2 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
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32 #ifndef _CXGB3_OFFLOAD_H
33 #define _CXGB3_OFFLOAD_H
35 #include <linux/list.h>
36 #include <linux/skbuff.h>
45 void cxgb3_offload_init(void);
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);
52 void cxgb3_set_dummy_ops(struct t3cdev *dev);
54 struct t3cdev *dev2t3cdev(struct net_device *dev);
57 * Client registration. Users of T3 driver must register themselves.
58 * The T3 driver will call the add function of every client for each T3
59 * adapter activated, passing up the t3cdev ptr. Each client fills out an
60 * array of callback functions to process CPL messages.
63 void cxgb3_register_client(struct cxgb3_client *client);
64 void cxgb3_unregister_client(struct cxgb3_client *client);
65 void cxgb3_add_clients(struct t3cdev *tdev);
66 void cxgb3_remove_clients(struct t3cdev *tdev);
67 void cxgb3_err_notify(struct t3cdev *tdev, u32 status, u32 error);
69 typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev,
70 struct sk_buff *skb, void *ctx);
79 void (*add) (struct t3cdev *);
80 void (*remove) (struct t3cdev *);
81 cxgb3_cpl_handler_func *handlers;
82 int (*redirect)(void *ctx, struct dst_entry *old,
83 struct dst_entry *new, struct l2t_entry *l2t);
84 struct list_head client_list;
85 void (*err_handler)(struct t3cdev *tdev, u32 status, u32 error);
89 * TID allocation services.
91 int cxgb3_alloc_atid(struct t3cdev *dev, struct cxgb3_client *client,
93 int cxgb3_alloc_stid(struct t3cdev *dev, struct cxgb3_client *client,
95 void *cxgb3_free_atid(struct t3cdev *dev, int atid);
96 void cxgb3_free_stid(struct t3cdev *dev, int stid);
97 void cxgb3_insert_tid(struct t3cdev *dev, struct cxgb3_client *client,
98 void *ctx, unsigned int tid);
99 void cxgb3_queue_tid_release(struct t3cdev *dev, unsigned int tid);
100 void cxgb3_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid);
102 struct t3c_tid_entry {
103 struct cxgb3_client *client;
107 /* CPL message priority levels */
109 CPL_PRIORITY_DATA = 0, /* data messages */
110 CPL_PRIORITY_SETUP = 1, /* connection setup messages */
111 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */
112 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */
113 CPL_PRIORITY_ACK = 1, /* RX ACK messages */
114 CPL_PRIORITY_CONTROL = 1 /* offload control messages */
117 /* Flags for return value of CPL message handlers */
119 CPL_RET_BUF_DONE = 1, /* buffer processing done, buffer may be freed */
120 CPL_RET_BAD_MSG = 2, /* bad CPL message (e.g., unknown opcode) */
121 CPL_RET_UNKNOWN_TID = 4 /* unexpected unknown TID */
124 typedef int (*cpl_handler_func)(struct t3cdev *dev, struct sk_buff *skb);
127 * Returns a pointer to the first byte of the CPL header in an sk_buff that
128 * contains a CPL message.
130 static inline void *cplhdr(struct sk_buff *skb)
135 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h);
138 struct t3c_tid_entry t3c_tid;
139 union listen_entry *next;
142 union active_open_entry {
143 struct t3c_tid_entry t3c_tid;
144 union active_open_entry *next;
148 * Holds the size, base address, free list start, etc of the TID, server TID,
149 * and active-open TID tables for a offload device.
150 * The tables themselves are allocated dynamically.
153 struct t3c_tid_entry *tid_tab;
155 atomic_t tids_in_use;
157 union listen_entry *stid_tab;
159 unsigned int stid_base;
161 union active_open_entry *atid_tab;
163 unsigned int atid_base;
166 * The following members are accessed R/W so we put them in their own
169 * XXX We could combine the atid fields above with the lock here since
170 * atids are use once (unlike other tids). OTOH the above fields are
171 * usually in cache due to tid_tab.
173 spinlock_t atid_lock ____cacheline_aligned_in_smp;
174 union active_open_entry *afree;
175 unsigned int atids_in_use;
177 spinlock_t stid_lock ____cacheline_aligned;
178 union listen_entry *sfree;
179 unsigned int stids_in_use;
183 struct list_head list_node;
185 unsigned int tx_max_chunk; /* max payload for TX_DATA */
186 unsigned int max_wrs; /* max in-flight WRs per connection */
188 const unsigned short *mtus;
189 struct tid_info tid_maps;
191 struct t3c_tid_entry *tid_release_list;
192 spinlock_t tid_release_lock;
193 struct work_struct tid_release_task;
197 * t3cdev -> t3c_data accessor
199 #define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt)