diff options
Diffstat (limited to 'drivers/infiniband/core/uverbs_main.c')
-rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 301 |
1 files changed, 87 insertions, 214 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 970d8e31dd65..2d4083bf4a04 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -125,17 +125,8 @@ static void ib_uverbs_release_dev(struct device *device) kfree(dev); } -static void ib_uverbs_release_async_event_file(struct kref *ref) -{ - struct ib_uverbs_async_event_file *file = - container_of(ref, struct ib_uverbs_async_event_file, ref); - - kfree(file); -} - -void ib_uverbs_release_ucq(struct ib_uverbs_file *file, - struct ib_uverbs_completion_event_file *ev_file, - struct ib_ucq_object *uobj) +void ib_uverbs_release_ucq(struct ib_uverbs_completion_event_file *ev_file, + struct ib_ucq_object *uobj) { struct ib_uverbs_event *evt, *tmp; @@ -150,25 +141,24 @@ void ib_uverbs_release_ucq(struct ib_uverbs_file *file, uverbs_uobject_put(&ev_file->uobj); } - spin_lock_irq(&file->async_file->ev_queue.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->ev_queue.lock); + ib_uverbs_release_uevent(&uobj->uevent); } -void ib_uverbs_release_uevent(struct ib_uverbs_file *file, - struct ib_uevent_object *uobj) +void ib_uverbs_release_uevent(struct ib_uevent_object *uobj) { + struct ib_uverbs_async_event_file *async_file = + READ_ONCE(uobj->uobject.ufile->async_file); struct ib_uverbs_event *evt, *tmp; - spin_lock_irq(&file->async_file->ev_queue.lock); + if (!async_file) + return; + + spin_lock_irq(&async_file->ev_queue.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->ev_queue.lock); + spin_unlock_irq(&async_file->ev_queue.lock); } void ib_uverbs_detach_umcast(struct ib_qp *qp, @@ -208,8 +198,7 @@ void ib_uverbs_release_file(struct kref *ref) ib_uverbs_comp_dev(file->device); if (file->async_file) - kref_put(&file->async_file->ref, - ib_uverbs_release_async_event_file); + uverbs_uobject_put(&file->async_file->uobj); put_device(&file->device->dev); if (file->disassociate_page) @@ -220,7 +209,6 @@ void ib_uverbs_release_file(struct kref *ref) } static ssize_t ib_uverbs_event_read(struct ib_uverbs_event_queue *ev_queue, - struct ib_uverbs_file *uverbs_file, struct file *filp, char __user *buf, size_t count, loff_t *pos, size_t eventsz) @@ -238,19 +226,16 @@ static ssize_t ib_uverbs_event_read(struct ib_uverbs_event_queue *ev_queue, if (wait_event_interruptible(ev_queue->poll_wait, (!list_empty(&ev_queue->event_list) || - /* The barriers built into wait_event_interruptible() - * and wake_up() guarentee this will see the null set - * without using RCU - */ - !uverbs_file->device->ib_dev))) + ev_queue->is_closed))) return -ERESTARTSYS; + spin_lock_irq(&ev_queue->lock); + /* If device was disassociated and no event exists set an error */ - if (list_empty(&ev_queue->event_list) && - !uverbs_file->device->ib_dev) + if (list_empty(&ev_queue->event_list) && ev_queue->is_closed) { + spin_unlock_irq(&ev_queue->lock); return -EIO; - - spin_lock_irq(&ev_queue->lock); + } } event = list_entry(ev_queue->event_list.next, struct ib_uverbs_event, list); @@ -285,8 +270,7 @@ static ssize_t ib_uverbs_async_event_read(struct file *filp, char __user *buf, { struct ib_uverbs_async_event_file *file = filp->private_data; - return ib_uverbs_event_read(&file->ev_queue, file->uverbs_file, filp, - buf, count, pos, + return ib_uverbs_event_read(&file->ev_queue, filp, buf, count, pos, sizeof(struct ib_uverbs_async_event_desc)); } @@ -296,9 +280,8 @@ static ssize_t ib_uverbs_comp_event_read(struct file *filp, char __user *buf, struct ib_uverbs_completion_event_file *comp_ev_file = filp->private_data; - return ib_uverbs_event_read(&comp_ev_file->ev_queue, - comp_ev_file->uobj.ufile, filp, - buf, count, pos, + return ib_uverbs_event_read(&comp_ev_file->ev_queue, filp, buf, count, + pos, sizeof(struct ib_uverbs_comp_event_desc)); } @@ -321,7 +304,9 @@ static __poll_t ib_uverbs_event_poll(struct ib_uverbs_event_queue *ev_queue, static __poll_t ib_uverbs_async_event_poll(struct file *filp, struct poll_table_struct *wait) { - return ib_uverbs_event_poll(filp->private_data, filp, wait); + struct ib_uverbs_async_event_file *file = filp->private_data; + + return ib_uverbs_event_poll(&file->ev_queue, filp, wait); } static __poll_t ib_uverbs_comp_event_poll(struct file *filp, @@ -335,9 +320,9 @@ static __poll_t ib_uverbs_comp_event_poll(struct file *filp, static int ib_uverbs_async_event_fasync(int fd, struct file *filp, int on) { - struct ib_uverbs_event_queue *ev_queue = filp->private_data; + struct ib_uverbs_async_event_file *file = filp->private_data; - return fasync_helper(fd, filp, on, &ev_queue->async_queue); + return fasync_helper(fd, filp, on, &file->ev_queue.async_queue); } static int ib_uverbs_comp_event_fasync(int fd, struct file *filp, int on) @@ -348,70 +333,20 @@ static int ib_uverbs_comp_event_fasync(int fd, struct file *filp, int on) return fasync_helper(fd, filp, on, &comp_ev_file->ev_queue.async_queue); } -static int ib_uverbs_async_event_close(struct inode *inode, struct file *filp) -{ - struct ib_uverbs_async_event_file *file = filp->private_data; - struct ib_uverbs_file *uverbs_file = file->uverbs_file; - struct ib_uverbs_event *entry, *tmp; - int closed_already = 0; - - mutex_lock(&uverbs_file->device->lists_mutex); - spin_lock_irq(&file->ev_queue.lock); - closed_already = file->ev_queue.is_closed; - file->ev_queue.is_closed = 1; - list_for_each_entry_safe(entry, tmp, &file->ev_queue.event_list, list) { - if (entry->counter) - list_del(&entry->obj_list); - kfree(entry); - } - spin_unlock_irq(&file->ev_queue.lock); - if (!closed_already) { - list_del(&file->list); - ib_unregister_event_handler(&uverbs_file->event_handler); - } - mutex_unlock(&uverbs_file->device->lists_mutex); - - kref_put(&uverbs_file->ref, ib_uverbs_release_file); - kref_put(&file->ref, ib_uverbs_release_async_event_file); - - return 0; -} - -static int ib_uverbs_comp_event_close(struct inode *inode, struct file *filp) -{ - struct ib_uobject *uobj = filp->private_data; - struct ib_uverbs_completion_event_file *file = container_of( - uobj, struct ib_uverbs_completion_event_file, uobj); - struct ib_uverbs_event *entry, *tmp; - - spin_lock_irq(&file->ev_queue.lock); - list_for_each_entry_safe(entry, tmp, &file->ev_queue.event_list, list) { - if (entry->counter) - list_del(&entry->obj_list); - kfree(entry); - } - file->ev_queue.is_closed = 1; - spin_unlock_irq(&file->ev_queue.lock); - - uverbs_close_fd(filp); - - return 0; -} - const struct file_operations uverbs_event_fops = { .owner = THIS_MODULE, .read = ib_uverbs_comp_event_read, .poll = ib_uverbs_comp_event_poll, - .release = ib_uverbs_comp_event_close, + .release = uverbs_uobject_fd_release, .fasync = ib_uverbs_comp_event_fasync, .llseek = no_llseek, }; -static const struct file_operations uverbs_async_event_fops = { +const struct file_operations uverbs_async_event_fops = { .owner = THIS_MODULE, .read = ib_uverbs_async_event_read, .poll = ib_uverbs_async_event_poll, - .release = ib_uverbs_async_event_close, + .release = uverbs_uobject_fd_release, .fasync = ib_uverbs_async_event_fasync, .llseek = no_llseek, }; @@ -438,9 +373,9 @@ void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) return; } - uobj = container_of(cq->uobject, struct ib_ucq_object, uobject); + uobj = cq->uobject; - entry->desc.comp.cq_handle = cq->uobject->user_handle; + entry->desc.comp.cq_handle = cq->uobject->uevent.uobject.user_handle; entry->counter = &uobj->comp_events_reported; list_add_tail(&entry->list, &ev_queue->event_list); @@ -451,102 +386,82 @@ void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context) kill_fasync(&ev_queue->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) +static