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 
qeth_get_device_id(struct ccw_device * cdev)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 
qeth_l2_same_vlan(struct qeth_hdr_layer2 * h1,struct qeth_hdr_layer2 * h2)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 
qeth_l3_iqd_same_vlan(struct qeth_hdr_layer3 * h1,struct qeth_hdr_layer3 * h2)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 
qeth_l3_same_next_hop(struct qeth_hdr_layer3 * h1,struct qeth_hdr_layer3 * h2)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 
qeth_tx_arm_timer(struct qeth_qdio_out_q * queue,unsigned long usecs)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 
qeth_out_queue_is_full(struct qeth_qdio_out_q * queue)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 
qeth_out_queue_is_empty(struct qeth_qdio_out_q * queue)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 
qeth_get_cmd(struct qeth_cmd_buffer * iob)632 static inline void qeth_get_cmd(struct qeth_cmd_buffer *iob)
633 {
634 	refcount_inc(&iob->ref_count);
635 }
636 
__ipa_reply(struct qeth_cmd_buffer * iob)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 
__ipa_cmd(struct qeth_cmd_buffer * iob)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 
__ccw_from_cmd(struct qeth_cmd_buffer * iob)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 promisc_mode:1;
720 	u8 use_v1_blkt:1;
721 	u8 is_vm_nic:1;
722 	/* no bitfield, we take a pointer on these two: */
723 	u8 has_lp2lp_cso_v6;
724 	u8 has_lp2lp_cso_v4;
725 	enum qeth_pnso_mode pnso_mode;
726 	enum qeth_card_types type;
727 	enum qeth_link_types link_type;
728 	int broadcast_capable;
729 	bool layer_enforced;
730 	struct qeth_card_blkt blkt;
731 	__u32 diagass_support;
732 	__u32 hwtrap;
733 	struct qeth_link_info link_info;
734 };
735 
736 enum qeth_discipline_id {
737 	QETH_DISCIPLINE_UNDETERMINED = -1,
738 	QETH_DISCIPLINE_LAYER3 = 0,
739 	QETH_DISCIPLINE_LAYER2 = 1,
740 };
741 
742 struct qeth_card_options {
743 	struct qeth_ipa_caps ipa4;
744 	struct qeth_ipa_caps ipa6;
745 	struct qeth_routing_info route4;
746 	struct qeth_routing_info route6;
747 	struct qeth_ipa_caps adp; /* Adapter parameters */
748 	struct qeth_sbp_info sbp; /* SETBRIDGEPORT options */
749 	struct qeth_vnicc_info vnicc; /* VNICC options */
750 	enum qeth_discipline_id layer;
751 	enum qeth_ipa_isolation_modes isolation;
752 	int sniffer;
753 	enum qeth_cq cq;
754 	char hsuid[9];
755 };
756 
757 #define	IS_LAYER2(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER2)
758 #define	IS_LAYER3(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER3)
759 
760 /*
761  * thread bits for qeth_card thread masks
762  */
763 enum qeth_threads {
764 	QETH_RECOVER_THREAD = 1,
765 };
766 
767 struct qeth_discipline {
768 	int (*setup) (struct ccwgroup_device *);
769 	void (*remove) (struct ccwgroup_device *);
770 	int (*set_online)(struct qeth_card *card, bool carrier_ok);
771 	void (*set_offline)(struct qeth_card *card);
772 	int (*control_event_handler)(struct qeth_card *card,
773 					struct qeth_ipa_cmd *cmd);
774 };
775 
776 enum qeth_addr_disposition {
777 	QETH_DISP_ADDR_DELETE = 0,
778 	QETH_DISP_ADDR_DO_NOTHING = 1,
779 	QETH_DISP_ADDR_ADD = 2,
780 };
781 
782 struct qeth_rx {
783 	int b_count;
784 	int b_index;
785 	u8 buf_element;
786 	int e_offset;
787 	int qdio_err;
788 	u8 bufs_refill;
789 };
790 
791 struct qeth_switch_info {
792 	__u32 capabilities;
793 	__u32 settings;
794 };
795 
796 struct qeth_priv {
797 	unsigned int rx_copybreak;
798 	unsigned int tx_wanted_queues;
799 	u32 brport_hw_features;
800 	u32 brport_features;
801 };
802 
803 struct qeth_card {
804 	enum qeth_card_states state;
805 	spinlock_t lock;
806 	struct ccwgroup_device *gdev;
807 	struct qeth_cmd_buffer *read_cmd;
808 	struct qeth_channel read;
809 	struct qeth_channel write;
810 	struct qeth_channel data;
811 
812 	struct net_device *dev;
813 	struct dentry *debugfs;
814 	struct qeth_card_stats stats;
815 	struct qeth_card_info info;
