1 /* 2 * qdio queue initialization 3 * 4 * Copyright IBM Corp. 2008 5 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com> 6 */ 7 #include <linux/kernel.h> 8 #include <linux/slab.h> 9 #include <linux/export.h> 10 #include <asm/qdio.h> 11 12 #include "cio.h" 13 #include "css.h" 14 #include "device.h" 15 #include "ioasm.h" 16 #include "chsc.h" 17 #include "qdio.h" 18 #include "qdio_debug.h" 19 20 static struct kmem_cache *qdio_q_cache; 21 static struct kmem_cache *qdio_aob_cache; 22 23 struct qaob *qdio_allocate_aob(void) 24 { 25 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC); 26 } 27 EXPORT_SYMBOL_GPL(qdio_allocate_aob); 28 29 void qdio_release_aob(struct qaob *aob) 30 { 31 kmem_cache_free(qdio_aob_cache, aob); 32 } 33 EXPORT_SYMBOL_GPL(qdio_release_aob); 34 35 /* 36 * qebsm is only available under 64bit but the adapter sets the feature 37 * flag anyway, so we manually override it. 38 */ 39 static inline int qebsm_possible(void) 40 { 41 #ifdef CONFIG_64BIT 42 return css_general_characteristics.qebsm; 43 #endif 44 return 0; 45 } 46 47 /* 48 * qib_param_field: pointer to 128 bytes or NULL, if no param field 49 * nr_input_qs: pointer to nr_queues*128 words of data or NULL 50 */ 51 static void set_impl_params(struct qdio_irq *irq_ptr, 52 unsigned int qib_param_field_format, 53 unsigned char *qib_param_field, 54 unsigned long *input_slib_elements, 55 unsigned long *output_slib_elements) 56 { 57 struct qdio_q *q; 58 int i, j; 59 60 if (!irq_ptr) 61 return; 62 63 irq_ptr->qib.pfmt = qib_param_field_format; 64 if (qib_param_field) 65 memcpy(irq_ptr->qib.parm, qib_param_field, 66 QDIO_MAX_BUFFERS_PER_Q); 67 68 if (!input_slib_elements) 69 goto output; 70 71 for_each_input_queue(irq_ptr, q, i) { 72 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 73 q->slib->slibe[j].parms = 74 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 75 } 76 output: 77 if (!output_slib_elements) 78 return; 79 80 for_each_output_queue(irq_ptr, q, i) { 81 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 82 q->slib->slibe[j].parms = 83 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 84 } 85 } 86 87 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues) 88 { 89 struct qdio_q *q; 90 int i; 91 92 for (i = 0; i < nr_queues; i++) { 93 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL); 94 if (!q) 95 return -ENOMEM; 96 97 q->slib = (struct slib *) __get_free_page(GFP_KERNEL); 98 if (!q->slib) { 99 kmem_cache_free(qdio_q_cache, q); 100 return -ENOMEM; 101 } 102 irq_ptr_qs[i] = q; 103 } 104 return 0; 105 } 106 107 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs) 108 { 109 int rc; 110 111 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs); 112 if (rc) 113 return rc; 114 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs); 115 return rc; 116 } 117 118 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr, 119 qdio_handler_t *handler, int i) 120 { 121 struct slib *slib = q->slib; 122 123 /* queue must be cleared for qdio_establish */ 124 memset(q, 0, sizeof(*q)); 125 memset(slib, 0, PAGE_SIZE); 126 q->slib = slib; 127 q->irq_ptr = irq_ptr; 128 q->mask = 1 << (31 - i); 129 q->nr = i; 130 q->handler = handler; 131 } 132 133 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr, 134 void **sbals_array, int i) 135 { 136 struct qdio_q *prev; 137 int j; 138 139 DBF_HEX(&q, sizeof(void *)); 140 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2); 141 142 /* fill in sbal */ 143 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 144 q->sbal[j] = *sbals_array++; 145 146 /* fill in slib */ 147 if (i > 0) { 148 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1] 149 : irq_ptr->output_qs[i - 1]; 150 prev->slib->nsliba = (unsigned long)q->slib; 151 } 152 153 q->slib->sla = (unsigned long)q->sl; 154 q->slib->slsba = (unsigned long)&q->slsb.val[0]; 155 156 /* fill in sl */ 157 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 158 q->sl->element[j].sbal = (unsigned long)q->sbal[j]; 159 } 160 161 static void setup_queues(struct qdio_irq *irq_ptr, 162 struct qdio_initialize *qdio_init) 163 { 164 struct qdio_q *q; 165 void **input_sbal_array = qdio_init->input_sbal_addr_array; 166 void **output_sbal_array = qdio_init->output_sbal_addr_array; 167 struct qdio_outbuf_state *output_sbal_state_array = 168 qdio_init->output_sbal_state_array; 169 int i; 170 171 for_each_input_queue(irq_ptr, q, i) { 172 DBF_EVENT("inq:%1d", i); 173 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i); 174 175 q->is_input_q = 1; 176 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ? 