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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/s3/@/amd64/compile/hs32/modules/usr/src/sys/modules/usb/ufm/@/ofed/drivers/infiniband/core/uverbs_main.c |
/*
* Copyright (c) 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 PathScale, 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/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
#include "uverbs.h"
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("InfiniBand userspace verbs access");
MODULE_LICENSE("Dual BSD/GPL");
#define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
enum {
IB_UVERBS_MAJOR = 231,
IB_UVERBS_BASE_MINOR = 192,
IB_UVERBS_MAX_DEVICES = 32
};
#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
static struct class *uverbs_class;
DEFINE_SPINLOCK(ib_uverbs_idr_lock);
DEFINE_IDR(ib_uverbs_pd_idr);
DEFINE_IDR(ib_uverbs_mr_idr);
DEFINE_IDR(ib_uverbs_mw_idr);
DEFINE_IDR(ib_uverbs_ah_idr);
DEFINE_IDR(ib_uverbs_cq_idr);
DEFINE_IDR(ib_uverbs_qp_idr);
DEFINE_IDR(ib_uverbs_srq_idr);
DEFINE_IDR(ib_uverbs_xrc_domain_idr);
static spinlock_t map_lock;
static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES];
static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
const char __user *buf, int in_len,
int out_len) = {
[IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
[IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
[IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
[IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
[IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
[IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
[IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
[IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
[IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
[IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
[IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
[IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
[IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
[IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
[IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
[IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
[IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
[IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
[IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
[IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
[IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
[IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
[IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
[IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
[IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
[IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
[IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
[IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
[IB_USER_VERBS_CMD_CREATE_XRC_SRQ] = ib_uverbs_create_xrc_srq,
[IB_USER_VERBS_CMD_OPEN_XRC_DOMAIN] = ib_uverbs_open_xrc_domain,
[IB_USER_VERBS_CMD_CLOSE_XRC_DOMAIN] = ib_uverbs_close_xrc_domain,
[IB_USER_VERBS_CMD_CREATE_XRC_RCV_QP] = ib_uverbs_create_xrc_rcv_qp,
[IB_USER_VERBS_CMD_MODIFY_XRC_RCV_QP] = ib_uverbs_modify_xrc_rcv_qp,
[IB_USER_VERBS_CMD_QUERY_XRC_RCV_QP] = ib_uverbs_query_xrc_rcv_qp,
[IB_USER_VERBS_CMD_REG_XRC_RCV_QP] = ib_uverbs_reg_xrc_rcv_qp,
[IB_USER_VERBS_CMD_UNREG_XRC_RCV_QP] = ib_uverbs_unreg_xrc_rcv_qp,
};
#ifdef __linux__
/* BSD Does not require a fake mountpoint for all files. */
static struct vfsmount *uverbs_event_mnt;
#endif
static void ib_uverbs_add_one(struct ib_device *device);
static void ib_uverbs_remove_one(struct ib_device *device);
static void ib_uverbs_release_dev(struct kref *ref)
{
struct ib_uverbs_device *dev =
container_of(ref, struct ib_uverbs_device, ref);
complete(&dev->comp);
}
static void ib_uverbs_release_event_file(struct kref *ref)
{
struct ib_uverbs_event_file *file =
container_of(ref, struct ib_uverbs_event_file, ref);
kfree(file);
}
void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
