1322 строки
33 KiB
C
1322 строки
33 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. 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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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/netdevice.h>
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#include <linux/security.h>
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#include <linux/notifier.h>
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#include <rdma/rdma_netlink.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_cache.h>
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#include "core_priv.h"
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("core kernel InfiniBand API");
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MODULE_LICENSE("Dual BSD/GPL");
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struct ib_client_data {
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struct list_head list;
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struct ib_client *client;
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void * data;
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/* The device or client is going down. Do not call client or device
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* callbacks other than remove(). */
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bool going_down;
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};
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struct workqueue_struct *ib_comp_wq;
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struct workqueue_struct *ib_comp_unbound_wq;
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struct workqueue_struct *ib_wq;
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EXPORT_SYMBOL_GPL(ib_wq);
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/* The device_list and client_list contain devices and clients after their
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* registration has completed, and the devices and clients are removed
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* during unregistration. */
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static LIST_HEAD(device_list);
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static LIST_HEAD(client_list);
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/*
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* device_mutex and lists_rwsem protect access to both device_list and
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* client_list. device_mutex protects writer access by device and client
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* registration / de-registration. lists_rwsem protects reader access to
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* these lists. Iterators of these lists must lock it for read, while updates
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* to the lists must be done with a write lock. A special case is when the
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* device_mutex is locked. In this case locking the lists for read access is
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* not necessary as the device_mutex implies it.
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*
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* lists_rwsem also protects access to the client data list.
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*/
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static DEFINE_MUTEX(device_mutex);
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static DECLARE_RWSEM(lists_rwsem);
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static int ib_security_change(struct notifier_block *nb, unsigned long event,
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void *lsm_data);
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static void ib_policy_change_task(struct work_struct *work);
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static DECLARE_WORK(ib_policy_change_work, ib_policy_change_task);
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static struct notifier_block ibdev_lsm_nb = {
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.notifier_call = ib_security_change,
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};
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static int ib_device_check_mandatory(struct ib_device *device)
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{
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#define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
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static const struct {
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size_t offset;
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char *name;
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} mandatory_table[] = {
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IB_MANDATORY_FUNC(query_device),
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IB_MANDATORY_FUNC(query_port),
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IB_MANDATORY_FUNC(query_pkey),
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IB_MANDATORY_FUNC(alloc_pd),
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IB_MANDATORY_FUNC(dealloc_pd),
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IB_MANDATORY_FUNC(create_qp),
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IB_MANDATORY_FUNC(modify_qp),
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IB_MANDATORY_FUNC(destroy_qp),
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IB_MANDATORY_FUNC(post_send),
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IB_MANDATORY_FUNC(post_recv),
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IB_MANDATORY_FUNC(create_cq),
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IB_MANDATORY_FUNC(destroy_cq),
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IB_MANDATORY_FUNC(poll_cq),
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IB_MANDATORY_FUNC(req_notify_cq),
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IB_MANDATORY_FUNC(get_dma_mr),
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IB_MANDATORY_FUNC(dereg_mr),
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IB_MANDATORY_FUNC(get_port_immutable)
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};
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int i;
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for (i = 0; i < ARRAY_SIZE(mandatory_table); ++i) {
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if (!*(void **) ((void *) device + mandatory_table[i].offset)) {
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dev_warn(&device->dev,
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"Device is missing mandatory function %s\n",
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mandatory_table[i].name);
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return -EINVAL;
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}
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}
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return 0;
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}
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static struct ib_device *__ib_device_get_by_index(u32 index)
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{
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struct ib_device *device;
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list_for_each_entry(device, &device_list, core_list)
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if (device->index == index)
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return device;
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return NULL;
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}
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/*
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* Caller is responsible to return refrerence count by calling put_device()
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*/
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struct ib_device *ib_device_get_by_index(u32 index)
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{
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struct ib_device *device;
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down_read(&lists_rwsem);
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device = __ib_device_get_by_index(index);
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if (device)
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get_device(&device->dev);
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up_read(&lists_rwsem);
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return device;
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}
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static struct ib_device *__ib_device_get_by_name(const char *name)
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{
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struct ib_device *device;
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list_for_each_entry(device, &device_list, core_list)
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if (!strcmp(name, dev_name(&device->dev)))
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return device;
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return NULL;
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}
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int ib_device_rename(struct ib_device *ibdev, const char *name)
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{
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struct ib_device *device;
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int ret = 0;
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if (!strcmp(name, dev_name(&ibdev->dev)))
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return ret;
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mutex_lock(&device_mutex);
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list_for_each_entry(device, &device_list, core_list) {
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if (!strcmp(name, dev_name(&device->dev))) {
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ret = -EEXIST;
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goto out;
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}
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}
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ret = device_rename(&ibdev->dev, name);
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if (ret)
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goto out;
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strlcpy(ibdev->name, name, IB_DEVICE_NAME_MAX);
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out:
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mutex_unlock(&device_mutex);
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return ret;
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}
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static int alloc_name(struct ib_device *ibdev, const char *name)
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{
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unsigned long *inuse;
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struct ib_device *device;
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int i;
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inuse = (unsigned long *) get_zeroed_page(GFP_KERNEL);
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if (!inuse)
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return -ENOMEM;
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list_for_each_entry(device, &device_list, core_list) {
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char buf[IB_DEVICE_NAME_MAX];
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if (sscanf(dev_name(&device->dev), name, &i) != 1)
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continue;
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if (i < 0 || i >= PAGE_SIZE * 8)
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continue;
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snprintf(buf, sizeof buf, name, i);
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if (!strcmp(buf, dev_name(&device->dev)))
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set_bit(i, inuse);
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}
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i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
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free_page((unsigned long) inuse);
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return dev_set_name(&ibdev->dev, name, i);
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}
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static void ib_device_release(struct device *device)
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{
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struct ib_device *dev = container_of(device, struct ib_device, dev);
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WARN_ON(dev->reg_state == IB_DEV_REGISTERED);
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if (dev->reg_state == IB_DEV_UNREGISTERED) {
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/*
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* In IB_DEV_UNINITIALIZED state, cache or port table
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* is not even created. Free cache and port table only when
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* device reaches UNREGISTERED state.
