2 * linux/drivers/s390/cio/qdio_main.c
4 * Linux for s390 qdio support, buffer handling, qdio API and module support.
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>
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 <asm/atomic.h>
17 #include <asm/debug.h>
24 #include "qdio_debug.h"
25 #include "qdio_perf.h"
27 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\
28 "Jan Glauber <jang@linux.vnet.ibm.com>");
29 MODULE_DESCRIPTION("QDIO base support");
30 MODULE_LICENSE("GPL");
32 static inline int do_siga_sync(struct subchannel_id schid
,
33 unsigned int out_mask
, unsigned int in_mask
)
35 register unsigned long __fc
asm ("0") = 2;
36 register struct subchannel_id __schid
asm ("1") = schid
;
37 register unsigned long out
asm ("2") = out_mask
;
38 register unsigned long in
asm ("3") = in_mask
;
46 : "d" (__fc
), "d" (__schid
), "d" (out
), "d" (in
) : "cc");
50 static inline int do_siga_input(struct subchannel_id schid
, unsigned int mask
)
52 register unsigned long __fc
asm ("0") = 1;
53 register struct subchannel_id __schid
asm ("1") = schid
;
54 register unsigned long __mask
asm ("2") = mask
;
62 : "d" (__fc
), "d" (__schid
), "d" (__mask
) : "cc", "memory");
67 * do_siga_output - perform SIGA-w/wt function
68 * @schid: subchannel id or in case of QEBSM the subchannel token
69 * @mask: which output queues to process
70 * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer
71 * @fc: function code to perform
73 * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION.
74 * Note: For IQDC unicast queues only the highest priority queue is processed.
76 static inline int do_siga_output(unsigned long schid
, unsigned long mask
,
77 unsigned int *bb
, unsigned int fc
)
79 register unsigned long __fc
asm("0") = fc
;
80 register unsigned long __schid
asm("1") = schid
;
81 register unsigned long __mask
asm("2") = mask
;
82 int cc
= QDIO_ERROR_SIGA_ACCESS_EXCEPTION
;
90 : "+d" (cc
), "+d" (__fc
), "+d" (__schid
), "+d" (__mask
)
92 *bb
= ((unsigned int) __fc
) >> 31;
96 static inline int qdio_check_ccq(struct qdio_q
*q
, unsigned int ccq
)
98 /* all done or next buffer state different */
99 if (ccq
== 0 || ccq
== 32)
101 /* not all buffers processed */
102 if (ccq
== 96 || ccq
== 97)
104 /* notify devices immediately */
105 DBF_ERROR("%4x ccq:%3d", SCH_NO(q
), ccq
);
110 * qdio_do_eqbs - extract buffer states for QEBSM
111 * @q: queue to manipulate
112 * @state: state of the extracted buffers
113 * @start: buffer number to start at
114 * @count: count of buffers to examine
115 * @auto_ack: automatically acknowledge buffers
117 * Returns the number of successfully extracted equal buffer states.
118 * Stops processing if a state is different from the last buffers state.
120 static int qdio_do_eqbs(struct qdio_q
*q
, unsigned char *state
,
121 int start
, int count
, int auto_ack
)
123 unsigned int ccq
= 0;
124 int tmp_count
= count
, tmp_start
= start
;
128 BUG_ON(!q
->irq_ptr
->sch_token
);
129 qdio_perf_stat_inc(&perf_stats
.debug_eqbs_all
);
132 nr
+= q
->irq_ptr
->nr_input_qs
;
134 ccq
= do_eqbs(q
->irq_ptr
->sch_token
, state
, nr
, &tmp_start
, &tmp_count
,
136 rc
= qdio_check_ccq(q
, ccq
);
138 /* At least one buffer was processed, return and extract the remaining
141 if ((ccq
== 96) && (count
!= tmp_count
)) {
142 qdio_perf_stat_inc(&perf_stats
.debug_eqbs_incomplete
);
143 return (count
- tmp_count
);
147 DBF_DEV_EVENT(DBF_WARN
, q
->irq_ptr
, "EQBS again:%2d", ccq
);
152 DBF_ERROR("%4x EQBS ERROR", SCH_NO(q
));
153 DBF_ERROR("%3d%3d%2d", count
, tmp_count
, nr
);
154 q
->handler(q
->irq_ptr
->cdev
,
155 QDIO_ERROR_ACTIVATE_CHECK_CONDITION
,
156 0, -1, -1, q
->irq_ptr
->int_parm
);
159 return count
- tmp_count
;
163 * qdio_do_sqbs - set buffer states for QEBSM
164 * @q: queue to manipulate
165 * @state: new state of the buffers
166 * @start: first buffer number to change
167 * @count: how many buffers to change
169 * Returns the number of successfully changed buffers.