struct ib_uverbs_event_file *ev_file,
struct ib_ucq_object *uobj)
{
struct ib_uverbs_event *evt, *tmp;
if (ev_file) {
spin_lock_irq(&ev_file->lock);
list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
list_del(&evt->list);
kfree(evt);
}
spin_unlock_irq(&ev_file->lock);
kref_put(&ev_file->ref, ib_uverbs_release_event_file);
}
spin_lock_irq(&file->async_file->lock);
list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
list_del(&evt->list);
kfree(evt);
}
spin_unlock_irq(&file->async_file->lock);
}
void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
struct ib_uevent_object *uobj)
{
struct ib_uverbs_event *evt, *tmp;
spin_lock_irq(&file->async_file->lock);
list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
list_del(&evt->list);
kfree(evt);
}
spin_unlock_irq(&file->async_file->lock);
}
static void ib_uverbs_detach_umcast(struct ib_qp *qp,
struct ib_uqp_object *uobj)
{
struct ib_uverbs_mcast_entry *mcast, *tmp;
list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
ib_detach_mcast(qp, &mcast->gid, mcast->lid);
list_del(&mcast->list);
kfree(mcast);
}
}
static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
struct ib_ucontext *context)
{
struct ib_uobject *uobj, *tmp;
if (!context)
return 0;
context->closing = 1;
list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
struct ib_ah *ah = uobj->object;
idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
ib_destroy_ah(ah);
kfree(uobj);
}
list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
struct ib_qp *qp = uobj->object;
struct ib_uqp_object *uqp =
container_of(uobj, struct ib_uqp_object, uevent.uobject);
idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
ib_uverbs_detach_umcast(qp, uqp);
ib_destroy_qp(qp);
ib_uverbs_release_uevent(file, &uqp->uevent);
kfree(uqp);
}
list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
struct ib_srq *srq = uobj->object;
struct ib_uevent_object *uevent =
container_of(uobj, struct ib_uevent_object, uobject);
idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
ib_destroy_srq(srq);
ib_uverbs_release_uevent(file, uevent);
kfree(uevent);
}
list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
struct ib_cq *cq = uobj->object;
struct ib_uverbs_event_file *ev_file = cq->cq_context;
struct ib_ucq_object *ucq =
container_of(uobj, struct ib_ucq_object, uobject);
idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
ib_destroy_cq(cq);
ib_uverbs_release_ucq(file, ev_file, ucq);
kfree(ucq);
}
/* XXX Free MWs */
list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
struct ib_mr *mr = uobj->object;
idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
ib_dereg_mr(mr);
kfree(uobj);
}
mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
list_for_each_entry_safe(uobj, tmp, &context->xrc_domain_list, list) {
struct ib_xrcd *xrcd = uobj->object;
struct ib_uxrc_rcv_object *xrc_qp_obj, *tmp1;
struct ib_uxrcd_object *xrcd_uobj =
container_of(uobj, struct ib_uxrcd_object, uobject);
list_for_each_entry_safe(xrc_qp_obj, tmp1,
&xrcd_uobj->xrc_reg_qp_list, list) {
list_del(&xrc_qp_obj->list);
ib_uverbs_cleanup_xrc_rcv_qp(file, xrcd,
xrc_qp_obj->qp_num);
kfree(xrc_qp_obj);
}
idr_remove_uobj(&ib_uverbs_xrc_domain_idr, uobj);
ib_uverbs_dealloc_xrcd(file->device->ib_dev, xrcd);
kfree(uobj);
}
mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
struct ib_pd *pd = uobj->object;
idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
ib_dealloc_pd(pd);
kfree(uobj);
}
return context->device->dealloc_ucontext(context);
}
static void ib_uverbs_release_file(struct kref *ref)
{
struct ib_uverbs_file *file =
container_of(ref, struct ib_uverbs_file, ref);
module_put(file->device->ib_dev->owner);
kref_put(&file->device->ref, ib_uverbs_release_dev);
kfree(file);
}
static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
size_t count, loff_t *pos)
{
struct ib_uverbs_event_file *file = filp->private_data;
struct ib_uverbs_event *event;
int eventsz;
int ret = 0;
spin_lock_irq(&file->lock);
while (list_empty(&file->event_list)) {
