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[PATCH] IB: Add RMPP implementation

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Add RMPP implementation.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hal Rosenstock 2005-07-27 11:45:37 -07:00 committed by Linus Torvalds
parent d2082ee516
commit fa619a7704
5 changed files with 966 additions and 50 deletions
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2
drivers/infiniband/core/Makefile
View file

@ -6,7 +6,7 @@ obj-$(CONFIG_INFINIBAND_USER_VERBS) += ib_uverbs.o
ib_core-y := packer.o ud_header.o verbs.o sysfs.o \
device.o fmr_pool.o cache.o
ib_mad-y := mad.o smi.o agent.o
ib_mad-y := mad.o smi.o agent.o mad_rmpp.o
ib_sa-y := sa_query.o

163
drivers/infiniband/core/mad.c
View file

@ -1,5 +1,7 @@
/*
* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
*
* 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
@ -29,12 +31,12 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mad.c 1389 2004-12-27 22:56:47Z roland $
* $Id: mad.c 2817 2005-07-07 11:29:26Z halr $
*/
#include <linux/dma-mapping.h>
#include "mad_priv.h"
#include "mad_rmpp.h"
#include "smi.h"
#include "agent.h"
@ -45,6 +47,7 @@ MODULE_AUTHOR("Sean Hefty");
kmem_cache_t *ib_mad_cache;
static struct list_head ib_mad_port_list;
static u32 ib_mad_client_id = 0;
@ -62,8 +65,6 @@ static struct ib_mad_agent_private *find_mad_agent(
static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
struct ib_mad_private *mad);
static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc);
static void timeout_sends(void *data);
static void local_completions(void *data);
static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
@ -195,8 +196,8 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
if (qpn == -1)
goto error1;
if (rmpp_version)
goto error1; /* XXX: until RMPP implemented */
if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
goto error1;
/* Validate MAD registration request if supplied */
if (mad_reg_req) {
@ -281,7 +282,7 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
/* Now, fill in the various structures */
mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
mad_agent_priv->reg_req = reg_req;
mad_agent_priv->rmpp_version = rmpp_version;
mad_agent_priv->agent.rmpp_version = rmpp_version;
mad_agent_priv->agent.device = device;
mad_agent_priv->agent.recv_handler = recv_handler;
mad_agent_priv->agent.send_handler = send_handler;
@ -341,6 +342,7 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
INIT_LIST_HEAD(&mad_agent_priv->send_list);
INIT_LIST_HEAD(&mad_agent_priv->wait_list);
INIT_LIST_HEAD(&mad_agent_priv->done_list);
INIT_LIST_HEAD(&mad_agent_priv->rmpp_list);
INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv);
INIT_LIST_HEAD(&mad_agent_priv->local_list);
INIT_WORK(&mad_agent_priv->local_work, local_completions,
@ -502,6 +504,7 @@ static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
spin_unlock_irqrestore(&port_priv->reg_lock, flags);
flush_workqueue(port_priv->wq);
ib_cancel_rmpp_recvs(mad_agent_priv);
atomic_dec(&mad_agent_priv->refcount);
wait_event(mad_agent_priv->wait,
@ -786,12 +789,15 @@ struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
int buf_size;
void *buf;
if (rmpp_active)
return ERR_PTR(-EINVAL); /* until RMPP implemented */
mad_agent_priv = container_of(mad_agent,
struct ib_mad_agent_private, agent);
buf_size = get_buf_length(hdr_len, data_len);
if ((!mad_agent->rmpp_version &&
(rmpp_active || buf_size > sizeof(struct ib_mad))) ||
(!rmpp_active && buf_size > sizeof(struct ib_mad)))
return ERR_PTR(-EINVAL);
buf = kmalloc(sizeof *send_buf + buf_size, gfp_mask);
if (!buf)
return ERR_PTR(-ENOMEM);
@ -816,6 +822,18 @@ struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
send_buf->send_wr.wr.ud.remote_qpn = remote_qpn;
send_buf->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY;
send_buf->send_wr.wr.ud.pkey_index = pkey_index;
if (rmpp_active) {
struct ib_rmpp_mad *rmpp_mad;
rmpp_mad = (struct ib_rmpp_mad *)send_buf->mad;
rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(hdr_len -
