/*
* Copyright (c) 2005 Topspin Communications. All rights reserved.
- * Copyright (c) 2005 Cisco Systems. 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
* 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: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
*/
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/file.h>
#include <linux/mount.h>
+#include <linux/cdev.h>
#include <asm/uaccess.h>
#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
-DECLARE_MUTEX(ib_uverbs_idr_mutex);
+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_srq_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_QUERY_PARAMS] = ib_uverbs_query_params,
- [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_QUERY_GID] = ib_uverbs_query_gid,
- [IB_USER_VERBS_CMD_QUERY_PKEY] = ib_uverbs_query_pkey,
- [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_CQ] = ib_uverbs_create_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_MODIFY_QP] = ib_uverbs_modify_qp,
- [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
- [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_DESTROY_SRQ] = ib_uverbs_destroy_srq,
+ [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,
};
static struct vfsmount *uverbs_event_mnt;
static void ib_uverbs_add_one(struct ib_device *device);
static void ib_uverbs_remove_one(struct ib_device *device);
-static int ib_dealloc_ucontext(struct ib_ucontext *context)
+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;
- down(&ib_uverbs_idr_mutex);
+ context->closing = 1;
+
+ list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
+ struct ib_ah *ah = uobj->object;
- /* XXX Free AHs */
+ 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 = idr_find(&ib_uverbs_qp_idr, uobj->id);
- idr_remove(&ib_uverbs_qp_idr, uobj->id);
+ 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);
- list_del(&uobj->list);
- kfree(container_of(uobj, struct ib_uevent_object, uobject));
+ ib_uverbs_release_uevent(file, &uqp->uevent);
+ kfree(uqp);
}
list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
- struct ib_cq *cq = idr_find(&ib_uverbs_cq_idr, uobj->id);
- idr_remove(&ib_uverbs_cq_idr, uobj->id);
+ 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);
- list_del(&uobj->list);
- kfree(container_of(uobj, struct ib_ucq_object, uobject));
+ ib_uverbs_release_ucq(file, ev_file, ucq);
+ kfree(ucq);
}
list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
- struct ib_srq *srq = idr_find(&ib_uverbs_srq_idr, uobj->id);
- idr_remove(&ib_uverbs_srq_idr, uobj->id);
+ 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);
- list_del(&uobj->list);
- kfree(container_of(uobj, struct ib_uevent_object, uobject));
+ ib_uverbs_release_uevent(file, uevent);
+ kfree(uevent);
}
/* XXX Free MWs */
list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
- struct ib_mr *mr = idr_find(&ib_uverbs_mr_idr, uobj->id);
- struct ib_device *mrdev = mr->device;
- struct ib_umem_object *memobj;
+ struct ib_mr *mr = uobj->object;
- idr_remove(&ib_uverbs_mr_idr, uobj->id);
+ idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
ib_dereg_mr(mr);
-
- memobj = container_of(uobj, struct ib_umem_object, uobject);
- ib_umem_release_on_close(mrdev, &memobj->umem);
-
- list_del(&uobj->list);
- kfree(memobj);
+ kfree(uobj);
}
list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
- struct ib_pd *pd = idr_find(&ib_uverbs_pd_idr, uobj->id);
- idr_remove(&ib_uverbs_pd_idr, uobj->id);
+ struct ib_pd *pd = uobj->object;
+
+ idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
ib_dealloc_pd(pd);
- list_del(&uobj->list);
kfree(uobj);
}
- up(&ib_uverbs_idr_mutex);
-
return context->device->dealloc_ucontext(context);
}
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);
}
spin_lock_irq(&file->lock);
- while (list_empty(&file->event_list) && file->fd >= 0) {
+ 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) ||
- file->fd < 0))
+ !list_empty(&file->event_list)))
return -ERESTARTSYS;
spin_lock_irq(&file->lock);
}
- if (file->fd < 0) {
- spin_unlock_irq(&file->lock);
- return -ENODEV;
- }
-
event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
if (file->is_async)
poll_wait(filp, &file->poll_wait, wait);
spin_lock_irq(&file->lock);
- if (file->fd < 0)
- pollflags = POLLERR;
- else if (!list_empty(&file->event_list))
+ if (!list_empty(&file->event_list))
pollflags = POLLIN | POLLRDNORM;
spin_unlock_irq(&file->lock);
return pollflags;
}
-static void ib_uverbs_event_release(struct ib_uverbs_event_file *file)
-{
- struct ib_uverbs_event *entry, *tmp;
-
- spin_lock_irq(&file->lock);
- if (file->fd != -1) {
- file->fd = -1;
- list_for_each_entry_safe(entry, tmp, &file->event_list, list)
- kfree(entry);
- }
- spin_unlock_irq(&file->lock);
-}
-
static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
{
struct ib_uverbs_event_file *file = filp->private_data;
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;
- ib_uverbs_event_release(file);
- ib_uverbs_event_fasync(-1, filp, 0);
- kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
+ 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 struct file_operations uverbs_event_fops = {
- /*
- * No .owner field since we artificially create event files,
- * so there is no increment to the module reference count in
- * the open path. All event files come from a uverbs command
- * file, which already takes a module reference, so this is OK.
