/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <rdma/rdma_netlink.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_cache.h>
#include "core_priv.h"
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("core kernel InfiniBand API");
MODULE_LICENSE("Dual BSD/GPL");
struct ib_client_data {
struct list_head list;
struct ib_client *client;
void * data;
/* The device or client is going down. Do not call client or device
* callbacks other than remove(). */
bool going_down;
};
struct workqueue_struct *ib_wq;
EXPORT_SYMBOL_GPL(ib_wq);
/* The device_list and client_list contain devices and clients after their
* registration has completed, and the devices and clients are removed
* during unregistration. */
static LIST_HEAD(device_list);
static LIST_HEAD(client_list);
/*
* device_mutex and lists_rwsem protect access to both device_list and
* client_list. device_mutex protects writer access by device and client
* registration / de-registration. lists_rwsem protects reader access to
* these lists. Iterators of these lists must lock it for read, while updates
* to the lists must be done with a write lock. A special case is when the
* device_mutex is locked. In this case locking the lists for read access is
* not necessary as the device_mutex implies it.
*
* lists_rwsem also protects access to the client data list.
*/
static DEFINE_MUTEX(device_mutex);
static DECLARE_RWSEM(lists_rwsem);
static int ib_device_check_mandatory(struct ib_device *device)
{
#define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
static const struct {
size_t offset;
char *name;
} mandatory_table[] = {
IB_MANDATORY_FUNC(query_device),
IB_MANDATORY_FUNC(query_port),
IB_MANDATORY_FUNC(query_pkey),
IB_MANDATORY_FUNC(query_gid),
IB_MANDATORY_FUNC(alloc_pd),
IB_MANDATORY_FUNC(dealloc_pd),
IB_MANDATORY_FUNC(create_ah),
IB_MANDATORY_FUNC(destroy_ah),
IB_MANDATORY_FUNC(create_qp),
IB_MANDATORY_FUNC(modify_qp),
IB_MANDATORY_FUNC(destroy_qp),
IB_MANDATORY_FUNC(post_send),
IB_MANDATORY_FUNC(post_recv),
IB_MANDATORY_FUNC(create_cq),
IB_MANDATORY_FUNC(destroy_cq),
IB_MANDATORY_FUNC(poll_cq),
IB_MANDATORY_FUNC(req_notify_cq),
IB_MANDATORY_FUNC(get_dma_mr),
IB_MANDATORY_FUNC(dereg_mr),
IB_MANDATORY_FUNC(get_port_immutable)
};
int i;
for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
if (!*(void **) ((void *) device + mandatory_table[i].offset)) {
printk(KERN_WARNING "Device %s is missing mandatory function %s\n",
device->name, mandatory_table[i].name);
return -EINVAL;
}
}
return 0;
}
static struct ib_device *__ib_device_get_by_name(const char *name)
{
struct ib_device *device;
list_for_each_entry(device, &device_list, core_list)
if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX))
return device;
return NULL;
}
static int alloc_name(char *name)
{
unsigned long *inuse;
char buf[IB_DEVICE_NAME_MAX];
struct ib_device *device;
int i;
inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL);
if (!inuse)
return -ENOMEM;
list_for_each_entry(device, &device_list, core_list) {
if (!sscanf(device->name, name, &i))
continue;
if (i < 0 || i >= PAGE_SIZE * 8)
continue;
snprintf(buf, sizeof buf, name, i);
if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX))
set_bit(i, inuse);
}
i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
free_page((unsigned long) inuse);
snprintf(buf, sizeof buf, name, i);
if (__ib_device_get_by_name(buf))
return -ENFILE;
strlcpy(name, buf, IB_DEVICE_NAME_MAX);
return 0;
}
static void ib_device_release(struct device *device)
{
struct ib_device *dev = container_of(device, struct ib_device, dev);
ib_cache_release_one(dev);
kfree(dev->port_immutable);
kfree(dev);
}
static int ib_device_uevent(struct device *device,
struct kobj_uevent_env *env)
{
struct ib_device *dev = container_of(device, struct ib_device, dev);
if (add_uevent_var(env, "NAME=%s", dev->name))
return -ENOMEM;
/*
* It would be nice to pass the node GUID with the event...
