936 lines
23 KiB
C
936 lines
23 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. 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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* $Id: user_mad.c 2814 2005-07-06 19:14:09Z halr $
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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/cdev.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/poll.h>
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#include <linux/rwsem.h>
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#include <linux/kref.h>
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#include <asm/uaccess.h>
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#include <asm/semaphore.h>
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#include <ib_mad.h>
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#include <ib_user_mad.h>
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("InfiniBand userspace MAD packet access");
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MODULE_LICENSE("Dual BSD/GPL");
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enum {
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IB_UMAD_MAX_PORTS = 64,
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IB_UMAD_MAX_AGENTS = 32,
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IB_UMAD_MAJOR = 231,
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IB_UMAD_MINOR_BASE = 0
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};
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struct ib_umad_port {
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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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int sm_devnum;
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struct cdev sm_dev;
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struct class_device sm_class_dev;
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struct semaphore sm_sem;
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struct ib_device *ib_dev;
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struct ib_umad_device *umad_dev;
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u8 port_num;
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};
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struct ib_umad_device {
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int start_port, end_port;
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struct kref ref;
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struct ib_umad_port port[0];
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};
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struct ib_umad_file {
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struct ib_umad_port *port;
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spinlock_t recv_lock;
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struct list_head recv_list;
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wait_queue_head_t recv_wait;
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struct rw_semaphore agent_mutex;
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struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS];
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struct ib_mr *mr[IB_UMAD_MAX_AGENTS];
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};
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struct ib_umad_packet {
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struct ib_ah *ah;
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struct ib_mad_send_buf *msg;
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struct list_head list;
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int length;
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DECLARE_PCI_UNMAP_ADDR(mapping)
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struct ib_user_mad mad;
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};
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static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE);
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static spinlock_t map_lock;
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static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS * 2);
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static void ib_umad_add_one(struct ib_device *device);
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static void ib_umad_remove_one(struct ib_device *device);
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static int queue_packet(struct ib_umad_file *file,
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struct ib_mad_agent *agent,
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struct ib_umad_packet *packet)
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{
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int ret = 1;
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down_read(&file->agent_mutex);
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for (packet->mad.hdr.id = 0;
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packet->mad.hdr.id < IB_UMAD_MAX_AGENTS;
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packet->mad.hdr.id++)
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if (agent == file->agent[packet->mad.hdr.id]) {
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spin_lock_irq(&file->recv_lock);
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list_add_tail(&packet->list, &file->recv_list);
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spin_unlock_irq(&file->recv_lock);
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wake_up_interruptible(&file->recv_wait);
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ret = 0;
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break;
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}
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up_read(&file->agent_mutex);
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return ret;
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}
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static void send_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *send_wc)
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{
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struct ib_umad_file *file = agent->context;
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struct ib_umad_packet *timeout, *packet =
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(void *) (unsigned long) send_wc->wr_id;
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ib_destroy_ah(packet->msg->send_wr.wr.ud.ah);
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ib_free_send_mad(packet->msg);
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if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) {
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timeout = kmalloc(sizeof *timeout + sizeof (struct ib_mad_hdr),
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GFP_KERNEL);
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if (!timeout)
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goto out;
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memset(timeout, 0, sizeof *timeout + sizeof (struct ib_mad_hdr));
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timeout->length = sizeof (struct ib_mad_hdr);
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timeout->mad.hdr.id = packet->mad.hdr.id;
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timeout->mad.hdr.status = ETIMEDOUT;
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memcpy(timeout->mad.data, packet->mad.data,
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sizeof (struct ib_mad_hdr));
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if (!queue_packet(file, agent, timeout))
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return;
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}
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out:
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kfree(packet);
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}
