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![Mark Bloch](/assets/img/avatar_default.png)
Current code uses many different types when dealing with a port of a RDMA device: u8, unsigned int and u32. Switch to u32 to clean up the logic. This allows us to make (at least) the core view consistent and use the same type. Unfortunately not all places can be converted. Many uverbs functions expect port to be u8 so keep those places in order not to break UAPIs. HW/Spec defined values must also not be changed. With the switch to u32 we now can support devices with more than 255 ports. U32_MAX is reserved to make control logic a bit easier to deal with. As a device with U32_MAX ports probably isn't going to happen any time soon this seems like a non issue. When a device with more than 255 ports is created uverbs will report the RDMA device as having 255 ports as this is the max currently supported. The verbs interface is not changed yet because the IBTA spec limits the port size in too many places to be u8 and all applications that relies in verbs won't be able to cope with this change. At this stage, we are extending the interfaces that are using vendor channel solely Once the limitation is lifted mlx5 in switchdev mode will be able to have thousands of SFs created by the device. As the only instance of an RDMA device that reports more than 255 ports will be a representor device and it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other ULPs aren't effected by this change and their sysfs/interfaces that are exposes to userspace can remain unchanged. While here cleanup some alignment issues and remove unneeded sanity checks (mainly in rdmavt), Link: https://lore.kernel.org/r/20210301070420.439400-1-leon@kernel.org Signed-off-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
268 lines
8.1 KiB
C
268 lines
8.1 KiB
C
/* This file is part of the Emulex RoCE Device Driver for
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* RoCE (RDMA over Converged Ethernet) adapters.
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* Copyright (C) 2012-2015 Emulex. All rights reserved.
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* EMULEX and SLI are trademarks of Emulex.
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* www.emulex.com
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*
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* This software is available to you under a choice of one of two licenses.
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* You may choose to be licensed under the terms of the GNU General Public
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* License (GPL) Version 2, available from the file COPYING in the main
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* directory of this source tree, or the BSD license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Contact Information:
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* linux-drivers@emulex.com
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*
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* Emulex
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* 3333 Susan Street
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* Costa Mesa, CA 92626
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*/
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#include <net/neighbour.h>
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#include <net/netevent.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_mad.h>
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#include <rdma/ib_cache.h>
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#include "ocrdma.h"
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#include "ocrdma_verbs.h"
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#include "ocrdma_ah.h"
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#include "ocrdma_hw.h"
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#include "ocrdma_stats.h"
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#define OCRDMA_VID_PCP_SHIFT 0xD
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static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
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{
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switch (hdr_type) {
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case OCRDMA_L3_TYPE_IB_GRH:
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return (u16)ETH_P_IBOE;
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case OCRDMA_L3_TYPE_IPV4:
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return (u16)0x0800;
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case OCRDMA_L3_TYPE_IPV6:
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return (u16)0x86dd;
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default:
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pr_err("ocrdma%d: Invalid network header\n", devid);
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return 0;
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}
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}
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static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
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struct rdma_ah_attr *attr, const union ib_gid *sgid,
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int pdid, bool *isvlan, u16 vlan_tag)
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{
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int status;
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struct ocrdma_eth_vlan eth;
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struct ocrdma_grh grh;
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int eth_sz;
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u16 proto_num = 0;
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u8 nxthdr = 0x11;
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struct iphdr ipv4;
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const struct ib_global_route *ib_grh;
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union {
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
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} sgid_addr, dgid_addr;
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memset(ð, 0, sizeof(eth));
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memset(&grh, 0, sizeof(grh));
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/* Protocol Number */
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proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
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if (!proto_num)
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return -EINVAL;
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nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;
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/* VLAN */
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if (!vlan_tag || (vlan_tag > 0xFFF))
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vlan_tag = dev->pvid;
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if (vlan_tag || dev->pfc_state) {
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if (!vlan_tag) {
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pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
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dev->id);
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pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
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dev->id);
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}
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eth.eth_type = cpu_to_be16(0x8100);
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eth.roce_eth_type = cpu_to_be16(proto_num);
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vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
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eth.vlan_tag = cpu_to_be16(vlan_tag);
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eth_sz = sizeof(struct ocrdma_eth_vlan);
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*isvlan = true;
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} else {
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eth.eth_type = cpu_to_be16(proto_num);
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eth_sz = sizeof(struct ocrdma_eth_basic);
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}
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/* MAC */
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memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
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status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
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if (status)
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return status;
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ib_grh = rdma_ah_read_grh(attr);
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ah->sgid_index = ib_grh->sgid_index;
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/* Eth HDR */
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memcpy(&ah->av->eth_hdr, ð, eth_sz);
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if (ah->hdr_type == RDMA_NETWORK_IPV4) {
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*((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
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ib_grh->traffic_class);
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ipv4.id = cpu_to_be16(pdid);
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ipv4.frag_off = htons(IP_DF);
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ipv4.tot_len = htons(0);
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ipv4.ttl = ib_grh->hop_limit;
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ipv4.protocol = nxthdr;