*/
return 0;
}
static struct class ib_class = {
.name = "infiniband",
.dev_release = ib_device_release,
.dev_uevent = ib_device_uevent,
};
/**
* ib_alloc_device - allocate an IB device struct
* @size:size of structure to allocate
*
* Low-level drivers should use ib_alloc_device() to allocate &struct
* ib_device. @size is the size of the structure to be allocated,
* including any private data used by the low-level driver.
* ib_dealloc_device() must be used to free structures allocated with
* ib_alloc_device().
*/
struct ib_device *ib_alloc_device(size_t size)
{
struct ib_device *device;
if (WARN_ON(size < sizeof(struct ib_device)))
return NULL;
device = kzalloc(size, GFP_KERNEL);
if (!device)
return NULL;
device->dev.class = &ib_class;
device_initialize(&device->dev);
dev_set_drvdata(&device->dev, device);
INIT_LIST_HEAD(&device->event_handler_list);
spin_lock_init(&device->event_handler_lock);
spin_lock_init(&device->client_data_lock);
INIT_LIST_HEAD(&device->client_data_list);
INIT_LIST_HEAD(&device->port_list);
return device;
}
EXPORT_SYMBOL(ib_alloc_device);
/**
* ib_dealloc_device - free an IB device struct
* @device:structure to free
*
* Free a structure allocated with ib_alloc_device().
*/
void ib_dealloc_device(struct ib_device *device)
{
WARN_ON(device->reg_state != IB_DEV_UNREGISTERED &&
device->reg_state != IB_DEV_UNINITIALIZED);
kobject_put(&device->dev.kobj);
}
EXPORT_SYMBOL(ib_dealloc_device);
static int add_client_context(struct ib_device *device, struct ib_client *client)
{
struct ib_client_data *context;
unsigned long flags;
context = kmalloc(sizeof *context, GFP_KERNEL);
if (!context) {
printk(KERN_WARNING "Couldn't allocate client context for %s/%s\n",
device->name, client->name);
return -ENOMEM;
}
context->client = client;
context->data = NULL;
context->going_down = false;
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
list_add(&context->list, &device->client_data_list);
spin_unlock_irqrestore(&device->client_data_lock, flags);
up_write(&lists_rwsem);
return 0;
}
static int verify_immutable(const struct ib_device *dev, u8 port)
{
return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
rdma_max_mad_size(dev, port) != 0);
}
static int read_port_immutable(struct ib_device *device)
{
int ret;
u8 start_port = rdma_start_port(device);
u8 end_port = rdma_end_port(device);
u8 port;
/**
* device->port_immutable is indexed directly by the port number to make
* access to this data as efficient as possible.
*
* Therefore port_immutable is declared as a 1 based array with
* potential empty slots at the beginning.
*/
device->port_immutable = kzalloc(sizeof(*device->port_immutable)
* (end_port + 1),
GFP_KERNEL);
if (!device->port_immutable)
return -ENOMEM;
for (port = start_port; port <= end_port; ++port) {
ret = device->get_port_immutable(device, port,
&device->port_immutable[port]);
if (ret)
return ret;
if (verify_immutable(device, port))
return -EINVAL;
}
return 0;
}
/**
* ib_register_device - Register an IB device with IB core
* @device:Device to register
*
* Low-level drivers use ib_register_device() to register their
* devices with the IB core. All registered clients will receive a
* callback for each device that is added. @device must be allocated
* with ib_alloc_device().
