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1499 lines
36 KiB
1499 lines
36 KiB
/* |
|
* 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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* Copyright (c) 2008 Cisco. 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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|
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#define pr_fmt(fmt) "user_mad: " fmt |
|
|
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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/dma-mapping.h> |
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#include <linux/poll.h> |
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#include <linux/mutex.h> |
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#include <linux/kref.h> |
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#include <linux/compat.h> |
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#include <linux/sched.h> |
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#include <linux/semaphore.h> |
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#include <linux/slab.h> |
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#include <linux/nospec.h> |
|
|
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#include <linux/uaccess.h> |
|
|
|
#include <rdma/ib_mad.h> |
|
#include <rdma/ib_user_mad.h> |
|
#include <rdma/rdma_netlink.h> |
|
|
|
#include "core_priv.h" |
|
|
|
MODULE_AUTHOR("Roland Dreier"); |
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MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); |
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MODULE_LICENSE("Dual BSD/GPL"); |
|
|
|
enum { |
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IB_UMAD_MAX_PORTS = RDMA_MAX_PORTS, |
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IB_UMAD_MAX_AGENTS = 32, |
|
|
|
IB_UMAD_MAJOR = 231, |
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IB_UMAD_MINOR_BASE = 0, |
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IB_UMAD_NUM_FIXED_MINOR = 64, |
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IB_UMAD_NUM_DYNAMIC_MINOR = IB_UMAD_MAX_PORTS - IB_UMAD_NUM_FIXED_MINOR, |
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IB_ISSM_MINOR_BASE = IB_UMAD_NUM_FIXED_MINOR, |
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}; |
|
|
|
/* |
|
* Our lifetime rules for these structs are the following: |
|
* device special file is opened, we take a reference on the |
|
* ib_umad_port's struct ib_umad_device. We drop these |
|
* references in the corresponding close(). |
|
* |
|
* In addition to references coming from open character devices, there |
|
* is one more reference to each ib_umad_device representing the |
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* module's reference taken when allocating the ib_umad_device in |
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* ib_umad_add_one(). |
|
* |
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* When destroying an ib_umad_device, we drop the module's reference. |
|
*/ |
|
|
|
struct ib_umad_port { |
|
struct cdev cdev; |
|
struct device dev; |
|
struct cdev sm_cdev; |
|
struct device sm_dev; |
|
struct semaphore sm_sem; |
|
|
|
struct mutex file_mutex; |
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struct list_head file_list; |
|
|
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struct ib_device *ib_dev; |
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struct ib_umad_device *umad_dev; |
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int dev_num; |
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u8 port_num; |
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}; |
|
|
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struct ib_umad_device { |
|
struct kref kref; |
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struct ib_umad_port ports[]; |
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}; |
|
|
|
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 send_lock; |
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wait_queue_head_t recv_wait; |
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struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; |
|
int agents_dead; |
|
u8 use_pkey_index; |
|
u8 already_used; |
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}; |
|
|
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struct ib_umad_packet { |
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struct ib_mad_send_buf *msg; |
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struct ib_mad_recv_wc *recv_wc; |