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static void recv_handler(struct ib_mad_agent *agent,
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struct ib_mad_recv_wc *mad_recv_wc)
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{
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struct ib_umad_file *file = agent->context;
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struct ib_umad_packet *packet;
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int length;
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if (mad_recv_wc->wc->status != IB_WC_SUCCESS)
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goto out;
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length = mad_recv_wc->mad_len;
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packet = kmalloc(sizeof *packet + length, GFP_KERNEL);
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if (!packet)
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goto out;
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memset(packet, 0, sizeof *packet + length);
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packet->length = length;
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ib_coalesce_recv_mad(mad_recv_wc, packet->mad.data);
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packet->mad.hdr.status = 0;
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packet->mad.hdr.length = length + sizeof (struct ib_user_mad);
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packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
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packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid);
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packet->mad.hdr.sl = mad_recv_wc->wc->sl;
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packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits;
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packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
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if (packet->mad.hdr.grh_present) {
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/* XXX parse GRH */
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packet->mad.hdr.gid_index = 0;
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packet->mad.hdr.hop_limit = 0;
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packet->mad.hdr.traffic_class = 0;
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memset(packet->mad.hdr.gid, 0, 16);
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packet->mad.hdr.flow_label = 0;
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}
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if (queue_packet(file, agent, packet))
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kfree(packet);
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out:
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ib_free_recv_mad(mad_recv_wc);
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}
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static ssize_t ib_umad_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_umad_file *file = filp->private_data;
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struct ib_umad_packet *packet;
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ssize_t ret;
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if (count < sizeof (struct ib_user_mad) + sizeof (struct ib_mad))
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return -EINVAL;
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spin_lock_irq(&file->recv_lock);
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while (list_empty(&file->recv_list)) {
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spin_unlock_irq(&file->recv_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->recv_wait,
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!list_empty(&file->recv_list)))
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return -ERESTARTSYS;
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spin_lock_irq(&file->recv_lock);
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}
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packet = list_entry(file->recv_list.next, struct ib_umad_packet, list);
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list_del(&packet->list);
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spin_unlock_irq(&file->recv_lock);
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if (count < packet->length + sizeof (struct ib_user_mad)) {
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/* Return length needed (and first RMPP segment) if too small */
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if (copy_to_user(buf, &packet->mad,
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sizeof (struct ib_user_mad) + sizeof (struct ib_mad)))
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ret = -EFAULT;
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else
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ret = -ENOSPC;
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} else if (copy_to_user(buf, &packet->mad,
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packet->length + sizeof (struct ib_user_mad)))
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ret = -EFAULT;
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else
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ret = packet->length + sizeof (struct ib_user_mad);
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if (ret < 0) {
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/* Requeue packet */
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spin_lock_irq(&file->recv_lock);
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list_add(&packet->list, &file->recv_list);
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spin_unlock_irq(&file->recv_lock);
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} else
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kfree(packet);
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return ret;
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}
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static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
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size_t count, loff_t *pos)
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{
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struct ib_umad_file *file = filp->private_data;
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struct ib_umad_packet *packet;
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struct ib_mad_agent *agent;
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struct ib_ah_attr ah_attr;
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struct ib_send_wr *bad_wr;
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struct ib_rmpp_mad *rmpp_mad;
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u8 method;
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u64 *tid;
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int ret, length, hdr_len, data_len, rmpp_hdr_size;
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int rmpp_active = 0;
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if (count < sizeof (struct ib_user_mad))
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return -EINVAL;
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length = count - sizeof (struct ib_user_mad);
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packet = kmalloc(sizeof *packet + sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr), GFP_KERNEL);
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if (!packet)
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return -ENOMEM;
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if (copy_from_user(&packet->mad, buf,
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sizeof (struct ib_user_mad) +
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sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr))) {
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ret = -EFAULT;
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goto err;
