drivers/s390/net/qeth_core.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *    Copyright IBM Corp. 2007
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #ifndef __QETH_CORE_H__
  11 #define __QETH_CORE_H__
  12
  13 #include <linux/completion.h>
  14 #include <linux/debugfs.h>
  15 #include <linux/if.h>
  16 #include <linux/if_arp.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/ctype.h>
  20 #include <linux/in6.h>
  21 #include <linux/bitops.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/hashtable.h>
  24 #include <linux/ip.h>
  25 #include <linux/rcupdate.h>
  26 #include <linux/refcount.h>
  27 #include <linux/timer.h>
  28 #include <linux/types.h>
  29 #include <linux/wait.h>
  30 #include <linux/workqueue.h>
  31
  32 #include <net/dst.h>
  33 #include <net/ip6_fib.h>
  34 #include <net/ipv6.h>
  35 #include <net/if_inet6.h>
  36 #include <net/addrconf.h>
  37 #include <net/route.h>
  38 #include <net/sch_generic.h>
  39 #include <net/tcp.h>
  40
  41 #include <asm/debug.h>
  42 #include <asm/qdio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/ccwgroup.h>
  45 #include <asm/sysinfo.h>
  46
  47 #include <uapi/linux/if_link.h>
  48
  49 #include "qeth_core_mpc.h"
  50
  51 /**
  52  * Debug Facility stuff
  53  */
  54 enum qeth_dbf_names {
  55         QETH_DBF_SETUP,
  56         QETH_DBF_MSG,
  57         QETH_DBF_CTRL,
  58         QETH_DBF_INFOS  /* must be last element */
  59 };
  60
  61 struct qeth_dbf_info {
  62         char name[DEBUG_MAX_NAME_LEN];
  63         int pages;
  64         int areas;
  65         int len;
  66         int level;
  67         struct debug_view *view;
  68         debug_info_t *id;
  69 };
  70
  71 #define QETH_DBF_CTRL_LEN 256U
  72
  73 #define QETH_DBF_TEXT(name, level, text) \
  74         debug_text_event(qeth_dbf[QETH_DBF_##name].id, level, text)
  75
  76 #define QETH_DBF_HEX(name, level, addr, len) \
  77         debug_event(qeth_dbf[QETH_DBF_##name].id, level, (void *)(addr), len)
  78
  79 #define QETH_DBF_MESSAGE(level, text...) \
  80         debug_sprintf_event(qeth_dbf[QETH_DBF_MSG].id, level, text)
  81
  82 #define QETH_DBF_TEXT_(name, level, text...) \
  83         qeth_dbf_longtext(qeth_dbf[QETH_DBF_##name].id, level, text)
  84
  85 #define QETH_CARD_TEXT(card, level, text) \
  86         debug_text_event(card->debug, level, text)
  87
  88 #define QETH_CARD_HEX(card, level, addr, len) \
  89         debug_event(card->debug, level, (void *)(addr), len)
  90
  91 #define QETH_CARD_MESSAGE(card, text...) \
  92         debug_sprintf_event(card->debug, level, text)
  93
  94 #define QETH_CARD_TEXT_(card, level, text...) \
  95         qeth_dbf_longtext(card->debug, level, text)
  96
  97 #define SENSE_COMMAND_REJECT_BYTE 0
  98 #define SENSE_COMMAND_REJECT_FLAG 0x80
  99 #define SENSE_RESETTING_EVENT_BYTE 1
 100 #define SENSE_RESETTING_EVENT_FLAG 0x80
 101
 102 static inline u32 qeth_get_device_id(struct ccw_device *cdev)
 103 {
 104         struct ccw_dev_id dev_id;
 105         u32 id;
 106
 107         ccw_device_get_id(cdev, &dev_id);
 108         id = dev_id.devno;
 109         id |= (u32) (dev_id.ssid << 16);
 110
 111         return id;
 112 }
 113
 114 /*
 115  * Common IO related definitions
 116  */
 117 #define CARD_RDEV(card) card->read.ccwdev
 118 #define CARD_WDEV(card) card->write.ccwdev
 119 #define CARD_DDEV(card) card->data.ccwdev
 120 #define CARD_BUS_ID(card) dev_name(&card->gdev->dev)
 121 #define CARD_RDEV_ID(card) dev_name(&card->read.ccwdev->dev)
 122 #define CARD_WDEV_ID(card) dev_name(&card->write.ccwdev->dev)
 123 #define CARD_DDEV_ID(card) dev_name(&card->data.ccwdev->dev)
 124 #define CCW_DEVID(cdev)         (qeth_get_device_id(cdev))
 125 #define CARD_DEVID(card)        (CCW_DEVID(CARD_RDEV(card)))
 126
 127 /* Routing stuff */
 128 struct qeth_routing_info {
 129         enum qeth_routing_types type;
 130 };
 131
 132 /* SETBRIDGEPORT stuff */
 133 enum qeth_sbp_roles {
 134         QETH_SBP_ROLE_NONE      = 0,
 135         QETH_SBP_ROLE_PRIMARY   = 1,
 136         QETH_SBP_ROLE_SECONDARY = 2,
 137 };
 138
 139 enum qeth_sbp_states {
 140         QETH_SBP_STATE_INACTIVE = 0,
 141         QETH_SBP_STATE_STANDBY  = 1,
 142         QETH_SBP_STATE_ACTIVE   = 2,
 143 };
 144
 145 #define QETH_SBP_HOST_NOTIFICATION 1
 146
 147 struct qeth_sbp_info {
 148         __u32 supported_funcs;
