drivers/s390/cio/qdio_main.c

   1 /*
   2  * linux/drivers/s390/cio/qdio_main.c
   3  *
   4  * Linux for s390 qdio support, buffer handling, qdio API and module support.
   5  *
   6  * Copyright 2000,2008 IBM Corp.
   7  * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
   8  *            Jan Glauber <jang@linux.vnet.ibm.com>
   9  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  10  */
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/timer.h>
  15 #include <linux/delay.h>
  16 #include <linux/gfp.h>
  17 #include <linux/io.h>
  18 #include <linux/kernel_stat.h>
  19 #include <linux/atomic.h>
  20 #include <asm/debug.h>
  21 #include <asm/qdio.h>
  22
  23 #include "cio.h"
  24 #include "css.h"
  25 #include "device.h"
  26 #include "qdio.h"
  27 #include "qdio_debug.h"
  28
  29 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\
  30         "Jan Glauber <jang@linux.vnet.ibm.com>");
  31 MODULE_DESCRIPTION("QDIO base support");
  32 MODULE_LICENSE("GPL");
  33
  34 static inline int do_siga_sync(unsigned long schid,
  35                                unsigned int out_mask, unsigned int in_mask,
  36                                unsigned int fc)
  37 {
  38         register unsigned long __fc asm ("0") = fc;
  39         register unsigned long __schid asm ("1") = schid;
  40         register unsigned long out asm ("2") = out_mask;
  41         register unsigned long in asm ("3") = in_mask;
  42         int cc;
  43
  44         asm volatile(
  45                 "       siga    0\n"
  46                 "       ipm     %0\n"
  47                 "       srl     %0,28\n"
  48                 : "=d" (cc)
  49                 : "d" (__fc), "d" (__schid), "d" (out), "d" (in) : "cc");
  50         return cc;
  51 }
  52
  53 static inline int do_siga_input(unsigned long schid, unsigned int mask,
  54                                 unsigned int fc)
  55 {
  56         register unsigned long __fc asm ("0") = fc;
  57         register unsigned long __schid asm ("1") = schid;
  58         register unsigned long __mask asm ("2") = mask;
  59         int cc;
  60
  61         asm volatile(
  62                 "       siga    0\n"
  63                 "       ipm     %0\n"
  64                 "       srl     %0,28\n"
  65                 : "=d" (cc)
  66                 : "d" (__fc), "d" (__schid), "d" (__mask) : "cc", "memory");
  67         return cc;
  68 }
  69
  70 /**
  71  * do_siga_output - perform SIGA-w/wt function
  72  * @schid: subchannel id or in case of QEBSM the subchannel token
  73  * @mask: which output queues to process
  74  * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer
  75  * @fc: function code to perform
  76  *
  77  * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION.
  78  * Note: For IQDC unicast queues only the highest priority queue is processed.
  79  */
  80 static inline int do_siga_output(unsigned long schid, unsigned long mask,
  81                                  unsigned int *bb, unsigned int fc,
  82                                  unsigned long aob)
  83 {
  84         register unsigned long __fc asm("0") = fc;
  85         register unsigned long __schid asm("1") = schid;
  86         register unsigned long __mask asm("2") = mask;
  87         register unsigned long __aob asm("3") = aob;
  88         int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION;
  89
  90         asm volatile(
  91                 "       siga    0\n"
  92                 "0:     ipm     %0\n"
  93                 "       srl     %0,28\n"
  94                 "1:\n"
  95                 EX_TABLE(0b, 1b)
  96                 : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask),
  97                   "+d" (__aob)
  98                 : : "cc", "memory");
  99         *bb = ((unsigned int) __fc) >> 31;
 100         return cc;
 101 }
 102
 103 static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 104 {
 105         /* all done or next buffer state different */
 106         if (ccq == 0 || ccq == 32)
 107                 return 0;
 108         /* not all buffers processed */
 109         if (ccq == 96 || ccq == 97)
 110                 return 1;
 111         /* notify devices immediately */
 112         DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq);
 113         return -EIO;
 114 }
 115
 116 /**
 117  * qdio_do_eqbs - extract buffer states for QEBSM
 118  * @q: queue to manipulate
 119  * @state: state of the extracted buffers
 120  * @start: buffer number to start at
 121  * @count: count of buffers to examine
 122  * @auto_ack: automatically acknowledge buffers
 123  *
 124  * Returns the number of successfully extracted equal buffer states.
 125  * Stops processing if a state is different from the last buffers state.
 126  */
 127 static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 128                         int start, int count, int auto_ack)
 129 {
 130         unsigned int ccq = 0;
 131         int tmp_count = count, tmp_start = start;
 132         int nr = q->nr;
 133         int rc;
 134
 135         BUG_ON(!q->irq_ptr->sch_token);
 136         qperf_inc(q, eqbs);
 137
 138         if (!q->is_input_q)
 139                 nr += q->irq_ptr->nr_input_qs;
 140 again:
 141         ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count,
 142                       auto_ack);
 143         rc = qdio_check_ccq(q, ccq);
 144
 145         /* At least one buffer was processed, return and extract the remaining
 146          * buffers later.
 147          */
 148         if ((ccq == 96) && (count != tmp_count)) {
 149                 qperf_inc(q, eqbs_partial);
 150                 return (count - tmp_count);
 151         }
 152
 153         if (rc == 1) {
 154                 DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq);
 155                 goto again;
 156         }
 157
 158         if (rc < 0) {
 159                 DBF_ERROR("%4x EQBS ERROR", SCH_NO(q));
 160                 DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
 161                 q->handler(q->irq_ptr->cdev,
 162                            QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
 163                            0, -1, -1, q->irq_ptr->int_parm);
 164                 return 0;
 165         }
 166         return count - tmp_count;
 167 }
 168
 169 /**
 170  * qdio_do_sqbs - set buffer states for QEBSM
 171  * @q: queue to manipulate
 172  * @state: new state of the buffers
 173  * @start: first buffer number to change
 174  * @count: how many buffers to change
 175  *
 176  * Returns the number of successfully changed buffers.
 177  * Does retrying until the specified count of buffer states is set or an
 178  * error occurs.
