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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
- Create drivers/staging/rdma - Move amso1100 driver to staging/rdma and schedule for deletion - Move ipath driver to staging/rdma and schedule for deletion - Add hfi1 driver to staging/rdma and set TODO for move to regular tree - Initial support for namespaces to be used on RDMA devices - Add RoCE GID table handling to the RDMA core caching code - Infrastructure to support handling of devices with differing read and write scatter gather capabilities - Various iSER updates - Kill off unsafe usage of global mr registrations - Update SRP driver - Misc. mlx4 driver updates - Support for the mr_alloc verb - Support for a netlink interface between kernel and user space cache daemon to speed path record queries and route resolution - Ininitial support for safe hot removal of verbs devices -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJV7v8wAAoJELgmozMOVy/d2dcP/3PXnGFPgFGJODKE6VCZtTvj nooNXRKXjxv470UT5DiAX7SNcBxzzS7Zl/Lj+831H9iNXUyzuH31KtBOAZ3W03vZ yXwCB2caOStSldTRSUUvPe2aIFPnyNmSpC4i6XcJLJMCFijKmxin5pAo8qE44BQU yjhT+wC9P6LL5wZXsn/nFIMLjOFfu0WBFHNp3gs5j59paxlx5VeIAZk16aQZH135 m7YCyicwrS8iyWQl2bEXRMon2vlCHlX2RHmOJ4f/P5I0quNcGF2+d8Yxa+K1VyC5 zcb3OBezz+wZtvh16yhsDfSPqHWirljwID2VzOgRSzTJWvQjju8VkwHtkq6bYoBW egIxGCHcGWsD0R5iBXLYr/tB+BmjbDObSm0AsR4+JvSShkeVA1IpeoO+19162ixE n6CQnk2jCee8KXeIN4PoIKsjRSbIECM0JliWPLoIpuTuEhhpajftlSLgL5hf1dzp HrSy6fXmmoRj7wlTa7DnYIC3X+ffwckB8/t1zMAm2sKnIFUTjtQXF7upNiiyWk4L /T1QEzJ2bLQckQ9yY4v528SvBQwA4Dy1amIQB7SU8+2S//bYdUvhysWPkdKC4oOT WlqS5PFDCI31MvNbbM3rUbMAD8eBAR8ACw9ZpGI/Rffm5FEX5W3LoxA8gfEBRuqt 30ZYFuW8evTL+YQcaV65 =EHLg -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull inifiniband/rdma updates from Doug Ledford: "This is a fairly sizeable set of changes. I've put them through a decent amount of testing prior to sending the pull request due to that. There are still a few fixups that I know are coming, but I wanted to go ahead and get the big, sizable chunk into your hands sooner rather than waiting for those last few fixups. Of note is the fact that this creates what is intended to be a temporary area in the drivers/staging tree specifically for some cleanups and additions that are coming for the RDMA stack. We deprecated two drivers (ipath and amso1100) and are waiting to hear back if we can deprecate another one (ehca). We also put Intel's new hfi1 driver into this area because it needs to be refactored and a transfer library created out of the factored out code, and then it and the qib driver and the soft-roce driver should all be modified to use that library. I expect drivers/staging/rdma to be around for three or four kernel releases and then to go away as all of the work is completed and final deletions of deprecated drivers are done. Summary of changes for 4.3: - Create drivers/staging/rdma - Move amso1100 driver to staging/rdma and schedule for deletion - Move ipath driver to staging/rdma and schedule for deletion - Add hfi1 driver to staging/rdma and set TODO for move to regular tree - Initial support for namespaces to be used on RDMA devices - Add RoCE GID table handling to the RDMA core caching code - Infrastructure to support handling of devices with differing read and write scatter gather capabilities - Various iSER updates - Kill off unsafe usage of global mr registrations - Update SRP driver - Misc mlx4 driver updates - Support for the mr_alloc verb - Support for a netlink interface between kernel and user space cache daemon to speed path record queries and route resolution - Ininitial support for safe hot removal of verbs devices" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (136 commits) IB/ipoib: Suppress warning for send only join failures IB/ipoib: Clean up send-only multicast joins IB/srp: Fix possible protection fault IB/core: Move SM class defines from ib_mad.h to ib_smi.h IB/core: Remove unnecessary defines from ib_mad.h IB/hfi1: Add PSM2 user space header to header_install IB/hfi1: Add CSRs for CONFIG_SDMA_VERBOSITY mlx5: Fix incorrect wc pkey_index assignment for GSI messages IB/mlx5: avoid destroying a NULL mr in reg_user_mr error flow IB/uverbs: reject invalid or unknown opcodes IB/cxgb4: Fix if statement in pick_local_ip6adddrs IB/sa: Fix rdma netlink message flags IB/ucma: HW Device hot-removal support IB/mlx4_ib: Disassociate support IB/uverbs: Enable device removal when there are active user space applications IB/uverbs: Explicitly pass ib_dev to uverbs commands IB/uverbs: Fix race between ib_uverbs_open and remove_one IB/uverbs: Fix reference counting usage of event files IB/core: Make ib_dealloc_pd return void IB/srp: Create an insecure all physical rkey only if needed ...
