--- /dev/null
+/*
+ * 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:
+ 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,
+ &req, 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;
+ 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]);
+ }
+
+ 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);
git://git.onelab.eu / linux-2.6.git / blobdiff