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struct list_head list; |
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int length; |
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struct ib_user_mad mad; |
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}; |
|
|
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#define CREATE_TRACE_POINTS |
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#include <trace/events/ib_umad.h> |
|
|
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static const dev_t base_umad_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); |
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static const dev_t base_issm_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE) + |
|
IB_UMAD_NUM_FIXED_MINOR; |
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static dev_t dynamic_umad_dev; |
|
static dev_t dynamic_issm_dev; |
|
|
|
static DEFINE_IDA(umad_ida); |
|
|
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static int ib_umad_add_one(struct ib_device *device); |
|
static void ib_umad_remove_one(struct ib_device *device, void *client_data); |
|
|
|
static void ib_umad_dev_free(struct kref *kref) |
|
{ |
|
struct ib_umad_device *dev = |
|
container_of(kref, struct ib_umad_device, kref); |
|
|
|
kfree(dev); |
|
} |
|
|
|
static void ib_umad_dev_get(struct ib_umad_device *dev) |
|
{ |
|
kref_get(&dev->kref); |
|
} |
|
|
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static void ib_umad_dev_put(struct ib_umad_device *dev) |
|
{ |
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kref_put(&dev->kref, ib_umad_dev_free); |
|
} |
|
|
|
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]; |
|
} |
|
|
|
static int queue_packet(struct ib_umad_file *file, |
|
struct ib_mad_agent *agent, |
|
struct ib_umad_packet *packet) |
|
{ |
|
int ret = 1; |
|
|
|
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)) { |
|
list_add_tail(&packet->list, &file->recv_list); |
|
wake_up_interruptible(&file->recv_wait); |
|
ret = 0; |
|
break; |
|
} |
|
|
|
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) |
|
{ |
|
struct ib_umad_file *file = agent->context; |
|
struct ib_umad_packet *packet = send_wc->send_buf->context[0]; |
|
|
|
dequeue_send(file, packet); |
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rdma_destroy_ah(packet->msg->ah, RDMA_DESTROY_AH_SLEEPABLE); |
|
ib_free_send_mad(packet->msg); |
|
|
|
if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { |
|
packet->length = IB_MGMT_MAD_HDR; |
|
packet->mad.hdr.status = ETIMEDOUT; |
|
if (!queue_packet(file, agent, packet)) |
|
return; |
|
} |
|
kfree(packet); |
|
} |
|
|
|
static void recv_handler(struct ib_mad_agent *agent, |
|
struct ib_mad_send_buf *send_buf, |
|
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 err1; |
|
|
|
packet = kzalloc(sizeof *packet, GFP_KERNEL); |
|
if (!packet) |
|
goto err1; |
|
|
|
packet->length = mad_recv_wc->mad_len; |
|
packet->recv_wc = mad_recv_wc; |
|
|
|
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); |
|
/* |
|
* On OPA devices it is okay to lose the upper 16 bits of LID as this |
|
* information is obtained elsewhere. Mask off the upper 16 bits. |
|
*/ |
|
if (rdma_cap_opa_mad(agent->device, agent->port_num)) |
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packet->mad.hdr.lid = ib_lid_be16(0xFFFF & |
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mad_recv_wc->wc->slid); |
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else |
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packet->mad.hdr.lid = ib_lid_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.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 rdma_ah_attr ah_attr; |
|
const struct ib_global_route *grh; |
|
int ret; |
|
|
|
ret = ib_init_ah_attr_from_wc(agent->device, agent->port_num, |
|
mad_recv_wc->wc, |
|
mad_recv_wc->recv_buf.grh, |
|
&ah_attr); |
|
if (ret) |
|
goto err2; |
|
|
|
grh = rdma_ah_read_grh(&ah_attr); |
|
packet->mad.hdr.gid_index = grh->sgid_index; |
|
packet->mad.hdr.hop_limit = grh->hop_limit; |
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packet->mad.hdr.traffic_class = grh->traffic_class; |
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memcpy(packet->mad.hdr.gid, &grh->dgid, 16); |
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packet->mad.hdr.flow_label = cpu_to_be32(grh->flow_label); |
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rdma_destroy_ah_attr(&ah_attr); |
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} |
|
|
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if (queue_packet(file, agent, packet)) |
|
goto err2; |
