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[linux.git] / drivers / s390 / net / qeth_core.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *    Copyright IBM Corp. 2007
4  *    Author(s): Utz Bacher <[email protected]>,
5  *               Frank Pavlic <[email protected]>,
6  *               Thomas Spatzier <[email protected]>,
7  *               Frank Blaschka <[email protected]>
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 struct qeth_card {
805         enum qeth_card_states state;
806         spinlock_t lock;
807         struct ccwgroup_device *gdev;
808         struct qeth_cmd_buffer *read_cmd;
809         struct qeth_channel read;
810         struct qeth_channel write;
811         struct qeth_channel data;
812
813         struct net_device *dev;
814         struct dentry *debugfs;
815         struct qeth_card_stats stats;
816         struct qeth_card_info info;
817         struct qeth_token token;
818         struct qeth_seqno seqno;
819         struct qeth_card_options options;
820
821         struct workqueue_struct *event_wq;
822         struct workqueue_struct *cmd_wq;
823         wait_queue_head_t wait_q;
824
825         struct mutex ip_lock;
826         /* protected by ip_lock: */
827         DECLARE_HASHTABLE(ip_htable, 4);
828         struct qeth_ipato ipato;
829
830         DECLARE_HASHTABLE(local_addrs4, 4);
831         DECLARE_HASHTABLE(local_addrs6, 4);
832         spinlock_t local_addrs4_lock;
833         spinlock_t local_addrs6_lock;
834         DECLARE_HASHTABLE(rx_mode_addrs, 4);
835         struct work_struct rx_mode_work;
836         struct work_struct kernel_thread_starter;
837         spinlock_t thread_mask_lock;
838         unsigned long thread_start_mask;
839         unsigned long thread_allowed_mask;
840         unsigned long thread_running_mask;
841         struct list_head cmd_waiter_list;
842         /* QDIO buffer handling */
843         struct qeth_qdio_info qdio;
844         int read_or_write_problem;
845         const struct qeth_discipline *discipline;
846         atomic_t force_alloc_skb;
847         struct service_level qeth_service_level;
848         struct qdio_ssqd_desc ssqd;
849         debug_info_t *debug;
850         struct mutex sbp_lock;
851         struct mutex conf_mutex;
852         struct mutex discipline_mutex;
853         struct napi_struct napi;
854         struct qeth_rx rx;
855         struct delayed_work buffer_reclaim_work;
856 };
857
858 static inline bool qeth_card_hw_is_reachable(struct qeth_card *card)
859 {
860         return card->state == CARD_STATE_SOFTSETUP;
861 }
862
863 static inline bool qeth_use_tx_irqs(struct qeth_card *card)
864 {
865         return !IS_IQD(card);
866 }
867
868 static inline void qeth_unlock_channel(struct qeth_card *card,
869                                        struct qeth_channel *channel)
870 {
871         xchg(&channel->active_cmd, NULL);
872         wake_up(&card->wait_q);
873 }
874
875 static inline bool qeth_trylock_channel(struct qeth_channel *channel,
876                                         struct qeth_cmd_buffer *cmd)
877 {
878         return cmpxchg(&channel->active_cmd, NULL, cmd) == NULL;
879 }
880
881 struct qeth_trap_id {
882         __u16 lparnr;
883         char vmname[8];
884         __u8 chpid;
885         __u8 ssid;
886         __u16 devno;
887 } __packed;
888
889 static inline bool qeth_uses_tx_prio_queueing(struct qeth_card *card)
890 {
891         return card->qdio.do_prio_queueing != QETH_NO_PRIO_QUEUEING;
892 }
893
894 static inline unsigned int qeth_tx_actual_queues(struct qeth_card *card)
895 {
896         struct qeth_priv *priv = netdev_priv(card->dev);
897
898         if (qeth_uses_tx_prio_queueing(card))
899                 return min(card->dev->num_tx_queues, card->qdio.no_out_queues);
900
901         return min(priv->tx_wanted_queues, card->qdio.no_out_queues);
902 }
903
904 static inline u16 qeth_iqd_translate_txq(struct net_device *dev, u16 txq)
905 {
906         if (txq == QETH_IQD_MCAST_TXQ)
907                 return dev->num_tx_queues - 1;
908         if (txq == dev->num_tx_queues - 1)
909                 return QETH_IQD_MCAST_TXQ;
910         return txq;
911 }
912
913 static inline bool qeth_iqd_is_mcast_queue(struct qeth_card *card,
914                                            struct qeth_qdio_out_q *queue)
915 {
916         return qeth_iqd_translate_txq(card->dev, queue->queue_no) ==
917                QETH_IQD_MCAST_TXQ;
918 }
919