 179  */
 180 static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start,
 181                         int count)
 182 {
 183         unsigned int ccq = 0;
 184         int tmp_count = count, tmp_start = start;
 185         int nr = q->nr;
 186         int rc;
 187
 188         if (!count)
 189                 return 0;
 190
 191         BUG_ON(!q->irq_ptr->sch_token);
 192         qperf_inc(q, sqbs);
 193
 194         if (!q->is_input_q)
 195                 nr += q->irq_ptr->nr_input_qs;
 196 again:
 197         ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count);
 198         rc = qdio_check_ccq(q, ccq);
 199         if (rc == 1) {
 200                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq);
 201                 qperf_inc(q, sqbs_partial);
 202                 goto again;
 203         }
 204         if (rc < 0) {
 205                 DBF_ERROR("%4x SQBS ERROR", SCH_NO(q));
 206                 DBF_ERROR("%3d%3d%2d", count, tmp_count, nr);
 207                 q->handler(q->irq_ptr->cdev,
 208                            QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
 209                            0, -1, -1, q->irq_ptr->int_parm);
 210                 return 0;
 211         }
 212         WARN_ON(tmp_count);
 213         return count - tmp_count;
 214 }
 215
 216 /* returns number of examined buffers and their common state in *state */
 217 static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
 218                                  unsigned char *state, unsigned int count,
 219                                  int auto_ack, int merge_pending)
 220 {
 221         unsigned char __state = 0;
 222         int i;
 223
 224         BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK);
 225         BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q);
 226
 227         if (is_qebsm(q))
 228                 return qdio_do_eqbs(q, state, bufnr, count, auto_ack);
 229
 230         for (i = 0; i < count; i++) {
 231                 if (!__state) {
 232                         __state = q->slsb.val[bufnr];
 233                         if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
 234                                 __state = SLSB_P_OUTPUT_EMPTY;
 235                 } else if (merge_pending) {
 236                         if ((q->slsb.val[bufnr] & __state) != __state)
 237                                 break;
 238                 } else if (q->slsb.val[bufnr] != __state)
 239                         break;
 240                 bufnr = next_buf(bufnr);
 241         }
 242         *state = __state;
 243         return i;
 244 }
 245
 246 static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr,
 247                                 unsigned char *state, int auto_ack)
 248 {
 249         return get_buf_states(q, bufnr, state, 1, auto_ack, 0);
 250 }
 251
 252 /* wrap-around safe setting of slsb states, returns number of changed buffers */
 253 static inline int set_buf_states(struct qdio_q *q, int bufnr,
 254                                  unsigned char state, int count)
 255 {
 256         int i;
 257
 258         BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK);
 259         BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q);
 260
 261         if (is_qebsm(q))
 262                 return qdio_do_sqbs(q, state, bufnr, count);
 263
 264         for (i = 0; i < count; i++) {
 265                 xchg(&q->slsb.val[bufnr], state);
 266                 bufnr = next_buf(bufnr);
 267         }
 268         return count;
 269 }
 270
 271 static inline int set_buf_state(struct qdio_q *q, int bufnr,
 272                                 unsigned char state)
 273 {
 274         return set_buf_states(q, bufnr, state, 1);
 275 }
 276
 277 /* set slsb states to initial state */
 278 void qdio_init_buf_states(struct qdio_irq *irq_ptr)
 279 {
 280         struct qdio_q *q;
 281         int i;
 282
 283         for_each_input_queue(irq_ptr, q, i)
 284                 set_buf_states(q, 0, SLSB_P_INPUT_NOT_INIT,
 285                                QDIO_MAX_BUFFERS_PER_Q);
 286         for_each_output_queue(irq_ptr, q, i)
 287                 set_buf_states(q, 0, SLSB_P_OUTPUT_NOT_INIT,
 288                                QDIO_MAX_BUFFERS_PER_Q);
 289 }
 290
 291 static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output,
 292                           unsigned int input)
 293 {
 294         unsigned long schid = *((u32 *) &q->irq_ptr->schid);
 295         unsigned int fc = QDIO_SIGA_SYNC;
 296         int cc;
 297
 298         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr);
 299         qperf_inc(q, siga_sync);
 300
 301         if (is_qebsm(q)) {
 302                 schid = q->irq_ptr->sch_token;
 303                 fc |= QDIO_SIGA_QEBSM_FLAG;
 304         }
 305
 306         cc = do_siga_sync(schid, output, input, fc);
 307         if (unlikely(cc))
 308                 DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc);
 309         return cc;
 310 }
 311
 312 static inline int qdio_siga_sync_q(struct qdio_q *q)
 313 {
 314         if (q->is_input_q)
 315                 return qdio_siga_sync(q, 0, q->mask);
 316         else
 317                 return qdio_siga_sync(q, q->mask, 0);
 318 }
 319
 320 static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
 321         unsigned long aob)
 322 {
 323         unsigned long schid = *((u32 *) &q->irq_ptr->schid);
 324         unsigned int fc = QDIO_SIGA_WRITE;
 325         u64 start_time = 0;
 326         int retries = 0, cc;
 327         unsigned long laob = 0;
 328
 329         if (q->u.out.use_cq && aob != 0) {
 330                 fc = QDIO_SIGA_WRITEQ;
 331                 laob = aob;
 332         }
 333
 334         if (is_qebsm(q)) {
 335                 schid = q->irq_ptr->sch_token;
 336                 fc |= QDIO_SIGA_QEBSM_FLAG;
 337         }
 338 again:
 339         WARN_ON_ONCE((aob && queue_type(q) != QDIO_IQDIO_QFMT) ||
 340                 (aob && fc != QDIO_SIGA_WRITEQ));
 341         cc = do_siga_output(schid, q->mask, busy_bit, fc, laob);
 342
 343         /* hipersocket busy condition */
 344         if (unlikely(*busy_bit)) {
 345                 WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2);
 346                 retries++;
 347
 348                 if (!start_time) {
 349                         start_time = get_clock();
 350                         goto again;
 351                 }
 352                 if ((get_clock() - start_time) < QDIO_BUSY_BIT_PATIENCE)
 353                         goto again;
 354         }
 355         if (retries) {
 356                 DBF_DEV_EVENT(DBF_WARN, q->irq_ptr,
 357                               "%4x cc2 BB1:%1d", SCH_NO(q), q->nr);
 358                 DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "count:%u", retries);
 359         }
 360         return cc;
 361 }
 362
 363 static inline int qdio_siga_input(struct qdio_q *q)
 364 {
 365         unsigned long schid = *((u32 *) &q->irq_ptr->schid);
 366         unsigned int fc = QDIO_SIGA_READ;
 367         int cc;
 368
 369         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr);
 370         qperf_inc(q, siga_read);
 371
 372         if (is_qebsm(q)) {
 373                 schid = q->irq_ptr->sch_token;
 374                 fc |= QDIO_SIGA_QEBSM_FLAG;
 375         }
 376
 377         cc = do_siga_input(schid, q->mask, fc);
 378         if (unlikely(cc))
 379                 DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc);
 380         return cc;
 381 }
 382
 383 #define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0)
 384 #define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U)
 385
 386 static inline void qdio_sync_queues(struct qdio_q *q)
 387 {
 388         /* PCI capable outbound queues will also be scanned so sync them too */
 389         if (pci_out_supported(q))
 390                 qdio_siga_sync_all(q);
 391         else
 392                 qdio_siga_sync_q(q);
 393 }
 394
 395 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
 396                         unsigned char *state)
 397 {
 398         if (need_siga_sync(q))
 399                 qdio_siga_sync_q(q);
 400         return get_buf_states(q, bufnr, state, 1, 0, 0);
 401 }
 402
 403 static inline void qdio_stop_polling(struct qdio_q *q)
 404 {
 405         if (!q->u.in.polling)
 406                 return;
 407
 408         q->u.in.polling = 0;
 409         qperf_inc(q, stop_polling);
 410
 411         /* show the card that we are not polling anymore */
 412         if (is_qebsm(q)) {
 413                 set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
 414                                q->u.in.ack_count);
 415                 q->u.in.ack_count = 0;
 416         } else
 417                 set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
 418 }
 419
 420 static inline void account_sbals(struct qdio_q *q, int count)
 421 {
 422         int pos = 0;
 423
 424         q->q_stats.nr_sbal_total += count;
 425         if (count == QDIO_MAX_BUFFERS_MASK) {
 426                 q->q_stats.nr_sbals[7]++;
 427                 return;
 428         }
 429         while (count >>= 1)
 430                 pos++;
 431         q->q_stats.nr_sbals[pos]++;
 432 }
 433
 434 static void process_buffer_error(struct qdio_q *q, int count)
 435 {
 436         unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT :
 437                                         SLSB_P_OUTPUT_NOT_INIT;
 438
 439         q->qdio_error |= QDIO_ERROR_SLSB_STATE;
 440
 441         /* special handling for no target buffer empty */
 442         if ((!q->is_input_q &&
 443             (q->sbal[q->first_to_check]->element[15].sflags) == 0x10)) {
 444                 qperf_inc(q, target_full);
 445                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x",
 446                               q->first_to_check);
 447                 return;
 448         }
 449
 450         DBF_ERROR("%4x BUF ERROR", SCH_NO(q));
 451         DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr);
 452         DBF_ERROR("FTC:%3d C:%3d", q->first_to_check, count);
 453         DBF_ERROR("F14:%2x F15:%2x",
 454                   q->sbal[q->first_to_check]->element[14].sflags,
 455                   q->sbal[q->first_to_check]->element[15].sflags);
 456
 457         /*
 458          * Interrupts may be avoided as long as the error is present
 459          * so change the buffer state immediately to avoid starvation.
