5045 use atomic_{inc,dec}_* instead of atomic_add_*

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 #ifndef _SYS_AGGR_IMPL_H
  27 #define _SYS_AGGR_IMPL_H
  28 
  29 #include <sys/types.h>
  30 #include <sys/cred.h>
  31 #include <sys/mac_ether.h>
  32 #include <sys/mac_provider.h>
  33 #include <sys/mac_client.h>
  34 #include <sys/mac_client_priv.h>
  35 #include <sys/aggr_lacp.h>
  36 
  37 #ifdef  __cplusplus
  38 extern "C" {
  39 #endif
  40 
  41 #ifdef _KERNEL
  42 
  43 #define AGGR_MINOR_CTL  1               /* control interface minor */
  44 
  45 /* flags for aggr_grp_modify() */
  46 #define AGGR_MODIFY_POLICY              0x01
  47 #define AGGR_MODIFY_MAC                 0x02
  48 #define AGGR_MODIFY_LACP_MODE           0x04
  49 #define AGGR_MODIFY_LACP_TIMER          0x08
  50 
  51 /*
  52  * Possible value of aggr_rseudo_rx_ring_t.arr_flags. Set when the ring entry
  53  * in the pseudo RX group is used.
  54  */
  55 #define MAC_PSEUDO_RING_INUSE   0x01
  56 
  57 typedef struct aggr_unicst_addr_s {
  58         uint8_t                         aua_addr[ETHERADDRL];
  59         struct aggr_unicst_addr_s       *aua_next;
  60 } aggr_unicst_addr_t;
  61 
  62 typedef struct aggr_pseudo_rx_ring_s {
  63         mac_ring_handle_t       arr_rh; /* filled in by aggr_fill_ring() */
  64         struct aggr_port_s      *arr_port;
  65         mac_ring_handle_t       arr_hw_rh;
  66         uint_t                  arr_flags;
  67         uint64_t                arr_gen;
  68 } aggr_pseudo_rx_ring_t;
  69 
  70 typedef struct aggr_pseudo_rx_group_s {
  71         struct aggr_grp_s       *arg_grp; /* filled in by aggr_fill_group() */
  72         mac_group_handle_t      arg_gh;   /* filled in by aggr_fill_group() */
  73         aggr_unicst_addr_t      *arg_macaddr;
  74         aggr_pseudo_rx_ring_t   arg_rings[MAX_RINGS_PER_GROUP];
  75         uint_t                  arg_ring_cnt;
  76 } aggr_pseudo_rx_group_t;
  77 
  78 typedef struct aggr_pseudo_tx_ring_s {
  79         mac_ring_handle_t       atr_rh; /* filled in by aggr_fill_ring() */
  80         struct aggr_port_s      *atr_port;
  81         mac_ring_handle_t       atr_hw_rh;
  82         uint_t                  atr_flags;
  83 } aggr_pseudo_tx_ring_t;
  84 
  85 typedef struct aggr_pseudo_tx_group_s {
  86         mac_group_handle_t      atg_gh; /* filled in by aggr_fill_group() */
  87         uint_t                  atg_ring_cnt;
  88         aggr_pseudo_tx_ring_t   atg_rings[MAX_RINGS_PER_GROUP];
  89 } aggr_pseudo_tx_group_t;
  90 
  91 /*
  92  * A link aggregation MAC port.
  93  * Note that lp_next is protected by the lg_lock of the group the
  94  * port is part of.
