11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2004 Topspin Communications. All rights reserved. 33cd965646b7cb75ae84dd0daf6258adf20e4f169Roland Dreier * Copyright (c) 2005 Voltaire, Inc. All rights reserved. 4cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 52fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier * Copyright (c) 2008 Cisco. All rights reserved. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This software is available to you under a choice of one of two 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * licenses. You may choose to be licensed under the terms of the GNU 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * General Public License (GPL) Version 2, available from the file 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * COPYING in the main directory of this source tree, or the 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OpenIB.org BSD license below: 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * without modification, are permitted provided that the following 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * conditions are met: 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - Redistributions of source code must retain the above 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * copyright notice, this list of conditions and the following 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * disclaimer. 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * - Redistributions in binary form must reproduce the above 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * copyright notice, this list of conditions and the following 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * disclaimer in the documentation and/or other materials 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * provided with the distribution. 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE. 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/err.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/cdev.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/poll.h> 442fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier#include <linux/mutex.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kref.h> 46a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier#include <linux/compat.h> 47a99bbaf5ee6bad1aca0c88ea65ec6e5373e86184Alexey Dobriyan#include <linux/sched.h> 486188e10d38b8d7244ee7776d5f1f88c837b4b93fMatthew Wilcox#include <linux/semaphore.h> 495a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 53a4d61e84804f3b14cc35c5e2af768a07c0f64ef6Roland Dreier#include <rdma/ib_mad.h> 54a4d61e84804f3b14cc35c5e2af768a07c0f64ef6Roland Dreier#include <rdma/ib_user_mad.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("Roland Dreier"); 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("Dual BSD/GPL"); 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum { 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IB_UMAD_MAX_PORTS = 64, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IB_UMAD_MAX_AGENTS = 32, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IB_UMAD_MAJOR = 231, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IB_UMAD_MINOR_BASE = 0 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 68a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier/* 696aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang * Our lifetime rules for these structs are the following: 706aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang * device special file is opened, we take a reference on the 716aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang * ib_umad_port's struct ib_umad_device. We drop these 72a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * references in the corresponding close(). 73a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * 74a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * In addition to references coming from open character devices, there 75a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * is one more reference to each ib_umad_device representing the 76a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * module's reference taken when allocating the ib_umad_device in 77a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * ib_umad_add_one(). 78a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier * 796aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang * When destroying an ib_umad_device, we drop the module's reference. 80a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier */ 81a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct ib_umad_port { 832b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang struct cdev cdev; 84f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *dev; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 862b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang struct cdev sm_cdev; 87f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct device *sm_dev; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct semaphore sm_sem; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 902fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier struct mutex file_mutex; 910c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier struct list_head file_list; 920c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_device *ib_dev; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_device *umad_dev; 95a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier int dev_num; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 port_num; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct ib_umad_device { 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start_port, end_port; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct kref ref; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_port port[0]; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct ib_umad_file { 1062fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier struct mutex mutex; 10794382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier struct ib_umad_port *port; 10894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier struct list_head recv_list; 1092527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct list_head send_list; 11094382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier struct list_head port_list; 1112527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spinlock_t send_lock; 11294382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier wait_queue_head_t recv_wait; 11394382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS]; 11494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier int agents_dead; 1152be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier u8 use_pkey_index; 1162be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier u8 already_used; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct ib_umad_packet { 120cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock struct ib_mad_send_buf *msg; 121f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein struct ib_mad_recv_wc *recv_wc; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head list; 123cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock int length; 124cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock struct ib_user_mad mad; 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 127a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreierstatic struct class *umad_class; 128a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const dev_t base_dev = MKDEV(IB_UMAD_MAJOR, IB_UMAD_MINOR_BASE); 130a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 131a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreierstatic DEFINE_SPINLOCK(port_lock); 1329a4b65e35714516980c863bfb7edc5f232b8b458Hal Rosenstockstatic DECLARE_BITMAP(dev_map, IB_UMAD_MAX_PORTS); 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ib_umad_add_one(struct ib_device *device); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ib_umad_remove_one(struct ib_device *device); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 137a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreierstatic void ib_umad_release_dev(struct kref *ref) 138a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier{ 139a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier struct ib_umad_device *dev = 140a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier container_of(ref, struct ib_umad_device, ref); 141a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 142a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kfree(dev); 143a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier} 144a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 1452be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreierstatic int hdr_size(struct ib_umad_file *file) 1462be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier{ 1472be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier return file->use_pkey_index ? sizeof (struct ib_user_mad_hdr) : 1482be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier sizeof (struct ib_user_mad_hdr_old); 1492be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier} 1502be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 1512fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier/* caller must hold file->mutex */ 15294382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreierstatic struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) 15394382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier{ 15494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier return file->agents_dead ? NULL : file->agent[id]; 15594382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier} 15694382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int queue_packet(struct ib_umad_file *file, 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_mad_agent *agent, 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_packet *packet) 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 1; 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1632fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 16494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 165cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock for (packet->mad.hdr.id = 0; 166cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; 167cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock packet->mad.hdr.id++) 16894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier if (agent == __get_agent(file, packet->mad.hdr.id)) { 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&packet->list, &file->recv_list); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&file->recv_wait); 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1752fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1802527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Heftystatic void dequeue_send(struct ib_umad_file *file, 1812527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct ib_umad_packet *packet) 1822fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier{ 1832527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spin_lock_irq(&file->send_lock); 1842527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty list_del(&packet->list); 1852527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spin_unlock_irq(&file->send_lock); 1862fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier} 1872527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void send_handler(struct ib_mad_agent *agent, 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_mad_send_wc *send_wc) 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = agent->context; 19234816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty struct ib_umad_packet *packet = send_wc->send_buf->context[0]; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1942527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty dequeue_send(file, packet); 19534816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty ib_destroy_ah(packet->msg->ah); 196cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ib_free_send_mad(packet->msg); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { 199f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet->length = IB_MGMT_MAD_HDR; 200f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet->mad.hdr.status = ETIMEDOUT; 201f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (!queue_packet(file, agent, packet)) 202f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return; 203cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock } 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(packet); 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void recv_handler(struct ib_mad_agent *agent, 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_mad_recv_wc *mad_recv_wc) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = agent->context; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_packet *packet; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mad_recv_wc->wc->status != IB_WC_SUCCESS) 214f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein goto err1; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 216f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet = kzalloc(sizeof *packet, GFP_KERNEL); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!packet) 218f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein goto err1; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 220f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet->length = mad_recv_wc->mad_len; 221f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet->recv_wc = mad_recv_wc; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2232be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.status = 0; 2242be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.length = hdr_size(file) + mad_recv_wc->mad_len; 2252be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.qpn = cpu_to_be32(mad_recv_wc->wc->src_qp); 2262be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.lid = cpu_to_be16(mad_recv_wc->wc->slid); 2272be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.sl = mad_recv_wc->wc->sl; 2282be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.path_bits = mad_recv_wc->wc->dlid_path_bits; 2292be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; 230cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock packet->mad.hdr.grh_present = !!(mad_recv_wc->wc->wc_flags & IB_WC_GRH); 231cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock if (packet->mad.hdr.grh_present) { 232aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty struct ib_ah_attr ah_attr; 233aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty 234aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty ib_init_ah_from_wc(agent->device, agent->port_num, 235aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, 236aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty &ah_attr); 237aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty 238aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty packet->mad.hdr.gid_index = ah_attr.grh.sgid_index; 239aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty packet->mad.hdr.hop_limit = ah_attr.grh.hop_limit; 240aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty packet->mad.hdr.traffic_class = ah_attr.grh.traffic_class; 241aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty memcpy(packet->mad.hdr.gid, &ah_attr.grh.dgid, 16); 242aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty packet->mad.hdr.flow_label = cpu_to_be32(ah_attr.grh.flow_label); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (queue_packet(file, agent, packet)) 246f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein goto err2; 247f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return; 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 249f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgensteinerr2: 250f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein kfree(packet); 251f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgensteinerr1: 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ib_free_recv_mad(mad_recv_wc); 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2552be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreierstatic ssize_t copy_recv_mad(struct ib_umad_file *file, char __user *buf, 2562be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier struct ib_umad_packet *packet, size_t count) 257f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein{ 258f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein struct ib_mad_recv_buf *recv_buf; 259f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein int left, seg_payload, offset, max_seg_payload; 260f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 261f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* We need enough room to copy the first (or only) MAD segment. */ 262f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein recv_buf = &packet->recv_wc->recv_buf; 263f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if ((packet->length <= sizeof (*recv_buf->mad) && 2642be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier count < hdr_size(file) + packet->length) || 265f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein (packet->length > sizeof (*recv_buf->mad) && 2662be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier count < hdr_size(file) + sizeof (*recv_buf->mad))) 267f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EINVAL; 268f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 2692be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (copy_to_user(buf, &packet->mad, hdr_size(file))) 270f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 271f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 2722be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier buf += hdr_size(file); 273f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein seg_payload = min_t(int, packet->length, sizeof (*recv_buf->mad)); 274f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (copy_to_user(buf, recv_buf->mad, seg_payload)) 275f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 276f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 277f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (seg_payload < packet->length) { 278f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* 279f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein * Multipacket RMPP MAD message. Copy remainder of message. 280f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein * Note that last segment may have a shorter payload. 281f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein */ 2822be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (count < hdr_size(file) + packet->length) { 283f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* 284f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein * The buffer is too small, return the first RMPP segment, 285f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein * which includes the RMPP message length. 286f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein */ 287f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -ENOSPC; 288f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 289618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock offset = ib_get_mad_data_offset(recv_buf->mad->mad_hdr.mgmt_class); 290f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein max_seg_payload = sizeof (struct ib_mad) - offset; 291f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 292f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein for (left = packet->length - seg_payload, buf += seg_payload; 293f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein left; left -= seg_payload, buf += seg_payload) { 294f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein recv_buf = container_of(recv_buf->list.next, 295f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein struct ib_mad_recv_buf, list); 296f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein seg_payload = min(left, max_seg_payload); 297f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (copy_to_user(buf, ((void *) recv_buf->mad) + offset, 298f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein seg_payload)) 299f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 300f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 301f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 3022be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier return hdr_size(file) + packet->length; 303f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein} 304f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 3052be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreierstatic ssize_t copy_send_mad(struct ib_umad_file *file, char __user *buf, 3062be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier struct ib_umad_packet *packet, size_t count) 307f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein{ 3082be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier ssize_t size = hdr_size(file) + packet->length; 309f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 310f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (count < size) 311f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EINVAL; 312f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 3132be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (copy_to_user(buf, &packet->mad, hdr_size(file))) 3142be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier return -EFAULT; 3152be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 3162be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier buf += hdr_size(file); 3172be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 3182be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (copy_to_user(buf, packet->mad.data, packet->length)) 319f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 320f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 321f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return size; 322f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein} 323f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t ib_umad_read(struct file *filp, char __user *buf, 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t count, loff_t *pos) 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = filp->private_data; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_packet *packet; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t ret; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3312be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (count < hdr_size(file)) 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3342fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (list_empty(&file->recv_list)) { 3372fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (filp->f_flags & O_NONBLOCK) 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EAGAIN; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wait_event_interruptible(file->recv_wait, 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !list_empty(&file->recv_list))) 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ERESTARTSYS; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3462fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&packet->list); 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3522fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 354f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (packet->recv_wc) 3552be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier ret = copy_recv_mad(file, buf, packet, count); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3572be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier ret = copy_send_mad(file, buf, packet, count); 358f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 359cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock if (ret < 0) { 360cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock /* Requeue packet */ 3612fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 362cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock list_add(&packet->list, &file->recv_list); 3632fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 364f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } else { 365f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (packet->recv_wc) 366f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein ib_free_recv_mad(packet->recv_wc); 367cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock kfree(packet); 368f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 372f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgensteinstatic int copy_rmpp_mad(struct ib_mad_send_buf *msg, const char __user *buf) 373f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein{ 374f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein int left, seg; 375f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 376f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* Copy class specific header */ 377f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if ((msg->hdr_len > IB_MGMT_RMPP_HDR) && 378f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein copy_from_user(msg->mad + IB_MGMT_RMPP_HDR, buf + IB_MGMT_RMPP_HDR, 379f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein msg->hdr_len - IB_MGMT_RMPP_HDR)) 380f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 381f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 382f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* All headers are in place. Copy data segments. */ 383f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein for (seg = 1, left = msg->data_len, buf += msg->hdr_len; left > 0; 384f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein seg++, left -= msg->seg_size, buf += msg->seg_size) { 385f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (copy_from_user(ib_get_rmpp_segment(msg, seg), buf, 386f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein min(left, msg->seg_size))) 387f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return -EFAULT; 388f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 389f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein return 0; 390f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein} 391f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 3922527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Heftystatic int same_destination(struct ib_user_mad_hdr *hdr1, 3932527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct ib_user_mad_hdr *hdr2) 3942527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty{ 3952527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (!hdr1->grh_present && !hdr2->grh_present) 3962527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return (hdr1->lid == hdr2->lid); 3972527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 3982527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (hdr1->grh_present && hdr2->grh_present) 3992527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return !memcmp(hdr1->gid, hdr2->gid, 16); 4002527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4012527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return 0; 4022527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty} 4032527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4042527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Heftystatic int is_duplicate(struct ib_umad_file *file, 4052527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct ib_umad_packet *packet) 4062527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty{ 4072527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct ib_umad_packet *sent_packet; 4082527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty struct ib_mad_hdr *sent_hdr, *hdr; 4092527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4102527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty hdr = (struct ib_mad_hdr *) packet->mad.data; 4112527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty list_for_each_entry(sent_packet, &file->send_list, list) { 4122527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty sent_hdr = (struct ib_mad_hdr *) sent_packet->mad.data; 4132527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4142527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if ((hdr->tid != sent_hdr->tid) || 4152527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty (hdr->mgmt_class != sent_hdr->mgmt_class)) 4162527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty continue; 4172527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4182527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty /* 4192527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * No need to be overly clever here. If two new operations have 4202527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * the same TID, reject the second as a duplicate. This is more 4212527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * restrictive than required by the spec. 4222527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty */ 4232527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (!ib_response_mad((struct ib_mad *) hdr)) { 4242527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (!ib_response_mad((struct ib_mad *) sent_hdr)) 4252527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return 1; 4262527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty continue; 4272527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty } else if (!ib_response_mad((struct ib_mad *) sent_hdr)) 4282527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty continue; 4292527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4302527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (same_destination(&packet->mad.hdr, &sent_packet->mad.hdr)) 4312527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return 1; 4322527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty } 4332527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4342527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty return 0; 4352527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty} 4362527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t ib_umad_write(struct file *filp, const char __user *buf, 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t count, loff_t *pos) 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = filp->private_data; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_packet *packet; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_mad_agent *agent; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_ah_attr ah_attr; 44434816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty struct ib_ah *ah; 445cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock struct ib_rmpp_mad *rmpp_mad; 44697f52eb438be7caebe026421545619d8a0c1398aSean Hefty __be64 *tid; 447f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein int ret, data_len, hdr_len, copy_offset, rmpp_active; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4492be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (count < hdr_size(file) + IB_MGMT_RMPP_HDR) 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 