 149         enum qeth_sbp_roles role;
 150         __u32 hostnotification:1;
 151         __u32 reflect_promisc:1;
 152         __u32 reflect_promisc_primary:1;
 153 };
 154
 155 struct qeth_vnicc_info {
 156         /* supported/currently configured VNICCs; updated in IPA exchanges */
 157         u32 sup_chars;
 158         u32 cur_chars;
 159         /* supported commands: bitmasks which VNICCs support respective cmd */
 160         u32 set_char_sup;
 161         u32 getset_timeout_sup;
 162         /* timeout value for the learning characteristic */
 163         u32 learning_timeout;
 164         /* characteristics wanted/configured by user */
 165         u32 wanted_chars;
 166         /* has user explicitly enabled rx_bcast while online? */
 167         bool rx_bcast_enabled;
 168 };
 169
 170 #define QETH_IDX_FUNC_LEVEL_OSD          0x0101
 171 #define QETH_IDX_FUNC_LEVEL_IQD          0x4108
 172
 173 #define QETH_BUFSIZE            4096
 174 #define CCW_CMD_WRITE           0x01
 175 #define CCW_CMD_READ            0x02
 176
 177 /**
 178  * some more defs
 179  */
 180 #define QETH_TX_TIMEOUT         (100 * HZ)
 181 #define QETH_RCD_TIMEOUT        (60 * HZ)
 182 #define QETH_RECLAIM_WORK_TIME  HZ
 183 #define QETH_MAX_PORTNO         15
 184
 185 /*****************************************************************************/
 186 /* QDIO queue and buffer handling                                            */
 187 /*****************************************************************************/
 188 #define QETH_MAX_OUT_QUEUES     4
 189 #define QETH_IQD_MIN_TXQ        2       /* One for ucast, one for mcast. */
 190 #define QETH_IQD_MCAST_TXQ      0
 191 #define QETH_IQD_MIN_UCAST_TXQ  1
 192
 193 #define QETH_MAX_IN_QUEUES      2
 194 #define QETH_RX_COPYBREAK      (PAGE_SIZE >> 1)
 195 #define QETH_IN_BUF_SIZE_DEFAULT 65536
 196 #define QETH_IN_BUF_COUNT_DEFAULT 64
 197 #define QETH_IN_BUF_COUNT_HSDEFAULT 128
 198 #define QETH_IN_BUF_COUNT_MIN   8U
 199 #define QETH_IN_BUF_COUNT_MAX   128U
 200 #define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12)
 201 #define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \
 202                  ((card)->qdio.in_buf_pool.buf_count / 2)
 203
 204 /* buffers we have to be behind before we get a PCI */
 205 #define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1)
 206 /*enqueued free buffers left before we get a PCI*/
 207 #define QETH_PCI_THRESHOLD_B(card) 0
 208 /*not used unless the microcode gets patched*/
 209 #define QETH_PCI_TIMER_VALUE(card) 3
 210
 211 /* priority queing */
 212 #define QETH_PRIOQ_DEFAULT QETH_NO_PRIO_QUEUEING
 213 #define QETH_DEFAULT_QUEUE    2
 214 #define QETH_NO_PRIO_QUEUEING 0
 215 #define QETH_PRIO_Q_ING_PREC  1
 216 #define QETH_PRIO_Q_ING_TOS   2
 217 #define QETH_PRIO_Q_ING_SKB   3
 218 #define QETH_PRIO_Q_ING_VLAN  4
 219 #define QETH_PRIO_Q_ING_FIXED 5
 220
 221 /* Packing */
 222 #define QETH_LOW_WATERMARK_PACK  2
 223 #define QETH_HIGH_WATERMARK_PACK 5
 224 #define QETH_WATERMARK_PACK_FUZZ 1
 225
 226 struct qeth_hdr_layer3 {
 227         __u8  id;
 228         __u8  flags;
 229         __u16 inbound_checksum; /*TSO:__u16 seqno */
 230         __u32 token;            /*TSO: __u32 reserved */
 231         __u16 length;
 232         __u8  vlan_prio;
 233         __u8  ext_flags;
 234         __u16 vlan_id;
 235         __u16 frame_offset;
 236         union {
 237                 /* TX: */
 238                 struct in6_addr addr;
 239                 /* RX: */
 240                 struct rx {
 241                         u8 res1[2];
 242                         u8 src_mac[6];
 243                         u8 res2[4];
 244                         u16 vlan_id;
 245                         u8 res3[2];
 246                 } rx;
 247         } next_hop;
 248 };
 249
 250 struct qeth_hdr_layer2 {
 251         __u8 id;
 252         __u8 flags[3];
 253         __u8 port_no;
 254         __u8 hdr_length;
 255         __u16 pkt_length;
 256         __u16 seq_no;
 257         __u16 vlan_id;
 258         __u32 reserved;
 259         __u8 reserved2[16];
 260 } __attribute__ ((packed));
 261
 262 struct qeth_hdr {
 263         union {
 264                 struct qeth_hdr_layer2 l2;
 265                 struct qeth_hdr_layer3 l3;
 266         } hdr;
 267 } __attribute__ ((packed));
 268
 269 #define QETH_QIB_PQUE_ORDER_RR          0
 270 #define QETH_QIB_PQUE_UNITS_SBAL        2
 271 #define QETH_QIB_PQUE_PRIO_DEFAULT      4
 272
 273 struct qeth_qib_parms {
 274         char pcit_magic[4];
 275         u32 pcit_a;
 276         u32 pcit_b;
 277         u32 pcit_c;
 278         char blkt_magic[4];
 279         u32 blkt_total;
 280         u32 blkt_inter_packet;
 281         u32 blkt_inter_packet_jumbo;
 282         char pque_magic[4];
 283         u8 pque_order;
 284         u8 pque_units;
 285         u16 reserved;
 286         u32 pque_priority[4];
 287 };
 288
 289 /*TCP Segmentation Offload header*/
 290 struct qeth_hdr_ext_tso {
 291         __u16 hdr_tot_len;
 292         __u8  imb_hdr_no;
 293         __u8  reserved;
 294         __u8  hdr_type;
 295         __u8  hdr_version;
 296         __u16 hdr_len;
 297         __u32 payload_len;
 298         __u16 mss;
 299         __u16 dg_hdr_len;
 300         __u8  padding[16];
 301 } __attribute__ ((packed));
 302
 303 struct qeth_hdr_tso {
 304         struct qeth_hdr hdr;    /*hdr->hdr.l3.xxx*/
 305         struct qeth_hdr_ext_tso ext;
 306 } __attribute__ ((packed));
 307
 308
 309 /* flags for qeth_hdr.flags */
 310 #define QETH_HDR_PASSTHRU 0x10
 311 #define QETH_HDR_IPV6     0x80
 312 #define QETH_HDR_CAST_MASK 0x07
 313 enum qeth_cast_flags {
 314         QETH_CAST_UNICAST   = 0x06,
 315         QETH_CAST_MULTICAST = 0x04,
 316         QETH_CAST_BROADCAST = 0x05,
 317         QETH_CAST_ANYCAST   = 0x07,
 318         QETH_CAST_NOCAST    = 0x00,
 319 };
 320
 321 enum qeth_layer2_frame_flags {
 322         QETH_LAYER2_FLAG_MULTICAST = 0x01,
 323         QETH_LAYER2_FLAG_BROADCAST = 0x02,
 324         QETH_LAYER2_FLAG_UNICAST   = 0x04,
 325         QETH_LAYER2_FLAG_VLAN      = 0x10,
 326 };
 327
 328 enum qeth_header_ids {
 329         QETH_HEADER_TYPE_LAYER3 = 0x01,
 330         QETH_HEADER_TYPE_LAYER2 = 0x02,
 331         QETH_HEADER_TYPE_L3_TSO = 0x03,
 332         QETH_HEADER_TYPE_L2_TSO = 0x06,
 333         QETH_HEADER_MASK_INVAL  = 0x80,
 334 };
 335 /* flags for qeth_hdr.ext_flags */
 336 #define QETH_HDR_EXT_VLAN_FRAME       0x01
 337 #define QETH_HDR_EXT_TOKEN_ID         0x02
 338 #define QETH_HDR_EXT_INCLUDE_VLAN_TAG 0x04
 339 #define QETH_HDR_EXT_SRC_MAC_ADDR     0x08
 340 #define QETH_HDR_EXT_CSUM_HDR_REQ     0x10
 341 #define QETH_HDR_EXT_CSUM_TRANSP_REQ  0x20
 342 #define QETH_HDR_EXT_UDP              0x40 /*bit off for TCP*/
 343
 344 static inline bool qeth_l2_same_vlan(struct qeth_hdr_layer2 *h1,
 345                                      struct qeth_hdr_layer2 *h2)
 346 {
 347         return !((h1->flags[2] ^ h2->flags[2]) & QETH_LAYER2_FLAG_VLAN) &&
 348                h1->vlan_id == h2->vlan_id;
 349 }
 350
 351 static inline bool qeth_l3_iqd_same_vlan(struct qeth_hdr_layer3 *h1,
 352                                          struct qeth_hdr_layer3 *h2)
 353 {
 354         return !((h1->ext_flags ^ h2->ext_flags) & QETH_HDR_EXT_VLAN_FRAME) &&
 355                h1->vlan_id == h2->vlan_id;
 356 }
 357
 358 static inline bool qeth_l3_same_next_hop(struct qeth_hdr_layer3 *h1,
 359                                          struct qeth_hdr_layer3 *h2)
 360 {
 361         return !((h1->flags ^ h2->flags) & QETH_HDR_IPV6) &&
 362                ipv6_addr_equal(&h1->next_hop.addr, &h2->next_hop.addr);
 363 }
 364
 365 struct qeth_local_addr {
 366         struct hlist_node hnode;
 367         struct rcu_head rcu;
 368         struct in6_addr addr;
 369 };
 370
 371 enum qeth_qdio_info_states {
 372         QETH_QDIO_UNINITIALIZED,
 373         QETH_QDIO_ALLOCATED,
 374         QETH_QDIO_ESTABLISHED,
 375         QETH_QDIO_CLEANING
 376 };
 377
 378 struct qeth_buffer_pool_entry {
 379         struct list_head list;
 380         struct list_head init_list;
 381         struct page *elements[QDIO_MAX_ELEMENTS_PER_BUFFER];
 382 };
 383
 384 struct qeth_qdio_buffer_pool {
 385         struct list_head entry_list;
 386         int buf_count;
 387 };
 388
 389 struct qeth_qdio_buffer {
 390         struct qdio_buffer *buffer;
 391         /* the buffer pool entry currently associated to this buffer */
 392         struct qeth_buffer_pool_entry *pool_entry;
 393         struct sk_buff *rx_skb;
 394 };
 395
 396 struct qeth_qdio_q {
 397         struct qdio_buffer *qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
 398         struct qeth_qdio_buffer bufs[QDIO_MAX_BUFFERS_PER_Q];
