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4d22de3e | 1 | /* |
1d68e93d | 2 | * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved. |
4d22de3e DLR |
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 | ||
43 | struct adapter; | |
44 | ||
45 | void cxgb3_offload_init(void); | |
46 | ||
47 | void cxgb3_adapter_ofld(struct adapter *adapter); | |
48 | void cxgb3_adapter_unofld(struct adapter *adapter); | |
49 | int cxgb3_offload_activate(struct adapter *adapter); | |
50 | void cxgb3_offload_deactivate(struct adapter *adapter); | |
51 | ||
52 | void 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 | ||
61 | void cxgb3_register_client(struct cxgb3_client *client); | |
62 | void cxgb3_unregister_client(struct cxgb3_client *client); | |
63 | void cxgb3_add_clients(struct t3cdev *tdev); | |
64 | void cxgb3_remove_clients(struct t3cdev *tdev); | |
65 | ||
66 | typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev, | |
67 | struct sk_buff *skb, void *ctx); | |
68 | ||
69 | struct 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 | */ | |
82 | int cxgb3_alloc_atid(struct t3cdev *dev, struct cxgb3_client *client, | |
83 | void *ctx); | |
84 | int cxgb3_alloc_stid(struct t3cdev *dev, struct cxgb3_client *client, | |
85 | void *ctx); | |
86 | void *cxgb3_free_atid(struct t3cdev *dev, int atid); | |
87 | void cxgb3_free_stid(struct t3cdev *dev, int stid); | |
88 | void cxgb3_insert_tid(struct t3cdev *dev, struct cxgb3_client *client, | |
89 | void *ctx, unsigned int tid); | |
90 | void cxgb3_queue_tid_release(struct t3cdev *dev, unsigned int tid); | |
91 | void cxgb3_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid); | |
92 | ||
93 | struct t3c_tid_entry { | |
94 | struct cxgb3_client *client; | |
95 | void *ctx; | |
96 | }; | |
97 | ||
98 | /* CPL message priority levels */ | |
99 | enum { | |
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 */ | |
109 | enum { | |
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 | ||
115 | typedef 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 | */ | |
121 | static inline void *cplhdr(struct sk_buff *skb) | |
122 | { | |
123 | return skb->data; | |
124 | } | |
125 | ||
126 | void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h); | |
127 | ||
128 | union listen_entry { | |
129 | struct t3c_tid_entry t3c_tid; | |
130 | union listen_entry *next; | |
131 | }; | |
132 | ||
133 | union 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 | */ | |
143 | struct 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 | /* | |
157 | * The following members are accessed R/W so we put them in their own | |
158 | * cache lines. | |
159 | * | |
160 | * XXX We could combine the atid fields above with the lock here since | |
161 | * atids are use once (unlike other tids). OTOH the above fields are | |
162 | * usually in cache due to tid_tab. | |
163 | */ | |
164 | spinlock_t atid_lock ____cacheline_aligned_in_smp; | |
165 | union active_open_entry *afree; | |
166 | unsigned int atids_in_use; | |
167 | ||
168 | spinlock_t stid_lock ____cacheline_aligned; | |
169 | union listen_entry *sfree; | |
170 | unsigned int stids_in_use; | |
171 | }; | |
172 | ||
173 | struct t3c_data { | |
174 | struct list_head list_node; | |
175 | struct t3cdev *dev; | |
176 | unsigned int tx_max_chunk; /* max payload for TX_DATA */ | |
177 | unsigned int max_wrs; /* max in-flight WRs per connection */ | |
178 | unsigned int nmtus; | |
179 | const unsigned short *mtus; | |
180 | struct tid_info tid_maps; | |
181 | ||
182 | struct t3c_tid_entry *tid_release_list; | |
183 | spinlock_t tid_release_lock; | |
184 | struct work_struct tid_release_task; | |
185 | }; | |
186 | ||
187 | /* | |
188 | * t3cdev -> t3c_data accessor | |
189 | */ | |
190 | #define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt) | |
191 | ||
192 | #endif |