Merge branches 'x86/acpi', 'x86/asm', 'x86/cpudetect', 'x86/crashdump', 'x86/debug...
[linux-2.6] / drivers / s390 / cio / qdio_setup.c
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         WARN_ON((unsigned long)&irq_ptr->qib & 0xff);
52         irq_ptr->qib.pfmt = qib_param_field_format;
53         if (qib_param_field)
54                 memcpy(irq_ptr->qib.parm, qib_param_field,
55                        QDIO_MAX_BUFFERS_PER_Q);
56
57         if (!input_slib_elements)
58                 goto output;
59
60         for_each_input_queue(irq_ptr, q, i) {
61                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
62                         q->slib->slibe[j].parms =
63                                 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
64         }
65 output:
66         if (!output_slib_elements)
67                 return;
68
69         for_each_output_queue(irq_ptr, q, i) {
70                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
71                         q->slib->slibe[j].parms =
72                                 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
73         }
74 }
75
76 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
77 {
78         struct qdio_q *q;
79         int i;
80
81         for (i = 0; i < nr_queues; i++) {
82                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
83                 if (!q)
84                         return -ENOMEM;
85                 WARN_ON((unsigned long)q & 0xff);
86
87                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
88                 if (!q->slib) {
89                         kmem_cache_free(qdio_q_cache, q);
90                         return -ENOMEM;
91                 }
92                 WARN_ON((unsigned long)q->slib & 0x7ff);
93                 irq_ptr_qs[i] = q;
94         }
95         return 0;
96 }
97
98 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
99 {
100         int rc;
101
102         rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
103         if (rc)
104                 return rc;
105         rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
106         return rc;
107 }
108
109 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
110                               qdio_handler_t *handler, int i)
111 {
112         /* must be cleared by every qdio_establish */
113         memset(q, 0, ((char *)&q->slib) - ((char *)q));
114         memset(q->slib, 0, PAGE_SIZE);
115
116         q->irq_ptr = irq_ptr;
117         q->mask = 1 << (31 - i);
118         q->nr = i;
119         q->handler = handler;
120         spin_lock_init(&q->lock);
121 }
122
123 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
124                                 void **sbals_array, int i)
125 {
126         struct qdio_q *prev;
127         int j;
128
129         DBF_HEX(&q, sizeof(void *));
130         q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
131
132         /* fill in sbal */
133         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) {
134                 q->sbal[j] = *sbals_array++;
135                 WARN_ON((unsigned long)q->sbal[j] & 0xff);
136         }
137
138         /* fill in slib */
139         if (i > 0) {
140                 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
141                         : irq_ptr->output_qs[i - 1];
142                 prev->slib->nsliba = (unsigned long)q->slib;
143         }
144
145         q->slib->sla = (unsigned long)q->sl;
146         q->slib->slsba = (unsigned long)&q->slsb.val[0];
147
148         /* fill in sl */
149         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
150                 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
151
152         DBF_EVENT("sl-slsb-sbal");
153         DBF_HEX(q->sl, sizeof(void *));
154         DBF_HEX(&q->slsb, sizeof(void *));
155         DBF_HEX(q->sbal, sizeof(void *));
156 }
157
158 static void setup_queues(struct qdio_irq *irq_ptr,
159                          struct qdio_initialize *qdio_init)
160 {
161         struct qdio_q *q;
162         void **input_sbal_array = qdio_init->input_sbal_addr_array;
163         void **output_sbal_array = qdio_init->output_sbal_addr_array;
164         int i;
165
166         for_each_input_queue(irq_ptr, q, i) {
167                 DBF_EVENT("in-q:%1d", i);
168                 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
169
170                 q->is_input_q = 1;
171                 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
172                 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
173
174                 if (is_thinint_irq(irq_ptr))
175                         tasklet_init(&q->tasklet, tiqdio_inbound_processing,
176                                      (unsigned long) q);
177                 else
178                         tasklet_init(&q->tasklet, qdio_inbound_processing,
179                                      (unsigned long) q);
180         }
181
182         for_each_output_queue(irq_ptr, q, i) {
183                 DBF_EVENT("outq:%1d", i);
184                 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
185
186                 q->is_input_q = 0;
187                 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
188                 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
189
190                 tasklet_init(&q->tasklet, qdio_outbound_processing,
191                              (unsigned long) q);
192                 setup_timer(&q->u.out.timer, (void(*)(unsigned long))
193                             &qdio_outbound_timer, (unsigned long)q);
194         }
195 }
196
197 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
198 {
199         if (qdioac & AC1_SIGA_INPUT_NEEDED)
200                 irq_ptr->siga_flag.input = 1;
201         if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
202                 irq_ptr->siga_flag.output = 1;
203         if (qdioac & AC1_SIGA_SYNC_NEEDED)
204                 irq_ptr->siga_flag.sync = 1;
205         if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)
206                 irq_ptr->siga_flag.no_sync_ti = 1;
207         if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)
208                 irq_ptr->siga_flag.no_sync_out_pci = 1;
209
210         if (irq_ptr->siga_flag.no_sync_out_pci &&
211             irq_ptr->siga_flag.no_sync_ti)
212                 irq_ptr->siga_flag.no_sync_out_ti = 1;
213 }
214
215 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
216                                   unsigned char qdioac, unsigned long token)
217 {
218         if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
219                 goto no_qebsm;
220         if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
221             (!(qdioac & AC1_SC_QEBSM_ENABLED)))
222                 goto no_qebsm;
223
224         irq_ptr->sch_token = token;
225
226         DBF_EVENT("V=V:1");
227         DBF_EVENT("%8lx", irq_ptr->sch_token);
228         return;
229
230 no_qebsm:
231         irq_ptr->sch_token = 0;
232         irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
233         DBF_EVENT("noV=V");
234 }
235
236 /*
237  * If there is a qdio_irq we use the chsc_page and store the information
238  * in the qdio_irq, otherwise we copy it to the specified structure.