816 	struct qeth_token token;
817 	struct qeth_seqno seqno;
818 	struct qeth_card_options options;
819 
820 	struct workqueue_struct *event_wq;
821 	struct workqueue_struct *cmd_wq;
822 	wait_queue_head_t wait_q;
823 
824 	struct mutex ip_lock;
825 	/* protected by ip_lock: */
826 	DECLARE_HASHTABLE(ip_htable, 4);
827 	struct qeth_ipato ipato;
828 
829 	DECLARE_HASHTABLE(local_addrs4, 4);
830 	DECLARE_HASHTABLE(local_addrs6, 4);
831 	spinlock_t local_addrs4_lock;
832 	spinlock_t local_addrs6_lock;
833 	DECLARE_HASHTABLE(rx_mode_addrs, 4);
834 	struct work_struct rx_mode_work;
835 	struct work_struct kernel_thread_starter;
836 	spinlock_t thread_mask_lock;
837 	unsigned long thread_start_mask;
838 	unsigned long thread_allowed_mask;
839 	unsigned long thread_running_mask;
840 	struct list_head cmd_waiter_list;
841 	/* QDIO buffer handling */
842 	struct qeth_qdio_info qdio;
843 	int read_or_write_problem;
844 	const struct qeth_discipline *discipline;
845 	atomic_t force_alloc_skb;
846 	struct service_level qeth_service_level;
847 	struct qdio_ssqd_desc ssqd;
848 	debug_info_t *debug;
849 	struct mutex sbp_lock;
850 	struct mutex conf_mutex;
851 	struct mutex discipline_mutex;
852 	struct napi_struct napi;
853 	struct qeth_rx rx;
854 	struct delayed_work buffer_reclaim_work;
855 };
856 
qeth_card_hw_is_reachable(struct qeth_card * card)857 static inline bool qeth_card_hw_is_reachable(struct qeth_card *card)
858 {
859 	return card->state == CARD_STATE_SOFTSETUP;
860 }
861 
qeth_use_tx_irqs(struct qeth_card * card)862 static inline bool qeth_use_tx_irqs(struct qeth_card *card)
863 {
864 	return !IS_IQD(card);
865 }
866 
qeth_unlock_channel(struct qeth_card * card,struct qeth_channel * channel)867 static inline void qeth_unlock_channel(struct qeth_card *card,
868 				       struct qeth_channel *channel)
869 {
870 	xchg(&channel->active_cmd, NULL);
871 	wake_up(&card->wait_q);
872 }
873 
qeth_trylock_channel(struct qeth_channel * channel,struct qeth_cmd_buffer * cmd)874 static inline bool qeth_trylock_channel(struct qeth_channel *channel,
875 					struct qeth_cmd_buffer *cmd)
876 {
877 	return cmpxchg(&channel->active_cmd, NULL, cmd) == NULL;
878 }
879 
880 struct qeth_trap_id {
881 	__u16 lparnr;
882 	char vmname[8];
883 	__u8 chpid;
884 	__u8 ssid;
885 	__u16 devno;
886 } __packed;
887 
qeth_uses_tx_prio_queueing(struct qeth_card * card)888 static inline bool qeth_uses_tx_prio_queueing(struct qeth_card *card)
889 {
890 	return card->qdio.do_prio_queueing != QETH_NO_PRIO_QUEUEING;
891 }
892 
qeth_tx_actual_queues(struct qeth_card * card)893 static inline unsigned int qeth_tx_actual_queues(struct qeth_card *card)
894 {
895 	struct qeth_priv *priv = netdev_priv(card->dev);
896 
897 	if (qeth_uses_tx_prio_queueing(card))
898 		return min(card->dev->num_tx_queues, card->qdio.no_out_queues);
899 
900 	return min(priv->tx_wanted_queues, card->qdio.no_out_queues);
901 }
902 
qeth_iqd_translate_txq(struct net_device * dev,u16 txq)903 static inline u16 qeth_iqd_translate_txq(struct net_device *dev, u16 txq)
904 {
905 	if (txq == QETH_IQD_MCAST_TXQ)
906 		return dev->num_tx_queues - 1;
907 	if (txq == dev->num_tx_queues - 1)
908 		return QETH_IQD_MCAST_TXQ;
909 	return txq;
910 }
911 
qeth_iqd_is_mcast_queue(struct qeth_card * card,struct qeth_qdio_out_q * queue)912 static inline bool qeth_iqd_is_mcast_queue(struct qeth_card *card,
913 					   struct qeth_qdio_out_q *queue)
914 {
915 	return qeth_iqd_translate_txq(card->dev, queue->queue_no) ==
916 	       QETH_IQD_MCAST_TXQ;
917 }
918 
qeth_scrub_qdio_buffer(struct qdio_buffer * buf,unsigned int elements)919 static inline void qeth_scrub_qdio_buffer(struct qdio_buffer *buf,
920 					  unsigned int elements)
921 {
922 	unsigned int i;
923 
924 	for (i = 0; i < elements; i++)
925 		memset(&buf->element[i], 0, sizeof(struct qdio_buffer_element));
926 	buf->element[14].sflags = 0;
927 	buf->element[15].sflags = 0;
928 }
929 
930 /**
931  * qeth_get_elements_for_range() -	find number of SBALEs to cover range.