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*/
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ib_cache_release_one(dev);
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kfree(dev->port_immutable);
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}
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kfree(dev);
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}
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static int ib_device_uevent(struct device *device,
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struct kobj_uevent_env *env)
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{
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if (add_uevent_var(env, "NAME=%s", dev_name(device)))
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return -ENOMEM;
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/*
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* It would be nice to pass the node GUID with the event...
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*/
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return 0;
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}
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static struct class ib_class = {
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.name = "infiniband",
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.dev_release = ib_device_release,
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.dev_uevent = ib_device_uevent,
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};
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/**
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* ib_alloc_device - allocate an IB device struct
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* @size:size of structure to allocate
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*
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* Low-level drivers should use ib_alloc_device() to allocate &struct
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* ib_device. @size is the size of the structure to be allocated,
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* including any private data used by the low-level driver.
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* ib_dealloc_device() must be used to free structures allocated with
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* ib_alloc_device().
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*/
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struct ib_device *ib_alloc_device(size_t size)
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{
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struct ib_device *device;
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if (WARN_ON(size < sizeof(struct ib_device)))
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return NULL;
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device = kzalloc(size, GFP_KERNEL);
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if (!device)
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return NULL;
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rdma_restrack_init(&device->res);
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device->dev.class = &ib_class;
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device_initialize(&device->dev);
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dev_set_drvdata(&device->dev, device);
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INIT_LIST_HEAD(&device->event_handler_list);
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spin_lock_init(&device->event_handler_lock);
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rwlock_init(&device->client_data_lock);
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INIT_LIST_HEAD(&device->client_data_list);
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INIT_LIST_HEAD(&device->port_list);
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return device;
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}
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EXPORT_SYMBOL(ib_alloc_device);
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/**
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* ib_dealloc_device - free an IB device struct
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* @device:structure to free
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*
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* Free a structure allocated with ib_alloc_device().
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*/
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void ib_dealloc_device(struct ib_device *device)
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{
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WARN_ON(!list_empty(&device->client_data_list));
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WARN_ON(device->reg_state != IB_DEV_UNREGISTERED &&
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device->reg_state != IB_DEV_UNINITIALIZED);
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rdma_restrack_clean(&device->res);
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put_device(&device->dev);
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}
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EXPORT_SYMBOL(ib_dealloc_device);
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static int add_client_context(struct ib_device *device, struct ib_client *client)
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{
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struct ib_client_data *context;
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context = kmalloc(sizeof(*context), GFP_KERNEL);
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if (!context)
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return -ENOMEM;
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context->client = client;
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context->data = NULL;
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context->going_down = false;
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down_write(&lists_rwsem);
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write_lock_irq(&device->client_data_lock);
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list_add(&context->list, &device->client_data_list);
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write_unlock_irq(&device->client_data_lock);
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up_write(&lists_rwsem);
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return 0;
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}
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static int verify_immutable(const struct ib_device *dev, u8 port)
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{
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return WARN_ON(!rdma_cap_ib_mad(dev, port) &&
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rdma_max_mad_size(dev, port) != 0);
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}
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static int read_port_immutable(struct ib_device *device)
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{
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int ret;
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u8 start_port = rdma_start_port(device);
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u8 end_port = rdma_end_port(device);
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u8 port;
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/**
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* device->port_immutable is indexed directly by the port number to make
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* access to this data as efficient as possible.
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*
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* Therefore port_immutable is declared as a 1 based array with
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* potential empty slots at the beginning.
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*/
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device->port_immutable = kcalloc(end_port + 1,
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sizeof(*device->port_immutable),
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GFP_KERNEL);
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if (!device->port_immutable)
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return -ENOMEM;
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for (port = start_port; port <= end_port; ++port) {
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ret = device->get_port_immutable(device, port,
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&device->port_immutable[port]);
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if (ret)
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return ret;
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if (verify_immutable(device, port))
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return -EINVAL;
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}
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return 0;
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}
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void ib_get_device_fw_str(struct ib_device *dev, char *str)
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{
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if (dev->get_dev_fw_str)
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dev->get_dev_fw_str(dev, str);
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else
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str[0] = '\0';
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}
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EXPORT_SYMBOL(ib_get_device_fw_str);
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static int setup_port_pkey_list(struct ib_device *device)
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{
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int i;
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/**
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* device->port_pkey_list is indexed directly by the port number,
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* Therefore it is declared as a 1 based array with potential empty
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* slots at the beginning.