void +ib_uverbs_async_handler(struct ib_uverbs_async_event_file *async_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->ev_queue.lock, flags); - if (file->async_file->ev_queue.is_closed) { - spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags); + if (!async_file) + return; + + spin_lock_irqsave(&async_file->ev_queue.lock, flags); + if (async_file->ev_queue.is_closed) { + spin_unlock_irqrestore(&async_file->ev_queue.lock, flags); return; } entry = kmalloc(sizeof(*entry), GFP_ATOMIC); if (!entry) { - spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags); + spin_unlock_irqrestore(&async_file->ev_queue.lock, flags); return; } - entry->desc.async.element = element; + entry->desc.async.element = element; entry->desc.async.event_type = event; - entry->desc.async.reserved = 0; - entry->counter = counter; + entry->desc.async.reserved = 0; + entry->counter = counter; - list_add_tail(&entry->list, &file->async_file->ev_queue.event_list); + list_add_tail(&entry->list, &async_file->ev_queue.event_list); if (obj_list) list_add_tail(&entry->obj_list, obj_list); - spin_unlock_irqrestore(&file->async_file->ev_queue.lock, flags); + spin_unlock_irqrestore(&async_file->ev_queue.lock, flags); - wake_up_interruptible(&file->async_file->ev_queue.poll_wait); - kill_fasync(&file->async_file->ev_queue.async_queue, SIGIO, POLL_IN); + wake_up_interruptible(&async_file->ev_queue.poll_wait); + kill_fasync(&async_file->ev_queue.async_queue, SIGIO, POLL_IN); } -void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) +static void uverbs_uobj_event(struct ib_uevent_object *eobj, + struct ib_event *event) { - struct ib_ucq_object *uobj = container_of(event->element.cq->uobject, - struct ib_ucq_object, uobject); + ib_uverbs_async_handler(READ_ONCE(eobj->uobject.ufile->async_file), + eobj->uobject.user_handle, event->event, + &eobj->event_list, &eobj->events_reported); +} - ib_uverbs_async_handler(uobj->uobject.ufile, uobj->uobject.user_handle, - event->event, &uobj->async_list, - &uobj->async_events_reported); +void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr) +{ + uverbs_uobj_event(&event->element.cq->uobject->uevent, event); } void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr) { - struct ib_uevent_object *uobj; - /* for XRC target qp's, check that qp is live */ if (!event->element.qp->uobject) return; - 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); + uverbs_uobj_event(&event->element.qp->uobject->uevent, event); } void ib_uverbs_wq_event_handler(struct ib_event *event, void *context_ptr) { - struct ib_uevent_object *uobj = container_of(event->element.wq->uobject, - struct ib_uevent_object, uobject); - - ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle, - event->event, &uobj->event_list, - &uobj->events_reported); + uverbs_uobj_event(&event->element.wq->uobject->uevent, event); } 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); + uverbs_uobj_event(&event->element.srq->uobject->uevent, event); } -void ib_uverbs_free_async_event_file(struct ib_uverbs_file *file) +static void ib_uverbs_event_handler(struct ib_event_handler *handler, + struct ib_event *event) { - kref_put(&file->async_file->ref, ib_uverbs_release_async_event_file); - file->async_file = NULL; + ib_uverbs_async_handler( + container_of(handler, struct ib_uverbs_async_event_file, + event_handler), + event->element.port_num, event->event, NULL, NULL); } void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue) @@ -558,45 +473,26 @@ void ib_uverbs_init_event_queue(struct ib_uverbs_event_queue *ev_queue) ev_queue->async_queue = NULL; } -struct file *ib_uverbs_alloc_async_event_file(struct ib_uverbs_file *uverbs_file, - struct ib_device *ib_dev) +void ib_uverbs_init_async_event_file( + struct ib_uverbs_async_event_file *async_file) { - struct