The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/dev/cxgb/cxgb_offload.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    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: releng/8.4/sys/dev/cxgb/cxgb_offload.h 206220 2010-04-05 23:29:27Z np $
   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

Cache object: 545396c1e975a30e0ce11a3793519fe5


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.