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 <linux/gfp.h>
17 #include <asm/atomic.h>
18 #include <asm/debug.h>
25 #include "qdio_debug.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
);
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 qperf_inc(q
, eqbs_partial
);
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
);
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 qperf_inc(q
, sqbs_partial
);
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 static 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 inline 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 qperf_inc(q
, 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 static 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_clock();
342 if ((get_clock() - 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 qperf_inc(q
, siga_read
);
355 cc
= do_siga_input(q
->irq_ptr
->schid
, q
->mask
);
357 DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q
), cc
);
361 static inline void qdio_sync_after_thinint(struct qdio_q
*q
)
363 if (pci_out_supported(q
)) {
364 if (need_siga_sync_thinint(q
))
365 qdio_siga_sync_all(q
);
366 else if (need_siga_sync_out_thinint(q
))
367 qdio_siga_sync_out(q
);
372 int debug_get_buf_state(struct qdio_q
*q
, unsigned int bufnr
,
373 unsigned char *state
)
376 return get_buf_states(q
, bufnr
, state
, 1, 0);
379 static inline void qdio_stop_polling(struct qdio_q
*q
)
381 if (!q
->u
.in
.polling
)
385 qperf_inc(q
, stop_polling
);
387 /* show the card that we are not polling anymore */
389 set_buf_states(q
, q
->u
.in
.ack_start
, SLSB_P_INPUT_NOT_INIT
,
391 q
->u
.in
.ack_count
= 0;
393 set_buf_state(q
, q
->u
.in
.ack_start
, SLSB_P_INPUT_NOT_INIT
);
396 static inline void account_sbals(struct qdio_q
*q
, int count
)
400 q
->q_stats
.nr_sbal_total
+= count
;
401 if (count
== QDIO_MAX_BUFFERS_MASK
) {
402 q
->q_stats
.nr_sbals
[7]++;
407 q
->q_stats
.nr_sbals
[pos
]++;
410 static void announce_buffer_error(struct qdio_q
*q
, int count
)
412 q
->qdio_error
|= QDIO_ERROR_SLSB_STATE
;
414 /* special handling for no target buffer empty */
415 if ((!q
->is_input_q
&&
416 (q
->sbal
[q
->first_to_check
]->element
[15].flags
& 0xff) == 0x10)) {
417 qperf_inc(q
, target_full
);
418 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "OUTFULL FTC:%02x",
423 DBF_ERROR("%4x BUF ERROR", SCH_NO(q
));
424 DBF_ERROR((q
->is_input_q
) ? "IN:%2d" : "OUT:%2d", q
->nr
);
425 DBF_ERROR("FTC:%3d C:%3d", q
->first_to_check
, count
);
426 DBF_ERROR("F14:%2x F15:%2x",
427 q
->sbal
[q
->first_to_check
]->element
[14].flags
& 0xff,
428 q
->sbal
[q
->first_to_check
]->element
[15].flags
& 0xff);
431 static inline void inbound_primed(struct qdio_q
*q
, int count
)
435 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in prim: %02x", count
);
437 /* for QEBSM the ACK was already set by EQBS */
439 if (!q
->u
.in
.polling
) {
441 q
->u
.in
.ack_count
= count
;
442 q
->u
.in
.ack_start
= q
->first_to_check
;
446 /* delete the previous ACK's */
447 set_buf_states(q
, q
->u
.in
.ack_start
, SLSB_P_INPUT_NOT_INIT
,
449 q
->u
.in
.ack_count
= count
;
450 q
->u
.in
.ack_start
= q
->first_to_check
;
455 * ACK the newest buffer. The ACK will be removed in qdio_stop_polling
456 * or by the next inbound run.
458 new = add_buf(q
->first_to_check
, count
- 1);
459 if (q
->u
.in
.polling
) {
460 /* reset the previous ACK but first set the new one */
461 set_buf_state(q
, new, SLSB_P_INPUT_ACK
);
462 set_buf_state(q
, q
->u
.in
.ack_start
, SLSB_P_INPUT_NOT_INIT
);
465 set_buf_state(q
, new, SLSB_P_INPUT_ACK
);
468 q
->u
.in
.ack_start
= new;
472 /* need to change ALL buffers to get more interrupts */
473 set_buf_states(q
, q
->first_to_check
, SLSB_P_INPUT_NOT_INIT
, count
);
476 static int get_inbound_buffer_frontier(struct qdio_q
*q
)
482 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
485 count
= min(atomic_read(&q
->nr_buf_used
), QDIO_MAX_BUFFERS_MASK
);
486 stop
= add_buf(q
->first_to_check
, count
);
488 if (q
->first_to_check
== stop
)
492 * No siga sync here, as a PCI or we after a thin interrupt
493 * already sync'ed the queues.