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}
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if (packet->mad.hdr.id < 0 ||
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packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) {
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ret = -EINVAL;
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goto err;
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}
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packet->length = length;
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down_read(&file->agent_mutex);
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agent = file->agent[packet->mad.hdr.id];
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if (!agent) {
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ret = -EINVAL;
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goto err_up;
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}
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid);
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ah_attr.sl = packet->mad.hdr.sl;
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ah_attr.src_path_bits = packet->mad.hdr.path_bits;
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ah_attr.port_num = file->port->port_num;
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if (packet->mad.hdr.grh_present) {
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ah_attr.ah_flags = IB_AH_GRH;
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memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16);
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ah_attr.grh.flow_label = packet->mad.hdr.flow_label;
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ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit;
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ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class;
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}
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packet->ah = ib_create_ah(agent->qp->pd, &ah_attr);
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if (IS_ERR(packet->ah)) {
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ret = PTR_ERR(packet->ah);
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goto err_up;
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}
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rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data;
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if (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE) {
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/* RMPP active */
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if (!agent->rmpp_version) {
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ret = -EINVAL;
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goto err_ah;
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}
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/* Validate that management class can support RMPP */
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if (rmpp_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_ADM) {
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hdr_len = offsetof(struct ib_sa_mad, data);
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data_len = length;
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} else if ((rmpp_mad->mad_hdr.mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
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(rmpp_mad->mad_hdr.mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) {
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hdr_len = offsetof(struct ib_vendor_mad, data);
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data_len = length - hdr_len;
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} else {
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ret = -EINVAL;
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goto err_ah;
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}
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rmpp_active = 1;
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} else {
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if (length > sizeof(struct ib_mad)) {
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ret = -EINVAL;
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goto err_ah;
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}
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hdr_len = offsetof(struct ib_mad, data);
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data_len = length - hdr_len;
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}
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packet->msg = ib_create_send_mad(agent,
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be32_to_cpu(packet->mad.hdr.qpn),
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0, packet->ah, rmpp_active,
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hdr_len, data_len,
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GFP_KERNEL);
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if (IS_ERR(packet->msg)) {
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ret = PTR_ERR(packet->msg);
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goto err_ah;
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}
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packet->msg->send_wr.wr.ud.timeout_ms = packet->mad.hdr.timeout_ms;
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packet->msg->send_wr.wr.ud.retries = packet->mad.hdr.retries;
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/* Override send WR WRID initialized in ib_create_send_mad */
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packet->msg->send_wr.wr_id = (unsigned long) packet;
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|
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if (!rmpp_active) {
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/* Copy message from user into send buffer */
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if (copy_from_user(packet->msg->mad,
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buf + sizeof(struct ib_user_mad), length)) {
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ret = -EFAULT;
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goto err_msg;
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}
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} else {
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rmpp_hdr_size = sizeof(struct ib_mad_hdr) +
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sizeof(struct ib_rmpp_hdr);
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|
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/* Only copy MAD headers (RMPP header in place) */
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memcpy(packet->msg->mad, packet->mad.data,
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sizeof(struct ib_mad_hdr));
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|
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/* Now, copy rest of message from user into send buffer */
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if (copy_from_user(((struct ib_rmpp_mad *) packet->msg->mad)->data,
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buf + sizeof (struct ib_user_mad) + rmpp_hdr_size,
|
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length - rmpp_hdr_size)) {
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ret = -EFAULT;
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goto err_msg;
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}
|
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}
|
|
|
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/*
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* If userspace is generating a request that will generate a
|
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* response, we need to make sure the high-order part of the
|
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* transaction ID matches the agent being used to send the
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* MAD.