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return; |
|
|
|
err2: |
|
kfree(packet); |
|
err1: |
|
ib_free_recv_mad(mad_recv_wc); |
|
} |
|
|
|
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; |
|
size_t seg_size; |
|
|
|
recv_buf = &packet->recv_wc->recv_buf; |
|
seg_size = packet->recv_wc->mad_seg_size; |
|
|
|
/* We need enough room to copy the first (or only) MAD segment. */ |
|
if ((packet->length <= seg_size && |
|
count < hdr_size(file) + packet->length) || |
|
(packet->length > seg_size && |
|
count < hdr_size(file) + seg_size)) |
|
return -EINVAL; |
|
|
|
if (copy_to_user(buf, &packet->mad, hdr_size(file))) |
|
return -EFAULT; |
|
|
|
buf += hdr_size(file); |
|
seg_payload = min_t(int, packet->length, seg_size); |
|
if (copy_to_user(buf, recv_buf->mad, seg_payload)) |
|
return -EFAULT; |
|
|
|
if (seg_payload < packet->length) { |
|
/* |
|
* Multipacket RMPP MAD message. Copy remainder of message. |
|
* Note that last segment may have a shorter payload. |
|
*/ |
|
if (count < hdr_size(file) + packet->length) { |
|
/* |
|
* The buffer is too small, return the first RMPP segment, |
|
* which includes the RMPP message length. |
|
*/ |
|
return -ENOSPC; |
|
} |
|
offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); |
|
max_seg_payload = seg_size - offset; |
|
|
|
for (left = packet->length - seg_payload, buf += seg_payload; |
|
left; left -= seg_payload, buf += seg_payload) { |
|
recv_buf = container_of(recv_buf->list.next, |
|
struct ib_mad_recv_buf, list); |
|
seg_payload = min(left, max_seg_payload); |
|
if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, |
|
seg_payload)) |
|
return -EFAULT; |
|
} |
|
} |
|
|
|
trace_ib_umad_read_recv(file, &packet->mad.hdr, &recv_buf->mad->mad_hdr); |
|
|
|
return hdr_size(file) + packet->length; |
|
} |
|
|
|
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 = hdr_size(file) + packet->length; |
|
|
|
if (count < size) |
|
return -EINVAL; |
|
|
|
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; |
|
|
|
trace_ib_umad_read_send(file, &packet->mad.hdr, |
|
(struct ib_mad_hdr *)&packet->mad.data); |
|
|
|
return size; |
|
} |
|
|
|
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 < hdr_size(file)) |
|
return -EINVAL; |
|
|
|
mutex_lock(&file->mutex); |
|
|
|
if (file->agents_dead) { |
|
mutex_unlock(&file->mutex); |
|
return -EIO; |
|
} |
|
|
|
while (list_empty(&file->recv_list)) { |
|
mutex_unlock(&file->mutex); |
|
|
|
if (filp->f_flags & O_NONBLOCK) |
|
return -EAGAIN; |
|
|
|
if (wait_event_interruptible(file->recv_wait, |
|
!list_empty(&file->recv_list))) |
|
return -ERESTARTSYS; |
|
|
|
mutex_lock(&file->mutex); |
|
} |
|
|
|
if (file->agents_dead) { |
|
mutex_unlock(&file->mutex); |
|
return -EIO; |
|
} |
|
|
|
packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); |
|
list_del(&packet->list); |
|
|
|
mutex_unlock(&file->mutex); |
|
|
|
if (packet->recv_wc) |
|
ret = copy_recv_mad(file, buf, packet, count); |
|
else |
|
ret = copy_send_mad(file, buf, packet, count); |
|
|
|
if (ret < 0) { |
|
/* Requeue packet */ |
|
mutex_lock(&file->mutex); |
|
list_add(&packet->list, &file->recv_list); |
|
mutex_unlock(&file->mutex); |
|
} else { |
|
if (packet->recv_wc) |
|
ib_free_recv_mad(packet->recv_wc); |
|
kfree(packet); |
|
} |
|
return ret; |
|
} |
|
|
|
static int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) |
|
{ |
|
int left, seg; |
|
|
|
/* Copy class specific header */ |
|
if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && |
|
copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, |
|
msg->hdr_len - IB_MGMT_RMPP_HDR)) |
|
return -EFAULT; |
|
|
|
/* All headers are in place. Copy data segments. */ |
|
for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; |
|
seg++, left -= msg->seg_size, buf += msg->seg_size) { |
|
if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, |
|
min(left, msg->seg_size))) |
|
return -EFAULT; |
|
} |
|
return 0; |
|
} |
|
|
|
static int same_destination(struct ib_user_mad_hdr *hdr1, |
|
struct ib_user_mad_hdr *hdr2) |
|
{ |
|
if (!hdr1->grh_present && !hdr2->grh_present) |
|
return (hdr1->lid == hdr2->lid); |
|
|
|
if (hdr1->grh_present && hdr2->grh_present) |
|
return !memcmp(hdr1->gid, hdr2->gid, 16); |
|
|
|
return 0; |
|
} |
|
|
|
static int is_duplicate(struct ib_umad_file *file, |
|
struct ib_umad_packet *packet) |
|
{ |
|
struct ib_umad_packet *sent_packet; |
|
struct ib_mad_hdr *sent_hdr, *hdr; |
|
|
|
hdr = (struct ib_mad_hdr *) packet->mad.data; |
|
list_for_each_entry(sent_packet, &file->send_list, list) { |
|
sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; |
|
|
|
if ((hdr->tid != sent_hdr->tid) || |
