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1da177e4 LT |
1 | /* |
2 | * | |
3 | * linux/drivers/s390/cio/qdio.c | |
4 | * | |
5 | * Linux for S/390 QDIO base support, Hipersocket base support | |
6 | * version 2 | |
7 | * | |
8 | * Copyright 2000,2002 IBM Corporation | |
9 | * Author(s): Utz Bacher <utz.bacher@de.ibm.com> | |
10 | * 2.6 cio integration by Cornelia Huck <cohuck@de.ibm.com> | |
11 | * | |
12 | * Restriction: only 63 iqdio subchannels would have its own indicator, | |
13 | * after that, subsequent subchannels share one indicator | |
14 | * | |
15 | * | |
16 | * | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2, or (at your option) | |
21 | * any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
31 | */ | |
32 | ||
33 | #include <linux/config.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/init.h> | |
36 | ||
37 | #include <linux/slab.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/proc_fs.h> | |
40 | #include <linux/timer.h> | |
41 | ||
42 | #include <asm/ccwdev.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/atomic.h> | |
45 | #include <asm/semaphore.h> | |
46 | #include <asm/timex.h> | |
47 | ||
48 | #include <asm/debug.h> | |
49 | #include <asm/qdio.h> | |
50 | ||
51 | #include "cio.h" | |
52 | #include "css.h" | |
53 | #include "device.h" | |
54 | #include "airq.h" | |
55 | #include "qdio.h" | |
56 | #include "ioasm.h" | |
57 | #include "chsc.h" | |
58 | ||
66a464db | 59 | #define VERSION_QDIO_C "$Revision: 1.101 $" |
1da177e4 LT |
60 | |
61 | /****************** MODULE PARAMETER VARIABLES ********************/ | |
62 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>"); | |
63 | MODULE_DESCRIPTION("QDIO base support version 2, " \ | |
64 | "Copyright 2000 IBM Corporation"); | |
65 | MODULE_LICENSE("GPL"); | |
66 | ||
67 | /******************** HERE WE GO ***********************************/ | |
68 | ||
69 | static const char version[] = "QDIO base support version 2 (" | |
70 | VERSION_QDIO_C "/" VERSION_QDIO_H "/" VERSION_CIO_QDIO_H ")"; | |
71 | ||
72 | #ifdef QDIO_PERFORMANCE_STATS | |
73 | static int proc_perf_file_registration; | |
74 | static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc; | |
75 | static struct qdio_perf_stats perf_stats; | |
76 | #endif /* QDIO_PERFORMANCE_STATS */ | |
77 | ||
78 | static int hydra_thinints; | |
79 | static int omit_svs; | |
80 | ||
81 | static int indicator_used[INDICATORS_PER_CACHELINE]; | |
82 | static __u32 * volatile indicators; | |
83 | static __u32 volatile spare_indicator; | |
84 | static atomic_t spare_indicator_usecount; | |
85 | ||
86 | static debug_info_t *qdio_dbf_setup; | |
87 | static debug_info_t *qdio_dbf_sbal; | |
88 | static debug_info_t *qdio_dbf_trace; | |
89 | static debug_info_t *qdio_dbf_sense; | |
90 | #ifdef CONFIG_QDIO_DEBUG | |
91 | static debug_info_t *qdio_dbf_slsb_out; | |
92 | static debug_info_t *qdio_dbf_slsb_in; | |
93 | #endif /* CONFIG_QDIO_DEBUG */ | |
94 | ||
95 | /* iQDIO stuff: */ | |
96 | static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change | |
97 | during a while loop */ | |
98 | static DEFINE_SPINLOCK(ttiq_list_lock); | |
99 | static int register_thinint_result; | |
100 | static void tiqdio_tl(unsigned long); | |
101 | static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0); | |
102 | ||
103 | /* not a macro, as one of the arguments is atomic_read */ | |
104 | static inline int | |
105 | qdio_min(int a,int b) | |
106 | { | |
107 | if (a<b) | |
108 | return a; | |
109 | else | |
110 | return b; | |
111 | } | |
112 | ||
113 | /***************** SCRUBBER HELPER ROUTINES **********************/ | |
114 | ||
115 | static inline volatile __u64 | |
116 | qdio_get_micros(void) | |
117 | { | |
118 | return (get_clock() >> 10); /* time>>12 is microseconds */ | |
119 | } | |
120 | ||
121 | /* | |
122 | * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve | |
123 | * the q in any case, so that we'll not be interrupted when we are in | |
124 | * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost | |
125 | * ever works (last famous words) | |
126 | */ | |
127 | static inline int | |
128 | qdio_reserve_q(struct qdio_q *q) | |
129 | { | |
130 | return atomic_add_return(1,&q->use_count) - 1; | |
131 | } | |
132 | ||
133 | static inline void | |
134 | qdio_release_q(struct qdio_q *q) | |
135 | { | |
136 | atomic_dec(&q->use_count); | |
137 | } | |
138 | ||
139 | static volatile inline void | |
140 | qdio_set_slsb(volatile char *slsb, unsigned char value) | |
141 | { | |
142 | xchg((char*)slsb,value); | |
143 | } | |
144 | ||
145 | static inline int | |
146 | qdio_siga_sync(struct qdio_q *q, unsigned int gpr2, | |
147 | unsigned int gpr3) | |
148 | { | |
149 | int cc; | |
150 | ||
151 | QDIO_DBF_TEXT4(0,trace,"sigasync"); | |
152 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
153 | ||
154 | #ifdef QDIO_PERFORMANCE_STATS | |
155 | perf_stats.siga_syncs++; | |
156 | #endif /* QDIO_PERFORMANCE_STATS */ | |
157 | ||
158 | cc = do_siga_sync(q->irq, gpr2, gpr3); | |
159 | if (cc) | |
160 | QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*)); | |
161 | ||
162 | return cc; | |
163 | } | |
164 | ||
165 | static inline int | |
166 | qdio_siga_sync_q(struct qdio_q *q) | |
167 | { | |
168 | if (q->is_input_q) | |
169 | return qdio_siga_sync(q, 0, q->mask); | |
170 | return qdio_siga_sync(q, q->mask, 0); | |
171 | } | |
172 | ||
173 | /* | |
174 | * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns | |
175 | * an access exception | |
176 | */ | |
177 | static inline int | |
178 | qdio_siga_output(struct qdio_q *q) | |
179 | { | |
180 | int cc; | |
181 | __u32 busy_bit; | |
182 | __u64 start_time=0; | |
183 | ||
184 | #ifdef QDIO_PERFORMANCE_STATS | |
185 | perf_stats.siga_outs++; | |
186 | #endif /* QDIO_PERFORMANCE_STATS */ | |
187 | ||
188 | QDIO_DBF_TEXT4(0,trace,"sigaout"); | |
189 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
190 | ||
191 | for (;;) { | |
192 | cc = do_siga_output(q->irq, q->mask, &busy_bit); | |
193 | //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit); | |
194 | if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) { | |
195 | if (!start_time) | |
196 | start_time=NOW; | |
197 | if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE) | |
198 | break; | |
199 | } else | |
200 | break; | |
201 | } | |
202 | ||
203 | if ((cc==2) && (busy_bit)) | |
204 | cc |= QDIO_SIGA_ERROR_B_BIT_SET; | |
205 | ||
206 | if (cc) | |
207 | QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*)); | |
208 | ||
209 | return cc; | |
210 | } | |
211 | ||
212 | static inline int | |
213 | qdio_siga_input(struct qdio_q *q) | |
214 | { | |
215 | int cc; | |
216 | ||
217 | QDIO_DBF_TEXT4(0,trace,"sigain"); | |
218 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
219 | ||
220 | #ifdef QDIO_PERFORMANCE_STATS | |
221 | perf_stats.siga_ins++; | |
222 | #endif /* QDIO_PERFORMANCE_STATS */ | |
223 | ||
224 | cc = do_siga_input(q->irq, q->mask); | |
225 | ||
226 | if (cc) | |
227 | QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*)); | |
228 | ||
229 | return cc; | |
230 | } | |
231 | ||
232 | /* locked by the locks in qdio_activate and qdio_cleanup */ | |
233 | static __u32 * volatile | |
234 | qdio_get_indicator(void) | |
235 | { | |
236 | int i; | |
237 | ||
238 | for (i=1;i<INDICATORS_PER_CACHELINE;i++) | |
239 | if (!indicator_used[i]) { | |
240 | indicator_used[i]=1; | |
241 | return indicators+i; | |
242 | } | |
243 | atomic_inc(&spare_indicator_usecount); | |
244 | return (__u32 * volatile) &spare_indicator; | |
245 | } | |
246 | ||
247 | /* locked by the locks in qdio_activate and qdio_cleanup */ | |
248 | static void | |
249 | qdio_put_indicator(__u32 *addr) | |
250 | { | |
251 | int i; | |
252 | ||
253 | if ( (addr) && (addr!=&spare_indicator) ) { | |
254 | i=addr-indicators; | |
255 | indicator_used[i]=0; | |
256 | } | |
257 | if (addr == &spare_indicator) | |
258 | atomic_dec(&spare_indicator_usecount); | |
259 | } | |
260 | ||
261 | static inline volatile void | |
262 | tiqdio_clear_summary_bit(__u32 *location) | |
263 | { | |
264 | QDIO_DBF_TEXT5(0,trace,"clrsummb"); | |
265 | QDIO_DBF_HEX5(0,trace,&location,sizeof(void*)); | |
266 | ||
267 | xchg(location,0); | |
268 | } | |
269 | ||
270 | static inline volatile void | |
271 | tiqdio_set_summary_bit(__u32 *location) | |
272 | { | |
273 | QDIO_DBF_TEXT5(0,trace,"setsummb"); | |
274 | QDIO_DBF_HEX5(0,trace,&location,sizeof(void*)); | |
275 | ||
276 | xchg(location,-1); | |
277 | } | |
278 | ||
279 | static inline void | |
280 | tiqdio_sched_tl(void) | |
281 | { | |
282 | tasklet_hi_schedule(&tiqdio_tasklet); | |
283 | } | |
284 | ||
285 | static inline void | |
286 | qdio_mark_tiq(struct qdio_q *q) | |
287 | { | |
288 | unsigned long flags; | |
289 | ||
290 | QDIO_DBF_TEXT4(0,trace,"mark iq"); | |
291 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
292 | ||
293 | spin_lock_irqsave(&ttiq_list_lock,flags); | |
294 | if (unlikely(atomic_read(&q->is_in_shutdown))) | |
295 | goto out_unlock; | |
296 | ||
297 | if (!q->is_input_q) | |
298 | goto out_unlock; | |
299 | ||
300 | if ((q->list_prev) || (q->list_next)) | |
301 | goto out_unlock; | |
302 | ||
303 | if (!tiq_list) { | |
304 | tiq_list=q; | |
305 | q->list_prev=q; | |
306 | q->list_next=q; | |
307 | } else { | |
308 | q->list_next=tiq_list; | |
309 | q->list_prev=tiq_list->list_prev; | |
310 | tiq_list->list_prev->list_next=q; | |
311 | tiq_list->list_prev=q; | |
312 | } | |
313 | spin_unlock_irqrestore(&ttiq_list_lock,flags); | |
314 | ||
315 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
316 | tiqdio_sched_tl(); | |
317 | return; | |
318 | out_unlock: | |
319 | spin_unlock_irqrestore(&ttiq_list_lock,flags); | |
320 | return; | |
321 | } | |
322 | ||
323 | static inline void | |
324 | qdio_mark_q(struct qdio_q *q) | |
325 | { | |
326 | QDIO_DBF_TEXT4(0,trace,"mark q"); | |
327 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
328 | ||
329 | if (unlikely(atomic_read(&q->is_in_shutdown))) | |
330 | return; | |
331 | ||
332 | tasklet_schedule(&q->tasklet); | |
333 | } | |
334 | ||
335 | static inline int | |
336 | qdio_stop_polling(struct qdio_q *q) | |
337 | { | |
338 | #ifdef QDIO_USE_PROCESSING_STATE | |
339 | int gsf; | |
340 | ||
341 | if (!atomic_swap(&q->polling,0)) | |
342 | return 1; | |
343 | ||
344 | QDIO_DBF_TEXT4(0,trace,"stoppoll"); | |
345 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
346 | ||
347 | /* show the card that we are not polling anymore */ | |
348 | if (!q->is_input_q) | |
349 | return 1; | |
350 | ||
351 | gsf=GET_SAVED_FRONTIER(q); | |
352 | set_slsb(&q->slsb.acc.val[(gsf+QDIO_MAX_BUFFERS_PER_Q-1)& | |
353 | (QDIO_MAX_BUFFERS_PER_Q-1)], | |
354 | SLSB_P_INPUT_NOT_INIT); | |
355 | /* | |
356 | * we don't issue this SYNC_MEMORY, as we trust Rick T and | |
357 | * moreover will not use the PROCESSING state under VM, so | |
358 | * q->polling was 0 anyway | |
359 | */ | |
360 | /*SYNC_MEMORY;*/ | |
361 | if (q->slsb.acc.val[gsf]!=SLSB_P_INPUT_PRIMED) | |
362 | return 1; | |
363 | /* | |
364 | * set our summary bit again, as otherwise there is a | |
365 | * small window we can miss between resetting it and | |
366 | * checking for PRIMED state | |
367 | */ | |
368 | if (q->is_thinint_q) | |
369 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
370 | return 0; | |
371 | ||
372 | #else /* QDIO_USE_PROCESSING_STATE */ | |
373 | return 1; | |
374 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
375 | } | |
376 | ||
377 | /* | |
378 | * see the comment in do_QDIO and before qdio_reserve_q about the | |
379 | * sophisticated locking outside of unmark_q, so that we don't need to | |
380 | * disable the interrupts :-) | |
381 | */ | |
382 | static inline void | |
383 | qdio_unmark_q(struct qdio_q *q) | |
384 | { | |
385 | unsigned long flags; | |
386 | ||
387 | QDIO_DBF_TEXT4(0,trace,"unmark q"); | |
388 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
389 | ||
390 | if ((!q->list_prev)||(!q->list_next)) | |
391 | return; | |
392 | ||
393 | if ((q->is_thinint_q)&&(q->is_input_q)) { | |
394 | /* iQDIO */ | |
395 | spin_lock_irqsave(&ttiq_list_lock,flags); | |
396 | /* in case cleanup has done this already and simultanously | |
397 | * qdio_unmark_q is called from the interrupt handler, we've | |
398 | * got to check this in this specific case again */ | |
399 | if ((!q->list_prev)||(!q->list_next)) | |
400 | goto out; | |
401 | if (q->list_next==q) { | |
402 | /* q was the only interesting q */ | |
403 | tiq_list=NULL; | |
404 | q->list_next=NULL; | |
405 | q->list_prev=NULL; | |
406 | } else { | |
407 | q->list_next->list_prev=q->list_prev; | |
408 | q->list_prev->list_next=q->list_next; | |
409 | tiq_list=q->list_next; | |
410 | q->list_next=NULL; | |
411 | q->list_prev=NULL; | |
412 | } | |
413 | out: | |
414 | spin_unlock_irqrestore(&ttiq_list_lock,flags); | |
415 | } | |
416 | } | |
417 | ||
418 | static inline unsigned long | |
419 | tiqdio_clear_global_summary(void) | |
420 | { | |
421 | unsigned long time; | |
422 | ||
423 | QDIO_DBF_TEXT5(0,trace,"clrglobl"); | |
424 | ||
425 | time = do_clear_global_summary(); | |
426 | ||
427 | QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long)); | |
428 | ||
429 | return time; | |
430 | } | |
431 | ||
432 | ||
433 | /************************* OUTBOUND ROUTINES *******************************/ | |
434 | ||
77933d72 | 435 | static inline int |
1da177e4 LT |
436 | qdio_get_outbound_buffer_frontier(struct qdio_q *q) |
437 | { | |
438 | int f,f_mod_no; | |
439 | volatile char *slsb; | |
440 | int first_not_to_check; | |
441 | char dbf_text[15]; | |
442 | ||
443 | QDIO_DBF_TEXT4(0,trace,"getobfro"); | |
444 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
445 | ||
446 | slsb=&q->slsb.acc.val[0]; | |
447 | f_mod_no=f=q->first_to_check; | |
448 | /* | |
449 | * f points to already processed elements, so f+no_used is correct... | |
450 | * ... but: we don't check 128 buffers, as otherwise | |
451 | * qdio_has_outbound_q_moved would return 0 | |
452 | */ | |
453 | first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used), | |
454 | (QDIO_MAX_BUFFERS_PER_Q-1)); | |
455 | ||
456 | if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis)) | |
457 | SYNC_MEMORY; | |
458 | ||
459 | check_next: | |
460 | if (f==first_not_to_check) | |
461 | goto out; | |
462 | ||
463 | switch(slsb[f_mod_no]) { | |
464 | ||
465 | /* the adapter has not fetched the output yet */ | |
466 | case SLSB_CU_OUTPUT_PRIMED: | |
467 | QDIO_DBF_TEXT5(0,trace,"outpprim"); | |
468 | break; | |
469 | ||
470 | /* the adapter got it */ | |
471 | case SLSB_P_OUTPUT_EMPTY: | |
472 | atomic_dec(&q->number_of_buffers_used); | |
473 | f++; | |
474 | f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1); | |
475 | QDIO_DBF_TEXT5(0,trace,"outpempt"); | |
476 | goto check_next; | |
477 | ||
478 | case SLSB_P_OUTPUT_ERROR: | |
479 | QDIO_DBF_TEXT3(0,trace,"outperr"); | |
480 | sprintf(dbf_text,"%x-%x-%x",f_mod_no, | |
481 | q->sbal[f_mod_no]->element[14].sbalf.value, | |
482 | q->sbal[f_mod_no]->element[15].sbalf.value); | |
483 | QDIO_DBF_TEXT3(1,trace,dbf_text); | |
484 | QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256); | |
485 | ||
486 | /* kind of process the buffer */ | |