495 count
= get_buf_states(q
, q
->first_to_check
, &state
, count
, 1);
500 case SLSB_P_INPUT_PRIMED
:
501 inbound_primed(q
, count
);
502 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
503 if (atomic_sub(count
, &q
->nr_buf_used
) == 0)
504 qperf_inc(q
, inbound_queue_full
);
505 if (q
->irq_ptr
->perf_stat_enabled
)
506 account_sbals(q
, count
);
508 case SLSB_P_INPUT_ERROR
:
509 announce_buffer_error(q
, count
);
510 /* process the buffer, the upper layer will take care of it */
511 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
512 atomic_sub(count
, &q
->nr_buf_used
);
513 if (q
->irq_ptr
->perf_stat_enabled
)
514 account_sbals_error(q
, count
);
516 case SLSB_CU_INPUT_EMPTY
:
517 case SLSB_P_INPUT_NOT_INIT
:
518 case SLSB_P_INPUT_ACK
:
519 if (q
->irq_ptr
->perf_stat_enabled
)
520 q
->q_stats
.nr_sbal_nop
++;
521 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in nop");
527 return q
->first_to_check
;
530 static int qdio_inbound_q_moved(struct qdio_q
*q
)
534 bufnr
= get_inbound_buffer_frontier(q
);
536 if ((bufnr
!= q
->last_move
) || q
->qdio_error
) {
537 q
->last_move
= bufnr
;
538 if (!is_thinint_irq(q
->irq_ptr
) && MACHINE_IS_LPAR
)
539 q
->u
.in
.timestamp
= get_clock();
545 static inline int qdio_inbound_q_done(struct qdio_q
*q
)
547 unsigned char state
= 0;
549 if (!atomic_read(&q
->nr_buf_used
))
553 get_buf_state(q
, q
->first_to_check
, &state
, 0);
555 if (state
== SLSB_P_INPUT_PRIMED
|| state
== SLSB_P_INPUT_ERROR
)
556 /* more work coming */
559 if (is_thinint_irq(q
->irq_ptr
))
562 /* don't poll under z/VM */
567 * At this point we know, that inbound first_to_check
568 * has (probably) not moved (see qdio_inbound_processing).
570 if (get_clock() > q
->u
.in
.timestamp
+ QDIO_INPUT_THRESHOLD
) {
571 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "in done:%02x",
578 static void qdio_kick_handler(struct qdio_q
*q
)
580 int start
= q
->first_to_kick
;
581 int end
= q
->first_to_check
;
584 if (unlikely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_ACTIVE
))
587 count
= sub_buf(end
, start
);
590 qperf_inc(q
, inbound_handler
);
591 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "kih s:%02x c:%02x", start
, count
);
593 qperf_inc(q
, outbound_handler
);
594 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "koh: s:%02x c:%02x",
598 q
->handler(q
->irq_ptr
->cdev
, q
->qdio_error
, q
->nr
, start
, count
,
599 q
->irq_ptr
->int_parm
);
601 /* for the next time */
602 q
->first_to_kick
= end
;
606 static void __qdio_inbound_processing(struct qdio_q
*q
)
608 qperf_inc(q
, tasklet_inbound
);
610 if (!qdio_inbound_q_moved(q
))
613 qdio_kick_handler(q
);
615 if (!qdio_inbound_q_done(q
)) {
616 /* means poll time is not yet over */
617 qperf_inc(q
, tasklet_inbound_resched
);
618 if (likely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_STOPPED
)) {
619 tasklet_schedule(&q
->tasklet
);
624 qdio_stop_polling(q
);
626 * We need to check again to not lose initiative after
627 * resetting the ACK state.
