drivers/infiniband/sw/rxe/rxe.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/sw/rxe/rxe.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/sw/rxe/rxe.c
Extension
.c
Size
8881 bytes
Lines
309
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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"
#include "rxe_net.h"
#include "rxe_ns.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));

	mutex_destroy(&rxe->usdev_lock);
}

static const struct ib_device_ops rxe_ib_dev_odp_ops = {
	.advise_mr = rxe_ib_advise_mr,
};

/* initialize rxe device parameters */
static void rxe_init_device_param(struct rxe_dev *rxe, struct net_device *ndev)
{
	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;

	if (ndev->addr_len) {
		memcpy(rxe->raw_gid, ndev->dev_addr,
			min_t(unsigned int, ndev->addr_len, ETH_ALEN));
	} else {
		/*
		 * This device does not have a HW address, but
		 * connection management requires a unique gid.
		 */
		eth_random_addr(rxe->raw_gid);
	}

	addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
			rxe->raw_gid);

Annotation

Implementation Notes