*/
int ib_register_device(struct ib_device *device,
int (*port_callback)(struct ib_device *,
u8, struct kobject *))
{
int ret;
struct ib_client *client;
mutex_lock(&device_mutex);
if (strchr(device->name, '%')) {
ret = alloc_name(device->name);
if (ret)
goto out;
}
if (ib_device_check_mandatory(device)) {
ret = -EINVAL;
goto out;
}
ret = read_port_immutable(device);
if (ret) {
printk(KERN_WARNING "Couldn't create per port immutable data %s\n",
device->name);
goto out;
}
ret = ib_cache_setup_one(device);
if (ret) {
printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n");
goto out;
}
ret = ib_device_register_sysfs(device, port_callback);
if (ret) {
printk(KERN_WARNING "Couldn't register device %s with driver model\n",
device->name);
ib_cache_cleanup_one(device);
goto out;
}
device->reg_state = IB_DEV_REGISTERED;
list_for_each_entry(client, &client_list, list)
if (client->add && !add_client_context(device, client))
client->add(device);
down_write(&lists_rwsem);
list_add_tail(&device->core_list, &device_list);
up_write(&lists_rwsem);
out:
mutex_unlock(&device_mutex);
return ret;
}
EXPORT_SYMBOL(ib_register_device);
/**
* ib_unregister_device - Unregister an IB device
* @device:Device to unregister
*
* Unregister an IB device. All clients will receive a remove callback.
*/
void ib_unregister_device(struct ib_device *device)
{
struct ib_client_data *context, *tmp;
unsigned long flags;
mutex_lock(&device_mutex);
down_write(&lists_rwsem);
list_del(&device->core_list);
spin_lock_irqsave(&device->client_data_lock, flags);
list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
context->going_down = true;
spin_unlock_irqrestore(&device->client_data_lock, flags);
downgrade_write(&lists_rwsem);
list_for_each_entry_safe(context, tmp, &device->client_data_list,
list) {
if (context->client->remove)
context->client->remove(device, context->data);
}
up_read(&lists_rwsem);
mutex_unlock(&device_mutex);
ib_device_unregister_sysfs(device);
ib_cache_cleanup_one(device);
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
kfree(context);
spin_unlock_irqrestore(&device->client_data_lock, flags);
up_write(&lists_rwsem);
device->reg_state = IB_DEV_UNREGISTERED;
}
EXPORT_SYMBOL(ib_unregister_device);
/**
* ib_register_client - Register an IB client
* @client:Client to register
*
* Upper level users of the IB drivers can use ib_register_client() to
* register callbacks for IB device addition and removal. When an IB
* device is added, each registered client's add method will be called
* (in the order the clients were registered), and when a device is
* removed, each client's remove method will be called (in the reverse
* order that clients were registered). In addition, when
* ib_register_client() is called, the client will receive an add
* callback for all devices already registered.
*/
int ib_register_client(struct ib_client *client)
{
struct ib_device *device;
mutex_lock(&device_mutex);
list_for_each_entry(device, &device_list, core_list)
if (client->add && !add_client_context(device, client))
client->add(device);
down_write(&lists_rwsem);
list_add_tail(&client->list, &client_list);
up_write(&lists_rwsem);
mutex_unlock(&device_mutex);
return 0;
}
EXPORT_SYMBOL(ib_register_client);
/**
* ib_unregister_client - Unregister an IB client
* @client:Client to unregister
*
* Upper level users use ib_unregister_client() to remove their client
* registration. When ib_unregister_client() is called, the client
* will receive a remove callback for each IB device still registered.
*/
void ib_unregister_client(struct ib_client *client)
{
struct ib_client_data *context, *tmp;
struct ib_device *device;
unsigned long flags;
mutex_lock(&device_mutex);
down_write(&lists_rwsem);
list_del(&client->list);
up_write(&lists_rwsem);
list_for_each_entry(device, &device_list, core_list) {
struct ib_client_data *found_context = NULL;
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
list_for_each_entry_safe(context, tmp, &device->client_data_list, list)
if (context->client == client) {
context->going_down = true;
found_context = context;
break;
}
spin_unlock_irqrestore(&device->client_data_lock, flags);
up_write(&lists_rwsem);
if (client->remove)
client->remove(device, found_context ?
found_context->data : NULL);
if (!found_context) {
pr_warn("No client context found for %s/%s\n",
device->name, client->name);
continue;
}
down_write(&lists_rwsem);
spin_lock_irqsave(&device->client_data_lock, flags);
list_del(&found_context->list);
kfree(found_context);
spin_unlock_irqrestore(&device->client_data_lock, flags);
up_write(&lists_rwsem);
}
mutex_unlock(&device_mutex);
}
EXPORT_SYMBOL(ib_unregister_client);
/**
* ib_get_client_data - Get IB client context
* @device:Device to get context for
* @client:Client to get context for
*
* ib_get_client_data() returns client context set with
* ib_set_client_data().