629 if (!qdio_inbound_q_done(q
)) {
630 qperf_inc(q
, tasklet_inbound_resched2
);
631 if (likely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_STOPPED
))
632 tasklet_schedule(&q
->tasklet
);
636 void qdio_inbound_processing(unsigned long data
)
638 struct qdio_q
*q
= (struct qdio_q
*)data
;
639 __qdio_inbound_processing(q
);
642 static int get_outbound_buffer_frontier(struct qdio_q
*q
)
647 if (((queue_type(q
) != QDIO_IQDIO_QFMT
) && !pci_out_supported(q
)) ||
648 (queue_type(q
) == QDIO_IQDIO_QFMT
&& multicast_outbound(q
)))
652 * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
655 count
= min(atomic_read(&q
->nr_buf_used
), QDIO_MAX_BUFFERS_MASK
);
656 stop
= add_buf(q
->first_to_check
, count
);
658 if (q
->first_to_check
== stop
)
659 return q
->first_to_check
;
661 count
= get_buf_states(q
, q
->first_to_check
, &state
, count
, 0);
663 return q
->first_to_check
;
666 case SLSB_P_OUTPUT_EMPTY
:
667 /* the adapter got it */
668 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out empty:%1d %02x", q
->nr
, count
);
670 atomic_sub(count
, &q
->nr_buf_used
);
671 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
672 if (q
->irq_ptr
->perf_stat_enabled
)
673 account_sbals(q
, count
);
675 case SLSB_P_OUTPUT_ERROR
:
676 announce_buffer_error(q
, count
);
677 /* process the buffer, the upper layer will take care of it */
678 q
->first_to_check
= add_buf(q
->first_to_check
, count
);
679 atomic_sub(count
, &q
->nr_buf_used
);
680 if (q
->irq_ptr
->perf_stat_enabled
)
681 account_sbals_error(q
, count
);
683 case SLSB_CU_OUTPUT_PRIMED
:
684 /* the adapter has not fetched the output yet */
685 if (q
->irq_ptr
->perf_stat_enabled
)
686 q
->q_stats
.nr_sbal_nop
++;
687 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out primed:%1d", q
->nr
);
689 case SLSB_P_OUTPUT_NOT_INIT
:
690 case SLSB_P_OUTPUT_HALTED
:
695 return q
->first_to_check
;
698 /* all buffers processed? */
699 static inline int qdio_outbound_q_done(struct qdio_q
*q
)
701 return atomic_read(&q
->nr_buf_used
) == 0;
704 static inline int qdio_outbound_q_moved(struct qdio_q
*q
)
708 bufnr
= get_outbound_buffer_frontier(q
);
710 if ((bufnr
!= q
->last_move
) || q
->qdio_error
) {
711 q
->last_move
= bufnr
;
712 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "out moved:%1d", q
->nr
);
718 static int qdio_kick_outbound_q(struct qdio_q
*q
)
720 unsigned int busy_bit
;
723 if (!need_siga_out(q
))
726 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-w:%1d", q
->nr
);
727 qperf_inc(q
, siga_write
);
729 cc
= qdio_siga_output(q
, &busy_bit
);
735 DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q
), q
->nr
);
736 cc
|= QDIO_ERROR_SIGA_BUSY
;
738 DBF_DEV_EVENT(DBF_INFO
, q
->irq_ptr
, "siga-w cc2:%1d", q
->nr
);
742 DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q
), cc
);
748 static void __qdio_outbound_processing(struct qdio_q
*q
)
750 qperf_inc(q
, tasklet_outbound
);
751 BUG_ON(atomic_read(&q
->nr_buf_used
) < 0);
753 if (qdio_outbound_q_moved(q
))
754 qdio_kick_handler(q
);
756 if (queue_type(q
) == QDIO_ZFCP_QFMT
)
757 if (!pci_out_supported(q
) && !qdio_outbound_q_done(q
))
760 /* bail out for HiperSockets unicast queues */
761 if (queue_type(q
) == QDIO_IQDIO_QFMT
&& !multicast_outbound(q
))
764 if ((queue_type(q
) == QDIO_IQDIO_QFMT
) &&
765 (atomic_read(&q
->nr_buf_used
)) > QDIO_IQDIO_POLL_LVL
)
768 if (q
->u
.out
.pci_out_enabled
)
772 * Now we know that queue type is either qeth without pci enabled
773 * or HiperSockets multicast. Make sure buffer switch from PRIMED to
774 * EMPTY is noticed and outbound_handler is called after some time.
776 if (qdio_outbound_q_done(q
))
777 del_timer(&q
->u
.out
.timer
);
779 if (!timer_pending(&q
->u
.out
.timer
))
780 mod_timer(&q
->u
.out
.timer
, jiffies
+ 10 * HZ
);
784 if (unlikely(q
->irq_ptr
->state
== QDIO_IRQ_STATE_STOPPED
))
786 tasklet_schedule(&q
->tasklet
);
789 /* outbound tasklet */
790 void qdio_outbound_processing(unsigned long data
)
792 struct qdio_q
*q
= (struct qdio_q
*)data
;
793 __qdio_outbound_processing(q
);
796 void qdio_outbound_timer(unsigned long data
)
798 struct qdio_q
*q
= (struct qdio_q
*)data
;
800 if (unlikely(q
->irq_ptr
->state
== QDIO_IRQ_STATE_STOPPED
))
802 tasklet_schedule(&q
->tasklet
);
805 static inline void qdio_check_outbound_after_thinint(struct qdio_q
*q
)
810 if (!pci_out_supported(q
))
813 for_each_output_queue(q
->irq_ptr
, out
, i
)
814 if (!qdio_outbound_q_done(out
))
815 tasklet_schedule(&out
->tasklet
);
818 static void __tiqdio_inbound_processing(struct qdio_q
*q
)
820 qperf_inc(q
, tasklet_inbound
);
821 qdio_sync_after_thinint(q
);
824 * The interrupt could be caused by a PCI request. Check the
825 * PCI capable outbound queues.