 460          */
 461         set_buf_states(q, q->first_to_check, state, count);
 462 }
 463
 464 static inline void inbound_primed(struct qdio_q *q, int count)
 465 {
 466         int new;
 467
 468         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim: %02x", count);
 469
 470         /* for QEBSM the ACK was already set by EQBS */
 471         if (is_qebsm(q)) {
 472                 if (!q->u.in.polling) {
 473                         q->u.in.polling = 1;
 474                         q->u.in.ack_count = count;
 475                         q->u.in.ack_start = q->first_to_check;
 476                         return;
 477                 }
 478
 479                 /* delete the previous ACK's */
 480                 set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
 481                                q->u.in.ack_count);
 482                 q->u.in.ack_count = count;
 483                 q->u.in.ack_start = q->first_to_check;
 484                 return;
 485         }
 486
 487         /*
 488          * ACK the newest buffer. The ACK will be removed in qdio_stop_polling
 489          * or by the next inbound run.
 490          */
 491         new = add_buf(q->first_to_check, count - 1);
 492         if (q->u.in.polling) {
 493                 /* reset the previous ACK but first set the new one */
 494                 set_buf_state(q, new, SLSB_P_INPUT_ACK);
 495                 set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
 496         } else {
 497                 q->u.in.polling = 1;
 498                 set_buf_state(q, new, SLSB_P_INPUT_ACK);
 499         }
 500
 501         q->u.in.ack_start = new;
 502         count--;
 503         if (!count)
 504                 return;
 505         /* need to change ALL buffers to get more interrupts */
 506         set_buf_states(q, q->first_to_check, SLSB_P_INPUT_NOT_INIT, count);
 507 }
 508
 509 static int get_inbound_buffer_frontier(struct qdio_q *q)
 510 {
 511         int count, stop;
 512         unsigned char state = 0;
 513
 514         /*
 515          * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
 516          * would return 0.
 517          */
 518         count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
 519         stop = add_buf(q->first_to_check, count);
 520
 521         if (q->first_to_check == stop)
 522                 goto out;
 523
 524         /*
 525          * No siga sync here, as a PCI or we after a thin interrupt
 526          * already sync'ed the queues.
 527          */
 528         count = get_buf_states(q, q->first_to_check, &state, count, 1, 0);
 529         if (!count)
 530                 goto out;
 531
 532         switch (state) {
 533         case SLSB_P_INPUT_PRIMED:
 534                 inbound_primed(q, count);
 535                 q->first_to_check = add_buf(q->first_to_check, count);
 536                 if (atomic_sub(count, &q->nr_buf_used) == 0)
 537                         qperf_inc(q, inbound_queue_full);
 538                 if (q->irq_ptr->perf_stat_enabled)
 539                         account_sbals(q, count);
 540                 break;
 541         case SLSB_P_INPUT_ERROR:
 542                 process_buffer_error(q, count);
 543                 q->first_to_check = add_buf(q->first_to_check, count);
 544                 atomic_sub(count, &q->nr_buf_used);
 545                 if (q->irq_ptr->perf_stat_enabled)
 546                         account_sbals_error(q, count);
 547                 break;
 548         case SLSB_CU_INPUT_EMPTY:
 549         case SLSB_P_INPUT_NOT_INIT:
 550         case SLSB_P_INPUT_ACK:
 551                 if (q->irq_ptr->perf_stat_enabled)
 552                         q->q_stats.nr_sbal_nop++;
 553                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop");
 554                 break;
 555         default:
 556                 BUG();
 557         }
 558 out:
 559         return q->first_to_check;
 560 }
 561
 562 static int qdio_inbound_q_moved(struct qdio_q *q)
 563 {
 564         int bufnr;
 565
 566         bufnr = get_inbound_buffer_frontier(q);
 567
 568         if ((bufnr != q->last_move) || q->qdio_error) {
 569                 q->last_move = bufnr;
 570                 if (!is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR)
 571                         q->u.in.timestamp = get_clock();
 572                 return 1;
 573         } else
 574                 return 0;
 575 }
 576
 577 static inline int qdio_inbound_q_done(struct qdio_q *q)
 578 {
 579         unsigned char state = 0;
 580
 581         if (!atomic_read(&q->nr_buf_used))
 582                 return 1;
 583
 584         if (need_siga_sync(q))
 585                 qdio_siga_sync_q(q);
 586         get_buf_state(q, q->first_to_check, &state, 0);
 587
 588         if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR)
 589                 /* more work coming */
 590                 return 0;
 591
 592         if (is_thinint_irq(q->irq_ptr))
 593                 return 1;
 594
 595         /* don't poll under z/VM */
 596         if (MACHINE_IS_VM)
 597                 return 1;
 598
 599         /*
 600          * At this point we know, that inbound first_to_check
 601          * has (probably) not moved (see qdio_inbound_processing).
 602          */
 603         if (get_clock() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) {
 604                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%02x",
 605                               q->first_to_check);
 606                 return 1;
 607         } else
 608                 return 0;
 609 }
 610
 611 static inline int contains_aobs(struct qdio_q *q)
 612 {
 613         return !q->is_input_q && q->u.out.use_cq;
 614 }
 615
 616 static inline void qdio_trace_aob(struct qdio_irq *irq, struct qdio_q *q,
 617                                 int i, struct qaob *aob)
 618 {
 619         int tmp;
 620
 621         DBF_DEV_EVENT(DBF_INFO, irq, "AOB%d:%lx", i,
 622                         (unsigned long) virt_to_phys(aob));
 623         DBF_DEV_EVENT(DBF_INFO, irq, "RES00:%lx",
 624                         (unsigned long) aob->res0[0]);
 625         DBF_DEV_EVENT(DBF_INFO, irq, "RES01:%lx",
 626                         (unsigned long) aob->res0[1]);
 627         DBF_DEV_EVENT(DBF_INFO, irq, "RES02:%lx",
 628                         (unsigned long) aob->res0[2]);
 629         DBF_DEV_EVENT(DBF_INFO, irq, "RES03:%lx",
 630                         (unsigned long) aob->res0[3]);
 631         DBF_DEV_EVENT(DBF_INFO, irq, "RES04:%lx",
 632                         (unsigned long) aob->res0[4]);
 633         DBF_DEV_EVENT(DBF_INFO, irq, "RES05:%lx",
 634                         (unsigned long) aob->res0[5]);
 635         DBF_DEV_EVENT(DBF_INFO, irq, "RES1:%x", aob->res1);
 636         DBF_DEV_EVENT(DBF_INFO, irq, "RES2:%x", aob->res2);
 637         DBF_DEV_EVENT(DBF_INFO, irq, "RES3:%x", aob->res3);
 638         DBF_DEV_EVENT(DBF_INFO, irq, "AORC:%u", aob->aorc);
 639         DBF_DEV_EVENT(DBF_INFO, irq, "FLAGS:%u", aob->flags);
 640         DBF_DEV_EVENT(DBF_INFO, irq, "CBTBS:%u", aob->cbtbs);
 641         DBF_DEV_EVENT(DBF_INFO, irq, "SBC:%u", aob->sb_count);
 642         for (tmp = 0; tmp < QDIO_MAX_ELEMENTS_PER_BUFFER; ++tmp) {
 643                 DBF_DEV_EVENT(DBF_INFO, irq, "SBA%d:%lx", tmp,
 644                                 (unsigned long) aob->sba[tmp]);
 645                 DBF_DEV_EVENT(DBF_INFO, irq, "rSBA%d:%lx", tmp,
 646                                 (unsigned long) q->sbal[i]->element[tmp].addr);
 647                 DBF_DEV_EVENT(DBF_INFO, irq, "DC%d:%u", tmp, aob->dcount[tmp]);
 648                 DBF_DEV_EVENT(DBF_INFO, irq, "rDC%d:%u", tmp,
 649                                 q->sbal[i]->element[tmp].length);
 650         }
 651         DBF_DEV_EVENT(DBF_INFO, irq, "USER0:%lx", (unsigned long) aob->user0);
 652         for (tmp = 0; tmp < 2; ++tmp) {
 653                 DBF_DEV_EVENT(DBF_INFO, irq, "RES4%d:%lx", tmp,
 654                         (unsigned long) aob->res4[tmp]);
 655         }
 656         DBF_DEV_EVENT(DBF_INFO, irq, "USER1:%lx", (unsigned long) aob->user1);
 657         DBF_DEV_EVENT(DBF_INFO, irq, "USER2:%lx", (unsigned long) aob->user2);
 658 }
 659
 660 static inline void qdio_handle_aobs(struct qdio_q *q, int start, int count)
 661 {
 662         unsigned char state = 0;
 663         int j, b = start;
 664
 665         if (!contains_aobs(q))
 666                 return;
 667
 668         for (j = 0; j < count; ++j) {
 669                 get_buf_state(q, b, &state, 0);
 670                 if (state == SLSB_P_OUTPUT_PENDING) {
 671                         struct qaob *aob = q->u.out.aobs[b];
 672                         if (aob == NULL)
 673                                 continue;
 674
 675                         BUG_ON(q->u.out.sbal_state == NULL);
 676                         q->u.out.sbal_state[b].flags |=
 677                                 QDIO_OUTBUF_STATE_FLAG_PENDING;
 678                         q->u.out.aobs[b] = NULL;
