verbs.c 69.0 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;

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	if ((rdma_is_grh_required(device, ah_attr->port_num) ||
	     ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&
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	    !(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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	if (!pd->device->create_ah)
		return ERR_PTR(-EOPNOTSUPP);

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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)
569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598
{
	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;
}
599
EXPORT_SYMBOL(ib_get_rdma_header_version);
600 601 602 603 604 605 606 607 608 609

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;

610
	grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
611 612 613 614 615 616 617 618 619 620

	if (grh_version == 4)
		return RDMA_NETWORK_IPV4;

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

	return RDMA_NETWORK_ROCE_V1;
}

621 622
struct find_gid_index_context {
	u16 vlan_id;
623
	enum ib_gid_type gid_type;
624 625 626 627 628 629
};

static bool find_gid_index(const union ib_gid *gid,
			   const struct ib_gid_attr *gid_attr,
			   void *context)
{
630
	struct find_gid_index_context *ctx = context;
631

632 633 634
	if (ctx->gid_type != gid_attr->gid_type)
		return false;

635 636 637 638 639 640 641 642
	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;
}

643 644 645 646
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)
647
{
648 649
	struct find_gid_index_context context = {.vlan_id = vlan_id,
						 .gid_type = gid_type};
650

651 652
	return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
				       &context);
653 654
}

655 656 657
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)
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686
{
	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;
	}
}
687
EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
688

689 690 691 692 693 694 695
/* 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)
{
696 697
	struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
	const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
698
	int hop_limit = 0xff;
699
	int ret = 0;
700

701 702 703 704
	/* 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) &&
705
	    sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
706 707
		rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
				ah_attr->roce.dmac);
708
		return ret;
709 710
	}

711
	ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
712
					   ah_attr->roce.dmac,
713
					   sgid_attr->ndev, &hop_limit);
714 715 716 717 718

	grh->hop_limit = hop_limit;
	return ret;
}

719
/*
720
 * This function initializes address handle attributes from the incoming packet.
721 722 723 724 725 726 727
 * 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.
 *
728 729
 * On success the caller is responsible to call rdma_destroy_ah_attr on the
 * attr.
730
 */
731 732 733
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)
734 735 736
{
	u32 flow_class;
	int ret;
737 738
	enum rdma_network_type net_type = RDMA_NETWORK_IB;
	enum ib_gid_type gid_type = IB_GID_TYPE_IB;
739
	const struct ib_gid_attr *sgid_attr;
740
	int hoplimit = 0xff;
741 742
	union ib_gid dgid;
	union ib_gid sgid;
743

744 745
	might_sleep();

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	memset(ah_attr, 0, sizeof *ah_attr);
747
	ah_attr->type = rdma_ah_find_type(device, port_num);
748
	if (rdma_cap_eth_ah(device, port_num)) {
749 750 751 752 753 754
		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);
	}
755 756
	ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
					&sgid, &dgid);
757 758 759
	if (ret)
		return ret;

760 761 762
	rdma_ah_set_sl(ah_attr, wc->sl);
	rdma_ah_set_port_num(ah_attr, port_num);

763
	if (rdma_protocol_roce(device, port_num)) {
764 765 766
		u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
				wc->vlan_id : 0xffff;

767 768 769
		if (!(wc->wc_flags & IB_WC_GRH))
			return -EPROTOTYPE;

770 771 772 773 774
		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);
775

776
		flow_class = be32_to_cpu(grh->version_tclass_flow);
777 778 779 780 781 782 783 784 785 786 787 788
		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;
789 790 791
	} else {
		rdma_ah_set_dlid(ah_attr, wc->slid);
		rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
792

793 794 795 796 797 798 799 800 801 802 803 804 805 806 807
		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,
808
					flow_class & 0xFFFFF,
809 810 811 812
					hoplimit,
					(flow_class >> 20) & 0xFF,
					sgid_attr);

813
		return 0;
814
	}
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}
816
EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
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818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860
/**
 * 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);

861 862
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)
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{
864
	struct rdma_ah_attr ah_attr;
865
	struct ib_ah *ah;
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	int ret;

868
	ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
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	if (ret)
		return ERR_PTR(ret);
871

