![Mark Zhang](/assets/img/avatar_default.png)
In auto mode all QPs belong to one category are bind automatically to a single counter set. Currently only "qp type" is supported. In this mode the qp counter is set in RST2INIT modification, and when a qp is destroyed the counter is unbound. Signed-off-by: Mark Zhang <markz@mellanox.com> Reviewed-by: Majd Dibbiny <majd@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2868 lines
76 KiB
C
2868 lines
76 KiB
C
/*
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* Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004 Intel Corporation. All rights reserved.
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004 Voltaire Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2005, 2006 Cisco Systems. 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/errno.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <net/addrconf.h>
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#include <linux/security.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_addr.h>
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#include <rdma/rw.h>
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#include "core_priv.h"
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static int ib_resolve_eth_dmac(struct ib_device *device,
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struct rdma_ah_attr *ah_attr);
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static const char * const ib_events[] = {
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[IB_EVENT_CQ_ERR] = "CQ error",
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[IB_EVENT_QP_FATAL] = "QP fatal error",
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[IB_EVENT_QP_REQ_ERR] = "QP request error",
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[IB_EVENT_QP_ACCESS_ERR] = "QP access error",
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[IB_EVENT_COMM_EST] = "communication established",
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[IB_EVENT_SQ_DRAINED] = "send queue drained",
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[IB_EVENT_PATH_MIG] = "path migration successful",
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[IB_EVENT_PATH_MIG_ERR] = "path migration error",
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[IB_EVENT_DEVICE_FATAL] = "device fatal error",
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[IB_EVENT_PORT_ACTIVE] = "port active",
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[IB_EVENT_PORT_ERR] = "port error",
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[IB_EVENT_LID_CHANGE] = "LID change",
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[IB_EVENT_PKEY_CHANGE] = "P_key change",
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[IB_EVENT_SM_CHANGE] = "SM change",
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[IB_EVENT_SRQ_ERR] = "SRQ error",
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[IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
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[IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
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[IB_EVENT_CLIENT_REREGISTER] = "client reregister",
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[IB_EVENT_GID_CHANGE] = "GID changed",
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};
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const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
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{
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size_t index = event;
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return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
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ib_events[index] : "unrecognized event";
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}
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EXPORT_SYMBOL(ib_event_msg);
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static const char * const wc_statuses[] = {
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[IB_WC_SUCCESS] = "success",
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[IB_WC_LOC_LEN_ERR] = "local length error",
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[IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
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[IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
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[IB_WC_LOC_PROT_ERR] = "local protection error",
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[IB_WC_WR_FLUSH_ERR] = "WR flushed",
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[IB_WC_MW_BIND_ERR] = "memory management operation error",
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[IB_WC_BAD_RESP_ERR] = "bad response error",
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[IB_WC_LOC_ACCESS_ERR] = "local access error",
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[IB_WC_REM_INV_REQ_ERR] = "invalid request error",
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[IB_WC_REM_ACCESS_ERR] = "remote access error",
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[IB_WC_REM_OP_ERR] = "remote operation error",
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[IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
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[IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
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[IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
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[IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
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[IB_WC_REM_ABORT_ERR] = "operation aborted",
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[IB_WC_INV_EECN_ERR] = "invalid EE context number",
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[IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
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[IB_WC_FATAL_ERR] = "fatal error",
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[IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
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[IB_WC_GENERAL_ERR] = "general error",
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};
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const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
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{
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size_t index = status;
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return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
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wc_statuses[index] : "unrecognized status";
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}
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EXPORT_SYMBOL(ib_wc_status_msg);
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__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
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{
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switch (rate) {
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case IB_RATE_2_5_GBPS: return 1;
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case IB_RATE_5_GBPS: return 2;
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case IB_RATE_10_GBPS: return 4;
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case IB_RATE_20_GBPS: return 8;
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case IB_RATE_30_GBPS: return 12;
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case IB_RATE_40_GBPS: return 16;
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case IB_RATE_60_GBPS: return 24;
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case IB_RATE_80_GBPS: return 32;
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case IB_RATE_120_GBPS: return 48;
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case IB_RATE_14_GBPS: return 6;
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case IB_RATE_56_GBPS: return 22;
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case IB_RATE_112_GBPS: return 45;
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case IB_RATE_168_GBPS: return 67;
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case IB_RATE_25_GBPS: return 10;
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case IB_RATE_100_GBPS: return 40;
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case IB_RATE_200_GBPS: return 80;
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case IB_RATE_300_GBPS: return 120;
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case IB_RATE_28_GBPS: return 11;
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case IB_RATE_50_GBPS: return 20;
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case IB_RATE_400_GBPS: return 160;
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case IB_RATE_600_GBPS: return 240;
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default: return -1;
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}
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}
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EXPORT_SYMBOL(ib_rate_to_mult);
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__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
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{
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switch (mult) {
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case 1: return IB_RATE_2_5_GBPS;
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case 2: return IB_RATE_5_GBPS;
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case 4: return IB_RATE_10_GBPS;
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case 8: return IB_RATE_20_GBPS;
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case 12: return IB_RATE_30_GBPS;
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case 16: return IB_RATE_40_GBPS;
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case 24: return IB_RATE_60_GBPS;
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case 32: return IB_RATE_80_GBPS;
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case 48: return IB_RATE_120_GBPS;
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case 6: return IB_RATE_14_GBPS;
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case 22: return IB_RATE_56_GBPS;
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case 45: return IB_RATE_112_GBPS;
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case 67: return IB_RATE_168_GBPS;
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case 10: return IB_RATE_25_GBPS;
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case 40: return IB_RATE_100_GBPS;
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case 80: return IB_RATE_200_GBPS;
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case 120: return IB_RATE_300_GBPS;
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case 11: return IB_RATE_28_GBPS;
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case 20: return IB_RATE_50_GBPS;
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case 160: return IB_RATE_400_GBPS;
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case 240: return IB_RATE_600_GBPS;
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default: return IB_RATE_PORT_CURRENT;
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}
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}
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EXPORT_SYMBOL(mult_to_ib_rate);
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__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
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{
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switch (rate) {
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case IB_RATE_2_5_GBPS: return 2500;
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case IB_RATE_5_GBPS: return 5000;
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case IB_RATE_10_GBPS: return 10000;
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case IB_RATE_20_GBPS: return 20000;
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case IB_RATE_30_GBPS: return 30000;
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case IB_RATE_40_GBPS: return 40000;
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case IB_RATE_60_GBPS: return 60000;
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case IB_RATE_80_GBPS: return 80000;
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case IB_RATE_120_GBPS: return 120000;
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case IB_RATE_14_GBPS: return 14062;
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case IB_RATE_56_GBPS: return 56250;
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case IB_RATE_112_GBPS: return 112500;
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case IB_RATE_168_GBPS: return 168750;
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case IB_RATE_25_GBPS: return 25781;
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case IB_RATE_100_GBPS: return 103125;
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case IB_RATE_200_GBPS: return 206250;
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case IB_RATE_300_GBPS: return 309375;
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case IB_RATE_28_GBPS: return 28125;
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case IB_RATE_50_GBPS: return 53125;
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case IB_RATE_400_GBPS: return 425000;
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case IB_RATE_600_GBPS: return 637500;
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default: return -1;
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}
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}
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EXPORT_SYMBOL(ib_rate_to_mbps);
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__attribute_const__ enum rdma_transport_type
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rdma_node_get_transport(unsigned int node_type)
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{
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if (node_type == RDMA_NODE_USNIC)
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return RDMA_TRANSPORT_USNIC;
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if (node_type == RDMA_NODE_USNIC_UDP)
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return RDMA_TRANSPORT_USNIC_UDP;
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if (node_type == RDMA_NODE_RNIC)
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return RDMA_TRANSPORT_IWARP;
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if (node_type == RDMA_NODE_UNSPECIFIED)
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return RDMA_TRANSPORT_UNSPECIFIED;
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return RDMA_TRANSPORT_IB;
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}
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EXPORT_SYMBOL(rdma_node_get_transport);
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enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
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{
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enum rdma_transport_type lt;
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if (device->ops.get_link_layer)
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return device->ops.get_link_layer(device, port_num);
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lt = rdma_node_get_transport(device->node_type);
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if (lt == RDMA_TRANSPORT_IB)
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return IB_LINK_LAYER_INFINIBAND;
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return IB_LINK_LAYER_ETHERNET;
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}
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EXPORT_SYMBOL(rdma_port_get_link_layer);
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/* Protection domains */
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/**
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* ib_alloc_pd - Allocates an unused protection domain.
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* @device: The device on which to allocate the protection domain.
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*
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* A protection domain object provides an association between QPs, shared
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* receive queues, address handles, memory regions, and memory windows.
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*
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* Every PD has a local_dma_lkey which can be used as the lkey value for local
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* memory operations.
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*/
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struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
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const char *caller)
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{
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struct ib_pd *pd;
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int mr_access_flags = 0;
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int ret;
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pd = rdma_zalloc_drv_obj(device, ib_pd);
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if (!pd)
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return ERR_PTR(-ENOMEM);
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pd->device = device;
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pd->uobject = NULL;
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pd->__internal_mr = NULL;
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atomic_set(&pd->usecnt, 0);
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pd->flags = flags;
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pd->res.type = RDMA_RESTRACK_PD;
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rdma_restrack_set_task(&pd->res, caller);
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ret = device->ops.alloc_pd(pd, NULL);
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if (ret) {
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kfree(pd);
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return ERR_PTR(ret);
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}
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rdma_restrack_kadd(&pd->res);
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if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
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pd->local_dma_lkey = device->local_dma_lkey;
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else
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mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
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if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
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pr_warn("%s: enabling unsafe global rkey\n", caller);
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mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
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}
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if (mr_access_flags) {
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struct ib_mr *mr;
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mr = pd->device->ops.get_dma_mr(pd, mr_access_flags);
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if (IS_ERR(mr)) {
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ib_dealloc_pd(pd);
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return ERR_CAST(mr);
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}
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mr->device = pd->device;
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mr->pd = pd;
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mr->type = IB_MR_TYPE_DMA;
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mr->uobject = NULL;
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mr->need_inval = false;
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pd->__internal_mr = mr;
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if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
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pd->local_dma_lkey = pd->__internal_mr->lkey;
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if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
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pd->unsafe_global_rkey = pd->__internal_mr->rkey;
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}
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return pd;
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}
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EXPORT_SYMBOL(__ib_alloc_pd);
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/**
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* ib_dealloc_pd_user - Deallocates a protection domain.
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* @pd: The protection domain to deallocate.
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* @udata: Valid user data or NULL for kernel object
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*
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* It is an error to call this function while any resources in the pd still
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* exist. The caller is responsible to synchronously destroy them and
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* guarantee no new allocations will happen.
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*/
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void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
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{
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int ret;
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if (pd->__internal_mr) {
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ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL);
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WARN_ON(ret);
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pd->__internal_mr = NULL;
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}
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/* uverbs manipulates usecnt with proper locking, while the kabi
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requires the caller to guarantee we can't race here. */
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WARN_ON(atomic_read(&pd->usecnt));
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rdma_restrack_del(&pd->res);
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pd->device->ops.dealloc_pd(pd, udata);
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kfree(pd);
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}
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EXPORT_SYMBOL(ib_dealloc_pd_user);
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/* Address handles */
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/**
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* rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
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* @dest: Pointer to destination ah_attr. Contents of the destination
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* pointer is assumed to be invalid and attribute are overwritten.