487 | set_slsb(&q->slsb.acc.val[f_mod_no], SLSB_P_OUTPUT_NOT_INIT); | |
488 | ||
489 | /* | |
490 | * we increment the frontier, as this buffer | |
491 | * was processed obviously | |
492 | */ | |
493 | atomic_dec(&q->number_of_buffers_used); | |
494 | f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
495 | ||
496 | if (q->qdio_error) | |
497 | q->error_status_flags|= | |
498 | QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR; | |
499 | q->qdio_error=SLSB_P_OUTPUT_ERROR; | |
500 | q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR; | |
501 | ||
502 | break; | |
503 | ||
504 | /* no new buffers */ | |
505 | default: | |
506 | QDIO_DBF_TEXT5(0,trace,"outpni"); | |
507 | } | |
508 | out: | |
509 | return (q->first_to_check=f_mod_no); | |
510 | } | |
511 | ||
512 | /* all buffers are processed */ | |
77933d72 | 513 | static inline int |
1da177e4 LT |
514 | qdio_is_outbound_q_done(struct qdio_q *q) |
515 | { | |
516 | int no_used; | |
517 | #ifdef CONFIG_QDIO_DEBUG | |
518 | char dbf_text[15]; | |
519 | #endif | |
520 | ||
521 | no_used=atomic_read(&q->number_of_buffers_used); | |
522 | ||
523 | #ifdef CONFIG_QDIO_DEBUG | |
524 | if (no_used) { | |
525 | sprintf(dbf_text,"oqisnt%02x",no_used); | |
526 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
527 | } else { | |
528 | QDIO_DBF_TEXT4(0,trace,"oqisdone"); | |
529 | } | |
530 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
531 | #endif /* CONFIG_QDIO_DEBUG */ | |
532 | return (no_used==0); | |
533 | } | |
534 | ||
77933d72 | 535 | static inline int |
1da177e4 LT |
536 | qdio_has_outbound_q_moved(struct qdio_q *q) |
537 | { | |
538 | int i; | |
539 | ||
540 | i=qdio_get_outbound_buffer_frontier(q); | |
541 | ||
542 | if ( (i!=GET_SAVED_FRONTIER(q)) || | |
543 | (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) { | |
544 | SAVE_FRONTIER(q,i); | |
545 | QDIO_DBF_TEXT4(0,trace,"oqhasmvd"); | |
546 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
547 | return 1; | |
548 | } else { | |
549 | QDIO_DBF_TEXT4(0,trace,"oqhsntmv"); | |
550 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
551 | return 0; | |
552 | } | |
553 | } | |
554 | ||
77933d72 | 555 | static inline void |
1da177e4 LT |
556 | qdio_kick_outbound_q(struct qdio_q *q) |
557 | { | |
558 | int result; | |
559 | #ifdef CONFIG_QDIO_DEBUG | |
560 | char dbf_text[15]; | |
561 | ||
562 | QDIO_DBF_TEXT4(0,trace,"kickoutq"); | |
563 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
564 | #endif /* CONFIG_QDIO_DEBUG */ | |
565 | ||
566 | if (!q->siga_out) | |
567 | return; | |
568 | ||
569 | /* here's the story with cc=2 and busy bit set (thanks, Rick): | |
570 | * VM's CP could present us cc=2 and busy bit set on SIGA-write | |
571 | * during reconfiguration of their Guest LAN (only in HIPERS mode, | |
572 | * QDIO mode is asynchronous -- cc=2 and busy bit there will take | |
573 | * the queues down immediately; and not being under VM we have a | |
574 | * problem on cc=2 and busy bit set right away). | |
575 | * | |
576 | * Therefore qdio_siga_output will try for a short time constantly, | |
577 | * if such a condition occurs. If it doesn't change, it will | |
578 | * increase the busy_siga_counter and save the timestamp, and | |
579 | * schedule the queue for later processing (via mark_q, using the | |
580 | * queue tasklet). __qdio_outbound_processing will check out the | |
581 | * counter. If non-zero, it will call qdio_kick_outbound_q as often | |
582 | * as the value of the counter. This will attempt further SIGA | |
583 | * instructions. For each successful SIGA, the counter is | |
584 | * decreased, for failing SIGAs the counter remains the same, after | |
585 | * all. | |
586 | * After some time of no movement, qdio_kick_outbound_q will | |
587 | * finally fail and reflect corresponding error codes to call | |
588 | * the upper layer module and have it take the queues down. | |
589 | * | |
590 | * Note that this is a change from the original HiperSockets design | |
591 | * (saying cc=2 and busy bit means take the queues down), but in | |
592 | * these days Guest LAN didn't exist... excessive cc=2 with busy bit | |
593 | * conditions will still take the queues down, but the threshold is | |
594 | * higher due to the Guest LAN environment. | |
595 | */ | |
596 | ||
597 | ||
598 | result=qdio_siga_output(q); | |
599 | ||
600 | switch (result) { | |
601 | case 0: | |
602 | /* went smooth this time, reset timestamp */ | |
603 | #ifdef CONFIG_QDIO_DEBUG | |
604 | QDIO_DBF_TEXT3(0,trace,"cc2reslv"); | |
605 | sprintf(dbf_text,"%4x%2x%2x",q->irq,q->q_no, | |
606 | atomic_read(&q->busy_siga_counter)); | |
607 | QDIO_DBF_TEXT3(0,trace,dbf_text); | |
608 | #endif /* CONFIG_QDIO_DEBUG */ | |
609 | q->timing.busy_start=0; | |
610 | break; | |
611 | case (2|QDIO_SIGA_ERROR_B_BIT_SET): | |
612 | /* cc=2 and busy bit: */ | |
613 | atomic_inc(&q->busy_siga_counter); | |
614 | ||
615 | /* if the last siga was successful, save | |
616 | * timestamp here */ | |
617 | if (!q->timing.busy_start) | |
618 | q->timing.busy_start=NOW; | |
619 | ||
620 | /* if we're in time, don't touch error_status_flags | |
621 | * and siga_error */ | |
622 | if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) { | |
623 | qdio_mark_q(q); | |
624 | break; | |
625 | } | |
626 | QDIO_DBF_TEXT2(0,trace,"cc2REPRT"); | |
627 | #ifdef CONFIG_QDIO_DEBUG | |
628 | sprintf(dbf_text,"%4x%2x%2x",q->irq,q->q_no, | |
629 | atomic_read(&q->busy_siga_counter)); | |
630 | QDIO_DBF_TEXT3(0,trace,dbf_text); | |
631 | #endif /* CONFIG_QDIO_DEBUG */ | |
632 | /* else fallthrough and report error */ | |
633 | default: | |
634 | /* for plain cc=1, 2 or 3: */ | |
635 | if (q->siga_error) | |
636 | q->error_status_flags|= | |
637 | QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR; | |
638 | q->error_status_flags|= | |
639 | QDIO_STATUS_LOOK_FOR_ERROR; | |
640 | q->siga_error=result; | |
641 | } | |
642 | } | |
643 | ||
77933d72 | 644 | static inline void |
1da177e4 LT |
645 | qdio_kick_outbound_handler(struct qdio_q *q) |
646 | { | |
647 | int start, end, real_end, count; | |
648 | #ifdef CONFIG_QDIO_DEBUG | |
649 | char dbf_text[15]; | |
650 | #endif | |
651 | ||
652 | start = q->first_element_to_kick; | |
653 | /* last_move_ftc was just updated */ | |
654 | real_end = GET_SAVED_FRONTIER(q); | |
655 | end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)& | |
656 | (QDIO_MAX_BUFFERS_PER_Q-1); | |
657 | count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)& | |
658 | (QDIO_MAX_BUFFERS_PER_Q-1); | |
659 | ||
660 | #ifdef CONFIG_QDIO_DEBUG | |
661 | QDIO_DBF_TEXT4(0,trace,"kickouth"); | |
662 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
663 | ||
664 | sprintf(dbf_text,"s=%2xc=%2x",start,count); | |
665 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
666 | #endif /* CONFIG_QDIO_DEBUG */ | |
667 | ||
668 | if (q->state==QDIO_IRQ_STATE_ACTIVE) | |
669 | q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT| | |
670 | q->error_status_flags, | |
671 | q->qdio_error,q->siga_error,q->q_no,start,count, | |
672 | q->int_parm); | |
673 | ||
674 | /* for the next time: */ | |
675 | q->first_element_to_kick=real_end; | |
676 | q->qdio_error=0; | |
677 | q->siga_error=0; | |
678 | q->error_status_flags=0; | |
679 | } | |
680 | ||
681 | static inline void | |
682 | __qdio_outbound_processing(struct qdio_q *q) | |
683 | { | |
684 | int siga_attempts; | |
685 | ||
686 | QDIO_DBF_TEXT4(0,trace,"qoutproc"); | |
687 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
688 | ||
689 | if (unlikely(qdio_reserve_q(q))) { | |
690 | qdio_release_q(q); | |
691 | #ifdef QDIO_PERFORMANCE_STATS | |
692 | o_p_c++; | |
693 | #endif /* QDIO_PERFORMANCE_STATS */ | |
694 | /* as we're sissies, we'll check next time */ | |
695 | if (likely(!atomic_read(&q->is_in_shutdown))) { | |
696 | qdio_mark_q(q); | |
697 | QDIO_DBF_TEXT4(0,trace,"busy,agn"); | |
698 | } | |
699 | return; | |
700 | } | |
701 | #ifdef QDIO_PERFORMANCE_STATS | |
702 | o_p_nc++; | |
703 | perf_stats.tl_runs++; | |
704 | #endif /* QDIO_PERFORMANCE_STATS */ | |
705 | ||
706 | /* see comment in qdio_kick_outbound_q */ | |
707 | siga_attempts=atomic_read(&q->busy_siga_counter); | |
708 | while (siga_attempts) { | |
709 | atomic_dec(&q->busy_siga_counter); | |
710 | qdio_kick_outbound_q(q); | |
711 | siga_attempts--; | |
712 | } | |
713 | ||
714 | if (qdio_has_outbound_q_moved(q)) | |
715 | qdio_kick_outbound_handler(q); | |
716 | ||
717 | if (q->is_iqdio_q) { | |
718 | /* | |
719 | * for asynchronous queues, we better check, if the fill | |
720 | * level is too high. for synchronous queues, the fill | |
721 | * level will never be that high. | |
722 | */ | |
723 | if (atomic_read(&q->number_of_buffers_used)> | |
724 | IQDIO_FILL_LEVEL_TO_POLL) | |
725 | qdio_mark_q(q); | |
726 | ||
727 | } else if (!q->hydra_gives_outbound_pcis) | |
728 | if (!qdio_is_outbound_q_done(q)) | |
729 | qdio_mark_q(q); | |
730 | ||
731 | qdio_release_q(q); | |
732 | } | |
733 | ||
734 | static void | |
735 | qdio_outbound_processing(struct qdio_q *q) | |
736 | { | |
737 | __qdio_outbound_processing(q); | |
738 | } | |
739 | ||
740 | /************************* INBOUND ROUTINES *******************************/ | |
741 | ||
742 | ||
77933d72 | 743 | static inline int |
1da177e4 LT |
744 | qdio_get_inbound_buffer_frontier(struct qdio_q *q) |
745 | { | |
746 | int f,f_mod_no; | |
747 | volatile char *slsb; | |
748 | int first_not_to_check; | |
749 | #ifdef CONFIG_QDIO_DEBUG | |
750 | char dbf_text[15]; | |
751 | #endif /* CONFIG_QDIO_DEBUG */ | |
752 | #ifdef QDIO_USE_PROCESSING_STATE | |
753 | int last_position=-1; | |
754 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
755 | ||
756 | QDIO_DBF_TEXT4(0,trace,"getibfro"); | |
757 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
758 | ||
759 | slsb=&q->slsb.acc.val[0]; | |
760 | f_mod_no=f=q->first_to_check; | |
761 | /* | |
762 | * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved | |
763 | * would return 0 | |
764 | */ | |
765 | first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used), | |
766 | (QDIO_MAX_BUFFERS_PER_Q-1)); | |
767 | ||
768 | /* | |
769 | * we don't use this one, as a PCI or we after a thin interrupt | |
770 | * will sync the queues | |
771 | */ | |
772 | /* SYNC_MEMORY;*/ | |
773 | ||
774 | check_next: | |
775 | f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1); | |
776 | if (f==first_not_to_check) | |
777 | goto out; | |
778 | switch (slsb[f_mod_no]) { | |
779 | ||
780 | /* CU_EMPTY means frontier is reached */ | |
781 | case SLSB_CU_INPUT_EMPTY: | |
782 | QDIO_DBF_TEXT5(0,trace,"inptempt"); | |
783 | break; | |
784 | ||
785 | /* P_PRIMED means set slsb to P_PROCESSING and move on */ | |
786 | case SLSB_P_INPUT_PRIMED: | |
787 | QDIO_DBF_TEXT5(0,trace,"inptprim"); | |
788 | ||
789 | #ifdef QDIO_USE_PROCESSING_STATE | |
790 | /* | |
791 | * as soon as running under VM, polling the input queues will | |
792 | * kill VM in terms of CP overhead | |
793 | */ | |
794 | if (q->siga_sync) { | |
795 | set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT); | |
796 | } else { | |
797 | /* set the previous buffer to NOT_INIT. The current | |
798 | * buffer will be set to PROCESSING at the end of | |
799 | * this function to avoid further interrupts. */ | |
800 | if (last_position>=0) | |
801 | set_slsb(&slsb[last_position], | |
802 | SLSB_P_INPUT_NOT_INIT); | |
803 | atomic_set(&q->polling,1); | |
804 | last_position=f_mod_no; | |
805 | } | |
806 | #else /* QDIO_USE_PROCESSING_STATE */ | |
807 | set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT); | |
808 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
809 | /* | |
810 | * not needed, as the inbound queue will be synced on the next | |
811 | * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s | |
812 | */ | |
813 | /*SYNC_MEMORY;*/ | |
814 | f++; | |
815 | atomic_dec(&q->number_of_buffers_used); | |
816 | goto check_next; | |
817 | ||
818 | case SLSB_P_INPUT_NOT_INIT: | |
819 | case SLSB_P_INPUT_PROCESSING: | |
820 | QDIO_DBF_TEXT5(0,trace,"inpnipro"); | |
821 | break; | |
822 | ||
823 | /* P_ERROR means frontier is reached, break and report error */ | |
824 | case SLSB_P_INPUT_ERROR: | |
825 | #ifdef CONFIG_QDIO_DEBUG | |
826 | sprintf(dbf_text,"inperr%2x",f_mod_no); | |
827 | QDIO_DBF_TEXT3(1,trace,dbf_text); | |
828 | #endif /* CONFIG_QDIO_DEBUG */ | |
829 | QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256); | |
830 | ||
831 | /* kind of process the buffer */ | |
832 | set_slsb(&slsb[f_mod_no],SLSB_P_INPUT_NOT_INIT); | |
833 | ||
834 | if (q->qdio_error) | |
835 | q->error_status_flags|= | |
836 | QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR; | |
837 | q->qdio_error=SLSB_P_INPUT_ERROR; | |
838 | q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR; | |
839 | ||
840 | /* we increment the frontier, as this buffer | |
841 | * was processed obviously */ | |
842 | f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
843 | atomic_dec(&q->number_of_buffers_used); | |
844 | ||
845 | #ifdef QDIO_USE_PROCESSING_STATE | |
846 | last_position=-1; | |
847 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
848 | ||
849 | break; | |
850 | ||
851 | /* everything else means frontier not changed (HALTED or so) */ | |
852 | default: | |
853 | break; | |
854 | } | |
855 | out: | |
856 | q->first_to_check=f_mod_no; | |
857 | ||
858 | #ifdef QDIO_USE_PROCESSING_STATE | |
859 | if (last_position>=0) | |
860 | set_slsb(&slsb[last_position],SLSB_P_INPUT_PROCESSING); | |
861 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
862 | ||
863 | QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int)); | |
864 | ||
865 | return q->first_to_check; | |
866 | } | |
867 | ||
77933d72 | 868 | static inline int |
1da177e4 LT |
869 | qdio_has_inbound_q_moved(struct qdio_q *q) |
870 | { | |
871 | int i; | |
872 | ||
873 | #ifdef QDIO_PERFORMANCE_STATS | |
874 | static int old_pcis=0; | |
875 | static int old_thinints=0; | |
876 | ||
877 | if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints)) | |
878 | perf_stats.start_time_inbound=NOW; | |
879 | else | |
880 | old_pcis=perf_stats.pcis; | |
881 | #endif /* QDIO_PERFORMANCE_STATS */ | |
882 | ||
883 | i=qdio_get_inbound_buffer_frontier(q); | |
884 | if ( (i!=GET_SAVED_FRONTIER(q)) || | |
885 | (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) { | |
886 | SAVE_FRONTIER(q,i); | |
887 | if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis)) | |
888 | SAVE_TIMESTAMP(q); | |
889 | ||
890 | QDIO_DBF_TEXT4(0,trace,"inhasmvd"); | |
891 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
892 | return 1; | |
893 | } else { | |
894 | QDIO_DBF_TEXT4(0,trace,"inhsntmv"); | |
895 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
896 | return 0; | |
897 | } | |
898 | } | |
899 | ||
900 | /* means, no more buffers to be filled */ | |
77933d72 | 901 | static inline int |
1da177e4 LT |
902 | tiqdio_is_inbound_q_done(struct qdio_q *q) |
903 | { | |
904 | int no_used; | |
905 | #ifdef CONFIG_QDIO_DEBUG | |
906 | char dbf_text[15]; | |
907 | #endif | |
908 | ||
909 | no_used=atomic_read(&q->number_of_buffers_used); | |
910 | ||
911 | /* propagate the change from 82 to 80 through VM */ | |
912 | SYNC_MEMORY; | |
913 | ||