170 * Does retrying until the specified count of buffer states is set or an
173 static int qdio_do_sqbs(struct qdio_q
*q
, unsigned char state
, int start
,
176 unsigned int ccq
= 0;
177 int tmp_count
= count
, tmp_start
= start
;
184 BUG_ON(!q
->irq_ptr
->sch_token
);
185 qdio_perf_stat_inc(&perf_stats
.debug_sqbs_all
);
188 nr
+= q
->irq_ptr
->nr_input_qs
;
190 ccq
= do_sqbs(q
->irq_ptr
->sch_token
, state
, nr
, &tmp_start
, &tmp_count
);
191 rc
= qdio_check_ccq(q
, ccq
);
193 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "SQBS again:%2d", ccq
);
194 qdio_perf_stat_inc(&perf_stats
.debug_sqbs_incomplete
);
198 DBF_ERROR("%4x SQBS ERROR", SCH_NO(q
));
199 DBF_ERROR("%3d%3d%2d", count
, tmp_count
, nr
);
200 q
->handler(q
->irq_ptr
->cdev
,
201 QDIO_ERROR_ACTIVATE_CHECK_CONDITION
,
202 0, -1, -1, q
->irq_ptr
->int_parm
);
206 return count
- tmp_count
;
209 /* returns number of examined buffers and their common state in *state */
210 static inline int get_buf_states(struct qdio_q
*q
, unsigned int bufnr
,
211 unsigned char *state
, unsigned int count
,
214 unsigned char __state
= 0;
217 BUG_ON(bufnr
> QDIO_MAX_BUFFERS_MASK
);
218 BUG_ON(count
> QDIO_MAX_BUFFERS_PER_Q
);
221 return qdio_do_eqbs(q
, state
, bufnr
, count
, auto_ack
);
223 for (i
= 0; i
< count
; i
++) {
225 __state
= q
->slsb
.val
[bufnr
];
226 else if (q
->slsb
.val
[bufnr
] != __state
)
228 bufnr
= next_buf(bufnr
);
234 inline int get_buf_state(struct qdio_q
*q
, unsigned int bufnr
,
235 unsigned char *state
, int auto_ack
)
237 return get_buf_states(q
, bufnr
, state
, 1, auto_ack
);
240 /* wrap-around safe setting of slsb states, returns number of changed buffers */
241 static inline int set_buf_states(struct qdio_q
*q
, int bufnr
,
242 unsigned char state
, int count
)
246 BUG_ON(bufnr
> QDIO_MAX_BUFFERS_MASK
);
247 BUG_ON(count
> QDIO_MAX_BUFFERS_PER_Q
);
250 return qdio_do_sqbs(q
, state
, bufnr
, count
);
252 for (i
= 0; i
< count
; i
++) {
253 xchg(&q
->slsb
.val
[bufnr
], state
);
254 bufnr
= next_buf(bufnr
);
259 static inline int set_buf_state(struct qdio_q
*q
, int bufnr
,
262 return set_buf_states(q
, bufnr
, state
, 1);
265 /* set slsb states to initial state */
266 void qdio_init_buf_states(struct qdio_irq
*irq_ptr
)
271 for_each_input_queue(irq_ptr
, q
, i
)
272 set_buf_states(q
, 0, SLSB_P_INPUT_NOT_INIT
,
273 QDIO_MAX_BUFFERS_PER_Q
);
274 for_each_output_queue(irq_ptr
, q
, i
)
275 set_buf_states(q
, 0, SLSB_P_OUTPUT_NOT_INIT
,
276 QDIO_MAX_BUFFERS_PER_Q
);
279 static int qdio_siga_sync(struct qdio_q
*q
, unsigned int output
,
284 if (!need_siga_sync(q
))
287 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-s:%1d", q
->nr
);
288 qdio_perf_stat_inc(&perf_stats
.siga_sync
);
290 cc
= do_siga_sync(q
->irq_ptr
->schid
, output
, input
);
292 DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q
), cc
);
296 inline int qdio_siga_sync_q(struct qdio_q
*q
)
299 return qdio_siga_sync(q
, 0, q
->mask
);
301 return qdio_siga_sync(q
, q
->mask
, 0);
304 static inline int qdio_siga_sync_out(struct qdio_q
*q
)
306 return qdio_siga_sync(q
, ~0U, 0);
309 static inline int qdio_siga_sync_all(struct qdio_q
*q
)
311 return qdio_siga_sync(q
, ~0U, ~0U);
314 static int qdio_siga_output(struct qdio_q
*q
, unsigned int *busy_bit
)
321 if (q
->u
.out
.use_enh_siga
)
325 schid
= q
->irq_ptr
->sch_token
;
329 schid
= *((u32
*)&q
->irq_ptr
->schid
);
332 cc
= do_siga_output(schid
, q
->mask
, busy_bit
, fc
);
334 /* hipersocket busy condition */
336 WARN_ON(queue_type(q
) != QDIO_IQDIO_QFMT
|| cc
!= 2);
339 start_time
= get_usecs();
342 if ((get_usecs() - start_time
) < QDIO_BUSY_BIT_PATIENCE
)
348 static inline int qdio_siga_input(struct qdio_q
*q
)
352 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-r:%1d", q
->nr
);
353 qdio_perf_stat_inc(&perf_stats
.siga_in
);
355 cc
= do_siga_input(q
->irq_ptr
->schid
, q
->mask
);
357 DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q
), cc
);
361 /* called from thinint inbound handler */
362 void qdio_sync_after_thinint(struct qdio_q
*q
)
364 if (pci_out_supported(q
)) {
365 if (need_siga_sync_thinint(q
))
366 qdio_siga_sync_all(q
);
367 else if (need_siga_sync_out_thinint(q
))
368 qdio_siga_sync_out(q
);
373 inline void qdio_stop_polling(struct qdio_q
*q
)
375 if (!q
->u
.in
.polling
)
379 qdio_perf_stat_inc(&perf_stats
.debug_stop_polling
);
381 /* show the card that we are not polling anymore */
383 set_buf_states(q
, q
->last_move_ftc
, SLSB_P_INPUT_NOT_INIT
,
385 q
->u
.in
.ack_count
= 0;
387 set_buf_state(q
, q
->last_move_ftc
, SLSB_P_INPUT_NOT_INIT
);
390 static void announce_buffer_error(struct qdio_q
*q
, int count
)
392 q
->qdio_error
|= QDIO_ERROR_SLSB_STATE
;
394 /* special handling for no target buffer empty */
395 if ((!q
->is_input_q
&&
396 (q
->sbal
[q
->first_to_check
]->element
[15].flags
& 0xff) == 0x10)) {
397 qdio_perf_stat_inc(&perf_stats
.outbound_target_full
);
398 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "OUTFULL FTC:%3d",
403 DBF_ERROR("%4x BUF ERROR", SCH_NO(q
));
404 DBF_ERROR((q
->is_input_q
) ? "IN:%2d" : "OUT:%2d", q
->nr
);
405 DBF_ERROR("FTC:%3d C:%3d", q
->first_to_check
, count
);
406 DBF_ERROR("F14:%2x F15:%2x",
407 q
->sbal
[q
->first_to_check
]->element
[14].flags
& 0xff,
408 q
->sbal
[q
->first_to_check
]->element
[15].flags
& 0xff);
411 static inline void inbound_primed(struct qdio_q
*q
, int count
)
415 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in prim: %3d", count
);
417 /* for QEBSM the ACK was already set by EQBS */
419 if (!q
->u
.in
.polling
) {
421 q
->u
.in
.ack_count
= count
;
422 q
->last_move_ftc
= q
->first_to_check
;
426 /* delete the previous ACK's */
427 set_buf_states(q
, q
->last_move_ftc
, SLSB_P_INPUT_NOT_INIT
,
429 q
->u
.in
.ack_count
= count
;
430 q
->last_move_ftc
= q
->first_to_check
;
435 * ACK the newest buffer. The ACK will be removed in qdio_stop_polling
436 * or by the next inbound run.