177 qdio_init->queue_start_poll_array[i] : NULL; 178 179 setup_storage_lists(q, irq_ptr, input_sbal_array, i); 180 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 181 182 if (is_thinint_irq(irq_ptr)) { 183 tasklet_init(&q->tasklet, tiqdio_inbound_processing, 184 (unsigned long) q); 185 } else { 186 tasklet_init(&q->tasklet, qdio_inbound_processing, 187 (unsigned long) q); 188 } 189 } 190 191 for_each_output_queue(irq_ptr, q, i) { 192 DBF_EVENT("outq:%1d", i); 193 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i); 194 195 q->u.out.sbal_state = output_sbal_state_array; 196 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q; 197 198 q->is_input_q = 0; 199 q->u.out.scan_threshold = qdio_init->scan_threshold; 200 setup_storage_lists(q, irq_ptr, output_sbal_array, i); 201 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 202 203 tasklet_init(&q->tasklet, qdio_outbound_processing, 204 (unsigned long) q); 205 setup_timer(&q->u.out.timer, (void(*)(unsigned long)) 206 &qdio_outbound_timer, (unsigned long)q); 207 } 208 } 209 210 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac) 211 { 212 if (qdioac & AC1_SIGA_INPUT_NEEDED) 213 irq_ptr->siga_flag.input = 1; 214 if (qdioac & AC1_SIGA_OUTPUT_NEEDED) 215 irq_ptr->siga_flag.output = 1; 216 if (qdioac & AC1_SIGA_SYNC_NEEDED) 217 irq_ptr->siga_flag.sync = 1; 218 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)) 219 irq_ptr->siga_flag.sync_after_ai = 1; 220 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)) 221 irq_ptr->siga_flag.sync_out_after_pci = 1; 222 } 223 224 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr, 225 unsigned char qdioac, unsigned long token) 226 { 227 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM)) 228 goto no_qebsm; 229 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) || 230 (!(qdioac & AC1_SC_QEBSM_ENABLED))) 231 goto no_qebsm; 232 233 irq_ptr->sch_token = token; 234 235 DBF_EVENT("V=V:1"); 236 DBF_EVENT("%8lx", irq_ptr->sch_token); 237 return; 238 239 no_qebsm: 240 irq_ptr->sch_token = 0; 241 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; 242 DBF_EVENT("noV=V"); 243 } 244 245 /* 246 * If there is a qdio_irq we use the chsc_page and store the information 247 * in the qdio_irq, otherwise we copy it to the specified structure. 248 */ 249 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr, 250 struct subchannel_id *schid, 251 struct qdio_ssqd_desc *data) 252 { 253 struct chsc_ssqd_area *ssqd; 254 int rc; 255 256 DBF_EVENT("getssqd:%4x", schid->sch_no); 257 if (irq_ptr != NULL) 258 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page; 259 else 260 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL); 261 memset(ssqd, 0, PAGE_SIZE); 262 263 ssqd->request = (struct chsc_header) { 264 .length = 0x0010, 265 .code = 0x0024, 266 }; 267 ssqd->first_sch = schid->sch_no; 268 ssqd->last_sch = schid->sch_no; 269 ssqd->ssid = schid->ssid; 270 271 if (chsc(ssqd)) 272 return -EIO; 273 rc = chsc_error_from_response(ssqd->response.code); 274 if (rc) 275 return rc; 276 277 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) || 278 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) || 279 (ssqd->qdio_ssqd.sch != schid->sch_no)) 280 return -EINVAL; 281 282 if (irq_ptr != NULL) 283 memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd, 284 sizeof(struct qdio_ssqd_desc)); 285 else { 286 memcpy(data, &ssqd->qdio_ssqd, 287 sizeof(struct qdio_ssqd_desc)); 288 free_page((unsigned