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* @src: Pointer to source ah_attr.
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*/
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void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
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const struct rdma_ah_attr *src)
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{
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*dest = *src;
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if (dest->grh.sgid_attr)
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rdma_hold_gid_attr(dest->grh.sgid_attr);
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}
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EXPORT_SYMBOL(rdma_copy_ah_attr);
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/**
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* rdma_replace_ah_attr - Replace valid ah_attr with new new one.
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* @old: Pointer to existing ah_attr which needs to be replaced.
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* old is assumed to be valid or zero'd
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* @new: Pointer to the new ah_attr.
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*
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* rdma_replace_ah_attr() first releases any reference in the old ah_attr if
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* old the ah_attr is valid; after that it copies the new attribute and holds
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* the reference to the replaced ah_attr.
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*/
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void rdma_replace_ah_attr(struct rdma_ah_attr *old,
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const struct rdma_ah_attr *new)
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{
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rdma_destroy_ah_attr(old);
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*old = *new;
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if (old->grh.sgid_attr)
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rdma_hold_gid_attr(old->grh.sgid_attr);
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}
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EXPORT_SYMBOL(rdma_replace_ah_attr);
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/**
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* rdma_move_ah_attr - Move ah_attr pointed by source to destination.
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* @dest: Pointer to destination ah_attr to copy to.
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* dest is assumed to be valid or zero'd
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* @src: Pointer to the new ah_attr.
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*
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* rdma_move_ah_attr() first releases any reference in the destination ah_attr
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* if it is valid. This also transfers ownership of internal references from
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* src to dest, making src invalid in the process. No new reference of the src
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* ah_attr is taken.
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*/
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void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
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{
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rdma_destroy_ah_attr(dest);
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*dest = *src;
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src->grh.sgid_attr = NULL;
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}
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EXPORT_SYMBOL(rdma_move_ah_attr);
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/*
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* Validate that the rdma_ah_attr is valid for the device before passing it
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* off to the driver.
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*/
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static int rdma_check_ah_attr(struct ib_device *device,
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struct rdma_ah_attr *ah_attr)
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{
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if (!rdma_is_port_valid(device, ah_attr->port_num))
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return -EINVAL;
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if ((rdma_is_grh_required(device, ah_attr->port_num) ||
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ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&
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!(ah_attr->ah_flags & IB_AH_GRH))
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return -EINVAL;
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if (ah_attr->grh.sgid_attr) {
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/*
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* Make sure the passed sgid_attr is consistent with the
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* parameters
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*/
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if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
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ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
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return -EINVAL;
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}
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return 0;
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}
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/*
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* If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
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* On success the caller is responsible to call rdma_unfill_sgid_attr().
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*/
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static int rdma_fill_sgid_attr(struct ib_device *device,
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struct rdma_ah_attr *ah_attr,
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const struct ib_gid_attr **old_sgid_attr)
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{
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const struct ib_gid_attr *sgid_attr;
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struct ib_global_route *grh;
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int ret;
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*old_sgid_attr = ah_attr->grh.sgid_attr;
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|
|
ret = rdma_check_ah_attr(device, ah_attr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!(ah_attr->ah_flags & IB_AH_GRH))
|
|
return 0;
|
|
|
|
grh = rdma_ah_retrieve_grh(ah_attr);
|
|
if (grh->sgid_attr)
|
|
return 0;
|
|
|
|
sgid_attr =
|
|
rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);
|
|
if (IS_ERR(sgid_attr))
|
|
return PTR_ERR(sgid_attr);
|
|
|
|
/* Move ownerhip of the kref into the ah_attr */
|
|
grh->sgid_attr = sgid_attr;
|
|
return 0;
|
|
}
|
|
|
|
static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,
|
|
const struct ib_gid_attr *old_sgid_attr)
|
|
{
|
|
/*
|
|
* Fill didn't change anything, the caller retains ownership of
|
|
* whatever it passed
|
|
*/
|
|
if (ah_attr->grh.sgid_attr == old_sgid_attr)
|
|
return;
|
|
|
|
/*
|
|
* Otherwise, we need to undo what rdma_fill_sgid_attr so the caller
|
|
* doesn't see any change in the rdma_ah_attr. If we get here
|
|
* old_sgid_attr is NULL.
|
|
*/
|
|
rdma_destroy_ah_attr(ah_attr);
|
|
}
|
|
|
|
static const struct ib_gid_attr *
|
|
rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
|
|
const struct ib_gid_attr *old_attr)
|
|
{
|
|
if (old_attr)
|
|
rdma_put_gid_attr(old_attr);
|
|
if (ah_attr->ah_flags & IB_AH_GRH) {
|
|
rdma_hold_gid_attr(ah_attr->grh.sgid_attr);
|
|
return ah_attr->grh.sgid_attr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
|
|
struct rdma_ah_attr *ah_attr,
|
|
u32 flags,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct ib_device *device = pd->device;
|
|
struct ib_ah *ah;
|
|
int ret;
|
|
|
|
might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
|
|
|
|
if (!device->ops.create_ah)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
ah = rdma_zalloc_drv_obj_gfp(
|
|
device, ib_ah,
|
|
(flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);
|
|
if (!ah)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ah->device = device;
|
|
ah->pd = pd;
|
|
ah->type = ah_attr->type;
|
|
ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);
|
|
|
|
ret = device->ops.create_ah(ah, ah_attr, flags, udata);
|
|
if (ret) {
|
|
kfree(ah);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
atomic_inc(&pd->usecnt);
|
|
return ah;
|
|
}
|
|
|
|
/**
|
|
* rdma_create_ah - Creates an address handle for the
|
|
* given address vector.
|
|
* @pd: The protection domain associated with the address handle.
|
|
* @ah_attr: The attributes of the address vector.
|
|
* @flags: Create address handle flags (see enum rdma_create_ah_flags).
|
|
*
|
|
* It returns 0 on success and returns appropriate error code on error.
|
|
* The address handle is used to reference a local or global destination
|
|
* in all UD QP post sends.
|
|
*/
|
|
struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
|
|
u32 flags)
|
|
{
|
|
const struct ib_gid_attr *old_sgid_attr;
|
|
struct ib_ah *ah;
|
|
int ret;
|
|
|
|
ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
ah = _rdma_create_ah(pd, ah_attr, flags, NULL);
|
|
|
|
rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
|
|
return ah;
|
|
}
|
|
EXPORT_SYMBOL(rdma_create_ah);
|
|
|
|
/**
|
|
* rdma_create_user_ah - Creates an address handle for the
|
|
* given address vector.
|
|
* It resolves destination mac address for ah attribute of RoCE type.
|
|
* @pd: The protection domain associated with the address handle.
|
|
* @ah_attr: The attributes of the address vector.
|
|
* @udata: pointer to user's input output buffer information need by
|
|
* provider driver.
|
|
*
|
|
* It returns 0 on success and returns appropriate error code on error.
|
|
* The address handle is used to reference a local or global destination
|
|
* in all UD QP post sends.
|
|
*/
|
|
struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
|
|
struct rdma_ah_attr *ah_attr,
|
|
struct ib_udata *udata)
|
|
{
|
|
const struct ib_gid_attr *old_sgid_attr;
|
|
struct ib_ah *ah;
|
|
int err;
|
|
|
|
err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
|
|
err = ib_resolve_eth_dmac(pd->device, ah_attr);
|
|
if (err) {
|
|
ah = ERR_PTR(err);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE, udata);
|
|
|
|
out:
|
|
rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
|
|
return ah;
|
|
}
|
|
EXPORT_SYMBOL(rdma_create_user_ah);
|
|
|
|
int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
|
|
{
|
|
const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
|
|
struct iphdr ip4h_checked;
|
|
const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
|
|
|
|
/* If it's IPv6, the version must be 6, otherwise, the first
|
|
* 20 bytes (before the IPv4 header) are garbled.
|
|
*/
|
|
if (ip6h->version != 6)
|
|
return (ip4h->version == 4) ? 4 : 0;
|
|
/* version may be 6 or 4 because the first 20 bytes could be garbled */
|
|
|
|
/* RoCE v2 requires no options, thus header length
|
|
* must be 5 words
|
|
*/
|
|
if (ip4h->ihl != 5)
|
|
return 6;
|
|
|
|
/* Verify checksum.
|
|
* We can't write on scattered buffers so we need to copy to
|
|
* temp buffer.
|
|
*/
|
|
memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
|
|
ip4h_checked.check = 0;
|
|
ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
|
|
/* if IPv4 header checksum is OK, believe it */
|
|
if (ip4h->check == ip4h_checked.check)
|
|
return 4;
|
|
return 6;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_rdma_header_version);
|
|
|
|
static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
|
|
u8 port_num,
|
|
const struct ib_grh *grh)
|
|
{
|
|
int grh_version;
|
|
|
|
if (rdma_protocol_ib(device, port_num))
|
|
return RDMA_NETWORK_IB;
|
|
|
|
grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
|
|
|
|
if (grh_version == 4)
|
|
return RDMA_NETWORK_IPV4;
|
|
|
|
if (grh->next_hdr == IPPROTO_UDP)
|
|
return RDMA_NETWORK_IPV6;
|
|
|
|
return RDMA_NETWORK_ROCE_V1;
|
|
}
|
|
|
|
struct find_gid_index_context {
|
|
u16 vlan_id;
|
|
enum ib_gid_type gid_type;
|
|
};
|
|
|
|
static bool find_gid_index(const union ib_gid *gid,
|
|
const struct ib_gid_attr *gid_attr,
|
|
void *context)
|
|
{
|
|
struct find_gid_index_context *ctx = context;
|
|
|
|
if (ctx->gid_type != gid_attr->gid_type)
|
|
return false;
|
|
|
|
if ((!!(ctx->vlan_id != 0xffff) == !is_vlan_dev(gid_attr->ndev)) ||
|
|
(is_vlan_dev(gid_attr->ndev) &&
|
|
vlan_dev_vlan_id(gid_attr->ndev) != ctx->vlan_id))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static const struct ib_gid_attr *
|
|
get_sgid_attr_from_eth(struct ib_device *device, u8 port_num,
|
|
u16 vlan_id, const union ib_gid *sgid,
|
|
enum ib_gid_type gid_type)
|
|
{
|
|
struct find_gid_index_context context = {.vlan_id = vlan_id,
|
|
.gid_type = gid_type};
|
|
|
|
return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
|
|
&context);
|
|
}
|
|
|
|
int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
|
|
enum rdma_network_type net_type,
|
|
union ib_gid *sgid, union ib_gid *dgid)
|
|
{
|
|
struct sockaddr_in src_in;
|
|
struct sockaddr_in dst_in;
|
|
__be32 src_saddr, dst_saddr;
|
|
|
|
if (!sgid || !dgid)
|
|
return -EINVAL;
|
|
|
|
if (net_type == RDMA_NETWORK_IPV4) {
|
|
memcpy(&src_in.sin_addr.s_addr,
|
|
&hdr->roce4grh.saddr, 4);
|
|
memcpy(&dst_in.sin_addr.s_addr,
|
|
&hdr->roce4grh.daddr, 4);
|
|
src_saddr = src_in.sin_addr.s_addr;
|
|
dst_saddr = dst_in.sin_addr.s_addr;
|
|
ipv6_addr_set_v4mapped(src_saddr,
|
|
(struct in6_addr *)sgid);
|
|
ipv6_addr_set_v4mapped(dst_saddr,
|
|
(struct in6_addr *)dgid);
|
|
return 0;
|
|
} else if (net_type == RDMA_NETWORK_IPV6 ||
|
|
net_type == RDMA_NETWORK_IB) {
|
|
*dgid = hdr->ibgrh.dgid;
|
|
*sgid = hdr->ibgrh.sgid;
|
|
return 0;
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
|
|
|
|
/* Resolve destination mac address and hop limit for unicast destination
|
|
* GID entry, considering the source GID entry as well.