438 new = add_buf(q
->first_to_check
, count
- 1);
439 if (q
->u
.in
.polling
) {
440 /* reset the previous ACK but first set the new one */
441 set_buf_state(q
, new, SLSB_P_INPUT_ACK
);
442 set_buf_state(q
, q
->last_move_ftc
, SLSB_P_INPUT_NOT_INIT
);
446 set_buf_state(q
, q
->first_to_check
, SLSB_P_INPUT_ACK
);
449 q
->last_move_ftc
= new;
455 * Need to change all PRIMED buffers to NOT_INIT, otherwise
456 * we're loosing initiative in the thinint code.
458 set_buf_states(q
, next_buf(q
->first_to_check
), SLSB_P_INPUT_NOT_INIT
,
462 static int get_inbound_buffer_frontier(struct qdio_q
*q
)
468 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
471 count
= min(atomic_read(&q
->nr_buf_used
), QDIO_MAX_BUFFERS_MASK
);
472 stop
= add_buf(q
->first_to_check
, count
);
475 * No siga sync here, as a PCI or we after a thin interrupt
476 * will sync the queues.
479 /* need to set count to 1 for non-qebsm */
484 if (q
->first_to_check
== stop
)
487 count
= get_buf_states(q
, q
->first_to_check
, &state
, count
, 1);
492 case SLSB_P_INPUT_PRIMED
:
493 inbound_primed(q
, count
);
495 * No siga-sync needed for non-qebsm here, as the inbound queue
496 * will be synced on the next siga-r, resp.
497 * tiqdio_is_inbound_q_done will do the siga-sync.
499 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
500 atomic_sub(count
, &q
->nr_buf_used
);
502 case SLSB_P_INPUT_ERROR
:
503 announce_buffer_error(q
, count
);
504 /* process the buffer, the upper layer will take care of it */
505 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
506 atomic_sub(count
, &q
->nr_buf_used
);
508 case SLSB_CU_INPUT_EMPTY
:
509 case SLSB_P_INPUT_NOT_INIT
:
510 case SLSB_P_INPUT_ACK
:
511 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in nop");
517 return q
->first_to_check
;
520 int qdio_inbound_q_moved(struct qdio_q
*q
)
524 bufnr
= get_inbound_buffer_frontier(q
);
526 if ((bufnr
!= q
->last_move_ftc
) || q
->qdio_error
) {
527 if (!need_siga_sync(q
) && !pci_out_supported(q
))
528 q
->u
.in
.timestamp
= get_usecs();
530 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in moved");
536 static int qdio_inbound_q_done(struct qdio_q
*q
)
538 unsigned char state
= 0;
540 if (!atomic_read(&q
->nr_buf_used
))
544 * We need that one for synchronization with the adapter, as it
545 * does a kind of PCI avoidance.
549 get_buf_state(q
, q
->first_to_check
, &state
, 0);
550 if (state
== SLSB_P_INPUT_PRIMED
)
551 /* we got something to do */
554 /* on VM, we don't poll, so the q is always done here */
555 if (need_siga_sync(q
) || pci_out_supported(q
))
559 * At this point we know, that inbound first_to_check
560 * has (probably) not moved (see qdio_inbound_processing).
562 if (get_usecs() > q
->u
.in
.timestamp
+ QDIO_INPUT_THRESHOLD
) {
563 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in done:%3d",
567 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in notd:%3d",
573 void qdio_kick_inbound_handler(struct qdio_q
*q
)
575 int count
, start
, end
;
577 qdio_perf_stat_inc(&perf_stats
.inbound_handler
);
579 start
= q
->first_to_kick
;
580 end
= q
->first_to_check
;
584 count
= end
+ QDIO_MAX_BUFFERS_PER_Q
- start
;
586 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "kih s:%3d c:%3d", start
, count
);
588 if (unlikely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_ACTIVE
))
591 q
->handler(q
->irq_ptr
->cdev
, q
->qdio_error
, q
->nr
,
592 start
, count
, q
->irq_ptr
->int_parm
);
594 /* for the next time */
595 q
->first_to_kick
= q
->first_to_check
;
599 static void __qdio_inbound_processing(struct qdio_q
*q
)
601 qdio_perf_stat_inc(&perf_stats
.tasklet_inbound
);
603 if (!qdio_inbound_q_moved(q
))
606 qdio_kick_inbound_handler(q
);
608 if (!qdio_inbound_q_done(q
))
609 /* means poll time is not yet over */
612 qdio_stop_polling(q
);
614 * We need to check again to not lose initiative after
615 * resetting the ACK state.
617 if (!qdio_inbound_q_done(q
))
621 /* inbound tasklet */
622 void qdio_inbound_processing(unsigned long data
)
624 struct qdio_q
*q
= (struct qdio_q
*)data
;
625 __qdio_inbound_processing(q
);
628 static int get_outbound_buffer_frontier(struct qdio_q
*q
)
633 if (((queue_type(q
) != QDIO_IQDIO_QFMT
) && !pci_out_supported(q
)) ||
634 (queue_type(q
) == QDIO_IQDIO_QFMT
&& multicast_outbound(q
)))
638 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
641 count
= min(atomic_read(&q
->nr_buf_used
), QDIO_MAX_BUFFERS_MASK
);
642 stop
= add_buf(q
->first_to_check
, count
);
644 /* need to set count to 1 for non-qebsm */
649 if (q
->first_to_check
== stop
)
650 return q
->first_to_check
;
652 count
= get_buf_states(q
, q
->first_to_check
, &state
, count
, 0);
654 return q
->first_to_check
;
657 case SLSB_P_OUTPUT_EMPTY
:
658 /* the adapter got it */
659 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out empty:%1d %3d", q
->nr
, count
);
661 atomic_sub(count
, &q
->nr_buf_used
);
662 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
664 * We fetch all buffer states at once. get_buf_states may
665 * return count < stop. For QEBSM we do not loop.
