; + rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; + rxe->attr.max_pkeys = RXE_MAX_PKEYS; + rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; + addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, + rxe->ndev->dev_addr); + + rxe->max_ucontext = RXE_MAX_UCONTEXT; +} + +/* initialize port attributes */ +static void rxe_init_port_param(struct rxe_port *port) +{ + port->attr.state = IB_PORT_DOWN; + port->attr.max_mtu = IB_MTU_4096; + port->attr.active_mtu = IB_MTU_256; + port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; + port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; + port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; + port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; + port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; + port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; + port->attr.lid = RXE_PORT_LID; + port->attr.sm_lid = RXE_PORT_SM_LID; + port->attr.lmc = RXE_PORT_LMC; + port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; + port->attr.sm_sl = RXE_PORT_SM_SL; + port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; + port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; + port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; + port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; + port->attr.phys_state = RXE_PORT_PHYS_STATE; + port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); + port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); +} + +/* initialize port state, note IB convention that HCA ports are always + * numbered from 1 + */ +static void rxe_init_ports(struct rxe_dev *rxe) +{ + struct rxe_port *port = &rxe->port; + + rxe_init_port_param(port); + addrconf_addr_eui48((unsigned char *)&port->port_guid, + rxe->ndev->dev_addr); + spin_lock_init(&port->port_lock); +} + +/* init pools of managed objects */ +static void rxe_init_pools(struct rxe_dev *rxe) +{ + rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); + rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); + rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); + rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); + rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); + rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); + rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); + rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); +} + +/* initialize rxe device state */ +static void rxe_init(struct rxe_dev *rxe) +{ + /* init default device parameters */ + rxe_init_device_param(rxe); + + rxe_init_ports(rxe); + rxe_init_pools(rxe); + + /* init pending mmap list */ + spin_lock_init(&rxe->mmap_offset_lock); + spin_lock_init(&rxe->pending_lock); + INIT_LIST_HEAD(&rxe->pending_mmaps); + + /* init multicast support */ + spin_lock_init(&rxe->mcg_lock); + rxe->mcg_tree = RB_ROOT; + + mutex_init(&rxe->usdev_lock); +} + +void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) +{ + struct rxe_port *port = &rxe->port; + enum ib_mtu mtu; + + mtu = eth_mtu_int_to_enum(ndev_mtu); + + /* Make sure that new MTU in range */ + mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; + + port->attr.active_mtu = mtu; + port->mtu_cap = ib_mtu_enum_to_int(mtu); +} + +/* called by ifc layer to create new rxe device. + * The caller should allocate memory for rxe by calling ib_alloc_device. + */ +int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) +{ + rxe_init(rxe); + rxe_set_mtu(rxe, mtu); + + return rxe_register_device(rxe, ibdev_name); +} + +static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) +{ + struct rxe_dev *exists; + int err = 0; + + if (is_vlan_dev(ndev)) { + pr_err("rxe creation allowed on top of a real device only\n"); + err = -EPERM; + goto err; + } + + exists = rxe_get_dev_from_net(ndev); + if (exists) { + ib_device_put(&exists->ib_dev); + pr_err("already configured on %s\n", ndev->name); + err = -EEXIST; + goto err; + } + + err = rxe_net_add(ibdev_name, ndev); + if (err) { + pr_err("failed to add %s\n", ndev->name); + goto err; + } +err: + return err; +} + +static struct rdma_link_ops rxe_link_ops = { + .type = "rxe", + .newlink = rxe_newlink, +}; + +static int __init rxe_module_init(void) +{ + int err; + + err = rxe_net_init(); + if (err) + return err; + + rdma_link_register(&rxe_link_ops); + pr_info("loaded\n"); + return 0; +} + +static void __exit rxe_module_exit(void) +{ + rdma_link_unregister(&rxe_link_ops); + ib_unregister_driver(RDMA_DRIVER_RXE); + rxe_net_exit(); + + pr_info("unloaded\n"); +} + +late_initcall(rxe_module_init); +module_exit(rxe_module_exit); + +MODULE_ALIAS_RDMA_LINK("rxe"); |