 399         int next_buf_to_init;
 400 };
 401
 402 enum qeth_qdio_out_buffer_state {
 403         /* Owned by driver, in order to be filled. */
 404         QETH_QDIO_BUF_EMPTY,
 405         /* Filled by driver; owned by hardware in order to be sent. */
 406         QETH_QDIO_BUF_PRIMED,
 407 };
 408
 409 enum qeth_qaob_state {
 410         QETH_QAOB_ISSUED,
 411         QETH_QAOB_PENDING,
 412         QETH_QAOB_DONE,
 413 };
 414
 415 struct qeth_qaob_priv1 {
 416         unsigned int state;
 417         u8 queue_no;
 418 };
 419
 420 struct qeth_qdio_out_buffer {
 421         struct qdio_buffer *buffer;
 422         atomic_t state;
 423         int next_element_to_fill;
 424         unsigned int frames;
 425         unsigned int bytes;
 426         struct sk_buff_head skb_list;
 427         DECLARE_BITMAP(from_kmem_cache, QDIO_MAX_ELEMENTS_PER_BUFFER);
 428
 429         struct list_head list_entry;
 430         struct qaob *aob;
 431 };
 432
 433 struct qeth_card;
 434
 435 #define QETH_CARD_STAT_ADD(_c, _stat, _val)     ((_c)->stats._stat += (_val))
 436 #define QETH_CARD_STAT_INC(_c, _stat)           QETH_CARD_STAT_ADD(_c, _stat, 1)
 437
 438 #define QETH_TXQ_STAT_ADD(_q, _stat, _val)      ((_q)->stats._stat += (_val))
 439 #define QETH_TXQ_STAT_INC(_q, _stat)            QETH_TXQ_STAT_ADD(_q, _stat, 1)
 440
 441 struct qeth_card_stats {
 442         u64 rx_bufs;
 443         u64 rx_skb_csum;
 444         u64 rx_sg_skbs;
 445         u64 rx_sg_frags;
 446         u64 rx_sg_alloc_page;
 447
 448         u64 rx_dropped_nomem;
 449         u64 rx_dropped_notsupp;
 450         u64 rx_dropped_runt;
 451
 452         /* rtnl_link_stats64 */
 453         u64 rx_packets;
 454         u64 rx_bytes;
 455         u64 rx_multicast;
 456         u64 rx_length_errors;
 457         u64 rx_frame_errors;
 458         u64 rx_fifo_errors;
 459 };
 460
 461 struct qeth_out_q_stats {
 462         u64 bufs;
 463         u64 bufs_pack;
 464         u64 buf_elements;
 465         u64 skbs_pack;
 466         u64 skbs_sg;
 467         u64 skbs_csum;
 468         u64 skbs_tso;
 469         u64 skbs_linearized;
 470         u64 skbs_linearized_fail;
 471         u64 tso_bytes;
 472         u64 packing_mode_switch;
 473         u64 stopped;
 474         u64 doorbell;
 475         u64 coal_frames;
 476         u64 completion_irq;
 477         u64 completion_yield;
 478         u64 completion_timer;
 479
 480         /* rtnl_link_stats64 */
 481         u64 tx_packets;
 482         u64 tx_bytes;
 483         u64 tx_errors;
 484         u64 tx_dropped;
 485 };
 486
 487 #define QETH_TX_MAX_COALESCED_FRAMES    1
 488 #define QETH_TX_COALESCE_USECS          25
 489 #define QETH_TX_TIMER_USECS             500
 490
 491 struct qeth_qdio_out_q {
 492         struct qdio_buffer *qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
 493         struct qeth_qdio_out_buffer *bufs[QDIO_MAX_BUFFERS_PER_Q];
 494         struct list_head pending_bufs;
 495         struct qeth_out_q_stats stats;
 496         spinlock_t lock;
 497         unsigned int priority;
 498         u8 next_buf_to_fill;
 499         u8 max_elements;
 500         u8 queue_no;
 501         u8 do_pack;
 502         struct qeth_card *card;
 503         /*
 504          * number of buffers that are currently filled (PRIMED)
 505          * -> these buffers are hardware-owned
 506          */
 507         atomic_t used_buffers;
 508         /* indicates whether PCI flag must be set (or if one is outstanding) */
 509         atomic_t set_pci_flags_count;
 510         struct napi_struct napi;
 511         struct timer_list timer;
 512         struct qeth_hdr *prev_hdr;
 513         unsigned int coalesced_frames;
 514         u8 bulk_start;
 515         u8 bulk_count;
 516         u8 bulk_max;
 517
 518         unsigned int coalesce_usecs;
 519         unsigned int max_coalesced_frames;
 520         unsigned int rescan_usecs;
 521 };
 522
 523 #define qeth_for_each_output_queue(card, q, i)          \
 524         for (i = 0; i < card->qdio.no_out_queues &&     \
 525                     (q = card->qdio.out_qs[i]); i++)
 526
 527 #define qeth_napi_to_out_queue(n) container_of(n, struct qeth_qdio_out_q, napi)
 528
 529 static inline void qeth_tx_arm_timer(struct qeth_qdio_out_q *queue,
 530                                      unsigned long usecs)
 531 {