670 case SLSB_P_OUTPUT_ERROR
:
671 announce_buffer_error(q
, count
);
672 /* process the buffer, the upper layer will take care of it */
673 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
674 atomic_sub(count
, &q
->nr_buf_used
);
676 case SLSB_CU_OUTPUT_PRIMED
:
677 /* the adapter has not fetched the output yet */
678 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out primed:%1d", q
->nr
);
680 case SLSB_P_OUTPUT_NOT_INIT
:
681 case SLSB_P_OUTPUT_HALTED
:
686 return q
->first_to_check
;
689 /* all buffers processed? */
690 static inline int qdio_outbound_q_done(struct qdio_q
*q
)
692 return atomic_read(&q
->nr_buf_used
) == 0;
695 static inline int qdio_outbound_q_moved(struct qdio_q
*q
)
699 bufnr
= get_outbound_buffer_frontier(q
);
701 if ((bufnr
!= q
->last_move_ftc
) || q
->qdio_error
) {
702 q
->last_move_ftc
= bufnr
;
703 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out moved:%1d", q
->nr
);
709 static void qdio_kick_outbound_q(struct qdio_q
*q
)
711 unsigned int busy_bit
;
714 if (!need_siga_out(q
))
717 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-w:%1d", q
->nr
);
718 qdio_perf_stat_inc(&perf_stats
.siga_out
);
720 cc
= qdio_siga_output(q
, &busy_bit
);
726 DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q
), q
->nr
);
727 q
->qdio_error
= cc
| QDIO_ERROR_SIGA_BUSY
;
729 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-w cc2:%1d",
736 DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q
), cc
);
742 static void qdio_kick_outbound_handler(struct qdio_q
*q
)
744 int start
, end
, count
;
746 start
= q
->first_to_kick
;
747 end
= q
->last_move_ftc
;
751 count
= end
+ QDIO_MAX_BUFFERS_PER_Q
- start
;
753 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "kickouth: %1d", q
->nr
);
754 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "s:%3d c:%3d", start
, count
);
756 if (unlikely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_ACTIVE
))
759 q
->handler(q
->irq_ptr
->cdev
, q
->qdio_error
, q
->nr
, start
, count
,
760 q
->irq_ptr
->int_parm
);
762 /* for the next time: */
763 q
->first_to_kick
= q
->last_move_ftc
;
767 static void __qdio_outbound_processing(struct qdio_q
*q
)
771 qdio_perf_stat_inc(&perf_stats
.tasklet_outbound
);
772 spin_lock_irqsave(&q
->lock
, flags
);
774 BUG_ON(atomic_read(&q
->nr_buf_used
) < 0);
776 if (qdio_outbound_q_moved(q
))
777 qdio_kick_outbound_handler(q
);
779 spin_unlock_irqrestore(&q
->lock
, flags
);
781 if (queue_type(q
) == QDIO_ZFCP_QFMT
) {
782 if (!pci_out_supported(q
) && !qdio_outbound_q_done(q
))
783 tasklet_schedule(&q
->tasklet
);
787 /* bail out for HiperSockets unicast queues */
788 if (queue_type(q
) == QDIO_IQDIO_QFMT
&& !multicast_outbound(q
))
791 if ((queue_type(q
) == QDIO_IQDIO_QFMT
) &&
792 (atomic_read(&q
->nr_buf_used
)) > QDIO_IQDIO_POLL_LVL
) {
793 tasklet_schedule(&q
->tasklet
);
797 if (q
->u
.out
.pci_out_enabled
)
801 * Now we know that queue type is either qeth without pci enabled
802 * or HiperSockets multicast. Make sure buffer switch from PRIMED to
803 * EMPTY is noticed and outbound_handler is called after some time.
805 if (qdio_outbound_q_done(q
))
806 del_timer(&q
->u
.out
.timer
);
808 if (!timer_pending(&q
->u
.out
.timer
)) {
809 mod_timer(&q
->u
.out
.timer
, jiffies
+ 10 * HZ
);
810 qdio_perf_stat_inc(&perf_stats
.debug_tl_out_timer
);
815 /* outbound tasklet */
816 void qdio_outbound_processing(unsigned long data
)
818 struct qdio_q
*q
= (struct qdio_q
*)data
;
819 __qdio_outbound_processing(q
);
822 void qdio_outbound_timer(unsigned long data
)
824 struct qdio_q
*q
= (struct qdio_q
*)data
;
825 tasklet_schedule(&q
->tasklet
);
828 /* called from thinint inbound tasklet */
829 void qdio_check_outbound_after_thinint(struct qdio_q
*q
)
834 if (!pci_out_supported(q
))
837 for_each_output_queue(q
->irq_ptr
, out
, i
)
838 if (!qdio_outbound_q_done(out
))
839 tasklet_schedule(&out
->tasklet
);
842 static inline void qdio_set_state(struct qdio_irq
*irq_ptr
,
843 enum qdio_irq_states state
)
845 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "newstate: %1d", state
);
847 irq_ptr
->state
= state
;
851 static void qdio_irq_check_sense(struct qdio_irq
*irq_ptr
, struct irb
*irb
)
853 if (irb
->esw
.esw0
.erw
.cons
) {
854 DBF_ERROR("%4x sense:", irq_ptr
->schid
.sch_no
);
855 DBF_ERROR_HEX(irb
, 64);
856 DBF_ERROR_HEX(irb
->ecw
, 64);
860 /* PCI interrupt handler */
861 static void qdio_int_handler_pci(struct qdio_irq
*irq_ptr
)
866 qdio_perf_stat_inc(&perf_stats
.pci_int
);
868 for_each_input_queue(irq_ptr
, q
, i
)
869 tasklet_schedule(&q
->tasklet
);
871 if (!(irq_ptr
->qib
.ac
& QIB_AC_OUTBOUND_PCI_SUPPORTED
))
874 for_each_output_queue(irq_ptr
, q
, i
) {
875 if (qdio_outbound_q_done(q
))
878 if (!siga_syncs_out_pci(q
))
881 tasklet_schedule(&q
->tasklet
);
885 static void qdio_handle_activate_check(struct ccw_device
*cdev
,
886 unsigned long intparm
, int cstat
, int dstat
)
888 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
891 DBF_ERROR("%4x ACT CHECK", irq_ptr
->schid
.sch_no
);
892 DBF_ERROR("intp :%lx", intparm
);
893 DBF_ERROR("ds: %2x cs:%2x", dstat
, cstat
);
895 if (irq_ptr
->nr_input_qs
) {
896 q
= irq_ptr
->input_qs
[0];
897 } else if (irq_ptr
->nr_output_qs
) {
898 q
= irq_ptr
->output_qs
[0];
903 q
->handler(q
->irq_ptr
->cdev
, QDIO_ERROR_ACTIVATE_CHECK_CONDITION
,
904 0, -1, -1, irq_ptr
->int_parm
);
906 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_STOPPED
);
909 static void qdio_call_shutdown(struct work_struct
*work
)
911 struct ccw_device_private
*priv
;
912 struct ccw_device
*cdev
;
914 priv
= container_of(work
, struct ccw_device_private
, kick_work
);
916 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
917 put_device(&cdev
->dev
);
920 static void qdio_int_error(struct ccw_device
*cdev
)
922 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
924 switch (irq_ptr
->state
) {
925 case QDIO_IRQ_STATE_INACTIVE
:
926 case QDIO_IRQ_STATE_CLEANUP
:
927 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ERR
);
929 case QDIO_IRQ_STATE_ESTABLISHED
:
930 case QDIO_IRQ_STATE_ACTIVE
:
931 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_STOPPED
);
932 if (get_device(&cdev
->dev
)) {
933 /* Can't call shutdown from interrupt context. */
934 PREPARE_WORK(&cdev
->private->kick_work
,
936 queue_work(ccw_device_work
, &cdev
->private->kick_work
);
942 wake_up(&cdev
->private->wait_q
);
945 static int qdio_establish_check_errors(struct ccw_device
*cdev
, int cstat
,
948 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
950 if (cstat
|| (dstat
& ~(DEV_STAT_CHN_END
| DEV_STAT_DEV_END
))) {
951 DBF_ERROR("EQ:ck con");
955 if (!(dstat
& DEV_STAT_DEV_END
)) {
956 DBF_ERROR("EQ:no dev");
960 if (dstat
& ~(DEV_STAT_CHN_END
| DEV_STAT_DEV_END
)) {
961 DBF_ERROR("EQ: bad io");
966 DBF_ERROR("%4x EQ:error", irq_ptr
->schid
.sch_no
);
967 DBF_ERROR("ds: %2x cs:%2x", dstat
, cstat
);
969 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ERR
);
973 static void qdio_establish_handle_irq(struct ccw_device
*cdev
, int cstat
,
976 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
978 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "qest irq");
979 if (!qdio_establish_check_errors(cdev
, cstat
, dstat
))
980 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ESTABLISHED
);
983 /* qdio interrupt handler */
984 void qdio_int_handler(struct ccw_device
*cdev
, unsigned long intparm
,
987 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
990 qdio_perf_stat_inc(&perf_stats
.qdio_int
);
992 if (!intparm
|| !irq_ptr
) {
993 DBF_ERROR("qint:%4x", cdev
->private->schid
.sch_no
);
998 switch (PTR_ERR(irb
)) {
1000 DBF_ERROR("%4x IO error", irq_ptr
->schid
.sch_no
);
1003 DBF_ERROR("%4x IO timeout", irq_ptr
->schid
.sch_no
);
1004 qdio_int_error(cdev
);
1011 qdio_irq_check_sense(irq_ptr
, irb
);
1013 cstat
= irb
->scsw
.cmd
.cstat
;
1014 dstat
= irb
->scsw
.cmd
.dstat
;
1016 switch (irq_ptr
->state
) {
1017 case QDIO_IRQ_STATE_INACTIVE
:
1018 qdio_establish_handle_irq(cdev
, cstat
, dstat
);
1021 case QDIO_IRQ_STATE_CLEANUP
:
1022 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
1025 case QDIO_IRQ_STATE_ESTABLISHED
:
1026 case QDIO_IRQ_STATE_ACTIVE
:
1027 if (cstat
& SCHN_STAT_PCI
) {
1028 qdio_int_handler_pci(irq_ptr
);
1029 /* no state change so no need to wake up wait_q */
1032 if ((cstat
& ~SCHN_STAT_PCI
) || dstat
) {
1033 qdio_handle_activate_check(cdev
, intparm
, cstat
,
1040 wake_up(&cdev
->private->wait_q
);
1044 * qdio_get_ssqd_desc - get qdio subchannel description
1045 * @cdev: ccw device to get description for
1046 * @data: where to store the ssqd
1048 * Returns 0 or an error code. The results of the chsc are stored in the
1049 * specified structure.
1051 int qdio_get_ssqd_desc(struct ccw_device
*cdev
,
1052 struct qdio_ssqd_desc
*data
)
1055 if (!cdev
|| !cdev
->private)
1058 DBF_EVENT("get ssqd:%4x", cdev
->private->schid
.sch_no
);
1059 return qdio_setup_get_ssqd(NULL
, &cdev
->private->schid
, data
);
1061 EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc
);
1064 * qdio_cleanup - shutdown queues and free data structures
1065 * @cdev: associated ccw device
1066 * @how: use halt or clear to shutdown
1068 * This function calls qdio_shutdown() for @cdev with method @how
1069 * and on success qdio_free() for @cdev.