914 | #ifdef CONFIG_QDIO_DEBUG | |
915 | if (no_used) { | |
916 | sprintf(dbf_text,"iqisnt%02x",no_used); | |
917 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
918 | } else { | |
919 | QDIO_DBF_TEXT4(0,trace,"iniqisdo"); | |
920 | } | |
921 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
922 | #endif /* CONFIG_QDIO_DEBUG */ | |
923 | ||
924 | if (!no_used) | |
925 | return 1; | |
926 | ||
927 | if (!q->siga_sync) | |
928 | /* we'll check for more primed buffers in qeth_stop_polling */ | |
929 | return 0; | |
930 | ||
931 | if (q->slsb.acc.val[q->first_to_check]!=SLSB_P_INPUT_PRIMED) | |
932 | /* | |
933 | * nothing more to do, if next buffer is not PRIMED. | |
934 | * note that we did a SYNC_MEMORY before, that there | |
935 | * has been a sychnronization. | |
936 | * we will return 0 below, as there is nothing to do | |
937 | * (stop_polling not necessary, as we have not been | |
938 | * using the PROCESSING state | |
939 | */ | |
940 | return 0; | |
941 | ||
942 | /* | |
943 | * ok, the next input buffer is primed. that means, that device state | |
944 | * change indicator and adapter local summary are set, so we will find | |
945 | * it next time. | |
946 | * we will return 0 below, as there is nothing to do, except scheduling | |
947 | * ourselves for the next time. | |
948 | */ | |
949 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
950 | tiqdio_sched_tl(); | |
951 | return 0; | |
952 | } | |
953 | ||
77933d72 | 954 | static inline int |
1da177e4 LT |
955 | qdio_is_inbound_q_done(struct qdio_q *q) |
956 | { | |
957 | int no_used; | |
958 | #ifdef CONFIG_QDIO_DEBUG | |
959 | char dbf_text[15]; | |
960 | #endif | |
961 | ||
962 | no_used=atomic_read(&q->number_of_buffers_used); | |
963 | ||
964 | /* | |
965 | * we need that one for synchronization with the adapter, as it | |
966 | * does a kind of PCI avoidance | |
967 | */ | |
968 | SYNC_MEMORY; | |
969 | ||
970 | if (!no_used) { | |
971 | QDIO_DBF_TEXT4(0,trace,"inqisdnA"); | |
972 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
973 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
974 | return 1; | |
975 | } | |
976 | ||
977 | if (q->slsb.acc.val[q->first_to_check]==SLSB_P_INPUT_PRIMED) { | |
978 | /* we got something to do */ | |
979 | QDIO_DBF_TEXT4(0,trace,"inqisntA"); | |
980 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
981 | return 0; | |
982 | } | |
983 | ||
984 | /* on VM, we don't poll, so the q is always done here */ | |
985 | if (q->siga_sync) | |
986 | return 1; | |
987 | if (q->hydra_gives_outbound_pcis) | |
988 | return 1; | |
989 | ||
990 | /* | |
991 | * at this point we know, that inbound first_to_check | |
992 | * has (probably) not moved (see qdio_inbound_processing) | |
993 | */ | |
994 | if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) { | |
995 | #ifdef CONFIG_QDIO_DEBUG | |
996 | QDIO_DBF_TEXT4(0,trace,"inqisdon"); | |
997 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
998 | sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used); | |
999 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
1000 | #endif /* CONFIG_QDIO_DEBUG */ | |
1001 | return 1; | |
1002 | } else { | |
1003 | #ifdef CONFIG_QDIO_DEBUG | |
1004 | QDIO_DBF_TEXT4(0,trace,"inqisntd"); | |
1005 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
1006 | sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used); | |
1007 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
1008 | #endif /* CONFIG_QDIO_DEBUG */ | |
1009 | return 0; | |
1010 | } | |
1011 | } | |
1012 | ||
77933d72 | 1013 | static inline void |
1da177e4 LT |
1014 | qdio_kick_inbound_handler(struct qdio_q *q) |
1015 | { | |
1016 | int count, start, end, real_end, i; | |
1017 | #ifdef CONFIG_QDIO_DEBUG | |
1018 | char dbf_text[15]; | |
1019 | #endif | |
1020 | ||
1021 | QDIO_DBF_TEXT4(0,trace,"kickinh"); | |
1022 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
1023 | ||
1024 | start=q->first_element_to_kick; | |
1025 | real_end=q->first_to_check; | |
1026 | end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
1027 | ||
1028 | i=start; | |
1029 | count=0; | |
1030 | while (1) { | |
1031 | count++; | |
1032 | if (i==end) | |
1033 | break; | |
1034 | i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
1035 | } | |
1036 | ||
1037 | #ifdef CONFIG_QDIO_DEBUG | |
1038 | sprintf(dbf_text,"s=%2xc=%2x",start,count); | |
1039 | QDIO_DBF_TEXT4(0,trace,dbf_text); | |
1040 | #endif /* CONFIG_QDIO_DEBUG */ | |
1041 | ||
1042 | if (likely(q->state==QDIO_IRQ_STATE_ACTIVE)) | |
1043 | q->handler(q->cdev, | |
1044 | QDIO_STATUS_INBOUND_INT|q->error_status_flags, | |
1045 | q->qdio_error,q->siga_error,q->q_no,start,count, | |
1046 | q->int_parm); | |
1047 | ||
1048 | /* for the next time: */ | |
1049 | q->first_element_to_kick=real_end; | |
1050 | q->qdio_error=0; | |
1051 | q->siga_error=0; | |
1052 | q->error_status_flags=0; | |
1053 | ||
1054 | #ifdef QDIO_PERFORMANCE_STATS | |
1055 | perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound; | |
1056 | perf_stats.inbound_cnt++; | |
1057 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1058 | } | |
1059 | ||
1060 | static inline void | |
1061 | __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set) | |
1062 | { | |
1063 | struct qdio_irq *irq_ptr; | |
1064 | struct qdio_q *oq; | |
1065 | int i; | |
1066 | ||
1067 | QDIO_DBF_TEXT4(0,trace,"iqinproc"); | |
1068 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
1069 | ||
1070 | /* | |
1071 | * we first want to reserve the q, so that we know, that we don't | |
1072 | * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might | |
1073 | * be set | |
1074 | */ | |
1075 | if (unlikely(qdio_reserve_q(q))) { | |
1076 | qdio_release_q(q); | |
1077 | #ifdef QDIO_PERFORMANCE_STATS | |
1078 | ii_p_c++; | |
1079 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1080 | /* | |
1081 | * as we might just be about to stop polling, we make | |
1082 | * sure that we check again at least once more | |
1083 | */ | |
1084 | tiqdio_sched_tl(); | |
1085 | return; | |
1086 | } | |
1087 | #ifdef QDIO_PERFORMANCE_STATS | |
1088 | ii_p_nc++; | |
1089 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1090 | if (unlikely(atomic_read(&q->is_in_shutdown))) { | |
1091 | qdio_unmark_q(q); | |
1092 | goto out; | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * we reset spare_ind_was_set, when the queue does not use the | |
1097 | * spare indicator | |
1098 | */ | |
1099 | if (spare_ind_was_set) | |
1100 | spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator); | |
1101 | ||
1102 | if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set) | |
1103 | goto out; | |
1104 | /* | |
1105 | * q->dev_st_chg_ind is the indicator, be it shared or not. | |
1106 | * only clear it, if indicator is non-shared | |
1107 | */ | |
1108 | if (!spare_ind_was_set) | |
1109 | tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind); | |
1110 | ||
1111 | if (q->hydra_gives_outbound_pcis) { | |
1112 | if (!q->siga_sync_done_on_thinints) { | |
1113 | SYNC_MEMORY_ALL; | |
1114 | } else if ((!q->siga_sync_done_on_outb_tis)&& | |
1115 | (q->hydra_gives_outbound_pcis)) { | |
1116 | SYNC_MEMORY_ALL_OUTB; | |
1117 | } | |
1118 | } else { | |
1119 | SYNC_MEMORY; | |
1120 | } | |
1121 | /* | |
1122 | * maybe we have to do work on our outbound queues... at least | |
1123 | * we have to check the outbound-int-capable thinint-capable | |
1124 | * queues | |
1125 | */ | |
1126 | if (q->hydra_gives_outbound_pcis) { | |
1127 | irq_ptr = (struct qdio_irq*)q->irq_ptr; | |
1128 | for (i=0;i<irq_ptr->no_output_qs;i++) { | |
1129 | oq = irq_ptr->output_qs[i]; | |
1130 | #ifdef QDIO_PERFORMANCE_STATS | |
1131 | perf_stats.tl_runs--; | |
1132 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1133 | if (!qdio_is_outbound_q_done(oq)) | |
1134 | __qdio_outbound_processing(oq); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | if (!qdio_has_inbound_q_moved(q)) | |
1139 | goto out; | |
1140 | ||
1141 | qdio_kick_inbound_handler(q); | |
1142 | if (tiqdio_is_inbound_q_done(q)) | |
1143 | if (!qdio_stop_polling(q)) { | |
1144 | /* | |
1145 | * we set the flags to get into the stuff next time, | |
1146 | * see also comment in qdio_stop_polling | |
1147 | */ | |
1148 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
1149 | tiqdio_sched_tl(); | |
1150 | } | |
1151 | out: | |
1152 | qdio_release_q(q); | |
1153 | } | |
1154 | ||
1155 | static void | |
1156 | tiqdio_inbound_processing(struct qdio_q *q) | |
1157 | { | |
1158 | __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount)); | |
1159 | } | |
1160 | ||
1161 | static inline void | |
1162 | __qdio_inbound_processing(struct qdio_q *q) | |
1163 | { | |
1164 | int q_laps=0; | |
1165 | ||
1166 | QDIO_DBF_TEXT4(0,trace,"qinproc"); | |
1167 | QDIO_DBF_HEX4(0,trace,&q,sizeof(void*)); | |
1168 | ||
1169 | if (unlikely(qdio_reserve_q(q))) { | |
1170 | qdio_release_q(q); | |
1171 | #ifdef QDIO_PERFORMANCE_STATS | |
1172 | i_p_c++; | |
1173 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1174 | /* as we're sissies, we'll check next time */ | |
1175 | if (likely(!atomic_read(&q->is_in_shutdown))) { | |
1176 | qdio_mark_q(q); | |
1177 | QDIO_DBF_TEXT4(0,trace,"busy,agn"); | |
1178 | } | |
1179 | return; | |
1180 | } | |
1181 | #ifdef QDIO_PERFORMANCE_STATS | |
1182 | i_p_nc++; | |
1183 | perf_stats.tl_runs++; | |
1184 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1185 | ||
1186 | again: | |
1187 | if (qdio_has_inbound_q_moved(q)) { | |
1188 | qdio_kick_inbound_handler(q); | |
1189 | if (!qdio_stop_polling(q)) { | |
1190 | q_laps++; | |
1191 | if (q_laps<QDIO_Q_LAPS) | |
1192 | goto again; | |
1193 | } | |
1194 | qdio_mark_q(q); | |
1195 | } else { | |
1196 | if (!qdio_is_inbound_q_done(q)) | |
1197 | /* means poll time is not yet over */ | |
1198 | qdio_mark_q(q); | |
1199 | } | |
1200 | ||
1201 | qdio_release_q(q); | |
1202 | } | |
1203 | ||
1204 | static void | |
1205 | qdio_inbound_processing(struct qdio_q *q) | |
1206 | { | |
1207 | __qdio_inbound_processing(q); | |
1208 | } | |
1209 | ||
1210 | /************************* MAIN ROUTINES *******************************/ | |
1211 | ||
1212 | #ifdef QDIO_USE_PROCESSING_STATE | |
1213 | static inline int | |
1214 | tiqdio_reset_processing_state(struct qdio_q *q, int q_laps) | |
1215 | { | |
1216 | if (!q) { | |
1217 | tiqdio_sched_tl(); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * under VM, we have not used the PROCESSING state, so no | |
1223 | * need to stop polling | |
1224 | */ | |
1225 | if (q->siga_sync) | |
1226 | return 2; | |
1227 | ||
1228 | if (unlikely(qdio_reserve_q(q))) { | |
1229 | qdio_release_q(q); | |
1230 | #ifdef QDIO_PERFORMANCE_STATS | |
1231 | ii_p_c++; | |
1232 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1233 | /* | |
1234 | * as we might just be about to stop polling, we make | |
1235 | * sure that we check again at least once more | |
1236 | */ | |
1237 | ||
1238 | /* | |
1239 | * sanity -- we'd get here without setting the | |
1240 | * dev st chg ind | |
1241 | */ | |
1242 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
1243 | tiqdio_sched_tl(); | |
1244 | return 0; | |
1245 | } | |
1246 | if (qdio_stop_polling(q)) { | |
1247 | qdio_release_q(q); | |
1248 | return 2; | |
1249 | } | |
1250 | if (q_laps<QDIO_Q_LAPS-1) { | |
1251 | qdio_release_q(q); | |
1252 | return 3; | |
1253 | } | |
1254 | /* | |
1255 | * we set the flags to get into the stuff | |
1256 | * next time, see also comment in qdio_stop_polling | |
1257 | */ | |
1258 | tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind); | |
1259 | tiqdio_sched_tl(); | |
1260 | qdio_release_q(q); | |
1261 | return 1; | |
1262 | ||
1263 | } | |
1264 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
1265 | ||
1266 | static inline void | |
1267 | tiqdio_inbound_checks(void) | |
1268 | { | |
1269 | struct qdio_q *q; | |
1270 | int spare_ind_was_set=0; | |
1271 | #ifdef QDIO_USE_PROCESSING_STATE | |
1272 | int q_laps=0; | |
1273 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
1274 | ||
1275 | QDIO_DBF_TEXT4(0,trace,"iqdinbck"); | |
1276 | QDIO_DBF_TEXT5(0,trace,"iqlocsum"); | |
1277 | ||
1278 | #ifdef QDIO_USE_PROCESSING_STATE | |
1279 | again: | |
1280 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
1281 | ||
1282 | /* when the spare indicator is used and set, save that and clear it */ | |
1283 | if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) { | |
1284 | spare_ind_was_set = 1; | |
1285 | tiqdio_clear_summary_bit((__u32*)&spare_indicator); | |
1286 | } | |
1287 | ||
1288 | q=(struct qdio_q*)tiq_list; | |
1289 | do { | |
1290 | if (!q) | |
1291 | break; | |
1292 | __tiqdio_inbound_processing(q, spare_ind_was_set); | |
1293 | q=(struct qdio_q*)q->list_next; | |
1294 | } while (q!=(struct qdio_q*)tiq_list); | |
1295 | ||
1296 | #ifdef QDIO_USE_PROCESSING_STATE | |
1297 | q=(struct qdio_q*)tiq_list; | |
1298 | do { | |
1299 | int ret; | |
1300 | ||
1301 | ret = tiqdio_reset_processing_state(q, q_laps); | |
1302 | switch (ret) { | |
1303 | case 0: | |
1304 | return; | |
1305 | case 1: | |
1306 | q_laps++; | |
1307 | case 2: | |
1308 | q = (struct qdio_q*)q->list_next; | |
1309 | break; | |
1310 | default: | |
1311 | q_laps++; | |
1312 | goto again; | |
1313 | } | |
1314 | } while (q!=(struct qdio_q*)tiq_list); | |
1315 | #endif /* QDIO_USE_PROCESSING_STATE */ | |
1316 | } | |
1317 | ||
1318 | static void | |
1319 | tiqdio_tl(unsigned long data) | |
1320 | { | |
1321 | QDIO_DBF_TEXT4(0,trace,"iqdio_tl"); | |
1322 | ||
1323 | #ifdef QDIO_PERFORMANCE_STATS | |
1324 | perf_stats.tl_runs++; | |
1325 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1326 | ||
1327 | tiqdio_inbound_checks(); | |
1328 | } | |
1329 | ||
1330 | /********************* GENERAL HELPER_ROUTINES ***********************/ | |
1331 | ||
1332 | static void | |
1333 | qdio_release_irq_memory(struct qdio_irq *irq_ptr) | |
1334 | { | |
1335 | int i; | |
1336 | ||
1337 | for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) { | |
1338 | if (!irq_ptr->input_qs[i]) | |
1339 | goto next; | |
1340 | ||
1341 | if (irq_ptr->input_qs[i]->slib) | |
1342 | kfree(irq_ptr->input_qs[i]->slib); | |
1343 | kfree(irq_ptr->input_qs[i]); | |
1344 | ||
1345 | next: | |
1346 | if (!irq_ptr->output_qs[i]) | |
1347 | continue; | |
1348 | ||
1349 | if (irq_ptr->output_qs[i]->slib) | |
1350 | kfree(irq_ptr->output_qs[i]->slib); | |
1351 | kfree(irq_ptr->output_qs[i]); | |
1352 | ||
1353 | } | |
1354 | kfree(irq_ptr->qdr); | |
1355 | kfree(irq_ptr); | |
1356 | } | |
1357 | ||
1358 | static void | |
1359 | qdio_set_impl_params(struct qdio_irq *irq_ptr, | |
1360 | unsigned int qib_param_field_format, | |
1361 | /* pointer to 128 bytes or NULL, if no param field */ | |
1362 | unsigned char *qib_param_field, | |
1363 | /* pointer to no_queues*128 words of data or NULL */ | |
1364 | unsigned int no_input_qs, | |
1365 | unsigned int no_output_qs, | |
1366 | unsigned long *input_slib_elements, | |
1367 | unsigned long *output_slib_elements) | |
1368 | { | |
1369 | int i,j; | |
1370 | ||
1371 | if (!irq_ptr) | |
1372 | return; | |
1373 | ||
1374 | irq_ptr->qib.pfmt=qib_param_field_format; | |
1375 | if (qib_param_field) | |
1376 | memcpy(irq_ptr->qib.parm,qib_param_field, | |