433 lines
12 KiB
C
433 lines
12 KiB
C
/*
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* Copyright (c) 2006 Oracle. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/in.h>
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#include <linux/if.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/if_arp.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "rds.h"
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#include "ib.h"
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static unsigned int fmr_pool_size = RDS_FMR_POOL_SIZE;
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unsigned int fmr_message_size = RDS_FMR_SIZE + 1; /* +1 allows for unaligned MRs */
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unsigned int rds_ib_retry_count = RDS_IB_DEFAULT_RETRY_COUNT;
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module_param(fmr_pool_size, int, 0444);
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MODULE_PARM_DESC(fmr_pool_size, " Max number of fmr per HCA");
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module_param(fmr_message_size, int, 0444);
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MODULE_PARM_DESC(fmr_message_size, " Max size of a RDMA transfer");
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module_param(rds_ib_retry_count, int, 0444);
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MODULE_PARM_DESC(rds_ib_retry_count, " Number of hw retries before reporting an error");
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/*
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* we have a clumsy combination of RCU and a rwsem protecting this list
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* because it is used both in the get_mr fast path and while blocking in
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* the FMR flushing path.
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*/
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DECLARE_RWSEM(rds_ib_devices_lock);
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struct list_head rds_ib_devices;
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/* NOTE: if also grabbing ibdev lock, grab this first */
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DEFINE_SPINLOCK(ib_nodev_conns_lock);
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LIST_HEAD(ib_nodev_conns);
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static void rds_ib_nodev_connect(void)
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{
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struct rds_ib_connection *ic;
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spin_lock(&ib_nodev_conns_lock);
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list_for_each_entry(ic, &ib_nodev_conns, ib_node)
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rds_conn_connect_if_down(ic->conn);
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spin_unlock(&ib_nodev_conns_lock);
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}
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static void rds_ib_dev_shutdown(struct rds_ib_device *rds_ibdev)
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{
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struct rds_ib_connection *ic;
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unsigned long flags;
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spin_lock_irqsave(&rds_ibdev->spinlock, flags);
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list_for_each_entry(ic, &rds_ibdev->conn_list, ib_node)
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rds_conn_drop(ic->conn);
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spin_unlock_irqrestore(&rds_ibdev->spinlock, flags);
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}
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/*
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* rds_ib_destroy_mr_pool() blocks on a few things and mrs drop references
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* from interrupt context so we push freing off into a work struct in krdsd.
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*/
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static void rds_ib_dev_free(struct work_struct *work)
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{
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struct rds_ib_ipaddr *i_ipaddr, *i_next;
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struct rds_ib_device *rds_ibdev = container_of(work,
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struct rds_ib_device, free_work);
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if (rds_ibdev->mr_pool)
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rds_ib_destroy_mr_pool(rds_ibdev->mr_pool);
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if (rds_ibdev->pd)
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ib_dealloc_pd(rds_ibdev->pd);
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list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) {
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list_del(&i_ipaddr->list);
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kfree(i_ipaddr);
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}
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kfree(rds_ibdev);
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}
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void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
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{
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BUG_ON(atomic_read(&rds_ibdev->refcount) <= 0);
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if (atomic_dec_and_test(&rds_ibdev->refcount))
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queue_work(rds_wq, &rds_ibdev->free_work);
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}
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static void rds_ib_add_one(struct ib_device *device)
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{
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struct rds_ib_device *rds_ibdev;
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struct ib_device_attr *dev_attr;
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/* Only handle IB (no iWARP) devices */
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if (device->node_type != RDMA_NODE_IB_CA)
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return;
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dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
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if (!dev_attr)
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return;
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if (ib_query_device(device, dev_attr)) {
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rdsdebug("Query device failed for %s\n", device->name);
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goto free_attr;
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}
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rds_ibdev = kzalloc_node(sizeof(struct rds_ib_device), GFP_KERNEL,
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ibdev_to_node(device));
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if (!rds_ibdev)
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goto free_attr;
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spin_lock_init(&rds_ibdev->spinlock);
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atomic_set(&rds_ibdev->refcount, 1);
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INIT_WORK(&rds_ibdev->free_work, rds_ib_dev_free);
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rds_ibdev->max_wrs = dev_attr->max_qp_wr;
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rds_ibdev->max_sge = min(dev_attr->max_sge, RDS_IB_MAX_SGE);
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rds_ibdev->fmr_max_remaps = dev_attr->max_map_per_fmr?: 32;
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rds_ibdev->max_fmrs = dev_attr->max_fmr ?