*/
void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
{
struct ib_client_data *context;
void *ret = NULL;
unsigned long flags;
spin_lock_irqsave(&device->client_data_lock, flags);
list_for_each_entry(context, &device->client_data_list, list)
if (context->client == client) {
ret = context->data;
break;
}
spin_unlock_irqrestore(&device->client_data_lock, flags);
return ret;
}
EXPORT_SYMBOL(ib_get_client_data);
/**
* ib_set_client_data - Set IB client context
* @device:Device to set context for
* @client:Client to set context for
* @data:Context to set
*
* ib_set_client_data() sets client context that can be retrieved with
* ib_get_client_data().
*/
void ib_set_client_data(struct ib_device *device, struct ib_client *client,
void *data)
{
struct ib_client_data *context;
unsigned long flags;
spin_lock_irqsave(&device->client_data_lock, flags);
list_for_each_entry(context, &device->client_data_list, list)
if (context->client == client) {
context->data = data;
goto out;
}
printk(KERN_WARNING "No client context found for %s/%s\n",
device->name, client->name);
out:
spin_unlock_irqrestore(&device->client_data_lock, flags);
}
EXPORT_SYMBOL(ib_set_client_data);
/**
* ib_register_event_handler - Register an IB event handler
* @event_handler:Handler to register
*
* ib_register_event_handler() registers an event handler that will be
* called back when asynchronous IB events occur (as defined in
* chapter 11 of the InfiniBand Architecture Specification). This
* callback may occur in interrupt context.
*/
int ib_register_event_handler (struct ib_event_handler *event_handler)
{
unsigned long flags;
spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
list_add_tail(&event_handler->list,
&event_handler->device->event_handler_list);
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
return 0;
}
EXPORT_SYMBOL(ib_register_event_handler);
/**
* ib_unregister_event_handler - Unregister an event handler
* @event_handler:Handler to unregister
*
* Unregister an event handler registered with
* ib_register_event_handler().
*/
int ib_unregister_event_handler(struct ib_event_handler *event_handler)
{
unsigned long flags;
spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
list_del(&event_handler->list);
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
return 0;
}
EXPORT_SYMBOL(ib_unregister_event_handler);
/**
* ib_dispatch_event - Dispatch an asynchronous event
* @event:Event to dispatch
*
* Low-level drivers must call ib_dispatch_event() to dispatch the
* event to all registered event handlers when an asynchronous event
* occurs.
*/
void ib_dispatch_event(struct ib_event *event)
{
unsigned long flags;
struct ib_event_handler *handler;
spin_lock_irqsave(&event->device->event_handler_lock, flags);
list_for_each_entry(handler, &event->device->event_handler_list, list)
handler->handler(handler, event);
spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
}
EXPORT_SYMBOL(ib_dispatch_event);
/**
* ib_query_device - Query IB device attributes
* @device:Device to query
* @device_attr:Device attributes
*
* ib_query_device() returns the attributes of a device through the
* @device_attr pointer.
*/
int ib_query_device(struct ib_device *device,
struct ib_device_attr *device_attr)
{
struct ib_udata uhw = {.outlen = 0, .inlen = 0};
memset(device_attr, 0, sizeof(*device_attr));
return device->query_device(device, device_attr, &uhw);
}
EXPORT_SYMBOL(ib_query_device);
/**
* ib_query_port - Query IB port attributes
* @device:Device to query
* @port_num:Port number to query
* @port_attr:Port attributes
*
* ib_query_port() returns the attributes of a port through the
* @port_attr pointer.