1377 | QDIO_MAX_BUFFERS_PER_Q); | |
1378 | ||
1379 | if (input_slib_elements) | |
1380 | for (i=0;i<no_input_qs;i++) { | |
1381 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1382 | irq_ptr->input_qs[i]->slib->slibe[j].parms= | |
1383 | input_slib_elements[ | |
1384 | i*QDIO_MAX_BUFFERS_PER_Q+j]; | |
1385 | } | |
1386 | if (output_slib_elements) | |
1387 | for (i=0;i<no_output_qs;i++) { | |
1388 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1389 | irq_ptr->output_qs[i]->slib->slibe[j].parms= | |
1390 | output_slib_elements[ | |
1391 | i*QDIO_MAX_BUFFERS_PER_Q+j]; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | static int | |
1396 | qdio_alloc_qs(struct qdio_irq *irq_ptr, | |
1397 | int no_input_qs, int no_output_qs) | |
1398 | { | |
1399 | int i; | |
1400 | struct qdio_q *q; | |
1401 | int result=-ENOMEM; | |
1402 | ||
1403 | for (i=0;i<no_input_qs;i++) { | |
1404 | q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL); | |
1405 | ||
1406 | if (!q) { | |
1407 | QDIO_PRINT_ERR("kmalloc of q failed!\n"); | |
1408 | goto out; | |
1409 | } | |
1410 | ||
1411 | memset(q,0,sizeof(struct qdio_q)); | |
1412 | ||
1413 | q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL); | |
1414 | if (!q->slib) { | |
1415 | QDIO_PRINT_ERR("kmalloc of slib failed!\n"); | |
1416 | goto out; | |
1417 | } | |
1418 | ||
1419 | irq_ptr->input_qs[i]=q; | |
1420 | } | |
1421 | ||
1422 | for (i=0;i<no_output_qs;i++) { | |
1423 | q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL); | |
1424 | ||
1425 | if (!q) { | |
1426 | goto out; | |
1427 | } | |
1428 | ||
1429 | memset(q,0,sizeof(struct qdio_q)); | |
1430 | ||
1431 | q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL); | |
1432 | if (!q->slib) { | |
1433 | QDIO_PRINT_ERR("kmalloc of slib failed!\n"); | |
1434 | goto out; | |
1435 | } | |
1436 | ||
1437 | irq_ptr->output_qs[i]=q; | |
1438 | } | |
1439 | ||
1440 | result=0; | |
1441 | out: | |
1442 | return result; | |
1443 | } | |
1444 | ||
1445 | static void | |
1446 | qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev, | |
1447 | int no_input_qs, int no_output_qs, | |
1448 | qdio_handler_t *input_handler, | |
1449 | qdio_handler_t *output_handler, | |
1450 | unsigned long int_parm,int q_format, | |
1451 | unsigned long flags, | |
1452 | void **inbound_sbals_array, | |
1453 | void **outbound_sbals_array) | |
1454 | { | |
1455 | struct qdio_q *q; | |
1456 | int i,j; | |
1457 | char dbf_text[20]; /* see qdio_initialize */ | |
1458 | void *ptr; | |
1459 | int available; | |
1460 | ||
1461 | sprintf(dbf_text,"qfqs%4x",cdev->private->irq); | |
1462 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
1463 | for (i=0;i<no_input_qs;i++) { | |
1464 | q=irq_ptr->input_qs[i]; | |
1465 | ||
1466 | memset(q,0,((char*)&q->slib)-((char*)q)); | |
1467 | sprintf(dbf_text,"in-q%4x",i); | |
1468 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
1469 | QDIO_DBF_HEX0(0,setup,&q,sizeof(void*)); | |
1470 | ||
1471 | memset(q->slib,0,PAGE_SIZE); | |
1472 | q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2); | |
1473 | ||
1474 | available=0; | |
1475 | ||
1476 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1477 | q->sbal[j]=*(inbound_sbals_array++); | |
1478 | ||
1479 | q->queue_type=q_format; | |
1480 | q->int_parm=int_parm; | |
1481 | q->irq=irq_ptr->irq; | |
1482 | q->irq_ptr = irq_ptr; | |
1483 | q->cdev = cdev; | |
1484 | q->mask=1<<(31-i); | |
1485 | q->q_no=i; | |
1486 | q->is_input_q=1; | |
1487 | q->first_to_check=0; | |
1488 | q->last_move_ftc=0; | |
1489 | q->handler=input_handler; | |
1490 | q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind; | |
1491 | ||
1492 | q->tasklet.data=(unsigned long)q; | |
1493 | /* q->is_thinint_q isn't valid at this time, but | |
1494 | * irq_ptr->is_thinint_irq is */ | |
1495 | q->tasklet.func=(void(*)(unsigned long)) | |
1496 | ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing: | |
1497 | &qdio_inbound_processing); | |
1498 | ||
1499 | /* actually this is not used for inbound queues. yet. */ | |
1500 | atomic_set(&q->busy_siga_counter,0); | |
1501 | q->timing.busy_start=0; | |
1502 | ||
1503 | /* for (j=0;j<QDIO_STATS_NUMBER;j++) | |
1504 | q->timing.last_transfer_times[j]=(qdio_get_micros()/ | |
1505 | QDIO_STATS_NUMBER)*j; | |
1506 | q->timing.last_transfer_index=QDIO_STATS_NUMBER-1; | |
1507 | */ | |
1508 | ||
1509 | /* fill in slib */ | |
1510 | if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba= | |
1511 | (unsigned long)(q->slib); | |
1512 | q->slib->sla=(unsigned long)(q->sl); | |
1513 | q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]); | |
1514 | ||
1515 | /* fill in sl */ | |
1516 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1517 | q->sl->element[j].sbal=(unsigned long)(q->sbal[j]); | |
1518 | ||
1519 | QDIO_DBF_TEXT2(0,setup,"sl-sb-b0"); | |
1520 | ptr=(void*)q->sl; | |
1521 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1522 | ptr=(void*)&q->slsb; | |
1523 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1524 | ptr=(void*)q->sbal[0]; | |
1525 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1526 | ||
1527 | /* fill in slsb */ | |
1528 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) { | |
1529 | set_slsb(&q->slsb.acc.val[j], | |
1530 | SLSB_P_INPUT_NOT_INIT); | |
1531 | /* q->sbal[j]->element[1].sbalf.i1.key=QDIO_STORAGE_KEY;*/ | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | for (i=0;i<no_output_qs;i++) { | |
1536 | q=irq_ptr->output_qs[i]; | |
1537 | memset(q,0,((char*)&q->slib)-((char*)q)); | |
1538 | ||
1539 | sprintf(dbf_text,"outq%4x",i); | |
1540 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
1541 | QDIO_DBF_HEX0(0,setup,&q,sizeof(void*)); | |
1542 | ||
1543 | memset(q->slib,0,PAGE_SIZE); | |
1544 | q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2); | |
1545 | ||
1546 | available=0; | |
1547 | ||
1548 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1549 | q->sbal[j]=*(outbound_sbals_array++); | |
1550 | ||
1551 | q->queue_type=q_format; | |
1552 | q->int_parm=int_parm; | |
1553 | q->is_input_q=0; | |
1554 | q->irq=irq_ptr->irq; | |
1555 | q->cdev = cdev; | |
1556 | q->irq_ptr = irq_ptr; | |
1557 | q->mask=1<<(31-i); | |
1558 | q->q_no=i; | |
1559 | q->first_to_check=0; | |
1560 | q->last_move_ftc=0; | |
1561 | q->handler=output_handler; | |
1562 | ||
1563 | q->tasklet.data=(unsigned long)q; | |
1564 | q->tasklet.func=(void(*)(unsigned long)) | |
1565 | &qdio_outbound_processing; | |
1566 | ||
1567 | atomic_set(&q->busy_siga_counter,0); | |
1568 | q->timing.busy_start=0; | |
1569 | ||
1570 | /* fill in slib */ | |
1571 | if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba= | |
1572 | (unsigned long)(q->slib); | |
1573 | q->slib->sla=(unsigned long)(q->sl); | |
1574 | q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]); | |
1575 | ||
1576 | /* fill in sl */ | |
1577 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) | |
1578 | q->sl->element[j].sbal=(unsigned long)(q->sbal[j]); | |
1579 | ||
1580 | QDIO_DBF_TEXT2(0,setup,"sl-sb-b0"); | |
1581 | ptr=(void*)q->sl; | |
1582 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1583 | ptr=(void*)&q->slsb; | |
1584 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1585 | ptr=(void*)q->sbal[0]; | |
1586 | QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*)); | |
1587 | ||
1588 | /* fill in slsb */ | |
1589 | for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++) { | |
1590 | set_slsb(&q->slsb.acc.val[j], | |
1591 | SLSB_P_OUTPUT_NOT_INIT); | |
1592 | /* q->sbal[j]->element[1].sbalf.i1.key=QDIO_STORAGE_KEY;*/ | |
1593 | } | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | static void | |
1598 | qdio_fill_thresholds(struct qdio_irq *irq_ptr, | |
1599 | unsigned int no_input_qs, | |
1600 | unsigned int no_output_qs, | |
1601 | unsigned int min_input_threshold, | |
1602 | unsigned int max_input_threshold, | |
1603 | unsigned int min_output_threshold, | |
1604 | unsigned int max_output_threshold) | |
1605 | { | |
1606 | int i; | |
1607 | struct qdio_q *q; | |
1608 | ||
1609 | for (i=0;i<no_input_qs;i++) { | |
1610 | q=irq_ptr->input_qs[i]; | |
1611 | q->timing.threshold=max_input_threshold; | |
1612 | /* for (j=0;j<QDIO_STATS_CLASSES;j++) { | |
1613 | q->threshold_classes[j].threshold= | |
1614 | min_input_threshold+ | |
1615 | (max_input_threshold-min_input_threshold)/ | |
1616 | QDIO_STATS_CLASSES; | |
1617 | } | |
1618 | qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/ | |
1619 | } | |
1620 | for (i=0;i<no_output_qs;i++) { | |
1621 | q=irq_ptr->output_qs[i]; | |
1622 | q->timing.threshold=max_output_threshold; | |
1623 | /* for (j=0;j<QDIO_STATS_CLASSES;j++) { | |
1624 | q->threshold_classes[j].threshold= | |
1625 | min_output_threshold+ | |
1626 | (max_output_threshold-min_output_threshold)/ | |
1627 | QDIO_STATS_CLASSES; | |
1628 | } | |
1629 | qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/ | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | static int | |
1634 | tiqdio_thinint_handler(void) | |
1635 | { | |
1636 | QDIO_DBF_TEXT4(0,trace,"thin_int"); | |
1637 | ||
1638 | #ifdef QDIO_PERFORMANCE_STATS | |
1639 | perf_stats.thinints++; | |
1640 | perf_stats.start_time_inbound=NOW; | |
1641 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1642 | ||
1643 | /* SVS only when needed: | |
1644 | * issue SVS to benefit from iqdio interrupt avoidance | |
1645 | * (SVS clears AISOI)*/ | |
1646 | if (!omit_svs) | |
1647 | tiqdio_clear_global_summary(); | |
1648 | ||
1649 | tiqdio_inbound_checks(); | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static void | |
1654 | qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state) | |
1655 | { | |
1656 | int i; | |
1657 | #ifdef CONFIG_QDIO_DEBUG | |
1658 | char dbf_text[15]; | |
1659 | ||
1660 | QDIO_DBF_TEXT5(0,trace,"newstate"); | |
1661 | sprintf(dbf_text,"%4x%4x",irq_ptr->irq,state); | |
1662 | QDIO_DBF_TEXT5(0,trace,dbf_text); | |
1663 | #endif /* CONFIG_QDIO_DEBUG */ | |
1664 | ||
1665 | irq_ptr->state=state; | |
1666 | for (i=0;i<irq_ptr->no_input_qs;i++) | |
1667 | irq_ptr->input_qs[i]->state=state; | |
1668 | for (i=0;i<irq_ptr->no_output_qs;i++) | |
1669 | irq_ptr->output_qs[i]->state=state; | |
1670 | mb(); | |
1671 | } | |
1672 | ||
1673 | static inline void | |
1674 | qdio_irq_check_sense(int irq, struct irb *irb) | |
1675 | { | |
1676 | char dbf_text[15]; | |
1677 | ||
1678 | if (irb->esw.esw0.erw.cons) { | |
1679 | sprintf(dbf_text,"sens%4x",irq); | |
1680 | QDIO_DBF_TEXT2(1,trace,dbf_text); | |
1681 | QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN); | |
1682 | ||
1683 | QDIO_PRINT_WARN("sense data available on qdio channel.\n"); | |
1684 | HEXDUMP16(WARN,"irb: ",irb); | |
1685 | HEXDUMP16(WARN,"sense data: ",irb->ecw); | |
1686 | } | |
1687 | ||
1688 | } | |
1689 | ||
1690 | static inline void | |
1691 | qdio_handle_pci(struct qdio_irq *irq_ptr) | |
1692 | { | |
1693 | int i; | |
1694 | struct qdio_q *q; | |
1695 | ||
1696 | #ifdef QDIO_PERFORMANCE_STATS | |
1697 | perf_stats.pcis++; | |
1698 | perf_stats.start_time_inbound=NOW; | |
1699 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1700 | for (i=0;i<irq_ptr->no_input_qs;i++) { | |
1701 | q=irq_ptr->input_qs[i]; | |
1702 | if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) | |
1703 | qdio_mark_q(q); | |
1704 | else { | |
1705 | #ifdef QDIO_PERFORMANCE_STATS | |
1706 | perf_stats.tl_runs--; | |
1707 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1708 | __qdio_inbound_processing(q); | |
1709 | } | |
1710 | } | |
1711 | if (!irq_ptr->hydra_gives_outbound_pcis) | |
1712 | return; | |
1713 | for (i=0;i<irq_ptr->no_output_qs;i++) { | |
1714 | q=irq_ptr->output_qs[i]; | |
1715 | #ifdef QDIO_PERFORMANCE_STATS | |
1716 | perf_stats.tl_runs--; | |
1717 | #endif /* QDIO_PERFORMANCE_STATS */ | |
1718 | if (qdio_is_outbound_q_done(q)) | |
1719 | continue; | |
1720 | if (!irq_ptr->sync_done_on_outb_pcis) | |
1721 | SYNC_MEMORY; | |
1722 | __qdio_outbound_processing(q); | |
1723 | } | |
1724 | } | |
1725 | ||
1726 | static void qdio_establish_handle_irq(struct ccw_device*, int, int); | |
1727 | ||
1728 | static inline void | |
1729 | qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm, | |
1730 | int cstat, int dstat) | |
1731 | { | |
1732 | struct qdio_irq *irq_ptr; | |
1733 | struct qdio_q *q; | |
1734 | char dbf_text[15]; | |
1735 | ||
1736 | irq_ptr = cdev->private->qdio_data; | |
1737 | ||
1738 | QDIO_DBF_TEXT2(1, trace, "ick2"); | |
1739 | sprintf(dbf_text,"%s", cdev->dev.bus_id); | |
1740 | QDIO_DBF_TEXT2(1,trace,dbf_text); | |
1741 | QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int)); | |
1742 | QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int)); | |
1743 | QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int)); | |
1744 | QDIO_PRINT_ERR("received check condition on activate " \ | |
1745 | "queues on device %s (cs=x%x, ds=x%x).\n", | |
1746 | cdev->dev.bus_id, cstat, dstat); | |
1747 | if (irq_ptr->no_input_qs) { | |
1748 | q=irq_ptr->input_qs[0]; | |
1749 | } else if (irq_ptr->no_output_qs) { | |
1750 | q=irq_ptr->output_qs[0]; | |
1751 | } else { | |
1752 | QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n", | |
1753 | cdev->dev.bus_id); | |
1754 | goto omit_handler_call; | |
1755 | } | |
1756 | q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION| | |
1757 | QDIO_STATUS_LOOK_FOR_ERROR, | |
1758 | 0,0,0,-1,-1,q->int_parm); | |
1759 | omit_handler_call: | |
1760 | qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED); | |
1761 | ||
1762 | } | |
1763 | ||
1764 | static void | |
1765 | qdio_call_shutdown(void *data) | |
1766 | { | |
1767 | struct ccw_device *cdev; | |
1768 | ||
1769 | cdev = (struct ccw_device *)data; | |
1770 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1771 | put_device(&cdev->dev); | |
1772 | } | |
1773 | ||
1774 | static void | |
1775 | qdio_timeout_handler(struct ccw_device *cdev) | |
1776 | { | |
1777 | struct qdio_irq *irq_ptr; | |
1778 | char dbf_text[15]; | |
1779 | ||
1780 | QDIO_DBF_TEXT2(0, trace, "qtoh"); | |
1781 | sprintf(dbf_text, "%s", cdev->dev.bus_id); | |
1782 | QDIO_DBF_TEXT2(0, trace, dbf_text); | |
1783 | ||
1784 | irq_ptr = cdev->private->qdio_data; | |
1785 | sprintf(dbf_text, "state:%d", irq_ptr->state); | |
1786 | QDIO_DBF_TEXT2(0, trace, dbf_text); | |
1787 | ||
1788 | switch (irq_ptr->state) { | |
1789 | case QDIO_IRQ_STATE_INACTIVE: | |
1790 | QDIO_PRINT_ERR("establish queues on irq %04x: timed out\n", | |
1791 | irq_ptr->irq); | |
1792 | QDIO_DBF_TEXT2(1,setup,"eq:timeo"); | |
1793 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
1794 | break; | |
1795 | case QDIO_IRQ_STATE_CLEANUP: | |
1796 | QDIO_PRINT_INFO("Did not get interrupt on cleanup, irq=0x%x.\n", | |
1797 | irq_ptr->irq); | |
1798 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
1799 | break; | |
1800 | case QDIO_IRQ_STATE_ESTABLISHED: | |
1801 | case QDIO_IRQ_STATE_ACTIVE: | |
1802 | /* I/O has been terminated by common I/O layer. */ | |
1803 | QDIO_PRINT_INFO("Queues on irq %04x killed by cio.\n", | |
1804 | irq_ptr->irq); | |
1805 | QDIO_DBF_TEXT2(1, trace, "cio:term"); | |
1806 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); | |
1807 | if (get_device(&cdev->dev)) { | |
1808 | /* Can't call shutdown from interrupt context. */ | |