932  * @start:				Start of the address range.
933  * @end:				Address after the end of the range.
934  *
935  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
936  * the specified address range.
937  */
qeth_get_elements_for_range(addr_t start,addr_t end)938 static inline int qeth_get_elements_for_range(addr_t start, addr_t end)
939 {
940 	return PFN_UP(end) - PFN_DOWN(start);
941 }
942 
qeth_get_ether_cast_type(struct sk_buff * skb)943 static inline int qeth_get_ether_cast_type(struct sk_buff *skb)
944 {
945 	u8 *addr = eth_hdr(skb)->h_dest;
946 
947 	if (is_multicast_ether_addr(addr))
948 		return is_broadcast_ether_addr(addr) ? RTN_BROADCAST :
949 						       RTN_MULTICAST;
950 	return RTN_UNICAST;
951 }
952 
qeth_dst_check_rcu(struct sk_buff * skb,__be16 proto)953 static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb,
954 						   __be16 proto)
955 {
956 	struct dst_entry *dst = skb_dst(skb);
957 	struct rt6_info *rt;
958 
959 	rt = (struct rt6_info *) dst;
960 	if (dst) {
961 		if (proto == htons(ETH_P_IPV6))
962 			dst = dst_check(dst, rt6_get_cookie(rt));
963 		else
964 			dst = dst_check(dst, 0);
965 	}
966 
967 	return dst;
968 }
969 
qeth_next_hop_v4_rcu(struct sk_buff * skb,struct dst_entry * dst)970 static inline __be32 qeth_next_hop_v4_rcu(struct sk_buff *skb,
971 					  struct dst_entry *dst)
972 {
973 	struct rtable *rt = (struct rtable *) dst;
974 
975 	return (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr;
976 }
977 
qeth_next_hop_v6_rcu(struct sk_buff * skb,struct dst_entry * dst)978 static inline struct in6_addr *qeth_next_hop_v6_rcu(struct sk_buff *skb,
979 						    struct dst_entry *dst)
980 {
981 	struct rt6_info *rt = (struct rt6_info *) dst;
982 
983 	if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
984 		return &rt->rt6i_gateway;
985 	else
986 		return &ipv6_hdr(skb)->daddr;
987 }
988 
qeth_tx_csum(struct sk_buff * skb,u8 * flags,__be16 proto)989 static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, __be16 proto)
990 {
991 	*flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
992 	if ((proto == htons(ETH_P_IP) && ip_hdr(skb)->protocol == IPPROTO_UDP) ||
993 	    (proto == htons(ETH_P_IPV6) && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP))
994 		*flags |= QETH_HDR_EXT_UDP;
995 }
996 
qeth_put_buffer_pool_entry(struct qeth_card * card,struct qeth_buffer_pool_entry * entry)997 static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
998 		struct qeth_buffer_pool_entry *entry)
999 {
1000 	list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
1001 }
1002 
qeth_is_diagass_supported(struct qeth_card * card,enum qeth_diags_cmds cmd)1003 static inline int qeth_is_diagass_supported(struct qeth_card *card,
1004 		enum qeth_diags_cmds cmd)
1005 {
1006 	return card->info.diagass_support & (__u32)cmd;
1007 }
1008 
1009 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
1010 				      enum qeth_ipa_funcs ipa_func,
1011 				      u16 cmd_code, u32 *data,
1012 				      enum qeth_prot_versions prot);
1013 /* IPv4 variant */
qeth_send_simple_setassparms(struct qeth_card * card,enum qeth_ipa_funcs ipa_func,u16 cmd_code,u32 * data)1014 static inline int qeth_send_simple_setassparms(struct qeth_card *card,
1015 					       enum qeth_ipa_funcs ipa_func,
1016 					       u16 cmd_code, u32 *data)
1017 {
1018 	return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1019 						 data, QETH_PROT_IPV4);
1020 }
1021 
qeth_send_simple_setassparms_v6(struct qeth_card * card,enum qeth_ipa_funcs ipa_func,u16 cmd_code,u32 * data)1022 static inline int qeth_send_simple_setassparms_v6(struct qeth_card *card,
1023 						  enum qeth_ipa_funcs ipa_func,
1024 						  u16 cmd_code, u32 *data)
1025 {
1026 	return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
1027 						 data, QETH_PROT_IPV6);
1028 }
1029 
1030 extern const struct qeth_discipline qeth_l2_discipline;
