[PATCH] IB uverbs: core implementation
Add the core of the InfiniBand userspace verbs implementation, including creating character device nodes, dispatching requests from userspace, and passing event notifications back up to userspace. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland Dreier
Linus Torvalds
parent
8a96b3f9af
commit
bc38a6abdd
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/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: uverbs.h 2559 2005-06-06 19:43:16Z roland $
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*/
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#ifndef UVERBS_H
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#define UVERBS_H
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/* Include device.h and fs.h until cdev.h is self-sufficient */
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/cdev.h>
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#include <linux/kref.h>
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#include <linux/idr.h>
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#include <ib_verbs.h>
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#include <ib_user_verbs.h>
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struct ib_uverbs_device {
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int devnum;
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struct cdev dev;
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struct class_device class_dev;
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struct ib_device *ib_dev;
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int num_comp;
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};
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struct ib_uverbs_event_file {
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struct kref ref;
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struct ib_uverbs_file *uverbs_file;
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spinlock_t lock;
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int fd;
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int is_async;
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wait_queue_head_t poll_wait;
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struct list_head event_list;
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};
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struct ib_uverbs_file {
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struct kref ref;
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struct ib_uverbs_device *device;
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struct ib_ucontext *ucontext;
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struct ib_event_handler event_handler;
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struct ib_uverbs_event_file async_file;
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struct ib_uverbs_event_file comp_file[1];
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};
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struct ib_uverbs_async_event {
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struct ib_uverbs_async_event_desc desc;
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struct list_head list;
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};
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struct ib_uverbs_comp_event {
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struct ib_uverbs_comp_event_desc desc;
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struct list_head list;
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};
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struct ib_uobject_mr {
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struct ib_uobject uobj;
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struct page *page_list;
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struct scatterlist *sg_list;
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};
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extern struct semaphore ib_uverbs_idr_mutex;
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extern struct idr ib_uverbs_pd_idr;
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extern struct idr ib_uverbs_mr_idr;
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extern struct idr ib_uverbs_mw_idr;
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extern struct idr ib_uverbs_ah_idr;
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extern struct idr ib_uverbs_cq_idr;
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extern struct idr ib_uverbs_qp_idr;
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void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context);
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void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr);
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void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr);
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int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
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void *addr, size_t size, int write);
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void ib_umem_release(struct ib_device *dev, struct ib_umem *umem);
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void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);
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#define IB_UVERBS_DECLARE_CMD(name) \
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ssize_t ib_uverbs_##name(struct ib_uverbs_file *file, \
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const char __user *buf, int in_len, \
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int out_len)
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IB_UVERBS_DECLARE_CMD(query_params);
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IB_UVERBS_DECLARE_CMD(get_context);
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IB_UVERBS_DECLARE_CMD(query_device);
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IB_UVERBS_DECLARE_CMD(query_port);
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IB_UVERBS_DECLARE_CMD(query_gid);
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IB_UVERBS_DECLARE_CMD(query_pkey);
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IB_UVERBS_DECLARE_CMD(alloc_pd);
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IB_UVERBS_DECLARE_CMD(dealloc_pd);
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IB_UVERBS_DECLARE_CMD(reg_mr);
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IB_UVERBS_DECLARE_CMD(dereg_mr);
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IB_UVERBS_DECLARE_CMD(create_cq);
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IB_UVERBS_DECLARE_CMD(destroy_cq);
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IB_UVERBS_DECLARE_CMD(create_qp);
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IB_UVERBS_DECLARE_CMD(modify_qp);
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IB_UVERBS_DECLARE_CMD(destroy_qp);
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IB_UVERBS_DECLARE_CMD(attach_mcast);
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IB_UVERBS_DECLARE_CMD(detach_mcast);
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#endif /* UVERBS_H */
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,698 @@
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/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Cisco Systems. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
|
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|
* General Public License (GPL) Version 2, available from the file
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|
* COPYING in the main directory of this source tree, or the
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|
* OpenIB.org BSD license below:
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|
*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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|
* conditions are met:
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*
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* - Redistributions of source code must retain the above
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|
* copyright notice, this list of conditions and the following
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||||||
|
* disclaimer.
