Overview: This is the first stage of a RDMA stack upgrade introducing kernel changes only based on Linux 5.7-rc1. This patch is based on about four main areas of work: - Update of the IB uobjects system: - The memory holding so-called AH, CQ, PD, SRQ and UCONTEXT objects is now managed by ibcore. This also require some changes in the kernel verbs API. The updated verbs changes are typically about initialize and deinitialize objects, and remove allocation and free of memory. - Update of the uverbs IOCTL framework: - The parsing and handling of user-space commands has been completely refactored to integrate with the updated IB uobjects system. - Various changes and updates to the generic uverbs interfaces in device drivers including the new uAPI surface. - The mlx5_ib_devx.c in mlx5ib and related mlx5 core changes. Dependencies: - The mlx4ib driver code has been updated with the minimum changes needed. - The mlx5ib driver code has been updated with the minimum changes needed including DV support. Compatibility: - All user-space facing APIs are backwards compatible after this change. - All kernel-space facing RDMA APIs are backwards compatible after this change, with exception of ib_create_ah() and ib_destroy_ah() which takes a new flag. - The "ib_device_ops" structure exist, but only contains the driver ID and some structure sizes. Differences from Linux: - Infiniband drivers must use the INIT_IB_DEVICE_OPS() macro to set the sizes needed for allocating various IB objects, when adding IB device instances. Security: - PRIV_NET_RAW is needed to use raw ethernet transmit features. - PRIV_DRIVER is needed to use other privileged operations. Based on upstream Linux, Torvalds (5.7-rc1): 8632e9b5645bbc2331d21d892b0d6961c1a08429 MFC after: 1 week Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D31149 Sponsored by: NVIDIA Networking
351 lines
10 KiB
C
351 lines
10 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2004 Voltaire, Inc. 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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#include <linux/string.h>
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#include <linux/slab.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_mad.h>
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#include <rdma/ib_smi.h>
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#include "mthca_dev.h"
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#include "mthca_cmd.h"
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enum {
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MTHCA_VENDOR_CLASS1 = 0x9,
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MTHCA_VENDOR_CLASS2 = 0xa
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};
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static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
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{
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struct ib_port_attr *tprops = NULL;
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int ret;
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tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
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if (!tprops)
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return -ENOMEM;
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ret = ib_query_port(&dev->ib_dev, port_num, tprops);
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if (ret) {
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printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n",
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ret, dev->ib_dev.name, port_num);
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goto out;
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}
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dev->rate[port_num - 1] = tprops->active_speed *
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ib_width_enum_to_int(tprops->active_width);
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out:
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kfree(tprops);
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return ret;
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}
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static void update_sm_ah(struct mthca_dev *dev,
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u8 port_num, u16 lid, u8 sl)
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{
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struct ib_ah *new_ah;
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struct ib_ah_attr ah_attr;
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unsigned long flags;
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if (!dev->send_agent[port_num - 1][0])
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return;
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = lid;
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ah_attr.sl = sl;
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ah_attr.port_num = port_num;
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new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
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&ah_attr, 0);
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if (IS_ERR(new_ah))
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return;
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spin_lock_irqsave(&dev->sm_lock, flags);
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if (dev->sm_ah[port_num - 1])
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ib_destroy_ah(dev->sm_ah[port_num - 1], 0);
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dev->sm_ah[port_num - 1] = new_ah;
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spin_unlock_irqrestore(&dev->sm_lock, flags);
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}
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/*
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* Snoop SM MADs for port info and P_Key table sets, so we can
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* synthesize LID change and P_Key change events.
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*/
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static void smp_snoop(struct ib_device *ibdev,
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u8 port_num,
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const struct ib_mad *mad,
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u16 prev_lid)
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{
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struct ib_event event;
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if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
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mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
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if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
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struct ib_port_info *pinfo =
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(struct ib_port_info *) ((struct ib_smp *) mad)->data;
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u16 lid = be16_to_cpu(pinfo->lid);
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mthca_update_rate(to_mdev(ibdev), port_num);
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update_sm_ah(to_mdev(ibdev), port_num,
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be16_to_cpu(pinfo->sm_lid),
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pinfo->neighbormtu_mastersmsl & 0xf);
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event.device = ibdev;
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event.element.port_num = port_num;
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if (pinfo->clientrereg_resv_subnetto & 0x80) {
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event.event = IB_EVENT_CLIENT_REREGISTER;
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ib_dispatch_event(&event);
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}
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if (prev_lid != lid) {
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event.event = IB_EVENT_LID_CHANGE;
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ib_dispatch_event(&event);
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}
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}
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if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
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event.device = ibdev;
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event.event = IB_EVENT_PKEY_CHANGE;
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event.element.port_num = port_num;
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ib_dispatch_event(&event);
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}
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}
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}
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static void node_desc_override(struct ib_device *dev,
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struct ib_mad *mad)
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{
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if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
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mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
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mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
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mutex_lock(&to_mdev(dev)->cap_mask_mutex);
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memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
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IB_DEVICE_NODE_DESC_MAX);
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mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
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}
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}
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static void forward_trap(struct mthca_dev *dev,
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u8 port_num,
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const struct ib_mad *mad)
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{
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int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
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struct ib_mad_send_buf *send_buf;
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struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
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int ret;
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unsigned long flags;
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if (agent) {
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send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
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IB_MGMT_MAD_DATA, GFP_ATOMIC,
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IB_MGMT_BASE_VERSION);
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if (IS_ERR(send_buf))
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return;
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/*
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* We rely here on the fact that MLX QPs don't use the
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* address handle after the send is posted (this is
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* wrong following the IB spec strictly, but we know
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* it's OK for our devices).