1031 extern const struct qeth_discipline qeth_l3_discipline;
1032 extern const struct ethtool_ops qeth_ethtool_ops;
1033 extern const struct attribute_group *qeth_dev_groups[];
1034 
1035 const char *qeth_get_cardname_short(struct qeth_card *);
1036 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count);
1037 int qeth_setup_discipline(struct qeth_card *card, enum qeth_discipline_id disc);
1038 void qeth_remove_discipline(struct qeth_card *card);
1039 
1040 /* exports for qeth discipline device drivers */
1041 extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];
1042 
1043 struct net_device *qeth_clone_netdev(struct net_device *orig);
1044 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
1045 			      int clear_start_mask);
1046 int qeth_threads_running(struct qeth_card *, unsigned long);
1047 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
1048 		     bool resetting);
1049 
1050 int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
1051 		  int (*reply_cb)
1052 		  (struct qeth_card *, struct qeth_reply *, unsigned long),
1053 		  void *);
1054 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
1055 					   enum qeth_ipa_cmds cmd_code,
1056 					   enum qeth_prot_versions prot,
1057 					   unsigned int data_length);
1058 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
1059 						 enum qeth_ipa_funcs ipa_func,
1060 						 u16 cmd_code,
1061 						 unsigned int data_length,
1062 						 enum qeth_prot_versions prot);
1063 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
1064 					  enum qeth_diags_cmds sub_cmd,
1065 					  unsigned int data_length);
1066 
1067 int qeth_schedule_recovery(struct qeth_card *card);
1068 int qeth_poll(struct napi_struct *napi, int budget);
1069 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable);
1070 int qeth_setadpparms_change_macaddr(struct qeth_card *);
1071 void qeth_tx_timeout(struct net_device *, unsigned int txqueue);
1072 int qeth_query_switch_attributes(struct qeth_card *card,
1073 				  struct qeth_switch_info *sw_info);
1074 int qeth_query_card_info(struct qeth_card *card,
1075 			 struct qeth_link_info *link_info);
1076 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
1077 				     enum qeth_ipa_isolation_modes mode);
1078 
1079 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
1080 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1081 			void __user *data, int cmd);
1082 __printf(3, 4)
1083 void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
1084 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
1085 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
1086 int qeth_setassparms_cb(struct qeth_card *, struct qeth_reply *, unsigned long);
1087 int qeth_set_features(struct net_device *, netdev_features_t);
1088 void qeth_enable_hw_features(struct net_device *dev);
1089 netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
1090 netdev_features_t qeth_features_check(struct sk_buff *skb,
1091 				      struct net_device *dev,
1092 				      netdev_features_t features);
1093 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats);
1094 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count);
1095 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1096 			  u8 cast_type, struct net_device *sb_dev);
1097 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1098 			  struct net_device *sb_dev);
1099 int qeth_open(struct net_device *dev);
1100 int qeth_stop(struct net_device *dev);
1101 
1102 int qeth_vm_request_mac(struct qeth_card *card);
1103 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
1104 	      struct qeth_qdio_out_q *queue, __be16 proto,
1105 	      void (*fill_header)(struct qeth_qdio_out_q *queue,
1106 				  struct qeth_hdr *hdr, struct sk_buff *skb,
1107 				  __be16 proto, unsigned int data_len));
1108 
1109 #endif /* __QETH_CORE_H__ */
1110