452f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein packet = kzalloc(sizeof *packet + IB_MGMT_RMPP_HDR, GFP_KERNEL); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!packet) 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4562be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (copy_from_user(&packet->mad, buf, hdr_size(file))) { 457cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ret = -EFAULT; 458cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock goto err; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461caf6e3f221ddc12ccabd1cd0ba149561db0090d4Hefty, Sean if (packet->mad.hdr.id >= IB_UMAD_MAX_AGENTS) { 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EINVAL; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4662be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier buf += hdr_size(file); 4672be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 4682be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (copy_from_user(packet->mad.data, buf, IB_MGMT_RMPP_HDR)) { 4692be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier ret = -EFAULT; 4702be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier goto err; 4712be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier } 4722be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 4732fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 47594382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier agent = __get_agent(file, packet->mad.hdr.id); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!agent) { 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EINVAL; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_up; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(&ah_attr, 0, sizeof ah_attr); 482cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ah_attr.dlid = be16_to_cpu(packet->mad.hdr.lid); 483cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ah_attr.sl = packet->mad.hdr.sl; 484cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ah_attr.src_path_bits = packet->mad.hdr.path_bits; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ah_attr.port_num = file->port->port_num; 486cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock if (packet->mad.hdr.grh_present) { 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ah_attr.ah_flags = IB_AH_GRH; 488cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock memcpy(ah_attr.grh.dgid.raw, packet->mad.hdr.gid, 16); 489aeba84a9251968a51fc6faae846518aac4e77565Sean Hefty ah_attr.grh.sgid_index = packet->mad.hdr.gid_index; 490d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang ah_attr.grh.flow_label = be32_to_cpu(packet->mad.hdr.flow_label); 491d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang ah_attr.grh.hop_limit = packet->mad.hdr.hop_limit; 492cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ah_attr.grh.traffic_class = packet->mad.hdr.traffic_class; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 49534816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty ah = ib_create_ah(agent->qp->pd, &ah_attr); 49634816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty if (IS_ERR(ah)) { 49734816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty ret = PTR_ERR(ah); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_up; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock rmpp_mad = (struct ib_rmpp_mad *) packet->mad.data; 502618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock hdr_len = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); 503618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock if (!ib_is_mad_class_rmpp(rmpp_mad->mad_hdr.mgmt_class)) { 504618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock copy_offset = IB_MGMT_MAD_HDR; 505618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock rmpp_active = 0; 506618a3c03fcfdf1ac4543247c8ddfb0c9d775ff33Hal Rosenstock } else { 507f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein copy_offset = IB_MGMT_RMPP_HDR; 508f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein rmpp_active = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & 509f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein IB_MGMT_RMPP_FLAG_ACTIVE; 510cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock } 511cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock 5122be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier data_len = count - hdr_size(file) - hdr_len; 513cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock packet->msg = ib_create_send_mad(agent, 514cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock be32_to_cpu(packet->mad.hdr.qpn), 5152be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier packet->mad.hdr.pkey_index, rmpp_active, 5162be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier hdr_len, data_len, GFP_KERNEL); 517cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock if (IS_ERR(packet->msg)) { 518cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ret = PTR_ERR(packet->msg); 519cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock goto err_ah; 520cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock } 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 522d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang packet->msg->ah = ah; 52334816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty packet->msg->timeout_ms = packet->mad.hdr.timeout_ms; 524d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang packet->msg->retries = packet->mad.hdr.retries; 52534816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty packet->msg->context[0] = packet; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 527f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein /* Copy MAD header. Any RMPP header is already in place. */ 528cb0f0910f4b41772a6771bdb4fb2d419b27bcd77Sean Hefty memcpy(packet->msg->mad, packet->mad.data, IB_MGMT_MAD_HDR); 529f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein 530f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (!rmpp_active) { 531f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (copy_from_user(packet->msg->mad + copy_offset, 532f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein buf + copy_offset, 533f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein hdr_len + data_len - copy_offset)) { 534f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein ret = -EFAULT; 535f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein goto err_msg; 536f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 537f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } else { 538f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein ret = copy_rmpp_mad(packet->msg, buf); 539f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (ret) 540f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein goto err_msg; 541cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock } 542cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock 543cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock /* 5442527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * Set the high-order part of the transaction ID to make MADs from 5452527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * different agents unique, and allow routing responses back to the 5462527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty * original requestor. 547cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock */ 5482527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (!ib_response_mad(packet->msg->mad)) { 549089a1bedd84be16a4f49a319e7ccb4a128da5ce9Roland Dreier tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid; 550cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock *tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | 551cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock (be64_to_cpup(tid) & 0xffffffff)); 5522527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty rmpp_mad->mad_hdr.tid = *tid; 5532527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty } 5542527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty 5552527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spin_lock_irq(&file->send_lock); 5562527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty ret = is_duplicate(file, packet); 5572527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (!ret) 5582527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty list_add_tail(&packet->list, &file->send_list); 5592527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spin_unlock_irq(&file->send_lock); 5602527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty if (ret) { 5612527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty ret = -EINVAL; 5622527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty goto err_msg; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 56534816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty ret = ib_post_send_mad(packet->msg, NULL); 566cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock if (ret) 5672527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty goto err_send; 568cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock 5692fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 570cb0f0910f4b41772a6771bdb4fb2d419b27bcd77Sean Hefty return count; 571cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock 5722527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Heftyerr_send: 5732527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty dequeue_send(file, packet); 574cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstockerr_msg: 575cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ib_free_send_mad(packet->msg); 576cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstockerr_ah: 57734816ad98efe4d47ffd858a0345321f9d85d9420Sean Hefty ib_destroy_ah(ah); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_up: 5792fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(packet); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int ib_umad_poll(struct file *filp, struct poll_table_struct *wait) 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = filp->private_data; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* we will always be able to post a MAD send */ 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int mask = POLLOUT | POLLWRNORM; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds poll_wait(filp, &file->recv_wait, wait); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!list_empty(&file->recv_list)) 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask |= POLLIN | POLLRDNORM; 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mask; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 600a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreierstatic int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg, 601a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier int compat_method_mask) 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_user_mad_reg_req ureq; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_mad_reg_req req; 6052fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier struct ib_mad_agent *agent = NULL; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int agent_id; 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6092fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->port->file_mutex); 6102fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 6110c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 6120c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier if (!file->port->ib_dev) { 6130c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier ret = -EPIPE; 6140c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier goto out; 6150c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier } 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 617a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier if (copy_from_user(&ureq, arg, sizeof ureq)) { 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EFAULT; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ureq.qpn != 0 && ureq.qpn != 1) { 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EINVAL; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id) 62894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier if (!__get_agent(file, agent_id)) 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto found; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -ENOMEM; 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfound: 6350df3bb131f789f5929f7a239869e9945e4a5a734Roland Dreier if (ureq.mgmt_class) { 6360df3bb131f789f5929f7a239869e9945e4a5a734Roland Dreier req.mgmt_class = ureq.mgmt_class; 6370df3bb131f789f5929f7a239869e9945e4a5a734Roland Dreier req.mgmt_class_version = ureq.mgmt_class_version; 638a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier memcpy(req.oui, ureq.oui, sizeof req.oui); 639a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier 640a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier if (compat_method_mask) { 641a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier u32 *umm = (u32 *) ureq.method_mask; 642a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier int i; 643a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier 644a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier for (i = 0; i < BITS_TO_LONGS(IB_MGMT_MAX_METHODS); ++i) 645a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier req.method_mask[i] = 646a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier umm[i * 2] | ((u64) umm[i * 2 + 1] << 32); 647a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier } else 648a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier memcpy(req.method_mask, ureq.method_mask, 649a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier sizeof req.method_mask); 6500df3bb131f789f5929f7a239869e9945e4a5a734Roland Dreier } 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num, 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI, 6540df3bb131f789f5929f7a239869e9945e4a5a734Roland Dreier ureq.mgmt_class ? &req : NULL, 655cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock ureq.rmpp_version, 656cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock send_handler, recv_handler, file); 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(agent)) { 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = PTR_ERR(agent); 6592fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier agent = NULL; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (put_user(agent_id, 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) { 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EFAULT; 666ec914c52d6208d8752dfd85b48a9aff304911434Roland Dreier goto out; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6692be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (!file->already_used) { 6702be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier file->already_used = 1; 6712be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (!file->use_pkey_index) { 6722be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier printk(KERN_WARNING "user_mad: process %s did not enable " 6732be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier "P_Key index support.\n", current->comm); 6742be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier printk(KERN_WARNING "user_mad: Documentation/infiniband/user_mad.txt " 6752be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier "has info on the new ABI.\n"); 6762be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier } 6772be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier } 6782be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 6792f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier file->agent[agent_id] = agent; 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 6812f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 6832fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 6842fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier 6852fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier if (ret && agent) 6862fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier ib_unregister_mad_agent(agent); 6872fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier 6882fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->port->file_mutex); 6892fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 693a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreierstatic int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg) 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6952f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier struct ib_mad_agent *agent = NULL; 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 id; 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = 0; 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 699a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier if (get_user(id, arg)) 7002f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier return -EFAULT; 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7022fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->port->file_mutex); 7032fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 705caf6e3f221ddc12ccabd1cd0ba149561db0090d4Hefty, Sean if (id >= IB_UMAD_MAX_AGENTS || !__get_agent(file, id)) { 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EINVAL; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7102f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier agent = file->agent[id]; 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file->agent[id] = NULL; 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 7142fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 7152f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier 716ec914c52d6208d8752dfd85b48a9aff304911434Roland Dreier if (agent) 7172f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier ib_unregister_mad_agent(agent); 7182f76e82947b977a1008cfd2868351a701c93c69cRoland Dreier 7192fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->port->file_mutex); 7202fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7242be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreierstatic long ib_umad_enable_pkey(struct ib_umad_file *file) 7252be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier{ 7262be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier int ret = 0; 7272be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 7282fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 7292be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier if (file->already_used) 7302be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier ret = -EINVAL; 7312be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier else 7322be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier file->use_pkey_index = 1; 7332fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 7342be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 7352be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier return ret; 7362be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier} 7372be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier 738cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstockstatic long ib_umad_ioctl(struct file *filp, unsigned int cmd, 739cb183a06b381652b7637fedfa7ef85ec0baf2a1fHal Rosenstock unsigned long arg) 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cmd) { 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case IB_USER_MAD_REGISTER_AGENT: 743a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return ib_umad_reg_agent(filp->private_data, (void __user *) arg, 0); 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case IB_USER_MAD_UNREGISTER_AGENT: 745a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg); 7462be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier case IB_USER_MAD_ENABLE_PKEY: 7472be8e3ee8efd6f99ce454115c29d09750915021aRoland Dreier return ib_umad_enable_pkey(filp->private_data); 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOIOCTLCMD; 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 753a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier#ifdef CONFIG_COMPAT 754a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreierstatic long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd, 755a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier unsigned long arg) 756a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier{ 757a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier switch (cmd) { 758a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier case IB_USER_MAD_REGISTER_AGENT: 759a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return ib_umad_reg_agent(filp->private_data, compat_ptr(arg), 1); 760a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier case IB_USER_MAD_UNREGISTER_AGENT: 761a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg)); 762a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier case IB_USER_MAD_ENABLE_PKEY: 763a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return ib_umad_enable_pkey(filp->private_data); 764a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier default: 765a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier return -ENOIOCTLCMD; 766a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier } 767a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier} 768a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier#endif 769a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier 770feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier/* 771feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * ib_umad_open() does not need the BKL: 772feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * 7736aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang * - the ib_umad_port structures are properly reference counted, and 774feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * everything else is purely local to the file being created, so 775feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * races against other open calls are not a problem; 776feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * - the ioctl method does not affect any global state outside of the 777feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier * file structure being operated on; 778feae1ef116ed381625d3731c5ae4f4ebcb3fa302Roland Dreier */ 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ib_umad_open(struct inode *inode, struct file *filp) 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 781a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier struct ib_umad_port *port; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file; 783bc1db9af731a74c7eca04df5936214c800774113Roland Dreier int ret; 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7856aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang port = container_of(inode->i_cdev, struct ib_umad_port, cdev); 786a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (port) 787a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_get(&port->umad_dev->ref); 7886aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang else 789a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier return -ENXIO; 790a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 7912fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&port->file_mutex); 7920c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 7930c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier if (!port->ib_dev) { 7940c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier ret = -ENXIO; 7950c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier goto out; 7960c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier } 7970c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 798cb0f0910f4b41772a6771bdb4fb2d419b27bcd77Sean Hefty file = kzalloc(sizeof *file, GFP_KERNEL); 799a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (!file) { 800a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_put(&port->umad_dev->ref, ib_umad_release_dev); 8010c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier ret = -ENOMEM; 8020c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier goto out; 803a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier } 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8052fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_init(&file->mutex); 8062527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty spin_lock_init(&file->send_lock); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&file->recv_list); 8082527e681fd4fd4231c2e04f09d7b04d3cab8eefeSean Hefty INIT_LIST_HEAD(&file->send_list); 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&file->recv_wait); 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file->port = port; 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp->private_data = file; 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8140c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier list_add_tail(&file->port_list, &port->file_list); 8150c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 816bc1db9af731a74c7eca04df5936214c800774113Roland Dreier ret = nonseekable_open(inode, filp); 817bc1db9af731a74c7eca04df5936214c800774113Roland Dreier 8180c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreierout: 8192fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&port->file_mutex); 8200c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier return ret; 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ib_umad_close(struct inode *inode, struct file *filp) 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_file *file = filp->private_data; 826a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier struct ib_umad_device *dev = file->port->umad_dev; 827561e148ea972a6e8d2c8f7aecc658b3a64f7a6deRoland Dreier struct ib_umad_packet *packet, *tmp; 82894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier int already_dead; 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8312fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->port->file_mutex); 8322fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 83394382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 83494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier already_dead = file->agents_dead; 83594382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier file->agents_dead = 1; 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 837f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein list_for_each_entry_safe(packet, tmp, &file->recv_list, list) { 838f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein if (packet->recv_wc) 839f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein ib_free_recv_mad(packet->recv_wc); 840561e148ea972a6e8d2c8f7aecc658b3a64f7a6deRoland Dreier kfree(packet); 841f36e1793e25513380cae5958a9164d4cc4458ad0Jack Morgenstein } 842561e148ea972a6e8d2c8f7aecc658b3a64f7a6deRoland Dreier 8430c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier list_del(&file->port_list); 8440c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 8452fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 84694382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 84794382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier if (!already_dead) 84894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i) 84994382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier if (file->agent[i]) 85094382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier ib_unregister_mad_agent(file->agent[i]); 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8522fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->port->file_mutex); 85394382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 85494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier kfree(file); 855a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_put(&dev->ref, ib_umad_release_dev); 856a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8602b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations umad_fops = { 861d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .owner = THIS_MODULE, 862d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .read = ib_umad_read, 863d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .write = ib_umad_write, 864d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .poll = ib_umad_poll, 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unlocked_ioctl = ib_umad_ioctl, 866a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier#ifdef CONFIG_COMPAT 867d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .compat_ioctl = ib_umad_compat_ioctl, 868a394f83bdfec10b09d8cb111e622556b2e6fd0deRoland Dreier#endif 869d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .open = ib_umad_open, 870bc1db9af731a74c7eca04df5936214c800774113Roland Dreier .release = ib_umad_close, 871bc1db9af731a74c7eca04df5936214c800774113Roland Dreier .llseek = no_llseek, 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ib_umad_sm_open(struct inode *inode, struct file *filp) 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 876a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier struct ib_umad_port *port; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_port_modify props = { 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .set_port_cap_mask = IB_PORT_SM 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8826aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang port = container_of(inode->i_cdev, struct ib_umad_port, sm_cdev); 883a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (port) 884a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_get(&port->umad_dev->ref); 8856aa2a86ec430fb1ae739bd065d7ea6596997a2cfAlexander Chiang else 886a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier return -ENXIO; 887a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (filp->f_flags & O_NONBLOCK) { 889a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (down_trylock(&port->sm_sem)) { 890a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier ret = -EAGAIN; 891a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier goto fail; 892a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier } 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 894a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (down_interruptible(&port->sm_sem)) { 895a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier ret = -ERESTARTSYS; 896a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier goto fail; 897a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier } 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&port->sm_sem); 903a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier goto fail; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp->private_data = port; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 908bc1db9af731a74c7eca04df5936214c800774113Roland Dreier return nonseekable_open(inode, filp); 909a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 910a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreierfail: 911a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_put(&port->umad_dev->ref, ib_umad_release_dev); 