linux/drivers/infiniband/sw/rdmavt/vt.c

// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Copyright(c) 2016 - 2018 Intel Corporation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include "vt.h"
#include "cq.h"
#include "trace.h"

#define RVT_UVERBS_ABI_VERSION …

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;

static int __init rvt_init(void)
{ … }
module_init(…) …;

static void __exit rvt_cleanup(void)
{ … }
module_exit(rvt_cleanup);

/**
 * rvt_alloc_device - allocate rdi
 * @size: how big of a structure to allocate
 * @nports: number of ports to allocate array slots for
 *
 * Use IB core device alloc to allocate space for the rdi which is assumed to be
 * inside of the ib_device. Any extra space that drivers require should be
 * included in size.
 *
 * We also allocate a port array based on the number of ports.
 *
 * Return: pointer to allocated rdi
 */
struct rvt_dev_info *rvt_alloc_device(size_t size, int nports)
{ … }
EXPORT_SYMBOL(…);

/**
 * rvt_dealloc_device - deallocate rdi
 * @rdi: structure to free
 *
 * Free a structure allocated with rvt_alloc_device()
 */
void rvt_dealloc_device(struct rvt_dev_info *rdi)
{ … }
EXPORT_SYMBOL(…);

static int rvt_query_device(struct ib_device *ibdev,
			    struct ib_device_attr *props,
			    struct ib_udata *uhw)
{ … }

static int rvt_get_numa_node(struct ib_device *ibdev)
{ … }

static int rvt_modify_device(struct ib_device *device,
			     int device_modify_mask,
			     struct ib_device_modify *device_modify)
{ … }

/**
 * rvt_query_port - Passes the query port call to the driver
 * @ibdev: Verbs IB dev
 * @port_num: port number, 1 based from ib core
 * @props: structure to hold returned properties
 *
 * Return: 0 on success
 */
static int rvt_query_port(struct ib_device *ibdev, u32 port_num,
			  struct ib_port_attr *props)
{ … }

/**
 * rvt_modify_port - modify port
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @port_modify_mask: How to change the port
 * @props: Structure to fill in
 *
 * Return: 0 on success
 */
static int rvt_modify_port(struct ib_device *ibdev, u32 port_num,
			   int port_modify_mask, struct ib_port_modify *props)
{ … }

/**
 * rvt_query_pkey - Return a pkey from the table at a given index
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @index: Index into pkey table
 * @pkey: returned pkey from the port pkey table
 *
 * Return: 0 on failure pkey otherwise
 */
static int rvt_query_pkey(struct ib_device *ibdev, u32 port_num, u16 index,
			  u16 *pkey)
{ … }

/**
 * rvt_query_gid - Return a gid from the table
 * @ibdev: Verbs IB dev
 * @port_num: Port number, 1 based from ib core
 * @guid_index: Index in table
 * @gid: Gid to return
 *
 * Return: 0 on success
 */
static int rvt_query_gid(struct ib_device *ibdev, u32 port_num,
			 int guid_index, union ib_gid *gid)
{ … }

/**
 * rvt_alloc_ucontext - Allocate a user context
 * @uctx: Verbs context
 * @udata: User data allocated
 */
static int rvt_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
{ … }

/**
 * rvt_dealloc_ucontext - Free a user context
 * @context: Unused
 */
static void rvt_dealloc_ucontext(struct ib_ucontext *context)
{ … }

static int rvt_get_port_immutable(struct ib_device *ibdev, u32 port_num,
				  struct ib_port_immutable *immutable)
{ … }

enum { … };

static const struct ib_device_ops rvt_dev_ops = …;

static noinline int check_support(struct rvt_dev_info *rdi, int verb)
{ … }

/**
 * rvt_register_device - register a driver
 * @rdi: main dev structure for all of rdmavt operations
 *
 * It is up to drivers to allocate the rdi and fill in the appropriate
 * information.
 *
 * Return: 0 on success otherwise an errno.
 */
int rvt_register_device(struct rvt_dev_info *rdi)
{ … }
EXPORT_SYMBOL(…);

/**
 * rvt_unregister_device - remove a driver
 * @rdi: rvt dev struct
 */
void rvt_unregister_device(struct rvt_dev_info *rdi)
{ … }
EXPORT_SYMBOL(…);

/**
 * rvt_init_port - init internal data for driver port
 * @rdi: rvt_dev_info struct
 * @port: rvt port
 * @port_index: 0 based index of ports, different from IB core port num
 * @pkey_table: pkey_table for @port
 *
 * Keep track of a list of ports. No need to have a detach port.
 * They persist until the driver goes away.
 *
 * Return: always 0
 */
int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
		  int port_index, u16 *pkey_table)
{ … }
EXPORT_SYMBOL(…);