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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux/fpc-iii.git] / drivers / s390 / cio / qdio_setup.c
blob6326b67c45d27982e986f9baa835951a92eb3fad
1 /*
2 * driver/s390/cio/qdio_setup.c
3 *
4 * qdio queue initialization
5 *
6 * Copyright (C) IBM Corp. 2008
7 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
8 */
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <asm/qdio.h>
12
13 #include "cio.h"
14 #include "css.h"
15 #include "device.h"
16 #include "ioasm.h"
17 #include "chsc.h"
18 #include "qdio.h"
19 #include "qdio_debug.h"
20
21 static struct kmem_cache *qdio_q_cache;
22
23 /*
24 * qebsm is only available under 64bit but the adapter sets the feature
25 * flag anyway, so we manually override it.
26 */
27 static inline int qebsm_possible(void)
28 {
29 #ifdef CONFIG_64BIT
30 return css_general_characteristics.qebsm;
31 #endif
32 return 0;
33 }
34
35 /*
36 * qib_param_field: pointer to 128 bytes or NULL, if no param field
37 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
38 */
39 static void set_impl_params(struct qdio_irq *irq_ptr,
40 unsigned int qib_param_field_format,
41 unsigned char *qib_param_field,
42 unsigned long *input_slib_elements,
43 unsigned long *output_slib_elements)
44 {
45 struct qdio_q *q;
46 int i, j;
47
48 if (!irq_ptr)
49 return;
50
51 irq_ptr->qib.pfmt = qib_param_field_format;
52 if (qib_param_field)
53 memcpy(irq_ptr->qib.parm, qib_param_field,
54 QDIO_MAX_BUFFERS_PER_Q);
55
56 if (!input_slib_elements)
57 goto output;
58
59 for_each_input_queue(irq_ptr, q, i) {
60 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
61 q->slib->slibe[j].parms =
62 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
63 }
64 output:
65 if (!output_slib_elements)
66 return;
67
68 for_each_output_queue(irq_ptr, q, i) {
69 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
70 q->slib->slibe[j].parms =
71 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
72 }
73 }
74
75 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
76 {
77 struct qdio_q *q;
78 int i;
79
80 for (i = 0; i < nr_queues; i++) {
81 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
82 if (!q)
83 return -ENOMEM;
84
85 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
86 if (!q->slib) {
87 kmem_cache_free(qdio_q_cache, q);
88 return -ENOMEM;
89 }
90 irq_ptr_qs[i] = q;
91 }
92 return 0;
93 }
94
95 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
96 {
97 int rc;
98
99 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
100 if (rc)
101 return rc;
102 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
103 return rc;
104 }
105
106 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
107 qdio_handler_t *handler, int i)
108 {
109 struct slib *slib = q->slib;
110
111 /* queue must be cleared for qdio_establish */
112 memset(q, 0, sizeof(*q));
113 memset(slib, 0, PAGE_SIZE);
114 q->slib = slib;
115 q->irq_ptr = irq_ptr;
116 q->mask = 1 << (31 - i);
117 q->nr = i;
118 q->handler = handler;
119 }
120
121 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
122 void **sbals_array, int i)
123 {
124 struct qdio_q *prev;
125 int j;
126
127 DBF_HEX(&q, sizeof(void *));
128 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
129
130 /* fill in sbal */
131 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) {
132 q->sbal[j] = *sbals_array++;
133 BUG_ON((unsigned long)q->sbal[j] & 0xff);
134 }
135
136 /* fill in slib */
137 if (i > 0) {
138 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
139 : irq_ptr->output_qs[i - 1];
140 prev->slib->nsliba = (unsigned long)q->slib;
141 }
142
143 q->slib->sla = (unsigned long)q->sl;
144 q->slib->slsba = (unsigned long)&q->slsb.val[0];
145
146 /* fill in sl */
147 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
148 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
149 }
150
151 static void setup_queues(struct qdio_irq *irq_ptr,
152 struct qdio_initialize *qdio_init)
153 {
154 struct qdio_q *q;
155 void **input_sbal_array = qdio_init->input_sbal_addr_array;
156 void **output_sbal_array = qdio_init->output_sbal_addr_array;
157 int i;
158
159 for_each_input_queue(irq_ptr, q, i) {
160 DBF_EVENT("in-q:%1d", i);
161 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
162
163 q->is_input_q = 1;
164 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
165 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
166
167 if (is_thinint_irq(irq_ptr))
168 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
169 (unsigned long) q);
170 else
171 tasklet_init(&q->tasklet, qdio_inbound_processing,
172 (unsigned long) q);
173 }
174
175 for_each_output_queue(irq_ptr, q, i) {
176 DBF_EVENT("outq:%1d", i);
177 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
178
179 q->is_input_q = 0;
180 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
181 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
182
183 tasklet_init(&q->tasklet, qdio_outbound_processing,
184 (unsigned long) q);
185 setup_timer(&q->u.out.timer, (void(*)(unsigned long))
186 &qdio_outbound_timer, (unsigned long)q);
187 }
188 }
189
190 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
191 {
192 if (qdioac & AC1_SIGA_INPUT_NEEDED)
193 irq_ptr->siga_flag.input = 1;
194 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
195 irq_ptr->siga_flag.output = 1;
196 if (qdioac & AC1_SIGA_SYNC_NEEDED)
197 irq_ptr->siga_flag.sync = 1;
198 if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)
199 irq_ptr->siga_flag.no_sync_ti = 1;
200 if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)
201 irq_ptr->siga_flag.no_sync_out_pci = 1;
202
203 if (irq_ptr->siga_flag.no_sync_out_pci &&
204 irq_ptr->siga_flag.no_sync_ti)
205 irq_ptr->siga_flag.no_sync_out_ti = 1;
206 }
207
208 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
209 unsigned char qdioac, unsigned long token)
210 {
211 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
212 goto no_qebsm;
213 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
214 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
215 goto no_qebsm;
216
217 irq_ptr->sch_token = token;
218
219 DBF_EVENT("V=V:1");
220 DBF_EVENT("%8lx", irq_ptr->sch_token);
221 return;
222
223 no_qebsm:
224 irq_ptr->sch_token = 0;
225 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
226 DBF_EVENT("noV=V");
227 }
228
229 /*
230 * If there is a qdio_irq we use the chsc_page and store the information
231 * in the qdio_irq, otherwise we copy it to the specified structure.
232 */
233 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
234 struct subchannel_id *schid,
235 struct qdio_ssqd_desc *data)
236 {
237 struct chsc_ssqd_area *ssqd;
238 int rc;
239
240 DBF_EVENT("getssqd:%4x", schid->sch_no);
241 if (irq_ptr != NULL)
242 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
243 else
244 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
245 memset(ssqd, 0, PAGE_SIZE);
246
247 ssqd->request = (struct chsc_header) {
248 .length = 0x0010,
249 .code = 0x0024,
250 };
251 ssqd->first_sch = schid->sch_no;
252 ssqd->last_sch = schid->sch_no;
253 ssqd->ssid = schid->ssid;
254
255 if (chsc(ssqd))
256 return -EIO;
257 rc = chsc_error_from_response(ssqd->response.code);
258 if (rc)
259 return rc;
260
261 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
262 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
263 (ssqd->qdio_ssqd.sch != schid->sch_no))
264 return -EINVAL;
265
266 if (irq_ptr != NULL)
267 memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
268 sizeof(struct qdio_ssqd_desc));
269 else {
270 memcpy(data, &ssqd->qdio_ssqd,
271 sizeof(struct qdio_ssqd_desc));
272 free_page((unsigned long)ssqd);
273 }
274 return 0;
275 }
276
277 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
278 {
279 unsigned char qdioac;
280 int rc;
281
282 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
283 if (rc) {
284 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
285 DBF_ERROR("rc:%x", rc);
286 /* all flags set, worst case */
287 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
288 AC1_SIGA_SYNC_NEEDED;
289 } else
290 qdioac = irq_ptr->ssqd_desc.qdioac1;
291
292 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
293 process_ac_flags(irq_ptr, qdioac);
294 DBF_EVENT("qdioac:%4x", qdioac);
295 }
296
297 void qdio_release_memory(struct qdio_irq *irq_ptr)
298 {
299 struct qdio_q *q;
300 int i;
301
302 /*
303 * Must check queue array manually since irq_ptr->nr_input_queues /
304 * irq_ptr->nr_input_queues may not yet be set.
