* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2008 Cisco. 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
#include <linux/cdev.h>
#include <linux/dma-mapping.h>
#include <linux/poll.h>
-#include <linux/rwsem.h>
+#include <linux/mutex.h>
#include <linux/kref.h>
+#include <linux/compat.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
struct class_device *sm_class_dev;
struct semaphore sm_sem;
- struct rw_semaphore mutex;
+ struct mutex file_mutex;
struct list_head file_list;
struct ib_device *ib_dev;
};
struct ib_umad_file {
+ struct mutex mutex;
struct ib_umad_port *port;
struct list_head recv_list;
struct list_head send_list;
struct list_head port_list;
- spinlock_t recv_lock;
spinlock_t send_lock;
wait_queue_head_t recv_wait;
struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS];
int agents_dead;
+ u8 use_pkey_index;
+ u8 already_used;
};
struct ib_umad_packet {
kfree(dev);
}
-/* caller must hold port->mutex at least for reading */
+static int hdr_size(struct ib_umad_file *file)
+{
+ return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) :
+ sizeof (struct ib_user_mad_hdr_old);
+}
+
+/* caller must hold file->mutex */
static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id)
{
return file->agents_dead ? NULL : file->agent[id];
{
int ret = 1;
- down_read(&file->port->mutex);
+ mutex_lock(&file->mutex);
for (packet->mad.hdr.id = 0;
packet->mad.hdr.id < IB_UMAD_MAX_AGENTS;
packet->mad.hdr.id++)
if (agent == __get_agent(file, packet->mad.hdr.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->port->mutex);
+ mutex_unlock(&file->mutex);
return ret;
}
static void dequeue_send(struct ib_umad_file *file,
struct ib_umad_packet *packet)
- {
+{
spin_lock_irq(&file->send_lock);
list_del(&packet->list);
spin_unlock_irq(&file->send_lock);
- }
+}
static void send_handler(struct ib_mad_agent *agent,
struct ib_mad_send_wc *send_wc)
packet->length = mad_recv_wc->mad_len;
packet->recv_wc = mad_recv_wc;
- packet->mad.hdr.status = 0;
- packet->mad.hdr.length = sizeof (struct ib_user_mad) +
- mad_recv_wc->mad_len;
- packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
- packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid);
- packet->mad.hdr.sl = mad_recv_wc->wc->sl;
- packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits;
+ packet->mad.hdr.status = 0;
+ packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len;
+ packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp);
+ packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid);
+ packet->mad.hdr.sl = mad_recv_wc->wc->sl;
+ packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits;
+ packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index;
packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH);
if (packet->mad.hdr.grh_present) {
struct ib_ah_attr ah_attr;
ib_free_recv_mad(mad_recv_wc);
}
-static ssize_t copy_recv_mad(char __user *buf, struct ib_umad_packet *packet,
- size_t count)
+static ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf,
+ struct ib_umad_packet *packet, size_t count)
{
struct ib_mad_recv_buf *recv_buf;
int left, seg_payload, offset, max_seg_payload;
/* We need enough room to copy the first (or only) MAD segment. */
recv_buf = &packet->recv_wc->recv_buf;
if ((packet->length <= sizeof (*recv_buf->mad) &&
- count < sizeof (packet->mad) + packet->length) ||
+ count < hdr_size(file) + packet->length) ||
(packet->length > sizeof (*recv_buf->mad) &&
- count < sizeof (packet->mad) + sizeof (*recv_buf->mad)))
+ count < hdr_size(file) + sizeof (*recv_buf->mad)))
return -EINVAL;
- if (copy_to_user(buf, &packet->mad, sizeof (packet->mad)))
+ if (copy_to_user(buf, &packet->mad, hdr_size(file)))
return -EFAULT;
- buf += sizeof (packet->mad);
+ buf += hdr_size(file);
seg_payload = min_t(int, packet->length, sizeof (*recv_buf->mad));
if (copy_to_user(buf, recv_buf->mad, seg_payload))
return -EFAULT;
* Multipacket RMPP MAD message. Copy remainder of message.
* Note that last segment may have a shorter payload.