|
|
* ah_attribute must have have valid port_num, sgid_index.
|
|
*/
|
|
static int ib_resolve_unicast_gid_dmac(struct ib_device *device,
|
|
struct rdma_ah_attr *ah_attr)
|
|
{
|
|
struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
|
|
const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
|
|
int hop_limit = 0xff;
|
|
int ret = 0;
|
|
|
|
/* If destination is link local and source GID is RoCEv1,
|
|
* IP stack is not used.
|
|
*/
|
|
if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&
|
|
sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
|
|
rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
|
|
ah_attr->roce.dmac);
|
|
return ret;
|
|
}
|
|
|
|
ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
|
|
ah_attr->roce.dmac,
|
|
sgid_attr, &hop_limit);
|
|
|
|
grh->hop_limit = hop_limit;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This function initializes address handle attributes from the incoming packet.
|
|
* Incoming packet has dgid of the receiver node on which this code is
|
|
* getting executed and, sgid contains the GID of the sender.
|
|
*
|
|
* When resolving mac address of destination, the arrived dgid is used
|
|
* as sgid and, sgid is used as dgid because sgid contains destinations
|
|
* GID whom to respond to.
|
|
*
|
|
* On success the caller is responsible to call rdma_destroy_ah_attr on the
|
|
* attr.
|
|
*/
|
|
int ib_init_ah_attr_from_wc(struct ib_device *device, u8 port_num,
|
|
const struct ib_wc *wc, const struct ib_grh *grh,
|
|
struct rdma_ah_attr *ah_attr)
|
|
{
|
|
u32 flow_class;
|
|
int ret;
|
|
enum rdma_network_type net_type = RDMA_NETWORK_IB;
|
|
enum ib_gid_type gid_type = IB_GID_TYPE_IB;
|
|
const struct ib_gid_attr *sgid_attr;
|
|
int hoplimit = 0xff;
|
|
union ib_gid dgid;
|
|
union ib_gid sgid;
|
|
|
|
might_sleep();
|
|
|
|
memset(ah_attr, 0, sizeof *ah_attr);
|
|
ah_attr->type = rdma_ah_find_type(device, port_num);
|
|
if (rdma_cap_eth_ah(device, port_num)) {
|
|
if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
|
|
net_type = wc->network_hdr_type;
|
|
else
|
|
net_type = ib_get_net_type_by_grh(device, port_num, grh);
|
|
gid_type = ib_network_to_gid_type(net_type);
|
|
}
|
|
ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
|
|
&sgid, &dgid);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rdma_ah_set_sl(ah_attr, wc->sl);
|
|
rdma_ah_set_port_num(ah_attr, port_num);
|
|
|
|
if (rdma_protocol_roce(device, port_num)) {
|
|
u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
|
|
wc->vlan_id : 0xffff;
|
|
|
|
if (!(wc->wc_flags & IB_WC_GRH))
|
|
return -EPROTOTYPE;
|
|
|
|
sgid_attr = get_sgid_attr_from_eth(device, port_num,
|
|
vlan_id, &dgid,
|
|
gid_type);
|
|
if (IS_ERR(sgid_attr))
|
|
return PTR_ERR(sgid_attr);
|
|
|
|
flow_class = be32_to_cpu(grh->version_tclass_flow);
|
|
rdma_move_grh_sgid_attr(ah_attr,
|
|
&sgid,
|
|
flow_class & 0xFFFFF,
|
|
hoplimit,
|
|
(flow_class >> 20) & 0xFF,
|
|
sgid_attr);
|
|
|
|
ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
|
|
if (ret)
|
|
rdma_destroy_ah_attr(ah_attr);
|
|
|
|
return ret;
|
|
} else {
|
|
rdma_ah_set_dlid(ah_attr, wc->slid);
|
|
rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
|
|
|
|
if ((wc->wc_flags & IB_WC_GRH) == 0)
|
|
return 0;
|
|
|
|
if (dgid.global.interface_id !=
|
|
cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
|
|
sgid_attr = rdma_find_gid_by_port(
|
|
device, &dgid, IB_GID_TYPE_IB, port_num, NULL);
|
|
} else
|
|
sgid_attr = rdma_get_gid_attr(device, port_num, 0);
|
|
|
|
if (IS_ERR(sgid_attr))
|
|
return PTR_ERR(sgid_attr);
|
|
flow_class = be32_to_cpu(grh->version_tclass_flow);
|
|
rdma_move_grh_sgid_attr(ah_attr,
|
|
&sgid,
|
|
flow_class & 0xFFFFF,
|
|
hoplimit,
|
|
(flow_class >> 20) & 0xFF,
|
|
sgid_attr);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
|
|
|
|
/**
|
|
* rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership
|
|
* of the reference
|
|
*
|
|
* @attr: Pointer to AH attribute structure
|
|
* @dgid: Destination GID
|
|
* @flow_label: Flow label
|
|
* @hop_limit: Hop limit
|
|
* @traffic_class: traffic class
|
|
* @sgid_attr: Pointer to SGID attribute
|
|
*
|
|
* This takes ownership of the sgid_attr reference. The caller must ensure
|
|
* rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after
|
|
* calling this function.
|
|
*/
|
|
void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
|
|
u32 flow_label, u8 hop_limit, u8 traffic_class,
|
|
const struct ib_gid_attr *sgid_attr)
|
|
{
|
|
rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,
|
|
traffic_class);
|
|
attr->grh.sgid_attr = sgid_attr;
|
|
}
|
|
EXPORT_SYMBOL(rdma_move_grh_sgid_attr);
|
|
|
|
/**
|
|
* rdma_destroy_ah_attr - Release reference to SGID attribute of
|
|
* ah attribute.
|
|
* @ah_attr: Pointer to ah attribute
|
|
*
|
|
* Release reference to the SGID attribute of the ah attribute if it is
|
|
* non NULL. It is safe to call this multiple times, and safe to call it on
|
|
* a zero initialized ah_attr.
|
|
*/
|
|
void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)
|
|
{
|
|
if (ah_attr->grh.sgid_attr) {
|
|
rdma_put_gid_attr(ah_attr->grh.sgid_attr);
|
|
ah_attr->grh.sgid_attr = NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_ah_attr);
|
|
|
|
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
|
|
const struct ib_grh *grh, u8 port_num)
|
|
{
|
|
struct rdma_ah_attr ah_attr;
|
|
struct ib_ah *ah;
|
|
int ret;
|
|
|
|
ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
|
|
|
|
rdma_destroy_ah_attr(&ah_attr);
|
|
return ah;
|
|
}
|
|
EXPORT_SYMBOL(ib_create_ah_from_wc);
|
|
|
|
int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
|
|
{
|
|
const struct ib_gid_attr *old_sgid_attr;
|
|
int ret;
|
|
|
|
if (ah->type != ah_attr->type)
|
|
return -EINVAL;
|
|
|
|
ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ah->device->ops.modify_ah ?
|
|
ah->device->ops.modify_ah(ah, ah_attr) :
|
|
-EOPNOTSUPP;
|
|
|
|
ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
|
|
rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_modify_ah);
|
|
|
|
int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
|
|
{
|
|
ah_attr->grh.sgid_attr = NULL;
|
|
|
|
return ah->device->ops.query_ah ?
|
|
ah->device->ops.query_ah(ah, ah_attr) :
|
|
-EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(rdma_query_ah);
|
|
|
|
int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)
|
|
{
|
|
const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
|
|
struct ib_pd *pd;
|
|
|
|
might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);
|
|
|
|
pd = ah->pd;
|
|
|
|
ah->device->ops.destroy_ah(ah, flags);
|
|
atomic_dec(&pd->usecnt);
|
|
if (sgid_attr)
|
|
rdma_put_gid_attr(sgid_attr);
|
|
|
|
kfree(ah);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_ah_user);
|
|
|
|
/* Shared receive queues */
|
|
|
|
struct ib_srq *ib_create_srq(struct ib_pd *pd,
|
|
struct ib_srq_init_attr *srq_init_attr)
|
|
{
|
|
struct ib_srq *srq;
|
|
int ret;
|
|
|
|
if (!pd->device->ops.create_srq)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
srq = rdma_zalloc_drv_obj(pd->device, ib_srq);
|
|
if (!srq)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
srq->device = pd->device;
|
|
srq->pd = pd;
|
|
srq->event_handler = srq_init_attr->event_handler;
|
|
srq->srq_context = srq_init_attr->srq_context;
|
|
srq->srq_type = srq_init_attr->srq_type;
|
|
|
|
if (ib_srq_has_cq(srq->srq_type)) {
|
|
srq->ext.cq = srq_init_attr->ext.cq;
|
|
atomic_inc(&srq->ext.cq->usecnt);
|
|
}
|
|
if (srq->srq_type == IB_SRQT_XRC) {
|
|
srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
|
|
atomic_inc(&srq->ext.xrc.xrcd->usecnt);
|
|
}
|
|
atomic_inc(&pd->usecnt);
|
|
|
|
ret = pd->device->ops.create_srq(srq, srq_init_attr, NULL);
|
|
if (ret) {
|
|
atomic_dec(&srq->pd->usecnt);
|
|
if (srq->srq_type == IB_SRQT_XRC)
|
|
atomic_dec(&srq->ext.xrc.xrcd->usecnt);
|
|
if (ib_srq_has_cq(srq->srq_type))
|
|
atomic_dec(&srq->ext.cq->usecnt);
|
|
kfree(srq);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
return srq;
|
|
}
|
|
EXPORT_SYMBOL(ib_create_srq);
|
|
|
|
int ib_modify_srq(struct ib_srq *srq,
|
|
struct ib_srq_attr *srq_attr,
|
|
enum ib_srq_attr_mask srq_attr_mask)
|
|
{
|
|
return srq->device->ops.modify_srq ?
|
|
srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask,
|
|
NULL) : -EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_srq);
|
|
|
|
int ib_query_srq(struct ib_srq *srq,
|
|
struct ib_srq_attr *srq_attr)
|
|
{
|
|
return srq->device->ops.query_srq ?