1809 | PREPARE_WORK(&cdev->private->kick_work, | |
1810 | qdio_call_shutdown, (void *)cdev); | |
1811 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
1812 | } | |
1813 | break; | |
1814 | default: | |
1815 | BUG(); | |
1816 | } | |
1817 | ccw_device_set_timeout(cdev, 0); | |
1818 | wake_up(&cdev->private->wait_q); | |
1819 | } | |
1820 | ||
1821 | static void | |
1822 | qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1823 | { | |
1824 | struct qdio_irq *irq_ptr; | |
1825 | int cstat,dstat; | |
1826 | char dbf_text[15]; | |
1827 | ||
1828 | #ifdef CONFIG_QDIO_DEBUG | |
1829 | QDIO_DBF_TEXT4(0, trace, "qint"); | |
1830 | sprintf(dbf_text, "%s", cdev->dev.bus_id); | |
1831 | QDIO_DBF_TEXT4(0, trace, dbf_text); | |
1832 | #endif /* CONFIG_QDIO_DEBUG */ | |
1833 | ||
1834 | if (!intparm) { | |
1835 | QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \ | |
1836 | "handler, device %s\n", cdev->dev.bus_id); | |
1837 | return; | |
1838 | } | |
1839 | ||
1840 | irq_ptr = cdev->private->qdio_data; | |
1841 | if (!irq_ptr) { | |
1842 | QDIO_DBF_TEXT2(1, trace, "uint"); | |
1843 | sprintf(dbf_text,"%s", cdev->dev.bus_id); | |
1844 | QDIO_DBF_TEXT2(1,trace,dbf_text); | |
1845 | QDIO_PRINT_ERR("received interrupt on unused device %s!\n", | |
1846 | cdev->dev.bus_id); | |
1847 | return; | |
1848 | } | |
1849 | ||
1850 | if (IS_ERR(irb)) { | |
1851 | /* Currently running i/o is in error. */ | |
1852 | switch (PTR_ERR(irb)) { | |
1853 | case -EIO: | |
1854 | QDIO_PRINT_ERR("i/o error on device %s\n", | |
1855 | cdev->dev.bus_id); | |
1856 | return; | |
1857 | case -ETIMEDOUT: | |
1858 | qdio_timeout_handler(cdev); | |
1859 | return; | |
1860 | default: | |
1861 | QDIO_PRINT_ERR("unknown error state %ld on device %s\n", | |
1862 | PTR_ERR(irb), cdev->dev.bus_id); | |
1863 | return; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | qdio_irq_check_sense(irq_ptr->irq, irb); | |
1868 | ||
1869 | #ifdef CONFIG_QDIO_DEBUG | |
1870 | sprintf(dbf_text, "state:%d", irq_ptr->state); | |
1871 | QDIO_DBF_TEXT4(0, trace, dbf_text); | |
1872 | #endif /* CONFIG_QDIO_DEBUG */ | |
1873 | ||
1874 | cstat = irb->scsw.cstat; | |
1875 | dstat = irb->scsw.dstat; | |
1876 | ||
1877 | switch (irq_ptr->state) { | |
1878 | case QDIO_IRQ_STATE_INACTIVE: | |
1879 | qdio_establish_handle_irq(cdev, cstat, dstat); | |
1880 | break; | |
1881 | ||
1882 | case QDIO_IRQ_STATE_CLEANUP: | |
1883 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1884 | break; | |
1885 | ||
1886 | case QDIO_IRQ_STATE_ESTABLISHED: | |
1887 | case QDIO_IRQ_STATE_ACTIVE: | |
1888 | if (cstat & SCHN_STAT_PCI) { | |
1889 | qdio_handle_pci(irq_ptr); | |
1890 | break; | |
1891 | } | |
1892 | ||
1893 | if ((cstat&~SCHN_STAT_PCI)||dstat) { | |
1894 | qdio_handle_activate_check(cdev, intparm, cstat, dstat); | |
1895 | break; | |
1896 | } | |
1897 | default: | |
1898 | QDIO_PRINT_ERR("got interrupt for queues in state %d on " \ | |
1899 | "device %s?!\n", | |
1900 | irq_ptr->state, cdev->dev.bus_id); | |
1901 | } | |
1902 | wake_up(&cdev->private->wait_q); | |
1903 | ||
1904 | } | |
1905 | ||
1906 | int | |
1907 | qdio_synchronize(struct ccw_device *cdev, unsigned int flags, | |
1908 | unsigned int queue_number) | |
1909 | { | |
1910 | int cc; | |
1911 | struct qdio_q *q; | |
1912 | struct qdio_irq *irq_ptr; | |
1913 | void *ptr; | |
1914 | #ifdef CONFIG_QDIO_DEBUG | |
1915 | char dbf_text[15]="SyncXXXX"; | |
1916 | #endif | |
1917 | ||
1918 | irq_ptr = cdev->private->qdio_data; | |
1919 | if (!irq_ptr) | |
1920 | return -ENODEV; | |
1921 | ||
1922 | #ifdef CONFIG_QDIO_DEBUG | |
1923 | *((int*)(&dbf_text[4])) = irq_ptr->irq; | |
1924 | QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN); | |
1925 | *((int*)(&dbf_text[0]))=flags; | |
1926 | *((int*)(&dbf_text[4]))=queue_number; | |
1927 | QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN); | |
1928 | #endif /* CONFIG_QDIO_DEBUG */ | |
1929 | ||
1930 | if (flags&QDIO_FLAG_SYNC_INPUT) { | |
1931 | q=irq_ptr->input_qs[queue_number]; | |
1932 | if (!q) | |
1933 | return -EINVAL; | |
1934 | cc = do_siga_sync(q->irq, 0, q->mask); | |
1935 | } else if (flags&QDIO_FLAG_SYNC_OUTPUT) { | |
1936 | q=irq_ptr->output_qs[queue_number]; | |
1937 | if (!q) | |
1938 | return -EINVAL; | |
1939 | cc = do_siga_sync(q->irq, q->mask, 0); | |
1940 | } else | |
1941 | return -EINVAL; | |
1942 | ||
1943 | ptr=&cc; | |
1944 | if (cc) | |
1945 | QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int)); | |
1946 | ||
1947 | return cc; | |
1948 | } | |
1949 | ||
1950 | static unsigned char | |
1951 | qdio_check_siga_needs(int sch) | |
1952 | { | |
1953 | int result; | |
1954 | unsigned char qdioac; | |
1955 | ||
1956 | struct { | |
1957 | struct chsc_header request; | |
1958 | u16 reserved1; | |
1959 | u16 first_sch; | |
1960 | u16 reserved2; | |
1961 | u16 last_sch; | |
1962 | u32 reserved3; | |
1963 | struct chsc_header response; | |
1964 | u32 reserved4; | |
1965 | u8 flags; | |
1966 | u8 reserved5; | |
1967 | u16 sch; | |
1968 | u8 qfmt; | |
1969 | u8 reserved6; | |
1970 | u8 qdioac; | |
1971 | u8 sch_class; | |
1972 | u8 reserved7; | |
1973 | u8 icnt; | |
1974 | u8 reserved8; | |
1975 | u8 ocnt; | |
1976 | } *ssqd_area; | |
1977 | ||
1978 | ssqd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1979 | if (!ssqd_area) { | |
1980 | QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \ | |
1981 | "SIGAs for sch x%x.\n", sch); | |
1982 | return CHSC_FLAG_SIGA_INPUT_NECESSARY || | |
1983 | CHSC_FLAG_SIGA_OUTPUT_NECESSARY || | |
1984 | CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ | |
1985 | } | |
1986 | ssqd_area->request = (struct chsc_header) { | |
1987 | .length = 0x0010, | |
1988 | .code = 0x0024, | |
1989 | }; | |
1990 | ||
1991 | ssqd_area->first_sch = sch; | |
1992 | ssqd_area->last_sch = sch; | |
1993 | ||
1994 | result=chsc(ssqd_area); | |
1995 | ||
1996 | if (result) { | |
1997 | QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \ | |
1998 | "SIGAs for sch x%x.\n", | |
1999 | result,sch); | |
2000 | qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY || | |
2001 | CHSC_FLAG_SIGA_OUTPUT_NECESSARY || | |
2002 | CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ | |
2003 | goto out; | |
2004 | } | |
2005 | ||
2006 | if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) { | |
2007 | QDIO_PRINT_WARN("response upon checking SIGA needs " \ | |
2008 | "is 0x%x. Using all SIGAs for sch x%x.\n", | |
2009 | ssqd_area->response.code, sch); | |
2010 | qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY || | |
2011 | CHSC_FLAG_SIGA_OUTPUT_NECESSARY || | |
2012 | CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ | |
2013 | goto out; | |
2014 | } | |
2015 | if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) || | |
2016 | !(ssqd_area->flags & CHSC_FLAG_VALIDITY) || | |
2017 | (ssqd_area->sch != sch)) { | |
2018 | QDIO_PRINT_WARN("huh? problems checking out sch x%x... " \ | |
2019 | "using all SIGAs.\n",sch); | |
2020 | qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY | | |
2021 | CHSC_FLAG_SIGA_OUTPUT_NECESSARY | | |
2022 | CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */ | |
2023 | goto out; | |
2024 | } | |
2025 | ||
2026 | qdioac = ssqd_area->qdioac; | |
2027 | out: | |
2028 | free_page ((unsigned long) ssqd_area); | |
2029 | return qdioac; | |
2030 | } | |
2031 | ||
2032 | static unsigned int | |
2033 | tiqdio_check_chsc_availability(void) | |
2034 | { | |
2035 | char dbf_text[15]; | |
2036 | ||
2037 | if (!css_characteristics_avail) | |
2038 | return -EIO; | |
2039 | ||
2040 | /* Check for bit 41. */ | |
2041 | if (!css_general_characteristics.aif) { | |
2042 | QDIO_PRINT_WARN("Adapter interruption facility not " \ | |
2043 | "installed.\n"); | |
2044 | return -ENOENT; | |
2045 | } | |
2046 | ||
2047 | /* Check for bits 107 and 108. */ | |
2048 | if (!css_chsc_characteristics.scssc || | |
2049 | !css_chsc_characteristics.scsscf) { | |
2050 | QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \ | |
2051 | "not available.\n"); | |
2052 | return -ENOENT; | |
2053 | } | |
2054 | ||
2055 | /* Check for OSA/FCP thin interrupts (bit 67). */ | |
2056 | hydra_thinints = css_general_characteristics.aif_osa; | |
2057 | sprintf(dbf_text,"hydrati%1x", hydra_thinints); | |
2058 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2059 | ||
2060 | /* Check for aif time delay disablement fac (bit 56). If installed, | |
2061 | * omit svs even under lpar (good point by rick again) */ | |
2062 | omit_svs = css_general_characteristics.aif_tdd; | |
2063 | sprintf(dbf_text,"omitsvs%1x", omit_svs); | |
2064 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | ||
2069 | static unsigned int | |
2070 | tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero) | |
2071 | { | |
2072 | unsigned long real_addr_local_summary_bit; | |
2073 | unsigned long real_addr_dev_st_chg_ind; | |
2074 | void *ptr; | |
2075 | char dbf_text[15]; | |
2076 | ||
2077 | unsigned int resp_code; | |
2078 | int result; | |
2079 | ||
2080 | struct { | |
2081 | struct chsc_header request; | |
2082 | u16 operation_code; | |
2083 | u16 reserved1; | |
2084 | u32 reserved2; | |
2085 | u32 reserved3; | |
2086 | u64 summary_indicator_addr; | |
2087 | u64 subchannel_indicator_addr; | |
2088 | u32 ks:4; | |
2089 | u32 kc:4; | |
2090 | u32 reserved4:21; | |
2091 | u32 isc:3; | |
2092 | u32 word_with_d_bit; | |
2093 | /* set to 0x10000000 to enable | |
2094 | * time delay disablement facility */ | |
2095 | u32 reserved5; | |
2096 | u32 subsystem_id; | |
2097 | u32 reserved6[1004]; | |
2098 | struct chsc_header response; | |
2099 | u32 reserved7; | |
2100 | } *scssc_area; | |
2101 | ||
2102 | if (!irq_ptr->is_thinint_irq) | |
2103 | return -ENODEV; | |
2104 | ||
2105 | if (reset_to_zero) { | |
2106 | real_addr_local_summary_bit=0; | |
2107 | real_addr_dev_st_chg_ind=0; | |
2108 | } else { | |
2109 | real_addr_local_summary_bit= | |
2110 | virt_to_phys((volatile void *)indicators); | |
2111 | real_addr_dev_st_chg_ind= | |
2112 | virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind); | |
2113 | } | |
2114 | ||
2115 | scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
2116 | if (!scssc_area) { | |
2117 | QDIO_PRINT_WARN("No memory for setting indicators on " \ | |
2118 | "subchannel x%x.\n", irq_ptr->irq); | |
2119 | return -ENOMEM; | |
2120 | } | |
2121 | scssc_area->request = (struct chsc_header) { | |
2122 | .length = 0x0fe0, | |
2123 | .code = 0x0021, | |
2124 | }; | |
2125 | scssc_area->operation_code = 0; | |
2126 | ||
2127 | scssc_area->summary_indicator_addr = real_addr_local_summary_bit; | |
2128 | scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind; | |
2129 | scssc_area->ks = QDIO_STORAGE_KEY; | |
2130 | scssc_area->kc = QDIO_STORAGE_KEY; | |
2131 | scssc_area->isc = TIQDIO_THININT_ISC; | |
2132 | scssc_area->subsystem_id = (1<<16) + irq_ptr->irq; | |
2133 | /* enables the time delay disablement facility. Don't care | |
2134 | * whether it is really there (i.e. we haven't checked for | |
2135 | * it) */ | |
2136 | if (css_general_characteristics.aif_tdd) | |
2137 | scssc_area->word_with_d_bit = 0x10000000; | |
2138 | else | |
2139 | QDIO_PRINT_WARN("Time delay disablement facility " \ | |
2140 | "not available\n"); | |
2141 | ||
2142 | ||
2143 | ||
2144 | result = chsc(scssc_area); | |
2145 | if (result) { | |
2146 | QDIO_PRINT_WARN("could not set indicators on irq x%x, " \ | |
2147 | "cc=%i.\n",irq_ptr->irq,result); | |
2148 | result = -EIO; | |
2149 | goto out; | |
2150 | } | |
2151 | ||
2152 | resp_code = scssc_area->response.code; | |
2153 | if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) { | |
2154 | QDIO_PRINT_WARN("response upon setting indicators " \ | |
2155 | "is 0x%x.\n",resp_code); | |
2156 | sprintf(dbf_text,"sidR%4x",resp_code); | |
2157 | QDIO_DBF_TEXT1(0,trace,dbf_text); | |
2158 | QDIO_DBF_TEXT1(0,setup,dbf_text); | |
2159 | ptr=&scssc_area->response; | |
2160 | QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN); | |
2161 | result = -EIO; | |
2162 | goto out; | |
2163 | } | |
2164 | ||
2165 | QDIO_DBF_TEXT2(0,setup,"setscind"); | |
2166 | QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit, | |
2167 | sizeof(unsigned long)); | |
2168 | QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long)); | |
2169 | result = 0; | |
2170 | out: | |
2171 | free_page ((unsigned long) scssc_area); | |
2172 | return result; | |
2173 | ||
2174 | } | |
2175 | ||
2176 | static unsigned int | |
2177 | tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target) | |
2178 | { | |
2179 | unsigned int resp_code; | |
2180 | int result; | |
2181 | void *ptr; | |
2182 | char dbf_text[15]; | |
2183 | ||
2184 | struct { | |
2185 | struct chsc_header request; | |
2186 | u16 operation_code; | |
2187 | u16 reserved1; | |
2188 | u32 reserved2; | |
2189 | u32 reserved3; | |
2190 | u32 reserved4[2]; | |
2191 | u32 delay_target; | |
2192 | u32 reserved5[1009]; | |
2193 | struct chsc_header response; | |
2194 | u32 reserved6; | |
2195 | } *scsscf_area; | |
2196 | ||
2197 | if (!irq_ptr->is_thinint_irq) | |
2198 | return -ENODEV; | |
2199 | ||
2200 | scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
2201 | if (!scsscf_area) { | |
2202 | QDIO_PRINT_WARN("No memory for setting delay target on " \ | |
2203 | "subchannel x%x.\n", irq_ptr->irq); | |
2204 | return -ENOMEM; | |
2205 | } | |
2206 | scsscf_area->request = (struct chsc_header) { | |
2207 | .length = 0x0fe0, | |
2208 | .code = 0x1027, | |
2209 | }; | |
2210 | ||
2211 | scsscf_area->delay_target = delay_target<<16; | |
2212 | ||
2213 | result=chsc(scsscf_area); | |
2214 | if (result) { | |
2215 | QDIO_PRINT_WARN("could not set delay target on irq x%x, " \ | |
2216 | "cc=%i. Continuing.\n",irq_ptr->irq,result); | |
2217 | result = -EIO; | |
2218 | goto out; | |
2219 | } | |
2220 | ||
2221 | resp_code = scsscf_area->response.code; | |
2222 | if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) { | |
2223 | QDIO_PRINT_WARN("response upon setting delay target " \ | |
2224 | "is 0x%x. Continuing.\n",resp_code); | |
2225 | sprintf(dbf_text,"sdtR%4x",resp_code); | |
2226 | QDIO_DBF_TEXT1(0,trace,dbf_text); | |
2227 | QDIO_DBF_TEXT1(0,setup,dbf_text); | |
2228 | ptr=&scsscf_area->response; | |
2229 | QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN); | |
2230 | } | |
2231 | QDIO_DBF_TEXT2(0,trace,"delytrgt"); | |
2232 | QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long)); | |
2233 | result = 0; /* not critical */ | |
2234 | out: | |
2235 | free_page ((unsigned long) scsscf_area); | |
2236 | return result; | |
2237 | } | |
2238 | ||
2239 | int | |
2240 | qdio_cleanup(struct ccw_device *cdev, int how) | |
2241 | { | |
2242 | struct qdio_irq *irq_ptr; | |
2243 | char dbf_text[15]; | |
2244 | int rc; | |
2245 | ||
2246 | irq_ptr = cdev->private->qdio_data; | |
2247 | if (!irq_ptr) | |
2248 | return -ENODEV; | |
2249 | ||
2250 | sprintf(dbf_text,"qcln%4x",irq_ptr->irq); | |
2251 | QDIO_DBF_TEXT1(0,trace,dbf_text); | |
2252 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2253 | ||
2254 | rc = qdio_shutdown(cdev, how); | |
2255 | if ((rc == 0) || (rc == -EINPROGRESS)) | |
2256 | rc = qdio_free(cdev); | |
2257 | return rc; | |
2258 | } | |
2259 | ||
2260 | int | |