*/
- if (count < sizeof (packet->mad) + packet->length) {
+ if (count < hdr_size(file) + packet->length) {
/*
* The buffer is too small, return the first RMPP segment,
* which includes the RMPP message length.
return -EFAULT;
}
}
- return sizeof (packet->mad) + packet->length;
+ return hdr_size(file) + packet->length;
}
-static ssize_t copy_send_mad(char __user *buf, struct ib_umad_packet *packet,
- size_t count)
+static ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf,
+ struct ib_umad_packet *packet, size_t count)
{
- ssize_t size = sizeof (packet->mad) + packet->length;
+ ssize_t size = hdr_size(file) + packet->length;
if (count < size)
return -EINVAL;
- if (copy_to_user(buf, &packet->mad, size))
+ if (copy_to_user(buf, &packet->mad, hdr_size(file)))
+ return -EFAULT;
+
+ buf += hdr_size(file);
+
+ if (copy_to_user(buf, packet->mad.data, packet->length))
return -EFAULT;
return size;
struct ib_umad_packet *packet;
ssize_t ret;
- if (count < sizeof (struct ib_user_mad))
+ if (count < hdr_size(file))
return -EINVAL;
- spin_lock_irq(&file->recv_lock);
+ mutex_lock(&file->mutex);
while (list_empty(&file->recv_list)) {
- spin_unlock_irq(&file->recv_lock);
+ mutex_unlock(&file->mutex);
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
!list_empty(&file->recv_list)))
return -ERESTARTSYS;
- spin_lock_irq(&file->recv_lock);
+ mutex_lock(&file->mutex);
}
packet = list_entry(file->recv_list.next, struct ib_umad_packet, list);
list_del(&packet->list);
- spin_unlock_irq(&file->recv_lock);
+ mutex_unlock(&file->mutex);
if (packet->recv_wc)
- ret = copy_recv_mad(buf, packet, count);
+ ret = copy_recv_mad(file, buf, packet, count);
else
- ret = copy_send_mad(buf, packet, count);
+ ret = copy_send_mad(file, buf, packet, count);
if (ret < 0) {
/* Requeue packet */
- spin_lock_irq(&file->recv_lock);
+ mutex_lock(&file->mutex);
list_add(&packet->list, &file->recv_list);
- spin_unlock_irq(&file->recv_lock);
+ mutex_unlock(&file->mutex);
} else {
if (packet->recv_wc)
ib_free_recv_mad(packet->recv_wc);
__be64 *tid;
int ret, data_len, hdr_len, copy_offset, rmpp_active;
- if (count < sizeof (struct ib_user_mad) + IB_MGMT_RMPP_HDR)
+ if (count < hdr_size(file) + IB_MGMT_RMPP_HDR)
return -EINVAL;
packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL);
if (!packet)
return -ENOMEM;
- if (copy_from_user(&packet->mad, buf,
- sizeof (struct ib_user_mad) + IB_MGMT_RMPP_HDR)) {
+ if (copy_from_user(&packet->mad, buf, hdr_size(file))) {
ret = -EFAULT;
goto err;
}
goto err;
}
- down_read(&file->port->mutex);
+ buf += hdr_size(file);
+
+ if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) {
+ ret = -EFAULT;
+ goto err;
+ }
+
+ mutex_lock(&file->mutex);
agent = __get_agent(file, packet->mad.hdr.id);
if (!agent) {
IB_MGMT_RMPP_FLAG_ACTIVE;
}
- data_len = count - sizeof (struct ib_user_mad) - hdr_len;
+ data_len = count - hdr_size(file) - hdr_len;
packet->msg = ib_create_send_mad(agent,
be32_to_cpu(packet->mad.hdr.qpn),
- 0, rmpp_active, hdr_len,
- data_len, GFP_KERNEL);
+ packet->mad.hdr.pkey_index, rmpp_active,
+ hdr_len, data_len, GFP_KERNEL);
if (IS_ERR(packet->msg)) {
ret = PTR_ERR(packet->msg);
goto err_ah;
/* Copy MAD header. Any RMPP header is already in place. */
memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR);
- buf += sizeof (struct ib_user_mad);
if (!rmpp_active) {
if (copy_from_user(packet->msg->mad + copy_offset,
if (ret)
goto err_send;
- up_read(&file->port->mutex);
+ mutex_unlock(&file->mutex);
return count;
err_send:
err_ah:
ib_destroy_ah(ah);
err_up:
- up_read(&file->port->mutex);
+ mutex_unlock(&file->mutex);
err:
kfree(packet);
return ret;
return mask;
}
-static int ib_umad_reg_agent(struct ib_umad_file *file, unsigned long arg)
+static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,
+ int compat_method_mask)
{
struct ib_user_mad_reg_req ureq;
struct ib_mad_reg_req req;
- struct ib_mad_agent *agent;
+ struct ib_mad_agent *agent = NULL;
int agent_id;
int ret;
- down_write(&file->port->mutex);
+ mutex_lock(&file->port->file_mutex);
+ mutex_lock(&file->mutex);
if (!file->port->ib_dev) {
ret = -EPIPE;
goto out;
}
- if (copy_from_user(&ureq, (void __user *) arg, sizeof ureq)) {
+ if (copy_from_user(&ureq, arg, sizeof ureq)) {
ret = -EFAULT;
goto out;
}
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);
+ memcpy(req.oui, ureq.oui, sizeof req.oui);
+
+ if (compat_method_mask) {
+ u32 *umm = (u32 *) ureq.method_mask;
+ int i;
+
+ for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i)
+ req.method_mask[i] =
+ umm[i * 2] | ((u64) umm[i * 2 + 1] << 32);
+ } else
+ memcpy(req.method_mask, ureq.method_mask,
+ sizeof req.method_mask);
}
agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
send_handler, recv_handler, file);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
+ agent = NULL;
goto out;
}
if (put_user(agent_id,
(u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {
ret = -EFAULT;
- ib_unregister_mad_agent(agent);
goto out;
}
+ if (!file->already_used) {
+ file->already_used = 1;
+ if (!file->use_pkey_index) {
+ printk(KERN_WARNING "user_mad: process %s did not enable "
+ "P_Key index support.\n", current->comm);
+ printk(KERN_WARNING "user_mad: Documentation/infiniband/user_mad.txt "
+ "has info on the new ABI.\n");
+ }
+ }
+
file->agent[agent_id] = agent;
ret = 0;
out:
- up_write(&file->port->mutex);
+ mutex_unlock(&file->mutex);
+
+ if (ret && agent)
+ ib_unregister_mad_agent(agent);
+
+ mutex_unlock(&file->port->file_mutex);
+
return ret;
}
-static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg)
+static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg)
{
struct ib_mad_agent *agent = NULL;
u32 id;
int ret = 0;
- if (get_user(id, (u32 __user *) arg))
+ if (get_user(id, arg))
return -EFAULT;
- down_write(&file->port->mutex);
+ mutex_lock(&file->port->file_mutex);
+ mutex_lock(&file->mutex);
if (id < 0 || id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) {
ret = -EINVAL;
file->agent[id] = NULL;
out:
- up_write(&file->port->mutex);
+ mutex_unlock(&file->mutex);
if (agent)
ib_unregister_mad_agent(agent);
+ mutex_unlock(&file->port->file_mutex);
+
+ return ret;
+}
+
+static long ib_umad_enable_pkey(struct ib_umad_file *file)
+{
+ int ret = 0;
+
+ mutex_lock(&file->mutex);
+ if (file->already_used)
+ ret = -EINVAL;
+ else
+ file->use_pkey_index = 1;
+ mutex_unlock(&file->mutex);
+
return ret;
}
{
switch (cmd) {
case IB_USER_MAD_REGISTER_AGENT:
- return ib_umad_reg_agent(filp->private_data, arg);
+ return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0);
+ case IB_USER_MAD_UNREGISTER_AGENT:
+ return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg);
+ case IB_USER_MAD_ENABLE_PKEY:
+ return ib_umad_enable_pkey(filp->private_data);
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+static long ib_umad_compat_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, compat_ptr(arg), 1);
case IB_USER_MAD_UNREGISTER_AGENT:
- return ib_umad_unreg_agent(filp->private_data, arg);