|
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*/
|
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method = packet->msg->mad->mad_hdr.method;
|
|
|
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if (!(method & IB_MGMT_METHOD_RESP) &&
|
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method != IB_MGMT_METHOD_TRAP_REPRESS &&
|
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method != IB_MGMT_METHOD_SEND) {
|
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tid = &packet->msg->mad->mad_hdr.tid;
|
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*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
|
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(be64_to_cpup(tid) & 0xffffffff));
|
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}
|
|
|
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ret = ib_post_send_mad(agent, &packet->msg->send_wr, &bad_wr);
|
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if (ret)
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goto err_msg;
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|
|
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up_read(&file->agent_mutex);
|
|
|
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return sizeof (struct ib_user_mad_hdr) + packet->length;
|
|
|
|
err_msg:
|
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ib_free_send_mad(packet->msg);
|
|
|
|
err_ah:
|
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ib_destroy_ah(packet->ah);
|
|
|
|
err_up:
|
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up_read(&file->agent_mutex);
|
|
|
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err:
|
|
kfree(packet);
|
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return ret;
|
|
}
|
|
|
|
static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait)
|
|
{
|
|
struct ib_umad_file *file = filp->private_data;
|
|
|
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/* we will always be able to post a MAD send */
|
|
unsigned int mask = POLLOUT | POLLWRNORM;
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|
|
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poll_wait(filp, &file->recv_wait, wait);
|
|
|
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if (!list_empty(&file->recv_list))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int ib_umad_reg_agent(struct ib_umad_file *file, unsigned long arg)
|
|
{
|
|
struct ib_user_mad_reg_req ureq;
|
|
struct ib_mad_reg_req req;
|
|
struct ib_mad_agent *agent;
|
|
int agent_id;
|
|
int ret;
|
|
|
|
down_write(&file->agent_mutex);
|
|
|
|
if (copy_from_user(&ureq, (void __user *) arg, sizeof ureq)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (ureq.qpn != 0 && ureq.qpn != 1) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
|
|
if (!file->agent[agent_id])
|
|
goto found;
|
|
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
|
|
found:
|
|
if (ureq.mgmt_class) {
|
|
req.mgmt_class = ureq.mgmt_class;
|
|
req.mgmt_class_version = ureq.mgmt_class_version;
|
|
memcpy(req.method_mask, ureq.method_mask, sizeof req.method_mask);
|
|
memcpy(req.oui, ureq.oui, sizeof req.oui);
|
|
}
|
|
|
|
agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
|
|
ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
|
|
ureq.mgmt_class ? &req : NULL,
|
|
ureq.rmpp_version,
|
|
send_handler, recv_handler, file);
|
|
if (IS_ERR(agent)) {
|
|
ret = PTR_ERR(agent);
|
|
goto out;
|
|
}
|
|
|
|
file->agent[agent_id] = agent;
|
|
|
|
file->mr[agent_id] = ib_get_dma_mr(agent->qp->pd, IB_ACCESS_LOCAL_WRITE);
|
|
if (IS_ERR(file->mr[agent_id])) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
if (put_user(agent_id,