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*/
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spin_lock_irqsave(&dev->sm_lock, flags);
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memcpy(send_buf->mad, mad, sizeof *mad);
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if ((send_buf->ah = dev->sm_ah[port_num - 1]))
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ret = ib_post_send_mad(send_buf, NULL);
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else
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ret = -EINVAL;
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spin_unlock_irqrestore(&dev->sm_lock, flags);
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if (ret)
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ib_free_send_mad(send_buf);
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}
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}
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int mthca_process_mad(struct ib_device *ibdev,
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int mad_flags,
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u8 port_num,
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const struct ib_wc *in_wc,
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const struct ib_grh *in_grh,
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const struct ib_mad_hdr *in, size_t in_mad_size,
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struct ib_mad_hdr *out, size_t *out_mad_size,
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u16 *out_mad_pkey_index)
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{
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int err;
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u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
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u16 prev_lid = 0;
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struct ib_port_attr pattr;
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const struct ib_mad *in_mad = (const struct ib_mad *)in;
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struct ib_mad *out_mad = (struct ib_mad *)out;
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if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
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*out_mad_size != sizeof(*out_mad)))
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return IB_MAD_RESULT_FAILURE;
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/* Forward locally generated traps to the SM */
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if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
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slid == 0) {
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forward_trap(to_mdev(ibdev), port_num, in_mad);
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
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}
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/*
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* Only handle SM gets, sets and trap represses for SM class
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*
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* Only handle PMA and Mellanox vendor-specific class gets and
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* sets for other classes.
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*/
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if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
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if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
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return IB_MAD_RESULT_SUCCESS;
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/*
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* Don't process SMInfo queries or vendor-specific
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* MADs -- the SMA can't handle them.
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*/
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if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
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((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
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IB_SMP_ATTR_VENDOR_MASK))
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return IB_MAD_RESULT_SUCCESS;
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} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
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in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
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in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
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if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
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in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
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return IB_MAD_RESULT_SUCCESS;
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} else
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return IB_MAD_RESULT_SUCCESS;
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if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
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in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
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in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
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in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
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!ib_query_port(ibdev, port_num, &pattr))
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prev_lid = pattr.lid;
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err = mthca_MAD_IFC(to_mdev(ibdev),
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mad_flags & IB_MAD_IGNORE_MKEY,
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mad_flags & IB_MAD_IGNORE_BKEY,
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port_num, in_wc, in_grh, in_mad, out_mad);
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if (err == -EBADMSG)
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return IB_MAD_RESULT_SUCCESS;
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else if (err) {
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mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
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return IB_MAD_RESULT_FAILURE;
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}
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if (!out_mad->mad_hdr.status) {
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smp_snoop(ibdev, port_num, in_mad, prev_lid);
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node_desc_override(ibdev, out_mad);
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}
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/* set return bit in status of directed route responses */
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if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
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out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
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if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
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/* no response for trap repress */
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
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return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
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}
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static void send_handler(struct ib_mad_agent *agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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ib_free_send_mad(mad_send_wc->send_buf);
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}
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int mthca_create_agents(struct mthca_dev *dev)
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{
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struct ib_mad_agent *agent;
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int p, q;
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int ret;
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spin_lock_init(&dev->sm_lock);
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for (p = 0; p < dev->limits.num_ports; ++p)
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for (q = 0; q <= 1; ++q) {
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agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
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q ? IB_QPT_GSI : IB_QPT_SMI,
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NULL, 0, send_handler,
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NULL, NULL, 0);
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if (IS_ERR(agent)) {
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ret = PTR_ERR(agent);
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goto err;
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}
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dev->send_agent[p][q] = agent;
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}
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for (p = 1; p <= dev->limits.num_ports; ++p) {
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ret = mthca_update_rate(dev, p);
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if (ret) {
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mthca_err(dev, "Failed to obtain port %d rate."
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" aborting.\n", p);
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goto err;
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}
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}
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return 0;
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err:
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for (p = 0; p < dev->limits.num_ports; ++p)
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for (q = 0; q <= 1; ++q)
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if (dev->send_agent[p][q])
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ib_unregister_mad_agent(dev->send_agent[p][q]);
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return ret;
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}
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void mthca_free_agents(struct mthca_dev *dev)
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{
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struct ib_mad_agent *agent;
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int p, q;
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for (p = 0; p < dev->limits.num_ports; ++p) {
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for (q = 0; q <= 1; ++q) {
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agent = dev->send_agent[p][q];
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dev->send_agent[p][q] = NULL;
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ib_unregister_mad_agent(agent);
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}
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if (dev->sm_ah[p])
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ib_destroy_ah(dev->sm_ah[p],
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RDMA_DESTROY_AH_SLEEPABLE);
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}
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}
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