+ return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg));
+ case IB_USER_MAD_ENABLE_PKEY:
+ return ib_umad_enable_pkey(filp->private_data);
default:
return -ENOIOCTLCMD;
}
}
+#endif
static int ib_umad_open(struct inode *inode, struct file *filp)
{
if (!port)
return -ENXIO;
- down_write(&port->mutex);
+ mutex_lock(&port->file_mutex);
if (!port->ib_dev) {
ret = -ENXIO;
goto out;
}
- spin_lock_init(&file->recv_lock);
+ mutex_init(&file->mutex);
spin_lock_init(&file->send_lock);
INIT_LIST_HEAD(&file->recv_list);
INIT_LIST_HEAD(&file->send_list);
list_add_tail(&file->port_list, &port->file_list);
out:
- up_write(&port->mutex);
+ mutex_unlock(&port->file_mutex);
return ret;
}
int already_dead;
int i;
- down_write(&file->port->mutex);
+ mutex_lock(&file->port->file_mutex);
+ mutex_lock(&file->mutex);
already_dead = file->agents_dead;
file->agents_dead = 1;
list_del(&file->port_list);
- downgrade_write(&file->port->mutex);
+ mutex_unlock(&file->mutex);
if (!already_dead)
for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i)
if (file->agent[i])
ib_unregister_mad_agent(file->agent[i]);
- up_read(&file->port->mutex);
+ mutex_unlock(&file->port->file_mutex);
kfree(file);
kref_put(&dev->ref, ib_umad_release_dev);
.write = ib_umad_write,
.poll = ib_umad_poll,
.unlocked_ioctl = ib_umad_ioctl,
- .compat_ioctl = ib_umad_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ib_umad_compat_ioctl,
+#endif
.open = ib_umad_open,
.release = ib_umad_close
};
};
int ret = 0;
- down_write(&port->mutex);
+ mutex_lock(&port->file_mutex);
if (port->ib_dev)
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props);
- up_write(&port->mutex);
+ mutex_unlock(&port->file_mutex);
up(&port->sm_sem);
port->ib_dev = device;
port->port_num = port_num;
init_MUTEX(&port->sm_sem);
- init_rwsem(&port->mutex);
+ mutex_init(&port->file_mutex);
INIT_LIST_HEAD(&port->file_list);
port->dev = cdev_alloc();
static void ib_umad_kill_port(struct ib_umad_port *port)
{
struct ib_umad_file *file;
+ int already_dead;
int id;
class_set_devdata(port->class_dev, NULL);
umad_port[port->dev_num] = NULL;
spin_unlock(&port_lock);
- down_write(&port->mutex);
+ mutex_lock(&port->file_mutex);
port->ib_dev = NULL;
- /*
- * Now go through the list of files attached to this port and
- * unregister all of their MAD agents. We need to hold
- * port->mutex while doing this to avoid racing with
- * ib_umad_close(), but we can't hold the mutex for writing
- * while calling ib_unregister_mad_agent(), since that might
- * deadlock by calling back into queue_packet(). So we
- * downgrade our lock to a read lock, and then drop and
- * reacquire the write lock for the next iteration.
- *
- * We do list_del_init() on the file's list_head so that the
- * list_del in ib_umad_close() is still OK, even after the
- * file is removed from the list.
- */
- while (!list_empty(&port->file_list)) {
- file = list_entry(port->file_list.next, struct ib_umad_file,
- port_list);
-
+ list_for_each_entry(file, &port->file_list, port_list) {
+ mutex_lock(&file->mutex);
+ already_dead = file->agents_dead;
file->agents_dead = 1;
- list_del_init(&file->port_list);
-
- downgrade_write(&port->mutex);
+ mutex_unlock(&file->mutex);
for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id)
if (file->agent[id])
ib_unregister_mad_agent(file->agent[id]);
-
- up_read(&port->mutex);
- down_write(&port->mutex);
}
- up_write(&port->mutex);
+ mutex_unlock(&port->file_mutex);
clear_bit(port->dev_num, dev_map);
}
projects / linux-2.6-omap-h63xx.git / blobdiff