|
|
srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(ib_query_srq);
|
|
|
|
int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)
|
|
{
|
|
if (atomic_read(&srq->usecnt))
|
|
return -EBUSY;
|
|
|
|
srq->device->ops.destroy_srq(srq, udata);
|
|
|
|
atomic_dec(&srq->pd->usecnt);
|
|
if (srq->srq_type == IB_SRQT_XRC)
|
|
atomic_dec(&srq->ext.xrc.xrcd->usecnt);
|
|
if (ib_srq_has_cq(srq->srq_type))
|
|
atomic_dec(&srq->ext.cq->usecnt);
|
|
kfree(srq);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_srq_user);
|
|
|
|
/* Queue pairs */
|
|
|
|
static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
|
|
{
|
|
struct ib_qp *qp = context;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&qp->device->event_handler_lock, flags);
|
|
list_for_each_entry(event->element.qp, &qp->open_list, open_list)
|
|
if (event->element.qp->event_handler)
|
|
event->element.qp->event_handler(event, event->element.qp->qp_context);
|
|
spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
|
|
}
|
|
|
|
static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
|
|
{
|
|
mutex_lock(&xrcd->tgt_qp_mutex);
|
|
list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
|
|
mutex_unlock(&xrcd->tgt_qp_mutex);
|
|
}
|
|
|
|
static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
|
|
void (*event_handler)(struct ib_event *, void *),
|
|
void *qp_context)
|
|
{
|
|
struct ib_qp *qp;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
qp = kzalloc(sizeof *qp, GFP_KERNEL);
|
|
if (!qp)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
qp->real_qp = real_qp;
|
|
err = ib_open_shared_qp_security(qp, real_qp->device);
|
|
if (err) {
|
|
kfree(qp);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
qp->real_qp = real_qp;
|
|
atomic_inc(&real_qp->usecnt);
|
|
qp->device = real_qp->device;
|
|
qp->event_handler = event_handler;
|
|
qp->qp_context = qp_context;
|
|
qp->qp_num = real_qp->qp_num;
|
|
qp->qp_type = real_qp->qp_type;
|
|
|
|
spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
|
|
list_add(&qp->open_list, &real_qp->open_list);
|
|
spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
|
|
|
|
return qp;
|
|
}
|
|
|
|
struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
|
|
struct ib_qp_open_attr *qp_open_attr)
|
|
{
|
|
struct ib_qp *qp, *real_qp;
|
|
|
|
if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
qp = ERR_PTR(-EINVAL);
|
|
mutex_lock(&xrcd->tgt_qp_mutex);
|
|
list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
|
|
if (real_qp->qp_num == qp_open_attr->qp_num) {
|
|
qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
|
|
qp_open_attr->qp_context);
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&xrcd->tgt_qp_mutex);
|
|
return qp;
|
|
}
|
|
EXPORT_SYMBOL(ib_open_qp);
|
|
|
|
static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,
|
|
struct ib_qp_init_attr *qp_init_attr,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct ib_qp *real_qp = qp;
|
|
|
|
qp->event_handler = __ib_shared_qp_event_handler;
|
|
qp->qp_context = qp;
|
|
qp->pd = NULL;
|
|
qp->send_cq = qp->recv_cq = NULL;
|
|
qp->srq = NULL;
|
|
qp->xrcd = qp_init_attr->xrcd;
|
|
atomic_inc(&qp_init_attr->xrcd->usecnt);
|
|
INIT_LIST_HEAD(&qp->open_list);
|
|
|
|
qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
|
|
qp_init_attr->qp_context);
|
|
if (IS_ERR(qp))
|
|
return qp;
|
|
|
|
__ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
|
|
return qp;
|
|
}
|
|
|
|
struct ib_qp *ib_create_qp_user(struct ib_pd *pd,
|
|
struct ib_qp_init_attr *qp_init_attr,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
|
|
struct ib_qp *qp;
|
|
int ret;
|
|
|
|
if (qp_init_attr->rwq_ind_tbl &&
|
|
(qp_init_attr->recv_cq ||
|
|
qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
|
|
qp_init_attr->cap.max_recv_sge))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if ((qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) &&
|
|
!(device->attrs.device_cap_flags & IB_DEVICE_INTEGRITY_HANDOVER))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/*
|
|
* If the callers is using the RDMA API calculate the resources
|
|
* needed for the RDMA READ/WRITE operations.
|
|
*
|
|
* Note that these callers need to pass in a port number.
|
|
*/
|
|
if (qp_init_attr->cap.max_rdma_ctxs)
|
|
rdma_rw_init_qp(device, qp_init_attr);
|
|
|
|
qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL);
|
|
if (IS_ERR(qp))
|
|
return qp;
|
|
|
|
ret = ib_create_qp_security(qp, device);
|
|
if (ret)
|
|
goto err;
|
|
|
|
qp->qp_type = qp_init_attr->qp_type;
|
|
qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
|
|
|
|
atomic_set(&qp->usecnt, 0);
|
|
qp->mrs_used = 0;
|
|
spin_lock_init(&qp->mr_lock);
|
|
INIT_LIST_HEAD(&qp->rdma_mrs);
|
|
INIT_LIST_HEAD(&qp->sig_mrs);
|
|
qp->port = 0;
|
|
|
|
if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
|
|
struct ib_qp *xrc_qp =
|
|
create_xrc_qp_user(qp, qp_init_attr, udata);
|
|
|
|
if (IS_ERR(xrc_qp)) {
|
|
ret = PTR_ERR(xrc_qp);
|
|
goto err;
|
|
}
|
|
return xrc_qp;
|
|
}
|
|
|
|
qp->event_handler = qp_init_attr->event_handler;
|
|
qp->qp_context = qp_init_attr->qp_context;
|
|
if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
|
|
qp->recv_cq = NULL;
|
|
qp->srq = NULL;
|
|
} else {
|
|
qp->recv_cq = qp_init_attr->recv_cq;
|
|
if (qp_init_attr->recv_cq)
|
|
atomic_inc(&qp_init_attr->recv_cq->usecnt);
|
|
qp->srq = qp_init_attr->srq;
|
|
if (qp->srq)
|
|
atomic_inc(&qp_init_attr->srq->usecnt);
|
|
}
|
|
|
|
qp->send_cq = qp_init_attr->send_cq;
|
|
qp->xrcd = NULL;
|
|
|
|
atomic_inc(&pd->usecnt);
|
|
if (qp_init_attr->send_cq)
|
|
atomic_inc(&qp_init_attr->send_cq->usecnt);
|
|
if (qp_init_attr->rwq_ind_tbl)
|
|
atomic_inc(&qp->rwq_ind_tbl->usecnt);
|
|
|
|
if (qp_init_attr->cap.max_rdma_ctxs) {
|
|
ret = rdma_rw_init_mrs(qp, qp_init_attr);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Note: all hw drivers guarantee that max_send_sge is lower than
|
|
* the device RDMA WRITE SGE limit but not all hw drivers ensure that
|
|
* max_send_sge <= max_sge_rd.
|
|
*/
|
|
qp->max_write_sge = qp_init_attr->cap.max_send_sge;
|
|
qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
|
|
device->attrs.max_sge_rd);
|
|
if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN)
|
|
qp->integrity_en = true;
|
|
|
|
return qp;
|
|
|
|
err:
|
|
ib_destroy_qp(qp);
|
|
return ERR_PTR(ret);
|
|
|
|
}
|
|
EXPORT_SYMBOL(ib_create_qp_user);
|
|
|
|
static const struct {
|
|
int valid;
|
|
enum ib_qp_attr_mask req_param[IB_QPT_MAX];
|
|
enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
|
|
} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
|
|
[IB_QPS_RESET] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_INIT] = {
|
|
.valid = 1,
|
|
.req_param = {
|
|
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_RAW_PACKET] = IB_QP_PORT,
|
|
[IB_QPT_UC] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_RC] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
}
|
|
},
|
|
},
|
|
[IB_QPS_INIT] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 },
|
|
[IB_QPS_INIT] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_RC] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_PORT |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
}
|
|
},
|
|
[IB_QPS_RTR] = {
|
|
.valid = 1,
|
|
.req_param = {
|
|
[IB_QPT_UC] = (IB_QP_AV |
|
|
IB_QP_PATH_MTU |
|
|
IB_QP_DEST_QPN |
|
|
IB_QP_RQ_PSN),
|
|
[IB_QPT_RC] = (IB_QP_AV |
|
|
IB_QP_PATH_MTU |
|
|
IB_QP_DEST_QPN |
|
|
IB_QP_RQ_PSN |
|
|
IB_QP_MAX_DEST_RD_ATOMIC |
|
|
IB_QP_MIN_RNR_TIMER),
|
|
[IB_QPT_XRC_INI] = (IB_QP_AV |
|
|
IB_QP_PATH_MTU |
|
|
IB_QP_DEST_QPN |
|
|
IB_QP_RQ_PSN),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_AV |
|
|
IB_QP_PATH_MTU |
|
|
IB_QP_DEST_QPN |
|
|
IB_QP_RQ_PSN |
|
|
IB_QP_MAX_DEST_RD_ATOMIC |
|
|
IB_QP_MIN_RNR_TIMER),
|
|
},
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX),
|
|
[IB_QPT_RC] = (IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX),
|
|
[IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX),
|
|
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
},
|
|
},
|
|
},
|
|
[IB_QPS_RTR] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 },
|
|
[IB_QPS_RTS] = {
|
|
.valid = 1,
|
|
.req_param = {
|
|
[IB_QPT_UD] = IB_QP_SQ_PSN,
|
|
[IB_QPT_UC] = IB_QP_SQ_PSN,
|
|
[IB_QPT_RC] = (IB_QP_TIMEOUT |
|
|
IB_QP_RETRY_CNT |
|
|
IB_QP_RNR_RETRY |
|
|
IB_QP_SQ_PSN |
|
|
IB_QP_MAX_QP_RD_ATOMIC),
|
|
[IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
|
|
IB_QP_RETRY_CNT |
|
|
IB_QP_RNR_RETRY |
|
|
IB_QP_SQ_PSN |
|
|
IB_QP_MAX_QP_RD_ATOMIC),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
|
|
IB_QP_SQ_PSN),
|
|
[IB_QPT_SMI] = IB_QP_SQ_PSN,
|
|
[IB_QPT_GSI] = IB_QP_SQ_PSN,
|
|
},
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_RC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
|
|
}
|
|
}
|
|
},
|
|
[IB_QPS_RTS] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 },
|
|
[IB_QPS_RTS] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_RC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_PATH_MIG_STATE |
|
|
IB_QP_MIN_RNR_TIMER),
|
|
[IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_PATH_MIG_STATE |
|
|
IB_QP_MIN_RNR_TIMER),
|
|
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
|
|
}
|
|
},
|
|
[IB_QPS_SQD] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
|
|
[IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
|
|
[IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
|
|
[IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
|
|
[IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
|
|
[IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
|
|
[IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
|
|
}
|
|
},
|
|
},
|
|
[IB_QPS_SQD] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 },
|
|
[IB_QPS_RTS] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_RC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
}
|
|
},
|
|
[IB_QPS_SQD] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_AV |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_RC] = (IB_QP_PORT |
|
|
IB_QP_AV |
|
|
IB_QP_TIMEOUT |
|
|
IB_QP_RETRY_CNT |
|
|
IB_QP_RNR_RETRY |
|
|
IB_QP_MAX_QP_RD_ATOMIC |
|
|
IB_QP_MAX_DEST_RD_ATOMIC |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_INI] = (IB_QP_PORT |
|
|
IB_QP_AV |
|
|
IB_QP_TIMEOUT |
|
|
IB_QP_RETRY_CNT |
|
|
IB_QP_RNR_RETRY |
|
|
IB_QP_MAX_QP_RD_ATOMIC |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_XRC_TGT] = (IB_QP_PORT |
|
|
IB_QP_AV |
|
|
IB_QP_TIMEOUT |
|
|
IB_QP_MAX_DEST_RD_ATOMIC |
|
|
IB_QP_ALT_PATH |
|
|
IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX |
|
|
IB_QP_MIN_RNR_TIMER |
|
|
IB_QP_PATH_MIG_STATE),
|
|
[IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
|
|
IB_QP_QKEY),
|
|
}
|
|
}
|
|
},
|
|
[IB_QPS_SQE] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 },
|
|
[IB_QPS_RTS] = {
|
|
.valid = 1,
|
|
.opt_param = {
|
|
[IB_QPT_UD] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_UC] = (IB_QP_CUR_STATE |
|
|
IB_QP_ACCESS_FLAGS),
|
|
[IB_QPT_SMI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
[IB_QPT_GSI] = (IB_QP_CUR_STATE |
|
|
IB_QP_QKEY),
|
|
}
|
|
}
|
|
},
|
|
[IB_QPS_ERR] = {
|
|
[IB_QPS_RESET] = { .valid = 1 },
|
|
[IB_QPS_ERR] = { .valid = 1 }
|
|
}
|
|
};
|
|
|
|
bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
|
|
enum ib_qp_type type, enum ib_qp_attr_mask mask)
|
|
{
|
|
enum ib_qp_attr_mask req_param, opt_param;
|
|
|
|
if (mask & IB_QP_CUR_STATE &&
|
|
cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
|
|
cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
|
|
return false;
|
|
|
|
if (!qp_state_table[cur_state][next_state].valid)
|
|
return false;
|
|
|
|
req_param = qp_state_table[cur_state][next_state].req_param[type];
|
|
opt_param = qp_state_table[cur_state][next_state].opt_param[type];
|
|
|
|
if ((mask & req_param) != req_param)
|
|
return false;
|
|
|
|
if (mask & ~(req_param | opt_param | IB_QP_STATE))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_qp_is_ok);
|
|
|
|
/**
|
|
* ib_resolve_eth_dmac - Resolve destination mac address
|
|
* @device: Device to consider
|
|
* @ah_attr: address handle attribute which describes the
|
|
* source and destination parameters
|
|
* ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It
|
|
* returns 0 on success or appropriate error code. It initializes the
|
|
* necessary ah_attr fields when call is successful.