827 qdio_check_outbound_after_thinint(q
);
829 if (!qdio_inbound_q_moved(q
))
832 qdio_kick_handler(q
);
834 if (!qdio_inbound_q_done(q
)) {
835 qperf_inc(q
, tasklet_inbound_resched
);
836 if (likely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_STOPPED
)) {
837 tasklet_schedule(&q
->tasklet
);
842 qdio_stop_polling(q
);
844 * We need to check again to not lose initiative after
845 * resetting the ACK state.
847 if (!qdio_inbound_q_done(q
)) {
848 qperf_inc(q
, tasklet_inbound_resched2
);
849 if (likely(q
->irq_ptr
->state
!= QDIO_IRQ_STATE_STOPPED
))
850 tasklet_schedule(&q
->tasklet
);
854 void tiqdio_inbound_processing(unsigned long data
)
856 struct qdio_q
*q
= (struct qdio_q
*)data
;
857 __tiqdio_inbound_processing(q
);
860 static inline void qdio_set_state(struct qdio_irq
*irq_ptr
,
861 enum qdio_irq_states state
)
863 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "newstate: %1d", state
);
865 irq_ptr
->state
= state
;
869 static void qdio_irq_check_sense(struct qdio_irq
*irq_ptr
, struct irb
*irb
)
871 if (irb
->esw
.esw0
.erw
.cons
) {
872 DBF_ERROR("%4x sense:", irq_ptr
->schid
.sch_no
);
873 DBF_ERROR_HEX(irb
, 64);
874 DBF_ERROR_HEX(irb
->ecw
, 64);
878 /* PCI interrupt handler */
879 static void qdio_int_handler_pci(struct qdio_irq
*irq_ptr
)
884 if (unlikely(irq_ptr
->state
== QDIO_IRQ_STATE_STOPPED
))
887 for_each_input_queue(irq_ptr
, q
, i
)
888 tasklet_schedule(&q
->tasklet
);
890 if (!(irq_ptr
->qib
.ac
& QIB_AC_OUTBOUND_PCI_SUPPORTED
))
893 for_each_output_queue(irq_ptr
, q
, i
) {
894 if (qdio_outbound_q_done(q
))
897 if (!siga_syncs_out_pci(q
))
900 tasklet_schedule(&q
->tasklet
);
904 static void qdio_handle_activate_check(struct ccw_device
*cdev
,
905 unsigned long intparm
, int cstat
, int dstat
)
907 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
910 DBF_ERROR("%4x ACT CHECK", irq_ptr
->schid
.sch_no
);
911 DBF_ERROR("intp :%lx", intparm
);
912 DBF_ERROR("ds: %2x cs:%2x", dstat
, cstat
);
914 if (irq_ptr
->nr_input_qs
) {
915 q
= irq_ptr
->input_qs
[0];
916 } else if (irq_ptr
->nr_output_qs
) {
917 q
= irq_ptr
->output_qs
[0];
922 q
->handler(q
->irq_ptr
->cdev
, QDIO_ERROR_ACTIVATE_CHECK_CONDITION
,
923 0, -1, -1, irq_ptr
->int_parm
);
925 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_STOPPED
);
928 static void qdio_establish_handle_irq(struct ccw_device
*cdev
, int cstat
,
931 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
933 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
, "qest irq");
937 if (dstat
& ~(DEV_STAT_DEV_END
| DEV_STAT_CHN_END
))
939 if (!(dstat
& DEV_STAT_DEV_END
))
941 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ESTABLISHED
);
945 DBF_ERROR("%4x EQ:error", irq_ptr
->schid
.sch_no
);
946 DBF_ERROR("ds: %2x cs:%2x", dstat
, cstat
);
947 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ERR
);
950 /* qdio interrupt handler */
951 void qdio_int_handler(struct ccw_device
*cdev
, unsigned long intparm
,
954 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
957 if (!intparm
|| !irq_ptr
) {
958 DBF_ERROR("qint:%4x", cdev
->private->schid
.sch_no
);
962 if (irq_ptr
->perf_stat_enabled
)
963 irq_ptr
->perf_stat
.qdio_int
++;
966 switch (PTR_ERR(irb
)) {
968 DBF_ERROR("%4x IO error", irq_ptr
->schid
.sch_no
);
969 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ERR
);
970 wake_up(&cdev
->private->wait_q
);
977 qdio_irq_check_sense(irq_ptr
, irb
);
978 cstat
= irb
->scsw
.cmd
.cstat
;
979 dstat
= irb
->scsw
.cmd
.dstat
;
981 switch (irq_ptr
->state
) {
982 case QDIO_IRQ_STATE_INACTIVE
:
983 qdio_establish_handle_irq(cdev
, cstat
, dstat
);
985 case QDIO_IRQ_STATE_CLEANUP
:
986 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
988 case QDIO_IRQ_STATE_ESTABLISHED
:
989 case QDIO_IRQ_STATE_ACTIVE
:
990 if (cstat
& SCHN_STAT_PCI
) {
991 qdio_int_handler_pci(irq_ptr
);
995 qdio_handle_activate_check(cdev
, intparm
, cstat
,
998 case QDIO_IRQ_STATE_STOPPED
:
1003 wake_up(&cdev
->private->wait_q
);
1007 * qdio_get_ssqd_desc - get qdio subchannel description
1008 * @cdev: ccw device to get description for
1009 * @data: where to store the ssqd
1011 * Returns 0 or an error code. The results of the chsc are stored in the
1012 * specified structure.