 532         timer_reduce(&queue->timer, usecs_to_jiffies(usecs) + jiffies);
 533 }
 534
 535 static inline bool qeth_out_queue_is_full(struct qeth_qdio_out_q *queue)
 536 {
 537         return atomic_read(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q;
 538 }
 539
 540 static inline bool qeth_out_queue_is_empty(struct qeth_qdio_out_q *queue)
 541 {
 542         return atomic_read(&queue->used_buffers) == 0;
 543 }
 544
 545 struct qeth_qdio_info {
 546         atomic_t state;
 547         /* input */
 548         struct qeth_qdio_q *in_q;
 549         struct qeth_qdio_q *c_q;
 550         struct qeth_qdio_buffer_pool in_buf_pool;
 551         struct qeth_qdio_buffer_pool init_pool;
 552         int in_buf_size;
 553
 554         /* output */
 555         unsigned int no_out_queues;
 556         struct qeth_qdio_out_q *out_qs[QETH_MAX_OUT_QUEUES];
 557
 558         /* priority queueing */
 559         int do_prio_queueing;
 560         int default_out_queue;
 561 };
 562
 563 /**
 564  *  channel state machine
 565  */
 566 enum qeth_channel_states {
 567         CH_STATE_UP,
 568         CH_STATE_DOWN,
 569         CH_STATE_HALTED,
 570         CH_STATE_STOPPED,
 571 };
 572 /**
 573  * card state machine
 574  */
 575 enum qeth_card_states {
 576         CARD_STATE_DOWN,
 577         CARD_STATE_SOFTSETUP,
 578 };
 579
 580 /**
 581  * Protocol versions
 582  */
 583 enum qeth_prot_versions {
 584         QETH_PROT_NONE = 0x0000,
 585         QETH_PROT_IPV4 = 0x0004,
 586         QETH_PROT_IPV6 = 0x0006,
 587 };
 588
 589 enum qeth_cq {
 590         QETH_CQ_DISABLED = 0,
 591         QETH_CQ_ENABLED = 1,
 592         QETH_CQ_NOTAVAILABLE = 2,
 593 };
 594
 595 struct qeth_ipato {
 596         bool enabled;
 597         bool invert4;
 598         bool invert6;
 599         struct list_head entries;
 600 };
 601
 602 struct qeth_channel {
 603         struct ccw_device *ccwdev;
 604         struct qeth_cmd_buffer *active_cmd;
 605         enum qeth_channel_states state;
 606 };
 607
 608 struct qeth_reply {
 609         int (*callback)(struct qeth_card *card, struct qeth_reply *reply,
 610                         unsigned long data);
 611         void *param;
 612 };
 613
 614 struct qeth_cmd_buffer {
 615         struct list_head list_entry;
 616         struct completion done;
 617         spinlock_t lock;
 618         unsigned int length;
 619         refcount_t ref_count;
 620         struct qeth_channel *channel;
 621         struct qeth_reply reply;
 622         long timeout;
 623         unsigned char *data;
 624         void (*finalize)(struct qeth_card *card, struct qeth_cmd_buffer *iob);
 625         bool (*match)(struct qeth_cmd_buffer *iob,
 626                       struct qeth_cmd_buffer *reply);
 627         void (*callback)(struct qeth_card *card, struct qeth_cmd_buffer *iob,
 628                          unsigned int data_length);
 629         int rc;
 630 };
 631
 632 static inline void qeth_get_cmd(struct qeth_cmd_buffer *iob)
 633 {
 634         refcount_inc(&iob->ref_count);
 635 }
 636
 637 static inline struct qeth_ipa_cmd *__ipa_reply(struct qeth_cmd_buffer *iob)
 638 {
 639         if (!IS_IPA(iob->data))
 640                 return NULL;
 641
 642         return (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 643 }
 644
 645 static inline struct qeth_ipa_cmd *__ipa_cmd(struct qeth_cmd_buffer *iob)
 646 {
 647         return (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
 648 }
 649
 650 static inline struct ccw1 *__ccw_from_cmd(struct qeth_cmd_buffer *iob)
 651 {
 652         return (struct ccw1 *)(iob->data + ALIGN(iob->length, 8));
 653 }
 654
 655 /**
 656  *  OSA card related definitions
 657  */
 658 struct qeth_token {
 659         __u32 issuer_rm_w;
 660         __u32 issuer_rm_r;
 661         __u32 cm_filter_w;
 662         __u32 cm_filter_r;
 663         __u32 cm_connection_w;
 664         __u32 cm_connection_r;
 665         __u32 ulp_filter_w;
 666         __u32 ulp_filter_r;
 667         __u32 ulp_connection_w;
 668         __u32 ulp_connection_r;
 669 };
 670
 671 struct qeth_seqno {
 672         __u32 trans_hdr;
 673         __u32 pdu_hdr;
 674         __u32 pdu_hdr_ack;
 675         __u16 ipa;
 676 };
 677
 678 struct qeth_card_blkt {
 679         int time_total;
 680         int inter_packet;
 681         int inter_packet_jumbo;
 682 };