- */
+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,
void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
{
- struct ib_uverbs_file *file = cq_context;
- struct ib_ucq_object *uobj;
- struct ib_uverbs_event *entry;
- unsigned long flags;
+ 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)
+ 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;
- spin_lock_irqsave(&file->comp_file[0].lock, flags);
- list_add_tail(&entry->list, &file->comp_file[0].event_list);
+ list_add_tail(&entry->list, &file->event_list);
list_add_tail(&entry->obj_list, &uobj->comp_list);
- spin_unlock_irqrestore(&file->comp_file[0].lock, flags);
+ spin_unlock_irqrestore(&file->lock, flags);
- wake_up_interruptible(&file->comp_file[0].poll_wait);
- kill_fasync(&file->comp_file[0].async_queue, SIGIO, POLL_IN);
+ wake_up_interruptible(&file->poll_wait);
+ kill_fasync(&file->async_queue, SIGIO, POLL_IN);
}
static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
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)
+ 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;
- spin_lock_irqsave(&file->async_file.lock, flags);
- list_add_tail(&entry->list, &file->async_file.event_list);
+ 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);
+ spin_unlock_irqrestore(&file->async_file->lock, flags);
- wake_up_interruptible(&file->async_file.poll_wait);
- kill_fasync(&file->async_file.async_queue, SIGIO, POLL_IN);
+ wake_up_interruptible(&file->async_file->poll_wait);
+ 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;
-
- uobj = container_of(event->element.cq->uobject,
- struct ib_ucq_object, uobject);
+ struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
+ struct ib_ucq_object, uobject);
- ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
+ 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)
&uobj->events_reported);
}
-static void ib_uverbs_event_handler(struct ib_event_handler *handler,
- struct ib_event *event)
+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);
NULL, NULL);
}
-static int ib_uverbs_event_init(struct ib_uverbs_event_file *file,
- struct ib_uverbs_file *uverbs_file)
+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;
- spin_lock_init(&file->lock);
- INIT_LIST_HEAD(&file->event_list);
- init_waitqueue_head(&file->poll_wait);
- file->uverbs_file = uverbs_file;
- file->async_queue = NULL;
-
- file->fd = get_unused_fd();
- if (file->fd < 0)
- return file->fd;
+ 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;
+
+ *fd = get_unused_fd();
+ if (*fd < 0) {
+ ret = *fd;
+ goto err;
+ }
- filp = get_empty_filp();
+ /*
+ * 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) {
- put_unused_fd(file->fd);
- return -ENFILE;
+ ret = -ENFILE;
+ goto err_fd;
}
- filp->f_op = &uverbs_event_fops;
- filp->f_vfsmnt = mntget(uverbs_event_mnt);
- filp->f_dentry = dget(uverbs_event_mnt->mnt_root);
- filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
- filp->f_flags = O_RDONLY;
- filp->f_mode = FMODE_READ;
- filp->private_data = file;
+ filp->private_data = ev_file;
- fd_install(file->fd, filp);
+ return filp;
- return 0;
+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,
if (hdr.command < 0 ||
hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
- !uverbs_cmd_table[hdr.command])
+ !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_QUERY_PARAMS &&
+ if (!file->ucontext &&
hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
return -EINVAL;
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 =
- container_of(inode->i_cdev, struct ib_uverbs_device, dev);
+ struct ib_uverbs_device *dev;
struct ib_uverbs_file *file;
- int i = 0;
int ret;
- if (!try_module_get(dev->ib_dev->owner))
- return -ENODEV;
+ spin_lock(&map_lock);
+ dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
+ if (dev)
+ kref_get(&dev->ref);
+ spin_unlock(&map_lock);
- file = kmalloc(sizeof *file +
- (dev->num_comp - 1) * sizeof (struct ib_uverbs_event_file),
- GFP_KERNEL);
- if (!file) {
- ret = -ENOMEM;
+ if (!dev)
+ return -ENXIO;
+
+ if (!try_module_get(dev->ib_dev->owner)) {
+ ret = -ENODEV;
goto err;
}
- file->device = dev;
- kref_init(&file->ref);
- init_MUTEX(&file->mutex);
-
- file->ucontext = NULL;
-
- kref_get(&file->ref);
- ret = ib_uverbs_event_init(&file->async_file, file);
- if (ret)
- goto err_kref;
-
- file->async_file.is_async = 1;
-
- for (i = 0; i < dev->num_comp; ++i) {
- kref_get(&file->ref);
- ret = ib_uverbs_event_init(&file->comp_file[i], file);
- if (ret)
- goto err_async;
- file->comp_file[i].is_async = 0;
+ 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;
- INIT_IB_EVENT_HANDLER(&file->event_handler, dev->ib_dev,
- ib_uverbs_event_handler);
- if (ib_register_event_handler(&file->event_handler))
- goto err_async;
-
return 0;
-err_async:
- while (i--)
- ib_uverbs_event_release(&file->comp_file[i]);
-
- ib_uverbs_event_release(&file->async_file);
-
-err_kref:
- /*
- * One extra kref_put() because we took a reference before the
- * event file creation that failed and got us here.