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min_t(unsigned int, dev_attr->max_fmr, fmr_pool_size) :
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fmr_pool_size;
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rds_ibdev->max_initiator_depth = dev_attr->max_qp_init_rd_atom;
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rds_ibdev->max_responder_resources = dev_attr->max_qp_rd_atom;
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rds_ibdev->dev = device;
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rds_ibdev->pd = ib_alloc_pd(device);
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if (IS_ERR(rds_ibdev->pd)) {
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rds_ibdev->pd = NULL;
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goto put_dev;
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}
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rds_ibdev->mr_pool = rds_ib_create_mr_pool(rds_ibdev);
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if (IS_ERR(rds_ibdev->mr_pool)) {
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rds_ibdev->mr_pool = NULL;
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goto put_dev;
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}
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INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
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INIT_LIST_HEAD(&rds_ibdev->conn_list);
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down_write(&rds_ib_devices_lock);
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list_add_tail_rcu(&rds_ibdev->list, &rds_ib_devices);
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up_write(&rds_ib_devices_lock);
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atomic_inc(&rds_ibdev->refcount);
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ib_set_client_data(device, &rds_ib_client, rds_ibdev);
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atomic_inc(&rds_ibdev->refcount);
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rds_ib_nodev_connect();
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put_dev:
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rds_ib_dev_put(rds_ibdev);
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free_attr:
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kfree(dev_attr);
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}
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/*
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* New connections use this to find the device to associate with the
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* connection. It's not in the fast path so we're not concerned about the
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* performance of the IB call. (As of this writing, it uses an interrupt
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* blocking spinlock to serialize walking a per-device list of all registered
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* clients.)
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*
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* RCU is used to handle incoming connections racing with device teardown.
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* Rather than use a lock to serialize removal from the client_data and
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* getting a new reference, we use an RCU grace period. The destruction
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* path removes the device from client_data and then waits for all RCU
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* readers to finish.
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*
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* A new connection can get NULL from this if its arriving on a
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* device that is in the process of being removed.
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*/
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struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device)
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{
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struct rds_ib_device *rds_ibdev;
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rcu_read_lock();
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rds_ibdev = ib_get_client_data(device, &rds_ib_client);
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if (rds_ibdev)
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atomic_inc(&rds_ibdev->refcount);
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rcu_read_unlock();
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return rds_ibdev;
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}
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/*
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* The IB stack is letting us know that a device is going away. This can
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* happen if the underlying HCA driver is removed or if PCI hotplug is removing
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* the pci function, for example.
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*
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* This can be called at any time and can be racing with any other RDS path.
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*/
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static void rds_ib_remove_one(struct ib_device *device, void *client_data)
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{
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struct rds_ib_device *rds_ibdev = client_data;
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if (!rds_ibdev)
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return;
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rds_ib_dev_shutdown(rds_ibdev);
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/* stop connection attempts from getting a reference to this device. */
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ib_set_client_data(device, &rds_ib_client, NULL);
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down_write(&rds_ib_devices_lock);
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list_del_rcu(&rds_ibdev->list);
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up_write(&rds_ib_devices_lock);
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/*
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* This synchronize rcu is waiting for readers of both the ib
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* client data and the devices list to finish before we drop
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* both of those references.
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*/
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synchronize_rcu();
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rds_ib_dev_put(rds_ibdev);
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rds_ib_dev_put(rds_ibdev);
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}
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struct ib_client rds_ib_client = {
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.name = "rds_ib",
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.add = rds_ib_add_one,
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.remove = rds_ib_remove_one
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};
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static int rds_ib_conn_info_visitor(struct rds_connection *conn,
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void *buffer)
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{
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struct rds_info_rdma_connection *iinfo = buffer;
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struct rds_ib_connection *ic;
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/* We will only ever look at IB transports */
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if (conn->c_trans != &rds_ib_transport)
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return 0;
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iinfo->src_addr = conn->c_laddr;
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iinfo->dst_addr = conn->c_faddr;
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memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
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memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
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if (rds_conn_state(conn) == RDS_CONN_UP) {
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struct rds_ib_device *rds_ibdev;
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struct rdma_dev_addr *dev_addr;
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ic = conn->c_transport_data;
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dev_addr = &ic->i_cm_id->route.addr.dev_addr;
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rdma_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
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rdma_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
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rds_ibdev = ic->rds_ibdev;
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iinfo->max_send_wr = ic->i_send_ring.w_nr;
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iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
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iinfo->max_send_sge = rds_ibdev->max_sge;
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rds_ib_get_mr_info(rds_ibdev, iinfo);
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}
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return 1;
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}
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static void rds_ib_ic_info(struct socket *sock, unsigned int len,
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struct rds_info_iterator *iter,
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struct rds_info_lengths *lens)
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{
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rds_for_each_conn_info(sock, len, iter, lens,
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rds_ib_conn_info_visitor,
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sizeof(struct rds_info_rdma_connection));
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}
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/*
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* Early RDS/IB was built to only bind to an address if there is an IPoIB
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* device with that address set.