*/
int ib_query_port(struct ib_device *device,
u8 port_num,
struct ib_port_attr *port_attr)
{
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
return device->query_port(device, port_num, port_attr);
}
EXPORT_SYMBOL(ib_query_port);
/**
* ib_query_gid - Get GID table entry
* @device:Device to query
* @port_num:Port number to query
* @index:GID table index to query
* @gid:Returned GID
* @attr: Returned GID attributes related to this GID index (only in RoCE).
* NULL means ignore.
*
* ib_query_gid() fetches the specified GID table entry.
*/
int ib_query_gid(struct ib_device *device,
u8 port_num, int index, union ib_gid *gid,
struct ib_gid_attr *attr)
{
if (rdma_cap_roce_gid_table(device, port_num))
return ib_get_cached_gid(device, port_num, index, gid, attr);
if (attr)
return -EINVAL;
return device->query_gid(device, port_num, index, gid);
}
EXPORT_SYMBOL(ib_query_gid);
/**
* ib_enum_roce_netdev - enumerate all RoCE ports
* @ib_dev : IB device we want to query
* @filter: Should we call the callback?
* @filter_cookie: Cookie passed to filter
* @cb: Callback to call for each found RoCE ports
* @cookie: Cookie passed back to the callback
*
* Enumerates all of the physical RoCE ports of ib_dev
* which are related to netdevice and calls callback() on each
* device for which filter() function returns non zero.
*/
void ib_enum_roce_netdev(struct ib_device *ib_dev,
roce_netdev_filter filter,
void *filter_cookie,
roce_netdev_callback cb,
void *cookie)
{
u8 port;
for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev);
port++)
if (rdma_protocol_roce(ib_dev, port)) {
struct net_device *idev = NULL;
if (ib_dev->get_netdev)
idev = ib_dev->get_netdev(ib_dev, port);
if (idev &&
idev->reg_state >= NETREG_UNREGISTERED) {
dev_put(idev);
idev = NULL;
}
if (filter(ib_dev, port, idev, filter_cookie))
cb(ib_dev, port, idev, cookie);
if (idev)
dev_put(idev);
}
}
/**
* ib_enum_all_roce_netdevs - enumerate all RoCE devices
* @filter: Should we call the callback?
* @filter_cookie: Cookie passed to filter
* @cb: Callback to call for each found RoCE ports
* @cookie: Cookie passed back to the callback
*
* Enumerates all RoCE devices' physical ports which are related
* to netdevices and calls callback() on each device for which
* filter() function returns non zero.
*/
void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
void *filter_cookie,
roce_netdev_callback cb,
void *cookie)
{
struct ib_device *dev;
down_read(&lists_rwsem);
list_for_each_entry(dev, &device_list, core_list)
ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
up_read(&lists_rwsem);
}
/**
* ib_query_pkey - Get P_Key table entry
* @device:Device to query
* @port_num:Port number to query
* @index:P_Key table index to query
* @pkey:Returned P_Key
*
* ib_query_pkey() fetches the specified P_Key table entry.
*/
int ib_query_pkey(struct ib_device *device,
u8 port_num, u16 index, u16 *pkey)
{
return device->query_pkey(device, port_num, index, pkey);
}
EXPORT_SYMBOL(ib_query_pkey);
/**
* ib_modify_device - Change IB device attributes
* @device:Device to modify
* @device_modify_mask:Mask of attributes to change
* @device_modify:New attribute values
*
* ib_modify_device() changes a device's attributes as specified by
* the @device_modify_mask and @device_modify structure.
*/
int ib_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
if (!device->modify_device)
return -ENOSYS;
return device->modify_device(device, device_modify_mask,
device_modify);
}
EXPORT_SYMBOL(ib_modify_device);
/**
* ib_modify_port - Modifies the attributes for the specified port.
* @device: The device to modify.
* @port_num: The number of the port to modify.
* @port_modify_mask: Mask used to specify which attributes of the port
* to change.
* @port_modify: New attribute values for the port.
*
* ib_modify_port() changes a port's attributes as specified by the
* @port_modify_mask and @port_modify structure.