 679                 } else if (state == SLSB_P_OUTPUT_EMPTY) {
 680                         BUG_ON(q->u.out.sbal_state == NULL);
 681                         q->u.out.sbal_state[b].aob = NULL;
 682                 }
 683                 b = next_buf(b);
 684         }
 685 }
 686
 687 static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
 688                                         int bufnr)
 689 {
 690         unsigned long phys_aob = 0;
 691
 692         if (!q->use_cq)
 693                 goto out;
 694
 695         if (!q->aobs[bufnr]) {
 696                 struct qaob *aob = qdio_allocate_aob();
 697                 q->aobs[bufnr] = aob;
 698         }
 699         if (q->aobs[bufnr]) {
 700                 BUG_ON(q->sbal_state == NULL);
 701                 q->sbal_state[bufnr].flags = QDIO_OUTBUF_STATE_FLAG_NONE;
 702                 q->sbal_state[bufnr].aob = q->aobs[bufnr];
 703                 q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user;
 704                 phys_aob = virt_to_phys(q->aobs[bufnr]);
 705                 BUG_ON(phys_aob & 0xFF);
 706         }
 707
 708 out:
 709         return phys_aob;
 710 }
 711
 712 static void qdio_kick_handler(struct qdio_q *q)
 713 {
 714         int start = q->first_to_kick;
 715         int end = q->first_to_check;
 716         int count;
 717
 718         if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
 719                 return;
 720
 721         count = sub_buf(end, start);
 722
 723         if (q->is_input_q) {
 724                 qperf_inc(q, inbound_handler);
 725                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%02x c:%02x", start, count);
 726         } else {
 727                 qperf_inc(q, outbound_handler);
 728                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: s:%02x c:%02x",
 729                               start, count);
 730         }
 731
 732         qdio_handle_aobs(q, start, count);
 733
 734         q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
 735                    q->irq_ptr->int_parm);
 736
 737         /* for the next time */
 738         q->first_to_kick = end;
 739         q->qdio_error = 0;
 740 }
 741
 742 static void __qdio_inbound_processing(struct qdio_q *q)
 743 {
 744         qperf_inc(q, tasklet_inbound);
 745
 746         if (!qdio_inbound_q_moved(q))
 747                 return;
 748
 749         qdio_kick_handler(q);
 750
 751         if (!qdio_inbound_q_done(q)) {
 752                 /* means poll time is not yet over */
 753                 qperf_inc(q, tasklet_inbound_resched);
 754                 if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) {
 755                         tasklet_schedule(&q->tasklet);
 756                         return;
 757                 }
 758         }
 759
 760         qdio_stop_polling(q);
 761         /*
 762          * We need to check again to not lose initiative after
 763          * resetting the ACK state.
 764          */
 765         if (!qdio_inbound_q_done(q)) {
 766                 qperf_inc(q, tasklet_inbound_resched2);
 767                 if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
 768                         tasklet_schedule(&q->tasklet);
 769         }
 770 }
 771
 772 void qdio_inbound_processing(unsigned long data)
 773 {
 774         struct qdio_q *q = (struct qdio_q *)data;
 775         __qdio_inbound_processing(q);
 776 }
 777
 778 static int get_outbound_buffer_frontier(struct qdio_q *q)
 779 {
 780         int count, stop;
 781         unsigned char state = 0;
 782
 783         if (need_siga_sync(q))
 784                 if (((queue_type(q) != QDIO_IQDIO_QFMT) &&
 785                     !pci_out_supported(q)) ||
 786                     (queue_type(q) == QDIO_IQDIO_QFMT &&
 787                     multicast_outbound(q)))
 788                         qdio_siga_sync_q(q);
 789
 790         /*
 791          * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
 792          * would return 0.
 793          */
 794         count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
 795         stop = add_buf(q->first_to_check, count);
 796         if (q->first_to_check == stop)
 797                 goto out;
 798
 799         count = get_buf_states(q, q->first_to_check, &state, count, 0, 1);
 800         if (!count)
 801                 goto out;
 802
 803         switch (state) {
 804         case SLSB_P_OUTPUT_PENDING:
 805                 BUG();
 806         case SLSB_P_OUTPUT_EMPTY:
 807                 /* the adapter got it */
 808                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr,
 809                         "out empty:%1d %02x", q->nr, count);
 810
 811                 atomic_sub(count, &q->nr_buf_used);
 812                 q->first_to_check = add_buf(q->first_to_check, count);
 813                 if (q->irq_ptr->perf_stat_enabled)
 814                         account_sbals(q, count);
 815
 816                 break;
 817         case SLSB_P_OUTPUT_ERROR:
 818                 process_buffer_error(q, count);
 819                 q->first_to_check = add_buf(q->first_to_check, count);
 820                 atomic_sub(count, &q->nr_buf_used);
 821                 if (q->irq_ptr->perf_stat_enabled)
 822                         account_sbals_error(q, count);
 823                 break;
 824         case SLSB_CU_OUTPUT_PRIMED:
 825                 /* the adapter has not fetched the output yet */
 826                 if (q->irq_ptr->perf_stat_enabled)
 827                         q->q_stats.nr_sbal_nop++;
 828                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d",
 829                               q->nr);
 830                 break;
 831         case SLSB_P_OUTPUT_NOT_INIT:
 832         case SLSB_P_OUTPUT_HALTED:
 833                 break;
 834         default:
 835                 BUG();
 836         }
 837
 838 out:
 839         return q->first_to_check;
 840 }
 841
 842 /* all buffers processed? */
 843 static inline int qdio_outbound_q_done(struct qdio_q *q)
 844 {
 845         return atomic_read(&q->nr_buf_used) == 0;
 846 }
 847
 848 static inline int qdio_outbound_q_moved(struct qdio_q *q)
 849 {
 850         int bufnr;
 851
 852         bufnr = get_outbound_buffer_frontier(q);
 853
 854         if ((bufnr != q->last_move) || q->qdio_error) {
 855                 q->last_move = bufnr;
 856                 DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr);
 857                 return 1;
 858         } else
 859                 return 0;
 860 }
 861
 862 static int qdio_kick_outbound_q(struct qdio_q *q, unsigned long aob)
 863 {
 864         int retries = 0, cc;
 865         unsigned int busy_bit;
 866
 867         if (!need_siga_out(q))
 868                 return 0;
 869
 870         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr);
 871 retry:
 872         qperf_inc(q, siga_write);
 873
 874         cc = qdio_siga_output(q, &busy_bit, aob);
 875         switch (cc) {
 876         case 0:
 877                 break;
 878         case 2:
 879                 if (busy_bit) {
 880                         while (++retries < QDIO_BUSY_BIT_RETRIES) {
 881                                 mdelay(QDIO_BUSY_BIT_RETRY_DELAY);
 882                                 goto retry;
 883                         }
 884                         DBF_ERROR("%4x cc2 BBC:%1d", SCH_NO(q), q->nr);
 885                         cc |= QDIO_ERROR_SIGA_BUSY;
 886                 } else
 887                         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr);
 888                 break;
 889         case 1:
 890         case 3:
 891                 DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc);
 892                 break;
 893         }
 894         if (retries) {
 895                 DBF_ERROR("%4x cc2 BB2:%1d", SCH_NO(q), q->nr);
 896                 DBF_ERROR("count:%u", retries);
 897         }
 898         return cc;
 899 }
 900
 901 static void __qdio_outbound_processing(struct qdio_q *q)
 902 {
 903         qperf_inc(q, tasklet_outbound);
 904         BUG_ON(atomic_read(&q->nr_buf_used) < 0);
 905
 906         if (qdio_outbound_q_moved(q))
 907                 qdio_kick_handler(q);
 908
 909         if (queue_type(q) == QDIO_ZFCP_QFMT)
 910                 if (!pci_out_supported(q) && !qdio_outbound_q_done(q))
 911                         goto sched;
 912
 913         /* bail out for HiperSockets unicast queues */
 914         if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q))
 915                 return;
 916
 917         if ((queue_type(q) == QDIO_IQDIO_QFMT) &&
 918             (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL)
 919                 goto sched;
 920
 921         if (q->u.out.pci_out_enabled)
 922                 return;
 923
 924         /*
 925          * Now we know that queue type is either qeth without pci enabled
 926          * or HiperSockets multicast. Make sure buffer switch from PRIMED to
 927          * EMPTY is noticed and outbound_handler is called after some time.
