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1/*2 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32#ifndef _CXGB3_OFFLOAD_H33#define _CXGB3_OFFLOAD_H34 35#include <linux/list.h>36#include <linux/skbuff.h>37 38#include "l2t.h"39 40#include "t3cdev.h"41#include "t3_cpl.h"42 43struct adapter;44 45void cxgb3_offload_init(void);46 47void cxgb3_adapter_ofld(struct adapter *adapter);48void cxgb3_adapter_unofld(struct adapter *adapter);49int cxgb3_offload_activate(struct adapter *adapter);50void cxgb3_offload_deactivate(struct adapter *adapter);51 52void cxgb3_set_dummy_ops(struct t3cdev *dev);53 54struct t3cdev *dev2t3cdev(struct net_device *dev);55 56/*57 * Client registration. Users of T3 driver must register themselves.58 * The T3 driver will call the add function of every client for each T359 * adapter activated, passing up the t3cdev ptr. Each client fills out an60 * array of callback functions to process CPL messages.61 */62 63void cxgb3_register_client(struct cxgb3_client *client);64void cxgb3_unregister_client(struct cxgb3_client *client);65void cxgb3_add_clients(struct t3cdev *tdev);66void cxgb3_remove_clients(struct t3cdev *tdev);67void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port);68 69typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev,70 struct sk_buff *skb, void *ctx);71 72enum {73 OFFLOAD_STATUS_UP,74 OFFLOAD_STATUS_DOWN,75 OFFLOAD_PORT_DOWN,76 OFFLOAD_PORT_UP,77 OFFLOAD_DB_FULL,78 OFFLOAD_DB_EMPTY,79 OFFLOAD_DB_DROP80};81 82struct cxgb3_client {83 char *name;84 void (*add) (struct t3cdev *);85 void (*remove) (struct t3cdev *);86 cxgb3_cpl_handler_func *handlers;87 int (*redirect)(void *ctx, struct dst_entry *old,88 struct dst_entry *new, struct l2t_entry *l2t);89 struct list_head client_list;90 void (*event_handler)(struct t3cdev *tdev, u32 event, u32 port);91};92 93/*94 * TID allocation services.95 */96int cxgb3_alloc_atid(struct t3cdev *dev, struct cxgb3_client *client,97 void *ctx);98int cxgb3_alloc_stid(struct t3cdev *dev, struct cxgb3_client *client,99 void *ctx);100void *cxgb3_free_atid(struct t3cdev *dev, int atid);101void cxgb3_free_stid(struct t3cdev *dev, int stid);102void cxgb3_insert_tid(struct t3cdev *dev, struct cxgb3_client *client,103 void *ctx, unsigned int tid);104void cxgb3_queue_tid_release(struct t3cdev *dev, unsigned int tid);105void cxgb3_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid);106 107struct t3c_tid_entry {108 struct cxgb3_client *client;109 void *ctx;110};111 112/* CPL message priority levels */113enum {114 CPL_PRIORITY_DATA = 0, /* data messages */115 CPL_PRIORITY_SETUP = 1, /* connection setup messages */116 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */117 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */118 CPL_PRIORITY_ACK = 1, /* RX ACK messages */119 CPL_PRIORITY_CONTROL = 1 /* offload control messages */120};121 122/* Flags for return value of CPL message handlers */123enum {124 CPL_RET_BUF_DONE = 1, /* buffer processing done, buffer may be freed */125 CPL_RET_BAD_MSG = 2, /* bad CPL message (e.g., unknown opcode) */126 CPL_RET_UNKNOWN_TID = 4 /* unexpected unknown TID */127};128 129typedef int (*cpl_handler_func)(struct t3cdev *dev, struct sk_buff *skb);130 131/*132 * Returns a pointer to the first byte of the CPL header in an sk_buff that133 * contains a CPL message.134 */135static inline void *cplhdr(struct sk_buff *skb)136{137 return skb->data;138}139 140void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h);141 142union listen_entry {143 struct t3c_tid_entry t3c_tid;144 union listen_entry *next;145};146 147union active_open_entry {148 struct t3c_tid_entry t3c_tid;149 union active_open_entry *next;150};151 152/*153 * Holds the size, base address, free list start, etc of the TID, server TID,154 * and active-open TID tables for a offload device.155 * The tables themselves are allocated dynamically.156 */157struct tid_info {158 struct t3c_tid_entry *tid_tab;159 unsigned int ntids;160 atomic_t tids_in_use;161 162 union listen_entry *stid_tab;163 unsigned int nstids;164 unsigned int stid_base;165 166 union active_open_entry *atid_tab;167 unsigned int natids;168 unsigned int atid_base;169 170 /*171 * The following members are accessed R/W so we put them in their own172 * cache lines.173 *174 * XXX We could combine the atid fields above with the lock here since175 * atids are use once (unlike other tids). OTOH the above fields are176 * usually in cache due to tid_tab.177 */178 spinlock_t atid_lock ____cacheline_aligned_in_smp;179 union active_open_entry *afree;180 unsigned int atids_in_use;181 182 spinlock_t stid_lock ____cacheline_aligned;183 union listen_entry *sfree;184 unsigned int stids_in_use;185};186 187struct t3c_data {188 struct list_head list_node;189 struct t3cdev *dev;190 unsigned int tx_max_chunk; /* max payload for TX_DATA */191 unsigned int max_wrs; /* max in-flight WRs per connection */192 unsigned int nmtus;193 const unsigned short *mtus;194 struct tid_info tid_maps;195 196 struct t3c_tid_entry *tid_release_list;197 spinlock_t tid_release_lock;198 struct work_struct tid_release_task;199 200 struct sk_buff *nofail_skb;201 unsigned int release_list_incomplete;202};203 204/*205 * t3cdev -> t3c_data accessor206 */207#define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt)208 209#endif210