|
(hdr->mgmt_class != sent_hdr->mgmt_class)) |
|
continue; |
|
|
|
/* |
|
* No need to be overly clever here. If two new operations have |
|
* the same TID, reject the second as a duplicate. This is more |
|
* restrictive than required by the spec. |
|
*/ |
|
if (!ib_response_mad(hdr)) { |
|
if (!ib_response_mad(sent_hdr)) |
|
return 1; |
|
continue; |
|
} else if (!ib_response_mad(sent_hdr)) |
|
continue; |
|
|
|
if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) |
|
return 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
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 rdma_ah_attr ah_attr; |
|
struct ib_ah *ah; |
|
struct ib_rmpp_mad *rmpp_mad; |
|
__be64 *tid; |
|
int ret, data_len, hdr_len, copy_offset, rmpp_active; |
|
u8 base_version; |
|
|
|
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, hdr_size(file))) { |
|
ret = -EFAULT; |
|
goto err; |
|
} |
|
|
|
if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
|
|
buf += hdr_size(file); |
|
|
|
if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { |
|
ret = -EFAULT; |
|
goto err; |
|
} |
|
|
|
mutex_lock(&file->mutex); |
|
|
|
trace_ib_umad_write(file, &packet->mad.hdr, |
|
(struct ib_mad_hdr *)&packet->mad.data); |
|
|
|
agent = __get_agent(file, packet->mad.hdr.id); |
|
if (!agent) { |
|
ret = -EIO; |
|
goto err_up; |
|
} |
|
|
|
memset(&ah_attr, 0, sizeof ah_attr); |
|
ah_attr.type = rdma_ah_find_type(agent->device, |
|
file->port->port_num); |
|
rdma_ah_set_dlid(&ah_attr, be16_to_cpu(packet->mad.hdr.lid)); |
|
rdma_ah_set_sl(&ah_attr, packet->mad.hdr.sl); |
|
rdma_ah_set_path_bits(&ah_attr, packet->mad.hdr.path_bits); |
|
rdma_ah_set_port_num(&ah_attr, file->port->port_num); |
|
if (packet->mad.hdr.grh_present) { |
|
rdma_ah_set_grh(&ah_attr, NULL, |
|
be32_to_cpu(packet->mad.hdr.flow_label), |
|
packet->mad.hdr.gid_index, |
|
packet->mad.hdr.hop_limit, |
|
packet->mad.hdr.traffic_class); |
|
rdma_ah_set_dgid_raw(&ah_attr, packet->mad.hdr.gid); |
|
} |
|
|
|
ah = rdma_create_user_ah(agent->qp->pd, &ah_attr, NULL); |
|
if (IS_ERR(ah)) { |
|
ret = PTR_ERR(ah); |
|
goto err_up; |
|
} |
|
|
|
rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; |
|
hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
|
|
|
if (ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) |
|
&& ib_mad_kernel_rmpp_agent(agent)) { |
|
copy_offset = IB_MGMT_RMPP_HDR; |
|
rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
|
IB_MGMT_RMPP_FLAG_ACTIVE; |
|
} else { |
|
copy_offset = IB_MGMT_MAD_HDR; |
|
rmpp_active = 0; |
|
} |
|
|
|
base_version = ((struct ib_mad_hdr *)&packet->mad.data)->base_version; |
|
data_len = count - hdr_size(file) - hdr_len; |
|
packet->msg = ib_create_send_mad(agent, |
|
be32_to_cpu(packet->mad.hdr.qpn), |
|
packet->mad.hdr.pkey_index, rmpp_active, |
|
hdr_len, data_len, GFP_KERNEL, |
|
base_version); |
|
if (IS_ERR(packet->msg)) { |
|
ret = PTR_ERR(packet->msg); |
|
goto err_ah; |
|
} |
|
|
|
packet->msg->ah = ah; |
|
packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; |
|
packet->msg->retries = packet->mad.hdr.retries; |
|
packet->msg->context[0] = packet; |
|
|
|
/* Copy MAD header. Any RMPP header is already in place. */ |
|
memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); |
|
|
|
if (!rmpp_active) { |
|
if (copy_from_user(packet->msg->mad + copy_offset, |
|
buf + copy_offset, |
|
hdr_len + data_len - copy_offset)) { |
|
ret = -EFAULT; |
|
goto err_msg; |
|
} |
|
} else { |
|
ret = copy_rmpp_mad(packet->msg, buf); |
|
if (ret) |
|
goto err_msg; |
|
} |
|
|
|
/* |
|
* Set the high-order part of the transaction ID to make MADs from |
|
* different agents unique, and allow routing responses back to the |
|
* original requestor. |
|
*/ |
|
if (!ib_response_mad(packet->msg->mad)) { |
|
tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; |
|
*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | |
|
(be64_to_cpup(tid) & 0xffffffff)); |
|
rmpp_mad->mad_hdr.tid = *tid; |
|
} |
|
|
|
if (!ib_mad_kernel_rmpp_agent(agent) |
|
&& ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class) |
|
&& (ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_ACTIVE)) { |
|
spin_lock_irq(&file->send_lock); |
|
list_add_tail(&packet->list, &file->send_list); |
|
spin_unlock_irq(&file->send_lock); |
|
} else { |
|
spin_lock_irq(&file->send_lock); |
|
ret = is_duplicate(file, packet); |
|
if (!ret) |
|
list_add_tail(&packet->list, &file->send_list); |
|
spin_unlock_irq(&file->send_lock); |
|
if (ret) { |
|
ret = -EINVAL; |
|
goto err_msg; |
|
} |
|
} |
|
|
|
ret = ib_post_send_mad(packet->msg, NULL); |
|
if (ret) |
|