|
|
*/
|
|
static int ib_resolve_eth_dmac(struct ib_device *device,
|
|
struct rdma_ah_attr *ah_attr)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
|
|
if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
|
|
__be32 addr = 0;
|
|
|
|
memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
|
|
ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
|
|
} else {
|
|
ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
|
|
(char *)ah_attr->roce.dmac);
|
|
}
|
|
} else {
|
|
ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static bool is_qp_type_connected(const struct ib_qp *qp)
|
|
{
|
|
return (qp->qp_type == IB_QPT_UC ||
|
|
qp->qp_type == IB_QPT_RC ||
|
|
qp->qp_type == IB_QPT_XRC_INI ||
|
|
qp->qp_type == IB_QPT_XRC_TGT);
|
|
}
|
|
|
|
/**
|
|
* IB core internal function to perform QP attributes modification.
|
|
*/
|
|
static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
|
|
int attr_mask, struct ib_udata *udata)
|
|
{
|
|
u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
|
|
const struct ib_gid_attr *old_sgid_attr_av;
|
|
const struct ib_gid_attr *old_sgid_attr_alt_av;
|
|
int ret;
|
|
|
|
if (attr_mask & IB_QP_AV) {
|
|
ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
|
|
&old_sgid_attr_av);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
if (attr_mask & IB_QP_ALT_PATH) {
|
|
/*
|
|
* FIXME: This does not track the migration state, so if the
|
|
* user loads a new alternate path after the HW has migrated
|
|
* from primary->alternate we will keep the wrong
|
|
* references. This is OK for IB because the reference
|
|
* counting does not serve any functional purpose.
|
|
*/
|
|
ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
|
|
&old_sgid_attr_alt_av);
|
|
if (ret)
|
|
goto out_av;
|
|
|
|
/*
|
|
* Today the core code can only handle alternate paths and APM
|
|
* for IB. Ban them in roce mode.
|
|
*/
|
|
if (!(rdma_protocol_ib(qp->device,
|
|
attr->alt_ah_attr.port_num) &&
|
|
rdma_protocol_ib(qp->device, port))) {
|
|
ret = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the user provided the qp_attr then we have to resolve it. Kernel
|
|
* users have to provide already resolved rdma_ah_attr's
|
|
*/
|
|
if (udata && (attr_mask & IB_QP_AV) &&
|
|
attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
|
|
is_qp_type_connected(qp)) {
|
|
ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
if (rdma_ib_or_roce(qp->device, port)) {
|
|
if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
|
|
dev_warn(&qp->device->dev,
|
|
"%s rq_psn overflow, masking to 24 bits\n",
|
|
__func__);
|
|
attr->rq_psn &= 0xffffff;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
|
|
dev_warn(&qp->device->dev,
|
|
" %s sq_psn overflow, masking to 24 bits\n",
|
|
__func__);
|
|
attr->sq_psn &= 0xffffff;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Bind this qp to a counter automatically based on the rdma counter
|
|
* rules. This only set in RST2INIT with port specified
|
|
*/
|
|
if (!qp->counter && (attr_mask & IB_QP_PORT) &&
|
|
((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT))
|
|
rdma_counter_bind_qp_auto(qp, attr->port_num);
|
|
|
|
ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (attr_mask & IB_QP_PORT)
|
|
qp->port = attr->port_num;
|
|
if (attr_mask & IB_QP_AV)
|
|
qp->av_sgid_attr =
|
|
rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);
|
|
if (attr_mask & IB_QP_ALT_PATH)
|
|
qp->alt_path_sgid_attr = rdma_update_sgid_attr(
|
|
&attr->alt_ah_attr, qp->alt_path_sgid_attr);
|
|
|
|
out:
|
|
if (attr_mask & IB_QP_ALT_PATH)
|
|
rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);
|
|
out_av:
|
|
if (attr_mask & IB_QP_AV)
|
|
rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
|
|
* @ib_qp: The QP to modify.
|
|
* @attr: On input, specifies the QP attributes to modify. On output,
|
|
* the current values of selected QP attributes are returned.
|
|
* @attr_mask: A bit-mask used to specify which attributes of the QP
|
|
* are being modified.
|
|
* @udata: pointer to user's input output buffer information
|
|
* are being modified.
|
|
* It returns 0 on success and returns appropriate error code on error.
|
|
*/
|
|
int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
|
|
int attr_mask, struct ib_udata *udata)
|
|
{
|
|
return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_qp_with_udata);
|
|
|
|
int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width)
|
|
{
|
|
int rc;
|
|
u32 netdev_speed;
|
|
struct net_device *netdev;
|
|
struct ethtool_link_ksettings lksettings;
|
|
|
|
if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
|
|
return -EINVAL;
|
|
|
|
netdev = ib_device_get_netdev(dev, port_num);
|
|
if (!netdev)
|
|
return -ENODEV;
|
|
|
|
rtnl_lock();
|
|
rc = __ethtool_get_link_ksettings(netdev, &lksettings);
|
|
rtnl_unlock();
|
|
|
|
dev_put(netdev);
|
|
|
|
if (!rc) {
|
|
netdev_speed = lksettings.base.speed;
|
|
} else {
|
|
netdev_speed = SPEED_1000;
|
|
pr_warn("%s speed is unknown, defaulting to %d\n", netdev->name,
|
|
netdev_speed);
|
|
}
|
|
|
|
if (netdev_speed <= SPEED_1000) {
|
|
*width = IB_WIDTH_1X;
|
|
*speed = IB_SPEED_SDR;
|
|
} else if (netdev_speed <= SPEED_10000) {
|
|
*width = IB_WIDTH_1X;
|
|
*speed = IB_SPEED_FDR10;
|
|
} else if (netdev_speed <= SPEED_20000) {
|
|
*width = IB_WIDTH_4X;
|
|
*speed = IB_SPEED_DDR;
|
|
} else if (netdev_speed <= SPEED_25000) {
|
|
*width = IB_WIDTH_1X;
|
|
*speed = IB_SPEED_EDR;
|
|
} else if (netdev_speed <= SPEED_40000) {
|
|
*width = IB_WIDTH_4X;
|
|
*speed = IB_SPEED_FDR10;
|
|
} else {
|
|
*width = IB_WIDTH_4X;
|
|
*speed = IB_SPEED_EDR;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_eth_speed);
|
|
|
|
int ib_modify_qp(struct ib_qp *qp,
|
|
struct ib_qp_attr *qp_attr,
|
|
int qp_attr_mask)
|
|
{
|
|
return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_qp);
|
|
|
|
int ib_query_qp(struct ib_qp *qp,
|
|
struct ib_qp_attr *qp_attr,
|
|
int qp_attr_mask,
|
|
struct ib_qp_init_attr *qp_init_attr)
|
|
{
|
|
qp_attr->ah_attr.grh.sgid_attr = NULL;
|
|
qp_attr->alt_ah_attr.grh.sgid_attr = NULL;
|
|
|
|
return qp->device->ops.query_qp ?
|
|
qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask,
|
|
qp_init_attr) : -EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(ib_query_qp);
|
|
|
|
int ib_close_qp(struct ib_qp *qp)
|
|
{
|
|
struct ib_qp *real_qp;
|
|
unsigned long flags;
|
|
|
|
real_qp = qp->real_qp;
|
|
if (real_qp == qp)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
|
|
list_del(&qp->open_list);
|
|
spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
|
|
|
|
atomic_dec(&real_qp->usecnt);
|
|
if (qp->qp_sec)
|
|
ib_close_shared_qp_security(qp->qp_sec);
|
|
kfree(qp);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_close_qp);
|
|
|
|
static int __ib_destroy_shared_qp(struct ib_qp *qp)
|
|
{
|
|
struct ib_xrcd *xrcd;
|
|
struct ib_qp *real_qp;
|
|
int ret;
|
|
|
|
real_qp = qp->real_qp;
|
|
xrcd = real_qp->xrcd;
|
|
|
|
mutex_lock(&xrcd->tgt_qp_mutex);
|
|
ib_close_qp(qp);
|
|
if (atomic_read(&real_qp->usecnt) == 0)
|
|
list_del(&real_qp->xrcd_list);
|
|
else
|
|
real_qp = NULL;
|
|
mutex_unlock(&xrcd->tgt_qp_mutex);
|
|
|
|
if (real_qp) {
|
|
ret = ib_destroy_qp(real_qp);
|
|
if (!ret)
|
|
atomic_dec(&xrcd->usecnt);
|
|
else
|
|
__ib_insert_xrcd_qp(xrcd, real_qp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)
|
|
{
|
|
const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;
|
|
const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;
|
|
struct ib_pd *pd;
|
|
struct ib_cq *scq, *rcq;
|
|
struct ib_srq *srq;
|
|
struct ib_rwq_ind_table *ind_tbl;
|
|
struct ib_qp_security *sec;
|
|
int ret;
|
|
|
|
WARN_ON_ONCE(qp->mrs_used > 0);
|
|
|
|
if (atomic_read(&qp->usecnt))
|
|
return -EBUSY;
|
|
|
|
if (qp->real_qp != qp)
|
|
return __ib_destroy_shared_qp(qp);
|
|
|
|
pd = qp->pd;
|
|
scq = qp->send_cq;
|
|
rcq = qp->recv_cq;
|
|
srq = qp->srq;
|
|
ind_tbl = qp->rwq_ind_tbl;
|
|
sec = qp->qp_sec;
|
|
if (sec)
|
|
ib_destroy_qp_security_begin(sec);
|
|
|
|
if (!qp->uobject)
|
|
rdma_rw_cleanup_mrs(qp);
|
|
|
|
rdma_counter_unbind_qp(qp, true);
|
|
rdma_restrack_del(&qp->res);
|
|
ret = qp->device->ops.destroy_qp(qp, udata);
|
|
if (!ret) {
|
|
if (alt_path_sgid_attr)
|
|
rdma_put_gid_attr(alt_path_sgid_attr);
|
|
if (av_sgid_attr)
|
|
rdma_put_gid_attr(av_sgid_attr);
|
|
if (pd)
|
|
atomic_dec(&pd->usecnt);
|
|
if (scq)
|
|
atomic_dec(&scq->usecnt);
|
|
if (rcq)
|
|
atomic_dec(&rcq->usecnt);
|
|
if (srq)
|
|
atomic_dec(&srq->usecnt);
|
|
if (ind_tbl)
|
|
atomic_dec(&ind_tbl->usecnt);
|
|
if (sec)
|
|
ib_destroy_qp_security_end(sec);
|
|
} else {
|
|
if (sec)
|
|
ib_destroy_qp_security_abort(sec);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_qp_user);
|
|
|
|
/* Completion queues */
|
|
|
|
struct ib_cq *__ib_create_cq(struct ib_device *device,
|
|
ib_comp_handler comp_handler,
|
|
void (*event_handler)(struct ib_event *, void *),
|
|
void *cq_context,
|
|
const struct ib_cq_init_attr *cq_attr,
|
|
const char *caller)
|
|
{
|
|
struct ib_cq *cq;
|
|
int ret;
|
|
|
|
cq = rdma_zalloc_drv_obj(device, ib_cq);
|
|
if (!cq)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
cq->device = device;
|
|
cq->uobject = NULL;
|
|
cq->comp_handler = comp_handler;
|
|
cq->event_handler = event_handler;
|
|
cq->cq_context = cq_context;
|
|
atomic_set(&cq->usecnt, 0);
|
|
cq->res.type = RDMA_RESTRACK_CQ;
|
|
rdma_restrack_set_task(&cq->res, caller);
|
|
|
|
ret = device->ops.create_cq(cq, cq_attr, NULL);
|
|
if (ret) {
|
|
kfree(cq);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
rdma_restrack_kadd(&cq->res);
|
|
return cq;
|
|
}
|
|
EXPORT_SYMBOL(__ib_create_cq);
|
|
|
|
int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
|
|
{
|
|
return cq->device->ops.modify_cq ?
|
|
cq->device->ops.modify_cq(cq, cq_count,
|
|
cq_period) : -EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_cq_moderation);
|
|
|
|
int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
|
|
{
|
|
if (atomic_read(&cq->usecnt))
|
|
return -EBUSY;
|
|
|
|
rdma_restrack_del(&cq->res);
|
|
cq->device->ops.destroy_cq(cq, udata);
|
|
kfree(cq);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_cq_user);
|
|
|
|
int ib_resize_cq(struct ib_cq *cq, int cqe)
|
|
{
|
|
return cq->device->ops.resize_cq ?
|
|
cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
|
|
}
|
|
EXPORT_SYMBOL(ib_resize_cq);
|
|
|
|
/* Memory regions */
|
|
|
|
int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
|
|
{
|
|
struct ib_pd *pd = mr->pd;
|
|
struct ib_dm *dm = mr->dm;
|
|
struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
|
|
int ret;
|
|
|
|
rdma_restrack_del(&mr->res);
|
|
ret = mr->device->ops.dereg_mr(mr, udata);
|
|
if (!ret) {
|
|
atomic_dec(&pd->usecnt);
|
|
if (dm)
|
|
atomic_dec(&dm->usecnt);
|
|
kfree(sig_attrs);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_dereg_mr_user);
|
|
|
|
/**
|
|
* ib_alloc_mr_user() - Allocates a memory region
|
|
* @pd: protection domain associated with the region
|
|
* @mr_type: memory region type
|
|
* @max_num_sg: maximum sg entries available for registration.
|
|
* @udata: user data or null for kernel objects
|
|
*
|
|
* Notes:
|
|
* Memory registeration page/sg lists must not exceed max_num_sg.
|
|
* For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
|
|
* max_num_sg * used_page_size.
|
|
*
|
|
*/
|
|
struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
|
|
u32 max_num_sg, struct ib_udata *udata)
|
|
{
|
|
struct ib_mr *mr;
|
|
|
|
if (!pd->device->ops.alloc_mr)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
if (WARN_ON_ONCE(mr_type == IB_MR_TYPE_INTEGRITY))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
|
|
if (!IS_ERR(mr)) {
|
|
mr->device = pd->device;
|
|
mr->pd = pd;
|
|
mr->dm = NULL;
|
|
mr->uobject = NULL;
|
|
atomic_inc(&pd->usecnt);
|
|
mr->need_inval = false;
|
|
mr->res.type = RDMA_RESTRACK_MR;
|
|
rdma_restrack_kadd(&mr->res);
|
|
mr->type = mr_type;
|
|
mr->sig_attrs = NULL;
|
|
}
|
|
|
|
return mr;
|
|
}
|
|
EXPORT_SYMBOL(ib_alloc_mr_user);
|
|
|
|
/**
|
|
* ib_alloc_mr_integrity() - Allocates an integrity memory region
|
|
* @pd: protection domain associated with the region
|
|
* @max_num_data_sg: maximum data sg entries available for registration
|
|
* @max_num_meta_sg: maximum metadata sg entries available for
|
|
* registration
|
|
*
|
|
* Notes:
|
|
* Memory registration page/sg lists must not exceed max_num_sg,
|
|
* also the integrity page/sg lists must not exceed max_num_meta_sg.
|
|
*
|
|
*/
|
|
struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
|
|
u32 max_num_data_sg,
|
|
u32 max_num_meta_sg)
|
|
{
|
|
struct ib_mr *mr;
|
|
struct ib_sig_attrs *sig_attrs;
|
|
|
|
if (!pd->device->ops.alloc_mr_integrity ||
|
|
!pd->device->ops.map_mr_sg_pi)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
if (!max_num_meta_sg)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);
|
|
if (!sig_attrs)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
|
|
max_num_meta_sg);
|
|
if (IS_ERR(mr)) {
|
|
kfree(sig_attrs);
|
|
return mr;
|
|
}
|
|
|
|
mr->device = pd->device;
|
|
mr->pd = pd;
|
|
mr->dm = NULL;
|
|
mr->uobject = NULL;
|
|
atomic_inc(&pd->usecnt);
|
|
mr->need_inval = false;
|
|
mr->res.type = RDMA_RESTRACK_MR;
|
|
rdma_restrack_kadd(&mr->res);
|
|
mr->type = IB_MR_TYPE_INTEGRITY;
|
|
mr->sig_attrs = sig_attrs;
|
|
|
|
return mr;
|
|
}
|
|
EXPORT_SYMBOL(ib_alloc_mr_integrity);
|
|
|
|
/* "Fast" memory regions */
|
|
|
|
struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
|
|
int mr_access_flags,
|
|
struct ib_fmr_attr *fmr_attr)
|
|
{
|
|
struct ib_fmr *fmr;
|
|
|
|
if (!pd->device->ops.alloc_fmr)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
fmr = pd->device->ops.alloc_fmr(pd, mr_access_flags, fmr_attr);
|
|
if (!IS_ERR(fmr)) {
|
|
fmr->device = pd->device;
|
|
fmr->pd = pd;
|
|
atomic_inc(&pd->usecnt);
|
|
}
|
|
|
|
return fmr;
|
|
}
|
|
EXPORT_SYMBOL(ib_alloc_fmr);
|
|
|
|
int ib_unmap_fmr(struct list_head *fmr_list)
|
|
{
|
|
struct ib_fmr *fmr;
|
|
|
|
if (list_empty(fmr_list))
|
|
return 0;
|
|
|
|
fmr = list_entry(fmr_list->next, struct ib_fmr, list);
|
|
return fmr->device->ops.unmap_fmr(fmr_list);
|
|
}
|
|
EXPORT_SYMBOL(ib_unmap_fmr);
|
|
|
|
int ib_dealloc_fmr(struct ib_fmr *fmr)
|
|
{
|
|
struct ib_pd *pd;
|
|
int ret;
|
|
|
|
pd = fmr->pd;
|
|
ret = fmr->device->ops.dealloc_fmr(fmr);
|
|
if (!ret)
|
|
atomic_dec(&pd->usecnt);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_dealloc_fmr);
|
|
|
|
/* Multicast groups */
|
|
|
|
static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
|
|
{
|
|
struct ib_qp_init_attr init_attr = {};
|
|
struct ib_qp_attr attr = {};
|
|
int num_eth_ports = 0;
|
|
int port;
|
|
|
|
/* If QP state >= init, it is assigned to a port and we can check this
|
|
* port only.
|
|
*/
|
|
if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
|
|
if (attr.qp_state >= IB_QPS_INIT) {
|
|
if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
|
|
IB_LINK_LAYER_INFINIBAND)
|
|
return true;
|
|
goto lid_check;
|
|
}
|
|
}
|
|
|
|
/* Can't get a quick answer, iterate over all ports */
|
|
for (port = 0; port < qp->device->phys_port_cnt; port++)
|
|
if (rdma_port_get_link_layer(qp->device, port) !=
|
|
IB_LINK_LAYER_INFINIBAND)
|
|
num_eth_ports++;
|
|
|
|
/* If we have at lease one Ethernet port, RoCE annex declares that
|
|
* multicast LID should be ignored. We can't tell at this step if the
|
|
* QP belongs to an IB or Ethernet port.
|
|
*/
|
|
if (num_eth_ports)
|
|
return true;
|
|
|
|
/* If all the ports are IB, we can check according to IB spec. */
|
|
lid_check:
|
|
return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
|
|
lid == be16_to_cpu(IB_LID_PERMISSIVE));
|
|
}
|
|
|
|
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
|
|
{
|
|
int ret;
|
|
|
|
if (!qp->device->ops.attach_mcast)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
|
|
qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
|
|
return -EINVAL;
|
|
|
|
ret = qp->device->ops.attach_mcast(qp, gid, lid);
|
|
if (!ret)
|
|
atomic_inc(&qp->usecnt);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_attach_mcast);
|
|
|
|
int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
|
|
{
|
|
int ret;
|
|
|
|
if (!qp->device->ops.detach_mcast)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
|
|
qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
|
|
return -EINVAL;
|
|
|
|
ret = qp->device->ops.detach_mcast(qp, gid, lid);
|
|
if (!ret)
|
|
atomic_dec(&qp->usecnt);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_detach_mcast);
|
|
|
|
struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
|
|
{
|
|
struct ib_xrcd *xrcd;
|
|
|
|
if (!device->ops.alloc_xrcd)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
xrcd = device->ops.alloc_xrcd(device, NULL);
|
|
if (!IS_ERR(xrcd)) {
|
|
xrcd->device = device;
|
|
xrcd->inode = NULL;
|
|
atomic_set(&xrcd->usecnt, 0);
|
|
mutex_init(&xrcd->tgt_qp_mutex);
|
|
INIT_LIST_HEAD(&xrcd->tgt_qp_list);
|
|
}
|
|
|
|
return xrcd;
|
|
}
|
|
EXPORT_SYMBOL(__ib_alloc_xrcd);
|
|
|
|
int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
|
|
{
|
|
struct ib_qp *qp;
|
|
int ret;
|
|
|
|
if (atomic_read(&xrcd->usecnt))
|
|
return -EBUSY;
|
|
|
|
while (!list_empty(&xrcd->tgt_qp_list)) {
|
|
qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
|
|
ret = ib_destroy_qp(qp);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return xrcd->device->ops.dealloc_xrcd(xrcd, udata);
|
|
}
|
|
EXPORT_SYMBOL(ib_dealloc_xrcd);
|
|
|
|
/**
|
|
* ib_create_wq - Creates a WQ associated with the specified protection
|
|
* domain.