  95  */
  96 typedef struct aggr_port_s {
  97         struct aggr_port_s *lp_next;
  98         struct aggr_grp_s *lp_grp;              /* back ptr to group */
  99         datalink_id_t   lp_linkid;
 100         uint16_t        lp_portid;
 101         uint8_t         lp_addr[ETHERADDRL];    /* port MAC address */
 102         uint32_t        lp_refs;                /* refcount */
 103         aggr_port_state_t lp_state;
 104         uint32_t        lp_started : 1,
 105                         lp_tx_enabled : 1,
 106                         lp_collector_enabled : 1,
 107                         lp_promisc_on : 1,
 108                         lp_no_link_update : 1,
 109                         lp_rx_grp_added : 1,
 110                         lp_tx_grp_added : 1,
 111                         lp_closing : 1,
 112                         lp_pad_bits : 24;
 113         mac_handle_t    lp_mh;
 114         mac_client_handle_t lp_mch;
 115         const mac_info_t *lp_mip;
 116         mac_notify_handle_t lp_mnh;
 117         uint_t          lp_tx_idx;              /* idx in group's tx array */
 118         uint64_t        lp_ifspeed;
 119         link_state_t    lp_link_state;
 120         link_duplex_t   lp_link_duplex;
 121         uint64_t        lp_stat[MAC_NSTAT];
 122         uint64_t        lp_ether_stat[ETHER_NSTAT];
 123         aggr_lacp_port_t lp_lacp;               /* LACP state */
 124         lacp_stats_t    lp_lacp_stats;
 125         uint32_t        lp_margin;
 126         mac_promisc_handle_t lp_mphp;
 127         mac_unicast_handle_t lp_mah;
 128 
 129         /* List of non-primary addresses that requires promiscous mode set */
 130         aggr_unicst_addr_t      *lp_prom_addr;
 131         /* handle of the underlying HW RX group */
 132         mac_group_handle_t      lp_hwgh;
 133         int                     lp_tx_ring_cnt;
 134         /* handles of the underlying HW TX rings */
 135         mac_ring_handle_t       *lp_tx_rings;
 136         /*
 137          * Handles of the pseudo TX rings. Each of them maps to
 138          * corresponding hardware TX ring in lp_tx_rings[]. A
 139          * pseudo TX ring is presented to aggr primary mac
 140          * client even when underlying NIC has no TX ring.
 141          */
 142         mac_ring_handle_t       *lp_pseudo_tx_rings;
 143         void                    *lp_tx_notify_mh;
 144 } aggr_port_t;
 145 
 146 /*
 147  * A link aggregation group.
 148  *
 149  * The following per-group flags are defined:
 150  *
 151  * - lg_addr_fixed: set when the MAC address has been explicitely set
 152  *   when the group was created, or by a m_unicst_set() request.
 153  *   If this flag is not set, the MAC address of the group will be
 154  *   set to the first port that is added to the group.
 155  *
 156  * - lg_add_set: used only when lg_addr_fixed is not set. Captures whether
 157  *   the MAC address was initialized according to the members of the group.
 158  *   When set, the lg_port field points to the port from which the
 159  *   MAC address was initialized.
 160  *
 161  */
 162 typedef struct aggr_grp_s {
 163         datalink_id_t   lg_linkid;
 164         uint16_t        lg_key;                 /* key (group port number) */
 165         uint32_t        lg_refs;                /* refcount */
 166         uint16_t        lg_nports;              /* number of MAC ports */
 167         uint8_t         lg_addr[ETHERADDRL];    /* group MAC address */
 168         uint16_t
 169                         lg_closing : 1,
 170                         lg_addr_fixed : 1,      /* fixed MAC address? */
 171                         lg_started : 1,         /* group started? */
 172                         lg_promisc : 1,         /* in promiscuous mode? */
 173                         lg_zcopy : 1,
 174                         lg_vlan : 1,
 175                         lg_force : 1,
 176                         lg_lso : 1,
 177                         lg_pad_bits : 8;
 178         aggr_port_t     *lg_ports;              /* list of configured ports */
 179         aggr_port_t     *lg_mac_addr_port;
 180         mac_handle_t    lg_mh;
 181         zoneid_t        lg_zoneid;
 182         uint_t          lg_nattached_ports;
 183         krwlock_t       lg_tx_lock;
 184         uint_t          lg_ntx_ports;
 185         aggr_port_t     **lg_tx_ports;          /* array of tx ports */
 186         uint_t          lg_tx_ports_size;       /* size of lg_tx_ports */
 187         uint32_t        lg_tx_policy;           /* outbound policy */
 188         uint8_t         lg_mac_tx_policy;
 189         uint64_t        lg_ifspeed;
 190         link_state_t    lg_link_state;
 191         link_duplex_t   lg_link_duplex;
 192         uint64_t        lg_stat[MAC_NSTAT];
 193         uint64_t        lg_ether_stat[ETHER_NSTAT];
 194         aggr_lacp_mode_t lg_lacp_mode;          /* off, active, or passive */
 195         Agg_t           aggr;                   /* 802.3ad data */
 196         uint32_t        lg_hcksum_txflags;
 197         uint_t          lg_max_sdu;
 198         uint32_t        lg_margin;
 199         mac_capab_lso_t lg_cap_lso;
 200 
 201         /*
 202          * The following fields are used by the LACP packets processing.