1014 int qdio_get_ssqd_desc(struct ccw_device
*cdev
,
1015 struct qdio_ssqd_desc
*data
)
1018 if (!cdev
|| !cdev
->private)
1021 DBF_EVENT("get ssqd:%4x", cdev
->private->schid
.sch_no
);
1022 return qdio_setup_get_ssqd(NULL
, &cdev
->private->schid
, data
);
1024 EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc
);
1027 * qdio_cleanup - shutdown queues and free data structures
1028 * @cdev: associated ccw device
1029 * @how: use halt or clear to shutdown
1031 * This function calls qdio_shutdown() for @cdev with method @how.
1032 * and qdio_free(). The qdio_free() return value is ignored since
1033 * !irq_ptr is already checked.
1035 int qdio_cleanup(struct ccw_device
*cdev
, int how
)
1037 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1043 rc
= qdio_shutdown(cdev
, how
);
1048 EXPORT_SYMBOL_GPL(qdio_cleanup
);
1050 static void qdio_shutdown_queues(struct ccw_device
*cdev
)
1052 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1056 for_each_input_queue(irq_ptr
, q
, i
)
1057 tasklet_kill(&q
->tasklet
);
1059 for_each_output_queue(irq_ptr
, q
, i
) {
1060 del_timer(&q
->u
.out
.timer
);
1061 tasklet_kill(&q
->tasklet
);
1066 * qdio_shutdown - shut down a qdio subchannel
1067 * @cdev: associated ccw device
1068 * @how: use halt or clear to shutdown
1070 int qdio_shutdown(struct ccw_device
*cdev
, int how
)
1072 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1074 unsigned long flags
;
1079 BUG_ON(irqs_disabled());
1080 DBF_EVENT("qshutdown:%4x", cdev
->private->schid
.sch_no
);
1082 mutex_lock(&irq_ptr
->setup_mutex
);
1084 * Subchannel was already shot down. We cannot prevent being called
1085 * twice since cio may trigger a shutdown asynchronously.
1087 if (irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
) {
1088 mutex_unlock(&irq_ptr
->setup_mutex
);
1093 * Indicate that the device is going down. Scheduling the queue
1094 * tasklets is forbidden from here on.
1096 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_STOPPED
);
1098 tiqdio_remove_input_queues(irq_ptr
);
1099 qdio_shutdown_queues(cdev
);
1100 qdio_shutdown_debug_entries(irq_ptr
, cdev
);
1102 /* cleanup subchannel */
1103 spin_lock_irqsave(get_ccwdev_lock(cdev
), flags
);
1105 if (how
& QDIO_FLAG_CLEANUP_USING_CLEAR
)
1106 rc
= ccw_device_clear(cdev
, QDIO_DOING_CLEANUP
);
1108 /* default behaviour is halt */
1109 rc
= ccw_device_halt(cdev
, QDIO_DOING_CLEANUP
);
1111 DBF_ERROR("%4x SHUTD ERR", irq_ptr
->schid
.sch_no
);
1112 DBF_ERROR("rc:%4d", rc
);
1116 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_CLEANUP
);
1117 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), flags
);
1118 wait_event_interruptible_timeout(cdev
->private->wait_q
,
1119 irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
||
1120 irq_ptr
->state
== QDIO_IRQ_STATE_ERR
,
1122 spin_lock_irqsave(get_ccwdev_lock(cdev
), flags
);
1125 qdio_shutdown_thinint(irq_ptr
);
1127 /* restore interrupt handler */
1128 if ((void *)cdev
->handler
== (void *)qdio_int_handler
)
1129 cdev
->handler
= irq_ptr
->orig_handler
;
1130 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), flags
);
1132 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
1133 mutex_unlock(&irq_ptr
->setup_mutex
);
1138 EXPORT_SYMBOL_GPL(qdio_shutdown
);
1141 * qdio_free - free data structures for a qdio subchannel
1142 * @cdev: associated ccw device
1144 int qdio_free(struct ccw_device
*cdev
)
1146 struct qdio_irq
*irq_ptr
= cdev
->private->qdio_data
;
1151 DBF_EVENT("qfree:%4x", cdev
->private->schid
.sch_no
);
1152 mutex_lock(&irq_ptr
->setup_mutex
);
1154 if (irq_ptr
->debug_area
!= NULL
) {
1155 debug_unregister(irq_ptr
->debug_area
);
1156 irq_ptr
->debug_area
= NULL
;
1158 cdev
->private->qdio_data
= NULL
;
1159 mutex_unlock(&irq_ptr
->setup_mutex
);
1161 qdio_release_memory(irq_ptr
);
1164 EXPORT_SYMBOL_GPL(qdio_free
);
1167 * qdio_initialize - allocate and establish queues for a qdio subchannel
1168 * @init_data: initialization data
1170 * This function first allocates queues via qdio_allocate() and on success
1171 * establishes them via qdio_establish().