|
|
(u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {
|
|
ret = -EFAULT;
|
|
goto err_mr;
|
|
}
|
|
|
|
ret = 0;
|
|
goto out;
|
|
|
|
err_mr:
|
|
ib_dereg_mr(file->mr[agent_id]);
|
|
|
|
err:
|
|
file->agent[agent_id] = NULL;
|
|
ib_unregister_mad_agent(agent);
|
|
|
|
out:
|
|
up_write(&file->agent_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg)
|
|
{
|
|
u32 id;
|
|
int ret = 0;
|
|
|
|
down_write(&file->agent_mutex);
|
|
|
|
if (get_user(id, (u32 __user *) arg)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (id < 0 || id >= IB_UMAD_MAX_AGENTS || !file->agent[id]) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ib_dereg_mr(file->mr[id]);
|
|
ib_unregister_mad_agent(file->agent[id]);
|
|
file->agent[id] = NULL;
|
|
|
|
out:
|
|
up_write(&file->agent_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static long ib_umad_ioctl(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case IB_USER_MAD_REGISTER_AGENT:
|
|
return ib_umad_reg_agent(filp->private_data, arg);
|
|
case IB_USER_MAD_UNREGISTER_AGENT:
|
|
return ib_umad_unreg_agent(filp->private_data, arg);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static int ib_umad_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_umad_port *port =
|
|
container_of(inode->i_cdev, struct ib_umad_port, dev);
|
|
struct ib_umad_file *file;
|
|
|
|
file = kmalloc(sizeof *file, GFP_KERNEL);
|
|
if (!file)
|
|
return -ENOMEM;
|
|
|
|
memset(file, 0, sizeof *file);
|
|
|
|
spin_lock_init(&file->recv_lock);
|
|
init_rwsem(&file->agent_mutex);
|
|
INIT_LIST_HEAD(&file->recv_list);
|
|
init_waitqueue_head(&file->recv_wait);
|
|
|
|
file->port = port;
|
|
filp->private_data = file;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ib_umad_close(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_umad_file *file = filp->private_data;
|
|
struct ib_umad_packet *packet, *tmp;
|
|
int i;
|
|
|
|
for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i)
|
|
if (file->agent[i]) {
|
|
ib_dereg_mr(file->mr[i]);
|
|
ib_unregister_mad_agent(file->agent[i]);
|
|
}
|
|
|
|
list_for_each_entry_safe(packet, tmp, &file->recv_list, list)
|
|
kfree(packet);
|
|
|
|
kfree(file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations umad_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = ib_umad_read,
|
|
.write = ib_umad_write,
|
|
.poll = ib_umad_poll,
|
|
.unlocked_ioctl = ib_umad_ioctl,
|
|
.compat_ioctl = ib_umad_ioctl,
|
|
.open = ib_umad_open,
|
|
.release = ib_umad_close
|
|
};
|
|
|
|
static int ib_umad_sm_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_umad_port *port =
|
|
container_of(inode->i_cdev, struct ib_umad_port, sm_dev);
|
|
struct ib_port_modify props = {
|
|
.set_port_cap_mask = IB_PORT_SM
|
|
};
|
|
int ret;
|
|
|
|
if (filp->f_flags & O_NONBLOCK) {
|
|
if (down_trylock(&port->sm_sem))
|
|
return -EAGAIN;
|
|
} else {
|
|
if (down_interruptible(&port->sm_sem))
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
|
|
if (ret) {
|
|
up(&port->sm_sem);
|
|
return ret;
|
|
}
|
|
|
|
filp->private_data = port;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ib_umad_sm_close(struct inode *inode, struct file *filp)
|
|
{
|
|
struct ib_umad_port *port = filp->private_data;
|
|
struct ib_port_modify props = {
|
|
.clr_port_cap_mask = IB_PORT_SM
|
|
};
|
|
int ret;
|
|
|
|
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
|
|
up(&port->sm_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct file_operations umad_sm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ib_umad_sm_open,
|
|
.release = ib_umad_sm_close
|
|
};
|
|
|
|
static struct ib_client umad_client = {
|
|
.name = "umad",
|
|
.add = ib_umad_add_one,