872 873 874 875
	ah = rdma_create_ah(pd, &ah_attr);

	rdma_destroy_ah_attr(&ah_attr);
	return ah;
876 877 878
}
EXPORT_SYMBOL(ib_create_ah_from_wc);

879
int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
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{
881 882 883
	const struct ib_gid_attr *old_sgid_attr;
	int ret;

884 885 886
	if (ah->type != ah_attr->type)
		return -EINVAL;

887 888 889 890 891
	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) :
893
		-EOPNOTSUPP;
894

895
	ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
896 897
	rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
	return ret;
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}
899
EXPORT_SYMBOL(rdma_modify_ah);
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901
int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
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{
903 904
	ah_attr->grh.sgid_attr = NULL;

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	return ah->device->query_ah ?
		ah->device->query_ah(ah, ah_attr) :
907
		-EOPNOTSUPP;
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}
909
EXPORT_SYMBOL(rdma_query_ah);
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911
int rdma_destroy_ah(struct ib_ah *ah)
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{
913
	const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
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	struct ib_pd *pd;
	int ret;

	pd = ah->pd;
	ret = ah->device->destroy_ah(ah);
919
	if (!ret) {
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		atomic_dec(&pd->usecnt);
921 922 923
		if (sgid_attr)
			rdma_put_gid_attr(sgid_attr);
	}
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	return ret;
}
927
EXPORT_SYMBOL(rdma_destroy_ah);
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929 930 931 932 933 934 935 936
/* 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)
937
		return ERR_PTR(-EOPNOTSUPP);
938 939 940 941 942 943 944 945 946

	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;
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		srq->srq_type      = srq_init_attr->srq_type;
948 949 950 951
		if (ib_srq_has_cq(srq->srq_type)) {
			srq->ext.cq   = srq_init_attr->ext.cq;
			atomic_inc(&srq->ext.cq->usecnt);
		}
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		if (srq->srq_type == IB_SRQT_XRC) {
			srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
			atomic_inc(&srq->ext.xrc.xrcd->usecnt);
		}
956 957 958 959 960 961 962 963 964 965 966 967
		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)
{
968 969
	return srq->device->modify_srq ?
		srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
970
		-EOPNOTSUPP;
971 972 973 974 975 976 977
}
EXPORT_SYMBOL(ib_modify_srq);

int ib_query_srq(struct ib_srq *srq,
		 struct ib_srq_attr *srq_attr)
{
	return srq->device->query_srq ?
978
		srq->device->query_srq(srq, srq_attr) : -EOPNOTSUPP;
979 980 981 982 983 984
}
EXPORT_SYMBOL(ib_query_srq);

int ib_destroy_srq(struct ib_srq *srq)
{
	struct ib_pd *pd;
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	enum ib_srq_type srq_type;
	struct ib_xrcd *uninitialized_var(xrcd);
	struct ib_cq *uninitialized_var(cq);
988 989 990 991 992 993
	int ret;

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

	pd = srq->pd;
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	srq_type = srq->srq_type;
995 996 997
	if (ib_srq_has_cq(srq_type))
		cq = srq->ext.cq;
	if (srq_type == IB_SRQT_XRC)
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		xrcd = srq->ext.xrc.xrcd;
999 1000

	ret = srq->device->destroy_srq(srq);
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	if (!ret) {
1002
		atomic_dec(&pd->usecnt);
1003
		if (srq_type == IB_SRQT_XRC)
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			atomic_dec(&xrcd->usecnt);
1005
		if (ib_srq_has_cq(srq_type))
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			atomic_dec(&cq->usecnt);
	}
1008 1009 1010 1011 1012

	return ret;
}
EXPORT_SYMBOL(ib_destroy_srq);

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/* Queue pairs */

1015 1016 1017
static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
{
	struct ib_qp *qp = context;
1018
	unsigned long flags;
1019

1020
	spin_lock_irqsave(&qp->device->event_handler_lock, flags);
1021
	list_for_each_entry(event->element.qp, &qp->open_list, open_list)
1022 1023
		if (event->element.qp->event_handler)
			event->element.qp->event_handler(event, event->element.qp->qp_context);
1024
	spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
1025 1026
}

1027 1028 1029 1030 1031 1032 1033
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);
}

1034 1035 1036
static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
				  void (*event_handler)(struct ib_event *, void *),
				  void *qp_context)
1037
{
1038 1039
	struct ib_qp *qp;
	unsigned long flags;
1040
	int err;
1041 1042 1043 1044 1045

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

1046 1047 1048 1049 1050 1051 1052
	qp->real_qp = real_qp;
	err = ib_open_shared_qp_security(qp, real_qp->device);
	if (err) {
		kfree(qp);
		return ERR_PTR(err);
	}

1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
	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);
1077
	mutex_lock(&xrcd->tgt_qp_mutex);
1078 1079 1080 1081 1082 1083 1084
	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;
		}
	}
1085
	mutex_unlock(&xrcd->tgt_qp_mutex);
1086
	return qp;
1087
}
1088
EXPORT_SYMBOL(ib_open_qp);
1089

1090 1091
static struct ib_qp *create_xrc_qp(struct ib_qp *qp,
				   struct ib_qp_init_attr *qp_init_attr)
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
{
	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);
1106 1107 1108 1109
	if (IS_ERR(qp))
		return qp;

	__ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
1110 1111 1112
	return qp;
}

L
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1113 1114 1115
struct ib_qp *ib_create_qp(struct ib_pd *pd,
			   struct ib_qp_init_attr *qp_init_attr)
{
1116 1117
	struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
	struct ib_qp *qp;
1118 1119
	int ret;

1120 1121 1122 1123 1124 1125
	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);

1126 1127 1128 1129 1130 1131 1132 1133
	/*
	 * 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);
L
Linus Torvalds 已提交
1134

1135
	qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL);
1136 1137 1138
	if (IS_ERR(qp))
		return qp;

1139
	ret = ib_create_qp_security(qp, device);
1140 1141
	if (ret)
		goto err;
1142

1143 1144
	qp->real_qp    = qp;
	qp->qp_type    = qp_init_attr->qp_type;
1145
	qp->rwq_ind_tbl = qp_init_attr->rwq_ind_tbl;
1146 1147

	atomic_set(&qp->usecnt, 0);
1148 1149
	qp->mrs_used = 0;
	spin_lock_init(&qp->mr_lock);
1150
	INIT_LIST_HEAD(&qp->rdma_mrs);
1151
	INIT_LIST_HEAD(&qp->sig_mrs);
1152
	qp->port = 0;
1153

1154 1155 1156 1157 1158 1159 1160 1161 1162
	if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
		struct ib_qp *xrc_qp = create_xrc_qp(qp, qp_init_attr);

		if (IS_ERR(xrc_qp)) {
			ret = PTR_ERR(xrc_qp);
			goto err;
		}
		return xrc_qp;
	}
1163 1164 1165 1166 1167 1168 1169 1170

	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;
1171 1172
		if (qp_init_attr->recv_cq)
			atomic_inc(&qp_init_attr->recv_cq->usecnt);
1173 1174 1175
		qp->srq = qp_init_attr->srq;
		if (qp->srq)
			atomic_inc(&qp_init_attr->srq->usecnt);
L
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1176 1177
	}

1178 1179 1180 1181
	qp->send_cq = qp_init_attr->send_cq;
	qp->xrcd    = NULL;

	atomic_inc(&pd->usecnt);
1182 1183 1184 1185
	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);
1186 1187 1188

	if (qp_init_attr->cap.max_rdma_ctxs) {
		ret = rdma_rw_init_mrs(qp, qp_init_attr);
1189 1190
		if (ret)
			goto err;
1191 1192
	}

1193 1194 1195 1196 1197 1198 1199 1200 1201
	/*
	 * 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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Linus Torvalds 已提交
1202
	return qp;
1203 1204 1205 1206 1207

err:
	ib_destroy_qp(qp);
	return ERR_PTR(ret);

L
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1208 1209 1210
}
EXPORT_SYMBOL(ib_create_qp);

1211 1212
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];
1215 1216 1217 1218 1219 1220 1221 1222 1223
} 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),
O
Or Gerlitz 已提交
1224
				[IB_QPT_RAW_PACKET] = IB_QP_PORT,
1225 1226 1227 1228 1229 1230
				[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),
S
Sean Hefty 已提交
1231 1232 1233 1234 1235 1236
				[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),
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
				[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),
S
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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),
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
				[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),
S
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1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
				[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),
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
			},
			.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),
S
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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),
1310 1311 1312 1313
				 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX		|
						 IB_QP_QKEY),
				 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX		|
						 IB_QP_QKEY),
1314
			 },
1315
		},
1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329
	},
	[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),
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
				[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),
1361 1362 1363 1364
				 [IB_QPT_SMI] = (IB_QP_CUR_STATE		|
						 IB_QP_QKEY),
				 [IB_QPT_GSI] = (IB_QP_CUR_STATE		|
						 IB_QP_QKEY),
1365
				 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376
			 }
		}
	},
	[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),
1377 1378
				[IB_QPT_UC]  = (IB_QP_CUR_STATE			|
						IB_QP_ACCESS_FLAGS		|
1379 1380
						IB_QP_ALT_PATH			|
						IB_QP_PATH_MIG_STATE),
1381 1382
				[IB_QPT_RC]  = (IB_QP_CUR_STATE			|
						IB_QP_ACCESS_FLAGS		|
1383 1384 1385
						IB_QP_ALT_PATH			|
						IB_QP_PATH_MIG_STATE		|
						IB_QP_MIN_RNR_TIMER),
S
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1386 1387 1388 1389 1390 1391 1392 1393 1394
				[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),
1395 1396 1397 1398
				[IB_QPT_SMI] = (IB_QP_CUR_STATE			|
						IB_QP_QKEY),
				[IB_QPT_GSI] = (IB_QP_CUR_STATE			|
						IB_QP_QKEY),
1399
				[IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1400 1401 1402 1403 1404 1405 1406 1407
			}
		},
		[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,
S
Sean Hefty 已提交
1408 1409
				[IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
				[IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431
				[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),
S
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1432 1433 1434 1435 1436 1437 1438 1439 1440
				[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),
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468
				[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),
S
Sean Hefty 已提交
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
				[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),
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517
				[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 }
	}
};

1518 1519 1520
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)
1521 1522 1523 1524 1525 1526
{
	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)
1527
		return false;
1528 1529

	if (!qp_state_table[cur_state][next_state].valid)
1530
		return false;
1531 1532 1533 1534 1535

	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)
1536
		return false;
1537 1538

	if (mask & ~(req_param | opt_param | IB_QP_STATE))
1539
		return false;
1540

1541
	return true;
1542 1543 1544
}
EXPORT_SYMBOL(ib_modify_qp_is_ok);

P
Parav Pandit 已提交
1545 1546 1547 1548 1549 1550 1551 1552 1553
/**
 * 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.
 */
1554 1555
static int ib_resolve_eth_dmac(struct ib_device *device,
			       struct rdma_ah_attr *ah_attr)
1556
{
P
Parav Pandit 已提交
1557
	int ret = 0;
1558

1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
	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);
		}
1569
	} else {
1570
		ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1571 1572 1573 1574
	}
	return ret;
}

1575 1576 1577 1578 1579 1580 1581 1582
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);
}

1583
/**
1584
 * IB core internal function to perform QP attributes modification.
1585
 */
1586 1587
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
1588
{
1589
	u8 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1590 1591
	const struct ib_gid_attr *old_sgid_attr_av;
	const struct ib_gid_attr *old_sgid_attr_alt_av;
1592
	int ret;
1593

1594 1595 1596 1597 1598 1599 1600
	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) {
1601 1602 1603 1604 1605 1606 1607
		/*
		 * 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.
		 */
1608 1609 1610 1611
		ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
					  &old_sgid_attr_alt_av);
		if (ret)
			goto out_av;
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622

		/*
		 * 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;
		}
1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636
	}

	/*
	 * 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;
	}

1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
	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;
		}
	}

1651
	ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
1652 1653 1654 1655
	if (ret)
		goto out;

	if (attr_mask & IB_QP_PORT)
1656
		qp->port = attr->port_num;
1657 1658 1659 1660 1661 1662
	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);
1663

1664 1665 1666 1667 1668 1669
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);
1670
	return ret;
1671
}
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686

/**
 * 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)
{
1687
	return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
1688
}
1689
EXPORT_SYMBOL(ib_modify_qp_with_udata);
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 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745
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);

1746 1747 1748 1749
int ib_modify_qp(struct ib_qp *qp,
		 struct ib_qp_attr *qp_attr,
		 int qp_attr_mask)
{
1750
	return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
L
Linus Torvalds 已提交
1751 1752 1753 1754 1755 1756 1757 1758
}
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)
{
1759 1760 1761
	qp_attr->ah_attr.grh.sgid_attr = NULL;
	qp_attr->alt_ah_attr.grh.sgid_attr = NULL;

L
Linus Torvalds 已提交
1762
	return qp->device->query_qp ?
1763
		qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
1764
		-EOPNOTSUPP;
L
Linus Torvalds 已提交
1765 1766 1767
}
EXPORT_SYMBOL(ib_query_qp);

1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781
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);
1782 1783
	if (qp->qp_sec)
		ib_close_shared_qp_security(qp->qp_sec);
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817
	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
1818 1819
int ib_destroy_qp(struct ib_qp *qp)
{
1820 1821
	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
1822 1823 1824
	struct ib_pd *pd;
	struct ib_cq *scq, *rcq;
	struct ib_srq *srq;
1825
	struct ib_rwq_ind_table *ind_tbl;
1826
	struct ib_qp_security *sec;
L
Linus Torvalds 已提交
1827 1828
	int ret;

1829 1830
	WARN_ON_ONCE(qp->mrs_used > 0);

1831 1832 1833 1834 1835 1836
	if (atomic_read(&qp->usecnt))
		return -EBUSY;

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

S
Sean Hefty 已提交
1837 1838 1839 1840
	pd   = qp->pd;
	scq  = qp->send_cq;
	rcq  = qp->recv_cq;
	srq  = qp->srq;
1841
	ind_tbl = qp->rwq_ind_tbl;
1842 1843 1844
	sec  = qp->qp_sec;
	if (sec)
		ib_destroy_qp_security_begin(sec);
L
Linus Torvalds 已提交
1845

1846 1847 1848
	if (!qp->uobject)
		rdma_rw_cleanup_mrs(qp);

1849
	rdma_restrack_del(&qp->res);
L
Linus Torvalds 已提交
1850 1851
	ret = qp->device->destroy_qp(qp);
	if (!ret) {
1852 1853 1854 1855
		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
1856 1857 1858 1859 1860 1861
		if (pd)
			atomic_dec(&pd->usecnt);
		if (scq)
			atomic_dec(&scq->usecnt);
		if (rcq)
			atomic_dec(&rcq->usecnt);
L
Linus Torvalds 已提交
1862 1863
		if (srq)
			atomic_dec(&srq->usecnt);
1864 1865
		if (ind_tbl)
			atomic_dec(&ind_tbl->usecnt);
1866 1867 1868 1869 1870
		if (sec)
			ib_destroy_qp_security_end(sec);
	} else {
		if (sec)
			ib_destroy_qp_security_abort(sec);
L
Linus Torvalds 已提交
1871 1872 1873 1874 1875 1876 1877 1878
	}

	return ret;
}
EXPORT_SYMBOL(ib_destroy_qp);

/* Completion queues */

1879 1880 1881 1882 1883 1884
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)
L
Linus Torvalds 已提交
1885 1886 1887
{
	struct ib_cq *cq;

1888
	cq = device->create_cq(device, cq_attr, NULL, NULL);
L
Linus Torvalds 已提交
1889 1890 1891

	if (!IS_ERR(cq)) {
		cq->device        = device;
1892
		cq->uobject       = NULL;
L
Linus Torvalds 已提交
1893 1894 1895 1896
		cq->comp_handler  = comp_handler;
		cq->event_handler = event_handler;
		cq->cq_context    = cq_context;
		atomic_set(&cq->usecnt, 0);
1897
		cq->res.type = RDMA_RESTRACK_CQ;
1898
		cq->res.kern_name = caller;
1899
		rdma_restrack_add(&cq->res);
L
Linus Torvalds 已提交
1900 1901 1902 1903
	}

	return cq;
}
1904
EXPORT_SYMBOL(__ib_create_cq);
L
Linus Torvalds 已提交
1905

1906
int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
E
Eli Cohen 已提交
1907 1908
{
	return cq->device->modify_cq ?
1909
		cq->device->modify_cq(cq, cq_count, cq_period) : -EOPNOTSUPP;
E
Eli Cohen 已提交
1910
}
1911
EXPORT_SYMBOL(rdma_set_cq_moderation);
E
Eli Cohen 已提交
1912

L
Linus Torvalds 已提交
1913 1914 1915 1916 1917
int ib_destroy_cq(struct ib_cq *cq)
{
	if (atomic_read(&cq->usecnt))
		return -EBUSY;

1918
	rdma_restrack_del(&cq->res);
L
Linus Torvalds 已提交
1919 1920 1921 1922
	return cq->device->destroy_cq(cq);
}
EXPORT_SYMBOL(ib_destroy_cq);

R
Roland Dreier 已提交
1923
int ib_resize_cq(struct ib_cq *cq, int cqe)
L
Linus Torvalds 已提交
1924
{
1925
	return cq->device->resize_cq ?
1926
		cq->device->resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
L
Linus Torvalds 已提交
1927 1928 1929 1930 1931 1932 1933
}
EXPORT_SYMBOL(ib_resize_cq);

/* Memory regions */

int ib_dereg_mr(struct ib_mr *mr)
{
1934
	struct ib_pd *pd = mr->pd;
1935
	struct ib_dm *dm = mr->dm;
L
Linus Torvalds 已提交
1936 1937
	int ret;

1938
	rdma_restrack_del(&mr->res);
L
Linus Torvalds 已提交
1939
	ret = mr->device->dereg_mr(mr);
1940
	if (!ret) {
L
Linus Torvalds 已提交
1941
		atomic_dec(&pd->usecnt);
1942 1943 1944
		if (dm)
			atomic_dec(&dm->usecnt);
	}
L
Linus Torvalds 已提交
1945 1946 1947 1948 1949

	return ret;
}
EXPORT_SYMBOL(ib_dereg_mr);

S
Sagi Grimberg 已提交
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
/**
 * 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)
1965 1966 1967
{
	struct ib_mr *mr;

1968
	if (!pd->device->alloc_mr)
1969
		return ERR_PTR(-EOPNOTSUPP);
1970

1971
	mr = pd->device->alloc_mr(pd, mr_type, max_num_sg);
1972 1973 1974
	if (!IS_ERR(mr)) {
		mr->device  = pd->device;
		mr->pd      = pd;
1975
		mr->dm      = NULL;
1976 1977
		mr->uobject = NULL;
		atomic_inc(&pd->usecnt);
1978
		mr->need_inval = false;
1979 1980
		mr->res.type = RDMA_RESTRACK_MR;
		rdma_restrack_add(&mr->res);
1981 1982 1983 1984
	}

	return mr;
}
1985
EXPORT_SYMBOL(ib_alloc_mr);
1986

L
Linus Torvalds 已提交
1987 1988 1989 1990 1991 1992 1993 1994 1995
/* "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)
1996
		return ERR_PTR(-EOPNOTSUPP);
L
Linus Torvalds 已提交
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036

	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 */

2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048
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
2049
			if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
2050 2051 2052 2053 2054 2055 2056 2057
			    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
2058
		if (rdma_port_get_link_layer(qp->device, port) !=
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
		    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
2075 2076
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
2077 2078
	int ret;

2079
	if (!qp->device->attach_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->attach_mcast(qp, gid, lid);
	if (!ret)
		atomic_inc(&qp->usecnt);
	return ret;
L
Linus Torvalds 已提交
2090 2091 2092 2093 2094
}
EXPORT_SYMBOL(ib_attach_mcast);

int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
2095 2096
	int ret;

2097
	if (!qp->device->detach_mcast)
2098
		return -EOPNOTSUPP;
2099 2100 2101

	if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
	    qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2102 2103
		return -EINVAL;

2104 2105 2106 2107
	ret = qp->device->detach_mcast(qp, gid, lid);
	if (!ret)
		atomic_dec(&qp->usecnt);
	return ret;
L
Linus Torvalds 已提交
2108 2109
}
EXPORT_SYMBOL(ib_detach_mcast);
S
Sean Hefty 已提交
2110

2111
struct ib_xrcd *__ib_alloc_xrcd(struct ib_device *device, const char *caller)
S
Sean Hefty 已提交
2112 2113 2114 2115
{
	struct ib_xrcd *xrcd;

	if (!device->alloc_xrcd)
2116
		return ERR_PTR(-EOPNOTSUPP);
S
Sean Hefty 已提交
2117 2118 2119 2120

	xrcd = device->alloc_xrcd(device, NULL, NULL);
	if (!IS_ERR(xrcd)) {
		xrcd->device = device;
2121
		xrcd->inode = NULL;
S
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2122
		atomic_set(&xrcd->usecnt, 0);
2123 2124
		mutex_init(&xrcd->tgt_qp_mutex);
		INIT_LIST_HEAD(&xrcd->tgt_qp_list);
S
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2125 2126 2127 2128
	}

	return xrcd;
}
2129
EXPORT_SYMBOL(__ib_alloc_xrcd);
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2130 2131 2132

int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
{
2133 2134 2135
	struct ib_qp *qp;
	int ret;

S
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2136 2137 2138
	if (atomic_read(&xrcd->usecnt))
		return -EBUSY;

2139 2140 2141 2142 2143 2144 2145
	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
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2146 2147 2148
	return xrcd->device->dealloc_xrcd(xrcd);
}
EXPORT_SYMBOL(ib_dealloc_xrcd);
2149

2150 2151 2152 2153
/**
 * ib_create_wq - Creates a WQ associated with the specified protection
 * domain.
 * @pd: The protection domain associated with the WQ.
2154
 * @wq_attr: A list of initial attributes required to create the
2155 2156 2157
 * WQ. If WQ creation succeeds, then the attributes are updated to
 * the actual capabilities of the created WQ.
 *
2158
 * wq_attr->max_wr and wq_attr->max_sge determine
2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
 * 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)
2170
		return ERR_PTR(-EOPNOTSUPP);
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 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224

	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)
2225
		return -EOPNOTSUPP;
2226 2227 2228 2229 2230 2231

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

2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
/*
 * 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)
2250
		return ERR_PTR(-EOPNOTSUPP);
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 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293

	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);

2294 2295 2296 2297
int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
		       struct ib_mr_status *mr_status)
{
	return mr->device->check_mr_status ?
2298
		mr->device->check_mr_status(mr, check_mask, mr_status) : -EOPNOTSUPP;
2299 2300
}
EXPORT_SYMBOL(ib_check_mr_status);
2301

2302 2303 2304 2305
int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
			 int state)
{
	if (!device->set_vf_link_state)
2306
		return -EOPNOTSUPP;
2307 2308 2309 2310 2311 2312 2313 2314 2315

	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)
2316
		return -EOPNOTSUPP;
2317 2318 2319 2320 2321 2322 2323 2324 2325

	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)
2326
		return -EOPNOTSUPP;
2327 2328 2329 2330 2331 2332 2333 2334 2335

	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)
2336
		return -EOPNOTSUPP;
2337 2338 2339 2340 2341

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

2342 2343 2344 2345 2346 2347
/**
 * 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
2348
 * @sg_offset:     offset in bytes into sg
2349 2350 2351 2352
 * @page_size:     page vector desired page size
 *
 * Constraints:
 * - The first sg element is allowed to have an offset.
2353 2354 2355
 * - 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.
2356 2357 2358
 * - 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.
2359
 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2360
 *   constraints holds and the page_size argument is ignored.
2361 2362 2363 2364 2365 2366
 *
 * Returns the number of sg elements that were mapped to the memory region.
 *
 * After this completes successfully, the  memory region
 * is ready for registration.
 */
2367
int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2368
		 unsigned int *sg_offset, unsigned int page_size)
2369 2370
{
	if (unlikely(!mr->device->map_mr_sg))
2371
		return -EOPNOTSUPP;
2372 2373 2374

	mr->page_size = page_size;

2375
	return mr->device->map_mr_sg(mr, sg, sg_nents, sg_offset);
2376 2377 2378 2379 2380 2381 2382 2383 2384
}
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
2385 2386 2387 2388
 * @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.
2389 2390
 * @set_page:      driver page assignment function pointer
 *
B
Bart Van Assche 已提交
2391
 * Core service helper for drivers to convert the largest
2392 2393 2394 2395 2396 2397 2398
 * 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.
 */
2399
int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2400
		unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2401 2402
{
	struct scatterlist *sg;
2403
	u64 last_end_dma_addr = 0;
2404
	unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2405 2406
	unsigned int last_page_off = 0;
	u64 page_mask = ~((u64)mr->page_size - 1);
B
Bart Van Assche 已提交
2407
	int i, ret;
2408

2409 2410 2411
	if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
		return -EINVAL;

2412
	mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2413 2414 2415
	mr->length = 0;

	for_each_sg(sgl, sg, sg_nents, i) {
2416
		u64 dma_addr = sg_dma_address(sg) + sg_offset;
2417
		u64 prev_addr = dma_addr;
2418
		unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2419 2420 2421
		u64 end_dma_addr = dma_addr + dma_len;
		u64 page_addr = dma_addr & page_mask;

B
Bart Van Assche 已提交
2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
		/*
		 * 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;
2438 2439 2440
		}

		do {
B
Bart Van Assche 已提交
2441
			ret = set_page(mr, page_addr);
2442 2443 2444 2445 2446 2447 2448 2449
			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
2450
next_page:
2451 2452 2453 2454 2455 2456
			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;
2457 2458

		sg_offset = 0;
2459 2460
	}

2461 2462
	if (sg_offset_p)
		*sg_offset_p = 0;
2463 2464 2465
	return i;
}
EXPORT_SYMBOL(ib_sg_to_pages);
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484

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)
{
2485
	struct ib_cq *cq = qp->send_cq;
2486 2487
	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
	struct ib_drain_cqe sdrain;
2488 2489
	struct ib_rdma_wr swr = {
		.wr = {
2490 2491
			.next = NULL,
			{ .wr_cqe	= &sdrain.cqe, },
2492 2493 2494
			.opcode	= IB_WR_RDMA_WRITE,
		},
	};
2495 2496 2497 2498 2499 2500 2501 2502
	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;
	}

2503 2504 2505
	sdrain.cqe.done = ib_drain_qp_done;
	init_completion(&sdrain.done);

2506
	ret = ib_post_send(qp, &swr.wr, NULL);
2507 2508 2509 2510 2511
	if (ret) {
		WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
		return;
	}

2512 2513 2514 2515 2516
	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);
2517 2518 2519 2520 2521 2522 2523
}

/*
 * Post a WR and block until its completion is reaped for the RQ.
 */
static void __ib_drain_rq(struct ib_qp *qp)
{
2524
	struct ib_cq *cq = qp->recv_cq;
2525 2526
	struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
	struct ib_drain_cqe rdrain;
2527
	struct ib_recv_wr rwr = {};
2528 2529 2530 2531 2532 2533 2534 2535
	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;
	}

2536 2537 2538 2539
	rwr.wr_cqe = &rdrain.cqe;
	rdrain.cqe.done = ib_drain_qp_done;
	init_completion(&rdrain.done);

2540
	ret = ib_post_recv(qp, &rwr, NULL);
2541 2542 2543 2544 2545
	if (ret) {
		WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
		return;
	}

2546 2547 2548 2549 2550
	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);
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566
}

/**
 * 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.
 *
2567
 * allocate the CQ using ib_alloc_cq().
2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
 *
 * 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.
 *
2595
 * allocate the CQ using ib_alloc_cq().
2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618
 *
 * 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.
 *
2619
 * allocate the CQs using ib_alloc_cq().
2620 2621 2622 2623 2624 2625 2626
 *
 * 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);
2627 2628
	if (!qp->srq)
		ib_drain_rq(qp);
2629 2630
}
EXPORT_SYMBOL(ib_drain_qp);