goto err_send; |
|
|
|
mutex_unlock(&file->mutex); |
|
return count; |
|
|
|
err_send: |
|
dequeue_send(file, packet); |
|
err_msg: |
|
ib_free_send_mad(packet->msg); |
|
err_ah: |
|
rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE); |
|
err_up: |
|
mutex_unlock(&file->mutex); |
|
err: |
|
kfree(packet); |
|
return ret; |
|
} |
|
|
|
static __poll_t 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 */ |
|
__poll_t mask = EPOLLOUT | EPOLLWRNORM; |
|
|
|
mutex_lock(&file->mutex); |
|
poll_wait(filp, &file->recv_wait, wait); |
|
|
|
if (!list_empty(&file->recv_list)) |
|
mask |= EPOLLIN | EPOLLRDNORM; |
|
if (file->agents_dead) |
|
mask = EPOLLERR; |
|
mutex_unlock(&file->mutex); |
|
|
|
return mask; |
|
} |
|
|
|
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 = NULL; |
|
int agent_id; |
|
int ret; |
|
|
|
mutex_lock(&file->port->file_mutex); |
|
mutex_lock(&file->mutex); |
|
|
|
if (!file->port->ib_dev) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent: invalid device\n"); |
|
ret = -EPIPE; |
|
goto out; |
|
} |
|
|
|
if (copy_from_user(&ureq, arg, sizeof ureq)) { |
|
ret = -EFAULT; |
|
goto out; |
|
} |
|
|
|
if (ureq.qpn != 0 && ureq.qpn != 1) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent: invalid QPN %d specified\n", |
|
ureq.qpn); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) |
|
if (!__get_agent(file, agent_id)) |
|
goto found; |
|
|
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent: Max Agents (%u) reached\n", |
|
IB_UMAD_MAX_AGENTS); |
|
ret = -ENOMEM; |
|
goto out; |
|
|
|
found: |
|
if (ureq.mgmt_class) { |
|
memset(&req, 0, sizeof(req)); |
|
req.mgmt_class = ureq.mgmt_class; |
|
req.mgmt_class_version = ureq.mgmt_class_version; |
|
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, |
|
ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, |
|
ureq.mgmt_class ? &req : NULL, |
|
ureq.rmpp_version, |
|
send_handler, recv_handler, file, 0); |
|
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; |
|
goto out; |
|
} |
|
|
|
if (!file->already_used) { |
|
file->already_used = 1; |
|
if (!file->use_pkey_index) { |
|
dev_warn(&file->port->dev, |
|
"process %s did not enable P_Key index support.\n", |
|
current->comm); |
|
dev_warn(&file->port->dev, |
|
" Documentation/infiniband/user_mad.rst has info on the new ABI.\n"); |
|
} |
|
} |
|
|
|
file->agent[agent_id] = agent; |
|
ret = 0; |
|
|
|
out: |
|
mutex_unlock(&file->mutex); |
|
|
|
if (ret && agent) |
|
ib_unregister_mad_agent(agent); |
|
|
|
mutex_unlock(&file->port->file_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg) |
|
{ |
|
struct ib_user_mad_reg_req2 ureq; |
|
struct ib_mad_reg_req req; |
|
struct ib_mad_agent *agent = NULL; |
|
int agent_id; |
|
int ret; |
|
|
|
mutex_lock(&file->port->file_mutex); |
|
mutex_lock(&file->mutex); |
|
|
|
if (!file->port->ib_dev) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent2: invalid device\n"); |
|
ret = -EPIPE; |
|
goto out; |
|
} |
|
|
|
if (copy_from_user(&ureq, arg, sizeof(ureq))) { |
|
ret = -EFAULT; |
|
goto out; |
|
} |
|
|
|
if (ureq.qpn != 0 && ureq.qpn != 1) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent2: invalid QPN %d specified\n", |
|
ureq.qpn); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n", |
|
ureq.flags, IB_USER_MAD_REG_FLAGS_CAP); |
|
ret = -EINVAL; |
|
|
|
if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP, |
|
(u32 __user *) (arg + offsetof(struct |
|
ib_user_mad_reg_req2, flags)))) |
|
ret = -EFAULT; |
|
|
|
goto out; |
|
} |
|
|
|
for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) |
|
if (!__get_agent(file, agent_id)) |
|
goto found; |
|
|
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent2: Max Agents (%u) reached\n", |
|
IB_UMAD_MAX_AGENTS); |
|
ret = -ENOMEM; |
|
goto out; |
|
|
|
found: |
|
if (ureq.mgmt_class) { |
|
memset(&req, 0, sizeof(req)); |
|
req.mgmt_class = ureq.mgmt_class; |
|
req.mgmt_class_version = ureq.mgmt_class_version; |
|
if (ureq.oui & 0xff000000) { |
|
dev_notice(&file->port->dev, |
|
"ib_umad_reg_agent2 failed: oui invalid 0x%08x\n", |
|
ureq.oui); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
req.oui[2] = ureq.oui & 0x0000ff; |
|
req.oui[1] = (ureq.oui & 0x00ff00) >> 8; |
|
req.oui[0] = (ureq.oui & 0xff0000) >> 16; |
|
memcpy(req.method_mask, ureq.method_mask, |
|
sizeof(req.method_mask)); |
|
} |
|
|
|
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, |
|
ureq.flags); |
|
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_req2, id)))) { |
|
ret = -EFAULT; |
|
goto out; |
|
} |
|
|
|
if (!file->already_used) { |
|
file->already_used = 1; |
|
file->use_pkey_index = 1; |
|
} |
|
|
|
file->agent[agent_id] = agent; |
|
ret = 0; |
|
|
|
out: |
|
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, u32 __user *arg) |
|
{ |
|
struct ib_mad_agent *agent = NULL; |
|
u32 id; |
|
int ret = 0; |
|
|
|
if (get_user(id, arg)) |
|
return -EFAULT; |
|
if (id >= IB_UMAD_MAX_AGENTS) |
|
return -EINVAL; |
|
|
|
mutex_lock(&file->port->file_mutex); |
|
mutex_lock(&file->mutex); |
|
|
|
id = array_index_nospec(id, IB_UMAD_MAX_AGENTS); |
|
if (!__get_agent(file, id)) { |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
agent = file->agent[id]; |
|
file->agent[id] = NULL; |
|
|
|
out: |
|
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; |
|
} |
|
|
|
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, (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); |
|
case IB_USER_MAD_REGISTER_AGENT2: |
|
return ib_umad_reg_agent2(filp->private_data, (void __user *) arg); |
|
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, compat_ptr(arg)); |
|
case IB_USER_MAD_ENABLE_PKEY: |
|
return ib_umad_enable_pkey(filp->private_data); |
|
case IB_USER_MAD_REGISTER_AGENT2: |
|
return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg)); |
|
default: |
|
return -ENOIOCTLCMD; |
|
} |
|
} |
|
#endif |
|
|
|
/* |
|
* ib_umad_open() does not need the BKL: |
|
* |
|
* - the ib_umad_port structures are properly reference counted, and |
|
* everything else is purely local to the file being created, so |
|
* races against other open calls are not a problem; |
|
* - the ioctl method does not affect any global state outside of the |
|
* file structure being operated on; |
|
*/ |
|
static int ib_umad_open(struct inode *inode, struct file *filp) |
|
{ |
|
struct ib_umad_port *port; |
|
struct ib_umad_file *file; |
|
int ret = 0; |
|
|
|
port = container_of(inode->i_cdev, struct ib_umad_port, cdev); |
|
|
|
mutex_lock(&port->file_mutex); |
|
|
|
if (!port->ib_dev) { |
|
ret = -ENXIO; |
|
goto out; |
|
} |
|
|
|
if (!rdma_dev_access_netns(port->ib_dev, current->nsproxy->net_ns)) { |
|
ret = -EPERM; |
|
goto out; |
|
} |
|
|
|
file = kzalloc(sizeof(*file), GFP_KERNEL); |
|
if (!file) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
mutex_init(&file->mutex); |
|
spin_lock_init(&file->send_lock); |
|
INIT_LIST_HEAD(&file->recv_list); |
|
INIT_LIST_HEAD(&file->send_list); |
|
init_waitqueue_head(&file->recv_wait); |
|
|
|
file->port = port; |
|
filp->private_data = file; |
|
|
|
list_add_tail(&file->port_list, &port->file_list); |
|
|
|
stream_open(inode, filp); |
|
out: |
|
mutex_unlock(&port->file_mutex); |
|
return ret; |
|
} |
|
|
|
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 already_dead; |
|
int i; |
|
|
|
mutex_lock(&file->port->file_mutex); |
|
mutex_lock(&file->mutex); |
|
|
|
already_dead = file->agents_dead; |
|
file->agents_dead = 1; |
|
|
|
list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { |
|
if (packet->recv_wc) |
|
ib_free_recv_mad(packet->recv_wc); |
|
kfree(packet); |
|
} |
|
|
|
list_del(&file->port_list); |
|
|
|
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]); |
|
|
|
mutex_unlock(&file->port->file_mutex); |
|
mutex_destroy(&file->mutex); |
|
kfree(file); |
|
return 0; |
|
} |
|
|
|
static const 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, |
|
#ifdef CONFIG_COMPAT |
|
.compat_ioctl = ib_umad_compat_ioctl, |
|
#endif |
|
.open = ib_umad_open, |
|
.release = ib_umad_close, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
static int ib_umad_sm_open(struct inode *inode, struct file *filp) |
|
{ |
|
struct ib_umad_port *port; |
|
struct ib_port_modify props = { |
|
.set_port_cap_mask = IB_PORT_SM |
|
}; |
|
int ret; |
|
|
|
port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); |
|
|
|
if (filp->f_flags & O_NONBLOCK) { |
|
if (down_trylock(&port->sm_sem)) { |
|
ret = -EAGAIN; |
|
goto fail; |
|
} |
|
} else { |
|
if (down_interruptible(&port->sm_sem)) { |
|
ret = -ERESTARTSYS; |
|
goto fail; |
|
} |
|
} |
|
|
|
if (!rdma_dev_access_netns(port->ib_dev, current->nsproxy->net_ns)) { |
|
ret = -EPERM; |
|
goto err_up_sem; |
|
} |
|
|
|
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
|
if (ret) |
|
goto err_up_sem; |
|
|
|
filp->private_data = port; |
|
|
|
nonseekable_open(inode, filp); |
|
return 0; |
|
|
|
err_up_sem: |
|
up(&port->sm_sem); |
|
|
|
fail: |
|
return ret; |
|
} |
|
|
|
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 = 0; |
|
|
|
mutex_lock(&port->file_mutex); |
|
if (port->ib_dev) |
|
ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); |
|
mutex_unlock(&port->file_mutex); |
|
|
|
up(&port->sm_sem); |
|
|
|
return ret; |
|
} |
|
|
|