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*/
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device->port_pkey_list = kcalloc(rdma_end_port(device) + 1,
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sizeof(*device->port_pkey_list),
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GFP_KERNEL);
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if (!device->port_pkey_list)
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return -ENOMEM;
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for (i = 0; i < (rdma_end_port(device) + 1); i++) {
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spin_lock_init(&device->port_pkey_list[i].list_lock);
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INIT_LIST_HEAD(&device->port_pkey_list[i].pkey_list);
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}
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return 0;
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}
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static void ib_policy_change_task(struct work_struct *work)
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{
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struct ib_device *dev;
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down_read(&lists_rwsem);
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list_for_each_entry(dev, &device_list, core_list) {
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int i;
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for (i = rdma_start_port(dev); i <= rdma_end_port(dev); i++) {
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u64 sp;
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int ret = ib_get_cached_subnet_prefix(dev,
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i,
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&sp);
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WARN_ONCE(ret,
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"ib_get_cached_subnet_prefix err: %d, this should never happen here\n",
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ret);
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if (!ret)
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ib_security_cache_change(dev, i, sp);
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}
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}
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up_read(&lists_rwsem);
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}
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static int ib_security_change(struct notifier_block *nb, unsigned long event,
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void *lsm_data)
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{
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if (event != LSM_POLICY_CHANGE)
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return NOTIFY_DONE;
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schedule_work(&ib_policy_change_work);
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return NOTIFY_OK;
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}
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/**
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* __dev_new_index - allocate an device index
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*
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* Returns a suitable unique value for a new device interface
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* number. It assumes that there are less than 2^32-1 ib devices
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* will be present in the system.
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*/
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static u32 __dev_new_index(void)
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{
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/*
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* The device index to allow stable naming.
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* Similar to struct net -> ifindex.
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*/
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static u32 index;
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for (;;) {
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if (!(++index))
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index = 1;
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if (!__ib_device_get_by_index(index))
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return index;
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}
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}
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static void setup_dma_device(struct ib_device *device)
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{
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struct device *parent = device->dev.parent;
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WARN_ON_ONCE(device->dma_device);
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if (device->dev.dma_ops) {
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/*
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* The caller provided custom DMA operations. Copy the
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* DMA-related fields that are used by e.g. dma_alloc_coherent()
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* into device->dev.
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*/
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device->dma_device = &device->dev;
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if (!device->dev.dma_mask) {
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if (parent)
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device->dev.dma_mask = parent->dma_mask;
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else
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WARN_ON_ONCE(true);
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}
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if (!device->dev.coherent_dma_mask) {
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if (parent)
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device->dev.coherent_dma_mask =
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parent->coherent_dma_mask;
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else
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WARN_ON_ONCE(true);
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}
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} else {
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/*
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* The caller did not provide custom DMA operations. Use the
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* DMA mapping operations of the parent device.
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*/
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WARN_ON_ONCE(!parent);
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device->dma_device = parent;
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}
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}
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static void cleanup_device(struct ib_device *device)
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{
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ib_cache_cleanup_one(device);
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ib_cache_release_one(device);
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kfree(device->port_pkey_list);
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kfree(device->port_immutable);
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}
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static int setup_device(struct ib_device *device)
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{
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struct ib_udata uhw = {.outlen = 0, .inlen = 0};
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int ret;
|
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|
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ret = ib_device_check_mandatory(device);
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if (ret)
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return ret;
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|
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ret = read_port_immutable(device);
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if (ret) {
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dev_warn(&device->dev,
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"Couldn't create per port immutable data\n");
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return ret;
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}
|
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|
|
memset(&device->attrs, 0, sizeof(device->attrs));
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ret = device->query_device(device, &device->attrs, &uhw);
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if (ret) {
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dev_warn(&device->dev,
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"Couldn't query the device attributes\n");
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goto port_cleanup;
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}
|
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|
|
ret = setup_port_pkey_list(device);
|
|
if (ret) {
|
|
dev_warn(&device->dev, "Couldn't create per port_pkey_list\n");
|
|
goto port_cleanup;
|
|
}
|
|
|
|
ret = ib_cache_setup_one(device);
|
|
if (ret) {
|
|
dev_warn(&device->dev,
|
|
"Couldn't set up InfiniBand P_Key/GID cache\n");
|
|
goto pkey_cleanup;
|
|
}
|
|
return 0;
|
|
|
|
pkey_cleanup:
|
|
kfree(device->port_pkey_list);
|
|
port_cleanup:
|
|
kfree(device->port_immutable);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ib_register_device - Register an IB device with IB core
|
|
* @device:Device to register
|
|
*
|
|
* Low-level drivers use ib_register_device() to register their
|
|
* devices with the IB core. All registered clients will receive a
|
|
* callback for each device that is added. @device must be allocated
|
|
* with ib_alloc_device().