 683
 684 enum qeth_pnso_mode {
 685         QETH_PNSO_NONE,
 686         QETH_PNSO_BRIDGEPORT,
 687         QETH_PNSO_ADDR_INFO,
 688 };
 689
 690 enum qeth_link_mode {
 691         QETH_LINK_MODE_UNKNOWN,
 692         QETH_LINK_MODE_FIBRE_SHORT,
 693         QETH_LINK_MODE_FIBRE_LONG,
 694 };
 695
 696 struct qeth_link_info {
 697         u32 speed;
 698         u8 duplex;
 699         u8 port;
 700         enum qeth_link_mode link_mode;
 701 };
 702
 703 #define QETH_BROADCAST_WITH_ECHO    0x01
 704 #define QETH_BROADCAST_WITHOUT_ECHO 0x02
 705 struct qeth_card_info {
 706         unsigned short unit_addr2;
 707         unsigned short cula;
 708         __u16 func_level;
 709         char mcl_level[QETH_MCL_LENGTH + 1];
 710         /* doubleword below corresponds to net_if_token */
 711         u16 ddev_devno;
 712         u8 cssid;
 713         u8 iid;
 714         u8 ssid;
 715         u8 chpid;
 716         u16 chid;
 717         u8 ids_valid:1; /* cssid,iid,chid */
 718         u8 dev_addr_is_registered:1;
 719         u8 open_when_online:1;
 720         u8 promisc_mode:1;
 721         u8 use_v1_blkt:1;
 722         u8 is_vm_nic:1;
 723         /* no bitfield, we take a pointer on these two: */
 724         u8 has_lp2lp_cso_v6;
 725         u8 has_lp2lp_cso_v4;
 726         enum qeth_pnso_mode pnso_mode;
 727         enum qeth_card_types type;
 728         enum qeth_link_types link_type;
 729         int broadcast_capable;
 730         bool layer_enforced;
 731         struct qeth_card_blkt blkt;
 732         __u32 diagass_support;
 733         __u32 hwtrap;
 734         struct qeth_link_info link_info;
 735 };
 736
 737 enum qeth_discipline_id {
 738         QETH_DISCIPLINE_UNDETERMINED = -1,
 739         QETH_DISCIPLINE_LAYER3 = 0,
 740         QETH_DISCIPLINE_LAYER2 = 1,
 741 };
 742
 743 struct qeth_card_options {
 744         struct qeth_ipa_caps ipa4;
 745         struct qeth_ipa_caps ipa6;
 746         struct qeth_routing_info route4;
 747         struct qeth_routing_info route6;
 748         struct qeth_ipa_caps adp; /* Adapter parameters */
 749         struct qeth_sbp_info sbp; /* SETBRIDGEPORT options */
 750         struct qeth_vnicc_info vnicc; /* VNICC options */
 751         enum qeth_discipline_id layer;
 752         enum qeth_ipa_isolation_modes isolation;
 753         int sniffer;
 754         enum qeth_cq cq;
 755         char hsuid[9];
 756 };
 757
 758 #define IS_LAYER2(card) ((card)->options.layer == QETH_DISCIPLINE_LAYER2)
 759 #define IS_LAYER3(card) ((card)->options.layer == QETH_DISCIPLINE_LAYER3)
 760
 761 /*
 762  * thread bits for qeth_card thread masks
 763  */
 764 enum qeth_threads {
 765         QETH_RECOVER_THREAD = 1,
 766 };
 767
 768 struct qeth_discipline {
 769         int (*setup) (struct ccwgroup_device *);
 770         void (*remove) (struct ccwgroup_device *);
 771         int (*set_online)(struct qeth_card *card, bool carrier_ok);
 772         void (*set_offline)(struct qeth_card *card);
 773         int (*control_event_handler)(struct qeth_card *card,
 774                                         struct qeth_ipa_cmd *cmd);
 775 };
 776
 777 enum qeth_addr_disposition {
 778         QETH_DISP_ADDR_DELETE = 0,
 779         QETH_DISP_ADDR_DO_NOTHING = 1,
 780         QETH_DISP_ADDR_ADD = 2,
 781 };
 782
 783 struct qeth_rx {
 784         int b_count;
 785         int b_index;
 786         u8 buf_element;
 787         int e_offset;
 788         int qdio_err;
 789         u8 bufs_refill;
 790 };
 791
 792 struct qeth_switch_info {
 793         __u32 capabilities;
 794         __u32 settings;
 795 };
 796
 797 struct qeth_priv {
 798         unsigned int rx_copybreak;
 799         unsigned int tx_wanted_queues;
 800         u32 brport_hw_features;
 801         u32 brport_features;
 802 };
 803
 804 #define QETH_NAPI_WEIGHT NAPI_POLL_WEIGHT
 805
 806 struct qeth_card {
 807         enum qeth_card_states state;
 808         spinlock_t lock;
 809         struct ccwgroup_device *gdev;
 810         struct qeth_cmd_buffer *read_cmd;
 811         struct qeth_channel read;
 812         struct qeth_channel write;
 813         struct qeth_channel data;
 814
 815         struct net_device *dev;
 816         struct dentry *debugfs;
 817         struct qeth_card_stats stats;
 818         struct qeth_card_info info;
 819         struct qeth_token token;