static const struct file_operations umad_sm_fops = { |
|
.owner = THIS_MODULE, |
|
.open = ib_umad_sm_open, |
|
.release = ib_umad_sm_close, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
static struct ib_umad_port *get_port(struct ib_device *ibdev, |
|
struct ib_umad_device *umad_dev, |
|
unsigned int port) |
|
{ |
|
if (!umad_dev) |
|
return ERR_PTR(-EOPNOTSUPP); |
|
if (!rdma_is_port_valid(ibdev, port)) |
|
return ERR_PTR(-EINVAL); |
|
if (!rdma_cap_ib_mad(ibdev, port)) |
|
return ERR_PTR(-EOPNOTSUPP); |
|
|
|
return &umad_dev->ports[port - rdma_start_port(ibdev)]; |
|
} |
|
|
|
static int ib_umad_get_nl_info(struct ib_device *ibdev, void *client_data, |
|
struct ib_client_nl_info *res) |
|
{ |
|
struct ib_umad_port *port = get_port(ibdev, client_data, res->port); |
|
|
|
if (IS_ERR(port)) |
|
return PTR_ERR(port); |
|
|
|
res->abi = IB_USER_MAD_ABI_VERSION; |
|
res->cdev = &port->dev; |
|
return 0; |
|
} |
|
|
|
static struct ib_client umad_client = { |
|
.name = "umad", |
|
.add = ib_umad_add_one, |
|
.remove = ib_umad_remove_one, |
|
.get_nl_info = ib_umad_get_nl_info, |
|
}; |
|
MODULE_ALIAS_RDMA_CLIENT("umad"); |
|
|
|
static int ib_issm_get_nl_info(struct ib_device *ibdev, void *client_data, |
|
struct ib_client_nl_info *res) |
|
{ |
|
struct ib_umad_port *port = get_port(ibdev, client_data, res->port); |
|
|
|
if (IS_ERR(port)) |
|
return PTR_ERR(port); |
|
|
|
res->abi = IB_USER_MAD_ABI_VERSION; |
|
res->cdev = &port->sm_dev; |
|
return 0; |
|
} |
|
|
|
static struct ib_client issm_client = { |
|
.name = "issm", |
|
.get_nl_info = ib_issm_get_nl_info, |
|
}; |
|
MODULE_ALIAS_RDMA_CLIENT("issm"); |
|
|
|
static ssize_t ibdev_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct ib_umad_port *port = dev_get_drvdata(dev); |
|
|
|
if (!port) |
|
return -ENODEV; |
|
|
|
return sysfs_emit(buf, "%s\n", dev_name(&port->ib_dev->dev)); |
|
} |
|
static DEVICE_ATTR_RO(ibdev); |
|
|
|
static ssize_t port_show(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct ib_umad_port *port = dev_get_drvdata(dev); |
|
|
|
if (!port) |
|
return -ENODEV; |
|
|
|
return sysfs_emit(buf, "%d\n", port->port_num); |
|
} |
|
static DEVICE_ATTR_RO(port); |
|
|
|
static struct attribute *umad_class_dev_attrs[] = { |
|
&dev_attr_ibdev.attr, |
|
&dev_attr_port.attr, |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(umad_class_dev); |
|
|
|
static char *umad_devnode(struct device *dev, umode_t *mode) |
|
{ |
|
return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); |
|
} |
|
|
|
static ssize_t abi_version_show(struct class *class, |
|
struct class_attribute *attr, char *buf) |
|
{ |
|
return sysfs_emit(buf, "%d\n", IB_USER_MAD_ABI_VERSION); |
|
} |
|
static CLASS_ATTR_RO(abi_version); |
|
|
|
static struct attribute *umad_class_attrs[] = { |
|
&class_attr_abi_version.attr, |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(umad_class); |
|
|
|
static struct class umad_class = { |
|
.name = "infiniband_mad", |
|
.devnode = umad_devnode, |
|
.class_groups = umad_class_groups, |
|
.dev_groups = umad_class_dev_groups, |
|
}; |
|
|
|
static void ib_umad_release_port(struct device *device) |
|
{ |
|
struct ib_umad_port *port = dev_get_drvdata(device); |
|
struct ib_umad_device *umad_dev = port->umad_dev; |
|
|
|
ib_umad_dev_put(umad_dev); |
|
} |
|
|
|
static void ib_umad_init_port_dev(struct device *dev, |
|
struct ib_umad_port *port, |
|
const struct ib_device *device) |
|
{ |
|
device_initialize(dev); |
|
ib_umad_dev_get(port->umad_dev); |
|
dev->class = &umad_class; |
|
dev->parent = device->dev.parent; |
|
dev_set_drvdata(dev, port); |
|
dev->release = ib_umad_release_port; |
|
} |
|
|
|
static int ib_umad_init_port(struct ib_device *device, int port_num, |
|
struct ib_umad_device *umad_dev, |
|
struct ib_umad_port *port) |
|
{ |
|
int devnum; |
|
dev_t base_umad; |
|
dev_t base_issm; |
|
int ret; |
|
|
|
devnum = ida_alloc_max(&umad_ida, IB_UMAD_MAX_PORTS - 1, GFP_KERNEL); |
|
if (devnum < 0) |
|
return -1; |
|
port->dev_num = devnum; |
|
if (devnum >= IB_UMAD_NUM_FIXED_MINOR) { |
|
base_umad = dynamic_umad_dev + devnum - IB_UMAD_NUM_FIXED_MINOR; |
|
base_issm = dynamic_issm_dev + devnum - IB_UMAD_NUM_FIXED_MINOR; |
|
} else { |
|
base_umad = devnum + base_umad_dev; |
|
base_issm = devnum + base_issm_dev; |
|
} |
|
|
|
port->ib_dev = device; |
|
port->umad_dev = umad_dev; |
|
port->port_num = port_num; |
|
sema_init(&port->sm_sem, 1); |
|
mutex_init(&port->file_mutex); |
|
INIT_LIST_HEAD(&port->file_list); |
|
|
|
ib_umad_init_port_dev(&port->dev, port, device); |
|
port->dev.devt = base_umad; |
|
dev_set_name(&port->dev, "umad%d", port->dev_num); |