spin_unlock_irq(&file->lock);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
if (wait_event_interruptible(file->poll_wait,
!list_empty(&file->event_list)))
return -ERESTARTSYS;
spin_lock_irq(&file->lock);
}
event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
if (file->is_async)
eventsz = sizeof (struct ib_uverbs_async_event_desc);
else
eventsz = sizeof (struct ib_uverbs_comp_event_desc);
if (eventsz > count) {
ret = -EINVAL;
event = NULL;
} else {
list_del(file->event_list.next);
if (event->counter) {
++(*event->counter);
list_del(&event->obj_list);
}
}
spin_unlock_irq(&file->lock);
if (event) {
if (copy_to_user(buf, event, eventsz))
ret = -EFAULT;
else
ret = eventsz;
}
kfree(event);
return ret;
}
static unsigned int ib_uverbs_event_poll(struct file *filp,
struct poll_table_struct *wait)
{
unsigned int pollflags = 0;
struct ib_uverbs_event_file *file = filp->private_data;
file->filp = filp;
poll_wait(filp, &file->poll_wait, wait);
spin_lock_irq(&file->lock);
if (!list_empty(&file->event_list))
pollflags = POLLIN | POLLRDNORM;
spin_unlock_irq(&file->lock);
return pollflags;
}
static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
{
struct ib_uverbs_event_file *file = filp->private_data;
return fasync_helper(fd, filp, on, &file->async_queue);
}
static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
{
struct ib_uverbs_event_file *file = filp->private_data;
struct ib_uverbs_event *entry, *tmp;
spin_lock_irq(&file->lock);
file->is_closed = 1;
list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
if (entry->counter)
list_del(&entry->obj_list);
kfree(entry);
}
spin_unlock_irq(&file->lock);
if (file->is_async) {
ib_unregister_event_handler(&file->uverbs_file->event_handler);
kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
}
kref_put(&file->ref, ib_uverbs_release_event_file);
return 0;
}
static const struct file_operations uverbs_event_fops = {
.owner = THIS_MODULE,
.read = ib_uverbs_event_read,
.poll = ib_uverbs_event_poll,
.release = ib_uverbs_event_close,
.fasync = ib_uverbs_event_fasync
};
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
{
struct ib_uverbs_event_file *file = cq_context;
struct ib_ucq_object *uobj;
struct ib_uverbs_event *entry;
unsigned long flags;
if (!file)
return;
spin_lock_irqsave(&file->lock, flags);
if (file->is_closed) {
spin_unlock_irqrestore(&file->lock, flags);
return;
}
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
if (!entry) {
spin_unlock_irqrestore(&file->lock, flags);
return;
}
uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
entry->desc.comp.cq_handle = cq->uobject->user_handle;
entry->counter = &uobj->comp_events_reported;
list_add_tail(&entry->list, &file->event_list);
list_add_tail(&entry->obj_list, &uobj->comp_list);
spin_unlock_irqrestore(&file->lock, flags);
wake_up_interruptible(&file->poll_wait);
if (file->filp)
selwakeup(&file->filp->f_selinfo);
kill_fasync(&file->async_queue, SIGIO, POLL_IN);
}
static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
__u64 element, __u64 event,
struct list_head *obj_list,
u32 *counter)
{
struct ib_uverbs_event *entry;
unsigned long flags;
spin_lock_irqsave(&file->async_file->lock, flags);
if (file->async_file->is_closed) {
spin_unlock_irqrestore(&file->async_file->lock, flags);
return;
}
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
if (!entry) {
spin_unlock_irqrestore(&file->async_file->lock, flags);
return;
}
entry->desc.async.element = element;
entry->desc.async.event_type = event;
entry->counter = counter;
list_add_tail(&entry->list, &file->async_file->event_list);
if (obj_list)
list_add_tail(&entry->obj_list, obj_list);
spin_unlock_irqrestore(&file->async_file->lock, flags);
wake_up_interruptible(&file->async_file->poll_wait);
if (file->async_file->filp)
selwakeup(&file->async_file->filp->f_selinfo);
kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
}
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
{
struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
struct ib_ucq_object, uobject);
ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