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rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid);
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ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
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rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid);
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ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
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memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
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} else {
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memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
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grh.tclass_flow = cpu_to_be32((6 << 28) |
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(ib_grh->traffic_class << 24) |
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ib_grh->flow_label);
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memcpy(&grh.dgid[0], ib_grh->dgid.raw,
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sizeof(ib_grh->dgid.raw));
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grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
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(nxthdr << 8) |
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ib_grh->hop_limit);
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memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
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}
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if (*isvlan)
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ah->av->valid |= OCRDMA_AV_VLAN_VALID;
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ah->av->valid = cpu_to_le32(ah->av->valid);
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return status;
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}
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int ocrdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
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struct ib_udata *udata)
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{
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u32 *ahid_addr;
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int status;
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struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
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bool isvlan = false;
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u16 vlan_tag = 0xffff;
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const struct ib_gid_attr *sgid_attr;
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struct ocrdma_pd *pd = get_ocrdma_pd(ibah->pd);
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struct rdma_ah_attr *attr = init_attr->ah_attr;
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struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
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if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
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!(rdma_ah_get_ah_flags(attr) & IB_AH_GRH))
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return -EINVAL;
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if (atomic_cmpxchg(&dev->update_sl, 1, 0))
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ocrdma_init_service_level(dev);
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sgid_attr = attr->grh.sgid_attr;
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status = rdma_read_gid_l2_fields(sgid_attr, &vlan_tag, NULL);
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if (status)
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return status;
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status = ocrdma_alloc_av(dev, ah);
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if (status)
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goto av_err;
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/* Get network header type for this GID */
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ah->hdr_type = rdma_gid_attr_network_type(sgid_attr);
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status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id,
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&isvlan, vlan_tag);
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if (status)
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goto av_conf_err;
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/* if pd is for the user process, pass the ah_id to user space */
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if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
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ahid_addr = pd->uctx->ah_tbl.va + rdma_ah_get_dlid(attr);
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*ahid_addr = 0;
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*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
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if (ocrdma_is_udp_encap_supported(dev)) {
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*ahid_addr |= ((u32)ah->hdr_type &
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OCRDMA_AH_L3_TYPE_MASK) <<
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OCRDMA_AH_L3_TYPE_SHIFT;
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}
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if (isvlan)
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*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
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OCRDMA_AH_VLAN_VALID_SHIFT);
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}
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return 0;
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av_conf_err:
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ocrdma_free_av(dev, ah);
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av_err:
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return status;
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}
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int ocrdma_destroy_ah(struct ib_ah *ibah, u32 flags)
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{
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struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
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struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
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ocrdma_free_av(dev, ah);
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return 0;
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}
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int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
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{
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struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
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struct ocrdma_av *av = ah->av;
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struct ocrdma_grh *grh;
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attr->type = ibah->type;
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if (ah->av->valid & OCRDMA_AV_VALID) {
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grh = (struct ocrdma_grh *)((u8 *)ah->av +
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sizeof(struct ocrdma_eth_vlan));
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rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13);
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} else {
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grh = (struct ocrdma_grh *)((u8 *)ah->av +
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sizeof(struct ocrdma_eth_basic));
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rdma_ah_set_sl(attr, 0);
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}
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rdma_ah_set_grh(attr, NULL,
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be32_to_cpu(grh->tclass_flow) & 0xffffffff,
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ah->sgid_index,
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be32_to_cpu(grh->pdid_hoplimit) & 0xff,
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be32_to_cpu(grh->tclass_flow) >> 24);
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rdma_ah_set_dgid_raw(attr, &grh->dgid[0]);
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return 0;
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}
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int ocrdma_process_mad(struct ib_device *ibdev, int process_mad_flags,
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u32 port_num, const struct ib_wc *in_wc,
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const struct ib_grh *in_grh, const struct ib_mad *in,
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struct ib_mad *out, size_t *out_mad_size,
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u16 *out_mad_pkey_index)
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{
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int status = IB_MAD_RESULT_SUCCESS;
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struct ocrdma_dev *dev;
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if (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT) {
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dev = get_ocrdma_dev(ibdev);
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ocrdma_pma_counters(dev, out);
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status |= IB_MAD_RESULT_REPLY;
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}
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return status;
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}
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