litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'include/linux/drbd_limits.h')

0 files changed, 0 insertions, 0 deletions

/* * 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; struct ib_device_attr *dev_attr; /* Only handle iwarp devices */ if (device->node_type != RDMA_NODE_RNIC) return; dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); if (!dev_attr) return; if (ib_query_device(device, dev_attr)) { rdsdebug("Query device failed for %s\n", device->name); goto free_attr; } rds_iwdev = kmalloc(sizeof *rds_iwdev, GFP_KERNEL); if (!rds_iwdev) goto free_attr; spin_lock_init(&rds_iwdev->spinlock); rds_iwdev->dma_local_lkey = !!(dev_attr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY); rds_iwdev->max_wrs = dev_attr->max_qp_wr; rds_iwdev->max_sge = min(dev_attr->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); goto free_attr; 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); free_attr: kfree(dev_attr); } static void rds_iw_remove_one(struct ib_device *device) { struct rds_iw_device *rds_iwdev; struct rds_iw_cm_id *i_cm_id, *next; rds_iwdev = ib_get_client_data(device, &rds_iw_client); 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);


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