offsetof(struct ib_rmpp_mad, data) + data_len);
rmpp_mad->rmpp_hdr.rmpp_version = mad_agent->rmpp_version;
rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA;
ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr,
IB_MGMT_RMPP_FLAG_ACTIVE);
}
send_buf->mad_agent = mad_agent;
atomic_inc(&mad_agent_priv->refcount);
return send_buf;
@ -839,7 +857,7 @@ void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
}
EXPORT_SYMBOL(ib_free_send_mad);
static int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
{
struct ib_mad_qp_info *qp_info;
struct ib_send_wr *bad_send_wr;
@ -940,13 +958,13 @@ int ib_post_send_mad(struct ib_mad_agent *mad_agent,
ret = -ENOMEM;
goto error2;
}
memset(mad_send_wr, 0, sizeof *mad_send_wr);
mad_send_wr->send_wr = *send_wr;
mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list;
memcpy(mad_send_wr->sg_list, send_wr->sg_list,
sizeof *send_wr->sg_list * send_wr->num_sge);
mad_send_wr->wr_id = mad_send_wr->send_wr.wr_id;
mad_send_wr->send_wr.next = NULL;
mad_send_wr->wr_id = send_wr->wr_id;
mad_send_wr->tid = send_wr->wr.ud.mad_hdr->tid;
mad_send_wr->mad_agent_priv = mad_agent_priv;
/* Timeout will be updated after send completes */
@ -964,8 +982,13 @@ int ib_post_send_mad(struct ib_mad_agent *mad_agent,
&mad_agent_priv->send_list);
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
ret = ib_send_mad(mad_send_wr);
if (ret) {
if (mad_agent_priv->agent.rmpp_version) {
ret = ib_send_rmpp_mad(mad_send_wr);
if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
ret = ib_send_mad(mad_send_wr);
} else
ret = ib_send_mad(mad_send_wr);
if (ret < 0) {
/* Fail send request */
spin_lock_irqsave(&mad_agent_priv->lock, flags);
list_del(&mad_send_wr->agent_list);
@ -991,31 +1014,25 @@ EXPORT_SYMBOL(ib_post_send_mad);
*/
void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
{
struct ib_mad_recv_buf *entry;
struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
struct ib_mad_private_header *mad_priv_hdr;
struct ib_mad_private *priv;
struct list_head free_list;
mad_priv_hdr = container_of(mad_recv_wc,
struct ib_mad_private_header,
recv_wc);
priv = container_of(mad_priv_hdr, struct ib_mad_private, header);
INIT_LIST_HEAD(&free_list);
list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
/*
* Walk receive buffer list associated with this WC
* No need to remove them from list of receive buffers
*/
list_for_each_entry(entry, &mad_recv_wc->recv_buf.list, list) {
/* Free previous receive buffer */
kmem_cache_free(ib_mad_cache, priv);
list_for_each_entry_safe(mad_recv_buf, temp_recv_buf,
&free_list, list) {
mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc,
recv_buf);
mad_priv_hdr = container_of(mad_recv_wc,
struct ib_mad_private_header,
recv_wc);
priv = container_of(mad_priv_hdr, struct ib_mad_private,
header);
kmem_cache_free(ib_mad_cache, priv);
}
/* Free last buffer */
kmem_cache_free(ib_mad_cache, priv);
}
EXPORT_SYMBOL(ib_free_recv_mad);
@ -1524,9 +1541,20 @@ static int validate_mad(struct ib_mad *mad, u32 qp_num)
return valid;
}
static struct ib_mad_send_wr_private*
find_send_req(struct ib_mad_agent_private *mad_agent_priv,
u64 tid)
static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv,
struct ib_mad_hdr *mad_hdr)
{
struct ib_rmpp_mad *rmpp_mad;
rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
return !mad_agent_priv->agent.rmpp_version ||
!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE) ||
(rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
}
struct ib_mad_send_wr_private*
ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, u64 tid)
{
struct ib_mad_send_wr_private *mad_send_wr;
@ -1542,7 +1570,9 @@ find_send_req(struct ib_mad_agent_private *mad_agent_priv,
*/
list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
agent_list) {
if (mad_send_wr->tid == tid && mad_send_wr->timeout) {
if (is_data_mad(mad_agent_priv,
mad_send_wr->send_wr.wr.ud.mad_hdr) &&
mad_send_wr->tid == tid && mad_send_wr->timeout) {
/* Verify request has not been canceled */
return (mad_send_wr->status == IB_WC_SUCCESS) ?
mad_send_wr : NULL;
@ -1551,7 +1581,7 @@ find_send_req(struct ib_mad_agent_private *mad_agent_priv,
return NULL;
}
static void ib_mark_req_done(struct ib_mad_send_wr_private *mad_send_wr)
void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
{
mad_send_wr->timeout = 0;
if (mad_send_wr->refcount == 1) {
@ -1569,12 +1599,23 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
unsigned long flags;
u64 tid;
INIT_LIST_HEAD(&mad_recv_wc->recv_buf.list);
INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
if (mad_agent_priv->agent.rmpp_version) {
mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
mad_recv_wc);
if (!mad_recv_wc) {
if (atomic_dec_and_test(&mad_agent_priv->refcount))
wake_up(&mad_agent_priv->wait);
return;
}
}
/* Complete corresponding request */
if (response_mad(mad_recv_wc->recv_buf.mad)) {
tid = mad_recv_wc->recv_buf.mad->mad_hdr.tid;
spin_lock_irqsave(&mad_agent_priv->lock, flags);
mad_send_wr = find_send_req(mad_agent_priv, tid);
mad_send_wr = ib_find_send_mad(mad_agent_priv, tid);
if (!mad_send_wr) {
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
ib_free_recv_mad(mad_recv_wc);
@ -1582,7 +1623,7 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
wake_up(&mad_agent_priv->wait);
return;
}
ib_mark_req_done(mad_send_wr);
ib_mark_mad_done(mad_send_wr);
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
/* Defined behavior is to complete response before request */
@ -1787,14 +1828,22 @@ void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
/*
* Process a send work completion
*/
static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc)
void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc)
{
struct ib_mad_agent_private *mad_agent_priv;
unsigned long flags;
int ret;
mad_agent_priv = mad_send_wr->mad_agent_priv;
spin_lock_irqsave(&mad_agent_priv->lock, flags);
if (mad_agent_priv->agent.rmpp_version) {
ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
if (ret == IB_RMPP_RESULT_CONSUMED)
goto done;
} else
ret = IB_RMPP_RESULT_UNHANDLED;
if (mad_send_wc->status != IB_WC_SUCCESS &&
mad_send_wr->status == IB_WC_SUCCESS) {
mad_send_wr->status = mad_send_wc->status;
@ -1806,8 +1855,7 @@ static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
mad_send_wr->status == IB_WC_SUCCESS) {
wait_for_response(mad_send_wr);
}
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
return;
goto done;
}
/* Remove send from MAD agent and notify client of completion */
@ -1817,14 +1865,18 @@ static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
if (mad_send_wr->status != IB_WC_SUCCESS )
mad_send_wc->status = mad_send_wr->status;
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
mad_send_wc);
if (ret != IB_RMPP_RESULT_INTERNAL)
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
mad_send_wc);
/* Release reference on agent taken when sending */
if (atomic_dec_and_test(&mad_agent_priv->refcount))
wake_up(&mad_agent_priv->wait);
kfree(mad_send_wr);
return;
done:
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
}
static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv,
@ -2036,7 +2088,9 @@ find_send_by_wr_id(struct ib_mad_agent_private *mad_agent_priv, u64 wr_id)
list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
agent_list) {
if (mad_send_wr->wr_id == wr_id)
if (is_data_mad(mad_agent_priv,
mad_send_wr->send_wr.wr.ud.mad_hdr) &&
mad_send_wr->wr_id == wr_id)
return mad_send_wr;
}
return NULL;
@ -2118,7 +2172,9 @@ static void local_completions(void *data)
local->mad_priv->header.recv_wc.wc = &wc;
local->mad_priv->header.recv_wc.mad_len =
sizeof(struct ib_mad);
INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.recv_buf.list);
INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list);
list_add(&local->mad_priv->header.recv_wc.recv_buf.list,
&local->mad_priv->header.recv_wc.rmpp_list);
local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
local->mad_priv->header.recv_wc.recv_buf.mad =
&local->mad_priv->mad.mad;
@ -2166,7 +2222,21 @@ static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_wr.
wr.ud.timeout_ms);
ret = ib_send_mad(mad_send_wr);
if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {
ret = ib_retry_rmpp(mad_send_wr);
switch (ret) {
case IB_RMPP_RESULT_UNHANDLED:
ret = ib_send_mad(mad_send_wr);
break;
case IB_RMPP_RESULT_CONSUMED:
ret = 0;
break;
default:
ret = -ECOMM;
break;
}
} else
ret = ib_send_mad(mad_send_wr);
if (!ret) {
mad_send_wr->refcount++;
@ -2724,3 +2794,4 @@ static void __exit ib_mad_cleanup_module(void)
module_init(ib_mad_init_module);
module_exit(ib_mad_cleanup_module);

28
drivers/infiniband/core/mad_priv.h
View file

@ -1,5 +1,7 @@
/*
* Copyright (c) 2004, 2005, Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* 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
@ -29,7 +31,7 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mad_priv.h 1980 2005-03-11 22:33:53Z sean.hefty $
* $Id: mad_priv.h 2730 2005-06-28 16:43:03Z sean.hefty $
*/
#ifndef __IB_MAD_PRIV_H__
@ -97,10 +99,10 @@ struct ib_mad_agent_private {
unsigned long timeout;
struct list_head local_list;
struct work_struct local_work;
struct list_head rmpp_list;
atomic_t refcount;
wait_queue_head_t wait;
u8 rmpp_version;
};
struct ib_mad_snoop_private {
@ -125,6 +127,14 @@ struct ib_mad_send_wr_private {
int retry;
int refcount;
enum ib_wc_status status;
/* RMPP control */
int last_ack;
int seg_num;
int newwin;
int total_seg;
int data_offset;
int pad;
};
struct ib_mad_local_private {
@ -135,7 +145,6 @@ struct ib_mad_local_private {
struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG];
u64 wr_id; /* client WR ID */
u64 tid;
int retries;
};
struct ib_mad_mgmt_method_table {
@ -198,4 +207,17 @@ struct ib_mad_port_private {
extern kmem_cache_t *ib_mad_cache;
int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr);
struct ib_mad_send_wr_private *
ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, u64 tid);
void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc);
void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr);
void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
int timeout_ms);
#endif /* __IB_MAD_PRIV_H__ */

765
drivers/infiniband/core/mad_rmpp.c Normal file
View file

@ -0,0 +1,765 @@
/*
* Copyright (c) 2005 Intel Inc. All rights reserved.
* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
*
* 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.
*
* $Id: mad_rmpp.c 1921 2005-03-02 22:58:44Z sean.hefty $
*/
#include <linux/dma-mapping.h>
#include "mad_priv.h"
#include "mad_rmpp.h"
enum rmpp_state {
RMPP_STATE_ACTIVE,
RMPP_STATE_TIMEOUT,
RMPP_STATE_COMPLETE
};
struct mad_rmpp_recv {
struct ib_mad_agent_private *agent;
struct list_head list;
struct work_struct timeout_work;
struct work_struct cleanup_work;
wait_queue_head_t wait;
enum rmpp_state state;
spinlock_t lock;
atomic_t refcount;
struct ib_ah *ah;
struct ib_mad_recv_wc *rmpp_wc;
struct ib_mad_recv_buf *cur_seg_buf;
int last_ack;
int seg_num;
int newwin;
u64 tid;
u32 src_qp;
u16 slid;
u8 mgmt_class;
u8 class_version;
u8 method;
};
static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv)
{
atomic_dec(&rmpp_recv->refcount);
wait_event(rmpp_recv->wait, !atomic_read(&rmpp_recv->refcount));
ib_destroy_ah(rmpp_recv->ah);
kfree(rmpp_recv);
}
void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent)
{
struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv;
unsigned long flags;
spin_lock_irqsave(&agent->lock, flags);
list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) {
cancel_delayed_work(&rmpp_recv->timeout_work);
cancel_delayed_work(&rmpp_recv->cleanup_work);
}
spin_unlock_irqrestore(&agent->lock, flags);
flush_workqueue(agent->qp_info->port_priv->wq);
list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv,
&agent->rmpp_list, list) {
list_del(&rmpp_recv->list);
if (rmpp_recv->state != RMPP_STATE_COMPLETE)
ib_free_recv_mad(rmpp_recv->rmpp_wc);
destroy_rmpp_recv(rmpp_recv);
}
}
static void recv_timeout_handler(void *data)
{
struct mad_rmpp_recv *rmpp_recv = data;
struct ib_mad_recv_wc *rmpp_wc;
unsigned long flags;
spin_lock_irqsave(&rmpp_recv->agent->lock, flags);
if (rmpp_recv->state != RMPP_STATE_ACTIVE) {
spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
return;
}
rmpp_recv->state = RMPP_STATE_TIMEOUT;
list_del(&rmpp_recv->list);
spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
/* TODO: send abort. */
rmpp_wc = rmpp_recv->rmpp_wc;
destroy_rmpp_recv(rmpp_recv);
ib_free_recv_mad(rmpp_wc);
}
static void recv_cleanup_handler(void *data)
{
struct mad_rmpp_recv *rmpp_recv = data;
unsigned long flags;
spin_lock_irqsave(&rmpp_recv->agent->lock, flags);
list_del(&rmpp_recv->list);
spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags);
destroy_rmpp_recv(rmpp_recv);
}
static struct mad_rmpp_recv *
create_rmpp_recv(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct mad_rmpp_recv *rmpp_recv;
struct ib_mad_hdr *mad_hdr;
rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL);
if (!rmpp_recv)
return NULL;
rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd,
mad_recv_wc->wc,
mad_recv_wc->recv_buf.grh,
agent->agent.port_num);
if (IS_ERR(rmpp_recv->ah))
goto error;
rmpp_recv->agent = agent;
init_waitqueue_head(&rmpp_recv->wait);
INIT_WORK(&rmpp_recv->timeout_work, recv_timeout_handler, rmpp_recv);
INIT_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler, rmpp_recv);
spin_lock_init(&rmpp_recv->lock);
rmpp_recv->state = RMPP_STATE_ACTIVE;
atomic_set(&rmpp_recv->refcount, 1);
rmpp_recv->rmpp_wc = mad_recv_wc;
rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf;
rmpp_recv->newwin = 1;
rmpp_recv->seg_num = 1;
rmpp_recv->last_ack = 0;
mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr;
rmpp_recv->tid = mad_hdr->tid;
rmpp_recv->src_qp = mad_recv_wc->wc->src_qp;
rmpp_recv->slid = mad_recv_wc->wc->slid;
rmpp_recv->mgmt_class = mad_hdr->mgmt_class;
rmpp_recv->class_version = mad_hdr->class_version;
rmpp_recv->method = mad_hdr->method;
return rmpp_recv;
error: kfree(rmpp_recv);
return NULL;
}
static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv)
{
if (atomic_dec_and_test(&rmpp_recv->refcount))
wake_up(&rmpp_recv->wait);
}
static struct mad_rmpp_recv *
find_rmpp_recv(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct mad_rmpp_recv *rmpp_recv;
struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr;
list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) {
