verbs.c 69.3 KB
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/*
 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
 * Copyright (c) 2004 Intel Corporation.  All rights reserved.
 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
 * 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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 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/errno.h>
#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>
#include <linux/in6.h>
#include <net/addrconf.h>
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#include <linux/security.h>
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#include <rdma/ib_verbs.h>
#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,
			       struct rdma_ah_attr *ah_attr);

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static const char * const ib_events[] = {
	[IB_EVENT_CQ_ERR]		= "CQ error",
	[IB_EVENT_QP_FATAL]		= "QP fatal error",
	[IB_EVENT_QP_REQ_ERR]		= "QP request error",
	[IB_EVENT_QP_ACCESS_ERR]	= "QP access error",
	[IB_EVENT_COMM_EST]		= "communication established",
	[IB_EVENT_SQ_DRAINED]		= "send queue drained",
	[IB_EVENT_PATH_MIG]		= "path migration successful",
	[IB_EVENT_PATH_MIG_ERR]		= "path migration error",
	[IB_EVENT_DEVICE_FATAL]		= "device fatal error",
	[IB_EVENT_PORT_ACTIVE]		= "port active",
	[IB_EVENT_PORT_ERR]		= "port error",
	[IB_EVENT_LID_CHANGE]		= "LID change",
	[IB_EVENT_PKEY_CHANGE]		= "P_key change",
	[IB_EVENT_SM_CHANGE]		= "SM change",
	[IB_EVENT_SRQ_ERR]		= "SRQ error",
	[IB_EVENT_SRQ_LIMIT_REACHED]	= "SRQ limit reached",
	[IB_EVENT_QP_LAST_WQE_REACHED]	= "last WQE reached",
	[IB_EVENT_CLIENT_REREGISTER]	= "client reregister",
	[IB_EVENT_GID_CHANGE]		= "GID changed",
};

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const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
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{
	size_t index = event;

	return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
			ib_events[index] : "unrecognized event";
}
EXPORT_SYMBOL(ib_event_msg);

static const char * const wc_statuses[] = {
	[IB_WC_SUCCESS]			= "success",
	[IB_WC_LOC_LEN_ERR]		= "local length error",
	[IB_WC_LOC_QP_OP_ERR]		= "local QP operation error",
	[IB_WC_LOC_EEC_OP_ERR]		= "local EE context operation error",
	[IB_WC_LOC_PROT_ERR]		= "local protection error",
	[IB_WC_WR_FLUSH_ERR]		= "WR flushed",
	[IB_WC_MW_BIND_ERR]		= "memory management operation error",
	[IB_WC_BAD_RESP_ERR]		= "bad response error",
	[IB_WC_LOC_ACCESS_ERR]		= "local access error",
	[IB_WC_REM_INV_REQ_ERR]		= "invalid request error",
	[IB_WC_REM_ACCESS_ERR]		= "remote access error",
	[IB_WC_REM_OP_ERR]		= "remote operation error",
	[IB_WC_RETRY_EXC_ERR]		= "transport retry counter exceeded",
	[IB_WC_RNR_RETRY_EXC_ERR]	= "RNR retry counter exceeded",
	[IB_WC_LOC_RDD_VIOL_ERR]	= "local RDD violation error",
	[IB_WC_REM_INV_RD_REQ_ERR]	= "remote invalid RD request",
	[IB_WC_REM_ABORT_ERR]		= "operation aborted",
	[IB_WC_INV_EECN_ERR]		= "invalid EE context number",
	[IB_WC_INV_EEC_STATE_ERR]	= "invalid EE context state",
	[IB_WC_FATAL_ERR]		= "fatal error",
	[IB_WC_RESP_TIMEOUT_ERR]	= "response timeout error",
	[IB_WC_GENERAL_ERR]		= "general error",
};

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const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
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{
	size_t index = status;

	return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
			wc_statuses[index] : "unrecognized status";
}
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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{
	switch (rate) {
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	case IB_RATE_2_5_GBPS: return   1;
	case IB_RATE_5_GBPS:   return   2;
	case IB_RATE_10_GBPS:  return   4;
	case IB_RATE_20_GBPS:  return   8;
	case IB_RATE_30_GBPS:  return  12;
	case IB_RATE_40_GBPS:  return  16;
	case IB_RATE_60_GBPS:  return  24;
	case IB_RATE_80_GBPS:  return  32;
	case IB_RATE_120_GBPS: return  48;
	case IB_RATE_14_GBPS:  return   6;
	case IB_RATE_56_GBPS:  return  22;
	case IB_RATE_112_GBPS: return  45;
	case IB_RATE_168_GBPS: return  67;
	case IB_RATE_25_GBPS:  return  10;
	case IB_RATE_100_GBPS: return  40;
	case IB_RATE_200_GBPS: return  80;
	case IB_RATE_300_GBPS: return 120;
	default:	       return  -1;
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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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{
	switch (mult) {
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	case 1:   return IB_RATE_2_5_GBPS;
	case 2:   return IB_RATE_5_GBPS;
	case 4:   return IB_RATE_10_GBPS;
	case 8:   return IB_RATE_20_GBPS;
	case 12:  return IB_RATE_30_GBPS;
	case 16:  return IB_RATE_40_GBPS;
	case 24:  return IB_RATE_60_GBPS;
	case 32:  return IB_RATE_80_GBPS;
	case 48:  return IB_RATE_120_GBPS;
	case 6:   return IB_RATE_14_GBPS;
	case 22:  return IB_RATE_56_GBPS;
	case 45:  return IB_RATE_112_GBPS;
	case 67:  return IB_RATE_168_GBPS;
	case 10:  return IB_RATE_25_GBPS;
	case 40:  return IB_RATE_100_GBPS;
	case 80:  return IB_RATE_200_GBPS;
	case 120: return IB_RATE_300_GBPS;
	default:  return IB_RATE_PORT_CURRENT;
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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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{
	switch (rate) {
	case IB_RATE_2_5_GBPS: return 2500;
	case IB_RATE_5_GBPS:   return 5000;
	case IB_RATE_10_GBPS:  return 10000;
	case IB_RATE_20_GBPS:  return 20000;
	case IB_RATE_30_GBPS:  return 30000;
	case IB_RATE_40_GBPS:  return 40000;
	case IB_RATE_60_GBPS:  return 60000;
	case IB_RATE_80_GBPS:  return 80000;
	case IB_RATE_120_GBPS: return 120000;
	case IB_RATE_14_GBPS:  return 14062;
	case IB_RATE_56_GBPS:  return 56250;
	case IB_RATE_112_GBPS: return 112500;
	case IB_RATE_168_GBPS: return 168750;
	case IB_RATE_25_GBPS:  return 25781;
	case IB_RATE_100_GBPS: return 103125;
	case IB_RATE_200_GBPS: return 206250;
	case IB_RATE_300_GBPS: return 309375;
	default:	       return -1;
	}
}
EXPORT_SYMBOL(ib_rate_to_mbps);