|
|
*/
|
|
int ib_register_device(struct ib_device *device, const char *name,
|
|
int (*port_callback)(struct ib_device *, u8,
|
|
struct kobject *))
|
|
{
|
|
int ret;
|
|
struct ib_client *client;
|
|
|
|
setup_dma_device(device);
|
|
|
|
mutex_lock(&device_mutex);
|
|
|
|
if (strchr(name, '%')) {
|
|
ret = alloc_name(device, name);
|
|
if (ret)
|
|
goto out;
|
|
} else {
|
|
ret = dev_set_name(&device->dev, name);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
if (__ib_device_get_by_name(dev_name(&device->dev))) {
|
|
ret = -ENFILE;
|
|
goto out;
|
|
}
|
|
strlcpy(device->name, dev_name(&device->dev), IB_DEVICE_NAME_MAX);
|
|
|
|
ret = setup_device(device);
|
|
if (ret)
|
|
goto out;
|
|
|
|
device->index = __dev_new_index();
|
|
|
|
ret = ib_device_register_rdmacg(device);
|
|
if (ret) {
|
|
dev_warn(&device->dev,
|
|
"Couldn't register device with rdma cgroup\n");
|
|
goto dev_cleanup;
|
|
}
|
|
|
|
ret = ib_device_register_sysfs(device, port_callback);
|
|
if (ret) {
|
|
dev_warn(&device->dev,
|
|
"Couldn't register device with driver model\n");
|
|
goto cg_cleanup;
|
|
}
|
|
|
|
device->reg_state = IB_DEV_REGISTERED;
|
|
|
|
list_for_each_entry(client, &client_list, list)
|
|
if (!add_client_context(device, client) && client->add)
|
|
client->add(device);
|
|
|
|
down_write(&lists_rwsem);
|
|
list_add_tail(&device->core_list, &device_list);
|
|
up_write(&lists_rwsem);
|
|
mutex_unlock(&device_mutex);
|
|
return 0;
|
|
|
|
cg_cleanup:
|
|
ib_device_unregister_rdmacg(device);
|
|
dev_cleanup:
|
|
cleanup_device(device);
|
|
out:
|
|
mutex_unlock(&device_mutex);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_register_device);
|
|
|
|
/**
|
|
* ib_unregister_device - Unregister an IB device
|
|
* @device:Device to unregister
|
|
*
|
|
* Unregister an IB device. All clients will receive a remove callback.
|
|
*/
|
|
void ib_unregister_device(struct ib_device *device)
|
|
{
|
|
struct ib_client_data *context, *tmp;
|
|
unsigned long flags;
|
|
|
|
mutex_lock(&device_mutex);
|
|
|
|
down_write(&lists_rwsem);
|
|
list_del(&device->core_list);
|
|
write_lock_irq(&device->client_data_lock);
|
|
list_for_each_entry(context, &device->client_data_list, list)
|
|
context->going_down = true;
|
|
write_unlock_irq(&device->client_data_lock);
|
|
downgrade_write(&lists_rwsem);
|
|
|
|
list_for_each_entry(context, &device->client_data_list, list) {
|
|
if (context->client->remove)
|
|
context->client->remove(device, context->data);
|
|
}
|
|
up_read(&lists_rwsem);
|
|
|
|
ib_device_unregister_sysfs(device);
|
|
ib_device_unregister_rdmacg(device);
|
|
|
|
mutex_unlock(&device_mutex);
|
|
|
|
ib_cache_cleanup_one(device);
|
|
|
|
ib_security_destroy_port_pkey_list(device);
|
|
kfree(device->port_pkey_list);
|
|
|
|
down_write(&lists_rwsem);
|
|
write_lock_irqsave(&device->client_data_lock, flags);
|
|
list_for_each_entry_safe(context, tmp, &device->client_data_list,
|
|
list) {
|
|
list_del(&context->list);
|
|
kfree(context);
|
|
}
|
|
write_unlock_irqrestore(&device->client_data_lock, flags);
|
|
up_write(&lists_rwsem);
|
|
|
|
device->reg_state = IB_DEV_UNREGISTERED;
|
|
}
|
|
EXPORT_SYMBOL(ib_unregister_device);
|
|
|
|
/**
|
|
* ib_register_client - Register an IB client
|
|
* @client:Client to register
|
|
*
|
|
* Upper level users of the IB drivers can use ib_register_client() to
|
|
* register callbacks for IB device addition and removal. When an IB
|
|
* device is added, each registered client's add method will be called
|
|
* (in the order the clients were registered), and when a device is
|
|
* removed, each client's remove method will be called (in the reverse
|
|
* order that clients were registered). In addition, when
|
|
* ib_register_client() is called, the client will receive an add
|
|
* callback for all devices already registered.