event->event, &uobj->async_list,
&uobj->async_events_reported);
}
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
{
struct ib_uevent_object *uobj;
uobj = container_of(event->element.qp->uobject,
struct ib_uevent_object, uobject);
ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
event->event, &uobj->event_list,
&uobj->events_reported);
}
void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
{
struct ib_uevent_object *uobj;
uobj = container_of(event->element.srq->uobject,
struct ib_uevent_object, uobject);
ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
event->event, &uobj->event_list,
&uobj->events_reported);
}
void ib_uverbs_event_handler(struct ib_event_handler *handler,
struct ib_event *event)
{
struct ib_uverbs_file *file =
container_of(handler, struct ib_uverbs_file, event_handler);
ib_uverbs_async_handler(file, event->element.port_num, event->event,
NULL, NULL);
}
void ib_uverbs_xrc_rcv_qp_event_handler(struct ib_event *event,
void *context_ptr)
{
ib_uverbs_async_handler(context_ptr, event->element.xrc_qp_num,
event->event, NULL, NULL);
}
struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
int is_async, int *fd)
{
struct ib_uverbs_event_file *ev_file;
struct file *filp;
int ret;
ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
if (!ev_file)
return ERR_PTR(-ENOMEM);
kref_init(&ev_file->ref);
spin_lock_init(&ev_file->lock);
INIT_LIST_HEAD(&ev_file->event_list);
init_waitqueue_head(&ev_file->poll_wait);
ev_file->uverbs_file = uverbs_file;
ev_file->async_queue = NULL;
ev_file->is_async = is_async;
ev_file->is_closed = 0;
ev_file->filp = NULL;
*fd = get_unused_fd();
if (*fd < 0) {
ret = *fd;
goto err;
}
/*
* fops_get() can't fail here, because we're coming from a
* system call on a uverbs file, which will already have a
* module reference.
*/
filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root),
FMODE_READ, fops_get(&uverbs_event_fops));
if (!filp) {
ret = -ENFILE;
goto err_fd;
}
filp->private_data = ev_file;
return filp;
err_fd:
put_unused_fd(*fd);
err:
kfree(ev_file);
return ERR_PTR(ret);
}
/*
* Look up a completion event file by FD. If lookup is successful,
* takes a ref to the event file struct that it returns; if
* unsuccessful, returns NULL.
*/
struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
{
struct ib_uverbs_event_file *ev_file = NULL;
struct file *filp;
filp = fget(fd);
if (!filp)
return NULL;
if (filp->f_op != &uverbs_event_fops)
goto out;
ev_file = filp->private_data;
if (ev_file->is_async) {
ev_file = NULL;
goto out;
}
kref_get(&ev_file->ref);
out:
fput(filp);
return ev_file;
}
static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
size_t count, loff_t *pos)
{
struct ib_uverbs_file *file = filp->private_data;
struct ib_uverbs_cmd_hdr hdr;
if (count < sizeof hdr)
return -EINVAL;
if (copy_from_user(&hdr, buf, sizeof hdr))
return -EFAULT;
if (hdr.in_words * 4 != count)
return -EINVAL;
if (hdr.command < 0 ||
hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
!uverbs_cmd_table[hdr.command] ||
!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
return -EINVAL;
if (!file->ucontext &&
hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
return -EINVAL;
return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
hdr.in_words * 4, hdr.out_words * 4);
}
static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct ib_uverbs_file *file = filp->private_data;
if (!file->ucontext)
return -ENODEV;
else
return file->device->ib_dev->mmap(file->ucontext, vma);
}
/*
* ib_uverbs_open() does not need the BKL:
*
* - dev_table[] accesses are protected by map_lock, the
* ib_uverbs_device structures are properly reference counted, and
* everything else is purely local to the file being created, so
* races against other open calls are not a problem;
* - there is no ioctl method to race against;
* - the device is added to dev_table[] as the last part of module
* initialization, the open method will either immediately run
* -ENXIO, or all required initialization will be done.
