drivers/infiniband/sw/rxe/rxe.c - linux - Git at Google

 // 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);

 	mutex_destroy(&rxe->usdev_lock);
 }

 /* 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 *rxe;
 	int err = 0;

 	if (is_vlan_dev(ndev)) {
 		rxe_err("rxe creation allowed on top of a real device only\n");
 		err = -EPERM;
 		goto err;
 	}

 	rxe = rxe_get_dev_from_net(ndev);
 	if (rxe) {
 		ib_device_put(&rxe->ib_dev);
 		rxe_err_dev(rxe, "already configured on %s\n", ndev->name);
 		err = -EEXIST;
 		goto err;
 	}

 	err = rxe_net_add(ibdev_name, ndev);
 	if (err) {
 		rxe_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_alloc_wq();
 	if (err)
 		return err;

 	err = rxe_net_init();
 	if (err) {
 		rxe_destroy_wq();
 		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();
 	rxe_destroy_wq();

 	pr_info("unloaded\n");
 }

 late_initcall(rxe_module_init);
 module_exit(rxe_module_exit);

 MODULE_ALIAS_RDMA_LINK("rxe");
	// 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);

	mutex_destroy(&rxe->usdev_lock);
	}

	/* 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 *rxe;
	int err = 0;

	if (is_vlan_dev(ndev)) {
	rxe_err("rxe creation allowed on top of a real device only\n");
	err = -EPERM;
	goto err;
	}

	rxe = rxe_get_dev_from_net(ndev);
	if (rxe) {
	ib_device_put(&rxe->ib_dev);
	rxe_err_dev(rxe, "already configured on %s\n", ndev->name);
	err = -EEXIST;
	goto err;
	}

	err = rxe_net_add(ibdev_name, ndev);
	if (err) {
	rxe_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_alloc_wq();
	if (err)
	return err;

	err = rxe_net_init();
	if (err) {
	rxe_destroy_wq();
	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();
	rxe_destroy_wq();

	pr_info("unloaded\n");
	}

	late_initcall(rxe_module_init);
	module_exit(rxe_module_exit);

	MODULE_ALIAS_RDMA_LINK("rxe");