 928          */
 929         if (qdio_outbound_q_done(q))
 930                 del_timer(&q->u.out.timer);
 931         else
 932                 if (!timer_pending(&q->u.out.timer))
 933                         mod_timer(&q->u.out.timer, jiffies + 10 * HZ);
 934         return;
 935
 936 sched:
 937         if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
 938                 return;
 939         tasklet_schedule(&q->tasklet);
 940 }
 941
 942 /* outbound tasklet */
 943 void qdio_outbound_processing(unsigned long data)
 944 {
 945         struct qdio_q *q = (struct qdio_q *)data;
 946         __qdio_outbound_processing(q);
 947 }
 948
 949 void qdio_outbound_timer(unsigned long data)
 950 {
 951         struct qdio_q *q = (struct qdio_q *)data;
 952
 953         if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
 954                 return;
 955         tasklet_schedule(&q->tasklet);
 956 }
 957
 958 static inline void qdio_check_outbound_after_thinint(struct qdio_q *q)
 959 {
 960         struct qdio_q *out;
 961         int i;
 962
 963         if (!pci_out_supported(q))
 964                 return;
 965
 966         for_each_output_queue(q->irq_ptr, out, i)
 967                 if (!qdio_outbound_q_done(out))
 968                         tasklet_schedule(&out->tasklet);
 969 }
 970
 971 static void __tiqdio_inbound_processing(struct qdio_q *q)
 972 {
 973         qperf_inc(q, tasklet_inbound);
 974         if (need_siga_sync(q) && need_siga_sync_after_ai(q))
 975                 qdio_sync_queues(q);
 976
 977         /*
 978          * The interrupt could be caused by a PCI request. Check the
 979          * PCI capable outbound queues.
 980          */
 981         qdio_check_outbound_after_thinint(q);
 982
 983         if (!qdio_inbound_q_moved(q))
 984                 return;
 985
 986         qdio_kick_handler(q);
 987
 988         if (!qdio_inbound_q_done(q)) {
 989                 qperf_inc(q, tasklet_inbound_resched);
 990                 if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED)) {
 991                         tasklet_schedule(&q->tasklet);
 992                         return;
 993                 }
 994         }
 995
 996         qdio_stop_polling(q);
 997         /*
 998          * We need to check again to not lose initiative after
 999          * resetting the ACK state.
1000          */
1001         if (!qdio_inbound_q_done(q)) {
1002                 qperf_inc(q, tasklet_inbound_resched2);
1003                 if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
1004                         tasklet_schedule(&q->tasklet);
1005         }
1006 }
1007
1008 void tiqdio_inbound_processing(unsigned long data)
1009 {
1010         struct qdio_q *q = (struct qdio_q *)data;
1011         __tiqdio_inbound_processing(q);
1012 }
1013
1014 static inline void qdio_set_state(struct qdio_irq *irq_ptr,
1015                                   enum qdio_irq_states state)
1016 {
1017         DBF_DEV_EVENT(DBF_INFO, irq_ptr, "newstate: %1d", state);
1018
1019         irq_ptr->state = state;
1020         mb();
1021 }
1022
1023 static void qdio_irq_check_sense(struct qdio_irq *irq_ptr, struct irb *irb)
1024 {
1025         if (irb->esw.esw0.erw.cons) {
1026                 DBF_ERROR("%4x sense:", irq_ptr->schid.sch_no);
1027                 DBF_ERROR_HEX(irb, 64);
1028                 DBF_ERROR_HEX(irb->ecw, 64);
1029         }
1030 }
1031
1032 /* PCI interrupt handler */
1033 static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
1034 {
1035         int i;
1036         struct qdio_q *q;
1037
1038         if (unlikely(irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
1039                 return;
1040
1041         for_each_input_queue(irq_ptr, q, i) {
1042                 if (q->u.in.queue_start_poll) {
1043                         /* skip if polling is enabled or already in work */
1044                         if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
1045                                      &q->u.in.queue_irq_state)) {
1046                                 qperf_inc(q, int_discarded);
1047                                 continue;
1048                         }
1049                         q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr,
1050                                                  q->irq_ptr->int_parm);
1051                 } else {
1052                         tasklet_schedule(&q->tasklet);
1053                 }
1054         }
1055
1056         if (!pci_out_supported(q))
1057                 return;
1058
1059         for_each_output_queue(irq_ptr, q, i) {
1060                 if (qdio_outbound_q_done(q))
1061                         continue;
1062                 if (need_siga_sync(q) && need_siga_sync_out_after_pci(q))
1063                         qdio_siga_sync_q(q);
1064                 tasklet_schedule(&q->tasklet);
1065         }
1066 }
1067
1068 static void qdio_handle_activate_check(struct ccw_device *cdev,
1069                                 unsigned long intparm, int cstat, int dstat)
1070 {
1071         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1072         struct qdio_q *q;
1073
1074         DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no);
1075         DBF_ERROR("intp :%lx", intparm);
1076         DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
1077
1078         if (irq_ptr->nr_input_qs) {
1079                 q = irq_ptr->input_qs[0];
1080         } else if (irq_ptr->nr_output_qs) {
1081                 q = irq_ptr->output_qs[0];
1082         } else {
1083                 dump_stack();
1084                 goto no_handler;
1085         }
1086         q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION,
1087                    0, -1, -1, irq_ptr->int_parm);
1088 no_handler:
1089         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
1090 }
1091
1092 static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
1093                                       int dstat)
1094 {
1095         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1096
1097         DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq");
1098
1099         if (cstat)
1100                 goto error;
1101         if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END))
1102                 goto error;
1103         if (!(dstat & DEV_STAT_DEV_END))
1104                 goto error;
1105         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
1106         return;
1107
1108 error:
1109         DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no);
1110         DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
1111         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
1112 }
1113
1114 /* qdio interrupt handler */
1115 void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
1116                       struct irb *irb)
1117 {
1118         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1119         int cstat, dstat;
1120
1121         if (!intparm || !irq_ptr) {
1122                 DBF_ERROR("qint:%4x", cdev->private->schid.sch_no);
1123                 return;
1124         }
1125
1126         kstat_cpu(smp_processor_id()).irqs[IOINT_QDI]++;
1127         if (irq_ptr->perf_stat_enabled)
1128                 irq_ptr->perf_stat.qdio_int++;
1129
1130         if (IS_ERR(irb)) {
1131                 switch (PTR_ERR(irb)) {
1132                 case -EIO:
1133                         DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no);
1134                         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
1135                         wake_up(&cdev->private->wait_q);
1136                         return;
1137                 default:
1138                         WARN_ON(1);
1139                         return;
1140                 }
1141         }
1142         qdio_irq_check_sense(irq_ptr, irb);
1143         cstat = irb->scsw.cmd.cstat;
1144         dstat = irb->scsw.cmd.dstat;
1145
1146         switch (irq_ptr->state) {
1147         case QDIO_IRQ_STATE_INACTIVE:
1148                 qdio_establish_handle_irq(cdev, cstat, dstat);
1149                 break;
1150         case QDIO_IRQ_STATE_CLEANUP:
1151                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
1152                 break;
1153         case QDIO_IRQ_STATE_ESTABLISHED:
1154         case QDIO_IRQ_STATE_ACTIVE:
1155                 if (cstat & SCHN_STAT_PCI) {
1156                         qdio_int_handler_pci(irq_ptr);
1157                         return;
1158                 }
1159                 if (cstat || dstat)
1160                         qdio_handle_activate_check(cdev, intparm, cstat,
1161                                                    dstat);
1162                 break;
1163         case QDIO_IRQ_STATE_STOPPED:
1164                 break;
1165         default:
1166                 WARN_ON(1);
1167         }
1168         wake_up(&cdev->private->wait_q);
1169 }
1170
1171 /**
1172  * qdio_get_ssqd_desc - get qdio subchannel description
1173  * @cdev: ccw device to get description for
1174  * @data: where to store the ssqd
1175  *
1176  * Returns 0 or an error code. The results of the chsc are stored in the
1177  * specified structure.
