2 * driver/s390/cio/qdio_setup.c
4 * qdio queue initialization
6 * Copyright (C) IBM Corp. 2008
7 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <linux/export.h>
20 #include "qdio_debug.h"
22 static struct kmem_cache
*qdio_q_cache
;
23 static struct kmem_cache
*qdio_aob_cache
;
25 struct qaob
*qdio_allocate_aob(void)
27 return kmem_cache_zalloc(qdio_aob_cache
, GFP_ATOMIC
);
29 EXPORT_SYMBOL_GPL(qdio_allocate_aob
);
31 void qdio_release_aob(struct qaob
*aob
)
33 kmem_cache_free(qdio_aob_cache
, aob
);
35 EXPORT_SYMBOL_GPL(qdio_release_aob
);
38 * qebsm is only available under 64bit but the adapter sets the feature
39 * flag anyway, so we manually override it.
41 static inline int qebsm_possible(void)
44 return css_general_characteristics
.qebsm
;
50 * qib_param_field: pointer to 128 bytes or NULL, if no param field
51 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
53 static void set_impl_params(struct qdio_irq
*irq_ptr
,
54 unsigned int qib_param_field_format
,
55 unsigned char *qib_param_field
,
56 unsigned long *input_slib_elements
,
57 unsigned long *output_slib_elements
)
65 irq_ptr
->qib
.pfmt
= qib_param_field_format
;
67 memcpy(irq_ptr
->qib
.parm
, qib_param_field
,
68 QDIO_MAX_BUFFERS_PER_Q
);
70 if (!input_slib_elements
)
73 for_each_input_queue(irq_ptr
, q
, i
) {
74 for (j
= 0; j
< QDIO_MAX_BUFFERS_PER_Q
; j
++)
75 q
->slib
->slibe
[j
].parms
=
76 input_slib_elements
[i
* QDIO_MAX_BUFFERS_PER_Q
+ j
];
79 if (!output_slib_elements
)
82 for_each_output_queue(irq_ptr
, q
, i
) {
83 for (j
= 0; j
< QDIO_MAX_BUFFERS_PER_Q
; j
++)
84 q
->slib
->slibe
[j
].parms
=
85 output_slib_elements
[i
* QDIO_MAX_BUFFERS_PER_Q
+ j
];
89 static int __qdio_allocate_qs(struct qdio_q
**irq_ptr_qs
, int nr_queues
)
94 for (i
= 0; i
< nr_queues
; i
++) {
95 q
= kmem_cache_alloc(qdio_q_cache
, GFP_KERNEL
);
99 q
->slib
= (struct slib
*) __get_free_page(GFP_KERNEL
);
101 kmem_cache_free(qdio_q_cache
, q
);
109 int qdio_allocate_qs(struct qdio_irq
*irq_ptr
, int nr_input_qs
, int nr_output_qs
)
113 rc
= __qdio_allocate_qs(irq_ptr
->input_qs
, nr_input_qs
);
116 rc
= __qdio_allocate_qs(irq_ptr
->output_qs
, nr_output_qs
);
120 static void setup_queues_misc(struct qdio_q
*q
, struct qdio_irq
*irq_ptr
,
121 qdio_handler_t
*handler
, int i
)
123 struct slib
*slib
= q
->slib
;
125 /* queue must be cleared for qdio_establish */
126 memset(q
, 0, sizeof(*q
));
127 memset(slib
, 0, PAGE_SIZE
);
129 q
->irq_ptr
= irq_ptr
;
130 q
->mask
= 1 << (31 - i
);
132 q
->handler
= handler
;
135 static void setup_storage_lists(struct qdio_q
*q
, struct qdio_irq
*irq_ptr
,
136 void **sbals_array
, int i
)
141 DBF_HEX(&q
, sizeof(void *));
142 q
->sl
= (struct sl
*)((char *)q
->slib
+ PAGE_SIZE
/ 2);
145 for (j
= 0; j
< QDIO_MAX_BUFFERS_PER_Q
; j
++) {
146 q
->sbal
[j
] = *sbals_array
++;
147 BUG_ON((unsigned long)q
->sbal
[j
] & 0xff);
152 prev
= (q
->is_input_q
) ? irq_ptr
->input_qs
[i
- 1]
153 : irq_ptr
->output_qs
[i
- 1];
154 prev
->slib
->nsliba
= (unsigned long)q
->slib
;
157 q
->slib
->sla
= (unsigned long)q
->sl
;
158 q
->slib
->slsba
= (unsigned long)&q
->slsb
.val
[0];
161 for (j
= 0; j
< QDIO_MAX_BUFFERS_PER_Q
; j
++)
162 q
->sl
->element
[j
].sbal
= (unsigned long)q
->sbal
[j
];
165 static void setup_queues(struct qdio_irq
*irq_ptr
,
166 struct qdio_initialize
*qdio_init
)
169 void **input_sbal_array
= qdio_init
->input_sbal_addr_array
;
170 void **output_sbal_array
= qdio_init
->output_sbal_addr_array
;
171 struct qdio_outbuf_state
*output_sbal_state_array
=
172 qdio_init
->output_sbal_state_array
;
175 for_each_input_queue(irq_ptr
, q
, i
) {
176 DBF_EVENT("inq:%1d", i
);
177 setup_queues_misc(q
, irq_ptr
, qdio_init
->input_handler
, i
);
180 q
->u
.in
.queue_start_poll
= qdio_init
->queue_start_poll_array
?
181 qdio_init
->queue_start_poll_array
[i
] : NULL
;
183 setup_storage_lists(q
, irq_ptr
, input_sbal_array
, i
);
184 input_sbal_array
+= QDIO_MAX_BUFFERS_PER_Q
;
186 if (is_thinint_irq(irq_ptr
)) {
187 tasklet_init(&q
->tasklet
, tiqdio_inbound_processing
,
190 tasklet_init(&q
->tasklet
, qdio_inbound_processing
,
195 for_each_output_queue(irq_ptr
, q
, i
) {
196 DBF_EVENT("outq:%1d", i
);
197 setup_queues_misc(q
, irq_ptr
, qdio_init
->output_handler
, i
);
199 q
->u
.out
.sbal_state
= output_sbal_state_array
;
200 output_sbal_state_array
+= QDIO_MAX_BUFFERS_PER_Q
;
203 q
->u
.out
.scan_threshold
= qdio_init
->scan_threshold
;
204 setup_storage_lists(q
, irq_ptr
, output_sbal_array
, i
);
205 output_sbal_array
+= QDIO_MAX_BUFFERS_PER_Q
;
207 tasklet_init(&q
->tasklet
, qdio_outbound_processing
,
209 setup_timer(&q
->u
.out
.timer
, (void(*)(unsigned long))
210 &qdio_outbound_timer
, (unsigned long)q
);
214 static void process_ac_flags(struct qdio_irq
*irq_ptr
, unsigned char qdioac
)
216 if (qdioac
& AC1_SIGA_INPUT_NEEDED
)
217 irq_ptr
->siga_flag
.input
= 1;
218 if (qdioac
& AC1_SIGA_OUTPUT_NEEDED
)
219 irq_ptr
->siga_flag
.output
= 1;
220 if (qdioac
& AC1_SIGA_SYNC_NEEDED
)
221 irq_ptr
->siga_flag
.sync
= 1;
222 if (!(qdioac
& AC1_AUTOMATIC_SYNC_ON_THININT
))
223 irq_ptr
->siga_flag
.sync_after_ai
= 1;
224 if (!(qdioac
& AC1_AUTOMATIC_SYNC_ON_OUT_PCI
))
225 irq_ptr
->siga_flag
.sync_out_after_pci
= 1;
228 static void check_and_setup_qebsm(struct qdio_irq
*irq_ptr
,
229 unsigned char qdioac
, unsigned long token
)
231 if (!(irq_ptr
->qib
.rflags
& QIB_RFLAGS_ENABLE_QEBSM
))
233 if (!(qdioac
& AC1_SC_QEBSM_AVAILABLE
) ||
234 (!(qdioac
& AC1_SC_QEBSM_ENABLED
)))
237 irq_ptr
->sch_token
= token
;
240 DBF_EVENT("%8lx", irq_ptr
->sch_token
);
244 irq_ptr
->sch_token
= 0;
245 irq_ptr
->qib
.rflags
&= ~QIB_RFLAGS_ENABLE_QEBSM
;
250 * If there is a qdio_irq we use the chsc_page and store the information
251 * in the qdio_irq, otherwise we copy it to the specified structure.
253 int qdio_setup_get_ssqd(struct qdio_irq
*irq_ptr
,
254 struct subchannel_id
*schid
,
255 struct qdio_ssqd_desc
*data
)
257 struct chsc_ssqd_area
*ssqd
;
260 DBF_EVENT("getssqd:%4x", schid
->sch_no
);
262 ssqd
= (struct chsc_ssqd_area
*)irq_ptr
->chsc_page
;
264 ssqd
= (struct chsc_ssqd_area
*)__get_free_page(GFP_KERNEL
);
265 memset(ssqd
, 0, PAGE_SIZE
);
267 ssqd
->request
= (struct chsc_header
) {
271 ssqd
->first_sch
= schid
->sch_no
;
272 ssqd
->last_sch
= schid
->sch_no
;
273 ssqd
->ssid
= schid
->ssid
;
277 rc
= chsc_error_from_response(ssqd
->response
.code
);
281 if (!(ssqd
->qdio_ssqd
.flags
& CHSC_FLAG_QDIO_CAPABILITY
) ||
282 !(ssqd
->qdio_ssqd
.flags
& CHSC_FLAG_VALIDITY
) ||
283 (ssqd
->qdio_ssqd
.sch
!= schid
->sch_no
))
287 memcpy(&irq_ptr
->ssqd_desc
, &ssqd
->qdio_ssqd
,
288 sizeof(struct qdio_ssqd_desc
));
290 memcpy(data
, &ssqd
->qdio_ssqd
,
291 sizeof(struct qdio_ssqd_desc
));
292 free_page((unsigned long)ssqd
);
297 void qdio_setup_ssqd_info(struct qdio_irq
*irq_ptr
)
299 unsigned char qdioac
;
302 rc
= qdio_setup_get_ssqd(irq_ptr
, &irq_ptr
->schid
, NULL
);
304 DBF_ERROR("%4x ssqd ERR", irq_ptr
->schid
.sch_no
);
305 DBF_ERROR("rc:%x", rc
);
306 /* all flags set, worst case */
307 qdioac
= AC1_SIGA_INPUT_NEEDED
| AC1_SIGA_OUTPUT_NEEDED
|
308 AC1_SIGA_SYNC_NEEDED
;
310 qdioac
= irq_ptr
->ssqd_desc
.qdioac1
;
312 check_and_setup_qebsm(irq_ptr
, qdioac
, irq_ptr
->ssqd_desc
.sch_token
);
313 process_ac_flags(irq_ptr
, qdioac
);
314 DBF_EVENT("qdioac:%4x", qdioac
);
317 void qdio_release_memory(struct qdio_irq
*irq_ptr
)
323 * Must check queue array manually since irq_ptr->nr_input_queues /
324 * irq_ptr->nr_input_queues may not yet be set.
326 for (i
= 0; i
< QDIO_MAX_QUEUES_PER_IRQ
; i
++) {
327 q
= irq_ptr
->input_qs
[i
];
329 free_page((unsigned long) q
->slib
);
330 kmem_cache_free(qdio_q_cache
, q
);
333 for (i
= 0; i
< QDIO_MAX_QUEUES_PER_IRQ
; i
++) {
334 q
= irq_ptr
->output_qs
[i
];
336 if (q
->u
.out
.use_cq
) {
339 for (n
= 0; n
< QDIO_MAX_BUFFERS_PER_Q
; ++n
) {
340 struct qaob
*aob
= q
->u
.out
.aobs
[n
];
342 qdio_release_aob(aob
);
343 q
->u
.out
.aobs
[n
] = NULL
;
347 qdio_disable_async_operation(&q
->u
.out
);
349 free_page((unsigned long) q
->slib
);
350 kmem_cache_free(qdio_q_cache
, q
);
353 free_page((unsigned long) irq_ptr
->qdr
);
354 free_page(irq_ptr
->chsc_page
);
355 free_page((unsigned long) irq_ptr
);
358 static void __qdio_allocate_fill_qdr(struct qdio_irq
*irq_ptr
,
359 struct qdio_q
**irq_ptr_qs
,
362 irq_ptr
->qdr
->qdf0
[i
+ nr
].sliba
=
363 (unsigned long)irq_ptr_qs
[i
]->slib
;
365 irq_ptr
->qdr
->qdf0
[i
+ nr
].sla
=
366 (unsigned long)irq_ptr_qs
[i
]->sl
;
368 irq_ptr
->qdr
->qdf0
[i
+ nr
].slsba
=
369 (unsigned long)&irq_ptr_qs
[i
]->slsb
.val
[0];
371 irq_ptr
->qdr
->qdf0
[i
+ nr
].akey
= PAGE_DEFAULT_KEY
>> 4;
372 irq_ptr
->qdr
->qdf0
[i
+ nr
].bkey
= PAGE_DEFAULT_KEY
>> 4;
373 irq_ptr
->qdr
->qdf0
[i
+ nr
].ckey
= PAGE_DEFAULT_KEY
>> 4;
374 irq_ptr
->qdr
->qdf0
[i
+ nr
].dkey
= PAGE_DEFAULT_KEY
>> 4;
377 static void setup_qdr(struct qdio_irq
*irq_ptr
,
378 struct qdio_initialize
*qdio_init
)
382 irq_ptr
->qdr
->qfmt
= qdio_init
->q_format
;
383 irq_ptr
->qdr
->ac
= qdio_init
->qdr_ac
;
384 irq_ptr
->qdr
->iqdcnt
= qdio_init
->no_input_qs
;
385 irq_ptr
->qdr
->oqdcnt
= qdio_init
->no_output_qs
;
386 irq_ptr
->qdr
->iqdsz
= sizeof(struct qdesfmt0
) / 4; /* size in words */
387 irq_ptr
->qdr
->oqdsz
= sizeof(struct qdesfmt0
) / 4;
388 irq_ptr
->qdr
->qiba
= (unsigned long)&irq_ptr
->qib
;
389 irq_ptr
->qdr
->qkey
= PAGE_DEFAULT_KEY
>> 4;
391 for (i
= 0; i
< qdio_init
->no_input_qs
; i
++)
392 __qdio_allocate_fill_qdr(irq_ptr
, irq_ptr
->input_qs
, i
, 0);
394 for (i
= 0; i
< qdio_init
->no_output_qs
; i
++)
395 __qdio_allocate_fill_qdr(irq_ptr
, irq_ptr
->output_qs
, i
,
396 qdio_init
->no_input_qs
);
399 static void setup_qib(struct qdio_irq
*irq_ptr
,
400 struct qdio_initialize
*init_data
)
402 if (qebsm_possible())
403 irq_ptr
->qib
.rflags
|= QIB_RFLAGS_ENABLE_QEBSM
;
405 irq_ptr
->qib
.rflags
|= init_data
->qib_rflags
;
407 irq_ptr
->qib
.qfmt
= init_data
->q_format
;
408 if (init_data
->no_input_qs
)
409 irq_ptr
->qib
.isliba
=
410 (unsigned long)(irq_ptr
->input_qs
[0]->slib
);
411 if (init_data
->no_output_qs
)
412 irq_ptr
->qib
.osliba
=
413 (unsigned long)(irq_ptr
->output_qs
[0]->slib
);
414 memcpy(irq_ptr
->qib
.ebcnam
, init_data
->adapter_name
, 8);
417 int qdio_setup_irq(struct qdio_initialize
*init_data
)
420 struct qdio_irq
*irq_ptr
= init_data
->cdev
->private->qdio_data
;
423 memset(&irq_ptr
->qib
, 0, sizeof(irq_ptr
->qib
));
424 memset(&irq_ptr
->siga_flag
, 0, sizeof(irq_ptr
->siga_flag
));
425 memset(&irq_ptr
->ccw
, 0, sizeof(irq_ptr
->ccw
));
426 memset(&irq_ptr
->ssqd_desc
, 0, sizeof(irq_ptr
->ssqd_desc
));
427 memset(&irq_ptr
->perf_stat
, 0, sizeof(irq_ptr
->perf_stat
));
429 irq_ptr
->debugfs_dev
= irq_ptr
->debugfs_perf
= NULL
;
430 irq_ptr
->sch_token
= irq_ptr
->state
= irq_ptr
->perf_stat_enabled
= 0;
432 /* wipes qib.ac, required by ar7063 */
433 memset(irq_ptr
->qdr
, 0, sizeof(struct qdr
));
435 irq_ptr
->int_parm
= init_data
->int_parm
;
436 irq_ptr
->nr_input_qs
= init_data
->no_input_qs
;
437 irq_ptr
->nr_output_qs
= init_data
->no_output_qs
;
439 irq_ptr
->schid
= ccw_device_get_subchannel_id(init_data
->cdev
);
440 irq_ptr
->cdev
= init_data
->cdev
;
441 setup_queues(irq_ptr
, init_data
);
443 setup_qib(irq_ptr
, init_data
);
444 qdio_setup_thinint(irq_ptr
);
445 set_impl_params(irq_ptr
, init_data
->qib_param_field_format
,
446 init_data
->qib_param_field
,
447 init_data
->input_slib_elements
,
448 init_data
->output_slib_elements
);
450 /* fill input and output descriptors */
451 setup_qdr(irq_ptr
, init_data
);
453 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
455 /* get qdio commands */
456 ciw
= ccw_device_get_ciw(init_data
->cdev
, CIW_TYPE_EQUEUE
);
458 DBF_ERROR("%4x NO EQ", irq_ptr
->schid
.sch_no
);
462 irq_ptr
->equeue
= *ciw
;
464 ciw
= ccw_device_get_ciw(init_data
->cdev
, CIW_TYPE_AQUEUE
);
466 DBF_ERROR("%4x NO AQ", irq_ptr
->schid
.sch_no
);
470 irq_ptr
->aqueue
= *ciw
;
472 /* set new interrupt handler */
473 irq_ptr
->orig_handler
= init_data
->cdev
->handler
;
474 init_data
->cdev
->handler
= qdio_int_handler
;
477 qdio_release_memory(irq_ptr
);
481 void qdio_print_subchannel_info(struct qdio_irq
*irq_ptr
,
482 struct ccw_device
*cdev
)
486 snprintf(s
, 80, "qdio: %s %s on SC %x using "
487 "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s\n",
488 dev_name(&cdev
->dev
),
489 (irq_ptr
->qib
.qfmt
== QDIO_QETH_QFMT
) ? "OSA" :
490 ((irq_ptr
->qib
.qfmt
== QDIO_ZFCP_QFMT
) ? "ZFCP" : "HS"),
491 irq_ptr
->schid
.sch_no
,
492 is_thinint_irq(irq_ptr
),
493 (irq_ptr
->sch_token
) ? 1 : 0,
494 (irq_ptr
->qib
.ac
& QIB_AC_OUTBOUND_PCI_SUPPORTED
) ? 1 : 0,
495 css_general_characteristics
.aif_tdd
,
496 (irq_ptr
->siga_flag
.input
) ? "R" : " ",
497 (irq_ptr
->siga_flag
.output
) ? "W" : " ",
498 (irq_ptr
->siga_flag
.sync
) ? "S" : " ",
499 (irq_ptr
->siga_flag
.sync_after_ai
) ? "A" : " ",
500 (irq_ptr
->siga_flag
.sync_out_after_pci
) ? "P" : " ");
501 printk(KERN_INFO
"%s", s
);
504 int qdio_enable_async_operation(struct qdio_output_q
*outq
)
506 outq
->aobs
= kzalloc(sizeof(struct qaob
*) * QDIO_MAX_BUFFERS_PER_Q
,
516 void qdio_disable_async_operation(struct qdio_output_q
*q
)
523 int __init
qdio_setup_init(void)
527 qdio_q_cache
= kmem_cache_create("qdio_q", sizeof(struct qdio_q
),
532 qdio_aob_cache
= kmem_cache_create("qdio_aob",
537 if (!qdio_aob_cache
) {
539 goto free_qdio_q_cache
;
542 /* Check for OSA/FCP thin interrupts (bit 67). */
543 DBF_EVENT("thinint:%1d",
544 (css_general_characteristics
.aif_osa
) ? 1 : 0);
546 /* Check for QEBSM support in general (bit 58). */
547 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
552 kmem_cache_destroy(qdio_q_cache
);
556 void qdio_setup_exit(void)
558 kmem_cache_destroy(qdio_aob_cache
);
559 kmem_cache_destroy(qdio_q_cache
);