- */
- kref_put(&file->ref, ib_uverbs_release_file);
- kref_put(&file->ref, ib_uverbs_release_file);
+err_module:
+ module_put(dev->ib_dev->owner);
err:
- module_put(dev->ib_dev->owner);
+ 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;
- int i;
- ib_unregister_event_handler(&file->event_handler);
- ib_uverbs_event_release(&file->async_file);
- ib_dealloc_ucontext(file->ucontext);
+ ib_uverbs_cleanup_ucontext(file, file->ucontext);
- for (i = 0; i < file->device->num_comp; ++i)
- ib_uverbs_event_release(&file->comp_file[i]);
+ 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 struct file_operations uverbs_fops = {
+static const struct file_operations uverbs_fops = {
.owner = THIS_MODULE,
.write = ib_uverbs_write,
.open = ib_uverbs_open,
.release = ib_uverbs_close
};
-static struct file_operations uverbs_mmap_fops = {
+static const struct file_operations uverbs_mmap_fops = {
.owner = THIS_MODULE,
.write = ib_uverbs_write,
.mmap = ib_uverbs_mmap,
.remove = ib_uverbs_remove_one
};
-static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
+static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
+ char *buf)
{
- struct ib_uverbs_device *dev =
- container_of(class_dev, struct ib_uverbs_device, class_dev);
+ struct ib_uverbs_device *dev = dev_get_drvdata(device);
+
+ if (!dev)
+ return -ENODEV;
return sprintf(buf, "%s\n", dev->ib_dev->name);
}
-static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
+static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
-static void ib_uverbs_release_class_dev(struct class_device *class_dev)
+static ssize_t show_dev_abi_version(struct device *device,
+ struct device_attribute *attr, char *buf)
{
- struct ib_uverbs_device *dev =
- container_of(class_dev, struct ib_uverbs_device, class_dev);
+ struct ib_uverbs_device *dev = dev_get_drvdata(device);
- cdev_del(&dev->dev);
- clear_bit(dev->devnum, dev_map);
- kfree(dev);
-}
+ if (!dev)
+ return -ENODEV;
-static struct class uverbs_class = {
- .name = "infiniband_verbs",
- .release = ib_uverbs_release_class_dev
-};
+ 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)
{
if (!device->alloc_ucontext)
return;
- uverbs_dev = kmalloc(sizeof *uverbs_dev, GFP_KERNEL);
+ uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
if (!uverbs_dev)
return;
- memset(uverbs_dev, 0, sizeof *uverbs_dev);
+ 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);
set_bit(uverbs_dev->devnum, dev_map);
spin_unlock(&map_lock);
- uverbs_dev->ib_dev = device;
- uverbs_dev->num_comp = 1;
+ uverbs_dev->ib_dev = device;
+ uverbs_dev->num_comp_vectors = device->num_comp_vectors;
- if (device->mmap)
- cdev_init(&uverbs_dev->dev, &uverbs_mmap_fops);
- else
- cdev_init(&uverbs_dev->dev, &uverbs_fops);
- uverbs_dev->dev.owner = THIS_MODULE;
- kobject_set_name(&uverbs_dev->dev.kobj, "uverbs%d", uverbs_dev->devnum);
- if (cdev_add(&uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
+ 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->class_dev.class = &uverbs_class;
- uverbs_dev->class_dev.dev = device->dma_device;
- uverbs_dev->class_dev.devt = uverbs_dev->dev.dev;
- snprintf(uverbs_dev->class_dev.class_id, BUS_ID_SIZE, "uverbs%d", uverbs_dev->devnum);
- if (class_device_register(&uverbs_dev->class_dev))
+ 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 (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_ibdev))
+ 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;
+ 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:
- class_device_unregister(&uverbs_dev->class_dev);
+ device_destroy(uverbs_class, uverbs_dev->cdev->dev);
err_cdev:
- cdev_del(&uverbs_dev->dev);
+ 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;
}
if (!uverbs_dev)
return;
- class_device_unregister(&uverbs_dev->class_dev);
+ 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);
}
-static struct super_block *uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+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);
+ INFINIBANDEVENTFS_MAGIC, mnt);
}
static struct file_system_type uverbs_event_fs = {
goto out;
}
- ret = class_register(&uverbs_class);
- if (ret) {
+ 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);
+ 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;
unregister_filesystem(&uverbs_event_fs);
out_class:
- class_unregister(&uverbs_class);
+ class_destroy(uverbs_class);
out_chrdev:
unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
ib_unregister_client(&uverbs_client);
mntput(uverbs_event_mnt);
unregister_filesystem(&uverbs_event_fs);
- class_unregister(&uverbs_class);
+ 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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff