| /* |
| * Copyright (c) 2004 Topspin Communications. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * $Id: user_mad.c 1389 2004-12-27 22:56:47Z roland $ |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/fs.h> |
| #include <linux/cdev.h> |
| #include <linux/pci.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/poll.h> |
| #include <linux/rwsem.h> |
| #include <linux/kref.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/semaphore.h> |
| |
| #include <ib_mad.h> |
| #include <ib_user_mad.h> |
| |
| MODULE_AUTHOR("Roland Dreier"); |
| MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| enum { |
| IB_UMAD_MAX_PORTS = 64, |
| IB_UMAD_MAX_AGENTS = 32, |
| |
| IB_UMAD_MAJOR = 231, |
| IB_UMAD_MINOR_BASE = 0 |
| }; |
| |
| struct ib_umad_port { |
| int devnum; |
| struct cdev dev; |
| struct class_device class_dev; |
| |
| int sm_devnum; |
| struct cdev sm_dev; |
| struct class_device sm_class_dev; |
| struct semaphore sm_sem; |
| |
| struct ib_device *ib_dev; |
| struct ib_umad_device *umad_dev; |
| u8 port_num; |
| }; |
| |
| struct ib_umad_device { |
| int start_port, end_port; |
| struct kref ref; |
| struct ib_umad_port port[0]; |
| }; |
| |
| struct ib_umad_file { |
| struct ib_umad_port *port; |
| spinlock_t recv_lock; |
| struct list_head recv_list; |
| wait_queue_head_t recv_wait; |
| struct rw_semaphore agent_mutex; |
| struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; |
| struct ib_mr *mr[IB_UMAD_MAX_AGENTS]; |
| }; |
| |
| struct ib_umad_packet { |
| struct ib_user_mad mad; |
| struct ib_ah *ah; |
| struct list_head list; |
| DECLARE_PCI_UNMAP_ADDR(mapping) |
| }; |
| |
| static const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
| static spinlock_t map_lock; |
| static DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS * 2); |
| |
| static void ib_umad_add_one(struct ib_device *device); |
| static void ib_umad_remove_one(struct ib_device *device); |
| |
| static int queue_packet(struct ib_umad_file *file, |
| struct ib_mad_agent *agent, |
| struct ib_umad_packet *packet) |
| { |
| int ret = 1; |
| |
| down_read(&file->agent_mutex); |
| for (packet->mad.id = 0; |
| packet->mad.id < IB_UMAD_MAX_AGENTS; |
| packet->mad.id++) |
| if (agent == file->agent[packet->mad.id]) { |
| spin_lock_irq(&file->recv_lock); |
| list_add_tail(&packet->list, &file->recv_list); |
| spin_unlock_irq(&file->recv_lock); |
| wake_up_interruptible(&file->recv_wait); |
| ret = 0; |
| break; |
| } |
| |
| up_read(&file->agent_mutex); |
| |
| return ret; |
| } |
| |
| static void send_handler(struct ib_mad_agent *agent, |
| struct ib_mad_send_wc *send_wc) |
| { |
| struct ib_umad_file *file = agent->context; |
| struct ib_umad_packet *packet = |
| (void *) (unsigned long) send_wc->wr_id; |
| |
| dma_unmap_single(agent->device->dma_device, |
| pci_unmap_addr(packet, mapping), |
| sizeof packet->mad.data, |
| DMA_TO_DEVICE); |
| ib_destroy_ah(packet->ah); |
| |
| if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { |
| packet->mad.status = ETIMEDOUT; |
| |
| if (!queue_packet(file, agent, packet)) |
| return; |
| } |
| |
| kfree(packet); |
| } |
| |
| static void recv_handler(struct ib_mad_agent *agent, |
| struct ib_mad_recv_wc *mad_recv_wc) |
| { |
| struct ib_umad_file *file = agent->context; |
| struct ib_umad_packet *packet; |
| |
| if (mad_recv_wc->wc->status != IB_WC_SUCCESS) |
| goto out; |
| |
| packet = kmalloc(sizeof *packet, GFP_KERNEL); |
| if (!packet) |
| goto out; |
| |
| memset(packet, 0, sizeof *packet); |
| |
| memcpy(packet->mad.data, mad_recv_wc->recv_buf.mad, sizeof packet->mad.data); |
| packet->mad.status = 0; |
| packet->mad.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); |
| packet->mad.lid = cpu_to_be16(mad_recv_wc->wc->slid); |
| packet->mad.sl = mad_recv_wc->wc->sl; |
| packet->mad.path_bits = mad_recv_wc->wc->dlid_path_bits; |
| packet->mad.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); |
| if (packet->mad.grh_present) { |
| /* XXX parse GRH */ |
| packet->mad.gid_index = 0; |
| packet->mad.hop_limit = 0; |
| packet->mad.traffic_class = 0; |
| memset(packet->mad.gid, 0, 16); |
| packet->mad.flow_label = 0; |
| } |
| |
| if (queue_packet(file, agent, packet)) |
| kfree(packet); |
| |
| out: |
| ib_free_recv_mad(mad_recv_wc); |
| } |
| |
| static ssize_t ib_umad_read(struct file *filp, char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct ib_umad_file *file = filp->private_data; |
| struct ib_umad_packet *packet; |
| ssize_t ret; |
| |
| if (count < sizeof (struct ib_user_mad)) |
| return -EINVAL; |
| |
| spin_lock_irq(&file->recv_lock); |
| |
| while (list_empty(&file->recv_list)) { |
| spin_unlock_irq(&file->recv_lock); |
| |
| if (filp->f_flags & O_NONBLOCK) |
| return -EAGAIN; |
| |
| if (wait_event_interruptible(file->recv_wait, |
| !list_empty(&file->recv_list))) |
| return -ERESTARTSYS; |
| |
| spin_lock_irq(&file->recv_lock); |
| } |
| |
| packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); |
| list_del(&packet->list); |
| |
| spin_unlock_irq(&file->recv_lock); |
| |
| if (copy_to_user(buf, &packet->mad, sizeof packet->mad)) |
| ret = -EFAULT; |
| else |
| ret = sizeof packet->mad; |
| |
| kfree(packet); |
| return ret; |
| } |
| |
| static ssize_t ib_umad_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct ib_umad_file *file = filp->private_data; |
| struct ib_umad_packet *packet; |
| struct ib_mad_agent *agent; |
| struct ib_ah_attr ah_attr; |
| struct ib_sge gather_list; |
| struct ib_send_wr *bad_wr, wr = { |
| .opcode = IB_WR_SEND, |
| .sg_list = &gather_list, |
| .num_sge = 1, |
| .send_flags = IB_SEND_SIGNALED, |
| }; |
| u8 method; |
| u64 *tid; |
| int ret; |
| |
| if (count < sizeof (struct ib_user_mad)) |
| return -EINVAL; |
| |
| packet = kmalloc(sizeof *packet, GFP_KERNEL); |
| if (!packet) |
| return -ENOMEM; |
| |
| if (copy_from_user(&packet->mad, buf, sizeof packet->mad)) { |
| kfree(packet); |
| return -EFAULT; |
| } |
| |
| if (packet->mad.id < 0 || packet->mad.id >= IB_UMAD_MAX_AGENTS) { |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| down_read(&file->agent_mutex); |
| |
| agent = file->agent[packet->mad.id]; |
| if (!agent) { |
| ret = -EINVAL; |
| goto err_up; |
| } |
| |
| /* |
| * If userspace is generating a request that will generate a |
| * response, we need to make sure the high-order part of the |
| * transaction ID matches the agent being used to send the |
| * MAD. |
| */ |
| method = ((struct ib_mad_hdr *) packet->mad.data)->method; |
| |
| if (!(method & IB_MGMT_METHOD_RESP) && |
| method != IB_MGMT_METHOD_TRAP_REPRESS && |
| method != IB_MGMT_METHOD_SEND) { |
| tid = &((struct ib_mad_hdr *) packet->mad.data)->tid; |
| *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
| (be64_to_cpup(tid) & 0xffffffff)); |
| } |
| |
| memset(&ah_attr, 0, sizeof ah_attr); |
| ah_attr.dlid = be16_to_cpu(packet->mad.lid); |
| ah_attr.sl = packet->mad.sl; |
| ah_attr.src_path_bits = packet->mad.path_bits; |
| ah_attr.port_num = file->port->port_num; |
| if (packet->mad.grh_present) { |
| ah_attr.ah_flags = IB_AH_GRH; |
| memcpy(ah_attr.grh.dgid.raw, packet->mad.gid, 16); |
| ah_attr.grh.flow_label = packet->mad.flow_label; |
| ah_attr.grh.hop_limit = packet->mad.hop_limit; |
| ah_attr.grh.traffic_class = packet->mad.traffic_class; |
| } |
| |
| packet->ah = ib_create_ah(agent->qp->pd, &ah_attr); |
| if (IS_ERR(packet->ah)) { |
| ret = PTR_ERR(packet->ah); |
| goto err_up; |
| } |
| |
| gather_list.addr = dma_map_single(agent->device->dma_device, |
| packet->mad.data, |
| sizeof packet->mad.data, |
| DMA_TO_DEVICE); |
| gather_list.length = sizeof packet->mad.data; |
| gather_list.lkey = file->mr[packet->mad.id]->lkey; |
| pci_unmap_addr_set(packet, mapping, gather_list.addr); |
| |
| wr.wr.ud.mad_hdr = (struct ib_mad_hdr *) packet->mad.data; |
| wr.wr.ud.ah = packet->ah; |
| wr.wr.ud.remote_qpn = be32_to_cpu(packet->mad.qpn); |
| wr.wr.ud.remote_qkey = be32_to_cpu(packet->mad.qkey); |
| wr.wr.ud.timeout_ms = packet->mad.timeout_ms; |
| |
| wr.wr_id = (unsigned long) packet; |
| |
| ret = ib_post_send_mad(agent, &wr, &bad_wr); |
| if (ret) { |
| dma_unmap_single(agent->device->dma_device, |
| pci_unmap_addr(packet, mapping), |
| sizeof packet->mad.data, |
| DMA_TO_DEVICE); |
| goto err_up; |
| } |
| |
| up_read(&file->agent_mutex); |
| |
| return sizeof packet->mad; |
| |
| err_up: |
| up_read(&file->agent_mutex); |
| |
| err: |
| kfree(packet); |
| return ret; |
| } |
| |
| static unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) |
| { |
| struct ib_umad_file *file = filp->private_data; |
| |
| /* we will always be able to post a MAD send */ |
| unsigned int mask = POLLOUT | POLLWRNORM; |
| |
| poll_wait(filp, &file->recv_wait, wait); |
| |
| 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, |
| 0, 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); |