2261 | qdio_shutdown(struct ccw_device *cdev, int how) | |
2262 | { | |
2263 | struct qdio_irq *irq_ptr; | |
2264 | int i; | |
2265 | int result = 0; | |
2266 | int rc; | |
2267 | unsigned long flags; | |
2268 | int timeout; | |
2269 | char dbf_text[15]; | |
2270 | ||
2271 | irq_ptr = cdev->private->qdio_data; | |
2272 | if (!irq_ptr) | |
2273 | return -ENODEV; | |
2274 | ||
2275 | down(&irq_ptr->setting_up_sema); | |
2276 | ||
2277 | sprintf(dbf_text,"qsqs%4x",irq_ptr->irq); | |
2278 | QDIO_DBF_TEXT1(0,trace,dbf_text); | |
2279 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2280 | ||
2281 | /* mark all qs as uninteresting */ | |
2282 | for (i=0;i<irq_ptr->no_input_qs;i++) | |
2283 | atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1); | |
2284 | ||
2285 | for (i=0;i<irq_ptr->no_output_qs;i++) | |
2286 | atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1); | |
2287 | ||
2288 | tasklet_kill(&tiqdio_tasklet); | |
2289 | ||
2290 | for (i=0;i<irq_ptr->no_input_qs;i++) { | |
2291 | qdio_unmark_q(irq_ptr->input_qs[i]); | |
2292 | tasklet_kill(&irq_ptr->input_qs[i]->tasklet); | |
2293 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
2294 | !atomic_read(&irq_ptr-> | |
2295 | input_qs[i]-> | |
2296 | use_count), | |
2297 | QDIO_NO_USE_COUNT_TIMEOUT); | |
2298 | if (atomic_read(&irq_ptr->input_qs[i]->use_count)) | |
2299 | result=-EINPROGRESS; | |
2300 | } | |
2301 | ||
2302 | for (i=0;i<irq_ptr->no_output_qs;i++) { | |
2303 | tasklet_kill(&irq_ptr->output_qs[i]->tasklet); | |
2304 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
2305 | !atomic_read(&irq_ptr-> | |
2306 | output_qs[i]-> | |
2307 | use_count), | |
2308 | QDIO_NO_USE_COUNT_TIMEOUT); | |
2309 | if (atomic_read(&irq_ptr->output_qs[i]->use_count)) | |
2310 | result=-EINPROGRESS; | |
2311 | } | |
2312 | ||
2313 | /* cleanup subchannel */ | |
2314 | spin_lock_irqsave(get_ccwdev_lock(cdev),flags); | |
2315 | if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) { | |
2316 | rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP); | |
2317 | timeout=QDIO_CLEANUP_CLEAR_TIMEOUT; | |
2318 | } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) { | |
2319 | rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP); | |
2320 | timeout=QDIO_CLEANUP_HALT_TIMEOUT; | |
2321 | } else { /* default behaviour */ | |
2322 | rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP); | |
2323 | timeout=QDIO_CLEANUP_HALT_TIMEOUT; | |
2324 | } | |
2325 | if (rc == -ENODEV) { | |
2326 | /* No need to wait for device no longer present. */ | |
2327 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
2328 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
2329 | } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) { | |
2330 | /* | |
2331 | * Whoever put another handler there, has to cope with the | |
2332 | * interrupt theirself. Might happen if qdio_shutdown was | |
2333 | * called on already shutdown queues, but this shouldn't have | |
2334 | * bad side effects. | |
2335 | */ | |
2336 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
2337 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
2338 | } else if (rc == 0) { | |
2339 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP); | |
2340 | ccw_device_set_timeout(cdev, timeout); | |
2341 | spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags); | |
2342 | ||
2343 | wait_event(cdev->private->wait_q, | |
2344 | irq_ptr->state == QDIO_IRQ_STATE_INACTIVE || | |
2345 | irq_ptr->state == QDIO_IRQ_STATE_ERR); | |
2346 | } else { | |
2347 | QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for " | |
2348 | "device %s\n", result, cdev->dev.bus_id); | |
2349 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
2350 | result = rc; | |
2351 | goto out; | |
2352 | } | |
2353 | if (irq_ptr->is_thinint_irq) { | |
2354 | qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind); | |
2355 | tiqdio_set_subchannel_ind(irq_ptr,1); | |
2356 | /* reset adapter interrupt indicators */ | |
2357 | } | |
2358 | ||
2359 | /* exchange int handlers, if necessary */ | |
2360 | if ((void*)cdev->handler == (void*)qdio_handler) | |
2361 | cdev->handler=irq_ptr->original_int_handler; | |
2362 | ||
2363 | /* Ignore errors. */ | |
2364 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
2365 | ccw_device_set_timeout(cdev, 0); | |
2366 | out: | |
2367 | up(&irq_ptr->setting_up_sema); | |
2368 | return result; | |
2369 | } | |
2370 | ||
2371 | int | |
2372 | qdio_free(struct ccw_device *cdev) | |
2373 | { | |
2374 | struct qdio_irq *irq_ptr; | |
2375 | char dbf_text[15]; | |
2376 | ||
2377 | irq_ptr = cdev->private->qdio_data; | |
2378 | if (!irq_ptr) | |
2379 | return -ENODEV; | |
2380 | ||
2381 | down(&irq_ptr->setting_up_sema); | |
2382 | ||
2383 | sprintf(dbf_text,"qfqs%4x",irq_ptr->irq); | |
2384 | QDIO_DBF_TEXT1(0,trace,dbf_text); | |
2385 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2386 | ||
2387 | cdev->private->qdio_data = 0; | |
2388 | ||
2389 | up(&irq_ptr->setting_up_sema); | |
2390 | ||
2391 | qdio_release_irq_memory(irq_ptr); | |
2392 | module_put(THIS_MODULE); | |
2393 | return 0; | |
2394 | } | |
2395 | ||
2396 | static inline void | |
2397 | qdio_allocate_do_dbf(struct qdio_initialize *init_data) | |
2398 | { | |
2399 | char dbf_text[20]; /* if a printf printed out more than 8 chars */ | |
2400 | ||
2401 | sprintf(dbf_text,"qfmt:%x",init_data->q_format); | |
2402 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2403 | QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8); | |
2404 | sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format); | |
2405 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2406 | QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*)); | |
2407 | QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*)); | |
2408 | QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*)); | |
2409 | sprintf(dbf_text,"miit%4x",init_data->min_input_threshold); | |
2410 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2411 | sprintf(dbf_text,"mait%4x",init_data->max_input_threshold); | |
2412 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2413 | sprintf(dbf_text,"miot%4x",init_data->min_output_threshold); | |
2414 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2415 | sprintf(dbf_text,"maot%4x",init_data->max_output_threshold); | |
2416 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2417 | sprintf(dbf_text,"niq:%4x",init_data->no_input_qs); | |
2418 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2419 | sprintf(dbf_text,"noq:%4x",init_data->no_output_qs); | |
2420 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2421 | QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*)); | |
2422 | QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*)); | |
2423 | QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long)); | |
2424 | QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long)); | |
2425 | QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*)); | |
2426 | QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*)); | |
2427 | } | |
2428 | ||
2429 | static inline void | |
2430 | qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt) | |
2431 | { | |
2432 | irq_ptr->input_qs[i]->is_iqdio_q = iqfmt; | |
2433 | irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq; | |
2434 | ||
2435 | irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib); | |
2436 | ||
2437 | irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl); | |
2438 | ||
2439 | irq_ptr->qdr->qdf0[i].slsba= | |
2440 | (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]); | |
2441 | ||
2442 | irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY; | |
2443 | irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY; | |
2444 | irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY; | |
2445 | irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY; | |
2446 | } | |
2447 | ||
2448 | static inline void | |
2449 | qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i, | |
2450 | int j, int iqfmt) | |
2451 | { | |
2452 | irq_ptr->output_qs[i]->is_iqdio_q = iqfmt; | |
2453 | irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq; | |
2454 | ||
2455 | irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib); | |
2456 | ||
2457 | irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl); | |
2458 | ||
2459 | irq_ptr->qdr->qdf0[i+j].slsba= | |
2460 | (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]); | |
2461 | ||
2462 | irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY; | |
2463 | irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY; | |
2464 | irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY; | |
2465 | irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY; | |
2466 | } | |
2467 | ||
2468 | ||
2469 | static inline void | |
2470 | qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr) | |
2471 | { | |
2472 | int i; | |
2473 | ||
2474 | for (i=0;i<irq_ptr->no_input_qs;i++) { | |
2475 | irq_ptr->input_qs[i]->siga_sync= | |
2476 | irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY; | |
2477 | irq_ptr->input_qs[i]->siga_in= | |
2478 | irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY; | |
2479 | irq_ptr->input_qs[i]->siga_out= | |
2480 | irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY; | |
2481 | irq_ptr->input_qs[i]->siga_sync_done_on_thinints= | |
2482 | irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS; | |
2483 | irq_ptr->input_qs[i]->hydra_gives_outbound_pcis= | |
2484 | irq_ptr->hydra_gives_outbound_pcis; | |
2485 | irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis= | |
2486 | ((irq_ptr->qdioac& | |
2487 | (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS| | |
2488 | CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))== | |
2489 | (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS| | |
2490 | CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS)); | |
2491 | ||
2492 | } | |
2493 | } | |
2494 | ||
2495 | static inline void | |
2496 | qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr) | |
2497 | { | |
2498 | int i; | |
2499 | ||
2500 | for (i=0;i<irq_ptr->no_output_qs;i++) { | |
2501 | irq_ptr->output_qs[i]->siga_sync= | |
2502 | irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY; | |
2503 | irq_ptr->output_qs[i]->siga_in= | |
2504 | irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY; | |
2505 | irq_ptr->output_qs[i]->siga_out= | |
2506 | irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY; | |
2507 | irq_ptr->output_qs[i]->siga_sync_done_on_thinints= | |
2508 | irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS; | |
2509 | irq_ptr->output_qs[i]->hydra_gives_outbound_pcis= | |
2510 | irq_ptr->hydra_gives_outbound_pcis; | |
2511 | irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis= | |
2512 | ((irq_ptr->qdioac& | |
2513 | (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS| | |
2514 | CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))== | |
2515 | (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS| | |
2516 | CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS)); | |
2517 | ||
2518 | } | |
2519 | } | |
2520 | ||
2521 | static inline int | |
2522 | qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat, | |
2523 | int dstat) | |
2524 | { | |
2525 | char dbf_text[15]; | |
2526 | struct qdio_irq *irq_ptr; | |
2527 | ||
2528 | irq_ptr = cdev->private->qdio_data; | |
2529 | ||
2530 | if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) { | |
2531 | sprintf(dbf_text,"ick1%4x",irq_ptr->irq); | |
2532 | QDIO_DBF_TEXT2(1,trace,dbf_text); | |
2533 | QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int)); | |
2534 | QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int)); | |
2535 | QDIO_PRINT_ERR("received check condition on establish " \ | |
2536 | "queues on irq 0x%x (cs=x%x, ds=x%x).\n", | |
2537 | irq_ptr->irq,cstat,dstat); | |
2538 | qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR); | |
2539 | } | |
2540 | ||
2541 | if (!(dstat & DEV_STAT_DEV_END)) { | |
2542 | QDIO_DBF_TEXT2(1,setup,"eq:no de"); | |
2543 | QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat)); | |
2544 | QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat)); | |
2545 | QDIO_PRINT_ERR("establish queues on irq %04x: didn't get " | |
2546 | "device end: dstat=%02x, cstat=%02x\n", | |
2547 | irq_ptr->irq, dstat, cstat); | |
2548 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
2549 | return 1; | |
2550 | } | |
2551 | ||
2552 | if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) { | |
2553 | QDIO_DBF_TEXT2(1,setup,"eq:badio"); | |
2554 | QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat)); | |
2555 | QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat)); | |
2556 | QDIO_PRINT_ERR("establish queues on irq %04x: got " | |
2557 | "the following devstat: dstat=%02x, " | |
2558 | "cstat=%02x\n", | |
2559 | irq_ptr->irq, dstat, cstat); | |
2560 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
2561 | return 1; | |
2562 | } | |
2563 | return 0; | |
2564 | } | |
2565 | ||
2566 | static void | |
2567 | qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat) | |
2568 | { | |
2569 | struct qdio_irq *irq_ptr; | |
2570 | char dbf_text[15]; | |
2571 | ||
2572 | irq_ptr = cdev->private->qdio_data; | |
2573 | ||
2574 | sprintf(dbf_text,"qehi%4x",cdev->private->irq); | |
2575 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2576 | QDIO_DBF_TEXT0(0,trace,dbf_text); | |
2577 | ||
2578 | if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) { | |
2579 | ccw_device_set_timeout(cdev, 0); | |
2580 | return; | |
2581 | } | |
2582 | ||
2583 | qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED); | |
2584 | ccw_device_set_timeout(cdev, 0); | |
2585 | } | |
2586 | ||
2587 | int | |
2588 | qdio_initialize(struct qdio_initialize *init_data) | |
2589 | { | |
2590 | int rc; | |
2591 | char dbf_text[15]; | |
2592 | ||
2593 | sprintf(dbf_text,"qini%4x",init_data->cdev->private->irq); | |
2594 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2595 | QDIO_DBF_TEXT0(0,trace,dbf_text); | |
2596 | ||
2597 | rc = qdio_allocate(init_data); | |
2598 | if (rc == 0) { | |
2599 | rc = qdio_establish(init_data); | |
2600 | if (rc != 0) | |
2601 | qdio_free(init_data->cdev); | |
2602 | } | |
2603 | ||
2604 | return rc; | |
2605 | } | |
2606 | ||
2607 | ||
2608 | int | |
2609 | qdio_allocate(struct qdio_initialize *init_data) | |
2610 | { | |
2611 | struct qdio_irq *irq_ptr; | |
2612 | char dbf_text[15]; | |
2613 | ||
2614 | sprintf(dbf_text,"qalc%4x",init_data->cdev->private->irq); | |
2615 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2616 | QDIO_DBF_TEXT0(0,trace,dbf_text); | |
2617 | if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) || | |
2618 | (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) || | |
2619 | ((init_data->no_input_qs) && (!init_data->input_handler)) || | |
2620 | ((init_data->no_output_qs) && (!init_data->output_handler)) ) | |
2621 | return -EINVAL; | |
2622 | ||
2623 | if (!init_data->input_sbal_addr_array) | |
2624 | return -EINVAL; | |
2625 | ||
2626 | if (!init_data->output_sbal_addr_array) | |
2627 | return -EINVAL; | |
2628 | ||
2629 | qdio_allocate_do_dbf(init_data); | |
2630 | ||
2631 | /* create irq */ | |
