/*
* Copyright (c) 2004 Topspin Communications. 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.
*
* $Id: user_mad.c,v 1.1 2005/03/04 14:41:21 nathans.longdrop.melbourne.sgi.com Exp $
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/poll.h>
#include <linux/rwsem.h>
#include <linux/kref.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <ib_mad.h>
#include <ib_user_mad.h>
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("InfiniBand userspace MAD packet access");
MODULE_LICENSE("Dual BSD/GPL");
enum {
IB_UMAD_MAX_PORTS = 64,
IB_UMAD_MAX_AGENTS = 32,
IB_UMAD_MAJOR = 231,
IB_UMAD_MINOR_BASE = 0
};
struct ib_umad_port {
int devnum;
struct cdev dev;
struct class_device class_dev;
int sm_devnum;
struct cdev sm_dev;
struct class_device sm_class_dev;
struct semaphore sm_sem;
struct ib_device *ib_dev;
struct ib_umad_device *umad_dev;
u8 port_num;
};
struct ib_umad_device {
int start_port, end_port;
struct kref ref;
struct ib_umad_port port[0];
};
struct ib_umad_file {
struct ib_umad_port *port;
spinlock_t recv_lock;
struct list_head recv_list;
wait_queue_head_t recv_wait;
struct rw_semaphore agent_mutex;
struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS];
struct ib_mr *mr[IB_UMAD_MAX_AGENTS];
};
struct ib_umad_packet {
struct ib_user_mad mad;
struct ib_ah *ah;
struct list_head list;
DECLARE_PCI_UNMAP_ADDR(mapping)
};
static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE);
static spinlock_t map_lock;
static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS * 2);
static void ib_umad_add_one(struct ib_device *device);
static void ib_umad_remove_one(struct ib_device *device);
static int queue_packet(struct ib_umad_file *file,
struct ib_mad_agent *agent,
struct ib_umad_packet *packet)
{
int ret = 1;
down_read(&file->agent_mutex);
for (packet->mad.id = 0;
packet->mad.id < IB_UMAD_MAX_AGENTS;
packet->mad.id++)
if (agent == file->agent[packet->mad.id]) {
spin_lock_irq(&file->recv_lock);
list_add_tail(&packet->list, &file->recv_list);
spin_unlock_irq(&file->recv_lock);
wake_up_interruptible(&file->recv_wait);
ret = 0;
break;
}
up_read(&file->agent_mutex);
return ret;
}
static void send_handler(struct ib_mad_agent *agent,
struct ib_mad_send_wc *send_wc)
{
struct ib_umad_file *file = agent->context;
struct ib_umad_packet *packet =
(void *) (unsigned long) send_wc->wr_id;
dma_unmap_single(agent->device->dma_device,
pci_unmap_addr(packet, mapping),
sizeof packet->mad.data,
DMA_TO_DEVICE);
ib_destroy_ah(packet->ah);
if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) {
packet->mad.status = ETIMEDOUT;
if (!queue_packet(file, agent, packet))
return;
}
kfree(packet);
}
static void recv_handler(struct ib_mad_agent *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct ib_umad_file *file = agent->context;
struct ib_umad_packet *packet;
if (mad_recv_wc->wc->status != IB_WC_SUCCESS)
goto out;
packet = kmalloc(sizeof *packet, GFP_KERNEL);
if (!packet)
goto out;
memset(packet, 0, sizeof *packet);
memcpy(packet->mad.data, mad_recv_wc->recv_buf.mad, sizeof packet->mad.data);
packet->mad.status = 0;
packet->mad.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
packet->mad.lid = cpu_to_be16(mad_recv_wc->wc->slid);
packet->mad.sl = mad_recv_wc->wc->sl;
packet->mad.path_bits = mad_recv_wc->wc->dlid_path_bits;
packet->mad.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
if (packet->mad.grh_present) {
/* XXX parse GRH */
packet->mad.gid_index = 0;
packet->mad.hop_limit = 0;
packet->mad.traffic_class = 0;
memset(packet->mad.gid, 0, 16);
packet->mad.flow_label = 0;
}
if (queue_packet(file, agent, packet))