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*
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* If it were me, I'd advocate for something more flexible. Sending and
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* receiving should be device-agnostic. Transports would try and maintain
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* connections between peers who have messages queued. Userspace would be
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* allowed to influence which paths have priority. We could call userspace
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* asserting this policy "routing".
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*/
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static int rds_ib_laddr_check(struct net *net, __be32 addr)
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{
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int ret;
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struct rdma_cm_id *cm_id;
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struct sockaddr_in sin;
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/* Create a CMA ID and try to bind it. This catches both
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* IB and iWARP capable NICs.
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*/
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cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
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if (IS_ERR(cm_id))
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return PTR_ERR(cm_id);
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = addr;
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/* rdma_bind_addr will only succeed for IB & iWARP devices */
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ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
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/* due to this, we will claim to support iWARP devices unless we
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check node_type. */
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if (ret || !cm_id->device ||
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cm_id->device->node_type != RDMA_NODE_IB_CA)
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ret = -EADDRNOTAVAIL;
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rdsdebug("addr %pI4 ret %d node type %d\n",
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&addr, ret,
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cm_id->device ? cm_id->device->node_type : -1);
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rdma_destroy_id(cm_id);
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return ret;
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}
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static void rds_ib_unregister_client(void)
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{
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ib_unregister_client(&rds_ib_client);
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/* wait for rds_ib_dev_free() to complete */
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flush_workqueue(rds_wq);
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}
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void rds_ib_exit(void)
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{
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rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
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rds_ib_unregister_client();
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rds_ib_destroy_nodev_conns();
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rds_ib_sysctl_exit();
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rds_ib_recv_exit();
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rds_trans_unregister(&rds_ib_transport);
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rds_ib_fmr_exit();
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}
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struct rds_transport rds_ib_transport = {
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.laddr_check = rds_ib_laddr_check,
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.xmit_complete = rds_ib_xmit_complete,
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.xmit = rds_ib_xmit,
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.xmit_rdma = rds_ib_xmit_rdma,
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.xmit_atomic = rds_ib_xmit_atomic,
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.recv = rds_ib_recv,
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.conn_alloc = rds_ib_conn_alloc,
|
|
.conn_free = rds_ib_conn_free,
|
|
.conn_connect = rds_ib_conn_connect,
|
|
.conn_shutdown = rds_ib_conn_shutdown,
|
|
.inc_copy_to_user = rds_ib_inc_copy_to_user,
|
|
.inc_free = rds_ib_inc_free,
|
|
.cm_initiate_connect = rds_ib_cm_initiate_connect,
|
|
.cm_handle_connect = rds_ib_cm_handle_connect,
|
|
.cm_connect_complete = rds_ib_cm_connect_complete,
|
|
.stats_info_copy = rds_ib_stats_info_copy,
|
|
.exit = rds_ib_exit,
|
|
.get_mr = rds_ib_get_mr,
|
|
.sync_mr = rds_ib_sync_mr,
|
|
.free_mr = rds_ib_free_mr,
|
|
.flush_mrs = rds_ib_flush_mrs,
|
|
.t_owner = THIS_MODULE,
|
|
.t_name = "infiniband",
|
|
.t_type = RDS_TRANS_IB
|
|
};
|
|
|
|
int rds_ib_init(void)
|
|
{
|
|
int ret;
|
|
|
|
INIT_LIST_HEAD(&rds_ib_devices);
|
|
|
|
ret = rds_ib_fmr_init();
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_register_client(&rds_ib_client);
|
|
if (ret)
|
|
goto out_fmr_exit;
|
|
|
|
ret = rds_ib_sysctl_init();
|
|
if (ret)
|
|
goto out_ibreg;
|
|
|
|
ret = rds_ib_recv_init();
|
|
if (ret)
|
|
goto out_sysctl;
|
|
|
|
ret = rds_trans_register(&rds_ib_transport);
|
|
if (ret)
|
|
goto out_recv;
|
|
|
|
rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
|
|
|
|
goto out;
|
|
|
|
out_recv:
|
|
rds_ib_recv_exit();
|
|
out_sysctl:
|
|
rds_ib_sysctl_exit();
|
|
out_ibreg:
|
|
rds_ib_unregister_client();
|
|
out_fmr_exit:
|
|
rds_ib_fmr_exit();
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|