2632 | irq_ptr=kmalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA); | |
2633 | ||
2634 | QDIO_DBF_TEXT0(0,setup,"irq_ptr:"); | |
2635 | QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*)); | |
2636 | ||
2637 | if (!irq_ptr) { | |
2638 | QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n"); | |
2639 | return -ENOMEM; | |
2640 | } | |
2641 | ||
2642 | memset(irq_ptr,0,sizeof(struct qdio_irq)); | |
2643 | ||
2644 | init_MUTEX(&irq_ptr->setting_up_sema); | |
2645 | ||
2646 | /* QDR must be in DMA area since CCW data address is only 32 bit */ | |
2647 | irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA); | |
2648 | if (!(irq_ptr->qdr)) { | |
2649 | kfree(irq_ptr); | |
2650 | QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n"); | |
2651 | return -ENOMEM; | |
2652 | } | |
2653 | QDIO_DBF_TEXT0(0,setup,"qdr:"); | |
2654 | QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*)); | |
2655 | ||
2656 | if (qdio_alloc_qs(irq_ptr, | |
2657 | init_data->no_input_qs, | |
2658 | init_data->no_output_qs)) { | |
2659 | qdio_release_irq_memory(irq_ptr); | |
2660 | return -ENOMEM; | |
2661 | } | |
2662 | ||
2663 | init_data->cdev->private->qdio_data = irq_ptr; | |
2664 | ||
2665 | qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE); | |
2666 | ||
2667 | return 0; | |
2668 | } | |
2669 | ||
2670 | int qdio_fill_irq(struct qdio_initialize *init_data) | |
2671 | { | |
2672 | int i; | |
2673 | char dbf_text[15]; | |
2674 | struct ciw *ciw; | |
2675 | int is_iqdio; | |
2676 | struct qdio_irq *irq_ptr; | |
2677 | ||
2678 | irq_ptr = init_data->cdev->private->qdio_data; | |
2679 | ||
2680 | memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr)); | |
2681 | ||
2682 | /* wipes qib.ac, required by ar7063 */ | |
2683 | memset(irq_ptr->qdr,0,sizeof(struct qdr)); | |
2684 | ||
2685 | irq_ptr->int_parm=init_data->int_parm; | |
2686 | ||
2687 | irq_ptr->irq = init_data->cdev->private->irq; | |
2688 | irq_ptr->no_input_qs=init_data->no_input_qs; | |
2689 | irq_ptr->no_output_qs=init_data->no_output_qs; | |
2690 | ||
2691 | if (init_data->q_format==QDIO_IQDIO_QFMT) { | |
2692 | irq_ptr->is_iqdio_irq=1; | |
2693 | irq_ptr->is_thinint_irq=1; | |
2694 | } else { | |
2695 | irq_ptr->is_iqdio_irq=0; | |
2696 | irq_ptr->is_thinint_irq=hydra_thinints; | |
2697 | } | |
2698 | sprintf(dbf_text,"is_i_t%1x%1x", | |
2699 | irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq); | |
2700 | QDIO_DBF_TEXT2(0,setup,dbf_text); | |
2701 | ||
2702 | if (irq_ptr->is_thinint_irq) { | |
2703 | irq_ptr->dev_st_chg_ind=qdio_get_indicator(); | |
2704 | QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*)); | |
2705 | if (!irq_ptr->dev_st_chg_ind) { | |
2706 | QDIO_PRINT_WARN("no indicator location available " \ | |
2707 | "for irq 0x%x\n",irq_ptr->irq); | |
2708 | qdio_release_irq_memory(irq_ptr); | |
2709 | return -ENOBUFS; | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | /* defaults */ | |
2714 | irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD; | |
2715 | irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT; | |
2716 | irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD; | |
2717 | irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT; | |
2718 | ||
2719 | qdio_fill_qs(irq_ptr, init_data->cdev, | |
2720 | init_data->no_input_qs, | |
2721 | init_data->no_output_qs, | |
2722 | init_data->input_handler, | |
2723 | init_data->output_handler,init_data->int_parm, | |
2724 | init_data->q_format,init_data->flags, | |
2725 | init_data->input_sbal_addr_array, | |
2726 | init_data->output_sbal_addr_array); | |
2727 | ||
2728 | if (!try_module_get(THIS_MODULE)) { | |
2729 | QDIO_PRINT_CRIT("try_module_get() failed!\n"); | |
2730 | qdio_release_irq_memory(irq_ptr); | |
2731 | return -EINVAL; | |
2732 | } | |
2733 | ||
2734 | qdio_fill_thresholds(irq_ptr,init_data->no_input_qs, | |
2735 | init_data->no_output_qs, | |
2736 | init_data->min_input_threshold, | |
2737 | init_data->max_input_threshold, | |
2738 | init_data->min_output_threshold, | |
2739 | init_data->max_output_threshold); | |
2740 | ||
2741 | /* fill in qdr */ | |
2742 | irq_ptr->qdr->qfmt=init_data->q_format; | |
2743 | irq_ptr->qdr->iqdcnt=init_data->no_input_qs; | |
2744 | irq_ptr->qdr->oqdcnt=init_data->no_output_qs; | |
2745 | irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */ | |
2746 | irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4; | |
2747 | ||
2748 | irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib; | |
2749 | irq_ptr->qdr->qkey=QDIO_STORAGE_KEY; | |
2750 | ||
2751 | /* fill in qib */ | |
2752 | irq_ptr->qib.qfmt=init_data->q_format; | |
2753 | if (init_data->no_input_qs) | |
2754 | irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib); | |
2755 | if (init_data->no_output_qs) | |
2756 | irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib); | |
2757 | memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8); | |
2758 | ||
2759 | qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format, | |
2760 | init_data->qib_param_field, | |
2761 | init_data->no_input_qs, | |
2762 | init_data->no_output_qs, | |
2763 | init_data->input_slib_elements, | |
2764 | init_data->output_slib_elements); | |
2765 | ||
2766 | /* first input descriptors, then output descriptors */ | |
2767 | is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0; | |
2768 | for (i=0;i<init_data->no_input_qs;i++) | |
2769 | qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio); | |
2770 | ||
2771 | for (i=0;i<init_data->no_output_qs;i++) | |
2772 | qdio_allocate_fill_output_desc(irq_ptr, i, | |
2773 | init_data->no_input_qs, | |
2774 | is_iqdio); | |
2775 | ||
2776 | /* qdr, qib, sls, slsbs, slibs, sbales filled. */ | |
2777 | ||
2778 | /* get qdio commands */ | |
2779 | ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE); | |
2780 | if (!ciw) { | |
2781 | QDIO_DBF_TEXT2(1,setup,"no eq"); | |
2782 | QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. " | |
2783 | "Trying to use default.\n"); | |
2784 | } else | |
2785 | irq_ptr->equeue = *ciw; | |
2786 | ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE); | |
2787 | if (!ciw) { | |
2788 | QDIO_DBF_TEXT2(1,setup,"no aq"); | |
2789 | QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. " | |
2790 | "Trying to use default.\n"); | |
2791 | } else | |
2792 | irq_ptr->aqueue = *ciw; | |
2793 | ||
2794 | /* Set new interrupt handler. */ | |
2795 | irq_ptr->original_int_handler = init_data->cdev->handler; | |
2796 | init_data->cdev->handler = qdio_handler; | |
2797 | ||
2798 | return 0; | |
2799 | } | |
2800 | ||
2801 | int | |
2802 | qdio_establish(struct qdio_initialize *init_data) | |
2803 | { | |
2804 | struct qdio_irq *irq_ptr; | |
2805 | unsigned long saveflags; | |
2806 | int result, result2; | |
2807 | struct ccw_device *cdev; | |
2808 | char dbf_text[20]; | |
2809 | ||
2810 | cdev=init_data->cdev; | |
2811 | irq_ptr = cdev->private->qdio_data; | |
2812 | if (!irq_ptr) | |
2813 | return -EINVAL; | |
2814 | ||
2815 | if (cdev->private->state != DEV_STATE_ONLINE) | |
2816 | return -EINVAL; | |
2817 | ||
2818 | down(&irq_ptr->setting_up_sema); | |
2819 | ||
2820 | qdio_fill_irq(init_data); | |
2821 | ||
2822 | /* the thinint CHSC stuff */ | |
2823 | if (irq_ptr->is_thinint_irq) { | |
2824 | ||
2825 | result = tiqdio_set_subchannel_ind(irq_ptr,0); | |
2826 | if (result) { | |
2827 | up(&irq_ptr->setting_up_sema); | |
2828 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
2829 | return result; | |
2830 | } | |
2831 | tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET); | |
2832 | } | |
2833 | ||
2834 | sprintf(dbf_text,"qest%4x",cdev->private->irq); | |
2835 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
2836 | QDIO_DBF_TEXT0(0,trace,dbf_text); | |
2837 | ||
2838 | /* establish q */ | |
2839 | irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd; | |
2840 | irq_ptr->ccw.flags=CCW_FLAG_SLI; | |
2841 | irq_ptr->ccw.count=irq_ptr->equeue.count; | |
2842 | irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr); | |
2843 | ||
2844 | spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags); | |
2845 | ||
2846 | ccw_device_set_options(cdev, 0); | |
2847 | result=ccw_device_start_timeout(cdev,&irq_ptr->ccw, | |
2848 | QDIO_DOING_ESTABLISH,0, 0, | |
2849 | QDIO_ESTABLISH_TIMEOUT); | |
2850 | if (result) { | |
2851 | result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw, | |
2852 | QDIO_DOING_ESTABLISH,0,0, | |
2853 | QDIO_ESTABLISH_TIMEOUT); | |
2854 | sprintf(dbf_text,"eq:io%4x",result); | |
2855 | QDIO_DBF_TEXT2(1,setup,dbf_text); | |
2856 | if (result2) { | |
2857 | sprintf(dbf_text,"eq:io%4x",result); | |
2858 | QDIO_DBF_TEXT2(1,setup,dbf_text); | |
2859 | } | |
2860 | QDIO_PRINT_WARN("establish queues on irq %04x: do_IO " \ | |
2861 | "returned %i, next try returned %i\n", | |
2862 | irq_ptr->irq,result,result2); | |
2863 | result=result2; | |
2864 | if (result) | |
2865 | ccw_device_set_timeout(cdev, 0); | |
2866 | } | |
2867 | ||
2868 | spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags); | |
2869 | ||
2870 | if (result) { | |
2871 | up(&irq_ptr->setting_up_sema); | |
2872 | qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR); | |
2873 | return result; | |
2874 | } | |
2875 | ||
2876 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
2877 | irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED || | |
2878 | irq_ptr->state == QDIO_IRQ_STATE_ERR, | |
2879 | QDIO_ESTABLISH_TIMEOUT); | |
2880 | ||
2881 | if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED) | |
2882 | result = 0; | |
2883 | else { | |
2884 | up(&irq_ptr->setting_up_sema); | |
2885 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
2886 | return -EIO; | |
2887 | } | |
2888 | ||
2889 | irq_ptr->qdioac=qdio_check_siga_needs(irq_ptr->irq); | |
2890 | /* if this gets set once, we're running under VM and can omit SVSes */ | |
2891 | if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY) | |
2892 | omit_svs=1; | |
2893 | ||
2894 | sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac); | |
2895 | QDIO_DBF_TEXT2(0,setup,dbf_text); | |
2896 | ||
2897 | sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac); | |
2898 | QDIO_DBF_TEXT2(0,setup,dbf_text); | |
2899 | ||
2900 | irq_ptr->hydra_gives_outbound_pcis= | |
2901 | irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED; | |
2902 | irq_ptr->sync_done_on_outb_pcis= | |
2903 | irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS; | |
2904 | ||
2905 | qdio_initialize_set_siga_flags_input(irq_ptr); | |
2906 | qdio_initialize_set_siga_flags_output(irq_ptr); | |
2907 | ||
2908 | up(&irq_ptr->setting_up_sema); | |
2909 | ||
2910 | return result; | |
2911 | ||
2912 | } | |
2913 | ||
2914 | int | |
2915 | qdio_activate(struct ccw_device *cdev, int flags) | |
2916 | { | |
2917 | struct qdio_irq *irq_ptr; | |
2918 | int i,result=0,result2; | |
2919 | unsigned long saveflags; | |
2920 | char dbf_text[20]; /* see qdio_initialize */ | |
2921 | ||
2922 | irq_ptr = cdev->private->qdio_data; | |
2923 | if (!irq_ptr) | |
2924 | return -ENODEV; | |
2925 | ||
2926 | if (cdev->private->state != DEV_STATE_ONLINE) | |
2927 | return -EINVAL; | |
2928 | ||
2929 | down(&irq_ptr->setting_up_sema); | |
2930 | if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) { | |
2931 | result=-EBUSY; | |
2932 | goto out; | |
2933 | } | |
2934 | ||
2935 | sprintf(dbf_text,"qact%4x", irq_ptr->irq); | |
2936 | QDIO_DBF_TEXT2(0,setup,dbf_text); | |
2937 | QDIO_DBF_TEXT2(0,trace,dbf_text); | |
2938 | ||
2939 | /* activate q */ | |
2940 | irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd; | |
2941 | irq_ptr->ccw.flags=CCW_FLAG_SLI; | |
2942 | irq_ptr->ccw.count=irq_ptr->aqueue.count; | |
2943 | irq_ptr->ccw.cda=QDIO_GET_ADDR(0); | |
2944 | ||
2945 | spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags); | |
2946 | ||
2947 | ccw_device_set_timeout(cdev, 0); | |
2948 | ccw_device_set_options(cdev, CCWDEV_REPORT_ALL); | |
2949 | result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE, | |
2950 | 0, DOIO_DENY_PREFETCH); | |
2951 | if (result) { | |
2952 | result2=ccw_device_start(cdev,&irq_ptr->ccw, | |
2953 | QDIO_DOING_ACTIVATE,0,0); | |
2954 | sprintf(dbf_text,"aq:io%4x",result); | |
2955 | QDIO_DBF_TEXT2(1,setup,dbf_text); | |
2956 | if (result2) { | |
2957 | sprintf(dbf_text,"aq:io%4x",result); | |
2958 | QDIO_DBF_TEXT2(1,setup,dbf_text); | |
2959 | } | |
2960 | QDIO_PRINT_WARN("activate queues on irq %04x: do_IO " \ | |
2961 | "returned %i, next try returned %i\n", | |
2962 | irq_ptr->irq,result,result2); | |
2963 | result=result2; | |
2964 | } | |
2965 | ||
2966 | spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags); | |
2967 | if (result) | |
2968 | goto out; | |
2969 | ||
2970 | for (i=0;i<irq_ptr->no_input_qs;i++) { | |
2971 | if (irq_ptr->is_thinint_irq) { | |
2972 | /* | |
2973 | * that way we know, that, if we will get interrupted | |
2974 | * by tiqdio_inbound_processing, qdio_unmark_q will | |
2975 | * not be called | |
2976 | */ | |
2977 | qdio_reserve_q(irq_ptr->input_qs[i]); | |
2978 | qdio_mark_tiq(irq_ptr->input_qs[i]); | |
2979 | qdio_release_q(irq_ptr->input_qs[i]); | |
2980 | } | |
2981 | } | |
2982 | ||
2983 | if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) { | |
2984 | for (i=0;i<irq_ptr->no_input_qs;i++) { | |
2985 | irq_ptr->input_qs[i]->is_input_q|= | |
2986 | QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT; | |
2987 | } | |
2988 | } | |
2989 | ||
2990 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
2991 | ((irq_ptr->state == | |
2992 | QDIO_IRQ_STATE_STOPPED) || | |
2993 | (irq_ptr->state == | |
2994 | QDIO_IRQ_STATE_ERR)), | |
2995 | QDIO_ACTIVATE_TIMEOUT); | |
2996 | ||
2997 | switch (irq_ptr->state) { | |
2998 | case QDIO_IRQ_STATE_STOPPED: | |
2999 | case QDIO_IRQ_STATE_ERR: | |
3000 | up(&irq_ptr->setting_up_sema); | |
3001 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
3002 | down(&irq_ptr->setting_up_sema); | |
3003 | result = -EIO; | |
3004 | break; | |
3005 | default: | |
3006 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE); | |
3007 | result = 0; | |
3008 | } | |
3009 | out: | |
3010 | up(&irq_ptr->setting_up_sema); | |
3011 | ||
3012 | return result; | |
3013 | } | |
3014 | ||
3015 | /* buffers filled forwards again to make Rick happy */ | |
3016 | static inline void | |
3017 | qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx, | |
3018 | unsigned int count, struct qdio_buffer *buffers) | |
3019 | { | |
3020 | for (;;) { | |
3021 | set_slsb(&q->slsb.acc.val[qidx],SLSB_CU_INPUT_EMPTY); | |
3022 | count--; | |
3023 | if (!count) break; | |
3024 | qidx=(qidx+1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
3025 | } | |
3026 | ||
3027 | /* not necessary, as the queues are synced during the SIGA read */ | |
3028 | /*SYNC_MEMORY;*/ | |
3029 | } | |
3030 | ||
3031 | static inline void | |
3032 | qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx, | |
3033 | unsigned int count, struct qdio_buffer *buffers) | |
3034 | { | |
3035 | for (;;) { | |
3036 | set_slsb(&q->slsb.acc.val[qidx],SLSB_CU_OUTPUT_PRIMED); | |
3037 | count--; | |
3038 | if (!count) break; | |
3039 | qidx=(qidx+1)&(QDIO_MAX_BUFFERS_PER_Q-1); | |
3040 | } | |
3041 | ||
3042 | /* SIGA write will sync the queues */ | |
3043 | /*SYNC_MEMORY;*/ | |