 820         struct qeth_seqno seqno;
 821         struct qeth_card_options options;
 822
 823         struct workqueue_struct *event_wq;
 824         struct workqueue_struct *cmd_wq;
 825         wait_queue_head_t wait_q;
 826
 827         struct mutex ip_lock;
 828         /* protected by ip_lock: */
 829         DECLARE_HASHTABLE(ip_htable, 4);
 830         struct qeth_ipato ipato;
 831
 832         DECLARE_HASHTABLE(local_addrs4, 4);
 833         DECLARE_HASHTABLE(local_addrs6, 4);
 834         spinlock_t local_addrs4_lock;
 835         spinlock_t local_addrs6_lock;
 836         DECLARE_HASHTABLE(rx_mode_addrs, 4);
 837         struct work_struct rx_mode_work;
 838         struct work_struct kernel_thread_starter;
 839         spinlock_t thread_mask_lock;
 840         unsigned long thread_start_mask;
 841         unsigned long thread_allowed_mask;
 842         unsigned long thread_running_mask;
 843         struct list_head cmd_waiter_list;
 844         /* QDIO buffer handling */
 845         struct qeth_qdio_info qdio;
 846         int read_or_write_problem;
 847         const struct qeth_discipline *discipline;
 848         atomic_t force_alloc_skb;
 849         struct service_level qeth_service_level;
 850         struct qdio_ssqd_desc ssqd;
 851         debug_info_t *debug;
 852         struct mutex sbp_lock;
 853         struct mutex conf_mutex;
 854         struct mutex discipline_mutex;
 855         struct napi_struct napi;
 856         struct qeth_rx rx;
 857         struct delayed_work buffer_reclaim_work;
 858 };
 859
 860 static inline bool qeth_card_hw_is_reachable(struct qeth_card *card)
 861 {
 862         return card->state == CARD_STATE_SOFTSETUP;
 863 }
 864
 865 static inline bool qeth_use_tx_irqs(struct qeth_card *card)
 866 {
 867         return !IS_IQD(card);
 868 }
 869
 870 static inline void qeth_unlock_channel(struct qeth_card *card,
 871                                        struct qeth_channel *channel)
 872 {
 873         xchg(&channel->active_cmd, NULL);
 874         wake_up(&card->wait_q);
 875 }
 876
 877 static inline bool qeth_trylock_channel(struct qeth_channel *channel,
 878                                         struct qeth_cmd_buffer *cmd)
 879 {
 880         return cmpxchg(&channel->active_cmd, NULL, cmd) == NULL;
 881 }
 882
 883 struct qeth_trap_id {
 884         __u16 lparnr;
 885         char vmname[8];
 886         __u8 chpid;
 887         __u8 ssid;
 888         __u16 devno;
 889 } __packed;
 890
 891 static inline bool qeth_uses_tx_prio_queueing(struct qeth_card *card)
 892 {
 893         return card->qdio.do_prio_queueing != QETH_NO_PRIO_QUEUEING;
 894 }
 895
 896 static inline unsigned int qeth_tx_actual_queues(struct qeth_card *card)
 897 {
 898         struct qeth_priv *priv = netdev_priv(card->dev);
 899
 900         if (qeth_uses_tx_prio_queueing(card))
 901                 return min(card->dev->num_tx_queues, card->qdio.no_out_queues);
 902
 903         return min(priv->tx_wanted_queues, card->qdio.no_out_queues);
 904 }
 905
 906 static inline u16 qeth_iqd_translate_txq(struct net_device *dev, u16 txq)
 907 {
 908         if (txq == QETH_IQD_MCAST_TXQ)
 909                 return dev->num_tx_queues - 1;
 910         if (txq == dev->num_tx_queues - 1)
 911                 return QETH_IQD_MCAST_TXQ;
 912         return txq;
 913 }
 914
 915 static inline bool qeth_iqd_is_mcast_queue(struct qeth_card *card,
 916                                            struct qeth_qdio_out_q *queue)
 917 {
 918         return qeth_iqd_translate_txq(card->dev, queue->queue_no) ==
 919                QETH_IQD_MCAST_TXQ;
 920 }
 921
 922 static inline void qeth_scrub_qdio_buffer(struct qdio_buffer *buf,
 923                                           unsigned int elements)
 924 {
 925         unsigned int i;
 926
 927         for (i = 0; i < elements; i++)
 928                 memset(&buf->element[i], 0, sizeof(struct qdio_buffer_element));
 929         buf->element[14].sflags = 0;
 930         buf->element[15].sflags = 0;
 931 }
 932
 933 /**
 934  * qeth_get_elements_for_range() -      find number of SBALEs to cover range.
 935  * @start:                              Start of the address range.
 936  * @end:                                Address after the end of the range.
 937  *
 938  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
 939  * the specified address range.