|
|
.remove = ib_umad_remove_one
|
|
};
|
|
|
|
static ssize_t show_dev(struct class_device *class_dev, char *buf)
|
|
{
|
|
struct ib_umad_port *port = class_get_devdata(class_dev);
|
|
|
|
if (class_dev == &port->class_dev)
|
|
return print_dev_t(buf, port->dev.dev);
|
|
else
|
|
return print_dev_t(buf, port->sm_dev.dev);
|
|
}
|
|
static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
|
|
|
|
static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
|
|
{
|
|
struct ib_umad_port *port = class_get_devdata(class_dev);
|
|
|
|
return sprintf(buf, "%s\n", port->ib_dev->name);
|
|
}
|
|
static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
|
|
|
|
static ssize_t show_port(struct class_device *class_dev, char *buf)
|
|
{
|
|
struct ib_umad_port *port = class_get_devdata(class_dev);
|
|
|
|
return sprintf(buf, "%d\n", port->port_num);
|
|
}
|
|
static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL);
|
|
|
|
static void ib_umad_release_dev(struct kref *ref)
|
|
{
|
|
struct ib_umad_device *dev =
|
|
container_of(ref, struct ib_umad_device, ref);
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
static void ib_umad_release_port(struct class_device *class_dev)
|
|
{
|
|
struct ib_umad_port *port = class_get_devdata(class_dev);
|
|
|
|
if (class_dev == &port->class_dev) {
|
|
cdev_del(&port->dev);
|
|
clear_bit(port->devnum, dev_map);
|
|
} else {
|
|
cdev_del(&port->sm_dev);
|
|
clear_bit(port->sm_devnum, dev_map);
|
|
}
|
|
|
|
kref_put(&port->umad_dev->ref, ib_umad_release_dev);
|
|
}
|
|
|
|
static struct class umad_class = {
|
|
.name = "infiniband_mad",
|
|
.release = ib_umad_release_port
|
|
};
|
|
|
|
static ssize_t show_abi_version(struct class *class, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", IB_USER_MAD_ABI_VERSION);
|
|
}
|
|
static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
|
|
|
|
static int ib_umad_init_port(struct ib_device *device, int port_num,
|
|
struct ib_umad_port *port)
|
|
{
|
|
spin_lock(&map_lock);
|
|
port->devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
|
|
if (port->devnum >= IB_UMAD_MAX_PORTS) {
|
|
spin_unlock(&map_lock);
|
|
return -1;
|
|
}
|
|
port->sm_devnum = find_next_zero_bit(dev_map, IB_UMAD_MAX_PORTS * 2, IB_UMAD_MAX_PORTS);
|
|
if (port->sm_devnum >= IB_UMAD_MAX_PORTS * 2) {
|
|
spin_unlock(&map_lock);
|
|
return -1;
|
|
}
|
|
set_bit(port->devnum, dev_map);
|
|
set_bit(port->sm_devnum, dev_map);
|
|
spin_unlock(&map_lock);
|
|
|
|
port->ib_dev = device;
|
|
port->port_num = port_num;
|
|
init_MUTEX(&port->sm_sem);
|
|
|
|
cdev_init(&port->dev, &umad_fops);
|
|
port->dev.owner = THIS_MODULE;
|
|
kobject_set_name(&port->dev.kobj, "umad%d", port->devnum);
|
|
if (cdev_add(&port->dev, base_dev + port->devnum, 1))
|
|
return -1;
|
|
|
|
port->class_dev.class = &umad_class;
|
|
port->class_dev.dev = device->dma_device;
|
|
|
|
snprintf(port->class_dev.class_id, BUS_ID_SIZE, "umad%d", port->devnum);
|
|
|
|
if (class_device_register(&port->class_dev))
|
|
goto err_cdev;
|
|
|
|
class_set_devdata(&port->class_dev, port);
|
|
kref_get(&port->umad_dev->ref);
|
|
|
|
if (class_device_create_file(&port->class_dev, &class_device_attr_dev))
|
|
goto err_class;
|
|
if (class_device_create_file(&port->class_dev, &class_device_attr_ibdev))
|
|
goto err_class;
|
|
if (class_device_create_file(&port->class_dev, &class_device_attr_port))
|
|
goto err_class;
|
|
|
|
cdev_init(&port->sm_dev, &umad_sm_fops);
|
|
port->sm_dev.owner = THIS_MODULE;
|
|
kobject_set_name(&port->dev.kobj, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS);
|
|
if (cdev_add(&port->sm_dev, base_dev + port->sm_devnum, 1))
|
|
return -1;
|
|
|
|