1173 int qdio_initialize(struct qdio_initialize
*init_data
)
1177 rc
= qdio_allocate(init_data
);
1181 rc
= qdio_establish(init_data
);
1183 qdio_free(init_data
->cdev
);
1186 EXPORT_SYMBOL_GPL(qdio_initialize
);
1189 * qdio_allocate - allocate qdio queues and associated data
1190 * @init_data: initialization data
1192 int qdio_allocate(struct qdio_initialize
*init_data
)
1194 struct qdio_irq
*irq_ptr
;
1196 DBF_EVENT("qallocate:%4x", init_data
->cdev
->private->schid
.sch_no
);
1198 if ((init_data
->no_input_qs
&& !init_data
->input_handler
) ||
1199 (init_data
->no_output_qs
&& !init_data
->output_handler
))
1202 if ((init_data
->no_input_qs
> QDIO_MAX_QUEUES_PER_IRQ
) ||
1203 (init_data
->no_output_qs
> QDIO_MAX_QUEUES_PER_IRQ
))
1206 if ((!init_data
->input_sbal_addr_array
) ||
1207 (!init_data
->output_sbal_addr_array
))
1210 /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */
1211 irq_ptr
= (void *) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
1215 mutex_init(&irq_ptr
->setup_mutex
);
1216 qdio_allocate_dbf(init_data
, irq_ptr
);
1219 * Allocate a page for the chsc calls in qdio_establish.
1220 * Must be pre-allocated since a zfcp recovery will call
1221 * qdio_establish. In case of low memory and swap on a zfcp disk
1222 * we may not be able to allocate memory otherwise.
1224 irq_ptr
->chsc_page
= get_zeroed_page(GFP_KERNEL
);
1225 if (!irq_ptr
->chsc_page
)
1228 /* qdr is used in ccw1.cda which is u32 */
1229 irq_ptr
->qdr
= (struct qdr
*) get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
1232 WARN_ON((unsigned long)irq_ptr
->qdr
& 0xfff);
1234 if (qdio_allocate_qs(irq_ptr
, init_data
->no_input_qs
,
1235 init_data
->no_output_qs
))
1238 init_data
->cdev
->private->qdio_data
= irq_ptr
;
1239 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_INACTIVE
);
1242 qdio_release_memory(irq_ptr
);
1246 EXPORT_SYMBOL_GPL(qdio_allocate
);
1249 * qdio_establish - establish queues on a qdio subchannel
1250 * @init_data: initialization data
1252 int qdio_establish(struct qdio_initialize
*init_data
)
1254 struct qdio_irq
*irq_ptr
;
1255 struct ccw_device
*cdev
= init_data
->cdev
;
1256 unsigned long saveflags
;
1259 DBF_EVENT("qestablish:%4x", cdev
->private->schid
.sch_no
);
1261 irq_ptr
= cdev
->private->qdio_data
;
1265 if (cdev
->private->state
!= DEV_STATE_ONLINE
)
1268 mutex_lock(&irq_ptr
->setup_mutex
);
1269 qdio_setup_irq(init_data
);
1271 rc
= qdio_establish_thinint(irq_ptr
);
1273 mutex_unlock(&irq_ptr
->setup_mutex
);
1274 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1279 irq_ptr
->ccw
.cmd_code
= irq_ptr
->equeue
.cmd
;
1280 irq_ptr
->ccw
.flags
= CCW_FLAG_SLI
;
1281 irq_ptr
->ccw
.count
= irq_ptr
->equeue
.count
;
1282 irq_ptr
->ccw
.cda
= (u32
)((addr_t
)irq_ptr
->qdr
);
1284 spin_lock_irqsave(get_ccwdev_lock(cdev
), saveflags
);
1285 ccw_device_set_options_mask(cdev
, 0);
1287 rc
= ccw_device_start(cdev
, &irq_ptr
->ccw
, QDIO_DOING_ESTABLISH
, 0, 0);
1289 DBF_ERROR("%4x est IO ERR", irq_ptr
->schid
.sch_no
);
1290 DBF_ERROR("rc:%4x", rc
);
1292 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), saveflags
);
1295 mutex_unlock(&irq_ptr
->setup_mutex
);
1296 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1300 wait_event_interruptible_timeout(cdev
->private->wait_q