1178  */
1179 int qdio_get_ssqd_desc(struct ccw_device *cdev,
1180                        struct qdio_ssqd_desc *data)
1181 {
1182
1183         if (!cdev || !cdev->private)
1184                 return -EINVAL;
1185
1186         DBF_EVENT("get ssqd:%4x", cdev->private->schid.sch_no);
1187         return qdio_setup_get_ssqd(NULL, &cdev->private->schid, data);
1188 }
1189 EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc);
1190
1191 static void qdio_shutdown_queues(struct ccw_device *cdev)
1192 {
1193         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1194         struct qdio_q *q;
1195         int i;
1196
1197         for_each_input_queue(irq_ptr, q, i)
1198                 tasklet_kill(&q->tasklet);
1199
1200         for_each_output_queue(irq_ptr, q, i) {
1201                 del_timer(&q->u.out.timer);
1202                 tasklet_kill(&q->tasklet);
1203         }
1204 }
1205
1206 /**
1207  * qdio_shutdown - shut down a qdio subchannel
1208  * @cdev: associated ccw device
1209  * @how: use halt or clear to shutdown
1210  */
1211 int qdio_shutdown(struct ccw_device *cdev, int how)
1212 {
1213         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1214         int rc;
1215         unsigned long flags;
1216
1217         if (!irq_ptr)
1218                 return -ENODEV;
1219
1220         BUG_ON(irqs_disabled());
1221         DBF_EVENT("qshutdown:%4x", cdev->private->schid.sch_no);
1222
1223         mutex_lock(&irq_ptr->setup_mutex);
1224         /*
1225          * Subchannel was already shot down. We cannot prevent being called
1226          * twice since cio may trigger a shutdown asynchronously.
1227          */
1228         if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) {
1229                 mutex_unlock(&irq_ptr->setup_mutex);
1230                 return 0;
1231         }
1232
1233         /*
1234          * Indicate that the device is going down. Scheduling the queue
1235          * tasklets is forbidden from here on.
1236          */
1237         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
1238
1239         tiqdio_remove_input_queues(irq_ptr);
1240         qdio_shutdown_queues(cdev);
1241         qdio_shutdown_debug_entries(irq_ptr, cdev);
1242
1243         /* cleanup subchannel */
1244         spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1245
1246         if (how & QDIO_FLAG_CLEANUP_USING_CLEAR)
1247                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
1248         else
1249                 /* default behaviour is halt */
1250                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
1251         if (rc) {
1252                 DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no);
1253                 DBF_ERROR("rc:%4d", rc);
1254                 goto no_cleanup;
1255         }
1256
1257         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
1258         spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1259         wait_event_interruptible_timeout(cdev->private->wait_q,
1260                 irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
1261                 irq_ptr->state == QDIO_IRQ_STATE_ERR,
1262                 10 * HZ);
1263         spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
1264
1265 no_cleanup:
1266         qdio_shutdown_thinint(irq_ptr);
1267
1268         /* restore interrupt handler */
1269         if ((void *)cdev->handler == (void *)qdio_int_handler)
1270                 cdev->handler = irq_ptr->orig_handler;
1271         spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
1272
1273         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
1274         mutex_unlock(&irq_ptr->setup_mutex);
1275         if (rc)
1276                 return rc;
1277         return 0;
1278 }
1279 EXPORT_SYMBOL_GPL(qdio_shutdown);
1280
1281 /**
1282  * qdio_free - free data structures for a qdio subchannel
1283  * @cdev: associated ccw device
1284  */
1285 int qdio_free(struct ccw_device *cdev)
1286 {
1287         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1288
1289         if (!irq_ptr)
1290                 return -ENODEV;
1291
1292         DBF_EVENT("qfree:%4x", cdev->private->schid.sch_no);
1293         mutex_lock(&irq_ptr->setup_mutex);
1294
1295         if (irq_ptr->debug_area != NULL) {
1296                 debug_unregister(irq_ptr->debug_area);
1297                 irq_ptr->debug_area = NULL;
1298         }
1299         cdev->private->qdio_data = NULL;
1300         mutex_unlock(&irq_ptr->setup_mutex);
1301
1302         qdio_release_memory(irq_ptr);
1303         return 0;
1304 }
1305 EXPORT_SYMBOL_GPL(qdio_free);
1306
1307 /**
1308  * qdio_allocate - allocate qdio queues and associated data
1309  * @init_data: initialization data
1310  */
1311 int qdio_allocate(struct qdio_initialize *init_data)
1312 {
1313         struct qdio_irq *irq_ptr;
1314
1315         DBF_EVENT("qallocate:%4x", init_data->cdev->private->schid.sch_no);
1316
1317         if ((init_data->no_input_qs && !init_data->input_handler) ||
1318             (init_data->no_output_qs && !init_data->output_handler))
1319                 return -EINVAL;
1320
1321         if ((init_data->no_input_qs > QDIO_MAX_QUEUES_PER_IRQ) ||
1322             (init_data->no_output_qs > QDIO_MAX_QUEUES_PER_IRQ))
1323                 return -EINVAL;
1324
1325         if ((!init_data->input_sbal_addr_array) ||
1326             (!init_data->output_sbal_addr_array))
1327                 return -EINVAL;
1328
1329         /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
1330         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1331         if (!irq_ptr)
1332                 goto out_err;
1333
1334         mutex_init(&irq_ptr->setup_mutex);
1335         qdio_allocate_dbf(init_data, irq_ptr);
1336
1337         /*
1338          * Allocate a page for the chsc calls in qdio_establish.
1339          * Must be pre-allocated since a zfcp recovery will call
1340          * qdio_establish. In case of low memory and swap on a zfcp disk
1341          * we may not be able to allocate memory otherwise.