|
|
*/
|
|
int ib_register_client(struct ib_client *client)
|
|
{
|
|
struct ib_device *device;
|
|
|
|
mutex_lock(&device_mutex);
|
|
|
|
list_for_each_entry(device, &device_list, core_list)
|
|
if (!add_client_context(device, client) && client->add)
|
|
client->add(device);
|
|
|
|
down_write(&lists_rwsem);
|
|
list_add_tail(&client->list, &client_list);
|
|
up_write(&lists_rwsem);
|
|
|
|
mutex_unlock(&device_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_register_client);
|
|
|
|
/**
|
|
* ib_unregister_client - Unregister an IB client
|
|
* @client:Client to unregister
|
|
*
|
|
* Upper level users use ib_unregister_client() to remove their client
|
|
* registration. When ib_unregister_client() is called, the client
|
|
* will receive a remove callback for each IB device still registered.
|
|
*/
|
|
void ib_unregister_client(struct ib_client *client)
|
|
{
|
|
struct ib_client_data *context;
|
|
struct ib_device *device;
|
|
|
|
mutex_lock(&device_mutex);
|
|
|
|
down_write(&lists_rwsem);
|
|
list_del(&client->list);
|
|
up_write(&lists_rwsem);
|
|
|
|
list_for_each_entry(device, &device_list, core_list) {
|
|
struct ib_client_data *found_context = NULL;
|
|
|
|
down_write(&lists_rwsem);
|
|
write_lock_irq(&device->client_data_lock);
|
|
list_for_each_entry(context, &device->client_data_list, list)
|
|
if (context->client == client) {
|
|
context->going_down = true;
|
|
found_context = context;
|
|
break;
|
|
}
|
|
write_unlock_irq(&device->client_data_lock);
|
|
up_write(&lists_rwsem);
|
|
|
|
if (client->remove)
|
|
client->remove(device, found_context ?
|
|
found_context->data : NULL);
|
|
|
|
if (!found_context) {
|
|
dev_warn(&device->dev,
|
|
"No client context found for %s\n",
|
|
client->name);
|
|
continue;
|
|
}
|
|
|
|
down_write(&lists_rwsem);
|
|
write_lock_irq(&device->client_data_lock);
|
|
list_del(&found_context->list);
|
|
write_unlock_irq(&device->client_data_lock);
|
|
up_write(&lists_rwsem);
|
|
kfree(found_context);
|
|
}
|
|
|
|
mutex_unlock(&device_mutex);
|
|
}
|
|
EXPORT_SYMBOL(ib_unregister_client);
|
|
|
|
/**
|
|
* ib_get_client_data - Get IB client context
|
|
* @device:Device to get context for
|
|
* @client:Client to get context for
|
|
*
|
|
* ib_get_client_data() returns client context set with
|
|
* ib_set_client_data().
|
|
*/
|
|
void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
|
|
{
|
|
struct ib_client_data *context;
|
|
void *ret = NULL;
|
|
unsigned long flags;
|
|
|
|
read_lock_irqsave(&device->client_data_lock, flags);
|
|
list_for_each_entry(context, &device->client_data_list, list)
|
|
if (context->client == client) {
|
|
ret = context->data;
|
|
break;
|
|
}
|
|
read_unlock_irqrestore(&device->client_data_lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_client_data);
|
|
|
|
/**
|
|
* ib_set_client_data - Set IB client context
|
|
* @device:Device to set context for
|
|
* @client:Client to set context for
|
|
* @data:Context to set
|
|
*
|
|
* ib_set_client_data() sets client context that can be retrieved with
|
|
* ib_get_client_data().
|
|
*/
|
|
void ib_set_client_data(struct ib_device *device, struct ib_client *client,
|
|
void *data)
|
|
{
|
|
struct ib_client_data *context;
|
|
unsigned long flags;
|
|
|
|
write_lock_irqsave(&device->client_data_lock, flags);
|
|
list_for_each_entry(context, &device->client_data_list, list)
|
|
if (context->client == client) {
|
|
context->data = data;
|
|
goto out;
|
|
}
|
|
|
|
dev_warn(&device->dev, "No client context found for %s\n",
|
|
client->name);
|
|
|
|
out:
|
|
write_unlock_irqrestore(&device->client_data_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_set_client_data);
|
|
|
|
/**
|
|
* ib_register_event_handler - Register an IB event handler
|
|
* @event_handler:Handler to register
|
|
*
|
|
* ib_register_event_handler() registers an event handler that will be
|
|
* called back when asynchronous IB events occur (as defined in
|
|
* chapter 11 of the InfiniBand Architecture Specification). This
|
|
* callback may occur in interrupt context.
|
|
*/
|
|
void ib_register_event_handler(struct ib_event_handler *event_handler)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
|
|
list_add_tail(&event_handler->list,
|
|
&event_handler->device->event_handler_list);
|
|
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_register_event_handler);
|
|
|
|
/**
|
|
* ib_unregister_event_handler - Unregister an event handler
|
|
* @event_handler:Handler to unregister
|
|
*
|
|
* Unregister an event handler registered with
|
|
* ib_register_event_handler().
|
|
*/
|
|
void ib_unregister_event_handler(struct ib_event_handler *event_handler)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
|
|
list_del(&event_handler->list);
|
|
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_unregister_event_handler);
|
|
|
|
/**
|
|
* ib_dispatch_event - Dispatch an asynchronous event
|
|
* @event:Event to dispatch
|
|
*
|
|
* Low-level drivers must call ib_dispatch_event() to dispatch the
|
|
* event to all registered event handlers when an asynchronous event
|
|
* occurs.