long)ssqd); 289 } 290 return 0; 291 } 292 293 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr) 294 { 295 unsigned char qdioac; 296 int rc; 297 298 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL); 299 if (rc) { 300 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no); 301 DBF_ERROR("rc:%x", rc); 302 /* all flags set, worst case */ 303 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED | 304 AC1_SIGA_SYNC_NEEDED; 305 } else 306 qdioac = irq_ptr->ssqd_desc.qdioac1; 307 308 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token); 309 process_ac_flags(irq_ptr, qdioac); 310 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2); 311 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac); 312 } 313 314 void qdio_release_memory(struct qdio_irq *irq_ptr) 315 { 316 struct qdio_q *q; 317 int i; 318 319 /* 320 * Must check queue array manually since irq_ptr->nr_input_queues / 321 * irq_ptr->nr_input_queues may not yet be set. 322 */ 323 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) { 324 q = irq_ptr->input_qs[i]; 325 if (q) { 326 free_page((unsigned long) q->slib); 327 kmem_cache_free(qdio_q_cache, q); 328 } 329 } 330 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) { 331 q = irq_ptr->output_qs[i]; 332 if (q) { 333 if (q->u.out.use_cq) { 334 int n; 335 336 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) { 337 struct qaob *aob = q->u.out.aobs[n]; 338 if (aob) { 339 qdio_release_aob(aob); 340 q->u.out.aobs[n] = NULL; 341 } 342 } 343 344 qdio_disable_async_operation(&q->u.out); 345 } 346 free_page((unsigned long) q->slib); 347 kmem_cache_free(qdio_q_cache, q); 348 } 349 } 350 free_page((unsigned long) irq_ptr->qdr); 351 free_page(irq_ptr->chsc_page); 352 free_page((unsigned long) irq_ptr); 353 } 354 355 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr, 356 struct qdio_q **irq_ptr_qs, 357 int i, int nr) 358 { 359 irq_ptr->qdr->qdf0[i + nr].sliba = 360 (unsigned long)irq_ptr_qs[i]->slib; 361 362 irq_ptr->qdr->qdf0[i + nr].sla = 363 (unsigned long)irq_ptr_qs[i]->sl; 364 365 irq_ptr->qdr->qdf0[i + nr].slsba = 366 (unsigned long)&irq_ptr_qs[i]->slsb.val[0]; 367 368 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4; 369 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4; 370 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4; 371 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4; 372 } 373 374 static void setup_qdr(struct qdio_irq *irq_ptr, 375 struct qdio_initialize *qdio_init) 376 { 377 int i; 378 379 irq_ptr->qdr->qfmt = qdio_init->q_format; 380 irq_ptr->qdr->ac = qdio_init->qdr_ac; 381 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs; 382 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs; 383 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */ 384 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4; 385 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib; 386 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4; 387 388 for (i = 0; i < qdio_init->no_input_qs; i++) 389 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0); 390 391 for (i = 0; i < qdio_init->no_output_qs; i++) 392 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i, 393 qdio_init->no_input_qs); 394 } 395 396 static void setup_qib(struct qdio_irq *irq_ptr, 397 struct qdio_initialize *init_data) 398 { 399 if (qebsm_possible()) 400 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM; 401 402 irq_ptr->qib.rflags |= init_data->qib_rflags; 403 404 irq_ptr->qib.qfmt = init_data->q_format; 405 if (init_data->no_input_qs) 406 irq_ptr->qib.isliba = 407 (unsigned long)(irq_ptr->input_qs[0]->slib); 408 if (init_data->no_output_qs) 409 irq_ptr->qib.osliba = 410 (unsigned long)(irq_ptr->output_qs[0]->slib); 411 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8); 412 } 413 414 int qdio_setup_irq(struct qdio_initialize *init_data) 415 { 416 struct ciw *ciw; 417 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data; 418 int rc; 419 420 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib)); 