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__attribute_const__ enum rdma_transport_type
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rdma_node_get_transport(enum rdma_node_type node_type)
{
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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)
		return RDMA_TRANSPORT_IWARP;

	return RDMA_TRANSPORT_IB;
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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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	enum rdma_transport_type lt;
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	if (device->get_link_layer)
		return device->get_link_layer(device, port_num);

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	lt = rdma_node_get_transport(device->node_type);
	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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}
EXPORT_SYMBOL(rdma_port_get_link_layer);

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/* Protection domains */

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/**
 * ib_alloc_pd - Allocates an unused protection domain.
 * @device: The device on which to allocate the protection domain.
 *
 * A protection domain object provides an association between QPs, shared
 * receive queues, address handles, memory regions, and memory windows.
 *
 * Every PD has a local_dma_lkey which can be used as the lkey value for local
 * memory operations.
 */
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struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
		const char *caller)
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{
	struct ib_pd *pd;
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	int mr_access_flags = 0;
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	pd = device->alloc_pd(device, NULL, NULL);
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	if (IS_ERR(pd))
		return pd;
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	pd->device = device;
	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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	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
		mr_access_flags |= IB_ACCESS_LOCAL_WRITE;

	if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
		pr_warn("%s: enabling unsafe global rkey\n", caller);
		mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
	}

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	pd->res.type = RDMA_RESTRACK_PD;
	pd->res.kern_name = caller;
	rdma_restrack_add(&pd->res);

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	if (mr_access_flags) {
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		struct ib_mr *mr;

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		mr = pd->device->get_dma_mr(pd, mr_access_flags);
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		if (IS_ERR(mr)) {
			ib_dealloc_pd(pd);
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			return ERR_CAST(mr);
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		}
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		mr->device	= pd->device;
		mr->pd		= pd;
		mr->uobject	= NULL;
		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))
			pd->local_dma_lkey = pd->__internal_mr->lkey;

		if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
			pd->unsafe_global_rkey = pd->__internal_mr->rkey;
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	}
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	return pd;
}
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EXPORT_SYMBOL(__ib_alloc_pd);
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/**
 * ib_dealloc_pd - Deallocates a protection domain.
 * @pd: The protection domain to deallocate.
 *
 * It is an error to call this function while any resources in the pd still
 * exist.  The caller is responsible to synchronously destroy them and
 * guarantee no new allocations will happen.
 */
void ib_dealloc_pd(struct ib_pd *pd)
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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->dereg_mr(pd->__internal_mr);
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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
	   requires the caller to guarantee we can't race here. */
	WARN_ON(atomic_read(&pd->usecnt));
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	rdma_restrack_del(&pd->res);
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	/* Making delalloc_pd a void return is a WIP, no driver should return
	   an error here. */
	ret = pd->device->dealloc_pd(pd);
	WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
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}
EXPORT_SYMBOL(ib_dealloc_pd);

/* Address handles */

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/**
 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
 * @dest:       Pointer to destination ah_attr. Contents of the destination
 *              pointer is assumed to be invalid and attribute are overwritten.
 * @src:        Pointer to source ah_attr.
 */
void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
		       const struct rdma_ah_attr *src)
{
	*dest = *src;
	if (dest->grh.sgid_attr)
		rdma_hold_gid_attr(dest->grh.sgid_attr);
}
EXPORT_SYMBOL(rdma_copy_ah_attr);

/**
 * rdma_replace_ah_attr - Replace valid ah_attr with new new one.
 * @old:        Pointer to existing ah_attr which needs to be replaced.
 *              old is assumed to be valid or zero'd
 * @new:        Pointer to the new ah_attr.
 *
 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if
 * old the ah_attr is valid; after that it copies the new attribute and holds
 * the reference to the replaced ah_attr.
 */
void rdma_replace_ah_attr(struct rdma_ah_attr *old,
			  const struct rdma_ah_attr *new)
{
	rdma_destroy_ah_attr(old);
	*old = *new;
	if (old->grh.sgid_attr)
		rdma_hold_gid_attr(old->grh.sgid_attr);
}
EXPORT_SYMBOL(rdma_replace_ah_attr);

/**
 * rdma_move_ah_attr - Move ah_attr pointed by source to destination.
 * @dest:       Pointer to destination ah_attr to copy to.
 *              dest is assumed to be valid or zero'd
 * @src:        Pointer to the new ah_attr.
 *
 * rdma_move_ah_attr() first releases any reference in the destination ah_attr
 * if it is valid. This also transfers ownership of internal references from
 * src to dest, making src invalid in the process. No new reference of the src
 * ah_attr is taken.
 */
void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
{
	rdma_destroy_ah_attr(dest);
	*dest = *src;
	src->grh.sgid_attr = NULL;
}
EXPORT_SYMBOL(rdma_move_ah_attr);

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/*
 * Validate that the rdma_ah_attr is valid for the device before passing it
 * off to the driver.
 */
static int rdma_check_ah_attr(struct ib_device *device,
			      struct rdma_ah_attr *ah_attr)
{
	if (!rdma_is_port_valid(device, ah_attr->port_num))
		return -EINVAL;

	if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE &&
	    !(ah_attr->ah_flags & IB_AH_GRH))
		return -EINVAL;

	if (ah_attr->grh.sgid_attr) {
		/*
		 * Make sure the passed sgid_attr is consistent with the
		 * parameters
		 */
		if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
		    ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
			return -EINVAL;
	}
	return 0;
}

/*
 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
 * On success the caller is responsible to call rdma_unfill_sgid_attr().
 */
static int rdma_fill_sgid_attr(struct ib_device *device,
			       struct rdma_ah_attr *ah_attr,
			       const struct ib_gid_attr **old_sgid_attr)
{
	const struct ib_gid_attr *sgid_attr;
	struct ib_global_route *grh;
	int ret;

	*old_sgid_attr = ah_attr->grh.sgid_attr;

	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);
}

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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;
}

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static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
				     struct rdma_ah_attr *ah_attr,
				     struct ib_udata *udata)
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{
	struct ib_ah *ah;

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	ah = pd->device->create_ah(pd, ah_attr, udata);
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	if (!IS_ERR(ah)) {
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		ah->device  = pd->device;
		ah->pd      = pd;
		ah->uobject = NULL;
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		ah->type    = ah_attr->type;
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		ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);