1342          */
1343         irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL);
1344         if (!irq_ptr->chsc_page)
1345                 goto out_rel;
1346
1347         /* qdr is used in ccw1.cda which is u32 */
1348         irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1349         if (!irq_ptr->qdr)
1350                 goto out_rel;
1351         WARN_ON((unsigned long)irq_ptr->qdr & 0xfff);
1352
1353         if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs,
1354                              init_data->no_output_qs))
1355                 goto out_rel;
1356
1357         init_data->cdev->private->qdio_data = irq_ptr;
1358         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
1359         return 0;
1360 out_rel:
1361         qdio_release_memory(irq_ptr);
1362 out_err:
1363         return -ENOMEM;
1364 }
1365 EXPORT_SYMBOL_GPL(qdio_allocate);
1366
1367 static void qdio_detect_hsicq(struct qdio_irq *irq_ptr)
1368 {
1369         struct qdio_q *q = irq_ptr->input_qs[0];
1370         int i, use_cq = 0;
1371
1372         if (irq_ptr->nr_input_qs > 1 && queue_type(q) == QDIO_IQDIO_QFMT)
1373                 use_cq = 1;
1374
1375         for_each_output_queue(irq_ptr, q, i) {
1376                 if (use_cq) {
1377                         if (qdio_enable_async_operation(&q->u.out) < 0) {
1378                                 use_cq = 0;
1379                                 continue;
1380                         }
1381                 } else
1382                         qdio_disable_async_operation(&q->u.out);
1383         }
1384         DBF_EVENT("use_cq:%d", use_cq);
1385 }
1386
1387 /**
1388  * qdio_establish - establish queues on a qdio subchannel
1389  * @init_data: initialization data
1390  */
1391 int qdio_establish(struct qdio_initialize *init_data)
1392 {
1393         struct qdio_irq *irq_ptr;
1394         struct ccw_device *cdev = init_data->cdev;
1395         unsigned long saveflags;
1396         int rc;
1397
1398         DBF_EVENT("qestablish:%4x", cdev->private->schid.sch_no);
1399
1400         irq_ptr = cdev->private->qdio_data;
1401         if (!irq_ptr)
1402                 return -ENODEV;
1403
1404         if (cdev->private->state != DEV_STATE_ONLINE)
1405                 return -EINVAL;
1406
1407         mutex_lock(&irq_ptr->setup_mutex);
1408         qdio_setup_irq(init_data);
1409
1410         rc = qdio_establish_thinint(irq_ptr);
1411         if (rc) {
1412                 mutex_unlock(&irq_ptr->setup_mutex);
1413                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
1414                 return rc;
1415         }
1416
1417         /* establish q */
1418         irq_ptr->ccw.cmd_code = irq_ptr->equeue.cmd;
1419         irq_ptr->ccw.flags = CCW_FLAG_SLI;
1420         irq_ptr->ccw.count = irq_ptr->equeue.count;
1421         irq_ptr->ccw.cda = (u32)((addr_t)irq_ptr->qdr);
1422
1423         spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags);
1424         ccw_device_set_options_mask(cdev, 0);
1425
1426         rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0);
1427         if (rc) {
1428                 DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no);
1429                 DBF_ERROR("rc:%4x", rc);
1430         }
1431         spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
1432
1433         if (rc) {
1434                 mutex_unlock(&irq_ptr->setup_mutex);
1435                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
1436                 return rc;
1437         }
1438
1439         wait_event_interruptible_timeout(cdev->private->wait_q,
1440                 irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
1441                 irq_ptr->state == QDIO_IRQ_STATE_ERR, HZ);
1442
1443         if (irq_ptr->state != QDIO_IRQ_STATE_ESTABLISHED) {
1444                 mutex_unlock(&irq_ptr->setup_mutex);
1445                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
1446                 return -EIO;
1447         }
1448
1449         qdio_setup_ssqd_info(irq_ptr);
1450         DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac);
1451
1452         qdio_detect_hsicq(irq_ptr);
1453
1454         /* qebsm is now setup if available, initialize buffer states */
1455         qdio_init_buf_states(irq_ptr);
1456
1457         mutex_unlock(&irq_ptr->setup_mutex);
1458         qdio_print_subchannel_info(irq_ptr, cdev);
1459         qdio_setup_debug_entries(irq_ptr, cdev);
1460         return 0;
1461 }
1462 EXPORT_SYMBOL_GPL(qdio_establish);
1463
1464 /**
1465  * qdio_activate - activate queues on a qdio subchannel
1466  * @cdev: associated cdev
1467  */
1468 int qdio_activate(struct ccw_device *cdev)
1469 {
1470         struct qdio_irq *irq_ptr;
1471         int rc;
1472         unsigned long saveflags;
1473
1474         DBF_EVENT("qactivate:%4x", cdev->private->schid.sch_no);
1475
1476         irq_ptr = cdev->private->qdio_data;
1477         if (!irq_ptr)
1478                 return -ENODEV;
1479
1480         if (cdev->private->state != DEV_STATE_ONLINE)
1481                 return -EINVAL;
1482
1483         mutex_lock(&irq_ptr->setup_mutex);
1484         if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) {
1485                 rc = -EBUSY;
1486                 goto out;
1487         }
1488
1489         irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd;
1490         irq_ptr->ccw.flags = CCW_FLAG_SLI;
1491         irq_ptr->ccw.count = irq_ptr->aqueue.count;
1492         irq_ptr->ccw.cda = 0;
1493
1494         spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags);
1495         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
1496
1497         rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE,
1498                               0, DOIO_DENY_PREFETCH);
1499         if (rc) {
1500                 DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no);
1501                 DBF_ERROR("rc:%4x", rc);
1502         }
1503         spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags);
1504
1505         if (rc)
1506                 goto out;
1507
1508         if (is_thinint_irq(irq_ptr))
1509                 tiqdio_add_input_queues(irq_ptr);
1510
1511         /* wait for subchannel to become active */
1512         msleep(5);
1513
1514         switch (irq_ptr->state) {
1515         case QDIO_IRQ_STATE_STOPPED:
1516         case QDIO_IRQ_STATE_ERR:
1517                 rc = -EIO;
1518                 break;
1519         default:
1520                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
1521                 rc = 0;
1522         }
1523 out:
1524         mutex_unlock(&irq_ptr->setup_mutex);
1525         return rc;
1526 }
1527 EXPORT_SYMBOL_GPL(qdio_activate);
1528
1529 static inline int buf_in_between(int bufnr, int start, int count)
1530 {
1531         int end = add_buf(start, count);
1532
1533         if (end > start) {
1534                 if (bufnr >= start && bufnr < end)
1535                         return 1;
1536                 else
1537                         return 0;
1538         }
1539
1540         /* wrap-around case */
1541         if ((bufnr >= start && bufnr <= QDIO_MAX_BUFFERS_PER_Q) ||
1542             (bufnr < end))
1543                 return 1;
1544         else
1545                 return 0;
1546 }
1547
1548 /**
1549  * handle_inbound - reset processed input buffers
1550  * @q: queue containing the buffers
1551  * @callflags: flags
1552  * @bufnr: first buffer to process
1553  * @count: how many buffers are emptied
1554  */
1555 static int handle_inbound(struct qdio_q *q, unsigned int callflags,
1556                           int bufnr, int count)
1557 {
1558         int used, diff;
1559
1560         qperf_inc(q, inbound_call);
1561
1562         if (!q->u.in.polling)
1563                 goto set;
1564
1565         /* protect against stop polling setting an ACK for an emptied slsb */
1566         if (count == QDIO_MAX_BUFFERS_PER_Q) {
1567                 /* overwriting everything, just delete polling status */
1568                 q->u.in.polling = 0;
1569                 q->u.in.ack_count = 0;
1570                 goto set;
1571         } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) {
1572                 if (is_qebsm(q)) {
1573                         /* partial overwrite, just update ack_start */
1574                         diff = add_buf(bufnr, count);
1575                         diff = sub_buf(diff, q->u.in.ack_start);
1576                         q->u.in.ack_count -= diff;
1577                         if (q->u.in.ack_count <= 0) {
1578                                 q->u.in.polling = 0;
1579                                 q->u.in.ack_count = 0;
1580                                 goto set;
1581                         }
1582                         q->u.in.ack_start = add_buf(q->u.in.ack_start, diff);
1583                 }
1584                 else
1585                         /* the only ACK will be deleted, so stop polling */
1586                         q->u.in.polling = 0;
1587         }
1588
1589 set:
1590         count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count);
1591
