[openib-general] [PATCH 19/29v2] Add RMPP implementation
Hal Rosenstock
halr at voltaire.com
Mon Jul 11 13:36:11 PDT 2005
Add RMPP implementation
Signed-off-by: Sean Hefty <sean.hefty at intel.com>
Signed-off-by: Hal Rosenstock <halr at voltaire.com>
This patch depends on patch 18/29.
--
Makefile | 2
mad.c | 167 +++++++++--
mad_priv.h | 28 +-
mad_rmpp.c | 765 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mad_rmpp.h | 58 ++++
5 files changed, 968 insertions(+), 52 deletions(-)
diff -uprN linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad.c linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad.c
-- linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad.c 2005-07-11 13:39:53.000000000 -0400
+++ linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad.c 2005-07-11 13:40:04.000000000 -0400
@@ -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
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_age
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_age
/* 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_age
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
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,
@@ -689,7 +692,7 @@ static int handle_outgoing_dr_smp(struct
kfree(local);
goto out;
}
-
+
build_smp_wc(send_wr->wr_id, smp->dr_slid, send_wr->wr.ud.pkey_index,
send_wr->wr.ud.port_num, &mad_wc);
@@ -705,7 +708,7 @@ static int handle_outgoing_dr_smp(struct
local->mad_priv = mad_priv;
local->recv_mad_agent = mad_agent_priv;
/*
- * Reference MAD agent until receive
+ * Reference MAD agent until receive
* side of local completion handled
*/
atomic_inc(&mad_agent_priv->refcount);
@@ -786,12 +789,15 @@ struct ib_mad_send_buf * ib_create_send_
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_
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
}
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
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_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 @@ out:
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_privat
*/
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_privat
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
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
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_
/*
* 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(stru
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(stru
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_p
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
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
module_init(ib_mad_init_module);
module_exit(ib_mad_cleanup_module);
+
diff -uprN linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_priv.h linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_priv.h
-- linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_priv.h 2005-07-09 17:57:55.000000000 -0400
+++ linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_priv.h 2005-07-10 12:12:10.000000000 -0400
@@ -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__ */
diff -uprN linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_rmpp.c linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_rmpp.c
-- linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_rmpp.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_rmpp.c 2005-07-06 16:52:21.000000000 -0400
@@ -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;
+}
diff -uprN linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_rmpp.h linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_rmpp.h
-- linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/mad_rmpp.h 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/mad_rmpp.h 2005-07-06 16:55:32.000000000 -0400
@@ -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__ */
diff -uprN linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/Makefile linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/Makefile
-- linux-2.6.13-rc2-mm1-18/drivers/infiniband/core/Makefile 2005-07-10 16:30:24.000000000 -0400
+++ linux-2.6.13-rc2-mm1-19/drivers/infiniband/core/Makefile 2005-07-10 16:32:15.000000000 -0400
@@ -6,7 +6,7 @@ obj-$(CONFIG_INFINIBAND_USER_VERBS) += i
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
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