1 2 /************************************************************************** 3 4 Copyright (c) 2007-2008, Chelsio Inc. 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Neither the name of the Chelsio Corporation nor the names of its 14 contributors may be used to endorse or promote products derived from 15 this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 POSSIBILITY OF SUCH DAMAGE. 28 29 $FreeBSD$ 30 31 ***************************************************************************/ 32 33 #ifndef _CXGB_OFFLOAD_H 34 #define _CXGB_OFFLOAD_H 35 36 #include <common/cxgb_tcb.h> 37 #include <t3cdev.h> 38 39 MALLOC_DECLARE(M_CXGB); 40 41 struct adapter; 42 struct cxgb_client; 43 44 void cxgb_offload_init(void); 45 void cxgb_offload_exit(void); 46 47 void cxgb_adapter_ofld(struct adapter *adapter); 48 void cxgb_adapter_unofld(struct adapter *adapter); 49 int cxgb_offload_activate(struct adapter *adapter); 50 void cxgb_offload_deactivate(struct adapter *adapter); 51 int cxgb_ofld_recv(struct t3cdev *dev, struct mbuf **m, int n); 52 53 void cxgb_set_dummy_ops(struct t3cdev *dev); 54 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 T3 59 * adapter activated, passing up the t3cdev ptr. Each client fills out an 60 * array of callback functions to process CPL messages. 61 */ 62 63 void cxgb_register_client(struct cxgb_client *client); 64 void cxgb_unregister_client(struct cxgb_client *client); 65 void cxgb_add_clients(struct t3cdev *tdev); 66 void cxgb_remove_clients(struct t3cdev *tdev); 67 68 typedef int (*cxgb_cpl_handler_func)(struct t3cdev *dev, 69 struct mbuf *m, void *ctx); 70 71 struct l2t_entry; 72 struct cxgb_client { 73 char *name; 74 void (*add) (struct t3cdev *); 75 void (*remove) (struct t3cdev *); 76 cxgb_cpl_handler_func *handlers; 77 int (*redirect)(void *ctx, struct rtentry *old, 78 struct rtentry *new, 79 struct l2t_entry *l2t); 80 TAILQ_ENTRY(cxgb_client) client_entry; 81 }; 82 83 /* 84 * TID allocation services. 85 */ 86 int cxgb_alloc_atid(struct t3cdev *dev, struct cxgb_client *client, 87 void *ctx); 88 int cxgb_alloc_stid(struct t3cdev *dev, struct cxgb_client *client, 89 void *ctx); 90 void *cxgb_free_atid(struct t3cdev *dev, int atid); 91 void cxgb_free_stid(struct t3cdev *dev, int stid); 92 void *cxgb_get_lctx(struct t3cdev *tdev, int stid); 93 void cxgb_insert_tid(struct t3cdev *dev, struct cxgb_client *client, 94 void *ctx, 95 unsigned int tid); 96 void cxgb_queue_tid_release(struct t3cdev *dev, unsigned int tid); 97 void cxgb_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid); 98 99 struct toe_tid_entry { 100 struct cxgb_client *client; 101 void *ctx; 102 }; 103 104 /* CPL message priority levels */ 105 enum { 106 CPL_PRIORITY_DATA = 0, /* data messages */ 107 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 108 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 109 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 110 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 111 CPL_PRIORITY_CONTROL = 1 /* offload control messages */ 112 }; 113 114 /* Flags for return value of CPL message handlers */ 115 enum { 116 CPL_RET_BUF_DONE = 1, // buffer processing done, buffer may be freed 117 CPL_RET_BAD_MSG = 2, // bad CPL message (e.g., unknown opcode) 118 CPL_RET_UNKNOWN_TID = 4 // unexpected unknown TID 119 }; 120 121 typedef int (*cpl_handler_func)(struct t3cdev *dev, struct mbuf *m); 122 123 /* 124 * Returns a pointer to the first byte of the CPL header in an sk_buff that 125 * contains a CPL message. 