|
|
* @pd: The protection domain associated with the WQ.
|
|
* @wq_attr: A list of initial attributes required to create the
|
|
* WQ. If WQ creation succeeds, then the attributes are updated to
|
|
* the actual capabilities of the created WQ.
|
|
*
|
|
* wq_attr->max_wr and wq_attr->max_sge determine
|
|
* the requested size of the WQ, and set to the actual values allocated
|
|
* on return.
|
|
* If ib_create_wq() succeeds, then max_wr and max_sge will always be
|
|
* at least as large as the requested values.
|
|
*/
|
|
struct ib_wq *ib_create_wq(struct ib_pd *pd,
|
|
struct ib_wq_init_attr *wq_attr)
|
|
{
|
|
struct ib_wq *wq;
|
|
|
|
if (!pd->device->ops.create_wq)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
wq = pd->device->ops.create_wq(pd, wq_attr, NULL);
|
|
if (!IS_ERR(wq)) {
|
|
wq->event_handler = wq_attr->event_handler;
|
|
wq->wq_context = wq_attr->wq_context;
|
|
wq->wq_type = wq_attr->wq_type;
|
|
wq->cq = wq_attr->cq;
|
|
wq->device = pd->device;
|
|
wq->pd = pd;
|
|
wq->uobject = NULL;
|
|
atomic_inc(&pd->usecnt);
|
|
atomic_inc(&wq_attr->cq->usecnt);
|
|
atomic_set(&wq->usecnt, 0);
|
|
}
|
|
return wq;
|
|
}
|
|
EXPORT_SYMBOL(ib_create_wq);
|
|
|
|
/**
|
|
* ib_destroy_wq - Destroys the specified user WQ.
|
|
* @wq: The WQ to destroy.
|
|
* @udata: Valid user data
|
|
*/
|
|
int ib_destroy_wq(struct ib_wq *wq, struct ib_udata *udata)
|
|
{
|
|
struct ib_cq *cq = wq->cq;
|
|
struct ib_pd *pd = wq->pd;
|
|
|
|
if (atomic_read(&wq->usecnt))
|
|
return -EBUSY;
|
|
|
|
wq->device->ops.destroy_wq(wq, udata);
|
|
atomic_dec(&pd->usecnt);
|
|
atomic_dec(&cq->usecnt);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_wq);
|
|
|
|
/**
|
|
* ib_modify_wq - Modifies the specified WQ.
|
|
* @wq: The WQ to modify.
|
|
* @wq_attr: On input, specifies the WQ attributes to modify.
|
|
* @wq_attr_mask: A bit-mask used to specify which attributes of the WQ
|
|
* are being modified.
|
|
* On output, the current values of selected WQ attributes are returned.
|
|
*/
|
|
int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
|
|
u32 wq_attr_mask)
|
|
{
|
|
int err;
|
|
|
|
if (!wq->device->ops.modify_wq)
|
|
return -EOPNOTSUPP;
|
|
|
|
err = wq->device->ops.modify_wq(wq, wq_attr, wq_attr_mask, NULL);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ib_modify_wq);
|
|
|
|
/*
|
|
* ib_create_rwq_ind_table - Creates a RQ Indirection Table.
|
|
* @device: The device on which to create the rwq indirection table.
|
|
* @ib_rwq_ind_table_init_attr: A list of initial attributes required to
|
|
* create the Indirection Table.
|
|
*
|
|
* Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less
|
|
* than the created ib_rwq_ind_table object and the caller is responsible
|
|
* for its memory allocation/free.
|
|
*/
|
|
struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
|
|
struct ib_rwq_ind_table_init_attr *init_attr)
|
|
{
|
|
struct ib_rwq_ind_table *rwq_ind_table;
|
|
int i;
|
|
u32 table_size;
|
|
|
|
if (!device->ops.create_rwq_ind_table)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
table_size = (1 << init_attr->log_ind_tbl_size);
|
|
rwq_ind_table = device->ops.create_rwq_ind_table(device,
|
|
init_attr, NULL);
|
|
if (IS_ERR(rwq_ind_table))
|
|
return rwq_ind_table;
|
|
|
|
rwq_ind_table->ind_tbl = init_attr->ind_tbl;
|
|
rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size;
|
|
rwq_ind_table->device = device;
|
|
rwq_ind_table->uobject = NULL;
|
|
atomic_set(&rwq_ind_table->usecnt, 0);
|
|
|
|
for (i = 0; i < table_size; i++)
|
|
atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt);
|
|
|
|
return rwq_ind_table;
|
|
}
|
|
EXPORT_SYMBOL(ib_create_rwq_ind_table);
|
|
|
|
/*
|
|
* ib_destroy_rwq_ind_table - Destroys the specified Indirection Table.
|
|
* @wq_ind_table: The Indirection Table to destroy.
|
|
*/
|
|
int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table)
|
|
{
|
|
int err, i;
|
|
u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size);
|
|
struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl;
|
|
|
|
if (atomic_read(&rwq_ind_table->usecnt))
|
|
return -EBUSY;
|
|
|
|
err = rwq_ind_table->device->ops.destroy_rwq_ind_table(rwq_ind_table);
|
|
if (!err) {
|
|
for (i = 0; i < table_size; i++)
|
|
atomic_dec(&ind_tbl[i]->usecnt);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_rwq_ind_table);
|
|
|
|
int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
|
|
struct ib_mr_status *mr_status)
|
|
{
|
|
if (!mr->device->ops.check_mr_status)
|
|
return -EOPNOTSUPP;
|
|
|
|
return mr->device->ops.check_mr_status(mr, check_mask, mr_status);
|
|
}
|
|
EXPORT_SYMBOL(ib_check_mr_status);
|
|
|
|
int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
|
|
int state)
|
|
{
|
|
if (!device->ops.set_vf_link_state)
|
|
return -EOPNOTSUPP;
|
|
|
|
return device->ops.set_vf_link_state(device, vf, port, state);
|
|
}
|
|
EXPORT_SYMBOL(ib_set_vf_link_state);
|
|
|
|
int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
|
|
struct ifla_vf_info *info)
|
|
{
|
|
if (!device->ops.get_vf_config)
|
|
return -EOPNOTSUPP;
|
|
|
|
return device->ops.get_vf_config(device, vf, port, info);
|
|
}
|
|
EXPORT_SYMBOL(ib_get_vf_config);
|
|
|
|
int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
|
|
struct ifla_vf_stats *stats)
|
|
{
|
|
if (!device->ops.get_vf_stats)
|
|
return -EOPNOTSUPP;
|
|
|
|
return device->ops.get_vf_stats(device, vf, port, stats);
|
|
}
|
|
EXPORT_SYMBOL(ib_get_vf_stats);
|
|
|
|
int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
|
|
int type)
|
|
{
|
|
if (!device->ops.set_vf_guid)
|
|
return -EOPNOTSUPP;
|
|
|
|
return device->ops.set_vf_guid(device, vf, port, guid, type);
|
|
}
|
|
EXPORT_SYMBOL(ib_set_vf_guid);
|
|
|
|
/**
|
|
* ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection
|
|
* information) and set an appropriate memory region for registration.
|
|
* @mr: memory region
|
|
* @data_sg: dma mapped scatterlist for data
|
|
* @data_sg_nents: number of entries in data_sg
|
|
* @data_sg_offset: offset in bytes into data_sg
|
|
* @meta_sg: dma mapped scatterlist for metadata
|
|
* @meta_sg_nents: number of entries in meta_sg
|
|
* @meta_sg_offset: offset in bytes into meta_sg
|
|
* @page_size: page vector desired page size
|
|
*
|
|
* Constraints:
|
|
* - The MR must be allocated with type IB_MR_TYPE_INTEGRITY.
|
|
*
|
|
* Return: 0 on success.
|
|
*
|
|
* After this completes successfully, the memory region
|
|
* is ready for registration.
|
|
*/
|
|
int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,
|
|
int data_sg_nents, unsigned int *data_sg_offset,
|
|
struct scatterlist *meta_sg, int meta_sg_nents,
|
|
unsigned int *meta_sg_offset, unsigned int page_size)
|
|
{
|
|
if (unlikely(!mr->device->ops.map_mr_sg_pi ||
|
|
WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY)))
|
|
return -EOPNOTSUPP;
|
|
|
|
mr->page_size = page_size;
|
|
|
|
return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents,
|
|
data_sg_offset, meta_sg,
|
|
meta_sg_nents, meta_sg_offset);
|
|
}
|
|
EXPORT_SYMBOL(ib_map_mr_sg_pi);
|
|
|
|
/**
|
|
* ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
|
|
* and set it the memory region.
|
|
* @mr: memory region
|
|
* @sg: dma mapped scatterlist
|
|
* @sg_nents: number of entries in sg
|
|
* @sg_offset: offset in bytes into sg
|
|
* @page_size: page vector desired page size
|
|
*
|
|
* Constraints:
|
|
* - The first sg element is allowed to have an offset.
|
|
* - Each sg element must either be aligned to page_size or virtually
|
|
* contiguous to the previous element. In case an sg element has a
|
|
* non-contiguous offset, the mapping prefix will not include it.
|
|
* - The last sg element is allowed to have length less than page_size.
|
|
* - If sg_nents total byte length exceeds the mr max_num_sge * page_size
|
|
* then only max_num_sg entries will be mapped.
|
|
* - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
|
|
* constraints holds and the page_size argument is ignored.
|
|
*
|
|
* Returns the number of sg elements that were mapped to the memory region.
|
|
*
|
|
* After this completes successfully, the memory region
|
|
* is ready for registration.
|
|
*/
|
|
int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
|
|
unsigned int *sg_offset, unsigned int page_size)
|
|
{
|
|
if (unlikely(!mr->device->ops.map_mr_sg))
|
|
return -EOPNOTSUPP;
|
|
|
|
mr->page_size = page_size;
|
|
|
|
return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset);
|
|
}
|
|
EXPORT_SYMBOL(ib_map_mr_sg);
|
|
|
|
/**
|
|
* ib_sg_to_pages() - Convert the largest prefix of a sg list
|
|
* to a page vector
|
|
* @mr: memory region
|
|
* @sgl: dma mapped scatterlist
|
|
* @sg_nents: number of entries in sg
|
|
* @sg_offset_p: IN: start offset in bytes into sg
|
|
* OUT: offset in bytes for element n of the sg of the first
|
|
* byte that has not been processed where n is the return
|
|
* value of this function.
