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// 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");
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