912a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier return ret; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ib_umad_sm_close(struct inode *inode, struct file *filp) 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_port *port = filp->private_data; 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_port_modify props = { 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .clr_port_cap_mask = IB_PORT_SM 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 9210c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier int ret = 0; 9220c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 9232fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&port->file_mutex); 9240c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier if (port->ib_dev) 9250c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier ret = ib_modify_port(port->ib_dev, port->port_num, 0, &props); 9262fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&port->file_mutex); 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&port->sm_sem); 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 930a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier kref_put(&port->umad_dev->ref, ib_umad_release_dev); 931a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9352b8693c0617e972fc0b2fd1ebf8de97e15b656c3Arjan van de Venstatic const struct file_operations umad_sm_fops = { 936d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .owner = THIS_MODULE, 937d3f2c67f2d10675f45b0d9257269420e9f59aa1aAlexander Chiang .open = ib_umad_sm_open, 938bc1db9af731a74c7eca04df5936214c800774113Roland Dreier .release = ib_umad_sm_close, 939bc1db9af731a74c7eca04df5936214c800774113Roland Dreier .llseek = no_llseek, 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct ib_client umad_client = { 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "umad", 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .add = ib_umad_add_one, 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remove = ib_umad_remove_one 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 948f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 949f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones char *buf) 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 951f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct ib_umad_port *port = dev_get_drvdata(dev); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 953a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (!port) 954a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier return -ENODEV; 955a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sprintf(buf, "%s\n", port->ib_dev->name); 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 958f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 960f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic ssize_t show_port(struct device *dev, struct device_attribute *attr, 961f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones char *buf) 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 963f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones struct ib_umad_port *port = dev_get_drvdata(dev); 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 965a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (!port) 966a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier return -ENODEV; 967a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sprintf(buf, "%d\n", port->port_num); 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 970f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jonesstatic DEVICE_ATTR(port, S_IRUGO, show_port, NULL); 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9720933e2d98d1b170ef62d48e18157f5dc43b58217Andi Kleenstatic CLASS_ATTR_STRING(abi_version, S_IRUGO, 9730933e2d98d1b170ef62d48e18157f5dc43b58217Andi Kleen __stringify(IB_USER_MAD_ABI_VERSION)); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9758698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiangstatic dev_t overflow_maj; 9768698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiangstatic DECLARE_BITMAP(overflow_map, IB_UMAD_MAX_PORTS); 9778698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiangstatic int find_overflow_devnum(void) 9788698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang{ 9798698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang int ret; 9808698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang 9818698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (!overflow_maj) { 9828698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang ret = alloc_chrdev_region(&overflow_maj, 0, IB_UMAD_MAX_PORTS * 2, 9838698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang "infiniband_mad"); 9848698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (ret) { 9858698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang printk(KERN_ERR "user_mad: couldn't register dynamic device number\n"); 9868698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang return ret; 9878698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang } 9888698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang } 9898698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang 9908698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang ret = find_first_zero_bit(overflow_map, IB_UMAD_MAX_PORTS); 9918698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (ret >= IB_UMAD_MAX_PORTS) 9928698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang return -1; 9938698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang 9948698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang return ret; 9958698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang} 9968698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ib_umad_init_port(struct ib_device *device, int port_num, 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_port *port) 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1000d451b8df9f7e572ea77f976745f424dd1dae8aebAlexander Chiang int devnum; 1001dc2ed5e3c963490a4fe934b482537d1274961ecbAlexander Chiang dev_t base; 1002d451b8df9f7e572ea77f976745f424dd1dae8aebAlexander Chiang 1003a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier spin_lock(&port_lock); 1004d451b8df9f7e572ea77f976745f424dd1dae8aebAlexander Chiang devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS); 1005d451b8df9f7e572ea77f976745f424dd1dae8aebAlexander Chiang if (devnum >= IB_UMAD_MAX_PORTS) { 1006a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier spin_unlock(&port_lock); 10078698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang devnum = find_overflow_devnum(); 10088698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (devnum < 0) 10098698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang return -1; 10108698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang 10118698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang spin_lock(&port_lock); 10128698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang port->dev_num = devnum + IB_UMAD_MAX_PORTS; 10138698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang base = devnum + overflow_maj; 10148698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang set_bit(devnum, overflow_map); 10158698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang } else { 10168698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang port->dev_num = devnum; 10178698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang base = devnum + base_dev; 10188698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang set_bit(devnum, dev_map); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1020a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier spin_unlock(&port_lock); 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->ib_dev = device; 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->port_num = port_num; 1024557d0540b96176dc42943e84c88c288f523388caThomas Gleixner sema_init(&port->sm_sem, 1); 10252fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_init(&port->file_mutex); 10260c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier INIT_LIST_HEAD(&port->file_list); 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10282b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_init(&port->cdev, &umad_fops); 10292b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang port->cdev.owner = THIS_MODULE; 10302b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num); 1031dc2ed5e3c963490a4fe934b482537d1274961ecbAlexander Chiang if (cdev_add(&port->cdev, base, 1)) 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_cdev; 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 103491bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman port->dev = device_create(umad_class, device->dma_device, 10352b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang port->cdev.dev, port, 103691bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman "umad%d", port->dev_num); 1037f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (IS_ERR(port->dev)) 1038a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier goto err_cdev; 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1040f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (device_create_file(port->dev, &dev_attr_ibdev)) 1041f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones goto err_dev; 1042f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (device_create_file(port->dev, &dev_attr_port)) 1043f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones goto err_dev; 1044f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones 1045dc2ed5e3c963490a4fe934b482537d1274961ecbAlexander Chiang base += IB_UMAD_MAX_PORTS; 10462b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_init(&port->sm_cdev, &umad_sm_fops); 10472b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang port->sm_cdev.owner = THIS_MODULE; 10482b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num); 1049dc2ed5e3c963490a4fe934b482537d1274961ecbAlexander Chiang if (cdev_add(&port->sm_cdev, base, 1)) 1050a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier goto err_sm_cdev; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 105291bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman port->sm_dev = device_create(umad_class, device->dma_device, 10532b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang port->sm_cdev.dev, port, 