kfree(packet);
out:
ib_free_recv_mad(mad_recv_wc);
}
static ssize_t ib_umad_read(struct file *filp, char __user *buf,
size_t count, loff_t *pos)
{
struct ib_umad_file *file = filp->private_data;
struct ib_umad_packet *packet;
ssize_t ret;
if (count < sizeof (struct ib_user_mad))
return -EINVAL;
spin_lock_irq(&file->recv_lock);
while (list_empty(&file->recv_list)) {
spin_unlock_irq(&file->recv_lock);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
if (wait_event_interruptible(file->recv_wait,
!list_empty(&file->recv_list)))
return -ERESTARTSYS;
spin_lock_irq(&file->recv_lock);
}
packet = list_entry(file->recv_list.next, struct ib_umad_packet, list);
list_del(&packet->list);
spin_unlock_irq(&file->recv_lock);
if (copy_to_user(buf, &packet->mad, sizeof packet->mad))
ret = -EFAULT;
else
ret = sizeof packet->mad;
kfree(packet);
return ret;
}
static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
size_t count, loff_t *pos)
{
struct ib_umad_file *file = filp->private_data;
struct ib_umad_packet *packet;
struct ib_mad_agent *agent;
struct ib_ah_attr ah_attr;
struct ib_sge gather_list;
struct ib_send_wr *bad_wr, wr = {
.opcode = IB_WR_SEND,
.sg_list = &gather_list,
.num_sge = 1,
.send_flags = IB_SEND_SIGNALED,
};
u8 method;
u64 *tid;
int ret;
if (count < sizeof (struct ib_user_mad))
return -EINVAL;
packet = kmalloc(sizeof *packet, GFP_KERNEL);
if (!packet)
return -ENOMEM;
if (copy_from_user(&packet->mad, buf, sizeof packet->mad)) {
kfree(packet);
return -EFAULT;
}
if (packet->mad.id < 0 || packet->mad.id >= IB_UMAD_MAX_AGENTS) {
ret = -EINVAL;
goto err;
}
down_read(&file->agent_mutex);
agent = file->agent[packet->mad.id];
if (!agent) {
ret = -EINVAL;
goto err_up;
}
/*
* If userspace is generating a request that will generate a
* response, we need to make sure the high-order part of the
* transaction ID matches the agent being used to send the
* MAD.
*/
method = ((struct ib_mad_hdr *) packet->mad.data)->method;
if (!(method & IB_MGMT_METHOD_RESP) &&
method != IB_MGMT_METHOD_TRAP_REPRESS &&
method != IB_MGMT_METHOD_SEND) {
tid = &((struct ib_mad_hdr *) packet->mad.data)->tid;
*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
(be64_to_cpup(tid) & 0xffffffff));
}
memset(&ah_attr, 0, sizeof ah_attr);
ah_attr.dlid = be16_to_cpu(packet->mad.lid);
ah_attr.sl = packet->mad.sl;
ah_attr.src_path_bits = packet->mad.path_bits;
ah_attr.port_num = file->port->port_num;
if (packet->mad.grh_present) {
ah_attr.ah_flags = IB_AH_GRH;
memcpy(ah_attr.grh.dgid.raw, packet->mad.gid, 16);
ah_attr.grh.flow_label = packet->mad.flow_label;
ah_attr.grh.hop_limit = packet->mad.hop_limit;
ah_attr.grh.traffic_class = packet->mad.traffic_class;
}
packet->ah = ib_create_ah(agent->qp->pd, &ah_attr);
if (IS_ERR(packet->ah)) {
ret = PTR_ERR(packet->ah);
goto err_up;
}
gather_list.addr = dma_map_single(agent->device->dma_device,
packet->mad.data,
sizeof packet->mad.data,
DMA_TO_DEVICE);
gather_list.length = sizeof packet->mad.data;
gather_list.lkey = file->mr[packet->mad.id]->lkey;
pci_unmap_addr_set(packet, mapping, gather_list.addr);
wr.wr.ud.mad_hdr = (struct ib_mad_hdr *) packet->mad.data;
wr.wr.ud.ah = packet->ah;
wr.wr.ud.remote_qpn = be32_to_cpu(packet->mad.qpn);
wr.wr.ud.remote_qkey = be32_to_cpu(packet->mad.qkey);
wr.wr.ud.timeout_ms = packet->mad.timeout_ms;
wr.wr_id = (unsigned long) packet;
ret = ib_post_send_mad(agent, &wr, &bad_wr);
if (ret) {
dma_unmap_single(agent->device->dma_device,
pci_unmap_addr(packet, mapping),
sizeof packet->mad.data,
DMA_TO_DEVICE);
goto err_up;
}
up_read(&file->agent_mutex);
return sizeof packet->mad;
err_up:
up_read(&file->agent_mutex);
err:
kfree(packet);
return ret;
}
static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait)
{
struct ib_umad_file *file = filp->private_data;
/* we will always be able to post a MAD send */
unsigned int mask = POLLOUT | POLLWRNORM;
poll_wait(filp, &file->recv_wait, wait);
if (!list_empty(&file->recv_list))
mask |= POLLIN | POLLRDNORM;
return mask;
}
static int ib_umad_reg_agent(struct ib_umad_file *file, unsigned long arg)
{
struct ib_user_mad_reg_req ureq;
struct ib_mad_reg_req req;
struct ib_mad_agent *agent;
int agent_id;
int ret;
down_write(&file->agent_mutex);
if (copy_from_user(&ureq, (void __user *) arg, sizeof ureq)) {
ret = -EFAULT;
goto out;
}
if (ureq.qpn != 0 && ureq.qpn != 1) {
ret = -EINVAL;
goto out;
}
for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
if (!file->agent[agent_id])
goto found;
ret = -ENOMEM;
goto out;
found:
req.mgmt_class = ureq.mgmt_class;
req.mgmt_class_version = ureq.mgmt_class_version;
memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
memcpy(req.oui, ureq.oui, sizeof req.oui);
agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
&req, 0, send_handler, recv_handler,
file);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto out;
}
file->agent[agent_id] = agent;
file->mr[agent_id] = ib_get_dma_mr(agent->qp->pd, IB_ACCESS_LOCAL_WRITE);
if (IS_ERR(file->mr[agent_id])) {
ret = -ENOMEM;
goto err;
}
if (put_user(agent_id,
(u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {
ret = -EFAULT;
goto err_mr;
}
ret = 0;
goto out;
err_mr:
ib_dereg_mr(file->mr[agent_id]);
err:
file->agent[agent_id] = NULL;
ib_unregister_mad_agent(agent);
out:
up_write(&file->agent_mutex);
return ret;
}
static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg)
{
u32 id;
int ret = 0;
down_write(&file->agent_mutex);
if (get_user(id, (u32 __user *) arg)) {
ret = -EFAULT;
goto out;
}
if (id < 0 || id >= IB_UMAD_MAX_AGENTS || !file->agent[id]) {
ret = -EINVAL;
goto out;
}
ib_dereg_mr(file->mr[id]);
ib_unregister_mad_agent(file->agent[id]);
file->agent[id] = NULL;
out:
up_write(&file->agent_mutex);
return ret;
}
static long ib_umad_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case IB_USER_MAD_REGISTER_AGENT:
return ib_umad_reg_agent(filp->private_data, arg);
case IB_USER_MAD_UNREGISTER_AGENT:
return ib_umad_unreg_agent(filp->private_data, arg);
default:
return -ENOIOCTLCMD;
}
}
static int ib_umad_open(struct inode *inode, struct file *filp)
{
struct ib_umad_port *port =
container_of(inode->i_cdev, struct ib_umad_port, dev);
struct ib_umad_file *file;
file = kmalloc(sizeof *file, GFP_KERNEL);
if (!file)
return -ENOMEM;
memset(file, 0, sizeof *file);
spin_lock_init(&file->recv_lock);
init_rwsem(&file->agent_mutex);
INIT_LIST_HEAD(&file->recv_list);
init_waitqueue_head(&file->recv_wait);
file->port = port;
filp->private_data = file;
return 0;
}
static int ib_umad_close(struct inode *inode, struct file *filp)
{
struct ib_umad_file *file = filp->private_data;
int i;
for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i)
if (file->agent[i]) {
ib_dereg_mr(file->mr[i]);
ib_unregister_mad_agent(file->agent[i]);
}
kfree(file);
return 0;
}
static struct file_operations umad_fops = {
.owner = THIS_MODULE,
.read = ib_umad_read,
.write = ib_umad_write,
.poll = ib_umad_poll,
.unlocked_ioctl = ib_umad_ioctl,
.compat_ioctl = ib_umad_ioctl,
.open = ib_umad_open,
.release = ib_umad_close
};
static int ib_umad_sm_open(struct inode *inode, struct file *filp)
{
struct ib_umad_port *port =
container_of(inode->i_cdev, struct ib_umad_port, sm_dev);
struct ib_port_modify props = {