|
cdev_init(&port->cdev, &umad_fops); |
|
port->cdev.owner = THIS_MODULE; |
|
|
|
ret = cdev_device_add(&port->cdev, &port->dev); |
|
if (ret) |
|
goto err_cdev; |
|
|
|
ib_umad_init_port_dev(&port->sm_dev, port, device); |
|
port->sm_dev.devt = base_issm; |
|
dev_set_name(&port->sm_dev, "issm%d", port->dev_num); |
|
cdev_init(&port->sm_cdev, &umad_sm_fops); |
|
port->sm_cdev.owner = THIS_MODULE; |
|
|
|
ret = cdev_device_add(&port->sm_cdev, &port->sm_dev); |
|
if (ret) |
|
goto err_dev; |
|
|
|
return 0; |
|
|
|
err_dev: |
|
put_device(&port->sm_dev); |
|
cdev_device_del(&port->cdev, &port->dev); |
|
err_cdev: |
|
put_device(&port->dev); |
|
ida_free(&umad_ida, devnum); |
|
return ret; |
|
} |
|
|
|
static void ib_umad_kill_port(struct ib_umad_port *port) |
|
{ |
|
struct ib_umad_file *file; |
|
int id; |
|
|
|
cdev_device_del(&port->sm_cdev, &port->sm_dev); |
|
cdev_device_del(&port->cdev, &port->dev); |
|
|
|
mutex_lock(&port->file_mutex); |
|
|
|
/* Mark ib_dev NULL and block ioctl or other file ops to progress |
|
* further. |
|
*/ |
|
port->ib_dev = NULL; |
|
|
|
list_for_each_entry(file, &port->file_list, port_list) { |
|
mutex_lock(&file->mutex); |
|
file->agents_dead = 1; |
|
wake_up_interruptible(&file->recv_wait); |
|
mutex_unlock(&file->mutex); |
|
|
|
for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) |
|
if (file->agent[id]) |
|
ib_unregister_mad_agent(file->agent[id]); |
|
} |
|
|
|
mutex_unlock(&port->file_mutex); |
|
|
|
ida_free(&umad_ida, port->dev_num); |
|
|
|
/* balances device_initialize() */ |
|
put_device(&port->sm_dev); |
|
put_device(&port->dev); |
|
} |
|
|
|
static int ib_umad_add_one(struct ib_device *device) |
|
{ |
|
struct ib_umad_device *umad_dev; |
|
int s, e, i; |
|
int count = 0; |
|
int ret; |
|
|
|
s = rdma_start_port(device); |
|
e = rdma_end_port(device); |
|
|
|
umad_dev = kzalloc(struct_size(umad_dev, ports, e - s + 1), GFP_KERNEL); |
|
if (!umad_dev) |
|
return -ENOMEM; |
|
|
|
kref_init(&umad_dev->kref); |
|
for (i = s; i <= e; ++i) { |
|
if (!rdma_cap_ib_mad(device, i)) |
|
continue; |
|
|
|
ret = ib_umad_init_port(device, i, umad_dev, |
|
&umad_dev->ports[i - s]); |
|
if (ret) |
|
goto err; |
|
|
|
count++; |
|
} |
|
|
|
if (!count) { |
|
ret = -EOPNOTSUPP; |
|
goto free; |
|
} |
|
|
|
ib_set_client_data(device, &umad_client, umad_dev); |
|
|
|
return 0; |
|
|
|
err: |
|
while (--i >= s) { |
|
if (!rdma_cap_ib_mad(device, i)) |
|
continue; |
|
|
|
ib_umad_kill_port(&umad_dev->ports[i - s]); |
|
} |
|
free: |
|
/* balances kref_init */ |
|
ib_umad_dev_put(umad_dev); |
|
return ret; |
|
} |
|
|
|
static void ib_umad_remove_one(struct ib_device *device, void *client_data) |
|
{ |
|
struct ib_umad_device *umad_dev = client_data; |
|
unsigned int i; |
|
|
|
rdma_for_each_port (device, i) { |
|
if (rdma_cap_ib_mad(device, i)) |
|
ib_umad_kill_port( |
|
&umad_dev->ports[i - rdma_start_port(device)]); |
|
} |
|
/* balances kref_init() */ |
|
ib_umad_dev_put(umad_dev); |
|
} |
|
|
|
static int __init ib_umad_init(void) |
|
{ |
|
int ret; |
|
|
|
ret = register_chrdev_region(base_umad_dev, |
|
IB_UMAD_NUM_FIXED_MINOR * 2, |
|
umad_class.name); |
|
if (ret) { |
|
pr_err("couldn't register device number\n"); |
|
goto out; |
|
} |
|
|
|
ret = alloc_chrdev_region(&dynamic_umad_dev, 0, |
|
IB_UMAD_NUM_DYNAMIC_MINOR * 2, |
|
umad_class.name); |
|
if (ret) { |
|
pr_err("couldn't register dynamic device number\n"); |
|
goto out_alloc; |
|
} |
|
dynamic_issm_dev = dynamic_umad_dev + IB_UMAD_NUM_DYNAMIC_MINOR; |
|
|
|
ret = class_register(&umad_class); |
|
if (ret) { |
|
pr_err("couldn't create class infiniband_mad\n"); |
|
goto out_chrdev; |
|
} |
|
|
|
ret = ib_register_client(&umad_client); |
|
if (ret) |
|
goto out_class; |
|
|
|
ret = ib_register_client(&issm_client); |
|
if (ret) |
|
goto out_client; |
|
|
|
return 0; |
|
|
|
out_client: |
|
ib_unregister_client(&umad_client); |
|
out_class: |
|
class_unregister(&umad_class); |
|
|
|
out_chrdev: |
|
unregister_chrdev_region(dynamic_umad_dev, |
|
IB_UMAD_NUM_DYNAMIC_MINOR * 2); |
|
|
|
out_alloc: |
|
unregister_chrdev_region(base_umad_dev, |
|
IB_UMAD_NUM_FIXED_MINOR * 2); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
static void __exit ib_umad_cleanup(void) |
|
{ |
|
ib_unregister_client(&issm_client); |
|
ib_unregister_client(&umad_client); |
|
class_unregister(&umad_class); |
|
unregister_chrdev_region(base_umad_dev, |
|
IB_UMAD_NUM_FIXED_MINOR * 2); |
|
unregister_chrdev_region(dynamic_umad_dev, |
|
IB_UMAD_NUM_DYNAMIC_MINOR * 2); |
|
} |
|
|
|
module_init(ib_umad_init); |
|
module_exit(ib_umad_cleanup);
|
|
|