105491bd418fdc8526ee70a0e8f7970b584c8870ae10Greg Kroah-Hartman "issm%d", port->dev_num); 1055f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (IS_ERR(port->sm_dev)) 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err_sm_cdev; 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1058f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (device_create_file(port->sm_dev, &dev_attr_ibdev)) 1059f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones goto err_sm_dev; 1060f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones if (device_create_file(port->sm_dev, &dev_attr_port)) 1061f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones goto err_sm_dev; 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1065f4e91eb4a81559da87a3843758a641b5cc590b65Tony Joneserr_sm_dev: 10662b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang device_destroy(umad_class, port->sm_cdev.dev); 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_sm_cdev: 10692b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_del(&port->sm_cdev); 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071f4e91eb4a81559da87a3843758a641b5cc590b65Tony Joneserr_dev: 10722b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang device_destroy(umad_class, port->cdev.dev); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr_cdev: 10752b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_del(&port->cdev); 10768698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (port->dev_num < IB_UMAD_MAX_PORTS) 10778698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang clear_bit(devnum, dev_map); 10788698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang else 10798698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang clear_bit(devnum, overflow_map); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1084a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreierstatic void ib_umad_kill_port(struct ib_umad_port *port) 1085a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier{ 10860c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier struct ib_umad_file *file; 10870c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier int id; 10880c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 1089f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones dev_set_drvdata(port->dev, NULL); 1090f4e91eb4a81559da87a3843758a641b5cc590b65Tony Jones dev_set_drvdata(port->sm_dev, NULL); 1091a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 10922b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang device_destroy(umad_class, port->cdev.dev); 10932b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang device_destroy(umad_class, port->sm_cdev.dev); 1094a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 10952b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_del(&port->cdev); 10962b937afcab34e4f739e2f7cd6062870fbe6b2ccfAlexander Chiang cdev_del(&port->sm_cdev); 1097a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 10982fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&port->file_mutex); 10990c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 11000c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier port->ib_dev = NULL; 11010c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 11022fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier list_for_each_entry(file, &port->file_list, port_list) { 11032fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_lock(&file->mutex); 110494382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier file->agents_dead = 1; 11052fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&file->mutex); 110694382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier 110794382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) 110894382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier if (file->agent[id]) 110994382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier ib_unregister_mad_agent(file->agent[id]); 111094382f3562e350ed7c8f7dcd6fc968bdece31328Roland Dreier } 11110c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 11122fe7e6f7c9f55eac24c5b3cdf56af29ab9b0ca81Roland Dreier mutex_unlock(&port->file_mutex); 11130c99cb6d5fe77872c5a32cff837c05f70158ce15Roland Dreier 11148698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (port->dev_num < IB_UMAD_MAX_PORTS) 11158698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang clear_bit(port->dev_num, dev_map); 11168698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang else 11178698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang clear_bit(port->dev_num - IB_UMAD_MAX_PORTS, overflow_map); 1118a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier} 1119a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ib_umad_add_one(struct ib_device *device) 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_device *umad_dev; 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int s, e, i; 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 112507ebafbaaa72aa6a35472879008f5a1d1d469a0cTom Tucker if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 112607ebafbaaa72aa6a35472879008f5a1d1d469a0cTom Tucker return; 112707ebafbaaa72aa6a35472879008f5a1d1d469a0cTom Tucker 112807ebafbaaa72aa6a35472879008f5a1d1d469a0cTom Tucker if (device->node_type == RDMA_NODE_IB_SWITCH) 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = e = 0; 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = 1; 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds e = device->phys_port_cnt; 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1135cb0f0910f4b41772a6771bdb4fb2d419b27bcd77Sean Hefty umad_dev = kzalloc(sizeof *umad_dev + 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (e - s + 1) * sizeof (struct ib_umad_port), 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GFP_KERNEL); 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!umad_dev) 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kref_init(&umad_dev->ref); 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds umad_dev->start_port = s; 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds umad_dev->end_port = e; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = s; i <= e; ++i) { 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds umad_dev->port[i - s].umad_dev = umad_dev; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ib_umad_init_port(device, i, &umad_dev->port[i - s])) 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err; 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ib_set_client_data(device, &umad_client, umad_dev); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserr: 1158a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier while (--i >= s) 11598b37b94721533f2729c79bcb6fa0bb3e2bc2f400Michael S. Tsirkin ib_umad_kill_port(&umad_dev->port[i - s]); 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kref_put(&umad_dev->ref, ib_umad_release_dev); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ib_umad_remove_one(struct ib_device *device) 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct ib_umad_device *umad_dev = ib_get_client_data(device, &umad_client); 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!umad_dev) 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1172a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier for (i = 0; i <= umad_dev->end_port - umad_dev->start_port; ++i) 1173a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier ib_umad_kill_port(&umad_dev->port[i]); 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kref_put(&umad_dev->ref, ib_umad_release_dev); 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11782c9ede55ecec58099b72e4bb8eab719f32f72c31Al Virostatic char *umad_devnode(struct device *dev, umode_t *mode) 1179c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier{ 1180c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); 1181c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier} 1182c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init ib_umad_init(void) 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = register_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2, 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "infiniband_mad"); 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "user_mad: couldn't register device number\n"); 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1194a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier umad_class = class_create(THIS_MODULE, "infiniband_mad"); 1195a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier if (IS_ERR(umad_class)) { 1196a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier ret = PTR_ERR(umad_class); 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "user_mad: couldn't create class infiniband_mad\n"); 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_chrdev; 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier umad_class->devnode = umad_devnode; 1202c3af0980ce01dfb8e946990c3ae4c3727b1e9f26Roland Dreier 12030933e2d98d1b170ef62d48e18157f5dc43b58217Andi Kleen ret = class_create_file(umad_class, &class_attr_abi_version.attr); 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n"); 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_class; 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = ib_register_client(&umad_client); 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "user_mad: couldn't register ib_umad client\n"); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_class; 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_class: 1218a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier class_destroy(umad_class); 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_chrdev: 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit ib_umad_cleanup(void) 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ib_unregister_client(&umad_client); 1230a74968f8c3b1166cfe0942901b56165f06ab6f60Roland Dreier class_destroy(umad_class); 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_chrdev_region(base_dev, IB_UMAD_MAX_PORTS * 2); 12328698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang if (overflow_maj) 12338698d3feccda66fcb52748e7c7690bd1003f7849Alexander Chiang unregister_chrdev_region(overflow_maj, IB_UMAD_MAX_PORTS * 2); 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(ib_umad_init); 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(ib_umad_cleanup); 1238