421 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag)); 422 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw)); 423 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc)); 424 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat)); 425 426 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL; 427 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0; 428 429 /* wipes qib.ac, required by ar7063 */ 430 memset(irq_ptr->qdr, 0, sizeof(struct qdr)); 431 432 irq_ptr->int_parm = init_data->int_parm; 433 irq_ptr->nr_input_qs = init_data->no_input_qs; 434 irq_ptr->nr_output_qs = init_data->no_output_qs; 435 irq_ptr->cdev = init_data->cdev; 436 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid); 437 setup_queues(irq_ptr, init_data); 438 439 setup_qib(irq_ptr, init_data); 440 qdio_setup_thinint(irq_ptr); 441 set_impl_params(irq_ptr, init_data->qib_param_field_format, 442 init_data->qib_param_field, 443 init_data->input_slib_elements, 444 init_data->output_slib_elements); 445 446 /* fill input and output descriptors */ 447 setup_qdr(irq_ptr, init_data); 448 449 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */ 450 451 /* get qdio commands */ 452 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE); 453 if (!ciw) { 454 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no); 455 rc = -EINVAL; 456 goto out_err; 457 } 458 irq_ptr->equeue = *ciw; 459 460 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE); 461 if (!ciw) { 462 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no); 463 rc = -EINVAL; 464 goto out_err; 465 } 466 irq_ptr->aqueue = *ciw; 467 468 /* set new interrupt handler */ 469 irq_ptr->orig_handler = init_data->cdev->handler; 470 init_data->cdev->handler = qdio_int_handler; 471 return 0; 472 out_err: 473 qdio_release_memory(irq_ptr); 474 return rc; 475 } 476 477 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr, 478 struct ccw_device *cdev) 479 { 480 char s[80]; 481 482 snprintf(s, 80, "qdio: %s %s on SC %x using " 483 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n", 484 dev_name(&cdev->dev), 485 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" : 486 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"), 487 irq_ptr->schid.sch_no, 488 is_thinint_irq(irq_ptr), 489 (irq_ptr->sch_token) ? 1 : 0, 490 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0, 491 css_general_characteristics.aif_tdd, 492 (irq_ptr->siga_flag.input) ? "R" : " ", 493 (irq_ptr->siga_flag.output) ? "W" : " ", 494 (irq_ptr->siga_flag.sync) ? "S" : " ", 495 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ", 496 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " "); 497 printk(KERN_INFO "%s", s); 498 } 499 500 int qdio_enable_async_operation(struct qdio_output_q *outq) 501 { 502 outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q, 503 GFP_ATOMIC); 504 if (!outq->aobs) { 505 outq->use_cq = 0; 506 return -ENOMEM; 507 } 508 outq->use_cq = 1; 509 return 0; 510 } 511 512 void qdio_disable_async_operation(struct qdio_output_q *q) 513 { 514 kfree(q->aobs); 515 q->aobs = NULL; 516 q->use_cq = 0; 517 } 518 519 int __init qdio_setup_init(void) 520 { 521 int rc; 522 523 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q), 524 256, 0, NULL); 525 if (!qdio_q_cache) 526 return -ENOMEM; 527 528 qdio_aob_cache = kmem_cache_create("qdio_aob", 529 sizeof(struct qaob), 530 sizeof(struct qaob), 531 0, 532 NULL); 533 if (!qdio_aob_cache) { 534 rc = -ENOMEM; 535 goto free_qdio_q_cache; 536 } 537 538 /* Check for OSA/FCP thin interrupts (bit 67). */ 539 DBF_EVENT("thinint:%1d", 540 (css_general_characteristics.aif_osa) ? 1 : 0); 541 542 /* Check for QEBSM support in general (bit 58). */ 543 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0); 544 rc = 0; 545 out: 546 return rc; 547 free_qdio_q_cache: 548 kmem_cache_destroy(qdio_q_cache); 549 goto out; 550 } 551 552 void qdio_setup_exit(void) 553 { 554 kmem_cache_destroy(qdio_aob_cache); 555 kmem_cache_destroy(qdio_q_cache); 556 } 557