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		atomic_inc(&pd->usecnt);
	}

	return ah;
}
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/**
 * 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.
 *
 * 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.
 */
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struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr)
{
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	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, NULL);

	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
	return ah;
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}
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EXPORT_SYMBOL(rdma_create_ah);
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/**
 * 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)
{
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	const struct ib_gid_attr *old_sgid_attr;
	struct ib_ah *ah;
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	int err;

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	err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
	if (err)
		return ERR_PTR(err);

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	if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
		err = ib_resolve_eth_dmac(pd->device, ah_attr);
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		if (err) {
			ah = ERR_PTR(err);
			goto out;
		}
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	}

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	ah = _rdma_create_ah(pd, ah_attr, udata);

out:
	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
	return ah;
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}
EXPORT_SYMBOL(rdma_create_user_ah);

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int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
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{
	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;
}
595
EXPORT_SYMBOL(ib_get_rdma_header_version);
596 597 598 599 600 601 602 603 604 605

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;

606
	grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
607 608 609 610 611 612 613 614 615 616

	if (grh_version == 4)
		return RDMA_NETWORK_IPV4;

	if (grh->next_hdr == IPPROTO_UDP)
		return RDMA_NETWORK_IPV6;

	return RDMA_NETWORK_ROCE_V1;
}

617 618
struct find_gid_index_context {
	u16 vlan_id;
619
	enum ib_gid_type gid_type;
620 621 622 623 624 625
};

static bool find_gid_index(const union ib_gid *gid,
			   const struct ib_gid_attr *gid_attr,
			   void *context)
{
626
	struct find_gid_index_context *ctx = context;
627

628 629 630
	if (ctx->gid_type != gid_attr->gid_type)
		return false;

631 632 633 634 635 636 637 638 639 640
	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 int get_sgid_index_from_eth(struct ib_device *device, u8 port_num,
				   u16 vlan_id, const union ib_gid *sgid,
641
				   enum ib_gid_type gid_type,
642 643
				   u16 *gid_index)
{
644 645
	struct find_gid_index_context context = {.vlan_id = vlan_id,
						 .gid_type = gid_type};
646 647 648 649 650

	return ib_find_gid_by_filter(device, sgid, port_num, find_gid_index,
				     &context, gid_index);
}

651 652 653
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)
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682
{
	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;
	}
}
683
EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
684

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
/* 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_gid_attr sgid_attr;
	struct ib_global_route *grh;
	int hop_limit = 0xff;
	union ib_gid sgid;
	int ret;

	grh = rdma_ah_retrieve_grh(ah_attr);

700 701
	ret = ib_get_cached_gid(device, rdma_ah_get_port_num(ah_attr),
				grh->sgid_index, &sgid, &sgid_attr);
702 703 704 705 706 707
	if (ret || !sgid_attr.ndev) {
		if (!ret)
			ret = -ENXIO;
		return ret;
	}

708 709 710 711 712 713 714 715 716 717
	/* 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);
		goto done;
	}

718 719 720
	ret = rdma_addr_find_l2_eth_by_grh(&sgid, &grh->dgid,
					   ah_attr->roce.dmac,
					   sgid_attr.ndev, &hop_limit);
721
done:
722 723 724 725 726 727
	dev_put(sgid_attr.ndev);

	grh->hop_limit = hop_limit;
	return ret;
}

728
/*
729
 * This function initializes address handle attributes from the incoming packet.
730 731 732 733 734 735 736 737
 * 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.
 *
 */
738 739 740
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)
741 742 743 744
{
	u32 flow_class;
	u16 gid_index;
	int ret;
745 746
	enum rdma_network_type net_type = RDMA_NETWORK_IB;
	enum ib_gid_type gid_type = IB_GID_TYPE_IB;
747
	int hoplimit = 0xff;
748 749
	union ib_gid dgid;
	union ib_gid sgid;
750

751 752
	might_sleep();

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753
	memset(ah_attr, 0, sizeof *ah_attr);
754
	ah_attr->type = rdma_ah_find_type(device, port_num);
755
	if (rdma_cap_eth_ah(device, port_num)) {
756 757 758 759 760 761
		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);
	}
762 763
	ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
					&sgid, &dgid);
764 765 766
	if (ret)
		return ret;

767 768 769
	rdma_ah_set_sl(ah_attr, wc->sl);
	rdma_ah_set_port_num(ah_attr, port_num);

770
	if (rdma_protocol_roce(device, port_num)) {
771 772 773
		u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
				wc->vlan_id : 0xffff;

774 775 776
		if (!(wc->wc_flags & IB_WC_GRH))
			return -EPROTOTYPE;

777 778 779
		ret = get_sgid_index_from_eth(device, port_num,
					      vlan_id, &dgid,
					      gid_type, &gid_index);
780 781
		if (ret)
			return ret;
782

783 784 785 786 787 788 789 790 791
		flow_class = be32_to_cpu(grh->version_tclass_flow);
		rdma_ah_set_grh(ah_attr, &sgid,
				flow_class & 0xFFFFF,
				(u8)gid_index, hoplimit,
				(flow_class >> 20) & 0xFF);
		return ib_resolve_unicast_gid_dmac(device, ah_attr);
	} else {
		rdma_ah_set_dlid(ah_attr, wc->slid);
		rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
792

793
		if (wc->wc_flags & IB_WC_GRH) {
794 795 796 797 798 799 800 801 802 803
			if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
				ret = ib_find_cached_gid_by_port(device, &dgid,
								 IB_GID_TYPE_IB,
								 port_num, NULL,
								 &gid_index);
				if (ret)
					return ret;
			} else {
				gid_index = 0;
			}
804

805 806 807 808 809 810 811
			flow_class = be32_to_cpu(grh->version_tclass_flow);
			rdma_ah_set_grh(ah_attr, &sgid,
					flow_class & 0xFFFFF,
					(u8)gid_index, hoplimit,
					(flow_class >> 20) & 0xFF);
		}
		return 0;
812
	}
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}
814
EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
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816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
/**
 * 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);

859 860
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)
S
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{
862
	struct rdma_ah_attr ah_attr;
S
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863 864
	int ret;

865
	ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
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866 867
	if (ret)
		return ERR_PTR(ret);
868

869
	return rdma_create_ah(pd, &ah_attr);
870 871 872
}
EXPORT_SYMBOL(ib_create_ah_from_wc);

873
int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
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{
875 876 877
	const struct ib_gid_attr *old_sgid_attr;
	int ret;