 203          * Specifically, as the LACP packets processing is not performance
 204          * critical, all LACP packets will be handled by a dedicated thread
 205          * instead of in the mac_rx() call. This is to avoid the dead lock
 206          * with mac_unicast_remove(), which holding the mac perimeter of the
 207          * aggr, and wait for the mr_refcnt of the RX ring to drop to zero.
 208          */
 209         kmutex_t        lg_lacp_lock;
 210         kcondvar_t      lg_lacp_cv;
 211         mblk_t          *lg_lacp_head;
 212         mblk_t          *lg_lacp_tail;
 213         kthread_t       *lg_lacp_rx_thread;
 214         boolean_t       lg_lacp_done;
 215 
 216         aggr_pseudo_rx_group_t  lg_rx_group;
 217         aggr_pseudo_tx_group_t  lg_tx_group;
 218 
 219         kmutex_t        lg_tx_flowctl_lock;
 220         kcondvar_t      lg_tx_flowctl_cv;
 221         uint_t          lg_tx_blocked_cnt;
 222         mac_ring_handle_t       *lg_tx_blocked_rings;
 223         kthread_t       *lg_tx_notify_thread;
 224         boolean_t       lg_tx_notify_done;
 225 
 226         /*
 227          * The following fields are used by aggr to wait for all the
 228          * aggr_port_notify_cb() and aggr_port_timer_thread() to finish
 229          * before it calls mac_unregister() when the aggr is deleted.
 230          */
 231         kmutex_t        lg_port_lock;
 232         kcondvar_t      lg_port_cv;
 233         int             lg_port_ref;
 234 } aggr_grp_t;
 235 
 236 #define AGGR_GRP_REFHOLD(grp) {                 \
 237         atomic_add_32(&(grp)->lg_refs, 1);       \
 238         ASSERT((grp)->lg_refs != 0);         \
 239 }
 240 
 241 #define AGGR_GRP_REFRELE(grp) {                                 \
 242         ASSERT((grp)->lg_refs != 0);                         \
 243         membar_exit();                                          \
 244         if (atomic_add_32_nv(&(grp)->lg_refs, -1) == 0)          \
 245                 aggr_grp_free(grp);                             \
 246 }
 247 
 248 #define AGGR_PORT_REFHOLD(port) {               \
 249         atomic_add_32(&(port)->lp_refs, 1);      \
 250         ASSERT((port)->lp_refs != 0);                \
 251 }
 252 
 253 #define AGGR_PORT_REFRELE(port) {                               \
 254         ASSERT((port)->lp_refs != 0);                                \
 255         membar_exit();                                          \
 256         if (atomic_add_32_nv(&(port)->lp_refs, -1) == 0) \
 257                 aggr_port_free(port);                           \
 258 }
 259 
 260 extern dev_info_t *aggr_dip;
 261 extern int aggr_ioc_init(void);
 262 extern void aggr_ioc_fini(void);
 263 
 264 typedef int (*aggr_grp_info_new_grp_fn_t)(void *, datalink_id_t, uint32_t,
 265     uchar_t *, boolean_t, boolean_t, uint32_t, uint32_t, aggr_lacp_mode_t,
 266     aggr_lacp_timer_t);
 267 typedef int (*aggr_grp_info_new_port_fn_t)(void *, datalink_id_t, uchar_t *,
 268     aggr_port_state_t, aggr_lacp_state_t *);
 269 
 270 extern void aggr_grp_init(void);
 271 extern void aggr_grp_fini(void);
 272 extern int aggr_grp_create(datalink_id_t, uint32_t, uint_t, laioc_port_t *,
 273     uint32_t, boolean_t, boolean_t, uchar_t *, aggr_lacp_mode_t,
 274     aggr_lacp_timer_t, cred_t *);
 275 extern int aggr_grp_delete(datalink_id_t, cred_t *);
 276 extern void aggr_grp_free(aggr_grp_t *);
 277 