126 */ 127 static inline void *cplhdr(struct mbuf *m) 128 { 129 return mtod(m, uint8_t *); 130 } 131 132 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h); 133 134 union listen_entry { 135 struct toe_tid_entry toe_tid; 136 union listen_entry *next; 137 }; 138 139 union active_open_entry { 140 struct toe_tid_entry toe_tid; 141 union active_open_entry *next; 142 }; 143 144 /* 145 * Holds the size, base address, free list start, etc of the TID, server TID, 146 * and active-open TID tables for a offload device. 147 * The tables themselves are allocated dynamically. 148 */ 149 struct tid_info { 150 struct toe_tid_entry *tid_tab; 151 unsigned int ntids; 152 volatile unsigned int tids_in_use; 153 154 union listen_entry *stid_tab; 155 unsigned int nstids; 156 unsigned int stid_base; 157 158 union active_open_entry *atid_tab; 159 unsigned int natids; 160 unsigned int atid_base; 161 162 /* 163 * The following members are accessed R/W so we put them in their own 164 * cache lines. 165 * 166 * XXX We could combine the atid fields above with the lock here since 167 * atids are use once (unlike other tids). OTOH the above fields are 168 * usually in cache due to tid_tab. 169 */ 170 struct mtx atid_lock /* ____cacheline_aligned_in_smp */; 171 union active_open_entry *afree; 172 unsigned int atids_in_use; 173 174 struct mtx stid_lock /*____cacheline_aligned */; 175 union listen_entry *sfree; 176 unsigned int stids_in_use; 177 }; 178 179 struct t3c_data { 180 struct t3cdev *dev; 181 unsigned int tx_max_chunk; /* max payload for TX_DATA */ 182 unsigned int max_wrs; /* max in-flight WRs per connection */ 183 unsigned int nmtus; 184 const unsigned short *mtus; 185 struct tid_info tid_maps; 186 187 struct toe_tid_entry *tid_release_list; 188 struct mtx tid_release_lock; 189 struct task tid_release_task; 190 }; 191 192 /* 193 * t3cdev -> toe_data accessor 194 */ 195 #define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt) 196 197 /* 198 * Map an ATID or STID to their entries in the corresponding TID tables. 199 */ 200 static inline union active_open_entry *atid2entry(const struct tid_info *t, 201 unsigned int atid) 202 { 203 return &t->atid_tab[atid - t->atid_base]; 204 } 205 206 207 static inline union listen_entry *stid2entry(const struct tid_info *t, 208 unsigned int stid) 209 { 210 return &t->stid_tab[stid - t->stid_base]; 211 } 212 213 /* 214 * Find the connection corresponding to a TID. 215 */ 216 static inline struct toe_tid_entry *lookup_tid(const struct tid_info *t, 217 unsigned int tid) 218 { 219 return tid < t->ntids ? &(t->tid_tab[tid]) : NULL; 220 } 221 222 /* 223 * Find the connection corresponding to a server TID. 224 */ 225 static inline struct toe_tid_entry *lookup_stid(const struct tid_info *t, 226 unsigned int tid) 227 { 228 if (tid < t->stid_base || tid >= t->stid_base + t->nstids) 229 return NULL; 230 return &(stid2entry(t, tid)->toe_tid); 231 } 232 233 /* 234 * Find the connection corresponding to an active-open TID. 235 */ 236 static inline struct toe_tid_entry *lookup_atid(const struct tid_info *t, 237 unsigned int tid) 238 { 239 if (tid < t->atid_base || tid >= t->atid_base + t->natids) 240 return NULL; 241 return &(atid2entry(t, tid)->toe_tid); 242 } 243 244 void *cxgb_alloc_mem(unsigned long size); 245 void cxgb_free_mem(void *addr); 246 void cxgb_neigh_update(struct rtentry *rt, uint8_t *enaddr, struct sockaddr *sa); 247 void cxgb_redirect(struct rtentry *old, struct rtentry *new, struct sockaddr *sa); 248 int process_rx(struct t3cdev *dev, struct mbuf **m, int n); 249 int attach_t3cdev(struct t3cdev *dev); 250 void detach_t3cdev(struct t3cdev *dev); 251 252 #define CXGB_UNIMPLEMENTED() panic("IMPLEMENT: %s:%s:%d", __FUNCTION__, __FILE__, __LINE__) 253 #endif 254