|
|
*/
|
|
void ib_dispatch_event(struct ib_event *event)
|
|
{
|
|
unsigned long flags;
|
|
struct ib_event_handler *handler;
|
|
|
|
spin_lock_irqsave(&event->device->event_handler_lock, flags);
|
|
|
|
list_for_each_entry(handler, &event->device->event_handler_list, list)
|
|
handler->handler(handler, event);
|
|
|
|
spin_unlock_irqrestore(&event->device->event_handler_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_dispatch_event);
|
|
|
|
/**
|
|
* ib_query_port - Query IB port attributes
|
|
* @device:Device to query
|
|
* @port_num:Port number to query
|
|
* @port_attr:Port attributes
|
|
*
|
|
* ib_query_port() returns the attributes of a port through the
|
|
* @port_attr pointer.
|
|
*/
|
|
int ib_query_port(struct ib_device *device,
|
|
u8 port_num,
|
|
struct ib_port_attr *port_attr)
|
|
{
|
|
union ib_gid gid;
|
|
int err;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
memset(port_attr, 0, sizeof(*port_attr));
|
|
err = device->query_port(device, port_num, port_attr);
|
|
if (err || port_attr->subnet_prefix)
|
|
return err;
|
|
|
|
if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND)
|
|
return 0;
|
|
|
|
err = device->query_gid(device, port_num, 0, &gid);
|
|
if (err)
|
|
return err;
|
|
|
|
port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_query_port);
|
|
|
|
/**
|
|
* ib_enum_roce_netdev - enumerate all RoCE ports
|
|
* @ib_dev : IB device we want to query
|
|
* @filter: Should we call the callback?
|
|
* @filter_cookie: Cookie passed to filter
|
|
* @cb: Callback to call for each found RoCE ports
|
|
* @cookie: Cookie passed back to the callback
|
|
*
|
|
* Enumerates all of the physical RoCE ports of ib_dev
|
|
* which are related to netdevice and calls callback() on each
|
|
* device for which filter() function returns non zero.
|
|
*/
|
|
void ib_enum_roce_netdev(struct ib_device *ib_dev,
|
|
roce_netdev_filter filter,
|
|
void *filter_cookie,
|
|
roce_netdev_callback cb,
|
|
void *cookie)
|
|
{
|
|
u8 port;
|
|
|
|
for (port = rdma_start_port(ib_dev); port <= rdma_end_port(ib_dev);
|
|
port++)
|
|
if (rdma_protocol_roce(ib_dev, port)) {
|
|
struct net_device *idev = NULL;
|
|
|
|
if (ib_dev->get_netdev)
|
|
idev = ib_dev->get_netdev(ib_dev, port);
|
|
|
|
if (idev &&
|
|
idev->reg_state >= NETREG_UNREGISTERED) {
|
|
dev_put(idev);
|
|
idev = NULL;
|
|
}
|
|
|
|
if (filter(ib_dev, port, idev, filter_cookie))
|
|
cb(ib_dev, port, idev, cookie);
|
|
|
|
if (idev)
|
|
dev_put(idev);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ib_enum_all_roce_netdevs - enumerate all RoCE devices
|
|
* @filter: Should we call the callback?
|
|
* @filter_cookie: Cookie passed to filter
|
|
* @cb: Callback to call for each found RoCE ports
|
|
* @cookie: Cookie passed back to the callback
|
|
*
|
|
* Enumerates all RoCE devices' physical ports which are related
|
|
* to netdevices and calls callback() on each device for which
|
|
* filter() function returns non zero.
|
|
*/
|
|
void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
|
|
void *filter_cookie,
|
|
roce_netdev_callback cb,
|
|
void *cookie)
|
|
{
|
|
struct ib_device *dev;
|
|
|
|
down_read(&lists_rwsem);
|
|
list_for_each_entry(dev, &device_list, core_list)
|
|
ib_enum_roce_netdev(dev, filter, filter_cookie, cb, cookie);
|
|
up_read(&lists_rwsem);
|
|
}
|
|
|
|
/**
|
|
* ib_enum_all_devs - enumerate all ib_devices
|
|
* @cb: Callback to call for each found ib_device
|
|
*
|
|
* Enumerates all ib_devices and calls callback() on each device.
|
|
*/
|
|
int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb,
|
|
struct netlink_callback *cb)
|
|
{
|
|
struct ib_device *dev;
|
|
unsigned int idx = 0;
|
|
int ret = 0;
|
|
|
|
down_read(&lists_rwsem);
|
|
list_for_each_entry(dev, &device_list, core_list) {
|
|
ret = nldev_cb(dev, skb, cb, idx);
|
|
if (ret)
|
|
break;
|
|
idx++;
|
|
}
|
|
|
|
up_read(&lists_rwsem);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ib_query_pkey - Get P_Key table entry
|
|
* @device:Device to query
|
|
* @port_num:Port number to query
|
|
* @index:P_Key table index to query
|
|
* @pkey:Returned P_Key
|
|
*
|
|
* ib_query_pkey() fetches the specified P_Key table entry.