if (rmpp_recv->tid == mad_hdr->tid &&
rmpp_recv->src_qp == mad_recv_wc->wc->src_qp &&
rmpp_recv->slid == mad_recv_wc->wc->slid &&
rmpp_recv->mgmt_class == mad_hdr->mgmt_class &&
rmpp_recv->class_version == mad_hdr->class_version &&
rmpp_recv->method == mad_hdr->method)
return rmpp_recv;
}
return NULL;
}
static struct mad_rmpp_recv *
acquire_rmpp_recv(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct mad_rmpp_recv *rmpp_recv;
unsigned long flags;
spin_lock_irqsave(&agent->lock, flags);
rmpp_recv = find_rmpp_recv(agent, mad_recv_wc);
if (rmpp_recv)
atomic_inc(&rmpp_recv->refcount);
spin_unlock_irqrestore(&agent->lock, flags);
return rmpp_recv;
}
static struct mad_rmpp_recv *
insert_rmpp_recv(struct ib_mad_agent_private *agent,
struct mad_rmpp_recv *rmpp_recv)
{
struct mad_rmpp_recv *cur_rmpp_recv;
cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc);
if (!cur_rmpp_recv)
list_add_tail(&rmpp_recv->list, &agent->rmpp_list);
return cur_rmpp_recv;
}
static int data_offset(u8 mgmt_class)
{
if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
return offsetof(struct ib_sa_mad, data);
else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
(mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
return offsetof(struct ib_vendor_mad, data);
else
return offsetof(struct ib_rmpp_mad, data);
}
static void format_ack(struct ib_rmpp_mad *ack,
struct ib_rmpp_mad *data,
struct mad_rmpp_recv *rmpp_recv)
{
unsigned long flags;
memcpy(&ack->mad_hdr, &data->mad_hdr,
data_offset(data->mad_hdr.mgmt_class));
ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP;
ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK;
ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
spin_lock_irqsave(&rmpp_recv->lock, flags);
rmpp_recv->last_ack = rmpp_recv->seg_num;
ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num);
ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin);
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
}
static void ack_recv(struct mad_rmpp_recv *rmpp_recv,
struct ib_mad_recv_wc *recv_wc)
{
struct ib_mad_send_buf *msg;
struct ib_send_wr *bad_send_wr;
int hdr_len, ret;
hdr_len = sizeof(struct ib_mad_hdr) + sizeof(struct ib_rmpp_hdr);
msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp,
recv_wc->wc->pkey_index, rmpp_recv->ah, 1,
hdr_len, sizeof(struct ib_rmpp_mad) - hdr_len,
GFP_KERNEL);
if (!msg)
return;
format_ack((struct ib_rmpp_mad *) msg->mad,
(struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv);
ret = ib_post_send_mad(&rmpp_recv->agent->agent, &msg->send_wr,
&bad_send_wr);
if (ret)
ib_free_send_mad(msg);
}
static inline int get_last_flag(struct ib_mad_recv_buf *seg)
{
struct ib_rmpp_mad *rmpp_mad;
rmpp_mad = (struct ib_rmpp_mad *) seg->mad;
return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST;
}
static inline int get_seg_num(struct ib_mad_recv_buf *seg)
{
struct ib_rmpp_mad *rmpp_mad;
rmpp_mad = (struct ib_rmpp_mad *) seg->mad;
return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num);
}
static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list,
struct ib_mad_recv_buf *seg)
{
if (seg->list.next == rmpp_list)
return NULL;
return container_of(seg->list.next, struct ib_mad_recv_buf, list);
}
static inline int window_size(struct ib_mad_agent_private *agent)
{
return max(agent->qp_info->recv_queue.max_active >> 3, 1);
}
static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list,
int seg_num)
{
struct ib_mad_recv_buf *seg_buf;
int cur_seg_num;
list_for_each_entry_reverse(seg_buf, rmpp_list, list) {
cur_seg_num = get_seg_num(seg_buf);
if (seg_num > cur_seg_num)
return seg_buf;
if (seg_num == cur_seg_num)
break;
}
return NULL;
}
static void update_seg_num(struct mad_rmpp_recv *rmpp_recv,
struct ib_mad_recv_buf *new_buf)
{
struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list;
while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) {
rmpp_recv->cur_seg_buf = new_buf;
rmpp_recv->seg_num++;
new_buf = get_next_seg(rmpp_list, new_buf);
}
}
static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv)
{
struct ib_rmpp_mad *rmpp_mad;
int hdr_size, data_size, pad;
rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad;
hdr_size = data_offset(rmpp_mad->mad_hdr.mgmt_class);
data_size = sizeof(struct ib_rmpp_mad) - hdr_size;
pad = data_size - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
if (pad > data_size || pad < 0)
pad = 0;
return hdr_size + rmpp_recv->seg_num * data_size - pad;
}
static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv)
{
struct ib_mad_recv_wc *rmpp_wc;
ack_recv(rmpp_recv, rmpp_recv->rmpp_wc);
if (rmpp_recv->seg_num > 1)
cancel_delayed_work(&rmpp_recv->timeout_work);
rmpp_wc = rmpp_recv->rmpp_wc;
rmpp_wc->mad_len = get_mad_len(rmpp_recv);
/* 10 seconds until we can find the packet lifetime */
queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq,
&rmpp_recv->cleanup_work, msecs_to_jiffies(10000));
return rmpp_wc;
}
void ib_coalesce_recv_mad(struct ib_mad_recv_wc *mad_recv_wc, void *buf)
{
struct ib_mad_recv_buf *seg_buf;
struct ib_rmpp_mad *rmpp_mad;
void *data;
int size, len, offset;
u8 flags;
len = mad_recv_wc->mad_len;
if (len <= sizeof(struct ib_mad)) {
memcpy(buf, mad_recv_wc->recv_buf.mad, len);
return;
}
offset = data_offset(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class);
list_for_each_entry(seg_buf, &mad_recv_wc->rmpp_list, list) {
rmpp_mad = (struct ib_rmpp_mad *)seg_buf->mad;
flags = ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr);
if (flags & IB_MGMT_RMPP_FLAG_FIRST) {
data = rmpp_mad;
size = sizeof(*rmpp_mad);
} else {
data = (void *) rmpp_mad + offset;
if (flags & IB_MGMT_RMPP_FLAG_LAST)
size = len;
else
size = sizeof(*rmpp_mad) - offset;
}
memcpy(buf, data, size);
len -= size;
buf += size;
}
}
EXPORT_SYMBOL(ib_coalesce_recv_mad);
static struct ib_mad_recv_wc *
continue_rmpp(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct mad_rmpp_recv *rmpp_recv;
struct ib_mad_recv_buf *prev_buf;
struct ib_mad_recv_wc *done_wc;
int seg_num;
unsigned long flags;
rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc);
if (!rmpp_recv)
goto drop1;
seg_num = get_seg_num(&mad_recv_wc->recv_buf);
spin_lock_irqsave(&rmpp_recv->lock, flags);
if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) ||
(seg_num > rmpp_recv->newwin))
goto drop3;
if ((seg_num <= rmpp_recv->last_ack) ||
(rmpp_recv->state == RMPP_STATE_COMPLETE)) {
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
ack_recv(rmpp_recv, mad_recv_wc);
goto drop2;
}
prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num);
if (!prev_buf)
goto drop3;
done_wc = NULL;
list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list);
if (rmpp_recv->cur_seg_buf == prev_buf) {
update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf);
if (get_last_flag(rmpp_recv->cur_seg_buf)) {
rmpp_recv->state = RMPP_STATE_COMPLETE;
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
done_wc = complete_rmpp(rmpp_recv);
goto out;
} else if (rmpp_recv->seg_num == rmpp_recv->newwin) {
rmpp_recv->newwin += window_size(agent);
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
ack_recv(rmpp_recv, mad_recv_wc);
goto out;
}
}
spin_unlock_irqrestore(&rmpp_recv->lock, flags);
out:
deref_rmpp_recv(rmpp_recv);
return done_wc;
drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags);
drop2: deref_rmpp_recv(rmpp_recv);
drop1: ib_free_recv_mad(mad_recv_wc);
return NULL;
}
static struct ib_mad_recv_wc *
start_rmpp(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct mad_rmpp_recv *rmpp_recv;
unsigned long flags;
rmpp_recv = create_rmpp_recv(agent, mad_recv_wc);
if (!rmpp_recv) {
ib_free_recv_mad(mad_recv_wc);
return NULL;
}
spin_lock_irqsave(&agent->lock, flags);
if (insert_rmpp_recv(agent, rmpp_recv)) {
spin_unlock_irqrestore(&agent->lock, flags);
/* duplicate first MAD */
destroy_rmpp_recv(rmpp_recv);
return continue_rmpp(agent, mad_recv_wc);
}
atomic_inc(&rmpp_recv->refcount);
if (get_last_flag(&mad_recv_wc->recv_buf)) {
rmpp_recv->state = RMPP_STATE_COMPLETE;
spin_unlock_irqrestore(&agent->lock, flags);
complete_rmpp(rmpp_recv);
} else {
spin_unlock_irqrestore(&agent->lock, flags);
/* 40 seconds until we can find the packet lifetimes */
queue_delayed_work(agent->qp_info->port_priv->wq,
&rmpp_recv->timeout_work,
msecs_to_jiffies(40000));
rmpp_recv->newwin += window_size(agent);
ack_recv(rmpp_recv, mad_recv_wc);
mad_recv_wc = NULL;
}
deref_rmpp_recv(rmpp_recv);
return mad_recv_wc;
}
static inline u64 get_seg_addr(struct ib_mad_send_wr_private *mad_send_wr)
{
return mad_send_wr->sg_list[0].addr + mad_send_wr->data_offset +
(sizeof(struct ib_rmpp_mad) - mad_send_wr->data_offset) *
(mad_send_wr->seg_num - 1);
}
static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr)
{
struct ib_rmpp_mad *rmpp_mad;
int timeout;
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(mad_send_wr->seg_num);
if (mad_send_wr->seg_num == 1) {
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST;
rmpp_mad->rmpp_hdr.paylen_newwin =
cpu_to_be32(mad_send_wr->total_seg *
(sizeof(struct ib_rmpp_mad) -
offsetof(struct ib_rmpp_mad, data)));
mad_send_wr->sg_list[0].length = sizeof(struct ib_rmpp_mad);
} else {
mad_send_wr->send_wr.num_sge = 2;
mad_send_wr->sg_list[0].length = mad_send_wr->data_offset;
mad_send_wr->sg_list[1].addr = get_seg_addr(mad_send_wr);
mad_send_wr->sg_list[1].length = sizeof(struct ib_rmpp_mad) -
mad_send_wr->data_offset;
mad_send_wr->sg_list[1].lkey = mad_send_wr->sg_list[0].lkey;
}
if (mad_send_wr->seg_num == mad_send_wr->total_seg) {
rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST;
rmpp_mad->rmpp_hdr.paylen_newwin =
cpu_to_be32(sizeof(struct ib_rmpp_mad) -
offsetof(struct ib_rmpp_mad, data) -
mad_send_wr->pad);
}
/* 2 seconds for an ACK until we can find the packet lifetime */
timeout = mad_send_wr->send_wr.wr.ud.timeout_ms;
if (!timeout || timeout > 2000)
mad_send_wr->timeout = msecs_to_jiffies(2000);
mad_send_wr->seg_num++;
return ib_send_mad(mad_send_wr);
}
static void process_rmpp_ack(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct ib_mad_send_wr_private *mad_send_wr;
struct ib_rmpp_mad *rmpp_mad;
unsigned long flags;
int seg_num, newwin, ret;
rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad;
if (rmpp_mad->rmpp_hdr.rmpp_status)
return;
seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num);
newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
spin_lock_irqsave(&agent->lock, flags);
mad_send_wr = ib_find_send_mad(agent, rmpp_mad->mad_hdr.tid);
if (!mad_send_wr)
goto out; /* Unmatched ACK */
if ((mad_send_wr->last_ack == mad_send_wr->total_seg) ||
(!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS))
goto out; /* Send is already done */
if (seg_num > mad_send_wr->total_seg)
goto out; /* Bad ACK */
if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack)
goto out; /* Old ACK */
if (seg_num > mad_send_wr->last_ack) {
mad_send_wr->last_ack = seg_num;
mad_send_wr->retries = mad_send_wr->send_wr.wr.ud.retries;
}
mad_send_wr->newwin = newwin;
if (mad_send_wr->last_ack == mad_send_wr->total_seg) {
/* If no response is expected, the ACK completes the send */
if (!mad_send_wr->send_wr.wr.ud.timeout_ms) {
struct ib_mad_send_wc wc;
ib_mark_mad_done(mad_send_wr);
spin_unlock_irqrestore(&agent->lock, flags);
wc.status = IB_WC_SUCCESS;
wc.vendor_err = 0;
wc.wr_id = mad_send_wr->wr_id;
ib_mad_complete_send_wr(mad_send_wr, &wc);
return;
}
if (mad_send_wr->refcount == 1)
ib_reset_mad_timeout(mad_send_wr, mad_send_wr->
send_wr.wr.ud.timeout_ms);
} else if (mad_send_wr->refcount == 1 &&
mad_send_wr->seg_num < mad_send_wr->newwin &&
mad_send_wr->seg_num <= mad_send_wr->total_seg) {
/* Send failure will just result in a timeout/retry */
ret = send_next_seg(mad_send_wr);
if (ret)
goto out;
mad_send_wr->refcount++;
list_del(&mad_send_wr->agent_list);
list_add_tail(&mad_send_wr->agent_list,
&mad_send_wr->mad_agent_priv->send_list);
}
out:
spin_unlock_irqrestore(&agent->lock, flags);
}
struct ib_mad_recv_wc *
ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct ib_rmpp_mad *rmpp_mad;
rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad;
if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE))
return mad_recv_wc;
if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION)
goto out;
switch (rmpp_mad->rmpp_hdr.rmpp_type) {
case IB_MGMT_RMPP_TYPE_DATA:
if (rmpp_mad->rmpp_hdr.seg_num == __constant_htonl(1))
return start_rmpp(agent, mad_recv_wc);
else
return continue_rmpp(agent, mad_recv_wc);
case IB_MGMT_RMPP_TYPE_ACK:
process_rmpp_ack(agent, mad_recv_wc);
break;
case IB_MGMT_RMPP_TYPE_STOP:
case IB_MGMT_RMPP_TYPE_ABORT:
/* TODO: process_rmpp_nack(agent, mad_recv_wc); */
break;
default:
break;
}
out:
ib_free_recv_mad(mad_recv_wc);
return NULL;
}
int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr)
{
struct ib_rmpp_mad *rmpp_mad;
int i, total_len, ret;
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE))
return IB_RMPP_RESULT_UNHANDLED;
if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA)
return IB_RMPP_RESULT_INTERNAL;
if (mad_send_wr->send_wr.num_sge > 1)
return -EINVAL; /* TODO: support num_sge > 1 */
mad_send_wr->seg_num = 1;
mad_send_wr->newwin = 1;
mad_send_wr->data_offset = data_offset(rmpp_mad->mad_hdr.mgmt_class);
total_len = 0;
for (i = 0; i < mad_send_wr->send_wr.num_sge; i++)
total_len += mad_send_wr->send_wr.sg_list[i].length;
mad_send_wr->total_seg = (total_len - mad_send_wr->data_offset) /
(sizeof(struct ib_rmpp_mad) - mad_send_wr->data_offset);
mad_send_wr->pad = total_len - offsetof(struct ib_rmpp_mad, data) -
be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin);
/* We need to wait for the final ACK even if there isn't a response */
mad_send_wr->refcount += (mad_send_wr->timeout == 0);
ret = send_next_seg(mad_send_wr);
if (!ret)
return IB_RMPP_RESULT_CONSUMED;
return ret;
}
int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc)
{
struct ib_rmpp_mad *rmpp_mad;
struct ib_mad_send_buf *msg;
int ret;
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE))
return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */
if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) {
msg = (struct ib_mad_send_buf *) (unsigned long)
mad_send_wc->wr_id;
ib_free_send_mad(msg);
return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */
}
if (mad_send_wc->status != IB_WC_SUCCESS ||
mad_send_wr->status != IB_WC_SUCCESS)
return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */
if (!mad_send_wr->timeout)
return IB_RMPP_RESULT_PROCESSED; /* Response received */
if (mad_send_wr->last_ack == mad_send_wr->total_seg) {
mad_send_wr->timeout =
msecs_to_jiffies(mad_send_wr->send_wr.wr.ud.timeout_ms);
return IB_RMPP_RESULT_PROCESSED; /* Send done */
}
if (mad_send_wr->seg_num > mad_send_wr->newwin ||
mad_send_wr->seg_num > mad_send_wr->total_seg)
return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */
ret = send_next_seg(mad_send_wr);
if (ret) {
mad_send_wc->status = IB_WC_GENERAL_ERR;
return IB_RMPP_RESULT_PROCESSED;
}
return IB_RMPP_RESULT_CONSUMED;
}
int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr)
{
struct ib_rmpp_mad *rmpp_mad;
int ret;
rmpp_mad = (struct ib_rmpp_mad *)mad_send_wr->send_wr.wr.ud.mad_hdr;
if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
IB_MGMT_RMPP_FLAG_ACTIVE))
return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */
if (mad_send_wr->last_ack == mad_send_wr->total_seg)
return IB_RMPP_RESULT_PROCESSED;
mad_send_wr->seg_num = mad_send_wr->last_ack + 1;
ret = send_next_seg(mad_send_wr);
if (ret)
return IB_RMPP_RESULT_PROCESSED;
return IB_RMPP_RESULT_CONSUMED;
}

58
drivers/infiniband/core/mad_rmpp.h Normal file
View file

@ -0,0 +1,58 @@
/*
* Copyright (c) 2005 Intel Inc. All rights reserved.
*
* 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.
*
* $Id: mad_rmpp.h 1921 2005-02-25 22:58:44Z sean.hefty $
*/
#ifndef __MAD_RMPP_H__
#define __MAD_RMPP_H__
enum {
IB_RMPP_RESULT_PROCESSED,
IB_RMPP_RESULT_CONSUMED,
IB_RMPP_RESULT_INTERNAL,
IB_RMPP_RESULT_UNHANDLED
};
int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr);
struct ib_mad_recv_wc *
ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent,
struct ib_mad_recv_wc *mad_recv_wc);
int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr,
struct ib_mad_send_wc *mad_send_wc);
void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent);
int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr);
#endif /* __MAD_RMPP_H__ */