878 879 880
	if (ah->type != ah_attr->type)
		return -EINVAL;

881 882 883 884 885
	ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
	if (ret)
		return ret;

	ret = ah->device->modify_ah ?
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		ah->device->modify_ah(ah, ah_attr) :
887
		-EOPNOTSUPP;
888

889
	ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
890 891
	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
	return ret;
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}
893
EXPORT_SYMBOL(rdma_modify_ah);
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894

895
int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
L
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896
{
897 898
	ah_attr->grh.sgid_attr = NULL;

L
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	return ah->device->query_ah ?
		ah->device->query_ah(ah, ah_attr) :
901
		-EOPNOTSUPP;
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902
}
903
EXPORT_SYMBOL(rdma_query_ah);
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904

905
int rdma_destroy_ah(struct ib_ah *ah)
L
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906
{
907
	const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
L
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908 909 910 911 912
	struct ib_pd *pd;
	int ret;

	pd = ah->pd;
	ret = ah->device->destroy_ah(ah);
913
	if (!ret) {
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		atomic_dec(&pd->usecnt);
915 916 917
		if (sgid_attr)
			rdma_put_gid_attr(sgid_attr);
	}
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918 919 920

	return ret;
}
921
EXPORT_SYMBOL(rdma_destroy_ah);
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922

923 924 925 926 927 928 929 930
/* 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;

	if (!pd->device->create_srq)
931
		return ERR_PTR(-EOPNOTSUPP);
932 933 934 935 936 937 938 939 940

	srq = pd->device->create_srq(pd, srq_init_attr, NULL);

	if (!IS_ERR(srq)) {
		srq->device    	   = pd->device;
		srq->pd        	   = pd;
		srq->uobject       = NULL;
		srq->event_handler = srq_init_attr->event_handler;
		srq->srq_context   = srq_init_attr->srq_context;
S
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941
		srq->srq_type      = srq_init_attr->srq_type;
942 943 944 945
		if (ib_srq_has_cq(srq->srq_type)) {
			srq->ext.cq   = srq_init_attr->ext.cq;
			atomic_inc(&srq->ext.cq->usecnt);
		}
S
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946 947 948 949
		if (srq->srq_type == IB_SRQT_XRC) {
			srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
			atomic_inc(&srq->ext.xrc.xrcd->usecnt);
		}
950 951 952 953 954 955 956 957 958 959 960 961
		atomic_inc(&pd->usecnt);
		atomic_set(&srq->usecnt, 0);
	}

	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)
{
962 963
	return srq->device->modify_srq ?
		srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
964
		-EOPNOTSUPP;
965 966 967 968 969 970 971
}
EXPORT_SYMBOL(ib_modify_srq);

int ib_query_srq(struct ib_srq *srq,
		 struct ib_srq_attr *srq_attr)
{
	return srq->device->query_srq ?
972
		srq->device->query_srq(srq, srq_attr) : -EOPNOTSUPP;
973 974 975 976 977 978
}
EXPORT_SYMBOL(ib_query_srq);

int ib_destroy_srq(struct ib_srq *srq)
{
	struct ib_pd *pd;
S
Sean Hefty 已提交
979 980 981
	enum ib_srq_type srq_type;
	struct ib_xrcd *uninitialized_var(xrcd);
	struct ib_cq *uninitialized_var(cq);
982 983 984 985 986 987
	int ret;

	if (atomic_read(&srq->usecnt))
		return -EBUSY;

	pd = srq->pd;
S
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988
	srq_type = srq->srq_type;
989 990 991
	if (ib_srq_has_cq(srq_type))
		cq = srq->ext.cq;
	if (srq_type == IB_SRQT_XRC)
S
Sean Hefty 已提交
992
		xrcd = srq->ext.xrc.xrcd;
993 994

	ret = srq->device->destroy_srq(srq);
S
Sean Hefty 已提交
995
	if (!ret) {
996
		atomic_dec(&pd->usecnt);
997
		if (srq_type == IB_SRQT_XRC)
S
Sean Hefty 已提交
998
			atomic_dec(&xrcd->usecnt);
999
		if (ib_srq_has_cq(srq_type))
S
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1000 1001
			atomic_dec(&cq->usecnt);
	}
1002 1003 1004 1005 1006

	return ret;
}
EXPORT_SYMBOL(ib_destroy_srq);

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1007 1008
/* Queue pairs */

1009 1010 1011
static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
{
	struct ib_qp *qp = context;
1012
	unsigned long flags;
1013

1014
	spin_lock_irqsave(&qp->device->event_handler_lock, flags);
1015
	list_for_each_entry(event->element.qp, &qp->open_list, open_list)
1016 1017
		if (event->element.qp->event_handler)
			event->element.qp->event_handler(event, event->element.qp->qp_context);
1018
	spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
1019 1020
}

1021 1022 1023 1024 1025 1026 1027
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);
}

1028 1029 1030
static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
				  void (*event_handler)(struct ib_event *, void *),
				  void *qp_context)
1031
{
1032 1033
	struct ib_qp *qp;
	unsigned long flags;
1034
	int err;
1035 1036 1037 1038 1039

	qp = kzalloc(sizeof *qp, GFP_KERNEL);
	if (!qp)
		return ERR_PTR(-ENOMEM);

1040 1041 1042 1043 1044 1045 1046
	qp->real_qp = real_qp;
	err = ib_open_shared_qp_security(qp, real_qp->device);
	if (err) {
		kfree(qp);
		return ERR_PTR(err);
	}

1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
	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);
1071
	mutex_lock(&xrcd->tgt_qp_mutex);
1072 1073 1074 1075 1076 1077 1078
	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;
		}
	}
1079
	mutex_unlock(&xrcd->tgt_qp_mutex);
1080
	return qp;
1081
}
1082
EXPORT_SYMBOL(ib_open_qp);
1083

1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
static struct ib_qp *ib_create_xrc_qp(struct ib_qp *qp,
		struct ib_qp_init_attr *qp_init_attr)
{
	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))
		__ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
	else
		real_qp->device->destroy_qp(real_qp);
	return qp;
}

L
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struct ib_qp *ib_create_qp(struct ib_pd *pd,
			   struct ib_qp_init_attr *qp_init_attr)
{
1110 1111
	struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
	struct ib_qp *qp;
1112 1113
	int ret;

1114 1115 1116 1117 1118 1119
	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);

1120 1121 1122 1123 1124 1125 1126 1127
	/*
	 * 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);
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1129
	qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL);
1130 1131 1132
	if (IS_ERR(qp))
		return qp;