 940  */
 941 static inline int qeth_get_elements_for_range(addr_t start, addr_t end)
 942 {
 943         return PFN_UP(end) - PFN_DOWN(start);
 944 }
 945
 946 static inline int qeth_get_ether_cast_type(struct sk_buff *skb)
 947 {
 948         u8 *addr = eth_hdr(skb)->h_dest;
 949
 950         if (is_multicast_ether_addr(addr))
 951                 return is_broadcast_ether_addr(addr) ? RTN_BROADCAST :
 952                                                        RTN_MULTICAST;
 953         return RTN_UNICAST;
 954 }
 955
 956 static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb,
 957                                                    __be16 proto)
 958 {
 959         struct dst_entry *dst = skb_dst(skb);
 960         struct rt6_info *rt;
 961
 962         rt = (struct rt6_info *) dst;
 963         if (dst) {
 964                 if (proto == htons(ETH_P_IPV6))
 965                         dst = dst_check(dst, rt6_get_cookie(rt));
 966                 else
 967                         dst = dst_check(dst, 0);
 968         }
 969
 970         return dst;
 971 }
 972
 973 static inline __be32 qeth_next_hop_v4_rcu(struct sk_buff *skb,
 974                                           struct dst_entry *dst)
 975 {
 976         struct rtable *rt = (struct rtable *) dst;
 977
 978         return (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr;
 979 }
 980
 981 static inline struct in6_addr *qeth_next_hop_v6_rcu(struct sk_buff *skb,
 982                                                     struct dst_entry *dst)
 983 {
 984         struct rt6_info *rt = (struct rt6_info *) dst;
 985
 986         if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
 987                 return &rt->rt6i_gateway;
 988         else
 989                 return &ipv6_hdr(skb)->daddr;
 990 }
 991
 992 static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, __be16 proto)
 993 {
 994         *flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
 995         if ((proto == htons(ETH_P_IP) && ip_hdr(skb)->protocol == IPPROTO_UDP) ||
 996             (proto == htons(ETH_P_IPV6) && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP))
 997                 *flags |= QETH_HDR_EXT_UDP;
 998 }
 999
1000 static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
1001                 struct qeth_buffer_pool_entry *entry)
1002 {
1003         list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
1004 }
1005
1006 static inline int qeth_is_diagass_supported(struct qeth_card *card,
1007                 enum qeth_diags_cmds cmd)
1008 {
1009         return card->info.diagass_support & (__u32)cmd;
1010 }
1011
1012 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
1013                                       enum qeth_ipa_funcs ipa_func,
1014                                       u16 cmd_code, u32 *data,
1015                                       enum qeth_prot_versions prot);
1016 /* IPv4 variant */
1017 static inline int qeth_send_simple_setassparms(struct qeth_card *card,
1018                                                enum qeth_ipa_funcs ipa_func,
1019                                                u16 cmd_code, u32 *data)
1020 {
1021         return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1022                                                  data, QETH_PROT_IPV4);
1023 }
1024
1025 static inline int qeth_send_simple_setassparms_v6(struct qeth_card *card,
1026                                                   enum qeth_ipa_funcs ipa_func,
1027                                                   u16 cmd_code, u32 *data)
1028 {
1029         return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1030                                                  data, QETH_PROT_IPV6);
1031 }
1032
1033 extern const struct qeth_discipline qeth_l2_discipline;
1034 extern const struct qeth_discipline qeth_l3_discipline;
1035 extern const struct ethtool_ops qeth_ethtool_ops;
1036 extern const struct attribute_group *qeth_dev_groups[];
1037
1038 const char *qeth_get_cardname_short(struct qeth_card *);
1039 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count);
1040 int qeth_setup_discipline(struct qeth_card *card, enum qeth_discipline_id disc);
1041 void qeth_remove_discipline(struct qeth_card *card);
1042
1043 /* exports for qeth discipline device drivers */
1044 extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];
1045
1046 struct net_device *qeth_clone_netdev(struct net_device *orig);
1047 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
1048                               int clear_start_mask);
1049 int qeth_threads_running(struct qeth_card *, unsigned long);
1050 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
1051                      bool resetting);
1052
1053 int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
1054                   int (*reply_cb)
1055                   (struct qeth_card *, struct qeth_reply *, unsigned long),
1056                   void *);
1057 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
1058                                            enum qeth_ipa_cmds cmd_code,
1059                                            enum qeth_prot_versions prot,
1060                                            unsigned int data_length);
1061 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
1062                                                  enum qeth_ipa_funcs ipa_func,
1063                                                  u16 cmd_code,
1064                                                  unsigned int data_length,
1065                                                  enum qeth_prot_versions prot);
1066 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
1067                                           enum qeth_diags_cmds sub_cmd,
1068                                           unsigned int data_length);
1069
1070 int qeth_schedule_recovery(struct qeth_card *card);
1071 int qeth_poll(struct napi_struct *napi, int budget);
1072 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable);
1073 int qeth_setadpparms_change_macaddr(struct qeth_card *);
1074 void qeth_tx_timeout(struct net_device *, unsigned int txqueue);
1075 int qeth_query_switch_attributes(struct qeth_card *card,
1076                                   struct qeth_switch_info *sw_info);
1077 int qeth_query_card_info(struct qeth_card *card,
1078                          struct qeth_link_info *link_info);
1079 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
1080                                      enum qeth_ipa_isolation_modes mode);
1081
1082 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
1083 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1084                         void __user *data, int cmd);
1085 __printf(3, 4)
1086 void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
1087 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
1088 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
1089 int qeth_setassparms_cb(struct qeth_card *, struct qeth_reply *, unsigned long);
1090 int qeth_set_features(struct net_device *, netdev_features_t);
1091 void qeth_enable_hw_features(struct net_device *dev);
1092 netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
1093 netdev_features_t qeth_features_check(struct sk_buff *skb,
1094                                       struct net_device *dev,
1095                                       netdev_features_t features);
1096 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
1097 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count);
1098 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1099                           u8 cast_type, struct net_device *sb_dev);
1100 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1101                           struct net_device *sb_dev);
1102 int qeth_open(struct net_device *dev);
1103 int qeth_stop(struct net_device *dev);
1104
1105 int qeth_vm_request_mac(struct qeth_card *card);
1106 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
1107               struct qeth_qdio_out_q *queue, __be16 proto,
1108               void (*fill_header)(struct qeth_qdio_out_q *queue,
1109                                   struct qeth_hdr *hdr, struct sk_buff *skb,
1110                                   __be16 proto, unsigned int data_len));
1111
1112 #endif /* __QETH_CORE_H__ */