,
1301 irq_ptr
->state
== QDIO_IRQ_STATE_ESTABLISHED
||
1302 irq_ptr
->state
== QDIO_IRQ_STATE_ERR
, HZ
);
1304 if (irq_ptr
->state
!= QDIO_IRQ_STATE_ESTABLISHED
) {
1305 mutex_unlock(&irq_ptr
->setup_mutex
);
1306 qdio_shutdown(cdev
, QDIO_FLAG_CLEANUP_USING_CLEAR
);
1310 qdio_setup_ssqd_info(irq_ptr
);
1311 DBF_EVENT("qDmmwc:%2x", irq_ptr
->ssqd_desc
.mmwc
);
1312 DBF_EVENT("qib ac:%4x", irq_ptr
->qib
.ac
);
1314 /* qebsm is now setup if available, initialize buffer states */
1315 qdio_init_buf_states(irq_ptr
);
1317 mutex_unlock(&irq_ptr
->setup_mutex
);
1318 qdio_print_subchannel_info(irq_ptr
, cdev
);
1319 qdio_setup_debug_entries(irq_ptr
, cdev
);
1322 EXPORT_SYMBOL_GPL(qdio_establish
);
1325 * qdio_activate - activate queues on a qdio subchannel
1326 * @cdev: associated cdev
1328 int qdio_activate(struct ccw_device
*cdev
)
1330 struct qdio_irq
*irq_ptr
;
1332 unsigned long saveflags
;
1334 DBF_EVENT("qactivate:%4x", cdev
->private->schid
.sch_no
);
1336 irq_ptr
= cdev
->private->qdio_data
;
1340 if (cdev
->private->state
!= DEV_STATE_ONLINE
)
1343 mutex_lock(&irq_ptr
->setup_mutex
);
1344 if (irq_ptr
->state
== QDIO_IRQ_STATE_INACTIVE
) {
1349 irq_ptr
->ccw
.cmd_code
= irq_ptr
->aqueue
.cmd
;
1350 irq_ptr
->ccw
.flags
= CCW_FLAG_SLI
;
1351 irq_ptr
->ccw
.count
= irq_ptr
->aqueue
.count
;
1352 irq_ptr
->ccw
.cda
= 0;
1354 spin_lock_irqsave(get_ccwdev_lock(cdev
), saveflags
);
1355 ccw_device_set_options(cdev
, CCWDEV_REPORT_ALL
);
1357 rc
= ccw_device_start(cdev
, &irq_ptr
->ccw
, QDIO_DOING_ACTIVATE
,
1358 0, DOIO_DENY_PREFETCH
);
1360 DBF_ERROR("%4x act IO ERR", irq_ptr
->schid
.sch_no
);
1361 DBF_ERROR("rc:%4x", rc
);
1363 spin_unlock_irqrestore(get_ccwdev_lock(cdev
), saveflags
);
1368 if (is_thinint_irq(irq_ptr
))
1369 tiqdio_add_input_queues(irq_ptr
);
1371 /* wait for subchannel to become active */
1374 switch (irq_ptr
->state
) {
1375 case QDIO_IRQ_STATE_STOPPED
:
1376 case QDIO_IRQ_STATE_ERR
:
1380 qdio_set_state(irq_ptr
, QDIO_IRQ_STATE_ACTIVE
);
1384 mutex_unlock(&irq_ptr
->setup_mutex
);
1387 EXPORT_SYMBOL_GPL(qdio_activate
);
1389 static inline int buf_in_between(int bufnr
, int start
, int count
)
1391 int end
= add_buf(start
, count
);
1394 if (bufnr
>= start
&& bufnr
< end
)
1400 /* wrap-around case */
1401 if ((bufnr
>= start
&& bufnr
<= QDIO_MAX_BUFFERS_PER_Q
) ||
1409 * handle_inbound - reset processed input buffers
1410 * @q: queue containing the buffers
1412 * @bufnr: first buffer to process
1413 * @count: how many buffers are emptied
1415 static int handle_inbound(struct qdio_q
*q
, unsigned int callflags
,
1416 int bufnr
, int count
)
1420 qperf_inc(q
, inbound_call
);
1422 if (!q
->u
.in
.polling
)
1425 /* protect against stop polling setting an ACK for an emptied slsb */
1426 if (count
== QDIO_MAX_BUFFERS_PER_Q
) {
1427 /* overwriting everything, just delete polling status */
1428 q
->u
.in
.polling
= 0;
1429 q
->u
.in
.ack_count
= 0;
1431 } else if (buf_in_between(q
->u
.in
.ack_start
, bufnr
, count
)) {
1433 /* partial overwrite, just update ack_start */
1434 diff
= add_buf(bufnr
, count
);
1435 diff
= sub_buf(diff
, q
->u
.in
.ack_start
);
1436 q
->u
.in
.ack_count
-= diff
;
1437 if (q
->u
.in
.ack_count
<= 0) {
1438 q
->u
.in
.polling
= 0;
1439 q
->u
.in
.ack_count
= 0;