 278 extern int aggr_grp_info(datalink_id_t, void *, aggr_grp_info_new_grp_fn_t,
 279     aggr_grp_info_new_port_fn_t, cred_t *);
 280 extern void aggr_grp_notify(aggr_grp_t *, uint32_t);
 281 extern boolean_t aggr_grp_attach_port(aggr_grp_t *, aggr_port_t *);
 282 extern boolean_t aggr_grp_detach_port(aggr_grp_t *, aggr_port_t *);
 283 extern void aggr_grp_port_mac_changed(aggr_grp_t *, aggr_port_t *,
 284     boolean_t *, boolean_t *);
 285 extern int aggr_grp_add_ports(datalink_id_t, uint_t, boolean_t,
 286     laioc_port_t *);
 287 extern int aggr_grp_rem_ports(datalink_id_t, uint_t, laioc_port_t *);
 288 extern boolean_t aggr_grp_update_ports_mac(aggr_grp_t *);
 289 extern int aggr_grp_modify(datalink_id_t, uint8_t, uint32_t, boolean_t,
 290     const uchar_t *, aggr_lacp_mode_t, aggr_lacp_timer_t);
 291 extern void aggr_grp_multicst_port(aggr_port_t *, boolean_t);
 292 extern uint_t aggr_grp_count(void);
 293 
 294 extern void aggr_port_init(void);
 295 extern void aggr_port_fini(void);
 296 extern int aggr_port_create(aggr_grp_t *, const datalink_id_t, boolean_t,
 297     aggr_port_t **);
 298 extern void aggr_port_delete(aggr_port_t *);
 299 extern void aggr_port_free(aggr_port_t *);
 300 extern int aggr_port_start(aggr_port_t *);
 301 extern void aggr_port_stop(aggr_port_t *);
 302 extern int aggr_port_promisc(aggr_port_t *, boolean_t);
 303 extern int aggr_port_unicst(aggr_port_t *);
 304 extern int aggr_port_multicst(void *, boolean_t, const uint8_t *);
 305 extern uint64_t aggr_port_stat(aggr_port_t *, uint_t);
 306 extern boolean_t aggr_port_notify_link(aggr_grp_t *, aggr_port_t *);
 307 extern void aggr_port_init_callbacks(aggr_port_t *);
 308 
 309 extern void aggr_recv_cb(void *, mac_resource_handle_t, mblk_t *, boolean_t);
 310 
 311 extern void aggr_tx_ring_update(void *, uintptr_t);
 312 extern void aggr_tx_notify_thread(void *);
 313 extern void aggr_send_port_enable(aggr_port_t *);
 314 extern void aggr_send_port_disable(aggr_port_t *);
 315 extern void aggr_send_update_policy(aggr_grp_t *, uint32_t);
 316 
 317 extern void aggr_lacp_init(void);
 318 extern void aggr_lacp_fini(void);
 319 extern void aggr_lacp_init_port(aggr_port_t *);
 320 extern void aggr_lacp_init_grp(aggr_grp_t *);
 321 extern void aggr_lacp_set_mode(aggr_grp_t *, aggr_lacp_mode_t,
 322     aggr_lacp_timer_t);
 323 extern void aggr_lacp_update_mode(aggr_grp_t *, aggr_lacp_mode_t);
 324 extern void aggr_lacp_update_timer(aggr_grp_t *, aggr_lacp_timer_t);
 325 extern void aggr_lacp_rx_enqueue(aggr_port_t *, mblk_t *);
 326 extern void aggr_lacp_port_attached(aggr_port_t *);
 327 extern void aggr_lacp_port_detached(aggr_port_t *);
 328 extern void aggr_port_lacp_set_mode(aggr_grp_t *, aggr_port_t *);
 329 
 330 extern void aggr_lacp_rx_thread(void *);
 331 extern void aggr_recv_lacp(aggr_port_t *, mac_resource_handle_t, mblk_t *);
 332 
 333 extern void aggr_grp_port_hold(aggr_port_t *);
 334 extern void aggr_grp_port_rele(aggr_port_t *);
 335 extern void aggr_grp_port_wait(aggr_grp_t *);
 336 
 337 extern int aggr_port_addmac(aggr_port_t *, const uint8_t *);
 338 extern void aggr_port_remmac(aggr_port_t *, const uint8_t *);
 339 
 340 extern mblk_t *aggr_ring_tx(void *, mblk_t *);
 341 extern mblk_t *aggr_find_tx_ring(void *, mblk_t *,
 342     uintptr_t, mac_ring_handle_t *);
 343 
 344 #endif  /* _KERNEL */
 345 
 346 #ifdef  __cplusplus
 347 }
 348 #endif
 349 
 350 #endif  /* _SYS_AGGR_IMPL_H */
--- EOF ---