.set_port_cap_mask = IB_PORT_SM
};
int ret;
if (filp->f_flags & O_NONBLOCK) {
if (down_trylock(&port->sm_sem))
return -EAGAIN;
} else {
if (down_interruptible(&port->sm_sem))
return -ERESTARTSYS;
}
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
if (ret) {
up(&port->sm_sem);
return ret;
}
filp->private_data = port;
return 0;
}
static int ib_umad_sm_close(struct inode *inode, struct file *filp)
{
struct ib_umad_port *port = filp->private_data;
struct ib_port_modify props = {
.clr_port_cap_mask = IB_PORT_SM
};
int ret;
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
up(&port->sm_sem);
return ret;
}
static struct file_operations umad_sm_fops = {
.owner = THIS_MODULE,
.open = ib_umad_sm_open,
.release = ib_umad_sm_close
};
static struct ib_client umad_client = {
.name = "umad",
.add = ib_umad_add_one,
.remove = ib_umad_remove_one
};
static ssize_t show_dev(struct class_device *class_dev, char *buf)
{
struct ib_umad_port *port = class_get_devdata(class_dev);
if (class_dev == &port->class_dev)
return print_dev_t(buf, port->dev.dev);
else
return print_dev_t(buf, port->sm_dev.dev);
}
static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
{
struct ib_umad_port *port = class_get_devdata(class_dev);
return sprintf(buf, "%s\n", port->ib_dev->name);
}
static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
static ssize_t show_port(struct class_device *class_dev, char *buf)
{
struct ib_umad_port *port = class_get_devdata(class_dev);
return sprintf(buf, "%d\n", port->port_num);
}
static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
static void ib_umad_release_dev(struct kref *ref)
{
struct ib_umad_device *dev =
container_of(ref, struct ib_umad_device, ref);
kfree(dev);
}
static void ib_umad_release_port(struct class_device *class_dev)
{
struct ib_umad_port *port = class_get_devdata(class_dev);
if (class_dev == &port->class_dev) {
cdev_del(&port->dev);
clear_bit(port->devnum, dev_map);
} else {
cdev_del(&port->sm_dev);
clear_bit(port->sm_devnum, dev_map);
}
kref_put(&port->umad_dev->ref, ib_umad_release_dev);
}
static struct class umad_class = {
.name = "infiniband_mad",
.release = ib_umad_release_port
};
static ssize_t show_abi_version(struct class *class, char *buf)
{
return sprintf(buf, "%d\n", IB_USER_MAD_ABI_VERSION);
}
static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
static int ib_umad_init_port(struct ib_device *device, int port_num,
struct ib_umad_port *port)
{
spin_lock(&map_lock);
port->devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
if (port->devnum >= IB_UMAD_MAX_PORTS) {
spin_unlock(&map_lock);
return -1;
}
port->sm_devnum = find_next_zero_bit(dev_map, IB_UMAD_MAX_PORTS * 2, IB_UMAD_MAX_PORTS);
if (port->sm_devnum >= IB_UMAD_MAX_PORTS * 2) {
spin_unlock(&map_lock);
return -1;
}
set_bit(port->devnum, dev_map);
set_bit(port->sm_devnum, dev_map);
spin_unlock(&map_lock);
port->ib_dev = device;
port->port_num = port_num;
init_MUTEX(&port->sm_sem);
cdev_init(&port->dev, &umad_fops);
port->dev.owner = THIS_MODULE;
kobject_set_name(&port->dev.kobj, "umad%d", port->devnum);
if (cdev_add(&port->dev, base_dev + port->devnum, 1))
return -1;
port->class_dev.class = &umad_class;
port->class_dev.dev = device->dma_device;
snprintf(port->class_dev.class_id, BUS_ID_SIZE, "umad%d", port->devnum);
if (class_device_register(&port->class_dev))
goto err_cdev;
class_set_devdata(&port->class_dev, port);
kref_get(&port->umad_dev->ref);
if (class_device_create_file(&port->class_dev, &class_device_attr_dev))
goto err_class;
if (class_device_create_file(&port->class_dev, &class_device_attr_ibdev))
goto err_class;
if (class_device_create_file(&port->class_dev, &class_device_attr_port))
goto err_class;
cdev_init(&port->sm_dev, &umad_sm_fops);
port->sm_dev.owner = THIS_MODULE;
kobject_set_name(&port->dev.kobj, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS);
if (cdev_add(&port->sm_dev, base_dev + port->sm_devnum, 1))
return -1;
port->sm_class_dev.class = &umad_class;
port->sm_class_dev.dev = device->dma_device;
snprintf(port->sm_class_dev.class_id, BUS_ID_SIZE, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS);
if (class_device_register(&port->sm_class_dev))
goto err_sm_cdev;
class_set_devdata(&port->sm_class_dev, port);
kref_get(&port->umad_dev->ref);
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_dev))
goto err_sm_class;
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_ibdev))
goto err_sm_class;
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_port))
goto err_sm_class;
return 0;
err_sm_class:
class_device_unregister(&port->sm_class_dev);
err_sm_cdev:
cdev_del(&port->sm_dev);
err_class:
class_device_unregister(&port->class_dev);
err_cdev:
cdev_del(&port->dev);
clear_bit(port->devnum, dev_map);
return -1;
}
static void ib_umad_add_one(struct ib_device *device)
{
struct ib_umad_device *umad_dev;
int s, e, i;
if (device->node_type == IB_NODE_SWITCH)
s = e = 0;
else {
s = 1;
e = device->phys_port_cnt;
}
umad_dev = kmalloc(sizeof *umad_dev +
(e - s + 1) * sizeof (struct ib_umad_port),
GFP_KERNEL);
if (!umad_dev)
return;
memset(umad_dev, 0, sizeof *umad_dev +
(e - s + 1) * sizeof (struct ib_umad_port));
kref_init(&umad_dev->ref);
umad_dev->start_port = s;
umad_dev->end_port = e;
for (i = s; i <= e; ++i) {
umad_dev->port[i - s].umad_dev = umad_dev;
if (ib_umad_init_port(device, i, &umad_dev->port[i - s]))
goto err;
}
ib_set_client_data(device, &umad_client, umad_dev);
return;
err:
while (--i >= s) {
class_device_unregister(&umad_dev->port[i - s].class_dev);
class_device_unregister(&umad_dev->port[i - s].sm_class_dev);
}
kref_put(&umad_dev->ref, ib_umad_release_dev);
}
static void ib_umad_remove_one(struct ib_device *device)
{
struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client);
int i;
if (!umad_dev)
return;
for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) {
class_device_unregister(&umad_dev->port[i].class_dev);
class_device_unregister(&umad_dev->port[i].sm_class_dev);
}
kref_put(&umad_dev->ref, ib_umad_release_dev);
}
static int __init ib_umad_init(void)
{
int ret;
spin_lock_init(&map_lock);
ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2,
"infiniband_mad");
if (ret) {
printk(KERN_ERR "user_mad: couldn't register device number\n");
goto out;
}
ret = class_register(&umad_class);
if (ret) {
printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n");
goto out_chrdev;
}
ret = class_create_file(&umad_class, &class_attr_abi_version);
if (ret) {
printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n");
goto out_class;
}
ret = ib_register_client(&umad_client);
if (ret) {
printk(KERN_ERR "user_mad: couldn't register ib_umad client\n");
goto out_class;
}
return 0;
out_class:
class_unregister(&umad_class);
out_chrdev:
unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
out:
return ret;
}
static void __exit ib_umad_cleanup(void)
{
ib_unregister_client(&umad_client);
class_unregister(&umad_class);
unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
}
module_init(ib_umad_init);
module_exit(ib_umad_cleanup);
![[BACK]](/icons/back.gif){kind=icon}
Return to user_mad.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
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