| /* |
| * 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; |
| |
| __be64 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 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 int alloc_response_msg(struct ib_mad_agent *agent, |
| struct ib_mad_recv_wc *recv_wc, |
| struct ib_mad_send_buf **msg) |
| { |
| struct ib_mad_send_buf *m; |
| struct ib_ah *ah; |
| int hdr_len; |
| |
| ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, |
| recv_wc->recv_buf.grh, agent->port_num); |
| if (IS_ERR(ah)) |
| return PTR_ERR(ah); |
| |
| hdr_len = sizeof(struct ib_mad_hdr) + sizeof(struct ib_rmpp_hdr); |
| m = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
| recv_wc->wc->pkey_index, ah, 1, hdr_len, |
| sizeof(struct ib_rmpp_mad) - hdr_len, |
| GFP_KERNEL); |
| if (IS_ERR(m)) { |
| ib_destroy_ah(ah); |
| return PTR_ERR(m); |
| } |
| *msg = m; |
| return 0; |
| } |
| |
| static void free_msg(struct ib_mad_send_buf *msg) |
| { |
| ib_destroy_ah(msg->send_wr.wr.ud.ah); |
| ib_free_send_mad(msg); |
| } |
| |
| static void nack_recv(struct ib_mad_agent_private *agent, |
| struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) |
| { |
| struct ib_mad_send_buf *msg; |
| struct ib_rmpp_mad *rmpp_mad; |
| struct ib_send_wr *bad_send_wr; |
| int ret; |
| |
| ret = alloc_response_msg(&agent->agent, recv_wc, &msg); |
| if (ret) |
| return; |
| |
| rmpp_mad = (struct ib_rmpp_mad *) msg->mad; |
| memcpy(rmpp_mad, recv_wc->recv_buf.mad, |
| data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class)); |
| |
| rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; |
| rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; |
| rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; |
| ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
| rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; |
| rmpp_mad->rmpp_hdr.seg_num = 0; |
| rmpp_mad->rmpp_hdr.paylen_newwin = 0; |
| |
| ret = ib_post_send_mad(&agent->agent, &msg->send_wr, &bad_send_wr); |
| if (ret) |
| free_msg(msg); |
| } |
| |
| 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); |
| |
| rmpp_wc = rmpp_recv->rmpp_wc; |
| nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
| 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 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 = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
| if (pad > IB_MGMT_RMPP_DATA || 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; |
| u32 paylen; |
| |
| 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; |
| paylen = mad_send_wr->total_seg * IB_MGMT_RMPP_DATA - |
| mad_send_wr->pad; |
| rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
| 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; |
| rmpp_mad->rmpp_hdr.paylen_newwin = 0; |
| } |
| |
| if (mad_send_wr->seg_num == mad_send_wr->total_seg) { |
| rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
| paylen = IB_MGMT_RMPP_DATA - mad_send_wr->pad; |
| rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
| } |
| |
| /* 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 abort_send(struct ib_mad_agent_private *agent, __be64 tid, |
| u8 rmpp_status) |
| { |
| struct ib_mad_send_wr_private *mad_send_wr; |
| struct ib_mad_send_wc wc; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&agent->lock, flags); |
| mad_send_wr = ib_find_send_mad(agent, tid); |
| if (!mad_send_wr) |
| goto out; /* Unmatched send */ |
| |
| 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 */ |
| |
| ib_mark_mad_done(mad_send_wr); |
| spin_unlock_irqrestore(&agent->lock, flags); |
| |
| wc.status = IB_WC_REM_ABORT_ERR; |
| wc.vendor_err = rmpp_status; |
| wc.wr_id = mad_send_wr->wr_id; |
| ib_mad_complete_send_wr(mad_send_wr, &wc); |
| return; |
| out: |
| spin_unlock_irqrestore(&agent->lock, flags); |
| } |
| |
| 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) { |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| return; |
| } |
| |
| seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); |
| newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
| if (newwin < seg_num) { |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_W2S); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
| return; |
| } |
| |
| 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 || seg_num > mad_send_wr->newwin) { |
| spin_unlock_irqrestore(&agent->lock, flags); |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_S2B); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
| return; |
| } |
| |
| 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); |
| } |
| |
| static struct ib_mad_recv_wc * |
| process_rmpp_data(struct ib_mad_agent_private *agent, |
| struct ib_mad_recv_wc *mad_recv_wc) |
| { |
| struct ib_rmpp_hdr *rmpp_hdr; |
| u8 rmpp_status; |
| |
| rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; |
| |
| if (rmpp_hdr->rmpp_status) { |
| rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; |
| goto bad; |
| } |
| |
| if (rmpp_hdr->seg_num == __constant_htonl(1)) { |
| if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { |
| rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
| goto bad; |
| } |
| return start_rmpp(agent, mad_recv_wc); |
| } else { |
| if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { |
| rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; |
| goto bad; |
| } |
| return continue_rmpp(agent, mad_recv_wc); |
| } |
| bad: |
| nack_recv(agent, mad_recv_wc, rmpp_status); |
| ib_free_recv_mad(mad_recv_wc); |
| return NULL; |
| } |
| |
| static void process_rmpp_stop(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_status != IB_MGMT_RMPP_STATUS_RESX) { |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| } else |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| rmpp_mad->rmpp_hdr.rmpp_status); |
| } |
| |
| static void process_rmpp_abort(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_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || |
| rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
| } else |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| rmpp_mad->rmpp_hdr.rmpp_status); |
| } |
| |
| 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) { |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_UNV); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
| goto out; |
| } |
| |
| switch (rmpp_mad->rmpp_hdr.rmpp_type) { |
| case IB_MGMT_RMPP_TYPE_DATA: |
| return process_rmpp_data(agent, mad_recv_wc); |
| case IB_MGMT_RMPP_TYPE_ACK: |
| process_rmpp_ack(agent, mad_recv_wc); |
| break; |
| case IB_MGMT_RMPP_TYPE_STOP: |
| process_rmpp_stop(agent, mad_recv_wc); |
| break; |
| case IB_MGMT_RMPP_TYPE_ABORT: |
| process_rmpp_abort(agent, mad_recv_wc); |
| break; |
| default: |
| abort_send(agent, rmpp_mad->mad_hdr.tid, |
| IB_MGMT_RMPP_STATUS_BADT); |
| nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
| 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; |
| if (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_ACK) |
| ib_free_send_mad(msg); |
| else |
| free_msg(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; |
| } |