920 static inline void qeth_scrub_qdio_buffer(struct qdio_buffer *buf,
921                                           unsigned int elements)
922 {
923         unsigned int i;
924
925         for (i = 0; i < elements; i++)
926                 memset(&buf->element[i], 0, sizeof(struct qdio_buffer_element));
927         buf->element[14].sflags = 0;
928         buf->element[15].sflags = 0;
929 }
930
931 /**
932  * qeth_get_elements_for_range() -      find number of SBALEs to cover range.
933  * @start:                              Start of the address range.
934  * @end:                                Address after the end of the range.
935  *
936  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
937  * the specified address range.
938  */
939 static inline int qeth_get_elements_for_range(addr_t start, addr_t end)
940 {
941         return PFN_UP(end) - PFN_DOWN(start);
942 }
943
944 static inline int qeth_get_ether_cast_type(struct sk_buff *skb)
945 {
946         u8 *addr = eth_hdr(skb)->h_dest;
947
948         if (is_multicast_ether_addr(addr))
949                 return is_broadcast_ether_addr(addr) ? RTN_BROADCAST :
950                                                        RTN_MULTICAST;
951         return RTN_UNICAST;
952 }
953
954 static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb,
955                                                    __be16 proto)
956 {
957         struct dst_entry *dst = skb_dst(skb);
958         struct rt6_info *rt;
959
960         rt = (struct rt6_info *) dst;
961         if (dst) {
962                 if (proto == htons(ETH_P_IPV6))
963                         dst = dst_check(dst, rt6_get_cookie(rt));
964                 else
965                         dst = dst_check(dst, 0);
966         }
967
968         return dst;
969 }
970
971 static inline __be32 qeth_next_hop_v4_rcu(struct sk_buff *skb,
972                                           struct dst_entry *dst)
973 {
974         struct rtable *rt = (struct rtable *) dst;
975
976         return (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr;
977 }
978
979 static inline struct in6_addr *qeth_next_hop_v6_rcu(struct sk_buff *skb,
980                                                     struct dst_entry *dst)
981 {
982         struct rt6_info *rt = (struct rt6_info *) dst;
983
984         if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
985                 return &rt->rt6i_gateway;
986         else
987                 return &ipv6_hdr(skb)->daddr;
988 }
989
990 static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, __be16 proto)
991 {
992         *flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
993         if ((proto == htons(ETH_P_IP) && ip_hdr(skb)->protocol == IPPROTO_UDP) ||
994             (proto == htons(ETH_P_IPV6) && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP))
995                 *flags |= QETH_HDR_EXT_UDP;
996 }
997
998 static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
999                 struct qeth_buffer_pool_entry *entry)
1000 {
1001         list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
1002 }
1003
1004 static inline int qeth_is_diagass_supported(struct qeth_card *card,
1005                 enum qeth_diags_cmds cmd)
1006 {
1007         return card->info.diagass_support & (__u32)cmd;
1008 }
1009
1010 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
1011                                       enum qeth_ipa_funcs ipa_func,
1012                                       u16 cmd_code, u32 *data,
1013                                       enum qeth_prot_versions prot);
1014 /* IPv4 variant */
1015 static inline int qeth_send_simple_setassparms(struct qeth_card *card,
1016                                                enum qeth_ipa_funcs ipa_func,
1017                                                u16 cmd_code, u32 *data)
1018 {
1019         return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1020                                                  data, QETH_PROT_IPV4);
1021 }
1022
1023 static inline int qeth_send_simple_setassparms_v6(struct qeth_card *card,
1024                                                   enum qeth_ipa_funcs ipa_func,
1025                                                   u16 cmd_code, u32 *data)
1026 {
1027         return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1028                                                  data, QETH_PROT_IPV6);
1029 }
1030
1031 extern const struct qeth_discipline qeth_l2_discipline;
1032 extern const struct qeth_discipline qeth_l3_discipline;