239  */
240 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
241                         struct subchannel_id *schid,
242                         struct qdio_ssqd_desc *data)
243 {
244         struct chsc_ssqd_area *ssqd;
245         int rc;
246
247         DBF_EVENT("getssqd:%4x", schid->sch_no);
248         if (irq_ptr != NULL)
249                 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
250         else
251                 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
252         memset(ssqd, 0, PAGE_SIZE);
253
254         ssqd->request = (struct chsc_header) {
255                 .length = 0x0010,
256                 .code   = 0x0024,
257         };
258         ssqd->first_sch = schid->sch_no;
259         ssqd->last_sch = schid->sch_no;
260         ssqd->ssid = schid->ssid;
261
262         if (chsc(ssqd))
263                 return -EIO;
264         rc = chsc_error_from_response(ssqd->response.code);
265         if (rc)
266                 return rc;
267
268         if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
269             !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
270             (ssqd->qdio_ssqd.sch != schid->sch_no))
271                 return -EINVAL;
272
273         if (irq_ptr != NULL)
274                 memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
275                        sizeof(struct qdio_ssqd_desc));
276         else {
277                 memcpy(data, &ssqd->qdio_ssqd,
278                        sizeof(struct qdio_ssqd_desc));
279                 free_page((unsigned long)ssqd);
280         }
281         return 0;
282 }
283
284 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
285 {
286         unsigned char qdioac;
287         int rc;
288
289         rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
290         if (rc) {
291                 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
292                 DBF_ERROR("rc:%x", rc);
293                 /* all flags set, worst case */
294                 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
295                          AC1_SIGA_SYNC_NEEDED;
296         } else
297                 qdioac = irq_ptr->ssqd_desc.qdioac1;
298
299         check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
300         process_ac_flags(irq_ptr, qdioac);
301         DBF_EVENT("qdioac:%4x", qdioac);
302 }
303
304 void qdio_release_memory(struct qdio_irq *irq_ptr)
305 {
306         struct qdio_q *q;
307         int i;
308
309         /*
310          * Must check queue array manually since irq_ptr->nr_input_queues /
311          * irq_ptr->nr_input_queues may not yet be set.
312          */
313         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
314                 q = irq_ptr->input_qs[i];
315                 if (q) {
316                         free_page((unsigned long) q->slib);
317                         kmem_cache_free(qdio_q_cache, q);
318                 }
319         }
320         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
321                 q = irq_ptr->output_qs[i];
322                 if (q) {
323                         free_page((unsigned long) q->slib);
324                         kmem_cache_free(qdio_q_cache, q);
325                 }
326         }
327         free_page((unsigned long) irq_ptr->qdr);
328         free_page(irq_ptr->chsc_page);
329         free_page((unsigned long) irq_ptr);
330 }
331
332 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
333                                      struct qdio_q **irq_ptr_qs,
334                                      int i, int nr)
335 {
336         irq_ptr->qdr->qdf0[i + nr].sliba =
337                 (unsigned long)irq_ptr_qs[i]->slib;
338
339         irq_ptr->qdr->qdf0[i + nr].sla =
340                 (unsigned long)irq_ptr_qs[i]->sl;
341
342         irq_ptr->qdr->qdf0[i + nr].slsba =
343                 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
344
345         irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY;
346         irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY;
347         irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY;
348         irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY;
349 }
350
351 static void setup_qdr(struct qdio_irq *irq_ptr,
352                       struct qdio_initialize *qdio_init)
353 {
354         int i;
355
356         irq_ptr->qdr->qfmt = qdio_init->q_format;
357         irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
358         irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
359         irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
360         irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
361         irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
362         irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY;
363
364         for (i = 0; i < qdio_init->no_input_qs; i++)
365                 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
366
367         for (i = 0; i < qdio_init->no_output_qs; i++)
368                 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
369                                          qdio_init->no_input_qs);
370 }
371
372 static void setup_qib(struct qdio_irq *irq_ptr,
373                       struct qdio_initialize *init_data)
374 {
375         if (qebsm_possible())
376                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
377
378         irq_ptr->qib.qfmt = init_data->q_format;
379         if (init_data->no_input_qs)
380                 irq_ptr->qib.isliba =
381                         (unsigned long)(irq_ptr->input_qs[0]->slib);
382         if (init_data->no_output_qs)
383                 irq_ptr->qib.osliba =
384                         (unsigned long)(irq_ptr->output_qs[0]->slib);
385         memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
386 }
387
388 int qdio_setup_irq(struct qdio_initialize *init_data)
389 {
390         struct ciw *ciw;
391         struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
392         int rc;
393
394         memset(irq_ptr, 0, ((char *)&irq_ptr->qdr) - ((char *)irq_ptr));
395         /* wipes qib.ac, required by ar7063 */
396         memset(irq_ptr->qdr, 0, sizeof(struct qdr));
397
398         irq_ptr->int_parm = init_data->int_parm;
399         irq_ptr->nr_input_qs = init_data->no_input_qs;
400         irq_ptr->nr_output_qs = init_data->no_output_qs;
401
402         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
403         irq_ptr->cdev = init_data->cdev;
404         setup_queues(irq_ptr, init_data);
405
406         setup_qib(irq_ptr, init_data);
407         qdio_setup_thinint(irq_ptr);
408         set_impl_params(irq_ptr, init_data->qib_param_field_format,
409                         init_data->qib_param_field,
410                         init_data->input_slib_elements,
411                         init_data->output_slib_elements);
412
413         /* fill input and output descriptors */
414         setup_qdr(irq_ptr, init_data);
415
416         /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
417
418         /* get qdio commands */
419         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
420         if (!ciw) {
421                 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
422                 rc = -EINVAL;
423                 goto out_err;
424         }
425         irq_ptr->equeue = *ciw;
426
427         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
428         if (!ciw) {
429                 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
430                 rc = -EINVAL;
431                 goto out_err;
432         }
433         irq_ptr->aqueue = *ciw;
434
435         /* set new interrupt handler */
436         irq_ptr->orig_handler = init_data->cdev->handler;
437         init_data->cdev->handler = qdio_int_handler;
438         return 0;
439 out_err:
440         qdio_release_memory(irq_ptr);
441         return rc;
442 }
443
444 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
445                                 struct ccw_device *cdev)
446 {
447         char s[80];
448
449         snprintf(s, 80, "qdio: %s %s on SC %x using "
450                  "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s%s\n",
451                  dev_name(&cdev->dev),
452                  (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
453                         ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
454                  irq_ptr->schid.sch_no,
455                  is_thinint_irq(irq_ptr),
456                  (irq_ptr->sch_token) ? 1 : 0,
457                  (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
458                  css_general_characteristics.aif_tdd,
459                  (irq_ptr->siga_flag.input) ? "R" : " ",
460                  (irq_ptr->siga_flag.output) ? "W" : " ",
461                  (irq_ptr->siga_flag.sync) ? "S" : " ",
462                  (!irq_ptr->siga_flag.no_sync_ti) ? "A" : " ",
463                  (!irq_ptr->siga_flag.no_sync_out_ti) ? "O" : " ",
464                  (!irq_ptr->siga_flag.no_sync_out_pci) ? "P" : " ");
465         printk(KERN_INFO "%s", s);
466 }
467
468 int __init qdio_setup_init(void)
469 {
470         qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
471                                          256, 0, NULL);
472         if (!qdio_q_cache)
473                 return -ENOMEM;
474
475         /* Check for OSA/FCP thin interrupts (bit 67). */
476         DBF_EVENT("thinint:%1d",
477                   (css_general_characteristics.aif_osa) ? 1 : 0);
478
479         /* Check for QEBSM support in general (bit 58). */
480         DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
481         return 0;
482 }
483
484 void qdio_setup_exit(void)
485 {
486         kmem_cache_destroy(qdio_q_cache);
487 }