*/
int ib_modify_port(struct ib_device *device,
u8 port_num, int port_modify_mask,
struct ib_port_modify *port_modify)
{
if (!device->modify_port)
return -ENOSYS;
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
return device->modify_port(device, port_num, port_modify_mask,
port_modify);
}
EXPORT_SYMBOL(ib_modify_port);
/**
* ib_find_gid - Returns the port number and GID table index where
* a specified GID value occurs.
* @device: The device to query.
* @gid: The GID value to search for.
* @ndev: The ndev related to the GID to search for.
* @port_num: The port number of the device where the GID value was found.
* @index: The index into the GID table where the GID was found. This
* parameter may be NULL.
*/
int ib_find_gid(struct ib_device *device, union ib_gid *gid,
struct net_device *ndev, u8 *port_num, u16 *index)
{
union ib_gid tmp_gid;
int ret, port, i;
for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) {
if (rdma_cap_roce_gid_table(device, port)) {
if (!ib_find_cached_gid_by_port(device, gid, port,
ndev, index)) {
*port_num = port;
return 0;
}
}
for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) {
ret = ib_query_gid(device, port, i, &tmp_gid, NULL);
if (ret)
return ret;
if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
*port_num = port;
if (index)
*index = i;
return 0;
}
}
}
return -ENOENT;
}
EXPORT_SYMBOL(ib_find_gid);
/**
* ib_find_pkey - Returns the PKey table index where a specified
* PKey value occurs.
* @device: The device to query.
* @port_num: The port number of the device to search for the PKey.
* @pkey: The PKey value to search for.
* @index: The index into the PKey table where the PKey was found.
*/
int ib_find_pkey(struct ib_device *device,
u8 port_num, u16 pkey, u16 *index)
{
int ret, i;
u16 tmp_pkey;
int partial_ix = -1;
for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) {
ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
if (ret)
return ret;
if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
/* if there is full-member pkey take it.*/
if (tmp_pkey & 0x8000) {
*index = i;
return 0;
}
if (partial_ix < 0)
partial_ix = i;
}
}
/*no full-member, if exists take the limited*/
if (partial_ix >= 0) {
*index = partial_ix;
return 0;
}
return -ENOENT;
}
EXPORT_SYMBOL(ib_find_pkey);
/**
* ib_get_net_dev_by_params() - Return the appropriate net_dev
* for a received CM request
* @dev: An RDMA device on which the request has been received.
* @port: Port number on the RDMA device.
* @pkey: The Pkey the request came on.
* @gid: A GID that the net_dev uses to communicate.
* @addr: Contains the IP address that the request specified as its
* destination.
*/
struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
u8 port,
u16 pkey,
const union ib_gid *gid,
const struct sockaddr *addr)
{
struct net_device *net_dev = NULL;
struct ib_client_data *context;
if (!rdma_protocol_ib(dev, port))
return NULL;
down_read(&lists_rwsem);
list_for_each_entry(context, &dev->client_data_list, list) {
struct ib_client *client = context->client;
if (context->going_down)
continue;
if (client->get_net_dev_by_params) {
net_dev = client->get_net_dev_by_params(dev, port, pkey,
gid, addr,
context->data);
if (net_dev)
break;
}
}
up_read(&lists_rwsem);
return net_dev;
}
EXPORT_SYMBOL(ib_get_net_dev_by_params);
static int __init ib_core_init(void)
{
int ret;
ib_wq = alloc_workqueue("infiniband", 0, 0);
if (!ib_wq)
return -ENOMEM;
ret = class_register(&ib_class);
if (ret) {
printk(KERN_WARNING "Couldn't create InfiniBand device class\n");
goto err;
}
ret = ibnl_init();
if (ret) {
printk(KERN_WARNING "Couldn't init IB netlink interface\n");
goto err_sysfs;
}
ib_cache_setup();
return 0;
err_sysfs:
class_unregister(&ib_class);
err:
destroy_workqueue(ib_wq);
return ret;
}
static void __exit ib_core_cleanup(void)
{
ib_cache_cleanup();
ibnl_cleanup();
class_unregister(&ib_class);
/* Make sure that any pending umem accounting work is done. */
destroy_workqueue(ib_wq);
}
module_init(ib_core_init);
module_exit(ib_core_cleanup);