|
|
* @set_page: driver page assignment function pointer
|
|
*
|
|
* Core service helper for drivers to convert the largest
|
|
* prefix of given sg list to a page vector. The sg list
|
|
* prefix converted is the prefix that meet the requirements
|
|
* of ib_map_mr_sg.
|
|
*
|
|
* Returns the number of sg elements that were assigned to
|
|
* a page vector.
|
|
*/
|
|
int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
|
|
unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
|
|
{
|
|
struct scatterlist *sg;
|
|
u64 last_end_dma_addr = 0;
|
|
unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
|
|
unsigned int last_page_off = 0;
|
|
u64 page_mask = ~((u64)mr->page_size - 1);
|
|
int i, ret;
|
|
|
|
if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
|
|
return -EINVAL;
|
|
|
|
mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
|
|
mr->length = 0;
|
|
|
|
for_each_sg(sgl, sg, sg_nents, i) {
|
|
u64 dma_addr = sg_dma_address(sg) + sg_offset;
|
|
u64 prev_addr = dma_addr;
|
|
unsigned int dma_len = sg_dma_len(sg) - sg_offset;
|
|
u64 end_dma_addr = dma_addr + dma_len;
|
|
u64 page_addr = dma_addr & page_mask;
|
|
|
|
/*
|
|
* For the second and later elements, check whether either the
|
|
* end of element i-1 or the start of element i is not aligned
|
|
* on a page boundary.
|
|
*/
|
|
if (i && (last_page_off != 0 || page_addr != dma_addr)) {
|
|
/* Stop mapping if there is a gap. */
|
|
if (last_end_dma_addr != dma_addr)
|
|
break;
|
|
|
|
/*
|
|
* Coalesce this element with the last. If it is small
|
|
* enough just update mr->length. Otherwise start
|
|
* mapping from the next page.
|
|
*/
|
|
goto next_page;
|
|
}
|
|
|
|
do {
|
|
ret = set_page(mr, page_addr);
|
|
if (unlikely(ret < 0)) {
|
|
sg_offset = prev_addr - sg_dma_address(sg);
|
|
mr->length += prev_addr - dma_addr;
|
|
if (sg_offset_p)
|
|
*sg_offset_p = sg_offset;
|
|
return i || sg_offset ? i : ret;
|
|
}
|
|
prev_addr = page_addr;
|
|
next_page:
|
|
page_addr += mr->page_size;
|
|
} while (page_addr < end_dma_addr);
|
|
|
|
mr->length += dma_len;
|
|
last_end_dma_addr = end_dma_addr;
|
|
last_page_off = end_dma_addr & ~page_mask;
|
|
|
|
sg_offset = 0;
|
|
}
|
|
|
|
if (sg_offset_p)
|
|
*sg_offset_p = 0;
|
|
return i;
|
|
}
|
|
EXPORT_SYMBOL(ib_sg_to_pages);
|
|
|
|
struct ib_drain_cqe {
|
|
struct ib_cqe cqe;
|
|
struct completion done;
|
|
};
|
|
|
|
static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
|
|
cqe);
|
|
|
|
complete(&cqe->done);
|
|
}
|
|
|
|
/*
|
|
* Post a WR and block until its completion is reaped for the SQ.
|
|
*/
|
|
static void __ib_drain_sq(struct ib_qp *qp)
|
|
{
|
|
struct ib_cq *cq = qp->send_cq;
|
|
struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
|
|
struct ib_drain_cqe sdrain;
|
|
struct ib_rdma_wr swr = {
|
|
.wr = {
|
|
.next = NULL,
|
|
{ .wr_cqe = &sdrain.cqe, },
|
|
.opcode = IB_WR_RDMA_WRITE,
|
|
},
|
|
};
|
|
int ret;
|
|
|
|
ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
|
|
if (ret) {
|
|
WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
|
|
return;
|
|
}
|
|
|
|
sdrain.cqe.done = ib_drain_qp_done;
|
|
init_completion(&sdrain.done);
|
|
|
|
ret = ib_post_send(qp, &swr.wr, NULL);
|
|
if (ret) {
|
|
WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
|
|
return;
|
|
}
|
|
|
|
if (cq->poll_ctx == IB_POLL_DIRECT)
|
|
while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
|
|
ib_process_cq_direct(cq, -1);
|
|
else
|
|
wait_for_completion(&sdrain.done);
|
|
}
|
|
|
|
/*
|
|
* Post a WR and block until its completion is reaped for the RQ.
|
|
*/
|
|
static void __ib_drain_rq(struct ib_qp *qp)
|
|
{
|
|
struct ib_cq *cq = qp->recv_cq;
|
|
struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
|
|
struct ib_drain_cqe rdrain;
|
|
struct ib_recv_wr rwr = {};
|
|
int ret;
|
|
|
|
ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
|
|
if (ret) {
|
|
WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
|
|
return;
|
|
}
|
|
|
|
rwr.wr_cqe = &rdrain.cqe;
|
|
rdrain.cqe.done = ib_drain_qp_done;
|
|
init_completion(&rdrain.done);
|
|
|
|
ret = ib_post_recv(qp, &rwr, NULL);
|
|
if (ret) {
|
|
WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
|
|
return;
|
|
}
|
|
|
|
if (cq->poll_ctx == IB_POLL_DIRECT)
|
|
while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
|
|
ib_process_cq_direct(cq, -1);
|
|
else
|
|
wait_for_completion(&rdrain.done);
|
|
}
|
|
|
|
/**
|
|
* ib_drain_sq() - Block until all SQ CQEs have been consumed by the
|
|
* application.
|
|
* @qp: queue pair to drain
|
|
*
|
|
* If the device has a provider-specific drain function, then
|
|
* call that. Otherwise call the generic drain function
|
|
* __ib_drain_sq().
|
|
*
|
|
* The caller must:
|
|
*
|
|
* ensure there is room in the CQ and SQ for the drain work request and
|
|
* completion.
|
|
*
|
|
* allocate the CQ using ib_alloc_cq().
|
|
*
|
|
* ensure that there are no other contexts that are posting WRs concurrently.
|
|
* Otherwise the drain is not guaranteed.
|
|
*/
|
|
void ib_drain_sq(struct ib_qp *qp)
|
|
{
|
|
if (qp->device->ops.drain_sq)
|
|
qp->device->ops.drain_sq(qp);
|
|
else
|
|
__ib_drain_sq(qp);
|
|
}
|
|
EXPORT_SYMBOL(ib_drain_sq);
|
|
|
|
/**
|
|
* ib_drain_rq() - Block until all RQ CQEs have been consumed by the
|
|
* application.
|
|
* @qp: queue pair to drain
|
|
*
|
|
* If the device has a provider-specific drain function, then
|
|
* call that. Otherwise call the generic drain function
|
|
* __ib_drain_rq().
|
|
*
|
|
* The caller must:
|
|
*
|
|
* ensure there is room in the CQ and RQ for the drain work request and
|
|
* completion.
|
|
*
|
|
* allocate the CQ using ib_alloc_cq().
|
|
*
|
|
* ensure that there are no other contexts that are posting WRs concurrently.
|
|
* Otherwise the drain is not guaranteed.
|
|
*/
|
|
void ib_drain_rq(struct ib_qp *qp)
|
|
{
|
|
if (qp->device->ops.drain_rq)
|
|
qp->device->ops.drain_rq(qp);
|
|
else
|
|
__ib_drain_rq(qp);
|
|
}
|
|
EXPORT_SYMBOL(ib_drain_rq);
|
|
|
|
/**
|
|
* ib_drain_qp() - Block until all CQEs have been consumed by the
|
|
* application on both the RQ and SQ.
|
|
* @qp: queue pair to drain
|
|
*
|
|
* The caller must:
|
|
*
|
|
* ensure there is room in the CQ(s), SQ, and RQ for drain work requests
|
|
* and completions.
|
|
*
|
|
* allocate the CQs using ib_alloc_cq().
|
|
*
|
|
* ensure that there are no other contexts that are posting WRs concurrently.
|
|
* Otherwise the drain is not guaranteed.
|
|
*/
|
|
void ib_drain_qp(struct ib_qp *qp)
|
|
{
|
|
ib_drain_sq(qp);
|
|
if (!qp->srq)
|
|
ib_drain_rq(qp);
|
|
}
|
|
EXPORT_SYMBOL(ib_drain_qp);
|
|
|
|
struct net_device *rdma_alloc_netdev(struct ib_device *device, u8 port_num,
|
|
enum rdma_netdev_t type, const char *name,
|
|
unsigned char name_assign_type,
|
|
void (*setup)(struct net_device *))
|
|
{
|
|
struct rdma_netdev_alloc_params params;
|
|
struct net_device *netdev;
|
|
int rc;
|
|
|
|
if (!device->ops.rdma_netdev_get_params)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
rc = device->ops.rdma_netdev_get_params(device, port_num, type,
|
|
¶ms);
|
|
if (rc)
|
|
return ERR_PTR(rc);
|
|
|
|
netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type,
|
|
setup, params.txqs, params.rxqs);
|
|
if (!netdev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return netdev;
|
|
}
|
|
EXPORT_SYMBOL(rdma_alloc_netdev);
|
|
|
|
int rdma_init_netdev(struct ib_device *device, u8 port_num,
|
|
enum rdma_netdev_t type, const char *name,
|
|
unsigned char name_assign_type,
|
|
void (*setup)(struct net_device *),
|
|
struct net_device *netdev)
|
|
{
|
|
struct rdma_netdev_alloc_params params;
|
|
int rc;
|
|
|
|
if (!device->ops.rdma_netdev_get_params)
|
|
return -EOPNOTSUPP;
|
|
|
|
rc = device->ops.rdma_netdev_get_params(device, port_num, type,
|
|
¶ms);
|
|
if (rc)
|
|
return rc;
|
|
|
|
return params.initialize_rdma_netdev(device, port_num,
|
|
netdev, params.param);
|
|
}
|
|
EXPORT_SYMBOL(rdma_init_netdev);
|
|
|
|
void __rdma_block_iter_start(struct ib_block_iter *biter,
|
|
struct scatterlist *sglist, unsigned int nents,
|
|
unsigned long pgsz)
|
|
{
|
|
memset(biter, 0, sizeof(struct ib_block_iter));
|
|
biter->__sg = sglist;
|
|
biter->__sg_nents = nents;
|
|
|
|
/* Driver provides best block size to use */
|
|
biter->__pg_bit = __fls(pgsz);
|
|
}
|
|
EXPORT_SYMBOL(__rdma_block_iter_start);
|
|
|
|
bool __rdma_block_iter_next(struct ib_block_iter *biter)
|
|
{
|
|
unsigned int block_offset;
|
|
|
|
if (!biter->__sg_nents || !biter->__sg)
|
|
return false;
|
|
|
|
biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance;
|
|
block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1);
|
|
biter->__sg_advance += BIT_ULL(biter->__pg_bit) - block_offset;
|
|
|
|
if (biter->__sg_advance >= sg_dma_len(biter->__sg)) {
|
|
biter->__sg_advance = 0;
|
|
biter->__sg = sg_next(biter->__sg);
|
|
biter->__sg_nents--;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
EXPORT_SYMBOL(__rdma_block_iter_next);
|