1592         used = atomic_add_return(count, &q->nr_buf_used) - count;
1593         BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q);
1594
1595         /* no need to signal as long as the adapter had free buffers */
1596         if (used)
1597                 return 0;
1598
1599         if (need_siga_in(q))
1600                 return qdio_siga_input(q);
1601         return 0;
1602 }
1603
1604 /**
1605  * handle_outbound - process filled outbound buffers
1606  * @q: queue containing the buffers
1607  * @callflags: flags
1608  * @bufnr: first buffer to process
1609  * @count: how many buffers are filled
1610  */
1611 static int handle_outbound(struct qdio_q *q, unsigned int callflags,
1612                            int bufnr, int count)
1613 {
1614         unsigned char state = 0;
1615         int used, rc = 0;
1616
1617         qperf_inc(q, outbound_call);
1618
1619         count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count);
1620         used = atomic_add_return(count, &q->nr_buf_used);
1621         BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q);
1622
1623         if (used == QDIO_MAX_BUFFERS_PER_Q)
1624                 qperf_inc(q, outbound_queue_full);
1625
1626         if (callflags & QDIO_FLAG_PCI_OUT) {
1627                 q->u.out.pci_out_enabled = 1;
1628                 qperf_inc(q, pci_request_int);
1629         } else
1630                 q->u.out.pci_out_enabled = 0;
1631
1632         if (queue_type(q) == QDIO_IQDIO_QFMT) {
1633                 unsigned long phys_aob = 0;
1634
1635                 /* One SIGA-W per buffer required for unicast HSI */
1636                 WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
1637
1638                 phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
1639
1640                 rc = qdio_kick_outbound_q(q, phys_aob);
1641         } else if (need_siga_sync(q)) {
1642                 rc = qdio_siga_sync_q(q);
1643         } else {
1644                 /* try to fast requeue buffers */
1645                 get_buf_state(q, prev_buf(bufnr), &state, 0);
1646                 if (state != SLSB_CU_OUTPUT_PRIMED)
1647                         rc = qdio_kick_outbound_q(q, 0);
1648                 else
1649                         qperf_inc(q, fast_requeue);
1650         }
1651
1652         /* in case of SIGA errors we must process the error immediately */
1653         if (used >= q->u.out.scan_threshold || rc)
1654                 tasklet_schedule(&q->tasklet);
1655         else
1656                 /* free the SBALs in case of no further traffic */
1657                 if (!timer_pending(&q->u.out.timer))
1658                         mod_timer(&q->u.out.timer, jiffies + HZ);
1659         return rc;
1660 }
1661
1662 /**
1663  * do_QDIO - process input or output buffers
1664  * @cdev: associated ccw_device for the qdio subchannel
1665  * @callflags: input or output and special flags from the program
1666  * @q_nr: queue number
1667  * @bufnr: buffer number
1668  * @count: how many buffers to process
1669  */
1670 int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
1671             int q_nr, unsigned int bufnr, unsigned int count)
1672 {
1673         struct qdio_irq *irq_ptr;
1674
1675
1676         if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q)
1677                 return -EINVAL;
1678
1679         irq_ptr = cdev->private->qdio_data;
1680         if (!irq_ptr)
1681                 return -ENODEV;
1682
1683         DBF_DEV_EVENT(DBF_INFO, irq_ptr,
1684                       "do%02x b:%02x c:%02x", callflags, bufnr, count);
1685
1686         if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)
1687                 return -EBUSY;
1688         if (!count)
1689                 return 0;
1690         if (callflags & QDIO_FLAG_SYNC_INPUT)
1691                 return handle_inbound(irq_ptr->input_qs[q_nr],
1692                                       callflags, bufnr, count);
1693         else if (callflags & QDIO_FLAG_SYNC_OUTPUT)
1694                 return handle_outbound(irq_ptr->output_qs[q_nr],
1695                                        callflags, bufnr, count);
1696         return -EINVAL;
1697 }
1698 EXPORT_SYMBOL_GPL(do_QDIO);
1699
1700 /**
1701  * qdio_start_irq - process input buffers
1702  * @cdev: associated ccw_device for the qdio subchannel
1703  * @nr: input queue number
1704  *
1705  * Return codes
1706  *   0 - success
1707  *   1 - irqs not started since new data is available
1708  */
1709 int qdio_start_irq(struct ccw_device *cdev, int nr)
1710 {
1711         struct qdio_q *q;
1712         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1713
1714         if (!irq_ptr)
1715                 return -ENODEV;
1716         q = irq_ptr->input_qs[nr];
1717
1718         WARN_ON(queue_irqs_enabled(q));
1719
1720         if (!shared_ind(q))
1721                 xchg(q->irq_ptr->dsci, 0);
1722
1723         qdio_stop_polling(q);
1724         clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state);
1725
1726         /*
1727          * We need to check again to not lose initiative after
1728          * resetting the ACK state.
1729          */
1730         if (!shared_ind(q) && *q->irq_ptr->dsci)
1731                 goto rescan;
1732         if (!qdio_inbound_q_done(q))
1733                 goto rescan;
1734         return 0;
1735
1736 rescan:
1737         if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
1738                              &q->u.in.queue_irq_state))
1739                 return 0;
1740         else
1741                 return 1;
1742
1743 }
1744 EXPORT_SYMBOL(qdio_start_irq);
1745
1746 /**
1747  * qdio_get_next_buffers - process input buffers
1748  * @cdev: associated ccw_device for the qdio subchannel
1749  * @nr: input queue number
1750  * @bufnr: first filled buffer number
1751  * @error: buffers are in error state
1752  *
1753  * Return codes
1754  *   < 0 - error
1755  *   = 0 - no new buffers found
1756  *   > 0 - number of processed buffers
1757  */
1758 int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr,
1759                           int *error)
1760 {
1761         struct qdio_q *q;
1762         int start, end;
1763         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1764
1765         if (!irq_ptr)
1766                 return -ENODEV;
1767         q = irq_ptr->input_qs[nr];
1768         WARN_ON(queue_irqs_enabled(q));
1769
1770         /*
1771          * Cannot rely on automatic sync after interrupt since queues may
1772          * also be examined without interrupt.
1773          */
1774         if (need_siga_sync(q))
1775                 qdio_sync_queues(q);
1776
1777         /* check the PCI capable outbound queues. */
1778         qdio_check_outbound_after_thinint(q);
1779
1780         if (!qdio_inbound_q_moved(q))
1781                 return 0;
1782
1783         /* Note: upper-layer MUST stop processing immediately here ... */
1784         if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
1785                 return -EIO;
1786
1787         start = q->first_to_kick;
1788         end = q->first_to_check;
1789         *bufnr = start;
1790         *error = q->qdio_error;
1791
1792         /* for the next time */
1793         q->first_to_kick = end;
1794         q->qdio_error = 0;
1795         return sub_buf(end, start);
1796 }
1797 EXPORT_SYMBOL(qdio_get_next_buffers);
1798
1799 /**
1800  * qdio_stop_irq - disable interrupt processing for the device
1801  * @cdev: associated ccw_device for the qdio subchannel
1802  * @nr: input queue number
1803  *
1804  * Return codes
1805  *   0 - interrupts were already disabled
1806  *   1 - interrupts successfully disabled
1807  */
1808 int qdio_stop_irq(struct ccw_device *cdev, int nr)
1809 {
1810         struct qdio_q *q;
1811         struct qdio_irq *irq_ptr = cdev->private->qdio_data;
1812
1813         if (!irq_ptr)
1814                 return -ENODEV;
1815         q = irq_ptr->input_qs[nr];
1816
1817         if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED,
1818                              &q->u.in.queue_irq_state))
1819                 return 0;
1820         else
1821                 return 1;
1822 }
1823 EXPORT_SYMBOL(qdio_stop_irq);
1824
1825 static int __init init_QDIO(void)
1826 {
1827         int rc;
1828
1829         rc = qdio_debug_init();
1830         if (rc)
1831                 return rc;
1832         rc = qdio_setup_init();
1833         if (rc)
1834                 goto out_debug;
1835         rc = tiqdio_allocate_memory();
1836         if (rc)
1837                 goto out_cache;
1838         rc = tiqdio_register_thinints();
1839         if (rc)
1840                 goto out_ti;
1841         return 0;
1842
1843 out_ti:
1844         tiqdio_free_memory();
1845 out_cache:
1846         qdio_setup_exit();
1847 out_debug:
1848         qdio_debug_exit();
1849         return rc;
1850 }
1851
1852 static void __exit exit_QDIO(void)
1853 {
1854         tiqdio_unregister_thinints();
1855         tiqdio_free_memory();
1856         qdio_setup_exit();
1857         qdio_debug_exit();
1858 }
1859
1860 module_init(init_QDIO);
1861 module_exit(exit_QDIO);