ib_uverbs_async_event_file *ev_file; - struct file *filp; - - ev_file = kzalloc(sizeof(*ev_file), GFP_KERNEL); - if (!ev_file) - return ERR_PTR(-ENOMEM); - - ib_uverbs_init_event_queue(&ev_file->ev_queue); - ev_file->uverbs_file = uverbs_file; - kref_get(&ev_file->uverbs_file->ref); - kref_init(&ev_file->ref); - filp = anon_inode_getfile("[infinibandevent]", &uverbs_async_event_fops, - ev_file, O_RDONLY); - if (IS_ERR(filp)) - goto err_put_refs; - - mutex_lock(&uverbs_file->device->lists_mutex); - list_add_tail(&ev_file->list, - &uverbs_file->device->uverbs_events_file_list); - mutex_unlock(&uverbs_file->device->lists_mutex); - - WARN_ON(uverbs_file->async_file); - uverbs_file->async_file = ev_file; - kref_get(&uverbs_file->async_file->ref); - INIT_IB_EVENT_HANDLER(&uverbs_file->event_handler, - ib_dev, - ib_uverbs_event_handler); - ib_register_event_handler(&uverbs_file->event_handler); - /* At that point async file stuff was fully set */ + struct ib_uverbs_file *uverbs_file = async_file->uobj.ufile; + struct ib_device *ib_dev = async_file->uobj.context->device; + + ib_uverbs_init_event_queue(&async_file->ev_queue); - return filp; + /* The first async_event_file becomes the default one for the file. */ + mutex_lock(&uverbs_file->ucontext_lock); + if (!uverbs_file->async_file) { + /* Pairs with the put in ib_uverbs_release_file */ + uverbs_uobject_get(&async_file->uobj); + smp_store_release(&uverbs_file->async_file, async_file); + } + mutex_unlock(&uverbs_file->ucontext_lock); -err_put_refs: - kref_put(&ev_file->uverbs_file->ref, ib_uverbs_release_file); - kref_put(&ev_file->ref, ib_uverbs_release_async_event_file); - return filp; + INIT_IB_EVENT_HANDLER(&async_file->event_handler, ib_dev, + ib_uverbs_event_handler); + ib_register_event_handler(&async_file->event_handler); } static ssize_t verify_hdr(struct ib_uverbs_cmd_hdr *hdr, @@ -1225,7 +1121,6 @@ static void ib_uverbs_add_one(struct ib_device *device) mutex_init(&uverbs_dev->xrcd_tree_mutex); mutex_init(&uverbs_dev->lists_mutex); INIT_LIST_HEAD(&uverbs_dev->uverbs_file_list); - INIT_LIST_HEAD(&uverbs_dev->uverbs_events_file_list); rcu_assign_pointer(uverbs_dev->ib_dev, device); uverbs_dev->num_comp_vectors = device->num_comp_vectors; @@ -1270,14 +1165,9 @@ static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev, struct ib_device *ib_dev) { struct ib_uverbs_file *file; - struct ib_uverbs_async_event_file *event_file; - struct ib_event event; /* Pending running commands to terminate */ uverbs_disassociate_api_pre(uverbs_dev); - event.event = IB_EVENT_DEVICE_FATAL; - event.element.port_num = 0; - event.device = ib_dev; mutex_lock(&uverbs_dev->lists_mutex); while (!list_empty(&uverbs_dev->uverbs_file_list)) { @@ -1293,31 +1183,14 @@ static void ib_uverbs_free_hw_resources(struct ib_uverbs_device *uverbs_dev, */ mutex_unlock(&uverbs_dev->lists_mutex); - ib_uverbs_event_handler(&file->event_handler, &event); + ib_uverbs_async_handler(READ_ONCE(file->async_file), 0, + IB_EVENT_DEVICE_FATAL, NULL, NULL); + uverbs_destroy_ufile_hw(file, RDMA_REMOVE_DRIVER_REMOVE); kref_put(&file->ref, ib_uverbs_release_file); mutex_lock(&uverbs_dev->lists_mutex); } - - while (!list_empty(&uverbs_dev->uverbs_events_file_list)) { - event_file = list_first_entry(&uverbs_dev-> - uverbs_events_file_list, - struct ib_uverbs_async_event_file, - list); - spin_lock_irq(&event_file->ev_queue.lock); - event_file->ev_queue.is_closed = 1; - spin_unlock_irq(&event_file->ev_queue.lock); - - list_del(&event_file->list); - ib_unregister_event_handler( - &event_file->uverbs_file->event_handler); - event_file->uverbs_file->event_handler.device = - NULL; - - wake_up_interruptible(&event_file->ev_queue.poll_wait); - kill_fasync(&event_file->ev_queue.async_queue, SIGIO, POLL_IN); - } mutex_unlock(&uverbs_dev->lists_mutex); uverbs_disassociate_api(uverbs_dev->uapi); |