1/* 2 * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * 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 OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32#ifndef _CXGB3_OFFLOAD_H 33#define _CXGB3_OFFLOAD_H 34 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 54/* 55 * Client registration. Users of T3 driver must register themselves. 56 * The T3 driver will call the add function of every client for each T3 57 * adapter activated, passing up the t3cdev ptr. Each client fills out an 58 * array of callback functions to process CPL messages. 59 */ 60 61void cxgb3_register_client(struct cxgb3_client *client); 62void cxgb3_unregister_client(struct cxgb3_client *client); 63void cxgb3_add_clients(struct t3cdev *tdev); 64void cxgb3_remove_clients(struct t3cdev *tdev); 65 66typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev, 67 struct sk_buff *skb, void *ctx); 68 69struct cxgb3_client { 70 char *name; 71 void (*add) (struct t3cdev *); 72 void (*remove) (struct t3cdev *); 73 cxgb3_cpl_handler_func *handlers; 74 int (*redirect)(void *ctx, struct dst_entry *old, 75 struct dst_entry *new, struct l2t_entry *l2t); 76 struct list_head client_list; 77}; 78 79/* 80 * TID allocation services. 81 */ 82int cxgb3_alloc_atid(struct t3cdev *dev, struct cxgb3_client *client, 83 void *ctx); 84int cxgb3_alloc_stid(struct t3cdev *dev, struct cxgb3_client *client, 85 void *ctx); 86void *cxgb3_free_atid(struct t3cdev *dev, int atid); 87void cxgb3_free_stid(struct t3cdev *dev, int stid); 88void cxgb3_insert_tid(struct t3cdev *dev, struct cxgb3_client *client, 89 void *ctx, unsigned int tid); 90void cxgb3_queue_tid_release(struct t3cdev *dev, unsigned int tid); 91void cxgb3_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid); 92 93struct t3c_tid_entry { 94 struct cxgb3_client *client; 95 void *ctx; 96}; 97 98/* CPL message priority levels */ 99enum { 100 CPL_PRIORITY_DATA = 0, /* data messages */ 101 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 102 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 103 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 104 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 105 CPL_PRIORITY_CONTROL = 1 /* offload control messages */ 106}; 107 108/* Flags for return value of CPL message handlers */ 109enum { 110 CPL_RET_BUF_DONE = 1, /* buffer processing done, buffer may be freed */ 111 CPL_RET_BAD_MSG = 2, /* bad CPL message (e.g., unknown opcode) */ 112 CPL_RET_UNKNOWN_TID = 4 /* unexpected unknown TID */ 113}; 114 115typedef int (*cpl_handler_func)(struct t3cdev *dev, struct sk_buff *skb); 116 117/* 118 * Returns a pointer to the first byte of the CPL header in an sk_buff that 119 * contains a CPL message. 120 */ 121static inline void *cplhdr(struct sk_buff *skb) 122{ 123 return skb->data; 124} 125 126void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h); 127 128union listen_entry { 129 struct t3c_tid_entry t3c_tid; 130 union listen_entry *next; 131}; 132 133union active_open_entry { 134 struct t3c_tid_entry t3c_tid; 135 union active_open_entry *next; 136}; 137 138/* 139 * Holds the size, base address, free list start, etc of the TID, server TID, 140 * and active-open TID tables for a offload device. 141 * The tables themselves are allocated dynamically. 142 */ 143struct tid_info { 144 struct t3c_tid_entry *tid_tab; 145 unsigned int ntids; 146 atomic_t tids_in_use; 147 148 union listen_entry *stid_tab; 149 unsigned int nstids; 150 unsigned int stid_base; 151 152 union active_open_entry *atid_tab; 153 unsigned int natids; 154 unsigned int atid_base; 155 156 spinlock_t atid_lock ____cacheline_aligned_in_smp; 157 union active_open_entry *afree; 158 unsigned int atids_in_use; 159 160 spinlock_t stid_lock ____cacheline_aligned; 161 union listen_entry *sfree; 162 unsigned int stids_in_use; 163}; 164 165struct t3c_data { 166 struct list_head list_node; 167 struct t3cdev *dev; 168 unsigned int tx_max_chunk; /* max payload for TX_DATA */ 169 unsigned int max_wrs; /* max in-flight WRs per connection */ 170 unsigned int nmtus; 171 const unsigned short *mtus; 172 struct tid_info tid_maps; 173 174 struct t3c_tid_entry *tid_release_list; 175 spinlock_t tid_release_lock; 176 struct work_struct tid_release_task; 177}; 178 179/* 180 * t3cdev -> t3c_data accessor 181 */ 182#define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt) 183 184#endif 185