*/
static int ib_uverbs_open(struct inode *inode, struct file *filp)
{
struct ib_uverbs_device *dev;
struct ib_uverbs_file *file;
int ret;
spin_lock(&map_lock);
dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
if (dev)
kref_get(&dev->ref);
spin_unlock(&map_lock);
if (!dev)
return -ENXIO;
if (!try_module_get(dev->ib_dev->owner)) {
ret = -ENODEV;
goto err;
}
file = kmalloc(sizeof *file, GFP_KERNEL);
if (!file) {
ret = -ENOMEM;
goto err_module;
}
file->device = dev;
file->ucontext = NULL;
file->async_file = NULL;
kref_init(&file->ref);
mutex_init(&file->mutex);
filp->private_data = file;
return 0;
err_module:
module_put(dev->ib_dev->owner);
err:
kref_put(&dev->ref, ib_uverbs_release_dev);
return ret;
}
static int ib_uverbs_close(struct inode *inode, struct file *filp)
{
struct ib_uverbs_file *file = filp->private_data;
ib_uverbs_cleanup_ucontext(file, file->ucontext);
if (file->async_file)
kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
kref_put(&file->ref, ib_uverbs_release_file);
return 0;
}
static const struct file_operations uverbs_fops = {
.owner = THIS_MODULE,
.write = ib_uverbs_write,
.open = ib_uverbs_open,
.release = ib_uverbs_close
};
static const struct file_operations uverbs_mmap_fops = {
.owner = THIS_MODULE,
.write = ib_uverbs_write,
.mmap = ib_uverbs_mmap,
.open = ib_uverbs_open,
.release = ib_uverbs_close
};
static struct ib_client uverbs_client = {
.name = "uverbs",
.add = ib_uverbs_add_one,
.remove = ib_uverbs_remove_one
};
static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
char *buf)
{
struct ib_uverbs_device *dev = dev_get_drvdata(device);
if (!dev)
return -ENODEV;
return sprintf(buf, "%s\n", dev->ib_dev->name);
}
static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
static ssize_t show_dev_abi_version(struct device *device,
struct device_attribute *attr, char *buf)
{
struct ib_uverbs_device *dev = dev_get_drvdata(device);
if (!dev)
return -ENODEV;
return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
}
static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
static ssize_t show_abi_version(struct class *class, char *buf)
{
return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
}
static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
#include <linux/pci.h>
static ssize_t
show_dev_device(struct device *device, struct device_attribute *attr, char *buf)
{
struct ib_uverbs_device *dev = dev_get_drvdata(device);
if (!dev)
return -ENODEV;
return sprintf(buf, "0x%04x\n",
((struct pci_dev *)dev->ib_dev->dma_device)->device);
}
static DEVICE_ATTR(device, S_IRUGO, show_dev_device, NULL);
static ssize_t
show_dev_vendor(struct device *device, struct device_attribute *attr, char *buf)
{
struct ib_uverbs_device *dev = dev_get_drvdata(device);
if (!dev)
return -ENODEV;
return sprintf(buf, "0x%04x\n",
((struct pci_dev *)dev->ib_dev->dma_device)->vendor);
}
static DEVICE_ATTR(vendor, S_IRUGO, show_dev_vendor, NULL);
struct attribute *device_attrs[] =
{
&dev_attr_device.attr,
&dev_attr_vendor.attr,
NULL
};
static struct attribute_group device_group = {
.name = "device",
.attrs = device_attrs
};
static void ib_uverbs_add_one(struct ib_device *device)
{
struct ib_uverbs_device *uverbs_dev;
if (!device->alloc_ucontext)
return;
uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
if (!uverbs_dev)
return;
kref_init(&uverbs_dev->ref);
init_completion(&uverbs_dev->comp);
spin_lock(&map_lock);
uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
spin_unlock(&map_lock);
goto err;
}
set_bit(uverbs_dev->devnum, dev_map);
spin_unlock(&map_lock);
uverbs_dev->ib_dev = device;
uverbs_dev->num_comp_vectors = device->num_comp_vectors;
uverbs_dev->cdev = cdev_alloc();
if (!uverbs_dev->cdev)
goto err;
uverbs_dev->cdev->owner = THIS_MODULE;
uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum);
if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
goto err_cdev;
uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
uverbs_dev->cdev->dev, uverbs_dev,
"uverbs%d", uverbs_dev->devnum);
if (IS_ERR(uverbs_dev->dev))
goto err_cdev;
if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
goto err_class;
if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
goto err_class;
if (sysfs_create_group(&uverbs_dev->dev->kobj, &device_group))
goto err_class;
spin_lock(&map_lock);
dev_table[uverbs_dev->devnum] = uverbs_dev;
spin_unlock(&map_lock);
ib_set_client_data(device, &uverbs_client, uverbs_dev);
return;
err_class:
device_destroy(uverbs_class, uverbs_dev->cdev->dev);
err_cdev:
cdev_del(uverbs_dev->cdev);
clear_bit(uverbs_dev->devnum, dev_map);
err:
kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
wait_for_completion(&uverbs_dev->comp);
kfree(uverbs_dev);
return;
}
static void ib_uverbs_remove_one(struct ib_device *device)
{
struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
if (!uverbs_dev)
return;
sysfs_remove_group(&uverbs_dev->dev->kobj, &device_group);
dev_set_drvdata(uverbs_dev->dev, NULL);
device_destroy(uverbs_class, uverbs_dev->cdev->dev);
cdev_del(uverbs_dev->cdev);
spin_lock(&map_lock);
dev_table[uverbs_dev->devnum] = NULL;
spin_unlock(&map_lock);
clear_bit(uverbs_dev->devnum, dev_map);
kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
wait_for_completion(&uverbs_dev->comp);
kfree(uverbs_dev);
}
#ifdef __linux__
static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data,
struct vfsmount *mnt)
{
return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
INFINIBANDEVENTFS_MAGIC, mnt);
}
static struct file_system_type uverbs_event_fs = {
/* No owner field so module can be unloaded */
.name = "infinibandeventfs",
.get_sb = uverbs_event_get_sb,
.kill_sb = kill_litter_super
};
#endif
static int __init ib_uverbs_init(void)
{
int ret;
spin_lock_init(&map_lock);
ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
"infiniband_verbs");
if (ret) {
printk(KERN_ERR "user_verbs: couldn't register device number\n");
goto out;
}
uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
if (IS_ERR(uverbs_class)) {
ret = PTR_ERR(uverbs_class);
printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
goto out_chrdev;
}
ret = class_create_file(uverbs_class, &class_attr_abi_version);
if (ret) {
printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
goto out_class;
}
#ifdef __linux__
ret = register_filesystem(&uverbs_event_fs);
if (ret) {
printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
goto out_class;
}
uverbs_event_mnt = kern_mount(&uverbs_event_fs);
if (IS_ERR(uverbs_event_mnt)) {
ret = PTR_ERR(uverbs_event_mnt);
printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
goto out_fs;
}
#endif
ret = ib_register_client(&uverbs_client);
if (ret) {
printk(KERN_ERR "user_verbs: couldn't register client\n");
goto out_mnt;
}
return 0;
out_mnt:
#ifdef __linux__
mntput(uverbs_event_mnt);
out_fs:
unregister_filesystem(&uverbs_event_fs);
#endif
out_class:
class_destroy(uverbs_class);
out_chrdev:
unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
out:
return ret;
}
static void __exit ib_uverbs_cleanup(void)
{
ib_unregister_client(&uverbs_client);
#ifdef __linux__
mntput(uverbs_event_mnt);
unregister_filesystem(&uverbs_event_fs);
#endif
class_destroy(uverbs_class);
unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
idr_destroy(&ib_uverbs_pd_idr);
idr_destroy(&ib_uverbs_mr_idr);
idr_destroy(&ib_uverbs_mw_idr);
idr_destroy(&ib_uverbs_ah_idr);
idr_destroy(&ib_uverbs_cq_idr);
idr_destroy(&ib_uverbs_qp_idr);
idr_destroy(&ib_uverbs_srq_idr);
}
module_init(ib_uverbs_init);
module_exit(ib_uverbs_cleanup);