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|
*
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|
* - Redistributions in binary form must reproduce the above
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|
* copyright notice, this list of conditions and the following
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||||||
|
* disclaimer in the documentation and/or other materials
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|
* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/file.h>
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#include <linux/mount.h>
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#include <asm/uaccess.h>
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#include "uverbs.h"
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("InfiniBand userspace verbs access");
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MODULE_LICENSE("Dual BSD/GPL");
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#define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
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enum {
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IB_UVERBS_MAJOR = 231,
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IB_UVERBS_BASE_MINOR = 192,
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IB_UVERBS_MAX_DEVICES = 32
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};
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#define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
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DECLARE_MUTEX(ib_uverbs_idr_mutex);
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DEFINE_IDR(ib_uverbs_pd_idr);
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DEFINE_IDR(ib_uverbs_mr_idr);
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DEFINE_IDR(ib_uverbs_mw_idr);
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DEFINE_IDR(ib_uverbs_ah_idr);
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DEFINE_IDR(ib_uverbs_cq_idr);
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DEFINE_IDR(ib_uverbs_qp_idr);
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static spinlock_t map_lock;
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static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
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static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
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const char __user *buf, int in_len,
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int out_len) = {
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[IB_USER_VERBS_CMD_QUERY_PARAMS] = ib_uverbs_query_params,
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[IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
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[IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
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[IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
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[IB_USER_VERBS_CMD_QUERY_GID] = ib_uverbs_query_gid,
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[IB_USER_VERBS_CMD_QUERY_PKEY] = ib_uverbs_query_pkey,
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[IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
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[IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
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[IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
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[IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
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[IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
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[IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
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[IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
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[IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
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[IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
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[IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
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[IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
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};
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static struct vfsmount *uverbs_event_mnt;
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static void ib_uverbs_add_one(struct ib_device *device);
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static void ib_uverbs_remove_one(struct ib_device *device);
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static int ib_dealloc_ucontext(struct ib_ucontext *context)
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{
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struct ib_uobject *uobj, *tmp;
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if (!context)
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return 0;
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down(&ib_uverbs_idr_mutex);
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/* XXX Free AHs */
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list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
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struct ib_qp *qp = idr_find(&ib_uverbs_qp_idr, uobj->id);
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idr_remove(&ib_uverbs_qp_idr, uobj->id);
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ib_destroy_qp(qp);
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list_del(&uobj->list);
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kfree(uobj);
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}
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list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
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struct ib_cq *cq = idr_find(&ib_uverbs_cq_idr, uobj->id);
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idr_remove(&ib_uverbs_cq_idr, uobj->id);
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ib_destroy_cq(cq);
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list_del(&uobj->list);
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kfree(uobj);
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}
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/* XXX Free SRQs */
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/* XXX Free MWs */
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list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
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struct ib_mr *mr = idr_find(&ib_uverbs_mr_idr, uobj->id);
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struct ib_umem_object *memobj;
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idr_remove(&ib_uverbs_mr_idr, uobj->id);
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ib_dereg_mr(mr);
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memobj = container_of(uobj, struct ib_umem_object, uobject);
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ib_umem_release_on_close(mr->device, &memobj->umem);
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list_del(&uobj->list);
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kfree(memobj);
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}
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list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
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struct ib_pd *pd = idr_find(&ib_uverbs_pd_idr, uobj->id);
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idr_remove(&ib_uverbs_pd_idr, uobj->id);
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ib_dealloc_pd(pd);
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list_del(&uobj->list);
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kfree(uobj);
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}
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up(&ib_uverbs_idr_mutex);
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return context->device->dealloc_ucontext(context);
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}
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static void ib_uverbs_release_file(struct kref *ref)
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{
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struct ib_uverbs_file *file =
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container_of(ref, struct ib_uverbs_file, ref);
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module_put(file->device->ib_dev->owner);
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kfree(file);
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}
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static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
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size_t count, loff_t *pos)
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{
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struct ib_uverbs_event_file *file = filp->private_data;
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void *event;
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int eventsz;
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int ret = 0;
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spin_lock_irq(&file->lock);
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while (list_empty(&file->event_list) && file->fd >= 0) {
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spin_unlock_irq(&file->lock);
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if (filp->f_flags & O_NONBLOCK)
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return -EAGAIN;
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if (wait_event_interruptible(file->poll_wait,
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!list_empty(&file->event_list) ||
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file->fd < 0))
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return -ERESTARTSYS;
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spin_lock_irq(&file->lock);
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}
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if (file->fd < 0) {
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spin_unlock_irq(&file->lock);
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return -ENODEV;
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}
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if (file->is_async) {
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event = list_entry(file->event_list.next,
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struct ib_uverbs_async_event, list);
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eventsz = sizeof (struct ib_uverbs_async_event_desc);
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} else {
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event = list_entry(file->event_list.next,
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struct ib_uverbs_comp_event, list);
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eventsz = sizeof (struct ib_uverbs_comp_event_desc);
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}
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if (eventsz > count) {
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ret = -EINVAL;
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event = NULL;
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} else
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list_del(file->event_list.next);
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spin_unlock_irq(&file->lock);
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if (event) {
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if (copy_to_user(buf, event, eventsz))
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ret = -EFAULT;
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else
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|
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;
|
||||||
|
|
||||||
|
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))
|
||||||
|
pollflags = POLLIN | POLLRDNORM;
|
||||||
|
spin_unlock_irq(&file->lock);
|
||||||
|
|
||||||
|
return pollflags;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void ib_uverbs_event_release(struct ib_uverbs_event_file *file)
|
||||||
|
{
|
||||||
|
struct list_head *entry, *tmp;
|
||||||
|
|
||||||
|
spin_lock_irq(&file->lock);
|
||||||
|
if (file->fd != -1) {
|
||||||
|
file->fd = -1;
|
||||||
|
list_for_each_safe(entry, tmp, &file->event_list)
|
||||||
|
if (file->is_async)
|
||||||
|
kfree(list_entry(entry, struct ib_uverbs_async_event, list));
|
||||||
|
else
|
||||||
|
kfree(list_entry(entry, struct ib_uverbs_comp_event, list));
|
||||||
|
}
|
||||||
|
spin_unlock_irq(&file->lock);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
|
||||||
|
{
|
||||||
|
struct ib_uverbs_event_file *file = filp->private_data;
|
||||||
|
|
||||||
|
ib_uverbs_event_release(file);
|
||||||
|
kref_put(&file->uverbs_file->ref, ib_uverbs_release_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.