1071 int qdio_cleanup(struct ccw_device
*cdev
, int how
)
1073 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1079 rc
= qdio_shutdown(cdev
, how
);
1081 rc
= qdio_free(cdev
);
1084 EXPORT_SYMBOL_GPL(qdio_cleanup
);
1086 static void qdio_shutdown_queues(struct ccw_device
*cdev
)
1088 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1092 for_each_input_queue(irq_ptr
, q
, i
)
1093 tasklet_disable(&q
->tasklet
);
1095 for_each_output_queue(irq_ptr
, q
, i
) {
1096 tasklet_disable(&q
->tasklet
);
1097 del_timer(&q
->u
.out
.timer
);
1102 * qdio_shutdown - shut down a qdio subchannel
1103 * @cdev: associated ccw device
1104 * @how: use halt or clear to shutdown
1106 int qdio_shutdown(struct ccw_device
*cdev
, int how
)
1108 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1110 unsigned long flags
;
1115 BUG_ON(irqs_disabled());
1116 DBF_EVENT("qshutdown:%4x", cdev
->private->schid
.sch_no
);
1118 mutex_lock(&irq_ptr
->setup_mutex
);
1120 * Subchannel was already shot down. We cannot prevent being called
1121 * twice since cio may trigger a shutdown asynchronously.
1123 if (irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
) {
1124 mutex_unlock(&irq_ptr
->setup_mutex
);
1128 tiqdio_remove_input_queues(irq_ptr
);
1129 qdio_shutdown_queues(cdev
);
1130 qdio_shutdown_debug_entries(irq_ptr
, cdev
);
1132 /* cleanup subchannel */
1133 spin_lock_irqsave(get_ccwdev_lock(cdev
), flags
);
1135 if (how
& QDIO_FLAG_CLEANUP_USING_CLEAR
)
1136 rc
= ccw_device_clear(cdev
, QDIO_DOING_CLEANUP
);
1138 /* default behaviour is halt */
1139 rc
= ccw_device_halt(cdev
, QDIO_DOING_CLEANUP
);
1141 DBF_ERROR("%4x SHUTD ERR", irq_ptr
->schid
.sch_no
);
1142 DBF_ERROR("rc:%4d", rc
);
1146 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_CLEANUP
);
1147 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), flags
);
1148 wait_event_interruptible_timeout(cdev
->private->wait_q
,
1149 irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
||
1150 irq_ptr
->state
== QDIO_IRQ_STATE_ERR
,
1152 spin_lock_irqsave(get_ccwdev_lock(cdev
), flags
);
1155 qdio_shutdown_thinint(irq_ptr
);
1157 /* restore interrupt handler */
1158 if ((void *)cdev
->handler
== (void *)qdio_int_handler
)
1159 cdev
->handler
= irq_ptr
->orig_handler
;
1160 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), flags
);
1162 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
1163 mutex_unlock(&irq_ptr
->setup_mutex
);
1168 EXPORT_SYMBOL_GPL(qdio_shutdown
);
1171 * qdio_free - free data structures for a qdio subchannel
1172 * @cdev: associated ccw device
1174 int qdio_free(struct ccw_device
*cdev
)
1176 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1181 DBF_EVENT("qfree:%4x", cdev
->private->schid
.sch_no
);
1182 mutex_lock(&irq_ptr
->setup_mutex
);
1184 if (irq_ptr
->debug_area
!= NULL
) {
1185 debug_unregister(irq_ptr
->debug_area
);
1186 irq_ptr
->debug_area
= NULL
;
1188 cdev
->private->qdio_data
= NULL
;
1189 mutex_unlock(&irq_ptr
->setup_mutex
);
1191 qdio_release_memory(irq_ptr
);
1194 EXPORT_SYMBOL_GPL(qdio_free
);
1197 * qdio_initialize - allocate and establish queues for a qdio subchannel
1198 * @init_data: initialization data
1200 * This function first allocates queues via qdio_allocate() and on success
1201 * establishes them via qdio_establish().
1203 int qdio_initialize(struct qdio_initialize
*init_data
)
1207 rc
= qdio_allocate(init_data
);
1211 rc
= qdio_establish(init_data
);
1213 qdio_free(init_data
->cdev
);
1216 EXPORT_SYMBOL_GPL(qdio_initialize
);
1219 * qdio_allocate - allocate qdio queues and associated data
1220 * @init_data: initialization data
1222 int qdio_allocate(struct qdio_initialize
*init_data
)
1224 struct qdio_irq
*irq_ptr
;
1226 DBF_EVENT("qallocate:%4x", init_data
->cdev
->private->schid
.sch_no
);
1228 if ((init_data
->no_input_qs
&& !init_data
->input_handler
) ||
1229 (init_data
->no_output_qs
&& !init_data
->output_handler
))
1232 if ((init_data
->no_input_qs
> QDIO_MAX_QUEUES_PER_IRQ
) ||
1233 (init_data
->no_output_qs
> QDIO_MAX_QUEUES_PER_IRQ
))
1236 if ((!init_data
->input_sbal_addr_array
) ||
1237 (!init_data
->output_sbal_addr_array
))
1240 /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
1241 irq_ptr
= (void *) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
1245 mutex_init(&irq_ptr
->setup_mutex
);
1246 qdio_allocate_dbf(init_data
, irq_ptr
);
1249 * Allocate a page for the chsc calls in qdio_establish.
1250 * Must be pre-allocated since a zfcp recovery will call
1251 * qdio_establish. In case of low memory and swap on a zfcp disk
1252 * we may not be able to allocate memory otherwise.