1442 q
->u
.in
.ack_start
= add_buf(q
->u
.in
.ack_start
, diff
);
1445 /* the only ACK will be deleted, so stop polling */
1446 q
->u
.in
.polling
= 0;
1450 count
= set_buf_states(q
, bufnr
, SLSB_CU_INPUT_EMPTY
, count
);
1452 used
= atomic_add_return(count
, &q
->nr_buf_used
) - count
;
1453 BUG_ON(used
+ count
> QDIO_MAX_BUFFERS_PER_Q
);
1455 /* no need to signal as long as the adapter had free buffers */
1459 if (need_siga_in(q
))
1460 return qdio_siga_input(q
);
1465 * handle_outbound - process filled outbound buffers
1466 * @q: queue containing the buffers
1468 * @bufnr: first buffer to process
1469 * @count: how many buffers are filled
1471 static int handle_outbound(struct qdio_q
*q
, unsigned int callflags
,
1472 int bufnr
, int count
)
1474 unsigned char state
;
1477 qperf_inc(q
, outbound_call
);
1479 count
= set_buf_states(q
, bufnr
, SLSB_CU_OUTPUT_PRIMED
, count
);
1480 used
= atomic_add_return(count
, &q
->nr_buf_used
);
1481 BUG_ON(used
> QDIO_MAX_BUFFERS_PER_Q
);
1483 if (callflags
& QDIO_FLAG_PCI_OUT
) {
1484 q
->u
.out
.pci_out_enabled
= 1;
1485 qperf_inc(q
, pci_request_int
);
1488 q
->u
.out
.pci_out_enabled
= 0;
1490 if (queue_type(q
) == QDIO_IQDIO_QFMT
) {
1491 if (multicast_outbound(q
))
1492 rc
= qdio_kick_outbound_q(q
);
1494 if ((q
->irq_ptr
->ssqd_desc
.mmwc
> 1) &&
1496 (count
<= q
->irq_ptr
->ssqd_desc
.mmwc
)) {
1497 /* exploit enhanced SIGA */
1498 q
->u
.out
.use_enh_siga
= 1;
1499 rc
= qdio_kick_outbound_q(q
);
1502 * One siga-w per buffer required for unicast
1505 q
->u
.out
.use_enh_siga
= 0;
1507 rc
= qdio_kick_outbound_q(q
);
1515 if (need_siga_sync(q
)) {
1516 qdio_siga_sync_q(q
);
1520 /* try to fast requeue buffers */
1521 get_buf_state(q
, prev_buf(bufnr
), &state
, 0);
1522 if (state
!= SLSB_CU_OUTPUT_PRIMED
)
1523 rc
= qdio_kick_outbound_q(q
);
1525 qperf_inc(q
, fast_requeue
);
1528 tasklet_schedule(&q
->tasklet
);
1533 * do_QDIO - process input or output buffers
1534 * @cdev: associated ccw_device for the qdio subchannel
1535 * @callflags: input or output and special flags from the program
1536 * @q_nr: queue number
1537 * @bufnr: buffer number
1538 * @count: how many buffers to process
1540 int do_QDIO(struct ccw_device
*cdev
, unsigned int callflags
,
1541 int q_nr
, unsigned int bufnr
, unsigned int count
)
1543 struct qdio_irq
*irq_ptr
;
1545 if (bufnr
>= QDIO_MAX_BUFFERS_PER_Q
|| count
> QDIO_MAX_BUFFERS_PER_Q
)
1548 irq_ptr
= cdev
->private->qdio_data
;
1552 DBF_DEV_EVENT(DBF_INFO
, irq_ptr
,
1553 "do%02x b:%02x c:%02x", callflags
, bufnr
, count
);
1555 if (irq_ptr
->state
!= QDIO_IRQ_STATE_ACTIVE
)
1558 if (callflags
& QDIO_FLAG_SYNC_INPUT
)
1559 return handle_inbound(irq_ptr
->input_qs
[q_nr
],
1560 callflags
, bufnr
, count
);
1561 else if (callflags
& QDIO_FLAG_SYNC_OUTPUT
)
1562 return handle_outbound(irq_ptr
->output_qs
[q_nr
],
1563 callflags
, bufnr
, count
);
1566 EXPORT_SYMBOL_GPL(do_QDIO
);
1568 static int __init
init_QDIO(void)
1572 rc
= qdio_setup_init();
1575 rc
= tiqdio_allocate_memory();
1578 rc
= qdio_debug_init();
1581 rc
= tiqdio_register_thinints();
1589 tiqdio_free_memory();
1595 static void __exit
exit_QDIO(void)
1597 tiqdio_unregister_thinints();
1598 tiqdio_free_memory();
1603 module_init(init_QDIO
);
1604 module_exit(exit_QDIO
);