1033 extern const struct ethtool_ops qeth_ethtool_ops;
1034 extern const struct attribute_group *qeth_dev_groups[];
1035
1036 const char *qeth_get_cardname_short(struct qeth_card *);
1037 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count);
1038 int qeth_setup_discipline(struct qeth_card *card, enum qeth_discipline_id disc);
1039 void qeth_remove_discipline(struct qeth_card *card);
1040
1041 /* exports for qeth discipline device drivers */
1042 extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];
1043
1044 struct net_device *qeth_clone_netdev(struct net_device *orig);
1045 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
1046                               int clear_start_mask);
1047 int qeth_threads_running(struct qeth_card *, unsigned long);
1048 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
1049                      bool resetting);
1050
1051 int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
1052                   int (*reply_cb)
1053                   (struct qeth_card *, struct qeth_reply *, unsigned long),
1054                   void *);
1055 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
1056                                            enum qeth_ipa_cmds cmd_code,
1057                                            enum qeth_prot_versions prot,
1058                                            unsigned int data_length);
1059 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
1060                                                  enum qeth_ipa_funcs ipa_func,
1061                                                  u16 cmd_code,
1062                                                  unsigned int data_length,
1063                                                  enum qeth_prot_versions prot);
1064 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
1065                                           enum qeth_diags_cmds sub_cmd,
1066                                           unsigned int data_length);
1067
1068 int qeth_schedule_recovery(struct qeth_card *card);
1069 int qeth_poll(struct napi_struct *napi, int budget);
1070 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable);
1071 int qeth_setadpparms_change_macaddr(struct qeth_card *);
1072 void qeth_tx_timeout(struct net_device *, unsigned int txqueue);
1073 int qeth_query_switch_attributes(struct qeth_card *card,
1074                                   struct qeth_switch_info *sw_info);
1075 int qeth_query_card_info(struct qeth_card *card,
1076                          struct qeth_link_info *link_info);
1077 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
1078                                      enum qeth_ipa_isolation_modes mode);
1079
1080 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
1081 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1082                         void __user *data, int cmd);
1083 __printf(3, 4)
1084 void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
1085 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
1086 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
1087 int qeth_setassparms_cb(struct qeth_card *, struct qeth_reply *, unsigned long);
1088 int qeth_set_features(struct net_device *, netdev_features_t);
1089 void qeth_enable_hw_features(struct net_device *dev);
1090 netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
1091 netdev_features_t qeth_features_check(struct sk_buff *skb,
1092                                       struct net_device *dev,
1093                                       netdev_features_t features);
1094 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
1095 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count);
1096 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1097                           u8 cast_type, struct net_device *sb_dev);
1098 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1099                           struct net_device *sb_dev);
1100 int qeth_open(struct net_device *dev);
1101 int qeth_stop(struct net_device *dev);
1102
1103 int qeth_vm_request_mac(struct qeth_card *card);
1104 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
1105               struct qeth_qdio_out_q *queue, __be16 proto,
1106               void (*fill_header)(struct qeth_qdio_out_q *queue,
1107                                   struct qeth_hdr *hdr, struct sk_buff *skb,
1108                                   __be16 proto, unsigned int data_len));
1109
1110 #endif /* __QETH_CORE_H__ */
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