|
|
*/
|
|
int ib_query_pkey(struct ib_device *device,
|
|
u8 port_num, u16 index, u16 *pkey)
|
|
{
|
|
return device->query_pkey(device, port_num, index, pkey);
|
|
}
|
|
EXPORT_SYMBOL(ib_query_pkey);
|
|
|
|
/**
|
|
* ib_modify_device - Change IB device attributes
|
|
* @device:Device to modify
|
|
* @device_modify_mask:Mask of attributes to change
|
|
* @device_modify:New attribute values
|
|
*
|
|
* ib_modify_device() changes a device's attributes as specified by
|
|
* the @device_modify_mask and @device_modify structure.
|
|
*/
|
|
int ib_modify_device(struct ib_device *device,
|
|
int device_modify_mask,
|
|
struct ib_device_modify *device_modify)
|
|
{
|
|
if (!device->modify_device)
|
|
return -ENOSYS;
|
|
|
|
return device->modify_device(device, device_modify_mask,
|
|
device_modify);
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_device);
|
|
|
|
/**
|
|
* ib_modify_port - Modifies the attributes for the specified port.
|
|
* @device: The device to modify.
|
|
* @port_num: The number of the port to modify.
|
|
* @port_modify_mask: Mask used to specify which attributes of the port
|
|
* to change.
|
|
* @port_modify: New attribute values for the port.
|
|
*
|
|
* ib_modify_port() changes a port's attributes as specified by the
|
|
* @port_modify_mask and @port_modify structure.
|
|
*/
|
|
int ib_modify_port(struct ib_device *device,
|
|
u8 port_num, int port_modify_mask,
|
|
struct ib_port_modify *port_modify)
|
|
{
|
|
int rc;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
if (device->modify_port)
|
|
rc = device->modify_port(device, port_num, port_modify_mask,
|
|
port_modify);
|
|
else
|
|
rc = rdma_protocol_roce(device, port_num) ? 0 : -ENOSYS;
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_port);
|
|
|
|
/**
|
|
* ib_find_gid - Returns the port number and GID table index where
|
|
* a specified GID value occurs. Its searches only for IB link layer.
|
|
* @device: The device to query.
|
|
* @gid: The GID value to search for.
|
|
* @port_num: The port number of the device where the GID value was found.
|
|
* @index: The index into the GID table where the GID was found. This
|
|
* parameter may be NULL.
|
|
*/
|
|
int ib_find_gid(struct ib_device *device, union ib_gid *gid,
|
|
u8 *port_num, u16 *index)
|
|
{
|
|
union ib_gid tmp_gid;
|
|
int ret, port, i;
|
|
|
|
for (port = rdma_start_port(device); port <= rdma_end_port(device); ++port) {
|
|
if (!rdma_protocol_ib(device, port))
|
|
continue;
|
|
|
|
for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) {
|
|
ret = rdma_query_gid(device, port, i, &tmp_gid);
|
|
if (ret)
|
|
return ret;
|
|
if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
|
|
*port_num = port;
|
|
if (index)
|
|
*index = i;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_gid);
|
|
|
|
/**
|
|
* ib_find_pkey - Returns the PKey table index where a specified
|
|
* PKey value occurs.
|
|
* @device: The device to query.
|
|
* @port_num: The port number of the device to search for the PKey.
|
|
* @pkey: The PKey value to search for.
|
|
* @index: The index into the PKey table where the PKey was found.
|
|
*/
|
|
int ib_find_pkey(struct ib_device *device,
|
|
u8 port_num, u16 pkey, u16 *index)
|
|
{
|
|
int ret, i;
|
|
u16 tmp_pkey;
|
|
int partial_ix = -1;
|
|
|
|
for (i = 0; i < device->port_immutable[port_num].pkey_tbl_len; ++i) {
|
|
ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
|
|
if (ret)
|
|
return ret;
|
|
if ((pkey & 0x7fff) == (tmp_pkey & 0x7fff)) {
|
|
/* if there is full-member pkey take it.*/
|
|
if (tmp_pkey & 0x8000) {
|
|
*index = i;
|
|
return 0;
|
|
}
|
|
if (partial_ix < 0)
|
|
partial_ix = i;
|
|
}
|
|
}
|
|
|
|
/*no full-member, if exists take the limited*/
|
|
if (partial_ix >= 0) {
|
|
*index = partial_ix;
|
|
return 0;
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_pkey);
|
|
|
|
/**
|
|
* ib_get_net_dev_by_params() - Return the appropriate net_dev
|
|
* for a received CM request
|
|
* @dev: An RDMA device on which the request has been received.
|
|
* @port: Port number on the RDMA device.
|
|
* @pkey: The Pkey the request came on.
|
|
* @gid: A GID that the net_dev uses to communicate.
|
|
* @addr: Contains the IP address that the request specified as its
|
|
* destination.