305 */
306 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
307 q = irq_ptr->input_qs[i];
308 if (q) {
309 free_page((unsigned long) q->slib);
310 kmem_cache_free(qdio_q_cache, q);
311 }
312 }
313 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
314 q = irq_ptr->output_qs[i];
315 if (q) {
316 free_page((unsigned long) q->slib);
317 kmem_cache_free(qdio_q_cache, q);
318 }
319 }
320 free_page((unsigned long) irq_ptr->qdr);
321 free_page(irq_ptr->chsc_page);
322 free_page((unsigned long) irq_ptr);
323 }
324
325 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
326 struct qdio_q **irq_ptr_qs,
327 int i, int nr)
328 {
329 irq_ptr->qdr->qdf0[i + nr].sliba =
330 (unsigned long)irq_ptr_qs[i]->slib;
331
332 irq_ptr->qdr->qdf0[i + nr].sla =
333 (unsigned long)irq_ptr_qs[i]->sl;
334
335 irq_ptr->qdr->qdf0[i + nr].slsba =
336 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
337
338 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
339 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
340 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
341 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
342 }
343
344 static void setup_qdr(struct qdio_irq *irq_ptr,
345 struct qdio_initialize *qdio_init)
346 {
347 int i;
348
349 irq_ptr->qdr->qfmt = qdio_init->q_format;
350 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
351 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
352 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
353 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
354 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
355 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
356
357 for (i = 0; i < qdio_init->no_input_qs; i++)
358 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
359
360 for (i = 0; i < qdio_init->no_output_qs; i++)
361 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
362 qdio_init->no_input_qs);
363 }
364
365 static void setup_qib(struct qdio_irq *irq_ptr,
366 struct qdio_initialize *init_data)
367 {
368 if (qebsm_possible())
369 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
370
371 irq_ptr->qib.qfmt = init_data->q_format;
372 if (init_data->no_input_qs)
373 irq_ptr->qib.isliba =
374 (unsigned long)(irq_ptr->input_qs[0]->slib);
375 if (init_data->no_output_qs)
376 irq_ptr->qib.osliba =
377 (unsigned long)(irq_ptr->output_qs[0]->slib);
378 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
379 }
380
381 int qdio_setup_irq(struct qdio_initialize *init_data)
382 {
383 struct ciw *ciw;
384 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
385 int rc;
386
387 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
388 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
389 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
390 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
391 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
392
393 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
394 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
395
396 /* wipes qib.ac, required by ar7063 */
397 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
398
399 irq_ptr->int_parm = init_data->int_parm;
400 irq_ptr->nr_input_qs = init_data->no_input_qs;
401 irq_ptr->nr_output_qs = init_data->no_output_qs;
402
403 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
404 irq_ptr->cdev = init_data->cdev;
405 setup_queues(irq_ptr, init_data);
406
407 setup_qib(irq_ptr, init_data);
408 qdio_setup_thinint(irq_ptr);
409 set_impl_params(irq_ptr, init_data->qib_param_field_format,
410 init_data->qib_param_field,
411 init_data->input_slib_elements,
412 init_data->output_slib_elements);
413
414 /* fill input and output descriptors */
415 setup_qdr(irq_ptr, init_data);
416
417 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
418
419 /* get qdio commands */
420 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
421 if (!ciw) {
422 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
423 rc = -EINVAL;
424 goto out_err;
425 }
426 irq_ptr->equeue = *ciw;
427
428 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
429 if (!ciw) {
430 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
431 rc = -EINVAL;
432 goto out_err;
433 }
434 irq_ptr->aqueue = *ciw;
435
436 /* set new interrupt handler */
437 irq_ptr->orig_handler = init_data->cdev->handler;
438 init_data->cdev->handler = qdio_int_handler;
439 return 0;
440 out_err:
441 qdio_release_memory(irq_ptr);
442 return rc;
443 }
444
445 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
446 struct ccw_device *cdev)
447 {
448 char s[80];
449
450 snprintf(s, 80, "qdio: %s %s on SC %x using "
451 "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s%s\n",
452 dev_name(&cdev->dev),
453 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
454 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
455 irq_ptr->schid.sch_no,
456 is_thinint_irq(irq_ptr),
457 (irq_ptr->sch_token) ? 1 : 0,
458 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
459 css_general_characteristics.aif_tdd,
460 (irq_ptr->siga_flag.input) ? "R" : " ",
461 (irq_ptr->siga_flag.output) ? "W" : " ",
462 (irq_ptr->siga_flag.sync) ? "S" : " ",
463 (!irq_ptr->siga_flag.no_sync_ti) ? "A" : " ",
464 (!irq_ptr->siga_flag.no_sync_out_ti) ? "O" : " ",
465 (!irq_ptr->siga_flag.no_sync_out_pci) ? "P" : " ");
466 printk(KERN_INFO "%s", s);
467 }
468
469 int __init qdio_setup_init(void)
470 {
471 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
472 256, 0, NULL);
473 if (!qdio_q_cache)
474 return -ENOMEM;
475
476 /* Check for OSA/FCP thin interrupts (bit 67). */
477 DBF_EVENT("thinint:%1d",
478 (css_general_characteristics.aif_osa) ? 1 : 0);
479
480 /* Check for QEBSM support in general (bit 58). */
481 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
482 return 0;
483 }
484
485 void qdio_setup_exit(void)
486 {
487 kmem_cache_destroy(qdio_q_cache);
488 }
Linux with added FPC-III support