1133 1134 1135 1136 1137 1138
	ret = ib_create_qp_security(qp, device);
	if (ret) {
		ib_destroy_qp(qp);
		return ERR_PTR(ret);
	}

1139 1140
	qp->real_qp    = qp;
	qp->qp_type    = qp_init_attr->qp_type;
1141
	qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
1142 1143

	atomic_set(&qp->usecnt, 0);
1144 1145
	qp->mrs_used = 0;
	spin_lock_init(&qp->mr_lock);
1146
	INIT_LIST_HEAD(&qp->rdma_mrs);
1147
	INIT_LIST_HEAD(&qp->sig_mrs);
1148
	qp->port = 0;
1149

1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
	if (qp_init_attr->qp_type == IB_QPT_XRC_TGT)
		return ib_create_xrc_qp(qp, qp_init_attr);

	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;
1160 1161
		if (qp_init_attr->recv_cq)
			atomic_inc(&qp_init_attr->recv_cq->usecnt);
1162 1163 1164
		qp->srq = qp_init_attr->srq;
		if (qp->srq)
			atomic_inc(&qp_init_attr->srq->usecnt);
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	}

1167 1168 1169 1170
	qp->send_cq = qp_init_attr->send_cq;
	qp->xrcd    = NULL;

	atomic_inc(&pd->usecnt);
1171 1172 1173 1174
	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);
1175 1176 1177 1178 1179 1180

	if (qp_init_attr->cap.max_rdma_ctxs) {
		ret = rdma_rw_init_mrs(qp, qp_init_attr);
		if (ret) {
			pr_err("failed to init MR pool ret= %d\n", ret);
			ib_destroy_qp(qp);
1181
			return ERR_PTR(ret);
1182 1183 1184
		}
	}

1185 1186 1187 1188 1189 1190 1191 1192 1193
	/*
	 * 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);

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	return qp;
}
EXPORT_SYMBOL(ib_create_qp);

1198 1199
static const struct {
	int			valid;
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	enum ib_qp_attr_mask	req_param[IB_QPT_MAX];
	enum ib_qp_attr_mask	opt_param[IB_QPT_MAX];
1202 1203 1204 1205 1206 1207 1208 1209 1210
} 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),
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				[IB_QPT_RAW_PACKET] = IB_QP_PORT,
1212 1213 1214 1215 1216 1217
				[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),
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				[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),
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
				[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),
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				[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),
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
				[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),
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				[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),
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
			},
			.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),
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				 [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),
1297 1298 1299 1300
				 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
						 IB_QP_QKEY),
				 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
						 IB_QP_QKEY),
1301
			 },
1302
		},
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316
	},
	[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),
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				[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),
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
				[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),
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				 [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),
1348 1349 1350 1351
				 [IB_QPT_SMI] = (IB_QP_CUR_STATE		|
						 IB_QP_QKEY),
				 [IB_QPT_GSI] = (IB_QP_CUR_STATE		|
						 IB_QP_QKEY),
1352
				 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363
			 }
		}
	},
	[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),
1364 1365
				[IB_QPT_UC]  = (IB_QP_CUR_STATE			|
						IB_QP_ACCESS_FLAGS		|
1366 1367
						IB_QP_ALT_PATH			|
						IB_QP_PATH_MIG_STATE),
1368 1369
				[IB_QPT_RC]  = (IB_QP_CUR_STATE			|
						IB_QP_ACCESS_FLAGS		|
1370 1371 1372
						IB_QP_ALT_PATH			|
						IB_QP_PATH_MIG_STATE		|
						IB_QP_MIN_RNR_TIMER),
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				[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),
1382 1383 1384 1385
				[IB_QPT_SMI] = (IB_QP_CUR_STATE			|
						IB_QP_QKEY),
				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
						IB_QP_QKEY),
1386
				[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1387 1388 1389 1390 1391 1392 1393 1394
			}
		},
		[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,
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				[IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
				[IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
				[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),
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				[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),
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
				[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),
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				[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),
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
				[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 }
	}
};

1505 1506 1507
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 rdma_link_layer ll)
1508 1509 1510 1511 1512 1513
{
	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)
1514
		return false;
1515 1516

	if (!qp_state_table[cur_state][next_state].valid)
1517
		return false;
1518 1519 1520 1521 1522

	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)
1523
		return false;
1524 1525

	if (mask & ~(req_param | opt_param | IB_QP_STATE))
1526
		return false;
1527

1528
	return true;
1529 1530 1531
}
EXPORT_SYMBOL(ib_modify_qp_is_ok);

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/**
 * 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.
 */
1541 1542
static int ib_resolve_eth_dmac(struct ib_device *device,
			       struct rdma_ah_attr *ah_attr)
1543
{
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	int ret = 0;
1545

1546 1547 1548 1549 1550 1551 1552 1553 1554 1555
	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);
		}
1556
	} else {
1557
		ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1558 1559 1560 1561
	}
	return ret;
}

1562 1563 1564 1565 1566 1567 1568 1569
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);
}

1570
/**
1571
 * IB core internal function to perform QP attributes modification.
1572
 */
1573 1574
static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
			 int attr_mask, struct ib_udata *udata)
L
Linus Torvalds 已提交
1575
{
1576
	u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1577 1578
	const struct ib_gid_attr *old_sgid_attr_av;
	const struct ib_gid_attr *old_sgid_attr_alt_av;
1579
	int ret;
1580

1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
	/*
	 * Today the core code can only handle alternate paths and APM for IB
	 * ban them in roce mode.
	 */
	if (attr_mask & IB_QP_ALT_PATH &&
	    !rdma_protocol_ib(qp->device, attr->alt_ah_attr.port_num))
		return -EINVAL;

	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) {
1596 1597 1598 1599 1600 1601 1602
		/*
		 * 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.
		 */
1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
		ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
					  &old_sgid_attr_alt_av);
		if (ret)
			goto out_av;
	}

	/*
	 * 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;
	}

1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634
	if (rdma_ib_or_roce(qp->device, port)) {
		if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
			pr_warn("%s: %s rq_psn overflow, masking to 24 bits\n",
				__func__, qp->device->name);
			attr->rq_psn &= 0xffffff;
		}

		if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
			pr_warn("%s: %s sq_psn overflow, masking to 24 bits\n",
				__func__, qp->device->name);
			attr->sq_psn &= 0xffffff;
		}
	}

1635
	ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
1636 1637 1638 1639
	if (ret)
		goto out;

	if (attr_mask & IB_QP_PORT)
1640
		qp->port = attr->port_num;
1641 1642 1643 1644 1645 1646
	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);
1647

1648 1649 1650 1651 1652 1653
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);
1654
	return ret;
1655
}
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670