3044 | } | |
3045 | ||
3046 | static inline void | |
3047 | do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags, | |
3048 | unsigned int qidx, unsigned int count, | |
3049 | struct qdio_buffer *buffers) | |
3050 | { | |
3051 | int used_elements; | |
3052 | ||
3053 | /* This is the inbound handling of queues */ | |
3054 | used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count; | |
3055 | ||
3056 | qdio_do_qdio_fill_input(q,qidx,count,buffers); | |
3057 | ||
3058 | if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&& | |
3059 | (callflags&QDIO_FLAG_UNDER_INTERRUPT)) | |
3060 | atomic_swap(&q->polling,0); | |
3061 | ||
3062 | if (used_elements) | |
3063 | return; | |
3064 | if (callflags&QDIO_FLAG_DONT_SIGA) | |
3065 | return; | |
3066 | if (q->siga_in) { | |
3067 | int result; | |
3068 | ||
3069 | result=qdio_siga_input(q); | |
3070 | if (result) { | |
3071 | if (q->siga_error) | |
3072 | q->error_status_flags|= | |
3073 | QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR; | |
3074 | q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR; | |
3075 | q->siga_error=result; | |
3076 | } | |
3077 | } | |
3078 | ||
3079 | qdio_mark_q(q); | |
3080 | } | |
3081 | ||
3082 | static inline void | |
3083 | do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags, | |
3084 | unsigned int qidx, unsigned int count, | |
3085 | struct qdio_buffer *buffers) | |
3086 | { | |
3087 | int used_elements; | |
3088 | ||
3089 | /* This is the outbound handling of queues */ | |
3090 | #ifdef QDIO_PERFORMANCE_STATS | |
3091 | perf_stats.start_time_outbound=NOW; | |
3092 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3093 | ||
3094 | qdio_do_qdio_fill_output(q,qidx,count,buffers); | |
3095 | ||
3096 | used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count; | |
3097 | ||
3098 | if (callflags&QDIO_FLAG_DONT_SIGA) { | |
3099 | #ifdef QDIO_PERFORMANCE_STATS | |
3100 | perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound; | |
3101 | perf_stats.outbound_cnt++; | |
3102 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3103 | return; | |
3104 | } | |
3105 | if (q->is_iqdio_q) { | |
3106 | /* one siga for every sbal */ | |
3107 | while (count--) | |
3108 | qdio_kick_outbound_q(q); | |
3109 | ||
3110 | __qdio_outbound_processing(q); | |
3111 | } else { | |
3112 | /* under VM, we do a SIGA sync unconditionally */ | |
3113 | SYNC_MEMORY; | |
3114 | else { | |
3115 | /* | |
3116 | * w/o shadow queues (else branch of | |
3117 | * SYNC_MEMORY :-/ ), we try to | |
3118 | * fast-requeue buffers | |
3119 | */ | |
3120 | if (q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1) | |
3121 | &(QDIO_MAX_BUFFERS_PER_Q-1)]!= | |
3122 | SLSB_CU_OUTPUT_PRIMED) { | |
3123 | qdio_kick_outbound_q(q); | |
3124 | } else { | |
3125 | QDIO_DBF_TEXT3(0,trace, "fast-req"); | |
3126 | #ifdef QDIO_PERFORMANCE_STATS | |
3127 | perf_stats.fast_reqs++; | |
3128 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3129 | } | |
3130 | } | |
3131 | /* | |
3132 | * only marking the q could take too long, | |
3133 | * the upper layer module could do a lot of | |
3134 | * traffic in that time | |
3135 | */ | |
3136 | __qdio_outbound_processing(q); | |
3137 | } | |
3138 | ||
3139 | #ifdef QDIO_PERFORMANCE_STATS | |
3140 | perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound; | |
3141 | perf_stats.outbound_cnt++; | |
3142 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3143 | } | |
3144 | ||
3145 | /* count must be 1 in iqdio */ | |
3146 | int | |
3147 | do_QDIO(struct ccw_device *cdev,unsigned int callflags, | |
3148 | unsigned int queue_number, unsigned int qidx, | |
3149 | unsigned int count,struct qdio_buffer *buffers) | |
3150 | { | |
3151 | struct qdio_irq *irq_ptr; | |
3152 | #ifdef CONFIG_QDIO_DEBUG | |
3153 | char dbf_text[20]; | |
3154 | ||
3155 | sprintf(dbf_text,"doQD%04x",cdev->private->irq); | |
3156 | QDIO_DBF_TEXT3(0,trace,dbf_text); | |
3157 | #endif /* CONFIG_QDIO_DEBUG */ | |
3158 | ||
3159 | if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) || | |
3160 | (count>QDIO_MAX_BUFFERS_PER_Q) || | |
3161 | (queue_number>QDIO_MAX_QUEUES_PER_IRQ) ) | |
3162 | return -EINVAL; | |
3163 | ||
3164 | if (count==0) | |
3165 | return 0; | |
3166 | ||
3167 | irq_ptr = cdev->private->qdio_data; | |
3168 | if (!irq_ptr) | |
3169 | return -ENODEV; | |
3170 | ||
3171 | #ifdef CONFIG_QDIO_DEBUG | |
3172 | if (callflags&QDIO_FLAG_SYNC_INPUT) | |
3173 | QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number], | |
3174 | sizeof(void*)); | |
3175 | else | |
3176 | QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number], | |
3177 | sizeof(void*)); | |
3178 | sprintf(dbf_text,"flag%04x",callflags); | |
3179 | QDIO_DBF_TEXT3(0,trace,dbf_text); | |
3180 | sprintf(dbf_text,"qi%02xct%02x",qidx,count); | |
3181 | QDIO_DBF_TEXT3(0,trace,dbf_text); | |
3182 | #endif /* CONFIG_QDIO_DEBUG */ | |
3183 | ||
3184 | if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE) | |
3185 | return -EBUSY; | |
3186 | ||
3187 | if (callflags&QDIO_FLAG_SYNC_INPUT) | |
3188 | do_qdio_handle_inbound(irq_ptr->input_qs[queue_number], | |
3189 | callflags, qidx, count, buffers); | |
3190 | else if (callflags&QDIO_FLAG_SYNC_OUTPUT) | |
3191 | do_qdio_handle_outbound(irq_ptr->output_qs[queue_number], | |
3192 | callflags, qidx, count, buffers); | |
3193 | else { | |
3194 | QDIO_DBF_TEXT3(1,trace,"doQD:inv"); | |
3195 | return -EINVAL; | |
3196 | } | |
3197 | return 0; | |
3198 | } | |
3199 | ||
3200 | #ifdef QDIO_PERFORMANCE_STATS | |
3201 | static int | |
3202 | qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset, | |
3203 | int buffer_length, int *eof, void *data) | |
3204 | { | |
3205 | int c=0; | |
3206 | ||
3207 | /* we are always called with buffer_length=4k, so we all | |
3208 | deliver on the first read */ | |
3209 | if (offset>0) | |
3210 | return 0; | |
3211 | ||
3212 | #define _OUTP_IT(x...) c+=sprintf(buffer+c,x) | |
3213 | _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c); | |
3214 | _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c); | |
3215 | _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c); | |
3216 | _OUTP_IT("Number of tasklet runs (total) : %u\n", | |
3217 | perf_stats.tl_runs); | |
3218 | _OUTP_IT("\n"); | |
3219 | _OUTP_IT("Number of SIGA sync's issued : %u\n", | |
3220 | perf_stats.siga_syncs); | |
3221 | _OUTP_IT("Number of SIGA in's issued : %u\n", | |
3222 | perf_stats.siga_ins); | |
3223 | _OUTP_IT("Number of SIGA out's issued : %u\n", | |
3224 | perf_stats.siga_outs); | |
3225 | _OUTP_IT("Number of PCIs caught : %u\n", | |
3226 | perf_stats.pcis); | |
3227 | _OUTP_IT("Number of adapter interrupts caught : %u\n", | |
3228 | perf_stats.thinints); | |
3229 | _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %u\n", | |
3230 | perf_stats.fast_reqs); | |
3231 | _OUTP_IT("\n"); | |
3232 | _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n", | |
3233 | perf_stats.inbound_time); | |
3234 | _OUTP_IT("Number of inbound transfers : %u\n", | |
3235 | perf_stats.inbound_cnt); | |
3236 | _OUTP_IT("Total time of all outbound do_QDIOs (us) : %u\n", | |
3237 | perf_stats.outbound_time); | |
3238 | _OUTP_IT("Number of do_QDIOs outbound : %u\n", | |
3239 | perf_stats.outbound_cnt); | |
3240 | _OUTP_IT("\n"); | |
3241 | ||
3242 | return c; | |
3243 | } | |
3244 | ||
3245 | static struct proc_dir_entry *qdio_perf_proc_file; | |
3246 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3247 | ||
3248 | static void | |
3249 | qdio_add_procfs_entry(void) | |
3250 | { | |
3251 | #ifdef QDIO_PERFORMANCE_STATS | |
3252 | proc_perf_file_registration=0; | |
3253 | qdio_perf_proc_file=create_proc_entry(QDIO_PERF, | |
3254 | S_IFREG|0444,&proc_root); | |
3255 | if (qdio_perf_proc_file) { | |
3256 | qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read; | |
3257 | } else proc_perf_file_registration=-1; | |
3258 | ||
3259 | if (proc_perf_file_registration) | |
3260 | QDIO_PRINT_WARN("was not able to register perf. " \ | |
3261 | "proc-file (%i).\n", | |
3262 | proc_perf_file_registration); | |
3263 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3264 | } | |
3265 | ||
3266 | static void | |
3267 | qdio_remove_procfs_entry(void) | |
3268 | { | |
3269 | #ifdef QDIO_PERFORMANCE_STATS | |
3270 | perf_stats.tl_runs=0; | |
3271 | ||
3272 | if (!proc_perf_file_registration) /* means if it went ok earlier */ | |
3273 | remove_proc_entry(QDIO_PERF,&proc_root); | |
3274 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3275 | } | |
3276 | ||
3277 | static void | |
3278 | tiqdio_register_thinints(void) | |
3279 | { | |
3280 | char dbf_text[20]; | |
3281 | register_thinint_result= | |
3282 | s390_register_adapter_interrupt(&tiqdio_thinint_handler); | |
3283 | if (register_thinint_result) { | |
3284 | sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff)); | |
3285 | QDIO_DBF_TEXT0(0,setup,dbf_text); | |
3286 | QDIO_PRINT_ERR("failed to register adapter handler " \ | |
3287 | "(rc=%i).\nAdapter interrupts might " \ | |
3288 | "not work. Continuing.\n", | |
3289 | register_thinint_result); | |
3290 | } | |
3291 | } | |
3292 | ||
3293 | static void | |
3294 | tiqdio_unregister_thinints(void) | |
3295 | { | |
3296 | if (!register_thinint_result) | |
3297 | s390_unregister_adapter_interrupt(&tiqdio_thinint_handler); | |
3298 | } | |
3299 | ||
3300 | static int | |
3301 | qdio_get_qdio_memory(void) | |
3302 | { | |
3303 | int i; | |
3304 | indicator_used[0]=1; | |
3305 | ||
3306 | for (i=1;i<INDICATORS_PER_CACHELINE;i++) | |
3307 | indicator_used[i]=0; | |
3308 | indicators=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE), | |
3309 | GFP_KERNEL); | |
3310 | if (!indicators) return -ENOMEM; | |
3311 | memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE)); | |
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | static void | |
3316 | qdio_release_qdio_memory(void) | |
3317 | { | |
3318 | if (indicators) | |
3319 | kfree(indicators); | |
3320 | } | |
3321 | ||
3322 | static void | |
3323 | qdio_unregister_dbf_views(void) | |
3324 | { | |
3325 | if (qdio_dbf_setup) | |
3326 | debug_unregister(qdio_dbf_setup); | |
3327 | if (qdio_dbf_sbal) | |
3328 | debug_unregister(qdio_dbf_sbal); | |
3329 | if (qdio_dbf_sense) | |
3330 | debug_unregister(qdio_dbf_sense); | |
3331 | if (qdio_dbf_trace) | |
3332 | debug_unregister(qdio_dbf_trace); | |
3333 | #ifdef CONFIG_QDIO_DEBUG | |
3334 | if (qdio_dbf_slsb_out) | |
3335 | debug_unregister(qdio_dbf_slsb_out); | |
3336 | if (qdio_dbf_slsb_in) | |
3337 | debug_unregister(qdio_dbf_slsb_in); | |
3338 | #endif /* CONFIG_QDIO_DEBUG */ | |
3339 | } | |
3340 | ||
3341 | static int | |
3342 | qdio_register_dbf_views(void) | |
3343 | { | |
3344 | qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME, | |
66a464db | 3345 | QDIO_DBF_SETUP_PAGES, |
1da177e4 LT |
3346 | QDIO_DBF_SETUP_NR_AREAS, |
3347 | QDIO_DBF_SETUP_LEN); | |
3348 | if (!qdio_dbf_setup) | |
3349 | goto oom; | |
3350 | debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view); | |
3351 | debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL); | |
3352 | ||
3353 | qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME, | |
66a464db | 3354 | QDIO_DBF_SBAL_PAGES, |
1da177e4 LT |
3355 | QDIO_DBF_SBAL_NR_AREAS, |
3356 | QDIO_DBF_SBAL_LEN); | |
3357 | if (!qdio_dbf_sbal) | |
3358 | goto oom; | |
3359 | ||
3360 | debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view); | |
3361 | debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL); | |
3362 | ||
3363 | qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME, | |
66a464db | 3364 | QDIO_DBF_SENSE_PAGES, |
1da177e4 LT |
3365 | QDIO_DBF_SENSE_NR_AREAS, |
3366 | QDIO_DBF_SENSE_LEN); | |
3367 | if (!qdio_dbf_sense) | |
3368 | goto oom; | |
3369 | ||
3370 | debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view); | |
3371 | debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL); | |
3372 | ||
3373 | qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME, | |
66a464db | 3374 | QDIO_DBF_TRACE_PAGES, |
1da177e4 LT |
3375 | QDIO_DBF_TRACE_NR_AREAS, |
3376 | QDIO_DBF_TRACE_LEN); | |
3377 | if (!qdio_dbf_trace) | |
3378 | goto oom; | |
3379 | ||
3380 | debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view); | |
3381 | debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL); | |
3382 | ||
3383 | #ifdef CONFIG_QDIO_DEBUG | |
3384 | qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME, | |
66a464db | 3385 | QDIO_DBF_SLSB_OUT_PAGES, |
1da177e4 LT |
3386 | QDIO_DBF_SLSB_OUT_NR_AREAS, |
3387 | QDIO_DBF_SLSB_OUT_LEN); | |
3388 | if (!qdio_dbf_slsb_out) | |
3389 | goto oom; | |
3390 | debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view); | |
3391 | debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL); | |
3392 | ||
3393 | qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME, | |
66a464db | 3394 | QDIO_DBF_SLSB_IN_PAGES, |
1da177e4 LT |
3395 | QDIO_DBF_SLSB_IN_NR_AREAS, |
3396 | QDIO_DBF_SLSB_IN_LEN); | |
3397 | if (!qdio_dbf_slsb_in) | |
3398 | goto oom; | |
3399 | debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view); | |
3400 | debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL); | |
3401 | #endif /* CONFIG_QDIO_DEBUG */ | |
3402 | return 0; | |
3403 | oom: | |
3404 | QDIO_PRINT_ERR("not enough memory for dbf.\n"); | |
3405 | qdio_unregister_dbf_views(); | |
3406 | return -ENOMEM; | |
3407 | } | |
3408 | ||
3409 | static int __init | |
3410 | init_QDIO(void) | |
3411 | { | |
3412 | int res; | |
3413 | #ifdef QDIO_PERFORMANCE_STATS | |
3414 | void *ptr; | |
3415 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3416 | ||
3417 | printk("qdio: loading %s\n",version); | |
3418 | ||
3419 | res=qdio_get_qdio_memory(); | |
3420 | if (res) | |
3421 | return res; | |
3422 | ||
3423 | res = qdio_register_dbf_views(); | |
3424 | if (res) | |
3425 | return res; | |
3426 | ||
3427 | QDIO_DBF_TEXT0(0,setup,"initQDIO"); | |
3428 | ||
3429 | #ifdef QDIO_PERFORMANCE_STATS | |
3430 | memset((void*)&perf_stats,0,sizeof(perf_stats)); | |
3431 | QDIO_DBF_TEXT0(0,setup,"perfstat"); | |
3432 | ptr=&perf_stats; | |
3433 | QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*)); | |
3434 | #endif /* QDIO_PERFORMANCE_STATS */ | |
3435 | ||
3436 | qdio_add_procfs_entry(); | |
3437 | ||
3438 | if (tiqdio_check_chsc_availability()) | |
3439 | QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n"); | |
3440 | ||
3441 | tiqdio_register_thinints(); | |
3442 | ||
3443 | return 0; | |
3444 | } | |
3445 | ||
3446 | static void __exit | |
3447 | cleanup_QDIO(void) | |
3448 | { | |
3449 | tiqdio_unregister_thinints(); | |
3450 | qdio_remove_procfs_entry(); | |
3451 | qdio_release_qdio_memory(); | |
3452 | qdio_unregister_dbf_views(); | |
3453 | ||
3454 | printk("qdio: %s: module removed\n",version); | |
3455 | } | |
3456 | ||
3457 | module_init(init_QDIO); | |
3458 | module_exit(cleanup_QDIO); | |
3459 | ||
3460 | EXPORT_SYMBOL(qdio_allocate); | |
3461 | EXPORT_SYMBOL(qdio_establish); | |
3462 | EXPORT_SYMBOL(qdio_initialize); | |
3463 | EXPORT_SYMBOL(qdio_activate); | |
3464 | EXPORT_SYMBOL(do_QDIO); | |
3465 | EXPORT_SYMBOL(qdio_shutdown); | |
3466 | EXPORT_SYMBOL(qdio_free); | |
3467 | EXPORT_SYMBOL(qdio_cleanup); | |
3468 | EXPORT_SYMBOL(qdio_synchronize); |