port->sm_class_dev.class = &umad_class;
|
|
port->sm_class_dev.dev = device->dma_device;
|
|
|
|
snprintf(port->sm_class_dev.class_id, BUS_ID_SIZE, "issm%d", port->sm_devnum - IB_UMAD_MAX_PORTS);
|
|
|
|
if (class_device_register(&port->sm_class_dev))
|
|
goto err_sm_cdev;
|
|
|
|
class_set_devdata(&port->sm_class_dev, port);
|
|
kref_get(&port->umad_dev->ref);
|
|
|
|
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_dev))
|
|
goto err_sm_class;
|
|
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_ibdev))
|
|
goto err_sm_class;
|
|
if (class_device_create_file(&port->sm_class_dev, &class_device_attr_port))
|
|
goto err_sm_class;
|
|
|
|
return 0;
|
|
|
|
err_sm_class:
|
|
class_device_unregister(&port->sm_class_dev);
|
|
|
|
err_sm_cdev:
|
|
cdev_del(&port->sm_dev);
|
|
|
|
err_class:
|
|
class_device_unregister(&port->class_dev);
|
|
|
|
err_cdev:
|
|
cdev_del(&port->dev);
|
|
clear_bit(port->devnum, dev_map);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void ib_umad_add_one(struct ib_device *device)
|
|
{
|
|
struct ib_umad_device *umad_dev;
|
|
int s, e, i;
|
|
|
|
if (device->node_type == IB_NODE_SWITCH)
|
|
s = e = 0;
|
|
else {
|
|
s = 1;
|
|
e = device->phys_port_cnt;
|
|
}
|
|
|
|
umad_dev = kmalloc(sizeof *umad_dev +
|
|
(e - s + 1) * sizeof (struct ib_umad_port),
|
|
GFP_KERNEL);
|
|
if (!umad_dev)
|
|
return;
|
|
|
|
memset(umad_dev, 0, sizeof *umad_dev +
|
|
(e - s + 1) * sizeof (struct ib_umad_port));
|
|
|
|
kref_init(&umad_dev->ref);
|
|
|
|
umad_dev->start_port = s;
|
|
umad_dev->end_port = e;
|
|
|
|
for (i = s; i <= e; ++i) {
|
|
umad_dev->port[i - s].umad_dev = umad_dev;
|
|
|
|
if (ib_umad_init_port(device, i, &umad_dev->port[i - s]))
|
|
goto err;
|
|
}
|
|
|
|
ib_set_client_data(device, &umad_client, umad_dev);
|
|
|
|
return;
|
|
|
|
err:
|
|
while (--i >= s) {
|
|
class_device_unregister(&umad_dev->port[i - s].class_dev);
|
|
class_device_unregister(&umad_dev->port[i - s].sm_class_dev);
|
|
}
|
|
|
|
kref_put(&umad_dev->ref, ib_umad_release_dev);
|
|
}
|
|
|
|
static void ib_umad_remove_one(struct ib_device *device)
|
|
{
|
|
struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client);
|
|
int i;
|
|
|
|
if (!umad_dev)
|
|
return;
|
|
|
|
for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) {
|
|
class_device_unregister(&umad_dev->port[i].class_dev);
|
|
class_device_unregister(&umad_dev->port[i].sm_class_dev);
|
|
}
|
|
|
|
kref_put(&umad_dev->ref, ib_umad_release_dev);
|
|
}
|
|
|
|
static int __init ib_umad_init(void)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock_init(&map_lock);
|
|
|
|
ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2,
|
|
"infiniband_mad");
|
|
if (ret) {
|
|
printk(KERN_ERR "user_mad: couldn't register device number\n");
|
|
goto out;
|
|
}
|
|
|
|
ret = class_register(&umad_class);
|
|
if (ret) {
|
|
printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n");
|
|
goto out_chrdev;
|
|
}
|
|
|
|
ret = class_create_file(&umad_class, &class_attr_abi_version);
|
|
if (ret) {
|
|
printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n");
|
|
goto out_class;
|
|
}
|
|
|
|
ret = ib_register_client(&umad_client);
|
|
if (ret) {
|
|
printk(KERN_ERR "user_mad: couldn't register ib_umad client\n");
|
|
goto out_class;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_class:
|
|
class_unregister(&umad_class);
|
|
|
|
out_chrdev:
|
|
unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ib_umad_cleanup(void)
|
|
{
|
|
ib_unregister_client(&umad_client);
|
|
class_unregister(&umad_class);
|
|
unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2);
|
|
}
|
|
|
|
module_init(ib_umad_init);
|
|
module_exit(ib_umad_cleanup);
|