|
|
*/
|
|
struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
|
|
u8 port,
|
|
u16 pkey,
|
|
const union ib_gid *gid,
|
|
const struct sockaddr *addr)
|
|
{
|
|
struct net_device *net_dev = NULL;
|
|
struct ib_client_data *context;
|
|
|
|
if (!rdma_protocol_ib(dev, port))
|
|
return NULL;
|
|
|
|
down_read(&lists_rwsem);
|
|
|
|
list_for_each_entry(context, &dev->client_data_list, list) {
|
|
struct ib_client *client = context->client;
|
|
|
|
if (context->going_down)
|
|
continue;
|
|
|
|
if (client->get_net_dev_by_params) {
|
|
net_dev = client->get_net_dev_by_params(dev, port, pkey,
|
|
gid, addr,
|
|
context->data);
|
|
if (net_dev)
|
|
break;
|
|
}
|
|
}
|
|
|
|
up_read(&lists_rwsem);
|
|
|
|
return net_dev;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_net_dev_by_params);
|
|
|
|
static const struct rdma_nl_cbs ibnl_ls_cb_table[RDMA_NL_LS_NUM_OPS] = {
|
|
[RDMA_NL_LS_OP_RESOLVE] = {
|
|
.doit = ib_nl_handle_resolve_resp,
|
|
.flags = RDMA_NL_ADMIN_PERM,
|
|
},
|
|
[RDMA_NL_LS_OP_SET_TIMEOUT] = {
|
|
.doit = ib_nl_handle_set_timeout,
|
|
.flags = RDMA_NL_ADMIN_PERM,
|
|
},
|
|
[RDMA_NL_LS_OP_IP_RESOLVE] = {
|
|
.doit = ib_nl_handle_ip_res_resp,
|
|
.flags = RDMA_NL_ADMIN_PERM,
|
|
},
|
|
};
|
|
|
|
static int __init ib_core_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ib_wq = alloc_workqueue("infiniband", 0, 0);
|
|
if (!ib_wq)
|
|
return -ENOMEM;
|
|
|
|
ib_comp_wq = alloc_workqueue("ib-comp-wq",
|
|
WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_SYSFS, 0);
|
|
if (!ib_comp_wq) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
ib_comp_unbound_wq =
|
|
alloc_workqueue("ib-comp-unb-wq",
|
|
WQ_UNBOUND | WQ_HIGHPRI | WQ_MEM_RECLAIM |
|
|
WQ_SYSFS, WQ_UNBOUND_MAX_ACTIVE);
|
|
if (!ib_comp_unbound_wq) {
|
|
ret = -ENOMEM;
|
|
goto err_comp;
|
|
}
|
|
|
|
ret = class_register(&ib_class);
|
|
if (ret) {
|
|
pr_warn("Couldn't create InfiniBand device class\n");
|
|
goto err_comp_unbound;
|
|
}
|
|
|
|
ret = rdma_nl_init();
|
|
if (ret) {
|
|
pr_warn("Couldn't init IB netlink interface: err %d\n", ret);
|
|
goto err_sysfs;
|
|
}
|
|
|
|
ret = addr_init();
|
|
if (ret) {
|
|
pr_warn("Could't init IB address resolution\n");
|
|
goto err_ibnl;
|
|
}
|
|
|
|
ret = ib_mad_init();
|
|
if (ret) {
|
|
pr_warn("Couldn't init IB MAD\n");
|
|
goto err_addr;
|
|
}
|
|
|
|
ret = ib_sa_init();
|
|
if (ret) {
|
|
pr_warn("Couldn't init SA\n");
|
|
goto err_mad;
|
|
}
|
|
|
|
ret = register_lsm_notifier(&ibdev_lsm_nb);
|
|
if (ret) {
|
|
pr_warn("Couldn't register LSM notifier. ret %d\n", ret);
|
|
goto err_sa;
|
|
}
|
|
|
|
nldev_init();
|
|
rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table);
|
|
roce_gid_mgmt_init();
|
|
|
|
return 0;
|
|
|
|
err_sa:
|
|
ib_sa_cleanup();
|
|
err_mad:
|
|
ib_mad_cleanup();
|
|
err_addr:
|
|
addr_cleanup();
|
|
err_ibnl:
|
|
rdma_nl_exit();
|
|
err_sysfs:
|
|
class_unregister(&ib_class);
|
|
err_comp_unbound:
|
|
destroy_workqueue(ib_comp_unbound_wq);
|
|
err_comp:
|
|
destroy_workqueue(ib_comp_wq);
|
|
err:
|
|
destroy_workqueue(ib_wq);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ib_core_cleanup(void)
|
|
{
|
|
roce_gid_mgmt_cleanup();
|
|
nldev_exit();
|
|
rdma_nl_unregister(RDMA_NL_LS);
|
|
unregister_lsm_notifier(&ibdev_lsm_nb);
|
|
ib_sa_cleanup();
|
|
ib_mad_cleanup();
|
|
addr_cleanup();
|
|
rdma_nl_exit();
|
|
class_unregister(&ib_class);
|
|
destroy_workqueue(ib_comp_unbound_wq);
|
|
destroy_workqueue(ib_comp_wq);
|
|
/* Make sure that any pending umem accounting work is done. */
|
|
destroy_workqueue(ib_wq);
|
|
}
|
|
|
|
MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_LS, 4);
|
|
|
|
subsys_initcall(ib_core_init);
|
|
module_exit(ib_core_cleanup);
|