|
||||||
|
*/
|
||||||
|
.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_uverbs_comp_event *entry;
|
||||||
|
unsigned long flags;
|
||||||
|
|
||||||
|
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
|
||||||
|
if (!entry)
|
||||||
|
return;
|
||||||
|
|
||||||
|
entry->desc.cq_handle = cq->uobject->user_handle;
|
||||||
|
|
||||||
|
spin_lock_irqsave(&file->comp_file[0].lock, flags);
|
||||||
|
list_add_tail(&entry->list, &file->comp_file[0].event_list);
|
||||||
|
spin_unlock_irqrestore(&file->comp_file[0].lock, flags);
|
||||||
|
|
||||||
|
wake_up_interruptible(&file->comp_file[0].poll_wait);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
|
||||||
|
__u64 element, __u64 event)
|
||||||
|
{
|
||||||
|
struct ib_uverbs_async_event *entry;
|
||||||
|
unsigned long flags;
|
||||||
|
|
||||||
|
entry = kmalloc(sizeof *entry, GFP_ATOMIC);
|
||||||
|
if (!entry)
|
||||||
|
return;
|
||||||
|
|
||||||
|
entry->desc.element = element;
|
||||||
|
entry->desc.event_type = event;
|
||||||
|
|
||||||
|
spin_lock_irqsave(&file->async_file.lock, flags);
|
||||||
|
list_add_tail(&entry->list, &file->async_file.event_list);
|
||||||
|
spin_unlock_irqrestore(&file->async_file.lock, flags);
|
||||||
|
|
||||||
|
wake_up_interruptible(&file->async_file.poll_wait);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
|
||||||
|
{
|
||||||
|
ib_uverbs_async_handler(context_ptr,
|
||||||
|
event->element.cq->uobject->user_handle,
|
||||||
|
event->event);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
|
||||||
|
{
|
||||||
|
ib_uverbs_async_handler(context_ptr,
|
||||||
|
event->element.qp->uobject->user_handle,
|
||||||
|
event->event);
|
||||||
|
}
|
||||||
|
|
||||||
|
static 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);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ib_uverbs_event_init(struct ib_uverbs_event_file *file,
|
||||||
|
struct ib_uverbs_file *uverbs_file)
|
||||||
|
{
|
||||||
|
struct file *filp;
|
||||||
|
|
||||||
|
spin_lock_init(&file->lock);
|
||||||
|
INIT_LIST_HEAD(&file->event_list);
|
||||||
|
init_waitqueue_head(&file->poll_wait);
|
||||||
|
file->uverbs_file = uverbs_file;
|
||||||
|
|
||||||
|
file->fd = get_unused_fd();
|
||||||
|
if (file->fd < 0)
|
||||||
|
return file->fd;
|
||||||
|
|
||||||
|
filp = get_empty_filp();
|
||||||
|
if (!filp) {
|
||||||
|
put_unused_fd(file->fd);
|
||||||
|
return -ENFILE;
|
||||||
|
}
|
||||||
|
|
||||||
|
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;
|
||||||
|
|
||||||
|
fd_install(file->fd, filp);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
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))
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
if (!file->ucontext &&
|
||||||
|
hdr.command != IB_USER_VERBS_CMD_QUERY_PARAMS &&
|
||||||
|
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);
|
||||||
|
}
|
||||||
|
|
||||||
|
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_file *file;
|
||||||
|
int i = 0;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (!try_module_get(dev->ib_dev->owner))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
file = kmalloc(sizeof *file +
|
||||||
|
(dev->num_comp - 1) * sizeof (struct ib_uverbs_event_file),
|
||||||
|
GFP_KERNEL);
|
||||||
|
if (!file)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
file->device = dev;
|
||||||
|
kref_init(&file->ref);
|
||||||
|
|
||||||
|
file->ucontext = NULL;
|
||||||
|
|
||||||
|
ret = ib_uverbs_event_init(&file->async_file, file);
|
||||||
|
if (ret)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
file->async_file.is_async = 1;
|
||||||
|
|
||||||
|
kref_get(&file->ref);
|
||||||
|
|
||||||
|
for (i = 0; i < dev->num_comp; ++i) {
|
||||||
|
ret = ib_uverbs_event_init(&file->comp_file[i], file);
|
||||||
|
if (ret)
|
||||||
|
goto err_async;
|
||||||
|
kref_get(&file->ref);
|
||||||
|
file->comp_file[i].is_async = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
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_put(&file->ref, ib_uverbs_release_file);
|
||||||
|
|
||||||
|
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);
|
||||||
|
|
||||||
|
for (i = 0; i < file->device->num_comp; ++i)
|
||||||
|
ib_uverbs_event_release(&file->comp_file[i]);
|
||||||
|
|
||||||
|
kref_put(&file->ref, ib_uverbs_release_file);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static 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 = {
|
||||||
|
.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 class_device *class_dev, char *buf)
|
||||||
|
{
|
||||||
|
struct ib_uverbs_device *dev =
|
||||||
|
container_of(class_dev, struct ib_uverbs_device, class_dev);
|
||||||
|
|
||||||
|
return sprintf(buf, "%s\n", dev->ib_dev->name);
|
||||||
|
}
|
||||||
|
static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
|
||||||
|
|
||||||
|
static void ib_uverbs_release_class_dev(struct class_device *class_dev)
|
||||||
|
{
|
||||||
|
struct ib_uverbs_device *dev =
|
||||||
|
container_of(class_dev, struct ib_uverbs_device, class_dev);
|
||||||
|
|
||||||
|
cdev_del(&dev->dev);
|
||||||
|
clear_bit(dev->devnum, dev_map);
|
||||||
|
kfree(dev);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct class uverbs_class = {
|
||||||
|
.name = "infiniband_verbs",
|
||||||
|
.release = ib_uverbs_release_class_dev
|
||||||
|
};
|
||||||
|
|
||||||
|
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);
|
||||||
|
|
||||||
|
static void ib_uverbs_add_one(struct ib_device *device)
|
||||||
|
{
|
||||||
|
struct ib_uverbs_device *uverbs_dev;
|
||||||
|
|
||||||
|
if (!device->alloc_ucontext)
|
||||||
|
return;
|
||||||
|
|
||||||
|
uverbs_dev = kmalloc(sizeof *uverbs_dev, GFP_KERNEL);
|
||||||
|
if (!uverbs_dev)
|
||||||
|
return;
|
||||||
|
|
||||||
|
memset(uverbs_dev, 0, sizeof *uverbs_dev);
|
||||||
|
|
||||||
|
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 = 1;
|
||||||
|
|
||||||
|
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))
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
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))
|
||||||
|
goto err_cdev;
|
||||||
|
|
||||||
|
if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_ibdev))
|
||||||
|
goto err_class;
|
||||||
|
|
||||||
|
ib_set_client_data(device, &uverbs_client, uverbs_dev);
|
||||||
|
|
||||||
|
return;
|
||||||
|
|
||||||
|
err_class:
|
||||||
|
class_device_unregister(&uverbs_dev->class_dev);
|
||||||
|
|
||||||
|
err_cdev:
|
||||||
|
cdev_del(&uverbs_dev->dev);
|
||||||
|
clear_bit(uverbs_dev->devnum, dev_map);
|
||||||
|
|
||||||
|
err:
|
||||||
|
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;
|
||||||
|
|
||||||
|
class_device_unregister(&uverbs_dev->class_dev);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct super_block *uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
|
||||||
|
const char *dev_name, void *data)
|
||||||
|
{
|
||||||
|
return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
|
||||||
|
INFINIBANDEVENTFS_MAGIC);
|
||||||
|
}
|
||||||
|
|
||||||
|
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
|
||||||
|
};
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = class_register(&uverbs_class);
|
||||||
|
if (ret) {
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
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:
|
||||||
|
mntput(uverbs_event_mnt);
|
||||||
|
|
||||||
|
out_fs:
|
||||||
|
unregister_filesystem(&uverbs_event_fs);
|
||||||
|
|
||||||
|
out_class:
|
||||||
|
class_unregister(&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);
|
||||||
|
mntput(uverbs_event_mnt);
|
||||||
|
unregister_filesystem(&uverbs_event_fs);
|
||||||
|
class_unregister(&uverbs_class);
|
||||||
|
unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(ib_uverbs_init);
|
||||||
|
module_exit(ib_uverbs_cleanup);
|
||||||
Loading…
Reference in New Issue