/**
 * 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)
{
1671
	return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
1672
}
1673
EXPORT_SYMBOL(ib_modify_qp_with_udata);
1674

1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
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;

	if (!dev->get_netdev)
		return -EOPNOTSUPP;

	netdev = dev->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);

1730 1731 1732 1733
int ib_modify_qp(struct ib_qp *qp,
		 struct ib_qp_attr *qp_attr,
		 int qp_attr_mask)
{
1734
	return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
L
Linus Torvalds 已提交
1735 1736 1737 1738 1739 1740 1741 1742
}
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)
{
1743 1744 1745
	qp_attr->ah_attr.grh.sgid_attr = NULL;
	qp_attr->alt_ah_attr.grh.sgid_attr = NULL;

L
Linus Torvalds 已提交
1746
	return qp->device->query_qp ?
1747
		qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1748
		-EOPNOTSUPP;
L
Linus Torvalds 已提交
1749 1750 1751
}
EXPORT_SYMBOL(ib_query_qp);

1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765
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);
1766 1767
	if (qp->qp_sec)
		ib_close_shared_qp_security(qp->qp_sec);
1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801
	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;
}

L
Linus Torvalds 已提交
1802 1803
int ib_destroy_qp(struct ib_qp *qp)
{
1804 1805
	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;
L
Linus Torvalds 已提交
1806 1807 1808
	struct ib_pd *pd;
	struct ib_cq *scq, *rcq;
	struct ib_srq *srq;
1809
	struct ib_rwq_ind_table *ind_tbl;
1810
	struct ib_qp_security *sec;
L
Linus Torvalds 已提交
1811 1812
	int ret;

1813 1814
	WARN_ON_ONCE(qp->mrs_used > 0);

1815 1816 1817 1818 1819 1820
	if (atomic_read(&qp->usecnt))
		return -EBUSY;

	if (qp->real_qp != qp)
		return __ib_destroy_shared_qp(qp);

S
Sean Hefty 已提交
1821 1822 1823 1824
	pd   = qp->pd;
	scq  = qp->send_cq;
	rcq  = qp->recv_cq;
	srq  = qp->srq;
1825
	ind_tbl = qp->rwq_ind_tbl;
1826 1827 1828
	sec  = qp->qp_sec;
	if (sec)
		ib_destroy_qp_security_begin(sec);
L
Linus Torvalds 已提交
1829

1830 1831 1832
	if (!qp->uobject)
		rdma_rw_cleanup_mrs(qp);

1833
	rdma_restrack_del(&qp->res);
L
Linus Torvalds 已提交
1834 1835
	ret = qp->device->destroy_qp(qp);
	if (!ret) {
1836 1837 1838 1839
		if (alt_path_sgid_attr)
			rdma_put_gid_attr(alt_path_sgid_attr);
		if (av_sgid_attr)
			rdma_put_gid_attr(av_sgid_attr);
S
Sean Hefty 已提交
1840 1841 1842 1843 1844 1845
		if (pd)
			atomic_dec(&pd->usecnt);
		if (scq)
			atomic_dec(&scq->usecnt);
		if (rcq)
			atomic_dec(&rcq->usecnt);
L
Linus Torvalds 已提交
1846 1847
		if (srq)
			atomic_dec(&srq->usecnt);
1848 1849
		if (ind_tbl)
			atomic_dec(&ind_tbl->usecnt);
1850 1851 1852 1853 1854
		if (sec)
			ib_destroy_qp_security_end(sec);
	} else {
		if (sec)
			ib_destroy_qp_security_abort(sec);
L
Linus Torvalds 已提交
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
	}

	return ret;
}
EXPORT_SYMBOL(ib_destroy_qp);

/* Completion queues */

struct ib_cq *ib_create_cq(struct ib_device *device,
			   ib_comp_handler comp_handler,
			   void (*event_handler)(struct ib_event *, void *),
1866 1867
			   void *cq_context,
			   const struct ib_cq_init_attr *cq_attr)
L
Linus Torvalds 已提交
1868 1869 1870
{
	struct ib_cq *cq;

1871
	cq = device->create_cq(device, cq_attr, NULL, NULL);
L
Linus Torvalds 已提交
1872 1873 1874

	if (!IS_ERR(cq)) {
		cq->device        = device;
1875
		cq->uobject       = NULL;
L
Linus Torvalds 已提交
1876 1877 1878 1879
		cq->comp_handler  = comp_handler;
		cq->event_handler = event_handler;
		cq->cq_context    = cq_context;
		atomic_set(&cq->usecnt, 0);
1880 1881
		cq->res.type = RDMA_RESTRACK_CQ;
		rdma_restrack_add(&cq->res);
L
Linus Torvalds 已提交
1882 1883 1884 1885 1886 1887
	}

	return cq;
}
EXPORT_SYMBOL(ib_create_cq);

1888
int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
E
Eli Cohen 已提交
1889 1890
{
	return cq->device->modify_cq ?
1891
		cq->device->modify_cq(cq, cq_count, cq_period) : -EOPNOTSUPP;
E
Eli Cohen 已提交
1892
}
1893
EXPORT_SYMBOL(rdma_set_cq_moderation);
E
Eli Cohen 已提交
1894

L
Linus Torvalds 已提交
1895 1896 1897 1898 1899
int ib_destroy_cq(struct ib_cq *cq)
{
	if (atomic_read(&cq->usecnt))
		return -EBUSY;

1900
	rdma_restrack_del(&cq->res);
L
Linus Torvalds 已提交
1901 1902 1903 1904
	return cq->device->destroy_cq(cq);
}
EXPORT_SYMBOL(ib_destroy_cq);

R
Roland Dreier 已提交
1905
int ib_resize_cq(struct ib_cq *cq, int cqe)
L
Linus Torvalds 已提交
1906
{
1907
	return cq->device->resize_cq ?
1908
		cq->device->resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
L
Linus Torvalds 已提交
1909 1910 1911 1912 1913 1914 1915
}
EXPORT_SYMBOL(ib_resize_cq);

/* Memory regions */

int ib_dereg_mr(struct ib_mr *mr)
{
1916
	struct ib_pd *pd = mr->pd;
1917
	struct ib_dm *dm = mr->dm;
L
Linus Torvalds 已提交
1918 1919
	int ret;

1920
	rdma_restrack_del(&mr->res);
L
Linus Torvalds 已提交
1921
	ret = mr->device->dereg_mr(mr);
1922
	if (!ret) {
L
Linus Torvalds 已提交
1923
		atomic_dec(&pd->usecnt);
1924 1925 1926
		if (dm)
			atomic_dec(&dm->usecnt);
	}
L
Linus Torvalds 已提交
1927 1928 1929 1930 1931

	return ret;
}
EXPORT_SYMBOL(ib_dereg_mr);

S
Sagi Grimberg 已提交
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
/**
 * ib_alloc_mr() - 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.
 *
 * 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(struct ib_pd *pd,
			  enum ib_mr_type mr_type,
			  u32 max_num_sg)
1947 1948 1949
{
	struct ib_mr *mr;

1950
	if (!pd->device->alloc_mr)
1951
		return ERR_PTR(-EOPNOTSUPP);
1952

1953
	mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1954 1955 1956
	if (!IS_ERR(mr)) {
		mr->device  = pd->device;
		mr->pd      = pd;
1957
		mr->dm      = NULL;
1958 1959
		mr->uobject = NULL;
		atomic_inc(&pd->usecnt);
1960
		mr->need_inval = false;
1961 1962
		mr->res.type = RDMA_RESTRACK_MR;
		rdma_restrack_add(&mr->res);
1963 1964 1965 1966
	}

	return mr;
}
1967
EXPORT_SYMBOL(ib_alloc_mr);
1968

L
Linus Torvalds 已提交
1969 1970 1971 1972 1973 1974 1975 1976 1977
/* "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->alloc_fmr)
1978
		return ERR_PTR(-EOPNOTSUPP);
L
Linus Torvalds 已提交
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

	fmr = pd->device->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->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->dealloc_fmr(fmr);
	if (!ret)
		atomic_dec(&pd->usecnt);

	return ret;
}
EXPORT_SYMBOL(ib_dealloc_fmr);

/* Multicast groups */

2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
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) {
A
Alex Estrin 已提交
2031
			if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
2032 2033 2034 2035 2036 2037 2038 2039
			    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++)
A
Alex Estrin 已提交
2040
		if (rdma_port_get_link_layer(qp->device, port) !=
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056
		    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));
}

L
Linus Torvalds 已提交
2057 2058
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
2059 2060
	int ret;

2061
	if (!qp->device->attach_mcast)
2062
		return -EOPNOTSUPP;
2063 2064 2065

	if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
	    qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2066 2067
		return -EINVAL;

2068 2069 2070 2071
	ret = qp->device->attach_mcast(qp, gid, lid);
	if (!ret)
		atomic_inc(&qp->usecnt);
	return ret;
L
Linus Torvalds 已提交
2072 2073 2074 2075 2076
}
EXPORT_SYMBOL(ib_attach_mcast);

int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
2077 2078
	int ret;

2079
	if (!qp->device->detach_mcast)
2080
		return -EOPNOTSUPP;
2081 2082 2083

	if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
	    qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2084 2085
		return -EINVAL;

2086 2087 2088 2089
	ret = qp->device->detach_mcast(qp, gid, lid);
	if (!ret)
		atomic_dec(&qp->usecnt);
	return ret;
L
Linus Torvalds 已提交
2090 2091
}
EXPORT_SYMBOL(ib_detach_mcast);
S
Sean Hefty 已提交
2092

2093
struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
S
Sean Hefty 已提交
2094 2095 2096 2097
{
	struct ib_xrcd *xrcd;

	if (!device->alloc_xrcd)
2098
		return ERR_PTR(-EOPNOTSUPP);
S
Sean Hefty 已提交
2099 2100 2101 2102

	xrcd = device->alloc_xrcd(device, NULL, NULL);
	if (!IS_ERR(xrcd)) {
		xrcd->device = device;
2103
		xrcd->inode = NULL;
S
Sean Hefty 已提交
2104
		atomic_set(&xrcd->usecnt, 0);
2105 2106
		mutex_init(&xrcd->tgt_qp_mutex);
		INIT_LIST_HEAD(&xrcd->tgt_qp_list);
S
Sean Hefty 已提交
2107 2108 2109 2110
	}

	return xrcd;
}
2111
EXPORT_SYMBOL(__ib_alloc_xrcd);
S
Sean Hefty 已提交
2112 2113 2114

int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
{
2115 2116 2117
	struct ib_qp *qp;
	int ret;

S
Sean Hefty 已提交
2118 2119 2120
	if (atomic_read(&xrcd->usecnt))
		return -EBUSY;

2121 2122 2123 2124 2125 2126 2127
	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;
	}

S
Sean Hefty 已提交
2128 2129 2130
	return xrcd->device->dealloc_xrcd(xrcd);
}
EXPORT_SYMBOL(ib_dealloc_xrcd);
2131

2132 2133 2134 2135
/**
 * ib_create_wq - Creates a WQ associated with the specified protection
 * domain.
 * @pd: The protection domain associated with the WQ.
2136
 * @wq_attr: A list of initial attributes required to create the
2137 2138 2139
 * WQ. If WQ creation succeeds, then the attributes are updated to
 * the actual capabilities of the created WQ.
 *
2140
 * wq_attr->max_wr and wq_attr->max_sge determine
2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151
 * 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->create_wq)
2152
		return ERR_PTR(-EOPNOTSUPP);
2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206

	wq = pd->device->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 WQ.
 * @wq: The WQ to destroy.
 */
int ib_destroy_wq(struct ib_wq *wq)
{
	int err;
	struct ib_cq *cq = wq->cq;
	struct ib_pd *pd = wq->pd;

	if (atomic_read(&wq->usecnt))
		return -EBUSY;

	err = wq->device->destroy_wq(wq);
	if (!err) {
		atomic_dec(&pd->usecnt);
		atomic_dec(&cq->usecnt);
	}
	return err;
}
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->modify_wq)
2207
		return -EOPNOTSUPP;
2208 2209 2210 2211 2212 2213

	err = wq->device->modify_wq(wq, wq_attr, wq_attr_mask, NULL);
	return err;
}
EXPORT_SYMBOL(ib_modify_wq);

2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231
/*
 * 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->create_rwq_ind_table)
2232
		return ERR_PTR(-EOPNOTSUPP);
2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275

	table_size = (1 << init_attr->log_ind_tbl_size);
	rwq_ind_table = device->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->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);

2276 2277 2278 2279 2280 2281
struct ib_flow *ib_create_flow(struct ib_qp *qp,
			       struct ib_flow_attr *flow_attr,
			       int domain)
{
	struct ib_flow *flow_id;
	if (!qp->device->create_flow)
2282
		return ERR_PTR(-EOPNOTSUPP);
2283

2284
	flow_id = qp->device->create_flow(qp, flow_attr, domain, NULL);
M
Mark Bloch 已提交
2285
	if (!IS_ERR(flow_id)) {
2286
		atomic_inc(&qp->usecnt);
M
Mark Bloch 已提交
2287 2288
		flow_id->qp = qp;
	}
2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
	return flow_id;
}
EXPORT_SYMBOL(ib_create_flow);

int ib_destroy_flow(struct ib_flow *flow_id)
{
	int err;
	struct ib_qp *qp = flow_id->qp;

	err = qp->device->destroy_flow(flow_id);
	if (!err)
		atomic_dec(&qp->usecnt);
	return err;
}
EXPORT_SYMBOL(ib_destroy_flow);
2304 2305 2306 2307 2308

int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
		       struct ib_mr_status *mr_status)
{
	return mr->device->check_mr_status ?
2309
		mr->device->check_mr_status(mr, check_mask, mr_status) : -EOPNOTSUPP;
2310 2311
}
EXPORT_SYMBOL(ib_check_mr_status);
2312

2313 2314 2315 2316
int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
			 int state)
{
	if (!device->set_vf_link_state)
2317
		return -EOPNOTSUPP;
2318 2319 2320 2321 2322 2323 2324 2325 2326

	return device->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->get_vf_config)
2327
		return -EOPNOTSUPP;
2328 2329 2330 2331 2332 2333 2334 2335 2336

	return device->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->get_vf_stats)
2337
		return -EOPNOTSUPP;
2338 2339 2340 2341 2342 2343 2344 2345 2346

	return device->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->set_vf_guid)
2347
		return -EOPNOTSUPP;
2348 2349 2350 2351 2352

	return device->set_vf_guid(device, vf, port, guid, type);
}
EXPORT_SYMBOL(ib_set_vf_guid);

2353 2354 2355 2356 2357 2358
/**
 * 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
2359
 * @sg_offset:     offset in bytes into sg
2360 2361 2362 2363
 * @page_size:     page vector desired page size
 *
 * Constraints:
 * - The first sg element is allowed to have an offset.
2364 2365 2366
 * - 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.
2367 2368 2369
 * - 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.
2370
 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2371
 *   constraints holds and the page_size argument is ignored.
2372 2373 2374 2375 2376 2377
 *
 * Returns the number of sg elements that were mapped to the memory region.
 *
 * After this completes successfully, the  memory region
 * is ready for registration.
 */
2378
int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2379
		 unsigned int *sg_offset, unsigned int page_size)
2380 2381
{
	if (unlikely(!mr->device->map_mr_sg))
2382
		return -EOPNOTSUPP;
2383 2384 2385

	mr->page_size = page_size;

2386
	return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
2387 2388 2389 2390 2391 2392 2393 2394 2395
}
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
2396 2397 2398 2399
 * @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.
2400 2401
 * @set_page:      driver page assignment function pointer
 *
B
Bart Van Assche 已提交
2402
 * Core service helper for drivers to convert the largest
2403 2404 2405 2406 2407 2408 2409
 * 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.
 */
2410
int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2411
		unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2412 2413
{
	struct scatterlist *sg;
2414
	u64 last_end_dma_addr = 0;
2415
	unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2416 2417
	unsigned int last_page_off = 0;
	u64 page_mask = ~((u64)mr->page_size - 1);
B
Bart Van Assche 已提交
2418
	int i, ret;
2419

2420 2421 2422
	if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
		return -EINVAL;

2423
	mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2424 2425 2426
	mr->length = 0;

	for_each_sg(sgl, sg, sg_nents, i) {
2427
		u64 dma_addr = sg_dma_address(sg) + sg_offset;
2428
		u64 prev_addr = dma_addr;
2429
		unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2430 2431 2432
		u64 end_dma_addr = dma_addr + dma_len;
		u64 page_addr = dma_addr & page_mask;

B
Bart Van Assche 已提交
2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448
		/*
		 * 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;
2449 2450 2451
		}

		do {
B
Bart Van Assche 已提交
2452
			ret = set_page(mr, page_addr);
2453 2454 2455 2456 2457 2458 2459 2460
			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;
B
Bart Van Assche 已提交
2461
next_page:
2462 2463 2464 2465 2466 2467
			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;
2468 2469

		sg_offset = 0;
2470 2471
	}

2472 2473
	if (sg_offset_p)
		*sg_offset_p = 0;
2474 2475 2476
	return i;
}
EXPORT_SYMBOL(ib_sg_to_pages);
2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495

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)
{
2496
	struct ib_cq *cq = qp->send_cq;
2497 2498
	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
	struct ib_drain_cqe sdrain;
2499 2500 2501
	struct ib_send_wr *bad_swr;
	struct ib_rdma_wr swr = {
		.wr = {
2502 2503
			.next = NULL,
			{ .wr_cqe	= &sdrain.cqe, },
2504 2505 2506
			.opcode	= IB_WR_RDMA_WRITE,
		},
	};
2507 2508 2509 2510 2511 2512 2513 2514
	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;
	}

2515 2516 2517
	sdrain.cqe.done = ib_drain_qp_done;
	init_completion(&sdrain.done);

2518
	ret = ib_post_send(qp, &swr.wr, &bad_swr);
2519 2520 2521 2522 2523
	if (ret) {
		WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
		return;
	}

2524 2525 2526 2527 2528
	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);
2529 2530 2531 2532 2533 2534 2535
}

/*
 * Post a WR and block until its completion is reaped for the RQ.
 */
static void __ib_drain_rq(struct ib_qp *qp)
{
2536
	struct ib_cq *cq = qp->recv_cq;
2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547
	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
	struct ib_drain_cqe rdrain;
	struct ib_recv_wr rwr = {}, *bad_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;
	}

2548 2549 2550 2551
	rwr.wr_cqe = &rdrain.cqe;
	rdrain.cqe.done = ib_drain_qp_done;
	init_completion(&rdrain.done);

2552 2553 2554 2555 2556 2557
	ret = ib_post_recv(qp, &rwr, &bad_rwr);
	if (ret) {
		WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
		return;
	}

2558 2559 2560 2561 2562
	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);
2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578
}

/**
 * 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.
 *
2579
 * allocate the CQ using ib_alloc_cq().
2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606
 *
 * 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->drain_sq)
		qp->device->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.
 *
2607
 * allocate the CQ using ib_alloc_cq().
2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630
 *
 * 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->drain_rq)
		qp->device->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.
 *
2631
 * allocate the CQs using ib_alloc_cq().
2632 2633 2634 2635 2636 2637 2638
 *
 * 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);
2639 2640
	if (!qp->srq)
		ib_drain_rq(qp);
2641 2642
}
EXPORT_SYMBOL(ib_drain_qp);