1254 irq_ptr
->chsc_page
= get_zeroed_page(GFP_KERNEL
);
1255 if (!irq_ptr
->chsc_page
)
1258 /* qdr is used in ccw1.cda which is u32 */
1259 irq_ptr
->qdr
= (struct qdr
*) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
1262 WARN_ON((unsigned long)irq_ptr
->qdr
& 0xfff);
1264 if (qdio_allocate_qs(irq_ptr
, init_data
->no_input_qs
,
1265 init_data
->no_output_qs
))
1268 init_data
->cdev
->private->qdio_data
= irq_ptr
;
1269 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
1272 qdio_release_memory(irq_ptr
);
1276 EXPORT_SYMBOL_GPL(qdio_allocate
);
1279 * qdio_establish - establish queues on a qdio subchannel
1280 * @init_data: initialization data
1282 int qdio_establish(struct qdio_initialize
*init_data
)
1284 struct qdio_irq
*irq_ptr
;
1285 struct ccw_device
*cdev
= init_data
->cdev
;
1286 unsigned long saveflags
;
1289 DBF_EVENT("qestablish:%4x", cdev
->private->schid
.sch_no
);
1291 irq_ptr
= cdev
->private->qdio_data
;
1295 if (cdev
->private->state
!= DEV_STATE_ONLINE
)
1298 mutex_lock(&irq_ptr
->setup_mutex
);
1299 qdio_setup_irq(init_data
);
1301 rc
= qdio_establish_thinint(irq_ptr
);
1303 mutex_unlock(&irq_ptr
->setup_mutex
);
1304 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1309 irq_ptr
->ccw
.cmd_code
= irq_ptr
->equeue
.cmd
;
1310 irq_ptr
->ccw
.flags
= CCW_FLAG_SLI
;
1311 irq_ptr
->ccw
.count
= irq_ptr
->equeue
.count
;
1312 irq_ptr
->ccw
.cda
= (u32
)((addr_t
)irq_ptr
->qdr
);
1314 spin_lock_irqsave(get_ccwdev_lock(cdev
), saveflags
);
1315 ccw_device_set_options_mask(cdev
, 0);
1317 rc
= ccw_device_start(cdev
, &irq_ptr
->ccw
, QDIO_DOING_ESTABLISH
, 0, 0);
1319 DBF_ERROR("%4x est IO ERR", irq_ptr
->schid
.sch_no
);
1320 DBF_ERROR("rc:%4x", rc
);
1322 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), saveflags
);
1325 mutex_unlock(&irq_ptr
->setup_mutex
);
1326 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1330 wait_event_interruptible_timeout(cdev
->private->wait_q
,
1331 irq_ptr
->state
== QDIO_IRQ_STATE_ESTABLISHED
||
1332 irq_ptr
->state
== QDIO_IRQ_STATE_ERR
, HZ
);
1334 if (irq_ptr
->state
!= QDIO_IRQ_STATE_ESTABLISHED
) {
1335 mutex_unlock(&irq_ptr
->setup_mutex
);
1336 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1340 qdio_setup_ssqd_info(irq_ptr
);
1341 DBF_EVENT("qDmmwc:%2x", irq_ptr
->ssqd_desc
.mmwc
);
1342 DBF_EVENT("qib ac:%4x", irq_ptr
->qib
.ac
);
1344 /* qebsm is now setup if available, initialize buffer states */
1345 qdio_init_buf_states(irq_ptr
);
1347 mutex_unlock(&irq_ptr
->setup_mutex
);
1348 qdio_print_subchannel_info(irq_ptr
, cdev
);
1349 qdio_setup_debug_entries(irq_ptr
, cdev
);
1352 EXPORT_SYMBOL_GPL(qdio_establish
);
1355 * qdio_activate - activate queues on a qdio subchannel
1356 * @cdev: associated cdev
1358 int qdio_activate(struct ccw_device
*cdev
)
1360 struct qdio_irq
*irq_ptr
;
1362 unsigned long saveflags
;
1364 DBF_EVENT("qactivate:%4x", cdev
->private->schid
.sch_no
);
1366 irq_ptr
= cdev
->private->qdio_data
;
1370 if (cdev
->private->state
!= DEV_STATE_ONLINE
)
1373 mutex_lock(&irq_ptr
->setup_mutex
);
1374 if (irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
) {
1379 irq_ptr
->ccw
.cmd_code
= irq_ptr
->aqueue
.cmd
;
1380 irq_ptr
->ccw
.flags
= CCW_FLAG_SLI
;
1381 irq_ptr
->ccw
.count
= irq_ptr
->aqueue
.count
;
1382 irq_ptr
->ccw
.cda
= 0;
1384 spin_lock_irqsave(get_ccwdev_lock(cdev
), saveflags
);
1385 ccw_device_set_options(cdev
, CCWDEV_REPORT_ALL
);
1387 rc
= ccw_device_start(cdev
, &irq_ptr
->ccw
, QDIO_DOING_ACTIVATE
,
1388 0, DOIO_DENY_PREFETCH
);
1390 DBF_ERROR("%4x act IO ERR", irq_ptr
->schid
.sch_no
);
1391 DBF_ERROR("rc:%4x", rc
);
1393 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), saveflags
);
1398 if (is_thinint_irq(irq_ptr
))
1399 tiqdio_add_input_queues(irq_ptr
);
1401 /* wait for subchannel to become active */
1404 switch (irq_ptr
->state
) {
1405 case QDIO_IRQ_STATE_STOPPED
:
1406 case QDIO_IRQ_STATE_ERR
:
1410 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ACTIVE
);
1414 mutex_unlock(&irq_ptr
->setup_mutex
);
1417 EXPORT_SYMBOL_GPL(qdio_activate
);
1419 static inline int buf_in_between(int bufnr
, int start
, int count
)
1421 int end
= add_buf(start
, count
);
1424 if (bufnr
>= start
&& bufnr
< end
)
1430 /* wrap-around case */
1431 if ((bufnr
>= start
&& bufnr
<= QDIO_MAX_BUFFERS_PER_Q
) ||
1439 * handle_inbound - reset processed input buffers
1440 * @q: queue containing the buffers
1442 * @bufnr: first buffer to process
1443 * @count: how many buffers are emptied
1445 static void handle_inbound(struct qdio_q
*q
, unsigned int callflags
