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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /net/rds/iw.c
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'net/rds/iw.c')
-rw-r--r--net/rds/iw.c312
1 files changed, 0 insertions, 312 deletions
diff --git a/net/rds/iw.c b/net/rds/iw.c
deleted file mode 100644
index f4a9fff82..000000000
--- a/net/rds/iw.c
+++ /dev/null
@@ -1,312 +0,0 @@
-/*
- * Copyright (c) 2006 Oracle. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- */
-#include <linux/kernel.h>
-#include <linux/in.h>
-#include <linux/if.h>
-#include <linux/netdevice.h>
-#include <linux/inetdevice.h>
-#include <linux/if_arp.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-
-#include "rds.h"
-#include "iw.h"
-
-unsigned int fastreg_pool_size = RDS_FASTREG_POOL_SIZE;
-unsigned int fastreg_message_size = RDS_FASTREG_SIZE + 1; /* +1 allows for unaligned MRs */
-
-module_param(fastreg_pool_size, int, 0444);
-MODULE_PARM_DESC(fastreg_pool_size, " Max number of fastreg MRs per device");
-module_param(fastreg_message_size, int, 0444);
-MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MRs)");
-
-struct list_head rds_iw_devices;
-
-/* NOTE: if also grabbing iwdev lock, grab this first */
-DEFINE_SPINLOCK(iw_nodev_conns_lock);
-LIST_HEAD(iw_nodev_conns);
-
-static void rds_iw_add_one(struct ib_device *device)
-{
- struct rds_iw_device *rds_iwdev;
-
- /* Only handle iwarp devices */
- if (device->node_type != RDMA_NODE_RNIC)
- return;
-
- rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL);
- if (!rds_iwdev)
- return;
-
- spin_lock_init(&rds_iwdev->spinlock);
-
- rds_iwdev->dma_local_lkey = !!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY);
- rds_iwdev->max_wrs = device->attrs.max_qp_wr;
- rds_iwdev->max_sge = min(device->attrs.max_sge, RDS_IW_MAX_SGE);
-
- rds_iwdev->dev = device;
- rds_iwdev->pd = ib_alloc_pd(device);
- if (IS_ERR(rds_iwdev->pd))
- goto free_dev;
-
- if (!rds_iwdev->dma_local_lkey) {
- rds_iwdev->mr = ib_get_dma_mr(rds_iwdev->pd,
- IB_ACCESS_REMOTE_READ |
- IB_ACCESS_REMOTE_WRITE |
- IB_ACCESS_LOCAL_WRITE);
- if (IS_ERR(rds_iwdev->mr))
- goto err_pd;
- } else
- rds_iwdev->mr = NULL;
-
- rds_iwdev->mr_pool = rds_iw_create_mr_pool(rds_iwdev);
- if (IS_ERR(rds_iwdev->mr_pool)) {
- rds_iwdev->mr_pool = NULL;
- goto err_mr;
- }
-
- INIT_LIST_HEAD(&rds_iwdev->cm_id_list);
- INIT_LIST_HEAD(&rds_iwdev->conn_list);
- list_add_tail(&rds_iwdev->list, &rds_iw_devices);
-
- ib_set_client_data(device, &rds_iw_client, rds_iwdev);
- return;
-
-err_mr:
- if (rds_iwdev->mr)
- ib_dereg_mr(rds_iwdev->mr);
-err_pd:
- ib_dealloc_pd(rds_iwdev->pd);
-free_dev:
- kfree(rds_iwdev);
-}
-
-static void rds_iw_remove_one(struct ib_device *device, void *client_data)
-{
- struct rds_iw_device *rds_iwdev = client_data;
- struct rds_iw_cm_id *i_cm_id, *next;
-
- if (!rds_iwdev)
- return;
-
- spin_lock_irq(&rds_iwdev->spinlock);
- list_for_each_entry_safe(i_cm_id, next, &rds_iwdev->cm_id_list, list) {
- list_del(&i_cm_id->list);
- kfree(i_cm_id);
- }
- spin_unlock_irq(&rds_iwdev->spinlock);
-
- rds_iw_destroy_conns(rds_iwdev);
-
- if (rds_iwdev->mr_pool)
- rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);
-
- if (rds_iwdev->mr)
- ib_dereg_mr(rds_iwdev->mr);
-
- ib_dealloc_pd(rds_iwdev->pd);
-
- list_del(&rds_iwdev->list);
- kfree(rds_iwdev);
-}
-
-struct ib_client rds_iw_client = {
- .name = "rds_iw",
- .add = rds_iw_add_one,
- .remove = rds_iw_remove_one
-};
-
-static int rds_iw_conn_info_visitor(struct rds_connection *conn,
- void *buffer)
-{
- struct rds_info_rdma_connection *iinfo = buffer;
- struct rds_iw_connection *ic;
-
- /* We will only ever look at IB transports */
- if (conn->c_trans != &rds_iw_transport)
- return 0;
-
- iinfo->src_addr = conn->c_laddr;
- iinfo->dst_addr = conn->c_faddr;
-
- memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
- memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
- if (rds_conn_state(conn) == RDS_CONN_UP) {
- struct rds_iw_device *rds_iwdev;
- struct rdma_dev_addr *dev_addr;
-
- ic = conn->c_transport_data;
- dev_addr = &ic->i_cm_id->route.addr.dev_addr;
-
- rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
- rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
-
- rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
- iinfo->max_send_wr = ic->i_send_ring.w_nr;
- iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
- iinfo->max_send_sge = rds_iwdev->max_sge;
- rds_iw_get_mr_info(rds_iwdev, iinfo);
- }
- return 1;
-}
-
-static void rds_iw_ic_info(struct socket *sock, unsigned int len,
- struct rds_info_iterator *iter,
- struct rds_info_lengths *lens)
-{
- rds_for_each_conn_info(sock, len, iter, lens,
- rds_iw_conn_info_visitor,
- sizeof(struct rds_info_rdma_connection));
-}
-
-
-/*
- * Early RDS/IB was built to only bind to an address if there is an IPoIB
- * device with that address set.
- *
- * If it were me, I'd advocate for something more flexible. Sending and
- * receiving should be device-agnostic. Transports would try and maintain
- * connections between peers who have messages queued. Userspace would be
- * allowed to influence which paths have priority. We could call userspace
- * asserting this policy "routing".
- */
-static int rds_iw_laddr_check(struct net *net, __be32 addr)
-{
- int ret;
- struct rdma_cm_id *cm_id;
- struct sockaddr_in sin;
-
- /* Create a CMA ID and try to bind it. This catches both
- * IB and iWARP capable NICs.
- */
- cm_id = rdma_create_id(&init_net, NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
- if (IS_ERR(cm_id))
- return PTR_ERR(cm_id);
-
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = addr;
-
- /* rdma_bind_addr will only succeed for IB & iWARP devices */
- ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
- /* due to this, we will claim to support IB devices unless we
- check node_type. */
- if (ret || !cm_id->device ||
- cm_id->device->node_type != RDMA_NODE_RNIC)
- ret = -EADDRNOTAVAIL;
-
- rdsdebug("addr %pI4 ret %d node type %d\n",
- &addr, ret,
- cm_id->device ? cm_id->device->node_type : -1);
-
- rdma_destroy_id(cm_id);
-
- return ret;
-}
-
-void rds_iw_exit(void)
-{
- rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
- rds_iw_destroy_nodev_conns();
- ib_unregister_client(&rds_iw_client);
- rds_iw_sysctl_exit();
- rds_iw_recv_exit();
- rds_trans_unregister(&rds_iw_transport);
-}
-
-struct rds_transport rds_iw_transport = {
- .laddr_check = rds_iw_laddr_check,
- .xmit_complete = rds_iw_xmit_complete,
- .xmit = rds_iw_xmit,
- .xmit_rdma = rds_iw_xmit_rdma,
- .recv = rds_iw_recv,
- .conn_alloc = rds_iw_conn_alloc,
- .conn_free = rds_iw_conn_free,
- .conn_connect = rds_iw_conn_connect,
- .conn_shutdown = rds_iw_conn_shutdown,
- .inc_copy_to_user = rds_iw_inc_copy_to_user,
- .inc_free = rds_iw_inc_free,
- .cm_initiate_connect = rds_iw_cm_initiate_connect,
- .cm_handle_connect = rds_iw_cm_handle_connect,
- .cm_connect_complete = rds_iw_cm_connect_complete,
- .stats_info_copy = rds_iw_stats_info_copy,
- .exit = rds_iw_exit,
- .get_mr = rds_iw_get_mr,
- .sync_mr = rds_iw_sync_mr,
- .free_mr = rds_iw_free_mr,
- .flush_mrs = rds_iw_flush_mrs,
- .t_owner = THIS_MODULE,
- .t_name = "iwarp",
- .t_type = RDS_TRANS_IWARP,
- .t_prefer_loopback = 1,
-};
-
-int rds_iw_init(void)
-{
- int ret;
-
- INIT_LIST_HEAD(&rds_iw_devices);
-
- ret = ib_register_client(&rds_iw_client);
- if (ret)
- goto out;
-
- ret = rds_iw_sysctl_init();
- if (ret)
- goto out_ibreg;
-
- ret = rds_iw_recv_init();
- if (ret)
- goto out_sysctl;
-
- ret = rds_trans_register(&rds_iw_transport);
- if (ret)
- goto out_recv;
-
- rds_info_register_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
-
- goto out;
-
-out_recv:
- rds_iw_recv_exit();
-out_sysctl:
- rds_iw_sysctl_exit();
-out_ibreg:
- ib_unregister_client(&rds_iw_client);
-out:
- return ret;
-}
-
-MODULE_LICENSE("GPL");
-