,
1446 int bufnr
, int count
)
1450 if (!q
->u
.in
.polling
)
1453 /* protect against stop polling setting an ACK for an emptied slsb */
1454 if (count
== QDIO_MAX_BUFFERS_PER_Q
) {
1455 /* overwriting everything, just delete polling status */
1456 q
->u
.in
.polling
= 0;
1457 q
->u
.in
.ack_count
= 0;
1459 } else if (buf_in_between(q
->last_move_ftc
, bufnr
, count
)) {
1461 /* partial overwrite, just update last_move_ftc */
1462 diff
= add_buf(bufnr
, count
);
1463 diff
= sub_buf(diff
, q
->last_move_ftc
);
1464 q
->u
.in
.ack_count
-= diff
;
1465 if (q
->u
.in
.ack_count
<= 0) {
1466 q
->u
.in
.polling
= 0;
1467 q
->u
.in
.ack_count
= 0;
1468 /* TODO: must we set last_move_ftc to something meaningful? */
1471 q
->last_move_ftc
= add_buf(q
->last_move_ftc
, diff
);
1474 /* the only ACK will be deleted, so stop polling */
1475 q
->u
.in
.polling
= 0;
1479 count
= set_buf_states(q
, bufnr
, SLSB_CU_INPUT_EMPTY
, count
);
1481 used
= atomic_add_return(count
, &q
->nr_buf_used
) - count
;
1482 BUG_ON(used
+ count
> QDIO_MAX_BUFFERS_PER_Q
);
1484 /* no need to signal as long as the adapter had free buffers */
1488 if (need_siga_in(q
)) {
1489 cc
= qdio_siga_input(q
);
1496 * handle_outbound - process filled outbound buffers
1497 * @q: queue containing the buffers
1499 * @bufnr: first buffer to process
1500 * @count: how many buffers are filled
1502 static void handle_outbound(struct qdio_q
*q
, unsigned int callflags
,
1503 int bufnr
, int count
)
1505 unsigned char state
;
1508 qdio_perf_stat_inc(&perf_stats
.outbound_handler
);
1510 count
= set_buf_states(q
, bufnr
, SLSB_CU_OUTPUT_PRIMED
, count
);
1511 used
= atomic_add_return(count
, &q
->nr_buf_used
);
1512 BUG_ON(used
> QDIO_MAX_BUFFERS_PER_Q
);
1514 if (callflags
& QDIO_FLAG_PCI_OUT
)
1515 q
->u
.out
.pci_out_enabled
= 1;
1517 q
->u
.out
.pci_out_enabled
= 0;
1519 if (queue_type(q
) == QDIO_IQDIO_QFMT
) {
1520 if (multicast_outbound(q
))
1521 qdio_kick_outbound_q(q
);
1523 if ((q
->irq_ptr
->ssqd_desc
.mmwc
> 1) &&
1525 (count
<= q
->irq_ptr
->ssqd_desc
.mmwc
)) {
1526 /* exploit enhanced SIGA */
1527 q
->u
.out
.use_enh_siga
= 1;
1528 qdio_kick_outbound_q(q
);
1531 * One siga-w per buffer required for unicast
1534 q
->u
.out
.use_enh_siga
= 0;
1536 qdio_kick_outbound_q(q
);
1539 /* report CC=2 conditions synchronously */
1541 __qdio_outbound_processing(q
);
1545 if (need_siga_sync(q
)) {
1546 qdio_siga_sync_q(q
);
1550 /* try to fast requeue buffers */
1551 get_buf_state(q
, prev_buf(bufnr
), &state
, 0);
1552 if (state
!= SLSB_CU_OUTPUT_PRIMED
)
1553 qdio_kick_outbound_q(q
);
1555 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "fast-req");
1556 qdio_perf_stat_inc(&perf_stats
.fast_requeue
);
1559 /* Fixme: could wait forever if called from process context */
1560 tasklet_schedule(&q
->tasklet
);
1564 * do_QDIO - process input or output buffers
1565 * @cdev: associated ccw_device for the qdio subchannel
1566 * @callflags: input or output and special flags from the program
1567 * @q_nr: queue number
1568 * @bufnr: buffer number
1569 * @count: how many buffers to process
1571 int do_QDIO(struct ccw_device
*cdev
, unsigned int callflags
,
1572 int q_nr
, int bufnr
, int count
)
1574 struct qdio_irq
*irq_ptr
;
1576 if ((bufnr
> QDIO_MAX_BUFFERS_PER_Q
) ||
1577 (count
> QDIO_MAX_BUFFERS_PER_Q
) ||
1578 (q_nr
> QDIO_MAX_QUEUES_PER_IRQ
))
1584 irq_ptr
= cdev
->private->qdio_data
;
1588 if (callflags
& QDIO_FLAG_SYNC_INPUT
)
1589 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "doQDIO input");
1591 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "doQDIO output");
1592 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "q:%1d flag:%4x", q_nr
, callflags
);
1593 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "buf:%2d cnt:%3d", bufnr
, count
);
1595 if (irq_ptr
->state
!= QDIO_IRQ_STATE_ACTIVE
)
1598 if (callflags
& QDIO_FLAG_SYNC_INPUT
)
1599 handle_inbound(irq_ptr
->input_qs
[q_nr
], callflags
, bufnr
,
1601 else if (callflags
& QDIO_FLAG_SYNC_OUTPUT
)
1602 handle_outbound(irq_ptr
->output_qs
[q_nr
], callflags
, bufnr
,
1608 EXPORT_SYMBOL_GPL(do_QDIO
);
1610 static int __init
init_QDIO(void)
1614 rc
= qdio_setup_init();
1617 rc
= tiqdio_allocate_memory();
1620 rc
= qdio_debug_init();
1623 rc
= qdio_setup_perf_stats();
1626 rc
= tiqdio_register_thinints();
1632 qdio_remove_perf_stats();
1636 tiqdio_free_memory();
1642 static void __exit
exit_QDIO(void)
1644 tiqdio_unregister_thinints();
1645 tiqdio_free_memory();
1646 qdio_remove_perf_stats();
1651 module_init(init_QDIO
);
1652 module_exit(exit_QDIO
);